1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2019 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",
3904 /* Resolve an operator expression node. This can involve replacing the
3905 operation with a user defined function call. */
3908 resolve_operator (gfc_expr
*e
)
3910 gfc_expr
*op1
, *op2
;
3912 bool dual_locus_error
;
3915 /* Resolve all subnodes-- give them types. */
3917 switch (e
->value
.op
.op
)
3920 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3926 case INTRINSIC_UPLUS
:
3927 case INTRINSIC_UMINUS
:
3928 case INTRINSIC_PARENTHESES
:
3929 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3932 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3934 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3935 "unary operator %qs", &e
->value
.op
.op1
->where
,
3936 gfc_op2string (e
->value
.op
.op
));
3942 /* Typecheck the new node. */
3944 op1
= e
->value
.op
.op1
;
3945 op2
= e
->value
.op
.op2
;
3946 dual_locus_error
= false;
3948 /* op1 and op2 cannot both be BOZ. */
3949 if (op1
&& op1
->ts
.type
== BT_BOZ
3950 && op2
&& op2
->ts
.type
== BT_BOZ
)
3952 gfc_error ("Operands at %L and %L cannot appear as operands of "
3953 "binary operator %qs", &op1
->where
, &op2
->where
,
3954 gfc_op2string (e
->value
.op
.op
));
3958 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3959 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3961 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3965 switch (e
->value
.op
.op
)
3967 case INTRINSIC_UPLUS
:
3968 case INTRINSIC_UMINUS
:
3969 if (op1
->ts
.type
== BT_INTEGER
3970 || op1
->ts
.type
== BT_REAL
3971 || op1
->ts
.type
== BT_COMPLEX
)
3977 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3978 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
3981 case INTRINSIC_PLUS
:
3982 case INTRINSIC_MINUS
:
3983 case INTRINSIC_TIMES
:
3984 case INTRINSIC_DIVIDE
:
3985 case INTRINSIC_POWER
:
3986 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3988 gfc_type_convert_binary (e
, 1);
3992 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3994 _("Unexpected derived-type entities in binary intrinsic "
3995 "numeric operator %%<%s%%> at %%L"),
3996 gfc_op2string (e
->value
.op
.op
));
3999 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4000 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4001 gfc_typename (op2
));
4004 case INTRINSIC_CONCAT
:
4005 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4006 && op1
->ts
.kind
== op2
->ts
.kind
)
4008 e
->ts
.type
= BT_CHARACTER
;
4009 e
->ts
.kind
= op1
->ts
.kind
;
4014 _("Operands of string concatenation operator at %%L are %s/%s"),
4015 gfc_typename (op1
), gfc_typename (op2
));
4021 case INTRINSIC_NEQV
:
4022 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4024 e
->ts
.type
= BT_LOGICAL
;
4025 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4026 if (op1
->ts
.kind
< e
->ts
.kind
)
4027 gfc_convert_type (op1
, &e
->ts
, 2);
4028 else if (op2
->ts
.kind
< e
->ts
.kind
)
4029 gfc_convert_type (op2
, &e
->ts
, 2);
4031 if (flag_frontend_optimize
&&
4032 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4034 /* Warn about short-circuiting
4035 with impure function as second operand. */
4037 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4042 /* Logical ops on integers become bitwise ops with -fdec. */
4044 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4046 e
->ts
.type
= BT_INTEGER
;
4047 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4048 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4049 gfc_convert_type (op1
, &e
->ts
, 1);
4050 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4051 gfc_convert_type (op2
, &e
->ts
, 1);
4052 e
= logical_to_bitwise (e
);
4056 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4057 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4058 gfc_typename (op2
));
4063 /* Logical ops on integers become bitwise ops with -fdec. */
4064 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4066 e
->ts
.type
= BT_INTEGER
;
4067 e
->ts
.kind
= op1
->ts
.kind
;
4068 e
= logical_to_bitwise (e
);
4072 if (op1
->ts
.type
== BT_LOGICAL
)
4074 e
->ts
.type
= BT_LOGICAL
;
4075 e
->ts
.kind
= op1
->ts
.kind
;
4079 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4080 gfc_typename (op1
));
4084 case INTRINSIC_GT_OS
:
4086 case INTRINSIC_GE_OS
:
4088 case INTRINSIC_LT_OS
:
4090 case INTRINSIC_LE_OS
:
4091 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4093 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4100 case INTRINSIC_EQ_OS
:
4102 case INTRINSIC_NE_OS
:
4103 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4104 && op1
->ts
.kind
== op2
->ts
.kind
)
4106 e
->ts
.type
= BT_LOGICAL
;
4107 e
->ts
.kind
= gfc_default_logical_kind
;
4111 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4112 if (op1
->ts
.type
== BT_BOZ
)
4114 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4115 "an operand of a relational operator",
4119 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4122 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4126 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4127 if (op2
->ts
.type
== BT_BOZ
)
4129 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4130 "an operand of a relational operator",
4134 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4137 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4141 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4143 gfc_type_convert_binary (e
, 1);
4145 e
->ts
.type
= BT_LOGICAL
;
4146 e
->ts
.kind
= gfc_default_logical_kind
;
4148 if (warn_compare_reals
)
4150 gfc_intrinsic_op op
= e
->value
.op
.op
;
4152 /* Type conversion has made sure that the types of op1 and op2
4153 agree, so it is only necessary to check the first one. */
4154 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4155 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4156 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4160 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4161 msg
= "Equality comparison for %s at %L";
4163 msg
= "Inequality comparison for %s at %L";
4165 gfc_warning (OPT_Wcompare_reals
, msg
,
4166 gfc_typename (op1
), &op1
->where
);
4173 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4175 _("Logicals at %%L must be compared with %s instead of %s"),
4176 (e
->value
.op
.op
== INTRINSIC_EQ
4177 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4178 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4181 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4182 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4183 gfc_typename (op2
));
4187 case INTRINSIC_USER
:
4188 if (e
->value
.op
.uop
->op
== NULL
)
4190 const char *name
= e
->value
.op
.uop
->name
;
4191 const char *guessed
;
4192 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4194 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4197 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4199 else if (op2
== NULL
)
4200 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4201 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4204 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4205 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4206 gfc_typename (op2
));
4207 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4212 case INTRINSIC_PARENTHESES
:
4214 if (e
->ts
.type
== BT_CHARACTER
)
4215 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4219 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4222 /* Deal with arrayness of an operand through an operator. */
4224 switch (e
->value
.op
.op
)
4226 case INTRINSIC_PLUS
:
4227 case INTRINSIC_MINUS
:
4228 case INTRINSIC_TIMES
:
4229 case INTRINSIC_DIVIDE
:
4230 case INTRINSIC_POWER
:
4231 case INTRINSIC_CONCAT
:
4235 case INTRINSIC_NEQV
:
4237 case INTRINSIC_EQ_OS
:
4239 case INTRINSIC_NE_OS
:
4241 case INTRINSIC_GT_OS
:
4243 case INTRINSIC_GE_OS
:
4245 case INTRINSIC_LT_OS
:
4247 case INTRINSIC_LE_OS
:
4249 if (op1
->rank
== 0 && op2
->rank
== 0)
4252 if (op1
->rank
== 0 && op2
->rank
!= 0)
4254 e
->rank
= op2
->rank
;
4256 if (e
->shape
== NULL
)
4257 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4260 if (op1
->rank
!= 0 && op2
->rank
== 0)
4262 e
->rank
= op1
->rank
;
4264 if (e
->shape
== NULL
)
4265 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4268 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4270 if (op1
->rank
== op2
->rank
)
4272 e
->rank
= op1
->rank
;
4273 if (e
->shape
== NULL
)
4275 t
= compare_shapes (op1
, op2
);
4279 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4284 /* Allow higher level expressions to work. */
4287 /* Try user-defined operators, and otherwise throw an error. */
4288 dual_locus_error
= true;
4290 _("Inconsistent ranks for operator at %%L and %%L"));
4297 case INTRINSIC_PARENTHESES
:
4299 case INTRINSIC_UPLUS
:
4300 case INTRINSIC_UMINUS
:
4301 /* Simply copy arrayness attribute */
4302 e
->rank
= op1
->rank
;
4304 if (e
->shape
== NULL
)
4305 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4315 /* Attempt to simplify the expression. */
4318 t
= gfc_simplify_expr (e
, 0);
4319 /* Some calls do not succeed in simplification and return false
4320 even though there is no error; e.g. variable references to
4321 PARAMETER arrays. */
4322 if (!gfc_is_constant_expr (e
))
4330 match m
= gfc_extend_expr (e
);
4333 if (m
== MATCH_ERROR
)
4337 if (dual_locus_error
)
4338 gfc_error (msg
, &op1
->where
, &op2
->where
);
4340 gfc_error (msg
, &e
->where
);
4346 /************** Array resolution subroutines **************/
4349 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4351 /* Compare two integer expressions. */
4353 static compare_result
4354 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4358 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4359 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4362 /* If either of the types isn't INTEGER, we must have
4363 raised an error earlier. */
4365 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4368 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4378 /* Compare an integer expression with an integer. */
4380 static compare_result
4381 compare_bound_int (gfc_expr
*a
, int b
)
4385 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4388 if (a
->ts
.type
!= BT_INTEGER
)
4389 gfc_internal_error ("compare_bound_int(): Bad expression");
4391 i
= mpz_cmp_si (a
->value
.integer
, b
);
4401 /* Compare an integer expression with a mpz_t. */
4403 static compare_result
4404 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4408 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4411 if (a
->ts
.type
!= BT_INTEGER
)
4412 gfc_internal_error ("compare_bound_int(): Bad expression");
4414 i
= mpz_cmp (a
->value
.integer
, b
);
4424 /* Compute the last value of a sequence given by a triplet.
4425 Return 0 if it wasn't able to compute the last value, or if the
4426 sequence if empty, and 1 otherwise. */
4429 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4430 gfc_expr
*stride
, mpz_t last
)
4434 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4435 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4436 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4439 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4440 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4443 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4445 if (compare_bound (start
, end
) == CMP_GT
)
4447 mpz_set (last
, end
->value
.integer
);
4451 if (compare_bound_int (stride
, 0) == CMP_GT
)
4453 /* Stride is positive */
4454 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4459 /* Stride is negative */
4460 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4465 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4466 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4467 mpz_sub (last
, end
->value
.integer
, rem
);
4474 /* Compare a single dimension of an array reference to the array
4478 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4482 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4484 gcc_assert (ar
->stride
[i
] == NULL
);
4485 /* This implies [*] as [*:] and [*:3] are not possible. */
4486 if (ar
->start
[i
] == NULL
)
4488 gcc_assert (ar
->end
[i
] == NULL
);
4493 /* Given start, end and stride values, calculate the minimum and
4494 maximum referenced indexes. */
4496 switch (ar
->dimen_type
[i
])
4499 case DIMEN_THIS_IMAGE
:
4504 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4507 gfc_warning (0, "Array reference at %L is out of bounds "
4508 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4509 mpz_get_si (ar
->start
[i
]->value
.integer
),
4510 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4512 gfc_warning (0, "Array reference at %L is out of bounds "
4513 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (ar
->start
[i
]->value
.integer
),
4515 mpz_get_si (as
->lower
[i
]->value
.integer
),
4519 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4522 gfc_warning (0, "Array reference at %L is out of bounds "
4523 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4524 mpz_get_si (ar
->start
[i
]->value
.integer
),
4525 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4527 gfc_warning (0, "Array reference at %L is out of bounds "
4528 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4529 mpz_get_si (ar
->start
[i
]->value
.integer
),
4530 mpz_get_si (as
->upper
[i
]->value
.integer
),
4539 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4540 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4542 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4544 /* Check for zero stride, which is not allowed. */
4545 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4547 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4551 /* if start == len || (stride > 0 && start < len)
4552 || (stride < 0 && start > len),
4553 then the array section contains at least one element. In this
4554 case, there is an out-of-bounds access if
4555 (start < lower || start > upper). */
4556 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4557 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4558 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4559 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4560 && comp_start_end
== CMP_GT
))
4562 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4564 gfc_warning (0, "Lower array reference at %L is out of bounds "
4565 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4566 mpz_get_si (AR_START
->value
.integer
),
4567 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4570 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4572 gfc_warning (0, "Lower array reference at %L is out of bounds "
4573 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4574 mpz_get_si (AR_START
->value
.integer
),
4575 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4580 /* If we can compute the highest index of the array section,
4581 then it also has to be between lower and upper. */
4582 mpz_init (last_value
);
4583 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4586 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4588 gfc_warning (0, "Upper array reference at %L is out of bounds "
4589 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4590 mpz_get_si (last_value
),
4591 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4592 mpz_clear (last_value
);
4595 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4597 gfc_warning (0, "Upper array reference at %L is out of bounds "
4598 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4599 mpz_get_si (last_value
),
4600 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4601 mpz_clear (last_value
);
4605 mpz_clear (last_value
);
4613 gfc_internal_error ("check_dimension(): Bad array reference");
4620 /* Compare an array reference with an array specification. */
4623 compare_spec_to_ref (gfc_array_ref
*ar
)
4630 /* TODO: Full array sections are only allowed as actual parameters. */
4631 if (as
->type
== AS_ASSUMED_SIZE
4632 && (/*ar->type == AR_FULL
4633 ||*/ (ar
->type
== AR_SECTION
4634 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4636 gfc_error ("Rightmost upper bound of assumed size array section "
4637 "not specified at %L", &ar
->where
);
4641 if (ar
->type
== AR_FULL
)
4644 if (as
->rank
!= ar
->dimen
)
4646 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4647 &ar
->where
, ar
->dimen
, as
->rank
);
4651 /* ar->codimen == 0 is a local array. */
4652 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4654 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4655 &ar
->where
, ar
->codimen
, as
->corank
);
4659 for (i
= 0; i
< as
->rank
; i
++)
4660 if (!check_dimension (i
, ar
, as
))
4663 /* Local access has no coarray spec. */
4664 if (ar
->codimen
!= 0)
4665 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4667 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4668 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4670 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4671 i
+ 1 - as
->rank
, &ar
->where
);
4674 if (!check_dimension (i
, ar
, as
))
4682 /* Resolve one part of an array index. */
4685 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4686 int force_index_integer_kind
)
4693 if (!gfc_resolve_expr (index
))
4696 if (check_scalar
&& index
->rank
!= 0)
4698 gfc_error ("Array index at %L must be scalar", &index
->where
);
4702 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4704 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4705 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4709 if (index
->ts
.type
== BT_REAL
)
4710 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4714 if ((index
->ts
.kind
!= gfc_index_integer_kind
4715 && force_index_integer_kind
)
4716 || index
->ts
.type
!= BT_INTEGER
)
4719 ts
.type
= BT_INTEGER
;
4720 ts
.kind
= gfc_index_integer_kind
;
4722 gfc_convert_type_warn (index
, &ts
, 2, 0);
4728 /* Resolve one part of an array index. */
4731 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4733 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4736 /* Resolve a dim argument to an intrinsic function. */
4739 gfc_resolve_dim_arg (gfc_expr
*dim
)
4744 if (!gfc_resolve_expr (dim
))
4749 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4754 if (dim
->ts
.type
!= BT_INTEGER
)
4756 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4760 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4765 ts
.type
= BT_INTEGER
;
4766 ts
.kind
= gfc_index_integer_kind
;
4768 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4774 /* Given an expression that contains array references, update those array
4775 references to point to the right array specifications. While this is
4776 filled in during matching, this information is difficult to save and load
4777 in a module, so we take care of it here.
4779 The idea here is that the original array reference comes from the
4780 base symbol. We traverse the list of reference structures, setting
4781 the stored reference to references. Component references can
4782 provide an additional array specification. */
4785 find_array_spec (gfc_expr
*e
)
4790 bool class_as
= false;
4792 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4794 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4798 as
= e
->symtree
->n
.sym
->as
;
4800 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4805 gfc_internal_error ("find_array_spec(): Missing spec");
4812 c
= ref
->u
.c
.component
;
4813 if (c
->attr
.dimension
)
4815 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4816 gfc_internal_error ("find_array_spec(): unused as(1)");
4828 gfc_internal_error ("find_array_spec(): unused as(2)");
4832 /* Resolve an array reference. */
4835 resolve_array_ref (gfc_array_ref
*ar
)
4837 int i
, check_scalar
;
4840 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4842 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4844 /* Do not force gfc_index_integer_kind for the start. We can
4845 do fine with any integer kind. This avoids temporary arrays
4846 created for indexing with a vector. */
4847 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4849 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4851 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4856 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4860 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4864 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4865 if (e
->expr_type
== EXPR_VARIABLE
4866 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4867 ar
->start
[i
] = gfc_get_parentheses (e
);
4871 gfc_error ("Array index at %L is an array of rank %d",
4872 &ar
->c_where
[i
], e
->rank
);
4876 /* Fill in the upper bound, which may be lower than the
4877 specified one for something like a(2:10:5), which is
4878 identical to a(2:7:5). Only relevant for strides not equal
4879 to one. Don't try a division by zero. */
4880 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4881 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4882 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4883 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4887 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4889 if (ar
->end
[i
] == NULL
)
4892 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4894 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4896 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4897 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4899 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4910 if (ar
->type
== AR_FULL
)
4912 if (ar
->as
->rank
== 0)
4913 ar
->type
= AR_ELEMENT
;
4915 /* Make sure array is the same as array(:,:), this way
4916 we don't need to special case all the time. */
4917 ar
->dimen
= ar
->as
->rank
;
4918 for (i
= 0; i
< ar
->dimen
; i
++)
4920 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4922 gcc_assert (ar
->start
[i
] == NULL
);
4923 gcc_assert (ar
->end
[i
] == NULL
);
4924 gcc_assert (ar
->stride
[i
] == NULL
);
4928 /* If the reference type is unknown, figure out what kind it is. */
4930 if (ar
->type
== AR_UNKNOWN
)
4932 ar
->type
= AR_ELEMENT
;
4933 for (i
= 0; i
< ar
->dimen
; i
++)
4934 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4935 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4937 ar
->type
= AR_SECTION
;
4942 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4945 if (ar
->as
->corank
&& ar
->codimen
== 0)
4948 ar
->codimen
= ar
->as
->corank
;
4949 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4950 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4958 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4960 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4962 if (ref
->u
.ss
.start
!= NULL
)
4964 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4967 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4969 gfc_error ("Substring start index at %L must be of type INTEGER",
4970 &ref
->u
.ss
.start
->where
);
4974 if (ref
->u
.ss
.start
->rank
!= 0)
4976 gfc_error ("Substring start index at %L must be scalar",
4977 &ref
->u
.ss
.start
->where
);
4981 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4982 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4983 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4985 gfc_error ("Substring start index at %L is less than one",
4986 &ref
->u
.ss
.start
->where
);
4991 if (ref
->u
.ss
.end
!= NULL
)
4993 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4996 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4998 gfc_error ("Substring end index at %L must be of type INTEGER",
4999 &ref
->u
.ss
.end
->where
);
5003 if (ref
->u
.ss
.end
->rank
!= 0)
5005 gfc_error ("Substring end index at %L must be scalar",
5006 &ref
->u
.ss
.end
->where
);
5010 if (ref
->u
.ss
.length
!= NULL
5011 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5012 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5013 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5015 gfc_error ("Substring end index at %L exceeds the string length",
5016 &ref
->u
.ss
.start
->where
);
5020 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5021 gfc_integer_kinds
[k
].huge
) == CMP_GT
5022 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5023 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5025 gfc_error ("Substring end index at %L is too large",
5026 &ref
->u
.ss
.end
->where
);
5029 /* If the substring has the same length as the original
5030 variable, the reference itself can be deleted. */
5032 if (ref
->u
.ss
.length
!= NULL
5033 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5034 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5035 *equal_length
= true;
5042 /* This function supplies missing substring charlens. */
5045 gfc_resolve_substring_charlen (gfc_expr
*e
)
5048 gfc_expr
*start
, *end
;
5049 gfc_typespec
*ts
= NULL
;
5052 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5054 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5056 if (char_ref
->type
== REF_COMPONENT
)
5057 ts
= &char_ref
->u
.c
.component
->ts
;
5060 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5063 gcc_assert (char_ref
->next
== NULL
);
5067 if (e
->ts
.u
.cl
->length
)
5068 gfc_free_expr (e
->ts
.u
.cl
->length
);
5069 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5073 e
->ts
.type
= BT_CHARACTER
;
5074 e
->ts
.kind
= gfc_default_character_kind
;
5077 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5079 if (char_ref
->u
.ss
.start
)
5080 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5082 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5084 if (char_ref
->u
.ss
.end
)
5085 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5086 else if (e
->expr_type
== EXPR_VARIABLE
)
5089 ts
= &e
->symtree
->n
.sym
->ts
;
5090 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5097 gfc_free_expr (start
);
5098 gfc_free_expr (end
);
5102 /* Length = (end - start + 1).
5103 Check first whether it has a constant length. */
5104 if (gfc_dep_difference (end
, start
, &diff
))
5106 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5109 mpz_add_ui (len
->value
.integer
, diff
, 1);
5111 e
->ts
.u
.cl
->length
= len
;
5112 /* The check for length < 0 is handled below */
5116 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5117 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5118 gfc_get_int_expr (gfc_charlen_int_kind
,
5122 /* F2008, 6.4.1: Both the starting point and the ending point shall
5123 be within the range 1, 2, ..., n unless the starting point exceeds
5124 the ending point, in which case the substring has length zero. */
5126 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5127 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5129 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5130 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5132 /* Make sure that the length is simplified. */
5133 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5134 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5138 /* Resolve subtype references. */
5141 resolve_ref (gfc_expr
*expr
)
5143 int current_part_dimension
, n_components
, seen_part_dimension
;
5144 gfc_ref
*ref
, **prev
;
5147 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5148 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5150 find_array_spec (expr
);
5154 for (prev
= &expr
->ref
; *prev
!= NULL
;
5155 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5156 switch ((*prev
)->type
)
5159 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5168 equal_length
= false;
5169 if (!resolve_substring (*prev
, &equal_length
))
5172 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5174 /* Remove the reference and move the charlen, if any. */
5178 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5179 ref
->u
.ss
.length
= NULL
;
5180 gfc_free_ref_list (ref
);
5185 /* Check constraints on part references. */
5187 current_part_dimension
= 0;
5188 seen_part_dimension
= 0;
5191 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5196 switch (ref
->u
.ar
.type
)
5199 /* Coarray scalar. */
5200 if (ref
->u
.ar
.as
->rank
== 0)
5202 current_part_dimension
= 0;
5207 current_part_dimension
= 1;
5211 current_part_dimension
= 0;
5215 gfc_internal_error ("resolve_ref(): Bad array reference");
5221 if (current_part_dimension
|| seen_part_dimension
)
5224 if (ref
->u
.c
.component
->attr
.pointer
5225 || ref
->u
.c
.component
->attr
.proc_pointer
5226 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5227 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5229 gfc_error ("Component to the right of a part reference "
5230 "with nonzero rank must not have the POINTER "
5231 "attribute at %L", &expr
->where
);
5234 else if (ref
->u
.c
.component
->attr
.allocatable
5235 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5236 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5239 gfc_error ("Component to the right of a part reference "
5240 "with nonzero rank must not have the ALLOCATABLE "
5241 "attribute at %L", &expr
->where
);
5254 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5255 || ref
->next
== NULL
)
5256 && current_part_dimension
5257 && seen_part_dimension
)
5259 gfc_error ("Two or more part references with nonzero rank must "
5260 "not be specified at %L", &expr
->where
);
5264 if (ref
->type
== REF_COMPONENT
)
5266 if (current_part_dimension
)
5267 seen_part_dimension
= 1;
5269 /* reset to make sure */
5270 current_part_dimension
= 0;
5278 /* Given an expression, determine its shape. This is easier than it sounds.
5279 Leaves the shape array NULL if it is not possible to determine the shape. */
5282 expression_shape (gfc_expr
*e
)
5284 mpz_t array
[GFC_MAX_DIMENSIONS
];
5287 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5290 for (i
= 0; i
< e
->rank
; i
++)
5291 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5294 e
->shape
= gfc_get_shape (e
->rank
);
5296 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5301 for (i
--; i
>= 0; i
--)
5302 mpz_clear (array
[i
]);
5306 /* Given a variable expression node, compute the rank of the expression by
5307 examining the base symbol and any reference structures it may have. */
5310 expression_rank (gfc_expr
*e
)
5315 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5316 could lead to serious confusion... */
5317 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5321 if (e
->expr_type
== EXPR_ARRAY
)
5323 /* Constructors can have a rank different from one via RESHAPE(). */
5325 if (e
->symtree
== NULL
)
5331 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5332 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5338 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5340 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5341 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5342 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5344 if (ref
->type
!= REF_ARRAY
)
5347 if (ref
->u
.ar
.type
== AR_FULL
)
5349 rank
= ref
->u
.ar
.as
->rank
;
5353 if (ref
->u
.ar
.type
== AR_SECTION
)
5355 /* Figure out the rank of the section. */
5357 gfc_internal_error ("expression_rank(): Two array specs");
5359 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5360 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5361 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5371 expression_shape (e
);
5376 add_caf_get_intrinsic (gfc_expr
*e
)
5378 gfc_expr
*wrapper
, *tmp_expr
;
5382 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5383 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5388 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5389 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5392 tmp_expr
= XCNEW (gfc_expr
);
5394 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5395 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5396 wrapper
->ts
= e
->ts
;
5397 wrapper
->rank
= e
->rank
;
5399 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5406 remove_caf_get_intrinsic (gfc_expr
*e
)
5408 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5409 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5410 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5411 e
->value
.function
.actual
->expr
= NULL
;
5412 gfc_free_actual_arglist (e
->value
.function
.actual
);
5413 gfc_free_shape (&e
->shape
, e
->rank
);
5419 /* Resolve a variable expression. */
5422 resolve_variable (gfc_expr
*e
)
5429 if (e
->symtree
== NULL
)
5431 sym
= e
->symtree
->n
.sym
;
5433 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5434 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5435 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5437 if (!actual_arg
|| inquiry_argument
)
5439 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5440 "be used as actual argument", sym
->name
, &e
->where
);
5444 /* TS 29113, 407b. */
5445 else if (e
->ts
.type
== BT_ASSUMED
)
5449 gfc_error ("Assumed-type variable %s at %L may only be used "
5450 "as actual argument", sym
->name
, &e
->where
);
5453 else if (inquiry_argument
&& !first_actual_arg
)
5455 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5456 for all inquiry functions in resolve_function; the reason is
5457 that the function-name resolution happens too late in that
5459 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5460 "an inquiry function shall be the first argument",
5461 sym
->name
, &e
->where
);
5465 /* TS 29113, C535b. */
5466 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5467 && CLASS_DATA (sym
)->as
5468 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5469 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5470 && sym
->as
->type
== AS_ASSUMED_RANK
))
5471 && !sym
->attr
.select_rank_temporary
)
5474 && !(cs_base
&& cs_base
->current
5475 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5477 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5478 "actual argument", sym
->name
, &e
->where
);
5481 else if (inquiry_argument
&& !first_actual_arg
)
5483 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5484 for all inquiry functions in resolve_function; the reason is
5485 that the function-name resolution happens too late in that
5487 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5488 "to an inquiry function shall be the first argument",
5489 sym
->name
, &e
->where
);
5494 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5495 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5496 && e
->ref
->next
== NULL
))
5498 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5499 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5502 /* TS 29113, 407b. */
5503 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5504 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5505 && e
->ref
->next
== NULL
))
5507 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5508 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5512 /* TS 29113, C535b. */
5513 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5514 && CLASS_DATA (sym
)->as
5515 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5516 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5517 && sym
->as
->type
== AS_ASSUMED_RANK
))
5519 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5520 && e
->ref
->next
== NULL
))
5522 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5523 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5527 /* For variables that are used in an associate (target => object) where
5528 the object's basetype is array valued while the target is scalar,
5529 the ts' type of the component refs is still array valued, which
5530 can't be translated that way. */
5531 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5532 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5533 && CLASS_DATA (sym
->assoc
->target
)->as
)
5535 gfc_ref
*ref
= e
->ref
;
5541 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5542 /* Stop the loop. */
5552 /* If this is an associate-name, it may be parsed with an array reference
5553 in error even though the target is scalar. Fail directly in this case.
5554 TODO Understand why class scalar expressions must be excluded. */
5555 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5557 if (sym
->ts
.type
== BT_CLASS
)
5558 gfc_fix_class_refs (e
);
5559 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5561 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5563 /* This can happen because the parser did not detect that the
5564 associate name is an array and the expression had no array
5566 gfc_ref
*ref
= gfc_get_ref ();
5567 ref
->type
= REF_ARRAY
;
5568 ref
->u
.ar
= *gfc_get_array_ref();
5569 ref
->u
.ar
.type
= AR_FULL
;
5572 ref
->u
.ar
.as
= sym
->as
;
5573 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5581 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5582 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5584 /* On the other hand, the parser may not have known this is an array;
5585 in this case, we have to add a FULL reference. */
5586 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5588 e
->ref
= gfc_get_ref ();
5589 e
->ref
->type
= REF_ARRAY
;
5590 e
->ref
->u
.ar
.type
= AR_FULL
;
5591 e
->ref
->u
.ar
.dimen
= 0;
5594 /* Like above, but for class types, where the checking whether an array
5595 ref is present is more complicated. Furthermore make sure not to add
5596 the full array ref to _vptr or _len refs. */
5597 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5598 && CLASS_DATA (sym
)->attr
.dimension
5599 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5601 gfc_ref
*ref
, *newref
;
5603 newref
= gfc_get_ref ();
5604 newref
->type
= REF_ARRAY
;
5605 newref
->u
.ar
.type
= AR_FULL
;
5606 newref
->u
.ar
.dimen
= 0;
5607 /* Because this is an associate var and the first ref either is a ref to
5608 the _data component or not, no traversal of the ref chain is
5609 needed. The array ref needs to be inserted after the _data ref,
5610 or when that is not present, which may happend for polymorphic
5611 types, then at the first position. */
5615 else if (ref
->type
== REF_COMPONENT
5616 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5618 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5620 newref
->next
= ref
->next
;
5624 /* Array ref present already. */
5625 gfc_free_ref_list (newref
);
5627 else if (ref
->type
== REF_ARRAY
)
5628 /* Array ref present already. */
5629 gfc_free_ref_list (newref
);
5637 if (e
->ref
&& !resolve_ref (e
))
5640 if (sym
->attr
.flavor
== FL_PROCEDURE
5641 && (!sym
->attr
.function
5642 || (sym
->attr
.function
&& sym
->result
5643 && sym
->result
->attr
.proc_pointer
5644 && !sym
->result
->attr
.function
)))
5646 e
->ts
.type
= BT_PROCEDURE
;
5647 goto resolve_procedure
;
5650 if (sym
->ts
.type
!= BT_UNKNOWN
)
5651 gfc_variable_attr (e
, &e
->ts
);
5652 else if (sym
->attr
.flavor
== FL_PROCEDURE
5653 && sym
->attr
.function
&& sym
->result
5654 && sym
->result
->ts
.type
!= BT_UNKNOWN
5655 && sym
->result
->attr
.proc_pointer
)
5656 e
->ts
= sym
->result
->ts
;
5659 /* Must be a simple variable reference. */
5660 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5665 if (check_assumed_size_reference (sym
, e
))
5668 /* Deal with forward references to entries during gfc_resolve_code, to
5669 satisfy, at least partially, 12.5.2.5. */
5670 if (gfc_current_ns
->entries
5671 && current_entry_id
== sym
->entry_id
5674 && cs_base
->current
->op
!= EXEC_ENTRY
)
5676 gfc_entry_list
*entry
;
5677 gfc_formal_arglist
*formal
;
5679 bool seen
, saved_specification_expr
;
5681 /* If the symbol is a dummy... */
5682 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5684 entry
= gfc_current_ns
->entries
;
5687 /* ...test if the symbol is a parameter of previous entries. */
5688 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5689 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5691 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5698 /* If it has not been seen as a dummy, this is an error. */
5701 if (specification_expr
)
5702 gfc_error ("Variable %qs, used in a specification expression"
5703 ", is referenced at %L before the ENTRY statement "
5704 "in which it is a parameter",
5705 sym
->name
, &cs_base
->current
->loc
);
5707 gfc_error ("Variable %qs is used at %L before the ENTRY "
5708 "statement in which it is a parameter",
5709 sym
->name
, &cs_base
->current
->loc
);
5714 /* Now do the same check on the specification expressions. */
5715 saved_specification_expr
= specification_expr
;
5716 specification_expr
= true;
5717 if (sym
->ts
.type
== BT_CHARACTER
5718 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5722 for (n
= 0; n
< sym
->as
->rank
; n
++)
5724 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5726 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5729 specification_expr
= saved_specification_expr
;
5732 /* Update the symbol's entry level. */
5733 sym
->entry_id
= current_entry_id
+ 1;
5736 /* If a symbol has been host_associated mark it. This is used latter,
5737 to identify if aliasing is possible via host association. */
5738 if (sym
->attr
.flavor
== FL_VARIABLE
5739 && gfc_current_ns
->parent
5740 && (gfc_current_ns
->parent
== sym
->ns
5741 || (gfc_current_ns
->parent
->parent
5742 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5743 sym
->attr
.host_assoc
= 1;
5745 if (gfc_current_ns
->proc_name
5746 && sym
->attr
.dimension
5747 && (sym
->ns
!= gfc_current_ns
5748 || sym
->attr
.use_assoc
5749 || sym
->attr
.in_common
))
5750 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5753 if (t
&& !resolve_procedure_expression (e
))
5756 /* F2008, C617 and C1229. */
5757 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5758 && gfc_is_coindexed (e
))
5760 gfc_ref
*ref
, *ref2
= NULL
;
5762 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5764 if (ref
->type
== REF_COMPONENT
)
5766 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5770 for ( ; ref
; ref
= ref
->next
)
5771 if (ref
->type
== REF_COMPONENT
)
5774 /* Expression itself is not coindexed object. */
5775 if (ref
&& e
->ts
.type
== BT_CLASS
)
5777 gfc_error ("Polymorphic subobject of coindexed object at %L",
5782 /* Expression itself is coindexed object. */
5786 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5787 for ( ; c
; c
= c
->next
)
5788 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5790 gfc_error ("Coindexed object with polymorphic allocatable "
5791 "subcomponent at %L", &e
->where
);
5799 expression_rank (e
);
5801 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5802 add_caf_get_intrinsic (e
);
5804 /* Simplify cases where access to a parameter array results in a
5805 single constant. Suppress errors since those will have been
5806 issued before, as warnings. */
5807 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5809 gfc_push_suppress_errors ();
5810 gfc_simplify_expr (e
, 1);
5811 gfc_pop_suppress_errors ();
5818 /* Checks to see that the correct symbol has been host associated.
5819 The only situation where this arises is that in which a twice
5820 contained function is parsed after the host association is made.
5821 Therefore, on detecting this, change the symbol in the expression
5822 and convert the array reference into an actual arglist if the old
5823 symbol is a variable. */
5825 check_host_association (gfc_expr
*e
)
5827 gfc_symbol
*sym
, *old_sym
;
5831 gfc_actual_arglist
*arg
, *tail
= NULL
;
5832 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5834 /* If the expression is the result of substitution in
5835 interface.c(gfc_extend_expr) because there is no way in
5836 which the host association can be wrong. */
5837 if (e
->symtree
== NULL
5838 || e
->symtree
->n
.sym
== NULL
5839 || e
->user_operator
)
5842 old_sym
= e
->symtree
->n
.sym
;
5844 if (gfc_current_ns
->parent
5845 && old_sym
->ns
!= gfc_current_ns
)
5847 /* Use the 'USE' name so that renamed module symbols are
5848 correctly handled. */
5849 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5851 if (sym
&& old_sym
!= sym
5852 && sym
->ts
.type
== old_sym
->ts
.type
5853 && sym
->attr
.flavor
== FL_PROCEDURE
5854 && sym
->attr
.contained
)
5856 /* Clear the shape, since it might not be valid. */
5857 gfc_free_shape (&e
->shape
, e
->rank
);
5859 /* Give the expression the right symtree! */
5860 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5861 gcc_assert (st
!= NULL
);
5863 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5864 || e
->expr_type
== EXPR_FUNCTION
)
5866 /* Original was function so point to the new symbol, since
5867 the actual argument list is already attached to the
5869 e
->value
.function
.esym
= NULL
;
5874 /* Original was variable so convert array references into
5875 an actual arglist. This does not need any checking now
5876 since resolve_function will take care of it. */
5877 e
->value
.function
.actual
= NULL
;
5878 e
->expr_type
= EXPR_FUNCTION
;
5881 /* Ambiguity will not arise if the array reference is not
5882 the last reference. */
5883 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5884 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5887 gcc_assert (ref
->type
== REF_ARRAY
);
5889 /* Grab the start expressions from the array ref and
5890 copy them into actual arguments. */
5891 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5893 arg
= gfc_get_actual_arglist ();
5894 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5895 if (e
->value
.function
.actual
== NULL
)
5896 tail
= e
->value
.function
.actual
= arg
;
5904 /* Dump the reference list and set the rank. */
5905 gfc_free_ref_list (e
->ref
);
5907 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5910 gfc_resolve_expr (e
);
5914 /* This might have changed! */
5915 return e
->expr_type
== EXPR_FUNCTION
;
5920 gfc_resolve_character_operator (gfc_expr
*e
)
5922 gfc_expr
*op1
= e
->value
.op
.op1
;
5923 gfc_expr
*op2
= e
->value
.op
.op2
;
5924 gfc_expr
*e1
= NULL
;
5925 gfc_expr
*e2
= NULL
;
5927 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5929 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5930 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5931 else if (op1
->expr_type
== EXPR_CONSTANT
)
5932 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5933 op1
->value
.character
.length
);
5935 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5936 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5937 else if (op2
->expr_type
== EXPR_CONSTANT
)
5938 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5939 op2
->value
.character
.length
);
5941 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5951 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5952 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5953 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5954 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5955 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5961 /* Ensure that an character expression has a charlen and, if possible, a
5962 length expression. */
5965 fixup_charlen (gfc_expr
*e
)
5967 /* The cases fall through so that changes in expression type and the need
5968 for multiple fixes are picked up. In all circumstances, a charlen should
5969 be available for the middle end to hang a backend_decl on. */
5970 switch (e
->expr_type
)
5973 gfc_resolve_character_operator (e
);
5977 if (e
->expr_type
== EXPR_ARRAY
)
5978 gfc_resolve_character_array_constructor (e
);
5981 case EXPR_SUBSTRING
:
5982 if (!e
->ts
.u
.cl
&& e
->ref
)
5983 gfc_resolve_substring_charlen (e
);
5988 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5995 /* Update an actual argument to include the passed-object for type-bound
5996 procedures at the right position. */
5998 static gfc_actual_arglist
*
5999 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6002 gcc_assert (argpos
> 0);
6006 gfc_actual_arglist
* result
;
6008 result
= gfc_get_actual_arglist ();
6012 result
->name
= name
;
6018 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6020 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6025 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6028 extract_compcall_passed_object (gfc_expr
* e
)
6032 if (e
->expr_type
== EXPR_UNKNOWN
)
6034 gfc_error ("Error in typebound call at %L",
6039 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6041 if (e
->value
.compcall
.base_object
)
6042 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6045 po
= gfc_get_expr ();
6046 po
->expr_type
= EXPR_VARIABLE
;
6047 po
->symtree
= e
->symtree
;
6048 po
->ref
= gfc_copy_ref (e
->ref
);
6049 po
->where
= e
->where
;
6052 if (!gfc_resolve_expr (po
))
6059 /* Update the arglist of an EXPR_COMPCALL expression to include the
6063 update_compcall_arglist (gfc_expr
* e
)
6066 gfc_typebound_proc
* tbp
;
6068 tbp
= e
->value
.compcall
.tbp
;
6073 po
= extract_compcall_passed_object (e
);
6077 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6083 if (tbp
->pass_arg_num
<= 0)
6086 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6094 /* Extract the passed object from a PPC call (a copy of it). */
6097 extract_ppc_passed_object (gfc_expr
*e
)
6102 po
= gfc_get_expr ();
6103 po
->expr_type
= EXPR_VARIABLE
;
6104 po
->symtree
= e
->symtree
;
6105 po
->ref
= gfc_copy_ref (e
->ref
);
6106 po
->where
= e
->where
;
6108 /* Remove PPC reference. */
6110 while ((*ref
)->next
)
6111 ref
= &(*ref
)->next
;
6112 gfc_free_ref_list (*ref
);
6115 if (!gfc_resolve_expr (po
))
6122 /* Update the actual arglist of a procedure pointer component to include the
6126 update_ppc_arglist (gfc_expr
* e
)
6130 gfc_typebound_proc
* tb
;
6132 ppc
= gfc_get_proc_ptr_comp (e
);
6140 else if (tb
->nopass
)
6143 po
= extract_ppc_passed_object (e
);
6150 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6155 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6157 gfc_error ("Base object for procedure-pointer component call at %L is of"
6158 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6162 gcc_assert (tb
->pass_arg_num
> 0);
6163 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6171 /* Check that the object a TBP is called on is valid, i.e. it must not be
6172 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6175 check_typebound_baseobject (gfc_expr
* e
)
6178 bool return_value
= false;
6180 base
= extract_compcall_passed_object (e
);
6184 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6186 gfc_error ("Error in typebound call at %L", &e
->where
);
6190 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6194 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6196 gfc_error ("Base object for type-bound procedure call at %L is of"
6197 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6201 /* F08:C1230. If the procedure called is NOPASS,
6202 the base object must be scalar. */
6203 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6205 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6206 " be scalar", &e
->where
);
6210 return_value
= true;
6213 gfc_free_expr (base
);
6214 return return_value
;
6218 /* Resolve a call to a type-bound procedure, either function or subroutine,
6219 statically from the data in an EXPR_COMPCALL expression. The adapted
6220 arglist and the target-procedure symtree are returned. */
6223 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6224 gfc_actual_arglist
** actual
)
6226 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6227 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6229 /* Update the actual arglist for PASS. */
6230 if (!update_compcall_arglist (e
))
6233 *actual
= e
->value
.compcall
.actual
;
6234 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6236 gfc_free_ref_list (e
->ref
);
6238 e
->value
.compcall
.actual
= NULL
;
6240 /* If we find a deferred typebound procedure, check for derived types
6241 that an overriding typebound procedure has not been missed. */
6242 if (e
->value
.compcall
.name
6243 && !e
->value
.compcall
.tbp
->non_overridable
6244 && e
->value
.compcall
.base_object
6245 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6248 gfc_symbol
*derived
;
6250 /* Use the derived type of the base_object. */
6251 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6254 /* If necessary, go through the inheritance chain. */
6255 while (!st
&& derived
)
6257 /* Look for the typebound procedure 'name'. */
6258 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6259 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6260 e
->value
.compcall
.name
);
6262 derived
= gfc_get_derived_super_type (derived
);
6265 /* Now find the specific name in the derived type namespace. */
6266 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6267 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6268 derived
->ns
, 1, &st
);
6276 /* Get the ultimate declared type from an expression. In addition,
6277 return the last class/derived type reference and the copy of the
6278 reference list. If check_types is set true, derived types are
6279 identified as well as class references. */
6281 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6282 gfc_expr
*e
, bool check_types
)
6284 gfc_symbol
*declared
;
6291 *new_ref
= gfc_copy_ref (e
->ref
);
6293 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6295 if (ref
->type
!= REF_COMPONENT
)
6298 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6299 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6300 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6302 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6308 if (declared
== NULL
)
6309 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6315 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6316 which of the specific bindings (if any) matches the arglist and transform
6317 the expression into a call of that binding. */
6320 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6322 gfc_typebound_proc
* genproc
;
6323 const char* genname
;
6325 gfc_symbol
*derived
;
6327 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6328 genname
= e
->value
.compcall
.name
;
6329 genproc
= e
->value
.compcall
.tbp
;
6331 if (!genproc
->is_generic
)
6334 /* Try the bindings on this type and in the inheritance hierarchy. */
6335 for (; genproc
; genproc
= genproc
->overridden
)
6339 gcc_assert (genproc
->is_generic
);
6340 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6343 gfc_actual_arglist
* args
;
6346 gcc_assert (g
->specific
);
6348 if (g
->specific
->error
)
6351 target
= g
->specific
->u
.specific
->n
.sym
;
6353 /* Get the right arglist by handling PASS/NOPASS. */
6354 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6355 if (!g
->specific
->nopass
)
6358 po
= extract_compcall_passed_object (e
);
6361 gfc_free_actual_arglist (args
);
6365 gcc_assert (g
->specific
->pass_arg_num
> 0);
6366 gcc_assert (!g
->specific
->error
);
6367 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6368 g
->specific
->pass_arg
);
6370 resolve_actual_arglist (args
, target
->attr
.proc
,
6371 is_external_proc (target
)
6372 && gfc_sym_get_dummy_args (target
) == NULL
);
6374 /* Check if this arglist matches the formal. */
6375 matches
= gfc_arglist_matches_symbol (&args
, target
);
6377 /* Clean up and break out of the loop if we've found it. */
6378 gfc_free_actual_arglist (args
);
6381 e
->value
.compcall
.tbp
= g
->specific
;
6382 genname
= g
->specific_st
->name
;
6383 /* Pass along the name for CLASS methods, where the vtab
6384 procedure pointer component has to be referenced. */
6392 /* Nothing matching found! */
6393 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6394 " %qs at %L", genname
, &e
->where
);
6398 /* Make sure that we have the right specific instance for the name. */
6399 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6401 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6403 e
->value
.compcall
.tbp
= st
->n
.tb
;
6409 /* Resolve a call to a type-bound subroutine. */
6412 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6414 gfc_actual_arglist
* newactual
;
6415 gfc_symtree
* target
;
6417 /* Check that's really a SUBROUTINE. */
6418 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6420 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6421 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6422 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6423 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6424 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6427 gfc_error ("%qs at %L should be a SUBROUTINE",
6428 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6433 if (!check_typebound_baseobject (c
->expr1
))
6436 /* Pass along the name for CLASS methods, where the vtab
6437 procedure pointer component has to be referenced. */
6439 *name
= c
->expr1
->value
.compcall
.name
;
6441 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6444 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6446 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6448 /* Transform into an ordinary EXEC_CALL for now. */
6450 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6453 c
->ext
.actual
= newactual
;
6454 c
->symtree
= target
;
6455 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6457 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6459 gfc_free_expr (c
->expr1
);
6460 c
->expr1
= gfc_get_expr ();
6461 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6462 c
->expr1
->symtree
= target
;
6463 c
->expr1
->where
= c
->loc
;
6465 return resolve_call (c
);
6469 /* Resolve a component-call expression. */
6471 resolve_compcall (gfc_expr
* e
, const char **name
)
6473 gfc_actual_arglist
* newactual
;
6474 gfc_symtree
* target
;
6476 /* Check that's really a FUNCTION. */
6477 if (!e
->value
.compcall
.tbp
->function
)
6479 gfc_error ("%qs at %L should be a FUNCTION",
6480 e
->value
.compcall
.name
, &e
->where
);
6485 /* These must not be assign-calls! */
6486 gcc_assert (!e
->value
.compcall
.assign
);
6488 if (!check_typebound_baseobject (e
))
6491 /* Pass along the name for CLASS methods, where the vtab
6492 procedure pointer component has to be referenced. */
6494 *name
= e
->value
.compcall
.name
;
6496 if (!resolve_typebound_generic_call (e
, name
))
6498 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6500 /* Take the rank from the function's symbol. */
6501 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6502 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6504 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6505 arglist to the TBP's binding target. */
6507 if (!resolve_typebound_static (e
, &target
, &newactual
))
6510 e
->value
.function
.actual
= newactual
;
6511 e
->value
.function
.name
= NULL
;
6512 e
->value
.function
.esym
= target
->n
.sym
;
6513 e
->value
.function
.isym
= NULL
;
6514 e
->symtree
= target
;
6515 e
->ts
= target
->n
.sym
->ts
;
6516 e
->expr_type
= EXPR_FUNCTION
;
6518 /* Resolution is not necessary if this is a class subroutine; this
6519 function only has to identify the specific proc. Resolution of
6520 the call will be done next in resolve_typebound_call. */
6521 return gfc_resolve_expr (e
);
6525 static bool resolve_fl_derived (gfc_symbol
*sym
);
6528 /* Resolve a typebound function, or 'method'. First separate all
6529 the non-CLASS references by calling resolve_compcall directly. */
6532 resolve_typebound_function (gfc_expr
* e
)
6534 gfc_symbol
*declared
;
6546 /* Deal with typebound operators for CLASS objects. */
6547 expr
= e
->value
.compcall
.base_object
;
6548 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6549 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6551 /* Since the typebound operators are generic, we have to ensure
6552 that any delays in resolution are corrected and that the vtab
6555 declared
= ts
.u
.derived
;
6556 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6557 if (c
->ts
.u
.derived
== NULL
)
6558 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6560 if (!resolve_compcall (e
, &name
))
6563 /* Use the generic name if it is there. */
6564 name
= name
? name
: e
->value
.function
.esym
->name
;
6565 e
->symtree
= expr
->symtree
;
6566 e
->ref
= gfc_copy_ref (expr
->ref
);
6567 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6569 /* Trim away the extraneous references that emerge from nested
6570 use of interface.c (extend_expr). */
6571 if (class_ref
&& class_ref
->next
)
6573 gfc_free_ref_list (class_ref
->next
);
6574 class_ref
->next
= NULL
;
6576 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6578 gfc_free_ref_list (e
->ref
);
6582 gfc_add_vptr_component (e
);
6583 gfc_add_component_ref (e
, name
);
6584 e
->value
.function
.esym
= NULL
;
6585 if (expr
->expr_type
!= EXPR_VARIABLE
)
6586 e
->base_expr
= expr
;
6591 return resolve_compcall (e
, NULL
);
6593 if (!resolve_ref (e
))
6596 /* Get the CLASS declared type. */
6597 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6599 if (!resolve_fl_derived (declared
))
6602 /* Weed out cases of the ultimate component being a derived type. */
6603 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6604 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6606 gfc_free_ref_list (new_ref
);
6607 return resolve_compcall (e
, NULL
);
6610 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6612 /* Treat the call as if it is a typebound procedure, in order to roll
6613 out the correct name for the specific function. */
6614 if (!resolve_compcall (e
, &name
))
6616 gfc_free_ref_list (new_ref
);
6623 /* Convert the expression to a procedure pointer component call. */
6624 e
->value
.function
.esym
= NULL
;
6630 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6631 gfc_add_vptr_component (e
);
6632 gfc_add_component_ref (e
, name
);
6634 /* Recover the typespec for the expression. This is really only
6635 necessary for generic procedures, where the additional call
6636 to gfc_add_component_ref seems to throw the collection of the
6637 correct typespec. */
6641 gfc_free_ref_list (new_ref
);
6646 /* Resolve a typebound subroutine, or 'method'. First separate all
6647 the non-CLASS references by calling resolve_typebound_call
6651 resolve_typebound_subroutine (gfc_code
*code
)
6653 gfc_symbol
*declared
;
6663 st
= code
->expr1
->symtree
;
6665 /* Deal with typebound operators for CLASS objects. */
6666 expr
= code
->expr1
->value
.compcall
.base_object
;
6667 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6668 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6670 /* If the base_object is not a variable, the corresponding actual
6671 argument expression must be stored in e->base_expression so
6672 that the corresponding tree temporary can be used as the base
6673 object in gfc_conv_procedure_call. */
6674 if (expr
->expr_type
!= EXPR_VARIABLE
)
6676 gfc_actual_arglist
*args
;
6678 args
= code
->expr1
->value
.function
.actual
;
6679 for (; args
; args
= args
->next
)
6680 if (expr
== args
->expr
)
6684 /* Since the typebound operators are generic, we have to ensure
6685 that any delays in resolution are corrected and that the vtab
6687 declared
= expr
->ts
.u
.derived
;
6688 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6689 if (c
->ts
.u
.derived
== NULL
)
6690 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6692 if (!resolve_typebound_call (code
, &name
, NULL
))
6695 /* Use the generic name if it is there. */
6696 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6697 code
->expr1
->symtree
= expr
->symtree
;
6698 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6700 /* Trim away the extraneous references that emerge from nested
6701 use of interface.c (extend_expr). */
6702 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6703 if (class_ref
&& class_ref
->next
)
6705 gfc_free_ref_list (class_ref
->next
);
6706 class_ref
->next
= NULL
;
6708 else if (code
->expr1
->ref
&& !class_ref
)
6710 gfc_free_ref_list (code
->expr1
->ref
);
6711 code
->expr1
->ref
= NULL
;
6714 /* Now use the procedure in the vtable. */
6715 gfc_add_vptr_component (code
->expr1
);
6716 gfc_add_component_ref (code
->expr1
, name
);
6717 code
->expr1
->value
.function
.esym
= NULL
;
6718 if (expr
->expr_type
!= EXPR_VARIABLE
)
6719 code
->expr1
->base_expr
= expr
;
6724 return resolve_typebound_call (code
, NULL
, NULL
);
6726 if (!resolve_ref (code
->expr1
))
6729 /* Get the CLASS declared type. */
6730 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6732 /* Weed out cases of the ultimate component being a derived type. */
6733 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6734 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6736 gfc_free_ref_list (new_ref
);
6737 return resolve_typebound_call (code
, NULL
, NULL
);
6740 if (!resolve_typebound_call (code
, &name
, &overridable
))
6742 gfc_free_ref_list (new_ref
);
6745 ts
= code
->expr1
->ts
;
6749 /* Convert the expression to a procedure pointer component call. */
6750 code
->expr1
->value
.function
.esym
= NULL
;
6751 code
->expr1
->symtree
= st
;
6754 code
->expr1
->ref
= new_ref
;
6756 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6757 gfc_add_vptr_component (code
->expr1
);
6758 gfc_add_component_ref (code
->expr1
, name
);
6760 /* Recover the typespec for the expression. This is really only
6761 necessary for generic procedures, where the additional call
6762 to gfc_add_component_ref seems to throw the collection of the
6763 correct typespec. */
6764 code
->expr1
->ts
= ts
;
6767 gfc_free_ref_list (new_ref
);
6773 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6776 resolve_ppc_call (gfc_code
* c
)
6778 gfc_component
*comp
;
6780 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6781 gcc_assert (comp
!= NULL
);
6783 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6784 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6786 if (!comp
->attr
.subroutine
)
6787 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6789 if (!resolve_ref (c
->expr1
))
6792 if (!update_ppc_arglist (c
->expr1
))
6795 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6797 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6798 !(comp
->ts
.interface
6799 && comp
->ts
.interface
->formal
)))
6802 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6805 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6811 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6814 resolve_expr_ppc (gfc_expr
* e
)
6816 gfc_component
*comp
;
6818 comp
= gfc_get_proc_ptr_comp (e
);
6819 gcc_assert (comp
!= NULL
);
6821 /* Convert to EXPR_FUNCTION. */
6822 e
->expr_type
= EXPR_FUNCTION
;
6823 e
->value
.function
.isym
= NULL
;
6824 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6826 if (comp
->as
!= NULL
)
6827 e
->rank
= comp
->as
->rank
;
6829 if (!comp
->attr
.function
)
6830 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6832 if (!resolve_ref (e
))
6835 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6836 !(comp
->ts
.interface
6837 && comp
->ts
.interface
->formal
)))
6840 if (!update_ppc_arglist (e
))
6843 if (!check_pure_function(e
))
6846 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6853 gfc_is_expandable_expr (gfc_expr
*e
)
6855 gfc_constructor
*con
;
6857 if (e
->expr_type
== EXPR_ARRAY
)
6859 /* Traverse the constructor looking for variables that are flavor
6860 parameter. Parameters must be expanded since they are fully used at
6862 con
= gfc_constructor_first (e
->value
.constructor
);
6863 for (; con
; con
= gfc_constructor_next (con
))
6865 if (con
->expr
->expr_type
== EXPR_VARIABLE
6866 && con
->expr
->symtree
6867 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6868 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6870 if (con
->expr
->expr_type
== EXPR_ARRAY
6871 && gfc_is_expandable_expr (con
->expr
))
6880 /* Sometimes variables in specification expressions of the result
6881 of module procedures in submodules wind up not being the 'real'
6882 dummy. Find this, if possible, in the namespace of the first
6886 fixup_unique_dummy (gfc_expr
*e
)
6888 gfc_symtree
*st
= NULL
;
6889 gfc_symbol
*s
= NULL
;
6891 if (e
->symtree
->n
.sym
->ns
->proc_name
6892 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6893 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6896 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6899 && st
->n
.sym
!= NULL
6900 && st
->n
.sym
->attr
.dummy
)
6904 /* Resolve an expression. That is, make sure that types of operands agree
6905 with their operators, intrinsic operators are converted to function calls
6906 for overloaded types and unresolved function references are resolved. */
6909 gfc_resolve_expr (gfc_expr
*e
)
6912 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6914 if (e
== NULL
|| e
->do_not_resolve_again
)
6917 /* inquiry_argument only applies to variables. */
6918 inquiry_save
= inquiry_argument
;
6919 actual_arg_save
= actual_arg
;
6920 first_actual_arg_save
= first_actual_arg
;
6922 if (e
->expr_type
!= EXPR_VARIABLE
)
6924 inquiry_argument
= false;
6926 first_actual_arg
= false;
6928 else if (e
->symtree
!= NULL
6929 && *e
->symtree
->name
== '@'
6930 && e
->symtree
->n
.sym
->attr
.dummy
)
6932 /* Deal with submodule specification expressions that are not
6933 found to be referenced in module.c(read_cleanup). */
6934 fixup_unique_dummy (e
);
6937 switch (e
->expr_type
)
6940 t
= resolve_operator (e
);
6946 if (check_host_association (e
))
6947 t
= resolve_function (e
);
6949 t
= resolve_variable (e
);
6951 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6952 && e
->ref
->type
!= REF_SUBSTRING
)
6953 gfc_resolve_substring_charlen (e
);
6958 t
= resolve_typebound_function (e
);
6961 case EXPR_SUBSTRING
:
6962 t
= resolve_ref (e
);
6971 t
= resolve_expr_ppc (e
);
6976 if (!resolve_ref (e
))
6979 t
= gfc_resolve_array_constructor (e
);
6980 /* Also try to expand a constructor. */
6983 expression_rank (e
);
6984 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6985 gfc_expand_constructor (e
, false);
6988 /* This provides the opportunity for the length of constructors with
6989 character valued function elements to propagate the string length
6990 to the expression. */
6991 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6993 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6994 here rather then add a duplicate test for it above. */
6995 gfc_expand_constructor (e
, false);
6996 t
= gfc_resolve_character_array_constructor (e
);
7001 case EXPR_STRUCTURE
:
7002 t
= resolve_ref (e
);
7006 t
= resolve_structure_cons (e
, 0);
7010 t
= gfc_simplify_expr (e
, 0);
7014 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7017 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7020 inquiry_argument
= inquiry_save
;
7021 actual_arg
= actual_arg_save
;
7022 first_actual_arg
= first_actual_arg_save
;
7024 /* For some reason, resolving these expressions a second time mangles
7025 the typespec of the expression itself. */
7026 if (t
&& e
->expr_type
== EXPR_VARIABLE
7027 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7028 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7029 e
->do_not_resolve_again
= 1;
7035 /* Resolve an expression from an iterator. They must be scalar and have
7036 INTEGER or (optionally) REAL type. */
7039 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7040 const char *name_msgid
)
7042 if (!gfc_resolve_expr (expr
))
7045 if (expr
->rank
!= 0)
7047 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7051 if (expr
->ts
.type
!= BT_INTEGER
)
7053 if (expr
->ts
.type
== BT_REAL
)
7056 return gfc_notify_std (GFC_STD_F95_DEL
,
7057 "%s at %L must be integer",
7058 _(name_msgid
), &expr
->where
);
7061 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7068 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7076 /* Resolve the expressions in an iterator structure. If REAL_OK is
7077 false allow only INTEGER type iterators, otherwise allow REAL types.
7078 Set own_scope to true for ac-implied-do and data-implied-do as those
7079 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7082 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7084 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7087 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7088 _("iterator variable")))
7091 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7092 "Start expression in DO loop"))
7095 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7096 "End expression in DO loop"))
7099 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7100 "Step expression in DO loop"))
7103 /* Convert start, end, and step to the same type as var. */
7104 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7105 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7106 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7108 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7109 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7110 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7112 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7113 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7114 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7116 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7118 if ((iter
->step
->ts
.type
== BT_INTEGER
7119 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7120 || (iter
->step
->ts
.type
== BT_REAL
7121 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7123 gfc_error ("Step expression in DO loop at %L cannot be zero",
7124 &iter
->step
->where
);
7129 if (iter
->start
->expr_type
== EXPR_CONSTANT
7130 && iter
->end
->expr_type
== EXPR_CONSTANT
7131 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7134 if (iter
->start
->ts
.type
== BT_INTEGER
)
7136 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7137 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7141 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7142 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7144 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7145 gfc_warning (OPT_Wzerotrip
,
7146 "DO loop at %L will be executed zero times",
7147 &iter
->step
->where
);
7150 if (iter
->end
->expr_type
== EXPR_CONSTANT
7151 && iter
->end
->ts
.type
== BT_INTEGER
7152 && iter
->step
->expr_type
== EXPR_CONSTANT
7153 && iter
->step
->ts
.type
== BT_INTEGER
7154 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7155 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7157 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7158 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7160 if (is_step_positive
7161 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7162 gfc_warning (OPT_Wundefined_do_loop
,
7163 "DO loop at %L is undefined as it overflows",
7164 &iter
->step
->where
);
7165 else if (!is_step_positive
7166 && mpz_cmp (iter
->end
->value
.integer
,
7167 gfc_integer_kinds
[k
].min_int
) == 0)
7168 gfc_warning (OPT_Wundefined_do_loop
,
7169 "DO loop at %L is undefined as it underflows",
7170 &iter
->step
->where
);
7177 /* Traversal function for find_forall_index. f == 2 signals that
7178 that variable itself is not to be checked - only the references. */
7181 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7183 if (expr
->expr_type
!= EXPR_VARIABLE
)
7186 /* A scalar assignment */
7187 if (!expr
->ref
|| *f
== 1)
7189 if (expr
->symtree
->n
.sym
== sym
)
7201 /* Check whether the FORALL index appears in the expression or not.
7202 Returns true if SYM is found in EXPR. */
7205 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7207 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7214 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7215 to be a scalar INTEGER variable. The subscripts and stride are scalar
7216 INTEGERs, and if stride is a constant it must be nonzero.
7217 Furthermore "A subscript or stride in a forall-triplet-spec shall
7218 not contain a reference to any index-name in the
7219 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7222 resolve_forall_iterators (gfc_forall_iterator
*it
)
7224 gfc_forall_iterator
*iter
, *iter2
;
7226 for (iter
= it
; iter
; iter
= iter
->next
)
7228 if (gfc_resolve_expr (iter
->var
)
7229 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7230 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7233 if (gfc_resolve_expr (iter
->start
)
7234 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7235 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7236 &iter
->start
->where
);
7237 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7238 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7240 if (gfc_resolve_expr (iter
->end
)
7241 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7242 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7244 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7245 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7247 if (gfc_resolve_expr (iter
->stride
))
7249 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7250 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7251 &iter
->stride
->where
, "INTEGER");
7253 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7254 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7255 gfc_error ("FORALL stride expression at %L cannot be zero",
7256 &iter
->stride
->where
);
7258 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7259 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7262 for (iter
= it
; iter
; iter
= iter
->next
)
7263 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7265 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7266 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7267 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7268 gfc_error ("FORALL index %qs may not appear in triplet "
7269 "specification at %L", iter
->var
->symtree
->name
,
7270 &iter2
->start
->where
);
7275 /* Given a pointer to a symbol that is a derived type, see if it's
7276 inaccessible, i.e. if it's defined in another module and the components are
7277 PRIVATE. The search is recursive if necessary. Returns zero if no
7278 inaccessible components are found, nonzero otherwise. */
7281 derived_inaccessible (gfc_symbol
*sym
)
7285 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7288 for (c
= sym
->components
; c
; c
= c
->next
)
7290 /* Prevent an infinite loop through this function. */
7291 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7292 && sym
== c
->ts
.u
.derived
)
7295 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7303 /* Resolve the argument of a deallocate expression. The expression must be
7304 a pointer or a full array. */
7307 resolve_deallocate_expr (gfc_expr
*e
)
7309 symbol_attribute attr
;
7310 int allocatable
, pointer
;
7316 if (!gfc_resolve_expr (e
))
7319 if (e
->expr_type
!= EXPR_VARIABLE
)
7322 sym
= e
->symtree
->n
.sym
;
7323 unlimited
= UNLIMITED_POLY(sym
);
7325 if (sym
->ts
.type
== BT_CLASS
)
7327 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7328 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7332 allocatable
= sym
->attr
.allocatable
;
7333 pointer
= sym
->attr
.pointer
;
7335 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7340 if (ref
->u
.ar
.type
!= AR_FULL
7341 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7342 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7347 c
= ref
->u
.c
.component
;
7348 if (c
->ts
.type
== BT_CLASS
)
7350 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7351 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7355 allocatable
= c
->attr
.allocatable
;
7356 pointer
= c
->attr
.pointer
;
7367 attr
= gfc_expr_attr (e
);
7369 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7372 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7378 if (gfc_is_coindexed (e
))
7380 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7385 && !gfc_check_vardef_context (e
, true, true, false,
7386 _("DEALLOCATE object")))
7388 if (!gfc_check_vardef_context (e
, false, true, false,
7389 _("DEALLOCATE object")))
7396 /* Returns true if the expression e contains a reference to the symbol sym. */
7398 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7400 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7407 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7409 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7413 /* Given the expression node e for an allocatable/pointer of derived type to be
7414 allocated, get the expression node to be initialized afterwards (needed for
7415 derived types with default initializers, and derived types with allocatable
7416 components that need nullification.) */
7419 gfc_expr_to_initialize (gfc_expr
*e
)
7425 result
= gfc_copy_expr (e
);
7427 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7428 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7429 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7431 if (ref
->u
.ar
.dimen
== 0
7432 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7435 ref
->u
.ar
.type
= AR_FULL
;
7437 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7438 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7443 gfc_free_shape (&result
->shape
, result
->rank
);
7445 /* Recalculate rank, shape, etc. */
7446 gfc_resolve_expr (result
);
7451 /* If the last ref of an expression is an array ref, return a copy of the
7452 expression with that one removed. Otherwise, a copy of the original
7453 expression. This is used for allocate-expressions and pointer assignment
7454 LHS, where there may be an array specification that needs to be stripped
7455 off when using gfc_check_vardef_context. */
7458 remove_last_array_ref (gfc_expr
* e
)
7463 e2
= gfc_copy_expr (e
);
7464 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7465 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7467 gfc_free_ref_list (*r
);
7476 /* Used in resolve_allocate_expr to check that a allocation-object and
7477 a source-expr are conformable. This does not catch all possible
7478 cases; in particular a runtime checking is needed. */
7481 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7484 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7486 /* First compare rank. */
7487 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7488 || (!tail
&& e1
->rank
!= e2
->rank
))
7490 gfc_error ("Source-expr at %L must be scalar or have the "
7491 "same rank as the allocate-object at %L",
7492 &e1
->where
, &e2
->where
);
7503 for (i
= 0; i
< e1
->rank
; i
++)
7505 if (tail
->u
.ar
.start
[i
] == NULL
)
7508 if (tail
->u
.ar
.end
[i
])
7510 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7511 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7512 mpz_add_ui (s
, s
, 1);
7516 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7519 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7521 gfc_error ("Source-expr at %L and allocate-object at %L must "
7522 "have the same shape", &e1
->where
, &e2
->where
);
7535 /* Resolve the expression in an ALLOCATE statement, doing the additional
7536 checks to see whether the expression is OK or not. The expression must
7537 have a trailing array reference that gives the size of the array. */
7540 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7542 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7546 symbol_attribute attr
;
7547 gfc_ref
*ref
, *ref2
;
7550 gfc_symbol
*sym
= NULL
;
7555 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7556 checking of coarrays. */
7557 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7558 if (ref
->next
== NULL
)
7561 if (ref
&& ref
->type
== REF_ARRAY
)
7562 ref
->u
.ar
.in_allocate
= true;
7564 if (!gfc_resolve_expr (e
))
7567 /* Make sure the expression is allocatable or a pointer. If it is
7568 pointer, the next-to-last reference must be a pointer. */
7572 sym
= e
->symtree
->n
.sym
;
7574 /* Check whether ultimate component is abstract and CLASS. */
7577 /* Is the allocate-object unlimited polymorphic? */
7578 unlimited
= UNLIMITED_POLY(e
);
7580 if (e
->expr_type
!= EXPR_VARIABLE
)
7583 attr
= gfc_expr_attr (e
);
7584 pointer
= attr
.pointer
;
7585 dimension
= attr
.dimension
;
7586 codimension
= attr
.codimension
;
7590 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7592 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7593 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7594 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7595 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7596 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7600 allocatable
= sym
->attr
.allocatable
;
7601 pointer
= sym
->attr
.pointer
;
7602 dimension
= sym
->attr
.dimension
;
7603 codimension
= sym
->attr
.codimension
;
7608 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7613 if (ref
->u
.ar
.codimen
> 0)
7616 for (n
= ref
->u
.ar
.dimen
;
7617 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7618 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7625 if (ref
->next
!= NULL
)
7633 gfc_error ("Coindexed allocatable object at %L",
7638 c
= ref
->u
.c
.component
;
7639 if (c
->ts
.type
== BT_CLASS
)
7641 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7642 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7643 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7644 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7645 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7649 allocatable
= c
->attr
.allocatable
;
7650 pointer
= c
->attr
.pointer
;
7651 dimension
= c
->attr
.dimension
;
7652 codimension
= c
->attr
.codimension
;
7653 is_abstract
= c
->attr
.abstract
;
7666 /* Check for F08:C628. */
7667 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7669 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7674 /* Some checks for the SOURCE tag. */
7677 /* Check F03:C631. */
7678 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7680 gfc_error ("Type of entity at %L is type incompatible with "
7681 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7685 /* Check F03:C632 and restriction following Note 6.18. */
7686 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7689 /* Check F03:C633. */
7690 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7692 gfc_error ("The allocate-object at %L and the source-expr at %L "
7693 "shall have the same kind type parameter",
7694 &e
->where
, &code
->expr3
->where
);
7698 /* Check F2008, C642. */
7699 if (code
->expr3
->ts
.type
== BT_DERIVED
7700 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7701 || (code
->expr3
->ts
.u
.derived
->from_intmod
7702 == INTMOD_ISO_FORTRAN_ENV
7703 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7704 == ISOFORTRAN_LOCK_TYPE
)))
7706 gfc_error ("The source-expr at %L shall neither be of type "
7707 "LOCK_TYPE nor have a LOCK_TYPE component if "
7708 "allocate-object at %L is a coarray",
7709 &code
->expr3
->where
, &e
->where
);
7713 /* Check TS18508, C702/C703. */
7714 if (code
->expr3
->ts
.type
== BT_DERIVED
7715 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7716 || (code
->expr3
->ts
.u
.derived
->from_intmod
7717 == INTMOD_ISO_FORTRAN_ENV
7718 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7719 == ISOFORTRAN_EVENT_TYPE
)))
7721 gfc_error ("The source-expr at %L shall neither be of type "
7722 "EVENT_TYPE nor have a EVENT_TYPE component if "
7723 "allocate-object at %L is a coarray",
7724 &code
->expr3
->where
, &e
->where
);
7729 /* Check F08:C629. */
7730 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7733 gcc_assert (e
->ts
.type
== BT_CLASS
);
7734 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7735 "type-spec or source-expr", sym
->name
, &e
->where
);
7739 /* Check F08:C632. */
7740 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7741 && !UNLIMITED_POLY (e
))
7745 if (!e
->ts
.u
.cl
->length
)
7748 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7749 code
->ext
.alloc
.ts
.u
.cl
->length
);
7750 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7752 gfc_error ("Allocating %s at %L with type-spec requires the same "
7753 "character-length parameter as in the declaration",
7754 sym
->name
, &e
->where
);
7759 /* In the variable definition context checks, gfc_expr_attr is used
7760 on the expression. This is fooled by the array specification
7761 present in e, thus we have to eliminate that one temporarily. */
7762 e2
= remove_last_array_ref (e
);
7765 t
= gfc_check_vardef_context (e2
, true, true, false,
7766 _("ALLOCATE object"));
7768 t
= gfc_check_vardef_context (e2
, false, true, false,
7769 _("ALLOCATE object"));
7774 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7775 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7777 /* For class arrays, the initialization with SOURCE is done
7778 using _copy and trans_call. It is convenient to exploit that
7779 when the allocated type is different from the declared type but
7780 no SOURCE exists by setting expr3. */
7781 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7783 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7784 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7785 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7787 /* We have to zero initialize the integer variable. */
7788 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7791 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7793 /* Make sure the vtab symbol is present when
7794 the module variables are generated. */
7795 gfc_typespec ts
= e
->ts
;
7797 ts
= code
->expr3
->ts
;
7798 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7799 ts
= code
->ext
.alloc
.ts
;
7801 /* Finding the vtab also publishes the type's symbol. Therefore this
7802 statement is necessary. */
7803 gfc_find_derived_vtab (ts
.u
.derived
);
7805 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7807 /* Again, make sure the vtab symbol is present when
7808 the module variables are generated. */
7809 gfc_typespec
*ts
= NULL
;
7811 ts
= &code
->expr3
->ts
;
7813 ts
= &code
->ext
.alloc
.ts
;
7817 /* Finding the vtab also publishes the type's symbol. Therefore this
7818 statement is necessary. */
7822 if (dimension
== 0 && codimension
== 0)
7825 /* Make sure the last reference node is an array specification. */
7827 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7828 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7833 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7834 "in ALLOCATE statement at %L", &e
->where
))
7836 if (code
->expr3
->rank
!= 0)
7837 *array_alloc_wo_spec
= true;
7840 gfc_error ("Array specification or array-valued SOURCE= "
7841 "expression required in ALLOCATE statement at %L",
7848 gfc_error ("Array specification required in ALLOCATE statement "
7849 "at %L", &e
->where
);
7854 /* Make sure that the array section reference makes sense in the
7855 context of an ALLOCATE specification. */
7860 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7862 switch (ar
->dimen_type
[i
])
7864 case DIMEN_THIS_IMAGE
:
7865 gfc_error ("Coarray specification required in ALLOCATE statement "
7866 "at %L", &e
->where
);
7870 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7872 /* If ar->stride[i] is NULL, we issued a previous error. */
7873 if (ar
->stride
[i
] == NULL
)
7874 gfc_error ("Bad array specification in ALLOCATE statement "
7875 "at %L", &e
->where
);
7878 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7880 gfc_error ("Upper cobound is less than lower cobound at %L",
7881 &ar
->start
[i
]->where
);
7887 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7889 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7890 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7892 gfc_error ("Upper cobound is less than lower cobound "
7893 "of 1 at %L", &ar
->start
[i
]->where
);
7903 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7909 for (i
= 0; i
< ar
->dimen
; i
++)
7911 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7914 switch (ar
->dimen_type
[i
])
7920 if (ar
->start
[i
] != NULL
7921 && ar
->end
[i
] != NULL
7922 && ar
->stride
[i
] == NULL
)
7930 case DIMEN_THIS_IMAGE
:
7931 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7937 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7939 sym
= a
->expr
->symtree
->n
.sym
;
7941 /* TODO - check derived type components. */
7942 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7945 if ((ar
->start
[i
] != NULL
7946 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7947 || (ar
->end
[i
] != NULL
7948 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7950 gfc_error ("%qs must not appear in the array specification at "
7951 "%L in the same ALLOCATE statement where it is "
7952 "itself allocated", sym
->name
, &ar
->where
);
7958 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7960 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7961 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7963 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7965 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7966 "statement at %L", &e
->where
);
7972 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7973 && ar
->stride
[i
] == NULL
)
7976 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7990 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7992 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7993 gfc_alloc
*a
, *p
, *q
;
7996 errmsg
= code
->expr2
;
7998 /* Check the stat variable. */
8001 gfc_check_vardef_context (stat
, false, false, false,
8002 _("STAT variable"));
8004 if ((stat
->ts
.type
!= BT_INTEGER
8005 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8006 || stat
->ref
->type
== REF_COMPONENT
)))
8008 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8009 "variable", &stat
->where
);
8011 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8012 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8014 gfc_ref
*ref1
, *ref2
;
8017 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8018 ref1
= ref1
->next
, ref2
= ref2
->next
)
8020 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8022 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8031 gfc_error ("Stat-variable at %L shall not be %sd within "
8032 "the same %s statement", &stat
->where
, fcn
, fcn
);
8038 /* Check the errmsg variable. */
8042 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8045 gfc_check_vardef_context (errmsg
, false, false, false,
8046 _("ERRMSG variable"));
8048 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8049 F18:R930 errmsg-variable is scalar-default-char-variable
8050 F18:R906 default-char-variable is variable
8051 F18:C906 default-char-variable shall be default character. */
8052 if ((errmsg
->ts
.type
!= BT_CHARACTER
8054 && (errmsg
->ref
->type
== REF_ARRAY
8055 || errmsg
->ref
->type
== REF_COMPONENT
)))
8057 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8058 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8059 "variable", &errmsg
->where
);
8061 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8062 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8064 gfc_ref
*ref1
, *ref2
;
8067 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8068 ref1
= ref1
->next
, ref2
= ref2
->next
)
8070 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8072 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8081 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8082 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8088 /* Check that an allocate-object appears only once in the statement. */
8090 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8093 for (q
= p
->next
; q
; q
= q
->next
)
8096 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8098 /* This is a potential collision. */
8099 gfc_ref
*pr
= pe
->ref
;
8100 gfc_ref
*qr
= qe
->ref
;
8102 /* Follow the references until
8103 a) They start to differ, in which case there is no error;
8104 you can deallocate a%b and a%c in a single statement
8105 b) Both of them stop, which is an error
8106 c) One of them stops, which is also an error. */
8109 if (pr
== NULL
&& qr
== NULL
)
8111 gfc_error ("Allocate-object at %L also appears at %L",
8112 &pe
->where
, &qe
->where
);
8115 else if (pr
!= NULL
&& qr
== NULL
)
8117 gfc_error ("Allocate-object at %L is subobject of"
8118 " object at %L", &pe
->where
, &qe
->where
);
8121 else if (pr
== NULL
&& qr
!= NULL
)
8123 gfc_error ("Allocate-object at %L is subobject of"
8124 " object at %L", &qe
->where
, &pe
->where
);
8127 /* Here, pr != NULL && qr != NULL */
8128 gcc_assert(pr
->type
== qr
->type
);
8129 if (pr
->type
== REF_ARRAY
)
8131 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8133 gcc_assert (qr
->type
== REF_ARRAY
);
8135 if (pr
->next
&& qr
->next
)
8138 gfc_array_ref
*par
= &(pr
->u
.ar
);
8139 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8141 for (i
=0; i
<par
->dimen
; i
++)
8143 if ((par
->start
[i
] != NULL
8144 || qar
->start
[i
] != NULL
)
8145 && gfc_dep_compare_expr (par
->start
[i
],
8146 qar
->start
[i
]) != 0)
8153 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8166 if (strcmp (fcn
, "ALLOCATE") == 0)
8168 bool arr_alloc_wo_spec
= false;
8170 /* Resolving the expr3 in the loop over all objects to allocate would
8171 execute loop invariant code for each loop item. Therefore do it just
8173 if (code
->expr3
&& code
->expr3
->mold
8174 && code
->expr3
->ts
.type
== BT_DERIVED
)
8176 /* Default initialization via MOLD (non-polymorphic). */
8177 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8180 gfc_resolve_expr (rhs
);
8181 gfc_free_expr (code
->expr3
);
8185 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8186 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8188 if (arr_alloc_wo_spec
&& code
->expr3
)
8190 /* Mark the allocate to have to take the array specification
8192 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8197 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8198 resolve_deallocate_expr (a
->expr
);
8203 /************ SELECT CASE resolution subroutines ************/
8205 /* Callback function for our mergesort variant. Determines interval
8206 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8207 op1 > op2. Assumes we're not dealing with the default case.
8208 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8209 There are nine situations to check. */
8212 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8216 if (op1
->low
== NULL
) /* op1 = (:L) */
8218 /* op2 = (:N), so overlap. */
8220 /* op2 = (M:) or (M:N), L < M */
8221 if (op2
->low
!= NULL
8222 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8225 else if (op1
->high
== NULL
) /* op1 = (K:) */
8227 /* op2 = (M:), so overlap. */
8229 /* op2 = (:N) or (M:N), K > N */
8230 if (op2
->high
!= NULL
8231 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8234 else /* op1 = (K:L) */
8236 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8237 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8239 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8240 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8242 else /* op2 = (M:N) */
8246 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8249 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8258 /* Merge-sort a double linked case list, detecting overlap in the
8259 process. LIST is the head of the double linked case list before it
8260 is sorted. Returns the head of the sorted list if we don't see any
8261 overlap, or NULL otherwise. */
8264 check_case_overlap (gfc_case
*list
)
8266 gfc_case
*p
, *q
, *e
, *tail
;
8267 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8269 /* If the passed list was empty, return immediately. */
8276 /* Loop unconditionally. The only exit from this loop is a return
8277 statement, when we've finished sorting the case list. */
8284 /* Count the number of merges we do in this pass. */
8287 /* Loop while there exists a merge to be done. */
8292 /* Count this merge. */
8295 /* Cut the list in two pieces by stepping INSIZE places
8296 forward in the list, starting from P. */
8299 for (i
= 0; i
< insize
; i
++)
8308 /* Now we have two lists. Merge them! */
8309 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8311 /* See from which the next case to merge comes from. */
8314 /* P is empty so the next case must come from Q. */
8319 else if (qsize
== 0 || q
== NULL
)
8328 cmp
= compare_cases (p
, q
);
8331 /* The whole case range for P is less than the
8339 /* The whole case range for Q is greater than
8340 the case range for P. */
8347 /* The cases overlap, or they are the same
8348 element in the list. Either way, we must
8349 issue an error and get the next case from P. */
8350 /* FIXME: Sort P and Q by line number. */
8351 gfc_error ("CASE label at %L overlaps with CASE "
8352 "label at %L", &p
->where
, &q
->where
);
8360 /* Add the next element to the merged list. */
8369 /* P has now stepped INSIZE places along, and so has Q. So
8370 they're the same. */
8375 /* If we have done only one merge or none at all, we've
8376 finished sorting the cases. */
8385 /* Otherwise repeat, merging lists twice the size. */
8391 /* Check to see if an expression is suitable for use in a CASE statement.
8392 Makes sure that all case expressions are scalar constants of the same
8393 type. Return false if anything is wrong. */
8396 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8398 if (e
== NULL
) return true;
8400 if (e
->ts
.type
!= case_expr
->ts
.type
)
8402 gfc_error ("Expression in CASE statement at %L must be of type %s",
8403 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8407 /* C805 (R808) For a given case-construct, each case-value shall be of
8408 the same type as case-expr. For character type, length differences
8409 are allowed, but the kind type parameters shall be the same. */
8411 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8413 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8414 &e
->where
, case_expr
->ts
.kind
);
8418 /* Convert the case value kind to that of case expression kind,
8421 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8422 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8426 gfc_error ("Expression in CASE statement at %L must be scalar",
8435 /* Given a completely parsed select statement, we:
8437 - Validate all expressions and code within the SELECT.
8438 - Make sure that the selection expression is not of the wrong type.
8439 - Make sure that no case ranges overlap.
8440 - Eliminate unreachable cases and unreachable code resulting from
8441 removing case labels.
8443 The standard does allow unreachable cases, e.g. CASE (5:3). But
8444 they are a hassle for code generation, and to prevent that, we just
8445 cut them out here. This is not necessary for overlapping cases
8446 because they are illegal and we never even try to generate code.
8448 We have the additional caveat that a SELECT construct could have
8449 been a computed GOTO in the source code. Fortunately we can fairly
8450 easily work around that here: The case_expr for a "real" SELECT CASE
8451 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8452 we have to do is make sure that the case_expr is a scalar integer
8456 resolve_select (gfc_code
*code
, bool select_type
)
8459 gfc_expr
*case_expr
;
8460 gfc_case
*cp
, *default_case
, *tail
, *head
;
8461 int seen_unreachable
;
8467 if (code
->expr1
== NULL
)
8469 /* This was actually a computed GOTO statement. */
8470 case_expr
= code
->expr2
;
8471 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8472 gfc_error ("Selection expression in computed GOTO statement "
8473 "at %L must be a scalar integer expression",
8476 /* Further checking is not necessary because this SELECT was built
8477 by the compiler, so it should always be OK. Just move the
8478 case_expr from expr2 to expr so that we can handle computed
8479 GOTOs as normal SELECTs from here on. */
8480 code
->expr1
= code
->expr2
;
8485 case_expr
= code
->expr1
;
8486 type
= case_expr
->ts
.type
;
8489 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8491 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8492 &case_expr
->where
, gfc_typename (case_expr
));
8494 /* Punt. Going on here just produce more garbage error messages. */
8499 if (!select_type
&& case_expr
->rank
!= 0)
8501 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8502 "expression", &case_expr
->where
);
8508 /* Raise a warning if an INTEGER case value exceeds the range of
8509 the case-expr. Later, all expressions will be promoted to the
8510 largest kind of all case-labels. */
8512 if (type
== BT_INTEGER
)
8513 for (body
= code
->block
; body
; body
= body
->block
)
8514 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8517 && gfc_check_integer_range (cp
->low
->value
.integer
,
8518 case_expr
->ts
.kind
) != ARITH_OK
)
8519 gfc_warning (0, "Expression in CASE statement at %L is "
8520 "not in the range of %s", &cp
->low
->where
,
8521 gfc_typename (case_expr
));
8524 && cp
->low
!= cp
->high
8525 && gfc_check_integer_range (cp
->high
->value
.integer
,
8526 case_expr
->ts
.kind
) != ARITH_OK
)
8527 gfc_warning (0, "Expression in CASE statement at %L is "
8528 "not in the range of %s", &cp
->high
->where
,
8529 gfc_typename (case_expr
));
8532 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8533 of the SELECT CASE expression and its CASE values. Walk the lists
8534 of case values, and if we find a mismatch, promote case_expr to
8535 the appropriate kind. */
8537 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8539 for (body
= code
->block
; body
; body
= body
->block
)
8541 /* Walk the case label list. */
8542 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8544 /* Intercept the DEFAULT case. It does not have a kind. */
8545 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8548 /* Unreachable case ranges are discarded, so ignore. */
8549 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8550 && cp
->low
!= cp
->high
8551 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8555 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8556 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8558 if (cp
->high
!= NULL
8559 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8560 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8565 /* Assume there is no DEFAULT case. */
8566 default_case
= NULL
;
8571 for (body
= code
->block
; body
; body
= body
->block
)
8573 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8575 seen_unreachable
= 0;
8577 /* Walk the case label list, making sure that all case labels
8579 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8581 /* Count the number of cases in the whole construct. */
8584 /* Intercept the DEFAULT case. */
8585 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8587 if (default_case
!= NULL
)
8589 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8590 "by a second DEFAULT CASE at %L",
8591 &default_case
->where
, &cp
->where
);
8602 /* Deal with single value cases and case ranges. Errors are
8603 issued from the validation function. */
8604 if (!validate_case_label_expr (cp
->low
, case_expr
)
8605 || !validate_case_label_expr (cp
->high
, case_expr
))
8611 if (type
== BT_LOGICAL
8612 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8613 || cp
->low
!= cp
->high
))
8615 gfc_error ("Logical range in CASE statement at %L is not "
8616 "allowed", &cp
->low
->where
);
8621 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8624 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8625 if (value
& seen_logical
)
8627 gfc_error ("Constant logical value in CASE statement "
8628 "is repeated at %L",
8633 seen_logical
|= value
;
8636 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8637 && cp
->low
!= cp
->high
8638 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8640 if (warn_surprising
)
8641 gfc_warning (OPT_Wsurprising
,
8642 "Range specification at %L can never be matched",
8645 cp
->unreachable
= 1;
8646 seen_unreachable
= 1;
8650 /* If the case range can be matched, it can also overlap with
8651 other cases. To make sure it does not, we put it in a
8652 double linked list here. We sort that with a merge sort
8653 later on to detect any overlapping cases. */
8657 head
->right
= head
->left
= NULL
;
8662 tail
->right
->left
= tail
;
8669 /* It there was a failure in the previous case label, give up
8670 for this case label list. Continue with the next block. */
8674 /* See if any case labels that are unreachable have been seen.
8675 If so, we eliminate them. This is a bit of a kludge because
8676 the case lists for a single case statement (label) is a
8677 single forward linked lists. */
8678 if (seen_unreachable
)
8680 /* Advance until the first case in the list is reachable. */
8681 while (body
->ext
.block
.case_list
!= NULL
8682 && body
->ext
.block
.case_list
->unreachable
)
8684 gfc_case
*n
= body
->ext
.block
.case_list
;
8685 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8687 gfc_free_case_list (n
);
8690 /* Strip all other unreachable cases. */
8691 if (body
->ext
.block
.case_list
)
8693 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8695 if (cp
->next
->unreachable
)
8697 gfc_case
*n
= cp
->next
;
8698 cp
->next
= cp
->next
->next
;
8700 gfc_free_case_list (n
);
8707 /* See if there were overlapping cases. If the check returns NULL,
8708 there was overlap. In that case we don't do anything. If head
8709 is non-NULL, we prepend the DEFAULT case. The sorted list can
8710 then used during code generation for SELECT CASE constructs with
8711 a case expression of a CHARACTER type. */
8714 head
= check_case_overlap (head
);
8716 /* Prepend the default_case if it is there. */
8717 if (head
!= NULL
&& default_case
)
8719 default_case
->left
= NULL
;
8720 default_case
->right
= head
;
8721 head
->left
= default_case
;
8725 /* Eliminate dead blocks that may be the result if we've seen
8726 unreachable case labels for a block. */
8727 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8729 if (body
->block
->ext
.block
.case_list
== NULL
)
8731 /* Cut the unreachable block from the code chain. */
8732 gfc_code
*c
= body
->block
;
8733 body
->block
= c
->block
;
8735 /* Kill the dead block, but not the blocks below it. */
8737 gfc_free_statements (c
);
8741 /* More than two cases is legal but insane for logical selects.
8742 Issue a warning for it. */
8743 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8744 gfc_warning (OPT_Wsurprising
,
8745 "Logical SELECT CASE block at %L has more that two cases",
8750 /* Check if a derived type is extensible. */
8753 gfc_type_is_extensible (gfc_symbol
*sym
)
8755 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8756 || (sym
->attr
.is_class
8757 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8762 resolve_types (gfc_namespace
*ns
);
8764 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8765 correct as well as possibly the array-spec. */
8768 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8772 gcc_assert (sym
->assoc
);
8773 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8775 /* If this is for SELECT TYPE, the target may not yet be set. In that
8776 case, return. Resolution will be called later manually again when
8778 target
= sym
->assoc
->target
;
8781 gcc_assert (!sym
->assoc
->dangling
);
8783 if (resolve_target
&& !gfc_resolve_expr (target
))
8786 /* For variable targets, we get some attributes from the target. */
8787 if (target
->expr_type
== EXPR_VARIABLE
)
8791 gcc_assert (target
->symtree
);
8792 tsym
= target
->symtree
->n
.sym
;
8794 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8795 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8797 sym
->attr
.target
= tsym
->attr
.target
8798 || gfc_expr_attr (target
).pointer
;
8799 if (is_subref_array (target
))
8800 sym
->attr
.subref_array_pointer
= 1;
8803 if (target
->expr_type
== EXPR_NULL
)
8805 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8808 else if (target
->ts
.type
== BT_UNKNOWN
)
8810 gfc_error ("Selector at %L has no type", &target
->where
);
8814 /* Get type if this was not already set. Note that it can be
8815 some other type than the target in case this is a SELECT TYPE
8816 selector! So we must not update when the type is already there. */
8817 if (sym
->ts
.type
== BT_UNKNOWN
)
8818 sym
->ts
= target
->ts
;
8820 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8822 /* See if this is a valid association-to-variable. */
8823 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8824 && !gfc_has_vector_subscript (target
));
8826 /* Finally resolve if this is an array or not. */
8827 if (sym
->attr
.dimension
&& target
->rank
== 0)
8829 /* primary.c makes the assumption that a reference to an associate
8830 name followed by a left parenthesis is an array reference. */
8831 if (sym
->ts
.type
!= BT_CHARACTER
)
8832 gfc_error ("Associate-name %qs at %L is used as array",
8833 sym
->name
, &sym
->declared_at
);
8834 sym
->attr
.dimension
= 0;
8839 /* We cannot deal with class selectors that need temporaries. */
8840 if (target
->ts
.type
== BT_CLASS
8841 && gfc_ref_needs_temporary_p (target
->ref
))
8843 gfc_error ("CLASS selector at %L needs a temporary which is not "
8844 "yet implemented", &target
->where
);
8848 if (target
->ts
.type
== BT_CLASS
)
8849 gfc_fix_class_refs (target
);
8851 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8854 /* The rank may be incorrectly guessed at parsing, therefore make sure
8855 it is corrected now. */
8856 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8859 sym
->as
= gfc_get_array_spec ();
8861 as
->rank
= target
->rank
;
8862 as
->type
= AS_DEFERRED
;
8863 as
->corank
= gfc_get_corank (target
);
8864 sym
->attr
.dimension
= 1;
8865 if (as
->corank
!= 0)
8866 sym
->attr
.codimension
= 1;
8868 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8870 if (!CLASS_DATA (sym
)->as
)
8871 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8872 as
= CLASS_DATA (sym
)->as
;
8873 as
->rank
= target
->rank
;
8874 as
->type
= AS_DEFERRED
;
8875 as
->corank
= gfc_get_corank (target
);
8876 CLASS_DATA (sym
)->attr
.dimension
= 1;
8877 if (as
->corank
!= 0)
8878 CLASS_DATA (sym
)->attr
.codimension
= 1;
8881 else if (!sym
->attr
.select_rank_temporary
)
8883 /* target's rank is 0, but the type of the sym is still array valued,
8884 which has to be corrected. */
8885 if (sym
->ts
.type
== BT_CLASS
8886 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8889 symbol_attribute attr
;
8890 /* The associated variable's type is still the array type
8891 correct this now. */
8892 gfc_typespec
*ts
= &target
->ts
;
8895 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8900 ts
= &ref
->u
.c
.component
->ts
;
8903 if (ts
->type
== BT_CLASS
)
8904 ts
= &ts
->u
.derived
->components
->ts
;
8910 /* Create a scalar instance of the current class type. Because the
8911 rank of a class array goes into its name, the type has to be
8912 rebuild. The alternative of (re-)setting just the attributes
8913 and as in the current type, destroys the type also in other
8917 sym
->ts
.type
= BT_CLASS
;
8918 attr
= CLASS_DATA (sym
)->attr
;
8920 attr
.associate_var
= 1;
8921 attr
.dimension
= attr
.codimension
= 0;
8922 attr
.class_pointer
= 1;
8923 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8925 /* Make sure the _vptr is set. */
8926 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8927 if (c
->ts
.u
.derived
== NULL
)
8928 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8929 CLASS_DATA (sym
)->attr
.pointer
= 1;
8930 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8931 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8932 gfc_commit_symbol (sym
->ts
.u
.derived
);
8933 /* _vptr now has the _vtab in it, change it to the _vtype. */
8934 if (c
->ts
.u
.derived
->attr
.vtab
)
8935 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8936 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8937 resolve_types (c
->ts
.u
.derived
->ns
);
8941 /* Mark this as an associate variable. */
8942 sym
->attr
.associate_var
= 1;
8944 /* Fix up the type-spec for CHARACTER types. */
8945 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8948 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8950 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8951 && target
->symtree
->n
.sym
->attr
.dummy
8952 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8954 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8955 sym
->ts
.deferred
= 1;
8958 if (!sym
->ts
.u
.cl
->length
8959 && !sym
->ts
.deferred
8960 && target
->expr_type
== EXPR_CONSTANT
)
8962 sym
->ts
.u
.cl
->length
=
8963 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8964 target
->value
.character
.length
);
8966 else if ((!sym
->ts
.u
.cl
->length
8967 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8968 && target
->expr_type
!= EXPR_VARIABLE
)
8970 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8971 sym
->ts
.deferred
= 1;
8973 /* This is reset in trans-stmt.c after the assignment
8974 of the target expression to the associate name. */
8975 sym
->attr
.allocatable
= 1;
8979 /* If the target is a good class object, so is the associate variable. */
8980 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8981 sym
->attr
.class_ok
= 1;
8985 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8986 array reference, where necessary. The symbols are artificial and so
8987 the dimension attribute and arrayspec can also be set. In addition,
8988 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8989 This is corrected here as well.*/
8992 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8993 int rank
, gfc_ref
*ref
)
8995 gfc_ref
*nref
= (*expr1
)->ref
;
8996 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8997 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8998 (*expr1
)->rank
= rank
;
8999 if (sym1
->ts
.type
== BT_CLASS
)
9001 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9002 (*expr1
)->ts
= sym1
->ts
;
9004 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9005 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9006 CLASS_DATA (sym1
)->as
9007 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9011 sym1
->attr
.dimension
= 1;
9012 if (sym1
->as
== NULL
&& sym2
)
9013 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9016 for (; nref
; nref
= nref
->next
)
9017 if (nref
->next
== NULL
)
9020 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9021 nref
->next
= gfc_copy_ref (ref
);
9022 else if (ref
&& !nref
)
9023 (*expr1
)->ref
= gfc_copy_ref (ref
);
9028 build_loc_call (gfc_expr
*sym_expr
)
9031 loc_call
= gfc_get_expr ();
9032 loc_call
->expr_type
= EXPR_FUNCTION
;
9033 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9034 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9035 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9036 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9037 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9038 loc_call
->ts
.type
= BT_INTEGER
;
9039 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9040 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9041 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9042 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9043 loc_call
->where
= sym_expr
->where
;
9047 /* Resolve a SELECT TYPE statement. */
9050 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9052 gfc_symbol
*selector_type
;
9053 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9054 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9057 char name
[GFC_MAX_SYMBOL_LEN
];
9061 gfc_ref
* ref
= NULL
;
9062 gfc_expr
*selector_expr
= NULL
;
9064 ns
= code
->ext
.block
.ns
;
9067 /* Check for F03:C813. */
9068 if (code
->expr1
->ts
.type
!= BT_CLASS
9069 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9071 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9072 "at %L", &code
->loc
);
9076 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9081 gfc_ref
*ref2
= NULL
;
9082 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9083 if (ref
->type
== REF_COMPONENT
9084 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9089 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9090 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9091 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9095 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9096 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9097 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9100 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9101 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9103 /* F2008: C803 The selector expression must not be coindexed. */
9104 if (gfc_is_coindexed (code
->expr2
))
9106 gfc_error ("Selector at %L must not be coindexed",
9107 &code
->expr2
->where
);
9114 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9116 if (gfc_is_coindexed (code
->expr1
))
9118 gfc_error ("Selector at %L must not be coindexed",
9119 &code
->expr1
->where
);
9124 /* Loop over TYPE IS / CLASS IS cases. */
9125 for (body
= code
->block
; body
; body
= body
->block
)
9127 c
= body
->ext
.block
.case_list
;
9131 /* Check for repeated cases. */
9132 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9134 gfc_case
*d
= tail
->ext
.block
.case_list
;
9138 if (c
->ts
.type
== d
->ts
.type
9139 && ((c
->ts
.type
== BT_DERIVED
9140 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9141 && !strcmp (c
->ts
.u
.derived
->name
,
9142 d
->ts
.u
.derived
->name
))
9143 || c
->ts
.type
== BT_UNKNOWN
9144 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9145 && c
->ts
.kind
== d
->ts
.kind
)))
9147 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9148 &c
->where
, &d
->where
);
9154 /* Check F03:C815. */
9155 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9156 && !selector_type
->attr
.unlimited_polymorphic
9157 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9159 gfc_error ("Derived type %qs at %L must be extensible",
9160 c
->ts
.u
.derived
->name
, &c
->where
);
9165 /* Check F03:C816. */
9166 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9167 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9168 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9170 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9171 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9172 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9174 gfc_error ("Unexpected intrinsic type %qs at %L",
9175 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9180 /* Check F03:C814. */
9181 if (c
->ts
.type
== BT_CHARACTER
9182 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9184 gfc_error ("The type-spec at %L shall specify that each length "
9185 "type parameter is assumed", &c
->where
);
9190 /* Intercept the DEFAULT case. */
9191 if (c
->ts
.type
== BT_UNKNOWN
)
9193 /* Check F03:C818. */
9196 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9197 "by a second DEFAULT CASE at %L",
9198 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9203 default_case
= body
;
9210 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9211 target if present. If there are any EXIT statements referring to the
9212 SELECT TYPE construct, this is no problem because the gfc_code
9213 reference stays the same and EXIT is equally possible from the BLOCK
9214 it is changed to. */
9215 code
->op
= EXEC_BLOCK
;
9218 gfc_association_list
* assoc
;
9220 assoc
= gfc_get_association_list ();
9221 assoc
->st
= code
->expr1
->symtree
;
9222 assoc
->target
= gfc_copy_expr (code
->expr2
);
9223 assoc
->target
->where
= code
->expr2
->where
;
9224 /* assoc->variable will be set by resolve_assoc_var. */
9226 code
->ext
.block
.assoc
= assoc
;
9227 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9229 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9232 code
->ext
.block
.assoc
= NULL
;
9234 /* Ensure that the selector rank and arrayspec are available to
9235 correct expressions in which they might be missing. */
9236 if (code
->expr2
&& code
->expr2
->rank
)
9238 rank
= code
->expr2
->rank
;
9239 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9240 if (ref
->next
== NULL
)
9242 if (ref
&& ref
->type
== REF_ARRAY
)
9243 ref
= gfc_copy_ref (ref
);
9245 /* Fixup expr1 if necessary. */
9247 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9249 else if (code
->expr1
->rank
)
9251 rank
= code
->expr1
->rank
;
9252 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9253 if (ref
->next
== NULL
)
9255 if (ref
&& ref
->type
== REF_ARRAY
)
9256 ref
= gfc_copy_ref (ref
);
9259 /* Add EXEC_SELECT to switch on type. */
9260 new_st
= gfc_get_code (code
->op
);
9261 new_st
->expr1
= code
->expr1
;
9262 new_st
->expr2
= code
->expr2
;
9263 new_st
->block
= code
->block
;
9264 code
->expr1
= code
->expr2
= NULL
;
9269 ns
->code
->next
= new_st
;
9271 code
->op
= EXEC_SELECT_TYPE
;
9273 /* Use the intrinsic LOC function to generate an integer expression
9274 for the vtable of the selector. Note that the rank of the selector
9275 expression has to be set to zero. */
9276 gfc_add_vptr_component (code
->expr1
);
9277 code
->expr1
->rank
= 0;
9278 code
->expr1
= build_loc_call (code
->expr1
);
9279 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9281 /* Loop over TYPE IS / CLASS IS cases. */
9282 for (body
= code
->block
; body
; body
= body
->block
)
9286 c
= body
->ext
.block
.case_list
;
9288 /* Generate an index integer expression for address of the
9289 TYPE/CLASS vtable and store it in c->low. The hash expression
9290 is stored in c->high and is used to resolve intrinsic cases. */
9291 if (c
->ts
.type
!= BT_UNKNOWN
)
9293 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9295 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9297 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9298 c
->ts
.u
.derived
->hash_value
);
9302 vtab
= gfc_find_vtab (&c
->ts
);
9303 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9304 e
= CLASS_DATA (vtab
)->initializer
;
9305 c
->high
= gfc_copy_expr (e
);
9306 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9309 ts
.kind
= gfc_integer_4_kind
;
9310 ts
.type
= BT_INTEGER
;
9311 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9315 e
= gfc_lval_expr_from_sym (vtab
);
9316 c
->low
= build_loc_call (e
);
9321 /* Associate temporary to selector. This should only be done
9322 when this case is actually true, so build a new ASSOCIATE
9323 that does precisely this here (instead of using the
9326 if (c
->ts
.type
== BT_CLASS
)
9327 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9328 else if (c
->ts
.type
== BT_DERIVED
)
9329 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9330 else if (c
->ts
.type
== BT_CHARACTER
)
9332 HOST_WIDE_INT charlen
= 0;
9333 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9334 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9335 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9336 snprintf (name
, sizeof (name
),
9337 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9338 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9341 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9344 st
= gfc_find_symtree (ns
->sym_root
, name
);
9345 gcc_assert (st
->n
.sym
->assoc
);
9346 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9347 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9348 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9350 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9351 /* Fixup the target expression if necessary. */
9353 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9356 new_st
= gfc_get_code (EXEC_BLOCK
);
9357 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9358 new_st
->ext
.block
.ns
->code
= body
->next
;
9359 body
->next
= new_st
;
9361 /* Chain in the new list only if it is marked as dangling. Otherwise
9362 there is a CASE label overlap and this is already used. Just ignore,
9363 the error is diagnosed elsewhere. */
9364 if (st
->n
.sym
->assoc
->dangling
)
9366 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9367 st
->n
.sym
->assoc
->dangling
= 0;
9370 resolve_assoc_var (st
->n
.sym
, false);
9373 /* Take out CLASS IS cases for separate treatment. */
9375 while (body
&& body
->block
)
9377 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9379 /* Add to class_is list. */
9380 if (class_is
== NULL
)
9382 class_is
= body
->block
;
9387 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9388 tail
->block
= body
->block
;
9391 /* Remove from EXEC_SELECT list. */
9392 body
->block
= body
->block
->block
;
9405 /* Add a default case to hold the CLASS IS cases. */
9406 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9407 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9409 tail
->ext
.block
.case_list
= gfc_get_case ();
9410 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9412 default_case
= tail
;
9415 /* More than one CLASS IS block? */
9416 if (class_is
->block
)
9420 /* Sort CLASS IS blocks by extension level. */
9424 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9427 /* F03:C817 (check for doubles). */
9428 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9429 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9431 gfc_error ("Double CLASS IS block in SELECT TYPE "
9433 &c2
->ext
.block
.case_list
->where
);
9436 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9437 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9440 (*c1
)->block
= c2
->block
;
9450 /* Generate IF chain. */
9451 if_st
= gfc_get_code (EXEC_IF
);
9453 for (body
= class_is
; body
; body
= body
->block
)
9455 new_st
->block
= gfc_get_code (EXEC_IF
);
9456 new_st
= new_st
->block
;
9457 /* Set up IF condition: Call _gfortran_is_extension_of. */
9458 new_st
->expr1
= gfc_get_expr ();
9459 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9460 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9461 new_st
->expr1
->ts
.kind
= 4;
9462 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9463 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9464 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9465 /* Set up arguments. */
9466 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9467 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9468 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9469 new_st
->expr1
->where
= code
->loc
;
9470 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9471 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9472 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9473 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9474 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9475 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9476 new_st
->next
= body
->next
;
9478 if (default_case
->next
)
9480 new_st
->block
= gfc_get_code (EXEC_IF
);
9481 new_st
= new_st
->block
;
9482 new_st
->next
= default_case
->next
;
9485 /* Replace CLASS DEFAULT code by the IF chain. */
9486 default_case
->next
= if_st
;
9489 /* Resolve the internal code. This cannot be done earlier because
9490 it requires that the sym->assoc of selectors is set already. */
9491 gfc_current_ns
= ns
;
9492 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9493 gfc_current_ns
= old_ns
;
9500 /* Resolve a SELECT RANK statement. */
9503 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9506 gfc_code
*body
, *new_st
, *tail
;
9508 char tname
[GFC_MAX_SYMBOL_LEN
];
9509 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9511 gfc_expr
*selector_expr
= NULL
;
9513 HOST_WIDE_INT charlen
= 0;
9515 ns
= code
->ext
.block
.ns
;
9518 code
->op
= EXEC_BLOCK
;
9521 gfc_association_list
* assoc
;
9523 assoc
= gfc_get_association_list ();
9524 assoc
->st
= code
->expr1
->symtree
;
9525 assoc
->target
= gfc_copy_expr (code
->expr2
);
9526 assoc
->target
->where
= code
->expr2
->where
;
9527 /* assoc->variable will be set by resolve_assoc_var. */
9529 code
->ext
.block
.assoc
= assoc
;
9530 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9532 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9535 code
->ext
.block
.assoc
= NULL
;
9537 /* Loop over RANK cases. Note that returning on the errors causes a
9538 cascade of further errors because the case blocks do not compile
9540 for (body
= code
->block
; body
; body
= body
->block
)
9542 c
= body
->ext
.block
.case_list
;
9544 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9548 /* Check for repeated cases. */
9549 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9551 gfc_case
*d
= tail
->ext
.block
.case_list
;
9557 /* Check F2018: C1153. */
9558 if (!c
->low
&& !d
->low
)
9559 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9560 &c
->where
, &d
->where
);
9562 if (!c
->low
|| !d
->low
)
9565 /* Check F2018: C1153. */
9566 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9567 if ((case_value
== case_value2
) && case_value
== -1)
9568 gfc_error ("RANK (*) at %L is repeated at %L",
9569 &c
->where
, &d
->where
);
9570 else if (case_value
== case_value2
)
9571 gfc_error ("RANK (%i) at %L is repeated at %L",
9572 case_value
, &c
->where
, &d
->where
);
9578 /* Check F2018: C1155. */
9579 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9580 || gfc_expr_attr (code
->expr1
).pointer
))
9581 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9582 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9584 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9585 || gfc_expr_attr (code
->expr1
).pointer
))
9586 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9587 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9590 /* Add EXEC_SELECT to switch on rank. */
9591 new_st
= gfc_get_code (code
->op
);
9592 new_st
->expr1
= code
->expr1
;
9593 new_st
->expr2
= code
->expr2
;
9594 new_st
->block
= code
->block
;
9595 code
->expr1
= code
->expr2
= NULL
;
9600 ns
->code
->next
= new_st
;
9602 code
->op
= EXEC_SELECT_RANK
;
9604 selector_expr
= code
->expr1
;
9606 /* Loop over SELECT RANK cases. */
9607 for (body
= code
->block
; body
; body
= body
->block
)
9609 c
= body
->ext
.block
.case_list
;
9612 /* Pass on the default case. */
9616 /* Associate temporary to selector. This should only be done
9617 when this case is actually true, so build a new ASSOCIATE
9618 that does precisely this here (instead of using the
9620 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9621 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9622 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9624 if (c
->ts
.type
== BT_CLASS
)
9625 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9626 else if (c
->ts
.type
== BT_DERIVED
)
9627 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9628 else if (c
->ts
.type
!= BT_CHARACTER
)
9629 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9631 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9632 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9634 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9635 if (case_value
>= 0)
9636 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9638 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9640 st
= gfc_find_symtree (ns
->sym_root
, name
);
9641 gcc_assert (st
->n
.sym
->assoc
);
9643 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9644 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9646 new_st
= gfc_get_code (EXEC_BLOCK
);
9647 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9648 new_st
->ext
.block
.ns
->code
= body
->next
;
9649 body
->next
= new_st
;
9651 /* Chain in the new list only if it is marked as dangling. Otherwise
9652 there is a CASE label overlap and this is already used. Just ignore,
9653 the error is diagnosed elsewhere. */
9654 if (st
->n
.sym
->assoc
->dangling
)
9656 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9657 st
->n
.sym
->assoc
->dangling
= 0;
9660 resolve_assoc_var (st
->n
.sym
, false);
9663 gfc_current_ns
= ns
;
9664 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9665 gfc_current_ns
= old_ns
;
9669 /* Resolve a transfer statement. This is making sure that:
9670 -- a derived type being transferred has only non-pointer components
9671 -- a derived type being transferred doesn't have private components, unless
9672 it's being transferred from the module where the type was defined
9673 -- we're not trying to transfer a whole assumed size array. */
9676 resolve_transfer (gfc_code
*code
)
9678 gfc_symbol
*sym
, *derived
;
9682 bool formatted
= false;
9683 gfc_dt
*dt
= code
->ext
.dt
;
9684 gfc_symbol
*dtio_sub
= NULL
;
9688 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9689 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9690 exp
= exp
->value
.op
.op1
;
9692 if (exp
&& exp
->expr_type
== EXPR_NULL
9695 gfc_error ("Invalid context for NULL () intrinsic at %L",
9700 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9701 && exp
->expr_type
!= EXPR_FUNCTION
9702 && exp
->expr_type
!= EXPR_STRUCTURE
))
9705 /* If we are reading, the variable will be changed. Note that
9706 code->ext.dt may be NULL if the TRANSFER is related to
9707 an INQUIRE statement -- but in this case, we are not reading, either. */
9708 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9709 && !gfc_check_vardef_context (exp
, false, false, false,
9713 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9714 || exp
->expr_type
== EXPR_FUNCTION
9715 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9717 /* Go to actual component transferred. */
9718 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9719 if (ref
->type
== REF_COMPONENT
)
9720 ts
= &ref
->u
.c
.component
->ts
;
9722 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9723 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9725 derived
= ts
->u
.derived
;
9727 /* Determine when to use the formatted DTIO procedure. */
9728 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9731 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9732 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9733 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9735 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9738 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9739 /* Check to see if this is a nested DTIO call, with the
9740 dummy as the io-list object. */
9741 if (sym
&& sym
== dtio_sub
&& sym
->formal
9742 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9743 && exp
->ref
== NULL
)
9745 if (!sym
->attr
.recursive
)
9747 gfc_error ("DTIO %s procedure at %L must be recursive",
9748 sym
->name
, &sym
->declared_at
);
9755 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9757 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9758 "it is processed by a defined input/output procedure",
9763 if (ts
->type
== BT_DERIVED
)
9765 /* Check that transferred derived type doesn't contain POINTER
9766 components unless it is processed by a defined input/output
9768 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9770 gfc_error ("Data transfer element at %L cannot have POINTER "
9771 "components unless it is processed by a defined "
9772 "input/output procedure", &code
->loc
);
9777 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9779 gfc_error ("Data transfer element at %L cannot have "
9780 "procedure pointer components", &code
->loc
);
9784 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9786 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9787 "components unless it is processed by a defined "
9788 "input/output procedure", &code
->loc
);
9792 /* C_PTR and C_FUNPTR have private components which means they cannot
9793 be printed. However, if -std=gnu and not -pedantic, allow
9794 the component to be printed to help debugging. */
9795 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9797 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9798 "cannot have PRIVATE components", &code
->loc
))
9801 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9803 gfc_error ("Data transfer element at %L cannot have "
9804 "PRIVATE components unless it is processed by "
9805 "a defined input/output procedure", &code
->loc
);
9810 if (exp
->expr_type
== EXPR_STRUCTURE
)
9813 sym
= exp
->symtree
->n
.sym
;
9815 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9816 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9818 gfc_error ("Data transfer element at %L cannot be a full reference to "
9819 "an assumed-size array", &code
->loc
);
9823 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9824 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9828 /*********** Toplevel code resolution subroutines ***********/
9830 /* Find the set of labels that are reachable from this block. We also
9831 record the last statement in each block. */
9834 find_reachable_labels (gfc_code
*block
)
9841 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9843 /* Collect labels in this block. We don't keep those corresponding
9844 to END {IF|SELECT}, these are checked in resolve_branch by going
9845 up through the code_stack. */
9846 for (c
= block
; c
; c
= c
->next
)
9848 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9849 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9852 /* Merge with labels from parent block. */
9855 gcc_assert (cs_base
->prev
->reachable_labels
);
9856 bitmap_ior_into (cs_base
->reachable_labels
,
9857 cs_base
->prev
->reachable_labels
);
9863 resolve_lock_unlock_event (gfc_code
*code
)
9865 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9866 && code
->expr1
->value
.function
.isym
9867 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9868 remove_caf_get_intrinsic (code
->expr1
);
9870 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9871 && (code
->expr1
->ts
.type
!= BT_DERIVED
9872 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9873 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9874 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9875 || code
->expr1
->rank
!= 0
9876 || (!gfc_is_coarray (code
->expr1
) &&
9877 !gfc_is_coindexed (code
->expr1
))))
9878 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9879 &code
->expr1
->where
);
9880 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9881 && (code
->expr1
->ts
.type
!= BT_DERIVED
9882 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9883 || code
->expr1
->ts
.u
.derived
->from_intmod
9884 != INTMOD_ISO_FORTRAN_ENV
9885 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9886 != ISOFORTRAN_EVENT_TYPE
9887 || code
->expr1
->rank
!= 0))
9888 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9889 &code
->expr1
->where
);
9890 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9891 && !gfc_is_coindexed (code
->expr1
))
9892 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9893 &code
->expr1
->where
);
9894 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9895 gfc_error ("Event variable argument at %L must be a coarray but not "
9896 "coindexed", &code
->expr1
->where
);
9900 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9901 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9902 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9903 &code
->expr2
->where
);
9906 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9907 _("STAT variable")))
9912 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9913 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9914 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9915 &code
->expr3
->where
);
9918 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9919 _("ERRMSG variable")))
9922 /* Check for LOCK the ACQUIRED_LOCK. */
9923 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9924 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9925 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9926 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9927 "variable", &code
->expr4
->where
);
9929 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9930 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9931 _("ACQUIRED_LOCK variable")))
9934 /* Check for EVENT WAIT the UNTIL_COUNT. */
9935 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9937 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9938 || code
->expr4
->rank
!= 0)
9939 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9940 "expression", &code
->expr4
->where
);
9946 resolve_critical (gfc_code
*code
)
9948 gfc_symtree
*symtree
;
9949 gfc_symbol
*lock_type
;
9950 char name
[GFC_MAX_SYMBOL_LEN
];
9951 static int serial
= 0;
9953 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9956 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9957 GFC_PREFIX ("lock_type"));
9959 lock_type
= symtree
->n
.sym
;
9962 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9965 lock_type
= symtree
->n
.sym
;
9966 lock_type
->attr
.flavor
= FL_DERIVED
;
9967 lock_type
->attr
.zero_comp
= 1;
9968 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9969 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9972 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9973 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9976 code
->resolved_sym
= symtree
->n
.sym
;
9977 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9978 symtree
->n
.sym
->attr
.referenced
= 1;
9979 symtree
->n
.sym
->attr
.artificial
= 1;
9980 symtree
->n
.sym
->attr
.codimension
= 1;
9981 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9982 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9983 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9984 symtree
->n
.sym
->as
->corank
= 1;
9985 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9986 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9987 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9989 gfc_commit_symbols();
9994 resolve_sync (gfc_code
*code
)
9996 /* Check imageset. The * case matches expr1 == NULL. */
9999 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10000 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10001 "INTEGER expression", &code
->expr1
->where
);
10002 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10003 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10004 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10005 &code
->expr1
->where
);
10006 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10007 && gfc_simplify_expr (code
->expr1
, 0))
10009 gfc_constructor
*cons
;
10010 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10011 for (; cons
; cons
= gfc_constructor_next (cons
))
10012 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10013 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10014 gfc_error ("Imageset argument at %L must between 1 and "
10015 "num_images()", &cons
->expr
->where
);
10020 gfc_resolve_expr (code
->expr2
);
10022 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10023 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10024 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10025 &code
->expr2
->where
);
10027 /* Check ERRMSG. */
10028 gfc_resolve_expr (code
->expr3
);
10030 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10031 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10032 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10033 &code
->expr3
->where
);
10037 /* Given a branch to a label, see if the branch is conforming.
10038 The code node describes where the branch is located. */
10041 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10048 /* Step one: is this a valid branching target? */
10050 if (label
->defined
== ST_LABEL_UNKNOWN
)
10052 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10057 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10059 gfc_error ("Statement at %L is not a valid branch target statement "
10060 "for the branch statement at %L", &label
->where
, &code
->loc
);
10064 /* Step two: make sure this branch is not a branch to itself ;-) */
10066 if (code
->here
== label
)
10069 "Branch at %L may result in an infinite loop", &code
->loc
);
10073 /* Step three: See if the label is in the same block as the
10074 branching statement. The hard work has been done by setting up
10075 the bitmap reachable_labels. */
10077 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10079 /* Check now whether there is a CRITICAL construct; if so, check
10080 whether the label is still visible outside of the CRITICAL block,
10081 which is invalid. */
10082 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10084 if (stack
->current
->op
== EXEC_CRITICAL
10085 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10086 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10087 "label at %L", &code
->loc
, &label
->where
);
10088 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10089 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10090 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10091 "for label at %L", &code
->loc
, &label
->where
);
10097 /* Step four: If we haven't found the label in the bitmap, it may
10098 still be the label of the END of the enclosing block, in which
10099 case we find it by going up the code_stack. */
10101 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10103 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10105 if (stack
->current
->op
== EXEC_CRITICAL
)
10107 /* Note: A label at END CRITICAL does not leave the CRITICAL
10108 construct as END CRITICAL is still part of it. */
10109 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10110 " at %L", &code
->loc
, &label
->where
);
10113 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10115 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10116 "label at %L", &code
->loc
, &label
->where
);
10123 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10127 /* The label is not in an enclosing block, so illegal. This was
10128 allowed in Fortran 66, so we allow it as extension. No
10129 further checks are necessary in this case. */
10130 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10131 "as the GOTO statement at %L", &label
->where
,
10137 /* Check whether EXPR1 has the same shape as EXPR2. */
10140 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10142 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10143 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10144 bool result
= false;
10147 /* Compare the rank. */
10148 if (expr1
->rank
!= expr2
->rank
)
10151 /* Compare the size of each dimension. */
10152 for (i
=0; i
<expr1
->rank
; i
++)
10154 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10157 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10160 if (mpz_cmp (shape
[i
], shape2
[i
]))
10164 /* When either of the two expression is an assumed size array, we
10165 ignore the comparison of dimension sizes. */
10170 gfc_clear_shape (shape
, i
);
10171 gfc_clear_shape (shape2
, i
);
10176 /* Check whether a WHERE assignment target or a WHERE mask expression
10177 has the same shape as the outmost WHERE mask expression. */
10180 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10184 gfc_expr
*e
= NULL
;
10186 cblock
= code
->block
;
10188 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10189 In case of nested WHERE, only the outmost one is stored. */
10190 if (mask
== NULL
) /* outmost WHERE */
10192 else /* inner WHERE */
10199 /* Check if the mask-expr has a consistent shape with the
10200 outmost WHERE mask-expr. */
10201 if (!resolve_where_shape (cblock
->expr1
, e
))
10202 gfc_error ("WHERE mask at %L has inconsistent shape",
10203 &cblock
->expr1
->where
);
10206 /* the assignment statement of a WHERE statement, or the first
10207 statement in where-body-construct of a WHERE construct */
10208 cnext
= cblock
->next
;
10213 /* WHERE assignment statement */
10216 /* Check shape consistent for WHERE assignment target. */
10217 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10218 gfc_error ("WHERE assignment target at %L has "
10219 "inconsistent shape", &cnext
->expr1
->where
);
10223 case EXEC_ASSIGN_CALL
:
10224 resolve_call (cnext
);
10225 if (!cnext
->resolved_sym
->attr
.elemental
)
10226 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10227 &cnext
->ext
.actual
->expr
->where
);
10230 /* WHERE or WHERE construct is part of a where-body-construct */
10232 resolve_where (cnext
, e
);
10236 gfc_error ("Unsupported statement inside WHERE at %L",
10239 /* the next statement within the same where-body-construct */
10240 cnext
= cnext
->next
;
10242 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10243 cblock
= cblock
->block
;
10248 /* Resolve assignment in FORALL construct.
10249 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10250 FORALL index variables. */
10253 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10257 for (n
= 0; n
< nvar
; n
++)
10259 gfc_symbol
*forall_index
;
10261 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10263 /* Check whether the assignment target is one of the FORALL index
10265 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10266 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10267 gfc_error ("Assignment to a FORALL index variable at %L",
10268 &code
->expr1
->where
);
10271 /* If one of the FORALL index variables doesn't appear in the
10272 assignment variable, then there could be a many-to-one
10273 assignment. Emit a warning rather than an error because the
10274 mask could be resolving this problem. */
10275 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10276 gfc_warning (0, "The FORALL with index %qs is not used on the "
10277 "left side of the assignment at %L and so might "
10278 "cause multiple assignment to this object",
10279 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10285 /* Resolve WHERE statement in FORALL construct. */
10288 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10289 gfc_expr
**var_expr
)
10294 cblock
= code
->block
;
10297 /* the assignment statement of a WHERE statement, or the first
10298 statement in where-body-construct of a WHERE construct */
10299 cnext
= cblock
->next
;
10304 /* WHERE assignment statement */
10306 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10309 /* WHERE operator assignment statement */
10310 case EXEC_ASSIGN_CALL
:
10311 resolve_call (cnext
);
10312 if (!cnext
->resolved_sym
->attr
.elemental
)
10313 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10314 &cnext
->ext
.actual
->expr
->where
);
10317 /* WHERE or WHERE construct is part of a where-body-construct */
10319 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10323 gfc_error ("Unsupported statement inside WHERE at %L",
10326 /* the next statement within the same where-body-construct */
10327 cnext
= cnext
->next
;
10329 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10330 cblock
= cblock
->block
;
10335 /* Traverse the FORALL body to check whether the following errors exist:
10336 1. For assignment, check if a many-to-one assignment happens.
10337 2. For WHERE statement, check the WHERE body to see if there is any
10338 many-to-one assignment. */
10341 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10345 c
= code
->block
->next
;
10351 case EXEC_POINTER_ASSIGN
:
10352 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10355 case EXEC_ASSIGN_CALL
:
10359 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10360 there is no need to handle it here. */
10364 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10369 /* The next statement in the FORALL body. */
10375 /* Counts the number of iterators needed inside a forall construct, including
10376 nested forall constructs. This is used to allocate the needed memory
10377 in gfc_resolve_forall. */
10380 gfc_count_forall_iterators (gfc_code
*code
)
10382 int max_iters
, sub_iters
, current_iters
;
10383 gfc_forall_iterator
*fa
;
10385 gcc_assert(code
->op
== EXEC_FORALL
);
10389 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10392 code
= code
->block
->next
;
10396 if (code
->op
== EXEC_FORALL
)
10398 sub_iters
= gfc_count_forall_iterators (code
);
10399 if (sub_iters
> max_iters
)
10400 max_iters
= sub_iters
;
10405 return current_iters
+ max_iters
;
10409 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10410 gfc_resolve_forall_body to resolve the FORALL body. */
10413 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10415 static gfc_expr
**var_expr
;
10416 static int total_var
= 0;
10417 static int nvar
= 0;
10418 int i
, old_nvar
, tmp
;
10419 gfc_forall_iterator
*fa
;
10423 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10426 /* Start to resolve a FORALL construct */
10427 if (forall_save
== 0)
10429 /* Count the total number of FORALL indices in the nested FORALL
10430 construct in order to allocate the VAR_EXPR with proper size. */
10431 total_var
= gfc_count_forall_iterators (code
);
10433 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10434 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10437 /* The information about FORALL iterator, including FORALL indices start, end
10438 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10439 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10441 /* Fortran 20008: C738 (R753). */
10442 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10444 gfc_error ("FORALL index-name at %L must be a scalar variable "
10445 "of type integer", &fa
->var
->where
);
10449 /* Check if any outer FORALL index name is the same as the current
10451 for (i
= 0; i
< nvar
; i
++)
10453 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10454 gfc_error ("An outer FORALL construct already has an index "
10455 "with this name %L", &fa
->var
->where
);
10458 /* Record the current FORALL index. */
10459 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10463 /* No memory leak. */
10464 gcc_assert (nvar
<= total_var
);
10467 /* Resolve the FORALL body. */
10468 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10470 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10471 gfc_resolve_blocks (code
->block
, ns
);
10475 /* Free only the VAR_EXPRs allocated in this frame. */
10476 for (i
= nvar
; i
< tmp
; i
++)
10477 gfc_free_expr (var_expr
[i
]);
10481 /* We are in the outermost FORALL construct. */
10482 gcc_assert (forall_save
== 0);
10484 /* VAR_EXPR is not needed any more. */
10491 /* Resolve a BLOCK construct statement. */
10494 resolve_block_construct (gfc_code
* code
)
10496 /* Resolve the BLOCK's namespace. */
10497 gfc_resolve (code
->ext
.block
.ns
);
10499 /* For an ASSOCIATE block, the associations (and their targets) are already
10500 resolved during resolve_symbol. */
10504 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10508 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10512 for (; b
; b
= b
->block
)
10514 t
= gfc_resolve_expr (b
->expr1
);
10515 if (!gfc_resolve_expr (b
->expr2
))
10521 if (t
&& b
->expr1
!= NULL
10522 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10523 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10529 && b
->expr1
!= NULL
10530 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10531 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10536 resolve_branch (b
->label1
, b
);
10540 resolve_block_construct (b
);
10544 case EXEC_SELECT_TYPE
:
10545 case EXEC_SELECT_RANK
:
10548 case EXEC_DO_WHILE
:
10549 case EXEC_DO_CONCURRENT
:
10550 case EXEC_CRITICAL
:
10553 case EXEC_IOLENGTH
:
10557 case EXEC_OMP_ATOMIC
:
10558 case EXEC_OACC_ATOMIC
:
10560 gfc_omp_atomic_op aop
10561 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10563 /* Verify this before calling gfc_resolve_code, which might
10565 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10566 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10567 && b
->next
->next
== NULL
)
10568 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10569 && b
->next
->next
!= NULL
10570 && b
->next
->next
->op
== EXEC_ASSIGN
10571 && b
->next
->next
->next
== NULL
));
10575 case EXEC_OACC_PARALLEL_LOOP
:
10576 case EXEC_OACC_PARALLEL
:
10577 case EXEC_OACC_KERNELS_LOOP
:
10578 case EXEC_OACC_KERNELS
:
10579 case EXEC_OACC_DATA
:
10580 case EXEC_OACC_HOST_DATA
:
10581 case EXEC_OACC_LOOP
:
10582 case EXEC_OACC_UPDATE
:
10583 case EXEC_OACC_WAIT
:
10584 case EXEC_OACC_CACHE
:
10585 case EXEC_OACC_ENTER_DATA
:
10586 case EXEC_OACC_EXIT_DATA
:
10587 case EXEC_OACC_ROUTINE
:
10588 case EXEC_OMP_CRITICAL
:
10589 case EXEC_OMP_DISTRIBUTE
:
10590 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10591 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10592 case EXEC_OMP_DISTRIBUTE_SIMD
:
10594 case EXEC_OMP_DO_SIMD
:
10595 case EXEC_OMP_MASTER
:
10596 case EXEC_OMP_ORDERED
:
10597 case EXEC_OMP_PARALLEL
:
10598 case EXEC_OMP_PARALLEL_DO
:
10599 case EXEC_OMP_PARALLEL_DO_SIMD
:
10600 case EXEC_OMP_PARALLEL_SECTIONS
:
10601 case EXEC_OMP_PARALLEL_WORKSHARE
:
10602 case EXEC_OMP_SECTIONS
:
10603 case EXEC_OMP_SIMD
:
10604 case EXEC_OMP_SINGLE
:
10605 case EXEC_OMP_TARGET
:
10606 case EXEC_OMP_TARGET_DATA
:
10607 case EXEC_OMP_TARGET_ENTER_DATA
:
10608 case EXEC_OMP_TARGET_EXIT_DATA
:
10609 case EXEC_OMP_TARGET_PARALLEL
:
10610 case EXEC_OMP_TARGET_PARALLEL_DO
:
10611 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10612 case EXEC_OMP_TARGET_SIMD
:
10613 case EXEC_OMP_TARGET_TEAMS
:
10614 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10615 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10616 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10617 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10618 case EXEC_OMP_TARGET_UPDATE
:
10619 case EXEC_OMP_TASK
:
10620 case EXEC_OMP_TASKGROUP
:
10621 case EXEC_OMP_TASKLOOP
:
10622 case EXEC_OMP_TASKLOOP_SIMD
:
10623 case EXEC_OMP_TASKWAIT
:
10624 case EXEC_OMP_TASKYIELD
:
10625 case EXEC_OMP_TEAMS
:
10626 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10627 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10628 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10629 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10630 case EXEC_OMP_WORKSHARE
:
10634 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10637 gfc_resolve_code (b
->next
, ns
);
10642 /* Does everything to resolve an ordinary assignment. Returns true
10643 if this is an interface assignment. */
10645 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10652 symbol_attribute attr
;
10654 if (gfc_extend_assign (code
, ns
))
10658 if (code
->op
== EXEC_ASSIGN_CALL
)
10660 lhs
= code
->ext
.actual
->expr
;
10661 rhsptr
= &code
->ext
.actual
->next
->expr
;
10665 gfc_actual_arglist
* args
;
10666 gfc_typebound_proc
* tbp
;
10668 gcc_assert (code
->op
== EXEC_COMPCALL
);
10670 args
= code
->expr1
->value
.compcall
.actual
;
10672 rhsptr
= &args
->next
->expr
;
10674 tbp
= code
->expr1
->value
.compcall
.tbp
;
10675 gcc_assert (!tbp
->is_generic
);
10678 /* Make a temporary rhs when there is a default initializer
10679 and rhs is the same symbol as the lhs. */
10680 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10681 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10682 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10683 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10684 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10692 /* Handle the case of a BOZ literal on the RHS. */
10693 if (rhs
->ts
.type
== BT_BOZ
)
10695 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10696 "statement value nor an actual argument of "
10697 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10701 switch (lhs
->ts
.type
)
10704 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10708 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10712 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10717 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10719 HOST_WIDE_INT llen
= 0, rlen
= 0;
10720 if (lhs
->ts
.u
.cl
!= NULL
10721 && lhs
->ts
.u
.cl
->length
!= NULL
10722 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10723 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10725 if (rhs
->expr_type
== EXPR_CONSTANT
)
10726 rlen
= rhs
->value
.character
.length
;
10728 else if (rhs
->ts
.u
.cl
!= NULL
10729 && rhs
->ts
.u
.cl
->length
!= NULL
10730 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10731 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10733 if (rlen
&& llen
&& rlen
> llen
)
10734 gfc_warning_now (OPT_Wcharacter_truncation
,
10735 "CHARACTER expression will be truncated "
10736 "in assignment (%ld/%ld) at %L",
10737 (long) llen
, (long) rlen
, &code
->loc
);
10740 /* Ensure that a vector index expression for the lvalue is evaluated
10741 to a temporary if the lvalue symbol is referenced in it. */
10744 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10745 if (ref
->type
== REF_ARRAY
)
10747 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10748 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10749 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10750 ref
->u
.ar
.start
[n
]))
10752 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10756 if (gfc_pure (NULL
))
10758 if (lhs
->ts
.type
== BT_DERIVED
10759 && lhs
->expr_type
== EXPR_VARIABLE
10760 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10761 && rhs
->expr_type
== EXPR_VARIABLE
10762 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10763 || gfc_is_coindexed (rhs
)))
10765 /* F2008, C1283. */
10766 if (gfc_is_coindexed (rhs
))
10767 gfc_error ("Coindexed expression at %L is assigned to "
10768 "a derived type variable with a POINTER "
10769 "component in a PURE procedure",
10772 gfc_error ("The impure variable at %L is assigned to "
10773 "a derived type variable with a POINTER "
10774 "component in a PURE procedure (12.6)",
10779 /* Fortran 2008, C1283. */
10780 if (gfc_is_coindexed (lhs
))
10782 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10783 "procedure", &rhs
->where
);
10788 if (gfc_implicit_pure (NULL
))
10790 if (lhs
->expr_type
== EXPR_VARIABLE
10791 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10792 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10793 gfc_unset_implicit_pure (NULL
);
10795 if (lhs
->ts
.type
== BT_DERIVED
10796 && lhs
->expr_type
== EXPR_VARIABLE
10797 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10798 && rhs
->expr_type
== EXPR_VARIABLE
10799 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10800 || gfc_is_coindexed (rhs
)))
10801 gfc_unset_implicit_pure (NULL
);
10803 /* Fortran 2008, C1283. */
10804 if (gfc_is_coindexed (lhs
))
10805 gfc_unset_implicit_pure (NULL
);
10808 /* F2008, 7.2.1.2. */
10809 attr
= gfc_expr_attr (lhs
);
10810 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10812 if (attr
.codimension
)
10814 gfc_error ("Assignment to polymorphic coarray at %L is not "
10815 "permitted", &lhs
->where
);
10818 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10819 "polymorphic variable at %L", &lhs
->where
))
10821 if (!flag_realloc_lhs
)
10823 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10824 "requires %<-frealloc-lhs%>", &lhs
->where
);
10828 else if (lhs
->ts
.type
== BT_CLASS
)
10830 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10831 "assignment at %L - check that there is a matching specific "
10832 "subroutine for '=' operator", &lhs
->where
);
10836 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10838 /* F2008, Section 7.2.1.2. */
10839 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10841 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10842 "component in assignment at %L", &lhs
->where
);
10846 /* Assign the 'data' of a class object to a derived type. */
10847 if (lhs
->ts
.type
== BT_DERIVED
10848 && rhs
->ts
.type
== BT_CLASS
10849 && rhs
->expr_type
!= EXPR_ARRAY
)
10850 gfc_add_data_component (rhs
);
10852 /* Make sure there is a vtable and, in particular, a _copy for the
10854 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10855 gfc_find_vtab (&rhs
->ts
);
10857 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10859 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10860 && code
->expr2
->value
.function
.isym
10861 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10862 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10863 && !gfc_expr_attr (rhs
).allocatable
10864 && !gfc_has_vector_subscript (rhs
)));
10866 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10868 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10869 Additionally, insert this code when the RHS is a CAF as we then use the
10870 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10871 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10872 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10874 if (caf_convert_to_send
)
10876 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10877 && code
->expr2
->value
.function
.isym
10878 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10879 remove_caf_get_intrinsic (code
->expr2
);
10880 code
->op
= EXEC_CALL
;
10881 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10882 code
->resolved_sym
= code
->symtree
->n
.sym
;
10883 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10884 code
->resolved_sym
->attr
.intrinsic
= 1;
10885 code
->resolved_sym
->attr
.subroutine
= 1;
10886 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10887 gfc_commit_symbol (code
->resolved_sym
);
10888 code
->ext
.actual
= gfc_get_actual_arglist ();
10889 code
->ext
.actual
->expr
= lhs
;
10890 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10891 code
->ext
.actual
->next
->expr
= rhs
;
10892 code
->expr1
= NULL
;
10893 code
->expr2
= NULL
;
10900 /* Add a component reference onto an expression. */
10903 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10908 ref
= &((*ref
)->next
);
10909 *ref
= gfc_get_ref ();
10910 (*ref
)->type
= REF_COMPONENT
;
10911 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10912 (*ref
)->u
.c
.component
= c
;
10915 /* Add a full array ref, as necessary. */
10918 gfc_add_full_array_ref (e
, c
->as
);
10919 e
->rank
= c
->as
->rank
;
10924 /* Build an assignment. Keep the argument 'op' for future use, so that
10925 pointer assignments can be made. */
10928 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10929 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10931 gfc_code
*this_code
;
10933 this_code
= gfc_get_code (op
);
10934 this_code
->next
= NULL
;
10935 this_code
->expr1
= gfc_copy_expr (expr1
);
10936 this_code
->expr2
= gfc_copy_expr (expr2
);
10937 this_code
->loc
= loc
;
10938 if (comp1
&& comp2
)
10940 add_comp_ref (this_code
->expr1
, comp1
);
10941 add_comp_ref (this_code
->expr2
, comp2
);
10948 /* Makes a temporary variable expression based on the characteristics of
10949 a given variable expression. */
10952 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10954 static int serial
= 0;
10955 char name
[GFC_MAX_SYMBOL_LEN
];
10957 gfc_array_spec
*as
;
10958 gfc_array_ref
*aref
;
10961 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10962 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10963 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10965 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10966 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10968 e
->value
.character
.length
);
10974 /* Obtain the arrayspec for the temporary. */
10975 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10976 && e
->expr_type
!= EXPR_FUNCTION
10977 && e
->expr_type
!= EXPR_OP
)
10979 aref
= gfc_find_array_ref (e
);
10980 if (e
->expr_type
== EXPR_VARIABLE
10981 && e
->symtree
->n
.sym
->as
== aref
->as
)
10985 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10986 if (ref
->type
== REF_COMPONENT
10987 && ref
->u
.c
.component
->as
== aref
->as
)
10995 /* Add the attributes and the arrayspec to the temporary. */
10996 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10997 tmp
->n
.sym
->attr
.function
= 0;
10998 tmp
->n
.sym
->attr
.result
= 0;
10999 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11000 tmp
->n
.sym
->attr
.dummy
= 0;
11001 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11005 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11008 if (as
->type
== AS_DEFERRED
)
11009 tmp
->n
.sym
->attr
.allocatable
= 1;
11011 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11012 || e
->expr_type
== EXPR_FUNCTION
11013 || e
->expr_type
== EXPR_OP
))
11015 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11016 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11017 tmp
->n
.sym
->as
->rank
= e
->rank
;
11018 tmp
->n
.sym
->attr
.allocatable
= 1;
11019 tmp
->n
.sym
->attr
.dimension
= 1;
11022 tmp
->n
.sym
->attr
.dimension
= 0;
11024 gfc_set_sym_referenced (tmp
->n
.sym
);
11025 gfc_commit_symbol (tmp
->n
.sym
);
11026 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11028 /* Should the lhs be a section, use its array ref for the
11029 temporary expression. */
11030 if (aref
&& aref
->type
!= AR_FULL
)
11032 gfc_free_ref_list (e
->ref
);
11033 e
->ref
= gfc_copy_ref (ref
);
11039 /* Add one line of code to the code chain, making sure that 'head' and
11040 'tail' are appropriately updated. */
11043 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11045 gcc_assert (this_code
);
11047 *head
= *tail
= *this_code
;
11049 *tail
= gfc_append_code (*tail
, *this_code
);
11054 /* Counts the potential number of part array references that would
11055 result from resolution of typebound defined assignments. */
11058 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11061 int c_depth
= 0, t_depth
;
11063 for (c
= derived
->components
; c
; c
= c
->next
)
11065 if ((!gfc_bt_struct (c
->ts
.type
)
11067 || c
->attr
.allocatable
11068 || c
->attr
.proc_pointer_comp
11069 || c
->attr
.class_pointer
11070 || c
->attr
.proc_pointer
)
11071 && !c
->attr
.defined_assign_comp
)
11074 if (c
->as
&& c_depth
== 0)
11077 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11078 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11083 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11085 return depth
+ c_depth
;
11089 /* Implement 7.2.1.3 of the F08 standard:
11090 "An intrinsic assignment where the variable is of derived type is
11091 performed as if each component of the variable were assigned from the
11092 corresponding component of expr using pointer assignment (7.2.2) for
11093 each pointer component, defined assignment for each nonpointer
11094 nonallocatable component of a type that has a type-bound defined
11095 assignment consistent with the component, intrinsic assignment for
11096 each other nonpointer nonallocatable component, ..."
11098 The pointer assignments are taken care of by the intrinsic
11099 assignment of the structure itself. This function recursively adds
11100 defined assignments where required. The recursion is accomplished
11101 by calling gfc_resolve_code.
11103 When the lhs in a defined assignment has intent INOUT, we need a
11104 temporary for the lhs. In pseudo-code:
11106 ! Only call function lhs once.
11107 if (lhs is not a constant or an variable)
11110 ! Do the intrinsic assignment
11112 ! Now do the defined assignments
11113 do over components with typebound defined assignment [%cmp]
11114 #if one component's assignment procedure is INOUT
11116 #if expr2 non-variable
11122 t1%cmp {defined=} expr2%cmp
11128 expr1%cmp {defined=} expr2%cmp
11132 /* The temporary assignments have to be put on top of the additional
11133 code to avoid the result being changed by the intrinsic assignment.
11135 static int component_assignment_level
= 0;
11136 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11139 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11141 gfc_component
*comp1
, *comp2
;
11142 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11144 int error_count
, depth
;
11146 gfc_get_errors (NULL
, &error_count
);
11148 /* Filter out continuing processing after an error. */
11150 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11151 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11154 /* TODO: Handle more than one part array reference in assignments. */
11155 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11156 (*code
)->expr1
->rank
? 1 : 0);
11159 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11160 "done because multiple part array references would "
11161 "occur in intermediate expressions.", &(*code
)->loc
);
11165 component_assignment_level
++;
11167 /* Create a temporary so that functions get called only once. */
11168 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11169 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11171 gfc_expr
*tmp_expr
;
11173 /* Assign the rhs to the temporary. */
11174 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11175 this_code
= build_assignment (EXEC_ASSIGN
,
11176 tmp_expr
, (*code
)->expr2
,
11177 NULL
, NULL
, (*code
)->loc
);
11178 /* Add the code and substitute the rhs expression. */
11179 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11180 gfc_free_expr ((*code
)->expr2
);
11181 (*code
)->expr2
= tmp_expr
;
11184 /* Do the intrinsic assignment. This is not needed if the lhs is one
11185 of the temporaries generated here, since the intrinsic assignment
11186 to the final result already does this. */
11187 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11189 this_code
= build_assignment (EXEC_ASSIGN
,
11190 (*code
)->expr1
, (*code
)->expr2
,
11191 NULL
, NULL
, (*code
)->loc
);
11192 add_code_to_chain (&this_code
, &head
, &tail
);
11195 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11196 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11199 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11201 bool inout
= false;
11203 /* The intrinsic assignment does the right thing for pointers
11204 of all kinds and allocatable components. */
11205 if (!gfc_bt_struct (comp1
->ts
.type
)
11206 || comp1
->attr
.pointer
11207 || comp1
->attr
.allocatable
11208 || comp1
->attr
.proc_pointer_comp
11209 || comp1
->attr
.class_pointer
11210 || comp1
->attr
.proc_pointer
)
11213 /* Make an assigment for this component. */
11214 this_code
= build_assignment (EXEC_ASSIGN
,
11215 (*code
)->expr1
, (*code
)->expr2
,
11216 comp1
, comp2
, (*code
)->loc
);
11218 /* Convert the assignment if there is a defined assignment for
11219 this type. Otherwise, using the call from gfc_resolve_code,
11220 recurse into its components. */
11221 gfc_resolve_code (this_code
, ns
);
11223 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11225 gfc_formal_arglist
*dummy_args
;
11227 /* Check that there is a typebound defined assignment. If not,
11228 then this must be a module defined assignment. We cannot
11229 use the defined_assign_comp attribute here because it must
11230 be this derived type that has the defined assignment and not
11232 if (!(comp1
->ts
.u
.derived
->f2k_derived
11233 && comp1
->ts
.u
.derived
->f2k_derived
11234 ->tb_op
[INTRINSIC_ASSIGN
]))
11236 gfc_free_statements (this_code
);
11241 /* If the first argument of the subroutine has intent INOUT
11242 a temporary must be generated and used instead. */
11243 rsym
= this_code
->resolved_sym
;
11244 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11246 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11248 gfc_code
*temp_code
;
11251 /* Build the temporary required for the assignment and put
11252 it at the head of the generated code. */
11255 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11256 temp_code
= build_assignment (EXEC_ASSIGN
,
11257 t1
, (*code
)->expr1
,
11258 NULL
, NULL
, (*code
)->loc
);
11260 /* For allocatable LHS, check whether it is allocated. Note
11261 that allocatable components with defined assignment are
11262 not yet support. See PR 57696. */
11263 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11267 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11268 block
= gfc_get_code (EXEC_IF
);
11269 block
->block
= gfc_get_code (EXEC_IF
);
11270 block
->block
->expr1
11271 = gfc_build_intrinsic_call (ns
,
11272 GFC_ISYM_ALLOCATED
, "allocated",
11273 (*code
)->loc
, 1, e
);
11274 block
->block
->next
= temp_code
;
11277 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11280 /* Replace the first actual arg with the component of the
11282 gfc_free_expr (this_code
->ext
.actual
->expr
);
11283 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11284 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11286 /* If the LHS variable is allocatable and wasn't allocated and
11287 the temporary is allocatable, pointer assign the address of
11288 the freshly allocated LHS to the temporary. */
11289 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11290 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11295 cond
= gfc_get_expr ();
11296 cond
->ts
.type
= BT_LOGICAL
;
11297 cond
->ts
.kind
= gfc_default_logical_kind
;
11298 cond
->expr_type
= EXPR_OP
;
11299 cond
->where
= (*code
)->loc
;
11300 cond
->value
.op
.op
= INTRINSIC_NOT
;
11301 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11302 GFC_ISYM_ALLOCATED
, "allocated",
11303 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11304 block
= gfc_get_code (EXEC_IF
);
11305 block
->block
= gfc_get_code (EXEC_IF
);
11306 block
->block
->expr1
= cond
;
11307 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11308 t1
, (*code
)->expr1
,
11309 NULL
, NULL
, (*code
)->loc
);
11310 add_code_to_chain (&block
, &head
, &tail
);
11314 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11316 /* Don't add intrinsic assignments since they are already
11317 effected by the intrinsic assignment of the structure. */
11318 gfc_free_statements (this_code
);
11323 add_code_to_chain (&this_code
, &head
, &tail
);
11327 /* Transfer the value to the final result. */
11328 this_code
= build_assignment (EXEC_ASSIGN
,
11329 (*code
)->expr1
, t1
,
11330 comp1
, comp2
, (*code
)->loc
);
11331 add_code_to_chain (&this_code
, &head
, &tail
);
11335 /* Put the temporary assignments at the top of the generated code. */
11336 if (tmp_head
&& component_assignment_level
== 1)
11338 gfc_append_code (tmp_head
, head
);
11340 tmp_head
= tmp_tail
= NULL
;
11343 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11344 // not accidentally deallocated. Hence, nullify t1.
11345 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11346 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11352 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11353 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11354 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11355 block
= gfc_get_code (EXEC_IF
);
11356 block
->block
= gfc_get_code (EXEC_IF
);
11357 block
->block
->expr1
= cond
;
11358 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11359 t1
, gfc_get_null_expr (&(*code
)->loc
),
11360 NULL
, NULL
, (*code
)->loc
);
11361 gfc_append_code (tail
, block
);
11365 /* Now attach the remaining code chain to the input code. Step on
11366 to the end of the new code since resolution is complete. */
11367 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11368 tail
->next
= (*code
)->next
;
11369 /* Overwrite 'code' because this would place the intrinsic assignment
11370 before the temporary for the lhs is created. */
11371 gfc_free_expr ((*code
)->expr1
);
11372 gfc_free_expr ((*code
)->expr2
);
11378 component_assignment_level
--;
11382 /* F2008: Pointer function assignments are of the form:
11383 ptr_fcn (args) = expr
11384 This function breaks these assignments into two statements:
11385 temporary_pointer => ptr_fcn(args)
11386 temporary_pointer = expr */
11389 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11391 gfc_expr
*tmp_ptr_expr
;
11392 gfc_code
*this_code
;
11393 gfc_component
*comp
;
11396 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11399 /* Even if standard does not support this feature, continue to build
11400 the two statements to avoid upsetting frontend_passes.c. */
11401 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11402 "%L", &(*code
)->loc
);
11404 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11407 s
= comp
->ts
.interface
;
11409 s
= (*code
)->expr1
->symtree
->n
.sym
;
11411 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11413 gfc_error ("The function result on the lhs of the assignment at "
11414 "%L must have the pointer attribute.",
11415 &(*code
)->expr1
->where
);
11416 (*code
)->op
= EXEC_NOP
;
11420 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11422 /* get_temp_from_expression is set up for ordinary assignments. To that
11423 end, where array bounds are not known, arrays are made allocatable.
11424 Change the temporary to a pointer here. */
11425 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11426 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11427 tmp_ptr_expr
->where
= (*code
)->loc
;
11429 this_code
= build_assignment (EXEC_ASSIGN
,
11430 tmp_ptr_expr
, (*code
)->expr2
,
11431 NULL
, NULL
, (*code
)->loc
);
11432 this_code
->next
= (*code
)->next
;
11433 (*code
)->next
= this_code
;
11434 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11435 (*code
)->expr2
= (*code
)->expr1
;
11436 (*code
)->expr1
= tmp_ptr_expr
;
11442 /* Deferred character length assignments from an operator expression
11443 require a temporary because the character length of the lhs can
11444 change in the course of the assignment. */
11447 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11449 gfc_expr
*tmp_expr
;
11450 gfc_code
*this_code
;
11452 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11453 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11454 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11457 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11460 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11463 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11464 tmp_expr
->where
= (*code
)->loc
;
11466 /* A new charlen is required to ensure that the variable string
11467 length is different to that of the original lhs. */
11468 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11469 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11470 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11471 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11473 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11475 this_code
= build_assignment (EXEC_ASSIGN
,
11477 gfc_copy_expr (tmp_expr
),
11478 NULL
, NULL
, (*code
)->loc
);
11480 (*code
)->expr1
= tmp_expr
;
11482 this_code
->next
= (*code
)->next
;
11483 (*code
)->next
= this_code
;
11489 /* Given a block of code, recursively resolve everything pointed to by this
11493 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11495 int omp_workshare_save
;
11496 int forall_save
, do_concurrent_save
;
11500 frame
.prev
= cs_base
;
11504 find_reachable_labels (code
);
11506 for (; code
; code
= code
->next
)
11508 frame
.current
= code
;
11509 forall_save
= forall_flag
;
11510 do_concurrent_save
= gfc_do_concurrent_flag
;
11512 if (code
->op
== EXEC_FORALL
)
11515 gfc_resolve_forall (code
, ns
, forall_save
);
11518 else if (code
->block
)
11520 omp_workshare_save
= -1;
11523 case EXEC_OACC_PARALLEL_LOOP
:
11524 case EXEC_OACC_PARALLEL
:
11525 case EXEC_OACC_KERNELS_LOOP
:
11526 case EXEC_OACC_KERNELS
:
11527 case EXEC_OACC_DATA
:
11528 case EXEC_OACC_HOST_DATA
:
11529 case EXEC_OACC_LOOP
:
11530 gfc_resolve_oacc_blocks (code
, ns
);
11532 case EXEC_OMP_PARALLEL_WORKSHARE
:
11533 omp_workshare_save
= omp_workshare_flag
;
11534 omp_workshare_flag
= 1;
11535 gfc_resolve_omp_parallel_blocks (code
, ns
);
11537 case EXEC_OMP_PARALLEL
:
11538 case EXEC_OMP_PARALLEL_DO
:
11539 case EXEC_OMP_PARALLEL_DO_SIMD
:
11540 case EXEC_OMP_PARALLEL_SECTIONS
:
11541 case EXEC_OMP_TARGET_PARALLEL
:
11542 case EXEC_OMP_TARGET_PARALLEL_DO
:
11543 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11544 case EXEC_OMP_TARGET_TEAMS
:
11545 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11546 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11547 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11548 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11549 case EXEC_OMP_TASK
:
11550 case EXEC_OMP_TASKLOOP
:
11551 case EXEC_OMP_TASKLOOP_SIMD
:
11552 case EXEC_OMP_TEAMS
:
11553 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11554 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11555 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11556 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11557 omp_workshare_save
= omp_workshare_flag
;
11558 omp_workshare_flag
= 0;
11559 gfc_resolve_omp_parallel_blocks (code
, ns
);
11561 case EXEC_OMP_DISTRIBUTE
:
11562 case EXEC_OMP_DISTRIBUTE_SIMD
:
11564 case EXEC_OMP_DO_SIMD
:
11565 case EXEC_OMP_SIMD
:
11566 case EXEC_OMP_TARGET_SIMD
:
11567 gfc_resolve_omp_do_blocks (code
, ns
);
11569 case EXEC_SELECT_TYPE
:
11570 /* Blocks are handled in resolve_select_type because we have
11571 to transform the SELECT TYPE into ASSOCIATE first. */
11573 case EXEC_DO_CONCURRENT
:
11574 gfc_do_concurrent_flag
= 1;
11575 gfc_resolve_blocks (code
->block
, ns
);
11576 gfc_do_concurrent_flag
= 2;
11578 case EXEC_OMP_WORKSHARE
:
11579 omp_workshare_save
= omp_workshare_flag
;
11580 omp_workshare_flag
= 1;
11583 gfc_resolve_blocks (code
->block
, ns
);
11587 if (omp_workshare_save
!= -1)
11588 omp_workshare_flag
= omp_workshare_save
;
11592 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11593 t
= gfc_resolve_expr (code
->expr1
);
11594 forall_flag
= forall_save
;
11595 gfc_do_concurrent_flag
= do_concurrent_save
;
11597 if (!gfc_resolve_expr (code
->expr2
))
11600 if (code
->op
== EXEC_ALLOCATE
11601 && !gfc_resolve_expr (code
->expr3
))
11607 case EXEC_END_BLOCK
:
11608 case EXEC_END_NESTED_BLOCK
:
11612 case EXEC_ERROR_STOP
:
11614 case EXEC_CONTINUE
:
11616 case EXEC_ASSIGN_CALL
:
11619 case EXEC_CRITICAL
:
11620 resolve_critical (code
);
11623 case EXEC_SYNC_ALL
:
11624 case EXEC_SYNC_IMAGES
:
11625 case EXEC_SYNC_MEMORY
:
11626 resolve_sync (code
);
11631 case EXEC_EVENT_POST
:
11632 case EXEC_EVENT_WAIT
:
11633 resolve_lock_unlock_event (code
);
11636 case EXEC_FAIL_IMAGE
:
11637 case EXEC_FORM_TEAM
:
11638 case EXEC_CHANGE_TEAM
:
11639 case EXEC_END_TEAM
:
11640 case EXEC_SYNC_TEAM
:
11644 /* Keep track of which entry we are up to. */
11645 current_entry_id
= code
->ext
.entry
->id
;
11649 resolve_where (code
, NULL
);
11653 if (code
->expr1
!= NULL
)
11655 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11656 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11657 "INTEGER variable", &code
->expr1
->where
);
11658 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11659 gfc_error ("Variable %qs has not been assigned a target "
11660 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11661 &code
->expr1
->where
);
11664 resolve_branch (code
->label1
, code
);
11668 if (code
->expr1
!= NULL
11669 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11670 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11671 "INTEGER return specifier", &code
->expr1
->where
);
11674 case EXEC_INIT_ASSIGN
:
11675 case EXEC_END_PROCEDURE
:
11682 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11684 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11685 && code
->expr1
->value
.function
.isym
11686 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11687 remove_caf_get_intrinsic (code
->expr1
);
11689 /* If this is a pointer function in an lvalue variable context,
11690 the new code will have to be resolved afresh. This is also the
11691 case with an error, where the code is transformed into NOP to
11692 prevent ICEs downstream. */
11693 if (resolve_ptr_fcn_assign (&code
, ns
)
11694 || code
->op
== EXEC_NOP
)
11697 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11701 if (resolve_ordinary_assign (code
, ns
))
11703 if (code
->op
== EXEC_COMPCALL
)
11709 /* Check for dependencies in deferred character length array
11710 assignments and generate a temporary, if necessary. */
11711 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11714 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11715 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11716 && code
->expr1
->ts
.u
.derived
11717 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11718 generate_component_assignments (&code
, ns
);
11722 case EXEC_LABEL_ASSIGN
:
11723 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11724 gfc_error ("Label %d referenced at %L is never defined",
11725 code
->label1
->value
, &code
->label1
->where
);
11727 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11728 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11729 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11730 != gfc_default_integer_kind
11731 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11732 gfc_error ("ASSIGN statement at %L requires a scalar "
11733 "default INTEGER variable", &code
->expr1
->where
);
11736 case EXEC_POINTER_ASSIGN
:
11743 /* This is both a variable definition and pointer assignment
11744 context, so check both of them. For rank remapping, a final
11745 array ref may be present on the LHS and fool gfc_expr_attr
11746 used in gfc_check_vardef_context. Remove it. */
11747 e
= remove_last_array_ref (code
->expr1
);
11748 t
= gfc_check_vardef_context (e
, true, false, false,
11749 _("pointer assignment"));
11751 t
= gfc_check_vardef_context (e
, false, false, false,
11752 _("pointer assignment"));
11755 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11760 /* Assigning a class object always is a regular assign. */
11761 if (code
->expr2
->ts
.type
== BT_CLASS
11762 && code
->expr1
->ts
.type
== BT_CLASS
11763 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11764 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11765 && code
->expr2
->expr_type
== EXPR_VARIABLE
11766 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11768 code
->op
= EXEC_ASSIGN
;
11772 case EXEC_ARITHMETIC_IF
:
11774 gfc_expr
*e
= code
->expr1
;
11776 gfc_resolve_expr (e
);
11777 if (e
->expr_type
== EXPR_NULL
)
11778 gfc_error ("Invalid NULL at %L", &e
->where
);
11780 if (t
&& (e
->rank
> 0
11781 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11782 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11783 "REAL or INTEGER expression", &e
->where
);
11785 resolve_branch (code
->label1
, code
);
11786 resolve_branch (code
->label2
, code
);
11787 resolve_branch (code
->label3
, code
);
11792 if (t
&& code
->expr1
!= NULL
11793 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11794 || code
->expr1
->rank
!= 0))
11795 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11796 &code
->expr1
->where
);
11801 resolve_call (code
);
11804 case EXEC_COMPCALL
:
11806 resolve_typebound_subroutine (code
);
11809 case EXEC_CALL_PPC
:
11810 resolve_ppc_call (code
);
11814 /* Select is complicated. Also, a SELECT construct could be
11815 a transformed computed GOTO. */
11816 resolve_select (code
, false);
11819 case EXEC_SELECT_TYPE
:
11820 resolve_select_type (code
, ns
);
11823 case EXEC_SELECT_RANK
:
11824 resolve_select_rank (code
, ns
);
11828 resolve_block_construct (code
);
11832 if (code
->ext
.iterator
!= NULL
)
11834 gfc_iterator
*iter
= code
->ext
.iterator
;
11835 if (gfc_resolve_iterator (iter
, true, false))
11836 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11841 case EXEC_DO_WHILE
:
11842 if (code
->expr1
== NULL
)
11843 gfc_internal_error ("gfc_resolve_code(): No expression on "
11846 && (code
->expr1
->rank
!= 0
11847 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11848 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11849 "a scalar LOGICAL expression", &code
->expr1
->where
);
11852 case EXEC_ALLOCATE
:
11854 resolve_allocate_deallocate (code
, "ALLOCATE");
11858 case EXEC_DEALLOCATE
:
11860 resolve_allocate_deallocate (code
, "DEALLOCATE");
11865 if (!gfc_resolve_open (code
->ext
.open
))
11868 resolve_branch (code
->ext
.open
->err
, code
);
11872 if (!gfc_resolve_close (code
->ext
.close
))
11875 resolve_branch (code
->ext
.close
->err
, code
);
11878 case EXEC_BACKSPACE
:
11882 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11885 resolve_branch (code
->ext
.filepos
->err
, code
);
11889 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11892 resolve_branch (code
->ext
.inquire
->err
, code
);
11895 case EXEC_IOLENGTH
:
11896 gcc_assert (code
->ext
.inquire
!= NULL
);
11897 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11900 resolve_branch (code
->ext
.inquire
->err
, code
);
11904 if (!gfc_resolve_wait (code
->ext
.wait
))
11907 resolve_branch (code
->ext
.wait
->err
, code
);
11908 resolve_branch (code
->ext
.wait
->end
, code
);
11909 resolve_branch (code
->ext
.wait
->eor
, code
);
11914 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11917 resolve_branch (code
->ext
.dt
->err
, code
);
11918 resolve_branch (code
->ext
.dt
->end
, code
);
11919 resolve_branch (code
->ext
.dt
->eor
, code
);
11922 case EXEC_TRANSFER
:
11923 resolve_transfer (code
);
11926 case EXEC_DO_CONCURRENT
:
11928 resolve_forall_iterators (code
->ext
.forall_iterator
);
11930 if (code
->expr1
!= NULL
11931 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11932 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11933 "expression", &code
->expr1
->where
);
11936 case EXEC_OACC_PARALLEL_LOOP
:
11937 case EXEC_OACC_PARALLEL
:
11938 case EXEC_OACC_KERNELS_LOOP
:
11939 case EXEC_OACC_KERNELS
:
11940 case EXEC_OACC_DATA
:
11941 case EXEC_OACC_HOST_DATA
:
11942 case EXEC_OACC_LOOP
:
11943 case EXEC_OACC_UPDATE
:
11944 case EXEC_OACC_WAIT
:
11945 case EXEC_OACC_CACHE
:
11946 case EXEC_OACC_ENTER_DATA
:
11947 case EXEC_OACC_EXIT_DATA
:
11948 case EXEC_OACC_ATOMIC
:
11949 case EXEC_OACC_DECLARE
:
11950 gfc_resolve_oacc_directive (code
, ns
);
11953 case EXEC_OMP_ATOMIC
:
11954 case EXEC_OMP_BARRIER
:
11955 case EXEC_OMP_CANCEL
:
11956 case EXEC_OMP_CANCELLATION_POINT
:
11957 case EXEC_OMP_CRITICAL
:
11958 case EXEC_OMP_FLUSH
:
11959 case EXEC_OMP_DISTRIBUTE
:
11960 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11961 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11962 case EXEC_OMP_DISTRIBUTE_SIMD
:
11964 case EXEC_OMP_DO_SIMD
:
11965 case EXEC_OMP_MASTER
:
11966 case EXEC_OMP_ORDERED
:
11967 case EXEC_OMP_SECTIONS
:
11968 case EXEC_OMP_SIMD
:
11969 case EXEC_OMP_SINGLE
:
11970 case EXEC_OMP_TARGET
:
11971 case EXEC_OMP_TARGET_DATA
:
11972 case EXEC_OMP_TARGET_ENTER_DATA
:
11973 case EXEC_OMP_TARGET_EXIT_DATA
:
11974 case EXEC_OMP_TARGET_PARALLEL
:
11975 case EXEC_OMP_TARGET_PARALLEL_DO
:
11976 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11977 case EXEC_OMP_TARGET_SIMD
:
11978 case EXEC_OMP_TARGET_TEAMS
:
11979 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11980 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11981 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11982 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11983 case EXEC_OMP_TARGET_UPDATE
:
11984 case EXEC_OMP_TASK
:
11985 case EXEC_OMP_TASKGROUP
:
11986 case EXEC_OMP_TASKLOOP
:
11987 case EXEC_OMP_TASKLOOP_SIMD
:
11988 case EXEC_OMP_TASKWAIT
:
11989 case EXEC_OMP_TASKYIELD
:
11990 case EXEC_OMP_TEAMS
:
11991 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11992 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11993 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11994 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11995 case EXEC_OMP_WORKSHARE
:
11996 gfc_resolve_omp_directive (code
, ns
);
11999 case EXEC_OMP_PARALLEL
:
12000 case EXEC_OMP_PARALLEL_DO
:
12001 case EXEC_OMP_PARALLEL_DO_SIMD
:
12002 case EXEC_OMP_PARALLEL_SECTIONS
:
12003 case EXEC_OMP_PARALLEL_WORKSHARE
:
12004 omp_workshare_save
= omp_workshare_flag
;
12005 omp_workshare_flag
= 0;
12006 gfc_resolve_omp_directive (code
, ns
);
12007 omp_workshare_flag
= omp_workshare_save
;
12011 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12015 cs_base
= frame
.prev
;
12019 /* Resolve initial values and make sure they are compatible with
12023 resolve_values (gfc_symbol
*sym
)
12027 if (sym
->value
== NULL
)
12030 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12031 t
= resolve_structure_cons (sym
->value
, 1);
12033 t
= gfc_resolve_expr (sym
->value
);
12038 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12042 /* Verify any BIND(C) derived types in the namespace so we can report errors
12043 for them once, rather than for each variable declared of that type. */
12046 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12048 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12049 && derived_sym
->attr
.is_bind_c
== 1)
12050 verify_bind_c_derived_type (derived_sym
);
12056 /* Check the interfaces of DTIO procedures associated with derived
12057 type 'sym'. These procedures can either have typebound bindings or
12058 can appear in DTIO generic interfaces. */
12061 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12063 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12066 gfc_check_dtio_interfaces (sym
);
12071 /* Verify that any binding labels used in a given namespace do not collide
12072 with the names or binding labels of any global symbols. Multiple INTERFACE
12073 for the same procedure are permitted. */
12076 gfc_verify_binding_labels (gfc_symbol
*sym
)
12079 const char *module
;
12081 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12082 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12085 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12088 module
= sym
->module
;
12089 else if (sym
->ns
&& sym
->ns
->proc_name
12090 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12091 module
= sym
->ns
->proc_name
->name
;
12092 else if (sym
->ns
&& sym
->ns
->parent
12093 && sym
->ns
&& sym
->ns
->parent
->proc_name
12094 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12095 module
= sym
->ns
->parent
->proc_name
->name
;
12101 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12104 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12105 gsym
->where
= sym
->declared_at
;
12106 gsym
->sym_name
= sym
->name
;
12107 gsym
->binding_label
= sym
->binding_label
;
12108 gsym
->ns
= sym
->ns
;
12109 gsym
->mod_name
= module
;
12110 if (sym
->attr
.function
)
12111 gsym
->type
= GSYM_FUNCTION
;
12112 else if (sym
->attr
.subroutine
)
12113 gsym
->type
= GSYM_SUBROUTINE
;
12114 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12115 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12119 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12121 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12122 "identifier as entity at %L", sym
->name
,
12123 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12124 /* Clear the binding label to prevent checking multiple times. */
12125 sym
->binding_label
= NULL
;
12129 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12130 && (strcmp (module
, gsym
->mod_name
) != 0
12131 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12133 /* This can only happen if the variable is defined in a module - if it
12134 isn't the same module, reject it. */
12135 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12136 "uses the same global identifier as entity at %L from module %qs",
12137 sym
->name
, module
, sym
->binding_label
,
12138 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12139 sym
->binding_label
= NULL
;
12143 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12144 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12145 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12146 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12147 && (module
!= gsym
->mod_name
12148 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12149 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12151 /* Print an error if the procedure is defined multiple times; we have to
12152 exclude references to the same procedure via module association or
12153 multiple checks for the same procedure. */
12154 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12155 "global identifier as entity at %L", sym
->name
,
12156 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12157 sym
->binding_label
= NULL
;
12162 /* Resolve an index expression. */
12165 resolve_index_expr (gfc_expr
*e
)
12167 if (!gfc_resolve_expr (e
))
12170 if (!gfc_simplify_expr (e
, 0))
12173 if (!gfc_specification_expr (e
))
12180 /* Resolve a charlen structure. */
12183 resolve_charlen (gfc_charlen
*cl
)
12186 bool saved_specification_expr
;
12192 saved_specification_expr
= specification_expr
;
12193 specification_expr
= true;
12195 if (cl
->length_from_typespec
)
12197 if (!gfc_resolve_expr (cl
->length
))
12199 specification_expr
= saved_specification_expr
;
12203 if (!gfc_simplify_expr (cl
->length
, 0))
12205 specification_expr
= saved_specification_expr
;
12209 /* cl->length has been resolved. It should have an integer type. */
12210 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12212 gfc_error ("Scalar INTEGER expression expected at %L",
12213 &cl
->length
->where
);
12219 if (!resolve_index_expr (cl
->length
))
12221 specification_expr
= saved_specification_expr
;
12226 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12227 a negative value, the length of character entities declared is zero. */
12228 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12229 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12230 gfc_replace_expr (cl
->length
,
12231 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12233 /* Check that the character length is not too large. */
12234 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12235 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12236 && cl
->length
->ts
.type
== BT_INTEGER
12237 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12239 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12240 specification_expr
= saved_specification_expr
;
12244 specification_expr
= saved_specification_expr
;
12249 /* Test for non-constant shape arrays. */
12252 is_non_constant_shape_array (gfc_symbol
*sym
)
12258 not_constant
= false;
12259 if (sym
->as
!= NULL
)
12261 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12262 has not been simplified; parameter array references. Do the
12263 simplification now. */
12264 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12266 e
= sym
->as
->lower
[i
];
12267 if (e
&& (!resolve_index_expr(e
)
12268 || !gfc_is_constant_expr (e
)))
12269 not_constant
= true;
12270 e
= sym
->as
->upper
[i
];
12271 if (e
&& (!resolve_index_expr(e
)
12272 || !gfc_is_constant_expr (e
)))
12273 not_constant
= true;
12276 return not_constant
;
12279 /* Given a symbol and an initialization expression, add code to initialize
12280 the symbol to the function entry. */
12282 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12286 gfc_namespace
*ns
= sym
->ns
;
12288 /* Search for the function namespace if this is a contained
12289 function without an explicit result. */
12290 if (sym
->attr
.function
&& sym
== sym
->result
12291 && sym
->name
!= sym
->ns
->proc_name
->name
)
12293 ns
= ns
->contained
;
12294 for (;ns
; ns
= ns
->sibling
)
12295 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12301 gfc_free_expr (init
);
12305 /* Build an l-value expression for the result. */
12306 lval
= gfc_lval_expr_from_sym (sym
);
12308 /* Add the code at scope entry. */
12309 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12310 init_st
->next
= ns
->code
;
12311 ns
->code
= init_st
;
12313 /* Assign the default initializer to the l-value. */
12314 init_st
->loc
= sym
->declared_at
;
12315 init_st
->expr1
= lval
;
12316 init_st
->expr2
= init
;
12320 /* Whether or not we can generate a default initializer for a symbol. */
12323 can_generate_init (gfc_symbol
*sym
)
12325 symbol_attribute
*a
;
12330 /* These symbols should never have a default initialization. */
12335 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12336 && (CLASS_DATA (sym
)->attr
.class_pointer
12337 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12338 || a
->in_equivalence
12345 || (!a
->referenced
&& !a
->result
)
12346 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12347 || (a
->function
&& sym
!= sym
->result
)
12352 /* Assign the default initializer to a derived type variable or result. */
12355 apply_default_init (gfc_symbol
*sym
)
12357 gfc_expr
*init
= NULL
;
12359 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12362 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12363 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12365 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12368 build_init_assign (sym
, init
);
12369 sym
->attr
.referenced
= 1;
12373 /* Build an initializer for a local. Returns null if the symbol should not have
12374 a default initialization. */
12377 build_default_init_expr (gfc_symbol
*sym
)
12379 /* These symbols should never have a default initialization. */
12380 if (sym
->attr
.allocatable
12381 || sym
->attr
.external
12383 || sym
->attr
.pointer
12384 || sym
->attr
.in_equivalence
12385 || sym
->attr
.in_common
12388 || sym
->attr
.cray_pointee
12389 || sym
->attr
.cray_pointer
12393 /* Get the appropriate init expression. */
12394 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12397 /* Add an initialization expression to a local variable. */
12399 apply_default_init_local (gfc_symbol
*sym
)
12401 gfc_expr
*init
= NULL
;
12403 /* The symbol should be a variable or a function return value. */
12404 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12405 || (sym
->attr
.function
&& sym
->result
!= sym
))
12408 /* Try to build the initializer expression. If we can't initialize
12409 this symbol, then init will be NULL. */
12410 init
= build_default_init_expr (sym
);
12414 /* For saved variables, we don't want to add an initializer at function
12415 entry, so we just add a static initializer. Note that automatic variables
12416 are stack allocated even with -fno-automatic; we have also to exclude
12417 result variable, which are also nonstatic. */
12418 if (!sym
->attr
.automatic
12419 && (sym
->attr
.save
|| sym
->ns
->save_all
12420 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12421 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12422 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12424 /* Don't clobber an existing initializer! */
12425 gcc_assert (sym
->value
== NULL
);
12430 build_init_assign (sym
, init
);
12434 /* Resolution of common features of flavors variable and procedure. */
12437 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12439 gfc_array_spec
*as
;
12441 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12442 as
= CLASS_DATA (sym
)->as
;
12446 /* Constraints on deferred shape variable. */
12447 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12449 bool pointer
, allocatable
, dimension
;
12451 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12453 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12454 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12455 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12459 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12460 allocatable
= sym
->attr
.allocatable
;
12461 dimension
= sym
->attr
.dimension
;
12466 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12468 gfc_error ("Allocatable array %qs at %L must have a deferred "
12469 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12472 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12473 "%qs at %L may not be ALLOCATABLE",
12474 sym
->name
, &sym
->declared_at
))
12478 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12480 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12481 "assumed rank", sym
->name
, &sym
->declared_at
);
12487 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12488 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12490 gfc_error ("Array %qs at %L cannot have a deferred shape",
12491 sym
->name
, &sym
->declared_at
);
12496 /* Constraints on polymorphic variables. */
12497 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12500 if (sym
->attr
.class_ok
12501 && !sym
->attr
.select_type_temporary
12502 && !UNLIMITED_POLY (sym
)
12503 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12505 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12506 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12507 &sym
->declared_at
);
12512 /* Assume that use associated symbols were checked in the module ns.
12513 Class-variables that are associate-names are also something special
12514 and excepted from the test. */
12515 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12517 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12518 "or pointer", sym
->name
, &sym
->declared_at
);
12527 /* Additional checks for symbols with flavor variable and derived
12528 type. To be called from resolve_fl_variable. */
12531 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12533 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12535 /* Check to see if a derived type is blocked from being host
12536 associated by the presence of another class I symbol in the same
12537 namespace. 14.6.1.3 of the standard and the discussion on
12538 comp.lang.fortran. */
12539 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12540 && !sym
->ts
.u
.derived
->attr
.use_assoc
12541 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12544 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12545 if (s
&& s
->attr
.generic
)
12546 s
= gfc_find_dt_in_generic (s
);
12547 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12549 gfc_error ("The type %qs cannot be host associated at %L "
12550 "because it is blocked by an incompatible object "
12551 "of the same name declared at %L",
12552 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12558 /* 4th constraint in section 11.3: "If an object of a type for which
12559 component-initialization is specified (R429) appears in the
12560 specification-part of a module and does not have the ALLOCATABLE
12561 or POINTER attribute, the object shall have the SAVE attribute."
12563 The check for initializers is performed with
12564 gfc_has_default_initializer because gfc_default_initializer generates
12565 a hidden default for allocatable components. */
12566 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12567 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12568 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12569 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12570 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12571 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12572 "%qs at %L, needed due to the default "
12573 "initialization", sym
->name
, &sym
->declared_at
))
12576 /* Assign default initializer. */
12577 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12578 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12579 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12585 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12586 except in the declaration of an entity or component that has the POINTER
12587 or ALLOCATABLE attribute. */
12590 deferred_requirements (gfc_symbol
*sym
)
12592 if (sym
->ts
.deferred
12593 && !(sym
->attr
.pointer
12594 || sym
->attr
.allocatable
12595 || sym
->attr
.associate_var
12596 || sym
->attr
.omp_udr_artificial_var
))
12598 /* If a function has a result variable, only check the variable. */
12599 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12602 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12603 "requires either the POINTER or ALLOCATABLE attribute",
12604 sym
->name
, &sym
->declared_at
);
12611 /* Resolve symbols with flavor variable. */
12614 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12616 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12619 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12622 /* Set this flag to check that variables are parameters of all entries.
12623 This check is effected by the call to gfc_resolve_expr through
12624 is_non_constant_shape_array. */
12625 bool saved_specification_expr
= specification_expr
;
12626 specification_expr
= true;
12628 if (sym
->ns
->proc_name
12629 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12630 || sym
->ns
->proc_name
->attr
.is_main_program
)
12631 && !sym
->attr
.use_assoc
12632 && !sym
->attr
.allocatable
12633 && !sym
->attr
.pointer
12634 && is_non_constant_shape_array (sym
))
12636 /* F08:C541. The shape of an array defined in a main program or module
12637 * needs to be constant. */
12638 gfc_error ("The module or main program array %qs at %L must "
12639 "have constant shape", sym
->name
, &sym
->declared_at
);
12640 specification_expr
= saved_specification_expr
;
12644 /* Constraints on deferred type parameter. */
12645 if (!deferred_requirements (sym
))
12648 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12650 /* Make sure that character string variables with assumed length are
12651 dummy arguments. */
12652 gfc_expr
*e
= NULL
;
12655 e
= sym
->ts
.u
.cl
->length
;
12659 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12660 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12661 && !sym
->attr
.omp_udr_artificial_var
)
12663 gfc_error ("Entity with assumed character length at %L must be a "
12664 "dummy argument or a PARAMETER", &sym
->declared_at
);
12665 specification_expr
= saved_specification_expr
;
12669 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12671 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12672 specification_expr
= saved_specification_expr
;
12676 if (!gfc_is_constant_expr (e
)
12677 && !(e
->expr_type
== EXPR_VARIABLE
12678 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12680 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12681 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12682 || sym
->ns
->proc_name
->attr
.is_main_program
))
12684 gfc_error ("%qs at %L must have constant character length "
12685 "in this context", sym
->name
, &sym
->declared_at
);
12686 specification_expr
= saved_specification_expr
;
12689 if (sym
->attr
.in_common
)
12691 gfc_error ("COMMON variable %qs at %L must have constant "
12692 "character length", sym
->name
, &sym
->declared_at
);
12693 specification_expr
= saved_specification_expr
;
12699 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12700 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12702 /* Determine if the symbol may not have an initializer. */
12703 int no_init_flag
= 0, automatic_flag
= 0;
12704 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12705 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12707 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12708 && is_non_constant_shape_array (sym
))
12710 no_init_flag
= automatic_flag
= 1;
12712 /* Also, they must not have the SAVE attribute.
12713 SAVE_IMPLICIT is checked below. */
12714 if (sym
->as
&& sym
->attr
.codimension
)
12716 int corank
= sym
->as
->corank
;
12717 sym
->as
->corank
= 0;
12718 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12719 sym
->as
->corank
= corank
;
12721 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12723 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12724 specification_expr
= saved_specification_expr
;
12729 /* Ensure that any initializer is simplified. */
12731 gfc_simplify_expr (sym
->value
, 1);
12733 /* Reject illegal initializers. */
12734 if (!sym
->mark
&& sym
->value
)
12736 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12737 && CLASS_DATA (sym
)->attr
.allocatable
))
12738 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12739 sym
->name
, &sym
->declared_at
);
12740 else if (sym
->attr
.external
)
12741 gfc_error ("External %qs at %L cannot have an initializer",
12742 sym
->name
, &sym
->declared_at
);
12743 else if (sym
->attr
.dummy
12744 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12745 gfc_error ("Dummy %qs at %L cannot have an initializer",
12746 sym
->name
, &sym
->declared_at
);
12747 else if (sym
->attr
.intrinsic
)
12748 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12749 sym
->name
, &sym
->declared_at
);
12750 else if (sym
->attr
.result
)
12751 gfc_error ("Function result %qs at %L cannot have an initializer",
12752 sym
->name
, &sym
->declared_at
);
12753 else if (automatic_flag
)
12754 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12755 sym
->name
, &sym
->declared_at
);
12757 goto no_init_error
;
12758 specification_expr
= saved_specification_expr
;
12763 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12765 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12766 specification_expr
= saved_specification_expr
;
12770 specification_expr
= saved_specification_expr
;
12775 /* Compare the dummy characteristics of a module procedure interface
12776 declaration with the corresponding declaration in a submodule. */
12777 static gfc_formal_arglist
*new_formal
;
12778 static char errmsg
[200];
12781 compare_fsyms (gfc_symbol
*sym
)
12785 if (sym
== NULL
|| new_formal
== NULL
)
12788 fsym
= new_formal
->sym
;
12793 if (strcmp (sym
->name
, fsym
->name
) == 0)
12795 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12796 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12801 /* Resolve a procedure. */
12804 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12806 gfc_formal_arglist
*arg
;
12808 if (sym
->attr
.function
12809 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12812 /* Constraints on deferred type parameter. */
12813 if (!deferred_requirements (sym
))
12816 if (sym
->ts
.type
== BT_CHARACTER
)
12818 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12820 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12821 && !resolve_charlen (cl
))
12824 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12825 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12827 gfc_error ("Character-valued statement function %qs at %L must "
12828 "have constant length", sym
->name
, &sym
->declared_at
);
12833 /* Ensure that derived type for are not of a private type. Internal
12834 module procedures are excluded by 2.2.3.3 - i.e., they are not
12835 externally accessible and can access all the objects accessible in
12837 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12838 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12839 && gfc_check_symbol_access (sym
))
12841 gfc_interface
*iface
;
12843 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12846 && arg
->sym
->ts
.type
== BT_DERIVED
12847 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12848 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12849 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12850 "and cannot be a dummy argument"
12851 " of %qs, which is PUBLIC at %L",
12852 arg
->sym
->name
, sym
->name
,
12853 &sym
->declared_at
))
12855 /* Stop this message from recurring. */
12856 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12861 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12862 PRIVATE to the containing module. */
12863 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12865 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12868 && arg
->sym
->ts
.type
== BT_DERIVED
12869 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12870 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12871 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12872 "PUBLIC interface %qs at %L "
12873 "takes dummy arguments of %qs which "
12874 "is PRIVATE", iface
->sym
->name
,
12875 sym
->name
, &iface
->sym
->declared_at
,
12876 gfc_typename(&arg
->sym
->ts
)))
12878 /* Stop this message from recurring. */
12879 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12886 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12887 && !sym
->attr
.proc_pointer
)
12889 gfc_error ("Function %qs at %L cannot have an initializer",
12890 sym
->name
, &sym
->declared_at
);
12892 /* Make sure no second error is issued for this. */
12893 sym
->value
->error
= 1;
12897 /* An external symbol may not have an initializer because it is taken to be
12898 a procedure. Exception: Procedure Pointers. */
12899 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12901 gfc_error ("External object %qs at %L may not have an initializer",
12902 sym
->name
, &sym
->declared_at
);
12906 /* An elemental function is required to return a scalar 12.7.1 */
12907 if (sym
->attr
.elemental
&& sym
->attr
.function
12908 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12910 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12911 "result", sym
->name
, &sym
->declared_at
);
12912 /* Reset so that the error only occurs once. */
12913 sym
->attr
.elemental
= 0;
12917 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12918 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12920 gfc_error ("Statement function %qs at %L may not have pointer or "
12921 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12925 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12926 char-len-param shall not be array-valued, pointer-valued, recursive
12927 or pure. ....snip... A character value of * may only be used in the
12928 following ways: (i) Dummy arg of procedure - dummy associates with
12929 actual length; (ii) To declare a named constant; or (iii) External
12930 function - but length must be declared in calling scoping unit. */
12931 if (sym
->attr
.function
12932 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12933 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12935 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12936 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12938 if (sym
->as
&& sym
->as
->rank
)
12939 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12940 "array-valued", sym
->name
, &sym
->declared_at
);
12942 if (sym
->attr
.pointer
)
12943 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12944 "pointer-valued", sym
->name
, &sym
->declared_at
);
12946 if (sym
->attr
.pure
)
12947 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12948 "pure", sym
->name
, &sym
->declared_at
);
12950 if (sym
->attr
.recursive
)
12951 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12952 "recursive", sym
->name
, &sym
->declared_at
);
12957 /* Appendix B.2 of the standard. Contained functions give an
12958 error anyway. Deferred character length is an F2003 feature.
12959 Don't warn on intrinsic conversion functions, which start
12960 with two underscores. */
12961 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12962 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12963 gfc_notify_std (GFC_STD_F95_OBS
,
12964 "CHARACTER(*) function %qs at %L",
12965 sym
->name
, &sym
->declared_at
);
12968 /* F2008, C1218. */
12969 if (sym
->attr
.elemental
)
12971 if (sym
->attr
.proc_pointer
)
12973 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12974 sym
->name
, &sym
->declared_at
);
12977 if (sym
->attr
.dummy
)
12979 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12980 sym
->name
, &sym
->declared_at
);
12985 /* F2018, C15100: "The result of an elemental function shall be scalar,
12986 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12987 pointer is tested and caught elsewhere. */
12988 if (sym
->attr
.elemental
&& sym
->result
12989 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12991 gfc_error ("Function result variable %qs at %L of elemental "
12992 "function %qs shall not have an ALLOCATABLE or POINTER "
12993 "attribute", sym
->result
->name
,
12994 &sym
->result
->declared_at
, sym
->name
);
12998 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13000 gfc_formal_arglist
*curr_arg
;
13001 int has_non_interop_arg
= 0;
13003 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13004 sym
->common_block
))
13006 /* Clear these to prevent looking at them again if there was an
13008 sym
->attr
.is_bind_c
= 0;
13009 sym
->attr
.is_c_interop
= 0;
13010 sym
->ts
.is_c_interop
= 0;
13014 /* So far, no errors have been found. */
13015 sym
->attr
.is_c_interop
= 1;
13016 sym
->ts
.is_c_interop
= 1;
13019 curr_arg
= gfc_sym_get_dummy_args (sym
);
13020 while (curr_arg
!= NULL
)
13022 /* Skip implicitly typed dummy args here. */
13023 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13024 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13025 /* If something is found to fail, record the fact so we
13026 can mark the symbol for the procedure as not being
13027 BIND(C) to try and prevent multiple errors being
13029 has_non_interop_arg
= 1;
13031 curr_arg
= curr_arg
->next
;
13034 /* See if any of the arguments were not interoperable and if so, clear
13035 the procedure symbol to prevent duplicate error messages. */
13036 if (has_non_interop_arg
!= 0)
13038 sym
->attr
.is_c_interop
= 0;
13039 sym
->ts
.is_c_interop
= 0;
13040 sym
->attr
.is_bind_c
= 0;
13044 if (!sym
->attr
.proc_pointer
)
13046 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13048 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13049 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13052 if (sym
->attr
.intent
)
13054 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13055 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13058 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13060 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13061 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13064 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13065 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13066 || sym
->attr
.contained
))
13068 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13069 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13072 if (strcmp ("ppr@", sym
->name
) == 0)
13074 gfc_error ("Procedure pointer result %qs at %L "
13075 "is missing the pointer attribute",
13076 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13081 /* Assume that a procedure whose body is not known has references
13082 to external arrays. */
13083 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13084 sym
->attr
.array_outer_dependency
= 1;
13086 /* Compare the characteristics of a module procedure with the
13087 interface declaration. Ideally this would be done with
13088 gfc_compare_interfaces but, at present, the formal interface
13089 cannot be copied to the ts.interface. */
13090 if (sym
->attr
.module_procedure
13091 && sym
->attr
.if_source
== IFSRC_DECL
)
13094 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13096 char *submodule_name
;
13097 strcpy (name
, sym
->ns
->proc_name
->name
);
13098 module_name
= strtok (name
, ".");
13099 submodule_name
= strtok (NULL
, ".");
13101 iface
= sym
->tlink
;
13104 /* Make sure that the result uses the correct charlen for deferred
13106 if (iface
&& sym
->result
13107 && iface
->ts
.type
== BT_CHARACTER
13108 && iface
->ts
.deferred
)
13109 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13114 /* Check the procedure characteristics. */
13115 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13117 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13118 "PROCEDURE at %L and its interface in %s",
13119 &sym
->declared_at
, module_name
);
13123 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13125 gfc_error ("Mismatch in PURE attribute between MODULE "
13126 "PROCEDURE at %L and its interface in %s",
13127 &sym
->declared_at
, module_name
);
13131 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13133 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13134 "PROCEDURE at %L and its interface in %s",
13135 &sym
->declared_at
, module_name
);
13139 /* Check the result characteristics. */
13140 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13142 gfc_error ("%s between the MODULE PROCEDURE declaration "
13143 "in MODULE %qs and the declaration at %L in "
13145 errmsg
, module_name
, &sym
->declared_at
,
13146 submodule_name
? submodule_name
: module_name
);
13151 /* Check the characteristics of the formal arguments. */
13152 if (sym
->formal
&& sym
->formal_ns
)
13154 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13157 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13165 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13166 been defined and we now know their defined arguments, check that they fulfill
13167 the requirements of the standard for procedures used as finalizers. */
13170 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13172 gfc_finalizer
* list
;
13173 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13174 bool result
= true;
13175 bool seen_scalar
= false;
13178 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13181 gfc_resolve_finalizers (parent
, finalizable
);
13183 /* Ensure that derived-type components have a their finalizers resolved. */
13184 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13185 for (c
= derived
->components
; c
; c
= c
->next
)
13186 if (c
->ts
.type
== BT_DERIVED
13187 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13189 bool has_final2
= false;
13190 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13191 return false; /* Error. */
13192 has_final
= has_final
|| has_final2
;
13194 /* Return early if not finalizable. */
13198 *finalizable
= false;
13202 /* Walk over the list of finalizer-procedures, check them, and if any one
13203 does not fit in with the standard's definition, print an error and remove
13204 it from the list. */
13205 prev_link
= &derived
->f2k_derived
->finalizers
;
13206 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13208 gfc_formal_arglist
*dummy_args
;
13213 /* Skip this finalizer if we already resolved it. */
13214 if (list
->proc_tree
)
13216 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13217 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13218 seen_scalar
= true;
13219 prev_link
= &(list
->next
);
13223 /* Check this exists and is a SUBROUTINE. */
13224 if (!list
->proc_sym
->attr
.subroutine
)
13226 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13227 list
->proc_sym
->name
, &list
->where
);
13231 /* We should have exactly one argument. */
13232 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13233 if (!dummy_args
|| dummy_args
->next
)
13235 gfc_error ("FINAL procedure at %L must have exactly one argument",
13239 arg
= dummy_args
->sym
;
13241 /* This argument must be of our type. */
13242 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13244 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13245 &arg
->declared_at
, derived
->name
);
13249 /* It must neither be a pointer nor allocatable nor optional. */
13250 if (arg
->attr
.pointer
)
13252 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13253 &arg
->declared_at
);
13256 if (arg
->attr
.allocatable
)
13258 gfc_error ("Argument of FINAL procedure at %L must not be"
13259 " ALLOCATABLE", &arg
->declared_at
);
13262 if (arg
->attr
.optional
)
13264 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13265 &arg
->declared_at
);
13269 /* It must not be INTENT(OUT). */
13270 if (arg
->attr
.intent
== INTENT_OUT
)
13272 gfc_error ("Argument of FINAL procedure at %L must not be"
13273 " INTENT(OUT)", &arg
->declared_at
);
13277 /* Warn if the procedure is non-scalar and not assumed shape. */
13278 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13279 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13280 gfc_warning (OPT_Wsurprising
,
13281 "Non-scalar FINAL procedure at %L should have assumed"
13282 " shape argument", &arg
->declared_at
);
13284 /* Check that it does not match in kind and rank with a FINAL procedure
13285 defined earlier. To really loop over the *earlier* declarations,
13286 we need to walk the tail of the list as new ones were pushed at the
13288 /* TODO: Handle kind parameters once they are implemented. */
13289 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13290 for (i
= list
->next
; i
; i
= i
->next
)
13292 gfc_formal_arglist
*dummy_args
;
13294 /* Argument list might be empty; that is an error signalled earlier,
13295 but we nevertheless continued resolving. */
13296 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13299 gfc_symbol
* i_arg
= dummy_args
->sym
;
13300 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13301 if (i_rank
== my_rank
)
13303 gfc_error ("FINAL procedure %qs declared at %L has the same"
13304 " rank (%d) as %qs",
13305 list
->proc_sym
->name
, &list
->where
, my_rank
,
13306 i
->proc_sym
->name
);
13312 /* Is this the/a scalar finalizer procedure? */
13314 seen_scalar
= true;
13316 /* Find the symtree for this procedure. */
13317 gcc_assert (!list
->proc_tree
);
13318 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13320 prev_link
= &list
->next
;
13323 /* Remove wrong nodes immediately from the list so we don't risk any
13324 troubles in the future when they might fail later expectations. */
13327 *prev_link
= list
->next
;
13328 gfc_free_finalizer (i
);
13332 if (result
== false)
13335 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13336 were nodes in the list, must have been for arrays. It is surely a good
13337 idea to have a scalar version there if there's something to finalize. */
13338 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13339 gfc_warning (OPT_Wsurprising
,
13340 "Only array FINAL procedures declared for derived type %qs"
13341 " defined at %L, suggest also scalar one",
13342 derived
->name
, &derived
->declared_at
);
13344 vtab
= gfc_find_derived_vtab (derived
);
13345 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13346 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13349 *finalizable
= true;
13355 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13358 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13359 const char* generic_name
, locus where
)
13361 gfc_symbol
*sym1
, *sym2
;
13362 const char *pass1
, *pass2
;
13363 gfc_formal_arglist
*dummy_args
;
13365 gcc_assert (t1
->specific
&& t2
->specific
);
13366 gcc_assert (!t1
->specific
->is_generic
);
13367 gcc_assert (!t2
->specific
->is_generic
);
13368 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13370 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13371 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13376 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13377 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13378 || sym1
->attr
.function
!= sym2
->attr
.function
)
13380 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13381 " GENERIC %qs at %L",
13382 sym1
->name
, sym2
->name
, generic_name
, &where
);
13386 /* Determine PASS arguments. */
13387 if (t1
->specific
->nopass
)
13389 else if (t1
->specific
->pass_arg
)
13390 pass1
= t1
->specific
->pass_arg
;
13393 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13395 pass1
= dummy_args
->sym
->name
;
13399 if (t2
->specific
->nopass
)
13401 else if (t2
->specific
->pass_arg
)
13402 pass2
= t2
->specific
->pass_arg
;
13405 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13407 pass2
= dummy_args
->sym
->name
;
13412 /* Compare the interfaces. */
13413 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13414 NULL
, 0, pass1
, pass2
))
13416 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13417 sym1
->name
, sym2
->name
, generic_name
, &where
);
13425 /* Worker function for resolving a generic procedure binding; this is used to
13426 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13428 The difference between those cases is finding possible inherited bindings
13429 that are overridden, as one has to look for them in tb_sym_root,
13430 tb_uop_root or tb_op, respectively. Thus the caller must already find
13431 the super-type and set p->overridden correctly. */
13434 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13435 gfc_typebound_proc
* p
, const char* name
)
13437 gfc_tbp_generic
* target
;
13438 gfc_symtree
* first_target
;
13439 gfc_symtree
* inherited
;
13441 gcc_assert (p
&& p
->is_generic
);
13443 /* Try to find the specific bindings for the symtrees in our target-list. */
13444 gcc_assert (p
->u
.generic
);
13445 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13446 if (!target
->specific
)
13448 gfc_typebound_proc
* overridden_tbp
;
13449 gfc_tbp_generic
* g
;
13450 const char* target_name
;
13452 target_name
= target
->specific_st
->name
;
13454 /* Defined for this type directly. */
13455 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13457 target
->specific
= target
->specific_st
->n
.tb
;
13458 goto specific_found
;
13461 /* Look for an inherited specific binding. */
13464 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13469 gcc_assert (inherited
->n
.tb
);
13470 target
->specific
= inherited
->n
.tb
;
13471 goto specific_found
;
13475 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13476 " at %L", target_name
, name
, &p
->where
);
13479 /* Once we've found the specific binding, check it is not ambiguous with
13480 other specifics already found or inherited for the same GENERIC. */
13482 gcc_assert (target
->specific
);
13484 /* This must really be a specific binding! */
13485 if (target
->specific
->is_generic
)
13487 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13488 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13492 /* Check those already resolved on this type directly. */
13493 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13494 if (g
!= target
&& g
->specific
13495 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13498 /* Check for ambiguity with inherited specific targets. */
13499 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13500 overridden_tbp
= overridden_tbp
->overridden
)
13501 if (overridden_tbp
->is_generic
)
13503 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13505 gcc_assert (g
->specific
);
13506 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13512 /* If we attempt to "overwrite" a specific binding, this is an error. */
13513 if (p
->overridden
&& !p
->overridden
->is_generic
)
13515 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13516 " the same name", name
, &p
->where
);
13520 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13521 all must have the same attributes here. */
13522 first_target
= p
->u
.generic
->specific
->u
.specific
;
13523 gcc_assert (first_target
);
13524 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13525 p
->function
= first_target
->n
.sym
->attr
.function
;
13531 /* Resolve a GENERIC procedure binding for a derived type. */
13534 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13536 gfc_symbol
* super_type
;
13538 /* Find the overridden binding if any. */
13539 st
->n
.tb
->overridden
= NULL
;
13540 super_type
= gfc_get_derived_super_type (derived
);
13543 gfc_symtree
* overridden
;
13544 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13547 if (overridden
&& overridden
->n
.tb
)
13548 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13551 /* Resolve using worker function. */
13552 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13556 /* Retrieve the target-procedure of an operator binding and do some checks in
13557 common for intrinsic and user-defined type-bound operators. */
13560 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13562 gfc_symbol
* target_proc
;
13564 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13565 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13566 gcc_assert (target_proc
);
13568 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13569 if (target
->specific
->nopass
)
13571 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13575 return target_proc
;
13579 /* Resolve a type-bound intrinsic operator. */
13582 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13583 gfc_typebound_proc
* p
)
13585 gfc_symbol
* super_type
;
13586 gfc_tbp_generic
* target
;
13588 /* If there's already an error here, do nothing (but don't fail again). */
13592 /* Operators should always be GENERIC bindings. */
13593 gcc_assert (p
->is_generic
);
13595 /* Look for an overridden binding. */
13596 super_type
= gfc_get_derived_super_type (derived
);
13597 if (super_type
&& super_type
->f2k_derived
)
13598 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13601 p
->overridden
= NULL
;
13603 /* Resolve general GENERIC properties using worker function. */
13604 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13607 /* Check the targets to be procedures of correct interface. */
13608 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13610 gfc_symbol
* target_proc
;
13612 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13616 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13619 /* Add target to non-typebound operator list. */
13620 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13621 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13623 gfc_interface
*head
, *intr
;
13625 /* Preempt 'gfc_check_new_interface' for submodules, where the
13626 mechanism for handling module procedures winds up resolving
13627 operator interfaces twice and would otherwise cause an error. */
13628 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13629 if (intr
->sym
== target_proc
13630 && target_proc
->attr
.used_in_submodule
)
13633 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13634 target_proc
, p
->where
))
13636 head
= derived
->ns
->op
[op
];
13637 intr
= gfc_get_interface ();
13638 intr
->sym
= target_proc
;
13639 intr
->where
= p
->where
;
13641 derived
->ns
->op
[op
] = intr
;
13653 /* Resolve a type-bound user operator (tree-walker callback). */
13655 static gfc_symbol
* resolve_bindings_derived
;
13656 static bool resolve_bindings_result
;
13658 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13661 resolve_typebound_user_op (gfc_symtree
* stree
)
13663 gfc_symbol
* super_type
;
13664 gfc_tbp_generic
* target
;
13666 gcc_assert (stree
&& stree
->n
.tb
);
13668 if (stree
->n
.tb
->error
)
13671 /* Operators should always be GENERIC bindings. */
13672 gcc_assert (stree
->n
.tb
->is_generic
);
13674 /* Find overridden procedure, if any. */
13675 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13676 if (super_type
&& super_type
->f2k_derived
)
13678 gfc_symtree
* overridden
;
13679 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13680 stree
->name
, true, NULL
);
13682 if (overridden
&& overridden
->n
.tb
)
13683 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13686 stree
->n
.tb
->overridden
= NULL
;
13688 /* Resolve basically using worker function. */
13689 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13692 /* Check the targets to be functions of correct interface. */
13693 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13695 gfc_symbol
* target_proc
;
13697 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13701 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13708 resolve_bindings_result
= false;
13709 stree
->n
.tb
->error
= 1;
13713 /* Resolve the type-bound procedures for a derived type. */
13716 resolve_typebound_procedure (gfc_symtree
* stree
)
13720 gfc_symbol
* me_arg
;
13721 gfc_symbol
* super_type
;
13722 gfc_component
* comp
;
13724 gcc_assert (stree
);
13726 /* Undefined specific symbol from GENERIC target definition. */
13730 if (stree
->n
.tb
->error
)
13733 /* If this is a GENERIC binding, use that routine. */
13734 if (stree
->n
.tb
->is_generic
)
13736 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13741 /* Get the target-procedure to check it. */
13742 gcc_assert (!stree
->n
.tb
->is_generic
);
13743 gcc_assert (stree
->n
.tb
->u
.specific
);
13744 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13745 where
= stree
->n
.tb
->where
;
13747 /* Default access should already be resolved from the parser. */
13748 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13750 if (stree
->n
.tb
->deferred
)
13752 if (!check_proc_interface (proc
, &where
))
13757 /* If proc has not been resolved at this point, proc->name may
13758 actually be a USE associated entity. See PR fortran/89647. */
13759 if (!proc
->resolved
13760 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13763 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13764 if (tmp
&& tmp
->attr
.use_assoc
)
13766 proc
->module
= tmp
->module
;
13767 proc
->attr
.proc
= tmp
->attr
.proc
;
13768 proc
->attr
.function
= tmp
->attr
.function
;
13769 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13770 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13771 proc
->ts
= tmp
->ts
;
13772 proc
->result
= tmp
->result
;
13776 /* Check for F08:C465. */
13777 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13778 || (proc
->attr
.proc
!= PROC_MODULE
13779 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13780 || proc
->attr
.abstract
)
13782 gfc_error ("%qs must be a module procedure or an external "
13783 "procedure with an explicit interface at %L",
13784 proc
->name
, &where
);
13789 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13790 stree
->n
.tb
->function
= proc
->attr
.function
;
13792 /* Find the super-type of the current derived type. We could do this once and
13793 store in a global if speed is needed, but as long as not I believe this is
13794 more readable and clearer. */
13795 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13797 /* If PASS, resolve and check arguments if not already resolved / loaded
13798 from a .mod file. */
13799 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13801 gfc_formal_arglist
*dummy_args
;
13803 dummy_args
= gfc_sym_get_dummy_args (proc
);
13804 if (stree
->n
.tb
->pass_arg
)
13806 gfc_formal_arglist
*i
;
13808 /* If an explicit passing argument name is given, walk the arg-list
13809 and look for it. */
13812 stree
->n
.tb
->pass_arg_num
= 1;
13813 for (i
= dummy_args
; i
; i
= i
->next
)
13815 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13820 ++stree
->n
.tb
->pass_arg_num
;
13825 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13827 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13828 stree
->n
.tb
->pass_arg
);
13834 /* Otherwise, take the first one; there should in fact be at least
13836 stree
->n
.tb
->pass_arg_num
= 1;
13839 gfc_error ("Procedure %qs with PASS at %L must have at"
13840 " least one argument", proc
->name
, &where
);
13843 me_arg
= dummy_args
->sym
;
13846 /* Now check that the argument-type matches and the passed-object
13847 dummy argument is generally fine. */
13849 gcc_assert (me_arg
);
13851 if (me_arg
->ts
.type
!= BT_CLASS
)
13853 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13854 " at %L", proc
->name
, &where
);
13858 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13859 != resolve_bindings_derived
)
13861 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13862 " the derived-type %qs", me_arg
->name
, proc
->name
,
13863 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13867 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13868 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13870 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13871 " scalar", proc
->name
, &where
);
13874 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13876 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13877 " be ALLOCATABLE", proc
->name
, &where
);
13880 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13882 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13883 " be POINTER", proc
->name
, &where
);
13888 /* If we are extending some type, check that we don't override a procedure
13889 flagged NON_OVERRIDABLE. */
13890 stree
->n
.tb
->overridden
= NULL
;
13893 gfc_symtree
* overridden
;
13894 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13895 stree
->name
, true, NULL
);
13899 if (overridden
->n
.tb
)
13900 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13902 if (!gfc_check_typebound_override (stree
, overridden
))
13907 /* See if there's a name collision with a component directly in this type. */
13908 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13909 if (!strcmp (comp
->name
, stree
->name
))
13911 gfc_error ("Procedure %qs at %L has the same name as a component of"
13913 stree
->name
, &where
, resolve_bindings_derived
->name
);
13917 /* Try to find a name collision with an inherited component. */
13918 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13921 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13922 " component of %qs",
13923 stree
->name
, &where
, resolve_bindings_derived
->name
);
13927 stree
->n
.tb
->error
= 0;
13931 resolve_bindings_result
= false;
13932 stree
->n
.tb
->error
= 1;
13937 resolve_typebound_procedures (gfc_symbol
* derived
)
13940 gfc_symbol
* super_type
;
13942 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13945 super_type
= gfc_get_derived_super_type (derived
);
13947 resolve_symbol (super_type
);
13949 resolve_bindings_derived
= derived
;
13950 resolve_bindings_result
= true;
13952 if (derived
->f2k_derived
->tb_sym_root
)
13953 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13954 &resolve_typebound_procedure
);
13956 if (derived
->f2k_derived
->tb_uop_root
)
13957 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13958 &resolve_typebound_user_op
);
13960 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13962 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13963 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13964 (gfc_intrinsic_op
)op
, p
))
13965 resolve_bindings_result
= false;
13968 return resolve_bindings_result
;
13972 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13973 to give all identical derived types the same backend_decl. */
13975 add_dt_to_dt_list (gfc_symbol
*derived
)
13977 if (!derived
->dt_next
)
13979 if (gfc_derived_types
)
13981 derived
->dt_next
= gfc_derived_types
->dt_next
;
13982 gfc_derived_types
->dt_next
= derived
;
13986 derived
->dt_next
= derived
;
13988 gfc_derived_types
= derived
;
13993 /* Ensure that a derived-type is really not abstract, meaning that every
13994 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13997 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14002 if (!ensure_not_abstract_walker (sub
, st
->left
))
14004 if (!ensure_not_abstract_walker (sub
, st
->right
))
14007 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14009 gfc_symtree
* overriding
;
14010 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14013 gcc_assert (overriding
->n
.tb
);
14014 if (overriding
->n
.tb
->deferred
)
14016 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14017 " %qs is DEFERRED and not overridden",
14018 sub
->name
, &sub
->declared_at
, st
->name
);
14027 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14029 /* The algorithm used here is to recursively travel up the ancestry of sub
14030 and for each ancestor-type, check all bindings. If any of them is
14031 DEFERRED, look it up starting from sub and see if the found (overriding)
14032 binding is not DEFERRED.
14033 This is not the most efficient way to do this, but it should be ok and is
14034 clearer than something sophisticated. */
14036 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14038 if (!ancestor
->attr
.abstract
)
14041 /* Walk bindings of this ancestor. */
14042 if (ancestor
->f2k_derived
)
14045 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14050 /* Find next ancestor type and recurse on it. */
14051 ancestor
= gfc_get_derived_super_type (ancestor
);
14053 return ensure_not_abstract (sub
, ancestor
);
14059 /* This check for typebound defined assignments is done recursively
14060 since the order in which derived types are resolved is not always in
14061 order of the declarations. */
14064 check_defined_assignments (gfc_symbol
*derived
)
14068 for (c
= derived
->components
; c
; c
= c
->next
)
14070 if (!gfc_bt_struct (c
->ts
.type
)
14072 || c
->attr
.allocatable
14073 || c
->attr
.proc_pointer_comp
14074 || c
->attr
.class_pointer
14075 || c
->attr
.proc_pointer
)
14078 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14079 || (c
->ts
.u
.derived
->f2k_derived
14080 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14082 derived
->attr
.defined_assign_comp
= 1;
14086 check_defined_assignments (c
->ts
.u
.derived
);
14087 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14089 derived
->attr
.defined_assign_comp
= 1;
14096 /* Resolve a single component of a derived type or structure. */
14099 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14101 gfc_symbol
*super_type
;
14102 symbol_attribute
*attr
;
14104 if (c
->attr
.artificial
)
14107 /* Do not allow vtype components to be resolved in nameless namespaces
14108 such as block data because the procedure pointers will cause ICEs
14109 and vtables are not needed in these contexts. */
14110 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14111 && sym
->ns
->proc_name
== NULL
)
14115 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14116 && c
->attr
.codimension
14117 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14119 gfc_error ("Coarray component %qs at %L must be allocatable with "
14120 "deferred shape", c
->name
, &c
->loc
);
14125 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14126 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14128 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14129 "shall not be a coarray", c
->name
, &c
->loc
);
14134 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14135 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14136 || c
->attr
.allocatable
))
14138 gfc_error ("Component %qs at %L with coarray component "
14139 "shall be a nonpointer, nonallocatable scalar",
14145 if (c
->ts
.type
== BT_CLASS
)
14147 if (CLASS_DATA (c
))
14149 attr
= &(CLASS_DATA (c
)->attr
);
14151 /* Fix up contiguous attribute. */
14152 if (c
->attr
.contiguous
)
14153 attr
->contiguous
= 1;
14161 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14163 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14164 "is not an array pointer", c
->name
, &c
->loc
);
14168 /* F2003, 15.2.1 - length has to be one. */
14169 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14170 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14171 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14172 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14174 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14179 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14181 gfc_symbol
*ifc
= c
->ts
.interface
;
14183 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14189 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14191 /* Resolve interface and copy attributes. */
14192 if (ifc
->formal
&& !ifc
->formal_ns
)
14193 resolve_symbol (ifc
);
14194 if (ifc
->attr
.intrinsic
)
14195 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14199 c
->ts
= ifc
->result
->ts
;
14200 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14201 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14202 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14203 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14204 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14209 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14210 c
->attr
.pointer
= ifc
->attr
.pointer
;
14211 c
->attr
.dimension
= ifc
->attr
.dimension
;
14212 c
->as
= gfc_copy_array_spec (ifc
->as
);
14213 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14215 c
->ts
.interface
= ifc
;
14216 c
->attr
.function
= ifc
->attr
.function
;
14217 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14219 c
->attr
.pure
= ifc
->attr
.pure
;
14220 c
->attr
.elemental
= ifc
->attr
.elemental
;
14221 c
->attr
.recursive
= ifc
->attr
.recursive
;
14222 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14223 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14224 /* Copy char length. */
14225 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14227 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14228 if (cl
->length
&& !cl
->resolved
14229 && !gfc_resolve_expr (cl
->length
))
14238 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14240 /* Since PPCs are not implicitly typed, a PPC without an explicit
14241 interface must be a subroutine. */
14242 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14245 /* Procedure pointer components: Check PASS arg. */
14246 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14247 && !sym
->attr
.vtype
)
14249 gfc_symbol
* me_arg
;
14251 if (c
->tb
->pass_arg
)
14253 gfc_formal_arglist
* i
;
14255 /* If an explicit passing argument name is given, walk the arg-list
14256 and look for it. */
14259 c
->tb
->pass_arg_num
= 1;
14260 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14262 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14267 c
->tb
->pass_arg_num
++;
14272 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14273 "at %L has no argument %qs", c
->name
,
14274 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14281 /* Otherwise, take the first one; there should in fact be at least
14283 c
->tb
->pass_arg_num
= 1;
14284 if (!c
->ts
.interface
->formal
)
14286 gfc_error ("Procedure pointer component %qs with PASS at %L "
14287 "must have at least one argument",
14292 me_arg
= c
->ts
.interface
->formal
->sym
;
14295 /* Now check that the argument-type matches. */
14296 gcc_assert (me_arg
);
14297 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14298 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14299 || (me_arg
->ts
.type
== BT_CLASS
14300 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14302 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14303 " the derived type %qs", me_arg
->name
, c
->name
,
14304 me_arg
->name
, &c
->loc
, sym
->name
);
14309 /* Check for F03:C453. */
14310 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14312 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14313 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14319 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14321 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14322 "may not have the POINTER attribute", me_arg
->name
,
14323 c
->name
, me_arg
->name
, &c
->loc
);
14328 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14330 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14331 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14332 me_arg
->name
, &c
->loc
);
14337 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14339 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14340 " at %L", c
->name
, &c
->loc
);
14346 /* Check type-spec if this is not the parent-type component. */
14347 if (((sym
->attr
.is_class
14348 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14349 || c
!= sym
->components
->ts
.u
.derived
->components
))
14350 || (!sym
->attr
.is_class
14351 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14352 && !sym
->attr
.vtype
14353 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14356 super_type
= gfc_get_derived_super_type (sym
);
14358 /* If this type is an extension, set the accessibility of the parent
14361 && ((sym
->attr
.is_class
14362 && c
== sym
->components
->ts
.u
.derived
->components
)
14363 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14364 && strcmp (super_type
->name
, c
->name
) == 0)
14365 c
->attr
.access
= super_type
->attr
.access
;
14367 /* If this type is an extension, see if this component has the same name
14368 as an inherited type-bound procedure. */
14369 if (super_type
&& !sym
->attr
.is_class
14370 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14372 gfc_error ("Component %qs of %qs at %L has the same name as an"
14373 " inherited type-bound procedure",
14374 c
->name
, sym
->name
, &c
->loc
);
14378 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14379 && !c
->ts
.deferred
)
14381 if (c
->ts
.u
.cl
->length
== NULL
14382 || (!resolve_charlen(c
->ts
.u
.cl
))
14383 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14385 gfc_error ("Character length of component %qs needs to "
14386 "be a constant specification expression at %L",
14388 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14393 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14394 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14396 gfc_error ("Character component %qs of %qs at %L with deferred "
14397 "length must be a POINTER or ALLOCATABLE",
14398 c
->name
, sym
->name
, &c
->loc
);
14402 /* Add the hidden deferred length field. */
14403 if (c
->ts
.type
== BT_CHARACTER
14404 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14405 && !c
->attr
.function
14406 && !sym
->attr
.is_class
)
14408 char name
[GFC_MAX_SYMBOL_LEN
+9];
14409 gfc_component
*strlen
;
14410 sprintf (name
, "_%s_length", c
->name
);
14411 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14412 if (strlen
== NULL
)
14414 if (!gfc_add_component (sym
, name
, &strlen
))
14416 strlen
->ts
.type
= BT_INTEGER
;
14417 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14418 strlen
->attr
.access
= ACCESS_PRIVATE
;
14419 strlen
->attr
.artificial
= 1;
14423 if (c
->ts
.type
== BT_DERIVED
14424 && sym
->component_access
!= ACCESS_PRIVATE
14425 && gfc_check_symbol_access (sym
)
14426 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14427 && !c
->ts
.u
.derived
->attr
.use_assoc
14428 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14429 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14430 "PRIVATE type and cannot be a component of "
14431 "%qs, which is PUBLIC at %L", c
->name
,
14432 sym
->name
, &sym
->declared_at
))
14435 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14437 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14438 "type %s", c
->name
, &c
->loc
, sym
->name
);
14442 if (sym
->attr
.sequence
)
14444 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14446 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14447 "not have the SEQUENCE attribute",
14448 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14453 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14454 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14455 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14456 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14457 CLASS_DATA (c
)->ts
.u
.derived
14458 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14460 /* If an allocatable component derived type is of the same type as
14461 the enclosing derived type, we need a vtable generating so that
14462 the __deallocate procedure is created. */
14463 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14464 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14465 gfc_find_vtab (&c
->ts
);
14467 /* Ensure that all the derived type components are put on the
14468 derived type list; even in formal namespaces, where derived type
14469 pointer components might not have been declared. */
14470 if (c
->ts
.type
== BT_DERIVED
14472 && c
->ts
.u
.derived
->components
14474 && sym
!= c
->ts
.u
.derived
)
14475 add_dt_to_dt_list (c
->ts
.u
.derived
);
14477 if (!gfc_resolve_array_spec (c
->as
,
14478 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14479 || c
->attr
.allocatable
)))
14482 if (c
->initializer
&& !sym
->attr
.vtype
14483 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14484 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14491 /* Be nice about the locus for a structure expression - show the locus of the
14492 first non-null sub-expression if we can. */
14495 cons_where (gfc_expr
*struct_expr
)
14497 gfc_constructor
*cons
;
14499 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14501 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14502 for (; cons
; cons
= gfc_constructor_next (cons
))
14504 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14505 return &cons
->expr
->where
;
14508 return &struct_expr
->where
;
14511 /* Resolve the components of a structure type. Much less work than derived
14515 resolve_fl_struct (gfc_symbol
*sym
)
14518 gfc_expr
*init
= NULL
;
14521 /* Make sure UNIONs do not have overlapping initializers. */
14522 if (sym
->attr
.flavor
== FL_UNION
)
14524 for (c
= sym
->components
; c
; c
= c
->next
)
14526 if (init
&& c
->initializer
)
14528 gfc_error ("Conflicting initializers in union at %L and %L",
14529 cons_where (init
), cons_where (c
->initializer
));
14530 gfc_free_expr (c
->initializer
);
14531 c
->initializer
= NULL
;
14534 init
= c
->initializer
;
14539 for (c
= sym
->components
; c
; c
= c
->next
)
14540 if (!resolve_component (c
, sym
))
14546 if (sym
->components
)
14547 add_dt_to_dt_list (sym
);
14553 /* Resolve the components of a derived type. This does not have to wait until
14554 resolution stage, but can be done as soon as the dt declaration has been
14558 resolve_fl_derived0 (gfc_symbol
*sym
)
14560 gfc_symbol
* super_type
;
14562 gfc_formal_arglist
*f
;
14565 if (sym
->attr
.unlimited_polymorphic
)
14568 super_type
= gfc_get_derived_super_type (sym
);
14571 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14573 gfc_error ("As extending type %qs at %L has a coarray component, "
14574 "parent type %qs shall also have one", sym
->name
,
14575 &sym
->declared_at
, super_type
->name
);
14579 /* Ensure the extended type gets resolved before we do. */
14580 if (super_type
&& !resolve_fl_derived0 (super_type
))
14583 /* An ABSTRACT type must be extensible. */
14584 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14586 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14587 sym
->name
, &sym
->declared_at
);
14591 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14595 for ( ; c
!= NULL
; c
= c
->next
)
14596 if (!resolve_component (c
, sym
))
14602 /* Now add the caf token field, where needed. */
14603 if (flag_coarray
!= GFC_FCOARRAY_NONE
14604 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14606 for (c
= sym
->components
; c
; c
= c
->next
)
14607 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14608 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14610 char name
[GFC_MAX_SYMBOL_LEN
+9];
14611 gfc_component
*token
;
14612 sprintf (name
, "_caf_%s", c
->name
);
14613 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14616 if (!gfc_add_component (sym
, name
, &token
))
14618 token
->ts
.type
= BT_VOID
;
14619 token
->ts
.kind
= gfc_default_integer_kind
;
14620 token
->attr
.access
= ACCESS_PRIVATE
;
14621 token
->attr
.artificial
= 1;
14622 token
->attr
.caf_token
= 1;
14627 check_defined_assignments (sym
);
14629 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14630 sym
->attr
.defined_assign_comp
14631 = super_type
->attr
.defined_assign_comp
;
14633 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14634 all DEFERRED bindings are overridden. */
14635 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14636 && !sym
->attr
.is_class
14637 && !ensure_not_abstract (sym
, super_type
))
14640 /* Check that there is a component for every PDT parameter. */
14641 if (sym
->attr
.pdt_template
)
14643 for (f
= sym
->formal
; f
; f
= f
->next
)
14647 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14650 gfc_error ("Parameterized type %qs does not have a component "
14651 "corresponding to parameter %qs at %L", sym
->name
,
14652 f
->sym
->name
, &sym
->declared_at
);
14658 /* Add derived type to the derived type list. */
14659 add_dt_to_dt_list (sym
);
14665 /* The following procedure does the full resolution of a derived type,
14666 including resolution of all type-bound procedures (if present). In contrast
14667 to 'resolve_fl_derived0' this can only be done after the module has been
14668 parsed completely. */
14671 resolve_fl_derived (gfc_symbol
*sym
)
14673 gfc_symbol
*gen_dt
= NULL
;
14675 if (sym
->attr
.unlimited_polymorphic
)
14678 if (!sym
->attr
.is_class
)
14679 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14680 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14681 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14682 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14683 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14684 "%qs at %L being the same name as derived "
14685 "type at %L", sym
->name
,
14686 gen_dt
->generic
->sym
== sym
14687 ? gen_dt
->generic
->next
->sym
->name
14688 : gen_dt
->generic
->sym
->name
,
14689 gen_dt
->generic
->sym
== sym
14690 ? &gen_dt
->generic
->next
->sym
->declared_at
14691 : &gen_dt
->generic
->sym
->declared_at
,
14692 &sym
->declared_at
))
14695 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14697 gfc_error ("Derived type %qs at %L has not been declared",
14698 sym
->name
, &sym
->declared_at
);
14702 /* Resolve the finalizer procedures. */
14703 if (!gfc_resolve_finalizers (sym
, NULL
))
14706 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14708 /* Fix up incomplete CLASS symbols. */
14709 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14710 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14712 /* Nothing more to do for unlimited polymorphic entities. */
14713 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14715 else if (vptr
->ts
.u
.derived
== NULL
)
14717 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14719 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14720 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14725 if (!resolve_fl_derived0 (sym
))
14728 /* Resolve the type-bound procedures. */
14729 if (!resolve_typebound_procedures (sym
))
14732 /* Generate module vtables subject to their accessibility and their not
14733 being vtables or pdt templates. If this is not done class declarations
14734 in external procedures wind up with their own version and so SELECT TYPE
14735 fails because the vptrs do not have the same address. */
14736 if (gfc_option
.allow_std
& GFC_STD_F2003
14737 && sym
->ns
->proc_name
14738 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14739 && sym
->attr
.access
!= ACCESS_PRIVATE
14740 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14742 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14743 gfc_set_sym_referenced (vtab
);
14751 resolve_fl_namelist (gfc_symbol
*sym
)
14756 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14758 /* Check again, the check in match only works if NAMELIST comes
14760 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14762 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14763 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14767 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14768 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14769 "with assumed shape in namelist %qs at %L",
14770 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14773 if (is_non_constant_shape_array (nl
->sym
)
14774 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14775 "with nonconstant shape in namelist %qs at %L",
14776 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14779 if (nl
->sym
->ts
.type
== BT_CHARACTER
14780 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14781 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14782 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14783 "nonconstant character length in "
14784 "namelist %qs at %L", nl
->sym
->name
,
14785 sym
->name
, &sym
->declared_at
))
14790 /* Reject PRIVATE objects in a PUBLIC namelist. */
14791 if (gfc_check_symbol_access (sym
))
14793 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14795 if (!nl
->sym
->attr
.use_assoc
14796 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14797 && !gfc_check_symbol_access (nl
->sym
))
14799 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14800 "cannot be member of PUBLIC namelist %qs at %L",
14801 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14805 if (nl
->sym
->ts
.type
== BT_DERIVED
14806 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14807 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14809 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14810 "namelist %qs at %L with ALLOCATABLE "
14811 "or POINTER components", nl
->sym
->name
,
14812 sym
->name
, &sym
->declared_at
))
14817 /* Types with private components that came here by USE-association. */
14818 if (nl
->sym
->ts
.type
== BT_DERIVED
14819 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14821 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14822 "components and cannot be member of namelist %qs at %L",
14823 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14827 /* Types with private components that are defined in the same module. */
14828 if (nl
->sym
->ts
.type
== BT_DERIVED
14829 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14830 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14832 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14833 "cannot be a member of PUBLIC namelist %qs at %L",
14834 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14841 /* 14.1.2 A module or internal procedure represent local entities
14842 of the same type as a namelist member and so are not allowed. */
14843 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14845 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14848 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14849 if ((nl
->sym
== sym
->ns
->proc_name
)
14851 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14856 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14857 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14859 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14860 "attribute in %qs at %L", nlsym
->name
,
14861 &sym
->declared_at
);
14868 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14869 nl
->sym
->attr
.asynchronous
= 1;
14876 resolve_fl_parameter (gfc_symbol
*sym
)
14878 /* A parameter array's shape needs to be constant. */
14879 if (sym
->as
!= NULL
14880 && (sym
->as
->type
== AS_DEFERRED
14881 || is_non_constant_shape_array (sym
)))
14883 gfc_error ("Parameter array %qs at %L cannot be automatic "
14884 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14888 /* Constraints on deferred type parameter. */
14889 if (!deferred_requirements (sym
))
14892 /* Make sure a parameter that has been implicitly typed still
14893 matches the implicit type, since PARAMETER statements can precede
14894 IMPLICIT statements. */
14895 if (sym
->attr
.implicit_type
14896 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14899 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14900 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14904 /* Make sure the types of derived parameters are consistent. This
14905 type checking is deferred until resolution because the type may
14906 refer to a derived type from the host. */
14907 if (sym
->ts
.type
== BT_DERIVED
14908 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14910 gfc_error ("Incompatible derived type in PARAMETER at %L",
14911 &sym
->value
->where
);
14915 /* F03:C509,C514. */
14916 if (sym
->ts
.type
== BT_CLASS
)
14918 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14919 sym
->name
, &sym
->declared_at
);
14927 /* Called by resolve_symbol to check PDTs. */
14930 resolve_pdt (gfc_symbol
* sym
)
14932 gfc_symbol
*derived
= NULL
;
14933 gfc_actual_arglist
*param
;
14935 bool const_len_exprs
= true;
14936 bool assumed_len_exprs
= false;
14937 symbol_attribute
*attr
;
14939 if (sym
->ts
.type
== BT_DERIVED
)
14941 derived
= sym
->ts
.u
.derived
;
14942 attr
= &(sym
->attr
);
14944 else if (sym
->ts
.type
== BT_CLASS
)
14946 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14947 attr
= &(CLASS_DATA (sym
)->attr
);
14950 gcc_unreachable ();
14952 gcc_assert (derived
->attr
.pdt_type
);
14954 for (param
= sym
->param_list
; param
; param
= param
->next
)
14956 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14958 if (c
->attr
.pdt_kind
)
14961 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14962 && c
->attr
.pdt_len
)
14963 const_len_exprs
= false;
14964 else if (param
->spec_type
== SPEC_ASSUMED
)
14965 assumed_len_exprs
= true;
14967 if (param
->spec_type
== SPEC_DEFERRED
14968 && !attr
->allocatable
&& !attr
->pointer
)
14969 gfc_error ("The object %qs at %L has a deferred LEN "
14970 "parameter %qs and is neither allocatable "
14971 "nor a pointer", sym
->name
, &sym
->declared_at
,
14976 if (!const_len_exprs
14977 && (sym
->ns
->proc_name
->attr
.is_main_program
14978 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14979 || sym
->attr
.save
!= SAVE_NONE
))
14980 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14981 "SAVE attribute or be a variable declared in the "
14982 "main program, a module or a submodule(F08/C513)",
14983 sym
->name
, &sym
->declared_at
);
14985 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14986 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14987 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14988 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14989 sym
->name
, &sym
->declared_at
);
14993 /* Do anything necessary to resolve a symbol. Right now, we just
14994 assume that an otherwise unknown symbol is a variable. This sort
14995 of thing commonly happens for symbols in module. */
14998 resolve_symbol (gfc_symbol
*sym
)
15000 int check_constant
, mp_flag
;
15001 gfc_symtree
*symtree
;
15002 gfc_symtree
*this_symtree
;
15005 symbol_attribute class_attr
;
15006 gfc_array_spec
*as
;
15007 bool saved_specification_expr
;
15013 /* No symbol will ever have union type; only components can be unions.
15014 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15015 (just like derived type declaration symbols have flavor FL_DERIVED). */
15016 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15018 /* Coarrayed polymorphic objects with allocatable or pointer components are
15019 yet unsupported for -fcoarray=lib. */
15020 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15021 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15022 && CLASS_DATA (sym
)->attr
.codimension
15023 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15024 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15026 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15027 "type coarrays at %L are unsupported", &sym
->declared_at
);
15031 if (sym
->attr
.artificial
)
15034 if (sym
->attr
.unlimited_polymorphic
)
15037 if (sym
->attr
.flavor
== FL_UNKNOWN
15038 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15039 && !sym
->attr
.generic
&& !sym
->attr
.external
15040 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15041 && sym
->ts
.type
== BT_UNKNOWN
))
15044 /* If we find that a flavorless symbol is an interface in one of the
15045 parent namespaces, find its symtree in this namespace, free the
15046 symbol and set the symtree to point to the interface symbol. */
15047 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15049 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15050 if (symtree
&& (symtree
->n
.sym
->generic
||
15051 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15052 && sym
->ns
->construct_entities
)))
15054 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15056 if (this_symtree
->n
.sym
== sym
)
15058 symtree
->n
.sym
->refs
++;
15059 gfc_release_symbol (sym
);
15060 this_symtree
->n
.sym
= symtree
->n
.sym
;
15066 /* Otherwise give it a flavor according to such attributes as
15068 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15069 && sym
->attr
.intrinsic
== 0)
15070 sym
->attr
.flavor
= FL_VARIABLE
;
15071 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15073 sym
->attr
.flavor
= FL_PROCEDURE
;
15074 if (sym
->attr
.dimension
)
15075 sym
->attr
.function
= 1;
15079 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15080 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15082 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15083 && !resolve_procedure_interface (sym
))
15086 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15087 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15089 if (sym
->attr
.external
)
15090 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15091 "at %L", &sym
->declared_at
);
15093 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15094 "at %L", &sym
->declared_at
);
15099 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15102 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15103 && !resolve_fl_struct (sym
))
15106 /* Symbols that are module procedures with results (functions) have
15107 the types and array specification copied for type checking in
15108 procedures that call them, as well as for saving to a module
15109 file. These symbols can't stand the scrutiny that their results
15111 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15113 /* Make sure that the intrinsic is consistent with its internal
15114 representation. This needs to be done before assigning a default
15115 type to avoid spurious warnings. */
15116 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15117 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15120 /* Resolve associate names. */
15122 resolve_assoc_var (sym
, true);
15124 /* Assign default type to symbols that need one and don't have one. */
15125 if (sym
->ts
.type
== BT_UNKNOWN
)
15127 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15129 gfc_set_default_type (sym
, 1, NULL
);
15132 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15133 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15134 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15135 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15137 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15139 /* The specific case of an external procedure should emit an error
15140 in the case that there is no implicit type. */
15143 if (!sym
->attr
.mixed_entry_master
)
15144 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15148 /* Result may be in another namespace. */
15149 resolve_symbol (sym
->result
);
15151 if (!sym
->result
->attr
.proc_pointer
)
15153 sym
->ts
= sym
->result
->ts
;
15154 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15155 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15156 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15157 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15158 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15163 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15165 bool saved_specification_expr
= specification_expr
;
15166 specification_expr
= true;
15167 gfc_resolve_array_spec (sym
->result
->as
, false);
15168 specification_expr
= saved_specification_expr
;
15171 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15173 as
= CLASS_DATA (sym
)->as
;
15174 class_attr
= CLASS_DATA (sym
)->attr
;
15175 class_attr
.pointer
= class_attr
.class_pointer
;
15179 class_attr
= sym
->attr
;
15184 if (sym
->attr
.contiguous
15185 && (!class_attr
.dimension
15186 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15187 && !class_attr
.pointer
)))
15189 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15190 "array pointer or an assumed-shape or assumed-rank array",
15191 sym
->name
, &sym
->declared_at
);
15195 /* Assumed size arrays and assumed shape arrays must be dummy
15196 arguments. Array-spec's of implied-shape should have been resolved to
15197 AS_EXPLICIT already. */
15201 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15202 specification expression. */
15203 if (as
->type
== AS_IMPLIED_SHAPE
)
15206 for (i
=0; i
<as
->rank
; i
++)
15208 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15210 gfc_error ("Bad specification for assumed size array at %L",
15211 &as
->lower
[i
]->where
);
15218 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15219 || as
->type
== AS_ASSUMED_SHAPE
)
15220 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15222 if (as
->type
== AS_ASSUMED_SIZE
)
15223 gfc_error ("Assumed size array at %L must be a dummy argument",
15224 &sym
->declared_at
);
15226 gfc_error ("Assumed shape array at %L must be a dummy argument",
15227 &sym
->declared_at
);
15230 /* TS 29113, C535a. */
15231 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15232 && !sym
->attr
.select_type_temporary
15233 && !(cs_base
&& cs_base
->current
15234 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15236 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15237 &sym
->declared_at
);
15240 if (as
->type
== AS_ASSUMED_RANK
15241 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15243 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15244 "CODIMENSION attribute", &sym
->declared_at
);
15249 /* Make sure symbols with known intent or optional are really dummy
15250 variable. Because of ENTRY statement, this has to be deferred
15251 until resolution time. */
15253 if (!sym
->attr
.dummy
15254 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15256 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15260 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15262 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15263 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15267 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15269 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15270 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15272 gfc_error ("Character dummy variable %qs at %L with VALUE "
15273 "attribute must have constant length",
15274 sym
->name
, &sym
->declared_at
);
15278 if (sym
->ts
.is_c_interop
15279 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15281 gfc_error ("C interoperable character dummy variable %qs at %L "
15282 "with VALUE attribute must have length one",
15283 sym
->name
, &sym
->declared_at
);
15288 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15289 && sym
->ts
.u
.derived
->attr
.generic
)
15291 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15292 if (!sym
->ts
.u
.derived
)
15294 gfc_error ("The derived type %qs at %L is of type %qs, "
15295 "which has not been defined", sym
->name
,
15296 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15297 sym
->ts
.type
= BT_UNKNOWN
;
15302 /* Use the same constraints as TYPE(*), except for the type check
15303 and that only scalars and assumed-size arrays are permitted. */
15304 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15306 if (!sym
->attr
.dummy
)
15308 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15309 "a dummy argument", sym
->name
, &sym
->declared_at
);
15313 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15314 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15315 && sym
->ts
.type
!= BT_COMPLEX
)
15317 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15318 "of type TYPE(*) or of an numeric intrinsic type",
15319 sym
->name
, &sym
->declared_at
);
15323 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15324 || sym
->attr
.pointer
|| sym
->attr
.value
)
15326 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15327 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15328 "attribute", sym
->name
, &sym
->declared_at
);
15332 if (sym
->attr
.intent
== INTENT_OUT
)
15334 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15335 "have the INTENT(OUT) attribute",
15336 sym
->name
, &sym
->declared_at
);
15339 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15341 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15342 "either be a scalar or an assumed-size array",
15343 sym
->name
, &sym
->declared_at
);
15347 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15348 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15350 sym
->ts
.type
= BT_ASSUMED
;
15351 sym
->as
= gfc_get_array_spec ();
15352 sym
->as
->type
= AS_ASSUMED_SIZE
;
15354 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15356 else if (sym
->ts
.type
== BT_ASSUMED
)
15358 /* TS 29113, C407a. */
15359 if (!sym
->attr
.dummy
)
15361 gfc_error ("Assumed type of variable %s at %L is only permitted "
15362 "for dummy variables", sym
->name
, &sym
->declared_at
);
15365 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15366 || sym
->attr
.pointer
|| sym
->attr
.value
)
15368 gfc_error ("Assumed-type variable %s at %L may not have the "
15369 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15370 sym
->name
, &sym
->declared_at
);
15373 if (sym
->attr
.intent
== INTENT_OUT
)
15375 gfc_error ("Assumed-type variable %s at %L may not have the "
15376 "INTENT(OUT) attribute",
15377 sym
->name
, &sym
->declared_at
);
15380 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15382 gfc_error ("Assumed-type variable %s at %L shall not be an "
15383 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15388 /* If the symbol is marked as bind(c), that it is declared at module level
15389 scope and verify its type and kind. Do not do the latter for symbols
15390 that are implicitly typed because that is handled in
15391 gfc_set_default_type. Handle dummy arguments and procedure definitions
15392 separately. Also, anything that is use associated is not handled here
15393 but instead is handled in the module it is declared in. Finally, derived
15394 type definitions are allowed to be BIND(C) since that only implies that
15395 they're interoperable, and they are checked fully for interoperability
15396 when a variable is declared of that type. */
15397 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15398 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15399 && sym
->attr
.flavor
!= FL_DERIVED
)
15403 /* First, make sure the variable is declared at the
15404 module-level scope (J3/04-007, Section 15.3). */
15405 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15406 sym
->attr
.in_common
== 0)
15408 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15409 "is neither a COMMON block nor declared at the "
15410 "module level scope", sym
->name
, &(sym
->declared_at
));
15413 else if (sym
->ts
.type
== BT_CHARACTER
15414 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15415 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15416 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15418 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15419 sym
->name
, &sym
->declared_at
);
15422 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15424 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15426 else if (sym
->attr
.implicit_type
== 0)
15428 /* If type() declaration, we need to verify that the components
15429 of the given type are all C interoperable, etc. */
15430 if (sym
->ts
.type
== BT_DERIVED
&&
15431 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15433 /* Make sure the user marked the derived type as BIND(C). If
15434 not, call the verify routine. This could print an error
15435 for the derived type more than once if multiple variables
15436 of that type are declared. */
15437 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15438 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15442 /* Verify the variable itself as C interoperable if it
15443 is BIND(C). It is not possible for this to succeed if
15444 the verify_bind_c_derived_type failed, so don't have to handle
15445 any error returned by verify_bind_c_derived_type. */
15446 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15447 sym
->common_block
);
15452 /* clear the is_bind_c flag to prevent reporting errors more than
15453 once if something failed. */
15454 sym
->attr
.is_bind_c
= 0;
15459 /* If a derived type symbol has reached this point, without its
15460 type being declared, we have an error. Notice that most
15461 conditions that produce undefined derived types have already
15462 been dealt with. However, the likes of:
15463 implicit type(t) (t) ..... call foo (t) will get us here if
15464 the type is not declared in the scope of the implicit
15465 statement. Change the type to BT_UNKNOWN, both because it is so
15466 and to prevent an ICE. */
15467 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15468 && sym
->ts
.u
.derived
->components
== NULL
15469 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15471 gfc_error ("The derived type %qs at %L is of type %qs, "
15472 "which has not been defined", sym
->name
,
15473 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15474 sym
->ts
.type
= BT_UNKNOWN
;
15478 /* Make sure that the derived type has been resolved and that the
15479 derived type is visible in the symbol's namespace, if it is a
15480 module function and is not PRIVATE. */
15481 if (sym
->ts
.type
== BT_DERIVED
15482 && sym
->ts
.u
.derived
->attr
.use_assoc
15483 && sym
->ns
->proc_name
15484 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15485 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15488 /* Unless the derived-type declaration is use associated, Fortran 95
15489 does not allow public entries of private derived types.
15490 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15491 161 in 95-006r3. */
15492 if (sym
->ts
.type
== BT_DERIVED
15493 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15494 && !sym
->ts
.u
.derived
->attr
.use_assoc
15495 && gfc_check_symbol_access (sym
)
15496 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15497 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15498 "derived type %qs",
15499 (sym
->attr
.flavor
== FL_PARAMETER
)
15500 ? "parameter" : "variable",
15501 sym
->name
, &sym
->declared_at
,
15502 sym
->ts
.u
.derived
->name
))
15505 /* F2008, C1302. */
15506 if (sym
->ts
.type
== BT_DERIVED
15507 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15508 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15509 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15510 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15512 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15513 "type LOCK_TYPE must be a coarray", sym
->name
,
15514 &sym
->declared_at
);
15518 /* TS18508, C702/C703. */
15519 if (sym
->ts
.type
== BT_DERIVED
15520 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15521 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15522 || sym
->ts
.u
.derived
->attr
.event_comp
)
15523 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15525 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15526 "type EVENT_TYPE must be a coarray", sym
->name
,
15527 &sym
->declared_at
);
15531 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15532 default initialization is defined (5.1.2.4.4). */
15533 if (sym
->ts
.type
== BT_DERIVED
15535 && sym
->attr
.intent
== INTENT_OUT
15537 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15539 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15541 if (c
->initializer
)
15543 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15544 "ASSUMED SIZE and so cannot have a default initializer",
15545 sym
->name
, &sym
->declared_at
);
15552 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15553 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15555 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15556 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15561 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15562 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15564 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15565 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15570 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15571 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15572 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15573 || class_attr
.codimension
)
15574 && (sym
->attr
.result
|| sym
->result
== sym
))
15576 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15577 "a coarray component", sym
->name
, &sym
->declared_at
);
15582 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15583 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15585 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15586 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15591 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15592 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15593 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15594 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15595 || class_attr
.allocatable
))
15597 gfc_error ("Variable %qs at %L with coarray component shall be a "
15598 "nonpointer, nonallocatable scalar, which is not a coarray",
15599 sym
->name
, &sym
->declared_at
);
15603 /* F2008, C526. The function-result case was handled above. */
15604 if (class_attr
.codimension
15605 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15606 || sym
->attr
.select_type_temporary
15607 || sym
->attr
.associate_var
15608 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15609 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15610 || sym
->ns
->proc_name
->attr
.is_main_program
15611 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15613 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15614 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15618 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15619 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15621 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15622 "deferred shape", sym
->name
, &sym
->declared_at
);
15625 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15626 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15628 gfc_error ("Allocatable coarray variable %qs at %L must have "
15629 "deferred shape", sym
->name
, &sym
->declared_at
);
15634 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15635 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15636 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15637 || (class_attr
.codimension
&& class_attr
.allocatable
))
15638 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15640 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15641 "allocatable coarray or have coarray components",
15642 sym
->name
, &sym
->declared_at
);
15646 if (class_attr
.codimension
&& sym
->attr
.dummy
15647 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15649 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15650 "procedure %qs", sym
->name
, &sym
->declared_at
,
15651 sym
->ns
->proc_name
->name
);
15655 if (sym
->ts
.type
== BT_LOGICAL
15656 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15657 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15658 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15661 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15662 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15664 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15665 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15666 "%L with non-C_Bool kind in BIND(C) procedure "
15667 "%qs", sym
->name
, &sym
->declared_at
,
15668 sym
->ns
->proc_name
->name
))
15670 else if (!gfc_logical_kinds
[i
].c_bool
15671 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15672 "%qs at %L with non-C_Bool kind in "
15673 "BIND(C) procedure %qs", sym
->name
,
15675 sym
->attr
.function
? sym
->name
15676 : sym
->ns
->proc_name
->name
))
15680 switch (sym
->attr
.flavor
)
15683 if (!resolve_fl_variable (sym
, mp_flag
))
15688 if (sym
->formal
&& !sym
->formal_ns
)
15690 /* Check that none of the arguments are a namelist. */
15691 gfc_formal_arglist
*formal
= sym
->formal
;
15693 for (; formal
; formal
= formal
->next
)
15694 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15696 gfc_error ("Namelist %qs cannot be an argument to "
15697 "subroutine or function at %L",
15698 formal
->sym
->name
, &sym
->declared_at
);
15703 if (!resolve_fl_procedure (sym
, mp_flag
))
15708 if (!resolve_fl_namelist (sym
))
15713 if (!resolve_fl_parameter (sym
))
15721 /* Resolve array specifier. Check as well some constraints
15722 on COMMON blocks. */
15724 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15726 /* Set the formal_arg_flag so that check_conflict will not throw
15727 an error for host associated variables in the specification
15728 expression for an array_valued function. */
15729 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15730 formal_arg_flag
= true;
15732 saved_specification_expr
= specification_expr
;
15733 specification_expr
= true;
15734 gfc_resolve_array_spec (sym
->as
, check_constant
);
15735 specification_expr
= saved_specification_expr
;
15737 formal_arg_flag
= false;
15739 /* Resolve formal namespaces. */
15740 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15741 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15742 gfc_resolve (sym
->formal_ns
);
15744 /* Make sure the formal namespace is present. */
15745 if (sym
->formal
&& !sym
->formal_ns
)
15747 gfc_formal_arglist
*formal
= sym
->formal
;
15748 while (formal
&& !formal
->sym
)
15749 formal
= formal
->next
;
15753 sym
->formal_ns
= formal
->sym
->ns
;
15754 if (sym
->ns
!= formal
->sym
->ns
)
15755 sym
->formal_ns
->refs
++;
15759 /* Check threadprivate restrictions. */
15760 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15761 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15762 && (!sym
->attr
.in_common
15763 && sym
->module
== NULL
15764 && (sym
->ns
->proc_name
== NULL
15765 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15766 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15768 /* Check omp declare target restrictions. */
15769 if (sym
->attr
.omp_declare_target
15770 && sym
->attr
.flavor
== FL_VARIABLE
15772 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15773 && (!sym
->attr
.in_common
15774 && sym
->module
== NULL
15775 && (sym
->ns
->proc_name
== NULL
15776 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15777 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15778 sym
->name
, &sym
->declared_at
);
15780 /* If we have come this far we can apply default-initializers, as
15781 described in 14.7.5, to those variables that have not already
15782 been assigned one. */
15783 if (sym
->ts
.type
== BT_DERIVED
15785 && !sym
->attr
.allocatable
15786 && !sym
->attr
.alloc_comp
)
15788 symbol_attribute
*a
= &sym
->attr
;
15790 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15791 && !a
->in_common
&& !a
->use_assoc
15793 && !((a
->function
|| a
->result
)
15795 || sym
->ts
.u
.derived
->attr
.alloc_comp
15796 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15797 && !(a
->function
&& sym
!= sym
->result
))
15798 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15799 apply_default_init (sym
);
15800 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15801 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15802 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15803 /* Mark the result symbol to be referenced, when it has allocatable
15805 sym
->result
->attr
.referenced
= 1;
15808 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15809 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15810 && !CLASS_DATA (sym
)->attr
.class_pointer
15811 && !CLASS_DATA (sym
)->attr
.allocatable
)
15812 apply_default_init (sym
);
15814 /* If this symbol has a type-spec, check it. */
15815 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15816 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15817 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15820 if (sym
->param_list
)
15825 /************* Resolve DATA statements *************/
15829 gfc_data_value
*vnode
;
15835 /* Advance the values structure to point to the next value in the data list. */
15838 next_data_value (void)
15840 while (mpz_cmp_ui (values
.left
, 0) == 0)
15843 if (values
.vnode
->next
== NULL
)
15846 values
.vnode
= values
.vnode
->next
;
15847 mpz_set (values
.left
, values
.vnode
->repeat
);
15855 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15861 ar_type mark
= AR_UNKNOWN
;
15863 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15869 if (!gfc_resolve_expr (var
->expr
))
15873 mpz_init_set_si (offset
, 0);
15876 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15877 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15878 e
= e
->value
.function
.actual
->expr
;
15880 if (e
->expr_type
!= EXPR_VARIABLE
)
15882 gfc_error ("Expecting definable entity near %L", where
);
15886 sym
= e
->symtree
->n
.sym
;
15888 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15890 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15891 sym
->name
, &sym
->declared_at
);
15895 if (e
->ref
== NULL
&& sym
->as
)
15897 gfc_error ("DATA array %qs at %L must be specified in a previous"
15898 " declaration", sym
->name
, where
);
15902 if (gfc_is_coindexed (e
))
15904 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15909 has_pointer
= sym
->attr
.pointer
;
15911 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15913 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15918 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
15920 gfc_error ("DATA element %qs at %L is a pointer and so must "
15921 "be a full array", sym
->name
, where
);
15925 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
15927 gfc_error ("DATA object near %L has the pointer attribute "
15928 "and the corresponding DATA value is not a valid "
15929 "initial-data-target", where
);
15935 if (e
->rank
== 0 || has_pointer
)
15937 mpz_init_set_ui (size
, 1);
15944 /* Find the array section reference. */
15945 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15947 if (ref
->type
!= REF_ARRAY
)
15949 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15955 /* Set marks according to the reference pattern. */
15956 switch (ref
->u
.ar
.type
)
15964 /* Get the start position of array section. */
15965 gfc_get_section_index (ar
, section_index
, &offset
);
15970 gcc_unreachable ();
15973 if (!gfc_array_size (e
, &size
))
15975 gfc_error ("Nonconstant array section at %L in DATA statement",
15977 mpz_clear (offset
);
15984 while (mpz_cmp_ui (size
, 0) > 0)
15986 if (!next_data_value ())
15988 gfc_error ("DATA statement at %L has more variables than values",
15994 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15998 /* If we have more than one element left in the repeat count,
15999 and we have more than one element left in the target variable,
16000 then create a range assignment. */
16001 /* FIXME: Only done for full arrays for now, since array sections
16003 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16004 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16008 if (mpz_cmp (size
, values
.left
) >= 0)
16010 mpz_init_set (range
, values
.left
);
16011 mpz_sub (size
, size
, values
.left
);
16012 mpz_set_ui (values
.left
, 0);
16016 mpz_init_set (range
, size
);
16017 mpz_sub (values
.left
, values
.left
, size
);
16018 mpz_set_ui (size
, 0);
16021 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16024 mpz_add (offset
, offset
, range
);
16031 /* Assign initial value to symbol. */
16034 mpz_sub_ui (values
.left
, values
.left
, 1);
16035 mpz_sub_ui (size
, size
, 1);
16037 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16042 if (mark
== AR_FULL
)
16043 mpz_add_ui (offset
, offset
, 1);
16045 /* Modify the array section indexes and recalculate the offset
16046 for next element. */
16047 else if (mark
== AR_SECTION
)
16048 gfc_advance_section (section_index
, ar
, &offset
);
16052 if (mark
== AR_SECTION
)
16054 for (i
= 0; i
< ar
->dimen
; i
++)
16055 mpz_clear (section_index
[i
]);
16059 mpz_clear (offset
);
16065 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16067 /* Iterate over a list of elements in a DATA statement. */
16070 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16073 iterator_stack frame
;
16074 gfc_expr
*e
, *start
, *end
, *step
;
16075 bool retval
= true;
16077 mpz_init (frame
.value
);
16080 start
= gfc_copy_expr (var
->iter
.start
);
16081 end
= gfc_copy_expr (var
->iter
.end
);
16082 step
= gfc_copy_expr (var
->iter
.step
);
16084 if (!gfc_simplify_expr (start
, 1)
16085 || start
->expr_type
!= EXPR_CONSTANT
)
16087 gfc_error ("start of implied-do loop at %L could not be "
16088 "simplified to a constant value", &start
->where
);
16092 if (!gfc_simplify_expr (end
, 1)
16093 || end
->expr_type
!= EXPR_CONSTANT
)
16095 gfc_error ("end of implied-do loop at %L could not be "
16096 "simplified to a constant value", &start
->where
);
16100 if (!gfc_simplify_expr (step
, 1)
16101 || step
->expr_type
!= EXPR_CONSTANT
)
16103 gfc_error ("step of implied-do loop at %L could not be "
16104 "simplified to a constant value", &start
->where
);
16109 mpz_set (trip
, end
->value
.integer
);
16110 mpz_sub (trip
, trip
, start
->value
.integer
);
16111 mpz_add (trip
, trip
, step
->value
.integer
);
16113 mpz_div (trip
, trip
, step
->value
.integer
);
16115 mpz_set (frame
.value
, start
->value
.integer
);
16117 frame
.prev
= iter_stack
;
16118 frame
.variable
= var
->iter
.var
->symtree
;
16119 iter_stack
= &frame
;
16121 while (mpz_cmp_ui (trip
, 0) > 0)
16123 if (!traverse_data_var (var
->list
, where
))
16129 e
= gfc_copy_expr (var
->expr
);
16130 if (!gfc_simplify_expr (e
, 1))
16137 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16139 mpz_sub_ui (trip
, trip
, 1);
16143 mpz_clear (frame
.value
);
16146 gfc_free_expr (start
);
16147 gfc_free_expr (end
);
16148 gfc_free_expr (step
);
16150 iter_stack
= frame
.prev
;
16155 /* Type resolve variables in the variable list of a DATA statement. */
16158 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16162 for (; var
; var
= var
->next
)
16164 if (var
->expr
== NULL
)
16165 t
= traverse_data_list (var
, where
);
16167 t
= check_data_variable (var
, where
);
16177 /* Resolve the expressions and iterators associated with a data statement.
16178 This is separate from the assignment checking because data lists should
16179 only be resolved once. */
16182 resolve_data_variables (gfc_data_variable
*d
)
16184 for (; d
; d
= d
->next
)
16186 if (d
->list
== NULL
)
16188 if (!gfc_resolve_expr (d
->expr
))
16193 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16196 if (!resolve_data_variables (d
->list
))
16205 /* Resolve a single DATA statement. We implement this by storing a pointer to
16206 the value list into static variables, and then recursively traversing the
16207 variables list, expanding iterators and such. */
16210 resolve_data (gfc_data
*d
)
16213 if (!resolve_data_variables (d
->var
))
16216 values
.vnode
= d
->value
;
16217 if (d
->value
== NULL
)
16218 mpz_set_ui (values
.left
, 0);
16220 mpz_set (values
.left
, d
->value
->repeat
);
16222 if (!traverse_data_var (d
->var
, &d
->where
))
16225 /* At this point, we better not have any values left. */
16227 if (next_data_value ())
16228 gfc_error ("DATA statement at %L has more values than variables",
16233 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16234 accessed by host or use association, is a dummy argument to a pure function,
16235 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16236 is storage associated with any such variable, shall not be used in the
16237 following contexts: (clients of this function). */
16239 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16240 procedure. Returns zero if assignment is OK, nonzero if there is a
16243 gfc_impure_variable (gfc_symbol
*sym
)
16248 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16251 /* Check if the symbol's ns is inside the pure procedure. */
16252 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16256 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16260 proc
= sym
->ns
->proc_name
;
16261 if (sym
->attr
.dummy
16262 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16263 || proc
->attr
.function
))
16266 /* TODO: Sort out what can be storage associated, if anything, and include
16267 it here. In principle equivalences should be scanned but it does not
16268 seem to be possible to storage associate an impure variable this way. */
16273 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16274 current namespace is inside a pure procedure. */
16277 gfc_pure (gfc_symbol
*sym
)
16279 symbol_attribute attr
;
16284 /* Check if the current namespace or one of its parents
16285 belongs to a pure procedure. */
16286 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16288 sym
= ns
->proc_name
;
16292 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16300 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16304 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16305 checks if the current namespace is implicitly pure. Note that this
16306 function returns false for a PURE procedure. */
16309 gfc_implicit_pure (gfc_symbol
*sym
)
16315 /* Check if the current procedure is implicit_pure. Walk up
16316 the procedure list until we find a procedure. */
16317 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16319 sym
= ns
->proc_name
;
16323 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16328 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16329 && !sym
->attr
.pure
;
16334 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16340 /* Check if the current procedure is implicit_pure. Walk up
16341 the procedure list until we find a procedure. */
16342 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16344 sym
= ns
->proc_name
;
16348 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16353 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16354 sym
->attr
.implicit_pure
= 0;
16356 sym
->attr
.pure
= 0;
16360 /* Test whether the current procedure is elemental or not. */
16363 gfc_elemental (gfc_symbol
*sym
)
16365 symbol_attribute attr
;
16368 sym
= gfc_current_ns
->proc_name
;
16373 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16377 /* Warn about unused labels. */
16380 warn_unused_fortran_label (gfc_st_label
*label
)
16385 warn_unused_fortran_label (label
->left
);
16387 if (label
->defined
== ST_LABEL_UNKNOWN
)
16390 switch (label
->referenced
)
16392 case ST_LABEL_UNKNOWN
:
16393 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16394 label
->value
, &label
->where
);
16397 case ST_LABEL_BAD_TARGET
:
16398 gfc_warning (OPT_Wunused_label
,
16399 "Label %d at %L defined but cannot be used",
16400 label
->value
, &label
->where
);
16407 warn_unused_fortran_label (label
->right
);
16411 /* Returns the sequence type of a symbol or sequence. */
16414 sequence_type (gfc_typespec ts
)
16423 if (ts
.u
.derived
->components
== NULL
)
16424 return SEQ_NONDEFAULT
;
16426 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16427 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16428 if (sequence_type (c
->ts
) != result
)
16434 if (ts
.kind
!= gfc_default_character_kind
)
16435 return SEQ_NONDEFAULT
;
16437 return SEQ_CHARACTER
;
16440 if (ts
.kind
!= gfc_default_integer_kind
)
16441 return SEQ_NONDEFAULT
;
16443 return SEQ_NUMERIC
;
16446 if (!(ts
.kind
== gfc_default_real_kind
16447 || ts
.kind
== gfc_default_double_kind
))
16448 return SEQ_NONDEFAULT
;
16450 return SEQ_NUMERIC
;
16453 if (ts
.kind
!= gfc_default_complex_kind
)
16454 return SEQ_NONDEFAULT
;
16456 return SEQ_NUMERIC
;
16459 if (ts
.kind
!= gfc_default_logical_kind
)
16460 return SEQ_NONDEFAULT
;
16462 return SEQ_NUMERIC
;
16465 return SEQ_NONDEFAULT
;
16470 /* Resolve derived type EQUIVALENCE object. */
16473 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16475 gfc_component
*c
= derived
->components
;
16480 /* Shall not be an object of nonsequence derived type. */
16481 if (!derived
->attr
.sequence
)
16483 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16484 "attribute to be an EQUIVALENCE object", sym
->name
,
16489 /* Shall not have allocatable components. */
16490 if (derived
->attr
.alloc_comp
)
16492 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16493 "components to be an EQUIVALENCE object",sym
->name
,
16498 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16500 gfc_error ("Derived type variable %qs at %L with default "
16501 "initialization cannot be in EQUIVALENCE with a variable "
16502 "in COMMON", sym
->name
, &e
->where
);
16506 for (; c
; c
= c
->next
)
16508 if (gfc_bt_struct (c
->ts
.type
)
16509 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16512 /* Shall not be an object of sequence derived type containing a pointer
16513 in the structure. */
16514 if (c
->attr
.pointer
)
16516 gfc_error ("Derived type variable %qs at %L with pointer "
16517 "component(s) cannot be an EQUIVALENCE object",
16518 sym
->name
, &e
->where
);
16526 /* Resolve equivalence object.
16527 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16528 an allocatable array, an object of nonsequence derived type, an object of
16529 sequence derived type containing a pointer at any level of component
16530 selection, an automatic object, a function name, an entry name, a result
16531 name, a named constant, a structure component, or a subobject of any of
16532 the preceding objects. A substring shall not have length zero. A
16533 derived type shall not have components with default initialization nor
16534 shall two objects of an equivalence group be initialized.
16535 Either all or none of the objects shall have an protected attribute.
16536 The simple constraints are done in symbol.c(check_conflict) and the rest
16537 are implemented here. */
16540 resolve_equivalence (gfc_equiv
*eq
)
16543 gfc_symbol
*first_sym
;
16546 locus
*last_where
= NULL
;
16547 seq_type eq_type
, last_eq_type
;
16548 gfc_typespec
*last_ts
;
16549 int object
, cnt_protected
;
16552 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16554 first_sym
= eq
->expr
->symtree
->n
.sym
;
16558 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16562 e
->ts
= e
->symtree
->n
.sym
->ts
;
16563 /* match_varspec might not know yet if it is seeing
16564 array reference or substring reference, as it doesn't
16566 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16568 gfc_ref
*ref
= e
->ref
;
16569 sym
= e
->symtree
->n
.sym
;
16571 if (sym
->attr
.dimension
)
16573 ref
->u
.ar
.as
= sym
->as
;
16577 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16578 if (e
->ts
.type
== BT_CHARACTER
16580 && ref
->type
== REF_ARRAY
16581 && ref
->u
.ar
.dimen
== 1
16582 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16583 && ref
->u
.ar
.stride
[0] == NULL
)
16585 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16586 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16589 /* Optimize away the (:) reference. */
16590 if (start
== NULL
&& end
== NULL
)
16593 e
->ref
= ref
->next
;
16595 e
->ref
->next
= ref
->next
;
16600 ref
->type
= REF_SUBSTRING
;
16602 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16604 ref
->u
.ss
.start
= start
;
16605 if (end
== NULL
&& e
->ts
.u
.cl
)
16606 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16607 ref
->u
.ss
.end
= end
;
16608 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16615 /* Any further ref is an error. */
16618 gcc_assert (ref
->type
== REF_ARRAY
);
16619 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16625 if (!gfc_resolve_expr (e
))
16628 sym
= e
->symtree
->n
.sym
;
16630 if (sym
->attr
.is_protected
)
16632 if (cnt_protected
> 0 && cnt_protected
!= object
)
16634 gfc_error ("Either all or none of the objects in the "
16635 "EQUIVALENCE set at %L shall have the "
16636 "PROTECTED attribute",
16641 /* Shall not equivalence common block variables in a PURE procedure. */
16642 if (sym
->ns
->proc_name
16643 && sym
->ns
->proc_name
->attr
.pure
16644 && sym
->attr
.in_common
)
16646 /* Need to check for symbols that may have entered the pure
16647 procedure via a USE statement. */
16648 bool saw_sym
= false;
16649 if (sym
->ns
->use_stmts
)
16652 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16653 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16659 gfc_error ("COMMON block member %qs at %L cannot be an "
16660 "EQUIVALENCE object in the pure procedure %qs",
16661 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16665 /* Shall not be a named constant. */
16666 if (e
->expr_type
== EXPR_CONSTANT
)
16668 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16669 "object", sym
->name
, &e
->where
);
16673 if (e
->ts
.type
== BT_DERIVED
16674 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16677 /* Check that the types correspond correctly:
16679 A numeric sequence structure may be equivalenced to another sequence
16680 structure, an object of default integer type, default real type, double
16681 precision real type, default logical type such that components of the
16682 structure ultimately only become associated to objects of the same
16683 kind. A character sequence structure may be equivalenced to an object
16684 of default character kind or another character sequence structure.
16685 Other objects may be equivalenced only to objects of the same type and
16686 kind parameters. */
16688 /* Identical types are unconditionally OK. */
16689 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16690 goto identical_types
;
16692 last_eq_type
= sequence_type (*last_ts
);
16693 eq_type
= sequence_type (sym
->ts
);
16695 /* Since the pair of objects is not of the same type, mixed or
16696 non-default sequences can be rejected. */
16698 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16699 "statement at %L with different type objects";
16701 && last_eq_type
== SEQ_MIXED
16702 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16703 || (eq_type
== SEQ_MIXED
16704 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16707 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16708 "statement at %L with objects of different type";
16710 && last_eq_type
== SEQ_NONDEFAULT
16711 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16712 || (eq_type
== SEQ_NONDEFAULT
16713 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16716 msg
="Non-CHARACTER object %qs in default CHARACTER "
16717 "EQUIVALENCE statement at %L";
16718 if (last_eq_type
== SEQ_CHARACTER
16719 && eq_type
!= SEQ_CHARACTER
16720 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16723 msg
="Non-NUMERIC object %qs in default NUMERIC "
16724 "EQUIVALENCE statement at %L";
16725 if (last_eq_type
== SEQ_NUMERIC
16726 && eq_type
!= SEQ_NUMERIC
16727 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16732 last_where
= &e
->where
;
16737 /* Shall not be an automatic array. */
16738 if (e
->ref
->type
== REF_ARRAY
16739 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16741 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16742 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16749 /* Shall not be a structure component. */
16750 if (r
->type
== REF_COMPONENT
)
16752 gfc_error ("Structure component %qs at %L cannot be an "
16753 "EQUIVALENCE object",
16754 r
->u
.c
.component
->name
, &e
->where
);
16758 /* A substring shall not have length zero. */
16759 if (r
->type
== REF_SUBSTRING
)
16761 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16763 gfc_error ("Substring at %L has length zero",
16764 &r
->u
.ss
.start
->where
);
16774 /* Function called by resolve_fntype to flag other symbol used in the
16775 length type parameter specification of function resuls. */
16778 flag_fn_result_spec (gfc_expr
*expr
,
16780 int *f ATTRIBUTE_UNUSED
)
16785 if (expr
->expr_type
== EXPR_VARIABLE
)
16787 s
= expr
->symtree
->n
.sym
;
16788 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16794 gfc_error ("Self reference in character length expression "
16795 "for %qs at %L", sym
->name
, &expr
->where
);
16799 if (!s
->fn_result_spec
16800 && s
->attr
.flavor
== FL_PARAMETER
)
16802 /* Function contained in a module.... */
16803 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16806 s
->fn_result_spec
= 1;
16807 /* Make sure that this symbol is translated as a module
16809 st
= gfc_get_unique_symtree (ns
);
16813 /* ... which is use associated and called. */
16814 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16816 /* External function matched with an interface. */
16819 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16820 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16821 && s
->ns
->proc_name
->attr
.function
))
16822 s
->fn_result_spec
= 1;
16829 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16832 resolve_fntype (gfc_namespace
*ns
)
16834 gfc_entry_list
*el
;
16837 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16840 /* If there are any entries, ns->proc_name is the entry master
16841 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16843 sym
= ns
->entries
->sym
;
16845 sym
= ns
->proc_name
;
16846 if (sym
->result
== sym
16847 && sym
->ts
.type
== BT_UNKNOWN
16848 && !gfc_set_default_type (sym
, 0, NULL
)
16849 && !sym
->attr
.untyped
)
16851 gfc_error ("Function %qs at %L has no IMPLICIT type",
16852 sym
->name
, &sym
->declared_at
);
16853 sym
->attr
.untyped
= 1;
16856 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16857 && !sym
->attr
.contained
16858 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16859 && gfc_check_symbol_access (sym
))
16861 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16862 "%L of PRIVATE type %qs", sym
->name
,
16863 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16867 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16869 if (el
->sym
->result
== el
->sym
16870 && el
->sym
->ts
.type
== BT_UNKNOWN
16871 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16872 && !el
->sym
->attr
.untyped
)
16874 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16875 el
->sym
->name
, &el
->sym
->declared_at
);
16876 el
->sym
->attr
.untyped
= 1;
16880 if (sym
->ts
.type
== BT_CHARACTER
)
16881 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16885 /* 12.3.2.1.1 Defined operators. */
16888 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16890 gfc_formal_arglist
*formal
;
16892 if (!sym
->attr
.function
)
16894 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16895 sym
->name
, &where
);
16899 if (sym
->ts
.type
== BT_CHARACTER
16900 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16901 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16902 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16904 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16905 "character length", sym
->name
, &where
);
16909 formal
= gfc_sym_get_dummy_args (sym
);
16910 if (!formal
|| !formal
->sym
)
16912 gfc_error ("User operator procedure %qs at %L must have at least "
16913 "one argument", sym
->name
, &where
);
16917 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16919 gfc_error ("First argument of operator interface at %L must be "
16920 "INTENT(IN)", &where
);
16924 if (formal
->sym
->attr
.optional
)
16926 gfc_error ("First argument of operator interface at %L cannot be "
16927 "optional", &where
);
16931 formal
= formal
->next
;
16932 if (!formal
|| !formal
->sym
)
16935 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16937 gfc_error ("Second argument of operator interface at %L must be "
16938 "INTENT(IN)", &where
);
16942 if (formal
->sym
->attr
.optional
)
16944 gfc_error ("Second argument of operator interface at %L cannot be "
16945 "optional", &where
);
16951 gfc_error ("Operator interface at %L must have, at most, two "
16952 "arguments", &where
);
16960 gfc_resolve_uops (gfc_symtree
*symtree
)
16962 gfc_interface
*itr
;
16964 if (symtree
== NULL
)
16967 gfc_resolve_uops (symtree
->left
);
16968 gfc_resolve_uops (symtree
->right
);
16970 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16971 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16975 /* Examine all of the expressions associated with a program unit,
16976 assign types to all intermediate expressions, make sure that all
16977 assignments are to compatible types and figure out which names
16978 refer to which functions or subroutines. It doesn't check code
16979 block, which is handled by gfc_resolve_code. */
16982 resolve_types (gfc_namespace
*ns
)
16988 gfc_namespace
* old_ns
= gfc_current_ns
;
16990 if (ns
->types_resolved
)
16993 /* Check that all IMPLICIT types are ok. */
16994 if (!ns
->seen_implicit_none
)
16997 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16998 if (ns
->set_flag
[letter
]
16999 && !resolve_typespec_used (&ns
->default_type
[letter
],
17000 &ns
->implicit_loc
[letter
], NULL
))
17004 gfc_current_ns
= ns
;
17006 resolve_entries (ns
);
17008 resolve_common_vars (&ns
->blank_common
, false);
17009 resolve_common_blocks (ns
->common_root
);
17011 resolve_contained_functions (ns
);
17013 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17014 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17015 resolve_formal_arglist (ns
->proc_name
);
17017 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17019 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17020 resolve_charlen (cl
);
17022 gfc_traverse_ns (ns
, resolve_symbol
);
17024 resolve_fntype (ns
);
17026 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17028 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17029 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17030 "also be PURE", n
->proc_name
->name
,
17031 &n
->proc_name
->declared_at
);
17037 gfc_do_concurrent_flag
= 0;
17038 gfc_check_interfaces (ns
);
17040 gfc_traverse_ns (ns
, resolve_values
);
17042 if (ns
->save_all
|| !flag_automatic
)
17046 for (d
= ns
->data
; d
; d
= d
->next
)
17050 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17052 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17054 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17055 resolve_equivalence (eq
);
17057 /* Warn about unused labels. */
17058 if (warn_unused_label
)
17059 warn_unused_fortran_label (ns
->st_labels
);
17061 gfc_resolve_uops (ns
->uop_root
);
17063 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17065 gfc_resolve_omp_declare_simd (ns
);
17067 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17069 ns
->types_resolved
= 1;
17071 gfc_current_ns
= old_ns
;
17075 /* Call gfc_resolve_code recursively. */
17078 resolve_codes (gfc_namespace
*ns
)
17081 bitmap_obstack old_obstack
;
17083 if (ns
->resolved
== 1)
17086 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17089 gfc_current_ns
= ns
;
17091 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17092 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17095 /* Set to an out of range value. */
17096 current_entry_id
= -1;
17098 old_obstack
= labels_obstack
;
17099 bitmap_obstack_initialize (&labels_obstack
);
17101 gfc_resolve_oacc_declare (ns
);
17102 gfc_resolve_oacc_routines (ns
);
17103 gfc_resolve_omp_local_vars (ns
);
17104 gfc_resolve_code (ns
->code
, ns
);
17106 bitmap_obstack_release (&labels_obstack
);
17107 labels_obstack
= old_obstack
;
17111 /* This function is called after a complete program unit has been compiled.
17112 Its purpose is to examine all of the expressions associated with a program
17113 unit, assign types to all intermediate expressions, make sure that all
17114 assignments are to compatible types and figure out which names refer to
17115 which functions or subroutines. */
17118 gfc_resolve (gfc_namespace
*ns
)
17120 gfc_namespace
*old_ns
;
17121 code_stack
*old_cs_base
;
17122 struct gfc_omp_saved_state old_omp_state
;
17128 old_ns
= gfc_current_ns
;
17129 old_cs_base
= cs_base
;
17131 /* As gfc_resolve can be called during resolution of an OpenMP construct
17132 body, we should clear any state associated to it, so that say NS's
17133 DO loops are not interpreted as OpenMP loops. */
17134 if (!ns
->construct_entities
)
17135 gfc_omp_save_and_clear_state (&old_omp_state
);
17137 resolve_types (ns
);
17138 component_assignment_level
= 0;
17139 resolve_codes (ns
);
17141 gfc_current_ns
= old_ns
;
17142 cs_base
= old_cs_base
;
17145 gfc_run_passes (ns
);
17147 if (!ns
->construct_entities
)
17148 gfc_omp_restore_state (&old_omp_state
);