1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, function results and
607 in allocate statements if the allocate_object is an assumed length dummy
608 in external functions. Internal function results and results of module
609 procedures are not on this list, ergo, not permitted. */
611 if (sym
->result
->ts
.type
== BT_CHARACTER
)
613 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
614 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
616 /* See if this is a module-procedure and adapt error message
619 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
620 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
622 gfc_error (module_proc
623 ? G_("Character-valued module procedure %qs at %L"
624 " must not be assumed length")
625 : G_("Character-valued internal function %qs at %L"
626 " must not be assumed length"),
627 sym
->name
, &sym
->declared_at
);
633 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
634 introduce duplicates. */
637 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
639 gfc_formal_arglist
*f
, *new_arglist
;
642 for (; new_args
!= NULL
; new_args
= new_args
->next
)
644 new_sym
= new_args
->sym
;
645 /* See if this arg is already in the formal argument list. */
646 for (f
= proc
->formal
; f
; f
= f
->next
)
648 if (new_sym
== f
->sym
)
655 /* Add a new argument. Argument order is not important. */
656 new_arglist
= gfc_get_formal_arglist ();
657 new_arglist
->sym
= new_sym
;
658 new_arglist
->next
= proc
->formal
;
659 proc
->formal
= new_arglist
;
664 /* Flag the arguments that are not present in all entries. */
667 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
669 gfc_formal_arglist
*f
, *head
;
672 for (f
= proc
->formal
; f
; f
= f
->next
)
677 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
679 if (new_args
->sym
== f
->sym
)
686 f
->sym
->attr
.not_always_present
= 1;
691 /* Resolve alternate entry points. If a symbol has multiple entry points we
692 create a new master symbol for the main routine, and turn the existing
693 symbol into an entry point. */
696 resolve_entries (gfc_namespace
*ns
)
698 gfc_namespace
*old_ns
;
702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
703 static int master_count
= 0;
705 if (ns
->proc_name
== NULL
)
708 /* No need to do anything if this procedure doesn't have alternate entry
713 /* We may already have resolved alternate entry points. */
714 if (ns
->proc_name
->attr
.entry_master
)
717 /* If this isn't a procedure something has gone horribly wrong. */
718 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
720 /* Remember the current namespace. */
721 old_ns
= gfc_current_ns
;
725 /* Add the main entry point to the list of entry points. */
726 el
= gfc_get_entry_list ();
727 el
->sym
= ns
->proc_name
;
729 el
->next
= ns
->entries
;
731 ns
->proc_name
->attr
.entry
= 1;
733 /* If it is a module function, it needs to be in the right namespace
734 so that gfc_get_fake_result_decl can gather up the results. The
735 need for this arose in get_proc_name, where these beasts were
736 left in their own namespace, to keep prior references linked to
737 the entry declaration.*/
738 if (ns
->proc_name
->attr
.function
739 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
742 /* Do the same for entries where the master is not a module
743 procedure. These are retained in the module namespace because
744 of the module procedure declaration. */
745 for (el
= el
->next
; el
; el
= el
->next
)
746 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
747 && el
->sym
->attr
.mod_proc
)
751 /* Add an entry statement for it. */
752 c
= gfc_get_code (EXEC_ENTRY
);
757 /* Create a new symbol for the master function. */
758 /* Give the internal function a unique name (within this file).
759 Also include the function name so the user has some hope of figuring
760 out what is going on. */
761 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
762 master_count
++, ns
->proc_name
->name
);
763 gfc_get_ha_symbol (name
, &proc
);
764 gcc_assert (proc
!= NULL
);
766 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
767 if (ns
->proc_name
->attr
.subroutine
)
768 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
772 gfc_typespec
*ts
, *fts
;
773 gfc_array_spec
*as
, *fas
;
774 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
776 fas
= ns
->entries
->sym
->as
;
777 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
778 fts
= &ns
->entries
->sym
->result
->ts
;
779 if (fts
->type
== BT_UNKNOWN
)
780 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
781 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
783 ts
= &el
->sym
->result
->ts
;
785 as
= as
? as
: el
->sym
->result
->as
;
786 if (ts
->type
== BT_UNKNOWN
)
787 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
789 if (! gfc_compare_types (ts
, fts
)
790 || (el
->sym
->result
->attr
.dimension
791 != ns
->entries
->sym
->result
->attr
.dimension
)
792 || (el
->sym
->result
->attr
.pointer
793 != ns
->entries
->sym
->result
->attr
.pointer
))
795 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
796 && gfc_compare_array_spec (as
, fas
) == 0)
797 gfc_error ("Function %s at %L has entries with mismatched "
798 "array specifications", ns
->entries
->sym
->name
,
799 &ns
->entries
->sym
->declared_at
);
800 /* The characteristics need to match and thus both need to have
801 the same string length, i.e. both len=*, or both len=4.
802 Having both len=<variable> is also possible, but difficult to
803 check at compile time. */
804 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
805 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
806 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
808 && ts
->u
.cl
->length
->expr_type
809 != fts
->u
.cl
->length
->expr_type
)
811 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
812 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
813 fts
->u
.cl
->length
->value
.integer
) != 0)))
814 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
815 "entries returning variables of different "
816 "string lengths", ns
->entries
->sym
->name
,
817 &ns
->entries
->sym
->declared_at
);
822 sym
= ns
->entries
->sym
->result
;
823 /* All result types the same. */
825 if (sym
->attr
.dimension
)
826 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
827 if (sym
->attr
.pointer
)
828 gfc_add_pointer (&proc
->attr
, NULL
);
832 /* Otherwise the result will be passed through a union by
834 proc
->attr
.mixed_entry_master
= 1;
835 for (el
= ns
->entries
; el
; el
= el
->next
)
837 sym
= el
->sym
->result
;
838 if (sym
->attr
.dimension
)
840 if (el
== ns
->entries
)
841 gfc_error ("FUNCTION result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 gfc_error ("ENTRY result %s can't be an array in "
846 "FUNCTION %s at %L", sym
->name
,
847 ns
->entries
->sym
->name
, &sym
->declared_at
);
849 else if (sym
->attr
.pointer
)
851 if (el
== ns
->entries
)
852 gfc_error ("FUNCTION result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
856 gfc_error ("ENTRY result %s can't be a POINTER in "
857 "FUNCTION %s at %L", sym
->name
,
858 ns
->entries
->sym
->name
, &sym
->declared_at
);
863 if (ts
->type
== BT_UNKNOWN
)
864 ts
= gfc_get_default_type (sym
->name
, NULL
);
868 if (ts
->kind
== gfc_default_integer_kind
)
872 if (ts
->kind
== gfc_default_real_kind
873 || ts
->kind
== gfc_default_double_kind
)
877 if (ts
->kind
== gfc_default_complex_kind
)
881 if (ts
->kind
== gfc_default_logical_kind
)
885 /* We will issue error elsewhere. */
893 if (el
== ns
->entries
)
894 gfc_error ("FUNCTION result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
899 gfc_error ("ENTRY result %s can't be of type %s "
900 "in FUNCTION %s at %L", sym
->name
,
901 gfc_typename (ts
), ns
->entries
->sym
->name
,
908 proc
->attr
.access
= ACCESS_PRIVATE
;
909 proc
->attr
.entry_master
= 1;
911 /* Merge all the entry point arguments. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 merge_argument_lists (proc
, el
->sym
->formal
);
915 /* Check the master formal arguments for any that are not
916 present in all entry points. */
917 for (el
= ns
->entries
; el
; el
= el
->next
)
918 check_argument_lists (proc
, el
->sym
->formal
);
920 /* Use the master function for the function body. */
921 ns
->proc_name
= proc
;
923 /* Finalize the new symbols. */
924 gfc_commit_symbols ();
926 /* Restore the original namespace. */
927 gfc_current_ns
= old_ns
;
931 /* Resolve common variables. */
933 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
935 gfc_symbol
*csym
= common_block
->head
;
937 for (; csym
; csym
= csym
->common_next
)
939 /* gfc_add_in_common may have been called before, but the reported errors
940 have been ignored to continue parsing.
941 We do the checks again here. */
942 if (!csym
->attr
.use_assoc
)
943 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 if (csym
->value
|| csym
->attr
.data
)
947 if (!csym
->ns
->is_block_data
)
948 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
949 "but only in BLOCK DATA initialization is "
950 "allowed", csym
->name
, &csym
->declared_at
);
951 else if (!named_common
)
952 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
953 "in a blank COMMON but initialization is only "
954 "allowed in named common blocks", csym
->name
,
958 if (UNLIMITED_POLY (csym
))
959 gfc_error_now ("%qs in cannot appear in COMMON at %L "
960 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
962 if (csym
->ts
.type
!= BT_DERIVED
)
965 if (!(csym
->ts
.u
.derived
->attr
.sequence
966 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has neither the SEQUENCE nor the BIND(C) "
969 "attribute", csym
->name
, &csym
->declared_at
);
970 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has an ultimate component that is "
973 "allocatable", csym
->name
, &csym
->declared_at
);
974 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "may not have default initializer", csym
->name
,
979 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
980 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
984 /* Resolve common blocks. */
986 resolve_common_blocks (gfc_symtree
*common_root
)
991 if (common_root
== NULL
)
994 if (common_root
->left
)
995 resolve_common_blocks (common_root
->left
);
996 if (common_root
->right
)
997 resolve_common_blocks (common_root
->right
);
999 resolve_common_vars (common_root
->n
.common
, true);
1001 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
1002 &common_root
->n
.common
->where
))
1005 /* The common name is a global name - in Fortran 2003 also if it has a
1006 C binding name, since Fortran 2008 only the C binding name is a global
1008 if (!common_root
->n
.common
->binding_label
1009 || gfc_notification_std (GFC_STD_F2008
))
1011 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1012 common_root
->n
.common
->name
);
1014 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1015 && gsym
->type
== GSYM_COMMON
1016 && ((common_root
->n
.common
->binding_label
1017 && (!gsym
->binding_label
1018 || strcmp (common_root
->n
.common
->binding_label
,
1019 gsym
->binding_label
) != 0))
1020 || (!common_root
->n
.common
->binding_label
1021 && gsym
->binding_label
)))
1023 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1024 "identifier and must thus have the same binding name "
1025 "as the same-named COMMON block at %L: %s vs %s",
1026 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1028 common_root
->n
.common
->binding_label
1029 ? common_root
->n
.common
->binding_label
: "(blank)",
1030 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
1035 && !common_root
->n
.common
->binding_label
)
1037 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1039 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1043 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1045 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1046 "%L sharing the identifier with global non-COMMON-block "
1047 "entity at %L", common_root
->n
.common
->name
,
1048 &common_root
->n
.common
->where
, &gsym
->where
);
1053 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1054 gsym
->type
= GSYM_COMMON
;
1055 gsym
->where
= common_root
->n
.common
->where
;
1061 if (common_root
->n
.common
->binding_label
)
1063 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1064 common_root
->n
.common
->binding_label
);
1065 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1067 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1068 "global identifier as entity at %L",
1069 &common_root
->n
.common
->where
,
1070 common_root
->n
.common
->binding_label
, &gsym
->where
);
1075 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1076 gsym
->type
= GSYM_COMMON
;
1077 gsym
->where
= common_root
->n
.common
->where
;
1083 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1087 if (sym
->attr
.flavor
== FL_PARAMETER
)
1088 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1089 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1091 if (sym
->attr
.external
)
1092 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1093 sym
->name
, &common_root
->n
.common
->where
);
1095 if (sym
->attr
.intrinsic
)
1096 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1097 sym
->name
, &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.result
1099 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a function result", sym
->name
,
1102 &common_root
->n
.common
->where
);
1103 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1104 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1105 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1106 "that is also a global procedure", sym
->name
,
1107 &common_root
->n
.common
->where
);
1111 /* Resolve contained function types. Because contained functions can call one
1112 another, they have to be worked out before any of the contained procedures
1115 The good news is that if a function doesn't already have a type, the only
1116 way it can get one is through an IMPLICIT type or a RESULT variable, because
1117 by definition contained functions are contained namespace they're contained
1118 in, not in a sibling or parent namespace. */
1121 resolve_contained_functions (gfc_namespace
*ns
)
1123 gfc_namespace
*child
;
1126 resolve_formal_arglists (ns
);
1128 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1130 /* Resolve alternate entry points first. */
1131 resolve_entries (child
);
1133 /* Then check function return types. */
1134 resolve_contained_fntype (child
->proc_name
, child
);
1135 for (el
= child
->entries
; el
; el
= el
->next
)
1136 resolve_contained_fntype (el
->sym
, child
);
1142 /* A Parameterized Derived Type constructor must contain values for
1143 the PDT KIND parameters or they must have a default initializer.
1144 Go through the constructor picking out the KIND expressions,
1145 storing them in 'param_list' and then call gfc_get_pdt_instance
1146 to obtain the PDT instance. */
1148 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1151 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1153 param
= gfc_get_actual_arglist ();
1155 param_list
= param_tail
= param
;
1158 param_tail
->next
= param
;
1159 param_tail
= param_tail
->next
;
1162 param_tail
->name
= c
->name
;
1164 param_tail
->expr
= gfc_copy_expr (expr
);
1165 else if (c
->initializer
)
1166 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1169 param_tail
->spec_type
= SPEC_ASSUMED
;
1170 if (c
->attr
.pdt_kind
)
1172 gfc_error ("The KIND parameter %qs in the PDT constructor "
1173 "at %C has no value", param
->name
);
1182 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1183 gfc_symbol
*derived
)
1185 gfc_constructor
*cons
= NULL
;
1186 gfc_component
*comp
;
1189 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1190 cons
= gfc_constructor_first (expr
->value
.constructor
);
1195 comp
= derived
->components
;
1197 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1200 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1201 && comp
->ts
.type
== BT_DERIVED
)
1203 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1207 else if (comp
->ts
.type
== BT_DERIVED
)
1209 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1213 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1214 && derived
->attr
.pdt_template
)
1216 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1225 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1226 static bool resolve_fl_struct (gfc_symbol
*sym
);
1229 /* Resolve all of the elements of a structure constructor and make sure that
1230 the types are correct. The 'init' flag indicates that the given
1231 constructor is an initializer. */
1234 resolve_structure_cons (gfc_expr
*expr
, int init
)
1236 gfc_constructor
*cons
;
1237 gfc_component
*comp
;
1243 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1245 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1246 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1248 resolve_fl_struct (expr
->ts
.u
.derived
);
1250 /* If this is a Parameterized Derived Type template, find the
1251 instance corresponding to the PDT kind parameters. */
1252 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1255 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1258 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1260 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1263 gfc_free_actual_arglist (param_list
);
1265 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1270 cons
= gfc_constructor_first (expr
->value
.constructor
);
1272 /* A constructor may have references if it is the result of substituting a
1273 parameter variable. In this case we just pull out the component we
1276 comp
= expr
->ref
->u
.c
.sym
->components
;
1278 comp
= expr
->ts
.u
.derived
->components
;
1280 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1287 /* Unions use an EXPR_NULL contrived expression to tell the translation
1288 phase to generate an initializer of the appropriate length.
1290 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1293 if (!gfc_resolve_expr (cons
->expr
))
1299 rank
= comp
->as
? comp
->as
->rank
: 0;
1300 if (comp
->ts
.type
== BT_CLASS
1301 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1302 && CLASS_DATA (comp
)->as
)
1303 rank
= CLASS_DATA (comp
)->as
->rank
;
1305 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1306 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1308 gfc_error ("The rank of the element in the structure "
1309 "constructor at %L does not match that of the "
1310 "component (%d/%d)", &cons
->expr
->where
,
1311 cons
->expr
->rank
, rank
);
1315 /* If we don't have the right type, try to convert it. */
1317 if (!comp
->attr
.proc_pointer
&&
1318 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1320 if (strcmp (comp
->name
, "_extends") == 0)
1322 /* Can afford to be brutal with the _extends initializer.
1323 The derived type can get lost because it is PRIVATE
1324 but it is not usage constrained by the standard. */
1325 cons
->expr
->ts
= comp
->ts
;
1327 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1329 gfc_error ("The element in the structure constructor at %L, "
1330 "for pointer component %qs, is %s but should be %s",
1331 &cons
->expr
->where
, comp
->name
,
1332 gfc_basic_typename (cons
->expr
->ts
.type
),
1333 gfc_basic_typename (comp
->ts
.type
));
1338 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1344 /* For strings, the length of the constructor should be the same as
1345 the one of the structure, ensure this if the lengths are known at
1346 compile time and when we are dealing with PARAMETER or structure
1348 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1349 && comp
->ts
.u
.cl
->length
1350 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1351 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1352 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1353 && cons
->expr
->rank
!= 0
1354 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1355 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1357 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1358 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1360 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1361 to make use of the gfc_resolve_character_array_constructor
1362 machinery. The expression is later simplified away to
1363 an array of string literals. */
1364 gfc_expr
*para
= cons
->expr
;
1365 cons
->expr
= gfc_get_expr ();
1366 cons
->expr
->ts
= para
->ts
;
1367 cons
->expr
->where
= para
->where
;
1368 cons
->expr
->expr_type
= EXPR_ARRAY
;
1369 cons
->expr
->rank
= para
->rank
;
1370 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1371 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1372 para
, &cons
->expr
->where
);
1375 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1377 /* Rely on the cleanup of the namespace to deal correctly with
1378 the old charlen. (There was a block here that attempted to
1379 remove the charlen but broke the chain in so doing.) */
1380 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1381 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1382 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1383 gfc_resolve_character_array_constructor (cons
->expr
);
1387 if (cons
->expr
->expr_type
== EXPR_NULL
1388 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1389 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1390 || (comp
->ts
.type
== BT_CLASS
1391 && (CLASS_DATA (comp
)->attr
.class_pointer
1392 || CLASS_DATA (comp
)->attr
.allocatable
))))
1395 gfc_error ("The NULL in the structure constructor at %L is "
1396 "being applied to component %qs, which is neither "
1397 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1401 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1403 /* Check procedure pointer interface. */
1404 gfc_symbol
*s2
= NULL
;
1409 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1412 s2
= c2
->ts
.interface
;
1415 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1417 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1418 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1420 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1422 s2
= cons
->expr
->symtree
->n
.sym
;
1423 name
= cons
->expr
->symtree
->n
.sym
->name
;
1426 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1427 err
, sizeof (err
), NULL
, NULL
))
1429 gfc_error_opt (OPT_Wargument_mismatch
,
1430 "Interface mismatch for procedure-pointer "
1431 "component %qs in structure constructor at %L:"
1432 " %s", comp
->name
, &cons
->expr
->where
, err
);
1437 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1438 || cons
->expr
->expr_type
== EXPR_NULL
)
1441 a
= gfc_expr_attr (cons
->expr
);
1443 if (!a
.pointer
&& !a
.target
)
1446 gfc_error ("The element in the structure constructor at %L, "
1447 "for pointer component %qs should be a POINTER or "
1448 "a TARGET", &cons
->expr
->where
, comp
->name
);
1453 /* F08:C461. Additional checks for pointer initialization. */
1457 gfc_error ("Pointer initialization target at %L "
1458 "must not be ALLOCATABLE", &cons
->expr
->where
);
1463 gfc_error ("Pointer initialization target at %L "
1464 "must have the SAVE attribute", &cons
->expr
->where
);
1468 /* F2003, C1272 (3). */
1469 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1470 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1471 || gfc_is_coindexed (cons
->expr
));
1472 if (impure
&& gfc_pure (NULL
))
1475 gfc_error ("Invalid expression in the structure constructor for "
1476 "pointer component %qs at %L in PURE procedure",
1477 comp
->name
, &cons
->expr
->where
);
1481 gfc_unset_implicit_pure (NULL
);
1488 /****************** Expression name resolution ******************/
1490 /* Returns 0 if a symbol was not declared with a type or
1491 attribute declaration statement, nonzero otherwise. */
1494 was_declared (gfc_symbol
*sym
)
1500 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1503 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1504 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1505 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1506 || a
.asynchronous
|| a
.codimension
)
1513 /* Determine if a symbol is generic or not. */
1516 generic_sym (gfc_symbol
*sym
)
1520 if (sym
->attr
.generic
||
1521 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1524 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1527 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1534 return generic_sym (s
);
1541 /* Determine if a symbol is specific or not. */
1544 specific_sym (gfc_symbol
*sym
)
1548 if (sym
->attr
.if_source
== IFSRC_IFBODY
1549 || sym
->attr
.proc
== PROC_MODULE
1550 || sym
->attr
.proc
== PROC_INTERNAL
1551 || sym
->attr
.proc
== PROC_ST_FUNCTION
1552 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1553 || sym
->attr
.external
)
1556 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1561 return (s
== NULL
) ? 0 : specific_sym (s
);
1565 /* Figure out if the procedure is specific, generic or unknown. */
1568 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1571 procedure_kind (gfc_symbol
*sym
)
1573 if (generic_sym (sym
))
1574 return PTYPE_GENERIC
;
1576 if (specific_sym (sym
))
1577 return PTYPE_SPECIFIC
;
1579 return PTYPE_UNKNOWN
;
1582 /* Check references to assumed size arrays. The flag need_full_assumed_size
1583 is nonzero when matching actual arguments. */
1585 static int need_full_assumed_size
= 0;
1588 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1590 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1593 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1594 What should it be? */
1595 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1596 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1597 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1599 gfc_error ("The upper bound in the last dimension must "
1600 "appear in the reference to the assumed size "
1601 "array %qs at %L", sym
->name
, &e
->where
);
1608 /* Look for bad assumed size array references in argument expressions
1609 of elemental and array valued intrinsic procedures. Since this is
1610 called from procedure resolution functions, it only recurses at
1614 resolve_assumed_size_actual (gfc_expr
*e
)
1619 switch (e
->expr_type
)
1622 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1627 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1628 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1639 /* Check a generic procedure, passed as an actual argument, to see if
1640 there is a matching specific name. If none, it is an error, and if
1641 more than one, the reference is ambiguous. */
1643 count_specific_procs (gfc_expr
*e
)
1650 sym
= e
->symtree
->n
.sym
;
1652 for (p
= sym
->generic
; p
; p
= p
->next
)
1653 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1655 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1661 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1665 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1666 "argument at %L", sym
->name
, &e
->where
);
1672 /* See if a call to sym could possibly be a not allowed RECURSION because of
1673 a missing RECURSIVE declaration. This means that either sym is the current
1674 context itself, or sym is the parent of a contained procedure calling its
1675 non-RECURSIVE containing procedure.
1676 This also works if sym is an ENTRY. */
1679 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1681 gfc_symbol
* proc_sym
;
1682 gfc_symbol
* context_proc
;
1683 gfc_namespace
* real_context
;
1685 if (sym
->attr
.flavor
== FL_PROGRAM
1686 || gfc_fl_struct (sym
->attr
.flavor
))
1689 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Resolve an actual argument list. Most of the time, this is just
1868 resolving the expressions in the list.
1869 The exception is that we sometimes have to decide whether arguments
1870 that look like procedure arguments are really simple variable
1874 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1875 bool no_formal_args
)
1878 gfc_symtree
*parent_st
;
1880 gfc_component
*comp
;
1881 int save_need_full_assumed_size
;
1882 bool return_value
= false;
1883 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1886 first_actual_arg
= true;
1888 for (; arg
; arg
= arg
->next
)
1893 /* Check the label is a valid branching target. */
1896 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1898 gfc_error ("Label %d referenced at %L is never defined",
1899 arg
->label
->value
, &arg
->label
->where
);
1903 first_actual_arg
= false;
1907 if (e
->expr_type
== EXPR_VARIABLE
1908 && e
->symtree
->n
.sym
->attr
.generic
1910 && count_specific_procs (e
) != 1)
1913 if (e
->ts
.type
!= BT_PROCEDURE
)
1915 save_need_full_assumed_size
= need_full_assumed_size
;
1916 if (e
->expr_type
!= EXPR_VARIABLE
)
1917 need_full_assumed_size
= 0;
1918 if (!gfc_resolve_expr (e
))
1920 need_full_assumed_size
= save_need_full_assumed_size
;
1924 /* See if the expression node should really be a variable reference. */
1926 sym
= e
->symtree
->n
.sym
;
1928 if (sym
->attr
.flavor
== FL_PROCEDURE
1929 || sym
->attr
.intrinsic
1930 || sym
->attr
.external
)
1934 /* If a procedure is not already determined to be something else
1935 check if it is intrinsic. */
1936 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1937 sym
->attr
.intrinsic
= 1;
1939 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1941 gfc_error ("Statement function %qs at %L is not allowed as an "
1942 "actual argument", sym
->name
, &e
->where
);
1945 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1946 sym
->attr
.subroutine
);
1947 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1949 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1950 "actual argument", sym
->name
, &e
->where
);
1953 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1954 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1956 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1957 " used as actual argument at %L",
1958 sym
->name
, &e
->where
))
1962 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1964 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1965 "allowed as an actual argument at %L", sym
->name
,
1969 /* Check if a generic interface has a specific procedure
1970 with the same name before emitting an error. */
1971 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1974 /* Just in case a specific was found for the expression. */
1975 sym
= e
->symtree
->n
.sym
;
1977 /* If the symbol is the function that names the current (or
1978 parent) scope, then we really have a variable reference. */
1980 if (gfc_is_function_return_value (sym
, sym
->ns
))
1983 /* If all else fails, see if we have a specific intrinsic. */
1984 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1986 gfc_intrinsic_sym
*isym
;
1988 isym
= gfc_find_function (sym
->name
);
1989 if (isym
== NULL
|| !isym
->specific
)
1991 gfc_error ("Unable to find a specific INTRINSIC procedure "
1992 "for the reference %qs at %L", sym
->name
,
1997 sym
->attr
.intrinsic
= 1;
1998 sym
->attr
.function
= 1;
2001 if (!gfc_resolve_expr (e
))
2006 /* See if the name is a module procedure in a parent unit. */
2008 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2011 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2013 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2017 if (parent_st
== NULL
)
2020 sym
= parent_st
->n
.sym
;
2021 e
->symtree
= parent_st
; /* Point to the right thing. */
2023 if (sym
->attr
.flavor
== FL_PROCEDURE
2024 || sym
->attr
.intrinsic
2025 || sym
->attr
.external
)
2027 if (!gfc_resolve_expr (e
))
2033 e
->expr_type
= EXPR_VARIABLE
;
2035 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2036 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2037 && CLASS_DATA (sym
)->as
))
2039 e
->rank
= sym
->ts
.type
== BT_CLASS
2040 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2041 e
->ref
= gfc_get_ref ();
2042 e
->ref
->type
= REF_ARRAY
;
2043 e
->ref
->u
.ar
.type
= AR_FULL
;
2044 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2045 ? CLASS_DATA (sym
)->as
: sym
->as
;
2048 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2049 primary.c (match_actual_arg). If above code determines that it
2050 is a variable instead, it needs to be resolved as it was not
2051 done at the beginning of this function. */
2052 save_need_full_assumed_size
= need_full_assumed_size
;
2053 if (e
->expr_type
!= EXPR_VARIABLE
)
2054 need_full_assumed_size
= 0;
2055 if (!gfc_resolve_expr (e
))
2057 need_full_assumed_size
= save_need_full_assumed_size
;
2060 /* Check argument list functions %VAL, %LOC and %REF. There is
2061 nothing to do for %REF. */
2062 if (arg
->name
&& arg
->name
[0] == '%')
2064 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2066 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2068 gfc_error ("By-value argument at %L is not of numeric "
2075 gfc_error ("By-value argument at %L cannot be an array or "
2076 "an array section", &e
->where
);
2080 /* Intrinsics are still PROC_UNKNOWN here. However,
2081 since same file external procedures are not resolvable
2082 in gfortran, it is a good deal easier to leave them to
2084 if (ptype
!= PROC_UNKNOWN
2085 && ptype
!= PROC_DUMMY
2086 && ptype
!= PROC_EXTERNAL
2087 && ptype
!= PROC_MODULE
)
2089 gfc_error ("By-value argument at %L is not allowed "
2090 "in this context", &e
->where
);
2095 /* Statement functions have already been excluded above. */
2096 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2097 && e
->ts
.type
== BT_PROCEDURE
)
2099 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2101 gfc_error ("Passing internal procedure at %L by location "
2102 "not allowed", &e
->where
);
2108 comp
= gfc_get_proc_ptr_comp(e
);
2109 if (e
->expr_type
== EXPR_VARIABLE
2110 && comp
&& comp
->attr
.elemental
)
2112 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2113 "allowed as an actual argument at %L", comp
->name
,
2117 /* Fortran 2008, C1237. */
2118 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2119 && gfc_has_ultimate_pointer (e
))
2121 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2122 "component", &e
->where
);
2126 first_actual_arg
= false;
2129 return_value
= true;
2132 actual_arg
= actual_arg_sav
;
2133 first_actual_arg
= first_actual_arg_sav
;
2135 return return_value
;
2139 /* Do the checks of the actual argument list that are specific to elemental
2140 procedures. If called with c == NULL, we have a function, otherwise if
2141 expr == NULL, we have a subroutine. */
2144 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2146 gfc_actual_arglist
*arg0
;
2147 gfc_actual_arglist
*arg
;
2148 gfc_symbol
*esym
= NULL
;
2149 gfc_intrinsic_sym
*isym
= NULL
;
2151 gfc_intrinsic_arg
*iformal
= NULL
;
2152 gfc_formal_arglist
*eformal
= NULL
;
2153 bool formal_optional
= false;
2154 bool set_by_optional
= false;
2158 /* Is this an elemental procedure? */
2159 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2161 if (expr
->value
.function
.esym
!= NULL
2162 && expr
->value
.function
.esym
->attr
.elemental
)
2164 arg0
= expr
->value
.function
.actual
;
2165 esym
= expr
->value
.function
.esym
;
2167 else if (expr
->value
.function
.isym
!= NULL
2168 && expr
->value
.function
.isym
->elemental
)
2170 arg0
= expr
->value
.function
.actual
;
2171 isym
= expr
->value
.function
.isym
;
2176 else if (c
&& c
->ext
.actual
!= NULL
)
2178 arg0
= c
->ext
.actual
;
2180 if (c
->resolved_sym
)
2181 esym
= c
->resolved_sym
;
2183 esym
= c
->symtree
->n
.sym
;
2186 if (!esym
->attr
.elemental
)
2192 /* The rank of an elemental is the rank of its array argument(s). */
2193 for (arg
= arg0
; arg
; arg
= arg
->next
)
2195 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2197 rank
= arg
->expr
->rank
;
2198 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2199 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2200 set_by_optional
= true;
2202 /* Function specific; set the result rank and shape. */
2206 if (!expr
->shape
&& arg
->expr
->shape
)
2208 expr
->shape
= gfc_get_shape (rank
);
2209 for (i
= 0; i
< rank
; i
++)
2210 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2217 /* If it is an array, it shall not be supplied as an actual argument
2218 to an elemental procedure unless an array of the same rank is supplied
2219 as an actual argument corresponding to a nonoptional dummy argument of
2220 that elemental procedure(12.4.1.5). */
2221 formal_optional
= false;
2223 iformal
= isym
->formal
;
2225 eformal
= esym
->formal
;
2227 for (arg
= arg0
; arg
; arg
= arg
->next
)
2231 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2232 formal_optional
= true;
2233 eformal
= eformal
->next
;
2235 else if (isym
&& iformal
)
2237 if (iformal
->optional
)
2238 formal_optional
= true;
2239 iformal
= iformal
->next
;
2242 formal_optional
= true;
2244 if (pedantic
&& arg
->expr
!= NULL
2245 && arg
->expr
->expr_type
== EXPR_VARIABLE
2246 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2249 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2250 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2252 gfc_warning (OPT_Wpedantic
,
2253 "%qs at %L is an array and OPTIONAL; IF IT IS "
2254 "MISSING, it cannot be the actual argument of an "
2255 "ELEMENTAL procedure unless there is a non-optional "
2256 "argument with the same rank (12.4.1.5)",
2257 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2261 for (arg
= arg0
; arg
; arg
= arg
->next
)
2263 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2266 /* Being elemental, the last upper bound of an assumed size array
2267 argument must be present. */
2268 if (resolve_assumed_size_actual (arg
->expr
))
2271 /* Elemental procedure's array actual arguments must conform. */
2274 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2281 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2282 is an array, the intent inout/out variable needs to be also an array. */
2283 if (rank
> 0 && esym
&& expr
== NULL
)
2284 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2285 arg
= arg
->next
, eformal
= eformal
->next
)
2286 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2287 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2288 && arg
->expr
&& arg
->expr
->rank
== 0)
2290 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2291 "ELEMENTAL subroutine %qs is a scalar, but another "
2292 "actual argument is an array", &arg
->expr
->where
,
2293 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2294 : "INOUT", eformal
->sym
->name
, esym
->name
);
2301 /* This function does the checking of references to global procedures
2302 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2303 77 and 95 standards. It checks for a gsymbol for the name, making
2304 one if it does not already exist. If it already exists, then the
2305 reference being resolved must correspond to the type of gsymbol.
2306 Otherwise, the new symbol is equipped with the attributes of the
2307 reference. The corresponding code that is called in creating
2308 global entities is parse.c.
2310 In addition, for all but -std=legacy, the gsymbols are used to
2311 check the interfaces of external procedures from the same file.
2312 The namespace of the gsymbol is resolved and then, once this is
2313 done the interface is checked. */
2317 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2319 if (!gsym_ns
->proc_name
->attr
.recursive
)
2322 if (sym
->ns
== gsym_ns
)
2325 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2332 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2334 if (gsym_ns
->entries
)
2336 gfc_entry_list
*entry
= gsym_ns
->entries
;
2338 for (; entry
; entry
= entry
->next
)
2340 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2342 if (strcmp (gsym_ns
->proc_name
->name
,
2343 sym
->ns
->proc_name
->name
) == 0)
2347 && strcmp (gsym_ns
->proc_name
->name
,
2348 sym
->ns
->parent
->proc_name
->name
) == 0)
2357 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2360 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2362 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2364 for ( ; arg
; arg
= arg
->next
)
2369 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2371 strncpy (errmsg
, _("allocatable argument"), err_len
);
2374 else if (arg
->sym
->attr
.asynchronous
)
2376 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2379 else if (arg
->sym
->attr
.optional
)
2381 strncpy (errmsg
, _("optional argument"), err_len
);
2384 else if (arg
->sym
->attr
.pointer
)
2386 strncpy (errmsg
, _("pointer argument"), err_len
);
2389 else if (arg
->sym
->attr
.target
)
2391 strncpy (errmsg
, _("target argument"), err_len
);
2394 else if (arg
->sym
->attr
.value
)
2396 strncpy (errmsg
, _("value argument"), err_len
);
2399 else if (arg
->sym
->attr
.volatile_
)
2401 strncpy (errmsg
, _("volatile argument"), err_len
);
2404 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2406 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2409 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2411 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2414 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2416 strncpy (errmsg
, _("coarray argument"), err_len
);
2419 else if (false) /* (2d) TODO: parametrized derived type */
2421 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2424 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2426 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2429 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2431 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2434 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2436 /* As assumed-type is unlimited polymorphic (cf. above).
2437 See also TS 29113, Note 6.1. */
2438 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2443 if (sym
->attr
.function
)
2445 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2447 if (res
->attr
.dimension
) /* (3a) */
2449 strncpy (errmsg
, _("array result"), err_len
);
2452 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2454 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2457 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2458 && res
->ts
.u
.cl
->length
2459 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2461 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2466 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2468 strncpy (errmsg
, _("elemental procedure"), err_len
);
2471 else if (sym
->attr
.is_bind_c
) /* (5) */
2473 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2482 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2483 gfc_actual_arglist
**actual
, int sub
)
2487 enum gfc_symbol_type type
;
2490 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2492 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2494 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2495 gfc_global_used (gsym
, where
);
2497 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2498 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2499 && gsym
->type
!= GSYM_UNKNOWN
2500 && !gsym
->binding_label
2502 && gsym
->ns
->resolved
!= -1
2503 && gsym
->ns
->proc_name
2504 && not_in_recursive (sym
, gsym
->ns
)
2505 && not_entry_self_reference (sym
, gsym
->ns
))
2507 gfc_symbol
*def_sym
;
2509 /* Resolve the gsymbol namespace if needed. */
2510 if (!gsym
->ns
->resolved
)
2512 gfc_symbol
*old_dt_list
;
2514 /* Stash away derived types so that the backend_decls do not
2516 old_dt_list
= gfc_derived_types
;
2517 gfc_derived_types
= NULL
;
2519 gfc_resolve (gsym
->ns
);
2521 /* Store the new derived types with the global namespace. */
2522 if (gfc_derived_types
)
2523 gsym
->ns
->derived_types
= gfc_derived_types
;
2525 /* Restore the derived types of this namespace. */
2526 gfc_derived_types
= old_dt_list
;
2529 /* Make sure that translation for the gsymbol occurs before
2530 the procedure currently being resolved. */
2531 ns
= gfc_global_ns_list
;
2532 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2534 if (ns
->sibling
== gsym
->ns
)
2536 ns
->sibling
= gsym
->ns
->sibling
;
2537 gsym
->ns
->sibling
= gfc_global_ns_list
;
2538 gfc_global_ns_list
= gsym
->ns
;
2543 def_sym
= gsym
->ns
->proc_name
;
2545 /* This can happen if a binding name has been specified. */
2546 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2547 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2549 if (def_sym
->attr
.entry_master
)
2551 gfc_entry_list
*entry
;
2552 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2553 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2555 def_sym
= entry
->sym
;
2560 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2562 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2563 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2564 gfc_typename (&def_sym
->ts
));
2568 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2569 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2571 gfc_error ("Explicit interface required for %qs at %L: %s",
2572 sym
->name
, &sym
->declared_at
, reason
);
2576 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2577 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2578 gfc_errors_to_warnings (true);
2580 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2581 reason
, sizeof(reason
), NULL
, NULL
))
2583 gfc_error_opt (OPT_Wargument_mismatch
,
2584 "Interface mismatch in global procedure %qs at %L:"
2585 " %s", sym
->name
, &sym
->declared_at
, reason
);
2590 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2591 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2592 gfc_errors_to_warnings (true);
2594 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2595 gfc_procedure_use (def_sym
, actual
, where
);
2599 gfc_errors_to_warnings (false);
2601 if (gsym
->type
== GSYM_UNKNOWN
)
2604 gsym
->where
= *where
;
2611 /************* Function resolution *************/
2613 /* Resolve a function call known to be generic.
2614 Section 14.1.2.4.1. */
2617 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2621 if (sym
->attr
.generic
)
2623 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2626 expr
->value
.function
.name
= s
->name
;
2627 expr
->value
.function
.esym
= s
;
2629 if (s
->ts
.type
!= BT_UNKNOWN
)
2631 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2632 expr
->ts
= s
->result
->ts
;
2635 expr
->rank
= s
->as
->rank
;
2636 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2637 expr
->rank
= s
->result
->as
->rank
;
2639 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2644 /* TODO: Need to search for elemental references in generic
2648 if (sym
->attr
.intrinsic
)
2649 return gfc_intrinsic_func_interface (expr
, 0);
2656 resolve_generic_f (gfc_expr
*expr
)
2660 gfc_interface
*intr
= NULL
;
2662 sym
= expr
->symtree
->n
.sym
;
2666 m
= resolve_generic_f0 (expr
, sym
);
2669 else if (m
== MATCH_ERROR
)
2674 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2675 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2678 if (sym
->ns
->parent
== NULL
)
2680 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2684 if (!generic_sym (sym
))
2688 /* Last ditch attempt. See if the reference is to an intrinsic
2689 that possesses a matching interface. 14.1.2.4 */
2690 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2692 if (gfc_init_expr_flag
)
2693 gfc_error ("Function %qs in initialization expression at %L "
2694 "must be an intrinsic function",
2695 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2697 gfc_error ("There is no specific function for the generic %qs "
2698 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2704 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2707 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2709 return resolve_structure_cons (expr
, 0);
2712 m
= gfc_intrinsic_func_interface (expr
, 0);
2717 gfc_error ("Generic function %qs at %L is not consistent with a "
2718 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2725 /* Resolve a function call known to be specific. */
2728 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2732 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2734 if (sym
->attr
.dummy
)
2736 sym
->attr
.proc
= PROC_DUMMY
;
2740 sym
->attr
.proc
= PROC_EXTERNAL
;
2744 if (sym
->attr
.proc
== PROC_MODULE
2745 || sym
->attr
.proc
== PROC_ST_FUNCTION
2746 || sym
->attr
.proc
== PROC_INTERNAL
)
2749 if (sym
->attr
.intrinsic
)
2751 m
= gfc_intrinsic_func_interface (expr
, 1);
2755 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2756 "with an intrinsic", sym
->name
, &expr
->where
);
2764 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2767 expr
->ts
= sym
->result
->ts
;
2770 expr
->value
.function
.name
= sym
->name
;
2771 expr
->value
.function
.esym
= sym
;
2772 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2774 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2776 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2777 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2778 else if (sym
->as
!= NULL
)
2779 expr
->rank
= sym
->as
->rank
;
2786 resolve_specific_f (gfc_expr
*expr
)
2791 sym
= expr
->symtree
->n
.sym
;
2795 m
= resolve_specific_f0 (sym
, expr
);
2798 if (m
== MATCH_ERROR
)
2801 if (sym
->ns
->parent
== NULL
)
2804 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2810 gfc_error ("Unable to resolve the specific function %qs at %L",
2811 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2816 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2817 candidates in CANDIDATES_LEN. */
2820 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2822 size_t &candidates_len
)
2828 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2829 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2830 vec_push (candidates
, candidates_len
, sym
->name
);
2834 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2838 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2842 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2845 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2847 char **candidates
= NULL
;
2848 size_t candidates_len
= 0;
2849 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2850 return gfc_closest_fuzzy_match (fn
, candidates
);
2854 /* Resolve a procedure call not known to be generic nor specific. */
2857 resolve_unknown_f (gfc_expr
*expr
)
2862 sym
= expr
->symtree
->n
.sym
;
2864 if (sym
->attr
.dummy
)
2866 sym
->attr
.proc
= PROC_DUMMY
;
2867 expr
->value
.function
.name
= sym
->name
;
2871 /* See if we have an intrinsic function reference. */
2873 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2875 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2880 /* The reference is to an external name. */
2882 sym
->attr
.proc
= PROC_EXTERNAL
;
2883 expr
->value
.function
.name
= sym
->name
;
2884 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2886 if (sym
->as
!= NULL
)
2887 expr
->rank
= sym
->as
->rank
;
2889 /* Type of the expression is either the type of the symbol or the
2890 default type of the symbol. */
2893 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2895 if (sym
->ts
.type
!= BT_UNKNOWN
)
2899 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2901 if (ts
->type
== BT_UNKNOWN
)
2904 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2906 gfc_error ("Function %qs at %L has no IMPLICIT type"
2907 "; did you mean %qs?",
2908 sym
->name
, &expr
->where
, guessed
);
2910 gfc_error ("Function %qs at %L has no IMPLICIT type",
2911 sym
->name
, &expr
->where
);
2922 /* Return true, if the symbol is an external procedure. */
2924 is_external_proc (gfc_symbol
*sym
)
2926 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2927 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2928 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2929 && !sym
->attr
.proc_pointer
2930 && !sym
->attr
.use_assoc
2938 /* Figure out if a function reference is pure or not. Also set the name
2939 of the function for a potential error message. Return nonzero if the
2940 function is PURE, zero if not. */
2942 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2945 gfc_pure_function (gfc_expr
*e
, const char **name
)
2948 gfc_component
*comp
;
2952 if (e
->symtree
!= NULL
2953 && e
->symtree
->n
.sym
!= NULL
2954 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2955 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2957 comp
= gfc_get_proc_ptr_comp (e
);
2960 pure
= gfc_pure (comp
->ts
.interface
);
2963 else if (e
->value
.function
.esym
)
2965 pure
= gfc_pure (e
->value
.function
.esym
);
2966 *name
= e
->value
.function
.esym
->name
;
2968 else if (e
->value
.function
.isym
)
2970 pure
= e
->value
.function
.isym
->pure
2971 || e
->value
.function
.isym
->elemental
;
2972 *name
= e
->value
.function
.isym
->name
;
2976 /* Implicit functions are not pure. */
2978 *name
= e
->value
.function
.name
;
2985 /* Check if the expression is a reference to an implicitly pure function. */
2988 gfc_implicit_pure_function (gfc_expr
*e
)
2990 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2992 return gfc_implicit_pure (comp
->ts
.interface
);
2993 else if (e
->value
.function
.esym
)
2994 return gfc_implicit_pure (e
->value
.function
.esym
);
3001 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3002 int *f ATTRIBUTE_UNUSED
)
3006 /* Don't bother recursing into other statement functions
3007 since they will be checked individually for purity. */
3008 if (e
->expr_type
!= EXPR_FUNCTION
3010 || e
->symtree
->n
.sym
== sym
3011 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3014 return gfc_pure_function (e
, &name
) ? false : true;
3019 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3021 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3025 /* Check if an impure function is allowed in the current context. */
3027 static bool check_pure_function (gfc_expr
*e
)
3029 const char *name
= NULL
;
3030 if (!gfc_pure_function (e
, &name
) && name
)
3034 gfc_error ("Reference to impure function %qs at %L inside a "
3035 "FORALL %s", name
, &e
->where
,
3036 forall_flag
== 2 ? "mask" : "block");
3039 else if (gfc_do_concurrent_flag
)
3041 gfc_error ("Reference to impure function %qs at %L inside a "
3042 "DO CONCURRENT %s", name
, &e
->where
,
3043 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3046 else if (gfc_pure (NULL
))
3048 gfc_error ("Reference to impure function %qs at %L "
3049 "within a PURE procedure", name
, &e
->where
);
3052 if (!gfc_implicit_pure_function (e
))
3053 gfc_unset_implicit_pure (NULL
);
3059 /* Update current procedure's array_outer_dependency flag, considering
3060 a call to procedure SYM. */
3063 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3065 /* Check to see if this is a sibling function that has not yet
3067 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3068 for (; sibling
; sibling
= sibling
->sibling
)
3070 if (sibling
->proc_name
== sym
)
3072 gfc_resolve (sibling
);
3077 /* If SYM has references to outer arrays, so has the procedure calling
3078 SYM. If SYM is a procedure pointer, we can assume the worst. */
3079 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3080 && gfc_current_ns
->proc_name
)
3081 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3085 /* Resolve a function call, which means resolving the arguments, then figuring
3086 out which entity the name refers to. */
3089 resolve_function (gfc_expr
*expr
)
3091 gfc_actual_arglist
*arg
;
3095 procedure_type p
= PROC_INTRINSIC
;
3096 bool no_formal_args
;
3100 sym
= expr
->symtree
->n
.sym
;
3102 /* If this is a procedure pointer component, it has already been resolved. */
3103 if (gfc_is_proc_ptr_comp (expr
))
3106 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3108 if (sym
&& sym
->attr
.intrinsic
3109 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3110 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3113 if (sym
&& sym
->attr
.intrinsic
3114 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3117 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3119 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3123 /* If this is a deferred TBP with an abstract interface (which may
3124 of course be referenced), expr->value.function.esym will be set. */
3125 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3127 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3128 sym
->name
, &expr
->where
);
3132 /* If this is a deferred TBP with an abstract interface, its result
3133 cannot be an assumed length character (F2003: C418). */
3134 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3135 && sym
->result
->ts
.u
.cl
3136 && sym
->result
->ts
.u
.cl
->length
== NULL
3137 && !sym
->result
->ts
.deferred
)
3139 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3140 "character length result (F2008: C418)", sym
->name
,
3145 /* Switch off assumed size checking and do this again for certain kinds
3146 of procedure, once the procedure itself is resolved. */
3147 need_full_assumed_size
++;
3149 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3150 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3152 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3153 inquiry_argument
= true;
3154 no_formal_args
= sym
&& is_external_proc (sym
)
3155 && gfc_sym_get_dummy_args (sym
) == NULL
;
3157 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3160 inquiry_argument
= false;
3164 inquiry_argument
= false;
3166 /* Resume assumed_size checking. */
3167 need_full_assumed_size
--;
3169 /* If the procedure is external, check for usage. */
3170 if (sym
&& is_external_proc (sym
))
3171 resolve_global_procedure (sym
, &expr
->where
,
3172 &expr
->value
.function
.actual
, 0);
3174 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3176 && sym
->ts
.u
.cl
->length
== NULL
3178 && !sym
->ts
.deferred
3179 && expr
->value
.function
.esym
== NULL
3180 && !sym
->attr
.contained
)
3182 /* Internal procedures are taken care of in resolve_contained_fntype. */
3183 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3184 "be used at %L since it is not a dummy argument",
3185 sym
->name
, &expr
->where
);
3189 /* See if function is already resolved. */
3191 if (expr
->value
.function
.name
!= NULL
3192 || expr
->value
.function
.isym
!= NULL
)
3194 if (expr
->ts
.type
== BT_UNKNOWN
)
3200 /* Apply the rules of section 14.1.2. */
3202 switch (procedure_kind (sym
))
3205 t
= resolve_generic_f (expr
);
3208 case PTYPE_SPECIFIC
:
3209 t
= resolve_specific_f (expr
);
3213 t
= resolve_unknown_f (expr
);
3217 gfc_internal_error ("resolve_function(): bad function type");
3221 /* If the expression is still a function (it might have simplified),
3222 then we check to see if we are calling an elemental function. */
3224 if (expr
->expr_type
!= EXPR_FUNCTION
)
3227 temp
= need_full_assumed_size
;
3228 need_full_assumed_size
= 0;
3230 if (!resolve_elemental_actual (expr
, NULL
))
3233 if (omp_workshare_flag
3234 && expr
->value
.function
.esym
3235 && ! gfc_elemental (expr
->value
.function
.esym
))
3237 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3238 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3243 #define GENERIC_ID expr->value.function.isym->id
3244 else if (expr
->value
.function
.actual
!= NULL
3245 && expr
->value
.function
.isym
!= NULL
3246 && GENERIC_ID
!= GFC_ISYM_LBOUND
3247 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3248 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3249 && GENERIC_ID
!= GFC_ISYM_LEN
3250 && GENERIC_ID
!= GFC_ISYM_LOC
3251 && GENERIC_ID
!= GFC_ISYM_C_LOC
3252 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3254 /* Array intrinsics must also have the last upper bound of an
3255 assumed size array argument. UBOUND and SIZE have to be
3256 excluded from the check if the second argument is anything
3259 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3261 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3262 && arg
== expr
->value
.function
.actual
3263 && arg
->next
!= NULL
&& arg
->next
->expr
)
3265 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3268 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3271 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3276 if (arg
->expr
!= NULL
3277 && arg
->expr
->rank
> 0
3278 && resolve_assumed_size_actual (arg
->expr
))
3284 need_full_assumed_size
= temp
;
3286 if (!check_pure_function(expr
))
3289 /* Functions without the RECURSIVE attribution are not allowed to
3290 * call themselves. */
3291 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3294 esym
= expr
->value
.function
.esym
;
3296 if (is_illegal_recursion (esym
, gfc_current_ns
))
3298 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3299 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3300 " function %qs is not RECURSIVE",
3301 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3303 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3304 " is not RECURSIVE", esym
->name
, &expr
->where
);
3310 /* Character lengths of use associated functions may contains references to
3311 symbols not referenced from the current program unit otherwise. Make sure
3312 those symbols are marked as referenced. */
3314 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3315 && expr
->value
.function
.esym
->attr
.use_assoc
)
3317 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3320 /* Make sure that the expression has a typespec that works. */
3321 if (expr
->ts
.type
== BT_UNKNOWN
)
3323 if (expr
->symtree
->n
.sym
->result
3324 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3325 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3326 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3329 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3331 if (expr
->value
.function
.esym
)
3332 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3334 update_current_proc_array_outer_dependency (sym
);
3337 /* typebound procedure: Assume the worst. */
3338 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3344 /************* Subroutine resolution *************/
3347 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3354 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3358 else if (gfc_do_concurrent_flag
)
3360 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3364 else if (gfc_pure (NULL
))
3366 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3370 gfc_unset_implicit_pure (NULL
);
3376 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3380 if (sym
->attr
.generic
)
3382 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3385 c
->resolved_sym
= s
;
3386 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3391 /* TODO: Need to search for elemental references in generic interface. */
3394 if (sym
->attr
.intrinsic
)
3395 return gfc_intrinsic_sub_interface (c
, 0);
3402 resolve_generic_s (gfc_code
*c
)
3407 sym
= c
->symtree
->n
.sym
;
3411 m
= resolve_generic_s0 (c
, sym
);
3414 else if (m
== MATCH_ERROR
)
3418 if (sym
->ns
->parent
== NULL
)
3420 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3424 if (!generic_sym (sym
))
3428 /* Last ditch attempt. See if the reference is to an intrinsic
3429 that possesses a matching interface. 14.1.2.4 */
3430 sym
= c
->symtree
->n
.sym
;
3432 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3434 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3435 sym
->name
, &c
->loc
);
3439 m
= gfc_intrinsic_sub_interface (c
, 0);
3443 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3444 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3450 /* Resolve a subroutine call known to be specific. */
3453 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3457 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3459 if (sym
->attr
.dummy
)
3461 sym
->attr
.proc
= PROC_DUMMY
;
3465 sym
->attr
.proc
= PROC_EXTERNAL
;
3469 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3472 if (sym
->attr
.intrinsic
)
3474 m
= gfc_intrinsic_sub_interface (c
, 1);
3478 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3479 "with an intrinsic", sym
->name
, &c
->loc
);
3487 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3489 c
->resolved_sym
= sym
;
3490 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3498 resolve_specific_s (gfc_code
*c
)
3503 sym
= c
->symtree
->n
.sym
;
3507 m
= resolve_specific_s0 (c
, sym
);
3510 if (m
== MATCH_ERROR
)
3513 if (sym
->ns
->parent
== NULL
)
3516 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3522 sym
= c
->symtree
->n
.sym
;
3523 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3524 sym
->name
, &c
->loc
);
3530 /* Resolve a subroutine call not known to be generic nor specific. */
3533 resolve_unknown_s (gfc_code
*c
)
3537 sym
= c
->symtree
->n
.sym
;
3539 if (sym
->attr
.dummy
)
3541 sym
->attr
.proc
= PROC_DUMMY
;
3545 /* See if we have an intrinsic function reference. */
3547 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3549 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3554 /* The reference is to an external name. */
3557 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3559 c
->resolved_sym
= sym
;
3561 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3565 /* Resolve a subroutine call. Although it was tempting to use the same code
3566 for functions, subroutines and functions are stored differently and this
3567 makes things awkward. */
3570 resolve_call (gfc_code
*c
)
3573 procedure_type ptype
= PROC_INTRINSIC
;
3574 gfc_symbol
*csym
, *sym
;
3575 bool no_formal_args
;
3577 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3579 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3581 gfc_error ("%qs at %L has a type, which is not consistent with "
3582 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3586 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3589 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3590 sym
= st
? st
->n
.sym
: NULL
;
3591 if (sym
&& csym
!= sym
3592 && sym
->ns
== gfc_current_ns
3593 && sym
->attr
.flavor
== FL_PROCEDURE
3594 && sym
->attr
.contained
)
3597 if (csym
->attr
.generic
)
3598 c
->symtree
->n
.sym
= sym
;
3601 csym
= c
->symtree
->n
.sym
;
3605 /* If this ia a deferred TBP, c->expr1 will be set. */
3606 if (!c
->expr1
&& csym
)
3608 if (csym
->attr
.abstract
)
3610 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3611 csym
->name
, &c
->loc
);
3615 /* Subroutines without the RECURSIVE attribution are not allowed to
3617 if (is_illegal_recursion (csym
, gfc_current_ns
))
3619 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3620 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3621 "as subroutine %qs is not RECURSIVE",
3622 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3624 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3625 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3631 /* Switch off assumed size checking and do this again for certain kinds
3632 of procedure, once the procedure itself is resolved. */
3633 need_full_assumed_size
++;
3636 ptype
= csym
->attr
.proc
;
3638 no_formal_args
= csym
&& is_external_proc (csym
)
3639 && gfc_sym_get_dummy_args (csym
) == NULL
;
3640 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3643 /* Resume assumed_size checking. */
3644 need_full_assumed_size
--;
3646 /* If external, check for usage. */
3647 if (csym
&& is_external_proc (csym
))
3648 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3651 if (c
->resolved_sym
== NULL
)
3653 c
->resolved_isym
= NULL
;
3654 switch (procedure_kind (csym
))
3657 t
= resolve_generic_s (c
);
3660 case PTYPE_SPECIFIC
:
3661 t
= resolve_specific_s (c
);
3665 t
= resolve_unknown_s (c
);
3669 gfc_internal_error ("resolve_subroutine(): bad function type");
3673 /* Some checks of elemental subroutine actual arguments. */
3674 if (!resolve_elemental_actual (NULL
, c
))
3678 update_current_proc_array_outer_dependency (csym
);
3680 /* Typebound procedure: Assume the worst. */
3681 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3687 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3688 op1->shape and op2->shape are non-NULL return true if their shapes
3689 match. If both op1->shape and op2->shape are non-NULL return false
3690 if their shapes do not match. If either op1->shape or op2->shape is
3691 NULL, return true. */
3694 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3701 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3703 for (i
= 0; i
< op1
->rank
; i
++)
3705 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3707 gfc_error ("Shapes for operands at %L and %L are not conformable",
3708 &op1
->where
, &op2
->where
);
3718 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3719 For example A .AND. B becomes IAND(A, B). */
3721 logical_to_bitwise (gfc_expr
*e
)
3723 gfc_expr
*tmp
, *op1
, *op2
;
3725 gfc_actual_arglist
*args
= NULL
;
3727 gcc_assert (e
->expr_type
== EXPR_OP
);
3729 isym
= GFC_ISYM_NONE
;
3730 op1
= e
->value
.op
.op1
;
3731 op2
= e
->value
.op
.op2
;
3733 switch (e
->value
.op
.op
)
3736 isym
= GFC_ISYM_NOT
;
3739 isym
= GFC_ISYM_IAND
;
3742 isym
= GFC_ISYM_IOR
;
3744 case INTRINSIC_NEQV
:
3745 isym
= GFC_ISYM_IEOR
;
3748 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3749 Change the old expression to NEQV, which will get replaced by IEOR,
3750 and wrap it in NOT. */
3751 tmp
= gfc_copy_expr (e
);
3752 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3753 tmp
= logical_to_bitwise (tmp
);
3754 isym
= GFC_ISYM_NOT
;
3759 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3762 /* Inherit the original operation's operands as arguments. */
3763 args
= gfc_get_actual_arglist ();
3767 args
->next
= gfc_get_actual_arglist ();
3768 args
->next
->expr
= op2
;
3771 /* Convert the expression to a function call. */
3772 e
->expr_type
= EXPR_FUNCTION
;
3773 e
->value
.function
.actual
= args
;
3774 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3775 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3776 e
->value
.function
.esym
= NULL
;
3778 /* Make up a pre-resolved function call symtree if we need to. */
3779 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3782 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3783 sym
= e
->symtree
->n
.sym
;
3785 sym
->attr
.flavor
= FL_PROCEDURE
;
3786 sym
->attr
.function
= 1;
3787 sym
->attr
.elemental
= 1;
3789 sym
->attr
.referenced
= 1;
3790 gfc_intrinsic_symbol (sym
);
3791 gfc_commit_symbol (sym
);
3794 args
->name
= e
->value
.function
.isym
->formal
->name
;
3795 if (e
->value
.function
.isym
->formal
->next
)
3796 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3801 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3802 candidates in CANDIDATES_LEN. */
3804 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3806 size_t &candidates_len
)
3813 /* Not sure how to properly filter here. Use all for a start.
3814 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3815 these as i suppose they don't make terribly sense. */
3817 if (uop
->n
.uop
->op
!= NULL
)
3818 vec_push (candidates
, candidates_len
, uop
->name
);
3822 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3826 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3829 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3832 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3834 char **candidates
= NULL
;
3835 size_t candidates_len
= 0;
3836 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3837 return gfc_closest_fuzzy_match (op
, candidates
);
3841 /* Callback finding an impure function as an operand to an .and. or
3842 .or. expression. Remember the last function warned about to
3843 avoid double warnings when recursing. */
3846 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3851 static gfc_expr
*last
= NULL
;
3852 bool *found
= (bool *) data
;
3854 if (f
->expr_type
== EXPR_FUNCTION
)
3857 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3858 && !gfc_implicit_pure_function (f
))
3861 gfc_warning (OPT_Wfunction_elimination
,
3862 "Impure function %qs at %L might not be evaluated",
3865 gfc_warning (OPT_Wfunction_elimination
,
3866 "Impure function at %L might not be evaluated",
3876 /* Resolve an operator expression node. This can involve replacing the
3877 operation with a user defined function call. */
3880 resolve_operator (gfc_expr
*e
)
3882 gfc_expr
*op1
, *op2
;
3884 bool dual_locus_error
;
3887 /* Resolve all subnodes-- give them types. */
3889 switch (e
->value
.op
.op
)
3892 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3898 case INTRINSIC_UPLUS
:
3899 case INTRINSIC_UMINUS
:
3900 case INTRINSIC_PARENTHESES
:
3901 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3906 /* Typecheck the new node. */
3908 op1
= e
->value
.op
.op1
;
3909 op2
= e
->value
.op
.op2
;
3910 dual_locus_error
= false;
3912 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3913 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3915 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3919 switch (e
->value
.op
.op
)
3921 case INTRINSIC_UPLUS
:
3922 case INTRINSIC_UMINUS
:
3923 if (op1
->ts
.type
== BT_INTEGER
3924 || op1
->ts
.type
== BT_REAL
3925 || op1
->ts
.type
== BT_COMPLEX
)
3931 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3932 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3935 case INTRINSIC_PLUS
:
3936 case INTRINSIC_MINUS
:
3937 case INTRINSIC_TIMES
:
3938 case INTRINSIC_DIVIDE
:
3939 case INTRINSIC_POWER
:
3940 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3942 gfc_type_convert_binary (e
, 1);
3946 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3948 _("Unexpected derived-type entities in binary intrinsic "
3949 "numeric operator %%<%s%%> at %%L"),
3950 gfc_op2string (e
->value
.op
.op
));
3953 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3954 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3955 gfc_typename (&op2
->ts
));
3958 case INTRINSIC_CONCAT
:
3959 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3960 && op1
->ts
.kind
== op2
->ts
.kind
)
3962 e
->ts
.type
= BT_CHARACTER
;
3963 e
->ts
.kind
= op1
->ts
.kind
;
3968 _("Operands of string concatenation operator at %%L are %s/%s"),
3969 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3975 case INTRINSIC_NEQV
:
3976 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3978 e
->ts
.type
= BT_LOGICAL
;
3979 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3980 if (op1
->ts
.kind
< e
->ts
.kind
)
3981 gfc_convert_type (op1
, &e
->ts
, 2);
3982 else if (op2
->ts
.kind
< e
->ts
.kind
)
3983 gfc_convert_type (op2
, &e
->ts
, 2);
3985 if (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
)
3987 /* Warn about short-circuiting
3988 with impure function as second operand. */
3990 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3995 /* Logical ops on integers become bitwise ops with -fdec. */
3997 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3999 e
->ts
.type
= BT_INTEGER
;
4000 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4001 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4002 gfc_convert_type (op1
, &e
->ts
, 1);
4003 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4004 gfc_convert_type (op2
, &e
->ts
, 1);
4005 e
= logical_to_bitwise (e
);
4006 return resolve_function (e
);
4009 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4010 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4011 gfc_typename (&op2
->ts
));
4016 /* Logical ops on integers become bitwise ops with -fdec. */
4017 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4019 e
->ts
.type
= BT_INTEGER
;
4020 e
->ts
.kind
= op1
->ts
.kind
;
4021 e
= logical_to_bitwise (e
);
4022 return resolve_function (e
);
4025 if (op1
->ts
.type
== BT_LOGICAL
)
4027 e
->ts
.type
= BT_LOGICAL
;
4028 e
->ts
.kind
= op1
->ts
.kind
;
4032 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4033 gfc_typename (&op1
->ts
));
4037 case INTRINSIC_GT_OS
:
4039 case INTRINSIC_GE_OS
:
4041 case INTRINSIC_LT_OS
:
4043 case INTRINSIC_LE_OS
:
4044 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4046 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4053 case INTRINSIC_EQ_OS
:
4055 case INTRINSIC_NE_OS
:
4056 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4057 && op1
->ts
.kind
== op2
->ts
.kind
)
4059 e
->ts
.type
= BT_LOGICAL
;
4060 e
->ts
.kind
= gfc_default_logical_kind
;
4064 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4066 gfc_type_convert_binary (e
, 1);
4068 e
->ts
.type
= BT_LOGICAL
;
4069 e
->ts
.kind
= gfc_default_logical_kind
;
4071 if (warn_compare_reals
)
4073 gfc_intrinsic_op op
= e
->value
.op
.op
;
4075 /* Type conversion has made sure that the types of op1 and op2
4076 agree, so it is only necessary to check the first one. */
4077 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4078 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4079 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4083 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4084 msg
= "Equality comparison for %s at %L";
4086 msg
= "Inequality comparison for %s at %L";
4088 gfc_warning (OPT_Wcompare_reals
, msg
,
4089 gfc_typename (&op1
->ts
), &op1
->where
);
4096 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4098 _("Logicals at %%L must be compared with %s instead of %s"),
4099 (e
->value
.op
.op
== INTRINSIC_EQ
4100 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4101 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4104 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4105 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4106 gfc_typename (&op2
->ts
));
4110 case INTRINSIC_USER
:
4111 if (e
->value
.op
.uop
->op
== NULL
)
4113 const char *name
= e
->value
.op
.uop
->name
;
4114 const char *guessed
;
4115 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4117 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4120 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4122 else if (op2
== NULL
)
4123 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4124 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4127 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4128 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4129 gfc_typename (&op2
->ts
));
4130 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4135 case INTRINSIC_PARENTHESES
:
4137 if (e
->ts
.type
== BT_CHARACTER
)
4138 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4142 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4145 /* Deal with arrayness of an operand through an operator. */
4149 switch (e
->value
.op
.op
)
4151 case INTRINSIC_PLUS
:
4152 case INTRINSIC_MINUS
:
4153 case INTRINSIC_TIMES
:
4154 case INTRINSIC_DIVIDE
:
4155 case INTRINSIC_POWER
:
4156 case INTRINSIC_CONCAT
:
4160 case INTRINSIC_NEQV
:
4162 case INTRINSIC_EQ_OS
:
4164 case INTRINSIC_NE_OS
:
4166 case INTRINSIC_GT_OS
:
4168 case INTRINSIC_GE_OS
:
4170 case INTRINSIC_LT_OS
:
4172 case INTRINSIC_LE_OS
:
4174 if (op1
->rank
== 0 && op2
->rank
== 0)
4177 if (op1
->rank
== 0 && op2
->rank
!= 0)
4179 e
->rank
= op2
->rank
;
4181 if (e
->shape
== NULL
)
4182 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4185 if (op1
->rank
!= 0 && op2
->rank
== 0)
4187 e
->rank
= op1
->rank
;
4189 if (e
->shape
== NULL
)
4190 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4193 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4195 if (op1
->rank
== op2
->rank
)
4197 e
->rank
= op1
->rank
;
4198 if (e
->shape
== NULL
)
4200 t
= compare_shapes (op1
, op2
);
4204 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4209 /* Allow higher level expressions to work. */
4212 /* Try user-defined operators, and otherwise throw an error. */
4213 dual_locus_error
= true;
4215 _("Inconsistent ranks for operator at %%L and %%L"));
4222 case INTRINSIC_PARENTHESES
:
4224 case INTRINSIC_UPLUS
:
4225 case INTRINSIC_UMINUS
:
4226 /* Simply copy arrayness attribute */
4227 e
->rank
= op1
->rank
;
4229 if (e
->shape
== NULL
)
4230 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4238 /* Attempt to simplify the expression. */
4241 t
= gfc_simplify_expr (e
, 0);
4242 /* Some calls do not succeed in simplification and return false
4243 even though there is no error; e.g. variable references to
4244 PARAMETER arrays. */
4245 if (!gfc_is_constant_expr (e
))
4253 match m
= gfc_extend_expr (e
);
4256 if (m
== MATCH_ERROR
)
4260 if (dual_locus_error
)
4261 gfc_error (msg
, &op1
->where
, &op2
->where
);
4263 gfc_error (msg
, &e
->where
);
4269 /************** Array resolution subroutines **************/
4272 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4274 /* Compare two integer expressions. */
4276 static compare_result
4277 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4281 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4282 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4285 /* If either of the types isn't INTEGER, we must have
4286 raised an error earlier. */
4288 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4291 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4301 /* Compare an integer expression with an integer. */
4303 static compare_result
4304 compare_bound_int (gfc_expr
*a
, int b
)
4308 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4311 if (a
->ts
.type
!= BT_INTEGER
)
4312 gfc_internal_error ("compare_bound_int(): Bad expression");
4314 i
= mpz_cmp_si (a
->value
.integer
, b
);
4324 /* Compare an integer expression with a mpz_t. */
4326 static compare_result
4327 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4331 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4334 if (a
->ts
.type
!= BT_INTEGER
)
4335 gfc_internal_error ("compare_bound_int(): Bad expression");
4337 i
= mpz_cmp (a
->value
.integer
, b
);
4347 /* Compute the last value of a sequence given by a triplet.
4348 Return 0 if it wasn't able to compute the last value, or if the
4349 sequence if empty, and 1 otherwise. */
4352 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4353 gfc_expr
*stride
, mpz_t last
)
4357 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4358 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4359 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4362 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4363 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4366 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4368 if (compare_bound (start
, end
) == CMP_GT
)
4370 mpz_set (last
, end
->value
.integer
);
4374 if (compare_bound_int (stride
, 0) == CMP_GT
)
4376 /* Stride is positive */
4377 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4382 /* Stride is negative */
4383 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4388 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4389 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4390 mpz_sub (last
, end
->value
.integer
, rem
);
4397 /* Compare a single dimension of an array reference to the array
4401 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4405 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4407 gcc_assert (ar
->stride
[i
] == NULL
);
4408 /* This implies [*] as [*:] and [*:3] are not possible. */
4409 if (ar
->start
[i
] == NULL
)
4411 gcc_assert (ar
->end
[i
] == NULL
);
4416 /* Given start, end and stride values, calculate the minimum and
4417 maximum referenced indexes. */
4419 switch (ar
->dimen_type
[i
])
4422 case DIMEN_THIS_IMAGE
:
4427 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4430 gfc_warning (0, "Array reference at %L is out of bounds "
4431 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4432 mpz_get_si (ar
->start
[i
]->value
.integer
),
4433 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4435 gfc_warning (0, "Array reference at %L is out of bounds "
4436 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4437 mpz_get_si (ar
->start
[i
]->value
.integer
),
4438 mpz_get_si (as
->lower
[i
]->value
.integer
),
4442 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4445 gfc_warning (0, "Array reference at %L is out of bounds "
4446 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4447 mpz_get_si (ar
->start
[i
]->value
.integer
),
4448 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4450 gfc_warning (0, "Array reference at %L is out of bounds "
4451 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4452 mpz_get_si (ar
->start
[i
]->value
.integer
),
4453 mpz_get_si (as
->upper
[i
]->value
.integer
),
4462 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4463 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4465 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4467 /* Check for zero stride, which is not allowed. */
4468 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4470 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4474 /* if start == len || (stride > 0 && start < len)
4475 || (stride < 0 && start > len),
4476 then the array section contains at least one element. In this
4477 case, there is an out-of-bounds access if
4478 (start < lower || start > upper). */
4479 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4480 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4481 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4482 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4483 && comp_start_end
== CMP_GT
))
4485 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4487 gfc_warning (0, "Lower array reference at %L is out of bounds "
4488 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4489 mpz_get_si (AR_START
->value
.integer
),
4490 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4493 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4495 gfc_warning (0, "Lower array reference at %L is out of bounds "
4496 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4497 mpz_get_si (AR_START
->value
.integer
),
4498 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4503 /* If we can compute the highest index of the array section,
4504 then it also has to be between lower and upper. */
4505 mpz_init (last_value
);
4506 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4509 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4511 gfc_warning (0, "Upper array reference at %L is out of bounds "
4512 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4513 mpz_get_si (last_value
),
4514 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4515 mpz_clear (last_value
);
4518 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4520 gfc_warning (0, "Upper array reference at %L is out of bounds "
4521 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4522 mpz_get_si (last_value
),
4523 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4524 mpz_clear (last_value
);
4528 mpz_clear (last_value
);
4536 gfc_internal_error ("check_dimension(): Bad array reference");
4543 /* Compare an array reference with an array specification. */
4546 compare_spec_to_ref (gfc_array_ref
*ar
)
4553 /* TODO: Full array sections are only allowed as actual parameters. */
4554 if (as
->type
== AS_ASSUMED_SIZE
4555 && (/*ar->type == AR_FULL
4556 ||*/ (ar
->type
== AR_SECTION
4557 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4559 gfc_error ("Rightmost upper bound of assumed size array section "
4560 "not specified at %L", &ar
->where
);
4564 if (ar
->type
== AR_FULL
)
4567 if (as
->rank
!= ar
->dimen
)
4569 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4570 &ar
->where
, ar
->dimen
, as
->rank
);
4574 /* ar->codimen == 0 is a local array. */
4575 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4577 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4578 &ar
->where
, ar
->codimen
, as
->corank
);
4582 for (i
= 0; i
< as
->rank
; i
++)
4583 if (!check_dimension (i
, ar
, as
))
4586 /* Local access has no coarray spec. */
4587 if (ar
->codimen
!= 0)
4588 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4590 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4591 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4593 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4594 i
+ 1 - as
->rank
, &ar
->where
);
4597 if (!check_dimension (i
, ar
, as
))
4605 /* Resolve one part of an array index. */
4608 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4609 int force_index_integer_kind
)
4616 if (!gfc_resolve_expr (index
))
4619 if (check_scalar
&& index
->rank
!= 0)
4621 gfc_error ("Array index at %L must be scalar", &index
->where
);
4625 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4627 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4628 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4632 if (index
->ts
.type
== BT_REAL
)
4633 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4637 if ((index
->ts
.kind
!= gfc_index_integer_kind
4638 && force_index_integer_kind
)
4639 || index
->ts
.type
!= BT_INTEGER
)
4642 ts
.type
= BT_INTEGER
;
4643 ts
.kind
= gfc_index_integer_kind
;
4645 gfc_convert_type_warn (index
, &ts
, 2, 0);
4651 /* Resolve one part of an array index. */
4654 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4656 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4659 /* Resolve a dim argument to an intrinsic function. */
4662 gfc_resolve_dim_arg (gfc_expr
*dim
)
4667 if (!gfc_resolve_expr (dim
))
4672 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4677 if (dim
->ts
.type
!= BT_INTEGER
)
4679 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4683 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4688 ts
.type
= BT_INTEGER
;
4689 ts
.kind
= gfc_index_integer_kind
;
4691 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4697 /* Given an expression that contains array references, update those array
4698 references to point to the right array specifications. While this is
4699 filled in during matching, this information is difficult to save and load
4700 in a module, so we take care of it here.
4702 The idea here is that the original array reference comes from the
4703 base symbol. We traverse the list of reference structures, setting
4704 the stored reference to references. Component references can
4705 provide an additional array specification. */
4708 find_array_spec (gfc_expr
*e
)
4714 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4715 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4717 as
= e
->symtree
->n
.sym
->as
;
4719 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4724 gfc_internal_error ("find_array_spec(): Missing spec");
4731 c
= ref
->u
.c
.component
;
4732 if (c
->attr
.dimension
)
4735 gfc_internal_error ("find_array_spec(): unused as(1)");
4746 gfc_internal_error ("find_array_spec(): unused as(2)");
4750 /* Resolve an array reference. */
4753 resolve_array_ref (gfc_array_ref
*ar
)
4755 int i
, check_scalar
;
4758 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4760 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4762 /* Do not force gfc_index_integer_kind for the start. We can
4763 do fine with any integer kind. This avoids temporary arrays
4764 created for indexing with a vector. */
4765 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4767 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4769 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4774 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4778 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4782 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4783 if (e
->expr_type
== EXPR_VARIABLE
4784 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4785 ar
->start
[i
] = gfc_get_parentheses (e
);
4789 gfc_error ("Array index at %L is an array of rank %d",
4790 &ar
->c_where
[i
], e
->rank
);
4794 /* Fill in the upper bound, which may be lower than the
4795 specified one for something like a(2:10:5), which is
4796 identical to a(2:7:5). Only relevant for strides not equal
4797 to one. Don't try a division by zero. */
4798 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4799 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4800 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4805 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4807 if (ar
->end
[i
] == NULL
)
4810 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4812 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4814 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4815 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4817 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4828 if (ar
->type
== AR_FULL
)
4830 if (ar
->as
->rank
== 0)
4831 ar
->type
= AR_ELEMENT
;
4833 /* Make sure array is the same as array(:,:), this way
4834 we don't need to special case all the time. */
4835 ar
->dimen
= ar
->as
->rank
;
4836 for (i
= 0; i
< ar
->dimen
; i
++)
4838 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4840 gcc_assert (ar
->start
[i
] == NULL
);
4841 gcc_assert (ar
->end
[i
] == NULL
);
4842 gcc_assert (ar
->stride
[i
] == NULL
);
4846 /* If the reference type is unknown, figure out what kind it is. */
4848 if (ar
->type
== AR_UNKNOWN
)
4850 ar
->type
= AR_ELEMENT
;
4851 for (i
= 0; i
< ar
->dimen
; i
++)
4852 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4853 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4855 ar
->type
= AR_SECTION
;
4860 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4863 if (ar
->as
->corank
&& ar
->codimen
== 0)
4866 ar
->codimen
= ar
->as
->corank
;
4867 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4868 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4876 resolve_substring (gfc_ref
*ref
)
4878 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4880 if (ref
->u
.ss
.start
!= NULL
)
4882 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4885 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4887 gfc_error ("Substring start index at %L must be of type INTEGER",
4888 &ref
->u
.ss
.start
->where
);
4892 if (ref
->u
.ss
.start
->rank
!= 0)
4894 gfc_error ("Substring start index at %L must be scalar",
4895 &ref
->u
.ss
.start
->where
);
4899 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4900 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4901 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4903 gfc_error ("Substring start index at %L is less than one",
4904 &ref
->u
.ss
.start
->where
);
4909 if (ref
->u
.ss
.end
!= NULL
)
4911 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4914 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4916 gfc_error ("Substring end index at %L must be of type INTEGER",
4917 &ref
->u
.ss
.end
->where
);
4921 if (ref
->u
.ss
.end
->rank
!= 0)
4923 gfc_error ("Substring end index at %L must be scalar",
4924 &ref
->u
.ss
.end
->where
);
4928 if (ref
->u
.ss
.length
!= NULL
4929 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4930 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4931 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4933 gfc_error ("Substring end index at %L exceeds the string length",
4934 &ref
->u
.ss
.start
->where
);
4938 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4939 gfc_integer_kinds
[k
].huge
) == CMP_GT
4940 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4941 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4943 gfc_error ("Substring end index at %L is too large",
4944 &ref
->u
.ss
.end
->where
);
4953 /* This function supplies missing substring charlens. */
4956 gfc_resolve_substring_charlen (gfc_expr
*e
)
4959 gfc_expr
*start
, *end
;
4960 gfc_typespec
*ts
= NULL
;
4962 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4964 if (char_ref
->type
== REF_SUBSTRING
)
4966 if (char_ref
->type
== REF_COMPONENT
)
4967 ts
= &char_ref
->u
.c
.component
->ts
;
4973 gcc_assert (char_ref
->next
== NULL
);
4977 if (e
->ts
.u
.cl
->length
)
4978 gfc_free_expr (e
->ts
.u
.cl
->length
);
4979 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4983 e
->ts
.type
= BT_CHARACTER
;
4984 e
->ts
.kind
= gfc_default_character_kind
;
4987 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4989 if (char_ref
->u
.ss
.start
)
4990 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4992 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4994 if (char_ref
->u
.ss
.end
)
4995 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4996 else if (e
->expr_type
== EXPR_VARIABLE
)
4999 ts
= &e
->symtree
->n
.sym
->ts
;
5000 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5007 gfc_free_expr (start
);
5008 gfc_free_expr (end
);
5012 /* Length = (end - start + 1). */
5013 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5014 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5015 gfc_get_int_expr (gfc_charlen_int_kind
,
5018 /* F2008, 6.4.1: Both the starting point and the ending point shall
5019 be within the range 1, 2, ..., n unless the starting point exceeds
5020 the ending point, in which case the substring has length zero. */
5022 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5023 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5025 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5026 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5028 /* Make sure that the length is simplified. */
5029 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5030 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5034 /* Resolve subtype references. */
5037 resolve_ref (gfc_expr
*expr
)
5039 int current_part_dimension
, n_components
, seen_part_dimension
;
5042 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5043 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5045 find_array_spec (expr
);
5049 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5053 if (!resolve_array_ref (&ref
->u
.ar
))
5061 if (!resolve_substring (ref
))
5066 /* Check constraints on part references. */
5068 current_part_dimension
= 0;
5069 seen_part_dimension
= 0;
5072 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5077 switch (ref
->u
.ar
.type
)
5080 /* Coarray scalar. */
5081 if (ref
->u
.ar
.as
->rank
== 0)
5083 current_part_dimension
= 0;
5088 current_part_dimension
= 1;
5092 current_part_dimension
= 0;
5096 gfc_internal_error ("resolve_ref(): Bad array reference");
5102 if (current_part_dimension
|| seen_part_dimension
)
5105 if (ref
->u
.c
.component
->attr
.pointer
5106 || ref
->u
.c
.component
->attr
.proc_pointer
5107 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5108 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5110 gfc_error ("Component to the right of a part reference "
5111 "with nonzero rank must not have the POINTER "
5112 "attribute at %L", &expr
->where
);
5115 else if (ref
->u
.c
.component
->attr
.allocatable
5116 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5117 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5120 gfc_error ("Component to the right of a part reference "
5121 "with nonzero rank must not have the ALLOCATABLE "
5122 "attribute at %L", &expr
->where
);
5134 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5135 || ref
->next
== NULL
)
5136 && current_part_dimension
5137 && seen_part_dimension
)
5139 gfc_error ("Two or more part references with nonzero rank must "
5140 "not be specified at %L", &expr
->where
);
5144 if (ref
->type
== REF_COMPONENT
)
5146 if (current_part_dimension
)
5147 seen_part_dimension
= 1;
5149 /* reset to make sure */
5150 current_part_dimension
= 0;
5158 /* Given an expression, determine its shape. This is easier than it sounds.
5159 Leaves the shape array NULL if it is not possible to determine the shape. */
5162 expression_shape (gfc_expr
*e
)
5164 mpz_t array
[GFC_MAX_DIMENSIONS
];
5167 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5170 for (i
= 0; i
< e
->rank
; i
++)
5171 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5174 e
->shape
= gfc_get_shape (e
->rank
);
5176 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5181 for (i
--; i
>= 0; i
--)
5182 mpz_clear (array
[i
]);
5186 /* Given a variable expression node, compute the rank of the expression by
5187 examining the base symbol and any reference structures it may have. */
5190 expression_rank (gfc_expr
*e
)
5195 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5196 could lead to serious confusion... */
5197 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5201 if (e
->expr_type
== EXPR_ARRAY
)
5203 /* Constructors can have a rank different from one via RESHAPE(). */
5205 if (e
->symtree
== NULL
)
5211 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5212 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5218 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5220 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5221 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5222 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5224 if (ref
->type
!= REF_ARRAY
)
5227 if (ref
->u
.ar
.type
== AR_FULL
)
5229 rank
= ref
->u
.ar
.as
->rank
;
5233 if (ref
->u
.ar
.type
== AR_SECTION
)
5235 /* Figure out the rank of the section. */
5237 gfc_internal_error ("expression_rank(): Two array specs");
5239 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5240 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5241 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5251 expression_shape (e
);
5256 add_caf_get_intrinsic (gfc_expr
*e
)
5258 gfc_expr
*wrapper
, *tmp_expr
;
5262 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5263 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5268 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5269 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5272 tmp_expr
= XCNEW (gfc_expr
);
5274 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5275 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5276 wrapper
->ts
= e
->ts
;
5277 wrapper
->rank
= e
->rank
;
5279 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5286 remove_caf_get_intrinsic (gfc_expr
*e
)
5288 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5289 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5290 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5291 e
->value
.function
.actual
->expr
= NULL
;
5292 gfc_free_actual_arglist (e
->value
.function
.actual
);
5293 gfc_free_shape (&e
->shape
, e
->rank
);
5299 /* Resolve a variable expression. */
5302 resolve_variable (gfc_expr
*e
)
5309 if (e
->symtree
== NULL
)
5311 sym
= e
->symtree
->n
.sym
;
5313 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5314 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5315 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5317 if (!actual_arg
|| inquiry_argument
)
5319 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5320 "be used as actual argument", sym
->name
, &e
->where
);
5324 /* TS 29113, 407b. */
5325 else if (e
->ts
.type
== BT_ASSUMED
)
5329 gfc_error ("Assumed-type variable %s at %L may only be used "
5330 "as actual argument", sym
->name
, &e
->where
);
5333 else if (inquiry_argument
&& !first_actual_arg
)
5335 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5336 for all inquiry functions in resolve_function; the reason is
5337 that the function-name resolution happens too late in that
5339 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5340 "an inquiry function shall be the first argument",
5341 sym
->name
, &e
->where
);
5345 /* TS 29113, C535b. */
5346 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5347 && CLASS_DATA (sym
)->as
5348 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5349 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5350 && sym
->as
->type
== AS_ASSUMED_RANK
))
5354 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5355 "actual argument", sym
->name
, &e
->where
);
5358 else if (inquiry_argument
&& !first_actual_arg
)
5360 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5361 for all inquiry functions in resolve_function; the reason is
5362 that the function-name resolution happens too late in that
5364 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5365 "to an inquiry function shall be the first argument",
5366 sym
->name
, &e
->where
);
5371 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5372 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5373 && e
->ref
->next
== NULL
))
5375 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5376 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5379 /* TS 29113, 407b. */
5380 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5381 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5382 && e
->ref
->next
== NULL
))
5384 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5385 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5389 /* TS 29113, C535b. */
5390 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5391 && CLASS_DATA (sym
)->as
5392 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5393 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5394 && sym
->as
->type
== AS_ASSUMED_RANK
))
5396 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5397 && e
->ref
->next
== NULL
))
5399 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5400 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5404 /* For variables that are used in an associate (target => object) where
5405 the object's basetype is array valued while the target is scalar,
5406 the ts' type of the component refs is still array valued, which
5407 can't be translated that way. */
5408 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5409 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5410 && CLASS_DATA (sym
->assoc
->target
)->as
)
5412 gfc_ref
*ref
= e
->ref
;
5418 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5419 /* Stop the loop. */
5429 /* If this is an associate-name, it may be parsed with an array reference
5430 in error even though the target is scalar. Fail directly in this case.
5431 TODO Understand why class scalar expressions must be excluded. */
5432 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5434 if (sym
->ts
.type
== BT_CLASS
)
5435 gfc_fix_class_refs (e
);
5436 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5440 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5441 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5443 /* On the other hand, the parser may not have known this is an array;
5444 in this case, we have to add a FULL reference. */
5445 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5447 e
->ref
= gfc_get_ref ();
5448 e
->ref
->type
= REF_ARRAY
;
5449 e
->ref
->u
.ar
.type
= AR_FULL
;
5450 e
->ref
->u
.ar
.dimen
= 0;
5453 /* Like above, but for class types, where the checking whether an array
5454 ref is present is more complicated. Furthermore make sure not to add
5455 the full array ref to _vptr or _len refs. */
5456 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5457 && CLASS_DATA (sym
)->attr
.dimension
5458 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5460 gfc_ref
*ref
, *newref
;
5462 newref
= gfc_get_ref ();
5463 newref
->type
= REF_ARRAY
;
5464 newref
->u
.ar
.type
= AR_FULL
;
5465 newref
->u
.ar
.dimen
= 0;
5466 /* Because this is an associate var and the first ref either is a ref to
5467 the _data component or not, no traversal of the ref chain is
5468 needed. The array ref needs to be inserted after the _data ref,
5469 or when that is not present, which may happend for polymorphic
5470 types, then at the first position. */
5474 else if (ref
->type
== REF_COMPONENT
5475 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5477 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5479 newref
->next
= ref
->next
;
5483 /* Array ref present already. */
5484 gfc_free_ref_list (newref
);
5486 else if (ref
->type
== REF_ARRAY
)
5487 /* Array ref present already. */
5488 gfc_free_ref_list (newref
);
5496 if (e
->ref
&& !resolve_ref (e
))
5499 if (sym
->attr
.flavor
== FL_PROCEDURE
5500 && (!sym
->attr
.function
5501 || (sym
->attr
.function
&& sym
->result
5502 && sym
->result
->attr
.proc_pointer
5503 && !sym
->result
->attr
.function
)))
5505 e
->ts
.type
= BT_PROCEDURE
;
5506 goto resolve_procedure
;
5509 if (sym
->ts
.type
!= BT_UNKNOWN
)
5510 gfc_variable_attr (e
, &e
->ts
);
5511 else if (sym
->attr
.flavor
== FL_PROCEDURE
5512 && sym
->attr
.function
&& sym
->result
5513 && sym
->result
->ts
.type
!= BT_UNKNOWN
5514 && sym
->result
->attr
.proc_pointer
)
5515 e
->ts
= sym
->result
->ts
;
5518 /* Must be a simple variable reference. */
5519 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5524 if (check_assumed_size_reference (sym
, e
))
5527 /* Deal with forward references to entries during gfc_resolve_code, to
5528 satisfy, at least partially, 12.5.2.5. */
5529 if (gfc_current_ns
->entries
5530 && current_entry_id
== sym
->entry_id
5533 && cs_base
->current
->op
!= EXEC_ENTRY
)
5535 gfc_entry_list
*entry
;
5536 gfc_formal_arglist
*formal
;
5538 bool seen
, saved_specification_expr
;
5540 /* If the symbol is a dummy... */
5541 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5543 entry
= gfc_current_ns
->entries
;
5546 /* ...test if the symbol is a parameter of previous entries. */
5547 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5548 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5550 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5557 /* If it has not been seen as a dummy, this is an error. */
5560 if (specification_expr
)
5561 gfc_error ("Variable %qs, used in a specification expression"
5562 ", is referenced at %L before the ENTRY statement "
5563 "in which it is a parameter",
5564 sym
->name
, &cs_base
->current
->loc
);
5566 gfc_error ("Variable %qs is used at %L before the ENTRY "
5567 "statement in which it is a parameter",
5568 sym
->name
, &cs_base
->current
->loc
);
5573 /* Now do the same check on the specification expressions. */
5574 saved_specification_expr
= specification_expr
;
5575 specification_expr
= true;
5576 if (sym
->ts
.type
== BT_CHARACTER
5577 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5581 for (n
= 0; n
< sym
->as
->rank
; n
++)
5583 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5585 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5588 specification_expr
= saved_specification_expr
;
5591 /* Update the symbol's entry level. */
5592 sym
->entry_id
= current_entry_id
+ 1;
5595 /* If a symbol has been host_associated mark it. This is used latter,
5596 to identify if aliasing is possible via host association. */
5597 if (sym
->attr
.flavor
== FL_VARIABLE
5598 && gfc_current_ns
->parent
5599 && (gfc_current_ns
->parent
== sym
->ns
5600 || (gfc_current_ns
->parent
->parent
5601 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5602 sym
->attr
.host_assoc
= 1;
5604 if (gfc_current_ns
->proc_name
5605 && sym
->attr
.dimension
5606 && (sym
->ns
!= gfc_current_ns
5607 || sym
->attr
.use_assoc
5608 || sym
->attr
.in_common
))
5609 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5612 if (t
&& !resolve_procedure_expression (e
))
5615 /* F2008, C617 and C1229. */
5616 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5617 && gfc_is_coindexed (e
))
5619 gfc_ref
*ref
, *ref2
= NULL
;
5621 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5623 if (ref
->type
== REF_COMPONENT
)
5625 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5629 for ( ; ref
; ref
= ref
->next
)
5630 if (ref
->type
== REF_COMPONENT
)
5633 /* Expression itself is not coindexed object. */
5634 if (ref
&& e
->ts
.type
== BT_CLASS
)
5636 gfc_error ("Polymorphic subobject of coindexed object at %L",
5641 /* Expression itself is coindexed object. */
5645 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5646 for ( ; c
; c
= c
->next
)
5647 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5649 gfc_error ("Coindexed object with polymorphic allocatable "
5650 "subcomponent at %L", &e
->where
);
5658 expression_rank (e
);
5660 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5661 add_caf_get_intrinsic (e
);
5663 /* Simplify cases where access to a parameter array results in a
5664 single constant. Suppress errors since those will have been
5665 issued before, as warnings. */
5666 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5668 gfc_push_suppress_errors ();
5669 gfc_simplify_expr (e
, 1);
5670 gfc_pop_suppress_errors ();
5677 /* Checks to see that the correct symbol has been host associated.
5678 The only situation where this arises is that in which a twice
5679 contained function is parsed after the host association is made.
5680 Therefore, on detecting this, change the symbol in the expression
5681 and convert the array reference into an actual arglist if the old
5682 symbol is a variable. */
5684 check_host_association (gfc_expr
*e
)
5686 gfc_symbol
*sym
, *old_sym
;
5690 gfc_actual_arglist
*arg
, *tail
= NULL
;
5691 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5693 /* If the expression is the result of substitution in
5694 interface.c(gfc_extend_expr) because there is no way in
5695 which the host association can be wrong. */
5696 if (e
->symtree
== NULL
5697 || e
->symtree
->n
.sym
== NULL
5698 || e
->user_operator
)
5701 old_sym
= e
->symtree
->n
.sym
;
5703 if (gfc_current_ns
->parent
5704 && old_sym
->ns
!= gfc_current_ns
)
5706 /* Use the 'USE' name so that renamed module symbols are
5707 correctly handled. */
5708 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5710 if (sym
&& old_sym
!= sym
5711 && sym
->ts
.type
== old_sym
->ts
.type
5712 && sym
->attr
.flavor
== FL_PROCEDURE
5713 && sym
->attr
.contained
)
5715 /* Clear the shape, since it might not be valid. */
5716 gfc_free_shape (&e
->shape
, e
->rank
);
5718 /* Give the expression the right symtree! */
5719 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5720 gcc_assert (st
!= NULL
);
5722 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5723 || e
->expr_type
== EXPR_FUNCTION
)
5725 /* Original was function so point to the new symbol, since
5726 the actual argument list is already attached to the
5728 e
->value
.function
.esym
= NULL
;
5733 /* Original was variable so convert array references into
5734 an actual arglist. This does not need any checking now
5735 since resolve_function will take care of it. */
5736 e
->value
.function
.actual
= NULL
;
5737 e
->expr_type
= EXPR_FUNCTION
;
5740 /* Ambiguity will not arise if the array reference is not
5741 the last reference. */
5742 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5743 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5746 gcc_assert (ref
->type
== REF_ARRAY
);
5748 /* Grab the start expressions from the array ref and
5749 copy them into actual arguments. */
5750 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5752 arg
= gfc_get_actual_arglist ();
5753 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5754 if (e
->value
.function
.actual
== NULL
)
5755 tail
= e
->value
.function
.actual
= arg
;
5763 /* Dump the reference list and set the rank. */
5764 gfc_free_ref_list (e
->ref
);
5766 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5769 gfc_resolve_expr (e
);
5773 /* This might have changed! */
5774 return e
->expr_type
== EXPR_FUNCTION
;
5779 gfc_resolve_character_operator (gfc_expr
*e
)
5781 gfc_expr
*op1
= e
->value
.op
.op1
;
5782 gfc_expr
*op2
= e
->value
.op
.op2
;
5783 gfc_expr
*e1
= NULL
;
5784 gfc_expr
*e2
= NULL
;
5786 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5788 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5789 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5790 else if (op1
->expr_type
== EXPR_CONSTANT
)
5791 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5792 op1
->value
.character
.length
);
5794 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5795 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5796 else if (op2
->expr_type
== EXPR_CONSTANT
)
5797 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5798 op2
->value
.character
.length
);
5800 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5810 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5811 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5812 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5813 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5814 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5820 /* Ensure that an character expression has a charlen and, if possible, a
5821 length expression. */
5824 fixup_charlen (gfc_expr
*e
)
5826 /* The cases fall through so that changes in expression type and the need
5827 for multiple fixes are picked up. In all circumstances, a charlen should
5828 be available for the middle end to hang a backend_decl on. */
5829 switch (e
->expr_type
)
5832 gfc_resolve_character_operator (e
);
5836 if (e
->expr_type
== EXPR_ARRAY
)
5837 gfc_resolve_character_array_constructor (e
);
5840 case EXPR_SUBSTRING
:
5841 if (!e
->ts
.u
.cl
&& e
->ref
)
5842 gfc_resolve_substring_charlen (e
);
5847 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5854 /* Update an actual argument to include the passed-object for type-bound
5855 procedures at the right position. */
5857 static gfc_actual_arglist
*
5858 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5861 gcc_assert (argpos
> 0);
5865 gfc_actual_arglist
* result
;
5867 result
= gfc_get_actual_arglist ();
5871 result
->name
= name
;
5877 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5879 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5884 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5887 extract_compcall_passed_object (gfc_expr
* e
)
5891 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5893 if (e
->value
.compcall
.base_object
)
5894 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5897 po
= gfc_get_expr ();
5898 po
->expr_type
= EXPR_VARIABLE
;
5899 po
->symtree
= e
->symtree
;
5900 po
->ref
= gfc_copy_ref (e
->ref
);
5901 po
->where
= e
->where
;
5904 if (!gfc_resolve_expr (po
))
5911 /* Update the arglist of an EXPR_COMPCALL expression to include the
5915 update_compcall_arglist (gfc_expr
* e
)
5918 gfc_typebound_proc
* tbp
;
5920 tbp
= e
->value
.compcall
.tbp
;
5925 po
= extract_compcall_passed_object (e
);
5929 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5935 if (tbp
->pass_arg_num
<= 0)
5938 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5946 /* Extract the passed object from a PPC call (a copy of it). */
5949 extract_ppc_passed_object (gfc_expr
*e
)
5954 po
= gfc_get_expr ();
5955 po
->expr_type
= EXPR_VARIABLE
;
5956 po
->symtree
= e
->symtree
;
5957 po
->ref
= gfc_copy_ref (e
->ref
);
5958 po
->where
= e
->where
;
5960 /* Remove PPC reference. */
5962 while ((*ref
)->next
)
5963 ref
= &(*ref
)->next
;
5964 gfc_free_ref_list (*ref
);
5967 if (!gfc_resolve_expr (po
))
5974 /* Update the actual arglist of a procedure pointer component to include the
5978 update_ppc_arglist (gfc_expr
* e
)
5982 gfc_typebound_proc
* tb
;
5984 ppc
= gfc_get_proc_ptr_comp (e
);
5992 else if (tb
->nopass
)
5995 po
= extract_ppc_passed_object (e
);
6002 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6007 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6009 gfc_error ("Base object for procedure-pointer component call at %L is of"
6010 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6014 gcc_assert (tb
->pass_arg_num
> 0);
6015 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6023 /* Check that the object a TBP is called on is valid, i.e. it must not be
6024 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6027 check_typebound_baseobject (gfc_expr
* e
)
6030 bool return_value
= false;
6032 base
= extract_compcall_passed_object (e
);
6036 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6038 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6042 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6044 gfc_error ("Base object for type-bound procedure call at %L is of"
6045 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6049 /* F08:C1230. If the procedure called is NOPASS,
6050 the base object must be scalar. */
6051 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6053 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6054 " be scalar", &e
->where
);
6058 return_value
= true;
6061 gfc_free_expr (base
);
6062 return return_value
;
6066 /* Resolve a call to a type-bound procedure, either function or subroutine,
6067 statically from the data in an EXPR_COMPCALL expression. The adapted
6068 arglist and the target-procedure symtree are returned. */
6071 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6072 gfc_actual_arglist
** actual
)
6074 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6075 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6077 /* Update the actual arglist for PASS. */
6078 if (!update_compcall_arglist (e
))
6081 *actual
= e
->value
.compcall
.actual
;
6082 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6084 gfc_free_ref_list (e
->ref
);
6086 e
->value
.compcall
.actual
= NULL
;
6088 /* If we find a deferred typebound procedure, check for derived types
6089 that an overriding typebound procedure has not been missed. */
6090 if (e
->value
.compcall
.name
6091 && !e
->value
.compcall
.tbp
->non_overridable
6092 && e
->value
.compcall
.base_object
6093 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6096 gfc_symbol
*derived
;
6098 /* Use the derived type of the base_object. */
6099 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6102 /* If necessary, go through the inheritance chain. */
6103 while (!st
&& derived
)
6105 /* Look for the typebound procedure 'name'. */
6106 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6107 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6108 e
->value
.compcall
.name
);
6110 derived
= gfc_get_derived_super_type (derived
);
6113 /* Now find the specific name in the derived type namespace. */
6114 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6115 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6116 derived
->ns
, 1, &st
);
6124 /* Get the ultimate declared type from an expression. In addition,
6125 return the last class/derived type reference and the copy of the
6126 reference list. If check_types is set true, derived types are
6127 identified as well as class references. */
6129 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6130 gfc_expr
*e
, bool check_types
)
6132 gfc_symbol
*declared
;
6139 *new_ref
= gfc_copy_ref (e
->ref
);
6141 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6143 if (ref
->type
!= REF_COMPONENT
)
6146 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6147 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6148 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6150 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6156 if (declared
== NULL
)
6157 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6163 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6164 which of the specific bindings (if any) matches the arglist and transform
6165 the expression into a call of that binding. */
6168 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6170 gfc_typebound_proc
* genproc
;
6171 const char* genname
;
6173 gfc_symbol
*derived
;
6175 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6176 genname
= e
->value
.compcall
.name
;
6177 genproc
= e
->value
.compcall
.tbp
;
6179 if (!genproc
->is_generic
)
6182 /* Try the bindings on this type and in the inheritance hierarchy. */
6183 for (; genproc
; genproc
= genproc
->overridden
)
6187 gcc_assert (genproc
->is_generic
);
6188 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6191 gfc_actual_arglist
* args
;
6194 gcc_assert (g
->specific
);
6196 if (g
->specific
->error
)
6199 target
= g
->specific
->u
.specific
->n
.sym
;
6201 /* Get the right arglist by handling PASS/NOPASS. */
6202 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6203 if (!g
->specific
->nopass
)
6206 po
= extract_compcall_passed_object (e
);
6209 gfc_free_actual_arglist (args
);
6213 gcc_assert (g
->specific
->pass_arg_num
> 0);
6214 gcc_assert (!g
->specific
->error
);
6215 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6216 g
->specific
->pass_arg
);
6218 resolve_actual_arglist (args
, target
->attr
.proc
,
6219 is_external_proc (target
)
6220 && gfc_sym_get_dummy_args (target
) == NULL
);
6222 /* Check if this arglist matches the formal. */
6223 matches
= gfc_arglist_matches_symbol (&args
, target
);
6225 /* Clean up and break out of the loop if we've found it. */
6226 gfc_free_actual_arglist (args
);
6229 e
->value
.compcall
.tbp
= g
->specific
;
6230 genname
= g
->specific_st
->name
;
6231 /* Pass along the name for CLASS methods, where the vtab
6232 procedure pointer component has to be referenced. */
6240 /* Nothing matching found! */
6241 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6242 " %qs at %L", genname
, &e
->where
);
6246 /* Make sure that we have the right specific instance for the name. */
6247 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6249 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6251 e
->value
.compcall
.tbp
= st
->n
.tb
;
6257 /* Resolve a call to a type-bound subroutine. */
6260 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6262 gfc_actual_arglist
* newactual
;
6263 gfc_symtree
* target
;
6265 /* Check that's really a SUBROUTINE. */
6266 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6268 gfc_error ("%qs at %L should be a SUBROUTINE",
6269 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6273 if (!check_typebound_baseobject (c
->expr1
))
6276 /* Pass along the name for CLASS methods, where the vtab
6277 procedure pointer component has to be referenced. */
6279 *name
= c
->expr1
->value
.compcall
.name
;
6281 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6284 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6286 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6288 /* Transform into an ordinary EXEC_CALL for now. */
6290 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6293 c
->ext
.actual
= newactual
;
6294 c
->symtree
= target
;
6295 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6297 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6299 gfc_free_expr (c
->expr1
);
6300 c
->expr1
= gfc_get_expr ();
6301 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6302 c
->expr1
->symtree
= target
;
6303 c
->expr1
->where
= c
->loc
;
6305 return resolve_call (c
);
6309 /* Resolve a component-call expression. */
6311 resolve_compcall (gfc_expr
* e
, const char **name
)
6313 gfc_actual_arglist
* newactual
;
6314 gfc_symtree
* target
;
6316 /* Check that's really a FUNCTION. */
6317 if (!e
->value
.compcall
.tbp
->function
)
6319 gfc_error ("%qs at %L should be a FUNCTION",
6320 e
->value
.compcall
.name
, &e
->where
);
6324 /* These must not be assign-calls! */
6325 gcc_assert (!e
->value
.compcall
.assign
);
6327 if (!check_typebound_baseobject (e
))
6330 /* Pass along the name for CLASS methods, where the vtab
6331 procedure pointer component has to be referenced. */
6333 *name
= e
->value
.compcall
.name
;
6335 if (!resolve_typebound_generic_call (e
, name
))
6337 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6339 /* Take the rank from the function's symbol. */
6340 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6341 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6343 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6344 arglist to the TBP's binding target. */
6346 if (!resolve_typebound_static (e
, &target
, &newactual
))
6349 e
->value
.function
.actual
= newactual
;
6350 e
->value
.function
.name
= NULL
;
6351 e
->value
.function
.esym
= target
->n
.sym
;
6352 e
->value
.function
.isym
= NULL
;
6353 e
->symtree
= target
;
6354 e
->ts
= target
->n
.sym
->ts
;
6355 e
->expr_type
= EXPR_FUNCTION
;
6357 /* Resolution is not necessary if this is a class subroutine; this
6358 function only has to identify the specific proc. Resolution of
6359 the call will be done next in resolve_typebound_call. */
6360 return gfc_resolve_expr (e
);
6364 static bool resolve_fl_derived (gfc_symbol
*sym
);
6367 /* Resolve a typebound function, or 'method'. First separate all
6368 the non-CLASS references by calling resolve_compcall directly. */
6371 resolve_typebound_function (gfc_expr
* e
)
6373 gfc_symbol
*declared
;
6385 /* Deal with typebound operators for CLASS objects. */
6386 expr
= e
->value
.compcall
.base_object
;
6387 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6388 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6390 /* If the base_object is not a variable, the corresponding actual
6391 argument expression must be stored in e->base_expression so
6392 that the corresponding tree temporary can be used as the base
6393 object in gfc_conv_procedure_call. */
6394 if (expr
->expr_type
!= EXPR_VARIABLE
)
6396 gfc_actual_arglist
*args
;
6398 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6400 if (expr
== args
->expr
)
6405 /* Since the typebound operators are generic, we have to ensure
6406 that any delays in resolution are corrected and that the vtab
6409 declared
= ts
.u
.derived
;
6410 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6411 if (c
->ts
.u
.derived
== NULL
)
6412 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6414 if (!resolve_compcall (e
, &name
))
6417 /* Use the generic name if it is there. */
6418 name
= name
? name
: e
->value
.function
.esym
->name
;
6419 e
->symtree
= expr
->symtree
;
6420 e
->ref
= gfc_copy_ref (expr
->ref
);
6421 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6423 /* Trim away the extraneous references that emerge from nested
6424 use of interface.c (extend_expr). */
6425 if (class_ref
&& class_ref
->next
)
6427 gfc_free_ref_list (class_ref
->next
);
6428 class_ref
->next
= NULL
;
6430 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6432 gfc_free_ref_list (e
->ref
);
6436 gfc_add_vptr_component (e
);
6437 gfc_add_component_ref (e
, name
);
6438 e
->value
.function
.esym
= NULL
;
6439 if (expr
->expr_type
!= EXPR_VARIABLE
)
6440 e
->base_expr
= expr
;
6445 return resolve_compcall (e
, NULL
);
6447 if (!resolve_ref (e
))
6450 /* Get the CLASS declared type. */
6451 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6453 if (!resolve_fl_derived (declared
))
6456 /* Weed out cases of the ultimate component being a derived type. */
6457 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6458 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6460 gfc_free_ref_list (new_ref
);
6461 return resolve_compcall (e
, NULL
);
6464 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6465 declared
= c
->ts
.u
.derived
;
6467 /* Treat the call as if it is a typebound procedure, in order to roll
6468 out the correct name for the specific function. */
6469 if (!resolve_compcall (e
, &name
))
6471 gfc_free_ref_list (new_ref
);
6478 /* Convert the expression to a procedure pointer component call. */
6479 e
->value
.function
.esym
= NULL
;
6485 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6486 gfc_add_vptr_component (e
);
6487 gfc_add_component_ref (e
, name
);
6489 /* Recover the typespec for the expression. This is really only
6490 necessary for generic procedures, where the additional call
6491 to gfc_add_component_ref seems to throw the collection of the
6492 correct typespec. */
6496 gfc_free_ref_list (new_ref
);
6501 /* Resolve a typebound subroutine, or 'method'. First separate all
6502 the non-CLASS references by calling resolve_typebound_call
6506 resolve_typebound_subroutine (gfc_code
*code
)
6508 gfc_symbol
*declared
;
6518 st
= code
->expr1
->symtree
;
6520 /* Deal with typebound operators for CLASS objects. */
6521 expr
= code
->expr1
->value
.compcall
.base_object
;
6522 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6523 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6525 /* If the base_object is not a variable, the corresponding actual
6526 argument expression must be stored in e->base_expression so
6527 that the corresponding tree temporary can be used as the base
6528 object in gfc_conv_procedure_call. */
6529 if (expr
->expr_type
!= EXPR_VARIABLE
)
6531 gfc_actual_arglist
*args
;
6533 args
= code
->expr1
->value
.function
.actual
;
6534 for (; args
; args
= args
->next
)
6535 if (expr
== args
->expr
)
6539 /* Since the typebound operators are generic, we have to ensure
6540 that any delays in resolution are corrected and that the vtab
6542 declared
= expr
->ts
.u
.derived
;
6543 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6544 if (c
->ts
.u
.derived
== NULL
)
6545 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6547 if (!resolve_typebound_call (code
, &name
, NULL
))
6550 /* Use the generic name if it is there. */
6551 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6552 code
->expr1
->symtree
= expr
->symtree
;
6553 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6555 /* Trim away the extraneous references that emerge from nested
6556 use of interface.c (extend_expr). */
6557 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6558 if (class_ref
&& class_ref
->next
)
6560 gfc_free_ref_list (class_ref
->next
);
6561 class_ref
->next
= NULL
;
6563 else if (code
->expr1
->ref
&& !class_ref
)
6565 gfc_free_ref_list (code
->expr1
->ref
);
6566 code
->expr1
->ref
= NULL
;
6569 /* Now use the procedure in the vtable. */
6570 gfc_add_vptr_component (code
->expr1
);
6571 gfc_add_component_ref (code
->expr1
, name
);
6572 code
->expr1
->value
.function
.esym
= NULL
;
6573 if (expr
->expr_type
!= EXPR_VARIABLE
)
6574 code
->expr1
->base_expr
= expr
;
6579 return resolve_typebound_call (code
, NULL
, NULL
);
6581 if (!resolve_ref (code
->expr1
))
6584 /* Get the CLASS declared type. */
6585 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6587 /* Weed out cases of the ultimate component being a derived type. */
6588 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6589 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6591 gfc_free_ref_list (new_ref
);
6592 return resolve_typebound_call (code
, NULL
, NULL
);
6595 if (!resolve_typebound_call (code
, &name
, &overridable
))
6597 gfc_free_ref_list (new_ref
);
6600 ts
= code
->expr1
->ts
;
6604 /* Convert the expression to a procedure pointer component call. */
6605 code
->expr1
->value
.function
.esym
= NULL
;
6606 code
->expr1
->symtree
= st
;
6609 code
->expr1
->ref
= new_ref
;
6611 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6612 gfc_add_vptr_component (code
->expr1
);
6613 gfc_add_component_ref (code
->expr1
, name
);
6615 /* Recover the typespec for the expression. This is really only
6616 necessary for generic procedures, where the additional call
6617 to gfc_add_component_ref seems to throw the collection of the
6618 correct typespec. */
6619 code
->expr1
->ts
= ts
;
6622 gfc_free_ref_list (new_ref
);
6628 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6631 resolve_ppc_call (gfc_code
* c
)
6633 gfc_component
*comp
;
6635 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6636 gcc_assert (comp
!= NULL
);
6638 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6639 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6641 if (!comp
->attr
.subroutine
)
6642 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6644 if (!resolve_ref (c
->expr1
))
6647 if (!update_ppc_arglist (c
->expr1
))
6650 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6652 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6653 !(comp
->ts
.interface
6654 && comp
->ts
.interface
->formal
)))
6657 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6660 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6666 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6669 resolve_expr_ppc (gfc_expr
* e
)
6671 gfc_component
*comp
;
6673 comp
= gfc_get_proc_ptr_comp (e
);
6674 gcc_assert (comp
!= NULL
);
6676 /* Convert to EXPR_FUNCTION. */
6677 e
->expr_type
= EXPR_FUNCTION
;
6678 e
->value
.function
.isym
= NULL
;
6679 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6681 if (comp
->as
!= NULL
)
6682 e
->rank
= comp
->as
->rank
;
6684 if (!comp
->attr
.function
)
6685 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6687 if (!resolve_ref (e
))
6690 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6691 !(comp
->ts
.interface
6692 && comp
->ts
.interface
->formal
)))
6695 if (!update_ppc_arglist (e
))
6698 if (!check_pure_function(e
))
6701 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6708 gfc_is_expandable_expr (gfc_expr
*e
)
6710 gfc_constructor
*con
;
6712 if (e
->expr_type
== EXPR_ARRAY
)
6714 /* Traverse the constructor looking for variables that are flavor
6715 parameter. Parameters must be expanded since they are fully used at
6717 con
= gfc_constructor_first (e
->value
.constructor
);
6718 for (; con
; con
= gfc_constructor_next (con
))
6720 if (con
->expr
->expr_type
== EXPR_VARIABLE
6721 && con
->expr
->symtree
6722 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6723 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6725 if (con
->expr
->expr_type
== EXPR_ARRAY
6726 && gfc_is_expandable_expr (con
->expr
))
6735 /* Sometimes variables in specification expressions of the result
6736 of module procedures in submodules wind up not being the 'real'
6737 dummy. Find this, if possible, in the namespace of the first
6741 fixup_unique_dummy (gfc_expr
*e
)
6743 gfc_symtree
*st
= NULL
;
6744 gfc_symbol
*s
= NULL
;
6746 if (e
->symtree
->n
.sym
->ns
->proc_name
6747 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6748 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6751 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6754 && st
->n
.sym
!= NULL
6755 && st
->n
.sym
->attr
.dummy
)
6759 /* Resolve an expression. That is, make sure that types of operands agree
6760 with their operators, intrinsic operators are converted to function calls
6761 for overloaded types and unresolved function references are resolved. */
6764 gfc_resolve_expr (gfc_expr
*e
)
6767 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6772 /* inquiry_argument only applies to variables. */
6773 inquiry_save
= inquiry_argument
;
6774 actual_arg_save
= actual_arg
;
6775 first_actual_arg_save
= first_actual_arg
;
6777 if (e
->expr_type
!= EXPR_VARIABLE
)
6779 inquiry_argument
= false;
6781 first_actual_arg
= false;
6783 else if (e
->symtree
!= NULL
6784 && *e
->symtree
->name
== '@'
6785 && e
->symtree
->n
.sym
->attr
.dummy
)
6787 /* Deal with submodule specification expressions that are not
6788 found to be referenced in module.c(read_cleanup). */
6789 fixup_unique_dummy (e
);
6792 switch (e
->expr_type
)
6795 t
= resolve_operator (e
);
6801 if (check_host_association (e
))
6802 t
= resolve_function (e
);
6804 t
= resolve_variable (e
);
6806 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6807 && e
->ref
->type
!= REF_SUBSTRING
)
6808 gfc_resolve_substring_charlen (e
);
6813 t
= resolve_typebound_function (e
);
6816 case EXPR_SUBSTRING
:
6817 t
= resolve_ref (e
);
6826 t
= resolve_expr_ppc (e
);
6831 if (!resolve_ref (e
))
6834 t
= gfc_resolve_array_constructor (e
);
6835 /* Also try to expand a constructor. */
6838 expression_rank (e
);
6839 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6840 gfc_expand_constructor (e
, false);
6843 /* This provides the opportunity for the length of constructors with
6844 character valued function elements to propagate the string length
6845 to the expression. */
6846 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6848 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6849 here rather then add a duplicate test for it above. */
6850 gfc_expand_constructor (e
, false);
6851 t
= gfc_resolve_character_array_constructor (e
);
6856 case EXPR_STRUCTURE
:
6857 t
= resolve_ref (e
);
6861 t
= resolve_structure_cons (e
, 0);
6865 t
= gfc_simplify_expr (e
, 0);
6869 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6872 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6875 inquiry_argument
= inquiry_save
;
6876 actual_arg
= actual_arg_save
;
6877 first_actual_arg
= first_actual_arg_save
;
6883 /* Resolve an expression from an iterator. They must be scalar and have
6884 INTEGER or (optionally) REAL type. */
6887 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6888 const char *name_msgid
)
6890 if (!gfc_resolve_expr (expr
))
6893 if (expr
->rank
!= 0)
6895 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6899 if (expr
->ts
.type
!= BT_INTEGER
)
6901 if (expr
->ts
.type
== BT_REAL
)
6904 return gfc_notify_std (GFC_STD_F95_DEL
,
6905 "%s at %L must be integer",
6906 _(name_msgid
), &expr
->where
);
6909 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6916 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6924 /* Resolve the expressions in an iterator structure. If REAL_OK is
6925 false allow only INTEGER type iterators, otherwise allow REAL types.
6926 Set own_scope to true for ac-implied-do and data-implied-do as those
6927 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6930 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6932 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6935 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6936 _("iterator variable")))
6939 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6940 "Start expression in DO loop"))
6943 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6944 "End expression in DO loop"))
6947 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6948 "Step expression in DO loop"))
6951 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6953 if ((iter
->step
->ts
.type
== BT_INTEGER
6954 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6955 || (iter
->step
->ts
.type
== BT_REAL
6956 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6958 gfc_error ("Step expression in DO loop at %L cannot be zero",
6959 &iter
->step
->where
);
6964 /* Convert start, end, and step to the same type as var. */
6965 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6966 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6967 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6969 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6970 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6971 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6973 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6974 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6975 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6977 if (iter
->start
->expr_type
== EXPR_CONSTANT
6978 && iter
->end
->expr_type
== EXPR_CONSTANT
6979 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6982 if (iter
->start
->ts
.type
== BT_INTEGER
)
6984 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6985 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6989 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6990 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6992 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6993 gfc_warning (OPT_Wzerotrip
,
6994 "DO loop at %L will be executed zero times",
6995 &iter
->step
->where
);
6998 if (iter
->end
->expr_type
== EXPR_CONSTANT
6999 && iter
->end
->ts
.type
== BT_INTEGER
7000 && iter
->step
->expr_type
== EXPR_CONSTANT
7001 && iter
->step
->ts
.type
== BT_INTEGER
7002 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7003 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7005 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7006 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7008 if (is_step_positive
7009 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7010 gfc_warning (OPT_Wundefined_do_loop
,
7011 "DO loop at %L is undefined as it overflows",
7012 &iter
->step
->where
);
7013 else if (!is_step_positive
7014 && mpz_cmp (iter
->end
->value
.integer
,
7015 gfc_integer_kinds
[k
].min_int
) == 0)
7016 gfc_warning (OPT_Wundefined_do_loop
,
7017 "DO loop at %L is undefined as it underflows",
7018 &iter
->step
->where
);
7025 /* Traversal function for find_forall_index. f == 2 signals that
7026 that variable itself is not to be checked - only the references. */
7029 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7031 if (expr
->expr_type
!= EXPR_VARIABLE
)
7034 /* A scalar assignment */
7035 if (!expr
->ref
|| *f
== 1)
7037 if (expr
->symtree
->n
.sym
== sym
)
7049 /* Check whether the FORALL index appears in the expression or not.
7050 Returns true if SYM is found in EXPR. */
7053 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7055 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7062 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7063 to be a scalar INTEGER variable. The subscripts and stride are scalar
7064 INTEGERs, and if stride is a constant it must be nonzero.
7065 Furthermore "A subscript or stride in a forall-triplet-spec shall
7066 not contain a reference to any index-name in the
7067 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7070 resolve_forall_iterators (gfc_forall_iterator
*it
)
7072 gfc_forall_iterator
*iter
, *iter2
;
7074 for (iter
= it
; iter
; iter
= iter
->next
)
7076 if (gfc_resolve_expr (iter
->var
)
7077 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7078 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7081 if (gfc_resolve_expr (iter
->start
)
7082 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7083 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7084 &iter
->start
->where
);
7085 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7086 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7088 if (gfc_resolve_expr (iter
->end
)
7089 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7090 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7092 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7093 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7095 if (gfc_resolve_expr (iter
->stride
))
7097 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7098 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7099 &iter
->stride
->where
, "INTEGER");
7101 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7102 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7103 gfc_error ("FORALL stride expression at %L cannot be zero",
7104 &iter
->stride
->where
);
7106 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7107 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7110 for (iter
= it
; iter
; iter
= iter
->next
)
7111 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7113 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7114 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7115 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7116 gfc_error ("FORALL index %qs may not appear in triplet "
7117 "specification at %L", iter
->var
->symtree
->name
,
7118 &iter2
->start
->where
);
7123 /* Given a pointer to a symbol that is a derived type, see if it's
7124 inaccessible, i.e. if it's defined in another module and the components are
7125 PRIVATE. The search is recursive if necessary. Returns zero if no
7126 inaccessible components are found, nonzero otherwise. */
7129 derived_inaccessible (gfc_symbol
*sym
)
7133 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7136 for (c
= sym
->components
; c
; c
= c
->next
)
7138 /* Prevent an infinite loop through this function. */
7139 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7140 && sym
== c
->ts
.u
.derived
)
7143 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7151 /* Resolve the argument of a deallocate expression. The expression must be
7152 a pointer or a full array. */
7155 resolve_deallocate_expr (gfc_expr
*e
)
7157 symbol_attribute attr
;
7158 int allocatable
, pointer
;
7164 if (!gfc_resolve_expr (e
))
7167 if (e
->expr_type
!= EXPR_VARIABLE
)
7170 sym
= e
->symtree
->n
.sym
;
7171 unlimited
= UNLIMITED_POLY(sym
);
7173 if (sym
->ts
.type
== BT_CLASS
)
7175 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7176 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7180 allocatable
= sym
->attr
.allocatable
;
7181 pointer
= sym
->attr
.pointer
;
7183 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7188 if (ref
->u
.ar
.type
!= AR_FULL
7189 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7190 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7195 c
= ref
->u
.c
.component
;
7196 if (c
->ts
.type
== BT_CLASS
)
7198 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7199 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7203 allocatable
= c
->attr
.allocatable
;
7204 pointer
= c
->attr
.pointer
;
7214 attr
= gfc_expr_attr (e
);
7216 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7219 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7225 if (gfc_is_coindexed (e
))
7227 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7232 && !gfc_check_vardef_context (e
, true, true, false,
7233 _("DEALLOCATE object")))
7235 if (!gfc_check_vardef_context (e
, false, true, false,
7236 _("DEALLOCATE object")))
7243 /* Returns true if the expression e contains a reference to the symbol sym. */
7245 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7247 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7254 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7256 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7260 /* Given the expression node e for an allocatable/pointer of derived type to be
7261 allocated, get the expression node to be initialized afterwards (needed for
7262 derived types with default initializers, and derived types with allocatable
7263 components that need nullification.) */
7266 gfc_expr_to_initialize (gfc_expr
*e
)
7272 result
= gfc_copy_expr (e
);
7274 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7275 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7276 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7278 ref
->u
.ar
.type
= AR_FULL
;
7280 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7281 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7286 gfc_free_shape (&result
->shape
, result
->rank
);
7288 /* Recalculate rank, shape, etc. */
7289 gfc_resolve_expr (result
);
7294 /* If the last ref of an expression is an array ref, return a copy of the
7295 expression with that one removed. Otherwise, a copy of the original
7296 expression. This is used for allocate-expressions and pointer assignment
7297 LHS, where there may be an array specification that needs to be stripped
7298 off when using gfc_check_vardef_context. */
7301 remove_last_array_ref (gfc_expr
* e
)
7306 e2
= gfc_copy_expr (e
);
7307 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7308 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7310 gfc_free_ref_list (*r
);
7319 /* Used in resolve_allocate_expr to check that a allocation-object and
7320 a source-expr are conformable. This does not catch all possible
7321 cases; in particular a runtime checking is needed. */
7324 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7327 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7329 /* First compare rank. */
7330 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7331 || (!tail
&& e1
->rank
!= e2
->rank
))
7333 gfc_error ("Source-expr at %L must be scalar or have the "
7334 "same rank as the allocate-object at %L",
7335 &e1
->where
, &e2
->where
);
7346 for (i
= 0; i
< e1
->rank
; i
++)
7348 if (tail
->u
.ar
.start
[i
] == NULL
)
7351 if (tail
->u
.ar
.end
[i
])
7353 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7354 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7355 mpz_add_ui (s
, s
, 1);
7359 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7362 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7364 gfc_error ("Source-expr at %L and allocate-object at %L must "
7365 "have the same shape", &e1
->where
, &e2
->where
);
7378 /* Resolve the expression in an ALLOCATE statement, doing the additional
7379 checks to see whether the expression is OK or not. The expression must
7380 have a trailing array reference that gives the size of the array. */
7383 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7385 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7389 symbol_attribute attr
;
7390 gfc_ref
*ref
, *ref2
;
7393 gfc_symbol
*sym
= NULL
;
7398 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7399 checking of coarrays. */
7400 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7401 if (ref
->next
== NULL
)
7404 if (ref
&& ref
->type
== REF_ARRAY
)
7405 ref
->u
.ar
.in_allocate
= true;
7407 if (!gfc_resolve_expr (e
))
7410 /* Make sure the expression is allocatable or a pointer. If it is
7411 pointer, the next-to-last reference must be a pointer. */
7415 sym
= e
->symtree
->n
.sym
;
7417 /* Check whether ultimate component is abstract and CLASS. */
7420 /* Is the allocate-object unlimited polymorphic? */
7421 unlimited
= UNLIMITED_POLY(e
);
7423 if (e
->expr_type
!= EXPR_VARIABLE
)
7426 attr
= gfc_expr_attr (e
);
7427 pointer
= attr
.pointer
;
7428 dimension
= attr
.dimension
;
7429 codimension
= attr
.codimension
;
7433 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7435 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7436 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7437 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7438 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7439 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7443 allocatable
= sym
->attr
.allocatable
;
7444 pointer
= sym
->attr
.pointer
;
7445 dimension
= sym
->attr
.dimension
;
7446 codimension
= sym
->attr
.codimension
;
7451 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7456 if (ref
->u
.ar
.codimen
> 0)
7459 for (n
= ref
->u
.ar
.dimen
;
7460 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7461 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7468 if (ref
->next
!= NULL
)
7476 gfc_error ("Coindexed allocatable object at %L",
7481 c
= ref
->u
.c
.component
;
7482 if (c
->ts
.type
== BT_CLASS
)
7484 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7485 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7486 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7487 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7488 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7492 allocatable
= c
->attr
.allocatable
;
7493 pointer
= c
->attr
.pointer
;
7494 dimension
= c
->attr
.dimension
;
7495 codimension
= c
->attr
.codimension
;
7496 is_abstract
= c
->attr
.abstract
;
7508 /* Check for F08:C628. */
7509 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7511 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7516 /* Some checks for the SOURCE tag. */
7519 /* Check F03:C631. */
7520 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7522 gfc_error ("Type of entity at %L is type incompatible with "
7523 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7527 /* Check F03:C632 and restriction following Note 6.18. */
7528 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7531 /* Check F03:C633. */
7532 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7534 gfc_error ("The allocate-object at %L and the source-expr at %L "
7535 "shall have the same kind type parameter",
7536 &e
->where
, &code
->expr3
->where
);
7540 /* Check F2008, C642. */
7541 if (code
->expr3
->ts
.type
== BT_DERIVED
7542 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7543 || (code
->expr3
->ts
.u
.derived
->from_intmod
7544 == INTMOD_ISO_FORTRAN_ENV
7545 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7546 == ISOFORTRAN_LOCK_TYPE
)))
7548 gfc_error ("The source-expr at %L shall neither be of type "
7549 "LOCK_TYPE nor have a LOCK_TYPE component if "
7550 "allocate-object at %L is a coarray",
7551 &code
->expr3
->where
, &e
->where
);
7555 /* Check TS18508, C702/C703. */
7556 if (code
->expr3
->ts
.type
== BT_DERIVED
7557 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7558 || (code
->expr3
->ts
.u
.derived
->from_intmod
7559 == INTMOD_ISO_FORTRAN_ENV
7560 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7561 == ISOFORTRAN_EVENT_TYPE
)))
7563 gfc_error ("The source-expr at %L shall neither be of type "
7564 "EVENT_TYPE nor have a EVENT_TYPE component if "
7565 "allocate-object at %L is a coarray",
7566 &code
->expr3
->where
, &e
->where
);
7571 /* Check F08:C629. */
7572 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7575 gcc_assert (e
->ts
.type
== BT_CLASS
);
7576 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7577 "type-spec or source-expr", sym
->name
, &e
->where
);
7581 /* Check F08:C632. */
7582 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7583 && !UNLIMITED_POLY (e
))
7587 if (!e
->ts
.u
.cl
->length
)
7590 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7591 code
->ext
.alloc
.ts
.u
.cl
->length
);
7592 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7594 gfc_error ("Allocating %s at %L with type-spec requires the same "
7595 "character-length parameter as in the declaration",
7596 sym
->name
, &e
->where
);
7601 /* In the variable definition context checks, gfc_expr_attr is used
7602 on the expression. This is fooled by the array specification
7603 present in e, thus we have to eliminate that one temporarily. */
7604 e2
= remove_last_array_ref (e
);
7607 t
= gfc_check_vardef_context (e2
, true, true, false,
7608 _("ALLOCATE object"));
7610 t
= gfc_check_vardef_context (e2
, false, true, false,
7611 _("ALLOCATE object"));
7616 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7617 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7619 /* For class arrays, the initialization with SOURCE is done
7620 using _copy and trans_call. It is convenient to exploit that
7621 when the allocated type is different from the declared type but
7622 no SOURCE exists by setting expr3. */
7623 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7625 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7626 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7627 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7629 /* We have to zero initialize the integer variable. */
7630 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7633 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7635 /* Make sure the vtab symbol is present when
7636 the module variables are generated. */
7637 gfc_typespec ts
= e
->ts
;
7639 ts
= code
->expr3
->ts
;
7640 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7641 ts
= code
->ext
.alloc
.ts
;
7643 /* Finding the vtab also publishes the type's symbol. Therefore this
7644 statement is necessary. */
7645 gfc_find_derived_vtab (ts
.u
.derived
);
7647 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7649 /* Again, make sure the vtab symbol is present when
7650 the module variables are generated. */
7651 gfc_typespec
*ts
= NULL
;
7653 ts
= &code
->expr3
->ts
;
7655 ts
= &code
->ext
.alloc
.ts
;
7659 /* Finding the vtab also publishes the type's symbol. Therefore this
7660 statement is necessary. */
7664 if (dimension
== 0 && codimension
== 0)
7667 /* Make sure the last reference node is an array specification. */
7669 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7670 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7675 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7676 "in ALLOCATE statement at %L", &e
->where
))
7678 if (code
->expr3
->rank
!= 0)
7679 *array_alloc_wo_spec
= true;
7682 gfc_error ("Array specification or array-valued SOURCE= "
7683 "expression required in ALLOCATE statement at %L",
7690 gfc_error ("Array specification required in ALLOCATE statement "
7691 "at %L", &e
->where
);
7696 /* Make sure that the array section reference makes sense in the
7697 context of an ALLOCATE specification. */
7702 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7703 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7705 gfc_error ("Coarray specification required in ALLOCATE statement "
7706 "at %L", &e
->where
);
7710 for (i
= 0; i
< ar
->dimen
; i
++)
7712 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7715 switch (ar
->dimen_type
[i
])
7721 if (ar
->start
[i
] != NULL
7722 && ar
->end
[i
] != NULL
7723 && ar
->stride
[i
] == NULL
)
7731 case DIMEN_THIS_IMAGE
:
7732 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7738 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7740 sym
= a
->expr
->symtree
->n
.sym
;
7742 /* TODO - check derived type components. */
7743 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7746 if ((ar
->start
[i
] != NULL
7747 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7748 || (ar
->end
[i
] != NULL
7749 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7751 gfc_error ("%qs must not appear in the array specification at "
7752 "%L in the same ALLOCATE statement where it is "
7753 "itself allocated", sym
->name
, &ar
->where
);
7759 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7761 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7762 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7764 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7766 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7767 "statement at %L", &e
->where
);
7773 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7774 && ar
->stride
[i
] == NULL
)
7777 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7791 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7793 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7794 gfc_alloc
*a
, *p
, *q
;
7797 errmsg
= code
->expr2
;
7799 /* Check the stat variable. */
7802 gfc_check_vardef_context (stat
, false, false, false,
7803 _("STAT variable"));
7805 if ((stat
->ts
.type
!= BT_INTEGER
7806 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7807 || stat
->ref
->type
== REF_COMPONENT
)))
7809 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7810 "variable", &stat
->where
);
7812 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7813 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7815 gfc_ref
*ref1
, *ref2
;
7818 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7819 ref1
= ref1
->next
, ref2
= ref2
->next
)
7821 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7823 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7832 gfc_error ("Stat-variable at %L shall not be %sd within "
7833 "the same %s statement", &stat
->where
, fcn
, fcn
);
7839 /* Check the errmsg variable. */
7843 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7846 gfc_check_vardef_context (errmsg
, false, false, false,
7847 _("ERRMSG variable"));
7849 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7850 F18:R930 errmsg-variable is scalar-default-char-variable
7851 F18:R906 default-char-variable is variable
7852 F18:C906 default-char-variable shall be default character. */
7853 if ((errmsg
->ts
.type
!= BT_CHARACTER
7855 && (errmsg
->ref
->type
== REF_ARRAY
7856 || errmsg
->ref
->type
== REF_COMPONENT
)))
7858 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7859 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7860 "variable", &errmsg
->where
);
7862 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7863 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7865 gfc_ref
*ref1
, *ref2
;
7868 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7869 ref1
= ref1
->next
, ref2
= ref2
->next
)
7871 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7873 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7882 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7883 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7889 /* Check that an allocate-object appears only once in the statement. */
7891 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7894 for (q
= p
->next
; q
; q
= q
->next
)
7897 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7899 /* This is a potential collision. */
7900 gfc_ref
*pr
= pe
->ref
;
7901 gfc_ref
*qr
= qe
->ref
;
7903 /* Follow the references until
7904 a) They start to differ, in which case there is no error;
7905 you can deallocate a%b and a%c in a single statement
7906 b) Both of them stop, which is an error
7907 c) One of them stops, which is also an error. */
7910 if (pr
== NULL
&& qr
== NULL
)
7912 gfc_error ("Allocate-object at %L also appears at %L",
7913 &pe
->where
, &qe
->where
);
7916 else if (pr
!= NULL
&& qr
== NULL
)
7918 gfc_error ("Allocate-object at %L is subobject of"
7919 " object at %L", &pe
->where
, &qe
->where
);
7922 else if (pr
== NULL
&& qr
!= NULL
)
7924 gfc_error ("Allocate-object at %L is subobject of"
7925 " object at %L", &qe
->where
, &pe
->where
);
7928 /* Here, pr != NULL && qr != NULL */
7929 gcc_assert(pr
->type
== qr
->type
);
7930 if (pr
->type
== REF_ARRAY
)
7932 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7934 gcc_assert (qr
->type
== REF_ARRAY
);
7936 if (pr
->next
&& qr
->next
)
7939 gfc_array_ref
*par
= &(pr
->u
.ar
);
7940 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7942 for (i
=0; i
<par
->dimen
; i
++)
7944 if ((par
->start
[i
] != NULL
7945 || qar
->start
[i
] != NULL
)
7946 && gfc_dep_compare_expr (par
->start
[i
],
7947 qar
->start
[i
]) != 0)
7954 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7967 if (strcmp (fcn
, "ALLOCATE") == 0)
7969 bool arr_alloc_wo_spec
= false;
7971 /* Resolving the expr3 in the loop over all objects to allocate would
7972 execute loop invariant code for each loop item. Therefore do it just
7974 if (code
->expr3
&& code
->expr3
->mold
7975 && code
->expr3
->ts
.type
== BT_DERIVED
)
7977 /* Default initialization via MOLD (non-polymorphic). */
7978 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7981 gfc_resolve_expr (rhs
);
7982 gfc_free_expr (code
->expr3
);
7986 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7987 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7989 if (arr_alloc_wo_spec
&& code
->expr3
)
7991 /* Mark the allocate to have to take the array specification
7993 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7998 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7999 resolve_deallocate_expr (a
->expr
);
8004 /************ SELECT CASE resolution subroutines ************/
8006 /* Callback function for our mergesort variant. Determines interval
8007 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8008 op1 > op2. Assumes we're not dealing with the default case.
8009 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8010 There are nine situations to check. */
8013 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8017 if (op1
->low
== NULL
) /* op1 = (:L) */
8019 /* op2 = (:N), so overlap. */
8021 /* op2 = (M:) or (M:N), L < M */
8022 if (op2
->low
!= NULL
8023 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8026 else if (op1
->high
== NULL
) /* op1 = (K:) */
8028 /* op2 = (M:), so overlap. */
8030 /* op2 = (:N) or (M:N), K > N */
8031 if (op2
->high
!= NULL
8032 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8035 else /* op1 = (K:L) */
8037 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8038 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8040 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8041 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8043 else /* op2 = (M:N) */
8047 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8050 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8059 /* Merge-sort a double linked case list, detecting overlap in the
8060 process. LIST is the head of the double linked case list before it
8061 is sorted. Returns the head of the sorted list if we don't see any
8062 overlap, or NULL otherwise. */
8065 check_case_overlap (gfc_case
*list
)
8067 gfc_case
*p
, *q
, *e
, *tail
;
8068 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8070 /* If the passed list was empty, return immediately. */
8077 /* Loop unconditionally. The only exit from this loop is a return
8078 statement, when we've finished sorting the case list. */
8085 /* Count the number of merges we do in this pass. */
8088 /* Loop while there exists a merge to be done. */
8093 /* Count this merge. */
8096 /* Cut the list in two pieces by stepping INSIZE places
8097 forward in the list, starting from P. */
8100 for (i
= 0; i
< insize
; i
++)
8109 /* Now we have two lists. Merge them! */
8110 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8112 /* See from which the next case to merge comes from. */
8115 /* P is empty so the next case must come from Q. */
8120 else if (qsize
== 0 || q
== NULL
)
8129 cmp
= compare_cases (p
, q
);
8132 /* The whole case range for P is less than the
8140 /* The whole case range for Q is greater than
8141 the case range for P. */
8148 /* The cases overlap, or they are the same
8149 element in the list. Either way, we must
8150 issue an error and get the next case from P. */
8151 /* FIXME: Sort P and Q by line number. */
8152 gfc_error ("CASE label at %L overlaps with CASE "
8153 "label at %L", &p
->where
, &q
->where
);
8161 /* Add the next element to the merged list. */
8170 /* P has now stepped INSIZE places along, and so has Q. So
8171 they're the same. */
8176 /* If we have done only one merge or none at all, we've
8177 finished sorting the cases. */
8186 /* Otherwise repeat, merging lists twice the size. */
8192 /* Check to see if an expression is suitable for use in a CASE statement.
8193 Makes sure that all case expressions are scalar constants of the same
8194 type. Return false if anything is wrong. */
8197 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8199 if (e
== NULL
) return true;
8201 if (e
->ts
.type
!= case_expr
->ts
.type
)
8203 gfc_error ("Expression in CASE statement at %L must be of type %s",
8204 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8208 /* C805 (R808) For a given case-construct, each case-value shall be of
8209 the same type as case-expr. For character type, length differences
8210 are allowed, but the kind type parameters shall be the same. */
8212 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8214 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8215 &e
->where
, case_expr
->ts
.kind
);
8219 /* Convert the case value kind to that of case expression kind,
8222 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8223 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8227 gfc_error ("Expression in CASE statement at %L must be scalar",
8236 /* Given a completely parsed select statement, we:
8238 - Validate all expressions and code within the SELECT.
8239 - Make sure that the selection expression is not of the wrong type.
8240 - Make sure that no case ranges overlap.
8241 - Eliminate unreachable cases and unreachable code resulting from
8242 removing case labels.
8244 The standard does allow unreachable cases, e.g. CASE (5:3). But
8245 they are a hassle for code generation, and to prevent that, we just
8246 cut them out here. This is not necessary for overlapping cases
8247 because they are illegal and we never even try to generate code.
8249 We have the additional caveat that a SELECT construct could have
8250 been a computed GOTO in the source code. Fortunately we can fairly
8251 easily work around that here: The case_expr for a "real" SELECT CASE
8252 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8253 we have to do is make sure that the case_expr is a scalar integer
8257 resolve_select (gfc_code
*code
, bool select_type
)
8260 gfc_expr
*case_expr
;
8261 gfc_case
*cp
, *default_case
, *tail
, *head
;
8262 int seen_unreachable
;
8268 if (code
->expr1
== NULL
)
8270 /* This was actually a computed GOTO statement. */
8271 case_expr
= code
->expr2
;
8272 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8273 gfc_error ("Selection expression in computed GOTO statement "
8274 "at %L must be a scalar integer expression",
8277 /* Further checking is not necessary because this SELECT was built
8278 by the compiler, so it should always be OK. Just move the
8279 case_expr from expr2 to expr so that we can handle computed
8280 GOTOs as normal SELECTs from here on. */
8281 code
->expr1
= code
->expr2
;
8286 case_expr
= code
->expr1
;
8287 type
= case_expr
->ts
.type
;
8290 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8292 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8293 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8295 /* Punt. Going on here just produce more garbage error messages. */
8300 if (!select_type
&& case_expr
->rank
!= 0)
8302 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8303 "expression", &case_expr
->where
);
8309 /* Raise a warning if an INTEGER case value exceeds the range of
8310 the case-expr. Later, all expressions will be promoted to the
8311 largest kind of all case-labels. */
8313 if (type
== BT_INTEGER
)
8314 for (body
= code
->block
; body
; body
= body
->block
)
8315 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8318 && gfc_check_integer_range (cp
->low
->value
.integer
,
8319 case_expr
->ts
.kind
) != ARITH_OK
)
8320 gfc_warning (0, "Expression in CASE statement at %L is "
8321 "not in the range of %s", &cp
->low
->where
,
8322 gfc_typename (&case_expr
->ts
));
8325 && cp
->low
!= cp
->high
8326 && gfc_check_integer_range (cp
->high
->value
.integer
,
8327 case_expr
->ts
.kind
) != ARITH_OK
)
8328 gfc_warning (0, "Expression in CASE statement at %L is "
8329 "not in the range of %s", &cp
->high
->where
,
8330 gfc_typename (&case_expr
->ts
));
8333 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8334 of the SELECT CASE expression and its CASE values. Walk the lists
8335 of case values, and if we find a mismatch, promote case_expr to
8336 the appropriate kind. */
8338 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8340 for (body
= code
->block
; body
; body
= body
->block
)
8342 /* Walk the case label list. */
8343 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8345 /* Intercept the DEFAULT case. It does not have a kind. */
8346 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8349 /* Unreachable case ranges are discarded, so ignore. */
8350 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8351 && cp
->low
!= cp
->high
8352 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8356 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8357 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8359 if (cp
->high
!= NULL
8360 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8361 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8366 /* Assume there is no DEFAULT case. */
8367 default_case
= NULL
;
8372 for (body
= code
->block
; body
; body
= body
->block
)
8374 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8376 seen_unreachable
= 0;
8378 /* Walk the case label list, making sure that all case labels
8380 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8382 /* Count the number of cases in the whole construct. */
8385 /* Intercept the DEFAULT case. */
8386 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8388 if (default_case
!= NULL
)
8390 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8391 "by a second DEFAULT CASE at %L",
8392 &default_case
->where
, &cp
->where
);
8403 /* Deal with single value cases and case ranges. Errors are
8404 issued from the validation function. */
8405 if (!validate_case_label_expr (cp
->low
, case_expr
)
8406 || !validate_case_label_expr (cp
->high
, case_expr
))
8412 if (type
== BT_LOGICAL
8413 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8414 || cp
->low
!= cp
->high
))
8416 gfc_error ("Logical range in CASE statement at %L is not "
8417 "allowed", &cp
->low
->where
);
8422 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8425 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8426 if (value
& seen_logical
)
8428 gfc_error ("Constant logical value in CASE statement "
8429 "is repeated at %L",
8434 seen_logical
|= value
;
8437 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8438 && cp
->low
!= cp
->high
8439 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8441 if (warn_surprising
)
8442 gfc_warning (OPT_Wsurprising
,
8443 "Range specification at %L can never be matched",
8446 cp
->unreachable
= 1;
8447 seen_unreachable
= 1;
8451 /* If the case range can be matched, it can also overlap with
8452 other cases. To make sure it does not, we put it in a
8453 double linked list here. We sort that with a merge sort
8454 later on to detect any overlapping cases. */
8458 head
->right
= head
->left
= NULL
;
8463 tail
->right
->left
= tail
;
8470 /* It there was a failure in the previous case label, give up
8471 for this case label list. Continue with the next block. */
8475 /* See if any case labels that are unreachable have been seen.
8476 If so, we eliminate them. This is a bit of a kludge because
8477 the case lists for a single case statement (label) is a
8478 single forward linked lists. */
8479 if (seen_unreachable
)
8481 /* Advance until the first case in the list is reachable. */
8482 while (body
->ext
.block
.case_list
!= NULL
8483 && body
->ext
.block
.case_list
->unreachable
)
8485 gfc_case
*n
= body
->ext
.block
.case_list
;
8486 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8488 gfc_free_case_list (n
);
8491 /* Strip all other unreachable cases. */
8492 if (body
->ext
.block
.case_list
)
8494 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8496 if (cp
->next
->unreachable
)
8498 gfc_case
*n
= cp
->next
;
8499 cp
->next
= cp
->next
->next
;
8501 gfc_free_case_list (n
);
8508 /* See if there were overlapping cases. If the check returns NULL,
8509 there was overlap. In that case we don't do anything. If head
8510 is non-NULL, we prepend the DEFAULT case. The sorted list can
8511 then used during code generation for SELECT CASE constructs with
8512 a case expression of a CHARACTER type. */
8515 head
= check_case_overlap (head
);
8517 /* Prepend the default_case if it is there. */
8518 if (head
!= NULL
&& default_case
)
8520 default_case
->left
= NULL
;
8521 default_case
->right
= head
;
8522 head
->left
= default_case
;
8526 /* Eliminate dead blocks that may be the result if we've seen
8527 unreachable case labels for a block. */
8528 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8530 if (body
->block
->ext
.block
.case_list
== NULL
)
8532 /* Cut the unreachable block from the code chain. */
8533 gfc_code
*c
= body
->block
;
8534 body
->block
= c
->block
;
8536 /* Kill the dead block, but not the blocks below it. */
8538 gfc_free_statements (c
);
8542 /* More than two cases is legal but insane for logical selects.
8543 Issue a warning for it. */
8544 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8545 gfc_warning (OPT_Wsurprising
,
8546 "Logical SELECT CASE block at %L has more that two cases",
8551 /* Check if a derived type is extensible. */
8554 gfc_type_is_extensible (gfc_symbol
*sym
)
8556 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8557 || (sym
->attr
.is_class
8558 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8563 resolve_types (gfc_namespace
*ns
);
8565 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8566 correct as well as possibly the array-spec. */
8569 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8573 gcc_assert (sym
->assoc
);
8574 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8576 /* If this is for SELECT TYPE, the target may not yet be set. In that
8577 case, return. Resolution will be called later manually again when
8579 target
= sym
->assoc
->target
;
8582 gcc_assert (!sym
->assoc
->dangling
);
8584 if (resolve_target
&& !gfc_resolve_expr (target
))
8587 /* For variable targets, we get some attributes from the target. */
8588 if (target
->expr_type
== EXPR_VARIABLE
)
8592 gcc_assert (target
->symtree
);
8593 tsym
= target
->symtree
->n
.sym
;
8595 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8596 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8598 sym
->attr
.target
= tsym
->attr
.target
8599 || gfc_expr_attr (target
).pointer
;
8600 if (is_subref_array (target
))
8601 sym
->attr
.subref_array_pointer
= 1;
8604 if (target
->expr_type
== EXPR_NULL
)
8606 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8609 else if (target
->ts
.type
== BT_UNKNOWN
)
8611 gfc_error ("Selector at %L has no type", &target
->where
);
8615 /* Get type if this was not already set. Note that it can be
8616 some other type than the target in case this is a SELECT TYPE
8617 selector! So we must not update when the type is already there. */
8618 if (sym
->ts
.type
== BT_UNKNOWN
)
8619 sym
->ts
= target
->ts
;
8621 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8623 /* See if this is a valid association-to-variable. */
8624 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8625 && !gfc_has_vector_subscript (target
));
8627 /* Finally resolve if this is an array or not. */
8628 if (sym
->attr
.dimension
&& target
->rank
== 0)
8630 /* primary.c makes the assumption that a reference to an associate
8631 name followed by a left parenthesis is an array reference. */
8632 if (sym
->ts
.type
!= BT_CHARACTER
)
8633 gfc_error ("Associate-name %qs at %L is used as array",
8634 sym
->name
, &sym
->declared_at
);
8635 sym
->attr
.dimension
= 0;
8640 /* We cannot deal with class selectors that need temporaries. */
8641 if (target
->ts
.type
== BT_CLASS
8642 && gfc_ref_needs_temporary_p (target
->ref
))
8644 gfc_error ("CLASS selector at %L needs a temporary which is not "
8645 "yet implemented", &target
->where
);
8649 if (target
->ts
.type
== BT_CLASS
)
8650 gfc_fix_class_refs (target
);
8652 if (target
->rank
!= 0)
8655 /* The rank may be incorrectly guessed at parsing, therefore make sure
8656 it is corrected now. */
8657 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8660 sym
->as
= gfc_get_array_spec ();
8662 as
->rank
= target
->rank
;
8663 as
->type
= AS_DEFERRED
;
8664 as
->corank
= gfc_get_corank (target
);
8665 sym
->attr
.dimension
= 1;
8666 if (as
->corank
!= 0)
8667 sym
->attr
.codimension
= 1;
8672 /* target's rank is 0, but the type of the sym is still array valued,
8673 which has to be corrected. */
8674 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8677 symbol_attribute attr
;
8678 /* The associated variable's type is still the array type
8679 correct this now. */
8680 gfc_typespec
*ts
= &target
->ts
;
8683 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8688 ts
= &ref
->u
.c
.component
->ts
;
8691 if (ts
->type
== BT_CLASS
)
8692 ts
= &ts
->u
.derived
->components
->ts
;
8698 /* Create a scalar instance of the current class type. Because the
8699 rank of a class array goes into its name, the type has to be
8700 rebuild. The alternative of (re-)setting just the attributes
8701 and as in the current type, destroys the type also in other
8705 sym
->ts
.type
= BT_CLASS
;
8706 attr
= CLASS_DATA (sym
)->attr
;
8708 attr
.associate_var
= 1;
8709 attr
.dimension
= attr
.codimension
= 0;
8710 attr
.class_pointer
= 1;
8711 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8713 /* Make sure the _vptr is set. */
8714 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8715 if (c
->ts
.u
.derived
== NULL
)
8716 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8717 CLASS_DATA (sym
)->attr
.pointer
= 1;
8718 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8719 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8720 gfc_commit_symbol (sym
->ts
.u
.derived
);
8721 /* _vptr now has the _vtab in it, change it to the _vtype. */
8722 if (c
->ts
.u
.derived
->attr
.vtab
)
8723 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8724 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8725 resolve_types (c
->ts
.u
.derived
->ns
);
8729 /* Mark this as an associate variable. */
8730 sym
->attr
.associate_var
= 1;
8732 /* Fix up the type-spec for CHARACTER types. */
8733 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8736 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8738 if (!sym
->ts
.u
.cl
->length
8739 && !sym
->ts
.deferred
8740 && target
->expr_type
== EXPR_CONSTANT
)
8742 sym
->ts
.u
.cl
->length
=
8743 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8744 target
->value
.character
.length
);
8746 else if ((!sym
->ts
.u
.cl
->length
8747 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8748 && target
->expr_type
!= EXPR_VARIABLE
)
8750 sym
->ts
.u
.cl
= gfc_get_charlen();
8751 sym
->ts
.deferred
= 1;
8753 /* This is reset in trans-stmt.c after the assignment
8754 of the target expression to the associate name. */
8755 sym
->attr
.allocatable
= 1;
8759 /* If the target is a good class object, so is the associate variable. */
8760 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8761 sym
->attr
.class_ok
= 1;
8765 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8766 array reference, where necessary. The symbols are artificial and so
8767 the dimension attribute and arrayspec can also be set. In addition,
8768 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8769 This is corrected here as well.*/
8772 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8773 int rank
, gfc_ref
*ref
)
8775 gfc_ref
*nref
= (*expr1
)->ref
;
8776 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8777 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8778 (*expr1
)->rank
= rank
;
8779 if (sym1
->ts
.type
== BT_CLASS
)
8781 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8782 (*expr1
)->ts
= sym1
->ts
;
8784 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8785 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8786 CLASS_DATA (sym1
)->as
8787 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8791 sym1
->attr
.dimension
= 1;
8792 if (sym1
->as
== NULL
&& sym2
)
8793 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8796 for (; nref
; nref
= nref
->next
)
8797 if (nref
->next
== NULL
)
8800 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8801 nref
->next
= gfc_copy_ref (ref
);
8802 else if (ref
&& !nref
)
8803 (*expr1
)->ref
= gfc_copy_ref (ref
);
8808 build_loc_call (gfc_expr
*sym_expr
)
8811 loc_call
= gfc_get_expr ();
8812 loc_call
->expr_type
= EXPR_FUNCTION
;
8813 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8814 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8815 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8816 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8817 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8818 loc_call
->ts
.type
= BT_INTEGER
;
8819 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8820 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8821 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8822 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8823 loc_call
->where
= sym_expr
->where
;
8827 /* Resolve a SELECT TYPE statement. */
8830 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8832 gfc_symbol
*selector_type
;
8833 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8834 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8837 char name
[GFC_MAX_SYMBOL_LEN
];
8841 gfc_ref
* ref
= NULL
;
8842 gfc_expr
*selector_expr
= NULL
;
8844 ns
= code
->ext
.block
.ns
;
8847 /* Check for F03:C813. */
8848 if (code
->expr1
->ts
.type
!= BT_CLASS
8849 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8851 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8852 "at %L", &code
->loc
);
8856 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8861 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8862 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8863 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8865 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8866 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8868 /* F2008: C803 The selector expression must not be coindexed. */
8869 if (gfc_is_coindexed (code
->expr2
))
8871 gfc_error ("Selector at %L must not be coindexed",
8872 &code
->expr2
->where
);
8879 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8881 if (gfc_is_coindexed (code
->expr1
))
8883 gfc_error ("Selector at %L must not be coindexed",
8884 &code
->expr1
->where
);
8889 /* Loop over TYPE IS / CLASS IS cases. */
8890 for (body
= code
->block
; body
; body
= body
->block
)
8892 c
= body
->ext
.block
.case_list
;
8896 /* Check for repeated cases. */
8897 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8899 gfc_case
*d
= tail
->ext
.block
.case_list
;
8903 if (c
->ts
.type
== d
->ts
.type
8904 && ((c
->ts
.type
== BT_DERIVED
8905 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8906 && !strcmp (c
->ts
.u
.derived
->name
,
8907 d
->ts
.u
.derived
->name
))
8908 || c
->ts
.type
== BT_UNKNOWN
8909 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8910 && c
->ts
.kind
== d
->ts
.kind
)))
8912 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8913 &c
->where
, &d
->where
);
8919 /* Check F03:C815. */
8920 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8921 && !selector_type
->attr
.unlimited_polymorphic
8922 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8924 gfc_error ("Derived type %qs at %L must be extensible",
8925 c
->ts
.u
.derived
->name
, &c
->where
);
8930 /* Check F03:C816. */
8931 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8932 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8933 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8935 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8936 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8937 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8939 gfc_error ("Unexpected intrinsic type %qs at %L",
8940 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8945 /* Check F03:C814. */
8946 if (c
->ts
.type
== BT_CHARACTER
8947 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8949 gfc_error ("The type-spec at %L shall specify that each length "
8950 "type parameter is assumed", &c
->where
);
8955 /* Intercept the DEFAULT case. */
8956 if (c
->ts
.type
== BT_UNKNOWN
)
8958 /* Check F03:C818. */
8961 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8962 "by a second DEFAULT CASE at %L",
8963 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8968 default_case
= body
;
8975 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8976 target if present. If there are any EXIT statements referring to the
8977 SELECT TYPE construct, this is no problem because the gfc_code
8978 reference stays the same and EXIT is equally possible from the BLOCK
8979 it is changed to. */
8980 code
->op
= EXEC_BLOCK
;
8983 gfc_association_list
* assoc
;
8985 assoc
= gfc_get_association_list ();
8986 assoc
->st
= code
->expr1
->symtree
;
8987 assoc
->target
= gfc_copy_expr (code
->expr2
);
8988 assoc
->target
->where
= code
->expr2
->where
;
8989 /* assoc->variable will be set by resolve_assoc_var. */
8991 code
->ext
.block
.assoc
= assoc
;
8992 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8994 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8997 code
->ext
.block
.assoc
= NULL
;
8999 /* Ensure that the selector rank and arrayspec are available to
9000 correct expressions in which they might be missing. */
9001 if (code
->expr2
&& code
->expr2
->rank
)
9003 rank
= code
->expr2
->rank
;
9004 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9005 if (ref
->next
== NULL
)
9007 if (ref
&& ref
->type
== REF_ARRAY
)
9008 ref
= gfc_copy_ref (ref
);
9010 /* Fixup expr1 if necessary. */
9012 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9014 else if (code
->expr1
->rank
)
9016 rank
= code
->expr1
->rank
;
9017 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9018 if (ref
->next
== NULL
)
9020 if (ref
&& ref
->type
== REF_ARRAY
)
9021 ref
= gfc_copy_ref (ref
);
9024 /* Add EXEC_SELECT to switch on type. */
9025 new_st
= gfc_get_code (code
->op
);
9026 new_st
->expr1
= code
->expr1
;
9027 new_st
->expr2
= code
->expr2
;
9028 new_st
->block
= code
->block
;
9029 code
->expr1
= code
->expr2
= NULL
;
9034 ns
->code
->next
= new_st
;
9036 code
->op
= EXEC_SELECT_TYPE
;
9038 /* Use the intrinsic LOC function to generate an integer expression
9039 for the vtable of the selector. Note that the rank of the selector
9040 expression has to be set to zero. */
9041 gfc_add_vptr_component (code
->expr1
);
9042 code
->expr1
->rank
= 0;
9043 code
->expr1
= build_loc_call (code
->expr1
);
9044 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9046 /* Loop over TYPE IS / CLASS IS cases. */
9047 for (body
= code
->block
; body
; body
= body
->block
)
9051 c
= body
->ext
.block
.case_list
;
9053 /* Generate an index integer expression for address of the
9054 TYPE/CLASS vtable and store it in c->low. The hash expression
9055 is stored in c->high and is used to resolve intrinsic cases. */
9056 if (c
->ts
.type
!= BT_UNKNOWN
)
9058 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9060 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9062 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9063 c
->ts
.u
.derived
->hash_value
);
9067 vtab
= gfc_find_vtab (&c
->ts
);
9068 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9069 e
= CLASS_DATA (vtab
)->initializer
;
9070 c
->high
= gfc_copy_expr (e
);
9071 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9074 ts
.kind
= gfc_integer_4_kind
;
9075 ts
.type
= BT_INTEGER
;
9076 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9080 e
= gfc_lval_expr_from_sym (vtab
);
9081 c
->low
= build_loc_call (e
);
9086 /* Associate temporary to selector. This should only be done
9087 when this case is actually true, so build a new ASSOCIATE
9088 that does precisely this here (instead of using the
9091 if (c
->ts
.type
== BT_CLASS
)
9092 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9093 else if (c
->ts
.type
== BT_DERIVED
)
9094 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9095 else if (c
->ts
.type
== BT_CHARACTER
)
9097 HOST_WIDE_INT charlen
= 0;
9098 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9099 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9100 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9101 snprintf (name
, sizeof (name
),
9102 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9103 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9106 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9109 st
= gfc_find_symtree (ns
->sym_root
, name
);
9110 gcc_assert (st
->n
.sym
->assoc
);
9111 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9112 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9113 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9115 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9116 /* Fixup the target expression if necessary. */
9118 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9121 new_st
= gfc_get_code (EXEC_BLOCK
);
9122 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9123 new_st
->ext
.block
.ns
->code
= body
->next
;
9124 body
->next
= new_st
;
9126 /* Chain in the new list only if it is marked as dangling. Otherwise
9127 there is a CASE label overlap and this is already used. Just ignore,
9128 the error is diagnosed elsewhere. */
9129 if (st
->n
.sym
->assoc
->dangling
)
9131 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9132 st
->n
.sym
->assoc
->dangling
= 0;
9135 resolve_assoc_var (st
->n
.sym
, false);
9138 /* Take out CLASS IS cases for separate treatment. */
9140 while (body
&& body
->block
)
9142 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9144 /* Add to class_is list. */
9145 if (class_is
== NULL
)
9147 class_is
= body
->block
;
9152 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9153 tail
->block
= body
->block
;
9156 /* Remove from EXEC_SELECT list. */
9157 body
->block
= body
->block
->block
;
9170 /* Add a default case to hold the CLASS IS cases. */
9171 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9172 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9174 tail
->ext
.block
.case_list
= gfc_get_case ();
9175 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9177 default_case
= tail
;
9180 /* More than one CLASS IS block? */
9181 if (class_is
->block
)
9185 /* Sort CLASS IS blocks by extension level. */
9189 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9192 /* F03:C817 (check for doubles). */
9193 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9194 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9196 gfc_error ("Double CLASS IS block in SELECT TYPE "
9198 &c2
->ext
.block
.case_list
->where
);
9201 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9202 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9205 (*c1
)->block
= c2
->block
;
9215 /* Generate IF chain. */
9216 if_st
= gfc_get_code (EXEC_IF
);
9218 for (body
= class_is
; body
; body
= body
->block
)
9220 new_st
->block
= gfc_get_code (EXEC_IF
);
9221 new_st
= new_st
->block
;
9222 /* Set up IF condition: Call _gfortran_is_extension_of. */
9223 new_st
->expr1
= gfc_get_expr ();
9224 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9225 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9226 new_st
->expr1
->ts
.kind
= 4;
9227 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9228 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9229 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9230 /* Set up arguments. */
9231 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9232 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9233 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9234 new_st
->expr1
->where
= code
->loc
;
9235 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9236 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9237 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9238 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9239 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9240 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9241 new_st
->next
= body
->next
;
9243 if (default_case
->next
)
9245 new_st
->block
= gfc_get_code (EXEC_IF
);
9246 new_st
= new_st
->block
;
9247 new_st
->next
= default_case
->next
;
9250 /* Replace CLASS DEFAULT code by the IF chain. */
9251 default_case
->next
= if_st
;
9254 /* Resolve the internal code. This can not be done earlier because
9255 it requires that the sym->assoc of selectors is set already. */
9256 gfc_current_ns
= ns
;
9257 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9258 gfc_current_ns
= old_ns
;
9265 /* Resolve a transfer statement. This is making sure that:
9266 -- a derived type being transferred has only non-pointer components
9267 -- a derived type being transferred doesn't have private components, unless
9268 it's being transferred from the module where the type was defined
9269 -- we're not trying to transfer a whole assumed size array. */
9272 resolve_transfer (gfc_code
*code
)
9275 gfc_symbol
*sym
, *derived
;
9279 bool formatted
= false;
9280 gfc_dt
*dt
= code
->ext
.dt
;
9281 gfc_symbol
*dtio_sub
= NULL
;
9285 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9286 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9287 exp
= exp
->value
.op
.op1
;
9289 if (exp
&& exp
->expr_type
== EXPR_NULL
9292 gfc_error ("Invalid context for NULL () intrinsic at %L",
9297 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9298 && exp
->expr_type
!= EXPR_FUNCTION
9299 && exp
->expr_type
!= EXPR_STRUCTURE
))
9302 /* If we are reading, the variable will be changed. Note that
9303 code->ext.dt may be NULL if the TRANSFER is related to
9304 an INQUIRE statement -- but in this case, we are not reading, either. */
9305 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9306 && !gfc_check_vardef_context (exp
, false, false, false,
9310 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9312 /* Go to actual component transferred. */
9313 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9314 if (ref
->type
== REF_COMPONENT
)
9315 ts
= &ref
->u
.c
.component
->ts
;
9317 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9318 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9320 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9321 derived
= ts
->u
.derived
;
9323 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9325 /* Determine when to use the formatted DTIO procedure. */
9326 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9329 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9330 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9331 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9333 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9336 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9337 /* Check to see if this is a nested DTIO call, with the
9338 dummy as the io-list object. */
9339 if (sym
&& sym
== dtio_sub
&& sym
->formal
9340 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9341 && exp
->ref
== NULL
)
9343 if (!sym
->attr
.recursive
)
9345 gfc_error ("DTIO %s procedure at %L must be recursive",
9346 sym
->name
, &sym
->declared_at
);
9353 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9355 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9356 "it is processed by a defined input/output procedure",
9361 if (ts
->type
== BT_DERIVED
)
9363 /* Check that transferred derived type doesn't contain POINTER
9364 components unless it is processed by a defined input/output
9366 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9368 gfc_error ("Data transfer element at %L cannot have POINTER "
9369 "components unless it is processed by a defined "
9370 "input/output procedure", &code
->loc
);
9375 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9377 gfc_error ("Data transfer element at %L cannot have "
9378 "procedure pointer components", &code
->loc
);
9382 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9384 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9385 "components unless it is processed by a defined "
9386 "input/output procedure", &code
->loc
);
9390 /* C_PTR and C_FUNPTR have private components which means they can not
9391 be printed. However, if -std=gnu and not -pedantic, allow
9392 the component to be printed to help debugging. */
9393 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9395 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9396 "cannot have PRIVATE components", &code
->loc
))
9399 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9401 gfc_error ("Data transfer element at %L cannot have "
9402 "PRIVATE components unless it is processed by "
9403 "a defined input/output procedure", &code
->loc
);
9408 if (exp
->expr_type
== EXPR_STRUCTURE
)
9411 sym
= exp
->symtree
->n
.sym
;
9413 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9414 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9416 gfc_error ("Data transfer element at %L cannot be a full reference to "
9417 "an assumed-size array", &code
->loc
);
9421 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9422 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9426 /*********** Toplevel code resolution subroutines ***********/
9428 /* Find the set of labels that are reachable from this block. We also
9429 record the last statement in each block. */
9432 find_reachable_labels (gfc_code
*block
)
9439 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9441 /* Collect labels in this block. We don't keep those corresponding
9442 to END {IF|SELECT}, these are checked in resolve_branch by going
9443 up through the code_stack. */
9444 for (c
= block
; c
; c
= c
->next
)
9446 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9447 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9450 /* Merge with labels from parent block. */
9453 gcc_assert (cs_base
->prev
->reachable_labels
);
9454 bitmap_ior_into (cs_base
->reachable_labels
,
9455 cs_base
->prev
->reachable_labels
);
9461 resolve_lock_unlock_event (gfc_code
*code
)
9463 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9464 && code
->expr1
->value
.function
.isym
9465 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9466 remove_caf_get_intrinsic (code
->expr1
);
9468 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9469 && (code
->expr1
->ts
.type
!= BT_DERIVED
9470 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9471 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9472 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9473 || code
->expr1
->rank
!= 0
9474 || (!gfc_is_coarray (code
->expr1
) &&
9475 !gfc_is_coindexed (code
->expr1
))))
9476 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9477 &code
->expr1
->where
);
9478 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9479 && (code
->expr1
->ts
.type
!= BT_DERIVED
9480 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9481 || code
->expr1
->ts
.u
.derived
->from_intmod
9482 != INTMOD_ISO_FORTRAN_ENV
9483 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9484 != ISOFORTRAN_EVENT_TYPE
9485 || code
->expr1
->rank
!= 0))
9486 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9487 &code
->expr1
->where
);
9488 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9489 && !gfc_is_coindexed (code
->expr1
))
9490 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9491 &code
->expr1
->where
);
9492 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9493 gfc_error ("Event variable argument at %L must be a coarray but not "
9494 "coindexed", &code
->expr1
->where
);
9498 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9499 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9500 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9501 &code
->expr2
->where
);
9504 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9505 _("STAT variable")))
9510 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9511 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9512 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9513 &code
->expr3
->where
);
9516 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9517 _("ERRMSG variable")))
9520 /* Check for LOCK the ACQUIRED_LOCK. */
9521 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9522 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9523 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9524 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9525 "variable", &code
->expr4
->where
);
9527 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9528 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9529 _("ACQUIRED_LOCK variable")))
9532 /* Check for EVENT WAIT the UNTIL_COUNT. */
9533 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9535 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9536 || code
->expr4
->rank
!= 0)
9537 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9538 "expression", &code
->expr4
->where
);
9544 resolve_critical (gfc_code
*code
)
9546 gfc_symtree
*symtree
;
9547 gfc_symbol
*lock_type
;
9548 char name
[GFC_MAX_SYMBOL_LEN
];
9549 static int serial
= 0;
9551 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9554 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9555 GFC_PREFIX ("lock_type"));
9557 lock_type
= symtree
->n
.sym
;
9560 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9563 lock_type
= symtree
->n
.sym
;
9564 lock_type
->attr
.flavor
= FL_DERIVED
;
9565 lock_type
->attr
.zero_comp
= 1;
9566 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9567 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9570 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9571 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9574 code
->resolved_sym
= symtree
->n
.sym
;
9575 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9576 symtree
->n
.sym
->attr
.referenced
= 1;
9577 symtree
->n
.sym
->attr
.artificial
= 1;
9578 symtree
->n
.sym
->attr
.codimension
= 1;
9579 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9580 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9581 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9582 symtree
->n
.sym
->as
->corank
= 1;
9583 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9584 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9585 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9587 gfc_commit_symbols();
9592 resolve_sync (gfc_code
*code
)
9594 /* Check imageset. The * case matches expr1 == NULL. */
9597 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9598 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9599 "INTEGER expression", &code
->expr1
->where
);
9600 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9601 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9602 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9603 &code
->expr1
->where
);
9604 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9605 && gfc_simplify_expr (code
->expr1
, 0))
9607 gfc_constructor
*cons
;
9608 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9609 for (; cons
; cons
= gfc_constructor_next (cons
))
9610 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9611 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9612 gfc_error ("Imageset argument at %L must between 1 and "
9613 "num_images()", &cons
->expr
->where
);
9618 gfc_resolve_expr (code
->expr2
);
9620 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9621 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9622 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9623 &code
->expr2
->where
);
9626 gfc_resolve_expr (code
->expr3
);
9628 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9629 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9630 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9631 &code
->expr3
->where
);
9635 /* Given a branch to a label, see if the branch is conforming.
9636 The code node describes where the branch is located. */
9639 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9646 /* Step one: is this a valid branching target? */
9648 if (label
->defined
== ST_LABEL_UNKNOWN
)
9650 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9655 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9657 gfc_error ("Statement at %L is not a valid branch target statement "
9658 "for the branch statement at %L", &label
->where
, &code
->loc
);
9662 /* Step two: make sure this branch is not a branch to itself ;-) */
9664 if (code
->here
== label
)
9667 "Branch at %L may result in an infinite loop", &code
->loc
);
9671 /* Step three: See if the label is in the same block as the
9672 branching statement. The hard work has been done by setting up
9673 the bitmap reachable_labels. */
9675 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9677 /* Check now whether there is a CRITICAL construct; if so, check
9678 whether the label is still visible outside of the CRITICAL block,
9679 which is invalid. */
9680 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9682 if (stack
->current
->op
== EXEC_CRITICAL
9683 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9684 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9685 "label at %L", &code
->loc
, &label
->where
);
9686 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9687 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9688 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9689 "for label at %L", &code
->loc
, &label
->where
);
9695 /* Step four: If we haven't found the label in the bitmap, it may
9696 still be the label of the END of the enclosing block, in which
9697 case we find it by going up the code_stack. */
9699 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9701 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9703 if (stack
->current
->op
== EXEC_CRITICAL
)
9705 /* Note: A label at END CRITICAL does not leave the CRITICAL
9706 construct as END CRITICAL is still part of it. */
9707 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9708 " at %L", &code
->loc
, &label
->where
);
9711 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9713 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9714 "label at %L", &code
->loc
, &label
->where
);
9721 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9725 /* The label is not in an enclosing block, so illegal. This was
9726 allowed in Fortran 66, so we allow it as extension. No
9727 further checks are necessary in this case. */
9728 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9729 "as the GOTO statement at %L", &label
->where
,
9735 /* Check whether EXPR1 has the same shape as EXPR2. */
9738 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9740 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9741 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9742 bool result
= false;
9745 /* Compare the rank. */
9746 if (expr1
->rank
!= expr2
->rank
)
9749 /* Compare the size of each dimension. */
9750 for (i
=0; i
<expr1
->rank
; i
++)
9752 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9755 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9758 if (mpz_cmp (shape
[i
], shape2
[i
]))
9762 /* When either of the two expression is an assumed size array, we
9763 ignore the comparison of dimension sizes. */
9768 gfc_clear_shape (shape
, i
);
9769 gfc_clear_shape (shape2
, i
);
9774 /* Check whether a WHERE assignment target or a WHERE mask expression
9775 has the same shape as the outmost WHERE mask expression. */
9778 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9784 cblock
= code
->block
;
9786 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9787 In case of nested WHERE, only the outmost one is stored. */
9788 if (mask
== NULL
) /* outmost WHERE */
9790 else /* inner WHERE */
9797 /* Check if the mask-expr has a consistent shape with the
9798 outmost WHERE mask-expr. */
9799 if (!resolve_where_shape (cblock
->expr1
, e
))
9800 gfc_error ("WHERE mask at %L has inconsistent shape",
9801 &cblock
->expr1
->where
);
9804 /* the assignment statement of a WHERE statement, or the first
9805 statement in where-body-construct of a WHERE construct */
9806 cnext
= cblock
->next
;
9811 /* WHERE assignment statement */
9814 /* Check shape consistent for WHERE assignment target. */
9815 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9816 gfc_error ("WHERE assignment target at %L has "
9817 "inconsistent shape", &cnext
->expr1
->where
);
9821 case EXEC_ASSIGN_CALL
:
9822 resolve_call (cnext
);
9823 if (!cnext
->resolved_sym
->attr
.elemental
)
9824 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9825 &cnext
->ext
.actual
->expr
->where
);
9828 /* WHERE or WHERE construct is part of a where-body-construct */
9830 resolve_where (cnext
, e
);
9834 gfc_error ("Unsupported statement inside WHERE at %L",
9837 /* the next statement within the same where-body-construct */
9838 cnext
= cnext
->next
;
9840 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9841 cblock
= cblock
->block
;
9846 /* Resolve assignment in FORALL construct.
9847 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9848 FORALL index variables. */
9851 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9855 for (n
= 0; n
< nvar
; n
++)
9857 gfc_symbol
*forall_index
;
9859 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9861 /* Check whether the assignment target is one of the FORALL index
9863 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9864 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9865 gfc_error ("Assignment to a FORALL index variable at %L",
9866 &code
->expr1
->where
);
9869 /* If one of the FORALL index variables doesn't appear in the
9870 assignment variable, then there could be a many-to-one
9871 assignment. Emit a warning rather than an error because the
9872 mask could be resolving this problem. */
9873 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9874 gfc_warning (0, "The FORALL with index %qs is not used on the "
9875 "left side of the assignment at %L and so might "
9876 "cause multiple assignment to this object",
9877 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9883 /* Resolve WHERE statement in FORALL construct. */
9886 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9887 gfc_expr
**var_expr
)
9892 cblock
= code
->block
;
9895 /* the assignment statement of a WHERE statement, or the first
9896 statement in where-body-construct of a WHERE construct */
9897 cnext
= cblock
->next
;
9902 /* WHERE assignment statement */
9904 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9907 /* WHERE operator assignment statement */
9908 case EXEC_ASSIGN_CALL
:
9909 resolve_call (cnext
);
9910 if (!cnext
->resolved_sym
->attr
.elemental
)
9911 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9912 &cnext
->ext
.actual
->expr
->where
);
9915 /* WHERE or WHERE construct is part of a where-body-construct */
9917 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9921 gfc_error ("Unsupported statement inside WHERE at %L",
9924 /* the next statement within the same where-body-construct */
9925 cnext
= cnext
->next
;
9927 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9928 cblock
= cblock
->block
;
9933 /* Traverse the FORALL body to check whether the following errors exist:
9934 1. For assignment, check if a many-to-one assignment happens.
9935 2. For WHERE statement, check the WHERE body to see if there is any
9936 many-to-one assignment. */
9939 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9943 c
= code
->block
->next
;
9949 case EXEC_POINTER_ASSIGN
:
9950 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9953 case EXEC_ASSIGN_CALL
:
9957 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9958 there is no need to handle it here. */
9962 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9967 /* The next statement in the FORALL body. */
9973 /* Counts the number of iterators needed inside a forall construct, including
9974 nested forall constructs. This is used to allocate the needed memory
9975 in gfc_resolve_forall. */
9978 gfc_count_forall_iterators (gfc_code
*code
)
9980 int max_iters
, sub_iters
, current_iters
;
9981 gfc_forall_iterator
*fa
;
9983 gcc_assert(code
->op
== EXEC_FORALL
);
9987 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9990 code
= code
->block
->next
;
9994 if (code
->op
== EXEC_FORALL
)
9996 sub_iters
= gfc_count_forall_iterators (code
);
9997 if (sub_iters
> max_iters
)
9998 max_iters
= sub_iters
;
10003 return current_iters
+ max_iters
;
10007 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10008 gfc_resolve_forall_body to resolve the FORALL body. */
10011 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10013 static gfc_expr
**var_expr
;
10014 static int total_var
= 0;
10015 static int nvar
= 0;
10016 int i
, old_nvar
, tmp
;
10017 gfc_forall_iterator
*fa
;
10021 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10024 /* Start to resolve a FORALL construct */
10025 if (forall_save
== 0)
10027 /* Count the total number of FORALL indices in the nested FORALL
10028 construct in order to allocate the VAR_EXPR with proper size. */
10029 total_var
= gfc_count_forall_iterators (code
);
10031 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10032 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10035 /* The information about FORALL iterator, including FORALL indices start, end
10036 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10037 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10039 /* Fortran 20008: C738 (R753). */
10040 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10042 gfc_error ("FORALL index-name at %L must be a scalar variable "
10043 "of type integer", &fa
->var
->where
);
10047 /* Check if any outer FORALL index name is the same as the current
10049 for (i
= 0; i
< nvar
; i
++)
10051 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10052 gfc_error ("An outer FORALL construct already has an index "
10053 "with this name %L", &fa
->var
->where
);
10056 /* Record the current FORALL index. */
10057 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10061 /* No memory leak. */
10062 gcc_assert (nvar
<= total_var
);
10065 /* Resolve the FORALL body. */
10066 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10068 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10069 gfc_resolve_blocks (code
->block
, ns
);
10073 /* Free only the VAR_EXPRs allocated in this frame. */
10074 for (i
= nvar
; i
< tmp
; i
++)
10075 gfc_free_expr (var_expr
[i
]);
10079 /* We are in the outermost FORALL construct. */
10080 gcc_assert (forall_save
== 0);
10082 /* VAR_EXPR is not needed any more. */
10089 /* Resolve a BLOCK construct statement. */
10092 resolve_block_construct (gfc_code
* code
)
10094 /* Resolve the BLOCK's namespace. */
10095 gfc_resolve (code
->ext
.block
.ns
);
10097 /* For an ASSOCIATE block, the associations (and their targets) are already
10098 resolved during resolve_symbol. */
10102 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10106 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10110 for (; b
; b
= b
->block
)
10112 t
= gfc_resolve_expr (b
->expr1
);
10113 if (!gfc_resolve_expr (b
->expr2
))
10119 if (t
&& b
->expr1
!= NULL
10120 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10121 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10127 && b
->expr1
!= NULL
10128 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10129 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10134 resolve_branch (b
->label1
, b
);
10138 resolve_block_construct (b
);
10142 case EXEC_SELECT_TYPE
:
10145 case EXEC_DO_WHILE
:
10146 case EXEC_DO_CONCURRENT
:
10147 case EXEC_CRITICAL
:
10150 case EXEC_IOLENGTH
:
10154 case EXEC_OMP_ATOMIC
:
10155 case EXEC_OACC_ATOMIC
:
10157 gfc_omp_atomic_op aop
10158 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10160 /* Verify this before calling gfc_resolve_code, which might
10162 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10163 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10164 && b
->next
->next
== NULL
)
10165 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10166 && b
->next
->next
!= NULL
10167 && b
->next
->next
->op
== EXEC_ASSIGN
10168 && b
->next
->next
->next
== NULL
));
10172 case EXEC_OACC_PARALLEL_LOOP
:
10173 case EXEC_OACC_PARALLEL
:
10174 case EXEC_OACC_KERNELS_LOOP
:
10175 case EXEC_OACC_KERNELS
:
10176 case EXEC_OACC_DATA
:
10177 case EXEC_OACC_HOST_DATA
:
10178 case EXEC_OACC_LOOP
:
10179 case EXEC_OACC_UPDATE
:
10180 case EXEC_OACC_WAIT
:
10181 case EXEC_OACC_CACHE
:
10182 case EXEC_OACC_ENTER_DATA
:
10183 case EXEC_OACC_EXIT_DATA
:
10184 case EXEC_OACC_ROUTINE
:
10185 case EXEC_OMP_CRITICAL
:
10186 case EXEC_OMP_DISTRIBUTE
:
10187 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10188 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10189 case EXEC_OMP_DISTRIBUTE_SIMD
:
10191 case EXEC_OMP_DO_SIMD
:
10192 case EXEC_OMP_MASTER
:
10193 case EXEC_OMP_ORDERED
:
10194 case EXEC_OMP_PARALLEL
:
10195 case EXEC_OMP_PARALLEL_DO
:
10196 case EXEC_OMP_PARALLEL_DO_SIMD
:
10197 case EXEC_OMP_PARALLEL_SECTIONS
:
10198 case EXEC_OMP_PARALLEL_WORKSHARE
:
10199 case EXEC_OMP_SECTIONS
:
10200 case EXEC_OMP_SIMD
:
10201 case EXEC_OMP_SINGLE
:
10202 case EXEC_OMP_TARGET
:
10203 case EXEC_OMP_TARGET_DATA
:
10204 case EXEC_OMP_TARGET_ENTER_DATA
:
10205 case EXEC_OMP_TARGET_EXIT_DATA
:
10206 case EXEC_OMP_TARGET_PARALLEL
:
10207 case EXEC_OMP_TARGET_PARALLEL_DO
:
10208 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10209 case EXEC_OMP_TARGET_SIMD
:
10210 case EXEC_OMP_TARGET_TEAMS
:
10211 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10212 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10213 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10214 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10215 case EXEC_OMP_TARGET_UPDATE
:
10216 case EXEC_OMP_TASK
:
10217 case EXEC_OMP_TASKGROUP
:
10218 case EXEC_OMP_TASKLOOP
:
10219 case EXEC_OMP_TASKLOOP_SIMD
:
10220 case EXEC_OMP_TASKWAIT
:
10221 case EXEC_OMP_TASKYIELD
:
10222 case EXEC_OMP_TEAMS
:
10223 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10224 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10225 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10226 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10227 case EXEC_OMP_WORKSHARE
:
10231 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10234 gfc_resolve_code (b
->next
, ns
);
10239 /* Does everything to resolve an ordinary assignment. Returns true
10240 if this is an interface assignment. */
10242 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10249 symbol_attribute attr
;
10251 if (gfc_extend_assign (code
, ns
))
10255 if (code
->op
== EXEC_ASSIGN_CALL
)
10257 lhs
= code
->ext
.actual
->expr
;
10258 rhsptr
= &code
->ext
.actual
->next
->expr
;
10262 gfc_actual_arglist
* args
;
10263 gfc_typebound_proc
* tbp
;
10265 gcc_assert (code
->op
== EXEC_COMPCALL
);
10267 args
= code
->expr1
->value
.compcall
.actual
;
10269 rhsptr
= &args
->next
->expr
;
10271 tbp
= code
->expr1
->value
.compcall
.tbp
;
10272 gcc_assert (!tbp
->is_generic
);
10275 /* Make a temporary rhs when there is a default initializer
10276 and rhs is the same symbol as the lhs. */
10277 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10278 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10279 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10280 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10281 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10290 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10291 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10295 /* Handle the case of a BOZ literal on the RHS. */
10296 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10299 if (warn_surprising
)
10300 gfc_warning (OPT_Wsurprising
,
10301 "BOZ literal at %L is bitwise transferred "
10302 "non-integer symbol %qs", &code
->loc
,
10303 lhs
->symtree
->n
.sym
->name
);
10305 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10307 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10309 if (rc
== ARITH_UNDERFLOW
)
10310 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10311 ". This check can be disabled with the option "
10312 "%<-fno-range-check%>", &rhs
->where
);
10313 else if (rc
== ARITH_OVERFLOW
)
10314 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10315 ". This check can be disabled with the option "
10316 "%<-fno-range-check%>", &rhs
->where
);
10317 else if (rc
== ARITH_NAN
)
10318 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10319 ". This check can be disabled with the option "
10320 "%<-fno-range-check%>", &rhs
->where
);
10325 if (lhs
->ts
.type
== BT_CHARACTER
10326 && warn_character_truncation
)
10328 HOST_WIDE_INT llen
= 0, rlen
= 0;
10329 if (lhs
->ts
.u
.cl
!= NULL
10330 && lhs
->ts
.u
.cl
->length
!= NULL
10331 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10332 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10334 if (rhs
->expr_type
== EXPR_CONSTANT
)
10335 rlen
= rhs
->value
.character
.length
;
10337 else if (rhs
->ts
.u
.cl
!= NULL
10338 && rhs
->ts
.u
.cl
->length
!= NULL
10339 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10340 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10342 if (rlen
&& llen
&& rlen
> llen
)
10343 gfc_warning_now (OPT_Wcharacter_truncation
,
10344 "CHARACTER expression will be truncated "
10345 "in assignment (%ld/%ld) at %L",
10346 (long) llen
, (long) rlen
, &code
->loc
);
10349 /* Ensure that a vector index expression for the lvalue is evaluated
10350 to a temporary if the lvalue symbol is referenced in it. */
10353 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10354 if (ref
->type
== REF_ARRAY
)
10356 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10357 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10358 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10359 ref
->u
.ar
.start
[n
]))
10361 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10365 if (gfc_pure (NULL
))
10367 if (lhs
->ts
.type
== BT_DERIVED
10368 && lhs
->expr_type
== EXPR_VARIABLE
10369 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10370 && rhs
->expr_type
== EXPR_VARIABLE
10371 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10372 || gfc_is_coindexed (rhs
)))
10374 /* F2008, C1283. */
10375 if (gfc_is_coindexed (rhs
))
10376 gfc_error ("Coindexed expression at %L is assigned to "
10377 "a derived type variable with a POINTER "
10378 "component in a PURE procedure",
10381 gfc_error ("The impure variable at %L is assigned to "
10382 "a derived type variable with a POINTER "
10383 "component in a PURE procedure (12.6)",
10388 /* Fortran 2008, C1283. */
10389 if (gfc_is_coindexed (lhs
))
10391 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10392 "procedure", &rhs
->where
);
10397 if (gfc_implicit_pure (NULL
))
10399 if (lhs
->expr_type
== EXPR_VARIABLE
10400 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10401 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10402 gfc_unset_implicit_pure (NULL
);
10404 if (lhs
->ts
.type
== BT_DERIVED
10405 && lhs
->expr_type
== EXPR_VARIABLE
10406 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10407 && rhs
->expr_type
== EXPR_VARIABLE
10408 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10409 || gfc_is_coindexed (rhs
)))
10410 gfc_unset_implicit_pure (NULL
);
10412 /* Fortran 2008, C1283. */
10413 if (gfc_is_coindexed (lhs
))
10414 gfc_unset_implicit_pure (NULL
);
10417 /* F2008, 7.2.1.2. */
10418 attr
= gfc_expr_attr (lhs
);
10419 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10421 if (attr
.codimension
)
10423 gfc_error ("Assignment to polymorphic coarray at %L is not "
10424 "permitted", &lhs
->where
);
10427 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10428 "polymorphic variable at %L", &lhs
->where
))
10430 if (!flag_realloc_lhs
)
10432 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10433 "requires %<-frealloc-lhs%>", &lhs
->where
);
10437 else if (lhs
->ts
.type
== BT_CLASS
)
10439 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10440 "assignment at %L - check that there is a matching specific "
10441 "subroutine for '=' operator", &lhs
->where
);
10445 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10447 /* F2008, Section 7.2.1.2. */
10448 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10450 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10451 "component in assignment at %L", &lhs
->where
);
10455 /* Assign the 'data' of a class object to a derived type. */
10456 if (lhs
->ts
.type
== BT_DERIVED
10457 && rhs
->ts
.type
== BT_CLASS
10458 && rhs
->expr_type
!= EXPR_ARRAY
)
10459 gfc_add_data_component (rhs
);
10461 /* Make sure there is a vtable and, in particular, a _copy for the
10463 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10464 gfc_find_vtab (&rhs
->ts
);
10466 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10468 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10469 && code
->expr2
->value
.function
.isym
10470 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10471 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10472 && !gfc_expr_attr (rhs
).allocatable
10473 && !gfc_has_vector_subscript (rhs
)));
10475 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10477 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10478 Additionally, insert this code when the RHS is a CAF as we then use the
10479 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10480 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10481 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10483 if (caf_convert_to_send
)
10485 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10486 && code
->expr2
->value
.function
.isym
10487 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10488 remove_caf_get_intrinsic (code
->expr2
);
10489 code
->op
= EXEC_CALL
;
10490 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10491 code
->resolved_sym
= code
->symtree
->n
.sym
;
10492 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10493 code
->resolved_sym
->attr
.intrinsic
= 1;
10494 code
->resolved_sym
->attr
.subroutine
= 1;
10495 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10496 gfc_commit_symbol (code
->resolved_sym
);
10497 code
->ext
.actual
= gfc_get_actual_arglist ();
10498 code
->ext
.actual
->expr
= lhs
;
10499 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10500 code
->ext
.actual
->next
->expr
= rhs
;
10501 code
->expr1
= NULL
;
10502 code
->expr2
= NULL
;
10509 /* Add a component reference onto an expression. */
10512 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10517 ref
= &((*ref
)->next
);
10518 *ref
= gfc_get_ref ();
10519 (*ref
)->type
= REF_COMPONENT
;
10520 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10521 (*ref
)->u
.c
.component
= c
;
10524 /* Add a full array ref, as necessary. */
10527 gfc_add_full_array_ref (e
, c
->as
);
10528 e
->rank
= c
->as
->rank
;
10533 /* Build an assignment. Keep the argument 'op' for future use, so that
10534 pointer assignments can be made. */
10537 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10538 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10540 gfc_code
*this_code
;
10542 this_code
= gfc_get_code (op
);
10543 this_code
->next
= NULL
;
10544 this_code
->expr1
= gfc_copy_expr (expr1
);
10545 this_code
->expr2
= gfc_copy_expr (expr2
);
10546 this_code
->loc
= loc
;
10547 if (comp1
&& comp2
)
10549 add_comp_ref (this_code
->expr1
, comp1
);
10550 add_comp_ref (this_code
->expr2
, comp2
);
10557 /* Makes a temporary variable expression based on the characteristics of
10558 a given variable expression. */
10561 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10563 static int serial
= 0;
10564 char name
[GFC_MAX_SYMBOL_LEN
];
10566 gfc_array_spec
*as
;
10567 gfc_array_ref
*aref
;
10570 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10571 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10572 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10578 /* Obtain the arrayspec for the temporary. */
10579 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10580 && e
->expr_type
!= EXPR_FUNCTION
10581 && e
->expr_type
!= EXPR_OP
)
10583 aref
= gfc_find_array_ref (e
);
10584 if (e
->expr_type
== EXPR_VARIABLE
10585 && e
->symtree
->n
.sym
->as
== aref
->as
)
10589 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10590 if (ref
->type
== REF_COMPONENT
10591 && ref
->u
.c
.component
->as
== aref
->as
)
10599 /* Add the attributes and the arrayspec to the temporary. */
10600 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10601 tmp
->n
.sym
->attr
.function
= 0;
10602 tmp
->n
.sym
->attr
.result
= 0;
10603 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10604 tmp
->n
.sym
->attr
.dummy
= 0;
10605 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10609 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10612 if (as
->type
== AS_DEFERRED
)
10613 tmp
->n
.sym
->attr
.allocatable
= 1;
10615 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10616 || e
->expr_type
== EXPR_FUNCTION
10617 || e
->expr_type
== EXPR_OP
))
10619 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10620 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10621 tmp
->n
.sym
->as
->rank
= e
->rank
;
10622 tmp
->n
.sym
->attr
.allocatable
= 1;
10623 tmp
->n
.sym
->attr
.dimension
= 1;
10626 tmp
->n
.sym
->attr
.dimension
= 0;
10628 gfc_set_sym_referenced (tmp
->n
.sym
);
10629 gfc_commit_symbol (tmp
->n
.sym
);
10630 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10632 /* Should the lhs be a section, use its array ref for the
10633 temporary expression. */
10634 if (aref
&& aref
->type
!= AR_FULL
)
10636 gfc_free_ref_list (e
->ref
);
10637 e
->ref
= gfc_copy_ref (ref
);
10643 /* Add one line of code to the code chain, making sure that 'head' and
10644 'tail' are appropriately updated. */
10647 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10649 gcc_assert (this_code
);
10651 *head
= *tail
= *this_code
;
10653 *tail
= gfc_append_code (*tail
, *this_code
);
10658 /* Counts the potential number of part array references that would
10659 result from resolution of typebound defined assignments. */
10662 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10665 int c_depth
= 0, t_depth
;
10667 for (c
= derived
->components
; c
; c
= c
->next
)
10669 if ((!gfc_bt_struct (c
->ts
.type
)
10671 || c
->attr
.allocatable
10672 || c
->attr
.proc_pointer_comp
10673 || c
->attr
.class_pointer
10674 || c
->attr
.proc_pointer
)
10675 && !c
->attr
.defined_assign_comp
)
10678 if (c
->as
&& c_depth
== 0)
10681 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10682 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10687 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10689 return depth
+ c_depth
;
10693 /* Implement 7.2.1.3 of the F08 standard:
10694 "An intrinsic assignment where the variable is of derived type is
10695 performed as if each component of the variable were assigned from the
10696 corresponding component of expr using pointer assignment (7.2.2) for
10697 each pointer component, defined assignment for each nonpointer
10698 nonallocatable component of a type that has a type-bound defined
10699 assignment consistent with the component, intrinsic assignment for
10700 each other nonpointer nonallocatable component, ..."
10702 The pointer assignments are taken care of by the intrinsic
10703 assignment of the structure itself. This function recursively adds
10704 defined assignments where required. The recursion is accomplished
10705 by calling gfc_resolve_code.
10707 When the lhs in a defined assignment has intent INOUT, we need a
10708 temporary for the lhs. In pseudo-code:
10710 ! Only call function lhs once.
10711 if (lhs is not a constant or an variable)
10714 ! Do the intrinsic assignment
10716 ! Now do the defined assignments
10717 do over components with typebound defined assignment [%cmp]
10718 #if one component's assignment procedure is INOUT
10720 #if expr2 non-variable
10726 t1%cmp {defined=} expr2%cmp
10732 expr1%cmp {defined=} expr2%cmp
10736 /* The temporary assignments have to be put on top of the additional
10737 code to avoid the result being changed by the intrinsic assignment.
10739 static int component_assignment_level
= 0;
10740 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10743 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10745 gfc_component
*comp1
, *comp2
;
10746 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10748 int error_count
, depth
;
10750 gfc_get_errors (NULL
, &error_count
);
10752 /* Filter out continuing processing after an error. */
10754 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10755 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10758 /* TODO: Handle more than one part array reference in assignments. */
10759 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10760 (*code
)->expr1
->rank
? 1 : 0);
10763 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10764 "done because multiple part array references would "
10765 "occur in intermediate expressions.", &(*code
)->loc
);
10769 component_assignment_level
++;
10771 /* Create a temporary so that functions get called only once. */
10772 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10773 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10775 gfc_expr
*tmp_expr
;
10777 /* Assign the rhs to the temporary. */
10778 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10779 this_code
= build_assignment (EXEC_ASSIGN
,
10780 tmp_expr
, (*code
)->expr2
,
10781 NULL
, NULL
, (*code
)->loc
);
10782 /* Add the code and substitute the rhs expression. */
10783 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10784 gfc_free_expr ((*code
)->expr2
);
10785 (*code
)->expr2
= tmp_expr
;
10788 /* Do the intrinsic assignment. This is not needed if the lhs is one
10789 of the temporaries generated here, since the intrinsic assignment
10790 to the final result already does this. */
10791 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10793 this_code
= build_assignment (EXEC_ASSIGN
,
10794 (*code
)->expr1
, (*code
)->expr2
,
10795 NULL
, NULL
, (*code
)->loc
);
10796 add_code_to_chain (&this_code
, &head
, &tail
);
10799 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10800 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10803 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10805 bool inout
= false;
10807 /* The intrinsic assignment does the right thing for pointers
10808 of all kinds and allocatable components. */
10809 if (!gfc_bt_struct (comp1
->ts
.type
)
10810 || comp1
->attr
.pointer
10811 || comp1
->attr
.allocatable
10812 || comp1
->attr
.proc_pointer_comp
10813 || comp1
->attr
.class_pointer
10814 || comp1
->attr
.proc_pointer
)
10817 /* Make an assigment for this component. */
10818 this_code
= build_assignment (EXEC_ASSIGN
,
10819 (*code
)->expr1
, (*code
)->expr2
,
10820 comp1
, comp2
, (*code
)->loc
);
10822 /* Convert the assignment if there is a defined assignment for
10823 this type. Otherwise, using the call from gfc_resolve_code,
10824 recurse into its components. */
10825 gfc_resolve_code (this_code
, ns
);
10827 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10829 gfc_formal_arglist
*dummy_args
;
10831 /* Check that there is a typebound defined assignment. If not,
10832 then this must be a module defined assignment. We cannot
10833 use the defined_assign_comp attribute here because it must
10834 be this derived type that has the defined assignment and not
10836 if (!(comp1
->ts
.u
.derived
->f2k_derived
10837 && comp1
->ts
.u
.derived
->f2k_derived
10838 ->tb_op
[INTRINSIC_ASSIGN
]))
10840 gfc_free_statements (this_code
);
10845 /* If the first argument of the subroutine has intent INOUT
10846 a temporary must be generated and used instead. */
10847 rsym
= this_code
->resolved_sym
;
10848 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10850 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10852 gfc_code
*temp_code
;
10855 /* Build the temporary required for the assignment and put
10856 it at the head of the generated code. */
10859 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10860 temp_code
= build_assignment (EXEC_ASSIGN
,
10861 t1
, (*code
)->expr1
,
10862 NULL
, NULL
, (*code
)->loc
);
10864 /* For allocatable LHS, check whether it is allocated. Note
10865 that allocatable components with defined assignment are
10866 not yet support. See PR 57696. */
10867 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10871 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10872 block
= gfc_get_code (EXEC_IF
);
10873 block
->block
= gfc_get_code (EXEC_IF
);
10874 block
->block
->expr1
10875 = gfc_build_intrinsic_call (ns
,
10876 GFC_ISYM_ALLOCATED
, "allocated",
10877 (*code
)->loc
, 1, e
);
10878 block
->block
->next
= temp_code
;
10881 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10884 /* Replace the first actual arg with the component of the
10886 gfc_free_expr (this_code
->ext
.actual
->expr
);
10887 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10888 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10890 /* If the LHS variable is allocatable and wasn't allocated and
10891 the temporary is allocatable, pointer assign the address of
10892 the freshly allocated LHS to the temporary. */
10893 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10894 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10899 cond
= gfc_get_expr ();
10900 cond
->ts
.type
= BT_LOGICAL
;
10901 cond
->ts
.kind
= gfc_default_logical_kind
;
10902 cond
->expr_type
= EXPR_OP
;
10903 cond
->where
= (*code
)->loc
;
10904 cond
->value
.op
.op
= INTRINSIC_NOT
;
10905 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10906 GFC_ISYM_ALLOCATED
, "allocated",
10907 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10908 block
= gfc_get_code (EXEC_IF
);
10909 block
->block
= gfc_get_code (EXEC_IF
);
10910 block
->block
->expr1
= cond
;
10911 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10912 t1
, (*code
)->expr1
,
10913 NULL
, NULL
, (*code
)->loc
);
10914 add_code_to_chain (&block
, &head
, &tail
);
10918 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10920 /* Don't add intrinsic assignments since they are already
10921 effected by the intrinsic assignment of the structure. */
10922 gfc_free_statements (this_code
);
10927 add_code_to_chain (&this_code
, &head
, &tail
);
10931 /* Transfer the value to the final result. */
10932 this_code
= build_assignment (EXEC_ASSIGN
,
10933 (*code
)->expr1
, t1
,
10934 comp1
, comp2
, (*code
)->loc
);
10935 add_code_to_chain (&this_code
, &head
, &tail
);
10939 /* Put the temporary assignments at the top of the generated code. */
10940 if (tmp_head
&& component_assignment_level
== 1)
10942 gfc_append_code (tmp_head
, head
);
10944 tmp_head
= tmp_tail
= NULL
;
10947 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10948 // not accidentally deallocated. Hence, nullify t1.
10949 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10950 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10956 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10957 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10958 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10959 block
= gfc_get_code (EXEC_IF
);
10960 block
->block
= gfc_get_code (EXEC_IF
);
10961 block
->block
->expr1
= cond
;
10962 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10963 t1
, gfc_get_null_expr (&(*code
)->loc
),
10964 NULL
, NULL
, (*code
)->loc
);
10965 gfc_append_code (tail
, block
);
10969 /* Now attach the remaining code chain to the input code. Step on
10970 to the end of the new code since resolution is complete. */
10971 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10972 tail
->next
= (*code
)->next
;
10973 /* Overwrite 'code' because this would place the intrinsic assignment
10974 before the temporary for the lhs is created. */
10975 gfc_free_expr ((*code
)->expr1
);
10976 gfc_free_expr ((*code
)->expr2
);
10982 component_assignment_level
--;
10986 /* F2008: Pointer function assignments are of the form:
10987 ptr_fcn (args) = expr
10988 This function breaks these assignments into two statements:
10989 temporary_pointer => ptr_fcn(args)
10990 temporary_pointer = expr */
10993 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10995 gfc_expr
*tmp_ptr_expr
;
10996 gfc_code
*this_code
;
10997 gfc_component
*comp
;
11000 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11003 /* Even if standard does not support this feature, continue to build
11004 the two statements to avoid upsetting frontend_passes.c. */
11005 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11006 "%L", &(*code
)->loc
);
11008 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11011 s
= comp
->ts
.interface
;
11013 s
= (*code
)->expr1
->symtree
->n
.sym
;
11015 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11017 gfc_error ("The function result on the lhs of the assignment at "
11018 "%L must have the pointer attribute.",
11019 &(*code
)->expr1
->where
);
11020 (*code
)->op
= EXEC_NOP
;
11024 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11026 /* get_temp_from_expression is set up for ordinary assignments. To that
11027 end, where array bounds are not known, arrays are made allocatable.
11028 Change the temporary to a pointer here. */
11029 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11030 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11031 tmp_ptr_expr
->where
= (*code
)->loc
;
11033 this_code
= build_assignment (EXEC_ASSIGN
,
11034 tmp_ptr_expr
, (*code
)->expr2
,
11035 NULL
, NULL
, (*code
)->loc
);
11036 this_code
->next
= (*code
)->next
;
11037 (*code
)->next
= this_code
;
11038 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11039 (*code
)->expr2
= (*code
)->expr1
;
11040 (*code
)->expr1
= tmp_ptr_expr
;
11046 /* Deferred character length assignments from an operator expression
11047 require a temporary because the character length of the lhs can
11048 change in the course of the assignment. */
11051 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11053 gfc_expr
*tmp_expr
;
11054 gfc_code
*this_code
;
11056 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11057 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11058 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11061 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11064 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11065 tmp_expr
->where
= (*code
)->loc
;
11067 /* A new charlen is required to ensure that the variable string
11068 length is different to that of the original lhs. */
11069 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11070 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11071 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11072 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11074 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11076 this_code
= build_assignment (EXEC_ASSIGN
,
11078 gfc_copy_expr (tmp_expr
),
11079 NULL
, NULL
, (*code
)->loc
);
11081 (*code
)->expr1
= tmp_expr
;
11083 this_code
->next
= (*code
)->next
;
11084 (*code
)->next
= this_code
;
11090 /* Given a block of code, recursively resolve everything pointed to by this
11094 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11096 int omp_workshare_save
;
11097 int forall_save
, do_concurrent_save
;
11101 frame
.prev
= cs_base
;
11105 find_reachable_labels (code
);
11107 for (; code
; code
= code
->next
)
11109 frame
.current
= code
;
11110 forall_save
= forall_flag
;
11111 do_concurrent_save
= gfc_do_concurrent_flag
;
11113 if (code
->op
== EXEC_FORALL
)
11116 gfc_resolve_forall (code
, ns
, forall_save
);
11119 else if (code
->block
)
11121 omp_workshare_save
= -1;
11124 case EXEC_OACC_PARALLEL_LOOP
:
11125 case EXEC_OACC_PARALLEL
:
11126 case EXEC_OACC_KERNELS_LOOP
:
11127 case EXEC_OACC_KERNELS
:
11128 case EXEC_OACC_DATA
:
11129 case EXEC_OACC_HOST_DATA
:
11130 case EXEC_OACC_LOOP
:
11131 gfc_resolve_oacc_blocks (code
, ns
);
11133 case EXEC_OMP_PARALLEL_WORKSHARE
:
11134 omp_workshare_save
= omp_workshare_flag
;
11135 omp_workshare_flag
= 1;
11136 gfc_resolve_omp_parallel_blocks (code
, ns
);
11138 case EXEC_OMP_PARALLEL
:
11139 case EXEC_OMP_PARALLEL_DO
:
11140 case EXEC_OMP_PARALLEL_DO_SIMD
:
11141 case EXEC_OMP_PARALLEL_SECTIONS
:
11142 case EXEC_OMP_TARGET_PARALLEL
:
11143 case EXEC_OMP_TARGET_PARALLEL_DO
:
11144 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11145 case EXEC_OMP_TARGET_TEAMS
:
11146 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11147 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11148 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11149 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11150 case EXEC_OMP_TASK
:
11151 case EXEC_OMP_TASKLOOP
:
11152 case EXEC_OMP_TASKLOOP_SIMD
:
11153 case EXEC_OMP_TEAMS
:
11154 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11155 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11156 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11157 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11158 omp_workshare_save
= omp_workshare_flag
;
11159 omp_workshare_flag
= 0;
11160 gfc_resolve_omp_parallel_blocks (code
, ns
);
11162 case EXEC_OMP_DISTRIBUTE
:
11163 case EXEC_OMP_DISTRIBUTE_SIMD
:
11165 case EXEC_OMP_DO_SIMD
:
11166 case EXEC_OMP_SIMD
:
11167 case EXEC_OMP_TARGET_SIMD
:
11168 gfc_resolve_omp_do_blocks (code
, ns
);
11170 case EXEC_SELECT_TYPE
:
11171 /* Blocks are handled in resolve_select_type because we have
11172 to transform the SELECT TYPE into ASSOCIATE first. */
11174 case EXEC_DO_CONCURRENT
:
11175 gfc_do_concurrent_flag
= 1;
11176 gfc_resolve_blocks (code
->block
, ns
);
11177 gfc_do_concurrent_flag
= 2;
11179 case EXEC_OMP_WORKSHARE
:
11180 omp_workshare_save
= omp_workshare_flag
;
11181 omp_workshare_flag
= 1;
11184 gfc_resolve_blocks (code
->block
, ns
);
11188 if (omp_workshare_save
!= -1)
11189 omp_workshare_flag
= omp_workshare_save
;
11193 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11194 t
= gfc_resolve_expr (code
->expr1
);
11195 forall_flag
= forall_save
;
11196 gfc_do_concurrent_flag
= do_concurrent_save
;
11198 if (!gfc_resolve_expr (code
->expr2
))
11201 if (code
->op
== EXEC_ALLOCATE
11202 && !gfc_resolve_expr (code
->expr3
))
11208 case EXEC_END_BLOCK
:
11209 case EXEC_END_NESTED_BLOCK
:
11213 case EXEC_ERROR_STOP
:
11215 case EXEC_CONTINUE
:
11217 case EXEC_ASSIGN_CALL
:
11220 case EXEC_CRITICAL
:
11221 resolve_critical (code
);
11224 case EXEC_SYNC_ALL
:
11225 case EXEC_SYNC_IMAGES
:
11226 case EXEC_SYNC_MEMORY
:
11227 resolve_sync (code
);
11232 case EXEC_EVENT_POST
:
11233 case EXEC_EVENT_WAIT
:
11234 resolve_lock_unlock_event (code
);
11237 case EXEC_FAIL_IMAGE
:
11238 case EXEC_FORM_TEAM
:
11239 case EXEC_CHANGE_TEAM
:
11240 case EXEC_END_TEAM
:
11241 case EXEC_SYNC_TEAM
:
11245 /* Keep track of which entry we are up to. */
11246 current_entry_id
= code
->ext
.entry
->id
;
11250 resolve_where (code
, NULL
);
11254 if (code
->expr1
!= NULL
)
11256 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11257 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11258 "INTEGER variable", &code
->expr1
->where
);
11259 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11260 gfc_error ("Variable %qs has not been assigned a target "
11261 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11262 &code
->expr1
->where
);
11265 resolve_branch (code
->label1
, code
);
11269 if (code
->expr1
!= NULL
11270 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11271 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11272 "INTEGER return specifier", &code
->expr1
->where
);
11275 case EXEC_INIT_ASSIGN
:
11276 case EXEC_END_PROCEDURE
:
11283 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11285 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11286 && code
->expr1
->value
.function
.isym
11287 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11288 remove_caf_get_intrinsic (code
->expr1
);
11290 /* If this is a pointer function in an lvalue variable context,
11291 the new code will have to be resolved afresh. This is also the
11292 case with an error, where the code is transformed into NOP to
11293 prevent ICEs downstream. */
11294 if (resolve_ptr_fcn_assign (&code
, ns
)
11295 || code
->op
== EXEC_NOP
)
11298 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11302 if (resolve_ordinary_assign (code
, ns
))
11304 if (code
->op
== EXEC_COMPCALL
)
11310 /* Check for dependencies in deferred character length array
11311 assignments and generate a temporary, if necessary. */
11312 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11315 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11316 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11317 && code
->expr1
->ts
.u
.derived
11318 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11319 generate_component_assignments (&code
, ns
);
11323 case EXEC_LABEL_ASSIGN
:
11324 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11325 gfc_error ("Label %d referenced at %L is never defined",
11326 code
->label1
->value
, &code
->label1
->where
);
11328 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11329 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11330 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11331 != gfc_default_integer_kind
11332 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11333 gfc_error ("ASSIGN statement at %L requires a scalar "
11334 "default INTEGER variable", &code
->expr1
->where
);
11337 case EXEC_POINTER_ASSIGN
:
11344 /* This is both a variable definition and pointer assignment
11345 context, so check both of them. For rank remapping, a final
11346 array ref may be present on the LHS and fool gfc_expr_attr
11347 used in gfc_check_vardef_context. Remove it. */
11348 e
= remove_last_array_ref (code
->expr1
);
11349 t
= gfc_check_vardef_context (e
, true, false, false,
11350 _("pointer assignment"));
11352 t
= gfc_check_vardef_context (e
, false, false, false,
11353 _("pointer assignment"));
11358 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11360 /* Assigning a class object always is a regular assign. */
11361 if (code
->expr2
->ts
.type
== BT_CLASS
11362 && code
->expr1
->ts
.type
== BT_CLASS
11363 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11364 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11365 && code
->expr2
->expr_type
== EXPR_VARIABLE
11366 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11368 code
->op
= EXEC_ASSIGN
;
11372 case EXEC_ARITHMETIC_IF
:
11374 gfc_expr
*e
= code
->expr1
;
11376 gfc_resolve_expr (e
);
11377 if (e
->expr_type
== EXPR_NULL
)
11378 gfc_error ("Invalid NULL at %L", &e
->where
);
11380 if (t
&& (e
->rank
> 0
11381 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11382 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11383 "REAL or INTEGER expression", &e
->where
);
11385 resolve_branch (code
->label1
, code
);
11386 resolve_branch (code
->label2
, code
);
11387 resolve_branch (code
->label3
, code
);
11392 if (t
&& code
->expr1
!= NULL
11393 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11394 || code
->expr1
->rank
!= 0))
11395 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11396 &code
->expr1
->where
);
11401 resolve_call (code
);
11404 case EXEC_COMPCALL
:
11406 resolve_typebound_subroutine (code
);
11409 case EXEC_CALL_PPC
:
11410 resolve_ppc_call (code
);
11414 /* Select is complicated. Also, a SELECT construct could be
11415 a transformed computed GOTO. */
11416 resolve_select (code
, false);
11419 case EXEC_SELECT_TYPE
:
11420 resolve_select_type (code
, ns
);
11424 resolve_block_construct (code
);
11428 if (code
->ext
.iterator
!= NULL
)
11430 gfc_iterator
*iter
= code
->ext
.iterator
;
11431 if (gfc_resolve_iterator (iter
, true, false))
11432 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11437 case EXEC_DO_WHILE
:
11438 if (code
->expr1
== NULL
)
11439 gfc_internal_error ("gfc_resolve_code(): No expression on "
11442 && (code
->expr1
->rank
!= 0
11443 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11444 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11445 "a scalar LOGICAL expression", &code
->expr1
->where
);
11448 case EXEC_ALLOCATE
:
11450 resolve_allocate_deallocate (code
, "ALLOCATE");
11454 case EXEC_DEALLOCATE
:
11456 resolve_allocate_deallocate (code
, "DEALLOCATE");
11461 if (!gfc_resolve_open (code
->ext
.open
))
11464 resolve_branch (code
->ext
.open
->err
, code
);
11468 if (!gfc_resolve_close (code
->ext
.close
))
11471 resolve_branch (code
->ext
.close
->err
, code
);
11474 case EXEC_BACKSPACE
:
11478 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11481 resolve_branch (code
->ext
.filepos
->err
, code
);
11485 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11488 resolve_branch (code
->ext
.inquire
->err
, code
);
11491 case EXEC_IOLENGTH
:
11492 gcc_assert (code
->ext
.inquire
!= NULL
);
11493 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11496 resolve_branch (code
->ext
.inquire
->err
, code
);
11500 if (!gfc_resolve_wait (code
->ext
.wait
))
11503 resolve_branch (code
->ext
.wait
->err
, code
);
11504 resolve_branch (code
->ext
.wait
->end
, code
);
11505 resolve_branch (code
->ext
.wait
->eor
, code
);
11510 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11513 resolve_branch (code
->ext
.dt
->err
, code
);
11514 resolve_branch (code
->ext
.dt
->end
, code
);
11515 resolve_branch (code
->ext
.dt
->eor
, code
);
11518 case EXEC_TRANSFER
:
11519 resolve_transfer (code
);
11522 case EXEC_DO_CONCURRENT
:
11524 resolve_forall_iterators (code
->ext
.forall_iterator
);
11526 if (code
->expr1
!= NULL
11527 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11528 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11529 "expression", &code
->expr1
->where
);
11532 case EXEC_OACC_PARALLEL_LOOP
:
11533 case EXEC_OACC_PARALLEL
:
11534 case EXEC_OACC_KERNELS_LOOP
:
11535 case EXEC_OACC_KERNELS
:
11536 case EXEC_OACC_DATA
:
11537 case EXEC_OACC_HOST_DATA
:
11538 case EXEC_OACC_LOOP
:
11539 case EXEC_OACC_UPDATE
:
11540 case EXEC_OACC_WAIT
:
11541 case EXEC_OACC_CACHE
:
11542 case EXEC_OACC_ENTER_DATA
:
11543 case EXEC_OACC_EXIT_DATA
:
11544 case EXEC_OACC_ATOMIC
:
11545 case EXEC_OACC_DECLARE
:
11546 gfc_resolve_oacc_directive (code
, ns
);
11549 case EXEC_OMP_ATOMIC
:
11550 case EXEC_OMP_BARRIER
:
11551 case EXEC_OMP_CANCEL
:
11552 case EXEC_OMP_CANCELLATION_POINT
:
11553 case EXEC_OMP_CRITICAL
:
11554 case EXEC_OMP_FLUSH
:
11555 case EXEC_OMP_DISTRIBUTE
:
11556 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11557 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11558 case EXEC_OMP_DISTRIBUTE_SIMD
:
11560 case EXEC_OMP_DO_SIMD
:
11561 case EXEC_OMP_MASTER
:
11562 case EXEC_OMP_ORDERED
:
11563 case EXEC_OMP_SECTIONS
:
11564 case EXEC_OMP_SIMD
:
11565 case EXEC_OMP_SINGLE
:
11566 case EXEC_OMP_TARGET
:
11567 case EXEC_OMP_TARGET_DATA
:
11568 case EXEC_OMP_TARGET_ENTER_DATA
:
11569 case EXEC_OMP_TARGET_EXIT_DATA
:
11570 case EXEC_OMP_TARGET_PARALLEL
:
11571 case EXEC_OMP_TARGET_PARALLEL_DO
:
11572 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11573 case EXEC_OMP_TARGET_SIMD
:
11574 case EXEC_OMP_TARGET_TEAMS
:
11575 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11576 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11577 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11578 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11579 case EXEC_OMP_TARGET_UPDATE
:
11580 case EXEC_OMP_TASK
:
11581 case EXEC_OMP_TASKGROUP
:
11582 case EXEC_OMP_TASKLOOP
:
11583 case EXEC_OMP_TASKLOOP_SIMD
:
11584 case EXEC_OMP_TASKWAIT
:
11585 case EXEC_OMP_TASKYIELD
:
11586 case EXEC_OMP_TEAMS
:
11587 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11588 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11589 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11590 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11591 case EXEC_OMP_WORKSHARE
:
11592 gfc_resolve_omp_directive (code
, ns
);
11595 case EXEC_OMP_PARALLEL
:
11596 case EXEC_OMP_PARALLEL_DO
:
11597 case EXEC_OMP_PARALLEL_DO_SIMD
:
11598 case EXEC_OMP_PARALLEL_SECTIONS
:
11599 case EXEC_OMP_PARALLEL_WORKSHARE
:
11600 omp_workshare_save
= omp_workshare_flag
;
11601 omp_workshare_flag
= 0;
11602 gfc_resolve_omp_directive (code
, ns
);
11603 omp_workshare_flag
= omp_workshare_save
;
11607 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11611 cs_base
= frame
.prev
;
11615 /* Resolve initial values and make sure they are compatible with
11619 resolve_values (gfc_symbol
*sym
)
11623 if (sym
->value
== NULL
)
11626 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11627 t
= resolve_structure_cons (sym
->value
, 1);
11629 t
= gfc_resolve_expr (sym
->value
);
11634 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11638 /* Verify any BIND(C) derived types in the namespace so we can report errors
11639 for them once, rather than for each variable declared of that type. */
11642 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11644 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11645 && derived_sym
->attr
.is_bind_c
== 1)
11646 verify_bind_c_derived_type (derived_sym
);
11652 /* Check the interfaces of DTIO procedures associated with derived
11653 type 'sym'. These procedures can either have typebound bindings or
11654 can appear in DTIO generic interfaces. */
11657 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11659 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11662 gfc_check_dtio_interfaces (sym
);
11667 /* Verify that any binding labels used in a given namespace do not collide
11668 with the names or binding labels of any global symbols. Multiple INTERFACE
11669 for the same procedure are permitted. */
11672 gfc_verify_binding_labels (gfc_symbol
*sym
)
11675 const char *module
;
11677 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11678 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11681 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11684 module
= sym
->module
;
11685 else if (sym
->ns
&& sym
->ns
->proc_name
11686 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11687 module
= sym
->ns
->proc_name
->name
;
11688 else if (sym
->ns
&& sym
->ns
->parent
11689 && sym
->ns
&& sym
->ns
->parent
->proc_name
11690 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11691 module
= sym
->ns
->parent
->proc_name
->name
;
11697 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11700 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11701 gsym
->where
= sym
->declared_at
;
11702 gsym
->sym_name
= sym
->name
;
11703 gsym
->binding_label
= sym
->binding_label
;
11704 gsym
->ns
= sym
->ns
;
11705 gsym
->mod_name
= module
;
11706 if (sym
->attr
.function
)
11707 gsym
->type
= GSYM_FUNCTION
;
11708 else if (sym
->attr
.subroutine
)
11709 gsym
->type
= GSYM_SUBROUTINE
;
11710 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11711 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11715 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11717 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11718 "identifier as entity at %L", sym
->name
,
11719 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11720 /* Clear the binding label to prevent checking multiple times. */
11721 sym
->binding_label
= NULL
;
11724 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11725 && (strcmp (module
, gsym
->mod_name
) != 0
11726 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11728 /* This can only happen if the variable is defined in a module - if it
11729 isn't the same module, reject it. */
11730 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11731 "uses the same global identifier as entity at %L from module %qs",
11732 sym
->name
, module
, sym
->binding_label
,
11733 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11734 sym
->binding_label
= NULL
;
11736 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11737 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11738 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11739 && sym
!= gsym
->ns
->proc_name
11740 && (module
!= gsym
->mod_name
11741 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11742 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11744 /* Print an error if the procedure is defined multiple times; we have to
11745 exclude references to the same procedure via module association or
11746 multiple checks for the same procedure. */
11747 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11748 "global identifier as entity at %L", sym
->name
,
11749 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11750 sym
->binding_label
= NULL
;
11755 /* Resolve an index expression. */
11758 resolve_index_expr (gfc_expr
*e
)
11760 if (!gfc_resolve_expr (e
))
11763 if (!gfc_simplify_expr (e
, 0))
11766 if (!gfc_specification_expr (e
))
11773 /* Resolve a charlen structure. */
11776 resolve_charlen (gfc_charlen
*cl
)
11779 bool saved_specification_expr
;
11785 saved_specification_expr
= specification_expr
;
11786 specification_expr
= true;
11788 if (cl
->length_from_typespec
)
11790 if (!gfc_resolve_expr (cl
->length
))
11792 specification_expr
= saved_specification_expr
;
11796 if (!gfc_simplify_expr (cl
->length
, 0))
11798 specification_expr
= saved_specification_expr
;
11802 /* cl->length has been resolved. It should have an integer type. */
11803 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11805 gfc_error ("Scalar INTEGER expression expected at %L",
11806 &cl
->length
->where
);
11812 if (!resolve_index_expr (cl
->length
))
11814 specification_expr
= saved_specification_expr
;
11819 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11820 a negative value, the length of character entities declared is zero. */
11821 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11822 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11823 gfc_replace_expr (cl
->length
,
11824 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11826 /* Check that the character length is not too large. */
11827 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11828 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11829 && cl
->length
->ts
.type
== BT_INTEGER
11830 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11832 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11833 specification_expr
= saved_specification_expr
;
11837 specification_expr
= saved_specification_expr
;
11842 /* Test for non-constant shape arrays. */
11845 is_non_constant_shape_array (gfc_symbol
*sym
)
11851 not_constant
= false;
11852 if (sym
->as
!= NULL
)
11854 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11855 has not been simplified; parameter array references. Do the
11856 simplification now. */
11857 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11859 e
= sym
->as
->lower
[i
];
11860 if (e
&& (!resolve_index_expr(e
)
11861 || !gfc_is_constant_expr (e
)))
11862 not_constant
= true;
11863 e
= sym
->as
->upper
[i
];
11864 if (e
&& (!resolve_index_expr(e
)
11865 || !gfc_is_constant_expr (e
)))
11866 not_constant
= true;
11869 return not_constant
;
11872 /* Given a symbol and an initialization expression, add code to initialize
11873 the symbol to the function entry. */
11875 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11879 gfc_namespace
*ns
= sym
->ns
;
11881 /* Search for the function namespace if this is a contained
11882 function without an explicit result. */
11883 if (sym
->attr
.function
&& sym
== sym
->result
11884 && sym
->name
!= sym
->ns
->proc_name
->name
)
11886 ns
= ns
->contained
;
11887 for (;ns
; ns
= ns
->sibling
)
11888 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11894 gfc_free_expr (init
);
11898 /* Build an l-value expression for the result. */
11899 lval
= gfc_lval_expr_from_sym (sym
);
11901 /* Add the code at scope entry. */
11902 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11903 init_st
->next
= ns
->code
;
11904 ns
->code
= init_st
;
11906 /* Assign the default initializer to the l-value. */
11907 init_st
->loc
= sym
->declared_at
;
11908 init_st
->expr1
= lval
;
11909 init_st
->expr2
= init
;
11913 /* Whether or not we can generate a default initializer for a symbol. */
11916 can_generate_init (gfc_symbol
*sym
)
11918 symbol_attribute
*a
;
11923 /* These symbols should never have a default initialization. */
11928 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11929 && (CLASS_DATA (sym
)->attr
.class_pointer
11930 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11931 || a
->in_equivalence
11938 || (!a
->referenced
&& !a
->result
)
11939 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11940 || (a
->function
&& sym
!= sym
->result
)
11945 /* Assign the default initializer to a derived type variable or result. */
11948 apply_default_init (gfc_symbol
*sym
)
11950 gfc_expr
*init
= NULL
;
11952 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11955 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11956 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11958 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11961 build_init_assign (sym
, init
);
11962 sym
->attr
.referenced
= 1;
11966 /* Build an initializer for a local. Returns null if the symbol should not have
11967 a default initialization. */
11970 build_default_init_expr (gfc_symbol
*sym
)
11972 /* These symbols should never have a default initialization. */
11973 if (sym
->attr
.allocatable
11974 || sym
->attr
.external
11976 || sym
->attr
.pointer
11977 || sym
->attr
.in_equivalence
11978 || sym
->attr
.in_common
11981 || sym
->attr
.cray_pointee
11982 || sym
->attr
.cray_pointer
11986 /* Get the appropriate init expression. */
11987 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11990 /* Add an initialization expression to a local variable. */
11992 apply_default_init_local (gfc_symbol
*sym
)
11994 gfc_expr
*init
= NULL
;
11996 /* The symbol should be a variable or a function return value. */
11997 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11998 || (sym
->attr
.function
&& sym
->result
!= sym
))
12001 /* Try to build the initializer expression. If we can't initialize
12002 this symbol, then init will be NULL. */
12003 init
= build_default_init_expr (sym
);
12007 /* For saved variables, we don't want to add an initializer at function
12008 entry, so we just add a static initializer. Note that automatic variables
12009 are stack allocated even with -fno-automatic; we have also to exclude
12010 result variable, which are also nonstatic. */
12011 if (!sym
->attr
.automatic
12012 && (sym
->attr
.save
|| sym
->ns
->save_all
12013 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12014 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12015 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12017 /* Don't clobber an existing initializer! */
12018 gcc_assert (sym
->value
== NULL
);
12023 build_init_assign (sym
, init
);
12027 /* Resolution of common features of flavors variable and procedure. */
12030 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12032 gfc_array_spec
*as
;
12034 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12035 as
= CLASS_DATA (sym
)->as
;
12039 /* Constraints on deferred shape variable. */
12040 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12042 bool pointer
, allocatable
, dimension
;
12044 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12046 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12047 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12048 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12052 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12053 allocatable
= sym
->attr
.allocatable
;
12054 dimension
= sym
->attr
.dimension
;
12059 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12061 gfc_error ("Allocatable array %qs at %L must have a deferred "
12062 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12065 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12066 "%qs at %L may not be ALLOCATABLE",
12067 sym
->name
, &sym
->declared_at
))
12071 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12073 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12074 "assumed rank", sym
->name
, &sym
->declared_at
);
12080 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12081 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12083 gfc_error ("Array %qs at %L cannot have a deferred shape",
12084 sym
->name
, &sym
->declared_at
);
12089 /* Constraints on polymorphic variables. */
12090 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12093 if (sym
->attr
.class_ok
12094 && !sym
->attr
.select_type_temporary
12095 && !UNLIMITED_POLY (sym
)
12096 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12098 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12099 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12100 &sym
->declared_at
);
12105 /* Assume that use associated symbols were checked in the module ns.
12106 Class-variables that are associate-names are also something special
12107 and excepted from the test. */
12108 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12110 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12111 "or pointer", sym
->name
, &sym
->declared_at
);
12120 /* Additional checks for symbols with flavor variable and derived
12121 type. To be called from resolve_fl_variable. */
12124 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12126 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12128 /* Check to see if a derived type is blocked from being host
12129 associated by the presence of another class I symbol in the same
12130 namespace. 14.6.1.3 of the standard and the discussion on
12131 comp.lang.fortran. */
12132 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12133 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12136 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12137 if (s
&& s
->attr
.generic
)
12138 s
= gfc_find_dt_in_generic (s
);
12139 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12141 gfc_error ("The type %qs cannot be host associated at %L "
12142 "because it is blocked by an incompatible object "
12143 "of the same name declared at %L",
12144 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12150 /* 4th constraint in section 11.3: "If an object of a type for which
12151 component-initialization is specified (R429) appears in the
12152 specification-part of a module and does not have the ALLOCATABLE
12153 or POINTER attribute, the object shall have the SAVE attribute."
12155 The check for initializers is performed with
12156 gfc_has_default_initializer because gfc_default_initializer generates
12157 a hidden default for allocatable components. */
12158 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12159 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12160 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12161 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12162 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12163 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12164 "%qs at %L, needed due to the default "
12165 "initialization", sym
->name
, &sym
->declared_at
))
12168 /* Assign default initializer. */
12169 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12170 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12171 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12177 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12178 except in the declaration of an entity or component that has the POINTER
12179 or ALLOCATABLE attribute. */
12182 deferred_requirements (gfc_symbol
*sym
)
12184 if (sym
->ts
.deferred
12185 && !(sym
->attr
.pointer
12186 || sym
->attr
.allocatable
12187 || sym
->attr
.associate_var
12188 || sym
->attr
.omp_udr_artificial_var
))
12190 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12191 "requires either the POINTER or ALLOCATABLE attribute",
12192 sym
->name
, &sym
->declared_at
);
12199 /* Resolve symbols with flavor variable. */
12202 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12204 int no_init_flag
, automatic_flag
;
12206 const char *auto_save_msg
;
12207 bool saved_specification_expr
;
12209 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12212 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12215 /* Set this flag to check that variables are parameters of all entries.
12216 This check is effected by the call to gfc_resolve_expr through
12217 is_non_constant_shape_array. */
12218 saved_specification_expr
= specification_expr
;
12219 specification_expr
= true;
12221 if (sym
->ns
->proc_name
12222 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12223 || sym
->ns
->proc_name
->attr
.is_main_program
)
12224 && !sym
->attr
.use_assoc
12225 && !sym
->attr
.allocatable
12226 && !sym
->attr
.pointer
12227 && is_non_constant_shape_array (sym
))
12229 /* F08:C541. The shape of an array defined in a main program or module
12230 * needs to be constant. */
12231 gfc_error ("The module or main program array %qs at %L must "
12232 "have constant shape", sym
->name
, &sym
->declared_at
);
12233 specification_expr
= saved_specification_expr
;
12237 /* Constraints on deferred type parameter. */
12238 if (!deferred_requirements (sym
))
12241 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12243 /* Make sure that character string variables with assumed length are
12244 dummy arguments. */
12245 e
= sym
->ts
.u
.cl
->length
;
12246 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12247 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12248 && !sym
->attr
.omp_udr_artificial_var
)
12250 gfc_error ("Entity with assumed character length at %L must be a "
12251 "dummy argument or a PARAMETER", &sym
->declared_at
);
12252 specification_expr
= saved_specification_expr
;
12256 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12258 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12259 specification_expr
= saved_specification_expr
;
12263 if (!gfc_is_constant_expr (e
)
12264 && !(e
->expr_type
== EXPR_VARIABLE
12265 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12267 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12268 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12269 || sym
->ns
->proc_name
->attr
.is_main_program
))
12271 gfc_error ("%qs at %L must have constant character length "
12272 "in this context", sym
->name
, &sym
->declared_at
);
12273 specification_expr
= saved_specification_expr
;
12276 if (sym
->attr
.in_common
)
12278 gfc_error ("COMMON variable %qs at %L must have constant "
12279 "character length", sym
->name
, &sym
->declared_at
);
12280 specification_expr
= saved_specification_expr
;
12286 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12287 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12289 /* Determine if the symbol may not have an initializer. */
12290 no_init_flag
= automatic_flag
= 0;
12291 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12292 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12294 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12295 && is_non_constant_shape_array (sym
))
12297 no_init_flag
= automatic_flag
= 1;
12299 /* Also, they must not have the SAVE attribute.
12300 SAVE_IMPLICIT is checked below. */
12301 if (sym
->as
&& sym
->attr
.codimension
)
12303 int corank
= sym
->as
->corank
;
12304 sym
->as
->corank
= 0;
12305 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12306 sym
->as
->corank
= corank
;
12308 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12310 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12311 specification_expr
= saved_specification_expr
;
12316 /* Ensure that any initializer is simplified. */
12318 gfc_simplify_expr (sym
->value
, 1);
12320 /* Reject illegal initializers. */
12321 if (!sym
->mark
&& sym
->value
)
12323 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12324 && CLASS_DATA (sym
)->attr
.allocatable
))
12325 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12326 sym
->name
, &sym
->declared_at
);
12327 else if (sym
->attr
.external
)
12328 gfc_error ("External %qs at %L cannot have an initializer",
12329 sym
->name
, &sym
->declared_at
);
12330 else if (sym
->attr
.dummy
12331 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12332 gfc_error ("Dummy %qs at %L cannot have an initializer",
12333 sym
->name
, &sym
->declared_at
);
12334 else if (sym
->attr
.intrinsic
)
12335 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12336 sym
->name
, &sym
->declared_at
);
12337 else if (sym
->attr
.result
)
12338 gfc_error ("Function result %qs at %L cannot have an initializer",
12339 sym
->name
, &sym
->declared_at
);
12340 else if (automatic_flag
)
12341 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12342 sym
->name
, &sym
->declared_at
);
12344 goto no_init_error
;
12345 specification_expr
= saved_specification_expr
;
12350 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12352 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12353 specification_expr
= saved_specification_expr
;
12357 specification_expr
= saved_specification_expr
;
12362 /* Compare the dummy characteristics of a module procedure interface
12363 declaration with the corresponding declaration in a submodule. */
12364 static gfc_formal_arglist
*new_formal
;
12365 static char errmsg
[200];
12368 compare_fsyms (gfc_symbol
*sym
)
12372 if (sym
== NULL
|| new_formal
== NULL
)
12375 fsym
= new_formal
->sym
;
12380 if (strcmp (sym
->name
, fsym
->name
) == 0)
12382 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12383 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12388 /* Resolve a procedure. */
12391 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12393 gfc_formal_arglist
*arg
;
12395 if (sym
->attr
.function
12396 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12399 if (sym
->ts
.type
== BT_CHARACTER
)
12401 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12403 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12404 && !resolve_charlen (cl
))
12407 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12408 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12410 gfc_error ("Character-valued statement function %qs at %L must "
12411 "have constant length", sym
->name
, &sym
->declared_at
);
12416 /* Ensure that derived type for are not of a private type. Internal
12417 module procedures are excluded by 2.2.3.3 - i.e., they are not
12418 externally accessible and can access all the objects accessible in
12420 if (!(sym
->ns
->parent
12421 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12422 && gfc_check_symbol_access (sym
))
12424 gfc_interface
*iface
;
12426 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12429 && arg
->sym
->ts
.type
== BT_DERIVED
12430 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12431 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12432 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12433 "and cannot be a dummy argument"
12434 " of %qs, which is PUBLIC at %L",
12435 arg
->sym
->name
, sym
->name
,
12436 &sym
->declared_at
))
12438 /* Stop this message from recurring. */
12439 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12444 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12445 PRIVATE to the containing module. */
12446 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12448 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12451 && arg
->sym
->ts
.type
== BT_DERIVED
12452 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12453 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12454 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12455 "PUBLIC interface %qs at %L "
12456 "takes dummy arguments of %qs which "
12457 "is PRIVATE", iface
->sym
->name
,
12458 sym
->name
, &iface
->sym
->declared_at
,
12459 gfc_typename(&arg
->sym
->ts
)))
12461 /* Stop this message from recurring. */
12462 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12469 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12470 && !sym
->attr
.proc_pointer
)
12472 gfc_error ("Function %qs at %L cannot have an initializer",
12473 sym
->name
, &sym
->declared_at
);
12477 /* An external symbol may not have an initializer because it is taken to be
12478 a procedure. Exception: Procedure Pointers. */
12479 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12481 gfc_error ("External object %qs at %L may not have an initializer",
12482 sym
->name
, &sym
->declared_at
);
12486 /* An elemental function is required to return a scalar 12.7.1 */
12487 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12489 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12490 "result", sym
->name
, &sym
->declared_at
);
12491 /* Reset so that the error only occurs once. */
12492 sym
->attr
.elemental
= 0;
12496 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12497 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12499 gfc_error ("Statement function %qs at %L may not have pointer or "
12500 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12504 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12505 char-len-param shall not be array-valued, pointer-valued, recursive
12506 or pure. ....snip... A character value of * may only be used in the
12507 following ways: (i) Dummy arg of procedure - dummy associates with
12508 actual length; (ii) To declare a named constant; or (iii) External
12509 function - but length must be declared in calling scoping unit. */
12510 if (sym
->attr
.function
12511 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12512 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12514 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12515 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12517 if (sym
->as
&& sym
->as
->rank
)
12518 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12519 "array-valued", sym
->name
, &sym
->declared_at
);
12521 if (sym
->attr
.pointer
)
12522 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12523 "pointer-valued", sym
->name
, &sym
->declared_at
);
12525 if (sym
->attr
.pure
)
12526 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12527 "pure", sym
->name
, &sym
->declared_at
);
12529 if (sym
->attr
.recursive
)
12530 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12531 "recursive", sym
->name
, &sym
->declared_at
);
12536 /* Appendix B.2 of the standard. Contained functions give an
12537 error anyway. Deferred character length is an F2003 feature.
12538 Don't warn on intrinsic conversion functions, which start
12539 with two underscores. */
12540 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12541 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12542 gfc_notify_std (GFC_STD_F95_OBS
,
12543 "CHARACTER(*) function %qs at %L",
12544 sym
->name
, &sym
->declared_at
);
12547 /* F2008, C1218. */
12548 if (sym
->attr
.elemental
)
12550 if (sym
->attr
.proc_pointer
)
12552 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12553 sym
->name
, &sym
->declared_at
);
12556 if (sym
->attr
.dummy
)
12558 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12559 sym
->name
, &sym
->declared_at
);
12564 /* F2018, C15100: "The result of an elemental function shall be scalar,
12565 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12566 pointer is tested and caught elsewhere. */
12567 if (sym
->attr
.elemental
&& sym
->result
12568 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12570 gfc_error ("Function result variable %qs at %L of elemental "
12571 "function %qs shall not have an ALLOCATABLE or POINTER "
12572 "attribute", sym
->result
->name
,
12573 &sym
->result
->declared_at
, sym
->name
);
12577 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12579 gfc_formal_arglist
*curr_arg
;
12580 int has_non_interop_arg
= 0;
12582 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12583 sym
->common_block
))
12585 /* Clear these to prevent looking at them again if there was an
12587 sym
->attr
.is_bind_c
= 0;
12588 sym
->attr
.is_c_interop
= 0;
12589 sym
->ts
.is_c_interop
= 0;
12593 /* So far, no errors have been found. */
12594 sym
->attr
.is_c_interop
= 1;
12595 sym
->ts
.is_c_interop
= 1;
12598 curr_arg
= gfc_sym_get_dummy_args (sym
);
12599 while (curr_arg
!= NULL
)
12601 /* Skip implicitly typed dummy args here. */
12602 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12603 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12604 /* If something is found to fail, record the fact so we
12605 can mark the symbol for the procedure as not being
12606 BIND(C) to try and prevent multiple errors being
12608 has_non_interop_arg
= 1;
12610 curr_arg
= curr_arg
->next
;
12613 /* See if any of the arguments were not interoperable and if so, clear
12614 the procedure symbol to prevent duplicate error messages. */
12615 if (has_non_interop_arg
!= 0)
12617 sym
->attr
.is_c_interop
= 0;
12618 sym
->ts
.is_c_interop
= 0;
12619 sym
->attr
.is_bind_c
= 0;
12623 if (!sym
->attr
.proc_pointer
)
12625 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12627 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12628 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12631 if (sym
->attr
.intent
)
12633 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12634 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12637 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12639 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12640 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12643 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12644 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12645 || sym
->attr
.contained
))
12647 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12648 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12651 if (strcmp ("ppr@", sym
->name
) == 0)
12653 gfc_error ("Procedure pointer result %qs at %L "
12654 "is missing the pointer attribute",
12655 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12660 /* Assume that a procedure whose body is not known has references
12661 to external arrays. */
12662 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12663 sym
->attr
.array_outer_dependency
= 1;
12665 /* Compare the characteristics of a module procedure with the
12666 interface declaration. Ideally this would be done with
12667 gfc_compare_interfaces but, at present, the formal interface
12668 cannot be copied to the ts.interface. */
12669 if (sym
->attr
.module_procedure
12670 && sym
->attr
.if_source
== IFSRC_DECL
)
12673 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12675 char *submodule_name
;
12676 strcpy (name
, sym
->ns
->proc_name
->name
);
12677 module_name
= strtok (name
, ".");
12678 submodule_name
= strtok (NULL
, ".");
12680 iface
= sym
->tlink
;
12683 /* Make sure that the result uses the correct charlen for deferred
12685 if (iface
&& sym
->result
12686 && iface
->ts
.type
== BT_CHARACTER
12687 && iface
->ts
.deferred
)
12688 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12693 /* Check the procedure characteristics. */
12694 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12696 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12697 "PROCEDURE at %L and its interface in %s",
12698 &sym
->declared_at
, module_name
);
12702 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12704 gfc_error ("Mismatch in PURE attribute between MODULE "
12705 "PROCEDURE at %L and its interface in %s",
12706 &sym
->declared_at
, module_name
);
12710 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12712 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12713 "PROCEDURE at %L and its interface in %s",
12714 &sym
->declared_at
, module_name
);
12718 /* Check the result characteristics. */
12719 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12721 gfc_error ("%s between the MODULE PROCEDURE declaration "
12722 "in MODULE %qs and the declaration at %L in "
12724 errmsg
, module_name
, &sym
->declared_at
,
12725 submodule_name
? submodule_name
: module_name
);
12730 /* Check the characteristics of the formal arguments. */
12731 if (sym
->formal
&& sym
->formal_ns
)
12733 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12736 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12744 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12745 been defined and we now know their defined arguments, check that they fulfill
12746 the requirements of the standard for procedures used as finalizers. */
12749 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12751 gfc_finalizer
* list
;
12752 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12753 bool result
= true;
12754 bool seen_scalar
= false;
12757 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12760 gfc_resolve_finalizers (parent
, finalizable
);
12762 /* Ensure that derived-type components have a their finalizers resolved. */
12763 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12764 for (c
= derived
->components
; c
; c
= c
->next
)
12765 if (c
->ts
.type
== BT_DERIVED
12766 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12768 bool has_final2
= false;
12769 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12770 return false; /* Error. */
12771 has_final
= has_final
|| has_final2
;
12773 /* Return early if not finalizable. */
12777 *finalizable
= false;
12781 /* Walk over the list of finalizer-procedures, check them, and if any one
12782 does not fit in with the standard's definition, print an error and remove
12783 it from the list. */
12784 prev_link
= &derived
->f2k_derived
->finalizers
;
12785 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12787 gfc_formal_arglist
*dummy_args
;
12792 /* Skip this finalizer if we already resolved it. */
12793 if (list
->proc_tree
)
12795 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12796 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12797 seen_scalar
= true;
12798 prev_link
= &(list
->next
);
12802 /* Check this exists and is a SUBROUTINE. */
12803 if (!list
->proc_sym
->attr
.subroutine
)
12805 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12806 list
->proc_sym
->name
, &list
->where
);
12810 /* We should have exactly one argument. */
12811 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12812 if (!dummy_args
|| dummy_args
->next
)
12814 gfc_error ("FINAL procedure at %L must have exactly one argument",
12818 arg
= dummy_args
->sym
;
12820 /* This argument must be of our type. */
12821 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12823 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12824 &arg
->declared_at
, derived
->name
);
12828 /* It must neither be a pointer nor allocatable nor optional. */
12829 if (arg
->attr
.pointer
)
12831 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12832 &arg
->declared_at
);
12835 if (arg
->attr
.allocatable
)
12837 gfc_error ("Argument of FINAL procedure at %L must not be"
12838 " ALLOCATABLE", &arg
->declared_at
);
12841 if (arg
->attr
.optional
)
12843 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12844 &arg
->declared_at
);
12848 /* It must not be INTENT(OUT). */
12849 if (arg
->attr
.intent
== INTENT_OUT
)
12851 gfc_error ("Argument of FINAL procedure at %L must not be"
12852 " INTENT(OUT)", &arg
->declared_at
);
12856 /* Warn if the procedure is non-scalar and not assumed shape. */
12857 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12858 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12859 gfc_warning (OPT_Wsurprising
,
12860 "Non-scalar FINAL procedure at %L should have assumed"
12861 " shape argument", &arg
->declared_at
);
12863 /* Check that it does not match in kind and rank with a FINAL procedure
12864 defined earlier. To really loop over the *earlier* declarations,
12865 we need to walk the tail of the list as new ones were pushed at the
12867 /* TODO: Handle kind parameters once they are implemented. */
12868 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12869 for (i
= list
->next
; i
; i
= i
->next
)
12871 gfc_formal_arglist
*dummy_args
;
12873 /* Argument list might be empty; that is an error signalled earlier,
12874 but we nevertheless continued resolving. */
12875 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12878 gfc_symbol
* i_arg
= dummy_args
->sym
;
12879 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12880 if (i_rank
== my_rank
)
12882 gfc_error ("FINAL procedure %qs declared at %L has the same"
12883 " rank (%d) as %qs",
12884 list
->proc_sym
->name
, &list
->where
, my_rank
,
12885 i
->proc_sym
->name
);
12891 /* Is this the/a scalar finalizer procedure? */
12893 seen_scalar
= true;
12895 /* Find the symtree for this procedure. */
12896 gcc_assert (!list
->proc_tree
);
12897 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12899 prev_link
= &list
->next
;
12902 /* Remove wrong nodes immediately from the list so we don't risk any
12903 troubles in the future when they might fail later expectations. */
12906 *prev_link
= list
->next
;
12907 gfc_free_finalizer (i
);
12911 if (result
== false)
12914 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12915 were nodes in the list, must have been for arrays. It is surely a good
12916 idea to have a scalar version there if there's something to finalize. */
12917 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12918 gfc_warning (OPT_Wsurprising
,
12919 "Only array FINAL procedures declared for derived type %qs"
12920 " defined at %L, suggest also scalar one",
12921 derived
->name
, &derived
->declared_at
);
12923 vtab
= gfc_find_derived_vtab (derived
);
12924 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12925 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12928 *finalizable
= true;
12934 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12937 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12938 const char* generic_name
, locus where
)
12940 gfc_symbol
*sym1
, *sym2
;
12941 const char *pass1
, *pass2
;
12942 gfc_formal_arglist
*dummy_args
;
12944 gcc_assert (t1
->specific
&& t2
->specific
);
12945 gcc_assert (!t1
->specific
->is_generic
);
12946 gcc_assert (!t2
->specific
->is_generic
);
12947 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12949 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12950 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12955 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12956 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12957 || sym1
->attr
.function
!= sym2
->attr
.function
)
12959 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12960 " GENERIC %qs at %L",
12961 sym1
->name
, sym2
->name
, generic_name
, &where
);
12965 /* Determine PASS arguments. */
12966 if (t1
->specific
->nopass
)
12968 else if (t1
->specific
->pass_arg
)
12969 pass1
= t1
->specific
->pass_arg
;
12972 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12974 pass1
= dummy_args
->sym
->name
;
12978 if (t2
->specific
->nopass
)
12980 else if (t2
->specific
->pass_arg
)
12981 pass2
= t2
->specific
->pass_arg
;
12984 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12986 pass2
= dummy_args
->sym
->name
;
12991 /* Compare the interfaces. */
12992 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12993 NULL
, 0, pass1
, pass2
))
12995 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12996 sym1
->name
, sym2
->name
, generic_name
, &where
);
13004 /* Worker function for resolving a generic procedure binding; this is used to
13005 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13007 The difference between those cases is finding possible inherited bindings
13008 that are overridden, as one has to look for them in tb_sym_root,
13009 tb_uop_root or tb_op, respectively. Thus the caller must already find
13010 the super-type and set p->overridden correctly. */
13013 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13014 gfc_typebound_proc
* p
, const char* name
)
13016 gfc_tbp_generic
* target
;
13017 gfc_symtree
* first_target
;
13018 gfc_symtree
* inherited
;
13020 gcc_assert (p
&& p
->is_generic
);
13022 /* Try to find the specific bindings for the symtrees in our target-list. */
13023 gcc_assert (p
->u
.generic
);
13024 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13025 if (!target
->specific
)
13027 gfc_typebound_proc
* overridden_tbp
;
13028 gfc_tbp_generic
* g
;
13029 const char* target_name
;
13031 target_name
= target
->specific_st
->name
;
13033 /* Defined for this type directly. */
13034 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13036 target
->specific
= target
->specific_st
->n
.tb
;
13037 goto specific_found
;
13040 /* Look for an inherited specific binding. */
13043 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13048 gcc_assert (inherited
->n
.tb
);
13049 target
->specific
= inherited
->n
.tb
;
13050 goto specific_found
;
13054 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13055 " at %L", target_name
, name
, &p
->where
);
13058 /* Once we've found the specific binding, check it is not ambiguous with
13059 other specifics already found or inherited for the same GENERIC. */
13061 gcc_assert (target
->specific
);
13063 /* This must really be a specific binding! */
13064 if (target
->specific
->is_generic
)
13066 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13067 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13071 /* Check those already resolved on this type directly. */
13072 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13073 if (g
!= target
&& g
->specific
13074 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13077 /* Check for ambiguity with inherited specific targets. */
13078 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13079 overridden_tbp
= overridden_tbp
->overridden
)
13080 if (overridden_tbp
->is_generic
)
13082 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13084 gcc_assert (g
->specific
);
13085 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13091 /* If we attempt to "overwrite" a specific binding, this is an error. */
13092 if (p
->overridden
&& !p
->overridden
->is_generic
)
13094 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13095 " the same name", name
, &p
->where
);
13099 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13100 all must have the same attributes here. */
13101 first_target
= p
->u
.generic
->specific
->u
.specific
;
13102 gcc_assert (first_target
);
13103 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13104 p
->function
= first_target
->n
.sym
->attr
.function
;
13110 /* Resolve a GENERIC procedure binding for a derived type. */
13113 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13115 gfc_symbol
* super_type
;
13117 /* Find the overridden binding if any. */
13118 st
->n
.tb
->overridden
= NULL
;
13119 super_type
= gfc_get_derived_super_type (derived
);
13122 gfc_symtree
* overridden
;
13123 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13126 if (overridden
&& overridden
->n
.tb
)
13127 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13130 /* Resolve using worker function. */
13131 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13135 /* Retrieve the target-procedure of an operator binding and do some checks in
13136 common for intrinsic and user-defined type-bound operators. */
13139 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13141 gfc_symbol
* target_proc
;
13143 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13144 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13145 gcc_assert (target_proc
);
13147 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13148 if (target
->specific
->nopass
)
13150 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13154 return target_proc
;
13158 /* Resolve a type-bound intrinsic operator. */
13161 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13162 gfc_typebound_proc
* p
)
13164 gfc_symbol
* super_type
;
13165 gfc_tbp_generic
* target
;
13167 /* If there's already an error here, do nothing (but don't fail again). */
13171 /* Operators should always be GENERIC bindings. */
13172 gcc_assert (p
->is_generic
);
13174 /* Look for an overridden binding. */
13175 super_type
= gfc_get_derived_super_type (derived
);
13176 if (super_type
&& super_type
->f2k_derived
)
13177 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13180 p
->overridden
= NULL
;
13182 /* Resolve general GENERIC properties using worker function. */
13183 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13186 /* Check the targets to be procedures of correct interface. */
13187 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13189 gfc_symbol
* target_proc
;
13191 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13195 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13198 /* Add target to non-typebound operator list. */
13199 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13200 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13202 gfc_interface
*head
, *intr
;
13204 /* Preempt 'gfc_check_new_interface' for submodules, where the
13205 mechanism for handling module procedures winds up resolving
13206 operator interfaces twice and would otherwise cause an error. */
13207 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13208 if (intr
->sym
== target_proc
13209 && target_proc
->attr
.used_in_submodule
)
13212 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13213 target_proc
, p
->where
))
13215 head
= derived
->ns
->op
[op
];
13216 intr
= gfc_get_interface ();
13217 intr
->sym
= target_proc
;
13218 intr
->where
= p
->where
;
13220 derived
->ns
->op
[op
] = intr
;
13232 /* Resolve a type-bound user operator (tree-walker callback). */
13234 static gfc_symbol
* resolve_bindings_derived
;
13235 static bool resolve_bindings_result
;
13237 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13240 resolve_typebound_user_op (gfc_symtree
* stree
)
13242 gfc_symbol
* super_type
;
13243 gfc_tbp_generic
* target
;
13245 gcc_assert (stree
&& stree
->n
.tb
);
13247 if (stree
->n
.tb
->error
)
13250 /* Operators should always be GENERIC bindings. */
13251 gcc_assert (stree
->n
.tb
->is_generic
);
13253 /* Find overridden procedure, if any. */
13254 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13255 if (super_type
&& super_type
->f2k_derived
)
13257 gfc_symtree
* overridden
;
13258 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13259 stree
->name
, true, NULL
);
13261 if (overridden
&& overridden
->n
.tb
)
13262 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13265 stree
->n
.tb
->overridden
= NULL
;
13267 /* Resolve basically using worker function. */
13268 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13271 /* Check the targets to be functions of correct interface. */
13272 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13274 gfc_symbol
* target_proc
;
13276 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13280 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13287 resolve_bindings_result
= false;
13288 stree
->n
.tb
->error
= 1;
13292 /* Resolve the type-bound procedures for a derived type. */
13295 resolve_typebound_procedure (gfc_symtree
* stree
)
13299 gfc_symbol
* me_arg
;
13300 gfc_symbol
* super_type
;
13301 gfc_component
* comp
;
13303 gcc_assert (stree
);
13305 /* Undefined specific symbol from GENERIC target definition. */
13309 if (stree
->n
.tb
->error
)
13312 /* If this is a GENERIC binding, use that routine. */
13313 if (stree
->n
.tb
->is_generic
)
13315 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13320 /* Get the target-procedure to check it. */
13321 gcc_assert (!stree
->n
.tb
->is_generic
);
13322 gcc_assert (stree
->n
.tb
->u
.specific
);
13323 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13324 where
= stree
->n
.tb
->where
;
13326 /* Default access should already be resolved from the parser. */
13327 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13329 if (stree
->n
.tb
->deferred
)
13331 if (!check_proc_interface (proc
, &where
))
13336 /* Check for F08:C465. */
13337 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13338 || (proc
->attr
.proc
!= PROC_MODULE
13339 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13340 || proc
->attr
.abstract
)
13342 gfc_error ("%qs must be a module procedure or an external procedure with"
13343 " an explicit interface at %L", proc
->name
, &where
);
13348 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13349 stree
->n
.tb
->function
= proc
->attr
.function
;
13351 /* Find the super-type of the current derived type. We could do this once and
13352 store in a global if speed is needed, but as long as not I believe this is
13353 more readable and clearer. */
13354 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13356 /* If PASS, resolve and check arguments if not already resolved / loaded
13357 from a .mod file. */
13358 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13360 gfc_formal_arglist
*dummy_args
;
13362 dummy_args
= gfc_sym_get_dummy_args (proc
);
13363 if (stree
->n
.tb
->pass_arg
)
13365 gfc_formal_arglist
*i
;
13367 /* If an explicit passing argument name is given, walk the arg-list
13368 and look for it. */
13371 stree
->n
.tb
->pass_arg_num
= 1;
13372 for (i
= dummy_args
; i
; i
= i
->next
)
13374 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13379 ++stree
->n
.tb
->pass_arg_num
;
13384 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13386 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13387 stree
->n
.tb
->pass_arg
);
13393 /* Otherwise, take the first one; there should in fact be at least
13395 stree
->n
.tb
->pass_arg_num
= 1;
13398 gfc_error ("Procedure %qs with PASS at %L must have at"
13399 " least one argument", proc
->name
, &where
);
13402 me_arg
= dummy_args
->sym
;
13405 /* Now check that the argument-type matches and the passed-object
13406 dummy argument is generally fine. */
13408 gcc_assert (me_arg
);
13410 if (me_arg
->ts
.type
!= BT_CLASS
)
13412 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13413 " at %L", proc
->name
, &where
);
13417 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13418 != resolve_bindings_derived
)
13420 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13421 " the derived-type %qs", me_arg
->name
, proc
->name
,
13422 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13426 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13427 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13429 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13430 " scalar", proc
->name
, &where
);
13433 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13435 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13436 " be ALLOCATABLE", proc
->name
, &where
);
13439 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13441 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13442 " be POINTER", proc
->name
, &where
);
13447 /* If we are extending some type, check that we don't override a procedure
13448 flagged NON_OVERRIDABLE. */
13449 stree
->n
.tb
->overridden
= NULL
;
13452 gfc_symtree
* overridden
;
13453 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13454 stree
->name
, true, NULL
);
13458 if (overridden
->n
.tb
)
13459 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13461 if (!gfc_check_typebound_override (stree
, overridden
))
13466 /* See if there's a name collision with a component directly in this type. */
13467 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13468 if (!strcmp (comp
->name
, stree
->name
))
13470 gfc_error ("Procedure %qs at %L has the same name as a component of"
13472 stree
->name
, &where
, resolve_bindings_derived
->name
);
13476 /* Try to find a name collision with an inherited component. */
13477 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13480 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13481 " component of %qs",
13482 stree
->name
, &where
, resolve_bindings_derived
->name
);
13486 stree
->n
.tb
->error
= 0;
13490 resolve_bindings_result
= false;
13491 stree
->n
.tb
->error
= 1;
13496 resolve_typebound_procedures (gfc_symbol
* derived
)
13499 gfc_symbol
* super_type
;
13501 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13504 super_type
= gfc_get_derived_super_type (derived
);
13506 resolve_symbol (super_type
);
13508 resolve_bindings_derived
= derived
;
13509 resolve_bindings_result
= true;
13511 if (derived
->f2k_derived
->tb_sym_root
)
13512 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13513 &resolve_typebound_procedure
);
13515 if (derived
->f2k_derived
->tb_uop_root
)
13516 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13517 &resolve_typebound_user_op
);
13519 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13521 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13522 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13523 (gfc_intrinsic_op
)op
, p
))
13524 resolve_bindings_result
= false;
13527 return resolve_bindings_result
;
13531 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13532 to give all identical derived types the same backend_decl. */
13534 add_dt_to_dt_list (gfc_symbol
*derived
)
13536 if (!derived
->dt_next
)
13538 if (gfc_derived_types
)
13540 derived
->dt_next
= gfc_derived_types
->dt_next
;
13541 gfc_derived_types
->dt_next
= derived
;
13545 derived
->dt_next
= derived
;
13547 gfc_derived_types
= derived
;
13552 /* Ensure that a derived-type is really not abstract, meaning that every
13553 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13556 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13561 if (!ensure_not_abstract_walker (sub
, st
->left
))
13563 if (!ensure_not_abstract_walker (sub
, st
->right
))
13566 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13568 gfc_symtree
* overriding
;
13569 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13572 gcc_assert (overriding
->n
.tb
);
13573 if (overriding
->n
.tb
->deferred
)
13575 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13576 " %qs is DEFERRED and not overridden",
13577 sub
->name
, &sub
->declared_at
, st
->name
);
13586 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13588 /* The algorithm used here is to recursively travel up the ancestry of sub
13589 and for each ancestor-type, check all bindings. If any of them is
13590 DEFERRED, look it up starting from sub and see if the found (overriding)
13591 binding is not DEFERRED.
13592 This is not the most efficient way to do this, but it should be ok and is
13593 clearer than something sophisticated. */
13595 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13597 if (!ancestor
->attr
.abstract
)
13600 /* Walk bindings of this ancestor. */
13601 if (ancestor
->f2k_derived
)
13604 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13609 /* Find next ancestor type and recurse on it. */
13610 ancestor
= gfc_get_derived_super_type (ancestor
);
13612 return ensure_not_abstract (sub
, ancestor
);
13618 /* This check for typebound defined assignments is done recursively
13619 since the order in which derived types are resolved is not always in
13620 order of the declarations. */
13623 check_defined_assignments (gfc_symbol
*derived
)
13627 for (c
= derived
->components
; c
; c
= c
->next
)
13629 if (!gfc_bt_struct (c
->ts
.type
)
13631 || c
->attr
.allocatable
13632 || c
->attr
.proc_pointer_comp
13633 || c
->attr
.class_pointer
13634 || c
->attr
.proc_pointer
)
13637 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13638 || (c
->ts
.u
.derived
->f2k_derived
13639 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13641 derived
->attr
.defined_assign_comp
= 1;
13645 check_defined_assignments (c
->ts
.u
.derived
);
13646 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13648 derived
->attr
.defined_assign_comp
= 1;
13655 /* Resolve a single component of a derived type or structure. */
13658 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13660 gfc_symbol
*super_type
;
13662 if (c
->attr
.artificial
)
13665 /* Do not allow vtype components to be resolved in nameless namespaces
13666 such as block data because the procedure pointers will cause ICEs
13667 and vtables are not needed in these contexts. */
13668 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13669 && sym
->ns
->proc_name
== NULL
)
13673 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13674 && c
->attr
.codimension
13675 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13677 gfc_error ("Coarray component %qs at %L must be allocatable with "
13678 "deferred shape", c
->name
, &c
->loc
);
13683 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13684 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13686 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13687 "shall not be a coarray", c
->name
, &c
->loc
);
13692 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13693 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13694 || c
->attr
.allocatable
))
13696 gfc_error ("Component %qs at %L with coarray component "
13697 "shall be a nonpointer, nonallocatable scalar",
13703 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13705 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13706 "is not an array pointer", c
->name
, &c
->loc
);
13710 /* F2003, 15.2.1 - length has to be one. */
13711 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13712 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13713 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13714 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13716 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13721 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13723 gfc_symbol
*ifc
= c
->ts
.interface
;
13725 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13731 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13733 /* Resolve interface and copy attributes. */
13734 if (ifc
->formal
&& !ifc
->formal_ns
)
13735 resolve_symbol (ifc
);
13736 if (ifc
->attr
.intrinsic
)
13737 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13741 c
->ts
= ifc
->result
->ts
;
13742 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13743 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13744 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13745 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13746 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13751 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13752 c
->attr
.pointer
= ifc
->attr
.pointer
;
13753 c
->attr
.dimension
= ifc
->attr
.dimension
;
13754 c
->as
= gfc_copy_array_spec (ifc
->as
);
13755 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13757 c
->ts
.interface
= ifc
;
13758 c
->attr
.function
= ifc
->attr
.function
;
13759 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13761 c
->attr
.pure
= ifc
->attr
.pure
;
13762 c
->attr
.elemental
= ifc
->attr
.elemental
;
13763 c
->attr
.recursive
= ifc
->attr
.recursive
;
13764 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13765 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13766 /* Copy char length. */
13767 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13769 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13770 if (cl
->length
&& !cl
->resolved
13771 && !gfc_resolve_expr (cl
->length
))
13780 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13782 /* Since PPCs are not implicitly typed, a PPC without an explicit
13783 interface must be a subroutine. */
13784 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13787 /* Procedure pointer components: Check PASS arg. */
13788 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13789 && !sym
->attr
.vtype
)
13791 gfc_symbol
* me_arg
;
13793 if (c
->tb
->pass_arg
)
13795 gfc_formal_arglist
* i
;
13797 /* If an explicit passing argument name is given, walk the arg-list
13798 and look for it. */
13801 c
->tb
->pass_arg_num
= 1;
13802 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13804 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13809 c
->tb
->pass_arg_num
++;
13814 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13815 "at %L has no argument %qs", c
->name
,
13816 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13823 /* Otherwise, take the first one; there should in fact be at least
13825 c
->tb
->pass_arg_num
= 1;
13826 if (!c
->ts
.interface
->formal
)
13828 gfc_error ("Procedure pointer component %qs with PASS at %L "
13829 "must have at least one argument",
13834 me_arg
= c
->ts
.interface
->formal
->sym
;
13837 /* Now check that the argument-type matches. */
13838 gcc_assert (me_arg
);
13839 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13840 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13841 || (me_arg
->ts
.type
== BT_CLASS
13842 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13844 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13845 " the derived type %qs", me_arg
->name
, c
->name
,
13846 me_arg
->name
, &c
->loc
, sym
->name
);
13851 /* Check for F03:C453. */
13852 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13854 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13855 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13861 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13863 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13864 "may not have the POINTER attribute", me_arg
->name
,
13865 c
->name
, me_arg
->name
, &c
->loc
);
13870 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13872 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13873 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13874 me_arg
->name
, &c
->loc
);
13879 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13881 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13882 " at %L", c
->name
, &c
->loc
);
13888 /* Check type-spec if this is not the parent-type component. */
13889 if (((sym
->attr
.is_class
13890 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13891 || c
!= sym
->components
->ts
.u
.derived
->components
))
13892 || (!sym
->attr
.is_class
13893 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13894 && !sym
->attr
.vtype
13895 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13898 super_type
= gfc_get_derived_super_type (sym
);
13900 /* If this type is an extension, set the accessibility of the parent
13903 && ((sym
->attr
.is_class
13904 && c
== sym
->components
->ts
.u
.derived
->components
)
13905 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13906 && strcmp (super_type
->name
, c
->name
) == 0)
13907 c
->attr
.access
= super_type
->attr
.access
;
13909 /* If this type is an extension, see if this component has the same name
13910 as an inherited type-bound procedure. */
13911 if (super_type
&& !sym
->attr
.is_class
13912 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13914 gfc_error ("Component %qs of %qs at %L has the same name as an"
13915 " inherited type-bound procedure",
13916 c
->name
, sym
->name
, &c
->loc
);
13920 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13921 && !c
->ts
.deferred
)
13923 if (c
->ts
.u
.cl
->length
== NULL
13924 || (!resolve_charlen(c
->ts
.u
.cl
))
13925 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13927 gfc_error ("Character length of component %qs needs to "
13928 "be a constant specification expression at %L",
13930 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13935 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13936 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13938 gfc_error ("Character component %qs of %qs at %L with deferred "
13939 "length must be a POINTER or ALLOCATABLE",
13940 c
->name
, sym
->name
, &c
->loc
);
13944 /* Add the hidden deferred length field. */
13945 if (c
->ts
.type
== BT_CHARACTER
13946 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13947 && !c
->attr
.function
13948 && !sym
->attr
.is_class
)
13950 char name
[GFC_MAX_SYMBOL_LEN
+9];
13951 gfc_component
*strlen
;
13952 sprintf (name
, "_%s_length", c
->name
);
13953 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13954 if (strlen
== NULL
)
13956 if (!gfc_add_component (sym
, name
, &strlen
))
13958 strlen
->ts
.type
= BT_INTEGER
;
13959 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13960 strlen
->attr
.access
= ACCESS_PRIVATE
;
13961 strlen
->attr
.artificial
= 1;
13965 if (c
->ts
.type
== BT_DERIVED
13966 && sym
->component_access
!= ACCESS_PRIVATE
13967 && gfc_check_symbol_access (sym
)
13968 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13969 && !c
->ts
.u
.derived
->attr
.use_assoc
13970 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13971 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13972 "PRIVATE type and cannot be a component of "
13973 "%qs, which is PUBLIC at %L", c
->name
,
13974 sym
->name
, &sym
->declared_at
))
13977 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13979 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13980 "type %s", c
->name
, &c
->loc
, sym
->name
);
13984 if (sym
->attr
.sequence
)
13986 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13988 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13989 "not have the SEQUENCE attribute",
13990 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13995 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13996 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13997 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13998 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13999 CLASS_DATA (c
)->ts
.u
.derived
14000 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14002 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
14003 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
14004 && !c
->ts
.u
.derived
->attr
.zero_comp
)
14006 gfc_error ("The pointer component %qs of %qs at %L is a type "
14007 "that has not been declared", c
->name
, sym
->name
,
14012 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14013 && CLASS_DATA (c
)->attr
.class_pointer
14014 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
14015 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
14016 && !UNLIMITED_POLY (c
))
14018 gfc_error ("The pointer component %qs of %qs at %L is a type "
14019 "that has not been declared", c
->name
, sym
->name
,
14024 /* If an allocatable component derived type is of the same type as
14025 the enclosing derived type, we need a vtable generating so that
14026 the __deallocate procedure is created. */
14027 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14028 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14029 gfc_find_vtab (&c
->ts
);
14031 /* Ensure that all the derived type components are put on the
14032 derived type list; even in formal namespaces, where derived type
14033 pointer components might not have been declared. */
14034 if (c
->ts
.type
== BT_DERIVED
14036 && c
->ts
.u
.derived
->components
14038 && sym
!= c
->ts
.u
.derived
)
14039 add_dt_to_dt_list (c
->ts
.u
.derived
);
14041 if (!gfc_resolve_array_spec (c
->as
,
14042 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14043 || c
->attr
.allocatable
)))
14046 if (c
->initializer
&& !sym
->attr
.vtype
14047 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14048 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14055 /* Be nice about the locus for a structure expression - show the locus of the
14056 first non-null sub-expression if we can. */
14059 cons_where (gfc_expr
*struct_expr
)
14061 gfc_constructor
*cons
;
14063 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14065 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14066 for (; cons
; cons
= gfc_constructor_next (cons
))
14068 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14069 return &cons
->expr
->where
;
14072 return &struct_expr
->where
;
14075 /* Resolve the components of a structure type. Much less work than derived
14079 resolve_fl_struct (gfc_symbol
*sym
)
14082 gfc_expr
*init
= NULL
;
14085 /* Make sure UNIONs do not have overlapping initializers. */
14086 if (sym
->attr
.flavor
== FL_UNION
)
14088 for (c
= sym
->components
; c
; c
= c
->next
)
14090 if (init
&& c
->initializer
)
14092 gfc_error ("Conflicting initializers in union at %L and %L",
14093 cons_where (init
), cons_where (c
->initializer
));
14094 gfc_free_expr (c
->initializer
);
14095 c
->initializer
= NULL
;
14098 init
= c
->initializer
;
14103 for (c
= sym
->components
; c
; c
= c
->next
)
14104 if (!resolve_component (c
, sym
))
14110 if (sym
->components
)
14111 add_dt_to_dt_list (sym
);
14117 /* Resolve the components of a derived type. This does not have to wait until
14118 resolution stage, but can be done as soon as the dt declaration has been
14122 resolve_fl_derived0 (gfc_symbol
*sym
)
14124 gfc_symbol
* super_type
;
14126 gfc_formal_arglist
*f
;
14129 if (sym
->attr
.unlimited_polymorphic
)
14132 super_type
= gfc_get_derived_super_type (sym
);
14135 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14137 gfc_error ("As extending type %qs at %L has a coarray component, "
14138 "parent type %qs shall also have one", sym
->name
,
14139 &sym
->declared_at
, super_type
->name
);
14143 /* Ensure the extended type gets resolved before we do. */
14144 if (super_type
&& !resolve_fl_derived0 (super_type
))
14147 /* An ABSTRACT type must be extensible. */
14148 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14150 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14151 sym
->name
, &sym
->declared_at
);
14155 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14159 for ( ; c
!= NULL
; c
= c
->next
)
14160 if (!resolve_component (c
, sym
))
14166 /* Now add the caf token field, where needed. */
14167 if (flag_coarray
!= GFC_FCOARRAY_NONE
14168 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14170 for (c
= sym
->components
; c
; c
= c
->next
)
14171 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14172 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14174 char name
[GFC_MAX_SYMBOL_LEN
+9];
14175 gfc_component
*token
;
14176 sprintf (name
, "_caf_%s", c
->name
);
14177 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14180 if (!gfc_add_component (sym
, name
, &token
))
14182 token
->ts
.type
= BT_VOID
;
14183 token
->ts
.kind
= gfc_default_integer_kind
;
14184 token
->attr
.access
= ACCESS_PRIVATE
;
14185 token
->attr
.artificial
= 1;
14186 token
->attr
.caf_token
= 1;
14191 check_defined_assignments (sym
);
14193 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14194 sym
->attr
.defined_assign_comp
14195 = super_type
->attr
.defined_assign_comp
;
14197 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14198 all DEFERRED bindings are overridden. */
14199 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14200 && !sym
->attr
.is_class
14201 && !ensure_not_abstract (sym
, super_type
))
14204 /* Check that there is a component for every PDT parameter. */
14205 if (sym
->attr
.pdt_template
)
14207 for (f
= sym
->formal
; f
; f
= f
->next
)
14211 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14214 gfc_error ("Parameterized type %qs does not have a component "
14215 "corresponding to parameter %qs at %L", sym
->name
,
14216 f
->sym
->name
, &sym
->declared_at
);
14222 /* Add derived type to the derived type list. */
14223 add_dt_to_dt_list (sym
);
14229 /* The following procedure does the full resolution of a derived type,
14230 including resolution of all type-bound procedures (if present). In contrast
14231 to 'resolve_fl_derived0' this can only be done after the module has been
14232 parsed completely. */
14235 resolve_fl_derived (gfc_symbol
*sym
)
14237 gfc_symbol
*gen_dt
= NULL
;
14239 if (sym
->attr
.unlimited_polymorphic
)
14242 if (!sym
->attr
.is_class
)
14243 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14244 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14245 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14246 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14247 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14248 "%qs at %L being the same name as derived "
14249 "type at %L", sym
->name
,
14250 gen_dt
->generic
->sym
== sym
14251 ? gen_dt
->generic
->next
->sym
->name
14252 : gen_dt
->generic
->sym
->name
,
14253 gen_dt
->generic
->sym
== sym
14254 ? &gen_dt
->generic
->next
->sym
->declared_at
14255 : &gen_dt
->generic
->sym
->declared_at
,
14256 &sym
->declared_at
))
14259 /* Resolve the finalizer procedures. */
14260 if (!gfc_resolve_finalizers (sym
, NULL
))
14263 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14265 /* Fix up incomplete CLASS symbols. */
14266 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14267 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14269 /* Nothing more to do for unlimited polymorphic entities. */
14270 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14272 else if (vptr
->ts
.u
.derived
== NULL
)
14274 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14276 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14277 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14282 if (!resolve_fl_derived0 (sym
))
14285 /* Resolve the type-bound procedures. */
14286 if (!resolve_typebound_procedures (sym
))
14289 /* Generate module vtables subject to their accessibility and their not
14290 being vtables or pdt templates. If this is not done class declarations
14291 in external procedures wind up with their own version and so SELECT TYPE
14292 fails because the vptrs do not have the same address. */
14293 if (gfc_option
.allow_std
& GFC_STD_F2003
14294 && sym
->ns
->proc_name
14295 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14296 && sym
->attr
.access
!= ACCESS_PRIVATE
14297 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14299 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14300 gfc_set_sym_referenced (vtab
);
14308 resolve_fl_namelist (gfc_symbol
*sym
)
14313 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14315 /* Check again, the check in match only works if NAMELIST comes
14317 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14319 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14320 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14324 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14325 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14326 "with assumed shape in namelist %qs at %L",
14327 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14330 if (is_non_constant_shape_array (nl
->sym
)
14331 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14332 "with nonconstant shape in namelist %qs at %L",
14333 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14336 if (nl
->sym
->ts
.type
== BT_CHARACTER
14337 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14338 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14339 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14340 "nonconstant character length in "
14341 "namelist %qs at %L", nl
->sym
->name
,
14342 sym
->name
, &sym
->declared_at
))
14347 /* Reject PRIVATE objects in a PUBLIC namelist. */
14348 if (gfc_check_symbol_access (sym
))
14350 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14352 if (!nl
->sym
->attr
.use_assoc
14353 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14354 && !gfc_check_symbol_access (nl
->sym
))
14356 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14357 "cannot be member of PUBLIC namelist %qs at %L",
14358 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14362 if (nl
->sym
->ts
.type
== BT_DERIVED
14363 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14364 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14366 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14367 "namelist %qs at %L with ALLOCATABLE "
14368 "or POINTER components", nl
->sym
->name
,
14369 sym
->name
, &sym
->declared_at
))
14374 /* Types with private components that came here by USE-association. */
14375 if (nl
->sym
->ts
.type
== BT_DERIVED
14376 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14378 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14379 "components and cannot be member of namelist %qs at %L",
14380 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14384 /* Types with private components that are defined in the same module. */
14385 if (nl
->sym
->ts
.type
== BT_DERIVED
14386 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14387 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14389 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14390 "cannot be a member of PUBLIC namelist %qs at %L",
14391 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14398 /* 14.1.2 A module or internal procedure represent local entities
14399 of the same type as a namelist member and so are not allowed. */
14400 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14402 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14405 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14406 if ((nl
->sym
== sym
->ns
->proc_name
)
14408 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14413 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14414 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14416 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14417 "attribute in %qs at %L", nlsym
->name
,
14418 &sym
->declared_at
);
14425 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14426 nl
->sym
->attr
.asynchronous
= 1;
14433 resolve_fl_parameter (gfc_symbol
*sym
)
14435 /* A parameter array's shape needs to be constant. */
14436 if (sym
->as
!= NULL
14437 && (sym
->as
->type
== AS_DEFERRED
14438 || is_non_constant_shape_array (sym
)))
14440 gfc_error ("Parameter array %qs at %L cannot be automatic "
14441 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14445 /* Constraints on deferred type parameter. */
14446 if (!deferred_requirements (sym
))
14449 /* Make sure a parameter that has been implicitly typed still
14450 matches the implicit type, since PARAMETER statements can precede
14451 IMPLICIT statements. */
14452 if (sym
->attr
.implicit_type
14453 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14456 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14457 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14461 /* Make sure the types of derived parameters are consistent. This
14462 type checking is deferred until resolution because the type may
14463 refer to a derived type from the host. */
14464 if (sym
->ts
.type
== BT_DERIVED
14465 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14467 gfc_error ("Incompatible derived type in PARAMETER at %L",
14468 &sym
->value
->where
);
14472 /* F03:C509,C514. */
14473 if (sym
->ts
.type
== BT_CLASS
)
14475 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14476 sym
->name
, &sym
->declared_at
);
14484 /* Called by resolve_symbol to check PDTs. */
14487 resolve_pdt (gfc_symbol
* sym
)
14489 gfc_symbol
*derived
= NULL
;
14490 gfc_actual_arglist
*param
;
14492 bool const_len_exprs
= true;
14493 bool assumed_len_exprs
= false;
14494 symbol_attribute
*attr
;
14496 if (sym
->ts
.type
== BT_DERIVED
)
14498 derived
= sym
->ts
.u
.derived
;
14499 attr
= &(sym
->attr
);
14501 else if (sym
->ts
.type
== BT_CLASS
)
14503 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14504 attr
= &(CLASS_DATA (sym
)->attr
);
14507 gcc_unreachable ();
14509 gcc_assert (derived
->attr
.pdt_type
);
14511 for (param
= sym
->param_list
; param
; param
= param
->next
)
14513 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14515 if (c
->attr
.pdt_kind
)
14518 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14519 && c
->attr
.pdt_len
)
14520 const_len_exprs
= false;
14521 else if (param
->spec_type
== SPEC_ASSUMED
)
14522 assumed_len_exprs
= true;
14524 if (param
->spec_type
== SPEC_DEFERRED
14525 && !attr
->allocatable
&& !attr
->pointer
)
14526 gfc_error ("The object %qs at %L has a deferred LEN "
14527 "parameter %qs and is neither allocatable "
14528 "nor a pointer", sym
->name
, &sym
->declared_at
,
14533 if (!const_len_exprs
14534 && (sym
->ns
->proc_name
->attr
.is_main_program
14535 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14536 || sym
->attr
.save
!= SAVE_NONE
))
14537 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14538 "SAVE attribute or be a variable declared in the "
14539 "main program, a module or a submodule(F08/C513)",
14540 sym
->name
, &sym
->declared_at
);
14542 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14543 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14544 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14545 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14546 sym
->name
, &sym
->declared_at
);
14550 /* Do anything necessary to resolve a symbol. Right now, we just
14551 assume that an otherwise unknown symbol is a variable. This sort
14552 of thing commonly happens for symbols in module. */
14555 resolve_symbol (gfc_symbol
*sym
)
14557 int check_constant
, mp_flag
;
14558 gfc_symtree
*symtree
;
14559 gfc_symtree
*this_symtree
;
14562 symbol_attribute class_attr
;
14563 gfc_array_spec
*as
;
14564 bool saved_specification_expr
;
14570 /* No symbol will ever have union type; only components can be unions.
14571 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14572 (just like derived type declaration symbols have flavor FL_DERIVED). */
14573 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14575 /* Coarrayed polymorphic objects with allocatable or pointer components are
14576 yet unsupported for -fcoarray=lib. */
14577 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14578 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14579 && CLASS_DATA (sym
)->attr
.codimension
14580 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14581 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14583 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14584 "type coarrays at %L are unsupported", &sym
->declared_at
);
14588 if (sym
->attr
.artificial
)
14591 if (sym
->attr
.unlimited_polymorphic
)
14594 if (sym
->attr
.flavor
== FL_UNKNOWN
14595 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14596 && !sym
->attr
.generic
&& !sym
->attr
.external
14597 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14598 && sym
->ts
.type
== BT_UNKNOWN
))
14601 /* If we find that a flavorless symbol is an interface in one of the
14602 parent namespaces, find its symtree in this namespace, free the
14603 symbol and set the symtree to point to the interface symbol. */
14604 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14606 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14607 if (symtree
&& (symtree
->n
.sym
->generic
||
14608 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14609 && sym
->ns
->construct_entities
)))
14611 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14613 if (this_symtree
->n
.sym
== sym
)
14615 symtree
->n
.sym
->refs
++;
14616 gfc_release_symbol (sym
);
14617 this_symtree
->n
.sym
= symtree
->n
.sym
;
14623 /* Otherwise give it a flavor according to such attributes as
14625 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14626 && sym
->attr
.intrinsic
== 0)
14627 sym
->attr
.flavor
= FL_VARIABLE
;
14628 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14630 sym
->attr
.flavor
= FL_PROCEDURE
;
14631 if (sym
->attr
.dimension
)
14632 sym
->attr
.function
= 1;
14636 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14637 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14639 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14640 && !resolve_procedure_interface (sym
))
14643 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14644 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14646 if (sym
->attr
.external
)
14647 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14648 "at %L", &sym
->declared_at
);
14650 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14651 "at %L", &sym
->declared_at
);
14656 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14659 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14660 && !resolve_fl_struct (sym
))
14663 /* Symbols that are module procedures with results (functions) have
14664 the types and array specification copied for type checking in
14665 procedures that call them, as well as for saving to a module
14666 file. These symbols can't stand the scrutiny that their results
14668 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14670 /* Make sure that the intrinsic is consistent with its internal
14671 representation. This needs to be done before assigning a default
14672 type to avoid spurious warnings. */
14673 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14674 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14677 /* Resolve associate names. */
14679 resolve_assoc_var (sym
, true);
14681 /* Assign default type to symbols that need one and don't have one. */
14682 if (sym
->ts
.type
== BT_UNKNOWN
)
14684 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14686 gfc_set_default_type (sym
, 1, NULL
);
14689 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14690 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14691 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14692 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14694 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14696 /* The specific case of an external procedure should emit an error
14697 in the case that there is no implicit type. */
14700 if (!sym
->attr
.mixed_entry_master
)
14701 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14705 /* Result may be in another namespace. */
14706 resolve_symbol (sym
->result
);
14708 if (!sym
->result
->attr
.proc_pointer
)
14710 sym
->ts
= sym
->result
->ts
;
14711 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14712 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14713 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14714 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14715 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14720 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14722 bool saved_specification_expr
= specification_expr
;
14723 specification_expr
= true;
14724 gfc_resolve_array_spec (sym
->result
->as
, false);
14725 specification_expr
= saved_specification_expr
;
14728 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14730 as
= CLASS_DATA (sym
)->as
;
14731 class_attr
= CLASS_DATA (sym
)->attr
;
14732 class_attr
.pointer
= class_attr
.class_pointer
;
14736 class_attr
= sym
->attr
;
14741 if (sym
->attr
.contiguous
14742 && (!class_attr
.dimension
14743 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14744 && !class_attr
.pointer
)))
14746 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14747 "array pointer or an assumed-shape or assumed-rank array",
14748 sym
->name
, &sym
->declared_at
);
14752 /* Assumed size arrays and assumed shape arrays must be dummy
14753 arguments. Array-spec's of implied-shape should have been resolved to
14754 AS_EXPLICIT already. */
14758 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14759 specification expression. */
14760 if (as
->type
== AS_IMPLIED_SHAPE
)
14763 for (i
=0; i
<as
->rank
; i
++)
14765 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14767 gfc_error ("Bad specification for assumed size array at %L",
14768 &as
->lower
[i
]->where
);
14775 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14776 || as
->type
== AS_ASSUMED_SHAPE
)
14777 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14779 if (as
->type
== AS_ASSUMED_SIZE
)
14780 gfc_error ("Assumed size array at %L must be a dummy argument",
14781 &sym
->declared_at
);
14783 gfc_error ("Assumed shape array at %L must be a dummy argument",
14784 &sym
->declared_at
);
14787 /* TS 29113, C535a. */
14788 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14789 && !sym
->attr
.select_type_temporary
)
14791 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14792 &sym
->declared_at
);
14795 if (as
->type
== AS_ASSUMED_RANK
14796 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14798 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14799 "CODIMENSION attribute", &sym
->declared_at
);
14804 /* Make sure symbols with known intent or optional are really dummy
14805 variable. Because of ENTRY statement, this has to be deferred
14806 until resolution time. */
14808 if (!sym
->attr
.dummy
14809 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14811 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14815 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14817 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14818 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14822 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14824 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14825 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14827 gfc_error ("Character dummy variable %qs at %L with VALUE "
14828 "attribute must have constant length",
14829 sym
->name
, &sym
->declared_at
);
14833 if (sym
->ts
.is_c_interop
14834 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14836 gfc_error ("C interoperable character dummy variable %qs at %L "
14837 "with VALUE attribute must have length one",
14838 sym
->name
, &sym
->declared_at
);
14843 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14844 && sym
->ts
.u
.derived
->attr
.generic
)
14846 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14847 if (!sym
->ts
.u
.derived
)
14849 gfc_error ("The derived type %qs at %L is of type %qs, "
14850 "which has not been defined", sym
->name
,
14851 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14852 sym
->ts
.type
= BT_UNKNOWN
;
14857 /* Use the same constraints as TYPE(*), except for the type check
14858 and that only scalars and assumed-size arrays are permitted. */
14859 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14861 if (!sym
->attr
.dummy
)
14863 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14864 "a dummy argument", sym
->name
, &sym
->declared_at
);
14868 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14869 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14870 && sym
->ts
.type
!= BT_COMPLEX
)
14872 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14873 "of type TYPE(*) or of an numeric intrinsic type",
14874 sym
->name
, &sym
->declared_at
);
14878 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14879 || sym
->attr
.pointer
|| sym
->attr
.value
)
14881 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14882 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14883 "attribute", sym
->name
, &sym
->declared_at
);
14887 if (sym
->attr
.intent
== INTENT_OUT
)
14889 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14890 "have the INTENT(OUT) attribute",
14891 sym
->name
, &sym
->declared_at
);
14894 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14896 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14897 "either be a scalar or an assumed-size array",
14898 sym
->name
, &sym
->declared_at
);
14902 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14903 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14905 sym
->ts
.type
= BT_ASSUMED
;
14906 sym
->as
= gfc_get_array_spec ();
14907 sym
->as
->type
= AS_ASSUMED_SIZE
;
14909 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14911 else if (sym
->ts
.type
== BT_ASSUMED
)
14913 /* TS 29113, C407a. */
14914 if (!sym
->attr
.dummy
)
14916 gfc_error ("Assumed type of variable %s at %L is only permitted "
14917 "for dummy variables", sym
->name
, &sym
->declared_at
);
14920 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14921 || sym
->attr
.pointer
|| sym
->attr
.value
)
14923 gfc_error ("Assumed-type variable %s at %L may not have the "
14924 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14925 sym
->name
, &sym
->declared_at
);
14928 if (sym
->attr
.intent
== INTENT_OUT
)
14930 gfc_error ("Assumed-type variable %s at %L may not have the "
14931 "INTENT(OUT) attribute",
14932 sym
->name
, &sym
->declared_at
);
14935 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14937 gfc_error ("Assumed-type variable %s at %L shall not be an "
14938 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14943 /* If the symbol is marked as bind(c), that it is declared at module level
14944 scope and verify its type and kind. Do not do the latter for symbols
14945 that are implicitly typed because that is handled in
14946 gfc_set_default_type. Handle dummy arguments and procedure definitions
14947 separately. Also, anything that is use associated is not handled here
14948 but instead is handled in the module it is declared in. Finally, derived
14949 type definitions are allowed to be BIND(C) since that only implies that
14950 they're interoperable, and they are checked fully for interoperability
14951 when a variable is declared of that type. */
14952 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14953 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14954 && sym
->attr
.flavor
!= FL_DERIVED
)
14958 /* First, make sure the variable is declared at the
14959 module-level scope (J3/04-007, Section 15.3). */
14960 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14961 sym
->attr
.in_common
== 0)
14963 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14964 "is neither a COMMON block nor declared at the "
14965 "module level scope", sym
->name
, &(sym
->declared_at
));
14968 else if (sym
->ts
.type
== BT_CHARACTER
14969 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14970 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14971 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14973 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14974 sym
->name
, &sym
->declared_at
);
14977 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14979 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14981 else if (sym
->attr
.implicit_type
== 0)
14983 /* If type() declaration, we need to verify that the components
14984 of the given type are all C interoperable, etc. */
14985 if (sym
->ts
.type
== BT_DERIVED
&&
14986 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14988 /* Make sure the user marked the derived type as BIND(C). If
14989 not, call the verify routine. This could print an error
14990 for the derived type more than once if multiple variables
14991 of that type are declared. */
14992 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14993 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14997 /* Verify the variable itself as C interoperable if it
14998 is BIND(C). It is not possible for this to succeed if
14999 the verify_bind_c_derived_type failed, so don't have to handle
15000 any error returned by verify_bind_c_derived_type. */
15001 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15002 sym
->common_block
);
15007 /* clear the is_bind_c flag to prevent reporting errors more than
15008 once if something failed. */
15009 sym
->attr
.is_bind_c
= 0;
15014 /* If a derived type symbol has reached this point, without its
15015 type being declared, we have an error. Notice that most
15016 conditions that produce undefined derived types have already
15017 been dealt with. However, the likes of:
15018 implicit type(t) (t) ..... call foo (t) will get us here if
15019 the type is not declared in the scope of the implicit
15020 statement. Change the type to BT_UNKNOWN, both because it is so
15021 and to prevent an ICE. */
15022 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15023 && sym
->ts
.u
.derived
->components
== NULL
15024 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15026 gfc_error ("The derived type %qs at %L is of type %qs, "
15027 "which has not been defined", sym
->name
,
15028 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15029 sym
->ts
.type
= BT_UNKNOWN
;
15033 /* Make sure that the derived type has been resolved and that the
15034 derived type is visible in the symbol's namespace, if it is a
15035 module function and is not PRIVATE. */
15036 if (sym
->ts
.type
== BT_DERIVED
15037 && sym
->ts
.u
.derived
->attr
.use_assoc
15038 && sym
->ns
->proc_name
15039 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15040 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15043 /* Unless the derived-type declaration is use associated, Fortran 95
15044 does not allow public entries of private derived types.
15045 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15046 161 in 95-006r3. */
15047 if (sym
->ts
.type
== BT_DERIVED
15048 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15049 && !sym
->ts
.u
.derived
->attr
.use_assoc
15050 && gfc_check_symbol_access (sym
)
15051 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15052 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15053 "derived type %qs",
15054 (sym
->attr
.flavor
== FL_PARAMETER
)
15055 ? "parameter" : "variable",
15056 sym
->name
, &sym
->declared_at
,
15057 sym
->ts
.u
.derived
->name
))
15060 /* F2008, C1302. */
15061 if (sym
->ts
.type
== BT_DERIVED
15062 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15063 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15064 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15065 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15067 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15068 "type LOCK_TYPE must be a coarray", sym
->name
,
15069 &sym
->declared_at
);
15073 /* TS18508, C702/C703. */
15074 if (sym
->ts
.type
== BT_DERIVED
15075 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15076 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15077 || sym
->ts
.u
.derived
->attr
.event_comp
)
15078 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15080 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15081 "type EVENT_TYPE must be a coarray", sym
->name
,
15082 &sym
->declared_at
);
15086 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15087 default initialization is defined (5.1.2.4.4). */
15088 if (sym
->ts
.type
== BT_DERIVED
15090 && sym
->attr
.intent
== INTENT_OUT
15092 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15094 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15096 if (c
->initializer
)
15098 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15099 "ASSUMED SIZE and so cannot have a default initializer",
15100 sym
->name
, &sym
->declared_at
);
15107 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15108 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15110 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15111 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15116 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15117 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15119 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15120 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15125 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15126 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15127 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15128 || class_attr
.codimension
)
15129 && (sym
->attr
.result
|| sym
->result
== sym
))
15131 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15132 "a coarray component", sym
->name
, &sym
->declared_at
);
15137 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15138 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15140 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15141 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15146 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15147 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15148 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15149 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15150 || class_attr
.allocatable
))
15152 gfc_error ("Variable %qs at %L with coarray component shall be a "
15153 "nonpointer, nonallocatable scalar, which is not a coarray",
15154 sym
->name
, &sym
->declared_at
);
15158 /* F2008, C526. The function-result case was handled above. */
15159 if (class_attr
.codimension
15160 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15161 || sym
->attr
.select_type_temporary
15162 || sym
->attr
.associate_var
15163 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15164 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15165 || sym
->ns
->proc_name
->attr
.is_main_program
15166 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15168 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15169 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15173 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15174 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15176 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15177 "deferred shape", sym
->name
, &sym
->declared_at
);
15180 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15181 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15183 gfc_error ("Allocatable coarray variable %qs at %L must have "
15184 "deferred shape", sym
->name
, &sym
->declared_at
);
15189 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15190 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15191 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15192 || (class_attr
.codimension
&& class_attr
.allocatable
))
15193 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15195 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15196 "allocatable coarray or have coarray components",
15197 sym
->name
, &sym
->declared_at
);
15201 if (class_attr
.codimension
&& sym
->attr
.dummy
15202 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15204 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15205 "procedure %qs", sym
->name
, &sym
->declared_at
,
15206 sym
->ns
->proc_name
->name
);
15210 if (sym
->ts
.type
== BT_LOGICAL
15211 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15212 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15213 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15216 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15217 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15219 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15220 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15221 "%L with non-C_Bool kind in BIND(C) procedure "
15222 "%qs", sym
->name
, &sym
->declared_at
,
15223 sym
->ns
->proc_name
->name
))
15225 else if (!gfc_logical_kinds
[i
].c_bool
15226 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15227 "%qs at %L with non-C_Bool kind in "
15228 "BIND(C) procedure %qs", sym
->name
,
15230 sym
->attr
.function
? sym
->name
15231 : sym
->ns
->proc_name
->name
))
15235 switch (sym
->attr
.flavor
)
15238 if (!resolve_fl_variable (sym
, mp_flag
))
15243 if (sym
->formal
&& !sym
->formal_ns
)
15245 /* Check that none of the arguments are a namelist. */
15246 gfc_formal_arglist
*formal
= sym
->formal
;
15248 for (; formal
; formal
= formal
->next
)
15249 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15251 gfc_error ("Namelist %qs can not be an argument to "
15252 "subroutine or function at %L",
15253 formal
->sym
->name
, &sym
->declared_at
);
15258 if (!resolve_fl_procedure (sym
, mp_flag
))
15263 if (!resolve_fl_namelist (sym
))
15268 if (!resolve_fl_parameter (sym
))
15276 /* Resolve array specifier. Check as well some constraints
15277 on COMMON blocks. */
15279 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15281 /* Set the formal_arg_flag so that check_conflict will not throw
15282 an error for host associated variables in the specification
15283 expression for an array_valued function. */
15284 if (sym
->attr
.function
&& sym
->as
)
15285 formal_arg_flag
= true;
15287 saved_specification_expr
= specification_expr
;
15288 specification_expr
= true;
15289 gfc_resolve_array_spec (sym
->as
, check_constant
);
15290 specification_expr
= saved_specification_expr
;
15292 formal_arg_flag
= false;
15294 /* Resolve formal namespaces. */
15295 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15296 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15297 gfc_resolve (sym
->formal_ns
);
15299 /* Make sure the formal namespace is present. */
15300 if (sym
->formal
&& !sym
->formal_ns
)
15302 gfc_formal_arglist
*formal
= sym
->formal
;
15303 while (formal
&& !formal
->sym
)
15304 formal
= formal
->next
;
15308 sym
->formal_ns
= formal
->sym
->ns
;
15309 if (sym
->ns
!= formal
->sym
->ns
)
15310 sym
->formal_ns
->refs
++;
15314 /* Check threadprivate restrictions. */
15315 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15316 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15317 && (!sym
->attr
.in_common
15318 && sym
->module
== NULL
15319 && (sym
->ns
->proc_name
== NULL
15320 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15321 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15323 /* Check omp declare target restrictions. */
15324 if (sym
->attr
.omp_declare_target
15325 && sym
->attr
.flavor
== FL_VARIABLE
15327 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15328 && (!sym
->attr
.in_common
15329 && sym
->module
== NULL
15330 && (sym
->ns
->proc_name
== NULL
15331 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15332 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15333 sym
->name
, &sym
->declared_at
);
15335 /* If we have come this far we can apply default-initializers, as
15336 described in 14.7.5, to those variables that have not already
15337 been assigned one. */
15338 if (sym
->ts
.type
== BT_DERIVED
15340 && !sym
->attr
.allocatable
15341 && !sym
->attr
.alloc_comp
)
15343 symbol_attribute
*a
= &sym
->attr
;
15345 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15346 && !a
->in_common
&& !a
->use_assoc
15348 && !((a
->function
|| a
->result
)
15350 || sym
->ts
.u
.derived
->attr
.alloc_comp
15351 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15352 && !(a
->function
&& sym
!= sym
->result
))
15353 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15354 apply_default_init (sym
);
15355 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15356 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15357 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15358 /* Mark the result symbol to be referenced, when it has allocatable
15360 sym
->result
->attr
.referenced
= 1;
15363 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15364 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15365 && !CLASS_DATA (sym
)->attr
.class_pointer
15366 && !CLASS_DATA (sym
)->attr
.allocatable
)
15367 apply_default_init (sym
);
15369 /* If this symbol has a type-spec, check it. */
15370 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15371 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15372 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15375 if (sym
->param_list
)
15380 /************* Resolve DATA statements *************/
15384 gfc_data_value
*vnode
;
15390 /* Advance the values structure to point to the next value in the data list. */
15393 next_data_value (void)
15395 while (mpz_cmp_ui (values
.left
, 0) == 0)
15398 if (values
.vnode
->next
== NULL
)
15401 values
.vnode
= values
.vnode
->next
;
15402 mpz_set (values
.left
, values
.vnode
->repeat
);
15410 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15416 ar_type mark
= AR_UNKNOWN
;
15418 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15424 if (!gfc_resolve_expr (var
->expr
))
15428 mpz_init_set_si (offset
, 0);
15431 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15432 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15433 e
= e
->value
.function
.actual
->expr
;
15435 if (e
->expr_type
!= EXPR_VARIABLE
)
15436 gfc_internal_error ("check_data_variable(): Bad expression");
15438 sym
= e
->symtree
->n
.sym
;
15440 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15442 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15443 sym
->name
, &sym
->declared_at
);
15446 if (e
->ref
== NULL
&& sym
->as
)
15448 gfc_error ("DATA array %qs at %L must be specified in a previous"
15449 " declaration", sym
->name
, where
);
15453 has_pointer
= sym
->attr
.pointer
;
15455 if (gfc_is_coindexed (e
))
15457 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15462 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15464 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15468 && ref
->type
== REF_ARRAY
15469 && ref
->u
.ar
.type
!= AR_FULL
)
15471 gfc_error ("DATA element %qs at %L is a pointer and so must "
15472 "be a full array", sym
->name
, where
);
15477 if (e
->rank
== 0 || has_pointer
)
15479 mpz_init_set_ui (size
, 1);
15486 /* Find the array section reference. */
15487 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15489 if (ref
->type
!= REF_ARRAY
)
15491 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15497 /* Set marks according to the reference pattern. */
15498 switch (ref
->u
.ar
.type
)
15506 /* Get the start position of array section. */
15507 gfc_get_section_index (ar
, section_index
, &offset
);
15512 gcc_unreachable ();
15515 if (!gfc_array_size (e
, &size
))
15517 gfc_error ("Nonconstant array section at %L in DATA statement",
15519 mpz_clear (offset
);
15526 while (mpz_cmp_ui (size
, 0) > 0)
15528 if (!next_data_value ())
15530 gfc_error ("DATA statement at %L has more variables than values",
15536 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15540 /* If we have more than one element left in the repeat count,
15541 and we have more than one element left in the target variable,
15542 then create a range assignment. */
15543 /* FIXME: Only done for full arrays for now, since array sections
15545 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15546 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15550 if (mpz_cmp (size
, values
.left
) >= 0)
15552 mpz_init_set (range
, values
.left
);
15553 mpz_sub (size
, size
, values
.left
);
15554 mpz_set_ui (values
.left
, 0);
15558 mpz_init_set (range
, size
);
15559 mpz_sub (values
.left
, values
.left
, size
);
15560 mpz_set_ui (size
, 0);
15563 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15566 mpz_add (offset
, offset
, range
);
15573 /* Assign initial value to symbol. */
15576 mpz_sub_ui (values
.left
, values
.left
, 1);
15577 mpz_sub_ui (size
, size
, 1);
15579 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15584 if (mark
== AR_FULL
)
15585 mpz_add_ui (offset
, offset
, 1);
15587 /* Modify the array section indexes and recalculate the offset
15588 for next element. */
15589 else if (mark
== AR_SECTION
)
15590 gfc_advance_section (section_index
, ar
, &offset
);
15594 if (mark
== AR_SECTION
)
15596 for (i
= 0; i
< ar
->dimen
; i
++)
15597 mpz_clear (section_index
[i
]);
15601 mpz_clear (offset
);
15607 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15609 /* Iterate over a list of elements in a DATA statement. */
15612 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15615 iterator_stack frame
;
15616 gfc_expr
*e
, *start
, *end
, *step
;
15617 bool retval
= true;
15619 mpz_init (frame
.value
);
15622 start
= gfc_copy_expr (var
->iter
.start
);
15623 end
= gfc_copy_expr (var
->iter
.end
);
15624 step
= gfc_copy_expr (var
->iter
.step
);
15626 if (!gfc_simplify_expr (start
, 1)
15627 || start
->expr_type
!= EXPR_CONSTANT
)
15629 gfc_error ("start of implied-do loop at %L could not be "
15630 "simplified to a constant value", &start
->where
);
15634 if (!gfc_simplify_expr (end
, 1)
15635 || end
->expr_type
!= EXPR_CONSTANT
)
15637 gfc_error ("end of implied-do loop at %L could not be "
15638 "simplified to a constant value", &start
->where
);
15642 if (!gfc_simplify_expr (step
, 1)
15643 || step
->expr_type
!= EXPR_CONSTANT
)
15645 gfc_error ("step of implied-do loop at %L could not be "
15646 "simplified to a constant value", &start
->where
);
15651 mpz_set (trip
, end
->value
.integer
);
15652 mpz_sub (trip
, trip
, start
->value
.integer
);
15653 mpz_add (trip
, trip
, step
->value
.integer
);
15655 mpz_div (trip
, trip
, step
->value
.integer
);
15657 mpz_set (frame
.value
, start
->value
.integer
);
15659 frame
.prev
= iter_stack
;
15660 frame
.variable
= var
->iter
.var
->symtree
;
15661 iter_stack
= &frame
;
15663 while (mpz_cmp_ui (trip
, 0) > 0)
15665 if (!traverse_data_var (var
->list
, where
))
15671 e
= gfc_copy_expr (var
->expr
);
15672 if (!gfc_simplify_expr (e
, 1))
15679 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15681 mpz_sub_ui (trip
, trip
, 1);
15685 mpz_clear (frame
.value
);
15688 gfc_free_expr (start
);
15689 gfc_free_expr (end
);
15690 gfc_free_expr (step
);
15692 iter_stack
= frame
.prev
;
15697 /* Type resolve variables in the variable list of a DATA statement. */
15700 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15704 for (; var
; var
= var
->next
)
15706 if (var
->expr
== NULL
)
15707 t
= traverse_data_list (var
, where
);
15709 t
= check_data_variable (var
, where
);
15719 /* Resolve the expressions and iterators associated with a data statement.
15720 This is separate from the assignment checking because data lists should
15721 only be resolved once. */
15724 resolve_data_variables (gfc_data_variable
*d
)
15726 for (; d
; d
= d
->next
)
15728 if (d
->list
== NULL
)
15730 if (!gfc_resolve_expr (d
->expr
))
15735 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15738 if (!resolve_data_variables (d
->list
))
15747 /* Resolve a single DATA statement. We implement this by storing a pointer to
15748 the value list into static variables, and then recursively traversing the
15749 variables list, expanding iterators and such. */
15752 resolve_data (gfc_data
*d
)
15755 if (!resolve_data_variables (d
->var
))
15758 values
.vnode
= d
->value
;
15759 if (d
->value
== NULL
)
15760 mpz_set_ui (values
.left
, 0);
15762 mpz_set (values
.left
, d
->value
->repeat
);
15764 if (!traverse_data_var (d
->var
, &d
->where
))
15767 /* At this point, we better not have any values left. */
15769 if (next_data_value ())
15770 gfc_error ("DATA statement at %L has more values than variables",
15775 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15776 accessed by host or use association, is a dummy argument to a pure function,
15777 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15778 is storage associated with any such variable, shall not be used in the
15779 following contexts: (clients of this function). */
15781 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15782 procedure. Returns zero if assignment is OK, nonzero if there is a
15785 gfc_impure_variable (gfc_symbol
*sym
)
15790 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15793 /* Check if the symbol's ns is inside the pure procedure. */
15794 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15798 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15802 proc
= sym
->ns
->proc_name
;
15803 if (sym
->attr
.dummy
15804 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15805 || proc
->attr
.function
))
15808 /* TODO: Sort out what can be storage associated, if anything, and include
15809 it here. In principle equivalences should be scanned but it does not
15810 seem to be possible to storage associate an impure variable this way. */
15815 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15816 current namespace is inside a pure procedure. */
15819 gfc_pure (gfc_symbol
*sym
)
15821 symbol_attribute attr
;
15826 /* Check if the current namespace or one of its parents
15827 belongs to a pure procedure. */
15828 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15830 sym
= ns
->proc_name
;
15834 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15842 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15846 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15847 checks if the current namespace is implicitly pure. Note that this
15848 function returns false for a PURE procedure. */
15851 gfc_implicit_pure (gfc_symbol
*sym
)
15857 /* Check if the current procedure is implicit_pure. Walk up
15858 the procedure list until we find a procedure. */
15859 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15861 sym
= ns
->proc_name
;
15865 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15870 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15871 && !sym
->attr
.pure
;
15876 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15882 /* Check if the current procedure is implicit_pure. Walk up
15883 the procedure list until we find a procedure. */
15884 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15886 sym
= ns
->proc_name
;
15890 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15895 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15896 sym
->attr
.implicit_pure
= 0;
15898 sym
->attr
.pure
= 0;
15902 /* Test whether the current procedure is elemental or not. */
15905 gfc_elemental (gfc_symbol
*sym
)
15907 symbol_attribute attr
;
15910 sym
= gfc_current_ns
->proc_name
;
15915 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15919 /* Warn about unused labels. */
15922 warn_unused_fortran_label (gfc_st_label
*label
)
15927 warn_unused_fortran_label (label
->left
);
15929 if (label
->defined
== ST_LABEL_UNKNOWN
)
15932 switch (label
->referenced
)
15934 case ST_LABEL_UNKNOWN
:
15935 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15936 label
->value
, &label
->where
);
15939 case ST_LABEL_BAD_TARGET
:
15940 gfc_warning (OPT_Wunused_label
,
15941 "Label %d at %L defined but cannot be used",
15942 label
->value
, &label
->where
);
15949 warn_unused_fortran_label (label
->right
);
15953 /* Returns the sequence type of a symbol or sequence. */
15956 sequence_type (gfc_typespec ts
)
15965 if (ts
.u
.derived
->components
== NULL
)
15966 return SEQ_NONDEFAULT
;
15968 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15969 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15970 if (sequence_type (c
->ts
) != result
)
15976 if (ts
.kind
!= gfc_default_character_kind
)
15977 return SEQ_NONDEFAULT
;
15979 return SEQ_CHARACTER
;
15982 if (ts
.kind
!= gfc_default_integer_kind
)
15983 return SEQ_NONDEFAULT
;
15985 return SEQ_NUMERIC
;
15988 if (!(ts
.kind
== gfc_default_real_kind
15989 || ts
.kind
== gfc_default_double_kind
))
15990 return SEQ_NONDEFAULT
;
15992 return SEQ_NUMERIC
;
15995 if (ts
.kind
!= gfc_default_complex_kind
)
15996 return SEQ_NONDEFAULT
;
15998 return SEQ_NUMERIC
;
16001 if (ts
.kind
!= gfc_default_logical_kind
)
16002 return SEQ_NONDEFAULT
;
16004 return SEQ_NUMERIC
;
16007 return SEQ_NONDEFAULT
;
16012 /* Resolve derived type EQUIVALENCE object. */
16015 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16017 gfc_component
*c
= derived
->components
;
16022 /* Shall not be an object of nonsequence derived type. */
16023 if (!derived
->attr
.sequence
)
16025 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16026 "attribute to be an EQUIVALENCE object", sym
->name
,
16031 /* Shall not have allocatable components. */
16032 if (derived
->attr
.alloc_comp
)
16034 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16035 "components to be an EQUIVALENCE object",sym
->name
,
16040 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16042 gfc_error ("Derived type variable %qs at %L with default "
16043 "initialization cannot be in EQUIVALENCE with a variable "
16044 "in COMMON", sym
->name
, &e
->where
);
16048 for (; c
; c
= c
->next
)
16050 if (gfc_bt_struct (c
->ts
.type
)
16051 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16054 /* Shall not be an object of sequence derived type containing a pointer
16055 in the structure. */
16056 if (c
->attr
.pointer
)
16058 gfc_error ("Derived type variable %qs at %L with pointer "
16059 "component(s) cannot be an EQUIVALENCE object",
16060 sym
->name
, &e
->where
);
16068 /* Resolve equivalence object.
16069 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16070 an allocatable array, an object of nonsequence derived type, an object of
16071 sequence derived type containing a pointer at any level of component
16072 selection, an automatic object, a function name, an entry name, a result
16073 name, a named constant, a structure component, or a subobject of any of
16074 the preceding objects. A substring shall not have length zero. A
16075 derived type shall not have components with default initialization nor
16076 shall two objects of an equivalence group be initialized.
16077 Either all or none of the objects shall have an protected attribute.
16078 The simple constraints are done in symbol.c(check_conflict) and the rest
16079 are implemented here. */
16082 resolve_equivalence (gfc_equiv
*eq
)
16085 gfc_symbol
*first_sym
;
16088 locus
*last_where
= NULL
;
16089 seq_type eq_type
, last_eq_type
;
16090 gfc_typespec
*last_ts
;
16091 int object
, cnt_protected
;
16094 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16096 first_sym
= eq
->expr
->symtree
->n
.sym
;
16100 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16104 e
->ts
= e
->symtree
->n
.sym
->ts
;
16105 /* match_varspec might not know yet if it is seeing
16106 array reference or substring reference, as it doesn't
16108 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16110 gfc_ref
*ref
= e
->ref
;
16111 sym
= e
->symtree
->n
.sym
;
16113 if (sym
->attr
.dimension
)
16115 ref
->u
.ar
.as
= sym
->as
;
16119 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16120 if (e
->ts
.type
== BT_CHARACTER
16122 && ref
->type
== REF_ARRAY
16123 && ref
->u
.ar
.dimen
== 1
16124 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16125 && ref
->u
.ar
.stride
[0] == NULL
)
16127 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16128 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16131 /* Optimize away the (:) reference. */
16132 if (start
== NULL
&& end
== NULL
)
16135 e
->ref
= ref
->next
;
16137 e
->ref
->next
= ref
->next
;
16142 ref
->type
= REF_SUBSTRING
;
16144 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16146 ref
->u
.ss
.start
= start
;
16147 if (end
== NULL
&& e
->ts
.u
.cl
)
16148 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16149 ref
->u
.ss
.end
= end
;
16150 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16157 /* Any further ref is an error. */
16160 gcc_assert (ref
->type
== REF_ARRAY
);
16161 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16167 if (!gfc_resolve_expr (e
))
16170 sym
= e
->symtree
->n
.sym
;
16172 if (sym
->attr
.is_protected
)
16174 if (cnt_protected
> 0 && cnt_protected
!= object
)
16176 gfc_error ("Either all or none of the objects in the "
16177 "EQUIVALENCE set at %L shall have the "
16178 "PROTECTED attribute",
16183 /* Shall not equivalence common block variables in a PURE procedure. */
16184 if (sym
->ns
->proc_name
16185 && sym
->ns
->proc_name
->attr
.pure
16186 && sym
->attr
.in_common
)
16188 /* Need to check for symbols that may have entered the pure
16189 procedure via a USE statement. */
16190 bool saw_sym
= false;
16191 if (sym
->ns
->use_stmts
)
16194 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16195 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16201 gfc_error ("COMMON block member %qs at %L cannot be an "
16202 "EQUIVALENCE object in the pure procedure %qs",
16203 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16207 /* Shall not be a named constant. */
16208 if (e
->expr_type
== EXPR_CONSTANT
)
16210 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16211 "object", sym
->name
, &e
->where
);
16215 if (e
->ts
.type
== BT_DERIVED
16216 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16219 /* Check that the types correspond correctly:
16221 A numeric sequence structure may be equivalenced to another sequence
16222 structure, an object of default integer type, default real type, double
16223 precision real type, default logical type such that components of the
16224 structure ultimately only become associated to objects of the same
16225 kind. A character sequence structure may be equivalenced to an object
16226 of default character kind or another character sequence structure.
16227 Other objects may be equivalenced only to objects of the same type and
16228 kind parameters. */
16230 /* Identical types are unconditionally OK. */
16231 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16232 goto identical_types
;
16234 last_eq_type
= sequence_type (*last_ts
);
16235 eq_type
= sequence_type (sym
->ts
);
16237 /* Since the pair of objects is not of the same type, mixed or
16238 non-default sequences can be rejected. */
16240 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16241 "statement at %L with different type objects";
16243 && last_eq_type
== SEQ_MIXED
16244 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16245 || (eq_type
== SEQ_MIXED
16246 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16249 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16250 "statement at %L with objects of different type";
16252 && last_eq_type
== SEQ_NONDEFAULT
16253 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16254 || (eq_type
== SEQ_NONDEFAULT
16255 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16258 msg
="Non-CHARACTER object %qs in default CHARACTER "
16259 "EQUIVALENCE statement at %L";
16260 if (last_eq_type
== SEQ_CHARACTER
16261 && eq_type
!= SEQ_CHARACTER
16262 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16265 msg
="Non-NUMERIC object %qs in default NUMERIC "
16266 "EQUIVALENCE statement at %L";
16267 if (last_eq_type
== SEQ_NUMERIC
16268 && eq_type
!= SEQ_NUMERIC
16269 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16274 last_where
= &e
->where
;
16279 /* Shall not be an automatic array. */
16280 if (e
->ref
->type
== REF_ARRAY
16281 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16283 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16284 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16291 /* Shall not be a structure component. */
16292 if (r
->type
== REF_COMPONENT
)
16294 gfc_error ("Structure component %qs at %L cannot be an "
16295 "EQUIVALENCE object",
16296 r
->u
.c
.component
->name
, &e
->where
);
16300 /* A substring shall not have length zero. */
16301 if (r
->type
== REF_SUBSTRING
)
16303 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16305 gfc_error ("Substring at %L has length zero",
16306 &r
->u
.ss
.start
->where
);
16316 /* Function called by resolve_fntype to flag other symbol used in the
16317 length type parameter specification of function resuls. */
16320 flag_fn_result_spec (gfc_expr
*expr
,
16322 int *f ATTRIBUTE_UNUSED
)
16327 if (expr
->expr_type
== EXPR_VARIABLE
)
16329 s
= expr
->symtree
->n
.sym
;
16330 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16336 gfc_error ("Self reference in character length expression "
16337 "for %qs at %L", sym
->name
, &expr
->where
);
16341 if (!s
->fn_result_spec
16342 && s
->attr
.flavor
== FL_PARAMETER
)
16344 /* Function contained in a module.... */
16345 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16348 s
->fn_result_spec
= 1;
16349 /* Make sure that this symbol is translated as a module
16351 st
= gfc_get_unique_symtree (ns
);
16355 /* ... which is use associated and called. */
16356 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16358 /* External function matched with an interface. */
16361 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16362 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16363 && s
->ns
->proc_name
->attr
.function
))
16364 s
->fn_result_spec
= 1;
16371 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16374 resolve_fntype (gfc_namespace
*ns
)
16376 gfc_entry_list
*el
;
16379 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16382 /* If there are any entries, ns->proc_name is the entry master
16383 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16385 sym
= ns
->entries
->sym
;
16387 sym
= ns
->proc_name
;
16388 if (sym
->result
== sym
16389 && sym
->ts
.type
== BT_UNKNOWN
16390 && !gfc_set_default_type (sym
, 0, NULL
)
16391 && !sym
->attr
.untyped
)
16393 gfc_error ("Function %qs at %L has no IMPLICIT type",
16394 sym
->name
, &sym
->declared_at
);
16395 sym
->attr
.untyped
= 1;
16398 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16399 && !sym
->attr
.contained
16400 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16401 && gfc_check_symbol_access (sym
))
16403 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16404 "%L of PRIVATE type %qs", sym
->name
,
16405 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16409 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16411 if (el
->sym
->result
== el
->sym
16412 && el
->sym
->ts
.type
== BT_UNKNOWN
16413 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16414 && !el
->sym
->attr
.untyped
)
16416 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16417 el
->sym
->name
, &el
->sym
->declared_at
);
16418 el
->sym
->attr
.untyped
= 1;
16422 if (sym
->ts
.type
== BT_CHARACTER
)
16423 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16427 /* 12.3.2.1.1 Defined operators. */
16430 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16432 gfc_formal_arglist
*formal
;
16434 if (!sym
->attr
.function
)
16436 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16437 sym
->name
, &where
);
16441 if (sym
->ts
.type
== BT_CHARACTER
16442 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16443 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16444 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16446 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16447 "character length", sym
->name
, &where
);
16451 formal
= gfc_sym_get_dummy_args (sym
);
16452 if (!formal
|| !formal
->sym
)
16454 gfc_error ("User operator procedure %qs at %L must have at least "
16455 "one argument", sym
->name
, &where
);
16459 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16461 gfc_error ("First argument of operator interface at %L must be "
16462 "INTENT(IN)", &where
);
16466 if (formal
->sym
->attr
.optional
)
16468 gfc_error ("First argument of operator interface at %L cannot be "
16469 "optional", &where
);
16473 formal
= formal
->next
;
16474 if (!formal
|| !formal
->sym
)
16477 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16479 gfc_error ("Second argument of operator interface at %L must be "
16480 "INTENT(IN)", &where
);
16484 if (formal
->sym
->attr
.optional
)
16486 gfc_error ("Second argument of operator interface at %L cannot be "
16487 "optional", &where
);
16493 gfc_error ("Operator interface at %L must have, at most, two "
16494 "arguments", &where
);
16502 gfc_resolve_uops (gfc_symtree
*symtree
)
16504 gfc_interface
*itr
;
16506 if (symtree
== NULL
)
16509 gfc_resolve_uops (symtree
->left
);
16510 gfc_resolve_uops (symtree
->right
);
16512 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16513 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16517 /* Examine all of the expressions associated with a program unit,
16518 assign types to all intermediate expressions, make sure that all
16519 assignments are to compatible types and figure out which names
16520 refer to which functions or subroutines. It doesn't check code
16521 block, which is handled by gfc_resolve_code. */
16524 resolve_types (gfc_namespace
*ns
)
16530 gfc_namespace
* old_ns
= gfc_current_ns
;
16532 if (ns
->types_resolved
)
16535 /* Check that all IMPLICIT types are ok. */
16536 if (!ns
->seen_implicit_none
)
16539 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16540 if (ns
->set_flag
[letter
]
16541 && !resolve_typespec_used (&ns
->default_type
[letter
],
16542 &ns
->implicit_loc
[letter
], NULL
))
16546 gfc_current_ns
= ns
;
16548 resolve_entries (ns
);
16550 resolve_common_vars (&ns
->blank_common
, false);
16551 resolve_common_blocks (ns
->common_root
);
16553 resolve_contained_functions (ns
);
16555 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16556 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16557 resolve_formal_arglist (ns
->proc_name
);
16559 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16561 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16562 resolve_charlen (cl
);
16564 gfc_traverse_ns (ns
, resolve_symbol
);
16566 resolve_fntype (ns
);
16568 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16570 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16571 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16572 "also be PURE", n
->proc_name
->name
,
16573 &n
->proc_name
->declared_at
);
16579 gfc_do_concurrent_flag
= 0;
16580 gfc_check_interfaces (ns
);
16582 gfc_traverse_ns (ns
, resolve_values
);
16588 for (d
= ns
->data
; d
; d
= d
->next
)
16592 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16594 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16596 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16597 resolve_equivalence (eq
);
16599 /* Warn about unused labels. */
16600 if (warn_unused_label
)
16601 warn_unused_fortran_label (ns
->st_labels
);
16603 gfc_resolve_uops (ns
->uop_root
);
16605 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16607 gfc_resolve_omp_declare_simd (ns
);
16609 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16611 ns
->types_resolved
= 1;
16613 gfc_current_ns
= old_ns
;
16617 /* Call gfc_resolve_code recursively. */
16620 resolve_codes (gfc_namespace
*ns
)
16623 bitmap_obstack old_obstack
;
16625 if (ns
->resolved
== 1)
16628 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16631 gfc_current_ns
= ns
;
16633 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16634 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16637 /* Set to an out of range value. */
16638 current_entry_id
= -1;
16640 old_obstack
= labels_obstack
;
16641 bitmap_obstack_initialize (&labels_obstack
);
16643 gfc_resolve_oacc_declare (ns
);
16644 gfc_resolve_omp_local_vars (ns
);
16645 gfc_resolve_code (ns
->code
, ns
);
16647 bitmap_obstack_release (&labels_obstack
);
16648 labels_obstack
= old_obstack
;
16652 /* This function is called after a complete program unit has been compiled.
16653 Its purpose is to examine all of the expressions associated with a program
16654 unit, assign types to all intermediate expressions, make sure that all
16655 assignments are to compatible types and figure out which names refer to
16656 which functions or subroutines. */
16659 gfc_resolve (gfc_namespace
*ns
)
16661 gfc_namespace
*old_ns
;
16662 code_stack
*old_cs_base
;
16663 struct gfc_omp_saved_state old_omp_state
;
16669 old_ns
= gfc_current_ns
;
16670 old_cs_base
= cs_base
;
16672 /* As gfc_resolve can be called during resolution of an OpenMP construct
16673 body, we should clear any state associated to it, so that say NS's
16674 DO loops are not interpreted as OpenMP loops. */
16675 if (!ns
->construct_entities
)
16676 gfc_omp_save_and_clear_state (&old_omp_state
);
16678 resolve_types (ns
);
16679 component_assignment_level
= 0;
16680 resolve_codes (ns
);
16682 gfc_current_ns
= old_ns
;
16683 cs_base
= old_cs_base
;
16686 gfc_run_passes (ns
);
16688 if (!ns
->construct_entities
)
16689 gfc_omp_restore_state (&old_omp_state
);