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_dt_list
*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 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
;
2986 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2987 int *f ATTRIBUTE_UNUSED
)
2991 /* Don't bother recursing into other statement functions
2992 since they will be checked individually for purity. */
2993 if (e
->expr_type
!= EXPR_FUNCTION
2995 || e
->symtree
->n
.sym
== sym
2996 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2999 return pure_function (e
, &name
) ? false : true;
3004 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3006 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3010 /* Check if an impure function is allowed in the current context. */
3012 static bool check_pure_function (gfc_expr
*e
)
3014 const char *name
= NULL
;
3015 if (!pure_function (e
, &name
) && name
)
3019 gfc_error ("Reference to impure function %qs at %L inside a "
3020 "FORALL %s", name
, &e
->where
,
3021 forall_flag
== 2 ? "mask" : "block");
3024 else if (gfc_do_concurrent_flag
)
3026 gfc_error ("Reference to impure function %qs at %L inside a "
3027 "DO CONCURRENT %s", name
, &e
->where
,
3028 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3031 else if (gfc_pure (NULL
))
3033 gfc_error ("Reference to impure function %qs at %L "
3034 "within a PURE procedure", name
, &e
->where
);
3037 gfc_unset_implicit_pure (NULL
);
3043 /* Update current procedure's array_outer_dependency flag, considering
3044 a call to procedure SYM. */
3047 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3049 /* Check to see if this is a sibling function that has not yet
3051 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3052 for (; sibling
; sibling
= sibling
->sibling
)
3054 if (sibling
->proc_name
== sym
)
3056 gfc_resolve (sibling
);
3061 /* If SYM has references to outer arrays, so has the procedure calling
3062 SYM. If SYM is a procedure pointer, we can assume the worst. */
3063 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3064 && gfc_current_ns
->proc_name
)
3065 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3069 /* Resolve a function call, which means resolving the arguments, then figuring
3070 out which entity the name refers to. */
3073 resolve_function (gfc_expr
*expr
)
3075 gfc_actual_arglist
*arg
;
3079 procedure_type p
= PROC_INTRINSIC
;
3080 bool no_formal_args
;
3084 sym
= expr
->symtree
->n
.sym
;
3086 /* If this is a procedure pointer component, it has already been resolved. */
3087 if (gfc_is_proc_ptr_comp (expr
))
3090 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3092 if (sym
&& sym
->attr
.intrinsic
3093 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3094 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3097 if (sym
&& sym
->attr
.intrinsic
3098 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3101 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3103 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3107 /* If this is a deferred TBP with an abstract interface (which may
3108 of course be referenced), expr->value.function.esym will be set. */
3109 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3111 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3112 sym
->name
, &expr
->where
);
3116 /* If this is a deferred TBP with an abstract interface, its result
3117 cannot be an assumed length character (F2003: C418). */
3118 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3119 && sym
->result
->ts
.u
.cl
3120 && sym
->result
->ts
.u
.cl
->length
== NULL
3121 && !sym
->result
->ts
.deferred
)
3123 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3124 "character length result (F2008: C418)", sym
->name
,
3129 /* Switch off assumed size checking and do this again for certain kinds
3130 of procedure, once the procedure itself is resolved. */
3131 need_full_assumed_size
++;
3133 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3134 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3136 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3137 inquiry_argument
= true;
3138 no_formal_args
= sym
&& is_external_proc (sym
)
3139 && gfc_sym_get_dummy_args (sym
) == NULL
;
3141 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3144 inquiry_argument
= false;
3148 inquiry_argument
= false;
3150 /* Resume assumed_size checking. */
3151 need_full_assumed_size
--;
3153 /* If the procedure is external, check for usage. */
3154 if (sym
&& is_external_proc (sym
))
3155 resolve_global_procedure (sym
, &expr
->where
,
3156 &expr
->value
.function
.actual
, 0);
3158 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3160 && sym
->ts
.u
.cl
->length
== NULL
3162 && !sym
->ts
.deferred
3163 && expr
->value
.function
.esym
== NULL
3164 && !sym
->attr
.contained
)
3166 /* Internal procedures are taken care of in resolve_contained_fntype. */
3167 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3168 "be used at %L since it is not a dummy argument",
3169 sym
->name
, &expr
->where
);
3173 /* See if function is already resolved. */
3175 if (expr
->value
.function
.name
!= NULL
3176 || expr
->value
.function
.isym
!= NULL
)
3178 if (expr
->ts
.type
== BT_UNKNOWN
)
3184 /* Apply the rules of section 14.1.2. */
3186 switch (procedure_kind (sym
))
3189 t
= resolve_generic_f (expr
);
3192 case PTYPE_SPECIFIC
:
3193 t
= resolve_specific_f (expr
);
3197 t
= resolve_unknown_f (expr
);
3201 gfc_internal_error ("resolve_function(): bad function type");
3205 /* If the expression is still a function (it might have simplified),
3206 then we check to see if we are calling an elemental function. */
3208 if (expr
->expr_type
!= EXPR_FUNCTION
)
3211 temp
= need_full_assumed_size
;
3212 need_full_assumed_size
= 0;
3214 if (!resolve_elemental_actual (expr
, NULL
))
3217 if (omp_workshare_flag
3218 && expr
->value
.function
.esym
3219 && ! gfc_elemental (expr
->value
.function
.esym
))
3221 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3222 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3227 #define GENERIC_ID expr->value.function.isym->id
3228 else if (expr
->value
.function
.actual
!= NULL
3229 && expr
->value
.function
.isym
!= NULL
3230 && GENERIC_ID
!= GFC_ISYM_LBOUND
3231 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3232 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3233 && GENERIC_ID
!= GFC_ISYM_LEN
3234 && GENERIC_ID
!= GFC_ISYM_LOC
3235 && GENERIC_ID
!= GFC_ISYM_C_LOC
3236 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3238 /* Array intrinsics must also have the last upper bound of an
3239 assumed size array argument. UBOUND and SIZE have to be
3240 excluded from the check if the second argument is anything
3243 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3245 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3246 && arg
== expr
->value
.function
.actual
3247 && arg
->next
!= NULL
&& arg
->next
->expr
)
3249 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3252 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3255 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3260 if (arg
->expr
!= NULL
3261 && arg
->expr
->rank
> 0
3262 && resolve_assumed_size_actual (arg
->expr
))
3268 need_full_assumed_size
= temp
;
3270 if (!check_pure_function(expr
))
3273 /* Functions without the RECURSIVE attribution are not allowed to
3274 * call themselves. */
3275 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3278 esym
= expr
->value
.function
.esym
;
3280 if (is_illegal_recursion (esym
, gfc_current_ns
))
3282 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3283 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3284 " function %qs is not RECURSIVE",
3285 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3287 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3288 " is not RECURSIVE", esym
->name
, &expr
->where
);
3294 /* Character lengths of use associated functions may contains references to
3295 symbols not referenced from the current program unit otherwise. Make sure
3296 those symbols are marked as referenced. */
3298 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3299 && expr
->value
.function
.esym
->attr
.use_assoc
)
3301 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3304 /* Make sure that the expression has a typespec that works. */
3305 if (expr
->ts
.type
== BT_UNKNOWN
)
3307 if (expr
->symtree
->n
.sym
->result
3308 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3309 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3310 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3313 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3315 if (expr
->value
.function
.esym
)
3316 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3318 update_current_proc_array_outer_dependency (sym
);
3321 /* typebound procedure: Assume the worst. */
3322 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3328 /************* Subroutine resolution *************/
3331 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3338 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3342 else if (gfc_do_concurrent_flag
)
3344 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3348 else if (gfc_pure (NULL
))
3350 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3354 gfc_unset_implicit_pure (NULL
);
3360 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3364 if (sym
->attr
.generic
)
3366 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3369 c
->resolved_sym
= s
;
3370 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3375 /* TODO: Need to search for elemental references in generic interface. */
3378 if (sym
->attr
.intrinsic
)
3379 return gfc_intrinsic_sub_interface (c
, 0);
3386 resolve_generic_s (gfc_code
*c
)
3391 sym
= c
->symtree
->n
.sym
;
3395 m
= resolve_generic_s0 (c
, sym
);
3398 else if (m
== MATCH_ERROR
)
3402 if (sym
->ns
->parent
== NULL
)
3404 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3408 if (!generic_sym (sym
))
3412 /* Last ditch attempt. See if the reference is to an intrinsic
3413 that possesses a matching interface. 14.1.2.4 */
3414 sym
= c
->symtree
->n
.sym
;
3416 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3418 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3419 sym
->name
, &c
->loc
);
3423 m
= gfc_intrinsic_sub_interface (c
, 0);
3427 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3428 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3434 /* Resolve a subroutine call known to be specific. */
3437 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3441 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3443 if (sym
->attr
.dummy
)
3445 sym
->attr
.proc
= PROC_DUMMY
;
3449 sym
->attr
.proc
= PROC_EXTERNAL
;
3453 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3456 if (sym
->attr
.intrinsic
)
3458 m
= gfc_intrinsic_sub_interface (c
, 1);
3462 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3463 "with an intrinsic", sym
->name
, &c
->loc
);
3471 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3473 c
->resolved_sym
= sym
;
3474 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3482 resolve_specific_s (gfc_code
*c
)
3487 sym
= c
->symtree
->n
.sym
;
3491 m
= resolve_specific_s0 (c
, sym
);
3494 if (m
== MATCH_ERROR
)
3497 if (sym
->ns
->parent
== NULL
)
3500 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3506 sym
= c
->symtree
->n
.sym
;
3507 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3508 sym
->name
, &c
->loc
);
3514 /* Resolve a subroutine call not known to be generic nor specific. */
3517 resolve_unknown_s (gfc_code
*c
)
3521 sym
= c
->symtree
->n
.sym
;
3523 if (sym
->attr
.dummy
)
3525 sym
->attr
.proc
= PROC_DUMMY
;
3529 /* See if we have an intrinsic function reference. */
3531 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3533 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3538 /* The reference is to an external name. */
3541 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3543 c
->resolved_sym
= sym
;
3545 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3549 /* Resolve a subroutine call. Although it was tempting to use the same code
3550 for functions, subroutines and functions are stored differently and this
3551 makes things awkward. */
3554 resolve_call (gfc_code
*c
)
3557 procedure_type ptype
= PROC_INTRINSIC
;
3558 gfc_symbol
*csym
, *sym
;
3559 bool no_formal_args
;
3561 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3563 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3565 gfc_error ("%qs at %L has a type, which is not consistent with "
3566 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3570 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3573 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3574 sym
= st
? st
->n
.sym
: NULL
;
3575 if (sym
&& csym
!= sym
3576 && sym
->ns
== gfc_current_ns
3577 && sym
->attr
.flavor
== FL_PROCEDURE
3578 && sym
->attr
.contained
)
3581 if (csym
->attr
.generic
)
3582 c
->symtree
->n
.sym
= sym
;
3585 csym
= c
->symtree
->n
.sym
;
3589 /* If this ia a deferred TBP, c->expr1 will be set. */
3590 if (!c
->expr1
&& csym
)
3592 if (csym
->attr
.abstract
)
3594 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3595 csym
->name
, &c
->loc
);
3599 /* Subroutines without the RECURSIVE attribution are not allowed to
3601 if (is_illegal_recursion (csym
, gfc_current_ns
))
3603 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3604 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3605 "as subroutine %qs is not RECURSIVE",
3606 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3608 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3609 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3615 /* Switch off assumed size checking and do this again for certain kinds
3616 of procedure, once the procedure itself is resolved. */
3617 need_full_assumed_size
++;
3620 ptype
= csym
->attr
.proc
;
3622 no_formal_args
= csym
&& is_external_proc (csym
)
3623 && gfc_sym_get_dummy_args (csym
) == NULL
;
3624 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3627 /* Resume assumed_size checking. */
3628 need_full_assumed_size
--;
3630 /* If external, check for usage. */
3631 if (csym
&& is_external_proc (csym
))
3632 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3635 if (c
->resolved_sym
== NULL
)
3637 c
->resolved_isym
= NULL
;
3638 switch (procedure_kind (csym
))
3641 t
= resolve_generic_s (c
);
3644 case PTYPE_SPECIFIC
:
3645 t
= resolve_specific_s (c
);
3649 t
= resolve_unknown_s (c
);
3653 gfc_internal_error ("resolve_subroutine(): bad function type");
3657 /* Some checks of elemental subroutine actual arguments. */
3658 if (!resolve_elemental_actual (NULL
, c
))
3662 update_current_proc_array_outer_dependency (csym
);
3664 /* Typebound procedure: Assume the worst. */
3665 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3671 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3672 op1->shape and op2->shape are non-NULL return true if their shapes
3673 match. If both op1->shape and op2->shape are non-NULL return false
3674 if their shapes do not match. If either op1->shape or op2->shape is
3675 NULL, return true. */
3678 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3685 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3687 for (i
= 0; i
< op1
->rank
; i
++)
3689 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3691 gfc_error ("Shapes for operands at %L and %L are not conformable",
3692 &op1
->where
, &op2
->where
);
3702 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3703 For example A .AND. B becomes IAND(A, B). */
3705 logical_to_bitwise (gfc_expr
*e
)
3707 gfc_expr
*tmp
, *op1
, *op2
;
3709 gfc_actual_arglist
*args
= NULL
;
3711 gcc_assert (e
->expr_type
== EXPR_OP
);
3713 isym
= GFC_ISYM_NONE
;
3714 op1
= e
->value
.op
.op1
;
3715 op2
= e
->value
.op
.op2
;
3717 switch (e
->value
.op
.op
)
3720 isym
= GFC_ISYM_NOT
;
3723 isym
= GFC_ISYM_IAND
;
3726 isym
= GFC_ISYM_IOR
;
3728 case INTRINSIC_NEQV
:
3729 isym
= GFC_ISYM_IEOR
;
3732 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3733 Change the old expression to NEQV, which will get replaced by IEOR,
3734 and wrap it in NOT. */
3735 tmp
= gfc_copy_expr (e
);
3736 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3737 tmp
= logical_to_bitwise (tmp
);
3738 isym
= GFC_ISYM_NOT
;
3743 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3746 /* Inherit the original operation's operands as arguments. */
3747 args
= gfc_get_actual_arglist ();
3751 args
->next
= gfc_get_actual_arglist ();
3752 args
->next
->expr
= op2
;
3755 /* Convert the expression to a function call. */
3756 e
->expr_type
= EXPR_FUNCTION
;
3757 e
->value
.function
.actual
= args
;
3758 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3759 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3760 e
->value
.function
.esym
= NULL
;
3762 /* Make up a pre-resolved function call symtree if we need to. */
3763 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3766 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3767 sym
= e
->symtree
->n
.sym
;
3769 sym
->attr
.flavor
= FL_PROCEDURE
;
3770 sym
->attr
.function
= 1;
3771 sym
->attr
.elemental
= 1;
3773 sym
->attr
.referenced
= 1;
3774 gfc_intrinsic_symbol (sym
);
3775 gfc_commit_symbol (sym
);
3778 args
->name
= e
->value
.function
.isym
->formal
->name
;
3779 if (e
->value
.function
.isym
->formal
->next
)
3780 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3785 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3786 candidates in CANDIDATES_LEN. */
3788 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3790 size_t &candidates_len
)
3797 /* Not sure how to properly filter here. Use all for a start.
3798 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3799 these as i suppose they don't make terribly sense. */
3801 if (uop
->n
.uop
->op
!= NULL
)
3802 vec_push (candidates
, candidates_len
, uop
->name
);
3806 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3810 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3813 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3816 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3818 char **candidates
= NULL
;
3819 size_t candidates_len
= 0;
3820 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3821 return gfc_closest_fuzzy_match (op
, candidates
);
3825 /* Resolve an operator expression node. This can involve replacing the
3826 operation with a user defined function call. */
3829 resolve_operator (gfc_expr
*e
)
3831 gfc_expr
*op1
, *op2
;
3833 bool dual_locus_error
;
3836 /* Resolve all subnodes-- give them types. */
3838 switch (e
->value
.op
.op
)
3841 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3847 case INTRINSIC_UPLUS
:
3848 case INTRINSIC_UMINUS
:
3849 case INTRINSIC_PARENTHESES
:
3850 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3855 /* Typecheck the new node. */
3857 op1
= e
->value
.op
.op1
;
3858 op2
= e
->value
.op
.op2
;
3859 dual_locus_error
= false;
3861 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3862 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3864 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3868 switch (e
->value
.op
.op
)
3870 case INTRINSIC_UPLUS
:
3871 case INTRINSIC_UMINUS
:
3872 if (op1
->ts
.type
== BT_INTEGER
3873 || op1
->ts
.type
== BT_REAL
3874 || op1
->ts
.type
== BT_COMPLEX
)
3880 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3881 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3884 case INTRINSIC_PLUS
:
3885 case INTRINSIC_MINUS
:
3886 case INTRINSIC_TIMES
:
3887 case INTRINSIC_DIVIDE
:
3888 case INTRINSIC_POWER
:
3889 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3891 gfc_type_convert_binary (e
, 1);
3895 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3897 _("Unexpected derived-type entities in binary intrinsic "
3898 "numeric operator %%<%s%%> at %%L"),
3899 gfc_op2string (e
->value
.op
.op
));
3902 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3903 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3904 gfc_typename (&op2
->ts
));
3907 case INTRINSIC_CONCAT
:
3908 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3909 && op1
->ts
.kind
== op2
->ts
.kind
)
3911 e
->ts
.type
= BT_CHARACTER
;
3912 e
->ts
.kind
= op1
->ts
.kind
;
3917 _("Operands of string concatenation operator at %%L are %s/%s"),
3918 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3924 case INTRINSIC_NEQV
:
3925 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3927 e
->ts
.type
= BT_LOGICAL
;
3928 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3929 if (op1
->ts
.kind
< e
->ts
.kind
)
3930 gfc_convert_type (op1
, &e
->ts
, 2);
3931 else if (op2
->ts
.kind
< e
->ts
.kind
)
3932 gfc_convert_type (op2
, &e
->ts
, 2);
3936 /* Logical ops on integers become bitwise ops with -fdec. */
3938 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3940 e
->ts
.type
= BT_INTEGER
;
3941 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3942 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3943 gfc_convert_type (op1
, &e
->ts
, 1);
3944 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3945 gfc_convert_type (op2
, &e
->ts
, 1);
3946 e
= logical_to_bitwise (e
);
3947 return resolve_function (e
);
3950 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3951 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3952 gfc_typename (&op2
->ts
));
3957 /* Logical ops on integers become bitwise ops with -fdec. */
3958 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3960 e
->ts
.type
= BT_INTEGER
;
3961 e
->ts
.kind
= op1
->ts
.kind
;
3962 e
= logical_to_bitwise (e
);
3963 return resolve_function (e
);
3966 if (op1
->ts
.type
== BT_LOGICAL
)
3968 e
->ts
.type
= BT_LOGICAL
;
3969 e
->ts
.kind
= op1
->ts
.kind
;
3973 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3974 gfc_typename (&op1
->ts
));
3978 case INTRINSIC_GT_OS
:
3980 case INTRINSIC_GE_OS
:
3982 case INTRINSIC_LT_OS
:
3984 case INTRINSIC_LE_OS
:
3985 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3987 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3994 case INTRINSIC_EQ_OS
:
3996 case INTRINSIC_NE_OS
:
3997 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3998 && op1
->ts
.kind
== op2
->ts
.kind
)
4000 e
->ts
.type
= BT_LOGICAL
;
4001 e
->ts
.kind
= gfc_default_logical_kind
;
4005 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4007 gfc_type_convert_binary (e
, 1);
4009 e
->ts
.type
= BT_LOGICAL
;
4010 e
->ts
.kind
= gfc_default_logical_kind
;
4012 if (warn_compare_reals
)
4014 gfc_intrinsic_op op
= e
->value
.op
.op
;
4016 /* Type conversion has made sure that the types of op1 and op2
4017 agree, so it is only necessary to check the first one. */
4018 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4019 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4020 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4024 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4025 msg
= "Equality comparison for %s at %L";
4027 msg
= "Inequality comparison for %s at %L";
4029 gfc_warning (OPT_Wcompare_reals
, msg
,
4030 gfc_typename (&op1
->ts
), &op1
->where
);
4037 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4039 _("Logicals at %%L must be compared with %s instead of %s"),
4040 (e
->value
.op
.op
== INTRINSIC_EQ
4041 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4042 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4045 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4046 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4047 gfc_typename (&op2
->ts
));
4051 case INTRINSIC_USER
:
4052 if (e
->value
.op
.uop
->op
== NULL
)
4054 const char *name
= e
->value
.op
.uop
->name
;
4055 const char *guessed
;
4056 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4058 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4061 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4063 else if (op2
== NULL
)
4064 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4065 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4068 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4069 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4070 gfc_typename (&op2
->ts
));
4071 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4076 case INTRINSIC_PARENTHESES
:
4078 if (e
->ts
.type
== BT_CHARACTER
)
4079 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4083 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4086 /* Deal with arrayness of an operand through an operator. */
4090 switch (e
->value
.op
.op
)
4092 case INTRINSIC_PLUS
:
4093 case INTRINSIC_MINUS
:
4094 case INTRINSIC_TIMES
:
4095 case INTRINSIC_DIVIDE
:
4096 case INTRINSIC_POWER
:
4097 case INTRINSIC_CONCAT
:
4101 case INTRINSIC_NEQV
:
4103 case INTRINSIC_EQ_OS
:
4105 case INTRINSIC_NE_OS
:
4107 case INTRINSIC_GT_OS
:
4109 case INTRINSIC_GE_OS
:
4111 case INTRINSIC_LT_OS
:
4113 case INTRINSIC_LE_OS
:
4115 if (op1
->rank
== 0 && op2
->rank
== 0)
4118 if (op1
->rank
== 0 && op2
->rank
!= 0)
4120 e
->rank
= op2
->rank
;
4122 if (e
->shape
== NULL
)
4123 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4126 if (op1
->rank
!= 0 && op2
->rank
== 0)
4128 e
->rank
= op1
->rank
;
4130 if (e
->shape
== NULL
)
4131 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4134 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4136 if (op1
->rank
== op2
->rank
)
4138 e
->rank
= op1
->rank
;
4139 if (e
->shape
== NULL
)
4141 t
= compare_shapes (op1
, op2
);
4145 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4150 /* Allow higher level expressions to work. */
4153 /* Try user-defined operators, and otherwise throw an error. */
4154 dual_locus_error
= true;
4156 _("Inconsistent ranks for operator at %%L and %%L"));
4163 case INTRINSIC_PARENTHESES
:
4165 case INTRINSIC_UPLUS
:
4166 case INTRINSIC_UMINUS
:
4167 /* Simply copy arrayness attribute */
4168 e
->rank
= op1
->rank
;
4170 if (e
->shape
== NULL
)
4171 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4179 /* Attempt to simplify the expression. */
4182 t
= gfc_simplify_expr (e
, 0);
4183 /* Some calls do not succeed in simplification and return false
4184 even though there is no error; e.g. variable references to
4185 PARAMETER arrays. */
4186 if (!gfc_is_constant_expr (e
))
4194 match m
= gfc_extend_expr (e
);
4197 if (m
== MATCH_ERROR
)
4201 if (dual_locus_error
)
4202 gfc_error (msg
, &op1
->where
, &op2
->where
);
4204 gfc_error (msg
, &e
->where
);
4210 /************** Array resolution subroutines **************/
4213 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4215 /* Compare two integer expressions. */
4217 static compare_result
4218 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4222 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4223 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4226 /* If either of the types isn't INTEGER, we must have
4227 raised an error earlier. */
4229 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4232 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4242 /* Compare an integer expression with an integer. */
4244 static compare_result
4245 compare_bound_int (gfc_expr
*a
, int b
)
4249 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4252 if (a
->ts
.type
!= BT_INTEGER
)
4253 gfc_internal_error ("compare_bound_int(): Bad expression");
4255 i
= mpz_cmp_si (a
->value
.integer
, b
);
4265 /* Compare an integer expression with a mpz_t. */
4267 static compare_result
4268 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4272 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4275 if (a
->ts
.type
!= BT_INTEGER
)
4276 gfc_internal_error ("compare_bound_int(): Bad expression");
4278 i
= mpz_cmp (a
->value
.integer
, b
);
4288 /* Compute the last value of a sequence given by a triplet.
4289 Return 0 if it wasn't able to compute the last value, or if the
4290 sequence if empty, and 1 otherwise. */
4293 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4294 gfc_expr
*stride
, mpz_t last
)
4298 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4299 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4300 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4303 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4304 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4307 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4309 if (compare_bound (start
, end
) == CMP_GT
)
4311 mpz_set (last
, end
->value
.integer
);
4315 if (compare_bound_int (stride
, 0) == CMP_GT
)
4317 /* Stride is positive */
4318 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4323 /* Stride is negative */
4324 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4329 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4330 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4331 mpz_sub (last
, end
->value
.integer
, rem
);
4338 /* Compare a single dimension of an array reference to the array
4342 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4346 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4348 gcc_assert (ar
->stride
[i
] == NULL
);
4349 /* This implies [*] as [*:] and [*:3] are not possible. */
4350 if (ar
->start
[i
] == NULL
)
4352 gcc_assert (ar
->end
[i
] == NULL
);
4357 /* Given start, end and stride values, calculate the minimum and
4358 maximum referenced indexes. */
4360 switch (ar
->dimen_type
[i
])
4363 case DIMEN_THIS_IMAGE
:
4368 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4371 gfc_warning (0, "Array reference at %L is out of bounds "
4372 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4373 mpz_get_si (ar
->start
[i
]->value
.integer
),
4374 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4376 gfc_warning (0, "Array reference at %L is out of bounds "
4377 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4378 mpz_get_si (ar
->start
[i
]->value
.integer
),
4379 mpz_get_si (as
->lower
[i
]->value
.integer
),
4383 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4386 gfc_warning (0, "Array reference at %L is out of bounds "
4387 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4388 mpz_get_si (ar
->start
[i
]->value
.integer
),
4389 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4391 gfc_warning (0, "Array reference at %L is out of bounds "
4392 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4393 mpz_get_si (ar
->start
[i
]->value
.integer
),
4394 mpz_get_si (as
->upper
[i
]->value
.integer
),
4403 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4404 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4406 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4408 /* Check for zero stride, which is not allowed. */
4409 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4411 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4415 /* if start == len || (stride > 0 && start < len)
4416 || (stride < 0 && start > len),
4417 then the array section contains at least one element. In this
4418 case, there is an out-of-bounds access if
4419 (start < lower || start > upper). */
4420 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4421 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4422 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4423 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4424 && comp_start_end
== CMP_GT
))
4426 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4428 gfc_warning (0, "Lower array reference at %L is out of bounds "
4429 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4430 mpz_get_si (AR_START
->value
.integer
),
4431 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4434 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4436 gfc_warning (0, "Lower array reference at %L is out of bounds "
4437 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4438 mpz_get_si (AR_START
->value
.integer
),
4439 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4444 /* If we can compute the highest index of the array section,
4445 then it also has to be between lower and upper. */
4446 mpz_init (last_value
);
4447 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4450 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4452 gfc_warning (0, "Upper array reference at %L is out of bounds "
4453 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4454 mpz_get_si (last_value
),
4455 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4456 mpz_clear (last_value
);
4459 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4461 gfc_warning (0, "Upper array reference at %L is out of bounds "
4462 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4463 mpz_get_si (last_value
),
4464 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4465 mpz_clear (last_value
);
4469 mpz_clear (last_value
);
4477 gfc_internal_error ("check_dimension(): Bad array reference");
4484 /* Compare an array reference with an array specification. */
4487 compare_spec_to_ref (gfc_array_ref
*ar
)
4494 /* TODO: Full array sections are only allowed as actual parameters. */
4495 if (as
->type
== AS_ASSUMED_SIZE
4496 && (/*ar->type == AR_FULL
4497 ||*/ (ar
->type
== AR_SECTION
4498 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4500 gfc_error ("Rightmost upper bound of assumed size array section "
4501 "not specified at %L", &ar
->where
);
4505 if (ar
->type
== AR_FULL
)
4508 if (as
->rank
!= ar
->dimen
)
4510 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4511 &ar
->where
, ar
->dimen
, as
->rank
);
4515 /* ar->codimen == 0 is a local array. */
4516 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4518 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4519 &ar
->where
, ar
->codimen
, as
->corank
);
4523 for (i
= 0; i
< as
->rank
; i
++)
4524 if (!check_dimension (i
, ar
, as
))
4527 /* Local access has no coarray spec. */
4528 if (ar
->codimen
!= 0)
4529 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4531 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4532 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4534 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4535 i
+ 1 - as
->rank
, &ar
->where
);
4538 if (!check_dimension (i
, ar
, as
))
4546 /* Resolve one part of an array index. */
4549 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4550 int force_index_integer_kind
)
4557 if (!gfc_resolve_expr (index
))
4560 if (check_scalar
&& index
->rank
!= 0)
4562 gfc_error ("Array index at %L must be scalar", &index
->where
);
4566 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4568 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4569 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4573 if (index
->ts
.type
== BT_REAL
)
4574 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4578 if ((index
->ts
.kind
!= gfc_index_integer_kind
4579 && force_index_integer_kind
)
4580 || index
->ts
.type
!= BT_INTEGER
)
4583 ts
.type
= BT_INTEGER
;
4584 ts
.kind
= gfc_index_integer_kind
;
4586 gfc_convert_type_warn (index
, &ts
, 2, 0);
4592 /* Resolve one part of an array index. */
4595 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4597 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4600 /* Resolve a dim argument to an intrinsic function. */
4603 gfc_resolve_dim_arg (gfc_expr
*dim
)
4608 if (!gfc_resolve_expr (dim
))
4613 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4618 if (dim
->ts
.type
!= BT_INTEGER
)
4620 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4624 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4629 ts
.type
= BT_INTEGER
;
4630 ts
.kind
= gfc_index_integer_kind
;
4632 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4638 /* Given an expression that contains array references, update those array
4639 references to point to the right array specifications. While this is
4640 filled in during matching, this information is difficult to save and load
4641 in a module, so we take care of it here.
4643 The idea here is that the original array reference comes from the
4644 base symbol. We traverse the list of reference structures, setting
4645 the stored reference to references. Component references can
4646 provide an additional array specification. */
4649 find_array_spec (gfc_expr
*e
)
4655 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4656 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4658 as
= e
->symtree
->n
.sym
->as
;
4660 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4665 gfc_internal_error ("find_array_spec(): Missing spec");
4672 c
= ref
->u
.c
.component
;
4673 if (c
->attr
.dimension
)
4676 gfc_internal_error ("find_array_spec(): unused as(1)");
4687 gfc_internal_error ("find_array_spec(): unused as(2)");
4691 /* Resolve an array reference. */
4694 resolve_array_ref (gfc_array_ref
*ar
)
4696 int i
, check_scalar
;
4699 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4701 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4703 /* Do not force gfc_index_integer_kind for the start. We can
4704 do fine with any integer kind. This avoids temporary arrays
4705 created for indexing with a vector. */
4706 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4708 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4710 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4715 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4719 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4723 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4724 if (e
->expr_type
== EXPR_VARIABLE
4725 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4726 ar
->start
[i
] = gfc_get_parentheses (e
);
4730 gfc_error ("Array index at %L is an array of rank %d",
4731 &ar
->c_where
[i
], e
->rank
);
4735 /* Fill in the upper bound, which may be lower than the
4736 specified one for something like a(2:10:5), which is
4737 identical to a(2:7:5). Only relevant for strides not equal
4738 to one. Don't try a division by zero. */
4739 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4740 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4741 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4742 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4746 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4748 if (ar
->end
[i
] == NULL
)
4751 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4753 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4755 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4756 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4758 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4769 if (ar
->type
== AR_FULL
)
4771 if (ar
->as
->rank
== 0)
4772 ar
->type
= AR_ELEMENT
;
4774 /* Make sure array is the same as array(:,:), this way
4775 we don't need to special case all the time. */
4776 ar
->dimen
= ar
->as
->rank
;
4777 for (i
= 0; i
< ar
->dimen
; i
++)
4779 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4781 gcc_assert (ar
->start
[i
] == NULL
);
4782 gcc_assert (ar
->end
[i
] == NULL
);
4783 gcc_assert (ar
->stride
[i
] == NULL
);
4787 /* If the reference type is unknown, figure out what kind it is. */
4789 if (ar
->type
== AR_UNKNOWN
)
4791 ar
->type
= AR_ELEMENT
;
4792 for (i
= 0; i
< ar
->dimen
; i
++)
4793 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4794 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4796 ar
->type
= AR_SECTION
;
4801 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4804 if (ar
->as
->corank
&& ar
->codimen
== 0)
4807 ar
->codimen
= ar
->as
->corank
;
4808 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4809 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4817 resolve_substring (gfc_ref
*ref
)
4819 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4821 if (ref
->u
.ss
.start
!= NULL
)
4823 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4826 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4828 gfc_error ("Substring start index at %L must be of type INTEGER",
4829 &ref
->u
.ss
.start
->where
);
4833 if (ref
->u
.ss
.start
->rank
!= 0)
4835 gfc_error ("Substring start index at %L must be scalar",
4836 &ref
->u
.ss
.start
->where
);
4840 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4841 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4842 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4844 gfc_error ("Substring start index at %L is less than one",
4845 &ref
->u
.ss
.start
->where
);
4850 if (ref
->u
.ss
.end
!= NULL
)
4852 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4855 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4857 gfc_error ("Substring end index at %L must be of type INTEGER",
4858 &ref
->u
.ss
.end
->where
);
4862 if (ref
->u
.ss
.end
->rank
!= 0)
4864 gfc_error ("Substring end index at %L must be scalar",
4865 &ref
->u
.ss
.end
->where
);
4869 if (ref
->u
.ss
.length
!= NULL
4870 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4871 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4872 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4874 gfc_error ("Substring end index at %L exceeds the string length",
4875 &ref
->u
.ss
.start
->where
);
4879 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4880 gfc_integer_kinds
[k
].huge
) == CMP_GT
4881 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4882 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4884 gfc_error ("Substring end index at %L is too large",
4885 &ref
->u
.ss
.end
->where
);
4894 /* This function supplies missing substring charlens. */
4897 gfc_resolve_substring_charlen (gfc_expr
*e
)
4900 gfc_expr
*start
, *end
;
4901 gfc_typespec
*ts
= NULL
;
4903 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4905 if (char_ref
->type
== REF_SUBSTRING
)
4907 if (char_ref
->type
== REF_COMPONENT
)
4908 ts
= &char_ref
->u
.c
.component
->ts
;
4914 gcc_assert (char_ref
->next
== NULL
);
4918 if (e
->ts
.u
.cl
->length
)
4919 gfc_free_expr (e
->ts
.u
.cl
->length
);
4920 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4924 e
->ts
.type
= BT_CHARACTER
;
4925 e
->ts
.kind
= gfc_default_character_kind
;
4928 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4930 if (char_ref
->u
.ss
.start
)
4931 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4933 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4935 if (char_ref
->u
.ss
.end
)
4936 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4937 else if (e
->expr_type
== EXPR_VARIABLE
)
4940 ts
= &e
->symtree
->n
.sym
->ts
;
4941 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4948 gfc_free_expr (start
);
4949 gfc_free_expr (end
);
4953 /* Length = (end - start + 1). */
4954 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4955 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4956 gfc_get_int_expr (gfc_charlen_int_kind
,
4959 /* F2008, 6.4.1: Both the starting point and the ending point shall
4960 be within the range 1, 2, ..., n unless the starting point exceeds
4961 the ending point, in which case the substring has length zero. */
4963 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4964 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4966 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4967 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4969 /* Make sure that the length is simplified. */
4970 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4971 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4975 /* Resolve subtype references. */
4978 resolve_ref (gfc_expr
*expr
)
4980 int current_part_dimension
, n_components
, seen_part_dimension
;
4983 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4984 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4986 find_array_spec (expr
);
4990 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4994 if (!resolve_array_ref (&ref
->u
.ar
))
5002 if (!resolve_substring (ref
))
5007 /* Check constraints on part references. */
5009 current_part_dimension
= 0;
5010 seen_part_dimension
= 0;
5013 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5018 switch (ref
->u
.ar
.type
)
5021 /* Coarray scalar. */
5022 if (ref
->u
.ar
.as
->rank
== 0)
5024 current_part_dimension
= 0;
5029 current_part_dimension
= 1;
5033 current_part_dimension
= 0;
5037 gfc_internal_error ("resolve_ref(): Bad array reference");
5043 if (current_part_dimension
|| seen_part_dimension
)
5046 if (ref
->u
.c
.component
->attr
.pointer
5047 || ref
->u
.c
.component
->attr
.proc_pointer
5048 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5049 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5051 gfc_error ("Component to the right of a part reference "
5052 "with nonzero rank must not have the POINTER "
5053 "attribute at %L", &expr
->where
);
5056 else if (ref
->u
.c
.component
->attr
.allocatable
5057 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5058 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5061 gfc_error ("Component to the right of a part reference "
5062 "with nonzero rank must not have the ALLOCATABLE "
5063 "attribute at %L", &expr
->where
);
5075 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5076 || ref
->next
== NULL
)
5077 && current_part_dimension
5078 && seen_part_dimension
)
5080 gfc_error ("Two or more part references with nonzero rank must "
5081 "not be specified at %L", &expr
->where
);
5085 if (ref
->type
== REF_COMPONENT
)
5087 if (current_part_dimension
)
5088 seen_part_dimension
= 1;
5090 /* reset to make sure */
5091 current_part_dimension
= 0;
5099 /* Given an expression, determine its shape. This is easier than it sounds.
5100 Leaves the shape array NULL if it is not possible to determine the shape. */
5103 expression_shape (gfc_expr
*e
)
5105 mpz_t array
[GFC_MAX_DIMENSIONS
];
5108 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5111 for (i
= 0; i
< e
->rank
; i
++)
5112 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5115 e
->shape
= gfc_get_shape (e
->rank
);
5117 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5122 for (i
--; i
>= 0; i
--)
5123 mpz_clear (array
[i
]);
5127 /* Given a variable expression node, compute the rank of the expression by
5128 examining the base symbol and any reference structures it may have. */
5131 expression_rank (gfc_expr
*e
)
5136 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5137 could lead to serious confusion... */
5138 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5142 if (e
->expr_type
== EXPR_ARRAY
)
5144 /* Constructors can have a rank different from one via RESHAPE(). */
5146 if (e
->symtree
== NULL
)
5152 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5153 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5159 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5161 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5162 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5163 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5165 if (ref
->type
!= REF_ARRAY
)
5168 if (ref
->u
.ar
.type
== AR_FULL
)
5170 rank
= ref
->u
.ar
.as
->rank
;
5174 if (ref
->u
.ar
.type
== AR_SECTION
)
5176 /* Figure out the rank of the section. */
5178 gfc_internal_error ("expression_rank(): Two array specs");
5180 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5181 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5182 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5192 expression_shape (e
);
5197 add_caf_get_intrinsic (gfc_expr
*e
)
5199 gfc_expr
*wrapper
, *tmp_expr
;
5203 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5204 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5209 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5210 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5213 tmp_expr
= XCNEW (gfc_expr
);
5215 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5216 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5217 wrapper
->ts
= e
->ts
;
5218 wrapper
->rank
= e
->rank
;
5220 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5227 remove_caf_get_intrinsic (gfc_expr
*e
)
5229 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5230 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5231 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5232 e
->value
.function
.actual
->expr
= NULL
;
5233 gfc_free_actual_arglist (e
->value
.function
.actual
);
5234 gfc_free_shape (&e
->shape
, e
->rank
);
5240 /* Resolve a variable expression. */
5243 resolve_variable (gfc_expr
*e
)
5250 if (e
->symtree
== NULL
)
5252 sym
= e
->symtree
->n
.sym
;
5254 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5255 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5256 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5258 if (!actual_arg
|| inquiry_argument
)
5260 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5261 "be used as actual argument", sym
->name
, &e
->where
);
5265 /* TS 29113, 407b. */
5266 else if (e
->ts
.type
== BT_ASSUMED
)
5270 gfc_error ("Assumed-type variable %s at %L may only be used "
5271 "as actual argument", sym
->name
, &e
->where
);
5274 else if (inquiry_argument
&& !first_actual_arg
)
5276 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5277 for all inquiry functions in resolve_function; the reason is
5278 that the function-name resolution happens too late in that
5280 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5281 "an inquiry function shall be the first argument",
5282 sym
->name
, &e
->where
);
5286 /* TS 29113, C535b. */
5287 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5288 && CLASS_DATA (sym
)->as
5289 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5290 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5291 && sym
->as
->type
== AS_ASSUMED_RANK
))
5295 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5296 "actual argument", sym
->name
, &e
->where
);
5299 else if (inquiry_argument
&& !first_actual_arg
)
5301 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5302 for all inquiry functions in resolve_function; the reason is
5303 that the function-name resolution happens too late in that
5305 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5306 "to an inquiry function shall be the first argument",
5307 sym
->name
, &e
->where
);
5312 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5313 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5314 && e
->ref
->next
== NULL
))
5316 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5317 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5320 /* TS 29113, 407b. */
5321 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5322 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5323 && e
->ref
->next
== NULL
))
5325 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5326 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5330 /* TS 29113, C535b. */
5331 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5332 && CLASS_DATA (sym
)->as
5333 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5334 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5335 && sym
->as
->type
== AS_ASSUMED_RANK
))
5337 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5338 && e
->ref
->next
== NULL
))
5340 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5341 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5345 /* For variables that are used in an associate (target => object) where
5346 the object's basetype is array valued while the target is scalar,
5347 the ts' type of the component refs is still array valued, which
5348 can't be translated that way. */
5349 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5350 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5351 && CLASS_DATA (sym
->assoc
->target
)->as
)
5353 gfc_ref
*ref
= e
->ref
;
5359 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5360 /* Stop the loop. */
5370 /* If this is an associate-name, it may be parsed with an array reference
5371 in error even though the target is scalar. Fail directly in this case.
5372 TODO Understand why class scalar expressions must be excluded. */
5373 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5375 if (sym
->ts
.type
== BT_CLASS
)
5376 gfc_fix_class_refs (e
);
5377 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5381 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5382 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5384 /* On the other hand, the parser may not have known this is an array;
5385 in this case, we have to add a FULL reference. */
5386 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5388 e
->ref
= gfc_get_ref ();
5389 e
->ref
->type
= REF_ARRAY
;
5390 e
->ref
->u
.ar
.type
= AR_FULL
;
5391 e
->ref
->u
.ar
.dimen
= 0;
5394 /* Like above, but for class types, where the checking whether an array
5395 ref is present is more complicated. Furthermore make sure not to add
5396 the full array ref to _vptr or _len refs. */
5397 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5398 && CLASS_DATA (sym
)->attr
.dimension
5399 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5401 gfc_ref
*ref
, *newref
;
5403 newref
= gfc_get_ref ();
5404 newref
->type
= REF_ARRAY
;
5405 newref
->u
.ar
.type
= AR_FULL
;
5406 newref
->u
.ar
.dimen
= 0;
5407 /* Because this is an associate var and the first ref either is a ref to
5408 the _data component or not, no traversal of the ref chain is
5409 needed. The array ref needs to be inserted after the _data ref,
5410 or when that is not present, which may happend for polymorphic
5411 types, then at the first position. */
5415 else if (ref
->type
== REF_COMPONENT
5416 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5418 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5420 newref
->next
= ref
->next
;
5424 /* Array ref present already. */
5425 gfc_free_ref_list (newref
);
5427 else if (ref
->type
== REF_ARRAY
)
5428 /* Array ref present already. */
5429 gfc_free_ref_list (newref
);
5437 if (e
->ref
&& !resolve_ref (e
))
5440 if (sym
->attr
.flavor
== FL_PROCEDURE
5441 && (!sym
->attr
.function
5442 || (sym
->attr
.function
&& sym
->result
5443 && sym
->result
->attr
.proc_pointer
5444 && !sym
->result
->attr
.function
)))
5446 e
->ts
.type
= BT_PROCEDURE
;
5447 goto resolve_procedure
;
5450 if (sym
->ts
.type
!= BT_UNKNOWN
)
5451 gfc_variable_attr (e
, &e
->ts
);
5452 else if (sym
->attr
.flavor
== FL_PROCEDURE
5453 && sym
->attr
.function
&& sym
->result
5454 && sym
->result
->ts
.type
!= BT_UNKNOWN
5455 && sym
->result
->attr
.proc_pointer
)
5456 e
->ts
= sym
->result
->ts
;
5459 /* Must be a simple variable reference. */
5460 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5465 if (check_assumed_size_reference (sym
, e
))
5468 /* Deal with forward references to entries during gfc_resolve_code, to
5469 satisfy, at least partially, 12.5.2.5. */
5470 if (gfc_current_ns
->entries
5471 && current_entry_id
== sym
->entry_id
5474 && cs_base
->current
->op
!= EXEC_ENTRY
)
5476 gfc_entry_list
*entry
;
5477 gfc_formal_arglist
*formal
;
5479 bool seen
, saved_specification_expr
;
5481 /* If the symbol is a dummy... */
5482 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5484 entry
= gfc_current_ns
->entries
;
5487 /* ...test if the symbol is a parameter of previous entries. */
5488 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5489 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5491 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5498 /* If it has not been seen as a dummy, this is an error. */
5501 if (specification_expr
)
5502 gfc_error ("Variable %qs, used in a specification expression"
5503 ", is referenced at %L before the ENTRY statement "
5504 "in which it is a parameter",
5505 sym
->name
, &cs_base
->current
->loc
);
5507 gfc_error ("Variable %qs is used at %L before the ENTRY "
5508 "statement in which it is a parameter",
5509 sym
->name
, &cs_base
->current
->loc
);
5514 /* Now do the same check on the specification expressions. */
5515 saved_specification_expr
= specification_expr
;
5516 specification_expr
= true;
5517 if (sym
->ts
.type
== BT_CHARACTER
5518 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5522 for (n
= 0; n
< sym
->as
->rank
; n
++)
5524 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5526 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5529 specification_expr
= saved_specification_expr
;
5532 /* Update the symbol's entry level. */
5533 sym
->entry_id
= current_entry_id
+ 1;
5536 /* If a symbol has been host_associated mark it. This is used latter,
5537 to identify if aliasing is possible via host association. */
5538 if (sym
->attr
.flavor
== FL_VARIABLE
5539 && gfc_current_ns
->parent
5540 && (gfc_current_ns
->parent
== sym
->ns
5541 || (gfc_current_ns
->parent
->parent
5542 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5543 sym
->attr
.host_assoc
= 1;
5545 if (gfc_current_ns
->proc_name
5546 && sym
->attr
.dimension
5547 && (sym
->ns
!= gfc_current_ns
5548 || sym
->attr
.use_assoc
5549 || sym
->attr
.in_common
))
5550 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5553 if (t
&& !resolve_procedure_expression (e
))
5556 /* F2008, C617 and C1229. */
5557 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5558 && gfc_is_coindexed (e
))
5560 gfc_ref
*ref
, *ref2
= NULL
;
5562 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5564 if (ref
->type
== REF_COMPONENT
)
5566 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5570 for ( ; ref
; ref
= ref
->next
)
5571 if (ref
->type
== REF_COMPONENT
)
5574 /* Expression itself is not coindexed object. */
5575 if (ref
&& e
->ts
.type
== BT_CLASS
)
5577 gfc_error ("Polymorphic subobject of coindexed object at %L",
5582 /* Expression itself is coindexed object. */
5586 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5587 for ( ; c
; c
= c
->next
)
5588 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5590 gfc_error ("Coindexed object with polymorphic allocatable "
5591 "subcomponent at %L", &e
->where
);
5599 expression_rank (e
);
5601 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5602 add_caf_get_intrinsic (e
);
5604 /* Simplify cases where access to a parameter array results in a
5605 single constant. Suppress errors since those will have been
5606 issued before, as warnings. */
5607 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5609 gfc_push_suppress_errors ();
5610 gfc_simplify_expr (e
, 1);
5611 gfc_pop_suppress_errors ();
5618 /* Checks to see that the correct symbol has been host associated.
5619 The only situation where this arises is that in which a twice
5620 contained function is parsed after the host association is made.
5621 Therefore, on detecting this, change the symbol in the expression
5622 and convert the array reference into an actual arglist if the old
5623 symbol is a variable. */
5625 check_host_association (gfc_expr
*e
)
5627 gfc_symbol
*sym
, *old_sym
;
5631 gfc_actual_arglist
*arg
, *tail
= NULL
;
5632 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5634 /* If the expression is the result of substitution in
5635 interface.c(gfc_extend_expr) because there is no way in
5636 which the host association can be wrong. */
5637 if (e
->symtree
== NULL
5638 || e
->symtree
->n
.sym
== NULL
5639 || e
->user_operator
)
5642 old_sym
= e
->symtree
->n
.sym
;
5644 if (gfc_current_ns
->parent
5645 && old_sym
->ns
!= gfc_current_ns
)
5647 /* Use the 'USE' name so that renamed module symbols are
5648 correctly handled. */
5649 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5651 if (sym
&& old_sym
!= sym
5652 && sym
->ts
.type
== old_sym
->ts
.type
5653 && sym
->attr
.flavor
== FL_PROCEDURE
5654 && sym
->attr
.contained
)
5656 /* Clear the shape, since it might not be valid. */
5657 gfc_free_shape (&e
->shape
, e
->rank
);
5659 /* Give the expression the right symtree! */
5660 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5661 gcc_assert (st
!= NULL
);
5663 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5664 || e
->expr_type
== EXPR_FUNCTION
)
5666 /* Original was function so point to the new symbol, since
5667 the actual argument list is already attached to the
5669 e
->value
.function
.esym
= NULL
;
5674 /* Original was variable so convert array references into
5675 an actual arglist. This does not need any checking now
5676 since resolve_function will take care of it. */
5677 e
->value
.function
.actual
= NULL
;
5678 e
->expr_type
= EXPR_FUNCTION
;
5681 /* Ambiguity will not arise if the array reference is not
5682 the last reference. */
5683 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5684 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5687 gcc_assert (ref
->type
== REF_ARRAY
);
5689 /* Grab the start expressions from the array ref and
5690 copy them into actual arguments. */
5691 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5693 arg
= gfc_get_actual_arglist ();
5694 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5695 if (e
->value
.function
.actual
== NULL
)
5696 tail
= e
->value
.function
.actual
= arg
;
5704 /* Dump the reference list and set the rank. */
5705 gfc_free_ref_list (e
->ref
);
5707 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5710 gfc_resolve_expr (e
);
5714 /* This might have changed! */
5715 return e
->expr_type
== EXPR_FUNCTION
;
5720 gfc_resolve_character_operator (gfc_expr
*e
)
5722 gfc_expr
*op1
= e
->value
.op
.op1
;
5723 gfc_expr
*op2
= e
->value
.op
.op2
;
5724 gfc_expr
*e1
= NULL
;
5725 gfc_expr
*e2
= NULL
;
5727 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5729 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5730 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5731 else if (op1
->expr_type
== EXPR_CONSTANT
)
5732 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5733 op1
->value
.character
.length
);
5735 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5736 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5737 else if (op2
->expr_type
== EXPR_CONSTANT
)
5738 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5739 op2
->value
.character
.length
);
5741 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5751 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5752 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5753 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5754 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5755 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5761 /* Ensure that an character expression has a charlen and, if possible, a
5762 length expression. */
5765 fixup_charlen (gfc_expr
*e
)
5767 /* The cases fall through so that changes in expression type and the need
5768 for multiple fixes are picked up. In all circumstances, a charlen should
5769 be available for the middle end to hang a backend_decl on. */
5770 switch (e
->expr_type
)
5773 gfc_resolve_character_operator (e
);
5777 if (e
->expr_type
== EXPR_ARRAY
)
5778 gfc_resolve_character_array_constructor (e
);
5781 case EXPR_SUBSTRING
:
5782 if (!e
->ts
.u
.cl
&& e
->ref
)
5783 gfc_resolve_substring_charlen (e
);
5788 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5795 /* Update an actual argument to include the passed-object for type-bound
5796 procedures at the right position. */
5798 static gfc_actual_arglist
*
5799 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5802 gcc_assert (argpos
> 0);
5806 gfc_actual_arglist
* result
;
5808 result
= gfc_get_actual_arglist ();
5812 result
->name
= name
;
5818 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5820 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5825 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5828 extract_compcall_passed_object (gfc_expr
* e
)
5832 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5834 if (e
->value
.compcall
.base_object
)
5835 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5838 po
= gfc_get_expr ();
5839 po
->expr_type
= EXPR_VARIABLE
;
5840 po
->symtree
= e
->symtree
;
5841 po
->ref
= gfc_copy_ref (e
->ref
);
5842 po
->where
= e
->where
;
5845 if (!gfc_resolve_expr (po
))
5852 /* Update the arglist of an EXPR_COMPCALL expression to include the
5856 update_compcall_arglist (gfc_expr
* e
)
5859 gfc_typebound_proc
* tbp
;
5861 tbp
= e
->value
.compcall
.tbp
;
5866 po
= extract_compcall_passed_object (e
);
5870 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5876 if (tbp
->pass_arg_num
<= 0)
5879 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5887 /* Extract the passed object from a PPC call (a copy of it). */
5890 extract_ppc_passed_object (gfc_expr
*e
)
5895 po
= gfc_get_expr ();
5896 po
->expr_type
= EXPR_VARIABLE
;
5897 po
->symtree
= e
->symtree
;
5898 po
->ref
= gfc_copy_ref (e
->ref
);
5899 po
->where
= e
->where
;
5901 /* Remove PPC reference. */
5903 while ((*ref
)->next
)
5904 ref
= &(*ref
)->next
;
5905 gfc_free_ref_list (*ref
);
5908 if (!gfc_resolve_expr (po
))
5915 /* Update the actual arglist of a procedure pointer component to include the
5919 update_ppc_arglist (gfc_expr
* e
)
5923 gfc_typebound_proc
* tb
;
5925 ppc
= gfc_get_proc_ptr_comp (e
);
5933 else if (tb
->nopass
)
5936 po
= extract_ppc_passed_object (e
);
5943 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5948 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5950 gfc_error ("Base object for procedure-pointer component call at %L is of"
5951 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5955 gcc_assert (tb
->pass_arg_num
> 0);
5956 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5964 /* Check that the object a TBP is called on is valid, i.e. it must not be
5965 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5968 check_typebound_baseobject (gfc_expr
* e
)
5971 bool return_value
= false;
5973 base
= extract_compcall_passed_object (e
);
5977 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5979 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5983 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5985 gfc_error ("Base object for type-bound procedure call at %L is of"
5986 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5990 /* F08:C1230. If the procedure called is NOPASS,
5991 the base object must be scalar. */
5992 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5994 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5995 " be scalar", &e
->where
);
5999 return_value
= true;
6002 gfc_free_expr (base
);
6003 return return_value
;
6007 /* Resolve a call to a type-bound procedure, either function or subroutine,
6008 statically from the data in an EXPR_COMPCALL expression. The adapted
6009 arglist and the target-procedure symtree are returned. */
6012 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6013 gfc_actual_arglist
** actual
)
6015 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6016 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6018 /* Update the actual arglist for PASS. */
6019 if (!update_compcall_arglist (e
))
6022 *actual
= e
->value
.compcall
.actual
;
6023 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6025 gfc_free_ref_list (e
->ref
);
6027 e
->value
.compcall
.actual
= NULL
;
6029 /* If we find a deferred typebound procedure, check for derived types
6030 that an overriding typebound procedure has not been missed. */
6031 if (e
->value
.compcall
.name
6032 && !e
->value
.compcall
.tbp
->non_overridable
6033 && e
->value
.compcall
.base_object
6034 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6037 gfc_symbol
*derived
;
6039 /* Use the derived type of the base_object. */
6040 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6043 /* If necessary, go through the inheritance chain. */
6044 while (!st
&& derived
)
6046 /* Look for the typebound procedure 'name'. */
6047 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6048 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6049 e
->value
.compcall
.name
);
6051 derived
= gfc_get_derived_super_type (derived
);
6054 /* Now find the specific name in the derived type namespace. */
6055 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6056 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6057 derived
->ns
, 1, &st
);
6065 /* Get the ultimate declared type from an expression. In addition,
6066 return the last class/derived type reference and the copy of the
6067 reference list. If check_types is set true, derived types are
6068 identified as well as class references. */
6070 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6071 gfc_expr
*e
, bool check_types
)
6073 gfc_symbol
*declared
;
6080 *new_ref
= gfc_copy_ref (e
->ref
);
6082 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6084 if (ref
->type
!= REF_COMPONENT
)
6087 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6088 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6089 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6091 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6097 if (declared
== NULL
)
6098 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6104 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6105 which of the specific bindings (if any) matches the arglist and transform
6106 the expression into a call of that binding. */
6109 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6111 gfc_typebound_proc
* genproc
;
6112 const char* genname
;
6114 gfc_symbol
*derived
;
6116 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6117 genname
= e
->value
.compcall
.name
;
6118 genproc
= e
->value
.compcall
.tbp
;
6120 if (!genproc
->is_generic
)
6123 /* Try the bindings on this type and in the inheritance hierarchy. */
6124 for (; genproc
; genproc
= genproc
->overridden
)
6128 gcc_assert (genproc
->is_generic
);
6129 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6132 gfc_actual_arglist
* args
;
6135 gcc_assert (g
->specific
);
6137 if (g
->specific
->error
)
6140 target
= g
->specific
->u
.specific
->n
.sym
;
6142 /* Get the right arglist by handling PASS/NOPASS. */
6143 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6144 if (!g
->specific
->nopass
)
6147 po
= extract_compcall_passed_object (e
);
6150 gfc_free_actual_arglist (args
);
6154 gcc_assert (g
->specific
->pass_arg_num
> 0);
6155 gcc_assert (!g
->specific
->error
);
6156 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6157 g
->specific
->pass_arg
);
6159 resolve_actual_arglist (args
, target
->attr
.proc
,
6160 is_external_proc (target
)
6161 && gfc_sym_get_dummy_args (target
) == NULL
);
6163 /* Check if this arglist matches the formal. */
6164 matches
= gfc_arglist_matches_symbol (&args
, target
);
6166 /* Clean up and break out of the loop if we've found it. */
6167 gfc_free_actual_arglist (args
);
6170 e
->value
.compcall
.tbp
= g
->specific
;
6171 genname
= g
->specific_st
->name
;
6172 /* Pass along the name for CLASS methods, where the vtab
6173 procedure pointer component has to be referenced. */
6181 /* Nothing matching found! */
6182 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6183 " %qs at %L", genname
, &e
->where
);
6187 /* Make sure that we have the right specific instance for the name. */
6188 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6190 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6192 e
->value
.compcall
.tbp
= st
->n
.tb
;
6198 /* Resolve a call to a type-bound subroutine. */
6201 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6203 gfc_actual_arglist
* newactual
;
6204 gfc_symtree
* target
;
6206 /* Check that's really a SUBROUTINE. */
6207 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6209 gfc_error ("%qs at %L should be a SUBROUTINE",
6210 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6214 if (!check_typebound_baseobject (c
->expr1
))
6217 /* Pass along the name for CLASS methods, where the vtab
6218 procedure pointer component has to be referenced. */
6220 *name
= c
->expr1
->value
.compcall
.name
;
6222 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6225 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6227 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6229 /* Transform into an ordinary EXEC_CALL for now. */
6231 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6234 c
->ext
.actual
= newactual
;
6235 c
->symtree
= target
;
6236 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6238 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6240 gfc_free_expr (c
->expr1
);
6241 c
->expr1
= gfc_get_expr ();
6242 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6243 c
->expr1
->symtree
= target
;
6244 c
->expr1
->where
= c
->loc
;
6246 return resolve_call (c
);
6250 /* Resolve a component-call expression. */
6252 resolve_compcall (gfc_expr
* e
, const char **name
)
6254 gfc_actual_arglist
* newactual
;
6255 gfc_symtree
* target
;
6257 /* Check that's really a FUNCTION. */
6258 if (!e
->value
.compcall
.tbp
->function
)
6260 gfc_error ("%qs at %L should be a FUNCTION",
6261 e
->value
.compcall
.name
, &e
->where
);
6265 /* These must not be assign-calls! */
6266 gcc_assert (!e
->value
.compcall
.assign
);
6268 if (!check_typebound_baseobject (e
))
6271 /* Pass along the name for CLASS methods, where the vtab
6272 procedure pointer component has to be referenced. */
6274 *name
= e
->value
.compcall
.name
;
6276 if (!resolve_typebound_generic_call (e
, name
))
6278 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6280 /* Take the rank from the function's symbol. */
6281 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6282 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6284 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6285 arglist to the TBP's binding target. */
6287 if (!resolve_typebound_static (e
, &target
, &newactual
))
6290 e
->value
.function
.actual
= newactual
;
6291 e
->value
.function
.name
= NULL
;
6292 e
->value
.function
.esym
= target
->n
.sym
;
6293 e
->value
.function
.isym
= NULL
;
6294 e
->symtree
= target
;
6295 e
->ts
= target
->n
.sym
->ts
;
6296 e
->expr_type
= EXPR_FUNCTION
;
6298 /* Resolution is not necessary if this is a class subroutine; this
6299 function only has to identify the specific proc. Resolution of
6300 the call will be done next in resolve_typebound_call. */
6301 return gfc_resolve_expr (e
);
6305 static bool resolve_fl_derived (gfc_symbol
*sym
);
6308 /* Resolve a typebound function, or 'method'. First separate all
6309 the non-CLASS references by calling resolve_compcall directly. */
6312 resolve_typebound_function (gfc_expr
* e
)
6314 gfc_symbol
*declared
;
6326 /* Deal with typebound operators for CLASS objects. */
6327 expr
= e
->value
.compcall
.base_object
;
6328 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6329 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6331 /* If the base_object is not a variable, the corresponding actual
6332 argument expression must be stored in e->base_expression so
6333 that the corresponding tree temporary can be used as the base
6334 object in gfc_conv_procedure_call. */
6335 if (expr
->expr_type
!= EXPR_VARIABLE
)
6337 gfc_actual_arglist
*args
;
6339 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6341 if (expr
== args
->expr
)
6346 /* Since the typebound operators are generic, we have to ensure
6347 that any delays in resolution are corrected and that the vtab
6350 declared
= ts
.u
.derived
;
6351 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6352 if (c
->ts
.u
.derived
== NULL
)
6353 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6355 if (!resolve_compcall (e
, &name
))
6358 /* Use the generic name if it is there. */
6359 name
= name
? name
: e
->value
.function
.esym
->name
;
6360 e
->symtree
= expr
->symtree
;
6361 e
->ref
= gfc_copy_ref (expr
->ref
);
6362 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6364 /* Trim away the extraneous references that emerge from nested
6365 use of interface.c (extend_expr). */
6366 if (class_ref
&& class_ref
->next
)
6368 gfc_free_ref_list (class_ref
->next
);
6369 class_ref
->next
= NULL
;
6371 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6373 gfc_free_ref_list (e
->ref
);
6377 gfc_add_vptr_component (e
);
6378 gfc_add_component_ref (e
, name
);
6379 e
->value
.function
.esym
= NULL
;
6380 if (expr
->expr_type
!= EXPR_VARIABLE
)
6381 e
->base_expr
= expr
;
6386 return resolve_compcall (e
, NULL
);
6388 if (!resolve_ref (e
))
6391 /* Get the CLASS declared type. */
6392 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6394 if (!resolve_fl_derived (declared
))
6397 /* Weed out cases of the ultimate component being a derived type. */
6398 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6399 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6401 gfc_free_ref_list (new_ref
);
6402 return resolve_compcall (e
, NULL
);
6405 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6406 declared
= c
->ts
.u
.derived
;
6408 /* Treat the call as if it is a typebound procedure, in order to roll
6409 out the correct name for the specific function. */
6410 if (!resolve_compcall (e
, &name
))
6412 gfc_free_ref_list (new_ref
);
6419 /* Convert the expression to a procedure pointer component call. */
6420 e
->value
.function
.esym
= NULL
;
6426 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6427 gfc_add_vptr_component (e
);
6428 gfc_add_component_ref (e
, name
);
6430 /* Recover the typespec for the expression. This is really only
6431 necessary for generic procedures, where the additional call
6432 to gfc_add_component_ref seems to throw the collection of the
6433 correct typespec. */
6437 gfc_free_ref_list (new_ref
);
6442 /* Resolve a typebound subroutine, or 'method'. First separate all
6443 the non-CLASS references by calling resolve_typebound_call
6447 resolve_typebound_subroutine (gfc_code
*code
)
6449 gfc_symbol
*declared
;
6459 st
= code
->expr1
->symtree
;
6461 /* Deal with typebound operators for CLASS objects. */
6462 expr
= code
->expr1
->value
.compcall
.base_object
;
6463 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6464 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6466 /* If the base_object is not a variable, the corresponding actual
6467 argument expression must be stored in e->base_expression so
6468 that the corresponding tree temporary can be used as the base
6469 object in gfc_conv_procedure_call. */
6470 if (expr
->expr_type
!= EXPR_VARIABLE
)
6472 gfc_actual_arglist
*args
;
6474 args
= code
->expr1
->value
.function
.actual
;
6475 for (; args
; args
= args
->next
)
6476 if (expr
== args
->expr
)
6480 /* Since the typebound operators are generic, we have to ensure
6481 that any delays in resolution are corrected and that the vtab
6483 declared
= expr
->ts
.u
.derived
;
6484 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6485 if (c
->ts
.u
.derived
== NULL
)
6486 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6488 if (!resolve_typebound_call (code
, &name
, NULL
))
6491 /* Use the generic name if it is there. */
6492 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6493 code
->expr1
->symtree
= expr
->symtree
;
6494 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6496 /* Trim away the extraneous references that emerge from nested
6497 use of interface.c (extend_expr). */
6498 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6499 if (class_ref
&& class_ref
->next
)
6501 gfc_free_ref_list (class_ref
->next
);
6502 class_ref
->next
= NULL
;
6504 else if (code
->expr1
->ref
&& !class_ref
)
6506 gfc_free_ref_list (code
->expr1
->ref
);
6507 code
->expr1
->ref
= NULL
;
6510 /* Now use the procedure in the vtable. */
6511 gfc_add_vptr_component (code
->expr1
);
6512 gfc_add_component_ref (code
->expr1
, name
);
6513 code
->expr1
->value
.function
.esym
= NULL
;
6514 if (expr
->expr_type
!= EXPR_VARIABLE
)
6515 code
->expr1
->base_expr
= expr
;
6520 return resolve_typebound_call (code
, NULL
, NULL
);
6522 if (!resolve_ref (code
->expr1
))
6525 /* Get the CLASS declared type. */
6526 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6528 /* Weed out cases of the ultimate component being a derived type. */
6529 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6530 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6532 gfc_free_ref_list (new_ref
);
6533 return resolve_typebound_call (code
, NULL
, NULL
);
6536 if (!resolve_typebound_call (code
, &name
, &overridable
))
6538 gfc_free_ref_list (new_ref
);
6541 ts
= code
->expr1
->ts
;
6545 /* Convert the expression to a procedure pointer component call. */
6546 code
->expr1
->value
.function
.esym
= NULL
;
6547 code
->expr1
->symtree
= st
;
6550 code
->expr1
->ref
= new_ref
;
6552 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6553 gfc_add_vptr_component (code
->expr1
);
6554 gfc_add_component_ref (code
->expr1
, name
);
6556 /* Recover the typespec for the expression. This is really only
6557 necessary for generic procedures, where the additional call
6558 to gfc_add_component_ref seems to throw the collection of the
6559 correct typespec. */
6560 code
->expr1
->ts
= ts
;
6563 gfc_free_ref_list (new_ref
);
6569 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6572 resolve_ppc_call (gfc_code
* c
)
6574 gfc_component
*comp
;
6576 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6577 gcc_assert (comp
!= NULL
);
6579 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6580 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6582 if (!comp
->attr
.subroutine
)
6583 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6585 if (!resolve_ref (c
->expr1
))
6588 if (!update_ppc_arglist (c
->expr1
))
6591 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6593 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6594 !(comp
->ts
.interface
6595 && comp
->ts
.interface
->formal
)))
6598 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6601 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6607 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6610 resolve_expr_ppc (gfc_expr
* e
)
6612 gfc_component
*comp
;
6614 comp
= gfc_get_proc_ptr_comp (e
);
6615 gcc_assert (comp
!= NULL
);
6617 /* Convert to EXPR_FUNCTION. */
6618 e
->expr_type
= EXPR_FUNCTION
;
6619 e
->value
.function
.isym
= NULL
;
6620 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6622 if (comp
->as
!= NULL
)
6623 e
->rank
= comp
->as
->rank
;
6625 if (!comp
->attr
.function
)
6626 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6628 if (!resolve_ref (e
))
6631 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6632 !(comp
->ts
.interface
6633 && comp
->ts
.interface
->formal
)))
6636 if (!update_ppc_arglist (e
))
6639 if (!check_pure_function(e
))
6642 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6649 gfc_is_expandable_expr (gfc_expr
*e
)
6651 gfc_constructor
*con
;
6653 if (e
->expr_type
== EXPR_ARRAY
)
6655 /* Traverse the constructor looking for variables that are flavor
6656 parameter. Parameters must be expanded since they are fully used at
6658 con
= gfc_constructor_first (e
->value
.constructor
);
6659 for (; con
; con
= gfc_constructor_next (con
))
6661 if (con
->expr
->expr_type
== EXPR_VARIABLE
6662 && con
->expr
->symtree
6663 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6664 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6666 if (con
->expr
->expr_type
== EXPR_ARRAY
6667 && gfc_is_expandable_expr (con
->expr
))
6676 /* Sometimes variables in specification expressions of the result
6677 of module procedures in submodules wind up not being the 'real'
6678 dummy. Find this, if possible, in the namespace of the first
6682 fixup_unique_dummy (gfc_expr
*e
)
6684 gfc_symtree
*st
= NULL
;
6685 gfc_symbol
*s
= NULL
;
6687 if (e
->symtree
->n
.sym
->ns
->proc_name
6688 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6689 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6692 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6695 && st
->n
.sym
!= NULL
6696 && st
->n
.sym
->attr
.dummy
)
6700 /* Resolve an expression. That is, make sure that types of operands agree
6701 with their operators, intrinsic operators are converted to function calls
6702 for overloaded types and unresolved function references are resolved. */
6705 gfc_resolve_expr (gfc_expr
*e
)
6708 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6713 /* inquiry_argument only applies to variables. */
6714 inquiry_save
= inquiry_argument
;
6715 actual_arg_save
= actual_arg
;
6716 first_actual_arg_save
= first_actual_arg
;
6718 if (e
->expr_type
!= EXPR_VARIABLE
)
6720 inquiry_argument
= false;
6722 first_actual_arg
= false;
6724 else if (e
->symtree
!= NULL
6725 && *e
->symtree
->name
== '@'
6726 && e
->symtree
->n
.sym
->attr
.dummy
)
6728 /* Deal with submodule specification expressions that are not
6729 found to be referenced in module.c(read_cleanup). */
6730 fixup_unique_dummy (e
);
6733 switch (e
->expr_type
)
6736 t
= resolve_operator (e
);
6742 if (check_host_association (e
))
6743 t
= resolve_function (e
);
6745 t
= resolve_variable (e
);
6747 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6748 && e
->ref
->type
!= REF_SUBSTRING
)
6749 gfc_resolve_substring_charlen (e
);
6754 t
= resolve_typebound_function (e
);
6757 case EXPR_SUBSTRING
:
6758 t
= resolve_ref (e
);
6767 t
= resolve_expr_ppc (e
);
6772 if (!resolve_ref (e
))
6775 t
= gfc_resolve_array_constructor (e
);
6776 /* Also try to expand a constructor. */
6779 expression_rank (e
);
6780 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6781 gfc_expand_constructor (e
, false);
6784 /* This provides the opportunity for the length of constructors with
6785 character valued function elements to propagate the string length
6786 to the expression. */
6787 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6789 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6790 here rather then add a duplicate test for it above. */
6791 gfc_expand_constructor (e
, false);
6792 t
= gfc_resolve_character_array_constructor (e
);
6797 case EXPR_STRUCTURE
:
6798 t
= resolve_ref (e
);
6802 t
= resolve_structure_cons (e
, 0);
6806 t
= gfc_simplify_expr (e
, 0);
6810 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6813 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6816 inquiry_argument
= inquiry_save
;
6817 actual_arg
= actual_arg_save
;
6818 first_actual_arg
= first_actual_arg_save
;
6824 /* Resolve an expression from an iterator. They must be scalar and have
6825 INTEGER or (optionally) REAL type. */
6828 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6829 const char *name_msgid
)
6831 if (!gfc_resolve_expr (expr
))
6834 if (expr
->rank
!= 0)
6836 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6840 if (expr
->ts
.type
!= BT_INTEGER
)
6842 if (expr
->ts
.type
== BT_REAL
)
6845 return gfc_notify_std (GFC_STD_F95_DEL
,
6846 "%s at %L must be integer",
6847 _(name_msgid
), &expr
->where
);
6850 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6857 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6865 /* Resolve the expressions in an iterator structure. If REAL_OK is
6866 false allow only INTEGER type iterators, otherwise allow REAL types.
6867 Set own_scope to true for ac-implied-do and data-implied-do as those
6868 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6871 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6873 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6876 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6877 _("iterator variable")))
6880 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6881 "Start expression in DO loop"))
6884 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6885 "End expression in DO loop"))
6888 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6889 "Step expression in DO loop"))
6892 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6894 if ((iter
->step
->ts
.type
== BT_INTEGER
6895 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6896 || (iter
->step
->ts
.type
== BT_REAL
6897 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6899 gfc_error ("Step expression in DO loop at %L cannot be zero",
6900 &iter
->step
->where
);
6905 /* Convert start, end, and step to the same type as var. */
6906 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6907 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6908 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6910 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6911 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6912 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6914 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6915 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6916 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6918 if (iter
->start
->expr_type
== EXPR_CONSTANT
6919 && iter
->end
->expr_type
== EXPR_CONSTANT
6920 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6923 if (iter
->start
->ts
.type
== BT_INTEGER
)
6925 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6926 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6930 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6931 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6933 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6934 gfc_warning (OPT_Wzerotrip
,
6935 "DO loop at %L will be executed zero times",
6936 &iter
->step
->where
);
6939 if (iter
->end
->expr_type
== EXPR_CONSTANT
6940 && iter
->end
->ts
.type
== BT_INTEGER
6941 && iter
->step
->expr_type
== EXPR_CONSTANT
6942 && iter
->step
->ts
.type
== BT_INTEGER
6943 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6944 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6946 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6947 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6949 if (is_step_positive
6950 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6951 gfc_warning (OPT_Wundefined_do_loop
,
6952 "DO loop at %L is undefined as it overflows",
6953 &iter
->step
->where
);
6954 else if (!is_step_positive
6955 && mpz_cmp (iter
->end
->value
.integer
,
6956 gfc_integer_kinds
[k
].min_int
) == 0)
6957 gfc_warning (OPT_Wundefined_do_loop
,
6958 "DO loop at %L is undefined as it underflows",
6959 &iter
->step
->where
);
6966 /* Traversal function for find_forall_index. f == 2 signals that
6967 that variable itself is not to be checked - only the references. */
6970 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6972 if (expr
->expr_type
!= EXPR_VARIABLE
)
6975 /* A scalar assignment */
6976 if (!expr
->ref
|| *f
== 1)
6978 if (expr
->symtree
->n
.sym
== sym
)
6990 /* Check whether the FORALL index appears in the expression or not.
6991 Returns true if SYM is found in EXPR. */
6994 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6996 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7003 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7004 to be a scalar INTEGER variable. The subscripts and stride are scalar
7005 INTEGERs, and if stride is a constant it must be nonzero.
7006 Furthermore "A subscript or stride in a forall-triplet-spec shall
7007 not contain a reference to any index-name in the
7008 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7011 resolve_forall_iterators (gfc_forall_iterator
*it
)
7013 gfc_forall_iterator
*iter
, *iter2
;
7015 for (iter
= it
; iter
; iter
= iter
->next
)
7017 if (gfc_resolve_expr (iter
->var
)
7018 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7019 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7022 if (gfc_resolve_expr (iter
->start
)
7023 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7024 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7025 &iter
->start
->where
);
7026 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7027 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7029 if (gfc_resolve_expr (iter
->end
)
7030 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7031 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7033 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7034 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7036 if (gfc_resolve_expr (iter
->stride
))
7038 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7039 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7040 &iter
->stride
->where
, "INTEGER");
7042 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7043 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7044 gfc_error ("FORALL stride expression at %L cannot be zero",
7045 &iter
->stride
->where
);
7047 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7048 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7051 for (iter
= it
; iter
; iter
= iter
->next
)
7052 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7054 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7055 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7056 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7057 gfc_error ("FORALL index %qs may not appear in triplet "
7058 "specification at %L", iter
->var
->symtree
->name
,
7059 &iter2
->start
->where
);
7064 /* Given a pointer to a symbol that is a derived type, see if it's
7065 inaccessible, i.e. if it's defined in another module and the components are
7066 PRIVATE. The search is recursive if necessary. Returns zero if no
7067 inaccessible components are found, nonzero otherwise. */
7070 derived_inaccessible (gfc_symbol
*sym
)
7074 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7077 for (c
= sym
->components
; c
; c
= c
->next
)
7079 /* Prevent an infinite loop through this function. */
7080 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7081 && sym
== c
->ts
.u
.derived
)
7084 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7092 /* Resolve the argument of a deallocate expression. The expression must be
7093 a pointer or a full array. */
7096 resolve_deallocate_expr (gfc_expr
*e
)
7098 symbol_attribute attr
;
7099 int allocatable
, pointer
;
7105 if (!gfc_resolve_expr (e
))
7108 if (e
->expr_type
!= EXPR_VARIABLE
)
7111 sym
= e
->symtree
->n
.sym
;
7112 unlimited
= UNLIMITED_POLY(sym
);
7114 if (sym
->ts
.type
== BT_CLASS
)
7116 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7117 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7121 allocatable
= sym
->attr
.allocatable
;
7122 pointer
= sym
->attr
.pointer
;
7124 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7129 if (ref
->u
.ar
.type
!= AR_FULL
7130 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7131 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7136 c
= ref
->u
.c
.component
;
7137 if (c
->ts
.type
== BT_CLASS
)
7139 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7140 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7144 allocatable
= c
->attr
.allocatable
;
7145 pointer
= c
->attr
.pointer
;
7155 attr
= gfc_expr_attr (e
);
7157 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7160 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7166 if (gfc_is_coindexed (e
))
7168 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7173 && !gfc_check_vardef_context (e
, true, true, false,
7174 _("DEALLOCATE object")))
7176 if (!gfc_check_vardef_context (e
, false, true, false,
7177 _("DEALLOCATE object")))
7184 /* Returns true if the expression e contains a reference to the symbol sym. */
7186 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7188 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7195 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7197 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7201 /* Given the expression node e for an allocatable/pointer of derived type to be
7202 allocated, get the expression node to be initialized afterwards (needed for
7203 derived types with default initializers, and derived types with allocatable
7204 components that need nullification.) */
7207 gfc_expr_to_initialize (gfc_expr
*e
)
7213 result
= gfc_copy_expr (e
);
7215 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7216 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7217 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7219 ref
->u
.ar
.type
= AR_FULL
;
7221 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7222 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7227 gfc_free_shape (&result
->shape
, result
->rank
);
7229 /* Recalculate rank, shape, etc. */
7230 gfc_resolve_expr (result
);
7235 /* If the last ref of an expression is an array ref, return a copy of the
7236 expression with that one removed. Otherwise, a copy of the original
7237 expression. This is used for allocate-expressions and pointer assignment
7238 LHS, where there may be an array specification that needs to be stripped
7239 off when using gfc_check_vardef_context. */
7242 remove_last_array_ref (gfc_expr
* e
)
7247 e2
= gfc_copy_expr (e
);
7248 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7249 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7251 gfc_free_ref_list (*r
);
7260 /* Used in resolve_allocate_expr to check that a allocation-object and
7261 a source-expr are conformable. This does not catch all possible
7262 cases; in particular a runtime checking is needed. */
7265 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7268 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7270 /* First compare rank. */
7271 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7272 || (!tail
&& e1
->rank
!= e2
->rank
))
7274 gfc_error ("Source-expr at %L must be scalar or have the "
7275 "same rank as the allocate-object at %L",
7276 &e1
->where
, &e2
->where
);
7287 for (i
= 0; i
< e1
->rank
; i
++)
7289 if (tail
->u
.ar
.start
[i
] == NULL
)
7292 if (tail
->u
.ar
.end
[i
])
7294 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7295 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7296 mpz_add_ui (s
, s
, 1);
7300 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7303 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7305 gfc_error ("Source-expr at %L and allocate-object at %L must "
7306 "have the same shape", &e1
->where
, &e2
->where
);
7319 /* Resolve the expression in an ALLOCATE statement, doing the additional
7320 checks to see whether the expression is OK or not. The expression must
7321 have a trailing array reference that gives the size of the array. */
7324 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7326 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7330 symbol_attribute attr
;
7331 gfc_ref
*ref
, *ref2
;
7334 gfc_symbol
*sym
= NULL
;
7339 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7340 checking of coarrays. */
7341 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7342 if (ref
->next
== NULL
)
7345 if (ref
&& ref
->type
== REF_ARRAY
)
7346 ref
->u
.ar
.in_allocate
= true;
7348 if (!gfc_resolve_expr (e
))
7351 /* Make sure the expression is allocatable or a pointer. If it is
7352 pointer, the next-to-last reference must be a pointer. */
7356 sym
= e
->symtree
->n
.sym
;
7358 /* Check whether ultimate component is abstract and CLASS. */
7361 /* Is the allocate-object unlimited polymorphic? */
7362 unlimited
= UNLIMITED_POLY(e
);
7364 if (e
->expr_type
!= EXPR_VARIABLE
)
7367 attr
= gfc_expr_attr (e
);
7368 pointer
= attr
.pointer
;
7369 dimension
= attr
.dimension
;
7370 codimension
= attr
.codimension
;
7374 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7376 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7377 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7378 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7379 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7380 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7384 allocatable
= sym
->attr
.allocatable
;
7385 pointer
= sym
->attr
.pointer
;
7386 dimension
= sym
->attr
.dimension
;
7387 codimension
= sym
->attr
.codimension
;
7392 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7397 if (ref
->u
.ar
.codimen
> 0)
7400 for (n
= ref
->u
.ar
.dimen
;
7401 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7402 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7409 if (ref
->next
!= NULL
)
7417 gfc_error ("Coindexed allocatable object at %L",
7422 c
= ref
->u
.c
.component
;
7423 if (c
->ts
.type
== BT_CLASS
)
7425 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7426 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7427 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7428 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7429 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7433 allocatable
= c
->attr
.allocatable
;
7434 pointer
= c
->attr
.pointer
;
7435 dimension
= c
->attr
.dimension
;
7436 codimension
= c
->attr
.codimension
;
7437 is_abstract
= c
->attr
.abstract
;
7449 /* Check for F08:C628. */
7450 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7452 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7457 /* Some checks for the SOURCE tag. */
7460 /* Check F03:C631. */
7461 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7463 gfc_error ("Type of entity at %L is type incompatible with "
7464 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7468 /* Check F03:C632 and restriction following Note 6.18. */
7469 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7472 /* Check F03:C633. */
7473 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7475 gfc_error ("The allocate-object at %L and the source-expr at %L "
7476 "shall have the same kind type parameter",
7477 &e
->where
, &code
->expr3
->where
);
7481 /* Check F2008, C642. */
7482 if (code
->expr3
->ts
.type
== BT_DERIVED
7483 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7484 || (code
->expr3
->ts
.u
.derived
->from_intmod
7485 == INTMOD_ISO_FORTRAN_ENV
7486 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7487 == ISOFORTRAN_LOCK_TYPE
)))
7489 gfc_error ("The source-expr at %L shall neither be of type "
7490 "LOCK_TYPE nor have a LOCK_TYPE component if "
7491 "allocate-object at %L is a coarray",
7492 &code
->expr3
->where
, &e
->where
);
7496 /* Check TS18508, C702/C703. */
7497 if (code
->expr3
->ts
.type
== BT_DERIVED
7498 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7499 || (code
->expr3
->ts
.u
.derived
->from_intmod
7500 == INTMOD_ISO_FORTRAN_ENV
7501 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7502 == ISOFORTRAN_EVENT_TYPE
)))
7504 gfc_error ("The source-expr at %L shall neither be of type "
7505 "EVENT_TYPE nor have a EVENT_TYPE component if "
7506 "allocate-object at %L is a coarray",
7507 &code
->expr3
->where
, &e
->where
);
7512 /* Check F08:C629. */
7513 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7516 gcc_assert (e
->ts
.type
== BT_CLASS
);
7517 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7518 "type-spec or source-expr", sym
->name
, &e
->where
);
7522 /* Check F08:C632. */
7523 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7524 && !UNLIMITED_POLY (e
))
7528 if (!e
->ts
.u
.cl
->length
)
7531 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7532 code
->ext
.alloc
.ts
.u
.cl
->length
);
7533 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7535 gfc_error ("Allocating %s at %L with type-spec requires the same "
7536 "character-length parameter as in the declaration",
7537 sym
->name
, &e
->where
);
7542 /* In the variable definition context checks, gfc_expr_attr is used
7543 on the expression. This is fooled by the array specification
7544 present in e, thus we have to eliminate that one temporarily. */
7545 e2
= remove_last_array_ref (e
);
7548 t
= gfc_check_vardef_context (e2
, true, true, false,
7549 _("ALLOCATE object"));
7551 t
= gfc_check_vardef_context (e2
, false, true, false,
7552 _("ALLOCATE object"));
7557 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7558 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7560 /* For class arrays, the initialization with SOURCE is done
7561 using _copy and trans_call. It is convenient to exploit that
7562 when the allocated type is different from the declared type but
7563 no SOURCE exists by setting expr3. */
7564 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7566 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7567 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7568 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7570 /* We have to zero initialize the integer variable. */
7571 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7574 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7576 /* Make sure the vtab symbol is present when
7577 the module variables are generated. */
7578 gfc_typespec ts
= e
->ts
;
7580 ts
= code
->expr3
->ts
;
7581 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7582 ts
= code
->ext
.alloc
.ts
;
7584 /* Finding the vtab also publishes the type's symbol. Therefore this
7585 statement is necessary. */
7586 gfc_find_derived_vtab (ts
.u
.derived
);
7588 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7590 /* Again, make sure the vtab symbol is present when
7591 the module variables are generated. */
7592 gfc_typespec
*ts
= NULL
;
7594 ts
= &code
->expr3
->ts
;
7596 ts
= &code
->ext
.alloc
.ts
;
7600 /* Finding the vtab also publishes the type's symbol. Therefore this
7601 statement is necessary. */
7605 if (dimension
== 0 && codimension
== 0)
7608 /* Make sure the last reference node is an array specification. */
7610 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7611 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7616 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7617 "in ALLOCATE statement at %L", &e
->where
))
7619 if (code
->expr3
->rank
!= 0)
7620 *array_alloc_wo_spec
= true;
7623 gfc_error ("Array specification or array-valued SOURCE= "
7624 "expression required in ALLOCATE statement at %L",
7631 gfc_error ("Array specification required in ALLOCATE statement "
7632 "at %L", &e
->where
);
7637 /* Make sure that the array section reference makes sense in the
7638 context of an ALLOCATE specification. */
7643 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7644 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7646 gfc_error ("Coarray specification required in ALLOCATE statement "
7647 "at %L", &e
->where
);
7651 for (i
= 0; i
< ar
->dimen
; i
++)
7653 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7656 switch (ar
->dimen_type
[i
])
7662 if (ar
->start
[i
] != NULL
7663 && ar
->end
[i
] != NULL
7664 && ar
->stride
[i
] == NULL
)
7672 case DIMEN_THIS_IMAGE
:
7673 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7679 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7681 sym
= a
->expr
->symtree
->n
.sym
;
7683 /* TODO - check derived type components. */
7684 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7687 if ((ar
->start
[i
] != NULL
7688 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7689 || (ar
->end
[i
] != NULL
7690 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7692 gfc_error ("%qs must not appear in the array specification at "
7693 "%L in the same ALLOCATE statement where it is "
7694 "itself allocated", sym
->name
, &ar
->where
);
7700 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7702 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7703 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7705 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7707 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7708 "statement at %L", &e
->where
);
7714 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7715 && ar
->stride
[i
] == NULL
)
7718 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7732 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7734 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7735 gfc_alloc
*a
, *p
, *q
;
7738 errmsg
= code
->expr2
;
7740 /* Check the stat variable. */
7743 gfc_check_vardef_context (stat
, false, false, false,
7744 _("STAT variable"));
7746 if ((stat
->ts
.type
!= BT_INTEGER
7747 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7748 || stat
->ref
->type
== REF_COMPONENT
)))
7750 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7751 "variable", &stat
->where
);
7753 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7754 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7756 gfc_ref
*ref1
, *ref2
;
7759 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7760 ref1
= ref1
->next
, ref2
= ref2
->next
)
7762 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7764 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7773 gfc_error ("Stat-variable at %L shall not be %sd within "
7774 "the same %s statement", &stat
->where
, fcn
, fcn
);
7780 /* Check the errmsg variable. */
7784 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7787 gfc_check_vardef_context (errmsg
, false, false, false,
7788 _("ERRMSG variable"));
7790 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7791 F18:R930 errmsg-variable is scalar-default-char-variable
7792 F18:R906 default-char-variable is variable
7793 F18:C906 default-char-variable shall be default character. */
7794 if ((errmsg
->ts
.type
!= BT_CHARACTER
7796 && (errmsg
->ref
->type
== REF_ARRAY
7797 || errmsg
->ref
->type
== REF_COMPONENT
)))
7799 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7800 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7801 "variable", &errmsg
->where
);
7803 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7804 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7806 gfc_ref
*ref1
, *ref2
;
7809 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7810 ref1
= ref1
->next
, ref2
= ref2
->next
)
7812 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7814 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7823 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7824 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7830 /* Check that an allocate-object appears only once in the statement. */
7832 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7835 for (q
= p
->next
; q
; q
= q
->next
)
7838 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7840 /* This is a potential collision. */
7841 gfc_ref
*pr
= pe
->ref
;
7842 gfc_ref
*qr
= qe
->ref
;
7844 /* Follow the references until
7845 a) They start to differ, in which case there is no error;
7846 you can deallocate a%b and a%c in a single statement
7847 b) Both of them stop, which is an error
7848 c) One of them stops, which is also an error. */
7851 if (pr
== NULL
&& qr
== NULL
)
7853 gfc_error ("Allocate-object at %L also appears at %L",
7854 &pe
->where
, &qe
->where
);
7857 else if (pr
!= NULL
&& qr
== NULL
)
7859 gfc_error ("Allocate-object at %L is subobject of"
7860 " object at %L", &pe
->where
, &qe
->where
);
7863 else if (pr
== NULL
&& qr
!= NULL
)
7865 gfc_error ("Allocate-object at %L is subobject of"
7866 " object at %L", &qe
->where
, &pe
->where
);
7869 /* Here, pr != NULL && qr != NULL */
7870 gcc_assert(pr
->type
== qr
->type
);
7871 if (pr
->type
== REF_ARRAY
)
7873 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7875 gcc_assert (qr
->type
== REF_ARRAY
);
7877 if (pr
->next
&& qr
->next
)
7880 gfc_array_ref
*par
= &(pr
->u
.ar
);
7881 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7883 for (i
=0; i
<par
->dimen
; i
++)
7885 if ((par
->start
[i
] != NULL
7886 || qar
->start
[i
] != NULL
)
7887 && gfc_dep_compare_expr (par
->start
[i
],
7888 qar
->start
[i
]) != 0)
7895 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7908 if (strcmp (fcn
, "ALLOCATE") == 0)
7910 bool arr_alloc_wo_spec
= false;
7912 /* Resolving the expr3 in the loop over all objects to allocate would
7913 execute loop invariant code for each loop item. Therefore do it just
7915 if (code
->expr3
&& code
->expr3
->mold
7916 && code
->expr3
->ts
.type
== BT_DERIVED
)
7918 /* Default initialization via MOLD (non-polymorphic). */
7919 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7922 gfc_resolve_expr (rhs
);
7923 gfc_free_expr (code
->expr3
);
7927 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7928 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7930 if (arr_alloc_wo_spec
&& code
->expr3
)
7932 /* Mark the allocate to have to take the array specification
7934 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7939 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7940 resolve_deallocate_expr (a
->expr
);
7945 /************ SELECT CASE resolution subroutines ************/
7947 /* Callback function for our mergesort variant. Determines interval
7948 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7949 op1 > op2. Assumes we're not dealing with the default case.
7950 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7951 There are nine situations to check. */
7954 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7958 if (op1
->low
== NULL
) /* op1 = (:L) */
7960 /* op2 = (:N), so overlap. */
7962 /* op2 = (M:) or (M:N), L < M */
7963 if (op2
->low
!= NULL
7964 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7967 else if (op1
->high
== NULL
) /* op1 = (K:) */
7969 /* op2 = (M:), so overlap. */
7971 /* op2 = (:N) or (M:N), K > N */
7972 if (op2
->high
!= NULL
7973 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7976 else /* op1 = (K:L) */
7978 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7979 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7981 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7982 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7984 else /* op2 = (M:N) */
7988 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7991 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8000 /* Merge-sort a double linked case list, detecting overlap in the
8001 process. LIST is the head of the double linked case list before it
8002 is sorted. Returns the head of the sorted list if we don't see any
8003 overlap, or NULL otherwise. */
8006 check_case_overlap (gfc_case
*list
)
8008 gfc_case
*p
, *q
, *e
, *tail
;
8009 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8011 /* If the passed list was empty, return immediately. */
8018 /* Loop unconditionally. The only exit from this loop is a return
8019 statement, when we've finished sorting the case list. */
8026 /* Count the number of merges we do in this pass. */
8029 /* Loop while there exists a merge to be done. */
8034 /* Count this merge. */
8037 /* Cut the list in two pieces by stepping INSIZE places
8038 forward in the list, starting from P. */
8041 for (i
= 0; i
< insize
; i
++)
8050 /* Now we have two lists. Merge them! */
8051 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8053 /* See from which the next case to merge comes from. */
8056 /* P is empty so the next case must come from Q. */
8061 else if (qsize
== 0 || q
== NULL
)
8070 cmp
= compare_cases (p
, q
);
8073 /* The whole case range for P is less than the
8081 /* The whole case range for Q is greater than
8082 the case range for P. */
8089 /* The cases overlap, or they are the same
8090 element in the list. Either way, we must
8091 issue an error and get the next case from P. */
8092 /* FIXME: Sort P and Q by line number. */
8093 gfc_error ("CASE label at %L overlaps with CASE "
8094 "label at %L", &p
->where
, &q
->where
);
8102 /* Add the next element to the merged list. */
8111 /* P has now stepped INSIZE places along, and so has Q. So
8112 they're the same. */
8117 /* If we have done only one merge or none at all, we've
8118 finished sorting the cases. */
8127 /* Otherwise repeat, merging lists twice the size. */
8133 /* Check to see if an expression is suitable for use in a CASE statement.
8134 Makes sure that all case expressions are scalar constants of the same
8135 type. Return false if anything is wrong. */
8138 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8140 if (e
== NULL
) return true;
8142 if (e
->ts
.type
!= case_expr
->ts
.type
)
8144 gfc_error ("Expression in CASE statement at %L must be of type %s",
8145 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8149 /* C805 (R808) For a given case-construct, each case-value shall be of
8150 the same type as case-expr. For character type, length differences
8151 are allowed, but the kind type parameters shall be the same. */
8153 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8155 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8156 &e
->where
, case_expr
->ts
.kind
);
8160 /* Convert the case value kind to that of case expression kind,
8163 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8164 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8168 gfc_error ("Expression in CASE statement at %L must be scalar",
8177 /* Given a completely parsed select statement, we:
8179 - Validate all expressions and code within the SELECT.
8180 - Make sure that the selection expression is not of the wrong type.
8181 - Make sure that no case ranges overlap.
8182 - Eliminate unreachable cases and unreachable code resulting from
8183 removing case labels.
8185 The standard does allow unreachable cases, e.g. CASE (5:3). But
8186 they are a hassle for code generation, and to prevent that, we just
8187 cut them out here. This is not necessary for overlapping cases
8188 because they are illegal and we never even try to generate code.
8190 We have the additional caveat that a SELECT construct could have
8191 been a computed GOTO in the source code. Fortunately we can fairly
8192 easily work around that here: The case_expr for a "real" SELECT CASE
8193 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8194 we have to do is make sure that the case_expr is a scalar integer
8198 resolve_select (gfc_code
*code
, bool select_type
)
8201 gfc_expr
*case_expr
;
8202 gfc_case
*cp
, *default_case
, *tail
, *head
;
8203 int seen_unreachable
;
8209 if (code
->expr1
== NULL
)
8211 /* This was actually a computed GOTO statement. */
8212 case_expr
= code
->expr2
;
8213 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8214 gfc_error ("Selection expression in computed GOTO statement "
8215 "at %L must be a scalar integer expression",
8218 /* Further checking is not necessary because this SELECT was built
8219 by the compiler, so it should always be OK. Just move the
8220 case_expr from expr2 to expr so that we can handle computed
8221 GOTOs as normal SELECTs from here on. */
8222 code
->expr1
= code
->expr2
;
8227 case_expr
= code
->expr1
;
8228 type
= case_expr
->ts
.type
;
8231 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8233 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8234 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8236 /* Punt. Going on here just produce more garbage error messages. */
8241 if (!select_type
&& case_expr
->rank
!= 0)
8243 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8244 "expression", &case_expr
->where
);
8250 /* Raise a warning if an INTEGER case value exceeds the range of
8251 the case-expr. Later, all expressions will be promoted to the
8252 largest kind of all case-labels. */
8254 if (type
== BT_INTEGER
)
8255 for (body
= code
->block
; body
; body
= body
->block
)
8256 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8259 && gfc_check_integer_range (cp
->low
->value
.integer
,
8260 case_expr
->ts
.kind
) != ARITH_OK
)
8261 gfc_warning (0, "Expression in CASE statement at %L is "
8262 "not in the range of %s", &cp
->low
->where
,
8263 gfc_typename (&case_expr
->ts
));
8266 && cp
->low
!= cp
->high
8267 && gfc_check_integer_range (cp
->high
->value
.integer
,
8268 case_expr
->ts
.kind
) != ARITH_OK
)
8269 gfc_warning (0, "Expression in CASE statement at %L is "
8270 "not in the range of %s", &cp
->high
->where
,
8271 gfc_typename (&case_expr
->ts
));
8274 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8275 of the SELECT CASE expression and its CASE values. Walk the lists
8276 of case values, and if we find a mismatch, promote case_expr to
8277 the appropriate kind. */
8279 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8281 for (body
= code
->block
; body
; body
= body
->block
)
8283 /* Walk the case label list. */
8284 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8286 /* Intercept the DEFAULT case. It does not have a kind. */
8287 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8290 /* Unreachable case ranges are discarded, so ignore. */
8291 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8292 && cp
->low
!= cp
->high
8293 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8297 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8298 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8300 if (cp
->high
!= NULL
8301 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8302 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8307 /* Assume there is no DEFAULT case. */
8308 default_case
= NULL
;
8313 for (body
= code
->block
; body
; body
= body
->block
)
8315 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8317 seen_unreachable
= 0;
8319 /* Walk the case label list, making sure that all case labels
8321 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8323 /* Count the number of cases in the whole construct. */
8326 /* Intercept the DEFAULT case. */
8327 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8329 if (default_case
!= NULL
)
8331 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8332 "by a second DEFAULT CASE at %L",
8333 &default_case
->where
, &cp
->where
);
8344 /* Deal with single value cases and case ranges. Errors are
8345 issued from the validation function. */
8346 if (!validate_case_label_expr (cp
->low
, case_expr
)
8347 || !validate_case_label_expr (cp
->high
, case_expr
))
8353 if (type
== BT_LOGICAL
8354 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8355 || cp
->low
!= cp
->high
))
8357 gfc_error ("Logical range in CASE statement at %L is not "
8358 "allowed", &cp
->low
->where
);
8363 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8366 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8367 if (value
& seen_logical
)
8369 gfc_error ("Constant logical value in CASE statement "
8370 "is repeated at %L",
8375 seen_logical
|= value
;
8378 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8379 && cp
->low
!= cp
->high
8380 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8382 if (warn_surprising
)
8383 gfc_warning (OPT_Wsurprising
,
8384 "Range specification at %L can never be matched",
8387 cp
->unreachable
= 1;
8388 seen_unreachable
= 1;
8392 /* If the case range can be matched, it can also overlap with
8393 other cases. To make sure it does not, we put it in a
8394 double linked list here. We sort that with a merge sort
8395 later on to detect any overlapping cases. */
8399 head
->right
= head
->left
= NULL
;
8404 tail
->right
->left
= tail
;
8411 /* It there was a failure in the previous case label, give up
8412 for this case label list. Continue with the next block. */
8416 /* See if any case labels that are unreachable have been seen.
8417 If so, we eliminate them. This is a bit of a kludge because
8418 the case lists for a single case statement (label) is a
8419 single forward linked lists. */
8420 if (seen_unreachable
)
8422 /* Advance until the first case in the list is reachable. */
8423 while (body
->ext
.block
.case_list
!= NULL
8424 && body
->ext
.block
.case_list
->unreachable
)
8426 gfc_case
*n
= body
->ext
.block
.case_list
;
8427 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8429 gfc_free_case_list (n
);
8432 /* Strip all other unreachable cases. */
8433 if (body
->ext
.block
.case_list
)
8435 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8437 if (cp
->next
->unreachable
)
8439 gfc_case
*n
= cp
->next
;
8440 cp
->next
= cp
->next
->next
;
8442 gfc_free_case_list (n
);
8449 /* See if there were overlapping cases. If the check returns NULL,
8450 there was overlap. In that case we don't do anything. If head
8451 is non-NULL, we prepend the DEFAULT case. The sorted list can
8452 then used during code generation for SELECT CASE constructs with
8453 a case expression of a CHARACTER type. */
8456 head
= check_case_overlap (head
);
8458 /* Prepend the default_case if it is there. */
8459 if (head
!= NULL
&& default_case
)
8461 default_case
->left
= NULL
;
8462 default_case
->right
= head
;
8463 head
->left
= default_case
;
8467 /* Eliminate dead blocks that may be the result if we've seen
8468 unreachable case labels for a block. */
8469 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8471 if (body
->block
->ext
.block
.case_list
== NULL
)
8473 /* Cut the unreachable block from the code chain. */
8474 gfc_code
*c
= body
->block
;
8475 body
->block
= c
->block
;
8477 /* Kill the dead block, but not the blocks below it. */
8479 gfc_free_statements (c
);
8483 /* More than two cases is legal but insane for logical selects.
8484 Issue a warning for it. */
8485 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8486 gfc_warning (OPT_Wsurprising
,
8487 "Logical SELECT CASE block at %L has more that two cases",
8492 /* Check if a derived type is extensible. */
8495 gfc_type_is_extensible (gfc_symbol
*sym
)
8497 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8498 || (sym
->attr
.is_class
8499 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8504 resolve_types (gfc_namespace
*ns
);
8506 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8507 correct as well as possibly the array-spec. */
8510 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8514 gcc_assert (sym
->assoc
);
8515 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8517 /* If this is for SELECT TYPE, the target may not yet be set. In that
8518 case, return. Resolution will be called later manually again when
8520 target
= sym
->assoc
->target
;
8523 gcc_assert (!sym
->assoc
->dangling
);
8525 if (resolve_target
&& !gfc_resolve_expr (target
))
8528 /* For variable targets, we get some attributes from the target. */
8529 if (target
->expr_type
== EXPR_VARIABLE
)
8533 gcc_assert (target
->symtree
);
8534 tsym
= target
->symtree
->n
.sym
;
8536 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8537 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8539 sym
->attr
.target
= tsym
->attr
.target
8540 || gfc_expr_attr (target
).pointer
;
8541 if (is_subref_array (target
))
8542 sym
->attr
.subref_array_pointer
= 1;
8545 if (target
->expr_type
== EXPR_NULL
)
8547 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8550 else if (target
->ts
.type
== BT_UNKNOWN
)
8552 gfc_error ("Selector at %L has no type", &target
->where
);
8556 /* Get type if this was not already set. Note that it can be
8557 some other type than the target in case this is a SELECT TYPE
8558 selector! So we must not update when the type is already there. */
8559 if (sym
->ts
.type
== BT_UNKNOWN
)
8560 sym
->ts
= target
->ts
;
8562 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8564 /* See if this is a valid association-to-variable. */
8565 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8566 && !gfc_has_vector_subscript (target
));
8568 /* Finally resolve if this is an array or not. */
8569 if (sym
->attr
.dimension
&& target
->rank
== 0)
8571 /* primary.c makes the assumption that a reference to an associate
8572 name followed by a left parenthesis is an array reference. */
8573 if (sym
->ts
.type
!= BT_CHARACTER
)
8574 gfc_error ("Associate-name %qs at %L is used as array",
8575 sym
->name
, &sym
->declared_at
);
8576 sym
->attr
.dimension
= 0;
8581 /* We cannot deal with class selectors that need temporaries. */
8582 if (target
->ts
.type
== BT_CLASS
8583 && gfc_ref_needs_temporary_p (target
->ref
))
8585 gfc_error ("CLASS selector at %L needs a temporary which is not "
8586 "yet implemented", &target
->where
);
8590 if (target
->ts
.type
== BT_CLASS
)
8591 gfc_fix_class_refs (target
);
8593 if (target
->rank
!= 0)
8596 /* The rank may be incorrectly guessed at parsing, therefore make sure
8597 it is corrected now. */
8598 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8601 sym
->as
= gfc_get_array_spec ();
8603 as
->rank
= target
->rank
;
8604 as
->type
= AS_DEFERRED
;
8605 as
->corank
= gfc_get_corank (target
);
8606 sym
->attr
.dimension
= 1;
8607 if (as
->corank
!= 0)
8608 sym
->attr
.codimension
= 1;
8613 /* target's rank is 0, but the type of the sym is still array valued,
8614 which has to be corrected. */
8615 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8618 symbol_attribute attr
;
8619 /* The associated variable's type is still the array type
8620 correct this now. */
8621 gfc_typespec
*ts
= &target
->ts
;
8624 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8629 ts
= &ref
->u
.c
.component
->ts
;
8632 if (ts
->type
== BT_CLASS
)
8633 ts
= &ts
->u
.derived
->components
->ts
;
8639 /* Create a scalar instance of the current class type. Because the
8640 rank of a class array goes into its name, the type has to be
8641 rebuild. The alternative of (re-)setting just the attributes
8642 and as in the current type, destroys the type also in other
8646 sym
->ts
.type
= BT_CLASS
;
8647 attr
= CLASS_DATA (sym
)->attr
;
8649 attr
.associate_var
= 1;
8650 attr
.dimension
= attr
.codimension
= 0;
8651 attr
.class_pointer
= 1;
8652 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8654 /* Make sure the _vptr is set. */
8655 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8656 if (c
->ts
.u
.derived
== NULL
)
8657 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8658 CLASS_DATA (sym
)->attr
.pointer
= 1;
8659 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8660 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8661 gfc_commit_symbol (sym
->ts
.u
.derived
);
8662 /* _vptr now has the _vtab in it, change it to the _vtype. */
8663 if (c
->ts
.u
.derived
->attr
.vtab
)
8664 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8665 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8666 resolve_types (c
->ts
.u
.derived
->ns
);
8670 /* Mark this as an associate variable. */
8671 sym
->attr
.associate_var
= 1;
8673 /* Fix up the type-spec for CHARACTER types. */
8674 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8677 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8679 if (!sym
->ts
.u
.cl
->length
8680 && !sym
->ts
.deferred
8681 && target
->expr_type
== EXPR_CONSTANT
)
8683 sym
->ts
.u
.cl
->length
=
8684 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8685 target
->value
.character
.length
);
8687 else if ((!sym
->ts
.u
.cl
->length
8688 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8689 && target
->expr_type
!= EXPR_VARIABLE
)
8691 sym
->ts
.u
.cl
= gfc_get_charlen();
8692 sym
->ts
.deferred
= 1;
8694 /* This is reset in trans-stmt.c after the assignment
8695 of the target expression to the associate name. */
8696 sym
->attr
.allocatable
= 1;
8700 /* If the target is a good class object, so is the associate variable. */
8701 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8702 sym
->attr
.class_ok
= 1;
8706 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8707 array reference, where necessary. The symbols are artificial and so
8708 the dimension attribute and arrayspec can also be set. In addition,
8709 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8710 This is corrected here as well.*/
8713 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8714 int rank
, gfc_ref
*ref
)
8716 gfc_ref
*nref
= (*expr1
)->ref
;
8717 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8718 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8719 (*expr1
)->rank
= rank
;
8720 if (sym1
->ts
.type
== BT_CLASS
)
8722 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8723 (*expr1
)->ts
= sym1
->ts
;
8725 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8726 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8727 CLASS_DATA (sym1
)->as
8728 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8732 sym1
->attr
.dimension
= 1;
8733 if (sym1
->as
== NULL
&& sym2
)
8734 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8737 for (; nref
; nref
= nref
->next
)
8738 if (nref
->next
== NULL
)
8741 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8742 nref
->next
= gfc_copy_ref (ref
);
8743 else if (ref
&& !nref
)
8744 (*expr1
)->ref
= gfc_copy_ref (ref
);
8749 build_loc_call (gfc_expr
*sym_expr
)
8752 loc_call
= gfc_get_expr ();
8753 loc_call
->expr_type
= EXPR_FUNCTION
;
8754 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8755 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8756 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8757 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8758 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8759 loc_call
->ts
.type
= BT_INTEGER
;
8760 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8761 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8762 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8763 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8764 loc_call
->where
= sym_expr
->where
;
8768 /* Resolve a SELECT TYPE statement. */
8771 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8773 gfc_symbol
*selector_type
;
8774 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8775 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8778 char name
[GFC_MAX_SYMBOL_LEN
];
8782 gfc_ref
* ref
= NULL
;
8783 gfc_expr
*selector_expr
= NULL
;
8785 ns
= code
->ext
.block
.ns
;
8788 /* Check for F03:C813. */
8789 if (code
->expr1
->ts
.type
!= BT_CLASS
8790 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8792 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8793 "at %L", &code
->loc
);
8797 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8802 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8803 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8804 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8806 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8807 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8809 /* F2008: C803 The selector expression must not be coindexed. */
8810 if (gfc_is_coindexed (code
->expr2
))
8812 gfc_error ("Selector at %L must not be coindexed",
8813 &code
->expr2
->where
);
8820 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8822 if (gfc_is_coindexed (code
->expr1
))
8824 gfc_error ("Selector at %L must not be coindexed",
8825 &code
->expr1
->where
);
8830 /* Loop over TYPE IS / CLASS IS cases. */
8831 for (body
= code
->block
; body
; body
= body
->block
)
8833 c
= body
->ext
.block
.case_list
;
8837 /* Check for repeated cases. */
8838 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8840 gfc_case
*d
= tail
->ext
.block
.case_list
;
8844 if (c
->ts
.type
== d
->ts
.type
8845 && ((c
->ts
.type
== BT_DERIVED
8846 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8847 && !strcmp (c
->ts
.u
.derived
->name
,
8848 d
->ts
.u
.derived
->name
))
8849 || c
->ts
.type
== BT_UNKNOWN
8850 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8851 && c
->ts
.kind
== d
->ts
.kind
)))
8853 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8854 &c
->where
, &d
->where
);
8860 /* Check F03:C815. */
8861 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8862 && !selector_type
->attr
.unlimited_polymorphic
8863 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8865 gfc_error ("Derived type %qs at %L must be extensible",
8866 c
->ts
.u
.derived
->name
, &c
->where
);
8871 /* Check F03:C816. */
8872 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8873 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8874 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8876 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8877 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8878 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8880 gfc_error ("Unexpected intrinsic type %qs at %L",
8881 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8886 /* Check F03:C814. */
8887 if (c
->ts
.type
== BT_CHARACTER
8888 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8890 gfc_error ("The type-spec at %L shall specify that each length "
8891 "type parameter is assumed", &c
->where
);
8896 /* Intercept the DEFAULT case. */
8897 if (c
->ts
.type
== BT_UNKNOWN
)
8899 /* Check F03:C818. */
8902 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8903 "by a second DEFAULT CASE at %L",
8904 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8909 default_case
= body
;
8916 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8917 target if present. If there are any EXIT statements referring to the
8918 SELECT TYPE construct, this is no problem because the gfc_code
8919 reference stays the same and EXIT is equally possible from the BLOCK
8920 it is changed to. */
8921 code
->op
= EXEC_BLOCK
;
8924 gfc_association_list
* assoc
;
8926 assoc
= gfc_get_association_list ();
8927 assoc
->st
= code
->expr1
->symtree
;
8928 assoc
->target
= gfc_copy_expr (code
->expr2
);
8929 assoc
->target
->where
= code
->expr2
->where
;
8930 /* assoc->variable will be set by resolve_assoc_var. */
8932 code
->ext
.block
.assoc
= assoc
;
8933 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8935 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8938 code
->ext
.block
.assoc
= NULL
;
8940 /* Ensure that the selector rank and arrayspec are available to
8941 correct expressions in which they might be missing. */
8942 if (code
->expr2
&& code
->expr2
->rank
)
8944 rank
= code
->expr2
->rank
;
8945 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8946 if (ref
->next
== NULL
)
8948 if (ref
&& ref
->type
== REF_ARRAY
)
8949 ref
= gfc_copy_ref (ref
);
8951 /* Fixup expr1 if necessary. */
8953 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8955 else if (code
->expr1
->rank
)
8957 rank
= code
->expr1
->rank
;
8958 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8959 if (ref
->next
== NULL
)
8961 if (ref
&& ref
->type
== REF_ARRAY
)
8962 ref
= gfc_copy_ref (ref
);
8965 /* Add EXEC_SELECT to switch on type. */
8966 new_st
= gfc_get_code (code
->op
);
8967 new_st
->expr1
= code
->expr1
;
8968 new_st
->expr2
= code
->expr2
;
8969 new_st
->block
= code
->block
;
8970 code
->expr1
= code
->expr2
= NULL
;
8975 ns
->code
->next
= new_st
;
8977 code
->op
= EXEC_SELECT_TYPE
;
8979 /* Use the intrinsic LOC function to generate an integer expression
8980 for the vtable of the selector. Note that the rank of the selector
8981 expression has to be set to zero. */
8982 gfc_add_vptr_component (code
->expr1
);
8983 code
->expr1
->rank
= 0;
8984 code
->expr1
= build_loc_call (code
->expr1
);
8985 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8987 /* Loop over TYPE IS / CLASS IS cases. */
8988 for (body
= code
->block
; body
; body
= body
->block
)
8992 c
= body
->ext
.block
.case_list
;
8994 /* Generate an index integer expression for address of the
8995 TYPE/CLASS vtable and store it in c->low. The hash expression
8996 is stored in c->high and is used to resolve intrinsic cases. */
8997 if (c
->ts
.type
!= BT_UNKNOWN
)
8999 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9001 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9003 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9004 c
->ts
.u
.derived
->hash_value
);
9008 vtab
= gfc_find_vtab (&c
->ts
);
9009 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9010 e
= CLASS_DATA (vtab
)->initializer
;
9011 c
->high
= gfc_copy_expr (e
);
9012 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9015 ts
.kind
= gfc_integer_4_kind
;
9016 ts
.type
= BT_INTEGER
;
9017 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9021 e
= gfc_lval_expr_from_sym (vtab
);
9022 c
->low
= build_loc_call (e
);
9027 /* Associate temporary to selector. This should only be done
9028 when this case is actually true, so build a new ASSOCIATE
9029 that does precisely this here (instead of using the
9032 if (c
->ts
.type
== BT_CLASS
)
9033 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9034 else if (c
->ts
.type
== BT_DERIVED
)
9035 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9036 else if (c
->ts
.type
== BT_CHARACTER
)
9038 HOST_WIDE_INT charlen
= 0;
9039 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9040 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9041 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9042 snprintf (name
, sizeof (name
),
9043 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9044 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9047 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9050 st
= gfc_find_symtree (ns
->sym_root
, name
);
9051 gcc_assert (st
->n
.sym
->assoc
);
9052 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9053 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9054 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9056 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9057 /* Fixup the target expression if necessary. */
9059 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9062 new_st
= gfc_get_code (EXEC_BLOCK
);
9063 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9064 new_st
->ext
.block
.ns
->code
= body
->next
;
9065 body
->next
= new_st
;
9067 /* Chain in the new list only if it is marked as dangling. Otherwise
9068 there is a CASE label overlap and this is already used. Just ignore,
9069 the error is diagnosed elsewhere. */
9070 if (st
->n
.sym
->assoc
->dangling
)
9072 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9073 st
->n
.sym
->assoc
->dangling
= 0;
9076 resolve_assoc_var (st
->n
.sym
, false);
9079 /* Take out CLASS IS cases for separate treatment. */
9081 while (body
&& body
->block
)
9083 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9085 /* Add to class_is list. */
9086 if (class_is
== NULL
)
9088 class_is
= body
->block
;
9093 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9094 tail
->block
= body
->block
;
9097 /* Remove from EXEC_SELECT list. */
9098 body
->block
= body
->block
->block
;
9111 /* Add a default case to hold the CLASS IS cases. */
9112 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9113 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9115 tail
->ext
.block
.case_list
= gfc_get_case ();
9116 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9118 default_case
= tail
;
9121 /* More than one CLASS IS block? */
9122 if (class_is
->block
)
9126 /* Sort CLASS IS blocks by extension level. */
9130 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9133 /* F03:C817 (check for doubles). */
9134 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9135 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9137 gfc_error ("Double CLASS IS block in SELECT TYPE "
9139 &c2
->ext
.block
.case_list
->where
);
9142 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9143 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9146 (*c1
)->block
= c2
->block
;
9156 /* Generate IF chain. */
9157 if_st
= gfc_get_code (EXEC_IF
);
9159 for (body
= class_is
; body
; body
= body
->block
)
9161 new_st
->block
= gfc_get_code (EXEC_IF
);
9162 new_st
= new_st
->block
;
9163 /* Set up IF condition: Call _gfortran_is_extension_of. */
9164 new_st
->expr1
= gfc_get_expr ();
9165 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9166 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9167 new_st
->expr1
->ts
.kind
= 4;
9168 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9169 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9170 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9171 /* Set up arguments. */
9172 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9173 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9174 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9175 new_st
->expr1
->where
= code
->loc
;
9176 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9177 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9178 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9179 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9180 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9181 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9182 new_st
->next
= body
->next
;
9184 if (default_case
->next
)
9186 new_st
->block
= gfc_get_code (EXEC_IF
);
9187 new_st
= new_st
->block
;
9188 new_st
->next
= default_case
->next
;
9191 /* Replace CLASS DEFAULT code by the IF chain. */
9192 default_case
->next
= if_st
;
9195 /* Resolve the internal code. This can not be done earlier because
9196 it requires that the sym->assoc of selectors is set already. */
9197 gfc_current_ns
= ns
;
9198 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9199 gfc_current_ns
= old_ns
;
9206 /* Resolve a transfer statement. This is making sure that:
9207 -- a derived type being transferred has only non-pointer components
9208 -- a derived type being transferred doesn't have private components, unless
9209 it's being transferred from the module where the type was defined
9210 -- we're not trying to transfer a whole assumed size array. */
9213 resolve_transfer (gfc_code
*code
)
9216 gfc_symbol
*sym
, *derived
;
9220 bool formatted
= false;
9221 gfc_dt
*dt
= code
->ext
.dt
;
9222 gfc_symbol
*dtio_sub
= NULL
;
9226 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9227 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9228 exp
= exp
->value
.op
.op1
;
9230 if (exp
&& exp
->expr_type
== EXPR_NULL
9233 gfc_error ("Invalid context for NULL () intrinsic at %L",
9238 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9239 && exp
->expr_type
!= EXPR_FUNCTION
9240 && exp
->expr_type
!= EXPR_STRUCTURE
))
9243 /* If we are reading, the variable will be changed. Note that
9244 code->ext.dt may be NULL if the TRANSFER is related to
9245 an INQUIRE statement -- but in this case, we are not reading, either. */
9246 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9247 && !gfc_check_vardef_context (exp
, false, false, false,
9251 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9253 /* Go to actual component transferred. */
9254 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9255 if (ref
->type
== REF_COMPONENT
)
9256 ts
= &ref
->u
.c
.component
->ts
;
9258 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9259 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9261 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9262 derived
= ts
->u
.derived
;
9264 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9266 /* Determine when to use the formatted DTIO procedure. */
9267 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9270 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9271 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9272 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9274 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9277 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9278 /* Check to see if this is a nested DTIO call, with the
9279 dummy as the io-list object. */
9280 if (sym
&& sym
== dtio_sub
&& sym
->formal
9281 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9282 && exp
->ref
== NULL
)
9284 if (!sym
->attr
.recursive
)
9286 gfc_error ("DTIO %s procedure at %L must be recursive",
9287 sym
->name
, &sym
->declared_at
);
9294 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9296 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9297 "it is processed by a defined input/output procedure",
9302 if (ts
->type
== BT_DERIVED
)
9304 /* Check that transferred derived type doesn't contain POINTER
9305 components unless it is processed by a defined input/output
9307 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9309 gfc_error ("Data transfer element at %L cannot have POINTER "
9310 "components unless it is processed by a defined "
9311 "input/output procedure", &code
->loc
);
9316 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9318 gfc_error ("Data transfer element at %L cannot have "
9319 "procedure pointer components", &code
->loc
);
9323 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9325 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9326 "components unless it is processed by a defined "
9327 "input/output procedure", &code
->loc
);
9331 /* C_PTR and C_FUNPTR have private components which means they can not
9332 be printed. However, if -std=gnu and not -pedantic, allow
9333 the component to be printed to help debugging. */
9334 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9336 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9337 "cannot have PRIVATE components", &code
->loc
))
9340 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9342 gfc_error ("Data transfer element at %L cannot have "
9343 "PRIVATE components unless it is processed by "
9344 "a defined input/output procedure", &code
->loc
);
9349 if (exp
->expr_type
== EXPR_STRUCTURE
)
9352 sym
= exp
->symtree
->n
.sym
;
9354 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9355 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9357 gfc_error ("Data transfer element at %L cannot be a full reference to "
9358 "an assumed-size array", &code
->loc
);
9362 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9363 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9367 /*********** Toplevel code resolution subroutines ***********/
9369 /* Find the set of labels that are reachable from this block. We also
9370 record the last statement in each block. */
9373 find_reachable_labels (gfc_code
*block
)
9380 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9382 /* Collect labels in this block. We don't keep those corresponding
9383 to END {IF|SELECT}, these are checked in resolve_branch by going
9384 up through the code_stack. */
9385 for (c
= block
; c
; c
= c
->next
)
9387 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9388 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9391 /* Merge with labels from parent block. */
9394 gcc_assert (cs_base
->prev
->reachable_labels
);
9395 bitmap_ior_into (cs_base
->reachable_labels
,
9396 cs_base
->prev
->reachable_labels
);
9402 resolve_lock_unlock_event (gfc_code
*code
)
9404 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9405 && code
->expr1
->value
.function
.isym
9406 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9407 remove_caf_get_intrinsic (code
->expr1
);
9409 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9410 && (code
->expr1
->ts
.type
!= BT_DERIVED
9411 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9412 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9413 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9414 || code
->expr1
->rank
!= 0
9415 || (!gfc_is_coarray (code
->expr1
) &&
9416 !gfc_is_coindexed (code
->expr1
))))
9417 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9418 &code
->expr1
->where
);
9419 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9420 && (code
->expr1
->ts
.type
!= BT_DERIVED
9421 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9422 || code
->expr1
->ts
.u
.derived
->from_intmod
9423 != INTMOD_ISO_FORTRAN_ENV
9424 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9425 != ISOFORTRAN_EVENT_TYPE
9426 || code
->expr1
->rank
!= 0))
9427 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9428 &code
->expr1
->where
);
9429 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9430 && !gfc_is_coindexed (code
->expr1
))
9431 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9432 &code
->expr1
->where
);
9433 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9434 gfc_error ("Event variable argument at %L must be a coarray but not "
9435 "coindexed", &code
->expr1
->where
);
9439 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9440 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9441 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9442 &code
->expr2
->where
);
9445 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9446 _("STAT variable")))
9451 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9452 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9453 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9454 &code
->expr3
->where
);
9457 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9458 _("ERRMSG variable")))
9461 /* Check for LOCK the ACQUIRED_LOCK. */
9462 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9463 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9464 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9465 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9466 "variable", &code
->expr4
->where
);
9468 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9469 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9470 _("ACQUIRED_LOCK variable")))
9473 /* Check for EVENT WAIT the UNTIL_COUNT. */
9474 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9476 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9477 || code
->expr4
->rank
!= 0)
9478 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9479 "expression", &code
->expr4
->where
);
9485 resolve_critical (gfc_code
*code
)
9487 gfc_symtree
*symtree
;
9488 gfc_symbol
*lock_type
;
9489 char name
[GFC_MAX_SYMBOL_LEN
];
9490 static int serial
= 0;
9492 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9495 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9496 GFC_PREFIX ("lock_type"));
9498 lock_type
= symtree
->n
.sym
;
9501 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9504 lock_type
= symtree
->n
.sym
;
9505 lock_type
->attr
.flavor
= FL_DERIVED
;
9506 lock_type
->attr
.zero_comp
= 1;
9507 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9508 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9511 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9512 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9515 code
->resolved_sym
= symtree
->n
.sym
;
9516 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9517 symtree
->n
.sym
->attr
.referenced
= 1;
9518 symtree
->n
.sym
->attr
.artificial
= 1;
9519 symtree
->n
.sym
->attr
.codimension
= 1;
9520 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9521 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9522 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9523 symtree
->n
.sym
->as
->corank
= 1;
9524 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9525 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9526 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9528 gfc_commit_symbols();
9533 resolve_sync (gfc_code
*code
)
9535 /* Check imageset. The * case matches expr1 == NULL. */
9538 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9539 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9540 "INTEGER expression", &code
->expr1
->where
);
9541 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9542 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9543 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9544 &code
->expr1
->where
);
9545 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9546 && gfc_simplify_expr (code
->expr1
, 0))
9548 gfc_constructor
*cons
;
9549 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9550 for (; cons
; cons
= gfc_constructor_next (cons
))
9551 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9552 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9553 gfc_error ("Imageset argument at %L must between 1 and "
9554 "num_images()", &cons
->expr
->where
);
9559 gfc_resolve_expr (code
->expr2
);
9561 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9562 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9563 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9564 &code
->expr2
->where
);
9567 gfc_resolve_expr (code
->expr3
);
9569 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9570 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9571 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9572 &code
->expr3
->where
);
9576 /* Given a branch to a label, see if the branch is conforming.
9577 The code node describes where the branch is located. */
9580 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9587 /* Step one: is this a valid branching target? */
9589 if (label
->defined
== ST_LABEL_UNKNOWN
)
9591 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9596 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9598 gfc_error ("Statement at %L is not a valid branch target statement "
9599 "for the branch statement at %L", &label
->where
, &code
->loc
);
9603 /* Step two: make sure this branch is not a branch to itself ;-) */
9605 if (code
->here
== label
)
9608 "Branch at %L may result in an infinite loop", &code
->loc
);
9612 /* Step three: See if the label is in the same block as the
9613 branching statement. The hard work has been done by setting up
9614 the bitmap reachable_labels. */
9616 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9618 /* Check now whether there is a CRITICAL construct; if so, check
9619 whether the label is still visible outside of the CRITICAL block,
9620 which is invalid. */
9621 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9623 if (stack
->current
->op
== EXEC_CRITICAL
9624 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9625 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9626 "label at %L", &code
->loc
, &label
->where
);
9627 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9628 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9629 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9630 "for label at %L", &code
->loc
, &label
->where
);
9636 /* Step four: If we haven't found the label in the bitmap, it may
9637 still be the label of the END of the enclosing block, in which
9638 case we find it by going up the code_stack. */
9640 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9642 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9644 if (stack
->current
->op
== EXEC_CRITICAL
)
9646 /* Note: A label at END CRITICAL does not leave the CRITICAL
9647 construct as END CRITICAL is still part of it. */
9648 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9649 " at %L", &code
->loc
, &label
->where
);
9652 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9654 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9655 "label at %L", &code
->loc
, &label
->where
);
9662 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9666 /* The label is not in an enclosing block, so illegal. This was
9667 allowed in Fortran 66, so we allow it as extension. No
9668 further checks are necessary in this case. */
9669 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9670 "as the GOTO statement at %L", &label
->where
,
9676 /* Check whether EXPR1 has the same shape as EXPR2. */
9679 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9681 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9682 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9683 bool result
= false;
9686 /* Compare the rank. */
9687 if (expr1
->rank
!= expr2
->rank
)
9690 /* Compare the size of each dimension. */
9691 for (i
=0; i
<expr1
->rank
; i
++)
9693 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9696 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9699 if (mpz_cmp (shape
[i
], shape2
[i
]))
9703 /* When either of the two expression is an assumed size array, we
9704 ignore the comparison of dimension sizes. */
9709 gfc_clear_shape (shape
, i
);
9710 gfc_clear_shape (shape2
, i
);
9715 /* Check whether a WHERE assignment target or a WHERE mask expression
9716 has the same shape as the outmost WHERE mask expression. */
9719 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9725 cblock
= code
->block
;
9727 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9728 In case of nested WHERE, only the outmost one is stored. */
9729 if (mask
== NULL
) /* outmost WHERE */
9731 else /* inner WHERE */
9738 /* Check if the mask-expr has a consistent shape with the
9739 outmost WHERE mask-expr. */
9740 if (!resolve_where_shape (cblock
->expr1
, e
))
9741 gfc_error ("WHERE mask at %L has inconsistent shape",
9742 &cblock
->expr1
->where
);
9745 /* the assignment statement of a WHERE statement, or the first
9746 statement in where-body-construct of a WHERE construct */
9747 cnext
= cblock
->next
;
9752 /* WHERE assignment statement */
9755 /* Check shape consistent for WHERE assignment target. */
9756 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9757 gfc_error ("WHERE assignment target at %L has "
9758 "inconsistent shape", &cnext
->expr1
->where
);
9762 case EXEC_ASSIGN_CALL
:
9763 resolve_call (cnext
);
9764 if (!cnext
->resolved_sym
->attr
.elemental
)
9765 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9766 &cnext
->ext
.actual
->expr
->where
);
9769 /* WHERE or WHERE construct is part of a where-body-construct */
9771 resolve_where (cnext
, e
);
9775 gfc_error ("Unsupported statement inside WHERE at %L",
9778 /* the next statement within the same where-body-construct */
9779 cnext
= cnext
->next
;
9781 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9782 cblock
= cblock
->block
;
9787 /* Resolve assignment in FORALL construct.
9788 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9789 FORALL index variables. */
9792 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9796 for (n
= 0; n
< nvar
; n
++)
9798 gfc_symbol
*forall_index
;
9800 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9802 /* Check whether the assignment target is one of the FORALL index
9804 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9805 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9806 gfc_error ("Assignment to a FORALL index variable at %L",
9807 &code
->expr1
->where
);
9810 /* If one of the FORALL index variables doesn't appear in the
9811 assignment variable, then there could be a many-to-one
9812 assignment. Emit a warning rather than an error because the
9813 mask could be resolving this problem. */
9814 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9815 gfc_warning (0, "The FORALL with index %qs is not used on the "
9816 "left side of the assignment at %L and so might "
9817 "cause multiple assignment to this object",
9818 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9824 /* Resolve WHERE statement in FORALL construct. */
9827 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9828 gfc_expr
**var_expr
)
9833 cblock
= code
->block
;
9836 /* the assignment statement of a WHERE statement, or the first
9837 statement in where-body-construct of a WHERE construct */
9838 cnext
= cblock
->next
;
9843 /* WHERE assignment statement */
9845 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9848 /* WHERE operator assignment statement */
9849 case EXEC_ASSIGN_CALL
:
9850 resolve_call (cnext
);
9851 if (!cnext
->resolved_sym
->attr
.elemental
)
9852 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9853 &cnext
->ext
.actual
->expr
->where
);
9856 /* WHERE or WHERE construct is part of a where-body-construct */
9858 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9862 gfc_error ("Unsupported statement inside WHERE at %L",
9865 /* the next statement within the same where-body-construct */
9866 cnext
= cnext
->next
;
9868 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9869 cblock
= cblock
->block
;
9874 /* Traverse the FORALL body to check whether the following errors exist:
9875 1. For assignment, check if a many-to-one assignment happens.
9876 2. For WHERE statement, check the WHERE body to see if there is any
9877 many-to-one assignment. */
9880 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9884 c
= code
->block
->next
;
9890 case EXEC_POINTER_ASSIGN
:
9891 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9894 case EXEC_ASSIGN_CALL
:
9898 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9899 there is no need to handle it here. */
9903 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9908 /* The next statement in the FORALL body. */
9914 /* Counts the number of iterators needed inside a forall construct, including
9915 nested forall constructs. This is used to allocate the needed memory
9916 in gfc_resolve_forall. */
9919 gfc_count_forall_iterators (gfc_code
*code
)
9921 int max_iters
, sub_iters
, current_iters
;
9922 gfc_forall_iterator
*fa
;
9924 gcc_assert(code
->op
== EXEC_FORALL
);
9928 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9931 code
= code
->block
->next
;
9935 if (code
->op
== EXEC_FORALL
)
9937 sub_iters
= gfc_count_forall_iterators (code
);
9938 if (sub_iters
> max_iters
)
9939 max_iters
= sub_iters
;
9944 return current_iters
+ max_iters
;
9948 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9949 gfc_resolve_forall_body to resolve the FORALL body. */
9952 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9954 static gfc_expr
**var_expr
;
9955 static int total_var
= 0;
9956 static int nvar
= 0;
9957 int i
, old_nvar
, tmp
;
9958 gfc_forall_iterator
*fa
;
9962 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
9965 /* Start to resolve a FORALL construct */
9966 if (forall_save
== 0)
9968 /* Count the total number of FORALL indices in the nested FORALL
9969 construct in order to allocate the VAR_EXPR with proper size. */
9970 total_var
= gfc_count_forall_iterators (code
);
9972 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9973 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9976 /* The information about FORALL iterator, including FORALL indices start, end
9977 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9978 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9980 /* Fortran 20008: C738 (R753). */
9981 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9983 gfc_error ("FORALL index-name at %L must be a scalar variable "
9984 "of type integer", &fa
->var
->where
);
9988 /* Check if any outer FORALL index name is the same as the current
9990 for (i
= 0; i
< nvar
; i
++)
9992 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9993 gfc_error ("An outer FORALL construct already has an index "
9994 "with this name %L", &fa
->var
->where
);
9997 /* Record the current FORALL index. */
9998 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10002 /* No memory leak. */
10003 gcc_assert (nvar
<= total_var
);
10006 /* Resolve the FORALL body. */
10007 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10009 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10010 gfc_resolve_blocks (code
->block
, ns
);
10014 /* Free only the VAR_EXPRs allocated in this frame. */
10015 for (i
= nvar
; i
< tmp
; i
++)
10016 gfc_free_expr (var_expr
[i
]);
10020 /* We are in the outermost FORALL construct. */
10021 gcc_assert (forall_save
== 0);
10023 /* VAR_EXPR is not needed any more. */
10030 /* Resolve a BLOCK construct statement. */
10033 resolve_block_construct (gfc_code
* code
)
10035 /* Resolve the BLOCK's namespace. */
10036 gfc_resolve (code
->ext
.block
.ns
);
10038 /* For an ASSOCIATE block, the associations (and their targets) are already
10039 resolved during resolve_symbol. */
10043 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10047 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10051 for (; b
; b
= b
->block
)
10053 t
= gfc_resolve_expr (b
->expr1
);
10054 if (!gfc_resolve_expr (b
->expr2
))
10060 if (t
&& b
->expr1
!= NULL
10061 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10062 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10068 && b
->expr1
!= NULL
10069 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10070 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10075 resolve_branch (b
->label1
, b
);
10079 resolve_block_construct (b
);
10083 case EXEC_SELECT_TYPE
:
10086 case EXEC_DO_WHILE
:
10087 case EXEC_DO_CONCURRENT
:
10088 case EXEC_CRITICAL
:
10091 case EXEC_IOLENGTH
:
10095 case EXEC_OMP_ATOMIC
:
10096 case EXEC_OACC_ATOMIC
:
10098 gfc_omp_atomic_op aop
10099 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10101 /* Verify this before calling gfc_resolve_code, which might
10103 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10104 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10105 && b
->next
->next
== NULL
)
10106 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10107 && b
->next
->next
!= NULL
10108 && b
->next
->next
->op
== EXEC_ASSIGN
10109 && b
->next
->next
->next
== NULL
));
10113 case EXEC_OACC_PARALLEL_LOOP
:
10114 case EXEC_OACC_PARALLEL
:
10115 case EXEC_OACC_KERNELS_LOOP
:
10116 case EXEC_OACC_KERNELS
:
10117 case EXEC_OACC_DATA
:
10118 case EXEC_OACC_HOST_DATA
:
10119 case EXEC_OACC_LOOP
:
10120 case EXEC_OACC_UPDATE
:
10121 case EXEC_OACC_WAIT
:
10122 case EXEC_OACC_CACHE
:
10123 case EXEC_OACC_ENTER_DATA
:
10124 case EXEC_OACC_EXIT_DATA
:
10125 case EXEC_OACC_ROUTINE
:
10126 case EXEC_OMP_CRITICAL
:
10127 case EXEC_OMP_DISTRIBUTE
:
10128 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10129 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10130 case EXEC_OMP_DISTRIBUTE_SIMD
:
10132 case EXEC_OMP_DO_SIMD
:
10133 case EXEC_OMP_MASTER
:
10134 case EXEC_OMP_ORDERED
:
10135 case EXEC_OMP_PARALLEL
:
10136 case EXEC_OMP_PARALLEL_DO
:
10137 case EXEC_OMP_PARALLEL_DO_SIMD
:
10138 case EXEC_OMP_PARALLEL_SECTIONS
:
10139 case EXEC_OMP_PARALLEL_WORKSHARE
:
10140 case EXEC_OMP_SECTIONS
:
10141 case EXEC_OMP_SIMD
:
10142 case EXEC_OMP_SINGLE
:
10143 case EXEC_OMP_TARGET
:
10144 case EXEC_OMP_TARGET_DATA
:
10145 case EXEC_OMP_TARGET_ENTER_DATA
:
10146 case EXEC_OMP_TARGET_EXIT_DATA
:
10147 case EXEC_OMP_TARGET_PARALLEL
:
10148 case EXEC_OMP_TARGET_PARALLEL_DO
:
10149 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10150 case EXEC_OMP_TARGET_SIMD
:
10151 case EXEC_OMP_TARGET_TEAMS
:
10152 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10153 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10154 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10155 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10156 case EXEC_OMP_TARGET_UPDATE
:
10157 case EXEC_OMP_TASK
:
10158 case EXEC_OMP_TASKGROUP
:
10159 case EXEC_OMP_TASKLOOP
:
10160 case EXEC_OMP_TASKLOOP_SIMD
:
10161 case EXEC_OMP_TASKWAIT
:
10162 case EXEC_OMP_TASKYIELD
:
10163 case EXEC_OMP_TEAMS
:
10164 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10165 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10166 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10167 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10168 case EXEC_OMP_WORKSHARE
:
10172 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10175 gfc_resolve_code (b
->next
, ns
);
10180 /* Does everything to resolve an ordinary assignment. Returns true
10181 if this is an interface assignment. */
10183 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10190 symbol_attribute attr
;
10192 if (gfc_extend_assign (code
, ns
))
10196 if (code
->op
== EXEC_ASSIGN_CALL
)
10198 lhs
= code
->ext
.actual
->expr
;
10199 rhsptr
= &code
->ext
.actual
->next
->expr
;
10203 gfc_actual_arglist
* args
;
10204 gfc_typebound_proc
* tbp
;
10206 gcc_assert (code
->op
== EXEC_COMPCALL
);
10208 args
= code
->expr1
->value
.compcall
.actual
;
10210 rhsptr
= &args
->next
->expr
;
10212 tbp
= code
->expr1
->value
.compcall
.tbp
;
10213 gcc_assert (!tbp
->is_generic
);
10216 /* Make a temporary rhs when there is a default initializer
10217 and rhs is the same symbol as the lhs. */
10218 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10219 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10220 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10221 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10222 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10231 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10232 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10236 /* Handle the case of a BOZ literal on the RHS. */
10237 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10240 if (warn_surprising
)
10241 gfc_warning (OPT_Wsurprising
,
10242 "BOZ literal at %L is bitwise transferred "
10243 "non-integer symbol %qs", &code
->loc
,
10244 lhs
->symtree
->n
.sym
->name
);
10246 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10248 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10250 if (rc
== ARITH_UNDERFLOW
)
10251 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10252 ". This check can be disabled with the option "
10253 "%<-fno-range-check%>", &rhs
->where
);
10254 else if (rc
== ARITH_OVERFLOW
)
10255 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10256 ". This check can be disabled with the option "
10257 "%<-fno-range-check%>", &rhs
->where
);
10258 else if (rc
== ARITH_NAN
)
10259 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10260 ". This check can be disabled with the option "
10261 "%<-fno-range-check%>", &rhs
->where
);
10266 if (lhs
->ts
.type
== BT_CHARACTER
10267 && warn_character_truncation
)
10269 HOST_WIDE_INT llen
= 0, rlen
= 0;
10270 if (lhs
->ts
.u
.cl
!= NULL
10271 && lhs
->ts
.u
.cl
->length
!= NULL
10272 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10273 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10275 if (rhs
->expr_type
== EXPR_CONSTANT
)
10276 rlen
= rhs
->value
.character
.length
;
10278 else if (rhs
->ts
.u
.cl
!= NULL
10279 && rhs
->ts
.u
.cl
->length
!= NULL
10280 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10281 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10283 if (rlen
&& llen
&& rlen
> llen
)
10284 gfc_warning_now (OPT_Wcharacter_truncation
,
10285 "CHARACTER expression will be truncated "
10286 "in assignment (%ld/%ld) at %L",
10287 (long) llen
, (long) rlen
, &code
->loc
);
10290 /* Ensure that a vector index expression for the lvalue is evaluated
10291 to a temporary if the lvalue symbol is referenced in it. */
10294 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10295 if (ref
->type
== REF_ARRAY
)
10297 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10298 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10299 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10300 ref
->u
.ar
.start
[n
]))
10302 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10306 if (gfc_pure (NULL
))
10308 if (lhs
->ts
.type
== BT_DERIVED
10309 && lhs
->expr_type
== EXPR_VARIABLE
10310 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10311 && rhs
->expr_type
== EXPR_VARIABLE
10312 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10313 || gfc_is_coindexed (rhs
)))
10315 /* F2008, C1283. */
10316 if (gfc_is_coindexed (rhs
))
10317 gfc_error ("Coindexed expression at %L is assigned to "
10318 "a derived type variable with a POINTER "
10319 "component in a PURE procedure",
10322 gfc_error ("The impure variable at %L is assigned to "
10323 "a derived type variable with a POINTER "
10324 "component in a PURE procedure (12.6)",
10329 /* Fortran 2008, C1283. */
10330 if (gfc_is_coindexed (lhs
))
10332 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10333 "procedure", &rhs
->where
);
10338 if (gfc_implicit_pure (NULL
))
10340 if (lhs
->expr_type
== EXPR_VARIABLE
10341 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10342 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10343 gfc_unset_implicit_pure (NULL
);
10345 if (lhs
->ts
.type
== BT_DERIVED
10346 && lhs
->expr_type
== EXPR_VARIABLE
10347 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10348 && rhs
->expr_type
== EXPR_VARIABLE
10349 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10350 || gfc_is_coindexed (rhs
)))
10351 gfc_unset_implicit_pure (NULL
);
10353 /* Fortran 2008, C1283. */
10354 if (gfc_is_coindexed (lhs
))
10355 gfc_unset_implicit_pure (NULL
);
10358 /* F2008, 7.2.1.2. */
10359 attr
= gfc_expr_attr (lhs
);
10360 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10362 if (attr
.codimension
)
10364 gfc_error ("Assignment to polymorphic coarray at %L is not "
10365 "permitted", &lhs
->where
);
10368 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10369 "polymorphic variable at %L", &lhs
->where
))
10371 if (!flag_realloc_lhs
)
10373 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10374 "requires %<-frealloc-lhs%>", &lhs
->where
);
10378 else if (lhs
->ts
.type
== BT_CLASS
)
10380 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10381 "assignment at %L - check that there is a matching specific "
10382 "subroutine for '=' operator", &lhs
->where
);
10386 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10388 /* F2008, Section 7.2.1.2. */
10389 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10391 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10392 "component in assignment at %L", &lhs
->where
);
10396 /* Assign the 'data' of a class object to a derived type. */
10397 if (lhs
->ts
.type
== BT_DERIVED
10398 && rhs
->ts
.type
== BT_CLASS
10399 && rhs
->expr_type
!= EXPR_ARRAY
)
10400 gfc_add_data_component (rhs
);
10402 /* Make sure there is a vtable and, in particular, a _copy for the
10404 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10405 gfc_find_vtab (&rhs
->ts
);
10407 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10409 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10410 && code
->expr2
->value
.function
.isym
10411 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10412 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10413 && !gfc_expr_attr (rhs
).allocatable
10414 && !gfc_has_vector_subscript (rhs
)));
10416 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10418 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10419 Additionally, insert this code when the RHS is a CAF as we then use the
10420 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10421 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10422 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10424 if (caf_convert_to_send
)
10426 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10427 && code
->expr2
->value
.function
.isym
10428 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10429 remove_caf_get_intrinsic (code
->expr2
);
10430 code
->op
= EXEC_CALL
;
10431 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10432 code
->resolved_sym
= code
->symtree
->n
.sym
;
10433 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10434 code
->resolved_sym
->attr
.intrinsic
= 1;
10435 code
->resolved_sym
->attr
.subroutine
= 1;
10436 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10437 gfc_commit_symbol (code
->resolved_sym
);
10438 code
->ext
.actual
= gfc_get_actual_arglist ();
10439 code
->ext
.actual
->expr
= lhs
;
10440 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10441 code
->ext
.actual
->next
->expr
= rhs
;
10442 code
->expr1
= NULL
;
10443 code
->expr2
= NULL
;
10450 /* Add a component reference onto an expression. */
10453 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10458 ref
= &((*ref
)->next
);
10459 *ref
= gfc_get_ref ();
10460 (*ref
)->type
= REF_COMPONENT
;
10461 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10462 (*ref
)->u
.c
.component
= c
;
10465 /* Add a full array ref, as necessary. */
10468 gfc_add_full_array_ref (e
, c
->as
);
10469 e
->rank
= c
->as
->rank
;
10474 /* Build an assignment. Keep the argument 'op' for future use, so that
10475 pointer assignments can be made. */
10478 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10479 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10481 gfc_code
*this_code
;
10483 this_code
= gfc_get_code (op
);
10484 this_code
->next
= NULL
;
10485 this_code
->expr1
= gfc_copy_expr (expr1
);
10486 this_code
->expr2
= gfc_copy_expr (expr2
);
10487 this_code
->loc
= loc
;
10488 if (comp1
&& comp2
)
10490 add_comp_ref (this_code
->expr1
, comp1
);
10491 add_comp_ref (this_code
->expr2
, comp2
);
10498 /* Makes a temporary variable expression based on the characteristics of
10499 a given variable expression. */
10502 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10504 static int serial
= 0;
10505 char name
[GFC_MAX_SYMBOL_LEN
];
10507 gfc_array_spec
*as
;
10508 gfc_array_ref
*aref
;
10511 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10512 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10513 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10519 /* Obtain the arrayspec for the temporary. */
10520 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10521 && e
->expr_type
!= EXPR_FUNCTION
10522 && e
->expr_type
!= EXPR_OP
)
10524 aref
= gfc_find_array_ref (e
);
10525 if (e
->expr_type
== EXPR_VARIABLE
10526 && e
->symtree
->n
.sym
->as
== aref
->as
)
10530 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10531 if (ref
->type
== REF_COMPONENT
10532 && ref
->u
.c
.component
->as
== aref
->as
)
10540 /* Add the attributes and the arrayspec to the temporary. */
10541 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10542 tmp
->n
.sym
->attr
.function
= 0;
10543 tmp
->n
.sym
->attr
.result
= 0;
10544 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10545 tmp
->n
.sym
->attr
.dummy
= 0;
10546 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10550 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10553 if (as
->type
== AS_DEFERRED
)
10554 tmp
->n
.sym
->attr
.allocatable
= 1;
10556 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10557 || e
->expr_type
== EXPR_FUNCTION
10558 || e
->expr_type
== EXPR_OP
))
10560 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10561 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10562 tmp
->n
.sym
->as
->rank
= e
->rank
;
10563 tmp
->n
.sym
->attr
.allocatable
= 1;
10564 tmp
->n
.sym
->attr
.dimension
= 1;
10567 tmp
->n
.sym
->attr
.dimension
= 0;
10569 gfc_set_sym_referenced (tmp
->n
.sym
);
10570 gfc_commit_symbol (tmp
->n
.sym
);
10571 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10573 /* Should the lhs be a section, use its array ref for the
10574 temporary expression. */
10575 if (aref
&& aref
->type
!= AR_FULL
)
10577 gfc_free_ref_list (e
->ref
);
10578 e
->ref
= gfc_copy_ref (ref
);
10584 /* Add one line of code to the code chain, making sure that 'head' and
10585 'tail' are appropriately updated. */
10588 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10590 gcc_assert (this_code
);
10592 *head
= *tail
= *this_code
;
10594 *tail
= gfc_append_code (*tail
, *this_code
);
10599 /* Counts the potential number of part array references that would
10600 result from resolution of typebound defined assignments. */
10603 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10606 int c_depth
= 0, t_depth
;
10608 for (c
= derived
->components
; c
; c
= c
->next
)
10610 if ((!gfc_bt_struct (c
->ts
.type
)
10612 || c
->attr
.allocatable
10613 || c
->attr
.proc_pointer_comp
10614 || c
->attr
.class_pointer
10615 || c
->attr
.proc_pointer
)
10616 && !c
->attr
.defined_assign_comp
)
10619 if (c
->as
&& c_depth
== 0)
10622 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10623 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10628 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10630 return depth
+ c_depth
;
10634 /* Implement 7.2.1.3 of the F08 standard:
10635 "An intrinsic assignment where the variable is of derived type is
10636 performed as if each component of the variable were assigned from the
10637 corresponding component of expr using pointer assignment (7.2.2) for
10638 each pointer component, defined assignment for each nonpointer
10639 nonallocatable component of a type that has a type-bound defined
10640 assignment consistent with the component, intrinsic assignment for
10641 each other nonpointer nonallocatable component, ..."
10643 The pointer assignments are taken care of by the intrinsic
10644 assignment of the structure itself. This function recursively adds
10645 defined assignments where required. The recursion is accomplished
10646 by calling gfc_resolve_code.
10648 When the lhs in a defined assignment has intent INOUT, we need a
10649 temporary for the lhs. In pseudo-code:
10651 ! Only call function lhs once.
10652 if (lhs is not a constant or an variable)
10655 ! Do the intrinsic assignment
10657 ! Now do the defined assignments
10658 do over components with typebound defined assignment [%cmp]
10659 #if one component's assignment procedure is INOUT
10661 #if expr2 non-variable
10667 t1%cmp {defined=} expr2%cmp
10673 expr1%cmp {defined=} expr2%cmp
10677 /* The temporary assignments have to be put on top of the additional
10678 code to avoid the result being changed by the intrinsic assignment.
10680 static int component_assignment_level
= 0;
10681 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10684 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10686 gfc_component
*comp1
, *comp2
;
10687 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10689 int error_count
, depth
;
10691 gfc_get_errors (NULL
, &error_count
);
10693 /* Filter out continuing processing after an error. */
10695 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10696 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10699 /* TODO: Handle more than one part array reference in assignments. */
10700 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10701 (*code
)->expr1
->rank
? 1 : 0);
10704 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10705 "done because multiple part array references would "
10706 "occur in intermediate expressions.", &(*code
)->loc
);
10710 component_assignment_level
++;
10712 /* Create a temporary so that functions get called only once. */
10713 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10714 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10716 gfc_expr
*tmp_expr
;
10718 /* Assign the rhs to the temporary. */
10719 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10720 this_code
= build_assignment (EXEC_ASSIGN
,
10721 tmp_expr
, (*code
)->expr2
,
10722 NULL
, NULL
, (*code
)->loc
);
10723 /* Add the code and substitute the rhs expression. */
10724 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10725 gfc_free_expr ((*code
)->expr2
);
10726 (*code
)->expr2
= tmp_expr
;
10729 /* Do the intrinsic assignment. This is not needed if the lhs is one
10730 of the temporaries generated here, since the intrinsic assignment
10731 to the final result already does this. */
10732 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10734 this_code
= build_assignment (EXEC_ASSIGN
,
10735 (*code
)->expr1
, (*code
)->expr2
,
10736 NULL
, NULL
, (*code
)->loc
);
10737 add_code_to_chain (&this_code
, &head
, &tail
);
10740 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10741 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10744 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10746 bool inout
= false;
10748 /* The intrinsic assignment does the right thing for pointers
10749 of all kinds and allocatable components. */
10750 if (!gfc_bt_struct (comp1
->ts
.type
)
10751 || comp1
->attr
.pointer
10752 || comp1
->attr
.allocatable
10753 || comp1
->attr
.proc_pointer_comp
10754 || comp1
->attr
.class_pointer
10755 || comp1
->attr
.proc_pointer
)
10758 /* Make an assigment for this component. */
10759 this_code
= build_assignment (EXEC_ASSIGN
,
10760 (*code
)->expr1
, (*code
)->expr2
,
10761 comp1
, comp2
, (*code
)->loc
);
10763 /* Convert the assignment if there is a defined assignment for
10764 this type. Otherwise, using the call from gfc_resolve_code,
10765 recurse into its components. */
10766 gfc_resolve_code (this_code
, ns
);
10768 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10770 gfc_formal_arglist
*dummy_args
;
10772 /* Check that there is a typebound defined assignment. If not,
10773 then this must be a module defined assignment. We cannot
10774 use the defined_assign_comp attribute here because it must
10775 be this derived type that has the defined assignment and not
10777 if (!(comp1
->ts
.u
.derived
->f2k_derived
10778 && comp1
->ts
.u
.derived
->f2k_derived
10779 ->tb_op
[INTRINSIC_ASSIGN
]))
10781 gfc_free_statements (this_code
);
10786 /* If the first argument of the subroutine has intent INOUT
10787 a temporary must be generated and used instead. */
10788 rsym
= this_code
->resolved_sym
;
10789 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10791 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10793 gfc_code
*temp_code
;
10796 /* Build the temporary required for the assignment and put
10797 it at the head of the generated code. */
10800 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10801 temp_code
= build_assignment (EXEC_ASSIGN
,
10802 t1
, (*code
)->expr1
,
10803 NULL
, NULL
, (*code
)->loc
);
10805 /* For allocatable LHS, check whether it is allocated. Note
10806 that allocatable components with defined assignment are
10807 not yet support. See PR 57696. */
10808 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10812 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10813 block
= gfc_get_code (EXEC_IF
);
10814 block
->block
= gfc_get_code (EXEC_IF
);
10815 block
->block
->expr1
10816 = gfc_build_intrinsic_call (ns
,
10817 GFC_ISYM_ALLOCATED
, "allocated",
10818 (*code
)->loc
, 1, e
);
10819 block
->block
->next
= temp_code
;
10822 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10825 /* Replace the first actual arg with the component of the
10827 gfc_free_expr (this_code
->ext
.actual
->expr
);
10828 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10829 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10831 /* If the LHS variable is allocatable and wasn't allocated and
10832 the temporary is allocatable, pointer assign the address of
10833 the freshly allocated LHS to the temporary. */
10834 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10835 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10840 cond
= gfc_get_expr ();
10841 cond
->ts
.type
= BT_LOGICAL
;
10842 cond
->ts
.kind
= gfc_default_logical_kind
;
10843 cond
->expr_type
= EXPR_OP
;
10844 cond
->where
= (*code
)->loc
;
10845 cond
->value
.op
.op
= INTRINSIC_NOT
;
10846 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10847 GFC_ISYM_ALLOCATED
, "allocated",
10848 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10849 block
= gfc_get_code (EXEC_IF
);
10850 block
->block
= gfc_get_code (EXEC_IF
);
10851 block
->block
->expr1
= cond
;
10852 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10853 t1
, (*code
)->expr1
,
10854 NULL
, NULL
, (*code
)->loc
);
10855 add_code_to_chain (&block
, &head
, &tail
);
10859 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10861 /* Don't add intrinsic assignments since they are already
10862 effected by the intrinsic assignment of the structure. */
10863 gfc_free_statements (this_code
);
10868 add_code_to_chain (&this_code
, &head
, &tail
);
10872 /* Transfer the value to the final result. */
10873 this_code
= build_assignment (EXEC_ASSIGN
,
10874 (*code
)->expr1
, t1
,
10875 comp1
, comp2
, (*code
)->loc
);
10876 add_code_to_chain (&this_code
, &head
, &tail
);
10880 /* Put the temporary assignments at the top of the generated code. */
10881 if (tmp_head
&& component_assignment_level
== 1)
10883 gfc_append_code (tmp_head
, head
);
10885 tmp_head
= tmp_tail
= NULL
;
10888 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10889 // not accidentally deallocated. Hence, nullify t1.
10890 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10891 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10897 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10898 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10899 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10900 block
= gfc_get_code (EXEC_IF
);
10901 block
->block
= gfc_get_code (EXEC_IF
);
10902 block
->block
->expr1
= cond
;
10903 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10904 t1
, gfc_get_null_expr (&(*code
)->loc
),
10905 NULL
, NULL
, (*code
)->loc
);
10906 gfc_append_code (tail
, block
);
10910 /* Now attach the remaining code chain to the input code. Step on
10911 to the end of the new code since resolution is complete. */
10912 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10913 tail
->next
= (*code
)->next
;
10914 /* Overwrite 'code' because this would place the intrinsic assignment
10915 before the temporary for the lhs is created. */
10916 gfc_free_expr ((*code
)->expr1
);
10917 gfc_free_expr ((*code
)->expr2
);
10923 component_assignment_level
--;
10927 /* F2008: Pointer function assignments are of the form:
10928 ptr_fcn (args) = expr
10929 This function breaks these assignments into two statements:
10930 temporary_pointer => ptr_fcn(args)
10931 temporary_pointer = expr */
10934 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10936 gfc_expr
*tmp_ptr_expr
;
10937 gfc_code
*this_code
;
10938 gfc_component
*comp
;
10941 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10944 /* Even if standard does not support this feature, continue to build
10945 the two statements to avoid upsetting frontend_passes.c. */
10946 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10947 "%L", &(*code
)->loc
);
10949 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10952 s
= comp
->ts
.interface
;
10954 s
= (*code
)->expr1
->symtree
->n
.sym
;
10956 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10958 gfc_error ("The function result on the lhs of the assignment at "
10959 "%L must have the pointer attribute.",
10960 &(*code
)->expr1
->where
);
10961 (*code
)->op
= EXEC_NOP
;
10965 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10967 /* get_temp_from_expression is set up for ordinary assignments. To that
10968 end, where array bounds are not known, arrays are made allocatable.
10969 Change the temporary to a pointer here. */
10970 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10971 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10972 tmp_ptr_expr
->where
= (*code
)->loc
;
10974 this_code
= build_assignment (EXEC_ASSIGN
,
10975 tmp_ptr_expr
, (*code
)->expr2
,
10976 NULL
, NULL
, (*code
)->loc
);
10977 this_code
->next
= (*code
)->next
;
10978 (*code
)->next
= this_code
;
10979 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10980 (*code
)->expr2
= (*code
)->expr1
;
10981 (*code
)->expr1
= tmp_ptr_expr
;
10987 /* Deferred character length assignments from an operator expression
10988 require a temporary because the character length of the lhs can
10989 change in the course of the assignment. */
10992 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10994 gfc_expr
*tmp_expr
;
10995 gfc_code
*this_code
;
10997 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10998 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10999 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11002 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11005 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11006 tmp_expr
->where
= (*code
)->loc
;
11008 /* A new charlen is required to ensure that the variable string
11009 length is different to that of the original lhs. */
11010 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11011 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11012 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11013 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11015 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11017 this_code
= build_assignment (EXEC_ASSIGN
,
11019 gfc_copy_expr (tmp_expr
),
11020 NULL
, NULL
, (*code
)->loc
);
11022 (*code
)->expr1
= tmp_expr
;
11024 this_code
->next
= (*code
)->next
;
11025 (*code
)->next
= this_code
;
11031 /* Given a block of code, recursively resolve everything pointed to by this
11035 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11037 int omp_workshare_save
;
11038 int forall_save
, do_concurrent_save
;
11042 frame
.prev
= cs_base
;
11046 find_reachable_labels (code
);
11048 for (; code
; code
= code
->next
)
11050 frame
.current
= code
;
11051 forall_save
= forall_flag
;
11052 do_concurrent_save
= gfc_do_concurrent_flag
;
11054 if (code
->op
== EXEC_FORALL
)
11057 gfc_resolve_forall (code
, ns
, forall_save
);
11060 else if (code
->block
)
11062 omp_workshare_save
= -1;
11065 case EXEC_OACC_PARALLEL_LOOP
:
11066 case EXEC_OACC_PARALLEL
:
11067 case EXEC_OACC_KERNELS_LOOP
:
11068 case EXEC_OACC_KERNELS
:
11069 case EXEC_OACC_DATA
:
11070 case EXEC_OACC_HOST_DATA
:
11071 case EXEC_OACC_LOOP
:
11072 gfc_resolve_oacc_blocks (code
, ns
);
11074 case EXEC_OMP_PARALLEL_WORKSHARE
:
11075 omp_workshare_save
= omp_workshare_flag
;
11076 omp_workshare_flag
= 1;
11077 gfc_resolve_omp_parallel_blocks (code
, ns
);
11079 case EXEC_OMP_PARALLEL
:
11080 case EXEC_OMP_PARALLEL_DO
:
11081 case EXEC_OMP_PARALLEL_DO_SIMD
:
11082 case EXEC_OMP_PARALLEL_SECTIONS
:
11083 case EXEC_OMP_TARGET_PARALLEL
:
11084 case EXEC_OMP_TARGET_PARALLEL_DO
:
11085 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11086 case EXEC_OMP_TARGET_TEAMS
:
11087 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11088 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11089 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11090 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11091 case EXEC_OMP_TASK
:
11092 case EXEC_OMP_TASKLOOP
:
11093 case EXEC_OMP_TASKLOOP_SIMD
:
11094 case EXEC_OMP_TEAMS
:
11095 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11096 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11097 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11098 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11099 omp_workshare_save
= omp_workshare_flag
;
11100 omp_workshare_flag
= 0;
11101 gfc_resolve_omp_parallel_blocks (code
, ns
);
11103 case EXEC_OMP_DISTRIBUTE
:
11104 case EXEC_OMP_DISTRIBUTE_SIMD
:
11106 case EXEC_OMP_DO_SIMD
:
11107 case EXEC_OMP_SIMD
:
11108 case EXEC_OMP_TARGET_SIMD
:
11109 gfc_resolve_omp_do_blocks (code
, ns
);
11111 case EXEC_SELECT_TYPE
:
11112 /* Blocks are handled in resolve_select_type because we have
11113 to transform the SELECT TYPE into ASSOCIATE first. */
11115 case EXEC_DO_CONCURRENT
:
11116 gfc_do_concurrent_flag
= 1;
11117 gfc_resolve_blocks (code
->block
, ns
);
11118 gfc_do_concurrent_flag
= 2;
11120 case EXEC_OMP_WORKSHARE
:
11121 omp_workshare_save
= omp_workshare_flag
;
11122 omp_workshare_flag
= 1;
11125 gfc_resolve_blocks (code
->block
, ns
);
11129 if (omp_workshare_save
!= -1)
11130 omp_workshare_flag
= omp_workshare_save
;
11134 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11135 t
= gfc_resolve_expr (code
->expr1
);
11136 forall_flag
= forall_save
;
11137 gfc_do_concurrent_flag
= do_concurrent_save
;
11139 if (!gfc_resolve_expr (code
->expr2
))
11142 if (code
->op
== EXEC_ALLOCATE
11143 && !gfc_resolve_expr (code
->expr3
))
11149 case EXEC_END_BLOCK
:
11150 case EXEC_END_NESTED_BLOCK
:
11154 case EXEC_ERROR_STOP
:
11156 case EXEC_CONTINUE
:
11158 case EXEC_ASSIGN_CALL
:
11161 case EXEC_CRITICAL
:
11162 resolve_critical (code
);
11165 case EXEC_SYNC_ALL
:
11166 case EXEC_SYNC_IMAGES
:
11167 case EXEC_SYNC_MEMORY
:
11168 resolve_sync (code
);
11173 case EXEC_EVENT_POST
:
11174 case EXEC_EVENT_WAIT
:
11175 resolve_lock_unlock_event (code
);
11178 case EXEC_FAIL_IMAGE
:
11179 case EXEC_FORM_TEAM
:
11180 case EXEC_CHANGE_TEAM
:
11181 case EXEC_END_TEAM
:
11182 case EXEC_SYNC_TEAM
:
11186 /* Keep track of which entry we are up to. */
11187 current_entry_id
= code
->ext
.entry
->id
;
11191 resolve_where (code
, NULL
);
11195 if (code
->expr1
!= NULL
)
11197 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11198 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11199 "INTEGER variable", &code
->expr1
->where
);
11200 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11201 gfc_error ("Variable %qs has not been assigned a target "
11202 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11203 &code
->expr1
->where
);
11206 resolve_branch (code
->label1
, code
);
11210 if (code
->expr1
!= NULL
11211 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11212 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11213 "INTEGER return specifier", &code
->expr1
->where
);
11216 case EXEC_INIT_ASSIGN
:
11217 case EXEC_END_PROCEDURE
:
11224 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11226 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11227 && code
->expr1
->value
.function
.isym
11228 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11229 remove_caf_get_intrinsic (code
->expr1
);
11231 /* If this is a pointer function in an lvalue variable context,
11232 the new code will have to be resolved afresh. This is also the
11233 case with an error, where the code is transformed into NOP to
11234 prevent ICEs downstream. */
11235 if (resolve_ptr_fcn_assign (&code
, ns
)
11236 || code
->op
== EXEC_NOP
)
11239 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11243 if (resolve_ordinary_assign (code
, ns
))
11245 if (code
->op
== EXEC_COMPCALL
)
11251 /* Check for dependencies in deferred character length array
11252 assignments and generate a temporary, if necessary. */
11253 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11256 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11257 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11258 && code
->expr1
->ts
.u
.derived
11259 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11260 generate_component_assignments (&code
, ns
);
11264 case EXEC_LABEL_ASSIGN
:
11265 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11266 gfc_error ("Label %d referenced at %L is never defined",
11267 code
->label1
->value
, &code
->label1
->where
);
11269 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11270 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11271 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11272 != gfc_default_integer_kind
11273 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11274 gfc_error ("ASSIGN statement at %L requires a scalar "
11275 "default INTEGER variable", &code
->expr1
->where
);
11278 case EXEC_POINTER_ASSIGN
:
11285 /* This is both a variable definition and pointer assignment
11286 context, so check both of them. For rank remapping, a final
11287 array ref may be present on the LHS and fool gfc_expr_attr
11288 used in gfc_check_vardef_context. Remove it. */
11289 e
= remove_last_array_ref (code
->expr1
);
11290 t
= gfc_check_vardef_context (e
, true, false, false,
11291 _("pointer assignment"));
11293 t
= gfc_check_vardef_context (e
, false, false, false,
11294 _("pointer assignment"));
11299 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11301 /* Assigning a class object always is a regular assign. */
11302 if (code
->expr2
->ts
.type
== BT_CLASS
11303 && code
->expr1
->ts
.type
== BT_CLASS
11304 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11305 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11306 && code
->expr2
->expr_type
== EXPR_VARIABLE
11307 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11309 code
->op
= EXEC_ASSIGN
;
11313 case EXEC_ARITHMETIC_IF
:
11315 gfc_expr
*e
= code
->expr1
;
11317 gfc_resolve_expr (e
);
11318 if (e
->expr_type
== EXPR_NULL
)
11319 gfc_error ("Invalid NULL at %L", &e
->where
);
11321 if (t
&& (e
->rank
> 0
11322 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11323 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11324 "REAL or INTEGER expression", &e
->where
);
11326 resolve_branch (code
->label1
, code
);
11327 resolve_branch (code
->label2
, code
);
11328 resolve_branch (code
->label3
, code
);
11333 if (t
&& code
->expr1
!= NULL
11334 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11335 || code
->expr1
->rank
!= 0))
11336 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11337 &code
->expr1
->where
);
11342 resolve_call (code
);
11345 case EXEC_COMPCALL
:
11347 resolve_typebound_subroutine (code
);
11350 case EXEC_CALL_PPC
:
11351 resolve_ppc_call (code
);
11355 /* Select is complicated. Also, a SELECT construct could be
11356 a transformed computed GOTO. */
11357 resolve_select (code
, false);
11360 case EXEC_SELECT_TYPE
:
11361 resolve_select_type (code
, ns
);
11365 resolve_block_construct (code
);
11369 if (code
->ext
.iterator
!= NULL
)
11371 gfc_iterator
*iter
= code
->ext
.iterator
;
11372 if (gfc_resolve_iterator (iter
, true, false))
11373 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11378 case EXEC_DO_WHILE
:
11379 if (code
->expr1
== NULL
)
11380 gfc_internal_error ("gfc_resolve_code(): No expression on "
11383 && (code
->expr1
->rank
!= 0
11384 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11385 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11386 "a scalar LOGICAL expression", &code
->expr1
->where
);
11389 case EXEC_ALLOCATE
:
11391 resolve_allocate_deallocate (code
, "ALLOCATE");
11395 case EXEC_DEALLOCATE
:
11397 resolve_allocate_deallocate (code
, "DEALLOCATE");
11402 if (!gfc_resolve_open (code
->ext
.open
))
11405 resolve_branch (code
->ext
.open
->err
, code
);
11409 if (!gfc_resolve_close (code
->ext
.close
))
11412 resolve_branch (code
->ext
.close
->err
, code
);
11415 case EXEC_BACKSPACE
:
11419 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11422 resolve_branch (code
->ext
.filepos
->err
, code
);
11426 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11429 resolve_branch (code
->ext
.inquire
->err
, code
);
11432 case EXEC_IOLENGTH
:
11433 gcc_assert (code
->ext
.inquire
!= NULL
);
11434 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11437 resolve_branch (code
->ext
.inquire
->err
, code
);
11441 if (!gfc_resolve_wait (code
->ext
.wait
))
11444 resolve_branch (code
->ext
.wait
->err
, code
);
11445 resolve_branch (code
->ext
.wait
->end
, code
);
11446 resolve_branch (code
->ext
.wait
->eor
, code
);
11451 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11454 resolve_branch (code
->ext
.dt
->err
, code
);
11455 resolve_branch (code
->ext
.dt
->end
, code
);
11456 resolve_branch (code
->ext
.dt
->eor
, code
);
11459 case EXEC_TRANSFER
:
11460 resolve_transfer (code
);
11463 case EXEC_DO_CONCURRENT
:
11465 resolve_forall_iterators (code
->ext
.forall_iterator
);
11467 if (code
->expr1
!= NULL
11468 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11469 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11470 "expression", &code
->expr1
->where
);
11473 case EXEC_OACC_PARALLEL_LOOP
:
11474 case EXEC_OACC_PARALLEL
:
11475 case EXEC_OACC_KERNELS_LOOP
:
11476 case EXEC_OACC_KERNELS
:
11477 case EXEC_OACC_DATA
:
11478 case EXEC_OACC_HOST_DATA
:
11479 case EXEC_OACC_LOOP
:
11480 case EXEC_OACC_UPDATE
:
11481 case EXEC_OACC_WAIT
:
11482 case EXEC_OACC_CACHE
:
11483 case EXEC_OACC_ENTER_DATA
:
11484 case EXEC_OACC_EXIT_DATA
:
11485 case EXEC_OACC_ATOMIC
:
11486 case EXEC_OACC_DECLARE
:
11487 gfc_resolve_oacc_directive (code
, ns
);
11490 case EXEC_OMP_ATOMIC
:
11491 case EXEC_OMP_BARRIER
:
11492 case EXEC_OMP_CANCEL
:
11493 case EXEC_OMP_CANCELLATION_POINT
:
11494 case EXEC_OMP_CRITICAL
:
11495 case EXEC_OMP_FLUSH
:
11496 case EXEC_OMP_DISTRIBUTE
:
11497 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11498 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11499 case EXEC_OMP_DISTRIBUTE_SIMD
:
11501 case EXEC_OMP_DO_SIMD
:
11502 case EXEC_OMP_MASTER
:
11503 case EXEC_OMP_ORDERED
:
11504 case EXEC_OMP_SECTIONS
:
11505 case EXEC_OMP_SIMD
:
11506 case EXEC_OMP_SINGLE
:
11507 case EXEC_OMP_TARGET
:
11508 case EXEC_OMP_TARGET_DATA
:
11509 case EXEC_OMP_TARGET_ENTER_DATA
:
11510 case EXEC_OMP_TARGET_EXIT_DATA
:
11511 case EXEC_OMP_TARGET_PARALLEL
:
11512 case EXEC_OMP_TARGET_PARALLEL_DO
:
11513 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11514 case EXEC_OMP_TARGET_SIMD
:
11515 case EXEC_OMP_TARGET_TEAMS
:
11516 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11517 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11518 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11519 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11520 case EXEC_OMP_TARGET_UPDATE
:
11521 case EXEC_OMP_TASK
:
11522 case EXEC_OMP_TASKGROUP
:
11523 case EXEC_OMP_TASKLOOP
:
11524 case EXEC_OMP_TASKLOOP_SIMD
:
11525 case EXEC_OMP_TASKWAIT
:
11526 case EXEC_OMP_TASKYIELD
:
11527 case EXEC_OMP_TEAMS
:
11528 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11529 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11530 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11531 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11532 case EXEC_OMP_WORKSHARE
:
11533 gfc_resolve_omp_directive (code
, ns
);
11536 case EXEC_OMP_PARALLEL
:
11537 case EXEC_OMP_PARALLEL_DO
:
11538 case EXEC_OMP_PARALLEL_DO_SIMD
:
11539 case EXEC_OMP_PARALLEL_SECTIONS
:
11540 case EXEC_OMP_PARALLEL_WORKSHARE
:
11541 omp_workshare_save
= omp_workshare_flag
;
11542 omp_workshare_flag
= 0;
11543 gfc_resolve_omp_directive (code
, ns
);
11544 omp_workshare_flag
= omp_workshare_save
;
11548 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11552 cs_base
= frame
.prev
;
11556 /* Resolve initial values and make sure they are compatible with
11560 resolve_values (gfc_symbol
*sym
)
11564 if (sym
->value
== NULL
)
11567 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11568 t
= resolve_structure_cons (sym
->value
, 1);
11570 t
= gfc_resolve_expr (sym
->value
);
11575 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11579 /* Verify any BIND(C) derived types in the namespace so we can report errors
11580 for them once, rather than for each variable declared of that type. */
11583 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11585 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11586 && derived_sym
->attr
.is_bind_c
== 1)
11587 verify_bind_c_derived_type (derived_sym
);
11593 /* Check the interfaces of DTIO procedures associated with derived
11594 type 'sym'. These procedures can either have typebound bindings or
11595 can appear in DTIO generic interfaces. */
11598 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11600 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11603 gfc_check_dtio_interfaces (sym
);
11608 /* Verify that any binding labels used in a given namespace do not collide
11609 with the names or binding labels of any global symbols. Multiple INTERFACE
11610 for the same procedure are permitted. */
11613 gfc_verify_binding_labels (gfc_symbol
*sym
)
11616 const char *module
;
11618 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11619 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11622 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11625 module
= sym
->module
;
11626 else if (sym
->ns
&& sym
->ns
->proc_name
11627 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11628 module
= sym
->ns
->proc_name
->name
;
11629 else if (sym
->ns
&& sym
->ns
->parent
11630 && sym
->ns
&& sym
->ns
->parent
->proc_name
11631 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11632 module
= sym
->ns
->parent
->proc_name
->name
;
11638 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11641 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11642 gsym
->where
= sym
->declared_at
;
11643 gsym
->sym_name
= sym
->name
;
11644 gsym
->binding_label
= sym
->binding_label
;
11645 gsym
->ns
= sym
->ns
;
11646 gsym
->mod_name
= module
;
11647 if (sym
->attr
.function
)
11648 gsym
->type
= GSYM_FUNCTION
;
11649 else if (sym
->attr
.subroutine
)
11650 gsym
->type
= GSYM_SUBROUTINE
;
11651 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11652 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11656 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11658 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11659 "identifier as entity at %L", sym
->name
,
11660 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11661 /* Clear the binding label to prevent checking multiple times. */
11662 sym
->binding_label
= NULL
;
11665 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11666 && (strcmp (module
, gsym
->mod_name
) != 0
11667 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11669 /* This can only happen if the variable is defined in a module - if it
11670 isn't the same module, reject it. */
11671 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11672 "uses the same global identifier as entity at %L from module %qs",
11673 sym
->name
, module
, sym
->binding_label
,
11674 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11675 sym
->binding_label
= NULL
;
11677 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11678 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11679 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11680 && sym
!= gsym
->ns
->proc_name
11681 && (module
!= gsym
->mod_name
11682 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11683 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11685 /* Print an error if the procedure is defined multiple times; we have to
11686 exclude references to the same procedure via module association or
11687 multiple checks for the same procedure. */
11688 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11689 "global identifier as entity at %L", sym
->name
,
11690 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11691 sym
->binding_label
= NULL
;
11696 /* Resolve an index expression. */
11699 resolve_index_expr (gfc_expr
*e
)
11701 if (!gfc_resolve_expr (e
))
11704 if (!gfc_simplify_expr (e
, 0))
11707 if (!gfc_specification_expr (e
))
11714 /* Resolve a charlen structure. */
11717 resolve_charlen (gfc_charlen
*cl
)
11720 bool saved_specification_expr
;
11726 saved_specification_expr
= specification_expr
;
11727 specification_expr
= true;
11729 if (cl
->length_from_typespec
)
11731 if (!gfc_resolve_expr (cl
->length
))
11733 specification_expr
= saved_specification_expr
;
11737 if (!gfc_simplify_expr (cl
->length
, 0))
11739 specification_expr
= saved_specification_expr
;
11743 /* cl->length has been resolved. It should have an integer type. */
11744 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11746 gfc_error ("Scalar INTEGER expression expected at %L",
11747 &cl
->length
->where
);
11753 if (!resolve_index_expr (cl
->length
))
11755 specification_expr
= saved_specification_expr
;
11760 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11761 a negative value, the length of character entities declared is zero. */
11762 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11763 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11764 gfc_replace_expr (cl
->length
,
11765 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11767 /* Check that the character length is not too large. */
11768 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11769 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11770 && cl
->length
->ts
.type
== BT_INTEGER
11771 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11773 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11774 specification_expr
= saved_specification_expr
;
11778 specification_expr
= saved_specification_expr
;
11783 /* Test for non-constant shape arrays. */
11786 is_non_constant_shape_array (gfc_symbol
*sym
)
11792 not_constant
= false;
11793 if (sym
->as
!= NULL
)
11795 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11796 has not been simplified; parameter array references. Do the
11797 simplification now. */
11798 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11800 e
= sym
->as
->lower
[i
];
11801 if (e
&& (!resolve_index_expr(e
)
11802 || !gfc_is_constant_expr (e
)))
11803 not_constant
= true;
11804 e
= sym
->as
->upper
[i
];
11805 if (e
&& (!resolve_index_expr(e
)
11806 || !gfc_is_constant_expr (e
)))
11807 not_constant
= true;
11810 return not_constant
;
11813 /* Given a symbol and an initialization expression, add code to initialize
11814 the symbol to the function entry. */
11816 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11820 gfc_namespace
*ns
= sym
->ns
;
11822 /* Search for the function namespace if this is a contained
11823 function without an explicit result. */
11824 if (sym
->attr
.function
&& sym
== sym
->result
11825 && sym
->name
!= sym
->ns
->proc_name
->name
)
11827 ns
= ns
->contained
;
11828 for (;ns
; ns
= ns
->sibling
)
11829 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11835 gfc_free_expr (init
);
11839 /* Build an l-value expression for the result. */
11840 lval
= gfc_lval_expr_from_sym (sym
);
11842 /* Add the code at scope entry. */
11843 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11844 init_st
->next
= ns
->code
;
11845 ns
->code
= init_st
;
11847 /* Assign the default initializer to the l-value. */
11848 init_st
->loc
= sym
->declared_at
;
11849 init_st
->expr1
= lval
;
11850 init_st
->expr2
= init
;
11854 /* Whether or not we can generate a default initializer for a symbol. */
11857 can_generate_init (gfc_symbol
*sym
)
11859 symbol_attribute
*a
;
11864 /* These symbols should never have a default initialization. */
11869 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11870 && (CLASS_DATA (sym
)->attr
.class_pointer
11871 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11872 || a
->in_equivalence
11879 || (!a
->referenced
&& !a
->result
)
11880 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11881 || (a
->function
&& sym
!= sym
->result
)
11886 /* Assign the default initializer to a derived type variable or result. */
11889 apply_default_init (gfc_symbol
*sym
)
11891 gfc_expr
*init
= NULL
;
11893 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11896 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11897 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11899 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11902 build_init_assign (sym
, init
);
11903 sym
->attr
.referenced
= 1;
11907 /* Build an initializer for a local. Returns null if the symbol should not have
11908 a default initialization. */
11911 build_default_init_expr (gfc_symbol
*sym
)
11913 /* These symbols should never have a default initialization. */
11914 if (sym
->attr
.allocatable
11915 || sym
->attr
.external
11917 || sym
->attr
.pointer
11918 || sym
->attr
.in_equivalence
11919 || sym
->attr
.in_common
11922 || sym
->attr
.cray_pointee
11923 || sym
->attr
.cray_pointer
11927 /* Get the appropriate init expression. */
11928 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11931 /* Add an initialization expression to a local variable. */
11933 apply_default_init_local (gfc_symbol
*sym
)
11935 gfc_expr
*init
= NULL
;
11937 /* The symbol should be a variable or a function return value. */
11938 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11939 || (sym
->attr
.function
&& sym
->result
!= sym
))
11942 /* Try to build the initializer expression. If we can't initialize
11943 this symbol, then init will be NULL. */
11944 init
= build_default_init_expr (sym
);
11948 /* For saved variables, we don't want to add an initializer at function
11949 entry, so we just add a static initializer. Note that automatic variables
11950 are stack allocated even with -fno-automatic; we have also to exclude
11951 result variable, which are also nonstatic. */
11952 if (!sym
->attr
.automatic
11953 && (sym
->attr
.save
|| sym
->ns
->save_all
11954 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11955 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11956 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11958 /* Don't clobber an existing initializer! */
11959 gcc_assert (sym
->value
== NULL
);
11964 build_init_assign (sym
, init
);
11968 /* Resolution of common features of flavors variable and procedure. */
11971 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11973 gfc_array_spec
*as
;
11975 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11976 as
= CLASS_DATA (sym
)->as
;
11980 /* Constraints on deferred shape variable. */
11981 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11983 bool pointer
, allocatable
, dimension
;
11985 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11987 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11988 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11989 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11993 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11994 allocatable
= sym
->attr
.allocatable
;
11995 dimension
= sym
->attr
.dimension
;
12000 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12002 gfc_error ("Allocatable array %qs at %L must have a deferred "
12003 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12006 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12007 "%qs at %L may not be ALLOCATABLE",
12008 sym
->name
, &sym
->declared_at
))
12012 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12014 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12015 "assumed rank", sym
->name
, &sym
->declared_at
);
12021 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12022 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12024 gfc_error ("Array %qs at %L cannot have a deferred shape",
12025 sym
->name
, &sym
->declared_at
);
12030 /* Constraints on polymorphic variables. */
12031 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12034 if (sym
->attr
.class_ok
12035 && !sym
->attr
.select_type_temporary
12036 && !UNLIMITED_POLY (sym
)
12037 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12039 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12040 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12041 &sym
->declared_at
);
12046 /* Assume that use associated symbols were checked in the module ns.
12047 Class-variables that are associate-names are also something special
12048 and excepted from the test. */
12049 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12051 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12052 "or pointer", sym
->name
, &sym
->declared_at
);
12061 /* Additional checks for symbols with flavor variable and derived
12062 type. To be called from resolve_fl_variable. */
12065 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12067 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12069 /* Check to see if a derived type is blocked from being host
12070 associated by the presence of another class I symbol in the same
12071 namespace. 14.6.1.3 of the standard and the discussion on
12072 comp.lang.fortran. */
12073 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12074 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12077 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12078 if (s
&& s
->attr
.generic
)
12079 s
= gfc_find_dt_in_generic (s
);
12080 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12082 gfc_error ("The type %qs cannot be host associated at %L "
12083 "because it is blocked by an incompatible object "
12084 "of the same name declared at %L",
12085 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12091 /* 4th constraint in section 11.3: "If an object of a type for which
12092 component-initialization is specified (R429) appears in the
12093 specification-part of a module and does not have the ALLOCATABLE
12094 or POINTER attribute, the object shall have the SAVE attribute."
12096 The check for initializers is performed with
12097 gfc_has_default_initializer because gfc_default_initializer generates
12098 a hidden default for allocatable components. */
12099 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12100 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12101 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12102 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12103 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12104 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12105 "%qs at %L, needed due to the default "
12106 "initialization", sym
->name
, &sym
->declared_at
))
12109 /* Assign default initializer. */
12110 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12111 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12112 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12118 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12119 except in the declaration of an entity or component that has the POINTER
12120 or ALLOCATABLE attribute. */
12123 deferred_requirements (gfc_symbol
*sym
)
12125 if (sym
->ts
.deferred
12126 && !(sym
->attr
.pointer
12127 || sym
->attr
.allocatable
12128 || sym
->attr
.associate_var
12129 || sym
->attr
.omp_udr_artificial_var
))
12131 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12132 "requires either the POINTER or ALLOCATABLE attribute",
12133 sym
->name
, &sym
->declared_at
);
12140 /* Resolve symbols with flavor variable. */
12143 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12145 int no_init_flag
, automatic_flag
;
12147 const char *auto_save_msg
;
12148 bool saved_specification_expr
;
12150 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12153 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12156 /* Set this flag to check that variables are parameters of all entries.
12157 This check is effected by the call to gfc_resolve_expr through
12158 is_non_constant_shape_array. */
12159 saved_specification_expr
= specification_expr
;
12160 specification_expr
= true;
12162 if (sym
->ns
->proc_name
12163 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12164 || sym
->ns
->proc_name
->attr
.is_main_program
)
12165 && !sym
->attr
.use_assoc
12166 && !sym
->attr
.allocatable
12167 && !sym
->attr
.pointer
12168 && is_non_constant_shape_array (sym
))
12170 /* F08:C541. The shape of an array defined in a main program or module
12171 * needs to be constant. */
12172 gfc_error ("The module or main program array %qs at %L must "
12173 "have constant shape", sym
->name
, &sym
->declared_at
);
12174 specification_expr
= saved_specification_expr
;
12178 /* Constraints on deferred type parameter. */
12179 if (!deferred_requirements (sym
))
12182 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12184 /* Make sure that character string variables with assumed length are
12185 dummy arguments. */
12186 e
= sym
->ts
.u
.cl
->length
;
12187 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12188 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12189 && !sym
->attr
.omp_udr_artificial_var
)
12191 gfc_error ("Entity with assumed character length at %L must be a "
12192 "dummy argument or a PARAMETER", &sym
->declared_at
);
12193 specification_expr
= saved_specification_expr
;
12197 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12199 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12200 specification_expr
= saved_specification_expr
;
12204 if (!gfc_is_constant_expr (e
)
12205 && !(e
->expr_type
== EXPR_VARIABLE
12206 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12208 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12209 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12210 || sym
->ns
->proc_name
->attr
.is_main_program
))
12212 gfc_error ("%qs at %L must have constant character length "
12213 "in this context", sym
->name
, &sym
->declared_at
);
12214 specification_expr
= saved_specification_expr
;
12217 if (sym
->attr
.in_common
)
12219 gfc_error ("COMMON variable %qs at %L must have constant "
12220 "character length", sym
->name
, &sym
->declared_at
);
12221 specification_expr
= saved_specification_expr
;
12227 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12228 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12230 /* Determine if the symbol may not have an initializer. */
12231 no_init_flag
= automatic_flag
= 0;
12232 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12233 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12235 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12236 && is_non_constant_shape_array (sym
))
12238 no_init_flag
= automatic_flag
= 1;
12240 /* Also, they must not have the SAVE attribute.
12241 SAVE_IMPLICIT is checked below. */
12242 if (sym
->as
&& sym
->attr
.codimension
)
12244 int corank
= sym
->as
->corank
;
12245 sym
->as
->corank
= 0;
12246 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12247 sym
->as
->corank
= corank
;
12249 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12251 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12252 specification_expr
= saved_specification_expr
;
12257 /* Ensure that any initializer is simplified. */
12259 gfc_simplify_expr (sym
->value
, 1);
12261 /* Reject illegal initializers. */
12262 if (!sym
->mark
&& sym
->value
)
12264 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12265 && CLASS_DATA (sym
)->attr
.allocatable
))
12266 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12267 sym
->name
, &sym
->declared_at
);
12268 else if (sym
->attr
.external
)
12269 gfc_error ("External %qs at %L cannot have an initializer",
12270 sym
->name
, &sym
->declared_at
);
12271 else if (sym
->attr
.dummy
12272 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12273 gfc_error ("Dummy %qs at %L cannot have an initializer",
12274 sym
->name
, &sym
->declared_at
);
12275 else if (sym
->attr
.intrinsic
)
12276 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12277 sym
->name
, &sym
->declared_at
);
12278 else if (sym
->attr
.result
)
12279 gfc_error ("Function result %qs at %L cannot have an initializer",
12280 sym
->name
, &sym
->declared_at
);
12281 else if (automatic_flag
)
12282 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12283 sym
->name
, &sym
->declared_at
);
12285 goto no_init_error
;
12286 specification_expr
= saved_specification_expr
;
12291 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12293 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12294 specification_expr
= saved_specification_expr
;
12298 specification_expr
= saved_specification_expr
;
12303 /* Compare the dummy characteristics of a module procedure interface
12304 declaration with the corresponding declaration in a submodule. */
12305 static gfc_formal_arglist
*new_formal
;
12306 static char errmsg
[200];
12309 compare_fsyms (gfc_symbol
*sym
)
12313 if (sym
== NULL
|| new_formal
== NULL
)
12316 fsym
= new_formal
->sym
;
12321 if (strcmp (sym
->name
, fsym
->name
) == 0)
12323 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12324 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12329 /* Resolve a procedure. */
12332 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12334 gfc_formal_arglist
*arg
;
12336 if (sym
->attr
.function
12337 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12340 if (sym
->ts
.type
== BT_CHARACTER
)
12342 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12344 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12345 && !resolve_charlen (cl
))
12348 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12349 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12351 gfc_error ("Character-valued statement function %qs at %L must "
12352 "have constant length", sym
->name
, &sym
->declared_at
);
12357 /* Ensure that derived type for are not of a private type. Internal
12358 module procedures are excluded by 2.2.3.3 - i.e., they are not
12359 externally accessible and can access all the objects accessible in
12361 if (!(sym
->ns
->parent
12362 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12363 && gfc_check_symbol_access (sym
))
12365 gfc_interface
*iface
;
12367 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12370 && arg
->sym
->ts
.type
== BT_DERIVED
12371 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12372 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12373 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12374 "and cannot be a dummy argument"
12375 " of %qs, which is PUBLIC at %L",
12376 arg
->sym
->name
, sym
->name
,
12377 &sym
->declared_at
))
12379 /* Stop this message from recurring. */
12380 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12385 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12386 PRIVATE to the containing module. */
12387 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12389 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12392 && arg
->sym
->ts
.type
== BT_DERIVED
12393 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12394 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12395 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12396 "PUBLIC interface %qs at %L "
12397 "takes dummy arguments of %qs which "
12398 "is PRIVATE", iface
->sym
->name
,
12399 sym
->name
, &iface
->sym
->declared_at
,
12400 gfc_typename(&arg
->sym
->ts
)))
12402 /* Stop this message from recurring. */
12403 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12410 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12411 && !sym
->attr
.proc_pointer
)
12413 gfc_error ("Function %qs at %L cannot have an initializer",
12414 sym
->name
, &sym
->declared_at
);
12418 /* An external symbol may not have an initializer because it is taken to be
12419 a procedure. Exception: Procedure Pointers. */
12420 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12422 gfc_error ("External object %qs at %L may not have an initializer",
12423 sym
->name
, &sym
->declared_at
);
12427 /* An elemental function is required to return a scalar 12.7.1 */
12428 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12430 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12431 "result", sym
->name
, &sym
->declared_at
);
12432 /* Reset so that the error only occurs once. */
12433 sym
->attr
.elemental
= 0;
12437 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12438 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12440 gfc_error ("Statement function %qs at %L may not have pointer or "
12441 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12445 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12446 char-len-param shall not be array-valued, pointer-valued, recursive
12447 or pure. ....snip... A character value of * may only be used in the
12448 following ways: (i) Dummy arg of procedure - dummy associates with
12449 actual length; (ii) To declare a named constant; or (iii) External
12450 function - but length must be declared in calling scoping unit. */
12451 if (sym
->attr
.function
12452 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12453 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12455 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12456 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12458 if (sym
->as
&& sym
->as
->rank
)
12459 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12460 "array-valued", sym
->name
, &sym
->declared_at
);
12462 if (sym
->attr
.pointer
)
12463 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12464 "pointer-valued", sym
->name
, &sym
->declared_at
);
12466 if (sym
->attr
.pure
)
12467 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12468 "pure", sym
->name
, &sym
->declared_at
);
12470 if (sym
->attr
.recursive
)
12471 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12472 "recursive", sym
->name
, &sym
->declared_at
);
12477 /* Appendix B.2 of the standard. Contained functions give an
12478 error anyway. Deferred character length is an F2003 feature.
12479 Don't warn on intrinsic conversion functions, which start
12480 with two underscores. */
12481 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12482 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12483 gfc_notify_std (GFC_STD_F95_OBS
,
12484 "CHARACTER(*) function %qs at %L",
12485 sym
->name
, &sym
->declared_at
);
12488 /* F2008, C1218. */
12489 if (sym
->attr
.elemental
)
12491 if (sym
->attr
.proc_pointer
)
12493 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12494 sym
->name
, &sym
->declared_at
);
12497 if (sym
->attr
.dummy
)
12499 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12500 sym
->name
, &sym
->declared_at
);
12505 /* F2018, C15100: "The result of an elemental function shall be scalar,
12506 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12507 pointer is tested and caught elsewhere. */
12508 if (sym
->attr
.elemental
&& sym
->result
12509 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12511 gfc_error ("Function result variable %qs at %L of elemental "
12512 "function %qs shall not have an ALLOCATABLE or POINTER "
12513 "attribute", sym
->result
->name
,
12514 &sym
->result
->declared_at
, sym
->name
);
12518 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12520 gfc_formal_arglist
*curr_arg
;
12521 int has_non_interop_arg
= 0;
12523 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12524 sym
->common_block
))
12526 /* Clear these to prevent looking at them again if there was an
12528 sym
->attr
.is_bind_c
= 0;
12529 sym
->attr
.is_c_interop
= 0;
12530 sym
->ts
.is_c_interop
= 0;
12534 /* So far, no errors have been found. */
12535 sym
->attr
.is_c_interop
= 1;
12536 sym
->ts
.is_c_interop
= 1;
12539 curr_arg
= gfc_sym_get_dummy_args (sym
);
12540 while (curr_arg
!= NULL
)
12542 /* Skip implicitly typed dummy args here. */
12543 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12544 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12545 /* If something is found to fail, record the fact so we
12546 can mark the symbol for the procedure as not being
12547 BIND(C) to try and prevent multiple errors being
12549 has_non_interop_arg
= 1;
12551 curr_arg
= curr_arg
->next
;
12554 /* See if any of the arguments were not interoperable and if so, clear
12555 the procedure symbol to prevent duplicate error messages. */
12556 if (has_non_interop_arg
!= 0)
12558 sym
->attr
.is_c_interop
= 0;
12559 sym
->ts
.is_c_interop
= 0;
12560 sym
->attr
.is_bind_c
= 0;
12564 if (!sym
->attr
.proc_pointer
)
12566 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12568 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12569 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12572 if (sym
->attr
.intent
)
12574 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12575 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12578 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12580 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12581 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12584 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12585 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12586 || sym
->attr
.contained
))
12588 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12589 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12592 if (strcmp ("ppr@", sym
->name
) == 0)
12594 gfc_error ("Procedure pointer result %qs at %L "
12595 "is missing the pointer attribute",
12596 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12601 /* Assume that a procedure whose body is not known has references
12602 to external arrays. */
12603 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12604 sym
->attr
.array_outer_dependency
= 1;
12606 /* Compare the characteristics of a module procedure with the
12607 interface declaration. Ideally this would be done with
12608 gfc_compare_interfaces but, at present, the formal interface
12609 cannot be copied to the ts.interface. */
12610 if (sym
->attr
.module_procedure
12611 && sym
->attr
.if_source
== IFSRC_DECL
)
12614 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12616 char *submodule_name
;
12617 strcpy (name
, sym
->ns
->proc_name
->name
);
12618 module_name
= strtok (name
, ".");
12619 submodule_name
= strtok (NULL
, ".");
12621 iface
= sym
->tlink
;
12624 /* Make sure that the result uses the correct charlen for deferred
12626 if (iface
&& sym
->result
12627 && iface
->ts
.type
== BT_CHARACTER
12628 && iface
->ts
.deferred
)
12629 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12634 /* Check the procedure characteristics. */
12635 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12637 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12638 "PROCEDURE at %L and its interface in %s",
12639 &sym
->declared_at
, module_name
);
12643 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12645 gfc_error ("Mismatch in PURE attribute between MODULE "
12646 "PROCEDURE at %L and its interface in %s",
12647 &sym
->declared_at
, module_name
);
12651 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12653 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12654 "PROCEDURE at %L and its interface in %s",
12655 &sym
->declared_at
, module_name
);
12659 /* Check the result characteristics. */
12660 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12662 gfc_error ("%s between the MODULE PROCEDURE declaration "
12663 "in MODULE %qs and the declaration at %L in "
12665 errmsg
, module_name
, &sym
->declared_at
,
12666 submodule_name
? submodule_name
: module_name
);
12671 /* Check the characteristics of the formal arguments. */
12672 if (sym
->formal
&& sym
->formal_ns
)
12674 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12677 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12685 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12686 been defined and we now know their defined arguments, check that they fulfill
12687 the requirements of the standard for procedures used as finalizers. */
12690 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12692 gfc_finalizer
* list
;
12693 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12694 bool result
= true;
12695 bool seen_scalar
= false;
12698 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12701 gfc_resolve_finalizers (parent
, finalizable
);
12703 /* Ensure that derived-type components have a their finalizers resolved. */
12704 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12705 for (c
= derived
->components
; c
; c
= c
->next
)
12706 if (c
->ts
.type
== BT_DERIVED
12707 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12709 bool has_final2
= false;
12710 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12711 return false; /* Error. */
12712 has_final
= has_final
|| has_final2
;
12714 /* Return early if not finalizable. */
12718 *finalizable
= false;
12722 /* Walk over the list of finalizer-procedures, check them, and if any one
12723 does not fit in with the standard's definition, print an error and remove
12724 it from the list. */
12725 prev_link
= &derived
->f2k_derived
->finalizers
;
12726 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12728 gfc_formal_arglist
*dummy_args
;
12733 /* Skip this finalizer if we already resolved it. */
12734 if (list
->proc_tree
)
12736 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12737 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12738 seen_scalar
= true;
12739 prev_link
= &(list
->next
);
12743 /* Check this exists and is a SUBROUTINE. */
12744 if (!list
->proc_sym
->attr
.subroutine
)
12746 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12747 list
->proc_sym
->name
, &list
->where
);
12751 /* We should have exactly one argument. */
12752 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12753 if (!dummy_args
|| dummy_args
->next
)
12755 gfc_error ("FINAL procedure at %L must have exactly one argument",
12759 arg
= dummy_args
->sym
;
12761 /* This argument must be of our type. */
12762 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12764 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12765 &arg
->declared_at
, derived
->name
);
12769 /* It must neither be a pointer nor allocatable nor optional. */
12770 if (arg
->attr
.pointer
)
12772 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12773 &arg
->declared_at
);
12776 if (arg
->attr
.allocatable
)
12778 gfc_error ("Argument of FINAL procedure at %L must not be"
12779 " ALLOCATABLE", &arg
->declared_at
);
12782 if (arg
->attr
.optional
)
12784 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12785 &arg
->declared_at
);
12789 /* It must not be INTENT(OUT). */
12790 if (arg
->attr
.intent
== INTENT_OUT
)
12792 gfc_error ("Argument of FINAL procedure at %L must not be"
12793 " INTENT(OUT)", &arg
->declared_at
);
12797 /* Warn if the procedure is non-scalar and not assumed shape. */
12798 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12799 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12800 gfc_warning (OPT_Wsurprising
,
12801 "Non-scalar FINAL procedure at %L should have assumed"
12802 " shape argument", &arg
->declared_at
);
12804 /* Check that it does not match in kind and rank with a FINAL procedure
12805 defined earlier. To really loop over the *earlier* declarations,
12806 we need to walk the tail of the list as new ones were pushed at the
12808 /* TODO: Handle kind parameters once they are implemented. */
12809 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12810 for (i
= list
->next
; i
; i
= i
->next
)
12812 gfc_formal_arglist
*dummy_args
;
12814 /* Argument list might be empty; that is an error signalled earlier,
12815 but we nevertheless continued resolving. */
12816 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12819 gfc_symbol
* i_arg
= dummy_args
->sym
;
12820 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12821 if (i_rank
== my_rank
)
12823 gfc_error ("FINAL procedure %qs declared at %L has the same"
12824 " rank (%d) as %qs",
12825 list
->proc_sym
->name
, &list
->where
, my_rank
,
12826 i
->proc_sym
->name
);
12832 /* Is this the/a scalar finalizer procedure? */
12834 seen_scalar
= true;
12836 /* Find the symtree for this procedure. */
12837 gcc_assert (!list
->proc_tree
);
12838 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12840 prev_link
= &list
->next
;
12843 /* Remove wrong nodes immediately from the list so we don't risk any
12844 troubles in the future when they might fail later expectations. */
12847 *prev_link
= list
->next
;
12848 gfc_free_finalizer (i
);
12852 if (result
== false)
12855 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12856 were nodes in the list, must have been for arrays. It is surely a good
12857 idea to have a scalar version there if there's something to finalize. */
12858 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12859 gfc_warning (OPT_Wsurprising
,
12860 "Only array FINAL procedures declared for derived type %qs"
12861 " defined at %L, suggest also scalar one",
12862 derived
->name
, &derived
->declared_at
);
12864 vtab
= gfc_find_derived_vtab (derived
);
12865 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12866 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12869 *finalizable
= true;
12875 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12878 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12879 const char* generic_name
, locus where
)
12881 gfc_symbol
*sym1
, *sym2
;
12882 const char *pass1
, *pass2
;
12883 gfc_formal_arglist
*dummy_args
;
12885 gcc_assert (t1
->specific
&& t2
->specific
);
12886 gcc_assert (!t1
->specific
->is_generic
);
12887 gcc_assert (!t2
->specific
->is_generic
);
12888 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12890 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12891 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12896 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12897 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12898 || sym1
->attr
.function
!= sym2
->attr
.function
)
12900 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12901 " GENERIC %qs at %L",
12902 sym1
->name
, sym2
->name
, generic_name
, &where
);
12906 /* Determine PASS arguments. */
12907 if (t1
->specific
->nopass
)
12909 else if (t1
->specific
->pass_arg
)
12910 pass1
= t1
->specific
->pass_arg
;
12913 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12915 pass1
= dummy_args
->sym
->name
;
12919 if (t2
->specific
->nopass
)
12921 else if (t2
->specific
->pass_arg
)
12922 pass2
= t2
->specific
->pass_arg
;
12925 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12927 pass2
= dummy_args
->sym
->name
;
12932 /* Compare the interfaces. */
12933 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12934 NULL
, 0, pass1
, pass2
))
12936 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12937 sym1
->name
, sym2
->name
, generic_name
, &where
);
12945 /* Worker function for resolving a generic procedure binding; this is used to
12946 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12948 The difference between those cases is finding possible inherited bindings
12949 that are overridden, as one has to look for them in tb_sym_root,
12950 tb_uop_root or tb_op, respectively. Thus the caller must already find
12951 the super-type and set p->overridden correctly. */
12954 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12955 gfc_typebound_proc
* p
, const char* name
)
12957 gfc_tbp_generic
* target
;
12958 gfc_symtree
* first_target
;
12959 gfc_symtree
* inherited
;
12961 gcc_assert (p
&& p
->is_generic
);
12963 /* Try to find the specific bindings for the symtrees in our target-list. */
12964 gcc_assert (p
->u
.generic
);
12965 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12966 if (!target
->specific
)
12968 gfc_typebound_proc
* overridden_tbp
;
12969 gfc_tbp_generic
* g
;
12970 const char* target_name
;
12972 target_name
= target
->specific_st
->name
;
12974 /* Defined for this type directly. */
12975 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12977 target
->specific
= target
->specific_st
->n
.tb
;
12978 goto specific_found
;
12981 /* Look for an inherited specific binding. */
12984 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12989 gcc_assert (inherited
->n
.tb
);
12990 target
->specific
= inherited
->n
.tb
;
12991 goto specific_found
;
12995 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12996 " at %L", target_name
, name
, &p
->where
);
12999 /* Once we've found the specific binding, check it is not ambiguous with
13000 other specifics already found or inherited for the same GENERIC. */
13002 gcc_assert (target
->specific
);
13004 /* This must really be a specific binding! */
13005 if (target
->specific
->is_generic
)
13007 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13008 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13012 /* Check those already resolved on this type directly. */
13013 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13014 if (g
!= target
&& g
->specific
13015 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13018 /* Check for ambiguity with inherited specific targets. */
13019 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13020 overridden_tbp
= overridden_tbp
->overridden
)
13021 if (overridden_tbp
->is_generic
)
13023 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13025 gcc_assert (g
->specific
);
13026 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13032 /* If we attempt to "overwrite" a specific binding, this is an error. */
13033 if (p
->overridden
&& !p
->overridden
->is_generic
)
13035 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13036 " the same name", name
, &p
->where
);
13040 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13041 all must have the same attributes here. */
13042 first_target
= p
->u
.generic
->specific
->u
.specific
;
13043 gcc_assert (first_target
);
13044 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13045 p
->function
= first_target
->n
.sym
->attr
.function
;
13051 /* Resolve a GENERIC procedure binding for a derived type. */
13054 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13056 gfc_symbol
* super_type
;
13058 /* Find the overridden binding if any. */
13059 st
->n
.tb
->overridden
= NULL
;
13060 super_type
= gfc_get_derived_super_type (derived
);
13063 gfc_symtree
* overridden
;
13064 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13067 if (overridden
&& overridden
->n
.tb
)
13068 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13071 /* Resolve using worker function. */
13072 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13076 /* Retrieve the target-procedure of an operator binding and do some checks in
13077 common for intrinsic and user-defined type-bound operators. */
13080 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13082 gfc_symbol
* target_proc
;
13084 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13085 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13086 gcc_assert (target_proc
);
13088 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13089 if (target
->specific
->nopass
)
13091 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13095 return target_proc
;
13099 /* Resolve a type-bound intrinsic operator. */
13102 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13103 gfc_typebound_proc
* p
)
13105 gfc_symbol
* super_type
;
13106 gfc_tbp_generic
* target
;
13108 /* If there's already an error here, do nothing (but don't fail again). */
13112 /* Operators should always be GENERIC bindings. */
13113 gcc_assert (p
->is_generic
);
13115 /* Look for an overridden binding. */
13116 super_type
= gfc_get_derived_super_type (derived
);
13117 if (super_type
&& super_type
->f2k_derived
)
13118 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13121 p
->overridden
= NULL
;
13123 /* Resolve general GENERIC properties using worker function. */
13124 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13127 /* Check the targets to be procedures of correct interface. */
13128 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13130 gfc_symbol
* target_proc
;
13132 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13136 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13139 /* Add target to non-typebound operator list. */
13140 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13141 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13143 gfc_interface
*head
, *intr
;
13145 /* Preempt 'gfc_check_new_interface' for submodules, where the
13146 mechanism for handling module procedures winds up resolving
13147 operator interfaces twice and would otherwise cause an error. */
13148 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13149 if (intr
->sym
== target_proc
13150 && target_proc
->attr
.used_in_submodule
)
13153 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13154 target_proc
, p
->where
))
13156 head
= derived
->ns
->op
[op
];
13157 intr
= gfc_get_interface ();
13158 intr
->sym
= target_proc
;
13159 intr
->where
= p
->where
;
13161 derived
->ns
->op
[op
] = intr
;
13173 /* Resolve a type-bound user operator (tree-walker callback). */
13175 static gfc_symbol
* resolve_bindings_derived
;
13176 static bool resolve_bindings_result
;
13178 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13181 resolve_typebound_user_op (gfc_symtree
* stree
)
13183 gfc_symbol
* super_type
;
13184 gfc_tbp_generic
* target
;
13186 gcc_assert (stree
&& stree
->n
.tb
);
13188 if (stree
->n
.tb
->error
)
13191 /* Operators should always be GENERIC bindings. */
13192 gcc_assert (stree
->n
.tb
->is_generic
);
13194 /* Find overridden procedure, if any. */
13195 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13196 if (super_type
&& super_type
->f2k_derived
)
13198 gfc_symtree
* overridden
;
13199 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13200 stree
->name
, true, NULL
);
13202 if (overridden
&& overridden
->n
.tb
)
13203 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13206 stree
->n
.tb
->overridden
= NULL
;
13208 /* Resolve basically using worker function. */
13209 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13212 /* Check the targets to be functions of correct interface. */
13213 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13215 gfc_symbol
* target_proc
;
13217 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13221 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13228 resolve_bindings_result
= false;
13229 stree
->n
.tb
->error
= 1;
13233 /* Resolve the type-bound procedures for a derived type. */
13236 resolve_typebound_procedure (gfc_symtree
* stree
)
13240 gfc_symbol
* me_arg
;
13241 gfc_symbol
* super_type
;
13242 gfc_component
* comp
;
13244 gcc_assert (stree
);
13246 /* Undefined specific symbol from GENERIC target definition. */
13250 if (stree
->n
.tb
->error
)
13253 /* If this is a GENERIC binding, use that routine. */
13254 if (stree
->n
.tb
->is_generic
)
13256 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13261 /* Get the target-procedure to check it. */
13262 gcc_assert (!stree
->n
.tb
->is_generic
);
13263 gcc_assert (stree
->n
.tb
->u
.specific
);
13264 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13265 where
= stree
->n
.tb
->where
;
13267 /* Default access should already be resolved from the parser. */
13268 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13270 if (stree
->n
.tb
->deferred
)
13272 if (!check_proc_interface (proc
, &where
))
13277 /* Check for F08:C465. */
13278 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13279 || (proc
->attr
.proc
!= PROC_MODULE
13280 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13281 || proc
->attr
.abstract
)
13283 gfc_error ("%qs must be a module procedure or an external procedure with"
13284 " an explicit interface at %L", proc
->name
, &where
);
13289 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13290 stree
->n
.tb
->function
= proc
->attr
.function
;
13292 /* Find the super-type of the current derived type. We could do this once and
13293 store in a global if speed is needed, but as long as not I believe this is
13294 more readable and clearer. */
13295 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13297 /* If PASS, resolve and check arguments if not already resolved / loaded
13298 from a .mod file. */
13299 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13301 gfc_formal_arglist
*dummy_args
;
13303 dummy_args
= gfc_sym_get_dummy_args (proc
);
13304 if (stree
->n
.tb
->pass_arg
)
13306 gfc_formal_arglist
*i
;
13308 /* If an explicit passing argument name is given, walk the arg-list
13309 and look for it. */
13312 stree
->n
.tb
->pass_arg_num
= 1;
13313 for (i
= dummy_args
; i
; i
= i
->next
)
13315 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13320 ++stree
->n
.tb
->pass_arg_num
;
13325 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13327 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13328 stree
->n
.tb
->pass_arg
);
13334 /* Otherwise, take the first one; there should in fact be at least
13336 stree
->n
.tb
->pass_arg_num
= 1;
13339 gfc_error ("Procedure %qs with PASS at %L must have at"
13340 " least one argument", proc
->name
, &where
);
13343 me_arg
= dummy_args
->sym
;
13346 /* Now check that the argument-type matches and the passed-object
13347 dummy argument is generally fine. */
13349 gcc_assert (me_arg
);
13351 if (me_arg
->ts
.type
!= BT_CLASS
)
13353 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13354 " at %L", proc
->name
, &where
);
13358 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13359 != resolve_bindings_derived
)
13361 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13362 " the derived-type %qs", me_arg
->name
, proc
->name
,
13363 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13367 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13368 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13370 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13371 " scalar", proc
->name
, &where
);
13374 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13376 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13377 " be ALLOCATABLE", proc
->name
, &where
);
13380 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13382 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13383 " be POINTER", proc
->name
, &where
);
13388 /* If we are extending some type, check that we don't override a procedure
13389 flagged NON_OVERRIDABLE. */
13390 stree
->n
.tb
->overridden
= NULL
;
13393 gfc_symtree
* overridden
;
13394 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13395 stree
->name
, true, NULL
);
13399 if (overridden
->n
.tb
)
13400 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13402 if (!gfc_check_typebound_override (stree
, overridden
))
13407 /* See if there's a name collision with a component directly in this type. */
13408 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13409 if (!strcmp (comp
->name
, stree
->name
))
13411 gfc_error ("Procedure %qs at %L has the same name as a component of"
13413 stree
->name
, &where
, resolve_bindings_derived
->name
);
13417 /* Try to find a name collision with an inherited component. */
13418 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13421 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13422 " component of %qs",
13423 stree
->name
, &where
, resolve_bindings_derived
->name
);
13427 stree
->n
.tb
->error
= 0;
13431 resolve_bindings_result
= false;
13432 stree
->n
.tb
->error
= 1;
13437 resolve_typebound_procedures (gfc_symbol
* derived
)
13440 gfc_symbol
* super_type
;
13442 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13445 super_type
= gfc_get_derived_super_type (derived
);
13447 resolve_symbol (super_type
);
13449 resolve_bindings_derived
= derived
;
13450 resolve_bindings_result
= true;
13452 if (derived
->f2k_derived
->tb_sym_root
)
13453 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13454 &resolve_typebound_procedure
);
13456 if (derived
->f2k_derived
->tb_uop_root
)
13457 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13458 &resolve_typebound_user_op
);
13460 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13462 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13463 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13464 (gfc_intrinsic_op
)op
, p
))
13465 resolve_bindings_result
= false;
13468 return resolve_bindings_result
;
13472 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13473 to give all identical derived types the same backend_decl. */
13475 add_dt_to_dt_list (gfc_symbol
*derived
)
13477 gfc_dt_list
*dt_list
;
13479 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13480 if (derived
== dt_list
->derived
)
13483 dt_list
= gfc_get_dt_list ();
13484 dt_list
->next
= gfc_derived_types
;
13485 dt_list
->derived
= derived
;
13486 gfc_derived_types
= dt_list
;
13490 /* Ensure that a derived-type is really not abstract, meaning that every
13491 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13494 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13499 if (!ensure_not_abstract_walker (sub
, st
->left
))
13501 if (!ensure_not_abstract_walker (sub
, st
->right
))
13504 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13506 gfc_symtree
* overriding
;
13507 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13510 gcc_assert (overriding
->n
.tb
);
13511 if (overriding
->n
.tb
->deferred
)
13513 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13514 " %qs is DEFERRED and not overridden",
13515 sub
->name
, &sub
->declared_at
, st
->name
);
13524 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13526 /* The algorithm used here is to recursively travel up the ancestry of sub
13527 and for each ancestor-type, check all bindings. If any of them is
13528 DEFERRED, look it up starting from sub and see if the found (overriding)
13529 binding is not DEFERRED.
13530 This is not the most efficient way to do this, but it should be ok and is
13531 clearer than something sophisticated. */
13533 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13535 if (!ancestor
->attr
.abstract
)
13538 /* Walk bindings of this ancestor. */
13539 if (ancestor
->f2k_derived
)
13542 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13547 /* Find next ancestor type and recurse on it. */
13548 ancestor
= gfc_get_derived_super_type (ancestor
);
13550 return ensure_not_abstract (sub
, ancestor
);
13556 /* This check for typebound defined assignments is done recursively
13557 since the order in which derived types are resolved is not always in
13558 order of the declarations. */
13561 check_defined_assignments (gfc_symbol
*derived
)
13565 for (c
= derived
->components
; c
; c
= c
->next
)
13567 if (!gfc_bt_struct (c
->ts
.type
)
13569 || c
->attr
.allocatable
13570 || c
->attr
.proc_pointer_comp
13571 || c
->attr
.class_pointer
13572 || c
->attr
.proc_pointer
)
13575 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13576 || (c
->ts
.u
.derived
->f2k_derived
13577 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13579 derived
->attr
.defined_assign_comp
= 1;
13583 check_defined_assignments (c
->ts
.u
.derived
);
13584 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13586 derived
->attr
.defined_assign_comp
= 1;
13593 /* Resolve a single component of a derived type or structure. */
13596 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13598 gfc_symbol
*super_type
;
13600 if (c
->attr
.artificial
)
13603 /* Do not allow vtype components to be resolved in nameless namespaces
13604 such as block data because the procedure pointers will cause ICEs
13605 and vtables are not needed in these contexts. */
13606 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13607 && sym
->ns
->proc_name
== NULL
)
13611 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13612 && c
->attr
.codimension
13613 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13615 gfc_error ("Coarray component %qs at %L must be allocatable with "
13616 "deferred shape", c
->name
, &c
->loc
);
13621 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13622 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13624 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13625 "shall not be a coarray", c
->name
, &c
->loc
);
13630 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13631 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13632 || c
->attr
.allocatable
))
13634 gfc_error ("Component %qs at %L with coarray component "
13635 "shall be a nonpointer, nonallocatable scalar",
13641 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13643 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13644 "is not an array pointer", c
->name
, &c
->loc
);
13648 /* F2003, 15.2.1 - length has to be one. */
13649 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13650 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13651 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13652 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13654 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13659 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13661 gfc_symbol
*ifc
= c
->ts
.interface
;
13663 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13669 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13671 /* Resolve interface and copy attributes. */
13672 if (ifc
->formal
&& !ifc
->formal_ns
)
13673 resolve_symbol (ifc
);
13674 if (ifc
->attr
.intrinsic
)
13675 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13679 c
->ts
= ifc
->result
->ts
;
13680 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13681 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13682 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13683 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13684 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13689 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13690 c
->attr
.pointer
= ifc
->attr
.pointer
;
13691 c
->attr
.dimension
= ifc
->attr
.dimension
;
13692 c
->as
= gfc_copy_array_spec (ifc
->as
);
13693 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13695 c
->ts
.interface
= ifc
;
13696 c
->attr
.function
= ifc
->attr
.function
;
13697 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13699 c
->attr
.pure
= ifc
->attr
.pure
;
13700 c
->attr
.elemental
= ifc
->attr
.elemental
;
13701 c
->attr
.recursive
= ifc
->attr
.recursive
;
13702 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13703 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13704 /* Copy char length. */
13705 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13707 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13708 if (cl
->length
&& !cl
->resolved
13709 && !gfc_resolve_expr (cl
->length
))
13718 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13720 /* Since PPCs are not implicitly typed, a PPC without an explicit
13721 interface must be a subroutine. */
13722 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13725 /* Procedure pointer components: Check PASS arg. */
13726 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13727 && !sym
->attr
.vtype
)
13729 gfc_symbol
* me_arg
;
13731 if (c
->tb
->pass_arg
)
13733 gfc_formal_arglist
* i
;
13735 /* If an explicit passing argument name is given, walk the arg-list
13736 and look for it. */
13739 c
->tb
->pass_arg_num
= 1;
13740 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13742 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13747 c
->tb
->pass_arg_num
++;
13752 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13753 "at %L has no argument %qs", c
->name
,
13754 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13761 /* Otherwise, take the first one; there should in fact be at least
13763 c
->tb
->pass_arg_num
= 1;
13764 if (!c
->ts
.interface
->formal
)
13766 gfc_error ("Procedure pointer component %qs with PASS at %L "
13767 "must have at least one argument",
13772 me_arg
= c
->ts
.interface
->formal
->sym
;
13775 /* Now check that the argument-type matches. */
13776 gcc_assert (me_arg
);
13777 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13778 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13779 || (me_arg
->ts
.type
== BT_CLASS
13780 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13782 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13783 " the derived type %qs", me_arg
->name
, c
->name
,
13784 me_arg
->name
, &c
->loc
, sym
->name
);
13789 /* Check for F03:C453. */
13790 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13792 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13793 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13799 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13801 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13802 "may not have the POINTER attribute", me_arg
->name
,
13803 c
->name
, me_arg
->name
, &c
->loc
);
13808 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13810 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13811 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13812 me_arg
->name
, &c
->loc
);
13817 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13819 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13820 " at %L", c
->name
, &c
->loc
);
13826 /* Check type-spec if this is not the parent-type component. */
13827 if (((sym
->attr
.is_class
13828 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13829 || c
!= sym
->components
->ts
.u
.derived
->components
))
13830 || (!sym
->attr
.is_class
13831 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13832 && !sym
->attr
.vtype
13833 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13836 super_type
= gfc_get_derived_super_type (sym
);
13838 /* If this type is an extension, set the accessibility of the parent
13841 && ((sym
->attr
.is_class
13842 && c
== sym
->components
->ts
.u
.derived
->components
)
13843 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13844 && strcmp (super_type
->name
, c
->name
) == 0)
13845 c
->attr
.access
= super_type
->attr
.access
;
13847 /* If this type is an extension, see if this component has the same name
13848 as an inherited type-bound procedure. */
13849 if (super_type
&& !sym
->attr
.is_class
13850 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13852 gfc_error ("Component %qs of %qs at %L has the same name as an"
13853 " inherited type-bound procedure",
13854 c
->name
, sym
->name
, &c
->loc
);
13858 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13859 && !c
->ts
.deferred
)
13861 if (c
->ts
.u
.cl
->length
== NULL
13862 || (!resolve_charlen(c
->ts
.u
.cl
))
13863 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13865 gfc_error ("Character length of component %qs needs to "
13866 "be a constant specification expression at %L",
13868 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13873 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13874 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13876 gfc_error ("Character component %qs of %qs at %L with deferred "
13877 "length must be a POINTER or ALLOCATABLE",
13878 c
->name
, sym
->name
, &c
->loc
);
13882 /* Add the hidden deferred length field. */
13883 if (c
->ts
.type
== BT_CHARACTER
13884 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13885 && !c
->attr
.function
13886 && !sym
->attr
.is_class
)
13888 char name
[GFC_MAX_SYMBOL_LEN
+9];
13889 gfc_component
*strlen
;
13890 sprintf (name
, "_%s_length", c
->name
);
13891 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13892 if (strlen
== NULL
)
13894 if (!gfc_add_component (sym
, name
, &strlen
))
13896 strlen
->ts
.type
= BT_INTEGER
;
13897 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13898 strlen
->attr
.access
= ACCESS_PRIVATE
;
13899 strlen
->attr
.artificial
= 1;
13903 if (c
->ts
.type
== BT_DERIVED
13904 && sym
->component_access
!= ACCESS_PRIVATE
13905 && gfc_check_symbol_access (sym
)
13906 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13907 && !c
->ts
.u
.derived
->attr
.use_assoc
13908 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13909 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13910 "PRIVATE type and cannot be a component of "
13911 "%qs, which is PUBLIC at %L", c
->name
,
13912 sym
->name
, &sym
->declared_at
))
13915 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13917 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13918 "type %s", c
->name
, &c
->loc
, sym
->name
);
13922 if (sym
->attr
.sequence
)
13924 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13926 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13927 "not have the SEQUENCE attribute",
13928 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13933 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13934 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13935 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13936 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13937 CLASS_DATA (c
)->ts
.u
.derived
13938 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13940 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13941 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13942 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13944 gfc_error ("The pointer component %qs of %qs at %L is a type "
13945 "that has not been declared", c
->name
, sym
->name
,
13950 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13951 && CLASS_DATA (c
)->attr
.class_pointer
13952 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13953 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13954 && !UNLIMITED_POLY (c
))
13956 gfc_error ("The pointer component %qs of %qs at %L is a type "
13957 "that has not been declared", c
->name
, sym
->name
,
13962 /* If an allocatable component derived type is of the same type as
13963 the enclosing derived type, we need a vtable generating so that
13964 the __deallocate procedure is created. */
13965 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13966 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13967 gfc_find_vtab (&c
->ts
);
13969 /* Ensure that all the derived type components are put on the
13970 derived type list; even in formal namespaces, where derived type
13971 pointer components might not have been declared. */
13972 if (c
->ts
.type
== BT_DERIVED
13974 && c
->ts
.u
.derived
->components
13976 && sym
!= c
->ts
.u
.derived
)
13977 add_dt_to_dt_list (c
->ts
.u
.derived
);
13979 if (!gfc_resolve_array_spec (c
->as
,
13980 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13981 || c
->attr
.allocatable
)))
13984 if (c
->initializer
&& !sym
->attr
.vtype
13985 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
13986 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13993 /* Be nice about the locus for a structure expression - show the locus of the
13994 first non-null sub-expression if we can. */
13997 cons_where (gfc_expr
*struct_expr
)
13999 gfc_constructor
*cons
;
14001 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14003 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14004 for (; cons
; cons
= gfc_constructor_next (cons
))
14006 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14007 return &cons
->expr
->where
;
14010 return &struct_expr
->where
;
14013 /* Resolve the components of a structure type. Much less work than derived
14017 resolve_fl_struct (gfc_symbol
*sym
)
14020 gfc_expr
*init
= NULL
;
14023 /* Make sure UNIONs do not have overlapping initializers. */
14024 if (sym
->attr
.flavor
== FL_UNION
)
14026 for (c
= sym
->components
; c
; c
= c
->next
)
14028 if (init
&& c
->initializer
)
14030 gfc_error ("Conflicting initializers in union at %L and %L",
14031 cons_where (init
), cons_where (c
->initializer
));
14032 gfc_free_expr (c
->initializer
);
14033 c
->initializer
= NULL
;
14036 init
= c
->initializer
;
14041 for (c
= sym
->components
; c
; c
= c
->next
)
14042 if (!resolve_component (c
, sym
))
14048 if (sym
->components
)
14049 add_dt_to_dt_list (sym
);
14055 /* Resolve the components of a derived type. This does not have to wait until
14056 resolution stage, but can be done as soon as the dt declaration has been
14060 resolve_fl_derived0 (gfc_symbol
*sym
)
14062 gfc_symbol
* super_type
;
14064 gfc_formal_arglist
*f
;
14067 if (sym
->attr
.unlimited_polymorphic
)
14070 super_type
= gfc_get_derived_super_type (sym
);
14073 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14075 gfc_error ("As extending type %qs at %L has a coarray component, "
14076 "parent type %qs shall also have one", sym
->name
,
14077 &sym
->declared_at
, super_type
->name
);
14081 /* Ensure the extended type gets resolved before we do. */
14082 if (super_type
&& !resolve_fl_derived0 (super_type
))
14085 /* An ABSTRACT type must be extensible. */
14086 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14088 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14089 sym
->name
, &sym
->declared_at
);
14093 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14097 for ( ; c
!= NULL
; c
= c
->next
)
14098 if (!resolve_component (c
, sym
))
14104 /* Now add the caf token field, where needed. */
14105 if (flag_coarray
!= GFC_FCOARRAY_NONE
14106 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14108 for (c
= sym
->components
; c
; c
= c
->next
)
14109 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14110 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14112 char name
[GFC_MAX_SYMBOL_LEN
+9];
14113 gfc_component
*token
;
14114 sprintf (name
, "_caf_%s", c
->name
);
14115 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14118 if (!gfc_add_component (sym
, name
, &token
))
14120 token
->ts
.type
= BT_VOID
;
14121 token
->ts
.kind
= gfc_default_integer_kind
;
14122 token
->attr
.access
= ACCESS_PRIVATE
;
14123 token
->attr
.artificial
= 1;
14124 token
->attr
.caf_token
= 1;
14129 check_defined_assignments (sym
);
14131 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14132 sym
->attr
.defined_assign_comp
14133 = super_type
->attr
.defined_assign_comp
;
14135 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14136 all DEFERRED bindings are overridden. */
14137 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14138 && !sym
->attr
.is_class
14139 && !ensure_not_abstract (sym
, super_type
))
14142 /* Check that there is a component for every PDT parameter. */
14143 if (sym
->attr
.pdt_template
)
14145 for (f
= sym
->formal
; f
; f
= f
->next
)
14149 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14152 gfc_error ("Parameterized type %qs does not have a component "
14153 "corresponding to parameter %qs at %L", sym
->name
,
14154 f
->sym
->name
, &sym
->declared_at
);
14160 /* Add derived type to the derived type list. */
14161 add_dt_to_dt_list (sym
);
14167 /* The following procedure does the full resolution of a derived type,
14168 including resolution of all type-bound procedures (if present). In contrast
14169 to 'resolve_fl_derived0' this can only be done after the module has been
14170 parsed completely. */
14173 resolve_fl_derived (gfc_symbol
*sym
)
14175 gfc_symbol
*gen_dt
= NULL
;
14177 if (sym
->attr
.unlimited_polymorphic
)
14180 if (!sym
->attr
.is_class
)
14181 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14182 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14183 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14184 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14185 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14186 "%qs at %L being the same name as derived "
14187 "type at %L", sym
->name
,
14188 gen_dt
->generic
->sym
== sym
14189 ? gen_dt
->generic
->next
->sym
->name
14190 : gen_dt
->generic
->sym
->name
,
14191 gen_dt
->generic
->sym
== sym
14192 ? &gen_dt
->generic
->next
->sym
->declared_at
14193 : &gen_dt
->generic
->sym
->declared_at
,
14194 &sym
->declared_at
))
14197 /* Resolve the finalizer procedures. */
14198 if (!gfc_resolve_finalizers (sym
, NULL
))
14201 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14203 /* Fix up incomplete CLASS symbols. */
14204 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14205 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14207 /* Nothing more to do for unlimited polymorphic entities. */
14208 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14210 else if (vptr
->ts
.u
.derived
== NULL
)
14212 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14214 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14215 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14220 if (!resolve_fl_derived0 (sym
))
14223 /* Resolve the type-bound procedures. */
14224 if (!resolve_typebound_procedures (sym
))
14227 /* Generate module vtables subject to their accessibility and their not
14228 being vtables or pdt templates. If this is not done class declarations
14229 in external procedures wind up with their own version and so SELECT TYPE
14230 fails because the vptrs do not have the same address. */
14231 if (gfc_option
.allow_std
& GFC_STD_F2003
14232 && sym
->ns
->proc_name
14233 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14234 && sym
->attr
.access
!= ACCESS_PRIVATE
14235 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14237 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14238 gfc_set_sym_referenced (vtab
);
14246 resolve_fl_namelist (gfc_symbol
*sym
)
14251 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14253 /* Check again, the check in match only works if NAMELIST comes
14255 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14257 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14258 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14262 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14263 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14264 "with assumed shape in namelist %qs at %L",
14265 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14268 if (is_non_constant_shape_array (nl
->sym
)
14269 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14270 "with nonconstant shape in namelist %qs at %L",
14271 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14274 if (nl
->sym
->ts
.type
== BT_CHARACTER
14275 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14276 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14277 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14278 "nonconstant character length in "
14279 "namelist %qs at %L", nl
->sym
->name
,
14280 sym
->name
, &sym
->declared_at
))
14285 /* Reject PRIVATE objects in a PUBLIC namelist. */
14286 if (gfc_check_symbol_access (sym
))
14288 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14290 if (!nl
->sym
->attr
.use_assoc
14291 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14292 && !gfc_check_symbol_access (nl
->sym
))
14294 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14295 "cannot be member of PUBLIC namelist %qs at %L",
14296 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14300 if (nl
->sym
->ts
.type
== BT_DERIVED
14301 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14302 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14304 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14305 "namelist %qs at %L with ALLOCATABLE "
14306 "or POINTER components", nl
->sym
->name
,
14307 sym
->name
, &sym
->declared_at
))
14312 /* Types with private components that came here by USE-association. */
14313 if (nl
->sym
->ts
.type
== BT_DERIVED
14314 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14316 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14317 "components and cannot be member of namelist %qs at %L",
14318 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14322 /* Types with private components that are defined in the same module. */
14323 if (nl
->sym
->ts
.type
== BT_DERIVED
14324 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14325 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14327 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14328 "cannot be a member of PUBLIC namelist %qs at %L",
14329 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14336 /* 14.1.2 A module or internal procedure represent local entities
14337 of the same type as a namelist member and so are not allowed. */
14338 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14340 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14343 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14344 if ((nl
->sym
== sym
->ns
->proc_name
)
14346 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14351 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14352 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14354 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14355 "attribute in %qs at %L", nlsym
->name
,
14356 &sym
->declared_at
);
14363 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14364 nl
->sym
->attr
.asynchronous
= 1;
14371 resolve_fl_parameter (gfc_symbol
*sym
)
14373 /* A parameter array's shape needs to be constant. */
14374 if (sym
->as
!= NULL
14375 && (sym
->as
->type
== AS_DEFERRED
14376 || is_non_constant_shape_array (sym
)))
14378 gfc_error ("Parameter array %qs at %L cannot be automatic "
14379 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14383 /* Constraints on deferred type parameter. */
14384 if (!deferred_requirements (sym
))
14387 /* Make sure a parameter that has been implicitly typed still
14388 matches the implicit type, since PARAMETER statements can precede
14389 IMPLICIT statements. */
14390 if (sym
->attr
.implicit_type
14391 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14394 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14395 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14399 /* Make sure the types of derived parameters are consistent. This
14400 type checking is deferred until resolution because the type may
14401 refer to a derived type from the host. */
14402 if (sym
->ts
.type
== BT_DERIVED
14403 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14405 gfc_error ("Incompatible derived type in PARAMETER at %L",
14406 &sym
->value
->where
);
14410 /* F03:C509,C514. */
14411 if (sym
->ts
.type
== BT_CLASS
)
14413 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14414 sym
->name
, &sym
->declared_at
);
14422 /* Called by resolve_symbol to check PDTs. */
14425 resolve_pdt (gfc_symbol
* sym
)
14427 gfc_symbol
*derived
= NULL
;
14428 gfc_actual_arglist
*param
;
14430 bool const_len_exprs
= true;
14431 bool assumed_len_exprs
= false;
14432 symbol_attribute
*attr
;
14434 if (sym
->ts
.type
== BT_DERIVED
)
14436 derived
= sym
->ts
.u
.derived
;
14437 attr
= &(sym
->attr
);
14439 else if (sym
->ts
.type
== BT_CLASS
)
14441 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14442 attr
= &(CLASS_DATA (sym
)->attr
);
14445 gcc_unreachable ();
14447 gcc_assert (derived
->attr
.pdt_type
);
14449 for (param
= sym
->param_list
; param
; param
= param
->next
)
14451 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14453 if (c
->attr
.pdt_kind
)
14456 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14457 && c
->attr
.pdt_len
)
14458 const_len_exprs
= false;
14459 else if (param
->spec_type
== SPEC_ASSUMED
)
14460 assumed_len_exprs
= true;
14462 if (param
->spec_type
== SPEC_DEFERRED
14463 && !attr
->allocatable
&& !attr
->pointer
)
14464 gfc_error ("The object %qs at %L has a deferred LEN "
14465 "parameter %qs and is neither allocatable "
14466 "nor a pointer", sym
->name
, &sym
->declared_at
,
14471 if (!const_len_exprs
14472 && (sym
->ns
->proc_name
->attr
.is_main_program
14473 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14474 || sym
->attr
.save
!= SAVE_NONE
))
14475 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14476 "SAVE attribute or be a variable declared in the "
14477 "main program, a module or a submodule(F08/C513)",
14478 sym
->name
, &sym
->declared_at
);
14480 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14481 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14482 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14483 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14484 sym
->name
, &sym
->declared_at
);
14488 /* Do anything necessary to resolve a symbol. Right now, we just
14489 assume that an otherwise unknown symbol is a variable. This sort
14490 of thing commonly happens for symbols in module. */
14493 resolve_symbol (gfc_symbol
*sym
)
14495 int check_constant
, mp_flag
;
14496 gfc_symtree
*symtree
;
14497 gfc_symtree
*this_symtree
;
14500 symbol_attribute class_attr
;
14501 gfc_array_spec
*as
;
14502 bool saved_specification_expr
;
14508 /* No symbol will ever have union type; only components can be unions.
14509 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14510 (just like derived type declaration symbols have flavor FL_DERIVED). */
14511 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14513 /* Coarrayed polymorphic objects with allocatable or pointer components are
14514 yet unsupported for -fcoarray=lib. */
14515 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14516 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14517 && CLASS_DATA (sym
)->attr
.codimension
14518 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14519 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14521 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14522 "type coarrays at %L are unsupported", &sym
->declared_at
);
14526 if (sym
->attr
.artificial
)
14529 if (sym
->attr
.unlimited_polymorphic
)
14532 if (sym
->attr
.flavor
== FL_UNKNOWN
14533 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14534 && !sym
->attr
.generic
&& !sym
->attr
.external
14535 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14536 && sym
->ts
.type
== BT_UNKNOWN
))
14539 /* If we find that a flavorless symbol is an interface in one of the
14540 parent namespaces, find its symtree in this namespace, free the
14541 symbol and set the symtree to point to the interface symbol. */
14542 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14544 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14545 if (symtree
&& (symtree
->n
.sym
->generic
||
14546 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14547 && sym
->ns
->construct_entities
)))
14549 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14551 if (this_symtree
->n
.sym
== sym
)
14553 symtree
->n
.sym
->refs
++;
14554 gfc_release_symbol (sym
);
14555 this_symtree
->n
.sym
= symtree
->n
.sym
;
14561 /* Otherwise give it a flavor according to such attributes as
14563 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14564 && sym
->attr
.intrinsic
== 0)
14565 sym
->attr
.flavor
= FL_VARIABLE
;
14566 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14568 sym
->attr
.flavor
= FL_PROCEDURE
;
14569 if (sym
->attr
.dimension
)
14570 sym
->attr
.function
= 1;
14574 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14575 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14577 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14578 && !resolve_procedure_interface (sym
))
14581 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14582 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14584 if (sym
->attr
.external
)
14585 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14586 "at %L", &sym
->declared_at
);
14588 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14589 "at %L", &sym
->declared_at
);
14594 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14597 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14598 && !resolve_fl_struct (sym
))
14601 /* Symbols that are module procedures with results (functions) have
14602 the types and array specification copied for type checking in
14603 procedures that call them, as well as for saving to a module
14604 file. These symbols can't stand the scrutiny that their results
14606 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14608 /* Make sure that the intrinsic is consistent with its internal
14609 representation. This needs to be done before assigning a default
14610 type to avoid spurious warnings. */
14611 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14612 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14615 /* Resolve associate names. */
14617 resolve_assoc_var (sym
, true);
14619 /* Assign default type to symbols that need one and don't have one. */
14620 if (sym
->ts
.type
== BT_UNKNOWN
)
14622 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14624 gfc_set_default_type (sym
, 1, NULL
);
14627 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14628 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14629 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14630 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14632 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14634 /* The specific case of an external procedure should emit an error
14635 in the case that there is no implicit type. */
14638 if (!sym
->attr
.mixed_entry_master
)
14639 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14643 /* Result may be in another namespace. */
14644 resolve_symbol (sym
->result
);
14646 if (!sym
->result
->attr
.proc_pointer
)
14648 sym
->ts
= sym
->result
->ts
;
14649 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14650 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14651 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14652 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14653 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14658 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14660 bool saved_specification_expr
= specification_expr
;
14661 specification_expr
= true;
14662 gfc_resolve_array_spec (sym
->result
->as
, false);
14663 specification_expr
= saved_specification_expr
;
14666 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14668 as
= CLASS_DATA (sym
)->as
;
14669 class_attr
= CLASS_DATA (sym
)->attr
;
14670 class_attr
.pointer
= class_attr
.class_pointer
;
14674 class_attr
= sym
->attr
;
14679 if (sym
->attr
.contiguous
14680 && (!class_attr
.dimension
14681 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14682 && !class_attr
.pointer
)))
14684 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14685 "array pointer or an assumed-shape or assumed-rank array",
14686 sym
->name
, &sym
->declared_at
);
14690 /* Assumed size arrays and assumed shape arrays must be dummy
14691 arguments. Array-spec's of implied-shape should have been resolved to
14692 AS_EXPLICIT already. */
14696 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14697 specification expression. */
14698 if (as
->type
== AS_IMPLIED_SHAPE
)
14701 for (i
=0; i
<as
->rank
; i
++)
14703 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14705 gfc_error ("Bad specification for assumed size array at %L",
14706 &as
->lower
[i
]->where
);
14713 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14714 || as
->type
== AS_ASSUMED_SHAPE
)
14715 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14717 if (as
->type
== AS_ASSUMED_SIZE
)
14718 gfc_error ("Assumed size array at %L must be a dummy argument",
14719 &sym
->declared_at
);
14721 gfc_error ("Assumed shape array at %L must be a dummy argument",
14722 &sym
->declared_at
);
14725 /* TS 29113, C535a. */
14726 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14727 && !sym
->attr
.select_type_temporary
)
14729 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14730 &sym
->declared_at
);
14733 if (as
->type
== AS_ASSUMED_RANK
14734 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14736 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14737 "CODIMENSION attribute", &sym
->declared_at
);
14742 /* Make sure symbols with known intent or optional are really dummy
14743 variable. Because of ENTRY statement, this has to be deferred
14744 until resolution time. */
14746 if (!sym
->attr
.dummy
14747 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14749 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14753 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14755 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14756 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14760 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14762 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14763 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14765 gfc_error ("Character dummy variable %qs at %L with VALUE "
14766 "attribute must have constant length",
14767 sym
->name
, &sym
->declared_at
);
14771 if (sym
->ts
.is_c_interop
14772 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14774 gfc_error ("C interoperable character dummy variable %qs at %L "
14775 "with VALUE attribute must have length one",
14776 sym
->name
, &sym
->declared_at
);
14781 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14782 && sym
->ts
.u
.derived
->attr
.generic
)
14784 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14785 if (!sym
->ts
.u
.derived
)
14787 gfc_error ("The derived type %qs at %L is of type %qs, "
14788 "which has not been defined", sym
->name
,
14789 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14790 sym
->ts
.type
= BT_UNKNOWN
;
14795 /* Use the same constraints as TYPE(*), except for the type check
14796 and that only scalars and assumed-size arrays are permitted. */
14797 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14799 if (!sym
->attr
.dummy
)
14801 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14802 "a dummy argument", sym
->name
, &sym
->declared_at
);
14806 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14807 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14808 && sym
->ts
.type
!= BT_COMPLEX
)
14810 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14811 "of type TYPE(*) or of an numeric intrinsic type",
14812 sym
->name
, &sym
->declared_at
);
14816 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14817 || sym
->attr
.pointer
|| sym
->attr
.value
)
14819 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14820 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14821 "attribute", sym
->name
, &sym
->declared_at
);
14825 if (sym
->attr
.intent
== INTENT_OUT
)
14827 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14828 "have the INTENT(OUT) attribute",
14829 sym
->name
, &sym
->declared_at
);
14832 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14834 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14835 "either be a scalar or an assumed-size array",
14836 sym
->name
, &sym
->declared_at
);
14840 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14841 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14843 sym
->ts
.type
= BT_ASSUMED
;
14844 sym
->as
= gfc_get_array_spec ();
14845 sym
->as
->type
= AS_ASSUMED_SIZE
;
14847 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14849 else if (sym
->ts
.type
== BT_ASSUMED
)
14851 /* TS 29113, C407a. */
14852 if (!sym
->attr
.dummy
)
14854 gfc_error ("Assumed type of variable %s at %L is only permitted "
14855 "for dummy variables", sym
->name
, &sym
->declared_at
);
14858 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14859 || sym
->attr
.pointer
|| sym
->attr
.value
)
14861 gfc_error ("Assumed-type variable %s at %L may not have the "
14862 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14863 sym
->name
, &sym
->declared_at
);
14866 if (sym
->attr
.intent
== INTENT_OUT
)
14868 gfc_error ("Assumed-type variable %s at %L may not have the "
14869 "INTENT(OUT) attribute",
14870 sym
->name
, &sym
->declared_at
);
14873 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14875 gfc_error ("Assumed-type variable %s at %L shall not be an "
14876 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14881 /* If the symbol is marked as bind(c), that it is declared at module level
14882 scope and verify its type and kind. Do not do the latter for symbols
14883 that are implicitly typed because that is handled in
14884 gfc_set_default_type. Handle dummy arguments and procedure definitions
14885 separately. Also, anything that is use associated is not handled here
14886 but instead is handled in the module it is declared in. Finally, derived
14887 type definitions are allowed to be BIND(C) since that only implies that
14888 they're interoperable, and they are checked fully for interoperability
14889 when a variable is declared of that type. */
14890 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14891 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14892 && sym
->attr
.flavor
!= FL_DERIVED
)
14896 /* First, make sure the variable is declared at the
14897 module-level scope (J3/04-007, Section 15.3). */
14898 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14899 sym
->attr
.in_common
== 0)
14901 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14902 "is neither a COMMON block nor declared at the "
14903 "module level scope", sym
->name
, &(sym
->declared_at
));
14906 else if (sym
->ts
.type
== BT_CHARACTER
14907 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14908 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14909 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14911 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14912 sym
->name
, &sym
->declared_at
);
14915 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14917 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14919 else if (sym
->attr
.implicit_type
== 0)
14921 /* If type() declaration, we need to verify that the components
14922 of the given type are all C interoperable, etc. */
14923 if (sym
->ts
.type
== BT_DERIVED
&&
14924 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14926 /* Make sure the user marked the derived type as BIND(C). If
14927 not, call the verify routine. This could print an error
14928 for the derived type more than once if multiple variables
14929 of that type are declared. */
14930 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14931 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14935 /* Verify the variable itself as C interoperable if it
14936 is BIND(C). It is not possible for this to succeed if
14937 the verify_bind_c_derived_type failed, so don't have to handle
14938 any error returned by verify_bind_c_derived_type. */
14939 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14940 sym
->common_block
);
14945 /* clear the is_bind_c flag to prevent reporting errors more than
14946 once if something failed. */
14947 sym
->attr
.is_bind_c
= 0;
14952 /* If a derived type symbol has reached this point, without its
14953 type being declared, we have an error. Notice that most
14954 conditions that produce undefined derived types have already
14955 been dealt with. However, the likes of:
14956 implicit type(t) (t) ..... call foo (t) will get us here if
14957 the type is not declared in the scope of the implicit
14958 statement. Change the type to BT_UNKNOWN, both because it is so
14959 and to prevent an ICE. */
14960 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14961 && sym
->ts
.u
.derived
->components
== NULL
14962 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14964 gfc_error ("The derived type %qs at %L is of type %qs, "
14965 "which has not been defined", sym
->name
,
14966 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14967 sym
->ts
.type
= BT_UNKNOWN
;
14971 /* Make sure that the derived type has been resolved and that the
14972 derived type is visible in the symbol's namespace, if it is a
14973 module function and is not PRIVATE. */
14974 if (sym
->ts
.type
== BT_DERIVED
14975 && sym
->ts
.u
.derived
->attr
.use_assoc
14976 && sym
->ns
->proc_name
14977 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14978 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14981 /* Unless the derived-type declaration is use associated, Fortran 95
14982 does not allow public entries of private derived types.
14983 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14984 161 in 95-006r3. */
14985 if (sym
->ts
.type
== BT_DERIVED
14986 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14987 && !sym
->ts
.u
.derived
->attr
.use_assoc
14988 && gfc_check_symbol_access (sym
)
14989 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14990 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14991 "derived type %qs",
14992 (sym
->attr
.flavor
== FL_PARAMETER
)
14993 ? "parameter" : "variable",
14994 sym
->name
, &sym
->declared_at
,
14995 sym
->ts
.u
.derived
->name
))
14998 /* F2008, C1302. */
14999 if (sym
->ts
.type
== BT_DERIVED
15000 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15001 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15002 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15003 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15005 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15006 "type LOCK_TYPE must be a coarray", sym
->name
,
15007 &sym
->declared_at
);
15011 /* TS18508, C702/C703. */
15012 if (sym
->ts
.type
== BT_DERIVED
15013 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15014 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15015 || sym
->ts
.u
.derived
->attr
.event_comp
)
15016 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15018 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15019 "type EVENT_TYPE must be a coarray", sym
->name
,
15020 &sym
->declared_at
);
15024 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15025 default initialization is defined (5.1.2.4.4). */
15026 if (sym
->ts
.type
== BT_DERIVED
15028 && sym
->attr
.intent
== INTENT_OUT
15030 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15032 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15034 if (c
->initializer
)
15036 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15037 "ASSUMED SIZE and so cannot have a default initializer",
15038 sym
->name
, &sym
->declared_at
);
15045 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15046 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15048 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15049 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15054 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15055 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15057 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15058 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15063 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15064 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15065 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15066 || class_attr
.codimension
)
15067 && (sym
->attr
.result
|| sym
->result
== sym
))
15069 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15070 "a coarray component", sym
->name
, &sym
->declared_at
);
15075 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15076 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15078 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15079 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15084 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15085 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15086 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15087 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15088 || class_attr
.allocatable
))
15090 gfc_error ("Variable %qs at %L with coarray component shall be a "
15091 "nonpointer, nonallocatable scalar, which is not a coarray",
15092 sym
->name
, &sym
->declared_at
);
15096 /* F2008, C526. The function-result case was handled above. */
15097 if (class_attr
.codimension
15098 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15099 || sym
->attr
.select_type_temporary
15100 || sym
->attr
.associate_var
15101 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15102 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15103 || sym
->ns
->proc_name
->attr
.is_main_program
15104 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15106 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15107 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15111 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15112 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15114 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15115 "deferred shape", sym
->name
, &sym
->declared_at
);
15118 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15119 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15121 gfc_error ("Allocatable coarray variable %qs at %L must have "
15122 "deferred shape", sym
->name
, &sym
->declared_at
);
15127 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15128 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15129 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15130 || (class_attr
.codimension
&& class_attr
.allocatable
))
15131 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15133 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15134 "allocatable coarray or have coarray components",
15135 sym
->name
, &sym
->declared_at
);
15139 if (class_attr
.codimension
&& sym
->attr
.dummy
15140 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15142 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15143 "procedure %qs", sym
->name
, &sym
->declared_at
,
15144 sym
->ns
->proc_name
->name
);
15148 if (sym
->ts
.type
== BT_LOGICAL
15149 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15150 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15151 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15154 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15155 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15157 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15158 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15159 "%L with non-C_Bool kind in BIND(C) procedure "
15160 "%qs", sym
->name
, &sym
->declared_at
,
15161 sym
->ns
->proc_name
->name
))
15163 else if (!gfc_logical_kinds
[i
].c_bool
15164 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15165 "%qs at %L with non-C_Bool kind in "
15166 "BIND(C) procedure %qs", sym
->name
,
15168 sym
->attr
.function
? sym
->name
15169 : sym
->ns
->proc_name
->name
))
15173 switch (sym
->attr
.flavor
)
15176 if (!resolve_fl_variable (sym
, mp_flag
))
15181 if (sym
->formal
&& !sym
->formal_ns
)
15183 /* Check that none of the arguments are a namelist. */
15184 gfc_formal_arglist
*formal
= sym
->formal
;
15186 for (; formal
; formal
= formal
->next
)
15187 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15189 gfc_error ("Namelist %qs can not be an argument to "
15190 "subroutine or function at %L",
15191 formal
->sym
->name
, &sym
->declared_at
);
15196 if (!resolve_fl_procedure (sym
, mp_flag
))
15201 if (!resolve_fl_namelist (sym
))
15206 if (!resolve_fl_parameter (sym
))
15214 /* Resolve array specifier. Check as well some constraints
15215 on COMMON blocks. */
15217 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15219 /* Set the formal_arg_flag so that check_conflict will not throw
15220 an error for host associated variables in the specification
15221 expression for an array_valued function. */
15222 if (sym
->attr
.function
&& sym
->as
)
15223 formal_arg_flag
= true;
15225 saved_specification_expr
= specification_expr
;
15226 specification_expr
= true;
15227 gfc_resolve_array_spec (sym
->as
, check_constant
);
15228 specification_expr
= saved_specification_expr
;
15230 formal_arg_flag
= false;
15232 /* Resolve formal namespaces. */
15233 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15234 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15235 gfc_resolve (sym
->formal_ns
);
15237 /* Make sure the formal namespace is present. */
15238 if (sym
->formal
&& !sym
->formal_ns
)
15240 gfc_formal_arglist
*formal
= sym
->formal
;
15241 while (formal
&& !formal
->sym
)
15242 formal
= formal
->next
;
15246 sym
->formal_ns
= formal
->sym
->ns
;
15247 if (sym
->ns
!= formal
->sym
->ns
)
15248 sym
->formal_ns
->refs
++;
15252 /* Check threadprivate restrictions. */
15253 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15254 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15255 && (!sym
->attr
.in_common
15256 && sym
->module
== NULL
15257 && (sym
->ns
->proc_name
== NULL
15258 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15259 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15261 /* Check omp declare target restrictions. */
15262 if (sym
->attr
.omp_declare_target
15263 && sym
->attr
.flavor
== FL_VARIABLE
15265 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15266 && (!sym
->attr
.in_common
15267 && sym
->module
== NULL
15268 && (sym
->ns
->proc_name
== NULL
15269 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15270 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15271 sym
->name
, &sym
->declared_at
);
15273 /* If we have come this far we can apply default-initializers, as
15274 described in 14.7.5, to those variables that have not already
15275 been assigned one. */
15276 if (sym
->ts
.type
== BT_DERIVED
15278 && !sym
->attr
.allocatable
15279 && !sym
->attr
.alloc_comp
)
15281 symbol_attribute
*a
= &sym
->attr
;
15283 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15284 && !a
->in_common
&& !a
->use_assoc
15286 && !((a
->function
|| a
->result
)
15288 || sym
->ts
.u
.derived
->attr
.alloc_comp
15289 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15290 && !(a
->function
&& sym
!= sym
->result
))
15291 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15292 apply_default_init (sym
);
15293 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15294 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15295 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15296 /* Mark the result symbol to be referenced, when it has allocatable
15298 sym
->result
->attr
.referenced
= 1;
15301 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15302 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15303 && !CLASS_DATA (sym
)->attr
.class_pointer
15304 && !CLASS_DATA (sym
)->attr
.allocatable
)
15305 apply_default_init (sym
);
15307 /* If this symbol has a type-spec, check it. */
15308 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15309 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15310 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15313 if (sym
->param_list
)
15318 /************* Resolve DATA statements *************/
15322 gfc_data_value
*vnode
;
15328 /* Advance the values structure to point to the next value in the data list. */
15331 next_data_value (void)
15333 while (mpz_cmp_ui (values
.left
, 0) == 0)
15336 if (values
.vnode
->next
== NULL
)
15339 values
.vnode
= values
.vnode
->next
;
15340 mpz_set (values
.left
, values
.vnode
->repeat
);
15348 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15354 ar_type mark
= AR_UNKNOWN
;
15356 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15362 if (!gfc_resolve_expr (var
->expr
))
15366 mpz_init_set_si (offset
, 0);
15369 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15370 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15371 e
= e
->value
.function
.actual
->expr
;
15373 if (e
->expr_type
!= EXPR_VARIABLE
)
15374 gfc_internal_error ("check_data_variable(): Bad expression");
15376 sym
= e
->symtree
->n
.sym
;
15378 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15380 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15381 sym
->name
, &sym
->declared_at
);
15384 if (e
->ref
== NULL
&& sym
->as
)
15386 gfc_error ("DATA array %qs at %L must be specified in a previous"
15387 " declaration", sym
->name
, where
);
15391 has_pointer
= sym
->attr
.pointer
;
15393 if (gfc_is_coindexed (e
))
15395 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15400 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15402 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15406 && ref
->type
== REF_ARRAY
15407 && ref
->u
.ar
.type
!= AR_FULL
)
15409 gfc_error ("DATA element %qs at %L is a pointer and so must "
15410 "be a full array", sym
->name
, where
);
15415 if (e
->rank
== 0 || has_pointer
)
15417 mpz_init_set_ui (size
, 1);
15424 /* Find the array section reference. */
15425 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15427 if (ref
->type
!= REF_ARRAY
)
15429 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15435 /* Set marks according to the reference pattern. */
15436 switch (ref
->u
.ar
.type
)
15444 /* Get the start position of array section. */
15445 gfc_get_section_index (ar
, section_index
, &offset
);
15450 gcc_unreachable ();
15453 if (!gfc_array_size (e
, &size
))
15455 gfc_error ("Nonconstant array section at %L in DATA statement",
15457 mpz_clear (offset
);
15464 while (mpz_cmp_ui (size
, 0) > 0)
15466 if (!next_data_value ())
15468 gfc_error ("DATA statement at %L has more variables than values",
15474 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15478 /* If we have more than one element left in the repeat count,
15479 and we have more than one element left in the target variable,
15480 then create a range assignment. */
15481 /* FIXME: Only done for full arrays for now, since array sections
15483 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15484 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15488 if (mpz_cmp (size
, values
.left
) >= 0)
15490 mpz_init_set (range
, values
.left
);
15491 mpz_sub (size
, size
, values
.left
);
15492 mpz_set_ui (values
.left
, 0);
15496 mpz_init_set (range
, size
);
15497 mpz_sub (values
.left
, values
.left
, size
);
15498 mpz_set_ui (size
, 0);
15501 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15504 mpz_add (offset
, offset
, range
);
15511 /* Assign initial value to symbol. */
15514 mpz_sub_ui (values
.left
, values
.left
, 1);
15515 mpz_sub_ui (size
, size
, 1);
15517 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15522 if (mark
== AR_FULL
)
15523 mpz_add_ui (offset
, offset
, 1);
15525 /* Modify the array section indexes and recalculate the offset
15526 for next element. */
15527 else if (mark
== AR_SECTION
)
15528 gfc_advance_section (section_index
, ar
, &offset
);
15532 if (mark
== AR_SECTION
)
15534 for (i
= 0; i
< ar
->dimen
; i
++)
15535 mpz_clear (section_index
[i
]);
15539 mpz_clear (offset
);
15545 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15547 /* Iterate over a list of elements in a DATA statement. */
15550 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15553 iterator_stack frame
;
15554 gfc_expr
*e
, *start
, *end
, *step
;
15555 bool retval
= true;
15557 mpz_init (frame
.value
);
15560 start
= gfc_copy_expr (var
->iter
.start
);
15561 end
= gfc_copy_expr (var
->iter
.end
);
15562 step
= gfc_copy_expr (var
->iter
.step
);
15564 if (!gfc_simplify_expr (start
, 1)
15565 || start
->expr_type
!= EXPR_CONSTANT
)
15567 gfc_error ("start of implied-do loop at %L could not be "
15568 "simplified to a constant value", &start
->where
);
15572 if (!gfc_simplify_expr (end
, 1)
15573 || end
->expr_type
!= EXPR_CONSTANT
)
15575 gfc_error ("end of implied-do loop at %L could not be "
15576 "simplified to a constant value", &start
->where
);
15580 if (!gfc_simplify_expr (step
, 1)
15581 || step
->expr_type
!= EXPR_CONSTANT
)
15583 gfc_error ("step of implied-do loop at %L could not be "
15584 "simplified to a constant value", &start
->where
);
15589 mpz_set (trip
, end
->value
.integer
);
15590 mpz_sub (trip
, trip
, start
->value
.integer
);
15591 mpz_add (trip
, trip
, step
->value
.integer
);
15593 mpz_div (trip
, trip
, step
->value
.integer
);
15595 mpz_set (frame
.value
, start
->value
.integer
);
15597 frame
.prev
= iter_stack
;
15598 frame
.variable
= var
->iter
.var
->symtree
;
15599 iter_stack
= &frame
;
15601 while (mpz_cmp_ui (trip
, 0) > 0)
15603 if (!traverse_data_var (var
->list
, where
))
15609 e
= gfc_copy_expr (var
->expr
);
15610 if (!gfc_simplify_expr (e
, 1))
15617 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15619 mpz_sub_ui (trip
, trip
, 1);
15623 mpz_clear (frame
.value
);
15626 gfc_free_expr (start
);
15627 gfc_free_expr (end
);
15628 gfc_free_expr (step
);
15630 iter_stack
= frame
.prev
;
15635 /* Type resolve variables in the variable list of a DATA statement. */
15638 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15642 for (; var
; var
= var
->next
)
15644 if (var
->expr
== NULL
)
15645 t
= traverse_data_list (var
, where
);
15647 t
= check_data_variable (var
, where
);
15657 /* Resolve the expressions and iterators associated with a data statement.
15658 This is separate from the assignment checking because data lists should
15659 only be resolved once. */
15662 resolve_data_variables (gfc_data_variable
*d
)
15664 for (; d
; d
= d
->next
)
15666 if (d
->list
== NULL
)
15668 if (!gfc_resolve_expr (d
->expr
))
15673 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15676 if (!resolve_data_variables (d
->list
))
15685 /* Resolve a single DATA statement. We implement this by storing a pointer to
15686 the value list into static variables, and then recursively traversing the
15687 variables list, expanding iterators and such. */
15690 resolve_data (gfc_data
*d
)
15693 if (!resolve_data_variables (d
->var
))
15696 values
.vnode
= d
->value
;
15697 if (d
->value
== NULL
)
15698 mpz_set_ui (values
.left
, 0);
15700 mpz_set (values
.left
, d
->value
->repeat
);
15702 if (!traverse_data_var (d
->var
, &d
->where
))
15705 /* At this point, we better not have any values left. */
15707 if (next_data_value ())
15708 gfc_error ("DATA statement at %L has more values than variables",
15713 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15714 accessed by host or use association, is a dummy argument to a pure function,
15715 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15716 is storage associated with any such variable, shall not be used in the
15717 following contexts: (clients of this function). */
15719 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15720 procedure. Returns zero if assignment is OK, nonzero if there is a
15723 gfc_impure_variable (gfc_symbol
*sym
)
15728 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15731 /* Check if the symbol's ns is inside the pure procedure. */
15732 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15736 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15740 proc
= sym
->ns
->proc_name
;
15741 if (sym
->attr
.dummy
15742 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15743 || proc
->attr
.function
))
15746 /* TODO: Sort out what can be storage associated, if anything, and include
15747 it here. In principle equivalences should be scanned but it does not
15748 seem to be possible to storage associate an impure variable this way. */
15753 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15754 current namespace is inside a pure procedure. */
15757 gfc_pure (gfc_symbol
*sym
)
15759 symbol_attribute attr
;
15764 /* Check if the current namespace or one of its parents
15765 belongs to a pure procedure. */
15766 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15768 sym
= ns
->proc_name
;
15772 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15780 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15784 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15785 checks if the current namespace is implicitly pure. Note that this
15786 function returns false for a PURE procedure. */
15789 gfc_implicit_pure (gfc_symbol
*sym
)
15795 /* Check if the current procedure is implicit_pure. Walk up
15796 the procedure list until we find a procedure. */
15797 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15799 sym
= ns
->proc_name
;
15803 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15808 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15809 && !sym
->attr
.pure
;
15814 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15820 /* Check if the current procedure is implicit_pure. Walk up
15821 the procedure list until we find a procedure. */
15822 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15824 sym
= ns
->proc_name
;
15828 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15833 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15834 sym
->attr
.implicit_pure
= 0;
15836 sym
->attr
.pure
= 0;
15840 /* Test whether the current procedure is elemental or not. */
15843 gfc_elemental (gfc_symbol
*sym
)
15845 symbol_attribute attr
;
15848 sym
= gfc_current_ns
->proc_name
;
15853 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15857 /* Warn about unused labels. */
15860 warn_unused_fortran_label (gfc_st_label
*label
)
15865 warn_unused_fortran_label (label
->left
);
15867 if (label
->defined
== ST_LABEL_UNKNOWN
)
15870 switch (label
->referenced
)
15872 case ST_LABEL_UNKNOWN
:
15873 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15874 label
->value
, &label
->where
);
15877 case ST_LABEL_BAD_TARGET
:
15878 gfc_warning (OPT_Wunused_label
,
15879 "Label %d at %L defined but cannot be used",
15880 label
->value
, &label
->where
);
15887 warn_unused_fortran_label (label
->right
);
15891 /* Returns the sequence type of a symbol or sequence. */
15894 sequence_type (gfc_typespec ts
)
15903 if (ts
.u
.derived
->components
== NULL
)
15904 return SEQ_NONDEFAULT
;
15906 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15907 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15908 if (sequence_type (c
->ts
) != result
)
15914 if (ts
.kind
!= gfc_default_character_kind
)
15915 return SEQ_NONDEFAULT
;
15917 return SEQ_CHARACTER
;
15920 if (ts
.kind
!= gfc_default_integer_kind
)
15921 return SEQ_NONDEFAULT
;
15923 return SEQ_NUMERIC
;
15926 if (!(ts
.kind
== gfc_default_real_kind
15927 || ts
.kind
== gfc_default_double_kind
))
15928 return SEQ_NONDEFAULT
;
15930 return SEQ_NUMERIC
;
15933 if (ts
.kind
!= gfc_default_complex_kind
)
15934 return SEQ_NONDEFAULT
;
15936 return SEQ_NUMERIC
;
15939 if (ts
.kind
!= gfc_default_logical_kind
)
15940 return SEQ_NONDEFAULT
;
15942 return SEQ_NUMERIC
;
15945 return SEQ_NONDEFAULT
;
15950 /* Resolve derived type EQUIVALENCE object. */
15953 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15955 gfc_component
*c
= derived
->components
;
15960 /* Shall not be an object of nonsequence derived type. */
15961 if (!derived
->attr
.sequence
)
15963 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15964 "attribute to be an EQUIVALENCE object", sym
->name
,
15969 /* Shall not have allocatable components. */
15970 if (derived
->attr
.alloc_comp
)
15972 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15973 "components to be an EQUIVALENCE object",sym
->name
,
15978 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15980 gfc_error ("Derived type variable %qs at %L with default "
15981 "initialization cannot be in EQUIVALENCE with a variable "
15982 "in COMMON", sym
->name
, &e
->where
);
15986 for (; c
; c
= c
->next
)
15988 if (gfc_bt_struct (c
->ts
.type
)
15989 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15992 /* Shall not be an object of sequence derived type containing a pointer
15993 in the structure. */
15994 if (c
->attr
.pointer
)
15996 gfc_error ("Derived type variable %qs at %L with pointer "
15997 "component(s) cannot be an EQUIVALENCE object",
15998 sym
->name
, &e
->where
);
16006 /* Resolve equivalence object.
16007 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16008 an allocatable array, an object of nonsequence derived type, an object of
16009 sequence derived type containing a pointer at any level of component
16010 selection, an automatic object, a function name, an entry name, a result
16011 name, a named constant, a structure component, or a subobject of any of
16012 the preceding objects. A substring shall not have length zero. A
16013 derived type shall not have components with default initialization nor
16014 shall two objects of an equivalence group be initialized.
16015 Either all or none of the objects shall have an protected attribute.
16016 The simple constraints are done in symbol.c(check_conflict) and the rest
16017 are implemented here. */
16020 resolve_equivalence (gfc_equiv
*eq
)
16023 gfc_symbol
*first_sym
;
16026 locus
*last_where
= NULL
;
16027 seq_type eq_type
, last_eq_type
;
16028 gfc_typespec
*last_ts
;
16029 int object
, cnt_protected
;
16032 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16034 first_sym
= eq
->expr
->symtree
->n
.sym
;
16038 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16042 e
->ts
= e
->symtree
->n
.sym
->ts
;
16043 /* match_varspec might not know yet if it is seeing
16044 array reference or substring reference, as it doesn't
16046 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16048 gfc_ref
*ref
= e
->ref
;
16049 sym
= e
->symtree
->n
.sym
;
16051 if (sym
->attr
.dimension
)
16053 ref
->u
.ar
.as
= sym
->as
;
16057 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16058 if (e
->ts
.type
== BT_CHARACTER
16060 && ref
->type
== REF_ARRAY
16061 && ref
->u
.ar
.dimen
== 1
16062 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16063 && ref
->u
.ar
.stride
[0] == NULL
)
16065 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16066 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16069 /* Optimize away the (:) reference. */
16070 if (start
== NULL
&& end
== NULL
)
16073 e
->ref
= ref
->next
;
16075 e
->ref
->next
= ref
->next
;
16080 ref
->type
= REF_SUBSTRING
;
16082 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16084 ref
->u
.ss
.start
= start
;
16085 if (end
== NULL
&& e
->ts
.u
.cl
)
16086 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16087 ref
->u
.ss
.end
= end
;
16088 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16095 /* Any further ref is an error. */
16098 gcc_assert (ref
->type
== REF_ARRAY
);
16099 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16105 if (!gfc_resolve_expr (e
))
16108 sym
= e
->symtree
->n
.sym
;
16110 if (sym
->attr
.is_protected
)
16112 if (cnt_protected
> 0 && cnt_protected
!= object
)
16114 gfc_error ("Either all or none of the objects in the "
16115 "EQUIVALENCE set at %L shall have the "
16116 "PROTECTED attribute",
16121 /* Shall not equivalence common block variables in a PURE procedure. */
16122 if (sym
->ns
->proc_name
16123 && sym
->ns
->proc_name
->attr
.pure
16124 && sym
->attr
.in_common
)
16126 /* Need to check for symbols that may have entered the pure
16127 procedure via a USE statement. */
16128 bool saw_sym
= false;
16129 if (sym
->ns
->use_stmts
)
16132 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16133 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16139 gfc_error ("COMMON block member %qs at %L cannot be an "
16140 "EQUIVALENCE object in the pure procedure %qs",
16141 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16145 /* Shall not be a named constant. */
16146 if (e
->expr_type
== EXPR_CONSTANT
)
16148 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16149 "object", sym
->name
, &e
->where
);
16153 if (e
->ts
.type
== BT_DERIVED
16154 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16157 /* Check that the types correspond correctly:
16159 A numeric sequence structure may be equivalenced to another sequence
16160 structure, an object of default integer type, default real type, double
16161 precision real type, default logical type such that components of the
16162 structure ultimately only become associated to objects of the same
16163 kind. A character sequence structure may be equivalenced to an object
16164 of default character kind or another character sequence structure.
16165 Other objects may be equivalenced only to objects of the same type and
16166 kind parameters. */
16168 /* Identical types are unconditionally OK. */
16169 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16170 goto identical_types
;
16172 last_eq_type
= sequence_type (*last_ts
);
16173 eq_type
= sequence_type (sym
->ts
);
16175 /* Since the pair of objects is not of the same type, mixed or
16176 non-default sequences can be rejected. */
16178 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16179 "statement at %L with different type objects";
16181 && last_eq_type
== SEQ_MIXED
16182 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16183 || (eq_type
== SEQ_MIXED
16184 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16187 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16188 "statement at %L with objects of different type";
16190 && last_eq_type
== SEQ_NONDEFAULT
16191 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16192 || (eq_type
== SEQ_NONDEFAULT
16193 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16196 msg
="Non-CHARACTER object %qs in default CHARACTER "
16197 "EQUIVALENCE statement at %L";
16198 if (last_eq_type
== SEQ_CHARACTER
16199 && eq_type
!= SEQ_CHARACTER
16200 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16203 msg
="Non-NUMERIC object %qs in default NUMERIC "
16204 "EQUIVALENCE statement at %L";
16205 if (last_eq_type
== SEQ_NUMERIC
16206 && eq_type
!= SEQ_NUMERIC
16207 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16212 last_where
= &e
->where
;
16217 /* Shall not be an automatic array. */
16218 if (e
->ref
->type
== REF_ARRAY
16219 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16221 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16222 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16229 /* Shall not be a structure component. */
16230 if (r
->type
== REF_COMPONENT
)
16232 gfc_error ("Structure component %qs at %L cannot be an "
16233 "EQUIVALENCE object",
16234 r
->u
.c
.component
->name
, &e
->where
);
16238 /* A substring shall not have length zero. */
16239 if (r
->type
== REF_SUBSTRING
)
16241 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16243 gfc_error ("Substring at %L has length zero",
16244 &r
->u
.ss
.start
->where
);
16254 /* Function called by resolve_fntype to flag other symbol used in the
16255 length type parameter specification of function resuls. */
16258 flag_fn_result_spec (gfc_expr
*expr
,
16260 int *f ATTRIBUTE_UNUSED
)
16265 if (expr
->expr_type
== EXPR_VARIABLE
)
16267 s
= expr
->symtree
->n
.sym
;
16268 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16274 gfc_error ("Self reference in character length expression "
16275 "for %qs at %L", sym
->name
, &expr
->where
);
16279 if (!s
->fn_result_spec
16280 && s
->attr
.flavor
== FL_PARAMETER
)
16282 /* Function contained in a module.... */
16283 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16286 s
->fn_result_spec
= 1;
16287 /* Make sure that this symbol is translated as a module
16289 st
= gfc_get_unique_symtree (ns
);
16293 /* ... which is use associated and called. */
16294 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16296 /* External function matched with an interface. */
16299 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16300 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16301 && s
->ns
->proc_name
->attr
.function
))
16302 s
->fn_result_spec
= 1;
16309 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16312 resolve_fntype (gfc_namespace
*ns
)
16314 gfc_entry_list
*el
;
16317 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16320 /* If there are any entries, ns->proc_name is the entry master
16321 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16323 sym
= ns
->entries
->sym
;
16325 sym
= ns
->proc_name
;
16326 if (sym
->result
== sym
16327 && sym
->ts
.type
== BT_UNKNOWN
16328 && !gfc_set_default_type (sym
, 0, NULL
)
16329 && !sym
->attr
.untyped
)
16331 gfc_error ("Function %qs at %L has no IMPLICIT type",
16332 sym
->name
, &sym
->declared_at
);
16333 sym
->attr
.untyped
= 1;
16336 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16337 && !sym
->attr
.contained
16338 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16339 && gfc_check_symbol_access (sym
))
16341 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16342 "%L of PRIVATE type %qs", sym
->name
,
16343 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16347 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16349 if (el
->sym
->result
== el
->sym
16350 && el
->sym
->ts
.type
== BT_UNKNOWN
16351 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16352 && !el
->sym
->attr
.untyped
)
16354 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16355 el
->sym
->name
, &el
->sym
->declared_at
);
16356 el
->sym
->attr
.untyped
= 1;
16360 if (sym
->ts
.type
== BT_CHARACTER
)
16361 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16365 /* 12.3.2.1.1 Defined operators. */
16368 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16370 gfc_formal_arglist
*formal
;
16372 if (!sym
->attr
.function
)
16374 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16375 sym
->name
, &where
);
16379 if (sym
->ts
.type
== BT_CHARACTER
16380 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16381 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16382 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16384 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16385 "character length", sym
->name
, &where
);
16389 formal
= gfc_sym_get_dummy_args (sym
);
16390 if (!formal
|| !formal
->sym
)
16392 gfc_error ("User operator procedure %qs at %L must have at least "
16393 "one argument", sym
->name
, &where
);
16397 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16399 gfc_error ("First argument of operator interface at %L must be "
16400 "INTENT(IN)", &where
);
16404 if (formal
->sym
->attr
.optional
)
16406 gfc_error ("First argument of operator interface at %L cannot be "
16407 "optional", &where
);
16411 formal
= formal
->next
;
16412 if (!formal
|| !formal
->sym
)
16415 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16417 gfc_error ("Second argument of operator interface at %L must be "
16418 "INTENT(IN)", &where
);
16422 if (formal
->sym
->attr
.optional
)
16424 gfc_error ("Second argument of operator interface at %L cannot be "
16425 "optional", &where
);
16431 gfc_error ("Operator interface at %L must have, at most, two "
16432 "arguments", &where
);
16440 gfc_resolve_uops (gfc_symtree
*symtree
)
16442 gfc_interface
*itr
;
16444 if (symtree
== NULL
)
16447 gfc_resolve_uops (symtree
->left
);
16448 gfc_resolve_uops (symtree
->right
);
16450 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16451 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16455 /* Examine all of the expressions associated with a program unit,
16456 assign types to all intermediate expressions, make sure that all
16457 assignments are to compatible types and figure out which names
16458 refer to which functions or subroutines. It doesn't check code
16459 block, which is handled by gfc_resolve_code. */
16462 resolve_types (gfc_namespace
*ns
)
16468 gfc_namespace
* old_ns
= gfc_current_ns
;
16470 if (ns
->types_resolved
)
16473 /* Check that all IMPLICIT types are ok. */
16474 if (!ns
->seen_implicit_none
)
16477 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16478 if (ns
->set_flag
[letter
]
16479 && !resolve_typespec_used (&ns
->default_type
[letter
],
16480 &ns
->implicit_loc
[letter
], NULL
))
16484 gfc_current_ns
= ns
;
16486 resolve_entries (ns
);
16488 resolve_common_vars (&ns
->blank_common
, false);
16489 resolve_common_blocks (ns
->common_root
);
16491 resolve_contained_functions (ns
);
16493 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16494 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16495 resolve_formal_arglist (ns
->proc_name
);
16497 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16499 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16500 resolve_charlen (cl
);
16502 gfc_traverse_ns (ns
, resolve_symbol
);
16504 resolve_fntype (ns
);
16506 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16508 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16509 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16510 "also be PURE", n
->proc_name
->name
,
16511 &n
->proc_name
->declared_at
);
16517 gfc_do_concurrent_flag
= 0;
16518 gfc_check_interfaces (ns
);
16520 gfc_traverse_ns (ns
, resolve_values
);
16526 for (d
= ns
->data
; d
; d
= d
->next
)
16530 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16532 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16534 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16535 resolve_equivalence (eq
);
16537 /* Warn about unused labels. */
16538 if (warn_unused_label
)
16539 warn_unused_fortran_label (ns
->st_labels
);
16541 gfc_resolve_uops (ns
->uop_root
);
16543 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16545 gfc_resolve_omp_declare_simd (ns
);
16547 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16549 ns
->types_resolved
= 1;
16551 gfc_current_ns
= old_ns
;
16555 /* Call gfc_resolve_code recursively. */
16558 resolve_codes (gfc_namespace
*ns
)
16561 bitmap_obstack old_obstack
;
16563 if (ns
->resolved
== 1)
16566 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16569 gfc_current_ns
= ns
;
16571 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16572 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16575 /* Set to an out of range value. */
16576 current_entry_id
= -1;
16578 old_obstack
= labels_obstack
;
16579 bitmap_obstack_initialize (&labels_obstack
);
16581 gfc_resolve_oacc_declare (ns
);
16582 gfc_resolve_omp_local_vars (ns
);
16583 gfc_resolve_code (ns
->code
, ns
);
16585 bitmap_obstack_release (&labels_obstack
);
16586 labels_obstack
= old_obstack
;
16590 /* This function is called after a complete program unit has been compiled.
16591 Its purpose is to examine all of the expressions associated with a program
16592 unit, assign types to all intermediate expressions, make sure that all
16593 assignments are to compatible types and figure out which names refer to
16594 which functions or subroutines. */
16597 gfc_resolve (gfc_namespace
*ns
)
16599 gfc_namespace
*old_ns
;
16600 code_stack
*old_cs_base
;
16601 struct gfc_omp_saved_state old_omp_state
;
16607 old_ns
= gfc_current_ns
;
16608 old_cs_base
= cs_base
;
16610 /* As gfc_resolve can be called during resolution of an OpenMP construct
16611 body, we should clear any state associated to it, so that say NS's
16612 DO loops are not interpreted as OpenMP loops. */
16613 if (!ns
->construct_entities
)
16614 gfc_omp_save_and_clear_state (&old_omp_state
);
16616 resolve_types (ns
);
16617 component_assignment_level
= 0;
16618 resolve_codes (ns
);
16620 gfc_current_ns
= old_ns
;
16621 cs_base
= old_cs_base
;
16624 gfc_run_passes (ns
);
16626 if (!ns
->construct_entities
)
16627 gfc_omp_restore_state (&old_omp_state
);