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
;
8840 if (tsym
->attr
.subroutine
8841 || tsym
->attr
.external
8842 || (tsym
->attr
.function
8843 && (tsym
->result
!= tsym
|| tsym
->attr
.recursive
)))
8845 gfc_error ("Associating entity %qs at %L is a procedure name",
8846 tsym
->name
, &target
->where
);
8850 if (gfc_expr_attr (target
).proc_pointer
)
8852 gfc_error ("Associating entity %qs at %L is a procedure pointer",
8853 tsym
->name
, &target
->where
);
8857 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8858 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8860 sym
->attr
.target
= tsym
->attr
.target
8861 || gfc_expr_attr (target
).pointer
;
8862 if (is_subref_array (target
))
8863 sym
->attr
.subref_array_pointer
= 1;
8865 else if (target
->ts
.type
== BT_PROCEDURE
)
8867 gfc_error ("Associating selector-expression at %L yields a procedure",
8872 if (target
->expr_type
== EXPR_NULL
)
8874 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8877 else if (target
->ts
.type
== BT_UNKNOWN
)
8879 gfc_error ("Selector at %L has no type", &target
->where
);
8883 /* Get type if this was not already set. Note that it can be
8884 some other type than the target in case this is a SELECT TYPE
8885 selector! So we must not update when the type is already there. */
8886 if (sym
->ts
.type
== BT_UNKNOWN
)
8887 sym
->ts
= target
->ts
;
8889 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8891 /* See if this is a valid association-to-variable. */
8892 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8893 && !gfc_has_vector_subscript (target
));
8895 /* Finally resolve if this is an array or not. */
8896 if (sym
->attr
.dimension
&& target
->rank
== 0)
8898 /* primary.c makes the assumption that a reference to an associate
8899 name followed by a left parenthesis is an array reference. */
8900 if (sym
->ts
.type
!= BT_CHARACTER
)
8901 gfc_error ("Associate-name %qs at %L is used as array",
8902 sym
->name
, &sym
->declared_at
);
8903 sym
->attr
.dimension
= 0;
8908 /* We cannot deal with class selectors that need temporaries. */
8909 if (target
->ts
.type
== BT_CLASS
8910 && gfc_ref_needs_temporary_p (target
->ref
))
8912 gfc_error ("CLASS selector at %L needs a temporary which is not "
8913 "yet implemented", &target
->where
);
8917 if (target
->ts
.type
== BT_CLASS
)
8918 gfc_fix_class_refs (target
);
8920 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8923 /* The rank may be incorrectly guessed at parsing, therefore make sure
8924 it is corrected now. */
8925 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8928 sym
->as
= gfc_get_array_spec ();
8930 as
->rank
= target
->rank
;
8931 as
->type
= AS_DEFERRED
;
8932 as
->corank
= gfc_get_corank (target
);
8933 sym
->attr
.dimension
= 1;
8934 if (as
->corank
!= 0)
8935 sym
->attr
.codimension
= 1;
8937 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8939 if (!CLASS_DATA (sym
)->as
)
8940 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8941 as
= CLASS_DATA (sym
)->as
;
8942 as
->rank
= target
->rank
;
8943 as
->type
= AS_DEFERRED
;
8944 as
->corank
= gfc_get_corank (target
);
8945 CLASS_DATA (sym
)->attr
.dimension
= 1;
8946 if (as
->corank
!= 0)
8947 CLASS_DATA (sym
)->attr
.codimension
= 1;
8950 else if (!sym
->attr
.select_rank_temporary
)
8952 /* target's rank is 0, but the type of the sym is still array valued,
8953 which has to be corrected. */
8954 if (sym
->ts
.type
== BT_CLASS
8955 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8958 symbol_attribute attr
;
8959 /* The associated variable's type is still the array type
8960 correct this now. */
8961 gfc_typespec
*ts
= &target
->ts
;
8964 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8969 ts
= &ref
->u
.c
.component
->ts
;
8972 if (ts
->type
== BT_CLASS
)
8973 ts
= &ts
->u
.derived
->components
->ts
;
8979 /* Create a scalar instance of the current class type. Because the
8980 rank of a class array goes into its name, the type has to be
8981 rebuild. The alternative of (re-)setting just the attributes
8982 and as in the current type, destroys the type also in other
8986 sym
->ts
.type
= BT_CLASS
;
8987 attr
= CLASS_DATA (sym
)->attr
;
8989 attr
.associate_var
= 1;
8990 attr
.dimension
= attr
.codimension
= 0;
8991 attr
.class_pointer
= 1;
8992 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8994 /* Make sure the _vptr is set. */
8995 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8996 if (c
->ts
.u
.derived
== NULL
)
8997 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8998 CLASS_DATA (sym
)->attr
.pointer
= 1;
8999 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
9000 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
9001 gfc_commit_symbol (sym
->ts
.u
.derived
);
9002 /* _vptr now has the _vtab in it, change it to the _vtype. */
9003 if (c
->ts
.u
.derived
->attr
.vtab
)
9004 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
9005 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
9006 resolve_types (c
->ts
.u
.derived
->ns
);
9010 /* Mark this as an associate variable. */
9011 sym
->attr
.associate_var
= 1;
9013 /* Fix up the type-spec for CHARACTER types. */
9014 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9017 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9019 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9020 && target
->symtree
->n
.sym
->attr
.dummy
9021 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9023 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9024 sym
->ts
.deferred
= 1;
9027 if (!sym
->ts
.u
.cl
->length
9028 && !sym
->ts
.deferred
9029 && target
->expr_type
== EXPR_CONSTANT
)
9031 sym
->ts
.u
.cl
->length
=
9032 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9033 target
->value
.character
.length
);
9035 else if ((!sym
->ts
.u
.cl
->length
9036 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9037 && target
->expr_type
!= EXPR_VARIABLE
)
9039 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9040 sym
->ts
.deferred
= 1;
9042 /* This is reset in trans-stmt.c after the assignment
9043 of the target expression to the associate name. */
9044 sym
->attr
.allocatable
= 1;
9048 /* If the target is a good class object, so is the associate variable. */
9049 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9050 sym
->attr
.class_ok
= 1;
9054 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9055 array reference, where necessary. The symbols are artificial and so
9056 the dimension attribute and arrayspec can also be set. In addition,
9057 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9058 This is corrected here as well.*/
9061 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9062 int rank
, gfc_ref
*ref
)
9064 gfc_ref
*nref
= (*expr1
)->ref
;
9065 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9066 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9067 (*expr1
)->rank
= rank
;
9068 if (sym1
->ts
.type
== BT_CLASS
)
9070 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9071 (*expr1
)->ts
= sym1
->ts
;
9073 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9074 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9075 CLASS_DATA (sym1
)->as
9076 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9080 sym1
->attr
.dimension
= 1;
9081 if (sym1
->as
== NULL
&& sym2
)
9082 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9085 for (; nref
; nref
= nref
->next
)
9086 if (nref
->next
== NULL
)
9089 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9090 nref
->next
= gfc_copy_ref (ref
);
9091 else if (ref
&& !nref
)
9092 (*expr1
)->ref
= gfc_copy_ref (ref
);
9097 build_loc_call (gfc_expr
*sym_expr
)
9100 loc_call
= gfc_get_expr ();
9101 loc_call
->expr_type
= EXPR_FUNCTION
;
9102 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9103 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9104 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9105 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9106 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9107 loc_call
->ts
.type
= BT_INTEGER
;
9108 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9109 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9110 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9111 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9112 loc_call
->where
= sym_expr
->where
;
9116 /* Resolve a SELECT TYPE statement. */
9119 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9121 gfc_symbol
*selector_type
;
9122 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9123 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9126 char name
[GFC_MAX_SYMBOL_LEN
];
9130 gfc_ref
* ref
= NULL
;
9131 gfc_expr
*selector_expr
= NULL
;
9133 ns
= code
->ext
.block
.ns
;
9136 /* Check for F03:C813. */
9137 if (code
->expr1
->ts
.type
!= BT_CLASS
9138 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9140 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9141 "at %L", &code
->loc
);
9145 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9150 gfc_ref
*ref2
= NULL
;
9151 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9152 if (ref
->type
== REF_COMPONENT
9153 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9158 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9159 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9160 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9164 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9165 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9166 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9169 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9170 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9172 /* F2008: C803 The selector expression must not be coindexed. */
9173 if (gfc_is_coindexed (code
->expr2
))
9175 gfc_error ("Selector at %L must not be coindexed",
9176 &code
->expr2
->where
);
9183 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9185 if (gfc_is_coindexed (code
->expr1
))
9187 gfc_error ("Selector at %L must not be coindexed",
9188 &code
->expr1
->where
);
9193 /* Loop over TYPE IS / CLASS IS cases. */
9194 for (body
= code
->block
; body
; body
= body
->block
)
9196 c
= body
->ext
.block
.case_list
;
9200 /* Check for repeated cases. */
9201 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9203 gfc_case
*d
= tail
->ext
.block
.case_list
;
9207 if (c
->ts
.type
== d
->ts
.type
9208 && ((c
->ts
.type
== BT_DERIVED
9209 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9210 && !strcmp (c
->ts
.u
.derived
->name
,
9211 d
->ts
.u
.derived
->name
))
9212 || c
->ts
.type
== BT_UNKNOWN
9213 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9214 && c
->ts
.kind
== d
->ts
.kind
)))
9216 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9217 &c
->where
, &d
->where
);
9223 /* Check F03:C815. */
9224 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9225 && !selector_type
->attr
.unlimited_polymorphic
9226 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9228 gfc_error ("Derived type %qs at %L must be extensible",
9229 c
->ts
.u
.derived
->name
, &c
->where
);
9234 /* Check F03:C816. */
9235 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9236 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9237 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9239 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9240 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9241 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9243 gfc_error ("Unexpected intrinsic type %qs at %L",
9244 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9249 /* Check F03:C814. */
9250 if (c
->ts
.type
== BT_CHARACTER
9251 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9253 gfc_error ("The type-spec at %L shall specify that each length "
9254 "type parameter is assumed", &c
->where
);
9259 /* Intercept the DEFAULT case. */
9260 if (c
->ts
.type
== BT_UNKNOWN
)
9262 /* Check F03:C818. */
9265 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9266 "by a second DEFAULT CASE at %L",
9267 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9272 default_case
= body
;
9279 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9280 target if present. If there are any EXIT statements referring to the
9281 SELECT TYPE construct, this is no problem because the gfc_code
9282 reference stays the same and EXIT is equally possible from the BLOCK
9283 it is changed to. */
9284 code
->op
= EXEC_BLOCK
;
9287 gfc_association_list
* assoc
;
9289 assoc
= gfc_get_association_list ();
9290 assoc
->st
= code
->expr1
->symtree
;
9291 assoc
->target
= gfc_copy_expr (code
->expr2
);
9292 assoc
->target
->where
= code
->expr2
->where
;
9293 /* assoc->variable will be set by resolve_assoc_var. */
9295 code
->ext
.block
.assoc
= assoc
;
9296 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9298 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9301 code
->ext
.block
.assoc
= NULL
;
9303 /* Ensure that the selector rank and arrayspec are available to
9304 correct expressions in which they might be missing. */
9305 if (code
->expr2
&& code
->expr2
->rank
)
9307 rank
= code
->expr2
->rank
;
9308 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9309 if (ref
->next
== NULL
)
9311 if (ref
&& ref
->type
== REF_ARRAY
)
9312 ref
= gfc_copy_ref (ref
);
9314 /* Fixup expr1 if necessary. */
9316 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9318 else if (code
->expr1
->rank
)
9320 rank
= code
->expr1
->rank
;
9321 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9322 if (ref
->next
== NULL
)
9324 if (ref
&& ref
->type
== REF_ARRAY
)
9325 ref
= gfc_copy_ref (ref
);
9328 /* Add EXEC_SELECT to switch on type. */
9329 new_st
= gfc_get_code (code
->op
);
9330 new_st
->expr1
= code
->expr1
;
9331 new_st
->expr2
= code
->expr2
;
9332 new_st
->block
= code
->block
;
9333 code
->expr1
= code
->expr2
= NULL
;
9338 ns
->code
->next
= new_st
;
9340 code
->op
= EXEC_SELECT_TYPE
;
9342 /* Use the intrinsic LOC function to generate an integer expression
9343 for the vtable of the selector. Note that the rank of the selector
9344 expression has to be set to zero. */
9345 gfc_add_vptr_component (code
->expr1
);
9346 code
->expr1
->rank
= 0;
9347 code
->expr1
= build_loc_call (code
->expr1
);
9348 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9350 /* Loop over TYPE IS / CLASS IS cases. */
9351 for (body
= code
->block
; body
; body
= body
->block
)
9355 c
= body
->ext
.block
.case_list
;
9357 /* Generate an index integer expression for address of the
9358 TYPE/CLASS vtable and store it in c->low. The hash expression
9359 is stored in c->high and is used to resolve intrinsic cases. */
9360 if (c
->ts
.type
!= BT_UNKNOWN
)
9362 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9364 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9366 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9367 c
->ts
.u
.derived
->hash_value
);
9371 vtab
= gfc_find_vtab (&c
->ts
);
9372 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9373 e
= CLASS_DATA (vtab
)->initializer
;
9374 c
->high
= gfc_copy_expr (e
);
9375 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9378 ts
.kind
= gfc_integer_4_kind
;
9379 ts
.type
= BT_INTEGER
;
9380 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9384 e
= gfc_lval_expr_from_sym (vtab
);
9385 c
->low
= build_loc_call (e
);
9390 /* Associate temporary to selector. This should only be done
9391 when this case is actually true, so build a new ASSOCIATE
9392 that does precisely this here (instead of using the
9395 if (c
->ts
.type
== BT_CLASS
)
9396 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9397 else if (c
->ts
.type
== BT_DERIVED
)
9398 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9399 else if (c
->ts
.type
== BT_CHARACTER
)
9401 HOST_WIDE_INT charlen
= 0;
9402 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9403 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9404 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9405 snprintf (name
, sizeof (name
),
9406 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9407 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9410 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9413 st
= gfc_find_symtree (ns
->sym_root
, name
);
9414 gcc_assert (st
->n
.sym
->assoc
);
9415 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9416 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9417 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9419 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9420 /* Fixup the target expression if necessary. */
9422 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9425 new_st
= gfc_get_code (EXEC_BLOCK
);
9426 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9427 new_st
->ext
.block
.ns
->code
= body
->next
;
9428 body
->next
= new_st
;
9430 /* Chain in the new list only if it is marked as dangling. Otherwise
9431 there is a CASE label overlap and this is already used. Just ignore,
9432 the error is diagnosed elsewhere. */
9433 if (st
->n
.sym
->assoc
->dangling
)
9435 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9436 st
->n
.sym
->assoc
->dangling
= 0;
9439 resolve_assoc_var (st
->n
.sym
, false);
9442 /* Take out CLASS IS cases for separate treatment. */
9444 while (body
&& body
->block
)
9446 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9448 /* Add to class_is list. */
9449 if (class_is
== NULL
)
9451 class_is
= body
->block
;
9456 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9457 tail
->block
= body
->block
;
9460 /* Remove from EXEC_SELECT list. */
9461 body
->block
= body
->block
->block
;
9474 /* Add a default case to hold the CLASS IS cases. */
9475 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9476 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9478 tail
->ext
.block
.case_list
= gfc_get_case ();
9479 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9481 default_case
= tail
;
9484 /* More than one CLASS IS block? */
9485 if (class_is
->block
)
9489 /* Sort CLASS IS blocks by extension level. */
9493 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9496 /* F03:C817 (check for doubles). */
9497 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9498 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9500 gfc_error ("Double CLASS IS block in SELECT TYPE "
9502 &c2
->ext
.block
.case_list
->where
);
9505 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9506 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9509 (*c1
)->block
= c2
->block
;
9519 /* Generate IF chain. */
9520 if_st
= gfc_get_code (EXEC_IF
);
9522 for (body
= class_is
; body
; body
= body
->block
)
9524 new_st
->block
= gfc_get_code (EXEC_IF
);
9525 new_st
= new_st
->block
;
9526 /* Set up IF condition: Call _gfortran_is_extension_of. */
9527 new_st
->expr1
= gfc_get_expr ();
9528 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9529 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9530 new_st
->expr1
->ts
.kind
= 4;
9531 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9532 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9533 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9534 /* Set up arguments. */
9535 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9536 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9537 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9538 new_st
->expr1
->where
= code
->loc
;
9539 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9540 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9541 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9542 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9543 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9544 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9545 new_st
->next
= body
->next
;
9547 if (default_case
->next
)
9549 new_st
->block
= gfc_get_code (EXEC_IF
);
9550 new_st
= new_st
->block
;
9551 new_st
->next
= default_case
->next
;
9554 /* Replace CLASS DEFAULT code by the IF chain. */
9555 default_case
->next
= if_st
;
9558 /* Resolve the internal code. This cannot be done earlier because
9559 it requires that the sym->assoc of selectors is set already. */
9560 gfc_current_ns
= ns
;
9561 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9562 gfc_current_ns
= old_ns
;
9569 /* Resolve a SELECT RANK statement. */
9572 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9575 gfc_code
*body
, *new_st
, *tail
;
9577 char tname
[GFC_MAX_SYMBOL_LEN
];
9578 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9580 gfc_expr
*selector_expr
= NULL
;
9582 HOST_WIDE_INT charlen
= 0;
9584 ns
= code
->ext
.block
.ns
;
9587 code
->op
= EXEC_BLOCK
;
9590 gfc_association_list
* assoc
;
9592 assoc
= gfc_get_association_list ();
9593 assoc
->st
= code
->expr1
->symtree
;
9594 assoc
->target
= gfc_copy_expr (code
->expr2
);
9595 assoc
->target
->where
= code
->expr2
->where
;
9596 /* assoc->variable will be set by resolve_assoc_var. */
9598 code
->ext
.block
.assoc
= assoc
;
9599 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9601 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9604 code
->ext
.block
.assoc
= NULL
;
9606 /* Loop over RANK cases. Note that returning on the errors causes a
9607 cascade of further errors because the case blocks do not compile
9609 for (body
= code
->block
; body
; body
= body
->block
)
9611 c
= body
->ext
.block
.case_list
;
9613 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9617 /* Check for repeated cases. */
9618 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9620 gfc_case
*d
= tail
->ext
.block
.case_list
;
9626 /* Check F2018: C1153. */
9627 if (!c
->low
&& !d
->low
)
9628 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9629 &c
->where
, &d
->where
);
9631 if (!c
->low
|| !d
->low
)
9634 /* Check F2018: C1153. */
9635 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9636 if ((case_value
== case_value2
) && case_value
== -1)
9637 gfc_error ("RANK (*) at %L is repeated at %L",
9638 &c
->where
, &d
->where
);
9639 else if (case_value
== case_value2
)
9640 gfc_error ("RANK (%i) at %L is repeated at %L",
9641 case_value
, &c
->where
, &d
->where
);
9647 /* Check F2018: C1155. */
9648 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9649 || gfc_expr_attr (code
->expr1
).pointer
))
9650 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9651 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9653 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9654 || gfc_expr_attr (code
->expr1
).pointer
))
9655 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9656 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9659 /* Add EXEC_SELECT to switch on rank. */
9660 new_st
= gfc_get_code (code
->op
);
9661 new_st
->expr1
= code
->expr1
;
9662 new_st
->expr2
= code
->expr2
;
9663 new_st
->block
= code
->block
;
9664 code
->expr1
= code
->expr2
= NULL
;
9669 ns
->code
->next
= new_st
;
9671 code
->op
= EXEC_SELECT_RANK
;
9673 selector_expr
= code
->expr1
;
9675 /* Loop over SELECT RANK cases. */
9676 for (body
= code
->block
; body
; body
= body
->block
)
9678 c
= body
->ext
.block
.case_list
;
9681 /* Pass on the default case. */
9685 /* Associate temporary to selector. This should only be done
9686 when this case is actually true, so build a new ASSOCIATE
9687 that does precisely this here (instead of using the
9689 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9690 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9691 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9693 if (c
->ts
.type
== BT_CLASS
)
9694 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9695 else if (c
->ts
.type
== BT_DERIVED
)
9696 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9697 else if (c
->ts
.type
!= BT_CHARACTER
)
9698 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9700 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9701 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9703 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9704 if (case_value
>= 0)
9705 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9707 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9709 st
= gfc_find_symtree (ns
->sym_root
, name
);
9710 gcc_assert (st
->n
.sym
->assoc
);
9712 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9713 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9715 new_st
= gfc_get_code (EXEC_BLOCK
);
9716 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9717 new_st
->ext
.block
.ns
->code
= body
->next
;
9718 body
->next
= new_st
;
9720 /* Chain in the new list only if it is marked as dangling. Otherwise
9721 there is a CASE label overlap and this is already used. Just ignore,
9722 the error is diagnosed elsewhere. */
9723 if (st
->n
.sym
->assoc
->dangling
)
9725 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9726 st
->n
.sym
->assoc
->dangling
= 0;
9729 resolve_assoc_var (st
->n
.sym
, false);
9732 gfc_current_ns
= ns
;
9733 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9734 gfc_current_ns
= old_ns
;
9738 /* Resolve a transfer statement. This is making sure that:
9739 -- a derived type being transferred has only non-pointer components
9740 -- a derived type being transferred doesn't have private components, unless
9741 it's being transferred from the module where the type was defined
9742 -- we're not trying to transfer a whole assumed size array. */
9745 resolve_transfer (gfc_code
*code
)
9747 gfc_symbol
*sym
, *derived
;
9751 bool formatted
= false;
9752 gfc_dt
*dt
= code
->ext
.dt
;
9753 gfc_symbol
*dtio_sub
= NULL
;
9757 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9758 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9759 exp
= exp
->value
.op
.op1
;
9761 if (exp
&& exp
->expr_type
== EXPR_NULL
9764 gfc_error ("Invalid context for NULL () intrinsic at %L",
9769 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9770 && exp
->expr_type
!= EXPR_FUNCTION
9771 && exp
->expr_type
!= EXPR_STRUCTURE
))
9774 /* If we are reading, the variable will be changed. Note that
9775 code->ext.dt may be NULL if the TRANSFER is related to
9776 an INQUIRE statement -- but in this case, we are not reading, either. */
9777 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9778 && !gfc_check_vardef_context (exp
, false, false, false,
9782 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9783 || exp
->expr_type
== EXPR_FUNCTION
9784 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9786 /* Go to actual component transferred. */
9787 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9788 if (ref
->type
== REF_COMPONENT
)
9789 ts
= &ref
->u
.c
.component
->ts
;
9791 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9792 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9794 derived
= ts
->u
.derived
;
9796 /* Determine when to use the formatted DTIO procedure. */
9797 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9800 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9801 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9802 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9804 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9807 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9808 /* Check to see if this is a nested DTIO call, with the
9809 dummy as the io-list object. */
9810 if (sym
&& sym
== dtio_sub
&& sym
->formal
9811 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9812 && exp
->ref
== NULL
)
9814 if (!sym
->attr
.recursive
)
9816 gfc_error ("DTIO %s procedure at %L must be recursive",
9817 sym
->name
, &sym
->declared_at
);
9824 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9826 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9827 "it is processed by a defined input/output procedure",
9832 if (ts
->type
== BT_DERIVED
)
9834 /* Check that transferred derived type doesn't contain POINTER
9835 components unless it is processed by a defined input/output
9837 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9839 gfc_error ("Data transfer element at %L cannot have POINTER "
9840 "components unless it is processed by a defined "
9841 "input/output procedure", &code
->loc
);
9846 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9848 gfc_error ("Data transfer element at %L cannot have "
9849 "procedure pointer components", &code
->loc
);
9853 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9855 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9856 "components unless it is processed by a defined "
9857 "input/output procedure", &code
->loc
);
9861 /* C_PTR and C_FUNPTR have private components which means they cannot
9862 be printed. However, if -std=gnu and not -pedantic, allow
9863 the component to be printed to help debugging. */
9864 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9866 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9867 "cannot have PRIVATE components", &code
->loc
))
9870 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9872 gfc_error ("Data transfer element at %L cannot have "
9873 "PRIVATE components unless it is processed by "
9874 "a defined input/output procedure", &code
->loc
);
9879 if (exp
->expr_type
== EXPR_STRUCTURE
)
9882 sym
= exp
->symtree
->n
.sym
;
9884 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9885 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9887 gfc_error ("Data transfer element at %L cannot be a full reference to "
9888 "an assumed-size array", &code
->loc
);
9892 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9893 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9897 /*********** Toplevel code resolution subroutines ***********/
9899 /* Find the set of labels that are reachable from this block. We also
9900 record the last statement in each block. */
9903 find_reachable_labels (gfc_code
*block
)
9910 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9912 /* Collect labels in this block. We don't keep those corresponding
9913 to END {IF|SELECT}, these are checked in resolve_branch by going
9914 up through the code_stack. */
9915 for (c
= block
; c
; c
= c
->next
)
9917 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9918 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9921 /* Merge with labels from parent block. */
9924 gcc_assert (cs_base
->prev
->reachable_labels
);
9925 bitmap_ior_into (cs_base
->reachable_labels
,
9926 cs_base
->prev
->reachable_labels
);
9932 resolve_lock_unlock_event (gfc_code
*code
)
9934 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9935 && code
->expr1
->value
.function
.isym
9936 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9937 remove_caf_get_intrinsic (code
->expr1
);
9939 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9940 && (code
->expr1
->ts
.type
!= BT_DERIVED
9941 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9942 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9943 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9944 || code
->expr1
->rank
!= 0
9945 || (!gfc_is_coarray (code
->expr1
) &&
9946 !gfc_is_coindexed (code
->expr1
))))
9947 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9948 &code
->expr1
->where
);
9949 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9950 && (code
->expr1
->ts
.type
!= BT_DERIVED
9951 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9952 || code
->expr1
->ts
.u
.derived
->from_intmod
9953 != INTMOD_ISO_FORTRAN_ENV
9954 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9955 != ISOFORTRAN_EVENT_TYPE
9956 || code
->expr1
->rank
!= 0))
9957 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9958 &code
->expr1
->where
);
9959 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9960 && !gfc_is_coindexed (code
->expr1
))
9961 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9962 &code
->expr1
->where
);
9963 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9964 gfc_error ("Event variable argument at %L must be a coarray but not "
9965 "coindexed", &code
->expr1
->where
);
9969 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9970 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9971 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9972 &code
->expr2
->where
);
9975 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9976 _("STAT variable")))
9981 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9982 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9983 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9984 &code
->expr3
->where
);
9987 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9988 _("ERRMSG variable")))
9991 /* Check for LOCK the ACQUIRED_LOCK. */
9992 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9993 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9994 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9995 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9996 "variable", &code
->expr4
->where
);
9998 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9999 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
10000 _("ACQUIRED_LOCK variable")))
10003 /* Check for EVENT WAIT the UNTIL_COUNT. */
10004 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
10006 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
10007 || code
->expr4
->rank
!= 0)
10008 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
10009 "expression", &code
->expr4
->where
);
10015 resolve_critical (gfc_code
*code
)
10017 gfc_symtree
*symtree
;
10018 gfc_symbol
*lock_type
;
10019 char name
[GFC_MAX_SYMBOL_LEN
];
10020 static int serial
= 0;
10022 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10025 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10026 GFC_PREFIX ("lock_type"));
10028 lock_type
= symtree
->n
.sym
;
10031 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10033 gcc_unreachable ();
10034 lock_type
= symtree
->n
.sym
;
10035 lock_type
->attr
.flavor
= FL_DERIVED
;
10036 lock_type
->attr
.zero_comp
= 1;
10037 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10038 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10041 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10042 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10043 gcc_unreachable ();
10045 code
->resolved_sym
= symtree
->n
.sym
;
10046 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10047 symtree
->n
.sym
->attr
.referenced
= 1;
10048 symtree
->n
.sym
->attr
.artificial
= 1;
10049 symtree
->n
.sym
->attr
.codimension
= 1;
10050 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10051 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10052 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10053 symtree
->n
.sym
->as
->corank
= 1;
10054 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10055 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10056 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10058 gfc_commit_symbols();
10063 resolve_sync (gfc_code
*code
)
10065 /* Check imageset. The * case matches expr1 == NULL. */
10068 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10069 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10070 "INTEGER expression", &code
->expr1
->where
);
10071 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10072 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10073 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10074 &code
->expr1
->where
);
10075 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10076 && gfc_simplify_expr (code
->expr1
, 0))
10078 gfc_constructor
*cons
;
10079 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10080 for (; cons
; cons
= gfc_constructor_next (cons
))
10081 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10082 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10083 gfc_error ("Imageset argument at %L must between 1 and "
10084 "num_images()", &cons
->expr
->where
);
10089 gfc_resolve_expr (code
->expr2
);
10091 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10092 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10093 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10094 &code
->expr2
->where
);
10096 /* Check ERRMSG. */
10097 gfc_resolve_expr (code
->expr3
);
10099 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10100 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10101 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10102 &code
->expr3
->where
);
10106 /* Given a branch to a label, see if the branch is conforming.
10107 The code node describes where the branch is located. */
10110 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10117 /* Step one: is this a valid branching target? */
10119 if (label
->defined
== ST_LABEL_UNKNOWN
)
10121 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10126 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10128 gfc_error ("Statement at %L is not a valid branch target statement "
10129 "for the branch statement at %L", &label
->where
, &code
->loc
);
10133 /* Step two: make sure this branch is not a branch to itself ;-) */
10135 if (code
->here
== label
)
10138 "Branch at %L may result in an infinite loop", &code
->loc
);
10142 /* Step three: See if the label is in the same block as the
10143 branching statement. The hard work has been done by setting up
10144 the bitmap reachable_labels. */
10146 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10148 /* Check now whether there is a CRITICAL construct; if so, check
10149 whether the label is still visible outside of the CRITICAL block,
10150 which is invalid. */
10151 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10153 if (stack
->current
->op
== EXEC_CRITICAL
10154 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10155 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10156 "label at %L", &code
->loc
, &label
->where
);
10157 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10158 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10159 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10160 "for label at %L", &code
->loc
, &label
->where
);
10166 /* Step four: If we haven't found the label in the bitmap, it may
10167 still be the label of the END of the enclosing block, in which
10168 case we find it by going up the code_stack. */
10170 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10172 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10174 if (stack
->current
->op
== EXEC_CRITICAL
)
10176 /* Note: A label at END CRITICAL does not leave the CRITICAL
10177 construct as END CRITICAL is still part of it. */
10178 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10179 " at %L", &code
->loc
, &label
->where
);
10182 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10184 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10185 "label at %L", &code
->loc
, &label
->where
);
10192 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10196 /* The label is not in an enclosing block, so illegal. This was
10197 allowed in Fortran 66, so we allow it as extension. No
10198 further checks are necessary in this case. */
10199 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10200 "as the GOTO statement at %L", &label
->where
,
10206 /* Check whether EXPR1 has the same shape as EXPR2. */
10209 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10211 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10212 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10213 bool result
= false;
10216 /* Compare the rank. */
10217 if (expr1
->rank
!= expr2
->rank
)
10220 /* Compare the size of each dimension. */
10221 for (i
=0; i
<expr1
->rank
; i
++)
10223 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10226 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10229 if (mpz_cmp (shape
[i
], shape2
[i
]))
10233 /* When either of the two expression is an assumed size array, we
10234 ignore the comparison of dimension sizes. */
10239 gfc_clear_shape (shape
, i
);
10240 gfc_clear_shape (shape2
, i
);
10245 /* Check whether a WHERE assignment target or a WHERE mask expression
10246 has the same shape as the outmost WHERE mask expression. */
10249 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10253 gfc_expr
*e
= NULL
;
10255 cblock
= code
->block
;
10257 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10258 In case of nested WHERE, only the outmost one is stored. */
10259 if (mask
== NULL
) /* outmost WHERE */
10261 else /* inner WHERE */
10268 /* Check if the mask-expr has a consistent shape with the
10269 outmost WHERE mask-expr. */
10270 if (!resolve_where_shape (cblock
->expr1
, e
))
10271 gfc_error ("WHERE mask at %L has inconsistent shape",
10272 &cblock
->expr1
->where
);
10275 /* the assignment statement of a WHERE statement, or the first
10276 statement in where-body-construct of a WHERE construct */
10277 cnext
= cblock
->next
;
10282 /* WHERE assignment statement */
10285 /* Check shape consistent for WHERE assignment target. */
10286 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10287 gfc_error ("WHERE assignment target at %L has "
10288 "inconsistent shape", &cnext
->expr1
->where
);
10292 case EXEC_ASSIGN_CALL
:
10293 resolve_call (cnext
);
10294 if (!cnext
->resolved_sym
->attr
.elemental
)
10295 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10296 &cnext
->ext
.actual
->expr
->where
);
10299 /* WHERE or WHERE construct is part of a where-body-construct */
10301 resolve_where (cnext
, e
);
10305 gfc_error ("Unsupported statement inside WHERE at %L",
10308 /* the next statement within the same where-body-construct */
10309 cnext
= cnext
->next
;
10311 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10312 cblock
= cblock
->block
;
10317 /* Resolve assignment in FORALL construct.
10318 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10319 FORALL index variables. */
10322 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10326 for (n
= 0; n
< nvar
; n
++)
10328 gfc_symbol
*forall_index
;
10330 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10332 /* Check whether the assignment target is one of the FORALL index
10334 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10335 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10336 gfc_error ("Assignment to a FORALL index variable at %L",
10337 &code
->expr1
->where
);
10340 /* If one of the FORALL index variables doesn't appear in the
10341 assignment variable, then there could be a many-to-one
10342 assignment. Emit a warning rather than an error because the
10343 mask could be resolving this problem. */
10344 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10345 gfc_warning (0, "The FORALL with index %qs is not used on the "
10346 "left side of the assignment at %L and so might "
10347 "cause multiple assignment to this object",
10348 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10354 /* Resolve WHERE statement in FORALL construct. */
10357 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10358 gfc_expr
**var_expr
)
10363 cblock
= code
->block
;
10366 /* the assignment statement of a WHERE statement, or the first
10367 statement in where-body-construct of a WHERE construct */
10368 cnext
= cblock
->next
;
10373 /* WHERE assignment statement */
10375 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10378 /* WHERE operator assignment statement */
10379 case EXEC_ASSIGN_CALL
:
10380 resolve_call (cnext
);
10381 if (!cnext
->resolved_sym
->attr
.elemental
)
10382 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10383 &cnext
->ext
.actual
->expr
->where
);
10386 /* WHERE or WHERE construct is part of a where-body-construct */
10388 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10392 gfc_error ("Unsupported statement inside WHERE at %L",
10395 /* the next statement within the same where-body-construct */
10396 cnext
= cnext
->next
;
10398 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10399 cblock
= cblock
->block
;
10404 /* Traverse the FORALL body to check whether the following errors exist:
10405 1. For assignment, check if a many-to-one assignment happens.
10406 2. For WHERE statement, check the WHERE body to see if there is any
10407 many-to-one assignment. */
10410 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10414 c
= code
->block
->next
;
10420 case EXEC_POINTER_ASSIGN
:
10421 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10424 case EXEC_ASSIGN_CALL
:
10428 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10429 there is no need to handle it here. */
10433 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10438 /* The next statement in the FORALL body. */
10444 /* Counts the number of iterators needed inside a forall construct, including
10445 nested forall constructs. This is used to allocate the needed memory
10446 in gfc_resolve_forall. */
10449 gfc_count_forall_iterators (gfc_code
*code
)
10451 int max_iters
, sub_iters
, current_iters
;
10452 gfc_forall_iterator
*fa
;
10454 gcc_assert(code
->op
== EXEC_FORALL
);
10458 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10461 code
= code
->block
->next
;
10465 if (code
->op
== EXEC_FORALL
)
10467 sub_iters
= gfc_count_forall_iterators (code
);
10468 if (sub_iters
> max_iters
)
10469 max_iters
= sub_iters
;
10474 return current_iters
+ max_iters
;
10478 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10479 gfc_resolve_forall_body to resolve the FORALL body. */
10482 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10484 static gfc_expr
**var_expr
;
10485 static int total_var
= 0;
10486 static int nvar
= 0;
10487 int i
, old_nvar
, tmp
;
10488 gfc_forall_iterator
*fa
;
10492 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10495 /* Start to resolve a FORALL construct */
10496 if (forall_save
== 0)
10498 /* Count the total number of FORALL indices in the nested FORALL
10499 construct in order to allocate the VAR_EXPR with proper size. */
10500 total_var
= gfc_count_forall_iterators (code
);
10502 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10503 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10506 /* The information about FORALL iterator, including FORALL indices start, end
10507 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10508 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10510 /* Fortran 20008: C738 (R753). */
10511 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10513 gfc_error ("FORALL index-name at %L must be a scalar variable "
10514 "of type integer", &fa
->var
->where
);
10518 /* Check if any outer FORALL index name is the same as the current
10520 for (i
= 0; i
< nvar
; i
++)
10522 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10523 gfc_error ("An outer FORALL construct already has an index "
10524 "with this name %L", &fa
->var
->where
);
10527 /* Record the current FORALL index. */
10528 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10532 /* No memory leak. */
10533 gcc_assert (nvar
<= total_var
);
10536 /* Resolve the FORALL body. */
10537 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10539 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10540 gfc_resolve_blocks (code
->block
, ns
);
10544 /* Free only the VAR_EXPRs allocated in this frame. */
10545 for (i
= nvar
; i
< tmp
; i
++)
10546 gfc_free_expr (var_expr
[i
]);
10550 /* We are in the outermost FORALL construct. */
10551 gcc_assert (forall_save
== 0);
10553 /* VAR_EXPR is not needed any more. */
10560 /* Resolve a BLOCK construct statement. */
10563 resolve_block_construct (gfc_code
* code
)
10565 /* Resolve the BLOCK's namespace. */
10566 gfc_resolve (code
->ext
.block
.ns
);
10568 /* For an ASSOCIATE block, the associations (and their targets) are already
10569 resolved during resolve_symbol. */
10573 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10577 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10581 for (; b
; b
= b
->block
)
10583 t
= gfc_resolve_expr (b
->expr1
);
10584 if (!gfc_resolve_expr (b
->expr2
))
10590 if (t
&& b
->expr1
!= NULL
10591 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10592 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10598 && b
->expr1
!= NULL
10599 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10600 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10605 resolve_branch (b
->label1
, b
);
10609 resolve_block_construct (b
);
10613 case EXEC_SELECT_TYPE
:
10614 case EXEC_SELECT_RANK
:
10617 case EXEC_DO_WHILE
:
10618 case EXEC_DO_CONCURRENT
:
10619 case EXEC_CRITICAL
:
10622 case EXEC_IOLENGTH
:
10626 case EXEC_OMP_ATOMIC
:
10627 case EXEC_OACC_ATOMIC
:
10629 gfc_omp_atomic_op aop
10630 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10632 /* Verify this before calling gfc_resolve_code, which might
10634 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10635 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10636 && b
->next
->next
== NULL
)
10637 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10638 && b
->next
->next
!= NULL
10639 && b
->next
->next
->op
== EXEC_ASSIGN
10640 && b
->next
->next
->next
== NULL
));
10644 case EXEC_OACC_PARALLEL_LOOP
:
10645 case EXEC_OACC_PARALLEL
:
10646 case EXEC_OACC_KERNELS_LOOP
:
10647 case EXEC_OACC_KERNELS
:
10648 case EXEC_OACC_SERIAL_LOOP
:
10649 case EXEC_OACC_SERIAL
:
10650 case EXEC_OACC_DATA
:
10651 case EXEC_OACC_HOST_DATA
:
10652 case EXEC_OACC_LOOP
:
10653 case EXEC_OACC_UPDATE
:
10654 case EXEC_OACC_WAIT
:
10655 case EXEC_OACC_CACHE
:
10656 case EXEC_OACC_ENTER_DATA
:
10657 case EXEC_OACC_EXIT_DATA
:
10658 case EXEC_OACC_ROUTINE
:
10659 case EXEC_OMP_CRITICAL
:
10660 case EXEC_OMP_DISTRIBUTE
:
10661 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10662 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10663 case EXEC_OMP_DISTRIBUTE_SIMD
:
10665 case EXEC_OMP_DO_SIMD
:
10666 case EXEC_OMP_MASTER
:
10667 case EXEC_OMP_ORDERED
:
10668 case EXEC_OMP_PARALLEL
:
10669 case EXEC_OMP_PARALLEL_DO
:
10670 case EXEC_OMP_PARALLEL_DO_SIMD
:
10671 case EXEC_OMP_PARALLEL_SECTIONS
:
10672 case EXEC_OMP_PARALLEL_WORKSHARE
:
10673 case EXEC_OMP_SECTIONS
:
10674 case EXEC_OMP_SIMD
:
10675 case EXEC_OMP_SINGLE
:
10676 case EXEC_OMP_TARGET
:
10677 case EXEC_OMP_TARGET_DATA
:
10678 case EXEC_OMP_TARGET_ENTER_DATA
:
10679 case EXEC_OMP_TARGET_EXIT_DATA
:
10680 case EXEC_OMP_TARGET_PARALLEL
:
10681 case EXEC_OMP_TARGET_PARALLEL_DO
:
10682 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10683 case EXEC_OMP_TARGET_SIMD
:
10684 case EXEC_OMP_TARGET_TEAMS
:
10685 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10686 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10687 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10688 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10689 case EXEC_OMP_TARGET_UPDATE
:
10690 case EXEC_OMP_TASK
:
10691 case EXEC_OMP_TASKGROUP
:
10692 case EXEC_OMP_TASKLOOP
:
10693 case EXEC_OMP_TASKLOOP_SIMD
:
10694 case EXEC_OMP_TASKWAIT
:
10695 case EXEC_OMP_TASKYIELD
:
10696 case EXEC_OMP_TEAMS
:
10697 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10698 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10699 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10700 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10701 case EXEC_OMP_WORKSHARE
:
10705 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10708 gfc_resolve_code (b
->next
, ns
);
10713 /* Does everything to resolve an ordinary assignment. Returns true
10714 if this is an interface assignment. */
10716 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10723 symbol_attribute attr
;
10725 if (gfc_extend_assign (code
, ns
))
10729 if (code
->op
== EXEC_ASSIGN_CALL
)
10731 lhs
= code
->ext
.actual
->expr
;
10732 rhsptr
= &code
->ext
.actual
->next
->expr
;
10736 gfc_actual_arglist
* args
;
10737 gfc_typebound_proc
* tbp
;
10739 gcc_assert (code
->op
== EXEC_COMPCALL
);
10741 args
= code
->expr1
->value
.compcall
.actual
;
10743 rhsptr
= &args
->next
->expr
;
10745 tbp
= code
->expr1
->value
.compcall
.tbp
;
10746 gcc_assert (!tbp
->is_generic
);
10749 /* Make a temporary rhs when there is a default initializer
10750 and rhs is the same symbol as the lhs. */
10751 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10752 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10753 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10754 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10755 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10763 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10764 && rhs
->ts
.type
== BT_CHARACTER
10765 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10767 /* Use of -fdec-char-conversions allows assignment of character data
10768 to non-character variables. This not permited for nonconstant
10770 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10771 gfc_typename (lhs
), &rhs
->where
);
10775 /* Handle the case of a BOZ literal on the RHS. */
10776 if (rhs
->ts
.type
== BT_BOZ
)
10778 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10779 "statement value nor an actual argument of "
10780 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10784 switch (lhs
->ts
.type
)
10787 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10791 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10795 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10800 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10802 HOST_WIDE_INT llen
= 0, rlen
= 0;
10803 if (lhs
->ts
.u
.cl
!= NULL
10804 && lhs
->ts
.u
.cl
->length
!= NULL
10805 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10806 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10808 if (rhs
->expr_type
== EXPR_CONSTANT
)
10809 rlen
= rhs
->value
.character
.length
;
10811 else if (rhs
->ts
.u
.cl
!= NULL
10812 && rhs
->ts
.u
.cl
->length
!= NULL
10813 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10814 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10816 if (rlen
&& llen
&& rlen
> llen
)
10817 gfc_warning_now (OPT_Wcharacter_truncation
,
10818 "CHARACTER expression will be truncated "
10819 "in assignment (%ld/%ld) at %L",
10820 (long) llen
, (long) rlen
, &code
->loc
);
10823 /* Ensure that a vector index expression for the lvalue is evaluated
10824 to a temporary if the lvalue symbol is referenced in it. */
10827 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10828 if (ref
->type
== REF_ARRAY
)
10830 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10831 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10832 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10833 ref
->u
.ar
.start
[n
]))
10835 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10839 if (gfc_pure (NULL
))
10841 if (lhs
->ts
.type
== BT_DERIVED
10842 && lhs
->expr_type
== EXPR_VARIABLE
10843 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10844 && rhs
->expr_type
== EXPR_VARIABLE
10845 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10846 || gfc_is_coindexed (rhs
)))
10848 /* F2008, C1283. */
10849 if (gfc_is_coindexed (rhs
))
10850 gfc_error ("Coindexed expression at %L is assigned to "
10851 "a derived type variable with a POINTER "
10852 "component in a PURE procedure",
10855 /* F2008, C1283 (4). */
10856 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10857 "shall not be used as the expr at %L of an intrinsic "
10858 "assignment statement in which the variable is of a "
10859 "derived type if the derived type has a pointer "
10860 "component at any level of component selection.",
10865 /* Fortran 2008, C1283. */
10866 if (gfc_is_coindexed (lhs
))
10868 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10869 "procedure", &rhs
->where
);
10874 if (gfc_implicit_pure (NULL
))
10876 if (lhs
->expr_type
== EXPR_VARIABLE
10877 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10878 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10879 gfc_unset_implicit_pure (NULL
);
10881 if (lhs
->ts
.type
== BT_DERIVED
10882 && lhs
->expr_type
== EXPR_VARIABLE
10883 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10884 && rhs
->expr_type
== EXPR_VARIABLE
10885 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10886 || gfc_is_coindexed (rhs
)))
10887 gfc_unset_implicit_pure (NULL
);
10889 /* Fortran 2008, C1283. */
10890 if (gfc_is_coindexed (lhs
))
10891 gfc_unset_implicit_pure (NULL
);
10894 /* F2008, 7.2.1.2. */
10895 attr
= gfc_expr_attr (lhs
);
10896 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10898 if (attr
.codimension
)
10900 gfc_error ("Assignment to polymorphic coarray at %L is not "
10901 "permitted", &lhs
->where
);
10904 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10905 "polymorphic variable at %L", &lhs
->where
))
10907 if (!flag_realloc_lhs
)
10909 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10910 "requires %<-frealloc-lhs%>", &lhs
->where
);
10914 else if (lhs
->ts
.type
== BT_CLASS
)
10916 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10917 "assignment at %L - check that there is a matching specific "
10918 "subroutine for '=' operator", &lhs
->where
);
10922 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10924 /* F2008, Section 7.2.1.2. */
10925 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10927 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10928 "component in assignment at %L", &lhs
->where
);
10932 /* Assign the 'data' of a class object to a derived type. */
10933 if (lhs
->ts
.type
== BT_DERIVED
10934 && rhs
->ts
.type
== BT_CLASS
10935 && rhs
->expr_type
!= EXPR_ARRAY
)
10936 gfc_add_data_component (rhs
);
10938 /* Make sure there is a vtable and, in particular, a _copy for the
10940 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10941 gfc_find_vtab (&rhs
->ts
);
10943 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10945 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10946 && code
->expr2
->value
.function
.isym
10947 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10948 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10949 && !gfc_expr_attr (rhs
).allocatable
10950 && !gfc_has_vector_subscript (rhs
)));
10952 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10954 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10955 Additionally, insert this code when the RHS is a CAF as we then use the
10956 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10957 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10958 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10960 if (caf_convert_to_send
)
10962 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10963 && code
->expr2
->value
.function
.isym
10964 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10965 remove_caf_get_intrinsic (code
->expr2
);
10966 code
->op
= EXEC_CALL
;
10967 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10968 code
->resolved_sym
= code
->symtree
->n
.sym
;
10969 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10970 code
->resolved_sym
->attr
.intrinsic
= 1;
10971 code
->resolved_sym
->attr
.subroutine
= 1;
10972 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10973 gfc_commit_symbol (code
->resolved_sym
);
10974 code
->ext
.actual
= gfc_get_actual_arglist ();
10975 code
->ext
.actual
->expr
= lhs
;
10976 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10977 code
->ext
.actual
->next
->expr
= rhs
;
10978 code
->expr1
= NULL
;
10979 code
->expr2
= NULL
;
10986 /* Add a component reference onto an expression. */
10989 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10994 ref
= &((*ref
)->next
);
10995 *ref
= gfc_get_ref ();
10996 (*ref
)->type
= REF_COMPONENT
;
10997 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10998 (*ref
)->u
.c
.component
= c
;
11001 /* Add a full array ref, as necessary. */
11004 gfc_add_full_array_ref (e
, c
->as
);
11005 e
->rank
= c
->as
->rank
;
11010 /* Build an assignment. Keep the argument 'op' for future use, so that
11011 pointer assignments can be made. */
11014 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
11015 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11017 gfc_code
*this_code
;
11019 this_code
= gfc_get_code (op
);
11020 this_code
->next
= NULL
;
11021 this_code
->expr1
= gfc_copy_expr (expr1
);
11022 this_code
->expr2
= gfc_copy_expr (expr2
);
11023 this_code
->loc
= loc
;
11024 if (comp1
&& comp2
)
11026 add_comp_ref (this_code
->expr1
, comp1
);
11027 add_comp_ref (this_code
->expr2
, comp2
);
11034 /* Makes a temporary variable expression based on the characteristics of
11035 a given variable expression. */
11038 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11040 static int serial
= 0;
11041 char name
[GFC_MAX_SYMBOL_LEN
];
11043 gfc_array_spec
*as
;
11044 gfc_array_ref
*aref
;
11047 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11048 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11049 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11051 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11052 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11054 e
->value
.character
.length
);
11060 /* Obtain the arrayspec for the temporary. */
11061 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11062 && e
->expr_type
!= EXPR_FUNCTION
11063 && e
->expr_type
!= EXPR_OP
)
11065 aref
= gfc_find_array_ref (e
);
11066 if (e
->expr_type
== EXPR_VARIABLE
11067 && e
->symtree
->n
.sym
->as
== aref
->as
)
11071 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11072 if (ref
->type
== REF_COMPONENT
11073 && ref
->u
.c
.component
->as
== aref
->as
)
11081 /* Add the attributes and the arrayspec to the temporary. */
11082 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11083 tmp
->n
.sym
->attr
.function
= 0;
11084 tmp
->n
.sym
->attr
.result
= 0;
11085 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11086 tmp
->n
.sym
->attr
.dummy
= 0;
11087 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11091 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11094 if (as
->type
== AS_DEFERRED
)
11095 tmp
->n
.sym
->attr
.allocatable
= 1;
11097 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11098 || e
->expr_type
== EXPR_FUNCTION
11099 || e
->expr_type
== EXPR_OP
))
11101 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11102 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11103 tmp
->n
.sym
->as
->rank
= e
->rank
;
11104 tmp
->n
.sym
->attr
.allocatable
= 1;
11105 tmp
->n
.sym
->attr
.dimension
= 1;
11108 tmp
->n
.sym
->attr
.dimension
= 0;
11110 gfc_set_sym_referenced (tmp
->n
.sym
);
11111 gfc_commit_symbol (tmp
->n
.sym
);
11112 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11114 /* Should the lhs be a section, use its array ref for the
11115 temporary expression. */
11116 if (aref
&& aref
->type
!= AR_FULL
)
11118 gfc_free_ref_list (e
->ref
);
11119 e
->ref
= gfc_copy_ref (ref
);
11125 /* Add one line of code to the code chain, making sure that 'head' and
11126 'tail' are appropriately updated. */
11129 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11131 gcc_assert (this_code
);
11133 *head
= *tail
= *this_code
;
11135 *tail
= gfc_append_code (*tail
, *this_code
);
11140 /* Counts the potential number of part array references that would
11141 result from resolution of typebound defined assignments. */
11144 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11147 int c_depth
= 0, t_depth
;
11149 for (c
= derived
->components
; c
; c
= c
->next
)
11151 if ((!gfc_bt_struct (c
->ts
.type
)
11153 || c
->attr
.allocatable
11154 || c
->attr
.proc_pointer_comp
11155 || c
->attr
.class_pointer
11156 || c
->attr
.proc_pointer
)
11157 && !c
->attr
.defined_assign_comp
)
11160 if (c
->as
&& c_depth
== 0)
11163 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11164 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11169 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11171 return depth
+ c_depth
;
11175 /* Implement 7.2.1.3 of the F08 standard:
11176 "An intrinsic assignment where the variable is of derived type is
11177 performed as if each component of the variable were assigned from the
11178 corresponding component of expr using pointer assignment (7.2.2) for
11179 each pointer component, defined assignment for each nonpointer
11180 nonallocatable component of a type that has a type-bound defined
11181 assignment consistent with the component, intrinsic assignment for
11182 each other nonpointer nonallocatable component, ..."
11184 The pointer assignments are taken care of by the intrinsic
11185 assignment of the structure itself. This function recursively adds
11186 defined assignments where required. The recursion is accomplished
11187 by calling gfc_resolve_code.
11189 When the lhs in a defined assignment has intent INOUT, we need a
11190 temporary for the lhs. In pseudo-code:
11192 ! Only call function lhs once.
11193 if (lhs is not a constant or an variable)
11196 ! Do the intrinsic assignment
11198 ! Now do the defined assignments
11199 do over components with typebound defined assignment [%cmp]
11200 #if one component's assignment procedure is INOUT
11202 #if expr2 non-variable
11208 t1%cmp {defined=} expr2%cmp
11214 expr1%cmp {defined=} expr2%cmp
11218 /* The temporary assignments have to be put on top of the additional
11219 code to avoid the result being changed by the intrinsic assignment.
11221 static int component_assignment_level
= 0;
11222 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11225 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11227 gfc_component
*comp1
, *comp2
;
11228 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11230 int error_count
, depth
;
11232 gfc_get_errors (NULL
, &error_count
);
11234 /* Filter out continuing processing after an error. */
11236 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11237 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11240 /* TODO: Handle more than one part array reference in assignments. */
11241 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11242 (*code
)->expr1
->rank
? 1 : 0);
11245 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11246 "done because multiple part array references would "
11247 "occur in intermediate expressions.", &(*code
)->loc
);
11251 component_assignment_level
++;
11253 /* Create a temporary so that functions get called only once. */
11254 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11255 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11257 gfc_expr
*tmp_expr
;
11259 /* Assign the rhs to the temporary. */
11260 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11261 this_code
= build_assignment (EXEC_ASSIGN
,
11262 tmp_expr
, (*code
)->expr2
,
11263 NULL
, NULL
, (*code
)->loc
);
11264 /* Add the code and substitute the rhs expression. */
11265 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11266 gfc_free_expr ((*code
)->expr2
);
11267 (*code
)->expr2
= tmp_expr
;
11270 /* Do the intrinsic assignment. This is not needed if the lhs is one
11271 of the temporaries generated here, since the intrinsic assignment
11272 to the final result already does this. */
11273 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11275 this_code
= build_assignment (EXEC_ASSIGN
,
11276 (*code
)->expr1
, (*code
)->expr2
,
11277 NULL
, NULL
, (*code
)->loc
);
11278 add_code_to_chain (&this_code
, &head
, &tail
);
11281 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11282 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11285 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11287 bool inout
= false;
11289 /* The intrinsic assignment does the right thing for pointers
11290 of all kinds and allocatable components. */
11291 if (!gfc_bt_struct (comp1
->ts
.type
)
11292 || comp1
->attr
.pointer
11293 || comp1
->attr
.allocatable
11294 || comp1
->attr
.proc_pointer_comp
11295 || comp1
->attr
.class_pointer
11296 || comp1
->attr
.proc_pointer
)
11299 /* Make an assigment for this component. */
11300 this_code
= build_assignment (EXEC_ASSIGN
,
11301 (*code
)->expr1
, (*code
)->expr2
,
11302 comp1
, comp2
, (*code
)->loc
);
11304 /* Convert the assignment if there is a defined assignment for
11305 this type. Otherwise, using the call from gfc_resolve_code,
11306 recurse into its components. */
11307 gfc_resolve_code (this_code
, ns
);
11309 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11311 gfc_formal_arglist
*dummy_args
;
11313 /* Check that there is a typebound defined assignment. If not,
11314 then this must be a module defined assignment. We cannot
11315 use the defined_assign_comp attribute here because it must
11316 be this derived type that has the defined assignment and not
11318 if (!(comp1
->ts
.u
.derived
->f2k_derived
11319 && comp1
->ts
.u
.derived
->f2k_derived
11320 ->tb_op
[INTRINSIC_ASSIGN
]))
11322 gfc_free_statements (this_code
);
11327 /* If the first argument of the subroutine has intent INOUT
11328 a temporary must be generated and used instead. */
11329 rsym
= this_code
->resolved_sym
;
11330 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11332 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11334 gfc_code
*temp_code
;
11337 /* Build the temporary required for the assignment and put
11338 it at the head of the generated code. */
11341 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11342 temp_code
= build_assignment (EXEC_ASSIGN
,
11343 t1
, (*code
)->expr1
,
11344 NULL
, NULL
, (*code
)->loc
);
11346 /* For allocatable LHS, check whether it is allocated. Note
11347 that allocatable components with defined assignment are
11348 not yet support. See PR 57696. */
11349 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11353 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11354 block
= gfc_get_code (EXEC_IF
);
11355 block
->block
= gfc_get_code (EXEC_IF
);
11356 block
->block
->expr1
11357 = gfc_build_intrinsic_call (ns
,
11358 GFC_ISYM_ALLOCATED
, "allocated",
11359 (*code
)->loc
, 1, e
);
11360 block
->block
->next
= temp_code
;
11363 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11366 /* Replace the first actual arg with the component of the
11368 gfc_free_expr (this_code
->ext
.actual
->expr
);
11369 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11370 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11372 /* If the LHS variable is allocatable and wasn't allocated and
11373 the temporary is allocatable, pointer assign the address of
11374 the freshly allocated LHS to the temporary. */
11375 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11376 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11381 cond
= gfc_get_expr ();
11382 cond
->ts
.type
= BT_LOGICAL
;
11383 cond
->ts
.kind
= gfc_default_logical_kind
;
11384 cond
->expr_type
= EXPR_OP
;
11385 cond
->where
= (*code
)->loc
;
11386 cond
->value
.op
.op
= INTRINSIC_NOT
;
11387 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11388 GFC_ISYM_ALLOCATED
, "allocated",
11389 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11390 block
= gfc_get_code (EXEC_IF
);
11391 block
->block
= gfc_get_code (EXEC_IF
);
11392 block
->block
->expr1
= cond
;
11393 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11394 t1
, (*code
)->expr1
,
11395 NULL
, NULL
, (*code
)->loc
);
11396 add_code_to_chain (&block
, &head
, &tail
);
11400 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11402 /* Don't add intrinsic assignments since they are already
11403 effected by the intrinsic assignment of the structure. */
11404 gfc_free_statements (this_code
);
11409 add_code_to_chain (&this_code
, &head
, &tail
);
11413 /* Transfer the value to the final result. */
11414 this_code
= build_assignment (EXEC_ASSIGN
,
11415 (*code
)->expr1
, t1
,
11416 comp1
, comp2
, (*code
)->loc
);
11417 add_code_to_chain (&this_code
, &head
, &tail
);
11421 /* Put the temporary assignments at the top of the generated code. */
11422 if (tmp_head
&& component_assignment_level
== 1)
11424 gfc_append_code (tmp_head
, head
);
11426 tmp_head
= tmp_tail
= NULL
;
11429 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11430 // not accidentally deallocated. Hence, nullify t1.
11431 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11432 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11438 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11439 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11440 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11441 block
= gfc_get_code (EXEC_IF
);
11442 block
->block
= gfc_get_code (EXEC_IF
);
11443 block
->block
->expr1
= cond
;
11444 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11445 t1
, gfc_get_null_expr (&(*code
)->loc
),
11446 NULL
, NULL
, (*code
)->loc
);
11447 gfc_append_code (tail
, block
);
11451 /* Now attach the remaining code chain to the input code. Step on
11452 to the end of the new code since resolution is complete. */
11453 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11454 tail
->next
= (*code
)->next
;
11455 /* Overwrite 'code' because this would place the intrinsic assignment
11456 before the temporary for the lhs is created. */
11457 gfc_free_expr ((*code
)->expr1
);
11458 gfc_free_expr ((*code
)->expr2
);
11464 component_assignment_level
--;
11468 /* F2008: Pointer function assignments are of the form:
11469 ptr_fcn (args) = expr
11470 This function breaks these assignments into two statements:
11471 temporary_pointer => ptr_fcn(args)
11472 temporary_pointer = expr */
11475 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11477 gfc_expr
*tmp_ptr_expr
;
11478 gfc_code
*this_code
;
11479 gfc_component
*comp
;
11482 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11485 /* Even if standard does not support this feature, continue to build
11486 the two statements to avoid upsetting frontend_passes.c. */
11487 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11488 "%L", &(*code
)->loc
);
11490 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11493 s
= comp
->ts
.interface
;
11495 s
= (*code
)->expr1
->symtree
->n
.sym
;
11497 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11499 gfc_error ("The function result on the lhs of the assignment at "
11500 "%L must have the pointer attribute.",
11501 &(*code
)->expr1
->where
);
11502 (*code
)->op
= EXEC_NOP
;
11506 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11508 /* get_temp_from_expression is set up for ordinary assignments. To that
11509 end, where array bounds are not known, arrays are made allocatable.
11510 Change the temporary to a pointer here. */
11511 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11512 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11513 tmp_ptr_expr
->where
= (*code
)->loc
;
11515 this_code
= build_assignment (EXEC_ASSIGN
,
11516 tmp_ptr_expr
, (*code
)->expr2
,
11517 NULL
, NULL
, (*code
)->loc
);
11518 this_code
->next
= (*code
)->next
;
11519 (*code
)->next
= this_code
;
11520 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11521 (*code
)->expr2
= (*code
)->expr1
;
11522 (*code
)->expr1
= tmp_ptr_expr
;
11528 /* Deferred character length assignments from an operator expression
11529 require a temporary because the character length of the lhs can
11530 change in the course of the assignment. */
11533 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11535 gfc_expr
*tmp_expr
;
11536 gfc_code
*this_code
;
11538 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11539 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11540 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11543 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11546 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11549 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11550 tmp_expr
->where
= (*code
)->loc
;
11552 /* A new charlen is required to ensure that the variable string
11553 length is different to that of the original lhs. */
11554 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11555 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11556 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11557 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11559 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11561 this_code
= build_assignment (EXEC_ASSIGN
,
11563 gfc_copy_expr (tmp_expr
),
11564 NULL
, NULL
, (*code
)->loc
);
11566 (*code
)->expr1
= tmp_expr
;
11568 this_code
->next
= (*code
)->next
;
11569 (*code
)->next
= this_code
;
11575 /* Given a block of code, recursively resolve everything pointed to by this
11579 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11581 int omp_workshare_save
;
11582 int forall_save
, do_concurrent_save
;
11586 frame
.prev
= cs_base
;
11590 find_reachable_labels (code
);
11592 for (; code
; code
= code
->next
)
11594 frame
.current
= code
;
11595 forall_save
= forall_flag
;
11596 do_concurrent_save
= gfc_do_concurrent_flag
;
11598 if (code
->op
== EXEC_FORALL
)
11601 gfc_resolve_forall (code
, ns
, forall_save
);
11604 else if (code
->block
)
11606 omp_workshare_save
= -1;
11609 case EXEC_OACC_PARALLEL_LOOP
:
11610 case EXEC_OACC_PARALLEL
:
11611 case EXEC_OACC_KERNELS_LOOP
:
11612 case EXEC_OACC_KERNELS
:
11613 case EXEC_OACC_SERIAL_LOOP
:
11614 case EXEC_OACC_SERIAL
:
11615 case EXEC_OACC_DATA
:
11616 case EXEC_OACC_HOST_DATA
:
11617 case EXEC_OACC_LOOP
:
11618 gfc_resolve_oacc_blocks (code
, ns
);
11620 case EXEC_OMP_PARALLEL_WORKSHARE
:
11621 omp_workshare_save
= omp_workshare_flag
;
11622 omp_workshare_flag
= 1;
11623 gfc_resolve_omp_parallel_blocks (code
, ns
);
11625 case EXEC_OMP_PARALLEL
:
11626 case EXEC_OMP_PARALLEL_DO
:
11627 case EXEC_OMP_PARALLEL_DO_SIMD
:
11628 case EXEC_OMP_PARALLEL_SECTIONS
:
11629 case EXEC_OMP_TARGET_PARALLEL
:
11630 case EXEC_OMP_TARGET_PARALLEL_DO
:
11631 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11632 case EXEC_OMP_TARGET_TEAMS
:
11633 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11634 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11635 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11636 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11637 case EXEC_OMP_TASK
:
11638 case EXEC_OMP_TASKLOOP
:
11639 case EXEC_OMP_TASKLOOP_SIMD
:
11640 case EXEC_OMP_TEAMS
:
11641 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11642 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11643 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11644 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11645 omp_workshare_save
= omp_workshare_flag
;
11646 omp_workshare_flag
= 0;
11647 gfc_resolve_omp_parallel_blocks (code
, ns
);
11649 case EXEC_OMP_DISTRIBUTE
:
11650 case EXEC_OMP_DISTRIBUTE_SIMD
:
11652 case EXEC_OMP_DO_SIMD
:
11653 case EXEC_OMP_SIMD
:
11654 case EXEC_OMP_TARGET_SIMD
:
11655 gfc_resolve_omp_do_blocks (code
, ns
);
11657 case EXEC_SELECT_TYPE
:
11658 /* Blocks are handled in resolve_select_type because we have
11659 to transform the SELECT TYPE into ASSOCIATE first. */
11661 case EXEC_DO_CONCURRENT
:
11662 gfc_do_concurrent_flag
= 1;
11663 gfc_resolve_blocks (code
->block
, ns
);
11664 gfc_do_concurrent_flag
= 2;
11666 case EXEC_OMP_WORKSHARE
:
11667 omp_workshare_save
= omp_workshare_flag
;
11668 omp_workshare_flag
= 1;
11671 gfc_resolve_blocks (code
->block
, ns
);
11675 if (omp_workshare_save
!= -1)
11676 omp_workshare_flag
= omp_workshare_save
;
11680 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11681 t
= gfc_resolve_expr (code
->expr1
);
11682 forall_flag
= forall_save
;
11683 gfc_do_concurrent_flag
= do_concurrent_save
;
11685 if (!gfc_resolve_expr (code
->expr2
))
11688 if (code
->op
== EXEC_ALLOCATE
11689 && !gfc_resolve_expr (code
->expr3
))
11695 case EXEC_END_BLOCK
:
11696 case EXEC_END_NESTED_BLOCK
:
11700 case EXEC_ERROR_STOP
:
11702 case EXEC_CONTINUE
:
11704 case EXEC_ASSIGN_CALL
:
11707 case EXEC_CRITICAL
:
11708 resolve_critical (code
);
11711 case EXEC_SYNC_ALL
:
11712 case EXEC_SYNC_IMAGES
:
11713 case EXEC_SYNC_MEMORY
:
11714 resolve_sync (code
);
11719 case EXEC_EVENT_POST
:
11720 case EXEC_EVENT_WAIT
:
11721 resolve_lock_unlock_event (code
);
11724 case EXEC_FAIL_IMAGE
:
11725 case EXEC_FORM_TEAM
:
11726 case EXEC_CHANGE_TEAM
:
11727 case EXEC_END_TEAM
:
11728 case EXEC_SYNC_TEAM
:
11732 /* Keep track of which entry we are up to. */
11733 current_entry_id
= code
->ext
.entry
->id
;
11737 resolve_where (code
, NULL
);
11741 if (code
->expr1
!= NULL
)
11743 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11744 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11745 "INTEGER variable", &code
->expr1
->where
);
11746 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11747 gfc_error ("Variable %qs has not been assigned a target "
11748 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11749 &code
->expr1
->where
);
11752 resolve_branch (code
->label1
, code
);
11756 if (code
->expr1
!= NULL
11757 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11758 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11759 "INTEGER return specifier", &code
->expr1
->where
);
11762 case EXEC_INIT_ASSIGN
:
11763 case EXEC_END_PROCEDURE
:
11770 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11772 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11773 && code
->expr1
->value
.function
.isym
11774 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11775 remove_caf_get_intrinsic (code
->expr1
);
11777 /* If this is a pointer function in an lvalue variable context,
11778 the new code will have to be resolved afresh. This is also the
11779 case with an error, where the code is transformed into NOP to
11780 prevent ICEs downstream. */
11781 if (resolve_ptr_fcn_assign (&code
, ns
)
11782 || code
->op
== EXEC_NOP
)
11785 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11789 if (resolve_ordinary_assign (code
, ns
))
11791 if (code
->op
== EXEC_COMPCALL
)
11797 /* Check for dependencies in deferred character length array
11798 assignments and generate a temporary, if necessary. */
11799 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11802 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11803 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11804 && code
->expr1
->ts
.u
.derived
11805 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11806 generate_component_assignments (&code
, ns
);
11810 case EXEC_LABEL_ASSIGN
:
11811 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11812 gfc_error ("Label %d referenced at %L is never defined",
11813 code
->label1
->value
, &code
->label1
->where
);
11815 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11816 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11817 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11818 != gfc_default_integer_kind
11819 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11820 gfc_error ("ASSIGN statement at %L requires a scalar "
11821 "default INTEGER variable", &code
->expr1
->where
);
11824 case EXEC_POINTER_ASSIGN
:
11831 /* This is both a variable definition and pointer assignment
11832 context, so check both of them. For rank remapping, a final
11833 array ref may be present on the LHS and fool gfc_expr_attr
11834 used in gfc_check_vardef_context. Remove it. */
11835 e
= remove_last_array_ref (code
->expr1
);
11836 t
= gfc_check_vardef_context (e
, true, false, false,
11837 _("pointer assignment"));
11839 t
= gfc_check_vardef_context (e
, false, false, false,
11840 _("pointer assignment"));
11843 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11848 /* Assigning a class object always is a regular assign. */
11849 if (code
->expr2
->ts
.type
== BT_CLASS
11850 && code
->expr1
->ts
.type
== BT_CLASS
11851 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11852 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11853 && code
->expr2
->expr_type
== EXPR_VARIABLE
11854 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11856 code
->op
= EXEC_ASSIGN
;
11860 case EXEC_ARITHMETIC_IF
:
11862 gfc_expr
*e
= code
->expr1
;
11864 gfc_resolve_expr (e
);
11865 if (e
->expr_type
== EXPR_NULL
)
11866 gfc_error ("Invalid NULL at %L", &e
->where
);
11868 if (t
&& (e
->rank
> 0
11869 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11870 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11871 "REAL or INTEGER expression", &e
->where
);
11873 resolve_branch (code
->label1
, code
);
11874 resolve_branch (code
->label2
, code
);
11875 resolve_branch (code
->label3
, code
);
11880 if (t
&& code
->expr1
!= NULL
11881 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11882 || code
->expr1
->rank
!= 0))
11883 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11884 &code
->expr1
->where
);
11889 resolve_call (code
);
11892 case EXEC_COMPCALL
:
11894 resolve_typebound_subroutine (code
);
11897 case EXEC_CALL_PPC
:
11898 resolve_ppc_call (code
);
11902 /* Select is complicated. Also, a SELECT construct could be
11903 a transformed computed GOTO. */
11904 resolve_select (code
, false);
11907 case EXEC_SELECT_TYPE
:
11908 resolve_select_type (code
, ns
);
11911 case EXEC_SELECT_RANK
:
11912 resolve_select_rank (code
, ns
);
11916 resolve_block_construct (code
);
11920 if (code
->ext
.iterator
!= NULL
)
11922 gfc_iterator
*iter
= code
->ext
.iterator
;
11923 if (gfc_resolve_iterator (iter
, true, false))
11924 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11929 case EXEC_DO_WHILE
:
11930 if (code
->expr1
== NULL
)
11931 gfc_internal_error ("gfc_resolve_code(): No expression on "
11934 && (code
->expr1
->rank
!= 0
11935 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11936 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11937 "a scalar LOGICAL expression", &code
->expr1
->where
);
11940 case EXEC_ALLOCATE
:
11942 resolve_allocate_deallocate (code
, "ALLOCATE");
11946 case EXEC_DEALLOCATE
:
11948 resolve_allocate_deallocate (code
, "DEALLOCATE");
11953 if (!gfc_resolve_open (code
->ext
.open
))
11956 resolve_branch (code
->ext
.open
->err
, code
);
11960 if (!gfc_resolve_close (code
->ext
.close
))
11963 resolve_branch (code
->ext
.close
->err
, code
);
11966 case EXEC_BACKSPACE
:
11970 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11973 resolve_branch (code
->ext
.filepos
->err
, code
);
11977 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11980 resolve_branch (code
->ext
.inquire
->err
, code
);
11983 case EXEC_IOLENGTH
:
11984 gcc_assert (code
->ext
.inquire
!= NULL
);
11985 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11988 resolve_branch (code
->ext
.inquire
->err
, code
);
11992 if (!gfc_resolve_wait (code
->ext
.wait
))
11995 resolve_branch (code
->ext
.wait
->err
, code
);
11996 resolve_branch (code
->ext
.wait
->end
, code
);
11997 resolve_branch (code
->ext
.wait
->eor
, code
);
12002 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
12005 resolve_branch (code
->ext
.dt
->err
, code
);
12006 resolve_branch (code
->ext
.dt
->end
, code
);
12007 resolve_branch (code
->ext
.dt
->eor
, code
);
12010 case EXEC_TRANSFER
:
12011 resolve_transfer (code
);
12014 case EXEC_DO_CONCURRENT
:
12016 resolve_forall_iterators (code
->ext
.forall_iterator
);
12018 if (code
->expr1
!= NULL
12019 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12020 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12021 "expression", &code
->expr1
->where
);
12024 case EXEC_OACC_PARALLEL_LOOP
:
12025 case EXEC_OACC_PARALLEL
:
12026 case EXEC_OACC_KERNELS_LOOP
:
12027 case EXEC_OACC_KERNELS
:
12028 case EXEC_OACC_SERIAL_LOOP
:
12029 case EXEC_OACC_SERIAL
:
12030 case EXEC_OACC_DATA
:
12031 case EXEC_OACC_HOST_DATA
:
12032 case EXEC_OACC_LOOP
:
12033 case EXEC_OACC_UPDATE
:
12034 case EXEC_OACC_WAIT
:
12035 case EXEC_OACC_CACHE
:
12036 case EXEC_OACC_ENTER_DATA
:
12037 case EXEC_OACC_EXIT_DATA
:
12038 case EXEC_OACC_ATOMIC
:
12039 case EXEC_OACC_DECLARE
:
12040 gfc_resolve_oacc_directive (code
, ns
);
12043 case EXEC_OMP_ATOMIC
:
12044 case EXEC_OMP_BARRIER
:
12045 case EXEC_OMP_CANCEL
:
12046 case EXEC_OMP_CANCELLATION_POINT
:
12047 case EXEC_OMP_CRITICAL
:
12048 case EXEC_OMP_FLUSH
:
12049 case EXEC_OMP_DISTRIBUTE
:
12050 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12051 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12052 case EXEC_OMP_DISTRIBUTE_SIMD
:
12054 case EXEC_OMP_DO_SIMD
:
12055 case EXEC_OMP_MASTER
:
12056 case EXEC_OMP_ORDERED
:
12057 case EXEC_OMP_SECTIONS
:
12058 case EXEC_OMP_SIMD
:
12059 case EXEC_OMP_SINGLE
:
12060 case EXEC_OMP_TARGET
:
12061 case EXEC_OMP_TARGET_DATA
:
12062 case EXEC_OMP_TARGET_ENTER_DATA
:
12063 case EXEC_OMP_TARGET_EXIT_DATA
:
12064 case EXEC_OMP_TARGET_PARALLEL
:
12065 case EXEC_OMP_TARGET_PARALLEL_DO
:
12066 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12067 case EXEC_OMP_TARGET_SIMD
:
12068 case EXEC_OMP_TARGET_TEAMS
:
12069 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12070 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12071 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12072 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12073 case EXEC_OMP_TARGET_UPDATE
:
12074 case EXEC_OMP_TASK
:
12075 case EXEC_OMP_TASKGROUP
:
12076 case EXEC_OMP_TASKLOOP
:
12077 case EXEC_OMP_TASKLOOP_SIMD
:
12078 case EXEC_OMP_TASKWAIT
:
12079 case EXEC_OMP_TASKYIELD
:
12080 case EXEC_OMP_TEAMS
:
12081 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12082 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12083 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12084 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12085 case EXEC_OMP_WORKSHARE
:
12086 gfc_resolve_omp_directive (code
, ns
);
12089 case EXEC_OMP_PARALLEL
:
12090 case EXEC_OMP_PARALLEL_DO
:
12091 case EXEC_OMP_PARALLEL_DO_SIMD
:
12092 case EXEC_OMP_PARALLEL_SECTIONS
:
12093 case EXEC_OMP_PARALLEL_WORKSHARE
:
12094 omp_workshare_save
= omp_workshare_flag
;
12095 omp_workshare_flag
= 0;
12096 gfc_resolve_omp_directive (code
, ns
);
12097 omp_workshare_flag
= omp_workshare_save
;
12101 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12105 cs_base
= frame
.prev
;
12109 /* Resolve initial values and make sure they are compatible with
12113 resolve_values (gfc_symbol
*sym
)
12117 if (sym
->value
== NULL
)
12120 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12121 t
= resolve_structure_cons (sym
->value
, 1);
12123 t
= gfc_resolve_expr (sym
->value
);
12128 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12132 /* Verify any BIND(C) derived types in the namespace so we can report errors
12133 for them once, rather than for each variable declared of that type. */
12136 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12138 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12139 && derived_sym
->attr
.is_bind_c
== 1)
12140 verify_bind_c_derived_type (derived_sym
);
12146 /* Check the interfaces of DTIO procedures associated with derived
12147 type 'sym'. These procedures can either have typebound bindings or
12148 can appear in DTIO generic interfaces. */
12151 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12153 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12156 gfc_check_dtio_interfaces (sym
);
12161 /* Verify that any binding labels used in a given namespace do not collide
12162 with the names or binding labels of any global symbols. Multiple INTERFACE
12163 for the same procedure are permitted. */
12166 gfc_verify_binding_labels (gfc_symbol
*sym
)
12169 const char *module
;
12171 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12172 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12175 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12178 module
= sym
->module
;
12179 else if (sym
->ns
&& sym
->ns
->proc_name
12180 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12181 module
= sym
->ns
->proc_name
->name
;
12182 else if (sym
->ns
&& sym
->ns
->parent
12183 && sym
->ns
&& sym
->ns
->parent
->proc_name
12184 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12185 module
= sym
->ns
->parent
->proc_name
->name
;
12191 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12194 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12195 gsym
->where
= sym
->declared_at
;
12196 gsym
->sym_name
= sym
->name
;
12197 gsym
->binding_label
= sym
->binding_label
;
12198 gsym
->ns
= sym
->ns
;
12199 gsym
->mod_name
= module
;
12200 if (sym
->attr
.function
)
12201 gsym
->type
= GSYM_FUNCTION
;
12202 else if (sym
->attr
.subroutine
)
12203 gsym
->type
= GSYM_SUBROUTINE
;
12204 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12205 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12209 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12211 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12212 "identifier as entity at %L", sym
->name
,
12213 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12214 /* Clear the binding label to prevent checking multiple times. */
12215 sym
->binding_label
= NULL
;
12219 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12220 && (strcmp (module
, gsym
->mod_name
) != 0
12221 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12223 /* This can only happen if the variable is defined in a module - if it
12224 isn't the same module, reject it. */
12225 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12226 "uses the same global identifier as entity at %L from module %qs",
12227 sym
->name
, module
, sym
->binding_label
,
12228 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12229 sym
->binding_label
= NULL
;
12233 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12234 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12235 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12236 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12237 && (module
!= gsym
->mod_name
12238 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12239 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12241 /* Print an error if the procedure is defined multiple times; we have to
12242 exclude references to the same procedure via module association or
12243 multiple checks for the same procedure. */
12244 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12245 "global identifier as entity at %L", sym
->name
,
12246 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12247 sym
->binding_label
= NULL
;
12252 /* Resolve an index expression. */
12255 resolve_index_expr (gfc_expr
*e
)
12257 if (!gfc_resolve_expr (e
))
12260 if (!gfc_simplify_expr (e
, 0))
12263 if (!gfc_specification_expr (e
))
12270 /* Resolve a charlen structure. */
12273 resolve_charlen (gfc_charlen
*cl
)
12276 bool saved_specification_expr
;
12282 saved_specification_expr
= specification_expr
;
12283 specification_expr
= true;
12285 if (cl
->length_from_typespec
)
12287 if (!gfc_resolve_expr (cl
->length
))
12289 specification_expr
= saved_specification_expr
;
12293 if (!gfc_simplify_expr (cl
->length
, 0))
12295 specification_expr
= saved_specification_expr
;
12299 /* cl->length has been resolved. It should have an integer type. */
12300 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12302 gfc_error ("Scalar INTEGER expression expected at %L",
12303 &cl
->length
->where
);
12309 if (!resolve_index_expr (cl
->length
))
12311 specification_expr
= saved_specification_expr
;
12316 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12317 a negative value, the length of character entities declared is zero. */
12318 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12319 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12320 gfc_replace_expr (cl
->length
,
12321 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12323 /* Check that the character length is not too large. */
12324 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12325 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12326 && cl
->length
->ts
.type
== BT_INTEGER
12327 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12329 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12330 specification_expr
= saved_specification_expr
;
12334 specification_expr
= saved_specification_expr
;
12339 /* Test for non-constant shape arrays. */
12342 is_non_constant_shape_array (gfc_symbol
*sym
)
12348 not_constant
= false;
12349 if (sym
->as
!= NULL
)
12351 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12352 has not been simplified; parameter array references. Do the
12353 simplification now. */
12354 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12356 if (i
== GFC_MAX_DIMENSIONS
)
12359 e
= sym
->as
->lower
[i
];
12360 if (e
&& (!resolve_index_expr(e
)
12361 || !gfc_is_constant_expr (e
)))
12362 not_constant
= true;
12363 e
= sym
->as
->upper
[i
];
12364 if (e
&& (!resolve_index_expr(e
)
12365 || !gfc_is_constant_expr (e
)))
12366 not_constant
= true;
12369 return not_constant
;
12372 /* Given a symbol and an initialization expression, add code to initialize
12373 the symbol to the function entry. */
12375 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12379 gfc_namespace
*ns
= sym
->ns
;
12381 /* Search for the function namespace if this is a contained
12382 function without an explicit result. */
12383 if (sym
->attr
.function
&& sym
== sym
->result
12384 && sym
->name
!= sym
->ns
->proc_name
->name
)
12386 ns
= ns
->contained
;
12387 for (;ns
; ns
= ns
->sibling
)
12388 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12394 gfc_free_expr (init
);
12398 /* Build an l-value expression for the result. */
12399 lval
= gfc_lval_expr_from_sym (sym
);
12401 /* Add the code at scope entry. */
12402 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12403 init_st
->next
= ns
->code
;
12404 ns
->code
= init_st
;
12406 /* Assign the default initializer to the l-value. */
12407 init_st
->loc
= sym
->declared_at
;
12408 init_st
->expr1
= lval
;
12409 init_st
->expr2
= init
;
12413 /* Whether or not we can generate a default initializer for a symbol. */
12416 can_generate_init (gfc_symbol
*sym
)
12418 symbol_attribute
*a
;
12423 /* These symbols should never have a default initialization. */
12428 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12429 && (CLASS_DATA (sym
)->attr
.class_pointer
12430 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12431 || a
->in_equivalence
12438 || (!a
->referenced
&& !a
->result
)
12439 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12440 || (a
->function
&& sym
!= sym
->result
)
12445 /* Assign the default initializer to a derived type variable or result. */
12448 apply_default_init (gfc_symbol
*sym
)
12450 gfc_expr
*init
= NULL
;
12452 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12455 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12456 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12458 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12461 build_init_assign (sym
, init
);
12462 sym
->attr
.referenced
= 1;
12466 /* Build an initializer for a local. Returns null if the symbol should not have
12467 a default initialization. */
12470 build_default_init_expr (gfc_symbol
*sym
)
12472 /* These symbols should never have a default initialization. */
12473 if (sym
->attr
.allocatable
12474 || sym
->attr
.external
12476 || sym
->attr
.pointer
12477 || sym
->attr
.in_equivalence
12478 || sym
->attr
.in_common
12481 || sym
->attr
.cray_pointee
12482 || sym
->attr
.cray_pointer
12486 /* Get the appropriate init expression. */
12487 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12490 /* Add an initialization expression to a local variable. */
12492 apply_default_init_local (gfc_symbol
*sym
)
12494 gfc_expr
*init
= NULL
;
12496 /* The symbol should be a variable or a function return value. */
12497 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12498 || (sym
->attr
.function
&& sym
->result
!= sym
))
12501 /* Try to build the initializer expression. If we can't initialize
12502 this symbol, then init will be NULL. */
12503 init
= build_default_init_expr (sym
);
12507 /* For saved variables, we don't want to add an initializer at function
12508 entry, so we just add a static initializer. Note that automatic variables
12509 are stack allocated even with -fno-automatic; we have also to exclude
12510 result variable, which are also nonstatic. */
12511 if (!sym
->attr
.automatic
12512 && (sym
->attr
.save
|| sym
->ns
->save_all
12513 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12514 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12515 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12517 /* Don't clobber an existing initializer! */
12518 gcc_assert (sym
->value
== NULL
);
12523 build_init_assign (sym
, init
);
12527 /* Resolution of common features of flavors variable and procedure. */
12530 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12532 gfc_array_spec
*as
;
12534 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12535 as
= CLASS_DATA (sym
)->as
;
12539 /* Constraints on deferred shape variable. */
12540 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12542 bool pointer
, allocatable
, dimension
;
12544 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12546 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12547 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12548 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12552 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12553 allocatable
= sym
->attr
.allocatable
;
12554 dimension
= sym
->attr
.dimension
;
12559 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12561 gfc_error ("Allocatable array %qs at %L must have a deferred "
12562 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12565 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12566 "%qs at %L may not be ALLOCATABLE",
12567 sym
->name
, &sym
->declared_at
))
12571 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12573 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12574 "assumed rank", sym
->name
, &sym
->declared_at
);
12580 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12581 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12583 gfc_error ("Array %qs at %L cannot have a deferred shape",
12584 sym
->name
, &sym
->declared_at
);
12589 /* Constraints on polymorphic variables. */
12590 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12593 if (sym
->attr
.class_ok
12594 && !sym
->attr
.select_type_temporary
12595 && !UNLIMITED_POLY (sym
)
12596 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12598 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12599 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12600 &sym
->declared_at
);
12605 /* Assume that use associated symbols were checked in the module ns.
12606 Class-variables that are associate-names are also something special
12607 and excepted from the test. */
12608 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12610 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12611 "or pointer", sym
->name
, &sym
->declared_at
);
12620 /* Additional checks for symbols with flavor variable and derived
12621 type. To be called from resolve_fl_variable. */
12624 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12626 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12628 /* Check to see if a derived type is blocked from being host
12629 associated by the presence of another class I symbol in the same
12630 namespace. 14.6.1.3 of the standard and the discussion on
12631 comp.lang.fortran. */
12632 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12633 && !sym
->ts
.u
.derived
->attr
.use_assoc
12634 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12637 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12638 if (s
&& s
->attr
.generic
)
12639 s
= gfc_find_dt_in_generic (s
);
12640 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12642 gfc_error ("The type %qs cannot be host associated at %L "
12643 "because it is blocked by an incompatible object "
12644 "of the same name declared at %L",
12645 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12651 /* 4th constraint in section 11.3: "If an object of a type for which
12652 component-initialization is specified (R429) appears in the
12653 specification-part of a module and does not have the ALLOCATABLE
12654 or POINTER attribute, the object shall have the SAVE attribute."
12656 The check for initializers is performed with
12657 gfc_has_default_initializer because gfc_default_initializer generates
12658 a hidden default for allocatable components. */
12659 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12660 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12661 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12662 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12663 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12664 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12665 "%qs at %L, needed due to the default "
12666 "initialization", sym
->name
, &sym
->declared_at
))
12669 /* Assign default initializer. */
12670 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12671 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12672 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12678 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12679 except in the declaration of an entity or component that has the POINTER
12680 or ALLOCATABLE attribute. */
12683 deferred_requirements (gfc_symbol
*sym
)
12685 if (sym
->ts
.deferred
12686 && !(sym
->attr
.pointer
12687 || sym
->attr
.allocatable
12688 || sym
->attr
.associate_var
12689 || sym
->attr
.omp_udr_artificial_var
))
12691 /* If a function has a result variable, only check the variable. */
12692 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12695 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12696 "requires either the POINTER or ALLOCATABLE attribute",
12697 sym
->name
, &sym
->declared_at
);
12704 /* Resolve symbols with flavor variable. */
12707 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12709 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12712 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12715 /* Set this flag to check that variables are parameters of all entries.
12716 This check is effected by the call to gfc_resolve_expr through
12717 is_non_constant_shape_array. */
12718 bool saved_specification_expr
= specification_expr
;
12719 specification_expr
= true;
12721 if (sym
->ns
->proc_name
12722 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12723 || sym
->ns
->proc_name
->attr
.is_main_program
)
12724 && !sym
->attr
.use_assoc
12725 && !sym
->attr
.allocatable
12726 && !sym
->attr
.pointer
12727 && is_non_constant_shape_array (sym
))
12729 /* F08:C541. The shape of an array defined in a main program or module
12730 * needs to be constant. */
12731 gfc_error ("The module or main program array %qs at %L must "
12732 "have constant shape", sym
->name
, &sym
->declared_at
);
12733 specification_expr
= saved_specification_expr
;
12737 /* Constraints on deferred type parameter. */
12738 if (!deferred_requirements (sym
))
12741 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12743 /* Make sure that character string variables with assumed length are
12744 dummy arguments. */
12745 gfc_expr
*e
= NULL
;
12748 e
= sym
->ts
.u
.cl
->length
;
12752 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12753 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12754 && !sym
->attr
.omp_udr_artificial_var
)
12756 gfc_error ("Entity with assumed character length at %L must be a "
12757 "dummy argument or a PARAMETER", &sym
->declared_at
);
12758 specification_expr
= saved_specification_expr
;
12762 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12764 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12765 specification_expr
= saved_specification_expr
;
12769 if (!gfc_is_constant_expr (e
)
12770 && !(e
->expr_type
== EXPR_VARIABLE
12771 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12773 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12774 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12775 || sym
->ns
->proc_name
->attr
.is_main_program
))
12777 gfc_error ("%qs at %L must have constant character length "
12778 "in this context", sym
->name
, &sym
->declared_at
);
12779 specification_expr
= saved_specification_expr
;
12782 if (sym
->attr
.in_common
)
12784 gfc_error ("COMMON variable %qs at %L must have constant "
12785 "character length", sym
->name
, &sym
->declared_at
);
12786 specification_expr
= saved_specification_expr
;
12792 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12793 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12795 /* Determine if the symbol may not have an initializer. */
12796 int no_init_flag
= 0, automatic_flag
= 0;
12797 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12798 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12800 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12801 && is_non_constant_shape_array (sym
))
12803 no_init_flag
= automatic_flag
= 1;
12805 /* Also, they must not have the SAVE attribute.
12806 SAVE_IMPLICIT is checked below. */
12807 if (sym
->as
&& sym
->attr
.codimension
)
12809 int corank
= sym
->as
->corank
;
12810 sym
->as
->corank
= 0;
12811 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12812 sym
->as
->corank
= corank
;
12814 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12816 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12817 specification_expr
= saved_specification_expr
;
12822 /* Ensure that any initializer is simplified. */
12824 gfc_simplify_expr (sym
->value
, 1);
12826 /* Reject illegal initializers. */
12827 if (!sym
->mark
&& sym
->value
)
12829 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12830 && CLASS_DATA (sym
)->attr
.allocatable
))
12831 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12832 sym
->name
, &sym
->declared_at
);
12833 else if (sym
->attr
.external
)
12834 gfc_error ("External %qs at %L cannot have an initializer",
12835 sym
->name
, &sym
->declared_at
);
12836 else if (sym
->attr
.dummy
12837 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12838 gfc_error ("Dummy %qs at %L cannot have an initializer",
12839 sym
->name
, &sym
->declared_at
);
12840 else if (sym
->attr
.intrinsic
)
12841 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12842 sym
->name
, &sym
->declared_at
);
12843 else if (sym
->attr
.result
)
12844 gfc_error ("Function result %qs at %L cannot have an initializer",
12845 sym
->name
, &sym
->declared_at
);
12846 else if (automatic_flag
)
12847 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12848 sym
->name
, &sym
->declared_at
);
12850 goto no_init_error
;
12851 specification_expr
= saved_specification_expr
;
12856 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12858 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12859 specification_expr
= saved_specification_expr
;
12863 specification_expr
= saved_specification_expr
;
12868 /* Compare the dummy characteristics of a module procedure interface
12869 declaration with the corresponding declaration in a submodule. */
12870 static gfc_formal_arglist
*new_formal
;
12871 static char errmsg
[200];
12874 compare_fsyms (gfc_symbol
*sym
)
12878 if (sym
== NULL
|| new_formal
== NULL
)
12881 fsym
= new_formal
->sym
;
12886 if (strcmp (sym
->name
, fsym
->name
) == 0)
12888 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12889 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12894 /* Resolve a procedure. */
12897 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12899 gfc_formal_arglist
*arg
;
12901 if (sym
->attr
.function
12902 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12905 /* Constraints on deferred type parameter. */
12906 if (!deferred_requirements (sym
))
12909 if (sym
->ts
.type
== BT_CHARACTER
)
12911 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12913 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12914 && !resolve_charlen (cl
))
12917 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12918 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12920 gfc_error ("Character-valued statement function %qs at %L must "
12921 "have constant length", sym
->name
, &sym
->declared_at
);
12926 /* Ensure that derived type for are not of a private type. Internal
12927 module procedures are excluded by 2.2.3.3 - i.e., they are not
12928 externally accessible and can access all the objects accessible in
12930 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12931 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12932 && gfc_check_symbol_access (sym
))
12934 gfc_interface
*iface
;
12936 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12939 && arg
->sym
->ts
.type
== BT_DERIVED
12940 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12941 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12942 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12943 "and cannot be a dummy argument"
12944 " of %qs, which is PUBLIC at %L",
12945 arg
->sym
->name
, sym
->name
,
12946 &sym
->declared_at
))
12948 /* Stop this message from recurring. */
12949 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12954 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12955 PRIVATE to the containing module. */
12956 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12958 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12961 && arg
->sym
->ts
.type
== BT_DERIVED
12962 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12963 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12964 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12965 "PUBLIC interface %qs at %L "
12966 "takes dummy arguments of %qs which "
12967 "is PRIVATE", iface
->sym
->name
,
12968 sym
->name
, &iface
->sym
->declared_at
,
12969 gfc_typename(&arg
->sym
->ts
)))
12971 /* Stop this message from recurring. */
12972 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12979 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12980 && !sym
->attr
.proc_pointer
)
12982 gfc_error ("Function %qs at %L cannot have an initializer",
12983 sym
->name
, &sym
->declared_at
);
12985 /* Make sure no second error is issued for this. */
12986 sym
->value
->error
= 1;
12990 /* An external symbol may not have an initializer because it is taken to be
12991 a procedure. Exception: Procedure Pointers. */
12992 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12994 gfc_error ("External object %qs at %L may not have an initializer",
12995 sym
->name
, &sym
->declared_at
);
12999 /* An elemental function is required to return a scalar 12.7.1 */
13000 if (sym
->attr
.elemental
&& sym
->attr
.function
13001 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
13003 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
13004 "result", sym
->name
, &sym
->declared_at
);
13005 /* Reset so that the error only occurs once. */
13006 sym
->attr
.elemental
= 0;
13010 if (sym
->attr
.proc
== PROC_ST_FUNCTION
13011 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
13013 gfc_error ("Statement function %qs at %L may not have pointer or "
13014 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13018 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13019 char-len-param shall not be array-valued, pointer-valued, recursive
13020 or pure. ....snip... A character value of * may only be used in the
13021 following ways: (i) Dummy arg of procedure - dummy associates with
13022 actual length; (ii) To declare a named constant; or (iii) External
13023 function - but length must be declared in calling scoping unit. */
13024 if (sym
->attr
.function
13025 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13026 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13028 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13029 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13031 if (sym
->as
&& sym
->as
->rank
)
13032 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13033 "array-valued", sym
->name
, &sym
->declared_at
);
13035 if (sym
->attr
.pointer
)
13036 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13037 "pointer-valued", sym
->name
, &sym
->declared_at
);
13039 if (sym
->attr
.pure
)
13040 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13041 "pure", sym
->name
, &sym
->declared_at
);
13043 if (sym
->attr
.recursive
)
13044 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13045 "recursive", sym
->name
, &sym
->declared_at
);
13050 /* Appendix B.2 of the standard. Contained functions give an
13051 error anyway. Deferred character length is an F2003 feature.
13052 Don't warn on intrinsic conversion functions, which start
13053 with two underscores. */
13054 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13055 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13056 gfc_notify_std (GFC_STD_F95_OBS
,
13057 "CHARACTER(*) function %qs at %L",
13058 sym
->name
, &sym
->declared_at
);
13061 /* F2008, C1218. */
13062 if (sym
->attr
.elemental
)
13064 if (sym
->attr
.proc_pointer
)
13066 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13067 sym
->name
, &sym
->declared_at
);
13070 if (sym
->attr
.dummy
)
13072 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13073 sym
->name
, &sym
->declared_at
);
13078 /* F2018, C15100: "The result of an elemental function shall be scalar,
13079 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13080 pointer is tested and caught elsewhere. */
13081 if (sym
->attr
.elemental
&& sym
->result
13082 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13084 gfc_error ("Function result variable %qs at %L of elemental "
13085 "function %qs shall not have an ALLOCATABLE or POINTER "
13086 "attribute", sym
->result
->name
,
13087 &sym
->result
->declared_at
, sym
->name
);
13091 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13093 gfc_formal_arglist
*curr_arg
;
13094 int has_non_interop_arg
= 0;
13096 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13097 sym
->common_block
))
13099 /* Clear these to prevent looking at them again if there was an
13101 sym
->attr
.is_bind_c
= 0;
13102 sym
->attr
.is_c_interop
= 0;
13103 sym
->ts
.is_c_interop
= 0;
13107 /* So far, no errors have been found. */
13108 sym
->attr
.is_c_interop
= 1;
13109 sym
->ts
.is_c_interop
= 1;
13112 curr_arg
= gfc_sym_get_dummy_args (sym
);
13113 while (curr_arg
!= NULL
)
13115 /* Skip implicitly typed dummy args here. */
13116 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13117 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13118 /* If something is found to fail, record the fact so we
13119 can mark the symbol for the procedure as not being
13120 BIND(C) to try and prevent multiple errors being
13122 has_non_interop_arg
= 1;
13124 curr_arg
= curr_arg
->next
;
13127 /* See if any of the arguments were not interoperable and if so, clear
13128 the procedure symbol to prevent duplicate error messages. */
13129 if (has_non_interop_arg
!= 0)
13131 sym
->attr
.is_c_interop
= 0;
13132 sym
->ts
.is_c_interop
= 0;
13133 sym
->attr
.is_bind_c
= 0;
13137 if (!sym
->attr
.proc_pointer
)
13139 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13141 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13142 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13145 if (sym
->attr
.intent
)
13147 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13148 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13151 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13153 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13154 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13157 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13158 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13159 || sym
->attr
.contained
))
13161 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13162 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13165 if (strcmp ("ppr@", sym
->name
) == 0)
13167 gfc_error ("Procedure pointer result %qs at %L "
13168 "is missing the pointer attribute",
13169 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13174 /* Assume that a procedure whose body is not known has references
13175 to external arrays. */
13176 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13177 sym
->attr
.array_outer_dependency
= 1;
13179 /* Compare the characteristics of a module procedure with the
13180 interface declaration. Ideally this would be done with
13181 gfc_compare_interfaces but, at present, the formal interface
13182 cannot be copied to the ts.interface. */
13183 if (sym
->attr
.module_procedure
13184 && sym
->attr
.if_source
== IFSRC_DECL
)
13187 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13189 char *submodule_name
;
13190 strcpy (name
, sym
->ns
->proc_name
->name
);
13191 module_name
= strtok (name
, ".");
13192 submodule_name
= strtok (NULL
, ".");
13194 iface
= sym
->tlink
;
13197 /* Make sure that the result uses the correct charlen for deferred
13199 if (iface
&& sym
->result
13200 && iface
->ts
.type
== BT_CHARACTER
13201 && iface
->ts
.deferred
)
13202 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13207 /* Check the procedure characteristics. */
13208 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13210 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13211 "PROCEDURE at %L and its interface in %s",
13212 &sym
->declared_at
, module_name
);
13216 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13218 gfc_error ("Mismatch in PURE attribute between MODULE "
13219 "PROCEDURE at %L and its interface in %s",
13220 &sym
->declared_at
, module_name
);
13224 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13226 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13227 "PROCEDURE at %L and its interface in %s",
13228 &sym
->declared_at
, module_name
);
13232 /* Check the result characteristics. */
13233 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13235 gfc_error ("%s between the MODULE PROCEDURE declaration "
13236 "in MODULE %qs and the declaration at %L in "
13238 errmsg
, module_name
, &sym
->declared_at
,
13239 submodule_name
? submodule_name
: module_name
);
13244 /* Check the characteristics of the formal arguments. */
13245 if (sym
->formal
&& sym
->formal_ns
)
13247 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13250 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13258 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13259 been defined and we now know their defined arguments, check that they fulfill
13260 the requirements of the standard for procedures used as finalizers. */
13263 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13265 gfc_finalizer
* list
;
13266 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13267 bool result
= true;
13268 bool seen_scalar
= false;
13271 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13274 gfc_resolve_finalizers (parent
, finalizable
);
13276 /* Ensure that derived-type components have a their finalizers resolved. */
13277 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13278 for (c
= derived
->components
; c
; c
= c
->next
)
13279 if (c
->ts
.type
== BT_DERIVED
13280 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13282 bool has_final2
= false;
13283 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13284 return false; /* Error. */
13285 has_final
= has_final
|| has_final2
;
13287 /* Return early if not finalizable. */
13291 *finalizable
= false;
13295 /* Walk over the list of finalizer-procedures, check them, and if any one
13296 does not fit in with the standard's definition, print an error and remove
13297 it from the list. */
13298 prev_link
= &derived
->f2k_derived
->finalizers
;
13299 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13301 gfc_formal_arglist
*dummy_args
;
13306 /* Skip this finalizer if we already resolved it. */
13307 if (list
->proc_tree
)
13309 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13310 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13311 seen_scalar
= true;
13312 prev_link
= &(list
->next
);
13316 /* Check this exists and is a SUBROUTINE. */
13317 if (!list
->proc_sym
->attr
.subroutine
)
13319 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13320 list
->proc_sym
->name
, &list
->where
);
13324 /* We should have exactly one argument. */
13325 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13326 if (!dummy_args
|| dummy_args
->next
)
13328 gfc_error ("FINAL procedure at %L must have exactly one argument",
13332 arg
= dummy_args
->sym
;
13334 /* This argument must be of our type. */
13335 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13337 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13338 &arg
->declared_at
, derived
->name
);
13342 /* It must neither be a pointer nor allocatable nor optional. */
13343 if (arg
->attr
.pointer
)
13345 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13346 &arg
->declared_at
);
13349 if (arg
->attr
.allocatable
)
13351 gfc_error ("Argument of FINAL procedure at %L must not be"
13352 " ALLOCATABLE", &arg
->declared_at
);
13355 if (arg
->attr
.optional
)
13357 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13358 &arg
->declared_at
);
13362 /* It must not be INTENT(OUT). */
13363 if (arg
->attr
.intent
== INTENT_OUT
)
13365 gfc_error ("Argument of FINAL procedure at %L must not be"
13366 " INTENT(OUT)", &arg
->declared_at
);
13370 /* Warn if the procedure is non-scalar and not assumed shape. */
13371 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13372 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13373 gfc_warning (OPT_Wsurprising
,
13374 "Non-scalar FINAL procedure at %L should have assumed"
13375 " shape argument", &arg
->declared_at
);
13377 /* Check that it does not match in kind and rank with a FINAL procedure
13378 defined earlier. To really loop over the *earlier* declarations,
13379 we need to walk the tail of the list as new ones were pushed at the
13381 /* TODO: Handle kind parameters once they are implemented. */
13382 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13383 for (i
= list
->next
; i
; i
= i
->next
)
13385 gfc_formal_arglist
*dummy_args
;
13387 /* Argument list might be empty; that is an error signalled earlier,
13388 but we nevertheless continued resolving. */
13389 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13392 gfc_symbol
* i_arg
= dummy_args
->sym
;
13393 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13394 if (i_rank
== my_rank
)
13396 gfc_error ("FINAL procedure %qs declared at %L has the same"
13397 " rank (%d) as %qs",
13398 list
->proc_sym
->name
, &list
->where
, my_rank
,
13399 i
->proc_sym
->name
);
13405 /* Is this the/a scalar finalizer procedure? */
13407 seen_scalar
= true;
13409 /* Find the symtree for this procedure. */
13410 gcc_assert (!list
->proc_tree
);
13411 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13413 prev_link
= &list
->next
;
13416 /* Remove wrong nodes immediately from the list so we don't risk any
13417 troubles in the future when they might fail later expectations. */
13420 *prev_link
= list
->next
;
13421 gfc_free_finalizer (i
);
13425 if (result
== false)
13428 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13429 were nodes in the list, must have been for arrays. It is surely a good
13430 idea to have a scalar version there if there's something to finalize. */
13431 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13432 gfc_warning (OPT_Wsurprising
,
13433 "Only array FINAL procedures declared for derived type %qs"
13434 " defined at %L, suggest also scalar one",
13435 derived
->name
, &derived
->declared_at
);
13437 vtab
= gfc_find_derived_vtab (derived
);
13438 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13439 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13442 *finalizable
= true;
13448 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13451 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13452 const char* generic_name
, locus where
)
13454 gfc_symbol
*sym1
, *sym2
;
13455 const char *pass1
, *pass2
;
13456 gfc_formal_arglist
*dummy_args
;
13458 gcc_assert (t1
->specific
&& t2
->specific
);
13459 gcc_assert (!t1
->specific
->is_generic
);
13460 gcc_assert (!t2
->specific
->is_generic
);
13461 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13463 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13464 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13469 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13470 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13471 || sym1
->attr
.function
!= sym2
->attr
.function
)
13473 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13474 " GENERIC %qs at %L",
13475 sym1
->name
, sym2
->name
, generic_name
, &where
);
13479 /* Determine PASS arguments. */
13480 if (t1
->specific
->nopass
)
13482 else if (t1
->specific
->pass_arg
)
13483 pass1
= t1
->specific
->pass_arg
;
13486 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13488 pass1
= dummy_args
->sym
->name
;
13492 if (t2
->specific
->nopass
)
13494 else if (t2
->specific
->pass_arg
)
13495 pass2
= t2
->specific
->pass_arg
;
13498 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13500 pass2
= dummy_args
->sym
->name
;
13505 /* Compare the interfaces. */
13506 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13507 NULL
, 0, pass1
, pass2
))
13509 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13510 sym1
->name
, sym2
->name
, generic_name
, &where
);
13518 /* Worker function for resolving a generic procedure binding; this is used to
13519 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13521 The difference between those cases is finding possible inherited bindings
13522 that are overridden, as one has to look for them in tb_sym_root,
13523 tb_uop_root or tb_op, respectively. Thus the caller must already find
13524 the super-type and set p->overridden correctly. */
13527 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13528 gfc_typebound_proc
* p
, const char* name
)
13530 gfc_tbp_generic
* target
;
13531 gfc_symtree
* first_target
;
13532 gfc_symtree
* inherited
;
13534 gcc_assert (p
&& p
->is_generic
);
13536 /* Try to find the specific bindings for the symtrees in our target-list. */
13537 gcc_assert (p
->u
.generic
);
13538 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13539 if (!target
->specific
)
13541 gfc_typebound_proc
* overridden_tbp
;
13542 gfc_tbp_generic
* g
;
13543 const char* target_name
;
13545 target_name
= target
->specific_st
->name
;
13547 /* Defined for this type directly. */
13548 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13550 target
->specific
= target
->specific_st
->n
.tb
;
13551 goto specific_found
;
13554 /* Look for an inherited specific binding. */
13557 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13562 gcc_assert (inherited
->n
.tb
);
13563 target
->specific
= inherited
->n
.tb
;
13564 goto specific_found
;
13568 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13569 " at %L", target_name
, name
, &p
->where
);
13572 /* Once we've found the specific binding, check it is not ambiguous with
13573 other specifics already found or inherited for the same GENERIC. */
13575 gcc_assert (target
->specific
);
13577 /* This must really be a specific binding! */
13578 if (target
->specific
->is_generic
)
13580 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13581 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13585 /* Check those already resolved on this type directly. */
13586 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13587 if (g
!= target
&& g
->specific
13588 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13591 /* Check for ambiguity with inherited specific targets. */
13592 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13593 overridden_tbp
= overridden_tbp
->overridden
)
13594 if (overridden_tbp
->is_generic
)
13596 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13598 gcc_assert (g
->specific
);
13599 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13605 /* If we attempt to "overwrite" a specific binding, this is an error. */
13606 if (p
->overridden
&& !p
->overridden
->is_generic
)
13608 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13609 " the same name", name
, &p
->where
);
13613 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13614 all must have the same attributes here. */
13615 first_target
= p
->u
.generic
->specific
->u
.specific
;
13616 gcc_assert (first_target
);
13617 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13618 p
->function
= first_target
->n
.sym
->attr
.function
;
13624 /* Resolve a GENERIC procedure binding for a derived type. */
13627 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13629 gfc_symbol
* super_type
;
13631 /* Find the overridden binding if any. */
13632 st
->n
.tb
->overridden
= NULL
;
13633 super_type
= gfc_get_derived_super_type (derived
);
13636 gfc_symtree
* overridden
;
13637 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13640 if (overridden
&& overridden
->n
.tb
)
13641 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13644 /* Resolve using worker function. */
13645 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13649 /* Retrieve the target-procedure of an operator binding and do some checks in
13650 common for intrinsic and user-defined type-bound operators. */
13653 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13655 gfc_symbol
* target_proc
;
13657 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13658 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13659 gcc_assert (target_proc
);
13661 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13662 if (target
->specific
->nopass
)
13664 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13668 return target_proc
;
13672 /* Resolve a type-bound intrinsic operator. */
13675 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13676 gfc_typebound_proc
* p
)
13678 gfc_symbol
* super_type
;
13679 gfc_tbp_generic
* target
;
13681 /* If there's already an error here, do nothing (but don't fail again). */
13685 /* Operators should always be GENERIC bindings. */
13686 gcc_assert (p
->is_generic
);
13688 /* Look for an overridden binding. */
13689 super_type
= gfc_get_derived_super_type (derived
);
13690 if (super_type
&& super_type
->f2k_derived
)
13691 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13694 p
->overridden
= NULL
;
13696 /* Resolve general GENERIC properties using worker function. */
13697 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13700 /* Check the targets to be procedures of correct interface. */
13701 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13703 gfc_symbol
* target_proc
;
13705 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13709 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13712 /* Add target to non-typebound operator list. */
13713 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13714 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13716 gfc_interface
*head
, *intr
;
13718 /* Preempt 'gfc_check_new_interface' for submodules, where the
13719 mechanism for handling module procedures winds up resolving
13720 operator interfaces twice and would otherwise cause an error. */
13721 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13722 if (intr
->sym
== target_proc
13723 && target_proc
->attr
.used_in_submodule
)
13726 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13727 target_proc
, p
->where
))
13729 head
= derived
->ns
->op
[op
];
13730 intr
= gfc_get_interface ();
13731 intr
->sym
= target_proc
;
13732 intr
->where
= p
->where
;
13734 derived
->ns
->op
[op
] = intr
;
13746 /* Resolve a type-bound user operator (tree-walker callback). */
13748 static gfc_symbol
* resolve_bindings_derived
;
13749 static bool resolve_bindings_result
;
13751 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13754 resolve_typebound_user_op (gfc_symtree
* stree
)
13756 gfc_symbol
* super_type
;
13757 gfc_tbp_generic
* target
;
13759 gcc_assert (stree
&& stree
->n
.tb
);
13761 if (stree
->n
.tb
->error
)
13764 /* Operators should always be GENERIC bindings. */
13765 gcc_assert (stree
->n
.tb
->is_generic
);
13767 /* Find overridden procedure, if any. */
13768 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13769 if (super_type
&& super_type
->f2k_derived
)
13771 gfc_symtree
* overridden
;
13772 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13773 stree
->name
, true, NULL
);
13775 if (overridden
&& overridden
->n
.tb
)
13776 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13779 stree
->n
.tb
->overridden
= NULL
;
13781 /* Resolve basically using worker function. */
13782 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13785 /* Check the targets to be functions of correct interface. */
13786 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13788 gfc_symbol
* target_proc
;
13790 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13794 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13801 resolve_bindings_result
= false;
13802 stree
->n
.tb
->error
= 1;
13806 /* Resolve the type-bound procedures for a derived type. */
13809 resolve_typebound_procedure (gfc_symtree
* stree
)
13813 gfc_symbol
* me_arg
;
13814 gfc_symbol
* super_type
;
13815 gfc_component
* comp
;
13817 gcc_assert (stree
);
13819 /* Undefined specific symbol from GENERIC target definition. */
13823 if (stree
->n
.tb
->error
)
13826 /* If this is a GENERIC binding, use that routine. */
13827 if (stree
->n
.tb
->is_generic
)
13829 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13834 /* Get the target-procedure to check it. */
13835 gcc_assert (!stree
->n
.tb
->is_generic
);
13836 gcc_assert (stree
->n
.tb
->u
.specific
);
13837 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13838 where
= stree
->n
.tb
->where
;
13840 /* Default access should already be resolved from the parser. */
13841 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13843 if (stree
->n
.tb
->deferred
)
13845 if (!check_proc_interface (proc
, &where
))
13850 /* If proc has not been resolved at this point, proc->name may
13851 actually be a USE associated entity. See PR fortran/89647. */
13852 if (!proc
->resolved
13853 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13856 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13857 if (tmp
&& tmp
->attr
.use_assoc
)
13859 proc
->module
= tmp
->module
;
13860 proc
->attr
.proc
= tmp
->attr
.proc
;
13861 proc
->attr
.function
= tmp
->attr
.function
;
13862 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13863 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13864 proc
->ts
= tmp
->ts
;
13865 proc
->result
= tmp
->result
;
13869 /* Check for F08:C465. */
13870 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13871 || (proc
->attr
.proc
!= PROC_MODULE
13872 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13873 || proc
->attr
.abstract
)
13875 gfc_error ("%qs must be a module procedure or an external "
13876 "procedure with an explicit interface at %L",
13877 proc
->name
, &where
);
13882 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13883 stree
->n
.tb
->function
= proc
->attr
.function
;
13885 /* Find the super-type of the current derived type. We could do this once and
13886 store in a global if speed is needed, but as long as not I believe this is
13887 more readable and clearer. */
13888 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13890 /* If PASS, resolve and check arguments if not already resolved / loaded
13891 from a .mod file. */
13892 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13894 gfc_formal_arglist
*dummy_args
;
13896 dummy_args
= gfc_sym_get_dummy_args (proc
);
13897 if (stree
->n
.tb
->pass_arg
)
13899 gfc_formal_arglist
*i
;
13901 /* If an explicit passing argument name is given, walk the arg-list
13902 and look for it. */
13905 stree
->n
.tb
->pass_arg_num
= 1;
13906 for (i
= dummy_args
; i
; i
= i
->next
)
13908 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13913 ++stree
->n
.tb
->pass_arg_num
;
13918 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13920 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13921 stree
->n
.tb
->pass_arg
);
13927 /* Otherwise, take the first one; there should in fact be at least
13929 stree
->n
.tb
->pass_arg_num
= 1;
13932 gfc_error ("Procedure %qs with PASS at %L must have at"
13933 " least one argument", proc
->name
, &where
);
13936 me_arg
= dummy_args
->sym
;
13939 /* Now check that the argument-type matches and the passed-object
13940 dummy argument is generally fine. */
13942 gcc_assert (me_arg
);
13944 if (me_arg
->ts
.type
!= BT_CLASS
)
13946 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13947 " at %L", proc
->name
, &where
);
13951 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13952 != resolve_bindings_derived
)
13954 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13955 " the derived-type %qs", me_arg
->name
, proc
->name
,
13956 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13960 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13961 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13963 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13964 " scalar", proc
->name
, &where
);
13967 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13969 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13970 " be ALLOCATABLE", proc
->name
, &where
);
13973 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13975 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13976 " be POINTER", proc
->name
, &where
);
13981 /* If we are extending some type, check that we don't override a procedure
13982 flagged NON_OVERRIDABLE. */
13983 stree
->n
.tb
->overridden
= NULL
;
13986 gfc_symtree
* overridden
;
13987 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13988 stree
->name
, true, NULL
);
13992 if (overridden
->n
.tb
)
13993 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13995 if (!gfc_check_typebound_override (stree
, overridden
))
14000 /* See if there's a name collision with a component directly in this type. */
14001 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
14002 if (!strcmp (comp
->name
, stree
->name
))
14004 gfc_error ("Procedure %qs at %L has the same name as a component of"
14006 stree
->name
, &where
, resolve_bindings_derived
->name
);
14010 /* Try to find a name collision with an inherited component. */
14011 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
14014 gfc_error ("Procedure %qs at %L has the same name as an inherited"
14015 " component of %qs",
14016 stree
->name
, &where
, resolve_bindings_derived
->name
);
14020 stree
->n
.tb
->error
= 0;
14024 resolve_bindings_result
= false;
14025 stree
->n
.tb
->error
= 1;
14030 resolve_typebound_procedures (gfc_symbol
* derived
)
14033 gfc_symbol
* super_type
;
14035 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14038 super_type
= gfc_get_derived_super_type (derived
);
14040 resolve_symbol (super_type
);
14042 resolve_bindings_derived
= derived
;
14043 resolve_bindings_result
= true;
14045 if (derived
->f2k_derived
->tb_sym_root
)
14046 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14047 &resolve_typebound_procedure
);
14049 if (derived
->f2k_derived
->tb_uop_root
)
14050 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14051 &resolve_typebound_user_op
);
14053 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14055 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14056 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14057 (gfc_intrinsic_op
)op
, p
))
14058 resolve_bindings_result
= false;
14061 return resolve_bindings_result
;
14065 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14066 to give all identical derived types the same backend_decl. */
14068 add_dt_to_dt_list (gfc_symbol
*derived
)
14070 if (!derived
->dt_next
)
14072 if (gfc_derived_types
)
14074 derived
->dt_next
= gfc_derived_types
->dt_next
;
14075 gfc_derived_types
->dt_next
= derived
;
14079 derived
->dt_next
= derived
;
14081 gfc_derived_types
= derived
;
14086 /* Ensure that a derived-type is really not abstract, meaning that every
14087 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14090 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14095 if (!ensure_not_abstract_walker (sub
, st
->left
))
14097 if (!ensure_not_abstract_walker (sub
, st
->right
))
14100 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14102 gfc_symtree
* overriding
;
14103 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14106 gcc_assert (overriding
->n
.tb
);
14107 if (overriding
->n
.tb
->deferred
)
14109 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14110 " %qs is DEFERRED and not overridden",
14111 sub
->name
, &sub
->declared_at
, st
->name
);
14120 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14122 /* The algorithm used here is to recursively travel up the ancestry of sub
14123 and for each ancestor-type, check all bindings. If any of them is
14124 DEFERRED, look it up starting from sub and see if the found (overriding)
14125 binding is not DEFERRED.
14126 This is not the most efficient way to do this, but it should be ok and is
14127 clearer than something sophisticated. */
14129 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14131 if (!ancestor
->attr
.abstract
)
14134 /* Walk bindings of this ancestor. */
14135 if (ancestor
->f2k_derived
)
14138 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14143 /* Find next ancestor type and recurse on it. */
14144 ancestor
= gfc_get_derived_super_type (ancestor
);
14146 return ensure_not_abstract (sub
, ancestor
);
14152 /* This check for typebound defined assignments is done recursively
14153 since the order in which derived types are resolved is not always in
14154 order of the declarations. */
14157 check_defined_assignments (gfc_symbol
*derived
)
14161 for (c
= derived
->components
; c
; c
= c
->next
)
14163 if (!gfc_bt_struct (c
->ts
.type
)
14165 || c
->attr
.allocatable
14166 || c
->attr
.proc_pointer_comp
14167 || c
->attr
.class_pointer
14168 || c
->attr
.proc_pointer
)
14171 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14172 || (c
->ts
.u
.derived
->f2k_derived
14173 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14175 derived
->attr
.defined_assign_comp
= 1;
14179 check_defined_assignments (c
->ts
.u
.derived
);
14180 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14182 derived
->attr
.defined_assign_comp
= 1;
14189 /* Resolve a single component of a derived type or structure. */
14192 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14194 gfc_symbol
*super_type
;
14195 symbol_attribute
*attr
;
14197 if (c
->attr
.artificial
)
14200 /* Do not allow vtype components to be resolved in nameless namespaces
14201 such as block data because the procedure pointers will cause ICEs
14202 and vtables are not needed in these contexts. */
14203 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14204 && sym
->ns
->proc_name
== NULL
)
14208 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14209 && c
->attr
.codimension
14210 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14212 gfc_error ("Coarray component %qs at %L must be allocatable with "
14213 "deferred shape", c
->name
, &c
->loc
);
14218 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14219 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14221 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14222 "shall not be a coarray", c
->name
, &c
->loc
);
14227 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14228 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14229 || c
->attr
.allocatable
))
14231 gfc_error ("Component %qs at %L with coarray component "
14232 "shall be a nonpointer, nonallocatable scalar",
14238 if (c
->ts
.type
== BT_CLASS
)
14240 if (CLASS_DATA (c
))
14242 attr
= &(CLASS_DATA (c
)->attr
);
14244 /* Fix up contiguous attribute. */
14245 if (c
->attr
.contiguous
)
14246 attr
->contiguous
= 1;
14254 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14256 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14257 "is not an array pointer", c
->name
, &c
->loc
);
14261 /* F2003, 15.2.1 - length has to be one. */
14262 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14263 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14264 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14265 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14267 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14272 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14274 gfc_symbol
*ifc
= c
->ts
.interface
;
14276 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14282 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14284 /* Resolve interface and copy attributes. */
14285 if (ifc
->formal
&& !ifc
->formal_ns
)
14286 resolve_symbol (ifc
);
14287 if (ifc
->attr
.intrinsic
)
14288 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14292 c
->ts
= ifc
->result
->ts
;
14293 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14294 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14295 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14296 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14297 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14302 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14303 c
->attr
.pointer
= ifc
->attr
.pointer
;
14304 c
->attr
.dimension
= ifc
->attr
.dimension
;
14305 c
->as
= gfc_copy_array_spec (ifc
->as
);
14306 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14308 c
->ts
.interface
= ifc
;
14309 c
->attr
.function
= ifc
->attr
.function
;
14310 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14312 c
->attr
.pure
= ifc
->attr
.pure
;
14313 c
->attr
.elemental
= ifc
->attr
.elemental
;
14314 c
->attr
.recursive
= ifc
->attr
.recursive
;
14315 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14316 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14317 /* Copy char length. */
14318 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14320 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14321 if (cl
->length
&& !cl
->resolved
14322 && !gfc_resolve_expr (cl
->length
))
14331 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14333 /* Since PPCs are not implicitly typed, a PPC without an explicit
14334 interface must be a subroutine. */
14335 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14338 /* Procedure pointer components: Check PASS arg. */
14339 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14340 && !sym
->attr
.vtype
)
14342 gfc_symbol
* me_arg
;
14344 if (c
->tb
->pass_arg
)
14346 gfc_formal_arglist
* i
;
14348 /* If an explicit passing argument name is given, walk the arg-list
14349 and look for it. */
14352 c
->tb
->pass_arg_num
= 1;
14353 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14355 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14360 c
->tb
->pass_arg_num
++;
14365 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14366 "at %L has no argument %qs", c
->name
,
14367 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14374 /* Otherwise, take the first one; there should in fact be at least
14376 c
->tb
->pass_arg_num
= 1;
14377 if (!c
->ts
.interface
->formal
)
14379 gfc_error ("Procedure pointer component %qs with PASS at %L "
14380 "must have at least one argument",
14385 me_arg
= c
->ts
.interface
->formal
->sym
;
14388 /* Now check that the argument-type matches. */
14389 gcc_assert (me_arg
);
14390 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14391 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14392 || (me_arg
->ts
.type
== BT_CLASS
14393 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14395 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14396 " the derived type %qs", me_arg
->name
, c
->name
,
14397 me_arg
->name
, &c
->loc
, sym
->name
);
14402 /* Check for F03:C453. */
14403 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14405 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14406 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14412 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14414 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14415 "may not have the POINTER attribute", me_arg
->name
,
14416 c
->name
, me_arg
->name
, &c
->loc
);
14421 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14423 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14424 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14425 me_arg
->name
, &c
->loc
);
14430 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14432 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14433 " at %L", c
->name
, &c
->loc
);
14439 /* Check type-spec if this is not the parent-type component. */
14440 if (((sym
->attr
.is_class
14441 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14442 || c
!= sym
->components
->ts
.u
.derived
->components
))
14443 || (!sym
->attr
.is_class
14444 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14445 && !sym
->attr
.vtype
14446 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14449 super_type
= gfc_get_derived_super_type (sym
);
14451 /* If this type is an extension, set the accessibility of the parent
14454 && ((sym
->attr
.is_class
14455 && c
== sym
->components
->ts
.u
.derived
->components
)
14456 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14457 && strcmp (super_type
->name
, c
->name
) == 0)
14458 c
->attr
.access
= super_type
->attr
.access
;
14460 /* If this type is an extension, see if this component has the same name
14461 as an inherited type-bound procedure. */
14462 if (super_type
&& !sym
->attr
.is_class
14463 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14465 gfc_error ("Component %qs of %qs at %L has the same name as an"
14466 " inherited type-bound procedure",
14467 c
->name
, sym
->name
, &c
->loc
);
14471 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14472 && !c
->ts
.deferred
)
14474 if (c
->ts
.u
.cl
->length
== NULL
14475 || (!resolve_charlen(c
->ts
.u
.cl
))
14476 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14478 gfc_error ("Character length of component %qs needs to "
14479 "be a constant specification expression at %L",
14481 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14486 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14487 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14489 gfc_error ("Character component %qs of %qs at %L with deferred "
14490 "length must be a POINTER or ALLOCATABLE",
14491 c
->name
, sym
->name
, &c
->loc
);
14495 /* Add the hidden deferred length field. */
14496 if (c
->ts
.type
== BT_CHARACTER
14497 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14498 && !c
->attr
.function
14499 && !sym
->attr
.is_class
)
14501 char name
[GFC_MAX_SYMBOL_LEN
+9];
14502 gfc_component
*strlen
;
14503 sprintf (name
, "_%s_length", c
->name
);
14504 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14505 if (strlen
== NULL
)
14507 if (!gfc_add_component (sym
, name
, &strlen
))
14509 strlen
->ts
.type
= BT_INTEGER
;
14510 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14511 strlen
->attr
.access
= ACCESS_PRIVATE
;
14512 strlen
->attr
.artificial
= 1;
14516 if (c
->ts
.type
== BT_DERIVED
14517 && sym
->component_access
!= ACCESS_PRIVATE
14518 && gfc_check_symbol_access (sym
)
14519 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14520 && !c
->ts
.u
.derived
->attr
.use_assoc
14521 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14522 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14523 "PRIVATE type and cannot be a component of "
14524 "%qs, which is PUBLIC at %L", c
->name
,
14525 sym
->name
, &sym
->declared_at
))
14528 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14530 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14531 "type %s", c
->name
, &c
->loc
, sym
->name
);
14535 if (sym
->attr
.sequence
)
14537 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14539 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14540 "not have the SEQUENCE attribute",
14541 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14546 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14547 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14548 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14549 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14550 CLASS_DATA (c
)->ts
.u
.derived
14551 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14553 /* If an allocatable component derived type is of the same type as
14554 the enclosing derived type, we need a vtable generating so that
14555 the __deallocate procedure is created. */
14556 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14557 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14558 gfc_find_vtab (&c
->ts
);
14560 /* Ensure that all the derived type components are put on the
14561 derived type list; even in formal namespaces, where derived type
14562 pointer components might not have been declared. */
14563 if (c
->ts
.type
== BT_DERIVED
14565 && c
->ts
.u
.derived
->components
14567 && sym
!= c
->ts
.u
.derived
)
14568 add_dt_to_dt_list (c
->ts
.u
.derived
);
14570 if (!gfc_resolve_array_spec (c
->as
,
14571 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14572 || c
->attr
.allocatable
)))
14575 if (c
->initializer
&& !sym
->attr
.vtype
14576 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14577 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14584 /* Be nice about the locus for a structure expression - show the locus of the
14585 first non-null sub-expression if we can. */
14588 cons_where (gfc_expr
*struct_expr
)
14590 gfc_constructor
*cons
;
14592 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14594 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14595 for (; cons
; cons
= gfc_constructor_next (cons
))
14597 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14598 return &cons
->expr
->where
;
14601 return &struct_expr
->where
;
14604 /* Resolve the components of a structure type. Much less work than derived
14608 resolve_fl_struct (gfc_symbol
*sym
)
14611 gfc_expr
*init
= NULL
;
14614 /* Make sure UNIONs do not have overlapping initializers. */
14615 if (sym
->attr
.flavor
== FL_UNION
)
14617 for (c
= sym
->components
; c
; c
= c
->next
)
14619 if (init
&& c
->initializer
)
14621 gfc_error ("Conflicting initializers in union at %L and %L",
14622 cons_where (init
), cons_where (c
->initializer
));
14623 gfc_free_expr (c
->initializer
);
14624 c
->initializer
= NULL
;
14627 init
= c
->initializer
;
14632 for (c
= sym
->components
; c
; c
= c
->next
)
14633 if (!resolve_component (c
, sym
))
14639 if (sym
->components
)
14640 add_dt_to_dt_list (sym
);
14646 /* Resolve the components of a derived type. This does not have to wait until
14647 resolution stage, but can be done as soon as the dt declaration has been
14651 resolve_fl_derived0 (gfc_symbol
*sym
)
14653 gfc_symbol
* super_type
;
14655 gfc_formal_arglist
*f
;
14658 if (sym
->attr
.unlimited_polymorphic
)
14661 super_type
= gfc_get_derived_super_type (sym
);
14664 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14666 gfc_error ("As extending type %qs at %L has a coarray component, "
14667 "parent type %qs shall also have one", sym
->name
,
14668 &sym
->declared_at
, super_type
->name
);
14672 /* Ensure the extended type gets resolved before we do. */
14673 if (super_type
&& !resolve_fl_derived0 (super_type
))
14676 /* An ABSTRACT type must be extensible. */
14677 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14679 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14680 sym
->name
, &sym
->declared_at
);
14684 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14688 for ( ; c
!= NULL
; c
= c
->next
)
14689 if (!resolve_component (c
, sym
))
14695 /* Now add the caf token field, where needed. */
14696 if (flag_coarray
!= GFC_FCOARRAY_NONE
14697 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14699 for (c
= sym
->components
; c
; c
= c
->next
)
14700 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14701 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14703 char name
[GFC_MAX_SYMBOL_LEN
+9];
14704 gfc_component
*token
;
14705 sprintf (name
, "_caf_%s", c
->name
);
14706 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14709 if (!gfc_add_component (sym
, name
, &token
))
14711 token
->ts
.type
= BT_VOID
;
14712 token
->ts
.kind
= gfc_default_integer_kind
;
14713 token
->attr
.access
= ACCESS_PRIVATE
;
14714 token
->attr
.artificial
= 1;
14715 token
->attr
.caf_token
= 1;
14720 check_defined_assignments (sym
);
14722 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14723 sym
->attr
.defined_assign_comp
14724 = super_type
->attr
.defined_assign_comp
;
14726 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14727 all DEFERRED bindings are overridden. */
14728 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14729 && !sym
->attr
.is_class
14730 && !ensure_not_abstract (sym
, super_type
))
14733 /* Check that there is a component for every PDT parameter. */
14734 if (sym
->attr
.pdt_template
)
14736 for (f
= sym
->formal
; f
; f
= f
->next
)
14740 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14743 gfc_error ("Parameterized type %qs does not have a component "
14744 "corresponding to parameter %qs at %L", sym
->name
,
14745 f
->sym
->name
, &sym
->declared_at
);
14751 /* Add derived type to the derived type list. */
14752 add_dt_to_dt_list (sym
);
14758 /* The following procedure does the full resolution of a derived type,
14759 including resolution of all type-bound procedures (if present). In contrast
14760 to 'resolve_fl_derived0' this can only be done after the module has been
14761 parsed completely. */
14764 resolve_fl_derived (gfc_symbol
*sym
)
14766 gfc_symbol
*gen_dt
= NULL
;
14768 if (sym
->attr
.unlimited_polymorphic
)
14771 if (!sym
->attr
.is_class
)
14772 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14773 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14774 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14775 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14776 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14777 "%qs at %L being the same name as derived "
14778 "type at %L", sym
->name
,
14779 gen_dt
->generic
->sym
== sym
14780 ? gen_dt
->generic
->next
->sym
->name
14781 : gen_dt
->generic
->sym
->name
,
14782 gen_dt
->generic
->sym
== sym
14783 ? &gen_dt
->generic
->next
->sym
->declared_at
14784 : &gen_dt
->generic
->sym
->declared_at
,
14785 &sym
->declared_at
))
14788 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14790 gfc_error ("Derived type %qs at %L has not been declared",
14791 sym
->name
, &sym
->declared_at
);
14795 /* Resolve the finalizer procedures. */
14796 if (!gfc_resolve_finalizers (sym
, NULL
))
14799 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14801 /* Fix up incomplete CLASS symbols. */
14802 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14803 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14805 /* Nothing more to do for unlimited polymorphic entities. */
14806 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14808 else if (vptr
->ts
.u
.derived
== NULL
)
14810 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14812 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14813 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14818 if (!resolve_fl_derived0 (sym
))
14821 /* Resolve the type-bound procedures. */
14822 if (!resolve_typebound_procedures (sym
))
14825 /* Generate module vtables subject to their accessibility and their not
14826 being vtables or pdt templates. If this is not done class declarations
14827 in external procedures wind up with their own version and so SELECT TYPE
14828 fails because the vptrs do not have the same address. */
14829 if (gfc_option
.allow_std
& GFC_STD_F2003
14830 && sym
->ns
->proc_name
14831 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14832 && sym
->attr
.access
!= ACCESS_PRIVATE
14833 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14835 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14836 gfc_set_sym_referenced (vtab
);
14844 resolve_fl_namelist (gfc_symbol
*sym
)
14849 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14851 /* Check again, the check in match only works if NAMELIST comes
14853 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14855 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14856 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14860 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14861 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14862 "with assumed shape in namelist %qs at %L",
14863 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14866 if (is_non_constant_shape_array (nl
->sym
)
14867 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14868 "with nonconstant shape in namelist %qs at %L",
14869 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14872 if (nl
->sym
->ts
.type
== BT_CHARACTER
14873 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14874 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14875 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14876 "nonconstant character length in "
14877 "namelist %qs at %L", nl
->sym
->name
,
14878 sym
->name
, &sym
->declared_at
))
14883 /* Reject PRIVATE objects in a PUBLIC namelist. */
14884 if (gfc_check_symbol_access (sym
))
14886 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14888 if (!nl
->sym
->attr
.use_assoc
14889 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14890 && !gfc_check_symbol_access (nl
->sym
))
14892 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14893 "cannot be member of PUBLIC namelist %qs at %L",
14894 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14898 if (nl
->sym
->ts
.type
== BT_DERIVED
14899 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14900 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14902 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14903 "namelist %qs at %L with ALLOCATABLE "
14904 "or POINTER components", nl
->sym
->name
,
14905 sym
->name
, &sym
->declared_at
))
14910 /* Types with private components that came here by USE-association. */
14911 if (nl
->sym
->ts
.type
== BT_DERIVED
14912 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14914 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14915 "components and cannot be member of namelist %qs at %L",
14916 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14920 /* Types with private components that are defined in the same module. */
14921 if (nl
->sym
->ts
.type
== BT_DERIVED
14922 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14923 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14925 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14926 "cannot be a member of PUBLIC namelist %qs at %L",
14927 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14934 /* 14.1.2 A module or internal procedure represent local entities
14935 of the same type as a namelist member and so are not allowed. */
14936 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14938 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14941 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14942 if ((nl
->sym
== sym
->ns
->proc_name
)
14944 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14949 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14950 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14952 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14953 "attribute in %qs at %L", nlsym
->name
,
14954 &sym
->declared_at
);
14961 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14962 nl
->sym
->attr
.asynchronous
= 1;
14969 resolve_fl_parameter (gfc_symbol
*sym
)
14971 /* A parameter array's shape needs to be constant. */
14972 if (sym
->as
!= NULL
14973 && (sym
->as
->type
== AS_DEFERRED
14974 || is_non_constant_shape_array (sym
)))
14976 gfc_error ("Parameter array %qs at %L cannot be automatic "
14977 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14981 /* Constraints on deferred type parameter. */
14982 if (!deferred_requirements (sym
))
14985 /* Make sure a parameter that has been implicitly typed still
14986 matches the implicit type, since PARAMETER statements can precede
14987 IMPLICIT statements. */
14988 if (sym
->attr
.implicit_type
14989 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14992 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14993 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14997 /* Make sure the types of derived parameters are consistent. This
14998 type checking is deferred until resolution because the type may
14999 refer to a derived type from the host. */
15000 if (sym
->ts
.type
== BT_DERIVED
15001 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
15003 gfc_error ("Incompatible derived type in PARAMETER at %L",
15004 &sym
->value
->where
);
15008 /* F03:C509,C514. */
15009 if (sym
->ts
.type
== BT_CLASS
)
15011 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
15012 sym
->name
, &sym
->declared_at
);
15020 /* Called by resolve_symbol to check PDTs. */
15023 resolve_pdt (gfc_symbol
* sym
)
15025 gfc_symbol
*derived
= NULL
;
15026 gfc_actual_arglist
*param
;
15028 bool const_len_exprs
= true;
15029 bool assumed_len_exprs
= false;
15030 symbol_attribute
*attr
;
15032 if (sym
->ts
.type
== BT_DERIVED
)
15034 derived
= sym
->ts
.u
.derived
;
15035 attr
= &(sym
->attr
);
15037 else if (sym
->ts
.type
== BT_CLASS
)
15039 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15040 attr
= &(CLASS_DATA (sym
)->attr
);
15043 gcc_unreachable ();
15045 gcc_assert (derived
->attr
.pdt_type
);
15047 for (param
= sym
->param_list
; param
; param
= param
->next
)
15049 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15051 if (c
->attr
.pdt_kind
)
15054 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15055 && c
->attr
.pdt_len
)
15056 const_len_exprs
= false;
15057 else if (param
->spec_type
== SPEC_ASSUMED
)
15058 assumed_len_exprs
= true;
15060 if (param
->spec_type
== SPEC_DEFERRED
15061 && !attr
->allocatable
&& !attr
->pointer
)
15062 gfc_error ("The object %qs at %L has a deferred LEN "
15063 "parameter %qs and is neither allocatable "
15064 "nor a pointer", sym
->name
, &sym
->declared_at
,
15069 if (!const_len_exprs
15070 && (sym
->ns
->proc_name
->attr
.is_main_program
15071 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15072 || sym
->attr
.save
!= SAVE_NONE
))
15073 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15074 "SAVE attribute or be a variable declared in the "
15075 "main program, a module or a submodule(F08/C513)",
15076 sym
->name
, &sym
->declared_at
);
15078 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15079 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15080 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15081 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15082 sym
->name
, &sym
->declared_at
);
15086 /* Do anything necessary to resolve a symbol. Right now, we just
15087 assume that an otherwise unknown symbol is a variable. This sort
15088 of thing commonly happens for symbols in module. */
15091 resolve_symbol (gfc_symbol
*sym
)
15093 int check_constant
, mp_flag
;
15094 gfc_symtree
*symtree
;
15095 gfc_symtree
*this_symtree
;
15098 symbol_attribute class_attr
;
15099 gfc_array_spec
*as
;
15100 bool saved_specification_expr
;
15106 /* No symbol will ever have union type; only components can be unions.
15107 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15108 (just like derived type declaration symbols have flavor FL_DERIVED). */
15109 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15111 /* Coarrayed polymorphic objects with allocatable or pointer components are
15112 yet unsupported for -fcoarray=lib. */
15113 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15114 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15115 && CLASS_DATA (sym
)->attr
.codimension
15116 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15117 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15119 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15120 "type coarrays at %L are unsupported", &sym
->declared_at
);
15124 if (sym
->attr
.artificial
)
15127 if (sym
->attr
.unlimited_polymorphic
)
15130 if (sym
->attr
.flavor
== FL_UNKNOWN
15131 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15132 && !sym
->attr
.generic
&& !sym
->attr
.external
15133 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15134 && sym
->ts
.type
== BT_UNKNOWN
))
15137 /* If we find that a flavorless symbol is an interface in one of the
15138 parent namespaces, find its symtree in this namespace, free the
15139 symbol and set the symtree to point to the interface symbol. */
15140 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15142 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15143 if (symtree
&& (symtree
->n
.sym
->generic
||
15144 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15145 && sym
->ns
->construct_entities
)))
15147 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15149 if (this_symtree
->n
.sym
== sym
)
15151 symtree
->n
.sym
->refs
++;
15152 gfc_release_symbol (sym
);
15153 this_symtree
->n
.sym
= symtree
->n
.sym
;
15159 /* Otherwise give it a flavor according to such attributes as
15161 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15162 && sym
->attr
.intrinsic
== 0)
15163 sym
->attr
.flavor
= FL_VARIABLE
;
15164 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15166 sym
->attr
.flavor
= FL_PROCEDURE
;
15167 if (sym
->attr
.dimension
)
15168 sym
->attr
.function
= 1;
15172 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15173 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15175 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15176 && !resolve_procedure_interface (sym
))
15179 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15180 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15182 if (sym
->attr
.external
)
15183 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15184 "at %L", &sym
->declared_at
);
15186 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15187 "at %L", &sym
->declared_at
);
15192 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15195 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15196 && !resolve_fl_struct (sym
))
15199 /* Symbols that are module procedures with results (functions) have
15200 the types and array specification copied for type checking in
15201 procedures that call them, as well as for saving to a module
15202 file. These symbols can't stand the scrutiny that their results
15204 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15206 /* Make sure that the intrinsic is consistent with its internal
15207 representation. This needs to be done before assigning a default
15208 type to avoid spurious warnings. */
15209 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15210 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15213 /* Resolve associate names. */
15215 resolve_assoc_var (sym
, true);
15217 /* Assign default type to symbols that need one and don't have one. */
15218 if (sym
->ts
.type
== BT_UNKNOWN
)
15220 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15222 gfc_set_default_type (sym
, 1, NULL
);
15225 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15226 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15227 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15228 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15230 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15232 /* The specific case of an external procedure should emit an error
15233 in the case that there is no implicit type. */
15236 if (!sym
->attr
.mixed_entry_master
)
15237 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15241 /* Result may be in another namespace. */
15242 resolve_symbol (sym
->result
);
15244 if (!sym
->result
->attr
.proc_pointer
)
15246 sym
->ts
= sym
->result
->ts
;
15247 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15248 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15249 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15250 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15251 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15256 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15258 bool saved_specification_expr
= specification_expr
;
15259 specification_expr
= true;
15260 gfc_resolve_array_spec (sym
->result
->as
, false);
15261 specification_expr
= saved_specification_expr
;
15264 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15266 as
= CLASS_DATA (sym
)->as
;
15267 class_attr
= CLASS_DATA (sym
)->attr
;
15268 class_attr
.pointer
= class_attr
.class_pointer
;
15272 class_attr
= sym
->attr
;
15277 if (sym
->attr
.contiguous
15278 && (!class_attr
.dimension
15279 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15280 && !class_attr
.pointer
)))
15282 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15283 "array pointer or an assumed-shape or assumed-rank array",
15284 sym
->name
, &sym
->declared_at
);
15288 /* Assumed size arrays and assumed shape arrays must be dummy
15289 arguments. Array-spec's of implied-shape should have been resolved to
15290 AS_EXPLICIT already. */
15294 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15295 specification expression. */
15296 if (as
->type
== AS_IMPLIED_SHAPE
)
15299 for (i
=0; i
<as
->rank
; i
++)
15301 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15303 gfc_error ("Bad specification for assumed size array at %L",
15304 &as
->lower
[i
]->where
);
15311 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15312 || as
->type
== AS_ASSUMED_SHAPE
)
15313 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15315 if (as
->type
== AS_ASSUMED_SIZE
)
15316 gfc_error ("Assumed size array at %L must be a dummy argument",
15317 &sym
->declared_at
);
15319 gfc_error ("Assumed shape array at %L must be a dummy argument",
15320 &sym
->declared_at
);
15323 /* TS 29113, C535a. */
15324 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15325 && !sym
->attr
.select_type_temporary
15326 && !(cs_base
&& cs_base
->current
15327 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15329 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15330 &sym
->declared_at
);
15333 if (as
->type
== AS_ASSUMED_RANK
15334 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15336 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15337 "CODIMENSION attribute", &sym
->declared_at
);
15342 /* Make sure symbols with known intent or optional are really dummy
15343 variable. Because of ENTRY statement, this has to be deferred
15344 until resolution time. */
15346 if (!sym
->attr
.dummy
15347 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15349 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15353 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15355 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15356 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15360 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15362 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15363 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15365 gfc_error ("Character dummy variable %qs at %L with VALUE "
15366 "attribute must have constant length",
15367 sym
->name
, &sym
->declared_at
);
15371 if (sym
->ts
.is_c_interop
15372 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15374 gfc_error ("C interoperable character dummy variable %qs at %L "
15375 "with VALUE attribute must have length one",
15376 sym
->name
, &sym
->declared_at
);
15381 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15382 && sym
->ts
.u
.derived
->attr
.generic
)
15384 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15385 if (!sym
->ts
.u
.derived
)
15387 gfc_error ("The derived type %qs at %L is of type %qs, "
15388 "which has not been defined", sym
->name
,
15389 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15390 sym
->ts
.type
= BT_UNKNOWN
;
15395 /* Use the same constraints as TYPE(*), except for the type check
15396 and that only scalars and assumed-size arrays are permitted. */
15397 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15399 if (!sym
->attr
.dummy
)
15401 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15402 "a dummy argument", sym
->name
, &sym
->declared_at
);
15406 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15407 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15408 && sym
->ts
.type
!= BT_COMPLEX
)
15410 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15411 "of type TYPE(*) or of an numeric intrinsic type",
15412 sym
->name
, &sym
->declared_at
);
15416 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15417 || sym
->attr
.pointer
|| sym
->attr
.value
)
15419 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15420 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15421 "attribute", sym
->name
, &sym
->declared_at
);
15425 if (sym
->attr
.intent
== INTENT_OUT
)
15427 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15428 "have the INTENT(OUT) attribute",
15429 sym
->name
, &sym
->declared_at
);
15432 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15434 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15435 "either be a scalar or an assumed-size array",
15436 sym
->name
, &sym
->declared_at
);
15440 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15441 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15443 sym
->ts
.type
= BT_ASSUMED
;
15444 sym
->as
= gfc_get_array_spec ();
15445 sym
->as
->type
= AS_ASSUMED_SIZE
;
15447 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15449 else if (sym
->ts
.type
== BT_ASSUMED
)
15451 /* TS 29113, C407a. */
15452 if (!sym
->attr
.dummy
)
15454 gfc_error ("Assumed type of variable %s at %L is only permitted "
15455 "for dummy variables", sym
->name
, &sym
->declared_at
);
15458 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15459 || sym
->attr
.pointer
|| sym
->attr
.value
)
15461 gfc_error ("Assumed-type variable %s at %L may not have the "
15462 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15463 sym
->name
, &sym
->declared_at
);
15466 if (sym
->attr
.intent
== INTENT_OUT
)
15468 gfc_error ("Assumed-type variable %s at %L may not have the "
15469 "INTENT(OUT) attribute",
15470 sym
->name
, &sym
->declared_at
);
15473 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15475 gfc_error ("Assumed-type variable %s at %L shall not be an "
15476 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15481 /* If the symbol is marked as bind(c), that it is declared at module level
15482 scope and verify its type and kind. Do not do the latter for symbols
15483 that are implicitly typed because that is handled in
15484 gfc_set_default_type. Handle dummy arguments and procedure definitions
15485 separately. Also, anything that is use associated is not handled here
15486 but instead is handled in the module it is declared in. Finally, derived
15487 type definitions are allowed to be BIND(C) since that only implies that
15488 they're interoperable, and they are checked fully for interoperability
15489 when a variable is declared of that type. */
15490 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15491 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15492 && sym
->attr
.flavor
!= FL_DERIVED
)
15496 /* First, make sure the variable is declared at the
15497 module-level scope (J3/04-007, Section 15.3). */
15498 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15499 sym
->attr
.in_common
== 0)
15501 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15502 "is neither a COMMON block nor declared at the "
15503 "module level scope", sym
->name
, &(sym
->declared_at
));
15506 else if (sym
->ts
.type
== BT_CHARACTER
15507 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15508 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15509 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15511 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15512 sym
->name
, &sym
->declared_at
);
15515 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15517 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15519 else if (sym
->attr
.implicit_type
== 0)
15521 /* If type() declaration, we need to verify that the components
15522 of the given type are all C interoperable, etc. */
15523 if (sym
->ts
.type
== BT_DERIVED
&&
15524 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15526 /* Make sure the user marked the derived type as BIND(C). If
15527 not, call the verify routine. This could print an error
15528 for the derived type more than once if multiple variables
15529 of that type are declared. */
15530 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15531 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15535 /* Verify the variable itself as C interoperable if it
15536 is BIND(C). It is not possible for this to succeed if
15537 the verify_bind_c_derived_type failed, so don't have to handle
15538 any error returned by verify_bind_c_derived_type. */
15539 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15540 sym
->common_block
);
15545 /* clear the is_bind_c flag to prevent reporting errors more than
15546 once if something failed. */
15547 sym
->attr
.is_bind_c
= 0;
15552 /* If a derived type symbol has reached this point, without its
15553 type being declared, we have an error. Notice that most
15554 conditions that produce undefined derived types have already
15555 been dealt with. However, the likes of:
15556 implicit type(t) (t) ..... call foo (t) will get us here if
15557 the type is not declared in the scope of the implicit
15558 statement. Change the type to BT_UNKNOWN, both because it is so
15559 and to prevent an ICE. */
15560 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15561 && sym
->ts
.u
.derived
->components
== NULL
15562 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15564 gfc_error ("The derived type %qs at %L is of type %qs, "
15565 "which has not been defined", sym
->name
,
15566 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15567 sym
->ts
.type
= BT_UNKNOWN
;
15571 /* Make sure that the derived type has been resolved and that the
15572 derived type is visible in the symbol's namespace, if it is a
15573 module function and is not PRIVATE. */
15574 if (sym
->ts
.type
== BT_DERIVED
15575 && sym
->ts
.u
.derived
->attr
.use_assoc
15576 && sym
->ns
->proc_name
15577 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15578 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15581 /* Unless the derived-type declaration is use associated, Fortran 95
15582 does not allow public entries of private derived types.
15583 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15584 161 in 95-006r3. */
15585 if (sym
->ts
.type
== BT_DERIVED
15586 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15587 && !sym
->ts
.u
.derived
->attr
.use_assoc
15588 && gfc_check_symbol_access (sym
)
15589 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15590 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15591 "derived type %qs",
15592 (sym
->attr
.flavor
== FL_PARAMETER
)
15593 ? "parameter" : "variable",
15594 sym
->name
, &sym
->declared_at
,
15595 sym
->ts
.u
.derived
->name
))
15598 /* F2008, C1302. */
15599 if (sym
->ts
.type
== BT_DERIVED
15600 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15601 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15602 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15603 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15605 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15606 "type LOCK_TYPE must be a coarray", sym
->name
,
15607 &sym
->declared_at
);
15611 /* TS18508, C702/C703. */
15612 if (sym
->ts
.type
== BT_DERIVED
15613 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15614 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15615 || sym
->ts
.u
.derived
->attr
.event_comp
)
15616 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15618 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15619 "type EVENT_TYPE must be a coarray", sym
->name
,
15620 &sym
->declared_at
);
15624 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15625 default initialization is defined (5.1.2.4.4). */
15626 if (sym
->ts
.type
== BT_DERIVED
15628 && sym
->attr
.intent
== INTENT_OUT
15630 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15632 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15634 if (c
->initializer
)
15636 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15637 "ASSUMED SIZE and so cannot have a default initializer",
15638 sym
->name
, &sym
->declared_at
);
15645 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15646 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15648 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15649 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15654 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15655 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15657 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15658 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15663 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15664 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15665 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15666 || class_attr
.codimension
)
15667 && (sym
->attr
.result
|| sym
->result
== sym
))
15669 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15670 "a coarray component", sym
->name
, &sym
->declared_at
);
15675 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15676 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15678 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15679 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15684 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15685 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15686 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15687 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15688 || class_attr
.allocatable
))
15690 gfc_error ("Variable %qs at %L with coarray component shall be a "
15691 "nonpointer, nonallocatable scalar, which is not a coarray",
15692 sym
->name
, &sym
->declared_at
);
15696 /* F2008, C526. The function-result case was handled above. */
15697 if (class_attr
.codimension
15698 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15699 || sym
->attr
.select_type_temporary
15700 || sym
->attr
.associate_var
15701 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15702 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15703 || sym
->ns
->proc_name
->attr
.is_main_program
15704 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15706 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15707 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15711 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15712 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15714 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15715 "deferred shape", sym
->name
, &sym
->declared_at
);
15718 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15719 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15721 gfc_error ("Allocatable coarray variable %qs at %L must have "
15722 "deferred shape", sym
->name
, &sym
->declared_at
);
15727 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15728 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15729 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15730 || (class_attr
.codimension
&& class_attr
.allocatable
))
15731 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15733 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15734 "allocatable coarray or have coarray components",
15735 sym
->name
, &sym
->declared_at
);
15739 if (class_attr
.codimension
&& sym
->attr
.dummy
15740 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15742 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15743 "procedure %qs", sym
->name
, &sym
->declared_at
,
15744 sym
->ns
->proc_name
->name
);
15748 if (sym
->ts
.type
== BT_LOGICAL
15749 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15750 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15751 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15754 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15755 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15757 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15758 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15759 "%L with non-C_Bool kind in BIND(C) procedure "
15760 "%qs", sym
->name
, &sym
->declared_at
,
15761 sym
->ns
->proc_name
->name
))
15763 else if (!gfc_logical_kinds
[i
].c_bool
15764 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15765 "%qs at %L with non-C_Bool kind in "
15766 "BIND(C) procedure %qs", sym
->name
,
15768 sym
->attr
.function
? sym
->name
15769 : sym
->ns
->proc_name
->name
))
15773 switch (sym
->attr
.flavor
)
15776 if (!resolve_fl_variable (sym
, mp_flag
))
15781 if (sym
->formal
&& !sym
->formal_ns
)
15783 /* Check that none of the arguments are a namelist. */
15784 gfc_formal_arglist
*formal
= sym
->formal
;
15786 for (; formal
; formal
= formal
->next
)
15787 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15789 gfc_error ("Namelist %qs cannot be an argument to "
15790 "subroutine or function at %L",
15791 formal
->sym
->name
, &sym
->declared_at
);
15796 if (!resolve_fl_procedure (sym
, mp_flag
))
15801 if (!resolve_fl_namelist (sym
))
15806 if (!resolve_fl_parameter (sym
))
15814 /* Resolve array specifier. Check as well some constraints
15815 on COMMON blocks. */
15817 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15819 /* Set the formal_arg_flag so that check_conflict will not throw
15820 an error for host associated variables in the specification
15821 expression for an array_valued function. */
15822 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15823 formal_arg_flag
= true;
15825 saved_specification_expr
= specification_expr
;
15826 specification_expr
= true;
15827 gfc_resolve_array_spec (sym
->as
, check_constant
);
15828 specification_expr
= saved_specification_expr
;
15830 formal_arg_flag
= false;
15832 /* Resolve formal namespaces. */
15833 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15834 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15835 gfc_resolve (sym
->formal_ns
);
15837 /* Make sure the formal namespace is present. */
15838 if (sym
->formal
&& !sym
->formal_ns
)
15840 gfc_formal_arglist
*formal
= sym
->formal
;
15841 while (formal
&& !formal
->sym
)
15842 formal
= formal
->next
;
15846 sym
->formal_ns
= formal
->sym
->ns
;
15847 if (sym
->ns
!= formal
->sym
->ns
)
15848 sym
->formal_ns
->refs
++;
15852 /* Check threadprivate restrictions. */
15853 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15854 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15855 && (!sym
->attr
.in_common
15856 && sym
->module
== NULL
15857 && (sym
->ns
->proc_name
== NULL
15858 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15859 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15861 /* Check omp declare target restrictions. */
15862 if (sym
->attr
.omp_declare_target
15863 && sym
->attr
.flavor
== FL_VARIABLE
15865 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15866 && (!sym
->attr
.in_common
15867 && sym
->module
== NULL
15868 && (sym
->ns
->proc_name
== NULL
15869 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15870 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15871 sym
->name
, &sym
->declared_at
);
15873 /* If we have come this far we can apply default-initializers, as
15874 described in 14.7.5, to those variables that have not already
15875 been assigned one. */
15876 if (sym
->ts
.type
== BT_DERIVED
15878 && !sym
->attr
.allocatable
15879 && !sym
->attr
.alloc_comp
)
15881 symbol_attribute
*a
= &sym
->attr
;
15883 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15884 && !a
->in_common
&& !a
->use_assoc
15886 && !((a
->function
|| a
->result
)
15888 || sym
->ts
.u
.derived
->attr
.alloc_comp
15889 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15890 && !(a
->function
&& sym
!= sym
->result
))
15891 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15892 apply_default_init (sym
);
15893 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15894 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15895 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15896 /* Mark the result symbol to be referenced, when it has allocatable
15898 sym
->result
->attr
.referenced
= 1;
15901 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15902 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15903 && !CLASS_DATA (sym
)->attr
.class_pointer
15904 && !CLASS_DATA (sym
)->attr
.allocatable
)
15905 apply_default_init (sym
);
15907 /* If this symbol has a type-spec, check it. */
15908 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15909 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15910 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15913 if (sym
->param_list
)
15918 /************* Resolve DATA statements *************/
15922 gfc_data_value
*vnode
;
15928 /* Advance the values structure to point to the next value in the data list. */
15931 next_data_value (void)
15933 while (mpz_cmp_ui (values
.left
, 0) == 0)
15936 if (values
.vnode
->next
== NULL
)
15939 values
.vnode
= values
.vnode
->next
;
15940 mpz_set (values
.left
, values
.vnode
->repeat
);
15948 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15954 ar_type mark
= AR_UNKNOWN
;
15956 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15962 if (!gfc_resolve_expr (var
->expr
))
15966 mpz_init_set_si (offset
, 0);
15969 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15970 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15971 e
= e
->value
.function
.actual
->expr
;
15973 if (e
->expr_type
!= EXPR_VARIABLE
)
15975 gfc_error ("Expecting definable entity near %L", where
);
15979 sym
= e
->symtree
->n
.sym
;
15981 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15983 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15984 sym
->name
, &sym
->declared_at
);
15988 if (e
->ref
== NULL
&& sym
->as
)
15990 gfc_error ("DATA array %qs at %L must be specified in a previous"
15991 " declaration", sym
->name
, where
);
15995 if (gfc_is_coindexed (e
))
15997 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
16002 has_pointer
= sym
->attr
.pointer
;
16004 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16006 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
16011 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
16013 gfc_error ("DATA element %qs at %L is a pointer and so must "
16014 "be a full array", sym
->name
, where
);
16018 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16020 gfc_error ("DATA object near %L has the pointer attribute "
16021 "and the corresponding DATA value is not a valid "
16022 "initial-data-target", where
);
16028 if (e
->rank
== 0 || has_pointer
)
16030 mpz_init_set_ui (size
, 1);
16037 /* Find the array section reference. */
16038 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16040 if (ref
->type
!= REF_ARRAY
)
16042 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16048 /* Set marks according to the reference pattern. */
16049 switch (ref
->u
.ar
.type
)
16057 /* Get the start position of array section. */
16058 gfc_get_section_index (ar
, section_index
, &offset
);
16063 gcc_unreachable ();
16066 if (!gfc_array_size (e
, &size
))
16068 gfc_error ("Nonconstant array section at %L in DATA statement",
16070 mpz_clear (offset
);
16077 while (mpz_cmp_ui (size
, 0) > 0)
16079 if (!next_data_value ())
16081 gfc_error ("DATA statement at %L has more variables than values",
16087 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16091 /* If we have more than one element left in the repeat count,
16092 and we have more than one element left in the target variable,
16093 then create a range assignment. */
16094 /* FIXME: Only done for full arrays for now, since array sections
16096 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16097 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16101 if (mpz_cmp (size
, values
.left
) >= 0)
16103 mpz_init_set (range
, values
.left
);
16104 mpz_sub (size
, size
, values
.left
);
16105 mpz_set_ui (values
.left
, 0);
16109 mpz_init_set (range
, size
);
16110 mpz_sub (values
.left
, values
.left
, size
);
16111 mpz_set_ui (size
, 0);
16114 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16117 mpz_add (offset
, offset
, range
);
16124 /* Assign initial value to symbol. */
16127 mpz_sub_ui (values
.left
, values
.left
, 1);
16128 mpz_sub_ui (size
, size
, 1);
16130 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16135 if (mark
== AR_FULL
)
16136 mpz_add_ui (offset
, offset
, 1);
16138 /* Modify the array section indexes and recalculate the offset
16139 for next element. */
16140 else if (mark
== AR_SECTION
)
16141 gfc_advance_section (section_index
, ar
, &offset
);
16145 if (mark
== AR_SECTION
)
16147 for (i
= 0; i
< ar
->dimen
; i
++)
16148 mpz_clear (section_index
[i
]);
16152 mpz_clear (offset
);
16158 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16160 /* Iterate over a list of elements in a DATA statement. */
16163 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16166 iterator_stack frame
;
16167 gfc_expr
*e
, *start
, *end
, *step
;
16168 bool retval
= true;
16170 mpz_init (frame
.value
);
16173 start
= gfc_copy_expr (var
->iter
.start
);
16174 end
= gfc_copy_expr (var
->iter
.end
);
16175 step
= gfc_copy_expr (var
->iter
.step
);
16177 if (!gfc_simplify_expr (start
, 1)
16178 || start
->expr_type
!= EXPR_CONSTANT
)
16180 gfc_error ("start of implied-do loop at %L could not be "
16181 "simplified to a constant value", &start
->where
);
16185 if (!gfc_simplify_expr (end
, 1)
16186 || end
->expr_type
!= EXPR_CONSTANT
)
16188 gfc_error ("end of implied-do loop at %L could not be "
16189 "simplified to a constant value", &start
->where
);
16193 if (!gfc_simplify_expr (step
, 1)
16194 || step
->expr_type
!= EXPR_CONSTANT
)
16196 gfc_error ("step of implied-do loop at %L could not be "
16197 "simplified to a constant value", &start
->where
);
16202 mpz_set (trip
, end
->value
.integer
);
16203 mpz_sub (trip
, trip
, start
->value
.integer
);
16204 mpz_add (trip
, trip
, step
->value
.integer
);
16206 mpz_div (trip
, trip
, step
->value
.integer
);
16208 mpz_set (frame
.value
, start
->value
.integer
);
16210 frame
.prev
= iter_stack
;
16211 frame
.variable
= var
->iter
.var
->symtree
;
16212 iter_stack
= &frame
;
16214 while (mpz_cmp_ui (trip
, 0) > 0)
16216 if (!traverse_data_var (var
->list
, where
))
16222 e
= gfc_copy_expr (var
->expr
);
16223 if (!gfc_simplify_expr (e
, 1))
16230 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16232 mpz_sub_ui (trip
, trip
, 1);
16236 mpz_clear (frame
.value
);
16239 gfc_free_expr (start
);
16240 gfc_free_expr (end
);
16241 gfc_free_expr (step
);
16243 iter_stack
= frame
.prev
;
16248 /* Type resolve variables in the variable list of a DATA statement. */
16251 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16255 for (; var
; var
= var
->next
)
16257 if (var
->expr
== NULL
)
16258 t
= traverse_data_list (var
, where
);
16260 t
= check_data_variable (var
, where
);
16270 /* Resolve the expressions and iterators associated with a data statement.
16271 This is separate from the assignment checking because data lists should
16272 only be resolved once. */
16275 resolve_data_variables (gfc_data_variable
*d
)
16277 for (; d
; d
= d
->next
)
16279 if (d
->list
== NULL
)
16281 if (!gfc_resolve_expr (d
->expr
))
16286 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16289 if (!resolve_data_variables (d
->list
))
16298 /* Resolve a single DATA statement. We implement this by storing a pointer to
16299 the value list into static variables, and then recursively traversing the
16300 variables list, expanding iterators and such. */
16303 resolve_data (gfc_data
*d
)
16306 if (!resolve_data_variables (d
->var
))
16309 values
.vnode
= d
->value
;
16310 if (d
->value
== NULL
)
16311 mpz_set_ui (values
.left
, 0);
16313 mpz_set (values
.left
, d
->value
->repeat
);
16315 if (!traverse_data_var (d
->var
, &d
->where
))
16318 /* At this point, we better not have any values left. */
16320 if (next_data_value ())
16321 gfc_error ("DATA statement at %L has more values than variables",
16326 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16327 accessed by host or use association, is a dummy argument to a pure function,
16328 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16329 is storage associated with any such variable, shall not be used in the
16330 following contexts: (clients of this function). */
16332 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16333 procedure. Returns zero if assignment is OK, nonzero if there is a
16336 gfc_impure_variable (gfc_symbol
*sym
)
16341 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16344 /* Check if the symbol's ns is inside the pure procedure. */
16345 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16349 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16353 proc
= sym
->ns
->proc_name
;
16354 if (sym
->attr
.dummy
16355 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16356 || proc
->attr
.function
))
16359 /* TODO: Sort out what can be storage associated, if anything, and include
16360 it here. In principle equivalences should be scanned but it does not
16361 seem to be possible to storage associate an impure variable this way. */
16366 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16367 current namespace is inside a pure procedure. */
16370 gfc_pure (gfc_symbol
*sym
)
16372 symbol_attribute attr
;
16377 /* Check if the current namespace or one of its parents
16378 belongs to a pure procedure. */
16379 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16381 sym
= ns
->proc_name
;
16385 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16393 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16397 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16398 checks if the current namespace is implicitly pure. Note that this
16399 function returns false for a PURE procedure. */
16402 gfc_implicit_pure (gfc_symbol
*sym
)
16408 /* Check if the current procedure is implicit_pure. Walk up
16409 the procedure list until we find a procedure. */
16410 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16412 sym
= ns
->proc_name
;
16416 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16421 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16422 && !sym
->attr
.pure
;
16427 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16433 /* Check if the current procedure is implicit_pure. Walk up
16434 the procedure list until we find a procedure. */
16435 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16437 sym
= ns
->proc_name
;
16441 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16446 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16447 sym
->attr
.implicit_pure
= 0;
16449 sym
->attr
.pure
= 0;
16453 /* Test whether the current procedure is elemental or not. */
16456 gfc_elemental (gfc_symbol
*sym
)
16458 symbol_attribute attr
;
16461 sym
= gfc_current_ns
->proc_name
;
16466 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16470 /* Warn about unused labels. */
16473 warn_unused_fortran_label (gfc_st_label
*label
)
16478 warn_unused_fortran_label (label
->left
);
16480 if (label
->defined
== ST_LABEL_UNKNOWN
)
16483 switch (label
->referenced
)
16485 case ST_LABEL_UNKNOWN
:
16486 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16487 label
->value
, &label
->where
);
16490 case ST_LABEL_BAD_TARGET
:
16491 gfc_warning (OPT_Wunused_label
,
16492 "Label %d at %L defined but cannot be used",
16493 label
->value
, &label
->where
);
16500 warn_unused_fortran_label (label
->right
);
16504 /* Returns the sequence type of a symbol or sequence. */
16507 sequence_type (gfc_typespec ts
)
16516 if (ts
.u
.derived
->components
== NULL
)
16517 return SEQ_NONDEFAULT
;
16519 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16520 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16521 if (sequence_type (c
->ts
) != result
)
16527 if (ts
.kind
!= gfc_default_character_kind
)
16528 return SEQ_NONDEFAULT
;
16530 return SEQ_CHARACTER
;
16533 if (ts
.kind
!= gfc_default_integer_kind
)
16534 return SEQ_NONDEFAULT
;
16536 return SEQ_NUMERIC
;
16539 if (!(ts
.kind
== gfc_default_real_kind
16540 || ts
.kind
== gfc_default_double_kind
))
16541 return SEQ_NONDEFAULT
;
16543 return SEQ_NUMERIC
;
16546 if (ts
.kind
!= gfc_default_complex_kind
)
16547 return SEQ_NONDEFAULT
;
16549 return SEQ_NUMERIC
;
16552 if (ts
.kind
!= gfc_default_logical_kind
)
16553 return SEQ_NONDEFAULT
;
16555 return SEQ_NUMERIC
;
16558 return SEQ_NONDEFAULT
;
16563 /* Resolve derived type EQUIVALENCE object. */
16566 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16568 gfc_component
*c
= derived
->components
;
16573 /* Shall not be an object of nonsequence derived type. */
16574 if (!derived
->attr
.sequence
)
16576 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16577 "attribute to be an EQUIVALENCE object", sym
->name
,
16582 /* Shall not have allocatable components. */
16583 if (derived
->attr
.alloc_comp
)
16585 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16586 "components to be an EQUIVALENCE object",sym
->name
,
16591 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16593 gfc_error ("Derived type variable %qs at %L with default "
16594 "initialization cannot be in EQUIVALENCE with a variable "
16595 "in COMMON", sym
->name
, &e
->where
);
16599 for (; c
; c
= c
->next
)
16601 if (gfc_bt_struct (c
->ts
.type
)
16602 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16605 /* Shall not be an object of sequence derived type containing a pointer
16606 in the structure. */
16607 if (c
->attr
.pointer
)
16609 gfc_error ("Derived type variable %qs at %L with pointer "
16610 "component(s) cannot be an EQUIVALENCE object",
16611 sym
->name
, &e
->where
);
16619 /* Resolve equivalence object.
16620 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16621 an allocatable array, an object of nonsequence derived type, an object of
16622 sequence derived type containing a pointer at any level of component
16623 selection, an automatic object, a function name, an entry name, a result
16624 name, a named constant, a structure component, or a subobject of any of
16625 the preceding objects. A substring shall not have length zero. A
16626 derived type shall not have components with default initialization nor
16627 shall two objects of an equivalence group be initialized.
16628 Either all or none of the objects shall have an protected attribute.
16629 The simple constraints are done in symbol.c(check_conflict) and the rest
16630 are implemented here. */
16633 resolve_equivalence (gfc_equiv
*eq
)
16636 gfc_symbol
*first_sym
;
16639 locus
*last_where
= NULL
;
16640 seq_type eq_type
, last_eq_type
;
16641 gfc_typespec
*last_ts
;
16642 int object
, cnt_protected
;
16645 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16647 first_sym
= eq
->expr
->symtree
->n
.sym
;
16651 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16655 e
->ts
= e
->symtree
->n
.sym
->ts
;
16656 /* match_varspec might not know yet if it is seeing
16657 array reference or substring reference, as it doesn't
16659 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16661 gfc_ref
*ref
= e
->ref
;
16662 sym
= e
->symtree
->n
.sym
;
16664 if (sym
->attr
.dimension
)
16666 ref
->u
.ar
.as
= sym
->as
;
16670 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16671 if (e
->ts
.type
== BT_CHARACTER
16673 && ref
->type
== REF_ARRAY
16674 && ref
->u
.ar
.dimen
== 1
16675 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16676 && ref
->u
.ar
.stride
[0] == NULL
)
16678 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16679 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16682 /* Optimize away the (:) reference. */
16683 if (start
== NULL
&& end
== NULL
)
16686 e
->ref
= ref
->next
;
16688 e
->ref
->next
= ref
->next
;
16693 ref
->type
= REF_SUBSTRING
;
16695 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16697 ref
->u
.ss
.start
= start
;
16698 if (end
== NULL
&& e
->ts
.u
.cl
)
16699 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16700 ref
->u
.ss
.end
= end
;
16701 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16708 /* Any further ref is an error. */
16711 gcc_assert (ref
->type
== REF_ARRAY
);
16712 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16718 if (!gfc_resolve_expr (e
))
16721 sym
= e
->symtree
->n
.sym
;
16723 if (sym
->attr
.is_protected
)
16725 if (cnt_protected
> 0 && cnt_protected
!= object
)
16727 gfc_error ("Either all or none of the objects in the "
16728 "EQUIVALENCE set at %L shall have the "
16729 "PROTECTED attribute",
16734 /* Shall not equivalence common block variables in a PURE procedure. */
16735 if (sym
->ns
->proc_name
16736 && sym
->ns
->proc_name
->attr
.pure
16737 && sym
->attr
.in_common
)
16739 /* Need to check for symbols that may have entered the pure
16740 procedure via a USE statement. */
16741 bool saw_sym
= false;
16742 if (sym
->ns
->use_stmts
)
16745 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16746 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16752 gfc_error ("COMMON block member %qs at %L cannot be an "
16753 "EQUIVALENCE object in the pure procedure %qs",
16754 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16758 /* Shall not be a named constant. */
16759 if (e
->expr_type
== EXPR_CONSTANT
)
16761 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16762 "object", sym
->name
, &e
->where
);
16766 if (e
->ts
.type
== BT_DERIVED
16767 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16770 /* Check that the types correspond correctly:
16772 A numeric sequence structure may be equivalenced to another sequence
16773 structure, an object of default integer type, default real type, double
16774 precision real type, default logical type such that components of the
16775 structure ultimately only become associated to objects of the same
16776 kind. A character sequence structure may be equivalenced to an object
16777 of default character kind or another character sequence structure.
16778 Other objects may be equivalenced only to objects of the same type and
16779 kind parameters. */
16781 /* Identical types are unconditionally OK. */
16782 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16783 goto identical_types
;
16785 last_eq_type
= sequence_type (*last_ts
);
16786 eq_type
= sequence_type (sym
->ts
);
16788 /* Since the pair of objects is not of the same type, mixed or
16789 non-default sequences can be rejected. */
16791 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16792 "statement at %L with different type objects";
16794 && last_eq_type
== SEQ_MIXED
16795 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16796 || (eq_type
== SEQ_MIXED
16797 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16800 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16801 "statement at %L with objects of different type";
16803 && last_eq_type
== SEQ_NONDEFAULT
16804 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16805 || (eq_type
== SEQ_NONDEFAULT
16806 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16809 msg
="Non-CHARACTER object %qs in default CHARACTER "
16810 "EQUIVALENCE statement at %L";
16811 if (last_eq_type
== SEQ_CHARACTER
16812 && eq_type
!= SEQ_CHARACTER
16813 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16816 msg
="Non-NUMERIC object %qs in default NUMERIC "
16817 "EQUIVALENCE statement at %L";
16818 if (last_eq_type
== SEQ_NUMERIC
16819 && eq_type
!= SEQ_NUMERIC
16820 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16825 last_where
= &e
->where
;
16830 /* Shall not be an automatic array. */
16831 if (e
->ref
->type
== REF_ARRAY
16832 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16834 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16835 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16842 /* Shall not be a structure component. */
16843 if (r
->type
== REF_COMPONENT
)
16845 gfc_error ("Structure component %qs at %L cannot be an "
16846 "EQUIVALENCE object",
16847 r
->u
.c
.component
->name
, &e
->where
);
16851 /* A substring shall not have length zero. */
16852 if (r
->type
== REF_SUBSTRING
)
16854 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16856 gfc_error ("Substring at %L has length zero",
16857 &r
->u
.ss
.start
->where
);
16867 /* Function called by resolve_fntype to flag other symbols used in the
16868 length type parameter specification of function results. */
16871 flag_fn_result_spec (gfc_expr
*expr
,
16873 int *f ATTRIBUTE_UNUSED
)
16878 if (expr
->expr_type
== EXPR_VARIABLE
)
16880 s
= expr
->symtree
->n
.sym
;
16881 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16887 gfc_error ("Self reference in character length expression "
16888 "for %qs at %L", sym
->name
, &expr
->where
);
16892 if (!s
->fn_result_spec
16893 && s
->attr
.flavor
== FL_PARAMETER
)
16895 /* Function contained in a module.... */
16896 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16899 s
->fn_result_spec
= 1;
16900 /* Make sure that this symbol is translated as a module
16902 st
= gfc_get_unique_symtree (ns
);
16906 /* ... which is use associated and called. */
16907 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16909 /* External function matched with an interface. */
16912 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16913 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16914 && s
->ns
->proc_name
->attr
.function
))
16915 s
->fn_result_spec
= 1;
16922 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16925 resolve_fntype (gfc_namespace
*ns
)
16927 gfc_entry_list
*el
;
16930 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16933 /* If there are any entries, ns->proc_name is the entry master
16934 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16936 sym
= ns
->entries
->sym
;
16938 sym
= ns
->proc_name
;
16939 if (sym
->result
== sym
16940 && sym
->ts
.type
== BT_UNKNOWN
16941 && !gfc_set_default_type (sym
, 0, NULL
)
16942 && !sym
->attr
.untyped
)
16944 gfc_error ("Function %qs at %L has no IMPLICIT type",
16945 sym
->name
, &sym
->declared_at
);
16946 sym
->attr
.untyped
= 1;
16949 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16950 && !sym
->attr
.contained
16951 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16952 && gfc_check_symbol_access (sym
))
16954 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16955 "%L of PRIVATE type %qs", sym
->name
,
16956 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16960 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16962 if (el
->sym
->result
== el
->sym
16963 && el
->sym
->ts
.type
== BT_UNKNOWN
16964 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16965 && !el
->sym
->attr
.untyped
)
16967 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16968 el
->sym
->name
, &el
->sym
->declared_at
);
16969 el
->sym
->attr
.untyped
= 1;
16973 if (sym
->ts
.type
== BT_CHARACTER
)
16974 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16978 /* 12.3.2.1.1 Defined operators. */
16981 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16983 gfc_formal_arglist
*formal
;
16985 if (!sym
->attr
.function
)
16987 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16988 sym
->name
, &where
);
16992 if (sym
->ts
.type
== BT_CHARACTER
16993 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16994 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16995 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16997 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16998 "character length", sym
->name
, &where
);
17002 formal
= gfc_sym_get_dummy_args (sym
);
17003 if (!formal
|| !formal
->sym
)
17005 gfc_error ("User operator procedure %qs at %L must have at least "
17006 "one argument", sym
->name
, &where
);
17010 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17012 gfc_error ("First argument of operator interface at %L must be "
17013 "INTENT(IN)", &where
);
17017 if (formal
->sym
->attr
.optional
)
17019 gfc_error ("First argument of operator interface at %L cannot be "
17020 "optional", &where
);
17024 formal
= formal
->next
;
17025 if (!formal
|| !formal
->sym
)
17028 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17030 gfc_error ("Second argument of operator interface at %L must be "
17031 "INTENT(IN)", &where
);
17035 if (formal
->sym
->attr
.optional
)
17037 gfc_error ("Second argument of operator interface at %L cannot be "
17038 "optional", &where
);
17044 gfc_error ("Operator interface at %L must have, at most, two "
17045 "arguments", &where
);
17053 gfc_resolve_uops (gfc_symtree
*symtree
)
17055 gfc_interface
*itr
;
17057 if (symtree
== NULL
)
17060 gfc_resolve_uops (symtree
->left
);
17061 gfc_resolve_uops (symtree
->right
);
17063 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17064 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17068 /* Examine all of the expressions associated with a program unit,
17069 assign types to all intermediate expressions, make sure that all
17070 assignments are to compatible types and figure out which names
17071 refer to which functions or subroutines. It doesn't check code
17072 block, which is handled by gfc_resolve_code. */
17075 resolve_types (gfc_namespace
*ns
)
17081 gfc_namespace
* old_ns
= gfc_current_ns
;
17083 if (ns
->types_resolved
)
17086 /* Check that all IMPLICIT types are ok. */
17087 if (!ns
->seen_implicit_none
)
17090 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17091 if (ns
->set_flag
[letter
]
17092 && !resolve_typespec_used (&ns
->default_type
[letter
],
17093 &ns
->implicit_loc
[letter
], NULL
))
17097 gfc_current_ns
= ns
;
17099 resolve_entries (ns
);
17101 resolve_common_vars (&ns
->blank_common
, false);
17102 resolve_common_blocks (ns
->common_root
);
17104 resolve_contained_functions (ns
);
17106 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17107 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17108 resolve_formal_arglist (ns
->proc_name
);
17110 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17112 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17113 resolve_charlen (cl
);
17115 gfc_traverse_ns (ns
, resolve_symbol
);
17117 resolve_fntype (ns
);
17119 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17121 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17122 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17123 "also be PURE", n
->proc_name
->name
,
17124 &n
->proc_name
->declared_at
);
17130 gfc_do_concurrent_flag
= 0;
17131 gfc_check_interfaces (ns
);
17133 gfc_traverse_ns (ns
, resolve_values
);
17135 if (ns
->save_all
|| !flag_automatic
)
17139 for (d
= ns
->data
; d
; d
= d
->next
)
17143 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17145 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17147 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17148 resolve_equivalence (eq
);
17150 /* Warn about unused labels. */
17151 if (warn_unused_label
)
17152 warn_unused_fortran_label (ns
->st_labels
);
17154 gfc_resolve_uops (ns
->uop_root
);
17156 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17158 gfc_resolve_omp_declare_simd (ns
);
17160 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17162 ns
->types_resolved
= 1;
17164 gfc_current_ns
= old_ns
;
17168 /* Call gfc_resolve_code recursively. */
17171 resolve_codes (gfc_namespace
*ns
)
17174 bitmap_obstack old_obstack
;
17176 if (ns
->resolved
== 1)
17179 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17182 gfc_current_ns
= ns
;
17184 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17185 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17188 /* Set to an out of range value. */
17189 current_entry_id
= -1;
17191 old_obstack
= labels_obstack
;
17192 bitmap_obstack_initialize (&labels_obstack
);
17194 gfc_resolve_oacc_declare (ns
);
17195 gfc_resolve_oacc_routines (ns
);
17196 gfc_resolve_omp_local_vars (ns
);
17197 gfc_resolve_code (ns
->code
, ns
);
17199 bitmap_obstack_release (&labels_obstack
);
17200 labels_obstack
= old_obstack
;
17204 /* This function is called after a complete program unit has been compiled.
17205 Its purpose is to examine all of the expressions associated with a program
17206 unit, assign types to all intermediate expressions, make sure that all
17207 assignments are to compatible types and figure out which names refer to
17208 which functions or subroutines. */
17211 gfc_resolve (gfc_namespace
*ns
)
17213 gfc_namespace
*old_ns
;
17214 code_stack
*old_cs_base
;
17215 struct gfc_omp_saved_state old_omp_state
;
17221 old_ns
= gfc_current_ns
;
17222 old_cs_base
= cs_base
;
17224 /* As gfc_resolve can be called during resolution of an OpenMP construct
17225 body, we should clear any state associated to it, so that say NS's
17226 DO loops are not interpreted as OpenMP loops. */
17227 if (!ns
->construct_entities
)
17228 gfc_omp_save_and_clear_state (&old_omp_state
);
17230 resolve_types (ns
);
17231 component_assignment_level
= 0;
17232 resolve_codes (ns
);
17234 gfc_current_ns
= old_ns
;
17235 cs_base
= old_cs_base
;
17238 gfc_run_passes (ns
);
17240 if (!ns
->construct_entities
)
17241 gfc_omp_restore_state (&old_omp_state
);