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 ("Character-valued %s %qs at %L must not be"
620 module_proc
? _("module procedure")
621 : _("internal function"),
622 sym
->name
, &sym
->declared_at
);
628 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
629 introduce duplicates. */
632 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
634 gfc_formal_arglist
*f
, *new_arglist
;
637 for (; new_args
!= NULL
; new_args
= new_args
->next
)
639 new_sym
= new_args
->sym
;
640 /* See if this arg is already in the formal argument list. */
641 for (f
= proc
->formal
; f
; f
= f
->next
)
643 if (new_sym
== f
->sym
)
650 /* Add a new argument. Argument order is not important. */
651 new_arglist
= gfc_get_formal_arglist ();
652 new_arglist
->sym
= new_sym
;
653 new_arglist
->next
= proc
->formal
;
654 proc
->formal
= new_arglist
;
659 /* Flag the arguments that are not present in all entries. */
662 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
664 gfc_formal_arglist
*f
, *head
;
667 for (f
= proc
->formal
; f
; f
= f
->next
)
672 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
674 if (new_args
->sym
== f
->sym
)
681 f
->sym
->attr
.not_always_present
= 1;
686 /* Resolve alternate entry points. If a symbol has multiple entry points we
687 create a new master symbol for the main routine, and turn the existing
688 symbol into an entry point. */
691 resolve_entries (gfc_namespace
*ns
)
693 gfc_namespace
*old_ns
;
697 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
698 static int master_count
= 0;
700 if (ns
->proc_name
== NULL
)
703 /* No need to do anything if this procedure doesn't have alternate entry
708 /* We may already have resolved alternate entry points. */
709 if (ns
->proc_name
->attr
.entry_master
)
712 /* If this isn't a procedure something has gone horribly wrong. */
713 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
715 /* Remember the current namespace. */
716 old_ns
= gfc_current_ns
;
720 /* Add the main entry point to the list of entry points. */
721 el
= gfc_get_entry_list ();
722 el
->sym
= ns
->proc_name
;
724 el
->next
= ns
->entries
;
726 ns
->proc_name
->attr
.entry
= 1;
728 /* If it is a module function, it needs to be in the right namespace
729 so that gfc_get_fake_result_decl can gather up the results. The
730 need for this arose in get_proc_name, where these beasts were
731 left in their own namespace, to keep prior references linked to
732 the entry declaration.*/
733 if (ns
->proc_name
->attr
.function
734 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
737 /* Do the same for entries where the master is not a module
738 procedure. These are retained in the module namespace because
739 of the module procedure declaration. */
740 for (el
= el
->next
; el
; el
= el
->next
)
741 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
742 && el
->sym
->attr
.mod_proc
)
746 /* Add an entry statement for it. */
747 c
= gfc_get_code (EXEC_ENTRY
);
752 /* Create a new symbol for the master function. */
753 /* Give the internal function a unique name (within this file).
754 Also include the function name so the user has some hope of figuring
755 out what is going on. */
756 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
757 master_count
++, ns
->proc_name
->name
);
758 gfc_get_ha_symbol (name
, &proc
);
759 gcc_assert (proc
!= NULL
);
761 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
762 if (ns
->proc_name
->attr
.subroutine
)
763 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
767 gfc_typespec
*ts
, *fts
;
768 gfc_array_spec
*as
, *fas
;
769 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
771 fas
= ns
->entries
->sym
->as
;
772 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
773 fts
= &ns
->entries
->sym
->result
->ts
;
774 if (fts
->type
== BT_UNKNOWN
)
775 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
776 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
778 ts
= &el
->sym
->result
->ts
;
780 as
= as
? as
: el
->sym
->result
->as
;
781 if (ts
->type
== BT_UNKNOWN
)
782 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
784 if (! gfc_compare_types (ts
, fts
)
785 || (el
->sym
->result
->attr
.dimension
786 != ns
->entries
->sym
->result
->attr
.dimension
)
787 || (el
->sym
->result
->attr
.pointer
788 != ns
->entries
->sym
->result
->attr
.pointer
))
790 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
791 && gfc_compare_array_spec (as
, fas
) == 0)
792 gfc_error ("Function %s at %L has entries with mismatched "
793 "array specifications", ns
->entries
->sym
->name
,
794 &ns
->entries
->sym
->declared_at
);
795 /* The characteristics need to match and thus both need to have
796 the same string length, i.e. both len=*, or both len=4.
797 Having both len=<variable> is also possible, but difficult to
798 check at compile time. */
799 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
800 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
801 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
803 && ts
->u
.cl
->length
->expr_type
804 != fts
->u
.cl
->length
->expr_type
)
806 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
807 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
808 fts
->u
.cl
->length
->value
.integer
) != 0)))
809 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
810 "entries returning variables of different "
811 "string lengths", ns
->entries
->sym
->name
,
812 &ns
->entries
->sym
->declared_at
);
817 sym
= ns
->entries
->sym
->result
;
818 /* All result types the same. */
820 if (sym
->attr
.dimension
)
821 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
822 if (sym
->attr
.pointer
)
823 gfc_add_pointer (&proc
->attr
, NULL
);
827 /* Otherwise the result will be passed through a union by
829 proc
->attr
.mixed_entry_master
= 1;
830 for (el
= ns
->entries
; el
; el
= el
->next
)
832 sym
= el
->sym
->result
;
833 if (sym
->attr
.dimension
)
835 if (el
== ns
->entries
)
836 gfc_error ("FUNCTION result %s can't be an array in "
837 "FUNCTION %s at %L", sym
->name
,
838 ns
->entries
->sym
->name
, &sym
->declared_at
);
840 gfc_error ("ENTRY result %s can't be an array in "
841 "FUNCTION %s at %L", sym
->name
,
842 ns
->entries
->sym
->name
, &sym
->declared_at
);
844 else if (sym
->attr
.pointer
)
846 if (el
== ns
->entries
)
847 gfc_error ("FUNCTION result %s can't be a POINTER in "
848 "FUNCTION %s at %L", sym
->name
,
849 ns
->entries
->sym
->name
, &sym
->declared_at
);
851 gfc_error ("ENTRY result %s can't be a POINTER in "
852 "FUNCTION %s at %L", sym
->name
,
853 ns
->entries
->sym
->name
, &sym
->declared_at
);
858 if (ts
->type
== BT_UNKNOWN
)
859 ts
= gfc_get_default_type (sym
->name
, NULL
);
863 if (ts
->kind
== gfc_default_integer_kind
)
867 if (ts
->kind
== gfc_default_real_kind
868 || ts
->kind
== gfc_default_double_kind
)
872 if (ts
->kind
== gfc_default_complex_kind
)
876 if (ts
->kind
== gfc_default_logical_kind
)
880 /* We will issue error elsewhere. */
888 if (el
== ns
->entries
)
889 gfc_error ("FUNCTION result %s can't be of type %s "
890 "in FUNCTION %s at %L", sym
->name
,
891 gfc_typename (ts
), ns
->entries
->sym
->name
,
894 gfc_error ("ENTRY result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
903 proc
->attr
.access
= ACCESS_PRIVATE
;
904 proc
->attr
.entry_master
= 1;
906 /* Merge all the entry point arguments. */
907 for (el
= ns
->entries
; el
; el
= el
->next
)
908 merge_argument_lists (proc
, el
->sym
->formal
);
910 /* Check the master formal arguments for any that are not
911 present in all entry points. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 check_argument_lists (proc
, el
->sym
->formal
);
915 /* Use the master function for the function body. */
916 ns
->proc_name
= proc
;
918 /* Finalize the new symbols. */
919 gfc_commit_symbols ();
921 /* Restore the original namespace. */
922 gfc_current_ns
= old_ns
;
926 /* Resolve common variables. */
928 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
930 gfc_symbol
*csym
= common_block
->head
;
932 for (; csym
; csym
= csym
->common_next
)
934 /* gfc_add_in_common may have been called before, but the reported errors
935 have been ignored to continue parsing.
936 We do the checks again here. */
937 if (!csym
->attr
.use_assoc
)
938 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
940 if (csym
->value
|| csym
->attr
.data
)
942 if (!csym
->ns
->is_block_data
)
943 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
944 "but only in BLOCK DATA initialization is "
945 "allowed", csym
->name
, &csym
->declared_at
);
946 else if (!named_common
)
947 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
948 "in a blank COMMON but initialization is only "
949 "allowed in named common blocks", csym
->name
,
953 if (UNLIMITED_POLY (csym
))
954 gfc_error_now ("%qs in cannot appear in COMMON at %L "
955 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
957 if (csym
->ts
.type
!= BT_DERIVED
)
960 if (!(csym
->ts
.u
.derived
->attr
.sequence
961 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
962 gfc_error_now ("Derived type variable %qs in COMMON at %L "
963 "has neither the SEQUENCE nor the BIND(C) "
964 "attribute", csym
->name
, &csym
->declared_at
);
965 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
966 gfc_error_now ("Derived type variable %qs in COMMON at %L "
967 "has an ultimate component that is "
968 "allocatable", csym
->name
, &csym
->declared_at
);
969 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
970 gfc_error_now ("Derived type variable %qs in COMMON at %L "
971 "may not have default initializer", csym
->name
,
974 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
975 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
979 /* Resolve common blocks. */
981 resolve_common_blocks (gfc_symtree
*common_root
)
986 if (common_root
== NULL
)
989 if (common_root
->left
)
990 resolve_common_blocks (common_root
->left
);
991 if (common_root
->right
)
992 resolve_common_blocks (common_root
->right
);
994 resolve_common_vars (common_root
->n
.common
, true);
996 /* The common name is a global name - in Fortran 2003 also if it has a
997 C binding name, since Fortran 2008 only the C binding name is a global
999 if (!common_root
->n
.common
->binding_label
1000 || gfc_notification_std (GFC_STD_F2008
))
1002 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1003 common_root
->n
.common
->name
);
1005 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1006 && gsym
->type
== GSYM_COMMON
1007 && ((common_root
->n
.common
->binding_label
1008 && (!gsym
->binding_label
1009 || strcmp (common_root
->n
.common
->binding_label
,
1010 gsym
->binding_label
) != 0))
1011 || (!common_root
->n
.common
->binding_label
1012 && gsym
->binding_label
)))
1014 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1015 "identifier and must thus have the same binding name "
1016 "as the same-named COMMON block at %L: %s vs %s",
1017 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1019 common_root
->n
.common
->binding_label
1020 ? common_root
->n
.common
->binding_label
: "(blank)",
1021 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1025 if (gsym
&& gsym
->type
!= GSYM_COMMON
1026 && !common_root
->n
.common
->binding_label
)
1028 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1030 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1036 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1037 "%L sharing the identifier with global non-COMMON-block "
1038 "entity at %L", common_root
->n
.common
->name
,
1039 &common_root
->n
.common
->where
, &gsym
->where
);
1044 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1045 gsym
->type
= GSYM_COMMON
;
1046 gsym
->where
= common_root
->n
.common
->where
;
1052 if (common_root
->n
.common
->binding_label
)
1054 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1055 common_root
->n
.common
->binding_label
);
1056 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1058 gfc_error ("COMMON block at %L with binding label %s uses the same "
1059 "global identifier as entity at %L",
1060 &common_root
->n
.common
->where
,
1061 common_root
->n
.common
->binding_label
, &gsym
->where
);
1066 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1067 gsym
->type
= GSYM_COMMON
;
1068 gsym
->where
= common_root
->n
.common
->where
;
1074 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1078 if (sym
->attr
.flavor
== FL_PARAMETER
)
1079 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1080 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1082 if (sym
->attr
.external
)
1083 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1084 sym
->name
, &common_root
->n
.common
->where
);
1086 if (sym
->attr
.intrinsic
)
1087 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1088 sym
->name
, &common_root
->n
.common
->where
);
1089 else if (sym
->attr
.result
1090 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1091 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1092 "that is also a function result", sym
->name
,
1093 &common_root
->n
.common
->where
);
1094 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1095 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1096 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1097 "that is also a global procedure", sym
->name
,
1098 &common_root
->n
.common
->where
);
1102 /* Resolve contained function types. Because contained functions can call one
1103 another, they have to be worked out before any of the contained procedures
1106 The good news is that if a function doesn't already have a type, the only
1107 way it can get one is through an IMPLICIT type or a RESULT variable, because
1108 by definition contained functions are contained namespace they're contained
1109 in, not in a sibling or parent namespace. */
1112 resolve_contained_functions (gfc_namespace
*ns
)
1114 gfc_namespace
*child
;
1117 resolve_formal_arglists (ns
);
1119 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1121 /* Resolve alternate entry points first. */
1122 resolve_entries (child
);
1124 /* Then check function return types. */
1125 resolve_contained_fntype (child
->proc_name
, child
);
1126 for (el
= child
->entries
; el
; el
= el
->next
)
1127 resolve_contained_fntype (el
->sym
, child
);
1132 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1133 static bool resolve_fl_struct (gfc_symbol
*sym
);
1136 /* Resolve all of the elements of a structure constructor and make sure that
1137 the types are correct. The 'init' flag indicates that the given
1138 constructor is an initializer. */
1141 resolve_structure_cons (gfc_expr
*expr
, int init
)
1143 gfc_constructor
*cons
;
1144 gfc_component
*comp
;
1150 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1152 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1153 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1155 resolve_fl_struct (expr
->ts
.u
.derived
);
1158 cons
= gfc_constructor_first (expr
->value
.constructor
);
1160 /* A constructor may have references if it is the result of substituting a
1161 parameter variable. In this case we just pull out the component we
1164 comp
= expr
->ref
->u
.c
.sym
->components
;
1166 comp
= expr
->ts
.u
.derived
->components
;
1168 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1175 /* Unions use an EXPR_NULL contrived expression to tell the translation
1176 phase to generate an initializer of the appropriate length.
1178 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1181 if (!gfc_resolve_expr (cons
->expr
))
1187 rank
= comp
->as
? comp
->as
->rank
: 0;
1188 if (comp
->ts
.type
== BT_CLASS
&& CLASS_DATA (comp
)->as
)
1189 rank
= CLASS_DATA (comp
)->as
->rank
;
1191 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1192 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1194 gfc_error ("The rank of the element in the structure "
1195 "constructor at %L does not match that of the "
1196 "component (%d/%d)", &cons
->expr
->where
,
1197 cons
->expr
->rank
, rank
);
1201 /* If we don't have the right type, try to convert it. */
1203 if (!comp
->attr
.proc_pointer
&&
1204 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1206 if (strcmp (comp
->name
, "_extends") == 0)
1208 /* Can afford to be brutal with the _extends initializer.
1209 The derived type can get lost because it is PRIVATE
1210 but it is not usage constrained by the standard. */
1211 cons
->expr
->ts
= comp
->ts
;
1213 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1215 gfc_error ("The element in the structure constructor at %L, "
1216 "for pointer component %qs, is %s but should be %s",
1217 &cons
->expr
->where
, comp
->name
,
1218 gfc_basic_typename (cons
->expr
->ts
.type
),
1219 gfc_basic_typename (comp
->ts
.type
));
1224 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1230 /* For strings, the length of the constructor should be the same as
1231 the one of the structure, ensure this if the lengths are known at
1232 compile time and when we are dealing with PARAMETER or structure
1234 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1235 && comp
->ts
.u
.cl
->length
1236 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1237 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1238 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1239 && cons
->expr
->rank
!= 0
1240 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1241 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1243 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1244 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1246 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1247 to make use of the gfc_resolve_character_array_constructor
1248 machinery. The expression is later simplified away to
1249 an array of string literals. */
1250 gfc_expr
*para
= cons
->expr
;
1251 cons
->expr
= gfc_get_expr ();
1252 cons
->expr
->ts
= para
->ts
;
1253 cons
->expr
->where
= para
->where
;
1254 cons
->expr
->expr_type
= EXPR_ARRAY
;
1255 cons
->expr
->rank
= para
->rank
;
1256 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1257 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1258 para
, &cons
->expr
->where
);
1261 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1263 /* Rely on the cleanup of the namespace to deal correctly with
1264 the old charlen. (There was a block here that attempted to
1265 remove the charlen but broke the chain in so doing.) */
1266 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1267 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1268 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1269 gfc_resolve_character_array_constructor (cons
->expr
);
1273 if (cons
->expr
->expr_type
== EXPR_NULL
1274 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1275 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1276 || (comp
->ts
.type
== BT_CLASS
1277 && (CLASS_DATA (comp
)->attr
.class_pointer
1278 || CLASS_DATA (comp
)->attr
.allocatable
))))
1281 gfc_error ("The NULL in the structure constructor at %L is "
1282 "being applied to component %qs, which is neither "
1283 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1287 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1289 /* Check procedure pointer interface. */
1290 gfc_symbol
*s2
= NULL
;
1295 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1298 s2
= c2
->ts
.interface
;
1301 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1303 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1304 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1306 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1308 s2
= cons
->expr
->symtree
->n
.sym
;
1309 name
= cons
->expr
->symtree
->n
.sym
->name
;
1312 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1313 err
, sizeof (err
), NULL
, NULL
))
1315 gfc_error_opt (OPT_Wargument_mismatch
,
1316 "Interface mismatch for procedure-pointer "
1317 "component %qs in structure constructor at %L:"
1318 " %s", comp
->name
, &cons
->expr
->where
, err
);
1323 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1324 || cons
->expr
->expr_type
== EXPR_NULL
)
1327 a
= gfc_expr_attr (cons
->expr
);
1329 if (!a
.pointer
&& !a
.target
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs should be a POINTER or "
1334 "a TARGET", &cons
->expr
->where
, comp
->name
);
1339 /* F08:C461. Additional checks for pointer initialization. */
1343 gfc_error ("Pointer initialization target at %L "
1344 "must not be ALLOCATABLE ", &cons
->expr
->where
);
1349 gfc_error ("Pointer initialization target at %L "
1350 "must have the SAVE attribute", &cons
->expr
->where
);
1354 /* F2003, C1272 (3). */
1355 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1356 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1357 || gfc_is_coindexed (cons
->expr
));
1358 if (impure
&& gfc_pure (NULL
))
1361 gfc_error ("Invalid expression in the structure constructor for "
1362 "pointer component %qs at %L in PURE procedure",
1363 comp
->name
, &cons
->expr
->where
);
1367 gfc_unset_implicit_pure (NULL
);
1374 /****************** Expression name resolution ******************/
1376 /* Returns 0 if a symbol was not declared with a type or
1377 attribute declaration statement, nonzero otherwise. */
1380 was_declared (gfc_symbol
*sym
)
1386 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1389 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1390 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1391 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1392 || a
.asynchronous
|| a
.codimension
)
1399 /* Determine if a symbol is generic or not. */
1402 generic_sym (gfc_symbol
*sym
)
1406 if (sym
->attr
.generic
||
1407 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1410 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1413 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1420 return generic_sym (s
);
1427 /* Determine if a symbol is specific or not. */
1430 specific_sym (gfc_symbol
*sym
)
1434 if (sym
->attr
.if_source
== IFSRC_IFBODY
1435 || sym
->attr
.proc
== PROC_MODULE
1436 || sym
->attr
.proc
== PROC_INTERNAL
1437 || sym
->attr
.proc
== PROC_ST_FUNCTION
1438 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1439 || sym
->attr
.external
)
1442 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1445 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1447 return (s
== NULL
) ? 0 : specific_sym (s
);
1451 /* Figure out if the procedure is specific, generic or unknown. */
1454 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1457 procedure_kind (gfc_symbol
*sym
)
1459 if (generic_sym (sym
))
1460 return PTYPE_GENERIC
;
1462 if (specific_sym (sym
))
1463 return PTYPE_SPECIFIC
;
1465 return PTYPE_UNKNOWN
;
1468 /* Check references to assumed size arrays. The flag need_full_assumed_size
1469 is nonzero when matching actual arguments. */
1471 static int need_full_assumed_size
= 0;
1474 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1476 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1479 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1480 What should it be? */
1481 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1482 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1483 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1485 gfc_error ("The upper bound in the last dimension must "
1486 "appear in the reference to the assumed size "
1487 "array %qs at %L", sym
->name
, &e
->where
);
1494 /* Look for bad assumed size array references in argument expressions
1495 of elemental and array valued intrinsic procedures. Since this is
1496 called from procedure resolution functions, it only recurses at
1500 resolve_assumed_size_actual (gfc_expr
*e
)
1505 switch (e
->expr_type
)
1508 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1513 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1514 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1525 /* Check a generic procedure, passed as an actual argument, to see if
1526 there is a matching specific name. If none, it is an error, and if
1527 more than one, the reference is ambiguous. */
1529 count_specific_procs (gfc_expr
*e
)
1536 sym
= e
->symtree
->n
.sym
;
1538 for (p
= sym
->generic
; p
; p
= p
->next
)
1539 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1541 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1547 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1551 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1552 "argument at %L", sym
->name
, &e
->where
);
1558 /* See if a call to sym could possibly be a not allowed RECURSION because of
1559 a missing RECURSIVE declaration. This means that either sym is the current
1560 context itself, or sym is the parent of a contained procedure calling its
1561 non-RECURSIVE containing procedure.
1562 This also works if sym is an ENTRY. */
1565 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1567 gfc_symbol
* proc_sym
;
1568 gfc_symbol
* context_proc
;
1569 gfc_namespace
* real_context
;
1571 if (sym
->attr
.flavor
== FL_PROGRAM
1572 || gfc_fl_struct (sym
->attr
.flavor
))
1575 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1577 /* If we've got an ENTRY, find real procedure. */
1578 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1579 proc_sym
= sym
->ns
->entries
->sym
;
1583 /* If sym is RECURSIVE, all is well of course. */
1584 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1587 /* Find the context procedure's "real" symbol if it has entries.
1588 We look for a procedure symbol, so recurse on the parents if we don't
1589 find one (like in case of a BLOCK construct). */
1590 for (real_context
= context
; ; real_context
= real_context
->parent
)
1592 /* We should find something, eventually! */
1593 gcc_assert (real_context
);
1595 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1596 : real_context
->proc_name
);
1598 /* In some special cases, there may not be a proc_name, like for this
1600 real(bad_kind()) function foo () ...
1601 when checking the call to bad_kind ().
1602 In these cases, we simply return here and assume that the
1607 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1611 /* A call from sym's body to itself is recursion, of course. */
1612 if (context_proc
== proc_sym
)
1615 /* The same is true if context is a contained procedure and sym the
1617 if (context_proc
->attr
.contained
)
1619 gfc_symbol
* parent_proc
;
1621 gcc_assert (context
->parent
);
1622 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1623 : context
->parent
->proc_name
);
1625 if (parent_proc
== proc_sym
)
1633 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1634 its typespec and formal argument list. */
1637 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1639 gfc_intrinsic_sym
* isym
= NULL
;
1645 /* Already resolved. */
1646 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1649 /* We already know this one is an intrinsic, so we don't call
1650 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1651 gfc_find_subroutine directly to check whether it is a function or
1654 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1656 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1657 isym
= gfc_intrinsic_subroutine_by_id (id
);
1659 else if (sym
->intmod_sym_id
)
1661 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1662 isym
= gfc_intrinsic_function_by_id (id
);
1664 else if (!sym
->attr
.subroutine
)
1665 isym
= gfc_find_function (sym
->name
);
1667 if (isym
&& !sym
->attr
.subroutine
)
1669 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1670 && !sym
->attr
.implicit_type
)
1671 gfc_warning (OPT_Wsurprising
,
1672 "Type specified for intrinsic function %qs at %L is"
1673 " ignored", sym
->name
, &sym
->declared_at
);
1675 if (!sym
->attr
.function
&&
1676 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1681 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1683 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1685 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1686 " specifier", sym
->name
, &sym
->declared_at
);
1690 if (!sym
->attr
.subroutine
&&
1691 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1696 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1701 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1703 sym
->attr
.pure
= isym
->pure
;
1704 sym
->attr
.elemental
= isym
->elemental
;
1706 /* Check it is actually available in the standard settings. */
1707 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1709 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1710 "available in the current standard settings but %s. Use "
1711 "an appropriate %<-std=*%> option or enable "
1712 "%<-fall-intrinsics%> in order to use it.",
1713 sym
->name
, &sym
->declared_at
, symstd
);
1721 /* Resolve a procedure expression, like passing it to a called procedure or as
1722 RHS for a procedure pointer assignment. */
1725 resolve_procedure_expression (gfc_expr
* expr
)
1729 if (expr
->expr_type
!= EXPR_VARIABLE
)
1731 gcc_assert (expr
->symtree
);
1733 sym
= expr
->symtree
->n
.sym
;
1735 if (sym
->attr
.intrinsic
)
1736 gfc_resolve_intrinsic (sym
, &expr
->where
);
1738 if (sym
->attr
.flavor
!= FL_PROCEDURE
1739 || (sym
->attr
.function
&& sym
->result
== sym
))
1742 /* A non-RECURSIVE procedure that is used as procedure expression within its
1743 own body is in danger of being called recursively. */
1744 if (is_illegal_recursion (sym
, gfc_current_ns
))
1745 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1746 " itself recursively. Declare it RECURSIVE or use"
1747 " %<-frecursive%>", sym
->name
, &expr
->where
);
1753 /* Resolve an actual argument list. Most of the time, this is just
1754 resolving the expressions in the list.
1755 The exception is that we sometimes have to decide whether arguments
1756 that look like procedure arguments are really simple variable
1760 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1761 bool no_formal_args
)
1764 gfc_symtree
*parent_st
;
1766 gfc_component
*comp
;
1767 int save_need_full_assumed_size
;
1768 bool return_value
= false;
1769 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1772 first_actual_arg
= true;
1774 for (; arg
; arg
= arg
->next
)
1779 /* Check the label is a valid branching target. */
1782 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1784 gfc_error ("Label %d referenced at %L is never defined",
1785 arg
->label
->value
, &arg
->label
->where
);
1789 first_actual_arg
= false;
1793 if (e
->expr_type
== EXPR_VARIABLE
1794 && e
->symtree
->n
.sym
->attr
.generic
1796 && count_specific_procs (e
) != 1)
1799 if (e
->ts
.type
!= BT_PROCEDURE
)
1801 save_need_full_assumed_size
= need_full_assumed_size
;
1802 if (e
->expr_type
!= EXPR_VARIABLE
)
1803 need_full_assumed_size
= 0;
1804 if (!gfc_resolve_expr (e
))
1806 need_full_assumed_size
= save_need_full_assumed_size
;
1810 /* See if the expression node should really be a variable reference. */
1812 sym
= e
->symtree
->n
.sym
;
1814 if (sym
->attr
.flavor
== FL_PROCEDURE
1815 || sym
->attr
.intrinsic
1816 || sym
->attr
.external
)
1820 /* If a procedure is not already determined to be something else
1821 check if it is intrinsic. */
1822 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1823 sym
->attr
.intrinsic
= 1;
1825 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1827 gfc_error ("Statement function %qs at %L is not allowed as an "
1828 "actual argument", sym
->name
, &e
->where
);
1831 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1832 sym
->attr
.subroutine
);
1833 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1835 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1836 "actual argument", sym
->name
, &e
->where
);
1839 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1840 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1842 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1843 " used as actual argument at %L",
1844 sym
->name
, &e
->where
))
1848 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1850 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1851 "allowed as an actual argument at %L", sym
->name
,
1855 /* Check if a generic interface has a specific procedure
1856 with the same name before emitting an error. */
1857 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1860 /* Just in case a specific was found for the expression. */
1861 sym
= e
->symtree
->n
.sym
;
1863 /* If the symbol is the function that names the current (or
1864 parent) scope, then we really have a variable reference. */
1866 if (gfc_is_function_return_value (sym
, sym
->ns
))
1869 /* If all else fails, see if we have a specific intrinsic. */
1870 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1872 gfc_intrinsic_sym
*isym
;
1874 isym
= gfc_find_function (sym
->name
);
1875 if (isym
== NULL
|| !isym
->specific
)
1877 gfc_error ("Unable to find a specific INTRINSIC procedure "
1878 "for the reference %qs at %L", sym
->name
,
1883 sym
->attr
.intrinsic
= 1;
1884 sym
->attr
.function
= 1;
1887 if (!gfc_resolve_expr (e
))
1892 /* See if the name is a module procedure in a parent unit. */
1894 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1897 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
1899 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
1903 if (parent_st
== NULL
)
1906 sym
= parent_st
->n
.sym
;
1907 e
->symtree
= parent_st
; /* Point to the right thing. */
1909 if (sym
->attr
.flavor
== FL_PROCEDURE
1910 || sym
->attr
.intrinsic
1911 || sym
->attr
.external
)
1913 if (!gfc_resolve_expr (e
))
1919 e
->expr_type
= EXPR_VARIABLE
;
1921 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
1922 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
1923 && CLASS_DATA (sym
)->as
))
1925 e
->rank
= sym
->ts
.type
== BT_CLASS
1926 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
1927 e
->ref
= gfc_get_ref ();
1928 e
->ref
->type
= REF_ARRAY
;
1929 e
->ref
->u
.ar
.type
= AR_FULL
;
1930 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
1931 ? CLASS_DATA (sym
)->as
: sym
->as
;
1934 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
1935 primary.c (match_actual_arg). If above code determines that it
1936 is a variable instead, it needs to be resolved as it was not
1937 done at the beginning of this function. */
1938 save_need_full_assumed_size
= need_full_assumed_size
;
1939 if (e
->expr_type
!= EXPR_VARIABLE
)
1940 need_full_assumed_size
= 0;
1941 if (!gfc_resolve_expr (e
))
1943 need_full_assumed_size
= save_need_full_assumed_size
;
1946 /* Check argument list functions %VAL, %LOC and %REF. There is
1947 nothing to do for %REF. */
1948 if (arg
->name
&& arg
->name
[0] == '%')
1950 if (strncmp ("%VAL", arg
->name
, 4) == 0)
1952 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
1954 gfc_error ("By-value argument at %L is not of numeric "
1961 gfc_error ("By-value argument at %L cannot be an array or "
1962 "an array section", &e
->where
);
1966 /* Intrinsics are still PROC_UNKNOWN here. However,
1967 since same file external procedures are not resolvable
1968 in gfortran, it is a good deal easier to leave them to
1970 if (ptype
!= PROC_UNKNOWN
1971 && ptype
!= PROC_DUMMY
1972 && ptype
!= PROC_EXTERNAL
1973 && ptype
!= PROC_MODULE
)
1975 gfc_error ("By-value argument at %L is not allowed "
1976 "in this context", &e
->where
);
1981 /* Statement functions have already been excluded above. */
1982 else if (strncmp ("%LOC", arg
->name
, 4) == 0
1983 && e
->ts
.type
== BT_PROCEDURE
)
1985 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
1987 gfc_error ("Passing internal procedure at %L by location "
1988 "not allowed", &e
->where
);
1994 comp
= gfc_get_proc_ptr_comp(e
);
1995 if (e
->expr_type
== EXPR_VARIABLE
1996 && comp
&& comp
->attr
.elemental
)
1998 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
1999 "allowed as an actual argument at %L", comp
->name
,
2003 /* Fortran 2008, C1237. */
2004 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2005 && gfc_has_ultimate_pointer (e
))
2007 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2008 "component", &e
->where
);
2012 first_actual_arg
= false;
2015 return_value
= true;
2018 actual_arg
= actual_arg_sav
;
2019 first_actual_arg
= first_actual_arg_sav
;
2021 return return_value
;
2025 /* Do the checks of the actual argument list that are specific to elemental
2026 procedures. If called with c == NULL, we have a function, otherwise if
2027 expr == NULL, we have a subroutine. */
2030 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2032 gfc_actual_arglist
*arg0
;
2033 gfc_actual_arglist
*arg
;
2034 gfc_symbol
*esym
= NULL
;
2035 gfc_intrinsic_sym
*isym
= NULL
;
2037 gfc_intrinsic_arg
*iformal
= NULL
;
2038 gfc_formal_arglist
*eformal
= NULL
;
2039 bool formal_optional
= false;
2040 bool set_by_optional
= false;
2044 /* Is this an elemental procedure? */
2045 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2047 if (expr
->value
.function
.esym
!= NULL
2048 && expr
->value
.function
.esym
->attr
.elemental
)
2050 arg0
= expr
->value
.function
.actual
;
2051 esym
= expr
->value
.function
.esym
;
2053 else if (expr
->value
.function
.isym
!= NULL
2054 && expr
->value
.function
.isym
->elemental
)
2056 arg0
= expr
->value
.function
.actual
;
2057 isym
= expr
->value
.function
.isym
;
2062 else if (c
&& c
->ext
.actual
!= NULL
)
2064 arg0
= c
->ext
.actual
;
2066 if (c
->resolved_sym
)
2067 esym
= c
->resolved_sym
;
2069 esym
= c
->symtree
->n
.sym
;
2072 if (!esym
->attr
.elemental
)
2078 /* The rank of an elemental is the rank of its array argument(s). */
2079 for (arg
= arg0
; arg
; arg
= arg
->next
)
2081 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2083 rank
= arg
->expr
->rank
;
2084 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2085 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2086 set_by_optional
= true;
2088 /* Function specific; set the result rank and shape. */
2092 if (!expr
->shape
&& arg
->expr
->shape
)
2094 expr
->shape
= gfc_get_shape (rank
);
2095 for (i
= 0; i
< rank
; i
++)
2096 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2103 /* If it is an array, it shall not be supplied as an actual argument
2104 to an elemental procedure unless an array of the same rank is supplied
2105 as an actual argument corresponding to a nonoptional dummy argument of
2106 that elemental procedure(12.4.1.5). */
2107 formal_optional
= false;
2109 iformal
= isym
->formal
;
2111 eformal
= esym
->formal
;
2113 for (arg
= arg0
; arg
; arg
= arg
->next
)
2117 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2118 formal_optional
= true;
2119 eformal
= eformal
->next
;
2121 else if (isym
&& iformal
)
2123 if (iformal
->optional
)
2124 formal_optional
= true;
2125 iformal
= iformal
->next
;
2128 formal_optional
= true;
2130 if (pedantic
&& arg
->expr
!= NULL
2131 && arg
->expr
->expr_type
== EXPR_VARIABLE
2132 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2135 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2136 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2138 gfc_warning (OPT_Wpedantic
,
2139 "%qs at %L is an array and OPTIONAL; IF IT IS "
2140 "MISSING, it cannot be the actual argument of an "
2141 "ELEMENTAL procedure unless there is a non-optional "
2142 "argument with the same rank (12.4.1.5)",
2143 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2147 for (arg
= arg0
; arg
; arg
= arg
->next
)
2149 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2152 /* Being elemental, the last upper bound of an assumed size array
2153 argument must be present. */
2154 if (resolve_assumed_size_actual (arg
->expr
))
2157 /* Elemental procedure's array actual arguments must conform. */
2160 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2167 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2168 is an array, the intent inout/out variable needs to be also an array. */
2169 if (rank
> 0 && esym
&& expr
== NULL
)
2170 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2171 arg
= arg
->next
, eformal
= eformal
->next
)
2172 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2173 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2174 && arg
->expr
&& arg
->expr
->rank
== 0)
2176 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2177 "ELEMENTAL subroutine %qs is a scalar, but another "
2178 "actual argument is an array", &arg
->expr
->where
,
2179 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2180 : "INOUT", eformal
->sym
->name
, esym
->name
);
2187 /* This function does the checking of references to global procedures
2188 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2189 77 and 95 standards. It checks for a gsymbol for the name, making
2190 one if it does not already exist. If it already exists, then the
2191 reference being resolved must correspond to the type of gsymbol.
2192 Otherwise, the new symbol is equipped with the attributes of the
2193 reference. The corresponding code that is called in creating
2194 global entities is parse.c.
2196 In addition, for all but -std=legacy, the gsymbols are used to
2197 check the interfaces of external procedures from the same file.
2198 The namespace of the gsymbol is resolved and then, once this is
2199 done the interface is checked. */
2203 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2205 if (!gsym_ns
->proc_name
->attr
.recursive
)
2208 if (sym
->ns
== gsym_ns
)
2211 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2218 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2220 if (gsym_ns
->entries
)
2222 gfc_entry_list
*entry
= gsym_ns
->entries
;
2224 for (; entry
; entry
= entry
->next
)
2226 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2228 if (strcmp (gsym_ns
->proc_name
->name
,
2229 sym
->ns
->proc_name
->name
) == 0)
2233 && strcmp (gsym_ns
->proc_name
->name
,
2234 sym
->ns
->parent
->proc_name
->name
) == 0)
2243 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2246 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2248 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2250 for ( ; arg
; arg
= arg
->next
)
2255 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2257 strncpy (errmsg
, _("allocatable argument"), err_len
);
2260 else if (arg
->sym
->attr
.asynchronous
)
2262 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2265 else if (arg
->sym
->attr
.optional
)
2267 strncpy (errmsg
, _("optional argument"), err_len
);
2270 else if (arg
->sym
->attr
.pointer
)
2272 strncpy (errmsg
, _("pointer argument"), err_len
);
2275 else if (arg
->sym
->attr
.target
)
2277 strncpy (errmsg
, _("target argument"), err_len
);
2280 else if (arg
->sym
->attr
.value
)
2282 strncpy (errmsg
, _("value argument"), err_len
);
2285 else if (arg
->sym
->attr
.volatile_
)
2287 strncpy (errmsg
, _("volatile argument"), err_len
);
2290 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2292 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2295 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2297 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2300 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2302 strncpy (errmsg
, _("coarray argument"), err_len
);
2305 else if (false) /* (2d) TODO: parametrized derived type */
2307 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2310 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2312 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2315 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2317 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2320 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2322 /* As assumed-type is unlimited polymorphic (cf. above).
2323 See also TS 29113, Note 6.1. */
2324 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2329 if (sym
->attr
.function
)
2331 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2333 if (res
->attr
.dimension
) /* (3a) */
2335 strncpy (errmsg
, _("array result"), err_len
);
2338 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2340 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2343 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2344 && res
->ts
.u
.cl
->length
2345 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2347 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2352 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2354 strncpy (errmsg
, _("elemental procedure"), err_len
);
2357 else if (sym
->attr
.is_bind_c
) /* (5) */
2359 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2368 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2369 gfc_actual_arglist
**actual
, int sub
)
2373 enum gfc_symbol_type type
;
2376 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2378 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2380 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2381 gfc_global_used (gsym
, where
);
2383 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2384 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2385 && gsym
->type
!= GSYM_UNKNOWN
2386 && !gsym
->binding_label
2388 && gsym
->ns
->resolved
!= -1
2389 && gsym
->ns
->proc_name
2390 && not_in_recursive (sym
, gsym
->ns
)
2391 && not_entry_self_reference (sym
, gsym
->ns
))
2393 gfc_symbol
*def_sym
;
2395 /* Resolve the gsymbol namespace if needed. */
2396 if (!gsym
->ns
->resolved
)
2398 gfc_dt_list
*old_dt_list
;
2400 /* Stash away derived types so that the backend_decls do not
2402 old_dt_list
= gfc_derived_types
;
2403 gfc_derived_types
= NULL
;
2405 gfc_resolve (gsym
->ns
);
2407 /* Store the new derived types with the global namespace. */
2408 if (gfc_derived_types
)
2409 gsym
->ns
->derived_types
= gfc_derived_types
;
2411 /* Restore the derived types of this namespace. */
2412 gfc_derived_types
= old_dt_list
;
2415 /* Make sure that translation for the gsymbol occurs before
2416 the procedure currently being resolved. */
2417 ns
= gfc_global_ns_list
;
2418 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2420 if (ns
->sibling
== gsym
->ns
)
2422 ns
->sibling
= gsym
->ns
->sibling
;
2423 gsym
->ns
->sibling
= gfc_global_ns_list
;
2424 gfc_global_ns_list
= gsym
->ns
;
2429 def_sym
= gsym
->ns
->proc_name
;
2431 /* This can happen if a binding name has been specified. */
2432 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2433 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2435 if (def_sym
->attr
.entry_master
)
2437 gfc_entry_list
*entry
;
2438 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2439 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2441 def_sym
= entry
->sym
;
2446 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2448 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2449 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2450 gfc_typename (&def_sym
->ts
));
2454 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2455 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2457 gfc_error ("Explicit interface required for %qs at %L: %s",
2458 sym
->name
, &sym
->declared_at
, reason
);
2462 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2463 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2464 gfc_errors_to_warnings (true);
2466 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2467 reason
, sizeof(reason
), NULL
, NULL
))
2469 gfc_error_opt (OPT_Wargument_mismatch
,
2470 "Interface mismatch in global procedure %qs at %L:"
2471 " %s ", sym
->name
, &sym
->declared_at
, reason
);
2476 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2477 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2478 gfc_errors_to_warnings (true);
2480 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2481 gfc_procedure_use (def_sym
, actual
, where
);
2485 gfc_errors_to_warnings (false);
2487 if (gsym
->type
== GSYM_UNKNOWN
)
2490 gsym
->where
= *where
;
2497 /************* Function resolution *************/
2499 /* Resolve a function call known to be generic.
2500 Section 14.1.2.4.1. */
2503 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2507 if (sym
->attr
.generic
)
2509 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2512 expr
->value
.function
.name
= s
->name
;
2513 expr
->value
.function
.esym
= s
;
2515 if (s
->ts
.type
!= BT_UNKNOWN
)
2517 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2518 expr
->ts
= s
->result
->ts
;
2521 expr
->rank
= s
->as
->rank
;
2522 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2523 expr
->rank
= s
->result
->as
->rank
;
2525 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2530 /* TODO: Need to search for elemental references in generic
2534 if (sym
->attr
.intrinsic
)
2535 return gfc_intrinsic_func_interface (expr
, 0);
2542 resolve_generic_f (gfc_expr
*expr
)
2546 gfc_interface
*intr
= NULL
;
2548 sym
= expr
->symtree
->n
.sym
;
2552 m
= resolve_generic_f0 (expr
, sym
);
2555 else if (m
== MATCH_ERROR
)
2560 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2561 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2564 if (sym
->ns
->parent
== NULL
)
2566 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2570 if (!generic_sym (sym
))
2574 /* Last ditch attempt. See if the reference is to an intrinsic
2575 that possesses a matching interface. 14.1.2.4 */
2576 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2578 if (gfc_init_expr_flag
)
2579 gfc_error ("Function %qs in initialization expression at %L "
2580 "must be an intrinsic function",
2581 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2583 gfc_error ("There is no specific function for the generic %qs "
2584 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2590 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2593 return resolve_structure_cons (expr
, 0);
2596 m
= gfc_intrinsic_func_interface (expr
, 0);
2601 gfc_error ("Generic function %qs at %L is not consistent with a "
2602 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2609 /* Resolve a function call known to be specific. */
2612 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2616 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2618 if (sym
->attr
.dummy
)
2620 sym
->attr
.proc
= PROC_DUMMY
;
2624 sym
->attr
.proc
= PROC_EXTERNAL
;
2628 if (sym
->attr
.proc
== PROC_MODULE
2629 || sym
->attr
.proc
== PROC_ST_FUNCTION
2630 || sym
->attr
.proc
== PROC_INTERNAL
)
2633 if (sym
->attr
.intrinsic
)
2635 m
= gfc_intrinsic_func_interface (expr
, 1);
2639 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2640 "with an intrinsic", sym
->name
, &expr
->where
);
2648 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2651 expr
->ts
= sym
->result
->ts
;
2654 expr
->value
.function
.name
= sym
->name
;
2655 expr
->value
.function
.esym
= sym
;
2656 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2658 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2660 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2661 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2662 else if (sym
->as
!= NULL
)
2663 expr
->rank
= sym
->as
->rank
;
2670 resolve_specific_f (gfc_expr
*expr
)
2675 sym
= expr
->symtree
->n
.sym
;
2679 m
= resolve_specific_f0 (sym
, expr
);
2682 if (m
== MATCH_ERROR
)
2685 if (sym
->ns
->parent
== NULL
)
2688 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2694 gfc_error ("Unable to resolve the specific function %qs at %L",
2695 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2701 /* Resolve a procedure call not known to be generic nor specific. */
2704 resolve_unknown_f (gfc_expr
*expr
)
2709 sym
= expr
->symtree
->n
.sym
;
2711 if (sym
->attr
.dummy
)
2713 sym
->attr
.proc
= PROC_DUMMY
;
2714 expr
->value
.function
.name
= sym
->name
;
2718 /* See if we have an intrinsic function reference. */
2720 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2722 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2727 /* The reference is to an external name. */
2729 sym
->attr
.proc
= PROC_EXTERNAL
;
2730 expr
->value
.function
.name
= sym
->name
;
2731 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2733 if (sym
->as
!= NULL
)
2734 expr
->rank
= sym
->as
->rank
;
2736 /* Type of the expression is either the type of the symbol or the
2737 default type of the symbol. */
2740 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2742 if (sym
->ts
.type
!= BT_UNKNOWN
)
2746 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2748 if (ts
->type
== BT_UNKNOWN
)
2750 gfc_error ("Function %qs at %L has no IMPLICIT type",
2751 sym
->name
, &expr
->where
);
2762 /* Return true, if the symbol is an external procedure. */
2764 is_external_proc (gfc_symbol
*sym
)
2766 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2767 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2768 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2769 && !sym
->attr
.proc_pointer
2770 && !sym
->attr
.use_assoc
2778 /* Figure out if a function reference is pure or not. Also set the name
2779 of the function for a potential error message. Return nonzero if the
2780 function is PURE, zero if not. */
2782 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2785 pure_function (gfc_expr
*e
, const char **name
)
2788 gfc_component
*comp
;
2792 if (e
->symtree
!= NULL
2793 && e
->symtree
->n
.sym
!= NULL
2794 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2795 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2797 comp
= gfc_get_proc_ptr_comp (e
);
2800 pure
= gfc_pure (comp
->ts
.interface
);
2803 else if (e
->value
.function
.esym
)
2805 pure
= gfc_pure (e
->value
.function
.esym
);
2806 *name
= e
->value
.function
.esym
->name
;
2808 else if (e
->value
.function
.isym
)
2810 pure
= e
->value
.function
.isym
->pure
2811 || e
->value
.function
.isym
->elemental
;
2812 *name
= e
->value
.function
.isym
->name
;
2816 /* Implicit functions are not pure. */
2818 *name
= e
->value
.function
.name
;
2826 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2827 int *f ATTRIBUTE_UNUSED
)
2831 /* Don't bother recursing into other statement functions
2832 since they will be checked individually for purity. */
2833 if (e
->expr_type
!= EXPR_FUNCTION
2835 || e
->symtree
->n
.sym
== sym
2836 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2839 return pure_function (e
, &name
) ? false : true;
2844 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2846 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
2850 /* Check if an impure function is allowed in the current context. */
2852 static bool check_pure_function (gfc_expr
*e
)
2854 const char *name
= NULL
;
2855 if (!pure_function (e
, &name
) && name
)
2859 gfc_error ("Reference to impure function %qs at %L inside a "
2860 "FORALL %s", name
, &e
->where
,
2861 forall_flag
== 2 ? "mask" : "block");
2864 else if (gfc_do_concurrent_flag
)
2866 gfc_error ("Reference to impure function %qs at %L inside a "
2867 "DO CONCURRENT %s", name
, &e
->where
,
2868 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
2871 else if (gfc_pure (NULL
))
2873 gfc_error ("Reference to impure function %qs at %L "
2874 "within a PURE procedure", name
, &e
->where
);
2877 gfc_unset_implicit_pure (NULL
);
2883 /* Update current procedure's array_outer_dependency flag, considering
2884 a call to procedure SYM. */
2887 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
2889 /* Check to see if this is a sibling function that has not yet
2891 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
2892 for (; sibling
; sibling
= sibling
->sibling
)
2894 if (sibling
->proc_name
== sym
)
2896 gfc_resolve (sibling
);
2901 /* If SYM has references to outer arrays, so has the procedure calling
2902 SYM. If SYM is a procedure pointer, we can assume the worst. */
2903 if (sym
->attr
.array_outer_dependency
2904 || sym
->attr
.proc_pointer
)
2905 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
2909 /* Resolve a function call, which means resolving the arguments, then figuring
2910 out which entity the name refers to. */
2913 resolve_function (gfc_expr
*expr
)
2915 gfc_actual_arglist
*arg
;
2919 procedure_type p
= PROC_INTRINSIC
;
2920 bool no_formal_args
;
2924 sym
= expr
->symtree
->n
.sym
;
2926 /* If this is a procedure pointer component, it has already been resolved. */
2927 if (gfc_is_proc_ptr_comp (expr
))
2930 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
2932 if (sym
&& sym
->attr
.intrinsic
2933 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
2934 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
2937 if (sym
&& sym
->attr
.intrinsic
2938 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
2941 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
2943 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
2947 /* If this ia a deferred TBP with an abstract interface (which may
2948 of course be referenced), expr->value.function.esym will be set. */
2949 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
2951 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
2952 sym
->name
, &expr
->where
);
2956 /* Switch off assumed size checking and do this again for certain kinds
2957 of procedure, once the procedure itself is resolved. */
2958 need_full_assumed_size
++;
2960 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
2961 p
= expr
->symtree
->n
.sym
->attr
.proc
;
2963 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
2964 inquiry_argument
= true;
2965 no_formal_args
= sym
&& is_external_proc (sym
)
2966 && gfc_sym_get_dummy_args (sym
) == NULL
;
2968 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
2971 inquiry_argument
= false;
2975 inquiry_argument
= false;
2977 /* Resume assumed_size checking. */
2978 need_full_assumed_size
--;
2980 /* If the procedure is external, check for usage. */
2981 if (sym
&& is_external_proc (sym
))
2982 resolve_global_procedure (sym
, &expr
->where
,
2983 &expr
->value
.function
.actual
, 0);
2985 if (sym
&& sym
->ts
.type
== BT_CHARACTER
2987 && sym
->ts
.u
.cl
->length
== NULL
2989 && !sym
->ts
.deferred
2990 && expr
->value
.function
.esym
== NULL
2991 && !sym
->attr
.contained
)
2993 /* Internal procedures are taken care of in resolve_contained_fntype. */
2994 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
2995 "be used at %L since it is not a dummy argument",
2996 sym
->name
, &expr
->where
);
3000 /* See if function is already resolved. */
3002 if (expr
->value
.function
.name
!= NULL
3003 || expr
->value
.function
.isym
!= NULL
)
3005 if (expr
->ts
.type
== BT_UNKNOWN
)
3011 /* Apply the rules of section 14.1.2. */
3013 switch (procedure_kind (sym
))
3016 t
= resolve_generic_f (expr
);
3019 case PTYPE_SPECIFIC
:
3020 t
= resolve_specific_f (expr
);
3024 t
= resolve_unknown_f (expr
);
3028 gfc_internal_error ("resolve_function(): bad function type");
3032 /* If the expression is still a function (it might have simplified),
3033 then we check to see if we are calling an elemental function. */
3035 if (expr
->expr_type
!= EXPR_FUNCTION
)
3038 temp
= need_full_assumed_size
;
3039 need_full_assumed_size
= 0;
3041 if (!resolve_elemental_actual (expr
, NULL
))
3044 if (omp_workshare_flag
3045 && expr
->value
.function
.esym
3046 && ! gfc_elemental (expr
->value
.function
.esym
))
3048 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3049 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3054 #define GENERIC_ID expr->value.function.isym->id
3055 else if (expr
->value
.function
.actual
!= NULL
3056 && expr
->value
.function
.isym
!= NULL
3057 && GENERIC_ID
!= GFC_ISYM_LBOUND
3058 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3059 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3060 && GENERIC_ID
!= GFC_ISYM_LEN
3061 && GENERIC_ID
!= GFC_ISYM_LOC
3062 && GENERIC_ID
!= GFC_ISYM_C_LOC
3063 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3065 /* Array intrinsics must also have the last upper bound of an
3066 assumed size array argument. UBOUND and SIZE have to be
3067 excluded from the check if the second argument is anything
3070 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3072 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3073 && arg
== expr
->value
.function
.actual
3074 && arg
->next
!= NULL
&& arg
->next
->expr
)
3076 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3079 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3082 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3087 if (arg
->expr
!= NULL
3088 && arg
->expr
->rank
> 0
3089 && resolve_assumed_size_actual (arg
->expr
))
3095 need_full_assumed_size
= temp
;
3097 if (!check_pure_function(expr
))
3100 /* Functions without the RECURSIVE attribution are not allowed to
3101 * call themselves. */
3102 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3105 esym
= expr
->value
.function
.esym
;
3107 if (is_illegal_recursion (esym
, gfc_current_ns
))
3109 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3110 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3111 " function %qs is not RECURSIVE",
3112 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3114 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3115 " is not RECURSIVE", esym
->name
, &expr
->where
);
3121 /* Character lengths of use associated functions may contains references to
3122 symbols not referenced from the current program unit otherwise. Make sure
3123 those symbols are marked as referenced. */
3125 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3126 && expr
->value
.function
.esym
->attr
.use_assoc
)
3128 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3131 /* Make sure that the expression has a typespec that works. */
3132 if (expr
->ts
.type
== BT_UNKNOWN
)
3134 if (expr
->symtree
->n
.sym
->result
3135 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3136 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3137 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3140 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3142 if (expr
->value
.function
.esym
)
3143 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3145 update_current_proc_array_outer_dependency (sym
);
3148 /* typebound procedure: Assume the worst. */
3149 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3155 /************* Subroutine resolution *************/
3158 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3165 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3169 else if (gfc_do_concurrent_flag
)
3171 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3175 else if (gfc_pure (NULL
))
3177 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3181 gfc_unset_implicit_pure (NULL
);
3187 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3191 if (sym
->attr
.generic
)
3193 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3196 c
->resolved_sym
= s
;
3197 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3202 /* TODO: Need to search for elemental references in generic interface. */
3205 if (sym
->attr
.intrinsic
)
3206 return gfc_intrinsic_sub_interface (c
, 0);
3213 resolve_generic_s (gfc_code
*c
)
3218 sym
= c
->symtree
->n
.sym
;
3222 m
= resolve_generic_s0 (c
, sym
);
3225 else if (m
== MATCH_ERROR
)
3229 if (sym
->ns
->parent
== NULL
)
3231 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3235 if (!generic_sym (sym
))
3239 /* Last ditch attempt. See if the reference is to an intrinsic
3240 that possesses a matching interface. 14.1.2.4 */
3241 sym
= c
->symtree
->n
.sym
;
3243 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3245 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3246 sym
->name
, &c
->loc
);
3250 m
= gfc_intrinsic_sub_interface (c
, 0);
3254 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3255 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3261 /* Resolve a subroutine call known to be specific. */
3264 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3268 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3270 if (sym
->attr
.dummy
)
3272 sym
->attr
.proc
= PROC_DUMMY
;
3276 sym
->attr
.proc
= PROC_EXTERNAL
;
3280 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3283 if (sym
->attr
.intrinsic
)
3285 m
= gfc_intrinsic_sub_interface (c
, 1);
3289 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3290 "with an intrinsic", sym
->name
, &c
->loc
);
3298 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3300 c
->resolved_sym
= sym
;
3301 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3309 resolve_specific_s (gfc_code
*c
)
3314 sym
= c
->symtree
->n
.sym
;
3318 m
= resolve_specific_s0 (c
, sym
);
3321 if (m
== MATCH_ERROR
)
3324 if (sym
->ns
->parent
== NULL
)
3327 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3333 sym
= c
->symtree
->n
.sym
;
3334 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3335 sym
->name
, &c
->loc
);
3341 /* Resolve a subroutine call not known to be generic nor specific. */
3344 resolve_unknown_s (gfc_code
*c
)
3348 sym
= c
->symtree
->n
.sym
;
3350 if (sym
->attr
.dummy
)
3352 sym
->attr
.proc
= PROC_DUMMY
;
3356 /* See if we have an intrinsic function reference. */
3358 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3360 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3365 /* The reference is to an external name. */
3368 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3370 c
->resolved_sym
= sym
;
3372 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3376 /* Resolve a subroutine call. Although it was tempting to use the same code
3377 for functions, subroutines and functions are stored differently and this
3378 makes things awkward. */
3381 resolve_call (gfc_code
*c
)
3384 procedure_type ptype
= PROC_INTRINSIC
;
3385 gfc_symbol
*csym
, *sym
;
3386 bool no_formal_args
;
3388 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3390 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3392 gfc_error ("%qs at %L has a type, which is not consistent with "
3393 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3397 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3400 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3401 sym
= st
? st
->n
.sym
: NULL
;
3402 if (sym
&& csym
!= sym
3403 && sym
->ns
== gfc_current_ns
3404 && sym
->attr
.flavor
== FL_PROCEDURE
3405 && sym
->attr
.contained
)
3408 if (csym
->attr
.generic
)
3409 c
->symtree
->n
.sym
= sym
;
3412 csym
= c
->symtree
->n
.sym
;
3416 /* If this ia a deferred TBP, c->expr1 will be set. */
3417 if (!c
->expr1
&& csym
)
3419 if (csym
->attr
.abstract
)
3421 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3422 csym
->name
, &c
->loc
);
3426 /* Subroutines without the RECURSIVE attribution are not allowed to
3428 if (is_illegal_recursion (csym
, gfc_current_ns
))
3430 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3431 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3432 "as subroutine %qs is not RECURSIVE",
3433 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3435 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3436 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3442 /* Switch off assumed size checking and do this again for certain kinds
3443 of procedure, once the procedure itself is resolved. */
3444 need_full_assumed_size
++;
3447 ptype
= csym
->attr
.proc
;
3449 no_formal_args
= csym
&& is_external_proc (csym
)
3450 && gfc_sym_get_dummy_args (csym
) == NULL
;
3451 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3454 /* Resume assumed_size checking. */
3455 need_full_assumed_size
--;
3457 /* If external, check for usage. */
3458 if (csym
&& is_external_proc (csym
))
3459 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3462 if (c
->resolved_sym
== NULL
)
3464 c
->resolved_isym
= NULL
;
3465 switch (procedure_kind (csym
))
3468 t
= resolve_generic_s (c
);
3471 case PTYPE_SPECIFIC
:
3472 t
= resolve_specific_s (c
);
3476 t
= resolve_unknown_s (c
);
3480 gfc_internal_error ("resolve_subroutine(): bad function type");
3484 /* Some checks of elemental subroutine actual arguments. */
3485 if (!resolve_elemental_actual (NULL
, c
))
3489 update_current_proc_array_outer_dependency (csym
);
3491 /* Typebound procedure: Assume the worst. */
3492 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3498 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3499 op1->shape and op2->shape are non-NULL return true if their shapes
3500 match. If both op1->shape and op2->shape are non-NULL return false
3501 if their shapes do not match. If either op1->shape or op2->shape is
3502 NULL, return true. */
3505 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3512 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3514 for (i
= 0; i
< op1
->rank
; i
++)
3516 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3518 gfc_error ("Shapes for operands at %L and %L are not conformable",
3519 &op1
->where
, &op2
->where
);
3529 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3530 For example A .AND. B becomes IAND(A, B). */
3532 logical_to_bitwise (gfc_expr
*e
)
3534 gfc_expr
*tmp
, *op1
, *op2
;
3536 gfc_actual_arglist
*args
= NULL
;
3538 gcc_assert (e
->expr_type
== EXPR_OP
);
3540 isym
= GFC_ISYM_NONE
;
3541 op1
= e
->value
.op
.op1
;
3542 op2
= e
->value
.op
.op2
;
3544 switch (e
->value
.op
.op
)
3547 isym
= GFC_ISYM_NOT
;
3550 isym
= GFC_ISYM_IAND
;
3553 isym
= GFC_ISYM_IOR
;
3555 case INTRINSIC_NEQV
:
3556 isym
= GFC_ISYM_IEOR
;
3559 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3560 Change the old expression to NEQV, which will get replaced by IEOR,
3561 and wrap it in NOT. */
3562 tmp
= gfc_copy_expr (e
);
3563 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3564 tmp
= logical_to_bitwise (tmp
);
3565 isym
= GFC_ISYM_NOT
;
3570 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3573 /* Inherit the original operation's operands as arguments. */
3574 args
= gfc_get_actual_arglist ();
3578 args
->next
= gfc_get_actual_arglist ();
3579 args
->next
->expr
= op2
;
3582 /* Convert the expression to a function call. */
3583 e
->expr_type
= EXPR_FUNCTION
;
3584 e
->value
.function
.actual
= args
;
3585 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3586 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3587 e
->value
.function
.esym
= NULL
;
3589 /* Make up a pre-resolved function call symtree if we need to. */
3590 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3593 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3594 sym
= e
->symtree
->n
.sym
;
3596 sym
->attr
.flavor
= FL_PROCEDURE
;
3597 sym
->attr
.function
= 1;
3598 sym
->attr
.elemental
= 1;
3600 sym
->attr
.referenced
= 1;
3601 gfc_intrinsic_symbol (sym
);
3602 gfc_commit_symbol (sym
);
3605 args
->name
= e
->value
.function
.isym
->formal
->name
;
3606 if (e
->value
.function
.isym
->formal
->next
)
3607 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3612 /* Resolve an operator expression node. This can involve replacing the
3613 operation with a user defined function call. */
3616 resolve_operator (gfc_expr
*e
)
3618 gfc_expr
*op1
, *op2
;
3620 bool dual_locus_error
;
3623 /* Resolve all subnodes-- give them types. */
3625 switch (e
->value
.op
.op
)
3628 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3634 case INTRINSIC_UPLUS
:
3635 case INTRINSIC_UMINUS
:
3636 case INTRINSIC_PARENTHESES
:
3637 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3642 /* Typecheck the new node. */
3644 op1
= e
->value
.op
.op1
;
3645 op2
= e
->value
.op
.op2
;
3646 dual_locus_error
= false;
3648 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3649 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3651 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3655 switch (e
->value
.op
.op
)
3657 case INTRINSIC_UPLUS
:
3658 case INTRINSIC_UMINUS
:
3659 if (op1
->ts
.type
== BT_INTEGER
3660 || op1
->ts
.type
== BT_REAL
3661 || op1
->ts
.type
== BT_COMPLEX
)
3667 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3668 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3671 case INTRINSIC_PLUS
:
3672 case INTRINSIC_MINUS
:
3673 case INTRINSIC_TIMES
:
3674 case INTRINSIC_DIVIDE
:
3675 case INTRINSIC_POWER
:
3676 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3678 gfc_type_convert_binary (e
, 1);
3683 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3684 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3685 gfc_typename (&op2
->ts
));
3688 case INTRINSIC_CONCAT
:
3689 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3690 && op1
->ts
.kind
== op2
->ts
.kind
)
3692 e
->ts
.type
= BT_CHARACTER
;
3693 e
->ts
.kind
= op1
->ts
.kind
;
3698 _("Operands of string concatenation operator at %%L are %s/%s"),
3699 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3705 case INTRINSIC_NEQV
:
3706 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3708 e
->ts
.type
= BT_LOGICAL
;
3709 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3710 if (op1
->ts
.kind
< e
->ts
.kind
)
3711 gfc_convert_type (op1
, &e
->ts
, 2);
3712 else if (op2
->ts
.kind
< e
->ts
.kind
)
3713 gfc_convert_type (op2
, &e
->ts
, 2);
3717 /* Logical ops on integers become bitwise ops with -fdec. */
3719 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3721 e
->ts
.type
= BT_INTEGER
;
3722 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3723 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3724 gfc_convert_type (op1
, &e
->ts
, 1);
3725 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3726 gfc_convert_type (op2
, &e
->ts
, 1);
3727 e
= logical_to_bitwise (e
);
3728 return resolve_function (e
);
3731 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3732 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3733 gfc_typename (&op2
->ts
));
3738 /* Logical ops on integers become bitwise ops with -fdec. */
3739 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3741 e
->ts
.type
= BT_INTEGER
;
3742 e
->ts
.kind
= op1
->ts
.kind
;
3743 e
= logical_to_bitwise (e
);
3744 return resolve_function (e
);
3747 if (op1
->ts
.type
== BT_LOGICAL
)
3749 e
->ts
.type
= BT_LOGICAL
;
3750 e
->ts
.kind
= op1
->ts
.kind
;
3754 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3755 gfc_typename (&op1
->ts
));
3759 case INTRINSIC_GT_OS
:
3761 case INTRINSIC_GE_OS
:
3763 case INTRINSIC_LT_OS
:
3765 case INTRINSIC_LE_OS
:
3766 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3768 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3775 case INTRINSIC_EQ_OS
:
3777 case INTRINSIC_NE_OS
:
3778 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3779 && op1
->ts
.kind
== op2
->ts
.kind
)
3781 e
->ts
.type
= BT_LOGICAL
;
3782 e
->ts
.kind
= gfc_default_logical_kind
;
3786 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3788 gfc_type_convert_binary (e
, 1);
3790 e
->ts
.type
= BT_LOGICAL
;
3791 e
->ts
.kind
= gfc_default_logical_kind
;
3793 if (warn_compare_reals
)
3795 gfc_intrinsic_op op
= e
->value
.op
.op
;
3797 /* Type conversion has made sure that the types of op1 and op2
3798 agree, so it is only necessary to check the first one. */
3799 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3800 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3801 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
3805 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
3806 msg
= "Equality comparison for %s at %L";
3808 msg
= "Inequality comparison for %s at %L";
3810 gfc_warning (OPT_Wcompare_reals
, msg
,
3811 gfc_typename (&op1
->ts
), &op1
->where
);
3818 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3820 _("Logicals at %%L must be compared with %s instead of %s"),
3821 (e
->value
.op
.op
== INTRINSIC_EQ
3822 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
3823 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
3826 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
3827 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3828 gfc_typename (&op2
->ts
));
3832 case INTRINSIC_USER
:
3833 if (e
->value
.op
.uop
->op
== NULL
)
3834 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"),
3835 e
->value
.op
.uop
->name
);
3836 else if (op2
== NULL
)
3837 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
3838 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
3841 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
3842 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
3843 gfc_typename (&op2
->ts
));
3844 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
3849 case INTRINSIC_PARENTHESES
:
3851 if (e
->ts
.type
== BT_CHARACTER
)
3852 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
3856 gfc_internal_error ("resolve_operator(): Bad intrinsic");
3859 /* Deal with arrayness of an operand through an operator. */
3863 switch (e
->value
.op
.op
)
3865 case INTRINSIC_PLUS
:
3866 case INTRINSIC_MINUS
:
3867 case INTRINSIC_TIMES
:
3868 case INTRINSIC_DIVIDE
:
3869 case INTRINSIC_POWER
:
3870 case INTRINSIC_CONCAT
:
3874 case INTRINSIC_NEQV
:
3876 case INTRINSIC_EQ_OS
:
3878 case INTRINSIC_NE_OS
:
3880 case INTRINSIC_GT_OS
:
3882 case INTRINSIC_GE_OS
:
3884 case INTRINSIC_LT_OS
:
3886 case INTRINSIC_LE_OS
:
3888 if (op1
->rank
== 0 && op2
->rank
== 0)
3891 if (op1
->rank
== 0 && op2
->rank
!= 0)
3893 e
->rank
= op2
->rank
;
3895 if (e
->shape
== NULL
)
3896 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
3899 if (op1
->rank
!= 0 && op2
->rank
== 0)
3901 e
->rank
= op1
->rank
;
3903 if (e
->shape
== NULL
)
3904 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3907 if (op1
->rank
!= 0 && op2
->rank
!= 0)
3909 if (op1
->rank
== op2
->rank
)
3911 e
->rank
= op1
->rank
;
3912 if (e
->shape
== NULL
)
3914 t
= compare_shapes (op1
, op2
);
3918 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3923 /* Allow higher level expressions to work. */
3926 /* Try user-defined operators, and otherwise throw an error. */
3927 dual_locus_error
= true;
3929 _("Inconsistent ranks for operator at %%L and %%L"));
3936 case INTRINSIC_PARENTHESES
:
3938 case INTRINSIC_UPLUS
:
3939 case INTRINSIC_UMINUS
:
3940 /* Simply copy arrayness attribute */
3941 e
->rank
= op1
->rank
;
3943 if (e
->shape
== NULL
)
3944 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3952 /* Attempt to simplify the expression. */
3955 t
= gfc_simplify_expr (e
, 0);
3956 /* Some calls do not succeed in simplification and return false
3957 even though there is no error; e.g. variable references to
3958 PARAMETER arrays. */
3959 if (!gfc_is_constant_expr (e
))
3967 match m
= gfc_extend_expr (e
);
3970 if (m
== MATCH_ERROR
)
3974 if (dual_locus_error
)
3975 gfc_error (msg
, &op1
->where
, &op2
->where
);
3977 gfc_error (msg
, &e
->where
);
3983 /************** Array resolution subroutines **************/
3986 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
3988 /* Compare two integer expressions. */
3990 static compare_result
3991 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
3995 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
3996 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
3999 /* If either of the types isn't INTEGER, we must have
4000 raised an error earlier. */
4002 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4005 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4015 /* Compare an integer expression with an integer. */
4017 static compare_result
4018 compare_bound_int (gfc_expr
*a
, int b
)
4022 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4025 if (a
->ts
.type
!= BT_INTEGER
)
4026 gfc_internal_error ("compare_bound_int(): Bad expression");
4028 i
= mpz_cmp_si (a
->value
.integer
, b
);
4038 /* Compare an integer expression with a mpz_t. */
4040 static compare_result
4041 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4045 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4048 if (a
->ts
.type
!= BT_INTEGER
)
4049 gfc_internal_error ("compare_bound_int(): Bad expression");
4051 i
= mpz_cmp (a
->value
.integer
, b
);
4061 /* Compute the last value of a sequence given by a triplet.
4062 Return 0 if it wasn't able to compute the last value, or if the
4063 sequence if empty, and 1 otherwise. */
4066 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4067 gfc_expr
*stride
, mpz_t last
)
4071 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4072 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4073 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4076 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4077 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4080 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4082 if (compare_bound (start
, end
) == CMP_GT
)
4084 mpz_set (last
, end
->value
.integer
);
4088 if (compare_bound_int (stride
, 0) == CMP_GT
)
4090 /* Stride is positive */
4091 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4096 /* Stride is negative */
4097 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4102 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4103 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4104 mpz_sub (last
, end
->value
.integer
, rem
);
4111 /* Compare a single dimension of an array reference to the array
4115 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4119 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4121 gcc_assert (ar
->stride
[i
] == NULL
);
4122 /* This implies [*] as [*:] and [*:3] are not possible. */
4123 if (ar
->start
[i
] == NULL
)
4125 gcc_assert (ar
->end
[i
] == NULL
);
4130 /* Given start, end and stride values, calculate the minimum and
4131 maximum referenced indexes. */
4133 switch (ar
->dimen_type
[i
])
4136 case DIMEN_THIS_IMAGE
:
4141 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4144 gfc_warning (0, "Array reference at %L is out of bounds "
4145 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4146 mpz_get_si (ar
->start
[i
]->value
.integer
),
4147 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4149 gfc_warning (0, "Array reference at %L is out of bounds "
4150 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4151 mpz_get_si (ar
->start
[i
]->value
.integer
),
4152 mpz_get_si (as
->lower
[i
]->value
.integer
),
4156 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4159 gfc_warning (0, "Array reference at %L is out of bounds "
4160 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4161 mpz_get_si (ar
->start
[i
]->value
.integer
),
4162 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4164 gfc_warning (0, "Array reference at %L is out of bounds "
4165 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4166 mpz_get_si (ar
->start
[i
]->value
.integer
),
4167 mpz_get_si (as
->upper
[i
]->value
.integer
),
4176 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4177 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4179 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4181 /* Check for zero stride, which is not allowed. */
4182 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4184 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4188 /* if start == len || (stride > 0 && start < len)
4189 || (stride < 0 && start > len),
4190 then the array section contains at least one element. In this
4191 case, there is an out-of-bounds access if
4192 (start < lower || start > upper). */
4193 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4194 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4195 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4196 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4197 && comp_start_end
== CMP_GT
))
4199 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4201 gfc_warning (0, "Lower array reference at %L is out of bounds "
4202 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4203 mpz_get_si (AR_START
->value
.integer
),
4204 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4207 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4209 gfc_warning (0, "Lower array reference at %L is out of bounds "
4210 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4211 mpz_get_si (AR_START
->value
.integer
),
4212 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4217 /* If we can compute the highest index of the array section,
4218 then it also has to be between lower and upper. */
4219 mpz_init (last_value
);
4220 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4223 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4225 gfc_warning (0, "Upper array reference at %L is out of bounds "
4226 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4227 mpz_get_si (last_value
),
4228 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4229 mpz_clear (last_value
);
4232 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4234 gfc_warning (0, "Upper array reference at %L is out of bounds "
4235 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4236 mpz_get_si (last_value
),
4237 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4238 mpz_clear (last_value
);
4242 mpz_clear (last_value
);
4250 gfc_internal_error ("check_dimension(): Bad array reference");
4257 /* Compare an array reference with an array specification. */
4260 compare_spec_to_ref (gfc_array_ref
*ar
)
4267 /* TODO: Full array sections are only allowed as actual parameters. */
4268 if (as
->type
== AS_ASSUMED_SIZE
4269 && (/*ar->type == AR_FULL
4270 ||*/ (ar
->type
== AR_SECTION
4271 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4273 gfc_error ("Rightmost upper bound of assumed size array section "
4274 "not specified at %L", &ar
->where
);
4278 if (ar
->type
== AR_FULL
)
4281 if (as
->rank
!= ar
->dimen
)
4283 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4284 &ar
->where
, ar
->dimen
, as
->rank
);
4288 /* ar->codimen == 0 is a local array. */
4289 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4291 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4292 &ar
->where
, ar
->codimen
, as
->corank
);
4296 for (i
= 0; i
< as
->rank
; i
++)
4297 if (!check_dimension (i
, ar
, as
))
4300 /* Local access has no coarray spec. */
4301 if (ar
->codimen
!= 0)
4302 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4304 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4305 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4307 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4308 i
+ 1 - as
->rank
, &ar
->where
);
4311 if (!check_dimension (i
, ar
, as
))
4319 /* Resolve one part of an array index. */
4322 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4323 int force_index_integer_kind
)
4330 if (!gfc_resolve_expr (index
))
4333 if (check_scalar
&& index
->rank
!= 0)
4335 gfc_error ("Array index at %L must be scalar", &index
->where
);
4339 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4341 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4342 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4346 if (index
->ts
.type
== BT_REAL
)
4347 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4351 if ((index
->ts
.kind
!= gfc_index_integer_kind
4352 && force_index_integer_kind
)
4353 || index
->ts
.type
!= BT_INTEGER
)
4356 ts
.type
= BT_INTEGER
;
4357 ts
.kind
= gfc_index_integer_kind
;
4359 gfc_convert_type_warn (index
, &ts
, 2, 0);
4365 /* Resolve one part of an array index. */
4368 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4370 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4373 /* Resolve a dim argument to an intrinsic function. */
4376 gfc_resolve_dim_arg (gfc_expr
*dim
)
4381 if (!gfc_resolve_expr (dim
))
4386 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4391 if (dim
->ts
.type
!= BT_INTEGER
)
4393 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4397 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4402 ts
.type
= BT_INTEGER
;
4403 ts
.kind
= gfc_index_integer_kind
;
4405 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4411 /* Given an expression that contains array references, update those array
4412 references to point to the right array specifications. While this is
4413 filled in during matching, this information is difficult to save and load
4414 in a module, so we take care of it here.
4416 The idea here is that the original array reference comes from the
4417 base symbol. We traverse the list of reference structures, setting
4418 the stored reference to references. Component references can
4419 provide an additional array specification. */
4422 find_array_spec (gfc_expr
*e
)
4428 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4429 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4431 as
= e
->symtree
->n
.sym
->as
;
4433 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4438 gfc_internal_error ("find_array_spec(): Missing spec");
4445 c
= ref
->u
.c
.component
;
4446 if (c
->attr
.dimension
)
4449 gfc_internal_error ("find_array_spec(): unused as(1)");
4460 gfc_internal_error ("find_array_spec(): unused as(2)");
4464 /* Resolve an array reference. */
4467 resolve_array_ref (gfc_array_ref
*ar
)
4469 int i
, check_scalar
;
4472 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4474 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4476 /* Do not force gfc_index_integer_kind for the start. We can
4477 do fine with any integer kind. This avoids temporary arrays
4478 created for indexing with a vector. */
4479 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4481 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4483 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4488 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4492 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4496 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4497 if (e
->expr_type
== EXPR_VARIABLE
4498 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4499 ar
->start
[i
] = gfc_get_parentheses (e
);
4503 gfc_error ("Array index at %L is an array of rank %d",
4504 &ar
->c_where
[i
], e
->rank
);
4508 /* Fill in the upper bound, which may be lower than the
4509 specified one for something like a(2:10:5), which is
4510 identical to a(2:7:5). Only relevant for strides not equal
4511 to one. Don't try a division by zero. */
4512 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4513 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4514 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4515 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4519 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4521 if (ar
->end
[i
] == NULL
)
4524 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4526 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4528 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4529 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4531 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4542 if (ar
->type
== AR_FULL
)
4544 if (ar
->as
->rank
== 0)
4545 ar
->type
= AR_ELEMENT
;
4547 /* Make sure array is the same as array(:,:), this way
4548 we don't need to special case all the time. */
4549 ar
->dimen
= ar
->as
->rank
;
4550 for (i
= 0; i
< ar
->dimen
; i
++)
4552 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4554 gcc_assert (ar
->start
[i
] == NULL
);
4555 gcc_assert (ar
->end
[i
] == NULL
);
4556 gcc_assert (ar
->stride
[i
] == NULL
);
4560 /* If the reference type is unknown, figure out what kind it is. */
4562 if (ar
->type
== AR_UNKNOWN
)
4564 ar
->type
= AR_ELEMENT
;
4565 for (i
= 0; i
< ar
->dimen
; i
++)
4566 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4567 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4569 ar
->type
= AR_SECTION
;
4574 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4577 if (ar
->as
->corank
&& ar
->codimen
== 0)
4580 ar
->codimen
= ar
->as
->corank
;
4581 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4582 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4590 resolve_substring (gfc_ref
*ref
)
4592 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4594 if (ref
->u
.ss
.start
!= NULL
)
4596 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4599 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4601 gfc_error ("Substring start index at %L must be of type INTEGER",
4602 &ref
->u
.ss
.start
->where
);
4606 if (ref
->u
.ss
.start
->rank
!= 0)
4608 gfc_error ("Substring start index at %L must be scalar",
4609 &ref
->u
.ss
.start
->where
);
4613 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4614 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4615 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4617 gfc_error ("Substring start index at %L is less than one",
4618 &ref
->u
.ss
.start
->where
);
4623 if (ref
->u
.ss
.end
!= NULL
)
4625 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4628 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4630 gfc_error ("Substring end index at %L must be of type INTEGER",
4631 &ref
->u
.ss
.end
->where
);
4635 if (ref
->u
.ss
.end
->rank
!= 0)
4637 gfc_error ("Substring end index at %L must be scalar",
4638 &ref
->u
.ss
.end
->where
);
4642 if (ref
->u
.ss
.length
!= NULL
4643 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4644 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4645 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4647 gfc_error ("Substring end index at %L exceeds the string length",
4648 &ref
->u
.ss
.start
->where
);
4652 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4653 gfc_integer_kinds
[k
].huge
) == CMP_GT
4654 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4655 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4657 gfc_error ("Substring end index at %L is too large",
4658 &ref
->u
.ss
.end
->where
);
4667 /* This function supplies missing substring charlens. */
4670 gfc_resolve_substring_charlen (gfc_expr
*e
)
4673 gfc_expr
*start
, *end
;
4674 gfc_typespec
*ts
= NULL
;
4676 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4678 if (char_ref
->type
== REF_SUBSTRING
)
4680 if (char_ref
->type
== REF_COMPONENT
)
4681 ts
= &char_ref
->u
.c
.component
->ts
;
4687 gcc_assert (char_ref
->next
== NULL
);
4691 if (e
->ts
.u
.cl
->length
)
4692 gfc_free_expr (e
->ts
.u
.cl
->length
);
4693 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4697 e
->ts
.type
= BT_CHARACTER
;
4698 e
->ts
.kind
= gfc_default_character_kind
;
4701 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4703 if (char_ref
->u
.ss
.start
)
4704 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4706 start
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
4708 if (char_ref
->u
.ss
.end
)
4709 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4710 else if (e
->expr_type
== EXPR_VARIABLE
)
4713 ts
= &e
->symtree
->n
.sym
->ts
;
4714 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4721 gfc_free_expr (start
);
4722 gfc_free_expr (end
);
4726 /* Length = (end - start + 1). */
4727 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4728 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4729 gfc_get_int_expr (gfc_default_integer_kind
,
4732 /* F2008, 6.4.1: Both the starting point and the ending point shall
4733 be within the range 1, 2, ..., n unless the starting point exceeds
4734 the ending point, in which case the substring has length zero. */
4736 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4737 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4739 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4740 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4742 /* Make sure that the length is simplified. */
4743 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4744 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4748 /* Resolve subtype references. */
4751 resolve_ref (gfc_expr
*expr
)
4753 int current_part_dimension
, n_components
, seen_part_dimension
;
4756 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4757 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4759 find_array_spec (expr
);
4763 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4767 if (!resolve_array_ref (&ref
->u
.ar
))
4775 if (!resolve_substring (ref
))
4780 /* Check constraints on part references. */
4782 current_part_dimension
= 0;
4783 seen_part_dimension
= 0;
4786 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4791 switch (ref
->u
.ar
.type
)
4794 /* Coarray scalar. */
4795 if (ref
->u
.ar
.as
->rank
== 0)
4797 current_part_dimension
= 0;
4802 current_part_dimension
= 1;
4806 current_part_dimension
= 0;
4810 gfc_internal_error ("resolve_ref(): Bad array reference");
4816 if (current_part_dimension
|| seen_part_dimension
)
4819 if (ref
->u
.c
.component
->attr
.pointer
4820 || ref
->u
.c
.component
->attr
.proc_pointer
4821 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
4822 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
4824 gfc_error ("Component to the right of a part reference "
4825 "with nonzero rank must not have the POINTER "
4826 "attribute at %L", &expr
->where
);
4829 else if (ref
->u
.c
.component
->attr
.allocatable
4830 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
4831 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
4834 gfc_error ("Component to the right of a part reference "
4835 "with nonzero rank must not have the ALLOCATABLE "
4836 "attribute at %L", &expr
->where
);
4848 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
4849 || ref
->next
== NULL
)
4850 && current_part_dimension
4851 && seen_part_dimension
)
4853 gfc_error ("Two or more part references with nonzero rank must "
4854 "not be specified at %L", &expr
->where
);
4858 if (ref
->type
== REF_COMPONENT
)
4860 if (current_part_dimension
)
4861 seen_part_dimension
= 1;
4863 /* reset to make sure */
4864 current_part_dimension
= 0;
4872 /* Given an expression, determine its shape. This is easier than it sounds.
4873 Leaves the shape array NULL if it is not possible to determine the shape. */
4876 expression_shape (gfc_expr
*e
)
4878 mpz_t array
[GFC_MAX_DIMENSIONS
];
4881 if (e
->rank
<= 0 || e
->shape
!= NULL
)
4884 for (i
= 0; i
< e
->rank
; i
++)
4885 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
4888 e
->shape
= gfc_get_shape (e
->rank
);
4890 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
4895 for (i
--; i
>= 0; i
--)
4896 mpz_clear (array
[i
]);
4900 /* Given a variable expression node, compute the rank of the expression by
4901 examining the base symbol and any reference structures it may have. */
4904 expression_rank (gfc_expr
*e
)
4909 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
4910 could lead to serious confusion... */
4911 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
4915 if (e
->expr_type
== EXPR_ARRAY
)
4917 /* Constructors can have a rank different from one via RESHAPE(). */
4919 if (e
->symtree
== NULL
)
4925 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
4926 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
4932 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4934 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
4935 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
4936 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
4938 if (ref
->type
!= REF_ARRAY
)
4941 if (ref
->u
.ar
.type
== AR_FULL
)
4943 rank
= ref
->u
.ar
.as
->rank
;
4947 if (ref
->u
.ar
.type
== AR_SECTION
)
4949 /* Figure out the rank of the section. */
4951 gfc_internal_error ("expression_rank(): Two array specs");
4953 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
4954 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
4955 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
4965 expression_shape (e
);
4970 add_caf_get_intrinsic (gfc_expr
*e
)
4972 gfc_expr
*wrapper
, *tmp_expr
;
4976 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4977 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
4982 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
4983 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
4986 tmp_expr
= XCNEW (gfc_expr
);
4988 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
4989 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
4990 wrapper
->ts
= e
->ts
;
4991 wrapper
->rank
= e
->rank
;
4993 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5000 remove_caf_get_intrinsic (gfc_expr
*e
)
5002 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5003 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5004 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5005 e
->value
.function
.actual
->expr
= NULL
;
5006 gfc_free_actual_arglist (e
->value
.function
.actual
);
5007 gfc_free_shape (&e
->shape
, e
->rank
);
5013 /* Resolve a variable expression. */
5016 resolve_variable (gfc_expr
*e
)
5023 if (e
->symtree
== NULL
)
5025 sym
= e
->symtree
->n
.sym
;
5027 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5028 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5029 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5031 if (!actual_arg
|| inquiry_argument
)
5033 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5034 "be used as actual argument", sym
->name
, &e
->where
);
5038 /* TS 29113, 407b. */
5039 else if (e
->ts
.type
== BT_ASSUMED
)
5043 gfc_error ("Assumed-type variable %s at %L may only be used "
5044 "as actual argument", sym
->name
, &e
->where
);
5047 else if (inquiry_argument
&& !first_actual_arg
)
5049 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5050 for all inquiry functions in resolve_function; the reason is
5051 that the function-name resolution happens too late in that
5053 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5054 "an inquiry function shall be the first argument",
5055 sym
->name
, &e
->where
);
5059 /* TS 29113, C535b. */
5060 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5061 && CLASS_DATA (sym
)->as
5062 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5063 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5064 && sym
->as
->type
== AS_ASSUMED_RANK
))
5068 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5069 "actual argument", sym
->name
, &e
->where
);
5072 else if (inquiry_argument
&& !first_actual_arg
)
5074 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5075 for all inquiry functions in resolve_function; the reason is
5076 that the function-name resolution happens too late in that
5078 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5079 "to an inquiry function shall be the first argument",
5080 sym
->name
, &e
->where
);
5085 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5086 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5087 && e
->ref
->next
== NULL
))
5089 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5090 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5093 /* TS 29113, 407b. */
5094 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5095 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5096 && e
->ref
->next
== NULL
))
5098 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5099 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5103 /* TS 29113, C535b. */
5104 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5105 && CLASS_DATA (sym
)->as
5106 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5107 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5108 && sym
->as
->type
== AS_ASSUMED_RANK
))
5110 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5111 && e
->ref
->next
== NULL
))
5113 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5114 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5118 /* For variables that are used in an associate (target => object) where
5119 the object's basetype is array valued while the target is scalar,
5120 the ts' type of the component refs is still array valued, which
5121 can't be translated that way. */
5122 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5123 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5124 && CLASS_DATA (sym
->assoc
->target
)->as
)
5126 gfc_ref
*ref
= e
->ref
;
5132 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5133 /* Stop the loop. */
5143 /* If this is an associate-name, it may be parsed with an array reference
5144 in error even though the target is scalar. Fail directly in this case.
5145 TODO Understand why class scalar expressions must be excluded. */
5146 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5148 if (sym
->ts
.type
== BT_CLASS
)
5149 gfc_fix_class_refs (e
);
5150 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5154 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5155 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5157 /* On the other hand, the parser may not have known this is an array;
5158 in this case, we have to add a FULL reference. */
5159 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5161 e
->ref
= gfc_get_ref ();
5162 e
->ref
->type
= REF_ARRAY
;
5163 e
->ref
->u
.ar
.type
= AR_FULL
;
5164 e
->ref
->u
.ar
.dimen
= 0;
5167 /* Like above, but for class types, where the checking whether an array
5168 ref is present is more complicated. Furthermore make sure not to add
5169 the full array ref to _vptr or _len refs. */
5170 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5171 && CLASS_DATA (sym
)->attr
.dimension
5172 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5174 gfc_ref
*ref
, *newref
;
5176 newref
= gfc_get_ref ();
5177 newref
->type
= REF_ARRAY
;
5178 newref
->u
.ar
.type
= AR_FULL
;
5179 newref
->u
.ar
.dimen
= 0;
5180 /* Because this is an associate var and the first ref either is a ref to
5181 the _data component or not, no traversal of the ref chain is
5182 needed. The array ref needs to be inserted after the _data ref,
5183 or when that is not present, which may happend for polymorphic
5184 types, then at the first position. */
5188 else if (ref
->type
== REF_COMPONENT
5189 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5191 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5193 newref
->next
= ref
->next
;
5197 /* Array ref present already. */
5198 gfc_free_ref_list (newref
);
5200 else if (ref
->type
== REF_ARRAY
)
5201 /* Array ref present already. */
5202 gfc_free_ref_list (newref
);
5210 if (e
->ref
&& !resolve_ref (e
))
5213 if (sym
->attr
.flavor
== FL_PROCEDURE
5214 && (!sym
->attr
.function
5215 || (sym
->attr
.function
&& sym
->result
5216 && sym
->result
->attr
.proc_pointer
5217 && !sym
->result
->attr
.function
)))
5219 e
->ts
.type
= BT_PROCEDURE
;
5220 goto resolve_procedure
;
5223 if (sym
->ts
.type
!= BT_UNKNOWN
)
5224 gfc_variable_attr (e
, &e
->ts
);
5225 else if (sym
->attr
.flavor
== FL_PROCEDURE
5226 && sym
->attr
.function
&& sym
->result
5227 && sym
->result
->ts
.type
!= BT_UNKNOWN
5228 && sym
->result
->attr
.proc_pointer
)
5229 e
->ts
= sym
->result
->ts
;
5232 /* Must be a simple variable reference. */
5233 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5238 if (check_assumed_size_reference (sym
, e
))
5241 /* Deal with forward references to entries during gfc_resolve_code, to
5242 satisfy, at least partially, 12.5.2.5. */
5243 if (gfc_current_ns
->entries
5244 && current_entry_id
== sym
->entry_id
5247 && cs_base
->current
->op
!= EXEC_ENTRY
)
5249 gfc_entry_list
*entry
;
5250 gfc_formal_arglist
*formal
;
5252 bool seen
, saved_specification_expr
;
5254 /* If the symbol is a dummy... */
5255 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5257 entry
= gfc_current_ns
->entries
;
5260 /* ...test if the symbol is a parameter of previous entries. */
5261 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5262 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5264 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5271 /* If it has not been seen as a dummy, this is an error. */
5274 if (specification_expr
)
5275 gfc_error ("Variable %qs, used in a specification expression"
5276 ", is referenced at %L before the ENTRY statement "
5277 "in which it is a parameter",
5278 sym
->name
, &cs_base
->current
->loc
);
5280 gfc_error ("Variable %qs is used at %L before the ENTRY "
5281 "statement in which it is a parameter",
5282 sym
->name
, &cs_base
->current
->loc
);
5287 /* Now do the same check on the specification expressions. */
5288 saved_specification_expr
= specification_expr
;
5289 specification_expr
= true;
5290 if (sym
->ts
.type
== BT_CHARACTER
5291 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5295 for (n
= 0; n
< sym
->as
->rank
; n
++)
5297 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5299 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5302 specification_expr
= saved_specification_expr
;
5305 /* Update the symbol's entry level. */
5306 sym
->entry_id
= current_entry_id
+ 1;
5309 /* If a symbol has been host_associated mark it. This is used latter,
5310 to identify if aliasing is possible via host association. */
5311 if (sym
->attr
.flavor
== FL_VARIABLE
5312 && gfc_current_ns
->parent
5313 && (gfc_current_ns
->parent
== sym
->ns
5314 || (gfc_current_ns
->parent
->parent
5315 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5316 sym
->attr
.host_assoc
= 1;
5318 if (gfc_current_ns
->proc_name
5319 && sym
->attr
.dimension
5320 && (sym
->ns
!= gfc_current_ns
5321 || sym
->attr
.use_assoc
5322 || sym
->attr
.in_common
))
5323 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5326 if (t
&& !resolve_procedure_expression (e
))
5329 /* F2008, C617 and C1229. */
5330 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5331 && gfc_is_coindexed (e
))
5333 gfc_ref
*ref
, *ref2
= NULL
;
5335 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5337 if (ref
->type
== REF_COMPONENT
)
5339 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5343 for ( ; ref
; ref
= ref
->next
)
5344 if (ref
->type
== REF_COMPONENT
)
5347 /* Expression itself is not coindexed object. */
5348 if (ref
&& e
->ts
.type
== BT_CLASS
)
5350 gfc_error ("Polymorphic subobject of coindexed object at %L",
5355 /* Expression itself is coindexed object. */
5359 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5360 for ( ; c
; c
= c
->next
)
5361 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5363 gfc_error ("Coindexed object with polymorphic allocatable "
5364 "subcomponent at %L", &e
->where
);
5372 expression_rank (e
);
5374 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5375 add_caf_get_intrinsic (e
);
5381 /* Checks to see that the correct symbol has been host associated.
5382 The only situation where this arises is that in which a twice
5383 contained function is parsed after the host association is made.
5384 Therefore, on detecting this, change the symbol in the expression
5385 and convert the array reference into an actual arglist if the old
5386 symbol is a variable. */
5388 check_host_association (gfc_expr
*e
)
5390 gfc_symbol
*sym
, *old_sym
;
5394 gfc_actual_arglist
*arg
, *tail
= NULL
;
5395 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5397 /* If the expression is the result of substitution in
5398 interface.c(gfc_extend_expr) because there is no way in
5399 which the host association can be wrong. */
5400 if (e
->symtree
== NULL
5401 || e
->symtree
->n
.sym
== NULL
5402 || e
->user_operator
)
5405 old_sym
= e
->symtree
->n
.sym
;
5407 if (gfc_current_ns
->parent
5408 && old_sym
->ns
!= gfc_current_ns
)
5410 /* Use the 'USE' name so that renamed module symbols are
5411 correctly handled. */
5412 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5414 if (sym
&& old_sym
!= sym
5415 && sym
->ts
.type
== old_sym
->ts
.type
5416 && sym
->attr
.flavor
== FL_PROCEDURE
5417 && sym
->attr
.contained
)
5419 /* Clear the shape, since it might not be valid. */
5420 gfc_free_shape (&e
->shape
, e
->rank
);
5422 /* Give the expression the right symtree! */
5423 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5424 gcc_assert (st
!= NULL
);
5426 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5427 || e
->expr_type
== EXPR_FUNCTION
)
5429 /* Original was function so point to the new symbol, since
5430 the actual argument list is already attached to the
5432 e
->value
.function
.esym
= NULL
;
5437 /* Original was variable so convert array references into
5438 an actual arglist. This does not need any checking now
5439 since resolve_function will take care of it. */
5440 e
->value
.function
.actual
= NULL
;
5441 e
->expr_type
= EXPR_FUNCTION
;
5444 /* Ambiguity will not arise if the array reference is not
5445 the last reference. */
5446 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5447 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5450 gcc_assert (ref
->type
== REF_ARRAY
);
5452 /* Grab the start expressions from the array ref and
5453 copy them into actual arguments. */
5454 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5456 arg
= gfc_get_actual_arglist ();
5457 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5458 if (e
->value
.function
.actual
== NULL
)
5459 tail
= e
->value
.function
.actual
= arg
;
5467 /* Dump the reference list and set the rank. */
5468 gfc_free_ref_list (e
->ref
);
5470 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5473 gfc_resolve_expr (e
);
5477 /* This might have changed! */
5478 return e
->expr_type
== EXPR_FUNCTION
;
5483 gfc_resolve_character_operator (gfc_expr
*e
)
5485 gfc_expr
*op1
= e
->value
.op
.op1
;
5486 gfc_expr
*op2
= e
->value
.op
.op2
;
5487 gfc_expr
*e1
= NULL
;
5488 gfc_expr
*e2
= NULL
;
5490 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5492 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5493 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5494 else if (op1
->expr_type
== EXPR_CONSTANT
)
5495 e1
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
5496 op1
->value
.character
.length
);
5498 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5499 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5500 else if (op2
->expr_type
== EXPR_CONSTANT
)
5501 e2
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
5502 op2
->value
.character
.length
);
5504 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5514 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5515 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5516 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5517 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5518 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5524 /* Ensure that an character expression has a charlen and, if possible, a
5525 length expression. */
5528 fixup_charlen (gfc_expr
*e
)
5530 /* The cases fall through so that changes in expression type and the need
5531 for multiple fixes are picked up. In all circumstances, a charlen should
5532 be available for the middle end to hang a backend_decl on. */
5533 switch (e
->expr_type
)
5536 gfc_resolve_character_operator (e
);
5540 if (e
->expr_type
== EXPR_ARRAY
)
5541 gfc_resolve_character_array_constructor (e
);
5544 case EXPR_SUBSTRING
:
5545 if (!e
->ts
.u
.cl
&& e
->ref
)
5546 gfc_resolve_substring_charlen (e
);
5551 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5558 /* Update an actual argument to include the passed-object for type-bound
5559 procedures at the right position. */
5561 static gfc_actual_arglist
*
5562 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5565 gcc_assert (argpos
> 0);
5569 gfc_actual_arglist
* result
;
5571 result
= gfc_get_actual_arglist ();
5575 result
->name
= name
;
5581 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5583 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5588 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5591 extract_compcall_passed_object (gfc_expr
* e
)
5595 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5597 if (e
->value
.compcall
.base_object
)
5598 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5601 po
= gfc_get_expr ();
5602 po
->expr_type
= EXPR_VARIABLE
;
5603 po
->symtree
= e
->symtree
;
5604 po
->ref
= gfc_copy_ref (e
->ref
);
5605 po
->where
= e
->where
;
5608 if (!gfc_resolve_expr (po
))
5615 /* Update the arglist of an EXPR_COMPCALL expression to include the
5619 update_compcall_arglist (gfc_expr
* e
)
5622 gfc_typebound_proc
* tbp
;
5624 tbp
= e
->value
.compcall
.tbp
;
5629 po
= extract_compcall_passed_object (e
);
5633 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5639 gcc_assert (tbp
->pass_arg_num
> 0);
5640 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5648 /* Extract the passed object from a PPC call (a copy of it). */
5651 extract_ppc_passed_object (gfc_expr
*e
)
5656 po
= gfc_get_expr ();
5657 po
->expr_type
= EXPR_VARIABLE
;
5658 po
->symtree
= e
->symtree
;
5659 po
->ref
= gfc_copy_ref (e
->ref
);
5660 po
->where
= e
->where
;
5662 /* Remove PPC reference. */
5664 while ((*ref
)->next
)
5665 ref
= &(*ref
)->next
;
5666 gfc_free_ref_list (*ref
);
5669 if (!gfc_resolve_expr (po
))
5676 /* Update the actual arglist of a procedure pointer component to include the
5680 update_ppc_arglist (gfc_expr
* e
)
5684 gfc_typebound_proc
* tb
;
5686 ppc
= gfc_get_proc_ptr_comp (e
);
5694 else if (tb
->nopass
)
5697 po
= extract_ppc_passed_object (e
);
5704 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5709 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5711 gfc_error ("Base object for procedure-pointer component call at %L is of"
5712 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5716 gcc_assert (tb
->pass_arg_num
> 0);
5717 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5725 /* Check that the object a TBP is called on is valid, i.e. it must not be
5726 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5729 check_typebound_baseobject (gfc_expr
* e
)
5732 bool return_value
= false;
5734 base
= extract_compcall_passed_object (e
);
5738 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5740 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5744 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5746 gfc_error ("Base object for type-bound procedure call at %L is of"
5747 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5751 /* F08:C1230. If the procedure called is NOPASS,
5752 the base object must be scalar. */
5753 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5755 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5756 " be scalar", &e
->where
);
5760 return_value
= true;
5763 gfc_free_expr (base
);
5764 return return_value
;
5768 /* Resolve a call to a type-bound procedure, either function or subroutine,
5769 statically from the data in an EXPR_COMPCALL expression. The adapted
5770 arglist and the target-procedure symtree are returned. */
5773 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5774 gfc_actual_arglist
** actual
)
5776 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5777 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5779 /* Update the actual arglist for PASS. */
5780 if (!update_compcall_arglist (e
))
5783 *actual
= e
->value
.compcall
.actual
;
5784 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5786 gfc_free_ref_list (e
->ref
);
5788 e
->value
.compcall
.actual
= NULL
;
5790 /* If we find a deferred typebound procedure, check for derived types
5791 that an overriding typebound procedure has not been missed. */
5792 if (e
->value
.compcall
.name
5793 && !e
->value
.compcall
.tbp
->non_overridable
5794 && e
->value
.compcall
.base_object
5795 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
5798 gfc_symbol
*derived
;
5800 /* Use the derived type of the base_object. */
5801 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
5804 /* If necessary, go through the inheritance chain. */
5805 while (!st
&& derived
)
5807 /* Look for the typebound procedure 'name'. */
5808 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
5809 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
5810 e
->value
.compcall
.name
);
5812 derived
= gfc_get_derived_super_type (derived
);
5815 /* Now find the specific name in the derived type namespace. */
5816 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
5817 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
5818 derived
->ns
, 1, &st
);
5826 /* Get the ultimate declared type from an expression. In addition,
5827 return the last class/derived type reference and the copy of the
5828 reference list. If check_types is set true, derived types are
5829 identified as well as class references. */
5831 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
5832 gfc_expr
*e
, bool check_types
)
5834 gfc_symbol
*declared
;
5841 *new_ref
= gfc_copy_ref (e
->ref
);
5843 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5845 if (ref
->type
!= REF_COMPONENT
)
5848 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
5849 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
5850 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
5852 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
5858 if (declared
== NULL
)
5859 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
5865 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
5866 which of the specific bindings (if any) matches the arglist and transform
5867 the expression into a call of that binding. */
5870 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
5872 gfc_typebound_proc
* genproc
;
5873 const char* genname
;
5875 gfc_symbol
*derived
;
5877 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5878 genname
= e
->value
.compcall
.name
;
5879 genproc
= e
->value
.compcall
.tbp
;
5881 if (!genproc
->is_generic
)
5884 /* Try the bindings on this type and in the inheritance hierarchy. */
5885 for (; genproc
; genproc
= genproc
->overridden
)
5889 gcc_assert (genproc
->is_generic
);
5890 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
5893 gfc_actual_arglist
* args
;
5896 gcc_assert (g
->specific
);
5898 if (g
->specific
->error
)
5901 target
= g
->specific
->u
.specific
->n
.sym
;
5903 /* Get the right arglist by handling PASS/NOPASS. */
5904 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
5905 if (!g
->specific
->nopass
)
5908 po
= extract_compcall_passed_object (e
);
5911 gfc_free_actual_arglist (args
);
5915 gcc_assert (g
->specific
->pass_arg_num
> 0);
5916 gcc_assert (!g
->specific
->error
);
5917 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
5918 g
->specific
->pass_arg
);
5920 resolve_actual_arglist (args
, target
->attr
.proc
,
5921 is_external_proc (target
)
5922 && gfc_sym_get_dummy_args (target
) == NULL
);
5924 /* Check if this arglist matches the formal. */
5925 matches
= gfc_arglist_matches_symbol (&args
, target
);
5927 /* Clean up and break out of the loop if we've found it. */
5928 gfc_free_actual_arglist (args
);
5931 e
->value
.compcall
.tbp
= g
->specific
;
5932 genname
= g
->specific_st
->name
;
5933 /* Pass along the name for CLASS methods, where the vtab
5934 procedure pointer component has to be referenced. */
5942 /* Nothing matching found! */
5943 gfc_error ("Found no matching specific binding for the call to the GENERIC"
5944 " %qs at %L", genname
, &e
->where
);
5948 /* Make sure that we have the right specific instance for the name. */
5949 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
5951 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
5953 e
->value
.compcall
.tbp
= st
->n
.tb
;
5959 /* Resolve a call to a type-bound subroutine. */
5962 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
5964 gfc_actual_arglist
* newactual
;
5965 gfc_symtree
* target
;
5967 /* Check that's really a SUBROUTINE. */
5968 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
5970 gfc_error ("%qs at %L should be a SUBROUTINE",
5971 c
->expr1
->value
.compcall
.name
, &c
->loc
);
5975 if (!check_typebound_baseobject (c
->expr1
))
5978 /* Pass along the name for CLASS methods, where the vtab
5979 procedure pointer component has to be referenced. */
5981 *name
= c
->expr1
->value
.compcall
.name
;
5983 if (!resolve_typebound_generic_call (c
->expr1
, name
))
5986 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
5988 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
5990 /* Transform into an ordinary EXEC_CALL for now. */
5992 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
5995 c
->ext
.actual
= newactual
;
5996 c
->symtree
= target
;
5997 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
5999 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6001 gfc_free_expr (c
->expr1
);
6002 c
->expr1
= gfc_get_expr ();
6003 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6004 c
->expr1
->symtree
= target
;
6005 c
->expr1
->where
= c
->loc
;
6007 return resolve_call (c
);
6011 /* Resolve a component-call expression. */
6013 resolve_compcall (gfc_expr
* e
, const char **name
)
6015 gfc_actual_arglist
* newactual
;
6016 gfc_symtree
* target
;
6018 /* Check that's really a FUNCTION. */
6019 if (!e
->value
.compcall
.tbp
->function
)
6021 gfc_error ("%qs at %L should be a FUNCTION",
6022 e
->value
.compcall
.name
, &e
->where
);
6026 /* These must not be assign-calls! */
6027 gcc_assert (!e
->value
.compcall
.assign
);
6029 if (!check_typebound_baseobject (e
))
6032 /* Pass along the name for CLASS methods, where the vtab
6033 procedure pointer component has to be referenced. */
6035 *name
= e
->value
.compcall
.name
;
6037 if (!resolve_typebound_generic_call (e
, name
))
6039 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6041 /* Take the rank from the function's symbol. */
6042 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6043 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6045 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6046 arglist to the TBP's binding target. */
6048 if (!resolve_typebound_static (e
, &target
, &newactual
))
6051 e
->value
.function
.actual
= newactual
;
6052 e
->value
.function
.name
= NULL
;
6053 e
->value
.function
.esym
= target
->n
.sym
;
6054 e
->value
.function
.isym
= NULL
;
6055 e
->symtree
= target
;
6056 e
->ts
= target
->n
.sym
->ts
;
6057 e
->expr_type
= EXPR_FUNCTION
;
6059 /* Resolution is not necessary if this is a class subroutine; this
6060 function only has to identify the specific proc. Resolution of
6061 the call will be done next in resolve_typebound_call. */
6062 return gfc_resolve_expr (e
);
6066 static bool resolve_fl_derived (gfc_symbol
*sym
);
6069 /* Resolve a typebound function, or 'method'. First separate all
6070 the non-CLASS references by calling resolve_compcall directly. */
6073 resolve_typebound_function (gfc_expr
* e
)
6075 gfc_symbol
*declared
;
6087 /* Deal with typebound operators for CLASS objects. */
6088 expr
= e
->value
.compcall
.base_object
;
6089 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6090 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6092 /* If the base_object is not a variable, the corresponding actual
6093 argument expression must be stored in e->base_expression so
6094 that the corresponding tree temporary can be used as the base
6095 object in gfc_conv_procedure_call. */
6096 if (expr
->expr_type
!= EXPR_VARIABLE
)
6098 gfc_actual_arglist
*args
;
6100 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6102 if (expr
== args
->expr
)
6107 /* Since the typebound operators are generic, we have to ensure
6108 that any delays in resolution are corrected and that the vtab
6111 declared
= ts
.u
.derived
;
6112 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6113 if (c
->ts
.u
.derived
== NULL
)
6114 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6116 if (!resolve_compcall (e
, &name
))
6119 /* Use the generic name if it is there. */
6120 name
= name
? name
: e
->value
.function
.esym
->name
;
6121 e
->symtree
= expr
->symtree
;
6122 e
->ref
= gfc_copy_ref (expr
->ref
);
6123 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6125 /* Trim away the extraneous references that emerge from nested
6126 use of interface.c (extend_expr). */
6127 if (class_ref
&& class_ref
->next
)
6129 gfc_free_ref_list (class_ref
->next
);
6130 class_ref
->next
= NULL
;
6132 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6134 gfc_free_ref_list (e
->ref
);
6138 gfc_add_vptr_component (e
);
6139 gfc_add_component_ref (e
, name
);
6140 e
->value
.function
.esym
= NULL
;
6141 if (expr
->expr_type
!= EXPR_VARIABLE
)
6142 e
->base_expr
= expr
;
6147 return resolve_compcall (e
, NULL
);
6149 if (!resolve_ref (e
))
6152 /* Get the CLASS declared type. */
6153 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6155 if (!resolve_fl_derived (declared
))
6158 /* Weed out cases of the ultimate component being a derived type. */
6159 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6160 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6162 gfc_free_ref_list (new_ref
);
6163 return resolve_compcall (e
, NULL
);
6166 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6167 declared
= c
->ts
.u
.derived
;
6169 /* Treat the call as if it is a typebound procedure, in order to roll
6170 out the correct name for the specific function. */
6171 if (!resolve_compcall (e
, &name
))
6173 gfc_free_ref_list (new_ref
);
6180 /* Convert the expression to a procedure pointer component call. */
6181 e
->value
.function
.esym
= NULL
;
6187 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6188 gfc_add_vptr_component (e
);
6189 gfc_add_component_ref (e
, name
);
6191 /* Recover the typespec for the expression. This is really only
6192 necessary for generic procedures, where the additional call
6193 to gfc_add_component_ref seems to throw the collection of the
6194 correct typespec. */
6198 gfc_free_ref_list (new_ref
);
6203 /* Resolve a typebound subroutine, or 'method'. First separate all
6204 the non-CLASS references by calling resolve_typebound_call
6208 resolve_typebound_subroutine (gfc_code
*code
)
6210 gfc_symbol
*declared
;
6220 st
= code
->expr1
->symtree
;
6222 /* Deal with typebound operators for CLASS objects. */
6223 expr
= code
->expr1
->value
.compcall
.base_object
;
6224 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6225 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6227 /* If the base_object is not a variable, the corresponding actual
6228 argument expression must be stored in e->base_expression so
6229 that the corresponding tree temporary can be used as the base
6230 object in gfc_conv_procedure_call. */
6231 if (expr
->expr_type
!= EXPR_VARIABLE
)
6233 gfc_actual_arglist
*args
;
6235 args
= code
->expr1
->value
.function
.actual
;
6236 for (; args
; args
= args
->next
)
6237 if (expr
== args
->expr
)
6241 /* Since the typebound operators are generic, we have to ensure
6242 that any delays in resolution are corrected and that the vtab
6244 declared
= expr
->ts
.u
.derived
;
6245 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6246 if (c
->ts
.u
.derived
== NULL
)
6247 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6249 if (!resolve_typebound_call (code
, &name
, NULL
))
6252 /* Use the generic name if it is there. */
6253 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6254 code
->expr1
->symtree
= expr
->symtree
;
6255 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6257 /* Trim away the extraneous references that emerge from nested
6258 use of interface.c (extend_expr). */
6259 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6260 if (class_ref
&& class_ref
->next
)
6262 gfc_free_ref_list (class_ref
->next
);
6263 class_ref
->next
= NULL
;
6265 else if (code
->expr1
->ref
&& !class_ref
)
6267 gfc_free_ref_list (code
->expr1
->ref
);
6268 code
->expr1
->ref
= NULL
;
6271 /* Now use the procedure in the vtable. */
6272 gfc_add_vptr_component (code
->expr1
);
6273 gfc_add_component_ref (code
->expr1
, name
);
6274 code
->expr1
->value
.function
.esym
= NULL
;
6275 if (expr
->expr_type
!= EXPR_VARIABLE
)
6276 code
->expr1
->base_expr
= expr
;
6281 return resolve_typebound_call (code
, NULL
, NULL
);
6283 if (!resolve_ref (code
->expr1
))
6286 /* Get the CLASS declared type. */
6287 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6289 /* Weed out cases of the ultimate component being a derived type. */
6290 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6291 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6293 gfc_free_ref_list (new_ref
);
6294 return resolve_typebound_call (code
, NULL
, NULL
);
6297 if (!resolve_typebound_call (code
, &name
, &overridable
))
6299 gfc_free_ref_list (new_ref
);
6302 ts
= code
->expr1
->ts
;
6306 /* Convert the expression to a procedure pointer component call. */
6307 code
->expr1
->value
.function
.esym
= NULL
;
6308 code
->expr1
->symtree
= st
;
6311 code
->expr1
->ref
= new_ref
;
6313 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6314 gfc_add_vptr_component (code
->expr1
);
6315 gfc_add_component_ref (code
->expr1
, name
);
6317 /* Recover the typespec for the expression. This is really only
6318 necessary for generic procedures, where the additional call
6319 to gfc_add_component_ref seems to throw the collection of the
6320 correct typespec. */
6321 code
->expr1
->ts
= ts
;
6324 gfc_free_ref_list (new_ref
);
6330 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6333 resolve_ppc_call (gfc_code
* c
)
6335 gfc_component
*comp
;
6337 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6338 gcc_assert (comp
!= NULL
);
6340 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6341 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6343 if (!comp
->attr
.subroutine
)
6344 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6346 if (!resolve_ref (c
->expr1
))
6349 if (!update_ppc_arglist (c
->expr1
))
6352 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6354 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6355 !(comp
->ts
.interface
6356 && comp
->ts
.interface
->formal
)))
6359 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6362 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6368 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6371 resolve_expr_ppc (gfc_expr
* e
)
6373 gfc_component
*comp
;
6375 comp
= gfc_get_proc_ptr_comp (e
);
6376 gcc_assert (comp
!= NULL
);
6378 /* Convert to EXPR_FUNCTION. */
6379 e
->expr_type
= EXPR_FUNCTION
;
6380 e
->value
.function
.isym
= NULL
;
6381 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6383 if (comp
->as
!= NULL
)
6384 e
->rank
= comp
->as
->rank
;
6386 if (!comp
->attr
.function
)
6387 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6389 if (!resolve_ref (e
))
6392 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6393 !(comp
->ts
.interface
6394 && comp
->ts
.interface
->formal
)))
6397 if (!update_ppc_arglist (e
))
6400 if (!check_pure_function(e
))
6403 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6410 gfc_is_expandable_expr (gfc_expr
*e
)
6412 gfc_constructor
*con
;
6414 if (e
->expr_type
== EXPR_ARRAY
)
6416 /* Traverse the constructor looking for variables that are flavor
6417 parameter. Parameters must be expanded since they are fully used at
6419 con
= gfc_constructor_first (e
->value
.constructor
);
6420 for (; con
; con
= gfc_constructor_next (con
))
6422 if (con
->expr
->expr_type
== EXPR_VARIABLE
6423 && con
->expr
->symtree
6424 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6425 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6427 if (con
->expr
->expr_type
== EXPR_ARRAY
6428 && gfc_is_expandable_expr (con
->expr
))
6436 /* Resolve an expression. That is, make sure that types of operands agree
6437 with their operators, intrinsic operators are converted to function calls
6438 for overloaded types and unresolved function references are resolved. */
6441 gfc_resolve_expr (gfc_expr
*e
)
6444 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6449 /* inquiry_argument only applies to variables. */
6450 inquiry_save
= inquiry_argument
;
6451 actual_arg_save
= actual_arg
;
6452 first_actual_arg_save
= first_actual_arg
;
6454 if (e
->expr_type
!= EXPR_VARIABLE
)
6456 inquiry_argument
= false;
6458 first_actual_arg
= false;
6461 switch (e
->expr_type
)
6464 t
= resolve_operator (e
);
6470 if (check_host_association (e
))
6471 t
= resolve_function (e
);
6473 t
= resolve_variable (e
);
6475 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6476 && e
->ref
->type
!= REF_SUBSTRING
)
6477 gfc_resolve_substring_charlen (e
);
6482 t
= resolve_typebound_function (e
);
6485 case EXPR_SUBSTRING
:
6486 t
= resolve_ref (e
);
6495 t
= resolve_expr_ppc (e
);
6500 if (!resolve_ref (e
))
6503 t
= gfc_resolve_array_constructor (e
);
6504 /* Also try to expand a constructor. */
6507 expression_rank (e
);
6508 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6509 gfc_expand_constructor (e
, false);
6512 /* This provides the opportunity for the length of constructors with
6513 character valued function elements to propagate the string length
6514 to the expression. */
6515 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6517 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6518 here rather then add a duplicate test for it above. */
6519 gfc_expand_constructor (e
, false);
6520 t
= gfc_resolve_character_array_constructor (e
);
6525 case EXPR_STRUCTURE
:
6526 t
= resolve_ref (e
);
6530 t
= resolve_structure_cons (e
, 0);
6534 t
= gfc_simplify_expr (e
, 0);
6538 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6541 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6544 inquiry_argument
= inquiry_save
;
6545 actual_arg
= actual_arg_save
;
6546 first_actual_arg
= first_actual_arg_save
;
6552 /* Resolve an expression from an iterator. They must be scalar and have
6553 INTEGER or (optionally) REAL type. */
6556 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6557 const char *name_msgid
)
6559 if (!gfc_resolve_expr (expr
))
6562 if (expr
->rank
!= 0)
6564 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6568 if (expr
->ts
.type
!= BT_INTEGER
)
6570 if (expr
->ts
.type
== BT_REAL
)
6573 return gfc_notify_std (GFC_STD_F95_DEL
,
6574 "%s at %L must be integer",
6575 _(name_msgid
), &expr
->where
);
6578 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6585 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6593 /* Resolve the expressions in an iterator structure. If REAL_OK is
6594 false allow only INTEGER type iterators, otherwise allow REAL types.
6595 Set own_scope to true for ac-implied-do and data-implied-do as those
6596 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6599 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6601 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6604 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6605 _("iterator variable")))
6608 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6609 "Start expression in DO loop"))
6612 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6613 "End expression in DO loop"))
6616 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6617 "Step expression in DO loop"))
6620 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6622 if ((iter
->step
->ts
.type
== BT_INTEGER
6623 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6624 || (iter
->step
->ts
.type
== BT_REAL
6625 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6627 gfc_error ("Step expression in DO loop at %L cannot be zero",
6628 &iter
->step
->where
);
6633 /* Convert start, end, and step to the same type as var. */
6634 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6635 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6636 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6638 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6639 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6640 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6642 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6643 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6644 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6646 if (iter
->start
->expr_type
== EXPR_CONSTANT
6647 && iter
->end
->expr_type
== EXPR_CONSTANT
6648 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6651 if (iter
->start
->ts
.type
== BT_INTEGER
)
6653 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6654 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6658 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6659 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6661 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6662 gfc_warning (OPT_Wzerotrip
,
6663 "DO loop at %L will be executed zero times",
6664 &iter
->step
->where
);
6667 if (iter
->end
->expr_type
== EXPR_CONSTANT
6668 && iter
->end
->ts
.type
== BT_INTEGER
6669 && iter
->step
->expr_type
== EXPR_CONSTANT
6670 && iter
->step
->ts
.type
== BT_INTEGER
6671 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6672 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6674 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6675 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6677 if (is_step_positive
6678 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6679 gfc_warning (OPT_Wundefined_do_loop
,
6680 "DO loop at %L is undefined as it overflows",
6681 &iter
->step
->where
);
6682 else if (!is_step_positive
6683 && mpz_cmp (iter
->end
->value
.integer
,
6684 gfc_integer_kinds
[k
].min_int
) == 0)
6685 gfc_warning (OPT_Wundefined_do_loop
,
6686 "DO loop at %L is undefined as it underflows",
6687 &iter
->step
->where
);
6694 /* Traversal function for find_forall_index. f == 2 signals that
6695 that variable itself is not to be checked - only the references. */
6698 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6700 if (expr
->expr_type
!= EXPR_VARIABLE
)
6703 /* A scalar assignment */
6704 if (!expr
->ref
|| *f
== 1)
6706 if (expr
->symtree
->n
.sym
== sym
)
6718 /* Check whether the FORALL index appears in the expression or not.
6719 Returns true if SYM is found in EXPR. */
6722 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6724 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6731 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6732 to be a scalar INTEGER variable. The subscripts and stride are scalar
6733 INTEGERs, and if stride is a constant it must be nonzero.
6734 Furthermore "A subscript or stride in a forall-triplet-spec shall
6735 not contain a reference to any index-name in the
6736 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6739 resolve_forall_iterators (gfc_forall_iterator
*it
)
6741 gfc_forall_iterator
*iter
, *iter2
;
6743 for (iter
= it
; iter
; iter
= iter
->next
)
6745 if (gfc_resolve_expr (iter
->var
)
6746 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6747 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6750 if (gfc_resolve_expr (iter
->start
)
6751 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
6752 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
6753 &iter
->start
->where
);
6754 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6755 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6757 if (gfc_resolve_expr (iter
->end
)
6758 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6759 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6761 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
6762 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6764 if (gfc_resolve_expr (iter
->stride
))
6766 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
6767 gfc_error ("FORALL stride expression at %L must be a scalar %s",
6768 &iter
->stride
->where
, "INTEGER");
6770 if (iter
->stride
->expr_type
== EXPR_CONSTANT
6771 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
6772 gfc_error ("FORALL stride expression at %L cannot be zero",
6773 &iter
->stride
->where
);
6775 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
6776 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
6779 for (iter
= it
; iter
; iter
= iter
->next
)
6780 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
6782 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
6783 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
6784 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
6785 gfc_error ("FORALL index %qs may not appear in triplet "
6786 "specification at %L", iter
->var
->symtree
->name
,
6787 &iter2
->start
->where
);
6792 /* Given a pointer to a symbol that is a derived type, see if it's
6793 inaccessible, i.e. if it's defined in another module and the components are
6794 PRIVATE. The search is recursive if necessary. Returns zero if no
6795 inaccessible components are found, nonzero otherwise. */
6798 derived_inaccessible (gfc_symbol
*sym
)
6802 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
6805 for (c
= sym
->components
; c
; c
= c
->next
)
6807 /* Prevent an infinite loop through this function. */
6808 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
6809 && sym
== c
->ts
.u
.derived
)
6812 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
6820 /* Resolve the argument of a deallocate expression. The expression must be
6821 a pointer or a full array. */
6824 resolve_deallocate_expr (gfc_expr
*e
)
6826 symbol_attribute attr
;
6827 int allocatable
, pointer
;
6833 if (!gfc_resolve_expr (e
))
6836 if (e
->expr_type
!= EXPR_VARIABLE
)
6839 sym
= e
->symtree
->n
.sym
;
6840 unlimited
= UNLIMITED_POLY(sym
);
6842 if (sym
->ts
.type
== BT_CLASS
)
6844 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
6845 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
6849 allocatable
= sym
->attr
.allocatable
;
6850 pointer
= sym
->attr
.pointer
;
6852 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6857 if (ref
->u
.ar
.type
!= AR_FULL
6858 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
6859 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
6864 c
= ref
->u
.c
.component
;
6865 if (c
->ts
.type
== BT_CLASS
)
6867 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
6868 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
6872 allocatable
= c
->attr
.allocatable
;
6873 pointer
= c
->attr
.pointer
;
6883 attr
= gfc_expr_attr (e
);
6885 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
6888 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
6894 if (gfc_is_coindexed (e
))
6896 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
6901 && !gfc_check_vardef_context (e
, true, true, false,
6902 _("DEALLOCATE object")))
6904 if (!gfc_check_vardef_context (e
, false, true, false,
6905 _("DEALLOCATE object")))
6912 /* Returns true if the expression e contains a reference to the symbol sym. */
6914 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
6916 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
6923 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
6925 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
6929 /* Given the expression node e for an allocatable/pointer of derived type to be
6930 allocated, get the expression node to be initialized afterwards (needed for
6931 derived types with default initializers, and derived types with allocatable
6932 components that need nullification.) */
6935 gfc_expr_to_initialize (gfc_expr
*e
)
6941 result
= gfc_copy_expr (e
);
6943 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
6944 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
6945 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
6947 ref
->u
.ar
.type
= AR_FULL
;
6949 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
6950 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
6955 gfc_free_shape (&result
->shape
, result
->rank
);
6957 /* Recalculate rank, shape, etc. */
6958 gfc_resolve_expr (result
);
6963 /* If the last ref of an expression is an array ref, return a copy of the
6964 expression with that one removed. Otherwise, a copy of the original
6965 expression. This is used for allocate-expressions and pointer assignment
6966 LHS, where there may be an array specification that needs to be stripped
6967 off when using gfc_check_vardef_context. */
6970 remove_last_array_ref (gfc_expr
* e
)
6975 e2
= gfc_copy_expr (e
);
6976 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
6977 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
6979 gfc_free_ref_list (*r
);
6988 /* Used in resolve_allocate_expr to check that a allocation-object and
6989 a source-expr are conformable. This does not catch all possible
6990 cases; in particular a runtime checking is needed. */
6993 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
6996 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
6998 /* First compare rank. */
6999 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7000 || (!tail
&& e1
->rank
!= e2
->rank
))
7002 gfc_error ("Source-expr at %L must be scalar or have the "
7003 "same rank as the allocate-object at %L",
7004 &e1
->where
, &e2
->where
);
7015 for (i
= 0; i
< e1
->rank
; i
++)
7017 if (tail
->u
.ar
.start
[i
] == NULL
)
7020 if (tail
->u
.ar
.end
[i
])
7022 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7023 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7024 mpz_add_ui (s
, s
, 1);
7028 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7031 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7033 gfc_error ("Source-expr at %L and allocate-object at %L must "
7034 "have the same shape", &e1
->where
, &e2
->where
);
7047 /* Resolve the expression in an ALLOCATE statement, doing the additional
7048 checks to see whether the expression is OK or not. The expression must
7049 have a trailing array reference that gives the size of the array. */
7052 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7054 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7058 symbol_attribute attr
;
7059 gfc_ref
*ref
, *ref2
;
7062 gfc_symbol
*sym
= NULL
;
7067 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7068 checking of coarrays. */
7069 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7070 if (ref
->next
== NULL
)
7073 if (ref
&& ref
->type
== REF_ARRAY
)
7074 ref
->u
.ar
.in_allocate
= true;
7076 if (!gfc_resolve_expr (e
))
7079 /* Make sure the expression is allocatable or a pointer. If it is
7080 pointer, the next-to-last reference must be a pointer. */
7084 sym
= e
->symtree
->n
.sym
;
7086 /* Check whether ultimate component is abstract and CLASS. */
7089 /* Is the allocate-object unlimited polymorphic? */
7090 unlimited
= UNLIMITED_POLY(e
);
7092 if (e
->expr_type
!= EXPR_VARIABLE
)
7095 attr
= gfc_expr_attr (e
);
7096 pointer
= attr
.pointer
;
7097 dimension
= attr
.dimension
;
7098 codimension
= attr
.codimension
;
7102 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7104 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7105 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7106 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7107 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7108 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7112 allocatable
= sym
->attr
.allocatable
;
7113 pointer
= sym
->attr
.pointer
;
7114 dimension
= sym
->attr
.dimension
;
7115 codimension
= sym
->attr
.codimension
;
7120 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7125 if (ref
->u
.ar
.codimen
> 0)
7128 for (n
= ref
->u
.ar
.dimen
;
7129 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7130 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7137 if (ref
->next
!= NULL
)
7145 gfc_error ("Coindexed allocatable object at %L",
7150 c
= ref
->u
.c
.component
;
7151 if (c
->ts
.type
== BT_CLASS
)
7153 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7154 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7155 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7156 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7157 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7161 allocatable
= c
->attr
.allocatable
;
7162 pointer
= c
->attr
.pointer
;
7163 dimension
= c
->attr
.dimension
;
7164 codimension
= c
->attr
.codimension
;
7165 is_abstract
= c
->attr
.abstract
;
7177 /* Check for F08:C628. */
7178 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7180 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7185 /* Some checks for the SOURCE tag. */
7188 /* Check F03:C631. */
7189 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7191 gfc_error ("Type of entity at %L is type incompatible with "
7192 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7196 /* Check F03:C632 and restriction following Note 6.18. */
7197 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7200 /* Check F03:C633. */
7201 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7203 gfc_error ("The allocate-object at %L and the source-expr at %L "
7204 "shall have the same kind type parameter",
7205 &e
->where
, &code
->expr3
->where
);
7209 /* Check F2008, C642. */
7210 if (code
->expr3
->ts
.type
== BT_DERIVED
7211 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7212 || (code
->expr3
->ts
.u
.derived
->from_intmod
7213 == INTMOD_ISO_FORTRAN_ENV
7214 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7215 == ISOFORTRAN_LOCK_TYPE
)))
7217 gfc_error ("The source-expr at %L shall neither be of type "
7218 "LOCK_TYPE nor have a LOCK_TYPE component if "
7219 "allocate-object at %L is a coarray",
7220 &code
->expr3
->where
, &e
->where
);
7224 /* Check TS18508, C702/C703. */
7225 if (code
->expr3
->ts
.type
== BT_DERIVED
7226 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7227 || (code
->expr3
->ts
.u
.derived
->from_intmod
7228 == INTMOD_ISO_FORTRAN_ENV
7229 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7230 == ISOFORTRAN_EVENT_TYPE
)))
7232 gfc_error ("The source-expr at %L shall neither be of type "
7233 "EVENT_TYPE nor have a EVENT_TYPE component if "
7234 "allocate-object at %L is a coarray",
7235 &code
->expr3
->where
, &e
->where
);
7240 /* Check F08:C629. */
7241 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7244 gcc_assert (e
->ts
.type
== BT_CLASS
);
7245 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7246 "type-spec or source-expr", sym
->name
, &e
->where
);
7250 /* Check F08:C632. */
7251 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7252 && !UNLIMITED_POLY (e
))
7254 int cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7255 code
->ext
.alloc
.ts
.u
.cl
->length
);
7256 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7258 gfc_error ("Allocating %s at %L with type-spec requires the same "
7259 "character-length parameter as in the declaration",
7260 sym
->name
, &e
->where
);
7265 /* In the variable definition context checks, gfc_expr_attr is used
7266 on the expression. This is fooled by the array specification
7267 present in e, thus we have to eliminate that one temporarily. */
7268 e2
= remove_last_array_ref (e
);
7271 t
= gfc_check_vardef_context (e2
, true, true, false,
7272 _("ALLOCATE object"));
7274 t
= gfc_check_vardef_context (e2
, false, true, false,
7275 _("ALLOCATE object"));
7280 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7281 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7283 /* For class arrays, the initialization with SOURCE is done
7284 using _copy and trans_call. It is convenient to exploit that
7285 when the allocated type is different from the declared type but
7286 no SOURCE exists by setting expr3. */
7287 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7289 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7290 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7291 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7293 /* We have to zero initialize the integer variable. */
7294 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7297 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7299 /* Make sure the vtab symbol is present when
7300 the module variables are generated. */
7301 gfc_typespec ts
= e
->ts
;
7303 ts
= code
->expr3
->ts
;
7304 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7305 ts
= code
->ext
.alloc
.ts
;
7307 /* Finding the vtab also publishes the type's symbol. Therefore this
7308 statement is necessary. */
7309 gfc_find_derived_vtab (ts
.u
.derived
);
7311 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7313 /* Again, make sure the vtab symbol is present when
7314 the module variables are generated. */
7315 gfc_typespec
*ts
= NULL
;
7317 ts
= &code
->expr3
->ts
;
7319 ts
= &code
->ext
.alloc
.ts
;
7323 /* Finding the vtab also publishes the type's symbol. Therefore this
7324 statement is necessary. */
7328 if (dimension
== 0 && codimension
== 0)
7331 /* Make sure the last reference node is an array specification. */
7333 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7334 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7339 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7340 "in ALLOCATE statement at %L", &e
->where
))
7342 if (code
->expr3
->rank
!= 0)
7343 *array_alloc_wo_spec
= true;
7346 gfc_error ("Array specification or array-valued SOURCE= "
7347 "expression required in ALLOCATE statement at %L",
7354 gfc_error ("Array specification required in ALLOCATE statement "
7355 "at %L", &e
->where
);
7360 /* Make sure that the array section reference makes sense in the
7361 context of an ALLOCATE specification. */
7366 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7367 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7369 gfc_error ("Coarray specification required in ALLOCATE statement "
7370 "at %L", &e
->where
);
7374 for (i
= 0; i
< ar
->dimen
; i
++)
7376 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7379 switch (ar
->dimen_type
[i
])
7385 if (ar
->start
[i
] != NULL
7386 && ar
->end
[i
] != NULL
7387 && ar
->stride
[i
] == NULL
)
7395 case DIMEN_THIS_IMAGE
:
7396 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7402 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7404 sym
= a
->expr
->symtree
->n
.sym
;
7406 /* TODO - check derived type components. */
7407 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7410 if ((ar
->start
[i
] != NULL
7411 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7412 || (ar
->end
[i
] != NULL
7413 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7415 gfc_error ("%qs must not appear in the array specification at "
7416 "%L in the same ALLOCATE statement where it is "
7417 "itself allocated", sym
->name
, &ar
->where
);
7423 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7425 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7426 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7428 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7430 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7431 "statement at %L", &e
->where
);
7437 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7438 && ar
->stride
[i
] == NULL
)
7441 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7455 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7457 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7458 gfc_alloc
*a
, *p
, *q
;
7461 errmsg
= code
->expr2
;
7463 /* Check the stat variable. */
7466 gfc_check_vardef_context (stat
, false, false, false,
7467 _("STAT variable"));
7469 if ((stat
->ts
.type
!= BT_INTEGER
7470 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7471 || stat
->ref
->type
== REF_COMPONENT
)))
7473 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7474 "variable", &stat
->where
);
7476 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7477 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7479 gfc_ref
*ref1
, *ref2
;
7482 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7483 ref1
= ref1
->next
, ref2
= ref2
->next
)
7485 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7487 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7496 gfc_error ("Stat-variable at %L shall not be %sd within "
7497 "the same %s statement", &stat
->where
, fcn
, fcn
);
7503 /* Check the errmsg variable. */
7507 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7510 gfc_check_vardef_context (errmsg
, false, false, false,
7511 _("ERRMSG variable"));
7513 if ((errmsg
->ts
.type
!= BT_CHARACTER
7515 && (errmsg
->ref
->type
== REF_ARRAY
7516 || errmsg
->ref
->type
== REF_COMPONENT
)))
7517 || errmsg
->rank
> 0 )
7518 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7519 "variable", &errmsg
->where
);
7521 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7522 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7524 gfc_ref
*ref1
, *ref2
;
7527 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7528 ref1
= ref1
->next
, ref2
= ref2
->next
)
7530 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7532 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7541 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7542 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7548 /* Check that an allocate-object appears only once in the statement. */
7550 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7553 for (q
= p
->next
; q
; q
= q
->next
)
7556 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7558 /* This is a potential collision. */
7559 gfc_ref
*pr
= pe
->ref
;
7560 gfc_ref
*qr
= qe
->ref
;
7562 /* Follow the references until
7563 a) They start to differ, in which case there is no error;
7564 you can deallocate a%b and a%c in a single statement
7565 b) Both of them stop, which is an error
7566 c) One of them stops, which is also an error. */
7569 if (pr
== NULL
&& qr
== NULL
)
7571 gfc_error ("Allocate-object at %L also appears at %L",
7572 &pe
->where
, &qe
->where
);
7575 else if (pr
!= NULL
&& qr
== NULL
)
7577 gfc_error ("Allocate-object at %L is subobject of"
7578 " object at %L", &pe
->where
, &qe
->where
);
7581 else if (pr
== NULL
&& qr
!= NULL
)
7583 gfc_error ("Allocate-object at %L is subobject of"
7584 " object at %L", &qe
->where
, &pe
->where
);
7587 /* Here, pr != NULL && qr != NULL */
7588 gcc_assert(pr
->type
== qr
->type
);
7589 if (pr
->type
== REF_ARRAY
)
7591 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7593 gcc_assert (qr
->type
== REF_ARRAY
);
7595 if (pr
->next
&& qr
->next
)
7598 gfc_array_ref
*par
= &(pr
->u
.ar
);
7599 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7601 for (i
=0; i
<par
->dimen
; i
++)
7603 if ((par
->start
[i
] != NULL
7604 || qar
->start
[i
] != NULL
)
7605 && gfc_dep_compare_expr (par
->start
[i
],
7606 qar
->start
[i
]) != 0)
7613 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7626 if (strcmp (fcn
, "ALLOCATE") == 0)
7628 bool arr_alloc_wo_spec
= false;
7630 /* Resolving the expr3 in the loop over all objects to allocate would
7631 execute loop invariant code for each loop item. Therefore do it just
7633 if (code
->expr3
&& code
->expr3
->mold
7634 && code
->expr3
->ts
.type
== BT_DERIVED
)
7636 /* Default initialization via MOLD (non-polymorphic). */
7637 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7640 gfc_resolve_expr (rhs
);
7641 gfc_free_expr (code
->expr3
);
7645 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7646 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7648 if (arr_alloc_wo_spec
&& code
->expr3
)
7650 /* Mark the allocate to have to take the array specification
7652 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7657 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7658 resolve_deallocate_expr (a
->expr
);
7663 /************ SELECT CASE resolution subroutines ************/
7665 /* Callback function for our mergesort variant. Determines interval
7666 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7667 op1 > op2. Assumes we're not dealing with the default case.
7668 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7669 There are nine situations to check. */
7672 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7676 if (op1
->low
== NULL
) /* op1 = (:L) */
7678 /* op2 = (:N), so overlap. */
7680 /* op2 = (M:) or (M:N), L < M */
7681 if (op2
->low
!= NULL
7682 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7685 else if (op1
->high
== NULL
) /* op1 = (K:) */
7687 /* op2 = (M:), so overlap. */
7689 /* op2 = (:N) or (M:N), K > N */
7690 if (op2
->high
!= NULL
7691 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7694 else /* op1 = (K:L) */
7696 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7697 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7699 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7700 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7702 else /* op2 = (M:N) */
7706 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7709 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7718 /* Merge-sort a double linked case list, detecting overlap in the
7719 process. LIST is the head of the double linked case list before it
7720 is sorted. Returns the head of the sorted list if we don't see any
7721 overlap, or NULL otherwise. */
7724 check_case_overlap (gfc_case
*list
)
7726 gfc_case
*p
, *q
, *e
, *tail
;
7727 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7729 /* If the passed list was empty, return immediately. */
7736 /* Loop unconditionally. The only exit from this loop is a return
7737 statement, when we've finished sorting the case list. */
7744 /* Count the number of merges we do in this pass. */
7747 /* Loop while there exists a merge to be done. */
7752 /* Count this merge. */
7755 /* Cut the list in two pieces by stepping INSIZE places
7756 forward in the list, starting from P. */
7759 for (i
= 0; i
< insize
; i
++)
7768 /* Now we have two lists. Merge them! */
7769 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
7771 /* See from which the next case to merge comes from. */
7774 /* P is empty so the next case must come from Q. */
7779 else if (qsize
== 0 || q
== NULL
)
7788 cmp
= compare_cases (p
, q
);
7791 /* The whole case range for P is less than the
7799 /* The whole case range for Q is greater than
7800 the case range for P. */
7807 /* The cases overlap, or they are the same
7808 element in the list. Either way, we must
7809 issue an error and get the next case from P. */
7810 /* FIXME: Sort P and Q by line number. */
7811 gfc_error ("CASE label at %L overlaps with CASE "
7812 "label at %L", &p
->where
, &q
->where
);
7820 /* Add the next element to the merged list. */
7829 /* P has now stepped INSIZE places along, and so has Q. So
7830 they're the same. */
7835 /* If we have done only one merge or none at all, we've
7836 finished sorting the cases. */
7845 /* Otherwise repeat, merging lists twice the size. */
7851 /* Check to see if an expression is suitable for use in a CASE statement.
7852 Makes sure that all case expressions are scalar constants of the same
7853 type. Return false if anything is wrong. */
7856 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
7858 if (e
== NULL
) return true;
7860 if (e
->ts
.type
!= case_expr
->ts
.type
)
7862 gfc_error ("Expression in CASE statement at %L must be of type %s",
7863 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
7867 /* C805 (R808) For a given case-construct, each case-value shall be of
7868 the same type as case-expr. For character type, length differences
7869 are allowed, but the kind type parameters shall be the same. */
7871 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
7873 gfc_error ("Expression in CASE statement at %L must be of kind %d",
7874 &e
->where
, case_expr
->ts
.kind
);
7878 /* Convert the case value kind to that of case expression kind,
7881 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
7882 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
7886 gfc_error ("Expression in CASE statement at %L must be scalar",
7895 /* Given a completely parsed select statement, we:
7897 - Validate all expressions and code within the SELECT.
7898 - Make sure that the selection expression is not of the wrong type.
7899 - Make sure that no case ranges overlap.
7900 - Eliminate unreachable cases and unreachable code resulting from
7901 removing case labels.
7903 The standard does allow unreachable cases, e.g. CASE (5:3). But
7904 they are a hassle for code generation, and to prevent that, we just
7905 cut them out here. This is not necessary for overlapping cases
7906 because they are illegal and we never even try to generate code.
7908 We have the additional caveat that a SELECT construct could have
7909 been a computed GOTO in the source code. Fortunately we can fairly
7910 easily work around that here: The case_expr for a "real" SELECT CASE
7911 is in code->expr1, but for a computed GOTO it is in code->expr2. All
7912 we have to do is make sure that the case_expr is a scalar integer
7916 resolve_select (gfc_code
*code
, bool select_type
)
7919 gfc_expr
*case_expr
;
7920 gfc_case
*cp
, *default_case
, *tail
, *head
;
7921 int seen_unreachable
;
7927 if (code
->expr1
== NULL
)
7929 /* This was actually a computed GOTO statement. */
7930 case_expr
= code
->expr2
;
7931 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
7932 gfc_error ("Selection expression in computed GOTO statement "
7933 "at %L must be a scalar integer expression",
7936 /* Further checking is not necessary because this SELECT was built
7937 by the compiler, so it should always be OK. Just move the
7938 case_expr from expr2 to expr so that we can handle computed
7939 GOTOs as normal SELECTs from here on. */
7940 code
->expr1
= code
->expr2
;
7945 case_expr
= code
->expr1
;
7946 type
= case_expr
->ts
.type
;
7949 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
7951 gfc_error ("Argument of SELECT statement at %L cannot be %s",
7952 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
7954 /* Punt. Going on here just produce more garbage error messages. */
7959 if (!select_type
&& case_expr
->rank
!= 0)
7961 gfc_error ("Argument of SELECT statement at %L must be a scalar "
7962 "expression", &case_expr
->where
);
7968 /* Raise a warning if an INTEGER case value exceeds the range of
7969 the case-expr. Later, all expressions will be promoted to the
7970 largest kind of all case-labels. */
7972 if (type
== BT_INTEGER
)
7973 for (body
= code
->block
; body
; body
= body
->block
)
7974 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
7977 && gfc_check_integer_range (cp
->low
->value
.integer
,
7978 case_expr
->ts
.kind
) != ARITH_OK
)
7979 gfc_warning (0, "Expression in CASE statement at %L is "
7980 "not in the range of %s", &cp
->low
->where
,
7981 gfc_typename (&case_expr
->ts
));
7984 && cp
->low
!= cp
->high
7985 && gfc_check_integer_range (cp
->high
->value
.integer
,
7986 case_expr
->ts
.kind
) != ARITH_OK
)
7987 gfc_warning (0, "Expression in CASE statement at %L is "
7988 "not in the range of %s", &cp
->high
->where
,
7989 gfc_typename (&case_expr
->ts
));
7992 /* PR 19168 has a long discussion concerning a mismatch of the kinds
7993 of the SELECT CASE expression and its CASE values. Walk the lists
7994 of case values, and if we find a mismatch, promote case_expr to
7995 the appropriate kind. */
7997 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
7999 for (body
= code
->block
; body
; body
= body
->block
)
8001 /* Walk the case label list. */
8002 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8004 /* Intercept the DEFAULT case. It does not have a kind. */
8005 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8008 /* Unreachable case ranges are discarded, so ignore. */
8009 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8010 && cp
->low
!= cp
->high
8011 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8015 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8016 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8018 if (cp
->high
!= NULL
8019 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8020 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8025 /* Assume there is no DEFAULT case. */
8026 default_case
= NULL
;
8031 for (body
= code
->block
; body
; body
= body
->block
)
8033 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8035 seen_unreachable
= 0;
8037 /* Walk the case label list, making sure that all case labels
8039 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8041 /* Count the number of cases in the whole construct. */
8044 /* Intercept the DEFAULT case. */
8045 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8047 if (default_case
!= NULL
)
8049 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8050 "by a second DEFAULT CASE at %L",
8051 &default_case
->where
, &cp
->where
);
8062 /* Deal with single value cases and case ranges. Errors are
8063 issued from the validation function. */
8064 if (!validate_case_label_expr (cp
->low
, case_expr
)
8065 || !validate_case_label_expr (cp
->high
, case_expr
))
8071 if (type
== BT_LOGICAL
8072 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8073 || cp
->low
!= cp
->high
))
8075 gfc_error ("Logical range in CASE statement at %L is not "
8076 "allowed", &cp
->low
->where
);
8081 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8084 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8085 if (value
& seen_logical
)
8087 gfc_error ("Constant logical value in CASE statement "
8088 "is repeated at %L",
8093 seen_logical
|= value
;
8096 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8097 && cp
->low
!= cp
->high
8098 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8100 if (warn_surprising
)
8101 gfc_warning (OPT_Wsurprising
,
8102 "Range specification at %L can never be matched",
8105 cp
->unreachable
= 1;
8106 seen_unreachable
= 1;
8110 /* If the case range can be matched, it can also overlap with
8111 other cases. To make sure it does not, we put it in a
8112 double linked list here. We sort that with a merge sort
8113 later on to detect any overlapping cases. */
8117 head
->right
= head
->left
= NULL
;
8122 tail
->right
->left
= tail
;
8129 /* It there was a failure in the previous case label, give up
8130 for this case label list. Continue with the next block. */
8134 /* See if any case labels that are unreachable have been seen.
8135 If so, we eliminate them. This is a bit of a kludge because
8136 the case lists for a single case statement (label) is a
8137 single forward linked lists. */
8138 if (seen_unreachable
)
8140 /* Advance until the first case in the list is reachable. */
8141 while (body
->ext
.block
.case_list
!= NULL
8142 && body
->ext
.block
.case_list
->unreachable
)
8144 gfc_case
*n
= body
->ext
.block
.case_list
;
8145 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8147 gfc_free_case_list (n
);
8150 /* Strip all other unreachable cases. */
8151 if (body
->ext
.block
.case_list
)
8153 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8155 if (cp
->next
->unreachable
)
8157 gfc_case
*n
= cp
->next
;
8158 cp
->next
= cp
->next
->next
;
8160 gfc_free_case_list (n
);
8167 /* See if there were overlapping cases. If the check returns NULL,
8168 there was overlap. In that case we don't do anything. If head
8169 is non-NULL, we prepend the DEFAULT case. The sorted list can
8170 then used during code generation for SELECT CASE constructs with
8171 a case expression of a CHARACTER type. */
8174 head
= check_case_overlap (head
);
8176 /* Prepend the default_case if it is there. */
8177 if (head
!= NULL
&& default_case
)
8179 default_case
->left
= NULL
;
8180 default_case
->right
= head
;
8181 head
->left
= default_case
;
8185 /* Eliminate dead blocks that may be the result if we've seen
8186 unreachable case labels for a block. */
8187 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8189 if (body
->block
->ext
.block
.case_list
== NULL
)
8191 /* Cut the unreachable block from the code chain. */
8192 gfc_code
*c
= body
->block
;
8193 body
->block
= c
->block
;
8195 /* Kill the dead block, but not the blocks below it. */
8197 gfc_free_statements (c
);
8201 /* More than two cases is legal but insane for logical selects.
8202 Issue a warning for it. */
8203 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8204 gfc_warning (OPT_Wsurprising
,
8205 "Logical SELECT CASE block at %L has more that two cases",
8210 /* Check if a derived type is extensible. */
8213 gfc_type_is_extensible (gfc_symbol
*sym
)
8215 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8216 || (sym
->attr
.is_class
8217 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8222 resolve_types (gfc_namespace
*ns
);
8224 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8225 correct as well as possibly the array-spec. */
8228 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8232 gcc_assert (sym
->assoc
);
8233 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8235 /* If this is for SELECT TYPE, the target may not yet be set. In that
8236 case, return. Resolution will be called later manually again when
8238 target
= sym
->assoc
->target
;
8241 gcc_assert (!sym
->assoc
->dangling
);
8243 if (resolve_target
&& !gfc_resolve_expr (target
))
8246 /* For variable targets, we get some attributes from the target. */
8247 if (target
->expr_type
== EXPR_VARIABLE
)
8251 gcc_assert (target
->symtree
);
8252 tsym
= target
->symtree
->n
.sym
;
8254 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8255 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8257 sym
->attr
.target
= tsym
->attr
.target
8258 || gfc_expr_attr (target
).pointer
;
8259 if (is_subref_array (target
))
8260 sym
->attr
.subref_array_pointer
= 1;
8263 /* Get type if this was not already set. Note that it can be
8264 some other type than the target in case this is a SELECT TYPE
8265 selector! So we must not update when the type is already there. */
8266 if (sym
->ts
.type
== BT_UNKNOWN
)
8267 sym
->ts
= target
->ts
;
8268 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8270 /* See if this is a valid association-to-variable. */
8271 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8272 && !gfc_has_vector_subscript (target
));
8274 /* Finally resolve if this is an array or not. */
8275 if (sym
->attr
.dimension
&& target
->rank
== 0)
8277 /* primary.c makes the assumption that a reference to an associate
8278 name followed by a left parenthesis is an array reference. */
8279 if (sym
->ts
.type
!= BT_CHARACTER
)
8280 gfc_error ("Associate-name %qs at %L is used as array",
8281 sym
->name
, &sym
->declared_at
);
8282 sym
->attr
.dimension
= 0;
8287 /* We cannot deal with class selectors that need temporaries. */
8288 if (target
->ts
.type
== BT_CLASS
8289 && gfc_ref_needs_temporary_p (target
->ref
))
8291 gfc_error ("CLASS selector at %L needs a temporary which is not "
8292 "yet implemented", &target
->where
);
8296 if (target
->ts
.type
== BT_CLASS
)
8297 gfc_fix_class_refs (target
);
8299 if (target
->rank
!= 0)
8302 /* The rank may be incorrectly guessed at parsing, therefore make sure
8303 it is corrected now. */
8304 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8307 sym
->as
= gfc_get_array_spec ();
8309 as
->rank
= target
->rank
;
8310 as
->type
= AS_DEFERRED
;
8311 as
->corank
= gfc_get_corank (target
);
8312 sym
->attr
.dimension
= 1;
8313 if (as
->corank
!= 0)
8314 sym
->attr
.codimension
= 1;
8319 /* target's rank is 0, but the type of the sym is still array valued,
8320 which has to be corrected. */
8321 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8324 symbol_attribute attr
;
8325 /* The associated variable's type is still the array type
8326 correct this now. */
8327 gfc_typespec
*ts
= &target
->ts
;
8330 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8335 ts
= &ref
->u
.c
.component
->ts
;
8338 if (ts
->type
== BT_CLASS
)
8339 ts
= &ts
->u
.derived
->components
->ts
;
8345 /* Create a scalar instance of the current class type. Because the
8346 rank of a class array goes into its name, the type has to be
8347 rebuild. The alternative of (re-)setting just the attributes
8348 and as in the current type, destroys the type also in other
8352 sym
->ts
.type
= BT_CLASS
;
8353 attr
= CLASS_DATA (sym
)->attr
;
8355 attr
.associate_var
= 1;
8356 attr
.dimension
= attr
.codimension
= 0;
8357 attr
.class_pointer
= 1;
8358 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8360 /* Make sure the _vptr is set. */
8361 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8362 if (c
->ts
.u
.derived
== NULL
)
8363 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8364 CLASS_DATA (sym
)->attr
.pointer
= 1;
8365 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8366 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8367 gfc_commit_symbol (sym
->ts
.u
.derived
);
8368 /* _vptr now has the _vtab in it, change it to the _vtype. */
8369 if (c
->ts
.u
.derived
->attr
.vtab
)
8370 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8371 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8372 resolve_types (c
->ts
.u
.derived
->ns
);
8376 /* Mark this as an associate variable. */
8377 sym
->attr
.associate_var
= 1;
8379 /* Fix up the type-spec for CHARACTER types. */
8380 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8383 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8385 if (!sym
->ts
.u
.cl
->length
)
8386 sym
->ts
.u
.cl
->length
8387 = gfc_get_int_expr (gfc_default_integer_kind
,
8388 NULL
, target
->value
.character
.length
);
8391 /* If the target is a good class object, so is the associate variable. */
8392 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8393 sym
->attr
.class_ok
= 1;
8397 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8398 array reference, where necessary. The symbols are artificial and so
8399 the dimension attribute and arrayspec can also be set. In addition,
8400 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8401 This is corrected here as well.*/
8404 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8405 int rank
, gfc_ref
*ref
)
8407 gfc_ref
*nref
= (*expr1
)->ref
;
8408 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8409 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8410 (*expr1
)->rank
= rank
;
8411 if (sym1
->ts
.type
== BT_CLASS
)
8413 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8414 (*expr1
)->ts
= sym1
->ts
;
8416 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8417 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8418 CLASS_DATA (sym1
)->as
8419 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8423 sym1
->attr
.dimension
= 1;
8424 if (sym1
->as
== NULL
&& sym2
)
8425 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8428 for (; nref
; nref
= nref
->next
)
8429 if (nref
->next
== NULL
)
8432 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8433 nref
->next
= gfc_copy_ref (ref
);
8434 else if (ref
&& !nref
)
8435 (*expr1
)->ref
= gfc_copy_ref (ref
);
8440 build_loc_call (gfc_expr
*sym_expr
)
8443 loc_call
= gfc_get_expr ();
8444 loc_call
->expr_type
= EXPR_FUNCTION
;
8445 gfc_get_sym_tree ("loc", gfc_current_ns
, &loc_call
->symtree
, false);
8446 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8447 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8448 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8449 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8450 loc_call
->ts
.type
= BT_INTEGER
;
8451 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8452 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8453 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8454 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8455 loc_call
->where
= sym_expr
->where
;
8459 /* Resolve a SELECT TYPE statement. */
8462 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8464 gfc_symbol
*selector_type
;
8465 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8466 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8469 char name
[GFC_MAX_SYMBOL_LEN
];
8474 gfc_ref
* ref
= NULL
;
8475 gfc_expr
*selector_expr
= NULL
;
8477 ns
= code
->ext
.block
.ns
;
8480 /* Check for F03:C813. */
8481 if (code
->expr1
->ts
.type
!= BT_CLASS
8482 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8484 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8485 "at %L", &code
->loc
);
8489 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8494 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8495 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8496 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8498 /* F2008: C803 The selector expression must not be coindexed. */
8499 if (gfc_is_coindexed (code
->expr2
))
8501 gfc_error ("Selector at %L must not be coindexed",
8502 &code
->expr2
->where
);
8509 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8511 if (gfc_is_coindexed (code
->expr1
))
8513 gfc_error ("Selector at %L must not be coindexed",
8514 &code
->expr1
->where
);
8519 /* Loop over TYPE IS / CLASS IS cases. */
8520 for (body
= code
->block
; body
; body
= body
->block
)
8522 c
= body
->ext
.block
.case_list
;
8526 /* Check for repeated cases. */
8527 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8529 gfc_case
*d
= tail
->ext
.block
.case_list
;
8533 if (c
->ts
.type
== d
->ts
.type
8534 && ((c
->ts
.type
== BT_DERIVED
8535 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8536 && !strcmp (c
->ts
.u
.derived
->name
,
8537 d
->ts
.u
.derived
->name
))
8538 || c
->ts
.type
== BT_UNKNOWN
8539 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8540 && c
->ts
.kind
== d
->ts
.kind
)))
8542 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8543 &c
->where
, &d
->where
);
8549 /* Check F03:C815. */
8550 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8551 && !selector_type
->attr
.unlimited_polymorphic
8552 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8554 gfc_error ("Derived type %qs at %L must be extensible",
8555 c
->ts
.u
.derived
->name
, &c
->where
);
8560 /* Check F03:C816. */
8561 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8562 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8563 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8565 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8566 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8567 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8569 gfc_error ("Unexpected intrinsic type %qs at %L",
8570 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8575 /* Check F03:C814. */
8576 if (c
->ts
.type
== BT_CHARACTER
8577 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8579 gfc_error ("The type-spec at %L shall specify that each length "
8580 "type parameter is assumed", &c
->where
);
8585 /* Intercept the DEFAULT case. */
8586 if (c
->ts
.type
== BT_UNKNOWN
)
8588 /* Check F03:C818. */
8591 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8592 "by a second DEFAULT CASE at %L",
8593 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8598 default_case
= body
;
8605 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8606 target if present. If there are any EXIT statements referring to the
8607 SELECT TYPE construct, this is no problem because the gfc_code
8608 reference stays the same and EXIT is equally possible from the BLOCK
8609 it is changed to. */
8610 code
->op
= EXEC_BLOCK
;
8613 gfc_association_list
* assoc
;
8615 assoc
= gfc_get_association_list ();
8616 assoc
->st
= code
->expr1
->symtree
;
8617 assoc
->target
= gfc_copy_expr (code
->expr2
);
8618 assoc
->target
->where
= code
->expr2
->where
;
8619 /* assoc->variable will be set by resolve_assoc_var. */
8621 code
->ext
.block
.assoc
= assoc
;
8622 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8624 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8627 code
->ext
.block
.assoc
= NULL
;
8629 /* Ensure that the selector rank and arrayspec are available to
8630 correct expressions in which they might be missing. */
8631 if (code
->expr2
&& code
->expr2
->rank
)
8633 rank
= code
->expr2
->rank
;
8634 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8635 if (ref
->next
== NULL
)
8637 if (ref
&& ref
->type
== REF_ARRAY
)
8638 ref
= gfc_copy_ref (ref
);
8640 /* Fixup expr1 if necessary. */
8642 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8644 else if (code
->expr1
->rank
)
8646 rank
= code
->expr1
->rank
;
8647 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8648 if (ref
->next
== NULL
)
8650 if (ref
&& ref
->type
== REF_ARRAY
)
8651 ref
= gfc_copy_ref (ref
);
8654 /* Add EXEC_SELECT to switch on type. */
8655 new_st
= gfc_get_code (code
->op
);
8656 new_st
->expr1
= code
->expr1
;
8657 new_st
->expr2
= code
->expr2
;
8658 new_st
->block
= code
->block
;
8659 code
->expr1
= code
->expr2
= NULL
;
8664 ns
->code
->next
= new_st
;
8666 code
->op
= EXEC_SELECT_TYPE
;
8668 /* Use the intrinsic LOC function to generate an integer expression
8669 for the vtable of the selector. Note that the rank of the selector
8670 expression has to be set to zero. */
8671 gfc_add_vptr_component (code
->expr1
);
8672 code
->expr1
->rank
= 0;
8673 code
->expr1
= build_loc_call (code
->expr1
);
8674 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8676 /* Loop over TYPE IS / CLASS IS cases. */
8677 for (body
= code
->block
; body
; body
= body
->block
)
8681 c
= body
->ext
.block
.case_list
;
8683 /* Generate an index integer expression for address of the
8684 TYPE/CLASS vtable and store it in c->low. The hash expression
8685 is stored in c->high and is used to resolve intrinsic cases. */
8686 if (c
->ts
.type
!= BT_UNKNOWN
)
8688 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8690 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8692 c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
8693 c
->ts
.u
.derived
->hash_value
);
8697 vtab
= gfc_find_vtab (&c
->ts
);
8698 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8699 e
= CLASS_DATA (vtab
)->initializer
;
8700 c
->high
= gfc_copy_expr (e
);
8703 e
= gfc_lval_expr_from_sym (vtab
);
8704 c
->low
= build_loc_call (e
);
8709 /* Associate temporary to selector. This should only be done
8710 when this case is actually true, so build a new ASSOCIATE
8711 that does precisely this here (instead of using the
8714 if (c
->ts
.type
== BT_CLASS
)
8715 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
8716 else if (c
->ts
.type
== BT_DERIVED
)
8717 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
8718 else if (c
->ts
.type
== BT_CHARACTER
)
8720 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
8721 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8722 charlen
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
8723 sprintf (name
, "__tmp_%s_%d_%d", gfc_basic_typename (c
->ts
.type
),
8724 charlen
, c
->ts
.kind
);
8727 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
8730 st
= gfc_find_symtree (ns
->sym_root
, name
);
8731 gcc_assert (st
->n
.sym
->assoc
);
8732 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
8733 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
8734 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
8736 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
8737 /* Fixup the target expression if necessary. */
8739 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
8742 new_st
= gfc_get_code (EXEC_BLOCK
);
8743 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
8744 new_st
->ext
.block
.ns
->code
= body
->next
;
8745 body
->next
= new_st
;
8747 /* Chain in the new list only if it is marked as dangling. Otherwise
8748 there is a CASE label overlap and this is already used. Just ignore,
8749 the error is diagnosed elsewhere. */
8750 if (st
->n
.sym
->assoc
->dangling
)
8752 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
8753 st
->n
.sym
->assoc
->dangling
= 0;
8756 resolve_assoc_var (st
->n
.sym
, false);
8759 /* Take out CLASS IS cases for separate treatment. */
8761 while (body
&& body
->block
)
8763 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
8765 /* Add to class_is list. */
8766 if (class_is
== NULL
)
8768 class_is
= body
->block
;
8773 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
8774 tail
->block
= body
->block
;
8777 /* Remove from EXEC_SELECT list. */
8778 body
->block
= body
->block
->block
;
8791 /* Add a default case to hold the CLASS IS cases. */
8792 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
8793 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
8795 tail
->ext
.block
.case_list
= gfc_get_case ();
8796 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
8798 default_case
= tail
;
8801 /* More than one CLASS IS block? */
8802 if (class_is
->block
)
8806 /* Sort CLASS IS blocks by extension level. */
8810 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
8813 /* F03:C817 (check for doubles). */
8814 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
8815 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
8817 gfc_error ("Double CLASS IS block in SELECT TYPE "
8819 &c2
->ext
.block
.case_list
->where
);
8822 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
8823 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
8826 (*c1
)->block
= c2
->block
;
8836 /* Generate IF chain. */
8837 if_st
= gfc_get_code (EXEC_IF
);
8839 for (body
= class_is
; body
; body
= body
->block
)
8841 new_st
->block
= gfc_get_code (EXEC_IF
);
8842 new_st
= new_st
->block
;
8843 /* Set up IF condition: Call _gfortran_is_extension_of. */
8844 new_st
->expr1
= gfc_get_expr ();
8845 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
8846 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
8847 new_st
->expr1
->ts
.kind
= 4;
8848 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
8849 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
8850 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
8851 /* Set up arguments. */
8852 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
8853 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
8854 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
8855 new_st
->expr1
->where
= code
->loc
;
8856 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
8857 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
8858 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
8859 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
8860 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
8861 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
8862 new_st
->next
= body
->next
;
8864 if (default_case
->next
)
8866 new_st
->block
= gfc_get_code (EXEC_IF
);
8867 new_st
= new_st
->block
;
8868 new_st
->next
= default_case
->next
;
8871 /* Replace CLASS DEFAULT code by the IF chain. */
8872 default_case
->next
= if_st
;
8875 /* Resolve the internal code. This can not be done earlier because
8876 it requires that the sym->assoc of selectors is set already. */
8877 gfc_current_ns
= ns
;
8878 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
8879 gfc_current_ns
= old_ns
;
8886 /* Resolve a transfer statement. This is making sure that:
8887 -- a derived type being transferred has only non-pointer components
8888 -- a derived type being transferred doesn't have private components, unless
8889 it's being transferred from the module where the type was defined
8890 -- we're not trying to transfer a whole assumed size array. */
8893 resolve_transfer (gfc_code
*code
)
8896 gfc_symbol
*sym
, *derived
;
8900 bool formatted
= false;
8901 gfc_dt
*dt
= code
->ext
.dt
;
8902 gfc_symbol
*dtio_sub
= NULL
;
8906 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
8907 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
8908 exp
= exp
->value
.op
.op1
;
8910 if (exp
&& exp
->expr_type
== EXPR_NULL
8913 gfc_error ("Invalid context for NULL () intrinsic at %L",
8918 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
8919 && exp
->expr_type
!= EXPR_FUNCTION
8920 && exp
->expr_type
!= EXPR_STRUCTURE
))
8923 /* If we are reading, the variable will be changed. Note that
8924 code->ext.dt may be NULL if the TRANSFER is related to
8925 an INQUIRE statement -- but in this case, we are not reading, either. */
8926 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
8927 && !gfc_check_vardef_context (exp
, false, false, false,
8931 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
8933 /* Go to actual component transferred. */
8934 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
8935 if (ref
->type
== REF_COMPONENT
)
8936 ts
= &ref
->u
.c
.component
->ts
;
8938 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
8939 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
8941 if (ts
->type
== BT_DERIVED
)
8942 derived
= ts
->u
.derived
;
8944 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
8946 if (dt
->format_expr
)
8949 fmt
= gfc_widechar_to_char (dt
->format_expr
->value
.character
.string
,
8951 if (strtok (fmt
, "DT") != NULL
)
8954 else if (dt
->format_label
== &format_asterisk
)
8956 /* List directed io must call the formatted DTIO procedure. */
8960 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
8961 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
8962 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
8964 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
8967 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
8968 /* Check to see if this is a nested DTIO call, with the
8969 dummy as the io-list object. */
8970 if (sym
&& sym
== dtio_sub
&& sym
->formal
8971 && sym
->formal
->sym
== exp
->symtree
->n
.sym
8972 && exp
->ref
== NULL
)
8974 if (!sym
->attr
.recursive
)
8976 gfc_error ("DTIO %s procedure at %L must be recursive",
8977 sym
->name
, &sym
->declared_at
);
8984 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
8986 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
8987 "it is processed by a defined input/output procedure",
8992 if (ts
->type
== BT_DERIVED
)
8994 /* Check that transferred derived type doesn't contain POINTER
8995 components unless it is processed by a defined input/output
8997 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
8999 gfc_error ("Data transfer element at %L cannot have POINTER "
9000 "components unless it is processed by a defined "
9001 "input/output procedure", &code
->loc
);
9006 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9008 gfc_error ("Data transfer element at %L cannot have "
9009 "procedure pointer components", &code
->loc
);
9013 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9015 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9016 "components unless it is processed by a defined "
9017 "input/output procedure", &code
->loc
);
9021 /* C_PTR and C_FUNPTR have private components which means they can not
9022 be printed. However, if -std=gnu and not -pedantic, allow
9023 the component to be printed to help debugging. */
9024 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9026 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9027 "cannot have PRIVATE components", &code
->loc
))
9030 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9032 gfc_error ("Data transfer element at %L cannot have "
9033 "PRIVATE components unless it is processed by "
9034 "a defined input/output procedure", &code
->loc
);
9039 if (exp
->expr_type
== EXPR_STRUCTURE
)
9042 sym
= exp
->symtree
->n
.sym
;
9044 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9045 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9047 gfc_error ("Data transfer element at %L cannot be a full reference to "
9048 "an assumed-size array", &code
->loc
);
9054 /*********** Toplevel code resolution subroutines ***********/
9056 /* Find the set of labels that are reachable from this block. We also
9057 record the last statement in each block. */
9060 find_reachable_labels (gfc_code
*block
)
9067 cs_base
->reachable_labels
= bitmap_obstack_alloc (&labels_obstack
);
9069 /* Collect labels in this block. We don't keep those corresponding
9070 to END {IF|SELECT}, these are checked in resolve_branch by going
9071 up through the code_stack. */
9072 for (c
= block
; c
; c
= c
->next
)
9074 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9075 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9078 /* Merge with labels from parent block. */
9081 gcc_assert (cs_base
->prev
->reachable_labels
);
9082 bitmap_ior_into (cs_base
->reachable_labels
,
9083 cs_base
->prev
->reachable_labels
);
9089 resolve_lock_unlock_event (gfc_code
*code
)
9091 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9092 && code
->expr1
->value
.function
.isym
9093 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9094 remove_caf_get_intrinsic (code
->expr1
);
9096 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9097 && (code
->expr1
->ts
.type
!= BT_DERIVED
9098 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9099 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9100 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9101 || code
->expr1
->rank
!= 0
9102 || (!gfc_is_coarray (code
->expr1
) &&
9103 !gfc_is_coindexed (code
->expr1
))))
9104 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9105 &code
->expr1
->where
);
9106 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9107 && (code
->expr1
->ts
.type
!= BT_DERIVED
9108 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9109 || code
->expr1
->ts
.u
.derived
->from_intmod
9110 != INTMOD_ISO_FORTRAN_ENV
9111 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9112 != ISOFORTRAN_EVENT_TYPE
9113 || code
->expr1
->rank
!= 0))
9114 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9115 &code
->expr1
->where
);
9116 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9117 && !gfc_is_coindexed (code
->expr1
))
9118 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9119 &code
->expr1
->where
);
9120 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9121 gfc_error ("Event variable argument at %L must be a coarray but not "
9122 "coindexed", &code
->expr1
->where
);
9126 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9127 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9128 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9129 &code
->expr2
->where
);
9132 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9133 _("STAT variable")))
9138 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9139 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9140 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9141 &code
->expr3
->where
);
9144 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9145 _("ERRMSG variable")))
9148 /* Check for LOCK the ACQUIRED_LOCK. */
9149 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9150 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9151 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9152 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9153 "variable", &code
->expr4
->where
);
9155 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9156 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9157 _("ACQUIRED_LOCK variable")))
9160 /* Check for EVENT WAIT the UNTIL_COUNT. */
9161 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
9162 && (code
->expr4
->ts
.type
!= BT_INTEGER
|| code
->expr4
->rank
!= 0))
9163 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9164 "expression", &code
->expr4
->where
);
9169 resolve_critical (gfc_code
*code
)
9171 gfc_symtree
*symtree
;
9172 gfc_symbol
*lock_type
;
9173 char name
[GFC_MAX_SYMBOL_LEN
];
9174 static int serial
= 0;
9176 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9179 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9180 GFC_PREFIX ("lock_type"));
9182 lock_type
= symtree
->n
.sym
;
9185 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9188 lock_type
= symtree
->n
.sym
;
9189 lock_type
->attr
.flavor
= FL_DERIVED
;
9190 lock_type
->attr
.zero_comp
= 1;
9191 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9192 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9195 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9196 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9199 code
->resolved_sym
= symtree
->n
.sym
;
9200 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9201 symtree
->n
.sym
->attr
.referenced
= 1;
9202 symtree
->n
.sym
->attr
.artificial
= 1;
9203 symtree
->n
.sym
->attr
.codimension
= 1;
9204 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9205 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9206 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9207 symtree
->n
.sym
->as
->corank
= 1;
9208 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9209 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9210 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9212 gfc_commit_symbols();
9217 resolve_sync (gfc_code
*code
)
9219 /* Check imageset. The * case matches expr1 == NULL. */
9222 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9223 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9224 "INTEGER expression", &code
->expr1
->where
);
9225 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9226 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9227 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9228 &code
->expr1
->where
);
9229 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9230 && gfc_simplify_expr (code
->expr1
, 0))
9232 gfc_constructor
*cons
;
9233 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9234 for (; cons
; cons
= gfc_constructor_next (cons
))
9235 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9236 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9237 gfc_error ("Imageset argument at %L must between 1 and "
9238 "num_images()", &cons
->expr
->where
);
9244 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9245 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9246 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9247 &code
->expr2
->where
);
9251 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9252 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9253 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9254 &code
->expr3
->where
);
9258 /* Given a branch to a label, see if the branch is conforming.
9259 The code node describes where the branch is located. */
9262 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9269 /* Step one: is this a valid branching target? */
9271 if (label
->defined
== ST_LABEL_UNKNOWN
)
9273 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9278 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9280 gfc_error ("Statement at %L is not a valid branch target statement "
9281 "for the branch statement at %L", &label
->where
, &code
->loc
);
9285 /* Step two: make sure this branch is not a branch to itself ;-) */
9287 if (code
->here
== label
)
9290 "Branch at %L may result in an infinite loop", &code
->loc
);
9294 /* Step three: See if the label is in the same block as the
9295 branching statement. The hard work has been done by setting up
9296 the bitmap reachable_labels. */
9298 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9300 /* Check now whether there is a CRITICAL construct; if so, check
9301 whether the label is still visible outside of the CRITICAL block,
9302 which is invalid. */
9303 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9305 if (stack
->current
->op
== EXEC_CRITICAL
9306 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9307 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9308 "label at %L", &code
->loc
, &label
->where
);
9309 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9310 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9311 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9312 "for label at %L", &code
->loc
, &label
->where
);
9318 /* Step four: If we haven't found the label in the bitmap, it may
9319 still be the label of the END of the enclosing block, in which
9320 case we find it by going up the code_stack. */
9322 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9324 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9326 if (stack
->current
->op
== EXEC_CRITICAL
)
9328 /* Note: A label at END CRITICAL does not leave the CRITICAL
9329 construct as END CRITICAL is still part of it. */
9330 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9331 " at %L", &code
->loc
, &label
->where
);
9334 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9336 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9337 "label at %L", &code
->loc
, &label
->where
);
9344 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9348 /* The label is not in an enclosing block, so illegal. This was
9349 allowed in Fortran 66, so we allow it as extension. No
9350 further checks are necessary in this case. */
9351 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9352 "as the GOTO statement at %L", &label
->where
,
9358 /* Check whether EXPR1 has the same shape as EXPR2. */
9361 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9363 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9364 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9365 bool result
= false;
9368 /* Compare the rank. */
9369 if (expr1
->rank
!= expr2
->rank
)
9372 /* Compare the size of each dimension. */
9373 for (i
=0; i
<expr1
->rank
; i
++)
9375 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9378 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9381 if (mpz_cmp (shape
[i
], shape2
[i
]))
9385 /* When either of the two expression is an assumed size array, we
9386 ignore the comparison of dimension sizes. */
9391 gfc_clear_shape (shape
, i
);
9392 gfc_clear_shape (shape2
, i
);
9397 /* Check whether a WHERE assignment target or a WHERE mask expression
9398 has the same shape as the outmost WHERE mask expression. */
9401 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9407 cblock
= code
->block
;
9409 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9410 In case of nested WHERE, only the outmost one is stored. */
9411 if (mask
== NULL
) /* outmost WHERE */
9413 else /* inner WHERE */
9420 /* Check if the mask-expr has a consistent shape with the
9421 outmost WHERE mask-expr. */
9422 if (!resolve_where_shape (cblock
->expr1
, e
))
9423 gfc_error ("WHERE mask at %L has inconsistent shape",
9424 &cblock
->expr1
->where
);
9427 /* the assignment statement of a WHERE statement, or the first
9428 statement in where-body-construct of a WHERE construct */
9429 cnext
= cblock
->next
;
9434 /* WHERE assignment statement */
9437 /* Check shape consistent for WHERE assignment target. */
9438 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9439 gfc_error ("WHERE assignment target at %L has "
9440 "inconsistent shape", &cnext
->expr1
->where
);
9444 case EXEC_ASSIGN_CALL
:
9445 resolve_call (cnext
);
9446 if (!cnext
->resolved_sym
->attr
.elemental
)
9447 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9448 &cnext
->ext
.actual
->expr
->where
);
9451 /* WHERE or WHERE construct is part of a where-body-construct */
9453 resolve_where (cnext
, e
);
9457 gfc_error ("Unsupported statement inside WHERE at %L",
9460 /* the next statement within the same where-body-construct */
9461 cnext
= cnext
->next
;
9463 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9464 cblock
= cblock
->block
;
9469 /* Resolve assignment in FORALL construct.
9470 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9471 FORALL index variables. */
9474 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9478 for (n
= 0; n
< nvar
; n
++)
9480 gfc_symbol
*forall_index
;
9482 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9484 /* Check whether the assignment target is one of the FORALL index
9486 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9487 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9488 gfc_error ("Assignment to a FORALL index variable at %L",
9489 &code
->expr1
->where
);
9492 /* If one of the FORALL index variables doesn't appear in the
9493 assignment variable, then there could be a many-to-one
9494 assignment. Emit a warning rather than an error because the
9495 mask could be resolving this problem. */
9496 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9497 gfc_warning (0, "The FORALL with index %qs is not used on the "
9498 "left side of the assignment at %L and so might "
9499 "cause multiple assignment to this object",
9500 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9506 /* Resolve WHERE statement in FORALL construct. */
9509 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9510 gfc_expr
**var_expr
)
9515 cblock
= code
->block
;
9518 /* the assignment statement of a WHERE statement, or the first
9519 statement in where-body-construct of a WHERE construct */
9520 cnext
= cblock
->next
;
9525 /* WHERE assignment statement */
9527 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9530 /* WHERE operator assignment statement */
9531 case EXEC_ASSIGN_CALL
:
9532 resolve_call (cnext
);
9533 if (!cnext
->resolved_sym
->attr
.elemental
)
9534 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9535 &cnext
->ext
.actual
->expr
->where
);
9538 /* WHERE or WHERE construct is part of a where-body-construct */
9540 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9544 gfc_error ("Unsupported statement inside WHERE at %L",
9547 /* the next statement within the same where-body-construct */
9548 cnext
= cnext
->next
;
9550 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9551 cblock
= cblock
->block
;
9556 /* Traverse the FORALL body to check whether the following errors exist:
9557 1. For assignment, check if a many-to-one assignment happens.
9558 2. For WHERE statement, check the WHERE body to see if there is any
9559 many-to-one assignment. */
9562 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9566 c
= code
->block
->next
;
9572 case EXEC_POINTER_ASSIGN
:
9573 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9576 case EXEC_ASSIGN_CALL
:
9580 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9581 there is no need to handle it here. */
9585 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9590 /* The next statement in the FORALL body. */
9596 /* Counts the number of iterators needed inside a forall construct, including
9597 nested forall constructs. This is used to allocate the needed memory
9598 in gfc_resolve_forall. */
9601 gfc_count_forall_iterators (gfc_code
*code
)
9603 int max_iters
, sub_iters
, current_iters
;
9604 gfc_forall_iterator
*fa
;
9606 gcc_assert(code
->op
== EXEC_FORALL
);
9610 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9613 code
= code
->block
->next
;
9617 if (code
->op
== EXEC_FORALL
)
9619 sub_iters
= gfc_count_forall_iterators (code
);
9620 if (sub_iters
> max_iters
)
9621 max_iters
= sub_iters
;
9626 return current_iters
+ max_iters
;
9630 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9631 gfc_resolve_forall_body to resolve the FORALL body. */
9634 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9636 static gfc_expr
**var_expr
;
9637 static int total_var
= 0;
9638 static int nvar
= 0;
9639 int i
, old_nvar
, tmp
;
9640 gfc_forall_iterator
*fa
;
9644 /* Start to resolve a FORALL construct */
9645 if (forall_save
== 0)
9647 /* Count the total number of FORALL indices in the nested FORALL
9648 construct in order to allocate the VAR_EXPR with proper size. */
9649 total_var
= gfc_count_forall_iterators (code
);
9651 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9652 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9655 /* The information about FORALL iterator, including FORALL indices start, end
9656 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9657 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9659 /* Fortran 20008: C738 (R753). */
9660 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9662 gfc_error ("FORALL index-name at %L must be a scalar variable "
9663 "of type integer", &fa
->var
->where
);
9667 /* Check if any outer FORALL index name is the same as the current
9669 for (i
= 0; i
< nvar
; i
++)
9671 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9672 gfc_error ("An outer FORALL construct already has an index "
9673 "with this name %L", &fa
->var
->where
);
9676 /* Record the current FORALL index. */
9677 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9681 /* No memory leak. */
9682 gcc_assert (nvar
<= total_var
);
9685 /* Resolve the FORALL body. */
9686 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9688 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9689 gfc_resolve_blocks (code
->block
, ns
);
9693 /* Free only the VAR_EXPRs allocated in this frame. */
9694 for (i
= nvar
; i
< tmp
; i
++)
9695 gfc_free_expr (var_expr
[i
]);
9699 /* We are in the outermost FORALL construct. */
9700 gcc_assert (forall_save
== 0);
9702 /* VAR_EXPR is not needed any more. */
9709 /* Resolve a BLOCK construct statement. */
9712 resolve_block_construct (gfc_code
* code
)
9714 /* Resolve the BLOCK's namespace. */
9715 gfc_resolve (code
->ext
.block
.ns
);
9717 /* For an ASSOCIATE block, the associations (and their targets) are already
9718 resolved during resolve_symbol. */
9722 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
9726 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
9730 for (; b
; b
= b
->block
)
9732 t
= gfc_resolve_expr (b
->expr1
);
9733 if (!gfc_resolve_expr (b
->expr2
))
9739 if (t
&& b
->expr1
!= NULL
9740 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
9741 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
9748 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
9749 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
9754 resolve_branch (b
->label1
, b
);
9758 resolve_block_construct (b
);
9762 case EXEC_SELECT_TYPE
:
9766 case EXEC_DO_CONCURRENT
:
9774 case EXEC_OMP_ATOMIC
:
9775 case EXEC_OACC_ATOMIC
:
9777 gfc_omp_atomic_op aop
9778 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
9780 /* Verify this before calling gfc_resolve_code, which might
9782 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
9783 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
9784 && b
->next
->next
== NULL
)
9785 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
9786 && b
->next
->next
!= NULL
9787 && b
->next
->next
->op
== EXEC_ASSIGN
9788 && b
->next
->next
->next
== NULL
));
9792 case EXEC_OACC_PARALLEL_LOOP
:
9793 case EXEC_OACC_PARALLEL
:
9794 case EXEC_OACC_KERNELS_LOOP
:
9795 case EXEC_OACC_KERNELS
:
9796 case EXEC_OACC_DATA
:
9797 case EXEC_OACC_HOST_DATA
:
9798 case EXEC_OACC_LOOP
:
9799 case EXEC_OACC_UPDATE
:
9800 case EXEC_OACC_WAIT
:
9801 case EXEC_OACC_CACHE
:
9802 case EXEC_OACC_ENTER_DATA
:
9803 case EXEC_OACC_EXIT_DATA
:
9804 case EXEC_OACC_ROUTINE
:
9805 case EXEC_OMP_CRITICAL
:
9806 case EXEC_OMP_DISTRIBUTE
:
9807 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
9808 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
9809 case EXEC_OMP_DISTRIBUTE_SIMD
:
9811 case EXEC_OMP_DO_SIMD
:
9812 case EXEC_OMP_MASTER
:
9813 case EXEC_OMP_ORDERED
:
9814 case EXEC_OMP_PARALLEL
:
9815 case EXEC_OMP_PARALLEL_DO
:
9816 case EXEC_OMP_PARALLEL_DO_SIMD
:
9817 case EXEC_OMP_PARALLEL_SECTIONS
:
9818 case EXEC_OMP_PARALLEL_WORKSHARE
:
9819 case EXEC_OMP_SECTIONS
:
9821 case EXEC_OMP_SINGLE
:
9822 case EXEC_OMP_TARGET
:
9823 case EXEC_OMP_TARGET_DATA
:
9824 case EXEC_OMP_TARGET_ENTER_DATA
:
9825 case EXEC_OMP_TARGET_EXIT_DATA
:
9826 case EXEC_OMP_TARGET_PARALLEL
:
9827 case EXEC_OMP_TARGET_PARALLEL_DO
:
9828 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
9829 case EXEC_OMP_TARGET_SIMD
:
9830 case EXEC_OMP_TARGET_TEAMS
:
9831 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
9832 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
9833 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
9834 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
9835 case EXEC_OMP_TARGET_UPDATE
:
9837 case EXEC_OMP_TASKGROUP
:
9838 case EXEC_OMP_TASKLOOP
:
9839 case EXEC_OMP_TASKLOOP_SIMD
:
9840 case EXEC_OMP_TASKWAIT
:
9841 case EXEC_OMP_TASKYIELD
:
9842 case EXEC_OMP_TEAMS
:
9843 case EXEC_OMP_TEAMS_DISTRIBUTE
:
9844 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
9845 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
9846 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
9847 case EXEC_OMP_WORKSHARE
:
9851 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
9854 gfc_resolve_code (b
->next
, ns
);
9859 /* Does everything to resolve an ordinary assignment. Returns true
9860 if this is an interface assignment. */
9862 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
9871 symbol_attribute attr
;
9873 if (gfc_extend_assign (code
, ns
))
9877 if (code
->op
== EXEC_ASSIGN_CALL
)
9879 lhs
= code
->ext
.actual
->expr
;
9880 rhsptr
= &code
->ext
.actual
->next
->expr
;
9884 gfc_actual_arglist
* args
;
9885 gfc_typebound_proc
* tbp
;
9887 gcc_assert (code
->op
== EXEC_COMPCALL
);
9889 args
= code
->expr1
->value
.compcall
.actual
;
9891 rhsptr
= &args
->next
->expr
;
9893 tbp
= code
->expr1
->value
.compcall
.tbp
;
9894 gcc_assert (!tbp
->is_generic
);
9897 /* Make a temporary rhs when there is a default initializer
9898 and rhs is the same symbol as the lhs. */
9899 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
9900 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
9901 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
9902 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
9903 *rhsptr
= gfc_get_parentheses (*rhsptr
);
9912 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
9913 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
9917 /* Handle the case of a BOZ literal on the RHS. */
9918 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
9921 if (warn_surprising
)
9922 gfc_warning (OPT_Wsurprising
,
9923 "BOZ literal at %L is bitwise transferred "
9924 "non-integer symbol %qs", &code
->loc
,
9925 lhs
->symtree
->n
.sym
->name
);
9927 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
9929 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
9931 if (rc
== ARITH_UNDERFLOW
)
9932 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
9933 ". This check can be disabled with the option "
9934 "%<-fno-range-check%>", &rhs
->where
);
9935 else if (rc
== ARITH_OVERFLOW
)
9936 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
9937 ". This check can be disabled with the option "
9938 "%<-fno-range-check%>", &rhs
->where
);
9939 else if (rc
== ARITH_NAN
)
9940 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
9941 ". This check can be disabled with the option "
9942 "%<-fno-range-check%>", &rhs
->where
);
9947 if (lhs
->ts
.type
== BT_CHARACTER
9948 && warn_character_truncation
)
9950 if (lhs
->ts
.u
.cl
!= NULL
9951 && lhs
->ts
.u
.cl
->length
!= NULL
9952 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9953 llen
= mpz_get_si (lhs
->ts
.u
.cl
->length
->value
.integer
);
9955 if (rhs
->expr_type
== EXPR_CONSTANT
)
9956 rlen
= rhs
->value
.character
.length
;
9958 else if (rhs
->ts
.u
.cl
!= NULL
9959 && rhs
->ts
.u
.cl
->length
!= NULL
9960 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9961 rlen
= mpz_get_si (rhs
->ts
.u
.cl
->length
->value
.integer
);
9963 if (rlen
&& llen
&& rlen
> llen
)
9964 gfc_warning_now (OPT_Wcharacter_truncation
,
9965 "CHARACTER expression will be truncated "
9966 "in assignment (%d/%d) at %L",
9967 llen
, rlen
, &code
->loc
);
9970 /* Ensure that a vector index expression for the lvalue is evaluated
9971 to a temporary if the lvalue symbol is referenced in it. */
9974 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
9975 if (ref
->type
== REF_ARRAY
)
9977 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
9978 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
9979 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
9980 ref
->u
.ar
.start
[n
]))
9982 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
9986 if (gfc_pure (NULL
))
9988 if (lhs
->ts
.type
== BT_DERIVED
9989 && lhs
->expr_type
== EXPR_VARIABLE
9990 && lhs
->ts
.u
.derived
->attr
.pointer_comp
9991 && rhs
->expr_type
== EXPR_VARIABLE
9992 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
9993 || gfc_is_coindexed (rhs
)))
9996 if (gfc_is_coindexed (rhs
))
9997 gfc_error ("Coindexed expression at %L is assigned to "
9998 "a derived type variable with a POINTER "
9999 "component in a PURE procedure",
10002 gfc_error ("The impure variable at %L is assigned to "
10003 "a derived type variable with a POINTER "
10004 "component in a PURE procedure (12.6)",
10009 /* Fortran 2008, C1283. */
10010 if (gfc_is_coindexed (lhs
))
10012 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10013 "procedure", &rhs
->where
);
10018 if (gfc_implicit_pure (NULL
))
10020 if (lhs
->expr_type
== EXPR_VARIABLE
10021 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10022 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10023 gfc_unset_implicit_pure (NULL
);
10025 if (lhs
->ts
.type
== BT_DERIVED
10026 && lhs
->expr_type
== EXPR_VARIABLE
10027 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10028 && rhs
->expr_type
== EXPR_VARIABLE
10029 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10030 || gfc_is_coindexed (rhs
)))
10031 gfc_unset_implicit_pure (NULL
);
10033 /* Fortran 2008, C1283. */
10034 if (gfc_is_coindexed (lhs
))
10035 gfc_unset_implicit_pure (NULL
);
10038 /* F2008, 7.2.1.2. */
10039 attr
= gfc_expr_attr (lhs
);
10040 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10042 if (attr
.codimension
)
10044 gfc_error ("Assignment to polymorphic coarray at %L is not "
10045 "permitted", &lhs
->where
);
10048 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10049 "polymorphic variable at %L", &lhs
->where
))
10051 if (!flag_realloc_lhs
)
10053 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10054 "requires %<-frealloc-lhs%>", &lhs
->where
);
10058 else if (lhs
->ts
.type
== BT_CLASS
)
10060 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10061 "assignment at %L - check that there is a matching specific "
10062 "subroutine for '=' operator", &lhs
->where
);
10066 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10068 /* F2008, Section 7.2.1.2. */
10069 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10071 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10072 "component in assignment at %L", &lhs
->where
);
10076 /* Assign the 'data' of a class object to a derived type. */
10077 if (lhs
->ts
.type
== BT_DERIVED
10078 && rhs
->ts
.type
== BT_CLASS
)
10079 gfc_add_data_component (rhs
);
10081 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10083 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10084 && code
->expr2
->value
.function
.isym
10085 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10086 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10087 && !gfc_expr_attr (rhs
).allocatable
10088 && !gfc_has_vector_subscript (rhs
)));
10090 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10092 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10093 Additionally, insert this code when the RHS is a CAF as we then use the
10094 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10095 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10096 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10098 if (caf_convert_to_send
)
10100 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10101 && code
->expr2
->value
.function
.isym
10102 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10103 remove_caf_get_intrinsic (code
->expr2
);
10104 code
->op
= EXEC_CALL
;
10105 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10106 code
->resolved_sym
= code
->symtree
->n
.sym
;
10107 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10108 code
->resolved_sym
->attr
.intrinsic
= 1;
10109 code
->resolved_sym
->attr
.subroutine
= 1;
10110 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10111 gfc_commit_symbol (code
->resolved_sym
);
10112 code
->ext
.actual
= gfc_get_actual_arglist ();
10113 code
->ext
.actual
->expr
= lhs
;
10114 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10115 code
->ext
.actual
->next
->expr
= rhs
;
10116 code
->expr1
= NULL
;
10117 code
->expr2
= NULL
;
10124 /* Add a component reference onto an expression. */
10127 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10132 ref
= &((*ref
)->next
);
10133 *ref
= gfc_get_ref ();
10134 (*ref
)->type
= REF_COMPONENT
;
10135 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10136 (*ref
)->u
.c
.component
= c
;
10139 /* Add a full array ref, as necessary. */
10142 gfc_add_full_array_ref (e
, c
->as
);
10143 e
->rank
= c
->as
->rank
;
10148 /* Build an assignment. Keep the argument 'op' for future use, so that
10149 pointer assignments can be made. */
10152 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10153 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10155 gfc_code
*this_code
;
10157 this_code
= gfc_get_code (op
);
10158 this_code
->next
= NULL
;
10159 this_code
->expr1
= gfc_copy_expr (expr1
);
10160 this_code
->expr2
= gfc_copy_expr (expr2
);
10161 this_code
->loc
= loc
;
10162 if (comp1
&& comp2
)
10164 add_comp_ref (this_code
->expr1
, comp1
);
10165 add_comp_ref (this_code
->expr2
, comp2
);
10172 /* Makes a temporary variable expression based on the characteristics of
10173 a given variable expression. */
10176 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10178 static int serial
= 0;
10179 char name
[GFC_MAX_SYMBOL_LEN
];
10181 gfc_array_spec
*as
;
10182 gfc_array_ref
*aref
;
10185 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10186 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10187 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10193 /* Obtain the arrayspec for the temporary. */
10194 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10195 && e
->expr_type
!= EXPR_FUNCTION
10196 && e
->expr_type
!= EXPR_OP
)
10198 aref
= gfc_find_array_ref (e
);
10199 if (e
->expr_type
== EXPR_VARIABLE
10200 && e
->symtree
->n
.sym
->as
== aref
->as
)
10204 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10205 if (ref
->type
== REF_COMPONENT
10206 && ref
->u
.c
.component
->as
== aref
->as
)
10214 /* Add the attributes and the arrayspec to the temporary. */
10215 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10216 tmp
->n
.sym
->attr
.function
= 0;
10217 tmp
->n
.sym
->attr
.result
= 0;
10218 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10222 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10225 if (as
->type
== AS_DEFERRED
)
10226 tmp
->n
.sym
->attr
.allocatable
= 1;
10228 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10229 || e
->expr_type
== EXPR_FUNCTION
10230 || e
->expr_type
== EXPR_OP
))
10232 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10233 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10234 tmp
->n
.sym
->as
->rank
= e
->rank
;
10235 tmp
->n
.sym
->attr
.allocatable
= 1;
10236 tmp
->n
.sym
->attr
.dimension
= 1;
10239 tmp
->n
.sym
->attr
.dimension
= 0;
10241 gfc_set_sym_referenced (tmp
->n
.sym
);
10242 gfc_commit_symbol (tmp
->n
.sym
);
10243 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10245 /* Should the lhs be a section, use its array ref for the
10246 temporary expression. */
10247 if (aref
&& aref
->type
!= AR_FULL
)
10249 gfc_free_ref_list (e
->ref
);
10250 e
->ref
= gfc_copy_ref (ref
);
10256 /* Add one line of code to the code chain, making sure that 'head' and
10257 'tail' are appropriately updated. */
10260 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10262 gcc_assert (this_code
);
10264 *head
= *tail
= *this_code
;
10266 *tail
= gfc_append_code (*tail
, *this_code
);
10271 /* Counts the potential number of part array references that would
10272 result from resolution of typebound defined assignments. */
10275 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10278 int c_depth
= 0, t_depth
;
10280 for (c
= derived
->components
; c
; c
= c
->next
)
10282 if ((!gfc_bt_struct (c
->ts
.type
)
10284 || c
->attr
.allocatable
10285 || c
->attr
.proc_pointer_comp
10286 || c
->attr
.class_pointer
10287 || c
->attr
.proc_pointer
)
10288 && !c
->attr
.defined_assign_comp
)
10291 if (c
->as
&& c_depth
== 0)
10294 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10295 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10300 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10302 return depth
+ c_depth
;
10306 /* Implement 7.2.1.3 of the F08 standard:
10307 "An intrinsic assignment where the variable is of derived type is
10308 performed as if each component of the variable were assigned from the
10309 corresponding component of expr using pointer assignment (7.2.2) for
10310 each pointer component, defined assignment for each nonpointer
10311 nonallocatable component of a type that has a type-bound defined
10312 assignment consistent with the component, intrinsic assignment for
10313 each other nonpointer nonallocatable component, ..."
10315 The pointer assignments are taken care of by the intrinsic
10316 assignment of the structure itself. This function recursively adds
10317 defined assignments where required. The recursion is accomplished
10318 by calling gfc_resolve_code.
10320 When the lhs in a defined assignment has intent INOUT, we need a
10321 temporary for the lhs. In pseudo-code:
10323 ! Only call function lhs once.
10324 if (lhs is not a constant or an variable)
10327 ! Do the intrinsic assignment
10329 ! Now do the defined assignments
10330 do over components with typebound defined assignment [%cmp]
10331 #if one component's assignment procedure is INOUT
10333 #if expr2 non-variable
10339 t1%cmp {defined=} expr2%cmp
10345 expr1%cmp {defined=} expr2%cmp
10349 /* The temporary assignments have to be put on top of the additional
10350 code to avoid the result being changed by the intrinsic assignment.
10352 static int component_assignment_level
= 0;
10353 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10356 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10358 gfc_component
*comp1
, *comp2
;
10359 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10361 int error_count
, depth
;
10363 gfc_get_errors (NULL
, &error_count
);
10365 /* Filter out continuing processing after an error. */
10367 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10368 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10371 /* TODO: Handle more than one part array reference in assignments. */
10372 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10373 (*code
)->expr1
->rank
? 1 : 0);
10376 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10377 "done because multiple part array references would "
10378 "occur in intermediate expressions.", &(*code
)->loc
);
10382 component_assignment_level
++;
10384 /* Create a temporary so that functions get called only once. */
10385 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10386 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10388 gfc_expr
*tmp_expr
;
10390 /* Assign the rhs to the temporary. */
10391 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10392 this_code
= build_assignment (EXEC_ASSIGN
,
10393 tmp_expr
, (*code
)->expr2
,
10394 NULL
, NULL
, (*code
)->loc
);
10395 /* Add the code and substitute the rhs expression. */
10396 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10397 gfc_free_expr ((*code
)->expr2
);
10398 (*code
)->expr2
= tmp_expr
;
10401 /* Do the intrinsic assignment. This is not needed if the lhs is one
10402 of the temporaries generated here, since the intrinsic assignment
10403 to the final result already does this. */
10404 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10406 this_code
= build_assignment (EXEC_ASSIGN
,
10407 (*code
)->expr1
, (*code
)->expr2
,
10408 NULL
, NULL
, (*code
)->loc
);
10409 add_code_to_chain (&this_code
, &head
, &tail
);
10412 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10413 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10416 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10418 bool inout
= false;
10420 /* The intrinsic assignment does the right thing for pointers
10421 of all kinds and allocatable components. */
10422 if (!gfc_bt_struct (comp1
->ts
.type
)
10423 || comp1
->attr
.pointer
10424 || comp1
->attr
.allocatable
10425 || comp1
->attr
.proc_pointer_comp
10426 || comp1
->attr
.class_pointer
10427 || comp1
->attr
.proc_pointer
)
10430 /* Make an assigment for this component. */
10431 this_code
= build_assignment (EXEC_ASSIGN
,
10432 (*code
)->expr1
, (*code
)->expr2
,
10433 comp1
, comp2
, (*code
)->loc
);
10435 /* Convert the assignment if there is a defined assignment for
10436 this type. Otherwise, using the call from gfc_resolve_code,
10437 recurse into its components. */
10438 gfc_resolve_code (this_code
, ns
);
10440 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10442 gfc_formal_arglist
*dummy_args
;
10444 /* Check that there is a typebound defined assignment. If not,
10445 then this must be a module defined assignment. We cannot
10446 use the defined_assign_comp attribute here because it must
10447 be this derived type that has the defined assignment and not
10449 if (!(comp1
->ts
.u
.derived
->f2k_derived
10450 && comp1
->ts
.u
.derived
->f2k_derived
10451 ->tb_op
[INTRINSIC_ASSIGN
]))
10453 gfc_free_statements (this_code
);
10458 /* If the first argument of the subroutine has intent INOUT
10459 a temporary must be generated and used instead. */
10460 rsym
= this_code
->resolved_sym
;
10461 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10463 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10465 gfc_code
*temp_code
;
10468 /* Build the temporary required for the assignment and put
10469 it at the head of the generated code. */
10472 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10473 temp_code
= build_assignment (EXEC_ASSIGN
,
10474 t1
, (*code
)->expr1
,
10475 NULL
, NULL
, (*code
)->loc
);
10477 /* For allocatable LHS, check whether it is allocated. Note
10478 that allocatable components with defined assignment are
10479 not yet support. See PR 57696. */
10480 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10484 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10485 block
= gfc_get_code (EXEC_IF
);
10486 block
->block
= gfc_get_code (EXEC_IF
);
10487 block
->block
->expr1
10488 = gfc_build_intrinsic_call (ns
,
10489 GFC_ISYM_ALLOCATED
, "allocated",
10490 (*code
)->loc
, 1, e
);
10491 block
->block
->next
= temp_code
;
10494 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10497 /* Replace the first actual arg with the component of the
10499 gfc_free_expr (this_code
->ext
.actual
->expr
);
10500 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10501 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10503 /* If the LHS variable is allocatable and wasn't allocated and
10504 the temporary is allocatable, pointer assign the address of
10505 the freshly allocated LHS to the temporary. */
10506 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10507 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10512 cond
= gfc_get_expr ();
10513 cond
->ts
.type
= BT_LOGICAL
;
10514 cond
->ts
.kind
= gfc_default_logical_kind
;
10515 cond
->expr_type
= EXPR_OP
;
10516 cond
->where
= (*code
)->loc
;
10517 cond
->value
.op
.op
= INTRINSIC_NOT
;
10518 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10519 GFC_ISYM_ALLOCATED
, "allocated",
10520 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10521 block
= gfc_get_code (EXEC_IF
);
10522 block
->block
= gfc_get_code (EXEC_IF
);
10523 block
->block
->expr1
= cond
;
10524 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10525 t1
, (*code
)->expr1
,
10526 NULL
, NULL
, (*code
)->loc
);
10527 add_code_to_chain (&block
, &head
, &tail
);
10531 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10533 /* Don't add intrinsic assignments since they are already
10534 effected by the intrinsic assignment of the structure. */
10535 gfc_free_statements (this_code
);
10540 add_code_to_chain (&this_code
, &head
, &tail
);
10544 /* Transfer the value to the final result. */
10545 this_code
= build_assignment (EXEC_ASSIGN
,
10546 (*code
)->expr1
, t1
,
10547 comp1
, comp2
, (*code
)->loc
);
10548 add_code_to_chain (&this_code
, &head
, &tail
);
10552 /* Put the temporary assignments at the top of the generated code. */
10553 if (tmp_head
&& component_assignment_level
== 1)
10555 gfc_append_code (tmp_head
, head
);
10557 tmp_head
= tmp_tail
= NULL
;
10560 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10561 // not accidentally deallocated. Hence, nullify t1.
10562 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10563 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10569 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10570 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10571 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10572 block
= gfc_get_code (EXEC_IF
);
10573 block
->block
= gfc_get_code (EXEC_IF
);
10574 block
->block
->expr1
= cond
;
10575 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10576 t1
, gfc_get_null_expr (&(*code
)->loc
),
10577 NULL
, NULL
, (*code
)->loc
);
10578 gfc_append_code (tail
, block
);
10582 /* Now attach the remaining code chain to the input code. Step on
10583 to the end of the new code since resolution is complete. */
10584 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10585 tail
->next
= (*code
)->next
;
10586 /* Overwrite 'code' because this would place the intrinsic assignment
10587 before the temporary for the lhs is created. */
10588 gfc_free_expr ((*code
)->expr1
);
10589 gfc_free_expr ((*code
)->expr2
);
10595 component_assignment_level
--;
10599 /* F2008: Pointer function assignments are of the form:
10600 ptr_fcn (args) = expr
10601 This function breaks these assignments into two statements:
10602 temporary_pointer => ptr_fcn(args)
10603 temporary_pointer = expr */
10606 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10608 gfc_expr
*tmp_ptr_expr
;
10609 gfc_code
*this_code
;
10610 gfc_component
*comp
;
10613 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10616 /* Even if standard does not support this feature, continue to build
10617 the two statements to avoid upsetting frontend_passes.c. */
10618 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10619 "%L", &(*code
)->loc
);
10621 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10624 s
= comp
->ts
.interface
;
10626 s
= (*code
)->expr1
->symtree
->n
.sym
;
10628 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10630 gfc_error ("The function result on the lhs of the assignment at "
10631 "%L must have the pointer attribute.",
10632 &(*code
)->expr1
->where
);
10633 (*code
)->op
= EXEC_NOP
;
10637 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10639 /* get_temp_from_expression is set up for ordinary assignments. To that
10640 end, where array bounds are not known, arrays are made allocatable.
10641 Change the temporary to a pointer here. */
10642 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10643 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10644 tmp_ptr_expr
->where
= (*code
)->loc
;
10646 this_code
= build_assignment (EXEC_ASSIGN
,
10647 tmp_ptr_expr
, (*code
)->expr2
,
10648 NULL
, NULL
, (*code
)->loc
);
10649 this_code
->next
= (*code
)->next
;
10650 (*code
)->next
= this_code
;
10651 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10652 (*code
)->expr2
= (*code
)->expr1
;
10653 (*code
)->expr1
= tmp_ptr_expr
;
10659 /* Deferred character length assignments from an operator expression
10660 require a temporary because the character length of the lhs can
10661 change in the course of the assignment. */
10664 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10666 gfc_expr
*tmp_expr
;
10667 gfc_code
*this_code
;
10669 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10670 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10671 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10674 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10677 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10678 tmp_expr
->where
= (*code
)->loc
;
10680 /* A new charlen is required to ensure that the variable string
10681 length is different to that of the original lhs. */
10682 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10683 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10684 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10685 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10687 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10689 this_code
= build_assignment (EXEC_ASSIGN
,
10691 gfc_copy_expr (tmp_expr
),
10692 NULL
, NULL
, (*code
)->loc
);
10694 (*code
)->expr1
= tmp_expr
;
10696 this_code
->next
= (*code
)->next
;
10697 (*code
)->next
= this_code
;
10703 /* Given a block of code, recursively resolve everything pointed to by this
10707 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
10709 int omp_workshare_save
;
10710 int forall_save
, do_concurrent_save
;
10714 frame
.prev
= cs_base
;
10718 find_reachable_labels (code
);
10720 for (; code
; code
= code
->next
)
10722 frame
.current
= code
;
10723 forall_save
= forall_flag
;
10724 do_concurrent_save
= gfc_do_concurrent_flag
;
10726 if (code
->op
== EXEC_FORALL
)
10729 gfc_resolve_forall (code
, ns
, forall_save
);
10732 else if (code
->block
)
10734 omp_workshare_save
= -1;
10737 case EXEC_OACC_PARALLEL_LOOP
:
10738 case EXEC_OACC_PARALLEL
:
10739 case EXEC_OACC_KERNELS_LOOP
:
10740 case EXEC_OACC_KERNELS
:
10741 case EXEC_OACC_DATA
:
10742 case EXEC_OACC_HOST_DATA
:
10743 case EXEC_OACC_LOOP
:
10744 gfc_resolve_oacc_blocks (code
, ns
);
10746 case EXEC_OMP_PARALLEL_WORKSHARE
:
10747 omp_workshare_save
= omp_workshare_flag
;
10748 omp_workshare_flag
= 1;
10749 gfc_resolve_omp_parallel_blocks (code
, ns
);
10751 case EXEC_OMP_PARALLEL
:
10752 case EXEC_OMP_PARALLEL_DO
:
10753 case EXEC_OMP_PARALLEL_DO_SIMD
:
10754 case EXEC_OMP_PARALLEL_SECTIONS
:
10755 case EXEC_OMP_TARGET_PARALLEL
:
10756 case EXEC_OMP_TARGET_PARALLEL_DO
:
10757 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10758 case EXEC_OMP_TARGET_TEAMS
:
10759 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10760 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10761 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10762 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10763 case EXEC_OMP_TASK
:
10764 case EXEC_OMP_TEAMS
:
10765 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10766 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10767 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10768 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10769 omp_workshare_save
= omp_workshare_flag
;
10770 omp_workshare_flag
= 0;
10771 gfc_resolve_omp_parallel_blocks (code
, ns
);
10773 case EXEC_OMP_DISTRIBUTE
:
10774 case EXEC_OMP_DISTRIBUTE_SIMD
:
10776 case EXEC_OMP_DO_SIMD
:
10777 case EXEC_OMP_SIMD
:
10778 case EXEC_OMP_TARGET_SIMD
:
10779 case EXEC_OMP_TASKLOOP
:
10780 case EXEC_OMP_TASKLOOP_SIMD
:
10781 gfc_resolve_omp_do_blocks (code
, ns
);
10783 case EXEC_SELECT_TYPE
:
10784 /* Blocks are handled in resolve_select_type because we have
10785 to transform the SELECT TYPE into ASSOCIATE first. */
10787 case EXEC_DO_CONCURRENT
:
10788 gfc_do_concurrent_flag
= 1;
10789 gfc_resolve_blocks (code
->block
, ns
);
10790 gfc_do_concurrent_flag
= 2;
10792 case EXEC_OMP_WORKSHARE
:
10793 omp_workshare_save
= omp_workshare_flag
;
10794 omp_workshare_flag
= 1;
10797 gfc_resolve_blocks (code
->block
, ns
);
10801 if (omp_workshare_save
!= -1)
10802 omp_workshare_flag
= omp_workshare_save
;
10806 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
10807 t
= gfc_resolve_expr (code
->expr1
);
10808 forall_flag
= forall_save
;
10809 gfc_do_concurrent_flag
= do_concurrent_save
;
10811 if (!gfc_resolve_expr (code
->expr2
))
10814 if (code
->op
== EXEC_ALLOCATE
10815 && !gfc_resolve_expr (code
->expr3
))
10821 case EXEC_END_BLOCK
:
10822 case EXEC_END_NESTED_BLOCK
:
10826 case EXEC_ERROR_STOP
:
10828 case EXEC_CONTINUE
:
10830 case EXEC_ASSIGN_CALL
:
10833 case EXEC_CRITICAL
:
10834 resolve_critical (code
);
10837 case EXEC_SYNC_ALL
:
10838 case EXEC_SYNC_IMAGES
:
10839 case EXEC_SYNC_MEMORY
:
10840 resolve_sync (code
);
10845 case EXEC_EVENT_POST
:
10846 case EXEC_EVENT_WAIT
:
10847 resolve_lock_unlock_event (code
);
10851 /* Keep track of which entry we are up to. */
10852 current_entry_id
= code
->ext
.entry
->id
;
10856 resolve_where (code
, NULL
);
10860 if (code
->expr1
!= NULL
)
10862 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
10863 gfc_error ("ASSIGNED GOTO statement at %L requires an "
10864 "INTEGER variable", &code
->expr1
->where
);
10865 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
10866 gfc_error ("Variable %qs has not been assigned a target "
10867 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
10868 &code
->expr1
->where
);
10871 resolve_branch (code
->label1
, code
);
10875 if (code
->expr1
!= NULL
10876 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
10877 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
10878 "INTEGER return specifier", &code
->expr1
->where
);
10881 case EXEC_INIT_ASSIGN
:
10882 case EXEC_END_PROCEDURE
:
10889 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
10891 if (code
->expr1
->expr_type
== EXPR_FUNCTION
10892 && code
->expr1
->value
.function
.isym
10893 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10894 remove_caf_get_intrinsic (code
->expr1
);
10896 /* If this is a pointer function in an lvalue variable context,
10897 the new code will have to be resolved afresh. This is also the
10898 case with an error, where the code is transformed into NOP to
10899 prevent ICEs downstream. */
10900 if (resolve_ptr_fcn_assign (&code
, ns
)
10901 || code
->op
== EXEC_NOP
)
10904 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
10908 if (resolve_ordinary_assign (code
, ns
))
10910 if (code
->op
== EXEC_COMPCALL
)
10916 /* Check for dependencies in deferred character length array
10917 assignments and generate a temporary, if necessary. */
10918 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
10921 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
10922 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
10923 && code
->expr1
->ts
.u
.derived
10924 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
10925 generate_component_assignments (&code
, ns
);
10929 case EXEC_LABEL_ASSIGN
:
10930 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
10931 gfc_error ("Label %d referenced at %L is never defined",
10932 code
->label1
->value
, &code
->label1
->where
);
10934 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
10935 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
10936 || code
->expr1
->symtree
->n
.sym
->ts
.kind
10937 != gfc_default_integer_kind
10938 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
10939 gfc_error ("ASSIGN statement at %L requires a scalar "
10940 "default INTEGER variable", &code
->expr1
->where
);
10943 case EXEC_POINTER_ASSIGN
:
10950 /* This is both a variable definition and pointer assignment
10951 context, so check both of them. For rank remapping, a final
10952 array ref may be present on the LHS and fool gfc_expr_attr
10953 used in gfc_check_vardef_context. Remove it. */
10954 e
= remove_last_array_ref (code
->expr1
);
10955 t
= gfc_check_vardef_context (e
, true, false, false,
10956 _("pointer assignment"));
10958 t
= gfc_check_vardef_context (e
, false, false, false,
10959 _("pointer assignment"));
10964 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
10966 /* Assigning a class object always is a regular assign. */
10967 if (code
->expr2
->ts
.type
== BT_CLASS
10968 && !CLASS_DATA (code
->expr2
)->attr
.dimension
10969 && !(UNLIMITED_POLY (code
->expr2
)
10970 && code
->expr1
->ts
.type
== BT_DERIVED
10971 && (code
->expr1
->ts
.u
.derived
->attr
.sequence
10972 || code
->expr1
->ts
.u
.derived
->attr
.is_bind_c
))
10973 && !(gfc_expr_attr (code
->expr1
).proc_pointer
10974 && code
->expr2
->expr_type
== EXPR_VARIABLE
10975 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
10977 code
->op
= EXEC_ASSIGN
;
10981 case EXEC_ARITHMETIC_IF
:
10983 gfc_expr
*e
= code
->expr1
;
10985 gfc_resolve_expr (e
);
10986 if (e
->expr_type
== EXPR_NULL
)
10987 gfc_error ("Invalid NULL at %L", &e
->where
);
10989 if (t
&& (e
->rank
> 0
10990 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
10991 gfc_error ("Arithmetic IF statement at %L requires a scalar "
10992 "REAL or INTEGER expression", &e
->where
);
10994 resolve_branch (code
->label1
, code
);
10995 resolve_branch (code
->label2
, code
);
10996 resolve_branch (code
->label3
, code
);
11001 if (t
&& code
->expr1
!= NULL
11002 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11003 || code
->expr1
->rank
!= 0))
11004 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11005 &code
->expr1
->where
);
11010 resolve_call (code
);
11013 case EXEC_COMPCALL
:
11015 resolve_typebound_subroutine (code
);
11018 case EXEC_CALL_PPC
:
11019 resolve_ppc_call (code
);
11023 /* Select is complicated. Also, a SELECT construct could be
11024 a transformed computed GOTO. */
11025 resolve_select (code
, false);
11028 case EXEC_SELECT_TYPE
:
11029 resolve_select_type (code
, ns
);
11033 resolve_block_construct (code
);
11037 if (code
->ext
.iterator
!= NULL
)
11039 gfc_iterator
*iter
= code
->ext
.iterator
;
11040 if (gfc_resolve_iterator (iter
, true, false))
11041 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
);
11045 case EXEC_DO_WHILE
:
11046 if (code
->expr1
== NULL
)
11047 gfc_internal_error ("gfc_resolve_code(): No expression on "
11050 && (code
->expr1
->rank
!= 0
11051 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11052 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11053 "a scalar LOGICAL expression", &code
->expr1
->where
);
11056 case EXEC_ALLOCATE
:
11058 resolve_allocate_deallocate (code
, "ALLOCATE");
11062 case EXEC_DEALLOCATE
:
11064 resolve_allocate_deallocate (code
, "DEALLOCATE");
11069 if (!gfc_resolve_open (code
->ext
.open
))
11072 resolve_branch (code
->ext
.open
->err
, code
);
11076 if (!gfc_resolve_close (code
->ext
.close
))
11079 resolve_branch (code
->ext
.close
->err
, code
);
11082 case EXEC_BACKSPACE
:
11086 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11089 resolve_branch (code
->ext
.filepos
->err
, code
);
11093 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11096 resolve_branch (code
->ext
.inquire
->err
, code
);
11099 case EXEC_IOLENGTH
:
11100 gcc_assert (code
->ext
.inquire
!= NULL
);
11101 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11104 resolve_branch (code
->ext
.inquire
->err
, code
);
11108 if (!gfc_resolve_wait (code
->ext
.wait
))
11111 resolve_branch (code
->ext
.wait
->err
, code
);
11112 resolve_branch (code
->ext
.wait
->end
, code
);
11113 resolve_branch (code
->ext
.wait
->eor
, code
);
11118 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11121 resolve_branch (code
->ext
.dt
->err
, code
);
11122 resolve_branch (code
->ext
.dt
->end
, code
);
11123 resolve_branch (code
->ext
.dt
->eor
, code
);
11126 case EXEC_TRANSFER
:
11127 resolve_transfer (code
);
11130 case EXEC_DO_CONCURRENT
:
11132 resolve_forall_iterators (code
->ext
.forall_iterator
);
11134 if (code
->expr1
!= NULL
11135 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11136 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11137 "expression", &code
->expr1
->where
);
11140 case EXEC_OACC_PARALLEL_LOOP
:
11141 case EXEC_OACC_PARALLEL
:
11142 case EXEC_OACC_KERNELS_LOOP
:
11143 case EXEC_OACC_KERNELS
:
11144 case EXEC_OACC_DATA
:
11145 case EXEC_OACC_HOST_DATA
:
11146 case EXEC_OACC_LOOP
:
11147 case EXEC_OACC_UPDATE
:
11148 case EXEC_OACC_WAIT
:
11149 case EXEC_OACC_CACHE
:
11150 case EXEC_OACC_ENTER_DATA
:
11151 case EXEC_OACC_EXIT_DATA
:
11152 case EXEC_OACC_ATOMIC
:
11153 case EXEC_OACC_DECLARE
:
11154 gfc_resolve_oacc_directive (code
, ns
);
11157 case EXEC_OMP_ATOMIC
:
11158 case EXEC_OMP_BARRIER
:
11159 case EXEC_OMP_CANCEL
:
11160 case EXEC_OMP_CANCELLATION_POINT
:
11161 case EXEC_OMP_CRITICAL
:
11162 case EXEC_OMP_FLUSH
:
11163 case EXEC_OMP_DISTRIBUTE
:
11164 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11165 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11166 case EXEC_OMP_DISTRIBUTE_SIMD
:
11168 case EXEC_OMP_DO_SIMD
:
11169 case EXEC_OMP_MASTER
:
11170 case EXEC_OMP_ORDERED
:
11171 case EXEC_OMP_SECTIONS
:
11172 case EXEC_OMP_SIMD
:
11173 case EXEC_OMP_SINGLE
:
11174 case EXEC_OMP_TARGET
:
11175 case EXEC_OMP_TARGET_DATA
:
11176 case EXEC_OMP_TARGET_ENTER_DATA
:
11177 case EXEC_OMP_TARGET_EXIT_DATA
:
11178 case EXEC_OMP_TARGET_PARALLEL
:
11179 case EXEC_OMP_TARGET_PARALLEL_DO
:
11180 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11181 case EXEC_OMP_TARGET_SIMD
:
11182 case EXEC_OMP_TARGET_TEAMS
:
11183 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11184 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11185 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11186 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11187 case EXEC_OMP_TARGET_UPDATE
:
11188 case EXEC_OMP_TASK
:
11189 case EXEC_OMP_TASKGROUP
:
11190 case EXEC_OMP_TASKLOOP
:
11191 case EXEC_OMP_TASKLOOP_SIMD
:
11192 case EXEC_OMP_TASKWAIT
:
11193 case EXEC_OMP_TASKYIELD
:
11194 case EXEC_OMP_TEAMS
:
11195 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11196 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11197 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11198 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11199 case EXEC_OMP_WORKSHARE
:
11200 gfc_resolve_omp_directive (code
, ns
);
11203 case EXEC_OMP_PARALLEL
:
11204 case EXEC_OMP_PARALLEL_DO
:
11205 case EXEC_OMP_PARALLEL_DO_SIMD
:
11206 case EXEC_OMP_PARALLEL_SECTIONS
:
11207 case EXEC_OMP_PARALLEL_WORKSHARE
:
11208 omp_workshare_save
= omp_workshare_flag
;
11209 omp_workshare_flag
= 0;
11210 gfc_resolve_omp_directive (code
, ns
);
11211 omp_workshare_flag
= omp_workshare_save
;
11215 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11219 cs_base
= frame
.prev
;
11223 /* Resolve initial values and make sure they are compatible with
11227 resolve_values (gfc_symbol
*sym
)
11231 if (sym
->value
== NULL
)
11234 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11235 t
= resolve_structure_cons (sym
->value
, 1);
11237 t
= gfc_resolve_expr (sym
->value
);
11242 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11246 /* Verify any BIND(C) derived types in the namespace so we can report errors
11247 for them once, rather than for each variable declared of that type. */
11250 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11252 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11253 && derived_sym
->attr
.is_bind_c
== 1)
11254 verify_bind_c_derived_type (derived_sym
);
11260 /* Check the interfaces of DTIO procedures associated with derived
11261 type 'sym'. These procedures can either have typebound bindings or
11262 can appear in DTIO generic interfaces. */
11265 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11267 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11270 gfc_check_dtio_interfaces (sym
);
11275 /* Verify that any binding labels used in a given namespace do not collide
11276 with the names or binding labels of any global symbols. Multiple INTERFACE
11277 for the same procedure are permitted. */
11280 gfc_verify_binding_labels (gfc_symbol
*sym
)
11283 const char *module
;
11285 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11286 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11289 gsym
= gfc_find_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11292 module
= sym
->module
;
11293 else if (sym
->ns
&& sym
->ns
->proc_name
11294 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11295 module
= sym
->ns
->proc_name
->name
;
11296 else if (sym
->ns
&& sym
->ns
->parent
11297 && sym
->ns
&& sym
->ns
->parent
->proc_name
11298 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11299 module
= sym
->ns
->parent
->proc_name
->name
;
11305 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11308 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11309 gsym
->where
= sym
->declared_at
;
11310 gsym
->sym_name
= sym
->name
;
11311 gsym
->binding_label
= sym
->binding_label
;
11312 gsym
->ns
= sym
->ns
;
11313 gsym
->mod_name
= module
;
11314 if (sym
->attr
.function
)
11315 gsym
->type
= GSYM_FUNCTION
;
11316 else if (sym
->attr
.subroutine
)
11317 gsym
->type
= GSYM_SUBROUTINE
;
11318 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11319 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11323 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11325 gfc_error ("Variable %s with binding label %s at %L uses the same global "
11326 "identifier as entity at %L", sym
->name
,
11327 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11328 /* Clear the binding label to prevent checking multiple times. */
11329 sym
->binding_label
= NULL
;
11332 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11333 && (strcmp (module
, gsym
->mod_name
) != 0
11334 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11336 /* This can only happen if the variable is defined in a module - if it
11337 isn't the same module, reject it. */
11338 gfc_error ("Variable %s from module %s with binding label %s at %L uses "
11339 "the same global identifier as entity at %L from module %s",
11340 sym
->name
, module
, sym
->binding_label
,
11341 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11342 sym
->binding_label
= NULL
;
11344 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11345 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11346 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11347 && sym
!= gsym
->ns
->proc_name
11348 && (module
!= gsym
->mod_name
11349 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11350 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11352 /* Print an error if the procedure is defined multiple times; we have to
11353 exclude references to the same procedure via module association or
11354 multiple checks for the same procedure. */
11355 gfc_error ("Procedure %s with binding label %s at %L uses the same "
11356 "global identifier as entity at %L", sym
->name
,
11357 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11358 sym
->binding_label
= NULL
;
11363 /* Resolve an index expression. */
11366 resolve_index_expr (gfc_expr
*e
)
11368 if (!gfc_resolve_expr (e
))
11371 if (!gfc_simplify_expr (e
, 0))
11374 if (!gfc_specification_expr (e
))
11381 /* Resolve a charlen structure. */
11384 resolve_charlen (gfc_charlen
*cl
)
11387 bool saved_specification_expr
;
11393 saved_specification_expr
= specification_expr
;
11394 specification_expr
= true;
11396 if (cl
->length_from_typespec
)
11398 if (!gfc_resolve_expr (cl
->length
))
11400 specification_expr
= saved_specification_expr
;
11404 if (!gfc_simplify_expr (cl
->length
, 0))
11406 specification_expr
= saved_specification_expr
;
11413 if (!resolve_index_expr (cl
->length
))
11415 specification_expr
= saved_specification_expr
;
11420 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11421 a negative value, the length of character entities declared is zero. */
11422 if (cl
->length
&& !gfc_extract_int (cl
->length
, &i
) && i
< 0)
11423 gfc_replace_expr (cl
->length
,
11424 gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 0));
11426 /* Check that the character length is not too large. */
11427 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11428 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11429 && cl
->length
->ts
.type
== BT_INTEGER
11430 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11432 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11433 specification_expr
= saved_specification_expr
;
11437 specification_expr
= saved_specification_expr
;
11442 /* Test for non-constant shape arrays. */
11445 is_non_constant_shape_array (gfc_symbol
*sym
)
11451 not_constant
= false;
11452 if (sym
->as
!= NULL
)
11454 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11455 has not been simplified; parameter array references. Do the
11456 simplification now. */
11457 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11459 e
= sym
->as
->lower
[i
];
11460 if (e
&& (!resolve_index_expr(e
)
11461 || !gfc_is_constant_expr (e
)))
11462 not_constant
= true;
11463 e
= sym
->as
->upper
[i
];
11464 if (e
&& (!resolve_index_expr(e
)
11465 || !gfc_is_constant_expr (e
)))
11466 not_constant
= true;
11469 return not_constant
;
11472 /* Given a symbol and an initialization expression, add code to initialize
11473 the symbol to the function entry. */
11475 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11479 gfc_namespace
*ns
= sym
->ns
;
11481 /* Search for the function namespace if this is a contained
11482 function without an explicit result. */
11483 if (sym
->attr
.function
&& sym
== sym
->result
11484 && sym
->name
!= sym
->ns
->proc_name
->name
)
11486 ns
= ns
->contained
;
11487 for (;ns
; ns
= ns
->sibling
)
11488 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11494 gfc_free_expr (init
);
11498 /* Build an l-value expression for the result. */
11499 lval
= gfc_lval_expr_from_sym (sym
);
11501 /* Add the code at scope entry. */
11502 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11503 init_st
->next
= ns
->code
;
11504 ns
->code
= init_st
;
11506 /* Assign the default initializer to the l-value. */
11507 init_st
->loc
= sym
->declared_at
;
11508 init_st
->expr1
= lval
;
11509 init_st
->expr2
= init
;
11513 /* Whether or not we can generate a default initializer for a symbol. */
11516 can_generate_init (gfc_symbol
*sym
)
11518 symbol_attribute
*a
;
11523 /* These symbols should never have a default initialization. */
11528 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11529 && (CLASS_DATA (sym
)->attr
.class_pointer
11530 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11531 || a
->in_equivalence
11538 || (!a
->referenced
&& !a
->result
)
11539 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11540 || (a
->function
&& sym
!= sym
->result
)
11545 /* Assign the default initializer to a derived type variable or result. */
11548 apply_default_init (gfc_symbol
*sym
)
11550 gfc_expr
*init
= NULL
;
11552 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11555 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11556 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11558 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11561 build_init_assign (sym
, init
);
11562 sym
->attr
.referenced
= 1;
11566 /* Build an initializer for a local. Returns null if the symbol should not have
11567 a default initialization. */
11570 build_default_init_expr (gfc_symbol
*sym
)
11572 /* These symbols should never have a default initialization. */
11573 if (sym
->attr
.allocatable
11574 || sym
->attr
.external
11576 || sym
->attr
.pointer
11577 || sym
->attr
.in_equivalence
11578 || sym
->attr
.in_common
11581 || sym
->attr
.cray_pointee
11582 || sym
->attr
.cray_pointer
11586 /* Get the appropriate init expression. */
11587 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11590 /* Add an initialization expression to a local variable. */
11592 apply_default_init_local (gfc_symbol
*sym
)
11594 gfc_expr
*init
= NULL
;
11596 /* The symbol should be a variable or a function return value. */
11597 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11598 || (sym
->attr
.function
&& sym
->result
!= sym
))
11601 /* Try to build the initializer expression. If we can't initialize
11602 this symbol, then init will be NULL. */
11603 init
= build_default_init_expr (sym
);
11607 /* For saved variables, we don't want to add an initializer at function
11608 entry, so we just add a static initializer. Note that automatic variables
11609 are stack allocated even with -fno-automatic; we have also to exclude
11610 result variable, which are also nonstatic. */
11611 if (!sym
->attr
.automatic
11612 && (sym
->attr
.save
|| sym
->ns
->save_all
11613 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11614 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11615 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11617 /* Don't clobber an existing initializer! */
11618 gcc_assert (sym
->value
== NULL
);
11623 build_init_assign (sym
, init
);
11627 /* Resolution of common features of flavors variable and procedure. */
11630 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11632 gfc_array_spec
*as
;
11634 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11635 as
= CLASS_DATA (sym
)->as
;
11639 /* Constraints on deferred shape variable. */
11640 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11642 bool pointer
, allocatable
, dimension
;
11644 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11646 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11647 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11648 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11652 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11653 allocatable
= sym
->attr
.allocatable
;
11654 dimension
= sym
->attr
.dimension
;
11659 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11661 gfc_error ("Allocatable array %qs at %L must have a deferred "
11662 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
11665 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
11666 "%qs at %L may not be ALLOCATABLE",
11667 sym
->name
, &sym
->declared_at
))
11671 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11673 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
11674 "assumed rank", sym
->name
, &sym
->declared_at
);
11680 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
11681 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
11683 gfc_error ("Array %qs at %L cannot have a deferred shape",
11684 sym
->name
, &sym
->declared_at
);
11689 /* Constraints on polymorphic variables. */
11690 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
11693 if (sym
->attr
.class_ok
11694 && !sym
->attr
.select_type_temporary
11695 && !UNLIMITED_POLY (sym
)
11696 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
11698 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
11699 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
11700 &sym
->declared_at
);
11705 /* Assume that use associated symbols were checked in the module ns.
11706 Class-variables that are associate-names are also something special
11707 and excepted from the test. */
11708 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
11710 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
11711 "or pointer", sym
->name
, &sym
->declared_at
);
11720 /* Additional checks for symbols with flavor variable and derived
11721 type. To be called from resolve_fl_variable. */
11724 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
11726 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
11728 /* Check to see if a derived type is blocked from being host
11729 associated by the presence of another class I symbol in the same
11730 namespace. 14.6.1.3 of the standard and the discussion on
11731 comp.lang.fortran. */
11732 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
11733 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
11736 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
11737 if (s
&& s
->attr
.generic
)
11738 s
= gfc_find_dt_in_generic (s
);
11739 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
11741 gfc_error ("The type %qs cannot be host associated at %L "
11742 "because it is blocked by an incompatible object "
11743 "of the same name declared at %L",
11744 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
11750 /* 4th constraint in section 11.3: "If an object of a type for which
11751 component-initialization is specified (R429) appears in the
11752 specification-part of a module and does not have the ALLOCATABLE
11753 or POINTER attribute, the object shall have the SAVE attribute."
11755 The check for initializers is performed with
11756 gfc_has_default_initializer because gfc_default_initializer generates
11757 a hidden default for allocatable components. */
11758 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
11759 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11760 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
11761 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
11762 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
11763 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
11764 "%qs at %L, needed due to the default "
11765 "initialization", sym
->name
, &sym
->declared_at
))
11768 /* Assign default initializer. */
11769 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
11770 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
11771 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11777 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
11778 except in the declaration of an entity or component that has the POINTER
11779 or ALLOCATABLE attribute. */
11782 deferred_requirements (gfc_symbol
*sym
)
11784 if (sym
->ts
.deferred
11785 && !(sym
->attr
.pointer
11786 || sym
->attr
.allocatable
11787 || sym
->attr
.omp_udr_artificial_var
))
11789 gfc_error ("Entity %qs at %L has a deferred type parameter and "
11790 "requires either the POINTER or ALLOCATABLE attribute",
11791 sym
->name
, &sym
->declared_at
);
11798 /* Resolve symbols with flavor variable. */
11801 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
11803 int no_init_flag
, automatic_flag
;
11805 const char *auto_save_msg
;
11806 bool saved_specification_expr
;
11808 auto_save_msg
= "Automatic object %qs at %L cannot have the "
11811 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
11814 /* Set this flag to check that variables are parameters of all entries.
11815 This check is effected by the call to gfc_resolve_expr through
11816 is_non_constant_shape_array. */
11817 saved_specification_expr
= specification_expr
;
11818 specification_expr
= true;
11820 if (sym
->ns
->proc_name
11821 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11822 || sym
->ns
->proc_name
->attr
.is_main_program
)
11823 && !sym
->attr
.use_assoc
11824 && !sym
->attr
.allocatable
11825 && !sym
->attr
.pointer
11826 && is_non_constant_shape_array (sym
))
11828 /* F08:C541. The shape of an array defined in a main program or module
11829 * needs to be constant. */
11830 gfc_error ("The module or main program array %qs at %L must "
11831 "have constant shape", sym
->name
, &sym
->declared_at
);
11832 specification_expr
= saved_specification_expr
;
11836 /* Constraints on deferred type parameter. */
11837 if (!deferred_requirements (sym
))
11840 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
11842 /* Make sure that character string variables with assumed length are
11843 dummy arguments. */
11844 e
= sym
->ts
.u
.cl
->length
;
11845 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
11846 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
11847 && !sym
->attr
.omp_udr_artificial_var
)
11849 gfc_error ("Entity with assumed character length at %L must be a "
11850 "dummy argument or a PARAMETER", &sym
->declared_at
);
11851 specification_expr
= saved_specification_expr
;
11855 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
11857 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
11858 specification_expr
= saved_specification_expr
;
11862 if (!gfc_is_constant_expr (e
)
11863 && !(e
->expr_type
== EXPR_VARIABLE
11864 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
11866 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
11867 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11868 || sym
->ns
->proc_name
->attr
.is_main_program
))
11870 gfc_error ("%qs at %L must have constant character length "
11871 "in this context", sym
->name
, &sym
->declared_at
);
11872 specification_expr
= saved_specification_expr
;
11875 if (sym
->attr
.in_common
)
11877 gfc_error ("COMMON variable %qs at %L must have constant "
11878 "character length", sym
->name
, &sym
->declared_at
);
11879 specification_expr
= saved_specification_expr
;
11885 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
11886 apply_default_init_local (sym
); /* Try to apply a default initialization. */
11888 /* Determine if the symbol may not have an initializer. */
11889 no_init_flag
= automatic_flag
= 0;
11890 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
11891 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
11893 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
11894 && is_non_constant_shape_array (sym
))
11896 no_init_flag
= automatic_flag
= 1;
11898 /* Also, they must not have the SAVE attribute.
11899 SAVE_IMPLICIT is checked below. */
11900 if (sym
->as
&& sym
->attr
.codimension
)
11902 int corank
= sym
->as
->corank
;
11903 sym
->as
->corank
= 0;
11904 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
11905 sym
->as
->corank
= corank
;
11907 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
11909 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
11910 specification_expr
= saved_specification_expr
;
11915 /* Ensure that any initializer is simplified. */
11917 gfc_simplify_expr (sym
->value
, 1);
11919 /* Reject illegal initializers. */
11920 if (!sym
->mark
&& sym
->value
)
11922 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
11923 && CLASS_DATA (sym
)->attr
.allocatable
))
11924 gfc_error ("Allocatable %qs at %L cannot have an initializer",
11925 sym
->name
, &sym
->declared_at
);
11926 else if (sym
->attr
.external
)
11927 gfc_error ("External %qs at %L cannot have an initializer",
11928 sym
->name
, &sym
->declared_at
);
11929 else if (sym
->attr
.dummy
11930 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
11931 gfc_error ("Dummy %qs at %L cannot have an initializer",
11932 sym
->name
, &sym
->declared_at
);
11933 else if (sym
->attr
.intrinsic
)
11934 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
11935 sym
->name
, &sym
->declared_at
);
11936 else if (sym
->attr
.result
)
11937 gfc_error ("Function result %qs at %L cannot have an initializer",
11938 sym
->name
, &sym
->declared_at
);
11939 else if (automatic_flag
)
11940 gfc_error ("Automatic array %qs at %L cannot have an initializer",
11941 sym
->name
, &sym
->declared_at
);
11943 goto no_init_error
;
11944 specification_expr
= saved_specification_expr
;
11949 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
11951 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
11952 specification_expr
= saved_specification_expr
;
11956 specification_expr
= saved_specification_expr
;
11961 /* Compare the dummy characteristics of a module procedure interface
11962 declaration with the corresponding declaration in a submodule. */
11963 static gfc_formal_arglist
*new_formal
;
11964 static char errmsg
[200];
11967 compare_fsyms (gfc_symbol
*sym
)
11971 if (sym
== NULL
|| new_formal
== NULL
)
11974 fsym
= new_formal
->sym
;
11979 if (strcmp (sym
->name
, fsym
->name
) == 0)
11981 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
11982 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
11987 /* Resolve a procedure. */
11990 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
11992 gfc_formal_arglist
*arg
;
11994 if (sym
->attr
.function
11995 && !resolve_fl_var_and_proc (sym
, mp_flag
))
11998 if (sym
->ts
.type
== BT_CHARACTER
)
12000 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12002 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12003 && !resolve_charlen (cl
))
12006 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12007 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12009 gfc_error ("Character-valued statement function %qs at %L must "
12010 "have constant length", sym
->name
, &sym
->declared_at
);
12015 /* Ensure that derived type for are not of a private type. Internal
12016 module procedures are excluded by 2.2.3.3 - i.e., they are not
12017 externally accessible and can access all the objects accessible in
12019 if (!(sym
->ns
->parent
12020 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12021 && gfc_check_symbol_access (sym
))
12023 gfc_interface
*iface
;
12025 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12028 && arg
->sym
->ts
.type
== BT_DERIVED
12029 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12030 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12031 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12032 "and cannot be a dummy argument"
12033 " of %qs, which is PUBLIC at %L",
12034 arg
->sym
->name
, sym
->name
,
12035 &sym
->declared_at
))
12037 /* Stop this message from recurring. */
12038 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12043 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12044 PRIVATE to the containing module. */
12045 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12047 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12050 && arg
->sym
->ts
.type
== BT_DERIVED
12051 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12052 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12053 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12054 "PUBLIC interface %qs at %L "
12055 "takes dummy arguments of %qs which "
12056 "is PRIVATE", iface
->sym
->name
,
12057 sym
->name
, &iface
->sym
->declared_at
,
12058 gfc_typename(&arg
->sym
->ts
)))
12060 /* Stop this message from recurring. */
12061 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12068 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12069 && !sym
->attr
.proc_pointer
)
12071 gfc_error ("Function %qs at %L cannot have an initializer",
12072 sym
->name
, &sym
->declared_at
);
12076 /* An external symbol may not have an initializer because it is taken to be
12077 a procedure. Exception: Procedure Pointers. */
12078 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12080 gfc_error ("External object %qs at %L may not have an initializer",
12081 sym
->name
, &sym
->declared_at
);
12085 /* An elemental function is required to return a scalar 12.7.1 */
12086 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12088 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12089 "result", sym
->name
, &sym
->declared_at
);
12090 /* Reset so that the error only occurs once. */
12091 sym
->attr
.elemental
= 0;
12095 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12096 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12098 gfc_error ("Statement function %qs at %L may not have pointer or "
12099 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12103 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12104 char-len-param shall not be array-valued, pointer-valued, recursive
12105 or pure. ....snip... A character value of * may only be used in the
12106 following ways: (i) Dummy arg of procedure - dummy associates with
12107 actual length; (ii) To declare a named constant; or (iii) External
12108 function - but length must be declared in calling scoping unit. */
12109 if (sym
->attr
.function
12110 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12111 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12113 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12114 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12116 if (sym
->as
&& sym
->as
->rank
)
12117 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12118 "array-valued", sym
->name
, &sym
->declared_at
);
12120 if (sym
->attr
.pointer
)
12121 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12122 "pointer-valued", sym
->name
, &sym
->declared_at
);
12124 if (sym
->attr
.pure
)
12125 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12126 "pure", sym
->name
, &sym
->declared_at
);
12128 if (sym
->attr
.recursive
)
12129 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12130 "recursive", sym
->name
, &sym
->declared_at
);
12135 /* Appendix B.2 of the standard. Contained functions give an
12136 error anyway. Deferred character length is an F2003 feature.
12137 Don't warn on intrinsic conversion functions, which start
12138 with two underscores. */
12139 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12140 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12141 gfc_notify_std (GFC_STD_F95_OBS
,
12142 "CHARACTER(*) function %qs at %L",
12143 sym
->name
, &sym
->declared_at
);
12146 /* F2008, C1218. */
12147 if (sym
->attr
.elemental
)
12149 if (sym
->attr
.proc_pointer
)
12151 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12152 sym
->name
, &sym
->declared_at
);
12155 if (sym
->attr
.dummy
)
12157 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12158 sym
->name
, &sym
->declared_at
);
12163 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12165 gfc_formal_arglist
*curr_arg
;
12166 int has_non_interop_arg
= 0;
12168 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12169 sym
->common_block
))
12171 /* Clear these to prevent looking at them again if there was an
12173 sym
->attr
.is_bind_c
= 0;
12174 sym
->attr
.is_c_interop
= 0;
12175 sym
->ts
.is_c_interop
= 0;
12179 /* So far, no errors have been found. */
12180 sym
->attr
.is_c_interop
= 1;
12181 sym
->ts
.is_c_interop
= 1;
12184 curr_arg
= gfc_sym_get_dummy_args (sym
);
12185 while (curr_arg
!= NULL
)
12187 /* Skip implicitly typed dummy args here. */
12188 if (curr_arg
->sym
->attr
.implicit_type
== 0)
12189 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12190 /* If something is found to fail, record the fact so we
12191 can mark the symbol for the procedure as not being
12192 BIND(C) to try and prevent multiple errors being
12194 has_non_interop_arg
= 1;
12196 curr_arg
= curr_arg
->next
;
12199 /* See if any of the arguments were not interoperable and if so, clear
12200 the procedure symbol to prevent duplicate error messages. */
12201 if (has_non_interop_arg
!= 0)
12203 sym
->attr
.is_c_interop
= 0;
12204 sym
->ts
.is_c_interop
= 0;
12205 sym
->attr
.is_bind_c
= 0;
12209 if (!sym
->attr
.proc_pointer
)
12211 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12213 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12214 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12217 if (sym
->attr
.intent
)
12219 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12220 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12223 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12225 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12226 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12229 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12230 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12231 || sym
->attr
.contained
))
12233 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12234 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12237 if (strcmp ("ppr@", sym
->name
) == 0)
12239 gfc_error ("Procedure pointer result %qs at %L "
12240 "is missing the pointer attribute",
12241 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12246 /* Assume that a procedure whose body is not known has references
12247 to external arrays. */
12248 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12249 sym
->attr
.array_outer_dependency
= 1;
12251 /* Compare the characteristics of a module procedure with the
12252 interface declaration. Ideally this would be done with
12253 gfc_compare_interfaces but, at present, the formal interface
12254 cannot be copied to the ts.interface. */
12255 if (sym
->attr
.module_procedure
12256 && sym
->attr
.if_source
== IFSRC_DECL
)
12259 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12261 char *submodule_name
;
12262 strcpy (name
, sym
->ns
->proc_name
->name
);
12263 module_name
= strtok (name
, ".");
12264 submodule_name
= strtok (NULL
, ".");
12266 iface
= sym
->tlink
;
12269 /* Make sure that the result uses the correct charlen for deferred
12271 if (iface
&& sym
->result
12272 && iface
->ts
.type
== BT_CHARACTER
12273 && iface
->ts
.deferred
)
12274 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12279 /* Check the procedure characteristics. */
12280 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12282 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12283 "PROCEDURE at %L and its interface in %s",
12284 &sym
->declared_at
, module_name
);
12288 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12290 gfc_error ("Mismatch in PURE attribute between MODULE "
12291 "PROCEDURE at %L and its interface in %s",
12292 &sym
->declared_at
, module_name
);
12296 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12298 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12299 "PROCEDURE at %L and its interface in %s",
12300 &sym
->declared_at
, module_name
);
12304 /* Check the result characteristics. */
12305 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12307 gfc_error ("%s between the MODULE PROCEDURE declaration "
12308 "in module %s and the declaration at %L in "
12309 "SUBMODULE %s", errmsg
, module_name
,
12310 &sym
->declared_at
, submodule_name
);
12315 /* Check the characteristics of the formal arguments. */
12316 if (sym
->formal
&& sym
->formal_ns
)
12318 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12321 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12329 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12330 been defined and we now know their defined arguments, check that they fulfill
12331 the requirements of the standard for procedures used as finalizers. */
12334 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12336 gfc_finalizer
* list
;
12337 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12338 bool result
= true;
12339 bool seen_scalar
= false;
12342 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12345 gfc_resolve_finalizers (parent
, finalizable
);
12347 /* Return early when not finalizable. Additionally, ensure that derived-type
12348 components have a their finalizables resolved. */
12349 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->finalizers
)
12351 bool has_final
= false;
12352 for (c
= derived
->components
; c
; c
= c
->next
)
12353 if (c
->ts
.type
== BT_DERIVED
12354 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12356 bool has_final2
= false;
12357 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final
))
12358 return false; /* Error. */
12359 has_final
= has_final
|| has_final2
;
12364 *finalizable
= false;
12369 /* Walk over the list of finalizer-procedures, check them, and if any one
12370 does not fit in with the standard's definition, print an error and remove
12371 it from the list. */
12372 prev_link
= &derived
->f2k_derived
->finalizers
;
12373 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12375 gfc_formal_arglist
*dummy_args
;
12380 /* Skip this finalizer if we already resolved it. */
12381 if (list
->proc_tree
)
12383 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12384 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12385 seen_scalar
= true;
12386 prev_link
= &(list
->next
);
12390 /* Check this exists and is a SUBROUTINE. */
12391 if (!list
->proc_sym
->attr
.subroutine
)
12393 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12394 list
->proc_sym
->name
, &list
->where
);
12398 /* We should have exactly one argument. */
12399 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12400 if (!dummy_args
|| dummy_args
->next
)
12402 gfc_error ("FINAL procedure at %L must have exactly one argument",
12406 arg
= dummy_args
->sym
;
12408 /* This argument must be of our type. */
12409 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12411 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12412 &arg
->declared_at
, derived
->name
);
12416 /* It must neither be a pointer nor allocatable nor optional. */
12417 if (arg
->attr
.pointer
)
12419 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12420 &arg
->declared_at
);
12423 if (arg
->attr
.allocatable
)
12425 gfc_error ("Argument of FINAL procedure at %L must not be"
12426 " ALLOCATABLE", &arg
->declared_at
);
12429 if (arg
->attr
.optional
)
12431 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12432 &arg
->declared_at
);
12436 /* It must not be INTENT(OUT). */
12437 if (arg
->attr
.intent
== INTENT_OUT
)
12439 gfc_error ("Argument of FINAL procedure at %L must not be"
12440 " INTENT(OUT)", &arg
->declared_at
);
12444 /* Warn if the procedure is non-scalar and not assumed shape. */
12445 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12446 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12447 gfc_warning (OPT_Wsurprising
,
12448 "Non-scalar FINAL procedure at %L should have assumed"
12449 " shape argument", &arg
->declared_at
);
12451 /* Check that it does not match in kind and rank with a FINAL procedure
12452 defined earlier. To really loop over the *earlier* declarations,
12453 we need to walk the tail of the list as new ones were pushed at the
12455 /* TODO: Handle kind parameters once they are implemented. */
12456 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12457 for (i
= list
->next
; i
; i
= i
->next
)
12459 gfc_formal_arglist
*dummy_args
;
12461 /* Argument list might be empty; that is an error signalled earlier,
12462 but we nevertheless continued resolving. */
12463 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12466 gfc_symbol
* i_arg
= dummy_args
->sym
;
12467 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12468 if (i_rank
== my_rank
)
12470 gfc_error ("FINAL procedure %qs declared at %L has the same"
12471 " rank (%d) as %qs",
12472 list
->proc_sym
->name
, &list
->where
, my_rank
,
12473 i
->proc_sym
->name
);
12479 /* Is this the/a scalar finalizer procedure? */
12481 seen_scalar
= true;
12483 /* Find the symtree for this procedure. */
12484 gcc_assert (!list
->proc_tree
);
12485 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12487 prev_link
= &list
->next
;
12490 /* Remove wrong nodes immediately from the list so we don't risk any
12491 troubles in the future when they might fail later expectations. */
12494 *prev_link
= list
->next
;
12495 gfc_free_finalizer (i
);
12499 if (result
== false)
12502 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12503 were nodes in the list, must have been for arrays. It is surely a good
12504 idea to have a scalar version there if there's something to finalize. */
12505 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12506 gfc_warning (OPT_Wsurprising
,
12507 "Only array FINAL procedures declared for derived type %qs"
12508 " defined at %L, suggest also scalar one",
12509 derived
->name
, &derived
->declared_at
);
12511 vtab
= gfc_find_derived_vtab (derived
);
12512 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12513 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12516 *finalizable
= true;
12522 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12525 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12526 const char* generic_name
, locus where
)
12528 gfc_symbol
*sym1
, *sym2
;
12529 const char *pass1
, *pass2
;
12530 gfc_formal_arglist
*dummy_args
;
12532 gcc_assert (t1
->specific
&& t2
->specific
);
12533 gcc_assert (!t1
->specific
->is_generic
);
12534 gcc_assert (!t2
->specific
->is_generic
);
12535 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12537 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12538 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12543 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12544 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12545 || sym1
->attr
.function
!= sym2
->attr
.function
)
12547 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12548 " GENERIC %qs at %L",
12549 sym1
->name
, sym2
->name
, generic_name
, &where
);
12553 /* Determine PASS arguments. */
12554 if (t1
->specific
->nopass
)
12556 else if (t1
->specific
->pass_arg
)
12557 pass1
= t1
->specific
->pass_arg
;
12560 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12562 pass1
= dummy_args
->sym
->name
;
12566 if (t2
->specific
->nopass
)
12568 else if (t2
->specific
->pass_arg
)
12569 pass2
= t2
->specific
->pass_arg
;
12572 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12574 pass2
= dummy_args
->sym
->name
;
12579 /* Compare the interfaces. */
12580 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12581 NULL
, 0, pass1
, pass2
))
12583 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12584 sym1
->name
, sym2
->name
, generic_name
, &where
);
12592 /* Worker function for resolving a generic procedure binding; this is used to
12593 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12595 The difference between those cases is finding possible inherited bindings
12596 that are overridden, as one has to look for them in tb_sym_root,
12597 tb_uop_root or tb_op, respectively. Thus the caller must already find
12598 the super-type and set p->overridden correctly. */
12601 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12602 gfc_typebound_proc
* p
, const char* name
)
12604 gfc_tbp_generic
* target
;
12605 gfc_symtree
* first_target
;
12606 gfc_symtree
* inherited
;
12608 gcc_assert (p
&& p
->is_generic
);
12610 /* Try to find the specific bindings for the symtrees in our target-list. */
12611 gcc_assert (p
->u
.generic
);
12612 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12613 if (!target
->specific
)
12615 gfc_typebound_proc
* overridden_tbp
;
12616 gfc_tbp_generic
* g
;
12617 const char* target_name
;
12619 target_name
= target
->specific_st
->name
;
12621 /* Defined for this type directly. */
12622 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12624 target
->specific
= target
->specific_st
->n
.tb
;
12625 goto specific_found
;
12628 /* Look for an inherited specific binding. */
12631 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12636 gcc_assert (inherited
->n
.tb
);
12637 target
->specific
= inherited
->n
.tb
;
12638 goto specific_found
;
12642 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12643 " at %L", target_name
, name
, &p
->where
);
12646 /* Once we've found the specific binding, check it is not ambiguous with
12647 other specifics already found or inherited for the same GENERIC. */
12649 gcc_assert (target
->specific
);
12651 /* This must really be a specific binding! */
12652 if (target
->specific
->is_generic
)
12654 gfc_error ("GENERIC %qs at %L must target a specific binding,"
12655 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
12659 /* Check those already resolved on this type directly. */
12660 for (g
= p
->u
.generic
; g
; g
= g
->next
)
12661 if (g
!= target
&& g
->specific
12662 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12665 /* Check for ambiguity with inherited specific targets. */
12666 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
12667 overridden_tbp
= overridden_tbp
->overridden
)
12668 if (overridden_tbp
->is_generic
)
12670 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
12672 gcc_assert (g
->specific
);
12673 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12679 /* If we attempt to "overwrite" a specific binding, this is an error. */
12680 if (p
->overridden
&& !p
->overridden
->is_generic
)
12682 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
12683 " the same name", name
, &p
->where
);
12687 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
12688 all must have the same attributes here. */
12689 first_target
= p
->u
.generic
->specific
->u
.specific
;
12690 gcc_assert (first_target
);
12691 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
12692 p
->function
= first_target
->n
.sym
->attr
.function
;
12698 /* Resolve a GENERIC procedure binding for a derived type. */
12701 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
12703 gfc_symbol
* super_type
;
12705 /* Find the overridden binding if any. */
12706 st
->n
.tb
->overridden
= NULL
;
12707 super_type
= gfc_get_derived_super_type (derived
);
12710 gfc_symtree
* overridden
;
12711 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
12714 if (overridden
&& overridden
->n
.tb
)
12715 st
->n
.tb
->overridden
= overridden
->n
.tb
;
12718 /* Resolve using worker function. */
12719 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
12723 /* Retrieve the target-procedure of an operator binding and do some checks in
12724 common for intrinsic and user-defined type-bound operators. */
12727 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
12729 gfc_symbol
* target_proc
;
12731 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
12732 target_proc
= target
->specific
->u
.specific
->n
.sym
;
12733 gcc_assert (target_proc
);
12735 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
12736 if (target
->specific
->nopass
)
12738 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
12742 return target_proc
;
12746 /* Resolve a type-bound intrinsic operator. */
12749 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
12750 gfc_typebound_proc
* p
)
12752 gfc_symbol
* super_type
;
12753 gfc_tbp_generic
* target
;
12755 /* If there's already an error here, do nothing (but don't fail again). */
12759 /* Operators should always be GENERIC bindings. */
12760 gcc_assert (p
->is_generic
);
12762 /* Look for an overridden binding. */
12763 super_type
= gfc_get_derived_super_type (derived
);
12764 if (super_type
&& super_type
->f2k_derived
)
12765 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
12768 p
->overridden
= NULL
;
12770 /* Resolve general GENERIC properties using worker function. */
12771 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
12774 /* Check the targets to be procedures of correct interface. */
12775 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12777 gfc_symbol
* target_proc
;
12779 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
12783 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
12786 /* Add target to non-typebound operator list. */
12787 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
12788 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
12790 gfc_interface
*head
, *intr
;
12792 /* Preempt 'gfc_check_new_interface' for submodules, where the
12793 mechanism for handling module procedures winds up resolving
12794 operator interfaces twice and would otherwise cause an error. */
12795 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
12796 if (intr
->sym
== target_proc
12797 && target_proc
->attr
.used_in_submodule
)
12800 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
12801 target_proc
, p
->where
))
12803 head
= derived
->ns
->op
[op
];
12804 intr
= gfc_get_interface ();
12805 intr
->sym
= target_proc
;
12806 intr
->where
= p
->where
;
12808 derived
->ns
->op
[op
] = intr
;
12820 /* Resolve a type-bound user operator (tree-walker callback). */
12822 static gfc_symbol
* resolve_bindings_derived
;
12823 static bool resolve_bindings_result
;
12825 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
12828 resolve_typebound_user_op (gfc_symtree
* stree
)
12830 gfc_symbol
* super_type
;
12831 gfc_tbp_generic
* target
;
12833 gcc_assert (stree
&& stree
->n
.tb
);
12835 if (stree
->n
.tb
->error
)
12838 /* Operators should always be GENERIC bindings. */
12839 gcc_assert (stree
->n
.tb
->is_generic
);
12841 /* Find overridden procedure, if any. */
12842 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
12843 if (super_type
&& super_type
->f2k_derived
)
12845 gfc_symtree
* overridden
;
12846 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
12847 stree
->name
, true, NULL
);
12849 if (overridden
&& overridden
->n
.tb
)
12850 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
12853 stree
->n
.tb
->overridden
= NULL
;
12855 /* Resolve basically using worker function. */
12856 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
12859 /* Check the targets to be functions of correct interface. */
12860 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
12862 gfc_symbol
* target_proc
;
12864 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
12868 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
12875 resolve_bindings_result
= false;
12876 stree
->n
.tb
->error
= 1;
12880 /* Resolve the type-bound procedures for a derived type. */
12883 resolve_typebound_procedure (gfc_symtree
* stree
)
12887 gfc_symbol
* me_arg
;
12888 gfc_symbol
* super_type
;
12889 gfc_component
* comp
;
12891 gcc_assert (stree
);
12893 /* Undefined specific symbol from GENERIC target definition. */
12897 if (stree
->n
.tb
->error
)
12900 /* If this is a GENERIC binding, use that routine. */
12901 if (stree
->n
.tb
->is_generic
)
12903 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
12908 /* Get the target-procedure to check it. */
12909 gcc_assert (!stree
->n
.tb
->is_generic
);
12910 gcc_assert (stree
->n
.tb
->u
.specific
);
12911 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
12912 where
= stree
->n
.tb
->where
;
12914 /* Default access should already be resolved from the parser. */
12915 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
12917 if (stree
->n
.tb
->deferred
)
12919 if (!check_proc_interface (proc
, &where
))
12924 /* Check for F08:C465. */
12925 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
12926 || (proc
->attr
.proc
!= PROC_MODULE
12927 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
12928 || proc
->attr
.abstract
)
12930 gfc_error ("%qs must be a module procedure or an external procedure with"
12931 " an explicit interface at %L", proc
->name
, &where
);
12936 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
12937 stree
->n
.tb
->function
= proc
->attr
.function
;
12939 /* Find the super-type of the current derived type. We could do this once and
12940 store in a global if speed is needed, but as long as not I believe this is
12941 more readable and clearer. */
12942 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
12944 /* If PASS, resolve and check arguments if not already resolved / loaded
12945 from a .mod file. */
12946 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
12948 gfc_formal_arglist
*dummy_args
;
12950 dummy_args
= gfc_sym_get_dummy_args (proc
);
12951 if (stree
->n
.tb
->pass_arg
)
12953 gfc_formal_arglist
*i
;
12955 /* If an explicit passing argument name is given, walk the arg-list
12956 and look for it. */
12959 stree
->n
.tb
->pass_arg_num
= 1;
12960 for (i
= dummy_args
; i
; i
= i
->next
)
12962 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
12967 ++stree
->n
.tb
->pass_arg_num
;
12972 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
12974 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
12975 stree
->n
.tb
->pass_arg
);
12981 /* Otherwise, take the first one; there should in fact be at least
12983 stree
->n
.tb
->pass_arg_num
= 1;
12986 gfc_error ("Procedure %qs with PASS at %L must have at"
12987 " least one argument", proc
->name
, &where
);
12990 me_arg
= dummy_args
->sym
;
12993 /* Now check that the argument-type matches and the passed-object
12994 dummy argument is generally fine. */
12996 gcc_assert (me_arg
);
12998 if (me_arg
->ts
.type
!= BT_CLASS
)
13000 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13001 " at %L", proc
->name
, &where
);
13005 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13006 != resolve_bindings_derived
)
13008 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13009 " the derived-type %qs", me_arg
->name
, proc
->name
,
13010 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13014 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13015 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13017 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13018 " scalar", proc
->name
, &where
);
13021 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13023 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13024 " be ALLOCATABLE", proc
->name
, &where
);
13027 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13029 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13030 " be POINTER", proc
->name
, &where
);
13035 /* If we are extending some type, check that we don't override a procedure
13036 flagged NON_OVERRIDABLE. */
13037 stree
->n
.tb
->overridden
= NULL
;
13040 gfc_symtree
* overridden
;
13041 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13042 stree
->name
, true, NULL
);
13046 if (overridden
->n
.tb
)
13047 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13049 if (!gfc_check_typebound_override (stree
, overridden
))
13054 /* See if there's a name collision with a component directly in this type. */
13055 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13056 if (!strcmp (comp
->name
, stree
->name
))
13058 gfc_error ("Procedure %qs at %L has the same name as a component of"
13060 stree
->name
, &where
, resolve_bindings_derived
->name
);
13064 /* Try to find a name collision with an inherited component. */
13065 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13068 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13069 " component of %qs",
13070 stree
->name
, &where
, resolve_bindings_derived
->name
);
13074 stree
->n
.tb
->error
= 0;
13078 resolve_bindings_result
= false;
13079 stree
->n
.tb
->error
= 1;
13084 resolve_typebound_procedures (gfc_symbol
* derived
)
13087 gfc_symbol
* super_type
;
13089 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13092 super_type
= gfc_get_derived_super_type (derived
);
13094 resolve_symbol (super_type
);
13096 resolve_bindings_derived
= derived
;
13097 resolve_bindings_result
= true;
13099 if (derived
->f2k_derived
->tb_sym_root
)
13100 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13101 &resolve_typebound_procedure
);
13103 if (derived
->f2k_derived
->tb_uop_root
)
13104 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13105 &resolve_typebound_user_op
);
13107 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13109 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13110 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13111 (gfc_intrinsic_op
)op
, p
))
13112 resolve_bindings_result
= false;
13115 return resolve_bindings_result
;
13119 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13120 to give all identical derived types the same backend_decl. */
13122 add_dt_to_dt_list (gfc_symbol
*derived
)
13124 gfc_dt_list
*dt_list
;
13126 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13127 if (derived
== dt_list
->derived
)
13130 dt_list
= gfc_get_dt_list ();
13131 dt_list
->next
= gfc_derived_types
;
13132 dt_list
->derived
= derived
;
13133 gfc_derived_types
= dt_list
;
13137 /* Ensure that a derived-type is really not abstract, meaning that every
13138 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13141 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13146 if (!ensure_not_abstract_walker (sub
, st
->left
))
13148 if (!ensure_not_abstract_walker (sub
, st
->right
))
13151 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13153 gfc_symtree
* overriding
;
13154 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13157 gcc_assert (overriding
->n
.tb
);
13158 if (overriding
->n
.tb
->deferred
)
13160 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13161 " %qs is DEFERRED and not overridden",
13162 sub
->name
, &sub
->declared_at
, st
->name
);
13171 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13173 /* The algorithm used here is to recursively travel up the ancestry of sub
13174 and for each ancestor-type, check all bindings. If any of them is
13175 DEFERRED, look it up starting from sub and see if the found (overriding)
13176 binding is not DEFERRED.
13177 This is not the most efficient way to do this, but it should be ok and is
13178 clearer than something sophisticated. */
13180 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13182 if (!ancestor
->attr
.abstract
)
13185 /* Walk bindings of this ancestor. */
13186 if (ancestor
->f2k_derived
)
13189 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13194 /* Find next ancestor type and recurse on it. */
13195 ancestor
= gfc_get_derived_super_type (ancestor
);
13197 return ensure_not_abstract (sub
, ancestor
);
13203 /* This check for typebound defined assignments is done recursively
13204 since the order in which derived types are resolved is not always in
13205 order of the declarations. */
13208 check_defined_assignments (gfc_symbol
*derived
)
13212 for (c
= derived
->components
; c
; c
= c
->next
)
13214 if (!gfc_bt_struct (c
->ts
.type
)
13216 || c
->attr
.allocatable
13217 || c
->attr
.proc_pointer_comp
13218 || c
->attr
.class_pointer
13219 || c
->attr
.proc_pointer
)
13222 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13223 || (c
->ts
.u
.derived
->f2k_derived
13224 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13226 derived
->attr
.defined_assign_comp
= 1;
13230 check_defined_assignments (c
->ts
.u
.derived
);
13231 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13233 derived
->attr
.defined_assign_comp
= 1;
13240 /* Resolve a single component of a derived type or structure. */
13243 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13245 gfc_symbol
*super_type
;
13247 if (c
->attr
.artificial
)
13251 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13252 && c
->attr
.codimension
13253 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13255 gfc_error ("Coarray component %qs at %L must be allocatable with "
13256 "deferred shape", c
->name
, &c
->loc
);
13261 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13262 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13264 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13265 "shall not be a coarray", c
->name
, &c
->loc
);
13270 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13271 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13272 || c
->attr
.allocatable
))
13274 gfc_error ("Component %qs at %L with coarray component "
13275 "shall be a nonpointer, nonallocatable scalar",
13281 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13283 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13284 "is not an array pointer", c
->name
, &c
->loc
);
13288 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13290 gfc_symbol
*ifc
= c
->ts
.interface
;
13292 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13298 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13300 /* Resolve interface and copy attributes. */
13301 if (ifc
->formal
&& !ifc
->formal_ns
)
13302 resolve_symbol (ifc
);
13303 if (ifc
->attr
.intrinsic
)
13304 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13308 c
->ts
= ifc
->result
->ts
;
13309 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13310 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13311 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13312 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13313 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13318 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13319 c
->attr
.pointer
= ifc
->attr
.pointer
;
13320 c
->attr
.dimension
= ifc
->attr
.dimension
;
13321 c
->as
= gfc_copy_array_spec (ifc
->as
);
13322 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13324 c
->ts
.interface
= ifc
;
13325 c
->attr
.function
= ifc
->attr
.function
;
13326 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13328 c
->attr
.pure
= ifc
->attr
.pure
;
13329 c
->attr
.elemental
= ifc
->attr
.elemental
;
13330 c
->attr
.recursive
= ifc
->attr
.recursive
;
13331 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13332 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13333 /* Copy char length. */
13334 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13336 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13337 if (cl
->length
&& !cl
->resolved
13338 && !gfc_resolve_expr (cl
->length
))
13347 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13349 /* Since PPCs are not implicitly typed, a PPC without an explicit
13350 interface must be a subroutine. */
13351 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13354 /* Procedure pointer components: Check PASS arg. */
13355 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13356 && !sym
->attr
.vtype
)
13358 gfc_symbol
* me_arg
;
13360 if (c
->tb
->pass_arg
)
13362 gfc_formal_arglist
* i
;
13364 /* If an explicit passing argument name is given, walk the arg-list
13365 and look for it. */
13368 c
->tb
->pass_arg_num
= 1;
13369 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13371 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13376 c
->tb
->pass_arg_num
++;
13381 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13382 "at %L has no argument %qs", c
->name
,
13383 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13390 /* Otherwise, take the first one; there should in fact be at least
13392 c
->tb
->pass_arg_num
= 1;
13393 if (!c
->ts
.interface
->formal
)
13395 gfc_error ("Procedure pointer component %qs with PASS at %L "
13396 "must have at least one argument",
13401 me_arg
= c
->ts
.interface
->formal
->sym
;
13404 /* Now check that the argument-type matches. */
13405 gcc_assert (me_arg
);
13406 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13407 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13408 || (me_arg
->ts
.type
== BT_CLASS
13409 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13411 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13412 " the derived type %qs", me_arg
->name
, c
->name
,
13413 me_arg
->name
, &c
->loc
, sym
->name
);
13418 /* Check for C453. */
13419 if (me_arg
->attr
.dimension
)
13421 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13422 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13428 if (me_arg
->attr
.pointer
)
13430 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13431 "may not have the POINTER attribute", me_arg
->name
,
13432 c
->name
, me_arg
->name
, &c
->loc
);
13437 if (me_arg
->attr
.allocatable
)
13439 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13440 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13441 me_arg
->name
, &c
->loc
);
13446 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13448 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13449 " at %L", c
->name
, &c
->loc
);
13455 /* Check type-spec if this is not the parent-type component. */
13456 if (((sym
->attr
.is_class
13457 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13458 || c
!= sym
->components
->ts
.u
.derived
->components
))
13459 || (!sym
->attr
.is_class
13460 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13461 && !sym
->attr
.vtype
13462 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13465 super_type
= gfc_get_derived_super_type (sym
);
13467 /* If this type is an extension, set the accessibility of the parent
13470 && ((sym
->attr
.is_class
13471 && c
== sym
->components
->ts
.u
.derived
->components
)
13472 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13473 && strcmp (super_type
->name
, c
->name
) == 0)
13474 c
->attr
.access
= super_type
->attr
.access
;
13476 /* If this type is an extension, see if this component has the same name
13477 as an inherited type-bound procedure. */
13478 if (super_type
&& !sym
->attr
.is_class
13479 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13481 gfc_error ("Component %qs of %qs at %L has the same name as an"
13482 " inherited type-bound procedure",
13483 c
->name
, sym
->name
, &c
->loc
);
13487 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13488 && !c
->ts
.deferred
)
13490 if (c
->ts
.u
.cl
->length
== NULL
13491 || (!resolve_charlen(c
->ts
.u
.cl
))
13492 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13494 gfc_error ("Character length of component %qs needs to "
13495 "be a constant specification expression at %L",
13497 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13502 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13503 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13505 gfc_error ("Character component %qs of %qs at %L with deferred "
13506 "length must be a POINTER or ALLOCATABLE",
13507 c
->name
, sym
->name
, &c
->loc
);
13511 /* Add the hidden deferred length field. */
13512 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
&& !c
->attr
.function
13513 && !sym
->attr
.is_class
)
13515 char name
[GFC_MAX_SYMBOL_LEN
+9];
13516 gfc_component
*strlen
;
13517 sprintf (name
, "_%s_length", c
->name
);
13518 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13519 if (strlen
== NULL
)
13521 if (!gfc_add_component (sym
, name
, &strlen
))
13523 strlen
->ts
.type
= BT_INTEGER
;
13524 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13525 strlen
->attr
.access
= ACCESS_PRIVATE
;
13526 strlen
->attr
.artificial
= 1;
13530 if (c
->ts
.type
== BT_DERIVED
13531 && sym
->component_access
!= ACCESS_PRIVATE
13532 && gfc_check_symbol_access (sym
)
13533 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13534 && !c
->ts
.u
.derived
->attr
.use_assoc
13535 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13536 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13537 "PRIVATE type and cannot be a component of "
13538 "%qs, which is PUBLIC at %L", c
->name
,
13539 sym
->name
, &sym
->declared_at
))
13542 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13544 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13545 "type %s", c
->name
, &c
->loc
, sym
->name
);
13549 if (sym
->attr
.sequence
)
13551 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13553 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13554 "not have the SEQUENCE attribute",
13555 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13560 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13561 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13562 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13563 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13564 CLASS_DATA (c
)->ts
.u
.derived
13565 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13567 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13568 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13569 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13571 gfc_error ("The pointer component %qs of %qs at %L is a type "
13572 "that has not been declared", c
->name
, sym
->name
,
13577 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13578 && CLASS_DATA (c
)->attr
.class_pointer
13579 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13580 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13581 && !UNLIMITED_POLY (c
))
13583 gfc_error ("The pointer component %qs of %qs at %L is a type "
13584 "that has not been declared", c
->name
, sym
->name
,
13589 /* If an allocatable component derived type is of the same type as
13590 the enclosing derived type, we need a vtable generating so that
13591 the __deallocate procedure is created. */
13592 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13593 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13594 gfc_find_vtab (&c
->ts
);
13596 /* Ensure that all the derived type components are put on the
13597 derived type list; even in formal namespaces, where derived type
13598 pointer components might not have been declared. */
13599 if (c
->ts
.type
== BT_DERIVED
13601 && c
->ts
.u
.derived
->components
13603 && sym
!= c
->ts
.u
.derived
)
13604 add_dt_to_dt_list (c
->ts
.u
.derived
);
13606 if (!gfc_resolve_array_spec (c
->as
,
13607 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13608 || c
->attr
.allocatable
)))
13611 if (c
->initializer
&& !sym
->attr
.vtype
13612 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13619 /* Be nice about the locus for a structure expression - show the locus of the
13620 first non-null sub-expression if we can. */
13623 cons_where (gfc_expr
*struct_expr
)
13625 gfc_constructor
*cons
;
13627 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13629 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13630 for (; cons
; cons
= gfc_constructor_next (cons
))
13632 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13633 return &cons
->expr
->where
;
13636 return &struct_expr
->where
;
13639 /* Resolve the components of a structure type. Much less work than derived
13643 resolve_fl_struct (gfc_symbol
*sym
)
13646 gfc_expr
*init
= NULL
;
13649 /* Make sure UNIONs do not have overlapping initializers. */
13650 if (sym
->attr
.flavor
== FL_UNION
)
13652 for (c
= sym
->components
; c
; c
= c
->next
)
13654 if (init
&& c
->initializer
)
13656 gfc_error ("Conflicting initializers in union at %L and %L",
13657 cons_where (init
), cons_where (c
->initializer
));
13658 gfc_free_expr (c
->initializer
);
13659 c
->initializer
= NULL
;
13662 init
= c
->initializer
;
13667 for (c
= sym
->components
; c
; c
= c
->next
)
13668 if (!resolve_component (c
, sym
))
13674 if (sym
->components
)
13675 add_dt_to_dt_list (sym
);
13681 /* Resolve the components of a derived type. This does not have to wait until
13682 resolution stage, but can be done as soon as the dt declaration has been
13686 resolve_fl_derived0 (gfc_symbol
*sym
)
13688 gfc_symbol
* super_type
;
13692 if (sym
->attr
.unlimited_polymorphic
)
13695 super_type
= gfc_get_derived_super_type (sym
);
13698 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
13700 gfc_error ("As extending type %qs at %L has a coarray component, "
13701 "parent type %qs shall also have one", sym
->name
,
13702 &sym
->declared_at
, super_type
->name
);
13706 /* Ensure the extended type gets resolved before we do. */
13707 if (super_type
&& !resolve_fl_derived0 (super_type
))
13710 /* An ABSTRACT type must be extensible. */
13711 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
13713 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
13714 sym
->name
, &sym
->declared_at
);
13718 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
13722 for ( ; c
!= NULL
; c
= c
->next
)
13723 if (!resolve_component (c
, sym
))
13729 check_defined_assignments (sym
);
13731 if (!sym
->attr
.defined_assign_comp
&& super_type
)
13732 sym
->attr
.defined_assign_comp
13733 = super_type
->attr
.defined_assign_comp
;
13735 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
13736 all DEFERRED bindings are overridden. */
13737 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
13738 && !sym
->attr
.is_class
13739 && !ensure_not_abstract (sym
, super_type
))
13742 /* Add derived type to the derived type list. */
13743 add_dt_to_dt_list (sym
);
13749 /* The following procedure does the full resolution of a derived type,
13750 including resolution of all type-bound procedures (if present). In contrast
13751 to 'resolve_fl_derived0' this can only be done after the module has been
13752 parsed completely. */
13755 resolve_fl_derived (gfc_symbol
*sym
)
13757 gfc_symbol
*gen_dt
= NULL
;
13759 if (sym
->attr
.unlimited_polymorphic
)
13762 if (!sym
->attr
.is_class
)
13763 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
13764 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
13765 && (!gen_dt
->generic
->sym
->attr
.use_assoc
13766 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
13767 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
13768 "%qs at %L being the same name as derived "
13769 "type at %L", sym
->name
,
13770 gen_dt
->generic
->sym
== sym
13771 ? gen_dt
->generic
->next
->sym
->name
13772 : gen_dt
->generic
->sym
->name
,
13773 gen_dt
->generic
->sym
== sym
13774 ? &gen_dt
->generic
->next
->sym
->declared_at
13775 : &gen_dt
->generic
->sym
->declared_at
,
13776 &sym
->declared_at
))
13779 /* Resolve the finalizer procedures. */
13780 if (!gfc_resolve_finalizers (sym
, NULL
))
13783 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
13785 /* Fix up incomplete CLASS symbols. */
13786 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
13787 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
13789 /* Nothing more to do for unlimited polymorphic entities. */
13790 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
13792 else if (vptr
->ts
.u
.derived
== NULL
)
13794 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
13796 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
13800 if (!resolve_fl_derived0 (sym
))
13803 /* Resolve the type-bound procedures. */
13804 if (!resolve_typebound_procedures (sym
))
13811 /* Check for formatted read and write DTIO procedures. */
13814 dtio_procs_present (gfc_symbol
*sym
)
13816 gfc_symbol
*derived
;
13818 if (sym
->ts
.type
== BT_CLASS
)
13819 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
13820 else if (sym
->ts
.type
== BT_DERIVED
)
13821 derived
= sym
->ts
.u
.derived
;
13825 return gfc_find_specific_dtio_proc (derived
, true, true) != NULL
13826 && gfc_find_specific_dtio_proc (derived
, false, true) != NULL
;
13831 resolve_fl_namelist (gfc_symbol
*sym
)
13837 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
13839 /* Check again, the check in match only works if NAMELIST comes
13841 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
13843 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
13844 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13848 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
13849 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
13850 "with assumed shape in namelist %qs at %L",
13851 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
13854 if (is_non_constant_shape_array (nl
->sym
)
13855 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
13856 "with nonconstant shape in namelist %qs at %L",
13857 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
13860 if (nl
->sym
->ts
.type
== BT_CHARACTER
13861 && (nl
->sym
->ts
.u
.cl
->length
== NULL
13862 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
13863 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
13864 "nonconstant character length in "
13865 "namelist %qs at %L", nl
->sym
->name
,
13866 sym
->name
, &sym
->declared_at
))
13869 dtio
= dtio_procs_present (nl
->sym
);
13871 if (nl
->sym
->ts
.type
== BT_CLASS
&& !dtio
)
13873 gfc_error ("NAMELIST object %qs in namelist %qs at %L is "
13874 "polymorphic and requires a defined input/output "
13875 "procedure", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13879 if (nl
->sym
->ts
.type
== BT_DERIVED
13880 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
13881 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
13883 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
13884 "namelist %qs at %L with ALLOCATABLE "
13885 "or POINTER components", nl
->sym
->name
,
13886 sym
->name
, &sym
->declared_at
))
13892 /* Reject PRIVATE objects in a PUBLIC namelist. */
13893 if (gfc_check_symbol_access (sym
))
13895 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
13897 if (!nl
->sym
->attr
.use_assoc
13898 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
13899 && !gfc_check_symbol_access (nl
->sym
))
13901 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
13902 "cannot be member of PUBLIC namelist %qs at %L",
13903 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13907 /* If the derived type has specific DTIO procedures for both read and
13908 write then namelist objects with private components are OK. */
13909 if (dtio_procs_present (nl
->sym
))
13912 /* Types with private components that came here by USE-association. */
13913 if (nl
->sym
->ts
.type
== BT_DERIVED
13914 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
13916 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
13917 "components and cannot be member of namelist %qs at %L",
13918 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13922 /* Types with private components that are defined in the same module. */
13923 if (nl
->sym
->ts
.type
== BT_DERIVED
13924 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
13925 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
13927 gfc_error ("NAMELIST object %qs has PRIVATE components and "
13928 "cannot be a member of PUBLIC namelist %qs at %L",
13929 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13936 /* 14.1.2 A module or internal procedure represent local entities
13937 of the same type as a namelist member and so are not allowed. */
13938 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
13940 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
13943 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
13944 if ((nl
->sym
== sym
->ns
->proc_name
)
13946 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
13951 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
13952 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
13954 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
13955 "attribute in %qs at %L", nlsym
->name
,
13956 &sym
->declared_at
);
13966 resolve_fl_parameter (gfc_symbol
*sym
)
13968 /* A parameter array's shape needs to be constant. */
13969 if (sym
->as
!= NULL
13970 && (sym
->as
->type
== AS_DEFERRED
13971 || is_non_constant_shape_array (sym
)))
13973 gfc_error ("Parameter array %qs at %L cannot be automatic "
13974 "or of deferred shape", sym
->name
, &sym
->declared_at
);
13978 /* Constraints on deferred type parameter. */
13979 if (!deferred_requirements (sym
))
13982 /* Make sure a parameter that has been implicitly typed still
13983 matches the implicit type, since PARAMETER statements can precede
13984 IMPLICIT statements. */
13985 if (sym
->attr
.implicit_type
13986 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
13989 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
13990 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
13994 /* Make sure the types of derived parameters are consistent. This
13995 type checking is deferred until resolution because the type may
13996 refer to a derived type from the host. */
13997 if (sym
->ts
.type
== BT_DERIVED
13998 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14000 gfc_error ("Incompatible derived type in PARAMETER at %L",
14001 &sym
->value
->where
);
14005 /* F03:C509,C514. */
14006 if (sym
->ts
.type
== BT_CLASS
)
14008 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14009 sym
->name
, &sym
->declared_at
);
14017 /* Do anything necessary to resolve a symbol. Right now, we just
14018 assume that an otherwise unknown symbol is a variable. This sort
14019 of thing commonly happens for symbols in module. */
14022 resolve_symbol (gfc_symbol
*sym
)
14024 int check_constant
, mp_flag
;
14025 gfc_symtree
*symtree
;
14026 gfc_symtree
*this_symtree
;
14029 symbol_attribute class_attr
;
14030 gfc_array_spec
*as
;
14031 bool saved_specification_expr
;
14037 /* No symbol will ever have union type; only components can be unions.
14038 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14039 (just like derived type declaration symbols have flavor FL_DERIVED). */
14040 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14042 /* Coarrayed polymorphic objects with allocatable or pointer components are
14043 yet unsupported for -fcoarray=lib. */
14044 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14045 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14046 && CLASS_DATA (sym
)->attr
.codimension
14047 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14048 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14050 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14051 "type coarrays at %L are unsupported", &sym
->declared_at
);
14055 if (sym
->attr
.artificial
)
14058 if (sym
->attr
.unlimited_polymorphic
)
14061 if (sym
->attr
.flavor
== FL_UNKNOWN
14062 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14063 && !sym
->attr
.generic
&& !sym
->attr
.external
14064 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14065 && sym
->ts
.type
== BT_UNKNOWN
))
14068 /* If we find that a flavorless symbol is an interface in one of the
14069 parent namespaces, find its symtree in this namespace, free the
14070 symbol and set the symtree to point to the interface symbol. */
14071 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14073 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14074 if (symtree
&& (symtree
->n
.sym
->generic
||
14075 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14076 && sym
->ns
->construct_entities
)))
14078 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14080 if (this_symtree
->n
.sym
== sym
)
14082 symtree
->n
.sym
->refs
++;
14083 gfc_release_symbol (sym
);
14084 this_symtree
->n
.sym
= symtree
->n
.sym
;
14090 /* Otherwise give it a flavor according to such attributes as
14092 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14093 && sym
->attr
.intrinsic
== 0)
14094 sym
->attr
.flavor
= FL_VARIABLE
;
14095 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14097 sym
->attr
.flavor
= FL_PROCEDURE
;
14098 if (sym
->attr
.dimension
)
14099 sym
->attr
.function
= 1;
14103 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14104 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14106 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14107 && !resolve_procedure_interface (sym
))
14110 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14111 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14113 if (sym
->attr
.external
)
14114 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14115 "at %L", &sym
->declared_at
);
14117 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14118 "at %L", &sym
->declared_at
);
14123 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14126 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14127 && !resolve_fl_struct (sym
))
14130 /* Symbols that are module procedures with results (functions) have
14131 the types and array specification copied for type checking in
14132 procedures that call them, as well as for saving to a module
14133 file. These symbols can't stand the scrutiny that their results
14135 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14137 /* Make sure that the intrinsic is consistent with its internal
14138 representation. This needs to be done before assigning a default
14139 type to avoid spurious warnings. */
14140 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14141 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14144 /* Resolve associate names. */
14146 resolve_assoc_var (sym
, true);
14148 /* Assign default type to symbols that need one and don't have one. */
14149 if (sym
->ts
.type
== BT_UNKNOWN
)
14151 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14153 gfc_set_default_type (sym
, 1, NULL
);
14156 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14157 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14158 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14159 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14161 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14163 /* The specific case of an external procedure should emit an error
14164 in the case that there is no implicit type. */
14167 if (!sym
->attr
.mixed_entry_master
)
14168 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14172 /* Result may be in another namespace. */
14173 resolve_symbol (sym
->result
);
14175 if (!sym
->result
->attr
.proc_pointer
)
14177 sym
->ts
= sym
->result
->ts
;
14178 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14179 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14180 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14181 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14182 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14187 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14189 bool saved_specification_expr
= specification_expr
;
14190 specification_expr
= true;
14191 gfc_resolve_array_spec (sym
->result
->as
, false);
14192 specification_expr
= saved_specification_expr
;
14195 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14197 as
= CLASS_DATA (sym
)->as
;
14198 class_attr
= CLASS_DATA (sym
)->attr
;
14199 class_attr
.pointer
= class_attr
.class_pointer
;
14203 class_attr
= sym
->attr
;
14208 if (sym
->attr
.contiguous
14209 && (!class_attr
.dimension
14210 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14211 && !class_attr
.pointer
)))
14213 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14214 "array pointer or an assumed-shape or assumed-rank array",
14215 sym
->name
, &sym
->declared_at
);
14219 /* Assumed size arrays and assumed shape arrays must be dummy
14220 arguments. Array-spec's of implied-shape should have been resolved to
14221 AS_EXPLICIT already. */
14225 gcc_assert (as
->type
!= AS_IMPLIED_SHAPE
);
14226 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14227 || as
->type
== AS_ASSUMED_SHAPE
)
14228 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14230 if (as
->type
== AS_ASSUMED_SIZE
)
14231 gfc_error ("Assumed size array at %L must be a dummy argument",
14232 &sym
->declared_at
);
14234 gfc_error ("Assumed shape array at %L must be a dummy argument",
14235 &sym
->declared_at
);
14238 /* TS 29113, C535a. */
14239 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14240 && !sym
->attr
.select_type_temporary
)
14242 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14243 &sym
->declared_at
);
14246 if (as
->type
== AS_ASSUMED_RANK
14247 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14249 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14250 "CODIMENSION attribute", &sym
->declared_at
);
14255 /* Make sure symbols with known intent or optional are really dummy
14256 variable. Because of ENTRY statement, this has to be deferred
14257 until resolution time. */
14259 if (!sym
->attr
.dummy
14260 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14262 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14266 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14268 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14269 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14273 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14275 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14276 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14278 gfc_error ("Character dummy variable %qs at %L with VALUE "
14279 "attribute must have constant length",
14280 sym
->name
, &sym
->declared_at
);
14284 if (sym
->ts
.is_c_interop
14285 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14287 gfc_error ("C interoperable character dummy variable %qs at %L "
14288 "with VALUE attribute must have length one",
14289 sym
->name
, &sym
->declared_at
);
14294 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14295 && sym
->ts
.u
.derived
->attr
.generic
)
14297 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14298 if (!sym
->ts
.u
.derived
)
14300 gfc_error ("The derived type %qs at %L is of type %qs, "
14301 "which has not been defined", sym
->name
,
14302 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14303 sym
->ts
.type
= BT_UNKNOWN
;
14308 /* Use the same constraints as TYPE(*), except for the type check
14309 and that only scalars and assumed-size arrays are permitted. */
14310 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14312 if (!sym
->attr
.dummy
)
14314 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14315 "a dummy argument", sym
->name
, &sym
->declared_at
);
14319 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14320 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14321 && sym
->ts
.type
!= BT_COMPLEX
)
14323 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14324 "of type TYPE(*) or of an numeric intrinsic type",
14325 sym
->name
, &sym
->declared_at
);
14329 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14330 || sym
->attr
.pointer
|| sym
->attr
.value
)
14332 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14333 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14334 "attribute", sym
->name
, &sym
->declared_at
);
14338 if (sym
->attr
.intent
== INTENT_OUT
)
14340 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14341 "have the INTENT(OUT) attribute",
14342 sym
->name
, &sym
->declared_at
);
14345 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14347 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14348 "either be a scalar or an assumed-size array",
14349 sym
->name
, &sym
->declared_at
);
14353 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14354 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14356 sym
->ts
.type
= BT_ASSUMED
;
14357 sym
->as
= gfc_get_array_spec ();
14358 sym
->as
->type
= AS_ASSUMED_SIZE
;
14360 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14362 else if (sym
->ts
.type
== BT_ASSUMED
)
14364 /* TS 29113, C407a. */
14365 if (!sym
->attr
.dummy
)
14367 gfc_error ("Assumed type of variable %s at %L is only permitted "
14368 "for dummy variables", sym
->name
, &sym
->declared_at
);
14371 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14372 || sym
->attr
.pointer
|| sym
->attr
.value
)
14374 gfc_error ("Assumed-type variable %s at %L may not have the "
14375 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14376 sym
->name
, &sym
->declared_at
);
14379 if (sym
->attr
.intent
== INTENT_OUT
)
14381 gfc_error ("Assumed-type variable %s at %L may not have the "
14382 "INTENT(OUT) attribute",
14383 sym
->name
, &sym
->declared_at
);
14386 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14388 gfc_error ("Assumed-type variable %s at %L shall not be an "
14389 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14394 /* If the symbol is marked as bind(c), verify it's type and kind. Do not
14395 do this for something that was implicitly typed because that is handled
14396 in gfc_set_default_type. Handle dummy arguments and procedure
14397 definitions separately. Also, anything that is use associated is not
14398 handled here but instead is handled in the module it is declared in.
14399 Finally, derived type definitions are allowed to be BIND(C) since that
14400 only implies that they're interoperable, and they are checked fully for
14401 interoperability when a variable is declared of that type. */
14402 if (sym
->attr
.is_bind_c
&& sym
->attr
.implicit_type
== 0 &&
14403 sym
->attr
.use_assoc
== 0 && sym
->attr
.dummy
== 0 &&
14404 sym
->attr
.flavor
!= FL_PROCEDURE
&& sym
->attr
.flavor
!= FL_DERIVED
)
14408 /* First, make sure the variable is declared at the
14409 module-level scope (J3/04-007, Section 15.3). */
14410 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14411 sym
->attr
.in_common
== 0)
14413 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14414 "is neither a COMMON block nor declared at the "
14415 "module level scope", sym
->name
, &(sym
->declared_at
));
14418 else if (sym
->common_head
!= NULL
)
14420 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14424 /* If type() declaration, we need to verify that the components
14425 of the given type are all C interoperable, etc. */
14426 if (sym
->ts
.type
== BT_DERIVED
&&
14427 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14429 /* Make sure the user marked the derived type as BIND(C). If
14430 not, call the verify routine. This could print an error
14431 for the derived type more than once if multiple variables
14432 of that type are declared. */
14433 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14434 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14438 /* Verify the variable itself as C interoperable if it
14439 is BIND(C). It is not possible for this to succeed if
14440 the verify_bind_c_derived_type failed, so don't have to handle
14441 any error returned by verify_bind_c_derived_type. */
14442 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14443 sym
->common_block
);
14448 /* clear the is_bind_c flag to prevent reporting errors more than
14449 once if something failed. */
14450 sym
->attr
.is_bind_c
= 0;
14455 /* If a derived type symbol has reached this point, without its
14456 type being declared, we have an error. Notice that most
14457 conditions that produce undefined derived types have already
14458 been dealt with. However, the likes of:
14459 implicit type(t) (t) ..... call foo (t) will get us here if
14460 the type is not declared in the scope of the implicit
14461 statement. Change the type to BT_UNKNOWN, both because it is so
14462 and to prevent an ICE. */
14463 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14464 && sym
->ts
.u
.derived
->components
== NULL
14465 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14467 gfc_error ("The derived type %qs at %L is of type %qs, "
14468 "which has not been defined", sym
->name
,
14469 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14470 sym
->ts
.type
= BT_UNKNOWN
;
14474 /* Make sure that the derived type has been resolved and that the
14475 derived type is visible in the symbol's namespace, if it is a
14476 module function and is not PRIVATE. */
14477 if (sym
->ts
.type
== BT_DERIVED
14478 && sym
->ts
.u
.derived
->attr
.use_assoc
14479 && sym
->ns
->proc_name
14480 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14481 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14484 /* Unless the derived-type declaration is use associated, Fortran 95
14485 does not allow public entries of private derived types.
14486 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14487 161 in 95-006r3. */
14488 if (sym
->ts
.type
== BT_DERIVED
14489 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14490 && !sym
->ts
.u
.derived
->attr
.use_assoc
14491 && gfc_check_symbol_access (sym
)
14492 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14493 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14494 "derived type %qs",
14495 (sym
->attr
.flavor
== FL_PARAMETER
)
14496 ? "parameter" : "variable",
14497 sym
->name
, &sym
->declared_at
,
14498 sym
->ts
.u
.derived
->name
))
14501 /* F2008, C1302. */
14502 if (sym
->ts
.type
== BT_DERIVED
14503 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14504 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14505 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14506 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14508 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14509 "type LOCK_TYPE must be a coarray", sym
->name
,
14510 &sym
->declared_at
);
14514 /* TS18508, C702/C703. */
14515 if (sym
->ts
.type
== BT_DERIVED
14516 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14517 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14518 || sym
->ts
.u
.derived
->attr
.event_comp
)
14519 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14521 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14522 "type LOCK_TYPE must be a coarray", sym
->name
,
14523 &sym
->declared_at
);
14527 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14528 default initialization is defined (5.1.2.4.4). */
14529 if (sym
->ts
.type
== BT_DERIVED
14531 && sym
->attr
.intent
== INTENT_OUT
14533 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14535 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14537 if (c
->initializer
)
14539 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
14540 "ASSUMED SIZE and so cannot have a default initializer",
14541 sym
->name
, &sym
->declared_at
);
14548 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14549 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
14551 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
14552 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14557 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14558 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
14560 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
14561 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14566 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14567 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14568 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14569 || class_attr
.codimension
)
14570 && (sym
->attr
.result
|| sym
->result
== sym
))
14572 gfc_error ("Function result %qs at %L shall not be a coarray or have "
14573 "a coarray component", sym
->name
, &sym
->declared_at
);
14578 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
14579 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
14581 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14582 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
14587 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14588 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14589 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14590 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
14591 || class_attr
.allocatable
))
14593 gfc_error ("Variable %qs at %L with coarray component shall be a "
14594 "nonpointer, nonallocatable scalar, which is not a coarray",
14595 sym
->name
, &sym
->declared_at
);
14599 /* F2008, C526. The function-result case was handled above. */
14600 if (class_attr
.codimension
14601 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
14602 || sym
->attr
.select_type_temporary
14603 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14604 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14605 || sym
->ns
->proc_name
->attr
.is_main_program
14606 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
14608 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
14609 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
14613 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
14614 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
14616 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
14617 "deferred shape", sym
->name
, &sym
->declared_at
);
14620 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
14621 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
14623 gfc_error ("Allocatable coarray variable %qs at %L must have "
14624 "deferred shape", sym
->name
, &sym
->declared_at
);
14629 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14630 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14631 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14632 || (class_attr
.codimension
&& class_attr
.allocatable
))
14633 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
14635 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
14636 "allocatable coarray or have coarray components",
14637 sym
->name
, &sym
->declared_at
);
14641 if (class_attr
.codimension
&& sym
->attr
.dummy
14642 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
14644 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
14645 "procedure %qs", sym
->name
, &sym
->declared_at
,
14646 sym
->ns
->proc_name
->name
);
14650 if (sym
->ts
.type
== BT_LOGICAL
14651 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
14652 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
14653 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
14656 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
14657 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
14659 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
14660 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
14661 "%L with non-C_Bool kind in BIND(C) procedure "
14662 "%qs", sym
->name
, &sym
->declared_at
,
14663 sym
->ns
->proc_name
->name
))
14665 else if (!gfc_logical_kinds
[i
].c_bool
14666 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
14667 "%qs at %L with non-C_Bool kind in "
14668 "BIND(C) procedure %qs", sym
->name
,
14670 sym
->attr
.function
? sym
->name
14671 : sym
->ns
->proc_name
->name
))
14675 switch (sym
->attr
.flavor
)
14678 if (!resolve_fl_variable (sym
, mp_flag
))
14683 if (sym
->formal
&& !sym
->formal_ns
)
14685 /* Check that none of the arguments are a namelist. */
14686 gfc_formal_arglist
*formal
= sym
->formal
;
14688 for (; formal
; formal
= formal
->next
)
14689 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
14691 gfc_error ("Namelist '%s' can not be an argument to "
14692 "subroutine or function at %L",
14693 formal
->sym
->name
, &sym
->declared_at
);
14698 if (!resolve_fl_procedure (sym
, mp_flag
))
14703 if (!resolve_fl_namelist (sym
))
14708 if (!resolve_fl_parameter (sym
))
14716 /* Resolve array specifier. Check as well some constraints
14717 on COMMON blocks. */
14719 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
14721 /* Set the formal_arg_flag so that check_conflict will not throw
14722 an error for host associated variables in the specification
14723 expression for an array_valued function. */
14724 if (sym
->attr
.function
&& sym
->as
)
14725 formal_arg_flag
= true;
14727 saved_specification_expr
= specification_expr
;
14728 specification_expr
= true;
14729 gfc_resolve_array_spec (sym
->as
, check_constant
);
14730 specification_expr
= saved_specification_expr
;
14732 formal_arg_flag
= false;
14734 /* Resolve formal namespaces. */
14735 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
14736 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
14737 gfc_resolve (sym
->formal_ns
);
14739 /* Make sure the formal namespace is present. */
14740 if (sym
->formal
&& !sym
->formal_ns
)
14742 gfc_formal_arglist
*formal
= sym
->formal
;
14743 while (formal
&& !formal
->sym
)
14744 formal
= formal
->next
;
14748 sym
->formal_ns
= formal
->sym
->ns
;
14749 if (sym
->ns
!= formal
->sym
->ns
)
14750 sym
->formal_ns
->refs
++;
14754 /* Check threadprivate restrictions. */
14755 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
14756 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14757 && (!sym
->attr
.in_common
14758 && sym
->module
== NULL
14759 && (sym
->ns
->proc_name
== NULL
14760 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
14761 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
14763 /* Check omp declare target restrictions. */
14764 if (sym
->attr
.omp_declare_target
14765 && sym
->attr
.flavor
== FL_VARIABLE
14767 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14768 && (!sym
->attr
.in_common
14769 && sym
->module
== NULL
14770 && (sym
->ns
->proc_name
== NULL
14771 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
14772 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
14773 sym
->name
, &sym
->declared_at
);
14775 /* If we have come this far we can apply default-initializers, as
14776 described in 14.7.5, to those variables that have not already
14777 been assigned one. */
14778 if (sym
->ts
.type
== BT_DERIVED
14780 && !sym
->attr
.allocatable
14781 && !sym
->attr
.alloc_comp
)
14783 symbol_attribute
*a
= &sym
->attr
;
14785 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
14786 && !a
->in_common
&& !a
->use_assoc
14787 && !a
->result
&& !a
->function
)
14788 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
14789 apply_default_init (sym
);
14790 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
14791 && (sym
->ts
.u
.derived
->attr
.alloc_comp
14792 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
14793 /* Mark the result symbol to be referenced, when it has allocatable
14795 sym
->result
->attr
.referenced
= 1;
14798 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
14799 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
14800 && !CLASS_DATA (sym
)->attr
.class_pointer
14801 && !CLASS_DATA (sym
)->attr
.allocatable
)
14802 apply_default_init (sym
);
14804 /* If this symbol has a type-spec, check it. */
14805 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
14806 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
14807 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
14812 /************* Resolve DATA statements *************/
14816 gfc_data_value
*vnode
;
14822 /* Advance the values structure to point to the next value in the data list. */
14825 next_data_value (void)
14827 while (mpz_cmp_ui (values
.left
, 0) == 0)
14830 if (values
.vnode
->next
== NULL
)
14833 values
.vnode
= values
.vnode
->next
;
14834 mpz_set (values
.left
, values
.vnode
->repeat
);
14842 check_data_variable (gfc_data_variable
*var
, locus
*where
)
14848 ar_type mark
= AR_UNKNOWN
;
14850 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
14856 if (!gfc_resolve_expr (var
->expr
))
14860 mpz_init_set_si (offset
, 0);
14863 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
14864 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
14865 e
= e
->value
.function
.actual
->expr
;
14867 if (e
->expr_type
!= EXPR_VARIABLE
)
14868 gfc_internal_error ("check_data_variable(): Bad expression");
14870 sym
= e
->symtree
->n
.sym
;
14872 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
14874 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
14875 sym
->name
, &sym
->declared_at
);
14878 if (e
->ref
== NULL
&& sym
->as
)
14880 gfc_error ("DATA array %qs at %L must be specified in a previous"
14881 " declaration", sym
->name
, where
);
14885 has_pointer
= sym
->attr
.pointer
;
14887 if (gfc_is_coindexed (e
))
14889 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
14894 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
14896 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
14900 && ref
->type
== REF_ARRAY
14901 && ref
->u
.ar
.type
!= AR_FULL
)
14903 gfc_error ("DATA element %qs at %L is a pointer and so must "
14904 "be a full array", sym
->name
, where
);
14909 if (e
->rank
== 0 || has_pointer
)
14911 mpz_init_set_ui (size
, 1);
14918 /* Find the array section reference. */
14919 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
14921 if (ref
->type
!= REF_ARRAY
)
14923 if (ref
->u
.ar
.type
== AR_ELEMENT
)
14929 /* Set marks according to the reference pattern. */
14930 switch (ref
->u
.ar
.type
)
14938 /* Get the start position of array section. */
14939 gfc_get_section_index (ar
, section_index
, &offset
);
14944 gcc_unreachable ();
14947 if (!gfc_array_size (e
, &size
))
14949 gfc_error ("Nonconstant array section at %L in DATA statement",
14951 mpz_clear (offset
);
14958 while (mpz_cmp_ui (size
, 0) > 0)
14960 if (!next_data_value ())
14962 gfc_error ("DATA statement at %L has more variables than values",
14968 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
14972 /* If we have more than one element left in the repeat count,
14973 and we have more than one element left in the target variable,
14974 then create a range assignment. */
14975 /* FIXME: Only done for full arrays for now, since array sections
14977 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
14978 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
14982 if (mpz_cmp (size
, values
.left
) >= 0)
14984 mpz_init_set (range
, values
.left
);
14985 mpz_sub (size
, size
, values
.left
);
14986 mpz_set_ui (values
.left
, 0);
14990 mpz_init_set (range
, size
);
14991 mpz_sub (values
.left
, values
.left
, size
);
14992 mpz_set_ui (size
, 0);
14995 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
14998 mpz_add (offset
, offset
, range
);
15005 /* Assign initial value to symbol. */
15008 mpz_sub_ui (values
.left
, values
.left
, 1);
15009 mpz_sub_ui (size
, size
, 1);
15011 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15016 if (mark
== AR_FULL
)
15017 mpz_add_ui (offset
, offset
, 1);
15019 /* Modify the array section indexes and recalculate the offset
15020 for next element. */
15021 else if (mark
== AR_SECTION
)
15022 gfc_advance_section (section_index
, ar
, &offset
);
15026 if (mark
== AR_SECTION
)
15028 for (i
= 0; i
< ar
->dimen
; i
++)
15029 mpz_clear (section_index
[i
]);
15033 mpz_clear (offset
);
15039 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15041 /* Iterate over a list of elements in a DATA statement. */
15044 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15047 iterator_stack frame
;
15048 gfc_expr
*e
, *start
, *end
, *step
;
15049 bool retval
= true;
15051 mpz_init (frame
.value
);
15054 start
= gfc_copy_expr (var
->iter
.start
);
15055 end
= gfc_copy_expr (var
->iter
.end
);
15056 step
= gfc_copy_expr (var
->iter
.step
);
15058 if (!gfc_simplify_expr (start
, 1)
15059 || start
->expr_type
!= EXPR_CONSTANT
)
15061 gfc_error ("start of implied-do loop at %L could not be "
15062 "simplified to a constant value", &start
->where
);
15066 if (!gfc_simplify_expr (end
, 1)
15067 || end
->expr_type
!= EXPR_CONSTANT
)
15069 gfc_error ("end of implied-do loop at %L could not be "
15070 "simplified to a constant value", &start
->where
);
15074 if (!gfc_simplify_expr (step
, 1)
15075 || step
->expr_type
!= EXPR_CONSTANT
)
15077 gfc_error ("step of implied-do loop at %L could not be "
15078 "simplified to a constant value", &start
->where
);
15083 mpz_set (trip
, end
->value
.integer
);
15084 mpz_sub (trip
, trip
, start
->value
.integer
);
15085 mpz_add (trip
, trip
, step
->value
.integer
);
15087 mpz_div (trip
, trip
, step
->value
.integer
);
15089 mpz_set (frame
.value
, start
->value
.integer
);
15091 frame
.prev
= iter_stack
;
15092 frame
.variable
= var
->iter
.var
->symtree
;
15093 iter_stack
= &frame
;
15095 while (mpz_cmp_ui (trip
, 0) > 0)
15097 if (!traverse_data_var (var
->list
, where
))
15103 e
= gfc_copy_expr (var
->expr
);
15104 if (!gfc_simplify_expr (e
, 1))
15111 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15113 mpz_sub_ui (trip
, trip
, 1);
15117 mpz_clear (frame
.value
);
15120 gfc_free_expr (start
);
15121 gfc_free_expr (end
);
15122 gfc_free_expr (step
);
15124 iter_stack
= frame
.prev
;
15129 /* Type resolve variables in the variable list of a DATA statement. */
15132 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15136 for (; var
; var
= var
->next
)
15138 if (var
->expr
== NULL
)
15139 t
= traverse_data_list (var
, where
);
15141 t
= check_data_variable (var
, where
);
15151 /* Resolve the expressions and iterators associated with a data statement.
15152 This is separate from the assignment checking because data lists should
15153 only be resolved once. */
15156 resolve_data_variables (gfc_data_variable
*d
)
15158 for (; d
; d
= d
->next
)
15160 if (d
->list
== NULL
)
15162 if (!gfc_resolve_expr (d
->expr
))
15167 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15170 if (!resolve_data_variables (d
->list
))
15179 /* Resolve a single DATA statement. We implement this by storing a pointer to
15180 the value list into static variables, and then recursively traversing the
15181 variables list, expanding iterators and such. */
15184 resolve_data (gfc_data
*d
)
15187 if (!resolve_data_variables (d
->var
))
15190 values
.vnode
= d
->value
;
15191 if (d
->value
== NULL
)
15192 mpz_set_ui (values
.left
, 0);
15194 mpz_set (values
.left
, d
->value
->repeat
);
15196 if (!traverse_data_var (d
->var
, &d
->where
))
15199 /* At this point, we better not have any values left. */
15201 if (next_data_value ())
15202 gfc_error ("DATA statement at %L has more values than variables",
15207 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15208 accessed by host or use association, is a dummy argument to a pure function,
15209 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15210 is storage associated with any such variable, shall not be used in the
15211 following contexts: (clients of this function). */
15213 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15214 procedure. Returns zero if assignment is OK, nonzero if there is a
15217 gfc_impure_variable (gfc_symbol
*sym
)
15222 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15225 /* Check if the symbol's ns is inside the pure procedure. */
15226 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15230 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15234 proc
= sym
->ns
->proc_name
;
15235 if (sym
->attr
.dummy
15236 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15237 || proc
->attr
.function
))
15240 /* TODO: Sort out what can be storage associated, if anything, and include
15241 it here. In principle equivalences should be scanned but it does not
15242 seem to be possible to storage associate an impure variable this way. */
15247 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15248 current namespace is inside a pure procedure. */
15251 gfc_pure (gfc_symbol
*sym
)
15253 symbol_attribute attr
;
15258 /* Check if the current namespace or one of its parents
15259 belongs to a pure procedure. */
15260 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15262 sym
= ns
->proc_name
;
15266 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15274 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15278 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15279 checks if the current namespace is implicitly pure. Note that this
15280 function returns false for a PURE procedure. */
15283 gfc_implicit_pure (gfc_symbol
*sym
)
15289 /* Check if the current procedure is implicit_pure. Walk up
15290 the procedure list until we find a procedure. */
15291 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15293 sym
= ns
->proc_name
;
15297 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15302 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15303 && !sym
->attr
.pure
;
15308 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15314 /* Check if the current procedure is implicit_pure. Walk up
15315 the procedure list until we find a procedure. */
15316 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15318 sym
= ns
->proc_name
;
15322 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15327 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15328 sym
->attr
.implicit_pure
= 0;
15330 sym
->attr
.pure
= 0;
15334 /* Test whether the current procedure is elemental or not. */
15337 gfc_elemental (gfc_symbol
*sym
)
15339 symbol_attribute attr
;
15342 sym
= gfc_current_ns
->proc_name
;
15347 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15351 /* Warn about unused labels. */
15354 warn_unused_fortran_label (gfc_st_label
*label
)
15359 warn_unused_fortran_label (label
->left
);
15361 if (label
->defined
== ST_LABEL_UNKNOWN
)
15364 switch (label
->referenced
)
15366 case ST_LABEL_UNKNOWN
:
15367 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15368 label
->value
, &label
->where
);
15371 case ST_LABEL_BAD_TARGET
:
15372 gfc_warning (OPT_Wunused_label
,
15373 "Label %d at %L defined but cannot be used",
15374 label
->value
, &label
->where
);
15381 warn_unused_fortran_label (label
->right
);
15385 /* Returns the sequence type of a symbol or sequence. */
15388 sequence_type (gfc_typespec ts
)
15397 if (ts
.u
.derived
->components
== NULL
)
15398 return SEQ_NONDEFAULT
;
15400 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15401 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15402 if (sequence_type (c
->ts
) != result
)
15408 if (ts
.kind
!= gfc_default_character_kind
)
15409 return SEQ_NONDEFAULT
;
15411 return SEQ_CHARACTER
;
15414 if (ts
.kind
!= gfc_default_integer_kind
)
15415 return SEQ_NONDEFAULT
;
15417 return SEQ_NUMERIC
;
15420 if (!(ts
.kind
== gfc_default_real_kind
15421 || ts
.kind
== gfc_default_double_kind
))
15422 return SEQ_NONDEFAULT
;
15424 return SEQ_NUMERIC
;
15427 if (ts
.kind
!= gfc_default_complex_kind
)
15428 return SEQ_NONDEFAULT
;
15430 return SEQ_NUMERIC
;
15433 if (ts
.kind
!= gfc_default_logical_kind
)
15434 return SEQ_NONDEFAULT
;
15436 return SEQ_NUMERIC
;
15439 return SEQ_NONDEFAULT
;
15444 /* Resolve derived type EQUIVALENCE object. */
15447 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15449 gfc_component
*c
= derived
->components
;
15454 /* Shall not be an object of nonsequence derived type. */
15455 if (!derived
->attr
.sequence
)
15457 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15458 "attribute to be an EQUIVALENCE object", sym
->name
,
15463 /* Shall not have allocatable components. */
15464 if (derived
->attr
.alloc_comp
)
15466 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15467 "components to be an EQUIVALENCE object",sym
->name
,
15472 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15474 gfc_error ("Derived type variable %qs at %L with default "
15475 "initialization cannot be in EQUIVALENCE with a variable "
15476 "in COMMON", sym
->name
, &e
->where
);
15480 for (; c
; c
= c
->next
)
15482 if (gfc_bt_struct (c
->ts
.type
)
15483 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15486 /* Shall not be an object of sequence derived type containing a pointer
15487 in the structure. */
15488 if (c
->attr
.pointer
)
15490 gfc_error ("Derived type variable %qs at %L with pointer "
15491 "component(s) cannot be an EQUIVALENCE object",
15492 sym
->name
, &e
->where
);
15500 /* Resolve equivalence object.
15501 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15502 an allocatable array, an object of nonsequence derived type, an object of
15503 sequence derived type containing a pointer at any level of component
15504 selection, an automatic object, a function name, an entry name, a result
15505 name, a named constant, a structure component, or a subobject of any of
15506 the preceding objects. A substring shall not have length zero. A
15507 derived type shall not have components with default initialization nor
15508 shall two objects of an equivalence group be initialized.
15509 Either all or none of the objects shall have an protected attribute.
15510 The simple constraints are done in symbol.c(check_conflict) and the rest
15511 are implemented here. */
15514 resolve_equivalence (gfc_equiv
*eq
)
15517 gfc_symbol
*first_sym
;
15520 locus
*last_where
= NULL
;
15521 seq_type eq_type
, last_eq_type
;
15522 gfc_typespec
*last_ts
;
15523 int object
, cnt_protected
;
15526 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15528 first_sym
= eq
->expr
->symtree
->n
.sym
;
15532 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
15536 e
->ts
= e
->symtree
->n
.sym
->ts
;
15537 /* match_varspec might not know yet if it is seeing
15538 array reference or substring reference, as it doesn't
15540 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
15542 gfc_ref
*ref
= e
->ref
;
15543 sym
= e
->symtree
->n
.sym
;
15545 if (sym
->attr
.dimension
)
15547 ref
->u
.ar
.as
= sym
->as
;
15551 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
15552 if (e
->ts
.type
== BT_CHARACTER
15554 && ref
->type
== REF_ARRAY
15555 && ref
->u
.ar
.dimen
== 1
15556 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
15557 && ref
->u
.ar
.stride
[0] == NULL
)
15559 gfc_expr
*start
= ref
->u
.ar
.start
[0];
15560 gfc_expr
*end
= ref
->u
.ar
.end
[0];
15563 /* Optimize away the (:) reference. */
15564 if (start
== NULL
&& end
== NULL
)
15567 e
->ref
= ref
->next
;
15569 e
->ref
->next
= ref
->next
;
15574 ref
->type
= REF_SUBSTRING
;
15576 start
= gfc_get_int_expr (gfc_default_integer_kind
,
15578 ref
->u
.ss
.start
= start
;
15579 if (end
== NULL
&& e
->ts
.u
.cl
)
15580 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
15581 ref
->u
.ss
.end
= end
;
15582 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
15589 /* Any further ref is an error. */
15592 gcc_assert (ref
->type
== REF_ARRAY
);
15593 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
15599 if (!gfc_resolve_expr (e
))
15602 sym
= e
->symtree
->n
.sym
;
15604 if (sym
->attr
.is_protected
)
15606 if (cnt_protected
> 0 && cnt_protected
!= object
)
15608 gfc_error ("Either all or none of the objects in the "
15609 "EQUIVALENCE set at %L shall have the "
15610 "PROTECTED attribute",
15615 /* Shall not equivalence common block variables in a PURE procedure. */
15616 if (sym
->ns
->proc_name
15617 && sym
->ns
->proc_name
->attr
.pure
15618 && sym
->attr
.in_common
)
15620 gfc_error ("Common block member %qs at %L cannot be an EQUIVALENCE "
15621 "object in the pure procedure %qs",
15622 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
15626 /* Shall not be a named constant. */
15627 if (e
->expr_type
== EXPR_CONSTANT
)
15629 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
15630 "object", sym
->name
, &e
->where
);
15634 if (e
->ts
.type
== BT_DERIVED
15635 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
15638 /* Check that the types correspond correctly:
15640 A numeric sequence structure may be equivalenced to another sequence
15641 structure, an object of default integer type, default real type, double
15642 precision real type, default logical type such that components of the
15643 structure ultimately only become associated to objects of the same
15644 kind. A character sequence structure may be equivalenced to an object
15645 of default character kind or another character sequence structure.
15646 Other objects may be equivalenced only to objects of the same type and
15647 kind parameters. */
15649 /* Identical types are unconditionally OK. */
15650 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
15651 goto identical_types
;
15653 last_eq_type
= sequence_type (*last_ts
);
15654 eq_type
= sequence_type (sym
->ts
);
15656 /* Since the pair of objects is not of the same type, mixed or
15657 non-default sequences can be rejected. */
15659 msg
= "Sequence %s with mixed components in EQUIVALENCE "
15660 "statement at %L with different type objects";
15662 && last_eq_type
== SEQ_MIXED
15663 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
15664 || (eq_type
== SEQ_MIXED
15665 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
15668 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
15669 "statement at %L with objects of different type";
15671 && last_eq_type
== SEQ_NONDEFAULT
15672 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
15673 || (eq_type
== SEQ_NONDEFAULT
15674 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
15677 msg
="Non-CHARACTER object %qs in default CHARACTER "
15678 "EQUIVALENCE statement at %L";
15679 if (last_eq_type
== SEQ_CHARACTER
15680 && eq_type
!= SEQ_CHARACTER
15681 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
15684 msg
="Non-NUMERIC object %qs in default NUMERIC "
15685 "EQUIVALENCE statement at %L";
15686 if (last_eq_type
== SEQ_NUMERIC
15687 && eq_type
!= SEQ_NUMERIC
15688 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
15693 last_where
= &e
->where
;
15698 /* Shall not be an automatic array. */
15699 if (e
->ref
->type
== REF_ARRAY
15700 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
15702 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
15703 "an EQUIVALENCE object", sym
->name
, &e
->where
);
15710 /* Shall not be a structure component. */
15711 if (r
->type
== REF_COMPONENT
)
15713 gfc_error ("Structure component %qs at %L cannot be an "
15714 "EQUIVALENCE object",
15715 r
->u
.c
.component
->name
, &e
->where
);
15719 /* A substring shall not have length zero. */
15720 if (r
->type
== REF_SUBSTRING
)
15722 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
15724 gfc_error ("Substring at %L has length zero",
15725 &r
->u
.ss
.start
->where
);
15735 /* Function called by resolve_fntype to flag other symbol used in the
15736 length type parameter specification of function resuls. */
15739 flag_fn_result_spec (gfc_expr
*expr
,
15740 gfc_symbol
*sym ATTRIBUTE_UNUSED
,
15741 int *f ATTRIBUTE_UNUSED
)
15746 if (expr
->expr_type
== EXPR_VARIABLE
)
15748 s
= expr
->symtree
->n
.sym
;
15749 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
15753 if (!s
->fn_result_spec
15754 && s
->attr
.flavor
== FL_PARAMETER
)
15756 /* Function contained in a module.... */
15757 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
15760 s
->fn_result_spec
= 1;
15761 /* Make sure that this symbol is translated as a module
15763 st
= gfc_get_unique_symtree (ns
);
15767 /* ... which is use associated and called. */
15768 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
15770 /* External function matched with an interface. */
15773 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
15774 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
15775 && s
->ns
->proc_name
->attr
.function
))
15776 s
->fn_result_spec
= 1;
15783 /* Resolve function and ENTRY types, issue diagnostics if needed. */
15786 resolve_fntype (gfc_namespace
*ns
)
15788 gfc_entry_list
*el
;
15791 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
15794 /* If there are any entries, ns->proc_name is the entry master
15795 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
15797 sym
= ns
->entries
->sym
;
15799 sym
= ns
->proc_name
;
15800 if (sym
->result
== sym
15801 && sym
->ts
.type
== BT_UNKNOWN
15802 && !gfc_set_default_type (sym
, 0, NULL
)
15803 && !sym
->attr
.untyped
)
15805 gfc_error ("Function %qs at %L has no IMPLICIT type",
15806 sym
->name
, &sym
->declared_at
);
15807 sym
->attr
.untyped
= 1;
15810 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
15811 && !sym
->attr
.contained
15812 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15813 && gfc_check_symbol_access (sym
))
15815 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
15816 "%L of PRIVATE type %qs", sym
->name
,
15817 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15821 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
15823 if (el
->sym
->result
== el
->sym
15824 && el
->sym
->ts
.type
== BT_UNKNOWN
15825 && !gfc_set_default_type (el
->sym
, 0, NULL
)
15826 && !el
->sym
->attr
.untyped
)
15828 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
15829 el
->sym
->name
, &el
->sym
->declared_at
);
15830 el
->sym
->attr
.untyped
= 1;
15834 if (sym
->ts
.type
== BT_CHARACTER
)
15835 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, NULL
, flag_fn_result_spec
, 0);
15839 /* 12.3.2.1.1 Defined operators. */
15842 check_uop_procedure (gfc_symbol
*sym
, locus where
)
15844 gfc_formal_arglist
*formal
;
15846 if (!sym
->attr
.function
)
15848 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
15849 sym
->name
, &where
);
15853 if (sym
->ts
.type
== BT_CHARACTER
15854 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
15855 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
15856 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
15858 gfc_error ("User operator procedure %qs at %L cannot be assumed "
15859 "character length", sym
->name
, &where
);
15863 formal
= gfc_sym_get_dummy_args (sym
);
15864 if (!formal
|| !formal
->sym
)
15866 gfc_error ("User operator procedure %qs at %L must have at least "
15867 "one argument", sym
->name
, &where
);
15871 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
15873 gfc_error ("First argument of operator interface at %L must be "
15874 "INTENT(IN)", &where
);
15878 if (formal
->sym
->attr
.optional
)
15880 gfc_error ("First argument of operator interface at %L cannot be "
15881 "optional", &where
);
15885 formal
= formal
->next
;
15886 if (!formal
|| !formal
->sym
)
15889 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
15891 gfc_error ("Second argument of operator interface at %L must be "
15892 "INTENT(IN)", &where
);
15896 if (formal
->sym
->attr
.optional
)
15898 gfc_error ("Second argument of operator interface at %L cannot be "
15899 "optional", &where
);
15905 gfc_error ("Operator interface at %L must have, at most, two "
15906 "arguments", &where
);
15914 gfc_resolve_uops (gfc_symtree
*symtree
)
15916 gfc_interface
*itr
;
15918 if (symtree
== NULL
)
15921 gfc_resolve_uops (symtree
->left
);
15922 gfc_resolve_uops (symtree
->right
);
15924 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
15925 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
15929 /* Examine all of the expressions associated with a program unit,
15930 assign types to all intermediate expressions, make sure that all
15931 assignments are to compatible types and figure out which names
15932 refer to which functions or subroutines. It doesn't check code
15933 block, which is handled by gfc_resolve_code. */
15936 resolve_types (gfc_namespace
*ns
)
15942 gfc_namespace
* old_ns
= gfc_current_ns
;
15944 if (ns
->types_resolved
)
15947 /* Check that all IMPLICIT types are ok. */
15948 if (!ns
->seen_implicit_none
)
15951 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
15952 if (ns
->set_flag
[letter
]
15953 && !resolve_typespec_used (&ns
->default_type
[letter
],
15954 &ns
->implicit_loc
[letter
], NULL
))
15958 gfc_current_ns
= ns
;
15960 resolve_entries (ns
);
15962 resolve_common_vars (&ns
->blank_common
, false);
15963 resolve_common_blocks (ns
->common_root
);
15965 resolve_contained_functions (ns
);
15967 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
15968 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
15969 resolve_formal_arglist (ns
->proc_name
);
15971 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
15973 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
15974 resolve_charlen (cl
);
15976 gfc_traverse_ns (ns
, resolve_symbol
);
15978 resolve_fntype (ns
);
15980 for (n
= ns
->contained
; n
; n
= n
->sibling
)
15982 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
15983 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
15984 "also be PURE", n
->proc_name
->name
,
15985 &n
->proc_name
->declared_at
);
15991 gfc_do_concurrent_flag
= 0;
15992 gfc_check_interfaces (ns
);
15994 gfc_traverse_ns (ns
, resolve_values
);
16000 for (d
= ns
->data
; d
; d
= d
->next
)
16004 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16006 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16008 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16009 resolve_equivalence (eq
);
16011 /* Warn about unused labels. */
16012 if (warn_unused_label
)
16013 warn_unused_fortran_label (ns
->st_labels
);
16015 gfc_resolve_uops (ns
->uop_root
);
16017 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16019 gfc_resolve_omp_declare_simd (ns
);
16021 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16023 ns
->types_resolved
= 1;
16025 gfc_current_ns
= old_ns
;
16029 /* Call gfc_resolve_code recursively. */
16032 resolve_codes (gfc_namespace
*ns
)
16035 bitmap_obstack old_obstack
;
16037 if (ns
->resolved
== 1)
16040 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16043 gfc_current_ns
= ns
;
16045 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16046 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16049 /* Set to an out of range value. */
16050 current_entry_id
= -1;
16052 old_obstack
= labels_obstack
;
16053 bitmap_obstack_initialize (&labels_obstack
);
16055 gfc_resolve_oacc_declare (ns
);
16056 gfc_resolve_code (ns
->code
, ns
);
16058 bitmap_obstack_release (&labels_obstack
);
16059 labels_obstack
= old_obstack
;
16063 /* This function is called after a complete program unit has been compiled.
16064 Its purpose is to examine all of the expressions associated with a program
16065 unit, assign types to all intermediate expressions, make sure that all
16066 assignments are to compatible types and figure out which names refer to
16067 which functions or subroutines. */
16070 gfc_resolve (gfc_namespace
*ns
)
16072 gfc_namespace
*old_ns
;
16073 code_stack
*old_cs_base
;
16074 struct gfc_omp_saved_state old_omp_state
;
16080 old_ns
= gfc_current_ns
;
16081 old_cs_base
= cs_base
;
16083 /* As gfc_resolve can be called during resolution of an OpenMP construct
16084 body, we should clear any state associated to it, so that say NS's
16085 DO loops are not interpreted as OpenMP loops. */
16086 if (!ns
->construct_entities
)
16087 gfc_omp_save_and_clear_state (&old_omp_state
);
16089 resolve_types (ns
);
16090 component_assignment_level
= 0;
16091 resolve_codes (ns
);
16093 gfc_current_ns
= old_ns
;
16094 cs_base
= old_cs_base
;
16097 gfc_run_passes (ns
);
16099 if (!ns
->construct_entities
)
16100 gfc_omp_restore_state (&old_omp_state
);