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 (flag_frontend_optimize
&&
3986 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3988 /* Warn about short-circuiting
3989 with impure function as second operand. */
3991 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3996 /* Logical ops on integers become bitwise ops with -fdec. */
3998 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4000 e
->ts
.type
= BT_INTEGER
;
4001 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4002 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4003 gfc_convert_type (op1
, &e
->ts
, 1);
4004 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4005 gfc_convert_type (op2
, &e
->ts
, 1);
4006 e
= logical_to_bitwise (e
);
4007 return resolve_function (e
);
4010 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4011 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4012 gfc_typename (&op2
->ts
));
4017 /* Logical ops on integers become bitwise ops with -fdec. */
4018 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4020 e
->ts
.type
= BT_INTEGER
;
4021 e
->ts
.kind
= op1
->ts
.kind
;
4022 e
= logical_to_bitwise (e
);
4023 return resolve_function (e
);
4026 if (op1
->ts
.type
== BT_LOGICAL
)
4028 e
->ts
.type
= BT_LOGICAL
;
4029 e
->ts
.kind
= op1
->ts
.kind
;
4033 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4034 gfc_typename (&op1
->ts
));
4038 case INTRINSIC_GT_OS
:
4040 case INTRINSIC_GE_OS
:
4042 case INTRINSIC_LT_OS
:
4044 case INTRINSIC_LE_OS
:
4045 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4047 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4054 case INTRINSIC_EQ_OS
:
4056 case INTRINSIC_NE_OS
:
4057 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4058 && op1
->ts
.kind
== op2
->ts
.kind
)
4060 e
->ts
.type
= BT_LOGICAL
;
4061 e
->ts
.kind
= gfc_default_logical_kind
;
4065 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4067 gfc_type_convert_binary (e
, 1);
4069 e
->ts
.type
= BT_LOGICAL
;
4070 e
->ts
.kind
= gfc_default_logical_kind
;
4072 if (warn_compare_reals
)
4074 gfc_intrinsic_op op
= e
->value
.op
.op
;
4076 /* Type conversion has made sure that the types of op1 and op2
4077 agree, so it is only necessary to check the first one. */
4078 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4079 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4080 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4084 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4085 msg
= "Equality comparison for %s at %L";
4087 msg
= "Inequality comparison for %s at %L";
4089 gfc_warning (OPT_Wcompare_reals
, msg
,
4090 gfc_typename (&op1
->ts
), &op1
->where
);
4097 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4099 _("Logicals at %%L must be compared with %s instead of %s"),
4100 (e
->value
.op
.op
== INTRINSIC_EQ
4101 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4102 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4105 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4106 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4107 gfc_typename (&op2
->ts
));
4111 case INTRINSIC_USER
:
4112 if (e
->value
.op
.uop
->op
== NULL
)
4114 const char *name
= e
->value
.op
.uop
->name
;
4115 const char *guessed
;
4116 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4118 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4121 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4123 else if (op2
== NULL
)
4124 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4125 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4128 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4129 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4130 gfc_typename (&op2
->ts
));
4131 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4136 case INTRINSIC_PARENTHESES
:
4138 if (e
->ts
.type
== BT_CHARACTER
)
4139 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4143 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4146 /* Deal with arrayness of an operand through an operator. */
4150 switch (e
->value
.op
.op
)
4152 case INTRINSIC_PLUS
:
4153 case INTRINSIC_MINUS
:
4154 case INTRINSIC_TIMES
:
4155 case INTRINSIC_DIVIDE
:
4156 case INTRINSIC_POWER
:
4157 case INTRINSIC_CONCAT
:
4161 case INTRINSIC_NEQV
:
4163 case INTRINSIC_EQ_OS
:
4165 case INTRINSIC_NE_OS
:
4167 case INTRINSIC_GT_OS
:
4169 case INTRINSIC_GE_OS
:
4171 case INTRINSIC_LT_OS
:
4173 case INTRINSIC_LE_OS
:
4175 if (op1
->rank
== 0 && op2
->rank
== 0)
4178 if (op1
->rank
== 0 && op2
->rank
!= 0)
4180 e
->rank
= op2
->rank
;
4182 if (e
->shape
== NULL
)
4183 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4186 if (op1
->rank
!= 0 && op2
->rank
== 0)
4188 e
->rank
= op1
->rank
;
4190 if (e
->shape
== NULL
)
4191 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4194 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4196 if (op1
->rank
== op2
->rank
)
4198 e
->rank
= op1
->rank
;
4199 if (e
->shape
== NULL
)
4201 t
= compare_shapes (op1
, op2
);
4205 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4210 /* Allow higher level expressions to work. */
4213 /* Try user-defined operators, and otherwise throw an error. */
4214 dual_locus_error
= true;
4216 _("Inconsistent ranks for operator at %%L and %%L"));
4223 case INTRINSIC_PARENTHESES
:
4225 case INTRINSIC_UPLUS
:
4226 case INTRINSIC_UMINUS
:
4227 /* Simply copy arrayness attribute */
4228 e
->rank
= op1
->rank
;
4230 if (e
->shape
== NULL
)
4231 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4239 /* Attempt to simplify the expression. */
4242 t
= gfc_simplify_expr (e
, 0);
4243 /* Some calls do not succeed in simplification and return false
4244 even though there is no error; e.g. variable references to
4245 PARAMETER arrays. */
4246 if (!gfc_is_constant_expr (e
))
4254 match m
= gfc_extend_expr (e
);
4257 if (m
== MATCH_ERROR
)
4261 if (dual_locus_error
)
4262 gfc_error (msg
, &op1
->where
, &op2
->where
);
4264 gfc_error (msg
, &e
->where
);
4270 /************** Array resolution subroutines **************/
4273 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4275 /* Compare two integer expressions. */
4277 static compare_result
4278 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4282 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4283 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4286 /* If either of the types isn't INTEGER, we must have
4287 raised an error earlier. */
4289 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4292 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4302 /* Compare an integer expression with an integer. */
4304 static compare_result
4305 compare_bound_int (gfc_expr
*a
, int b
)
4309 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4312 if (a
->ts
.type
!= BT_INTEGER
)
4313 gfc_internal_error ("compare_bound_int(): Bad expression");
4315 i
= mpz_cmp_si (a
->value
.integer
, b
);
4325 /* Compare an integer expression with a mpz_t. */
4327 static compare_result
4328 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4332 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4335 if (a
->ts
.type
!= BT_INTEGER
)
4336 gfc_internal_error ("compare_bound_int(): Bad expression");
4338 i
= mpz_cmp (a
->value
.integer
, b
);
4348 /* Compute the last value of a sequence given by a triplet.
4349 Return 0 if it wasn't able to compute the last value, or if the
4350 sequence if empty, and 1 otherwise. */
4353 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4354 gfc_expr
*stride
, mpz_t last
)
4358 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4359 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4360 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4363 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4364 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4367 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4369 if (compare_bound (start
, end
) == CMP_GT
)
4371 mpz_set (last
, end
->value
.integer
);
4375 if (compare_bound_int (stride
, 0) == CMP_GT
)
4377 /* Stride is positive */
4378 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4383 /* Stride is negative */
4384 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4389 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4390 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4391 mpz_sub (last
, end
->value
.integer
, rem
);
4398 /* Compare a single dimension of an array reference to the array
4402 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4406 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4408 gcc_assert (ar
->stride
[i
] == NULL
);
4409 /* This implies [*] as [*:] and [*:3] are not possible. */
4410 if (ar
->start
[i
] == NULL
)
4412 gcc_assert (ar
->end
[i
] == NULL
);
4417 /* Given start, end and stride values, calculate the minimum and
4418 maximum referenced indexes. */
4420 switch (ar
->dimen_type
[i
])
4423 case DIMEN_THIS_IMAGE
:
4428 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4431 gfc_warning (0, "Array reference at %L is out of bounds "
4432 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4433 mpz_get_si (ar
->start
[i
]->value
.integer
),
4434 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4436 gfc_warning (0, "Array reference at %L is out of bounds "
4437 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4438 mpz_get_si (ar
->start
[i
]->value
.integer
),
4439 mpz_get_si (as
->lower
[i
]->value
.integer
),
4443 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4446 gfc_warning (0, "Array reference at %L is out of bounds "
4447 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4448 mpz_get_si (ar
->start
[i
]->value
.integer
),
4449 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4451 gfc_warning (0, "Array reference at %L is out of bounds "
4452 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4453 mpz_get_si (ar
->start
[i
]->value
.integer
),
4454 mpz_get_si (as
->upper
[i
]->value
.integer
),
4463 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4464 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4466 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4468 /* Check for zero stride, which is not allowed. */
4469 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4471 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4475 /* if start == len || (stride > 0 && start < len)
4476 || (stride < 0 && start > len),
4477 then the array section contains at least one element. In this
4478 case, there is an out-of-bounds access if
4479 (start < lower || start > upper). */
4480 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4481 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4482 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4483 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4484 && comp_start_end
== CMP_GT
))
4486 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4488 gfc_warning (0, "Lower array reference at %L is out of bounds "
4489 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4490 mpz_get_si (AR_START
->value
.integer
),
4491 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4494 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4496 gfc_warning (0, "Lower array reference at %L is out of bounds "
4497 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4498 mpz_get_si (AR_START
->value
.integer
),
4499 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4504 /* If we can compute the highest index of the array section,
4505 then it also has to be between lower and upper. */
4506 mpz_init (last_value
);
4507 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4510 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4512 gfc_warning (0, "Upper array reference at %L is out of bounds "
4513 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (last_value
),
4515 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4516 mpz_clear (last_value
);
4519 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4521 gfc_warning (0, "Upper array reference at %L is out of bounds "
4522 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4523 mpz_get_si (last_value
),
4524 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4525 mpz_clear (last_value
);
4529 mpz_clear (last_value
);
4537 gfc_internal_error ("check_dimension(): Bad array reference");
4544 /* Compare an array reference with an array specification. */
4547 compare_spec_to_ref (gfc_array_ref
*ar
)
4554 /* TODO: Full array sections are only allowed as actual parameters. */
4555 if (as
->type
== AS_ASSUMED_SIZE
4556 && (/*ar->type == AR_FULL
4557 ||*/ (ar
->type
== AR_SECTION
4558 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4560 gfc_error ("Rightmost upper bound of assumed size array section "
4561 "not specified at %L", &ar
->where
);
4565 if (ar
->type
== AR_FULL
)
4568 if (as
->rank
!= ar
->dimen
)
4570 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4571 &ar
->where
, ar
->dimen
, as
->rank
);
4575 /* ar->codimen == 0 is a local array. */
4576 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4578 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4579 &ar
->where
, ar
->codimen
, as
->corank
);
4583 for (i
= 0; i
< as
->rank
; i
++)
4584 if (!check_dimension (i
, ar
, as
))
4587 /* Local access has no coarray spec. */
4588 if (ar
->codimen
!= 0)
4589 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4591 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4592 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4594 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4595 i
+ 1 - as
->rank
, &ar
->where
);
4598 if (!check_dimension (i
, ar
, as
))
4606 /* Resolve one part of an array index. */
4609 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4610 int force_index_integer_kind
)
4617 if (!gfc_resolve_expr (index
))
4620 if (check_scalar
&& index
->rank
!= 0)
4622 gfc_error ("Array index at %L must be scalar", &index
->where
);
4626 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4628 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4629 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4633 if (index
->ts
.type
== BT_REAL
)
4634 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4638 if ((index
->ts
.kind
!= gfc_index_integer_kind
4639 && force_index_integer_kind
)
4640 || index
->ts
.type
!= BT_INTEGER
)
4643 ts
.type
= BT_INTEGER
;
4644 ts
.kind
= gfc_index_integer_kind
;
4646 gfc_convert_type_warn (index
, &ts
, 2, 0);
4652 /* Resolve one part of an array index. */
4655 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4657 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4660 /* Resolve a dim argument to an intrinsic function. */
4663 gfc_resolve_dim_arg (gfc_expr
*dim
)
4668 if (!gfc_resolve_expr (dim
))
4673 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4678 if (dim
->ts
.type
!= BT_INTEGER
)
4680 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4684 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4689 ts
.type
= BT_INTEGER
;
4690 ts
.kind
= gfc_index_integer_kind
;
4692 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4698 /* Given an expression that contains array references, update those array
4699 references to point to the right array specifications. While this is
4700 filled in during matching, this information is difficult to save and load
4701 in a module, so we take care of it here.
4703 The idea here is that the original array reference comes from the
4704 base symbol. We traverse the list of reference structures, setting
4705 the stored reference to references. Component references can
4706 provide an additional array specification. */
4709 find_array_spec (gfc_expr
*e
)
4715 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4716 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4718 as
= e
->symtree
->n
.sym
->as
;
4720 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4725 gfc_internal_error ("find_array_spec(): Missing spec");
4732 c
= ref
->u
.c
.component
;
4733 if (c
->attr
.dimension
)
4736 gfc_internal_error ("find_array_spec(): unused as(1)");
4747 gfc_internal_error ("find_array_spec(): unused as(2)");
4751 /* Resolve an array reference. */
4754 resolve_array_ref (gfc_array_ref
*ar
)
4756 int i
, check_scalar
;
4759 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4761 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4763 /* Do not force gfc_index_integer_kind for the start. We can
4764 do fine with any integer kind. This avoids temporary arrays
4765 created for indexing with a vector. */
4766 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4768 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4770 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4775 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4779 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4783 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4784 if (e
->expr_type
== EXPR_VARIABLE
4785 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4786 ar
->start
[i
] = gfc_get_parentheses (e
);
4790 gfc_error ("Array index at %L is an array of rank %d",
4791 &ar
->c_where
[i
], e
->rank
);
4795 /* Fill in the upper bound, which may be lower than the
4796 specified one for something like a(2:10:5), which is
4797 identical to a(2:7:5). Only relevant for strides not equal
4798 to one. Don't try a division by zero. */
4799 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4800 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4802 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4806 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4808 if (ar
->end
[i
] == NULL
)
4811 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4813 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4815 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4816 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4818 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4829 if (ar
->type
== AR_FULL
)
4831 if (ar
->as
->rank
== 0)
4832 ar
->type
= AR_ELEMENT
;
4834 /* Make sure array is the same as array(:,:), this way
4835 we don't need to special case all the time. */
4836 ar
->dimen
= ar
->as
->rank
;
4837 for (i
= 0; i
< ar
->dimen
; i
++)
4839 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4841 gcc_assert (ar
->start
[i
] == NULL
);
4842 gcc_assert (ar
->end
[i
] == NULL
);
4843 gcc_assert (ar
->stride
[i
] == NULL
);
4847 /* If the reference type is unknown, figure out what kind it is. */
4849 if (ar
->type
== AR_UNKNOWN
)
4851 ar
->type
= AR_ELEMENT
;
4852 for (i
= 0; i
< ar
->dimen
; i
++)
4853 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4854 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4856 ar
->type
= AR_SECTION
;
4861 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4864 if (ar
->as
->corank
&& ar
->codimen
== 0)
4867 ar
->codimen
= ar
->as
->corank
;
4868 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4869 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4877 resolve_substring (gfc_ref
*ref
)
4879 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4881 if (ref
->u
.ss
.start
!= NULL
)
4883 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4886 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4888 gfc_error ("Substring start index at %L must be of type INTEGER",
4889 &ref
->u
.ss
.start
->where
);
4893 if (ref
->u
.ss
.start
->rank
!= 0)
4895 gfc_error ("Substring start index at %L must be scalar",
4896 &ref
->u
.ss
.start
->where
);
4900 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4901 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4902 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4904 gfc_error ("Substring start index at %L is less than one",
4905 &ref
->u
.ss
.start
->where
);
4910 if (ref
->u
.ss
.end
!= NULL
)
4912 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4915 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4917 gfc_error ("Substring end index at %L must be of type INTEGER",
4918 &ref
->u
.ss
.end
->where
);
4922 if (ref
->u
.ss
.end
->rank
!= 0)
4924 gfc_error ("Substring end index at %L must be scalar",
4925 &ref
->u
.ss
.end
->where
);
4929 if (ref
->u
.ss
.length
!= NULL
4930 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4931 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4932 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4934 gfc_error ("Substring end index at %L exceeds the string length",
4935 &ref
->u
.ss
.start
->where
);
4939 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4940 gfc_integer_kinds
[k
].huge
) == CMP_GT
4941 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4942 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4944 gfc_error ("Substring end index at %L is too large",
4945 &ref
->u
.ss
.end
->where
);
4954 /* This function supplies missing substring charlens. */
4957 gfc_resolve_substring_charlen (gfc_expr
*e
)
4960 gfc_expr
*start
, *end
;
4961 gfc_typespec
*ts
= NULL
;
4963 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4965 if (char_ref
->type
== REF_SUBSTRING
)
4967 if (char_ref
->type
== REF_COMPONENT
)
4968 ts
= &char_ref
->u
.c
.component
->ts
;
4974 gcc_assert (char_ref
->next
== NULL
);
4978 if (e
->ts
.u
.cl
->length
)
4979 gfc_free_expr (e
->ts
.u
.cl
->length
);
4980 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4984 e
->ts
.type
= BT_CHARACTER
;
4985 e
->ts
.kind
= gfc_default_character_kind
;
4988 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4990 if (char_ref
->u
.ss
.start
)
4991 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4993 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4995 if (char_ref
->u
.ss
.end
)
4996 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4997 else if (e
->expr_type
== EXPR_VARIABLE
)
5000 ts
= &e
->symtree
->n
.sym
->ts
;
5001 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5008 gfc_free_expr (start
);
5009 gfc_free_expr (end
);
5013 /* Length = (end - start + 1). */
5014 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5015 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5016 gfc_get_int_expr (gfc_charlen_int_kind
,
5019 /* F2008, 6.4.1: Both the starting point and the ending point shall
5020 be within the range 1, 2, ..., n unless the starting point exceeds
5021 the ending point, in which case the substring has length zero. */
5023 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5024 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5026 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5027 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5029 /* Make sure that the length is simplified. */
5030 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5031 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5035 /* Resolve subtype references. */
5038 resolve_ref (gfc_expr
*expr
)
5040 int current_part_dimension
, n_components
, seen_part_dimension
;
5043 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5044 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5046 find_array_spec (expr
);
5050 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5054 if (!resolve_array_ref (&ref
->u
.ar
))
5062 if (!resolve_substring (ref
))
5067 /* Check constraints on part references. */
5069 current_part_dimension
= 0;
5070 seen_part_dimension
= 0;
5073 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5078 switch (ref
->u
.ar
.type
)
5081 /* Coarray scalar. */
5082 if (ref
->u
.ar
.as
->rank
== 0)
5084 current_part_dimension
= 0;
5089 current_part_dimension
= 1;
5093 current_part_dimension
= 0;
5097 gfc_internal_error ("resolve_ref(): Bad array reference");
5103 if (current_part_dimension
|| seen_part_dimension
)
5106 if (ref
->u
.c
.component
->attr
.pointer
5107 || ref
->u
.c
.component
->attr
.proc_pointer
5108 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5109 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5111 gfc_error ("Component to the right of a part reference "
5112 "with nonzero rank must not have the POINTER "
5113 "attribute at %L", &expr
->where
);
5116 else if (ref
->u
.c
.component
->attr
.allocatable
5117 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5118 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5121 gfc_error ("Component to the right of a part reference "
5122 "with nonzero rank must not have the ALLOCATABLE "
5123 "attribute at %L", &expr
->where
);
5135 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5136 || ref
->next
== NULL
)
5137 && current_part_dimension
5138 && seen_part_dimension
)
5140 gfc_error ("Two or more part references with nonzero rank must "
5141 "not be specified at %L", &expr
->where
);
5145 if (ref
->type
== REF_COMPONENT
)
5147 if (current_part_dimension
)
5148 seen_part_dimension
= 1;
5150 /* reset to make sure */
5151 current_part_dimension
= 0;
5159 /* Given an expression, determine its shape. This is easier than it sounds.
5160 Leaves the shape array NULL if it is not possible to determine the shape. */
5163 expression_shape (gfc_expr
*e
)
5165 mpz_t array
[GFC_MAX_DIMENSIONS
];
5168 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5171 for (i
= 0; i
< e
->rank
; i
++)
5172 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5175 e
->shape
= gfc_get_shape (e
->rank
);
5177 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5182 for (i
--; i
>= 0; i
--)
5183 mpz_clear (array
[i
]);
5187 /* Given a variable expression node, compute the rank of the expression by
5188 examining the base symbol and any reference structures it may have. */
5191 expression_rank (gfc_expr
*e
)
5196 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5197 could lead to serious confusion... */
5198 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5202 if (e
->expr_type
== EXPR_ARRAY
)
5204 /* Constructors can have a rank different from one via RESHAPE(). */
5206 if (e
->symtree
== NULL
)
5212 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5213 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5219 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5221 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5222 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5223 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5225 if (ref
->type
!= REF_ARRAY
)
5228 if (ref
->u
.ar
.type
== AR_FULL
)
5230 rank
= ref
->u
.ar
.as
->rank
;
5234 if (ref
->u
.ar
.type
== AR_SECTION
)
5236 /* Figure out the rank of the section. */
5238 gfc_internal_error ("expression_rank(): Two array specs");
5240 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5241 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5242 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5252 expression_shape (e
);
5257 add_caf_get_intrinsic (gfc_expr
*e
)
5259 gfc_expr
*wrapper
, *tmp_expr
;
5263 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5264 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5269 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5270 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5273 tmp_expr
= XCNEW (gfc_expr
);
5275 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5276 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5277 wrapper
->ts
= e
->ts
;
5278 wrapper
->rank
= e
->rank
;
5280 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5287 remove_caf_get_intrinsic (gfc_expr
*e
)
5289 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5290 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5291 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5292 e
->value
.function
.actual
->expr
= NULL
;
5293 gfc_free_actual_arglist (e
->value
.function
.actual
);
5294 gfc_free_shape (&e
->shape
, e
->rank
);
5300 /* Resolve a variable expression. */
5303 resolve_variable (gfc_expr
*e
)
5310 if (e
->symtree
== NULL
)
5312 sym
= e
->symtree
->n
.sym
;
5314 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5315 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5316 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5318 if (!actual_arg
|| inquiry_argument
)
5320 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5321 "be used as actual argument", sym
->name
, &e
->where
);
5325 /* TS 29113, 407b. */
5326 else if (e
->ts
.type
== BT_ASSUMED
)
5330 gfc_error ("Assumed-type variable %s at %L may only be used "
5331 "as actual argument", sym
->name
, &e
->where
);
5334 else if (inquiry_argument
&& !first_actual_arg
)
5336 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5337 for all inquiry functions in resolve_function; the reason is
5338 that the function-name resolution happens too late in that
5340 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5341 "an inquiry function shall be the first argument",
5342 sym
->name
, &e
->where
);
5346 /* TS 29113, C535b. */
5347 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5348 && CLASS_DATA (sym
)->as
5349 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5350 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5351 && sym
->as
->type
== AS_ASSUMED_RANK
))
5355 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5356 "actual argument", sym
->name
, &e
->where
);
5359 else if (inquiry_argument
&& !first_actual_arg
)
5361 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5362 for all inquiry functions in resolve_function; the reason is
5363 that the function-name resolution happens too late in that
5365 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5366 "to an inquiry function shall be the first argument",
5367 sym
->name
, &e
->where
);
5372 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5373 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5374 && e
->ref
->next
== NULL
))
5376 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5377 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5380 /* TS 29113, 407b. */
5381 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5382 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5383 && e
->ref
->next
== NULL
))
5385 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5386 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5390 /* TS 29113, C535b. */
5391 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5392 && CLASS_DATA (sym
)->as
5393 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5394 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5395 && sym
->as
->type
== AS_ASSUMED_RANK
))
5397 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5398 && e
->ref
->next
== NULL
))
5400 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5401 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5405 /* For variables that are used in an associate (target => object) where
5406 the object's basetype is array valued while the target is scalar,
5407 the ts' type of the component refs is still array valued, which
5408 can't be translated that way. */
5409 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5410 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5411 && CLASS_DATA (sym
->assoc
->target
)->as
)
5413 gfc_ref
*ref
= e
->ref
;
5419 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5420 /* Stop the loop. */
5430 /* If this is an associate-name, it may be parsed with an array reference
5431 in error even though the target is scalar. Fail directly in this case.
5432 TODO Understand why class scalar expressions must be excluded. */
5433 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5435 if (sym
->ts
.type
== BT_CLASS
)
5436 gfc_fix_class_refs (e
);
5437 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5441 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5442 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5444 /* On the other hand, the parser may not have known this is an array;
5445 in this case, we have to add a FULL reference. */
5446 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5448 e
->ref
= gfc_get_ref ();
5449 e
->ref
->type
= REF_ARRAY
;
5450 e
->ref
->u
.ar
.type
= AR_FULL
;
5451 e
->ref
->u
.ar
.dimen
= 0;
5454 /* Like above, but for class types, where the checking whether an array
5455 ref is present is more complicated. Furthermore make sure not to add
5456 the full array ref to _vptr or _len refs. */
5457 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5458 && CLASS_DATA (sym
)->attr
.dimension
5459 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5461 gfc_ref
*ref
, *newref
;
5463 newref
= gfc_get_ref ();
5464 newref
->type
= REF_ARRAY
;
5465 newref
->u
.ar
.type
= AR_FULL
;
5466 newref
->u
.ar
.dimen
= 0;
5467 /* Because this is an associate var and the first ref either is a ref to
5468 the _data component or not, no traversal of the ref chain is
5469 needed. The array ref needs to be inserted after the _data ref,
5470 or when that is not present, which may happend for polymorphic
5471 types, then at the first position. */
5475 else if (ref
->type
== REF_COMPONENT
5476 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5478 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5480 newref
->next
= ref
->next
;
5484 /* Array ref present already. */
5485 gfc_free_ref_list (newref
);
5487 else if (ref
->type
== REF_ARRAY
)
5488 /* Array ref present already. */
5489 gfc_free_ref_list (newref
);
5497 if (e
->ref
&& !resolve_ref (e
))
5500 if (sym
->attr
.flavor
== FL_PROCEDURE
5501 && (!sym
->attr
.function
5502 || (sym
->attr
.function
&& sym
->result
5503 && sym
->result
->attr
.proc_pointer
5504 && !sym
->result
->attr
.function
)))
5506 e
->ts
.type
= BT_PROCEDURE
;
5507 goto resolve_procedure
;
5510 if (sym
->ts
.type
!= BT_UNKNOWN
)
5511 gfc_variable_attr (e
, &e
->ts
);
5512 else if (sym
->attr
.flavor
== FL_PROCEDURE
5513 && sym
->attr
.function
&& sym
->result
5514 && sym
->result
->ts
.type
!= BT_UNKNOWN
5515 && sym
->result
->attr
.proc_pointer
)
5516 e
->ts
= sym
->result
->ts
;
5519 /* Must be a simple variable reference. */
5520 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5525 if (check_assumed_size_reference (sym
, e
))
5528 /* Deal with forward references to entries during gfc_resolve_code, to
5529 satisfy, at least partially, 12.5.2.5. */
5530 if (gfc_current_ns
->entries
5531 && current_entry_id
== sym
->entry_id
5534 && cs_base
->current
->op
!= EXEC_ENTRY
)
5536 gfc_entry_list
*entry
;
5537 gfc_formal_arglist
*formal
;
5539 bool seen
, saved_specification_expr
;
5541 /* If the symbol is a dummy... */
5542 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5544 entry
= gfc_current_ns
->entries
;
5547 /* ...test if the symbol is a parameter of previous entries. */
5548 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5549 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5551 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5558 /* If it has not been seen as a dummy, this is an error. */
5561 if (specification_expr
)
5562 gfc_error ("Variable %qs, used in a specification expression"
5563 ", is referenced at %L before the ENTRY statement "
5564 "in which it is a parameter",
5565 sym
->name
, &cs_base
->current
->loc
);
5567 gfc_error ("Variable %qs is used at %L before the ENTRY "
5568 "statement in which it is a parameter",
5569 sym
->name
, &cs_base
->current
->loc
);
5574 /* Now do the same check on the specification expressions. */
5575 saved_specification_expr
= specification_expr
;
5576 specification_expr
= true;
5577 if (sym
->ts
.type
== BT_CHARACTER
5578 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5582 for (n
= 0; n
< sym
->as
->rank
; n
++)
5584 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5586 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5589 specification_expr
= saved_specification_expr
;
5592 /* Update the symbol's entry level. */
5593 sym
->entry_id
= current_entry_id
+ 1;
5596 /* If a symbol has been host_associated mark it. This is used latter,
5597 to identify if aliasing is possible via host association. */
5598 if (sym
->attr
.flavor
== FL_VARIABLE
5599 && gfc_current_ns
->parent
5600 && (gfc_current_ns
->parent
== sym
->ns
5601 || (gfc_current_ns
->parent
->parent
5602 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5603 sym
->attr
.host_assoc
= 1;
5605 if (gfc_current_ns
->proc_name
5606 && sym
->attr
.dimension
5607 && (sym
->ns
!= gfc_current_ns
5608 || sym
->attr
.use_assoc
5609 || sym
->attr
.in_common
))
5610 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5613 if (t
&& !resolve_procedure_expression (e
))
5616 /* F2008, C617 and C1229. */
5617 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5618 && gfc_is_coindexed (e
))
5620 gfc_ref
*ref
, *ref2
= NULL
;
5622 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5624 if (ref
->type
== REF_COMPONENT
)
5626 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5630 for ( ; ref
; ref
= ref
->next
)
5631 if (ref
->type
== REF_COMPONENT
)
5634 /* Expression itself is not coindexed object. */
5635 if (ref
&& e
->ts
.type
== BT_CLASS
)
5637 gfc_error ("Polymorphic subobject of coindexed object at %L",
5642 /* Expression itself is coindexed object. */
5646 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5647 for ( ; c
; c
= c
->next
)
5648 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5650 gfc_error ("Coindexed object with polymorphic allocatable "
5651 "subcomponent at %L", &e
->where
);
5659 expression_rank (e
);
5661 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5662 add_caf_get_intrinsic (e
);
5664 /* Simplify cases where access to a parameter array results in a
5665 single constant. Suppress errors since those will have been
5666 issued before, as warnings. */
5667 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5669 gfc_push_suppress_errors ();
5670 gfc_simplify_expr (e
, 1);
5671 gfc_pop_suppress_errors ();
5678 /* Checks to see that the correct symbol has been host associated.
5679 The only situation where this arises is that in which a twice
5680 contained function is parsed after the host association is made.
5681 Therefore, on detecting this, change the symbol in the expression
5682 and convert the array reference into an actual arglist if the old
5683 symbol is a variable. */
5685 check_host_association (gfc_expr
*e
)
5687 gfc_symbol
*sym
, *old_sym
;
5691 gfc_actual_arglist
*arg
, *tail
= NULL
;
5692 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5694 /* If the expression is the result of substitution in
5695 interface.c(gfc_extend_expr) because there is no way in
5696 which the host association can be wrong. */
5697 if (e
->symtree
== NULL
5698 || e
->symtree
->n
.sym
== NULL
5699 || e
->user_operator
)
5702 old_sym
= e
->symtree
->n
.sym
;
5704 if (gfc_current_ns
->parent
5705 && old_sym
->ns
!= gfc_current_ns
)
5707 /* Use the 'USE' name so that renamed module symbols are
5708 correctly handled. */
5709 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5711 if (sym
&& old_sym
!= sym
5712 && sym
->ts
.type
== old_sym
->ts
.type
5713 && sym
->attr
.flavor
== FL_PROCEDURE
5714 && sym
->attr
.contained
)
5716 /* Clear the shape, since it might not be valid. */
5717 gfc_free_shape (&e
->shape
, e
->rank
);
5719 /* Give the expression the right symtree! */
5720 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5721 gcc_assert (st
!= NULL
);
5723 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5724 || e
->expr_type
== EXPR_FUNCTION
)
5726 /* Original was function so point to the new symbol, since
5727 the actual argument list is already attached to the
5729 e
->value
.function
.esym
= NULL
;
5734 /* Original was variable so convert array references into
5735 an actual arglist. This does not need any checking now
5736 since resolve_function will take care of it. */
5737 e
->value
.function
.actual
= NULL
;
5738 e
->expr_type
= EXPR_FUNCTION
;
5741 /* Ambiguity will not arise if the array reference is not
5742 the last reference. */
5743 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5744 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5747 gcc_assert (ref
->type
== REF_ARRAY
);
5749 /* Grab the start expressions from the array ref and
5750 copy them into actual arguments. */
5751 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5753 arg
= gfc_get_actual_arglist ();
5754 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5755 if (e
->value
.function
.actual
== NULL
)
5756 tail
= e
->value
.function
.actual
= arg
;
5764 /* Dump the reference list and set the rank. */
5765 gfc_free_ref_list (e
->ref
);
5767 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5770 gfc_resolve_expr (e
);
5774 /* This might have changed! */
5775 return e
->expr_type
== EXPR_FUNCTION
;
5780 gfc_resolve_character_operator (gfc_expr
*e
)
5782 gfc_expr
*op1
= e
->value
.op
.op1
;
5783 gfc_expr
*op2
= e
->value
.op
.op2
;
5784 gfc_expr
*e1
= NULL
;
5785 gfc_expr
*e2
= NULL
;
5787 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5789 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5790 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5791 else if (op1
->expr_type
== EXPR_CONSTANT
)
5792 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5793 op1
->value
.character
.length
);
5795 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5796 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5797 else if (op2
->expr_type
== EXPR_CONSTANT
)
5798 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5799 op2
->value
.character
.length
);
5801 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5811 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5812 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5813 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5814 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5815 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5821 /* Ensure that an character expression has a charlen and, if possible, a
5822 length expression. */
5825 fixup_charlen (gfc_expr
*e
)
5827 /* The cases fall through so that changes in expression type and the need
5828 for multiple fixes are picked up. In all circumstances, a charlen should
5829 be available for the middle end to hang a backend_decl on. */
5830 switch (e
->expr_type
)
5833 gfc_resolve_character_operator (e
);
5837 if (e
->expr_type
== EXPR_ARRAY
)
5838 gfc_resolve_character_array_constructor (e
);
5841 case EXPR_SUBSTRING
:
5842 if (!e
->ts
.u
.cl
&& e
->ref
)
5843 gfc_resolve_substring_charlen (e
);
5848 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5855 /* Update an actual argument to include the passed-object for type-bound
5856 procedures at the right position. */
5858 static gfc_actual_arglist
*
5859 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5862 gcc_assert (argpos
> 0);
5866 gfc_actual_arglist
* result
;
5868 result
= gfc_get_actual_arglist ();
5872 result
->name
= name
;
5878 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5880 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5885 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5888 extract_compcall_passed_object (gfc_expr
* e
)
5892 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5894 if (e
->value
.compcall
.base_object
)
5895 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5898 po
= gfc_get_expr ();
5899 po
->expr_type
= EXPR_VARIABLE
;
5900 po
->symtree
= e
->symtree
;
5901 po
->ref
= gfc_copy_ref (e
->ref
);
5902 po
->where
= e
->where
;
5905 if (!gfc_resolve_expr (po
))
5912 /* Update the arglist of an EXPR_COMPCALL expression to include the
5916 update_compcall_arglist (gfc_expr
* e
)
5919 gfc_typebound_proc
* tbp
;
5921 tbp
= e
->value
.compcall
.tbp
;
5926 po
= extract_compcall_passed_object (e
);
5930 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5936 if (tbp
->pass_arg_num
<= 0)
5939 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5947 /* Extract the passed object from a PPC call (a copy of it). */
5950 extract_ppc_passed_object (gfc_expr
*e
)
5955 po
= gfc_get_expr ();
5956 po
->expr_type
= EXPR_VARIABLE
;
5957 po
->symtree
= e
->symtree
;
5958 po
->ref
= gfc_copy_ref (e
->ref
);
5959 po
->where
= e
->where
;
5961 /* Remove PPC reference. */
5963 while ((*ref
)->next
)
5964 ref
= &(*ref
)->next
;
5965 gfc_free_ref_list (*ref
);
5968 if (!gfc_resolve_expr (po
))
5975 /* Update the actual arglist of a procedure pointer component to include the
5979 update_ppc_arglist (gfc_expr
* e
)
5983 gfc_typebound_proc
* tb
;
5985 ppc
= gfc_get_proc_ptr_comp (e
);
5993 else if (tb
->nopass
)
5996 po
= extract_ppc_passed_object (e
);
6003 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6008 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6010 gfc_error ("Base object for procedure-pointer component call at %L is of"
6011 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6015 gcc_assert (tb
->pass_arg_num
> 0);
6016 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6024 /* Check that the object a TBP is called on is valid, i.e. it must not be
6025 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6028 check_typebound_baseobject (gfc_expr
* e
)
6031 bool return_value
= false;
6033 base
= extract_compcall_passed_object (e
);
6037 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6039 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6043 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6045 gfc_error ("Base object for type-bound procedure call at %L is of"
6046 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6050 /* F08:C1230. If the procedure called is NOPASS,
6051 the base object must be scalar. */
6052 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6054 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6055 " be scalar", &e
->where
);
6059 return_value
= true;
6062 gfc_free_expr (base
);
6063 return return_value
;
6067 /* Resolve a call to a type-bound procedure, either function or subroutine,
6068 statically from the data in an EXPR_COMPCALL expression. The adapted
6069 arglist and the target-procedure symtree are returned. */
6072 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6073 gfc_actual_arglist
** actual
)
6075 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6076 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6078 /* Update the actual arglist for PASS. */
6079 if (!update_compcall_arglist (e
))
6082 *actual
= e
->value
.compcall
.actual
;
6083 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6085 gfc_free_ref_list (e
->ref
);
6087 e
->value
.compcall
.actual
= NULL
;
6089 /* If we find a deferred typebound procedure, check for derived types
6090 that an overriding typebound procedure has not been missed. */
6091 if (e
->value
.compcall
.name
6092 && !e
->value
.compcall
.tbp
->non_overridable
6093 && e
->value
.compcall
.base_object
6094 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6097 gfc_symbol
*derived
;
6099 /* Use the derived type of the base_object. */
6100 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6103 /* If necessary, go through the inheritance chain. */
6104 while (!st
&& derived
)
6106 /* Look for the typebound procedure 'name'. */
6107 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6108 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6109 e
->value
.compcall
.name
);
6111 derived
= gfc_get_derived_super_type (derived
);
6114 /* Now find the specific name in the derived type namespace. */
6115 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6116 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6117 derived
->ns
, 1, &st
);
6125 /* Get the ultimate declared type from an expression. In addition,
6126 return the last class/derived type reference and the copy of the
6127 reference list. If check_types is set true, derived types are
6128 identified as well as class references. */
6130 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6131 gfc_expr
*e
, bool check_types
)
6133 gfc_symbol
*declared
;
6140 *new_ref
= gfc_copy_ref (e
->ref
);
6142 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6144 if (ref
->type
!= REF_COMPONENT
)
6147 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6148 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6149 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6151 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6157 if (declared
== NULL
)
6158 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6164 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6165 which of the specific bindings (if any) matches the arglist and transform
6166 the expression into a call of that binding. */
6169 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6171 gfc_typebound_proc
* genproc
;
6172 const char* genname
;
6174 gfc_symbol
*derived
;
6176 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6177 genname
= e
->value
.compcall
.name
;
6178 genproc
= e
->value
.compcall
.tbp
;
6180 if (!genproc
->is_generic
)
6183 /* Try the bindings on this type and in the inheritance hierarchy. */
6184 for (; genproc
; genproc
= genproc
->overridden
)
6188 gcc_assert (genproc
->is_generic
);
6189 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6192 gfc_actual_arglist
* args
;
6195 gcc_assert (g
->specific
);
6197 if (g
->specific
->error
)
6200 target
= g
->specific
->u
.specific
->n
.sym
;
6202 /* Get the right arglist by handling PASS/NOPASS. */
6203 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6204 if (!g
->specific
->nopass
)
6207 po
= extract_compcall_passed_object (e
);
6210 gfc_free_actual_arglist (args
);
6214 gcc_assert (g
->specific
->pass_arg_num
> 0);
6215 gcc_assert (!g
->specific
->error
);
6216 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6217 g
->specific
->pass_arg
);
6219 resolve_actual_arglist (args
, target
->attr
.proc
,
6220 is_external_proc (target
)
6221 && gfc_sym_get_dummy_args (target
) == NULL
);
6223 /* Check if this arglist matches the formal. */
6224 matches
= gfc_arglist_matches_symbol (&args
, target
);
6226 /* Clean up and break out of the loop if we've found it. */
6227 gfc_free_actual_arglist (args
);
6230 e
->value
.compcall
.tbp
= g
->specific
;
6231 genname
= g
->specific_st
->name
;
6232 /* Pass along the name for CLASS methods, where the vtab
6233 procedure pointer component has to be referenced. */
6241 /* Nothing matching found! */
6242 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6243 " %qs at %L", genname
, &e
->where
);
6247 /* Make sure that we have the right specific instance for the name. */
6248 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6250 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6252 e
->value
.compcall
.tbp
= st
->n
.tb
;
6258 /* Resolve a call to a type-bound subroutine. */
6261 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6263 gfc_actual_arglist
* newactual
;
6264 gfc_symtree
* target
;
6266 /* Check that's really a SUBROUTINE. */
6267 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6269 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6270 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6271 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6272 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6273 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6276 gfc_error ("%qs at %L should be a SUBROUTINE",
6277 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6282 if (!check_typebound_baseobject (c
->expr1
))
6285 /* Pass along the name for CLASS methods, where the vtab
6286 procedure pointer component has to be referenced. */
6288 *name
= c
->expr1
->value
.compcall
.name
;
6290 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6293 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6295 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6297 /* Transform into an ordinary EXEC_CALL for now. */
6299 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6302 c
->ext
.actual
= newactual
;
6303 c
->symtree
= target
;
6304 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6306 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6308 gfc_free_expr (c
->expr1
);
6309 c
->expr1
= gfc_get_expr ();
6310 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6311 c
->expr1
->symtree
= target
;
6312 c
->expr1
->where
= c
->loc
;
6314 return resolve_call (c
);
6318 /* Resolve a component-call expression. */
6320 resolve_compcall (gfc_expr
* e
, const char **name
)
6322 gfc_actual_arglist
* newactual
;
6323 gfc_symtree
* target
;
6325 /* Check that's really a FUNCTION. */
6326 if (!e
->value
.compcall
.tbp
->function
)
6328 gfc_error ("%qs at %L should be a FUNCTION",
6329 e
->value
.compcall
.name
, &e
->where
);
6333 /* These must not be assign-calls! */
6334 gcc_assert (!e
->value
.compcall
.assign
);
6336 if (!check_typebound_baseobject (e
))
6339 /* Pass along the name for CLASS methods, where the vtab
6340 procedure pointer component has to be referenced. */
6342 *name
= e
->value
.compcall
.name
;
6344 if (!resolve_typebound_generic_call (e
, name
))
6346 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6348 /* Take the rank from the function's symbol. */
6349 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6350 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6352 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6353 arglist to the TBP's binding target. */
6355 if (!resolve_typebound_static (e
, &target
, &newactual
))
6358 e
->value
.function
.actual
= newactual
;
6359 e
->value
.function
.name
= NULL
;
6360 e
->value
.function
.esym
= target
->n
.sym
;
6361 e
->value
.function
.isym
= NULL
;
6362 e
->symtree
= target
;
6363 e
->ts
= target
->n
.sym
->ts
;
6364 e
->expr_type
= EXPR_FUNCTION
;
6366 /* Resolution is not necessary if this is a class subroutine; this
6367 function only has to identify the specific proc. Resolution of
6368 the call will be done next in resolve_typebound_call. */
6369 return gfc_resolve_expr (e
);
6373 static bool resolve_fl_derived (gfc_symbol
*sym
);
6376 /* Resolve a typebound function, or 'method'. First separate all
6377 the non-CLASS references by calling resolve_compcall directly. */
6380 resolve_typebound_function (gfc_expr
* e
)
6382 gfc_symbol
*declared
;
6394 /* Deal with typebound operators for CLASS objects. */
6395 expr
= e
->value
.compcall
.base_object
;
6396 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6397 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6399 /* If the base_object is not a variable, the corresponding actual
6400 argument expression must be stored in e->base_expression so
6401 that the corresponding tree temporary can be used as the base
6402 object in gfc_conv_procedure_call. */
6403 if (expr
->expr_type
!= EXPR_VARIABLE
)
6405 gfc_actual_arglist
*args
;
6407 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6409 if (expr
== args
->expr
)
6414 /* Since the typebound operators are generic, we have to ensure
6415 that any delays in resolution are corrected and that the vtab
6418 declared
= ts
.u
.derived
;
6419 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6420 if (c
->ts
.u
.derived
== NULL
)
6421 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6423 if (!resolve_compcall (e
, &name
))
6426 /* Use the generic name if it is there. */
6427 name
= name
? name
: e
->value
.function
.esym
->name
;
6428 e
->symtree
= expr
->symtree
;
6429 e
->ref
= gfc_copy_ref (expr
->ref
);
6430 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6432 /* Trim away the extraneous references that emerge from nested
6433 use of interface.c (extend_expr). */
6434 if (class_ref
&& class_ref
->next
)
6436 gfc_free_ref_list (class_ref
->next
);
6437 class_ref
->next
= NULL
;
6439 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6441 gfc_free_ref_list (e
->ref
);
6445 gfc_add_vptr_component (e
);
6446 gfc_add_component_ref (e
, name
);
6447 e
->value
.function
.esym
= NULL
;
6448 if (expr
->expr_type
!= EXPR_VARIABLE
)
6449 e
->base_expr
= expr
;
6454 return resolve_compcall (e
, NULL
);
6456 if (!resolve_ref (e
))
6459 /* Get the CLASS declared type. */
6460 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6462 if (!resolve_fl_derived (declared
))
6465 /* Weed out cases of the ultimate component being a derived type. */
6466 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6467 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6469 gfc_free_ref_list (new_ref
);
6470 return resolve_compcall (e
, NULL
);
6473 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6474 declared
= c
->ts
.u
.derived
;
6476 /* Treat the call as if it is a typebound procedure, in order to roll
6477 out the correct name for the specific function. */
6478 if (!resolve_compcall (e
, &name
))
6480 gfc_free_ref_list (new_ref
);
6487 /* Convert the expression to a procedure pointer component call. */
6488 e
->value
.function
.esym
= NULL
;
6494 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6495 gfc_add_vptr_component (e
);
6496 gfc_add_component_ref (e
, name
);
6498 /* Recover the typespec for the expression. This is really only
6499 necessary for generic procedures, where the additional call
6500 to gfc_add_component_ref seems to throw the collection of the
6501 correct typespec. */
6505 gfc_free_ref_list (new_ref
);
6510 /* Resolve a typebound subroutine, or 'method'. First separate all
6511 the non-CLASS references by calling resolve_typebound_call
6515 resolve_typebound_subroutine (gfc_code
*code
)
6517 gfc_symbol
*declared
;
6527 st
= code
->expr1
->symtree
;
6529 /* Deal with typebound operators for CLASS objects. */
6530 expr
= code
->expr1
->value
.compcall
.base_object
;
6531 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6532 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6534 /* If the base_object is not a variable, the corresponding actual
6535 argument expression must be stored in e->base_expression so
6536 that the corresponding tree temporary can be used as the base
6537 object in gfc_conv_procedure_call. */
6538 if (expr
->expr_type
!= EXPR_VARIABLE
)
6540 gfc_actual_arglist
*args
;
6542 args
= code
->expr1
->value
.function
.actual
;
6543 for (; args
; args
= args
->next
)
6544 if (expr
== args
->expr
)
6548 /* Since the typebound operators are generic, we have to ensure
6549 that any delays in resolution are corrected and that the vtab
6551 declared
= expr
->ts
.u
.derived
;
6552 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6553 if (c
->ts
.u
.derived
== NULL
)
6554 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6556 if (!resolve_typebound_call (code
, &name
, NULL
))
6559 /* Use the generic name if it is there. */
6560 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6561 code
->expr1
->symtree
= expr
->symtree
;
6562 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6564 /* Trim away the extraneous references that emerge from nested
6565 use of interface.c (extend_expr). */
6566 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6567 if (class_ref
&& class_ref
->next
)
6569 gfc_free_ref_list (class_ref
->next
);
6570 class_ref
->next
= NULL
;
6572 else if (code
->expr1
->ref
&& !class_ref
)
6574 gfc_free_ref_list (code
->expr1
->ref
);
6575 code
->expr1
->ref
= NULL
;
6578 /* Now use the procedure in the vtable. */
6579 gfc_add_vptr_component (code
->expr1
);
6580 gfc_add_component_ref (code
->expr1
, name
);
6581 code
->expr1
->value
.function
.esym
= NULL
;
6582 if (expr
->expr_type
!= EXPR_VARIABLE
)
6583 code
->expr1
->base_expr
= expr
;
6588 return resolve_typebound_call (code
, NULL
, NULL
);
6590 if (!resolve_ref (code
->expr1
))
6593 /* Get the CLASS declared type. */
6594 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6596 /* Weed out cases of the ultimate component being a derived type. */
6597 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6598 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6600 gfc_free_ref_list (new_ref
);
6601 return resolve_typebound_call (code
, NULL
, NULL
);
6604 if (!resolve_typebound_call (code
, &name
, &overridable
))
6606 gfc_free_ref_list (new_ref
);
6609 ts
= code
->expr1
->ts
;
6613 /* Convert the expression to a procedure pointer component call. */
6614 code
->expr1
->value
.function
.esym
= NULL
;
6615 code
->expr1
->symtree
= st
;
6618 code
->expr1
->ref
= new_ref
;
6620 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6621 gfc_add_vptr_component (code
->expr1
);
6622 gfc_add_component_ref (code
->expr1
, name
);
6624 /* Recover the typespec for the expression. This is really only
6625 necessary for generic procedures, where the additional call
6626 to gfc_add_component_ref seems to throw the collection of the
6627 correct typespec. */
6628 code
->expr1
->ts
= ts
;
6631 gfc_free_ref_list (new_ref
);
6637 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6640 resolve_ppc_call (gfc_code
* c
)
6642 gfc_component
*comp
;
6644 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6645 gcc_assert (comp
!= NULL
);
6647 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6648 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6650 if (!comp
->attr
.subroutine
)
6651 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6653 if (!resolve_ref (c
->expr1
))
6656 if (!update_ppc_arglist (c
->expr1
))
6659 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6661 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6662 !(comp
->ts
.interface
6663 && comp
->ts
.interface
->formal
)))
6666 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6669 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6675 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6678 resolve_expr_ppc (gfc_expr
* e
)
6680 gfc_component
*comp
;
6682 comp
= gfc_get_proc_ptr_comp (e
);
6683 gcc_assert (comp
!= NULL
);
6685 /* Convert to EXPR_FUNCTION. */
6686 e
->expr_type
= EXPR_FUNCTION
;
6687 e
->value
.function
.isym
= NULL
;
6688 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6690 if (comp
->as
!= NULL
)
6691 e
->rank
= comp
->as
->rank
;
6693 if (!comp
->attr
.function
)
6694 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6696 if (!resolve_ref (e
))
6699 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6700 !(comp
->ts
.interface
6701 && comp
->ts
.interface
->formal
)))
6704 if (!update_ppc_arglist (e
))
6707 if (!check_pure_function(e
))
6710 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6717 gfc_is_expandable_expr (gfc_expr
*e
)
6719 gfc_constructor
*con
;
6721 if (e
->expr_type
== EXPR_ARRAY
)
6723 /* Traverse the constructor looking for variables that are flavor
6724 parameter. Parameters must be expanded since they are fully used at
6726 con
= gfc_constructor_first (e
->value
.constructor
);
6727 for (; con
; con
= gfc_constructor_next (con
))
6729 if (con
->expr
->expr_type
== EXPR_VARIABLE
6730 && con
->expr
->symtree
6731 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6732 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6734 if (con
->expr
->expr_type
== EXPR_ARRAY
6735 && gfc_is_expandable_expr (con
->expr
))
6744 /* Sometimes variables in specification expressions of the result
6745 of module procedures in submodules wind up not being the 'real'
6746 dummy. Find this, if possible, in the namespace of the first
6750 fixup_unique_dummy (gfc_expr
*e
)
6752 gfc_symtree
*st
= NULL
;
6753 gfc_symbol
*s
= NULL
;
6755 if (e
->symtree
->n
.sym
->ns
->proc_name
6756 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6757 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6760 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6763 && st
->n
.sym
!= NULL
6764 && st
->n
.sym
->attr
.dummy
)
6768 /* Resolve an expression. That is, make sure that types of operands agree
6769 with their operators, intrinsic operators are converted to function calls
6770 for overloaded types and unresolved function references are resolved. */
6773 gfc_resolve_expr (gfc_expr
*e
)
6776 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6781 /* inquiry_argument only applies to variables. */
6782 inquiry_save
= inquiry_argument
;
6783 actual_arg_save
= actual_arg
;
6784 first_actual_arg_save
= first_actual_arg
;
6786 if (e
->expr_type
!= EXPR_VARIABLE
)
6788 inquiry_argument
= false;
6790 first_actual_arg
= false;
6792 else if (e
->symtree
!= NULL
6793 && *e
->symtree
->name
== '@'
6794 && e
->symtree
->n
.sym
->attr
.dummy
)
6796 /* Deal with submodule specification expressions that are not
6797 found to be referenced in module.c(read_cleanup). */
6798 fixup_unique_dummy (e
);
6801 switch (e
->expr_type
)
6804 t
= resolve_operator (e
);
6810 if (check_host_association (e
))
6811 t
= resolve_function (e
);
6813 t
= resolve_variable (e
);
6815 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6816 && e
->ref
->type
!= REF_SUBSTRING
)
6817 gfc_resolve_substring_charlen (e
);
6822 t
= resolve_typebound_function (e
);
6825 case EXPR_SUBSTRING
:
6826 t
= resolve_ref (e
);
6835 t
= resolve_expr_ppc (e
);
6840 if (!resolve_ref (e
))
6843 t
= gfc_resolve_array_constructor (e
);
6844 /* Also try to expand a constructor. */
6847 expression_rank (e
);
6848 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6849 gfc_expand_constructor (e
, false);
6852 /* This provides the opportunity for the length of constructors with
6853 character valued function elements to propagate the string length
6854 to the expression. */
6855 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6857 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6858 here rather then add a duplicate test for it above. */
6859 gfc_expand_constructor (e
, false);
6860 t
= gfc_resolve_character_array_constructor (e
);
6865 case EXPR_STRUCTURE
:
6866 t
= resolve_ref (e
);
6870 t
= resolve_structure_cons (e
, 0);
6874 t
= gfc_simplify_expr (e
, 0);
6878 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6881 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6884 inquiry_argument
= inquiry_save
;
6885 actual_arg
= actual_arg_save
;
6886 first_actual_arg
= first_actual_arg_save
;
6892 /* Resolve an expression from an iterator. They must be scalar and have
6893 INTEGER or (optionally) REAL type. */
6896 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6897 const char *name_msgid
)
6899 if (!gfc_resolve_expr (expr
))
6902 if (expr
->rank
!= 0)
6904 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6908 if (expr
->ts
.type
!= BT_INTEGER
)
6910 if (expr
->ts
.type
== BT_REAL
)
6913 return gfc_notify_std (GFC_STD_F95_DEL
,
6914 "%s at %L must be integer",
6915 _(name_msgid
), &expr
->where
);
6918 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6925 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6933 /* Resolve the expressions in an iterator structure. If REAL_OK is
6934 false allow only INTEGER type iterators, otherwise allow REAL types.
6935 Set own_scope to true for ac-implied-do and data-implied-do as those
6936 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6939 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6941 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6944 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6945 _("iterator variable")))
6948 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6949 "Start expression in DO loop"))
6952 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6953 "End expression in DO loop"))
6956 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6957 "Step expression in DO loop"))
6960 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6962 if ((iter
->step
->ts
.type
== BT_INTEGER
6963 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6964 || (iter
->step
->ts
.type
== BT_REAL
6965 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6967 gfc_error ("Step expression in DO loop at %L cannot be zero",
6968 &iter
->step
->where
);
6973 /* Convert start, end, and step to the same type as var. */
6974 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6975 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6976 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6978 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6979 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6980 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6982 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6983 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6984 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6986 if (iter
->start
->expr_type
== EXPR_CONSTANT
6987 && iter
->end
->expr_type
== EXPR_CONSTANT
6988 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6991 if (iter
->start
->ts
.type
== BT_INTEGER
)
6993 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6994 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6998 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6999 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7001 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7002 gfc_warning (OPT_Wzerotrip
,
7003 "DO loop at %L will be executed zero times",
7004 &iter
->step
->where
);
7007 if (iter
->end
->expr_type
== EXPR_CONSTANT
7008 && iter
->end
->ts
.type
== BT_INTEGER
7009 && iter
->step
->expr_type
== EXPR_CONSTANT
7010 && iter
->step
->ts
.type
== BT_INTEGER
7011 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7012 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7014 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7015 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7017 if (is_step_positive
7018 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7019 gfc_warning (OPT_Wundefined_do_loop
,
7020 "DO loop at %L is undefined as it overflows",
7021 &iter
->step
->where
);
7022 else if (!is_step_positive
7023 && mpz_cmp (iter
->end
->value
.integer
,
7024 gfc_integer_kinds
[k
].min_int
) == 0)
7025 gfc_warning (OPT_Wundefined_do_loop
,
7026 "DO loop at %L is undefined as it underflows",
7027 &iter
->step
->where
);
7034 /* Traversal function for find_forall_index. f == 2 signals that
7035 that variable itself is not to be checked - only the references. */
7038 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7040 if (expr
->expr_type
!= EXPR_VARIABLE
)
7043 /* A scalar assignment */
7044 if (!expr
->ref
|| *f
== 1)
7046 if (expr
->symtree
->n
.sym
== sym
)
7058 /* Check whether the FORALL index appears in the expression or not.
7059 Returns true if SYM is found in EXPR. */
7062 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7064 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7071 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7072 to be a scalar INTEGER variable. The subscripts and stride are scalar
7073 INTEGERs, and if stride is a constant it must be nonzero.
7074 Furthermore "A subscript or stride in a forall-triplet-spec shall
7075 not contain a reference to any index-name in the
7076 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7079 resolve_forall_iterators (gfc_forall_iterator
*it
)
7081 gfc_forall_iterator
*iter
, *iter2
;
7083 for (iter
= it
; iter
; iter
= iter
->next
)
7085 if (gfc_resolve_expr (iter
->var
)
7086 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7087 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7090 if (gfc_resolve_expr (iter
->start
)
7091 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7092 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7093 &iter
->start
->where
);
7094 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7095 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7097 if (gfc_resolve_expr (iter
->end
)
7098 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7099 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7101 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7102 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7104 if (gfc_resolve_expr (iter
->stride
))
7106 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7107 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7108 &iter
->stride
->where
, "INTEGER");
7110 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7111 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7112 gfc_error ("FORALL stride expression at %L cannot be zero",
7113 &iter
->stride
->where
);
7115 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7116 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7119 for (iter
= it
; iter
; iter
= iter
->next
)
7120 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7122 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7123 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7124 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7125 gfc_error ("FORALL index %qs may not appear in triplet "
7126 "specification at %L", iter
->var
->symtree
->name
,
7127 &iter2
->start
->where
);
7132 /* Given a pointer to a symbol that is a derived type, see if it's
7133 inaccessible, i.e. if it's defined in another module and the components are
7134 PRIVATE. The search is recursive if necessary. Returns zero if no
7135 inaccessible components are found, nonzero otherwise. */
7138 derived_inaccessible (gfc_symbol
*sym
)
7142 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7145 for (c
= sym
->components
; c
; c
= c
->next
)
7147 /* Prevent an infinite loop through this function. */
7148 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7149 && sym
== c
->ts
.u
.derived
)
7152 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7160 /* Resolve the argument of a deallocate expression. The expression must be
7161 a pointer or a full array. */
7164 resolve_deallocate_expr (gfc_expr
*e
)
7166 symbol_attribute attr
;
7167 int allocatable
, pointer
;
7173 if (!gfc_resolve_expr (e
))
7176 if (e
->expr_type
!= EXPR_VARIABLE
)
7179 sym
= e
->symtree
->n
.sym
;
7180 unlimited
= UNLIMITED_POLY(sym
);
7182 if (sym
->ts
.type
== BT_CLASS
)
7184 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7185 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7189 allocatable
= sym
->attr
.allocatable
;
7190 pointer
= sym
->attr
.pointer
;
7192 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7197 if (ref
->u
.ar
.type
!= AR_FULL
7198 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7199 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7204 c
= ref
->u
.c
.component
;
7205 if (c
->ts
.type
== BT_CLASS
)
7207 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7208 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7212 allocatable
= c
->attr
.allocatable
;
7213 pointer
= c
->attr
.pointer
;
7223 attr
= gfc_expr_attr (e
);
7225 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7228 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7234 if (gfc_is_coindexed (e
))
7236 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7241 && !gfc_check_vardef_context (e
, true, true, false,
7242 _("DEALLOCATE object")))
7244 if (!gfc_check_vardef_context (e
, false, true, false,
7245 _("DEALLOCATE object")))
7252 /* Returns true if the expression e contains a reference to the symbol sym. */
7254 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7256 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7263 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7265 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7269 /* Given the expression node e for an allocatable/pointer of derived type to be
7270 allocated, get the expression node to be initialized afterwards (needed for
7271 derived types with default initializers, and derived types with allocatable
7272 components that need nullification.) */
7275 gfc_expr_to_initialize (gfc_expr
*e
)
7281 result
= gfc_copy_expr (e
);
7283 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7284 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7285 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7287 ref
->u
.ar
.type
= AR_FULL
;
7289 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7290 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7295 gfc_free_shape (&result
->shape
, result
->rank
);
7297 /* Recalculate rank, shape, etc. */
7298 gfc_resolve_expr (result
);
7303 /* If the last ref of an expression is an array ref, return a copy of the
7304 expression with that one removed. Otherwise, a copy of the original
7305 expression. This is used for allocate-expressions and pointer assignment
7306 LHS, where there may be an array specification that needs to be stripped
7307 off when using gfc_check_vardef_context. */
7310 remove_last_array_ref (gfc_expr
* e
)
7315 e2
= gfc_copy_expr (e
);
7316 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7317 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7319 gfc_free_ref_list (*r
);
7328 /* Used in resolve_allocate_expr to check that a allocation-object and
7329 a source-expr are conformable. This does not catch all possible
7330 cases; in particular a runtime checking is needed. */
7333 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7336 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7338 /* First compare rank. */
7339 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7340 || (!tail
&& e1
->rank
!= e2
->rank
))
7342 gfc_error ("Source-expr at %L must be scalar or have the "
7343 "same rank as the allocate-object at %L",
7344 &e1
->where
, &e2
->where
);
7355 for (i
= 0; i
< e1
->rank
; i
++)
7357 if (tail
->u
.ar
.start
[i
] == NULL
)
7360 if (tail
->u
.ar
.end
[i
])
7362 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7363 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7364 mpz_add_ui (s
, s
, 1);
7368 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7371 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7373 gfc_error ("Source-expr at %L and allocate-object at %L must "
7374 "have the same shape", &e1
->where
, &e2
->where
);
7387 /* Resolve the expression in an ALLOCATE statement, doing the additional
7388 checks to see whether the expression is OK or not. The expression must
7389 have a trailing array reference that gives the size of the array. */
7392 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7394 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7398 symbol_attribute attr
;
7399 gfc_ref
*ref
, *ref2
;
7402 gfc_symbol
*sym
= NULL
;
7407 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7408 checking of coarrays. */
7409 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7410 if (ref
->next
== NULL
)
7413 if (ref
&& ref
->type
== REF_ARRAY
)
7414 ref
->u
.ar
.in_allocate
= true;
7416 if (!gfc_resolve_expr (e
))
7419 /* Make sure the expression is allocatable or a pointer. If it is
7420 pointer, the next-to-last reference must be a pointer. */
7424 sym
= e
->symtree
->n
.sym
;
7426 /* Check whether ultimate component is abstract and CLASS. */
7429 /* Is the allocate-object unlimited polymorphic? */
7430 unlimited
= UNLIMITED_POLY(e
);
7432 if (e
->expr_type
!= EXPR_VARIABLE
)
7435 attr
= gfc_expr_attr (e
);
7436 pointer
= attr
.pointer
;
7437 dimension
= attr
.dimension
;
7438 codimension
= attr
.codimension
;
7442 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7444 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7445 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7446 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7447 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7448 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7452 allocatable
= sym
->attr
.allocatable
;
7453 pointer
= sym
->attr
.pointer
;
7454 dimension
= sym
->attr
.dimension
;
7455 codimension
= sym
->attr
.codimension
;
7460 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7465 if (ref
->u
.ar
.codimen
> 0)
7468 for (n
= ref
->u
.ar
.dimen
;
7469 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7470 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7477 if (ref
->next
!= NULL
)
7485 gfc_error ("Coindexed allocatable object at %L",
7490 c
= ref
->u
.c
.component
;
7491 if (c
->ts
.type
== BT_CLASS
)
7493 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7494 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7495 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7496 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7497 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7501 allocatable
= c
->attr
.allocatable
;
7502 pointer
= c
->attr
.pointer
;
7503 dimension
= c
->attr
.dimension
;
7504 codimension
= c
->attr
.codimension
;
7505 is_abstract
= c
->attr
.abstract
;
7517 /* Check for F08:C628. */
7518 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7520 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7525 /* Some checks for the SOURCE tag. */
7528 /* Check F03:C631. */
7529 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7531 gfc_error ("Type of entity at %L is type incompatible with "
7532 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7536 /* Check F03:C632 and restriction following Note 6.18. */
7537 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7540 /* Check F03:C633. */
7541 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7543 gfc_error ("The allocate-object at %L and the source-expr at %L "
7544 "shall have the same kind type parameter",
7545 &e
->where
, &code
->expr3
->where
);
7549 /* Check F2008, C642. */
7550 if (code
->expr3
->ts
.type
== BT_DERIVED
7551 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7552 || (code
->expr3
->ts
.u
.derived
->from_intmod
7553 == INTMOD_ISO_FORTRAN_ENV
7554 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7555 == ISOFORTRAN_LOCK_TYPE
)))
7557 gfc_error ("The source-expr at %L shall neither be of type "
7558 "LOCK_TYPE nor have a LOCK_TYPE component if "
7559 "allocate-object at %L is a coarray",
7560 &code
->expr3
->where
, &e
->where
);
7564 /* Check TS18508, C702/C703. */
7565 if (code
->expr3
->ts
.type
== BT_DERIVED
7566 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7567 || (code
->expr3
->ts
.u
.derived
->from_intmod
7568 == INTMOD_ISO_FORTRAN_ENV
7569 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7570 == ISOFORTRAN_EVENT_TYPE
)))
7572 gfc_error ("The source-expr at %L shall neither be of type "
7573 "EVENT_TYPE nor have a EVENT_TYPE component if "
7574 "allocate-object at %L is a coarray",
7575 &code
->expr3
->where
, &e
->where
);
7580 /* Check F08:C629. */
7581 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7584 gcc_assert (e
->ts
.type
== BT_CLASS
);
7585 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7586 "type-spec or source-expr", sym
->name
, &e
->where
);
7590 /* Check F08:C632. */
7591 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7592 && !UNLIMITED_POLY (e
))
7596 if (!e
->ts
.u
.cl
->length
)
7599 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7600 code
->ext
.alloc
.ts
.u
.cl
->length
);
7601 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7603 gfc_error ("Allocating %s at %L with type-spec requires the same "
7604 "character-length parameter as in the declaration",
7605 sym
->name
, &e
->where
);
7610 /* In the variable definition context checks, gfc_expr_attr is used
7611 on the expression. This is fooled by the array specification
7612 present in e, thus we have to eliminate that one temporarily. */
7613 e2
= remove_last_array_ref (e
);
7616 t
= gfc_check_vardef_context (e2
, true, true, false,
7617 _("ALLOCATE object"));
7619 t
= gfc_check_vardef_context (e2
, false, true, false,
7620 _("ALLOCATE object"));
7625 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7626 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7628 /* For class arrays, the initialization with SOURCE is done
7629 using _copy and trans_call. It is convenient to exploit that
7630 when the allocated type is different from the declared type but
7631 no SOURCE exists by setting expr3. */
7632 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7634 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7635 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7636 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7638 /* We have to zero initialize the integer variable. */
7639 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7642 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7644 /* Make sure the vtab symbol is present when
7645 the module variables are generated. */
7646 gfc_typespec ts
= e
->ts
;
7648 ts
= code
->expr3
->ts
;
7649 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7650 ts
= code
->ext
.alloc
.ts
;
7652 /* Finding the vtab also publishes the type's symbol. Therefore this
7653 statement is necessary. */
7654 gfc_find_derived_vtab (ts
.u
.derived
);
7656 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7658 /* Again, make sure the vtab symbol is present when
7659 the module variables are generated. */
7660 gfc_typespec
*ts
= NULL
;
7662 ts
= &code
->expr3
->ts
;
7664 ts
= &code
->ext
.alloc
.ts
;
7668 /* Finding the vtab also publishes the type's symbol. Therefore this
7669 statement is necessary. */
7673 if (dimension
== 0 && codimension
== 0)
7676 /* Make sure the last reference node is an array specification. */
7678 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7679 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7684 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7685 "in ALLOCATE statement at %L", &e
->where
))
7687 if (code
->expr3
->rank
!= 0)
7688 *array_alloc_wo_spec
= true;
7691 gfc_error ("Array specification or array-valued SOURCE= "
7692 "expression required in ALLOCATE statement at %L",
7699 gfc_error ("Array specification required in ALLOCATE statement "
7700 "at %L", &e
->where
);
7705 /* Make sure that the array section reference makes sense in the
7706 context of an ALLOCATE specification. */
7711 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7712 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7714 gfc_error ("Coarray specification required in ALLOCATE statement "
7715 "at %L", &e
->where
);
7719 for (i
= 0; i
< ar
->dimen
; i
++)
7721 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7724 switch (ar
->dimen_type
[i
])
7730 if (ar
->start
[i
] != NULL
7731 && ar
->end
[i
] != NULL
7732 && ar
->stride
[i
] == NULL
)
7740 case DIMEN_THIS_IMAGE
:
7741 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7747 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7749 sym
= a
->expr
->symtree
->n
.sym
;
7751 /* TODO - check derived type components. */
7752 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7755 if ((ar
->start
[i
] != NULL
7756 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7757 || (ar
->end
[i
] != NULL
7758 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7760 gfc_error ("%qs must not appear in the array specification at "
7761 "%L in the same ALLOCATE statement where it is "
7762 "itself allocated", sym
->name
, &ar
->where
);
7768 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7770 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7771 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7773 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7775 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7776 "statement at %L", &e
->where
);
7782 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7783 && ar
->stride
[i
] == NULL
)
7786 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7800 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7802 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7803 gfc_alloc
*a
, *p
, *q
;
7806 errmsg
= code
->expr2
;
7808 /* Check the stat variable. */
7811 gfc_check_vardef_context (stat
, false, false, false,
7812 _("STAT variable"));
7814 if ((stat
->ts
.type
!= BT_INTEGER
7815 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7816 || stat
->ref
->type
== REF_COMPONENT
)))
7818 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7819 "variable", &stat
->where
);
7821 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7822 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7824 gfc_ref
*ref1
, *ref2
;
7827 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7828 ref1
= ref1
->next
, ref2
= ref2
->next
)
7830 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7832 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7841 gfc_error ("Stat-variable at %L shall not be %sd within "
7842 "the same %s statement", &stat
->where
, fcn
, fcn
);
7848 /* Check the errmsg variable. */
7852 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7855 gfc_check_vardef_context (errmsg
, false, false, false,
7856 _("ERRMSG variable"));
7858 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7859 F18:R930 errmsg-variable is scalar-default-char-variable
7860 F18:R906 default-char-variable is variable
7861 F18:C906 default-char-variable shall be default character. */
7862 if ((errmsg
->ts
.type
!= BT_CHARACTER
7864 && (errmsg
->ref
->type
== REF_ARRAY
7865 || errmsg
->ref
->type
== REF_COMPONENT
)))
7867 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7868 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7869 "variable", &errmsg
->where
);
7871 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7872 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7874 gfc_ref
*ref1
, *ref2
;
7877 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7878 ref1
= ref1
->next
, ref2
= ref2
->next
)
7880 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7882 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7891 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7892 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7898 /* Check that an allocate-object appears only once in the statement. */
7900 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7903 for (q
= p
->next
; q
; q
= q
->next
)
7906 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7908 /* This is a potential collision. */
7909 gfc_ref
*pr
= pe
->ref
;
7910 gfc_ref
*qr
= qe
->ref
;
7912 /* Follow the references until
7913 a) They start to differ, in which case there is no error;
7914 you can deallocate a%b and a%c in a single statement
7915 b) Both of them stop, which is an error
7916 c) One of them stops, which is also an error. */
7919 if (pr
== NULL
&& qr
== NULL
)
7921 gfc_error ("Allocate-object at %L also appears at %L",
7922 &pe
->where
, &qe
->where
);
7925 else if (pr
!= NULL
&& qr
== NULL
)
7927 gfc_error ("Allocate-object at %L is subobject of"
7928 " object at %L", &pe
->where
, &qe
->where
);
7931 else if (pr
== NULL
&& qr
!= NULL
)
7933 gfc_error ("Allocate-object at %L is subobject of"
7934 " object at %L", &qe
->where
, &pe
->where
);
7937 /* Here, pr != NULL && qr != NULL */
7938 gcc_assert(pr
->type
== qr
->type
);
7939 if (pr
->type
== REF_ARRAY
)
7941 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7943 gcc_assert (qr
->type
== REF_ARRAY
);
7945 if (pr
->next
&& qr
->next
)
7948 gfc_array_ref
*par
= &(pr
->u
.ar
);
7949 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7951 for (i
=0; i
<par
->dimen
; i
++)
7953 if ((par
->start
[i
] != NULL
7954 || qar
->start
[i
] != NULL
)
7955 && gfc_dep_compare_expr (par
->start
[i
],
7956 qar
->start
[i
]) != 0)
7963 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7976 if (strcmp (fcn
, "ALLOCATE") == 0)
7978 bool arr_alloc_wo_spec
= false;
7980 /* Resolving the expr3 in the loop over all objects to allocate would
7981 execute loop invariant code for each loop item. Therefore do it just
7983 if (code
->expr3
&& code
->expr3
->mold
7984 && code
->expr3
->ts
.type
== BT_DERIVED
)
7986 /* Default initialization via MOLD (non-polymorphic). */
7987 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7990 gfc_resolve_expr (rhs
);
7991 gfc_free_expr (code
->expr3
);
7995 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7996 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7998 if (arr_alloc_wo_spec
&& code
->expr3
)
8000 /* Mark the allocate to have to take the array specification
8002 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8007 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8008 resolve_deallocate_expr (a
->expr
);
8013 /************ SELECT CASE resolution subroutines ************/
8015 /* Callback function for our mergesort variant. Determines interval
8016 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8017 op1 > op2. Assumes we're not dealing with the default case.
8018 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8019 There are nine situations to check. */
8022 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8026 if (op1
->low
== NULL
) /* op1 = (:L) */
8028 /* op2 = (:N), so overlap. */
8030 /* op2 = (M:) or (M:N), L < M */
8031 if (op2
->low
!= NULL
8032 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8035 else if (op1
->high
== NULL
) /* op1 = (K:) */
8037 /* op2 = (M:), so overlap. */
8039 /* op2 = (:N) or (M:N), K > N */
8040 if (op2
->high
!= NULL
8041 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8044 else /* op1 = (K:L) */
8046 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8047 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8049 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8050 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8052 else /* op2 = (M:N) */
8056 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8059 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8068 /* Merge-sort a double linked case list, detecting overlap in the
8069 process. LIST is the head of the double linked case list before it
8070 is sorted. Returns the head of the sorted list if we don't see any
8071 overlap, or NULL otherwise. */
8074 check_case_overlap (gfc_case
*list
)
8076 gfc_case
*p
, *q
, *e
, *tail
;
8077 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8079 /* If the passed list was empty, return immediately. */
8086 /* Loop unconditionally. The only exit from this loop is a return
8087 statement, when we've finished sorting the case list. */
8094 /* Count the number of merges we do in this pass. */
8097 /* Loop while there exists a merge to be done. */
8102 /* Count this merge. */
8105 /* Cut the list in two pieces by stepping INSIZE places
8106 forward in the list, starting from P. */
8109 for (i
= 0; i
< insize
; i
++)
8118 /* Now we have two lists. Merge them! */
8119 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8121 /* See from which the next case to merge comes from. */
8124 /* P is empty so the next case must come from Q. */
8129 else if (qsize
== 0 || q
== NULL
)
8138 cmp
= compare_cases (p
, q
);
8141 /* The whole case range for P is less than the
8149 /* The whole case range for Q is greater than
8150 the case range for P. */
8157 /* The cases overlap, or they are the same
8158 element in the list. Either way, we must
8159 issue an error and get the next case from P. */
8160 /* FIXME: Sort P and Q by line number. */
8161 gfc_error ("CASE label at %L overlaps with CASE "
8162 "label at %L", &p
->where
, &q
->where
);
8170 /* Add the next element to the merged list. */
8179 /* P has now stepped INSIZE places along, and so has Q. So
8180 they're the same. */
8185 /* If we have done only one merge or none at all, we've
8186 finished sorting the cases. */
8195 /* Otherwise repeat, merging lists twice the size. */
8201 /* Check to see if an expression is suitable for use in a CASE statement.
8202 Makes sure that all case expressions are scalar constants of the same
8203 type. Return false if anything is wrong. */
8206 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8208 if (e
== NULL
) return true;
8210 if (e
->ts
.type
!= case_expr
->ts
.type
)
8212 gfc_error ("Expression in CASE statement at %L must be of type %s",
8213 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8217 /* C805 (R808) For a given case-construct, each case-value shall be of
8218 the same type as case-expr. For character type, length differences
8219 are allowed, but the kind type parameters shall be the same. */
8221 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8223 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8224 &e
->where
, case_expr
->ts
.kind
);
8228 /* Convert the case value kind to that of case expression kind,
8231 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8232 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8236 gfc_error ("Expression in CASE statement at %L must be scalar",
8245 /* Given a completely parsed select statement, we:
8247 - Validate all expressions and code within the SELECT.
8248 - Make sure that the selection expression is not of the wrong type.
8249 - Make sure that no case ranges overlap.
8250 - Eliminate unreachable cases and unreachable code resulting from
8251 removing case labels.
8253 The standard does allow unreachable cases, e.g. CASE (5:3). But
8254 they are a hassle for code generation, and to prevent that, we just
8255 cut them out here. This is not necessary for overlapping cases
8256 because they are illegal and we never even try to generate code.
8258 We have the additional caveat that a SELECT construct could have
8259 been a computed GOTO in the source code. Fortunately we can fairly
8260 easily work around that here: The case_expr for a "real" SELECT CASE
8261 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8262 we have to do is make sure that the case_expr is a scalar integer
8266 resolve_select (gfc_code
*code
, bool select_type
)
8269 gfc_expr
*case_expr
;
8270 gfc_case
*cp
, *default_case
, *tail
, *head
;
8271 int seen_unreachable
;
8277 if (code
->expr1
== NULL
)
8279 /* This was actually a computed GOTO statement. */
8280 case_expr
= code
->expr2
;
8281 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8282 gfc_error ("Selection expression in computed GOTO statement "
8283 "at %L must be a scalar integer expression",
8286 /* Further checking is not necessary because this SELECT was built
8287 by the compiler, so it should always be OK. Just move the
8288 case_expr from expr2 to expr so that we can handle computed
8289 GOTOs as normal SELECTs from here on. */
8290 code
->expr1
= code
->expr2
;
8295 case_expr
= code
->expr1
;
8296 type
= case_expr
->ts
.type
;
8299 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8301 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8302 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8304 /* Punt. Going on here just produce more garbage error messages. */
8309 if (!select_type
&& case_expr
->rank
!= 0)
8311 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8312 "expression", &case_expr
->where
);
8318 /* Raise a warning if an INTEGER case value exceeds the range of
8319 the case-expr. Later, all expressions will be promoted to the
8320 largest kind of all case-labels. */
8322 if (type
== BT_INTEGER
)
8323 for (body
= code
->block
; body
; body
= body
->block
)
8324 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8327 && gfc_check_integer_range (cp
->low
->value
.integer
,
8328 case_expr
->ts
.kind
) != ARITH_OK
)
8329 gfc_warning (0, "Expression in CASE statement at %L is "
8330 "not in the range of %s", &cp
->low
->where
,
8331 gfc_typename (&case_expr
->ts
));
8334 && cp
->low
!= cp
->high
8335 && gfc_check_integer_range (cp
->high
->value
.integer
,
8336 case_expr
->ts
.kind
) != ARITH_OK
)
8337 gfc_warning (0, "Expression in CASE statement at %L is "
8338 "not in the range of %s", &cp
->high
->where
,
8339 gfc_typename (&case_expr
->ts
));
8342 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8343 of the SELECT CASE expression and its CASE values. Walk the lists
8344 of case values, and if we find a mismatch, promote case_expr to
8345 the appropriate kind. */
8347 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8349 for (body
= code
->block
; body
; body
= body
->block
)
8351 /* Walk the case label list. */
8352 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8354 /* Intercept the DEFAULT case. It does not have a kind. */
8355 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8358 /* Unreachable case ranges are discarded, so ignore. */
8359 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8360 && cp
->low
!= cp
->high
8361 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8365 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8366 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8368 if (cp
->high
!= NULL
8369 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8370 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8375 /* Assume there is no DEFAULT case. */
8376 default_case
= NULL
;
8381 for (body
= code
->block
; body
; body
= body
->block
)
8383 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8385 seen_unreachable
= 0;
8387 /* Walk the case label list, making sure that all case labels
8389 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8391 /* Count the number of cases in the whole construct. */
8394 /* Intercept the DEFAULT case. */
8395 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8397 if (default_case
!= NULL
)
8399 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8400 "by a second DEFAULT CASE at %L",
8401 &default_case
->where
, &cp
->where
);
8412 /* Deal with single value cases and case ranges. Errors are
8413 issued from the validation function. */
8414 if (!validate_case_label_expr (cp
->low
, case_expr
)
8415 || !validate_case_label_expr (cp
->high
, case_expr
))
8421 if (type
== BT_LOGICAL
8422 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8423 || cp
->low
!= cp
->high
))
8425 gfc_error ("Logical range in CASE statement at %L is not "
8426 "allowed", &cp
->low
->where
);
8431 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8434 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8435 if (value
& seen_logical
)
8437 gfc_error ("Constant logical value in CASE statement "
8438 "is repeated at %L",
8443 seen_logical
|= value
;
8446 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8447 && cp
->low
!= cp
->high
8448 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8450 if (warn_surprising
)
8451 gfc_warning (OPT_Wsurprising
,
8452 "Range specification at %L can never be matched",
8455 cp
->unreachable
= 1;
8456 seen_unreachable
= 1;
8460 /* If the case range can be matched, it can also overlap with
8461 other cases. To make sure it does not, we put it in a
8462 double linked list here. We sort that with a merge sort
8463 later on to detect any overlapping cases. */
8467 head
->right
= head
->left
= NULL
;
8472 tail
->right
->left
= tail
;
8479 /* It there was a failure in the previous case label, give up
8480 for this case label list. Continue with the next block. */
8484 /* See if any case labels that are unreachable have been seen.
8485 If so, we eliminate them. This is a bit of a kludge because
8486 the case lists for a single case statement (label) is a
8487 single forward linked lists. */
8488 if (seen_unreachable
)
8490 /* Advance until the first case in the list is reachable. */
8491 while (body
->ext
.block
.case_list
!= NULL
8492 && body
->ext
.block
.case_list
->unreachable
)
8494 gfc_case
*n
= body
->ext
.block
.case_list
;
8495 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8497 gfc_free_case_list (n
);
8500 /* Strip all other unreachable cases. */
8501 if (body
->ext
.block
.case_list
)
8503 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8505 if (cp
->next
->unreachable
)
8507 gfc_case
*n
= cp
->next
;
8508 cp
->next
= cp
->next
->next
;
8510 gfc_free_case_list (n
);
8517 /* See if there were overlapping cases. If the check returns NULL,
8518 there was overlap. In that case we don't do anything. If head
8519 is non-NULL, we prepend the DEFAULT case. The sorted list can
8520 then used during code generation for SELECT CASE constructs with
8521 a case expression of a CHARACTER type. */
8524 head
= check_case_overlap (head
);
8526 /* Prepend the default_case if it is there. */
8527 if (head
!= NULL
&& default_case
)
8529 default_case
->left
= NULL
;
8530 default_case
->right
= head
;
8531 head
->left
= default_case
;
8535 /* Eliminate dead blocks that may be the result if we've seen
8536 unreachable case labels for a block. */
8537 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8539 if (body
->block
->ext
.block
.case_list
== NULL
)
8541 /* Cut the unreachable block from the code chain. */
8542 gfc_code
*c
= body
->block
;
8543 body
->block
= c
->block
;
8545 /* Kill the dead block, but not the blocks below it. */
8547 gfc_free_statements (c
);
8551 /* More than two cases is legal but insane for logical selects.
8552 Issue a warning for it. */
8553 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8554 gfc_warning (OPT_Wsurprising
,
8555 "Logical SELECT CASE block at %L has more that two cases",
8560 /* Check if a derived type is extensible. */
8563 gfc_type_is_extensible (gfc_symbol
*sym
)
8565 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8566 || (sym
->attr
.is_class
8567 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8572 resolve_types (gfc_namespace
*ns
);
8574 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8575 correct as well as possibly the array-spec. */
8578 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8582 gcc_assert (sym
->assoc
);
8583 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8585 /* If this is for SELECT TYPE, the target may not yet be set. In that
8586 case, return. Resolution will be called later manually again when
8588 target
= sym
->assoc
->target
;
8591 gcc_assert (!sym
->assoc
->dangling
);
8593 if (resolve_target
&& !gfc_resolve_expr (target
))
8596 /* For variable targets, we get some attributes from the target. */
8597 if (target
->expr_type
== EXPR_VARIABLE
)
8601 gcc_assert (target
->symtree
);
8602 tsym
= target
->symtree
->n
.sym
;
8604 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8605 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8607 sym
->attr
.target
= tsym
->attr
.target
8608 || gfc_expr_attr (target
).pointer
;
8609 if (is_subref_array (target
))
8610 sym
->attr
.subref_array_pointer
= 1;
8613 if (target
->expr_type
== EXPR_NULL
)
8615 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8618 else if (target
->ts
.type
== BT_UNKNOWN
)
8620 gfc_error ("Selector at %L has no type", &target
->where
);
8624 /* Get type if this was not already set. Note that it can be
8625 some other type than the target in case this is a SELECT TYPE
8626 selector! So we must not update when the type is already there. */
8627 if (sym
->ts
.type
== BT_UNKNOWN
)
8628 sym
->ts
= target
->ts
;
8630 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8632 /* See if this is a valid association-to-variable. */
8633 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8634 && !gfc_has_vector_subscript (target
));
8636 /* Finally resolve if this is an array or not. */
8637 if (sym
->attr
.dimension
&& target
->rank
== 0)
8639 /* primary.c makes the assumption that a reference to an associate
8640 name followed by a left parenthesis is an array reference. */
8641 if (sym
->ts
.type
!= BT_CHARACTER
)
8642 gfc_error ("Associate-name %qs at %L is used as array",
8643 sym
->name
, &sym
->declared_at
);
8644 sym
->attr
.dimension
= 0;
8649 /* We cannot deal with class selectors that need temporaries. */
8650 if (target
->ts
.type
== BT_CLASS
8651 && gfc_ref_needs_temporary_p (target
->ref
))
8653 gfc_error ("CLASS selector at %L needs a temporary which is not "
8654 "yet implemented", &target
->where
);
8658 if (target
->ts
.type
== BT_CLASS
)
8659 gfc_fix_class_refs (target
);
8661 if (target
->rank
!= 0)
8664 /* The rank may be incorrectly guessed at parsing, therefore make sure
8665 it is corrected now. */
8666 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8669 sym
->as
= gfc_get_array_spec ();
8671 as
->rank
= target
->rank
;
8672 as
->type
= AS_DEFERRED
;
8673 as
->corank
= gfc_get_corank (target
);
8674 sym
->attr
.dimension
= 1;
8675 if (as
->corank
!= 0)
8676 sym
->attr
.codimension
= 1;
8681 /* target's rank is 0, but the type of the sym is still array valued,
8682 which has to be corrected. */
8683 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8686 symbol_attribute attr
;
8687 /* The associated variable's type is still the array type
8688 correct this now. */
8689 gfc_typespec
*ts
= &target
->ts
;
8692 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8697 ts
= &ref
->u
.c
.component
->ts
;
8700 if (ts
->type
== BT_CLASS
)
8701 ts
= &ts
->u
.derived
->components
->ts
;
8707 /* Create a scalar instance of the current class type. Because the
8708 rank of a class array goes into its name, the type has to be
8709 rebuild. The alternative of (re-)setting just the attributes
8710 and as in the current type, destroys the type also in other
8714 sym
->ts
.type
= BT_CLASS
;
8715 attr
= CLASS_DATA (sym
)->attr
;
8717 attr
.associate_var
= 1;
8718 attr
.dimension
= attr
.codimension
= 0;
8719 attr
.class_pointer
= 1;
8720 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8722 /* Make sure the _vptr is set. */
8723 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8724 if (c
->ts
.u
.derived
== NULL
)
8725 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8726 CLASS_DATA (sym
)->attr
.pointer
= 1;
8727 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8728 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8729 gfc_commit_symbol (sym
->ts
.u
.derived
);
8730 /* _vptr now has the _vtab in it, change it to the _vtype. */
8731 if (c
->ts
.u
.derived
->attr
.vtab
)
8732 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8733 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8734 resolve_types (c
->ts
.u
.derived
->ns
);
8738 /* Mark this as an associate variable. */
8739 sym
->attr
.associate_var
= 1;
8741 /* Fix up the type-spec for CHARACTER types. */
8742 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8745 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8747 if (!sym
->ts
.u
.cl
->length
8748 && !sym
->ts
.deferred
8749 && target
->expr_type
== EXPR_CONSTANT
)
8751 sym
->ts
.u
.cl
->length
=
8752 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8753 target
->value
.character
.length
);
8755 else if ((!sym
->ts
.u
.cl
->length
8756 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8757 && target
->expr_type
!= EXPR_VARIABLE
)
8759 sym
->ts
.u
.cl
= gfc_get_charlen();
8760 sym
->ts
.deferred
= 1;
8762 /* This is reset in trans-stmt.c after the assignment
8763 of the target expression to the associate name. */
8764 sym
->attr
.allocatable
= 1;
8768 /* If the target is a good class object, so is the associate variable. */
8769 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8770 sym
->attr
.class_ok
= 1;
8774 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8775 array reference, where necessary. The symbols are artificial and so
8776 the dimension attribute and arrayspec can also be set. In addition,
8777 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8778 This is corrected here as well.*/
8781 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8782 int rank
, gfc_ref
*ref
)
8784 gfc_ref
*nref
= (*expr1
)->ref
;
8785 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8786 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8787 (*expr1
)->rank
= rank
;
8788 if (sym1
->ts
.type
== BT_CLASS
)
8790 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8791 (*expr1
)->ts
= sym1
->ts
;
8793 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8794 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8795 CLASS_DATA (sym1
)->as
8796 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8800 sym1
->attr
.dimension
= 1;
8801 if (sym1
->as
== NULL
&& sym2
)
8802 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8805 for (; nref
; nref
= nref
->next
)
8806 if (nref
->next
== NULL
)
8809 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8810 nref
->next
= gfc_copy_ref (ref
);
8811 else if (ref
&& !nref
)
8812 (*expr1
)->ref
= gfc_copy_ref (ref
);
8817 build_loc_call (gfc_expr
*sym_expr
)
8820 loc_call
= gfc_get_expr ();
8821 loc_call
->expr_type
= EXPR_FUNCTION
;
8822 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8823 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8824 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8825 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8826 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8827 loc_call
->ts
.type
= BT_INTEGER
;
8828 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8829 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8830 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8831 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8832 loc_call
->where
= sym_expr
->where
;
8836 /* Resolve a SELECT TYPE statement. */
8839 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8841 gfc_symbol
*selector_type
;
8842 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8843 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8846 char name
[GFC_MAX_SYMBOL_LEN
];
8850 gfc_ref
* ref
= NULL
;
8851 gfc_expr
*selector_expr
= NULL
;
8853 ns
= code
->ext
.block
.ns
;
8856 /* Check for F03:C813. */
8857 if (code
->expr1
->ts
.type
!= BT_CLASS
8858 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8860 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8861 "at %L", &code
->loc
);
8865 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8870 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8871 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8872 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8874 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8875 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8877 /* F2008: C803 The selector expression must not be coindexed. */
8878 if (gfc_is_coindexed (code
->expr2
))
8880 gfc_error ("Selector at %L must not be coindexed",
8881 &code
->expr2
->where
);
8888 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8890 if (gfc_is_coindexed (code
->expr1
))
8892 gfc_error ("Selector at %L must not be coindexed",
8893 &code
->expr1
->where
);
8898 /* Loop over TYPE IS / CLASS IS cases. */
8899 for (body
= code
->block
; body
; body
= body
->block
)
8901 c
= body
->ext
.block
.case_list
;
8905 /* Check for repeated cases. */
8906 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8908 gfc_case
*d
= tail
->ext
.block
.case_list
;
8912 if (c
->ts
.type
== d
->ts
.type
8913 && ((c
->ts
.type
== BT_DERIVED
8914 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8915 && !strcmp (c
->ts
.u
.derived
->name
,
8916 d
->ts
.u
.derived
->name
))
8917 || c
->ts
.type
== BT_UNKNOWN
8918 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8919 && c
->ts
.kind
== d
->ts
.kind
)))
8921 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8922 &c
->where
, &d
->where
);
8928 /* Check F03:C815. */
8929 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8930 && !selector_type
->attr
.unlimited_polymorphic
8931 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8933 gfc_error ("Derived type %qs at %L must be extensible",
8934 c
->ts
.u
.derived
->name
, &c
->where
);
8939 /* Check F03:C816. */
8940 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8941 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8942 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8944 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8945 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8946 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8948 gfc_error ("Unexpected intrinsic type %qs at %L",
8949 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8954 /* Check F03:C814. */
8955 if (c
->ts
.type
== BT_CHARACTER
8956 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8958 gfc_error ("The type-spec at %L shall specify that each length "
8959 "type parameter is assumed", &c
->where
);
8964 /* Intercept the DEFAULT case. */
8965 if (c
->ts
.type
== BT_UNKNOWN
)
8967 /* Check F03:C818. */
8970 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8971 "by a second DEFAULT CASE at %L",
8972 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8977 default_case
= body
;
8984 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8985 target if present. If there are any EXIT statements referring to the
8986 SELECT TYPE construct, this is no problem because the gfc_code
8987 reference stays the same and EXIT is equally possible from the BLOCK
8988 it is changed to. */
8989 code
->op
= EXEC_BLOCK
;
8992 gfc_association_list
* assoc
;
8994 assoc
= gfc_get_association_list ();
8995 assoc
->st
= code
->expr1
->symtree
;
8996 assoc
->target
= gfc_copy_expr (code
->expr2
);
8997 assoc
->target
->where
= code
->expr2
->where
;
8998 /* assoc->variable will be set by resolve_assoc_var. */
9000 code
->ext
.block
.assoc
= assoc
;
9001 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9003 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9006 code
->ext
.block
.assoc
= NULL
;
9008 /* Ensure that the selector rank and arrayspec are available to
9009 correct expressions in which they might be missing. */
9010 if (code
->expr2
&& code
->expr2
->rank
)
9012 rank
= code
->expr2
->rank
;
9013 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9014 if (ref
->next
== NULL
)
9016 if (ref
&& ref
->type
== REF_ARRAY
)
9017 ref
= gfc_copy_ref (ref
);
9019 /* Fixup expr1 if necessary. */
9021 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9023 else if (code
->expr1
->rank
)
9025 rank
= code
->expr1
->rank
;
9026 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9027 if (ref
->next
== NULL
)
9029 if (ref
&& ref
->type
== REF_ARRAY
)
9030 ref
= gfc_copy_ref (ref
);
9033 /* Add EXEC_SELECT to switch on type. */
9034 new_st
= gfc_get_code (code
->op
);
9035 new_st
->expr1
= code
->expr1
;
9036 new_st
->expr2
= code
->expr2
;
9037 new_st
->block
= code
->block
;
9038 code
->expr1
= code
->expr2
= NULL
;
9043 ns
->code
->next
= new_st
;
9045 code
->op
= EXEC_SELECT_TYPE
;
9047 /* Use the intrinsic LOC function to generate an integer expression
9048 for the vtable of the selector. Note that the rank of the selector
9049 expression has to be set to zero. */
9050 gfc_add_vptr_component (code
->expr1
);
9051 code
->expr1
->rank
= 0;
9052 code
->expr1
= build_loc_call (code
->expr1
);
9053 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9055 /* Loop over TYPE IS / CLASS IS cases. */
9056 for (body
= code
->block
; body
; body
= body
->block
)
9060 c
= body
->ext
.block
.case_list
;
9062 /* Generate an index integer expression for address of the
9063 TYPE/CLASS vtable and store it in c->low. The hash expression
9064 is stored in c->high and is used to resolve intrinsic cases. */
9065 if (c
->ts
.type
!= BT_UNKNOWN
)
9067 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9069 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9071 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9072 c
->ts
.u
.derived
->hash_value
);
9076 vtab
= gfc_find_vtab (&c
->ts
);
9077 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9078 e
= CLASS_DATA (vtab
)->initializer
;
9079 c
->high
= gfc_copy_expr (e
);
9080 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9083 ts
.kind
= gfc_integer_4_kind
;
9084 ts
.type
= BT_INTEGER
;
9085 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9089 e
= gfc_lval_expr_from_sym (vtab
);
9090 c
->low
= build_loc_call (e
);
9095 /* Associate temporary to selector. This should only be done
9096 when this case is actually true, so build a new ASSOCIATE
9097 that does precisely this here (instead of using the
9100 if (c
->ts
.type
== BT_CLASS
)
9101 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9102 else if (c
->ts
.type
== BT_DERIVED
)
9103 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9104 else if (c
->ts
.type
== BT_CHARACTER
)
9106 HOST_WIDE_INT charlen
= 0;
9107 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9108 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9109 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9110 snprintf (name
, sizeof (name
),
9111 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9112 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9115 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9118 st
= gfc_find_symtree (ns
->sym_root
, name
);
9119 gcc_assert (st
->n
.sym
->assoc
);
9120 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9121 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9122 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9124 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9125 /* Fixup the target expression if necessary. */
9127 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9130 new_st
= gfc_get_code (EXEC_BLOCK
);
9131 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9132 new_st
->ext
.block
.ns
->code
= body
->next
;
9133 body
->next
= new_st
;
9135 /* Chain in the new list only if it is marked as dangling. Otherwise
9136 there is a CASE label overlap and this is already used. Just ignore,
9137 the error is diagnosed elsewhere. */
9138 if (st
->n
.sym
->assoc
->dangling
)
9140 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9141 st
->n
.sym
->assoc
->dangling
= 0;
9144 resolve_assoc_var (st
->n
.sym
, false);
9147 /* Take out CLASS IS cases for separate treatment. */
9149 while (body
&& body
->block
)
9151 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9153 /* Add to class_is list. */
9154 if (class_is
== NULL
)
9156 class_is
= body
->block
;
9161 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9162 tail
->block
= body
->block
;
9165 /* Remove from EXEC_SELECT list. */
9166 body
->block
= body
->block
->block
;
9179 /* Add a default case to hold the CLASS IS cases. */
9180 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9181 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9183 tail
->ext
.block
.case_list
= gfc_get_case ();
9184 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9186 default_case
= tail
;
9189 /* More than one CLASS IS block? */
9190 if (class_is
->block
)
9194 /* Sort CLASS IS blocks by extension level. */
9198 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9201 /* F03:C817 (check for doubles). */
9202 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9203 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9205 gfc_error ("Double CLASS IS block in SELECT TYPE "
9207 &c2
->ext
.block
.case_list
->where
);
9210 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9211 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9214 (*c1
)->block
= c2
->block
;
9224 /* Generate IF chain. */
9225 if_st
= gfc_get_code (EXEC_IF
);
9227 for (body
= class_is
; body
; body
= body
->block
)
9229 new_st
->block
= gfc_get_code (EXEC_IF
);
9230 new_st
= new_st
->block
;
9231 /* Set up IF condition: Call _gfortran_is_extension_of. */
9232 new_st
->expr1
= gfc_get_expr ();
9233 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9234 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9235 new_st
->expr1
->ts
.kind
= 4;
9236 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9237 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9238 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9239 /* Set up arguments. */
9240 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9241 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9242 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9243 new_st
->expr1
->where
= code
->loc
;
9244 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9245 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9246 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9247 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9248 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9249 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9250 new_st
->next
= body
->next
;
9252 if (default_case
->next
)
9254 new_st
->block
= gfc_get_code (EXEC_IF
);
9255 new_st
= new_st
->block
;
9256 new_st
->next
= default_case
->next
;
9259 /* Replace CLASS DEFAULT code by the IF chain. */
9260 default_case
->next
= if_st
;
9263 /* Resolve the internal code. This can not be done earlier because
9264 it requires that the sym->assoc of selectors is set already. */
9265 gfc_current_ns
= ns
;
9266 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9267 gfc_current_ns
= old_ns
;
9274 /* Resolve a transfer statement. This is making sure that:
9275 -- a derived type being transferred has only non-pointer components
9276 -- a derived type being transferred doesn't have private components, unless
9277 it's being transferred from the module where the type was defined
9278 -- we're not trying to transfer a whole assumed size array. */
9281 resolve_transfer (gfc_code
*code
)
9284 gfc_symbol
*sym
, *derived
;
9288 bool formatted
= false;
9289 gfc_dt
*dt
= code
->ext
.dt
;
9290 gfc_symbol
*dtio_sub
= NULL
;
9294 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9295 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9296 exp
= exp
->value
.op
.op1
;
9298 if (exp
&& exp
->expr_type
== EXPR_NULL
9301 gfc_error ("Invalid context for NULL () intrinsic at %L",
9306 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9307 && exp
->expr_type
!= EXPR_FUNCTION
9308 && exp
->expr_type
!= EXPR_STRUCTURE
))
9311 /* If we are reading, the variable will be changed. Note that
9312 code->ext.dt may be NULL if the TRANSFER is related to
9313 an INQUIRE statement -- but in this case, we are not reading, either. */
9314 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9315 && !gfc_check_vardef_context (exp
, false, false, false,
9319 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9321 /* Go to actual component transferred. */
9322 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9323 if (ref
->type
== REF_COMPONENT
)
9324 ts
= &ref
->u
.c
.component
->ts
;
9326 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9327 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9329 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9330 derived
= ts
->u
.derived
;
9332 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9334 /* Determine when to use the formatted DTIO procedure. */
9335 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9338 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9339 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9340 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9342 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9345 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9346 /* Check to see if this is a nested DTIO call, with the
9347 dummy as the io-list object. */
9348 if (sym
&& sym
== dtio_sub
&& sym
->formal
9349 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9350 && exp
->ref
== NULL
)
9352 if (!sym
->attr
.recursive
)
9354 gfc_error ("DTIO %s procedure at %L must be recursive",
9355 sym
->name
, &sym
->declared_at
);
9362 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9364 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9365 "it is processed by a defined input/output procedure",
9370 if (ts
->type
== BT_DERIVED
)
9372 /* Check that transferred derived type doesn't contain POINTER
9373 components unless it is processed by a defined input/output
9375 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9377 gfc_error ("Data transfer element at %L cannot have POINTER "
9378 "components unless it is processed by a defined "
9379 "input/output procedure", &code
->loc
);
9384 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9386 gfc_error ("Data transfer element at %L cannot have "
9387 "procedure pointer components", &code
->loc
);
9391 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9393 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9394 "components unless it is processed by a defined "
9395 "input/output procedure", &code
->loc
);
9399 /* C_PTR and C_FUNPTR have private components which means they can not
9400 be printed. However, if -std=gnu and not -pedantic, allow
9401 the component to be printed to help debugging. */
9402 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9404 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9405 "cannot have PRIVATE components", &code
->loc
))
9408 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9410 gfc_error ("Data transfer element at %L cannot have "
9411 "PRIVATE components unless it is processed by "
9412 "a defined input/output procedure", &code
->loc
);
9417 if (exp
->expr_type
== EXPR_STRUCTURE
)
9420 sym
= exp
->symtree
->n
.sym
;
9422 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9423 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9425 gfc_error ("Data transfer element at %L cannot be a full reference to "
9426 "an assumed-size array", &code
->loc
);
9430 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9431 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9435 /*********** Toplevel code resolution subroutines ***********/
9437 /* Find the set of labels that are reachable from this block. We also
9438 record the last statement in each block. */
9441 find_reachable_labels (gfc_code
*block
)
9448 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9450 /* Collect labels in this block. We don't keep those corresponding
9451 to END {IF|SELECT}, these are checked in resolve_branch by going
9452 up through the code_stack. */
9453 for (c
= block
; c
; c
= c
->next
)
9455 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9456 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9459 /* Merge with labels from parent block. */
9462 gcc_assert (cs_base
->prev
->reachable_labels
);
9463 bitmap_ior_into (cs_base
->reachable_labels
,
9464 cs_base
->prev
->reachable_labels
);
9470 resolve_lock_unlock_event (gfc_code
*code
)
9472 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9473 && code
->expr1
->value
.function
.isym
9474 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9475 remove_caf_get_intrinsic (code
->expr1
);
9477 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9478 && (code
->expr1
->ts
.type
!= BT_DERIVED
9479 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9480 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9481 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9482 || code
->expr1
->rank
!= 0
9483 || (!gfc_is_coarray (code
->expr1
) &&
9484 !gfc_is_coindexed (code
->expr1
))))
9485 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9486 &code
->expr1
->where
);
9487 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9488 && (code
->expr1
->ts
.type
!= BT_DERIVED
9489 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9490 || code
->expr1
->ts
.u
.derived
->from_intmod
9491 != INTMOD_ISO_FORTRAN_ENV
9492 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9493 != ISOFORTRAN_EVENT_TYPE
9494 || code
->expr1
->rank
!= 0))
9495 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9496 &code
->expr1
->where
);
9497 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9498 && !gfc_is_coindexed (code
->expr1
))
9499 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9500 &code
->expr1
->where
);
9501 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9502 gfc_error ("Event variable argument at %L must be a coarray but not "
9503 "coindexed", &code
->expr1
->where
);
9507 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9508 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9509 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9510 &code
->expr2
->where
);
9513 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9514 _("STAT variable")))
9519 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9520 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9521 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9522 &code
->expr3
->where
);
9525 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9526 _("ERRMSG variable")))
9529 /* Check for LOCK the ACQUIRED_LOCK. */
9530 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9531 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9532 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9533 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9534 "variable", &code
->expr4
->where
);
9536 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9537 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9538 _("ACQUIRED_LOCK variable")))
9541 /* Check for EVENT WAIT the UNTIL_COUNT. */
9542 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9544 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9545 || code
->expr4
->rank
!= 0)
9546 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9547 "expression", &code
->expr4
->where
);
9553 resolve_critical (gfc_code
*code
)
9555 gfc_symtree
*symtree
;
9556 gfc_symbol
*lock_type
;
9557 char name
[GFC_MAX_SYMBOL_LEN
];
9558 static int serial
= 0;
9560 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9563 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9564 GFC_PREFIX ("lock_type"));
9566 lock_type
= symtree
->n
.sym
;
9569 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9572 lock_type
= symtree
->n
.sym
;
9573 lock_type
->attr
.flavor
= FL_DERIVED
;
9574 lock_type
->attr
.zero_comp
= 1;
9575 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9576 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9579 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9580 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9583 code
->resolved_sym
= symtree
->n
.sym
;
9584 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9585 symtree
->n
.sym
->attr
.referenced
= 1;
9586 symtree
->n
.sym
->attr
.artificial
= 1;
9587 symtree
->n
.sym
->attr
.codimension
= 1;
9588 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9589 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9590 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9591 symtree
->n
.sym
->as
->corank
= 1;
9592 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9593 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9594 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9596 gfc_commit_symbols();
9601 resolve_sync (gfc_code
*code
)
9603 /* Check imageset. The * case matches expr1 == NULL. */
9606 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9607 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9608 "INTEGER expression", &code
->expr1
->where
);
9609 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9610 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9611 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9612 &code
->expr1
->where
);
9613 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9614 && gfc_simplify_expr (code
->expr1
, 0))
9616 gfc_constructor
*cons
;
9617 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9618 for (; cons
; cons
= gfc_constructor_next (cons
))
9619 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9620 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9621 gfc_error ("Imageset argument at %L must between 1 and "
9622 "num_images()", &cons
->expr
->where
);
9627 gfc_resolve_expr (code
->expr2
);
9629 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9630 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9631 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9632 &code
->expr2
->where
);
9635 gfc_resolve_expr (code
->expr3
);
9637 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9638 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9639 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9640 &code
->expr3
->where
);
9644 /* Given a branch to a label, see if the branch is conforming.
9645 The code node describes where the branch is located. */
9648 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9655 /* Step one: is this a valid branching target? */
9657 if (label
->defined
== ST_LABEL_UNKNOWN
)
9659 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9664 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9666 gfc_error ("Statement at %L is not a valid branch target statement "
9667 "for the branch statement at %L", &label
->where
, &code
->loc
);
9671 /* Step two: make sure this branch is not a branch to itself ;-) */
9673 if (code
->here
== label
)
9676 "Branch at %L may result in an infinite loop", &code
->loc
);
9680 /* Step three: See if the label is in the same block as the
9681 branching statement. The hard work has been done by setting up
9682 the bitmap reachable_labels. */
9684 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9686 /* Check now whether there is a CRITICAL construct; if so, check
9687 whether the label is still visible outside of the CRITICAL block,
9688 which is invalid. */
9689 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9691 if (stack
->current
->op
== EXEC_CRITICAL
9692 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9693 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9694 "label at %L", &code
->loc
, &label
->where
);
9695 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9696 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9697 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9698 "for label at %L", &code
->loc
, &label
->where
);
9704 /* Step four: If we haven't found the label in the bitmap, it may
9705 still be the label of the END of the enclosing block, in which
9706 case we find it by going up the code_stack. */
9708 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9710 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9712 if (stack
->current
->op
== EXEC_CRITICAL
)
9714 /* Note: A label at END CRITICAL does not leave the CRITICAL
9715 construct as END CRITICAL is still part of it. */
9716 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9717 " at %L", &code
->loc
, &label
->where
);
9720 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9722 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9723 "label at %L", &code
->loc
, &label
->where
);
9730 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9734 /* The label is not in an enclosing block, so illegal. This was
9735 allowed in Fortran 66, so we allow it as extension. No
9736 further checks are necessary in this case. */
9737 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9738 "as the GOTO statement at %L", &label
->where
,
9744 /* Check whether EXPR1 has the same shape as EXPR2. */
9747 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9749 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9750 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9751 bool result
= false;
9754 /* Compare the rank. */
9755 if (expr1
->rank
!= expr2
->rank
)
9758 /* Compare the size of each dimension. */
9759 for (i
=0; i
<expr1
->rank
; i
++)
9761 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9764 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9767 if (mpz_cmp (shape
[i
], shape2
[i
]))
9771 /* When either of the two expression is an assumed size array, we
9772 ignore the comparison of dimension sizes. */
9777 gfc_clear_shape (shape
, i
);
9778 gfc_clear_shape (shape2
, i
);
9783 /* Check whether a WHERE assignment target or a WHERE mask expression
9784 has the same shape as the outmost WHERE mask expression. */
9787 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9793 cblock
= code
->block
;
9795 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9796 In case of nested WHERE, only the outmost one is stored. */
9797 if (mask
== NULL
) /* outmost WHERE */
9799 else /* inner WHERE */
9806 /* Check if the mask-expr has a consistent shape with the
9807 outmost WHERE mask-expr. */
9808 if (!resolve_where_shape (cblock
->expr1
, e
))
9809 gfc_error ("WHERE mask at %L has inconsistent shape",
9810 &cblock
->expr1
->where
);
9813 /* the assignment statement of a WHERE statement, or the first
9814 statement in where-body-construct of a WHERE construct */
9815 cnext
= cblock
->next
;
9820 /* WHERE assignment statement */
9823 /* Check shape consistent for WHERE assignment target. */
9824 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9825 gfc_error ("WHERE assignment target at %L has "
9826 "inconsistent shape", &cnext
->expr1
->where
);
9830 case EXEC_ASSIGN_CALL
:
9831 resolve_call (cnext
);
9832 if (!cnext
->resolved_sym
->attr
.elemental
)
9833 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9834 &cnext
->ext
.actual
->expr
->where
);
9837 /* WHERE or WHERE construct is part of a where-body-construct */
9839 resolve_where (cnext
, e
);
9843 gfc_error ("Unsupported statement inside WHERE at %L",
9846 /* the next statement within the same where-body-construct */
9847 cnext
= cnext
->next
;
9849 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9850 cblock
= cblock
->block
;
9855 /* Resolve assignment in FORALL construct.
9856 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9857 FORALL index variables. */
9860 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9864 for (n
= 0; n
< nvar
; n
++)
9866 gfc_symbol
*forall_index
;
9868 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9870 /* Check whether the assignment target is one of the FORALL index
9872 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9873 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9874 gfc_error ("Assignment to a FORALL index variable at %L",
9875 &code
->expr1
->where
);
9878 /* If one of the FORALL index variables doesn't appear in the
9879 assignment variable, then there could be a many-to-one
9880 assignment. Emit a warning rather than an error because the
9881 mask could be resolving this problem. */
9882 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9883 gfc_warning (0, "The FORALL with index %qs is not used on the "
9884 "left side of the assignment at %L and so might "
9885 "cause multiple assignment to this object",
9886 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9892 /* Resolve WHERE statement in FORALL construct. */
9895 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9896 gfc_expr
**var_expr
)
9901 cblock
= code
->block
;
9904 /* the assignment statement of a WHERE statement, or the first
9905 statement in where-body-construct of a WHERE construct */
9906 cnext
= cblock
->next
;
9911 /* WHERE assignment statement */
9913 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9916 /* WHERE operator assignment statement */
9917 case EXEC_ASSIGN_CALL
:
9918 resolve_call (cnext
);
9919 if (!cnext
->resolved_sym
->attr
.elemental
)
9920 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9921 &cnext
->ext
.actual
->expr
->where
);
9924 /* WHERE or WHERE construct is part of a where-body-construct */
9926 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9930 gfc_error ("Unsupported statement inside WHERE at %L",
9933 /* the next statement within the same where-body-construct */
9934 cnext
= cnext
->next
;
9936 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9937 cblock
= cblock
->block
;
9942 /* Traverse the FORALL body to check whether the following errors exist:
9943 1. For assignment, check if a many-to-one assignment happens.
9944 2. For WHERE statement, check the WHERE body to see if there is any
9945 many-to-one assignment. */
9948 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9952 c
= code
->block
->next
;
9958 case EXEC_POINTER_ASSIGN
:
9959 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9962 case EXEC_ASSIGN_CALL
:
9966 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9967 there is no need to handle it here. */
9971 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9976 /* The next statement in the FORALL body. */
9982 /* Counts the number of iterators needed inside a forall construct, including
9983 nested forall constructs. This is used to allocate the needed memory
9984 in gfc_resolve_forall. */
9987 gfc_count_forall_iterators (gfc_code
*code
)
9989 int max_iters
, sub_iters
, current_iters
;
9990 gfc_forall_iterator
*fa
;
9992 gcc_assert(code
->op
== EXEC_FORALL
);
9996 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9999 code
= code
->block
->next
;
10003 if (code
->op
== EXEC_FORALL
)
10005 sub_iters
= gfc_count_forall_iterators (code
);
10006 if (sub_iters
> max_iters
)
10007 max_iters
= sub_iters
;
10012 return current_iters
+ max_iters
;
10016 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10017 gfc_resolve_forall_body to resolve the FORALL body. */
10020 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10022 static gfc_expr
**var_expr
;
10023 static int total_var
= 0;
10024 static int nvar
= 0;
10025 int i
, old_nvar
, tmp
;
10026 gfc_forall_iterator
*fa
;
10030 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10033 /* Start to resolve a FORALL construct */
10034 if (forall_save
== 0)
10036 /* Count the total number of FORALL indices in the nested FORALL
10037 construct in order to allocate the VAR_EXPR with proper size. */
10038 total_var
= gfc_count_forall_iterators (code
);
10040 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10041 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10044 /* The information about FORALL iterator, including FORALL indices start, end
10045 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10046 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10048 /* Fortran 20008: C738 (R753). */
10049 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10051 gfc_error ("FORALL index-name at %L must be a scalar variable "
10052 "of type integer", &fa
->var
->where
);
10056 /* Check if any outer FORALL index name is the same as the current
10058 for (i
= 0; i
< nvar
; i
++)
10060 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10061 gfc_error ("An outer FORALL construct already has an index "
10062 "with this name %L", &fa
->var
->where
);
10065 /* Record the current FORALL index. */
10066 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10070 /* No memory leak. */
10071 gcc_assert (nvar
<= total_var
);
10074 /* Resolve the FORALL body. */
10075 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10077 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10078 gfc_resolve_blocks (code
->block
, ns
);
10082 /* Free only the VAR_EXPRs allocated in this frame. */
10083 for (i
= nvar
; i
< tmp
; i
++)
10084 gfc_free_expr (var_expr
[i
]);
10088 /* We are in the outermost FORALL construct. */
10089 gcc_assert (forall_save
== 0);
10091 /* VAR_EXPR is not needed any more. */
10098 /* Resolve a BLOCK construct statement. */
10101 resolve_block_construct (gfc_code
* code
)
10103 /* Resolve the BLOCK's namespace. */
10104 gfc_resolve (code
->ext
.block
.ns
);
10106 /* For an ASSOCIATE block, the associations (and their targets) are already
10107 resolved during resolve_symbol. */
10111 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10115 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10119 for (; b
; b
= b
->block
)
10121 t
= gfc_resolve_expr (b
->expr1
);
10122 if (!gfc_resolve_expr (b
->expr2
))
10128 if (t
&& b
->expr1
!= NULL
10129 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10130 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10136 && b
->expr1
!= NULL
10137 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10138 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10143 resolve_branch (b
->label1
, b
);
10147 resolve_block_construct (b
);
10151 case EXEC_SELECT_TYPE
:
10154 case EXEC_DO_WHILE
:
10155 case EXEC_DO_CONCURRENT
:
10156 case EXEC_CRITICAL
:
10159 case EXEC_IOLENGTH
:
10163 case EXEC_OMP_ATOMIC
:
10164 case EXEC_OACC_ATOMIC
:
10166 gfc_omp_atomic_op aop
10167 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10169 /* Verify this before calling gfc_resolve_code, which might
10171 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10172 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10173 && b
->next
->next
== NULL
)
10174 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10175 && b
->next
->next
!= NULL
10176 && b
->next
->next
->op
== EXEC_ASSIGN
10177 && b
->next
->next
->next
== NULL
));
10181 case EXEC_OACC_PARALLEL_LOOP
:
10182 case EXEC_OACC_PARALLEL
:
10183 case EXEC_OACC_KERNELS_LOOP
:
10184 case EXEC_OACC_KERNELS
:
10185 case EXEC_OACC_DATA
:
10186 case EXEC_OACC_HOST_DATA
:
10187 case EXEC_OACC_LOOP
:
10188 case EXEC_OACC_UPDATE
:
10189 case EXEC_OACC_WAIT
:
10190 case EXEC_OACC_CACHE
:
10191 case EXEC_OACC_ENTER_DATA
:
10192 case EXEC_OACC_EXIT_DATA
:
10193 case EXEC_OACC_ROUTINE
:
10194 case EXEC_OMP_CRITICAL
:
10195 case EXEC_OMP_DISTRIBUTE
:
10196 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10197 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10198 case EXEC_OMP_DISTRIBUTE_SIMD
:
10200 case EXEC_OMP_DO_SIMD
:
10201 case EXEC_OMP_MASTER
:
10202 case EXEC_OMP_ORDERED
:
10203 case EXEC_OMP_PARALLEL
:
10204 case EXEC_OMP_PARALLEL_DO
:
10205 case EXEC_OMP_PARALLEL_DO_SIMD
:
10206 case EXEC_OMP_PARALLEL_SECTIONS
:
10207 case EXEC_OMP_PARALLEL_WORKSHARE
:
10208 case EXEC_OMP_SECTIONS
:
10209 case EXEC_OMP_SIMD
:
10210 case EXEC_OMP_SINGLE
:
10211 case EXEC_OMP_TARGET
:
10212 case EXEC_OMP_TARGET_DATA
:
10213 case EXEC_OMP_TARGET_ENTER_DATA
:
10214 case EXEC_OMP_TARGET_EXIT_DATA
:
10215 case EXEC_OMP_TARGET_PARALLEL
:
10216 case EXEC_OMP_TARGET_PARALLEL_DO
:
10217 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10218 case EXEC_OMP_TARGET_SIMD
:
10219 case EXEC_OMP_TARGET_TEAMS
:
10220 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10221 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10222 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10223 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10224 case EXEC_OMP_TARGET_UPDATE
:
10225 case EXEC_OMP_TASK
:
10226 case EXEC_OMP_TASKGROUP
:
10227 case EXEC_OMP_TASKLOOP
:
10228 case EXEC_OMP_TASKLOOP_SIMD
:
10229 case EXEC_OMP_TASKWAIT
:
10230 case EXEC_OMP_TASKYIELD
:
10231 case EXEC_OMP_TEAMS
:
10232 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10233 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10234 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10235 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10236 case EXEC_OMP_WORKSHARE
:
10240 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10243 gfc_resolve_code (b
->next
, ns
);
10248 /* Does everything to resolve an ordinary assignment. Returns true
10249 if this is an interface assignment. */
10251 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10258 symbol_attribute attr
;
10260 if (gfc_extend_assign (code
, ns
))
10264 if (code
->op
== EXEC_ASSIGN_CALL
)
10266 lhs
= code
->ext
.actual
->expr
;
10267 rhsptr
= &code
->ext
.actual
->next
->expr
;
10271 gfc_actual_arglist
* args
;
10272 gfc_typebound_proc
* tbp
;
10274 gcc_assert (code
->op
== EXEC_COMPCALL
);
10276 args
= code
->expr1
->value
.compcall
.actual
;
10278 rhsptr
= &args
->next
->expr
;
10280 tbp
= code
->expr1
->value
.compcall
.tbp
;
10281 gcc_assert (!tbp
->is_generic
);
10284 /* Make a temporary rhs when there is a default initializer
10285 and rhs is the same symbol as the lhs. */
10286 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10287 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10288 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10289 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10290 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10299 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10300 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10304 /* Handle the case of a BOZ literal on the RHS. */
10305 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10308 if (warn_surprising
)
10309 gfc_warning (OPT_Wsurprising
,
10310 "BOZ literal at %L is bitwise transferred "
10311 "non-integer symbol %qs", &code
->loc
,
10312 lhs
->symtree
->n
.sym
->name
);
10314 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10316 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10318 if (rc
== ARITH_UNDERFLOW
)
10319 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10320 ". This check can be disabled with the option "
10321 "%<-fno-range-check%>", &rhs
->where
);
10322 else if (rc
== ARITH_OVERFLOW
)
10323 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10324 ". This check can be disabled with the option "
10325 "%<-fno-range-check%>", &rhs
->where
);
10326 else if (rc
== ARITH_NAN
)
10327 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10328 ". This check can be disabled with the option "
10329 "%<-fno-range-check%>", &rhs
->where
);
10334 if (lhs
->ts
.type
== BT_CHARACTER
10335 && warn_character_truncation
)
10337 HOST_WIDE_INT llen
= 0, rlen
= 0;
10338 if (lhs
->ts
.u
.cl
!= NULL
10339 && lhs
->ts
.u
.cl
->length
!= NULL
10340 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10341 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10343 if (rhs
->expr_type
== EXPR_CONSTANT
)
10344 rlen
= rhs
->value
.character
.length
;
10346 else if (rhs
->ts
.u
.cl
!= NULL
10347 && rhs
->ts
.u
.cl
->length
!= NULL
10348 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10349 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10351 if (rlen
&& llen
&& rlen
> llen
)
10352 gfc_warning_now (OPT_Wcharacter_truncation
,
10353 "CHARACTER expression will be truncated "
10354 "in assignment (%ld/%ld) at %L",
10355 (long) llen
, (long) rlen
, &code
->loc
);
10358 /* Ensure that a vector index expression for the lvalue is evaluated
10359 to a temporary if the lvalue symbol is referenced in it. */
10362 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10363 if (ref
->type
== REF_ARRAY
)
10365 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10366 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10367 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10368 ref
->u
.ar
.start
[n
]))
10370 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10374 if (gfc_pure (NULL
))
10376 if (lhs
->ts
.type
== BT_DERIVED
10377 && lhs
->expr_type
== EXPR_VARIABLE
10378 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10379 && rhs
->expr_type
== EXPR_VARIABLE
10380 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10381 || gfc_is_coindexed (rhs
)))
10383 /* F2008, C1283. */
10384 if (gfc_is_coindexed (rhs
))
10385 gfc_error ("Coindexed expression at %L is assigned to "
10386 "a derived type variable with a POINTER "
10387 "component in a PURE procedure",
10390 gfc_error ("The impure variable at %L is assigned to "
10391 "a derived type variable with a POINTER "
10392 "component in a PURE procedure (12.6)",
10397 /* Fortran 2008, C1283. */
10398 if (gfc_is_coindexed (lhs
))
10400 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10401 "procedure", &rhs
->where
);
10406 if (gfc_implicit_pure (NULL
))
10408 if (lhs
->expr_type
== EXPR_VARIABLE
10409 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10410 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10411 gfc_unset_implicit_pure (NULL
);
10413 if (lhs
->ts
.type
== BT_DERIVED
10414 && lhs
->expr_type
== EXPR_VARIABLE
10415 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10416 && rhs
->expr_type
== EXPR_VARIABLE
10417 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10418 || gfc_is_coindexed (rhs
)))
10419 gfc_unset_implicit_pure (NULL
);
10421 /* Fortran 2008, C1283. */
10422 if (gfc_is_coindexed (lhs
))
10423 gfc_unset_implicit_pure (NULL
);
10426 /* F2008, 7.2.1.2. */
10427 attr
= gfc_expr_attr (lhs
);
10428 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10430 if (attr
.codimension
)
10432 gfc_error ("Assignment to polymorphic coarray at %L is not "
10433 "permitted", &lhs
->where
);
10436 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10437 "polymorphic variable at %L", &lhs
->where
))
10439 if (!flag_realloc_lhs
)
10441 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10442 "requires %<-frealloc-lhs%>", &lhs
->where
);
10446 else if (lhs
->ts
.type
== BT_CLASS
)
10448 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10449 "assignment at %L - check that there is a matching specific "
10450 "subroutine for '=' operator", &lhs
->where
);
10454 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10456 /* F2008, Section 7.2.1.2. */
10457 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10459 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10460 "component in assignment at %L", &lhs
->where
);
10464 /* Assign the 'data' of a class object to a derived type. */
10465 if (lhs
->ts
.type
== BT_DERIVED
10466 && rhs
->ts
.type
== BT_CLASS
10467 && rhs
->expr_type
!= EXPR_ARRAY
)
10468 gfc_add_data_component (rhs
);
10470 /* Make sure there is a vtable and, in particular, a _copy for the
10472 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10473 gfc_find_vtab (&rhs
->ts
);
10475 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10477 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10478 && code
->expr2
->value
.function
.isym
10479 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10480 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10481 && !gfc_expr_attr (rhs
).allocatable
10482 && !gfc_has_vector_subscript (rhs
)));
10484 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10486 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10487 Additionally, insert this code when the RHS is a CAF as we then use the
10488 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10489 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10490 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10492 if (caf_convert_to_send
)
10494 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10495 && code
->expr2
->value
.function
.isym
10496 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10497 remove_caf_get_intrinsic (code
->expr2
);
10498 code
->op
= EXEC_CALL
;
10499 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10500 code
->resolved_sym
= code
->symtree
->n
.sym
;
10501 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10502 code
->resolved_sym
->attr
.intrinsic
= 1;
10503 code
->resolved_sym
->attr
.subroutine
= 1;
10504 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10505 gfc_commit_symbol (code
->resolved_sym
);
10506 code
->ext
.actual
= gfc_get_actual_arglist ();
10507 code
->ext
.actual
->expr
= lhs
;
10508 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10509 code
->ext
.actual
->next
->expr
= rhs
;
10510 code
->expr1
= NULL
;
10511 code
->expr2
= NULL
;
10518 /* Add a component reference onto an expression. */
10521 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10526 ref
= &((*ref
)->next
);
10527 *ref
= gfc_get_ref ();
10528 (*ref
)->type
= REF_COMPONENT
;
10529 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10530 (*ref
)->u
.c
.component
= c
;
10533 /* Add a full array ref, as necessary. */
10536 gfc_add_full_array_ref (e
, c
->as
);
10537 e
->rank
= c
->as
->rank
;
10542 /* Build an assignment. Keep the argument 'op' for future use, so that
10543 pointer assignments can be made. */
10546 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10547 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10549 gfc_code
*this_code
;
10551 this_code
= gfc_get_code (op
);
10552 this_code
->next
= NULL
;
10553 this_code
->expr1
= gfc_copy_expr (expr1
);
10554 this_code
->expr2
= gfc_copy_expr (expr2
);
10555 this_code
->loc
= loc
;
10556 if (comp1
&& comp2
)
10558 add_comp_ref (this_code
->expr1
, comp1
);
10559 add_comp_ref (this_code
->expr2
, comp2
);
10566 /* Makes a temporary variable expression based on the characteristics of
10567 a given variable expression. */
10570 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10572 static int serial
= 0;
10573 char name
[GFC_MAX_SYMBOL_LEN
];
10575 gfc_array_spec
*as
;
10576 gfc_array_ref
*aref
;
10579 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10580 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10581 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10587 /* Obtain the arrayspec for the temporary. */
10588 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10589 && e
->expr_type
!= EXPR_FUNCTION
10590 && e
->expr_type
!= EXPR_OP
)
10592 aref
= gfc_find_array_ref (e
);
10593 if (e
->expr_type
== EXPR_VARIABLE
10594 && e
->symtree
->n
.sym
->as
== aref
->as
)
10598 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10599 if (ref
->type
== REF_COMPONENT
10600 && ref
->u
.c
.component
->as
== aref
->as
)
10608 /* Add the attributes and the arrayspec to the temporary. */
10609 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10610 tmp
->n
.sym
->attr
.function
= 0;
10611 tmp
->n
.sym
->attr
.result
= 0;
10612 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10613 tmp
->n
.sym
->attr
.dummy
= 0;
10614 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10618 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10621 if (as
->type
== AS_DEFERRED
)
10622 tmp
->n
.sym
->attr
.allocatable
= 1;
10624 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10625 || e
->expr_type
== EXPR_FUNCTION
10626 || e
->expr_type
== EXPR_OP
))
10628 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10629 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10630 tmp
->n
.sym
->as
->rank
= e
->rank
;
10631 tmp
->n
.sym
->attr
.allocatable
= 1;
10632 tmp
->n
.sym
->attr
.dimension
= 1;
10635 tmp
->n
.sym
->attr
.dimension
= 0;
10637 gfc_set_sym_referenced (tmp
->n
.sym
);
10638 gfc_commit_symbol (tmp
->n
.sym
);
10639 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10641 /* Should the lhs be a section, use its array ref for the
10642 temporary expression. */
10643 if (aref
&& aref
->type
!= AR_FULL
)
10645 gfc_free_ref_list (e
->ref
);
10646 e
->ref
= gfc_copy_ref (ref
);
10652 /* Add one line of code to the code chain, making sure that 'head' and
10653 'tail' are appropriately updated. */
10656 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10658 gcc_assert (this_code
);
10660 *head
= *tail
= *this_code
;
10662 *tail
= gfc_append_code (*tail
, *this_code
);
10667 /* Counts the potential number of part array references that would
10668 result from resolution of typebound defined assignments. */
10671 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10674 int c_depth
= 0, t_depth
;
10676 for (c
= derived
->components
; c
; c
= c
->next
)
10678 if ((!gfc_bt_struct (c
->ts
.type
)
10680 || c
->attr
.allocatable
10681 || c
->attr
.proc_pointer_comp
10682 || c
->attr
.class_pointer
10683 || c
->attr
.proc_pointer
)
10684 && !c
->attr
.defined_assign_comp
)
10687 if (c
->as
&& c_depth
== 0)
10690 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10691 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10696 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10698 return depth
+ c_depth
;
10702 /* Implement 7.2.1.3 of the F08 standard:
10703 "An intrinsic assignment where the variable is of derived type is
10704 performed as if each component of the variable were assigned from the
10705 corresponding component of expr using pointer assignment (7.2.2) for
10706 each pointer component, defined assignment for each nonpointer
10707 nonallocatable component of a type that has a type-bound defined
10708 assignment consistent with the component, intrinsic assignment for
10709 each other nonpointer nonallocatable component, ..."
10711 The pointer assignments are taken care of by the intrinsic
10712 assignment of the structure itself. This function recursively adds
10713 defined assignments where required. The recursion is accomplished
10714 by calling gfc_resolve_code.
10716 When the lhs in a defined assignment has intent INOUT, we need a
10717 temporary for the lhs. In pseudo-code:
10719 ! Only call function lhs once.
10720 if (lhs is not a constant or an variable)
10723 ! Do the intrinsic assignment
10725 ! Now do the defined assignments
10726 do over components with typebound defined assignment [%cmp]
10727 #if one component's assignment procedure is INOUT
10729 #if expr2 non-variable
10735 t1%cmp {defined=} expr2%cmp
10741 expr1%cmp {defined=} expr2%cmp
10745 /* The temporary assignments have to be put on top of the additional
10746 code to avoid the result being changed by the intrinsic assignment.
10748 static int component_assignment_level
= 0;
10749 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10752 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10754 gfc_component
*comp1
, *comp2
;
10755 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10757 int error_count
, depth
;
10759 gfc_get_errors (NULL
, &error_count
);
10761 /* Filter out continuing processing after an error. */
10763 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10764 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10767 /* TODO: Handle more than one part array reference in assignments. */
10768 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10769 (*code
)->expr1
->rank
? 1 : 0);
10772 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10773 "done because multiple part array references would "
10774 "occur in intermediate expressions.", &(*code
)->loc
);
10778 component_assignment_level
++;
10780 /* Create a temporary so that functions get called only once. */
10781 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10782 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10784 gfc_expr
*tmp_expr
;
10786 /* Assign the rhs to the temporary. */
10787 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10788 this_code
= build_assignment (EXEC_ASSIGN
,
10789 tmp_expr
, (*code
)->expr2
,
10790 NULL
, NULL
, (*code
)->loc
);
10791 /* Add the code and substitute the rhs expression. */
10792 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10793 gfc_free_expr ((*code
)->expr2
);
10794 (*code
)->expr2
= tmp_expr
;
10797 /* Do the intrinsic assignment. This is not needed if the lhs is one
10798 of the temporaries generated here, since the intrinsic assignment
10799 to the final result already does this. */
10800 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10802 this_code
= build_assignment (EXEC_ASSIGN
,
10803 (*code
)->expr1
, (*code
)->expr2
,
10804 NULL
, NULL
, (*code
)->loc
);
10805 add_code_to_chain (&this_code
, &head
, &tail
);
10808 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10809 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10812 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10814 bool inout
= false;
10816 /* The intrinsic assignment does the right thing for pointers
10817 of all kinds and allocatable components. */
10818 if (!gfc_bt_struct (comp1
->ts
.type
)
10819 || comp1
->attr
.pointer
10820 || comp1
->attr
.allocatable
10821 || comp1
->attr
.proc_pointer_comp
10822 || comp1
->attr
.class_pointer
10823 || comp1
->attr
.proc_pointer
)
10826 /* Make an assigment for this component. */
10827 this_code
= build_assignment (EXEC_ASSIGN
,
10828 (*code
)->expr1
, (*code
)->expr2
,
10829 comp1
, comp2
, (*code
)->loc
);
10831 /* Convert the assignment if there is a defined assignment for
10832 this type. Otherwise, using the call from gfc_resolve_code,
10833 recurse into its components. */
10834 gfc_resolve_code (this_code
, ns
);
10836 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10838 gfc_formal_arglist
*dummy_args
;
10840 /* Check that there is a typebound defined assignment. If not,
10841 then this must be a module defined assignment. We cannot
10842 use the defined_assign_comp attribute here because it must
10843 be this derived type that has the defined assignment and not
10845 if (!(comp1
->ts
.u
.derived
->f2k_derived
10846 && comp1
->ts
.u
.derived
->f2k_derived
10847 ->tb_op
[INTRINSIC_ASSIGN
]))
10849 gfc_free_statements (this_code
);
10854 /* If the first argument of the subroutine has intent INOUT
10855 a temporary must be generated and used instead. */
10856 rsym
= this_code
->resolved_sym
;
10857 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10859 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10861 gfc_code
*temp_code
;
10864 /* Build the temporary required for the assignment and put
10865 it at the head of the generated code. */
10868 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10869 temp_code
= build_assignment (EXEC_ASSIGN
,
10870 t1
, (*code
)->expr1
,
10871 NULL
, NULL
, (*code
)->loc
);
10873 /* For allocatable LHS, check whether it is allocated. Note
10874 that allocatable components with defined assignment are
10875 not yet support. See PR 57696. */
10876 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10880 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10881 block
= gfc_get_code (EXEC_IF
);
10882 block
->block
= gfc_get_code (EXEC_IF
);
10883 block
->block
->expr1
10884 = gfc_build_intrinsic_call (ns
,
10885 GFC_ISYM_ALLOCATED
, "allocated",
10886 (*code
)->loc
, 1, e
);
10887 block
->block
->next
= temp_code
;
10890 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10893 /* Replace the first actual arg with the component of the
10895 gfc_free_expr (this_code
->ext
.actual
->expr
);
10896 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10897 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10899 /* If the LHS variable is allocatable and wasn't allocated and
10900 the temporary is allocatable, pointer assign the address of
10901 the freshly allocated LHS to the temporary. */
10902 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10903 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10908 cond
= gfc_get_expr ();
10909 cond
->ts
.type
= BT_LOGICAL
;
10910 cond
->ts
.kind
= gfc_default_logical_kind
;
10911 cond
->expr_type
= EXPR_OP
;
10912 cond
->where
= (*code
)->loc
;
10913 cond
->value
.op
.op
= INTRINSIC_NOT
;
10914 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10915 GFC_ISYM_ALLOCATED
, "allocated",
10916 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10917 block
= gfc_get_code (EXEC_IF
);
10918 block
->block
= gfc_get_code (EXEC_IF
);
10919 block
->block
->expr1
= cond
;
10920 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10921 t1
, (*code
)->expr1
,
10922 NULL
, NULL
, (*code
)->loc
);
10923 add_code_to_chain (&block
, &head
, &tail
);
10927 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10929 /* Don't add intrinsic assignments since they are already
10930 effected by the intrinsic assignment of the structure. */
10931 gfc_free_statements (this_code
);
10936 add_code_to_chain (&this_code
, &head
, &tail
);
10940 /* Transfer the value to the final result. */
10941 this_code
= build_assignment (EXEC_ASSIGN
,
10942 (*code
)->expr1
, t1
,
10943 comp1
, comp2
, (*code
)->loc
);
10944 add_code_to_chain (&this_code
, &head
, &tail
);
10948 /* Put the temporary assignments at the top of the generated code. */
10949 if (tmp_head
&& component_assignment_level
== 1)
10951 gfc_append_code (tmp_head
, head
);
10953 tmp_head
= tmp_tail
= NULL
;
10956 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10957 // not accidentally deallocated. Hence, nullify t1.
10958 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10959 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10965 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10966 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10967 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10968 block
= gfc_get_code (EXEC_IF
);
10969 block
->block
= gfc_get_code (EXEC_IF
);
10970 block
->block
->expr1
= cond
;
10971 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10972 t1
, gfc_get_null_expr (&(*code
)->loc
),
10973 NULL
, NULL
, (*code
)->loc
);
10974 gfc_append_code (tail
, block
);
10978 /* Now attach the remaining code chain to the input code. Step on
10979 to the end of the new code since resolution is complete. */
10980 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10981 tail
->next
= (*code
)->next
;
10982 /* Overwrite 'code' because this would place the intrinsic assignment
10983 before the temporary for the lhs is created. */
10984 gfc_free_expr ((*code
)->expr1
);
10985 gfc_free_expr ((*code
)->expr2
);
10991 component_assignment_level
--;
10995 /* F2008: Pointer function assignments are of the form:
10996 ptr_fcn (args) = expr
10997 This function breaks these assignments into two statements:
10998 temporary_pointer => ptr_fcn(args)
10999 temporary_pointer = expr */
11002 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11004 gfc_expr
*tmp_ptr_expr
;
11005 gfc_code
*this_code
;
11006 gfc_component
*comp
;
11009 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11012 /* Even if standard does not support this feature, continue to build
11013 the two statements to avoid upsetting frontend_passes.c. */
11014 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11015 "%L", &(*code
)->loc
);
11017 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11020 s
= comp
->ts
.interface
;
11022 s
= (*code
)->expr1
->symtree
->n
.sym
;
11024 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11026 gfc_error ("The function result on the lhs of the assignment at "
11027 "%L must have the pointer attribute.",
11028 &(*code
)->expr1
->where
);
11029 (*code
)->op
= EXEC_NOP
;
11033 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11035 /* get_temp_from_expression is set up for ordinary assignments. To that
11036 end, where array bounds are not known, arrays are made allocatable.
11037 Change the temporary to a pointer here. */
11038 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11039 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11040 tmp_ptr_expr
->where
= (*code
)->loc
;
11042 this_code
= build_assignment (EXEC_ASSIGN
,
11043 tmp_ptr_expr
, (*code
)->expr2
,
11044 NULL
, NULL
, (*code
)->loc
);
11045 this_code
->next
= (*code
)->next
;
11046 (*code
)->next
= this_code
;
11047 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11048 (*code
)->expr2
= (*code
)->expr1
;
11049 (*code
)->expr1
= tmp_ptr_expr
;
11055 /* Deferred character length assignments from an operator expression
11056 require a temporary because the character length of the lhs can
11057 change in the course of the assignment. */
11060 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11062 gfc_expr
*tmp_expr
;
11063 gfc_code
*this_code
;
11065 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11066 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11067 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11070 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11073 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11074 tmp_expr
->where
= (*code
)->loc
;
11076 /* A new charlen is required to ensure that the variable string
11077 length is different to that of the original lhs. */
11078 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11079 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11080 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11081 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11083 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11085 this_code
= build_assignment (EXEC_ASSIGN
,
11087 gfc_copy_expr (tmp_expr
),
11088 NULL
, NULL
, (*code
)->loc
);
11090 (*code
)->expr1
= tmp_expr
;
11092 this_code
->next
= (*code
)->next
;
11093 (*code
)->next
= this_code
;
11099 /* Given a block of code, recursively resolve everything pointed to by this
11103 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11105 int omp_workshare_save
;
11106 int forall_save
, do_concurrent_save
;
11110 frame
.prev
= cs_base
;
11114 find_reachable_labels (code
);
11116 for (; code
; code
= code
->next
)
11118 frame
.current
= code
;
11119 forall_save
= forall_flag
;
11120 do_concurrent_save
= gfc_do_concurrent_flag
;
11122 if (code
->op
== EXEC_FORALL
)
11125 gfc_resolve_forall (code
, ns
, forall_save
);
11128 else if (code
->block
)
11130 omp_workshare_save
= -1;
11133 case EXEC_OACC_PARALLEL_LOOP
:
11134 case EXEC_OACC_PARALLEL
:
11135 case EXEC_OACC_KERNELS_LOOP
:
11136 case EXEC_OACC_KERNELS
:
11137 case EXEC_OACC_DATA
:
11138 case EXEC_OACC_HOST_DATA
:
11139 case EXEC_OACC_LOOP
:
11140 gfc_resolve_oacc_blocks (code
, ns
);
11142 case EXEC_OMP_PARALLEL_WORKSHARE
:
11143 omp_workshare_save
= omp_workshare_flag
;
11144 omp_workshare_flag
= 1;
11145 gfc_resolve_omp_parallel_blocks (code
, ns
);
11147 case EXEC_OMP_PARALLEL
:
11148 case EXEC_OMP_PARALLEL_DO
:
11149 case EXEC_OMP_PARALLEL_DO_SIMD
:
11150 case EXEC_OMP_PARALLEL_SECTIONS
:
11151 case EXEC_OMP_TARGET_PARALLEL
:
11152 case EXEC_OMP_TARGET_PARALLEL_DO
:
11153 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11154 case EXEC_OMP_TARGET_TEAMS
:
11155 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11156 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11157 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11158 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11159 case EXEC_OMP_TASK
:
11160 case EXEC_OMP_TASKLOOP
:
11161 case EXEC_OMP_TASKLOOP_SIMD
:
11162 case EXEC_OMP_TEAMS
:
11163 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11164 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11165 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11166 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11167 omp_workshare_save
= omp_workshare_flag
;
11168 omp_workshare_flag
= 0;
11169 gfc_resolve_omp_parallel_blocks (code
, ns
);
11171 case EXEC_OMP_DISTRIBUTE
:
11172 case EXEC_OMP_DISTRIBUTE_SIMD
:
11174 case EXEC_OMP_DO_SIMD
:
11175 case EXEC_OMP_SIMD
:
11176 case EXEC_OMP_TARGET_SIMD
:
11177 gfc_resolve_omp_do_blocks (code
, ns
);
11179 case EXEC_SELECT_TYPE
:
11180 /* Blocks are handled in resolve_select_type because we have
11181 to transform the SELECT TYPE into ASSOCIATE first. */
11183 case EXEC_DO_CONCURRENT
:
11184 gfc_do_concurrent_flag
= 1;
11185 gfc_resolve_blocks (code
->block
, ns
);
11186 gfc_do_concurrent_flag
= 2;
11188 case EXEC_OMP_WORKSHARE
:
11189 omp_workshare_save
= omp_workshare_flag
;
11190 omp_workshare_flag
= 1;
11193 gfc_resolve_blocks (code
->block
, ns
);
11197 if (omp_workshare_save
!= -1)
11198 omp_workshare_flag
= omp_workshare_save
;
11202 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11203 t
= gfc_resolve_expr (code
->expr1
);
11204 forall_flag
= forall_save
;
11205 gfc_do_concurrent_flag
= do_concurrent_save
;
11207 if (!gfc_resolve_expr (code
->expr2
))
11210 if (code
->op
== EXEC_ALLOCATE
11211 && !gfc_resolve_expr (code
->expr3
))
11217 case EXEC_END_BLOCK
:
11218 case EXEC_END_NESTED_BLOCK
:
11222 case EXEC_ERROR_STOP
:
11224 case EXEC_CONTINUE
:
11226 case EXEC_ASSIGN_CALL
:
11229 case EXEC_CRITICAL
:
11230 resolve_critical (code
);
11233 case EXEC_SYNC_ALL
:
11234 case EXEC_SYNC_IMAGES
:
11235 case EXEC_SYNC_MEMORY
:
11236 resolve_sync (code
);
11241 case EXEC_EVENT_POST
:
11242 case EXEC_EVENT_WAIT
:
11243 resolve_lock_unlock_event (code
);
11246 case EXEC_FAIL_IMAGE
:
11247 case EXEC_FORM_TEAM
:
11248 case EXEC_CHANGE_TEAM
:
11249 case EXEC_END_TEAM
:
11250 case EXEC_SYNC_TEAM
:
11254 /* Keep track of which entry we are up to. */
11255 current_entry_id
= code
->ext
.entry
->id
;
11259 resolve_where (code
, NULL
);
11263 if (code
->expr1
!= NULL
)
11265 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11266 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11267 "INTEGER variable", &code
->expr1
->where
);
11268 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11269 gfc_error ("Variable %qs has not been assigned a target "
11270 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11271 &code
->expr1
->where
);
11274 resolve_branch (code
->label1
, code
);
11278 if (code
->expr1
!= NULL
11279 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11280 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11281 "INTEGER return specifier", &code
->expr1
->where
);
11284 case EXEC_INIT_ASSIGN
:
11285 case EXEC_END_PROCEDURE
:
11292 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11294 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11295 && code
->expr1
->value
.function
.isym
11296 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11297 remove_caf_get_intrinsic (code
->expr1
);
11299 /* If this is a pointer function in an lvalue variable context,
11300 the new code will have to be resolved afresh. This is also the
11301 case with an error, where the code is transformed into NOP to
11302 prevent ICEs downstream. */
11303 if (resolve_ptr_fcn_assign (&code
, ns
)
11304 || code
->op
== EXEC_NOP
)
11307 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11311 if (resolve_ordinary_assign (code
, ns
))
11313 if (code
->op
== EXEC_COMPCALL
)
11319 /* Check for dependencies in deferred character length array
11320 assignments and generate a temporary, if necessary. */
11321 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11324 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11325 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11326 && code
->expr1
->ts
.u
.derived
11327 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11328 generate_component_assignments (&code
, ns
);
11332 case EXEC_LABEL_ASSIGN
:
11333 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11334 gfc_error ("Label %d referenced at %L is never defined",
11335 code
->label1
->value
, &code
->label1
->where
);
11337 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11338 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11339 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11340 != gfc_default_integer_kind
11341 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11342 gfc_error ("ASSIGN statement at %L requires a scalar "
11343 "default INTEGER variable", &code
->expr1
->where
);
11346 case EXEC_POINTER_ASSIGN
:
11353 /* This is both a variable definition and pointer assignment
11354 context, so check both of them. For rank remapping, a final
11355 array ref may be present on the LHS and fool gfc_expr_attr
11356 used in gfc_check_vardef_context. Remove it. */
11357 e
= remove_last_array_ref (code
->expr1
);
11358 t
= gfc_check_vardef_context (e
, true, false, false,
11359 _("pointer assignment"));
11361 t
= gfc_check_vardef_context (e
, false, false, false,
11362 _("pointer assignment"));
11367 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11369 /* Assigning a class object always is a regular assign. */
11370 if (code
->expr2
->ts
.type
== BT_CLASS
11371 && code
->expr1
->ts
.type
== BT_CLASS
11372 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11373 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11374 && code
->expr2
->expr_type
== EXPR_VARIABLE
11375 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11377 code
->op
= EXEC_ASSIGN
;
11381 case EXEC_ARITHMETIC_IF
:
11383 gfc_expr
*e
= code
->expr1
;
11385 gfc_resolve_expr (e
);
11386 if (e
->expr_type
== EXPR_NULL
)
11387 gfc_error ("Invalid NULL at %L", &e
->where
);
11389 if (t
&& (e
->rank
> 0
11390 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11391 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11392 "REAL or INTEGER expression", &e
->where
);
11394 resolve_branch (code
->label1
, code
);
11395 resolve_branch (code
->label2
, code
);
11396 resolve_branch (code
->label3
, code
);
11401 if (t
&& code
->expr1
!= NULL
11402 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11403 || code
->expr1
->rank
!= 0))
11404 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11405 &code
->expr1
->where
);
11410 resolve_call (code
);
11413 case EXEC_COMPCALL
:
11415 resolve_typebound_subroutine (code
);
11418 case EXEC_CALL_PPC
:
11419 resolve_ppc_call (code
);
11423 /* Select is complicated. Also, a SELECT construct could be
11424 a transformed computed GOTO. */
11425 resolve_select (code
, false);
11428 case EXEC_SELECT_TYPE
:
11429 resolve_select_type (code
, ns
);
11433 resolve_block_construct (code
);
11437 if (code
->ext
.iterator
!= NULL
)
11439 gfc_iterator
*iter
= code
->ext
.iterator
;
11440 if (gfc_resolve_iterator (iter
, true, false))
11441 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11446 case EXEC_DO_WHILE
:
11447 if (code
->expr1
== NULL
)
11448 gfc_internal_error ("gfc_resolve_code(): No expression on "
11451 && (code
->expr1
->rank
!= 0
11452 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11453 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11454 "a scalar LOGICAL expression", &code
->expr1
->where
);
11457 case EXEC_ALLOCATE
:
11459 resolve_allocate_deallocate (code
, "ALLOCATE");
11463 case EXEC_DEALLOCATE
:
11465 resolve_allocate_deallocate (code
, "DEALLOCATE");
11470 if (!gfc_resolve_open (code
->ext
.open
))
11473 resolve_branch (code
->ext
.open
->err
, code
);
11477 if (!gfc_resolve_close (code
->ext
.close
))
11480 resolve_branch (code
->ext
.close
->err
, code
);
11483 case EXEC_BACKSPACE
:
11487 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11490 resolve_branch (code
->ext
.filepos
->err
, code
);
11494 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11497 resolve_branch (code
->ext
.inquire
->err
, code
);
11500 case EXEC_IOLENGTH
:
11501 gcc_assert (code
->ext
.inquire
!= NULL
);
11502 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11505 resolve_branch (code
->ext
.inquire
->err
, code
);
11509 if (!gfc_resolve_wait (code
->ext
.wait
))
11512 resolve_branch (code
->ext
.wait
->err
, code
);
11513 resolve_branch (code
->ext
.wait
->end
, code
);
11514 resolve_branch (code
->ext
.wait
->eor
, code
);
11519 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11522 resolve_branch (code
->ext
.dt
->err
, code
);
11523 resolve_branch (code
->ext
.dt
->end
, code
);
11524 resolve_branch (code
->ext
.dt
->eor
, code
);
11527 case EXEC_TRANSFER
:
11528 resolve_transfer (code
);
11531 case EXEC_DO_CONCURRENT
:
11533 resolve_forall_iterators (code
->ext
.forall_iterator
);
11535 if (code
->expr1
!= NULL
11536 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11537 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11538 "expression", &code
->expr1
->where
);
11541 case EXEC_OACC_PARALLEL_LOOP
:
11542 case EXEC_OACC_PARALLEL
:
11543 case EXEC_OACC_KERNELS_LOOP
:
11544 case EXEC_OACC_KERNELS
:
11545 case EXEC_OACC_DATA
:
11546 case EXEC_OACC_HOST_DATA
:
11547 case EXEC_OACC_LOOP
:
11548 case EXEC_OACC_UPDATE
:
11549 case EXEC_OACC_WAIT
:
11550 case EXEC_OACC_CACHE
:
11551 case EXEC_OACC_ENTER_DATA
:
11552 case EXEC_OACC_EXIT_DATA
:
11553 case EXEC_OACC_ATOMIC
:
11554 case EXEC_OACC_DECLARE
:
11555 gfc_resolve_oacc_directive (code
, ns
);
11558 case EXEC_OMP_ATOMIC
:
11559 case EXEC_OMP_BARRIER
:
11560 case EXEC_OMP_CANCEL
:
11561 case EXEC_OMP_CANCELLATION_POINT
:
11562 case EXEC_OMP_CRITICAL
:
11563 case EXEC_OMP_FLUSH
:
11564 case EXEC_OMP_DISTRIBUTE
:
11565 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11566 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11567 case EXEC_OMP_DISTRIBUTE_SIMD
:
11569 case EXEC_OMP_DO_SIMD
:
11570 case EXEC_OMP_MASTER
:
11571 case EXEC_OMP_ORDERED
:
11572 case EXEC_OMP_SECTIONS
:
11573 case EXEC_OMP_SIMD
:
11574 case EXEC_OMP_SINGLE
:
11575 case EXEC_OMP_TARGET
:
11576 case EXEC_OMP_TARGET_DATA
:
11577 case EXEC_OMP_TARGET_ENTER_DATA
:
11578 case EXEC_OMP_TARGET_EXIT_DATA
:
11579 case EXEC_OMP_TARGET_PARALLEL
:
11580 case EXEC_OMP_TARGET_PARALLEL_DO
:
11581 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11582 case EXEC_OMP_TARGET_SIMD
:
11583 case EXEC_OMP_TARGET_TEAMS
:
11584 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11585 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11586 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11587 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11588 case EXEC_OMP_TARGET_UPDATE
:
11589 case EXEC_OMP_TASK
:
11590 case EXEC_OMP_TASKGROUP
:
11591 case EXEC_OMP_TASKLOOP
:
11592 case EXEC_OMP_TASKLOOP_SIMD
:
11593 case EXEC_OMP_TASKWAIT
:
11594 case EXEC_OMP_TASKYIELD
:
11595 case EXEC_OMP_TEAMS
:
11596 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11597 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11598 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11599 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11600 case EXEC_OMP_WORKSHARE
:
11601 gfc_resolve_omp_directive (code
, ns
);
11604 case EXEC_OMP_PARALLEL
:
11605 case EXEC_OMP_PARALLEL_DO
:
11606 case EXEC_OMP_PARALLEL_DO_SIMD
:
11607 case EXEC_OMP_PARALLEL_SECTIONS
:
11608 case EXEC_OMP_PARALLEL_WORKSHARE
:
11609 omp_workshare_save
= omp_workshare_flag
;
11610 omp_workshare_flag
= 0;
11611 gfc_resolve_omp_directive (code
, ns
);
11612 omp_workshare_flag
= omp_workshare_save
;
11616 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11620 cs_base
= frame
.prev
;
11624 /* Resolve initial values and make sure they are compatible with
11628 resolve_values (gfc_symbol
*sym
)
11632 if (sym
->value
== NULL
)
11635 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11636 t
= resolve_structure_cons (sym
->value
, 1);
11638 t
= gfc_resolve_expr (sym
->value
);
11643 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11647 /* Verify any BIND(C) derived types in the namespace so we can report errors
11648 for them once, rather than for each variable declared of that type. */
11651 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11653 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11654 && derived_sym
->attr
.is_bind_c
== 1)
11655 verify_bind_c_derived_type (derived_sym
);
11661 /* Check the interfaces of DTIO procedures associated with derived
11662 type 'sym'. These procedures can either have typebound bindings or
11663 can appear in DTIO generic interfaces. */
11666 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11668 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11671 gfc_check_dtio_interfaces (sym
);
11676 /* Verify that any binding labels used in a given namespace do not collide
11677 with the names or binding labels of any global symbols. Multiple INTERFACE
11678 for the same procedure are permitted. */
11681 gfc_verify_binding_labels (gfc_symbol
*sym
)
11684 const char *module
;
11686 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11687 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11690 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11693 module
= sym
->module
;
11694 else if (sym
->ns
&& sym
->ns
->proc_name
11695 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11696 module
= sym
->ns
->proc_name
->name
;
11697 else if (sym
->ns
&& sym
->ns
->parent
11698 && sym
->ns
&& sym
->ns
->parent
->proc_name
11699 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11700 module
= sym
->ns
->parent
->proc_name
->name
;
11706 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11709 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11710 gsym
->where
= sym
->declared_at
;
11711 gsym
->sym_name
= sym
->name
;
11712 gsym
->binding_label
= sym
->binding_label
;
11713 gsym
->ns
= sym
->ns
;
11714 gsym
->mod_name
= module
;
11715 if (sym
->attr
.function
)
11716 gsym
->type
= GSYM_FUNCTION
;
11717 else if (sym
->attr
.subroutine
)
11718 gsym
->type
= GSYM_SUBROUTINE
;
11719 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11720 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11724 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11726 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11727 "identifier as entity at %L", sym
->name
,
11728 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11729 /* Clear the binding label to prevent checking multiple times. */
11730 sym
->binding_label
= NULL
;
11733 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11734 && (strcmp (module
, gsym
->mod_name
) != 0
11735 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11737 /* This can only happen if the variable is defined in a module - if it
11738 isn't the same module, reject it. */
11739 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11740 "uses the same global identifier as entity at %L from module %qs",
11741 sym
->name
, module
, sym
->binding_label
,
11742 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11743 sym
->binding_label
= NULL
;
11745 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11746 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11747 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11748 && sym
!= gsym
->ns
->proc_name
11749 && (module
!= gsym
->mod_name
11750 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11751 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11753 /* Print an error if the procedure is defined multiple times; we have to
11754 exclude references to the same procedure via module association or
11755 multiple checks for the same procedure. */
11756 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11757 "global identifier as entity at %L", sym
->name
,
11758 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11759 sym
->binding_label
= NULL
;
11764 /* Resolve an index expression. */
11767 resolve_index_expr (gfc_expr
*e
)
11769 if (!gfc_resolve_expr (e
))
11772 if (!gfc_simplify_expr (e
, 0))
11775 if (!gfc_specification_expr (e
))
11782 /* Resolve a charlen structure. */
11785 resolve_charlen (gfc_charlen
*cl
)
11788 bool saved_specification_expr
;
11794 saved_specification_expr
= specification_expr
;
11795 specification_expr
= true;
11797 if (cl
->length_from_typespec
)
11799 if (!gfc_resolve_expr (cl
->length
))
11801 specification_expr
= saved_specification_expr
;
11805 if (!gfc_simplify_expr (cl
->length
, 0))
11807 specification_expr
= saved_specification_expr
;
11811 /* cl->length has been resolved. It should have an integer type. */
11812 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11814 gfc_error ("Scalar INTEGER expression expected at %L",
11815 &cl
->length
->where
);
11821 if (!resolve_index_expr (cl
->length
))
11823 specification_expr
= saved_specification_expr
;
11828 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11829 a negative value, the length of character entities declared is zero. */
11830 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11831 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11832 gfc_replace_expr (cl
->length
,
11833 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11835 /* Check that the character length is not too large. */
11836 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11837 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11838 && cl
->length
->ts
.type
== BT_INTEGER
11839 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11841 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11842 specification_expr
= saved_specification_expr
;
11846 specification_expr
= saved_specification_expr
;
11851 /* Test for non-constant shape arrays. */
11854 is_non_constant_shape_array (gfc_symbol
*sym
)
11860 not_constant
= false;
11861 if (sym
->as
!= NULL
)
11863 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11864 has not been simplified; parameter array references. Do the
11865 simplification now. */
11866 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11868 e
= sym
->as
->lower
[i
];
11869 if (e
&& (!resolve_index_expr(e
)
11870 || !gfc_is_constant_expr (e
)))
11871 not_constant
= true;
11872 e
= sym
->as
->upper
[i
];
11873 if (e
&& (!resolve_index_expr(e
)
11874 || !gfc_is_constant_expr (e
)))
11875 not_constant
= true;
11878 return not_constant
;
11881 /* Given a symbol and an initialization expression, add code to initialize
11882 the symbol to the function entry. */
11884 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11888 gfc_namespace
*ns
= sym
->ns
;
11890 /* Search for the function namespace if this is a contained
11891 function without an explicit result. */
11892 if (sym
->attr
.function
&& sym
== sym
->result
11893 && sym
->name
!= sym
->ns
->proc_name
->name
)
11895 ns
= ns
->contained
;
11896 for (;ns
; ns
= ns
->sibling
)
11897 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11903 gfc_free_expr (init
);
11907 /* Build an l-value expression for the result. */
11908 lval
= gfc_lval_expr_from_sym (sym
);
11910 /* Add the code at scope entry. */
11911 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11912 init_st
->next
= ns
->code
;
11913 ns
->code
= init_st
;
11915 /* Assign the default initializer to the l-value. */
11916 init_st
->loc
= sym
->declared_at
;
11917 init_st
->expr1
= lval
;
11918 init_st
->expr2
= init
;
11922 /* Whether or not we can generate a default initializer for a symbol. */
11925 can_generate_init (gfc_symbol
*sym
)
11927 symbol_attribute
*a
;
11932 /* These symbols should never have a default initialization. */
11937 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11938 && (CLASS_DATA (sym
)->attr
.class_pointer
11939 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11940 || a
->in_equivalence
11947 || (!a
->referenced
&& !a
->result
)
11948 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11949 || (a
->function
&& sym
!= sym
->result
)
11954 /* Assign the default initializer to a derived type variable or result. */
11957 apply_default_init (gfc_symbol
*sym
)
11959 gfc_expr
*init
= NULL
;
11961 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11964 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11965 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11967 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11970 build_init_assign (sym
, init
);
11971 sym
->attr
.referenced
= 1;
11975 /* Build an initializer for a local. Returns null if the symbol should not have
11976 a default initialization. */
11979 build_default_init_expr (gfc_symbol
*sym
)
11981 /* These symbols should never have a default initialization. */
11982 if (sym
->attr
.allocatable
11983 || sym
->attr
.external
11985 || sym
->attr
.pointer
11986 || sym
->attr
.in_equivalence
11987 || sym
->attr
.in_common
11990 || sym
->attr
.cray_pointee
11991 || sym
->attr
.cray_pointer
11995 /* Get the appropriate init expression. */
11996 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11999 /* Add an initialization expression to a local variable. */
12001 apply_default_init_local (gfc_symbol
*sym
)
12003 gfc_expr
*init
= NULL
;
12005 /* The symbol should be a variable or a function return value. */
12006 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12007 || (sym
->attr
.function
&& sym
->result
!= sym
))
12010 /* Try to build the initializer expression. If we can't initialize
12011 this symbol, then init will be NULL. */
12012 init
= build_default_init_expr (sym
);
12016 /* For saved variables, we don't want to add an initializer at function
12017 entry, so we just add a static initializer. Note that automatic variables
12018 are stack allocated even with -fno-automatic; we have also to exclude
12019 result variable, which are also nonstatic. */
12020 if (!sym
->attr
.automatic
12021 && (sym
->attr
.save
|| sym
->ns
->save_all
12022 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12023 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12024 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12026 /* Don't clobber an existing initializer! */
12027 gcc_assert (sym
->value
== NULL
);
12032 build_init_assign (sym
, init
);
12036 /* Resolution of common features of flavors variable and procedure. */
12039 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12041 gfc_array_spec
*as
;
12043 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12044 as
= CLASS_DATA (sym
)->as
;
12048 /* Constraints on deferred shape variable. */
12049 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12051 bool pointer
, allocatable
, dimension
;
12053 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12055 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12056 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12057 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12061 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12062 allocatable
= sym
->attr
.allocatable
;
12063 dimension
= sym
->attr
.dimension
;
12068 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12070 gfc_error ("Allocatable array %qs at %L must have a deferred "
12071 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12074 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12075 "%qs at %L may not be ALLOCATABLE",
12076 sym
->name
, &sym
->declared_at
))
12080 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12082 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12083 "assumed rank", sym
->name
, &sym
->declared_at
);
12089 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12090 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12092 gfc_error ("Array %qs at %L cannot have a deferred shape",
12093 sym
->name
, &sym
->declared_at
);
12098 /* Constraints on polymorphic variables. */
12099 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12102 if (sym
->attr
.class_ok
12103 && !sym
->attr
.select_type_temporary
12104 && !UNLIMITED_POLY (sym
)
12105 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12107 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12108 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12109 &sym
->declared_at
);
12114 /* Assume that use associated symbols were checked in the module ns.
12115 Class-variables that are associate-names are also something special
12116 and excepted from the test. */
12117 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12119 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12120 "or pointer", sym
->name
, &sym
->declared_at
);
12129 /* Additional checks for symbols with flavor variable and derived
12130 type. To be called from resolve_fl_variable. */
12133 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12135 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12137 /* Check to see if a derived type is blocked from being host
12138 associated by the presence of another class I symbol in the same
12139 namespace. 14.6.1.3 of the standard and the discussion on
12140 comp.lang.fortran. */
12141 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12142 && !sym
->ts
.u
.derived
->attr
.use_assoc
12143 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12146 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12147 if (s
&& s
->attr
.generic
)
12148 s
= gfc_find_dt_in_generic (s
);
12149 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12151 gfc_error ("The type %qs cannot be host associated at %L "
12152 "because it is blocked by an incompatible object "
12153 "of the same name declared at %L",
12154 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12160 /* 4th constraint in section 11.3: "If an object of a type for which
12161 component-initialization is specified (R429) appears in the
12162 specification-part of a module and does not have the ALLOCATABLE
12163 or POINTER attribute, the object shall have the SAVE attribute."
12165 The check for initializers is performed with
12166 gfc_has_default_initializer because gfc_default_initializer generates
12167 a hidden default for allocatable components. */
12168 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12169 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12170 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12171 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12172 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12173 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12174 "%qs at %L, needed due to the default "
12175 "initialization", sym
->name
, &sym
->declared_at
))
12178 /* Assign default initializer. */
12179 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12180 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12181 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12187 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12188 except in the declaration of an entity or component that has the POINTER
12189 or ALLOCATABLE attribute. */
12192 deferred_requirements (gfc_symbol
*sym
)
12194 if (sym
->ts
.deferred
12195 && !(sym
->attr
.pointer
12196 || sym
->attr
.allocatable
12197 || sym
->attr
.associate_var
12198 || sym
->attr
.omp_udr_artificial_var
))
12200 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12201 "requires either the POINTER or ALLOCATABLE attribute",
12202 sym
->name
, &sym
->declared_at
);
12209 /* Resolve symbols with flavor variable. */
12212 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12214 int no_init_flag
, automatic_flag
;
12216 const char *auto_save_msg
;
12217 bool saved_specification_expr
;
12219 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12222 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12225 /* Set this flag to check that variables are parameters of all entries.
12226 This check is effected by the call to gfc_resolve_expr through
12227 is_non_constant_shape_array. */
12228 saved_specification_expr
= specification_expr
;
12229 specification_expr
= true;
12231 if (sym
->ns
->proc_name
12232 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12233 || sym
->ns
->proc_name
->attr
.is_main_program
)
12234 && !sym
->attr
.use_assoc
12235 && !sym
->attr
.allocatable
12236 && !sym
->attr
.pointer
12237 && is_non_constant_shape_array (sym
))
12239 /* F08:C541. The shape of an array defined in a main program or module
12240 * needs to be constant. */
12241 gfc_error ("The module or main program array %qs at %L must "
12242 "have constant shape", sym
->name
, &sym
->declared_at
);
12243 specification_expr
= saved_specification_expr
;
12247 /* Constraints on deferred type parameter. */
12248 if (!deferred_requirements (sym
))
12251 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12253 /* Make sure that character string variables with assumed length are
12254 dummy arguments. */
12255 e
= sym
->ts
.u
.cl
->length
;
12256 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12257 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12258 && !sym
->attr
.omp_udr_artificial_var
)
12260 gfc_error ("Entity with assumed character length at %L must be a "
12261 "dummy argument or a PARAMETER", &sym
->declared_at
);
12262 specification_expr
= saved_specification_expr
;
12266 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12268 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12269 specification_expr
= saved_specification_expr
;
12273 if (!gfc_is_constant_expr (e
)
12274 && !(e
->expr_type
== EXPR_VARIABLE
12275 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12277 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12278 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12279 || sym
->ns
->proc_name
->attr
.is_main_program
))
12281 gfc_error ("%qs at %L must have constant character length "
12282 "in this context", sym
->name
, &sym
->declared_at
);
12283 specification_expr
= saved_specification_expr
;
12286 if (sym
->attr
.in_common
)
12288 gfc_error ("COMMON variable %qs at %L must have constant "
12289 "character length", sym
->name
, &sym
->declared_at
);
12290 specification_expr
= saved_specification_expr
;
12296 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12297 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12299 /* Determine if the symbol may not have an initializer. */
12300 no_init_flag
= automatic_flag
= 0;
12301 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12302 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12304 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12305 && is_non_constant_shape_array (sym
))
12307 no_init_flag
= automatic_flag
= 1;
12309 /* Also, they must not have the SAVE attribute.
12310 SAVE_IMPLICIT is checked below. */
12311 if (sym
->as
&& sym
->attr
.codimension
)
12313 int corank
= sym
->as
->corank
;
12314 sym
->as
->corank
= 0;
12315 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12316 sym
->as
->corank
= corank
;
12318 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12320 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12321 specification_expr
= saved_specification_expr
;
12326 /* Ensure that any initializer is simplified. */
12328 gfc_simplify_expr (sym
->value
, 1);
12330 /* Reject illegal initializers. */
12331 if (!sym
->mark
&& sym
->value
)
12333 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12334 && CLASS_DATA (sym
)->attr
.allocatable
))
12335 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12336 sym
->name
, &sym
->declared_at
);
12337 else if (sym
->attr
.external
)
12338 gfc_error ("External %qs at %L cannot have an initializer",
12339 sym
->name
, &sym
->declared_at
);
12340 else if (sym
->attr
.dummy
12341 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12342 gfc_error ("Dummy %qs at %L cannot have an initializer",
12343 sym
->name
, &sym
->declared_at
);
12344 else if (sym
->attr
.intrinsic
)
12345 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12346 sym
->name
, &sym
->declared_at
);
12347 else if (sym
->attr
.result
)
12348 gfc_error ("Function result %qs at %L cannot have an initializer",
12349 sym
->name
, &sym
->declared_at
);
12350 else if (automatic_flag
)
12351 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12352 sym
->name
, &sym
->declared_at
);
12354 goto no_init_error
;
12355 specification_expr
= saved_specification_expr
;
12360 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12362 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12363 specification_expr
= saved_specification_expr
;
12367 specification_expr
= saved_specification_expr
;
12372 /* Compare the dummy characteristics of a module procedure interface
12373 declaration with the corresponding declaration in a submodule. */
12374 static gfc_formal_arglist
*new_formal
;
12375 static char errmsg
[200];
12378 compare_fsyms (gfc_symbol
*sym
)
12382 if (sym
== NULL
|| new_formal
== NULL
)
12385 fsym
= new_formal
->sym
;
12390 if (strcmp (sym
->name
, fsym
->name
) == 0)
12392 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12393 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12398 /* Resolve a procedure. */
12401 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12403 gfc_formal_arglist
*arg
;
12405 if (sym
->attr
.function
12406 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12409 if (sym
->ts
.type
== BT_CHARACTER
)
12411 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12413 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12414 && !resolve_charlen (cl
))
12417 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12418 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12420 gfc_error ("Character-valued statement function %qs at %L must "
12421 "have constant length", sym
->name
, &sym
->declared_at
);
12426 /* Ensure that derived type for are not of a private type. Internal
12427 module procedures are excluded by 2.2.3.3 - i.e., they are not
12428 externally accessible and can access all the objects accessible in
12430 if (!(sym
->ns
->parent
12431 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12432 && gfc_check_symbol_access (sym
))
12434 gfc_interface
*iface
;
12436 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12439 && arg
->sym
->ts
.type
== BT_DERIVED
12440 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12441 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12442 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12443 "and cannot be a dummy argument"
12444 " of %qs, which is PUBLIC at %L",
12445 arg
->sym
->name
, sym
->name
,
12446 &sym
->declared_at
))
12448 /* Stop this message from recurring. */
12449 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12454 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12455 PRIVATE to the containing module. */
12456 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12458 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12461 && arg
->sym
->ts
.type
== BT_DERIVED
12462 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12463 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12464 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12465 "PUBLIC interface %qs at %L "
12466 "takes dummy arguments of %qs which "
12467 "is PRIVATE", iface
->sym
->name
,
12468 sym
->name
, &iface
->sym
->declared_at
,
12469 gfc_typename(&arg
->sym
->ts
)))
12471 /* Stop this message from recurring. */
12472 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12479 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12480 && !sym
->attr
.proc_pointer
)
12482 gfc_error ("Function %qs at %L cannot have an initializer",
12483 sym
->name
, &sym
->declared_at
);
12487 /* An external symbol may not have an initializer because it is taken to be
12488 a procedure. Exception: Procedure Pointers. */
12489 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12491 gfc_error ("External object %qs at %L may not have an initializer",
12492 sym
->name
, &sym
->declared_at
);
12496 /* An elemental function is required to return a scalar 12.7.1 */
12497 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12499 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12500 "result", sym
->name
, &sym
->declared_at
);
12501 /* Reset so that the error only occurs once. */
12502 sym
->attr
.elemental
= 0;
12506 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12507 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12509 gfc_error ("Statement function %qs at %L may not have pointer or "
12510 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12514 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12515 char-len-param shall not be array-valued, pointer-valued, recursive
12516 or pure. ....snip... A character value of * may only be used in the
12517 following ways: (i) Dummy arg of procedure - dummy associates with
12518 actual length; (ii) To declare a named constant; or (iii) External
12519 function - but length must be declared in calling scoping unit. */
12520 if (sym
->attr
.function
12521 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12522 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12524 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12525 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12527 if (sym
->as
&& sym
->as
->rank
)
12528 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12529 "array-valued", sym
->name
, &sym
->declared_at
);
12531 if (sym
->attr
.pointer
)
12532 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12533 "pointer-valued", sym
->name
, &sym
->declared_at
);
12535 if (sym
->attr
.pure
)
12536 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12537 "pure", sym
->name
, &sym
->declared_at
);
12539 if (sym
->attr
.recursive
)
12540 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12541 "recursive", sym
->name
, &sym
->declared_at
);
12546 /* Appendix B.2 of the standard. Contained functions give an
12547 error anyway. Deferred character length is an F2003 feature.
12548 Don't warn on intrinsic conversion functions, which start
12549 with two underscores. */
12550 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12551 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12552 gfc_notify_std (GFC_STD_F95_OBS
,
12553 "CHARACTER(*) function %qs at %L",
12554 sym
->name
, &sym
->declared_at
);
12557 /* F2008, C1218. */
12558 if (sym
->attr
.elemental
)
12560 if (sym
->attr
.proc_pointer
)
12562 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12563 sym
->name
, &sym
->declared_at
);
12566 if (sym
->attr
.dummy
)
12568 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12569 sym
->name
, &sym
->declared_at
);
12574 /* F2018, C15100: "The result of an elemental function shall be scalar,
12575 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12576 pointer is tested and caught elsewhere. */
12577 if (sym
->attr
.elemental
&& sym
->result
12578 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12580 gfc_error ("Function result variable %qs at %L of elemental "
12581 "function %qs shall not have an ALLOCATABLE or POINTER "
12582 "attribute", sym
->result
->name
,
12583 &sym
->result
->declared_at
, sym
->name
);
12587 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12589 gfc_formal_arglist
*curr_arg
;
12590 int has_non_interop_arg
= 0;
12592 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12593 sym
->common_block
))
12595 /* Clear these to prevent looking at them again if there was an
12597 sym
->attr
.is_bind_c
= 0;
12598 sym
->attr
.is_c_interop
= 0;
12599 sym
->ts
.is_c_interop
= 0;
12603 /* So far, no errors have been found. */
12604 sym
->attr
.is_c_interop
= 1;
12605 sym
->ts
.is_c_interop
= 1;
12608 curr_arg
= gfc_sym_get_dummy_args (sym
);
12609 while (curr_arg
!= NULL
)
12611 /* Skip implicitly typed dummy args here. */
12612 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12613 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12614 /* If something is found to fail, record the fact so we
12615 can mark the symbol for the procedure as not being
12616 BIND(C) to try and prevent multiple errors being
12618 has_non_interop_arg
= 1;
12620 curr_arg
= curr_arg
->next
;
12623 /* See if any of the arguments were not interoperable and if so, clear
12624 the procedure symbol to prevent duplicate error messages. */
12625 if (has_non_interop_arg
!= 0)
12627 sym
->attr
.is_c_interop
= 0;
12628 sym
->ts
.is_c_interop
= 0;
12629 sym
->attr
.is_bind_c
= 0;
12633 if (!sym
->attr
.proc_pointer
)
12635 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12637 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12638 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12641 if (sym
->attr
.intent
)
12643 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12644 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12647 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12649 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12650 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12653 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12654 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12655 || sym
->attr
.contained
))
12657 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12658 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12661 if (strcmp ("ppr@", sym
->name
) == 0)
12663 gfc_error ("Procedure pointer result %qs at %L "
12664 "is missing the pointer attribute",
12665 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12670 /* Assume that a procedure whose body is not known has references
12671 to external arrays. */
12672 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12673 sym
->attr
.array_outer_dependency
= 1;
12675 /* Compare the characteristics of a module procedure with the
12676 interface declaration. Ideally this would be done with
12677 gfc_compare_interfaces but, at present, the formal interface
12678 cannot be copied to the ts.interface. */
12679 if (sym
->attr
.module_procedure
12680 && sym
->attr
.if_source
== IFSRC_DECL
)
12683 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12685 char *submodule_name
;
12686 strcpy (name
, sym
->ns
->proc_name
->name
);
12687 module_name
= strtok (name
, ".");
12688 submodule_name
= strtok (NULL
, ".");
12690 iface
= sym
->tlink
;
12693 /* Make sure that the result uses the correct charlen for deferred
12695 if (iface
&& sym
->result
12696 && iface
->ts
.type
== BT_CHARACTER
12697 && iface
->ts
.deferred
)
12698 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12703 /* Check the procedure characteristics. */
12704 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12706 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12707 "PROCEDURE at %L and its interface in %s",
12708 &sym
->declared_at
, module_name
);
12712 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12714 gfc_error ("Mismatch in PURE attribute between MODULE "
12715 "PROCEDURE at %L and its interface in %s",
12716 &sym
->declared_at
, module_name
);
12720 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12722 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12723 "PROCEDURE at %L and its interface in %s",
12724 &sym
->declared_at
, module_name
);
12728 /* Check the result characteristics. */
12729 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12731 gfc_error ("%s between the MODULE PROCEDURE declaration "
12732 "in MODULE %qs and the declaration at %L in "
12734 errmsg
, module_name
, &sym
->declared_at
,
12735 submodule_name
? submodule_name
: module_name
);
12740 /* Check the characteristics of the formal arguments. */
12741 if (sym
->formal
&& sym
->formal_ns
)
12743 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12746 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12754 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12755 been defined and we now know their defined arguments, check that they fulfill
12756 the requirements of the standard for procedures used as finalizers. */
12759 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12761 gfc_finalizer
* list
;
12762 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12763 bool result
= true;
12764 bool seen_scalar
= false;
12767 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12770 gfc_resolve_finalizers (parent
, finalizable
);
12772 /* Ensure that derived-type components have a their finalizers resolved. */
12773 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12774 for (c
= derived
->components
; c
; c
= c
->next
)
12775 if (c
->ts
.type
== BT_DERIVED
12776 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12778 bool has_final2
= false;
12779 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12780 return false; /* Error. */
12781 has_final
= has_final
|| has_final2
;
12783 /* Return early if not finalizable. */
12787 *finalizable
= false;
12791 /* Walk over the list of finalizer-procedures, check them, and if any one
12792 does not fit in with the standard's definition, print an error and remove
12793 it from the list. */
12794 prev_link
= &derived
->f2k_derived
->finalizers
;
12795 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12797 gfc_formal_arglist
*dummy_args
;
12802 /* Skip this finalizer if we already resolved it. */
12803 if (list
->proc_tree
)
12805 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12806 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12807 seen_scalar
= true;
12808 prev_link
= &(list
->next
);
12812 /* Check this exists and is a SUBROUTINE. */
12813 if (!list
->proc_sym
->attr
.subroutine
)
12815 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12816 list
->proc_sym
->name
, &list
->where
);
12820 /* We should have exactly one argument. */
12821 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12822 if (!dummy_args
|| dummy_args
->next
)
12824 gfc_error ("FINAL procedure at %L must have exactly one argument",
12828 arg
= dummy_args
->sym
;
12830 /* This argument must be of our type. */
12831 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12833 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12834 &arg
->declared_at
, derived
->name
);
12838 /* It must neither be a pointer nor allocatable nor optional. */
12839 if (arg
->attr
.pointer
)
12841 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12842 &arg
->declared_at
);
12845 if (arg
->attr
.allocatable
)
12847 gfc_error ("Argument of FINAL procedure at %L must not be"
12848 " ALLOCATABLE", &arg
->declared_at
);
12851 if (arg
->attr
.optional
)
12853 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12854 &arg
->declared_at
);
12858 /* It must not be INTENT(OUT). */
12859 if (arg
->attr
.intent
== INTENT_OUT
)
12861 gfc_error ("Argument of FINAL procedure at %L must not be"
12862 " INTENT(OUT)", &arg
->declared_at
);
12866 /* Warn if the procedure is non-scalar and not assumed shape. */
12867 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12868 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12869 gfc_warning (OPT_Wsurprising
,
12870 "Non-scalar FINAL procedure at %L should have assumed"
12871 " shape argument", &arg
->declared_at
);
12873 /* Check that it does not match in kind and rank with a FINAL procedure
12874 defined earlier. To really loop over the *earlier* declarations,
12875 we need to walk the tail of the list as new ones were pushed at the
12877 /* TODO: Handle kind parameters once they are implemented. */
12878 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12879 for (i
= list
->next
; i
; i
= i
->next
)
12881 gfc_formal_arglist
*dummy_args
;
12883 /* Argument list might be empty; that is an error signalled earlier,
12884 but we nevertheless continued resolving. */
12885 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12888 gfc_symbol
* i_arg
= dummy_args
->sym
;
12889 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12890 if (i_rank
== my_rank
)
12892 gfc_error ("FINAL procedure %qs declared at %L has the same"
12893 " rank (%d) as %qs",
12894 list
->proc_sym
->name
, &list
->where
, my_rank
,
12895 i
->proc_sym
->name
);
12901 /* Is this the/a scalar finalizer procedure? */
12903 seen_scalar
= true;
12905 /* Find the symtree for this procedure. */
12906 gcc_assert (!list
->proc_tree
);
12907 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12909 prev_link
= &list
->next
;
12912 /* Remove wrong nodes immediately from the list so we don't risk any
12913 troubles in the future when they might fail later expectations. */
12916 *prev_link
= list
->next
;
12917 gfc_free_finalizer (i
);
12921 if (result
== false)
12924 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12925 were nodes in the list, must have been for arrays. It is surely a good
12926 idea to have a scalar version there if there's something to finalize. */
12927 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12928 gfc_warning (OPT_Wsurprising
,
12929 "Only array FINAL procedures declared for derived type %qs"
12930 " defined at %L, suggest also scalar one",
12931 derived
->name
, &derived
->declared_at
);
12933 vtab
= gfc_find_derived_vtab (derived
);
12934 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12935 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12938 *finalizable
= true;
12944 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12947 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12948 const char* generic_name
, locus where
)
12950 gfc_symbol
*sym1
, *sym2
;
12951 const char *pass1
, *pass2
;
12952 gfc_formal_arglist
*dummy_args
;
12954 gcc_assert (t1
->specific
&& t2
->specific
);
12955 gcc_assert (!t1
->specific
->is_generic
);
12956 gcc_assert (!t2
->specific
->is_generic
);
12957 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12959 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12960 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12965 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12966 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12967 || sym1
->attr
.function
!= sym2
->attr
.function
)
12969 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12970 " GENERIC %qs at %L",
12971 sym1
->name
, sym2
->name
, generic_name
, &where
);
12975 /* Determine PASS arguments. */
12976 if (t1
->specific
->nopass
)
12978 else if (t1
->specific
->pass_arg
)
12979 pass1
= t1
->specific
->pass_arg
;
12982 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12984 pass1
= dummy_args
->sym
->name
;
12988 if (t2
->specific
->nopass
)
12990 else if (t2
->specific
->pass_arg
)
12991 pass2
= t2
->specific
->pass_arg
;
12994 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12996 pass2
= dummy_args
->sym
->name
;
13001 /* Compare the interfaces. */
13002 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13003 NULL
, 0, pass1
, pass2
))
13005 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13006 sym1
->name
, sym2
->name
, generic_name
, &where
);
13014 /* Worker function for resolving a generic procedure binding; this is used to
13015 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13017 The difference between those cases is finding possible inherited bindings
13018 that are overridden, as one has to look for them in tb_sym_root,
13019 tb_uop_root or tb_op, respectively. Thus the caller must already find
13020 the super-type and set p->overridden correctly. */
13023 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13024 gfc_typebound_proc
* p
, const char* name
)
13026 gfc_tbp_generic
* target
;
13027 gfc_symtree
* first_target
;
13028 gfc_symtree
* inherited
;
13030 gcc_assert (p
&& p
->is_generic
);
13032 /* Try to find the specific bindings for the symtrees in our target-list. */
13033 gcc_assert (p
->u
.generic
);
13034 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13035 if (!target
->specific
)
13037 gfc_typebound_proc
* overridden_tbp
;
13038 gfc_tbp_generic
* g
;
13039 const char* target_name
;
13041 target_name
= target
->specific_st
->name
;
13043 /* Defined for this type directly. */
13044 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13046 target
->specific
= target
->specific_st
->n
.tb
;
13047 goto specific_found
;
13050 /* Look for an inherited specific binding. */
13053 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13058 gcc_assert (inherited
->n
.tb
);
13059 target
->specific
= inherited
->n
.tb
;
13060 goto specific_found
;
13064 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13065 " at %L", target_name
, name
, &p
->where
);
13068 /* Once we've found the specific binding, check it is not ambiguous with
13069 other specifics already found or inherited for the same GENERIC. */
13071 gcc_assert (target
->specific
);
13073 /* This must really be a specific binding! */
13074 if (target
->specific
->is_generic
)
13076 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13077 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13081 /* Check those already resolved on this type directly. */
13082 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13083 if (g
!= target
&& g
->specific
13084 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13087 /* Check for ambiguity with inherited specific targets. */
13088 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13089 overridden_tbp
= overridden_tbp
->overridden
)
13090 if (overridden_tbp
->is_generic
)
13092 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13094 gcc_assert (g
->specific
);
13095 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13101 /* If we attempt to "overwrite" a specific binding, this is an error. */
13102 if (p
->overridden
&& !p
->overridden
->is_generic
)
13104 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13105 " the same name", name
, &p
->where
);
13109 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13110 all must have the same attributes here. */
13111 first_target
= p
->u
.generic
->specific
->u
.specific
;
13112 gcc_assert (first_target
);
13113 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13114 p
->function
= first_target
->n
.sym
->attr
.function
;
13120 /* Resolve a GENERIC procedure binding for a derived type. */
13123 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13125 gfc_symbol
* super_type
;
13127 /* Find the overridden binding if any. */
13128 st
->n
.tb
->overridden
= NULL
;
13129 super_type
= gfc_get_derived_super_type (derived
);
13132 gfc_symtree
* overridden
;
13133 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13136 if (overridden
&& overridden
->n
.tb
)
13137 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13140 /* Resolve using worker function. */
13141 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13145 /* Retrieve the target-procedure of an operator binding and do some checks in
13146 common for intrinsic and user-defined type-bound operators. */
13149 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13151 gfc_symbol
* target_proc
;
13153 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13154 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13155 gcc_assert (target_proc
);
13157 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13158 if (target
->specific
->nopass
)
13160 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13164 return target_proc
;
13168 /* Resolve a type-bound intrinsic operator. */
13171 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13172 gfc_typebound_proc
* p
)
13174 gfc_symbol
* super_type
;
13175 gfc_tbp_generic
* target
;
13177 /* If there's already an error here, do nothing (but don't fail again). */
13181 /* Operators should always be GENERIC bindings. */
13182 gcc_assert (p
->is_generic
);
13184 /* Look for an overridden binding. */
13185 super_type
= gfc_get_derived_super_type (derived
);
13186 if (super_type
&& super_type
->f2k_derived
)
13187 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13190 p
->overridden
= NULL
;
13192 /* Resolve general GENERIC properties using worker function. */
13193 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13196 /* Check the targets to be procedures of correct interface. */
13197 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13199 gfc_symbol
* target_proc
;
13201 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13205 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13208 /* Add target to non-typebound operator list. */
13209 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13210 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13212 gfc_interface
*head
, *intr
;
13214 /* Preempt 'gfc_check_new_interface' for submodules, where the
13215 mechanism for handling module procedures winds up resolving
13216 operator interfaces twice and would otherwise cause an error. */
13217 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13218 if (intr
->sym
== target_proc
13219 && target_proc
->attr
.used_in_submodule
)
13222 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13223 target_proc
, p
->where
))
13225 head
= derived
->ns
->op
[op
];
13226 intr
= gfc_get_interface ();
13227 intr
->sym
= target_proc
;
13228 intr
->where
= p
->where
;
13230 derived
->ns
->op
[op
] = intr
;
13242 /* Resolve a type-bound user operator (tree-walker callback). */
13244 static gfc_symbol
* resolve_bindings_derived
;
13245 static bool resolve_bindings_result
;
13247 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13250 resolve_typebound_user_op (gfc_symtree
* stree
)
13252 gfc_symbol
* super_type
;
13253 gfc_tbp_generic
* target
;
13255 gcc_assert (stree
&& stree
->n
.tb
);
13257 if (stree
->n
.tb
->error
)
13260 /* Operators should always be GENERIC bindings. */
13261 gcc_assert (stree
->n
.tb
->is_generic
);
13263 /* Find overridden procedure, if any. */
13264 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13265 if (super_type
&& super_type
->f2k_derived
)
13267 gfc_symtree
* overridden
;
13268 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13269 stree
->name
, true, NULL
);
13271 if (overridden
&& overridden
->n
.tb
)
13272 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13275 stree
->n
.tb
->overridden
= NULL
;
13277 /* Resolve basically using worker function. */
13278 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13281 /* Check the targets to be functions of correct interface. */
13282 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13284 gfc_symbol
* target_proc
;
13286 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13290 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13297 resolve_bindings_result
= false;
13298 stree
->n
.tb
->error
= 1;
13302 /* Resolve the type-bound procedures for a derived type. */
13305 resolve_typebound_procedure (gfc_symtree
* stree
)
13309 gfc_symbol
* me_arg
;
13310 gfc_symbol
* super_type
;
13311 gfc_component
* comp
;
13313 gcc_assert (stree
);
13315 /* Undefined specific symbol from GENERIC target definition. */
13319 if (stree
->n
.tb
->error
)
13322 /* If this is a GENERIC binding, use that routine. */
13323 if (stree
->n
.tb
->is_generic
)
13325 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13330 /* Get the target-procedure to check it. */
13331 gcc_assert (!stree
->n
.tb
->is_generic
);
13332 gcc_assert (stree
->n
.tb
->u
.specific
);
13333 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13334 where
= stree
->n
.tb
->where
;
13336 /* Default access should already be resolved from the parser. */
13337 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13339 if (stree
->n
.tb
->deferred
)
13341 if (!check_proc_interface (proc
, &where
))
13346 /* Check for F08:C465. */
13347 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13348 || (proc
->attr
.proc
!= PROC_MODULE
13349 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13350 || proc
->attr
.abstract
)
13352 gfc_error ("%qs must be a module procedure or an external procedure with"
13353 " an explicit interface at %L", proc
->name
, &where
);
13358 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13359 stree
->n
.tb
->function
= proc
->attr
.function
;
13361 /* Find the super-type of the current derived type. We could do this once and
13362 store in a global if speed is needed, but as long as not I believe this is
13363 more readable and clearer. */
13364 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13366 /* If PASS, resolve and check arguments if not already resolved / loaded
13367 from a .mod file. */
13368 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13370 gfc_formal_arglist
*dummy_args
;
13372 dummy_args
= gfc_sym_get_dummy_args (proc
);
13373 if (stree
->n
.tb
->pass_arg
)
13375 gfc_formal_arglist
*i
;
13377 /* If an explicit passing argument name is given, walk the arg-list
13378 and look for it. */
13381 stree
->n
.tb
->pass_arg_num
= 1;
13382 for (i
= dummy_args
; i
; i
= i
->next
)
13384 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13389 ++stree
->n
.tb
->pass_arg_num
;
13394 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13396 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13397 stree
->n
.tb
->pass_arg
);
13403 /* Otherwise, take the first one; there should in fact be at least
13405 stree
->n
.tb
->pass_arg_num
= 1;
13408 gfc_error ("Procedure %qs with PASS at %L must have at"
13409 " least one argument", proc
->name
, &where
);
13412 me_arg
= dummy_args
->sym
;
13415 /* Now check that the argument-type matches and the passed-object
13416 dummy argument is generally fine. */
13418 gcc_assert (me_arg
);
13420 if (me_arg
->ts
.type
!= BT_CLASS
)
13422 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13423 " at %L", proc
->name
, &where
);
13427 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13428 != resolve_bindings_derived
)
13430 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13431 " the derived-type %qs", me_arg
->name
, proc
->name
,
13432 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13436 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13437 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13439 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13440 " scalar", proc
->name
, &where
);
13443 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13445 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13446 " be ALLOCATABLE", proc
->name
, &where
);
13449 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13451 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13452 " be POINTER", proc
->name
, &where
);
13457 /* If we are extending some type, check that we don't override a procedure
13458 flagged NON_OVERRIDABLE. */
13459 stree
->n
.tb
->overridden
= NULL
;
13462 gfc_symtree
* overridden
;
13463 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13464 stree
->name
, true, NULL
);
13468 if (overridden
->n
.tb
)
13469 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13471 if (!gfc_check_typebound_override (stree
, overridden
))
13476 /* See if there's a name collision with a component directly in this type. */
13477 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13478 if (!strcmp (comp
->name
, stree
->name
))
13480 gfc_error ("Procedure %qs at %L has the same name as a component of"
13482 stree
->name
, &where
, resolve_bindings_derived
->name
);
13486 /* Try to find a name collision with an inherited component. */
13487 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13490 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13491 " component of %qs",
13492 stree
->name
, &where
, resolve_bindings_derived
->name
);
13496 stree
->n
.tb
->error
= 0;
13500 resolve_bindings_result
= false;
13501 stree
->n
.tb
->error
= 1;
13506 resolve_typebound_procedures (gfc_symbol
* derived
)
13509 gfc_symbol
* super_type
;
13511 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13514 super_type
= gfc_get_derived_super_type (derived
);
13516 resolve_symbol (super_type
);
13518 resolve_bindings_derived
= derived
;
13519 resolve_bindings_result
= true;
13521 if (derived
->f2k_derived
->tb_sym_root
)
13522 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13523 &resolve_typebound_procedure
);
13525 if (derived
->f2k_derived
->tb_uop_root
)
13526 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13527 &resolve_typebound_user_op
);
13529 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13531 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13532 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13533 (gfc_intrinsic_op
)op
, p
))
13534 resolve_bindings_result
= false;
13537 return resolve_bindings_result
;
13541 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13542 to give all identical derived types the same backend_decl. */
13544 add_dt_to_dt_list (gfc_symbol
*derived
)
13546 if (!derived
->dt_next
)
13548 if (gfc_derived_types
)
13550 derived
->dt_next
= gfc_derived_types
->dt_next
;
13551 gfc_derived_types
->dt_next
= derived
;
13555 derived
->dt_next
= derived
;
13557 gfc_derived_types
= derived
;
13562 /* Ensure that a derived-type is really not abstract, meaning that every
13563 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13566 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13571 if (!ensure_not_abstract_walker (sub
, st
->left
))
13573 if (!ensure_not_abstract_walker (sub
, st
->right
))
13576 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13578 gfc_symtree
* overriding
;
13579 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13582 gcc_assert (overriding
->n
.tb
);
13583 if (overriding
->n
.tb
->deferred
)
13585 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13586 " %qs is DEFERRED and not overridden",
13587 sub
->name
, &sub
->declared_at
, st
->name
);
13596 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13598 /* The algorithm used here is to recursively travel up the ancestry of sub
13599 and for each ancestor-type, check all bindings. If any of them is
13600 DEFERRED, look it up starting from sub and see if the found (overriding)
13601 binding is not DEFERRED.
13602 This is not the most efficient way to do this, but it should be ok and is
13603 clearer than something sophisticated. */
13605 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13607 if (!ancestor
->attr
.abstract
)
13610 /* Walk bindings of this ancestor. */
13611 if (ancestor
->f2k_derived
)
13614 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13619 /* Find next ancestor type and recurse on it. */
13620 ancestor
= gfc_get_derived_super_type (ancestor
);
13622 return ensure_not_abstract (sub
, ancestor
);
13628 /* This check for typebound defined assignments is done recursively
13629 since the order in which derived types are resolved is not always in
13630 order of the declarations. */
13633 check_defined_assignments (gfc_symbol
*derived
)
13637 for (c
= derived
->components
; c
; c
= c
->next
)
13639 if (!gfc_bt_struct (c
->ts
.type
)
13641 || c
->attr
.allocatable
13642 || c
->attr
.proc_pointer_comp
13643 || c
->attr
.class_pointer
13644 || c
->attr
.proc_pointer
)
13647 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13648 || (c
->ts
.u
.derived
->f2k_derived
13649 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13651 derived
->attr
.defined_assign_comp
= 1;
13655 check_defined_assignments (c
->ts
.u
.derived
);
13656 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13658 derived
->attr
.defined_assign_comp
= 1;
13665 /* Resolve a single component of a derived type or structure. */
13668 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13670 gfc_symbol
*super_type
;
13672 if (c
->attr
.artificial
)
13675 /* Do not allow vtype components to be resolved in nameless namespaces
13676 such as block data because the procedure pointers will cause ICEs
13677 and vtables are not needed in these contexts. */
13678 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13679 && sym
->ns
->proc_name
== NULL
)
13683 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13684 && c
->attr
.codimension
13685 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13687 gfc_error ("Coarray component %qs at %L must be allocatable with "
13688 "deferred shape", c
->name
, &c
->loc
);
13693 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13694 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13696 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13697 "shall not be a coarray", c
->name
, &c
->loc
);
13702 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13703 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13704 || c
->attr
.allocatable
))
13706 gfc_error ("Component %qs at %L with coarray component "
13707 "shall be a nonpointer, nonallocatable scalar",
13713 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13715 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13716 "is not an array pointer", c
->name
, &c
->loc
);
13720 /* F2003, 15.2.1 - length has to be one. */
13721 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13722 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13723 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13724 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13726 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13731 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13733 gfc_symbol
*ifc
= c
->ts
.interface
;
13735 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13741 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13743 /* Resolve interface and copy attributes. */
13744 if (ifc
->formal
&& !ifc
->formal_ns
)
13745 resolve_symbol (ifc
);
13746 if (ifc
->attr
.intrinsic
)
13747 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13751 c
->ts
= ifc
->result
->ts
;
13752 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13753 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13754 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13755 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13756 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13761 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13762 c
->attr
.pointer
= ifc
->attr
.pointer
;
13763 c
->attr
.dimension
= ifc
->attr
.dimension
;
13764 c
->as
= gfc_copy_array_spec (ifc
->as
);
13765 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13767 c
->ts
.interface
= ifc
;
13768 c
->attr
.function
= ifc
->attr
.function
;
13769 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13771 c
->attr
.pure
= ifc
->attr
.pure
;
13772 c
->attr
.elemental
= ifc
->attr
.elemental
;
13773 c
->attr
.recursive
= ifc
->attr
.recursive
;
13774 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13775 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13776 /* Copy char length. */
13777 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13779 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13780 if (cl
->length
&& !cl
->resolved
13781 && !gfc_resolve_expr (cl
->length
))
13790 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13792 /* Since PPCs are not implicitly typed, a PPC without an explicit
13793 interface must be a subroutine. */
13794 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13797 /* Procedure pointer components: Check PASS arg. */
13798 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13799 && !sym
->attr
.vtype
)
13801 gfc_symbol
* me_arg
;
13803 if (c
->tb
->pass_arg
)
13805 gfc_formal_arglist
* i
;
13807 /* If an explicit passing argument name is given, walk the arg-list
13808 and look for it. */
13811 c
->tb
->pass_arg_num
= 1;
13812 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13814 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13819 c
->tb
->pass_arg_num
++;
13824 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13825 "at %L has no argument %qs", c
->name
,
13826 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13833 /* Otherwise, take the first one; there should in fact be at least
13835 c
->tb
->pass_arg_num
= 1;
13836 if (!c
->ts
.interface
->formal
)
13838 gfc_error ("Procedure pointer component %qs with PASS at %L "
13839 "must have at least one argument",
13844 me_arg
= c
->ts
.interface
->formal
->sym
;
13847 /* Now check that the argument-type matches. */
13848 gcc_assert (me_arg
);
13849 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13850 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13851 || (me_arg
->ts
.type
== BT_CLASS
13852 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13854 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13855 " the derived type %qs", me_arg
->name
, c
->name
,
13856 me_arg
->name
, &c
->loc
, sym
->name
);
13861 /* Check for F03:C453. */
13862 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13864 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13865 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13871 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13873 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13874 "may not have the POINTER attribute", me_arg
->name
,
13875 c
->name
, me_arg
->name
, &c
->loc
);
13880 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13882 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13883 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13884 me_arg
->name
, &c
->loc
);
13889 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13891 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13892 " at %L", c
->name
, &c
->loc
);
13898 /* Check type-spec if this is not the parent-type component. */
13899 if (((sym
->attr
.is_class
13900 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13901 || c
!= sym
->components
->ts
.u
.derived
->components
))
13902 || (!sym
->attr
.is_class
13903 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13904 && !sym
->attr
.vtype
13905 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13908 super_type
= gfc_get_derived_super_type (sym
);
13910 /* If this type is an extension, set the accessibility of the parent
13913 && ((sym
->attr
.is_class
13914 && c
== sym
->components
->ts
.u
.derived
->components
)
13915 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13916 && strcmp (super_type
->name
, c
->name
) == 0)
13917 c
->attr
.access
= super_type
->attr
.access
;
13919 /* If this type is an extension, see if this component has the same name
13920 as an inherited type-bound procedure. */
13921 if (super_type
&& !sym
->attr
.is_class
13922 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13924 gfc_error ("Component %qs of %qs at %L has the same name as an"
13925 " inherited type-bound procedure",
13926 c
->name
, sym
->name
, &c
->loc
);
13930 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13931 && !c
->ts
.deferred
)
13933 if (c
->ts
.u
.cl
->length
== NULL
13934 || (!resolve_charlen(c
->ts
.u
.cl
))
13935 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13937 gfc_error ("Character length of component %qs needs to "
13938 "be a constant specification expression at %L",
13940 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13945 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13946 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13948 gfc_error ("Character component %qs of %qs at %L with deferred "
13949 "length must be a POINTER or ALLOCATABLE",
13950 c
->name
, sym
->name
, &c
->loc
);
13954 /* Add the hidden deferred length field. */
13955 if (c
->ts
.type
== BT_CHARACTER
13956 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13957 && !c
->attr
.function
13958 && !sym
->attr
.is_class
)
13960 char name
[GFC_MAX_SYMBOL_LEN
+9];
13961 gfc_component
*strlen
;
13962 sprintf (name
, "_%s_length", c
->name
);
13963 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13964 if (strlen
== NULL
)
13966 if (!gfc_add_component (sym
, name
, &strlen
))
13968 strlen
->ts
.type
= BT_INTEGER
;
13969 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13970 strlen
->attr
.access
= ACCESS_PRIVATE
;
13971 strlen
->attr
.artificial
= 1;
13975 if (c
->ts
.type
== BT_DERIVED
13976 && sym
->component_access
!= ACCESS_PRIVATE
13977 && gfc_check_symbol_access (sym
)
13978 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13979 && !c
->ts
.u
.derived
->attr
.use_assoc
13980 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13981 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13982 "PRIVATE type and cannot be a component of "
13983 "%qs, which is PUBLIC at %L", c
->name
,
13984 sym
->name
, &sym
->declared_at
))
13987 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13989 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13990 "type %s", c
->name
, &c
->loc
, sym
->name
);
13994 if (sym
->attr
.sequence
)
13996 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13998 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13999 "not have the SEQUENCE attribute",
14000 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14005 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14006 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14007 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14008 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14009 CLASS_DATA (c
)->ts
.u
.derived
14010 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14012 /* If an allocatable component derived type is of the same type as
14013 the enclosing derived type, we need a vtable generating so that
14014 the __deallocate procedure is created. */
14015 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14016 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14017 gfc_find_vtab (&c
->ts
);
14019 /* Ensure that all the derived type components are put on the
14020 derived type list; even in formal namespaces, where derived type
14021 pointer components might not have been declared. */
14022 if (c
->ts
.type
== BT_DERIVED
14024 && c
->ts
.u
.derived
->components
14026 && sym
!= c
->ts
.u
.derived
)
14027 add_dt_to_dt_list (c
->ts
.u
.derived
);
14029 if (!gfc_resolve_array_spec (c
->as
,
14030 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14031 || c
->attr
.allocatable
)))
14034 if (c
->initializer
&& !sym
->attr
.vtype
14035 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14036 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14043 /* Be nice about the locus for a structure expression - show the locus of the
14044 first non-null sub-expression if we can. */
14047 cons_where (gfc_expr
*struct_expr
)
14049 gfc_constructor
*cons
;
14051 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14053 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14054 for (; cons
; cons
= gfc_constructor_next (cons
))
14056 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14057 return &cons
->expr
->where
;
14060 return &struct_expr
->where
;
14063 /* Resolve the components of a structure type. Much less work than derived
14067 resolve_fl_struct (gfc_symbol
*sym
)
14070 gfc_expr
*init
= NULL
;
14073 /* Make sure UNIONs do not have overlapping initializers. */
14074 if (sym
->attr
.flavor
== FL_UNION
)
14076 for (c
= sym
->components
; c
; c
= c
->next
)
14078 if (init
&& c
->initializer
)
14080 gfc_error ("Conflicting initializers in union at %L and %L",
14081 cons_where (init
), cons_where (c
->initializer
));
14082 gfc_free_expr (c
->initializer
);
14083 c
->initializer
= NULL
;
14086 init
= c
->initializer
;
14091 for (c
= sym
->components
; c
; c
= c
->next
)
14092 if (!resolve_component (c
, sym
))
14098 if (sym
->components
)
14099 add_dt_to_dt_list (sym
);
14105 /* Resolve the components of a derived type. This does not have to wait until
14106 resolution stage, but can be done as soon as the dt declaration has been
14110 resolve_fl_derived0 (gfc_symbol
*sym
)
14112 gfc_symbol
* super_type
;
14114 gfc_formal_arglist
*f
;
14117 if (sym
->attr
.unlimited_polymorphic
)
14120 super_type
= gfc_get_derived_super_type (sym
);
14123 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14125 gfc_error ("As extending type %qs at %L has a coarray component, "
14126 "parent type %qs shall also have one", sym
->name
,
14127 &sym
->declared_at
, super_type
->name
);
14131 /* Ensure the extended type gets resolved before we do. */
14132 if (super_type
&& !resolve_fl_derived0 (super_type
))
14135 /* An ABSTRACT type must be extensible. */
14136 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14138 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14139 sym
->name
, &sym
->declared_at
);
14143 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14147 for ( ; c
!= NULL
; c
= c
->next
)
14148 if (!resolve_component (c
, sym
))
14154 /* Now add the caf token field, where needed. */
14155 if (flag_coarray
!= GFC_FCOARRAY_NONE
14156 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14158 for (c
= sym
->components
; c
; c
= c
->next
)
14159 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14160 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14162 char name
[GFC_MAX_SYMBOL_LEN
+9];
14163 gfc_component
*token
;
14164 sprintf (name
, "_caf_%s", c
->name
);
14165 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14168 if (!gfc_add_component (sym
, name
, &token
))
14170 token
->ts
.type
= BT_VOID
;
14171 token
->ts
.kind
= gfc_default_integer_kind
;
14172 token
->attr
.access
= ACCESS_PRIVATE
;
14173 token
->attr
.artificial
= 1;
14174 token
->attr
.caf_token
= 1;
14179 check_defined_assignments (sym
);
14181 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14182 sym
->attr
.defined_assign_comp
14183 = super_type
->attr
.defined_assign_comp
;
14185 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14186 all DEFERRED bindings are overridden. */
14187 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14188 && !sym
->attr
.is_class
14189 && !ensure_not_abstract (sym
, super_type
))
14192 /* Check that there is a component for every PDT parameter. */
14193 if (sym
->attr
.pdt_template
)
14195 for (f
= sym
->formal
; f
; f
= f
->next
)
14199 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14202 gfc_error ("Parameterized type %qs does not have a component "
14203 "corresponding to parameter %qs at %L", sym
->name
,
14204 f
->sym
->name
, &sym
->declared_at
);
14210 /* Add derived type to the derived type list. */
14211 add_dt_to_dt_list (sym
);
14217 /* The following procedure does the full resolution of a derived type,
14218 including resolution of all type-bound procedures (if present). In contrast
14219 to 'resolve_fl_derived0' this can only be done after the module has been
14220 parsed completely. */
14223 resolve_fl_derived (gfc_symbol
*sym
)
14225 gfc_symbol
*gen_dt
= NULL
;
14227 if (sym
->attr
.unlimited_polymorphic
)
14230 if (!sym
->attr
.is_class
)
14231 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14232 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14233 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14234 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14235 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14236 "%qs at %L being the same name as derived "
14237 "type at %L", sym
->name
,
14238 gen_dt
->generic
->sym
== sym
14239 ? gen_dt
->generic
->next
->sym
->name
14240 : gen_dt
->generic
->sym
->name
,
14241 gen_dt
->generic
->sym
== sym
14242 ? &gen_dt
->generic
->next
->sym
->declared_at
14243 : &gen_dt
->generic
->sym
->declared_at
,
14244 &sym
->declared_at
))
14247 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
)
14249 gfc_error ("Derived type %qs at %L has not been declared",
14250 sym
->name
, &sym
->declared_at
);
14254 /* Resolve the finalizer procedures. */
14255 if (!gfc_resolve_finalizers (sym
, NULL
))
14258 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14260 /* Fix up incomplete CLASS symbols. */
14261 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14262 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14264 /* Nothing more to do for unlimited polymorphic entities. */
14265 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14267 else if (vptr
->ts
.u
.derived
== NULL
)
14269 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14271 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14272 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14277 if (!resolve_fl_derived0 (sym
))
14280 /* Resolve the type-bound procedures. */
14281 if (!resolve_typebound_procedures (sym
))
14284 /* Generate module vtables subject to their accessibility and their not
14285 being vtables or pdt templates. If this is not done class declarations
14286 in external procedures wind up with their own version and so SELECT TYPE
14287 fails because the vptrs do not have the same address. */
14288 if (gfc_option
.allow_std
& GFC_STD_F2003
14289 && sym
->ns
->proc_name
14290 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14291 && sym
->attr
.access
!= ACCESS_PRIVATE
14292 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14294 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14295 gfc_set_sym_referenced (vtab
);
14303 resolve_fl_namelist (gfc_symbol
*sym
)
14308 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14310 /* Check again, the check in match only works if NAMELIST comes
14312 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14314 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14315 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14319 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14320 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14321 "with assumed shape in namelist %qs at %L",
14322 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14325 if (is_non_constant_shape_array (nl
->sym
)
14326 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14327 "with nonconstant shape in namelist %qs at %L",
14328 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14331 if (nl
->sym
->ts
.type
== BT_CHARACTER
14332 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14333 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14334 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14335 "nonconstant character length in "
14336 "namelist %qs at %L", nl
->sym
->name
,
14337 sym
->name
, &sym
->declared_at
))
14342 /* Reject PRIVATE objects in a PUBLIC namelist. */
14343 if (gfc_check_symbol_access (sym
))
14345 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14347 if (!nl
->sym
->attr
.use_assoc
14348 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14349 && !gfc_check_symbol_access (nl
->sym
))
14351 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14352 "cannot be member of PUBLIC namelist %qs at %L",
14353 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14357 if (nl
->sym
->ts
.type
== BT_DERIVED
14358 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14359 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14361 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14362 "namelist %qs at %L with ALLOCATABLE "
14363 "or POINTER components", nl
->sym
->name
,
14364 sym
->name
, &sym
->declared_at
))
14369 /* Types with private components that came here by USE-association. */
14370 if (nl
->sym
->ts
.type
== BT_DERIVED
14371 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14373 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14374 "components and cannot be member of namelist %qs at %L",
14375 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14379 /* Types with private components that are defined in the same module. */
14380 if (nl
->sym
->ts
.type
== BT_DERIVED
14381 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14382 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14384 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14385 "cannot be a member of PUBLIC namelist %qs at %L",
14386 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14393 /* 14.1.2 A module or internal procedure represent local entities
14394 of the same type as a namelist member and so are not allowed. */
14395 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14397 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14400 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14401 if ((nl
->sym
== sym
->ns
->proc_name
)
14403 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14408 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14409 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14411 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14412 "attribute in %qs at %L", nlsym
->name
,
14413 &sym
->declared_at
);
14420 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14421 nl
->sym
->attr
.asynchronous
= 1;
14428 resolve_fl_parameter (gfc_symbol
*sym
)
14430 /* A parameter array's shape needs to be constant. */
14431 if (sym
->as
!= NULL
14432 && (sym
->as
->type
== AS_DEFERRED
14433 || is_non_constant_shape_array (sym
)))
14435 gfc_error ("Parameter array %qs at %L cannot be automatic "
14436 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14440 /* Constraints on deferred type parameter. */
14441 if (!deferred_requirements (sym
))
14444 /* Make sure a parameter that has been implicitly typed still
14445 matches the implicit type, since PARAMETER statements can precede
14446 IMPLICIT statements. */
14447 if (sym
->attr
.implicit_type
14448 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14451 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14452 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14456 /* Make sure the types of derived parameters are consistent. This
14457 type checking is deferred until resolution because the type may
14458 refer to a derived type from the host. */
14459 if (sym
->ts
.type
== BT_DERIVED
14460 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14462 gfc_error ("Incompatible derived type in PARAMETER at %L",
14463 &sym
->value
->where
);
14467 /* F03:C509,C514. */
14468 if (sym
->ts
.type
== BT_CLASS
)
14470 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14471 sym
->name
, &sym
->declared_at
);
14479 /* Called by resolve_symbol to check PDTs. */
14482 resolve_pdt (gfc_symbol
* sym
)
14484 gfc_symbol
*derived
= NULL
;
14485 gfc_actual_arglist
*param
;
14487 bool const_len_exprs
= true;
14488 bool assumed_len_exprs
= false;
14489 symbol_attribute
*attr
;
14491 if (sym
->ts
.type
== BT_DERIVED
)
14493 derived
= sym
->ts
.u
.derived
;
14494 attr
= &(sym
->attr
);
14496 else if (sym
->ts
.type
== BT_CLASS
)
14498 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14499 attr
= &(CLASS_DATA (sym
)->attr
);
14502 gcc_unreachable ();
14504 gcc_assert (derived
->attr
.pdt_type
);
14506 for (param
= sym
->param_list
; param
; param
= param
->next
)
14508 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14510 if (c
->attr
.pdt_kind
)
14513 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14514 && c
->attr
.pdt_len
)
14515 const_len_exprs
= false;
14516 else if (param
->spec_type
== SPEC_ASSUMED
)
14517 assumed_len_exprs
= true;
14519 if (param
->spec_type
== SPEC_DEFERRED
14520 && !attr
->allocatable
&& !attr
->pointer
)
14521 gfc_error ("The object %qs at %L has a deferred LEN "
14522 "parameter %qs and is neither allocatable "
14523 "nor a pointer", sym
->name
, &sym
->declared_at
,
14528 if (!const_len_exprs
14529 && (sym
->ns
->proc_name
->attr
.is_main_program
14530 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14531 || sym
->attr
.save
!= SAVE_NONE
))
14532 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14533 "SAVE attribute or be a variable declared in the "
14534 "main program, a module or a submodule(F08/C513)",
14535 sym
->name
, &sym
->declared_at
);
14537 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14538 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14539 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14540 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14541 sym
->name
, &sym
->declared_at
);
14545 /* Do anything necessary to resolve a symbol. Right now, we just
14546 assume that an otherwise unknown symbol is a variable. This sort
14547 of thing commonly happens for symbols in module. */
14550 resolve_symbol (gfc_symbol
*sym
)
14552 int check_constant
, mp_flag
;
14553 gfc_symtree
*symtree
;
14554 gfc_symtree
*this_symtree
;
14557 symbol_attribute class_attr
;
14558 gfc_array_spec
*as
;
14559 bool saved_specification_expr
;
14565 /* No symbol will ever have union type; only components can be unions.
14566 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14567 (just like derived type declaration symbols have flavor FL_DERIVED). */
14568 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14570 /* Coarrayed polymorphic objects with allocatable or pointer components are
14571 yet unsupported for -fcoarray=lib. */
14572 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14573 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14574 && CLASS_DATA (sym
)->attr
.codimension
14575 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14576 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14578 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14579 "type coarrays at %L are unsupported", &sym
->declared_at
);
14583 if (sym
->attr
.artificial
)
14586 if (sym
->attr
.unlimited_polymorphic
)
14589 if (sym
->attr
.flavor
== FL_UNKNOWN
14590 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14591 && !sym
->attr
.generic
&& !sym
->attr
.external
14592 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14593 && sym
->ts
.type
== BT_UNKNOWN
))
14596 /* If we find that a flavorless symbol is an interface in one of the
14597 parent namespaces, find its symtree in this namespace, free the
14598 symbol and set the symtree to point to the interface symbol. */
14599 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14601 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14602 if (symtree
&& (symtree
->n
.sym
->generic
||
14603 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14604 && sym
->ns
->construct_entities
)))
14606 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14608 if (this_symtree
->n
.sym
== sym
)
14610 symtree
->n
.sym
->refs
++;
14611 gfc_release_symbol (sym
);
14612 this_symtree
->n
.sym
= symtree
->n
.sym
;
14618 /* Otherwise give it a flavor according to such attributes as
14620 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14621 && sym
->attr
.intrinsic
== 0)
14622 sym
->attr
.flavor
= FL_VARIABLE
;
14623 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14625 sym
->attr
.flavor
= FL_PROCEDURE
;
14626 if (sym
->attr
.dimension
)
14627 sym
->attr
.function
= 1;
14631 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14632 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14634 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14635 && !resolve_procedure_interface (sym
))
14638 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14639 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14641 if (sym
->attr
.external
)
14642 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14643 "at %L", &sym
->declared_at
);
14645 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14646 "at %L", &sym
->declared_at
);
14651 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14654 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14655 && !resolve_fl_struct (sym
))
14658 /* Symbols that are module procedures with results (functions) have
14659 the types and array specification copied for type checking in
14660 procedures that call them, as well as for saving to a module
14661 file. These symbols can't stand the scrutiny that their results
14663 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14665 /* Make sure that the intrinsic is consistent with its internal
14666 representation. This needs to be done before assigning a default
14667 type to avoid spurious warnings. */
14668 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14669 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14672 /* Resolve associate names. */
14674 resolve_assoc_var (sym
, true);
14676 /* Assign default type to symbols that need one and don't have one. */
14677 if (sym
->ts
.type
== BT_UNKNOWN
)
14679 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14681 gfc_set_default_type (sym
, 1, NULL
);
14684 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14685 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14686 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14687 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14689 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14691 /* The specific case of an external procedure should emit an error
14692 in the case that there is no implicit type. */
14695 if (!sym
->attr
.mixed_entry_master
)
14696 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14700 /* Result may be in another namespace. */
14701 resolve_symbol (sym
->result
);
14703 if (!sym
->result
->attr
.proc_pointer
)
14705 sym
->ts
= sym
->result
->ts
;
14706 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14707 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14708 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14709 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14710 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14715 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14717 bool saved_specification_expr
= specification_expr
;
14718 specification_expr
= true;
14719 gfc_resolve_array_spec (sym
->result
->as
, false);
14720 specification_expr
= saved_specification_expr
;
14723 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14725 as
= CLASS_DATA (sym
)->as
;
14726 class_attr
= CLASS_DATA (sym
)->attr
;
14727 class_attr
.pointer
= class_attr
.class_pointer
;
14731 class_attr
= sym
->attr
;
14736 if (sym
->attr
.contiguous
14737 && (!class_attr
.dimension
14738 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14739 && !class_attr
.pointer
)))
14741 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14742 "array pointer or an assumed-shape or assumed-rank array",
14743 sym
->name
, &sym
->declared_at
);
14747 /* Assumed size arrays and assumed shape arrays must be dummy
14748 arguments. Array-spec's of implied-shape should have been resolved to
14749 AS_EXPLICIT already. */
14753 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14754 specification expression. */
14755 if (as
->type
== AS_IMPLIED_SHAPE
)
14758 for (i
=0; i
<as
->rank
; i
++)
14760 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14762 gfc_error ("Bad specification for assumed size array at %L",
14763 &as
->lower
[i
]->where
);
14770 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14771 || as
->type
== AS_ASSUMED_SHAPE
)
14772 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14774 if (as
->type
== AS_ASSUMED_SIZE
)
14775 gfc_error ("Assumed size array at %L must be a dummy argument",
14776 &sym
->declared_at
);
14778 gfc_error ("Assumed shape array at %L must be a dummy argument",
14779 &sym
->declared_at
);
14782 /* TS 29113, C535a. */
14783 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14784 && !sym
->attr
.select_type_temporary
)
14786 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14787 &sym
->declared_at
);
14790 if (as
->type
== AS_ASSUMED_RANK
14791 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14793 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14794 "CODIMENSION attribute", &sym
->declared_at
);
14799 /* Make sure symbols with known intent or optional are really dummy
14800 variable. Because of ENTRY statement, this has to be deferred
14801 until resolution time. */
14803 if (!sym
->attr
.dummy
14804 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14806 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14810 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14812 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14813 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14817 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14819 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14820 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14822 gfc_error ("Character dummy variable %qs at %L with VALUE "
14823 "attribute must have constant length",
14824 sym
->name
, &sym
->declared_at
);
14828 if (sym
->ts
.is_c_interop
14829 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14831 gfc_error ("C interoperable character dummy variable %qs at %L "
14832 "with VALUE attribute must have length one",
14833 sym
->name
, &sym
->declared_at
);
14838 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14839 && sym
->ts
.u
.derived
->attr
.generic
)
14841 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14842 if (!sym
->ts
.u
.derived
)
14844 gfc_error ("The derived type %qs at %L is of type %qs, "
14845 "which has not been defined", sym
->name
,
14846 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14847 sym
->ts
.type
= BT_UNKNOWN
;
14852 /* Use the same constraints as TYPE(*), except for the type check
14853 and that only scalars and assumed-size arrays are permitted. */
14854 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14856 if (!sym
->attr
.dummy
)
14858 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14859 "a dummy argument", sym
->name
, &sym
->declared_at
);
14863 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14864 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14865 && sym
->ts
.type
!= BT_COMPLEX
)
14867 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14868 "of type TYPE(*) or of an numeric intrinsic type",
14869 sym
->name
, &sym
->declared_at
);
14873 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14874 || sym
->attr
.pointer
|| sym
->attr
.value
)
14876 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14877 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14878 "attribute", sym
->name
, &sym
->declared_at
);
14882 if (sym
->attr
.intent
== INTENT_OUT
)
14884 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14885 "have the INTENT(OUT) attribute",
14886 sym
->name
, &sym
->declared_at
);
14889 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14891 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14892 "either be a scalar or an assumed-size array",
14893 sym
->name
, &sym
->declared_at
);
14897 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14898 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14900 sym
->ts
.type
= BT_ASSUMED
;
14901 sym
->as
= gfc_get_array_spec ();
14902 sym
->as
->type
= AS_ASSUMED_SIZE
;
14904 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14906 else if (sym
->ts
.type
== BT_ASSUMED
)
14908 /* TS 29113, C407a. */
14909 if (!sym
->attr
.dummy
)
14911 gfc_error ("Assumed type of variable %s at %L is only permitted "
14912 "for dummy variables", sym
->name
, &sym
->declared_at
);
14915 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14916 || sym
->attr
.pointer
|| sym
->attr
.value
)
14918 gfc_error ("Assumed-type variable %s at %L may not have the "
14919 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14920 sym
->name
, &sym
->declared_at
);
14923 if (sym
->attr
.intent
== INTENT_OUT
)
14925 gfc_error ("Assumed-type variable %s at %L may not have the "
14926 "INTENT(OUT) attribute",
14927 sym
->name
, &sym
->declared_at
);
14930 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14932 gfc_error ("Assumed-type variable %s at %L shall not be an "
14933 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14938 /* If the symbol is marked as bind(c), that it is declared at module level
14939 scope and verify its type and kind. Do not do the latter for symbols
14940 that are implicitly typed because that is handled in
14941 gfc_set_default_type. Handle dummy arguments and procedure definitions
14942 separately. Also, anything that is use associated is not handled here
14943 but instead is handled in the module it is declared in. Finally, derived
14944 type definitions are allowed to be BIND(C) since that only implies that
14945 they're interoperable, and they are checked fully for interoperability
14946 when a variable is declared of that type. */
14947 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14948 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14949 && sym
->attr
.flavor
!= FL_DERIVED
)
14953 /* First, make sure the variable is declared at the
14954 module-level scope (J3/04-007, Section 15.3). */
14955 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14956 sym
->attr
.in_common
== 0)
14958 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14959 "is neither a COMMON block nor declared at the "
14960 "module level scope", sym
->name
, &(sym
->declared_at
));
14963 else if (sym
->ts
.type
== BT_CHARACTER
14964 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14965 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14966 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14968 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14969 sym
->name
, &sym
->declared_at
);
14972 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14974 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14976 else if (sym
->attr
.implicit_type
== 0)
14978 /* If type() declaration, we need to verify that the components
14979 of the given type are all C interoperable, etc. */
14980 if (sym
->ts
.type
== BT_DERIVED
&&
14981 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14983 /* Make sure the user marked the derived type as BIND(C). If
14984 not, call the verify routine. This could print an error
14985 for the derived type more than once if multiple variables
14986 of that type are declared. */
14987 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14988 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14992 /* Verify the variable itself as C interoperable if it
14993 is BIND(C). It is not possible for this to succeed if
14994 the verify_bind_c_derived_type failed, so don't have to handle
14995 any error returned by verify_bind_c_derived_type. */
14996 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14997 sym
->common_block
);
15002 /* clear the is_bind_c flag to prevent reporting errors more than
15003 once if something failed. */
15004 sym
->attr
.is_bind_c
= 0;
15009 /* If a derived type symbol has reached this point, without its
15010 type being declared, we have an error. Notice that most
15011 conditions that produce undefined derived types have already
15012 been dealt with. However, the likes of:
15013 implicit type(t) (t) ..... call foo (t) will get us here if
15014 the type is not declared in the scope of the implicit
15015 statement. Change the type to BT_UNKNOWN, both because it is so
15016 and to prevent an ICE. */
15017 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15018 && sym
->ts
.u
.derived
->components
== NULL
15019 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15021 gfc_error ("The derived type %qs at %L is of type %qs, "
15022 "which has not been defined", sym
->name
,
15023 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15024 sym
->ts
.type
= BT_UNKNOWN
;
15028 /* Make sure that the derived type has been resolved and that the
15029 derived type is visible in the symbol's namespace, if it is a
15030 module function and is not PRIVATE. */
15031 if (sym
->ts
.type
== BT_DERIVED
15032 && sym
->ts
.u
.derived
->attr
.use_assoc
15033 && sym
->ns
->proc_name
15034 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15035 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15038 /* Unless the derived-type declaration is use associated, Fortran 95
15039 does not allow public entries of private derived types.
15040 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15041 161 in 95-006r3. */
15042 if (sym
->ts
.type
== BT_DERIVED
15043 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15044 && !sym
->ts
.u
.derived
->attr
.use_assoc
15045 && gfc_check_symbol_access (sym
)
15046 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15047 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15048 "derived type %qs",
15049 (sym
->attr
.flavor
== FL_PARAMETER
)
15050 ? "parameter" : "variable",
15051 sym
->name
, &sym
->declared_at
,
15052 sym
->ts
.u
.derived
->name
))
15055 /* F2008, C1302. */
15056 if (sym
->ts
.type
== BT_DERIVED
15057 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15058 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15059 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15060 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15062 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15063 "type LOCK_TYPE must be a coarray", sym
->name
,
15064 &sym
->declared_at
);
15068 /* TS18508, C702/C703. */
15069 if (sym
->ts
.type
== BT_DERIVED
15070 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15071 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15072 || sym
->ts
.u
.derived
->attr
.event_comp
)
15073 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15075 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15076 "type EVENT_TYPE must be a coarray", sym
->name
,
15077 &sym
->declared_at
);
15081 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15082 default initialization is defined (5.1.2.4.4). */
15083 if (sym
->ts
.type
== BT_DERIVED
15085 && sym
->attr
.intent
== INTENT_OUT
15087 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15089 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15091 if (c
->initializer
)
15093 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15094 "ASSUMED SIZE and so cannot have a default initializer",
15095 sym
->name
, &sym
->declared_at
);
15102 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15103 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15105 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15106 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15111 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15112 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15114 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15115 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15120 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15121 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15122 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15123 || class_attr
.codimension
)
15124 && (sym
->attr
.result
|| sym
->result
== sym
))
15126 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15127 "a coarray component", sym
->name
, &sym
->declared_at
);
15132 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15133 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15135 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15136 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15141 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15142 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15143 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15144 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15145 || class_attr
.allocatable
))
15147 gfc_error ("Variable %qs at %L with coarray component shall be a "
15148 "nonpointer, nonallocatable scalar, which is not a coarray",
15149 sym
->name
, &sym
->declared_at
);
15153 /* F2008, C526. The function-result case was handled above. */
15154 if (class_attr
.codimension
15155 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15156 || sym
->attr
.select_type_temporary
15157 || sym
->attr
.associate_var
15158 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15159 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15160 || sym
->ns
->proc_name
->attr
.is_main_program
15161 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15163 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15164 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15168 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15169 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15171 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15172 "deferred shape", sym
->name
, &sym
->declared_at
);
15175 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15176 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15178 gfc_error ("Allocatable coarray variable %qs at %L must have "
15179 "deferred shape", sym
->name
, &sym
->declared_at
);
15184 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15185 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15186 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15187 || (class_attr
.codimension
&& class_attr
.allocatable
))
15188 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15190 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15191 "allocatable coarray or have coarray components",
15192 sym
->name
, &sym
->declared_at
);
15196 if (class_attr
.codimension
&& sym
->attr
.dummy
15197 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15199 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15200 "procedure %qs", sym
->name
, &sym
->declared_at
,
15201 sym
->ns
->proc_name
->name
);
15205 if (sym
->ts
.type
== BT_LOGICAL
15206 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15207 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15208 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15211 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15212 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15214 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15215 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15216 "%L with non-C_Bool kind in BIND(C) procedure "
15217 "%qs", sym
->name
, &sym
->declared_at
,
15218 sym
->ns
->proc_name
->name
))
15220 else if (!gfc_logical_kinds
[i
].c_bool
15221 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15222 "%qs at %L with non-C_Bool kind in "
15223 "BIND(C) procedure %qs", sym
->name
,
15225 sym
->attr
.function
? sym
->name
15226 : sym
->ns
->proc_name
->name
))
15230 switch (sym
->attr
.flavor
)
15233 if (!resolve_fl_variable (sym
, mp_flag
))
15238 if (sym
->formal
&& !sym
->formal_ns
)
15240 /* Check that none of the arguments are a namelist. */
15241 gfc_formal_arglist
*formal
= sym
->formal
;
15243 for (; formal
; formal
= formal
->next
)
15244 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15246 gfc_error ("Namelist %qs can not be an argument to "
15247 "subroutine or function at %L",
15248 formal
->sym
->name
, &sym
->declared_at
);
15253 if (!resolve_fl_procedure (sym
, mp_flag
))
15258 if (!resolve_fl_namelist (sym
))
15263 if (!resolve_fl_parameter (sym
))
15271 /* Resolve array specifier. Check as well some constraints
15272 on COMMON blocks. */
15274 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15276 /* Set the formal_arg_flag so that check_conflict will not throw
15277 an error for host associated variables in the specification
15278 expression for an array_valued function. */
15279 if (sym
->attr
.function
&& sym
->as
)
15280 formal_arg_flag
= true;
15282 saved_specification_expr
= specification_expr
;
15283 specification_expr
= true;
15284 gfc_resolve_array_spec (sym
->as
, check_constant
);
15285 specification_expr
= saved_specification_expr
;
15287 formal_arg_flag
= false;
15289 /* Resolve formal namespaces. */
15290 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15291 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15292 gfc_resolve (sym
->formal_ns
);
15294 /* Make sure the formal namespace is present. */
15295 if (sym
->formal
&& !sym
->formal_ns
)
15297 gfc_formal_arglist
*formal
= sym
->formal
;
15298 while (formal
&& !formal
->sym
)
15299 formal
= formal
->next
;
15303 sym
->formal_ns
= formal
->sym
->ns
;
15304 if (sym
->ns
!= formal
->sym
->ns
)
15305 sym
->formal_ns
->refs
++;
15309 /* Check threadprivate restrictions. */
15310 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15311 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15312 && (!sym
->attr
.in_common
15313 && sym
->module
== NULL
15314 && (sym
->ns
->proc_name
== NULL
15315 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15316 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15318 /* Check omp declare target restrictions. */
15319 if (sym
->attr
.omp_declare_target
15320 && sym
->attr
.flavor
== FL_VARIABLE
15322 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15323 && (!sym
->attr
.in_common
15324 && sym
->module
== NULL
15325 && (sym
->ns
->proc_name
== NULL
15326 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15327 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15328 sym
->name
, &sym
->declared_at
);
15330 /* If we have come this far we can apply default-initializers, as
15331 described in 14.7.5, to those variables that have not already
15332 been assigned one. */
15333 if (sym
->ts
.type
== BT_DERIVED
15335 && !sym
->attr
.allocatable
15336 && !sym
->attr
.alloc_comp
)
15338 symbol_attribute
*a
= &sym
->attr
;
15340 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15341 && !a
->in_common
&& !a
->use_assoc
15343 && !((a
->function
|| a
->result
)
15345 || sym
->ts
.u
.derived
->attr
.alloc_comp
15346 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15347 && !(a
->function
&& sym
!= sym
->result
))
15348 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15349 apply_default_init (sym
);
15350 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15351 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15352 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15353 /* Mark the result symbol to be referenced, when it has allocatable
15355 sym
->result
->attr
.referenced
= 1;
15358 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15359 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15360 && !CLASS_DATA (sym
)->attr
.class_pointer
15361 && !CLASS_DATA (sym
)->attr
.allocatable
)
15362 apply_default_init (sym
);
15364 /* If this symbol has a type-spec, check it. */
15365 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15366 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15367 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15370 if (sym
->param_list
)
15375 /************* Resolve DATA statements *************/
15379 gfc_data_value
*vnode
;
15385 /* Advance the values structure to point to the next value in the data list. */
15388 next_data_value (void)
15390 while (mpz_cmp_ui (values
.left
, 0) == 0)
15393 if (values
.vnode
->next
== NULL
)
15396 values
.vnode
= values
.vnode
->next
;
15397 mpz_set (values
.left
, values
.vnode
->repeat
);
15405 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15411 ar_type mark
= AR_UNKNOWN
;
15413 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15419 if (!gfc_resolve_expr (var
->expr
))
15423 mpz_init_set_si (offset
, 0);
15426 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15427 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15428 e
= e
->value
.function
.actual
->expr
;
15430 if (e
->expr_type
!= EXPR_VARIABLE
)
15431 gfc_internal_error ("check_data_variable(): Bad expression");
15433 sym
= e
->symtree
->n
.sym
;
15435 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15437 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15438 sym
->name
, &sym
->declared_at
);
15441 if (e
->ref
== NULL
&& sym
->as
)
15443 gfc_error ("DATA array %qs at %L must be specified in a previous"
15444 " declaration", sym
->name
, where
);
15448 has_pointer
= sym
->attr
.pointer
;
15450 if (gfc_is_coindexed (e
))
15452 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15457 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15459 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15463 && ref
->type
== REF_ARRAY
15464 && ref
->u
.ar
.type
!= AR_FULL
)
15466 gfc_error ("DATA element %qs at %L is a pointer and so must "
15467 "be a full array", sym
->name
, where
);
15472 if (e
->rank
== 0 || has_pointer
)
15474 mpz_init_set_ui (size
, 1);
15481 /* Find the array section reference. */
15482 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15484 if (ref
->type
!= REF_ARRAY
)
15486 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15492 /* Set marks according to the reference pattern. */
15493 switch (ref
->u
.ar
.type
)
15501 /* Get the start position of array section. */
15502 gfc_get_section_index (ar
, section_index
, &offset
);
15507 gcc_unreachable ();
15510 if (!gfc_array_size (e
, &size
))
15512 gfc_error ("Nonconstant array section at %L in DATA statement",
15514 mpz_clear (offset
);
15521 while (mpz_cmp_ui (size
, 0) > 0)
15523 if (!next_data_value ())
15525 gfc_error ("DATA statement at %L has more variables than values",
15531 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15535 /* If we have more than one element left in the repeat count,
15536 and we have more than one element left in the target variable,
15537 then create a range assignment. */
15538 /* FIXME: Only done for full arrays for now, since array sections
15540 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15541 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15545 if (mpz_cmp (size
, values
.left
) >= 0)
15547 mpz_init_set (range
, values
.left
);
15548 mpz_sub (size
, size
, values
.left
);
15549 mpz_set_ui (values
.left
, 0);
15553 mpz_init_set (range
, size
);
15554 mpz_sub (values
.left
, values
.left
, size
);
15555 mpz_set_ui (size
, 0);
15558 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15561 mpz_add (offset
, offset
, range
);
15568 /* Assign initial value to symbol. */
15571 mpz_sub_ui (values
.left
, values
.left
, 1);
15572 mpz_sub_ui (size
, size
, 1);
15574 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15579 if (mark
== AR_FULL
)
15580 mpz_add_ui (offset
, offset
, 1);
15582 /* Modify the array section indexes and recalculate the offset
15583 for next element. */
15584 else if (mark
== AR_SECTION
)
15585 gfc_advance_section (section_index
, ar
, &offset
);
15589 if (mark
== AR_SECTION
)
15591 for (i
= 0; i
< ar
->dimen
; i
++)
15592 mpz_clear (section_index
[i
]);
15596 mpz_clear (offset
);
15602 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15604 /* Iterate over a list of elements in a DATA statement. */
15607 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15610 iterator_stack frame
;
15611 gfc_expr
*e
, *start
, *end
, *step
;
15612 bool retval
= true;
15614 mpz_init (frame
.value
);
15617 start
= gfc_copy_expr (var
->iter
.start
);
15618 end
= gfc_copy_expr (var
->iter
.end
);
15619 step
= gfc_copy_expr (var
->iter
.step
);
15621 if (!gfc_simplify_expr (start
, 1)
15622 || start
->expr_type
!= EXPR_CONSTANT
)
15624 gfc_error ("start of implied-do loop at %L could not be "
15625 "simplified to a constant value", &start
->where
);
15629 if (!gfc_simplify_expr (end
, 1)
15630 || end
->expr_type
!= EXPR_CONSTANT
)
15632 gfc_error ("end of implied-do loop at %L could not be "
15633 "simplified to a constant value", &start
->where
);
15637 if (!gfc_simplify_expr (step
, 1)
15638 || step
->expr_type
!= EXPR_CONSTANT
)
15640 gfc_error ("step of implied-do loop at %L could not be "
15641 "simplified to a constant value", &start
->where
);
15646 mpz_set (trip
, end
->value
.integer
);
15647 mpz_sub (trip
, trip
, start
->value
.integer
);
15648 mpz_add (trip
, trip
, step
->value
.integer
);
15650 mpz_div (trip
, trip
, step
->value
.integer
);
15652 mpz_set (frame
.value
, start
->value
.integer
);
15654 frame
.prev
= iter_stack
;
15655 frame
.variable
= var
->iter
.var
->symtree
;
15656 iter_stack
= &frame
;
15658 while (mpz_cmp_ui (trip
, 0) > 0)
15660 if (!traverse_data_var (var
->list
, where
))
15666 e
= gfc_copy_expr (var
->expr
);
15667 if (!gfc_simplify_expr (e
, 1))
15674 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15676 mpz_sub_ui (trip
, trip
, 1);
15680 mpz_clear (frame
.value
);
15683 gfc_free_expr (start
);
15684 gfc_free_expr (end
);
15685 gfc_free_expr (step
);
15687 iter_stack
= frame
.prev
;
15692 /* Type resolve variables in the variable list of a DATA statement. */
15695 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15699 for (; var
; var
= var
->next
)
15701 if (var
->expr
== NULL
)
15702 t
= traverse_data_list (var
, where
);
15704 t
= check_data_variable (var
, where
);
15714 /* Resolve the expressions and iterators associated with a data statement.
15715 This is separate from the assignment checking because data lists should
15716 only be resolved once. */
15719 resolve_data_variables (gfc_data_variable
*d
)
15721 for (; d
; d
= d
->next
)
15723 if (d
->list
== NULL
)
15725 if (!gfc_resolve_expr (d
->expr
))
15730 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15733 if (!resolve_data_variables (d
->list
))
15742 /* Resolve a single DATA statement. We implement this by storing a pointer to
15743 the value list into static variables, and then recursively traversing the
15744 variables list, expanding iterators and such. */
15747 resolve_data (gfc_data
*d
)
15750 if (!resolve_data_variables (d
->var
))
15753 values
.vnode
= d
->value
;
15754 if (d
->value
== NULL
)
15755 mpz_set_ui (values
.left
, 0);
15757 mpz_set (values
.left
, d
->value
->repeat
);
15759 if (!traverse_data_var (d
->var
, &d
->where
))
15762 /* At this point, we better not have any values left. */
15764 if (next_data_value ())
15765 gfc_error ("DATA statement at %L has more values than variables",
15770 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15771 accessed by host or use association, is a dummy argument to a pure function,
15772 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15773 is storage associated with any such variable, shall not be used in the
15774 following contexts: (clients of this function). */
15776 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15777 procedure. Returns zero if assignment is OK, nonzero if there is a
15780 gfc_impure_variable (gfc_symbol
*sym
)
15785 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15788 /* Check if the symbol's ns is inside the pure procedure. */
15789 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15793 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15797 proc
= sym
->ns
->proc_name
;
15798 if (sym
->attr
.dummy
15799 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15800 || proc
->attr
.function
))
15803 /* TODO: Sort out what can be storage associated, if anything, and include
15804 it here. In principle equivalences should be scanned but it does not
15805 seem to be possible to storage associate an impure variable this way. */
15810 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15811 current namespace is inside a pure procedure. */
15814 gfc_pure (gfc_symbol
*sym
)
15816 symbol_attribute attr
;
15821 /* Check if the current namespace or one of its parents
15822 belongs to a pure procedure. */
15823 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15825 sym
= ns
->proc_name
;
15829 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15837 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15841 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15842 checks if the current namespace is implicitly pure. Note that this
15843 function returns false for a PURE procedure. */
15846 gfc_implicit_pure (gfc_symbol
*sym
)
15852 /* Check if the current procedure is implicit_pure. Walk up
15853 the procedure list until we find a procedure. */
15854 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15856 sym
= ns
->proc_name
;
15860 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15865 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15866 && !sym
->attr
.pure
;
15871 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15877 /* Check if the current procedure is implicit_pure. Walk up
15878 the procedure list until we find a procedure. */
15879 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15881 sym
= ns
->proc_name
;
15885 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15890 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15891 sym
->attr
.implicit_pure
= 0;
15893 sym
->attr
.pure
= 0;
15897 /* Test whether the current procedure is elemental or not. */
15900 gfc_elemental (gfc_symbol
*sym
)
15902 symbol_attribute attr
;
15905 sym
= gfc_current_ns
->proc_name
;
15910 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15914 /* Warn about unused labels. */
15917 warn_unused_fortran_label (gfc_st_label
*label
)
15922 warn_unused_fortran_label (label
->left
);
15924 if (label
->defined
== ST_LABEL_UNKNOWN
)
15927 switch (label
->referenced
)
15929 case ST_LABEL_UNKNOWN
:
15930 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15931 label
->value
, &label
->where
);
15934 case ST_LABEL_BAD_TARGET
:
15935 gfc_warning (OPT_Wunused_label
,
15936 "Label %d at %L defined but cannot be used",
15937 label
->value
, &label
->where
);
15944 warn_unused_fortran_label (label
->right
);
15948 /* Returns the sequence type of a symbol or sequence. */
15951 sequence_type (gfc_typespec ts
)
15960 if (ts
.u
.derived
->components
== NULL
)
15961 return SEQ_NONDEFAULT
;
15963 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15964 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15965 if (sequence_type (c
->ts
) != result
)
15971 if (ts
.kind
!= gfc_default_character_kind
)
15972 return SEQ_NONDEFAULT
;
15974 return SEQ_CHARACTER
;
15977 if (ts
.kind
!= gfc_default_integer_kind
)
15978 return SEQ_NONDEFAULT
;
15980 return SEQ_NUMERIC
;
15983 if (!(ts
.kind
== gfc_default_real_kind
15984 || ts
.kind
== gfc_default_double_kind
))
15985 return SEQ_NONDEFAULT
;
15987 return SEQ_NUMERIC
;
15990 if (ts
.kind
!= gfc_default_complex_kind
)
15991 return SEQ_NONDEFAULT
;
15993 return SEQ_NUMERIC
;
15996 if (ts
.kind
!= gfc_default_logical_kind
)
15997 return SEQ_NONDEFAULT
;
15999 return SEQ_NUMERIC
;
16002 return SEQ_NONDEFAULT
;
16007 /* Resolve derived type EQUIVALENCE object. */
16010 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16012 gfc_component
*c
= derived
->components
;
16017 /* Shall not be an object of nonsequence derived type. */
16018 if (!derived
->attr
.sequence
)
16020 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16021 "attribute to be an EQUIVALENCE object", sym
->name
,
16026 /* Shall not have allocatable components. */
16027 if (derived
->attr
.alloc_comp
)
16029 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16030 "components to be an EQUIVALENCE object",sym
->name
,
16035 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16037 gfc_error ("Derived type variable %qs at %L with default "
16038 "initialization cannot be in EQUIVALENCE with a variable "
16039 "in COMMON", sym
->name
, &e
->where
);
16043 for (; c
; c
= c
->next
)
16045 if (gfc_bt_struct (c
->ts
.type
)
16046 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16049 /* Shall not be an object of sequence derived type containing a pointer
16050 in the structure. */
16051 if (c
->attr
.pointer
)
16053 gfc_error ("Derived type variable %qs at %L with pointer "
16054 "component(s) cannot be an EQUIVALENCE object",
16055 sym
->name
, &e
->where
);
16063 /* Resolve equivalence object.
16064 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16065 an allocatable array, an object of nonsequence derived type, an object of
16066 sequence derived type containing a pointer at any level of component
16067 selection, an automatic object, a function name, an entry name, a result
16068 name, a named constant, a structure component, or a subobject of any of
16069 the preceding objects. A substring shall not have length zero. A
16070 derived type shall not have components with default initialization nor
16071 shall two objects of an equivalence group be initialized.
16072 Either all or none of the objects shall have an protected attribute.
16073 The simple constraints are done in symbol.c(check_conflict) and the rest
16074 are implemented here. */
16077 resolve_equivalence (gfc_equiv
*eq
)
16080 gfc_symbol
*first_sym
;
16083 locus
*last_where
= NULL
;
16084 seq_type eq_type
, last_eq_type
;
16085 gfc_typespec
*last_ts
;
16086 int object
, cnt_protected
;
16089 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16091 first_sym
= eq
->expr
->symtree
->n
.sym
;
16095 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16099 e
->ts
= e
->symtree
->n
.sym
->ts
;
16100 /* match_varspec might not know yet if it is seeing
16101 array reference or substring reference, as it doesn't
16103 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16105 gfc_ref
*ref
= e
->ref
;
16106 sym
= e
->symtree
->n
.sym
;
16108 if (sym
->attr
.dimension
)
16110 ref
->u
.ar
.as
= sym
->as
;
16114 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16115 if (e
->ts
.type
== BT_CHARACTER
16117 && ref
->type
== REF_ARRAY
16118 && ref
->u
.ar
.dimen
== 1
16119 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16120 && ref
->u
.ar
.stride
[0] == NULL
)
16122 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16123 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16126 /* Optimize away the (:) reference. */
16127 if (start
== NULL
&& end
== NULL
)
16130 e
->ref
= ref
->next
;
16132 e
->ref
->next
= ref
->next
;
16137 ref
->type
= REF_SUBSTRING
;
16139 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16141 ref
->u
.ss
.start
= start
;
16142 if (end
== NULL
&& e
->ts
.u
.cl
)
16143 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16144 ref
->u
.ss
.end
= end
;
16145 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16152 /* Any further ref is an error. */
16155 gcc_assert (ref
->type
== REF_ARRAY
);
16156 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16162 if (!gfc_resolve_expr (e
))
16165 sym
= e
->symtree
->n
.sym
;
16167 if (sym
->attr
.is_protected
)
16169 if (cnt_protected
> 0 && cnt_protected
!= object
)
16171 gfc_error ("Either all or none of the objects in the "
16172 "EQUIVALENCE set at %L shall have the "
16173 "PROTECTED attribute",
16178 /* Shall not equivalence common block variables in a PURE procedure. */
16179 if (sym
->ns
->proc_name
16180 && sym
->ns
->proc_name
->attr
.pure
16181 && sym
->attr
.in_common
)
16183 /* Need to check for symbols that may have entered the pure
16184 procedure via a USE statement. */
16185 bool saw_sym
= false;
16186 if (sym
->ns
->use_stmts
)
16189 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16190 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16196 gfc_error ("COMMON block member %qs at %L cannot be an "
16197 "EQUIVALENCE object in the pure procedure %qs",
16198 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16202 /* Shall not be a named constant. */
16203 if (e
->expr_type
== EXPR_CONSTANT
)
16205 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16206 "object", sym
->name
, &e
->where
);
16210 if (e
->ts
.type
== BT_DERIVED
16211 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16214 /* Check that the types correspond correctly:
16216 A numeric sequence structure may be equivalenced to another sequence
16217 structure, an object of default integer type, default real type, double
16218 precision real type, default logical type such that components of the
16219 structure ultimately only become associated to objects of the same
16220 kind. A character sequence structure may be equivalenced to an object
16221 of default character kind or another character sequence structure.
16222 Other objects may be equivalenced only to objects of the same type and
16223 kind parameters. */
16225 /* Identical types are unconditionally OK. */
16226 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16227 goto identical_types
;
16229 last_eq_type
= sequence_type (*last_ts
);
16230 eq_type
= sequence_type (sym
->ts
);
16232 /* Since the pair of objects is not of the same type, mixed or
16233 non-default sequences can be rejected. */
16235 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16236 "statement at %L with different type objects";
16238 && last_eq_type
== SEQ_MIXED
16239 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16240 || (eq_type
== SEQ_MIXED
16241 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16244 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16245 "statement at %L with objects of different type";
16247 && last_eq_type
== SEQ_NONDEFAULT
16248 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16249 || (eq_type
== SEQ_NONDEFAULT
16250 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16253 msg
="Non-CHARACTER object %qs in default CHARACTER "
16254 "EQUIVALENCE statement at %L";
16255 if (last_eq_type
== SEQ_CHARACTER
16256 && eq_type
!= SEQ_CHARACTER
16257 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16260 msg
="Non-NUMERIC object %qs in default NUMERIC "
16261 "EQUIVALENCE statement at %L";
16262 if (last_eq_type
== SEQ_NUMERIC
16263 && eq_type
!= SEQ_NUMERIC
16264 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16269 last_where
= &e
->where
;
16274 /* Shall not be an automatic array. */
16275 if (e
->ref
->type
== REF_ARRAY
16276 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16278 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16279 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16286 /* Shall not be a structure component. */
16287 if (r
->type
== REF_COMPONENT
)
16289 gfc_error ("Structure component %qs at %L cannot be an "
16290 "EQUIVALENCE object",
16291 r
->u
.c
.component
->name
, &e
->where
);
16295 /* A substring shall not have length zero. */
16296 if (r
->type
== REF_SUBSTRING
)
16298 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16300 gfc_error ("Substring at %L has length zero",
16301 &r
->u
.ss
.start
->where
);
16311 /* Function called by resolve_fntype to flag other symbol used in the
16312 length type parameter specification of function resuls. */
16315 flag_fn_result_spec (gfc_expr
*expr
,
16317 int *f ATTRIBUTE_UNUSED
)
16322 if (expr
->expr_type
== EXPR_VARIABLE
)
16324 s
= expr
->symtree
->n
.sym
;
16325 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16331 gfc_error ("Self reference in character length expression "
16332 "for %qs at %L", sym
->name
, &expr
->where
);
16336 if (!s
->fn_result_spec
16337 && s
->attr
.flavor
== FL_PARAMETER
)
16339 /* Function contained in a module.... */
16340 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16343 s
->fn_result_spec
= 1;
16344 /* Make sure that this symbol is translated as a module
16346 st
= gfc_get_unique_symtree (ns
);
16350 /* ... which is use associated and called. */
16351 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16353 /* External function matched with an interface. */
16356 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16357 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16358 && s
->ns
->proc_name
->attr
.function
))
16359 s
->fn_result_spec
= 1;
16366 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16369 resolve_fntype (gfc_namespace
*ns
)
16371 gfc_entry_list
*el
;
16374 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16377 /* If there are any entries, ns->proc_name is the entry master
16378 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16380 sym
= ns
->entries
->sym
;
16382 sym
= ns
->proc_name
;
16383 if (sym
->result
== sym
16384 && sym
->ts
.type
== BT_UNKNOWN
16385 && !gfc_set_default_type (sym
, 0, NULL
)
16386 && !sym
->attr
.untyped
)
16388 gfc_error ("Function %qs at %L has no IMPLICIT type",
16389 sym
->name
, &sym
->declared_at
);
16390 sym
->attr
.untyped
= 1;
16393 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16394 && !sym
->attr
.contained
16395 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16396 && gfc_check_symbol_access (sym
))
16398 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16399 "%L of PRIVATE type %qs", sym
->name
,
16400 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16404 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16406 if (el
->sym
->result
== el
->sym
16407 && el
->sym
->ts
.type
== BT_UNKNOWN
16408 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16409 && !el
->sym
->attr
.untyped
)
16411 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16412 el
->sym
->name
, &el
->sym
->declared_at
);
16413 el
->sym
->attr
.untyped
= 1;
16417 if (sym
->ts
.type
== BT_CHARACTER
)
16418 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16422 /* 12.3.2.1.1 Defined operators. */
16425 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16427 gfc_formal_arglist
*formal
;
16429 if (!sym
->attr
.function
)
16431 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16432 sym
->name
, &where
);
16436 if (sym
->ts
.type
== BT_CHARACTER
16437 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16438 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16439 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16441 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16442 "character length", sym
->name
, &where
);
16446 formal
= gfc_sym_get_dummy_args (sym
);
16447 if (!formal
|| !formal
->sym
)
16449 gfc_error ("User operator procedure %qs at %L must have at least "
16450 "one argument", sym
->name
, &where
);
16454 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16456 gfc_error ("First argument of operator interface at %L must be "
16457 "INTENT(IN)", &where
);
16461 if (formal
->sym
->attr
.optional
)
16463 gfc_error ("First argument of operator interface at %L cannot be "
16464 "optional", &where
);
16468 formal
= formal
->next
;
16469 if (!formal
|| !formal
->sym
)
16472 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16474 gfc_error ("Second argument of operator interface at %L must be "
16475 "INTENT(IN)", &where
);
16479 if (formal
->sym
->attr
.optional
)
16481 gfc_error ("Second argument of operator interface at %L cannot be "
16482 "optional", &where
);
16488 gfc_error ("Operator interface at %L must have, at most, two "
16489 "arguments", &where
);
16497 gfc_resolve_uops (gfc_symtree
*symtree
)
16499 gfc_interface
*itr
;
16501 if (symtree
== NULL
)
16504 gfc_resolve_uops (symtree
->left
);
16505 gfc_resolve_uops (symtree
->right
);
16507 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16508 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16512 /* Examine all of the expressions associated with a program unit,
16513 assign types to all intermediate expressions, make sure that all
16514 assignments are to compatible types and figure out which names
16515 refer to which functions or subroutines. It doesn't check code
16516 block, which is handled by gfc_resolve_code. */
16519 resolve_types (gfc_namespace
*ns
)
16525 gfc_namespace
* old_ns
= gfc_current_ns
;
16527 if (ns
->types_resolved
)
16530 /* Check that all IMPLICIT types are ok. */
16531 if (!ns
->seen_implicit_none
)
16534 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16535 if (ns
->set_flag
[letter
]
16536 && !resolve_typespec_used (&ns
->default_type
[letter
],
16537 &ns
->implicit_loc
[letter
], NULL
))
16541 gfc_current_ns
= ns
;
16543 resolve_entries (ns
);
16545 resolve_common_vars (&ns
->blank_common
, false);
16546 resolve_common_blocks (ns
->common_root
);
16548 resolve_contained_functions (ns
);
16550 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16551 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16552 resolve_formal_arglist (ns
->proc_name
);
16554 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16556 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16557 resolve_charlen (cl
);
16559 gfc_traverse_ns (ns
, resolve_symbol
);
16561 resolve_fntype (ns
);
16563 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16565 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16566 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16567 "also be PURE", n
->proc_name
->name
,
16568 &n
->proc_name
->declared_at
);
16574 gfc_do_concurrent_flag
= 0;
16575 gfc_check_interfaces (ns
);
16577 gfc_traverse_ns (ns
, resolve_values
);
16583 for (d
= ns
->data
; d
; d
= d
->next
)
16587 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16589 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16591 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16592 resolve_equivalence (eq
);
16594 /* Warn about unused labels. */
16595 if (warn_unused_label
)
16596 warn_unused_fortran_label (ns
->st_labels
);
16598 gfc_resolve_uops (ns
->uop_root
);
16600 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16602 gfc_resolve_omp_declare_simd (ns
);
16604 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16606 ns
->types_resolved
= 1;
16608 gfc_current_ns
= old_ns
;
16612 /* Call gfc_resolve_code recursively. */
16615 resolve_codes (gfc_namespace
*ns
)
16618 bitmap_obstack old_obstack
;
16620 if (ns
->resolved
== 1)
16623 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16626 gfc_current_ns
= ns
;
16628 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16629 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16632 /* Set to an out of range value. */
16633 current_entry_id
= -1;
16635 old_obstack
= labels_obstack
;
16636 bitmap_obstack_initialize (&labels_obstack
);
16638 gfc_resolve_oacc_declare (ns
);
16639 gfc_resolve_omp_local_vars (ns
);
16640 gfc_resolve_code (ns
->code
, ns
);
16642 bitmap_obstack_release (&labels_obstack
);
16643 labels_obstack
= old_obstack
;
16647 /* This function is called after a complete program unit has been compiled.
16648 Its purpose is to examine all of the expressions associated with a program
16649 unit, assign types to all intermediate expressions, make sure that all
16650 assignments are to compatible types and figure out which names refer to
16651 which functions or subroutines. */
16654 gfc_resolve (gfc_namespace
*ns
)
16656 gfc_namespace
*old_ns
;
16657 code_stack
*old_cs_base
;
16658 struct gfc_omp_saved_state old_omp_state
;
16664 old_ns
= gfc_current_ns
;
16665 old_cs_base
= cs_base
;
16667 /* As gfc_resolve can be called during resolution of an OpenMP construct
16668 body, we should clear any state associated to it, so that say NS's
16669 DO loops are not interpreted as OpenMP loops. */
16670 if (!ns
->construct_entities
)
16671 gfc_omp_save_and_clear_state (&old_omp_state
);
16673 resolve_types (ns
);
16674 component_assignment_level
= 0;
16675 resolve_codes (ns
);
16677 gfc_current_ns
= old_ns
;
16678 cs_base
= old_cs_base
;
16681 gfc_run_passes (ns
);
16683 if (!ns
->construct_entities
)
16684 gfc_omp_restore_state (&old_omp_state
);