1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2020 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 gfc_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 gfc_resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 gfc_resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
589 /* Try to find out of what the return type is. */
590 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
592 t
= gfc_set_default_type (sym
->result
, 0, ns
);
594 if (!t
&& !sym
->result
->attr
.untyped
)
596 if (sym
->result
== sym
)
597 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
598 sym
->name
, &sym
->declared_at
);
599 else if (!sym
->result
->attr
.proc_pointer
)
600 gfc_error ("Result %qs of contained function %qs at %L has "
601 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
602 &sym
->result
->declared_at
);
603 sym
->result
->attr
.untyped
= 1;
607 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
608 type, lists the only ways a character length value of * can be used:
609 dummy arguments of procedures, named constants, function results and
610 in allocate statements if the allocate_object is an assumed length dummy
611 in external functions. Internal function results and results of module
612 procedures are not on this list, ergo, not permitted. */
614 if (sym
->result
->ts
.type
== BT_CHARACTER
)
616 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
617 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
619 /* See if this is a module-procedure and adapt error message
622 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
623 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
625 gfc_error (module_proc
626 ? G_("Character-valued module procedure %qs at %L"
627 " must not be assumed length")
628 : G_("Character-valued internal function %qs at %L"
629 " must not be assumed length"),
630 sym
->name
, &sym
->declared_at
);
636 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
637 introduce duplicates. */
640 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
642 gfc_formal_arglist
*f
, *new_arglist
;
645 for (; new_args
!= NULL
; new_args
= new_args
->next
)
647 new_sym
= new_args
->sym
;
648 /* See if this arg is already in the formal argument list. */
649 for (f
= proc
->formal
; f
; f
= f
->next
)
651 if (new_sym
== f
->sym
)
658 /* Add a new argument. Argument order is not important. */
659 new_arglist
= gfc_get_formal_arglist ();
660 new_arglist
->sym
= new_sym
;
661 new_arglist
->next
= proc
->formal
;
662 proc
->formal
= new_arglist
;
667 /* Flag the arguments that are not present in all entries. */
670 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
672 gfc_formal_arglist
*f
, *head
;
675 for (f
= proc
->formal
; f
; f
= f
->next
)
680 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
682 if (new_args
->sym
== f
->sym
)
689 f
->sym
->attr
.not_always_present
= 1;
694 /* Resolve alternate entry points. If a symbol has multiple entry points we
695 create a new master symbol for the main routine, and turn the existing
696 symbol into an entry point. */
699 resolve_entries (gfc_namespace
*ns
)
701 gfc_namespace
*old_ns
;
705 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
706 static int master_count
= 0;
708 if (ns
->proc_name
== NULL
)
711 /* No need to do anything if this procedure doesn't have alternate entry
716 /* We may already have resolved alternate entry points. */
717 if (ns
->proc_name
->attr
.entry_master
)
720 /* If this isn't a procedure something has gone horribly wrong. */
721 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
723 /* Remember the current namespace. */
724 old_ns
= gfc_current_ns
;
728 /* Add the main entry point to the list of entry points. */
729 el
= gfc_get_entry_list ();
730 el
->sym
= ns
->proc_name
;
732 el
->next
= ns
->entries
;
734 ns
->proc_name
->attr
.entry
= 1;
736 /* If it is a module function, it needs to be in the right namespace
737 so that gfc_get_fake_result_decl can gather up the results. The
738 need for this arose in get_proc_name, where these beasts were
739 left in their own namespace, to keep prior references linked to
740 the entry declaration.*/
741 if (ns
->proc_name
->attr
.function
742 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
745 /* Do the same for entries where the master is not a module
746 procedure. These are retained in the module namespace because
747 of the module procedure declaration. */
748 for (el
= el
->next
; el
; el
= el
->next
)
749 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
750 && el
->sym
->attr
.mod_proc
)
754 /* Add an entry statement for it. */
755 c
= gfc_get_code (EXEC_ENTRY
);
760 /* Create a new symbol for the master function. */
761 /* Give the internal function a unique name (within this file).
762 Also include the function name so the user has some hope of figuring
763 out what is going on. */
764 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
765 master_count
++, ns
->proc_name
->name
);
766 gfc_get_ha_symbol (name
, &proc
);
767 gcc_assert (proc
!= NULL
);
769 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
770 if (ns
->proc_name
->attr
.subroutine
)
771 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
775 gfc_typespec
*ts
, *fts
;
776 gfc_array_spec
*as
, *fas
;
777 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
779 fas
= ns
->entries
->sym
->as
;
780 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
781 fts
= &ns
->entries
->sym
->result
->ts
;
782 if (fts
->type
== BT_UNKNOWN
)
783 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
784 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
786 ts
= &el
->sym
->result
->ts
;
788 as
= as
? as
: el
->sym
->result
->as
;
789 if (ts
->type
== BT_UNKNOWN
)
790 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
792 if (! gfc_compare_types (ts
, fts
)
793 || (el
->sym
->result
->attr
.dimension
794 != ns
->entries
->sym
->result
->attr
.dimension
)
795 || (el
->sym
->result
->attr
.pointer
796 != ns
->entries
->sym
->result
->attr
.pointer
))
798 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
799 && gfc_compare_array_spec (as
, fas
) == 0)
800 gfc_error ("Function %s at %L has entries with mismatched "
801 "array specifications", ns
->entries
->sym
->name
,
802 &ns
->entries
->sym
->declared_at
);
803 /* The characteristics need to match and thus both need to have
804 the same string length, i.e. both len=*, or both len=4.
805 Having both len=<variable> is also possible, but difficult to
806 check at compile time. */
807 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
808 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
809 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
811 && ts
->u
.cl
->length
->expr_type
812 != fts
->u
.cl
->length
->expr_type
)
814 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
815 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
816 fts
->u
.cl
->length
->value
.integer
) != 0)))
817 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
818 "entries returning variables of different "
819 "string lengths", ns
->entries
->sym
->name
,
820 &ns
->entries
->sym
->declared_at
);
825 sym
= ns
->entries
->sym
->result
;
826 /* All result types the same. */
828 if (sym
->attr
.dimension
)
829 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
830 if (sym
->attr
.pointer
)
831 gfc_add_pointer (&proc
->attr
, NULL
);
835 /* Otherwise the result will be passed through a union by
837 proc
->attr
.mixed_entry_master
= 1;
838 for (el
= ns
->entries
; el
; el
= el
->next
)
840 sym
= el
->sym
->result
;
841 if (sym
->attr
.dimension
)
843 if (el
== ns
->entries
)
844 gfc_error ("FUNCTION result %s cannot be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 gfc_error ("ENTRY result %s cannot be an array in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 else if (sym
->attr
.pointer
)
854 if (el
== ns
->entries
)
855 gfc_error ("FUNCTION result %s cannot be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 gfc_error ("ENTRY result %s cannot be a POINTER in "
860 "FUNCTION %s at %L", sym
->name
,
861 ns
->entries
->sym
->name
, &sym
->declared_at
);
866 if (ts
->type
== BT_UNKNOWN
)
867 ts
= gfc_get_default_type (sym
->name
, NULL
);
871 if (ts
->kind
== gfc_default_integer_kind
)
875 if (ts
->kind
== gfc_default_real_kind
876 || ts
->kind
== gfc_default_double_kind
)
880 if (ts
->kind
== gfc_default_complex_kind
)
884 if (ts
->kind
== gfc_default_logical_kind
)
888 /* We will issue error elsewhere. */
896 if (el
== ns
->entries
)
897 gfc_error ("FUNCTION result %s cannot be of type %s "
898 "in FUNCTION %s at %L", sym
->name
,
899 gfc_typename (ts
), ns
->entries
->sym
->name
,
902 gfc_error ("ENTRY result %s cannot be of type %s "
903 "in FUNCTION %s at %L", sym
->name
,
904 gfc_typename (ts
), ns
->entries
->sym
->name
,
911 proc
->attr
.access
= ACCESS_PRIVATE
;
912 proc
->attr
.entry_master
= 1;
914 /* Merge all the entry point arguments. */
915 for (el
= ns
->entries
; el
; el
= el
->next
)
916 merge_argument_lists (proc
, el
->sym
->formal
);
918 /* Check the master formal arguments for any that are not
919 present in all entry points. */
920 for (el
= ns
->entries
; el
; el
= el
->next
)
921 check_argument_lists (proc
, el
->sym
->formal
);
923 /* Use the master function for the function body. */
924 ns
->proc_name
= proc
;
926 /* Finalize the new symbols. */
927 gfc_commit_symbols ();
929 /* Restore the original namespace. */
930 gfc_current_ns
= old_ns
;
934 /* Resolve common variables. */
936 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
938 gfc_symbol
*csym
= common_block
->head
;
940 for (; csym
; csym
= csym
->common_next
)
942 /* gfc_add_in_common may have been called before, but the reported errors
943 have been ignored to continue parsing.
944 We do the checks again here. */
945 if (!csym
->attr
.use_assoc
)
947 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
948 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
949 &common_block
->where
);
952 if (csym
->value
|| csym
->attr
.data
)
954 if (!csym
->ns
->is_block_data
)
955 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
956 "but only in BLOCK DATA initialization is "
957 "allowed", csym
->name
, &csym
->declared_at
);
958 else if (!named_common
)
959 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
960 "in a blank COMMON but initialization is only "
961 "allowed in named common blocks", csym
->name
,
965 if (UNLIMITED_POLY (csym
))
966 gfc_error_now ("%qs in cannot appear in COMMON at %L "
967 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.type
!= BT_DERIVED
)
972 if (!(csym
->ts
.u
.derived
->attr
.sequence
973 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "has neither the SEQUENCE nor the BIND(C) "
976 "attribute", csym
->name
, &csym
->declared_at
);
977 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
978 gfc_error_now ("Derived type variable %qs in COMMON at %L "
979 "has an ultimate component that is "
980 "allocatable", csym
->name
, &csym
->declared_at
);
981 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
982 gfc_error_now ("Derived type variable %qs in COMMON at %L "
983 "may not have default initializer", csym
->name
,
986 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
987 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
991 /* Resolve common blocks. */
993 resolve_common_blocks (gfc_symtree
*common_root
)
998 if (common_root
== NULL
)
1001 if (common_root
->left
)
1002 resolve_common_blocks (common_root
->left
);
1003 if (common_root
->right
)
1004 resolve_common_blocks (common_root
->right
);
1006 resolve_common_vars (common_root
->n
.common
, true);
1008 /* The common name is a global name - in Fortran 2003 also if it has a
1009 C binding name, since Fortran 2008 only the C binding name is a global
1011 if (!common_root
->n
.common
->binding_label
1012 || gfc_notification_std (GFC_STD_F2008
))
1014 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1015 common_root
->n
.common
->name
);
1017 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1018 && gsym
->type
== GSYM_COMMON
1019 && ((common_root
->n
.common
->binding_label
1020 && (!gsym
->binding_label
1021 || strcmp (common_root
->n
.common
->binding_label
,
1022 gsym
->binding_label
) != 0))
1023 || (!common_root
->n
.common
->binding_label
1024 && gsym
->binding_label
)))
1026 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1027 "identifier and must thus have the same binding name "
1028 "as the same-named COMMON block at %L: %s vs %s",
1029 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1031 common_root
->n
.common
->binding_label
1032 ? common_root
->n
.common
->binding_label
: "(blank)",
1033 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1037 if (gsym
&& gsym
->type
!= GSYM_COMMON
1038 && !common_root
->n
.common
->binding_label
)
1040 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1042 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1046 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1048 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1049 "%L sharing the identifier with global non-COMMON-block "
1050 "entity at %L", common_root
->n
.common
->name
,
1051 &common_root
->n
.common
->where
, &gsym
->where
);
1056 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
, false);
1057 gsym
->type
= GSYM_COMMON
;
1058 gsym
->where
= common_root
->n
.common
->where
;
1064 if (common_root
->n
.common
->binding_label
)
1066 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1067 common_root
->n
.common
->binding_label
);
1068 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1070 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1071 "global identifier as entity at %L",
1072 &common_root
->n
.common
->where
,
1073 common_root
->n
.common
->binding_label
, &gsym
->where
);
1078 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
, true);
1079 gsym
->type
= GSYM_COMMON
;
1080 gsym
->where
= common_root
->n
.common
->where
;
1086 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1090 if (sym
->attr
.flavor
== FL_PARAMETER
)
1091 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1092 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1094 if (sym
->attr
.external
)
1095 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1096 sym
->name
, &common_root
->n
.common
->where
);
1098 if (sym
->attr
.intrinsic
)
1099 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1100 sym
->name
, &common_root
->n
.common
->where
);
1101 else if (sym
->attr
.result
1102 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1103 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1104 "that is also a function result", sym
->name
,
1105 &common_root
->n
.common
->where
);
1106 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1107 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1108 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1109 "that is also a global procedure", sym
->name
,
1110 &common_root
->n
.common
->where
);
1114 /* Resolve contained function types. Because contained functions can call one
1115 another, they have to be worked out before any of the contained procedures
1118 The good news is that if a function doesn't already have a type, the only
1119 way it can get one is through an IMPLICIT type or a RESULT variable, because
1120 by definition contained functions are contained namespace they're contained
1121 in, not in a sibling or parent namespace. */
1124 resolve_contained_functions (gfc_namespace
*ns
)
1126 gfc_namespace
*child
;
1129 resolve_formal_arglists (ns
);
1131 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1133 /* Resolve alternate entry points first. */
1134 resolve_entries (child
);
1136 /* Then check function return types. */
1137 resolve_contained_fntype (child
->proc_name
, child
);
1138 for (el
= child
->entries
; el
; el
= el
->next
)
1139 resolve_contained_fntype (el
->sym
, child
);
1145 /* A Parameterized Derived Type constructor must contain values for
1146 the PDT KIND parameters or they must have a default initializer.
1147 Go through the constructor picking out the KIND expressions,
1148 storing them in 'param_list' and then call gfc_get_pdt_instance
1149 to obtain the PDT instance. */
1151 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1154 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1156 param
= gfc_get_actual_arglist ();
1158 param_list
= param_tail
= param
;
1161 param_tail
->next
= param
;
1162 param_tail
= param_tail
->next
;
1165 param_tail
->name
= c
->name
;
1167 param_tail
->expr
= gfc_copy_expr (expr
);
1168 else if (c
->initializer
)
1169 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1172 param_tail
->spec_type
= SPEC_ASSUMED
;
1173 if (c
->attr
.pdt_kind
)
1175 gfc_error ("The KIND parameter %qs in the PDT constructor "
1176 "at %C has no value", param
->name
);
1185 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1186 gfc_symbol
*derived
)
1188 gfc_constructor
*cons
= NULL
;
1189 gfc_component
*comp
;
1192 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1193 cons
= gfc_constructor_first (expr
->value
.constructor
);
1198 comp
= derived
->components
;
1200 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1203 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1204 && comp
->ts
.type
== BT_DERIVED
)
1206 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1210 else if (comp
->ts
.type
== BT_DERIVED
)
1212 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1216 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1217 && derived
->attr
.pdt_template
)
1219 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1228 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1229 static bool resolve_fl_struct (gfc_symbol
*sym
);
1232 /* Resolve all of the elements of a structure constructor and make sure that
1233 the types are correct. The 'init' flag indicates that the given
1234 constructor is an initializer. */
1237 resolve_structure_cons (gfc_expr
*expr
, int init
)
1239 gfc_constructor
*cons
;
1240 gfc_component
*comp
;
1246 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1248 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1249 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1251 resolve_fl_struct (expr
->ts
.u
.derived
);
1253 /* If this is a Parameterized Derived Type template, find the
1254 instance corresponding to the PDT kind parameters. */
1255 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1258 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1261 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1263 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1266 gfc_free_actual_arglist (param_list
);
1268 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1273 cons
= gfc_constructor_first (expr
->value
.constructor
);
1275 /* A constructor may have references if it is the result of substituting a
1276 parameter variable. In this case we just pull out the component we
1279 comp
= expr
->ref
->u
.c
.sym
->components
;
1281 comp
= expr
->ts
.u
.derived
->components
;
1283 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1290 /* Unions use an EXPR_NULL contrived expression to tell the translation
1291 phase to generate an initializer of the appropriate length.
1293 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1296 if (!gfc_resolve_expr (cons
->expr
))
1302 rank
= comp
->as
? comp
->as
->rank
: 0;
1303 if (comp
->ts
.type
== BT_CLASS
1304 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1305 && CLASS_DATA (comp
)->as
)
1306 rank
= CLASS_DATA (comp
)->as
->rank
;
1308 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1309 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1311 gfc_error ("The rank of the element in the structure "
1312 "constructor at %L does not match that of the "
1313 "component (%d/%d)", &cons
->expr
->where
,
1314 cons
->expr
->rank
, rank
);
1318 /* If we don't have the right type, try to convert it. */
1320 if (!comp
->attr
.proc_pointer
&&
1321 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1323 if (strcmp (comp
->name
, "_extends") == 0)
1325 /* Can afford to be brutal with the _extends initializer.
1326 The derived type can get lost because it is PRIVATE
1327 but it is not usage constrained by the standard. */
1328 cons
->expr
->ts
= comp
->ts
;
1330 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs, is %s but should be %s",
1334 &cons
->expr
->where
, comp
->name
,
1335 gfc_basic_typename (cons
->expr
->ts
.type
),
1336 gfc_basic_typename (comp
->ts
.type
));
1341 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1347 /* For strings, the length of the constructor should be the same as
1348 the one of the structure, ensure this if the lengths are known at
1349 compile time and when we are dealing with PARAMETER or structure
1351 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1352 && comp
->ts
.u
.cl
->length
1353 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1354 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1355 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1356 && cons
->expr
->rank
!= 0
1357 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1358 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1360 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1361 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1363 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1364 to make use of the gfc_resolve_character_array_constructor
1365 machinery. The expression is later simplified away to
1366 an array of string literals. */
1367 gfc_expr
*para
= cons
->expr
;
1368 cons
->expr
= gfc_get_expr ();
1369 cons
->expr
->ts
= para
->ts
;
1370 cons
->expr
->where
= para
->where
;
1371 cons
->expr
->expr_type
= EXPR_ARRAY
;
1372 cons
->expr
->rank
= para
->rank
;
1373 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1374 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1375 para
, &cons
->expr
->where
);
1378 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1380 /* Rely on the cleanup of the namespace to deal correctly with
1381 the old charlen. (There was a block here that attempted to
1382 remove the charlen but broke the chain in so doing.) */
1383 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1384 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1385 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1386 gfc_resolve_character_array_constructor (cons
->expr
);
1390 if (cons
->expr
->expr_type
== EXPR_NULL
1391 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1392 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1393 || (comp
->ts
.type
== BT_CLASS
1394 && (CLASS_DATA (comp
)->attr
.class_pointer
1395 || CLASS_DATA (comp
)->attr
.allocatable
))))
1398 gfc_error ("The NULL in the structure constructor at %L is "
1399 "being applied to component %qs, which is neither "
1400 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1404 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1406 /* Check procedure pointer interface. */
1407 gfc_symbol
*s2
= NULL
;
1412 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1415 s2
= c2
->ts
.interface
;
1418 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1420 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1421 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1423 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1425 s2
= cons
->expr
->symtree
->n
.sym
;
1426 name
= cons
->expr
->symtree
->n
.sym
->name
;
1429 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1430 err
, sizeof (err
), NULL
, NULL
))
1432 gfc_error_opt (0, "Interface mismatch for procedure-pointer "
1433 "component %qs in structure constructor at %L:"
1434 " %s", comp
->name
, &cons
->expr
->where
, err
);
1439 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1440 || cons
->expr
->expr_type
== EXPR_NULL
)
1443 a
= gfc_expr_attr (cons
->expr
);
1445 if (!a
.pointer
&& !a
.target
)
1448 gfc_error ("The element in the structure constructor at %L, "
1449 "for pointer component %qs should be a POINTER or "
1450 "a TARGET", &cons
->expr
->where
, comp
->name
);
1455 /* F08:C461. Additional checks for pointer initialization. */
1459 gfc_error ("Pointer initialization target at %L "
1460 "must not be ALLOCATABLE", &cons
->expr
->where
);
1465 gfc_error ("Pointer initialization target at %L "
1466 "must have the SAVE attribute", &cons
->expr
->where
);
1470 /* F2003, C1272 (3). */
1471 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1472 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1473 || gfc_is_coindexed (cons
->expr
));
1474 if (impure
&& gfc_pure (NULL
))
1477 gfc_error ("Invalid expression in the structure constructor for "
1478 "pointer component %qs at %L in PURE procedure",
1479 comp
->name
, &cons
->expr
->where
);
1483 gfc_unset_implicit_pure (NULL
);
1490 /****************** Expression name resolution ******************/
1492 /* Returns 0 if a symbol was not declared with a type or
1493 attribute declaration statement, nonzero otherwise. */
1496 was_declared (gfc_symbol
*sym
)
1502 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1505 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1506 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1507 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1508 || a
.asynchronous
|| a
.codimension
)
1515 /* Determine if a symbol is generic or not. */
1518 generic_sym (gfc_symbol
*sym
)
1522 if (sym
->attr
.generic
||
1523 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1526 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1529 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1536 return generic_sym (s
);
1543 /* Determine if a symbol is specific or not. */
1546 specific_sym (gfc_symbol
*sym
)
1550 if (sym
->attr
.if_source
== IFSRC_IFBODY
1551 || sym
->attr
.proc
== PROC_MODULE
1552 || sym
->attr
.proc
== PROC_INTERNAL
1553 || sym
->attr
.proc
== PROC_ST_FUNCTION
1554 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1555 || sym
->attr
.external
)
1558 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1561 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1563 return (s
== NULL
) ? 0 : specific_sym (s
);
1567 /* Figure out if the procedure is specific, generic or unknown. */
1570 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1573 procedure_kind (gfc_symbol
*sym
)
1575 if (generic_sym (sym
))
1576 return PTYPE_GENERIC
;
1578 if (specific_sym (sym
))
1579 return PTYPE_SPECIFIC
;
1581 return PTYPE_UNKNOWN
;
1584 /* Check references to assumed size arrays. The flag need_full_assumed_size
1585 is nonzero when matching actual arguments. */
1587 static int need_full_assumed_size
= 0;
1590 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1592 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1595 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1596 What should it be? */
1597 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1598 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1599 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1601 gfc_error ("The upper bound in the last dimension must "
1602 "appear in the reference to the assumed size "
1603 "array %qs at %L", sym
->name
, &e
->where
);
1610 /* Look for bad assumed size array references in argument expressions
1611 of elemental and array valued intrinsic procedures. Since this is
1612 called from procedure resolution functions, it only recurses at
1616 resolve_assumed_size_actual (gfc_expr
*e
)
1621 switch (e
->expr_type
)
1624 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1629 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1630 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1641 /* Check a generic procedure, passed as an actual argument, to see if
1642 there is a matching specific name. If none, it is an error, and if
1643 more than one, the reference is ambiguous. */
1645 count_specific_procs (gfc_expr
*e
)
1652 sym
= e
->symtree
->n
.sym
;
1654 for (p
= sym
->generic
; p
; p
= p
->next
)
1655 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1657 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1663 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1667 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1668 "argument at %L", sym
->name
, &e
->where
);
1674 /* See if a call to sym could possibly be a not allowed RECURSION because of
1675 a missing RECURSIVE declaration. This means that either sym is the current
1676 context itself, or sym is the parent of a contained procedure calling its
1677 non-RECURSIVE containing procedure.
1678 This also works if sym is an ENTRY. */
1681 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1683 gfc_symbol
* proc_sym
;
1684 gfc_symbol
* context_proc
;
1685 gfc_namespace
* real_context
;
1687 if (sym
->attr
.flavor
== FL_PROGRAM
1688 || gfc_fl_struct (sym
->attr
.flavor
))
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Check that name is not a derived type. */
1870 is_dt_name (const char *name
)
1872 gfc_symbol
*dt_list
, *dt_first
;
1874 dt_list
= dt_first
= gfc_derived_types
;
1875 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1877 if (strcmp(dt_list
->name
, name
) == 0)
1879 if (dt_first
== dt_list
->dt_next
)
1886 /* Resolve an actual argument list. Most of the time, this is just
1887 resolving the expressions in the list.
1888 The exception is that we sometimes have to decide whether arguments
1889 that look like procedure arguments are really simple variable
1893 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1894 bool no_formal_args
)
1897 gfc_symtree
*parent_st
;
1899 gfc_component
*comp
;
1900 int save_need_full_assumed_size
;
1901 bool return_value
= false;
1902 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1905 first_actual_arg
= true;
1907 for (; arg
; arg
= arg
->next
)
1912 /* Check the label is a valid branching target. */
1915 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1917 gfc_error ("Label %d referenced at %L is never defined",
1918 arg
->label
->value
, &arg
->label
->where
);
1922 first_actual_arg
= false;
1926 if (e
->expr_type
== EXPR_VARIABLE
1927 && e
->symtree
->n
.sym
->attr
.generic
1929 && count_specific_procs (e
) != 1)
1932 if (e
->ts
.type
!= BT_PROCEDURE
)
1934 save_need_full_assumed_size
= need_full_assumed_size
;
1935 if (e
->expr_type
!= EXPR_VARIABLE
)
1936 need_full_assumed_size
= 0;
1937 if (!gfc_resolve_expr (e
))
1939 need_full_assumed_size
= save_need_full_assumed_size
;
1943 /* See if the expression node should really be a variable reference. */
1945 sym
= e
->symtree
->n
.sym
;
1947 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1949 gfc_error ("Derived type %qs is used as an actual "
1950 "argument at %L", sym
->name
, &e
->where
);
1954 if (sym
->attr
.flavor
== FL_PROCEDURE
1955 || sym
->attr
.intrinsic
1956 || sym
->attr
.external
)
1960 /* If a procedure is not already determined to be something else
1961 check if it is intrinsic. */
1962 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1963 sym
->attr
.intrinsic
= 1;
1965 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1967 gfc_error ("Statement function %qs at %L is not allowed as an "
1968 "actual argument", sym
->name
, &e
->where
);
1971 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1972 sym
->attr
.subroutine
);
1973 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1975 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1976 "actual argument", sym
->name
, &e
->where
);
1979 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1980 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1982 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1983 " used as actual argument at %L",
1984 sym
->name
, &e
->where
))
1988 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1990 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1991 "allowed as an actual argument at %L", sym
->name
,
1995 /* Check if a generic interface has a specific procedure
1996 with the same name before emitting an error. */
1997 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2000 /* Just in case a specific was found for the expression. */
2001 sym
= e
->symtree
->n
.sym
;
2003 /* If the symbol is the function that names the current (or
2004 parent) scope, then we really have a variable reference. */
2006 if (gfc_is_function_return_value (sym
, sym
->ns
))
2009 /* If all else fails, see if we have a specific intrinsic. */
2010 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2012 gfc_intrinsic_sym
*isym
;
2014 isym
= gfc_find_function (sym
->name
);
2015 if (isym
== NULL
|| !isym
->specific
)
2017 gfc_error ("Unable to find a specific INTRINSIC procedure "
2018 "for the reference %qs at %L", sym
->name
,
2023 sym
->attr
.intrinsic
= 1;
2024 sym
->attr
.function
= 1;
2027 if (!gfc_resolve_expr (e
))
2032 /* See if the name is a module procedure in a parent unit. */
2034 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2037 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2039 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2043 if (parent_st
== NULL
)
2046 sym
= parent_st
->n
.sym
;
2047 e
->symtree
= parent_st
; /* Point to the right thing. */
2049 if (sym
->attr
.flavor
== FL_PROCEDURE
2050 || sym
->attr
.intrinsic
2051 || sym
->attr
.external
)
2053 if (!gfc_resolve_expr (e
))
2059 e
->expr_type
= EXPR_VARIABLE
;
2061 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2062 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2063 && CLASS_DATA (sym
)->as
))
2065 e
->rank
= sym
->ts
.type
== BT_CLASS
2066 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2067 e
->ref
= gfc_get_ref ();
2068 e
->ref
->type
= REF_ARRAY
;
2069 e
->ref
->u
.ar
.type
= AR_FULL
;
2070 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2071 ? CLASS_DATA (sym
)->as
: sym
->as
;
2074 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2075 primary.c (match_actual_arg). If above code determines that it
2076 is a variable instead, it needs to be resolved as it was not
2077 done at the beginning of this function. */
2078 save_need_full_assumed_size
= need_full_assumed_size
;
2079 if (e
->expr_type
!= EXPR_VARIABLE
)
2080 need_full_assumed_size
= 0;
2081 if (!gfc_resolve_expr (e
))
2083 need_full_assumed_size
= save_need_full_assumed_size
;
2086 /* Check argument list functions %VAL, %LOC and %REF. There is
2087 nothing to do for %REF. */
2088 if (arg
->name
&& arg
->name
[0] == '%')
2090 if (strcmp ("%VAL", arg
->name
) == 0)
2092 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2094 gfc_error ("By-value argument at %L is not of numeric "
2101 gfc_error ("By-value argument at %L cannot be an array or "
2102 "an array section", &e
->where
);
2106 /* Intrinsics are still PROC_UNKNOWN here. However,
2107 since same file external procedures are not resolvable
2108 in gfortran, it is a good deal easier to leave them to
2110 if (ptype
!= PROC_UNKNOWN
2111 && ptype
!= PROC_DUMMY
2112 && ptype
!= PROC_EXTERNAL
2113 && ptype
!= PROC_MODULE
)
2115 gfc_error ("By-value argument at %L is not allowed "
2116 "in this context", &e
->where
);
2121 /* Statement functions have already been excluded above. */
2122 else if (strcmp ("%LOC", arg
->name
) == 0
2123 && e
->ts
.type
== BT_PROCEDURE
)
2125 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2127 gfc_error ("Passing internal procedure at %L by location "
2128 "not allowed", &e
->where
);
2134 comp
= gfc_get_proc_ptr_comp(e
);
2135 if (e
->expr_type
== EXPR_VARIABLE
2136 && comp
&& comp
->attr
.elemental
)
2138 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2139 "allowed as an actual argument at %L", comp
->name
,
2143 /* Fortran 2008, C1237. */
2144 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2145 && gfc_has_ultimate_pointer (e
))
2147 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2148 "component", &e
->where
);
2152 first_actual_arg
= false;
2155 return_value
= true;
2158 actual_arg
= actual_arg_sav
;
2159 first_actual_arg
= first_actual_arg_sav
;
2161 return return_value
;
2165 /* Do the checks of the actual argument list that are specific to elemental
2166 procedures. If called with c == NULL, we have a function, otherwise if
2167 expr == NULL, we have a subroutine. */
2170 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2172 gfc_actual_arglist
*arg0
;
2173 gfc_actual_arglist
*arg
;
2174 gfc_symbol
*esym
= NULL
;
2175 gfc_intrinsic_sym
*isym
= NULL
;
2177 gfc_intrinsic_arg
*iformal
= NULL
;
2178 gfc_formal_arglist
*eformal
= NULL
;
2179 bool formal_optional
= false;
2180 bool set_by_optional
= false;
2184 /* Is this an elemental procedure? */
2185 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2187 if (expr
->value
.function
.esym
!= NULL
2188 && expr
->value
.function
.esym
->attr
.elemental
)
2190 arg0
= expr
->value
.function
.actual
;
2191 esym
= expr
->value
.function
.esym
;
2193 else if (expr
->value
.function
.isym
!= NULL
2194 && expr
->value
.function
.isym
->elemental
)
2196 arg0
= expr
->value
.function
.actual
;
2197 isym
= expr
->value
.function
.isym
;
2202 else if (c
&& c
->ext
.actual
!= NULL
)
2204 arg0
= c
->ext
.actual
;
2206 if (c
->resolved_sym
)
2207 esym
= c
->resolved_sym
;
2209 esym
= c
->symtree
->n
.sym
;
2212 if (!esym
->attr
.elemental
)
2218 /* The rank of an elemental is the rank of its array argument(s). */
2219 for (arg
= arg0
; arg
; arg
= arg
->next
)
2221 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2223 rank
= arg
->expr
->rank
;
2224 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2225 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2226 set_by_optional
= true;
2228 /* Function specific; set the result rank and shape. */
2232 if (!expr
->shape
&& arg
->expr
->shape
)
2234 expr
->shape
= gfc_get_shape (rank
);
2235 for (i
= 0; i
< rank
; i
++)
2236 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2243 /* If it is an array, it shall not be supplied as an actual argument
2244 to an elemental procedure unless an array of the same rank is supplied
2245 as an actual argument corresponding to a nonoptional dummy argument of
2246 that elemental procedure(12.4.1.5). */
2247 formal_optional
= false;
2249 iformal
= isym
->formal
;
2251 eformal
= esym
->formal
;
2253 for (arg
= arg0
; arg
; arg
= arg
->next
)
2257 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2258 formal_optional
= true;
2259 eformal
= eformal
->next
;
2261 else if (isym
&& iformal
)
2263 if (iformal
->optional
)
2264 formal_optional
= true;
2265 iformal
= iformal
->next
;
2268 formal_optional
= true;
2270 if (pedantic
&& arg
->expr
!= NULL
2271 && arg
->expr
->expr_type
== EXPR_VARIABLE
2272 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2275 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2276 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2278 gfc_warning (OPT_Wpedantic
,
2279 "%qs at %L is an array and OPTIONAL; IF IT IS "
2280 "MISSING, it cannot be the actual argument of an "
2281 "ELEMENTAL procedure unless there is a non-optional "
2282 "argument with the same rank (12.4.1.5)",
2283 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2287 for (arg
= arg0
; arg
; arg
= arg
->next
)
2289 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2292 /* Being elemental, the last upper bound of an assumed size array
2293 argument must be present. */
2294 if (resolve_assumed_size_actual (arg
->expr
))
2297 /* Elemental procedure's array actual arguments must conform. */
2300 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2307 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2308 is an array, the intent inout/out variable needs to be also an array. */
2309 if (rank
> 0 && esym
&& expr
== NULL
)
2310 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2311 arg
= arg
->next
, eformal
= eformal
->next
)
2312 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2313 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2314 && arg
->expr
&& arg
->expr
->rank
== 0)
2316 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2317 "ELEMENTAL subroutine %qs is a scalar, but another "
2318 "actual argument is an array", &arg
->expr
->where
,
2319 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2320 : "INOUT", eformal
->sym
->name
, esym
->name
);
2327 /* This function does the checking of references to global procedures
2328 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2329 77 and 95 standards. It checks for a gsymbol for the name, making
2330 one if it does not already exist. If it already exists, then the
2331 reference being resolved must correspond to the type of gsymbol.
2332 Otherwise, the new symbol is equipped with the attributes of the
2333 reference. The corresponding code that is called in creating
2334 global entities is parse.c.
2336 In addition, for all but -std=legacy, the gsymbols are used to
2337 check the interfaces of external procedures from the same file.
2338 The namespace of the gsymbol is resolved and then, once this is
2339 done the interface is checked. */
2343 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2345 if (!gsym_ns
->proc_name
->attr
.recursive
)
2348 if (sym
->ns
== gsym_ns
)
2351 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2358 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2360 if (gsym_ns
->entries
)
2362 gfc_entry_list
*entry
= gsym_ns
->entries
;
2364 for (; entry
; entry
= entry
->next
)
2366 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2368 if (strcmp (gsym_ns
->proc_name
->name
,
2369 sym
->ns
->proc_name
->name
) == 0)
2373 && strcmp (gsym_ns
->proc_name
->name
,
2374 sym
->ns
->parent
->proc_name
->name
) == 0)
2383 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2386 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2388 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2390 for ( ; arg
; arg
= arg
->next
)
2395 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2397 strncpy (errmsg
, _("allocatable argument"), err_len
);
2400 else if (arg
->sym
->attr
.asynchronous
)
2402 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2405 else if (arg
->sym
->attr
.optional
)
2407 strncpy (errmsg
, _("optional argument"), err_len
);
2410 else if (arg
->sym
->attr
.pointer
)
2412 strncpy (errmsg
, _("pointer argument"), err_len
);
2415 else if (arg
->sym
->attr
.target
)
2417 strncpy (errmsg
, _("target argument"), err_len
);
2420 else if (arg
->sym
->attr
.value
)
2422 strncpy (errmsg
, _("value argument"), err_len
);
2425 else if (arg
->sym
->attr
.volatile_
)
2427 strncpy (errmsg
, _("volatile argument"), err_len
);
2430 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2432 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2435 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2437 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2440 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2442 strncpy (errmsg
, _("coarray argument"), err_len
);
2445 else if (false) /* (2d) TODO: parametrized derived type */
2447 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2450 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2452 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2455 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2457 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2460 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2462 /* As assumed-type is unlimited polymorphic (cf. above).
2463 See also TS 29113, Note 6.1. */
2464 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2469 if (sym
->attr
.function
)
2471 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2473 if (res
->attr
.dimension
) /* (3a) */
2475 strncpy (errmsg
, _("array result"), err_len
);
2478 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2480 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2483 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2484 && res
->ts
.u
.cl
->length
2485 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2487 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2492 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2494 strncpy (errmsg
, _("elemental procedure"), err_len
);
2497 else if (sym
->attr
.is_bind_c
) /* (5) */
2499 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2508 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2512 enum gfc_symbol_type type
;
2515 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2517 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2518 sym
->binding_label
!= NULL
);
2520 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2521 gfc_global_used (gsym
, where
);
2523 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2524 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2525 && gsym
->type
!= GSYM_UNKNOWN
2526 && !gsym
->binding_label
2528 && gsym
->ns
->proc_name
2529 && not_in_recursive (sym
, gsym
->ns
)
2530 && not_entry_self_reference (sym
, gsym
->ns
))
2532 gfc_symbol
*def_sym
;
2533 def_sym
= gsym
->ns
->proc_name
;
2535 if (gsym
->ns
->resolved
!= -1)
2538 /* Resolve the gsymbol namespace if needed. */
2539 if (!gsym
->ns
->resolved
)
2541 gfc_symbol
*old_dt_list
;
2543 /* Stash away derived types so that the backend_decls
2544 do not get mixed up. */
2545 old_dt_list
= gfc_derived_types
;
2546 gfc_derived_types
= NULL
;
2548 gfc_resolve (gsym
->ns
);
2550 /* Store the new derived types with the global namespace. */
2551 if (gfc_derived_types
)
2552 gsym
->ns
->derived_types
= gfc_derived_types
;
2554 /* Restore the derived types of this namespace. */
2555 gfc_derived_types
= old_dt_list
;
2558 /* Make sure that translation for the gsymbol occurs before
2559 the procedure currently being resolved. */
2560 ns
= gfc_global_ns_list
;
2561 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2563 if (ns
->sibling
== gsym
->ns
)
2565 ns
->sibling
= gsym
->ns
->sibling
;
2566 gsym
->ns
->sibling
= gfc_global_ns_list
;
2567 gfc_global_ns_list
= gsym
->ns
;
2572 /* This can happen if a binding name has been specified. */
2573 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2574 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2576 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2578 gfc_entry_list
*entry
;
2579 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2580 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2582 def_sym
= entry
->sym
;
2588 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2590 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2591 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2592 gfc_typename (&def_sym
->ts
));
2596 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2597 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2599 gfc_error ("Explicit interface required for %qs at %L: %s",
2600 sym
->name
, &sym
->declared_at
, reason
);
2604 bool bad_result_characteristics
;
2605 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2606 reason
, sizeof(reason
), NULL
, NULL
,
2607 &bad_result_characteristics
))
2609 /* Turn erros into warnings with -std=gnu and -std=legacy,
2610 unless a function returns a wrong type, which can lead
2611 to all kinds of ICEs and wrong code. */
2613 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
)
2614 && !bad_result_characteristics
)
2615 gfc_errors_to_warnings (true);
2617 gfc_error ("Interface mismatch in global procedure %qs at %L: %s",
2618 sym
->name
, &sym
->declared_at
, reason
);
2619 gfc_errors_to_warnings (false);
2626 if (gsym
->type
== GSYM_UNKNOWN
)
2629 gsym
->where
= *where
;
2636 /************* Function resolution *************/
2638 /* Resolve a function call known to be generic.
2639 Section 14.1.2.4.1. */
2642 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2646 if (sym
->attr
.generic
)
2648 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2651 expr
->value
.function
.name
= s
->name
;
2652 expr
->value
.function
.esym
= s
;
2654 if (s
->ts
.type
!= BT_UNKNOWN
)
2656 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2657 expr
->ts
= s
->result
->ts
;
2660 expr
->rank
= s
->as
->rank
;
2661 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2662 expr
->rank
= s
->result
->as
->rank
;
2664 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2669 /* TODO: Need to search for elemental references in generic
2673 if (sym
->attr
.intrinsic
)
2674 return gfc_intrinsic_func_interface (expr
, 0);
2681 resolve_generic_f (gfc_expr
*expr
)
2685 gfc_interface
*intr
= NULL
;
2687 sym
= expr
->symtree
->n
.sym
;
2691 m
= resolve_generic_f0 (expr
, sym
);
2694 else if (m
== MATCH_ERROR
)
2699 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2700 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2703 if (sym
->ns
->parent
== NULL
)
2705 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2709 if (!generic_sym (sym
))
2713 /* Last ditch attempt. See if the reference is to an intrinsic
2714 that possesses a matching interface. 14.1.2.4 */
2715 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2717 if (gfc_init_expr_flag
)
2718 gfc_error ("Function %qs in initialization expression at %L "
2719 "must be an intrinsic function",
2720 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2722 gfc_error ("There is no specific function for the generic %qs "
2723 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2729 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2732 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2734 return resolve_structure_cons (expr
, 0);
2737 m
= gfc_intrinsic_func_interface (expr
, 0);
2742 gfc_error ("Generic function %qs at %L is not consistent with a "
2743 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2750 /* Resolve a function call known to be specific. */
2753 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2757 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2759 if (sym
->attr
.dummy
)
2761 sym
->attr
.proc
= PROC_DUMMY
;
2765 sym
->attr
.proc
= PROC_EXTERNAL
;
2769 if (sym
->attr
.proc
== PROC_MODULE
2770 || sym
->attr
.proc
== PROC_ST_FUNCTION
2771 || sym
->attr
.proc
== PROC_INTERNAL
)
2774 if (sym
->attr
.intrinsic
)
2776 m
= gfc_intrinsic_func_interface (expr
, 1);
2780 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2781 "with an intrinsic", sym
->name
, &expr
->where
);
2789 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2792 expr
->ts
= sym
->result
->ts
;
2795 expr
->value
.function
.name
= sym
->name
;
2796 expr
->value
.function
.esym
= sym
;
2797 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2799 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2801 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2802 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2803 else if (sym
->as
!= NULL
)
2804 expr
->rank
= sym
->as
->rank
;
2811 resolve_specific_f (gfc_expr
*expr
)
2816 sym
= expr
->symtree
->n
.sym
;
2820 m
= resolve_specific_f0 (sym
, expr
);
2823 if (m
== MATCH_ERROR
)
2826 if (sym
->ns
->parent
== NULL
)
2829 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2835 gfc_error ("Unable to resolve the specific function %qs at %L",
2836 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2841 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2842 candidates in CANDIDATES_LEN. */
2845 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2847 size_t &candidates_len
)
2853 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2854 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2855 vec_push (candidates
, candidates_len
, sym
->name
);
2859 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2863 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2867 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2870 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2872 char **candidates
= NULL
;
2873 size_t candidates_len
= 0;
2874 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2875 return gfc_closest_fuzzy_match (fn
, candidates
);
2879 /* Resolve a procedure call not known to be generic nor specific. */
2882 resolve_unknown_f (gfc_expr
*expr
)
2887 sym
= expr
->symtree
->n
.sym
;
2889 if (sym
->attr
.dummy
)
2891 sym
->attr
.proc
= PROC_DUMMY
;
2892 expr
->value
.function
.name
= sym
->name
;
2896 /* See if we have an intrinsic function reference. */
2898 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2900 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2905 /* The reference is to an external name. */
2907 sym
->attr
.proc
= PROC_EXTERNAL
;
2908 expr
->value
.function
.name
= sym
->name
;
2909 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2911 if (sym
->as
!= NULL
)
2912 expr
->rank
= sym
->as
->rank
;
2914 /* Type of the expression is either the type of the symbol or the
2915 default type of the symbol. */
2918 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2920 if (sym
->ts
.type
!= BT_UNKNOWN
)
2924 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2926 if (ts
->type
== BT_UNKNOWN
)
2929 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2931 gfc_error ("Function %qs at %L has no IMPLICIT type"
2932 "; did you mean %qs?",
2933 sym
->name
, &expr
->where
, guessed
);
2935 gfc_error ("Function %qs at %L has no IMPLICIT type",
2936 sym
->name
, &expr
->where
);
2947 /* Return true, if the symbol is an external procedure. */
2949 is_external_proc (gfc_symbol
*sym
)
2951 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2952 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2953 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2954 && !sym
->attr
.proc_pointer
2955 && !sym
->attr
.use_assoc
2963 /* Figure out if a function reference is pure or not. Also set the name
2964 of the function for a potential error message. Return nonzero if the
2965 function is PURE, zero if not. */
2967 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2970 gfc_pure_function (gfc_expr
*e
, const char **name
)
2973 gfc_component
*comp
;
2977 if (e
->symtree
!= NULL
2978 && e
->symtree
->n
.sym
!= NULL
2979 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2980 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2982 comp
= gfc_get_proc_ptr_comp (e
);
2985 pure
= gfc_pure (comp
->ts
.interface
);
2988 else if (e
->value
.function
.esym
)
2990 pure
= gfc_pure (e
->value
.function
.esym
);
2991 *name
= e
->value
.function
.esym
->name
;
2993 else if (e
->value
.function
.isym
)
2995 pure
= e
->value
.function
.isym
->pure
2996 || e
->value
.function
.isym
->elemental
;
2997 *name
= e
->value
.function
.isym
->name
;
3001 /* Implicit functions are not pure. */
3003 *name
= e
->value
.function
.name
;
3010 /* Check if the expression is a reference to an implicitly pure function. */
3013 gfc_implicit_pure_function (gfc_expr
*e
)
3015 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3017 return gfc_implicit_pure (comp
->ts
.interface
);
3018 else if (e
->value
.function
.esym
)
3019 return gfc_implicit_pure (e
->value
.function
.esym
);
3026 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3027 int *f ATTRIBUTE_UNUSED
)
3031 /* Don't bother recursing into other statement functions
3032 since they will be checked individually for purity. */
3033 if (e
->expr_type
!= EXPR_FUNCTION
3035 || e
->symtree
->n
.sym
== sym
3036 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3039 return gfc_pure_function (e
, &name
) ? false : true;
3044 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3046 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3050 /* Check if an impure function is allowed in the current context. */
3052 static bool check_pure_function (gfc_expr
*e
)
3054 const char *name
= NULL
;
3055 if (!gfc_pure_function (e
, &name
) && name
)
3059 gfc_error ("Reference to impure function %qs at %L inside a "
3060 "FORALL %s", name
, &e
->where
,
3061 forall_flag
== 2 ? "mask" : "block");
3064 else if (gfc_do_concurrent_flag
)
3066 gfc_error ("Reference to impure function %qs at %L inside a "
3067 "DO CONCURRENT %s", name
, &e
->where
,
3068 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3071 else if (gfc_pure (NULL
))
3073 gfc_error ("Reference to impure function %qs at %L "
3074 "within a PURE procedure", name
, &e
->where
);
3077 if (!gfc_implicit_pure_function (e
))
3078 gfc_unset_implicit_pure (NULL
);
3084 /* Update current procedure's array_outer_dependency flag, considering
3085 a call to procedure SYM. */
3088 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3090 /* Check to see if this is a sibling function that has not yet
3092 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3093 for (; sibling
; sibling
= sibling
->sibling
)
3095 if (sibling
->proc_name
== sym
)
3097 gfc_resolve (sibling
);
3102 /* If SYM has references to outer arrays, so has the procedure calling
3103 SYM. If SYM is a procedure pointer, we can assume the worst. */
3104 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3105 && gfc_current_ns
->proc_name
)
3106 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3110 /* Resolve a function call, which means resolving the arguments, then figuring
3111 out which entity the name refers to. */
3114 resolve_function (gfc_expr
*expr
)
3116 gfc_actual_arglist
*arg
;
3120 procedure_type p
= PROC_INTRINSIC
;
3121 bool no_formal_args
;
3125 sym
= expr
->symtree
->n
.sym
;
3127 /* If this is a procedure pointer component, it has already been resolved. */
3128 if (gfc_is_proc_ptr_comp (expr
))
3131 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3133 if (sym
&& sym
->attr
.intrinsic
3134 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3135 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3140 gfc_error ("Unexpected junk after %qs at %L", expr
->symtree
->n
.sym
->name
,
3145 if (sym
&& sym
->attr
.intrinsic
3146 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3149 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3151 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3155 /* If this is a deferred TBP with an abstract interface (which may
3156 of course be referenced), expr->value.function.esym will be set. */
3157 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3159 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3160 sym
->name
, &expr
->where
);
3164 /* If this is a deferred TBP with an abstract interface, its result
3165 cannot be an assumed length character (F2003: C418). */
3166 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3167 && sym
->result
->ts
.u
.cl
3168 && sym
->result
->ts
.u
.cl
->length
== NULL
3169 && !sym
->result
->ts
.deferred
)
3171 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3172 "character length result (F2008: C418)", sym
->name
,
3177 /* Switch off assumed size checking and do this again for certain kinds
3178 of procedure, once the procedure itself is resolved. */
3179 need_full_assumed_size
++;
3181 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3182 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3184 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3185 inquiry_argument
= true;
3186 no_formal_args
= sym
&& is_external_proc (sym
)
3187 && gfc_sym_get_dummy_args (sym
) == NULL
;
3189 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3192 inquiry_argument
= false;
3196 inquiry_argument
= false;
3198 /* Resume assumed_size checking. */
3199 need_full_assumed_size
--;
3201 /* If the procedure is external, check for usage. */
3202 if (sym
&& is_external_proc (sym
))
3203 resolve_global_procedure (sym
, &expr
->where
, 0);
3205 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3207 && sym
->ts
.u
.cl
->length
== NULL
3209 && !sym
->ts
.deferred
3210 && expr
->value
.function
.esym
== NULL
3211 && !sym
->attr
.contained
)
3213 /* Internal procedures are taken care of in resolve_contained_fntype. */
3214 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3215 "be used at %L since it is not a dummy argument",
3216 sym
->name
, &expr
->where
);
3220 /* See if function is already resolved. */
3222 if (expr
->value
.function
.name
!= NULL
3223 || expr
->value
.function
.isym
!= NULL
)
3225 if (expr
->ts
.type
== BT_UNKNOWN
)
3231 /* Apply the rules of section 14.1.2. */
3233 switch (procedure_kind (sym
))
3236 t
= resolve_generic_f (expr
);
3239 case PTYPE_SPECIFIC
:
3240 t
= resolve_specific_f (expr
);
3244 t
= resolve_unknown_f (expr
);
3248 gfc_internal_error ("resolve_function(): bad function type");
3252 /* If the expression is still a function (it might have simplified),
3253 then we check to see if we are calling an elemental function. */
3255 if (expr
->expr_type
!= EXPR_FUNCTION
)
3258 /* Walk the argument list looking for invalid BOZ. */
3259 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3260 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3262 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3263 "actual argument in a function reference",
3268 temp
= need_full_assumed_size
;
3269 need_full_assumed_size
= 0;
3271 if (!resolve_elemental_actual (expr
, NULL
))
3274 if (omp_workshare_flag
3275 && expr
->value
.function
.esym
3276 && ! gfc_elemental (expr
->value
.function
.esym
))
3278 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3279 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3284 #define GENERIC_ID expr->value.function.isym->id
3285 else if (expr
->value
.function
.actual
!= NULL
3286 && expr
->value
.function
.isym
!= NULL
3287 && GENERIC_ID
!= GFC_ISYM_LBOUND
3288 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3289 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3290 && GENERIC_ID
!= GFC_ISYM_LEN
3291 && GENERIC_ID
!= GFC_ISYM_LOC
3292 && GENERIC_ID
!= GFC_ISYM_C_LOC
3293 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3295 /* Array intrinsics must also have the last upper bound of an
3296 assumed size array argument. UBOUND and SIZE have to be
3297 excluded from the check if the second argument is anything
3300 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3302 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3303 && arg
== expr
->value
.function
.actual
3304 && arg
->next
!= NULL
&& arg
->next
->expr
)
3306 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3309 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3312 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3317 if (arg
->expr
!= NULL
3318 && arg
->expr
->rank
> 0
3319 && resolve_assumed_size_actual (arg
->expr
))
3325 need_full_assumed_size
= temp
;
3327 if (!check_pure_function(expr
))
3330 /* Functions without the RECURSIVE attribution are not allowed to
3331 * call themselves. */
3332 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3335 esym
= expr
->value
.function
.esym
;
3337 if (is_illegal_recursion (esym
, gfc_current_ns
))
3339 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3340 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3341 " function %qs is not RECURSIVE",
3342 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3344 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3345 " is not RECURSIVE", esym
->name
, &expr
->where
);
3351 /* Character lengths of use associated functions may contains references to
3352 symbols not referenced from the current program unit otherwise. Make sure
3353 those symbols are marked as referenced. */
3355 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3356 && expr
->value
.function
.esym
->attr
.use_assoc
)
3358 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3361 /* Make sure that the expression has a typespec that works. */
3362 if (expr
->ts
.type
== BT_UNKNOWN
)
3364 if (expr
->symtree
->n
.sym
->result
3365 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3366 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3367 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3370 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3372 if (expr
->value
.function
.esym
)
3373 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3375 update_current_proc_array_outer_dependency (sym
);
3378 /* typebound procedure: Assume the worst. */
3379 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3385 /************* Subroutine resolution *************/
3388 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3395 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3399 else if (gfc_do_concurrent_flag
)
3401 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3405 else if (gfc_pure (NULL
))
3407 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3411 gfc_unset_implicit_pure (NULL
);
3417 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3421 if (sym
->attr
.generic
)
3423 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3426 c
->resolved_sym
= s
;
3427 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3432 /* TODO: Need to search for elemental references in generic interface. */
3435 if (sym
->attr
.intrinsic
)
3436 return gfc_intrinsic_sub_interface (c
, 0);
3443 resolve_generic_s (gfc_code
*c
)
3448 sym
= c
->symtree
->n
.sym
;
3452 m
= resolve_generic_s0 (c
, sym
);
3455 else if (m
== MATCH_ERROR
)
3459 if (sym
->ns
->parent
== NULL
)
3461 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3465 if (!generic_sym (sym
))
3469 /* Last ditch attempt. See if the reference is to an intrinsic
3470 that possesses a matching interface. 14.1.2.4 */
3471 sym
= c
->symtree
->n
.sym
;
3473 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3475 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3476 sym
->name
, &c
->loc
);
3480 m
= gfc_intrinsic_sub_interface (c
, 0);
3484 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3485 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3491 /* Resolve a subroutine call known to be specific. */
3494 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3498 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3500 if (sym
->attr
.dummy
)
3502 sym
->attr
.proc
= PROC_DUMMY
;
3506 sym
->attr
.proc
= PROC_EXTERNAL
;
3510 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3513 if (sym
->attr
.intrinsic
)
3515 m
= gfc_intrinsic_sub_interface (c
, 1);
3519 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3520 "with an intrinsic", sym
->name
, &c
->loc
);
3528 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3530 c
->resolved_sym
= sym
;
3531 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3539 resolve_specific_s (gfc_code
*c
)
3544 sym
= c
->symtree
->n
.sym
;
3548 m
= resolve_specific_s0 (c
, sym
);
3551 if (m
== MATCH_ERROR
)
3554 if (sym
->ns
->parent
== NULL
)
3557 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3563 sym
= c
->symtree
->n
.sym
;
3564 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3565 sym
->name
, &c
->loc
);
3571 /* Resolve a subroutine call not known to be generic nor specific. */
3574 resolve_unknown_s (gfc_code
*c
)
3578 sym
= c
->symtree
->n
.sym
;
3580 if (sym
->attr
.dummy
)
3582 sym
->attr
.proc
= PROC_DUMMY
;
3586 /* See if we have an intrinsic function reference. */
3588 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3590 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3595 /* The reference is to an external name. */
3598 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3600 c
->resolved_sym
= sym
;
3602 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3606 /* Resolve a subroutine call. Although it was tempting to use the same code
3607 for functions, subroutines and functions are stored differently and this
3608 makes things awkward. */
3611 resolve_call (gfc_code
*c
)
3614 procedure_type ptype
= PROC_INTRINSIC
;
3615 gfc_symbol
*csym
, *sym
;
3616 bool no_formal_args
;
3618 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3620 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3622 gfc_error ("%qs at %L has a type, which is not consistent with "
3623 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3627 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3630 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3631 sym
= st
? st
->n
.sym
: NULL
;
3632 if (sym
&& csym
!= sym
3633 && sym
->ns
== gfc_current_ns
3634 && sym
->attr
.flavor
== FL_PROCEDURE
3635 && sym
->attr
.contained
)
3638 if (csym
->attr
.generic
)
3639 c
->symtree
->n
.sym
= sym
;
3642 csym
= c
->symtree
->n
.sym
;
3646 /* If this ia a deferred TBP, c->expr1 will be set. */
3647 if (!c
->expr1
&& csym
)
3649 if (csym
->attr
.abstract
)
3651 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3652 csym
->name
, &c
->loc
);
3656 /* Subroutines without the RECURSIVE attribution are not allowed to
3658 if (is_illegal_recursion (csym
, gfc_current_ns
))
3660 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3661 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3662 "as subroutine %qs is not RECURSIVE",
3663 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3665 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3666 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3672 /* Switch off assumed size checking and do this again for certain kinds
3673 of procedure, once the procedure itself is resolved. */
3674 need_full_assumed_size
++;
3677 ptype
= csym
->attr
.proc
;
3679 no_formal_args
= csym
&& is_external_proc (csym
)
3680 && gfc_sym_get_dummy_args (csym
) == NULL
;
3681 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3684 /* Resume assumed_size checking. */
3685 need_full_assumed_size
--;
3687 /* If external, check for usage. */
3688 if (csym
&& is_external_proc (csym
))
3689 resolve_global_procedure (csym
, &c
->loc
, 1);
3692 if (c
->resolved_sym
== NULL
)
3694 c
->resolved_isym
= NULL
;
3695 switch (procedure_kind (csym
))
3698 t
= resolve_generic_s (c
);
3701 case PTYPE_SPECIFIC
:
3702 t
= resolve_specific_s (c
);
3706 t
= resolve_unknown_s (c
);
3710 gfc_internal_error ("resolve_subroutine(): bad function type");
3714 /* Some checks of elemental subroutine actual arguments. */
3715 if (!resolve_elemental_actual (NULL
, c
))
3719 update_current_proc_array_outer_dependency (csym
);
3721 /* Typebound procedure: Assume the worst. */
3722 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3728 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3729 op1->shape and op2->shape are non-NULL return true if their shapes
3730 match. If both op1->shape and op2->shape are non-NULL return false
3731 if their shapes do not match. If either op1->shape or op2->shape is
3732 NULL, return true. */
3735 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3742 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3744 for (i
= 0; i
< op1
->rank
; i
++)
3746 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3748 gfc_error ("Shapes for operands at %L and %L are not conformable",
3749 &op1
->where
, &op2
->where
);
3759 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3760 For example A .AND. B becomes IAND(A, B). */
3762 logical_to_bitwise (gfc_expr
*e
)
3764 gfc_expr
*tmp
, *op1
, *op2
;
3766 gfc_actual_arglist
*args
= NULL
;
3768 gcc_assert (e
->expr_type
== EXPR_OP
);
3770 isym
= GFC_ISYM_NONE
;
3771 op1
= e
->value
.op
.op1
;
3772 op2
= e
->value
.op
.op2
;
3774 switch (e
->value
.op
.op
)
3777 isym
= GFC_ISYM_NOT
;
3780 isym
= GFC_ISYM_IAND
;
3783 isym
= GFC_ISYM_IOR
;
3785 case INTRINSIC_NEQV
:
3786 isym
= GFC_ISYM_IEOR
;
3789 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3790 Change the old expression to NEQV, which will get replaced by IEOR,
3791 and wrap it in NOT. */
3792 tmp
= gfc_copy_expr (e
);
3793 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3794 tmp
= logical_to_bitwise (tmp
);
3795 isym
= GFC_ISYM_NOT
;
3800 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3803 /* Inherit the original operation's operands as arguments. */
3804 args
= gfc_get_actual_arglist ();
3808 args
->next
= gfc_get_actual_arglist ();
3809 args
->next
->expr
= op2
;
3812 /* Convert the expression to a function call. */
3813 e
->expr_type
= EXPR_FUNCTION
;
3814 e
->value
.function
.actual
= args
;
3815 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3816 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3817 e
->value
.function
.esym
= NULL
;
3819 /* Make up a pre-resolved function call symtree if we need to. */
3820 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3823 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3824 sym
= e
->symtree
->n
.sym
;
3826 sym
->attr
.flavor
= FL_PROCEDURE
;
3827 sym
->attr
.function
= 1;
3828 sym
->attr
.elemental
= 1;
3830 sym
->attr
.referenced
= 1;
3831 gfc_intrinsic_symbol (sym
);
3832 gfc_commit_symbol (sym
);
3835 args
->name
= e
->value
.function
.isym
->formal
->name
;
3836 if (e
->value
.function
.isym
->formal
->next
)
3837 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3842 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3843 candidates in CANDIDATES_LEN. */
3845 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3847 size_t &candidates_len
)
3854 /* Not sure how to properly filter here. Use all for a start.
3855 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3856 these as i suppose they don't make terribly sense. */
3858 if (uop
->n
.uop
->op
!= NULL
)
3859 vec_push (candidates
, candidates_len
, uop
->name
);
3863 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3867 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3870 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3873 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3875 char **candidates
= NULL
;
3876 size_t candidates_len
= 0;
3877 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3878 return gfc_closest_fuzzy_match (op
, candidates
);
3882 /* Callback finding an impure function as an operand to an .and. or
3883 .or. expression. Remember the last function warned about to
3884 avoid double warnings when recursing. */
3887 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3892 static gfc_expr
*last
= NULL
;
3893 bool *found
= (bool *) data
;
3895 if (f
->expr_type
== EXPR_FUNCTION
)
3898 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3899 && !gfc_implicit_pure_function (f
))
3902 gfc_warning (OPT_Wfunction_elimination
,
3903 "Impure function %qs at %L might not be evaluated",
3906 gfc_warning (OPT_Wfunction_elimination
,
3907 "Impure function at %L might not be evaluated",
3916 /* Return true if TYPE is character based, false otherwise. */
3919 is_character_based (bt type
)
3921 return type
== BT_CHARACTER
|| type
== BT_HOLLERITH
;
3925 /* If expression is a hollerith, convert it to character and issue a warning
3926 for the conversion. */
3929 convert_hollerith_to_character (gfc_expr
*e
)
3931 if (e
->ts
.type
== BT_HOLLERITH
)
3935 t
.type
= BT_CHARACTER
;
3936 t
.kind
= e
->ts
.kind
;
3937 gfc_convert_type_warn (e
, &t
, 2, 1);
3941 /* Convert to numeric and issue a warning for the conversion. */
3944 convert_to_numeric (gfc_expr
*a
, gfc_expr
*b
)
3948 t
.type
= b
->ts
.type
;
3949 t
.kind
= b
->ts
.kind
;
3950 gfc_convert_type_warn (a
, &t
, 2, 1);
3953 /* Resolve an operator expression node. This can involve replacing the
3954 operation with a user defined function call. */
3957 resolve_operator (gfc_expr
*e
)
3959 gfc_expr
*op1
, *op2
;
3961 bool dual_locus_error
;
3964 /* Resolve all subnodes-- give them types. */
3966 switch (e
->value
.op
.op
)
3969 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3975 case INTRINSIC_UPLUS
:
3976 case INTRINSIC_UMINUS
:
3977 case INTRINSIC_PARENTHESES
:
3978 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3981 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3983 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3984 "unary operator %qs", &e
->value
.op
.op1
->where
,
3985 gfc_op2string (e
->value
.op
.op
));
3991 /* Typecheck the new node. */
3993 op1
= e
->value
.op
.op1
;
3994 op2
= e
->value
.op
.op2
;
3995 if (op1
== NULL
&& op2
== NULL
)
3998 dual_locus_error
= false;
4000 /* op1 and op2 cannot both be BOZ. */
4001 if (op1
&& op1
->ts
.type
== BT_BOZ
4002 && op2
&& op2
->ts
.type
== BT_BOZ
)
4004 gfc_error ("Operands at %L and %L cannot appear as operands of "
4005 "binary operator %qs", &op1
->where
, &op2
->where
,
4006 gfc_op2string (e
->value
.op
.op
));
4010 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
4011 || (op2
&& op2
->expr_type
== EXPR_NULL
))
4013 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
4017 switch (e
->value
.op
.op
)
4019 case INTRINSIC_UPLUS
:
4020 case INTRINSIC_UMINUS
:
4021 if (op1
->ts
.type
== BT_INTEGER
4022 || op1
->ts
.type
== BT_REAL
4023 || op1
->ts
.type
== BT_COMPLEX
)
4029 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
4030 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
4033 case INTRINSIC_PLUS
:
4034 case INTRINSIC_MINUS
:
4035 case INTRINSIC_TIMES
:
4036 case INTRINSIC_DIVIDE
:
4037 case INTRINSIC_POWER
:
4038 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4040 gfc_type_convert_binary (e
, 1);
4044 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
4046 _("Unexpected derived-type entities in binary intrinsic "
4047 "numeric operator %%<%s%%> at %%L"),
4048 gfc_op2string (e
->value
.op
.op
));
4051 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4052 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4053 gfc_typename (op2
));
4056 case INTRINSIC_CONCAT
:
4057 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4058 && op1
->ts
.kind
== op2
->ts
.kind
)
4060 e
->ts
.type
= BT_CHARACTER
;
4061 e
->ts
.kind
= op1
->ts
.kind
;
4066 _("Operands of string concatenation operator at %%L are %s/%s"),
4067 gfc_typename (op1
), gfc_typename (op2
));
4073 case INTRINSIC_NEQV
:
4074 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4076 e
->ts
.type
= BT_LOGICAL
;
4077 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4078 if (op1
->ts
.kind
< e
->ts
.kind
)
4079 gfc_convert_type (op1
, &e
->ts
, 2);
4080 else if (op2
->ts
.kind
< e
->ts
.kind
)
4081 gfc_convert_type (op2
, &e
->ts
, 2);
4083 if (flag_frontend_optimize
&&
4084 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4086 /* Warn about short-circuiting
4087 with impure function as second operand. */
4089 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4094 /* Logical ops on integers become bitwise ops with -fdec. */
4096 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4098 e
->ts
.type
= BT_INTEGER
;
4099 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4100 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4101 gfc_convert_type (op1
, &e
->ts
, 1);
4102 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4103 gfc_convert_type (op2
, &e
->ts
, 1);
4104 e
= logical_to_bitwise (e
);
4108 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4109 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4110 gfc_typename (op2
));
4115 /* Logical ops on integers become bitwise ops with -fdec. */
4116 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4118 e
->ts
.type
= BT_INTEGER
;
4119 e
->ts
.kind
= op1
->ts
.kind
;
4120 e
= logical_to_bitwise (e
);
4124 if (op1
->ts
.type
== BT_LOGICAL
)
4126 e
->ts
.type
= BT_LOGICAL
;
4127 e
->ts
.kind
= op1
->ts
.kind
;
4131 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4132 gfc_typename (op1
));
4136 case INTRINSIC_GT_OS
:
4138 case INTRINSIC_GE_OS
:
4140 case INTRINSIC_LT_OS
:
4142 case INTRINSIC_LE_OS
:
4143 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4145 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4152 case INTRINSIC_EQ_OS
:
4154 case INTRINSIC_NE_OS
:
4157 && is_character_based (op1
->ts
.type
)
4158 && is_character_based (op2
->ts
.type
))
4160 convert_hollerith_to_character (op1
);
4161 convert_hollerith_to_character (op2
);
4164 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4165 && op1
->ts
.kind
== op2
->ts
.kind
)
4167 e
->ts
.type
= BT_LOGICAL
;
4168 e
->ts
.kind
= gfc_default_logical_kind
;
4172 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4173 if (op1
->ts
.type
== BT_BOZ
)
4175 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4176 "an operand of a relational operator",
4180 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4183 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4187 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4188 if (op2
->ts
.type
== BT_BOZ
)
4190 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4191 "an operand of a relational operator",
4195 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4198 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4202 && op1
->ts
.type
== BT_HOLLERITH
&& gfc_numeric_ts (&op2
->ts
))
4203 convert_to_numeric (op1
, op2
);
4206 && gfc_numeric_ts (&op1
->ts
) && op2
->ts
.type
== BT_HOLLERITH
)
4207 convert_to_numeric (op2
, op1
);
4209 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4211 gfc_type_convert_binary (e
, 1);
4213 e
->ts
.type
= BT_LOGICAL
;
4214 e
->ts
.kind
= gfc_default_logical_kind
;
4216 if (warn_compare_reals
)
4218 gfc_intrinsic_op op
= e
->value
.op
.op
;
4220 /* Type conversion has made sure that the types of op1 and op2
4221 agree, so it is only necessary to check the first one. */
4222 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4223 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4224 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4228 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4229 msg
= "Equality comparison for %s at %L";
4231 msg
= "Inequality comparison for %s at %L";
4233 gfc_warning (OPT_Wcompare_reals
, msg
,
4234 gfc_typename (op1
), &op1
->where
);
4241 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4243 _("Logicals at %%L must be compared with %s instead of %s"),
4244 (e
->value
.op
.op
== INTRINSIC_EQ
4245 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4246 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4249 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4250 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4251 gfc_typename (op2
));
4255 case INTRINSIC_USER
:
4256 if (e
->value
.op
.uop
->op
== NULL
)
4258 const char *name
= e
->value
.op
.uop
->name
;
4259 const char *guessed
;
4260 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4262 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4265 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4267 else if (op2
== NULL
)
4268 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4269 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4272 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4273 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4274 gfc_typename (op2
));
4275 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4280 case INTRINSIC_PARENTHESES
:
4282 if (e
->ts
.type
== BT_CHARACTER
)
4283 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4287 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4290 /* Deal with arrayness of an operand through an operator. */
4292 switch (e
->value
.op
.op
)
4294 case INTRINSIC_PLUS
:
4295 case INTRINSIC_MINUS
:
4296 case INTRINSIC_TIMES
:
4297 case INTRINSIC_DIVIDE
:
4298 case INTRINSIC_POWER
:
4299 case INTRINSIC_CONCAT
:
4303 case INTRINSIC_NEQV
:
4305 case INTRINSIC_EQ_OS
:
4307 case INTRINSIC_NE_OS
:
4309 case INTRINSIC_GT_OS
:
4311 case INTRINSIC_GE_OS
:
4313 case INTRINSIC_LT_OS
:
4315 case INTRINSIC_LE_OS
:
4317 if (op1
->rank
== 0 && op2
->rank
== 0)
4320 if (op1
->rank
== 0 && op2
->rank
!= 0)
4322 e
->rank
= op2
->rank
;
4324 if (e
->shape
== NULL
)
4325 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4328 if (op1
->rank
!= 0 && op2
->rank
== 0)
4330 e
->rank
= op1
->rank
;
4332 if (e
->shape
== NULL
)
4333 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4336 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4338 if (op1
->rank
== op2
->rank
)
4340 e
->rank
= op1
->rank
;
4341 if (e
->shape
== NULL
)
4343 t
= compare_shapes (op1
, op2
);
4347 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4352 /* Allow higher level expressions to work. */
4355 /* Try user-defined operators, and otherwise throw an error. */
4356 dual_locus_error
= true;
4358 _("Inconsistent ranks for operator at %%L and %%L"));
4365 case INTRINSIC_PARENTHESES
:
4367 case INTRINSIC_UPLUS
:
4368 case INTRINSIC_UMINUS
:
4369 /* Simply copy arrayness attribute */
4370 e
->rank
= op1
->rank
;
4372 if (e
->shape
== NULL
)
4373 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4383 /* Attempt to simplify the expression. */
4386 t
= gfc_simplify_expr (e
, 0);
4387 /* Some calls do not succeed in simplification and return false
4388 even though there is no error; e.g. variable references to
4389 PARAMETER arrays. */
4390 if (!gfc_is_constant_expr (e
))
4398 match m
= gfc_extend_expr (e
);
4401 if (m
== MATCH_ERROR
)
4405 if (dual_locus_error
)
4406 gfc_error (msg
, &op1
->where
, &op2
->where
);
4408 gfc_error (msg
, &e
->where
);
4414 /************** Array resolution subroutines **************/
4417 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4419 /* Compare two integer expressions. */
4421 static compare_result
4422 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4426 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4427 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4430 /* If either of the types isn't INTEGER, we must have
4431 raised an error earlier. */
4433 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4436 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4446 /* Compare an integer expression with an integer. */
4448 static compare_result
4449 compare_bound_int (gfc_expr
*a
, int b
)
4453 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4456 if (a
->ts
.type
!= BT_INTEGER
)
4457 gfc_internal_error ("compare_bound_int(): Bad expression");
4459 i
= mpz_cmp_si (a
->value
.integer
, b
);
4469 /* Compare an integer expression with a mpz_t. */
4471 static compare_result
4472 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4476 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4479 if (a
->ts
.type
!= BT_INTEGER
)
4480 gfc_internal_error ("compare_bound_int(): Bad expression");
4482 i
= mpz_cmp (a
->value
.integer
, b
);
4492 /* Compute the last value of a sequence given by a triplet.
4493 Return 0 if it wasn't able to compute the last value, or if the
4494 sequence if empty, and 1 otherwise. */
4497 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4498 gfc_expr
*stride
, mpz_t last
)
4502 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4503 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4504 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4507 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4508 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4511 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4513 if (compare_bound (start
, end
) == CMP_GT
)
4515 mpz_set (last
, end
->value
.integer
);
4519 if (compare_bound_int (stride
, 0) == CMP_GT
)
4521 /* Stride is positive */
4522 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4527 /* Stride is negative */
4528 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4533 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4534 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4535 mpz_sub (last
, end
->value
.integer
, rem
);
4542 /* Compare a single dimension of an array reference to the array
4546 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4550 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4552 gcc_assert (ar
->stride
[i
] == NULL
);
4553 /* This implies [*] as [*:] and [*:3] are not possible. */
4554 if (ar
->start
[i
] == NULL
)
4556 gcc_assert (ar
->end
[i
] == NULL
);
4561 /* Given start, end and stride values, calculate the minimum and
4562 maximum referenced indexes. */
4564 switch (ar
->dimen_type
[i
])
4567 case DIMEN_THIS_IMAGE
:
4572 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4575 gfc_warning (0, "Array reference at %L is out of bounds "
4576 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4577 mpz_get_si (ar
->start
[i
]->value
.integer
),
4578 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4580 gfc_warning (0, "Array reference at %L is out of bounds "
4581 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4582 mpz_get_si (ar
->start
[i
]->value
.integer
),
4583 mpz_get_si (as
->lower
[i
]->value
.integer
),
4587 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4590 gfc_warning (0, "Array reference at %L is out of bounds "
4591 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4592 mpz_get_si (ar
->start
[i
]->value
.integer
),
4593 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4595 gfc_warning (0, "Array reference at %L is out of bounds "
4596 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4597 mpz_get_si (ar
->start
[i
]->value
.integer
),
4598 mpz_get_si (as
->upper
[i
]->value
.integer
),
4607 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4608 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4610 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4612 /* Check for zero stride, which is not allowed. */
4613 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4615 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4619 /* if start == len || (stride > 0 && start < len)
4620 || (stride < 0 && start > len),
4621 then the array section contains at least one element. In this
4622 case, there is an out-of-bounds access if
4623 (start < lower || start > upper). */
4624 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4625 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4626 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4627 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4628 && comp_start_end
== CMP_GT
))
4630 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4632 gfc_warning (0, "Lower array reference at %L is out of bounds "
4633 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4634 mpz_get_si (AR_START
->value
.integer
),
4635 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4638 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4640 gfc_warning (0, "Lower array reference at %L is out of bounds "
4641 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4642 mpz_get_si (AR_START
->value
.integer
),
4643 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4648 /* If we can compute the highest index of the array section,
4649 then it also has to be between lower and upper. */
4650 mpz_init (last_value
);
4651 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4654 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4656 gfc_warning (0, "Upper array reference at %L is out of bounds "
4657 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4658 mpz_get_si (last_value
),
4659 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4660 mpz_clear (last_value
);
4663 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4665 gfc_warning (0, "Upper array reference at %L is out of bounds "
4666 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4667 mpz_get_si (last_value
),
4668 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4669 mpz_clear (last_value
);
4673 mpz_clear (last_value
);
4681 gfc_internal_error ("check_dimension(): Bad array reference");
4688 /* Compare an array reference with an array specification. */
4691 compare_spec_to_ref (gfc_array_ref
*ar
)
4698 /* TODO: Full array sections are only allowed as actual parameters. */
4699 if (as
->type
== AS_ASSUMED_SIZE
4700 && (/*ar->type == AR_FULL
4701 ||*/ (ar
->type
== AR_SECTION
4702 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4704 gfc_error ("Rightmost upper bound of assumed size array section "
4705 "not specified at %L", &ar
->where
);
4709 if (ar
->type
== AR_FULL
)
4712 if (as
->rank
!= ar
->dimen
)
4714 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4715 &ar
->where
, ar
->dimen
, as
->rank
);
4719 /* ar->codimen == 0 is a local array. */
4720 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4722 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4723 &ar
->where
, ar
->codimen
, as
->corank
);
4727 for (i
= 0; i
< as
->rank
; i
++)
4728 if (!check_dimension (i
, ar
, as
))
4731 /* Local access has no coarray spec. */
4732 if (ar
->codimen
!= 0)
4733 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4735 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4736 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4738 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4739 i
+ 1 - as
->rank
, &ar
->where
);
4742 if (!check_dimension (i
, ar
, as
))
4750 /* Resolve one part of an array index. */
4753 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4754 int force_index_integer_kind
)
4761 if (!gfc_resolve_expr (index
))
4764 if (check_scalar
&& index
->rank
!= 0)
4766 gfc_error ("Array index at %L must be scalar", &index
->where
);
4770 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4772 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4773 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4777 if (index
->ts
.type
== BT_REAL
)
4778 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4782 if ((index
->ts
.kind
!= gfc_index_integer_kind
4783 && force_index_integer_kind
)
4784 || index
->ts
.type
!= BT_INTEGER
)
4787 ts
.type
= BT_INTEGER
;
4788 ts
.kind
= gfc_index_integer_kind
;
4790 gfc_convert_type_warn (index
, &ts
, 2, 0);
4796 /* Resolve one part of an array index. */
4799 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4801 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4804 /* Resolve a dim argument to an intrinsic function. */
4807 gfc_resolve_dim_arg (gfc_expr
*dim
)
4812 if (!gfc_resolve_expr (dim
))
4817 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4822 if (dim
->ts
.type
!= BT_INTEGER
)
4824 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4828 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4833 ts
.type
= BT_INTEGER
;
4834 ts
.kind
= gfc_index_integer_kind
;
4836 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4842 /* Given an expression that contains array references, update those array
4843 references to point to the right array specifications. While this is
4844 filled in during matching, this information is difficult to save and load
4845 in a module, so we take care of it here.
4847 The idea here is that the original array reference comes from the
4848 base symbol. We traverse the list of reference structures, setting
4849 the stored reference to references. Component references can
4850 provide an additional array specification. */
4853 find_array_spec (gfc_expr
*e
)
4858 bool class_as
= false;
4860 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4862 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4866 as
= e
->symtree
->n
.sym
->as
;
4868 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4873 gfc_internal_error ("find_array_spec(): Missing spec");
4880 c
= ref
->u
.c
.component
;
4881 if (c
->attr
.dimension
)
4883 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4884 gfc_internal_error ("find_array_spec(): unused as(1)");
4896 gfc_internal_error ("find_array_spec(): unused as(2)");
4900 /* Resolve an array reference. */
4903 resolve_array_ref (gfc_array_ref
*ar
)
4905 int i
, check_scalar
;
4908 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4910 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4912 /* Do not force gfc_index_integer_kind for the start. We can
4913 do fine with any integer kind. This avoids temporary arrays
4914 created for indexing with a vector. */
4915 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4917 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4919 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4924 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4928 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4932 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4933 if (e
->expr_type
== EXPR_VARIABLE
4934 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4935 ar
->start
[i
] = gfc_get_parentheses (e
);
4939 gfc_error ("Array index at %L is an array of rank %d",
4940 &ar
->c_where
[i
], e
->rank
);
4944 /* Fill in the upper bound, which may be lower than the
4945 specified one for something like a(2:10:5), which is
4946 identical to a(2:7:5). Only relevant for strides not equal
4947 to one. Don't try a division by zero. */
4948 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4949 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4950 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4951 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4955 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4957 if (ar
->end
[i
] == NULL
)
4960 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4962 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4964 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4965 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4967 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4978 if (ar
->type
== AR_FULL
)
4980 if (ar
->as
->rank
== 0)
4981 ar
->type
= AR_ELEMENT
;
4983 /* Make sure array is the same as array(:,:), this way
4984 we don't need to special case all the time. */
4985 ar
->dimen
= ar
->as
->rank
;
4986 for (i
= 0; i
< ar
->dimen
; i
++)
4988 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4990 gcc_assert (ar
->start
[i
] == NULL
);
4991 gcc_assert (ar
->end
[i
] == NULL
);
4992 gcc_assert (ar
->stride
[i
] == NULL
);
4996 /* If the reference type is unknown, figure out what kind it is. */
4998 if (ar
->type
== AR_UNKNOWN
)
5000 ar
->type
= AR_ELEMENT
;
5001 for (i
= 0; i
< ar
->dimen
; i
++)
5002 if (ar
->dimen_type
[i
] == DIMEN_RANGE
5003 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
5005 ar
->type
= AR_SECTION
;
5010 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
5013 if (ar
->as
->corank
&& ar
->codimen
== 0)
5016 ar
->codimen
= ar
->as
->corank
;
5017 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
5018 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
5026 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
5028 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
5030 if (ref
->u
.ss
.start
!= NULL
)
5032 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
5035 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
5037 gfc_error ("Substring start index at %L must be of type INTEGER",
5038 &ref
->u
.ss
.start
->where
);
5042 if (ref
->u
.ss
.start
->rank
!= 0)
5044 gfc_error ("Substring start index at %L must be scalar",
5045 &ref
->u
.ss
.start
->where
);
5049 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
5050 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5051 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5053 gfc_error ("Substring start index at %L is less than one",
5054 &ref
->u
.ss
.start
->where
);
5059 if (ref
->u
.ss
.end
!= NULL
)
5061 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
5064 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
5066 gfc_error ("Substring end index at %L must be of type INTEGER",
5067 &ref
->u
.ss
.end
->where
);
5071 if (ref
->u
.ss
.end
->rank
!= 0)
5073 gfc_error ("Substring end index at %L must be scalar",
5074 &ref
->u
.ss
.end
->where
);
5078 if (ref
->u
.ss
.length
!= NULL
5079 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5080 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5081 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5083 gfc_error ("Substring end index at %L exceeds the string length",
5084 &ref
->u
.ss
.start
->where
);
5088 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5089 gfc_integer_kinds
[k
].huge
) == CMP_GT
5090 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5091 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5093 gfc_error ("Substring end index at %L is too large",
5094 &ref
->u
.ss
.end
->where
);
5097 /* If the substring has the same length as the original
5098 variable, the reference itself can be deleted. */
5100 if (ref
->u
.ss
.length
!= NULL
5101 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5102 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5103 *equal_length
= true;
5110 /* This function supplies missing substring charlens. */
5113 gfc_resolve_substring_charlen (gfc_expr
*e
)
5116 gfc_expr
*start
, *end
;
5117 gfc_typespec
*ts
= NULL
;
5120 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5122 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5124 if (char_ref
->type
== REF_COMPONENT
)
5125 ts
= &char_ref
->u
.c
.component
->ts
;
5128 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5131 gcc_assert (char_ref
->next
== NULL
);
5135 if (e
->ts
.u
.cl
->length
)
5136 gfc_free_expr (e
->ts
.u
.cl
->length
);
5137 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5141 e
->ts
.type
= BT_CHARACTER
;
5142 e
->ts
.kind
= gfc_default_character_kind
;
5145 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5147 if (char_ref
->u
.ss
.start
)
5148 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5150 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5152 if (char_ref
->u
.ss
.end
)
5153 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5154 else if (e
->expr_type
== EXPR_VARIABLE
)
5157 ts
= &e
->symtree
->n
.sym
->ts
;
5158 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5165 gfc_free_expr (start
);
5166 gfc_free_expr (end
);
5170 /* Length = (end - start + 1).
5171 Check first whether it has a constant length. */
5172 if (gfc_dep_difference (end
, start
, &diff
))
5174 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5177 mpz_add_ui (len
->value
.integer
, diff
, 1);
5179 e
->ts
.u
.cl
->length
= len
;
5180 /* The check for length < 0 is handled below */
5184 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5185 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5186 gfc_get_int_expr (gfc_charlen_int_kind
,
5190 /* F2008, 6.4.1: Both the starting point and the ending point shall
5191 be within the range 1, 2, ..., n unless the starting point exceeds
5192 the ending point, in which case the substring has length zero. */
5194 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5195 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5197 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5198 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5200 /* Make sure that the length is simplified. */
5201 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5202 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5206 /* Resolve subtype references. */
5209 gfc_resolve_ref (gfc_expr
*expr
)
5211 int current_part_dimension
, n_components
, seen_part_dimension
, dim
;
5212 gfc_ref
*ref
, **prev
, *array_ref
;
5215 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5216 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5218 find_array_spec (expr
);
5222 for (prev
= &expr
->ref
; *prev
!= NULL
;
5223 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5224 switch ((*prev
)->type
)
5227 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5236 equal_length
= false;
5237 if (!resolve_substring (*prev
, &equal_length
))
5240 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5242 /* Remove the reference and move the charlen, if any. */
5246 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5247 ref
->u
.ss
.length
= NULL
;
5248 gfc_free_ref_list (ref
);
5253 /* Check constraints on part references. */
5255 current_part_dimension
= 0;
5256 seen_part_dimension
= 0;
5260 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5266 switch (ref
->u
.ar
.type
)
5269 /* Coarray scalar. */
5270 if (ref
->u
.ar
.as
->rank
== 0)
5272 current_part_dimension
= 0;
5277 current_part_dimension
= 1;
5282 current_part_dimension
= 0;
5286 gfc_internal_error ("resolve_ref(): Bad array reference");
5292 if (current_part_dimension
|| seen_part_dimension
)
5295 if (ref
->u
.c
.component
->attr
.pointer
5296 || ref
->u
.c
.component
->attr
.proc_pointer
5297 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5298 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5300 gfc_error ("Component to the right of a part reference "
5301 "with nonzero rank must not have the POINTER "
5302 "attribute at %L", &expr
->where
);
5305 else if (ref
->u
.c
.component
->attr
.allocatable
5306 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5307 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5310 gfc_error ("Component to the right of a part reference "
5311 "with nonzero rank must not have the ALLOCATABLE "
5312 "attribute at %L", &expr
->where
);
5324 /* Implement requirement in note 9.7 of F2018 that the result of the
5325 LEN inquiry be a scalar. */
5326 if (ref
->u
.i
== INQUIRY_LEN
&& array_ref
&& expr
->ts
.deferred
)
5328 array_ref
->u
.ar
.type
= AR_ELEMENT
;
5330 /* INQUIRY_LEN is not evaluated from the rest of the expr
5331 but directly from the string length. This means that setting
5332 the array indices to one does not matter but might trigger
5333 a runtime bounds error. Suppress the check. */
5334 expr
->no_bounds_check
= 1;
5335 for (dim
= 0; dim
< array_ref
->u
.ar
.dimen
; dim
++)
5337 array_ref
->u
.ar
.dimen_type
[dim
] = DIMEN_ELEMENT
;
5338 if (array_ref
->u
.ar
.start
[dim
])
5339 gfc_free_expr (array_ref
->u
.ar
.start
[dim
]);
5340 array_ref
->u
.ar
.start
[dim
]
5341 = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
5342 if (array_ref
->u
.ar
.end
[dim
])
5343 gfc_free_expr (array_ref
->u
.ar
.end
[dim
]);
5344 if (array_ref
->u
.ar
.stride
[dim
])
5345 gfc_free_expr (array_ref
->u
.ar
.stride
[dim
]);
5351 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5352 || ref
->next
== NULL
)
5353 && current_part_dimension
5354 && seen_part_dimension
)
5356 gfc_error ("Two or more part references with nonzero rank must "
5357 "not be specified at %L", &expr
->where
);
5361 if (ref
->type
== REF_COMPONENT
)
5363 if (current_part_dimension
)
5364 seen_part_dimension
= 1;
5366 /* reset to make sure */
5367 current_part_dimension
= 0;
5375 /* Given an expression, determine its shape. This is easier than it sounds.
5376 Leaves the shape array NULL if it is not possible to determine the shape. */
5379 expression_shape (gfc_expr
*e
)
5381 mpz_t array
[GFC_MAX_DIMENSIONS
];
5384 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5387 for (i
= 0; i
< e
->rank
; i
++)
5388 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5391 e
->shape
= gfc_get_shape (e
->rank
);
5393 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5398 for (i
--; i
>= 0; i
--)
5399 mpz_clear (array
[i
]);
5403 /* Given a variable expression node, compute the rank of the expression by
5404 examining the base symbol and any reference structures it may have. */
5407 gfc_expression_rank (gfc_expr
*e
)
5412 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5413 could lead to serious confusion... */
5414 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5418 if (e
->expr_type
== EXPR_ARRAY
)
5420 /* Constructors can have a rank different from one via RESHAPE(). */
5422 e
->rank
= ((e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
)
5423 ? 0 : e
->symtree
->n
.sym
->as
->rank
);
5429 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5431 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5432 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5433 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5435 if (ref
->type
!= REF_ARRAY
)
5438 if (ref
->u
.ar
.type
== AR_FULL
)
5440 rank
= ref
->u
.ar
.as
->rank
;
5444 if (ref
->u
.ar
.type
== AR_SECTION
)
5446 /* Figure out the rank of the section. */
5448 gfc_internal_error ("gfc_expression_rank(): Two array specs");
5450 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5451 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5452 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5462 expression_shape (e
);
5467 add_caf_get_intrinsic (gfc_expr
*e
)
5469 gfc_expr
*wrapper
, *tmp_expr
;
5473 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5474 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5479 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5480 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5483 tmp_expr
= XCNEW (gfc_expr
);
5485 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5486 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5487 wrapper
->ts
= e
->ts
;
5488 wrapper
->rank
= e
->rank
;
5490 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5497 remove_caf_get_intrinsic (gfc_expr
*e
)
5499 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5500 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5501 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5502 e
->value
.function
.actual
->expr
= NULL
;
5503 gfc_free_actual_arglist (e
->value
.function
.actual
);
5504 gfc_free_shape (&e
->shape
, e
->rank
);
5510 /* Resolve a variable expression. */
5513 resolve_variable (gfc_expr
*e
)
5520 if (e
->symtree
== NULL
)
5522 sym
= e
->symtree
->n
.sym
;
5524 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5525 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5526 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5528 if (!actual_arg
|| inquiry_argument
)
5530 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5531 "be used as actual argument", sym
->name
, &e
->where
);
5535 /* TS 29113, 407b. */
5536 else if (e
->ts
.type
== BT_ASSUMED
)
5540 gfc_error ("Assumed-type variable %s at %L may only be used "
5541 "as actual argument", sym
->name
, &e
->where
);
5544 else if (inquiry_argument
&& !first_actual_arg
)
5546 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5547 for all inquiry functions in resolve_function; the reason is
5548 that the function-name resolution happens too late in that
5550 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5551 "an inquiry function shall be the first argument",
5552 sym
->name
, &e
->where
);
5556 /* TS 29113, C535b. */
5557 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5558 && CLASS_DATA (sym
)->as
5559 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5560 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5561 && sym
->as
->type
== AS_ASSUMED_RANK
))
5562 && !sym
->attr
.select_rank_temporary
)
5565 && !(cs_base
&& cs_base
->current
5566 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5568 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5569 "actual argument", sym
->name
, &e
->where
);
5572 else if (inquiry_argument
&& !first_actual_arg
)
5574 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5575 for all inquiry functions in resolve_function; the reason is
5576 that the function-name resolution happens too late in that
5578 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5579 "to an inquiry function shall be the first argument",
5580 sym
->name
, &e
->where
);
5585 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5586 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5587 && e
->ref
->next
== NULL
))
5589 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5590 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5593 /* TS 29113, 407b. */
5594 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5595 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5596 && e
->ref
->next
== NULL
))
5598 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5599 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5603 /* TS 29113, C535b. */
5604 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5605 && CLASS_DATA (sym
)->as
5606 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5607 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5608 && sym
->as
->type
== AS_ASSUMED_RANK
))
5610 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5611 && e
->ref
->next
== NULL
))
5613 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5614 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5618 /* For variables that are used in an associate (target => object) where
5619 the object's basetype is array valued while the target is scalar,
5620 the ts' type of the component refs is still array valued, which
5621 can't be translated that way. */
5622 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5623 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5624 && CLASS_DATA (sym
->assoc
->target
)->as
)
5626 gfc_ref
*ref
= e
->ref
;
5632 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5633 /* Stop the loop. */
5643 /* If this is an associate-name, it may be parsed with an array reference
5644 in error even though the target is scalar. Fail directly in this case.
5645 TODO Understand why class scalar expressions must be excluded. */
5646 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5648 if (sym
->ts
.type
== BT_CLASS
)
5649 gfc_fix_class_refs (e
);
5650 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5652 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5654 /* This can happen because the parser did not detect that the
5655 associate name is an array and the expression had no array
5657 gfc_ref
*ref
= gfc_get_ref ();
5658 ref
->type
= REF_ARRAY
;
5659 ref
->u
.ar
= *gfc_get_array_ref();
5660 ref
->u
.ar
.type
= AR_FULL
;
5663 ref
->u
.ar
.as
= sym
->as
;
5664 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5672 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5673 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5675 /* On the other hand, the parser may not have known this is an array;
5676 in this case, we have to add a FULL reference. */
5677 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5679 e
->ref
= gfc_get_ref ();
5680 e
->ref
->type
= REF_ARRAY
;
5681 e
->ref
->u
.ar
.type
= AR_FULL
;
5682 e
->ref
->u
.ar
.dimen
= 0;
5685 /* Like above, but for class types, where the checking whether an array
5686 ref is present is more complicated. Furthermore make sure not to add
5687 the full array ref to _vptr or _len refs. */
5688 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5689 && CLASS_DATA (sym
)->attr
.dimension
5690 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5692 gfc_ref
*ref
, *newref
;
5694 newref
= gfc_get_ref ();
5695 newref
->type
= REF_ARRAY
;
5696 newref
->u
.ar
.type
= AR_FULL
;
5697 newref
->u
.ar
.dimen
= 0;
5698 /* Because this is an associate var and the first ref either is a ref to
5699 the _data component or not, no traversal of the ref chain is
5700 needed. The array ref needs to be inserted after the _data ref,
5701 or when that is not present, which may happend for polymorphic
5702 types, then at the first position. */
5706 else if (ref
->type
== REF_COMPONENT
5707 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5709 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5711 newref
->next
= ref
->next
;
5715 /* Array ref present already. */
5716 gfc_free_ref_list (newref
);
5718 else if (ref
->type
== REF_ARRAY
)
5719 /* Array ref present already. */
5720 gfc_free_ref_list (newref
);
5728 if (e
->ref
&& !gfc_resolve_ref (e
))
5731 if (sym
->attr
.flavor
== FL_PROCEDURE
5732 && (!sym
->attr
.function
5733 || (sym
->attr
.function
&& sym
->result
5734 && sym
->result
->attr
.proc_pointer
5735 && !sym
->result
->attr
.function
)))
5737 e
->ts
.type
= BT_PROCEDURE
;
5738 goto resolve_procedure
;
5741 if (sym
->ts
.type
!= BT_UNKNOWN
)
5742 gfc_variable_attr (e
, &e
->ts
);
5743 else if (sym
->attr
.flavor
== FL_PROCEDURE
5744 && sym
->attr
.function
&& sym
->result
5745 && sym
->result
->ts
.type
!= BT_UNKNOWN
5746 && sym
->result
->attr
.proc_pointer
)
5747 e
->ts
= sym
->result
->ts
;
5750 /* Must be a simple variable reference. */
5751 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5756 if (check_assumed_size_reference (sym
, e
))
5759 /* Deal with forward references to entries during gfc_resolve_code, to
5760 satisfy, at least partially, 12.5.2.5. */
5761 if (gfc_current_ns
->entries
5762 && current_entry_id
== sym
->entry_id
5765 && cs_base
->current
->op
!= EXEC_ENTRY
)
5767 gfc_entry_list
*entry
;
5768 gfc_formal_arglist
*formal
;
5770 bool seen
, saved_specification_expr
;
5772 /* If the symbol is a dummy... */
5773 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5775 entry
= gfc_current_ns
->entries
;
5778 /* ...test if the symbol is a parameter of previous entries. */
5779 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5780 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5782 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5789 /* If it has not been seen as a dummy, this is an error. */
5792 if (specification_expr
)
5793 gfc_error ("Variable %qs, used in a specification expression"
5794 ", is referenced at %L before the ENTRY statement "
5795 "in which it is a parameter",
5796 sym
->name
, &cs_base
->current
->loc
);
5798 gfc_error ("Variable %qs is used at %L before the ENTRY "
5799 "statement in which it is a parameter",
5800 sym
->name
, &cs_base
->current
->loc
);
5805 /* Now do the same check on the specification expressions. */
5806 saved_specification_expr
= specification_expr
;
5807 specification_expr
= true;
5808 if (sym
->ts
.type
== BT_CHARACTER
5809 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5813 for (n
= 0; n
< sym
->as
->rank
; n
++)
5815 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5817 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5820 specification_expr
= saved_specification_expr
;
5823 /* Update the symbol's entry level. */
5824 sym
->entry_id
= current_entry_id
+ 1;
5827 /* If a symbol has been host_associated mark it. This is used latter,
5828 to identify if aliasing is possible via host association. */
5829 if (sym
->attr
.flavor
== FL_VARIABLE
5830 && gfc_current_ns
->parent
5831 && (gfc_current_ns
->parent
== sym
->ns
5832 || (gfc_current_ns
->parent
->parent
5833 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5834 sym
->attr
.host_assoc
= 1;
5836 if (gfc_current_ns
->proc_name
5837 && sym
->attr
.dimension
5838 && (sym
->ns
!= gfc_current_ns
5839 || sym
->attr
.use_assoc
5840 || sym
->attr
.in_common
))
5841 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5844 if (t
&& !resolve_procedure_expression (e
))
5847 /* F2008, C617 and C1229. */
5848 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5849 && gfc_is_coindexed (e
))
5851 gfc_ref
*ref
, *ref2
= NULL
;
5853 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5855 if (ref
->type
== REF_COMPONENT
)
5857 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5861 for ( ; ref
; ref
= ref
->next
)
5862 if (ref
->type
== REF_COMPONENT
)
5865 /* Expression itself is not coindexed object. */
5866 if (ref
&& e
->ts
.type
== BT_CLASS
)
5868 gfc_error ("Polymorphic subobject of coindexed object at %L",
5873 /* Expression itself is coindexed object. */
5877 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5878 for ( ; c
; c
= c
->next
)
5879 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5881 gfc_error ("Coindexed object with polymorphic allocatable "
5882 "subcomponent at %L", &e
->where
);
5890 gfc_expression_rank (e
);
5892 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5893 add_caf_get_intrinsic (e
);
5895 /* Simplify cases where access to a parameter array results in a
5896 single constant. Suppress errors since those will have been
5897 issued before, as warnings. */
5898 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5900 gfc_push_suppress_errors ();
5901 gfc_simplify_expr (e
, 1);
5902 gfc_pop_suppress_errors ();
5909 /* Checks to see that the correct symbol has been host associated.
5910 The only situation where this arises is that in which a twice
5911 contained function is parsed after the host association is made.
5912 Therefore, on detecting this, change the symbol in the expression
5913 and convert the array reference into an actual arglist if the old
5914 symbol is a variable. */
5916 check_host_association (gfc_expr
*e
)
5918 gfc_symbol
*sym
, *old_sym
;
5922 gfc_actual_arglist
*arg
, *tail
= NULL
;
5923 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5925 /* If the expression is the result of substitution in
5926 interface.c(gfc_extend_expr) because there is no way in
5927 which the host association can be wrong. */
5928 if (e
->symtree
== NULL
5929 || e
->symtree
->n
.sym
== NULL
5930 || e
->user_operator
)
5933 old_sym
= e
->symtree
->n
.sym
;
5935 if (gfc_current_ns
->parent
5936 && old_sym
->ns
!= gfc_current_ns
)
5938 /* Use the 'USE' name so that renamed module symbols are
5939 correctly handled. */
5940 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5942 if (sym
&& old_sym
!= sym
5943 && sym
->ts
.type
== old_sym
->ts
.type
5944 && sym
->attr
.flavor
== FL_PROCEDURE
5945 && sym
->attr
.contained
)
5947 /* Clear the shape, since it might not be valid. */
5948 gfc_free_shape (&e
->shape
, e
->rank
);
5950 /* Give the expression the right symtree! */
5951 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5952 gcc_assert (st
!= NULL
);
5954 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5955 || e
->expr_type
== EXPR_FUNCTION
)
5957 /* Original was function so point to the new symbol, since
5958 the actual argument list is already attached to the
5960 e
->value
.function
.esym
= NULL
;
5965 /* Original was variable so convert array references into
5966 an actual arglist. This does not need any checking now
5967 since resolve_function will take care of it. */
5968 e
->value
.function
.actual
= NULL
;
5969 e
->expr_type
= EXPR_FUNCTION
;
5972 /* Ambiguity will not arise if the array reference is not
5973 the last reference. */
5974 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5975 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5978 gcc_assert (ref
->type
== REF_ARRAY
);
5980 /* Grab the start expressions from the array ref and
5981 copy them into actual arguments. */
5982 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5984 arg
= gfc_get_actual_arglist ();
5985 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5986 if (e
->value
.function
.actual
== NULL
)
5987 tail
= e
->value
.function
.actual
= arg
;
5995 /* Dump the reference list and set the rank. */
5996 gfc_free_ref_list (e
->ref
);
5998 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
6001 gfc_resolve_expr (e
);
6005 /* This might have changed! */
6006 return e
->expr_type
== EXPR_FUNCTION
;
6011 gfc_resolve_character_operator (gfc_expr
*e
)
6013 gfc_expr
*op1
= e
->value
.op
.op1
;
6014 gfc_expr
*op2
= e
->value
.op
.op2
;
6015 gfc_expr
*e1
= NULL
;
6016 gfc_expr
*e2
= NULL
;
6018 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
6020 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
6021 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
6022 else if (op1
->expr_type
== EXPR_CONSTANT
)
6023 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6024 op1
->value
.character
.length
);
6026 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
6027 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
6028 else if (op2
->expr_type
== EXPR_CONSTANT
)
6029 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6030 op2
->value
.character
.length
);
6032 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6042 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
6043 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
6044 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
6045 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
6046 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
6052 /* Ensure that an character expression has a charlen and, if possible, a
6053 length expression. */
6056 fixup_charlen (gfc_expr
*e
)
6058 /* The cases fall through so that changes in expression type and the need
6059 for multiple fixes are picked up. In all circumstances, a charlen should
6060 be available for the middle end to hang a backend_decl on. */
6061 switch (e
->expr_type
)
6064 gfc_resolve_character_operator (e
);
6068 if (e
->expr_type
== EXPR_ARRAY
)
6069 gfc_resolve_character_array_constructor (e
);
6072 case EXPR_SUBSTRING
:
6073 if (!e
->ts
.u
.cl
&& e
->ref
)
6074 gfc_resolve_substring_charlen (e
);
6079 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6086 /* Update an actual argument to include the passed-object for type-bound
6087 procedures at the right position. */
6089 static gfc_actual_arglist
*
6090 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6093 gcc_assert (argpos
> 0);
6097 gfc_actual_arglist
* result
;
6099 result
= gfc_get_actual_arglist ();
6103 result
->name
= name
;
6109 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6111 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6116 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6119 extract_compcall_passed_object (gfc_expr
* e
)
6123 if (e
->expr_type
== EXPR_UNKNOWN
)
6125 gfc_error ("Error in typebound call at %L",
6130 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6132 if (e
->value
.compcall
.base_object
)
6133 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6136 po
= gfc_get_expr ();
6137 po
->expr_type
= EXPR_VARIABLE
;
6138 po
->symtree
= e
->symtree
;
6139 po
->ref
= gfc_copy_ref (e
->ref
);
6140 po
->where
= e
->where
;
6143 if (!gfc_resolve_expr (po
))
6150 /* Update the arglist of an EXPR_COMPCALL expression to include the
6154 update_compcall_arglist (gfc_expr
* e
)
6157 gfc_typebound_proc
* tbp
;
6159 tbp
= e
->value
.compcall
.tbp
;
6164 po
= extract_compcall_passed_object (e
);
6168 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6174 if (tbp
->pass_arg_num
<= 0)
6177 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6185 /* Extract the passed object from a PPC call (a copy of it). */
6188 extract_ppc_passed_object (gfc_expr
*e
)
6193 po
= gfc_get_expr ();
6194 po
->expr_type
= EXPR_VARIABLE
;
6195 po
->symtree
= e
->symtree
;
6196 po
->ref
= gfc_copy_ref (e
->ref
);
6197 po
->where
= e
->where
;
6199 /* Remove PPC reference. */
6201 while ((*ref
)->next
)
6202 ref
= &(*ref
)->next
;
6203 gfc_free_ref_list (*ref
);
6206 if (!gfc_resolve_expr (po
))
6213 /* Update the actual arglist of a procedure pointer component to include the
6217 update_ppc_arglist (gfc_expr
* e
)
6221 gfc_typebound_proc
* tb
;
6223 ppc
= gfc_get_proc_ptr_comp (e
);
6231 else if (tb
->nopass
)
6234 po
= extract_ppc_passed_object (e
);
6241 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6246 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6248 gfc_error ("Base object for procedure-pointer component call at %L is of"
6249 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6253 gcc_assert (tb
->pass_arg_num
> 0);
6254 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6262 /* Check that the object a TBP is called on is valid, i.e. it must not be
6263 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6266 check_typebound_baseobject (gfc_expr
* e
)
6269 bool return_value
= false;
6271 base
= extract_compcall_passed_object (e
);
6275 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6277 gfc_error ("Error in typebound call at %L", &e
->where
);
6281 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6285 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6287 gfc_error ("Base object for type-bound procedure call at %L is of"
6288 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6292 /* F08:C1230. If the procedure called is NOPASS,
6293 the base object must be scalar. */
6294 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6296 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6297 " be scalar", &e
->where
);
6301 return_value
= true;
6304 gfc_free_expr (base
);
6305 return return_value
;
6309 /* Resolve a call to a type-bound procedure, either function or subroutine,
6310 statically from the data in an EXPR_COMPCALL expression. The adapted
6311 arglist and the target-procedure symtree are returned. */
6314 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6315 gfc_actual_arglist
** actual
)
6317 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6318 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6320 /* Update the actual arglist for PASS. */
6321 if (!update_compcall_arglist (e
))
6324 *actual
= e
->value
.compcall
.actual
;
6325 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6327 gfc_free_ref_list (e
->ref
);
6329 e
->value
.compcall
.actual
= NULL
;
6331 /* If we find a deferred typebound procedure, check for derived types
6332 that an overriding typebound procedure has not been missed. */
6333 if (e
->value
.compcall
.name
6334 && !e
->value
.compcall
.tbp
->non_overridable
6335 && e
->value
.compcall
.base_object
6336 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6339 gfc_symbol
*derived
;
6341 /* Use the derived type of the base_object. */
6342 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6345 /* If necessary, go through the inheritance chain. */
6346 while (!st
&& derived
)
6348 /* Look for the typebound procedure 'name'. */
6349 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6350 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6351 e
->value
.compcall
.name
);
6353 derived
= gfc_get_derived_super_type (derived
);
6356 /* Now find the specific name in the derived type namespace. */
6357 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6358 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6359 derived
->ns
, 1, &st
);
6367 /* Get the ultimate declared type from an expression. In addition,
6368 return the last class/derived type reference and the copy of the
6369 reference list. If check_types is set true, derived types are
6370 identified as well as class references. */
6372 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6373 gfc_expr
*e
, bool check_types
)
6375 gfc_symbol
*declared
;
6382 *new_ref
= gfc_copy_ref (e
->ref
);
6384 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6386 if (ref
->type
!= REF_COMPONENT
)
6389 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6390 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6391 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6393 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6399 if (declared
== NULL
)
6400 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6406 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6407 which of the specific bindings (if any) matches the arglist and transform
6408 the expression into a call of that binding. */
6411 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6413 gfc_typebound_proc
* genproc
;
6414 const char* genname
;
6416 gfc_symbol
*derived
;
6418 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6419 genname
= e
->value
.compcall
.name
;
6420 genproc
= e
->value
.compcall
.tbp
;
6422 if (!genproc
->is_generic
)
6425 /* Try the bindings on this type and in the inheritance hierarchy. */
6426 for (; genproc
; genproc
= genproc
->overridden
)
6430 gcc_assert (genproc
->is_generic
);
6431 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6434 gfc_actual_arglist
* args
;
6437 gcc_assert (g
->specific
);
6439 if (g
->specific
->error
)
6442 target
= g
->specific
->u
.specific
->n
.sym
;
6444 /* Get the right arglist by handling PASS/NOPASS. */
6445 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6446 if (!g
->specific
->nopass
)
6449 po
= extract_compcall_passed_object (e
);
6452 gfc_free_actual_arglist (args
);
6456 gcc_assert (g
->specific
->pass_arg_num
> 0);
6457 gcc_assert (!g
->specific
->error
);
6458 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6459 g
->specific
->pass_arg
);
6461 resolve_actual_arglist (args
, target
->attr
.proc
,
6462 is_external_proc (target
)
6463 && gfc_sym_get_dummy_args (target
) == NULL
);
6465 /* Check if this arglist matches the formal. */
6466 matches
= gfc_arglist_matches_symbol (&args
, target
);
6468 /* Clean up and break out of the loop if we've found it. */
6469 gfc_free_actual_arglist (args
);
6472 e
->value
.compcall
.tbp
= g
->specific
;
6473 genname
= g
->specific_st
->name
;
6474 /* Pass along the name for CLASS methods, where the vtab
6475 procedure pointer component has to be referenced. */
6483 /* Nothing matching found! */
6484 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6485 " %qs at %L", genname
, &e
->where
);
6489 /* Make sure that we have the right specific instance for the name. */
6490 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6492 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6494 e
->value
.compcall
.tbp
= st
->n
.tb
;
6500 /* Resolve a call to a type-bound subroutine. */
6503 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6505 gfc_actual_arglist
* newactual
;
6506 gfc_symtree
* target
;
6508 /* Check that's really a SUBROUTINE. */
6509 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6511 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6512 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6513 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6514 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6515 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6518 gfc_error ("%qs at %L should be a SUBROUTINE",
6519 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6524 if (!check_typebound_baseobject (c
->expr1
))
6527 /* Pass along the name for CLASS methods, where the vtab
6528 procedure pointer component has to be referenced. */
6530 *name
= c
->expr1
->value
.compcall
.name
;
6532 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6535 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6537 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6539 /* Transform into an ordinary EXEC_CALL for now. */
6541 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6544 c
->ext
.actual
= newactual
;
6545 c
->symtree
= target
;
6546 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6548 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6550 gfc_free_expr (c
->expr1
);
6551 c
->expr1
= gfc_get_expr ();
6552 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6553 c
->expr1
->symtree
= target
;
6554 c
->expr1
->where
= c
->loc
;
6556 return resolve_call (c
);
6560 /* Resolve a component-call expression. */
6562 resolve_compcall (gfc_expr
* e
, const char **name
)
6564 gfc_actual_arglist
* newactual
;
6565 gfc_symtree
* target
;
6567 /* Check that's really a FUNCTION. */
6568 if (!e
->value
.compcall
.tbp
->function
)
6570 gfc_error ("%qs at %L should be a FUNCTION",
6571 e
->value
.compcall
.name
, &e
->where
);
6576 /* These must not be assign-calls! */
6577 gcc_assert (!e
->value
.compcall
.assign
);
6579 if (!check_typebound_baseobject (e
))
6582 /* Pass along the name for CLASS methods, where the vtab
6583 procedure pointer component has to be referenced. */
6585 *name
= e
->value
.compcall
.name
;
6587 if (!resolve_typebound_generic_call (e
, name
))
6589 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6591 /* Take the rank from the function's symbol. */
6592 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6593 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6595 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6596 arglist to the TBP's binding target. */
6598 if (!resolve_typebound_static (e
, &target
, &newactual
))
6601 e
->value
.function
.actual
= newactual
;
6602 e
->value
.function
.name
= NULL
;
6603 e
->value
.function
.esym
= target
->n
.sym
;
6604 e
->value
.function
.isym
= NULL
;
6605 e
->symtree
= target
;
6606 e
->ts
= target
->n
.sym
->ts
;
6607 e
->expr_type
= EXPR_FUNCTION
;
6609 /* Resolution is not necessary if this is a class subroutine; this
6610 function only has to identify the specific proc. Resolution of
6611 the call will be done next in resolve_typebound_call. */
6612 return gfc_resolve_expr (e
);
6616 static bool resolve_fl_derived (gfc_symbol
*sym
);
6619 /* Resolve a typebound function, or 'method'. First separate all
6620 the non-CLASS references by calling resolve_compcall directly. */
6623 resolve_typebound_function (gfc_expr
* e
)
6625 gfc_symbol
*declared
;
6637 /* Deal with typebound operators for CLASS objects. */
6638 expr
= e
->value
.compcall
.base_object
;
6639 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6640 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6642 /* Since the typebound operators are generic, we have to ensure
6643 that any delays in resolution are corrected and that the vtab
6646 declared
= ts
.u
.derived
;
6647 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6648 if (c
->ts
.u
.derived
== NULL
)
6649 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6651 if (!resolve_compcall (e
, &name
))
6654 /* Use the generic name if it is there. */
6655 name
= name
? name
: e
->value
.function
.esym
->name
;
6656 e
->symtree
= expr
->symtree
;
6657 e
->ref
= gfc_copy_ref (expr
->ref
);
6658 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6660 /* Trim away the extraneous references that emerge from nested
6661 use of interface.c (extend_expr). */
6662 if (class_ref
&& class_ref
->next
)
6664 gfc_free_ref_list (class_ref
->next
);
6665 class_ref
->next
= NULL
;
6667 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6669 gfc_free_ref_list (e
->ref
);
6673 gfc_add_vptr_component (e
);
6674 gfc_add_component_ref (e
, name
);
6675 e
->value
.function
.esym
= NULL
;
6676 if (expr
->expr_type
!= EXPR_VARIABLE
)
6677 e
->base_expr
= expr
;
6682 return resolve_compcall (e
, NULL
);
6684 if (!gfc_resolve_ref (e
))
6687 /* Get the CLASS declared type. */
6688 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6690 if (!resolve_fl_derived (declared
))
6693 /* Weed out cases of the ultimate component being a derived type. */
6694 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6695 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6697 gfc_free_ref_list (new_ref
);
6698 return resolve_compcall (e
, NULL
);
6701 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6703 /* Treat the call as if it is a typebound procedure, in order to roll
6704 out the correct name for the specific function. */
6705 if (!resolve_compcall (e
, &name
))
6707 gfc_free_ref_list (new_ref
);
6714 /* Convert the expression to a procedure pointer component call. */
6715 e
->value
.function
.esym
= NULL
;
6721 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6722 gfc_add_vptr_component (e
);
6723 gfc_add_component_ref (e
, name
);
6725 /* Recover the typespec for the expression. This is really only
6726 necessary for generic procedures, where the additional call
6727 to gfc_add_component_ref seems to throw the collection of the
6728 correct typespec. */
6732 gfc_free_ref_list (new_ref
);
6737 /* Resolve a typebound subroutine, or 'method'. First separate all
6738 the non-CLASS references by calling resolve_typebound_call
6742 resolve_typebound_subroutine (gfc_code
*code
)
6744 gfc_symbol
*declared
;
6754 st
= code
->expr1
->symtree
;
6756 /* Deal with typebound operators for CLASS objects. */
6757 expr
= code
->expr1
->value
.compcall
.base_object
;
6758 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6759 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6761 /* If the base_object is not a variable, the corresponding actual
6762 argument expression must be stored in e->base_expression so
6763 that the corresponding tree temporary can be used as the base
6764 object in gfc_conv_procedure_call. */
6765 if (expr
->expr_type
!= EXPR_VARIABLE
)
6767 gfc_actual_arglist
*args
;
6769 args
= code
->expr1
->value
.function
.actual
;
6770 for (; args
; args
= args
->next
)
6771 if (expr
== args
->expr
)
6775 /* Since the typebound operators are generic, we have to ensure
6776 that any delays in resolution are corrected and that the vtab
6778 declared
= expr
->ts
.u
.derived
;
6779 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6780 if (c
->ts
.u
.derived
== NULL
)
6781 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6783 if (!resolve_typebound_call (code
, &name
, NULL
))
6786 /* Use the generic name if it is there. */
6787 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6788 code
->expr1
->symtree
= expr
->symtree
;
6789 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6791 /* Trim away the extraneous references that emerge from nested
6792 use of interface.c (extend_expr). */
6793 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6794 if (class_ref
&& class_ref
->next
)
6796 gfc_free_ref_list (class_ref
->next
);
6797 class_ref
->next
= NULL
;
6799 else if (code
->expr1
->ref
&& !class_ref
)
6801 gfc_free_ref_list (code
->expr1
->ref
);
6802 code
->expr1
->ref
= NULL
;
6805 /* Now use the procedure in the vtable. */
6806 gfc_add_vptr_component (code
->expr1
);
6807 gfc_add_component_ref (code
->expr1
, name
);
6808 code
->expr1
->value
.function
.esym
= NULL
;
6809 if (expr
->expr_type
!= EXPR_VARIABLE
)
6810 code
->expr1
->base_expr
= expr
;
6815 return resolve_typebound_call (code
, NULL
, NULL
);
6817 if (!gfc_resolve_ref (code
->expr1
))
6820 /* Get the CLASS declared type. */
6821 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6823 /* Weed out cases of the ultimate component being a derived type. */
6824 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6825 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6827 gfc_free_ref_list (new_ref
);
6828 return resolve_typebound_call (code
, NULL
, NULL
);
6831 if (!resolve_typebound_call (code
, &name
, &overridable
))
6833 gfc_free_ref_list (new_ref
);
6836 ts
= code
->expr1
->ts
;
6840 /* Convert the expression to a procedure pointer component call. */
6841 code
->expr1
->value
.function
.esym
= NULL
;
6842 code
->expr1
->symtree
= st
;
6845 code
->expr1
->ref
= new_ref
;
6847 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6848 gfc_add_vptr_component (code
->expr1
);
6849 gfc_add_component_ref (code
->expr1
, name
);
6851 /* Recover the typespec for the expression. This is really only
6852 necessary for generic procedures, where the additional call
6853 to gfc_add_component_ref seems to throw the collection of the
6854 correct typespec. */
6855 code
->expr1
->ts
= ts
;
6858 gfc_free_ref_list (new_ref
);
6864 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6867 resolve_ppc_call (gfc_code
* c
)
6869 gfc_component
*comp
;
6871 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6872 gcc_assert (comp
!= NULL
);
6874 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6875 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6877 if (!comp
->attr
.subroutine
)
6878 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6880 if (!gfc_resolve_ref (c
->expr1
))
6883 if (!update_ppc_arglist (c
->expr1
))
6886 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6888 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6889 !(comp
->ts
.interface
6890 && comp
->ts
.interface
->formal
)))
6893 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6896 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6902 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6905 resolve_expr_ppc (gfc_expr
* e
)
6907 gfc_component
*comp
;
6909 comp
= gfc_get_proc_ptr_comp (e
);
6910 gcc_assert (comp
!= NULL
);
6912 /* Convert to EXPR_FUNCTION. */
6913 e
->expr_type
= EXPR_FUNCTION
;
6914 e
->value
.function
.isym
= NULL
;
6915 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6917 if (comp
->as
!= NULL
)
6918 e
->rank
= comp
->as
->rank
;
6920 if (!comp
->attr
.function
)
6921 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6923 if (!gfc_resolve_ref (e
))
6926 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6927 !(comp
->ts
.interface
6928 && comp
->ts
.interface
->formal
)))
6931 if (!update_ppc_arglist (e
))
6934 if (!check_pure_function(e
))
6937 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6944 gfc_is_expandable_expr (gfc_expr
*e
)
6946 gfc_constructor
*con
;
6948 if (e
->expr_type
== EXPR_ARRAY
)
6950 /* Traverse the constructor looking for variables that are flavor
6951 parameter. Parameters must be expanded since they are fully used at
6953 con
= gfc_constructor_first (e
->value
.constructor
);
6954 for (; con
; con
= gfc_constructor_next (con
))
6956 if (con
->expr
->expr_type
== EXPR_VARIABLE
6957 && con
->expr
->symtree
6958 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6959 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6961 if (con
->expr
->expr_type
== EXPR_ARRAY
6962 && gfc_is_expandable_expr (con
->expr
))
6971 /* Sometimes variables in specification expressions of the result
6972 of module procedures in submodules wind up not being the 'real'
6973 dummy. Find this, if possible, in the namespace of the first
6977 fixup_unique_dummy (gfc_expr
*e
)
6979 gfc_symtree
*st
= NULL
;
6980 gfc_symbol
*s
= NULL
;
6982 if (e
->symtree
->n
.sym
->ns
->proc_name
6983 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6984 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6987 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6990 && st
->n
.sym
!= NULL
6991 && st
->n
.sym
->attr
.dummy
)
6995 /* Resolve an expression. That is, make sure that types of operands agree
6996 with their operators, intrinsic operators are converted to function calls
6997 for overloaded types and unresolved function references are resolved. */
7000 gfc_resolve_expr (gfc_expr
*e
)
7003 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
7005 if (e
== NULL
|| e
->do_not_resolve_again
)
7008 /* inquiry_argument only applies to variables. */
7009 inquiry_save
= inquiry_argument
;
7010 actual_arg_save
= actual_arg
;
7011 first_actual_arg_save
= first_actual_arg
;
7013 if (e
->expr_type
!= EXPR_VARIABLE
)
7015 inquiry_argument
= false;
7017 first_actual_arg
= false;
7019 else if (e
->symtree
!= NULL
7020 && *e
->symtree
->name
== '@'
7021 && e
->symtree
->n
.sym
->attr
.dummy
)
7023 /* Deal with submodule specification expressions that are not
7024 found to be referenced in module.c(read_cleanup). */
7025 fixup_unique_dummy (e
);
7028 switch (e
->expr_type
)
7031 t
= resolve_operator (e
);
7037 if (check_host_association (e
))
7038 t
= resolve_function (e
);
7040 t
= resolve_variable (e
);
7042 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
7043 && e
->ref
->type
!= REF_SUBSTRING
)
7044 gfc_resolve_substring_charlen (e
);
7049 t
= resolve_typebound_function (e
);
7052 case EXPR_SUBSTRING
:
7053 t
= gfc_resolve_ref (e
);
7062 t
= resolve_expr_ppc (e
);
7067 if (!gfc_resolve_ref (e
))
7070 t
= gfc_resolve_array_constructor (e
);
7071 /* Also try to expand a constructor. */
7074 gfc_expression_rank (e
);
7075 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7076 gfc_expand_constructor (e
, false);
7079 /* This provides the opportunity for the length of constructors with
7080 character valued function elements to propagate the string length
7081 to the expression. */
7082 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7084 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7085 here rather then add a duplicate test for it above. */
7086 gfc_expand_constructor (e
, false);
7087 t
= gfc_resolve_character_array_constructor (e
);
7092 case EXPR_STRUCTURE
:
7093 t
= gfc_resolve_ref (e
);
7097 t
= resolve_structure_cons (e
, 0);
7101 t
= gfc_simplify_expr (e
, 0);
7105 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7108 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7111 inquiry_argument
= inquiry_save
;
7112 actual_arg
= actual_arg_save
;
7113 first_actual_arg
= first_actual_arg_save
;
7115 /* For some reason, resolving these expressions a second time mangles
7116 the typespec of the expression itself. */
7117 if (t
&& e
->expr_type
== EXPR_VARIABLE
7118 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7119 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7120 e
->do_not_resolve_again
= 1;
7126 /* Resolve an expression from an iterator. They must be scalar and have
7127 INTEGER or (optionally) REAL type. */
7130 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7131 const char *name_msgid
)
7133 if (!gfc_resolve_expr (expr
))
7136 if (expr
->rank
!= 0)
7138 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7142 if (expr
->ts
.type
!= BT_INTEGER
)
7144 if (expr
->ts
.type
== BT_REAL
)
7147 return gfc_notify_std (GFC_STD_F95_DEL
,
7148 "%s at %L must be integer",
7149 _(name_msgid
), &expr
->where
);
7152 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7159 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7167 /* Resolve the expressions in an iterator structure. If REAL_OK is
7168 false allow only INTEGER type iterators, otherwise allow REAL types.
7169 Set own_scope to true for ac-implied-do and data-implied-do as those
7170 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7173 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7175 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7178 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7179 _("iterator variable")))
7182 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7183 "Start expression in DO loop"))
7186 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7187 "End expression in DO loop"))
7190 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7191 "Step expression in DO loop"))
7194 /* Convert start, end, and step to the same type as var. */
7195 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7196 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7197 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7199 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7200 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7201 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7203 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7204 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7205 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7207 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7209 if ((iter
->step
->ts
.type
== BT_INTEGER
7210 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7211 || (iter
->step
->ts
.type
== BT_REAL
7212 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7214 gfc_error ("Step expression in DO loop at %L cannot be zero",
7215 &iter
->step
->where
);
7220 if (iter
->start
->expr_type
== EXPR_CONSTANT
7221 && iter
->end
->expr_type
== EXPR_CONSTANT
7222 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7225 if (iter
->start
->ts
.type
== BT_INTEGER
)
7227 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7228 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7232 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7233 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7235 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7236 gfc_warning (OPT_Wzerotrip
,
7237 "DO loop at %L will be executed zero times",
7238 &iter
->step
->where
);
7241 if (iter
->end
->expr_type
== EXPR_CONSTANT
7242 && iter
->end
->ts
.type
== BT_INTEGER
7243 && iter
->step
->expr_type
== EXPR_CONSTANT
7244 && iter
->step
->ts
.type
== BT_INTEGER
7245 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7246 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7248 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7249 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7251 if (is_step_positive
7252 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7253 gfc_warning (OPT_Wundefined_do_loop
,
7254 "DO loop at %L is undefined as it overflows",
7255 &iter
->step
->where
);
7256 else if (!is_step_positive
7257 && mpz_cmp (iter
->end
->value
.integer
,
7258 gfc_integer_kinds
[k
].min_int
) == 0)
7259 gfc_warning (OPT_Wundefined_do_loop
,
7260 "DO loop at %L is undefined as it underflows",
7261 &iter
->step
->where
);
7268 /* Traversal function for find_forall_index. f == 2 signals that
7269 that variable itself is not to be checked - only the references. */
7272 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7274 if (expr
->expr_type
!= EXPR_VARIABLE
)
7277 /* A scalar assignment */
7278 if (!expr
->ref
|| *f
== 1)
7280 if (expr
->symtree
->n
.sym
== sym
)
7292 /* Check whether the FORALL index appears in the expression or not.
7293 Returns true if SYM is found in EXPR. */
7296 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7298 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7305 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7306 to be a scalar INTEGER variable. The subscripts and stride are scalar
7307 INTEGERs, and if stride is a constant it must be nonzero.
7308 Furthermore "A subscript or stride in a forall-triplet-spec shall
7309 not contain a reference to any index-name in the
7310 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7313 resolve_forall_iterators (gfc_forall_iterator
*it
)
7315 gfc_forall_iterator
*iter
, *iter2
;
7317 for (iter
= it
; iter
; iter
= iter
->next
)
7319 if (gfc_resolve_expr (iter
->var
)
7320 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7321 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7324 if (gfc_resolve_expr (iter
->start
)
7325 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7326 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7327 &iter
->start
->where
);
7328 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7329 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7331 if (gfc_resolve_expr (iter
->end
)
7332 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7333 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7335 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7336 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7338 if (gfc_resolve_expr (iter
->stride
))
7340 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7341 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7342 &iter
->stride
->where
, "INTEGER");
7344 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7345 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7346 gfc_error ("FORALL stride expression at %L cannot be zero",
7347 &iter
->stride
->where
);
7349 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7350 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7353 for (iter
= it
; iter
; iter
= iter
->next
)
7354 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7356 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7357 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7358 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7359 gfc_error ("FORALL index %qs may not appear in triplet "
7360 "specification at %L", iter
->var
->symtree
->name
,
7361 &iter2
->start
->where
);
7366 /* Given a pointer to a symbol that is a derived type, see if it's
7367 inaccessible, i.e. if it's defined in another module and the components are
7368 PRIVATE. The search is recursive if necessary. Returns zero if no
7369 inaccessible components are found, nonzero otherwise. */
7372 derived_inaccessible (gfc_symbol
*sym
)
7376 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7379 for (c
= sym
->components
; c
; c
= c
->next
)
7381 /* Prevent an infinite loop through this function. */
7382 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7383 && sym
== c
->ts
.u
.derived
)
7386 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7394 /* Resolve the argument of a deallocate expression. The expression must be
7395 a pointer or a full array. */
7398 resolve_deallocate_expr (gfc_expr
*e
)
7400 symbol_attribute attr
;
7401 int allocatable
, pointer
;
7407 if (!gfc_resolve_expr (e
))
7410 if (e
->expr_type
!= EXPR_VARIABLE
)
7413 sym
= e
->symtree
->n
.sym
;
7414 unlimited
= UNLIMITED_POLY(sym
);
7416 if (sym
->ts
.type
== BT_CLASS
)
7418 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7419 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7423 allocatable
= sym
->attr
.allocatable
;
7424 pointer
= sym
->attr
.pointer
;
7426 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7431 if (ref
->u
.ar
.type
!= AR_FULL
7432 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7433 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7438 c
= ref
->u
.c
.component
;
7439 if (c
->ts
.type
== BT_CLASS
)
7441 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7442 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7446 allocatable
= c
->attr
.allocatable
;
7447 pointer
= c
->attr
.pointer
;
7458 attr
= gfc_expr_attr (e
);
7460 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7463 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7469 if (gfc_is_coindexed (e
))
7471 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7476 && !gfc_check_vardef_context (e
, true, true, false,
7477 _("DEALLOCATE object")))
7479 if (!gfc_check_vardef_context (e
, false, true, false,
7480 _("DEALLOCATE object")))
7487 /* Returns true if the expression e contains a reference to the symbol sym. */
7489 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7491 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7498 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7500 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7504 /* Given the expression node e for an allocatable/pointer of derived type to be
7505 allocated, get the expression node to be initialized afterwards (needed for
7506 derived types with default initializers, and derived types with allocatable
7507 components that need nullification.) */
7510 gfc_expr_to_initialize (gfc_expr
*e
)
7516 result
= gfc_copy_expr (e
);
7518 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7519 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7520 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7522 if (ref
->u
.ar
.dimen
== 0
7523 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7526 ref
->u
.ar
.type
= AR_FULL
;
7528 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7529 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7534 gfc_free_shape (&result
->shape
, result
->rank
);
7536 /* Recalculate rank, shape, etc. */
7537 gfc_resolve_expr (result
);
7542 /* If the last ref of an expression is an array ref, return a copy of the
7543 expression with that one removed. Otherwise, a copy of the original
7544 expression. This is used for allocate-expressions and pointer assignment
7545 LHS, where there may be an array specification that needs to be stripped
7546 off when using gfc_check_vardef_context. */
7549 remove_last_array_ref (gfc_expr
* e
)
7554 e2
= gfc_copy_expr (e
);
7555 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7556 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7558 gfc_free_ref_list (*r
);
7567 /* Used in resolve_allocate_expr to check that a allocation-object and
7568 a source-expr are conformable. This does not catch all possible
7569 cases; in particular a runtime checking is needed. */
7572 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7575 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7577 /* First compare rank. */
7578 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7579 || (!tail
&& e1
->rank
!= e2
->rank
))
7581 gfc_error ("Source-expr at %L must be scalar or have the "
7582 "same rank as the allocate-object at %L",
7583 &e1
->where
, &e2
->where
);
7594 for (i
= 0; i
< e1
->rank
; i
++)
7596 if (tail
->u
.ar
.start
[i
] == NULL
)
7599 if (tail
->u
.ar
.end
[i
])
7601 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7602 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7603 mpz_add_ui (s
, s
, 1);
7607 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7610 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7612 gfc_error ("Source-expr at %L and allocate-object at %L must "
7613 "have the same shape", &e1
->where
, &e2
->where
);
7626 /* Resolve the expression in an ALLOCATE statement, doing the additional
7627 checks to see whether the expression is OK or not. The expression must
7628 have a trailing array reference that gives the size of the array. */
7631 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7633 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7637 symbol_attribute attr
;
7638 gfc_ref
*ref
, *ref2
;
7641 gfc_symbol
*sym
= NULL
;
7646 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7647 checking of coarrays. */
7648 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7649 if (ref
->next
== NULL
)
7652 if (ref
&& ref
->type
== REF_ARRAY
)
7653 ref
->u
.ar
.in_allocate
= true;
7655 if (!gfc_resolve_expr (e
))
7658 /* Make sure the expression is allocatable or a pointer. If it is
7659 pointer, the next-to-last reference must be a pointer. */
7663 sym
= e
->symtree
->n
.sym
;
7665 /* Check whether ultimate component is abstract and CLASS. */
7668 /* Is the allocate-object unlimited polymorphic? */
7669 unlimited
= UNLIMITED_POLY(e
);
7671 if (e
->expr_type
!= EXPR_VARIABLE
)
7674 attr
= gfc_expr_attr (e
);
7675 pointer
= attr
.pointer
;
7676 dimension
= attr
.dimension
;
7677 codimension
= attr
.codimension
;
7681 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7683 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7684 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7685 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7686 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7687 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7691 allocatable
= sym
->attr
.allocatable
;
7692 pointer
= sym
->attr
.pointer
;
7693 dimension
= sym
->attr
.dimension
;
7694 codimension
= sym
->attr
.codimension
;
7699 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7704 if (ref
->u
.ar
.codimen
> 0)
7707 for (n
= ref
->u
.ar
.dimen
;
7708 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7709 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7716 if (ref
->next
!= NULL
)
7724 gfc_error ("Coindexed allocatable object at %L",
7729 c
= ref
->u
.c
.component
;
7730 if (c
->ts
.type
== BT_CLASS
)
7732 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7733 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7734 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7735 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7736 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7740 allocatable
= c
->attr
.allocatable
;
7741 pointer
= c
->attr
.pointer
;
7742 dimension
= c
->attr
.dimension
;
7743 codimension
= c
->attr
.codimension
;
7744 is_abstract
= c
->attr
.abstract
;
7757 /* Check for F08:C628. */
7758 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7760 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7765 /* Some checks for the SOURCE tag. */
7768 /* Check F03:C631. */
7769 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7771 gfc_error ("Type of entity at %L is type incompatible with "
7772 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7776 /* Check F03:C632 and restriction following Note 6.18. */
7777 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7780 /* Check F03:C633. */
7781 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7783 gfc_error ("The allocate-object at %L and the source-expr at %L "
7784 "shall have the same kind type parameter",
7785 &e
->where
, &code
->expr3
->where
);
7789 /* Check F2008, C642. */
7790 if (code
->expr3
->ts
.type
== BT_DERIVED
7791 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7792 || (code
->expr3
->ts
.u
.derived
->from_intmod
7793 == INTMOD_ISO_FORTRAN_ENV
7794 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7795 == ISOFORTRAN_LOCK_TYPE
)))
7797 gfc_error ("The source-expr at %L shall neither be of type "
7798 "LOCK_TYPE nor have a LOCK_TYPE component if "
7799 "allocate-object at %L is a coarray",
7800 &code
->expr3
->where
, &e
->where
);
7804 /* Check TS18508, C702/C703. */
7805 if (code
->expr3
->ts
.type
== BT_DERIVED
7806 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7807 || (code
->expr3
->ts
.u
.derived
->from_intmod
7808 == INTMOD_ISO_FORTRAN_ENV
7809 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7810 == ISOFORTRAN_EVENT_TYPE
)))
7812 gfc_error ("The source-expr at %L shall neither be of type "
7813 "EVENT_TYPE nor have a EVENT_TYPE component if "
7814 "allocate-object at %L is a coarray",
7815 &code
->expr3
->where
, &e
->where
);
7820 /* Check F08:C629. */
7821 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7824 gcc_assert (e
->ts
.type
== BT_CLASS
);
7825 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7826 "type-spec or source-expr", sym
->name
, &e
->where
);
7830 /* Check F08:C632. */
7831 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7832 && !UNLIMITED_POLY (e
))
7836 if (!e
->ts
.u
.cl
->length
)
7839 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7840 code
->ext
.alloc
.ts
.u
.cl
->length
);
7841 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7843 gfc_error ("Allocating %s at %L with type-spec requires the same "
7844 "character-length parameter as in the declaration",
7845 sym
->name
, &e
->where
);
7850 /* In the variable definition context checks, gfc_expr_attr is used
7851 on the expression. This is fooled by the array specification
7852 present in e, thus we have to eliminate that one temporarily. */
7853 e2
= remove_last_array_ref (e
);
7856 t
= gfc_check_vardef_context (e2
, true, true, false,
7857 _("ALLOCATE object"));
7859 t
= gfc_check_vardef_context (e2
, false, true, false,
7860 _("ALLOCATE object"));
7865 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7866 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7868 /* For class arrays, the initialization with SOURCE is done
7869 using _copy and trans_call. It is convenient to exploit that
7870 when the allocated type is different from the declared type but
7871 no SOURCE exists by setting expr3. */
7872 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7874 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7875 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7876 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7878 /* We have to zero initialize the integer variable. */
7879 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7882 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7884 /* Make sure the vtab symbol is present when
7885 the module variables are generated. */
7886 gfc_typespec ts
= e
->ts
;
7888 ts
= code
->expr3
->ts
;
7889 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7890 ts
= code
->ext
.alloc
.ts
;
7892 /* Finding the vtab also publishes the type's symbol. Therefore this
7893 statement is necessary. */
7894 gfc_find_derived_vtab (ts
.u
.derived
);
7896 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7898 /* Again, make sure the vtab symbol is present when
7899 the module variables are generated. */
7900 gfc_typespec
*ts
= NULL
;
7902 ts
= &code
->expr3
->ts
;
7904 ts
= &code
->ext
.alloc
.ts
;
7908 /* Finding the vtab also publishes the type's symbol. Therefore this
7909 statement is necessary. */
7913 if (dimension
== 0 && codimension
== 0)
7916 /* Make sure the last reference node is an array specification. */
7918 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7919 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7924 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7925 "in ALLOCATE statement at %L", &e
->where
))
7927 if (code
->expr3
->rank
!= 0)
7928 *array_alloc_wo_spec
= true;
7931 gfc_error ("Array specification or array-valued SOURCE= "
7932 "expression required in ALLOCATE statement at %L",
7939 gfc_error ("Array specification required in ALLOCATE statement "
7940 "at %L", &e
->where
);
7945 /* Make sure that the array section reference makes sense in the
7946 context of an ALLOCATE specification. */
7951 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7953 switch (ar
->dimen_type
[i
])
7955 case DIMEN_THIS_IMAGE
:
7956 gfc_error ("Coarray specification required in ALLOCATE statement "
7957 "at %L", &e
->where
);
7961 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7963 /* If ar->stride[i] is NULL, we issued a previous error. */
7964 if (ar
->stride
[i
] == NULL
)
7965 gfc_error ("Bad array specification in ALLOCATE statement "
7966 "at %L", &e
->where
);
7969 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7971 gfc_error ("Upper cobound is less than lower cobound at %L",
7972 &ar
->start
[i
]->where
);
7978 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7980 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7981 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7983 gfc_error ("Upper cobound is less than lower cobound "
7984 "of 1 at %L", &ar
->start
[i
]->where
);
7994 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8000 for (i
= 0; i
< ar
->dimen
; i
++)
8002 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
8005 switch (ar
->dimen_type
[i
])
8011 if (ar
->start
[i
] != NULL
8012 && ar
->end
[i
] != NULL
8013 && ar
->stride
[i
] == NULL
)
8021 case DIMEN_THIS_IMAGE
:
8022 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8028 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8030 sym
= a
->expr
->symtree
->n
.sym
;
8032 /* TODO - check derived type components. */
8033 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
8036 if ((ar
->start
[i
] != NULL
8037 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
8038 || (ar
->end
[i
] != NULL
8039 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
8041 gfc_error ("%qs must not appear in the array specification at "
8042 "%L in the same ALLOCATE statement where it is "
8043 "itself allocated", sym
->name
, &ar
->where
);
8049 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
8051 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
8052 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
8054 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
8056 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
8057 "statement at %L", &e
->where
);
8063 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
8064 && ar
->stride
[i
] == NULL
)
8067 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8081 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8083 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8084 gfc_alloc
*a
, *p
, *q
;
8087 errmsg
= code
->expr2
;
8089 /* Check the stat variable. */
8092 gfc_check_vardef_context (stat
, false, false, false,
8093 _("STAT variable"));
8095 if ((stat
->ts
.type
!= BT_INTEGER
8096 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8097 || stat
->ref
->type
== REF_COMPONENT
)))
8099 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8100 "variable", &stat
->where
);
8102 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8103 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8105 gfc_ref
*ref1
, *ref2
;
8108 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8109 ref1
= ref1
->next
, ref2
= ref2
->next
)
8111 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8113 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8122 gfc_error ("Stat-variable at %L shall not be %sd within "
8123 "the same %s statement", &stat
->where
, fcn
, fcn
);
8129 /* Check the errmsg variable. */
8133 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8136 gfc_check_vardef_context (errmsg
, false, false, false,
8137 _("ERRMSG variable"));
8139 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8140 F18:R930 errmsg-variable is scalar-default-char-variable
8141 F18:R906 default-char-variable is variable
8142 F18:C906 default-char-variable shall be default character. */
8143 if ((errmsg
->ts
.type
!= BT_CHARACTER
8145 && (errmsg
->ref
->type
== REF_ARRAY
8146 || errmsg
->ref
->type
== REF_COMPONENT
)))
8148 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8149 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8150 "variable", &errmsg
->where
);
8152 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8153 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8155 gfc_ref
*ref1
, *ref2
;
8158 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8159 ref1
= ref1
->next
, ref2
= ref2
->next
)
8161 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8163 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8172 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8173 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8179 /* Check that an allocate-object appears only once in the statement. */
8181 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8184 for (q
= p
->next
; q
; q
= q
->next
)
8187 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8189 /* This is a potential collision. */
8190 gfc_ref
*pr
= pe
->ref
;
8191 gfc_ref
*qr
= qe
->ref
;
8193 /* Follow the references until
8194 a) They start to differ, in which case there is no error;
8195 you can deallocate a%b and a%c in a single statement
8196 b) Both of them stop, which is an error
8197 c) One of them stops, which is also an error. */
8200 if (pr
== NULL
&& qr
== NULL
)
8202 gfc_error ("Allocate-object at %L also appears at %L",
8203 &pe
->where
, &qe
->where
);
8206 else if (pr
!= NULL
&& qr
== NULL
)
8208 gfc_error ("Allocate-object at %L is subobject of"
8209 " object at %L", &pe
->where
, &qe
->where
);
8212 else if (pr
== NULL
&& qr
!= NULL
)
8214 gfc_error ("Allocate-object at %L is subobject of"
8215 " object at %L", &qe
->where
, &pe
->where
);
8218 /* Here, pr != NULL && qr != NULL */
8219 gcc_assert(pr
->type
== qr
->type
);
8220 if (pr
->type
== REF_ARRAY
)
8222 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8224 gcc_assert (qr
->type
== REF_ARRAY
);
8226 if (pr
->next
&& qr
->next
)
8229 gfc_array_ref
*par
= &(pr
->u
.ar
);
8230 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8232 for (i
=0; i
<par
->dimen
; i
++)
8234 if ((par
->start
[i
] != NULL
8235 || qar
->start
[i
] != NULL
)
8236 && gfc_dep_compare_expr (par
->start
[i
],
8237 qar
->start
[i
]) != 0)
8244 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8257 if (strcmp (fcn
, "ALLOCATE") == 0)
8259 bool arr_alloc_wo_spec
= false;
8261 /* Resolving the expr3 in the loop over all objects to allocate would
8262 execute loop invariant code for each loop item. Therefore do it just
8264 if (code
->expr3
&& code
->expr3
->mold
8265 && code
->expr3
->ts
.type
== BT_DERIVED
)
8267 /* Default initialization via MOLD (non-polymorphic). */
8268 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8271 gfc_resolve_expr (rhs
);
8272 gfc_free_expr (code
->expr3
);
8276 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8277 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8279 if (arr_alloc_wo_spec
&& code
->expr3
)
8281 /* Mark the allocate to have to take the array specification
8283 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8288 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8289 resolve_deallocate_expr (a
->expr
);
8294 /************ SELECT CASE resolution subroutines ************/
8296 /* Callback function for our mergesort variant. Determines interval
8297 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8298 op1 > op2. Assumes we're not dealing with the default case.
8299 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8300 There are nine situations to check. */
8303 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8307 if (op1
->low
== NULL
) /* op1 = (:L) */
8309 /* op2 = (:N), so overlap. */
8311 /* op2 = (M:) or (M:N), L < M */
8312 if (op2
->low
!= NULL
8313 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8316 else if (op1
->high
== NULL
) /* op1 = (K:) */
8318 /* op2 = (M:), so overlap. */
8320 /* op2 = (:N) or (M:N), K > N */
8321 if (op2
->high
!= NULL
8322 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8325 else /* op1 = (K:L) */
8327 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8328 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8330 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8331 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8333 else /* op2 = (M:N) */
8337 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8340 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8349 /* Merge-sort a double linked case list, detecting overlap in the
8350 process. LIST is the head of the double linked case list before it
8351 is sorted. Returns the head of the sorted list if we don't see any
8352 overlap, or NULL otherwise. */
8355 check_case_overlap (gfc_case
*list
)
8357 gfc_case
*p
, *q
, *e
, *tail
;
8358 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8360 /* If the passed list was empty, return immediately. */
8367 /* Loop unconditionally. The only exit from this loop is a return
8368 statement, when we've finished sorting the case list. */
8375 /* Count the number of merges we do in this pass. */
8378 /* Loop while there exists a merge to be done. */
8383 /* Count this merge. */
8386 /* Cut the list in two pieces by stepping INSIZE places
8387 forward in the list, starting from P. */
8390 for (i
= 0; i
< insize
; i
++)
8399 /* Now we have two lists. Merge them! */
8400 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8402 /* See from which the next case to merge comes from. */
8405 /* P is empty so the next case must come from Q. */
8410 else if (qsize
== 0 || q
== NULL
)
8419 cmp
= compare_cases (p
, q
);
8422 /* The whole case range for P is less than the
8430 /* The whole case range for Q is greater than
8431 the case range for P. */
8438 /* The cases overlap, or they are the same
8439 element in the list. Either way, we must
8440 issue an error and get the next case from P. */
8441 /* FIXME: Sort P and Q by line number. */
8442 gfc_error ("CASE label at %L overlaps with CASE "
8443 "label at %L", &p
->where
, &q
->where
);
8451 /* Add the next element to the merged list. */
8460 /* P has now stepped INSIZE places along, and so has Q. So
8461 they're the same. */
8466 /* If we have done only one merge or none at all, we've
8467 finished sorting the cases. */
8476 /* Otherwise repeat, merging lists twice the size. */
8482 /* Check to see if an expression is suitable for use in a CASE statement.
8483 Makes sure that all case expressions are scalar constants of the same
8484 type. Return false if anything is wrong. */
8487 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8489 if (e
== NULL
) return true;
8491 if (e
->ts
.type
!= case_expr
->ts
.type
)
8493 gfc_error ("Expression in CASE statement at %L must be of type %s",
8494 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8498 /* C805 (R808) For a given case-construct, each case-value shall be of
8499 the same type as case-expr. For character type, length differences
8500 are allowed, but the kind type parameters shall be the same. */
8502 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8504 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8505 &e
->where
, case_expr
->ts
.kind
);
8509 /* Convert the case value kind to that of case expression kind,
8512 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8513 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8517 gfc_error ("Expression in CASE statement at %L must be scalar",
8526 /* Given a completely parsed select statement, we:
8528 - Validate all expressions and code within the SELECT.
8529 - Make sure that the selection expression is not of the wrong type.
8530 - Make sure that no case ranges overlap.
8531 - Eliminate unreachable cases and unreachable code resulting from
8532 removing case labels.
8534 The standard does allow unreachable cases, e.g. CASE (5:3). But
8535 they are a hassle for code generation, and to prevent that, we just
8536 cut them out here. This is not necessary for overlapping cases
8537 because they are illegal and we never even try to generate code.
8539 We have the additional caveat that a SELECT construct could have
8540 been a computed GOTO in the source code. Fortunately we can fairly
8541 easily work around that here: The case_expr for a "real" SELECT CASE
8542 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8543 we have to do is make sure that the case_expr is a scalar integer
8547 resolve_select (gfc_code
*code
, bool select_type
)
8550 gfc_expr
*case_expr
;
8551 gfc_case
*cp
, *default_case
, *tail
, *head
;
8552 int seen_unreachable
;
8558 if (code
->expr1
== NULL
)
8560 /* This was actually a computed GOTO statement. */
8561 case_expr
= code
->expr2
;
8562 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8563 gfc_error ("Selection expression in computed GOTO statement "
8564 "at %L must be a scalar integer expression",
8567 /* Further checking is not necessary because this SELECT was built
8568 by the compiler, so it should always be OK. Just move the
8569 case_expr from expr2 to expr so that we can handle computed
8570 GOTOs as normal SELECTs from here on. */
8571 code
->expr1
= code
->expr2
;
8576 case_expr
= code
->expr1
;
8577 type
= case_expr
->ts
.type
;
8580 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8582 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8583 &case_expr
->where
, gfc_typename (case_expr
));
8585 /* Punt. Going on here just produce more garbage error messages. */
8590 if (!select_type
&& case_expr
->rank
!= 0)
8592 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8593 "expression", &case_expr
->where
);
8599 /* Raise a warning if an INTEGER case value exceeds the range of
8600 the case-expr. Later, all expressions will be promoted to the
8601 largest kind of all case-labels. */
8603 if (type
== BT_INTEGER
)
8604 for (body
= code
->block
; body
; body
= body
->block
)
8605 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8608 && gfc_check_integer_range (cp
->low
->value
.integer
,
8609 case_expr
->ts
.kind
) != ARITH_OK
)
8610 gfc_warning (0, "Expression in CASE statement at %L is "
8611 "not in the range of %s", &cp
->low
->where
,
8612 gfc_typename (case_expr
));
8615 && cp
->low
!= cp
->high
8616 && gfc_check_integer_range (cp
->high
->value
.integer
,
8617 case_expr
->ts
.kind
) != ARITH_OK
)
8618 gfc_warning (0, "Expression in CASE statement at %L is "
8619 "not in the range of %s", &cp
->high
->where
,
8620 gfc_typename (case_expr
));
8623 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8624 of the SELECT CASE expression and its CASE values. Walk the lists
8625 of case values, and if we find a mismatch, promote case_expr to
8626 the appropriate kind. */
8628 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8630 for (body
= code
->block
; body
; body
= body
->block
)
8632 /* Walk the case label list. */
8633 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8635 /* Intercept the DEFAULT case. It does not have a kind. */
8636 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8639 /* Unreachable case ranges are discarded, so ignore. */
8640 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8641 && cp
->low
!= cp
->high
8642 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8646 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8647 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8649 if (cp
->high
!= NULL
8650 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8651 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8656 /* Assume there is no DEFAULT case. */
8657 default_case
= NULL
;
8662 for (body
= code
->block
; body
; body
= body
->block
)
8664 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8666 seen_unreachable
= 0;
8668 /* Walk the case label list, making sure that all case labels
8670 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8672 /* Count the number of cases in the whole construct. */
8675 /* Intercept the DEFAULT case. */
8676 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8678 if (default_case
!= NULL
)
8680 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8681 "by a second DEFAULT CASE at %L",
8682 &default_case
->where
, &cp
->where
);
8693 /* Deal with single value cases and case ranges. Errors are
8694 issued from the validation function. */
8695 if (!validate_case_label_expr (cp
->low
, case_expr
)
8696 || !validate_case_label_expr (cp
->high
, case_expr
))
8702 if (type
== BT_LOGICAL
8703 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8704 || cp
->low
!= cp
->high
))
8706 gfc_error ("Logical range in CASE statement at %L is not "
8707 "allowed", &cp
->low
->where
);
8712 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8715 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8716 if (value
& seen_logical
)
8718 gfc_error ("Constant logical value in CASE statement "
8719 "is repeated at %L",
8724 seen_logical
|= value
;
8727 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8728 && cp
->low
!= cp
->high
8729 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8731 if (warn_surprising
)
8732 gfc_warning (OPT_Wsurprising
,
8733 "Range specification at %L can never be matched",
8736 cp
->unreachable
= 1;
8737 seen_unreachable
= 1;
8741 /* If the case range can be matched, it can also overlap with
8742 other cases. To make sure it does not, we put it in a
8743 double linked list here. We sort that with a merge sort
8744 later on to detect any overlapping cases. */
8748 head
->right
= head
->left
= NULL
;
8753 tail
->right
->left
= tail
;
8760 /* It there was a failure in the previous case label, give up
8761 for this case label list. Continue with the next block. */
8765 /* See if any case labels that are unreachable have been seen.
8766 If so, we eliminate them. This is a bit of a kludge because
8767 the case lists for a single case statement (label) is a
8768 single forward linked lists. */
8769 if (seen_unreachable
)
8771 /* Advance until the first case in the list is reachable. */
8772 while (body
->ext
.block
.case_list
!= NULL
8773 && body
->ext
.block
.case_list
->unreachable
)
8775 gfc_case
*n
= body
->ext
.block
.case_list
;
8776 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8778 gfc_free_case_list (n
);
8781 /* Strip all other unreachable cases. */
8782 if (body
->ext
.block
.case_list
)
8784 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8786 if (cp
->next
->unreachable
)
8788 gfc_case
*n
= cp
->next
;
8789 cp
->next
= cp
->next
->next
;
8791 gfc_free_case_list (n
);
8798 /* See if there were overlapping cases. If the check returns NULL,
8799 there was overlap. In that case we don't do anything. If head
8800 is non-NULL, we prepend the DEFAULT case. The sorted list can
8801 then used during code generation for SELECT CASE constructs with
8802 a case expression of a CHARACTER type. */
8805 head
= check_case_overlap (head
);
8807 /* Prepend the default_case if it is there. */
8808 if (head
!= NULL
&& default_case
)
8810 default_case
->left
= NULL
;
8811 default_case
->right
= head
;
8812 head
->left
= default_case
;
8816 /* Eliminate dead blocks that may be the result if we've seen
8817 unreachable case labels for a block. */
8818 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8820 if (body
->block
->ext
.block
.case_list
== NULL
)
8822 /* Cut the unreachable block from the code chain. */
8823 gfc_code
*c
= body
->block
;
8824 body
->block
= c
->block
;
8826 /* Kill the dead block, but not the blocks below it. */
8828 gfc_free_statements (c
);
8832 /* More than two cases is legal but insane for logical selects.
8833 Issue a warning for it. */
8834 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8835 gfc_warning (OPT_Wsurprising
,
8836 "Logical SELECT CASE block at %L has more that two cases",
8841 /* Check if a derived type is extensible. */
8844 gfc_type_is_extensible (gfc_symbol
*sym
)
8846 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8847 || (sym
->attr
.is_class
8848 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8853 resolve_types (gfc_namespace
*ns
);
8855 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8856 correct as well as possibly the array-spec. */
8859 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8863 gcc_assert (sym
->assoc
);
8864 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8866 /* If this is for SELECT TYPE, the target may not yet be set. In that
8867 case, return. Resolution will be called later manually again when
8869 target
= sym
->assoc
->target
;
8872 gcc_assert (!sym
->assoc
->dangling
);
8874 if (resolve_target
&& !gfc_resolve_expr (target
))
8877 /* For variable targets, we get some attributes from the target. */
8878 if (target
->expr_type
== EXPR_VARIABLE
)
8880 gfc_symbol
*tsym
, *dsym
;
8882 gcc_assert (target
->symtree
);
8883 tsym
= target
->symtree
->n
.sym
;
8885 if (gfc_expr_attr (target
).proc_pointer
)
8887 gfc_error ("Associating entity %qs at %L is a procedure pointer",
8888 tsym
->name
, &target
->where
);
8892 if (tsym
->attr
.flavor
== FL_PROCEDURE
&& tsym
->generic
8893 && (dsym
= gfc_find_dt_in_generic (tsym
)) != NULL
8894 && dsym
->attr
.flavor
== FL_DERIVED
)
8896 gfc_error ("Derived type %qs cannot be used as a variable at %L",
8897 tsym
->name
, &target
->where
);
8901 if (tsym
->attr
.flavor
== FL_PROCEDURE
)
8903 bool is_error
= true;
8904 if (tsym
->attr
.function
&& tsym
->result
== tsym
)
8905 for (gfc_namespace
*ns
= sym
->ns
; ns
; ns
= ns
->parent
)
8906 if (tsym
== ns
->proc_name
)
8913 gfc_error ("Associating entity %qs at %L is a procedure name",
8914 tsym
->name
, &target
->where
);
8919 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8920 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8922 sym
->attr
.target
= tsym
->attr
.target
8923 || gfc_expr_attr (target
).pointer
;
8924 if (is_subref_array (target
))
8925 sym
->attr
.subref_array_pointer
= 1;
8927 else if (target
->ts
.type
== BT_PROCEDURE
)
8929 gfc_error ("Associating selector-expression at %L yields a procedure",
8934 if (target
->expr_type
== EXPR_NULL
)
8936 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8939 else if (target
->ts
.type
== BT_UNKNOWN
)
8941 gfc_error ("Selector at %L has no type", &target
->where
);
8945 /* Get type if this was not already set. Note that it can be
8946 some other type than the target in case this is a SELECT TYPE
8947 selector! So we must not update when the type is already there. */
8948 if (sym
->ts
.type
== BT_UNKNOWN
)
8949 sym
->ts
= target
->ts
;
8951 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8953 /* See if this is a valid association-to-variable. */
8954 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8955 && !gfc_has_vector_subscript (target
));
8957 /* Finally resolve if this is an array or not. */
8958 if (sym
->attr
.dimension
&& target
->rank
== 0)
8960 /* primary.c makes the assumption that a reference to an associate
8961 name followed by a left parenthesis is an array reference. */
8962 if (sym
->ts
.type
!= BT_CHARACTER
)
8963 gfc_error ("Associate-name %qs at %L is used as array",
8964 sym
->name
, &sym
->declared_at
);
8965 sym
->attr
.dimension
= 0;
8970 /* We cannot deal with class selectors that need temporaries. */
8971 if (target
->ts
.type
== BT_CLASS
8972 && gfc_ref_needs_temporary_p (target
->ref
))
8974 gfc_error ("CLASS selector at %L needs a temporary which is not "
8975 "yet implemented", &target
->where
);
8979 if (target
->ts
.type
== BT_CLASS
)
8980 gfc_fix_class_refs (target
);
8982 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8985 /* The rank may be incorrectly guessed at parsing, therefore make sure
8986 it is corrected now. */
8987 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8990 sym
->as
= gfc_get_array_spec ();
8992 as
->rank
= target
->rank
;
8993 as
->type
= AS_DEFERRED
;
8994 as
->corank
= gfc_get_corank (target
);
8995 sym
->attr
.dimension
= 1;
8996 if (as
->corank
!= 0)
8997 sym
->attr
.codimension
= 1;
8999 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
9001 if (!CLASS_DATA (sym
)->as
)
9002 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
9003 as
= CLASS_DATA (sym
)->as
;
9004 as
->rank
= target
->rank
;
9005 as
->type
= AS_DEFERRED
;
9006 as
->corank
= gfc_get_corank (target
);
9007 CLASS_DATA (sym
)->attr
.dimension
= 1;
9008 if (as
->corank
!= 0)
9009 CLASS_DATA (sym
)->attr
.codimension
= 1;
9012 else if (!sym
->attr
.select_rank_temporary
)
9014 /* target's rank is 0, but the type of the sym is still array valued,
9015 which has to be corrected. */
9016 if (sym
->ts
.type
== BT_CLASS
9017 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
9020 symbol_attribute attr
;
9021 /* The associated variable's type is still the array type
9022 correct this now. */
9023 gfc_typespec
*ts
= &target
->ts
;
9026 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
9031 ts
= &ref
->u
.c
.component
->ts
;
9034 if (ts
->type
== BT_CLASS
)
9035 ts
= &ts
->u
.derived
->components
->ts
;
9041 /* Create a scalar instance of the current class type. Because the
9042 rank of a class array goes into its name, the type has to be
9043 rebuild. The alternative of (re-)setting just the attributes
9044 and as in the current type, destroys the type also in other
9048 sym
->ts
.type
= BT_CLASS
;
9049 attr
= CLASS_DATA (sym
)->attr
;
9051 attr
.associate_var
= 1;
9052 attr
.dimension
= attr
.codimension
= 0;
9053 attr
.class_pointer
= 1;
9054 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
9056 /* Make sure the _vptr is set. */
9057 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
9058 if (c
->ts
.u
.derived
== NULL
)
9059 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
9060 CLASS_DATA (sym
)->attr
.pointer
= 1;
9061 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
9062 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
9063 gfc_commit_symbol (sym
->ts
.u
.derived
);
9064 /* _vptr now has the _vtab in it, change it to the _vtype. */
9065 if (c
->ts
.u
.derived
->attr
.vtab
)
9066 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
9067 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
9068 resolve_types (c
->ts
.u
.derived
->ns
);
9072 /* Mark this as an associate variable. */
9073 sym
->attr
.associate_var
= 1;
9075 /* Fix up the type-spec for CHARACTER types. */
9076 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9079 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9081 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9082 && target
->symtree
->n
.sym
->attr
.dummy
9083 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9085 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9086 sym
->ts
.deferred
= 1;
9089 if (!sym
->ts
.u
.cl
->length
9090 && !sym
->ts
.deferred
9091 && target
->expr_type
== EXPR_CONSTANT
)
9093 sym
->ts
.u
.cl
->length
=
9094 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9095 target
->value
.character
.length
);
9097 else if ((!sym
->ts
.u
.cl
->length
9098 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9099 && target
->expr_type
!= EXPR_VARIABLE
)
9101 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9102 sym
->ts
.deferred
= 1;
9104 /* This is reset in trans-stmt.c after the assignment
9105 of the target expression to the associate name. */
9106 sym
->attr
.allocatable
= 1;
9110 /* If the target is a good class object, so is the associate variable. */
9111 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9112 sym
->attr
.class_ok
= 1;
9116 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9117 array reference, where necessary. The symbols are artificial and so
9118 the dimension attribute and arrayspec can also be set. In addition,
9119 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9120 This is corrected here as well.*/
9123 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9124 int rank
, gfc_ref
*ref
)
9126 gfc_ref
*nref
= (*expr1
)->ref
;
9127 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9128 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9129 (*expr1
)->rank
= rank
;
9130 if (sym1
->ts
.type
== BT_CLASS
)
9132 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9133 (*expr1
)->ts
= sym1
->ts
;
9135 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9136 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9137 CLASS_DATA (sym1
)->as
9138 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9142 sym1
->attr
.dimension
= 1;
9143 if (sym1
->as
== NULL
&& sym2
)
9144 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9147 for (; nref
; nref
= nref
->next
)
9148 if (nref
->next
== NULL
)
9151 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9152 nref
->next
= gfc_copy_ref (ref
);
9153 else if (ref
&& !nref
)
9154 (*expr1
)->ref
= gfc_copy_ref (ref
);
9159 build_loc_call (gfc_expr
*sym_expr
)
9162 loc_call
= gfc_get_expr ();
9163 loc_call
->expr_type
= EXPR_FUNCTION
;
9164 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9165 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9166 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9167 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9168 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9169 loc_call
->ts
.type
= BT_INTEGER
;
9170 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9171 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9172 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9173 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9174 loc_call
->where
= sym_expr
->where
;
9178 /* Resolve a SELECT TYPE statement. */
9181 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9183 gfc_symbol
*selector_type
;
9184 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9185 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9188 char name
[GFC_MAX_SYMBOL_LEN
];
9192 gfc_ref
* ref
= NULL
;
9193 gfc_expr
*selector_expr
= NULL
;
9195 ns
= code
->ext
.block
.ns
;
9198 /* Check for F03:C813. */
9199 if (code
->expr1
->ts
.type
!= BT_CLASS
9200 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9202 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9203 "at %L", &code
->loc
);
9207 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9212 gfc_ref
*ref2
= NULL
;
9213 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9214 if (ref
->type
== REF_COMPONENT
9215 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9220 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9221 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9222 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9226 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9227 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9228 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9231 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9232 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9234 /* F2008: C803 The selector expression must not be coindexed. */
9235 if (gfc_is_coindexed (code
->expr2
))
9237 gfc_error ("Selector at %L must not be coindexed",
9238 &code
->expr2
->where
);
9245 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9247 if (gfc_is_coindexed (code
->expr1
))
9249 gfc_error ("Selector at %L must not be coindexed",
9250 &code
->expr1
->where
);
9255 /* Loop over TYPE IS / CLASS IS cases. */
9256 for (body
= code
->block
; body
; body
= body
->block
)
9258 c
= body
->ext
.block
.case_list
;
9262 /* Check for repeated cases. */
9263 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9265 gfc_case
*d
= tail
->ext
.block
.case_list
;
9269 if (c
->ts
.type
== d
->ts
.type
9270 && ((c
->ts
.type
== BT_DERIVED
9271 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9272 && !strcmp (c
->ts
.u
.derived
->name
,
9273 d
->ts
.u
.derived
->name
))
9274 || c
->ts
.type
== BT_UNKNOWN
9275 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9276 && c
->ts
.kind
== d
->ts
.kind
)))
9278 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9279 &c
->where
, &d
->where
);
9285 /* Check F03:C815. */
9286 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9287 && !selector_type
->attr
.unlimited_polymorphic
9288 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9290 gfc_error ("Derived type %qs at %L must be extensible",
9291 c
->ts
.u
.derived
->name
, &c
->where
);
9296 /* Check F03:C816. */
9297 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9298 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9299 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9301 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9302 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9303 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9305 gfc_error ("Unexpected intrinsic type %qs at %L",
9306 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9311 /* Check F03:C814. */
9312 if (c
->ts
.type
== BT_CHARACTER
9313 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9315 gfc_error ("The type-spec at %L shall specify that each length "
9316 "type parameter is assumed", &c
->where
);
9321 /* Intercept the DEFAULT case. */
9322 if (c
->ts
.type
== BT_UNKNOWN
)
9324 /* Check F03:C818. */
9327 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9328 "by a second DEFAULT CASE at %L",
9329 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9334 default_case
= body
;
9341 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9342 target if present. If there are any EXIT statements referring to the
9343 SELECT TYPE construct, this is no problem because the gfc_code
9344 reference stays the same and EXIT is equally possible from the BLOCK
9345 it is changed to. */
9346 code
->op
= EXEC_BLOCK
;
9349 gfc_association_list
* assoc
;
9351 assoc
= gfc_get_association_list ();
9352 assoc
->st
= code
->expr1
->symtree
;
9353 assoc
->target
= gfc_copy_expr (code
->expr2
);
9354 assoc
->target
->where
= code
->expr2
->where
;
9355 /* assoc->variable will be set by resolve_assoc_var. */
9357 code
->ext
.block
.assoc
= assoc
;
9358 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9360 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9363 code
->ext
.block
.assoc
= NULL
;
9365 /* Ensure that the selector rank and arrayspec are available to
9366 correct expressions in which they might be missing. */
9367 if (code
->expr2
&& code
->expr2
->rank
)
9369 rank
= code
->expr2
->rank
;
9370 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9371 if (ref
->next
== NULL
)
9373 if (ref
&& ref
->type
== REF_ARRAY
)
9374 ref
= gfc_copy_ref (ref
);
9376 /* Fixup expr1 if necessary. */
9378 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9380 else if (code
->expr1
->rank
)
9382 rank
= code
->expr1
->rank
;
9383 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9384 if (ref
->next
== NULL
)
9386 if (ref
&& ref
->type
== REF_ARRAY
)
9387 ref
= gfc_copy_ref (ref
);
9390 /* Add EXEC_SELECT to switch on type. */
9391 new_st
= gfc_get_code (code
->op
);
9392 new_st
->expr1
= code
->expr1
;
9393 new_st
->expr2
= code
->expr2
;
9394 new_st
->block
= code
->block
;
9395 code
->expr1
= code
->expr2
= NULL
;
9400 ns
->code
->next
= new_st
;
9402 code
->op
= EXEC_SELECT_TYPE
;
9404 /* Use the intrinsic LOC function to generate an integer expression
9405 for the vtable of the selector. Note that the rank of the selector
9406 expression has to be set to zero. */
9407 gfc_add_vptr_component (code
->expr1
);
9408 code
->expr1
->rank
= 0;
9409 code
->expr1
= build_loc_call (code
->expr1
);
9410 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9412 /* Loop over TYPE IS / CLASS IS cases. */
9413 for (body
= code
->block
; body
; body
= body
->block
)
9417 c
= body
->ext
.block
.case_list
;
9419 /* Generate an index integer expression for address of the
9420 TYPE/CLASS vtable and store it in c->low. The hash expression
9421 is stored in c->high and is used to resolve intrinsic cases. */
9422 if (c
->ts
.type
!= BT_UNKNOWN
)
9424 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9426 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9428 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9429 c
->ts
.u
.derived
->hash_value
);
9433 vtab
= gfc_find_vtab (&c
->ts
);
9434 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9435 e
= CLASS_DATA (vtab
)->initializer
;
9436 c
->high
= gfc_copy_expr (e
);
9437 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9440 ts
.kind
= gfc_integer_4_kind
;
9441 ts
.type
= BT_INTEGER
;
9442 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9446 e
= gfc_lval_expr_from_sym (vtab
);
9447 c
->low
= build_loc_call (e
);
9452 /* Associate temporary to selector. This should only be done
9453 when this case is actually true, so build a new ASSOCIATE
9454 that does precisely this here (instead of using the
9457 if (c
->ts
.type
== BT_CLASS
)
9458 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9459 else if (c
->ts
.type
== BT_DERIVED
)
9460 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9461 else if (c
->ts
.type
== BT_CHARACTER
)
9463 HOST_WIDE_INT charlen
= 0;
9464 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9465 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9466 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9467 snprintf (name
, sizeof (name
),
9468 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9469 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9472 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9475 st
= gfc_find_symtree (ns
->sym_root
, name
);
9476 gcc_assert (st
->n
.sym
->assoc
);
9477 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9478 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9479 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9481 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9482 /* Fixup the target expression if necessary. */
9484 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9487 new_st
= gfc_get_code (EXEC_BLOCK
);
9488 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9489 new_st
->ext
.block
.ns
->code
= body
->next
;
9490 body
->next
= new_st
;
9492 /* Chain in the new list only if it is marked as dangling. Otherwise
9493 there is a CASE label overlap and this is already used. Just ignore,
9494 the error is diagnosed elsewhere. */
9495 if (st
->n
.sym
->assoc
->dangling
)
9497 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9498 st
->n
.sym
->assoc
->dangling
= 0;
9501 resolve_assoc_var (st
->n
.sym
, false);
9504 /* Take out CLASS IS cases for separate treatment. */
9506 while (body
&& body
->block
)
9508 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9510 /* Add to class_is list. */
9511 if (class_is
== NULL
)
9513 class_is
= body
->block
;
9518 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9519 tail
->block
= body
->block
;
9522 /* Remove from EXEC_SELECT list. */
9523 body
->block
= body
->block
->block
;
9536 /* Add a default case to hold the CLASS IS cases. */
9537 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9538 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9540 tail
->ext
.block
.case_list
= gfc_get_case ();
9541 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9543 default_case
= tail
;
9546 /* More than one CLASS IS block? */
9547 if (class_is
->block
)
9551 /* Sort CLASS IS blocks by extension level. */
9555 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9558 /* F03:C817 (check for doubles). */
9559 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9560 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9562 gfc_error ("Double CLASS IS block in SELECT TYPE "
9564 &c2
->ext
.block
.case_list
->where
);
9567 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9568 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9571 (*c1
)->block
= c2
->block
;
9581 /* Generate IF chain. */
9582 if_st
= gfc_get_code (EXEC_IF
);
9584 for (body
= class_is
; body
; body
= body
->block
)
9586 new_st
->block
= gfc_get_code (EXEC_IF
);
9587 new_st
= new_st
->block
;
9588 /* Set up IF condition: Call _gfortran_is_extension_of. */
9589 new_st
->expr1
= gfc_get_expr ();
9590 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9591 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9592 new_st
->expr1
->ts
.kind
= 4;
9593 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9594 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9595 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9596 /* Set up arguments. */
9597 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9598 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9599 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9600 new_st
->expr1
->where
= code
->loc
;
9601 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9602 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9603 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9604 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9605 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9606 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9607 new_st
->next
= body
->next
;
9609 if (default_case
->next
)
9611 new_st
->block
= gfc_get_code (EXEC_IF
);
9612 new_st
= new_st
->block
;
9613 new_st
->next
= default_case
->next
;
9616 /* Replace CLASS DEFAULT code by the IF chain. */
9617 default_case
->next
= if_st
;
9620 /* Resolve the internal code. This cannot be done earlier because
9621 it requires that the sym->assoc of selectors is set already. */
9622 gfc_current_ns
= ns
;
9623 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9624 gfc_current_ns
= old_ns
;
9631 /* Resolve a SELECT RANK statement. */
9634 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9637 gfc_code
*body
, *new_st
, *tail
;
9639 char tname
[GFC_MAX_SYMBOL_LEN
];
9640 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9642 gfc_expr
*selector_expr
= NULL
;
9644 HOST_WIDE_INT charlen
= 0;
9646 ns
= code
->ext
.block
.ns
;
9649 code
->op
= EXEC_BLOCK
;
9652 gfc_association_list
* assoc
;
9654 assoc
= gfc_get_association_list ();
9655 assoc
->st
= code
->expr1
->symtree
;
9656 assoc
->target
= gfc_copy_expr (code
->expr2
);
9657 assoc
->target
->where
= code
->expr2
->where
;
9658 /* assoc->variable will be set by resolve_assoc_var. */
9660 code
->ext
.block
.assoc
= assoc
;
9661 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9663 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9666 code
->ext
.block
.assoc
= NULL
;
9668 /* Loop over RANK cases. Note that returning on the errors causes a
9669 cascade of further errors because the case blocks do not compile
9671 for (body
= code
->block
; body
; body
= body
->block
)
9673 c
= body
->ext
.block
.case_list
;
9675 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9679 /* Check for repeated cases. */
9680 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9682 gfc_case
*d
= tail
->ext
.block
.case_list
;
9688 /* Check F2018: C1153. */
9689 if (!c
->low
&& !d
->low
)
9690 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9691 &c
->where
, &d
->where
);
9693 if (!c
->low
|| !d
->low
)
9696 /* Check F2018: C1153. */
9697 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9698 if ((case_value
== case_value2
) && case_value
== -1)
9699 gfc_error ("RANK (*) at %L is repeated at %L",
9700 &c
->where
, &d
->where
);
9701 else if (case_value
== case_value2
)
9702 gfc_error ("RANK (%i) at %L is repeated at %L",
9703 case_value
, &c
->where
, &d
->where
);
9709 /* Check F2018: C1155. */
9710 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9711 || gfc_expr_attr (code
->expr1
).pointer
))
9712 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9713 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9715 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9716 || gfc_expr_attr (code
->expr1
).pointer
))
9717 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9718 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9721 /* Add EXEC_SELECT to switch on rank. */
9722 new_st
= gfc_get_code (code
->op
);
9723 new_st
->expr1
= code
->expr1
;
9724 new_st
->expr2
= code
->expr2
;
9725 new_st
->block
= code
->block
;
9726 code
->expr1
= code
->expr2
= NULL
;
9731 ns
->code
->next
= new_st
;
9733 code
->op
= EXEC_SELECT_RANK
;
9735 selector_expr
= code
->expr1
;
9737 /* Loop over SELECT RANK cases. */
9738 for (body
= code
->block
; body
; body
= body
->block
)
9740 c
= body
->ext
.block
.case_list
;
9743 /* Pass on the default case. */
9747 /* Associate temporary to selector. This should only be done
9748 when this case is actually true, so build a new ASSOCIATE
9749 that does precisely this here (instead of using the
9751 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9752 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9753 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9755 if (c
->ts
.type
== BT_CLASS
)
9756 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9757 else if (c
->ts
.type
== BT_DERIVED
)
9758 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9759 else if (c
->ts
.type
!= BT_CHARACTER
)
9760 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9762 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9763 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9765 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9766 if (case_value
>= 0)
9767 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9769 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9771 st
= gfc_find_symtree (ns
->sym_root
, name
);
9772 gcc_assert (st
->n
.sym
->assoc
);
9774 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9775 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9777 new_st
= gfc_get_code (EXEC_BLOCK
);
9778 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9779 new_st
->ext
.block
.ns
->code
= body
->next
;
9780 body
->next
= new_st
;
9782 /* Chain in the new list only if it is marked as dangling. Otherwise
9783 there is a CASE label overlap and this is already used. Just ignore,
9784 the error is diagnosed elsewhere. */
9785 if (st
->n
.sym
->assoc
->dangling
)
9787 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9788 st
->n
.sym
->assoc
->dangling
= 0;
9791 resolve_assoc_var (st
->n
.sym
, false);
9794 gfc_current_ns
= ns
;
9795 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9796 gfc_current_ns
= old_ns
;
9800 /* Resolve a transfer statement. This is making sure that:
9801 -- a derived type being transferred has only non-pointer components
9802 -- a derived type being transferred doesn't have private components, unless
9803 it's being transferred from the module where the type was defined
9804 -- we're not trying to transfer a whole assumed size array. */
9807 resolve_transfer (gfc_code
*code
)
9809 gfc_symbol
*sym
, *derived
;
9813 bool formatted
= false;
9814 gfc_dt
*dt
= code
->ext
.dt
;
9815 gfc_symbol
*dtio_sub
= NULL
;
9819 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9820 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9821 exp
= exp
->value
.op
.op1
;
9823 if (exp
&& exp
->expr_type
== EXPR_NULL
9826 gfc_error ("Invalid context for NULL () intrinsic at %L",
9831 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9832 && exp
->expr_type
!= EXPR_FUNCTION
9833 && exp
->expr_type
!= EXPR_STRUCTURE
))
9836 /* If we are reading, the variable will be changed. Note that
9837 code->ext.dt may be NULL if the TRANSFER is related to
9838 an INQUIRE statement -- but in this case, we are not reading, either. */
9839 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9840 && !gfc_check_vardef_context (exp
, false, false, false,
9844 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9845 || exp
->expr_type
== EXPR_FUNCTION
9846 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9848 /* Go to actual component transferred. */
9849 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9850 if (ref
->type
== REF_COMPONENT
)
9851 ts
= &ref
->u
.c
.component
->ts
;
9853 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9854 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9856 derived
= ts
->u
.derived
;
9858 /* Determine when to use the formatted DTIO procedure. */
9859 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9862 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9863 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9864 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9866 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9869 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9870 /* Check to see if this is a nested DTIO call, with the
9871 dummy as the io-list object. */
9872 if (sym
&& sym
== dtio_sub
&& sym
->formal
9873 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9874 && exp
->ref
== NULL
)
9876 if (!sym
->attr
.recursive
)
9878 gfc_error ("DTIO %s procedure at %L must be recursive",
9879 sym
->name
, &sym
->declared_at
);
9886 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9888 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9889 "it is processed by a defined input/output procedure",
9894 if (ts
->type
== BT_DERIVED
)
9896 /* Check that transferred derived type doesn't contain POINTER
9897 components unless it is processed by a defined input/output
9899 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9901 gfc_error ("Data transfer element at %L cannot have POINTER "
9902 "components unless it is processed by a defined "
9903 "input/output procedure", &code
->loc
);
9908 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9910 gfc_error ("Data transfer element at %L cannot have "
9911 "procedure pointer components", &code
->loc
);
9915 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9917 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9918 "components unless it is processed by a defined "
9919 "input/output procedure", &code
->loc
);
9923 /* C_PTR and C_FUNPTR have private components which means they cannot
9924 be printed. However, if -std=gnu and not -pedantic, allow
9925 the component to be printed to help debugging. */
9926 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9928 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9929 "cannot have PRIVATE components", &code
->loc
))
9932 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9934 gfc_error ("Data transfer element at %L cannot have "
9935 "PRIVATE components unless it is processed by "
9936 "a defined input/output procedure", &code
->loc
);
9941 if (exp
->expr_type
== EXPR_STRUCTURE
)
9944 sym
= exp
->symtree
->n
.sym
;
9946 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9947 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9949 gfc_error ("Data transfer element at %L cannot be a full reference to "
9950 "an assumed-size array", &code
->loc
);
9956 /*********** Toplevel code resolution subroutines ***********/
9958 /* Find the set of labels that are reachable from this block. We also
9959 record the last statement in each block. */
9962 find_reachable_labels (gfc_code
*block
)
9969 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9971 /* Collect labels in this block. We don't keep those corresponding
9972 to END {IF|SELECT}, these are checked in resolve_branch by going
9973 up through the code_stack. */
9974 for (c
= block
; c
; c
= c
->next
)
9976 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9977 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9980 /* Merge with labels from parent block. */
9983 gcc_assert (cs_base
->prev
->reachable_labels
);
9984 bitmap_ior_into (cs_base
->reachable_labels
,
9985 cs_base
->prev
->reachable_labels
);
9991 resolve_lock_unlock_event (gfc_code
*code
)
9993 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9994 && code
->expr1
->value
.function
.isym
9995 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9996 remove_caf_get_intrinsic (code
->expr1
);
9998 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9999 && (code
->expr1
->ts
.type
!= BT_DERIVED
10000 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10001 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
10002 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
10003 || code
->expr1
->rank
!= 0
10004 || (!gfc_is_coarray (code
->expr1
) &&
10005 !gfc_is_coindexed (code
->expr1
))))
10006 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
10007 &code
->expr1
->where
);
10008 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
10009 && (code
->expr1
->ts
.type
!= BT_DERIVED
10010 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10011 || code
->expr1
->ts
.u
.derived
->from_intmod
10012 != INTMOD_ISO_FORTRAN_ENV
10013 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
10014 != ISOFORTRAN_EVENT_TYPE
10015 || code
->expr1
->rank
!= 0))
10016 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
10017 &code
->expr1
->where
);
10018 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
10019 && !gfc_is_coindexed (code
->expr1
))
10020 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
10021 &code
->expr1
->where
);
10022 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
10023 gfc_error ("Event variable argument at %L must be a coarray but not "
10024 "coindexed", &code
->expr1
->where
);
10028 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10029 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10030 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10031 &code
->expr2
->where
);
10034 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
10035 _("STAT variable")))
10038 /* Check ERRMSG. */
10040 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10041 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10042 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10043 &code
->expr3
->where
);
10046 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
10047 _("ERRMSG variable")))
10050 /* Check for LOCK the ACQUIRED_LOCK. */
10051 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10052 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
10053 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
10054 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
10055 "variable", &code
->expr4
->where
);
10057 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10058 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
10059 _("ACQUIRED_LOCK variable")))
10062 /* Check for EVENT WAIT the UNTIL_COUNT. */
10063 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
10065 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
10066 || code
->expr4
->rank
!= 0)
10067 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
10068 "expression", &code
->expr4
->where
);
10074 resolve_critical (gfc_code
*code
)
10076 gfc_symtree
*symtree
;
10077 gfc_symbol
*lock_type
;
10078 char name
[GFC_MAX_SYMBOL_LEN
];
10079 static int serial
= 0;
10081 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10084 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10085 GFC_PREFIX ("lock_type"));
10087 lock_type
= symtree
->n
.sym
;
10090 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10092 gcc_unreachable ();
10093 lock_type
= symtree
->n
.sym
;
10094 lock_type
->attr
.flavor
= FL_DERIVED
;
10095 lock_type
->attr
.zero_comp
= 1;
10096 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10097 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10100 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10101 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10102 gcc_unreachable ();
10104 code
->resolved_sym
= symtree
->n
.sym
;
10105 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10106 symtree
->n
.sym
->attr
.referenced
= 1;
10107 symtree
->n
.sym
->attr
.artificial
= 1;
10108 symtree
->n
.sym
->attr
.codimension
= 1;
10109 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10110 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10111 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10112 symtree
->n
.sym
->as
->corank
= 1;
10113 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10114 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10115 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10117 gfc_commit_symbols();
10122 resolve_sync (gfc_code
*code
)
10124 /* Check imageset. The * case matches expr1 == NULL. */
10127 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10128 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10129 "INTEGER expression", &code
->expr1
->where
);
10130 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10131 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10132 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10133 &code
->expr1
->where
);
10134 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10135 && gfc_simplify_expr (code
->expr1
, 0))
10137 gfc_constructor
*cons
;
10138 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10139 for (; cons
; cons
= gfc_constructor_next (cons
))
10140 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10141 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10142 gfc_error ("Imageset argument at %L must between 1 and "
10143 "num_images()", &cons
->expr
->where
);
10148 gfc_resolve_expr (code
->expr2
);
10150 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10151 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10152 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10153 &code
->expr2
->where
);
10155 /* Check ERRMSG. */
10156 gfc_resolve_expr (code
->expr3
);
10158 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10159 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10160 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10161 &code
->expr3
->where
);
10165 /* Given a branch to a label, see if the branch is conforming.
10166 The code node describes where the branch is located. */
10169 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10176 /* Step one: is this a valid branching target? */
10178 if (label
->defined
== ST_LABEL_UNKNOWN
)
10180 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10185 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10187 gfc_error ("Statement at %L is not a valid branch target statement "
10188 "for the branch statement at %L", &label
->where
, &code
->loc
);
10192 /* Step two: make sure this branch is not a branch to itself ;-) */
10194 if (code
->here
== label
)
10197 "Branch at %L may result in an infinite loop", &code
->loc
);
10201 /* Step three: See if the label is in the same block as the
10202 branching statement. The hard work has been done by setting up
10203 the bitmap reachable_labels. */
10205 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10207 /* Check now whether there is a CRITICAL construct; if so, check
10208 whether the label is still visible outside of the CRITICAL block,
10209 which is invalid. */
10210 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10212 if (stack
->current
->op
== EXEC_CRITICAL
10213 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10214 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10215 "label at %L", &code
->loc
, &label
->where
);
10216 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10217 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10218 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10219 "for label at %L", &code
->loc
, &label
->where
);
10225 /* Step four: If we haven't found the label in the bitmap, it may
10226 still be the label of the END of the enclosing block, in which
10227 case we find it by going up the code_stack. */
10229 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10231 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10233 if (stack
->current
->op
== EXEC_CRITICAL
)
10235 /* Note: A label at END CRITICAL does not leave the CRITICAL
10236 construct as END CRITICAL is still part of it. */
10237 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10238 " at %L", &code
->loc
, &label
->where
);
10241 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10243 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10244 "label at %L", &code
->loc
, &label
->where
);
10251 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10255 /* The label is not in an enclosing block, so illegal. This was
10256 allowed in Fortran 66, so we allow it as extension. No
10257 further checks are necessary in this case. */
10258 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10259 "as the GOTO statement at %L", &label
->where
,
10265 /* Check whether EXPR1 has the same shape as EXPR2. */
10268 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10270 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10271 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10272 bool result
= false;
10275 /* Compare the rank. */
10276 if (expr1
->rank
!= expr2
->rank
)
10279 /* Compare the size of each dimension. */
10280 for (i
=0; i
<expr1
->rank
; i
++)
10282 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10285 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10288 if (mpz_cmp (shape
[i
], shape2
[i
]))
10292 /* When either of the two expression is an assumed size array, we
10293 ignore the comparison of dimension sizes. */
10298 gfc_clear_shape (shape
, i
);
10299 gfc_clear_shape (shape2
, i
);
10304 /* Check whether a WHERE assignment target or a WHERE mask expression
10305 has the same shape as the outmost WHERE mask expression. */
10308 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10312 gfc_expr
*e
= NULL
;
10314 cblock
= code
->block
;
10316 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10317 In case of nested WHERE, only the outmost one is stored. */
10318 if (mask
== NULL
) /* outmost WHERE */
10320 else /* inner WHERE */
10327 /* Check if the mask-expr has a consistent shape with the
10328 outmost WHERE mask-expr. */
10329 if (!resolve_where_shape (cblock
->expr1
, e
))
10330 gfc_error ("WHERE mask at %L has inconsistent shape",
10331 &cblock
->expr1
->where
);
10334 /* the assignment statement of a WHERE statement, or the first
10335 statement in where-body-construct of a WHERE construct */
10336 cnext
= cblock
->next
;
10341 /* WHERE assignment statement */
10344 /* Check shape consistent for WHERE assignment target. */
10345 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10346 gfc_error ("WHERE assignment target at %L has "
10347 "inconsistent shape", &cnext
->expr1
->where
);
10351 case EXEC_ASSIGN_CALL
:
10352 resolve_call (cnext
);
10353 if (!cnext
->resolved_sym
->attr
.elemental
)
10354 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10355 &cnext
->ext
.actual
->expr
->where
);
10358 /* WHERE or WHERE construct is part of a where-body-construct */
10360 resolve_where (cnext
, e
);
10364 gfc_error ("Unsupported statement inside WHERE at %L",
10367 /* the next statement within the same where-body-construct */
10368 cnext
= cnext
->next
;
10370 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10371 cblock
= cblock
->block
;
10376 /* Resolve assignment in FORALL construct.
10377 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10378 FORALL index variables. */
10381 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10385 for (n
= 0; n
< nvar
; n
++)
10387 gfc_symbol
*forall_index
;
10389 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10391 /* Check whether the assignment target is one of the FORALL index
10393 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10394 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10395 gfc_error ("Assignment to a FORALL index variable at %L",
10396 &code
->expr1
->where
);
10399 /* If one of the FORALL index variables doesn't appear in the
10400 assignment variable, then there could be a many-to-one
10401 assignment. Emit a warning rather than an error because the
10402 mask could be resolving this problem. */
10403 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10404 gfc_warning (0, "The FORALL with index %qs is not used on the "
10405 "left side of the assignment at %L and so might "
10406 "cause multiple assignment to this object",
10407 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10413 /* Resolve WHERE statement in FORALL construct. */
10416 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10417 gfc_expr
**var_expr
)
10422 cblock
= code
->block
;
10425 /* the assignment statement of a WHERE statement, or the first
10426 statement in where-body-construct of a WHERE construct */
10427 cnext
= cblock
->next
;
10432 /* WHERE assignment statement */
10434 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10437 /* WHERE operator assignment statement */
10438 case EXEC_ASSIGN_CALL
:
10439 resolve_call (cnext
);
10440 if (!cnext
->resolved_sym
->attr
.elemental
)
10441 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10442 &cnext
->ext
.actual
->expr
->where
);
10445 /* WHERE or WHERE construct is part of a where-body-construct */
10447 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10451 gfc_error ("Unsupported statement inside WHERE at %L",
10454 /* the next statement within the same where-body-construct */
10455 cnext
= cnext
->next
;
10457 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10458 cblock
= cblock
->block
;
10463 /* Traverse the FORALL body to check whether the following errors exist:
10464 1. For assignment, check if a many-to-one assignment happens.
10465 2. For WHERE statement, check the WHERE body to see if there is any
10466 many-to-one assignment. */
10469 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10473 c
= code
->block
->next
;
10479 case EXEC_POINTER_ASSIGN
:
10480 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10483 case EXEC_ASSIGN_CALL
:
10487 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10488 there is no need to handle it here. */
10492 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10497 /* The next statement in the FORALL body. */
10503 /* Counts the number of iterators needed inside a forall construct, including
10504 nested forall constructs. This is used to allocate the needed memory
10505 in gfc_resolve_forall. */
10508 gfc_count_forall_iterators (gfc_code
*code
)
10510 int max_iters
, sub_iters
, current_iters
;
10511 gfc_forall_iterator
*fa
;
10513 gcc_assert(code
->op
== EXEC_FORALL
);
10517 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10520 code
= code
->block
->next
;
10524 if (code
->op
== EXEC_FORALL
)
10526 sub_iters
= gfc_count_forall_iterators (code
);
10527 if (sub_iters
> max_iters
)
10528 max_iters
= sub_iters
;
10533 return current_iters
+ max_iters
;
10537 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10538 gfc_resolve_forall_body to resolve the FORALL body. */
10541 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10543 static gfc_expr
**var_expr
;
10544 static int total_var
= 0;
10545 static int nvar
= 0;
10546 int i
, old_nvar
, tmp
;
10547 gfc_forall_iterator
*fa
;
10551 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10554 /* Start to resolve a FORALL construct */
10555 if (forall_save
== 0)
10557 /* Count the total number of FORALL indices in the nested FORALL
10558 construct in order to allocate the VAR_EXPR with proper size. */
10559 total_var
= gfc_count_forall_iterators (code
);
10561 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10562 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10565 /* The information about FORALL iterator, including FORALL indices start, end
10566 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10567 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10569 /* Fortran 20008: C738 (R753). */
10570 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10572 gfc_error ("FORALL index-name at %L must be a scalar variable "
10573 "of type integer", &fa
->var
->where
);
10577 /* Check if any outer FORALL index name is the same as the current
10579 for (i
= 0; i
< nvar
; i
++)
10581 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10582 gfc_error ("An outer FORALL construct already has an index "
10583 "with this name %L", &fa
->var
->where
);
10586 /* Record the current FORALL index. */
10587 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10591 /* No memory leak. */
10592 gcc_assert (nvar
<= total_var
);
10595 /* Resolve the FORALL body. */
10596 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10598 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10599 gfc_resolve_blocks (code
->block
, ns
);
10603 /* Free only the VAR_EXPRs allocated in this frame. */
10604 for (i
= nvar
; i
< tmp
; i
++)
10605 gfc_free_expr (var_expr
[i
]);
10609 /* We are in the outermost FORALL construct. */
10610 gcc_assert (forall_save
== 0);
10612 /* VAR_EXPR is not needed any more. */
10619 /* Resolve a BLOCK construct statement. */
10622 resolve_block_construct (gfc_code
* code
)
10624 /* Resolve the BLOCK's namespace. */
10625 gfc_resolve (code
->ext
.block
.ns
);
10627 /* For an ASSOCIATE block, the associations (and their targets) are already
10628 resolved during resolve_symbol. */
10632 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10636 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10640 for (; b
; b
= b
->block
)
10642 t
= gfc_resolve_expr (b
->expr1
);
10643 if (!gfc_resolve_expr (b
->expr2
))
10649 if (t
&& b
->expr1
!= NULL
10650 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10651 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10657 && b
->expr1
!= NULL
10658 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10659 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10664 resolve_branch (b
->label1
, b
);
10668 resolve_block_construct (b
);
10672 case EXEC_SELECT_TYPE
:
10673 case EXEC_SELECT_RANK
:
10676 case EXEC_DO_WHILE
:
10677 case EXEC_DO_CONCURRENT
:
10678 case EXEC_CRITICAL
:
10681 case EXEC_IOLENGTH
:
10685 case EXEC_OMP_ATOMIC
:
10686 case EXEC_OACC_ATOMIC
:
10688 gfc_omp_atomic_op aop
10689 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10691 /* Verify this before calling gfc_resolve_code, which might
10693 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10694 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10695 && b
->next
->next
== NULL
)
10696 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10697 && b
->next
->next
!= NULL
10698 && b
->next
->next
->op
== EXEC_ASSIGN
10699 && b
->next
->next
->next
== NULL
));
10703 case EXEC_OACC_PARALLEL_LOOP
:
10704 case EXEC_OACC_PARALLEL
:
10705 case EXEC_OACC_KERNELS_LOOP
:
10706 case EXEC_OACC_KERNELS
:
10707 case EXEC_OACC_SERIAL_LOOP
:
10708 case EXEC_OACC_SERIAL
:
10709 case EXEC_OACC_DATA
:
10710 case EXEC_OACC_HOST_DATA
:
10711 case EXEC_OACC_LOOP
:
10712 case EXEC_OACC_UPDATE
:
10713 case EXEC_OACC_WAIT
:
10714 case EXEC_OACC_CACHE
:
10715 case EXEC_OACC_ENTER_DATA
:
10716 case EXEC_OACC_EXIT_DATA
:
10717 case EXEC_OACC_ROUTINE
:
10718 case EXEC_OMP_CRITICAL
:
10719 case EXEC_OMP_DISTRIBUTE
:
10720 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10721 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10722 case EXEC_OMP_DISTRIBUTE_SIMD
:
10724 case EXEC_OMP_DO_SIMD
:
10725 case EXEC_OMP_MASTER
:
10726 case EXEC_OMP_ORDERED
:
10727 case EXEC_OMP_PARALLEL
:
10728 case EXEC_OMP_PARALLEL_DO
:
10729 case EXEC_OMP_PARALLEL_DO_SIMD
:
10730 case EXEC_OMP_PARALLEL_SECTIONS
:
10731 case EXEC_OMP_PARALLEL_WORKSHARE
:
10732 case EXEC_OMP_SECTIONS
:
10733 case EXEC_OMP_SIMD
:
10734 case EXEC_OMP_SINGLE
:
10735 case EXEC_OMP_TARGET
:
10736 case EXEC_OMP_TARGET_DATA
:
10737 case EXEC_OMP_TARGET_ENTER_DATA
:
10738 case EXEC_OMP_TARGET_EXIT_DATA
:
10739 case EXEC_OMP_TARGET_PARALLEL
:
10740 case EXEC_OMP_TARGET_PARALLEL_DO
:
10741 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10742 case EXEC_OMP_TARGET_SIMD
:
10743 case EXEC_OMP_TARGET_TEAMS
:
10744 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10745 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10746 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10747 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10748 case EXEC_OMP_TARGET_UPDATE
:
10749 case EXEC_OMP_TASK
:
10750 case EXEC_OMP_TASKGROUP
:
10751 case EXEC_OMP_TASKLOOP
:
10752 case EXEC_OMP_TASKLOOP_SIMD
:
10753 case EXEC_OMP_TASKWAIT
:
10754 case EXEC_OMP_TASKYIELD
:
10755 case EXEC_OMP_TEAMS
:
10756 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10757 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10758 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10759 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10760 case EXEC_OMP_WORKSHARE
:
10764 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10767 gfc_resolve_code (b
->next
, ns
);
10772 /* Does everything to resolve an ordinary assignment. Returns true
10773 if this is an interface assignment. */
10775 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10782 symbol_attribute attr
;
10784 if (gfc_extend_assign (code
, ns
))
10788 if (code
->op
== EXEC_ASSIGN_CALL
)
10790 lhs
= code
->ext
.actual
->expr
;
10791 rhsptr
= &code
->ext
.actual
->next
->expr
;
10795 gfc_actual_arglist
* args
;
10796 gfc_typebound_proc
* tbp
;
10798 gcc_assert (code
->op
== EXEC_COMPCALL
);
10800 args
= code
->expr1
->value
.compcall
.actual
;
10802 rhsptr
= &args
->next
->expr
;
10804 tbp
= code
->expr1
->value
.compcall
.tbp
;
10805 gcc_assert (!tbp
->is_generic
);
10808 /* Make a temporary rhs when there is a default initializer
10809 and rhs is the same symbol as the lhs. */
10810 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10811 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10812 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10813 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10814 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10822 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10823 && rhs
->ts
.type
== BT_CHARACTER
10824 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10826 /* Use of -fdec-char-conversions allows assignment of character data
10827 to non-character variables. This not permited for nonconstant
10829 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10830 gfc_typename (lhs
), &rhs
->where
);
10834 /* Handle the case of a BOZ literal on the RHS. */
10835 if (rhs
->ts
.type
== BT_BOZ
)
10837 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10838 "statement value nor an actual argument of "
10839 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10843 switch (lhs
->ts
.type
)
10846 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10850 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10854 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10859 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10861 HOST_WIDE_INT llen
= 0, rlen
= 0;
10862 if (lhs
->ts
.u
.cl
!= NULL
10863 && lhs
->ts
.u
.cl
->length
!= NULL
10864 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10865 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10867 if (rhs
->expr_type
== EXPR_CONSTANT
)
10868 rlen
= rhs
->value
.character
.length
;
10870 else if (rhs
->ts
.u
.cl
!= NULL
10871 && rhs
->ts
.u
.cl
->length
!= NULL
10872 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10873 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10875 if (rlen
&& llen
&& rlen
> llen
)
10876 gfc_warning_now (OPT_Wcharacter_truncation
,
10877 "CHARACTER expression will be truncated "
10878 "in assignment (%ld/%ld) at %L",
10879 (long) llen
, (long) rlen
, &code
->loc
);
10882 /* Ensure that a vector index expression for the lvalue is evaluated
10883 to a temporary if the lvalue symbol is referenced in it. */
10886 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10887 if (ref
->type
== REF_ARRAY
)
10889 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10890 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10891 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10892 ref
->u
.ar
.start
[n
]))
10894 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10898 if (gfc_pure (NULL
))
10900 if (lhs
->ts
.type
== BT_DERIVED
10901 && lhs
->expr_type
== EXPR_VARIABLE
10902 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10903 && rhs
->expr_type
== EXPR_VARIABLE
10904 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10905 || gfc_is_coindexed (rhs
)))
10907 /* F2008, C1283. */
10908 if (gfc_is_coindexed (rhs
))
10909 gfc_error ("Coindexed expression at %L is assigned to "
10910 "a derived type variable with a POINTER "
10911 "component in a PURE procedure",
10914 /* F2008, C1283 (4). */
10915 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10916 "shall not be used as the expr at %L of an intrinsic "
10917 "assignment statement in which the variable is of a "
10918 "derived type if the derived type has a pointer "
10919 "component at any level of component selection.",
10924 /* Fortran 2008, C1283. */
10925 if (gfc_is_coindexed (lhs
))
10927 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10928 "procedure", &rhs
->where
);
10933 if (gfc_implicit_pure (NULL
))
10935 if (lhs
->expr_type
== EXPR_VARIABLE
10936 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10937 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10938 gfc_unset_implicit_pure (NULL
);
10940 if (lhs
->ts
.type
== BT_DERIVED
10941 && lhs
->expr_type
== EXPR_VARIABLE
10942 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10943 && rhs
->expr_type
== EXPR_VARIABLE
10944 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10945 || gfc_is_coindexed (rhs
)))
10946 gfc_unset_implicit_pure (NULL
);
10948 /* Fortran 2008, C1283. */
10949 if (gfc_is_coindexed (lhs
))
10950 gfc_unset_implicit_pure (NULL
);
10953 /* F2008, 7.2.1.2. */
10954 attr
= gfc_expr_attr (lhs
);
10955 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10957 if (attr
.codimension
)
10959 gfc_error ("Assignment to polymorphic coarray at %L is not "
10960 "permitted", &lhs
->where
);
10963 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10964 "polymorphic variable at %L", &lhs
->where
))
10966 if (!flag_realloc_lhs
)
10968 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10969 "requires %<-frealloc-lhs%>", &lhs
->where
);
10973 else if (lhs
->ts
.type
== BT_CLASS
)
10975 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10976 "assignment at %L - check that there is a matching specific "
10977 "subroutine for '=' operator", &lhs
->where
);
10981 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10983 /* F2008, Section 7.2.1.2. */
10984 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10986 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10987 "component in assignment at %L", &lhs
->where
);
10991 /* Assign the 'data' of a class object to a derived type. */
10992 if (lhs
->ts
.type
== BT_DERIVED
10993 && rhs
->ts
.type
== BT_CLASS
10994 && rhs
->expr_type
!= EXPR_ARRAY
)
10995 gfc_add_data_component (rhs
);
10997 /* Make sure there is a vtable and, in particular, a _copy for the
10999 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
11000 gfc_find_vtab (&rhs
->ts
);
11002 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
11004 || (code
->expr2
->expr_type
== EXPR_FUNCTION
11005 && code
->expr2
->value
.function
.isym
11006 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
11007 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
11008 && !gfc_expr_attr (rhs
).allocatable
11009 && !gfc_has_vector_subscript (rhs
)));
11011 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
11013 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
11014 Additionally, insert this code when the RHS is a CAF as we then use the
11015 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
11016 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
11017 noncoindexed array and the RHS is a coindexed scalar, use the normal code
11019 if (caf_convert_to_send
)
11021 if (code
->expr2
->expr_type
== EXPR_FUNCTION
11022 && code
->expr2
->value
.function
.isym
11023 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11024 remove_caf_get_intrinsic (code
->expr2
);
11025 code
->op
= EXEC_CALL
;
11026 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
11027 code
->resolved_sym
= code
->symtree
->n
.sym
;
11028 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
11029 code
->resolved_sym
->attr
.intrinsic
= 1;
11030 code
->resolved_sym
->attr
.subroutine
= 1;
11031 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
11032 gfc_commit_symbol (code
->resolved_sym
);
11033 code
->ext
.actual
= gfc_get_actual_arglist ();
11034 code
->ext
.actual
->expr
= lhs
;
11035 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
11036 code
->ext
.actual
->next
->expr
= rhs
;
11037 code
->expr1
= NULL
;
11038 code
->expr2
= NULL
;
11045 /* Add a component reference onto an expression. */
11048 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
11053 ref
= &((*ref
)->next
);
11054 *ref
= gfc_get_ref ();
11055 (*ref
)->type
= REF_COMPONENT
;
11056 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
11057 (*ref
)->u
.c
.component
= c
;
11060 /* Add a full array ref, as necessary. */
11063 gfc_add_full_array_ref (e
, c
->as
);
11064 e
->rank
= c
->as
->rank
;
11069 /* Build an assignment. Keep the argument 'op' for future use, so that
11070 pointer assignments can be made. */
11073 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
11074 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11076 gfc_code
*this_code
;
11078 this_code
= gfc_get_code (op
);
11079 this_code
->next
= NULL
;
11080 this_code
->expr1
= gfc_copy_expr (expr1
);
11081 this_code
->expr2
= gfc_copy_expr (expr2
);
11082 this_code
->loc
= loc
;
11083 if (comp1
&& comp2
)
11085 add_comp_ref (this_code
->expr1
, comp1
);
11086 add_comp_ref (this_code
->expr2
, comp2
);
11093 /* Makes a temporary variable expression based on the characteristics of
11094 a given variable expression. */
11097 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11099 static int serial
= 0;
11100 char name
[GFC_MAX_SYMBOL_LEN
];
11102 gfc_array_spec
*as
;
11103 gfc_array_ref
*aref
;
11106 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11107 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11108 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11110 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11111 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11113 e
->value
.character
.length
);
11119 /* Obtain the arrayspec for the temporary. */
11120 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11121 && e
->expr_type
!= EXPR_FUNCTION
11122 && e
->expr_type
!= EXPR_OP
)
11124 aref
= gfc_find_array_ref (e
);
11125 if (e
->expr_type
== EXPR_VARIABLE
11126 && e
->symtree
->n
.sym
->as
== aref
->as
)
11130 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11131 if (ref
->type
== REF_COMPONENT
11132 && ref
->u
.c
.component
->as
== aref
->as
)
11140 /* Add the attributes and the arrayspec to the temporary. */
11141 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11142 tmp
->n
.sym
->attr
.function
= 0;
11143 tmp
->n
.sym
->attr
.result
= 0;
11144 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11145 tmp
->n
.sym
->attr
.dummy
= 0;
11146 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11150 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11153 if (as
->type
== AS_DEFERRED
)
11154 tmp
->n
.sym
->attr
.allocatable
= 1;
11156 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11157 || e
->expr_type
== EXPR_FUNCTION
11158 || e
->expr_type
== EXPR_OP
))
11160 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11161 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11162 tmp
->n
.sym
->as
->rank
= e
->rank
;
11163 tmp
->n
.sym
->attr
.allocatable
= 1;
11164 tmp
->n
.sym
->attr
.dimension
= 1;
11167 tmp
->n
.sym
->attr
.dimension
= 0;
11169 gfc_set_sym_referenced (tmp
->n
.sym
);
11170 gfc_commit_symbol (tmp
->n
.sym
);
11171 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11173 /* Should the lhs be a section, use its array ref for the
11174 temporary expression. */
11175 if (aref
&& aref
->type
!= AR_FULL
)
11177 gfc_free_ref_list (e
->ref
);
11178 e
->ref
= gfc_copy_ref (ref
);
11184 /* Add one line of code to the code chain, making sure that 'head' and
11185 'tail' are appropriately updated. */
11188 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11190 gcc_assert (this_code
);
11192 *head
= *tail
= *this_code
;
11194 *tail
= gfc_append_code (*tail
, *this_code
);
11199 /* Counts the potential number of part array references that would
11200 result from resolution of typebound defined assignments. */
11203 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11206 int c_depth
= 0, t_depth
;
11208 for (c
= derived
->components
; c
; c
= c
->next
)
11210 if ((!gfc_bt_struct (c
->ts
.type
)
11212 || c
->attr
.allocatable
11213 || c
->attr
.proc_pointer_comp
11214 || c
->attr
.class_pointer
11215 || c
->attr
.proc_pointer
)
11216 && !c
->attr
.defined_assign_comp
)
11219 if (c
->as
&& c_depth
== 0)
11222 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11223 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11228 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11230 return depth
+ c_depth
;
11234 /* Implement 7.2.1.3 of the F08 standard:
11235 "An intrinsic assignment where the variable is of derived type is
11236 performed as if each component of the variable were assigned from the
11237 corresponding component of expr using pointer assignment (7.2.2) for
11238 each pointer component, defined assignment for each nonpointer
11239 nonallocatable component of a type that has a type-bound defined
11240 assignment consistent with the component, intrinsic assignment for
11241 each other nonpointer nonallocatable component, ..."
11243 The pointer assignments are taken care of by the intrinsic
11244 assignment of the structure itself. This function recursively adds
11245 defined assignments where required. The recursion is accomplished
11246 by calling gfc_resolve_code.
11248 When the lhs in a defined assignment has intent INOUT, we need a
11249 temporary for the lhs. In pseudo-code:
11251 ! Only call function lhs once.
11252 if (lhs is not a constant or an variable)
11255 ! Do the intrinsic assignment
11257 ! Now do the defined assignments
11258 do over components with typebound defined assignment [%cmp]
11259 #if one component's assignment procedure is INOUT
11261 #if expr2 non-variable
11267 t1%cmp {defined=} expr2%cmp
11273 expr1%cmp {defined=} expr2%cmp
11277 /* The temporary assignments have to be put on top of the additional
11278 code to avoid the result being changed by the intrinsic assignment.
11280 static int component_assignment_level
= 0;
11281 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11284 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11286 gfc_component
*comp1
, *comp2
;
11287 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11289 int error_count
, depth
;
11291 gfc_get_errors (NULL
, &error_count
);
11293 /* Filter out continuing processing after an error. */
11295 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11296 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11299 /* TODO: Handle more than one part array reference in assignments. */
11300 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11301 (*code
)->expr1
->rank
? 1 : 0);
11304 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11305 "done because multiple part array references would "
11306 "occur in intermediate expressions.", &(*code
)->loc
);
11310 component_assignment_level
++;
11312 /* Create a temporary so that functions get called only once. */
11313 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11314 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11316 gfc_expr
*tmp_expr
;
11318 /* Assign the rhs to the temporary. */
11319 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11320 this_code
= build_assignment (EXEC_ASSIGN
,
11321 tmp_expr
, (*code
)->expr2
,
11322 NULL
, NULL
, (*code
)->loc
);
11323 /* Add the code and substitute the rhs expression. */
11324 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11325 gfc_free_expr ((*code
)->expr2
);
11326 (*code
)->expr2
= tmp_expr
;
11329 /* Do the intrinsic assignment. This is not needed if the lhs is one
11330 of the temporaries generated here, since the intrinsic assignment
11331 to the final result already does this. */
11332 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11334 this_code
= build_assignment (EXEC_ASSIGN
,
11335 (*code
)->expr1
, (*code
)->expr2
,
11336 NULL
, NULL
, (*code
)->loc
);
11337 add_code_to_chain (&this_code
, &head
, &tail
);
11340 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11341 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11344 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11346 bool inout
= false;
11348 /* The intrinsic assignment does the right thing for pointers
11349 of all kinds and allocatable components. */
11350 if (!gfc_bt_struct (comp1
->ts
.type
)
11351 || comp1
->attr
.pointer
11352 || comp1
->attr
.allocatable
11353 || comp1
->attr
.proc_pointer_comp
11354 || comp1
->attr
.class_pointer
11355 || comp1
->attr
.proc_pointer
)
11358 /* Make an assigment for this component. */
11359 this_code
= build_assignment (EXEC_ASSIGN
,
11360 (*code
)->expr1
, (*code
)->expr2
,
11361 comp1
, comp2
, (*code
)->loc
);
11363 /* Convert the assignment if there is a defined assignment for
11364 this type. Otherwise, using the call from gfc_resolve_code,
11365 recurse into its components. */
11366 gfc_resolve_code (this_code
, ns
);
11368 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11370 gfc_formal_arglist
*dummy_args
;
11372 /* Check that there is a typebound defined assignment. If not,
11373 then this must be a module defined assignment. We cannot
11374 use the defined_assign_comp attribute here because it must
11375 be this derived type that has the defined assignment and not
11377 if (!(comp1
->ts
.u
.derived
->f2k_derived
11378 && comp1
->ts
.u
.derived
->f2k_derived
11379 ->tb_op
[INTRINSIC_ASSIGN
]))
11381 gfc_free_statements (this_code
);
11386 /* If the first argument of the subroutine has intent INOUT
11387 a temporary must be generated and used instead. */
11388 rsym
= this_code
->resolved_sym
;
11389 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11391 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11393 gfc_code
*temp_code
;
11396 /* Build the temporary required for the assignment and put
11397 it at the head of the generated code. */
11400 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11401 temp_code
= build_assignment (EXEC_ASSIGN
,
11402 t1
, (*code
)->expr1
,
11403 NULL
, NULL
, (*code
)->loc
);
11405 /* For allocatable LHS, check whether it is allocated. Note
11406 that allocatable components with defined assignment are
11407 not yet support. See PR 57696. */
11408 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11412 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11413 block
= gfc_get_code (EXEC_IF
);
11414 block
->block
= gfc_get_code (EXEC_IF
);
11415 block
->block
->expr1
11416 = gfc_build_intrinsic_call (ns
,
11417 GFC_ISYM_ALLOCATED
, "allocated",
11418 (*code
)->loc
, 1, e
);
11419 block
->block
->next
= temp_code
;
11422 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11425 /* Replace the first actual arg with the component of the
11427 gfc_free_expr (this_code
->ext
.actual
->expr
);
11428 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11429 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11431 /* If the LHS variable is allocatable and wasn't allocated and
11432 the temporary is allocatable, pointer assign the address of
11433 the freshly allocated LHS to the temporary. */
11434 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11435 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11440 cond
= gfc_get_expr ();
11441 cond
->ts
.type
= BT_LOGICAL
;
11442 cond
->ts
.kind
= gfc_default_logical_kind
;
11443 cond
->expr_type
= EXPR_OP
;
11444 cond
->where
= (*code
)->loc
;
11445 cond
->value
.op
.op
= INTRINSIC_NOT
;
11446 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11447 GFC_ISYM_ALLOCATED
, "allocated",
11448 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11449 block
= gfc_get_code (EXEC_IF
);
11450 block
->block
= gfc_get_code (EXEC_IF
);
11451 block
->block
->expr1
= cond
;
11452 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11453 t1
, (*code
)->expr1
,
11454 NULL
, NULL
, (*code
)->loc
);
11455 add_code_to_chain (&block
, &head
, &tail
);
11459 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11461 /* Don't add intrinsic assignments since they are already
11462 effected by the intrinsic assignment of the structure. */
11463 gfc_free_statements (this_code
);
11468 add_code_to_chain (&this_code
, &head
, &tail
);
11472 /* Transfer the value to the final result. */
11473 this_code
= build_assignment (EXEC_ASSIGN
,
11474 (*code
)->expr1
, t1
,
11475 comp1
, comp2
, (*code
)->loc
);
11476 add_code_to_chain (&this_code
, &head
, &tail
);
11480 /* Put the temporary assignments at the top of the generated code. */
11481 if (tmp_head
&& component_assignment_level
== 1)
11483 gfc_append_code (tmp_head
, head
);
11485 tmp_head
= tmp_tail
= NULL
;
11488 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11489 // not accidentally deallocated. Hence, nullify t1.
11490 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11491 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11497 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11498 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11499 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11500 block
= gfc_get_code (EXEC_IF
);
11501 block
->block
= gfc_get_code (EXEC_IF
);
11502 block
->block
->expr1
= cond
;
11503 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11504 t1
, gfc_get_null_expr (&(*code
)->loc
),
11505 NULL
, NULL
, (*code
)->loc
);
11506 gfc_append_code (tail
, block
);
11510 /* Now attach the remaining code chain to the input code. Step on
11511 to the end of the new code since resolution is complete. */
11512 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11513 tail
->next
= (*code
)->next
;
11514 /* Overwrite 'code' because this would place the intrinsic assignment
11515 before the temporary for the lhs is created. */
11516 gfc_free_expr ((*code
)->expr1
);
11517 gfc_free_expr ((*code
)->expr2
);
11523 component_assignment_level
--;
11527 /* F2008: Pointer function assignments are of the form:
11528 ptr_fcn (args) = expr
11529 This function breaks these assignments into two statements:
11530 temporary_pointer => ptr_fcn(args)
11531 temporary_pointer = expr */
11534 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11536 gfc_expr
*tmp_ptr_expr
;
11537 gfc_code
*this_code
;
11538 gfc_component
*comp
;
11541 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11544 /* Even if standard does not support this feature, continue to build
11545 the two statements to avoid upsetting frontend_passes.c. */
11546 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11547 "%L", &(*code
)->loc
);
11549 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11552 s
= comp
->ts
.interface
;
11554 s
= (*code
)->expr1
->symtree
->n
.sym
;
11556 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11558 gfc_error ("The function result on the lhs of the assignment at "
11559 "%L must have the pointer attribute.",
11560 &(*code
)->expr1
->where
);
11561 (*code
)->op
= EXEC_NOP
;
11565 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11567 /* get_temp_from_expression is set up for ordinary assignments. To that
11568 end, where array bounds are not known, arrays are made allocatable.
11569 Change the temporary to a pointer here. */
11570 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11571 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11572 tmp_ptr_expr
->where
= (*code
)->loc
;
11574 this_code
= build_assignment (EXEC_ASSIGN
,
11575 tmp_ptr_expr
, (*code
)->expr2
,
11576 NULL
, NULL
, (*code
)->loc
);
11577 this_code
->next
= (*code
)->next
;
11578 (*code
)->next
= this_code
;
11579 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11580 (*code
)->expr2
= (*code
)->expr1
;
11581 (*code
)->expr1
= tmp_ptr_expr
;
11587 /* Deferred character length assignments from an operator expression
11588 require a temporary because the character length of the lhs can
11589 change in the course of the assignment. */
11592 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11594 gfc_expr
*tmp_expr
;
11595 gfc_code
*this_code
;
11597 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11598 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11599 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11602 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11605 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11608 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11609 tmp_expr
->where
= (*code
)->loc
;
11611 /* A new charlen is required to ensure that the variable string
11612 length is different to that of the original lhs. */
11613 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11614 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11615 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11616 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11618 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11620 this_code
= build_assignment (EXEC_ASSIGN
,
11622 gfc_copy_expr (tmp_expr
),
11623 NULL
, NULL
, (*code
)->loc
);
11625 (*code
)->expr1
= tmp_expr
;
11627 this_code
->next
= (*code
)->next
;
11628 (*code
)->next
= this_code
;
11634 /* Given a block of code, recursively resolve everything pointed to by this
11638 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11640 int omp_workshare_save
;
11641 int forall_save
, do_concurrent_save
;
11645 frame
.prev
= cs_base
;
11649 find_reachable_labels (code
);
11651 for (; code
; code
= code
->next
)
11653 frame
.current
= code
;
11654 forall_save
= forall_flag
;
11655 do_concurrent_save
= gfc_do_concurrent_flag
;
11657 if (code
->op
== EXEC_FORALL
)
11660 gfc_resolve_forall (code
, ns
, forall_save
);
11663 else if (code
->block
)
11665 omp_workshare_save
= -1;
11668 case EXEC_OACC_PARALLEL_LOOP
:
11669 case EXEC_OACC_PARALLEL
:
11670 case EXEC_OACC_KERNELS_LOOP
:
11671 case EXEC_OACC_KERNELS
:
11672 case EXEC_OACC_SERIAL_LOOP
:
11673 case EXEC_OACC_SERIAL
:
11674 case EXEC_OACC_DATA
:
11675 case EXEC_OACC_HOST_DATA
:
11676 case EXEC_OACC_LOOP
:
11677 gfc_resolve_oacc_blocks (code
, ns
);
11679 case EXEC_OMP_PARALLEL_WORKSHARE
:
11680 omp_workshare_save
= omp_workshare_flag
;
11681 omp_workshare_flag
= 1;
11682 gfc_resolve_omp_parallel_blocks (code
, ns
);
11684 case EXEC_OMP_PARALLEL
:
11685 case EXEC_OMP_PARALLEL_DO
:
11686 case EXEC_OMP_PARALLEL_DO_SIMD
:
11687 case EXEC_OMP_PARALLEL_SECTIONS
:
11688 case EXEC_OMP_TARGET_PARALLEL
:
11689 case EXEC_OMP_TARGET_PARALLEL_DO
:
11690 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11691 case EXEC_OMP_TARGET_TEAMS
:
11692 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11693 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11694 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11695 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11696 case EXEC_OMP_TASK
:
11697 case EXEC_OMP_TASKLOOP
:
11698 case EXEC_OMP_TASKLOOP_SIMD
:
11699 case EXEC_OMP_TEAMS
:
11700 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11701 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11702 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11703 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11704 omp_workshare_save
= omp_workshare_flag
;
11705 omp_workshare_flag
= 0;
11706 gfc_resolve_omp_parallel_blocks (code
, ns
);
11708 case EXEC_OMP_DISTRIBUTE
:
11709 case EXEC_OMP_DISTRIBUTE_SIMD
:
11711 case EXEC_OMP_DO_SIMD
:
11712 case EXEC_OMP_SIMD
:
11713 case EXEC_OMP_TARGET_SIMD
:
11714 gfc_resolve_omp_do_blocks (code
, ns
);
11716 case EXEC_SELECT_TYPE
:
11717 /* Blocks are handled in resolve_select_type because we have
11718 to transform the SELECT TYPE into ASSOCIATE first. */
11720 case EXEC_DO_CONCURRENT
:
11721 gfc_do_concurrent_flag
= 1;
11722 gfc_resolve_blocks (code
->block
, ns
);
11723 gfc_do_concurrent_flag
= 2;
11725 case EXEC_OMP_WORKSHARE
:
11726 omp_workshare_save
= omp_workshare_flag
;
11727 omp_workshare_flag
= 1;
11730 gfc_resolve_blocks (code
->block
, ns
);
11734 if (omp_workshare_save
!= -1)
11735 omp_workshare_flag
= omp_workshare_save
;
11739 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11740 t
= gfc_resolve_expr (code
->expr1
);
11741 forall_flag
= forall_save
;
11742 gfc_do_concurrent_flag
= do_concurrent_save
;
11744 if (!gfc_resolve_expr (code
->expr2
))
11747 if (code
->op
== EXEC_ALLOCATE
11748 && !gfc_resolve_expr (code
->expr3
))
11754 case EXEC_END_BLOCK
:
11755 case EXEC_END_NESTED_BLOCK
:
11759 case EXEC_ERROR_STOP
:
11761 case EXEC_CONTINUE
:
11763 case EXEC_ASSIGN_CALL
:
11766 case EXEC_CRITICAL
:
11767 resolve_critical (code
);
11770 case EXEC_SYNC_ALL
:
11771 case EXEC_SYNC_IMAGES
:
11772 case EXEC_SYNC_MEMORY
:
11773 resolve_sync (code
);
11778 case EXEC_EVENT_POST
:
11779 case EXEC_EVENT_WAIT
:
11780 resolve_lock_unlock_event (code
);
11783 case EXEC_FAIL_IMAGE
:
11784 case EXEC_FORM_TEAM
:
11785 case EXEC_CHANGE_TEAM
:
11786 case EXEC_END_TEAM
:
11787 case EXEC_SYNC_TEAM
:
11791 /* Keep track of which entry we are up to. */
11792 current_entry_id
= code
->ext
.entry
->id
;
11796 resolve_where (code
, NULL
);
11800 if (code
->expr1
!= NULL
)
11802 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11803 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11804 "INTEGER variable", &code
->expr1
->where
);
11805 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11806 gfc_error ("Variable %qs has not been assigned a target "
11807 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11808 &code
->expr1
->where
);
11811 resolve_branch (code
->label1
, code
);
11815 if (code
->expr1
!= NULL
11816 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11817 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11818 "INTEGER return specifier", &code
->expr1
->where
);
11821 case EXEC_INIT_ASSIGN
:
11822 case EXEC_END_PROCEDURE
:
11829 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11831 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11832 && code
->expr1
->value
.function
.isym
11833 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11834 remove_caf_get_intrinsic (code
->expr1
);
11836 /* If this is a pointer function in an lvalue variable context,
11837 the new code will have to be resolved afresh. This is also the
11838 case with an error, where the code is transformed into NOP to
11839 prevent ICEs downstream. */
11840 if (resolve_ptr_fcn_assign (&code
, ns
)
11841 || code
->op
== EXEC_NOP
)
11844 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11848 if (resolve_ordinary_assign (code
, ns
))
11850 if (code
->op
== EXEC_COMPCALL
)
11856 /* Check for dependencies in deferred character length array
11857 assignments and generate a temporary, if necessary. */
11858 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11861 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11862 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11863 && code
->expr1
->ts
.u
.derived
11864 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11865 generate_component_assignments (&code
, ns
);
11869 case EXEC_LABEL_ASSIGN
:
11870 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11871 gfc_error ("Label %d referenced at %L is never defined",
11872 code
->label1
->value
, &code
->label1
->where
);
11874 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11875 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11876 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11877 != gfc_default_integer_kind
11878 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11879 gfc_error ("ASSIGN statement at %L requires a scalar "
11880 "default INTEGER variable", &code
->expr1
->where
);
11883 case EXEC_POINTER_ASSIGN
:
11890 /* This is both a variable definition and pointer assignment
11891 context, so check both of them. For rank remapping, a final
11892 array ref may be present on the LHS and fool gfc_expr_attr
11893 used in gfc_check_vardef_context. Remove it. */
11894 e
= remove_last_array_ref (code
->expr1
);
11895 t
= gfc_check_vardef_context (e
, true, false, false,
11896 _("pointer assignment"));
11898 t
= gfc_check_vardef_context (e
, false, false, false,
11899 _("pointer assignment"));
11902 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11907 /* Assigning a class object always is a regular assign. */
11908 if (code
->expr2
->ts
.type
== BT_CLASS
11909 && code
->expr1
->ts
.type
== BT_CLASS
11910 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11911 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11912 && code
->expr2
->expr_type
== EXPR_VARIABLE
11913 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11915 code
->op
= EXEC_ASSIGN
;
11919 case EXEC_ARITHMETIC_IF
:
11921 gfc_expr
*e
= code
->expr1
;
11923 gfc_resolve_expr (e
);
11924 if (e
->expr_type
== EXPR_NULL
)
11925 gfc_error ("Invalid NULL at %L", &e
->where
);
11927 if (t
&& (e
->rank
> 0
11928 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11929 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11930 "REAL or INTEGER expression", &e
->where
);
11932 resolve_branch (code
->label1
, code
);
11933 resolve_branch (code
->label2
, code
);
11934 resolve_branch (code
->label3
, code
);
11939 if (t
&& code
->expr1
!= NULL
11940 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11941 || code
->expr1
->rank
!= 0))
11942 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11943 &code
->expr1
->where
);
11948 resolve_call (code
);
11951 case EXEC_COMPCALL
:
11953 resolve_typebound_subroutine (code
);
11956 case EXEC_CALL_PPC
:
11957 resolve_ppc_call (code
);
11961 /* Select is complicated. Also, a SELECT construct could be
11962 a transformed computed GOTO. */
11963 resolve_select (code
, false);
11966 case EXEC_SELECT_TYPE
:
11967 resolve_select_type (code
, ns
);
11970 case EXEC_SELECT_RANK
:
11971 resolve_select_rank (code
, ns
);
11975 resolve_block_construct (code
);
11979 if (code
->ext
.iterator
!= NULL
)
11981 gfc_iterator
*iter
= code
->ext
.iterator
;
11982 if (gfc_resolve_iterator (iter
, true, false))
11983 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11988 case EXEC_DO_WHILE
:
11989 if (code
->expr1
== NULL
)
11990 gfc_internal_error ("gfc_resolve_code(): No expression on "
11993 && (code
->expr1
->rank
!= 0
11994 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11995 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11996 "a scalar LOGICAL expression", &code
->expr1
->where
);
11999 case EXEC_ALLOCATE
:
12001 resolve_allocate_deallocate (code
, "ALLOCATE");
12005 case EXEC_DEALLOCATE
:
12007 resolve_allocate_deallocate (code
, "DEALLOCATE");
12012 if (!gfc_resolve_open (code
->ext
.open
, &code
->loc
))
12015 resolve_branch (code
->ext
.open
->err
, code
);
12019 if (!gfc_resolve_close (code
->ext
.close
, &code
->loc
))
12022 resolve_branch (code
->ext
.close
->err
, code
);
12025 case EXEC_BACKSPACE
:
12029 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
12032 resolve_branch (code
->ext
.filepos
->err
, code
);
12036 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12039 resolve_branch (code
->ext
.inquire
->err
, code
);
12042 case EXEC_IOLENGTH
:
12043 gcc_assert (code
->ext
.inquire
!= NULL
);
12044 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12047 resolve_branch (code
->ext
.inquire
->err
, code
);
12051 if (!gfc_resolve_wait (code
->ext
.wait
))
12054 resolve_branch (code
->ext
.wait
->err
, code
);
12055 resolve_branch (code
->ext
.wait
->end
, code
);
12056 resolve_branch (code
->ext
.wait
->eor
, code
);
12061 if (!gfc_resolve_dt (code
, code
->ext
.dt
, &code
->loc
))
12064 resolve_branch (code
->ext
.dt
->err
, code
);
12065 resolve_branch (code
->ext
.dt
->end
, code
);
12066 resolve_branch (code
->ext
.dt
->eor
, code
);
12069 case EXEC_TRANSFER
:
12070 resolve_transfer (code
);
12073 case EXEC_DO_CONCURRENT
:
12075 resolve_forall_iterators (code
->ext
.forall_iterator
);
12077 if (code
->expr1
!= NULL
12078 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12079 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12080 "expression", &code
->expr1
->where
);
12083 case EXEC_OACC_PARALLEL_LOOP
:
12084 case EXEC_OACC_PARALLEL
:
12085 case EXEC_OACC_KERNELS_LOOP
:
12086 case EXEC_OACC_KERNELS
:
12087 case EXEC_OACC_SERIAL_LOOP
:
12088 case EXEC_OACC_SERIAL
:
12089 case EXEC_OACC_DATA
:
12090 case EXEC_OACC_HOST_DATA
:
12091 case EXEC_OACC_LOOP
:
12092 case EXEC_OACC_UPDATE
:
12093 case EXEC_OACC_WAIT
:
12094 case EXEC_OACC_CACHE
:
12095 case EXEC_OACC_ENTER_DATA
:
12096 case EXEC_OACC_EXIT_DATA
:
12097 case EXEC_OACC_ATOMIC
:
12098 case EXEC_OACC_DECLARE
:
12099 gfc_resolve_oacc_directive (code
, ns
);
12102 case EXEC_OMP_ATOMIC
:
12103 case EXEC_OMP_BARRIER
:
12104 case EXEC_OMP_CANCEL
:
12105 case EXEC_OMP_CANCELLATION_POINT
:
12106 case EXEC_OMP_CRITICAL
:
12107 case EXEC_OMP_FLUSH
:
12108 case EXEC_OMP_DISTRIBUTE
:
12109 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12110 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12111 case EXEC_OMP_DISTRIBUTE_SIMD
:
12113 case EXEC_OMP_DO_SIMD
:
12114 case EXEC_OMP_MASTER
:
12115 case EXEC_OMP_ORDERED
:
12116 case EXEC_OMP_SECTIONS
:
12117 case EXEC_OMP_SIMD
:
12118 case EXEC_OMP_SINGLE
:
12119 case EXEC_OMP_TARGET
:
12120 case EXEC_OMP_TARGET_DATA
:
12121 case EXEC_OMP_TARGET_ENTER_DATA
:
12122 case EXEC_OMP_TARGET_EXIT_DATA
:
12123 case EXEC_OMP_TARGET_PARALLEL
:
12124 case EXEC_OMP_TARGET_PARALLEL_DO
:
12125 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12126 case EXEC_OMP_TARGET_SIMD
:
12127 case EXEC_OMP_TARGET_TEAMS
:
12128 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12129 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12130 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12131 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12132 case EXEC_OMP_TARGET_UPDATE
:
12133 case EXEC_OMP_TASK
:
12134 case EXEC_OMP_TASKGROUP
:
12135 case EXEC_OMP_TASKLOOP
:
12136 case EXEC_OMP_TASKLOOP_SIMD
:
12137 case EXEC_OMP_TASKWAIT
:
12138 case EXEC_OMP_TASKYIELD
:
12139 case EXEC_OMP_TEAMS
:
12140 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12141 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12142 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12143 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12144 case EXEC_OMP_WORKSHARE
:
12145 gfc_resolve_omp_directive (code
, ns
);
12148 case EXEC_OMP_PARALLEL
:
12149 case EXEC_OMP_PARALLEL_DO
:
12150 case EXEC_OMP_PARALLEL_DO_SIMD
:
12151 case EXEC_OMP_PARALLEL_SECTIONS
:
12152 case EXEC_OMP_PARALLEL_WORKSHARE
:
12153 omp_workshare_save
= omp_workshare_flag
;
12154 omp_workshare_flag
= 0;
12155 gfc_resolve_omp_directive (code
, ns
);
12156 omp_workshare_flag
= omp_workshare_save
;
12160 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12164 cs_base
= frame
.prev
;
12168 /* Resolve initial values and make sure they are compatible with
12172 resolve_values (gfc_symbol
*sym
)
12176 if (sym
->value
== NULL
)
12179 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12180 t
= resolve_structure_cons (sym
->value
, 1);
12182 t
= gfc_resolve_expr (sym
->value
);
12187 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12191 /* Verify any BIND(C) derived types in the namespace so we can report errors
12192 for them once, rather than for each variable declared of that type. */
12195 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12197 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12198 && derived_sym
->attr
.is_bind_c
== 1)
12199 verify_bind_c_derived_type (derived_sym
);
12205 /* Check the interfaces of DTIO procedures associated with derived
12206 type 'sym'. These procedures can either have typebound bindings or
12207 can appear in DTIO generic interfaces. */
12210 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12212 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12215 gfc_check_dtio_interfaces (sym
);
12220 /* Verify that any binding labels used in a given namespace do not collide
12221 with the names or binding labels of any global symbols. Multiple INTERFACE
12222 for the same procedure are permitted. */
12225 gfc_verify_binding_labels (gfc_symbol
*sym
)
12228 const char *module
;
12230 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12231 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12234 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12237 module
= sym
->module
;
12238 else if (sym
->ns
&& sym
->ns
->proc_name
12239 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12240 module
= sym
->ns
->proc_name
->name
;
12241 else if (sym
->ns
&& sym
->ns
->parent
12242 && sym
->ns
&& sym
->ns
->parent
->proc_name
12243 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12244 module
= sym
->ns
->parent
->proc_name
->name
;
12250 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12253 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12254 gsym
->where
= sym
->declared_at
;
12255 gsym
->sym_name
= sym
->name
;
12256 gsym
->binding_label
= sym
->binding_label
;
12257 gsym
->ns
= sym
->ns
;
12258 gsym
->mod_name
= module
;
12259 if (sym
->attr
.function
)
12260 gsym
->type
= GSYM_FUNCTION
;
12261 else if (sym
->attr
.subroutine
)
12262 gsym
->type
= GSYM_SUBROUTINE
;
12263 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12264 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12268 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12270 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12271 "identifier as entity at %L", sym
->name
,
12272 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12273 /* Clear the binding label to prevent checking multiple times. */
12274 sym
->binding_label
= NULL
;
12278 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12279 && (strcmp (module
, gsym
->mod_name
) != 0
12280 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12282 /* This can only happen if the variable is defined in a module - if it
12283 isn't the same module, reject it. */
12284 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12285 "uses the same global identifier as entity at %L from module %qs",
12286 sym
->name
, module
, sym
->binding_label
,
12287 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12288 sym
->binding_label
= NULL
;
12292 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12293 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12294 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12295 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12296 && (module
!= gsym
->mod_name
12297 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12298 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12300 /* Print an error if the procedure is defined multiple times; we have to
12301 exclude references to the same procedure via module association or
12302 multiple checks for the same procedure. */
12303 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12304 "global identifier as entity at %L", sym
->name
,
12305 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12306 sym
->binding_label
= NULL
;
12311 /* Resolve an index expression. */
12314 resolve_index_expr (gfc_expr
*e
)
12316 if (!gfc_resolve_expr (e
))
12319 if (!gfc_simplify_expr (e
, 0))
12322 if (!gfc_specification_expr (e
))
12329 /* Resolve a charlen structure. */
12332 resolve_charlen (gfc_charlen
*cl
)
12335 bool saved_specification_expr
;
12341 saved_specification_expr
= specification_expr
;
12342 specification_expr
= true;
12344 if (cl
->length_from_typespec
)
12346 if (!gfc_resolve_expr (cl
->length
))
12348 specification_expr
= saved_specification_expr
;
12352 if (!gfc_simplify_expr (cl
->length
, 0))
12354 specification_expr
= saved_specification_expr
;
12358 /* cl->length has been resolved. It should have an integer type. */
12359 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12361 gfc_error ("Scalar INTEGER expression expected at %L",
12362 &cl
->length
->where
);
12368 if (!resolve_index_expr (cl
->length
))
12370 specification_expr
= saved_specification_expr
;
12375 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12376 a negative value, the length of character entities declared is zero. */
12377 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12378 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12379 gfc_replace_expr (cl
->length
,
12380 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12382 /* Check that the character length is not too large. */
12383 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12384 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12385 && cl
->length
->ts
.type
== BT_INTEGER
12386 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12388 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12389 specification_expr
= saved_specification_expr
;
12393 specification_expr
= saved_specification_expr
;
12398 /* Test for non-constant shape arrays. */
12401 is_non_constant_shape_array (gfc_symbol
*sym
)
12407 not_constant
= false;
12408 if (sym
->as
!= NULL
)
12410 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12411 has not been simplified; parameter array references. Do the
12412 simplification now. */
12413 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12415 if (i
== GFC_MAX_DIMENSIONS
)
12418 e
= sym
->as
->lower
[i
];
12419 if (e
&& (!resolve_index_expr(e
)
12420 || !gfc_is_constant_expr (e
)))
12421 not_constant
= true;
12422 e
= sym
->as
->upper
[i
];
12423 if (e
&& (!resolve_index_expr(e
)
12424 || !gfc_is_constant_expr (e
)))
12425 not_constant
= true;
12428 return not_constant
;
12431 /* Given a symbol and an initialization expression, add code to initialize
12432 the symbol to the function entry. */
12434 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12438 gfc_namespace
*ns
= sym
->ns
;
12440 /* Search for the function namespace if this is a contained
12441 function without an explicit result. */
12442 if (sym
->attr
.function
&& sym
== sym
->result
12443 && sym
->name
!= sym
->ns
->proc_name
->name
)
12445 ns
= ns
->contained
;
12446 for (;ns
; ns
= ns
->sibling
)
12447 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12453 gfc_free_expr (init
);
12457 /* Build an l-value expression for the result. */
12458 lval
= gfc_lval_expr_from_sym (sym
);
12460 /* Add the code at scope entry. */
12461 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12462 init_st
->next
= ns
->code
;
12463 ns
->code
= init_st
;
12465 /* Assign the default initializer to the l-value. */
12466 init_st
->loc
= sym
->declared_at
;
12467 init_st
->expr1
= lval
;
12468 init_st
->expr2
= init
;
12472 /* Whether or not we can generate a default initializer for a symbol. */
12475 can_generate_init (gfc_symbol
*sym
)
12477 symbol_attribute
*a
;
12482 /* These symbols should never have a default initialization. */
12487 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12488 && (CLASS_DATA (sym
)->attr
.class_pointer
12489 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12490 || a
->in_equivalence
12497 || (!a
->referenced
&& !a
->result
)
12498 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12499 || (a
->function
&& sym
!= sym
->result
)
12504 /* Assign the default initializer to a derived type variable or result. */
12507 apply_default_init (gfc_symbol
*sym
)
12509 gfc_expr
*init
= NULL
;
12511 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12514 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12515 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12517 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12520 build_init_assign (sym
, init
);
12521 sym
->attr
.referenced
= 1;
12525 /* Build an initializer for a local. Returns null if the symbol should not have
12526 a default initialization. */
12529 build_default_init_expr (gfc_symbol
*sym
)
12531 /* These symbols should never have a default initialization. */
12532 if (sym
->attr
.allocatable
12533 || sym
->attr
.external
12535 || sym
->attr
.pointer
12536 || sym
->attr
.in_equivalence
12537 || sym
->attr
.in_common
12540 || sym
->attr
.cray_pointee
12541 || sym
->attr
.cray_pointer
12545 /* Get the appropriate init expression. */
12546 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12549 /* Add an initialization expression to a local variable. */
12551 apply_default_init_local (gfc_symbol
*sym
)
12553 gfc_expr
*init
= NULL
;
12555 /* The symbol should be a variable or a function return value. */
12556 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12557 || (sym
->attr
.function
&& sym
->result
!= sym
))
12560 /* Try to build the initializer expression. If we can't initialize
12561 this symbol, then init will be NULL. */
12562 init
= build_default_init_expr (sym
);
12566 /* For saved variables, we don't want to add an initializer at function
12567 entry, so we just add a static initializer. Note that automatic variables
12568 are stack allocated even with -fno-automatic; we have also to exclude
12569 result variable, which are also nonstatic. */
12570 if (!sym
->attr
.automatic
12571 && (sym
->attr
.save
|| sym
->ns
->save_all
12572 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12573 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12574 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12576 /* Don't clobber an existing initializer! */
12577 gcc_assert (sym
->value
== NULL
);
12582 build_init_assign (sym
, init
);
12586 /* Resolution of common features of flavors variable and procedure. */
12589 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12591 gfc_array_spec
*as
;
12593 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12594 as
= CLASS_DATA (sym
)->as
;
12598 /* Constraints on deferred shape variable. */
12599 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12601 bool pointer
, allocatable
, dimension
;
12603 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12605 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12606 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12607 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12611 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12612 allocatable
= sym
->attr
.allocatable
;
12613 dimension
= sym
->attr
.dimension
;
12618 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12620 gfc_error ("Allocatable array %qs at %L must have a deferred "
12621 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12624 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12625 "%qs at %L may not be ALLOCATABLE",
12626 sym
->name
, &sym
->declared_at
))
12630 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12632 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12633 "assumed rank", sym
->name
, &sym
->declared_at
);
12640 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12641 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12643 gfc_error ("Array %qs at %L cannot have a deferred shape",
12644 sym
->name
, &sym
->declared_at
);
12649 /* Constraints on polymorphic variables. */
12650 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12653 if (sym
->attr
.class_ok
12654 && !sym
->attr
.select_type_temporary
12655 && !UNLIMITED_POLY (sym
)
12656 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12658 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12659 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12660 &sym
->declared_at
);
12665 /* Assume that use associated symbols were checked in the module ns.
12666 Class-variables that are associate-names are also something special
12667 and excepted from the test. */
12668 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12670 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12671 "or pointer", sym
->name
, &sym
->declared_at
);
12680 /* Additional checks for symbols with flavor variable and derived
12681 type. To be called from resolve_fl_variable. */
12684 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12686 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12688 /* Check to see if a derived type is blocked from being host
12689 associated by the presence of another class I symbol in the same
12690 namespace. 14.6.1.3 of the standard and the discussion on
12691 comp.lang.fortran. */
12692 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12693 && !sym
->ts
.u
.derived
->attr
.use_assoc
12694 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12697 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12698 if (s
&& s
->attr
.generic
)
12699 s
= gfc_find_dt_in_generic (s
);
12700 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12702 gfc_error ("The type %qs cannot be host associated at %L "
12703 "because it is blocked by an incompatible object "
12704 "of the same name declared at %L",
12705 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12711 /* 4th constraint in section 11.3: "If an object of a type for which
12712 component-initialization is specified (R429) appears in the
12713 specification-part of a module and does not have the ALLOCATABLE
12714 or POINTER attribute, the object shall have the SAVE attribute."
12716 The check for initializers is performed with
12717 gfc_has_default_initializer because gfc_default_initializer generates
12718 a hidden default for allocatable components. */
12719 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12720 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12721 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12722 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12723 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12724 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12725 "%qs at %L, needed due to the default "
12726 "initialization", sym
->name
, &sym
->declared_at
))
12729 /* Assign default initializer. */
12730 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12731 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12732 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12738 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12739 except in the declaration of an entity or component that has the POINTER
12740 or ALLOCATABLE attribute. */
12743 deferred_requirements (gfc_symbol
*sym
)
12745 if (sym
->ts
.deferred
12746 && !(sym
->attr
.pointer
12747 || sym
->attr
.allocatable
12748 || sym
->attr
.associate_var
12749 || sym
->attr
.omp_udr_artificial_var
))
12751 /* If a function has a result variable, only check the variable. */
12752 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12755 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12756 "requires either the POINTER or ALLOCATABLE attribute",
12757 sym
->name
, &sym
->declared_at
);
12764 /* Resolve symbols with flavor variable. */
12767 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12769 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12772 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12775 /* Set this flag to check that variables are parameters of all entries.
12776 This check is effected by the call to gfc_resolve_expr through
12777 is_non_constant_shape_array. */
12778 bool saved_specification_expr
= specification_expr
;
12779 specification_expr
= true;
12781 if (sym
->ns
->proc_name
12782 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12783 || sym
->ns
->proc_name
->attr
.is_main_program
)
12784 && !sym
->attr
.use_assoc
12785 && !sym
->attr
.allocatable
12786 && !sym
->attr
.pointer
12787 && is_non_constant_shape_array (sym
))
12789 /* F08:C541. The shape of an array defined in a main program or module
12790 * needs to be constant. */
12791 gfc_error ("The module or main program array %qs at %L must "
12792 "have constant shape", sym
->name
, &sym
->declared_at
);
12793 specification_expr
= saved_specification_expr
;
12797 /* Constraints on deferred type parameter. */
12798 if (!deferred_requirements (sym
))
12801 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12803 /* Make sure that character string variables with assumed length are
12804 dummy arguments. */
12805 gfc_expr
*e
= NULL
;
12808 e
= sym
->ts
.u
.cl
->length
;
12812 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12813 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12814 && !sym
->attr
.omp_udr_artificial_var
)
12816 gfc_error ("Entity with assumed character length at %L must be a "
12817 "dummy argument or a PARAMETER", &sym
->declared_at
);
12818 specification_expr
= saved_specification_expr
;
12822 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12824 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12825 specification_expr
= saved_specification_expr
;
12829 if (!gfc_is_constant_expr (e
)
12830 && !(e
->expr_type
== EXPR_VARIABLE
12831 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12833 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12834 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12835 || sym
->ns
->proc_name
->attr
.is_main_program
))
12837 gfc_error ("%qs at %L must have constant character length "
12838 "in this context", sym
->name
, &sym
->declared_at
);
12839 specification_expr
= saved_specification_expr
;
12842 if (sym
->attr
.in_common
)
12844 gfc_error ("COMMON variable %qs at %L must have constant "
12845 "character length", sym
->name
, &sym
->declared_at
);
12846 specification_expr
= saved_specification_expr
;
12852 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12853 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12855 /* Determine if the symbol may not have an initializer. */
12856 int no_init_flag
= 0, automatic_flag
= 0;
12857 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12858 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12860 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12861 && is_non_constant_shape_array (sym
))
12863 no_init_flag
= automatic_flag
= 1;
12865 /* Also, they must not have the SAVE attribute.
12866 SAVE_IMPLICIT is checked below. */
12867 if (sym
->as
&& sym
->attr
.codimension
)
12869 int corank
= sym
->as
->corank
;
12870 sym
->as
->corank
= 0;
12871 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12872 sym
->as
->corank
= corank
;
12874 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12876 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12877 specification_expr
= saved_specification_expr
;
12882 /* Ensure that any initializer is simplified. */
12884 gfc_simplify_expr (sym
->value
, 1);
12886 /* Reject illegal initializers. */
12887 if (!sym
->mark
&& sym
->value
)
12889 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12890 && CLASS_DATA (sym
)->attr
.allocatable
))
12891 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12892 sym
->name
, &sym
->declared_at
);
12893 else if (sym
->attr
.external
)
12894 gfc_error ("External %qs at %L cannot have an initializer",
12895 sym
->name
, &sym
->declared_at
);
12896 else if (sym
->attr
.dummy
12897 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12898 gfc_error ("Dummy %qs at %L cannot have an initializer",
12899 sym
->name
, &sym
->declared_at
);
12900 else if (sym
->attr
.intrinsic
)
12901 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12902 sym
->name
, &sym
->declared_at
);
12903 else if (sym
->attr
.result
)
12904 gfc_error ("Function result %qs at %L cannot have an initializer",
12905 sym
->name
, &sym
->declared_at
);
12906 else if (automatic_flag
)
12907 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12908 sym
->name
, &sym
->declared_at
);
12910 goto no_init_error
;
12911 specification_expr
= saved_specification_expr
;
12916 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12918 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12919 specification_expr
= saved_specification_expr
;
12923 specification_expr
= saved_specification_expr
;
12928 /* Compare the dummy characteristics of a module procedure interface
12929 declaration with the corresponding declaration in a submodule. */
12930 static gfc_formal_arglist
*new_formal
;
12931 static char errmsg
[200];
12934 compare_fsyms (gfc_symbol
*sym
)
12938 if (sym
== NULL
|| new_formal
== NULL
)
12941 fsym
= new_formal
->sym
;
12946 if (strcmp (sym
->name
, fsym
->name
) == 0)
12948 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12949 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12954 /* Resolve a procedure. */
12957 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12959 gfc_formal_arglist
*arg
;
12961 if (sym
->attr
.function
12962 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12965 /* Constraints on deferred type parameter. */
12966 if (!deferred_requirements (sym
))
12969 if (sym
->ts
.type
== BT_CHARACTER
)
12971 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12973 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12974 && !resolve_charlen (cl
))
12977 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12978 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12980 gfc_error ("Character-valued statement function %qs at %L must "
12981 "have constant length", sym
->name
, &sym
->declared_at
);
12986 /* Ensure that derived type for are not of a private type. Internal
12987 module procedures are excluded by 2.2.3.3 - i.e., they are not
12988 externally accessible and can access all the objects accessible in
12990 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12991 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12992 && gfc_check_symbol_access (sym
))
12994 gfc_interface
*iface
;
12996 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12999 && arg
->sym
->ts
.type
== BT_DERIVED
13000 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13001 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13002 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
13003 "and cannot be a dummy argument"
13004 " of %qs, which is PUBLIC at %L",
13005 arg
->sym
->name
, sym
->name
,
13006 &sym
->declared_at
))
13008 /* Stop this message from recurring. */
13009 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13014 /* PUBLIC interfaces may expose PRIVATE procedures that take types
13015 PRIVATE to the containing module. */
13016 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
13018 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
13021 && arg
->sym
->ts
.type
== BT_DERIVED
13022 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13023 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13024 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
13025 "PUBLIC interface %qs at %L "
13026 "takes dummy arguments of %qs which "
13027 "is PRIVATE", iface
->sym
->name
,
13028 sym
->name
, &iface
->sym
->declared_at
,
13029 gfc_typename(&arg
->sym
->ts
)))
13031 /* Stop this message from recurring. */
13032 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13039 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
13040 && !sym
->attr
.proc_pointer
)
13042 gfc_error ("Function %qs at %L cannot have an initializer",
13043 sym
->name
, &sym
->declared_at
);
13045 /* Make sure no second error is issued for this. */
13046 sym
->value
->error
= 1;
13050 /* An external symbol may not have an initializer because it is taken to be
13051 a procedure. Exception: Procedure Pointers. */
13052 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
13054 gfc_error ("External object %qs at %L may not have an initializer",
13055 sym
->name
, &sym
->declared_at
);
13059 /* An elemental function is required to return a scalar 12.7.1 */
13060 if (sym
->attr
.elemental
&& sym
->attr
.function
13061 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
13063 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
13064 "result", sym
->name
, &sym
->declared_at
);
13065 /* Reset so that the error only occurs once. */
13066 sym
->attr
.elemental
= 0;
13070 if (sym
->attr
.proc
== PROC_ST_FUNCTION
13071 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
13073 gfc_error ("Statement function %qs at %L may not have pointer or "
13074 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13078 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13079 char-len-param shall not be array-valued, pointer-valued, recursive
13080 or pure. ....snip... A character value of * may only be used in the
13081 following ways: (i) Dummy arg of procedure - dummy associates with
13082 actual length; (ii) To declare a named constant; or (iii) External
13083 function - but length must be declared in calling scoping unit. */
13084 if (sym
->attr
.function
13085 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13086 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13088 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13089 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13091 if (sym
->as
&& sym
->as
->rank
)
13092 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13093 "array-valued", sym
->name
, &sym
->declared_at
);
13095 if (sym
->attr
.pointer
)
13096 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13097 "pointer-valued", sym
->name
, &sym
->declared_at
);
13099 if (sym
->attr
.pure
)
13100 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13101 "pure", sym
->name
, &sym
->declared_at
);
13103 if (sym
->attr
.recursive
)
13104 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13105 "recursive", sym
->name
, &sym
->declared_at
);
13110 /* Appendix B.2 of the standard. Contained functions give an
13111 error anyway. Deferred character length is an F2003 feature.
13112 Don't warn on intrinsic conversion functions, which start
13113 with two underscores. */
13114 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13115 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13116 gfc_notify_std (GFC_STD_F95_OBS
,
13117 "CHARACTER(*) function %qs at %L",
13118 sym
->name
, &sym
->declared_at
);
13121 /* F2008, C1218. */
13122 if (sym
->attr
.elemental
)
13124 if (sym
->attr
.proc_pointer
)
13126 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13127 sym
->name
, &sym
->declared_at
);
13130 if (sym
->attr
.dummy
)
13132 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13133 sym
->name
, &sym
->declared_at
);
13138 /* F2018, C15100: "The result of an elemental function shall be scalar,
13139 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13140 pointer is tested and caught elsewhere. */
13141 if (sym
->attr
.elemental
&& sym
->result
13142 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13144 gfc_error ("Function result variable %qs at %L of elemental "
13145 "function %qs shall not have an ALLOCATABLE or POINTER "
13146 "attribute", sym
->result
->name
,
13147 &sym
->result
->declared_at
, sym
->name
);
13151 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13153 gfc_formal_arglist
*curr_arg
;
13154 int has_non_interop_arg
= 0;
13156 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13157 sym
->common_block
))
13159 /* Clear these to prevent looking at them again if there was an
13161 sym
->attr
.is_bind_c
= 0;
13162 sym
->attr
.is_c_interop
= 0;
13163 sym
->ts
.is_c_interop
= 0;
13167 /* So far, no errors have been found. */
13168 sym
->attr
.is_c_interop
= 1;
13169 sym
->ts
.is_c_interop
= 1;
13172 curr_arg
= gfc_sym_get_dummy_args (sym
);
13173 while (curr_arg
!= NULL
)
13175 /* Skip implicitly typed dummy args here. */
13176 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13177 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13178 /* If something is found to fail, record the fact so we
13179 can mark the symbol for the procedure as not being
13180 BIND(C) to try and prevent multiple errors being
13182 has_non_interop_arg
= 1;
13184 curr_arg
= curr_arg
->next
;
13187 /* See if any of the arguments were not interoperable and if so, clear
13188 the procedure symbol to prevent duplicate error messages. */
13189 if (has_non_interop_arg
!= 0)
13191 sym
->attr
.is_c_interop
= 0;
13192 sym
->ts
.is_c_interop
= 0;
13193 sym
->attr
.is_bind_c
= 0;
13197 if (!sym
->attr
.proc_pointer
)
13199 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13201 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13202 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13205 if (sym
->attr
.intent
)
13207 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13208 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13211 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13213 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13214 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13217 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13218 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13219 || sym
->attr
.contained
))
13221 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13222 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13225 if (strcmp ("ppr@", sym
->name
) == 0)
13227 gfc_error ("Procedure pointer result %qs at %L "
13228 "is missing the pointer attribute",
13229 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13234 /* Assume that a procedure whose body is not known has references
13235 to external arrays. */
13236 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13237 sym
->attr
.array_outer_dependency
= 1;
13239 /* Compare the characteristics of a module procedure with the
13240 interface declaration. Ideally this would be done with
13241 gfc_compare_interfaces but, at present, the formal interface
13242 cannot be copied to the ts.interface. */
13243 if (sym
->attr
.module_procedure
13244 && sym
->attr
.if_source
== IFSRC_DECL
)
13247 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13249 char *submodule_name
;
13250 strcpy (name
, sym
->ns
->proc_name
->name
);
13251 module_name
= strtok (name
, ".");
13252 submodule_name
= strtok (NULL
, ".");
13254 iface
= sym
->tlink
;
13257 /* Make sure that the result uses the correct charlen for deferred
13259 if (iface
&& sym
->result
13260 && iface
->ts
.type
== BT_CHARACTER
13261 && iface
->ts
.deferred
)
13262 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13267 /* Check the procedure characteristics. */
13268 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13270 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13271 "PROCEDURE at %L and its interface in %s",
13272 &sym
->declared_at
, module_name
);
13276 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13278 gfc_error ("Mismatch in PURE attribute between MODULE "
13279 "PROCEDURE at %L and its interface in %s",
13280 &sym
->declared_at
, module_name
);
13284 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13286 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13287 "PROCEDURE at %L and its interface in %s",
13288 &sym
->declared_at
, module_name
);
13292 /* Check the result characteristics. */
13293 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13295 gfc_error ("%s between the MODULE PROCEDURE declaration "
13296 "in MODULE %qs and the declaration at %L in "
13298 errmsg
, module_name
, &sym
->declared_at
,
13299 submodule_name
? submodule_name
: module_name
);
13304 /* Check the characteristics of the formal arguments. */
13305 if (sym
->formal
&& sym
->formal_ns
)
13307 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13310 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13318 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13319 been defined and we now know their defined arguments, check that they fulfill
13320 the requirements of the standard for procedures used as finalizers. */
13323 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13325 gfc_finalizer
* list
;
13326 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13327 bool result
= true;
13328 bool seen_scalar
= false;
13331 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13334 gfc_resolve_finalizers (parent
, finalizable
);
13336 /* Ensure that derived-type components have a their finalizers resolved. */
13337 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13338 for (c
= derived
->components
; c
; c
= c
->next
)
13339 if (c
->ts
.type
== BT_DERIVED
13340 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13342 bool has_final2
= false;
13343 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13344 return false; /* Error. */
13345 has_final
= has_final
|| has_final2
;
13347 /* Return early if not finalizable. */
13351 *finalizable
= false;
13355 /* Walk over the list of finalizer-procedures, check them, and if any one
13356 does not fit in with the standard's definition, print an error and remove
13357 it from the list. */
13358 prev_link
= &derived
->f2k_derived
->finalizers
;
13359 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13361 gfc_formal_arglist
*dummy_args
;
13366 /* Skip this finalizer if we already resolved it. */
13367 if (list
->proc_tree
)
13369 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13370 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13371 seen_scalar
= true;
13372 prev_link
= &(list
->next
);
13376 /* Check this exists and is a SUBROUTINE. */
13377 if (!list
->proc_sym
->attr
.subroutine
)
13379 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13380 list
->proc_sym
->name
, &list
->where
);
13384 /* We should have exactly one argument. */
13385 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13386 if (!dummy_args
|| dummy_args
->next
)
13388 gfc_error ("FINAL procedure at %L must have exactly one argument",
13392 arg
= dummy_args
->sym
;
13394 /* This argument must be of our type. */
13395 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13397 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13398 &arg
->declared_at
, derived
->name
);
13402 /* It must neither be a pointer nor allocatable nor optional. */
13403 if (arg
->attr
.pointer
)
13405 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13406 &arg
->declared_at
);
13409 if (arg
->attr
.allocatable
)
13411 gfc_error ("Argument of FINAL procedure at %L must not be"
13412 " ALLOCATABLE", &arg
->declared_at
);
13415 if (arg
->attr
.optional
)
13417 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13418 &arg
->declared_at
);
13422 /* It must not be INTENT(OUT). */
13423 if (arg
->attr
.intent
== INTENT_OUT
)
13425 gfc_error ("Argument of FINAL procedure at %L must not be"
13426 " INTENT(OUT)", &arg
->declared_at
);
13430 /* Warn if the procedure is non-scalar and not assumed shape. */
13431 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13432 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13433 gfc_warning (OPT_Wsurprising
,
13434 "Non-scalar FINAL procedure at %L should have assumed"
13435 " shape argument", &arg
->declared_at
);
13437 /* Check that it does not match in kind and rank with a FINAL procedure
13438 defined earlier. To really loop over the *earlier* declarations,
13439 we need to walk the tail of the list as new ones were pushed at the
13441 /* TODO: Handle kind parameters once they are implemented. */
13442 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13443 for (i
= list
->next
; i
; i
= i
->next
)
13445 gfc_formal_arglist
*dummy_args
;
13447 /* Argument list might be empty; that is an error signalled earlier,
13448 but we nevertheless continued resolving. */
13449 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13452 gfc_symbol
* i_arg
= dummy_args
->sym
;
13453 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13454 if (i_rank
== my_rank
)
13456 gfc_error ("FINAL procedure %qs declared at %L has the same"
13457 " rank (%d) as %qs",
13458 list
->proc_sym
->name
, &list
->where
, my_rank
,
13459 i
->proc_sym
->name
);
13465 /* Is this the/a scalar finalizer procedure? */
13467 seen_scalar
= true;
13469 /* Find the symtree for this procedure. */
13470 gcc_assert (!list
->proc_tree
);
13471 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13473 prev_link
= &list
->next
;
13476 /* Remove wrong nodes immediately from the list so we don't risk any
13477 troubles in the future when they might fail later expectations. */
13480 *prev_link
= list
->next
;
13481 gfc_free_finalizer (i
);
13485 if (result
== false)
13488 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13489 were nodes in the list, must have been for arrays. It is surely a good
13490 idea to have a scalar version there if there's something to finalize. */
13491 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13492 gfc_warning (OPT_Wsurprising
,
13493 "Only array FINAL procedures declared for derived type %qs"
13494 " defined at %L, suggest also scalar one",
13495 derived
->name
, &derived
->declared_at
);
13497 vtab
= gfc_find_derived_vtab (derived
);
13498 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13499 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13502 *finalizable
= true;
13508 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13511 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13512 const char* generic_name
, locus where
)
13514 gfc_symbol
*sym1
, *sym2
;
13515 const char *pass1
, *pass2
;
13516 gfc_formal_arglist
*dummy_args
;
13518 gcc_assert (t1
->specific
&& t2
->specific
);
13519 gcc_assert (!t1
->specific
->is_generic
);
13520 gcc_assert (!t2
->specific
->is_generic
);
13521 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13523 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13524 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13529 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13530 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13531 || sym1
->attr
.function
!= sym2
->attr
.function
)
13533 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13534 " GENERIC %qs at %L",
13535 sym1
->name
, sym2
->name
, generic_name
, &where
);
13539 /* Determine PASS arguments. */
13540 if (t1
->specific
->nopass
)
13542 else if (t1
->specific
->pass_arg
)
13543 pass1
= t1
->specific
->pass_arg
;
13546 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13548 pass1
= dummy_args
->sym
->name
;
13552 if (t2
->specific
->nopass
)
13554 else if (t2
->specific
->pass_arg
)
13555 pass2
= t2
->specific
->pass_arg
;
13558 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13560 pass2
= dummy_args
->sym
->name
;
13565 /* Compare the interfaces. */
13566 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13567 NULL
, 0, pass1
, pass2
))
13569 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13570 sym1
->name
, sym2
->name
, generic_name
, &where
);
13578 /* Worker function for resolving a generic procedure binding; this is used to
13579 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13581 The difference between those cases is finding possible inherited bindings
13582 that are overridden, as one has to look for them in tb_sym_root,
13583 tb_uop_root or tb_op, respectively. Thus the caller must already find
13584 the super-type and set p->overridden correctly. */
13587 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13588 gfc_typebound_proc
* p
, const char* name
)
13590 gfc_tbp_generic
* target
;
13591 gfc_symtree
* first_target
;
13592 gfc_symtree
* inherited
;
13594 gcc_assert (p
&& p
->is_generic
);
13596 /* Try to find the specific bindings for the symtrees in our target-list. */
13597 gcc_assert (p
->u
.generic
);
13598 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13599 if (!target
->specific
)
13601 gfc_typebound_proc
* overridden_tbp
;
13602 gfc_tbp_generic
* g
;
13603 const char* target_name
;
13605 target_name
= target
->specific_st
->name
;
13607 /* Defined for this type directly. */
13608 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13610 target
->specific
= target
->specific_st
->n
.tb
;
13611 goto specific_found
;
13614 /* Look for an inherited specific binding. */
13617 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13622 gcc_assert (inherited
->n
.tb
);
13623 target
->specific
= inherited
->n
.tb
;
13624 goto specific_found
;
13628 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13629 " at %L", target_name
, name
, &p
->where
);
13632 /* Once we've found the specific binding, check it is not ambiguous with
13633 other specifics already found or inherited for the same GENERIC. */
13635 gcc_assert (target
->specific
);
13637 /* This must really be a specific binding! */
13638 if (target
->specific
->is_generic
)
13640 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13641 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13645 /* Check those already resolved on this type directly. */
13646 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13647 if (g
!= target
&& g
->specific
13648 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13651 /* Check for ambiguity with inherited specific targets. */
13652 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13653 overridden_tbp
= overridden_tbp
->overridden
)
13654 if (overridden_tbp
->is_generic
)
13656 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13658 gcc_assert (g
->specific
);
13659 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13665 /* If we attempt to "overwrite" a specific binding, this is an error. */
13666 if (p
->overridden
&& !p
->overridden
->is_generic
)
13668 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13669 " the same name", name
, &p
->where
);
13673 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13674 all must have the same attributes here. */
13675 first_target
= p
->u
.generic
->specific
->u
.specific
;
13676 gcc_assert (first_target
);
13677 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13678 p
->function
= first_target
->n
.sym
->attr
.function
;
13684 /* Resolve a GENERIC procedure binding for a derived type. */
13687 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13689 gfc_symbol
* super_type
;
13691 /* Find the overridden binding if any. */
13692 st
->n
.tb
->overridden
= NULL
;
13693 super_type
= gfc_get_derived_super_type (derived
);
13696 gfc_symtree
* overridden
;
13697 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13700 if (overridden
&& overridden
->n
.tb
)
13701 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13704 /* Resolve using worker function. */
13705 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13709 /* Retrieve the target-procedure of an operator binding and do some checks in
13710 common for intrinsic and user-defined type-bound operators. */
13713 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13715 gfc_symbol
* target_proc
;
13717 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13718 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13719 gcc_assert (target_proc
);
13721 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13722 if (target
->specific
->nopass
)
13724 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13728 return target_proc
;
13732 /* Resolve a type-bound intrinsic operator. */
13735 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13736 gfc_typebound_proc
* p
)
13738 gfc_symbol
* super_type
;
13739 gfc_tbp_generic
* target
;
13741 /* If there's already an error here, do nothing (but don't fail again). */
13745 /* Operators should always be GENERIC bindings. */
13746 gcc_assert (p
->is_generic
);
13748 /* Look for an overridden binding. */
13749 super_type
= gfc_get_derived_super_type (derived
);
13750 if (super_type
&& super_type
->f2k_derived
)
13751 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13754 p
->overridden
= NULL
;
13756 /* Resolve general GENERIC properties using worker function. */
13757 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13760 /* Check the targets to be procedures of correct interface. */
13761 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13763 gfc_symbol
* target_proc
;
13765 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13769 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13772 /* Add target to non-typebound operator list. */
13773 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13774 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13776 gfc_interface
*head
, *intr
;
13778 /* Preempt 'gfc_check_new_interface' for submodules, where the
13779 mechanism for handling module procedures winds up resolving
13780 operator interfaces twice and would otherwise cause an error. */
13781 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13782 if (intr
->sym
== target_proc
13783 && target_proc
->attr
.used_in_submodule
)
13786 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13787 target_proc
, p
->where
))
13789 head
= derived
->ns
->op
[op
];
13790 intr
= gfc_get_interface ();
13791 intr
->sym
= target_proc
;
13792 intr
->where
= p
->where
;
13794 derived
->ns
->op
[op
] = intr
;
13806 /* Resolve a type-bound user operator (tree-walker callback). */
13808 static gfc_symbol
* resolve_bindings_derived
;
13809 static bool resolve_bindings_result
;
13811 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13814 resolve_typebound_user_op (gfc_symtree
* stree
)
13816 gfc_symbol
* super_type
;
13817 gfc_tbp_generic
* target
;
13819 gcc_assert (stree
&& stree
->n
.tb
);
13821 if (stree
->n
.tb
->error
)
13824 /* Operators should always be GENERIC bindings. */
13825 gcc_assert (stree
->n
.tb
->is_generic
);
13827 /* Find overridden procedure, if any. */
13828 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13829 if (super_type
&& super_type
->f2k_derived
)
13831 gfc_symtree
* overridden
;
13832 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13833 stree
->name
, true, NULL
);
13835 if (overridden
&& overridden
->n
.tb
)
13836 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13839 stree
->n
.tb
->overridden
= NULL
;
13841 /* Resolve basically using worker function. */
13842 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13845 /* Check the targets to be functions of correct interface. */
13846 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13848 gfc_symbol
* target_proc
;
13850 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13854 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13861 resolve_bindings_result
= false;
13862 stree
->n
.tb
->error
= 1;
13866 /* Resolve the type-bound procedures for a derived type. */
13869 resolve_typebound_procedure (gfc_symtree
* stree
)
13873 gfc_symbol
* me_arg
;
13874 gfc_symbol
* super_type
;
13875 gfc_component
* comp
;
13877 gcc_assert (stree
);
13879 /* Undefined specific symbol from GENERIC target definition. */
13883 if (stree
->n
.tb
->error
)
13886 /* If this is a GENERIC binding, use that routine. */
13887 if (stree
->n
.tb
->is_generic
)
13889 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13894 /* Get the target-procedure to check it. */
13895 gcc_assert (!stree
->n
.tb
->is_generic
);
13896 gcc_assert (stree
->n
.tb
->u
.specific
);
13897 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13898 where
= stree
->n
.tb
->where
;
13900 /* Default access should already be resolved from the parser. */
13901 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13903 if (stree
->n
.tb
->deferred
)
13905 if (!check_proc_interface (proc
, &where
))
13910 /* If proc has not been resolved at this point, proc->name may
13911 actually be a USE associated entity. See PR fortran/89647. */
13912 if (!proc
->resolved
13913 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13916 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13917 if (tmp
&& tmp
->attr
.use_assoc
)
13919 proc
->module
= tmp
->module
;
13920 proc
->attr
.proc
= tmp
->attr
.proc
;
13921 proc
->attr
.function
= tmp
->attr
.function
;
13922 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13923 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13924 proc
->ts
= tmp
->ts
;
13925 proc
->result
= tmp
->result
;
13929 /* Check for F08:C465. */
13930 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13931 || (proc
->attr
.proc
!= PROC_MODULE
13932 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13933 || proc
->attr
.abstract
)
13935 gfc_error ("%qs must be a module procedure or an external "
13936 "procedure with an explicit interface at %L",
13937 proc
->name
, &where
);
13942 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13943 stree
->n
.tb
->function
= proc
->attr
.function
;
13945 /* Find the super-type of the current derived type. We could do this once and
13946 store in a global if speed is needed, but as long as not I believe this is
13947 more readable and clearer. */
13948 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13950 /* If PASS, resolve and check arguments if not already resolved / loaded
13951 from a .mod file. */
13952 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13954 gfc_formal_arglist
*dummy_args
;
13956 dummy_args
= gfc_sym_get_dummy_args (proc
);
13957 if (stree
->n
.tb
->pass_arg
)
13959 gfc_formal_arglist
*i
;
13961 /* If an explicit passing argument name is given, walk the arg-list
13962 and look for it. */
13965 stree
->n
.tb
->pass_arg_num
= 1;
13966 for (i
= dummy_args
; i
; i
= i
->next
)
13968 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13973 ++stree
->n
.tb
->pass_arg_num
;
13978 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13980 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13981 stree
->n
.tb
->pass_arg
);
13987 /* Otherwise, take the first one; there should in fact be at least
13989 stree
->n
.tb
->pass_arg_num
= 1;
13992 gfc_error ("Procedure %qs with PASS at %L must have at"
13993 " least one argument", proc
->name
, &where
);
13996 me_arg
= dummy_args
->sym
;
13999 /* Now check that the argument-type matches and the passed-object
14000 dummy argument is generally fine. */
14002 gcc_assert (me_arg
);
14004 if (me_arg
->ts
.type
!= BT_CLASS
)
14006 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14007 " at %L", proc
->name
, &where
);
14011 if (CLASS_DATA (me_arg
)->ts
.u
.derived
14012 != resolve_bindings_derived
)
14014 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14015 " the derived-type %qs", me_arg
->name
, proc
->name
,
14016 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
14020 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
14021 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
14023 gfc_error ("Passed-object dummy argument of %qs at %L must be"
14024 " scalar", proc
->name
, &where
);
14027 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14029 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14030 " be ALLOCATABLE", proc
->name
, &where
);
14033 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14035 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14036 " be POINTER", proc
->name
, &where
);
14041 /* If we are extending some type, check that we don't override a procedure
14042 flagged NON_OVERRIDABLE. */
14043 stree
->n
.tb
->overridden
= NULL
;
14046 gfc_symtree
* overridden
;
14047 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
14048 stree
->name
, true, NULL
);
14052 if (overridden
->n
.tb
)
14053 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
14055 if (!gfc_check_typebound_override (stree
, overridden
))
14060 /* See if there's a name collision with a component directly in this type. */
14061 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
14062 if (!strcmp (comp
->name
, stree
->name
))
14064 gfc_error ("Procedure %qs at %L has the same name as a component of"
14066 stree
->name
, &where
, resolve_bindings_derived
->name
);
14070 /* Try to find a name collision with an inherited component. */
14071 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
14074 gfc_error ("Procedure %qs at %L has the same name as an inherited"
14075 " component of %qs",
14076 stree
->name
, &where
, resolve_bindings_derived
->name
);
14080 stree
->n
.tb
->error
= 0;
14084 resolve_bindings_result
= false;
14085 stree
->n
.tb
->error
= 1;
14090 resolve_typebound_procedures (gfc_symbol
* derived
)
14093 gfc_symbol
* super_type
;
14095 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14098 super_type
= gfc_get_derived_super_type (derived
);
14100 resolve_symbol (super_type
);
14102 resolve_bindings_derived
= derived
;
14103 resolve_bindings_result
= true;
14105 if (derived
->f2k_derived
->tb_sym_root
)
14106 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14107 &resolve_typebound_procedure
);
14109 if (derived
->f2k_derived
->tb_uop_root
)
14110 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14111 &resolve_typebound_user_op
);
14113 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14115 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14116 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14117 (gfc_intrinsic_op
)op
, p
))
14118 resolve_bindings_result
= false;
14121 return resolve_bindings_result
;
14125 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14126 to give all identical derived types the same backend_decl. */
14128 add_dt_to_dt_list (gfc_symbol
*derived
)
14130 if (!derived
->dt_next
)
14132 if (gfc_derived_types
)
14134 derived
->dt_next
= gfc_derived_types
->dt_next
;
14135 gfc_derived_types
->dt_next
= derived
;
14139 derived
->dt_next
= derived
;
14141 gfc_derived_types
= derived
;
14146 /* Ensure that a derived-type is really not abstract, meaning that every
14147 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14150 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14155 if (!ensure_not_abstract_walker (sub
, st
->left
))
14157 if (!ensure_not_abstract_walker (sub
, st
->right
))
14160 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14162 gfc_symtree
* overriding
;
14163 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14166 gcc_assert (overriding
->n
.tb
);
14167 if (overriding
->n
.tb
->deferred
)
14169 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14170 " %qs is DEFERRED and not overridden",
14171 sub
->name
, &sub
->declared_at
, st
->name
);
14180 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14182 /* The algorithm used here is to recursively travel up the ancestry of sub
14183 and for each ancestor-type, check all bindings. If any of them is
14184 DEFERRED, look it up starting from sub and see if the found (overriding)
14185 binding is not DEFERRED.
14186 This is not the most efficient way to do this, but it should be ok and is
14187 clearer than something sophisticated. */
14189 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14191 if (!ancestor
->attr
.abstract
)
14194 /* Walk bindings of this ancestor. */
14195 if (ancestor
->f2k_derived
)
14198 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14203 /* Find next ancestor type and recurse on it. */
14204 ancestor
= gfc_get_derived_super_type (ancestor
);
14206 return ensure_not_abstract (sub
, ancestor
);
14212 /* This check for typebound defined assignments is done recursively
14213 since the order in which derived types are resolved is not always in
14214 order of the declarations. */
14217 check_defined_assignments (gfc_symbol
*derived
)
14221 for (c
= derived
->components
; c
; c
= c
->next
)
14223 if (!gfc_bt_struct (c
->ts
.type
)
14225 || c
->attr
.allocatable
14226 || c
->attr
.proc_pointer_comp
14227 || c
->attr
.class_pointer
14228 || c
->attr
.proc_pointer
)
14231 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14232 || (c
->ts
.u
.derived
->f2k_derived
14233 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14235 derived
->attr
.defined_assign_comp
= 1;
14239 check_defined_assignments (c
->ts
.u
.derived
);
14240 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14242 derived
->attr
.defined_assign_comp
= 1;
14249 /* Resolve a single component of a derived type or structure. */
14252 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14254 gfc_symbol
*super_type
;
14255 symbol_attribute
*attr
;
14257 if (c
->attr
.artificial
)
14260 /* Do not allow vtype components to be resolved in nameless namespaces
14261 such as block data because the procedure pointers will cause ICEs
14262 and vtables are not needed in these contexts. */
14263 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14264 && sym
->ns
->proc_name
== NULL
)
14268 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14269 && c
->attr
.codimension
14270 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14272 gfc_error ("Coarray component %qs at %L must be allocatable with "
14273 "deferred shape", c
->name
, &c
->loc
);
14278 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14279 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14281 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14282 "shall not be a coarray", c
->name
, &c
->loc
);
14287 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14288 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14289 || c
->attr
.allocatable
))
14291 gfc_error ("Component %qs at %L with coarray component "
14292 "shall be a nonpointer, nonallocatable scalar",
14298 if (c
->ts
.type
== BT_CLASS
)
14300 if (CLASS_DATA (c
))
14302 attr
= &(CLASS_DATA (c
)->attr
);
14304 /* Fix up contiguous attribute. */
14305 if (c
->attr
.contiguous
)
14306 attr
->contiguous
= 1;
14314 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14316 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14317 "is not an array pointer", c
->name
, &c
->loc
);
14321 /* F2003, 15.2.1 - length has to be one. */
14322 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14323 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14324 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14325 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14327 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14332 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14334 gfc_symbol
*ifc
= c
->ts
.interface
;
14336 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14342 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14344 /* Resolve interface and copy attributes. */
14345 if (ifc
->formal
&& !ifc
->formal_ns
)
14346 resolve_symbol (ifc
);
14347 if (ifc
->attr
.intrinsic
)
14348 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14352 c
->ts
= ifc
->result
->ts
;
14353 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14354 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14355 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14356 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14357 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14362 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14363 c
->attr
.pointer
= ifc
->attr
.pointer
;
14364 c
->attr
.dimension
= ifc
->attr
.dimension
;
14365 c
->as
= gfc_copy_array_spec (ifc
->as
);
14366 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14368 c
->ts
.interface
= ifc
;
14369 c
->attr
.function
= ifc
->attr
.function
;
14370 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14372 c
->attr
.pure
= ifc
->attr
.pure
;
14373 c
->attr
.elemental
= ifc
->attr
.elemental
;
14374 c
->attr
.recursive
= ifc
->attr
.recursive
;
14375 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14376 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14377 /* Copy char length. */
14378 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14380 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14381 if (cl
->length
&& !cl
->resolved
14382 && !gfc_resolve_expr (cl
->length
))
14391 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14393 /* Since PPCs are not implicitly typed, a PPC without an explicit
14394 interface must be a subroutine. */
14395 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14398 /* Procedure pointer components: Check PASS arg. */
14399 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14400 && !sym
->attr
.vtype
)
14402 gfc_symbol
* me_arg
;
14404 if (c
->tb
->pass_arg
)
14406 gfc_formal_arglist
* i
;
14408 /* If an explicit passing argument name is given, walk the arg-list
14409 and look for it. */
14412 c
->tb
->pass_arg_num
= 1;
14413 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14415 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14420 c
->tb
->pass_arg_num
++;
14425 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14426 "at %L has no argument %qs", c
->name
,
14427 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14434 /* Otherwise, take the first one; there should in fact be at least
14436 c
->tb
->pass_arg_num
= 1;
14437 if (!c
->ts
.interface
->formal
)
14439 gfc_error ("Procedure pointer component %qs with PASS at %L "
14440 "must have at least one argument",
14445 me_arg
= c
->ts
.interface
->formal
->sym
;
14448 /* Now check that the argument-type matches. */
14449 gcc_assert (me_arg
);
14450 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14451 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14452 || (me_arg
->ts
.type
== BT_CLASS
14453 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14455 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14456 " the derived type %qs", me_arg
->name
, c
->name
,
14457 me_arg
->name
, &c
->loc
, sym
->name
);
14462 /* Check for F03:C453. */
14463 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14465 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14466 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14472 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14474 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14475 "may not have the POINTER attribute", me_arg
->name
,
14476 c
->name
, me_arg
->name
, &c
->loc
);
14481 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14483 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14484 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14485 me_arg
->name
, &c
->loc
);
14490 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14492 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14493 " at %L", c
->name
, &c
->loc
);
14499 /* Check type-spec if this is not the parent-type component. */
14500 if (((sym
->attr
.is_class
14501 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14502 || c
!= sym
->components
->ts
.u
.derived
->components
))
14503 || (!sym
->attr
.is_class
14504 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14505 && !sym
->attr
.vtype
14506 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14509 super_type
= gfc_get_derived_super_type (sym
);
14511 /* If this type is an extension, set the accessibility of the parent
14514 && ((sym
->attr
.is_class
14515 && c
== sym
->components
->ts
.u
.derived
->components
)
14516 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14517 && strcmp (super_type
->name
, c
->name
) == 0)
14518 c
->attr
.access
= super_type
->attr
.access
;
14520 /* If this type is an extension, see if this component has the same name
14521 as an inherited type-bound procedure. */
14522 if (super_type
&& !sym
->attr
.is_class
14523 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14525 gfc_error ("Component %qs of %qs at %L has the same name as an"
14526 " inherited type-bound procedure",
14527 c
->name
, sym
->name
, &c
->loc
);
14531 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14532 && !c
->ts
.deferred
)
14534 if (c
->ts
.u
.cl
->length
== NULL
14535 || (!resolve_charlen(c
->ts
.u
.cl
))
14536 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14538 gfc_error ("Character length of component %qs needs to "
14539 "be a constant specification expression at %L",
14541 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14546 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14547 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14549 gfc_error ("Character component %qs of %qs at %L with deferred "
14550 "length must be a POINTER or ALLOCATABLE",
14551 c
->name
, sym
->name
, &c
->loc
);
14555 /* Add the hidden deferred length field. */
14556 if (c
->ts
.type
== BT_CHARACTER
14557 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14558 && !c
->attr
.function
14559 && !sym
->attr
.is_class
)
14561 char name
[GFC_MAX_SYMBOL_LEN
+9];
14562 gfc_component
*strlen
;
14563 sprintf (name
, "_%s_length", c
->name
);
14564 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14565 if (strlen
== NULL
)
14567 if (!gfc_add_component (sym
, name
, &strlen
))
14569 strlen
->ts
.type
= BT_INTEGER
;
14570 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14571 strlen
->attr
.access
= ACCESS_PRIVATE
;
14572 strlen
->attr
.artificial
= 1;
14576 if (c
->ts
.type
== BT_DERIVED
14577 && sym
->component_access
!= ACCESS_PRIVATE
14578 && gfc_check_symbol_access (sym
)
14579 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14580 && !c
->ts
.u
.derived
->attr
.use_assoc
14581 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14582 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14583 "PRIVATE type and cannot be a component of "
14584 "%qs, which is PUBLIC at %L", c
->name
,
14585 sym
->name
, &sym
->declared_at
))
14588 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14590 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14591 "type %s", c
->name
, &c
->loc
, sym
->name
);
14595 if (sym
->attr
.sequence
)
14597 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14599 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14600 "not have the SEQUENCE attribute",
14601 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14606 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14607 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14608 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14609 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14610 CLASS_DATA (c
)->ts
.u
.derived
14611 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14613 /* If an allocatable component derived type is of the same type as
14614 the enclosing derived type, we need a vtable generating so that
14615 the __deallocate procedure is created. */
14616 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14617 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14618 gfc_find_vtab (&c
->ts
);
14620 /* Ensure that all the derived type components are put on the
14621 derived type list; even in formal namespaces, where derived type
14622 pointer components might not have been declared. */
14623 if (c
->ts
.type
== BT_DERIVED
14625 && c
->ts
.u
.derived
->components
14627 && sym
!= c
->ts
.u
.derived
)
14628 add_dt_to_dt_list (c
->ts
.u
.derived
);
14630 if (!gfc_resolve_array_spec (c
->as
,
14631 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14632 || c
->attr
.allocatable
)))
14635 if (c
->initializer
&& !sym
->attr
.vtype
14636 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14637 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14644 /* Be nice about the locus for a structure expression - show the locus of the
14645 first non-null sub-expression if we can. */
14648 cons_where (gfc_expr
*struct_expr
)
14650 gfc_constructor
*cons
;
14652 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14654 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14655 for (; cons
; cons
= gfc_constructor_next (cons
))
14657 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14658 return &cons
->expr
->where
;
14661 return &struct_expr
->where
;
14664 /* Resolve the components of a structure type. Much less work than derived
14668 resolve_fl_struct (gfc_symbol
*sym
)
14671 gfc_expr
*init
= NULL
;
14674 /* Make sure UNIONs do not have overlapping initializers. */
14675 if (sym
->attr
.flavor
== FL_UNION
)
14677 for (c
= sym
->components
; c
; c
= c
->next
)
14679 if (init
&& c
->initializer
)
14681 gfc_error ("Conflicting initializers in union at %L and %L",
14682 cons_where (init
), cons_where (c
->initializer
));
14683 gfc_free_expr (c
->initializer
);
14684 c
->initializer
= NULL
;
14687 init
= c
->initializer
;
14692 for (c
= sym
->components
; c
; c
= c
->next
)
14693 if (!resolve_component (c
, sym
))
14699 if (sym
->components
)
14700 add_dt_to_dt_list (sym
);
14706 /* Resolve the components of a derived type. This does not have to wait until
14707 resolution stage, but can be done as soon as the dt declaration has been
14711 resolve_fl_derived0 (gfc_symbol
*sym
)
14713 gfc_symbol
* super_type
;
14715 gfc_formal_arglist
*f
;
14718 if (sym
->attr
.unlimited_polymorphic
)
14721 super_type
= gfc_get_derived_super_type (sym
);
14724 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14726 gfc_error ("As extending type %qs at %L has a coarray component, "
14727 "parent type %qs shall also have one", sym
->name
,
14728 &sym
->declared_at
, super_type
->name
);
14732 /* Ensure the extended type gets resolved before we do. */
14733 if (super_type
&& !resolve_fl_derived0 (super_type
))
14736 /* An ABSTRACT type must be extensible. */
14737 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14739 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14740 sym
->name
, &sym
->declared_at
);
14744 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14748 for ( ; c
!= NULL
; c
= c
->next
)
14749 if (!resolve_component (c
, sym
))
14755 /* Now add the caf token field, where needed. */
14756 if (flag_coarray
!= GFC_FCOARRAY_NONE
14757 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14759 for (c
= sym
->components
; c
; c
= c
->next
)
14760 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14761 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14763 char name
[GFC_MAX_SYMBOL_LEN
+9];
14764 gfc_component
*token
;
14765 sprintf (name
, "_caf_%s", c
->name
);
14766 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14769 if (!gfc_add_component (sym
, name
, &token
))
14771 token
->ts
.type
= BT_VOID
;
14772 token
->ts
.kind
= gfc_default_integer_kind
;
14773 token
->attr
.access
= ACCESS_PRIVATE
;
14774 token
->attr
.artificial
= 1;
14775 token
->attr
.caf_token
= 1;
14780 check_defined_assignments (sym
);
14782 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14783 sym
->attr
.defined_assign_comp
14784 = super_type
->attr
.defined_assign_comp
;
14786 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14787 all DEFERRED bindings are overridden. */
14788 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14789 && !sym
->attr
.is_class
14790 && !ensure_not_abstract (sym
, super_type
))
14793 /* Check that there is a component for every PDT parameter. */
14794 if (sym
->attr
.pdt_template
)
14796 for (f
= sym
->formal
; f
; f
= f
->next
)
14800 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14803 gfc_error ("Parameterized type %qs does not have a component "
14804 "corresponding to parameter %qs at %L", sym
->name
,
14805 f
->sym
->name
, &sym
->declared_at
);
14811 /* Add derived type to the derived type list. */
14812 add_dt_to_dt_list (sym
);
14818 /* The following procedure does the full resolution of a derived type,
14819 including resolution of all type-bound procedures (if present). In contrast
14820 to 'resolve_fl_derived0' this can only be done after the module has been
14821 parsed completely. */
14824 resolve_fl_derived (gfc_symbol
*sym
)
14826 gfc_symbol
*gen_dt
= NULL
;
14828 if (sym
->attr
.unlimited_polymorphic
)
14831 if (!sym
->attr
.is_class
)
14832 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14833 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14834 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14835 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14836 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14837 "%qs at %L being the same name as derived "
14838 "type at %L", sym
->name
,
14839 gen_dt
->generic
->sym
== sym
14840 ? gen_dt
->generic
->next
->sym
->name
14841 : gen_dt
->generic
->sym
->name
,
14842 gen_dt
->generic
->sym
== sym
14843 ? &gen_dt
->generic
->next
->sym
->declared_at
14844 : &gen_dt
->generic
->sym
->declared_at
,
14845 &sym
->declared_at
))
14848 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14850 gfc_error ("Derived type %qs at %L has not been declared",
14851 sym
->name
, &sym
->declared_at
);
14855 /* Resolve the finalizer procedures. */
14856 if (!gfc_resolve_finalizers (sym
, NULL
))
14859 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14861 /* Fix up incomplete CLASS symbols. */
14862 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14863 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14865 /* Nothing more to do for unlimited polymorphic entities. */
14866 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14868 else if (vptr
->ts
.u
.derived
== NULL
)
14870 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14872 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14873 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14878 if (!resolve_fl_derived0 (sym
))
14881 /* Resolve the type-bound procedures. */
14882 if (!resolve_typebound_procedures (sym
))
14885 /* Generate module vtables subject to their accessibility and their not
14886 being vtables or pdt templates. If this is not done class declarations
14887 in external procedures wind up with their own version and so SELECT TYPE
14888 fails because the vptrs do not have the same address. */
14889 if (gfc_option
.allow_std
& GFC_STD_F2003
14890 && sym
->ns
->proc_name
14891 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14892 && sym
->attr
.access
!= ACCESS_PRIVATE
14893 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14895 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14896 gfc_set_sym_referenced (vtab
);
14904 resolve_fl_namelist (gfc_symbol
*sym
)
14909 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14911 /* Check again, the check in match only works if NAMELIST comes
14913 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14915 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14916 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14920 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14921 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14922 "with assumed shape in namelist %qs at %L",
14923 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14926 if (is_non_constant_shape_array (nl
->sym
)
14927 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14928 "with nonconstant shape in namelist %qs at %L",
14929 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14932 if (nl
->sym
->ts
.type
== BT_CHARACTER
14933 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14934 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14935 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14936 "nonconstant character length in "
14937 "namelist %qs at %L", nl
->sym
->name
,
14938 sym
->name
, &sym
->declared_at
))
14943 /* Reject PRIVATE objects in a PUBLIC namelist. */
14944 if (gfc_check_symbol_access (sym
))
14946 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14948 if (!nl
->sym
->attr
.use_assoc
14949 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14950 && !gfc_check_symbol_access (nl
->sym
))
14952 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14953 "cannot be member of PUBLIC namelist %qs at %L",
14954 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14958 if (nl
->sym
->ts
.type
== BT_DERIVED
14959 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14960 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14962 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14963 "namelist %qs at %L with ALLOCATABLE "
14964 "or POINTER components", nl
->sym
->name
,
14965 sym
->name
, &sym
->declared_at
))
14970 /* Types with private components that came here by USE-association. */
14971 if (nl
->sym
->ts
.type
== BT_DERIVED
14972 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14974 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14975 "components and cannot be member of namelist %qs at %L",
14976 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14980 /* Types with private components that are defined in the same module. */
14981 if (nl
->sym
->ts
.type
== BT_DERIVED
14982 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14983 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14985 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14986 "cannot be a member of PUBLIC namelist %qs at %L",
14987 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14994 /* 14.1.2 A module or internal procedure represent local entities
14995 of the same type as a namelist member and so are not allowed. */
14996 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14998 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
15001 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
15002 if ((nl
->sym
== sym
->ns
->proc_name
)
15004 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
15009 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
15010 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
15012 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
15013 "attribute in %qs at %L", nlsym
->name
,
15014 &sym
->declared_at
);
15024 resolve_fl_parameter (gfc_symbol
*sym
)
15026 /* A parameter array's shape needs to be constant. */
15027 if (sym
->as
!= NULL
15028 && (sym
->as
->type
== AS_DEFERRED
15029 || is_non_constant_shape_array (sym
)))
15031 gfc_error ("Parameter array %qs at %L cannot be automatic "
15032 "or of deferred shape", sym
->name
, &sym
->declared_at
);
15036 /* Constraints on deferred type parameter. */
15037 if (!deferred_requirements (sym
))
15040 /* Make sure a parameter that has been implicitly typed still
15041 matches the implicit type, since PARAMETER statements can precede
15042 IMPLICIT statements. */
15043 if (sym
->attr
.implicit_type
15044 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
15047 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
15048 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
15052 /* Make sure the types of derived parameters are consistent. This
15053 type checking is deferred until resolution because the type may
15054 refer to a derived type from the host. */
15055 if (sym
->ts
.type
== BT_DERIVED
15056 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
15058 gfc_error ("Incompatible derived type in PARAMETER at %L",
15059 &sym
->value
->where
);
15063 /* F03:C509,C514. */
15064 if (sym
->ts
.type
== BT_CLASS
)
15066 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
15067 sym
->name
, &sym
->declared_at
);
15075 /* Called by resolve_symbol to check PDTs. */
15078 resolve_pdt (gfc_symbol
* sym
)
15080 gfc_symbol
*derived
= NULL
;
15081 gfc_actual_arglist
*param
;
15083 bool const_len_exprs
= true;
15084 bool assumed_len_exprs
= false;
15085 symbol_attribute
*attr
;
15087 if (sym
->ts
.type
== BT_DERIVED
)
15089 derived
= sym
->ts
.u
.derived
;
15090 attr
= &(sym
->attr
);
15092 else if (sym
->ts
.type
== BT_CLASS
)
15094 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15095 attr
= &(CLASS_DATA (sym
)->attr
);
15098 gcc_unreachable ();
15100 gcc_assert (derived
->attr
.pdt_type
);
15102 for (param
= sym
->param_list
; param
; param
= param
->next
)
15104 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15106 if (c
->attr
.pdt_kind
)
15109 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15110 && c
->attr
.pdt_len
)
15111 const_len_exprs
= false;
15112 else if (param
->spec_type
== SPEC_ASSUMED
)
15113 assumed_len_exprs
= true;
15115 if (param
->spec_type
== SPEC_DEFERRED
15116 && !attr
->allocatable
&& !attr
->pointer
)
15117 gfc_error ("The object %qs at %L has a deferred LEN "
15118 "parameter %qs and is neither allocatable "
15119 "nor a pointer", sym
->name
, &sym
->declared_at
,
15124 if (!const_len_exprs
15125 && (sym
->ns
->proc_name
->attr
.is_main_program
15126 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15127 || sym
->attr
.save
!= SAVE_NONE
))
15128 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15129 "SAVE attribute or be a variable declared in the "
15130 "main program, a module or a submodule(F08/C513)",
15131 sym
->name
, &sym
->declared_at
);
15133 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15134 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15135 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15136 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15137 sym
->name
, &sym
->declared_at
);
15141 /* Do anything necessary to resolve a symbol. Right now, we just
15142 assume that an otherwise unknown symbol is a variable. This sort
15143 of thing commonly happens for symbols in module. */
15146 resolve_symbol (gfc_symbol
*sym
)
15148 int check_constant
, mp_flag
;
15149 gfc_symtree
*symtree
;
15150 gfc_symtree
*this_symtree
;
15153 symbol_attribute class_attr
;
15154 gfc_array_spec
*as
;
15155 bool saved_specification_expr
;
15161 /* No symbol will ever have union type; only components can be unions.
15162 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15163 (just like derived type declaration symbols have flavor FL_DERIVED). */
15164 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15166 /* Coarrayed polymorphic objects with allocatable or pointer components are
15167 yet unsupported for -fcoarray=lib. */
15168 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15169 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15170 && CLASS_DATA (sym
)->attr
.codimension
15171 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15172 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15174 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15175 "type coarrays at %L are unsupported", &sym
->declared_at
);
15179 if (sym
->attr
.artificial
)
15182 if (sym
->attr
.unlimited_polymorphic
)
15185 if (sym
->attr
.flavor
== FL_UNKNOWN
15186 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15187 && !sym
->attr
.generic
&& !sym
->attr
.external
15188 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15189 && sym
->ts
.type
== BT_UNKNOWN
))
15192 /* If we find that a flavorless symbol is an interface in one of the
15193 parent namespaces, find its symtree in this namespace, free the
15194 symbol and set the symtree to point to the interface symbol. */
15195 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15197 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15198 if (symtree
&& (symtree
->n
.sym
->generic
||
15199 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15200 && sym
->ns
->construct_entities
)))
15202 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15204 if (this_symtree
->n
.sym
== sym
)
15206 symtree
->n
.sym
->refs
++;
15207 gfc_release_symbol (sym
);
15208 this_symtree
->n
.sym
= symtree
->n
.sym
;
15214 /* Otherwise give it a flavor according to such attributes as
15216 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15217 && sym
->attr
.intrinsic
== 0)
15218 sym
->attr
.flavor
= FL_VARIABLE
;
15219 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15221 sym
->attr
.flavor
= FL_PROCEDURE
;
15222 if (sym
->attr
.dimension
)
15223 sym
->attr
.function
= 1;
15227 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15228 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15230 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15231 && !resolve_procedure_interface (sym
))
15234 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15235 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15237 if (sym
->attr
.external
)
15238 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15239 "at %L", &sym
->declared_at
);
15241 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15242 "at %L", &sym
->declared_at
);
15247 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15250 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15251 && !resolve_fl_struct (sym
))
15254 /* Symbols that are module procedures with results (functions) have
15255 the types and array specification copied for type checking in
15256 procedures that call them, as well as for saving to a module
15257 file. These symbols can't stand the scrutiny that their results
15259 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15261 /* Make sure that the intrinsic is consistent with its internal
15262 representation. This needs to be done before assigning a default
15263 type to avoid spurious warnings. */
15264 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15265 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15268 /* Resolve associate names. */
15270 resolve_assoc_var (sym
, true);
15272 /* Assign default type to symbols that need one and don't have one. */
15273 if (sym
->ts
.type
== BT_UNKNOWN
)
15275 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15277 gfc_set_default_type (sym
, 1, NULL
);
15280 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15281 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15282 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15283 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15285 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15287 /* The specific case of an external procedure should emit an error
15288 in the case that there is no implicit type. */
15291 if (!sym
->attr
.mixed_entry_master
)
15292 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15296 /* Result may be in another namespace. */
15297 resolve_symbol (sym
->result
);
15299 if (!sym
->result
->attr
.proc_pointer
)
15301 sym
->ts
= sym
->result
->ts
;
15302 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15303 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15304 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15305 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15306 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15311 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15313 bool saved_specification_expr
= specification_expr
;
15314 specification_expr
= true;
15315 gfc_resolve_array_spec (sym
->result
->as
, false);
15316 specification_expr
= saved_specification_expr
;
15319 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15321 as
= CLASS_DATA (sym
)->as
;
15322 class_attr
= CLASS_DATA (sym
)->attr
;
15323 class_attr
.pointer
= class_attr
.class_pointer
;
15327 class_attr
= sym
->attr
;
15332 if (sym
->attr
.contiguous
15333 && (!class_attr
.dimension
15334 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15335 && !class_attr
.pointer
)))
15337 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15338 "array pointer or an assumed-shape or assumed-rank array",
15339 sym
->name
, &sym
->declared_at
);
15343 /* Assumed size arrays and assumed shape arrays must be dummy
15344 arguments. Array-spec's of implied-shape should have been resolved to
15345 AS_EXPLICIT already. */
15349 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15350 specification expression. */
15351 if (as
->type
== AS_IMPLIED_SHAPE
)
15354 for (i
=0; i
<as
->rank
; i
++)
15356 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15358 gfc_error ("Bad specification for assumed size array at %L",
15359 &as
->lower
[i
]->where
);
15366 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15367 || as
->type
== AS_ASSUMED_SHAPE
)
15368 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15370 if (as
->type
== AS_ASSUMED_SIZE
)
15371 gfc_error ("Assumed size array at %L must be a dummy argument",
15372 &sym
->declared_at
);
15374 gfc_error ("Assumed shape array at %L must be a dummy argument",
15375 &sym
->declared_at
);
15378 /* TS 29113, C535a. */
15379 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15380 && !sym
->attr
.select_type_temporary
15381 && !(cs_base
&& cs_base
->current
15382 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15384 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15385 &sym
->declared_at
);
15388 if (as
->type
== AS_ASSUMED_RANK
15389 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15391 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15392 "CODIMENSION attribute", &sym
->declared_at
);
15397 /* Make sure symbols with known intent or optional are really dummy
15398 variable. Because of ENTRY statement, this has to be deferred
15399 until resolution time. */
15401 if (!sym
->attr
.dummy
15402 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15404 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15408 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15410 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15411 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15415 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15417 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15418 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15420 gfc_error ("Character dummy variable %qs at %L with VALUE "
15421 "attribute must have constant length",
15422 sym
->name
, &sym
->declared_at
);
15426 if (sym
->ts
.is_c_interop
15427 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15429 gfc_error ("C interoperable character dummy variable %qs at %L "
15430 "with VALUE attribute must have length one",
15431 sym
->name
, &sym
->declared_at
);
15436 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15437 && sym
->ts
.u
.derived
->attr
.generic
)
15439 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15440 if (!sym
->ts
.u
.derived
)
15442 gfc_error ("The derived type %qs at %L is of type %qs, "
15443 "which has not been defined", sym
->name
,
15444 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15445 sym
->ts
.type
= BT_UNKNOWN
;
15450 /* Use the same constraints as TYPE(*), except for the type check
15451 and that only scalars and assumed-size arrays are permitted. */
15452 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15454 if (!sym
->attr
.dummy
)
15456 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15457 "a dummy argument", sym
->name
, &sym
->declared_at
);
15461 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15462 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15463 && sym
->ts
.type
!= BT_COMPLEX
)
15465 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15466 "of type TYPE(*) or of an numeric intrinsic type",
15467 sym
->name
, &sym
->declared_at
);
15471 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15472 || sym
->attr
.pointer
|| sym
->attr
.value
)
15474 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15475 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15476 "attribute", sym
->name
, &sym
->declared_at
);
15480 if (sym
->attr
.intent
== INTENT_OUT
)
15482 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15483 "have the INTENT(OUT) attribute",
15484 sym
->name
, &sym
->declared_at
);
15487 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15489 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15490 "either be a scalar or an assumed-size array",
15491 sym
->name
, &sym
->declared_at
);
15495 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15496 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15498 sym
->ts
.type
= BT_ASSUMED
;
15499 sym
->as
= gfc_get_array_spec ();
15500 sym
->as
->type
= AS_ASSUMED_SIZE
;
15502 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15504 else if (sym
->ts
.type
== BT_ASSUMED
)
15506 /* TS 29113, C407a. */
15507 if (!sym
->attr
.dummy
)
15509 gfc_error ("Assumed type of variable %s at %L is only permitted "
15510 "for dummy variables", sym
->name
, &sym
->declared_at
);
15513 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15514 || sym
->attr
.pointer
|| sym
->attr
.value
)
15516 gfc_error ("Assumed-type variable %s at %L may not have the "
15517 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15518 sym
->name
, &sym
->declared_at
);
15521 if (sym
->attr
.intent
== INTENT_OUT
)
15523 gfc_error ("Assumed-type variable %s at %L may not have the "
15524 "INTENT(OUT) attribute",
15525 sym
->name
, &sym
->declared_at
);
15528 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15530 gfc_error ("Assumed-type variable %s at %L shall not be an "
15531 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15536 /* If the symbol is marked as bind(c), that it is declared at module level
15537 scope and verify its type and kind. Do not do the latter for symbols
15538 that are implicitly typed because that is handled in
15539 gfc_set_default_type. Handle dummy arguments and procedure definitions
15540 separately. Also, anything that is use associated is not handled here
15541 but instead is handled in the module it is declared in. Finally, derived
15542 type definitions are allowed to be BIND(C) since that only implies that
15543 they're interoperable, and they are checked fully for interoperability
15544 when a variable is declared of that type. */
15545 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15546 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15547 && sym
->attr
.flavor
!= FL_DERIVED
)
15551 /* First, make sure the variable is declared at the
15552 module-level scope (J3/04-007, Section 15.3). */
15553 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15554 sym
->attr
.in_common
== 0)
15556 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15557 "is neither a COMMON block nor declared at the "
15558 "module level scope", sym
->name
, &(sym
->declared_at
));
15561 else if (sym
->ts
.type
== BT_CHARACTER
15562 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15563 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15564 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15566 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15567 sym
->name
, &sym
->declared_at
);
15570 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15572 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15574 else if (sym
->attr
.implicit_type
== 0)
15576 /* If type() declaration, we need to verify that the components
15577 of the given type are all C interoperable, etc. */
15578 if (sym
->ts
.type
== BT_DERIVED
&&
15579 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15581 /* Make sure the user marked the derived type as BIND(C). If
15582 not, call the verify routine. This could print an error
15583 for the derived type more than once if multiple variables
15584 of that type are declared. */
15585 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15586 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15590 /* Verify the variable itself as C interoperable if it
15591 is BIND(C). It is not possible for this to succeed if
15592 the verify_bind_c_derived_type failed, so don't have to handle
15593 any error returned by verify_bind_c_derived_type. */
15594 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15595 sym
->common_block
);
15600 /* clear the is_bind_c flag to prevent reporting errors more than
15601 once if something failed. */
15602 sym
->attr
.is_bind_c
= 0;
15607 /* If a derived type symbol has reached this point, without its
15608 type being declared, we have an error. Notice that most
15609 conditions that produce undefined derived types have already
15610 been dealt with. However, the likes of:
15611 implicit type(t) (t) ..... call foo (t) will get us here if
15612 the type is not declared in the scope of the implicit
15613 statement. Change the type to BT_UNKNOWN, both because it is so
15614 and to prevent an ICE. */
15615 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15616 && sym
->ts
.u
.derived
->components
== NULL
15617 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15619 gfc_error ("The derived type %qs at %L is of type %qs, "
15620 "which has not been defined", sym
->name
,
15621 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15622 sym
->ts
.type
= BT_UNKNOWN
;
15626 /* Make sure that the derived type has been resolved and that the
15627 derived type is visible in the symbol's namespace, if it is a
15628 module function and is not PRIVATE. */
15629 if (sym
->ts
.type
== BT_DERIVED
15630 && sym
->ts
.u
.derived
->attr
.use_assoc
15631 && sym
->ns
->proc_name
15632 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15633 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15636 /* Unless the derived-type declaration is use associated, Fortran 95
15637 does not allow public entries of private derived types.
15638 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15639 161 in 95-006r3. */
15640 if (sym
->ts
.type
== BT_DERIVED
15641 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15642 && !sym
->ts
.u
.derived
->attr
.use_assoc
15643 && gfc_check_symbol_access (sym
)
15644 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15645 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15646 "derived type %qs",
15647 (sym
->attr
.flavor
== FL_PARAMETER
)
15648 ? "parameter" : "variable",
15649 sym
->name
, &sym
->declared_at
,
15650 sym
->ts
.u
.derived
->name
))
15653 /* F2008, C1302. */
15654 if (sym
->ts
.type
== BT_DERIVED
15655 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15656 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15657 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15658 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15660 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15661 "type LOCK_TYPE must be a coarray", sym
->name
,
15662 &sym
->declared_at
);
15666 /* TS18508, C702/C703. */
15667 if (sym
->ts
.type
== BT_DERIVED
15668 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15669 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15670 || sym
->ts
.u
.derived
->attr
.event_comp
)
15671 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15673 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15674 "type EVENT_TYPE must be a coarray", sym
->name
,
15675 &sym
->declared_at
);
15679 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15680 default initialization is defined (5.1.2.4.4). */
15681 if (sym
->ts
.type
== BT_DERIVED
15683 && sym
->attr
.intent
== INTENT_OUT
15685 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15687 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15689 if (c
->initializer
)
15691 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15692 "ASSUMED SIZE and so cannot have a default initializer",
15693 sym
->name
, &sym
->declared_at
);
15700 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15701 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15703 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15704 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15709 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15710 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15712 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15713 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15718 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15719 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15720 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15721 || class_attr
.codimension
)
15722 && (sym
->attr
.result
|| sym
->result
== sym
))
15724 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15725 "a coarray component", sym
->name
, &sym
->declared_at
);
15730 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15731 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15733 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15734 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15739 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15740 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15741 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15742 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15743 || class_attr
.allocatable
))
15745 gfc_error ("Variable %qs at %L with coarray component shall be a "
15746 "nonpointer, nonallocatable scalar, which is not a coarray",
15747 sym
->name
, &sym
->declared_at
);
15751 /* F2008, C526. The function-result case was handled above. */
15752 if (class_attr
.codimension
15753 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15754 || sym
->attr
.select_type_temporary
15755 || sym
->attr
.associate_var
15756 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15757 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15758 || sym
->ns
->proc_name
->attr
.is_main_program
15759 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15761 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15762 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15766 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15767 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15769 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15770 "deferred shape", sym
->name
, &sym
->declared_at
);
15773 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15774 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15776 gfc_error ("Allocatable coarray variable %qs at %L must have "
15777 "deferred shape", sym
->name
, &sym
->declared_at
);
15782 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15783 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15784 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15785 || (class_attr
.codimension
&& class_attr
.allocatable
))
15786 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15788 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15789 "allocatable coarray or have coarray components",
15790 sym
->name
, &sym
->declared_at
);
15794 if (class_attr
.codimension
&& sym
->attr
.dummy
15795 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15797 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15798 "procedure %qs", sym
->name
, &sym
->declared_at
,
15799 sym
->ns
->proc_name
->name
);
15803 if (sym
->ts
.type
== BT_LOGICAL
15804 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15805 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15806 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15809 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15810 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15812 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15813 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15814 "%L with non-C_Bool kind in BIND(C) procedure "
15815 "%qs", sym
->name
, &sym
->declared_at
,
15816 sym
->ns
->proc_name
->name
))
15818 else if (!gfc_logical_kinds
[i
].c_bool
15819 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15820 "%qs at %L with non-C_Bool kind in "
15821 "BIND(C) procedure %qs", sym
->name
,
15823 sym
->attr
.function
? sym
->name
15824 : sym
->ns
->proc_name
->name
))
15828 switch (sym
->attr
.flavor
)
15831 if (!resolve_fl_variable (sym
, mp_flag
))
15836 if (sym
->formal
&& !sym
->formal_ns
)
15838 /* Check that none of the arguments are a namelist. */
15839 gfc_formal_arglist
*formal
= sym
->formal
;
15841 for (; formal
; formal
= formal
->next
)
15842 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15844 gfc_error ("Namelist %qs cannot be an argument to "
15845 "subroutine or function at %L",
15846 formal
->sym
->name
, &sym
->declared_at
);
15851 if (!resolve_fl_procedure (sym
, mp_flag
))
15856 if (!resolve_fl_namelist (sym
))
15861 if (!resolve_fl_parameter (sym
))
15869 /* Resolve array specifier. Check as well some constraints
15870 on COMMON blocks. */
15872 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15874 /* Set the formal_arg_flag so that check_conflict will not throw
15875 an error for host associated variables in the specification
15876 expression for an array_valued function. */
15877 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15878 formal_arg_flag
= true;
15880 saved_specification_expr
= specification_expr
;
15881 specification_expr
= true;
15882 gfc_resolve_array_spec (sym
->as
, check_constant
);
15883 specification_expr
= saved_specification_expr
;
15885 formal_arg_flag
= false;
15887 /* Resolve formal namespaces. */
15888 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15889 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15890 gfc_resolve (sym
->formal_ns
);
15892 /* Make sure the formal namespace is present. */
15893 if (sym
->formal
&& !sym
->formal_ns
)
15895 gfc_formal_arglist
*formal
= sym
->formal
;
15896 while (formal
&& !formal
->sym
)
15897 formal
= formal
->next
;
15901 sym
->formal_ns
= formal
->sym
->ns
;
15902 if (sym
->ns
!= formal
->sym
->ns
)
15903 sym
->formal_ns
->refs
++;
15907 /* Check threadprivate restrictions. */
15908 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15909 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15910 && (!sym
->attr
.in_common
15911 && sym
->module
== NULL
15912 && (sym
->ns
->proc_name
== NULL
15913 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15914 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15916 /* Check omp declare target restrictions. */
15917 if (sym
->attr
.omp_declare_target
15918 && sym
->attr
.flavor
== FL_VARIABLE
15920 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15921 && (!sym
->attr
.in_common
15922 && sym
->module
== NULL
15923 && (sym
->ns
->proc_name
== NULL
15924 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15925 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15926 sym
->name
, &sym
->declared_at
);
15928 /* If we have come this far we can apply default-initializers, as
15929 described in 14.7.5, to those variables that have not already
15930 been assigned one. */
15931 if (sym
->ts
.type
== BT_DERIVED
15933 && !sym
->attr
.allocatable
15934 && !sym
->attr
.alloc_comp
)
15936 symbol_attribute
*a
= &sym
->attr
;
15938 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15939 && !a
->in_common
&& !a
->use_assoc
15941 && !((a
->function
|| a
->result
)
15943 || sym
->ts
.u
.derived
->attr
.alloc_comp
15944 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15945 && !(a
->function
&& sym
!= sym
->result
))
15946 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15947 apply_default_init (sym
);
15948 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15949 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15950 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15951 /* Mark the result symbol to be referenced, when it has allocatable
15953 sym
->result
->attr
.referenced
= 1;
15956 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15957 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15958 && !CLASS_DATA (sym
)->attr
.class_pointer
15959 && !CLASS_DATA (sym
)->attr
.allocatable
)
15960 apply_default_init (sym
);
15962 /* If this symbol has a type-spec, check it. */
15963 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15964 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15965 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15968 if (sym
->param_list
)
15973 /************* Resolve DATA statements *************/
15977 gfc_data_value
*vnode
;
15983 /* Advance the values structure to point to the next value in the data list. */
15986 next_data_value (void)
15988 while (mpz_cmp_ui (values
.left
, 0) == 0)
15991 if (values
.vnode
->next
== NULL
)
15994 values
.vnode
= values
.vnode
->next
;
15995 mpz_set (values
.left
, values
.vnode
->repeat
);
16003 check_data_variable (gfc_data_variable
*var
, locus
*where
)
16009 ar_type mark
= AR_UNKNOWN
;
16011 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
16017 if (!gfc_resolve_expr (var
->expr
))
16021 mpz_init_set_si (offset
, 0);
16024 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
16025 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
16026 e
= e
->value
.function
.actual
->expr
;
16028 if (e
->expr_type
!= EXPR_VARIABLE
)
16030 gfc_error ("Expecting definable entity near %L", where
);
16034 sym
= e
->symtree
->n
.sym
;
16036 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
16038 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
16039 sym
->name
, &sym
->declared_at
);
16043 if (e
->ref
== NULL
&& sym
->as
)
16045 gfc_error ("DATA array %qs at %L must be specified in a previous"
16046 " declaration", sym
->name
, where
);
16050 if (gfc_is_coindexed (e
))
16052 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
16057 has_pointer
= sym
->attr
.pointer
;
16059 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16061 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
16066 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
16068 gfc_error ("DATA element %qs at %L is a pointer and so must "
16069 "be a full array", sym
->name
, where
);
16073 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16075 gfc_error ("DATA object near %L has the pointer attribute "
16076 "and the corresponding DATA value is not a valid "
16077 "initial-data-target", where
);
16083 if (e
->rank
== 0 || has_pointer
)
16085 mpz_init_set_ui (size
, 1);
16092 /* Find the array section reference. */
16093 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16095 if (ref
->type
!= REF_ARRAY
)
16097 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16103 /* Set marks according to the reference pattern. */
16104 switch (ref
->u
.ar
.type
)
16112 /* Get the start position of array section. */
16113 gfc_get_section_index (ar
, section_index
, &offset
);
16118 gcc_unreachable ();
16121 if (!gfc_array_size (e
, &size
))
16123 gfc_error ("Nonconstant array section at %L in DATA statement",
16125 mpz_clear (offset
);
16132 while (mpz_cmp_ui (size
, 0) > 0)
16134 if (!next_data_value ())
16136 gfc_error ("DATA statement at %L has more variables than values",
16142 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16146 /* If we have more than one element left in the repeat count,
16147 and we have more than one element left in the target variable,
16148 then create a range assignment. */
16149 /* FIXME: Only done for full arrays for now, since array sections
16151 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16152 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16156 if (mpz_cmp (size
, values
.left
) >= 0)
16158 mpz_init_set (range
, values
.left
);
16159 mpz_sub (size
, size
, values
.left
);
16160 mpz_set_ui (values
.left
, 0);
16164 mpz_init_set (range
, size
);
16165 mpz_sub (values
.left
, values
.left
, size
);
16166 mpz_set_ui (size
, 0);
16169 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16172 mpz_add (offset
, offset
, range
);
16179 /* Assign initial value to symbol. */
16182 mpz_sub_ui (values
.left
, values
.left
, 1);
16183 mpz_sub_ui (size
, size
, 1);
16185 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16190 if (mark
== AR_FULL
)
16191 mpz_add_ui (offset
, offset
, 1);
16193 /* Modify the array section indexes and recalculate the offset
16194 for next element. */
16195 else if (mark
== AR_SECTION
)
16196 gfc_advance_section (section_index
, ar
, &offset
);
16200 if (mark
== AR_SECTION
)
16202 for (i
= 0; i
< ar
->dimen
; i
++)
16203 mpz_clear (section_index
[i
]);
16207 mpz_clear (offset
);
16213 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16215 /* Iterate over a list of elements in a DATA statement. */
16218 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16221 iterator_stack frame
;
16222 gfc_expr
*e
, *start
, *end
, *step
;
16223 bool retval
= true;
16225 mpz_init (frame
.value
);
16228 start
= gfc_copy_expr (var
->iter
.start
);
16229 end
= gfc_copy_expr (var
->iter
.end
);
16230 step
= gfc_copy_expr (var
->iter
.step
);
16232 if (!gfc_simplify_expr (start
, 1)
16233 || start
->expr_type
!= EXPR_CONSTANT
)
16235 gfc_error ("start of implied-do loop at %L could not be "
16236 "simplified to a constant value", &start
->where
);
16240 if (!gfc_simplify_expr (end
, 1)
16241 || end
->expr_type
!= EXPR_CONSTANT
)
16243 gfc_error ("end of implied-do loop at %L could not be "
16244 "simplified to a constant value", &start
->where
);
16248 if (!gfc_simplify_expr (step
, 1)
16249 || step
->expr_type
!= EXPR_CONSTANT
)
16251 gfc_error ("step of implied-do loop at %L could not be "
16252 "simplified to a constant value", &start
->where
);
16257 mpz_set (trip
, end
->value
.integer
);
16258 mpz_sub (trip
, trip
, start
->value
.integer
);
16259 mpz_add (trip
, trip
, step
->value
.integer
);
16261 mpz_div (trip
, trip
, step
->value
.integer
);
16263 mpz_set (frame
.value
, start
->value
.integer
);
16265 frame
.prev
= iter_stack
;
16266 frame
.variable
= var
->iter
.var
->symtree
;
16267 iter_stack
= &frame
;
16269 while (mpz_cmp_ui (trip
, 0) > 0)
16271 if (!traverse_data_var (var
->list
, where
))
16277 e
= gfc_copy_expr (var
->expr
);
16278 if (!gfc_simplify_expr (e
, 1))
16285 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16287 mpz_sub_ui (trip
, trip
, 1);
16291 mpz_clear (frame
.value
);
16294 gfc_free_expr (start
);
16295 gfc_free_expr (end
);
16296 gfc_free_expr (step
);
16298 iter_stack
= frame
.prev
;
16303 /* Type resolve variables in the variable list of a DATA statement. */
16306 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16310 for (; var
; var
= var
->next
)
16312 if (var
->expr
== NULL
)
16313 t
= traverse_data_list (var
, where
);
16315 t
= check_data_variable (var
, where
);
16325 /* Resolve the expressions and iterators associated with a data statement.
16326 This is separate from the assignment checking because data lists should
16327 only be resolved once. */
16330 resolve_data_variables (gfc_data_variable
*d
)
16332 for (; d
; d
= d
->next
)
16334 if (d
->list
== NULL
)
16336 if (!gfc_resolve_expr (d
->expr
))
16341 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16344 if (!resolve_data_variables (d
->list
))
16353 /* Resolve a single DATA statement. We implement this by storing a pointer to
16354 the value list into static variables, and then recursively traversing the
16355 variables list, expanding iterators and such. */
16358 resolve_data (gfc_data
*d
)
16361 if (!resolve_data_variables (d
->var
))
16364 values
.vnode
= d
->value
;
16365 if (d
->value
== NULL
)
16366 mpz_set_ui (values
.left
, 0);
16368 mpz_set (values
.left
, d
->value
->repeat
);
16370 if (!traverse_data_var (d
->var
, &d
->where
))
16373 /* At this point, we better not have any values left. */
16375 if (next_data_value ())
16376 gfc_error ("DATA statement at %L has more values than variables",
16381 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16382 accessed by host or use association, is a dummy argument to a pure function,
16383 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16384 is storage associated with any such variable, shall not be used in the
16385 following contexts: (clients of this function). */
16387 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16388 procedure. Returns zero if assignment is OK, nonzero if there is a
16391 gfc_impure_variable (gfc_symbol
*sym
)
16396 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16399 /* Check if the symbol's ns is inside the pure procedure. */
16400 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16404 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16408 proc
= sym
->ns
->proc_name
;
16409 if (sym
->attr
.dummy
16410 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16411 || proc
->attr
.function
))
16414 /* TODO: Sort out what can be storage associated, if anything, and include
16415 it here. In principle equivalences should be scanned but it does not
16416 seem to be possible to storage associate an impure variable this way. */
16421 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16422 current namespace is inside a pure procedure. */
16425 gfc_pure (gfc_symbol
*sym
)
16427 symbol_attribute attr
;
16432 /* Check if the current namespace or one of its parents
16433 belongs to a pure procedure. */
16434 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16436 sym
= ns
->proc_name
;
16440 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16448 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16452 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16453 checks if the current namespace is implicitly pure. Note that this
16454 function returns false for a PURE procedure. */
16457 gfc_implicit_pure (gfc_symbol
*sym
)
16463 /* Check if the current procedure is implicit_pure. Walk up
16464 the procedure list until we find a procedure. */
16465 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16467 sym
= ns
->proc_name
;
16471 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16476 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16477 && !sym
->attr
.pure
;
16482 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16488 /* Check if the current procedure is implicit_pure. Walk up
16489 the procedure list until we find a procedure. */
16490 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16492 sym
= ns
->proc_name
;
16496 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16501 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16502 sym
->attr
.implicit_pure
= 0;
16504 sym
->attr
.pure
= 0;
16508 /* Test whether the current procedure is elemental or not. */
16511 gfc_elemental (gfc_symbol
*sym
)
16513 symbol_attribute attr
;
16516 sym
= gfc_current_ns
->proc_name
;
16521 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16525 /* Warn about unused labels. */
16528 warn_unused_fortran_label (gfc_st_label
*label
)
16533 warn_unused_fortran_label (label
->left
);
16535 if (label
->defined
== ST_LABEL_UNKNOWN
)
16538 switch (label
->referenced
)
16540 case ST_LABEL_UNKNOWN
:
16541 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16542 label
->value
, &label
->where
);
16545 case ST_LABEL_BAD_TARGET
:
16546 gfc_warning (OPT_Wunused_label
,
16547 "Label %d at %L defined but cannot be used",
16548 label
->value
, &label
->where
);
16555 warn_unused_fortran_label (label
->right
);
16559 /* Returns the sequence type of a symbol or sequence. */
16562 sequence_type (gfc_typespec ts
)
16571 if (ts
.u
.derived
->components
== NULL
)
16572 return SEQ_NONDEFAULT
;
16574 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16575 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16576 if (sequence_type (c
->ts
) != result
)
16582 if (ts
.kind
!= gfc_default_character_kind
)
16583 return SEQ_NONDEFAULT
;
16585 return SEQ_CHARACTER
;
16588 if (ts
.kind
!= gfc_default_integer_kind
)
16589 return SEQ_NONDEFAULT
;
16591 return SEQ_NUMERIC
;
16594 if (!(ts
.kind
== gfc_default_real_kind
16595 || ts
.kind
== gfc_default_double_kind
))
16596 return SEQ_NONDEFAULT
;
16598 return SEQ_NUMERIC
;
16601 if (ts
.kind
!= gfc_default_complex_kind
)
16602 return SEQ_NONDEFAULT
;
16604 return SEQ_NUMERIC
;
16607 if (ts
.kind
!= gfc_default_logical_kind
)
16608 return SEQ_NONDEFAULT
;
16610 return SEQ_NUMERIC
;
16613 return SEQ_NONDEFAULT
;
16618 /* Resolve derived type EQUIVALENCE object. */
16621 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16623 gfc_component
*c
= derived
->components
;
16628 /* Shall not be an object of nonsequence derived type. */
16629 if (!derived
->attr
.sequence
)
16631 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16632 "attribute to be an EQUIVALENCE object", sym
->name
,
16637 /* Shall not have allocatable components. */
16638 if (derived
->attr
.alloc_comp
)
16640 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16641 "components to be an EQUIVALENCE object",sym
->name
,
16646 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16648 gfc_error ("Derived type variable %qs at %L with default "
16649 "initialization cannot be in EQUIVALENCE with a variable "
16650 "in COMMON", sym
->name
, &e
->where
);
16654 for (; c
; c
= c
->next
)
16656 if (gfc_bt_struct (c
->ts
.type
)
16657 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16660 /* Shall not be an object of sequence derived type containing a pointer
16661 in the structure. */
16662 if (c
->attr
.pointer
)
16664 gfc_error ("Derived type variable %qs at %L with pointer "
16665 "component(s) cannot be an EQUIVALENCE object",
16666 sym
->name
, &e
->where
);
16674 /* Resolve equivalence object.
16675 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16676 an allocatable array, an object of nonsequence derived type, an object of
16677 sequence derived type containing a pointer at any level of component
16678 selection, an automatic object, a function name, an entry name, a result
16679 name, a named constant, a structure component, or a subobject of any of
16680 the preceding objects. A substring shall not have length zero. A
16681 derived type shall not have components with default initialization nor
16682 shall two objects of an equivalence group be initialized.
16683 Either all or none of the objects shall have an protected attribute.
16684 The simple constraints are done in symbol.c(check_conflict) and the rest
16685 are implemented here. */
16688 resolve_equivalence (gfc_equiv
*eq
)
16691 gfc_symbol
*first_sym
;
16694 locus
*last_where
= NULL
;
16695 seq_type eq_type
, last_eq_type
;
16696 gfc_typespec
*last_ts
;
16697 int object
, cnt_protected
;
16700 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16702 first_sym
= eq
->expr
->symtree
->n
.sym
;
16706 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16710 e
->ts
= e
->symtree
->n
.sym
->ts
;
16711 /* match_varspec might not know yet if it is seeing
16712 array reference or substring reference, as it doesn't
16714 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16716 gfc_ref
*ref
= e
->ref
;
16717 sym
= e
->symtree
->n
.sym
;
16719 if (sym
->attr
.dimension
)
16721 ref
->u
.ar
.as
= sym
->as
;
16725 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16726 if (e
->ts
.type
== BT_CHARACTER
16728 && ref
->type
== REF_ARRAY
16729 && ref
->u
.ar
.dimen
== 1
16730 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16731 && ref
->u
.ar
.stride
[0] == NULL
)
16733 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16734 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16737 /* Optimize away the (:) reference. */
16738 if (start
== NULL
&& end
== NULL
)
16741 e
->ref
= ref
->next
;
16743 e
->ref
->next
= ref
->next
;
16748 ref
->type
= REF_SUBSTRING
;
16750 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16752 ref
->u
.ss
.start
= start
;
16753 if (end
== NULL
&& e
->ts
.u
.cl
)
16754 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16755 ref
->u
.ss
.end
= end
;
16756 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16763 /* Any further ref is an error. */
16766 gcc_assert (ref
->type
== REF_ARRAY
);
16767 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16773 if (!gfc_resolve_expr (e
))
16776 sym
= e
->symtree
->n
.sym
;
16778 if (sym
->attr
.is_protected
)
16780 if (cnt_protected
> 0 && cnt_protected
!= object
)
16782 gfc_error ("Either all or none of the objects in the "
16783 "EQUIVALENCE set at %L shall have the "
16784 "PROTECTED attribute",
16789 /* Shall not equivalence common block variables in a PURE procedure. */
16790 if (sym
->ns
->proc_name
16791 && sym
->ns
->proc_name
->attr
.pure
16792 && sym
->attr
.in_common
)
16794 /* Need to check for symbols that may have entered the pure
16795 procedure via a USE statement. */
16796 bool saw_sym
= false;
16797 if (sym
->ns
->use_stmts
)
16800 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16801 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16807 gfc_error ("COMMON block member %qs at %L cannot be an "
16808 "EQUIVALENCE object in the pure procedure %qs",
16809 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16813 /* Shall not be a named constant. */
16814 if (e
->expr_type
== EXPR_CONSTANT
)
16816 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16817 "object", sym
->name
, &e
->where
);
16821 if (e
->ts
.type
== BT_DERIVED
16822 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16825 /* Check that the types correspond correctly:
16827 A numeric sequence structure may be equivalenced to another sequence
16828 structure, an object of default integer type, default real type, double
16829 precision real type, default logical type such that components of the
16830 structure ultimately only become associated to objects of the same
16831 kind. A character sequence structure may be equivalenced to an object
16832 of default character kind or another character sequence structure.
16833 Other objects may be equivalenced only to objects of the same type and
16834 kind parameters. */
16836 /* Identical types are unconditionally OK. */
16837 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16838 goto identical_types
;
16840 last_eq_type
= sequence_type (*last_ts
);
16841 eq_type
= sequence_type (sym
->ts
);
16843 /* Since the pair of objects is not of the same type, mixed or
16844 non-default sequences can be rejected. */
16846 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16847 "statement at %L with different type objects";
16849 && last_eq_type
== SEQ_MIXED
16850 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16851 || (eq_type
== SEQ_MIXED
16852 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16855 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16856 "statement at %L with objects of different type";
16858 && last_eq_type
== SEQ_NONDEFAULT
16859 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16860 || (eq_type
== SEQ_NONDEFAULT
16861 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16864 msg
="Non-CHARACTER object %qs in default CHARACTER "
16865 "EQUIVALENCE statement at %L";
16866 if (last_eq_type
== SEQ_CHARACTER
16867 && eq_type
!= SEQ_CHARACTER
16868 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16871 msg
="Non-NUMERIC object %qs in default NUMERIC "
16872 "EQUIVALENCE statement at %L";
16873 if (last_eq_type
== SEQ_NUMERIC
16874 && eq_type
!= SEQ_NUMERIC
16875 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16881 last_where
= &e
->where
;
16886 /* Shall not be an automatic array. */
16887 if (e
->ref
->type
== REF_ARRAY
&& is_non_constant_shape_array (sym
))
16889 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16890 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16897 /* Shall not be a structure component. */
16898 if (r
->type
== REF_COMPONENT
)
16900 gfc_error ("Structure component %qs at %L cannot be an "
16901 "EQUIVALENCE object",
16902 r
->u
.c
.component
->name
, &e
->where
);
16906 /* A substring shall not have length zero. */
16907 if (r
->type
== REF_SUBSTRING
)
16909 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16911 gfc_error ("Substring at %L has length zero",
16912 &r
->u
.ss
.start
->where
);
16922 /* Function called by resolve_fntype to flag other symbols used in the
16923 length type parameter specification of function results. */
16926 flag_fn_result_spec (gfc_expr
*expr
,
16928 int *f ATTRIBUTE_UNUSED
)
16933 if (expr
->expr_type
== EXPR_VARIABLE
)
16935 s
= expr
->symtree
->n
.sym
;
16936 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16942 gfc_error ("Self reference in character length expression "
16943 "for %qs at %L", sym
->name
, &expr
->where
);
16947 if (!s
->fn_result_spec
16948 && s
->attr
.flavor
== FL_PARAMETER
)
16950 /* Function contained in a module.... */
16951 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16954 s
->fn_result_spec
= 1;
16955 /* Make sure that this symbol is translated as a module
16957 st
= gfc_get_unique_symtree (ns
);
16961 /* ... which is use associated and called. */
16962 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16964 /* External function matched with an interface. */
16967 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16968 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16969 && s
->ns
->proc_name
->attr
.function
))
16970 s
->fn_result_spec
= 1;
16977 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16980 resolve_fntype (gfc_namespace
*ns
)
16982 gfc_entry_list
*el
;
16985 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16988 /* If there are any entries, ns->proc_name is the entry master
16989 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16991 sym
= ns
->entries
->sym
;
16993 sym
= ns
->proc_name
;
16994 if (sym
->result
== sym
16995 && sym
->ts
.type
== BT_UNKNOWN
16996 && !gfc_set_default_type (sym
, 0, NULL
)
16997 && !sym
->attr
.untyped
)
16999 gfc_error ("Function %qs at %L has no IMPLICIT type",
17000 sym
->name
, &sym
->declared_at
);
17001 sym
->attr
.untyped
= 1;
17004 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
17005 && !sym
->attr
.contained
17006 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
17007 && gfc_check_symbol_access (sym
))
17009 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
17010 "%L of PRIVATE type %qs", sym
->name
,
17011 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
17015 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
17017 if (el
->sym
->result
== el
->sym
17018 && el
->sym
->ts
.type
== BT_UNKNOWN
17019 && !gfc_set_default_type (el
->sym
, 0, NULL
)
17020 && !el
->sym
->attr
.untyped
)
17022 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
17023 el
->sym
->name
, &el
->sym
->declared_at
);
17024 el
->sym
->attr
.untyped
= 1;
17028 if (sym
->ts
.type
== BT_CHARACTER
)
17029 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
17033 /* 12.3.2.1.1 Defined operators. */
17036 check_uop_procedure (gfc_symbol
*sym
, locus where
)
17038 gfc_formal_arglist
*formal
;
17040 if (!sym
->attr
.function
)
17042 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
17043 sym
->name
, &where
);
17047 if (sym
->ts
.type
== BT_CHARACTER
17048 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
17049 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
17050 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
17052 gfc_error ("User operator procedure %qs at %L cannot be assumed "
17053 "character length", sym
->name
, &where
);
17057 formal
= gfc_sym_get_dummy_args (sym
);
17058 if (!formal
|| !formal
->sym
)
17060 gfc_error ("User operator procedure %qs at %L must have at least "
17061 "one argument", sym
->name
, &where
);
17065 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17067 gfc_error ("First argument of operator interface at %L must be "
17068 "INTENT(IN)", &where
);
17072 if (formal
->sym
->attr
.optional
)
17074 gfc_error ("First argument of operator interface at %L cannot be "
17075 "optional", &where
);
17079 formal
= formal
->next
;
17080 if (!formal
|| !formal
->sym
)
17083 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17085 gfc_error ("Second argument of operator interface at %L must be "
17086 "INTENT(IN)", &where
);
17090 if (formal
->sym
->attr
.optional
)
17092 gfc_error ("Second argument of operator interface at %L cannot be "
17093 "optional", &where
);
17099 gfc_error ("Operator interface at %L must have, at most, two "
17100 "arguments", &where
);
17108 gfc_resolve_uops (gfc_symtree
*symtree
)
17110 gfc_interface
*itr
;
17112 if (symtree
== NULL
)
17115 gfc_resolve_uops (symtree
->left
);
17116 gfc_resolve_uops (symtree
->right
);
17118 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17119 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17123 /* Examine all of the expressions associated with a program unit,
17124 assign types to all intermediate expressions, make sure that all
17125 assignments are to compatible types and figure out which names
17126 refer to which functions or subroutines. It doesn't check code
17127 block, which is handled by gfc_resolve_code. */
17130 resolve_types (gfc_namespace
*ns
)
17136 gfc_namespace
* old_ns
= gfc_current_ns
;
17137 bool recursive
= ns
->proc_name
&& ns
->proc_name
->attr
.recursive
;
17139 if (ns
->types_resolved
)
17142 /* Check that all IMPLICIT types are ok. */
17143 if (!ns
->seen_implicit_none
)
17146 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17147 if (ns
->set_flag
[letter
]
17148 && !resolve_typespec_used (&ns
->default_type
[letter
],
17149 &ns
->implicit_loc
[letter
], NULL
))
17153 gfc_current_ns
= ns
;
17155 resolve_entries (ns
);
17157 resolve_common_vars (&ns
->blank_common
, false);
17158 resolve_common_blocks (ns
->common_root
);
17160 resolve_contained_functions (ns
);
17162 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17163 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17164 gfc_resolve_formal_arglist (ns
->proc_name
);
17166 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17168 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17169 resolve_charlen (cl
);
17171 gfc_traverse_ns (ns
, resolve_symbol
);
17173 resolve_fntype (ns
);
17175 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17177 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17178 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17179 "also be PURE", n
->proc_name
->name
,
17180 &n
->proc_name
->declared_at
);
17186 gfc_do_concurrent_flag
= 0;
17187 gfc_check_interfaces (ns
);
17189 gfc_traverse_ns (ns
, resolve_values
);
17191 if (ns
->save_all
|| (!flag_automatic
&& !recursive
))
17195 for (d
= ns
->data
; d
; d
= d
->next
)
17199 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17201 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17203 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17204 resolve_equivalence (eq
);
17206 /* Warn about unused labels. */
17207 if (warn_unused_label
)
17208 warn_unused_fortran_label (ns
->st_labels
);
17210 gfc_resolve_uops (ns
->uop_root
);
17212 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17214 gfc_resolve_omp_declare_simd (ns
);
17216 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17218 ns
->types_resolved
= 1;
17220 gfc_current_ns
= old_ns
;
17224 /* Call gfc_resolve_code recursively. */
17227 resolve_codes (gfc_namespace
*ns
)
17230 bitmap_obstack old_obstack
;
17232 if (ns
->resolved
== 1)
17235 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17238 gfc_current_ns
= ns
;
17240 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17241 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17244 /* Set to an out of range value. */
17245 current_entry_id
= -1;
17247 old_obstack
= labels_obstack
;
17248 bitmap_obstack_initialize (&labels_obstack
);
17250 gfc_resolve_oacc_declare (ns
);
17251 gfc_resolve_oacc_routines (ns
);
17252 gfc_resolve_omp_local_vars (ns
);
17253 gfc_resolve_code (ns
->code
, ns
);
17255 bitmap_obstack_release (&labels_obstack
);
17256 labels_obstack
= old_obstack
;
17260 /* This function is called after a complete program unit has been compiled.
17261 Its purpose is to examine all of the expressions associated with a program
17262 unit, assign types to all intermediate expressions, make sure that all
17263 assignments are to compatible types and figure out which names refer to
17264 which functions or subroutines. */
17267 gfc_resolve (gfc_namespace
*ns
)
17269 gfc_namespace
*old_ns
;
17270 code_stack
*old_cs_base
;
17271 struct gfc_omp_saved_state old_omp_state
;
17277 old_ns
= gfc_current_ns
;
17278 old_cs_base
= cs_base
;
17280 /* As gfc_resolve can be called during resolution of an OpenMP construct
17281 body, we should clear any state associated to it, so that say NS's
17282 DO loops are not interpreted as OpenMP loops. */
17283 if (!ns
->construct_entities
)
17284 gfc_omp_save_and_clear_state (&old_omp_state
);
17286 resolve_types (ns
);
17287 component_assignment_level
= 0;
17288 resolve_codes (ns
);
17290 gfc_current_ns
= old_ns
;
17291 cs_base
= old_cs_base
;
17294 gfc_run_passes (ns
);
17296 if (!ns
->construct_entities
)
17297 gfc_omp_restore_state (&old_omp_state
);