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 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
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 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2605 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2606 gfc_errors_to_warnings (true);
2608 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2609 reason
, sizeof(reason
), NULL
, NULL
))
2611 gfc_error_opt (0, "Interface mismatch in global procedure %qs at %L:"
2612 " %s", sym
->name
, &sym
->declared_at
, reason
);
2618 gfc_errors_to_warnings (false);
2620 if (gsym
->type
== GSYM_UNKNOWN
)
2623 gsym
->where
= *where
;
2630 /************* Function resolution *************/
2632 /* Resolve a function call known to be generic.
2633 Section 14.1.2.4.1. */
2636 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2640 if (sym
->attr
.generic
)
2642 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2645 expr
->value
.function
.name
= s
->name
;
2646 expr
->value
.function
.esym
= s
;
2648 if (s
->ts
.type
!= BT_UNKNOWN
)
2650 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2651 expr
->ts
= s
->result
->ts
;
2654 expr
->rank
= s
->as
->rank
;
2655 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2656 expr
->rank
= s
->result
->as
->rank
;
2658 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2663 /* TODO: Need to search for elemental references in generic
2667 if (sym
->attr
.intrinsic
)
2668 return gfc_intrinsic_func_interface (expr
, 0);
2675 resolve_generic_f (gfc_expr
*expr
)
2679 gfc_interface
*intr
= NULL
;
2681 sym
= expr
->symtree
->n
.sym
;
2685 m
= resolve_generic_f0 (expr
, sym
);
2688 else if (m
== MATCH_ERROR
)
2693 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2694 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2697 if (sym
->ns
->parent
== NULL
)
2699 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2703 if (!generic_sym (sym
))
2707 /* Last ditch attempt. See if the reference is to an intrinsic
2708 that possesses a matching interface. 14.1.2.4 */
2709 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2711 if (gfc_init_expr_flag
)
2712 gfc_error ("Function %qs in initialization expression at %L "
2713 "must be an intrinsic function",
2714 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2716 gfc_error ("There is no specific function for the generic %qs "
2717 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2723 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2726 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2728 return resolve_structure_cons (expr
, 0);
2731 m
= gfc_intrinsic_func_interface (expr
, 0);
2736 gfc_error ("Generic function %qs at %L is not consistent with a "
2737 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2744 /* Resolve a function call known to be specific. */
2747 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2751 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2753 if (sym
->attr
.dummy
)
2755 sym
->attr
.proc
= PROC_DUMMY
;
2759 sym
->attr
.proc
= PROC_EXTERNAL
;
2763 if (sym
->attr
.proc
== PROC_MODULE
2764 || sym
->attr
.proc
== PROC_ST_FUNCTION
2765 || sym
->attr
.proc
== PROC_INTERNAL
)
2768 if (sym
->attr
.intrinsic
)
2770 m
= gfc_intrinsic_func_interface (expr
, 1);
2774 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2775 "with an intrinsic", sym
->name
, &expr
->where
);
2783 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2786 expr
->ts
= sym
->result
->ts
;
2789 expr
->value
.function
.name
= sym
->name
;
2790 expr
->value
.function
.esym
= sym
;
2791 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2793 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2795 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2796 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2797 else if (sym
->as
!= NULL
)
2798 expr
->rank
= sym
->as
->rank
;
2805 resolve_specific_f (gfc_expr
*expr
)
2810 sym
= expr
->symtree
->n
.sym
;
2814 m
= resolve_specific_f0 (sym
, expr
);
2817 if (m
== MATCH_ERROR
)
2820 if (sym
->ns
->parent
== NULL
)
2823 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2829 gfc_error ("Unable to resolve the specific function %qs at %L",
2830 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2835 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2836 candidates in CANDIDATES_LEN. */
2839 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2841 size_t &candidates_len
)
2847 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2848 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2849 vec_push (candidates
, candidates_len
, sym
->name
);
2853 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2857 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2861 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2864 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2866 char **candidates
= NULL
;
2867 size_t candidates_len
= 0;
2868 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2869 return gfc_closest_fuzzy_match (fn
, candidates
);
2873 /* Resolve a procedure call not known to be generic nor specific. */
2876 resolve_unknown_f (gfc_expr
*expr
)
2881 sym
= expr
->symtree
->n
.sym
;
2883 if (sym
->attr
.dummy
)
2885 sym
->attr
.proc
= PROC_DUMMY
;
2886 expr
->value
.function
.name
= sym
->name
;
2890 /* See if we have an intrinsic function reference. */
2892 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2894 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2899 /* The reference is to an external name. */
2901 sym
->attr
.proc
= PROC_EXTERNAL
;
2902 expr
->value
.function
.name
= sym
->name
;
2903 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2905 if (sym
->as
!= NULL
)
2906 expr
->rank
= sym
->as
->rank
;
2908 /* Type of the expression is either the type of the symbol or the
2909 default type of the symbol. */
2912 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2914 if (sym
->ts
.type
!= BT_UNKNOWN
)
2918 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2920 if (ts
->type
== BT_UNKNOWN
)
2923 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2925 gfc_error ("Function %qs at %L has no IMPLICIT type"
2926 "; did you mean %qs?",
2927 sym
->name
, &expr
->where
, guessed
);
2929 gfc_error ("Function %qs at %L has no IMPLICIT type",
2930 sym
->name
, &expr
->where
);
2941 /* Return true, if the symbol is an external procedure. */
2943 is_external_proc (gfc_symbol
*sym
)
2945 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2946 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2947 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2948 && !sym
->attr
.proc_pointer
2949 && !sym
->attr
.use_assoc
2957 /* Figure out if a function reference is pure or not. Also set the name
2958 of the function for a potential error message. Return nonzero if the
2959 function is PURE, zero if not. */
2961 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2964 gfc_pure_function (gfc_expr
*e
, const char **name
)
2967 gfc_component
*comp
;
2971 if (e
->symtree
!= NULL
2972 && e
->symtree
->n
.sym
!= NULL
2973 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2974 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2976 comp
= gfc_get_proc_ptr_comp (e
);
2979 pure
= gfc_pure (comp
->ts
.interface
);
2982 else if (e
->value
.function
.esym
)
2984 pure
= gfc_pure (e
->value
.function
.esym
);
2985 *name
= e
->value
.function
.esym
->name
;
2987 else if (e
->value
.function
.isym
)
2989 pure
= e
->value
.function
.isym
->pure
2990 || e
->value
.function
.isym
->elemental
;
2991 *name
= e
->value
.function
.isym
->name
;
2995 /* Implicit functions are not pure. */
2997 *name
= e
->value
.function
.name
;
3004 /* Check if the expression is a reference to an implicitly pure function. */
3007 gfc_implicit_pure_function (gfc_expr
*e
)
3009 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3011 return gfc_implicit_pure (comp
->ts
.interface
);
3012 else if (e
->value
.function
.esym
)
3013 return gfc_implicit_pure (e
->value
.function
.esym
);
3020 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3021 int *f ATTRIBUTE_UNUSED
)
3025 /* Don't bother recursing into other statement functions
3026 since they will be checked individually for purity. */
3027 if (e
->expr_type
!= EXPR_FUNCTION
3029 || e
->symtree
->n
.sym
== sym
3030 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3033 return gfc_pure_function (e
, &name
) ? false : true;
3038 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3040 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3044 /* Check if an impure function is allowed in the current context. */
3046 static bool check_pure_function (gfc_expr
*e
)
3048 const char *name
= NULL
;
3049 if (!gfc_pure_function (e
, &name
) && name
)
3053 gfc_error ("Reference to impure function %qs at %L inside a "
3054 "FORALL %s", name
, &e
->where
,
3055 forall_flag
== 2 ? "mask" : "block");
3058 else if (gfc_do_concurrent_flag
)
3060 gfc_error ("Reference to impure function %qs at %L inside a "
3061 "DO CONCURRENT %s", name
, &e
->where
,
3062 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3065 else if (gfc_pure (NULL
))
3067 gfc_error ("Reference to impure function %qs at %L "
3068 "within a PURE procedure", name
, &e
->where
);
3071 if (!gfc_implicit_pure_function (e
))
3072 gfc_unset_implicit_pure (NULL
);
3078 /* Update current procedure's array_outer_dependency flag, considering
3079 a call to procedure SYM. */
3082 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3084 /* Check to see if this is a sibling function that has not yet
3086 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3087 for (; sibling
; sibling
= sibling
->sibling
)
3089 if (sibling
->proc_name
== sym
)
3091 gfc_resolve (sibling
);
3096 /* If SYM has references to outer arrays, so has the procedure calling
3097 SYM. If SYM is a procedure pointer, we can assume the worst. */
3098 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3099 && gfc_current_ns
->proc_name
)
3100 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3104 /* Resolve a function call, which means resolving the arguments, then figuring
3105 out which entity the name refers to. */
3108 resolve_function (gfc_expr
*expr
)
3110 gfc_actual_arglist
*arg
;
3114 procedure_type p
= PROC_INTRINSIC
;
3115 bool no_formal_args
;
3119 sym
= expr
->symtree
->n
.sym
;
3121 /* If this is a procedure pointer component, it has already been resolved. */
3122 if (gfc_is_proc_ptr_comp (expr
))
3125 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3127 if (sym
&& sym
->attr
.intrinsic
3128 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3129 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3132 if (sym
&& sym
->attr
.intrinsic
3133 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3136 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3138 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3142 /* If this is a deferred TBP with an abstract interface (which may
3143 of course be referenced), expr->value.function.esym will be set. */
3144 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3146 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3147 sym
->name
, &expr
->where
);
3151 /* If this is a deferred TBP with an abstract interface, its result
3152 cannot be an assumed length character (F2003: C418). */
3153 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3154 && sym
->result
->ts
.u
.cl
3155 && sym
->result
->ts
.u
.cl
->length
== NULL
3156 && !sym
->result
->ts
.deferred
)
3158 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3159 "character length result (F2008: C418)", sym
->name
,
3164 /* Switch off assumed size checking and do this again for certain kinds
3165 of procedure, once the procedure itself is resolved. */
3166 need_full_assumed_size
++;
3168 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3169 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3171 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3172 inquiry_argument
= true;
3173 no_formal_args
= sym
&& is_external_proc (sym
)
3174 && gfc_sym_get_dummy_args (sym
) == NULL
;
3176 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3179 inquiry_argument
= false;
3183 inquiry_argument
= false;
3185 /* Resume assumed_size checking. */
3186 need_full_assumed_size
--;
3188 /* If the procedure is external, check for usage. */
3189 if (sym
&& is_external_proc (sym
))
3190 resolve_global_procedure (sym
, &expr
->where
, 0);
3192 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3194 && sym
->ts
.u
.cl
->length
== NULL
3196 && !sym
->ts
.deferred
3197 && expr
->value
.function
.esym
== NULL
3198 && !sym
->attr
.contained
)
3200 /* Internal procedures are taken care of in resolve_contained_fntype. */
3201 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3202 "be used at %L since it is not a dummy argument",
3203 sym
->name
, &expr
->where
);
3207 /* See if function is already resolved. */
3209 if (expr
->value
.function
.name
!= NULL
3210 || expr
->value
.function
.isym
!= NULL
)
3212 if (expr
->ts
.type
== BT_UNKNOWN
)
3218 /* Apply the rules of section 14.1.2. */
3220 switch (procedure_kind (sym
))
3223 t
= resolve_generic_f (expr
);
3226 case PTYPE_SPECIFIC
:
3227 t
= resolve_specific_f (expr
);
3231 t
= resolve_unknown_f (expr
);
3235 gfc_internal_error ("resolve_function(): bad function type");
3239 /* If the expression is still a function (it might have simplified),
3240 then we check to see if we are calling an elemental function. */
3242 if (expr
->expr_type
!= EXPR_FUNCTION
)
3245 /* Walk the argument list looking for invalid BOZ. */
3246 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3247 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3249 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3250 "actual argument in a function reference",
3255 temp
= need_full_assumed_size
;
3256 need_full_assumed_size
= 0;
3258 if (!resolve_elemental_actual (expr
, NULL
))
3261 if (omp_workshare_flag
3262 && expr
->value
.function
.esym
3263 && ! gfc_elemental (expr
->value
.function
.esym
))
3265 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3266 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3271 #define GENERIC_ID expr->value.function.isym->id
3272 else if (expr
->value
.function
.actual
!= NULL
3273 && expr
->value
.function
.isym
!= NULL
3274 && GENERIC_ID
!= GFC_ISYM_LBOUND
3275 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3276 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3277 && GENERIC_ID
!= GFC_ISYM_LEN
3278 && GENERIC_ID
!= GFC_ISYM_LOC
3279 && GENERIC_ID
!= GFC_ISYM_C_LOC
3280 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3282 /* Array intrinsics must also have the last upper bound of an
3283 assumed size array argument. UBOUND and SIZE have to be
3284 excluded from the check if the second argument is anything
3287 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3289 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3290 && arg
== expr
->value
.function
.actual
3291 && arg
->next
!= NULL
&& arg
->next
->expr
)
3293 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3296 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3299 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3304 if (arg
->expr
!= NULL
3305 && arg
->expr
->rank
> 0
3306 && resolve_assumed_size_actual (arg
->expr
))
3312 need_full_assumed_size
= temp
;
3314 if (!check_pure_function(expr
))
3317 /* Functions without the RECURSIVE attribution are not allowed to
3318 * call themselves. */
3319 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3322 esym
= expr
->value
.function
.esym
;
3324 if (is_illegal_recursion (esym
, gfc_current_ns
))
3326 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3327 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3328 " function %qs is not RECURSIVE",
3329 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3331 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3332 " is not RECURSIVE", esym
->name
, &expr
->where
);
3338 /* Character lengths of use associated functions may contains references to
3339 symbols not referenced from the current program unit otherwise. Make sure
3340 those symbols are marked as referenced. */
3342 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3343 && expr
->value
.function
.esym
->attr
.use_assoc
)
3345 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3348 /* Make sure that the expression has a typespec that works. */
3349 if (expr
->ts
.type
== BT_UNKNOWN
)
3351 if (expr
->symtree
->n
.sym
->result
3352 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3353 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3354 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3357 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3359 if (expr
->value
.function
.esym
)
3360 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3362 update_current_proc_array_outer_dependency (sym
);
3365 /* typebound procedure: Assume the worst. */
3366 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3372 /************* Subroutine resolution *************/
3375 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3382 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3386 else if (gfc_do_concurrent_flag
)
3388 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3392 else if (gfc_pure (NULL
))
3394 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3398 gfc_unset_implicit_pure (NULL
);
3404 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3408 if (sym
->attr
.generic
)
3410 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3413 c
->resolved_sym
= s
;
3414 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3419 /* TODO: Need to search for elemental references in generic interface. */
3422 if (sym
->attr
.intrinsic
)
3423 return gfc_intrinsic_sub_interface (c
, 0);
3430 resolve_generic_s (gfc_code
*c
)
3435 sym
= c
->symtree
->n
.sym
;
3439 m
= resolve_generic_s0 (c
, sym
);
3442 else if (m
== MATCH_ERROR
)
3446 if (sym
->ns
->parent
== NULL
)
3448 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3452 if (!generic_sym (sym
))
3456 /* Last ditch attempt. See if the reference is to an intrinsic
3457 that possesses a matching interface. 14.1.2.4 */
3458 sym
= c
->symtree
->n
.sym
;
3460 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3462 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3463 sym
->name
, &c
->loc
);
3467 m
= gfc_intrinsic_sub_interface (c
, 0);
3471 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3472 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3478 /* Resolve a subroutine call known to be specific. */
3481 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3485 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3487 if (sym
->attr
.dummy
)
3489 sym
->attr
.proc
= PROC_DUMMY
;
3493 sym
->attr
.proc
= PROC_EXTERNAL
;
3497 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3500 if (sym
->attr
.intrinsic
)
3502 m
= gfc_intrinsic_sub_interface (c
, 1);
3506 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3507 "with an intrinsic", sym
->name
, &c
->loc
);
3515 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3517 c
->resolved_sym
= sym
;
3518 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3526 resolve_specific_s (gfc_code
*c
)
3531 sym
= c
->symtree
->n
.sym
;
3535 m
= resolve_specific_s0 (c
, sym
);
3538 if (m
== MATCH_ERROR
)
3541 if (sym
->ns
->parent
== NULL
)
3544 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3550 sym
= c
->symtree
->n
.sym
;
3551 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3552 sym
->name
, &c
->loc
);
3558 /* Resolve a subroutine call not known to be generic nor specific. */
3561 resolve_unknown_s (gfc_code
*c
)
3565 sym
= c
->symtree
->n
.sym
;
3567 if (sym
->attr
.dummy
)
3569 sym
->attr
.proc
= PROC_DUMMY
;
3573 /* See if we have an intrinsic function reference. */
3575 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3577 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3582 /* The reference is to an external name. */
3585 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3587 c
->resolved_sym
= sym
;
3589 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3593 /* Resolve a subroutine call. Although it was tempting to use the same code
3594 for functions, subroutines and functions are stored differently and this
3595 makes things awkward. */
3598 resolve_call (gfc_code
*c
)
3601 procedure_type ptype
= PROC_INTRINSIC
;
3602 gfc_symbol
*csym
, *sym
;
3603 bool no_formal_args
;
3605 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3607 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3609 gfc_error ("%qs at %L has a type, which is not consistent with "
3610 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3614 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3617 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3618 sym
= st
? st
->n
.sym
: NULL
;
3619 if (sym
&& csym
!= sym
3620 && sym
->ns
== gfc_current_ns
3621 && sym
->attr
.flavor
== FL_PROCEDURE
3622 && sym
->attr
.contained
)
3625 if (csym
->attr
.generic
)
3626 c
->symtree
->n
.sym
= sym
;
3629 csym
= c
->symtree
->n
.sym
;
3633 /* If this ia a deferred TBP, c->expr1 will be set. */
3634 if (!c
->expr1
&& csym
)
3636 if (csym
->attr
.abstract
)
3638 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3639 csym
->name
, &c
->loc
);
3643 /* Subroutines without the RECURSIVE attribution are not allowed to
3645 if (is_illegal_recursion (csym
, gfc_current_ns
))
3647 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3648 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3649 "as subroutine %qs is not RECURSIVE",
3650 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3652 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3653 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3659 /* Switch off assumed size checking and do this again for certain kinds
3660 of procedure, once the procedure itself is resolved. */
3661 need_full_assumed_size
++;
3664 ptype
= csym
->attr
.proc
;
3666 no_formal_args
= csym
&& is_external_proc (csym
)
3667 && gfc_sym_get_dummy_args (csym
) == NULL
;
3668 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3671 /* Resume assumed_size checking. */
3672 need_full_assumed_size
--;
3674 /* If external, check for usage. */
3675 if (csym
&& is_external_proc (csym
))
3676 resolve_global_procedure (csym
, &c
->loc
, 1);
3679 if (c
->resolved_sym
== NULL
)
3681 c
->resolved_isym
= NULL
;
3682 switch (procedure_kind (csym
))
3685 t
= resolve_generic_s (c
);
3688 case PTYPE_SPECIFIC
:
3689 t
= resolve_specific_s (c
);
3693 t
= resolve_unknown_s (c
);
3697 gfc_internal_error ("resolve_subroutine(): bad function type");
3701 /* Some checks of elemental subroutine actual arguments. */
3702 if (!resolve_elemental_actual (NULL
, c
))
3706 update_current_proc_array_outer_dependency (csym
);
3708 /* Typebound procedure: Assume the worst. */
3709 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3715 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3716 op1->shape and op2->shape are non-NULL return true if their shapes
3717 match. If both op1->shape and op2->shape are non-NULL return false
3718 if their shapes do not match. If either op1->shape or op2->shape is
3719 NULL, return true. */
3722 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3729 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3731 for (i
= 0; i
< op1
->rank
; i
++)
3733 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3735 gfc_error ("Shapes for operands at %L and %L are not conformable",
3736 &op1
->where
, &op2
->where
);
3746 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3747 For example A .AND. B becomes IAND(A, B). */
3749 logical_to_bitwise (gfc_expr
*e
)
3751 gfc_expr
*tmp
, *op1
, *op2
;
3753 gfc_actual_arglist
*args
= NULL
;
3755 gcc_assert (e
->expr_type
== EXPR_OP
);
3757 isym
= GFC_ISYM_NONE
;
3758 op1
= e
->value
.op
.op1
;
3759 op2
= e
->value
.op
.op2
;
3761 switch (e
->value
.op
.op
)
3764 isym
= GFC_ISYM_NOT
;
3767 isym
= GFC_ISYM_IAND
;
3770 isym
= GFC_ISYM_IOR
;
3772 case INTRINSIC_NEQV
:
3773 isym
= GFC_ISYM_IEOR
;
3776 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3777 Change the old expression to NEQV, which will get replaced by IEOR,
3778 and wrap it in NOT. */
3779 tmp
= gfc_copy_expr (e
);
3780 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3781 tmp
= logical_to_bitwise (tmp
);
3782 isym
= GFC_ISYM_NOT
;
3787 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3790 /* Inherit the original operation's operands as arguments. */
3791 args
= gfc_get_actual_arglist ();
3795 args
->next
= gfc_get_actual_arglist ();
3796 args
->next
->expr
= op2
;
3799 /* Convert the expression to a function call. */
3800 e
->expr_type
= EXPR_FUNCTION
;
3801 e
->value
.function
.actual
= args
;
3802 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3803 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3804 e
->value
.function
.esym
= NULL
;
3806 /* Make up a pre-resolved function call symtree if we need to. */
3807 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3810 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3811 sym
= e
->symtree
->n
.sym
;
3813 sym
->attr
.flavor
= FL_PROCEDURE
;
3814 sym
->attr
.function
= 1;
3815 sym
->attr
.elemental
= 1;
3817 sym
->attr
.referenced
= 1;
3818 gfc_intrinsic_symbol (sym
);
3819 gfc_commit_symbol (sym
);
3822 args
->name
= e
->value
.function
.isym
->formal
->name
;
3823 if (e
->value
.function
.isym
->formal
->next
)
3824 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3829 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3830 candidates in CANDIDATES_LEN. */
3832 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3834 size_t &candidates_len
)
3841 /* Not sure how to properly filter here. Use all for a start.
3842 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3843 these as i suppose they don't make terribly sense. */
3845 if (uop
->n
.uop
->op
!= NULL
)
3846 vec_push (candidates
, candidates_len
, uop
->name
);
3850 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3854 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3857 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3860 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3862 char **candidates
= NULL
;
3863 size_t candidates_len
= 0;
3864 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3865 return gfc_closest_fuzzy_match (op
, candidates
);
3869 /* Callback finding an impure function as an operand to an .and. or
3870 .or. expression. Remember the last function warned about to
3871 avoid double warnings when recursing. */
3874 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3879 static gfc_expr
*last
= NULL
;
3880 bool *found
= (bool *) data
;
3882 if (f
->expr_type
== EXPR_FUNCTION
)
3885 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3886 && !gfc_implicit_pure_function (f
))
3889 gfc_warning (OPT_Wfunction_elimination
,
3890 "Impure function %qs at %L might not be evaluated",
3893 gfc_warning (OPT_Wfunction_elimination
,
3894 "Impure function at %L might not be evaluated",
3903 /* Return true if TYPE is character based, false otherwise. */
3906 is_character_based (bt type
)
3908 return type
== BT_CHARACTER
|| type
== BT_HOLLERITH
;
3912 /* If expression is a hollerith, convert it to character and issue a warning
3913 for the conversion. */
3916 convert_hollerith_to_character (gfc_expr
*e
)
3918 if (e
->ts
.type
== BT_HOLLERITH
)
3922 t
.type
= BT_CHARACTER
;
3923 t
.kind
= e
->ts
.kind
;
3924 gfc_convert_type_warn (e
, &t
, 2, 1);
3928 /* Convert to numeric and issue a warning for the conversion. */
3931 convert_to_numeric (gfc_expr
*a
, gfc_expr
*b
)
3935 t
.type
= b
->ts
.type
;
3936 t
.kind
= b
->ts
.kind
;
3937 gfc_convert_type_warn (a
, &t
, 2, 1);
3940 /* Resolve an operator expression node. This can involve replacing the
3941 operation with a user defined function call. */
3944 resolve_operator (gfc_expr
*e
)
3946 gfc_expr
*op1
, *op2
;
3948 bool dual_locus_error
;
3951 /* Resolve all subnodes-- give them types. */
3953 switch (e
->value
.op
.op
)
3956 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3962 case INTRINSIC_UPLUS
:
3963 case INTRINSIC_UMINUS
:
3964 case INTRINSIC_PARENTHESES
:
3965 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3968 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3970 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3971 "unary operator %qs", &e
->value
.op
.op1
->where
,
3972 gfc_op2string (e
->value
.op
.op
));
3978 /* Typecheck the new node. */
3980 op1
= e
->value
.op
.op1
;
3981 op2
= e
->value
.op
.op2
;
3982 dual_locus_error
= false;
3984 /* op1 and op2 cannot both be BOZ. */
3985 if (op1
&& op1
->ts
.type
== BT_BOZ
3986 && op2
&& op2
->ts
.type
== BT_BOZ
)
3988 gfc_error ("Operands at %L and %L cannot appear as operands of "
3989 "binary operator %qs", &op1
->where
, &op2
->where
,
3990 gfc_op2string (e
->value
.op
.op
));
3994 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3995 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3997 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
4001 switch (e
->value
.op
.op
)
4003 case INTRINSIC_UPLUS
:
4004 case INTRINSIC_UMINUS
:
4005 if (op1
->ts
.type
== BT_INTEGER
4006 || op1
->ts
.type
== BT_REAL
4007 || op1
->ts
.type
== BT_COMPLEX
)
4013 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
4014 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
4017 case INTRINSIC_PLUS
:
4018 case INTRINSIC_MINUS
:
4019 case INTRINSIC_TIMES
:
4020 case INTRINSIC_DIVIDE
:
4021 case INTRINSIC_POWER
:
4022 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4024 gfc_type_convert_binary (e
, 1);
4028 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
4030 _("Unexpected derived-type entities in binary intrinsic "
4031 "numeric operator %%<%s%%> at %%L"),
4032 gfc_op2string (e
->value
.op
.op
));
4035 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4036 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4037 gfc_typename (op2
));
4040 case INTRINSIC_CONCAT
:
4041 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4042 && op1
->ts
.kind
== op2
->ts
.kind
)
4044 e
->ts
.type
= BT_CHARACTER
;
4045 e
->ts
.kind
= op1
->ts
.kind
;
4050 _("Operands of string concatenation operator at %%L are %s/%s"),
4051 gfc_typename (op1
), gfc_typename (op2
));
4057 case INTRINSIC_NEQV
:
4058 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4060 e
->ts
.type
= BT_LOGICAL
;
4061 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4062 if (op1
->ts
.kind
< e
->ts
.kind
)
4063 gfc_convert_type (op1
, &e
->ts
, 2);
4064 else if (op2
->ts
.kind
< e
->ts
.kind
)
4065 gfc_convert_type (op2
, &e
->ts
, 2);
4067 if (flag_frontend_optimize
&&
4068 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4070 /* Warn about short-circuiting
4071 with impure function as second operand. */
4073 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4078 /* Logical ops on integers become bitwise ops with -fdec. */
4080 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4082 e
->ts
.type
= BT_INTEGER
;
4083 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4084 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4085 gfc_convert_type (op1
, &e
->ts
, 1);
4086 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4087 gfc_convert_type (op2
, &e
->ts
, 1);
4088 e
= logical_to_bitwise (e
);
4092 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4093 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4094 gfc_typename (op2
));
4099 /* Logical ops on integers become bitwise ops with -fdec. */
4100 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4102 e
->ts
.type
= BT_INTEGER
;
4103 e
->ts
.kind
= op1
->ts
.kind
;
4104 e
= logical_to_bitwise (e
);
4108 if (op1
->ts
.type
== BT_LOGICAL
)
4110 e
->ts
.type
= BT_LOGICAL
;
4111 e
->ts
.kind
= op1
->ts
.kind
;
4115 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4116 gfc_typename (op1
));
4120 case INTRINSIC_GT_OS
:
4122 case INTRINSIC_GE_OS
:
4124 case INTRINSIC_LT_OS
:
4126 case INTRINSIC_LE_OS
:
4127 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4129 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4136 case INTRINSIC_EQ_OS
:
4138 case INTRINSIC_NE_OS
:
4141 && is_character_based (op1
->ts
.type
)
4142 && is_character_based (op2
->ts
.type
))
4144 convert_hollerith_to_character (op1
);
4145 convert_hollerith_to_character (op2
);
4148 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4149 && op1
->ts
.kind
== op2
->ts
.kind
)
4151 e
->ts
.type
= BT_LOGICAL
;
4152 e
->ts
.kind
= gfc_default_logical_kind
;
4156 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4157 if (op1
->ts
.type
== BT_BOZ
)
4159 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4160 "an operand of a relational operator",
4164 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4167 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4171 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4172 if (op2
->ts
.type
== BT_BOZ
)
4174 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4175 "an operand of a relational operator",
4179 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4182 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4186 && op1
->ts
.type
== BT_HOLLERITH
&& gfc_numeric_ts (&op2
->ts
))
4187 convert_to_numeric (op1
, op2
);
4190 && gfc_numeric_ts (&op1
->ts
) && op2
->ts
.type
== BT_HOLLERITH
)
4191 convert_to_numeric (op2
, op1
);
4193 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4195 gfc_type_convert_binary (e
, 1);
4197 e
->ts
.type
= BT_LOGICAL
;
4198 e
->ts
.kind
= gfc_default_logical_kind
;
4200 if (warn_compare_reals
)
4202 gfc_intrinsic_op op
= e
->value
.op
.op
;
4204 /* Type conversion has made sure that the types of op1 and op2
4205 agree, so it is only necessary to check the first one. */
4206 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4207 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4208 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4212 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4213 msg
= "Equality comparison for %s at %L";
4215 msg
= "Inequality comparison for %s at %L";
4217 gfc_warning (OPT_Wcompare_reals
, msg
,
4218 gfc_typename (op1
), &op1
->where
);
4225 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4227 _("Logicals at %%L must be compared with %s instead of %s"),
4228 (e
->value
.op
.op
== INTRINSIC_EQ
4229 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4230 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4233 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4234 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4235 gfc_typename (op2
));
4239 case INTRINSIC_USER
:
4240 if (e
->value
.op
.uop
->op
== NULL
)
4242 const char *name
= e
->value
.op
.uop
->name
;
4243 const char *guessed
;
4244 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4246 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4249 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4251 else if (op2
== NULL
)
4252 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4253 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4256 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4257 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4258 gfc_typename (op2
));
4259 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4264 case INTRINSIC_PARENTHESES
:
4266 if (e
->ts
.type
== BT_CHARACTER
)
4267 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4271 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4274 /* Deal with arrayness of an operand through an operator. */
4276 switch (e
->value
.op
.op
)
4278 case INTRINSIC_PLUS
:
4279 case INTRINSIC_MINUS
:
4280 case INTRINSIC_TIMES
:
4281 case INTRINSIC_DIVIDE
:
4282 case INTRINSIC_POWER
:
4283 case INTRINSIC_CONCAT
:
4287 case INTRINSIC_NEQV
:
4289 case INTRINSIC_EQ_OS
:
4291 case INTRINSIC_NE_OS
:
4293 case INTRINSIC_GT_OS
:
4295 case INTRINSIC_GE_OS
:
4297 case INTRINSIC_LT_OS
:
4299 case INTRINSIC_LE_OS
:
4301 if (op1
->rank
== 0 && op2
->rank
== 0)
4304 if (op1
->rank
== 0 && op2
->rank
!= 0)
4306 e
->rank
= op2
->rank
;
4308 if (e
->shape
== NULL
)
4309 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4312 if (op1
->rank
!= 0 && op2
->rank
== 0)
4314 e
->rank
= op1
->rank
;
4316 if (e
->shape
== NULL
)
4317 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4320 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4322 if (op1
->rank
== op2
->rank
)
4324 e
->rank
= op1
->rank
;
4325 if (e
->shape
== NULL
)
4327 t
= compare_shapes (op1
, op2
);
4331 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4336 /* Allow higher level expressions to work. */
4339 /* Try user-defined operators, and otherwise throw an error. */
4340 dual_locus_error
= true;
4342 _("Inconsistent ranks for operator at %%L and %%L"));
4349 case INTRINSIC_PARENTHESES
:
4351 case INTRINSIC_UPLUS
:
4352 case INTRINSIC_UMINUS
:
4353 /* Simply copy arrayness attribute */
4354 e
->rank
= op1
->rank
;
4356 if (e
->shape
== NULL
)
4357 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4367 /* Attempt to simplify the expression. */
4370 t
= gfc_simplify_expr (e
, 0);
4371 /* Some calls do not succeed in simplification and return false
4372 even though there is no error; e.g. variable references to
4373 PARAMETER arrays. */
4374 if (!gfc_is_constant_expr (e
))
4382 match m
= gfc_extend_expr (e
);
4385 if (m
== MATCH_ERROR
)
4389 if (dual_locus_error
)
4390 gfc_error (msg
, &op1
->where
, &op2
->where
);
4392 gfc_error (msg
, &e
->where
);
4398 /************** Array resolution subroutines **************/
4401 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4403 /* Compare two integer expressions. */
4405 static compare_result
4406 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4410 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4411 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4414 /* If either of the types isn't INTEGER, we must have
4415 raised an error earlier. */
4417 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4420 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4430 /* Compare an integer expression with an integer. */
4432 static compare_result
4433 compare_bound_int (gfc_expr
*a
, int b
)
4437 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4440 if (a
->ts
.type
!= BT_INTEGER
)
4441 gfc_internal_error ("compare_bound_int(): Bad expression");
4443 i
= mpz_cmp_si (a
->value
.integer
, b
);
4453 /* Compare an integer expression with a mpz_t. */
4455 static compare_result
4456 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4460 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4463 if (a
->ts
.type
!= BT_INTEGER
)
4464 gfc_internal_error ("compare_bound_int(): Bad expression");
4466 i
= mpz_cmp (a
->value
.integer
, b
);
4476 /* Compute the last value of a sequence given by a triplet.
4477 Return 0 if it wasn't able to compute the last value, or if the
4478 sequence if empty, and 1 otherwise. */
4481 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4482 gfc_expr
*stride
, mpz_t last
)
4486 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4487 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4488 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4491 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4492 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4495 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4497 if (compare_bound (start
, end
) == CMP_GT
)
4499 mpz_set (last
, end
->value
.integer
);
4503 if (compare_bound_int (stride
, 0) == CMP_GT
)
4505 /* Stride is positive */
4506 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4511 /* Stride is negative */
4512 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4517 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4518 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4519 mpz_sub (last
, end
->value
.integer
, rem
);
4526 /* Compare a single dimension of an array reference to the array
4530 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4534 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4536 gcc_assert (ar
->stride
[i
] == NULL
);
4537 /* This implies [*] as [*:] and [*:3] are not possible. */
4538 if (ar
->start
[i
] == NULL
)
4540 gcc_assert (ar
->end
[i
] == NULL
);
4545 /* Given start, end and stride values, calculate the minimum and
4546 maximum referenced indexes. */
4548 switch (ar
->dimen_type
[i
])
4551 case DIMEN_THIS_IMAGE
:
4556 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4559 gfc_warning (0, "Array reference at %L is out of bounds "
4560 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4561 mpz_get_si (ar
->start
[i
]->value
.integer
),
4562 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4564 gfc_warning (0, "Array reference at %L is out of bounds "
4565 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4566 mpz_get_si (ar
->start
[i
]->value
.integer
),
4567 mpz_get_si (as
->lower
[i
]->value
.integer
),
4571 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4574 gfc_warning (0, "Array reference at %L is out of bounds "
4575 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4576 mpz_get_si (ar
->start
[i
]->value
.integer
),
4577 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4579 gfc_warning (0, "Array reference at %L is out of bounds "
4580 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4581 mpz_get_si (ar
->start
[i
]->value
.integer
),
4582 mpz_get_si (as
->upper
[i
]->value
.integer
),
4591 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4592 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4594 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4596 /* Check for zero stride, which is not allowed. */
4597 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4599 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4603 /* if start == len || (stride > 0 && start < len)
4604 || (stride < 0 && start > len),
4605 then the array section contains at least one element. In this
4606 case, there is an out-of-bounds access if
4607 (start < lower || start > upper). */
4608 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4609 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4610 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4611 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4612 && comp_start_end
== CMP_GT
))
4614 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4616 gfc_warning (0, "Lower array reference at %L is out of bounds "
4617 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4618 mpz_get_si (AR_START
->value
.integer
),
4619 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4622 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4624 gfc_warning (0, "Lower array reference at %L is out of bounds "
4625 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4626 mpz_get_si (AR_START
->value
.integer
),
4627 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4632 /* If we can compute the highest index of the array section,
4633 then it also has to be between lower and upper. */
4634 mpz_init (last_value
);
4635 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4638 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4640 gfc_warning (0, "Upper array reference at %L is out of bounds "
4641 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4642 mpz_get_si (last_value
),
4643 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4644 mpz_clear (last_value
);
4647 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4649 gfc_warning (0, "Upper array reference at %L is out of bounds "
4650 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4651 mpz_get_si (last_value
),
4652 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4653 mpz_clear (last_value
);
4657 mpz_clear (last_value
);
4665 gfc_internal_error ("check_dimension(): Bad array reference");
4672 /* Compare an array reference with an array specification. */
4675 compare_spec_to_ref (gfc_array_ref
*ar
)
4682 /* TODO: Full array sections are only allowed as actual parameters. */
4683 if (as
->type
== AS_ASSUMED_SIZE
4684 && (/*ar->type == AR_FULL
4685 ||*/ (ar
->type
== AR_SECTION
4686 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4688 gfc_error ("Rightmost upper bound of assumed size array section "
4689 "not specified at %L", &ar
->where
);
4693 if (ar
->type
== AR_FULL
)
4696 if (as
->rank
!= ar
->dimen
)
4698 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4699 &ar
->where
, ar
->dimen
, as
->rank
);
4703 /* ar->codimen == 0 is a local array. */
4704 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4706 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4707 &ar
->where
, ar
->codimen
, as
->corank
);
4711 for (i
= 0; i
< as
->rank
; i
++)
4712 if (!check_dimension (i
, ar
, as
))
4715 /* Local access has no coarray spec. */
4716 if (ar
->codimen
!= 0)
4717 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4719 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4720 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4722 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4723 i
+ 1 - as
->rank
, &ar
->where
);
4726 if (!check_dimension (i
, ar
, as
))
4734 /* Resolve one part of an array index. */
4737 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4738 int force_index_integer_kind
)
4745 if (!gfc_resolve_expr (index
))
4748 if (check_scalar
&& index
->rank
!= 0)
4750 gfc_error ("Array index at %L must be scalar", &index
->where
);
4754 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4756 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4757 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4761 if (index
->ts
.type
== BT_REAL
)
4762 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4766 if ((index
->ts
.kind
!= gfc_index_integer_kind
4767 && force_index_integer_kind
)
4768 || index
->ts
.type
!= BT_INTEGER
)
4771 ts
.type
= BT_INTEGER
;
4772 ts
.kind
= gfc_index_integer_kind
;
4774 gfc_convert_type_warn (index
, &ts
, 2, 0);
4780 /* Resolve one part of an array index. */
4783 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4785 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4788 /* Resolve a dim argument to an intrinsic function. */
4791 gfc_resolve_dim_arg (gfc_expr
*dim
)
4796 if (!gfc_resolve_expr (dim
))
4801 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4806 if (dim
->ts
.type
!= BT_INTEGER
)
4808 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4812 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4817 ts
.type
= BT_INTEGER
;
4818 ts
.kind
= gfc_index_integer_kind
;
4820 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4826 /* Given an expression that contains array references, update those array
4827 references to point to the right array specifications. While this is
4828 filled in during matching, this information is difficult to save and load
4829 in a module, so we take care of it here.
4831 The idea here is that the original array reference comes from the
4832 base symbol. We traverse the list of reference structures, setting
4833 the stored reference to references. Component references can
4834 provide an additional array specification. */
4837 find_array_spec (gfc_expr
*e
)
4842 bool class_as
= false;
4844 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4846 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4850 as
= e
->symtree
->n
.sym
->as
;
4852 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4857 gfc_internal_error ("find_array_spec(): Missing spec");
4864 c
= ref
->u
.c
.component
;
4865 if (c
->attr
.dimension
)
4867 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4868 gfc_internal_error ("find_array_spec(): unused as(1)");
4880 gfc_internal_error ("find_array_spec(): unused as(2)");
4884 /* Resolve an array reference. */
4887 resolve_array_ref (gfc_array_ref
*ar
)
4889 int i
, check_scalar
;
4892 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4894 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4896 /* Do not force gfc_index_integer_kind for the start. We can
4897 do fine with any integer kind. This avoids temporary arrays
4898 created for indexing with a vector. */
4899 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4901 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4903 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4908 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4912 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4916 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4917 if (e
->expr_type
== EXPR_VARIABLE
4918 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4919 ar
->start
[i
] = gfc_get_parentheses (e
);
4923 gfc_error ("Array index at %L is an array of rank %d",
4924 &ar
->c_where
[i
], e
->rank
);
4928 /* Fill in the upper bound, which may be lower than the
4929 specified one for something like a(2:10:5), which is
4930 identical to a(2:7:5). Only relevant for strides not equal
4931 to one. Don't try a division by zero. */
4932 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4933 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4934 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4935 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4939 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4941 if (ar
->end
[i
] == NULL
)
4944 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4946 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4948 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4949 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4951 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4962 if (ar
->type
== AR_FULL
)
4964 if (ar
->as
->rank
== 0)
4965 ar
->type
= AR_ELEMENT
;
4967 /* Make sure array is the same as array(:,:), this way
4968 we don't need to special case all the time. */
4969 ar
->dimen
= ar
->as
->rank
;
4970 for (i
= 0; i
< ar
->dimen
; i
++)
4972 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4974 gcc_assert (ar
->start
[i
] == NULL
);
4975 gcc_assert (ar
->end
[i
] == NULL
);
4976 gcc_assert (ar
->stride
[i
] == NULL
);
4980 /* If the reference type is unknown, figure out what kind it is. */
4982 if (ar
->type
== AR_UNKNOWN
)
4984 ar
->type
= AR_ELEMENT
;
4985 for (i
= 0; i
< ar
->dimen
; i
++)
4986 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4987 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4989 ar
->type
= AR_SECTION
;
4994 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4997 if (ar
->as
->corank
&& ar
->codimen
== 0)
5000 ar
->codimen
= ar
->as
->corank
;
5001 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
5002 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
5010 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
5012 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
5014 if (ref
->u
.ss
.start
!= NULL
)
5016 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
5019 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
5021 gfc_error ("Substring start index at %L must be of type INTEGER",
5022 &ref
->u
.ss
.start
->where
);
5026 if (ref
->u
.ss
.start
->rank
!= 0)
5028 gfc_error ("Substring start index at %L must be scalar",
5029 &ref
->u
.ss
.start
->where
);
5033 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
5034 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5035 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5037 gfc_error ("Substring start index at %L is less than one",
5038 &ref
->u
.ss
.start
->where
);
5043 if (ref
->u
.ss
.end
!= NULL
)
5045 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
5048 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
5050 gfc_error ("Substring end index at %L must be of type INTEGER",
5051 &ref
->u
.ss
.end
->where
);
5055 if (ref
->u
.ss
.end
->rank
!= 0)
5057 gfc_error ("Substring end index at %L must be scalar",
5058 &ref
->u
.ss
.end
->where
);
5062 if (ref
->u
.ss
.length
!= NULL
5063 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5064 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5065 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5067 gfc_error ("Substring end index at %L exceeds the string length",
5068 &ref
->u
.ss
.start
->where
);
5072 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5073 gfc_integer_kinds
[k
].huge
) == CMP_GT
5074 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5075 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5077 gfc_error ("Substring end index at %L is too large",
5078 &ref
->u
.ss
.end
->where
);
5081 /* If the substring has the same length as the original
5082 variable, the reference itself can be deleted. */
5084 if (ref
->u
.ss
.length
!= NULL
5085 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5086 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5087 *equal_length
= true;
5094 /* This function supplies missing substring charlens. */
5097 gfc_resolve_substring_charlen (gfc_expr
*e
)
5100 gfc_expr
*start
, *end
;
5101 gfc_typespec
*ts
= NULL
;
5104 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5106 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5108 if (char_ref
->type
== REF_COMPONENT
)
5109 ts
= &char_ref
->u
.c
.component
->ts
;
5112 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5115 gcc_assert (char_ref
->next
== NULL
);
5119 if (e
->ts
.u
.cl
->length
)
5120 gfc_free_expr (e
->ts
.u
.cl
->length
);
5121 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5125 e
->ts
.type
= BT_CHARACTER
;
5126 e
->ts
.kind
= gfc_default_character_kind
;
5129 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5131 if (char_ref
->u
.ss
.start
)
5132 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5134 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5136 if (char_ref
->u
.ss
.end
)
5137 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5138 else if (e
->expr_type
== EXPR_VARIABLE
)
5141 ts
= &e
->symtree
->n
.sym
->ts
;
5142 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5149 gfc_free_expr (start
);
5150 gfc_free_expr (end
);
5154 /* Length = (end - start + 1).
5155 Check first whether it has a constant length. */
5156 if (gfc_dep_difference (end
, start
, &diff
))
5158 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5161 mpz_add_ui (len
->value
.integer
, diff
, 1);
5163 e
->ts
.u
.cl
->length
= len
;
5164 /* The check for length < 0 is handled below */
5168 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5169 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5170 gfc_get_int_expr (gfc_charlen_int_kind
,
5174 /* F2008, 6.4.1: Both the starting point and the ending point shall
5175 be within the range 1, 2, ..., n unless the starting point exceeds
5176 the ending point, in which case the substring has length zero. */
5178 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5179 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5181 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5182 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5184 /* Make sure that the length is simplified. */
5185 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5186 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5190 /* Resolve subtype references. */
5193 gfc_resolve_ref (gfc_expr
*expr
)
5195 int current_part_dimension
, n_components
, seen_part_dimension
;
5196 gfc_ref
*ref
, **prev
;
5199 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5200 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5202 find_array_spec (expr
);
5206 for (prev
= &expr
->ref
; *prev
!= NULL
;
5207 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5208 switch ((*prev
)->type
)
5211 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5220 equal_length
= false;
5221 if (!resolve_substring (*prev
, &equal_length
))
5224 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5226 /* Remove the reference and move the charlen, if any. */
5230 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5231 ref
->u
.ss
.length
= NULL
;
5232 gfc_free_ref_list (ref
);
5237 /* Check constraints on part references. */
5239 current_part_dimension
= 0;
5240 seen_part_dimension
= 0;
5243 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5248 switch (ref
->u
.ar
.type
)
5251 /* Coarray scalar. */
5252 if (ref
->u
.ar
.as
->rank
== 0)
5254 current_part_dimension
= 0;
5259 current_part_dimension
= 1;
5263 current_part_dimension
= 0;
5267 gfc_internal_error ("resolve_ref(): Bad array reference");
5273 if (current_part_dimension
|| seen_part_dimension
)
5276 if (ref
->u
.c
.component
->attr
.pointer
5277 || ref
->u
.c
.component
->attr
.proc_pointer
5278 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5279 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5281 gfc_error ("Component to the right of a part reference "
5282 "with nonzero rank must not have the POINTER "
5283 "attribute at %L", &expr
->where
);
5286 else if (ref
->u
.c
.component
->attr
.allocatable
5287 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5288 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5291 gfc_error ("Component to the right of a part reference "
5292 "with nonzero rank must not have the ALLOCATABLE "
5293 "attribute at %L", &expr
->where
);
5306 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5307 || ref
->next
== NULL
)
5308 && current_part_dimension
5309 && seen_part_dimension
)
5311 gfc_error ("Two or more part references with nonzero rank must "
5312 "not be specified at %L", &expr
->where
);
5316 if (ref
->type
== REF_COMPONENT
)
5318 if (current_part_dimension
)
5319 seen_part_dimension
= 1;
5321 /* reset to make sure */
5322 current_part_dimension
= 0;
5330 /* Given an expression, determine its shape. This is easier than it sounds.
5331 Leaves the shape array NULL if it is not possible to determine the shape. */
5334 expression_shape (gfc_expr
*e
)
5336 mpz_t array
[GFC_MAX_DIMENSIONS
];
5339 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5342 for (i
= 0; i
< e
->rank
; i
++)
5343 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5346 e
->shape
= gfc_get_shape (e
->rank
);
5348 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5353 for (i
--; i
>= 0; i
--)
5354 mpz_clear (array
[i
]);
5358 /* Given a variable expression node, compute the rank of the expression by
5359 examining the base symbol and any reference structures it may have. */
5362 gfc_expression_rank (gfc_expr
*e
)
5367 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5368 could lead to serious confusion... */
5369 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5373 if (e
->expr_type
== EXPR_ARRAY
)
5375 /* Constructors can have a rank different from one via RESHAPE(). */
5377 e
->rank
= ((e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
)
5378 ? 0 : e
->symtree
->n
.sym
->as
->rank
);
5384 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5386 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5387 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5388 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5390 if (ref
->type
!= REF_ARRAY
)
5393 if (ref
->u
.ar
.type
== AR_FULL
)
5395 rank
= ref
->u
.ar
.as
->rank
;
5399 if (ref
->u
.ar
.type
== AR_SECTION
)
5401 /* Figure out the rank of the section. */
5403 gfc_internal_error ("gfc_expression_rank(): Two array specs");
5405 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5406 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5407 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5417 expression_shape (e
);
5422 add_caf_get_intrinsic (gfc_expr
*e
)
5424 gfc_expr
*wrapper
, *tmp_expr
;
5428 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5429 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5434 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5435 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5438 tmp_expr
= XCNEW (gfc_expr
);
5440 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5441 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5442 wrapper
->ts
= e
->ts
;
5443 wrapper
->rank
= e
->rank
;
5445 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5452 remove_caf_get_intrinsic (gfc_expr
*e
)
5454 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5455 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5456 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5457 e
->value
.function
.actual
->expr
= NULL
;
5458 gfc_free_actual_arglist (e
->value
.function
.actual
);
5459 gfc_free_shape (&e
->shape
, e
->rank
);
5465 /* Resolve a variable expression. */
5468 resolve_variable (gfc_expr
*e
)
5475 if (e
->symtree
== NULL
)
5477 sym
= e
->symtree
->n
.sym
;
5479 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5480 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5481 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5483 if (!actual_arg
|| inquiry_argument
)
5485 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5486 "be used as actual argument", sym
->name
, &e
->where
);
5490 /* TS 29113, 407b. */
5491 else if (e
->ts
.type
== BT_ASSUMED
)
5495 gfc_error ("Assumed-type variable %s at %L may only be used "
5496 "as actual argument", sym
->name
, &e
->where
);
5499 else if (inquiry_argument
&& !first_actual_arg
)
5501 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5502 for all inquiry functions in resolve_function; the reason is
5503 that the function-name resolution happens too late in that
5505 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5506 "an inquiry function shall be the first argument",
5507 sym
->name
, &e
->where
);
5511 /* TS 29113, C535b. */
5512 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5513 && CLASS_DATA (sym
)->as
5514 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5515 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5516 && sym
->as
->type
== AS_ASSUMED_RANK
))
5517 && !sym
->attr
.select_rank_temporary
)
5520 && !(cs_base
&& cs_base
->current
5521 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5523 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5524 "actual argument", sym
->name
, &e
->where
);
5527 else if (inquiry_argument
&& !first_actual_arg
)
5529 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5530 for all inquiry functions in resolve_function; the reason is
5531 that the function-name resolution happens too late in that
5533 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5534 "to an inquiry function shall be the first argument",
5535 sym
->name
, &e
->where
);
5540 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5541 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5542 && e
->ref
->next
== NULL
))
5544 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5545 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5548 /* TS 29113, 407b. */
5549 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5550 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5551 && e
->ref
->next
== NULL
))
5553 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5554 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5558 /* TS 29113, C535b. */
5559 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5560 && CLASS_DATA (sym
)->as
5561 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5562 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5563 && sym
->as
->type
== AS_ASSUMED_RANK
))
5565 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5566 && e
->ref
->next
== NULL
))
5568 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5569 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5573 /* For variables that are used in an associate (target => object) where
5574 the object's basetype is array valued while the target is scalar,
5575 the ts' type of the component refs is still array valued, which
5576 can't be translated that way. */
5577 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5578 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5579 && CLASS_DATA (sym
->assoc
->target
)->as
)
5581 gfc_ref
*ref
= e
->ref
;
5587 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5588 /* Stop the loop. */
5598 /* If this is an associate-name, it may be parsed with an array reference
5599 in error even though the target is scalar. Fail directly in this case.
5600 TODO Understand why class scalar expressions must be excluded. */
5601 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5603 if (sym
->ts
.type
== BT_CLASS
)
5604 gfc_fix_class_refs (e
);
5605 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5607 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5609 /* This can happen because the parser did not detect that the
5610 associate name is an array and the expression had no array
5612 gfc_ref
*ref
= gfc_get_ref ();
5613 ref
->type
= REF_ARRAY
;
5614 ref
->u
.ar
= *gfc_get_array_ref();
5615 ref
->u
.ar
.type
= AR_FULL
;
5618 ref
->u
.ar
.as
= sym
->as
;
5619 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5627 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5628 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5630 /* On the other hand, the parser may not have known this is an array;
5631 in this case, we have to add a FULL reference. */
5632 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5634 e
->ref
= gfc_get_ref ();
5635 e
->ref
->type
= REF_ARRAY
;
5636 e
->ref
->u
.ar
.type
= AR_FULL
;
5637 e
->ref
->u
.ar
.dimen
= 0;
5640 /* Like above, but for class types, where the checking whether an array
5641 ref is present is more complicated. Furthermore make sure not to add
5642 the full array ref to _vptr or _len refs. */
5643 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5644 && CLASS_DATA (sym
)->attr
.dimension
5645 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5647 gfc_ref
*ref
, *newref
;
5649 newref
= gfc_get_ref ();
5650 newref
->type
= REF_ARRAY
;
5651 newref
->u
.ar
.type
= AR_FULL
;
5652 newref
->u
.ar
.dimen
= 0;
5653 /* Because this is an associate var and the first ref either is a ref to
5654 the _data component or not, no traversal of the ref chain is
5655 needed. The array ref needs to be inserted after the _data ref,
5656 or when that is not present, which may happend for polymorphic
5657 types, then at the first position. */
5661 else if (ref
->type
== REF_COMPONENT
5662 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5664 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5666 newref
->next
= ref
->next
;
5670 /* Array ref present already. */
5671 gfc_free_ref_list (newref
);
5673 else if (ref
->type
== REF_ARRAY
)
5674 /* Array ref present already. */
5675 gfc_free_ref_list (newref
);
5683 if (e
->ref
&& !gfc_resolve_ref (e
))
5686 if (sym
->attr
.flavor
== FL_PROCEDURE
5687 && (!sym
->attr
.function
5688 || (sym
->attr
.function
&& sym
->result
5689 && sym
->result
->attr
.proc_pointer
5690 && !sym
->result
->attr
.function
)))
5692 e
->ts
.type
= BT_PROCEDURE
;
5693 goto resolve_procedure
;
5696 if (sym
->ts
.type
!= BT_UNKNOWN
)
5697 gfc_variable_attr (e
, &e
->ts
);
5698 else if (sym
->attr
.flavor
== FL_PROCEDURE
5699 && sym
->attr
.function
&& sym
->result
5700 && sym
->result
->ts
.type
!= BT_UNKNOWN
5701 && sym
->result
->attr
.proc_pointer
)
5702 e
->ts
= sym
->result
->ts
;
5705 /* Must be a simple variable reference. */
5706 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5711 if (check_assumed_size_reference (sym
, e
))
5714 /* Deal with forward references to entries during gfc_resolve_code, to
5715 satisfy, at least partially, 12.5.2.5. */
5716 if (gfc_current_ns
->entries
5717 && current_entry_id
== sym
->entry_id
5720 && cs_base
->current
->op
!= EXEC_ENTRY
)
5722 gfc_entry_list
*entry
;
5723 gfc_formal_arglist
*formal
;
5725 bool seen
, saved_specification_expr
;
5727 /* If the symbol is a dummy... */
5728 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5730 entry
= gfc_current_ns
->entries
;
5733 /* ...test if the symbol is a parameter of previous entries. */
5734 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5735 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5737 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5744 /* If it has not been seen as a dummy, this is an error. */
5747 if (specification_expr
)
5748 gfc_error ("Variable %qs, used in a specification expression"
5749 ", is referenced at %L before the ENTRY statement "
5750 "in which it is a parameter",
5751 sym
->name
, &cs_base
->current
->loc
);
5753 gfc_error ("Variable %qs is used at %L before the ENTRY "
5754 "statement in which it is a parameter",
5755 sym
->name
, &cs_base
->current
->loc
);
5760 /* Now do the same check on the specification expressions. */
5761 saved_specification_expr
= specification_expr
;
5762 specification_expr
= true;
5763 if (sym
->ts
.type
== BT_CHARACTER
5764 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5768 for (n
= 0; n
< sym
->as
->rank
; n
++)
5770 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5772 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5775 specification_expr
= saved_specification_expr
;
5778 /* Update the symbol's entry level. */
5779 sym
->entry_id
= current_entry_id
+ 1;
5782 /* If a symbol has been host_associated mark it. This is used latter,
5783 to identify if aliasing is possible via host association. */
5784 if (sym
->attr
.flavor
== FL_VARIABLE
5785 && gfc_current_ns
->parent
5786 && (gfc_current_ns
->parent
== sym
->ns
5787 || (gfc_current_ns
->parent
->parent
5788 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5789 sym
->attr
.host_assoc
= 1;
5791 if (gfc_current_ns
->proc_name
5792 && sym
->attr
.dimension
5793 && (sym
->ns
!= gfc_current_ns
5794 || sym
->attr
.use_assoc
5795 || sym
->attr
.in_common
))
5796 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5799 if (t
&& !resolve_procedure_expression (e
))
5802 /* F2008, C617 and C1229. */
5803 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5804 && gfc_is_coindexed (e
))
5806 gfc_ref
*ref
, *ref2
= NULL
;
5808 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5810 if (ref
->type
== REF_COMPONENT
)
5812 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5816 for ( ; ref
; ref
= ref
->next
)
5817 if (ref
->type
== REF_COMPONENT
)
5820 /* Expression itself is not coindexed object. */
5821 if (ref
&& e
->ts
.type
== BT_CLASS
)
5823 gfc_error ("Polymorphic subobject of coindexed object at %L",
5828 /* Expression itself is coindexed object. */
5832 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5833 for ( ; c
; c
= c
->next
)
5834 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5836 gfc_error ("Coindexed object with polymorphic allocatable "
5837 "subcomponent at %L", &e
->where
);
5845 gfc_expression_rank (e
);
5847 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5848 add_caf_get_intrinsic (e
);
5850 /* Simplify cases where access to a parameter array results in a
5851 single constant. Suppress errors since those will have been
5852 issued before, as warnings. */
5853 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5855 gfc_push_suppress_errors ();
5856 gfc_simplify_expr (e
, 1);
5857 gfc_pop_suppress_errors ();
5864 /* Checks to see that the correct symbol has been host associated.
5865 The only situation where this arises is that in which a twice
5866 contained function is parsed after the host association is made.
5867 Therefore, on detecting this, change the symbol in the expression
5868 and convert the array reference into an actual arglist if the old
5869 symbol is a variable. */
5871 check_host_association (gfc_expr
*e
)
5873 gfc_symbol
*sym
, *old_sym
;
5877 gfc_actual_arglist
*arg
, *tail
= NULL
;
5878 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5880 /* If the expression is the result of substitution in
5881 interface.c(gfc_extend_expr) because there is no way in
5882 which the host association can be wrong. */
5883 if (e
->symtree
== NULL
5884 || e
->symtree
->n
.sym
== NULL
5885 || e
->user_operator
)
5888 old_sym
= e
->symtree
->n
.sym
;
5890 if (gfc_current_ns
->parent
5891 && old_sym
->ns
!= gfc_current_ns
)
5893 /* Use the 'USE' name so that renamed module symbols are
5894 correctly handled. */
5895 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5897 if (sym
&& old_sym
!= sym
5898 && sym
->ts
.type
== old_sym
->ts
.type
5899 && sym
->attr
.flavor
== FL_PROCEDURE
5900 && sym
->attr
.contained
)
5902 /* Clear the shape, since it might not be valid. */
5903 gfc_free_shape (&e
->shape
, e
->rank
);
5905 /* Give the expression the right symtree! */
5906 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5907 gcc_assert (st
!= NULL
);
5909 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5910 || e
->expr_type
== EXPR_FUNCTION
)
5912 /* Original was function so point to the new symbol, since
5913 the actual argument list is already attached to the
5915 e
->value
.function
.esym
= NULL
;
5920 /* Original was variable so convert array references into
5921 an actual arglist. This does not need any checking now
5922 since resolve_function will take care of it. */
5923 e
->value
.function
.actual
= NULL
;
5924 e
->expr_type
= EXPR_FUNCTION
;
5927 /* Ambiguity will not arise if the array reference is not
5928 the last reference. */
5929 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5930 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5933 gcc_assert (ref
->type
== REF_ARRAY
);
5935 /* Grab the start expressions from the array ref and
5936 copy them into actual arguments. */
5937 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5939 arg
= gfc_get_actual_arglist ();
5940 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5941 if (e
->value
.function
.actual
== NULL
)
5942 tail
= e
->value
.function
.actual
= arg
;
5950 /* Dump the reference list and set the rank. */
5951 gfc_free_ref_list (e
->ref
);
5953 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5956 gfc_resolve_expr (e
);
5960 /* This might have changed! */
5961 return e
->expr_type
== EXPR_FUNCTION
;
5966 gfc_resolve_character_operator (gfc_expr
*e
)
5968 gfc_expr
*op1
= e
->value
.op
.op1
;
5969 gfc_expr
*op2
= e
->value
.op
.op2
;
5970 gfc_expr
*e1
= NULL
;
5971 gfc_expr
*e2
= NULL
;
5973 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5975 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5976 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5977 else if (op1
->expr_type
== EXPR_CONSTANT
)
5978 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5979 op1
->value
.character
.length
);
5981 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5982 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5983 else if (op2
->expr_type
== EXPR_CONSTANT
)
5984 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5985 op2
->value
.character
.length
);
5987 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5997 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5998 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5999 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
6000 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
6001 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
6007 /* Ensure that an character expression has a charlen and, if possible, a
6008 length expression. */
6011 fixup_charlen (gfc_expr
*e
)
6013 /* The cases fall through so that changes in expression type and the need
6014 for multiple fixes are picked up. In all circumstances, a charlen should
6015 be available for the middle end to hang a backend_decl on. */
6016 switch (e
->expr_type
)
6019 gfc_resolve_character_operator (e
);
6023 if (e
->expr_type
== EXPR_ARRAY
)
6024 gfc_resolve_character_array_constructor (e
);
6027 case EXPR_SUBSTRING
:
6028 if (!e
->ts
.u
.cl
&& e
->ref
)
6029 gfc_resolve_substring_charlen (e
);
6034 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6041 /* Update an actual argument to include the passed-object for type-bound
6042 procedures at the right position. */
6044 static gfc_actual_arglist
*
6045 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6048 gcc_assert (argpos
> 0);
6052 gfc_actual_arglist
* result
;
6054 result
= gfc_get_actual_arglist ();
6058 result
->name
= name
;
6064 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6066 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6071 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6074 extract_compcall_passed_object (gfc_expr
* e
)
6078 if (e
->expr_type
== EXPR_UNKNOWN
)
6080 gfc_error ("Error in typebound call at %L",
6085 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6087 if (e
->value
.compcall
.base_object
)
6088 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6091 po
= gfc_get_expr ();
6092 po
->expr_type
= EXPR_VARIABLE
;
6093 po
->symtree
= e
->symtree
;
6094 po
->ref
= gfc_copy_ref (e
->ref
);
6095 po
->where
= e
->where
;
6098 if (!gfc_resolve_expr (po
))
6105 /* Update the arglist of an EXPR_COMPCALL expression to include the
6109 update_compcall_arglist (gfc_expr
* e
)
6112 gfc_typebound_proc
* tbp
;
6114 tbp
= e
->value
.compcall
.tbp
;
6119 po
= extract_compcall_passed_object (e
);
6123 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6129 if (tbp
->pass_arg_num
<= 0)
6132 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6140 /* Extract the passed object from a PPC call (a copy of it). */
6143 extract_ppc_passed_object (gfc_expr
*e
)
6148 po
= gfc_get_expr ();
6149 po
->expr_type
= EXPR_VARIABLE
;
6150 po
->symtree
= e
->symtree
;
6151 po
->ref
= gfc_copy_ref (e
->ref
);
6152 po
->where
= e
->where
;
6154 /* Remove PPC reference. */
6156 while ((*ref
)->next
)
6157 ref
= &(*ref
)->next
;
6158 gfc_free_ref_list (*ref
);
6161 if (!gfc_resolve_expr (po
))
6168 /* Update the actual arglist of a procedure pointer component to include the
6172 update_ppc_arglist (gfc_expr
* e
)
6176 gfc_typebound_proc
* tb
;
6178 ppc
= gfc_get_proc_ptr_comp (e
);
6186 else if (tb
->nopass
)
6189 po
= extract_ppc_passed_object (e
);
6196 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6201 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6203 gfc_error ("Base object for procedure-pointer component call at %L is of"
6204 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6208 gcc_assert (tb
->pass_arg_num
> 0);
6209 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6217 /* Check that the object a TBP is called on is valid, i.e. it must not be
6218 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6221 check_typebound_baseobject (gfc_expr
* e
)
6224 bool return_value
= false;
6226 base
= extract_compcall_passed_object (e
);
6230 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6232 gfc_error ("Error in typebound call at %L", &e
->where
);
6236 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6240 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6242 gfc_error ("Base object for type-bound procedure call at %L is of"
6243 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6247 /* F08:C1230. If the procedure called is NOPASS,
6248 the base object must be scalar. */
6249 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6251 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6252 " be scalar", &e
->where
);
6256 return_value
= true;
6259 gfc_free_expr (base
);
6260 return return_value
;
6264 /* Resolve a call to a type-bound procedure, either function or subroutine,
6265 statically from the data in an EXPR_COMPCALL expression. The adapted
6266 arglist and the target-procedure symtree are returned. */
6269 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6270 gfc_actual_arglist
** actual
)
6272 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6273 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6275 /* Update the actual arglist for PASS. */
6276 if (!update_compcall_arglist (e
))
6279 *actual
= e
->value
.compcall
.actual
;
6280 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6282 gfc_free_ref_list (e
->ref
);
6284 e
->value
.compcall
.actual
= NULL
;
6286 /* If we find a deferred typebound procedure, check for derived types
6287 that an overriding typebound procedure has not been missed. */
6288 if (e
->value
.compcall
.name
6289 && !e
->value
.compcall
.tbp
->non_overridable
6290 && e
->value
.compcall
.base_object
6291 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6294 gfc_symbol
*derived
;
6296 /* Use the derived type of the base_object. */
6297 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6300 /* If necessary, go through the inheritance chain. */
6301 while (!st
&& derived
)
6303 /* Look for the typebound procedure 'name'. */
6304 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6305 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6306 e
->value
.compcall
.name
);
6308 derived
= gfc_get_derived_super_type (derived
);
6311 /* Now find the specific name in the derived type namespace. */
6312 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6313 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6314 derived
->ns
, 1, &st
);
6322 /* Get the ultimate declared type from an expression. In addition,
6323 return the last class/derived type reference and the copy of the
6324 reference list. If check_types is set true, derived types are
6325 identified as well as class references. */
6327 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6328 gfc_expr
*e
, bool check_types
)
6330 gfc_symbol
*declared
;
6337 *new_ref
= gfc_copy_ref (e
->ref
);
6339 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6341 if (ref
->type
!= REF_COMPONENT
)
6344 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6345 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6346 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6348 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6354 if (declared
== NULL
)
6355 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6361 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6362 which of the specific bindings (if any) matches the arglist and transform
6363 the expression into a call of that binding. */
6366 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6368 gfc_typebound_proc
* genproc
;
6369 const char* genname
;
6371 gfc_symbol
*derived
;
6373 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6374 genname
= e
->value
.compcall
.name
;
6375 genproc
= e
->value
.compcall
.tbp
;
6377 if (!genproc
->is_generic
)
6380 /* Try the bindings on this type and in the inheritance hierarchy. */
6381 for (; genproc
; genproc
= genproc
->overridden
)
6385 gcc_assert (genproc
->is_generic
);
6386 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6389 gfc_actual_arglist
* args
;
6392 gcc_assert (g
->specific
);
6394 if (g
->specific
->error
)
6397 target
= g
->specific
->u
.specific
->n
.sym
;
6399 /* Get the right arglist by handling PASS/NOPASS. */
6400 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6401 if (!g
->specific
->nopass
)
6404 po
= extract_compcall_passed_object (e
);
6407 gfc_free_actual_arglist (args
);
6411 gcc_assert (g
->specific
->pass_arg_num
> 0);
6412 gcc_assert (!g
->specific
->error
);
6413 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6414 g
->specific
->pass_arg
);
6416 resolve_actual_arglist (args
, target
->attr
.proc
,
6417 is_external_proc (target
)
6418 && gfc_sym_get_dummy_args (target
) == NULL
);
6420 /* Check if this arglist matches the formal. */
6421 matches
= gfc_arglist_matches_symbol (&args
, target
);
6423 /* Clean up and break out of the loop if we've found it. */
6424 gfc_free_actual_arglist (args
);
6427 e
->value
.compcall
.tbp
= g
->specific
;
6428 genname
= g
->specific_st
->name
;
6429 /* Pass along the name for CLASS methods, where the vtab
6430 procedure pointer component has to be referenced. */
6438 /* Nothing matching found! */
6439 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6440 " %qs at %L", genname
, &e
->where
);
6444 /* Make sure that we have the right specific instance for the name. */
6445 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6447 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6449 e
->value
.compcall
.tbp
= st
->n
.tb
;
6455 /* Resolve a call to a type-bound subroutine. */
6458 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6460 gfc_actual_arglist
* newactual
;
6461 gfc_symtree
* target
;
6463 /* Check that's really a SUBROUTINE. */
6464 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6466 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6467 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6468 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6469 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6470 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6473 gfc_error ("%qs at %L should be a SUBROUTINE",
6474 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6479 if (!check_typebound_baseobject (c
->expr1
))
6482 /* Pass along the name for CLASS methods, where the vtab
6483 procedure pointer component has to be referenced. */
6485 *name
= c
->expr1
->value
.compcall
.name
;
6487 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6490 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6492 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6494 /* Transform into an ordinary EXEC_CALL for now. */
6496 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6499 c
->ext
.actual
= newactual
;
6500 c
->symtree
= target
;
6501 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6503 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6505 gfc_free_expr (c
->expr1
);
6506 c
->expr1
= gfc_get_expr ();
6507 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6508 c
->expr1
->symtree
= target
;
6509 c
->expr1
->where
= c
->loc
;
6511 return resolve_call (c
);
6515 /* Resolve a component-call expression. */
6517 resolve_compcall (gfc_expr
* e
, const char **name
)
6519 gfc_actual_arglist
* newactual
;
6520 gfc_symtree
* target
;
6522 /* Check that's really a FUNCTION. */
6523 if (!e
->value
.compcall
.tbp
->function
)
6525 gfc_error ("%qs at %L should be a FUNCTION",
6526 e
->value
.compcall
.name
, &e
->where
);
6531 /* These must not be assign-calls! */
6532 gcc_assert (!e
->value
.compcall
.assign
);
6534 if (!check_typebound_baseobject (e
))
6537 /* Pass along the name for CLASS methods, where the vtab
6538 procedure pointer component has to be referenced. */
6540 *name
= e
->value
.compcall
.name
;
6542 if (!resolve_typebound_generic_call (e
, name
))
6544 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6546 /* Take the rank from the function's symbol. */
6547 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6548 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6550 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6551 arglist to the TBP's binding target. */
6553 if (!resolve_typebound_static (e
, &target
, &newactual
))
6556 e
->value
.function
.actual
= newactual
;
6557 e
->value
.function
.name
= NULL
;
6558 e
->value
.function
.esym
= target
->n
.sym
;
6559 e
->value
.function
.isym
= NULL
;
6560 e
->symtree
= target
;
6561 e
->ts
= target
->n
.sym
->ts
;
6562 e
->expr_type
= EXPR_FUNCTION
;
6564 /* Resolution is not necessary if this is a class subroutine; this
6565 function only has to identify the specific proc. Resolution of
6566 the call will be done next in resolve_typebound_call. */
6567 return gfc_resolve_expr (e
);
6571 static bool resolve_fl_derived (gfc_symbol
*sym
);
6574 /* Resolve a typebound function, or 'method'. First separate all
6575 the non-CLASS references by calling resolve_compcall directly. */
6578 resolve_typebound_function (gfc_expr
* e
)
6580 gfc_symbol
*declared
;
6592 /* Deal with typebound operators for CLASS objects. */
6593 expr
= e
->value
.compcall
.base_object
;
6594 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6595 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6597 /* Since the typebound operators are generic, we have to ensure
6598 that any delays in resolution are corrected and that the vtab
6601 declared
= ts
.u
.derived
;
6602 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6603 if (c
->ts
.u
.derived
== NULL
)
6604 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6606 if (!resolve_compcall (e
, &name
))
6609 /* Use the generic name if it is there. */
6610 name
= name
? name
: e
->value
.function
.esym
->name
;
6611 e
->symtree
= expr
->symtree
;
6612 e
->ref
= gfc_copy_ref (expr
->ref
);
6613 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6615 /* Trim away the extraneous references that emerge from nested
6616 use of interface.c (extend_expr). */
6617 if (class_ref
&& class_ref
->next
)
6619 gfc_free_ref_list (class_ref
->next
);
6620 class_ref
->next
= NULL
;
6622 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6624 gfc_free_ref_list (e
->ref
);
6628 gfc_add_vptr_component (e
);
6629 gfc_add_component_ref (e
, name
);
6630 e
->value
.function
.esym
= NULL
;
6631 if (expr
->expr_type
!= EXPR_VARIABLE
)
6632 e
->base_expr
= expr
;
6637 return resolve_compcall (e
, NULL
);
6639 if (!gfc_resolve_ref (e
))
6642 /* Get the CLASS declared type. */
6643 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6645 if (!resolve_fl_derived (declared
))
6648 /* Weed out cases of the ultimate component being a derived type. */
6649 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6650 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6652 gfc_free_ref_list (new_ref
);
6653 return resolve_compcall (e
, NULL
);
6656 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6658 /* Treat the call as if it is a typebound procedure, in order to roll
6659 out the correct name for the specific function. */
6660 if (!resolve_compcall (e
, &name
))
6662 gfc_free_ref_list (new_ref
);
6669 /* Convert the expression to a procedure pointer component call. */
6670 e
->value
.function
.esym
= NULL
;
6676 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6677 gfc_add_vptr_component (e
);
6678 gfc_add_component_ref (e
, name
);
6680 /* Recover the typespec for the expression. This is really only
6681 necessary for generic procedures, where the additional call
6682 to gfc_add_component_ref seems to throw the collection of the
6683 correct typespec. */
6687 gfc_free_ref_list (new_ref
);
6692 /* Resolve a typebound subroutine, or 'method'. First separate all
6693 the non-CLASS references by calling resolve_typebound_call
6697 resolve_typebound_subroutine (gfc_code
*code
)
6699 gfc_symbol
*declared
;
6709 st
= code
->expr1
->symtree
;
6711 /* Deal with typebound operators for CLASS objects. */
6712 expr
= code
->expr1
->value
.compcall
.base_object
;
6713 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6714 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6716 /* If the base_object is not a variable, the corresponding actual
6717 argument expression must be stored in e->base_expression so
6718 that the corresponding tree temporary can be used as the base
6719 object in gfc_conv_procedure_call. */
6720 if (expr
->expr_type
!= EXPR_VARIABLE
)
6722 gfc_actual_arglist
*args
;
6724 args
= code
->expr1
->value
.function
.actual
;
6725 for (; args
; args
= args
->next
)
6726 if (expr
== args
->expr
)
6730 /* Since the typebound operators are generic, we have to ensure
6731 that any delays in resolution are corrected and that the vtab
6733 declared
= expr
->ts
.u
.derived
;
6734 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6735 if (c
->ts
.u
.derived
== NULL
)
6736 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6738 if (!resolve_typebound_call (code
, &name
, NULL
))
6741 /* Use the generic name if it is there. */
6742 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6743 code
->expr1
->symtree
= expr
->symtree
;
6744 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6746 /* Trim away the extraneous references that emerge from nested
6747 use of interface.c (extend_expr). */
6748 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6749 if (class_ref
&& class_ref
->next
)
6751 gfc_free_ref_list (class_ref
->next
);
6752 class_ref
->next
= NULL
;
6754 else if (code
->expr1
->ref
&& !class_ref
)
6756 gfc_free_ref_list (code
->expr1
->ref
);
6757 code
->expr1
->ref
= NULL
;
6760 /* Now use the procedure in the vtable. */
6761 gfc_add_vptr_component (code
->expr1
);
6762 gfc_add_component_ref (code
->expr1
, name
);
6763 code
->expr1
->value
.function
.esym
= NULL
;
6764 if (expr
->expr_type
!= EXPR_VARIABLE
)
6765 code
->expr1
->base_expr
= expr
;
6770 return resolve_typebound_call (code
, NULL
, NULL
);
6772 if (!gfc_resolve_ref (code
->expr1
))
6775 /* Get the CLASS declared type. */
6776 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6778 /* Weed out cases of the ultimate component being a derived type. */
6779 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6780 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6782 gfc_free_ref_list (new_ref
);
6783 return resolve_typebound_call (code
, NULL
, NULL
);
6786 if (!resolve_typebound_call (code
, &name
, &overridable
))
6788 gfc_free_ref_list (new_ref
);
6791 ts
= code
->expr1
->ts
;
6795 /* Convert the expression to a procedure pointer component call. */
6796 code
->expr1
->value
.function
.esym
= NULL
;
6797 code
->expr1
->symtree
= st
;
6800 code
->expr1
->ref
= new_ref
;
6802 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6803 gfc_add_vptr_component (code
->expr1
);
6804 gfc_add_component_ref (code
->expr1
, name
);
6806 /* Recover the typespec for the expression. This is really only
6807 necessary for generic procedures, where the additional call
6808 to gfc_add_component_ref seems to throw the collection of the
6809 correct typespec. */
6810 code
->expr1
->ts
= ts
;
6813 gfc_free_ref_list (new_ref
);
6819 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6822 resolve_ppc_call (gfc_code
* c
)
6824 gfc_component
*comp
;
6826 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6827 gcc_assert (comp
!= NULL
);
6829 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6830 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6832 if (!comp
->attr
.subroutine
)
6833 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6835 if (!gfc_resolve_ref (c
->expr1
))
6838 if (!update_ppc_arglist (c
->expr1
))
6841 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6843 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6844 !(comp
->ts
.interface
6845 && comp
->ts
.interface
->formal
)))
6848 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6851 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6857 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6860 resolve_expr_ppc (gfc_expr
* e
)
6862 gfc_component
*comp
;
6864 comp
= gfc_get_proc_ptr_comp (e
);
6865 gcc_assert (comp
!= NULL
);
6867 /* Convert to EXPR_FUNCTION. */
6868 e
->expr_type
= EXPR_FUNCTION
;
6869 e
->value
.function
.isym
= NULL
;
6870 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6872 if (comp
->as
!= NULL
)
6873 e
->rank
= comp
->as
->rank
;
6875 if (!comp
->attr
.function
)
6876 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6878 if (!gfc_resolve_ref (e
))
6881 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6882 !(comp
->ts
.interface
6883 && comp
->ts
.interface
->formal
)))
6886 if (!update_ppc_arglist (e
))
6889 if (!check_pure_function(e
))
6892 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6899 gfc_is_expandable_expr (gfc_expr
*e
)
6901 gfc_constructor
*con
;
6903 if (e
->expr_type
== EXPR_ARRAY
)
6905 /* Traverse the constructor looking for variables that are flavor
6906 parameter. Parameters must be expanded since they are fully used at
6908 con
= gfc_constructor_first (e
->value
.constructor
);
6909 for (; con
; con
= gfc_constructor_next (con
))
6911 if (con
->expr
->expr_type
== EXPR_VARIABLE
6912 && con
->expr
->symtree
6913 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6914 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6916 if (con
->expr
->expr_type
== EXPR_ARRAY
6917 && gfc_is_expandable_expr (con
->expr
))
6926 /* Sometimes variables in specification expressions of the result
6927 of module procedures in submodules wind up not being the 'real'
6928 dummy. Find this, if possible, in the namespace of the first
6932 fixup_unique_dummy (gfc_expr
*e
)
6934 gfc_symtree
*st
= NULL
;
6935 gfc_symbol
*s
= NULL
;
6937 if (e
->symtree
->n
.sym
->ns
->proc_name
6938 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6939 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6942 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6945 && st
->n
.sym
!= NULL
6946 && st
->n
.sym
->attr
.dummy
)
6950 /* Resolve an expression. That is, make sure that types of operands agree
6951 with their operators, intrinsic operators are converted to function calls
6952 for overloaded types and unresolved function references are resolved. */
6955 gfc_resolve_expr (gfc_expr
*e
)
6958 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6960 if (e
== NULL
|| e
->do_not_resolve_again
)
6963 /* inquiry_argument only applies to variables. */
6964 inquiry_save
= inquiry_argument
;
6965 actual_arg_save
= actual_arg
;
6966 first_actual_arg_save
= first_actual_arg
;
6968 if (e
->expr_type
!= EXPR_VARIABLE
)
6970 inquiry_argument
= false;
6972 first_actual_arg
= false;
6974 else if (e
->symtree
!= NULL
6975 && *e
->symtree
->name
== '@'
6976 && e
->symtree
->n
.sym
->attr
.dummy
)
6978 /* Deal with submodule specification expressions that are not
6979 found to be referenced in module.c(read_cleanup). */
6980 fixup_unique_dummy (e
);
6983 switch (e
->expr_type
)
6986 t
= resolve_operator (e
);
6992 if (check_host_association (e
))
6993 t
= resolve_function (e
);
6995 t
= resolve_variable (e
);
6997 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6998 && e
->ref
->type
!= REF_SUBSTRING
)
6999 gfc_resolve_substring_charlen (e
);
7004 t
= resolve_typebound_function (e
);
7007 case EXPR_SUBSTRING
:
7008 t
= gfc_resolve_ref (e
);
7017 t
= resolve_expr_ppc (e
);
7022 if (!gfc_resolve_ref (e
))
7025 t
= gfc_resolve_array_constructor (e
);
7026 /* Also try to expand a constructor. */
7029 gfc_expression_rank (e
);
7030 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7031 gfc_expand_constructor (e
, false);
7034 /* This provides the opportunity for the length of constructors with
7035 character valued function elements to propagate the string length
7036 to the expression. */
7037 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7039 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7040 here rather then add a duplicate test for it above. */
7041 gfc_expand_constructor (e
, false);
7042 t
= gfc_resolve_character_array_constructor (e
);
7047 case EXPR_STRUCTURE
:
7048 t
= gfc_resolve_ref (e
);
7052 t
= resolve_structure_cons (e
, 0);
7056 t
= gfc_simplify_expr (e
, 0);
7060 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7063 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7066 inquiry_argument
= inquiry_save
;
7067 actual_arg
= actual_arg_save
;
7068 first_actual_arg
= first_actual_arg_save
;
7070 /* For some reason, resolving these expressions a second time mangles
7071 the typespec of the expression itself. */
7072 if (t
&& e
->expr_type
== EXPR_VARIABLE
7073 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7074 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7075 e
->do_not_resolve_again
= 1;
7081 /* Resolve an expression from an iterator. They must be scalar and have
7082 INTEGER or (optionally) REAL type. */
7085 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7086 const char *name_msgid
)
7088 if (!gfc_resolve_expr (expr
))
7091 if (expr
->rank
!= 0)
7093 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7097 if (expr
->ts
.type
!= BT_INTEGER
)
7099 if (expr
->ts
.type
== BT_REAL
)
7102 return gfc_notify_std (GFC_STD_F95_DEL
,
7103 "%s at %L must be integer",
7104 _(name_msgid
), &expr
->where
);
7107 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7114 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7122 /* Resolve the expressions in an iterator structure. If REAL_OK is
7123 false allow only INTEGER type iterators, otherwise allow REAL types.
7124 Set own_scope to true for ac-implied-do and data-implied-do as those
7125 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7128 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7130 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7133 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7134 _("iterator variable")))
7137 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7138 "Start expression in DO loop"))
7141 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7142 "End expression in DO loop"))
7145 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7146 "Step expression in DO loop"))
7149 /* Convert start, end, and step to the same type as var. */
7150 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7151 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7152 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7154 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7155 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7156 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7158 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7159 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7160 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7162 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7164 if ((iter
->step
->ts
.type
== BT_INTEGER
7165 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7166 || (iter
->step
->ts
.type
== BT_REAL
7167 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7169 gfc_error ("Step expression in DO loop at %L cannot be zero",
7170 &iter
->step
->where
);
7175 if (iter
->start
->expr_type
== EXPR_CONSTANT
7176 && iter
->end
->expr_type
== EXPR_CONSTANT
7177 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7180 if (iter
->start
->ts
.type
== BT_INTEGER
)
7182 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7183 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7187 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7188 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7190 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7191 gfc_warning (OPT_Wzerotrip
,
7192 "DO loop at %L will be executed zero times",
7193 &iter
->step
->where
);
7196 if (iter
->end
->expr_type
== EXPR_CONSTANT
7197 && iter
->end
->ts
.type
== BT_INTEGER
7198 && iter
->step
->expr_type
== EXPR_CONSTANT
7199 && iter
->step
->ts
.type
== BT_INTEGER
7200 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7201 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7203 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7204 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7206 if (is_step_positive
7207 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7208 gfc_warning (OPT_Wundefined_do_loop
,
7209 "DO loop at %L is undefined as it overflows",
7210 &iter
->step
->where
);
7211 else if (!is_step_positive
7212 && mpz_cmp (iter
->end
->value
.integer
,
7213 gfc_integer_kinds
[k
].min_int
) == 0)
7214 gfc_warning (OPT_Wundefined_do_loop
,
7215 "DO loop at %L is undefined as it underflows",
7216 &iter
->step
->where
);
7223 /* Traversal function for find_forall_index. f == 2 signals that
7224 that variable itself is not to be checked - only the references. */
7227 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7229 if (expr
->expr_type
!= EXPR_VARIABLE
)
7232 /* A scalar assignment */
7233 if (!expr
->ref
|| *f
== 1)
7235 if (expr
->symtree
->n
.sym
== sym
)
7247 /* Check whether the FORALL index appears in the expression or not.
7248 Returns true if SYM is found in EXPR. */
7251 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7253 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7260 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7261 to be a scalar INTEGER variable. The subscripts and stride are scalar
7262 INTEGERs, and if stride is a constant it must be nonzero.
7263 Furthermore "A subscript or stride in a forall-triplet-spec shall
7264 not contain a reference to any index-name in the
7265 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7268 resolve_forall_iterators (gfc_forall_iterator
*it
)
7270 gfc_forall_iterator
*iter
, *iter2
;
7272 for (iter
= it
; iter
; iter
= iter
->next
)
7274 if (gfc_resolve_expr (iter
->var
)
7275 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7276 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7279 if (gfc_resolve_expr (iter
->start
)
7280 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7281 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7282 &iter
->start
->where
);
7283 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7284 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7286 if (gfc_resolve_expr (iter
->end
)
7287 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7288 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7290 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7291 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7293 if (gfc_resolve_expr (iter
->stride
))
7295 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7296 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7297 &iter
->stride
->where
, "INTEGER");
7299 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7300 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7301 gfc_error ("FORALL stride expression at %L cannot be zero",
7302 &iter
->stride
->where
);
7304 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7305 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7308 for (iter
= it
; iter
; iter
= iter
->next
)
7309 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7311 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7312 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7313 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7314 gfc_error ("FORALL index %qs may not appear in triplet "
7315 "specification at %L", iter
->var
->symtree
->name
,
7316 &iter2
->start
->where
);
7321 /* Given a pointer to a symbol that is a derived type, see if it's
7322 inaccessible, i.e. if it's defined in another module and the components are
7323 PRIVATE. The search is recursive if necessary. Returns zero if no
7324 inaccessible components are found, nonzero otherwise. */
7327 derived_inaccessible (gfc_symbol
*sym
)
7331 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7334 for (c
= sym
->components
; c
; c
= c
->next
)
7336 /* Prevent an infinite loop through this function. */
7337 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7338 && sym
== c
->ts
.u
.derived
)
7341 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7349 /* Resolve the argument of a deallocate expression. The expression must be
7350 a pointer or a full array. */
7353 resolve_deallocate_expr (gfc_expr
*e
)
7355 symbol_attribute attr
;
7356 int allocatable
, pointer
;
7362 if (!gfc_resolve_expr (e
))
7365 if (e
->expr_type
!= EXPR_VARIABLE
)
7368 sym
= e
->symtree
->n
.sym
;
7369 unlimited
= UNLIMITED_POLY(sym
);
7371 if (sym
->ts
.type
== BT_CLASS
)
7373 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7374 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7378 allocatable
= sym
->attr
.allocatable
;
7379 pointer
= sym
->attr
.pointer
;
7381 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7386 if (ref
->u
.ar
.type
!= AR_FULL
7387 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7388 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7393 c
= ref
->u
.c
.component
;
7394 if (c
->ts
.type
== BT_CLASS
)
7396 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7397 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7401 allocatable
= c
->attr
.allocatable
;
7402 pointer
= c
->attr
.pointer
;
7413 attr
= gfc_expr_attr (e
);
7415 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7418 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7424 if (gfc_is_coindexed (e
))
7426 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7431 && !gfc_check_vardef_context (e
, true, true, false,
7432 _("DEALLOCATE object")))
7434 if (!gfc_check_vardef_context (e
, false, true, false,
7435 _("DEALLOCATE object")))
7442 /* Returns true if the expression e contains a reference to the symbol sym. */
7444 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7446 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7453 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7455 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7459 /* Given the expression node e for an allocatable/pointer of derived type to be
7460 allocated, get the expression node to be initialized afterwards (needed for
7461 derived types with default initializers, and derived types with allocatable
7462 components that need nullification.) */
7465 gfc_expr_to_initialize (gfc_expr
*e
)
7471 result
= gfc_copy_expr (e
);
7473 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7474 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7475 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7477 if (ref
->u
.ar
.dimen
== 0
7478 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7481 ref
->u
.ar
.type
= AR_FULL
;
7483 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7484 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7489 gfc_free_shape (&result
->shape
, result
->rank
);
7491 /* Recalculate rank, shape, etc. */
7492 gfc_resolve_expr (result
);
7497 /* If the last ref of an expression is an array ref, return a copy of the
7498 expression with that one removed. Otherwise, a copy of the original
7499 expression. This is used for allocate-expressions and pointer assignment
7500 LHS, where there may be an array specification that needs to be stripped
7501 off when using gfc_check_vardef_context. */
7504 remove_last_array_ref (gfc_expr
* e
)
7509 e2
= gfc_copy_expr (e
);
7510 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7511 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7513 gfc_free_ref_list (*r
);
7522 /* Used in resolve_allocate_expr to check that a allocation-object and
7523 a source-expr are conformable. This does not catch all possible
7524 cases; in particular a runtime checking is needed. */
7527 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7530 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7532 /* First compare rank. */
7533 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7534 || (!tail
&& e1
->rank
!= e2
->rank
))
7536 gfc_error ("Source-expr at %L must be scalar or have the "
7537 "same rank as the allocate-object at %L",
7538 &e1
->where
, &e2
->where
);
7549 for (i
= 0; i
< e1
->rank
; i
++)
7551 if (tail
->u
.ar
.start
[i
] == NULL
)
7554 if (tail
->u
.ar
.end
[i
])
7556 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7557 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7558 mpz_add_ui (s
, s
, 1);
7562 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7565 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7567 gfc_error ("Source-expr at %L and allocate-object at %L must "
7568 "have the same shape", &e1
->where
, &e2
->where
);
7581 /* Resolve the expression in an ALLOCATE statement, doing the additional
7582 checks to see whether the expression is OK or not. The expression must
7583 have a trailing array reference that gives the size of the array. */
7586 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7588 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7592 symbol_attribute attr
;
7593 gfc_ref
*ref
, *ref2
;
7596 gfc_symbol
*sym
= NULL
;
7601 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7602 checking of coarrays. */
7603 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7604 if (ref
->next
== NULL
)
7607 if (ref
&& ref
->type
== REF_ARRAY
)
7608 ref
->u
.ar
.in_allocate
= true;
7610 if (!gfc_resolve_expr (e
))
7613 /* Make sure the expression is allocatable or a pointer. If it is
7614 pointer, the next-to-last reference must be a pointer. */
7618 sym
= e
->symtree
->n
.sym
;
7620 /* Check whether ultimate component is abstract and CLASS. */
7623 /* Is the allocate-object unlimited polymorphic? */
7624 unlimited
= UNLIMITED_POLY(e
);
7626 if (e
->expr_type
!= EXPR_VARIABLE
)
7629 attr
= gfc_expr_attr (e
);
7630 pointer
= attr
.pointer
;
7631 dimension
= attr
.dimension
;
7632 codimension
= attr
.codimension
;
7636 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7638 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7639 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7640 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7641 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7642 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7646 allocatable
= sym
->attr
.allocatable
;
7647 pointer
= sym
->attr
.pointer
;
7648 dimension
= sym
->attr
.dimension
;
7649 codimension
= sym
->attr
.codimension
;
7654 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7659 if (ref
->u
.ar
.codimen
> 0)
7662 for (n
= ref
->u
.ar
.dimen
;
7663 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7664 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7671 if (ref
->next
!= NULL
)
7679 gfc_error ("Coindexed allocatable object at %L",
7684 c
= ref
->u
.c
.component
;
7685 if (c
->ts
.type
== BT_CLASS
)
7687 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7688 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7689 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7690 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7691 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7695 allocatable
= c
->attr
.allocatable
;
7696 pointer
= c
->attr
.pointer
;
7697 dimension
= c
->attr
.dimension
;
7698 codimension
= c
->attr
.codimension
;
7699 is_abstract
= c
->attr
.abstract
;
7712 /* Check for F08:C628. */
7713 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7715 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7720 /* Some checks for the SOURCE tag. */
7723 /* Check F03:C631. */
7724 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7726 gfc_error ("Type of entity at %L is type incompatible with "
7727 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7731 /* Check F03:C632 and restriction following Note 6.18. */
7732 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7735 /* Check F03:C633. */
7736 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7738 gfc_error ("The allocate-object at %L and the source-expr at %L "
7739 "shall have the same kind type parameter",
7740 &e
->where
, &code
->expr3
->where
);
7744 /* Check F2008, C642. */
7745 if (code
->expr3
->ts
.type
== BT_DERIVED
7746 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7747 || (code
->expr3
->ts
.u
.derived
->from_intmod
7748 == INTMOD_ISO_FORTRAN_ENV
7749 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7750 == ISOFORTRAN_LOCK_TYPE
)))
7752 gfc_error ("The source-expr at %L shall neither be of type "
7753 "LOCK_TYPE nor have a LOCK_TYPE component if "
7754 "allocate-object at %L is a coarray",
7755 &code
->expr3
->where
, &e
->where
);
7759 /* Check TS18508, C702/C703. */
7760 if (code
->expr3
->ts
.type
== BT_DERIVED
7761 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7762 || (code
->expr3
->ts
.u
.derived
->from_intmod
7763 == INTMOD_ISO_FORTRAN_ENV
7764 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7765 == ISOFORTRAN_EVENT_TYPE
)))
7767 gfc_error ("The source-expr at %L shall neither be of type "
7768 "EVENT_TYPE nor have a EVENT_TYPE component if "
7769 "allocate-object at %L is a coarray",
7770 &code
->expr3
->where
, &e
->where
);
7775 /* Check F08:C629. */
7776 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7779 gcc_assert (e
->ts
.type
== BT_CLASS
);
7780 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7781 "type-spec or source-expr", sym
->name
, &e
->where
);
7785 /* Check F08:C632. */
7786 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7787 && !UNLIMITED_POLY (e
))
7791 if (!e
->ts
.u
.cl
->length
)
7794 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7795 code
->ext
.alloc
.ts
.u
.cl
->length
);
7796 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7798 gfc_error ("Allocating %s at %L with type-spec requires the same "
7799 "character-length parameter as in the declaration",
7800 sym
->name
, &e
->where
);
7805 /* In the variable definition context checks, gfc_expr_attr is used
7806 on the expression. This is fooled by the array specification
7807 present in e, thus we have to eliminate that one temporarily. */
7808 e2
= remove_last_array_ref (e
);
7811 t
= gfc_check_vardef_context (e2
, true, true, false,
7812 _("ALLOCATE object"));
7814 t
= gfc_check_vardef_context (e2
, false, true, false,
7815 _("ALLOCATE object"));
7820 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7821 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7823 /* For class arrays, the initialization with SOURCE is done
7824 using _copy and trans_call. It is convenient to exploit that
7825 when the allocated type is different from the declared type but
7826 no SOURCE exists by setting expr3. */
7827 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7829 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7830 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7831 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7833 /* We have to zero initialize the integer variable. */
7834 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7837 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7839 /* Make sure the vtab symbol is present when
7840 the module variables are generated. */
7841 gfc_typespec ts
= e
->ts
;
7843 ts
= code
->expr3
->ts
;
7844 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7845 ts
= code
->ext
.alloc
.ts
;
7847 /* Finding the vtab also publishes the type's symbol. Therefore this
7848 statement is necessary. */
7849 gfc_find_derived_vtab (ts
.u
.derived
);
7851 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7853 /* Again, make sure the vtab symbol is present when
7854 the module variables are generated. */
7855 gfc_typespec
*ts
= NULL
;
7857 ts
= &code
->expr3
->ts
;
7859 ts
= &code
->ext
.alloc
.ts
;
7863 /* Finding the vtab also publishes the type's symbol. Therefore this
7864 statement is necessary. */
7868 if (dimension
== 0 && codimension
== 0)
7871 /* Make sure the last reference node is an array specification. */
7873 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7874 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7879 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7880 "in ALLOCATE statement at %L", &e
->where
))
7882 if (code
->expr3
->rank
!= 0)
7883 *array_alloc_wo_spec
= true;
7886 gfc_error ("Array specification or array-valued SOURCE= "
7887 "expression required in ALLOCATE statement at %L",
7894 gfc_error ("Array specification required in ALLOCATE statement "
7895 "at %L", &e
->where
);
7900 /* Make sure that the array section reference makes sense in the
7901 context of an ALLOCATE specification. */
7906 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7908 switch (ar
->dimen_type
[i
])
7910 case DIMEN_THIS_IMAGE
:
7911 gfc_error ("Coarray specification required in ALLOCATE statement "
7912 "at %L", &e
->where
);
7916 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7918 /* If ar->stride[i] is NULL, we issued a previous error. */
7919 if (ar
->stride
[i
] == NULL
)
7920 gfc_error ("Bad array specification in ALLOCATE statement "
7921 "at %L", &e
->where
);
7924 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7926 gfc_error ("Upper cobound is less than lower cobound at %L",
7927 &ar
->start
[i
]->where
);
7933 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7935 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7936 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7938 gfc_error ("Upper cobound is less than lower cobound "
7939 "of 1 at %L", &ar
->start
[i
]->where
);
7949 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7955 for (i
= 0; i
< ar
->dimen
; i
++)
7957 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7960 switch (ar
->dimen_type
[i
])
7966 if (ar
->start
[i
] != NULL
7967 && ar
->end
[i
] != NULL
7968 && ar
->stride
[i
] == NULL
)
7976 case DIMEN_THIS_IMAGE
:
7977 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7983 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7985 sym
= a
->expr
->symtree
->n
.sym
;
7987 /* TODO - check derived type components. */
7988 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7991 if ((ar
->start
[i
] != NULL
7992 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7993 || (ar
->end
[i
] != NULL
7994 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7996 gfc_error ("%qs must not appear in the array specification at "
7997 "%L in the same ALLOCATE statement where it is "
7998 "itself allocated", sym
->name
, &ar
->where
);
8004 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
8006 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
8007 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
8009 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
8011 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
8012 "statement at %L", &e
->where
);
8018 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
8019 && ar
->stride
[i
] == NULL
)
8022 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8036 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8038 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8039 gfc_alloc
*a
, *p
, *q
;
8042 errmsg
= code
->expr2
;
8044 /* Check the stat variable. */
8047 gfc_check_vardef_context (stat
, false, false, false,
8048 _("STAT variable"));
8050 if ((stat
->ts
.type
!= BT_INTEGER
8051 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8052 || stat
->ref
->type
== REF_COMPONENT
)))
8054 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8055 "variable", &stat
->where
);
8057 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8058 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8060 gfc_ref
*ref1
, *ref2
;
8063 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8064 ref1
= ref1
->next
, ref2
= ref2
->next
)
8066 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8068 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8077 gfc_error ("Stat-variable at %L shall not be %sd within "
8078 "the same %s statement", &stat
->where
, fcn
, fcn
);
8084 /* Check the errmsg variable. */
8088 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8091 gfc_check_vardef_context (errmsg
, false, false, false,
8092 _("ERRMSG variable"));
8094 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8095 F18:R930 errmsg-variable is scalar-default-char-variable
8096 F18:R906 default-char-variable is variable
8097 F18:C906 default-char-variable shall be default character. */
8098 if ((errmsg
->ts
.type
!= BT_CHARACTER
8100 && (errmsg
->ref
->type
== REF_ARRAY
8101 || errmsg
->ref
->type
== REF_COMPONENT
)))
8103 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8104 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8105 "variable", &errmsg
->where
);
8107 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8108 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8110 gfc_ref
*ref1
, *ref2
;
8113 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8114 ref1
= ref1
->next
, ref2
= ref2
->next
)
8116 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8118 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8127 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8128 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8134 /* Check that an allocate-object appears only once in the statement. */
8136 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8139 for (q
= p
->next
; q
; q
= q
->next
)
8142 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8144 /* This is a potential collision. */
8145 gfc_ref
*pr
= pe
->ref
;
8146 gfc_ref
*qr
= qe
->ref
;
8148 /* Follow the references until
8149 a) They start to differ, in which case there is no error;
8150 you can deallocate a%b and a%c in a single statement
8151 b) Both of them stop, which is an error
8152 c) One of them stops, which is also an error. */
8155 if (pr
== NULL
&& qr
== NULL
)
8157 gfc_error ("Allocate-object at %L also appears at %L",
8158 &pe
->where
, &qe
->where
);
8161 else if (pr
!= NULL
&& qr
== NULL
)
8163 gfc_error ("Allocate-object at %L is subobject of"
8164 " object at %L", &pe
->where
, &qe
->where
);
8167 else if (pr
== NULL
&& qr
!= NULL
)
8169 gfc_error ("Allocate-object at %L is subobject of"
8170 " object at %L", &qe
->where
, &pe
->where
);
8173 /* Here, pr != NULL && qr != NULL */
8174 gcc_assert(pr
->type
== qr
->type
);
8175 if (pr
->type
== REF_ARRAY
)
8177 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8179 gcc_assert (qr
->type
== REF_ARRAY
);
8181 if (pr
->next
&& qr
->next
)
8184 gfc_array_ref
*par
= &(pr
->u
.ar
);
8185 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8187 for (i
=0; i
<par
->dimen
; i
++)
8189 if ((par
->start
[i
] != NULL
8190 || qar
->start
[i
] != NULL
)
8191 && gfc_dep_compare_expr (par
->start
[i
],
8192 qar
->start
[i
]) != 0)
8199 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8212 if (strcmp (fcn
, "ALLOCATE") == 0)
8214 bool arr_alloc_wo_spec
= false;
8216 /* Resolving the expr3 in the loop over all objects to allocate would
8217 execute loop invariant code for each loop item. Therefore do it just
8219 if (code
->expr3
&& code
->expr3
->mold
8220 && code
->expr3
->ts
.type
== BT_DERIVED
)
8222 /* Default initialization via MOLD (non-polymorphic). */
8223 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8226 gfc_resolve_expr (rhs
);
8227 gfc_free_expr (code
->expr3
);
8231 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8232 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8234 if (arr_alloc_wo_spec
&& code
->expr3
)
8236 /* Mark the allocate to have to take the array specification
8238 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8243 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8244 resolve_deallocate_expr (a
->expr
);
8249 /************ SELECT CASE resolution subroutines ************/
8251 /* Callback function for our mergesort variant. Determines interval
8252 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8253 op1 > op2. Assumes we're not dealing with the default case.
8254 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8255 There are nine situations to check. */
8258 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8262 if (op1
->low
== NULL
) /* op1 = (:L) */
8264 /* op2 = (:N), so overlap. */
8266 /* op2 = (M:) or (M:N), L < M */
8267 if (op2
->low
!= NULL
8268 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8271 else if (op1
->high
== NULL
) /* op1 = (K:) */
8273 /* op2 = (M:), so overlap. */
8275 /* op2 = (:N) or (M:N), K > N */
8276 if (op2
->high
!= NULL
8277 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8280 else /* op1 = (K:L) */
8282 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8283 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8285 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8286 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8288 else /* op2 = (M:N) */
8292 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8295 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8304 /* Merge-sort a double linked case list, detecting overlap in the
8305 process. LIST is the head of the double linked case list before it
8306 is sorted. Returns the head of the sorted list if we don't see any
8307 overlap, or NULL otherwise. */
8310 check_case_overlap (gfc_case
*list
)
8312 gfc_case
*p
, *q
, *e
, *tail
;
8313 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8315 /* If the passed list was empty, return immediately. */
8322 /* Loop unconditionally. The only exit from this loop is a return
8323 statement, when we've finished sorting the case list. */
8330 /* Count the number of merges we do in this pass. */
8333 /* Loop while there exists a merge to be done. */
8338 /* Count this merge. */
8341 /* Cut the list in two pieces by stepping INSIZE places
8342 forward in the list, starting from P. */
8345 for (i
= 0; i
< insize
; i
++)
8354 /* Now we have two lists. Merge them! */
8355 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8357 /* See from which the next case to merge comes from. */
8360 /* P is empty so the next case must come from Q. */
8365 else if (qsize
== 0 || q
== NULL
)
8374 cmp
= compare_cases (p
, q
);
8377 /* The whole case range for P is less than the
8385 /* The whole case range for Q is greater than
8386 the case range for P. */
8393 /* The cases overlap, or they are the same
8394 element in the list. Either way, we must
8395 issue an error and get the next case from P. */
8396 /* FIXME: Sort P and Q by line number. */
8397 gfc_error ("CASE label at %L overlaps with CASE "
8398 "label at %L", &p
->where
, &q
->where
);
8406 /* Add the next element to the merged list. */
8415 /* P has now stepped INSIZE places along, and so has Q. So
8416 they're the same. */
8421 /* If we have done only one merge or none at all, we've
8422 finished sorting the cases. */
8431 /* Otherwise repeat, merging lists twice the size. */
8437 /* Check to see if an expression is suitable for use in a CASE statement.
8438 Makes sure that all case expressions are scalar constants of the same
8439 type. Return false if anything is wrong. */
8442 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8444 if (e
== NULL
) return true;
8446 if (e
->ts
.type
!= case_expr
->ts
.type
)
8448 gfc_error ("Expression in CASE statement at %L must be of type %s",
8449 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8453 /* C805 (R808) For a given case-construct, each case-value shall be of
8454 the same type as case-expr. For character type, length differences
8455 are allowed, but the kind type parameters shall be the same. */
8457 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8459 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8460 &e
->where
, case_expr
->ts
.kind
);
8464 /* Convert the case value kind to that of case expression kind,
8467 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8468 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8472 gfc_error ("Expression in CASE statement at %L must be scalar",
8481 /* Given a completely parsed select statement, we:
8483 - Validate all expressions and code within the SELECT.
8484 - Make sure that the selection expression is not of the wrong type.
8485 - Make sure that no case ranges overlap.
8486 - Eliminate unreachable cases and unreachable code resulting from
8487 removing case labels.
8489 The standard does allow unreachable cases, e.g. CASE (5:3). But
8490 they are a hassle for code generation, and to prevent that, we just
8491 cut them out here. This is not necessary for overlapping cases
8492 because they are illegal and we never even try to generate code.
8494 We have the additional caveat that a SELECT construct could have
8495 been a computed GOTO in the source code. Fortunately we can fairly
8496 easily work around that here: The case_expr for a "real" SELECT CASE
8497 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8498 we have to do is make sure that the case_expr is a scalar integer
8502 resolve_select (gfc_code
*code
, bool select_type
)
8505 gfc_expr
*case_expr
;
8506 gfc_case
*cp
, *default_case
, *tail
, *head
;
8507 int seen_unreachable
;
8513 if (code
->expr1
== NULL
)
8515 /* This was actually a computed GOTO statement. */
8516 case_expr
= code
->expr2
;
8517 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8518 gfc_error ("Selection expression in computed GOTO statement "
8519 "at %L must be a scalar integer expression",
8522 /* Further checking is not necessary because this SELECT was built
8523 by the compiler, so it should always be OK. Just move the
8524 case_expr from expr2 to expr so that we can handle computed
8525 GOTOs as normal SELECTs from here on. */
8526 code
->expr1
= code
->expr2
;
8531 case_expr
= code
->expr1
;
8532 type
= case_expr
->ts
.type
;
8535 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8537 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8538 &case_expr
->where
, gfc_typename (case_expr
));
8540 /* Punt. Going on here just produce more garbage error messages. */
8545 if (!select_type
&& case_expr
->rank
!= 0)
8547 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8548 "expression", &case_expr
->where
);
8554 /* Raise a warning if an INTEGER case value exceeds the range of
8555 the case-expr. Later, all expressions will be promoted to the
8556 largest kind of all case-labels. */
8558 if (type
== BT_INTEGER
)
8559 for (body
= code
->block
; body
; body
= body
->block
)
8560 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8563 && gfc_check_integer_range (cp
->low
->value
.integer
,
8564 case_expr
->ts
.kind
) != ARITH_OK
)
8565 gfc_warning (0, "Expression in CASE statement at %L is "
8566 "not in the range of %s", &cp
->low
->where
,
8567 gfc_typename (case_expr
));
8570 && cp
->low
!= cp
->high
8571 && gfc_check_integer_range (cp
->high
->value
.integer
,
8572 case_expr
->ts
.kind
) != ARITH_OK
)
8573 gfc_warning (0, "Expression in CASE statement at %L is "
8574 "not in the range of %s", &cp
->high
->where
,
8575 gfc_typename (case_expr
));
8578 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8579 of the SELECT CASE expression and its CASE values. Walk the lists
8580 of case values, and if we find a mismatch, promote case_expr to
8581 the appropriate kind. */
8583 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8585 for (body
= code
->block
; body
; body
= body
->block
)
8587 /* Walk the case label list. */
8588 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8590 /* Intercept the DEFAULT case. It does not have a kind. */
8591 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8594 /* Unreachable case ranges are discarded, so ignore. */
8595 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8596 && cp
->low
!= cp
->high
8597 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8601 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8602 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8604 if (cp
->high
!= NULL
8605 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8606 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8611 /* Assume there is no DEFAULT case. */
8612 default_case
= NULL
;
8617 for (body
= code
->block
; body
; body
= body
->block
)
8619 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8621 seen_unreachable
= 0;
8623 /* Walk the case label list, making sure that all case labels
8625 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8627 /* Count the number of cases in the whole construct. */
8630 /* Intercept the DEFAULT case. */
8631 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8633 if (default_case
!= NULL
)
8635 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8636 "by a second DEFAULT CASE at %L",
8637 &default_case
->where
, &cp
->where
);
8648 /* Deal with single value cases and case ranges. Errors are
8649 issued from the validation function. */
8650 if (!validate_case_label_expr (cp
->low
, case_expr
)
8651 || !validate_case_label_expr (cp
->high
, case_expr
))
8657 if (type
== BT_LOGICAL
8658 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8659 || cp
->low
!= cp
->high
))
8661 gfc_error ("Logical range in CASE statement at %L is not "
8662 "allowed", &cp
->low
->where
);
8667 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8670 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8671 if (value
& seen_logical
)
8673 gfc_error ("Constant logical value in CASE statement "
8674 "is repeated at %L",
8679 seen_logical
|= value
;
8682 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8683 && cp
->low
!= cp
->high
8684 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8686 if (warn_surprising
)
8687 gfc_warning (OPT_Wsurprising
,
8688 "Range specification at %L can never be matched",
8691 cp
->unreachable
= 1;
8692 seen_unreachable
= 1;
8696 /* If the case range can be matched, it can also overlap with
8697 other cases. To make sure it does not, we put it in a
8698 double linked list here. We sort that with a merge sort
8699 later on to detect any overlapping cases. */
8703 head
->right
= head
->left
= NULL
;
8708 tail
->right
->left
= tail
;
8715 /* It there was a failure in the previous case label, give up
8716 for this case label list. Continue with the next block. */
8720 /* See if any case labels that are unreachable have been seen.
8721 If so, we eliminate them. This is a bit of a kludge because
8722 the case lists for a single case statement (label) is a
8723 single forward linked lists. */
8724 if (seen_unreachable
)
8726 /* Advance until the first case in the list is reachable. */
8727 while (body
->ext
.block
.case_list
!= NULL
8728 && body
->ext
.block
.case_list
->unreachable
)
8730 gfc_case
*n
= body
->ext
.block
.case_list
;
8731 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8733 gfc_free_case_list (n
);
8736 /* Strip all other unreachable cases. */
8737 if (body
->ext
.block
.case_list
)
8739 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8741 if (cp
->next
->unreachable
)
8743 gfc_case
*n
= cp
->next
;
8744 cp
->next
= cp
->next
->next
;
8746 gfc_free_case_list (n
);
8753 /* See if there were overlapping cases. If the check returns NULL,
8754 there was overlap. In that case we don't do anything. If head
8755 is non-NULL, we prepend the DEFAULT case. The sorted list can
8756 then used during code generation for SELECT CASE constructs with
8757 a case expression of a CHARACTER type. */
8760 head
= check_case_overlap (head
);
8762 /* Prepend the default_case if it is there. */
8763 if (head
!= NULL
&& default_case
)
8765 default_case
->left
= NULL
;
8766 default_case
->right
= head
;
8767 head
->left
= default_case
;
8771 /* Eliminate dead blocks that may be the result if we've seen
8772 unreachable case labels for a block. */
8773 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8775 if (body
->block
->ext
.block
.case_list
== NULL
)
8777 /* Cut the unreachable block from the code chain. */
8778 gfc_code
*c
= body
->block
;
8779 body
->block
= c
->block
;
8781 /* Kill the dead block, but not the blocks below it. */
8783 gfc_free_statements (c
);
8787 /* More than two cases is legal but insane for logical selects.
8788 Issue a warning for it. */
8789 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8790 gfc_warning (OPT_Wsurprising
,
8791 "Logical SELECT CASE block at %L has more that two cases",
8796 /* Check if a derived type is extensible. */
8799 gfc_type_is_extensible (gfc_symbol
*sym
)
8801 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8802 || (sym
->attr
.is_class
8803 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8808 resolve_types (gfc_namespace
*ns
);
8810 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8811 correct as well as possibly the array-spec. */
8814 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8818 gcc_assert (sym
->assoc
);
8819 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8821 /* If this is for SELECT TYPE, the target may not yet be set. In that
8822 case, return. Resolution will be called later manually again when
8824 target
= sym
->assoc
->target
;
8827 gcc_assert (!sym
->assoc
->dangling
);
8829 if (resolve_target
&& !gfc_resolve_expr (target
))
8832 /* For variable targets, we get some attributes from the target. */
8833 if (target
->expr_type
== EXPR_VARIABLE
)
8837 gcc_assert (target
->symtree
);
8838 tsym
= target
->symtree
->n
.sym
;
8839 if (tsym
->attr
.flavor
== FL_PROGRAM
)
8841 gfc_error ("Associating entity %qs at %L is a PROGRAM",
8842 tsym
->name
, &target
->where
);
8846 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8847 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8849 sym
->attr
.target
= tsym
->attr
.target
8850 || gfc_expr_attr (target
).pointer
;
8851 if (is_subref_array (target
))
8852 sym
->attr
.subref_array_pointer
= 1;
8855 if (target
->expr_type
== EXPR_NULL
)
8857 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8860 else if (target
->ts
.type
== BT_UNKNOWN
)
8862 gfc_error ("Selector at %L has no type", &target
->where
);
8866 /* Get type if this was not already set. Note that it can be
8867 some other type than the target in case this is a SELECT TYPE
8868 selector! So we must not update when the type is already there. */
8869 if (sym
->ts
.type
== BT_UNKNOWN
)
8870 sym
->ts
= target
->ts
;
8872 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8874 /* See if this is a valid association-to-variable. */
8875 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8876 && !gfc_has_vector_subscript (target
));
8878 /* Finally resolve if this is an array or not. */
8879 if (sym
->attr
.dimension
&& target
->rank
== 0)
8881 /* primary.c makes the assumption that a reference to an associate
8882 name followed by a left parenthesis is an array reference. */
8883 if (sym
->ts
.type
!= BT_CHARACTER
)
8884 gfc_error ("Associate-name %qs at %L is used as array",
8885 sym
->name
, &sym
->declared_at
);
8886 sym
->attr
.dimension
= 0;
8891 /* We cannot deal with class selectors that need temporaries. */
8892 if (target
->ts
.type
== BT_CLASS
8893 && gfc_ref_needs_temporary_p (target
->ref
))
8895 gfc_error ("CLASS selector at %L needs a temporary which is not "
8896 "yet implemented", &target
->where
);
8900 if (target
->ts
.type
== BT_CLASS
)
8901 gfc_fix_class_refs (target
);
8903 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8906 /* The rank may be incorrectly guessed at parsing, therefore make sure
8907 it is corrected now. */
8908 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8911 sym
->as
= gfc_get_array_spec ();
8913 as
->rank
= target
->rank
;
8914 as
->type
= AS_DEFERRED
;
8915 as
->corank
= gfc_get_corank (target
);
8916 sym
->attr
.dimension
= 1;
8917 if (as
->corank
!= 0)
8918 sym
->attr
.codimension
= 1;
8920 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8922 if (!CLASS_DATA (sym
)->as
)
8923 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8924 as
= CLASS_DATA (sym
)->as
;
8925 as
->rank
= target
->rank
;
8926 as
->type
= AS_DEFERRED
;
8927 as
->corank
= gfc_get_corank (target
);
8928 CLASS_DATA (sym
)->attr
.dimension
= 1;
8929 if (as
->corank
!= 0)
8930 CLASS_DATA (sym
)->attr
.codimension
= 1;
8933 else if (!sym
->attr
.select_rank_temporary
)
8935 /* target's rank is 0, but the type of the sym is still array valued,
8936 which has to be corrected. */
8937 if (sym
->ts
.type
== BT_CLASS
8938 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8941 symbol_attribute attr
;
8942 /* The associated variable's type is still the array type
8943 correct this now. */
8944 gfc_typespec
*ts
= &target
->ts
;
8947 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8952 ts
= &ref
->u
.c
.component
->ts
;
8955 if (ts
->type
== BT_CLASS
)
8956 ts
= &ts
->u
.derived
->components
->ts
;
8962 /* Create a scalar instance of the current class type. Because the
8963 rank of a class array goes into its name, the type has to be
8964 rebuild. The alternative of (re-)setting just the attributes
8965 and as in the current type, destroys the type also in other
8969 sym
->ts
.type
= BT_CLASS
;
8970 attr
= CLASS_DATA (sym
)->attr
;
8972 attr
.associate_var
= 1;
8973 attr
.dimension
= attr
.codimension
= 0;
8974 attr
.class_pointer
= 1;
8975 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8977 /* Make sure the _vptr is set. */
8978 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8979 if (c
->ts
.u
.derived
== NULL
)
8980 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8981 CLASS_DATA (sym
)->attr
.pointer
= 1;
8982 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8983 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8984 gfc_commit_symbol (sym
->ts
.u
.derived
);
8985 /* _vptr now has the _vtab in it, change it to the _vtype. */
8986 if (c
->ts
.u
.derived
->attr
.vtab
)
8987 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8988 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8989 resolve_types (c
->ts
.u
.derived
->ns
);
8993 /* Mark this as an associate variable. */
8994 sym
->attr
.associate_var
= 1;
8996 /* Fix up the type-spec for CHARACTER types. */
8997 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9000 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9002 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9003 && target
->symtree
->n
.sym
->attr
.dummy
9004 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9006 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9007 sym
->ts
.deferred
= 1;
9010 if (!sym
->ts
.u
.cl
->length
9011 && !sym
->ts
.deferred
9012 && target
->expr_type
== EXPR_CONSTANT
)
9014 sym
->ts
.u
.cl
->length
=
9015 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9016 target
->value
.character
.length
);
9018 else if ((!sym
->ts
.u
.cl
->length
9019 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9020 && target
->expr_type
!= EXPR_VARIABLE
)
9022 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9023 sym
->ts
.deferred
= 1;
9025 /* This is reset in trans-stmt.c after the assignment
9026 of the target expression to the associate name. */
9027 sym
->attr
.allocatable
= 1;
9031 /* If the target is a good class object, so is the associate variable. */
9032 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9033 sym
->attr
.class_ok
= 1;
9037 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9038 array reference, where necessary. The symbols are artificial and so
9039 the dimension attribute and arrayspec can also be set. In addition,
9040 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9041 This is corrected here as well.*/
9044 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9045 int rank
, gfc_ref
*ref
)
9047 gfc_ref
*nref
= (*expr1
)->ref
;
9048 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9049 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9050 (*expr1
)->rank
= rank
;
9051 if (sym1
->ts
.type
== BT_CLASS
)
9053 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9054 (*expr1
)->ts
= sym1
->ts
;
9056 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9057 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9058 CLASS_DATA (sym1
)->as
9059 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9063 sym1
->attr
.dimension
= 1;
9064 if (sym1
->as
== NULL
&& sym2
)
9065 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9068 for (; nref
; nref
= nref
->next
)
9069 if (nref
->next
== NULL
)
9072 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9073 nref
->next
= gfc_copy_ref (ref
);
9074 else if (ref
&& !nref
)
9075 (*expr1
)->ref
= gfc_copy_ref (ref
);
9080 build_loc_call (gfc_expr
*sym_expr
)
9083 loc_call
= gfc_get_expr ();
9084 loc_call
->expr_type
= EXPR_FUNCTION
;
9085 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9086 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9087 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9088 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9089 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9090 loc_call
->ts
.type
= BT_INTEGER
;
9091 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9092 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9093 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9094 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9095 loc_call
->where
= sym_expr
->where
;
9099 /* Resolve a SELECT TYPE statement. */
9102 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9104 gfc_symbol
*selector_type
;
9105 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9106 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9109 char name
[GFC_MAX_SYMBOL_LEN
];
9113 gfc_ref
* ref
= NULL
;
9114 gfc_expr
*selector_expr
= NULL
;
9116 ns
= code
->ext
.block
.ns
;
9119 /* Check for F03:C813. */
9120 if (code
->expr1
->ts
.type
!= BT_CLASS
9121 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9123 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9124 "at %L", &code
->loc
);
9128 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9133 gfc_ref
*ref2
= NULL
;
9134 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9135 if (ref
->type
== REF_COMPONENT
9136 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9141 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9142 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9143 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9147 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9148 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9149 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9152 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9153 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9155 /* F2008: C803 The selector expression must not be coindexed. */
9156 if (gfc_is_coindexed (code
->expr2
))
9158 gfc_error ("Selector at %L must not be coindexed",
9159 &code
->expr2
->where
);
9166 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9168 if (gfc_is_coindexed (code
->expr1
))
9170 gfc_error ("Selector at %L must not be coindexed",
9171 &code
->expr1
->where
);
9176 /* Loop over TYPE IS / CLASS IS cases. */
9177 for (body
= code
->block
; body
; body
= body
->block
)
9179 c
= body
->ext
.block
.case_list
;
9183 /* Check for repeated cases. */
9184 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9186 gfc_case
*d
= tail
->ext
.block
.case_list
;
9190 if (c
->ts
.type
== d
->ts
.type
9191 && ((c
->ts
.type
== BT_DERIVED
9192 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9193 && !strcmp (c
->ts
.u
.derived
->name
,
9194 d
->ts
.u
.derived
->name
))
9195 || c
->ts
.type
== BT_UNKNOWN
9196 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9197 && c
->ts
.kind
== d
->ts
.kind
)))
9199 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9200 &c
->where
, &d
->where
);
9206 /* Check F03:C815. */
9207 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9208 && !selector_type
->attr
.unlimited_polymorphic
9209 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9211 gfc_error ("Derived type %qs at %L must be extensible",
9212 c
->ts
.u
.derived
->name
, &c
->where
);
9217 /* Check F03:C816. */
9218 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9219 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9220 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9222 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9223 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9224 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9226 gfc_error ("Unexpected intrinsic type %qs at %L",
9227 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9232 /* Check F03:C814. */
9233 if (c
->ts
.type
== BT_CHARACTER
9234 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9236 gfc_error ("The type-spec at %L shall specify that each length "
9237 "type parameter is assumed", &c
->where
);
9242 /* Intercept the DEFAULT case. */
9243 if (c
->ts
.type
== BT_UNKNOWN
)
9245 /* Check F03:C818. */
9248 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9249 "by a second DEFAULT CASE at %L",
9250 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9255 default_case
= body
;
9262 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9263 target if present. If there are any EXIT statements referring to the
9264 SELECT TYPE construct, this is no problem because the gfc_code
9265 reference stays the same and EXIT is equally possible from the BLOCK
9266 it is changed to. */
9267 code
->op
= EXEC_BLOCK
;
9270 gfc_association_list
* assoc
;
9272 assoc
= gfc_get_association_list ();
9273 assoc
->st
= code
->expr1
->symtree
;
9274 assoc
->target
= gfc_copy_expr (code
->expr2
);
9275 assoc
->target
->where
= code
->expr2
->where
;
9276 /* assoc->variable will be set by resolve_assoc_var. */
9278 code
->ext
.block
.assoc
= assoc
;
9279 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9281 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9284 code
->ext
.block
.assoc
= NULL
;
9286 /* Ensure that the selector rank and arrayspec are available to
9287 correct expressions in which they might be missing. */
9288 if (code
->expr2
&& code
->expr2
->rank
)
9290 rank
= code
->expr2
->rank
;
9291 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9292 if (ref
->next
== NULL
)
9294 if (ref
&& ref
->type
== REF_ARRAY
)
9295 ref
= gfc_copy_ref (ref
);
9297 /* Fixup expr1 if necessary. */
9299 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9301 else if (code
->expr1
->rank
)
9303 rank
= code
->expr1
->rank
;
9304 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9305 if (ref
->next
== NULL
)
9307 if (ref
&& ref
->type
== REF_ARRAY
)
9308 ref
= gfc_copy_ref (ref
);
9311 /* Add EXEC_SELECT to switch on type. */
9312 new_st
= gfc_get_code (code
->op
);
9313 new_st
->expr1
= code
->expr1
;
9314 new_st
->expr2
= code
->expr2
;
9315 new_st
->block
= code
->block
;
9316 code
->expr1
= code
->expr2
= NULL
;
9321 ns
->code
->next
= new_st
;
9323 code
->op
= EXEC_SELECT_TYPE
;
9325 /* Use the intrinsic LOC function to generate an integer expression
9326 for the vtable of the selector. Note that the rank of the selector
9327 expression has to be set to zero. */
9328 gfc_add_vptr_component (code
->expr1
);
9329 code
->expr1
->rank
= 0;
9330 code
->expr1
= build_loc_call (code
->expr1
);
9331 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9333 /* Loop over TYPE IS / CLASS IS cases. */
9334 for (body
= code
->block
; body
; body
= body
->block
)
9338 c
= body
->ext
.block
.case_list
;
9340 /* Generate an index integer expression for address of the
9341 TYPE/CLASS vtable and store it in c->low. The hash expression
9342 is stored in c->high and is used to resolve intrinsic cases. */
9343 if (c
->ts
.type
!= BT_UNKNOWN
)
9345 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9347 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9349 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9350 c
->ts
.u
.derived
->hash_value
);
9354 vtab
= gfc_find_vtab (&c
->ts
);
9355 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9356 e
= CLASS_DATA (vtab
)->initializer
;
9357 c
->high
= gfc_copy_expr (e
);
9358 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9361 ts
.kind
= gfc_integer_4_kind
;
9362 ts
.type
= BT_INTEGER
;
9363 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9367 e
= gfc_lval_expr_from_sym (vtab
);
9368 c
->low
= build_loc_call (e
);
9373 /* Associate temporary to selector. This should only be done
9374 when this case is actually true, so build a new ASSOCIATE
9375 that does precisely this here (instead of using the
9378 if (c
->ts
.type
== BT_CLASS
)
9379 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9380 else if (c
->ts
.type
== BT_DERIVED
)
9381 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9382 else if (c
->ts
.type
== BT_CHARACTER
)
9384 HOST_WIDE_INT charlen
= 0;
9385 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9386 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9387 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9388 snprintf (name
, sizeof (name
),
9389 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9390 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9393 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9396 st
= gfc_find_symtree (ns
->sym_root
, name
);
9397 gcc_assert (st
->n
.sym
->assoc
);
9398 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9399 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9400 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9402 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9403 /* Fixup the target expression if necessary. */
9405 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9408 new_st
= gfc_get_code (EXEC_BLOCK
);
9409 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9410 new_st
->ext
.block
.ns
->code
= body
->next
;
9411 body
->next
= new_st
;
9413 /* Chain in the new list only if it is marked as dangling. Otherwise
9414 there is a CASE label overlap and this is already used. Just ignore,
9415 the error is diagnosed elsewhere. */
9416 if (st
->n
.sym
->assoc
->dangling
)
9418 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9419 st
->n
.sym
->assoc
->dangling
= 0;
9422 resolve_assoc_var (st
->n
.sym
, false);
9425 /* Take out CLASS IS cases for separate treatment. */
9427 while (body
&& body
->block
)
9429 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9431 /* Add to class_is list. */
9432 if (class_is
== NULL
)
9434 class_is
= body
->block
;
9439 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9440 tail
->block
= body
->block
;
9443 /* Remove from EXEC_SELECT list. */
9444 body
->block
= body
->block
->block
;
9457 /* Add a default case to hold the CLASS IS cases. */
9458 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9459 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9461 tail
->ext
.block
.case_list
= gfc_get_case ();
9462 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9464 default_case
= tail
;
9467 /* More than one CLASS IS block? */
9468 if (class_is
->block
)
9472 /* Sort CLASS IS blocks by extension level. */
9476 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9479 /* F03:C817 (check for doubles). */
9480 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9481 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9483 gfc_error ("Double CLASS IS block in SELECT TYPE "
9485 &c2
->ext
.block
.case_list
->where
);
9488 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9489 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9492 (*c1
)->block
= c2
->block
;
9502 /* Generate IF chain. */
9503 if_st
= gfc_get_code (EXEC_IF
);
9505 for (body
= class_is
; body
; body
= body
->block
)
9507 new_st
->block
= gfc_get_code (EXEC_IF
);
9508 new_st
= new_st
->block
;
9509 /* Set up IF condition: Call _gfortran_is_extension_of. */
9510 new_st
->expr1
= gfc_get_expr ();
9511 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9512 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9513 new_st
->expr1
->ts
.kind
= 4;
9514 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9515 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9516 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9517 /* Set up arguments. */
9518 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9519 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9520 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9521 new_st
->expr1
->where
= code
->loc
;
9522 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9523 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9524 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9525 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9526 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9527 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9528 new_st
->next
= body
->next
;
9530 if (default_case
->next
)
9532 new_st
->block
= gfc_get_code (EXEC_IF
);
9533 new_st
= new_st
->block
;
9534 new_st
->next
= default_case
->next
;
9537 /* Replace CLASS DEFAULT code by the IF chain. */
9538 default_case
->next
= if_st
;
9541 /* Resolve the internal code. This cannot be done earlier because
9542 it requires that the sym->assoc of selectors is set already. */
9543 gfc_current_ns
= ns
;
9544 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9545 gfc_current_ns
= old_ns
;
9552 /* Resolve a SELECT RANK statement. */
9555 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9558 gfc_code
*body
, *new_st
, *tail
;
9560 char tname
[GFC_MAX_SYMBOL_LEN
];
9561 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9563 gfc_expr
*selector_expr
= NULL
;
9565 HOST_WIDE_INT charlen
= 0;
9567 ns
= code
->ext
.block
.ns
;
9570 code
->op
= EXEC_BLOCK
;
9573 gfc_association_list
* assoc
;
9575 assoc
= gfc_get_association_list ();
9576 assoc
->st
= code
->expr1
->symtree
;
9577 assoc
->target
= gfc_copy_expr (code
->expr2
);
9578 assoc
->target
->where
= code
->expr2
->where
;
9579 /* assoc->variable will be set by resolve_assoc_var. */
9581 code
->ext
.block
.assoc
= assoc
;
9582 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9584 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9587 code
->ext
.block
.assoc
= NULL
;
9589 /* Loop over RANK cases. Note that returning on the errors causes a
9590 cascade of further errors because the case blocks do not compile
9592 for (body
= code
->block
; body
; body
= body
->block
)
9594 c
= body
->ext
.block
.case_list
;
9596 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9600 /* Check for repeated cases. */
9601 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9603 gfc_case
*d
= tail
->ext
.block
.case_list
;
9609 /* Check F2018: C1153. */
9610 if (!c
->low
&& !d
->low
)
9611 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9612 &c
->where
, &d
->where
);
9614 if (!c
->low
|| !d
->low
)
9617 /* Check F2018: C1153. */
9618 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9619 if ((case_value
== case_value2
) && case_value
== -1)
9620 gfc_error ("RANK (*) at %L is repeated at %L",
9621 &c
->where
, &d
->where
);
9622 else if (case_value
== case_value2
)
9623 gfc_error ("RANK (%i) at %L is repeated at %L",
9624 case_value
, &c
->where
, &d
->where
);
9630 /* Check F2018: C1155. */
9631 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9632 || gfc_expr_attr (code
->expr1
).pointer
))
9633 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9634 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9636 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9637 || gfc_expr_attr (code
->expr1
).pointer
))
9638 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9639 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9642 /* Add EXEC_SELECT to switch on rank. */
9643 new_st
= gfc_get_code (code
->op
);
9644 new_st
->expr1
= code
->expr1
;
9645 new_st
->expr2
= code
->expr2
;
9646 new_st
->block
= code
->block
;
9647 code
->expr1
= code
->expr2
= NULL
;
9652 ns
->code
->next
= new_st
;
9654 code
->op
= EXEC_SELECT_RANK
;
9656 selector_expr
= code
->expr1
;
9658 /* Loop over SELECT RANK cases. */
9659 for (body
= code
->block
; body
; body
= body
->block
)
9661 c
= body
->ext
.block
.case_list
;
9664 /* Pass on the default case. */
9668 /* Associate temporary to selector. This should only be done
9669 when this case is actually true, so build a new ASSOCIATE
9670 that does precisely this here (instead of using the
9672 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9673 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9674 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9676 if (c
->ts
.type
== BT_CLASS
)
9677 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9678 else if (c
->ts
.type
== BT_DERIVED
)
9679 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9680 else if (c
->ts
.type
!= BT_CHARACTER
)
9681 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9683 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9684 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9686 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9687 if (case_value
>= 0)
9688 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9690 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9692 st
= gfc_find_symtree (ns
->sym_root
, name
);
9693 gcc_assert (st
->n
.sym
->assoc
);
9695 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9696 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9698 new_st
= gfc_get_code (EXEC_BLOCK
);
9699 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9700 new_st
->ext
.block
.ns
->code
= body
->next
;
9701 body
->next
= new_st
;
9703 /* Chain in the new list only if it is marked as dangling. Otherwise
9704 there is a CASE label overlap and this is already used. Just ignore,
9705 the error is diagnosed elsewhere. */
9706 if (st
->n
.sym
->assoc
->dangling
)
9708 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9709 st
->n
.sym
->assoc
->dangling
= 0;
9712 resolve_assoc_var (st
->n
.sym
, false);
9715 gfc_current_ns
= ns
;
9716 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9717 gfc_current_ns
= old_ns
;
9721 /* Resolve a transfer statement. This is making sure that:
9722 -- a derived type being transferred has only non-pointer components
9723 -- a derived type being transferred doesn't have private components, unless
9724 it's being transferred from the module where the type was defined
9725 -- we're not trying to transfer a whole assumed size array. */
9728 resolve_transfer (gfc_code
*code
)
9730 gfc_symbol
*sym
, *derived
;
9734 bool formatted
= false;
9735 gfc_dt
*dt
= code
->ext
.dt
;
9736 gfc_symbol
*dtio_sub
= NULL
;
9740 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9741 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9742 exp
= exp
->value
.op
.op1
;
9744 if (exp
&& exp
->expr_type
== EXPR_NULL
9747 gfc_error ("Invalid context for NULL () intrinsic at %L",
9752 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9753 && exp
->expr_type
!= EXPR_FUNCTION
9754 && exp
->expr_type
!= EXPR_STRUCTURE
))
9757 /* If we are reading, the variable will be changed. Note that
9758 code->ext.dt may be NULL if the TRANSFER is related to
9759 an INQUIRE statement -- but in this case, we are not reading, either. */
9760 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9761 && !gfc_check_vardef_context (exp
, false, false, false,
9765 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9766 || exp
->expr_type
== EXPR_FUNCTION
9767 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9769 /* Go to actual component transferred. */
9770 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9771 if (ref
->type
== REF_COMPONENT
)
9772 ts
= &ref
->u
.c
.component
->ts
;
9774 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9775 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9777 derived
= ts
->u
.derived
;
9779 /* Determine when to use the formatted DTIO procedure. */
9780 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9783 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9784 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9785 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9787 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9790 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9791 /* Check to see if this is a nested DTIO call, with the
9792 dummy as the io-list object. */
9793 if (sym
&& sym
== dtio_sub
&& sym
->formal
9794 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9795 && exp
->ref
== NULL
)
9797 if (!sym
->attr
.recursive
)
9799 gfc_error ("DTIO %s procedure at %L must be recursive",
9800 sym
->name
, &sym
->declared_at
);
9807 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9809 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9810 "it is processed by a defined input/output procedure",
9815 if (ts
->type
== BT_DERIVED
)
9817 /* Check that transferred derived type doesn't contain POINTER
9818 components unless it is processed by a defined input/output
9820 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9822 gfc_error ("Data transfer element at %L cannot have POINTER "
9823 "components unless it is processed by a defined "
9824 "input/output procedure", &code
->loc
);
9829 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9831 gfc_error ("Data transfer element at %L cannot have "
9832 "procedure pointer components", &code
->loc
);
9836 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9838 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9839 "components unless it is processed by a defined "
9840 "input/output procedure", &code
->loc
);
9844 /* C_PTR and C_FUNPTR have private components which means they cannot
9845 be printed. However, if -std=gnu and not -pedantic, allow
9846 the component to be printed to help debugging. */
9847 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9849 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9850 "cannot have PRIVATE components", &code
->loc
))
9853 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9855 gfc_error ("Data transfer element at %L cannot have "
9856 "PRIVATE components unless it is processed by "
9857 "a defined input/output procedure", &code
->loc
);
9862 if (exp
->expr_type
== EXPR_STRUCTURE
)
9865 sym
= exp
->symtree
->n
.sym
;
9867 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9868 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9870 gfc_error ("Data transfer element at %L cannot be a full reference to "
9871 "an assumed-size array", &code
->loc
);
9875 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9876 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9880 /*********** Toplevel code resolution subroutines ***********/
9882 /* Find the set of labels that are reachable from this block. We also
9883 record the last statement in each block. */
9886 find_reachable_labels (gfc_code
*block
)
9893 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9895 /* Collect labels in this block. We don't keep those corresponding
9896 to END {IF|SELECT}, these are checked in resolve_branch by going
9897 up through the code_stack. */
9898 for (c
= block
; c
; c
= c
->next
)
9900 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9901 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9904 /* Merge with labels from parent block. */
9907 gcc_assert (cs_base
->prev
->reachable_labels
);
9908 bitmap_ior_into (cs_base
->reachable_labels
,
9909 cs_base
->prev
->reachable_labels
);
9915 resolve_lock_unlock_event (gfc_code
*code
)
9917 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9918 && code
->expr1
->value
.function
.isym
9919 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9920 remove_caf_get_intrinsic (code
->expr1
);
9922 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9923 && (code
->expr1
->ts
.type
!= BT_DERIVED
9924 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9925 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9926 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9927 || code
->expr1
->rank
!= 0
9928 || (!gfc_is_coarray (code
->expr1
) &&
9929 !gfc_is_coindexed (code
->expr1
))))
9930 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9931 &code
->expr1
->where
);
9932 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9933 && (code
->expr1
->ts
.type
!= BT_DERIVED
9934 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9935 || code
->expr1
->ts
.u
.derived
->from_intmod
9936 != INTMOD_ISO_FORTRAN_ENV
9937 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9938 != ISOFORTRAN_EVENT_TYPE
9939 || code
->expr1
->rank
!= 0))
9940 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9941 &code
->expr1
->where
);
9942 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9943 && !gfc_is_coindexed (code
->expr1
))
9944 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9945 &code
->expr1
->where
);
9946 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9947 gfc_error ("Event variable argument at %L must be a coarray but not "
9948 "coindexed", &code
->expr1
->where
);
9952 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9953 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9954 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9955 &code
->expr2
->where
);
9958 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9959 _("STAT variable")))
9964 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9965 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9966 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9967 &code
->expr3
->where
);
9970 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9971 _("ERRMSG variable")))
9974 /* Check for LOCK the ACQUIRED_LOCK. */
9975 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9976 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9977 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9978 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9979 "variable", &code
->expr4
->where
);
9981 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9982 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9983 _("ACQUIRED_LOCK variable")))
9986 /* Check for EVENT WAIT the UNTIL_COUNT. */
9987 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9989 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9990 || code
->expr4
->rank
!= 0)
9991 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9992 "expression", &code
->expr4
->where
);
9998 resolve_critical (gfc_code
*code
)
10000 gfc_symtree
*symtree
;
10001 gfc_symbol
*lock_type
;
10002 char name
[GFC_MAX_SYMBOL_LEN
];
10003 static int serial
= 0;
10005 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10008 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10009 GFC_PREFIX ("lock_type"));
10011 lock_type
= symtree
->n
.sym
;
10014 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10016 gcc_unreachable ();
10017 lock_type
= symtree
->n
.sym
;
10018 lock_type
->attr
.flavor
= FL_DERIVED
;
10019 lock_type
->attr
.zero_comp
= 1;
10020 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10021 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10024 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10025 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10026 gcc_unreachable ();
10028 code
->resolved_sym
= symtree
->n
.sym
;
10029 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10030 symtree
->n
.sym
->attr
.referenced
= 1;
10031 symtree
->n
.sym
->attr
.artificial
= 1;
10032 symtree
->n
.sym
->attr
.codimension
= 1;
10033 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10034 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10035 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10036 symtree
->n
.sym
->as
->corank
= 1;
10037 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10038 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10039 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10041 gfc_commit_symbols();
10046 resolve_sync (gfc_code
*code
)
10048 /* Check imageset. The * case matches expr1 == NULL. */
10051 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10052 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10053 "INTEGER expression", &code
->expr1
->where
);
10054 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10055 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10056 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10057 &code
->expr1
->where
);
10058 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10059 && gfc_simplify_expr (code
->expr1
, 0))
10061 gfc_constructor
*cons
;
10062 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10063 for (; cons
; cons
= gfc_constructor_next (cons
))
10064 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10065 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10066 gfc_error ("Imageset argument at %L must between 1 and "
10067 "num_images()", &cons
->expr
->where
);
10072 gfc_resolve_expr (code
->expr2
);
10074 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10075 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10076 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10077 &code
->expr2
->where
);
10079 /* Check ERRMSG. */
10080 gfc_resolve_expr (code
->expr3
);
10082 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10083 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10084 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10085 &code
->expr3
->where
);
10089 /* Given a branch to a label, see if the branch is conforming.
10090 The code node describes where the branch is located. */
10093 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10100 /* Step one: is this a valid branching target? */
10102 if (label
->defined
== ST_LABEL_UNKNOWN
)
10104 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10109 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10111 gfc_error ("Statement at %L is not a valid branch target statement "
10112 "for the branch statement at %L", &label
->where
, &code
->loc
);
10116 /* Step two: make sure this branch is not a branch to itself ;-) */
10118 if (code
->here
== label
)
10121 "Branch at %L may result in an infinite loop", &code
->loc
);
10125 /* Step three: See if the label is in the same block as the
10126 branching statement. The hard work has been done by setting up
10127 the bitmap reachable_labels. */
10129 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10131 /* Check now whether there is a CRITICAL construct; if so, check
10132 whether the label is still visible outside of the CRITICAL block,
10133 which is invalid. */
10134 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10136 if (stack
->current
->op
== EXEC_CRITICAL
10137 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10138 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10139 "label at %L", &code
->loc
, &label
->where
);
10140 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10141 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10142 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10143 "for label at %L", &code
->loc
, &label
->where
);
10149 /* Step four: If we haven't found the label in the bitmap, it may
10150 still be the label of the END of the enclosing block, in which
10151 case we find it by going up the code_stack. */
10153 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10155 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10157 if (stack
->current
->op
== EXEC_CRITICAL
)
10159 /* Note: A label at END CRITICAL does not leave the CRITICAL
10160 construct as END CRITICAL is still part of it. */
10161 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10162 " at %L", &code
->loc
, &label
->where
);
10165 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10167 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10168 "label at %L", &code
->loc
, &label
->where
);
10175 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10179 /* The label is not in an enclosing block, so illegal. This was
10180 allowed in Fortran 66, so we allow it as extension. No
10181 further checks are necessary in this case. */
10182 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10183 "as the GOTO statement at %L", &label
->where
,
10189 /* Check whether EXPR1 has the same shape as EXPR2. */
10192 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10194 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10195 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10196 bool result
= false;
10199 /* Compare the rank. */
10200 if (expr1
->rank
!= expr2
->rank
)
10203 /* Compare the size of each dimension. */
10204 for (i
=0; i
<expr1
->rank
; i
++)
10206 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10209 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10212 if (mpz_cmp (shape
[i
], shape2
[i
]))
10216 /* When either of the two expression is an assumed size array, we
10217 ignore the comparison of dimension sizes. */
10222 gfc_clear_shape (shape
, i
);
10223 gfc_clear_shape (shape2
, i
);
10228 /* Check whether a WHERE assignment target or a WHERE mask expression
10229 has the same shape as the outmost WHERE mask expression. */
10232 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10236 gfc_expr
*e
= NULL
;
10238 cblock
= code
->block
;
10240 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10241 In case of nested WHERE, only the outmost one is stored. */
10242 if (mask
== NULL
) /* outmost WHERE */
10244 else /* inner WHERE */
10251 /* Check if the mask-expr has a consistent shape with the
10252 outmost WHERE mask-expr. */
10253 if (!resolve_where_shape (cblock
->expr1
, e
))
10254 gfc_error ("WHERE mask at %L has inconsistent shape",
10255 &cblock
->expr1
->where
);
10258 /* the assignment statement of a WHERE statement, or the first
10259 statement in where-body-construct of a WHERE construct */
10260 cnext
= cblock
->next
;
10265 /* WHERE assignment statement */
10268 /* Check shape consistent for WHERE assignment target. */
10269 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10270 gfc_error ("WHERE assignment target at %L has "
10271 "inconsistent shape", &cnext
->expr1
->where
);
10275 case EXEC_ASSIGN_CALL
:
10276 resolve_call (cnext
);
10277 if (!cnext
->resolved_sym
->attr
.elemental
)
10278 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10279 &cnext
->ext
.actual
->expr
->where
);
10282 /* WHERE or WHERE construct is part of a where-body-construct */
10284 resolve_where (cnext
, e
);
10288 gfc_error ("Unsupported statement inside WHERE at %L",
10291 /* the next statement within the same where-body-construct */
10292 cnext
= cnext
->next
;
10294 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10295 cblock
= cblock
->block
;
10300 /* Resolve assignment in FORALL construct.
10301 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10302 FORALL index variables. */
10305 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10309 for (n
= 0; n
< nvar
; n
++)
10311 gfc_symbol
*forall_index
;
10313 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10315 /* Check whether the assignment target is one of the FORALL index
10317 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10318 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10319 gfc_error ("Assignment to a FORALL index variable at %L",
10320 &code
->expr1
->where
);
10323 /* If one of the FORALL index variables doesn't appear in the
10324 assignment variable, then there could be a many-to-one
10325 assignment. Emit a warning rather than an error because the
10326 mask could be resolving this problem. */
10327 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10328 gfc_warning (0, "The FORALL with index %qs is not used on the "
10329 "left side of the assignment at %L and so might "
10330 "cause multiple assignment to this object",
10331 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10337 /* Resolve WHERE statement in FORALL construct. */
10340 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10341 gfc_expr
**var_expr
)
10346 cblock
= code
->block
;
10349 /* the assignment statement of a WHERE statement, or the first
10350 statement in where-body-construct of a WHERE construct */
10351 cnext
= cblock
->next
;
10356 /* WHERE assignment statement */
10358 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10361 /* WHERE operator assignment statement */
10362 case EXEC_ASSIGN_CALL
:
10363 resolve_call (cnext
);
10364 if (!cnext
->resolved_sym
->attr
.elemental
)
10365 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10366 &cnext
->ext
.actual
->expr
->where
);
10369 /* WHERE or WHERE construct is part of a where-body-construct */
10371 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10375 gfc_error ("Unsupported statement inside WHERE at %L",
10378 /* the next statement within the same where-body-construct */
10379 cnext
= cnext
->next
;
10381 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10382 cblock
= cblock
->block
;
10387 /* Traverse the FORALL body to check whether the following errors exist:
10388 1. For assignment, check if a many-to-one assignment happens.
10389 2. For WHERE statement, check the WHERE body to see if there is any
10390 many-to-one assignment. */
10393 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10397 c
= code
->block
->next
;
10403 case EXEC_POINTER_ASSIGN
:
10404 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10407 case EXEC_ASSIGN_CALL
:
10411 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10412 there is no need to handle it here. */
10416 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10421 /* The next statement in the FORALL body. */
10427 /* Counts the number of iterators needed inside a forall construct, including
10428 nested forall constructs. This is used to allocate the needed memory
10429 in gfc_resolve_forall. */
10432 gfc_count_forall_iterators (gfc_code
*code
)
10434 int max_iters
, sub_iters
, current_iters
;
10435 gfc_forall_iterator
*fa
;
10437 gcc_assert(code
->op
== EXEC_FORALL
);
10441 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10444 code
= code
->block
->next
;
10448 if (code
->op
== EXEC_FORALL
)
10450 sub_iters
= gfc_count_forall_iterators (code
);
10451 if (sub_iters
> max_iters
)
10452 max_iters
= sub_iters
;
10457 return current_iters
+ max_iters
;
10461 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10462 gfc_resolve_forall_body to resolve the FORALL body. */
10465 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10467 static gfc_expr
**var_expr
;
10468 static int total_var
= 0;
10469 static int nvar
= 0;
10470 int i
, old_nvar
, tmp
;
10471 gfc_forall_iterator
*fa
;
10475 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10478 /* Start to resolve a FORALL construct */
10479 if (forall_save
== 0)
10481 /* Count the total number of FORALL indices in the nested FORALL
10482 construct in order to allocate the VAR_EXPR with proper size. */
10483 total_var
= gfc_count_forall_iterators (code
);
10485 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10486 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10489 /* The information about FORALL iterator, including FORALL indices start, end
10490 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10491 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10493 /* Fortran 20008: C738 (R753). */
10494 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10496 gfc_error ("FORALL index-name at %L must be a scalar variable "
10497 "of type integer", &fa
->var
->where
);
10501 /* Check if any outer FORALL index name is the same as the current
10503 for (i
= 0; i
< nvar
; i
++)
10505 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10506 gfc_error ("An outer FORALL construct already has an index "
10507 "with this name %L", &fa
->var
->where
);
10510 /* Record the current FORALL index. */
10511 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10515 /* No memory leak. */
10516 gcc_assert (nvar
<= total_var
);
10519 /* Resolve the FORALL body. */
10520 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10522 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10523 gfc_resolve_blocks (code
->block
, ns
);
10527 /* Free only the VAR_EXPRs allocated in this frame. */
10528 for (i
= nvar
; i
< tmp
; i
++)
10529 gfc_free_expr (var_expr
[i
]);
10533 /* We are in the outermost FORALL construct. */
10534 gcc_assert (forall_save
== 0);
10536 /* VAR_EXPR is not needed any more. */
10543 /* Resolve a BLOCK construct statement. */
10546 resolve_block_construct (gfc_code
* code
)
10548 /* Resolve the BLOCK's namespace. */
10549 gfc_resolve (code
->ext
.block
.ns
);
10551 /* For an ASSOCIATE block, the associations (and their targets) are already
10552 resolved during resolve_symbol. */
10556 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10560 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10564 for (; b
; b
= b
->block
)
10566 t
= gfc_resolve_expr (b
->expr1
);
10567 if (!gfc_resolve_expr (b
->expr2
))
10573 if (t
&& b
->expr1
!= NULL
10574 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10575 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10581 && b
->expr1
!= NULL
10582 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10583 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10588 resolve_branch (b
->label1
, b
);
10592 resolve_block_construct (b
);
10596 case EXEC_SELECT_TYPE
:
10597 case EXEC_SELECT_RANK
:
10600 case EXEC_DO_WHILE
:
10601 case EXEC_DO_CONCURRENT
:
10602 case EXEC_CRITICAL
:
10605 case EXEC_IOLENGTH
:
10609 case EXEC_OMP_ATOMIC
:
10610 case EXEC_OACC_ATOMIC
:
10612 gfc_omp_atomic_op aop
10613 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10615 /* Verify this before calling gfc_resolve_code, which might
10617 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10618 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10619 && b
->next
->next
== NULL
)
10620 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10621 && b
->next
->next
!= NULL
10622 && b
->next
->next
->op
== EXEC_ASSIGN
10623 && b
->next
->next
->next
== NULL
));
10627 case EXEC_OACC_PARALLEL_LOOP
:
10628 case EXEC_OACC_PARALLEL
:
10629 case EXEC_OACC_KERNELS_LOOP
:
10630 case EXEC_OACC_KERNELS
:
10631 case EXEC_OACC_SERIAL_LOOP
:
10632 case EXEC_OACC_SERIAL
:
10633 case EXEC_OACC_DATA
:
10634 case EXEC_OACC_HOST_DATA
:
10635 case EXEC_OACC_LOOP
:
10636 case EXEC_OACC_UPDATE
:
10637 case EXEC_OACC_WAIT
:
10638 case EXEC_OACC_CACHE
:
10639 case EXEC_OACC_ENTER_DATA
:
10640 case EXEC_OACC_EXIT_DATA
:
10641 case EXEC_OACC_ROUTINE
:
10642 case EXEC_OMP_CRITICAL
:
10643 case EXEC_OMP_DISTRIBUTE
:
10644 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10645 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10646 case EXEC_OMP_DISTRIBUTE_SIMD
:
10648 case EXEC_OMP_DO_SIMD
:
10649 case EXEC_OMP_MASTER
:
10650 case EXEC_OMP_ORDERED
:
10651 case EXEC_OMP_PARALLEL
:
10652 case EXEC_OMP_PARALLEL_DO
:
10653 case EXEC_OMP_PARALLEL_DO_SIMD
:
10654 case EXEC_OMP_PARALLEL_SECTIONS
:
10655 case EXEC_OMP_PARALLEL_WORKSHARE
:
10656 case EXEC_OMP_SECTIONS
:
10657 case EXEC_OMP_SIMD
:
10658 case EXEC_OMP_SINGLE
:
10659 case EXEC_OMP_TARGET
:
10660 case EXEC_OMP_TARGET_DATA
:
10661 case EXEC_OMP_TARGET_ENTER_DATA
:
10662 case EXEC_OMP_TARGET_EXIT_DATA
:
10663 case EXEC_OMP_TARGET_PARALLEL
:
10664 case EXEC_OMP_TARGET_PARALLEL_DO
:
10665 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10666 case EXEC_OMP_TARGET_SIMD
:
10667 case EXEC_OMP_TARGET_TEAMS
:
10668 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10669 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10670 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10671 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10672 case EXEC_OMP_TARGET_UPDATE
:
10673 case EXEC_OMP_TASK
:
10674 case EXEC_OMP_TASKGROUP
:
10675 case EXEC_OMP_TASKLOOP
:
10676 case EXEC_OMP_TASKLOOP_SIMD
:
10677 case EXEC_OMP_TASKWAIT
:
10678 case EXEC_OMP_TASKYIELD
:
10679 case EXEC_OMP_TEAMS
:
10680 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10681 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10682 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10683 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10684 case EXEC_OMP_WORKSHARE
:
10688 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10691 gfc_resolve_code (b
->next
, ns
);
10696 /* Does everything to resolve an ordinary assignment. Returns true
10697 if this is an interface assignment. */
10699 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10706 symbol_attribute attr
;
10708 if (gfc_extend_assign (code
, ns
))
10712 if (code
->op
== EXEC_ASSIGN_CALL
)
10714 lhs
= code
->ext
.actual
->expr
;
10715 rhsptr
= &code
->ext
.actual
->next
->expr
;
10719 gfc_actual_arglist
* args
;
10720 gfc_typebound_proc
* tbp
;
10722 gcc_assert (code
->op
== EXEC_COMPCALL
);
10724 args
= code
->expr1
->value
.compcall
.actual
;
10726 rhsptr
= &args
->next
->expr
;
10728 tbp
= code
->expr1
->value
.compcall
.tbp
;
10729 gcc_assert (!tbp
->is_generic
);
10732 /* Make a temporary rhs when there is a default initializer
10733 and rhs is the same symbol as the lhs. */
10734 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10735 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10736 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10737 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10738 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10746 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10747 && rhs
->ts
.type
== BT_CHARACTER
10748 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10750 /* Use of -fdec-char-conversions allows assignment of character data
10751 to non-character variables. This not permited for nonconstant
10753 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10754 gfc_typename (lhs
), &rhs
->where
);
10758 /* Handle the case of a BOZ literal on the RHS. */
10759 if (rhs
->ts
.type
== BT_BOZ
)
10761 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10762 "statement value nor an actual argument of "
10763 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10767 switch (lhs
->ts
.type
)
10770 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10774 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10778 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10783 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10785 HOST_WIDE_INT llen
= 0, rlen
= 0;
10786 if (lhs
->ts
.u
.cl
!= NULL
10787 && lhs
->ts
.u
.cl
->length
!= NULL
10788 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10789 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10791 if (rhs
->expr_type
== EXPR_CONSTANT
)
10792 rlen
= rhs
->value
.character
.length
;
10794 else if (rhs
->ts
.u
.cl
!= NULL
10795 && rhs
->ts
.u
.cl
->length
!= NULL
10796 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10797 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10799 if (rlen
&& llen
&& rlen
> llen
)
10800 gfc_warning_now (OPT_Wcharacter_truncation
,
10801 "CHARACTER expression will be truncated "
10802 "in assignment (%ld/%ld) at %L",
10803 (long) llen
, (long) rlen
, &code
->loc
);
10806 /* Ensure that a vector index expression for the lvalue is evaluated
10807 to a temporary if the lvalue symbol is referenced in it. */
10810 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10811 if (ref
->type
== REF_ARRAY
)
10813 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10814 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10815 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10816 ref
->u
.ar
.start
[n
]))
10818 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10822 if (gfc_pure (NULL
))
10824 if (lhs
->ts
.type
== BT_DERIVED
10825 && lhs
->expr_type
== EXPR_VARIABLE
10826 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10827 && rhs
->expr_type
== EXPR_VARIABLE
10828 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10829 || gfc_is_coindexed (rhs
)))
10831 /* F2008, C1283. */
10832 if (gfc_is_coindexed (rhs
))
10833 gfc_error ("Coindexed expression at %L is assigned to "
10834 "a derived type variable with a POINTER "
10835 "component in a PURE procedure",
10838 /* F2008, C1283 (4). */
10839 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10840 "shall not be used as the expr at %L of an intrinsic "
10841 "assignment statement in which the variable is of a "
10842 "derived type if the derived type has a pointer "
10843 "component at any level of component selection.",
10848 /* Fortran 2008, C1283. */
10849 if (gfc_is_coindexed (lhs
))
10851 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10852 "procedure", &rhs
->where
);
10857 if (gfc_implicit_pure (NULL
))
10859 if (lhs
->expr_type
== EXPR_VARIABLE
10860 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10861 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10862 gfc_unset_implicit_pure (NULL
);
10864 if (lhs
->ts
.type
== BT_DERIVED
10865 && lhs
->expr_type
== EXPR_VARIABLE
10866 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10867 && rhs
->expr_type
== EXPR_VARIABLE
10868 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10869 || gfc_is_coindexed (rhs
)))
10870 gfc_unset_implicit_pure (NULL
);
10872 /* Fortran 2008, C1283. */
10873 if (gfc_is_coindexed (lhs
))
10874 gfc_unset_implicit_pure (NULL
);
10877 /* F2008, 7.2.1.2. */
10878 attr
= gfc_expr_attr (lhs
);
10879 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10881 if (attr
.codimension
)
10883 gfc_error ("Assignment to polymorphic coarray at %L is not "
10884 "permitted", &lhs
->where
);
10887 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10888 "polymorphic variable at %L", &lhs
->where
))
10890 if (!flag_realloc_lhs
)
10892 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10893 "requires %<-frealloc-lhs%>", &lhs
->where
);
10897 else if (lhs
->ts
.type
== BT_CLASS
)
10899 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10900 "assignment at %L - check that there is a matching specific "
10901 "subroutine for '=' operator", &lhs
->where
);
10905 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10907 /* F2008, Section 7.2.1.2. */
10908 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10910 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10911 "component in assignment at %L", &lhs
->where
);
10915 /* Assign the 'data' of a class object to a derived type. */
10916 if (lhs
->ts
.type
== BT_DERIVED
10917 && rhs
->ts
.type
== BT_CLASS
10918 && rhs
->expr_type
!= EXPR_ARRAY
)
10919 gfc_add_data_component (rhs
);
10921 /* Make sure there is a vtable and, in particular, a _copy for the
10923 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10924 gfc_find_vtab (&rhs
->ts
);
10926 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10928 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10929 && code
->expr2
->value
.function
.isym
10930 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10931 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10932 && !gfc_expr_attr (rhs
).allocatable
10933 && !gfc_has_vector_subscript (rhs
)));
10935 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10937 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10938 Additionally, insert this code when the RHS is a CAF as we then use the
10939 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10940 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10941 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10943 if (caf_convert_to_send
)
10945 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10946 && code
->expr2
->value
.function
.isym
10947 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10948 remove_caf_get_intrinsic (code
->expr2
);
10949 code
->op
= EXEC_CALL
;
10950 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10951 code
->resolved_sym
= code
->symtree
->n
.sym
;
10952 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10953 code
->resolved_sym
->attr
.intrinsic
= 1;
10954 code
->resolved_sym
->attr
.subroutine
= 1;
10955 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10956 gfc_commit_symbol (code
->resolved_sym
);
10957 code
->ext
.actual
= gfc_get_actual_arglist ();
10958 code
->ext
.actual
->expr
= lhs
;
10959 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10960 code
->ext
.actual
->next
->expr
= rhs
;
10961 code
->expr1
= NULL
;
10962 code
->expr2
= NULL
;
10969 /* Add a component reference onto an expression. */
10972 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10977 ref
= &((*ref
)->next
);
10978 *ref
= gfc_get_ref ();
10979 (*ref
)->type
= REF_COMPONENT
;
10980 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10981 (*ref
)->u
.c
.component
= c
;
10984 /* Add a full array ref, as necessary. */
10987 gfc_add_full_array_ref (e
, c
->as
);
10988 e
->rank
= c
->as
->rank
;
10993 /* Build an assignment. Keep the argument 'op' for future use, so that
10994 pointer assignments can be made. */
10997 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10998 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11000 gfc_code
*this_code
;
11002 this_code
= gfc_get_code (op
);
11003 this_code
->next
= NULL
;
11004 this_code
->expr1
= gfc_copy_expr (expr1
);
11005 this_code
->expr2
= gfc_copy_expr (expr2
);
11006 this_code
->loc
= loc
;
11007 if (comp1
&& comp2
)
11009 add_comp_ref (this_code
->expr1
, comp1
);
11010 add_comp_ref (this_code
->expr2
, comp2
);
11017 /* Makes a temporary variable expression based on the characteristics of
11018 a given variable expression. */
11021 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11023 static int serial
= 0;
11024 char name
[GFC_MAX_SYMBOL_LEN
];
11026 gfc_array_spec
*as
;
11027 gfc_array_ref
*aref
;
11030 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11031 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11032 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11034 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11035 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11037 e
->value
.character
.length
);
11043 /* Obtain the arrayspec for the temporary. */
11044 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11045 && e
->expr_type
!= EXPR_FUNCTION
11046 && e
->expr_type
!= EXPR_OP
)
11048 aref
= gfc_find_array_ref (e
);
11049 if (e
->expr_type
== EXPR_VARIABLE
11050 && e
->symtree
->n
.sym
->as
== aref
->as
)
11054 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11055 if (ref
->type
== REF_COMPONENT
11056 && ref
->u
.c
.component
->as
== aref
->as
)
11064 /* Add the attributes and the arrayspec to the temporary. */
11065 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11066 tmp
->n
.sym
->attr
.function
= 0;
11067 tmp
->n
.sym
->attr
.result
= 0;
11068 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11069 tmp
->n
.sym
->attr
.dummy
= 0;
11070 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11074 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11077 if (as
->type
== AS_DEFERRED
)
11078 tmp
->n
.sym
->attr
.allocatable
= 1;
11080 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11081 || e
->expr_type
== EXPR_FUNCTION
11082 || e
->expr_type
== EXPR_OP
))
11084 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11085 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11086 tmp
->n
.sym
->as
->rank
= e
->rank
;
11087 tmp
->n
.sym
->attr
.allocatable
= 1;
11088 tmp
->n
.sym
->attr
.dimension
= 1;
11091 tmp
->n
.sym
->attr
.dimension
= 0;
11093 gfc_set_sym_referenced (tmp
->n
.sym
);
11094 gfc_commit_symbol (tmp
->n
.sym
);
11095 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11097 /* Should the lhs be a section, use its array ref for the
11098 temporary expression. */
11099 if (aref
&& aref
->type
!= AR_FULL
)
11101 gfc_free_ref_list (e
->ref
);
11102 e
->ref
= gfc_copy_ref (ref
);
11108 /* Add one line of code to the code chain, making sure that 'head' and
11109 'tail' are appropriately updated. */
11112 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11114 gcc_assert (this_code
);
11116 *head
= *tail
= *this_code
;
11118 *tail
= gfc_append_code (*tail
, *this_code
);
11123 /* Counts the potential number of part array references that would
11124 result from resolution of typebound defined assignments. */
11127 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11130 int c_depth
= 0, t_depth
;
11132 for (c
= derived
->components
; c
; c
= c
->next
)
11134 if ((!gfc_bt_struct (c
->ts
.type
)
11136 || c
->attr
.allocatable
11137 || c
->attr
.proc_pointer_comp
11138 || c
->attr
.class_pointer
11139 || c
->attr
.proc_pointer
)
11140 && !c
->attr
.defined_assign_comp
)
11143 if (c
->as
&& c_depth
== 0)
11146 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11147 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11152 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11154 return depth
+ c_depth
;
11158 /* Implement 7.2.1.3 of the F08 standard:
11159 "An intrinsic assignment where the variable is of derived type is
11160 performed as if each component of the variable were assigned from the
11161 corresponding component of expr using pointer assignment (7.2.2) for
11162 each pointer component, defined assignment for each nonpointer
11163 nonallocatable component of a type that has a type-bound defined
11164 assignment consistent with the component, intrinsic assignment for
11165 each other nonpointer nonallocatable component, ..."
11167 The pointer assignments are taken care of by the intrinsic
11168 assignment of the structure itself. This function recursively adds
11169 defined assignments where required. The recursion is accomplished
11170 by calling gfc_resolve_code.
11172 When the lhs in a defined assignment has intent INOUT, we need a
11173 temporary for the lhs. In pseudo-code:
11175 ! Only call function lhs once.
11176 if (lhs is not a constant or an variable)
11179 ! Do the intrinsic assignment
11181 ! Now do the defined assignments
11182 do over components with typebound defined assignment [%cmp]
11183 #if one component's assignment procedure is INOUT
11185 #if expr2 non-variable
11191 t1%cmp {defined=} expr2%cmp
11197 expr1%cmp {defined=} expr2%cmp
11201 /* The temporary assignments have to be put on top of the additional
11202 code to avoid the result being changed by the intrinsic assignment.
11204 static int component_assignment_level
= 0;
11205 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11208 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11210 gfc_component
*comp1
, *comp2
;
11211 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11213 int error_count
, depth
;
11215 gfc_get_errors (NULL
, &error_count
);
11217 /* Filter out continuing processing after an error. */
11219 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11220 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11223 /* TODO: Handle more than one part array reference in assignments. */
11224 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11225 (*code
)->expr1
->rank
? 1 : 0);
11228 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11229 "done because multiple part array references would "
11230 "occur in intermediate expressions.", &(*code
)->loc
);
11234 component_assignment_level
++;
11236 /* Create a temporary so that functions get called only once. */
11237 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11238 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11240 gfc_expr
*tmp_expr
;
11242 /* Assign the rhs to the temporary. */
11243 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11244 this_code
= build_assignment (EXEC_ASSIGN
,
11245 tmp_expr
, (*code
)->expr2
,
11246 NULL
, NULL
, (*code
)->loc
);
11247 /* Add the code and substitute the rhs expression. */
11248 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11249 gfc_free_expr ((*code
)->expr2
);
11250 (*code
)->expr2
= tmp_expr
;
11253 /* Do the intrinsic assignment. This is not needed if the lhs is one
11254 of the temporaries generated here, since the intrinsic assignment
11255 to the final result already does this. */
11256 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11258 this_code
= build_assignment (EXEC_ASSIGN
,
11259 (*code
)->expr1
, (*code
)->expr2
,
11260 NULL
, NULL
, (*code
)->loc
);
11261 add_code_to_chain (&this_code
, &head
, &tail
);
11264 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11265 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11268 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11270 bool inout
= false;
11272 /* The intrinsic assignment does the right thing for pointers
11273 of all kinds and allocatable components. */
11274 if (!gfc_bt_struct (comp1
->ts
.type
)
11275 || comp1
->attr
.pointer
11276 || comp1
->attr
.allocatable
11277 || comp1
->attr
.proc_pointer_comp
11278 || comp1
->attr
.class_pointer
11279 || comp1
->attr
.proc_pointer
)
11282 /* Make an assigment for this component. */
11283 this_code
= build_assignment (EXEC_ASSIGN
,
11284 (*code
)->expr1
, (*code
)->expr2
,
11285 comp1
, comp2
, (*code
)->loc
);
11287 /* Convert the assignment if there is a defined assignment for
11288 this type. Otherwise, using the call from gfc_resolve_code,
11289 recurse into its components. */
11290 gfc_resolve_code (this_code
, ns
);
11292 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11294 gfc_formal_arglist
*dummy_args
;
11296 /* Check that there is a typebound defined assignment. If not,
11297 then this must be a module defined assignment. We cannot
11298 use the defined_assign_comp attribute here because it must
11299 be this derived type that has the defined assignment and not
11301 if (!(comp1
->ts
.u
.derived
->f2k_derived
11302 && comp1
->ts
.u
.derived
->f2k_derived
11303 ->tb_op
[INTRINSIC_ASSIGN
]))
11305 gfc_free_statements (this_code
);
11310 /* If the first argument of the subroutine has intent INOUT
11311 a temporary must be generated and used instead. */
11312 rsym
= this_code
->resolved_sym
;
11313 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11315 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11317 gfc_code
*temp_code
;
11320 /* Build the temporary required for the assignment and put
11321 it at the head of the generated code. */
11324 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11325 temp_code
= build_assignment (EXEC_ASSIGN
,
11326 t1
, (*code
)->expr1
,
11327 NULL
, NULL
, (*code
)->loc
);
11329 /* For allocatable LHS, check whether it is allocated. Note
11330 that allocatable components with defined assignment are
11331 not yet support. See PR 57696. */
11332 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11336 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11337 block
= gfc_get_code (EXEC_IF
);
11338 block
->block
= gfc_get_code (EXEC_IF
);
11339 block
->block
->expr1
11340 = gfc_build_intrinsic_call (ns
,
11341 GFC_ISYM_ALLOCATED
, "allocated",
11342 (*code
)->loc
, 1, e
);
11343 block
->block
->next
= temp_code
;
11346 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11349 /* Replace the first actual arg with the component of the
11351 gfc_free_expr (this_code
->ext
.actual
->expr
);
11352 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11353 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11355 /* If the LHS variable is allocatable and wasn't allocated and
11356 the temporary is allocatable, pointer assign the address of
11357 the freshly allocated LHS to the temporary. */
11358 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11359 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11364 cond
= gfc_get_expr ();
11365 cond
->ts
.type
= BT_LOGICAL
;
11366 cond
->ts
.kind
= gfc_default_logical_kind
;
11367 cond
->expr_type
= EXPR_OP
;
11368 cond
->where
= (*code
)->loc
;
11369 cond
->value
.op
.op
= INTRINSIC_NOT
;
11370 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11371 GFC_ISYM_ALLOCATED
, "allocated",
11372 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11373 block
= gfc_get_code (EXEC_IF
);
11374 block
->block
= gfc_get_code (EXEC_IF
);
11375 block
->block
->expr1
= cond
;
11376 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11377 t1
, (*code
)->expr1
,
11378 NULL
, NULL
, (*code
)->loc
);
11379 add_code_to_chain (&block
, &head
, &tail
);
11383 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11385 /* Don't add intrinsic assignments since they are already
11386 effected by the intrinsic assignment of the structure. */
11387 gfc_free_statements (this_code
);
11392 add_code_to_chain (&this_code
, &head
, &tail
);
11396 /* Transfer the value to the final result. */
11397 this_code
= build_assignment (EXEC_ASSIGN
,
11398 (*code
)->expr1
, t1
,
11399 comp1
, comp2
, (*code
)->loc
);
11400 add_code_to_chain (&this_code
, &head
, &tail
);
11404 /* Put the temporary assignments at the top of the generated code. */
11405 if (tmp_head
&& component_assignment_level
== 1)
11407 gfc_append_code (tmp_head
, head
);
11409 tmp_head
= tmp_tail
= NULL
;
11412 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11413 // not accidentally deallocated. Hence, nullify t1.
11414 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11415 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11421 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11422 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11423 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11424 block
= gfc_get_code (EXEC_IF
);
11425 block
->block
= gfc_get_code (EXEC_IF
);
11426 block
->block
->expr1
= cond
;
11427 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11428 t1
, gfc_get_null_expr (&(*code
)->loc
),
11429 NULL
, NULL
, (*code
)->loc
);
11430 gfc_append_code (tail
, block
);
11434 /* Now attach the remaining code chain to the input code. Step on
11435 to the end of the new code since resolution is complete. */
11436 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11437 tail
->next
= (*code
)->next
;
11438 /* Overwrite 'code' because this would place the intrinsic assignment
11439 before the temporary for the lhs is created. */
11440 gfc_free_expr ((*code
)->expr1
);
11441 gfc_free_expr ((*code
)->expr2
);
11447 component_assignment_level
--;
11451 /* F2008: Pointer function assignments are of the form:
11452 ptr_fcn (args) = expr
11453 This function breaks these assignments into two statements:
11454 temporary_pointer => ptr_fcn(args)
11455 temporary_pointer = expr */
11458 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11460 gfc_expr
*tmp_ptr_expr
;
11461 gfc_code
*this_code
;
11462 gfc_component
*comp
;
11465 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11468 /* Even if standard does not support this feature, continue to build
11469 the two statements to avoid upsetting frontend_passes.c. */
11470 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11471 "%L", &(*code
)->loc
);
11473 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11476 s
= comp
->ts
.interface
;
11478 s
= (*code
)->expr1
->symtree
->n
.sym
;
11480 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11482 gfc_error ("The function result on the lhs of the assignment at "
11483 "%L must have the pointer attribute.",
11484 &(*code
)->expr1
->where
);
11485 (*code
)->op
= EXEC_NOP
;
11489 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11491 /* get_temp_from_expression is set up for ordinary assignments. To that
11492 end, where array bounds are not known, arrays are made allocatable.
11493 Change the temporary to a pointer here. */
11494 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11495 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11496 tmp_ptr_expr
->where
= (*code
)->loc
;
11498 this_code
= build_assignment (EXEC_ASSIGN
,
11499 tmp_ptr_expr
, (*code
)->expr2
,
11500 NULL
, NULL
, (*code
)->loc
);
11501 this_code
->next
= (*code
)->next
;
11502 (*code
)->next
= this_code
;
11503 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11504 (*code
)->expr2
= (*code
)->expr1
;
11505 (*code
)->expr1
= tmp_ptr_expr
;
11511 /* Deferred character length assignments from an operator expression
11512 require a temporary because the character length of the lhs can
11513 change in the course of the assignment. */
11516 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11518 gfc_expr
*tmp_expr
;
11519 gfc_code
*this_code
;
11521 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11522 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11523 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11526 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11529 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11532 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11533 tmp_expr
->where
= (*code
)->loc
;
11535 /* A new charlen is required to ensure that the variable string
11536 length is different to that of the original lhs. */
11537 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11538 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11539 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11540 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11542 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11544 this_code
= build_assignment (EXEC_ASSIGN
,
11546 gfc_copy_expr (tmp_expr
),
11547 NULL
, NULL
, (*code
)->loc
);
11549 (*code
)->expr1
= tmp_expr
;
11551 this_code
->next
= (*code
)->next
;
11552 (*code
)->next
= this_code
;
11558 /* Given a block of code, recursively resolve everything pointed to by this
11562 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11564 int omp_workshare_save
;
11565 int forall_save
, do_concurrent_save
;
11569 frame
.prev
= cs_base
;
11573 find_reachable_labels (code
);
11575 for (; code
; code
= code
->next
)
11577 frame
.current
= code
;
11578 forall_save
= forall_flag
;
11579 do_concurrent_save
= gfc_do_concurrent_flag
;
11581 if (code
->op
== EXEC_FORALL
)
11584 gfc_resolve_forall (code
, ns
, forall_save
);
11587 else if (code
->block
)
11589 omp_workshare_save
= -1;
11592 case EXEC_OACC_PARALLEL_LOOP
:
11593 case EXEC_OACC_PARALLEL
:
11594 case EXEC_OACC_KERNELS_LOOP
:
11595 case EXEC_OACC_KERNELS
:
11596 case EXEC_OACC_SERIAL_LOOP
:
11597 case EXEC_OACC_SERIAL
:
11598 case EXEC_OACC_DATA
:
11599 case EXEC_OACC_HOST_DATA
:
11600 case EXEC_OACC_LOOP
:
11601 gfc_resolve_oacc_blocks (code
, ns
);
11603 case EXEC_OMP_PARALLEL_WORKSHARE
:
11604 omp_workshare_save
= omp_workshare_flag
;
11605 omp_workshare_flag
= 1;
11606 gfc_resolve_omp_parallel_blocks (code
, ns
);
11608 case EXEC_OMP_PARALLEL
:
11609 case EXEC_OMP_PARALLEL_DO
:
11610 case EXEC_OMP_PARALLEL_DO_SIMD
:
11611 case EXEC_OMP_PARALLEL_SECTIONS
:
11612 case EXEC_OMP_TARGET_PARALLEL
:
11613 case EXEC_OMP_TARGET_PARALLEL_DO
:
11614 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11615 case EXEC_OMP_TARGET_TEAMS
:
11616 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11617 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11618 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11619 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11620 case EXEC_OMP_TASK
:
11621 case EXEC_OMP_TASKLOOP
:
11622 case EXEC_OMP_TASKLOOP_SIMD
:
11623 case EXEC_OMP_TEAMS
:
11624 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11625 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11626 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11627 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11628 omp_workshare_save
= omp_workshare_flag
;
11629 omp_workshare_flag
= 0;
11630 gfc_resolve_omp_parallel_blocks (code
, ns
);
11632 case EXEC_OMP_DISTRIBUTE
:
11633 case EXEC_OMP_DISTRIBUTE_SIMD
:
11635 case EXEC_OMP_DO_SIMD
:
11636 case EXEC_OMP_SIMD
:
11637 case EXEC_OMP_TARGET_SIMD
:
11638 gfc_resolve_omp_do_blocks (code
, ns
);
11640 case EXEC_SELECT_TYPE
:
11641 /* Blocks are handled in resolve_select_type because we have
11642 to transform the SELECT TYPE into ASSOCIATE first. */
11644 case EXEC_DO_CONCURRENT
:
11645 gfc_do_concurrent_flag
= 1;
11646 gfc_resolve_blocks (code
->block
, ns
);
11647 gfc_do_concurrent_flag
= 2;
11649 case EXEC_OMP_WORKSHARE
:
11650 omp_workshare_save
= omp_workshare_flag
;
11651 omp_workshare_flag
= 1;
11654 gfc_resolve_blocks (code
->block
, ns
);
11658 if (omp_workshare_save
!= -1)
11659 omp_workshare_flag
= omp_workshare_save
;
11663 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11664 t
= gfc_resolve_expr (code
->expr1
);
11665 forall_flag
= forall_save
;
11666 gfc_do_concurrent_flag
= do_concurrent_save
;
11668 if (!gfc_resolve_expr (code
->expr2
))
11671 if (code
->op
== EXEC_ALLOCATE
11672 && !gfc_resolve_expr (code
->expr3
))
11678 case EXEC_END_BLOCK
:
11679 case EXEC_END_NESTED_BLOCK
:
11683 case EXEC_ERROR_STOP
:
11685 case EXEC_CONTINUE
:
11687 case EXEC_ASSIGN_CALL
:
11690 case EXEC_CRITICAL
:
11691 resolve_critical (code
);
11694 case EXEC_SYNC_ALL
:
11695 case EXEC_SYNC_IMAGES
:
11696 case EXEC_SYNC_MEMORY
:
11697 resolve_sync (code
);
11702 case EXEC_EVENT_POST
:
11703 case EXEC_EVENT_WAIT
:
11704 resolve_lock_unlock_event (code
);
11707 case EXEC_FAIL_IMAGE
:
11708 case EXEC_FORM_TEAM
:
11709 case EXEC_CHANGE_TEAM
:
11710 case EXEC_END_TEAM
:
11711 case EXEC_SYNC_TEAM
:
11715 /* Keep track of which entry we are up to. */
11716 current_entry_id
= code
->ext
.entry
->id
;
11720 resolve_where (code
, NULL
);
11724 if (code
->expr1
!= NULL
)
11726 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11727 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11728 "INTEGER variable", &code
->expr1
->where
);
11729 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11730 gfc_error ("Variable %qs has not been assigned a target "
11731 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11732 &code
->expr1
->where
);
11735 resolve_branch (code
->label1
, code
);
11739 if (code
->expr1
!= NULL
11740 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11741 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11742 "INTEGER return specifier", &code
->expr1
->where
);
11745 case EXEC_INIT_ASSIGN
:
11746 case EXEC_END_PROCEDURE
:
11753 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11755 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11756 && code
->expr1
->value
.function
.isym
11757 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11758 remove_caf_get_intrinsic (code
->expr1
);
11760 /* If this is a pointer function in an lvalue variable context,
11761 the new code will have to be resolved afresh. This is also the
11762 case with an error, where the code is transformed into NOP to
11763 prevent ICEs downstream. */
11764 if (resolve_ptr_fcn_assign (&code
, ns
)
11765 || code
->op
== EXEC_NOP
)
11768 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11772 if (resolve_ordinary_assign (code
, ns
))
11774 if (code
->op
== EXEC_COMPCALL
)
11780 /* Check for dependencies in deferred character length array
11781 assignments and generate a temporary, if necessary. */
11782 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11785 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11786 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11787 && code
->expr1
->ts
.u
.derived
11788 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11789 generate_component_assignments (&code
, ns
);
11793 case EXEC_LABEL_ASSIGN
:
11794 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11795 gfc_error ("Label %d referenced at %L is never defined",
11796 code
->label1
->value
, &code
->label1
->where
);
11798 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11799 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11800 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11801 != gfc_default_integer_kind
11802 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11803 gfc_error ("ASSIGN statement at %L requires a scalar "
11804 "default INTEGER variable", &code
->expr1
->where
);
11807 case EXEC_POINTER_ASSIGN
:
11814 /* This is both a variable definition and pointer assignment
11815 context, so check both of them. For rank remapping, a final
11816 array ref may be present on the LHS and fool gfc_expr_attr
11817 used in gfc_check_vardef_context. Remove it. */
11818 e
= remove_last_array_ref (code
->expr1
);
11819 t
= gfc_check_vardef_context (e
, true, false, false,
11820 _("pointer assignment"));
11822 t
= gfc_check_vardef_context (e
, false, false, false,
11823 _("pointer assignment"));
11826 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11831 /* Assigning a class object always is a regular assign. */
11832 if (code
->expr2
->ts
.type
== BT_CLASS
11833 && code
->expr1
->ts
.type
== BT_CLASS
11834 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11835 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11836 && code
->expr2
->expr_type
== EXPR_VARIABLE
11837 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11839 code
->op
= EXEC_ASSIGN
;
11843 case EXEC_ARITHMETIC_IF
:
11845 gfc_expr
*e
= code
->expr1
;
11847 gfc_resolve_expr (e
);
11848 if (e
->expr_type
== EXPR_NULL
)
11849 gfc_error ("Invalid NULL at %L", &e
->where
);
11851 if (t
&& (e
->rank
> 0
11852 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11853 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11854 "REAL or INTEGER expression", &e
->where
);
11856 resolve_branch (code
->label1
, code
);
11857 resolve_branch (code
->label2
, code
);
11858 resolve_branch (code
->label3
, code
);
11863 if (t
&& code
->expr1
!= NULL
11864 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11865 || code
->expr1
->rank
!= 0))
11866 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11867 &code
->expr1
->where
);
11872 resolve_call (code
);
11875 case EXEC_COMPCALL
:
11877 resolve_typebound_subroutine (code
);
11880 case EXEC_CALL_PPC
:
11881 resolve_ppc_call (code
);
11885 /* Select is complicated. Also, a SELECT construct could be
11886 a transformed computed GOTO. */
11887 resolve_select (code
, false);
11890 case EXEC_SELECT_TYPE
:
11891 resolve_select_type (code
, ns
);
11894 case EXEC_SELECT_RANK
:
11895 resolve_select_rank (code
, ns
);
11899 resolve_block_construct (code
);
11903 if (code
->ext
.iterator
!= NULL
)
11905 gfc_iterator
*iter
= code
->ext
.iterator
;
11906 if (gfc_resolve_iterator (iter
, true, false))
11907 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11912 case EXEC_DO_WHILE
:
11913 if (code
->expr1
== NULL
)
11914 gfc_internal_error ("gfc_resolve_code(): No expression on "
11917 && (code
->expr1
->rank
!= 0
11918 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11919 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11920 "a scalar LOGICAL expression", &code
->expr1
->where
);
11923 case EXEC_ALLOCATE
:
11925 resolve_allocate_deallocate (code
, "ALLOCATE");
11929 case EXEC_DEALLOCATE
:
11931 resolve_allocate_deallocate (code
, "DEALLOCATE");
11936 if (!gfc_resolve_open (code
->ext
.open
))
11939 resolve_branch (code
->ext
.open
->err
, code
);
11943 if (!gfc_resolve_close (code
->ext
.close
))
11946 resolve_branch (code
->ext
.close
->err
, code
);
11949 case EXEC_BACKSPACE
:
11953 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11956 resolve_branch (code
->ext
.filepos
->err
, code
);
11960 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11963 resolve_branch (code
->ext
.inquire
->err
, code
);
11966 case EXEC_IOLENGTH
:
11967 gcc_assert (code
->ext
.inquire
!= NULL
);
11968 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11971 resolve_branch (code
->ext
.inquire
->err
, code
);
11975 if (!gfc_resolve_wait (code
->ext
.wait
))
11978 resolve_branch (code
->ext
.wait
->err
, code
);
11979 resolve_branch (code
->ext
.wait
->end
, code
);
11980 resolve_branch (code
->ext
.wait
->eor
, code
);
11985 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11988 resolve_branch (code
->ext
.dt
->err
, code
);
11989 resolve_branch (code
->ext
.dt
->end
, code
);
11990 resolve_branch (code
->ext
.dt
->eor
, code
);
11993 case EXEC_TRANSFER
:
11994 resolve_transfer (code
);
11997 case EXEC_DO_CONCURRENT
:
11999 resolve_forall_iterators (code
->ext
.forall_iterator
);
12001 if (code
->expr1
!= NULL
12002 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12003 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12004 "expression", &code
->expr1
->where
);
12007 case EXEC_OACC_PARALLEL_LOOP
:
12008 case EXEC_OACC_PARALLEL
:
12009 case EXEC_OACC_KERNELS_LOOP
:
12010 case EXEC_OACC_KERNELS
:
12011 case EXEC_OACC_SERIAL_LOOP
:
12012 case EXEC_OACC_SERIAL
:
12013 case EXEC_OACC_DATA
:
12014 case EXEC_OACC_HOST_DATA
:
12015 case EXEC_OACC_LOOP
:
12016 case EXEC_OACC_UPDATE
:
12017 case EXEC_OACC_WAIT
:
12018 case EXEC_OACC_CACHE
:
12019 case EXEC_OACC_ENTER_DATA
:
12020 case EXEC_OACC_EXIT_DATA
:
12021 case EXEC_OACC_ATOMIC
:
12022 case EXEC_OACC_DECLARE
:
12023 gfc_resolve_oacc_directive (code
, ns
);
12026 case EXEC_OMP_ATOMIC
:
12027 case EXEC_OMP_BARRIER
:
12028 case EXEC_OMP_CANCEL
:
12029 case EXEC_OMP_CANCELLATION_POINT
:
12030 case EXEC_OMP_CRITICAL
:
12031 case EXEC_OMP_FLUSH
:
12032 case EXEC_OMP_DISTRIBUTE
:
12033 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12034 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12035 case EXEC_OMP_DISTRIBUTE_SIMD
:
12037 case EXEC_OMP_DO_SIMD
:
12038 case EXEC_OMP_MASTER
:
12039 case EXEC_OMP_ORDERED
:
12040 case EXEC_OMP_SECTIONS
:
12041 case EXEC_OMP_SIMD
:
12042 case EXEC_OMP_SINGLE
:
12043 case EXEC_OMP_TARGET
:
12044 case EXEC_OMP_TARGET_DATA
:
12045 case EXEC_OMP_TARGET_ENTER_DATA
:
12046 case EXEC_OMP_TARGET_EXIT_DATA
:
12047 case EXEC_OMP_TARGET_PARALLEL
:
12048 case EXEC_OMP_TARGET_PARALLEL_DO
:
12049 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12050 case EXEC_OMP_TARGET_SIMD
:
12051 case EXEC_OMP_TARGET_TEAMS
:
12052 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12053 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12054 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12055 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12056 case EXEC_OMP_TARGET_UPDATE
:
12057 case EXEC_OMP_TASK
:
12058 case EXEC_OMP_TASKGROUP
:
12059 case EXEC_OMP_TASKLOOP
:
12060 case EXEC_OMP_TASKLOOP_SIMD
:
12061 case EXEC_OMP_TASKWAIT
:
12062 case EXEC_OMP_TASKYIELD
:
12063 case EXEC_OMP_TEAMS
:
12064 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12065 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12066 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12067 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12068 case EXEC_OMP_WORKSHARE
:
12069 gfc_resolve_omp_directive (code
, ns
);
12072 case EXEC_OMP_PARALLEL
:
12073 case EXEC_OMP_PARALLEL_DO
:
12074 case EXEC_OMP_PARALLEL_DO_SIMD
:
12075 case EXEC_OMP_PARALLEL_SECTIONS
:
12076 case EXEC_OMP_PARALLEL_WORKSHARE
:
12077 omp_workshare_save
= omp_workshare_flag
;
12078 omp_workshare_flag
= 0;
12079 gfc_resolve_omp_directive (code
, ns
);
12080 omp_workshare_flag
= omp_workshare_save
;
12084 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12088 cs_base
= frame
.prev
;
12092 /* Resolve initial values and make sure they are compatible with
12096 resolve_values (gfc_symbol
*sym
)
12100 if (sym
->value
== NULL
)
12103 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12104 t
= resolve_structure_cons (sym
->value
, 1);
12106 t
= gfc_resolve_expr (sym
->value
);
12111 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12115 /* Verify any BIND(C) derived types in the namespace so we can report errors
12116 for them once, rather than for each variable declared of that type. */
12119 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12121 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12122 && derived_sym
->attr
.is_bind_c
== 1)
12123 verify_bind_c_derived_type (derived_sym
);
12129 /* Check the interfaces of DTIO procedures associated with derived
12130 type 'sym'. These procedures can either have typebound bindings or
12131 can appear in DTIO generic interfaces. */
12134 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12136 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12139 gfc_check_dtio_interfaces (sym
);
12144 /* Verify that any binding labels used in a given namespace do not collide
12145 with the names or binding labels of any global symbols. Multiple INTERFACE
12146 for the same procedure are permitted. */
12149 gfc_verify_binding_labels (gfc_symbol
*sym
)
12152 const char *module
;
12154 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12155 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12158 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12161 module
= sym
->module
;
12162 else if (sym
->ns
&& sym
->ns
->proc_name
12163 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12164 module
= sym
->ns
->proc_name
->name
;
12165 else if (sym
->ns
&& sym
->ns
->parent
12166 && sym
->ns
&& sym
->ns
->parent
->proc_name
12167 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12168 module
= sym
->ns
->parent
->proc_name
->name
;
12174 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12177 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12178 gsym
->where
= sym
->declared_at
;
12179 gsym
->sym_name
= sym
->name
;
12180 gsym
->binding_label
= sym
->binding_label
;
12181 gsym
->ns
= sym
->ns
;
12182 gsym
->mod_name
= module
;
12183 if (sym
->attr
.function
)
12184 gsym
->type
= GSYM_FUNCTION
;
12185 else if (sym
->attr
.subroutine
)
12186 gsym
->type
= GSYM_SUBROUTINE
;
12187 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12188 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12192 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12194 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12195 "identifier as entity at %L", sym
->name
,
12196 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12197 /* Clear the binding label to prevent checking multiple times. */
12198 sym
->binding_label
= NULL
;
12202 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12203 && (strcmp (module
, gsym
->mod_name
) != 0
12204 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12206 /* This can only happen if the variable is defined in a module - if it
12207 isn't the same module, reject it. */
12208 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12209 "uses the same global identifier as entity at %L from module %qs",
12210 sym
->name
, module
, sym
->binding_label
,
12211 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12212 sym
->binding_label
= NULL
;
12216 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12217 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12218 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12219 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12220 && (module
!= gsym
->mod_name
12221 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12222 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12224 /* Print an error if the procedure is defined multiple times; we have to
12225 exclude references to the same procedure via module association or
12226 multiple checks for the same procedure. */
12227 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12228 "global identifier as entity at %L", sym
->name
,
12229 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12230 sym
->binding_label
= NULL
;
12235 /* Resolve an index expression. */
12238 resolve_index_expr (gfc_expr
*e
)
12240 if (!gfc_resolve_expr (e
))
12243 if (!gfc_simplify_expr (e
, 0))
12246 if (!gfc_specification_expr (e
))
12253 /* Resolve a charlen structure. */
12256 resolve_charlen (gfc_charlen
*cl
)
12259 bool saved_specification_expr
;
12265 saved_specification_expr
= specification_expr
;
12266 specification_expr
= true;
12268 if (cl
->length_from_typespec
)
12270 if (!gfc_resolve_expr (cl
->length
))
12272 specification_expr
= saved_specification_expr
;
12276 if (!gfc_simplify_expr (cl
->length
, 0))
12278 specification_expr
= saved_specification_expr
;
12282 /* cl->length has been resolved. It should have an integer type. */
12283 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12285 gfc_error ("Scalar INTEGER expression expected at %L",
12286 &cl
->length
->where
);
12292 if (!resolve_index_expr (cl
->length
))
12294 specification_expr
= saved_specification_expr
;
12299 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12300 a negative value, the length of character entities declared is zero. */
12301 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12302 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12303 gfc_replace_expr (cl
->length
,
12304 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12306 /* Check that the character length is not too large. */
12307 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12308 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12309 && cl
->length
->ts
.type
== BT_INTEGER
12310 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12312 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12313 specification_expr
= saved_specification_expr
;
12317 specification_expr
= saved_specification_expr
;
12322 /* Test for non-constant shape arrays. */
12325 is_non_constant_shape_array (gfc_symbol
*sym
)
12331 not_constant
= false;
12332 if (sym
->as
!= NULL
)
12334 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12335 has not been simplified; parameter array references. Do the
12336 simplification now. */
12337 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12339 if (i
== GFC_MAX_DIMENSIONS
)
12342 e
= sym
->as
->lower
[i
];
12343 if (e
&& (!resolve_index_expr(e
)
12344 || !gfc_is_constant_expr (e
)))
12345 not_constant
= true;
12346 e
= sym
->as
->upper
[i
];
12347 if (e
&& (!resolve_index_expr(e
)
12348 || !gfc_is_constant_expr (e
)))
12349 not_constant
= true;
12352 return not_constant
;
12355 /* Given a symbol and an initialization expression, add code to initialize
12356 the symbol to the function entry. */
12358 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12362 gfc_namespace
*ns
= sym
->ns
;
12364 /* Search for the function namespace if this is a contained
12365 function without an explicit result. */
12366 if (sym
->attr
.function
&& sym
== sym
->result
12367 && sym
->name
!= sym
->ns
->proc_name
->name
)
12369 ns
= ns
->contained
;
12370 for (;ns
; ns
= ns
->sibling
)
12371 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12377 gfc_free_expr (init
);
12381 /* Build an l-value expression for the result. */
12382 lval
= gfc_lval_expr_from_sym (sym
);
12384 /* Add the code at scope entry. */
12385 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12386 init_st
->next
= ns
->code
;
12387 ns
->code
= init_st
;
12389 /* Assign the default initializer to the l-value. */
12390 init_st
->loc
= sym
->declared_at
;
12391 init_st
->expr1
= lval
;
12392 init_st
->expr2
= init
;
12396 /* Whether or not we can generate a default initializer for a symbol. */
12399 can_generate_init (gfc_symbol
*sym
)
12401 symbol_attribute
*a
;
12406 /* These symbols should never have a default initialization. */
12411 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12412 && (CLASS_DATA (sym
)->attr
.class_pointer
12413 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12414 || a
->in_equivalence
12421 || (!a
->referenced
&& !a
->result
)
12422 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12423 || (a
->function
&& sym
!= sym
->result
)
12428 /* Assign the default initializer to a derived type variable or result. */
12431 apply_default_init (gfc_symbol
*sym
)
12433 gfc_expr
*init
= NULL
;
12435 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12438 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12439 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12441 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12444 build_init_assign (sym
, init
);
12445 sym
->attr
.referenced
= 1;
12449 /* Build an initializer for a local. Returns null if the symbol should not have
12450 a default initialization. */
12453 build_default_init_expr (gfc_symbol
*sym
)
12455 /* These symbols should never have a default initialization. */
12456 if (sym
->attr
.allocatable
12457 || sym
->attr
.external
12459 || sym
->attr
.pointer
12460 || sym
->attr
.in_equivalence
12461 || sym
->attr
.in_common
12464 || sym
->attr
.cray_pointee
12465 || sym
->attr
.cray_pointer
12469 /* Get the appropriate init expression. */
12470 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12473 /* Add an initialization expression to a local variable. */
12475 apply_default_init_local (gfc_symbol
*sym
)
12477 gfc_expr
*init
= NULL
;
12479 /* The symbol should be a variable or a function return value. */
12480 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12481 || (sym
->attr
.function
&& sym
->result
!= sym
))
12484 /* Try to build the initializer expression. If we can't initialize
12485 this symbol, then init will be NULL. */
12486 init
= build_default_init_expr (sym
);
12490 /* For saved variables, we don't want to add an initializer at function
12491 entry, so we just add a static initializer. Note that automatic variables
12492 are stack allocated even with -fno-automatic; we have also to exclude
12493 result variable, which are also nonstatic. */
12494 if (!sym
->attr
.automatic
12495 && (sym
->attr
.save
|| sym
->ns
->save_all
12496 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12497 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12498 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12500 /* Don't clobber an existing initializer! */
12501 gcc_assert (sym
->value
== NULL
);
12506 build_init_assign (sym
, init
);
12510 /* Resolution of common features of flavors variable and procedure. */
12513 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12515 gfc_array_spec
*as
;
12517 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12518 as
= CLASS_DATA (sym
)->as
;
12522 /* Constraints on deferred shape variable. */
12523 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12525 bool pointer
, allocatable
, dimension
;
12527 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12529 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12530 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12531 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12535 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12536 allocatable
= sym
->attr
.allocatable
;
12537 dimension
= sym
->attr
.dimension
;
12542 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12544 gfc_error ("Allocatable array %qs at %L must have a deferred "
12545 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12548 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12549 "%qs at %L may not be ALLOCATABLE",
12550 sym
->name
, &sym
->declared_at
))
12554 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12556 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12557 "assumed rank", sym
->name
, &sym
->declared_at
);
12563 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12564 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12566 gfc_error ("Array %qs at %L cannot have a deferred shape",
12567 sym
->name
, &sym
->declared_at
);
12572 /* Constraints on polymorphic variables. */
12573 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12576 if (sym
->attr
.class_ok
12577 && !sym
->attr
.select_type_temporary
12578 && !UNLIMITED_POLY (sym
)
12579 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12581 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12582 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12583 &sym
->declared_at
);
12588 /* Assume that use associated symbols were checked in the module ns.
12589 Class-variables that are associate-names are also something special
12590 and excepted from the test. */
12591 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12593 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12594 "or pointer", sym
->name
, &sym
->declared_at
);
12603 /* Additional checks for symbols with flavor variable and derived
12604 type. To be called from resolve_fl_variable. */
12607 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12609 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12611 /* Check to see if a derived type is blocked from being host
12612 associated by the presence of another class I symbol in the same
12613 namespace. 14.6.1.3 of the standard and the discussion on
12614 comp.lang.fortran. */
12615 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12616 && !sym
->ts
.u
.derived
->attr
.use_assoc
12617 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12620 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12621 if (s
&& s
->attr
.generic
)
12622 s
= gfc_find_dt_in_generic (s
);
12623 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12625 gfc_error ("The type %qs cannot be host associated at %L "
12626 "because it is blocked by an incompatible object "
12627 "of the same name declared at %L",
12628 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12634 /* 4th constraint in section 11.3: "If an object of a type for which
12635 component-initialization is specified (R429) appears in the
12636 specification-part of a module and does not have the ALLOCATABLE
12637 or POINTER attribute, the object shall have the SAVE attribute."
12639 The check for initializers is performed with
12640 gfc_has_default_initializer because gfc_default_initializer generates
12641 a hidden default for allocatable components. */
12642 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12643 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12644 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12645 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12646 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12647 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12648 "%qs at %L, needed due to the default "
12649 "initialization", sym
->name
, &sym
->declared_at
))
12652 /* Assign default initializer. */
12653 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12654 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12655 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12661 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12662 except in the declaration of an entity or component that has the POINTER
12663 or ALLOCATABLE attribute. */
12666 deferred_requirements (gfc_symbol
*sym
)
12668 if (sym
->ts
.deferred
12669 && !(sym
->attr
.pointer
12670 || sym
->attr
.allocatable
12671 || sym
->attr
.associate_var
12672 || sym
->attr
.omp_udr_artificial_var
))
12674 /* If a function has a result variable, only check the variable. */
12675 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12678 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12679 "requires either the POINTER or ALLOCATABLE attribute",
12680 sym
->name
, &sym
->declared_at
);
12687 /* Resolve symbols with flavor variable. */
12690 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12692 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12695 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12698 /* Set this flag to check that variables are parameters of all entries.
12699 This check is effected by the call to gfc_resolve_expr through
12700 is_non_constant_shape_array. */
12701 bool saved_specification_expr
= specification_expr
;
12702 specification_expr
= true;
12704 if (sym
->ns
->proc_name
12705 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12706 || sym
->ns
->proc_name
->attr
.is_main_program
)
12707 && !sym
->attr
.use_assoc
12708 && !sym
->attr
.allocatable
12709 && !sym
->attr
.pointer
12710 && is_non_constant_shape_array (sym
))
12712 /* F08:C541. The shape of an array defined in a main program or module
12713 * needs to be constant. */
12714 gfc_error ("The module or main program array %qs at %L must "
12715 "have constant shape", sym
->name
, &sym
->declared_at
);
12716 specification_expr
= saved_specification_expr
;
12720 /* Constraints on deferred type parameter. */
12721 if (!deferred_requirements (sym
))
12724 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12726 /* Make sure that character string variables with assumed length are
12727 dummy arguments. */
12728 gfc_expr
*e
= NULL
;
12731 e
= sym
->ts
.u
.cl
->length
;
12735 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12736 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12737 && !sym
->attr
.omp_udr_artificial_var
)
12739 gfc_error ("Entity with assumed character length at %L must be a "
12740 "dummy argument or a PARAMETER", &sym
->declared_at
);
12741 specification_expr
= saved_specification_expr
;
12745 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12747 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12748 specification_expr
= saved_specification_expr
;
12752 if (!gfc_is_constant_expr (e
)
12753 && !(e
->expr_type
== EXPR_VARIABLE
12754 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12756 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12757 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12758 || sym
->ns
->proc_name
->attr
.is_main_program
))
12760 gfc_error ("%qs at %L must have constant character length "
12761 "in this context", sym
->name
, &sym
->declared_at
);
12762 specification_expr
= saved_specification_expr
;
12765 if (sym
->attr
.in_common
)
12767 gfc_error ("COMMON variable %qs at %L must have constant "
12768 "character length", sym
->name
, &sym
->declared_at
);
12769 specification_expr
= saved_specification_expr
;
12775 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12776 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12778 /* Determine if the symbol may not have an initializer. */
12779 int no_init_flag
= 0, automatic_flag
= 0;
12780 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12781 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12783 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12784 && is_non_constant_shape_array (sym
))
12786 no_init_flag
= automatic_flag
= 1;
12788 /* Also, they must not have the SAVE attribute.
12789 SAVE_IMPLICIT is checked below. */
12790 if (sym
->as
&& sym
->attr
.codimension
)
12792 int corank
= sym
->as
->corank
;
12793 sym
->as
->corank
= 0;
12794 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12795 sym
->as
->corank
= corank
;
12797 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12799 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12800 specification_expr
= saved_specification_expr
;
12805 /* Ensure that any initializer is simplified. */
12807 gfc_simplify_expr (sym
->value
, 1);
12809 /* Reject illegal initializers. */
12810 if (!sym
->mark
&& sym
->value
)
12812 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12813 && CLASS_DATA (sym
)->attr
.allocatable
))
12814 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12815 sym
->name
, &sym
->declared_at
);
12816 else if (sym
->attr
.external
)
12817 gfc_error ("External %qs at %L cannot have an initializer",
12818 sym
->name
, &sym
->declared_at
);
12819 else if (sym
->attr
.dummy
12820 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12821 gfc_error ("Dummy %qs at %L cannot have an initializer",
12822 sym
->name
, &sym
->declared_at
);
12823 else if (sym
->attr
.intrinsic
)
12824 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12825 sym
->name
, &sym
->declared_at
);
12826 else if (sym
->attr
.result
)
12827 gfc_error ("Function result %qs at %L cannot have an initializer",
12828 sym
->name
, &sym
->declared_at
);
12829 else if (automatic_flag
)
12830 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12831 sym
->name
, &sym
->declared_at
);
12833 goto no_init_error
;
12834 specification_expr
= saved_specification_expr
;
12839 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12841 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12842 specification_expr
= saved_specification_expr
;
12846 specification_expr
= saved_specification_expr
;
12851 /* Compare the dummy characteristics of a module procedure interface
12852 declaration with the corresponding declaration in a submodule. */
12853 static gfc_formal_arglist
*new_formal
;
12854 static char errmsg
[200];
12857 compare_fsyms (gfc_symbol
*sym
)
12861 if (sym
== NULL
|| new_formal
== NULL
)
12864 fsym
= new_formal
->sym
;
12869 if (strcmp (sym
->name
, fsym
->name
) == 0)
12871 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12872 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12877 /* Resolve a procedure. */
12880 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12882 gfc_formal_arglist
*arg
;
12884 if (sym
->attr
.function
12885 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12888 /* Constraints on deferred type parameter. */
12889 if (!deferred_requirements (sym
))
12892 if (sym
->ts
.type
== BT_CHARACTER
)
12894 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12896 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12897 && !resolve_charlen (cl
))
12900 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12901 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12903 gfc_error ("Character-valued statement function %qs at %L must "
12904 "have constant length", sym
->name
, &sym
->declared_at
);
12909 /* Ensure that derived type for are not of a private type. Internal
12910 module procedures are excluded by 2.2.3.3 - i.e., they are not
12911 externally accessible and can access all the objects accessible in
12913 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12914 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12915 && gfc_check_symbol_access (sym
))
12917 gfc_interface
*iface
;
12919 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12922 && arg
->sym
->ts
.type
== BT_DERIVED
12923 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12924 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12925 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12926 "and cannot be a dummy argument"
12927 " of %qs, which is PUBLIC at %L",
12928 arg
->sym
->name
, sym
->name
,
12929 &sym
->declared_at
))
12931 /* Stop this message from recurring. */
12932 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12937 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12938 PRIVATE to the containing module. */
12939 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12941 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12944 && arg
->sym
->ts
.type
== BT_DERIVED
12945 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12946 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12947 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12948 "PUBLIC interface %qs at %L "
12949 "takes dummy arguments of %qs which "
12950 "is PRIVATE", iface
->sym
->name
,
12951 sym
->name
, &iface
->sym
->declared_at
,
12952 gfc_typename(&arg
->sym
->ts
)))
12954 /* Stop this message from recurring. */
12955 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12962 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12963 && !sym
->attr
.proc_pointer
)
12965 gfc_error ("Function %qs at %L cannot have an initializer",
12966 sym
->name
, &sym
->declared_at
);
12968 /* Make sure no second error is issued for this. */
12969 sym
->value
->error
= 1;
12973 /* An external symbol may not have an initializer because it is taken to be
12974 a procedure. Exception: Procedure Pointers. */
12975 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12977 gfc_error ("External object %qs at %L may not have an initializer",
12978 sym
->name
, &sym
->declared_at
);
12982 /* An elemental function is required to return a scalar 12.7.1 */
12983 if (sym
->attr
.elemental
&& sym
->attr
.function
12984 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12986 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12987 "result", sym
->name
, &sym
->declared_at
);
12988 /* Reset so that the error only occurs once. */
12989 sym
->attr
.elemental
= 0;
12993 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12994 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12996 gfc_error ("Statement function %qs at %L may not have pointer or "
12997 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13001 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13002 char-len-param shall not be array-valued, pointer-valued, recursive
13003 or pure. ....snip... A character value of * may only be used in the
13004 following ways: (i) Dummy arg of procedure - dummy associates with
13005 actual length; (ii) To declare a named constant; or (iii) External
13006 function - but length must be declared in calling scoping unit. */
13007 if (sym
->attr
.function
13008 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13009 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13011 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13012 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13014 if (sym
->as
&& sym
->as
->rank
)
13015 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13016 "array-valued", sym
->name
, &sym
->declared_at
);
13018 if (sym
->attr
.pointer
)
13019 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13020 "pointer-valued", sym
->name
, &sym
->declared_at
);
13022 if (sym
->attr
.pure
)
13023 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13024 "pure", sym
->name
, &sym
->declared_at
);
13026 if (sym
->attr
.recursive
)
13027 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13028 "recursive", sym
->name
, &sym
->declared_at
);
13033 /* Appendix B.2 of the standard. Contained functions give an
13034 error anyway. Deferred character length is an F2003 feature.
13035 Don't warn on intrinsic conversion functions, which start
13036 with two underscores. */
13037 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13038 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13039 gfc_notify_std (GFC_STD_F95_OBS
,
13040 "CHARACTER(*) function %qs at %L",
13041 sym
->name
, &sym
->declared_at
);
13044 /* F2008, C1218. */
13045 if (sym
->attr
.elemental
)
13047 if (sym
->attr
.proc_pointer
)
13049 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13050 sym
->name
, &sym
->declared_at
);
13053 if (sym
->attr
.dummy
)
13055 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13056 sym
->name
, &sym
->declared_at
);
13061 /* F2018, C15100: "The result of an elemental function shall be scalar,
13062 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13063 pointer is tested and caught elsewhere. */
13064 if (sym
->attr
.elemental
&& sym
->result
13065 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13067 gfc_error ("Function result variable %qs at %L of elemental "
13068 "function %qs shall not have an ALLOCATABLE or POINTER "
13069 "attribute", sym
->result
->name
,
13070 &sym
->result
->declared_at
, sym
->name
);
13074 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13076 gfc_formal_arglist
*curr_arg
;
13077 int has_non_interop_arg
= 0;
13079 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13080 sym
->common_block
))
13082 /* Clear these to prevent looking at them again if there was an
13084 sym
->attr
.is_bind_c
= 0;
13085 sym
->attr
.is_c_interop
= 0;
13086 sym
->ts
.is_c_interop
= 0;
13090 /* So far, no errors have been found. */
13091 sym
->attr
.is_c_interop
= 1;
13092 sym
->ts
.is_c_interop
= 1;
13095 curr_arg
= gfc_sym_get_dummy_args (sym
);
13096 while (curr_arg
!= NULL
)
13098 /* Skip implicitly typed dummy args here. */
13099 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13100 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13101 /* If something is found to fail, record the fact so we
13102 can mark the symbol for the procedure as not being
13103 BIND(C) to try and prevent multiple errors being
13105 has_non_interop_arg
= 1;
13107 curr_arg
= curr_arg
->next
;
13110 /* See if any of the arguments were not interoperable and if so, clear
13111 the procedure symbol to prevent duplicate error messages. */
13112 if (has_non_interop_arg
!= 0)
13114 sym
->attr
.is_c_interop
= 0;
13115 sym
->ts
.is_c_interop
= 0;
13116 sym
->attr
.is_bind_c
= 0;
13120 if (!sym
->attr
.proc_pointer
)
13122 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13124 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13125 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13128 if (sym
->attr
.intent
)
13130 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13131 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13134 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13136 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13137 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13140 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13141 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13142 || sym
->attr
.contained
))
13144 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13145 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13148 if (strcmp ("ppr@", sym
->name
) == 0)
13150 gfc_error ("Procedure pointer result %qs at %L "
13151 "is missing the pointer attribute",
13152 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13157 /* Assume that a procedure whose body is not known has references
13158 to external arrays. */
13159 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13160 sym
->attr
.array_outer_dependency
= 1;
13162 /* Compare the characteristics of a module procedure with the
13163 interface declaration. Ideally this would be done with
13164 gfc_compare_interfaces but, at present, the formal interface
13165 cannot be copied to the ts.interface. */
13166 if (sym
->attr
.module_procedure
13167 && sym
->attr
.if_source
== IFSRC_DECL
)
13170 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13172 char *submodule_name
;
13173 strcpy (name
, sym
->ns
->proc_name
->name
);
13174 module_name
= strtok (name
, ".");
13175 submodule_name
= strtok (NULL
, ".");
13177 iface
= sym
->tlink
;
13180 /* Make sure that the result uses the correct charlen for deferred
13182 if (iface
&& sym
->result
13183 && iface
->ts
.type
== BT_CHARACTER
13184 && iface
->ts
.deferred
)
13185 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13190 /* Check the procedure characteristics. */
13191 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13193 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13194 "PROCEDURE at %L and its interface in %s",
13195 &sym
->declared_at
, module_name
);
13199 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13201 gfc_error ("Mismatch in PURE attribute between MODULE "
13202 "PROCEDURE at %L and its interface in %s",
13203 &sym
->declared_at
, module_name
);
13207 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13209 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13210 "PROCEDURE at %L and its interface in %s",
13211 &sym
->declared_at
, module_name
);
13215 /* Check the result characteristics. */
13216 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13218 gfc_error ("%s between the MODULE PROCEDURE declaration "
13219 "in MODULE %qs and the declaration at %L in "
13221 errmsg
, module_name
, &sym
->declared_at
,
13222 submodule_name
? submodule_name
: module_name
);
13227 /* Check the characteristics of the formal arguments. */
13228 if (sym
->formal
&& sym
->formal_ns
)
13230 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13233 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13241 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13242 been defined and we now know their defined arguments, check that they fulfill
13243 the requirements of the standard for procedures used as finalizers. */
13246 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13248 gfc_finalizer
* list
;
13249 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13250 bool result
= true;
13251 bool seen_scalar
= false;
13254 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13257 gfc_resolve_finalizers (parent
, finalizable
);
13259 /* Ensure that derived-type components have a their finalizers resolved. */
13260 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13261 for (c
= derived
->components
; c
; c
= c
->next
)
13262 if (c
->ts
.type
== BT_DERIVED
13263 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13265 bool has_final2
= false;
13266 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13267 return false; /* Error. */
13268 has_final
= has_final
|| has_final2
;
13270 /* Return early if not finalizable. */
13274 *finalizable
= false;
13278 /* Walk over the list of finalizer-procedures, check them, and if any one
13279 does not fit in with the standard's definition, print an error and remove
13280 it from the list. */
13281 prev_link
= &derived
->f2k_derived
->finalizers
;
13282 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13284 gfc_formal_arglist
*dummy_args
;
13289 /* Skip this finalizer if we already resolved it. */
13290 if (list
->proc_tree
)
13292 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13293 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13294 seen_scalar
= true;
13295 prev_link
= &(list
->next
);
13299 /* Check this exists and is a SUBROUTINE. */
13300 if (!list
->proc_sym
->attr
.subroutine
)
13302 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13303 list
->proc_sym
->name
, &list
->where
);
13307 /* We should have exactly one argument. */
13308 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13309 if (!dummy_args
|| dummy_args
->next
)
13311 gfc_error ("FINAL procedure at %L must have exactly one argument",
13315 arg
= dummy_args
->sym
;
13317 /* This argument must be of our type. */
13318 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13320 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13321 &arg
->declared_at
, derived
->name
);
13325 /* It must neither be a pointer nor allocatable nor optional. */
13326 if (arg
->attr
.pointer
)
13328 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13329 &arg
->declared_at
);
13332 if (arg
->attr
.allocatable
)
13334 gfc_error ("Argument of FINAL procedure at %L must not be"
13335 " ALLOCATABLE", &arg
->declared_at
);
13338 if (arg
->attr
.optional
)
13340 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13341 &arg
->declared_at
);
13345 /* It must not be INTENT(OUT). */
13346 if (arg
->attr
.intent
== INTENT_OUT
)
13348 gfc_error ("Argument of FINAL procedure at %L must not be"
13349 " INTENT(OUT)", &arg
->declared_at
);
13353 /* Warn if the procedure is non-scalar and not assumed shape. */
13354 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13355 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13356 gfc_warning (OPT_Wsurprising
,
13357 "Non-scalar FINAL procedure at %L should have assumed"
13358 " shape argument", &arg
->declared_at
);
13360 /* Check that it does not match in kind and rank with a FINAL procedure
13361 defined earlier. To really loop over the *earlier* declarations,
13362 we need to walk the tail of the list as new ones were pushed at the
13364 /* TODO: Handle kind parameters once they are implemented. */
13365 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13366 for (i
= list
->next
; i
; i
= i
->next
)
13368 gfc_formal_arglist
*dummy_args
;
13370 /* Argument list might be empty; that is an error signalled earlier,
13371 but we nevertheless continued resolving. */
13372 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13375 gfc_symbol
* i_arg
= dummy_args
->sym
;
13376 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13377 if (i_rank
== my_rank
)
13379 gfc_error ("FINAL procedure %qs declared at %L has the same"
13380 " rank (%d) as %qs",
13381 list
->proc_sym
->name
, &list
->where
, my_rank
,
13382 i
->proc_sym
->name
);
13388 /* Is this the/a scalar finalizer procedure? */
13390 seen_scalar
= true;
13392 /* Find the symtree for this procedure. */
13393 gcc_assert (!list
->proc_tree
);
13394 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13396 prev_link
= &list
->next
;
13399 /* Remove wrong nodes immediately from the list so we don't risk any
13400 troubles in the future when they might fail later expectations. */
13403 *prev_link
= list
->next
;
13404 gfc_free_finalizer (i
);
13408 if (result
== false)
13411 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13412 were nodes in the list, must have been for arrays. It is surely a good
13413 idea to have a scalar version there if there's something to finalize. */
13414 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13415 gfc_warning (OPT_Wsurprising
,
13416 "Only array FINAL procedures declared for derived type %qs"
13417 " defined at %L, suggest also scalar one",
13418 derived
->name
, &derived
->declared_at
);
13420 vtab
= gfc_find_derived_vtab (derived
);
13421 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13422 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13425 *finalizable
= true;
13431 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13434 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13435 const char* generic_name
, locus where
)
13437 gfc_symbol
*sym1
, *sym2
;
13438 const char *pass1
, *pass2
;
13439 gfc_formal_arglist
*dummy_args
;
13441 gcc_assert (t1
->specific
&& t2
->specific
);
13442 gcc_assert (!t1
->specific
->is_generic
);
13443 gcc_assert (!t2
->specific
->is_generic
);
13444 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13446 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13447 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13452 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13453 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13454 || sym1
->attr
.function
!= sym2
->attr
.function
)
13456 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13457 " GENERIC %qs at %L",
13458 sym1
->name
, sym2
->name
, generic_name
, &where
);
13462 /* Determine PASS arguments. */
13463 if (t1
->specific
->nopass
)
13465 else if (t1
->specific
->pass_arg
)
13466 pass1
= t1
->specific
->pass_arg
;
13469 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13471 pass1
= dummy_args
->sym
->name
;
13475 if (t2
->specific
->nopass
)
13477 else if (t2
->specific
->pass_arg
)
13478 pass2
= t2
->specific
->pass_arg
;
13481 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13483 pass2
= dummy_args
->sym
->name
;
13488 /* Compare the interfaces. */
13489 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13490 NULL
, 0, pass1
, pass2
))
13492 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13493 sym1
->name
, sym2
->name
, generic_name
, &where
);
13501 /* Worker function for resolving a generic procedure binding; this is used to
13502 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13504 The difference between those cases is finding possible inherited bindings
13505 that are overridden, as one has to look for them in tb_sym_root,
13506 tb_uop_root or tb_op, respectively. Thus the caller must already find
13507 the super-type and set p->overridden correctly. */
13510 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13511 gfc_typebound_proc
* p
, const char* name
)
13513 gfc_tbp_generic
* target
;
13514 gfc_symtree
* first_target
;
13515 gfc_symtree
* inherited
;
13517 gcc_assert (p
&& p
->is_generic
);
13519 /* Try to find the specific bindings for the symtrees in our target-list. */
13520 gcc_assert (p
->u
.generic
);
13521 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13522 if (!target
->specific
)
13524 gfc_typebound_proc
* overridden_tbp
;
13525 gfc_tbp_generic
* g
;
13526 const char* target_name
;
13528 target_name
= target
->specific_st
->name
;
13530 /* Defined for this type directly. */
13531 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13533 target
->specific
= target
->specific_st
->n
.tb
;
13534 goto specific_found
;
13537 /* Look for an inherited specific binding. */
13540 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13545 gcc_assert (inherited
->n
.tb
);
13546 target
->specific
= inherited
->n
.tb
;
13547 goto specific_found
;
13551 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13552 " at %L", target_name
, name
, &p
->where
);
13555 /* Once we've found the specific binding, check it is not ambiguous with
13556 other specifics already found or inherited for the same GENERIC. */
13558 gcc_assert (target
->specific
);
13560 /* This must really be a specific binding! */
13561 if (target
->specific
->is_generic
)
13563 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13564 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13568 /* Check those already resolved on this type directly. */
13569 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13570 if (g
!= target
&& g
->specific
13571 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13574 /* Check for ambiguity with inherited specific targets. */
13575 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13576 overridden_tbp
= overridden_tbp
->overridden
)
13577 if (overridden_tbp
->is_generic
)
13579 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13581 gcc_assert (g
->specific
);
13582 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13588 /* If we attempt to "overwrite" a specific binding, this is an error. */
13589 if (p
->overridden
&& !p
->overridden
->is_generic
)
13591 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13592 " the same name", name
, &p
->where
);
13596 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13597 all must have the same attributes here. */
13598 first_target
= p
->u
.generic
->specific
->u
.specific
;
13599 gcc_assert (first_target
);
13600 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13601 p
->function
= first_target
->n
.sym
->attr
.function
;
13607 /* Resolve a GENERIC procedure binding for a derived type. */
13610 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13612 gfc_symbol
* super_type
;
13614 /* Find the overridden binding if any. */
13615 st
->n
.tb
->overridden
= NULL
;
13616 super_type
= gfc_get_derived_super_type (derived
);
13619 gfc_symtree
* overridden
;
13620 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13623 if (overridden
&& overridden
->n
.tb
)
13624 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13627 /* Resolve using worker function. */
13628 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13632 /* Retrieve the target-procedure of an operator binding and do some checks in
13633 common for intrinsic and user-defined type-bound operators. */
13636 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13638 gfc_symbol
* target_proc
;
13640 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13641 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13642 gcc_assert (target_proc
);
13644 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13645 if (target
->specific
->nopass
)
13647 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13651 return target_proc
;
13655 /* Resolve a type-bound intrinsic operator. */
13658 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13659 gfc_typebound_proc
* p
)
13661 gfc_symbol
* super_type
;
13662 gfc_tbp_generic
* target
;
13664 /* If there's already an error here, do nothing (but don't fail again). */
13668 /* Operators should always be GENERIC bindings. */
13669 gcc_assert (p
->is_generic
);
13671 /* Look for an overridden binding. */
13672 super_type
= gfc_get_derived_super_type (derived
);
13673 if (super_type
&& super_type
->f2k_derived
)
13674 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13677 p
->overridden
= NULL
;
13679 /* Resolve general GENERIC properties using worker function. */
13680 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13683 /* Check the targets to be procedures of correct interface. */
13684 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13686 gfc_symbol
* target_proc
;
13688 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13692 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13695 /* Add target to non-typebound operator list. */
13696 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13697 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13699 gfc_interface
*head
, *intr
;
13701 /* Preempt 'gfc_check_new_interface' for submodules, where the
13702 mechanism for handling module procedures winds up resolving
13703 operator interfaces twice and would otherwise cause an error. */
13704 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13705 if (intr
->sym
== target_proc
13706 && target_proc
->attr
.used_in_submodule
)
13709 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13710 target_proc
, p
->where
))
13712 head
= derived
->ns
->op
[op
];
13713 intr
= gfc_get_interface ();
13714 intr
->sym
= target_proc
;
13715 intr
->where
= p
->where
;
13717 derived
->ns
->op
[op
] = intr
;
13729 /* Resolve a type-bound user operator (tree-walker callback). */
13731 static gfc_symbol
* resolve_bindings_derived
;
13732 static bool resolve_bindings_result
;
13734 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13737 resolve_typebound_user_op (gfc_symtree
* stree
)
13739 gfc_symbol
* super_type
;
13740 gfc_tbp_generic
* target
;
13742 gcc_assert (stree
&& stree
->n
.tb
);
13744 if (stree
->n
.tb
->error
)
13747 /* Operators should always be GENERIC bindings. */
13748 gcc_assert (stree
->n
.tb
->is_generic
);
13750 /* Find overridden procedure, if any. */
13751 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13752 if (super_type
&& super_type
->f2k_derived
)
13754 gfc_symtree
* overridden
;
13755 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13756 stree
->name
, true, NULL
);
13758 if (overridden
&& overridden
->n
.tb
)
13759 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13762 stree
->n
.tb
->overridden
= NULL
;
13764 /* Resolve basically using worker function. */
13765 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13768 /* Check the targets to be functions of correct interface. */
13769 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13771 gfc_symbol
* target_proc
;
13773 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13777 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13784 resolve_bindings_result
= false;
13785 stree
->n
.tb
->error
= 1;
13789 /* Resolve the type-bound procedures for a derived type. */
13792 resolve_typebound_procedure (gfc_symtree
* stree
)
13796 gfc_symbol
* me_arg
;
13797 gfc_symbol
* super_type
;
13798 gfc_component
* comp
;
13800 gcc_assert (stree
);
13802 /* Undefined specific symbol from GENERIC target definition. */
13806 if (stree
->n
.tb
->error
)
13809 /* If this is a GENERIC binding, use that routine. */
13810 if (stree
->n
.tb
->is_generic
)
13812 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13817 /* Get the target-procedure to check it. */
13818 gcc_assert (!stree
->n
.tb
->is_generic
);
13819 gcc_assert (stree
->n
.tb
->u
.specific
);
13820 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13821 where
= stree
->n
.tb
->where
;
13823 /* Default access should already be resolved from the parser. */
13824 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13826 if (stree
->n
.tb
->deferred
)
13828 if (!check_proc_interface (proc
, &where
))
13833 /* If proc has not been resolved at this point, proc->name may
13834 actually be a USE associated entity. See PR fortran/89647. */
13835 if (!proc
->resolved
13836 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13839 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13840 if (tmp
&& tmp
->attr
.use_assoc
)
13842 proc
->module
= tmp
->module
;
13843 proc
->attr
.proc
= tmp
->attr
.proc
;
13844 proc
->attr
.function
= tmp
->attr
.function
;
13845 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13846 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13847 proc
->ts
= tmp
->ts
;
13848 proc
->result
= tmp
->result
;
13852 /* Check for F08:C465. */
13853 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13854 || (proc
->attr
.proc
!= PROC_MODULE
13855 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13856 || proc
->attr
.abstract
)
13858 gfc_error ("%qs must be a module procedure or an external "
13859 "procedure with an explicit interface at %L",
13860 proc
->name
, &where
);
13865 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13866 stree
->n
.tb
->function
= proc
->attr
.function
;
13868 /* Find the super-type of the current derived type. We could do this once and
13869 store in a global if speed is needed, but as long as not I believe this is
13870 more readable and clearer. */
13871 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13873 /* If PASS, resolve and check arguments if not already resolved / loaded
13874 from a .mod file. */
13875 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13877 gfc_formal_arglist
*dummy_args
;
13879 dummy_args
= gfc_sym_get_dummy_args (proc
);
13880 if (stree
->n
.tb
->pass_arg
)
13882 gfc_formal_arglist
*i
;
13884 /* If an explicit passing argument name is given, walk the arg-list
13885 and look for it. */
13888 stree
->n
.tb
->pass_arg_num
= 1;
13889 for (i
= dummy_args
; i
; i
= i
->next
)
13891 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13896 ++stree
->n
.tb
->pass_arg_num
;
13901 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13903 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13904 stree
->n
.tb
->pass_arg
);
13910 /* Otherwise, take the first one; there should in fact be at least
13912 stree
->n
.tb
->pass_arg_num
= 1;
13915 gfc_error ("Procedure %qs with PASS at %L must have at"
13916 " least one argument", proc
->name
, &where
);
13919 me_arg
= dummy_args
->sym
;
13922 /* Now check that the argument-type matches and the passed-object
13923 dummy argument is generally fine. */
13925 gcc_assert (me_arg
);
13927 if (me_arg
->ts
.type
!= BT_CLASS
)
13929 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13930 " at %L", proc
->name
, &where
);
13934 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13935 != resolve_bindings_derived
)
13937 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13938 " the derived-type %qs", me_arg
->name
, proc
->name
,
13939 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13943 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13944 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13946 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13947 " scalar", proc
->name
, &where
);
13950 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13952 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13953 " be ALLOCATABLE", proc
->name
, &where
);
13956 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13958 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13959 " be POINTER", proc
->name
, &where
);
13964 /* If we are extending some type, check that we don't override a procedure
13965 flagged NON_OVERRIDABLE. */
13966 stree
->n
.tb
->overridden
= NULL
;
13969 gfc_symtree
* overridden
;
13970 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13971 stree
->name
, true, NULL
);
13975 if (overridden
->n
.tb
)
13976 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13978 if (!gfc_check_typebound_override (stree
, overridden
))
13983 /* See if there's a name collision with a component directly in this type. */
13984 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13985 if (!strcmp (comp
->name
, stree
->name
))
13987 gfc_error ("Procedure %qs at %L has the same name as a component of"
13989 stree
->name
, &where
, resolve_bindings_derived
->name
);
13993 /* Try to find a name collision with an inherited component. */
13994 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13997 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13998 " component of %qs",
13999 stree
->name
, &where
, resolve_bindings_derived
->name
);
14003 stree
->n
.tb
->error
= 0;
14007 resolve_bindings_result
= false;
14008 stree
->n
.tb
->error
= 1;
14013 resolve_typebound_procedures (gfc_symbol
* derived
)
14016 gfc_symbol
* super_type
;
14018 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14021 super_type
= gfc_get_derived_super_type (derived
);
14023 resolve_symbol (super_type
);
14025 resolve_bindings_derived
= derived
;
14026 resolve_bindings_result
= true;
14028 if (derived
->f2k_derived
->tb_sym_root
)
14029 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14030 &resolve_typebound_procedure
);
14032 if (derived
->f2k_derived
->tb_uop_root
)
14033 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14034 &resolve_typebound_user_op
);
14036 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14038 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14039 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14040 (gfc_intrinsic_op
)op
, p
))
14041 resolve_bindings_result
= false;
14044 return resolve_bindings_result
;
14048 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14049 to give all identical derived types the same backend_decl. */
14051 add_dt_to_dt_list (gfc_symbol
*derived
)
14053 if (!derived
->dt_next
)
14055 if (gfc_derived_types
)
14057 derived
->dt_next
= gfc_derived_types
->dt_next
;
14058 gfc_derived_types
->dt_next
= derived
;
14062 derived
->dt_next
= derived
;
14064 gfc_derived_types
= derived
;
14069 /* Ensure that a derived-type is really not abstract, meaning that every
14070 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14073 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14078 if (!ensure_not_abstract_walker (sub
, st
->left
))
14080 if (!ensure_not_abstract_walker (sub
, st
->right
))
14083 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14085 gfc_symtree
* overriding
;
14086 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14089 gcc_assert (overriding
->n
.tb
);
14090 if (overriding
->n
.tb
->deferred
)
14092 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14093 " %qs is DEFERRED and not overridden",
14094 sub
->name
, &sub
->declared_at
, st
->name
);
14103 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14105 /* The algorithm used here is to recursively travel up the ancestry of sub
14106 and for each ancestor-type, check all bindings. If any of them is
14107 DEFERRED, look it up starting from sub and see if the found (overriding)
14108 binding is not DEFERRED.
14109 This is not the most efficient way to do this, but it should be ok and is
14110 clearer than something sophisticated. */
14112 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14114 if (!ancestor
->attr
.abstract
)
14117 /* Walk bindings of this ancestor. */
14118 if (ancestor
->f2k_derived
)
14121 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14126 /* Find next ancestor type and recurse on it. */
14127 ancestor
= gfc_get_derived_super_type (ancestor
);
14129 return ensure_not_abstract (sub
, ancestor
);
14135 /* This check for typebound defined assignments is done recursively
14136 since the order in which derived types are resolved is not always in
14137 order of the declarations. */
14140 check_defined_assignments (gfc_symbol
*derived
)
14144 for (c
= derived
->components
; c
; c
= c
->next
)
14146 if (!gfc_bt_struct (c
->ts
.type
)
14148 || c
->attr
.allocatable
14149 || c
->attr
.proc_pointer_comp
14150 || c
->attr
.class_pointer
14151 || c
->attr
.proc_pointer
)
14154 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14155 || (c
->ts
.u
.derived
->f2k_derived
14156 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14158 derived
->attr
.defined_assign_comp
= 1;
14162 check_defined_assignments (c
->ts
.u
.derived
);
14163 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14165 derived
->attr
.defined_assign_comp
= 1;
14172 /* Resolve a single component of a derived type or structure. */
14175 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14177 gfc_symbol
*super_type
;
14178 symbol_attribute
*attr
;
14180 if (c
->attr
.artificial
)
14183 /* Do not allow vtype components to be resolved in nameless namespaces
14184 such as block data because the procedure pointers will cause ICEs
14185 and vtables are not needed in these contexts. */
14186 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14187 && sym
->ns
->proc_name
== NULL
)
14191 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14192 && c
->attr
.codimension
14193 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14195 gfc_error ("Coarray component %qs at %L must be allocatable with "
14196 "deferred shape", c
->name
, &c
->loc
);
14201 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14202 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14204 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14205 "shall not be a coarray", c
->name
, &c
->loc
);
14210 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14211 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14212 || c
->attr
.allocatable
))
14214 gfc_error ("Component %qs at %L with coarray component "
14215 "shall be a nonpointer, nonallocatable scalar",
14221 if (c
->ts
.type
== BT_CLASS
)
14223 if (CLASS_DATA (c
))
14225 attr
= &(CLASS_DATA (c
)->attr
);
14227 /* Fix up contiguous attribute. */
14228 if (c
->attr
.contiguous
)
14229 attr
->contiguous
= 1;
14237 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14239 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14240 "is not an array pointer", c
->name
, &c
->loc
);
14244 /* F2003, 15.2.1 - length has to be one. */
14245 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14246 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14247 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14248 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14250 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14255 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14257 gfc_symbol
*ifc
= c
->ts
.interface
;
14259 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14265 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14267 /* Resolve interface and copy attributes. */
14268 if (ifc
->formal
&& !ifc
->formal_ns
)
14269 resolve_symbol (ifc
);
14270 if (ifc
->attr
.intrinsic
)
14271 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14275 c
->ts
= ifc
->result
->ts
;
14276 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14277 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14278 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14279 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14280 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14285 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14286 c
->attr
.pointer
= ifc
->attr
.pointer
;
14287 c
->attr
.dimension
= ifc
->attr
.dimension
;
14288 c
->as
= gfc_copy_array_spec (ifc
->as
);
14289 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14291 c
->ts
.interface
= ifc
;
14292 c
->attr
.function
= ifc
->attr
.function
;
14293 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14295 c
->attr
.pure
= ifc
->attr
.pure
;
14296 c
->attr
.elemental
= ifc
->attr
.elemental
;
14297 c
->attr
.recursive
= ifc
->attr
.recursive
;
14298 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14299 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14300 /* Copy char length. */
14301 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14303 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14304 if (cl
->length
&& !cl
->resolved
14305 && !gfc_resolve_expr (cl
->length
))
14314 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14316 /* Since PPCs are not implicitly typed, a PPC without an explicit
14317 interface must be a subroutine. */
14318 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14321 /* Procedure pointer components: Check PASS arg. */
14322 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14323 && !sym
->attr
.vtype
)
14325 gfc_symbol
* me_arg
;
14327 if (c
->tb
->pass_arg
)
14329 gfc_formal_arglist
* i
;
14331 /* If an explicit passing argument name is given, walk the arg-list
14332 and look for it. */
14335 c
->tb
->pass_arg_num
= 1;
14336 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14338 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14343 c
->tb
->pass_arg_num
++;
14348 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14349 "at %L has no argument %qs", c
->name
,
14350 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14357 /* Otherwise, take the first one; there should in fact be at least
14359 c
->tb
->pass_arg_num
= 1;
14360 if (!c
->ts
.interface
->formal
)
14362 gfc_error ("Procedure pointer component %qs with PASS at %L "
14363 "must have at least one argument",
14368 me_arg
= c
->ts
.interface
->formal
->sym
;
14371 /* Now check that the argument-type matches. */
14372 gcc_assert (me_arg
);
14373 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14374 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14375 || (me_arg
->ts
.type
== BT_CLASS
14376 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14378 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14379 " the derived type %qs", me_arg
->name
, c
->name
,
14380 me_arg
->name
, &c
->loc
, sym
->name
);
14385 /* Check for F03:C453. */
14386 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14388 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14389 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14395 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14397 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14398 "may not have the POINTER attribute", me_arg
->name
,
14399 c
->name
, me_arg
->name
, &c
->loc
);
14404 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14406 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14407 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14408 me_arg
->name
, &c
->loc
);
14413 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14415 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14416 " at %L", c
->name
, &c
->loc
);
14422 /* Check type-spec if this is not the parent-type component. */
14423 if (((sym
->attr
.is_class
14424 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14425 || c
!= sym
->components
->ts
.u
.derived
->components
))
14426 || (!sym
->attr
.is_class
14427 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14428 && !sym
->attr
.vtype
14429 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14432 super_type
= gfc_get_derived_super_type (sym
);
14434 /* If this type is an extension, set the accessibility of the parent
14437 && ((sym
->attr
.is_class
14438 && c
== sym
->components
->ts
.u
.derived
->components
)
14439 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14440 && strcmp (super_type
->name
, c
->name
) == 0)
14441 c
->attr
.access
= super_type
->attr
.access
;
14443 /* If this type is an extension, see if this component has the same name
14444 as an inherited type-bound procedure. */
14445 if (super_type
&& !sym
->attr
.is_class
14446 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14448 gfc_error ("Component %qs of %qs at %L has the same name as an"
14449 " inherited type-bound procedure",
14450 c
->name
, sym
->name
, &c
->loc
);
14454 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14455 && !c
->ts
.deferred
)
14457 if (c
->ts
.u
.cl
->length
== NULL
14458 || (!resolve_charlen(c
->ts
.u
.cl
))
14459 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14461 gfc_error ("Character length of component %qs needs to "
14462 "be a constant specification expression at %L",
14464 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14469 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14470 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14472 gfc_error ("Character component %qs of %qs at %L with deferred "
14473 "length must be a POINTER or ALLOCATABLE",
14474 c
->name
, sym
->name
, &c
->loc
);
14478 /* Add the hidden deferred length field. */
14479 if (c
->ts
.type
== BT_CHARACTER
14480 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14481 && !c
->attr
.function
14482 && !sym
->attr
.is_class
)
14484 char name
[GFC_MAX_SYMBOL_LEN
+9];
14485 gfc_component
*strlen
;
14486 sprintf (name
, "_%s_length", c
->name
);
14487 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14488 if (strlen
== NULL
)
14490 if (!gfc_add_component (sym
, name
, &strlen
))
14492 strlen
->ts
.type
= BT_INTEGER
;
14493 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14494 strlen
->attr
.access
= ACCESS_PRIVATE
;
14495 strlen
->attr
.artificial
= 1;
14499 if (c
->ts
.type
== BT_DERIVED
14500 && sym
->component_access
!= ACCESS_PRIVATE
14501 && gfc_check_symbol_access (sym
)
14502 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14503 && !c
->ts
.u
.derived
->attr
.use_assoc
14504 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14505 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14506 "PRIVATE type and cannot be a component of "
14507 "%qs, which is PUBLIC at %L", c
->name
,
14508 sym
->name
, &sym
->declared_at
))
14511 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14513 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14514 "type %s", c
->name
, &c
->loc
, sym
->name
);
14518 if (sym
->attr
.sequence
)
14520 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14522 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14523 "not have the SEQUENCE attribute",
14524 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14529 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14530 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14531 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14532 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14533 CLASS_DATA (c
)->ts
.u
.derived
14534 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14536 /* If an allocatable component derived type is of the same type as
14537 the enclosing derived type, we need a vtable generating so that
14538 the __deallocate procedure is created. */
14539 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14540 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14541 gfc_find_vtab (&c
->ts
);
14543 /* Ensure that all the derived type components are put on the
14544 derived type list; even in formal namespaces, where derived type
14545 pointer components might not have been declared. */
14546 if (c
->ts
.type
== BT_DERIVED
14548 && c
->ts
.u
.derived
->components
14550 && sym
!= c
->ts
.u
.derived
)
14551 add_dt_to_dt_list (c
->ts
.u
.derived
);
14553 if (!gfc_resolve_array_spec (c
->as
,
14554 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14555 || c
->attr
.allocatable
)))
14558 if (c
->initializer
&& !sym
->attr
.vtype
14559 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14560 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14567 /* Be nice about the locus for a structure expression - show the locus of the
14568 first non-null sub-expression if we can. */
14571 cons_where (gfc_expr
*struct_expr
)
14573 gfc_constructor
*cons
;
14575 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14577 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14578 for (; cons
; cons
= gfc_constructor_next (cons
))
14580 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14581 return &cons
->expr
->where
;
14584 return &struct_expr
->where
;
14587 /* Resolve the components of a structure type. Much less work than derived
14591 resolve_fl_struct (gfc_symbol
*sym
)
14594 gfc_expr
*init
= NULL
;
14597 /* Make sure UNIONs do not have overlapping initializers. */
14598 if (sym
->attr
.flavor
== FL_UNION
)
14600 for (c
= sym
->components
; c
; c
= c
->next
)
14602 if (init
&& c
->initializer
)
14604 gfc_error ("Conflicting initializers in union at %L and %L",
14605 cons_where (init
), cons_where (c
->initializer
));
14606 gfc_free_expr (c
->initializer
);
14607 c
->initializer
= NULL
;
14610 init
= c
->initializer
;
14615 for (c
= sym
->components
; c
; c
= c
->next
)
14616 if (!resolve_component (c
, sym
))
14622 if (sym
->components
)
14623 add_dt_to_dt_list (sym
);
14629 /* Resolve the components of a derived type. This does not have to wait until
14630 resolution stage, but can be done as soon as the dt declaration has been
14634 resolve_fl_derived0 (gfc_symbol
*sym
)
14636 gfc_symbol
* super_type
;
14638 gfc_formal_arglist
*f
;
14641 if (sym
->attr
.unlimited_polymorphic
)
14644 super_type
= gfc_get_derived_super_type (sym
);
14647 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14649 gfc_error ("As extending type %qs at %L has a coarray component, "
14650 "parent type %qs shall also have one", sym
->name
,
14651 &sym
->declared_at
, super_type
->name
);
14655 /* Ensure the extended type gets resolved before we do. */
14656 if (super_type
&& !resolve_fl_derived0 (super_type
))
14659 /* An ABSTRACT type must be extensible. */
14660 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14662 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14663 sym
->name
, &sym
->declared_at
);
14667 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14671 for ( ; c
!= NULL
; c
= c
->next
)
14672 if (!resolve_component (c
, sym
))
14678 /* Now add the caf token field, where needed. */
14679 if (flag_coarray
!= GFC_FCOARRAY_NONE
14680 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14682 for (c
= sym
->components
; c
; c
= c
->next
)
14683 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14684 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14686 char name
[GFC_MAX_SYMBOL_LEN
+9];
14687 gfc_component
*token
;
14688 sprintf (name
, "_caf_%s", c
->name
);
14689 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14692 if (!gfc_add_component (sym
, name
, &token
))
14694 token
->ts
.type
= BT_VOID
;
14695 token
->ts
.kind
= gfc_default_integer_kind
;
14696 token
->attr
.access
= ACCESS_PRIVATE
;
14697 token
->attr
.artificial
= 1;
14698 token
->attr
.caf_token
= 1;
14703 check_defined_assignments (sym
);
14705 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14706 sym
->attr
.defined_assign_comp
14707 = super_type
->attr
.defined_assign_comp
;
14709 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14710 all DEFERRED bindings are overridden. */
14711 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14712 && !sym
->attr
.is_class
14713 && !ensure_not_abstract (sym
, super_type
))
14716 /* Check that there is a component for every PDT parameter. */
14717 if (sym
->attr
.pdt_template
)
14719 for (f
= sym
->formal
; f
; f
= f
->next
)
14723 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14726 gfc_error ("Parameterized type %qs does not have a component "
14727 "corresponding to parameter %qs at %L", sym
->name
,
14728 f
->sym
->name
, &sym
->declared_at
);
14734 /* Add derived type to the derived type list. */
14735 add_dt_to_dt_list (sym
);
14741 /* The following procedure does the full resolution of a derived type,
14742 including resolution of all type-bound procedures (if present). In contrast
14743 to 'resolve_fl_derived0' this can only be done after the module has been
14744 parsed completely. */
14747 resolve_fl_derived (gfc_symbol
*sym
)
14749 gfc_symbol
*gen_dt
= NULL
;
14751 if (sym
->attr
.unlimited_polymorphic
)
14754 if (!sym
->attr
.is_class
)
14755 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14756 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14757 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14758 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14759 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14760 "%qs at %L being the same name as derived "
14761 "type at %L", sym
->name
,
14762 gen_dt
->generic
->sym
== sym
14763 ? gen_dt
->generic
->next
->sym
->name
14764 : gen_dt
->generic
->sym
->name
,
14765 gen_dt
->generic
->sym
== sym
14766 ? &gen_dt
->generic
->next
->sym
->declared_at
14767 : &gen_dt
->generic
->sym
->declared_at
,
14768 &sym
->declared_at
))
14771 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14773 gfc_error ("Derived type %qs at %L has not been declared",
14774 sym
->name
, &sym
->declared_at
);
14778 /* Resolve the finalizer procedures. */
14779 if (!gfc_resolve_finalizers (sym
, NULL
))
14782 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14784 /* Fix up incomplete CLASS symbols. */
14785 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14786 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14788 /* Nothing more to do for unlimited polymorphic entities. */
14789 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14791 else if (vptr
->ts
.u
.derived
== NULL
)
14793 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14795 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14796 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14801 if (!resolve_fl_derived0 (sym
))
14804 /* Resolve the type-bound procedures. */
14805 if (!resolve_typebound_procedures (sym
))
14808 /* Generate module vtables subject to their accessibility and their not
14809 being vtables or pdt templates. If this is not done class declarations
14810 in external procedures wind up with their own version and so SELECT TYPE
14811 fails because the vptrs do not have the same address. */
14812 if (gfc_option
.allow_std
& GFC_STD_F2003
14813 && sym
->ns
->proc_name
14814 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14815 && sym
->attr
.access
!= ACCESS_PRIVATE
14816 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14818 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14819 gfc_set_sym_referenced (vtab
);
14827 resolve_fl_namelist (gfc_symbol
*sym
)
14832 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14834 /* Check again, the check in match only works if NAMELIST comes
14836 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14838 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14839 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14843 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14844 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14845 "with assumed shape in namelist %qs at %L",
14846 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14849 if (is_non_constant_shape_array (nl
->sym
)
14850 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14851 "with nonconstant shape in namelist %qs at %L",
14852 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14855 if (nl
->sym
->ts
.type
== BT_CHARACTER
14856 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14857 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14858 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14859 "nonconstant character length in "
14860 "namelist %qs at %L", nl
->sym
->name
,
14861 sym
->name
, &sym
->declared_at
))
14866 /* Reject PRIVATE objects in a PUBLIC namelist. */
14867 if (gfc_check_symbol_access (sym
))
14869 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14871 if (!nl
->sym
->attr
.use_assoc
14872 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14873 && !gfc_check_symbol_access (nl
->sym
))
14875 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14876 "cannot be member of PUBLIC namelist %qs at %L",
14877 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14881 if (nl
->sym
->ts
.type
== BT_DERIVED
14882 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14883 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14885 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14886 "namelist %qs at %L with ALLOCATABLE "
14887 "or POINTER components", nl
->sym
->name
,
14888 sym
->name
, &sym
->declared_at
))
14893 /* Types with private components that came here by USE-association. */
14894 if (nl
->sym
->ts
.type
== BT_DERIVED
14895 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14897 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14898 "components and cannot be member of namelist %qs at %L",
14899 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14903 /* Types with private components that are defined in the same module. */
14904 if (nl
->sym
->ts
.type
== BT_DERIVED
14905 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14906 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14908 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14909 "cannot be a member of PUBLIC namelist %qs at %L",
14910 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14917 /* 14.1.2 A module or internal procedure represent local entities
14918 of the same type as a namelist member and so are not allowed. */
14919 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14921 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14924 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14925 if ((nl
->sym
== sym
->ns
->proc_name
)
14927 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14932 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14933 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14935 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14936 "attribute in %qs at %L", nlsym
->name
,
14937 &sym
->declared_at
);
14944 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14945 nl
->sym
->attr
.asynchronous
= 1;
14952 resolve_fl_parameter (gfc_symbol
*sym
)
14954 /* A parameter array's shape needs to be constant. */
14955 if (sym
->as
!= NULL
14956 && (sym
->as
->type
== AS_DEFERRED
14957 || is_non_constant_shape_array (sym
)))
14959 gfc_error ("Parameter array %qs at %L cannot be automatic "
14960 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14964 /* Constraints on deferred type parameter. */
14965 if (!deferred_requirements (sym
))
14968 /* Make sure a parameter that has been implicitly typed still
14969 matches the implicit type, since PARAMETER statements can precede
14970 IMPLICIT statements. */
14971 if (sym
->attr
.implicit_type
14972 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14975 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14976 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14980 /* Make sure the types of derived parameters are consistent. This
14981 type checking is deferred until resolution because the type may
14982 refer to a derived type from the host. */
14983 if (sym
->ts
.type
== BT_DERIVED
14984 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14986 gfc_error ("Incompatible derived type in PARAMETER at %L",
14987 &sym
->value
->where
);
14991 /* F03:C509,C514. */
14992 if (sym
->ts
.type
== BT_CLASS
)
14994 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14995 sym
->name
, &sym
->declared_at
);
15003 /* Called by resolve_symbol to check PDTs. */
15006 resolve_pdt (gfc_symbol
* sym
)
15008 gfc_symbol
*derived
= NULL
;
15009 gfc_actual_arglist
*param
;
15011 bool const_len_exprs
= true;
15012 bool assumed_len_exprs
= false;
15013 symbol_attribute
*attr
;
15015 if (sym
->ts
.type
== BT_DERIVED
)
15017 derived
= sym
->ts
.u
.derived
;
15018 attr
= &(sym
->attr
);
15020 else if (sym
->ts
.type
== BT_CLASS
)
15022 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15023 attr
= &(CLASS_DATA (sym
)->attr
);
15026 gcc_unreachable ();
15028 gcc_assert (derived
->attr
.pdt_type
);
15030 for (param
= sym
->param_list
; param
; param
= param
->next
)
15032 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15034 if (c
->attr
.pdt_kind
)
15037 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15038 && c
->attr
.pdt_len
)
15039 const_len_exprs
= false;
15040 else if (param
->spec_type
== SPEC_ASSUMED
)
15041 assumed_len_exprs
= true;
15043 if (param
->spec_type
== SPEC_DEFERRED
15044 && !attr
->allocatable
&& !attr
->pointer
)
15045 gfc_error ("The object %qs at %L has a deferred LEN "
15046 "parameter %qs and is neither allocatable "
15047 "nor a pointer", sym
->name
, &sym
->declared_at
,
15052 if (!const_len_exprs
15053 && (sym
->ns
->proc_name
->attr
.is_main_program
15054 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15055 || sym
->attr
.save
!= SAVE_NONE
))
15056 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15057 "SAVE attribute or be a variable declared in the "
15058 "main program, a module or a submodule(F08/C513)",
15059 sym
->name
, &sym
->declared_at
);
15061 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15062 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15063 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15064 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15065 sym
->name
, &sym
->declared_at
);
15069 /* Do anything necessary to resolve a symbol. Right now, we just
15070 assume that an otherwise unknown symbol is a variable. This sort
15071 of thing commonly happens for symbols in module. */
15074 resolve_symbol (gfc_symbol
*sym
)
15076 int check_constant
, mp_flag
;
15077 gfc_symtree
*symtree
;
15078 gfc_symtree
*this_symtree
;
15081 symbol_attribute class_attr
;
15082 gfc_array_spec
*as
;
15083 bool saved_specification_expr
;
15089 /* No symbol will ever have union type; only components can be unions.
15090 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15091 (just like derived type declaration symbols have flavor FL_DERIVED). */
15092 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15094 /* Coarrayed polymorphic objects with allocatable or pointer components are
15095 yet unsupported for -fcoarray=lib. */
15096 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15097 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15098 && CLASS_DATA (sym
)->attr
.codimension
15099 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15100 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15102 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15103 "type coarrays at %L are unsupported", &sym
->declared_at
);
15107 if (sym
->attr
.artificial
)
15110 if (sym
->attr
.unlimited_polymorphic
)
15113 if (sym
->attr
.flavor
== FL_UNKNOWN
15114 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15115 && !sym
->attr
.generic
&& !sym
->attr
.external
15116 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15117 && sym
->ts
.type
== BT_UNKNOWN
))
15120 /* If we find that a flavorless symbol is an interface in one of the
15121 parent namespaces, find its symtree in this namespace, free the
15122 symbol and set the symtree to point to the interface symbol. */
15123 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15125 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15126 if (symtree
&& (symtree
->n
.sym
->generic
||
15127 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15128 && sym
->ns
->construct_entities
)))
15130 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15132 if (this_symtree
->n
.sym
== sym
)
15134 symtree
->n
.sym
->refs
++;
15135 gfc_release_symbol (sym
);
15136 this_symtree
->n
.sym
= symtree
->n
.sym
;
15142 /* Otherwise give it a flavor according to such attributes as
15144 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15145 && sym
->attr
.intrinsic
== 0)
15146 sym
->attr
.flavor
= FL_VARIABLE
;
15147 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15149 sym
->attr
.flavor
= FL_PROCEDURE
;
15150 if (sym
->attr
.dimension
)
15151 sym
->attr
.function
= 1;
15155 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15156 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15158 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15159 && !resolve_procedure_interface (sym
))
15162 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15163 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15165 if (sym
->attr
.external
)
15166 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15167 "at %L", &sym
->declared_at
);
15169 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15170 "at %L", &sym
->declared_at
);
15175 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15178 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15179 && !resolve_fl_struct (sym
))
15182 /* Symbols that are module procedures with results (functions) have
15183 the types and array specification copied for type checking in
15184 procedures that call them, as well as for saving to a module
15185 file. These symbols can't stand the scrutiny that their results
15187 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15189 /* Make sure that the intrinsic is consistent with its internal
15190 representation. This needs to be done before assigning a default
15191 type to avoid spurious warnings. */
15192 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15193 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15196 /* Resolve associate names. */
15198 resolve_assoc_var (sym
, true);
15200 /* Assign default type to symbols that need one and don't have one. */
15201 if (sym
->ts
.type
== BT_UNKNOWN
)
15203 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15205 gfc_set_default_type (sym
, 1, NULL
);
15208 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15209 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15210 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15211 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15213 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15215 /* The specific case of an external procedure should emit an error
15216 in the case that there is no implicit type. */
15219 if (!sym
->attr
.mixed_entry_master
)
15220 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15224 /* Result may be in another namespace. */
15225 resolve_symbol (sym
->result
);
15227 if (!sym
->result
->attr
.proc_pointer
)
15229 sym
->ts
= sym
->result
->ts
;
15230 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15231 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15232 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15233 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15234 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15239 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15241 bool saved_specification_expr
= specification_expr
;
15242 specification_expr
= true;
15243 gfc_resolve_array_spec (sym
->result
->as
, false);
15244 specification_expr
= saved_specification_expr
;
15247 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15249 as
= CLASS_DATA (sym
)->as
;
15250 class_attr
= CLASS_DATA (sym
)->attr
;
15251 class_attr
.pointer
= class_attr
.class_pointer
;
15255 class_attr
= sym
->attr
;
15260 if (sym
->attr
.contiguous
15261 && (!class_attr
.dimension
15262 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15263 && !class_attr
.pointer
)))
15265 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15266 "array pointer or an assumed-shape or assumed-rank array",
15267 sym
->name
, &sym
->declared_at
);
15271 /* Assumed size arrays and assumed shape arrays must be dummy
15272 arguments. Array-spec's of implied-shape should have been resolved to
15273 AS_EXPLICIT already. */
15277 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15278 specification expression. */
15279 if (as
->type
== AS_IMPLIED_SHAPE
)
15282 for (i
=0; i
<as
->rank
; i
++)
15284 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15286 gfc_error ("Bad specification for assumed size array at %L",
15287 &as
->lower
[i
]->where
);
15294 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15295 || as
->type
== AS_ASSUMED_SHAPE
)
15296 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15298 if (as
->type
== AS_ASSUMED_SIZE
)
15299 gfc_error ("Assumed size array at %L must be a dummy argument",
15300 &sym
->declared_at
);
15302 gfc_error ("Assumed shape array at %L must be a dummy argument",
15303 &sym
->declared_at
);
15306 /* TS 29113, C535a. */
15307 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15308 && !sym
->attr
.select_type_temporary
15309 && !(cs_base
&& cs_base
->current
15310 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15312 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15313 &sym
->declared_at
);
15316 if (as
->type
== AS_ASSUMED_RANK
15317 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15319 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15320 "CODIMENSION attribute", &sym
->declared_at
);
15325 /* Make sure symbols with known intent or optional are really dummy
15326 variable. Because of ENTRY statement, this has to be deferred
15327 until resolution time. */
15329 if (!sym
->attr
.dummy
15330 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15332 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15336 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15338 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15339 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15343 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15345 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15346 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15348 gfc_error ("Character dummy variable %qs at %L with VALUE "
15349 "attribute must have constant length",
15350 sym
->name
, &sym
->declared_at
);
15354 if (sym
->ts
.is_c_interop
15355 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15357 gfc_error ("C interoperable character dummy variable %qs at %L "
15358 "with VALUE attribute must have length one",
15359 sym
->name
, &sym
->declared_at
);
15364 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15365 && sym
->ts
.u
.derived
->attr
.generic
)
15367 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15368 if (!sym
->ts
.u
.derived
)
15370 gfc_error ("The derived type %qs at %L is of type %qs, "
15371 "which has not been defined", sym
->name
,
15372 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15373 sym
->ts
.type
= BT_UNKNOWN
;
15378 /* Use the same constraints as TYPE(*), except for the type check
15379 and that only scalars and assumed-size arrays are permitted. */
15380 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15382 if (!sym
->attr
.dummy
)
15384 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15385 "a dummy argument", sym
->name
, &sym
->declared_at
);
15389 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15390 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15391 && sym
->ts
.type
!= BT_COMPLEX
)
15393 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15394 "of type TYPE(*) or of an numeric intrinsic type",
15395 sym
->name
, &sym
->declared_at
);
15399 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15400 || sym
->attr
.pointer
|| sym
->attr
.value
)
15402 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15403 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15404 "attribute", sym
->name
, &sym
->declared_at
);
15408 if (sym
->attr
.intent
== INTENT_OUT
)
15410 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15411 "have the INTENT(OUT) attribute",
15412 sym
->name
, &sym
->declared_at
);
15415 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15417 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15418 "either be a scalar or an assumed-size array",
15419 sym
->name
, &sym
->declared_at
);
15423 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15424 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15426 sym
->ts
.type
= BT_ASSUMED
;
15427 sym
->as
= gfc_get_array_spec ();
15428 sym
->as
->type
= AS_ASSUMED_SIZE
;
15430 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15432 else if (sym
->ts
.type
== BT_ASSUMED
)
15434 /* TS 29113, C407a. */
15435 if (!sym
->attr
.dummy
)
15437 gfc_error ("Assumed type of variable %s at %L is only permitted "
15438 "for dummy variables", sym
->name
, &sym
->declared_at
);
15441 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15442 || sym
->attr
.pointer
|| sym
->attr
.value
)
15444 gfc_error ("Assumed-type variable %s at %L may not have the "
15445 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15446 sym
->name
, &sym
->declared_at
);
15449 if (sym
->attr
.intent
== INTENT_OUT
)
15451 gfc_error ("Assumed-type variable %s at %L may not have the "
15452 "INTENT(OUT) attribute",
15453 sym
->name
, &sym
->declared_at
);
15456 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15458 gfc_error ("Assumed-type variable %s at %L shall not be an "
15459 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15464 /* If the symbol is marked as bind(c), that it is declared at module level
15465 scope and verify its type and kind. Do not do the latter for symbols
15466 that are implicitly typed because that is handled in
15467 gfc_set_default_type. Handle dummy arguments and procedure definitions
15468 separately. Also, anything that is use associated is not handled here
15469 but instead is handled in the module it is declared in. Finally, derived
15470 type definitions are allowed to be BIND(C) since that only implies that
15471 they're interoperable, and they are checked fully for interoperability
15472 when a variable is declared of that type. */
15473 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15474 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15475 && sym
->attr
.flavor
!= FL_DERIVED
)
15479 /* First, make sure the variable is declared at the
15480 module-level scope (J3/04-007, Section 15.3). */
15481 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15482 sym
->attr
.in_common
== 0)
15484 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15485 "is neither a COMMON block nor declared at the "
15486 "module level scope", sym
->name
, &(sym
->declared_at
));
15489 else if (sym
->ts
.type
== BT_CHARACTER
15490 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15491 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15492 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15494 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15495 sym
->name
, &sym
->declared_at
);
15498 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15500 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15502 else if (sym
->attr
.implicit_type
== 0)
15504 /* If type() declaration, we need to verify that the components
15505 of the given type are all C interoperable, etc. */
15506 if (sym
->ts
.type
== BT_DERIVED
&&
15507 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15509 /* Make sure the user marked the derived type as BIND(C). If
15510 not, call the verify routine. This could print an error
15511 for the derived type more than once if multiple variables
15512 of that type are declared. */
15513 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15514 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15518 /* Verify the variable itself as C interoperable if it
15519 is BIND(C). It is not possible for this to succeed if
15520 the verify_bind_c_derived_type failed, so don't have to handle
15521 any error returned by verify_bind_c_derived_type. */
15522 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15523 sym
->common_block
);
15528 /* clear the is_bind_c flag to prevent reporting errors more than
15529 once if something failed. */
15530 sym
->attr
.is_bind_c
= 0;
15535 /* If a derived type symbol has reached this point, without its
15536 type being declared, we have an error. Notice that most
15537 conditions that produce undefined derived types have already
15538 been dealt with. However, the likes of:
15539 implicit type(t) (t) ..... call foo (t) will get us here if
15540 the type is not declared in the scope of the implicit
15541 statement. Change the type to BT_UNKNOWN, both because it is so
15542 and to prevent an ICE. */
15543 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15544 && sym
->ts
.u
.derived
->components
== NULL
15545 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15547 gfc_error ("The derived type %qs at %L is of type %qs, "
15548 "which has not been defined", sym
->name
,
15549 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15550 sym
->ts
.type
= BT_UNKNOWN
;
15554 /* Make sure that the derived type has been resolved and that the
15555 derived type is visible in the symbol's namespace, if it is a
15556 module function and is not PRIVATE. */
15557 if (sym
->ts
.type
== BT_DERIVED
15558 && sym
->ts
.u
.derived
->attr
.use_assoc
15559 && sym
->ns
->proc_name
15560 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15561 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15564 /* Unless the derived-type declaration is use associated, Fortran 95
15565 does not allow public entries of private derived types.
15566 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15567 161 in 95-006r3. */
15568 if (sym
->ts
.type
== BT_DERIVED
15569 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15570 && !sym
->ts
.u
.derived
->attr
.use_assoc
15571 && gfc_check_symbol_access (sym
)
15572 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15573 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15574 "derived type %qs",
15575 (sym
->attr
.flavor
== FL_PARAMETER
)
15576 ? "parameter" : "variable",
15577 sym
->name
, &sym
->declared_at
,
15578 sym
->ts
.u
.derived
->name
))
15581 /* F2008, C1302. */
15582 if (sym
->ts
.type
== BT_DERIVED
15583 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15584 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15585 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15586 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15588 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15589 "type LOCK_TYPE must be a coarray", sym
->name
,
15590 &sym
->declared_at
);
15594 /* TS18508, C702/C703. */
15595 if (sym
->ts
.type
== BT_DERIVED
15596 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15597 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15598 || sym
->ts
.u
.derived
->attr
.event_comp
)
15599 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15601 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15602 "type EVENT_TYPE must be a coarray", sym
->name
,
15603 &sym
->declared_at
);
15607 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15608 default initialization is defined (5.1.2.4.4). */
15609 if (sym
->ts
.type
== BT_DERIVED
15611 && sym
->attr
.intent
== INTENT_OUT
15613 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15615 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15617 if (c
->initializer
)
15619 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15620 "ASSUMED SIZE and so cannot have a default initializer",
15621 sym
->name
, &sym
->declared_at
);
15628 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15629 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15631 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15632 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15637 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15638 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15640 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15641 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15646 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15647 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15648 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15649 || class_attr
.codimension
)
15650 && (sym
->attr
.result
|| sym
->result
== sym
))
15652 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15653 "a coarray component", sym
->name
, &sym
->declared_at
);
15658 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15659 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15661 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15662 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15667 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15668 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15669 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15670 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15671 || class_attr
.allocatable
))
15673 gfc_error ("Variable %qs at %L with coarray component shall be a "
15674 "nonpointer, nonallocatable scalar, which is not a coarray",
15675 sym
->name
, &sym
->declared_at
);
15679 /* F2008, C526. The function-result case was handled above. */
15680 if (class_attr
.codimension
15681 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15682 || sym
->attr
.select_type_temporary
15683 || sym
->attr
.associate_var
15684 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15685 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15686 || sym
->ns
->proc_name
->attr
.is_main_program
15687 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15689 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15690 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15694 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15695 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15697 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15698 "deferred shape", sym
->name
, &sym
->declared_at
);
15701 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15702 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15704 gfc_error ("Allocatable coarray variable %qs at %L must have "
15705 "deferred shape", sym
->name
, &sym
->declared_at
);
15710 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15711 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15712 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15713 || (class_attr
.codimension
&& class_attr
.allocatable
))
15714 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15716 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15717 "allocatable coarray or have coarray components",
15718 sym
->name
, &sym
->declared_at
);
15722 if (class_attr
.codimension
&& sym
->attr
.dummy
15723 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15725 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15726 "procedure %qs", sym
->name
, &sym
->declared_at
,
15727 sym
->ns
->proc_name
->name
);
15731 if (sym
->ts
.type
== BT_LOGICAL
15732 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15733 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15734 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15737 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15738 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15740 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15741 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15742 "%L with non-C_Bool kind in BIND(C) procedure "
15743 "%qs", sym
->name
, &sym
->declared_at
,
15744 sym
->ns
->proc_name
->name
))
15746 else if (!gfc_logical_kinds
[i
].c_bool
15747 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15748 "%qs at %L with non-C_Bool kind in "
15749 "BIND(C) procedure %qs", sym
->name
,
15751 sym
->attr
.function
? sym
->name
15752 : sym
->ns
->proc_name
->name
))
15756 switch (sym
->attr
.flavor
)
15759 if (!resolve_fl_variable (sym
, mp_flag
))
15764 if (sym
->formal
&& !sym
->formal_ns
)
15766 /* Check that none of the arguments are a namelist. */
15767 gfc_formal_arglist
*formal
= sym
->formal
;
15769 for (; formal
; formal
= formal
->next
)
15770 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15772 gfc_error ("Namelist %qs cannot be an argument to "
15773 "subroutine or function at %L",
15774 formal
->sym
->name
, &sym
->declared_at
);
15779 if (!resolve_fl_procedure (sym
, mp_flag
))
15784 if (!resolve_fl_namelist (sym
))
15789 if (!resolve_fl_parameter (sym
))
15797 /* Resolve array specifier. Check as well some constraints
15798 on COMMON blocks. */
15800 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15802 /* Set the formal_arg_flag so that check_conflict will not throw
15803 an error for host associated variables in the specification
15804 expression for an array_valued function. */
15805 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15806 formal_arg_flag
= true;
15808 saved_specification_expr
= specification_expr
;
15809 specification_expr
= true;
15810 gfc_resolve_array_spec (sym
->as
, check_constant
);
15811 specification_expr
= saved_specification_expr
;
15813 formal_arg_flag
= false;
15815 /* Resolve formal namespaces. */
15816 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15817 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15818 gfc_resolve (sym
->formal_ns
);
15820 /* Make sure the formal namespace is present. */
15821 if (sym
->formal
&& !sym
->formal_ns
)
15823 gfc_formal_arglist
*formal
= sym
->formal
;
15824 while (formal
&& !formal
->sym
)
15825 formal
= formal
->next
;
15829 sym
->formal_ns
= formal
->sym
->ns
;
15830 if (sym
->ns
!= formal
->sym
->ns
)
15831 sym
->formal_ns
->refs
++;
15835 /* Check threadprivate restrictions. */
15836 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15837 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15838 && (!sym
->attr
.in_common
15839 && sym
->module
== NULL
15840 && (sym
->ns
->proc_name
== NULL
15841 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15842 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15844 /* Check omp declare target restrictions. */
15845 if (sym
->attr
.omp_declare_target
15846 && sym
->attr
.flavor
== FL_VARIABLE
15848 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15849 && (!sym
->attr
.in_common
15850 && sym
->module
== NULL
15851 && (sym
->ns
->proc_name
== NULL
15852 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15853 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15854 sym
->name
, &sym
->declared_at
);
15856 /* If we have come this far we can apply default-initializers, as
15857 described in 14.7.5, to those variables that have not already
15858 been assigned one. */
15859 if (sym
->ts
.type
== BT_DERIVED
15861 && !sym
->attr
.allocatable
15862 && !sym
->attr
.alloc_comp
)
15864 symbol_attribute
*a
= &sym
->attr
;
15866 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15867 && !a
->in_common
&& !a
->use_assoc
15869 && !((a
->function
|| a
->result
)
15871 || sym
->ts
.u
.derived
->attr
.alloc_comp
15872 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15873 && !(a
->function
&& sym
!= sym
->result
))
15874 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15875 apply_default_init (sym
);
15876 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15877 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15878 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15879 /* Mark the result symbol to be referenced, when it has allocatable
15881 sym
->result
->attr
.referenced
= 1;
15884 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15885 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15886 && !CLASS_DATA (sym
)->attr
.class_pointer
15887 && !CLASS_DATA (sym
)->attr
.allocatable
)
15888 apply_default_init (sym
);
15890 /* If this symbol has a type-spec, check it. */
15891 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15892 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15893 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15896 if (sym
->param_list
)
15901 /************* Resolve DATA statements *************/
15905 gfc_data_value
*vnode
;
15911 /* Advance the values structure to point to the next value in the data list. */
15914 next_data_value (void)
15916 while (mpz_cmp_ui (values
.left
, 0) == 0)
15919 if (values
.vnode
->next
== NULL
)
15922 values
.vnode
= values
.vnode
->next
;
15923 mpz_set (values
.left
, values
.vnode
->repeat
);
15931 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15937 ar_type mark
= AR_UNKNOWN
;
15939 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15945 if (!gfc_resolve_expr (var
->expr
))
15949 mpz_init_set_si (offset
, 0);
15952 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15953 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15954 e
= e
->value
.function
.actual
->expr
;
15956 if (e
->expr_type
!= EXPR_VARIABLE
)
15958 gfc_error ("Expecting definable entity near %L", where
);
15962 sym
= e
->symtree
->n
.sym
;
15964 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15966 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15967 sym
->name
, &sym
->declared_at
);
15971 if (e
->ref
== NULL
&& sym
->as
)
15973 gfc_error ("DATA array %qs at %L must be specified in a previous"
15974 " declaration", sym
->name
, where
);
15978 if (gfc_is_coindexed (e
))
15980 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15985 has_pointer
= sym
->attr
.pointer
;
15987 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15989 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15994 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
15996 gfc_error ("DATA element %qs at %L is a pointer and so must "
15997 "be a full array", sym
->name
, where
);
16001 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16003 gfc_error ("DATA object near %L has the pointer attribute "
16004 "and the corresponding DATA value is not a valid "
16005 "initial-data-target", where
);
16011 if (e
->rank
== 0 || has_pointer
)
16013 mpz_init_set_ui (size
, 1);
16020 /* Find the array section reference. */
16021 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16023 if (ref
->type
!= REF_ARRAY
)
16025 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16031 /* Set marks according to the reference pattern. */
16032 switch (ref
->u
.ar
.type
)
16040 /* Get the start position of array section. */
16041 gfc_get_section_index (ar
, section_index
, &offset
);
16046 gcc_unreachable ();
16049 if (!gfc_array_size (e
, &size
))
16051 gfc_error ("Nonconstant array section at %L in DATA statement",
16053 mpz_clear (offset
);
16060 while (mpz_cmp_ui (size
, 0) > 0)
16062 if (!next_data_value ())
16064 gfc_error ("DATA statement at %L has more variables than values",
16070 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16074 /* If we have more than one element left in the repeat count,
16075 and we have more than one element left in the target variable,
16076 then create a range assignment. */
16077 /* FIXME: Only done for full arrays for now, since array sections
16079 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16080 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16084 if (mpz_cmp (size
, values
.left
) >= 0)
16086 mpz_init_set (range
, values
.left
);
16087 mpz_sub (size
, size
, values
.left
);
16088 mpz_set_ui (values
.left
, 0);
16092 mpz_init_set (range
, size
);
16093 mpz_sub (values
.left
, values
.left
, size
);
16094 mpz_set_ui (size
, 0);
16097 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16100 mpz_add (offset
, offset
, range
);
16107 /* Assign initial value to symbol. */
16110 mpz_sub_ui (values
.left
, values
.left
, 1);
16111 mpz_sub_ui (size
, size
, 1);
16113 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16118 if (mark
== AR_FULL
)
16119 mpz_add_ui (offset
, offset
, 1);
16121 /* Modify the array section indexes and recalculate the offset
16122 for next element. */
16123 else if (mark
== AR_SECTION
)
16124 gfc_advance_section (section_index
, ar
, &offset
);
16128 if (mark
== AR_SECTION
)
16130 for (i
= 0; i
< ar
->dimen
; i
++)
16131 mpz_clear (section_index
[i
]);
16135 mpz_clear (offset
);
16141 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16143 /* Iterate over a list of elements in a DATA statement. */
16146 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16149 iterator_stack frame
;
16150 gfc_expr
*e
, *start
, *end
, *step
;
16151 bool retval
= true;
16153 mpz_init (frame
.value
);
16156 start
= gfc_copy_expr (var
->iter
.start
);
16157 end
= gfc_copy_expr (var
->iter
.end
);
16158 step
= gfc_copy_expr (var
->iter
.step
);
16160 if (!gfc_simplify_expr (start
, 1)
16161 || start
->expr_type
!= EXPR_CONSTANT
)
16163 gfc_error ("start of implied-do loop at %L could not be "
16164 "simplified to a constant value", &start
->where
);
16168 if (!gfc_simplify_expr (end
, 1)
16169 || end
->expr_type
!= EXPR_CONSTANT
)
16171 gfc_error ("end of implied-do loop at %L could not be "
16172 "simplified to a constant value", &start
->where
);
16176 if (!gfc_simplify_expr (step
, 1)
16177 || step
->expr_type
!= EXPR_CONSTANT
)
16179 gfc_error ("step of implied-do loop at %L could not be "
16180 "simplified to a constant value", &start
->where
);
16185 mpz_set (trip
, end
->value
.integer
);
16186 mpz_sub (trip
, trip
, start
->value
.integer
);
16187 mpz_add (trip
, trip
, step
->value
.integer
);
16189 mpz_div (trip
, trip
, step
->value
.integer
);
16191 mpz_set (frame
.value
, start
->value
.integer
);
16193 frame
.prev
= iter_stack
;
16194 frame
.variable
= var
->iter
.var
->symtree
;
16195 iter_stack
= &frame
;
16197 while (mpz_cmp_ui (trip
, 0) > 0)
16199 if (!traverse_data_var (var
->list
, where
))
16205 e
= gfc_copy_expr (var
->expr
);
16206 if (!gfc_simplify_expr (e
, 1))
16213 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16215 mpz_sub_ui (trip
, trip
, 1);
16219 mpz_clear (frame
.value
);
16222 gfc_free_expr (start
);
16223 gfc_free_expr (end
);
16224 gfc_free_expr (step
);
16226 iter_stack
= frame
.prev
;
16231 /* Type resolve variables in the variable list of a DATA statement. */
16234 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16238 for (; var
; var
= var
->next
)
16240 if (var
->expr
== NULL
)
16241 t
= traverse_data_list (var
, where
);
16243 t
= check_data_variable (var
, where
);
16253 /* Resolve the expressions and iterators associated with a data statement.
16254 This is separate from the assignment checking because data lists should
16255 only be resolved once. */
16258 resolve_data_variables (gfc_data_variable
*d
)
16260 for (; d
; d
= d
->next
)
16262 if (d
->list
== NULL
)
16264 if (!gfc_resolve_expr (d
->expr
))
16269 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16272 if (!resolve_data_variables (d
->list
))
16281 /* Resolve a single DATA statement. We implement this by storing a pointer to
16282 the value list into static variables, and then recursively traversing the
16283 variables list, expanding iterators and such. */
16286 resolve_data (gfc_data
*d
)
16289 if (!resolve_data_variables (d
->var
))
16292 values
.vnode
= d
->value
;
16293 if (d
->value
== NULL
)
16294 mpz_set_ui (values
.left
, 0);
16296 mpz_set (values
.left
, d
->value
->repeat
);
16298 if (!traverse_data_var (d
->var
, &d
->where
))
16301 /* At this point, we better not have any values left. */
16303 if (next_data_value ())
16304 gfc_error ("DATA statement at %L has more values than variables",
16309 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16310 accessed by host or use association, is a dummy argument to a pure function,
16311 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16312 is storage associated with any such variable, shall not be used in the
16313 following contexts: (clients of this function). */
16315 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16316 procedure. Returns zero if assignment is OK, nonzero if there is a
16319 gfc_impure_variable (gfc_symbol
*sym
)
16324 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16327 /* Check if the symbol's ns is inside the pure procedure. */
16328 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16332 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16336 proc
= sym
->ns
->proc_name
;
16337 if (sym
->attr
.dummy
16338 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16339 || proc
->attr
.function
))
16342 /* TODO: Sort out what can be storage associated, if anything, and include
16343 it here. In principle equivalences should be scanned but it does not
16344 seem to be possible to storage associate an impure variable this way. */
16349 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16350 current namespace is inside a pure procedure. */
16353 gfc_pure (gfc_symbol
*sym
)
16355 symbol_attribute attr
;
16360 /* Check if the current namespace or one of its parents
16361 belongs to a pure procedure. */
16362 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16364 sym
= ns
->proc_name
;
16368 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16376 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16380 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16381 checks if the current namespace is implicitly pure. Note that this
16382 function returns false for a PURE procedure. */
16385 gfc_implicit_pure (gfc_symbol
*sym
)
16391 /* Check if the current procedure is implicit_pure. Walk up
16392 the procedure list until we find a procedure. */
16393 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16395 sym
= ns
->proc_name
;
16399 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16404 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16405 && !sym
->attr
.pure
;
16410 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16416 /* Check if the current procedure is implicit_pure. Walk up
16417 the procedure list until we find a procedure. */
16418 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16420 sym
= ns
->proc_name
;
16424 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16429 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16430 sym
->attr
.implicit_pure
= 0;
16432 sym
->attr
.pure
= 0;
16436 /* Test whether the current procedure is elemental or not. */
16439 gfc_elemental (gfc_symbol
*sym
)
16441 symbol_attribute attr
;
16444 sym
= gfc_current_ns
->proc_name
;
16449 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16453 /* Warn about unused labels. */
16456 warn_unused_fortran_label (gfc_st_label
*label
)
16461 warn_unused_fortran_label (label
->left
);
16463 if (label
->defined
== ST_LABEL_UNKNOWN
)
16466 switch (label
->referenced
)
16468 case ST_LABEL_UNKNOWN
:
16469 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16470 label
->value
, &label
->where
);
16473 case ST_LABEL_BAD_TARGET
:
16474 gfc_warning (OPT_Wunused_label
,
16475 "Label %d at %L defined but cannot be used",
16476 label
->value
, &label
->where
);
16483 warn_unused_fortran_label (label
->right
);
16487 /* Returns the sequence type of a symbol or sequence. */
16490 sequence_type (gfc_typespec ts
)
16499 if (ts
.u
.derived
->components
== NULL
)
16500 return SEQ_NONDEFAULT
;
16502 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16503 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16504 if (sequence_type (c
->ts
) != result
)
16510 if (ts
.kind
!= gfc_default_character_kind
)
16511 return SEQ_NONDEFAULT
;
16513 return SEQ_CHARACTER
;
16516 if (ts
.kind
!= gfc_default_integer_kind
)
16517 return SEQ_NONDEFAULT
;
16519 return SEQ_NUMERIC
;
16522 if (!(ts
.kind
== gfc_default_real_kind
16523 || ts
.kind
== gfc_default_double_kind
))
16524 return SEQ_NONDEFAULT
;
16526 return SEQ_NUMERIC
;
16529 if (ts
.kind
!= gfc_default_complex_kind
)
16530 return SEQ_NONDEFAULT
;
16532 return SEQ_NUMERIC
;
16535 if (ts
.kind
!= gfc_default_logical_kind
)
16536 return SEQ_NONDEFAULT
;
16538 return SEQ_NUMERIC
;
16541 return SEQ_NONDEFAULT
;
16546 /* Resolve derived type EQUIVALENCE object. */
16549 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16551 gfc_component
*c
= derived
->components
;
16556 /* Shall not be an object of nonsequence derived type. */
16557 if (!derived
->attr
.sequence
)
16559 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16560 "attribute to be an EQUIVALENCE object", sym
->name
,
16565 /* Shall not have allocatable components. */
16566 if (derived
->attr
.alloc_comp
)
16568 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16569 "components to be an EQUIVALENCE object",sym
->name
,
16574 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16576 gfc_error ("Derived type variable %qs at %L with default "
16577 "initialization cannot be in EQUIVALENCE with a variable "
16578 "in COMMON", sym
->name
, &e
->where
);
16582 for (; c
; c
= c
->next
)
16584 if (gfc_bt_struct (c
->ts
.type
)
16585 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16588 /* Shall not be an object of sequence derived type containing a pointer
16589 in the structure. */
16590 if (c
->attr
.pointer
)
16592 gfc_error ("Derived type variable %qs at %L with pointer "
16593 "component(s) cannot be an EQUIVALENCE object",
16594 sym
->name
, &e
->where
);
16602 /* Resolve equivalence object.
16603 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16604 an allocatable array, an object of nonsequence derived type, an object of
16605 sequence derived type containing a pointer at any level of component
16606 selection, an automatic object, a function name, an entry name, a result
16607 name, a named constant, a structure component, or a subobject of any of
16608 the preceding objects. A substring shall not have length zero. A
16609 derived type shall not have components with default initialization nor
16610 shall two objects of an equivalence group be initialized.
16611 Either all or none of the objects shall have an protected attribute.
16612 The simple constraints are done in symbol.c(check_conflict) and the rest
16613 are implemented here. */
16616 resolve_equivalence (gfc_equiv
*eq
)
16619 gfc_symbol
*first_sym
;
16622 locus
*last_where
= NULL
;
16623 seq_type eq_type
, last_eq_type
;
16624 gfc_typespec
*last_ts
;
16625 int object
, cnt_protected
;
16628 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16630 first_sym
= eq
->expr
->symtree
->n
.sym
;
16634 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16638 e
->ts
= e
->symtree
->n
.sym
->ts
;
16639 /* match_varspec might not know yet if it is seeing
16640 array reference or substring reference, as it doesn't
16642 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16644 gfc_ref
*ref
= e
->ref
;
16645 sym
= e
->symtree
->n
.sym
;
16647 if (sym
->attr
.dimension
)
16649 ref
->u
.ar
.as
= sym
->as
;
16653 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16654 if (e
->ts
.type
== BT_CHARACTER
16656 && ref
->type
== REF_ARRAY
16657 && ref
->u
.ar
.dimen
== 1
16658 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16659 && ref
->u
.ar
.stride
[0] == NULL
)
16661 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16662 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16665 /* Optimize away the (:) reference. */
16666 if (start
== NULL
&& end
== NULL
)
16669 e
->ref
= ref
->next
;
16671 e
->ref
->next
= ref
->next
;
16676 ref
->type
= REF_SUBSTRING
;
16678 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16680 ref
->u
.ss
.start
= start
;
16681 if (end
== NULL
&& e
->ts
.u
.cl
)
16682 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16683 ref
->u
.ss
.end
= end
;
16684 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16691 /* Any further ref is an error. */
16694 gcc_assert (ref
->type
== REF_ARRAY
);
16695 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16701 if (!gfc_resolve_expr (e
))
16704 sym
= e
->symtree
->n
.sym
;
16706 if (sym
->attr
.is_protected
)
16708 if (cnt_protected
> 0 && cnt_protected
!= object
)
16710 gfc_error ("Either all or none of the objects in the "
16711 "EQUIVALENCE set at %L shall have the "
16712 "PROTECTED attribute",
16717 /* Shall not equivalence common block variables in a PURE procedure. */
16718 if (sym
->ns
->proc_name
16719 && sym
->ns
->proc_name
->attr
.pure
16720 && sym
->attr
.in_common
)
16722 /* Need to check for symbols that may have entered the pure
16723 procedure via a USE statement. */
16724 bool saw_sym
= false;
16725 if (sym
->ns
->use_stmts
)
16728 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16729 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16735 gfc_error ("COMMON block member %qs at %L cannot be an "
16736 "EQUIVALENCE object in the pure procedure %qs",
16737 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16741 /* Shall not be a named constant. */
16742 if (e
->expr_type
== EXPR_CONSTANT
)
16744 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16745 "object", sym
->name
, &e
->where
);
16749 if (e
->ts
.type
== BT_DERIVED
16750 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16753 /* Check that the types correspond correctly:
16755 A numeric sequence structure may be equivalenced to another sequence
16756 structure, an object of default integer type, default real type, double
16757 precision real type, default logical type such that components of the
16758 structure ultimately only become associated to objects of the same
16759 kind. A character sequence structure may be equivalenced to an object
16760 of default character kind or another character sequence structure.
16761 Other objects may be equivalenced only to objects of the same type and
16762 kind parameters. */
16764 /* Identical types are unconditionally OK. */
16765 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16766 goto identical_types
;
16768 last_eq_type
= sequence_type (*last_ts
);
16769 eq_type
= sequence_type (sym
->ts
);
16771 /* Since the pair of objects is not of the same type, mixed or
16772 non-default sequences can be rejected. */
16774 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16775 "statement at %L with different type objects";
16777 && last_eq_type
== SEQ_MIXED
16778 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16779 || (eq_type
== SEQ_MIXED
16780 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16783 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16784 "statement at %L with objects of different type";
16786 && last_eq_type
== SEQ_NONDEFAULT
16787 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16788 || (eq_type
== SEQ_NONDEFAULT
16789 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16792 msg
="Non-CHARACTER object %qs in default CHARACTER "
16793 "EQUIVALENCE statement at %L";
16794 if (last_eq_type
== SEQ_CHARACTER
16795 && eq_type
!= SEQ_CHARACTER
16796 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16799 msg
="Non-NUMERIC object %qs in default NUMERIC "
16800 "EQUIVALENCE statement at %L";
16801 if (last_eq_type
== SEQ_NUMERIC
16802 && eq_type
!= SEQ_NUMERIC
16803 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16808 last_where
= &e
->where
;
16813 /* Shall not be an automatic array. */
16814 if (e
->ref
->type
== REF_ARRAY
16815 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16817 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16818 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16825 /* Shall not be a structure component. */
16826 if (r
->type
== REF_COMPONENT
)
16828 gfc_error ("Structure component %qs at %L cannot be an "
16829 "EQUIVALENCE object",
16830 r
->u
.c
.component
->name
, &e
->where
);
16834 /* A substring shall not have length zero. */
16835 if (r
->type
== REF_SUBSTRING
)
16837 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16839 gfc_error ("Substring at %L has length zero",
16840 &r
->u
.ss
.start
->where
);
16850 /* Function called by resolve_fntype to flag other symbols used in the
16851 length type parameter specification of function results. */
16854 flag_fn_result_spec (gfc_expr
*expr
,
16856 int *f ATTRIBUTE_UNUSED
)
16861 if (expr
->expr_type
== EXPR_VARIABLE
)
16863 s
= expr
->symtree
->n
.sym
;
16864 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16870 gfc_error ("Self reference in character length expression "
16871 "for %qs at %L", sym
->name
, &expr
->where
);
16875 if (!s
->fn_result_spec
16876 && s
->attr
.flavor
== FL_PARAMETER
)
16878 /* Function contained in a module.... */
16879 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16882 s
->fn_result_spec
= 1;
16883 /* Make sure that this symbol is translated as a module
16885 st
= gfc_get_unique_symtree (ns
);
16889 /* ... which is use associated and called. */
16890 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16892 /* External function matched with an interface. */
16895 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16896 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16897 && s
->ns
->proc_name
->attr
.function
))
16898 s
->fn_result_spec
= 1;
16905 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16908 resolve_fntype (gfc_namespace
*ns
)
16910 gfc_entry_list
*el
;
16913 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16916 /* If there are any entries, ns->proc_name is the entry master
16917 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16919 sym
= ns
->entries
->sym
;
16921 sym
= ns
->proc_name
;
16922 if (sym
->result
== sym
16923 && sym
->ts
.type
== BT_UNKNOWN
16924 && !gfc_set_default_type (sym
, 0, NULL
)
16925 && !sym
->attr
.untyped
)
16927 gfc_error ("Function %qs at %L has no IMPLICIT type",
16928 sym
->name
, &sym
->declared_at
);
16929 sym
->attr
.untyped
= 1;
16932 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16933 && !sym
->attr
.contained
16934 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16935 && gfc_check_symbol_access (sym
))
16937 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16938 "%L of PRIVATE type %qs", sym
->name
,
16939 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16943 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16945 if (el
->sym
->result
== el
->sym
16946 && el
->sym
->ts
.type
== BT_UNKNOWN
16947 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16948 && !el
->sym
->attr
.untyped
)
16950 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16951 el
->sym
->name
, &el
->sym
->declared_at
);
16952 el
->sym
->attr
.untyped
= 1;
16956 if (sym
->ts
.type
== BT_CHARACTER
)
16957 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16961 /* 12.3.2.1.1 Defined operators. */
16964 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16966 gfc_formal_arglist
*formal
;
16968 if (!sym
->attr
.function
)
16970 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16971 sym
->name
, &where
);
16975 if (sym
->ts
.type
== BT_CHARACTER
16976 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16977 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16978 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16980 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16981 "character length", sym
->name
, &where
);
16985 formal
= gfc_sym_get_dummy_args (sym
);
16986 if (!formal
|| !formal
->sym
)
16988 gfc_error ("User operator procedure %qs at %L must have at least "
16989 "one argument", sym
->name
, &where
);
16993 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16995 gfc_error ("First argument of operator interface at %L must be "
16996 "INTENT(IN)", &where
);
17000 if (formal
->sym
->attr
.optional
)
17002 gfc_error ("First argument of operator interface at %L cannot be "
17003 "optional", &where
);
17007 formal
= formal
->next
;
17008 if (!formal
|| !formal
->sym
)
17011 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17013 gfc_error ("Second argument of operator interface at %L must be "
17014 "INTENT(IN)", &where
);
17018 if (formal
->sym
->attr
.optional
)
17020 gfc_error ("Second argument of operator interface at %L cannot be "
17021 "optional", &where
);
17027 gfc_error ("Operator interface at %L must have, at most, two "
17028 "arguments", &where
);
17036 gfc_resolve_uops (gfc_symtree
*symtree
)
17038 gfc_interface
*itr
;
17040 if (symtree
== NULL
)
17043 gfc_resolve_uops (symtree
->left
);
17044 gfc_resolve_uops (symtree
->right
);
17046 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17047 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17051 /* Examine all of the expressions associated with a program unit,
17052 assign types to all intermediate expressions, make sure that all
17053 assignments are to compatible types and figure out which names
17054 refer to which functions or subroutines. It doesn't check code
17055 block, which is handled by gfc_resolve_code. */
17058 resolve_types (gfc_namespace
*ns
)
17064 gfc_namespace
* old_ns
= gfc_current_ns
;
17066 if (ns
->types_resolved
)
17069 /* Check that all IMPLICIT types are ok. */
17070 if (!ns
->seen_implicit_none
)
17073 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17074 if (ns
->set_flag
[letter
]
17075 && !resolve_typespec_used (&ns
->default_type
[letter
],
17076 &ns
->implicit_loc
[letter
], NULL
))
17080 gfc_current_ns
= ns
;
17082 resolve_entries (ns
);
17084 resolve_common_vars (&ns
->blank_common
, false);
17085 resolve_common_blocks (ns
->common_root
);
17087 resolve_contained_functions (ns
);
17089 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17090 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17091 resolve_formal_arglist (ns
->proc_name
);
17093 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17095 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17096 resolve_charlen (cl
);
17098 gfc_traverse_ns (ns
, resolve_symbol
);
17100 resolve_fntype (ns
);
17102 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17104 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17105 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17106 "also be PURE", n
->proc_name
->name
,
17107 &n
->proc_name
->declared_at
);
17113 gfc_do_concurrent_flag
= 0;
17114 gfc_check_interfaces (ns
);
17116 gfc_traverse_ns (ns
, resolve_values
);
17118 if (ns
->save_all
|| !flag_automatic
)
17122 for (d
= ns
->data
; d
; d
= d
->next
)
17126 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17128 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17130 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17131 resolve_equivalence (eq
);
17133 /* Warn about unused labels. */
17134 if (warn_unused_label
)
17135 warn_unused_fortran_label (ns
->st_labels
);
17137 gfc_resolve_uops (ns
->uop_root
);
17139 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17141 gfc_resolve_omp_declare_simd (ns
);
17143 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17145 ns
->types_resolved
= 1;
17147 gfc_current_ns
= old_ns
;
17151 /* Call gfc_resolve_code recursively. */
17154 resolve_codes (gfc_namespace
*ns
)
17157 bitmap_obstack old_obstack
;
17159 if (ns
->resolved
== 1)
17162 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17165 gfc_current_ns
= ns
;
17167 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17168 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17171 /* Set to an out of range value. */
17172 current_entry_id
= -1;
17174 old_obstack
= labels_obstack
;
17175 bitmap_obstack_initialize (&labels_obstack
);
17177 gfc_resolve_oacc_declare (ns
);
17178 gfc_resolve_oacc_routines (ns
);
17179 gfc_resolve_omp_local_vars (ns
);
17180 gfc_resolve_code (ns
->code
, ns
);
17182 bitmap_obstack_release (&labels_obstack
);
17183 labels_obstack
= old_obstack
;
17187 /* This function is called after a complete program unit has been compiled.
17188 Its purpose is to examine all of the expressions associated with a program
17189 unit, assign types to all intermediate expressions, make sure that all
17190 assignments are to compatible types and figure out which names refer to
17191 which functions or subroutines. */
17194 gfc_resolve (gfc_namespace
*ns
)
17196 gfc_namespace
*old_ns
;
17197 code_stack
*old_cs_base
;
17198 struct gfc_omp_saved_state old_omp_state
;
17204 old_ns
= gfc_current_ns
;
17205 old_cs_base
= cs_base
;
17207 /* As gfc_resolve can be called during resolution of an OpenMP construct
17208 body, we should clear any state associated to it, so that say NS's
17209 DO loops are not interpreted as OpenMP loops. */
17210 if (!ns
->construct_entities
)
17211 gfc_omp_save_and_clear_state (&old_omp_state
);
17213 resolve_types (ns
);
17214 component_assignment_level
= 0;
17215 resolve_codes (ns
);
17217 gfc_current_ns
= old_ns
;
17218 cs_base
= old_cs_base
;
17221 gfc_run_passes (ns
);
17223 if (!ns
->construct_entities
)
17224 gfc_omp_restore_state (&old_omp_state
);