1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2017 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 gfc_error ("Argument %qs of statement function at %L must "
516 "be scalar", sym
->name
, &sym
->declared_at
);
520 if (sym
->ts
.type
== BT_CHARACTER
)
522 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
523 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
525 gfc_error ("Character-valued argument %qs of statement "
526 "function at %L must have constant length",
527 sym
->name
, &sym
->declared_at
);
533 formal_arg_flag
= false;
537 /* Work function called when searching for symbols that have argument lists
538 associated with them. */
541 find_arglists (gfc_symbol
*sym
)
543 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
544 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
547 resolve_formal_arglist (sym
);
551 /* Given a namespace, resolve all formal argument lists within the namespace.
555 resolve_formal_arglists (gfc_namespace
*ns
)
560 gfc_traverse_ns (ns
, find_arglists
);
565 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
569 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
571 && sym
->ns
->parent
->proc_name
572 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
573 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
574 gfc_error ("Contained procedure %qs at %L has the same name as its "
575 "encompassing procedure", sym
->name
, &sym
->declared_at
);
577 /* If this namespace is not a function or an entry master function,
579 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
580 || sym
->attr
.entry_master
)
583 /* Try to find out of what the return type is. */
584 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
586 t
= gfc_set_default_type (sym
->result
, 0, ns
);
588 if (!t
&& !sym
->result
->attr
.untyped
)
590 if (sym
->result
== sym
)
591 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
592 sym
->name
, &sym
->declared_at
);
593 else if (!sym
->result
->attr
.proc_pointer
)
594 gfc_error ("Result %qs of contained function %qs at %L has "
595 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
596 &sym
->result
->declared_at
);
597 sym
->result
->attr
.untyped
= 1;
601 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
602 type, lists the only ways a character length value of * can be used:
603 dummy arguments of procedures, named constants, and function results
604 in external functions. Internal function results and results of module
605 procedures are not on this list, ergo, not permitted. */
607 if (sym
->result
->ts
.type
== BT_CHARACTER
)
609 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
610 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
612 /* See if this is a module-procedure and adapt error message
615 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
616 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
618 gfc_error (module_proc
619 ? G_("Character-valued module procedure %qs at %L"
620 " must not be assumed length")
621 : G_("Character-valued internal function %qs at %L"
622 " must not be assumed length"),
623 sym
->name
, &sym
->declared_at
);
629 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
630 introduce duplicates. */
633 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
635 gfc_formal_arglist
*f
, *new_arglist
;
638 for (; new_args
!= NULL
; new_args
= new_args
->next
)
640 new_sym
= new_args
->sym
;
641 /* See if this arg is already in the formal argument list. */
642 for (f
= proc
->formal
; f
; f
= f
->next
)
644 if (new_sym
== f
->sym
)
651 /* Add a new argument. Argument order is not important. */
652 new_arglist
= gfc_get_formal_arglist ();
653 new_arglist
->sym
= new_sym
;
654 new_arglist
->next
= proc
->formal
;
655 proc
->formal
= new_arglist
;
660 /* Flag the arguments that are not present in all entries. */
663 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
665 gfc_formal_arglist
*f
, *head
;
668 for (f
= proc
->formal
; f
; f
= f
->next
)
673 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
675 if (new_args
->sym
== f
->sym
)
682 f
->sym
->attr
.not_always_present
= 1;
687 /* Resolve alternate entry points. If a symbol has multiple entry points we
688 create a new master symbol for the main routine, and turn the existing
689 symbol into an entry point. */
692 resolve_entries (gfc_namespace
*ns
)
694 gfc_namespace
*old_ns
;
698 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
699 static int master_count
= 0;
701 if (ns
->proc_name
== NULL
)
704 /* No need to do anything if this procedure doesn't have alternate entry
709 /* We may already have resolved alternate entry points. */
710 if (ns
->proc_name
->attr
.entry_master
)
713 /* If this isn't a procedure something has gone horribly wrong. */
714 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
716 /* Remember the current namespace. */
717 old_ns
= gfc_current_ns
;
721 /* Add the main entry point to the list of entry points. */
722 el
= gfc_get_entry_list ();
723 el
->sym
= ns
->proc_name
;
725 el
->next
= ns
->entries
;
727 ns
->proc_name
->attr
.entry
= 1;
729 /* If it is a module function, it needs to be in the right namespace
730 so that gfc_get_fake_result_decl can gather up the results. The
731 need for this arose in get_proc_name, where these beasts were
732 left in their own namespace, to keep prior references linked to
733 the entry declaration.*/
734 if (ns
->proc_name
->attr
.function
735 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
738 /* Do the same for entries where the master is not a module
739 procedure. These are retained in the module namespace because
740 of the module procedure declaration. */
741 for (el
= el
->next
; el
; el
= el
->next
)
742 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
743 && el
->sym
->attr
.mod_proc
)
747 /* Add an entry statement for it. */
748 c
= gfc_get_code (EXEC_ENTRY
);
753 /* Create a new symbol for the master function. */
754 /* Give the internal function a unique name (within this file).
755 Also include the function name so the user has some hope of figuring
756 out what is going on. */
757 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
758 master_count
++, ns
->proc_name
->name
);
759 gfc_get_ha_symbol (name
, &proc
);
760 gcc_assert (proc
!= NULL
);
762 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
763 if (ns
->proc_name
->attr
.subroutine
)
764 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
768 gfc_typespec
*ts
, *fts
;
769 gfc_array_spec
*as
, *fas
;
770 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
772 fas
= ns
->entries
->sym
->as
;
773 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
774 fts
= &ns
->entries
->sym
->result
->ts
;
775 if (fts
->type
== BT_UNKNOWN
)
776 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
777 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
779 ts
= &el
->sym
->result
->ts
;
781 as
= as
? as
: el
->sym
->result
->as
;
782 if (ts
->type
== BT_UNKNOWN
)
783 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
785 if (! gfc_compare_types (ts
, fts
)
786 || (el
->sym
->result
->attr
.dimension
787 != ns
->entries
->sym
->result
->attr
.dimension
)
788 || (el
->sym
->result
->attr
.pointer
789 != ns
->entries
->sym
->result
->attr
.pointer
))
791 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
792 && gfc_compare_array_spec (as
, fas
) == 0)
793 gfc_error ("Function %s at %L has entries with mismatched "
794 "array specifications", ns
->entries
->sym
->name
,
795 &ns
->entries
->sym
->declared_at
);
796 /* The characteristics need to match and thus both need to have
797 the same string length, i.e. both len=*, or both len=4.
798 Having both len=<variable> is also possible, but difficult to
799 check at compile time. */
800 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
801 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
802 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
804 && ts
->u
.cl
->length
->expr_type
805 != fts
->u
.cl
->length
->expr_type
)
807 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
808 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
809 fts
->u
.cl
->length
->value
.integer
) != 0)))
810 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
811 "entries returning variables of different "
812 "string lengths", ns
->entries
->sym
->name
,
813 &ns
->entries
->sym
->declared_at
);
818 sym
= ns
->entries
->sym
->result
;
819 /* All result types the same. */
821 if (sym
->attr
.dimension
)
822 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
823 if (sym
->attr
.pointer
)
824 gfc_add_pointer (&proc
->attr
, NULL
);
828 /* Otherwise the result will be passed through a union by
830 proc
->attr
.mixed_entry_master
= 1;
831 for (el
= ns
->entries
; el
; el
= el
->next
)
833 sym
= el
->sym
->result
;
834 if (sym
->attr
.dimension
)
836 if (el
== ns
->entries
)
837 gfc_error ("FUNCTION result %s can't be an array in "
838 "FUNCTION %s at %L", sym
->name
,
839 ns
->entries
->sym
->name
, &sym
->declared_at
);
841 gfc_error ("ENTRY result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 else if (sym
->attr
.pointer
)
847 if (el
== ns
->entries
)
848 gfc_error ("FUNCTION result %s can't be a POINTER in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 gfc_error ("ENTRY result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 if (ts
->type
== BT_UNKNOWN
)
860 ts
= gfc_get_default_type (sym
->name
, NULL
);
864 if (ts
->kind
== gfc_default_integer_kind
)
868 if (ts
->kind
== gfc_default_real_kind
869 || ts
->kind
== gfc_default_double_kind
)
873 if (ts
->kind
== gfc_default_complex_kind
)
877 if (ts
->kind
== gfc_default_logical_kind
)
881 /* We will issue error elsewhere. */
889 if (el
== ns
->entries
)
890 gfc_error ("FUNCTION result %s can't be of type %s "
891 "in FUNCTION %s at %L", sym
->name
,
892 gfc_typename (ts
), ns
->entries
->sym
->name
,
895 gfc_error ("ENTRY result %s can't be of type %s "
896 "in FUNCTION %s at %L", sym
->name
,
897 gfc_typename (ts
), ns
->entries
->sym
->name
,
904 proc
->attr
.access
= ACCESS_PRIVATE
;
905 proc
->attr
.entry_master
= 1;
907 /* Merge all the entry point arguments. */
908 for (el
= ns
->entries
; el
; el
= el
->next
)
909 merge_argument_lists (proc
, el
->sym
->formal
);
911 /* Check the master formal arguments for any that are not
912 present in all entry points. */
913 for (el
= ns
->entries
; el
; el
= el
->next
)
914 check_argument_lists (proc
, el
->sym
->formal
);
916 /* Use the master function for the function body. */
917 ns
->proc_name
= proc
;
919 /* Finalize the new symbols. */
920 gfc_commit_symbols ();
922 /* Restore the original namespace. */
923 gfc_current_ns
= old_ns
;
927 /* Resolve common variables. */
929 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
931 gfc_symbol
*csym
= common_block
->head
;
933 for (; csym
; csym
= csym
->common_next
)
935 /* gfc_add_in_common may have been called before, but the reported errors
936 have been ignored to continue parsing.
937 We do the checks again here. */
938 if (!csym
->attr
.use_assoc
)
939 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
941 if (csym
->value
|| csym
->attr
.data
)
943 if (!csym
->ns
->is_block_data
)
944 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
945 "but only in BLOCK DATA initialization is "
946 "allowed", csym
->name
, &csym
->declared_at
);
947 else if (!named_common
)
948 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
949 "in a blank COMMON but initialization is only "
950 "allowed in named common blocks", csym
->name
,
954 if (UNLIMITED_POLY (csym
))
955 gfc_error_now ("%qs in cannot appear in COMMON at %L "
956 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
958 if (csym
->ts
.type
!= BT_DERIVED
)
961 if (!(csym
->ts
.u
.derived
->attr
.sequence
962 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
963 gfc_error_now ("Derived type variable %qs in COMMON at %L "
964 "has neither the SEQUENCE nor the BIND(C) "
965 "attribute", csym
->name
, &csym
->declared_at
);
966 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has an ultimate component that is "
969 "allocatable", csym
->name
, &csym
->declared_at
);
970 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "may not have default initializer", csym
->name
,
975 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
976 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
980 /* Resolve common blocks. */
982 resolve_common_blocks (gfc_symtree
*common_root
)
987 if (common_root
== NULL
)
990 if (common_root
->left
)
991 resolve_common_blocks (common_root
->left
);
992 if (common_root
->right
)
993 resolve_common_blocks (common_root
->right
);
995 resolve_common_vars (common_root
->n
.common
, true);
997 /* The common name is a global name - in Fortran 2003 also if it has a
998 C binding name, since Fortran 2008 only the C binding name is a global
1000 if (!common_root
->n
.common
->binding_label
1001 || gfc_notification_std (GFC_STD_F2008
))
1003 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1004 common_root
->n
.common
->name
);
1006 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1007 && gsym
->type
== GSYM_COMMON
1008 && ((common_root
->n
.common
->binding_label
1009 && (!gsym
->binding_label
1010 || strcmp (common_root
->n
.common
->binding_label
,
1011 gsym
->binding_label
) != 0))
1012 || (!common_root
->n
.common
->binding_label
1013 && gsym
->binding_label
)))
1015 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1016 "identifier and must thus have the same binding name "
1017 "as the same-named COMMON block at %L: %s vs %s",
1018 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1020 common_root
->n
.common
->binding_label
1021 ? common_root
->n
.common
->binding_label
: "(blank)",
1022 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1026 if (gsym
&& gsym
->type
!= GSYM_COMMON
1027 && !common_root
->n
.common
->binding_label
)
1029 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1031 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1035 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1037 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1038 "%L sharing the identifier with global non-COMMON-block "
1039 "entity at %L", common_root
->n
.common
->name
,
1040 &common_root
->n
.common
->where
, &gsym
->where
);
1045 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1046 gsym
->type
= GSYM_COMMON
;
1047 gsym
->where
= common_root
->n
.common
->where
;
1053 if (common_root
->n
.common
->binding_label
)
1055 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1056 common_root
->n
.common
->binding_label
);
1057 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1059 gfc_error ("COMMON block at %L with binding label %s uses the same "
1060 "global identifier as entity at %L",
1061 &common_root
->n
.common
->where
,
1062 common_root
->n
.common
->binding_label
, &gsym
->where
);
1067 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1068 gsym
->type
= GSYM_COMMON
;
1069 gsym
->where
= common_root
->n
.common
->where
;
1075 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1079 if (sym
->attr
.flavor
== FL_PARAMETER
)
1080 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1081 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1083 if (sym
->attr
.external
)
1084 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1085 sym
->name
, &common_root
->n
.common
->where
);
1087 if (sym
->attr
.intrinsic
)
1088 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1089 sym
->name
, &common_root
->n
.common
->where
);
1090 else if (sym
->attr
.result
1091 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1092 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1093 "that is also a function result", sym
->name
,
1094 &common_root
->n
.common
->where
);
1095 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1096 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1097 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1098 "that is also a global procedure", sym
->name
,
1099 &common_root
->n
.common
->where
);
1103 /* Resolve contained function types. Because contained functions can call one
1104 another, they have to be worked out before any of the contained procedures
1107 The good news is that if a function doesn't already have a type, the only
1108 way it can get one is through an IMPLICIT type or a RESULT variable, because
1109 by definition contained functions are contained namespace they're contained
1110 in, not in a sibling or parent namespace. */
1113 resolve_contained_functions (gfc_namespace
*ns
)
1115 gfc_namespace
*child
;
1118 resolve_formal_arglists (ns
);
1120 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1122 /* Resolve alternate entry points first. */
1123 resolve_entries (child
);
1125 /* Then check function return types. */
1126 resolve_contained_fntype (child
->proc_name
, child
);
1127 for (el
= child
->entries
; el
; el
= el
->next
)
1128 resolve_contained_fntype (el
->sym
, child
);
1134 /* A Parameterized Derived Type constructor must contain values for
1135 the PDT KIND parameters or they must have a default initializer.
1136 Go through the constructor picking out the KIND expressions,
1137 storing them in 'param_list' and then call gfc_get_pdt_instance
1138 to obtain the PDT instance. */
1140 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1143 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1145 param
= gfc_get_actual_arglist ();
1147 param_list
= param_tail
= param
;
1150 param_tail
->next
= param
;
1151 param_tail
= param_tail
->next
;
1154 param_tail
->name
= c
->name
;
1156 param_tail
->expr
= gfc_copy_expr (expr
);
1157 else if (c
->initializer
)
1158 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1161 param_tail
->spec_type
= SPEC_ASSUMED
;
1162 if (c
->attr
.pdt_kind
)
1164 gfc_error ("The KIND parameter %qs in the PDT constructor "
1165 "at %C has no value", param
->name
);
1174 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1175 gfc_symbol
*derived
)
1177 gfc_constructor
*cons
;
1178 gfc_component
*comp
;
1181 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1182 cons
= gfc_constructor_first (expr
->value
.constructor
);
1187 comp
= derived
->components
;
1189 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1192 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1193 && comp
->ts
.type
== BT_DERIVED
)
1195 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1199 else if (comp
->ts
.type
== BT_DERIVED
)
1201 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1205 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1206 && derived
->attr
.pdt_template
)
1208 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1217 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1218 static bool resolve_fl_struct (gfc_symbol
*sym
);
1221 /* Resolve all of the elements of a structure constructor and make sure that
1222 the types are correct. The 'init' flag indicates that the given
1223 constructor is an initializer. */
1226 resolve_structure_cons (gfc_expr
*expr
, int init
)
1228 gfc_constructor
*cons
;
1229 gfc_component
*comp
;
1235 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1237 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1238 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1240 resolve_fl_struct (expr
->ts
.u
.derived
);
1242 /* If this is a Parameterized Derived Type template, find the
1243 instance corresponding to the PDT kind parameters. */
1244 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1247 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1250 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1252 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1255 gfc_free_actual_arglist (param_list
);
1257 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1262 cons
= gfc_constructor_first (expr
->value
.constructor
);
1264 /* A constructor may have references if it is the result of substituting a
1265 parameter variable. In this case we just pull out the component we
1268 comp
= expr
->ref
->u
.c
.sym
->components
;
1270 comp
= expr
->ts
.u
.derived
->components
;
1272 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1279 /* Unions use an EXPR_NULL contrived expression to tell the translation
1280 phase to generate an initializer of the appropriate length.
1282 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1285 if (!gfc_resolve_expr (cons
->expr
))
1291 rank
= comp
->as
? comp
->as
->rank
: 0;
1292 if (comp
->ts
.type
== BT_CLASS
&& CLASS_DATA (comp
)->as
)
1293 rank
= CLASS_DATA (comp
)->as
->rank
;
1295 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1296 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1298 gfc_error ("The rank of the element in the structure "
1299 "constructor at %L does not match that of the "
1300 "component (%d/%d)", &cons
->expr
->where
,
1301 cons
->expr
->rank
, rank
);
1305 /* If we don't have the right type, try to convert it. */
1307 if (!comp
->attr
.proc_pointer
&&
1308 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1310 if (strcmp (comp
->name
, "_extends") == 0)
1312 /* Can afford to be brutal with the _extends initializer.
1313 The derived type can get lost because it is PRIVATE
1314 but it is not usage constrained by the standard. */
1315 cons
->expr
->ts
= comp
->ts
;
1317 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1319 gfc_error ("The element in the structure constructor at %L, "
1320 "for pointer component %qs, is %s but should be %s",
1321 &cons
->expr
->where
, comp
->name
,
1322 gfc_basic_typename (cons
->expr
->ts
.type
),
1323 gfc_basic_typename (comp
->ts
.type
));
1328 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1334 /* For strings, the length of the constructor should be the same as
1335 the one of the structure, ensure this if the lengths are known at
1336 compile time and when we are dealing with PARAMETER or structure
1338 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1339 && comp
->ts
.u
.cl
->length
1340 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1341 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1342 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1343 && cons
->expr
->rank
!= 0
1344 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1345 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1347 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1348 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1350 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1351 to make use of the gfc_resolve_character_array_constructor
1352 machinery. The expression is later simplified away to
1353 an array of string literals. */
1354 gfc_expr
*para
= cons
->expr
;
1355 cons
->expr
= gfc_get_expr ();
1356 cons
->expr
->ts
= para
->ts
;
1357 cons
->expr
->where
= para
->where
;
1358 cons
->expr
->expr_type
= EXPR_ARRAY
;
1359 cons
->expr
->rank
= para
->rank
;
1360 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1361 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1362 para
, &cons
->expr
->where
);
1365 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1367 /* Rely on the cleanup of the namespace to deal correctly with
1368 the old charlen. (There was a block here that attempted to
1369 remove the charlen but broke the chain in so doing.) */
1370 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1371 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1372 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1373 gfc_resolve_character_array_constructor (cons
->expr
);
1377 if (cons
->expr
->expr_type
== EXPR_NULL
1378 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1379 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1380 || (comp
->ts
.type
== BT_CLASS
1381 && (CLASS_DATA (comp
)->attr
.class_pointer
1382 || CLASS_DATA (comp
)->attr
.allocatable
))))
1385 gfc_error ("The NULL in the structure constructor at %L is "
1386 "being applied to component %qs, which is neither "
1387 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1391 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1393 /* Check procedure pointer interface. */
1394 gfc_symbol
*s2
= NULL
;
1399 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1402 s2
= c2
->ts
.interface
;
1405 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1407 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1408 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1410 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1412 s2
= cons
->expr
->symtree
->n
.sym
;
1413 name
= cons
->expr
->symtree
->n
.sym
->name
;
1416 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1417 err
, sizeof (err
), NULL
, NULL
))
1419 gfc_error_opt (OPT_Wargument_mismatch
,
1420 "Interface mismatch for procedure-pointer "
1421 "component %qs in structure constructor at %L:"
1422 " %s", comp
->name
, &cons
->expr
->where
, err
);
1427 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1428 || cons
->expr
->expr_type
== EXPR_NULL
)
1431 a
= gfc_expr_attr (cons
->expr
);
1433 if (!a
.pointer
&& !a
.target
)
1436 gfc_error ("The element in the structure constructor at %L, "
1437 "for pointer component %qs should be a POINTER or "
1438 "a TARGET", &cons
->expr
->where
, comp
->name
);
1443 /* F08:C461. Additional checks for pointer initialization. */
1447 gfc_error ("Pointer initialization target at %L "
1448 "must not be ALLOCATABLE", &cons
->expr
->where
);
1453 gfc_error ("Pointer initialization target at %L "
1454 "must have the SAVE attribute", &cons
->expr
->where
);
1458 /* F2003, C1272 (3). */
1459 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1460 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1461 || gfc_is_coindexed (cons
->expr
));
1462 if (impure
&& gfc_pure (NULL
))
1465 gfc_error ("Invalid expression in the structure constructor for "
1466 "pointer component %qs at %L in PURE procedure",
1467 comp
->name
, &cons
->expr
->where
);
1471 gfc_unset_implicit_pure (NULL
);
1478 /****************** Expression name resolution ******************/
1480 /* Returns 0 if a symbol was not declared with a type or
1481 attribute declaration statement, nonzero otherwise. */
1484 was_declared (gfc_symbol
*sym
)
1490 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1493 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1494 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1495 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1496 || a
.asynchronous
|| a
.codimension
)
1503 /* Determine if a symbol is generic or not. */
1506 generic_sym (gfc_symbol
*sym
)
1510 if (sym
->attr
.generic
||
1511 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1514 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1517 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1524 return generic_sym (s
);
1531 /* Determine if a symbol is specific or not. */
1534 specific_sym (gfc_symbol
*sym
)
1538 if (sym
->attr
.if_source
== IFSRC_IFBODY
1539 || sym
->attr
.proc
== PROC_MODULE
1540 || sym
->attr
.proc
== PROC_INTERNAL
1541 || sym
->attr
.proc
== PROC_ST_FUNCTION
1542 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1543 || sym
->attr
.external
)
1546 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1549 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1551 return (s
== NULL
) ? 0 : specific_sym (s
);
1555 /* Figure out if the procedure is specific, generic or unknown. */
1558 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1561 procedure_kind (gfc_symbol
*sym
)
1563 if (generic_sym (sym
))
1564 return PTYPE_GENERIC
;
1566 if (specific_sym (sym
))
1567 return PTYPE_SPECIFIC
;
1569 return PTYPE_UNKNOWN
;
1572 /* Check references to assumed size arrays. The flag need_full_assumed_size
1573 is nonzero when matching actual arguments. */
1575 static int need_full_assumed_size
= 0;
1578 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1580 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1583 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1584 What should it be? */
1585 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1586 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1587 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1589 gfc_error ("The upper bound in the last dimension must "
1590 "appear in the reference to the assumed size "
1591 "array %qs at %L", sym
->name
, &e
->where
);
1598 /* Look for bad assumed size array references in argument expressions
1599 of elemental and array valued intrinsic procedures. Since this is
1600 called from procedure resolution functions, it only recurses at
1604 resolve_assumed_size_actual (gfc_expr
*e
)
1609 switch (e
->expr_type
)
1612 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1617 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1618 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1629 /* Check a generic procedure, passed as an actual argument, to see if
1630 there is a matching specific name. If none, it is an error, and if
1631 more than one, the reference is ambiguous. */
1633 count_specific_procs (gfc_expr
*e
)
1640 sym
= e
->symtree
->n
.sym
;
1642 for (p
= sym
->generic
; p
; p
= p
->next
)
1643 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1645 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1651 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1655 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1656 "argument at %L", sym
->name
, &e
->where
);
1662 /* See if a call to sym could possibly be a not allowed RECURSION because of
1663 a missing RECURSIVE declaration. This means that either sym is the current
1664 context itself, or sym is the parent of a contained procedure calling its
1665 non-RECURSIVE containing procedure.
1666 This also works if sym is an ENTRY. */
1669 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1671 gfc_symbol
* proc_sym
;
1672 gfc_symbol
* context_proc
;
1673 gfc_namespace
* real_context
;
1675 if (sym
->attr
.flavor
== FL_PROGRAM
1676 || gfc_fl_struct (sym
->attr
.flavor
))
1679 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1681 /* If we've got an ENTRY, find real procedure. */
1682 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1683 proc_sym
= sym
->ns
->entries
->sym
;
1687 /* If sym is RECURSIVE, all is well of course. */
1688 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1691 /* Find the context procedure's "real" symbol if it has entries.
1692 We look for a procedure symbol, so recurse on the parents if we don't
1693 find one (like in case of a BLOCK construct). */
1694 for (real_context
= context
; ; real_context
= real_context
->parent
)
1696 /* We should find something, eventually! */
1697 gcc_assert (real_context
);
1699 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1700 : real_context
->proc_name
);
1702 /* In some special cases, there may not be a proc_name, like for this
1704 real(bad_kind()) function foo () ...
1705 when checking the call to bad_kind ().
1706 In these cases, we simply return here and assume that the
1711 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1715 /* A call from sym's body to itself is recursion, of course. */
1716 if (context_proc
== proc_sym
)
1719 /* The same is true if context is a contained procedure and sym the
1721 if (context_proc
->attr
.contained
)
1723 gfc_symbol
* parent_proc
;
1725 gcc_assert (context
->parent
);
1726 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1727 : context
->parent
->proc_name
);
1729 if (parent_proc
== proc_sym
)
1737 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1738 its typespec and formal argument list. */
1741 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1743 gfc_intrinsic_sym
* isym
= NULL
;
1749 /* Already resolved. */
1750 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1753 /* We already know this one is an intrinsic, so we don't call
1754 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1755 gfc_find_subroutine directly to check whether it is a function or
1758 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1760 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1761 isym
= gfc_intrinsic_subroutine_by_id (id
);
1763 else if (sym
->intmod_sym_id
)
1765 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1766 isym
= gfc_intrinsic_function_by_id (id
);
1768 else if (!sym
->attr
.subroutine
)
1769 isym
= gfc_find_function (sym
->name
);
1771 if (isym
&& !sym
->attr
.subroutine
)
1773 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1774 && !sym
->attr
.implicit_type
)
1775 gfc_warning (OPT_Wsurprising
,
1776 "Type specified for intrinsic function %qs at %L is"
1777 " ignored", sym
->name
, &sym
->declared_at
);
1779 if (!sym
->attr
.function
&&
1780 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1785 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1787 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1789 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1790 " specifier", sym
->name
, &sym
->declared_at
);
1794 if (!sym
->attr
.subroutine
&&
1795 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1800 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1805 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1807 sym
->attr
.pure
= isym
->pure
;
1808 sym
->attr
.elemental
= isym
->elemental
;
1810 /* Check it is actually available in the standard settings. */
1811 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1813 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1814 "available in the current standard settings but %s. Use "
1815 "an appropriate %<-std=*%> option or enable "
1816 "%<-fall-intrinsics%> in order to use it.",
1817 sym
->name
, &sym
->declared_at
, symstd
);
1825 /* Resolve a procedure expression, like passing it to a called procedure or as
1826 RHS for a procedure pointer assignment. */
1829 resolve_procedure_expression (gfc_expr
* expr
)
1833 if (expr
->expr_type
!= EXPR_VARIABLE
)
1835 gcc_assert (expr
->symtree
);
1837 sym
= expr
->symtree
->n
.sym
;
1839 if (sym
->attr
.intrinsic
)
1840 gfc_resolve_intrinsic (sym
, &expr
->where
);
1842 if (sym
->attr
.flavor
!= FL_PROCEDURE
1843 || (sym
->attr
.function
&& sym
->result
== sym
))
1846 /* A non-RECURSIVE procedure that is used as procedure expression within its
1847 own body is in danger of being called recursively. */
1848 if (is_illegal_recursion (sym
, gfc_current_ns
))
1849 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1850 " itself recursively. Declare it RECURSIVE or use"
1851 " %<-frecursive%>", sym
->name
, &expr
->where
);
1857 /* Resolve an actual argument list. Most of the time, this is just
1858 resolving the expressions in the list.
1859 The exception is that we sometimes have to decide whether arguments
1860 that look like procedure arguments are really simple variable
1864 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1865 bool no_formal_args
)
1868 gfc_symtree
*parent_st
;
1870 gfc_component
*comp
;
1871 int save_need_full_assumed_size
;
1872 bool return_value
= false;
1873 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1876 first_actual_arg
= true;
1878 for (; arg
; arg
= arg
->next
)
1883 /* Check the label is a valid branching target. */
1886 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1888 gfc_error ("Label %d referenced at %L is never defined",
1889 arg
->label
->value
, &arg
->label
->where
);
1893 first_actual_arg
= false;
1897 if (e
->expr_type
== EXPR_VARIABLE
1898 && e
->symtree
->n
.sym
->attr
.generic
1900 && count_specific_procs (e
) != 1)
1903 if (e
->ts
.type
!= BT_PROCEDURE
)
1905 save_need_full_assumed_size
= need_full_assumed_size
;
1906 if (e
->expr_type
!= EXPR_VARIABLE
)
1907 need_full_assumed_size
= 0;
1908 if (!gfc_resolve_expr (e
))
1910 need_full_assumed_size
= save_need_full_assumed_size
;
1914 /* See if the expression node should really be a variable reference. */
1916 sym
= e
->symtree
->n
.sym
;
1918 if (sym
->attr
.flavor
== FL_PROCEDURE
1919 || sym
->attr
.intrinsic
1920 || sym
->attr
.external
)
1924 /* If a procedure is not already determined to be something else
1925 check if it is intrinsic. */
1926 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1927 sym
->attr
.intrinsic
= 1;
1929 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1931 gfc_error ("Statement function %qs at %L is not allowed as an "
1932 "actual argument", sym
->name
, &e
->where
);
1935 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1936 sym
->attr
.subroutine
);
1937 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1939 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1940 "actual argument", sym
->name
, &e
->where
);
1943 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1944 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1946 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1947 " used as actual argument at %L",
1948 sym
->name
, &e
->where
))
1952 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1954 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1955 "allowed as an actual argument at %L", sym
->name
,
1959 /* Check if a generic interface has a specific procedure
1960 with the same name before emitting an error. */
1961 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1964 /* Just in case a specific was found for the expression. */
1965 sym
= e
->symtree
->n
.sym
;
1967 /* If the symbol is the function that names the current (or
1968 parent) scope, then we really have a variable reference. */
1970 if (gfc_is_function_return_value (sym
, sym
->ns
))
1973 /* If all else fails, see if we have a specific intrinsic. */
1974 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1976 gfc_intrinsic_sym
*isym
;
1978 isym
= gfc_find_function (sym
->name
);
1979 if (isym
== NULL
|| !isym
->specific
)
1981 gfc_error ("Unable to find a specific INTRINSIC procedure "
1982 "for the reference %qs at %L", sym
->name
,
1987 sym
->attr
.intrinsic
= 1;
1988 sym
->attr
.function
= 1;
1991 if (!gfc_resolve_expr (e
))
1996 /* See if the name is a module procedure in a parent unit. */
1998 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2001 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2003 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2007 if (parent_st
== NULL
)
2010 sym
= parent_st
->n
.sym
;
2011 e
->symtree
= parent_st
; /* Point to the right thing. */
2013 if (sym
->attr
.flavor
== FL_PROCEDURE
2014 || sym
->attr
.intrinsic
2015 || sym
->attr
.external
)
2017 if (!gfc_resolve_expr (e
))
2023 e
->expr_type
= EXPR_VARIABLE
;
2025 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2026 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2027 && CLASS_DATA (sym
)->as
))
2029 e
->rank
= sym
->ts
.type
== BT_CLASS
2030 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2031 e
->ref
= gfc_get_ref ();
2032 e
->ref
->type
= REF_ARRAY
;
2033 e
->ref
->u
.ar
.type
= AR_FULL
;
2034 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2035 ? CLASS_DATA (sym
)->as
: sym
->as
;
2038 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2039 primary.c (match_actual_arg). If above code determines that it
2040 is a variable instead, it needs to be resolved as it was not
2041 done at the beginning of this function. */
2042 save_need_full_assumed_size
= need_full_assumed_size
;
2043 if (e
->expr_type
!= EXPR_VARIABLE
)
2044 need_full_assumed_size
= 0;
2045 if (!gfc_resolve_expr (e
))
2047 need_full_assumed_size
= save_need_full_assumed_size
;
2050 /* Check argument list functions %VAL, %LOC and %REF. There is
2051 nothing to do for %REF. */
2052 if (arg
->name
&& arg
->name
[0] == '%')
2054 if (strncmp ("%VAL", arg
->name
, 4) == 0)
2056 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2058 gfc_error ("By-value argument at %L is not of numeric "
2065 gfc_error ("By-value argument at %L cannot be an array or "
2066 "an array section", &e
->where
);
2070 /* Intrinsics are still PROC_UNKNOWN here. However,
2071 since same file external procedures are not resolvable
2072 in gfortran, it is a good deal easier to leave them to
2074 if (ptype
!= PROC_UNKNOWN
2075 && ptype
!= PROC_DUMMY
2076 && ptype
!= PROC_EXTERNAL
2077 && ptype
!= PROC_MODULE
)
2079 gfc_error ("By-value argument at %L is not allowed "
2080 "in this context", &e
->where
);
2085 /* Statement functions have already been excluded above. */
2086 else if (strncmp ("%LOC", arg
->name
, 4) == 0
2087 && e
->ts
.type
== BT_PROCEDURE
)
2089 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2091 gfc_error ("Passing internal procedure at %L by location "
2092 "not allowed", &e
->where
);
2098 comp
= gfc_get_proc_ptr_comp(e
);
2099 if (e
->expr_type
== EXPR_VARIABLE
2100 && comp
&& comp
->attr
.elemental
)
2102 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2103 "allowed as an actual argument at %L", comp
->name
,
2107 /* Fortran 2008, C1237. */
2108 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2109 && gfc_has_ultimate_pointer (e
))
2111 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2112 "component", &e
->where
);
2116 first_actual_arg
= false;
2119 return_value
= true;
2122 actual_arg
= actual_arg_sav
;
2123 first_actual_arg
= first_actual_arg_sav
;
2125 return return_value
;
2129 /* Do the checks of the actual argument list that are specific to elemental
2130 procedures. If called with c == NULL, we have a function, otherwise if
2131 expr == NULL, we have a subroutine. */
2134 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2136 gfc_actual_arglist
*arg0
;
2137 gfc_actual_arglist
*arg
;
2138 gfc_symbol
*esym
= NULL
;
2139 gfc_intrinsic_sym
*isym
= NULL
;
2141 gfc_intrinsic_arg
*iformal
= NULL
;
2142 gfc_formal_arglist
*eformal
= NULL
;
2143 bool formal_optional
= false;
2144 bool set_by_optional
= false;
2148 /* Is this an elemental procedure? */
2149 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2151 if (expr
->value
.function
.esym
!= NULL
2152 && expr
->value
.function
.esym
->attr
.elemental
)
2154 arg0
= expr
->value
.function
.actual
;
2155 esym
= expr
->value
.function
.esym
;
2157 else if (expr
->value
.function
.isym
!= NULL
2158 && expr
->value
.function
.isym
->elemental
)
2160 arg0
= expr
->value
.function
.actual
;
2161 isym
= expr
->value
.function
.isym
;
2166 else if (c
&& c
->ext
.actual
!= NULL
)
2168 arg0
= c
->ext
.actual
;
2170 if (c
->resolved_sym
)
2171 esym
= c
->resolved_sym
;
2173 esym
= c
->symtree
->n
.sym
;
2176 if (!esym
->attr
.elemental
)
2182 /* The rank of an elemental is the rank of its array argument(s). */
2183 for (arg
= arg0
; arg
; arg
= arg
->next
)
2185 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2187 rank
= arg
->expr
->rank
;
2188 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2189 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2190 set_by_optional
= true;
2192 /* Function specific; set the result rank and shape. */
2196 if (!expr
->shape
&& arg
->expr
->shape
)
2198 expr
->shape
= gfc_get_shape (rank
);
2199 for (i
= 0; i
< rank
; i
++)
2200 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2207 /* If it is an array, it shall not be supplied as an actual argument
2208 to an elemental procedure unless an array of the same rank is supplied
2209 as an actual argument corresponding to a nonoptional dummy argument of
2210 that elemental procedure(12.4.1.5). */
2211 formal_optional
= false;
2213 iformal
= isym
->formal
;
2215 eformal
= esym
->formal
;
2217 for (arg
= arg0
; arg
; arg
= arg
->next
)
2221 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2222 formal_optional
= true;
2223 eformal
= eformal
->next
;
2225 else if (isym
&& iformal
)
2227 if (iformal
->optional
)
2228 formal_optional
= true;
2229 iformal
= iformal
->next
;
2232 formal_optional
= true;
2234 if (pedantic
&& arg
->expr
!= NULL
2235 && arg
->expr
->expr_type
== EXPR_VARIABLE
2236 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2239 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2240 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2242 gfc_warning (OPT_Wpedantic
,
2243 "%qs at %L is an array and OPTIONAL; IF IT IS "
2244 "MISSING, it cannot be the actual argument of an "
2245 "ELEMENTAL procedure unless there is a non-optional "
2246 "argument with the same rank (12.4.1.5)",
2247 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2251 for (arg
= arg0
; arg
; arg
= arg
->next
)
2253 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2256 /* Being elemental, the last upper bound of an assumed size array
2257 argument must be present. */
2258 if (resolve_assumed_size_actual (arg
->expr
))
2261 /* Elemental procedure's array actual arguments must conform. */
2264 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2271 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2272 is an array, the intent inout/out variable needs to be also an array. */
2273 if (rank
> 0 && esym
&& expr
== NULL
)
2274 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2275 arg
= arg
->next
, eformal
= eformal
->next
)
2276 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2277 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2278 && arg
->expr
&& arg
->expr
->rank
== 0)
2280 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2281 "ELEMENTAL subroutine %qs is a scalar, but another "
2282 "actual argument is an array", &arg
->expr
->where
,
2283 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2284 : "INOUT", eformal
->sym
->name
, esym
->name
);
2291 /* This function does the checking of references to global procedures
2292 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2293 77 and 95 standards. It checks for a gsymbol for the name, making
2294 one if it does not already exist. If it already exists, then the
2295 reference being resolved must correspond to the type of gsymbol.
2296 Otherwise, the new symbol is equipped with the attributes of the
2297 reference. The corresponding code that is called in creating
2298 global entities is parse.c.
2300 In addition, for all but -std=legacy, the gsymbols are used to
2301 check the interfaces of external procedures from the same file.
2302 The namespace of the gsymbol is resolved and then, once this is
2303 done the interface is checked. */
2307 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2309 if (!gsym_ns
->proc_name
->attr
.recursive
)
2312 if (sym
->ns
== gsym_ns
)
2315 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2322 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2324 if (gsym_ns
->entries
)
2326 gfc_entry_list
*entry
= gsym_ns
->entries
;
2328 for (; entry
; entry
= entry
->next
)
2330 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2332 if (strcmp (gsym_ns
->proc_name
->name
,
2333 sym
->ns
->proc_name
->name
) == 0)
2337 && strcmp (gsym_ns
->proc_name
->name
,
2338 sym
->ns
->parent
->proc_name
->name
) == 0)
2347 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2350 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2352 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2354 for ( ; arg
; arg
= arg
->next
)
2359 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2361 strncpy (errmsg
, _("allocatable argument"), err_len
);
2364 else if (arg
->sym
->attr
.asynchronous
)
2366 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2369 else if (arg
->sym
->attr
.optional
)
2371 strncpy (errmsg
, _("optional argument"), err_len
);
2374 else if (arg
->sym
->attr
.pointer
)
2376 strncpy (errmsg
, _("pointer argument"), err_len
);
2379 else if (arg
->sym
->attr
.target
)
2381 strncpy (errmsg
, _("target argument"), err_len
);
2384 else if (arg
->sym
->attr
.value
)
2386 strncpy (errmsg
, _("value argument"), err_len
);
2389 else if (arg
->sym
->attr
.volatile_
)
2391 strncpy (errmsg
, _("volatile argument"), err_len
);
2394 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2396 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2399 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2401 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2404 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2406 strncpy (errmsg
, _("coarray argument"), err_len
);
2409 else if (false) /* (2d) TODO: parametrized derived type */
2411 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2414 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2416 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2419 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2421 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2424 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2426 /* As assumed-type is unlimited polymorphic (cf. above).
2427 See also TS 29113, Note 6.1. */
2428 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2433 if (sym
->attr
.function
)
2435 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2437 if (res
->attr
.dimension
) /* (3a) */
2439 strncpy (errmsg
, _("array result"), err_len
);
2442 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2444 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2447 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2448 && res
->ts
.u
.cl
->length
2449 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2451 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2456 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2458 strncpy (errmsg
, _("elemental procedure"), err_len
);
2461 else if (sym
->attr
.is_bind_c
) /* (5) */
2463 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2472 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2473 gfc_actual_arglist
**actual
, int sub
)
2477 enum gfc_symbol_type type
;
2480 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2482 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2484 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2485 gfc_global_used (gsym
, where
);
2487 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2488 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2489 && gsym
->type
!= GSYM_UNKNOWN
2490 && !gsym
->binding_label
2492 && gsym
->ns
->resolved
!= -1
2493 && gsym
->ns
->proc_name
2494 && not_in_recursive (sym
, gsym
->ns
)
2495 && not_entry_self_reference (sym
, gsym
->ns
))
2497 gfc_symbol
*def_sym
;
2499 /* Resolve the gsymbol namespace if needed. */
2500 if (!gsym
->ns
->resolved
)
2502 gfc_dt_list
*old_dt_list
;
2504 /* Stash away derived types so that the backend_decls do not
2506 old_dt_list
= gfc_derived_types
;
2507 gfc_derived_types
= NULL
;
2509 gfc_resolve (gsym
->ns
);
2511 /* Store the new derived types with the global namespace. */
2512 if (gfc_derived_types
)
2513 gsym
->ns
->derived_types
= gfc_derived_types
;
2515 /* Restore the derived types of this namespace. */
2516 gfc_derived_types
= old_dt_list
;
2519 /* Make sure that translation for the gsymbol occurs before
2520 the procedure currently being resolved. */
2521 ns
= gfc_global_ns_list
;
2522 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2524 if (ns
->sibling
== gsym
->ns
)
2526 ns
->sibling
= gsym
->ns
->sibling
;
2527 gsym
->ns
->sibling
= gfc_global_ns_list
;
2528 gfc_global_ns_list
= gsym
->ns
;
2533 def_sym
= gsym
->ns
->proc_name
;
2535 /* This can happen if a binding name has been specified. */
2536 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2537 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2539 if (def_sym
->attr
.entry_master
)
2541 gfc_entry_list
*entry
;
2542 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2543 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2545 def_sym
= entry
->sym
;
2550 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2552 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2553 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2554 gfc_typename (&def_sym
->ts
));
2558 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2559 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2561 gfc_error ("Explicit interface required for %qs at %L: %s",
2562 sym
->name
, &sym
->declared_at
, reason
);
2566 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2567 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2568 gfc_errors_to_warnings (true);
2570 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2571 reason
, sizeof(reason
), NULL
, NULL
))
2573 gfc_error_opt (OPT_Wargument_mismatch
,
2574 "Interface mismatch in global procedure %qs at %L:"
2575 " %s", sym
->name
, &sym
->declared_at
, reason
);
2580 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2581 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2582 gfc_errors_to_warnings (true);
2584 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2585 gfc_procedure_use (def_sym
, actual
, where
);
2589 gfc_errors_to_warnings (false);
2591 if (gsym
->type
== GSYM_UNKNOWN
)
2594 gsym
->where
= *where
;
2601 /************* Function resolution *************/
2603 /* Resolve a function call known to be generic.
2604 Section 14.1.2.4.1. */
2607 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2611 if (sym
->attr
.generic
)
2613 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2616 expr
->value
.function
.name
= s
->name
;
2617 expr
->value
.function
.esym
= s
;
2619 if (s
->ts
.type
!= BT_UNKNOWN
)
2621 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2622 expr
->ts
= s
->result
->ts
;
2625 expr
->rank
= s
->as
->rank
;
2626 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2627 expr
->rank
= s
->result
->as
->rank
;
2629 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2634 /* TODO: Need to search for elemental references in generic
2638 if (sym
->attr
.intrinsic
)
2639 return gfc_intrinsic_func_interface (expr
, 0);
2646 resolve_generic_f (gfc_expr
*expr
)
2650 gfc_interface
*intr
= NULL
;
2652 sym
= expr
->symtree
->n
.sym
;
2656 m
= resolve_generic_f0 (expr
, sym
);
2659 else if (m
== MATCH_ERROR
)
2664 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2665 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2668 if (sym
->ns
->parent
== NULL
)
2670 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2674 if (!generic_sym (sym
))
2678 /* Last ditch attempt. See if the reference is to an intrinsic
2679 that possesses a matching interface. 14.1.2.4 */
2680 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2682 if (gfc_init_expr_flag
)
2683 gfc_error ("Function %qs in initialization expression at %L "
2684 "must be an intrinsic function",
2685 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2687 gfc_error ("There is no specific function for the generic %qs "
2688 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2694 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2697 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2699 return resolve_structure_cons (expr
, 0);
2702 m
= gfc_intrinsic_func_interface (expr
, 0);
2707 gfc_error ("Generic function %qs at %L is not consistent with a "
2708 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2715 /* Resolve a function call known to be specific. */
2718 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2722 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2724 if (sym
->attr
.dummy
)
2726 sym
->attr
.proc
= PROC_DUMMY
;
2730 sym
->attr
.proc
= PROC_EXTERNAL
;
2734 if (sym
->attr
.proc
== PROC_MODULE
2735 || sym
->attr
.proc
== PROC_ST_FUNCTION
2736 || sym
->attr
.proc
== PROC_INTERNAL
)
2739 if (sym
->attr
.intrinsic
)
2741 m
= gfc_intrinsic_func_interface (expr
, 1);
2745 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2746 "with an intrinsic", sym
->name
, &expr
->where
);
2754 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2757 expr
->ts
= sym
->result
->ts
;
2760 expr
->value
.function
.name
= sym
->name
;
2761 expr
->value
.function
.esym
= sym
;
2762 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2764 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2766 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2767 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2768 else if (sym
->as
!= NULL
)
2769 expr
->rank
= sym
->as
->rank
;
2776 resolve_specific_f (gfc_expr
*expr
)
2781 sym
= expr
->symtree
->n
.sym
;
2785 m
= resolve_specific_f0 (sym
, expr
);
2788 if (m
== MATCH_ERROR
)
2791 if (sym
->ns
->parent
== NULL
)
2794 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2800 gfc_error ("Unable to resolve the specific function %qs at %L",
2801 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2806 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2807 candidates in CANDIDATES_LEN. */
2810 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2812 size_t &candidates_len
)
2818 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2819 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2820 vec_push (candidates
, candidates_len
, sym
->name
);
2824 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2828 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2832 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2835 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2837 char **candidates
= NULL
;
2838 size_t candidates_len
= 0;
2839 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2840 return gfc_closest_fuzzy_match (fn
, candidates
);
2844 /* Resolve a procedure call not known to be generic nor specific. */
2847 resolve_unknown_f (gfc_expr
*expr
)
2852 sym
= expr
->symtree
->n
.sym
;
2854 if (sym
->attr
.dummy
)
2856 sym
->attr
.proc
= PROC_DUMMY
;
2857 expr
->value
.function
.name
= sym
->name
;
2861 /* See if we have an intrinsic function reference. */
2863 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2865 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2870 /* The reference is to an external name. */
2872 sym
->attr
.proc
= PROC_EXTERNAL
;
2873 expr
->value
.function
.name
= sym
->name
;
2874 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2876 if (sym
->as
!= NULL
)
2877 expr
->rank
= sym
->as
->rank
;
2879 /* Type of the expression is either the type of the symbol or the
2880 default type of the symbol. */
2883 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2885 if (sym
->ts
.type
!= BT_UNKNOWN
)
2889 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2891 if (ts
->type
== BT_UNKNOWN
)
2894 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2896 gfc_error ("Function %qs at %L has no IMPLICIT type"
2897 "; did you mean %qs?",
2898 sym
->name
, &expr
->where
, guessed
);
2900 gfc_error ("Function %qs at %L has no IMPLICIT type",
2901 sym
->name
, &expr
->where
);
2912 /* Return true, if the symbol is an external procedure. */
2914 is_external_proc (gfc_symbol
*sym
)
2916 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2917 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2918 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2919 && !sym
->attr
.proc_pointer
2920 && !sym
->attr
.use_assoc
2928 /* Figure out if a function reference is pure or not. Also set the name
2929 of the function for a potential error message. Return nonzero if the
2930 function is PURE, zero if not. */
2932 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2935 pure_function (gfc_expr
*e
, const char **name
)
2938 gfc_component
*comp
;
2942 if (e
->symtree
!= NULL
2943 && e
->symtree
->n
.sym
!= NULL
2944 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2945 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2947 comp
= gfc_get_proc_ptr_comp (e
);
2950 pure
= gfc_pure (comp
->ts
.interface
);
2953 else if (e
->value
.function
.esym
)
2955 pure
= gfc_pure (e
->value
.function
.esym
);
2956 *name
= e
->value
.function
.esym
->name
;
2958 else if (e
->value
.function
.isym
)
2960 pure
= e
->value
.function
.isym
->pure
2961 || e
->value
.function
.isym
->elemental
;
2962 *name
= e
->value
.function
.isym
->name
;
2966 /* Implicit functions are not pure. */
2968 *name
= e
->value
.function
.name
;
2976 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2977 int *f ATTRIBUTE_UNUSED
)
2981 /* Don't bother recursing into other statement functions
2982 since they will be checked individually for purity. */
2983 if (e
->expr_type
!= EXPR_FUNCTION
2985 || e
->symtree
->n
.sym
== sym
2986 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2989 return pure_function (e
, &name
) ? false : true;
2994 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2996 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3000 /* Check if an impure function is allowed in the current context. */
3002 static bool check_pure_function (gfc_expr
*e
)
3004 const char *name
= NULL
;
3005 if (!pure_function (e
, &name
) && name
)
3009 gfc_error ("Reference to impure function %qs at %L inside a "
3010 "FORALL %s", name
, &e
->where
,
3011 forall_flag
== 2 ? "mask" : "block");
3014 else if (gfc_do_concurrent_flag
)
3016 gfc_error ("Reference to impure function %qs at %L inside a "
3017 "DO CONCURRENT %s", name
, &e
->where
,
3018 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3021 else if (gfc_pure (NULL
))
3023 gfc_error ("Reference to impure function %qs at %L "
3024 "within a PURE procedure", name
, &e
->where
);
3027 gfc_unset_implicit_pure (NULL
);
3033 /* Update current procedure's array_outer_dependency flag, considering
3034 a call to procedure SYM. */
3037 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3039 /* Check to see if this is a sibling function that has not yet
3041 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3042 for (; sibling
; sibling
= sibling
->sibling
)
3044 if (sibling
->proc_name
== sym
)
3046 gfc_resolve (sibling
);
3051 /* If SYM has references to outer arrays, so has the procedure calling
3052 SYM. If SYM is a procedure pointer, we can assume the worst. */
3053 if (sym
->attr
.array_outer_dependency
3054 || sym
->attr
.proc_pointer
)
3055 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3059 /* Resolve a function call, which means resolving the arguments, then figuring
3060 out which entity the name refers to. */
3063 resolve_function (gfc_expr
*expr
)
3065 gfc_actual_arglist
*arg
;
3069 procedure_type p
= PROC_INTRINSIC
;
3070 bool no_formal_args
;
3074 sym
= expr
->symtree
->n
.sym
;
3076 /* If this is a procedure pointer component, it has already been resolved. */
3077 if (gfc_is_proc_ptr_comp (expr
))
3080 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3082 if (sym
&& sym
->attr
.intrinsic
3083 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3084 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3087 if (sym
&& sym
->attr
.intrinsic
3088 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3091 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3093 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3097 /* If this ia a deferred TBP with an abstract interface (which may
3098 of course be referenced), expr->value.function.esym will be set. */
3099 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3101 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3102 sym
->name
, &expr
->where
);
3106 /* Switch off assumed size checking and do this again for certain kinds
3107 of procedure, once the procedure itself is resolved. */
3108 need_full_assumed_size
++;
3110 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3111 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3113 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3114 inquiry_argument
= true;
3115 no_formal_args
= sym
&& is_external_proc (sym
)
3116 && gfc_sym_get_dummy_args (sym
) == NULL
;
3118 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3121 inquiry_argument
= false;
3125 inquiry_argument
= false;
3127 /* Resume assumed_size checking. */
3128 need_full_assumed_size
--;
3130 /* If the procedure is external, check for usage. */
3131 if (sym
&& is_external_proc (sym
))
3132 resolve_global_procedure (sym
, &expr
->where
,
3133 &expr
->value
.function
.actual
, 0);
3135 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3137 && sym
->ts
.u
.cl
->length
== NULL
3139 && !sym
->ts
.deferred
3140 && expr
->value
.function
.esym
== NULL
3141 && !sym
->attr
.contained
)
3143 /* Internal procedures are taken care of in resolve_contained_fntype. */
3144 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3145 "be used at %L since it is not a dummy argument",
3146 sym
->name
, &expr
->where
);
3150 /* See if function is already resolved. */
3152 if (expr
->value
.function
.name
!= NULL
3153 || expr
->value
.function
.isym
!= NULL
)
3155 if (expr
->ts
.type
== BT_UNKNOWN
)
3161 /* Apply the rules of section 14.1.2. */
3163 switch (procedure_kind (sym
))
3166 t
= resolve_generic_f (expr
);
3169 case PTYPE_SPECIFIC
:
3170 t
= resolve_specific_f (expr
);
3174 t
= resolve_unknown_f (expr
);
3178 gfc_internal_error ("resolve_function(): bad function type");
3182 /* If the expression is still a function (it might have simplified),
3183 then we check to see if we are calling an elemental function. */
3185 if (expr
->expr_type
!= EXPR_FUNCTION
)
3188 temp
= need_full_assumed_size
;
3189 need_full_assumed_size
= 0;
3191 if (!resolve_elemental_actual (expr
, NULL
))
3194 if (omp_workshare_flag
3195 && expr
->value
.function
.esym
3196 && ! gfc_elemental (expr
->value
.function
.esym
))
3198 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3199 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3204 #define GENERIC_ID expr->value.function.isym->id
3205 else if (expr
->value
.function
.actual
!= NULL
3206 && expr
->value
.function
.isym
!= NULL
3207 && GENERIC_ID
!= GFC_ISYM_LBOUND
3208 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3209 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3210 && GENERIC_ID
!= GFC_ISYM_LEN
3211 && GENERIC_ID
!= GFC_ISYM_LOC
3212 && GENERIC_ID
!= GFC_ISYM_C_LOC
3213 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3215 /* Array intrinsics must also have the last upper bound of an
3216 assumed size array argument. UBOUND and SIZE have to be
3217 excluded from the check if the second argument is anything
3220 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3222 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3223 && arg
== expr
->value
.function
.actual
3224 && arg
->next
!= NULL
&& arg
->next
->expr
)
3226 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3229 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3232 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3237 if (arg
->expr
!= NULL
3238 && arg
->expr
->rank
> 0
3239 && resolve_assumed_size_actual (arg
->expr
))
3245 need_full_assumed_size
= temp
;
3247 if (!check_pure_function(expr
))
3250 /* Functions without the RECURSIVE attribution are not allowed to
3251 * call themselves. */
3252 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3255 esym
= expr
->value
.function
.esym
;
3257 if (is_illegal_recursion (esym
, gfc_current_ns
))
3259 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3260 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3261 " function %qs is not RECURSIVE",
3262 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3264 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3265 " is not RECURSIVE", esym
->name
, &expr
->where
);
3271 /* Character lengths of use associated functions may contains references to
3272 symbols not referenced from the current program unit otherwise. Make sure
3273 those symbols are marked as referenced. */
3275 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3276 && expr
->value
.function
.esym
->attr
.use_assoc
)
3278 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3281 /* Make sure that the expression has a typespec that works. */
3282 if (expr
->ts
.type
== BT_UNKNOWN
)
3284 if (expr
->symtree
->n
.sym
->result
3285 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3286 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3287 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3290 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3292 if (expr
->value
.function
.esym
)
3293 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3295 update_current_proc_array_outer_dependency (sym
);
3298 /* typebound procedure: Assume the worst. */
3299 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3305 /************* Subroutine resolution *************/
3308 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3315 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3319 else if (gfc_do_concurrent_flag
)
3321 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3325 else if (gfc_pure (NULL
))
3327 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3331 gfc_unset_implicit_pure (NULL
);
3337 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3341 if (sym
->attr
.generic
)
3343 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3346 c
->resolved_sym
= s
;
3347 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3352 /* TODO: Need to search for elemental references in generic interface. */
3355 if (sym
->attr
.intrinsic
)
3356 return gfc_intrinsic_sub_interface (c
, 0);
3363 resolve_generic_s (gfc_code
*c
)
3368 sym
= c
->symtree
->n
.sym
;
3372 m
= resolve_generic_s0 (c
, sym
);
3375 else if (m
== MATCH_ERROR
)
3379 if (sym
->ns
->parent
== NULL
)
3381 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3385 if (!generic_sym (sym
))
3389 /* Last ditch attempt. See if the reference is to an intrinsic
3390 that possesses a matching interface. 14.1.2.4 */
3391 sym
= c
->symtree
->n
.sym
;
3393 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3395 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3396 sym
->name
, &c
->loc
);
3400 m
= gfc_intrinsic_sub_interface (c
, 0);
3404 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3405 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3411 /* Resolve a subroutine call known to be specific. */
3414 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3418 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3420 if (sym
->attr
.dummy
)
3422 sym
->attr
.proc
= PROC_DUMMY
;
3426 sym
->attr
.proc
= PROC_EXTERNAL
;
3430 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3433 if (sym
->attr
.intrinsic
)
3435 m
= gfc_intrinsic_sub_interface (c
, 1);
3439 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3440 "with an intrinsic", sym
->name
, &c
->loc
);
3448 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3450 c
->resolved_sym
= sym
;
3451 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3459 resolve_specific_s (gfc_code
*c
)
3464 sym
= c
->symtree
->n
.sym
;
3468 m
= resolve_specific_s0 (c
, sym
);
3471 if (m
== MATCH_ERROR
)
3474 if (sym
->ns
->parent
== NULL
)
3477 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3483 sym
= c
->symtree
->n
.sym
;
3484 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3485 sym
->name
, &c
->loc
);
3491 /* Resolve a subroutine call not known to be generic nor specific. */
3494 resolve_unknown_s (gfc_code
*c
)
3498 sym
= c
->symtree
->n
.sym
;
3500 if (sym
->attr
.dummy
)
3502 sym
->attr
.proc
= PROC_DUMMY
;
3506 /* See if we have an intrinsic function reference. */
3508 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3510 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3515 /* The reference is to an external name. */
3518 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3520 c
->resolved_sym
= sym
;
3522 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3526 /* Resolve a subroutine call. Although it was tempting to use the same code
3527 for functions, subroutines and functions are stored differently and this
3528 makes things awkward. */
3531 resolve_call (gfc_code
*c
)
3534 procedure_type ptype
= PROC_INTRINSIC
;
3535 gfc_symbol
*csym
, *sym
;
3536 bool no_formal_args
;
3538 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3540 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3542 gfc_error ("%qs at %L has a type, which is not consistent with "
3543 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3547 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3550 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3551 sym
= st
? st
->n
.sym
: NULL
;
3552 if (sym
&& csym
!= sym
3553 && sym
->ns
== gfc_current_ns
3554 && sym
->attr
.flavor
== FL_PROCEDURE
3555 && sym
->attr
.contained
)
3558 if (csym
->attr
.generic
)
3559 c
->symtree
->n
.sym
= sym
;
3562 csym
= c
->symtree
->n
.sym
;
3566 /* If this ia a deferred TBP, c->expr1 will be set. */
3567 if (!c
->expr1
&& csym
)
3569 if (csym
->attr
.abstract
)
3571 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3572 csym
->name
, &c
->loc
);
3576 /* Subroutines without the RECURSIVE attribution are not allowed to
3578 if (is_illegal_recursion (csym
, gfc_current_ns
))
3580 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3581 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3582 "as subroutine %qs is not RECURSIVE",
3583 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3585 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3586 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3592 /* Switch off assumed size checking and do this again for certain kinds
3593 of procedure, once the procedure itself is resolved. */
3594 need_full_assumed_size
++;
3597 ptype
= csym
->attr
.proc
;
3599 no_formal_args
= csym
&& is_external_proc (csym
)
3600 && gfc_sym_get_dummy_args (csym
) == NULL
;
3601 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3604 /* Resume assumed_size checking. */
3605 need_full_assumed_size
--;
3607 /* If external, check for usage. */
3608 if (csym
&& is_external_proc (csym
))
3609 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3612 if (c
->resolved_sym
== NULL
)
3614 c
->resolved_isym
= NULL
;
3615 switch (procedure_kind (csym
))
3618 t
= resolve_generic_s (c
);
3621 case PTYPE_SPECIFIC
:
3622 t
= resolve_specific_s (c
);
3626 t
= resolve_unknown_s (c
);
3630 gfc_internal_error ("resolve_subroutine(): bad function type");
3634 /* Some checks of elemental subroutine actual arguments. */
3635 if (!resolve_elemental_actual (NULL
, c
))
3639 update_current_proc_array_outer_dependency (csym
);
3641 /* Typebound procedure: Assume the worst. */
3642 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3648 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3649 op1->shape and op2->shape are non-NULL return true if their shapes
3650 match. If both op1->shape and op2->shape are non-NULL return false
3651 if their shapes do not match. If either op1->shape or op2->shape is
3652 NULL, return true. */
3655 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3662 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3664 for (i
= 0; i
< op1
->rank
; i
++)
3666 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3668 gfc_error ("Shapes for operands at %L and %L are not conformable",
3669 &op1
->where
, &op2
->where
);
3679 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3680 For example A .AND. B becomes IAND(A, B). */
3682 logical_to_bitwise (gfc_expr
*e
)
3684 gfc_expr
*tmp
, *op1
, *op2
;
3686 gfc_actual_arglist
*args
= NULL
;
3688 gcc_assert (e
->expr_type
== EXPR_OP
);
3690 isym
= GFC_ISYM_NONE
;
3691 op1
= e
->value
.op
.op1
;
3692 op2
= e
->value
.op
.op2
;
3694 switch (e
->value
.op
.op
)
3697 isym
= GFC_ISYM_NOT
;
3700 isym
= GFC_ISYM_IAND
;
3703 isym
= GFC_ISYM_IOR
;
3705 case INTRINSIC_NEQV
:
3706 isym
= GFC_ISYM_IEOR
;
3709 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3710 Change the old expression to NEQV, which will get replaced by IEOR,
3711 and wrap it in NOT. */
3712 tmp
= gfc_copy_expr (e
);
3713 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3714 tmp
= logical_to_bitwise (tmp
);
3715 isym
= GFC_ISYM_NOT
;
3720 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3723 /* Inherit the original operation's operands as arguments. */
3724 args
= gfc_get_actual_arglist ();
3728 args
->next
= gfc_get_actual_arglist ();
3729 args
->next
->expr
= op2
;
3732 /* Convert the expression to a function call. */
3733 e
->expr_type
= EXPR_FUNCTION
;
3734 e
->value
.function
.actual
= args
;
3735 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3736 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3737 e
->value
.function
.esym
= NULL
;
3739 /* Make up a pre-resolved function call symtree if we need to. */
3740 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3743 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3744 sym
= e
->symtree
->n
.sym
;
3746 sym
->attr
.flavor
= FL_PROCEDURE
;
3747 sym
->attr
.function
= 1;
3748 sym
->attr
.elemental
= 1;
3750 sym
->attr
.referenced
= 1;
3751 gfc_intrinsic_symbol (sym
);
3752 gfc_commit_symbol (sym
);
3755 args
->name
= e
->value
.function
.isym
->formal
->name
;
3756 if (e
->value
.function
.isym
->formal
->next
)
3757 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3762 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3763 candidates in CANDIDATES_LEN. */
3765 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3767 size_t &candidates_len
)
3774 /* Not sure how to properly filter here. Use all for a start.
3775 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3776 these as i suppose they don't make terribly sense. */
3778 if (uop
->n
.uop
->op
!= NULL
)
3779 vec_push (candidates
, candidates_len
, uop
->name
);
3783 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3787 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3790 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3793 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3795 char **candidates
= NULL
;
3796 size_t candidates_len
= 0;
3797 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3798 return gfc_closest_fuzzy_match (op
, candidates
);
3802 /* Resolve an operator expression node. This can involve replacing the
3803 operation with a user defined function call. */
3806 resolve_operator (gfc_expr
*e
)
3808 gfc_expr
*op1
, *op2
;
3810 bool dual_locus_error
;
3813 /* Resolve all subnodes-- give them types. */
3815 switch (e
->value
.op
.op
)
3818 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3824 case INTRINSIC_UPLUS
:
3825 case INTRINSIC_UMINUS
:
3826 case INTRINSIC_PARENTHESES
:
3827 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3832 /* Typecheck the new node. */
3834 op1
= e
->value
.op
.op1
;
3835 op2
= e
->value
.op
.op2
;
3836 dual_locus_error
= false;
3838 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3839 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3841 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3845 switch (e
->value
.op
.op
)
3847 case INTRINSIC_UPLUS
:
3848 case INTRINSIC_UMINUS
:
3849 if (op1
->ts
.type
== BT_INTEGER
3850 || op1
->ts
.type
== BT_REAL
3851 || op1
->ts
.type
== BT_COMPLEX
)
3857 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3858 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3861 case INTRINSIC_PLUS
:
3862 case INTRINSIC_MINUS
:
3863 case INTRINSIC_TIMES
:
3864 case INTRINSIC_DIVIDE
:
3865 case INTRINSIC_POWER
:
3866 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3868 gfc_type_convert_binary (e
, 1);
3873 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3874 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3875 gfc_typename (&op2
->ts
));
3878 case INTRINSIC_CONCAT
:
3879 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3880 && op1
->ts
.kind
== op2
->ts
.kind
)
3882 e
->ts
.type
= BT_CHARACTER
;
3883 e
->ts
.kind
= op1
->ts
.kind
;
3888 _("Operands of string concatenation operator at %%L are %s/%s"),
3889 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3895 case INTRINSIC_NEQV
:
3896 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3898 e
->ts
.type
= BT_LOGICAL
;
3899 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3900 if (op1
->ts
.kind
< e
->ts
.kind
)
3901 gfc_convert_type (op1
, &e
->ts
, 2);
3902 else if (op2
->ts
.kind
< e
->ts
.kind
)
3903 gfc_convert_type (op2
, &e
->ts
, 2);
3907 /* Logical ops on integers become bitwise ops with -fdec. */
3909 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3911 e
->ts
.type
= BT_INTEGER
;
3912 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3913 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3914 gfc_convert_type (op1
, &e
->ts
, 1);
3915 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3916 gfc_convert_type (op2
, &e
->ts
, 1);
3917 e
= logical_to_bitwise (e
);
3918 return resolve_function (e
);
3921 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3922 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3923 gfc_typename (&op2
->ts
));
3928 /* Logical ops on integers become bitwise ops with -fdec. */
3929 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3931 e
->ts
.type
= BT_INTEGER
;
3932 e
->ts
.kind
= op1
->ts
.kind
;
3933 e
= logical_to_bitwise (e
);
3934 return resolve_function (e
);
3937 if (op1
->ts
.type
== BT_LOGICAL
)
3939 e
->ts
.type
= BT_LOGICAL
;
3940 e
->ts
.kind
= op1
->ts
.kind
;
3944 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3945 gfc_typename (&op1
->ts
));
3949 case INTRINSIC_GT_OS
:
3951 case INTRINSIC_GE_OS
:
3953 case INTRINSIC_LT_OS
:
3955 case INTRINSIC_LE_OS
:
3956 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3958 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3965 case INTRINSIC_EQ_OS
:
3967 case INTRINSIC_NE_OS
:
3968 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3969 && op1
->ts
.kind
== op2
->ts
.kind
)
3971 e
->ts
.type
= BT_LOGICAL
;
3972 e
->ts
.kind
= gfc_default_logical_kind
;
3976 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3978 gfc_type_convert_binary (e
, 1);
3980 e
->ts
.type
= BT_LOGICAL
;
3981 e
->ts
.kind
= gfc_default_logical_kind
;
3983 if (warn_compare_reals
)
3985 gfc_intrinsic_op op
= e
->value
.op
.op
;
3987 /* Type conversion has made sure that the types of op1 and op2
3988 agree, so it is only necessary to check the first one. */
3989 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3990 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3991 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
3995 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
3996 msg
= "Equality comparison for %s at %L";
3998 msg
= "Inequality comparison for %s at %L";
4000 gfc_warning (OPT_Wcompare_reals
, msg
,
4001 gfc_typename (&op1
->ts
), &op1
->where
);
4008 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4010 _("Logicals at %%L must be compared with %s instead of %s"),
4011 (e
->value
.op
.op
== INTRINSIC_EQ
4012 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4013 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4016 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4017 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4018 gfc_typename (&op2
->ts
));
4022 case INTRINSIC_USER
:
4023 if (e
->value
.op
.uop
->op
== NULL
)
4025 const char *name
= e
->value
.op
.uop
->name
;
4026 const char *guessed
;
4027 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4029 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4032 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4034 else if (op2
== NULL
)
4035 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4036 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4039 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4040 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4041 gfc_typename (&op2
->ts
));
4042 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4047 case INTRINSIC_PARENTHESES
:
4049 if (e
->ts
.type
== BT_CHARACTER
)
4050 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4054 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4057 /* Deal with arrayness of an operand through an operator. */
4061 switch (e
->value
.op
.op
)
4063 case INTRINSIC_PLUS
:
4064 case INTRINSIC_MINUS
:
4065 case INTRINSIC_TIMES
:
4066 case INTRINSIC_DIVIDE
:
4067 case INTRINSIC_POWER
:
4068 case INTRINSIC_CONCAT
:
4072 case INTRINSIC_NEQV
:
4074 case INTRINSIC_EQ_OS
:
4076 case INTRINSIC_NE_OS
:
4078 case INTRINSIC_GT_OS
:
4080 case INTRINSIC_GE_OS
:
4082 case INTRINSIC_LT_OS
:
4084 case INTRINSIC_LE_OS
:
4086 if (op1
->rank
== 0 && op2
->rank
== 0)
4089 if (op1
->rank
== 0 && op2
->rank
!= 0)
4091 e
->rank
= op2
->rank
;
4093 if (e
->shape
== NULL
)
4094 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4097 if (op1
->rank
!= 0 && op2
->rank
== 0)
4099 e
->rank
= op1
->rank
;
4101 if (e
->shape
== NULL
)
4102 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4105 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4107 if (op1
->rank
== op2
->rank
)
4109 e
->rank
= op1
->rank
;
4110 if (e
->shape
== NULL
)
4112 t
= compare_shapes (op1
, op2
);
4116 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4121 /* Allow higher level expressions to work. */
4124 /* Try user-defined operators, and otherwise throw an error. */
4125 dual_locus_error
= true;
4127 _("Inconsistent ranks for operator at %%L and %%L"));
4134 case INTRINSIC_PARENTHESES
:
4136 case INTRINSIC_UPLUS
:
4137 case INTRINSIC_UMINUS
:
4138 /* Simply copy arrayness attribute */
4139 e
->rank
= op1
->rank
;
4141 if (e
->shape
== NULL
)
4142 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4150 /* Attempt to simplify the expression. */
4153 t
= gfc_simplify_expr (e
, 0);
4154 /* Some calls do not succeed in simplification and return false
4155 even though there is no error; e.g. variable references to
4156 PARAMETER arrays. */
4157 if (!gfc_is_constant_expr (e
))
4165 match m
= gfc_extend_expr (e
);
4168 if (m
== MATCH_ERROR
)
4172 if (dual_locus_error
)
4173 gfc_error (msg
, &op1
->where
, &op2
->where
);
4175 gfc_error (msg
, &e
->where
);
4181 /************** Array resolution subroutines **************/
4184 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4186 /* Compare two integer expressions. */
4188 static compare_result
4189 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4193 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4194 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4197 /* If either of the types isn't INTEGER, we must have
4198 raised an error earlier. */
4200 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4203 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4213 /* Compare an integer expression with an integer. */
4215 static compare_result
4216 compare_bound_int (gfc_expr
*a
, int b
)
4220 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4223 if (a
->ts
.type
!= BT_INTEGER
)
4224 gfc_internal_error ("compare_bound_int(): Bad expression");
4226 i
= mpz_cmp_si (a
->value
.integer
, b
);
4236 /* Compare an integer expression with a mpz_t. */
4238 static compare_result
4239 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4243 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4246 if (a
->ts
.type
!= BT_INTEGER
)
4247 gfc_internal_error ("compare_bound_int(): Bad expression");
4249 i
= mpz_cmp (a
->value
.integer
, b
);
4259 /* Compute the last value of a sequence given by a triplet.
4260 Return 0 if it wasn't able to compute the last value, or if the
4261 sequence if empty, and 1 otherwise. */
4264 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4265 gfc_expr
*stride
, mpz_t last
)
4269 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4270 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4271 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4274 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4275 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4278 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4280 if (compare_bound (start
, end
) == CMP_GT
)
4282 mpz_set (last
, end
->value
.integer
);
4286 if (compare_bound_int (stride
, 0) == CMP_GT
)
4288 /* Stride is positive */
4289 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4294 /* Stride is negative */
4295 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4300 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4301 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4302 mpz_sub (last
, end
->value
.integer
, rem
);
4309 /* Compare a single dimension of an array reference to the array
4313 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4317 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4319 gcc_assert (ar
->stride
[i
] == NULL
);
4320 /* This implies [*] as [*:] and [*:3] are not possible. */
4321 if (ar
->start
[i
] == NULL
)
4323 gcc_assert (ar
->end
[i
] == NULL
);
4328 /* Given start, end and stride values, calculate the minimum and
4329 maximum referenced indexes. */
4331 switch (ar
->dimen_type
[i
])
4334 case DIMEN_THIS_IMAGE
:
4339 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4342 gfc_warning (0, "Array reference at %L is out of bounds "
4343 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4344 mpz_get_si (ar
->start
[i
]->value
.integer
),
4345 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4347 gfc_warning (0, "Array reference at %L is out of bounds "
4348 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4349 mpz_get_si (ar
->start
[i
]->value
.integer
),
4350 mpz_get_si (as
->lower
[i
]->value
.integer
),
4354 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4357 gfc_warning (0, "Array reference at %L is out of bounds "
4358 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4359 mpz_get_si (ar
->start
[i
]->value
.integer
),
4360 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4362 gfc_warning (0, "Array reference at %L is out of bounds "
4363 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4364 mpz_get_si (ar
->start
[i
]->value
.integer
),
4365 mpz_get_si (as
->upper
[i
]->value
.integer
),
4374 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4375 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4377 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4379 /* Check for zero stride, which is not allowed. */
4380 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4382 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4386 /* if start == len || (stride > 0 && start < len)
4387 || (stride < 0 && start > len),
4388 then the array section contains at least one element. In this
4389 case, there is an out-of-bounds access if
4390 (start < lower || start > upper). */
4391 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4392 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4393 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4394 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4395 && comp_start_end
== CMP_GT
))
4397 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4399 gfc_warning (0, "Lower array reference at %L is out of bounds "
4400 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4401 mpz_get_si (AR_START
->value
.integer
),
4402 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4405 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4407 gfc_warning (0, "Lower array reference at %L is out of bounds "
4408 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4409 mpz_get_si (AR_START
->value
.integer
),
4410 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4415 /* If we can compute the highest index of the array section,
4416 then it also has to be between lower and upper. */
4417 mpz_init (last_value
);
4418 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4421 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4423 gfc_warning (0, "Upper array reference at %L is out of bounds "
4424 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4425 mpz_get_si (last_value
),
4426 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4427 mpz_clear (last_value
);
4430 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4432 gfc_warning (0, "Upper array reference at %L is out of bounds "
4433 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4434 mpz_get_si (last_value
),
4435 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4436 mpz_clear (last_value
);
4440 mpz_clear (last_value
);
4448 gfc_internal_error ("check_dimension(): Bad array reference");
4455 /* Compare an array reference with an array specification. */
4458 compare_spec_to_ref (gfc_array_ref
*ar
)
4465 /* TODO: Full array sections are only allowed as actual parameters. */
4466 if (as
->type
== AS_ASSUMED_SIZE
4467 && (/*ar->type == AR_FULL
4468 ||*/ (ar
->type
== AR_SECTION
4469 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4471 gfc_error ("Rightmost upper bound of assumed size array section "
4472 "not specified at %L", &ar
->where
);
4476 if (ar
->type
== AR_FULL
)
4479 if (as
->rank
!= ar
->dimen
)
4481 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4482 &ar
->where
, ar
->dimen
, as
->rank
);
4486 /* ar->codimen == 0 is a local array. */
4487 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4489 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4490 &ar
->where
, ar
->codimen
, as
->corank
);
4494 for (i
= 0; i
< as
->rank
; i
++)
4495 if (!check_dimension (i
, ar
, as
))
4498 /* Local access has no coarray spec. */
4499 if (ar
->codimen
!= 0)
4500 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4502 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4503 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4505 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4506 i
+ 1 - as
->rank
, &ar
->where
);
4509 if (!check_dimension (i
, ar
, as
))
4517 /* Resolve one part of an array index. */
4520 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4521 int force_index_integer_kind
)
4528 if (!gfc_resolve_expr (index
))
4531 if (check_scalar
&& index
->rank
!= 0)
4533 gfc_error ("Array index at %L must be scalar", &index
->where
);
4537 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4539 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4540 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4544 if (index
->ts
.type
== BT_REAL
)
4545 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4549 if ((index
->ts
.kind
!= gfc_index_integer_kind
4550 && force_index_integer_kind
)
4551 || index
->ts
.type
!= BT_INTEGER
)
4554 ts
.type
= BT_INTEGER
;
4555 ts
.kind
= gfc_index_integer_kind
;
4557 gfc_convert_type_warn (index
, &ts
, 2, 0);
4563 /* Resolve one part of an array index. */
4566 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4568 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4571 /* Resolve a dim argument to an intrinsic function. */
4574 gfc_resolve_dim_arg (gfc_expr
*dim
)
4579 if (!gfc_resolve_expr (dim
))
4584 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4589 if (dim
->ts
.type
!= BT_INTEGER
)
4591 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4595 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4600 ts
.type
= BT_INTEGER
;
4601 ts
.kind
= gfc_index_integer_kind
;
4603 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4609 /* Given an expression that contains array references, update those array
4610 references to point to the right array specifications. While this is
4611 filled in during matching, this information is difficult to save and load
4612 in a module, so we take care of it here.
4614 The idea here is that the original array reference comes from the
4615 base symbol. We traverse the list of reference structures, setting
4616 the stored reference to references. Component references can
4617 provide an additional array specification. */
4620 find_array_spec (gfc_expr
*e
)
4626 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4627 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4629 as
= e
->symtree
->n
.sym
->as
;
4631 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4636 gfc_internal_error ("find_array_spec(): Missing spec");
4643 c
= ref
->u
.c
.component
;
4644 if (c
->attr
.dimension
)
4647 gfc_internal_error ("find_array_spec(): unused as(1)");
4658 gfc_internal_error ("find_array_spec(): unused as(2)");
4662 /* Resolve an array reference. */
4665 resolve_array_ref (gfc_array_ref
*ar
)
4667 int i
, check_scalar
;
4670 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4672 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4674 /* Do not force gfc_index_integer_kind for the start. We can
4675 do fine with any integer kind. This avoids temporary arrays
4676 created for indexing with a vector. */
4677 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4679 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4681 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4686 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4690 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4694 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4695 if (e
->expr_type
== EXPR_VARIABLE
4696 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4697 ar
->start
[i
] = gfc_get_parentheses (e
);
4701 gfc_error ("Array index at %L is an array of rank %d",
4702 &ar
->c_where
[i
], e
->rank
);
4706 /* Fill in the upper bound, which may be lower than the
4707 specified one for something like a(2:10:5), which is
4708 identical to a(2:7:5). Only relevant for strides not equal
4709 to one. Don't try a division by zero. */
4710 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4711 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4712 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4713 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4717 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4719 if (ar
->end
[i
] == NULL
)
4722 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4724 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4726 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4727 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4729 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4740 if (ar
->type
== AR_FULL
)
4742 if (ar
->as
->rank
== 0)
4743 ar
->type
= AR_ELEMENT
;
4745 /* Make sure array is the same as array(:,:), this way
4746 we don't need to special case all the time. */
4747 ar
->dimen
= ar
->as
->rank
;
4748 for (i
= 0; i
< ar
->dimen
; i
++)
4750 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4752 gcc_assert (ar
->start
[i
] == NULL
);
4753 gcc_assert (ar
->end
[i
] == NULL
);
4754 gcc_assert (ar
->stride
[i
] == NULL
);
4758 /* If the reference type is unknown, figure out what kind it is. */
4760 if (ar
->type
== AR_UNKNOWN
)
4762 ar
->type
= AR_ELEMENT
;
4763 for (i
= 0; i
< ar
->dimen
; i
++)
4764 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4765 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4767 ar
->type
= AR_SECTION
;
4772 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4775 if (ar
->as
->corank
&& ar
->codimen
== 0)
4778 ar
->codimen
= ar
->as
->corank
;
4779 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4780 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4788 resolve_substring (gfc_ref
*ref
)
4790 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4792 if (ref
->u
.ss
.start
!= NULL
)
4794 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4797 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4799 gfc_error ("Substring start index at %L must be of type INTEGER",
4800 &ref
->u
.ss
.start
->where
);
4804 if (ref
->u
.ss
.start
->rank
!= 0)
4806 gfc_error ("Substring start index at %L must be scalar",
4807 &ref
->u
.ss
.start
->where
);
4811 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4812 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4813 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4815 gfc_error ("Substring start index at %L is less than one",
4816 &ref
->u
.ss
.start
->where
);
4821 if (ref
->u
.ss
.end
!= NULL
)
4823 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4826 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4828 gfc_error ("Substring end index at %L must be of type INTEGER",
4829 &ref
->u
.ss
.end
->where
);
4833 if (ref
->u
.ss
.end
->rank
!= 0)
4835 gfc_error ("Substring end index at %L must be scalar",
4836 &ref
->u
.ss
.end
->where
);
4840 if (ref
->u
.ss
.length
!= NULL
4841 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4842 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4843 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4845 gfc_error ("Substring end index at %L exceeds the string length",
4846 &ref
->u
.ss
.start
->where
);
4850 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4851 gfc_integer_kinds
[k
].huge
) == CMP_GT
4852 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4853 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4855 gfc_error ("Substring end index at %L is too large",
4856 &ref
->u
.ss
.end
->where
);
4865 /* This function supplies missing substring charlens. */
4868 gfc_resolve_substring_charlen (gfc_expr
*e
)
4871 gfc_expr
*start
, *end
;
4872 gfc_typespec
*ts
= NULL
;
4874 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4876 if (char_ref
->type
== REF_SUBSTRING
)
4878 if (char_ref
->type
== REF_COMPONENT
)
4879 ts
= &char_ref
->u
.c
.component
->ts
;
4885 gcc_assert (char_ref
->next
== NULL
);
4889 if (e
->ts
.u
.cl
->length
)
4890 gfc_free_expr (e
->ts
.u
.cl
->length
);
4891 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4895 e
->ts
.type
= BT_CHARACTER
;
4896 e
->ts
.kind
= gfc_default_character_kind
;
4899 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4901 if (char_ref
->u
.ss
.start
)
4902 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4904 start
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
4906 if (char_ref
->u
.ss
.end
)
4907 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4908 else if (e
->expr_type
== EXPR_VARIABLE
)
4911 ts
= &e
->symtree
->n
.sym
->ts
;
4912 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4919 gfc_free_expr (start
);
4920 gfc_free_expr (end
);
4924 /* Length = (end - start + 1). */
4925 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4926 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4927 gfc_get_int_expr (gfc_default_integer_kind
,
4930 /* F2008, 6.4.1: Both the starting point and the ending point shall
4931 be within the range 1, 2, ..., n unless the starting point exceeds
4932 the ending point, in which case the substring has length zero. */
4934 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4935 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4937 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4938 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4940 /* Make sure that the length is simplified. */
4941 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4942 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4946 /* Resolve subtype references. */
4949 resolve_ref (gfc_expr
*expr
)
4951 int current_part_dimension
, n_components
, seen_part_dimension
;
4954 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4955 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4957 find_array_spec (expr
);
4961 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4965 if (!resolve_array_ref (&ref
->u
.ar
))
4973 if (!resolve_substring (ref
))
4978 /* Check constraints on part references. */
4980 current_part_dimension
= 0;
4981 seen_part_dimension
= 0;
4984 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4989 switch (ref
->u
.ar
.type
)
4992 /* Coarray scalar. */
4993 if (ref
->u
.ar
.as
->rank
== 0)
4995 current_part_dimension
= 0;
5000 current_part_dimension
= 1;
5004 current_part_dimension
= 0;
5008 gfc_internal_error ("resolve_ref(): Bad array reference");
5014 if (current_part_dimension
|| seen_part_dimension
)
5017 if (ref
->u
.c
.component
->attr
.pointer
5018 || ref
->u
.c
.component
->attr
.proc_pointer
5019 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5020 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5022 gfc_error ("Component to the right of a part reference "
5023 "with nonzero rank must not have the POINTER "
5024 "attribute at %L", &expr
->where
);
5027 else if (ref
->u
.c
.component
->attr
.allocatable
5028 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5029 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5032 gfc_error ("Component to the right of a part reference "
5033 "with nonzero rank must not have the ALLOCATABLE "
5034 "attribute at %L", &expr
->where
);
5046 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5047 || ref
->next
== NULL
)
5048 && current_part_dimension
5049 && seen_part_dimension
)
5051 gfc_error ("Two or more part references with nonzero rank must "
5052 "not be specified at %L", &expr
->where
);
5056 if (ref
->type
== REF_COMPONENT
)
5058 if (current_part_dimension
)
5059 seen_part_dimension
= 1;
5061 /* reset to make sure */
5062 current_part_dimension
= 0;
5070 /* Given an expression, determine its shape. This is easier than it sounds.
5071 Leaves the shape array NULL if it is not possible to determine the shape. */
5074 expression_shape (gfc_expr
*e
)
5076 mpz_t array
[GFC_MAX_DIMENSIONS
];
5079 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5082 for (i
= 0; i
< e
->rank
; i
++)
5083 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5086 e
->shape
= gfc_get_shape (e
->rank
);
5088 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5093 for (i
--; i
>= 0; i
--)
5094 mpz_clear (array
[i
]);
5098 /* Given a variable expression node, compute the rank of the expression by
5099 examining the base symbol and any reference structures it may have. */
5102 expression_rank (gfc_expr
*e
)
5107 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5108 could lead to serious confusion... */
5109 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5113 if (e
->expr_type
== EXPR_ARRAY
)
5115 /* Constructors can have a rank different from one via RESHAPE(). */
5117 if (e
->symtree
== NULL
)
5123 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5124 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5130 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5132 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5133 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5134 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5136 if (ref
->type
!= REF_ARRAY
)
5139 if (ref
->u
.ar
.type
== AR_FULL
)
5141 rank
= ref
->u
.ar
.as
->rank
;
5145 if (ref
->u
.ar
.type
== AR_SECTION
)
5147 /* Figure out the rank of the section. */
5149 gfc_internal_error ("expression_rank(): Two array specs");
5151 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5152 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5153 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5163 expression_shape (e
);
5168 add_caf_get_intrinsic (gfc_expr
*e
)
5170 gfc_expr
*wrapper
, *tmp_expr
;
5174 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5175 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5180 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5181 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5184 tmp_expr
= XCNEW (gfc_expr
);
5186 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5187 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5188 wrapper
->ts
= e
->ts
;
5189 wrapper
->rank
= e
->rank
;
5191 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5198 remove_caf_get_intrinsic (gfc_expr
*e
)
5200 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5201 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5202 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5203 e
->value
.function
.actual
->expr
= NULL
;
5204 gfc_free_actual_arglist (e
->value
.function
.actual
);
5205 gfc_free_shape (&e
->shape
, e
->rank
);
5211 /* Resolve a variable expression. */
5214 resolve_variable (gfc_expr
*e
)
5221 if (e
->symtree
== NULL
)
5223 sym
= e
->symtree
->n
.sym
;
5225 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5226 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5227 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5229 if (!actual_arg
|| inquiry_argument
)
5231 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5232 "be used as actual argument", sym
->name
, &e
->where
);
5236 /* TS 29113, 407b. */
5237 else if (e
->ts
.type
== BT_ASSUMED
)
5241 gfc_error ("Assumed-type variable %s at %L may only be used "
5242 "as actual argument", sym
->name
, &e
->where
);
5245 else if (inquiry_argument
&& !first_actual_arg
)
5247 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5248 for all inquiry functions in resolve_function; the reason is
5249 that the function-name resolution happens too late in that
5251 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5252 "an inquiry function shall be the first argument",
5253 sym
->name
, &e
->where
);
5257 /* TS 29113, C535b. */
5258 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5259 && CLASS_DATA (sym
)->as
5260 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5261 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5262 && sym
->as
->type
== AS_ASSUMED_RANK
))
5266 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5267 "actual argument", sym
->name
, &e
->where
);
5270 else if (inquiry_argument
&& !first_actual_arg
)
5272 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5273 for all inquiry functions in resolve_function; the reason is
5274 that the function-name resolution happens too late in that
5276 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5277 "to an inquiry function shall be the first argument",
5278 sym
->name
, &e
->where
);
5283 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5284 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5285 && e
->ref
->next
== NULL
))
5287 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5288 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5291 /* TS 29113, 407b. */
5292 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5293 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5294 && e
->ref
->next
== NULL
))
5296 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5297 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5301 /* TS 29113, C535b. */
5302 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5303 && CLASS_DATA (sym
)->as
5304 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5305 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5306 && sym
->as
->type
== AS_ASSUMED_RANK
))
5308 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5309 && e
->ref
->next
== NULL
))
5311 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5312 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5316 /* For variables that are used in an associate (target => object) where
5317 the object's basetype is array valued while the target is scalar,
5318 the ts' type of the component refs is still array valued, which
5319 can't be translated that way. */
5320 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5321 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5322 && CLASS_DATA (sym
->assoc
->target
)->as
)
5324 gfc_ref
*ref
= e
->ref
;
5330 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5331 /* Stop the loop. */
5341 /* If this is an associate-name, it may be parsed with an array reference
5342 in error even though the target is scalar. Fail directly in this case.
5343 TODO Understand why class scalar expressions must be excluded. */
5344 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5346 if (sym
->ts
.type
== BT_CLASS
)
5347 gfc_fix_class_refs (e
);
5348 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5352 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5353 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5355 /* On the other hand, the parser may not have known this is an array;
5356 in this case, we have to add a FULL reference. */
5357 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5359 e
->ref
= gfc_get_ref ();
5360 e
->ref
->type
= REF_ARRAY
;
5361 e
->ref
->u
.ar
.type
= AR_FULL
;
5362 e
->ref
->u
.ar
.dimen
= 0;
5365 /* Like above, but for class types, where the checking whether an array
5366 ref is present is more complicated. Furthermore make sure not to add
5367 the full array ref to _vptr or _len refs. */
5368 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5369 && CLASS_DATA (sym
)->attr
.dimension
5370 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5372 gfc_ref
*ref
, *newref
;
5374 newref
= gfc_get_ref ();
5375 newref
->type
= REF_ARRAY
;
5376 newref
->u
.ar
.type
= AR_FULL
;
5377 newref
->u
.ar
.dimen
= 0;
5378 /* Because this is an associate var and the first ref either is a ref to
5379 the _data component or not, no traversal of the ref chain is
5380 needed. The array ref needs to be inserted after the _data ref,
5381 or when that is not present, which may happend for polymorphic
5382 types, then at the first position. */
5386 else if (ref
->type
== REF_COMPONENT
5387 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5389 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5391 newref
->next
= ref
->next
;
5395 /* Array ref present already. */
5396 gfc_free_ref_list (newref
);
5398 else if (ref
->type
== REF_ARRAY
)
5399 /* Array ref present already. */
5400 gfc_free_ref_list (newref
);
5408 if (e
->ref
&& !resolve_ref (e
))
5411 if (sym
->attr
.flavor
== FL_PROCEDURE
5412 && (!sym
->attr
.function
5413 || (sym
->attr
.function
&& sym
->result
5414 && sym
->result
->attr
.proc_pointer
5415 && !sym
->result
->attr
.function
)))
5417 e
->ts
.type
= BT_PROCEDURE
;
5418 goto resolve_procedure
;
5421 if (sym
->ts
.type
!= BT_UNKNOWN
)
5422 gfc_variable_attr (e
, &e
->ts
);
5423 else if (sym
->attr
.flavor
== FL_PROCEDURE
5424 && sym
->attr
.function
&& sym
->result
5425 && sym
->result
->ts
.type
!= BT_UNKNOWN
5426 && sym
->result
->attr
.proc_pointer
)
5427 e
->ts
= sym
->result
->ts
;
5430 /* Must be a simple variable reference. */
5431 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5436 if (check_assumed_size_reference (sym
, e
))
5439 /* Deal with forward references to entries during gfc_resolve_code, to
5440 satisfy, at least partially, 12.5.2.5. */
5441 if (gfc_current_ns
->entries
5442 && current_entry_id
== sym
->entry_id
5445 && cs_base
->current
->op
!= EXEC_ENTRY
)
5447 gfc_entry_list
*entry
;
5448 gfc_formal_arglist
*formal
;
5450 bool seen
, saved_specification_expr
;
5452 /* If the symbol is a dummy... */
5453 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5455 entry
= gfc_current_ns
->entries
;
5458 /* ...test if the symbol is a parameter of previous entries. */
5459 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5460 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5462 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5469 /* If it has not been seen as a dummy, this is an error. */
5472 if (specification_expr
)
5473 gfc_error ("Variable %qs, used in a specification expression"
5474 ", is referenced at %L before the ENTRY statement "
5475 "in which it is a parameter",
5476 sym
->name
, &cs_base
->current
->loc
);
5478 gfc_error ("Variable %qs is used at %L before the ENTRY "
5479 "statement in which it is a parameter",
5480 sym
->name
, &cs_base
->current
->loc
);
5485 /* Now do the same check on the specification expressions. */
5486 saved_specification_expr
= specification_expr
;
5487 specification_expr
= true;
5488 if (sym
->ts
.type
== BT_CHARACTER
5489 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5493 for (n
= 0; n
< sym
->as
->rank
; n
++)
5495 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5497 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5500 specification_expr
= saved_specification_expr
;
5503 /* Update the symbol's entry level. */
5504 sym
->entry_id
= current_entry_id
+ 1;
5507 /* If a symbol has been host_associated mark it. This is used latter,
5508 to identify if aliasing is possible via host association. */
5509 if (sym
->attr
.flavor
== FL_VARIABLE
5510 && gfc_current_ns
->parent
5511 && (gfc_current_ns
->parent
== sym
->ns
5512 || (gfc_current_ns
->parent
->parent
5513 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5514 sym
->attr
.host_assoc
= 1;
5516 if (gfc_current_ns
->proc_name
5517 && sym
->attr
.dimension
5518 && (sym
->ns
!= gfc_current_ns
5519 || sym
->attr
.use_assoc
5520 || sym
->attr
.in_common
))
5521 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5524 if (t
&& !resolve_procedure_expression (e
))
5527 /* F2008, C617 and C1229. */
5528 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5529 && gfc_is_coindexed (e
))
5531 gfc_ref
*ref
, *ref2
= NULL
;
5533 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5535 if (ref
->type
== REF_COMPONENT
)
5537 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5541 for ( ; ref
; ref
= ref
->next
)
5542 if (ref
->type
== REF_COMPONENT
)
5545 /* Expression itself is not coindexed object. */
5546 if (ref
&& e
->ts
.type
== BT_CLASS
)
5548 gfc_error ("Polymorphic subobject of coindexed object at %L",
5553 /* Expression itself is coindexed object. */
5557 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5558 for ( ; c
; c
= c
->next
)
5559 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5561 gfc_error ("Coindexed object with polymorphic allocatable "
5562 "subcomponent at %L", &e
->where
);
5570 expression_rank (e
);
5572 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5573 add_caf_get_intrinsic (e
);
5579 /* Checks to see that the correct symbol has been host associated.
5580 The only situation where this arises is that in which a twice
5581 contained function is parsed after the host association is made.
5582 Therefore, on detecting this, change the symbol in the expression
5583 and convert the array reference into an actual arglist if the old
5584 symbol is a variable. */
5586 check_host_association (gfc_expr
*e
)
5588 gfc_symbol
*sym
, *old_sym
;
5592 gfc_actual_arglist
*arg
, *tail
= NULL
;
5593 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5595 /* If the expression is the result of substitution in
5596 interface.c(gfc_extend_expr) because there is no way in
5597 which the host association can be wrong. */
5598 if (e
->symtree
== NULL
5599 || e
->symtree
->n
.sym
== NULL
5600 || e
->user_operator
)
5603 old_sym
= e
->symtree
->n
.sym
;
5605 if (gfc_current_ns
->parent
5606 && old_sym
->ns
!= gfc_current_ns
)
5608 /* Use the 'USE' name so that renamed module symbols are
5609 correctly handled. */
5610 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5612 if (sym
&& old_sym
!= sym
5613 && sym
->ts
.type
== old_sym
->ts
.type
5614 && sym
->attr
.flavor
== FL_PROCEDURE
5615 && sym
->attr
.contained
)
5617 /* Clear the shape, since it might not be valid. */
5618 gfc_free_shape (&e
->shape
, e
->rank
);
5620 /* Give the expression the right symtree! */
5621 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5622 gcc_assert (st
!= NULL
);
5624 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5625 || e
->expr_type
== EXPR_FUNCTION
)
5627 /* Original was function so point to the new symbol, since
5628 the actual argument list is already attached to the
5630 e
->value
.function
.esym
= NULL
;
5635 /* Original was variable so convert array references into
5636 an actual arglist. This does not need any checking now
5637 since resolve_function will take care of it. */
5638 e
->value
.function
.actual
= NULL
;
5639 e
->expr_type
= EXPR_FUNCTION
;
5642 /* Ambiguity will not arise if the array reference is not
5643 the last reference. */
5644 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5645 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5648 gcc_assert (ref
->type
== REF_ARRAY
);
5650 /* Grab the start expressions from the array ref and
5651 copy them into actual arguments. */
5652 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5654 arg
= gfc_get_actual_arglist ();
5655 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5656 if (e
->value
.function
.actual
== NULL
)
5657 tail
= e
->value
.function
.actual
= arg
;
5665 /* Dump the reference list and set the rank. */
5666 gfc_free_ref_list (e
->ref
);
5668 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5671 gfc_resolve_expr (e
);
5675 /* This might have changed! */
5676 return e
->expr_type
== EXPR_FUNCTION
;
5681 gfc_resolve_character_operator (gfc_expr
*e
)
5683 gfc_expr
*op1
= e
->value
.op
.op1
;
5684 gfc_expr
*op2
= e
->value
.op
.op2
;
5685 gfc_expr
*e1
= NULL
;
5686 gfc_expr
*e2
= NULL
;
5688 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5690 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5691 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5692 else if (op1
->expr_type
== EXPR_CONSTANT
)
5693 e1
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
5694 op1
->value
.character
.length
);
5696 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5697 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5698 else if (op2
->expr_type
== EXPR_CONSTANT
)
5699 e2
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
5700 op2
->value
.character
.length
);
5702 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5712 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5713 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5714 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5715 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5716 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5722 /* Ensure that an character expression has a charlen and, if possible, a
5723 length expression. */
5726 fixup_charlen (gfc_expr
*e
)
5728 /* The cases fall through so that changes in expression type and the need
5729 for multiple fixes are picked up. In all circumstances, a charlen should
5730 be available for the middle end to hang a backend_decl on. */
5731 switch (e
->expr_type
)
5734 gfc_resolve_character_operator (e
);
5738 if (e
->expr_type
== EXPR_ARRAY
)
5739 gfc_resolve_character_array_constructor (e
);
5742 case EXPR_SUBSTRING
:
5743 if (!e
->ts
.u
.cl
&& e
->ref
)
5744 gfc_resolve_substring_charlen (e
);
5749 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5756 /* Update an actual argument to include the passed-object for type-bound
5757 procedures at the right position. */
5759 static gfc_actual_arglist
*
5760 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5763 gcc_assert (argpos
> 0);
5767 gfc_actual_arglist
* result
;
5769 result
= gfc_get_actual_arglist ();
5773 result
->name
= name
;
5779 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5781 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5786 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5789 extract_compcall_passed_object (gfc_expr
* e
)
5793 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5795 if (e
->value
.compcall
.base_object
)
5796 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5799 po
= gfc_get_expr ();
5800 po
->expr_type
= EXPR_VARIABLE
;
5801 po
->symtree
= e
->symtree
;
5802 po
->ref
= gfc_copy_ref (e
->ref
);
5803 po
->where
= e
->where
;
5806 if (!gfc_resolve_expr (po
))
5813 /* Update the arglist of an EXPR_COMPCALL expression to include the
5817 update_compcall_arglist (gfc_expr
* e
)
5820 gfc_typebound_proc
* tbp
;
5822 tbp
= e
->value
.compcall
.tbp
;
5827 po
= extract_compcall_passed_object (e
);
5831 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5837 if (tbp
->pass_arg_num
<= 0)
5840 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5848 /* Extract the passed object from a PPC call (a copy of it). */
5851 extract_ppc_passed_object (gfc_expr
*e
)
5856 po
= gfc_get_expr ();
5857 po
->expr_type
= EXPR_VARIABLE
;
5858 po
->symtree
= e
->symtree
;
5859 po
->ref
= gfc_copy_ref (e
->ref
);
5860 po
->where
= e
->where
;
5862 /* Remove PPC reference. */
5864 while ((*ref
)->next
)
5865 ref
= &(*ref
)->next
;
5866 gfc_free_ref_list (*ref
);
5869 if (!gfc_resolve_expr (po
))
5876 /* Update the actual arglist of a procedure pointer component to include the
5880 update_ppc_arglist (gfc_expr
* e
)
5884 gfc_typebound_proc
* tb
;
5886 ppc
= gfc_get_proc_ptr_comp (e
);
5894 else if (tb
->nopass
)
5897 po
= extract_ppc_passed_object (e
);
5904 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5909 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5911 gfc_error ("Base object for procedure-pointer component call at %L is of"
5912 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5916 gcc_assert (tb
->pass_arg_num
> 0);
5917 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5925 /* Check that the object a TBP is called on is valid, i.e. it must not be
5926 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5929 check_typebound_baseobject (gfc_expr
* e
)
5932 bool return_value
= false;
5934 base
= extract_compcall_passed_object (e
);
5938 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5940 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5944 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5946 gfc_error ("Base object for type-bound procedure call at %L is of"
5947 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5951 /* F08:C1230. If the procedure called is NOPASS,
5952 the base object must be scalar. */
5953 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5955 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5956 " be scalar", &e
->where
);
5960 return_value
= true;
5963 gfc_free_expr (base
);
5964 return return_value
;
5968 /* Resolve a call to a type-bound procedure, either function or subroutine,
5969 statically from the data in an EXPR_COMPCALL expression. The adapted
5970 arglist and the target-procedure symtree are returned. */
5973 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5974 gfc_actual_arglist
** actual
)
5976 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5977 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5979 /* Update the actual arglist for PASS. */
5980 if (!update_compcall_arglist (e
))
5983 *actual
= e
->value
.compcall
.actual
;
5984 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5986 gfc_free_ref_list (e
->ref
);
5988 e
->value
.compcall
.actual
= NULL
;
5990 /* If we find a deferred typebound procedure, check for derived types
5991 that an overriding typebound procedure has not been missed. */
5992 if (e
->value
.compcall
.name
5993 && !e
->value
.compcall
.tbp
->non_overridable
5994 && e
->value
.compcall
.base_object
5995 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
5998 gfc_symbol
*derived
;
6000 /* Use the derived type of the base_object. */
6001 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6004 /* If necessary, go through the inheritance chain. */
6005 while (!st
&& derived
)
6007 /* Look for the typebound procedure 'name'. */
6008 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6009 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6010 e
->value
.compcall
.name
);
6012 derived
= gfc_get_derived_super_type (derived
);
6015 /* Now find the specific name in the derived type namespace. */
6016 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6017 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6018 derived
->ns
, 1, &st
);
6026 /* Get the ultimate declared type from an expression. In addition,
6027 return the last class/derived type reference and the copy of the
6028 reference list. If check_types is set true, derived types are
6029 identified as well as class references. */
6031 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6032 gfc_expr
*e
, bool check_types
)
6034 gfc_symbol
*declared
;
6041 *new_ref
= gfc_copy_ref (e
->ref
);
6043 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6045 if (ref
->type
!= REF_COMPONENT
)
6048 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6049 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6050 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6052 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6058 if (declared
== NULL
)
6059 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6065 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6066 which of the specific bindings (if any) matches the arglist and transform
6067 the expression into a call of that binding. */
6070 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6072 gfc_typebound_proc
* genproc
;
6073 const char* genname
;
6075 gfc_symbol
*derived
;
6077 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6078 genname
= e
->value
.compcall
.name
;
6079 genproc
= e
->value
.compcall
.tbp
;
6081 if (!genproc
->is_generic
)
6084 /* Try the bindings on this type and in the inheritance hierarchy. */
6085 for (; genproc
; genproc
= genproc
->overridden
)
6089 gcc_assert (genproc
->is_generic
);
6090 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6093 gfc_actual_arglist
* args
;
6096 gcc_assert (g
->specific
);
6098 if (g
->specific
->error
)
6101 target
= g
->specific
->u
.specific
->n
.sym
;
6103 /* Get the right arglist by handling PASS/NOPASS. */
6104 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6105 if (!g
->specific
->nopass
)
6108 po
= extract_compcall_passed_object (e
);
6111 gfc_free_actual_arglist (args
);
6115 gcc_assert (g
->specific
->pass_arg_num
> 0);
6116 gcc_assert (!g
->specific
->error
);
6117 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6118 g
->specific
->pass_arg
);
6120 resolve_actual_arglist (args
, target
->attr
.proc
,
6121 is_external_proc (target
)
6122 && gfc_sym_get_dummy_args (target
) == NULL
);
6124 /* Check if this arglist matches the formal. */
6125 matches
= gfc_arglist_matches_symbol (&args
, target
);
6127 /* Clean up and break out of the loop if we've found it. */
6128 gfc_free_actual_arglist (args
);
6131 e
->value
.compcall
.tbp
= g
->specific
;
6132 genname
= g
->specific_st
->name
;
6133 /* Pass along the name for CLASS methods, where the vtab
6134 procedure pointer component has to be referenced. */
6142 /* Nothing matching found! */
6143 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6144 " %qs at %L", genname
, &e
->where
);
6148 /* Make sure that we have the right specific instance for the name. */
6149 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6151 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6153 e
->value
.compcall
.tbp
= st
->n
.tb
;
6159 /* Resolve a call to a type-bound subroutine. */
6162 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6164 gfc_actual_arglist
* newactual
;
6165 gfc_symtree
* target
;
6167 /* Check that's really a SUBROUTINE. */
6168 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6170 gfc_error ("%qs at %L should be a SUBROUTINE",
6171 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6175 if (!check_typebound_baseobject (c
->expr1
))
6178 /* Pass along the name for CLASS methods, where the vtab
6179 procedure pointer component has to be referenced. */
6181 *name
= c
->expr1
->value
.compcall
.name
;
6183 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6186 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6188 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6190 /* Transform into an ordinary EXEC_CALL for now. */
6192 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6195 c
->ext
.actual
= newactual
;
6196 c
->symtree
= target
;
6197 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6199 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6201 gfc_free_expr (c
->expr1
);
6202 c
->expr1
= gfc_get_expr ();
6203 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6204 c
->expr1
->symtree
= target
;
6205 c
->expr1
->where
= c
->loc
;
6207 return resolve_call (c
);
6211 /* Resolve a component-call expression. */
6213 resolve_compcall (gfc_expr
* e
, const char **name
)
6215 gfc_actual_arglist
* newactual
;
6216 gfc_symtree
* target
;
6218 /* Check that's really a FUNCTION. */
6219 if (!e
->value
.compcall
.tbp
->function
)
6221 gfc_error ("%qs at %L should be a FUNCTION",
6222 e
->value
.compcall
.name
, &e
->where
);
6226 /* These must not be assign-calls! */
6227 gcc_assert (!e
->value
.compcall
.assign
);
6229 if (!check_typebound_baseobject (e
))
6232 /* Pass along the name for CLASS methods, where the vtab
6233 procedure pointer component has to be referenced. */
6235 *name
= e
->value
.compcall
.name
;
6237 if (!resolve_typebound_generic_call (e
, name
))
6239 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6241 /* Take the rank from the function's symbol. */
6242 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6243 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6245 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6246 arglist to the TBP's binding target. */
6248 if (!resolve_typebound_static (e
, &target
, &newactual
))
6251 e
->value
.function
.actual
= newactual
;
6252 e
->value
.function
.name
= NULL
;
6253 e
->value
.function
.esym
= target
->n
.sym
;
6254 e
->value
.function
.isym
= NULL
;
6255 e
->symtree
= target
;
6256 e
->ts
= target
->n
.sym
->ts
;
6257 e
->expr_type
= EXPR_FUNCTION
;
6259 /* Resolution is not necessary if this is a class subroutine; this
6260 function only has to identify the specific proc. Resolution of
6261 the call will be done next in resolve_typebound_call. */
6262 return gfc_resolve_expr (e
);
6266 static bool resolve_fl_derived (gfc_symbol
*sym
);
6269 /* Resolve a typebound function, or 'method'. First separate all
6270 the non-CLASS references by calling resolve_compcall directly. */
6273 resolve_typebound_function (gfc_expr
* e
)
6275 gfc_symbol
*declared
;
6287 /* Deal with typebound operators for CLASS objects. */
6288 expr
= e
->value
.compcall
.base_object
;
6289 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6290 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6292 /* If the base_object is not a variable, the corresponding actual
6293 argument expression must be stored in e->base_expression so
6294 that the corresponding tree temporary can be used as the base
6295 object in gfc_conv_procedure_call. */
6296 if (expr
->expr_type
!= EXPR_VARIABLE
)
6298 gfc_actual_arglist
*args
;
6300 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6302 if (expr
== args
->expr
)
6307 /* Since the typebound operators are generic, we have to ensure
6308 that any delays in resolution are corrected and that the vtab
6311 declared
= ts
.u
.derived
;
6312 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6313 if (c
->ts
.u
.derived
== NULL
)
6314 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6316 if (!resolve_compcall (e
, &name
))
6319 /* Use the generic name if it is there. */
6320 name
= name
? name
: e
->value
.function
.esym
->name
;
6321 e
->symtree
= expr
->symtree
;
6322 e
->ref
= gfc_copy_ref (expr
->ref
);
6323 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6325 /* Trim away the extraneous references that emerge from nested
6326 use of interface.c (extend_expr). */
6327 if (class_ref
&& class_ref
->next
)
6329 gfc_free_ref_list (class_ref
->next
);
6330 class_ref
->next
= NULL
;
6332 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6334 gfc_free_ref_list (e
->ref
);
6338 gfc_add_vptr_component (e
);
6339 gfc_add_component_ref (e
, name
);
6340 e
->value
.function
.esym
= NULL
;
6341 if (expr
->expr_type
!= EXPR_VARIABLE
)
6342 e
->base_expr
= expr
;
6347 return resolve_compcall (e
, NULL
);
6349 if (!resolve_ref (e
))
6352 /* Get the CLASS declared type. */
6353 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6355 if (!resolve_fl_derived (declared
))
6358 /* Weed out cases of the ultimate component being a derived type. */
6359 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6360 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6362 gfc_free_ref_list (new_ref
);
6363 return resolve_compcall (e
, NULL
);
6366 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6367 declared
= c
->ts
.u
.derived
;
6369 /* Treat the call as if it is a typebound procedure, in order to roll
6370 out the correct name for the specific function. */
6371 if (!resolve_compcall (e
, &name
))
6373 gfc_free_ref_list (new_ref
);
6380 /* Convert the expression to a procedure pointer component call. */
6381 e
->value
.function
.esym
= NULL
;
6387 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6388 gfc_add_vptr_component (e
);
6389 gfc_add_component_ref (e
, name
);
6391 /* Recover the typespec for the expression. This is really only
6392 necessary for generic procedures, where the additional call
6393 to gfc_add_component_ref seems to throw the collection of the
6394 correct typespec. */
6398 gfc_free_ref_list (new_ref
);
6403 /* Resolve a typebound subroutine, or 'method'. First separate all
6404 the non-CLASS references by calling resolve_typebound_call
6408 resolve_typebound_subroutine (gfc_code
*code
)
6410 gfc_symbol
*declared
;
6420 st
= code
->expr1
->symtree
;
6422 /* Deal with typebound operators for CLASS objects. */
6423 expr
= code
->expr1
->value
.compcall
.base_object
;
6424 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6425 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6427 /* If the base_object is not a variable, the corresponding actual
6428 argument expression must be stored in e->base_expression so
6429 that the corresponding tree temporary can be used as the base
6430 object in gfc_conv_procedure_call. */
6431 if (expr
->expr_type
!= EXPR_VARIABLE
)
6433 gfc_actual_arglist
*args
;
6435 args
= code
->expr1
->value
.function
.actual
;
6436 for (; args
; args
= args
->next
)
6437 if (expr
== args
->expr
)
6441 /* Since the typebound operators are generic, we have to ensure
6442 that any delays in resolution are corrected and that the vtab
6444 declared
= expr
->ts
.u
.derived
;
6445 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6446 if (c
->ts
.u
.derived
== NULL
)
6447 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6449 if (!resolve_typebound_call (code
, &name
, NULL
))
6452 /* Use the generic name if it is there. */
6453 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6454 code
->expr1
->symtree
= expr
->symtree
;
6455 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6457 /* Trim away the extraneous references that emerge from nested
6458 use of interface.c (extend_expr). */
6459 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6460 if (class_ref
&& class_ref
->next
)
6462 gfc_free_ref_list (class_ref
->next
);
6463 class_ref
->next
= NULL
;
6465 else if (code
->expr1
->ref
&& !class_ref
)
6467 gfc_free_ref_list (code
->expr1
->ref
);
6468 code
->expr1
->ref
= NULL
;
6471 /* Now use the procedure in the vtable. */
6472 gfc_add_vptr_component (code
->expr1
);
6473 gfc_add_component_ref (code
->expr1
, name
);
6474 code
->expr1
->value
.function
.esym
= NULL
;
6475 if (expr
->expr_type
!= EXPR_VARIABLE
)
6476 code
->expr1
->base_expr
= expr
;
6481 return resolve_typebound_call (code
, NULL
, NULL
);
6483 if (!resolve_ref (code
->expr1
))
6486 /* Get the CLASS declared type. */
6487 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6489 /* Weed out cases of the ultimate component being a derived type. */
6490 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6491 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6493 gfc_free_ref_list (new_ref
);
6494 return resolve_typebound_call (code
, NULL
, NULL
);
6497 if (!resolve_typebound_call (code
, &name
, &overridable
))
6499 gfc_free_ref_list (new_ref
);
6502 ts
= code
->expr1
->ts
;
6506 /* Convert the expression to a procedure pointer component call. */
6507 code
->expr1
->value
.function
.esym
= NULL
;
6508 code
->expr1
->symtree
= st
;
6511 code
->expr1
->ref
= new_ref
;
6513 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6514 gfc_add_vptr_component (code
->expr1
);
6515 gfc_add_component_ref (code
->expr1
, name
);
6517 /* Recover the typespec for the expression. This is really only
6518 necessary for generic procedures, where the additional call
6519 to gfc_add_component_ref seems to throw the collection of the
6520 correct typespec. */
6521 code
->expr1
->ts
= ts
;
6524 gfc_free_ref_list (new_ref
);
6530 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6533 resolve_ppc_call (gfc_code
* c
)
6535 gfc_component
*comp
;
6537 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6538 gcc_assert (comp
!= NULL
);
6540 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6541 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6543 if (!comp
->attr
.subroutine
)
6544 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6546 if (!resolve_ref (c
->expr1
))
6549 if (!update_ppc_arglist (c
->expr1
))
6552 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6554 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6555 !(comp
->ts
.interface
6556 && comp
->ts
.interface
->formal
)))
6559 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6562 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6568 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6571 resolve_expr_ppc (gfc_expr
* e
)
6573 gfc_component
*comp
;
6575 comp
= gfc_get_proc_ptr_comp (e
);
6576 gcc_assert (comp
!= NULL
);
6578 /* Convert to EXPR_FUNCTION. */
6579 e
->expr_type
= EXPR_FUNCTION
;
6580 e
->value
.function
.isym
= NULL
;
6581 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6583 if (comp
->as
!= NULL
)
6584 e
->rank
= comp
->as
->rank
;
6586 if (!comp
->attr
.function
)
6587 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6589 if (!resolve_ref (e
))
6592 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6593 !(comp
->ts
.interface
6594 && comp
->ts
.interface
->formal
)))
6597 if (!update_ppc_arglist (e
))
6600 if (!check_pure_function(e
))
6603 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6610 gfc_is_expandable_expr (gfc_expr
*e
)
6612 gfc_constructor
*con
;
6614 if (e
->expr_type
== EXPR_ARRAY
)
6616 /* Traverse the constructor looking for variables that are flavor
6617 parameter. Parameters must be expanded since they are fully used at
6619 con
= gfc_constructor_first (e
->value
.constructor
);
6620 for (; con
; con
= gfc_constructor_next (con
))
6622 if (con
->expr
->expr_type
== EXPR_VARIABLE
6623 && con
->expr
->symtree
6624 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6625 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6627 if (con
->expr
->expr_type
== EXPR_ARRAY
6628 && gfc_is_expandable_expr (con
->expr
))
6637 /* Sometimes variables in specification expressions of the result
6638 of module procedures in submodules wind up not being the 'real'
6639 dummy. Find this, if possible, in the namespace of the first
6643 fixup_unique_dummy (gfc_expr
*e
)
6645 gfc_symtree
*st
= NULL
;
6646 gfc_symbol
*s
= NULL
;
6648 if (e
->symtree
->n
.sym
->ns
->proc_name
6649 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6650 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6653 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6656 && st
->n
.sym
!= NULL
6657 && st
->n
.sym
->attr
.dummy
)
6661 /* Resolve an expression. That is, make sure that types of operands agree
6662 with their operators, intrinsic operators are converted to function calls
6663 for overloaded types and unresolved function references are resolved. */
6666 gfc_resolve_expr (gfc_expr
*e
)
6669 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6674 /* inquiry_argument only applies to variables. */
6675 inquiry_save
= inquiry_argument
;
6676 actual_arg_save
= actual_arg
;
6677 first_actual_arg_save
= first_actual_arg
;
6679 if (e
->expr_type
!= EXPR_VARIABLE
)
6681 inquiry_argument
= false;
6683 first_actual_arg
= false;
6685 else if (e
->symtree
!= NULL
6686 && *e
->symtree
->name
== '@'
6687 && e
->symtree
->n
.sym
->attr
.dummy
)
6689 /* Deal with submodule specification expressions that are not
6690 found to be referenced in module.c(read_cleanup). */
6691 fixup_unique_dummy (e
);
6694 switch (e
->expr_type
)
6697 t
= resolve_operator (e
);
6703 if (check_host_association (e
))
6704 t
= resolve_function (e
);
6706 t
= resolve_variable (e
);
6708 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6709 && e
->ref
->type
!= REF_SUBSTRING
)
6710 gfc_resolve_substring_charlen (e
);
6715 t
= resolve_typebound_function (e
);
6718 case EXPR_SUBSTRING
:
6719 t
= resolve_ref (e
);
6728 t
= resolve_expr_ppc (e
);
6733 if (!resolve_ref (e
))
6736 t
= gfc_resolve_array_constructor (e
);
6737 /* Also try to expand a constructor. */
6740 expression_rank (e
);
6741 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6742 gfc_expand_constructor (e
, false);
6745 /* This provides the opportunity for the length of constructors with
6746 character valued function elements to propagate the string length
6747 to the expression. */
6748 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6750 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6751 here rather then add a duplicate test for it above. */
6752 gfc_expand_constructor (e
, false);
6753 t
= gfc_resolve_character_array_constructor (e
);
6758 case EXPR_STRUCTURE
:
6759 t
= resolve_ref (e
);
6763 t
= resolve_structure_cons (e
, 0);
6767 t
= gfc_simplify_expr (e
, 0);
6771 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6774 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6777 inquiry_argument
= inquiry_save
;
6778 actual_arg
= actual_arg_save
;
6779 first_actual_arg
= first_actual_arg_save
;
6785 /* Resolve an expression from an iterator. They must be scalar and have
6786 INTEGER or (optionally) REAL type. */
6789 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6790 const char *name_msgid
)
6792 if (!gfc_resolve_expr (expr
))
6795 if (expr
->rank
!= 0)
6797 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6801 if (expr
->ts
.type
!= BT_INTEGER
)
6803 if (expr
->ts
.type
== BT_REAL
)
6806 return gfc_notify_std (GFC_STD_F95_DEL
,
6807 "%s at %L must be integer",
6808 _(name_msgid
), &expr
->where
);
6811 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6818 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6826 /* Resolve the expressions in an iterator structure. If REAL_OK is
6827 false allow only INTEGER type iterators, otherwise allow REAL types.
6828 Set own_scope to true for ac-implied-do and data-implied-do as those
6829 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6832 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6834 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6837 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6838 _("iterator variable")))
6841 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6842 "Start expression in DO loop"))
6845 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6846 "End expression in DO loop"))
6849 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6850 "Step expression in DO loop"))
6853 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6855 if ((iter
->step
->ts
.type
== BT_INTEGER
6856 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6857 || (iter
->step
->ts
.type
== BT_REAL
6858 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6860 gfc_error ("Step expression in DO loop at %L cannot be zero",
6861 &iter
->step
->where
);
6866 /* Convert start, end, and step to the same type as var. */
6867 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6868 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6869 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6871 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6872 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6873 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6875 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6876 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6877 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6879 if (iter
->start
->expr_type
== EXPR_CONSTANT
6880 && iter
->end
->expr_type
== EXPR_CONSTANT
6881 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6884 if (iter
->start
->ts
.type
== BT_INTEGER
)
6886 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6887 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6891 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6892 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6894 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6895 gfc_warning (OPT_Wzerotrip
,
6896 "DO loop at %L will be executed zero times",
6897 &iter
->step
->where
);
6900 if (iter
->end
->expr_type
== EXPR_CONSTANT
6901 && iter
->end
->ts
.type
== BT_INTEGER
6902 && iter
->step
->expr_type
== EXPR_CONSTANT
6903 && iter
->step
->ts
.type
== BT_INTEGER
6904 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6905 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6907 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6908 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6910 if (is_step_positive
6911 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6912 gfc_warning (OPT_Wundefined_do_loop
,
6913 "DO loop at %L is undefined as it overflows",
6914 &iter
->step
->where
);
6915 else if (!is_step_positive
6916 && mpz_cmp (iter
->end
->value
.integer
,
6917 gfc_integer_kinds
[k
].min_int
) == 0)
6918 gfc_warning (OPT_Wundefined_do_loop
,
6919 "DO loop at %L is undefined as it underflows",
6920 &iter
->step
->where
);
6927 /* Traversal function for find_forall_index. f == 2 signals that
6928 that variable itself is not to be checked - only the references. */
6931 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6933 if (expr
->expr_type
!= EXPR_VARIABLE
)
6936 /* A scalar assignment */
6937 if (!expr
->ref
|| *f
== 1)
6939 if (expr
->symtree
->n
.sym
== sym
)
6951 /* Check whether the FORALL index appears in the expression or not.
6952 Returns true if SYM is found in EXPR. */
6955 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6957 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6964 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6965 to be a scalar INTEGER variable. The subscripts and stride are scalar
6966 INTEGERs, and if stride is a constant it must be nonzero.
6967 Furthermore "A subscript or stride in a forall-triplet-spec shall
6968 not contain a reference to any index-name in the
6969 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6972 resolve_forall_iterators (gfc_forall_iterator
*it
)
6974 gfc_forall_iterator
*iter
, *iter2
;
6976 for (iter
= it
; iter
; iter
= iter
->next
)
6978 if (gfc_resolve_expr (iter
->var
)
6979 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6980 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6983 if (gfc_resolve_expr (iter
->start
)
6984 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
6985 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
6986 &iter
->start
->where
);
6987 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6988 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6990 if (gfc_resolve_expr (iter
->end
)
6991 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6992 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6994 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
6995 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6997 if (gfc_resolve_expr (iter
->stride
))
6999 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7000 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7001 &iter
->stride
->where
, "INTEGER");
7003 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7004 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7005 gfc_error ("FORALL stride expression at %L cannot be zero",
7006 &iter
->stride
->where
);
7008 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7009 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7012 for (iter
= it
; iter
; iter
= iter
->next
)
7013 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7015 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7016 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7017 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7018 gfc_error ("FORALL index %qs may not appear in triplet "
7019 "specification at %L", iter
->var
->symtree
->name
,
7020 &iter2
->start
->where
);
7025 /* Given a pointer to a symbol that is a derived type, see if it's
7026 inaccessible, i.e. if it's defined in another module and the components are
7027 PRIVATE. The search is recursive if necessary. Returns zero if no
7028 inaccessible components are found, nonzero otherwise. */
7031 derived_inaccessible (gfc_symbol
*sym
)
7035 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7038 for (c
= sym
->components
; c
; c
= c
->next
)
7040 /* Prevent an infinite loop through this function. */
7041 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7042 && sym
== c
->ts
.u
.derived
)
7045 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7053 /* Resolve the argument of a deallocate expression. The expression must be
7054 a pointer or a full array. */
7057 resolve_deallocate_expr (gfc_expr
*e
)
7059 symbol_attribute attr
;
7060 int allocatable
, pointer
;
7066 if (!gfc_resolve_expr (e
))
7069 if (e
->expr_type
!= EXPR_VARIABLE
)
7072 sym
= e
->symtree
->n
.sym
;
7073 unlimited
= UNLIMITED_POLY(sym
);
7075 if (sym
->ts
.type
== BT_CLASS
)
7077 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7078 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7082 allocatable
= sym
->attr
.allocatable
;
7083 pointer
= sym
->attr
.pointer
;
7085 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7090 if (ref
->u
.ar
.type
!= AR_FULL
7091 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7092 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7097 c
= ref
->u
.c
.component
;
7098 if (c
->ts
.type
== BT_CLASS
)
7100 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7101 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7105 allocatable
= c
->attr
.allocatable
;
7106 pointer
= c
->attr
.pointer
;
7116 attr
= gfc_expr_attr (e
);
7118 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7121 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7127 if (gfc_is_coindexed (e
))
7129 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7134 && !gfc_check_vardef_context (e
, true, true, false,
7135 _("DEALLOCATE object")))
7137 if (!gfc_check_vardef_context (e
, false, true, false,
7138 _("DEALLOCATE object")))
7145 /* Returns true if the expression e contains a reference to the symbol sym. */
7147 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7149 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7156 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7158 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7162 /* Given the expression node e for an allocatable/pointer of derived type to be
7163 allocated, get the expression node to be initialized afterwards (needed for
7164 derived types with default initializers, and derived types with allocatable
7165 components that need nullification.) */
7168 gfc_expr_to_initialize (gfc_expr
*e
)
7174 result
= gfc_copy_expr (e
);
7176 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7177 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7178 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7180 ref
->u
.ar
.type
= AR_FULL
;
7182 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7183 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7188 gfc_free_shape (&result
->shape
, result
->rank
);
7190 /* Recalculate rank, shape, etc. */
7191 gfc_resolve_expr (result
);
7196 /* If the last ref of an expression is an array ref, return a copy of the
7197 expression with that one removed. Otherwise, a copy of the original
7198 expression. This is used for allocate-expressions and pointer assignment
7199 LHS, where there may be an array specification that needs to be stripped
7200 off when using gfc_check_vardef_context. */
7203 remove_last_array_ref (gfc_expr
* e
)
7208 e2
= gfc_copy_expr (e
);
7209 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7210 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7212 gfc_free_ref_list (*r
);
7221 /* Used in resolve_allocate_expr to check that a allocation-object and
7222 a source-expr are conformable. This does not catch all possible
7223 cases; in particular a runtime checking is needed. */
7226 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7229 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7231 /* First compare rank. */
7232 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7233 || (!tail
&& e1
->rank
!= e2
->rank
))
7235 gfc_error ("Source-expr at %L must be scalar or have the "
7236 "same rank as the allocate-object at %L",
7237 &e1
->where
, &e2
->where
);
7248 for (i
= 0; i
< e1
->rank
; i
++)
7250 if (tail
->u
.ar
.start
[i
] == NULL
)
7253 if (tail
->u
.ar
.end
[i
])
7255 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7256 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7257 mpz_add_ui (s
, s
, 1);
7261 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7264 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7266 gfc_error ("Source-expr at %L and allocate-object at %L must "
7267 "have the same shape", &e1
->where
, &e2
->where
);
7280 /* Resolve the expression in an ALLOCATE statement, doing the additional
7281 checks to see whether the expression is OK or not. The expression must
7282 have a trailing array reference that gives the size of the array. */
7285 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7287 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7291 symbol_attribute attr
;
7292 gfc_ref
*ref
, *ref2
;
7295 gfc_symbol
*sym
= NULL
;
7300 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7301 checking of coarrays. */
7302 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7303 if (ref
->next
== NULL
)
7306 if (ref
&& ref
->type
== REF_ARRAY
)
7307 ref
->u
.ar
.in_allocate
= true;
7309 if (!gfc_resolve_expr (e
))
7312 /* Make sure the expression is allocatable or a pointer. If it is
7313 pointer, the next-to-last reference must be a pointer. */
7317 sym
= e
->symtree
->n
.sym
;
7319 /* Check whether ultimate component is abstract and CLASS. */
7322 /* Is the allocate-object unlimited polymorphic? */
7323 unlimited
= UNLIMITED_POLY(e
);
7325 if (e
->expr_type
!= EXPR_VARIABLE
)
7328 attr
= gfc_expr_attr (e
);
7329 pointer
= attr
.pointer
;
7330 dimension
= attr
.dimension
;
7331 codimension
= attr
.codimension
;
7335 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7337 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7338 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7339 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7340 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7341 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7345 allocatable
= sym
->attr
.allocatable
;
7346 pointer
= sym
->attr
.pointer
;
7347 dimension
= sym
->attr
.dimension
;
7348 codimension
= sym
->attr
.codimension
;
7353 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7358 if (ref
->u
.ar
.codimen
> 0)
7361 for (n
= ref
->u
.ar
.dimen
;
7362 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7363 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7370 if (ref
->next
!= NULL
)
7378 gfc_error ("Coindexed allocatable object at %L",
7383 c
= ref
->u
.c
.component
;
7384 if (c
->ts
.type
== BT_CLASS
)
7386 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7387 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7388 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7389 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7390 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7394 allocatable
= c
->attr
.allocatable
;
7395 pointer
= c
->attr
.pointer
;
7396 dimension
= c
->attr
.dimension
;
7397 codimension
= c
->attr
.codimension
;
7398 is_abstract
= c
->attr
.abstract
;
7410 /* Check for F08:C628. */
7411 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7413 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7418 /* Some checks for the SOURCE tag. */
7421 /* Check F03:C631. */
7422 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7424 gfc_error ("Type of entity at %L is type incompatible with "
7425 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7429 /* Check F03:C632 and restriction following Note 6.18. */
7430 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7433 /* Check F03:C633. */
7434 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7436 gfc_error ("The allocate-object at %L and the source-expr at %L "
7437 "shall have the same kind type parameter",
7438 &e
->where
, &code
->expr3
->where
);
7442 /* Check F2008, C642. */
7443 if (code
->expr3
->ts
.type
== BT_DERIVED
7444 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7445 || (code
->expr3
->ts
.u
.derived
->from_intmod
7446 == INTMOD_ISO_FORTRAN_ENV
7447 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7448 == ISOFORTRAN_LOCK_TYPE
)))
7450 gfc_error ("The source-expr at %L shall neither be of type "
7451 "LOCK_TYPE nor have a LOCK_TYPE component if "
7452 "allocate-object at %L is a coarray",
7453 &code
->expr3
->where
, &e
->where
);
7457 /* Check TS18508, C702/C703. */
7458 if (code
->expr3
->ts
.type
== BT_DERIVED
7459 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7460 || (code
->expr3
->ts
.u
.derived
->from_intmod
7461 == INTMOD_ISO_FORTRAN_ENV
7462 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7463 == ISOFORTRAN_EVENT_TYPE
)))
7465 gfc_error ("The source-expr at %L shall neither be of type "
7466 "EVENT_TYPE nor have a EVENT_TYPE component if "
7467 "allocate-object at %L is a coarray",
7468 &code
->expr3
->where
, &e
->where
);
7473 /* Check F08:C629. */
7474 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7477 gcc_assert (e
->ts
.type
== BT_CLASS
);
7478 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7479 "type-spec or source-expr", sym
->name
, &e
->where
);
7483 /* Check F08:C632. */
7484 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7485 && !UNLIMITED_POLY (e
))
7487 int cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7488 code
->ext
.alloc
.ts
.u
.cl
->length
);
7489 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7491 gfc_error ("Allocating %s at %L with type-spec requires the same "
7492 "character-length parameter as in the declaration",
7493 sym
->name
, &e
->where
);
7498 /* In the variable definition context checks, gfc_expr_attr is used
7499 on the expression. This is fooled by the array specification
7500 present in e, thus we have to eliminate that one temporarily. */
7501 e2
= remove_last_array_ref (e
);
7504 t
= gfc_check_vardef_context (e2
, true, true, false,
7505 _("ALLOCATE object"));
7507 t
= gfc_check_vardef_context (e2
, false, true, false,
7508 _("ALLOCATE object"));
7513 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7514 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7516 /* For class arrays, the initialization with SOURCE is done
7517 using _copy and trans_call. It is convenient to exploit that
7518 when the allocated type is different from the declared type but
7519 no SOURCE exists by setting expr3. */
7520 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7522 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7523 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7524 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7526 /* We have to zero initialize the integer variable. */
7527 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7530 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7532 /* Make sure the vtab symbol is present when
7533 the module variables are generated. */
7534 gfc_typespec ts
= e
->ts
;
7536 ts
= code
->expr3
->ts
;
7537 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7538 ts
= code
->ext
.alloc
.ts
;
7540 /* Finding the vtab also publishes the type's symbol. Therefore this
7541 statement is necessary. */
7542 gfc_find_derived_vtab (ts
.u
.derived
);
7544 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7546 /* Again, make sure the vtab symbol is present when
7547 the module variables are generated. */
7548 gfc_typespec
*ts
= NULL
;
7550 ts
= &code
->expr3
->ts
;
7552 ts
= &code
->ext
.alloc
.ts
;
7556 /* Finding the vtab also publishes the type's symbol. Therefore this
7557 statement is necessary. */
7561 if (dimension
== 0 && codimension
== 0)
7564 /* Make sure the last reference node is an array specification. */
7566 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7567 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7572 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7573 "in ALLOCATE statement at %L", &e
->where
))
7575 if (code
->expr3
->rank
!= 0)
7576 *array_alloc_wo_spec
= true;
7579 gfc_error ("Array specification or array-valued SOURCE= "
7580 "expression required in ALLOCATE statement at %L",
7587 gfc_error ("Array specification required in ALLOCATE statement "
7588 "at %L", &e
->where
);
7593 /* Make sure that the array section reference makes sense in the
7594 context of an ALLOCATE specification. */
7599 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7600 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7602 gfc_error ("Coarray specification required in ALLOCATE statement "
7603 "at %L", &e
->where
);
7607 for (i
= 0; i
< ar
->dimen
; i
++)
7609 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7612 switch (ar
->dimen_type
[i
])
7618 if (ar
->start
[i
] != NULL
7619 && ar
->end
[i
] != NULL
7620 && ar
->stride
[i
] == NULL
)
7628 case DIMEN_THIS_IMAGE
:
7629 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7635 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7637 sym
= a
->expr
->symtree
->n
.sym
;
7639 /* TODO - check derived type components. */
7640 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7643 if ((ar
->start
[i
] != NULL
7644 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7645 || (ar
->end
[i
] != NULL
7646 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7648 gfc_error ("%qs must not appear in the array specification at "
7649 "%L in the same ALLOCATE statement where it is "
7650 "itself allocated", sym
->name
, &ar
->where
);
7656 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7658 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7659 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7661 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7663 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7664 "statement at %L", &e
->where
);
7670 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7671 && ar
->stride
[i
] == NULL
)
7674 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7688 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7690 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7691 gfc_alloc
*a
, *p
, *q
;
7694 errmsg
= code
->expr2
;
7696 /* Check the stat variable. */
7699 gfc_check_vardef_context (stat
, false, false, false,
7700 _("STAT variable"));
7702 if ((stat
->ts
.type
!= BT_INTEGER
7703 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7704 || stat
->ref
->type
== REF_COMPONENT
)))
7706 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7707 "variable", &stat
->where
);
7709 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7710 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7712 gfc_ref
*ref1
, *ref2
;
7715 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7716 ref1
= ref1
->next
, ref2
= ref2
->next
)
7718 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7720 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7729 gfc_error ("Stat-variable at %L shall not be %sd within "
7730 "the same %s statement", &stat
->where
, fcn
, fcn
);
7736 /* Check the errmsg variable. */
7740 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7743 gfc_check_vardef_context (errmsg
, false, false, false,
7744 _("ERRMSG variable"));
7746 if ((errmsg
->ts
.type
!= BT_CHARACTER
7748 && (errmsg
->ref
->type
== REF_ARRAY
7749 || errmsg
->ref
->type
== REF_COMPONENT
)))
7750 || errmsg
->rank
> 0 )
7751 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7752 "variable", &errmsg
->where
);
7754 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7755 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7757 gfc_ref
*ref1
, *ref2
;
7760 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7761 ref1
= ref1
->next
, ref2
= ref2
->next
)
7763 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7765 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7774 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7775 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7781 /* Check that an allocate-object appears only once in the statement. */
7783 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7786 for (q
= p
->next
; q
; q
= q
->next
)
7789 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7791 /* This is a potential collision. */
7792 gfc_ref
*pr
= pe
->ref
;
7793 gfc_ref
*qr
= qe
->ref
;
7795 /* Follow the references until
7796 a) They start to differ, in which case there is no error;
7797 you can deallocate a%b and a%c in a single statement
7798 b) Both of them stop, which is an error
7799 c) One of them stops, which is also an error. */
7802 if (pr
== NULL
&& qr
== NULL
)
7804 gfc_error ("Allocate-object at %L also appears at %L",
7805 &pe
->where
, &qe
->where
);
7808 else if (pr
!= NULL
&& qr
== NULL
)
7810 gfc_error ("Allocate-object at %L is subobject of"
7811 " object at %L", &pe
->where
, &qe
->where
);
7814 else if (pr
== NULL
&& qr
!= NULL
)
7816 gfc_error ("Allocate-object at %L is subobject of"
7817 " object at %L", &qe
->where
, &pe
->where
);
7820 /* Here, pr != NULL && qr != NULL */
7821 gcc_assert(pr
->type
== qr
->type
);
7822 if (pr
->type
== REF_ARRAY
)
7824 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7826 gcc_assert (qr
->type
== REF_ARRAY
);
7828 if (pr
->next
&& qr
->next
)
7831 gfc_array_ref
*par
= &(pr
->u
.ar
);
7832 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7834 for (i
=0; i
<par
->dimen
; i
++)
7836 if ((par
->start
[i
] != NULL
7837 || qar
->start
[i
] != NULL
)
7838 && gfc_dep_compare_expr (par
->start
[i
],
7839 qar
->start
[i
]) != 0)
7846 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7859 if (strcmp (fcn
, "ALLOCATE") == 0)
7861 bool arr_alloc_wo_spec
= false;
7863 /* Resolving the expr3 in the loop over all objects to allocate would
7864 execute loop invariant code for each loop item. Therefore do it just
7866 if (code
->expr3
&& code
->expr3
->mold
7867 && code
->expr3
->ts
.type
== BT_DERIVED
)
7869 /* Default initialization via MOLD (non-polymorphic). */
7870 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7873 gfc_resolve_expr (rhs
);
7874 gfc_free_expr (code
->expr3
);
7878 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7879 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7881 if (arr_alloc_wo_spec
&& code
->expr3
)
7883 /* Mark the allocate to have to take the array specification
7885 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7890 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7891 resolve_deallocate_expr (a
->expr
);
7896 /************ SELECT CASE resolution subroutines ************/
7898 /* Callback function for our mergesort variant. Determines interval
7899 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7900 op1 > op2. Assumes we're not dealing with the default case.
7901 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7902 There are nine situations to check. */
7905 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7909 if (op1
->low
== NULL
) /* op1 = (:L) */
7911 /* op2 = (:N), so overlap. */
7913 /* op2 = (M:) or (M:N), L < M */
7914 if (op2
->low
!= NULL
7915 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7918 else if (op1
->high
== NULL
) /* op1 = (K:) */
7920 /* op2 = (M:), so overlap. */
7922 /* op2 = (:N) or (M:N), K > N */
7923 if (op2
->high
!= NULL
7924 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7927 else /* op1 = (K:L) */
7929 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7930 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7932 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7933 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7935 else /* op2 = (M:N) */
7939 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7942 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7951 /* Merge-sort a double linked case list, detecting overlap in the
7952 process. LIST is the head of the double linked case list before it
7953 is sorted. Returns the head of the sorted list if we don't see any
7954 overlap, or NULL otherwise. */
7957 check_case_overlap (gfc_case
*list
)
7959 gfc_case
*p
, *q
, *e
, *tail
;
7960 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7962 /* If the passed list was empty, return immediately. */
7969 /* Loop unconditionally. The only exit from this loop is a return
7970 statement, when we've finished sorting the case list. */
7977 /* Count the number of merges we do in this pass. */
7980 /* Loop while there exists a merge to be done. */
7985 /* Count this merge. */
7988 /* Cut the list in two pieces by stepping INSIZE places
7989 forward in the list, starting from P. */
7992 for (i
= 0; i
< insize
; i
++)
8001 /* Now we have two lists. Merge them! */
8002 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8004 /* See from which the next case to merge comes from. */
8007 /* P is empty so the next case must come from Q. */
8012 else if (qsize
== 0 || q
== NULL
)
8021 cmp
= compare_cases (p
, q
);
8024 /* The whole case range for P is less than the
8032 /* The whole case range for Q is greater than
8033 the case range for P. */
8040 /* The cases overlap, or they are the same
8041 element in the list. Either way, we must
8042 issue an error and get the next case from P. */
8043 /* FIXME: Sort P and Q by line number. */
8044 gfc_error ("CASE label at %L overlaps with CASE "
8045 "label at %L", &p
->where
, &q
->where
);
8053 /* Add the next element to the merged list. */
8062 /* P has now stepped INSIZE places along, and so has Q. So
8063 they're the same. */
8068 /* If we have done only one merge or none at all, we've
8069 finished sorting the cases. */
8078 /* Otherwise repeat, merging lists twice the size. */
8084 /* Check to see if an expression is suitable for use in a CASE statement.
8085 Makes sure that all case expressions are scalar constants of the same
8086 type. Return false if anything is wrong. */
8089 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8091 if (e
== NULL
) return true;
8093 if (e
->ts
.type
!= case_expr
->ts
.type
)
8095 gfc_error ("Expression in CASE statement at %L must be of type %s",
8096 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8100 /* C805 (R808) For a given case-construct, each case-value shall be of
8101 the same type as case-expr. For character type, length differences
8102 are allowed, but the kind type parameters shall be the same. */
8104 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8106 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8107 &e
->where
, case_expr
->ts
.kind
);
8111 /* Convert the case value kind to that of case expression kind,
8114 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8115 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8119 gfc_error ("Expression in CASE statement at %L must be scalar",
8128 /* Given a completely parsed select statement, we:
8130 - Validate all expressions and code within the SELECT.
8131 - Make sure that the selection expression is not of the wrong type.
8132 - Make sure that no case ranges overlap.
8133 - Eliminate unreachable cases and unreachable code resulting from
8134 removing case labels.
8136 The standard does allow unreachable cases, e.g. CASE (5:3). But
8137 they are a hassle for code generation, and to prevent that, we just
8138 cut them out here. This is not necessary for overlapping cases
8139 because they are illegal and we never even try to generate code.
8141 We have the additional caveat that a SELECT construct could have
8142 been a computed GOTO in the source code. Fortunately we can fairly
8143 easily work around that here: The case_expr for a "real" SELECT CASE
8144 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8145 we have to do is make sure that the case_expr is a scalar integer
8149 resolve_select (gfc_code
*code
, bool select_type
)
8152 gfc_expr
*case_expr
;
8153 gfc_case
*cp
, *default_case
, *tail
, *head
;
8154 int seen_unreachable
;
8160 if (code
->expr1
== NULL
)
8162 /* This was actually a computed GOTO statement. */
8163 case_expr
= code
->expr2
;
8164 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8165 gfc_error ("Selection expression in computed GOTO statement "
8166 "at %L must be a scalar integer expression",
8169 /* Further checking is not necessary because this SELECT was built
8170 by the compiler, so it should always be OK. Just move the
8171 case_expr from expr2 to expr so that we can handle computed
8172 GOTOs as normal SELECTs from here on. */
8173 code
->expr1
= code
->expr2
;
8178 case_expr
= code
->expr1
;
8179 type
= case_expr
->ts
.type
;
8182 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8184 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8185 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8187 /* Punt. Going on here just produce more garbage error messages. */
8192 if (!select_type
&& case_expr
->rank
!= 0)
8194 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8195 "expression", &case_expr
->where
);
8201 /* Raise a warning if an INTEGER case value exceeds the range of
8202 the case-expr. Later, all expressions will be promoted to the
8203 largest kind of all case-labels. */
8205 if (type
== BT_INTEGER
)
8206 for (body
= code
->block
; body
; body
= body
->block
)
8207 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8210 && gfc_check_integer_range (cp
->low
->value
.integer
,
8211 case_expr
->ts
.kind
) != ARITH_OK
)
8212 gfc_warning (0, "Expression in CASE statement at %L is "
8213 "not in the range of %s", &cp
->low
->where
,
8214 gfc_typename (&case_expr
->ts
));
8217 && cp
->low
!= cp
->high
8218 && gfc_check_integer_range (cp
->high
->value
.integer
,
8219 case_expr
->ts
.kind
) != ARITH_OK
)
8220 gfc_warning (0, "Expression in CASE statement at %L is "
8221 "not in the range of %s", &cp
->high
->where
,
8222 gfc_typename (&case_expr
->ts
));
8225 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8226 of the SELECT CASE expression and its CASE values. Walk the lists
8227 of case values, and if we find a mismatch, promote case_expr to
8228 the appropriate kind. */
8230 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8232 for (body
= code
->block
; body
; body
= body
->block
)
8234 /* Walk the case label list. */
8235 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8237 /* Intercept the DEFAULT case. It does not have a kind. */
8238 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8241 /* Unreachable case ranges are discarded, so ignore. */
8242 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8243 && cp
->low
!= cp
->high
8244 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8248 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8249 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8251 if (cp
->high
!= NULL
8252 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8253 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8258 /* Assume there is no DEFAULT case. */
8259 default_case
= NULL
;
8264 for (body
= code
->block
; body
; body
= body
->block
)
8266 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8268 seen_unreachable
= 0;
8270 /* Walk the case label list, making sure that all case labels
8272 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8274 /* Count the number of cases in the whole construct. */
8277 /* Intercept the DEFAULT case. */
8278 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8280 if (default_case
!= NULL
)
8282 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8283 "by a second DEFAULT CASE at %L",
8284 &default_case
->where
, &cp
->where
);
8295 /* Deal with single value cases and case ranges. Errors are
8296 issued from the validation function. */
8297 if (!validate_case_label_expr (cp
->low
, case_expr
)
8298 || !validate_case_label_expr (cp
->high
, case_expr
))
8304 if (type
== BT_LOGICAL
8305 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8306 || cp
->low
!= cp
->high
))
8308 gfc_error ("Logical range in CASE statement at %L is not "
8309 "allowed", &cp
->low
->where
);
8314 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8317 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8318 if (value
& seen_logical
)
8320 gfc_error ("Constant logical value in CASE statement "
8321 "is repeated at %L",
8326 seen_logical
|= value
;
8329 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8330 && cp
->low
!= cp
->high
8331 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8333 if (warn_surprising
)
8334 gfc_warning (OPT_Wsurprising
,
8335 "Range specification at %L can never be matched",
8338 cp
->unreachable
= 1;
8339 seen_unreachable
= 1;
8343 /* If the case range can be matched, it can also overlap with
8344 other cases. To make sure it does not, we put it in a
8345 double linked list here. We sort that with a merge sort
8346 later on to detect any overlapping cases. */
8350 head
->right
= head
->left
= NULL
;
8355 tail
->right
->left
= tail
;
8362 /* It there was a failure in the previous case label, give up
8363 for this case label list. Continue with the next block. */
8367 /* See if any case labels that are unreachable have been seen.
8368 If so, we eliminate them. This is a bit of a kludge because
8369 the case lists for a single case statement (label) is a
8370 single forward linked lists. */
8371 if (seen_unreachable
)
8373 /* Advance until the first case in the list is reachable. */
8374 while (body
->ext
.block
.case_list
!= NULL
8375 && body
->ext
.block
.case_list
->unreachable
)
8377 gfc_case
*n
= body
->ext
.block
.case_list
;
8378 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8380 gfc_free_case_list (n
);
8383 /* Strip all other unreachable cases. */
8384 if (body
->ext
.block
.case_list
)
8386 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8388 if (cp
->next
->unreachable
)
8390 gfc_case
*n
= cp
->next
;
8391 cp
->next
= cp
->next
->next
;
8393 gfc_free_case_list (n
);
8400 /* See if there were overlapping cases. If the check returns NULL,
8401 there was overlap. In that case we don't do anything. If head
8402 is non-NULL, we prepend the DEFAULT case. The sorted list can
8403 then used during code generation for SELECT CASE constructs with
8404 a case expression of a CHARACTER type. */
8407 head
= check_case_overlap (head
);
8409 /* Prepend the default_case if it is there. */
8410 if (head
!= NULL
&& default_case
)
8412 default_case
->left
= NULL
;
8413 default_case
->right
= head
;
8414 head
->left
= default_case
;
8418 /* Eliminate dead blocks that may be the result if we've seen
8419 unreachable case labels for a block. */
8420 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8422 if (body
->block
->ext
.block
.case_list
== NULL
)
8424 /* Cut the unreachable block from the code chain. */
8425 gfc_code
*c
= body
->block
;
8426 body
->block
= c
->block
;
8428 /* Kill the dead block, but not the blocks below it. */
8430 gfc_free_statements (c
);
8434 /* More than two cases is legal but insane for logical selects.
8435 Issue a warning for it. */
8436 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8437 gfc_warning (OPT_Wsurprising
,
8438 "Logical SELECT CASE block at %L has more that two cases",
8443 /* Check if a derived type is extensible. */
8446 gfc_type_is_extensible (gfc_symbol
*sym
)
8448 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8449 || (sym
->attr
.is_class
8450 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8455 resolve_types (gfc_namespace
*ns
);
8457 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8458 correct as well as possibly the array-spec. */
8461 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8465 gcc_assert (sym
->assoc
);
8466 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8468 /* If this is for SELECT TYPE, the target may not yet be set. In that
8469 case, return. Resolution will be called later manually again when
8471 target
= sym
->assoc
->target
;
8474 gcc_assert (!sym
->assoc
->dangling
);
8476 if (resolve_target
&& !gfc_resolve_expr (target
))
8479 /* For variable targets, we get some attributes from the target. */
8480 if (target
->expr_type
== EXPR_VARIABLE
)
8484 gcc_assert (target
->symtree
);
8485 tsym
= target
->symtree
->n
.sym
;
8487 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8488 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8490 sym
->attr
.target
= tsym
->attr
.target
8491 || gfc_expr_attr (target
).pointer
;
8492 if (is_subref_array (target
))
8493 sym
->attr
.subref_array_pointer
= 1;
8496 if (target
->expr_type
== EXPR_NULL
)
8498 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8501 else if (target
->ts
.type
== BT_UNKNOWN
)
8503 gfc_error ("Selector at %L has no type", &target
->where
);
8507 /* Get type if this was not already set. Note that it can be
8508 some other type than the target in case this is a SELECT TYPE
8509 selector! So we must not update when the type is already there. */
8510 if (sym
->ts
.type
== BT_UNKNOWN
)
8511 sym
->ts
= target
->ts
;
8513 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8515 /* See if this is a valid association-to-variable. */
8516 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8517 && !gfc_has_vector_subscript (target
));
8519 /* Finally resolve if this is an array or not. */
8520 if (sym
->attr
.dimension
&& target
->rank
== 0)
8522 /* primary.c makes the assumption that a reference to an associate
8523 name followed by a left parenthesis is an array reference. */
8524 if (sym
->ts
.type
!= BT_CHARACTER
)
8525 gfc_error ("Associate-name %qs at %L is used as array",
8526 sym
->name
, &sym
->declared_at
);
8527 sym
->attr
.dimension
= 0;
8532 /* We cannot deal with class selectors that need temporaries. */
8533 if (target
->ts
.type
== BT_CLASS
8534 && gfc_ref_needs_temporary_p (target
->ref
))
8536 gfc_error ("CLASS selector at %L needs a temporary which is not "
8537 "yet implemented", &target
->where
);
8541 if (target
->ts
.type
== BT_CLASS
)
8542 gfc_fix_class_refs (target
);
8544 if (target
->rank
!= 0)
8547 /* The rank may be incorrectly guessed at parsing, therefore make sure
8548 it is corrected now. */
8549 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8552 sym
->as
= gfc_get_array_spec ();
8554 as
->rank
= target
->rank
;
8555 as
->type
= AS_DEFERRED
;
8556 as
->corank
= gfc_get_corank (target
);
8557 sym
->attr
.dimension
= 1;
8558 if (as
->corank
!= 0)
8559 sym
->attr
.codimension
= 1;
8564 /* target's rank is 0, but the type of the sym is still array valued,
8565 which has to be corrected. */
8566 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8569 symbol_attribute attr
;
8570 /* The associated variable's type is still the array type
8571 correct this now. */
8572 gfc_typespec
*ts
= &target
->ts
;
8575 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8580 ts
= &ref
->u
.c
.component
->ts
;
8583 if (ts
->type
== BT_CLASS
)
8584 ts
= &ts
->u
.derived
->components
->ts
;
8590 /* Create a scalar instance of the current class type. Because the
8591 rank of a class array goes into its name, the type has to be
8592 rebuild. The alternative of (re-)setting just the attributes
8593 and as in the current type, destroys the type also in other
8597 sym
->ts
.type
= BT_CLASS
;
8598 attr
= CLASS_DATA (sym
)->attr
;
8600 attr
.associate_var
= 1;
8601 attr
.dimension
= attr
.codimension
= 0;
8602 attr
.class_pointer
= 1;
8603 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8605 /* Make sure the _vptr is set. */
8606 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8607 if (c
->ts
.u
.derived
== NULL
)
8608 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8609 CLASS_DATA (sym
)->attr
.pointer
= 1;
8610 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8611 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8612 gfc_commit_symbol (sym
->ts
.u
.derived
);
8613 /* _vptr now has the _vtab in it, change it to the _vtype. */
8614 if (c
->ts
.u
.derived
->attr
.vtab
)
8615 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8616 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8617 resolve_types (c
->ts
.u
.derived
->ns
);
8621 /* Mark this as an associate variable. */
8622 sym
->attr
.associate_var
= 1;
8624 /* Fix up the type-spec for CHARACTER types. */
8625 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8628 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8630 if (!sym
->ts
.u
.cl
->length
&& !sym
->ts
.deferred
)
8631 sym
->ts
.u
.cl
->length
8632 = gfc_get_int_expr (gfc_default_integer_kind
,
8633 NULL
, target
->value
.character
.length
);
8636 /* If the target is a good class object, so is the associate variable. */
8637 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8638 sym
->attr
.class_ok
= 1;
8642 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8643 array reference, where necessary. The symbols are artificial and so
8644 the dimension attribute and arrayspec can also be set. In addition,
8645 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8646 This is corrected here as well.*/
8649 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8650 int rank
, gfc_ref
*ref
)
8652 gfc_ref
*nref
= (*expr1
)->ref
;
8653 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8654 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8655 (*expr1
)->rank
= rank
;
8656 if (sym1
->ts
.type
== BT_CLASS
)
8658 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8659 (*expr1
)->ts
= sym1
->ts
;
8661 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8662 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8663 CLASS_DATA (sym1
)->as
8664 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8668 sym1
->attr
.dimension
= 1;
8669 if (sym1
->as
== NULL
&& sym2
)
8670 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8673 for (; nref
; nref
= nref
->next
)
8674 if (nref
->next
== NULL
)
8677 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8678 nref
->next
= gfc_copy_ref (ref
);
8679 else if (ref
&& !nref
)
8680 (*expr1
)->ref
= gfc_copy_ref (ref
);
8685 build_loc_call (gfc_expr
*sym_expr
)
8688 loc_call
= gfc_get_expr ();
8689 loc_call
->expr_type
= EXPR_FUNCTION
;
8690 gfc_get_sym_tree ("loc", gfc_current_ns
, &loc_call
->symtree
, false);
8691 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8692 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8693 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8694 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8695 loc_call
->ts
.type
= BT_INTEGER
;
8696 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8697 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8698 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8699 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8700 loc_call
->where
= sym_expr
->where
;
8704 /* Resolve a SELECT TYPE statement. */
8707 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8709 gfc_symbol
*selector_type
;
8710 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8711 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8714 char name
[GFC_MAX_SYMBOL_LEN
];
8719 gfc_ref
* ref
= NULL
;
8720 gfc_expr
*selector_expr
= NULL
;
8722 ns
= code
->ext
.block
.ns
;
8725 /* Check for F03:C813. */
8726 if (code
->expr1
->ts
.type
!= BT_CLASS
8727 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8729 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8730 "at %L", &code
->loc
);
8734 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8739 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8740 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8741 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8743 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8744 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8746 /* F2008: C803 The selector expression must not be coindexed. */
8747 if (gfc_is_coindexed (code
->expr2
))
8749 gfc_error ("Selector at %L must not be coindexed",
8750 &code
->expr2
->where
);
8757 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8759 if (gfc_is_coindexed (code
->expr1
))
8761 gfc_error ("Selector at %L must not be coindexed",
8762 &code
->expr1
->where
);
8767 /* Loop over TYPE IS / CLASS IS cases. */
8768 for (body
= code
->block
; body
; body
= body
->block
)
8770 c
= body
->ext
.block
.case_list
;
8774 /* Check for repeated cases. */
8775 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8777 gfc_case
*d
= tail
->ext
.block
.case_list
;
8781 if (c
->ts
.type
== d
->ts
.type
8782 && ((c
->ts
.type
== BT_DERIVED
8783 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8784 && !strcmp (c
->ts
.u
.derived
->name
,
8785 d
->ts
.u
.derived
->name
))
8786 || c
->ts
.type
== BT_UNKNOWN
8787 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8788 && c
->ts
.kind
== d
->ts
.kind
)))
8790 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8791 &c
->where
, &d
->where
);
8797 /* Check F03:C815. */
8798 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8799 && !selector_type
->attr
.unlimited_polymorphic
8800 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8802 gfc_error ("Derived type %qs at %L must be extensible",
8803 c
->ts
.u
.derived
->name
, &c
->where
);
8808 /* Check F03:C816. */
8809 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8810 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8811 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8813 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8814 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8815 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8817 gfc_error ("Unexpected intrinsic type %qs at %L",
8818 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8823 /* Check F03:C814. */
8824 if (c
->ts
.type
== BT_CHARACTER
8825 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8827 gfc_error ("The type-spec at %L shall specify that each length "
8828 "type parameter is assumed", &c
->where
);
8833 /* Intercept the DEFAULT case. */
8834 if (c
->ts
.type
== BT_UNKNOWN
)
8836 /* Check F03:C818. */
8839 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8840 "by a second DEFAULT CASE at %L",
8841 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8846 default_case
= body
;
8853 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8854 target if present. If there are any EXIT statements referring to the
8855 SELECT TYPE construct, this is no problem because the gfc_code
8856 reference stays the same and EXIT is equally possible from the BLOCK
8857 it is changed to. */
8858 code
->op
= EXEC_BLOCK
;
8861 gfc_association_list
* assoc
;
8863 assoc
= gfc_get_association_list ();
8864 assoc
->st
= code
->expr1
->symtree
;
8865 assoc
->target
= gfc_copy_expr (code
->expr2
);
8866 assoc
->target
->where
= code
->expr2
->where
;
8867 /* assoc->variable will be set by resolve_assoc_var. */
8869 code
->ext
.block
.assoc
= assoc
;
8870 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8872 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8875 code
->ext
.block
.assoc
= NULL
;
8877 /* Ensure that the selector rank and arrayspec are available to
8878 correct expressions in which they might be missing. */
8879 if (code
->expr2
&& code
->expr2
->rank
)
8881 rank
= code
->expr2
->rank
;
8882 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8883 if (ref
->next
== NULL
)
8885 if (ref
&& ref
->type
== REF_ARRAY
)
8886 ref
= gfc_copy_ref (ref
);
8888 /* Fixup expr1 if necessary. */
8890 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8892 else if (code
->expr1
->rank
)
8894 rank
= code
->expr1
->rank
;
8895 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8896 if (ref
->next
== NULL
)
8898 if (ref
&& ref
->type
== REF_ARRAY
)
8899 ref
= gfc_copy_ref (ref
);
8902 /* Add EXEC_SELECT to switch on type. */
8903 new_st
= gfc_get_code (code
->op
);
8904 new_st
->expr1
= code
->expr1
;
8905 new_st
->expr2
= code
->expr2
;
8906 new_st
->block
= code
->block
;
8907 code
->expr1
= code
->expr2
= NULL
;
8912 ns
->code
->next
= new_st
;
8914 code
->op
= EXEC_SELECT_TYPE
;
8916 /* Use the intrinsic LOC function to generate an integer expression
8917 for the vtable of the selector. Note that the rank of the selector
8918 expression has to be set to zero. */
8919 gfc_add_vptr_component (code
->expr1
);
8920 code
->expr1
->rank
= 0;
8921 code
->expr1
= build_loc_call (code
->expr1
);
8922 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8924 /* Loop over TYPE IS / CLASS IS cases. */
8925 for (body
= code
->block
; body
; body
= body
->block
)
8929 c
= body
->ext
.block
.case_list
;
8931 /* Generate an index integer expression for address of the
8932 TYPE/CLASS vtable and store it in c->low. The hash expression
8933 is stored in c->high and is used to resolve intrinsic cases. */
8934 if (c
->ts
.type
!= BT_UNKNOWN
)
8936 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8938 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8940 c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
8941 c
->ts
.u
.derived
->hash_value
);
8945 vtab
= gfc_find_vtab (&c
->ts
);
8946 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8947 e
= CLASS_DATA (vtab
)->initializer
;
8948 c
->high
= gfc_copy_expr (e
);
8951 e
= gfc_lval_expr_from_sym (vtab
);
8952 c
->low
= build_loc_call (e
);
8957 /* Associate temporary to selector. This should only be done
8958 when this case is actually true, so build a new ASSOCIATE
8959 that does precisely this here (instead of using the
8962 if (c
->ts
.type
== BT_CLASS
)
8963 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
8964 else if (c
->ts
.type
== BT_DERIVED
)
8965 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
8966 else if (c
->ts
.type
== BT_CHARACTER
)
8968 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
8969 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8970 charlen
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
8971 sprintf (name
, "__tmp_%s_%d_%d", gfc_basic_typename (c
->ts
.type
),
8972 charlen
, c
->ts
.kind
);
8975 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
8978 st
= gfc_find_symtree (ns
->sym_root
, name
);
8979 gcc_assert (st
->n
.sym
->assoc
);
8980 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
8981 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
8982 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
8984 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
8985 /* Fixup the target expression if necessary. */
8987 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
8990 new_st
= gfc_get_code (EXEC_BLOCK
);
8991 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
8992 new_st
->ext
.block
.ns
->code
= body
->next
;
8993 body
->next
= new_st
;
8995 /* Chain in the new list only if it is marked as dangling. Otherwise
8996 there is a CASE label overlap and this is already used. Just ignore,
8997 the error is diagnosed elsewhere. */
8998 if (st
->n
.sym
->assoc
->dangling
)
9000 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9001 st
->n
.sym
->assoc
->dangling
= 0;
9004 resolve_assoc_var (st
->n
.sym
, false);
9007 /* Take out CLASS IS cases for separate treatment. */
9009 while (body
&& body
->block
)
9011 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9013 /* Add to class_is list. */
9014 if (class_is
== NULL
)
9016 class_is
= body
->block
;
9021 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9022 tail
->block
= body
->block
;
9025 /* Remove from EXEC_SELECT list. */
9026 body
->block
= body
->block
->block
;
9039 /* Add a default case to hold the CLASS IS cases. */
9040 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9041 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9043 tail
->ext
.block
.case_list
= gfc_get_case ();
9044 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9046 default_case
= tail
;
9049 /* More than one CLASS IS block? */
9050 if (class_is
->block
)
9054 /* Sort CLASS IS blocks by extension level. */
9058 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9061 /* F03:C817 (check for doubles). */
9062 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9063 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9065 gfc_error ("Double CLASS IS block in SELECT TYPE "
9067 &c2
->ext
.block
.case_list
->where
);
9070 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9071 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9074 (*c1
)->block
= c2
->block
;
9084 /* Generate IF chain. */
9085 if_st
= gfc_get_code (EXEC_IF
);
9087 for (body
= class_is
; body
; body
= body
->block
)
9089 new_st
->block
= gfc_get_code (EXEC_IF
);
9090 new_st
= new_st
->block
;
9091 /* Set up IF condition: Call _gfortran_is_extension_of. */
9092 new_st
->expr1
= gfc_get_expr ();
9093 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9094 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9095 new_st
->expr1
->ts
.kind
= 4;
9096 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9097 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9098 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9099 /* Set up arguments. */
9100 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9101 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9102 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9103 new_st
->expr1
->where
= code
->loc
;
9104 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9105 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9106 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9107 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9108 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9109 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9110 new_st
->next
= body
->next
;
9112 if (default_case
->next
)
9114 new_st
->block
= gfc_get_code (EXEC_IF
);
9115 new_st
= new_st
->block
;
9116 new_st
->next
= default_case
->next
;
9119 /* Replace CLASS DEFAULT code by the IF chain. */
9120 default_case
->next
= if_st
;
9123 /* Resolve the internal code. This can not be done earlier because
9124 it requires that the sym->assoc of selectors is set already. */
9125 gfc_current_ns
= ns
;
9126 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9127 gfc_current_ns
= old_ns
;
9134 /* Resolve a transfer statement. This is making sure that:
9135 -- a derived type being transferred has only non-pointer components
9136 -- a derived type being transferred doesn't have private components, unless
9137 it's being transferred from the module where the type was defined
9138 -- we're not trying to transfer a whole assumed size array. */
9141 resolve_transfer (gfc_code
*code
)
9144 gfc_symbol
*sym
, *derived
;
9148 bool formatted
= false;
9149 gfc_dt
*dt
= code
->ext
.dt
;
9150 gfc_symbol
*dtio_sub
= NULL
;
9154 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9155 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9156 exp
= exp
->value
.op
.op1
;
9158 if (exp
&& exp
->expr_type
== EXPR_NULL
9161 gfc_error ("Invalid context for NULL () intrinsic at %L",
9166 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9167 && exp
->expr_type
!= EXPR_FUNCTION
9168 && exp
->expr_type
!= EXPR_STRUCTURE
))
9171 /* If we are reading, the variable will be changed. Note that
9172 code->ext.dt may be NULL if the TRANSFER is related to
9173 an INQUIRE statement -- but in this case, we are not reading, either. */
9174 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9175 && !gfc_check_vardef_context (exp
, false, false, false,
9179 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9181 /* Go to actual component transferred. */
9182 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9183 if (ref
->type
== REF_COMPONENT
)
9184 ts
= &ref
->u
.c
.component
->ts
;
9186 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9187 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9189 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9190 derived
= ts
->u
.derived
;
9192 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9194 if (dt
->format_expr
)
9197 fmt
= gfc_widechar_to_char (dt
->format_expr
->value
.character
.string
,
9199 if (strtok (fmt
, "DT") != NULL
)
9202 else if (dt
->format_label
== &format_asterisk
)
9204 /* List directed io must call the formatted DTIO procedure. */
9208 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9209 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9210 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9212 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9215 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9216 /* Check to see if this is a nested DTIO call, with the
9217 dummy as the io-list object. */
9218 if (sym
&& sym
== dtio_sub
&& sym
->formal
9219 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9220 && exp
->ref
== NULL
)
9222 if (!sym
->attr
.recursive
)
9224 gfc_error ("DTIO %s procedure at %L must be recursive",
9225 sym
->name
, &sym
->declared_at
);
9232 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9234 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9235 "it is processed by a defined input/output procedure",
9240 if (ts
->type
== BT_DERIVED
)
9242 /* Check that transferred derived type doesn't contain POINTER
9243 components unless it is processed by a defined input/output
9245 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9247 gfc_error ("Data transfer element at %L cannot have POINTER "
9248 "components unless it is processed by a defined "
9249 "input/output procedure", &code
->loc
);
9254 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9256 gfc_error ("Data transfer element at %L cannot have "
9257 "procedure pointer components", &code
->loc
);
9261 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9263 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9264 "components unless it is processed by a defined "
9265 "input/output procedure", &code
->loc
);
9269 /* C_PTR and C_FUNPTR have private components which means they can not
9270 be printed. However, if -std=gnu and not -pedantic, allow
9271 the component to be printed to help debugging. */
9272 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9274 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9275 "cannot have PRIVATE components", &code
->loc
))
9278 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9280 gfc_error ("Data transfer element at %L cannot have "
9281 "PRIVATE components unless it is processed by "
9282 "a defined input/output procedure", &code
->loc
);
9287 if (exp
->expr_type
== EXPR_STRUCTURE
)
9290 sym
= exp
->symtree
->n
.sym
;
9292 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9293 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9295 gfc_error ("Data transfer element at %L cannot be a full reference to "
9296 "an assumed-size array", &code
->loc
);
9300 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9301 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9305 /*********** Toplevel code resolution subroutines ***********/
9307 /* Find the set of labels that are reachable from this block. We also
9308 record the last statement in each block. */
9311 find_reachable_labels (gfc_code
*block
)
9318 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9320 /* Collect labels in this block. We don't keep those corresponding
9321 to END {IF|SELECT}, these are checked in resolve_branch by going
9322 up through the code_stack. */
9323 for (c
= block
; c
; c
= c
->next
)
9325 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9326 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9329 /* Merge with labels from parent block. */
9332 gcc_assert (cs_base
->prev
->reachable_labels
);
9333 bitmap_ior_into (cs_base
->reachable_labels
,
9334 cs_base
->prev
->reachable_labels
);
9340 resolve_lock_unlock_event (gfc_code
*code
)
9342 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9343 && code
->expr1
->value
.function
.isym
9344 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9345 remove_caf_get_intrinsic (code
->expr1
);
9347 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9348 && (code
->expr1
->ts
.type
!= BT_DERIVED
9349 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9350 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9351 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9352 || code
->expr1
->rank
!= 0
9353 || (!gfc_is_coarray (code
->expr1
) &&
9354 !gfc_is_coindexed (code
->expr1
))))
9355 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9356 &code
->expr1
->where
);
9357 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9358 && (code
->expr1
->ts
.type
!= BT_DERIVED
9359 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9360 || code
->expr1
->ts
.u
.derived
->from_intmod
9361 != INTMOD_ISO_FORTRAN_ENV
9362 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9363 != ISOFORTRAN_EVENT_TYPE
9364 || code
->expr1
->rank
!= 0))
9365 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9366 &code
->expr1
->where
);
9367 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9368 && !gfc_is_coindexed (code
->expr1
))
9369 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9370 &code
->expr1
->where
);
9371 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9372 gfc_error ("Event variable argument at %L must be a coarray but not "
9373 "coindexed", &code
->expr1
->where
);
9377 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9378 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9379 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9380 &code
->expr2
->where
);
9383 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9384 _("STAT variable")))
9389 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9390 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9391 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9392 &code
->expr3
->where
);
9395 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9396 _("ERRMSG variable")))
9399 /* Check for LOCK the ACQUIRED_LOCK. */
9400 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9401 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9402 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9403 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9404 "variable", &code
->expr4
->where
);
9406 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9407 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9408 _("ACQUIRED_LOCK variable")))
9411 /* Check for EVENT WAIT the UNTIL_COUNT. */
9412 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9414 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9415 || code
->expr4
->rank
!= 0)
9416 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9417 "expression", &code
->expr4
->where
);
9423 resolve_critical (gfc_code
*code
)
9425 gfc_symtree
*symtree
;
9426 gfc_symbol
*lock_type
;
9427 char name
[GFC_MAX_SYMBOL_LEN
];
9428 static int serial
= 0;
9430 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9433 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9434 GFC_PREFIX ("lock_type"));
9436 lock_type
= symtree
->n
.sym
;
9439 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9442 lock_type
= symtree
->n
.sym
;
9443 lock_type
->attr
.flavor
= FL_DERIVED
;
9444 lock_type
->attr
.zero_comp
= 1;
9445 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9446 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9449 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9450 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9453 code
->resolved_sym
= symtree
->n
.sym
;
9454 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9455 symtree
->n
.sym
->attr
.referenced
= 1;
9456 symtree
->n
.sym
->attr
.artificial
= 1;
9457 symtree
->n
.sym
->attr
.codimension
= 1;
9458 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9459 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9460 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9461 symtree
->n
.sym
->as
->corank
= 1;
9462 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9463 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9464 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9466 gfc_commit_symbols();
9471 resolve_sync (gfc_code
*code
)
9473 /* Check imageset. The * case matches expr1 == NULL. */
9476 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9477 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9478 "INTEGER expression", &code
->expr1
->where
);
9479 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9480 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9481 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9482 &code
->expr1
->where
);
9483 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9484 && gfc_simplify_expr (code
->expr1
, 0))
9486 gfc_constructor
*cons
;
9487 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9488 for (; cons
; cons
= gfc_constructor_next (cons
))
9489 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9490 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9491 gfc_error ("Imageset argument at %L must between 1 and "
9492 "num_images()", &cons
->expr
->where
);
9498 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9499 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9500 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9501 &code
->expr2
->where
);
9505 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9506 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9507 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9508 &code
->expr3
->where
);
9512 /* Given a branch to a label, see if the branch is conforming.
9513 The code node describes where the branch is located. */
9516 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9523 /* Step one: is this a valid branching target? */
9525 if (label
->defined
== ST_LABEL_UNKNOWN
)
9527 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9532 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9534 gfc_error ("Statement at %L is not a valid branch target statement "
9535 "for the branch statement at %L", &label
->where
, &code
->loc
);
9539 /* Step two: make sure this branch is not a branch to itself ;-) */
9541 if (code
->here
== label
)
9544 "Branch at %L may result in an infinite loop", &code
->loc
);
9548 /* Step three: See if the label is in the same block as the
9549 branching statement. The hard work has been done by setting up
9550 the bitmap reachable_labels. */
9552 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9554 /* Check now whether there is a CRITICAL construct; if so, check
9555 whether the label is still visible outside of the CRITICAL block,
9556 which is invalid. */
9557 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9559 if (stack
->current
->op
== EXEC_CRITICAL
9560 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9561 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9562 "label at %L", &code
->loc
, &label
->where
);
9563 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9564 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9565 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9566 "for label at %L", &code
->loc
, &label
->where
);
9572 /* Step four: If we haven't found the label in the bitmap, it may
9573 still be the label of the END of the enclosing block, in which
9574 case we find it by going up the code_stack. */
9576 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9578 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9580 if (stack
->current
->op
== EXEC_CRITICAL
)
9582 /* Note: A label at END CRITICAL does not leave the CRITICAL
9583 construct as END CRITICAL is still part of it. */
9584 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9585 " at %L", &code
->loc
, &label
->where
);
9588 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9590 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9591 "label at %L", &code
->loc
, &label
->where
);
9598 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9602 /* The label is not in an enclosing block, so illegal. This was
9603 allowed in Fortran 66, so we allow it as extension. No
9604 further checks are necessary in this case. */
9605 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9606 "as the GOTO statement at %L", &label
->where
,
9612 /* Check whether EXPR1 has the same shape as EXPR2. */
9615 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9617 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9618 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9619 bool result
= false;
9622 /* Compare the rank. */
9623 if (expr1
->rank
!= expr2
->rank
)
9626 /* Compare the size of each dimension. */
9627 for (i
=0; i
<expr1
->rank
; i
++)
9629 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9632 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9635 if (mpz_cmp (shape
[i
], shape2
[i
]))
9639 /* When either of the two expression is an assumed size array, we
9640 ignore the comparison of dimension sizes. */
9645 gfc_clear_shape (shape
, i
);
9646 gfc_clear_shape (shape2
, i
);
9651 /* Check whether a WHERE assignment target or a WHERE mask expression
9652 has the same shape as the outmost WHERE mask expression. */
9655 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9661 cblock
= code
->block
;
9663 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9664 In case of nested WHERE, only the outmost one is stored. */
9665 if (mask
== NULL
) /* outmost WHERE */
9667 else /* inner WHERE */
9674 /* Check if the mask-expr has a consistent shape with the
9675 outmost WHERE mask-expr. */
9676 if (!resolve_where_shape (cblock
->expr1
, e
))
9677 gfc_error ("WHERE mask at %L has inconsistent shape",
9678 &cblock
->expr1
->where
);
9681 /* the assignment statement of a WHERE statement, or the first
9682 statement in where-body-construct of a WHERE construct */
9683 cnext
= cblock
->next
;
9688 /* WHERE assignment statement */
9691 /* Check shape consistent for WHERE assignment target. */
9692 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9693 gfc_error ("WHERE assignment target at %L has "
9694 "inconsistent shape", &cnext
->expr1
->where
);
9698 case EXEC_ASSIGN_CALL
:
9699 resolve_call (cnext
);
9700 if (!cnext
->resolved_sym
->attr
.elemental
)
9701 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9702 &cnext
->ext
.actual
->expr
->where
);
9705 /* WHERE or WHERE construct is part of a where-body-construct */
9707 resolve_where (cnext
, e
);
9711 gfc_error ("Unsupported statement inside WHERE at %L",
9714 /* the next statement within the same where-body-construct */
9715 cnext
= cnext
->next
;
9717 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9718 cblock
= cblock
->block
;
9723 /* Resolve assignment in FORALL construct.
9724 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9725 FORALL index variables. */
9728 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9732 for (n
= 0; n
< nvar
; n
++)
9734 gfc_symbol
*forall_index
;
9736 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9738 /* Check whether the assignment target is one of the FORALL index
9740 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9741 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9742 gfc_error ("Assignment to a FORALL index variable at %L",
9743 &code
->expr1
->where
);
9746 /* If one of the FORALL index variables doesn't appear in the
9747 assignment variable, then there could be a many-to-one
9748 assignment. Emit a warning rather than an error because the
9749 mask could be resolving this problem. */
9750 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9751 gfc_warning (0, "The FORALL with index %qs is not used on the "
9752 "left side of the assignment at %L and so might "
9753 "cause multiple assignment to this object",
9754 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9760 /* Resolve WHERE statement in FORALL construct. */
9763 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9764 gfc_expr
**var_expr
)
9769 cblock
= code
->block
;
9772 /* the assignment statement of a WHERE statement, or the first
9773 statement in where-body-construct of a WHERE construct */
9774 cnext
= cblock
->next
;
9779 /* WHERE assignment statement */
9781 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9784 /* WHERE operator assignment statement */
9785 case EXEC_ASSIGN_CALL
:
9786 resolve_call (cnext
);
9787 if (!cnext
->resolved_sym
->attr
.elemental
)
9788 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9789 &cnext
->ext
.actual
->expr
->where
);
9792 /* WHERE or WHERE construct is part of a where-body-construct */
9794 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9798 gfc_error ("Unsupported statement inside WHERE at %L",
9801 /* the next statement within the same where-body-construct */
9802 cnext
= cnext
->next
;
9804 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9805 cblock
= cblock
->block
;
9810 /* Traverse the FORALL body to check whether the following errors exist:
9811 1. For assignment, check if a many-to-one assignment happens.
9812 2. For WHERE statement, check the WHERE body to see if there is any
9813 many-to-one assignment. */
9816 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9820 c
= code
->block
->next
;
9826 case EXEC_POINTER_ASSIGN
:
9827 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9830 case EXEC_ASSIGN_CALL
:
9834 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9835 there is no need to handle it here. */
9839 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9844 /* The next statement in the FORALL body. */
9850 /* Counts the number of iterators needed inside a forall construct, including
9851 nested forall constructs. This is used to allocate the needed memory
9852 in gfc_resolve_forall. */
9855 gfc_count_forall_iterators (gfc_code
*code
)
9857 int max_iters
, sub_iters
, current_iters
;
9858 gfc_forall_iterator
*fa
;
9860 gcc_assert(code
->op
== EXEC_FORALL
);
9864 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9867 code
= code
->block
->next
;
9871 if (code
->op
== EXEC_FORALL
)
9873 sub_iters
= gfc_count_forall_iterators (code
);
9874 if (sub_iters
> max_iters
)
9875 max_iters
= sub_iters
;
9880 return current_iters
+ max_iters
;
9884 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9885 gfc_resolve_forall_body to resolve the FORALL body. */
9888 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9890 static gfc_expr
**var_expr
;
9891 static int total_var
= 0;
9892 static int nvar
= 0;
9893 int i
, old_nvar
, tmp
;
9894 gfc_forall_iterator
*fa
;
9898 /* Start to resolve a FORALL construct */
9899 if (forall_save
== 0)
9901 /* Count the total number of FORALL indices in the nested FORALL
9902 construct in order to allocate the VAR_EXPR with proper size. */
9903 total_var
= gfc_count_forall_iterators (code
);
9905 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9906 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9909 /* The information about FORALL iterator, including FORALL indices start, end
9910 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9911 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9913 /* Fortran 20008: C738 (R753). */
9914 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9916 gfc_error ("FORALL index-name at %L must be a scalar variable "
9917 "of type integer", &fa
->var
->where
);
9921 /* Check if any outer FORALL index name is the same as the current
9923 for (i
= 0; i
< nvar
; i
++)
9925 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9926 gfc_error ("An outer FORALL construct already has an index "
9927 "with this name %L", &fa
->var
->where
);
9930 /* Record the current FORALL index. */
9931 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9935 /* No memory leak. */
9936 gcc_assert (nvar
<= total_var
);
9939 /* Resolve the FORALL body. */
9940 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9942 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9943 gfc_resolve_blocks (code
->block
, ns
);
9947 /* Free only the VAR_EXPRs allocated in this frame. */
9948 for (i
= nvar
; i
< tmp
; i
++)
9949 gfc_free_expr (var_expr
[i
]);
9953 /* We are in the outermost FORALL construct. */
9954 gcc_assert (forall_save
== 0);
9956 /* VAR_EXPR is not needed any more. */
9963 /* Resolve a BLOCK construct statement. */
9966 resolve_block_construct (gfc_code
* code
)
9968 /* Resolve the BLOCK's namespace. */
9969 gfc_resolve (code
->ext
.block
.ns
);
9971 /* For an ASSOCIATE block, the associations (and their targets) are already
9972 resolved during resolve_symbol. */
9976 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
9980 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
9984 for (; b
; b
= b
->block
)
9986 t
= gfc_resolve_expr (b
->expr1
);
9987 if (!gfc_resolve_expr (b
->expr2
))
9993 if (t
&& b
->expr1
!= NULL
9994 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
9995 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10001 && b
->expr1
!= NULL
10002 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10003 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10008 resolve_branch (b
->label1
, b
);
10012 resolve_block_construct (b
);
10016 case EXEC_SELECT_TYPE
:
10019 case EXEC_DO_WHILE
:
10020 case EXEC_DO_CONCURRENT
:
10021 case EXEC_CRITICAL
:
10024 case EXEC_IOLENGTH
:
10028 case EXEC_OMP_ATOMIC
:
10029 case EXEC_OACC_ATOMIC
:
10031 gfc_omp_atomic_op aop
10032 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10034 /* Verify this before calling gfc_resolve_code, which might
10036 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10037 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10038 && b
->next
->next
== NULL
)
10039 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10040 && b
->next
->next
!= NULL
10041 && b
->next
->next
->op
== EXEC_ASSIGN
10042 && b
->next
->next
->next
== NULL
));
10046 case EXEC_OACC_PARALLEL_LOOP
:
10047 case EXEC_OACC_PARALLEL
:
10048 case EXEC_OACC_KERNELS_LOOP
:
10049 case EXEC_OACC_KERNELS
:
10050 case EXEC_OACC_DATA
:
10051 case EXEC_OACC_HOST_DATA
:
10052 case EXEC_OACC_LOOP
:
10053 case EXEC_OACC_UPDATE
:
10054 case EXEC_OACC_WAIT
:
10055 case EXEC_OACC_CACHE
:
10056 case EXEC_OACC_ENTER_DATA
:
10057 case EXEC_OACC_EXIT_DATA
:
10058 case EXEC_OACC_ROUTINE
:
10059 case EXEC_OMP_CRITICAL
:
10060 case EXEC_OMP_DISTRIBUTE
:
10061 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10062 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10063 case EXEC_OMP_DISTRIBUTE_SIMD
:
10065 case EXEC_OMP_DO_SIMD
:
10066 case EXEC_OMP_MASTER
:
10067 case EXEC_OMP_ORDERED
:
10068 case EXEC_OMP_PARALLEL
:
10069 case EXEC_OMP_PARALLEL_DO
:
10070 case EXEC_OMP_PARALLEL_DO_SIMD
:
10071 case EXEC_OMP_PARALLEL_SECTIONS
:
10072 case EXEC_OMP_PARALLEL_WORKSHARE
:
10073 case EXEC_OMP_SECTIONS
:
10074 case EXEC_OMP_SIMD
:
10075 case EXEC_OMP_SINGLE
:
10076 case EXEC_OMP_TARGET
:
10077 case EXEC_OMP_TARGET_DATA
:
10078 case EXEC_OMP_TARGET_ENTER_DATA
:
10079 case EXEC_OMP_TARGET_EXIT_DATA
:
10080 case EXEC_OMP_TARGET_PARALLEL
:
10081 case EXEC_OMP_TARGET_PARALLEL_DO
:
10082 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10083 case EXEC_OMP_TARGET_SIMD
:
10084 case EXEC_OMP_TARGET_TEAMS
:
10085 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10086 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10087 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10088 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10089 case EXEC_OMP_TARGET_UPDATE
:
10090 case EXEC_OMP_TASK
:
10091 case EXEC_OMP_TASKGROUP
:
10092 case EXEC_OMP_TASKLOOP
:
10093 case EXEC_OMP_TASKLOOP_SIMD
:
10094 case EXEC_OMP_TASKWAIT
:
10095 case EXEC_OMP_TASKYIELD
:
10096 case EXEC_OMP_TEAMS
:
10097 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10098 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10099 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10100 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10101 case EXEC_OMP_WORKSHARE
:
10105 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10108 gfc_resolve_code (b
->next
, ns
);
10113 /* Does everything to resolve an ordinary assignment. Returns true
10114 if this is an interface assignment. */
10116 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10125 symbol_attribute attr
;
10127 if (gfc_extend_assign (code
, ns
))
10131 if (code
->op
== EXEC_ASSIGN_CALL
)
10133 lhs
= code
->ext
.actual
->expr
;
10134 rhsptr
= &code
->ext
.actual
->next
->expr
;
10138 gfc_actual_arglist
* args
;
10139 gfc_typebound_proc
* tbp
;
10141 gcc_assert (code
->op
== EXEC_COMPCALL
);
10143 args
= code
->expr1
->value
.compcall
.actual
;
10145 rhsptr
= &args
->next
->expr
;
10147 tbp
= code
->expr1
->value
.compcall
.tbp
;
10148 gcc_assert (!tbp
->is_generic
);
10151 /* Make a temporary rhs when there is a default initializer
10152 and rhs is the same symbol as the lhs. */
10153 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10154 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10155 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10156 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10157 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10166 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10167 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10171 /* Handle the case of a BOZ literal on the RHS. */
10172 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10175 if (warn_surprising
)
10176 gfc_warning (OPT_Wsurprising
,
10177 "BOZ literal at %L is bitwise transferred "
10178 "non-integer symbol %qs", &code
->loc
,
10179 lhs
->symtree
->n
.sym
->name
);
10181 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10183 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10185 if (rc
== ARITH_UNDERFLOW
)
10186 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10187 ". This check can be disabled with the option "
10188 "%<-fno-range-check%>", &rhs
->where
);
10189 else if (rc
== ARITH_OVERFLOW
)
10190 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10191 ". This check can be disabled with the option "
10192 "%<-fno-range-check%>", &rhs
->where
);
10193 else if (rc
== ARITH_NAN
)
10194 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10195 ". This check can be disabled with the option "
10196 "%<-fno-range-check%>", &rhs
->where
);
10201 if (lhs
->ts
.type
== BT_CHARACTER
10202 && warn_character_truncation
)
10204 if (lhs
->ts
.u
.cl
!= NULL
10205 && lhs
->ts
.u
.cl
->length
!= NULL
10206 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10207 llen
= mpz_get_si (lhs
->ts
.u
.cl
->length
->value
.integer
);
10209 if (rhs
->expr_type
== EXPR_CONSTANT
)
10210 rlen
= rhs
->value
.character
.length
;
10212 else if (rhs
->ts
.u
.cl
!= NULL
10213 && rhs
->ts
.u
.cl
->length
!= NULL
10214 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10215 rlen
= mpz_get_si (rhs
->ts
.u
.cl
->length
->value
.integer
);
10217 if (rlen
&& llen
&& rlen
> llen
)
10218 gfc_warning_now (OPT_Wcharacter_truncation
,
10219 "CHARACTER expression will be truncated "
10220 "in assignment (%d/%d) at %L",
10221 llen
, rlen
, &code
->loc
);
10224 /* Ensure that a vector index expression for the lvalue is evaluated
10225 to a temporary if the lvalue symbol is referenced in it. */
10228 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10229 if (ref
->type
== REF_ARRAY
)
10231 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10232 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10233 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10234 ref
->u
.ar
.start
[n
]))
10236 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10240 if (gfc_pure (NULL
))
10242 if (lhs
->ts
.type
== BT_DERIVED
10243 && lhs
->expr_type
== EXPR_VARIABLE
10244 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10245 && rhs
->expr_type
== EXPR_VARIABLE
10246 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10247 || gfc_is_coindexed (rhs
)))
10249 /* F2008, C1283. */
10250 if (gfc_is_coindexed (rhs
))
10251 gfc_error ("Coindexed expression at %L is assigned to "
10252 "a derived type variable with a POINTER "
10253 "component in a PURE procedure",
10256 gfc_error ("The impure variable at %L is assigned to "
10257 "a derived type variable with a POINTER "
10258 "component in a PURE procedure (12.6)",
10263 /* Fortran 2008, C1283. */
10264 if (gfc_is_coindexed (lhs
))
10266 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10267 "procedure", &rhs
->where
);
10272 if (gfc_implicit_pure (NULL
))
10274 if (lhs
->expr_type
== EXPR_VARIABLE
10275 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10276 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10277 gfc_unset_implicit_pure (NULL
);
10279 if (lhs
->ts
.type
== BT_DERIVED
10280 && lhs
->expr_type
== EXPR_VARIABLE
10281 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10282 && rhs
->expr_type
== EXPR_VARIABLE
10283 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10284 || gfc_is_coindexed (rhs
)))
10285 gfc_unset_implicit_pure (NULL
);
10287 /* Fortran 2008, C1283. */
10288 if (gfc_is_coindexed (lhs
))
10289 gfc_unset_implicit_pure (NULL
);
10292 /* F2008, 7.2.1.2. */
10293 attr
= gfc_expr_attr (lhs
);
10294 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10296 if (attr
.codimension
)
10298 gfc_error ("Assignment to polymorphic coarray at %L is not "
10299 "permitted", &lhs
->where
);
10302 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10303 "polymorphic variable at %L", &lhs
->where
))
10305 if (!flag_realloc_lhs
)
10307 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10308 "requires %<-frealloc-lhs%>", &lhs
->where
);
10312 else if (lhs
->ts
.type
== BT_CLASS
)
10314 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10315 "assignment at %L - check that there is a matching specific "
10316 "subroutine for '=' operator", &lhs
->where
);
10320 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10322 /* F2008, Section 7.2.1.2. */
10323 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10325 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10326 "component in assignment at %L", &lhs
->where
);
10330 /* Assign the 'data' of a class object to a derived type. */
10331 if (lhs
->ts
.type
== BT_DERIVED
10332 && rhs
->ts
.type
== BT_CLASS
10333 && rhs
->expr_type
!= EXPR_ARRAY
)
10334 gfc_add_data_component (rhs
);
10336 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10338 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10339 && code
->expr2
->value
.function
.isym
10340 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10341 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10342 && !gfc_expr_attr (rhs
).allocatable
10343 && !gfc_has_vector_subscript (rhs
)));
10345 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10347 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10348 Additionally, insert this code when the RHS is a CAF as we then use the
10349 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10350 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10351 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10353 if (caf_convert_to_send
)
10355 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10356 && code
->expr2
->value
.function
.isym
10357 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10358 remove_caf_get_intrinsic (code
->expr2
);
10359 code
->op
= EXEC_CALL
;
10360 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10361 code
->resolved_sym
= code
->symtree
->n
.sym
;
10362 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10363 code
->resolved_sym
->attr
.intrinsic
= 1;
10364 code
->resolved_sym
->attr
.subroutine
= 1;
10365 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10366 gfc_commit_symbol (code
->resolved_sym
);
10367 code
->ext
.actual
= gfc_get_actual_arglist ();
10368 code
->ext
.actual
->expr
= lhs
;
10369 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10370 code
->ext
.actual
->next
->expr
= rhs
;
10371 code
->expr1
= NULL
;
10372 code
->expr2
= NULL
;
10379 /* Add a component reference onto an expression. */
10382 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10387 ref
= &((*ref
)->next
);
10388 *ref
= gfc_get_ref ();
10389 (*ref
)->type
= REF_COMPONENT
;
10390 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10391 (*ref
)->u
.c
.component
= c
;
10394 /* Add a full array ref, as necessary. */
10397 gfc_add_full_array_ref (e
, c
->as
);
10398 e
->rank
= c
->as
->rank
;
10403 /* Build an assignment. Keep the argument 'op' for future use, so that
10404 pointer assignments can be made. */
10407 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10408 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10410 gfc_code
*this_code
;
10412 this_code
= gfc_get_code (op
);
10413 this_code
->next
= NULL
;
10414 this_code
->expr1
= gfc_copy_expr (expr1
);
10415 this_code
->expr2
= gfc_copy_expr (expr2
);
10416 this_code
->loc
= loc
;
10417 if (comp1
&& comp2
)
10419 add_comp_ref (this_code
->expr1
, comp1
);
10420 add_comp_ref (this_code
->expr2
, comp2
);
10427 /* Makes a temporary variable expression based on the characteristics of
10428 a given variable expression. */
10431 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10433 static int serial
= 0;
10434 char name
[GFC_MAX_SYMBOL_LEN
];
10436 gfc_array_spec
*as
;
10437 gfc_array_ref
*aref
;
10440 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10441 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10442 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10448 /* Obtain the arrayspec for the temporary. */
10449 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10450 && e
->expr_type
!= EXPR_FUNCTION
10451 && e
->expr_type
!= EXPR_OP
)
10453 aref
= gfc_find_array_ref (e
);
10454 if (e
->expr_type
== EXPR_VARIABLE
10455 && e
->symtree
->n
.sym
->as
== aref
->as
)
10459 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10460 if (ref
->type
== REF_COMPONENT
10461 && ref
->u
.c
.component
->as
== aref
->as
)
10469 /* Add the attributes and the arrayspec to the temporary. */
10470 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10471 tmp
->n
.sym
->attr
.function
= 0;
10472 tmp
->n
.sym
->attr
.result
= 0;
10473 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10477 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10480 if (as
->type
== AS_DEFERRED
)
10481 tmp
->n
.sym
->attr
.allocatable
= 1;
10483 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10484 || e
->expr_type
== EXPR_FUNCTION
10485 || e
->expr_type
== EXPR_OP
))
10487 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10488 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10489 tmp
->n
.sym
->as
->rank
= e
->rank
;
10490 tmp
->n
.sym
->attr
.allocatable
= 1;
10491 tmp
->n
.sym
->attr
.dimension
= 1;
10494 tmp
->n
.sym
->attr
.dimension
= 0;
10496 gfc_set_sym_referenced (tmp
->n
.sym
);
10497 gfc_commit_symbol (tmp
->n
.sym
);
10498 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10500 /* Should the lhs be a section, use its array ref for the
10501 temporary expression. */
10502 if (aref
&& aref
->type
!= AR_FULL
)
10504 gfc_free_ref_list (e
->ref
);
10505 e
->ref
= gfc_copy_ref (ref
);
10511 /* Add one line of code to the code chain, making sure that 'head' and
10512 'tail' are appropriately updated. */
10515 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10517 gcc_assert (this_code
);
10519 *head
= *tail
= *this_code
;
10521 *tail
= gfc_append_code (*tail
, *this_code
);
10526 /* Counts the potential number of part array references that would
10527 result from resolution of typebound defined assignments. */
10530 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10533 int c_depth
= 0, t_depth
;
10535 for (c
= derived
->components
; c
; c
= c
->next
)
10537 if ((!gfc_bt_struct (c
->ts
.type
)
10539 || c
->attr
.allocatable
10540 || c
->attr
.proc_pointer_comp
10541 || c
->attr
.class_pointer
10542 || c
->attr
.proc_pointer
)
10543 && !c
->attr
.defined_assign_comp
)
10546 if (c
->as
&& c_depth
== 0)
10549 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10550 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10555 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10557 return depth
+ c_depth
;
10561 /* Implement 7.2.1.3 of the F08 standard:
10562 "An intrinsic assignment where the variable is of derived type is
10563 performed as if each component of the variable were assigned from the
10564 corresponding component of expr using pointer assignment (7.2.2) for
10565 each pointer component, defined assignment for each nonpointer
10566 nonallocatable component of a type that has a type-bound defined
10567 assignment consistent with the component, intrinsic assignment for
10568 each other nonpointer nonallocatable component, ..."
10570 The pointer assignments are taken care of by the intrinsic
10571 assignment of the structure itself. This function recursively adds
10572 defined assignments where required. The recursion is accomplished
10573 by calling gfc_resolve_code.
10575 When the lhs in a defined assignment has intent INOUT, we need a
10576 temporary for the lhs. In pseudo-code:
10578 ! Only call function lhs once.
10579 if (lhs is not a constant or an variable)
10582 ! Do the intrinsic assignment
10584 ! Now do the defined assignments
10585 do over components with typebound defined assignment [%cmp]
10586 #if one component's assignment procedure is INOUT
10588 #if expr2 non-variable
10594 t1%cmp {defined=} expr2%cmp
10600 expr1%cmp {defined=} expr2%cmp
10604 /* The temporary assignments have to be put on top of the additional
10605 code to avoid the result being changed by the intrinsic assignment.
10607 static int component_assignment_level
= 0;
10608 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10611 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10613 gfc_component
*comp1
, *comp2
;
10614 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10616 int error_count
, depth
;
10618 gfc_get_errors (NULL
, &error_count
);
10620 /* Filter out continuing processing after an error. */
10622 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10623 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10626 /* TODO: Handle more than one part array reference in assignments. */
10627 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10628 (*code
)->expr1
->rank
? 1 : 0);
10631 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10632 "done because multiple part array references would "
10633 "occur in intermediate expressions.", &(*code
)->loc
);
10637 component_assignment_level
++;
10639 /* Create a temporary so that functions get called only once. */
10640 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10641 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10643 gfc_expr
*tmp_expr
;
10645 /* Assign the rhs to the temporary. */
10646 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10647 this_code
= build_assignment (EXEC_ASSIGN
,
10648 tmp_expr
, (*code
)->expr2
,
10649 NULL
, NULL
, (*code
)->loc
);
10650 /* Add the code and substitute the rhs expression. */
10651 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10652 gfc_free_expr ((*code
)->expr2
);
10653 (*code
)->expr2
= tmp_expr
;
10656 /* Do the intrinsic assignment. This is not needed if the lhs is one
10657 of the temporaries generated here, since the intrinsic assignment
10658 to the final result already does this. */
10659 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10661 this_code
= build_assignment (EXEC_ASSIGN
,
10662 (*code
)->expr1
, (*code
)->expr2
,
10663 NULL
, NULL
, (*code
)->loc
);
10664 add_code_to_chain (&this_code
, &head
, &tail
);
10667 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10668 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10671 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10673 bool inout
= false;
10675 /* The intrinsic assignment does the right thing for pointers
10676 of all kinds and allocatable components. */
10677 if (!gfc_bt_struct (comp1
->ts
.type
)
10678 || comp1
->attr
.pointer
10679 || comp1
->attr
.allocatable
10680 || comp1
->attr
.proc_pointer_comp
10681 || comp1
->attr
.class_pointer
10682 || comp1
->attr
.proc_pointer
)
10685 /* Make an assigment for this component. */
10686 this_code
= build_assignment (EXEC_ASSIGN
,
10687 (*code
)->expr1
, (*code
)->expr2
,
10688 comp1
, comp2
, (*code
)->loc
);
10690 /* Convert the assignment if there is a defined assignment for
10691 this type. Otherwise, using the call from gfc_resolve_code,
10692 recurse into its components. */
10693 gfc_resolve_code (this_code
, ns
);
10695 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10697 gfc_formal_arglist
*dummy_args
;
10699 /* Check that there is a typebound defined assignment. If not,
10700 then this must be a module defined assignment. We cannot
10701 use the defined_assign_comp attribute here because it must
10702 be this derived type that has the defined assignment and not
10704 if (!(comp1
->ts
.u
.derived
->f2k_derived
10705 && comp1
->ts
.u
.derived
->f2k_derived
10706 ->tb_op
[INTRINSIC_ASSIGN
]))
10708 gfc_free_statements (this_code
);
10713 /* If the first argument of the subroutine has intent INOUT
10714 a temporary must be generated and used instead. */
10715 rsym
= this_code
->resolved_sym
;
10716 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10718 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10720 gfc_code
*temp_code
;
10723 /* Build the temporary required for the assignment and put
10724 it at the head of the generated code. */
10727 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10728 temp_code
= build_assignment (EXEC_ASSIGN
,
10729 t1
, (*code
)->expr1
,
10730 NULL
, NULL
, (*code
)->loc
);
10732 /* For allocatable LHS, check whether it is allocated. Note
10733 that allocatable components with defined assignment are
10734 not yet support. See PR 57696. */
10735 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10739 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10740 block
= gfc_get_code (EXEC_IF
);
10741 block
->block
= gfc_get_code (EXEC_IF
);
10742 block
->block
->expr1
10743 = gfc_build_intrinsic_call (ns
,
10744 GFC_ISYM_ALLOCATED
, "allocated",
10745 (*code
)->loc
, 1, e
);
10746 block
->block
->next
= temp_code
;
10749 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10752 /* Replace the first actual arg with the component of the
10754 gfc_free_expr (this_code
->ext
.actual
->expr
);
10755 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10756 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10758 /* If the LHS variable is allocatable and wasn't allocated and
10759 the temporary is allocatable, pointer assign the address of
10760 the freshly allocated LHS to the temporary. */
10761 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10762 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10767 cond
= gfc_get_expr ();
10768 cond
->ts
.type
= BT_LOGICAL
;
10769 cond
->ts
.kind
= gfc_default_logical_kind
;
10770 cond
->expr_type
= EXPR_OP
;
10771 cond
->where
= (*code
)->loc
;
10772 cond
->value
.op
.op
= INTRINSIC_NOT
;
10773 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10774 GFC_ISYM_ALLOCATED
, "allocated",
10775 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10776 block
= gfc_get_code (EXEC_IF
);
10777 block
->block
= gfc_get_code (EXEC_IF
);
10778 block
->block
->expr1
= cond
;
10779 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10780 t1
, (*code
)->expr1
,
10781 NULL
, NULL
, (*code
)->loc
);
10782 add_code_to_chain (&block
, &head
, &tail
);
10786 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10788 /* Don't add intrinsic assignments since they are already
10789 effected by the intrinsic assignment of the structure. */
10790 gfc_free_statements (this_code
);
10795 add_code_to_chain (&this_code
, &head
, &tail
);
10799 /* Transfer the value to the final result. */
10800 this_code
= build_assignment (EXEC_ASSIGN
,
10801 (*code
)->expr1
, t1
,
10802 comp1
, comp2
, (*code
)->loc
);
10803 add_code_to_chain (&this_code
, &head
, &tail
);
10807 /* Put the temporary assignments at the top of the generated code. */
10808 if (tmp_head
&& component_assignment_level
== 1)
10810 gfc_append_code (tmp_head
, head
);
10812 tmp_head
= tmp_tail
= NULL
;
10815 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10816 // not accidentally deallocated. Hence, nullify t1.
10817 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10818 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10824 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10825 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10826 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10827 block
= gfc_get_code (EXEC_IF
);
10828 block
->block
= gfc_get_code (EXEC_IF
);
10829 block
->block
->expr1
= cond
;
10830 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10831 t1
, gfc_get_null_expr (&(*code
)->loc
),
10832 NULL
, NULL
, (*code
)->loc
);
10833 gfc_append_code (tail
, block
);
10837 /* Now attach the remaining code chain to the input code. Step on
10838 to the end of the new code since resolution is complete. */
10839 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10840 tail
->next
= (*code
)->next
;
10841 /* Overwrite 'code' because this would place the intrinsic assignment
10842 before the temporary for the lhs is created. */
10843 gfc_free_expr ((*code
)->expr1
);
10844 gfc_free_expr ((*code
)->expr2
);
10850 component_assignment_level
--;
10854 /* F2008: Pointer function assignments are of the form:
10855 ptr_fcn (args) = expr
10856 This function breaks these assignments into two statements:
10857 temporary_pointer => ptr_fcn(args)
10858 temporary_pointer = expr */
10861 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10863 gfc_expr
*tmp_ptr_expr
;
10864 gfc_code
*this_code
;
10865 gfc_component
*comp
;
10868 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10871 /* Even if standard does not support this feature, continue to build
10872 the two statements to avoid upsetting frontend_passes.c. */
10873 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10874 "%L", &(*code
)->loc
);
10876 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10879 s
= comp
->ts
.interface
;
10881 s
= (*code
)->expr1
->symtree
->n
.sym
;
10883 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10885 gfc_error ("The function result on the lhs of the assignment at "
10886 "%L must have the pointer attribute.",
10887 &(*code
)->expr1
->where
);
10888 (*code
)->op
= EXEC_NOP
;
10892 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10894 /* get_temp_from_expression is set up for ordinary assignments. To that
10895 end, where array bounds are not known, arrays are made allocatable.
10896 Change the temporary to a pointer here. */
10897 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10898 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10899 tmp_ptr_expr
->where
= (*code
)->loc
;
10901 this_code
= build_assignment (EXEC_ASSIGN
,
10902 tmp_ptr_expr
, (*code
)->expr2
,
10903 NULL
, NULL
, (*code
)->loc
);
10904 this_code
->next
= (*code
)->next
;
10905 (*code
)->next
= this_code
;
10906 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10907 (*code
)->expr2
= (*code
)->expr1
;
10908 (*code
)->expr1
= tmp_ptr_expr
;
10914 /* Deferred character length assignments from an operator expression
10915 require a temporary because the character length of the lhs can
10916 change in the course of the assignment. */
10919 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10921 gfc_expr
*tmp_expr
;
10922 gfc_code
*this_code
;
10924 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10925 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10926 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10929 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10932 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10933 tmp_expr
->where
= (*code
)->loc
;
10935 /* A new charlen is required to ensure that the variable string
10936 length is different to that of the original lhs. */
10937 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10938 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10939 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10940 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10942 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10944 this_code
= build_assignment (EXEC_ASSIGN
,
10946 gfc_copy_expr (tmp_expr
),
10947 NULL
, NULL
, (*code
)->loc
);
10949 (*code
)->expr1
= tmp_expr
;
10951 this_code
->next
= (*code
)->next
;
10952 (*code
)->next
= this_code
;
10958 /* Given a block of code, recursively resolve everything pointed to by this
10962 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
10964 int omp_workshare_save
;
10965 int forall_save
, do_concurrent_save
;
10969 frame
.prev
= cs_base
;
10973 find_reachable_labels (code
);
10975 for (; code
; code
= code
->next
)
10977 frame
.current
= code
;
10978 forall_save
= forall_flag
;
10979 do_concurrent_save
= gfc_do_concurrent_flag
;
10981 if (code
->op
== EXEC_FORALL
)
10984 gfc_resolve_forall (code
, ns
, forall_save
);
10987 else if (code
->block
)
10989 omp_workshare_save
= -1;
10992 case EXEC_OACC_PARALLEL_LOOP
:
10993 case EXEC_OACC_PARALLEL
:
10994 case EXEC_OACC_KERNELS_LOOP
:
10995 case EXEC_OACC_KERNELS
:
10996 case EXEC_OACC_DATA
:
10997 case EXEC_OACC_HOST_DATA
:
10998 case EXEC_OACC_LOOP
:
10999 gfc_resolve_oacc_blocks (code
, ns
);
11001 case EXEC_OMP_PARALLEL_WORKSHARE
:
11002 omp_workshare_save
= omp_workshare_flag
;
11003 omp_workshare_flag
= 1;
11004 gfc_resolve_omp_parallel_blocks (code
, ns
);
11006 case EXEC_OMP_PARALLEL
:
11007 case EXEC_OMP_PARALLEL_DO
:
11008 case EXEC_OMP_PARALLEL_DO_SIMD
:
11009 case EXEC_OMP_PARALLEL_SECTIONS
:
11010 case EXEC_OMP_TARGET_PARALLEL
:
11011 case EXEC_OMP_TARGET_PARALLEL_DO
:
11012 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11013 case EXEC_OMP_TARGET_TEAMS
:
11014 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11015 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11016 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11017 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11018 case EXEC_OMP_TASK
:
11019 case EXEC_OMP_TASKLOOP
:
11020 case EXEC_OMP_TASKLOOP_SIMD
:
11021 case EXEC_OMP_TEAMS
:
11022 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11023 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11024 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11025 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11026 omp_workshare_save
= omp_workshare_flag
;
11027 omp_workshare_flag
= 0;
11028 gfc_resolve_omp_parallel_blocks (code
, ns
);
11030 case EXEC_OMP_DISTRIBUTE
:
11031 case EXEC_OMP_DISTRIBUTE_SIMD
:
11033 case EXEC_OMP_DO_SIMD
:
11034 case EXEC_OMP_SIMD
:
11035 case EXEC_OMP_TARGET_SIMD
:
11036 gfc_resolve_omp_do_blocks (code
, ns
);
11038 case EXEC_SELECT_TYPE
:
11039 /* Blocks are handled in resolve_select_type because we have
11040 to transform the SELECT TYPE into ASSOCIATE first. */
11042 case EXEC_DO_CONCURRENT
:
11043 gfc_do_concurrent_flag
= 1;
11044 gfc_resolve_blocks (code
->block
, ns
);
11045 gfc_do_concurrent_flag
= 2;
11047 case EXEC_OMP_WORKSHARE
:
11048 omp_workshare_save
= omp_workshare_flag
;
11049 omp_workshare_flag
= 1;
11052 gfc_resolve_blocks (code
->block
, ns
);
11056 if (omp_workshare_save
!= -1)
11057 omp_workshare_flag
= omp_workshare_save
;
11061 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11062 t
= gfc_resolve_expr (code
->expr1
);
11063 forall_flag
= forall_save
;
11064 gfc_do_concurrent_flag
= do_concurrent_save
;
11066 if (!gfc_resolve_expr (code
->expr2
))
11069 if (code
->op
== EXEC_ALLOCATE
11070 && !gfc_resolve_expr (code
->expr3
))
11076 case EXEC_END_BLOCK
:
11077 case EXEC_END_NESTED_BLOCK
:
11081 case EXEC_ERROR_STOP
:
11083 case EXEC_CONTINUE
:
11085 case EXEC_ASSIGN_CALL
:
11088 case EXEC_CRITICAL
:
11089 resolve_critical (code
);
11092 case EXEC_SYNC_ALL
:
11093 case EXEC_SYNC_IMAGES
:
11094 case EXEC_SYNC_MEMORY
:
11095 resolve_sync (code
);
11100 case EXEC_EVENT_POST
:
11101 case EXEC_EVENT_WAIT
:
11102 resolve_lock_unlock_event (code
);
11105 case EXEC_FAIL_IMAGE
:
11109 /* Keep track of which entry we are up to. */
11110 current_entry_id
= code
->ext
.entry
->id
;
11114 resolve_where (code
, NULL
);
11118 if (code
->expr1
!= NULL
)
11120 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11121 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11122 "INTEGER variable", &code
->expr1
->where
);
11123 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11124 gfc_error ("Variable %qs has not been assigned a target "
11125 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11126 &code
->expr1
->where
);
11129 resolve_branch (code
->label1
, code
);
11133 if (code
->expr1
!= NULL
11134 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11135 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11136 "INTEGER return specifier", &code
->expr1
->where
);
11139 case EXEC_INIT_ASSIGN
:
11140 case EXEC_END_PROCEDURE
:
11147 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11149 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11150 && code
->expr1
->value
.function
.isym
11151 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11152 remove_caf_get_intrinsic (code
->expr1
);
11154 /* If this is a pointer function in an lvalue variable context,
11155 the new code will have to be resolved afresh. This is also the
11156 case with an error, where the code is transformed into NOP to
11157 prevent ICEs downstream. */
11158 if (resolve_ptr_fcn_assign (&code
, ns
)
11159 || code
->op
== EXEC_NOP
)
11162 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11166 if (resolve_ordinary_assign (code
, ns
))
11168 if (code
->op
== EXEC_COMPCALL
)
11174 /* Check for dependencies in deferred character length array
11175 assignments and generate a temporary, if necessary. */
11176 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11179 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11180 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11181 && code
->expr1
->ts
.u
.derived
11182 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11183 generate_component_assignments (&code
, ns
);
11187 case EXEC_LABEL_ASSIGN
:
11188 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11189 gfc_error ("Label %d referenced at %L is never defined",
11190 code
->label1
->value
, &code
->label1
->where
);
11192 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11193 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11194 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11195 != gfc_default_integer_kind
11196 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11197 gfc_error ("ASSIGN statement at %L requires a scalar "
11198 "default INTEGER variable", &code
->expr1
->where
);
11201 case EXEC_POINTER_ASSIGN
:
11208 /* This is both a variable definition and pointer assignment
11209 context, so check both of them. For rank remapping, a final
11210 array ref may be present on the LHS and fool gfc_expr_attr
11211 used in gfc_check_vardef_context. Remove it. */
11212 e
= remove_last_array_ref (code
->expr1
);
11213 t
= gfc_check_vardef_context (e
, true, false, false,
11214 _("pointer assignment"));
11216 t
= gfc_check_vardef_context (e
, false, false, false,
11217 _("pointer assignment"));
11222 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11224 /* Assigning a class object always is a regular assign. */
11225 if (code
->expr2
->ts
.type
== BT_CLASS
11226 && code
->expr1
->ts
.type
== BT_CLASS
11227 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11228 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11229 && code
->expr2
->expr_type
== EXPR_VARIABLE
11230 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11232 code
->op
= EXEC_ASSIGN
;
11236 case EXEC_ARITHMETIC_IF
:
11238 gfc_expr
*e
= code
->expr1
;
11240 gfc_resolve_expr (e
);
11241 if (e
->expr_type
== EXPR_NULL
)
11242 gfc_error ("Invalid NULL at %L", &e
->where
);
11244 if (t
&& (e
->rank
> 0
11245 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11246 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11247 "REAL or INTEGER expression", &e
->where
);
11249 resolve_branch (code
->label1
, code
);
11250 resolve_branch (code
->label2
, code
);
11251 resolve_branch (code
->label3
, code
);
11256 if (t
&& code
->expr1
!= NULL
11257 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11258 || code
->expr1
->rank
!= 0))
11259 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11260 &code
->expr1
->where
);
11265 resolve_call (code
);
11268 case EXEC_COMPCALL
:
11270 resolve_typebound_subroutine (code
);
11273 case EXEC_CALL_PPC
:
11274 resolve_ppc_call (code
);
11278 /* Select is complicated. Also, a SELECT construct could be
11279 a transformed computed GOTO. */
11280 resolve_select (code
, false);
11283 case EXEC_SELECT_TYPE
:
11284 resolve_select_type (code
, ns
);
11288 resolve_block_construct (code
);
11292 if (code
->ext
.iterator
!= NULL
)
11294 gfc_iterator
*iter
= code
->ext
.iterator
;
11295 if (gfc_resolve_iterator (iter
, true, false))
11296 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11301 case EXEC_DO_WHILE
:
11302 if (code
->expr1
== NULL
)
11303 gfc_internal_error ("gfc_resolve_code(): No expression on "
11306 && (code
->expr1
->rank
!= 0
11307 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11308 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11309 "a scalar LOGICAL expression", &code
->expr1
->where
);
11312 case EXEC_ALLOCATE
:
11314 resolve_allocate_deallocate (code
, "ALLOCATE");
11318 case EXEC_DEALLOCATE
:
11320 resolve_allocate_deallocate (code
, "DEALLOCATE");
11325 if (!gfc_resolve_open (code
->ext
.open
))
11328 resolve_branch (code
->ext
.open
->err
, code
);
11332 if (!gfc_resolve_close (code
->ext
.close
))
11335 resolve_branch (code
->ext
.close
->err
, code
);
11338 case EXEC_BACKSPACE
:
11342 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11345 resolve_branch (code
->ext
.filepos
->err
, code
);
11349 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11352 resolve_branch (code
->ext
.inquire
->err
, code
);
11355 case EXEC_IOLENGTH
:
11356 gcc_assert (code
->ext
.inquire
!= NULL
);
11357 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11360 resolve_branch (code
->ext
.inquire
->err
, code
);
11364 if (!gfc_resolve_wait (code
->ext
.wait
))
11367 resolve_branch (code
->ext
.wait
->err
, code
);
11368 resolve_branch (code
->ext
.wait
->end
, code
);
11369 resolve_branch (code
->ext
.wait
->eor
, code
);
11374 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11377 resolve_branch (code
->ext
.dt
->err
, code
);
11378 resolve_branch (code
->ext
.dt
->end
, code
);
11379 resolve_branch (code
->ext
.dt
->eor
, code
);
11382 case EXEC_TRANSFER
:
11383 resolve_transfer (code
);
11386 case EXEC_DO_CONCURRENT
:
11388 resolve_forall_iterators (code
->ext
.forall_iterator
);
11390 if (code
->expr1
!= NULL
11391 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11392 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11393 "expression", &code
->expr1
->where
);
11396 case EXEC_OACC_PARALLEL_LOOP
:
11397 case EXEC_OACC_PARALLEL
:
11398 case EXEC_OACC_KERNELS_LOOP
:
11399 case EXEC_OACC_KERNELS
:
11400 case EXEC_OACC_DATA
:
11401 case EXEC_OACC_HOST_DATA
:
11402 case EXEC_OACC_LOOP
:
11403 case EXEC_OACC_UPDATE
:
11404 case EXEC_OACC_WAIT
:
11405 case EXEC_OACC_CACHE
:
11406 case EXEC_OACC_ENTER_DATA
:
11407 case EXEC_OACC_EXIT_DATA
:
11408 case EXEC_OACC_ATOMIC
:
11409 case EXEC_OACC_DECLARE
:
11410 gfc_resolve_oacc_directive (code
, ns
);
11413 case EXEC_OMP_ATOMIC
:
11414 case EXEC_OMP_BARRIER
:
11415 case EXEC_OMP_CANCEL
:
11416 case EXEC_OMP_CANCELLATION_POINT
:
11417 case EXEC_OMP_CRITICAL
:
11418 case EXEC_OMP_FLUSH
:
11419 case EXEC_OMP_DISTRIBUTE
:
11420 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11421 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11422 case EXEC_OMP_DISTRIBUTE_SIMD
:
11424 case EXEC_OMP_DO_SIMD
:
11425 case EXEC_OMP_MASTER
:
11426 case EXEC_OMP_ORDERED
:
11427 case EXEC_OMP_SECTIONS
:
11428 case EXEC_OMP_SIMD
:
11429 case EXEC_OMP_SINGLE
:
11430 case EXEC_OMP_TARGET
:
11431 case EXEC_OMP_TARGET_DATA
:
11432 case EXEC_OMP_TARGET_ENTER_DATA
:
11433 case EXEC_OMP_TARGET_EXIT_DATA
:
11434 case EXEC_OMP_TARGET_PARALLEL
:
11435 case EXEC_OMP_TARGET_PARALLEL_DO
:
11436 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11437 case EXEC_OMP_TARGET_SIMD
:
11438 case EXEC_OMP_TARGET_TEAMS
:
11439 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11440 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11441 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11442 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11443 case EXEC_OMP_TARGET_UPDATE
:
11444 case EXEC_OMP_TASK
:
11445 case EXEC_OMP_TASKGROUP
:
11446 case EXEC_OMP_TASKLOOP
:
11447 case EXEC_OMP_TASKLOOP_SIMD
:
11448 case EXEC_OMP_TASKWAIT
:
11449 case EXEC_OMP_TASKYIELD
:
11450 case EXEC_OMP_TEAMS
:
11451 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11452 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11453 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11454 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11455 case EXEC_OMP_WORKSHARE
:
11456 gfc_resolve_omp_directive (code
, ns
);
11459 case EXEC_OMP_PARALLEL
:
11460 case EXEC_OMP_PARALLEL_DO
:
11461 case EXEC_OMP_PARALLEL_DO_SIMD
:
11462 case EXEC_OMP_PARALLEL_SECTIONS
:
11463 case EXEC_OMP_PARALLEL_WORKSHARE
:
11464 omp_workshare_save
= omp_workshare_flag
;
11465 omp_workshare_flag
= 0;
11466 gfc_resolve_omp_directive (code
, ns
);
11467 omp_workshare_flag
= omp_workshare_save
;
11471 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11475 cs_base
= frame
.prev
;
11479 /* Resolve initial values and make sure they are compatible with
11483 resolve_values (gfc_symbol
*sym
)
11487 if (sym
->value
== NULL
)
11490 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11491 t
= resolve_structure_cons (sym
->value
, 1);
11493 t
= gfc_resolve_expr (sym
->value
);
11498 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11502 /* Verify any BIND(C) derived types in the namespace so we can report errors
11503 for them once, rather than for each variable declared of that type. */
11506 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11508 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11509 && derived_sym
->attr
.is_bind_c
== 1)
11510 verify_bind_c_derived_type (derived_sym
);
11516 /* Check the interfaces of DTIO procedures associated with derived
11517 type 'sym'. These procedures can either have typebound bindings or
11518 can appear in DTIO generic interfaces. */
11521 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11523 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11526 gfc_check_dtio_interfaces (sym
);
11531 /* Verify that any binding labels used in a given namespace do not collide
11532 with the names or binding labels of any global symbols. Multiple INTERFACE
11533 for the same procedure are permitted. */
11536 gfc_verify_binding_labels (gfc_symbol
*sym
)
11539 const char *module
;
11541 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11542 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11545 gsym
= gfc_find_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11548 module
= sym
->module
;
11549 else if (sym
->ns
&& sym
->ns
->proc_name
11550 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11551 module
= sym
->ns
->proc_name
->name
;
11552 else if (sym
->ns
&& sym
->ns
->parent
11553 && sym
->ns
&& sym
->ns
->parent
->proc_name
11554 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11555 module
= sym
->ns
->parent
->proc_name
->name
;
11561 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11564 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11565 gsym
->where
= sym
->declared_at
;
11566 gsym
->sym_name
= sym
->name
;
11567 gsym
->binding_label
= sym
->binding_label
;
11568 gsym
->ns
= sym
->ns
;
11569 gsym
->mod_name
= module
;
11570 if (sym
->attr
.function
)
11571 gsym
->type
= GSYM_FUNCTION
;
11572 else if (sym
->attr
.subroutine
)
11573 gsym
->type
= GSYM_SUBROUTINE
;
11574 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11575 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11579 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11581 gfc_error ("Variable %s with binding label %s at %L uses the same global "
11582 "identifier as entity at %L", sym
->name
,
11583 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11584 /* Clear the binding label to prevent checking multiple times. */
11585 sym
->binding_label
= NULL
;
11588 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11589 && (strcmp (module
, gsym
->mod_name
) != 0
11590 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11592 /* This can only happen if the variable is defined in a module - if it
11593 isn't the same module, reject it. */
11594 gfc_error ("Variable %s from module %s with binding label %s at %L uses "
11595 "the same global identifier as entity at %L from module %s",
11596 sym
->name
, module
, sym
->binding_label
,
11597 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11598 sym
->binding_label
= NULL
;
11600 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11601 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11602 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11603 && sym
!= gsym
->ns
->proc_name
11604 && (module
!= gsym
->mod_name
11605 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11606 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11608 /* Print an error if the procedure is defined multiple times; we have to
11609 exclude references to the same procedure via module association or
11610 multiple checks for the same procedure. */
11611 gfc_error ("Procedure %s with binding label %s at %L uses the same "
11612 "global identifier as entity at %L", sym
->name
,
11613 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11614 sym
->binding_label
= NULL
;
11619 /* Resolve an index expression. */
11622 resolve_index_expr (gfc_expr
*e
)
11624 if (!gfc_resolve_expr (e
))
11627 if (!gfc_simplify_expr (e
, 0))
11630 if (!gfc_specification_expr (e
))
11637 /* Resolve a charlen structure. */
11640 resolve_charlen (gfc_charlen
*cl
)
11643 bool saved_specification_expr
;
11649 saved_specification_expr
= specification_expr
;
11650 specification_expr
= true;
11652 if (cl
->length_from_typespec
)
11654 if (!gfc_resolve_expr (cl
->length
))
11656 specification_expr
= saved_specification_expr
;
11660 if (!gfc_simplify_expr (cl
->length
, 0))
11662 specification_expr
= saved_specification_expr
;
11669 if (!resolve_index_expr (cl
->length
))
11671 specification_expr
= saved_specification_expr
;
11676 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11677 a negative value, the length of character entities declared is zero. */
11678 if (cl
->length
&& !gfc_extract_int (cl
->length
, &i
) && i
< 0)
11679 gfc_replace_expr (cl
->length
,
11680 gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 0));
11682 /* Check that the character length is not too large. */
11683 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11684 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11685 && cl
->length
->ts
.type
== BT_INTEGER
11686 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11688 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11689 specification_expr
= saved_specification_expr
;
11693 specification_expr
= saved_specification_expr
;
11698 /* Test for non-constant shape arrays. */
11701 is_non_constant_shape_array (gfc_symbol
*sym
)
11707 not_constant
= false;
11708 if (sym
->as
!= NULL
)
11710 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11711 has not been simplified; parameter array references. Do the
11712 simplification now. */
11713 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11715 e
= sym
->as
->lower
[i
];
11716 if (e
&& (!resolve_index_expr(e
)
11717 || !gfc_is_constant_expr (e
)))
11718 not_constant
= true;
11719 e
= sym
->as
->upper
[i
];
11720 if (e
&& (!resolve_index_expr(e
)
11721 || !gfc_is_constant_expr (e
)))
11722 not_constant
= true;
11725 return not_constant
;
11728 /* Given a symbol and an initialization expression, add code to initialize
11729 the symbol to the function entry. */
11731 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11735 gfc_namespace
*ns
= sym
->ns
;
11737 /* Search for the function namespace if this is a contained
11738 function without an explicit result. */
11739 if (sym
->attr
.function
&& sym
== sym
->result
11740 && sym
->name
!= sym
->ns
->proc_name
->name
)
11742 ns
= ns
->contained
;
11743 for (;ns
; ns
= ns
->sibling
)
11744 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11750 gfc_free_expr (init
);
11754 /* Build an l-value expression for the result. */
11755 lval
= gfc_lval_expr_from_sym (sym
);
11757 /* Add the code at scope entry. */
11758 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11759 init_st
->next
= ns
->code
;
11760 ns
->code
= init_st
;
11762 /* Assign the default initializer to the l-value. */
11763 init_st
->loc
= sym
->declared_at
;
11764 init_st
->expr1
= lval
;
11765 init_st
->expr2
= init
;
11769 /* Whether or not we can generate a default initializer for a symbol. */
11772 can_generate_init (gfc_symbol
*sym
)
11774 symbol_attribute
*a
;
11779 /* These symbols should never have a default initialization. */
11784 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11785 && (CLASS_DATA (sym
)->attr
.class_pointer
11786 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11787 || a
->in_equivalence
11794 || (!a
->referenced
&& !a
->result
)
11795 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11796 || (a
->function
&& sym
!= sym
->result
)
11801 /* Assign the default initializer to a derived type variable or result. */
11804 apply_default_init (gfc_symbol
*sym
)
11806 gfc_expr
*init
= NULL
;
11808 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11811 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11812 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11814 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11817 build_init_assign (sym
, init
);
11818 sym
->attr
.referenced
= 1;
11822 /* Build an initializer for a local. Returns null if the symbol should not have
11823 a default initialization. */
11826 build_default_init_expr (gfc_symbol
*sym
)
11828 /* These symbols should never have a default initialization. */
11829 if (sym
->attr
.allocatable
11830 || sym
->attr
.external
11832 || sym
->attr
.pointer
11833 || sym
->attr
.in_equivalence
11834 || sym
->attr
.in_common
11837 || sym
->attr
.cray_pointee
11838 || sym
->attr
.cray_pointer
11842 /* Get the appropriate init expression. */
11843 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11846 /* Add an initialization expression to a local variable. */
11848 apply_default_init_local (gfc_symbol
*sym
)
11850 gfc_expr
*init
= NULL
;
11852 /* The symbol should be a variable or a function return value. */
11853 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11854 || (sym
->attr
.function
&& sym
->result
!= sym
))
11857 /* Try to build the initializer expression. If we can't initialize
11858 this symbol, then init will be NULL. */
11859 init
= build_default_init_expr (sym
);
11863 /* For saved variables, we don't want to add an initializer at function
11864 entry, so we just add a static initializer. Note that automatic variables
11865 are stack allocated even with -fno-automatic; we have also to exclude
11866 result variable, which are also nonstatic. */
11867 if (!sym
->attr
.automatic
11868 && (sym
->attr
.save
|| sym
->ns
->save_all
11869 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11870 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11871 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11873 /* Don't clobber an existing initializer! */
11874 gcc_assert (sym
->value
== NULL
);
11879 build_init_assign (sym
, init
);
11883 /* Resolution of common features of flavors variable and procedure. */
11886 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11888 gfc_array_spec
*as
;
11890 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11891 as
= CLASS_DATA (sym
)->as
;
11895 /* Constraints on deferred shape variable. */
11896 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11898 bool pointer
, allocatable
, dimension
;
11900 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11902 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11903 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11904 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11908 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11909 allocatable
= sym
->attr
.allocatable
;
11910 dimension
= sym
->attr
.dimension
;
11915 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11917 gfc_error ("Allocatable array %qs at %L must have a deferred "
11918 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
11921 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
11922 "%qs at %L may not be ALLOCATABLE",
11923 sym
->name
, &sym
->declared_at
))
11927 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11929 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
11930 "assumed rank", sym
->name
, &sym
->declared_at
);
11936 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
11937 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
11939 gfc_error ("Array %qs at %L cannot have a deferred shape",
11940 sym
->name
, &sym
->declared_at
);
11945 /* Constraints on polymorphic variables. */
11946 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
11949 if (sym
->attr
.class_ok
11950 && !sym
->attr
.select_type_temporary
11951 && !UNLIMITED_POLY (sym
)
11952 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
11954 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
11955 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
11956 &sym
->declared_at
);
11961 /* Assume that use associated symbols were checked in the module ns.
11962 Class-variables that are associate-names are also something special
11963 and excepted from the test. */
11964 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
11966 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
11967 "or pointer", sym
->name
, &sym
->declared_at
);
11976 /* Additional checks for symbols with flavor variable and derived
11977 type. To be called from resolve_fl_variable. */
11980 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
11982 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
11984 /* Check to see if a derived type is blocked from being host
11985 associated by the presence of another class I symbol in the same
11986 namespace. 14.6.1.3 of the standard and the discussion on
11987 comp.lang.fortran. */
11988 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
11989 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
11992 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
11993 if (s
&& s
->attr
.generic
)
11994 s
= gfc_find_dt_in_generic (s
);
11995 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
11997 gfc_error ("The type %qs cannot be host associated at %L "
11998 "because it is blocked by an incompatible object "
11999 "of the same name declared at %L",
12000 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12006 /* 4th constraint in section 11.3: "If an object of a type for which
12007 component-initialization is specified (R429) appears in the
12008 specification-part of a module and does not have the ALLOCATABLE
12009 or POINTER attribute, the object shall have the SAVE attribute."
12011 The check for initializers is performed with
12012 gfc_has_default_initializer because gfc_default_initializer generates
12013 a hidden default for allocatable components. */
12014 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12015 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12016 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12017 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12018 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12019 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12020 "%qs at %L, needed due to the default "
12021 "initialization", sym
->name
, &sym
->declared_at
))
12024 /* Assign default initializer. */
12025 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12026 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12027 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12033 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12034 except in the declaration of an entity or component that has the POINTER
12035 or ALLOCATABLE attribute. */
12038 deferred_requirements (gfc_symbol
*sym
)
12040 if (sym
->ts
.deferred
12041 && !(sym
->attr
.pointer
12042 || sym
->attr
.allocatable
12043 || sym
->attr
.associate_var
12044 || sym
->attr
.omp_udr_artificial_var
))
12046 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12047 "requires either the POINTER or ALLOCATABLE attribute",
12048 sym
->name
, &sym
->declared_at
);
12055 /* Resolve symbols with flavor variable. */
12058 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12060 int no_init_flag
, automatic_flag
;
12062 const char *auto_save_msg
;
12063 bool saved_specification_expr
;
12065 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12068 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12071 /* Set this flag to check that variables are parameters of all entries.
12072 This check is effected by the call to gfc_resolve_expr through
12073 is_non_constant_shape_array. */
12074 saved_specification_expr
= specification_expr
;
12075 specification_expr
= true;
12077 if (sym
->ns
->proc_name
12078 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12079 || sym
->ns
->proc_name
->attr
.is_main_program
)
12080 && !sym
->attr
.use_assoc
12081 && !sym
->attr
.allocatable
12082 && !sym
->attr
.pointer
12083 && is_non_constant_shape_array (sym
))
12085 /* F08:C541. The shape of an array defined in a main program or module
12086 * needs to be constant. */
12087 gfc_error ("The module or main program array %qs at %L must "
12088 "have constant shape", sym
->name
, &sym
->declared_at
);
12089 specification_expr
= saved_specification_expr
;
12093 /* Constraints on deferred type parameter. */
12094 if (!deferred_requirements (sym
))
12097 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12099 /* Make sure that character string variables with assumed length are
12100 dummy arguments. */
12101 e
= sym
->ts
.u
.cl
->length
;
12102 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12103 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12104 && !sym
->attr
.omp_udr_artificial_var
)
12106 gfc_error ("Entity with assumed character length at %L must be a "
12107 "dummy argument or a PARAMETER", &sym
->declared_at
);
12108 specification_expr
= saved_specification_expr
;
12112 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12114 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12115 specification_expr
= saved_specification_expr
;
12119 if (!gfc_is_constant_expr (e
)
12120 && !(e
->expr_type
== EXPR_VARIABLE
12121 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12123 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12124 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12125 || sym
->ns
->proc_name
->attr
.is_main_program
))
12127 gfc_error ("%qs at %L must have constant character length "
12128 "in this context", sym
->name
, &sym
->declared_at
);
12129 specification_expr
= saved_specification_expr
;
12132 if (sym
->attr
.in_common
)
12134 gfc_error ("COMMON variable %qs at %L must have constant "
12135 "character length", sym
->name
, &sym
->declared_at
);
12136 specification_expr
= saved_specification_expr
;
12142 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12143 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12145 /* Determine if the symbol may not have an initializer. */
12146 no_init_flag
= automatic_flag
= 0;
12147 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12148 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12150 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12151 && is_non_constant_shape_array (sym
))
12153 no_init_flag
= automatic_flag
= 1;
12155 /* Also, they must not have the SAVE attribute.
12156 SAVE_IMPLICIT is checked below. */
12157 if (sym
->as
&& sym
->attr
.codimension
)
12159 int corank
= sym
->as
->corank
;
12160 sym
->as
->corank
= 0;
12161 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12162 sym
->as
->corank
= corank
;
12164 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12166 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12167 specification_expr
= saved_specification_expr
;
12172 /* Ensure that any initializer is simplified. */
12174 gfc_simplify_expr (sym
->value
, 1);
12176 /* Reject illegal initializers. */
12177 if (!sym
->mark
&& sym
->value
)
12179 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12180 && CLASS_DATA (sym
)->attr
.allocatable
))
12181 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12182 sym
->name
, &sym
->declared_at
);
12183 else if (sym
->attr
.external
)
12184 gfc_error ("External %qs at %L cannot have an initializer",
12185 sym
->name
, &sym
->declared_at
);
12186 else if (sym
->attr
.dummy
12187 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12188 gfc_error ("Dummy %qs at %L cannot have an initializer",
12189 sym
->name
, &sym
->declared_at
);
12190 else if (sym
->attr
.intrinsic
)
12191 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12192 sym
->name
, &sym
->declared_at
);
12193 else if (sym
->attr
.result
)
12194 gfc_error ("Function result %qs at %L cannot have an initializer",
12195 sym
->name
, &sym
->declared_at
);
12196 else if (automatic_flag
)
12197 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12198 sym
->name
, &sym
->declared_at
);
12200 goto no_init_error
;
12201 specification_expr
= saved_specification_expr
;
12206 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12208 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12209 specification_expr
= saved_specification_expr
;
12213 specification_expr
= saved_specification_expr
;
12218 /* Compare the dummy characteristics of a module procedure interface
12219 declaration with the corresponding declaration in a submodule. */
12220 static gfc_formal_arglist
*new_formal
;
12221 static char errmsg
[200];
12224 compare_fsyms (gfc_symbol
*sym
)
12228 if (sym
== NULL
|| new_formal
== NULL
)
12231 fsym
= new_formal
->sym
;
12236 if (strcmp (sym
->name
, fsym
->name
) == 0)
12238 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12239 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12244 /* Resolve a procedure. */
12247 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12249 gfc_formal_arglist
*arg
;
12251 if (sym
->attr
.function
12252 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12255 if (sym
->ts
.type
== BT_CHARACTER
)
12257 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12259 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12260 && !resolve_charlen (cl
))
12263 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12264 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12266 gfc_error ("Character-valued statement function %qs at %L must "
12267 "have constant length", sym
->name
, &sym
->declared_at
);
12272 /* Ensure that derived type for are not of a private type. Internal
12273 module procedures are excluded by 2.2.3.3 - i.e., they are not
12274 externally accessible and can access all the objects accessible in
12276 if (!(sym
->ns
->parent
12277 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12278 && gfc_check_symbol_access (sym
))
12280 gfc_interface
*iface
;
12282 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12285 && arg
->sym
->ts
.type
== BT_DERIVED
12286 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12287 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12288 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12289 "and cannot be a dummy argument"
12290 " of %qs, which is PUBLIC at %L",
12291 arg
->sym
->name
, sym
->name
,
12292 &sym
->declared_at
))
12294 /* Stop this message from recurring. */
12295 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12300 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12301 PRIVATE to the containing module. */
12302 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12304 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12307 && arg
->sym
->ts
.type
== BT_DERIVED
12308 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12309 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12310 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12311 "PUBLIC interface %qs at %L "
12312 "takes dummy arguments of %qs which "
12313 "is PRIVATE", iface
->sym
->name
,
12314 sym
->name
, &iface
->sym
->declared_at
,
12315 gfc_typename(&arg
->sym
->ts
)))
12317 /* Stop this message from recurring. */
12318 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12325 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12326 && !sym
->attr
.proc_pointer
)
12328 gfc_error ("Function %qs at %L cannot have an initializer",
12329 sym
->name
, &sym
->declared_at
);
12333 /* An external symbol may not have an initializer because it is taken to be
12334 a procedure. Exception: Procedure Pointers. */
12335 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12337 gfc_error ("External object %qs at %L may not have an initializer",
12338 sym
->name
, &sym
->declared_at
);
12342 /* An elemental function is required to return a scalar 12.7.1 */
12343 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12345 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12346 "result", sym
->name
, &sym
->declared_at
);
12347 /* Reset so that the error only occurs once. */
12348 sym
->attr
.elemental
= 0;
12352 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12353 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12355 gfc_error ("Statement function %qs at %L may not have pointer or "
12356 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12360 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12361 char-len-param shall not be array-valued, pointer-valued, recursive
12362 or pure. ....snip... A character value of * may only be used in the
12363 following ways: (i) Dummy arg of procedure - dummy associates with
12364 actual length; (ii) To declare a named constant; or (iii) External
12365 function - but length must be declared in calling scoping unit. */
12366 if (sym
->attr
.function
12367 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12368 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12370 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12371 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12373 if (sym
->as
&& sym
->as
->rank
)
12374 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12375 "array-valued", sym
->name
, &sym
->declared_at
);
12377 if (sym
->attr
.pointer
)
12378 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12379 "pointer-valued", sym
->name
, &sym
->declared_at
);
12381 if (sym
->attr
.pure
)
12382 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12383 "pure", sym
->name
, &sym
->declared_at
);
12385 if (sym
->attr
.recursive
)
12386 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12387 "recursive", sym
->name
, &sym
->declared_at
);
12392 /* Appendix B.2 of the standard. Contained functions give an
12393 error anyway. Deferred character length is an F2003 feature.
12394 Don't warn on intrinsic conversion functions, which start
12395 with two underscores. */
12396 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12397 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12398 gfc_notify_std (GFC_STD_F95_OBS
,
12399 "CHARACTER(*) function %qs at %L",
12400 sym
->name
, &sym
->declared_at
);
12403 /* F2008, C1218. */
12404 if (sym
->attr
.elemental
)
12406 if (sym
->attr
.proc_pointer
)
12408 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12409 sym
->name
, &sym
->declared_at
);
12412 if (sym
->attr
.dummy
)
12414 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12415 sym
->name
, &sym
->declared_at
);
12420 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12422 gfc_formal_arglist
*curr_arg
;
12423 int has_non_interop_arg
= 0;
12425 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12426 sym
->common_block
))
12428 /* Clear these to prevent looking at them again if there was an
12430 sym
->attr
.is_bind_c
= 0;
12431 sym
->attr
.is_c_interop
= 0;
12432 sym
->ts
.is_c_interop
= 0;
12436 /* So far, no errors have been found. */
12437 sym
->attr
.is_c_interop
= 1;
12438 sym
->ts
.is_c_interop
= 1;
12441 curr_arg
= gfc_sym_get_dummy_args (sym
);
12442 while (curr_arg
!= NULL
)
12444 /* Skip implicitly typed dummy args here. */
12445 if (curr_arg
->sym
->attr
.implicit_type
== 0)
12446 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12447 /* If something is found to fail, record the fact so we
12448 can mark the symbol for the procedure as not being
12449 BIND(C) to try and prevent multiple errors being
12451 has_non_interop_arg
= 1;
12453 curr_arg
= curr_arg
->next
;
12456 /* See if any of the arguments were not interoperable and if so, clear
12457 the procedure symbol to prevent duplicate error messages. */
12458 if (has_non_interop_arg
!= 0)
12460 sym
->attr
.is_c_interop
= 0;
12461 sym
->ts
.is_c_interop
= 0;
12462 sym
->attr
.is_bind_c
= 0;
12466 if (!sym
->attr
.proc_pointer
)
12468 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12470 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12471 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12474 if (sym
->attr
.intent
)
12476 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12477 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12480 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12482 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12483 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12486 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12487 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12488 || sym
->attr
.contained
))
12490 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12491 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12494 if (strcmp ("ppr@", sym
->name
) == 0)
12496 gfc_error ("Procedure pointer result %qs at %L "
12497 "is missing the pointer attribute",
12498 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12503 /* Assume that a procedure whose body is not known has references
12504 to external arrays. */
12505 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12506 sym
->attr
.array_outer_dependency
= 1;
12508 /* Compare the characteristics of a module procedure with the
12509 interface declaration. Ideally this would be done with
12510 gfc_compare_interfaces but, at present, the formal interface
12511 cannot be copied to the ts.interface. */
12512 if (sym
->attr
.module_procedure
12513 && sym
->attr
.if_source
== IFSRC_DECL
)
12516 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12518 char *submodule_name
;
12519 strcpy (name
, sym
->ns
->proc_name
->name
);
12520 module_name
= strtok (name
, ".");
12521 submodule_name
= strtok (NULL
, ".");
12523 iface
= sym
->tlink
;
12526 /* Make sure that the result uses the correct charlen for deferred
12528 if (iface
&& sym
->result
12529 && iface
->ts
.type
== BT_CHARACTER
12530 && iface
->ts
.deferred
)
12531 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12536 /* Check the procedure characteristics. */
12537 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12539 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12540 "PROCEDURE at %L and its interface in %s",
12541 &sym
->declared_at
, module_name
);
12545 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12547 gfc_error ("Mismatch in PURE attribute between MODULE "
12548 "PROCEDURE at %L and its interface in %s",
12549 &sym
->declared_at
, module_name
);
12553 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12555 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12556 "PROCEDURE at %L and its interface in %s",
12557 &sym
->declared_at
, module_name
);
12561 /* Check the result characteristics. */
12562 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12564 gfc_error ("%s between the MODULE PROCEDURE declaration "
12565 "in MODULE %qs and the declaration at %L in "
12567 errmsg
, module_name
, &sym
->declared_at
,
12568 submodule_name
? submodule_name
: module_name
);
12573 /* Check the characteristics of the formal arguments. */
12574 if (sym
->formal
&& sym
->formal_ns
)
12576 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12579 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12587 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12588 been defined and we now know their defined arguments, check that they fulfill
12589 the requirements of the standard for procedures used as finalizers. */
12592 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12594 gfc_finalizer
* list
;
12595 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12596 bool result
= true;
12597 bool seen_scalar
= false;
12600 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12603 gfc_resolve_finalizers (parent
, finalizable
);
12605 /* Ensure that derived-type components have a their finalizers resolved. */
12606 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12607 for (c
= derived
->components
; c
; c
= c
->next
)
12608 if (c
->ts
.type
== BT_DERIVED
12609 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12611 bool has_final2
= false;
12612 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12613 return false; /* Error. */
12614 has_final
= has_final
|| has_final2
;
12616 /* Return early if not finalizable. */
12620 *finalizable
= false;
12624 /* Walk over the list of finalizer-procedures, check them, and if any one
12625 does not fit in with the standard's definition, print an error and remove
12626 it from the list. */
12627 prev_link
= &derived
->f2k_derived
->finalizers
;
12628 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12630 gfc_formal_arglist
*dummy_args
;
12635 /* Skip this finalizer if we already resolved it. */
12636 if (list
->proc_tree
)
12638 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12639 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12640 seen_scalar
= true;
12641 prev_link
= &(list
->next
);
12645 /* Check this exists and is a SUBROUTINE. */
12646 if (!list
->proc_sym
->attr
.subroutine
)
12648 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12649 list
->proc_sym
->name
, &list
->where
);
12653 /* We should have exactly one argument. */
12654 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12655 if (!dummy_args
|| dummy_args
->next
)
12657 gfc_error ("FINAL procedure at %L must have exactly one argument",
12661 arg
= dummy_args
->sym
;
12663 /* This argument must be of our type. */
12664 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12666 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12667 &arg
->declared_at
, derived
->name
);
12671 /* It must neither be a pointer nor allocatable nor optional. */
12672 if (arg
->attr
.pointer
)
12674 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12675 &arg
->declared_at
);
12678 if (arg
->attr
.allocatable
)
12680 gfc_error ("Argument of FINAL procedure at %L must not be"
12681 " ALLOCATABLE", &arg
->declared_at
);
12684 if (arg
->attr
.optional
)
12686 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12687 &arg
->declared_at
);
12691 /* It must not be INTENT(OUT). */
12692 if (arg
->attr
.intent
== INTENT_OUT
)
12694 gfc_error ("Argument of FINAL procedure at %L must not be"
12695 " INTENT(OUT)", &arg
->declared_at
);
12699 /* Warn if the procedure is non-scalar and not assumed shape. */
12700 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12701 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12702 gfc_warning (OPT_Wsurprising
,
12703 "Non-scalar FINAL procedure at %L should have assumed"
12704 " shape argument", &arg
->declared_at
);
12706 /* Check that it does not match in kind and rank with a FINAL procedure
12707 defined earlier. To really loop over the *earlier* declarations,
12708 we need to walk the tail of the list as new ones were pushed at the
12710 /* TODO: Handle kind parameters once they are implemented. */
12711 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12712 for (i
= list
->next
; i
; i
= i
->next
)
12714 gfc_formal_arglist
*dummy_args
;
12716 /* Argument list might be empty; that is an error signalled earlier,
12717 but we nevertheless continued resolving. */
12718 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12721 gfc_symbol
* i_arg
= dummy_args
->sym
;
12722 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12723 if (i_rank
== my_rank
)
12725 gfc_error ("FINAL procedure %qs declared at %L has the same"
12726 " rank (%d) as %qs",
12727 list
->proc_sym
->name
, &list
->where
, my_rank
,
12728 i
->proc_sym
->name
);
12734 /* Is this the/a scalar finalizer procedure? */
12736 seen_scalar
= true;
12738 /* Find the symtree for this procedure. */
12739 gcc_assert (!list
->proc_tree
);
12740 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12742 prev_link
= &list
->next
;
12745 /* Remove wrong nodes immediately from the list so we don't risk any
12746 troubles in the future when they might fail later expectations. */
12749 *prev_link
= list
->next
;
12750 gfc_free_finalizer (i
);
12754 if (result
== false)
12757 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12758 were nodes in the list, must have been for arrays. It is surely a good
12759 idea to have a scalar version there if there's something to finalize. */
12760 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12761 gfc_warning (OPT_Wsurprising
,
12762 "Only array FINAL procedures declared for derived type %qs"
12763 " defined at %L, suggest also scalar one",
12764 derived
->name
, &derived
->declared_at
);
12766 vtab
= gfc_find_derived_vtab (derived
);
12767 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12768 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12771 *finalizable
= true;
12777 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12780 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12781 const char* generic_name
, locus where
)
12783 gfc_symbol
*sym1
, *sym2
;
12784 const char *pass1
, *pass2
;
12785 gfc_formal_arglist
*dummy_args
;
12787 gcc_assert (t1
->specific
&& t2
->specific
);
12788 gcc_assert (!t1
->specific
->is_generic
);
12789 gcc_assert (!t2
->specific
->is_generic
);
12790 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12792 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12793 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12798 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12799 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12800 || sym1
->attr
.function
!= sym2
->attr
.function
)
12802 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12803 " GENERIC %qs at %L",
12804 sym1
->name
, sym2
->name
, generic_name
, &where
);
12808 /* Determine PASS arguments. */
12809 if (t1
->specific
->nopass
)
12811 else if (t1
->specific
->pass_arg
)
12812 pass1
= t1
->specific
->pass_arg
;
12815 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12817 pass1
= dummy_args
->sym
->name
;
12821 if (t2
->specific
->nopass
)
12823 else if (t2
->specific
->pass_arg
)
12824 pass2
= t2
->specific
->pass_arg
;
12827 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12829 pass2
= dummy_args
->sym
->name
;
12834 /* Compare the interfaces. */
12835 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12836 NULL
, 0, pass1
, pass2
))
12838 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12839 sym1
->name
, sym2
->name
, generic_name
, &where
);
12847 /* Worker function for resolving a generic procedure binding; this is used to
12848 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12850 The difference between those cases is finding possible inherited bindings
12851 that are overridden, as one has to look for them in tb_sym_root,
12852 tb_uop_root or tb_op, respectively. Thus the caller must already find
12853 the super-type and set p->overridden correctly. */
12856 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12857 gfc_typebound_proc
* p
, const char* name
)
12859 gfc_tbp_generic
* target
;
12860 gfc_symtree
* first_target
;
12861 gfc_symtree
* inherited
;
12863 gcc_assert (p
&& p
->is_generic
);
12865 /* Try to find the specific bindings for the symtrees in our target-list. */
12866 gcc_assert (p
->u
.generic
);
12867 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12868 if (!target
->specific
)
12870 gfc_typebound_proc
* overridden_tbp
;
12871 gfc_tbp_generic
* g
;
12872 const char* target_name
;
12874 target_name
= target
->specific_st
->name
;
12876 /* Defined for this type directly. */
12877 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12879 target
->specific
= target
->specific_st
->n
.tb
;
12880 goto specific_found
;
12883 /* Look for an inherited specific binding. */
12886 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12891 gcc_assert (inherited
->n
.tb
);
12892 target
->specific
= inherited
->n
.tb
;
12893 goto specific_found
;
12897 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12898 " at %L", target_name
, name
, &p
->where
);
12901 /* Once we've found the specific binding, check it is not ambiguous with
12902 other specifics already found or inherited for the same GENERIC. */
12904 gcc_assert (target
->specific
);
12906 /* This must really be a specific binding! */
12907 if (target
->specific
->is_generic
)
12909 gfc_error ("GENERIC %qs at %L must target a specific binding,"
12910 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
12914 /* Check those already resolved on this type directly. */
12915 for (g
= p
->u
.generic
; g
; g
= g
->next
)
12916 if (g
!= target
&& g
->specific
12917 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12920 /* Check for ambiguity with inherited specific targets. */
12921 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
12922 overridden_tbp
= overridden_tbp
->overridden
)
12923 if (overridden_tbp
->is_generic
)
12925 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
12927 gcc_assert (g
->specific
);
12928 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12934 /* If we attempt to "overwrite" a specific binding, this is an error. */
12935 if (p
->overridden
&& !p
->overridden
->is_generic
)
12937 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
12938 " the same name", name
, &p
->where
);
12942 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
12943 all must have the same attributes here. */
12944 first_target
= p
->u
.generic
->specific
->u
.specific
;
12945 gcc_assert (first_target
);
12946 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
12947 p
->function
= first_target
->n
.sym
->attr
.function
;
12953 /* Resolve a GENERIC procedure binding for a derived type. */
12956 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
12958 gfc_symbol
* super_type
;
12960 /* Find the overridden binding if any. */
12961 st
->n
.tb
->overridden
= NULL
;
12962 super_type
= gfc_get_derived_super_type (derived
);
12965 gfc_symtree
* overridden
;
12966 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
12969 if (overridden
&& overridden
->n
.tb
)
12970 st
->n
.tb
->overridden
= overridden
->n
.tb
;
12973 /* Resolve using worker function. */
12974 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
12978 /* Retrieve the target-procedure of an operator binding and do some checks in
12979 common for intrinsic and user-defined type-bound operators. */
12982 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
12984 gfc_symbol
* target_proc
;
12986 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
12987 target_proc
= target
->specific
->u
.specific
->n
.sym
;
12988 gcc_assert (target_proc
);
12990 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
12991 if (target
->specific
->nopass
)
12993 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
12997 return target_proc
;
13001 /* Resolve a type-bound intrinsic operator. */
13004 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13005 gfc_typebound_proc
* p
)
13007 gfc_symbol
* super_type
;
13008 gfc_tbp_generic
* target
;
13010 /* If there's already an error here, do nothing (but don't fail again). */
13014 /* Operators should always be GENERIC bindings. */
13015 gcc_assert (p
->is_generic
);
13017 /* Look for an overridden binding. */
13018 super_type
= gfc_get_derived_super_type (derived
);
13019 if (super_type
&& super_type
->f2k_derived
)
13020 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13023 p
->overridden
= NULL
;
13025 /* Resolve general GENERIC properties using worker function. */
13026 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13029 /* Check the targets to be procedures of correct interface. */
13030 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13032 gfc_symbol
* target_proc
;
13034 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13038 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13041 /* Add target to non-typebound operator list. */
13042 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13043 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13045 gfc_interface
*head
, *intr
;
13047 /* Preempt 'gfc_check_new_interface' for submodules, where the
13048 mechanism for handling module procedures winds up resolving
13049 operator interfaces twice and would otherwise cause an error. */
13050 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13051 if (intr
->sym
== target_proc
13052 && target_proc
->attr
.used_in_submodule
)
13055 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13056 target_proc
, p
->where
))
13058 head
= derived
->ns
->op
[op
];
13059 intr
= gfc_get_interface ();
13060 intr
->sym
= target_proc
;
13061 intr
->where
= p
->where
;
13063 derived
->ns
->op
[op
] = intr
;
13075 /* Resolve a type-bound user operator (tree-walker callback). */
13077 static gfc_symbol
* resolve_bindings_derived
;
13078 static bool resolve_bindings_result
;
13080 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13083 resolve_typebound_user_op (gfc_symtree
* stree
)
13085 gfc_symbol
* super_type
;
13086 gfc_tbp_generic
* target
;
13088 gcc_assert (stree
&& stree
->n
.tb
);
13090 if (stree
->n
.tb
->error
)
13093 /* Operators should always be GENERIC bindings. */
13094 gcc_assert (stree
->n
.tb
->is_generic
);
13096 /* Find overridden procedure, if any. */
13097 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13098 if (super_type
&& super_type
->f2k_derived
)
13100 gfc_symtree
* overridden
;
13101 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13102 stree
->name
, true, NULL
);
13104 if (overridden
&& overridden
->n
.tb
)
13105 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13108 stree
->n
.tb
->overridden
= NULL
;
13110 /* Resolve basically using worker function. */
13111 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13114 /* Check the targets to be functions of correct interface. */
13115 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13117 gfc_symbol
* target_proc
;
13119 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13123 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13130 resolve_bindings_result
= false;
13131 stree
->n
.tb
->error
= 1;
13135 /* Resolve the type-bound procedures for a derived type. */
13138 resolve_typebound_procedure (gfc_symtree
* stree
)
13142 gfc_symbol
* me_arg
;
13143 gfc_symbol
* super_type
;
13144 gfc_component
* comp
;
13146 gcc_assert (stree
);
13148 /* Undefined specific symbol from GENERIC target definition. */
13152 if (stree
->n
.tb
->error
)
13155 /* If this is a GENERIC binding, use that routine. */
13156 if (stree
->n
.tb
->is_generic
)
13158 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13163 /* Get the target-procedure to check it. */
13164 gcc_assert (!stree
->n
.tb
->is_generic
);
13165 gcc_assert (stree
->n
.tb
->u
.specific
);
13166 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13167 where
= stree
->n
.tb
->where
;
13169 /* Default access should already be resolved from the parser. */
13170 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13172 if (stree
->n
.tb
->deferred
)
13174 if (!check_proc_interface (proc
, &where
))
13179 /* Check for F08:C465. */
13180 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13181 || (proc
->attr
.proc
!= PROC_MODULE
13182 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13183 || proc
->attr
.abstract
)
13185 gfc_error ("%qs must be a module procedure or an external procedure with"
13186 " an explicit interface at %L", proc
->name
, &where
);
13191 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13192 stree
->n
.tb
->function
= proc
->attr
.function
;
13194 /* Find the super-type of the current derived type. We could do this once and
13195 store in a global if speed is needed, but as long as not I believe this is
13196 more readable and clearer. */
13197 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13199 /* If PASS, resolve and check arguments if not already resolved / loaded
13200 from a .mod file. */
13201 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13203 gfc_formal_arglist
*dummy_args
;
13205 dummy_args
= gfc_sym_get_dummy_args (proc
);
13206 if (stree
->n
.tb
->pass_arg
)
13208 gfc_formal_arglist
*i
;
13210 /* If an explicit passing argument name is given, walk the arg-list
13211 and look for it. */
13214 stree
->n
.tb
->pass_arg_num
= 1;
13215 for (i
= dummy_args
; i
; i
= i
->next
)
13217 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13222 ++stree
->n
.tb
->pass_arg_num
;
13227 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13229 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13230 stree
->n
.tb
->pass_arg
);
13236 /* Otherwise, take the first one; there should in fact be at least
13238 stree
->n
.tb
->pass_arg_num
= 1;
13241 gfc_error ("Procedure %qs with PASS at %L must have at"
13242 " least one argument", proc
->name
, &where
);
13245 me_arg
= dummy_args
->sym
;
13248 /* Now check that the argument-type matches and the passed-object
13249 dummy argument is generally fine. */
13251 gcc_assert (me_arg
);
13253 if (me_arg
->ts
.type
!= BT_CLASS
)
13255 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13256 " at %L", proc
->name
, &where
);
13260 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13261 != resolve_bindings_derived
)
13263 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13264 " the derived-type %qs", me_arg
->name
, proc
->name
,
13265 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13269 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13270 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13272 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13273 " scalar", proc
->name
, &where
);
13276 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13278 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13279 " be ALLOCATABLE", proc
->name
, &where
);
13282 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13284 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13285 " be POINTER", proc
->name
, &where
);
13290 /* If we are extending some type, check that we don't override a procedure
13291 flagged NON_OVERRIDABLE. */
13292 stree
->n
.tb
->overridden
= NULL
;
13295 gfc_symtree
* overridden
;
13296 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13297 stree
->name
, true, NULL
);
13301 if (overridden
->n
.tb
)
13302 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13304 if (!gfc_check_typebound_override (stree
, overridden
))
13309 /* See if there's a name collision with a component directly in this type. */
13310 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13311 if (!strcmp (comp
->name
, stree
->name
))
13313 gfc_error ("Procedure %qs at %L has the same name as a component of"
13315 stree
->name
, &where
, resolve_bindings_derived
->name
);
13319 /* Try to find a name collision with an inherited component. */
13320 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13323 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13324 " component of %qs",
13325 stree
->name
, &where
, resolve_bindings_derived
->name
);
13329 stree
->n
.tb
->error
= 0;
13333 resolve_bindings_result
= false;
13334 stree
->n
.tb
->error
= 1;
13339 resolve_typebound_procedures (gfc_symbol
* derived
)
13342 gfc_symbol
* super_type
;
13344 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13347 super_type
= gfc_get_derived_super_type (derived
);
13349 resolve_symbol (super_type
);
13351 resolve_bindings_derived
= derived
;
13352 resolve_bindings_result
= true;
13354 if (derived
->f2k_derived
->tb_sym_root
)
13355 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13356 &resolve_typebound_procedure
);
13358 if (derived
->f2k_derived
->tb_uop_root
)
13359 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13360 &resolve_typebound_user_op
);
13362 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13364 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13365 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13366 (gfc_intrinsic_op
)op
, p
))
13367 resolve_bindings_result
= false;
13370 return resolve_bindings_result
;
13374 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13375 to give all identical derived types the same backend_decl. */
13377 add_dt_to_dt_list (gfc_symbol
*derived
)
13379 gfc_dt_list
*dt_list
;
13381 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13382 if (derived
== dt_list
->derived
)
13385 dt_list
= gfc_get_dt_list ();
13386 dt_list
->next
= gfc_derived_types
;
13387 dt_list
->derived
= derived
;
13388 gfc_derived_types
= dt_list
;
13392 /* Ensure that a derived-type is really not abstract, meaning that every
13393 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13396 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13401 if (!ensure_not_abstract_walker (sub
, st
->left
))
13403 if (!ensure_not_abstract_walker (sub
, st
->right
))
13406 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13408 gfc_symtree
* overriding
;
13409 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13412 gcc_assert (overriding
->n
.tb
);
13413 if (overriding
->n
.tb
->deferred
)
13415 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13416 " %qs is DEFERRED and not overridden",
13417 sub
->name
, &sub
->declared_at
, st
->name
);
13426 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13428 /* The algorithm used here is to recursively travel up the ancestry of sub
13429 and for each ancestor-type, check all bindings. If any of them is
13430 DEFERRED, look it up starting from sub and see if the found (overriding)
13431 binding is not DEFERRED.
13432 This is not the most efficient way to do this, but it should be ok and is
13433 clearer than something sophisticated. */
13435 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13437 if (!ancestor
->attr
.abstract
)
13440 /* Walk bindings of this ancestor. */
13441 if (ancestor
->f2k_derived
)
13444 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13449 /* Find next ancestor type and recurse on it. */
13450 ancestor
= gfc_get_derived_super_type (ancestor
);
13452 return ensure_not_abstract (sub
, ancestor
);
13458 /* This check for typebound defined assignments is done recursively
13459 since the order in which derived types are resolved is not always in
13460 order of the declarations. */
13463 check_defined_assignments (gfc_symbol
*derived
)
13467 for (c
= derived
->components
; c
; c
= c
->next
)
13469 if (!gfc_bt_struct (c
->ts
.type
)
13471 || c
->attr
.allocatable
13472 || c
->attr
.proc_pointer_comp
13473 || c
->attr
.class_pointer
13474 || c
->attr
.proc_pointer
)
13477 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13478 || (c
->ts
.u
.derived
->f2k_derived
13479 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13481 derived
->attr
.defined_assign_comp
= 1;
13485 check_defined_assignments (c
->ts
.u
.derived
);
13486 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13488 derived
->attr
.defined_assign_comp
= 1;
13495 /* Resolve a single component of a derived type or structure. */
13498 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13500 gfc_symbol
*super_type
;
13502 if (c
->attr
.artificial
)
13505 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
)
13509 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13510 && c
->attr
.codimension
13511 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13513 gfc_error ("Coarray component %qs at %L must be allocatable with "
13514 "deferred shape", c
->name
, &c
->loc
);
13519 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13520 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13522 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13523 "shall not be a coarray", c
->name
, &c
->loc
);
13528 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13529 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13530 || c
->attr
.allocatable
))
13532 gfc_error ("Component %qs at %L with coarray component "
13533 "shall be a nonpointer, nonallocatable scalar",
13539 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13541 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13542 "is not an array pointer", c
->name
, &c
->loc
);
13546 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13548 gfc_symbol
*ifc
= c
->ts
.interface
;
13550 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13556 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13558 /* Resolve interface and copy attributes. */
13559 if (ifc
->formal
&& !ifc
->formal_ns
)
13560 resolve_symbol (ifc
);
13561 if (ifc
->attr
.intrinsic
)
13562 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13566 c
->ts
= ifc
->result
->ts
;
13567 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13568 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13569 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13570 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13571 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13576 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13577 c
->attr
.pointer
= ifc
->attr
.pointer
;
13578 c
->attr
.dimension
= ifc
->attr
.dimension
;
13579 c
->as
= gfc_copy_array_spec (ifc
->as
);
13580 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13582 c
->ts
.interface
= ifc
;
13583 c
->attr
.function
= ifc
->attr
.function
;
13584 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13586 c
->attr
.pure
= ifc
->attr
.pure
;
13587 c
->attr
.elemental
= ifc
->attr
.elemental
;
13588 c
->attr
.recursive
= ifc
->attr
.recursive
;
13589 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13590 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13591 /* Copy char length. */
13592 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13594 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13595 if (cl
->length
&& !cl
->resolved
13596 && !gfc_resolve_expr (cl
->length
))
13605 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13607 /* Since PPCs are not implicitly typed, a PPC without an explicit
13608 interface must be a subroutine. */
13609 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13612 /* Procedure pointer components: Check PASS arg. */
13613 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13614 && !sym
->attr
.vtype
)
13616 gfc_symbol
* me_arg
;
13618 if (c
->tb
->pass_arg
)
13620 gfc_formal_arglist
* i
;
13622 /* If an explicit passing argument name is given, walk the arg-list
13623 and look for it. */
13626 c
->tb
->pass_arg_num
= 1;
13627 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13629 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13634 c
->tb
->pass_arg_num
++;
13639 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13640 "at %L has no argument %qs", c
->name
,
13641 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13648 /* Otherwise, take the first one; there should in fact be at least
13650 c
->tb
->pass_arg_num
= 1;
13651 if (!c
->ts
.interface
->formal
)
13653 gfc_error ("Procedure pointer component %qs with PASS at %L "
13654 "must have at least one argument",
13659 me_arg
= c
->ts
.interface
->formal
->sym
;
13662 /* Now check that the argument-type matches. */
13663 gcc_assert (me_arg
);
13664 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13665 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13666 || (me_arg
->ts
.type
== BT_CLASS
13667 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13669 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13670 " the derived type %qs", me_arg
->name
, c
->name
,
13671 me_arg
->name
, &c
->loc
, sym
->name
);
13676 /* Check for C453. */
13677 if (me_arg
->attr
.dimension
)
13679 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13680 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13686 if (me_arg
->attr
.pointer
)
13688 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13689 "may not have the POINTER attribute", me_arg
->name
,
13690 c
->name
, me_arg
->name
, &c
->loc
);
13695 if (me_arg
->attr
.allocatable
)
13697 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13698 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13699 me_arg
->name
, &c
->loc
);
13704 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13706 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13707 " at %L", c
->name
, &c
->loc
);
13713 /* Check type-spec if this is not the parent-type component. */
13714 if (((sym
->attr
.is_class
13715 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13716 || c
!= sym
->components
->ts
.u
.derived
->components
))
13717 || (!sym
->attr
.is_class
13718 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13719 && !sym
->attr
.vtype
13720 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13723 super_type
= gfc_get_derived_super_type (sym
);
13725 /* If this type is an extension, set the accessibility of the parent
13728 && ((sym
->attr
.is_class
13729 && c
== sym
->components
->ts
.u
.derived
->components
)
13730 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13731 && strcmp (super_type
->name
, c
->name
) == 0)
13732 c
->attr
.access
= super_type
->attr
.access
;
13734 /* If this type is an extension, see if this component has the same name
13735 as an inherited type-bound procedure. */
13736 if (super_type
&& !sym
->attr
.is_class
13737 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13739 gfc_error ("Component %qs of %qs at %L has the same name as an"
13740 " inherited type-bound procedure",
13741 c
->name
, sym
->name
, &c
->loc
);
13745 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13746 && !c
->ts
.deferred
)
13748 if (c
->ts
.u
.cl
->length
== NULL
13749 || (!resolve_charlen(c
->ts
.u
.cl
))
13750 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13752 gfc_error ("Character length of component %qs needs to "
13753 "be a constant specification expression at %L",
13755 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13760 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13761 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13763 gfc_error ("Character component %qs of %qs at %L with deferred "
13764 "length must be a POINTER or ALLOCATABLE",
13765 c
->name
, sym
->name
, &c
->loc
);
13769 /* Add the hidden deferred length field. */
13770 if (c
->ts
.type
== BT_CHARACTER
13771 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13772 && !c
->attr
.function
13773 && !sym
->attr
.is_class
)
13775 char name
[GFC_MAX_SYMBOL_LEN
+9];
13776 gfc_component
*strlen
;
13777 sprintf (name
, "_%s_length", c
->name
);
13778 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13779 if (strlen
== NULL
)
13781 if (!gfc_add_component (sym
, name
, &strlen
))
13783 strlen
->ts
.type
= BT_INTEGER
;
13784 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13785 strlen
->attr
.access
= ACCESS_PRIVATE
;
13786 strlen
->attr
.artificial
= 1;
13790 if (c
->ts
.type
== BT_DERIVED
13791 && sym
->component_access
!= ACCESS_PRIVATE
13792 && gfc_check_symbol_access (sym
)
13793 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13794 && !c
->ts
.u
.derived
->attr
.use_assoc
13795 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13796 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13797 "PRIVATE type and cannot be a component of "
13798 "%qs, which is PUBLIC at %L", c
->name
,
13799 sym
->name
, &sym
->declared_at
))
13802 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13804 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13805 "type %s", c
->name
, &c
->loc
, sym
->name
);
13809 if (sym
->attr
.sequence
)
13811 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13813 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13814 "not have the SEQUENCE attribute",
13815 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13820 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13821 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13822 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13823 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13824 CLASS_DATA (c
)->ts
.u
.derived
13825 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13827 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13828 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13829 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13831 gfc_error ("The pointer component %qs of %qs at %L is a type "
13832 "that has not been declared", c
->name
, sym
->name
,
13837 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13838 && CLASS_DATA (c
)->attr
.class_pointer
13839 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13840 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13841 && !UNLIMITED_POLY (c
))
13843 gfc_error ("The pointer component %qs of %qs at %L is a type "
13844 "that has not been declared", c
->name
, sym
->name
,
13849 /* If an allocatable component derived type is of the same type as
13850 the enclosing derived type, we need a vtable generating so that
13851 the __deallocate procedure is created. */
13852 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13853 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13854 gfc_find_vtab (&c
->ts
);
13856 /* Ensure that all the derived type components are put on the
13857 derived type list; even in formal namespaces, where derived type
13858 pointer components might not have been declared. */
13859 if (c
->ts
.type
== BT_DERIVED
13861 && c
->ts
.u
.derived
->components
13863 && sym
!= c
->ts
.u
.derived
)
13864 add_dt_to_dt_list (c
->ts
.u
.derived
);
13866 if (!gfc_resolve_array_spec (c
->as
,
13867 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13868 || c
->attr
.allocatable
)))
13871 if (c
->initializer
&& !sym
->attr
.vtype
13872 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
13873 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13880 /* Be nice about the locus for a structure expression - show the locus of the
13881 first non-null sub-expression if we can. */
13884 cons_where (gfc_expr
*struct_expr
)
13886 gfc_constructor
*cons
;
13888 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13890 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13891 for (; cons
; cons
= gfc_constructor_next (cons
))
13893 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13894 return &cons
->expr
->where
;
13897 return &struct_expr
->where
;
13900 /* Resolve the components of a structure type. Much less work than derived
13904 resolve_fl_struct (gfc_symbol
*sym
)
13907 gfc_expr
*init
= NULL
;
13910 /* Make sure UNIONs do not have overlapping initializers. */
13911 if (sym
->attr
.flavor
== FL_UNION
)
13913 for (c
= sym
->components
; c
; c
= c
->next
)
13915 if (init
&& c
->initializer
)
13917 gfc_error ("Conflicting initializers in union at %L and %L",
13918 cons_where (init
), cons_where (c
->initializer
));
13919 gfc_free_expr (c
->initializer
);
13920 c
->initializer
= NULL
;
13923 init
= c
->initializer
;
13928 for (c
= sym
->components
; c
; c
= c
->next
)
13929 if (!resolve_component (c
, sym
))
13935 if (sym
->components
)
13936 add_dt_to_dt_list (sym
);
13942 /* Resolve the components of a derived type. This does not have to wait until
13943 resolution stage, but can be done as soon as the dt declaration has been
13947 resolve_fl_derived0 (gfc_symbol
*sym
)
13949 gfc_symbol
* super_type
;
13951 gfc_formal_arglist
*f
;
13954 if (sym
->attr
.unlimited_polymorphic
)
13957 super_type
= gfc_get_derived_super_type (sym
);
13960 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
13962 gfc_error ("As extending type %qs at %L has a coarray component, "
13963 "parent type %qs shall also have one", sym
->name
,
13964 &sym
->declared_at
, super_type
->name
);
13968 /* Ensure the extended type gets resolved before we do. */
13969 if (super_type
&& !resolve_fl_derived0 (super_type
))
13972 /* An ABSTRACT type must be extensible. */
13973 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
13975 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
13976 sym
->name
, &sym
->declared_at
);
13980 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
13984 for ( ; c
!= NULL
; c
= c
->next
)
13985 if (!resolve_component (c
, sym
))
13991 check_defined_assignments (sym
);
13993 if (!sym
->attr
.defined_assign_comp
&& super_type
)
13994 sym
->attr
.defined_assign_comp
13995 = super_type
->attr
.defined_assign_comp
;
13997 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
13998 all DEFERRED bindings are overridden. */
13999 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14000 && !sym
->attr
.is_class
14001 && !ensure_not_abstract (sym
, super_type
))
14004 /* Check that there is a component for every PDT parameter. */
14005 if (sym
->attr
.pdt_template
)
14007 for (f
= sym
->formal
; f
; f
= f
->next
)
14009 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14012 gfc_error ("Parameterized type %qs does not have a component "
14013 "corresponding to parameter %qs at %L", sym
->name
,
14014 f
->sym
->name
, &sym
->declared_at
);
14020 /* Add derived type to the derived type list. */
14021 add_dt_to_dt_list (sym
);
14027 /* The following procedure does the full resolution of a derived type,
14028 including resolution of all type-bound procedures (if present). In contrast
14029 to 'resolve_fl_derived0' this can only be done after the module has been
14030 parsed completely. */
14033 resolve_fl_derived (gfc_symbol
*sym
)
14035 gfc_symbol
*gen_dt
= NULL
;
14037 if (sym
->attr
.unlimited_polymorphic
)
14040 if (!sym
->attr
.is_class
)
14041 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14042 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14043 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14044 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14045 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14046 "%qs at %L being the same name as derived "
14047 "type at %L", sym
->name
,
14048 gen_dt
->generic
->sym
== sym
14049 ? gen_dt
->generic
->next
->sym
->name
14050 : gen_dt
->generic
->sym
->name
,
14051 gen_dt
->generic
->sym
== sym
14052 ? &gen_dt
->generic
->next
->sym
->declared_at
14053 : &gen_dt
->generic
->sym
->declared_at
,
14054 &sym
->declared_at
))
14057 /* Resolve the finalizer procedures. */
14058 if (!gfc_resolve_finalizers (sym
, NULL
))
14061 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14063 /* Fix up incomplete CLASS symbols. */
14064 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14065 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14067 /* Nothing more to do for unlimited polymorphic entities. */
14068 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14070 else if (vptr
->ts
.u
.derived
== NULL
)
14072 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14074 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14075 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14080 if (!resolve_fl_derived0 (sym
))
14083 /* Resolve the type-bound procedures. */
14084 if (!resolve_typebound_procedures (sym
))
14087 /* Generate module vtables subject to their accessibility and their not
14088 being vtables or pdt templates. If this is not done class declarations
14089 in external procedures wind up with their own version and so SELECT TYPE
14090 fails because the vptrs do not have the same address. */
14091 if (gfc_option
.allow_std
& GFC_STD_F2003
14092 && sym
->ns
->proc_name
14093 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14094 && sym
->attr
.access
!= ACCESS_PRIVATE
14095 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14097 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14098 gfc_set_sym_referenced (vtab
);
14106 resolve_fl_namelist (gfc_symbol
*sym
)
14111 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14113 /* Check again, the check in match only works if NAMELIST comes
14115 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14117 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14118 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14122 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14123 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14124 "with assumed shape in namelist %qs at %L",
14125 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14128 if (is_non_constant_shape_array (nl
->sym
)
14129 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14130 "with nonconstant shape in namelist %qs at %L",
14131 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14134 if (nl
->sym
->ts
.type
== BT_CHARACTER
14135 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14136 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14137 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14138 "nonconstant character length in "
14139 "namelist %qs at %L", nl
->sym
->name
,
14140 sym
->name
, &sym
->declared_at
))
14145 /* Reject PRIVATE objects in a PUBLIC namelist. */
14146 if (gfc_check_symbol_access (sym
))
14148 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14150 if (!nl
->sym
->attr
.use_assoc
14151 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14152 && !gfc_check_symbol_access (nl
->sym
))
14154 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14155 "cannot be member of PUBLIC namelist %qs at %L",
14156 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14160 if (nl
->sym
->ts
.type
== BT_DERIVED
14161 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14162 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14164 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14165 "namelist %qs at %L with ALLOCATABLE "
14166 "or POINTER components", nl
->sym
->name
,
14167 sym
->name
, &sym
->declared_at
))
14172 /* Types with private components that came here by USE-association. */
14173 if (nl
->sym
->ts
.type
== BT_DERIVED
14174 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14176 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14177 "components and cannot be member of namelist %qs at %L",
14178 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14182 /* Types with private components that are defined in the same module. */
14183 if (nl
->sym
->ts
.type
== BT_DERIVED
14184 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14185 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14187 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14188 "cannot be a member of PUBLIC namelist %qs at %L",
14189 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14196 /* 14.1.2 A module or internal procedure represent local entities
14197 of the same type as a namelist member and so are not allowed. */
14198 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14200 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14203 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14204 if ((nl
->sym
== sym
->ns
->proc_name
)
14206 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14211 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14212 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14214 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14215 "attribute in %qs at %L", nlsym
->name
,
14216 &sym
->declared_at
);
14223 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14224 nl
->sym
->attr
.asynchronous
= 1;
14231 resolve_fl_parameter (gfc_symbol
*sym
)
14233 /* A parameter array's shape needs to be constant. */
14234 if (sym
->as
!= NULL
14235 && (sym
->as
->type
== AS_DEFERRED
14236 || is_non_constant_shape_array (sym
)))
14238 gfc_error ("Parameter array %qs at %L cannot be automatic "
14239 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14243 /* Constraints on deferred type parameter. */
14244 if (!deferred_requirements (sym
))
14247 /* Make sure a parameter that has been implicitly typed still
14248 matches the implicit type, since PARAMETER statements can precede
14249 IMPLICIT statements. */
14250 if (sym
->attr
.implicit_type
14251 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14254 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14255 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14259 /* Make sure the types of derived parameters are consistent. This
14260 type checking is deferred until resolution because the type may
14261 refer to a derived type from the host. */
14262 if (sym
->ts
.type
== BT_DERIVED
14263 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14265 gfc_error ("Incompatible derived type in PARAMETER at %L",
14266 &sym
->value
->where
);
14270 /* F03:C509,C514. */
14271 if (sym
->ts
.type
== BT_CLASS
)
14273 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14274 sym
->name
, &sym
->declared_at
);
14282 /* Called by resolve_symbol to chack PDTs. */
14285 resolve_pdt (gfc_symbol
* sym
)
14287 gfc_symbol
*derived
= NULL
;
14288 gfc_actual_arglist
*param
;
14290 bool const_len_exprs
= true;
14291 bool assumed_len_exprs
= false;
14293 if (sym
->ts
.type
== BT_DERIVED
)
14294 derived
= sym
->ts
.u
.derived
;
14295 else if (sym
->ts
.type
== BT_CLASS
)
14296 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14298 gcc_unreachable ();
14300 gcc_assert (derived
->attr
.pdt_type
);
14302 for (param
= sym
->param_list
; param
; param
= param
->next
)
14304 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14306 if (c
->attr
.pdt_kind
)
14309 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14310 && c
->attr
.pdt_len
)
14311 const_len_exprs
= false;
14312 else if (param
->spec_type
== SPEC_ASSUMED
)
14313 assumed_len_exprs
= true;
14316 if (!const_len_exprs
14317 && (sym
->ns
->proc_name
->attr
.is_main_program
14318 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14319 || sym
->attr
.save
!= SAVE_NONE
))
14320 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14321 "SAVE attribute or be a variable declared in the "
14322 "main program, a module or a submodule(F08/C513)",
14323 sym
->name
, &sym
->declared_at
);
14325 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14326 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14327 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14328 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14329 sym
->name
, &sym
->declared_at
);
14333 /* Do anything necessary to resolve a symbol. Right now, we just
14334 assume that an otherwise unknown symbol is a variable. This sort
14335 of thing commonly happens for symbols in module. */
14338 resolve_symbol (gfc_symbol
*sym
)
14340 int check_constant
, mp_flag
;
14341 gfc_symtree
*symtree
;
14342 gfc_symtree
*this_symtree
;
14345 symbol_attribute class_attr
;
14346 gfc_array_spec
*as
;
14347 bool saved_specification_expr
;
14353 /* No symbol will ever have union type; only components can be unions.
14354 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14355 (just like derived type declaration symbols have flavor FL_DERIVED). */
14356 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14358 /* Coarrayed polymorphic objects with allocatable or pointer components are
14359 yet unsupported for -fcoarray=lib. */
14360 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14361 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14362 && CLASS_DATA (sym
)->attr
.codimension
14363 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14364 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14366 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14367 "type coarrays at %L are unsupported", &sym
->declared_at
);
14371 if (sym
->attr
.artificial
)
14374 if (sym
->attr
.unlimited_polymorphic
)
14377 if (sym
->attr
.flavor
== FL_UNKNOWN
14378 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14379 && !sym
->attr
.generic
&& !sym
->attr
.external
14380 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14381 && sym
->ts
.type
== BT_UNKNOWN
))
14384 /* If we find that a flavorless symbol is an interface in one of the
14385 parent namespaces, find its symtree in this namespace, free the
14386 symbol and set the symtree to point to the interface symbol. */
14387 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14389 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14390 if (symtree
&& (symtree
->n
.sym
->generic
||
14391 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14392 && sym
->ns
->construct_entities
)))
14394 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14396 if (this_symtree
->n
.sym
== sym
)
14398 symtree
->n
.sym
->refs
++;
14399 gfc_release_symbol (sym
);
14400 this_symtree
->n
.sym
= symtree
->n
.sym
;
14406 /* Otherwise give it a flavor according to such attributes as
14408 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14409 && sym
->attr
.intrinsic
== 0)
14410 sym
->attr
.flavor
= FL_VARIABLE
;
14411 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14413 sym
->attr
.flavor
= FL_PROCEDURE
;
14414 if (sym
->attr
.dimension
)
14415 sym
->attr
.function
= 1;
14419 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14420 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14422 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14423 && !resolve_procedure_interface (sym
))
14426 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14427 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14429 if (sym
->attr
.external
)
14430 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14431 "at %L", &sym
->declared_at
);
14433 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14434 "at %L", &sym
->declared_at
);
14439 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14442 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14443 && !resolve_fl_struct (sym
))
14446 /* Symbols that are module procedures with results (functions) have
14447 the types and array specification copied for type checking in
14448 procedures that call them, as well as for saving to a module
14449 file. These symbols can't stand the scrutiny that their results
14451 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14453 /* Make sure that the intrinsic is consistent with its internal
14454 representation. This needs to be done before assigning a default
14455 type to avoid spurious warnings. */
14456 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14457 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14460 /* Resolve associate names. */
14462 resolve_assoc_var (sym
, true);
14464 /* Assign default type to symbols that need one and don't have one. */
14465 if (sym
->ts
.type
== BT_UNKNOWN
)
14467 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14469 gfc_set_default_type (sym
, 1, NULL
);
14472 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14473 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14474 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14475 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14477 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14479 /* The specific case of an external procedure should emit an error
14480 in the case that there is no implicit type. */
14483 if (!sym
->attr
.mixed_entry_master
)
14484 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14488 /* Result may be in another namespace. */
14489 resolve_symbol (sym
->result
);
14491 if (!sym
->result
->attr
.proc_pointer
)
14493 sym
->ts
= sym
->result
->ts
;
14494 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14495 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14496 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14497 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14498 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14503 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14505 bool saved_specification_expr
= specification_expr
;
14506 specification_expr
= true;
14507 gfc_resolve_array_spec (sym
->result
->as
, false);
14508 specification_expr
= saved_specification_expr
;
14511 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14513 as
= CLASS_DATA (sym
)->as
;
14514 class_attr
= CLASS_DATA (sym
)->attr
;
14515 class_attr
.pointer
= class_attr
.class_pointer
;
14519 class_attr
= sym
->attr
;
14524 if (sym
->attr
.contiguous
14525 && (!class_attr
.dimension
14526 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14527 && !class_attr
.pointer
)))
14529 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14530 "array pointer or an assumed-shape or assumed-rank array",
14531 sym
->name
, &sym
->declared_at
);
14535 /* Assumed size arrays and assumed shape arrays must be dummy
14536 arguments. Array-spec's of implied-shape should have been resolved to
14537 AS_EXPLICIT already. */
14541 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14542 specification expression. */
14543 if (as
->type
== AS_IMPLIED_SHAPE
)
14546 for (i
=0; i
<as
->rank
; i
++)
14548 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14550 gfc_error ("Bad specification for assumed size array at %L",
14551 &as
->lower
[i
]->where
);
14558 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14559 || as
->type
== AS_ASSUMED_SHAPE
)
14560 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14562 if (as
->type
== AS_ASSUMED_SIZE
)
14563 gfc_error ("Assumed size array at %L must be a dummy argument",
14564 &sym
->declared_at
);
14566 gfc_error ("Assumed shape array at %L must be a dummy argument",
14567 &sym
->declared_at
);
14570 /* TS 29113, C535a. */
14571 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14572 && !sym
->attr
.select_type_temporary
)
14574 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14575 &sym
->declared_at
);
14578 if (as
->type
== AS_ASSUMED_RANK
14579 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14581 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14582 "CODIMENSION attribute", &sym
->declared_at
);
14587 /* Make sure symbols with known intent or optional are really dummy
14588 variable. Because of ENTRY statement, this has to be deferred
14589 until resolution time. */
14591 if (!sym
->attr
.dummy
14592 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14594 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14598 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14600 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14601 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14605 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14607 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14608 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14610 gfc_error ("Character dummy variable %qs at %L with VALUE "
14611 "attribute must have constant length",
14612 sym
->name
, &sym
->declared_at
);
14616 if (sym
->ts
.is_c_interop
14617 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14619 gfc_error ("C interoperable character dummy variable %qs at %L "
14620 "with VALUE attribute must have length one",
14621 sym
->name
, &sym
->declared_at
);
14626 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14627 && sym
->ts
.u
.derived
->attr
.generic
)
14629 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14630 if (!sym
->ts
.u
.derived
)
14632 gfc_error ("The derived type %qs at %L is of type %qs, "
14633 "which has not been defined", sym
->name
,
14634 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14635 sym
->ts
.type
= BT_UNKNOWN
;
14640 /* Use the same constraints as TYPE(*), except for the type check
14641 and that only scalars and assumed-size arrays are permitted. */
14642 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14644 if (!sym
->attr
.dummy
)
14646 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14647 "a dummy argument", sym
->name
, &sym
->declared_at
);
14651 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14652 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14653 && sym
->ts
.type
!= BT_COMPLEX
)
14655 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14656 "of type TYPE(*) or of an numeric intrinsic type",
14657 sym
->name
, &sym
->declared_at
);
14661 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14662 || sym
->attr
.pointer
|| sym
->attr
.value
)
14664 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14665 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14666 "attribute", sym
->name
, &sym
->declared_at
);
14670 if (sym
->attr
.intent
== INTENT_OUT
)
14672 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14673 "have the INTENT(OUT) attribute",
14674 sym
->name
, &sym
->declared_at
);
14677 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14679 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14680 "either be a scalar or an assumed-size array",
14681 sym
->name
, &sym
->declared_at
);
14685 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14686 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14688 sym
->ts
.type
= BT_ASSUMED
;
14689 sym
->as
= gfc_get_array_spec ();
14690 sym
->as
->type
= AS_ASSUMED_SIZE
;
14692 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14694 else if (sym
->ts
.type
== BT_ASSUMED
)
14696 /* TS 29113, C407a. */
14697 if (!sym
->attr
.dummy
)
14699 gfc_error ("Assumed type of variable %s at %L is only permitted "
14700 "for dummy variables", sym
->name
, &sym
->declared_at
);
14703 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14704 || sym
->attr
.pointer
|| sym
->attr
.value
)
14706 gfc_error ("Assumed-type variable %s at %L may not have the "
14707 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14708 sym
->name
, &sym
->declared_at
);
14711 if (sym
->attr
.intent
== INTENT_OUT
)
14713 gfc_error ("Assumed-type variable %s at %L may not have the "
14714 "INTENT(OUT) attribute",
14715 sym
->name
, &sym
->declared_at
);
14718 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14720 gfc_error ("Assumed-type variable %s at %L shall not be an "
14721 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14726 /* If the symbol is marked as bind(c), that it is declared at module level
14727 scope and verify its type and kind. Do not do the latter for symbols
14728 that are implicitly typed because that is handled in
14729 gfc_set_default_type. Handle dummy arguments and procedure definitions
14730 separately. Also, anything that is use associated is not handled here
14731 but instead is handled in the module it is declared in. Finally, derived
14732 type definitions are allowed to be BIND(C) since that only implies that
14733 they're interoperable, and they are checked fully for interoperability
14734 when a variable is declared of that type. */
14735 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14736 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14737 && sym
->attr
.flavor
!= FL_DERIVED
)
14741 /* First, make sure the variable is declared at the
14742 module-level scope (J3/04-007, Section 15.3). */
14743 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14744 sym
->attr
.in_common
== 0)
14746 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14747 "is neither a COMMON block nor declared at the "
14748 "module level scope", sym
->name
, &(sym
->declared_at
));
14751 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14753 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14755 else if (sym
->attr
.implicit_type
== 0)
14757 /* If type() declaration, we need to verify that the components
14758 of the given type are all C interoperable, etc. */
14759 if (sym
->ts
.type
== BT_DERIVED
&&
14760 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14762 /* Make sure the user marked the derived type as BIND(C). If
14763 not, call the verify routine. This could print an error
14764 for the derived type more than once if multiple variables
14765 of that type are declared. */
14766 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14767 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14771 /* Verify the variable itself as C interoperable if it
14772 is BIND(C). It is not possible for this to succeed if
14773 the verify_bind_c_derived_type failed, so don't have to handle
14774 any error returned by verify_bind_c_derived_type. */
14775 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14776 sym
->common_block
);
14781 /* clear the is_bind_c flag to prevent reporting errors more than
14782 once if something failed. */
14783 sym
->attr
.is_bind_c
= 0;
14788 /* If a derived type symbol has reached this point, without its
14789 type being declared, we have an error. Notice that most
14790 conditions that produce undefined derived types have already
14791 been dealt with. However, the likes of:
14792 implicit type(t) (t) ..... call foo (t) will get us here if
14793 the type is not declared in the scope of the implicit
14794 statement. Change the type to BT_UNKNOWN, both because it is so
14795 and to prevent an ICE. */
14796 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14797 && sym
->ts
.u
.derived
->components
== NULL
14798 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14800 gfc_error ("The derived type %qs at %L is of type %qs, "
14801 "which has not been defined", sym
->name
,
14802 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14803 sym
->ts
.type
= BT_UNKNOWN
;
14807 /* Make sure that the derived type has been resolved and that the
14808 derived type is visible in the symbol's namespace, if it is a
14809 module function and is not PRIVATE. */
14810 if (sym
->ts
.type
== BT_DERIVED
14811 && sym
->ts
.u
.derived
->attr
.use_assoc
14812 && sym
->ns
->proc_name
14813 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14814 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14817 /* Unless the derived-type declaration is use associated, Fortran 95
14818 does not allow public entries of private derived types.
14819 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14820 161 in 95-006r3. */
14821 if (sym
->ts
.type
== BT_DERIVED
14822 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14823 && !sym
->ts
.u
.derived
->attr
.use_assoc
14824 && gfc_check_symbol_access (sym
)
14825 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14826 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14827 "derived type %qs",
14828 (sym
->attr
.flavor
== FL_PARAMETER
)
14829 ? "parameter" : "variable",
14830 sym
->name
, &sym
->declared_at
,
14831 sym
->ts
.u
.derived
->name
))
14834 /* F2008, C1302. */
14835 if (sym
->ts
.type
== BT_DERIVED
14836 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14837 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14838 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14839 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14841 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14842 "type LOCK_TYPE must be a coarray", sym
->name
,
14843 &sym
->declared_at
);
14847 /* TS18508, C702/C703. */
14848 if (sym
->ts
.type
== BT_DERIVED
14849 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14850 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14851 || sym
->ts
.u
.derived
->attr
.event_comp
)
14852 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14854 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14855 "type EVENT_TYPE must be a coarray", sym
->name
,
14856 &sym
->declared_at
);
14860 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14861 default initialization is defined (5.1.2.4.4). */
14862 if (sym
->ts
.type
== BT_DERIVED
14864 && sym
->attr
.intent
== INTENT_OUT
14866 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14868 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14870 if (c
->initializer
)
14872 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
14873 "ASSUMED SIZE and so cannot have a default initializer",
14874 sym
->name
, &sym
->declared_at
);
14881 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14882 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
14884 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
14885 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14890 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14891 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
14893 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
14894 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14899 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14900 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14901 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14902 || class_attr
.codimension
)
14903 && (sym
->attr
.result
|| sym
->result
== sym
))
14905 gfc_error ("Function result %qs at %L shall not be a coarray or have "
14906 "a coarray component", sym
->name
, &sym
->declared_at
);
14911 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
14912 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
14914 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14915 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
14920 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14921 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14922 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14923 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
14924 || class_attr
.allocatable
))
14926 gfc_error ("Variable %qs at %L with coarray component shall be a "
14927 "nonpointer, nonallocatable scalar, which is not a coarray",
14928 sym
->name
, &sym
->declared_at
);
14932 /* F2008, C526. The function-result case was handled above. */
14933 if (class_attr
.codimension
14934 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
14935 || sym
->attr
.select_type_temporary
14936 || sym
->attr
.associate_var
14937 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14938 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14939 || sym
->ns
->proc_name
->attr
.is_main_program
14940 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
14942 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
14943 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
14947 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
14948 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
14950 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
14951 "deferred shape", sym
->name
, &sym
->declared_at
);
14954 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
14955 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
14957 gfc_error ("Allocatable coarray variable %qs at %L must have "
14958 "deferred shape", sym
->name
, &sym
->declared_at
);
14963 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14964 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14965 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14966 || (class_attr
.codimension
&& class_attr
.allocatable
))
14967 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
14969 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
14970 "allocatable coarray or have coarray components",
14971 sym
->name
, &sym
->declared_at
);
14975 if (class_attr
.codimension
&& sym
->attr
.dummy
14976 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
14978 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
14979 "procedure %qs", sym
->name
, &sym
->declared_at
,
14980 sym
->ns
->proc_name
->name
);
14984 if (sym
->ts
.type
== BT_LOGICAL
14985 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
14986 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
14987 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
14990 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
14991 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
14993 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
14994 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
14995 "%L with non-C_Bool kind in BIND(C) procedure "
14996 "%qs", sym
->name
, &sym
->declared_at
,
14997 sym
->ns
->proc_name
->name
))
14999 else if (!gfc_logical_kinds
[i
].c_bool
15000 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15001 "%qs at %L with non-C_Bool kind in "
15002 "BIND(C) procedure %qs", sym
->name
,
15004 sym
->attr
.function
? sym
->name
15005 : sym
->ns
->proc_name
->name
))
15009 switch (sym
->attr
.flavor
)
15012 if (!resolve_fl_variable (sym
, mp_flag
))
15017 if (sym
->formal
&& !sym
->formal_ns
)
15019 /* Check that none of the arguments are a namelist. */
15020 gfc_formal_arglist
*formal
= sym
->formal
;
15022 for (; formal
; formal
= formal
->next
)
15023 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15025 gfc_error ("Namelist %qs can not be an argument to "
15026 "subroutine or function at %L",
15027 formal
->sym
->name
, &sym
->declared_at
);
15032 if (!resolve_fl_procedure (sym
, mp_flag
))
15037 if (!resolve_fl_namelist (sym
))
15042 if (!resolve_fl_parameter (sym
))
15050 /* Resolve array specifier. Check as well some constraints
15051 on COMMON blocks. */
15053 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15055 /* Set the formal_arg_flag so that check_conflict will not throw
15056 an error for host associated variables in the specification
15057 expression for an array_valued function. */
15058 if (sym
->attr
.function
&& sym
->as
)
15059 formal_arg_flag
= true;
15061 saved_specification_expr
= specification_expr
;
15062 specification_expr
= true;
15063 gfc_resolve_array_spec (sym
->as
, check_constant
);
15064 specification_expr
= saved_specification_expr
;
15066 formal_arg_flag
= false;
15068 /* Resolve formal namespaces. */
15069 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15070 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15071 gfc_resolve (sym
->formal_ns
);
15073 /* Make sure the formal namespace is present. */
15074 if (sym
->formal
&& !sym
->formal_ns
)
15076 gfc_formal_arglist
*formal
= sym
->formal
;
15077 while (formal
&& !formal
->sym
)
15078 formal
= formal
->next
;
15082 sym
->formal_ns
= formal
->sym
->ns
;
15083 if (sym
->ns
!= formal
->sym
->ns
)
15084 sym
->formal_ns
->refs
++;
15088 /* Check threadprivate restrictions. */
15089 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15090 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15091 && (!sym
->attr
.in_common
15092 && sym
->module
== NULL
15093 && (sym
->ns
->proc_name
== NULL
15094 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15095 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15097 /* Check omp declare target restrictions. */
15098 if (sym
->attr
.omp_declare_target
15099 && sym
->attr
.flavor
== FL_VARIABLE
15101 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15102 && (!sym
->attr
.in_common
15103 && sym
->module
== NULL
15104 && (sym
->ns
->proc_name
== NULL
15105 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15106 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15107 sym
->name
, &sym
->declared_at
);
15109 /* If we have come this far we can apply default-initializers, as
15110 described in 14.7.5, to those variables that have not already
15111 been assigned one. */
15112 if (sym
->ts
.type
== BT_DERIVED
15114 && !sym
->attr
.allocatable
15115 && !sym
->attr
.alloc_comp
)
15117 symbol_attribute
*a
= &sym
->attr
;
15119 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15120 && !a
->in_common
&& !a
->use_assoc
15122 && !((a
->function
|| a
->result
)
15124 || sym
->ts
.u
.derived
->attr
.alloc_comp
15125 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15126 && !(a
->function
&& sym
!= sym
->result
))
15127 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15128 apply_default_init (sym
);
15129 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15130 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15131 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15132 /* Mark the result symbol to be referenced, when it has allocatable
15134 sym
->result
->attr
.referenced
= 1;
15137 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15138 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15139 && !CLASS_DATA (sym
)->attr
.class_pointer
15140 && !CLASS_DATA (sym
)->attr
.allocatable
)
15141 apply_default_init (sym
);
15143 /* If this symbol has a type-spec, check it. */
15144 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15145 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15146 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15149 if (sym
->param_list
)
15154 /************* Resolve DATA statements *************/
15158 gfc_data_value
*vnode
;
15164 /* Advance the values structure to point to the next value in the data list. */
15167 next_data_value (void)
15169 while (mpz_cmp_ui (values
.left
, 0) == 0)
15172 if (values
.vnode
->next
== NULL
)
15175 values
.vnode
= values
.vnode
->next
;
15176 mpz_set (values
.left
, values
.vnode
->repeat
);
15184 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15190 ar_type mark
= AR_UNKNOWN
;
15192 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15198 if (!gfc_resolve_expr (var
->expr
))
15202 mpz_init_set_si (offset
, 0);
15205 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15206 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15207 e
= e
->value
.function
.actual
->expr
;
15209 if (e
->expr_type
!= EXPR_VARIABLE
)
15210 gfc_internal_error ("check_data_variable(): Bad expression");
15212 sym
= e
->symtree
->n
.sym
;
15214 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15216 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15217 sym
->name
, &sym
->declared_at
);
15220 if (e
->ref
== NULL
&& sym
->as
)
15222 gfc_error ("DATA array %qs at %L must be specified in a previous"
15223 " declaration", sym
->name
, where
);
15227 has_pointer
= sym
->attr
.pointer
;
15229 if (gfc_is_coindexed (e
))
15231 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15236 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15238 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15242 && ref
->type
== REF_ARRAY
15243 && ref
->u
.ar
.type
!= AR_FULL
)
15245 gfc_error ("DATA element %qs at %L is a pointer and so must "
15246 "be a full array", sym
->name
, where
);
15251 if (e
->rank
== 0 || has_pointer
)
15253 mpz_init_set_ui (size
, 1);
15260 /* Find the array section reference. */
15261 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15263 if (ref
->type
!= REF_ARRAY
)
15265 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15271 /* Set marks according to the reference pattern. */
15272 switch (ref
->u
.ar
.type
)
15280 /* Get the start position of array section. */
15281 gfc_get_section_index (ar
, section_index
, &offset
);
15286 gcc_unreachable ();
15289 if (!gfc_array_size (e
, &size
))
15291 gfc_error ("Nonconstant array section at %L in DATA statement",
15293 mpz_clear (offset
);
15300 while (mpz_cmp_ui (size
, 0) > 0)
15302 if (!next_data_value ())
15304 gfc_error ("DATA statement at %L has more variables than values",
15310 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15314 /* If we have more than one element left in the repeat count,
15315 and we have more than one element left in the target variable,
15316 then create a range assignment. */
15317 /* FIXME: Only done for full arrays for now, since array sections
15319 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15320 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15324 if (mpz_cmp (size
, values
.left
) >= 0)
15326 mpz_init_set (range
, values
.left
);
15327 mpz_sub (size
, size
, values
.left
);
15328 mpz_set_ui (values
.left
, 0);
15332 mpz_init_set (range
, size
);
15333 mpz_sub (values
.left
, values
.left
, size
);
15334 mpz_set_ui (size
, 0);
15337 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15340 mpz_add (offset
, offset
, range
);
15347 /* Assign initial value to symbol. */
15350 mpz_sub_ui (values
.left
, values
.left
, 1);
15351 mpz_sub_ui (size
, size
, 1);
15353 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15358 if (mark
== AR_FULL
)
15359 mpz_add_ui (offset
, offset
, 1);
15361 /* Modify the array section indexes and recalculate the offset
15362 for next element. */
15363 else if (mark
== AR_SECTION
)
15364 gfc_advance_section (section_index
, ar
, &offset
);
15368 if (mark
== AR_SECTION
)
15370 for (i
= 0; i
< ar
->dimen
; i
++)
15371 mpz_clear (section_index
[i
]);
15375 mpz_clear (offset
);
15381 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15383 /* Iterate over a list of elements in a DATA statement. */
15386 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15389 iterator_stack frame
;
15390 gfc_expr
*e
, *start
, *end
, *step
;
15391 bool retval
= true;
15393 mpz_init (frame
.value
);
15396 start
= gfc_copy_expr (var
->iter
.start
);
15397 end
= gfc_copy_expr (var
->iter
.end
);
15398 step
= gfc_copy_expr (var
->iter
.step
);
15400 if (!gfc_simplify_expr (start
, 1)
15401 || start
->expr_type
!= EXPR_CONSTANT
)
15403 gfc_error ("start of implied-do loop at %L could not be "
15404 "simplified to a constant value", &start
->where
);
15408 if (!gfc_simplify_expr (end
, 1)
15409 || end
->expr_type
!= EXPR_CONSTANT
)
15411 gfc_error ("end of implied-do loop at %L could not be "
15412 "simplified to a constant value", &start
->where
);
15416 if (!gfc_simplify_expr (step
, 1)
15417 || step
->expr_type
!= EXPR_CONSTANT
)
15419 gfc_error ("step of implied-do loop at %L could not be "
15420 "simplified to a constant value", &start
->where
);
15425 mpz_set (trip
, end
->value
.integer
);
15426 mpz_sub (trip
, trip
, start
->value
.integer
);
15427 mpz_add (trip
, trip
, step
->value
.integer
);
15429 mpz_div (trip
, trip
, step
->value
.integer
);
15431 mpz_set (frame
.value
, start
->value
.integer
);
15433 frame
.prev
= iter_stack
;
15434 frame
.variable
= var
->iter
.var
->symtree
;
15435 iter_stack
= &frame
;
15437 while (mpz_cmp_ui (trip
, 0) > 0)
15439 if (!traverse_data_var (var
->list
, where
))
15445 e
= gfc_copy_expr (var
->expr
);
15446 if (!gfc_simplify_expr (e
, 1))
15453 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15455 mpz_sub_ui (trip
, trip
, 1);
15459 mpz_clear (frame
.value
);
15462 gfc_free_expr (start
);
15463 gfc_free_expr (end
);
15464 gfc_free_expr (step
);
15466 iter_stack
= frame
.prev
;
15471 /* Type resolve variables in the variable list of a DATA statement. */
15474 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15478 for (; var
; var
= var
->next
)
15480 if (var
->expr
== NULL
)
15481 t
= traverse_data_list (var
, where
);
15483 t
= check_data_variable (var
, where
);
15493 /* Resolve the expressions and iterators associated with a data statement.
15494 This is separate from the assignment checking because data lists should
15495 only be resolved once. */
15498 resolve_data_variables (gfc_data_variable
*d
)
15500 for (; d
; d
= d
->next
)
15502 if (d
->list
== NULL
)
15504 if (!gfc_resolve_expr (d
->expr
))
15509 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15512 if (!resolve_data_variables (d
->list
))
15521 /* Resolve a single DATA statement. We implement this by storing a pointer to
15522 the value list into static variables, and then recursively traversing the
15523 variables list, expanding iterators and such. */
15526 resolve_data (gfc_data
*d
)
15529 if (!resolve_data_variables (d
->var
))
15532 values
.vnode
= d
->value
;
15533 if (d
->value
== NULL
)
15534 mpz_set_ui (values
.left
, 0);
15536 mpz_set (values
.left
, d
->value
->repeat
);
15538 if (!traverse_data_var (d
->var
, &d
->where
))
15541 /* At this point, we better not have any values left. */
15543 if (next_data_value ())
15544 gfc_error ("DATA statement at %L has more values than variables",
15549 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15550 accessed by host or use association, is a dummy argument to a pure function,
15551 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15552 is storage associated with any such variable, shall not be used in the
15553 following contexts: (clients of this function). */
15555 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15556 procedure. Returns zero if assignment is OK, nonzero if there is a
15559 gfc_impure_variable (gfc_symbol
*sym
)
15564 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15567 /* Check if the symbol's ns is inside the pure procedure. */
15568 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15572 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15576 proc
= sym
->ns
->proc_name
;
15577 if (sym
->attr
.dummy
15578 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15579 || proc
->attr
.function
))
15582 /* TODO: Sort out what can be storage associated, if anything, and include
15583 it here. In principle equivalences should be scanned but it does not
15584 seem to be possible to storage associate an impure variable this way. */
15589 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15590 current namespace is inside a pure procedure. */
15593 gfc_pure (gfc_symbol
*sym
)
15595 symbol_attribute attr
;
15600 /* Check if the current namespace or one of its parents
15601 belongs to a pure procedure. */
15602 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15604 sym
= ns
->proc_name
;
15608 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15616 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15620 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15621 checks if the current namespace is implicitly pure. Note that this
15622 function returns false for a PURE procedure. */
15625 gfc_implicit_pure (gfc_symbol
*sym
)
15631 /* Check if the current procedure is implicit_pure. Walk up
15632 the procedure list until we find a procedure. */
15633 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15635 sym
= ns
->proc_name
;
15639 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15644 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15645 && !sym
->attr
.pure
;
15650 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15656 /* Check if the current procedure is implicit_pure. Walk up
15657 the procedure list until we find a procedure. */
15658 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15660 sym
= ns
->proc_name
;
15664 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15669 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15670 sym
->attr
.implicit_pure
= 0;
15672 sym
->attr
.pure
= 0;
15676 /* Test whether the current procedure is elemental or not. */
15679 gfc_elemental (gfc_symbol
*sym
)
15681 symbol_attribute attr
;
15684 sym
= gfc_current_ns
->proc_name
;
15689 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15693 /* Warn about unused labels. */
15696 warn_unused_fortran_label (gfc_st_label
*label
)
15701 warn_unused_fortran_label (label
->left
);
15703 if (label
->defined
== ST_LABEL_UNKNOWN
)
15706 switch (label
->referenced
)
15708 case ST_LABEL_UNKNOWN
:
15709 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15710 label
->value
, &label
->where
);
15713 case ST_LABEL_BAD_TARGET
:
15714 gfc_warning (OPT_Wunused_label
,
15715 "Label %d at %L defined but cannot be used",
15716 label
->value
, &label
->where
);
15723 warn_unused_fortran_label (label
->right
);
15727 /* Returns the sequence type of a symbol or sequence. */
15730 sequence_type (gfc_typespec ts
)
15739 if (ts
.u
.derived
->components
== NULL
)
15740 return SEQ_NONDEFAULT
;
15742 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15743 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15744 if (sequence_type (c
->ts
) != result
)
15750 if (ts
.kind
!= gfc_default_character_kind
)
15751 return SEQ_NONDEFAULT
;
15753 return SEQ_CHARACTER
;
15756 if (ts
.kind
!= gfc_default_integer_kind
)
15757 return SEQ_NONDEFAULT
;
15759 return SEQ_NUMERIC
;
15762 if (!(ts
.kind
== gfc_default_real_kind
15763 || ts
.kind
== gfc_default_double_kind
))
15764 return SEQ_NONDEFAULT
;
15766 return SEQ_NUMERIC
;
15769 if (ts
.kind
!= gfc_default_complex_kind
)
15770 return SEQ_NONDEFAULT
;
15772 return SEQ_NUMERIC
;
15775 if (ts
.kind
!= gfc_default_logical_kind
)
15776 return SEQ_NONDEFAULT
;
15778 return SEQ_NUMERIC
;
15781 return SEQ_NONDEFAULT
;
15786 /* Resolve derived type EQUIVALENCE object. */
15789 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15791 gfc_component
*c
= derived
->components
;
15796 /* Shall not be an object of nonsequence derived type. */
15797 if (!derived
->attr
.sequence
)
15799 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15800 "attribute to be an EQUIVALENCE object", sym
->name
,
15805 /* Shall not have allocatable components. */
15806 if (derived
->attr
.alloc_comp
)
15808 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15809 "components to be an EQUIVALENCE object",sym
->name
,
15814 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15816 gfc_error ("Derived type variable %qs at %L with default "
15817 "initialization cannot be in EQUIVALENCE with a variable "
15818 "in COMMON", sym
->name
, &e
->where
);
15822 for (; c
; c
= c
->next
)
15824 if (gfc_bt_struct (c
->ts
.type
)
15825 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15828 /* Shall not be an object of sequence derived type containing a pointer
15829 in the structure. */
15830 if (c
->attr
.pointer
)
15832 gfc_error ("Derived type variable %qs at %L with pointer "
15833 "component(s) cannot be an EQUIVALENCE object",
15834 sym
->name
, &e
->where
);
15842 /* Resolve equivalence object.
15843 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15844 an allocatable array, an object of nonsequence derived type, an object of
15845 sequence derived type containing a pointer at any level of component
15846 selection, an automatic object, a function name, an entry name, a result
15847 name, a named constant, a structure component, or a subobject of any of
15848 the preceding objects. A substring shall not have length zero. A
15849 derived type shall not have components with default initialization nor
15850 shall two objects of an equivalence group be initialized.
15851 Either all or none of the objects shall have an protected attribute.
15852 The simple constraints are done in symbol.c(check_conflict) and the rest
15853 are implemented here. */
15856 resolve_equivalence (gfc_equiv
*eq
)
15859 gfc_symbol
*first_sym
;
15862 locus
*last_where
= NULL
;
15863 seq_type eq_type
, last_eq_type
;
15864 gfc_typespec
*last_ts
;
15865 int object
, cnt_protected
;
15868 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15870 first_sym
= eq
->expr
->symtree
->n
.sym
;
15874 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
15878 e
->ts
= e
->symtree
->n
.sym
->ts
;
15879 /* match_varspec might not know yet if it is seeing
15880 array reference or substring reference, as it doesn't
15882 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
15884 gfc_ref
*ref
= e
->ref
;
15885 sym
= e
->symtree
->n
.sym
;
15887 if (sym
->attr
.dimension
)
15889 ref
->u
.ar
.as
= sym
->as
;
15893 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
15894 if (e
->ts
.type
== BT_CHARACTER
15896 && ref
->type
== REF_ARRAY
15897 && ref
->u
.ar
.dimen
== 1
15898 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
15899 && ref
->u
.ar
.stride
[0] == NULL
)
15901 gfc_expr
*start
= ref
->u
.ar
.start
[0];
15902 gfc_expr
*end
= ref
->u
.ar
.end
[0];
15905 /* Optimize away the (:) reference. */
15906 if (start
== NULL
&& end
== NULL
)
15909 e
->ref
= ref
->next
;
15911 e
->ref
->next
= ref
->next
;
15916 ref
->type
= REF_SUBSTRING
;
15918 start
= gfc_get_int_expr (gfc_default_integer_kind
,
15920 ref
->u
.ss
.start
= start
;
15921 if (end
== NULL
&& e
->ts
.u
.cl
)
15922 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
15923 ref
->u
.ss
.end
= end
;
15924 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
15931 /* Any further ref is an error. */
15934 gcc_assert (ref
->type
== REF_ARRAY
);
15935 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
15941 if (!gfc_resolve_expr (e
))
15944 sym
= e
->symtree
->n
.sym
;
15946 if (sym
->attr
.is_protected
)
15948 if (cnt_protected
> 0 && cnt_protected
!= object
)
15950 gfc_error ("Either all or none of the objects in the "
15951 "EQUIVALENCE set at %L shall have the "
15952 "PROTECTED attribute",
15957 /* Shall not equivalence common block variables in a PURE procedure. */
15958 if (sym
->ns
->proc_name
15959 && sym
->ns
->proc_name
->attr
.pure
15960 && sym
->attr
.in_common
)
15962 /* Need to check for symbols that may have entered the pure
15963 procedure via a USE statement. */
15964 bool saw_sym
= false;
15965 if (sym
->ns
->use_stmts
)
15968 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
15969 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
15975 gfc_error ("COMMON block member %qs at %L cannot be an "
15976 "EQUIVALENCE object in the pure procedure %qs",
15977 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
15981 /* Shall not be a named constant. */
15982 if (e
->expr_type
== EXPR_CONSTANT
)
15984 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
15985 "object", sym
->name
, &e
->where
);
15989 if (e
->ts
.type
== BT_DERIVED
15990 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
15993 /* Check that the types correspond correctly:
15995 A numeric sequence structure may be equivalenced to another sequence
15996 structure, an object of default integer type, default real type, double
15997 precision real type, default logical type such that components of the
15998 structure ultimately only become associated to objects of the same
15999 kind. A character sequence structure may be equivalenced to an object
16000 of default character kind or another character sequence structure.
16001 Other objects may be equivalenced only to objects of the same type and
16002 kind parameters. */
16004 /* Identical types are unconditionally OK. */
16005 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16006 goto identical_types
;
16008 last_eq_type
= sequence_type (*last_ts
);
16009 eq_type
= sequence_type (sym
->ts
);
16011 /* Since the pair of objects is not of the same type, mixed or
16012 non-default sequences can be rejected. */
16014 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16015 "statement at %L with different type objects";
16017 && last_eq_type
== SEQ_MIXED
16018 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16019 || (eq_type
== SEQ_MIXED
16020 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16023 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16024 "statement at %L with objects of different type";
16026 && last_eq_type
== SEQ_NONDEFAULT
16027 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16028 || (eq_type
== SEQ_NONDEFAULT
16029 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16032 msg
="Non-CHARACTER object %qs in default CHARACTER "
16033 "EQUIVALENCE statement at %L";
16034 if (last_eq_type
== SEQ_CHARACTER
16035 && eq_type
!= SEQ_CHARACTER
16036 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16039 msg
="Non-NUMERIC object %qs in default NUMERIC "
16040 "EQUIVALENCE statement at %L";
16041 if (last_eq_type
== SEQ_NUMERIC
16042 && eq_type
!= SEQ_NUMERIC
16043 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16048 last_where
= &e
->where
;
16053 /* Shall not be an automatic array. */
16054 if (e
->ref
->type
== REF_ARRAY
16055 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16057 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16058 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16065 /* Shall not be a structure component. */
16066 if (r
->type
== REF_COMPONENT
)
16068 gfc_error ("Structure component %qs at %L cannot be an "
16069 "EQUIVALENCE object",
16070 r
->u
.c
.component
->name
, &e
->where
);
16074 /* A substring shall not have length zero. */
16075 if (r
->type
== REF_SUBSTRING
)
16077 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16079 gfc_error ("Substring at %L has length zero",
16080 &r
->u
.ss
.start
->where
);
16090 /* Function called by resolve_fntype to flag other symbol used in the
16091 length type parameter specification of function resuls. */
16094 flag_fn_result_spec (gfc_expr
*expr
,
16095 gfc_symbol
*sym ATTRIBUTE_UNUSED
,
16096 int *f ATTRIBUTE_UNUSED
)
16101 if (expr
->expr_type
== EXPR_VARIABLE
)
16103 s
= expr
->symtree
->n
.sym
;
16104 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16108 if (!s
->fn_result_spec
16109 && s
->attr
.flavor
== FL_PARAMETER
)
16111 /* Function contained in a module.... */
16112 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16115 s
->fn_result_spec
= 1;
16116 /* Make sure that this symbol is translated as a module
16118 st
= gfc_get_unique_symtree (ns
);
16122 /* ... which is use associated and called. */
16123 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16125 /* External function matched with an interface. */
16128 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16129 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16130 && s
->ns
->proc_name
->attr
.function
))
16131 s
->fn_result_spec
= 1;
16138 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16141 resolve_fntype (gfc_namespace
*ns
)
16143 gfc_entry_list
*el
;
16146 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16149 /* If there are any entries, ns->proc_name is the entry master
16150 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16152 sym
= ns
->entries
->sym
;
16154 sym
= ns
->proc_name
;
16155 if (sym
->result
== sym
16156 && sym
->ts
.type
== BT_UNKNOWN
16157 && !gfc_set_default_type (sym
, 0, NULL
)
16158 && !sym
->attr
.untyped
)
16160 gfc_error ("Function %qs at %L has no IMPLICIT type",
16161 sym
->name
, &sym
->declared_at
);
16162 sym
->attr
.untyped
= 1;
16165 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16166 && !sym
->attr
.contained
16167 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16168 && gfc_check_symbol_access (sym
))
16170 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16171 "%L of PRIVATE type %qs", sym
->name
,
16172 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16176 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16178 if (el
->sym
->result
== el
->sym
16179 && el
->sym
->ts
.type
== BT_UNKNOWN
16180 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16181 && !el
->sym
->attr
.untyped
)
16183 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16184 el
->sym
->name
, &el
->sym
->declared_at
);
16185 el
->sym
->attr
.untyped
= 1;
16189 if (sym
->ts
.type
== BT_CHARACTER
)
16190 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, NULL
, flag_fn_result_spec
, 0);
16194 /* 12.3.2.1.1 Defined operators. */
16197 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16199 gfc_formal_arglist
*formal
;
16201 if (!sym
->attr
.function
)
16203 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16204 sym
->name
, &where
);
16208 if (sym
->ts
.type
== BT_CHARACTER
16209 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16210 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16211 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16213 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16214 "character length", sym
->name
, &where
);
16218 formal
= gfc_sym_get_dummy_args (sym
);
16219 if (!formal
|| !formal
->sym
)
16221 gfc_error ("User operator procedure %qs at %L must have at least "
16222 "one argument", sym
->name
, &where
);
16226 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16228 gfc_error ("First argument of operator interface at %L must be "
16229 "INTENT(IN)", &where
);
16233 if (formal
->sym
->attr
.optional
)
16235 gfc_error ("First argument of operator interface at %L cannot be "
16236 "optional", &where
);
16240 formal
= formal
->next
;
16241 if (!formal
|| !formal
->sym
)
16244 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16246 gfc_error ("Second argument of operator interface at %L must be "
16247 "INTENT(IN)", &where
);
16251 if (formal
->sym
->attr
.optional
)
16253 gfc_error ("Second argument of operator interface at %L cannot be "
16254 "optional", &where
);
16260 gfc_error ("Operator interface at %L must have, at most, two "
16261 "arguments", &where
);
16269 gfc_resolve_uops (gfc_symtree
*symtree
)
16271 gfc_interface
*itr
;
16273 if (symtree
== NULL
)
16276 gfc_resolve_uops (symtree
->left
);
16277 gfc_resolve_uops (symtree
->right
);
16279 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16280 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16284 /* Examine all of the expressions associated with a program unit,
16285 assign types to all intermediate expressions, make sure that all
16286 assignments are to compatible types and figure out which names
16287 refer to which functions or subroutines. It doesn't check code
16288 block, which is handled by gfc_resolve_code. */
16291 resolve_types (gfc_namespace
*ns
)
16297 gfc_namespace
* old_ns
= gfc_current_ns
;
16299 if (ns
->types_resolved
)
16302 /* Check that all IMPLICIT types are ok. */
16303 if (!ns
->seen_implicit_none
)
16306 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16307 if (ns
->set_flag
[letter
]
16308 && !resolve_typespec_used (&ns
->default_type
[letter
],
16309 &ns
->implicit_loc
[letter
], NULL
))
16313 gfc_current_ns
= ns
;
16315 resolve_entries (ns
);
16317 resolve_common_vars (&ns
->blank_common
, false);
16318 resolve_common_blocks (ns
->common_root
);
16320 resolve_contained_functions (ns
);
16322 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16323 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16324 resolve_formal_arglist (ns
->proc_name
);
16326 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16328 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16329 resolve_charlen (cl
);
16331 gfc_traverse_ns (ns
, resolve_symbol
);
16333 resolve_fntype (ns
);
16335 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16337 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16338 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16339 "also be PURE", n
->proc_name
->name
,
16340 &n
->proc_name
->declared_at
);
16346 gfc_do_concurrent_flag
= 0;
16347 gfc_check_interfaces (ns
);
16349 gfc_traverse_ns (ns
, resolve_values
);
16355 for (d
= ns
->data
; d
; d
= d
->next
)
16359 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16361 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16363 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16364 resolve_equivalence (eq
);
16366 /* Warn about unused labels. */
16367 if (warn_unused_label
)
16368 warn_unused_fortran_label (ns
->st_labels
);
16370 gfc_resolve_uops (ns
->uop_root
);
16372 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16374 gfc_resolve_omp_declare_simd (ns
);
16376 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16378 ns
->types_resolved
= 1;
16380 gfc_current_ns
= old_ns
;
16384 /* Call gfc_resolve_code recursively. */
16387 resolve_codes (gfc_namespace
*ns
)
16390 bitmap_obstack old_obstack
;
16392 if (ns
->resolved
== 1)
16395 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16398 gfc_current_ns
= ns
;
16400 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16401 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16404 /* Set to an out of range value. */
16405 current_entry_id
= -1;
16407 old_obstack
= labels_obstack
;
16408 bitmap_obstack_initialize (&labels_obstack
);
16410 gfc_resolve_oacc_declare (ns
);
16411 gfc_resolve_omp_local_vars (ns
);
16412 gfc_resolve_code (ns
->code
, ns
);
16414 bitmap_obstack_release (&labels_obstack
);
16415 labels_obstack
= old_obstack
;
16419 /* This function is called after a complete program unit has been compiled.
16420 Its purpose is to examine all of the expressions associated with a program
16421 unit, assign types to all intermediate expressions, make sure that all
16422 assignments are to compatible types and figure out which names refer to
16423 which functions or subroutines. */
16426 gfc_resolve (gfc_namespace
*ns
)
16428 gfc_namespace
*old_ns
;
16429 code_stack
*old_cs_base
;
16430 struct gfc_omp_saved_state old_omp_state
;
16436 old_ns
= gfc_current_ns
;
16437 old_cs_base
= cs_base
;
16439 /* As gfc_resolve can be called during resolution of an OpenMP construct
16440 body, we should clear any state associated to it, so that say NS's
16441 DO loops are not interpreted as OpenMP loops. */
16442 if (!ns
->construct_entities
)
16443 gfc_omp_save_and_clear_state (&old_omp_state
);
16445 resolve_types (ns
);
16446 component_assignment_level
= 0;
16447 resolve_codes (ns
);
16449 gfc_current_ns
= old_ns
;
16450 cs_base
= old_cs_base
;
16453 gfc_run_passes (ns
);
16455 if (!ns
->construct_entities
)
16456 gfc_omp_restore_state (&old_omp_state
);