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 temp
= need_full_assumed_size
;
3246 need_full_assumed_size
= 0;
3248 if (!resolve_elemental_actual (expr
, NULL
))
3251 if (omp_workshare_flag
3252 && expr
->value
.function
.esym
3253 && ! gfc_elemental (expr
->value
.function
.esym
))
3255 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3256 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3261 #define GENERIC_ID expr->value.function.isym->id
3262 else if (expr
->value
.function
.actual
!= NULL
3263 && expr
->value
.function
.isym
!= NULL
3264 && GENERIC_ID
!= GFC_ISYM_LBOUND
3265 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3266 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3267 && GENERIC_ID
!= GFC_ISYM_LEN
3268 && GENERIC_ID
!= GFC_ISYM_LOC
3269 && GENERIC_ID
!= GFC_ISYM_C_LOC
3270 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3272 /* Array intrinsics must also have the last upper bound of an
3273 assumed size array argument. UBOUND and SIZE have to be
3274 excluded from the check if the second argument is anything
3277 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3279 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3280 && arg
== expr
->value
.function
.actual
3281 && arg
->next
!= NULL
&& arg
->next
->expr
)
3283 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3286 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3289 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3294 if (arg
->expr
!= NULL
3295 && arg
->expr
->rank
> 0
3296 && resolve_assumed_size_actual (arg
->expr
))
3302 need_full_assumed_size
= temp
;
3304 if (!check_pure_function(expr
))
3307 /* Functions without the RECURSIVE attribution are not allowed to
3308 * call themselves. */
3309 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3312 esym
= expr
->value
.function
.esym
;
3314 if (is_illegal_recursion (esym
, gfc_current_ns
))
3316 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3317 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3318 " function %qs is not RECURSIVE",
3319 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3321 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3322 " is not RECURSIVE", esym
->name
, &expr
->where
);
3328 /* Character lengths of use associated functions may contains references to
3329 symbols not referenced from the current program unit otherwise. Make sure
3330 those symbols are marked as referenced. */
3332 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3333 && expr
->value
.function
.esym
->attr
.use_assoc
)
3335 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3338 /* Make sure that the expression has a typespec that works. */
3339 if (expr
->ts
.type
== BT_UNKNOWN
)
3341 if (expr
->symtree
->n
.sym
->result
3342 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3343 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3344 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3347 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3349 if (expr
->value
.function
.esym
)
3350 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3352 update_current_proc_array_outer_dependency (sym
);
3355 /* typebound procedure: Assume the worst. */
3356 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3362 /************* Subroutine resolution *************/
3365 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3372 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3376 else if (gfc_do_concurrent_flag
)
3378 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3382 else if (gfc_pure (NULL
))
3384 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3388 gfc_unset_implicit_pure (NULL
);
3394 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3398 if (sym
->attr
.generic
)
3400 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3403 c
->resolved_sym
= s
;
3404 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3409 /* TODO: Need to search for elemental references in generic interface. */
3412 if (sym
->attr
.intrinsic
)
3413 return gfc_intrinsic_sub_interface (c
, 0);
3420 resolve_generic_s (gfc_code
*c
)
3425 sym
= c
->symtree
->n
.sym
;
3429 m
= resolve_generic_s0 (c
, sym
);
3432 else if (m
== MATCH_ERROR
)
3436 if (sym
->ns
->parent
== NULL
)
3438 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3442 if (!generic_sym (sym
))
3446 /* Last ditch attempt. See if the reference is to an intrinsic
3447 that possesses a matching interface. 14.1.2.4 */
3448 sym
= c
->symtree
->n
.sym
;
3450 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3452 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3453 sym
->name
, &c
->loc
);
3457 m
= gfc_intrinsic_sub_interface (c
, 0);
3461 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3462 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3468 /* Resolve a subroutine call known to be specific. */
3471 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3475 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3477 if (sym
->attr
.dummy
)
3479 sym
->attr
.proc
= PROC_DUMMY
;
3483 sym
->attr
.proc
= PROC_EXTERNAL
;
3487 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3490 if (sym
->attr
.intrinsic
)
3492 m
= gfc_intrinsic_sub_interface (c
, 1);
3496 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3497 "with an intrinsic", sym
->name
, &c
->loc
);
3505 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3507 c
->resolved_sym
= sym
;
3508 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3516 resolve_specific_s (gfc_code
*c
)
3521 sym
= c
->symtree
->n
.sym
;
3525 m
= resolve_specific_s0 (c
, sym
);
3528 if (m
== MATCH_ERROR
)
3531 if (sym
->ns
->parent
== NULL
)
3534 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3540 sym
= c
->symtree
->n
.sym
;
3541 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3542 sym
->name
, &c
->loc
);
3548 /* Resolve a subroutine call not known to be generic nor specific. */
3551 resolve_unknown_s (gfc_code
*c
)
3555 sym
= c
->symtree
->n
.sym
;
3557 if (sym
->attr
.dummy
)
3559 sym
->attr
.proc
= PROC_DUMMY
;
3563 /* See if we have an intrinsic function reference. */
3565 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3567 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3572 /* The reference is to an external name. */
3575 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3577 c
->resolved_sym
= sym
;
3579 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3583 /* Resolve a subroutine call. Although it was tempting to use the same code
3584 for functions, subroutines and functions are stored differently and this
3585 makes things awkward. */
3588 resolve_call (gfc_code
*c
)
3591 procedure_type ptype
= PROC_INTRINSIC
;
3592 gfc_symbol
*csym
, *sym
;
3593 bool no_formal_args
;
3595 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3597 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3599 gfc_error ("%qs at %L has a type, which is not consistent with "
3600 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3604 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3607 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3608 sym
= st
? st
->n
.sym
: NULL
;
3609 if (sym
&& csym
!= sym
3610 && sym
->ns
== gfc_current_ns
3611 && sym
->attr
.flavor
== FL_PROCEDURE
3612 && sym
->attr
.contained
)
3615 if (csym
->attr
.generic
)
3616 c
->symtree
->n
.sym
= sym
;
3619 csym
= c
->symtree
->n
.sym
;
3623 /* If this ia a deferred TBP, c->expr1 will be set. */
3624 if (!c
->expr1
&& csym
)
3626 if (csym
->attr
.abstract
)
3628 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3629 csym
->name
, &c
->loc
);
3633 /* Subroutines without the RECURSIVE attribution are not allowed to
3635 if (is_illegal_recursion (csym
, gfc_current_ns
))
3637 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3638 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3639 "as subroutine %qs is not RECURSIVE",
3640 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3642 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3643 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3649 /* Switch off assumed size checking and do this again for certain kinds
3650 of procedure, once the procedure itself is resolved. */
3651 need_full_assumed_size
++;
3654 ptype
= csym
->attr
.proc
;
3656 no_formal_args
= csym
&& is_external_proc (csym
)
3657 && gfc_sym_get_dummy_args (csym
) == NULL
;
3658 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3661 /* Resume assumed_size checking. */
3662 need_full_assumed_size
--;
3664 /* If external, check for usage. */
3665 if (csym
&& is_external_proc (csym
))
3666 resolve_global_procedure (csym
, &c
->loc
, 1);
3669 if (c
->resolved_sym
== NULL
)
3671 c
->resolved_isym
= NULL
;
3672 switch (procedure_kind (csym
))
3675 t
= resolve_generic_s (c
);
3678 case PTYPE_SPECIFIC
:
3679 t
= resolve_specific_s (c
);
3683 t
= resolve_unknown_s (c
);
3687 gfc_internal_error ("resolve_subroutine(): bad function type");
3691 /* Some checks of elemental subroutine actual arguments. */
3692 if (!resolve_elemental_actual (NULL
, c
))
3696 update_current_proc_array_outer_dependency (csym
);
3698 /* Typebound procedure: Assume the worst. */
3699 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3705 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3706 op1->shape and op2->shape are non-NULL return true if their shapes
3707 match. If both op1->shape and op2->shape are non-NULL return false
3708 if their shapes do not match. If either op1->shape or op2->shape is
3709 NULL, return true. */
3712 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3719 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3721 for (i
= 0; i
< op1
->rank
; i
++)
3723 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3725 gfc_error ("Shapes for operands at %L and %L are not conformable",
3726 &op1
->where
, &op2
->where
);
3736 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3737 For example A .AND. B becomes IAND(A, B). */
3739 logical_to_bitwise (gfc_expr
*e
)
3741 gfc_expr
*tmp
, *op1
, *op2
;
3743 gfc_actual_arglist
*args
= NULL
;
3745 gcc_assert (e
->expr_type
== EXPR_OP
);
3747 isym
= GFC_ISYM_NONE
;
3748 op1
= e
->value
.op
.op1
;
3749 op2
= e
->value
.op
.op2
;
3751 switch (e
->value
.op
.op
)
3754 isym
= GFC_ISYM_NOT
;
3757 isym
= GFC_ISYM_IAND
;
3760 isym
= GFC_ISYM_IOR
;
3762 case INTRINSIC_NEQV
:
3763 isym
= GFC_ISYM_IEOR
;
3766 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3767 Change the old expression to NEQV, which will get replaced by IEOR,
3768 and wrap it in NOT. */
3769 tmp
= gfc_copy_expr (e
);
3770 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3771 tmp
= logical_to_bitwise (tmp
);
3772 isym
= GFC_ISYM_NOT
;
3777 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3780 /* Inherit the original operation's operands as arguments. */
3781 args
= gfc_get_actual_arglist ();
3785 args
->next
= gfc_get_actual_arglist ();
3786 args
->next
->expr
= op2
;
3789 /* Convert the expression to a function call. */
3790 e
->expr_type
= EXPR_FUNCTION
;
3791 e
->value
.function
.actual
= args
;
3792 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3793 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3794 e
->value
.function
.esym
= NULL
;
3796 /* Make up a pre-resolved function call symtree if we need to. */
3797 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3800 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3801 sym
= e
->symtree
->n
.sym
;
3803 sym
->attr
.flavor
= FL_PROCEDURE
;
3804 sym
->attr
.function
= 1;
3805 sym
->attr
.elemental
= 1;
3807 sym
->attr
.referenced
= 1;
3808 gfc_intrinsic_symbol (sym
);
3809 gfc_commit_symbol (sym
);
3812 args
->name
= e
->value
.function
.isym
->formal
->name
;
3813 if (e
->value
.function
.isym
->formal
->next
)
3814 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3819 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3820 candidates in CANDIDATES_LEN. */
3822 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3824 size_t &candidates_len
)
3831 /* Not sure how to properly filter here. Use all for a start.
3832 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3833 these as i suppose they don't make terribly sense. */
3835 if (uop
->n
.uop
->op
!= NULL
)
3836 vec_push (candidates
, candidates_len
, uop
->name
);
3840 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3844 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3847 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3850 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3852 char **candidates
= NULL
;
3853 size_t candidates_len
= 0;
3854 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3855 return gfc_closest_fuzzy_match (op
, candidates
);
3859 /* Callback finding an impure function as an operand to an .and. or
3860 .or. expression. Remember the last function warned about to
3861 avoid double warnings when recursing. */
3864 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3869 static gfc_expr
*last
= NULL
;
3870 bool *found
= (bool *) data
;
3872 if (f
->expr_type
== EXPR_FUNCTION
)
3875 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3876 && !gfc_implicit_pure_function (f
))
3879 gfc_warning (OPT_Wfunction_elimination
,
3880 "Impure function %qs at %L might not be evaluated",
3883 gfc_warning (OPT_Wfunction_elimination
,
3884 "Impure function at %L might not be evaluated",
3894 /* Resolve an operator expression node. This can involve replacing the
3895 operation with a user defined function call. */
3898 resolve_operator (gfc_expr
*e
)
3900 gfc_expr
*op1
, *op2
;
3902 bool dual_locus_error
;
3905 /* Resolve all subnodes-- give them types. */
3907 switch (e
->value
.op
.op
)
3910 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3916 case INTRINSIC_UPLUS
:
3917 case INTRINSIC_UMINUS
:
3918 case INTRINSIC_PARENTHESES
:
3919 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3922 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3924 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3925 "unary operator %qs", &e
->value
.op
.op1
->where
,
3926 gfc_op2string (e
->value
.op
.op
));
3932 /* Typecheck the new node. */
3934 op1
= e
->value
.op
.op1
;
3935 op2
= e
->value
.op
.op2
;
3936 dual_locus_error
= false;
3938 /* op1 and op2 cannot both be BOZ. */
3939 if (op1
&& op1
->ts
.type
== BT_BOZ
3940 && op2
&& op2
->ts
.type
== BT_BOZ
)
3942 gfc_error ("Operands at %L and %L cannot appear as operands of "
3943 "binary operator %qs", &op1
->where
, &op2
->where
,
3944 gfc_op2string (e
->value
.op
.op
));
3948 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3949 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3951 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3955 switch (e
->value
.op
.op
)
3957 case INTRINSIC_UPLUS
:
3958 case INTRINSIC_UMINUS
:
3959 if (op1
->ts
.type
== BT_INTEGER
3960 || op1
->ts
.type
== BT_REAL
3961 || op1
->ts
.type
== BT_COMPLEX
)
3967 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3968 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3971 case INTRINSIC_PLUS
:
3972 case INTRINSIC_MINUS
:
3973 case INTRINSIC_TIMES
:
3974 case INTRINSIC_DIVIDE
:
3975 case INTRINSIC_POWER
:
3976 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3978 gfc_type_convert_binary (e
, 1);
3982 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3984 _("Unexpected derived-type entities in binary intrinsic "
3985 "numeric operator %%<%s%%> at %%L"),
3986 gfc_op2string (e
->value
.op
.op
));
3989 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3990 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3991 gfc_typename (&op2
->ts
));
3994 case INTRINSIC_CONCAT
:
3995 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3996 && op1
->ts
.kind
== op2
->ts
.kind
)
3998 e
->ts
.type
= BT_CHARACTER
;
3999 e
->ts
.kind
= op1
->ts
.kind
;
4004 _("Operands of string concatenation operator at %%L are %s/%s"),
4005 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
4011 case INTRINSIC_NEQV
:
4012 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4014 e
->ts
.type
= BT_LOGICAL
;
4015 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4016 if (op1
->ts
.kind
< e
->ts
.kind
)
4017 gfc_convert_type (op1
, &e
->ts
, 2);
4018 else if (op2
->ts
.kind
< e
->ts
.kind
)
4019 gfc_convert_type (op2
, &e
->ts
, 2);
4021 if (flag_frontend_optimize
&&
4022 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4024 /* Warn about short-circuiting
4025 with impure function as second operand. */
4027 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4032 /* Logical ops on integers become bitwise ops with -fdec. */
4034 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4036 e
->ts
.type
= BT_INTEGER
;
4037 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4038 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4039 gfc_convert_type (op1
, &e
->ts
, 1);
4040 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4041 gfc_convert_type (op2
, &e
->ts
, 1);
4042 e
= logical_to_bitwise (e
);
4046 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4047 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4048 gfc_typename (&op2
->ts
));
4053 /* Logical ops on integers become bitwise ops with -fdec. */
4054 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4056 e
->ts
.type
= BT_INTEGER
;
4057 e
->ts
.kind
= op1
->ts
.kind
;
4058 e
= logical_to_bitwise (e
);
4062 if (op1
->ts
.type
== BT_LOGICAL
)
4064 e
->ts
.type
= BT_LOGICAL
;
4065 e
->ts
.kind
= op1
->ts
.kind
;
4069 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4070 gfc_typename (&op1
->ts
));
4074 case INTRINSIC_GT_OS
:
4076 case INTRINSIC_GE_OS
:
4078 case INTRINSIC_LT_OS
:
4080 case INTRINSIC_LE_OS
:
4081 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4083 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4090 case INTRINSIC_EQ_OS
:
4092 case INTRINSIC_NE_OS
:
4093 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4094 && op1
->ts
.kind
== op2
->ts
.kind
)
4096 e
->ts
.type
= BT_LOGICAL
;
4097 e
->ts
.kind
= gfc_default_logical_kind
;
4101 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4102 if (op1
->ts
.type
== BT_BOZ
)
4104 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4105 "an operand of a relational operator",
4109 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4112 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4116 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4117 if (op2
->ts
.type
== BT_BOZ
)
4119 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4120 "an operand of a relational operator",
4124 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4127 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4131 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4133 gfc_type_convert_binary (e
, 1);
4135 e
->ts
.type
= BT_LOGICAL
;
4136 e
->ts
.kind
= gfc_default_logical_kind
;
4138 if (warn_compare_reals
)
4140 gfc_intrinsic_op op
= e
->value
.op
.op
;
4142 /* Type conversion has made sure that the types of op1 and op2
4143 agree, so it is only necessary to check the first one. */
4144 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4145 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4146 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4150 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4151 msg
= "Equality comparison for %s at %L";
4153 msg
= "Inequality comparison for %s at %L";
4155 gfc_warning (OPT_Wcompare_reals
, msg
,
4156 gfc_typename (&op1
->ts
), &op1
->where
);
4163 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4165 _("Logicals at %%L must be compared with %s instead of %s"),
4166 (e
->value
.op
.op
== INTRINSIC_EQ
4167 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4168 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4171 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4172 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4173 gfc_typename (&op2
->ts
));
4177 case INTRINSIC_USER
:
4178 if (e
->value
.op
.uop
->op
== NULL
)
4180 const char *name
= e
->value
.op
.uop
->name
;
4181 const char *guessed
;
4182 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4184 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4187 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4189 else if (op2
== NULL
)
4190 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4191 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4194 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4195 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4196 gfc_typename (&op2
->ts
));
4197 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4202 case INTRINSIC_PARENTHESES
:
4204 if (e
->ts
.type
== BT_CHARACTER
)
4205 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4209 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4212 /* Deal with arrayness of an operand through an operator. */
4214 switch (e
->value
.op
.op
)
4216 case INTRINSIC_PLUS
:
4217 case INTRINSIC_MINUS
:
4218 case INTRINSIC_TIMES
:
4219 case INTRINSIC_DIVIDE
:
4220 case INTRINSIC_POWER
:
4221 case INTRINSIC_CONCAT
:
4225 case INTRINSIC_NEQV
:
4227 case INTRINSIC_EQ_OS
:
4229 case INTRINSIC_NE_OS
:
4231 case INTRINSIC_GT_OS
:
4233 case INTRINSIC_GE_OS
:
4235 case INTRINSIC_LT_OS
:
4237 case INTRINSIC_LE_OS
:
4239 if (op1
->rank
== 0 && op2
->rank
== 0)
4242 if (op1
->rank
== 0 && op2
->rank
!= 0)
4244 e
->rank
= op2
->rank
;
4246 if (e
->shape
== NULL
)
4247 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4250 if (op1
->rank
!= 0 && op2
->rank
== 0)
4252 e
->rank
= op1
->rank
;
4254 if (e
->shape
== NULL
)
4255 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4258 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4260 if (op1
->rank
== op2
->rank
)
4262 e
->rank
= op1
->rank
;
4263 if (e
->shape
== NULL
)
4265 t
= compare_shapes (op1
, op2
);
4269 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4274 /* Allow higher level expressions to work. */
4277 /* Try user-defined operators, and otherwise throw an error. */
4278 dual_locus_error
= true;
4280 _("Inconsistent ranks for operator at %%L and %%L"));
4287 case INTRINSIC_PARENTHESES
:
4289 case INTRINSIC_UPLUS
:
4290 case INTRINSIC_UMINUS
:
4291 /* Simply copy arrayness attribute */
4292 e
->rank
= op1
->rank
;
4294 if (e
->shape
== NULL
)
4295 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4305 /* Attempt to simplify the expression. */
4308 t
= gfc_simplify_expr (e
, 0);
4309 /* Some calls do not succeed in simplification and return false
4310 even though there is no error; e.g. variable references to
4311 PARAMETER arrays. */
4312 if (!gfc_is_constant_expr (e
))
4320 match m
= gfc_extend_expr (e
);
4323 if (m
== MATCH_ERROR
)
4327 if (dual_locus_error
)
4328 gfc_error (msg
, &op1
->where
, &op2
->where
);
4330 gfc_error (msg
, &e
->where
);
4336 /************** Array resolution subroutines **************/
4339 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4341 /* Compare two integer expressions. */
4343 static compare_result
4344 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4348 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4349 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4352 /* If either of the types isn't INTEGER, we must have
4353 raised an error earlier. */
4355 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4358 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4368 /* Compare an integer expression with an integer. */
4370 static compare_result
4371 compare_bound_int (gfc_expr
*a
, int b
)
4375 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4378 if (a
->ts
.type
!= BT_INTEGER
)
4379 gfc_internal_error ("compare_bound_int(): Bad expression");
4381 i
= mpz_cmp_si (a
->value
.integer
, b
);
4391 /* Compare an integer expression with a mpz_t. */
4393 static compare_result
4394 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4398 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4401 if (a
->ts
.type
!= BT_INTEGER
)
4402 gfc_internal_error ("compare_bound_int(): Bad expression");
4404 i
= mpz_cmp (a
->value
.integer
, b
);
4414 /* Compute the last value of a sequence given by a triplet.
4415 Return 0 if it wasn't able to compute the last value, or if the
4416 sequence if empty, and 1 otherwise. */
4419 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4420 gfc_expr
*stride
, mpz_t last
)
4424 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4425 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4426 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4429 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4430 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4433 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4435 if (compare_bound (start
, end
) == CMP_GT
)
4437 mpz_set (last
, end
->value
.integer
);
4441 if (compare_bound_int (stride
, 0) == CMP_GT
)
4443 /* Stride is positive */
4444 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4449 /* Stride is negative */
4450 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4455 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4456 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4457 mpz_sub (last
, end
->value
.integer
, rem
);
4464 /* Compare a single dimension of an array reference to the array
4468 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4472 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4474 gcc_assert (ar
->stride
[i
] == NULL
);
4475 /* This implies [*] as [*:] and [*:3] are not possible. */
4476 if (ar
->start
[i
] == NULL
)
4478 gcc_assert (ar
->end
[i
] == NULL
);
4483 /* Given start, end and stride values, calculate the minimum and
4484 maximum referenced indexes. */
4486 switch (ar
->dimen_type
[i
])
4489 case DIMEN_THIS_IMAGE
:
4494 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4497 gfc_warning (0, "Array reference at %L is out of bounds "
4498 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4499 mpz_get_si (ar
->start
[i
]->value
.integer
),
4500 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4502 gfc_warning (0, "Array reference at %L is out of bounds "
4503 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4504 mpz_get_si (ar
->start
[i
]->value
.integer
),
4505 mpz_get_si (as
->lower
[i
]->value
.integer
),
4509 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4512 gfc_warning (0, "Array reference at %L is out of bounds "
4513 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (ar
->start
[i
]->value
.integer
),
4515 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4517 gfc_warning (0, "Array reference at %L is out of bounds "
4518 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4519 mpz_get_si (ar
->start
[i
]->value
.integer
),
4520 mpz_get_si (as
->upper
[i
]->value
.integer
),
4529 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4530 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4532 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4534 /* Check for zero stride, which is not allowed. */
4535 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4537 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4541 /* if start == len || (stride > 0 && start < len)
4542 || (stride < 0 && start > len),
4543 then the array section contains at least one element. In this
4544 case, there is an out-of-bounds access if
4545 (start < lower || start > upper). */
4546 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4547 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4548 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4549 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4550 && comp_start_end
== CMP_GT
))
4552 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4554 gfc_warning (0, "Lower array reference at %L is out of bounds "
4555 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4556 mpz_get_si (AR_START
->value
.integer
),
4557 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4560 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4562 gfc_warning (0, "Lower array reference at %L is out of bounds "
4563 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4564 mpz_get_si (AR_START
->value
.integer
),
4565 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4570 /* If we can compute the highest index of the array section,
4571 then it also has to be between lower and upper. */
4572 mpz_init (last_value
);
4573 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4576 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4578 gfc_warning (0, "Upper array reference at %L is out of bounds "
4579 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4580 mpz_get_si (last_value
),
4581 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4582 mpz_clear (last_value
);
4585 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4587 gfc_warning (0, "Upper array reference at %L is out of bounds "
4588 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4589 mpz_get_si (last_value
),
4590 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4591 mpz_clear (last_value
);
4595 mpz_clear (last_value
);
4603 gfc_internal_error ("check_dimension(): Bad array reference");
4610 /* Compare an array reference with an array specification. */
4613 compare_spec_to_ref (gfc_array_ref
*ar
)
4620 /* TODO: Full array sections are only allowed as actual parameters. */
4621 if (as
->type
== AS_ASSUMED_SIZE
4622 && (/*ar->type == AR_FULL
4623 ||*/ (ar
->type
== AR_SECTION
4624 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4626 gfc_error ("Rightmost upper bound of assumed size array section "
4627 "not specified at %L", &ar
->where
);
4631 if (ar
->type
== AR_FULL
)
4634 if (as
->rank
!= ar
->dimen
)
4636 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4637 &ar
->where
, ar
->dimen
, as
->rank
);
4641 /* ar->codimen == 0 is a local array. */
4642 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4644 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4645 &ar
->where
, ar
->codimen
, as
->corank
);
4649 for (i
= 0; i
< as
->rank
; i
++)
4650 if (!check_dimension (i
, ar
, as
))
4653 /* Local access has no coarray spec. */
4654 if (ar
->codimen
!= 0)
4655 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4657 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4658 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4660 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4661 i
+ 1 - as
->rank
, &ar
->where
);
4664 if (!check_dimension (i
, ar
, as
))
4672 /* Resolve one part of an array index. */
4675 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4676 int force_index_integer_kind
)
4683 if (!gfc_resolve_expr (index
))
4686 if (check_scalar
&& index
->rank
!= 0)
4688 gfc_error ("Array index at %L must be scalar", &index
->where
);
4692 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4694 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4695 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4699 if (index
->ts
.type
== BT_REAL
)
4700 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4704 if ((index
->ts
.kind
!= gfc_index_integer_kind
4705 && force_index_integer_kind
)
4706 || index
->ts
.type
!= BT_INTEGER
)
4709 ts
.type
= BT_INTEGER
;
4710 ts
.kind
= gfc_index_integer_kind
;
4712 gfc_convert_type_warn (index
, &ts
, 2, 0);
4718 /* Resolve one part of an array index. */
4721 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4723 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4726 /* Resolve a dim argument to an intrinsic function. */
4729 gfc_resolve_dim_arg (gfc_expr
*dim
)
4734 if (!gfc_resolve_expr (dim
))
4739 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4744 if (dim
->ts
.type
!= BT_INTEGER
)
4746 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4750 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4755 ts
.type
= BT_INTEGER
;
4756 ts
.kind
= gfc_index_integer_kind
;
4758 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4764 /* Given an expression that contains array references, update those array
4765 references to point to the right array specifications. While this is
4766 filled in during matching, this information is difficult to save and load
4767 in a module, so we take care of it here.
4769 The idea here is that the original array reference comes from the
4770 base symbol. We traverse the list of reference structures, setting
4771 the stored reference to references. Component references can
4772 provide an additional array specification. */
4775 find_array_spec (gfc_expr
*e
)
4780 bool class_as
= false;
4782 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4784 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4788 as
= e
->symtree
->n
.sym
->as
;
4790 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4795 gfc_internal_error ("find_array_spec(): Missing spec");
4802 c
= ref
->u
.c
.component
;
4803 if (c
->attr
.dimension
)
4805 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4806 gfc_internal_error ("find_array_spec(): unused as(1)");
4818 gfc_internal_error ("find_array_spec(): unused as(2)");
4822 /* Resolve an array reference. */
4825 resolve_array_ref (gfc_array_ref
*ar
)
4827 int i
, check_scalar
;
4830 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4832 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4834 /* Do not force gfc_index_integer_kind for the start. We can
4835 do fine with any integer kind. This avoids temporary arrays
4836 created for indexing with a vector. */
4837 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4839 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4841 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4846 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4850 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4854 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4855 if (e
->expr_type
== EXPR_VARIABLE
4856 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4857 ar
->start
[i
] = gfc_get_parentheses (e
);
4861 gfc_error ("Array index at %L is an array of rank %d",
4862 &ar
->c_where
[i
], e
->rank
);
4866 /* Fill in the upper bound, which may be lower than the
4867 specified one for something like a(2:10:5), which is
4868 identical to a(2:7:5). Only relevant for strides not equal
4869 to one. Don't try a division by zero. */
4870 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4871 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4872 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4873 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4877 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4879 if (ar
->end
[i
] == NULL
)
4882 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4884 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4886 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4887 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4889 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4900 if (ar
->type
== AR_FULL
)
4902 if (ar
->as
->rank
== 0)
4903 ar
->type
= AR_ELEMENT
;
4905 /* Make sure array is the same as array(:,:), this way
4906 we don't need to special case all the time. */
4907 ar
->dimen
= ar
->as
->rank
;
4908 for (i
= 0; i
< ar
->dimen
; i
++)
4910 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4912 gcc_assert (ar
->start
[i
] == NULL
);
4913 gcc_assert (ar
->end
[i
] == NULL
);
4914 gcc_assert (ar
->stride
[i
] == NULL
);
4918 /* If the reference type is unknown, figure out what kind it is. */
4920 if (ar
->type
== AR_UNKNOWN
)
4922 ar
->type
= AR_ELEMENT
;
4923 for (i
= 0; i
< ar
->dimen
; i
++)
4924 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4925 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4927 ar
->type
= AR_SECTION
;
4932 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4935 if (ar
->as
->corank
&& ar
->codimen
== 0)
4938 ar
->codimen
= ar
->as
->corank
;
4939 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4940 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4948 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4950 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4952 if (ref
->u
.ss
.start
!= NULL
)
4954 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4957 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4959 gfc_error ("Substring start index at %L must be of type INTEGER",
4960 &ref
->u
.ss
.start
->where
);
4964 if (ref
->u
.ss
.start
->rank
!= 0)
4966 gfc_error ("Substring start index at %L must be scalar",
4967 &ref
->u
.ss
.start
->where
);
4971 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4972 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4973 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4975 gfc_error ("Substring start index at %L is less than one",
4976 &ref
->u
.ss
.start
->where
);
4981 if (ref
->u
.ss
.end
!= NULL
)
4983 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4986 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4988 gfc_error ("Substring end index at %L must be of type INTEGER",
4989 &ref
->u
.ss
.end
->where
);
4993 if (ref
->u
.ss
.end
->rank
!= 0)
4995 gfc_error ("Substring end index at %L must be scalar",
4996 &ref
->u
.ss
.end
->where
);
5000 if (ref
->u
.ss
.length
!= NULL
5001 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5002 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5003 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5005 gfc_error ("Substring end index at %L exceeds the string length",
5006 &ref
->u
.ss
.start
->where
);
5010 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5011 gfc_integer_kinds
[k
].huge
) == 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 is too large",
5016 &ref
->u
.ss
.end
->where
);
5019 /* If the substring has the same length as the original
5020 variable, the reference itself can be deleted. */
5022 if (ref
->u
.ss
.length
!= NULL
5023 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5024 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5025 *equal_length
= true;
5032 /* This function supplies missing substring charlens. */
5035 gfc_resolve_substring_charlen (gfc_expr
*e
)
5038 gfc_expr
*start
, *end
;
5039 gfc_typespec
*ts
= NULL
;
5042 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5044 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5046 if (char_ref
->type
== REF_COMPONENT
)
5047 ts
= &char_ref
->u
.c
.component
->ts
;
5050 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5053 gcc_assert (char_ref
->next
== NULL
);
5057 if (e
->ts
.u
.cl
->length
)
5058 gfc_free_expr (e
->ts
.u
.cl
->length
);
5059 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5063 e
->ts
.type
= BT_CHARACTER
;
5064 e
->ts
.kind
= gfc_default_character_kind
;
5067 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5069 if (char_ref
->u
.ss
.start
)
5070 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5072 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5074 if (char_ref
->u
.ss
.end
)
5075 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5076 else if (e
->expr_type
== EXPR_VARIABLE
)
5079 ts
= &e
->symtree
->n
.sym
->ts
;
5080 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5087 gfc_free_expr (start
);
5088 gfc_free_expr (end
);
5092 /* Length = (end - start + 1).
5093 Check first whether it has a constant length. */
5094 if (gfc_dep_difference (end
, start
, &diff
))
5096 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5099 mpz_add_ui (len
->value
.integer
, diff
, 1);
5101 e
->ts
.u
.cl
->length
= len
;
5102 /* The check for length < 0 is handled below */
5106 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5107 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5108 gfc_get_int_expr (gfc_charlen_int_kind
,
5112 /* F2008, 6.4.1: Both the starting point and the ending point shall
5113 be within the range 1, 2, ..., n unless the starting point exceeds
5114 the ending point, in which case the substring has length zero. */
5116 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5117 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5119 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5120 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5122 /* Make sure that the length is simplified. */
5123 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5124 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5128 /* Resolve subtype references. */
5131 resolve_ref (gfc_expr
*expr
)
5133 int current_part_dimension
, n_components
, seen_part_dimension
;
5134 gfc_ref
*ref
, **prev
;
5137 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5138 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5140 find_array_spec (expr
);
5144 for (prev
= &expr
->ref
; *prev
!= NULL
;
5145 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5146 switch ((*prev
)->type
)
5149 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5158 equal_length
= false;
5159 if (!resolve_substring (*prev
, &equal_length
))
5162 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5164 /* Remove the reference and move the charlen, if any. */
5168 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5169 ref
->u
.ss
.length
= NULL
;
5170 gfc_free_ref_list (ref
);
5175 /* Check constraints on part references. */
5177 current_part_dimension
= 0;
5178 seen_part_dimension
= 0;
5181 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5186 switch (ref
->u
.ar
.type
)
5189 /* Coarray scalar. */
5190 if (ref
->u
.ar
.as
->rank
== 0)
5192 current_part_dimension
= 0;
5197 current_part_dimension
= 1;
5201 current_part_dimension
= 0;
5205 gfc_internal_error ("resolve_ref(): Bad array reference");
5211 if (current_part_dimension
|| seen_part_dimension
)
5214 if (ref
->u
.c
.component
->attr
.pointer
5215 || ref
->u
.c
.component
->attr
.proc_pointer
5216 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5217 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5219 gfc_error ("Component to the right of a part reference "
5220 "with nonzero rank must not have the POINTER "
5221 "attribute at %L", &expr
->where
);
5224 else if (ref
->u
.c
.component
->attr
.allocatable
5225 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5226 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5229 gfc_error ("Component to the right of a part reference "
5230 "with nonzero rank must not have the ALLOCATABLE "
5231 "attribute at %L", &expr
->where
);
5244 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5245 || ref
->next
== NULL
)
5246 && current_part_dimension
5247 && seen_part_dimension
)
5249 gfc_error ("Two or more part references with nonzero rank must "
5250 "not be specified at %L", &expr
->where
);
5254 if (ref
->type
== REF_COMPONENT
)
5256 if (current_part_dimension
)
5257 seen_part_dimension
= 1;
5259 /* reset to make sure */
5260 current_part_dimension
= 0;
5268 /* Given an expression, determine its shape. This is easier than it sounds.
5269 Leaves the shape array NULL if it is not possible to determine the shape. */
5272 expression_shape (gfc_expr
*e
)
5274 mpz_t array
[GFC_MAX_DIMENSIONS
];
5277 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5280 for (i
= 0; i
< e
->rank
; i
++)
5281 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5284 e
->shape
= gfc_get_shape (e
->rank
);
5286 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5291 for (i
--; i
>= 0; i
--)
5292 mpz_clear (array
[i
]);
5296 /* Given a variable expression node, compute the rank of the expression by
5297 examining the base symbol and any reference structures it may have. */
5300 expression_rank (gfc_expr
*e
)
5305 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5306 could lead to serious confusion... */
5307 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5311 if (e
->expr_type
== EXPR_ARRAY
)
5313 /* Constructors can have a rank different from one via RESHAPE(). */
5315 if (e
->symtree
== NULL
)
5321 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5322 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5328 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5330 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5331 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5332 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5334 if (ref
->type
!= REF_ARRAY
)
5337 if (ref
->u
.ar
.type
== AR_FULL
)
5339 rank
= ref
->u
.ar
.as
->rank
;
5343 if (ref
->u
.ar
.type
== AR_SECTION
)
5345 /* Figure out the rank of the section. */
5347 gfc_internal_error ("expression_rank(): Two array specs");
5349 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5350 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5351 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5361 expression_shape (e
);
5366 add_caf_get_intrinsic (gfc_expr
*e
)
5368 gfc_expr
*wrapper
, *tmp_expr
;
5372 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5373 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5378 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5379 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5382 tmp_expr
= XCNEW (gfc_expr
);
5384 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5385 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5386 wrapper
->ts
= e
->ts
;
5387 wrapper
->rank
= e
->rank
;
5389 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5396 remove_caf_get_intrinsic (gfc_expr
*e
)
5398 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5399 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5400 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5401 e
->value
.function
.actual
->expr
= NULL
;
5402 gfc_free_actual_arglist (e
->value
.function
.actual
);
5403 gfc_free_shape (&e
->shape
, e
->rank
);
5409 /* Resolve a variable expression. */
5412 resolve_variable (gfc_expr
*e
)
5419 if (e
->symtree
== NULL
)
5421 sym
= e
->symtree
->n
.sym
;
5423 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5424 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5425 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5427 if (!actual_arg
|| inquiry_argument
)
5429 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5430 "be used as actual argument", sym
->name
, &e
->where
);
5434 /* TS 29113, 407b. */
5435 else if (e
->ts
.type
== BT_ASSUMED
)
5439 gfc_error ("Assumed-type variable %s at %L may only be used "
5440 "as actual argument", sym
->name
, &e
->where
);
5443 else if (inquiry_argument
&& !first_actual_arg
)
5445 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5446 for all inquiry functions in resolve_function; the reason is
5447 that the function-name resolution happens too late in that
5449 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5450 "an inquiry function shall be the first argument",
5451 sym
->name
, &e
->where
);
5455 /* TS 29113, C535b. */
5456 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5457 && CLASS_DATA (sym
)->as
5458 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5459 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5460 && sym
->as
->type
== AS_ASSUMED_RANK
))
5461 && !sym
->attr
.select_rank_temporary
)
5464 && !(cs_base
&& cs_base
->current
5465 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5467 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5468 "actual argument", sym
->name
, &e
->where
);
5471 else if (inquiry_argument
&& !first_actual_arg
)
5473 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5474 for all inquiry functions in resolve_function; the reason is
5475 that the function-name resolution happens too late in that
5477 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5478 "to an inquiry function shall be the first argument",
5479 sym
->name
, &e
->where
);
5484 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5485 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5486 && e
->ref
->next
== NULL
))
5488 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5489 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5492 /* TS 29113, 407b. */
5493 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5494 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5495 && e
->ref
->next
== NULL
))
5497 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5498 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5502 /* TS 29113, C535b. */
5503 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5504 && CLASS_DATA (sym
)->as
5505 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5506 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5507 && sym
->as
->type
== AS_ASSUMED_RANK
))
5509 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5510 && e
->ref
->next
== NULL
))
5512 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5513 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5517 /* For variables that are used in an associate (target => object) where
5518 the object's basetype is array valued while the target is scalar,
5519 the ts' type of the component refs is still array valued, which
5520 can't be translated that way. */
5521 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5522 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5523 && CLASS_DATA (sym
->assoc
->target
)->as
)
5525 gfc_ref
*ref
= e
->ref
;
5531 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5532 /* Stop the loop. */
5542 /* If this is an associate-name, it may be parsed with an array reference
5543 in error even though the target is scalar. Fail directly in this case.
5544 TODO Understand why class scalar expressions must be excluded. */
5545 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5547 if (sym
->ts
.type
== BT_CLASS
)
5548 gfc_fix_class_refs (e
);
5549 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5551 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5553 /* This can happen because the parser did not detect that the
5554 associate name is an array and the expression had no array
5556 gfc_ref
*ref
= gfc_get_ref ();
5557 ref
->type
= REF_ARRAY
;
5558 ref
->u
.ar
= *gfc_get_array_ref();
5559 ref
->u
.ar
.type
= AR_FULL
;
5562 ref
->u
.ar
.as
= sym
->as
;
5563 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5571 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5572 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5574 /* On the other hand, the parser may not have known this is an array;
5575 in this case, we have to add a FULL reference. */
5576 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5578 e
->ref
= gfc_get_ref ();
5579 e
->ref
->type
= REF_ARRAY
;
5580 e
->ref
->u
.ar
.type
= AR_FULL
;
5581 e
->ref
->u
.ar
.dimen
= 0;
5584 /* Like above, but for class types, where the checking whether an array
5585 ref is present is more complicated. Furthermore make sure not to add
5586 the full array ref to _vptr or _len refs. */
5587 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5588 && CLASS_DATA (sym
)->attr
.dimension
5589 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5591 gfc_ref
*ref
, *newref
;
5593 newref
= gfc_get_ref ();
5594 newref
->type
= REF_ARRAY
;
5595 newref
->u
.ar
.type
= AR_FULL
;
5596 newref
->u
.ar
.dimen
= 0;
5597 /* Because this is an associate var and the first ref either is a ref to
5598 the _data component or not, no traversal of the ref chain is
5599 needed. The array ref needs to be inserted after the _data ref,
5600 or when that is not present, which may happend for polymorphic
5601 types, then at the first position. */
5605 else if (ref
->type
== REF_COMPONENT
5606 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5608 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5610 newref
->next
= ref
->next
;
5614 /* Array ref present already. */
5615 gfc_free_ref_list (newref
);
5617 else if (ref
->type
== REF_ARRAY
)
5618 /* Array ref present already. */
5619 gfc_free_ref_list (newref
);
5627 if (e
->ref
&& !resolve_ref (e
))
5630 if (sym
->attr
.flavor
== FL_PROCEDURE
5631 && (!sym
->attr
.function
5632 || (sym
->attr
.function
&& sym
->result
5633 && sym
->result
->attr
.proc_pointer
5634 && !sym
->result
->attr
.function
)))
5636 e
->ts
.type
= BT_PROCEDURE
;
5637 goto resolve_procedure
;
5640 if (sym
->ts
.type
!= BT_UNKNOWN
)
5641 gfc_variable_attr (e
, &e
->ts
);
5642 else if (sym
->attr
.flavor
== FL_PROCEDURE
5643 && sym
->attr
.function
&& sym
->result
5644 && sym
->result
->ts
.type
!= BT_UNKNOWN
5645 && sym
->result
->attr
.proc_pointer
)
5646 e
->ts
= sym
->result
->ts
;
5649 /* Must be a simple variable reference. */
5650 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5655 if (check_assumed_size_reference (sym
, e
))
5658 /* Deal with forward references to entries during gfc_resolve_code, to
5659 satisfy, at least partially, 12.5.2.5. */
5660 if (gfc_current_ns
->entries
5661 && current_entry_id
== sym
->entry_id
5664 && cs_base
->current
->op
!= EXEC_ENTRY
)
5666 gfc_entry_list
*entry
;
5667 gfc_formal_arglist
*formal
;
5669 bool seen
, saved_specification_expr
;
5671 /* If the symbol is a dummy... */
5672 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5674 entry
= gfc_current_ns
->entries
;
5677 /* ...test if the symbol is a parameter of previous entries. */
5678 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5679 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5681 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5688 /* If it has not been seen as a dummy, this is an error. */
5691 if (specification_expr
)
5692 gfc_error ("Variable %qs, used in a specification expression"
5693 ", is referenced at %L before the ENTRY statement "
5694 "in which it is a parameter",
5695 sym
->name
, &cs_base
->current
->loc
);
5697 gfc_error ("Variable %qs is used at %L before the ENTRY "
5698 "statement in which it is a parameter",
5699 sym
->name
, &cs_base
->current
->loc
);
5704 /* Now do the same check on the specification expressions. */
5705 saved_specification_expr
= specification_expr
;
5706 specification_expr
= true;
5707 if (sym
->ts
.type
== BT_CHARACTER
5708 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5712 for (n
= 0; n
< sym
->as
->rank
; n
++)
5714 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5716 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5719 specification_expr
= saved_specification_expr
;
5722 /* Update the symbol's entry level. */
5723 sym
->entry_id
= current_entry_id
+ 1;
5726 /* If a symbol has been host_associated mark it. This is used latter,
5727 to identify if aliasing is possible via host association. */
5728 if (sym
->attr
.flavor
== FL_VARIABLE
5729 && gfc_current_ns
->parent
5730 && (gfc_current_ns
->parent
== sym
->ns
5731 || (gfc_current_ns
->parent
->parent
5732 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5733 sym
->attr
.host_assoc
= 1;
5735 if (gfc_current_ns
->proc_name
5736 && sym
->attr
.dimension
5737 && (sym
->ns
!= gfc_current_ns
5738 || sym
->attr
.use_assoc
5739 || sym
->attr
.in_common
))
5740 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5743 if (t
&& !resolve_procedure_expression (e
))
5746 /* F2008, C617 and C1229. */
5747 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5748 && gfc_is_coindexed (e
))
5750 gfc_ref
*ref
, *ref2
= NULL
;
5752 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5754 if (ref
->type
== REF_COMPONENT
)
5756 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5760 for ( ; ref
; ref
= ref
->next
)
5761 if (ref
->type
== REF_COMPONENT
)
5764 /* Expression itself is not coindexed object. */
5765 if (ref
&& e
->ts
.type
== BT_CLASS
)
5767 gfc_error ("Polymorphic subobject of coindexed object at %L",
5772 /* Expression itself is coindexed object. */
5776 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5777 for ( ; c
; c
= c
->next
)
5778 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5780 gfc_error ("Coindexed object with polymorphic allocatable "
5781 "subcomponent at %L", &e
->where
);
5789 expression_rank (e
);
5791 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5792 add_caf_get_intrinsic (e
);
5794 /* Simplify cases where access to a parameter array results in a
5795 single constant. Suppress errors since those will have been
5796 issued before, as warnings. */
5797 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5799 gfc_push_suppress_errors ();
5800 gfc_simplify_expr (e
, 1);
5801 gfc_pop_suppress_errors ();
5808 /* Checks to see that the correct symbol has been host associated.
5809 The only situation where this arises is that in which a twice
5810 contained function is parsed after the host association is made.
5811 Therefore, on detecting this, change the symbol in the expression
5812 and convert the array reference into an actual arglist if the old
5813 symbol is a variable. */
5815 check_host_association (gfc_expr
*e
)
5817 gfc_symbol
*sym
, *old_sym
;
5821 gfc_actual_arglist
*arg
, *tail
= NULL
;
5822 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5824 /* If the expression is the result of substitution in
5825 interface.c(gfc_extend_expr) because there is no way in
5826 which the host association can be wrong. */
5827 if (e
->symtree
== NULL
5828 || e
->symtree
->n
.sym
== NULL
5829 || e
->user_operator
)
5832 old_sym
= e
->symtree
->n
.sym
;
5834 if (gfc_current_ns
->parent
5835 && old_sym
->ns
!= gfc_current_ns
)
5837 /* Use the 'USE' name so that renamed module symbols are
5838 correctly handled. */
5839 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5841 if (sym
&& old_sym
!= sym
5842 && sym
->ts
.type
== old_sym
->ts
.type
5843 && sym
->attr
.flavor
== FL_PROCEDURE
5844 && sym
->attr
.contained
)
5846 /* Clear the shape, since it might not be valid. */
5847 gfc_free_shape (&e
->shape
, e
->rank
);
5849 /* Give the expression the right symtree! */
5850 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5851 gcc_assert (st
!= NULL
);
5853 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5854 || e
->expr_type
== EXPR_FUNCTION
)
5856 /* Original was function so point to the new symbol, since
5857 the actual argument list is already attached to the
5859 e
->value
.function
.esym
= NULL
;
5864 /* Original was variable so convert array references into
5865 an actual arglist. This does not need any checking now
5866 since resolve_function will take care of it. */
5867 e
->value
.function
.actual
= NULL
;
5868 e
->expr_type
= EXPR_FUNCTION
;
5871 /* Ambiguity will not arise if the array reference is not
5872 the last reference. */
5873 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5874 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5877 gcc_assert (ref
->type
== REF_ARRAY
);
5879 /* Grab the start expressions from the array ref and
5880 copy them into actual arguments. */
5881 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5883 arg
= gfc_get_actual_arglist ();
5884 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5885 if (e
->value
.function
.actual
== NULL
)
5886 tail
= e
->value
.function
.actual
= arg
;
5894 /* Dump the reference list and set the rank. */
5895 gfc_free_ref_list (e
->ref
);
5897 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5900 gfc_resolve_expr (e
);
5904 /* This might have changed! */
5905 return e
->expr_type
== EXPR_FUNCTION
;
5910 gfc_resolve_character_operator (gfc_expr
*e
)
5912 gfc_expr
*op1
= e
->value
.op
.op1
;
5913 gfc_expr
*op2
= e
->value
.op
.op2
;
5914 gfc_expr
*e1
= NULL
;
5915 gfc_expr
*e2
= NULL
;
5917 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5919 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5920 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5921 else if (op1
->expr_type
== EXPR_CONSTANT
)
5922 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5923 op1
->value
.character
.length
);
5925 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5926 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5927 else if (op2
->expr_type
== EXPR_CONSTANT
)
5928 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5929 op2
->value
.character
.length
);
5931 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5941 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5942 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5943 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5944 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5945 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5951 /* Ensure that an character expression has a charlen and, if possible, a
5952 length expression. */
5955 fixup_charlen (gfc_expr
*e
)
5957 /* The cases fall through so that changes in expression type and the need
5958 for multiple fixes are picked up. In all circumstances, a charlen should
5959 be available for the middle end to hang a backend_decl on. */
5960 switch (e
->expr_type
)
5963 gfc_resolve_character_operator (e
);
5967 if (e
->expr_type
== EXPR_ARRAY
)
5968 gfc_resolve_character_array_constructor (e
);
5971 case EXPR_SUBSTRING
:
5972 if (!e
->ts
.u
.cl
&& e
->ref
)
5973 gfc_resolve_substring_charlen (e
);
5978 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5985 /* Update an actual argument to include the passed-object for type-bound
5986 procedures at the right position. */
5988 static gfc_actual_arglist
*
5989 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5992 gcc_assert (argpos
> 0);
5996 gfc_actual_arglist
* result
;
5998 result
= gfc_get_actual_arglist ();
6002 result
->name
= name
;
6008 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6010 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6015 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6018 extract_compcall_passed_object (gfc_expr
* e
)
6022 if (e
->expr_type
== EXPR_UNKNOWN
)
6024 gfc_error ("Error in typebound call at %L",
6029 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6031 if (e
->value
.compcall
.base_object
)
6032 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6035 po
= gfc_get_expr ();
6036 po
->expr_type
= EXPR_VARIABLE
;
6037 po
->symtree
= e
->symtree
;
6038 po
->ref
= gfc_copy_ref (e
->ref
);
6039 po
->where
= e
->where
;
6042 if (!gfc_resolve_expr (po
))
6049 /* Update the arglist of an EXPR_COMPCALL expression to include the
6053 update_compcall_arglist (gfc_expr
* e
)
6056 gfc_typebound_proc
* tbp
;
6058 tbp
= e
->value
.compcall
.tbp
;
6063 po
= extract_compcall_passed_object (e
);
6067 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6073 if (tbp
->pass_arg_num
<= 0)
6076 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6084 /* Extract the passed object from a PPC call (a copy of it). */
6087 extract_ppc_passed_object (gfc_expr
*e
)
6092 po
= gfc_get_expr ();
6093 po
->expr_type
= EXPR_VARIABLE
;
6094 po
->symtree
= e
->symtree
;
6095 po
->ref
= gfc_copy_ref (e
->ref
);
6096 po
->where
= e
->where
;
6098 /* Remove PPC reference. */
6100 while ((*ref
)->next
)
6101 ref
= &(*ref
)->next
;
6102 gfc_free_ref_list (*ref
);
6105 if (!gfc_resolve_expr (po
))
6112 /* Update the actual arglist of a procedure pointer component to include the
6116 update_ppc_arglist (gfc_expr
* e
)
6120 gfc_typebound_proc
* tb
;
6122 ppc
= gfc_get_proc_ptr_comp (e
);
6130 else if (tb
->nopass
)
6133 po
= extract_ppc_passed_object (e
);
6140 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6145 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6147 gfc_error ("Base object for procedure-pointer component call at %L is of"
6148 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6152 gcc_assert (tb
->pass_arg_num
> 0);
6153 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6161 /* Check that the object a TBP is called on is valid, i.e. it must not be
6162 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6165 check_typebound_baseobject (gfc_expr
* e
)
6168 bool return_value
= false;
6170 base
= extract_compcall_passed_object (e
);
6174 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6176 gfc_error ("Error in typebound call at %L", &e
->where
);
6180 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6184 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6186 gfc_error ("Base object for type-bound procedure call at %L is of"
6187 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6191 /* F08:C1230. If the procedure called is NOPASS,
6192 the base object must be scalar. */
6193 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6195 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6196 " be scalar", &e
->where
);
6200 return_value
= true;
6203 gfc_free_expr (base
);
6204 return return_value
;
6208 /* Resolve a call to a type-bound procedure, either function or subroutine,
6209 statically from the data in an EXPR_COMPCALL expression. The adapted
6210 arglist and the target-procedure symtree are returned. */
6213 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6214 gfc_actual_arglist
** actual
)
6216 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6217 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6219 /* Update the actual arglist for PASS. */
6220 if (!update_compcall_arglist (e
))
6223 *actual
= e
->value
.compcall
.actual
;
6224 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6226 gfc_free_ref_list (e
->ref
);
6228 e
->value
.compcall
.actual
= NULL
;
6230 /* If we find a deferred typebound procedure, check for derived types
6231 that an overriding typebound procedure has not been missed. */
6232 if (e
->value
.compcall
.name
6233 && !e
->value
.compcall
.tbp
->non_overridable
6234 && e
->value
.compcall
.base_object
6235 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6238 gfc_symbol
*derived
;
6240 /* Use the derived type of the base_object. */
6241 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6244 /* If necessary, go through the inheritance chain. */
6245 while (!st
&& derived
)
6247 /* Look for the typebound procedure 'name'. */
6248 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6249 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6250 e
->value
.compcall
.name
);
6252 derived
= gfc_get_derived_super_type (derived
);
6255 /* Now find the specific name in the derived type namespace. */
6256 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6257 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6258 derived
->ns
, 1, &st
);
6266 /* Get the ultimate declared type from an expression. In addition,
6267 return the last class/derived type reference and the copy of the
6268 reference list. If check_types is set true, derived types are
6269 identified as well as class references. */
6271 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6272 gfc_expr
*e
, bool check_types
)
6274 gfc_symbol
*declared
;
6281 *new_ref
= gfc_copy_ref (e
->ref
);
6283 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6285 if (ref
->type
!= REF_COMPONENT
)
6288 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6289 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6290 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6292 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6298 if (declared
== NULL
)
6299 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6305 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6306 which of the specific bindings (if any) matches the arglist and transform
6307 the expression into a call of that binding. */
6310 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6312 gfc_typebound_proc
* genproc
;
6313 const char* genname
;
6315 gfc_symbol
*derived
;
6317 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6318 genname
= e
->value
.compcall
.name
;
6319 genproc
= e
->value
.compcall
.tbp
;
6321 if (!genproc
->is_generic
)
6324 /* Try the bindings on this type and in the inheritance hierarchy. */
6325 for (; genproc
; genproc
= genproc
->overridden
)
6329 gcc_assert (genproc
->is_generic
);
6330 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6333 gfc_actual_arglist
* args
;
6336 gcc_assert (g
->specific
);
6338 if (g
->specific
->error
)
6341 target
= g
->specific
->u
.specific
->n
.sym
;
6343 /* Get the right arglist by handling PASS/NOPASS. */
6344 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6345 if (!g
->specific
->nopass
)
6348 po
= extract_compcall_passed_object (e
);
6351 gfc_free_actual_arglist (args
);
6355 gcc_assert (g
->specific
->pass_arg_num
> 0);
6356 gcc_assert (!g
->specific
->error
);
6357 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6358 g
->specific
->pass_arg
);
6360 resolve_actual_arglist (args
, target
->attr
.proc
,
6361 is_external_proc (target
)
6362 && gfc_sym_get_dummy_args (target
) == NULL
);
6364 /* Check if this arglist matches the formal. */
6365 matches
= gfc_arglist_matches_symbol (&args
, target
);
6367 /* Clean up and break out of the loop if we've found it. */
6368 gfc_free_actual_arglist (args
);
6371 e
->value
.compcall
.tbp
= g
->specific
;
6372 genname
= g
->specific_st
->name
;
6373 /* Pass along the name for CLASS methods, where the vtab
6374 procedure pointer component has to be referenced. */
6382 /* Nothing matching found! */
6383 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6384 " %qs at %L", genname
, &e
->where
);
6388 /* Make sure that we have the right specific instance for the name. */
6389 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6391 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6393 e
->value
.compcall
.tbp
= st
->n
.tb
;
6399 /* Resolve a call to a type-bound subroutine. */
6402 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6404 gfc_actual_arglist
* newactual
;
6405 gfc_symtree
* target
;
6407 /* Check that's really a SUBROUTINE. */
6408 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6410 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6411 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6412 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6413 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6414 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6417 gfc_error ("%qs at %L should be a SUBROUTINE",
6418 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6423 if (!check_typebound_baseobject (c
->expr1
))
6426 /* Pass along the name for CLASS methods, where the vtab
6427 procedure pointer component has to be referenced. */
6429 *name
= c
->expr1
->value
.compcall
.name
;
6431 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6434 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6436 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6438 /* Transform into an ordinary EXEC_CALL for now. */
6440 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6443 c
->ext
.actual
= newactual
;
6444 c
->symtree
= target
;
6445 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6447 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6449 gfc_free_expr (c
->expr1
);
6450 c
->expr1
= gfc_get_expr ();
6451 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6452 c
->expr1
->symtree
= target
;
6453 c
->expr1
->where
= c
->loc
;
6455 return resolve_call (c
);
6459 /* Resolve a component-call expression. */
6461 resolve_compcall (gfc_expr
* e
, const char **name
)
6463 gfc_actual_arglist
* newactual
;
6464 gfc_symtree
* target
;
6466 /* Check that's really a FUNCTION. */
6467 if (!e
->value
.compcall
.tbp
->function
)
6469 gfc_error ("%qs at %L should be a FUNCTION",
6470 e
->value
.compcall
.name
, &e
->where
);
6475 /* These must not be assign-calls! */
6476 gcc_assert (!e
->value
.compcall
.assign
);
6478 if (!check_typebound_baseobject (e
))
6481 /* Pass along the name for CLASS methods, where the vtab
6482 procedure pointer component has to be referenced. */
6484 *name
= e
->value
.compcall
.name
;
6486 if (!resolve_typebound_generic_call (e
, name
))
6488 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6490 /* Take the rank from the function's symbol. */
6491 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6492 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6494 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6495 arglist to the TBP's binding target. */
6497 if (!resolve_typebound_static (e
, &target
, &newactual
))
6500 e
->value
.function
.actual
= newactual
;
6501 e
->value
.function
.name
= NULL
;
6502 e
->value
.function
.esym
= target
->n
.sym
;
6503 e
->value
.function
.isym
= NULL
;
6504 e
->symtree
= target
;
6505 e
->ts
= target
->n
.sym
->ts
;
6506 e
->expr_type
= EXPR_FUNCTION
;
6508 /* Resolution is not necessary if this is a class subroutine; this
6509 function only has to identify the specific proc. Resolution of
6510 the call will be done next in resolve_typebound_call. */
6511 return gfc_resolve_expr (e
);
6515 static bool resolve_fl_derived (gfc_symbol
*sym
);
6518 /* Resolve a typebound function, or 'method'. First separate all
6519 the non-CLASS references by calling resolve_compcall directly. */
6522 resolve_typebound_function (gfc_expr
* e
)
6524 gfc_symbol
*declared
;
6536 /* Deal with typebound operators for CLASS objects. */
6537 expr
= e
->value
.compcall
.base_object
;
6538 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6539 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6541 /* If the base_object is not a variable, the corresponding actual
6542 argument expression must be stored in e->base_expression so
6543 that the corresponding tree temporary can be used as the base
6544 object in gfc_conv_procedure_call. */
6545 if (expr
->expr_type
!= EXPR_VARIABLE
)
6547 gfc_actual_arglist
*args
;
6549 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6551 if (expr
== args
->expr
)
6556 /* Since the typebound operators are generic, we have to ensure
6557 that any delays in resolution are corrected and that the vtab
6560 declared
= ts
.u
.derived
;
6561 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6562 if (c
->ts
.u
.derived
== NULL
)
6563 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6565 if (!resolve_compcall (e
, &name
))
6568 /* Use the generic name if it is there. */
6569 name
= name
? name
: e
->value
.function
.esym
->name
;
6570 e
->symtree
= expr
->symtree
;
6571 e
->ref
= gfc_copy_ref (expr
->ref
);
6572 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6574 /* Trim away the extraneous references that emerge from nested
6575 use of interface.c (extend_expr). */
6576 if (class_ref
&& class_ref
->next
)
6578 gfc_free_ref_list (class_ref
->next
);
6579 class_ref
->next
= NULL
;
6581 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6583 gfc_free_ref_list (e
->ref
);
6587 gfc_add_vptr_component (e
);
6588 gfc_add_component_ref (e
, name
);
6589 e
->value
.function
.esym
= NULL
;
6590 if (expr
->expr_type
!= EXPR_VARIABLE
)
6591 e
->base_expr
= expr
;
6596 return resolve_compcall (e
, NULL
);
6598 if (!resolve_ref (e
))
6601 /* Get the CLASS declared type. */
6602 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6604 if (!resolve_fl_derived (declared
))
6607 /* Weed out cases of the ultimate component being a derived type. */
6608 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6609 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6611 gfc_free_ref_list (new_ref
);
6612 return resolve_compcall (e
, NULL
);
6615 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6617 /* Treat the call as if it is a typebound procedure, in order to roll
6618 out the correct name for the specific function. */
6619 if (!resolve_compcall (e
, &name
))
6621 gfc_free_ref_list (new_ref
);
6628 /* Convert the expression to a procedure pointer component call. */
6629 e
->value
.function
.esym
= NULL
;
6635 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6636 gfc_add_vptr_component (e
);
6637 gfc_add_component_ref (e
, name
);
6639 /* Recover the typespec for the expression. This is really only
6640 necessary for generic procedures, where the additional call
6641 to gfc_add_component_ref seems to throw the collection of the
6642 correct typespec. */
6646 gfc_free_ref_list (new_ref
);
6651 /* Resolve a typebound subroutine, or 'method'. First separate all
6652 the non-CLASS references by calling resolve_typebound_call
6656 resolve_typebound_subroutine (gfc_code
*code
)
6658 gfc_symbol
*declared
;
6668 st
= code
->expr1
->symtree
;
6670 /* Deal with typebound operators for CLASS objects. */
6671 expr
= code
->expr1
->value
.compcall
.base_object
;
6672 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6673 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6675 /* If the base_object is not a variable, the corresponding actual
6676 argument expression must be stored in e->base_expression so
6677 that the corresponding tree temporary can be used as the base
6678 object in gfc_conv_procedure_call. */
6679 if (expr
->expr_type
!= EXPR_VARIABLE
)
6681 gfc_actual_arglist
*args
;
6683 args
= code
->expr1
->value
.function
.actual
;
6684 for (; args
; args
= args
->next
)
6685 if (expr
== args
->expr
)
6689 /* Since the typebound operators are generic, we have to ensure
6690 that any delays in resolution are corrected and that the vtab
6692 declared
= expr
->ts
.u
.derived
;
6693 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6694 if (c
->ts
.u
.derived
== NULL
)
6695 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6697 if (!resolve_typebound_call (code
, &name
, NULL
))
6700 /* Use the generic name if it is there. */
6701 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6702 code
->expr1
->symtree
= expr
->symtree
;
6703 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6705 /* Trim away the extraneous references that emerge from nested
6706 use of interface.c (extend_expr). */
6707 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6708 if (class_ref
&& class_ref
->next
)
6710 gfc_free_ref_list (class_ref
->next
);
6711 class_ref
->next
= NULL
;
6713 else if (code
->expr1
->ref
&& !class_ref
)
6715 gfc_free_ref_list (code
->expr1
->ref
);
6716 code
->expr1
->ref
= NULL
;
6719 /* Now use the procedure in the vtable. */
6720 gfc_add_vptr_component (code
->expr1
);
6721 gfc_add_component_ref (code
->expr1
, name
);
6722 code
->expr1
->value
.function
.esym
= NULL
;
6723 if (expr
->expr_type
!= EXPR_VARIABLE
)
6724 code
->expr1
->base_expr
= expr
;
6729 return resolve_typebound_call (code
, NULL
, NULL
);
6731 if (!resolve_ref (code
->expr1
))
6734 /* Get the CLASS declared type. */
6735 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6737 /* Weed out cases of the ultimate component being a derived type. */
6738 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6739 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6741 gfc_free_ref_list (new_ref
);
6742 return resolve_typebound_call (code
, NULL
, NULL
);
6745 if (!resolve_typebound_call (code
, &name
, &overridable
))
6747 gfc_free_ref_list (new_ref
);
6750 ts
= code
->expr1
->ts
;
6754 /* Convert the expression to a procedure pointer component call. */
6755 code
->expr1
->value
.function
.esym
= NULL
;
6756 code
->expr1
->symtree
= st
;
6759 code
->expr1
->ref
= new_ref
;
6761 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6762 gfc_add_vptr_component (code
->expr1
);
6763 gfc_add_component_ref (code
->expr1
, name
);
6765 /* Recover the typespec for the expression. This is really only
6766 necessary for generic procedures, where the additional call
6767 to gfc_add_component_ref seems to throw the collection of the
6768 correct typespec. */
6769 code
->expr1
->ts
= ts
;
6772 gfc_free_ref_list (new_ref
);
6778 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6781 resolve_ppc_call (gfc_code
* c
)
6783 gfc_component
*comp
;
6785 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6786 gcc_assert (comp
!= NULL
);
6788 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6789 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6791 if (!comp
->attr
.subroutine
)
6792 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6794 if (!resolve_ref (c
->expr1
))
6797 if (!update_ppc_arglist (c
->expr1
))
6800 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6802 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6803 !(comp
->ts
.interface
6804 && comp
->ts
.interface
->formal
)))
6807 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6810 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6816 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6819 resolve_expr_ppc (gfc_expr
* e
)
6821 gfc_component
*comp
;
6823 comp
= gfc_get_proc_ptr_comp (e
);
6824 gcc_assert (comp
!= NULL
);
6826 /* Convert to EXPR_FUNCTION. */
6827 e
->expr_type
= EXPR_FUNCTION
;
6828 e
->value
.function
.isym
= NULL
;
6829 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6831 if (comp
->as
!= NULL
)
6832 e
->rank
= comp
->as
->rank
;
6834 if (!comp
->attr
.function
)
6835 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6837 if (!resolve_ref (e
))
6840 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6841 !(comp
->ts
.interface
6842 && comp
->ts
.interface
->formal
)))
6845 if (!update_ppc_arglist (e
))
6848 if (!check_pure_function(e
))
6851 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6858 gfc_is_expandable_expr (gfc_expr
*e
)
6860 gfc_constructor
*con
;
6862 if (e
->expr_type
== EXPR_ARRAY
)
6864 /* Traverse the constructor looking for variables that are flavor
6865 parameter. Parameters must be expanded since they are fully used at
6867 con
= gfc_constructor_first (e
->value
.constructor
);
6868 for (; con
; con
= gfc_constructor_next (con
))
6870 if (con
->expr
->expr_type
== EXPR_VARIABLE
6871 && con
->expr
->symtree
6872 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6873 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6875 if (con
->expr
->expr_type
== EXPR_ARRAY
6876 && gfc_is_expandable_expr (con
->expr
))
6885 /* Sometimes variables in specification expressions of the result
6886 of module procedures in submodules wind up not being the 'real'
6887 dummy. Find this, if possible, in the namespace of the first
6891 fixup_unique_dummy (gfc_expr
*e
)
6893 gfc_symtree
*st
= NULL
;
6894 gfc_symbol
*s
= NULL
;
6896 if (e
->symtree
->n
.sym
->ns
->proc_name
6897 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6898 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6901 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6904 && st
->n
.sym
!= NULL
6905 && st
->n
.sym
->attr
.dummy
)
6909 /* Resolve an expression. That is, make sure that types of operands agree
6910 with their operators, intrinsic operators are converted to function calls
6911 for overloaded types and unresolved function references are resolved. */
6914 gfc_resolve_expr (gfc_expr
*e
)
6917 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6919 if (e
== NULL
|| e
->do_not_resolve_again
)
6922 /* inquiry_argument only applies to variables. */
6923 inquiry_save
= inquiry_argument
;
6924 actual_arg_save
= actual_arg
;
6925 first_actual_arg_save
= first_actual_arg
;
6927 if (e
->expr_type
!= EXPR_VARIABLE
)
6929 inquiry_argument
= false;
6931 first_actual_arg
= false;
6933 else if (e
->symtree
!= NULL
6934 && *e
->symtree
->name
== '@'
6935 && e
->symtree
->n
.sym
->attr
.dummy
)
6937 /* Deal with submodule specification expressions that are not
6938 found to be referenced in module.c(read_cleanup). */
6939 fixup_unique_dummy (e
);
6942 switch (e
->expr_type
)
6945 t
= resolve_operator (e
);
6951 if (check_host_association (e
))
6952 t
= resolve_function (e
);
6954 t
= resolve_variable (e
);
6956 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6957 && e
->ref
->type
!= REF_SUBSTRING
)
6958 gfc_resolve_substring_charlen (e
);
6963 t
= resolve_typebound_function (e
);
6966 case EXPR_SUBSTRING
:
6967 t
= resolve_ref (e
);
6976 t
= resolve_expr_ppc (e
);
6981 if (!resolve_ref (e
))
6984 t
= gfc_resolve_array_constructor (e
);
6985 /* Also try to expand a constructor. */
6988 expression_rank (e
);
6989 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6990 gfc_expand_constructor (e
, false);
6993 /* This provides the opportunity for the length of constructors with
6994 character valued function elements to propagate the string length
6995 to the expression. */
6996 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6998 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6999 here rather then add a duplicate test for it above. */
7000 gfc_expand_constructor (e
, false);
7001 t
= gfc_resolve_character_array_constructor (e
);
7006 case EXPR_STRUCTURE
:
7007 t
= resolve_ref (e
);
7011 t
= resolve_structure_cons (e
, 0);
7015 t
= gfc_simplify_expr (e
, 0);
7019 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7022 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7025 inquiry_argument
= inquiry_save
;
7026 actual_arg
= actual_arg_save
;
7027 first_actual_arg
= first_actual_arg_save
;
7029 /* For some reason, resolving these expressions a second time mangles
7030 the typespec of the expression itself. */
7031 if (t
&& e
->expr_type
== EXPR_VARIABLE
7032 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7033 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7034 e
->do_not_resolve_again
= 1;
7040 /* Resolve an expression from an iterator. They must be scalar and have
7041 INTEGER or (optionally) REAL type. */
7044 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7045 const char *name_msgid
)
7047 if (!gfc_resolve_expr (expr
))
7050 if (expr
->rank
!= 0)
7052 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7056 if (expr
->ts
.type
!= BT_INTEGER
)
7058 if (expr
->ts
.type
== BT_REAL
)
7061 return gfc_notify_std (GFC_STD_F95_DEL
,
7062 "%s at %L must be integer",
7063 _(name_msgid
), &expr
->where
);
7066 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7073 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7081 /* Resolve the expressions in an iterator structure. If REAL_OK is
7082 false allow only INTEGER type iterators, otherwise allow REAL types.
7083 Set own_scope to true for ac-implied-do and data-implied-do as those
7084 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7087 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7089 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7092 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7093 _("iterator variable")))
7096 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7097 "Start expression in DO loop"))
7100 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7101 "End expression in DO loop"))
7104 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7105 "Step expression in DO loop"))
7108 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7110 if ((iter
->step
->ts
.type
== BT_INTEGER
7111 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7112 || (iter
->step
->ts
.type
== BT_REAL
7113 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7115 gfc_error ("Step expression in DO loop at %L cannot be zero",
7116 &iter
->step
->where
);
7121 /* Convert start, end, and step to the same type as var. */
7122 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7123 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7124 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7126 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7127 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7128 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7130 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7131 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7132 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7134 if (iter
->start
->expr_type
== EXPR_CONSTANT
7135 && iter
->end
->expr_type
== EXPR_CONSTANT
7136 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7139 if (iter
->start
->ts
.type
== BT_INTEGER
)
7141 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7142 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7146 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7147 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7149 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7150 gfc_warning (OPT_Wzerotrip
,
7151 "DO loop at %L will be executed zero times",
7152 &iter
->step
->where
);
7155 if (iter
->end
->expr_type
== EXPR_CONSTANT
7156 && iter
->end
->ts
.type
== BT_INTEGER
7157 && iter
->step
->expr_type
== EXPR_CONSTANT
7158 && iter
->step
->ts
.type
== BT_INTEGER
7159 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7160 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7162 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7163 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7165 if (is_step_positive
7166 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7167 gfc_warning (OPT_Wundefined_do_loop
,
7168 "DO loop at %L is undefined as it overflows",
7169 &iter
->step
->where
);
7170 else if (!is_step_positive
7171 && mpz_cmp (iter
->end
->value
.integer
,
7172 gfc_integer_kinds
[k
].min_int
) == 0)
7173 gfc_warning (OPT_Wundefined_do_loop
,
7174 "DO loop at %L is undefined as it underflows",
7175 &iter
->step
->where
);
7182 /* Traversal function for find_forall_index. f == 2 signals that
7183 that variable itself is not to be checked - only the references. */
7186 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7188 if (expr
->expr_type
!= EXPR_VARIABLE
)
7191 /* A scalar assignment */
7192 if (!expr
->ref
|| *f
== 1)
7194 if (expr
->symtree
->n
.sym
== sym
)
7206 /* Check whether the FORALL index appears in the expression or not.
7207 Returns true if SYM is found in EXPR. */
7210 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7212 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7219 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7220 to be a scalar INTEGER variable. The subscripts and stride are scalar
7221 INTEGERs, and if stride is a constant it must be nonzero.
7222 Furthermore "A subscript or stride in a forall-triplet-spec shall
7223 not contain a reference to any index-name in the
7224 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7227 resolve_forall_iterators (gfc_forall_iterator
*it
)
7229 gfc_forall_iterator
*iter
, *iter2
;
7231 for (iter
= it
; iter
; iter
= iter
->next
)
7233 if (gfc_resolve_expr (iter
->var
)
7234 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7235 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7238 if (gfc_resolve_expr (iter
->start
)
7239 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7240 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7241 &iter
->start
->where
);
7242 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7243 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7245 if (gfc_resolve_expr (iter
->end
)
7246 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7247 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7249 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7250 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7252 if (gfc_resolve_expr (iter
->stride
))
7254 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7255 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7256 &iter
->stride
->where
, "INTEGER");
7258 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7259 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7260 gfc_error ("FORALL stride expression at %L cannot be zero",
7261 &iter
->stride
->where
);
7263 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7264 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7267 for (iter
= it
; iter
; iter
= iter
->next
)
7268 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7270 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7271 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7272 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7273 gfc_error ("FORALL index %qs may not appear in triplet "
7274 "specification at %L", iter
->var
->symtree
->name
,
7275 &iter2
->start
->where
);
7280 /* Given a pointer to a symbol that is a derived type, see if it's
7281 inaccessible, i.e. if it's defined in another module and the components are
7282 PRIVATE. The search is recursive if necessary. Returns zero if no
7283 inaccessible components are found, nonzero otherwise. */
7286 derived_inaccessible (gfc_symbol
*sym
)
7290 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7293 for (c
= sym
->components
; c
; c
= c
->next
)
7295 /* Prevent an infinite loop through this function. */
7296 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7297 && sym
== c
->ts
.u
.derived
)
7300 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7308 /* Resolve the argument of a deallocate expression. The expression must be
7309 a pointer or a full array. */
7312 resolve_deallocate_expr (gfc_expr
*e
)
7314 symbol_attribute attr
;
7315 int allocatable
, pointer
;
7321 if (!gfc_resolve_expr (e
))
7324 if (e
->expr_type
!= EXPR_VARIABLE
)
7327 sym
= e
->symtree
->n
.sym
;
7328 unlimited
= UNLIMITED_POLY(sym
);
7330 if (sym
->ts
.type
== BT_CLASS
)
7332 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7333 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7337 allocatable
= sym
->attr
.allocatable
;
7338 pointer
= sym
->attr
.pointer
;
7340 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7345 if (ref
->u
.ar
.type
!= AR_FULL
7346 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7347 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7352 c
= ref
->u
.c
.component
;
7353 if (c
->ts
.type
== BT_CLASS
)
7355 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7356 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7360 allocatable
= c
->attr
.allocatable
;
7361 pointer
= c
->attr
.pointer
;
7372 attr
= gfc_expr_attr (e
);
7374 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7377 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7383 if (gfc_is_coindexed (e
))
7385 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7390 && !gfc_check_vardef_context (e
, true, true, false,
7391 _("DEALLOCATE object")))
7393 if (!gfc_check_vardef_context (e
, false, true, false,
7394 _("DEALLOCATE object")))
7401 /* Returns true if the expression e contains a reference to the symbol sym. */
7403 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7405 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7412 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7414 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7418 /* Given the expression node e for an allocatable/pointer of derived type to be
7419 allocated, get the expression node to be initialized afterwards (needed for
7420 derived types with default initializers, and derived types with allocatable
7421 components that need nullification.) */
7424 gfc_expr_to_initialize (gfc_expr
*e
)
7430 result
= gfc_copy_expr (e
);
7432 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7433 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7434 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7436 ref
->u
.ar
.type
= AR_FULL
;
7438 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7439 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7444 gfc_free_shape (&result
->shape
, result
->rank
);
7446 /* Recalculate rank, shape, etc. */
7447 gfc_resolve_expr (result
);
7452 /* If the last ref of an expression is an array ref, return a copy of the
7453 expression with that one removed. Otherwise, a copy of the original
7454 expression. This is used for allocate-expressions and pointer assignment
7455 LHS, where there may be an array specification that needs to be stripped
7456 off when using gfc_check_vardef_context. */
7459 remove_last_array_ref (gfc_expr
* e
)
7464 e2
= gfc_copy_expr (e
);
7465 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7466 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7468 gfc_free_ref_list (*r
);
7477 /* Used in resolve_allocate_expr to check that a allocation-object and
7478 a source-expr are conformable. This does not catch all possible
7479 cases; in particular a runtime checking is needed. */
7482 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7485 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7487 /* First compare rank. */
7488 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7489 || (!tail
&& e1
->rank
!= e2
->rank
))
7491 gfc_error ("Source-expr at %L must be scalar or have the "
7492 "same rank as the allocate-object at %L",
7493 &e1
->where
, &e2
->where
);
7504 for (i
= 0; i
< e1
->rank
; i
++)
7506 if (tail
->u
.ar
.start
[i
] == NULL
)
7509 if (tail
->u
.ar
.end
[i
])
7511 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7512 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7513 mpz_add_ui (s
, s
, 1);
7517 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7520 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7522 gfc_error ("Source-expr at %L and allocate-object at %L must "
7523 "have the same shape", &e1
->where
, &e2
->where
);
7536 /* Resolve the expression in an ALLOCATE statement, doing the additional
7537 checks to see whether the expression is OK or not. The expression must
7538 have a trailing array reference that gives the size of the array. */
7541 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7543 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7547 symbol_attribute attr
;
7548 gfc_ref
*ref
, *ref2
;
7551 gfc_symbol
*sym
= NULL
;
7556 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7557 checking of coarrays. */
7558 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7559 if (ref
->next
== NULL
)
7562 if (ref
&& ref
->type
== REF_ARRAY
)
7563 ref
->u
.ar
.in_allocate
= true;
7565 if (!gfc_resolve_expr (e
))
7568 /* Make sure the expression is allocatable or a pointer. If it is
7569 pointer, the next-to-last reference must be a pointer. */
7573 sym
= e
->symtree
->n
.sym
;
7575 /* Check whether ultimate component is abstract and CLASS. */
7578 /* Is the allocate-object unlimited polymorphic? */
7579 unlimited
= UNLIMITED_POLY(e
);
7581 if (e
->expr_type
!= EXPR_VARIABLE
)
7584 attr
= gfc_expr_attr (e
);
7585 pointer
= attr
.pointer
;
7586 dimension
= attr
.dimension
;
7587 codimension
= attr
.codimension
;
7591 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7593 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7594 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7595 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7596 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7597 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7601 allocatable
= sym
->attr
.allocatable
;
7602 pointer
= sym
->attr
.pointer
;
7603 dimension
= sym
->attr
.dimension
;
7604 codimension
= sym
->attr
.codimension
;
7609 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7614 if (ref
->u
.ar
.codimen
> 0)
7617 for (n
= ref
->u
.ar
.dimen
;
7618 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7619 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7626 if (ref
->next
!= NULL
)
7634 gfc_error ("Coindexed allocatable object at %L",
7639 c
= ref
->u
.c
.component
;
7640 if (c
->ts
.type
== BT_CLASS
)
7642 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7643 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7644 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7645 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7646 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7650 allocatable
= c
->attr
.allocatable
;
7651 pointer
= c
->attr
.pointer
;
7652 dimension
= c
->attr
.dimension
;
7653 codimension
= c
->attr
.codimension
;
7654 is_abstract
= c
->attr
.abstract
;
7667 /* Check for F08:C628. */
7668 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7670 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7675 /* Some checks for the SOURCE tag. */
7678 /* Check F03:C631. */
7679 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7681 gfc_error ("Type of entity at %L is type incompatible with "
7682 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7686 /* Check F03:C632 and restriction following Note 6.18. */
7687 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7690 /* Check F03:C633. */
7691 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7693 gfc_error ("The allocate-object at %L and the source-expr at %L "
7694 "shall have the same kind type parameter",
7695 &e
->where
, &code
->expr3
->where
);
7699 /* Check F2008, C642. */
7700 if (code
->expr3
->ts
.type
== BT_DERIVED
7701 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7702 || (code
->expr3
->ts
.u
.derived
->from_intmod
7703 == INTMOD_ISO_FORTRAN_ENV
7704 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7705 == ISOFORTRAN_LOCK_TYPE
)))
7707 gfc_error ("The source-expr at %L shall neither be of type "
7708 "LOCK_TYPE nor have a LOCK_TYPE component if "
7709 "allocate-object at %L is a coarray",
7710 &code
->expr3
->where
, &e
->where
);
7714 /* Check TS18508, C702/C703. */
7715 if (code
->expr3
->ts
.type
== BT_DERIVED
7716 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7717 || (code
->expr3
->ts
.u
.derived
->from_intmod
7718 == INTMOD_ISO_FORTRAN_ENV
7719 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7720 == ISOFORTRAN_EVENT_TYPE
)))
7722 gfc_error ("The source-expr at %L shall neither be of type "
7723 "EVENT_TYPE nor have a EVENT_TYPE component if "
7724 "allocate-object at %L is a coarray",
7725 &code
->expr3
->where
, &e
->where
);
7730 /* Check F08:C629. */
7731 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7734 gcc_assert (e
->ts
.type
== BT_CLASS
);
7735 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7736 "type-spec or source-expr", sym
->name
, &e
->where
);
7740 /* Check F08:C632. */
7741 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7742 && !UNLIMITED_POLY (e
))
7746 if (!e
->ts
.u
.cl
->length
)
7749 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7750 code
->ext
.alloc
.ts
.u
.cl
->length
);
7751 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7753 gfc_error ("Allocating %s at %L with type-spec requires the same "
7754 "character-length parameter as in the declaration",
7755 sym
->name
, &e
->where
);
7760 /* In the variable definition context checks, gfc_expr_attr is used
7761 on the expression. This is fooled by the array specification
7762 present in e, thus we have to eliminate that one temporarily. */
7763 e2
= remove_last_array_ref (e
);
7766 t
= gfc_check_vardef_context (e2
, true, true, false,
7767 _("ALLOCATE object"));
7769 t
= gfc_check_vardef_context (e2
, false, true, false,
7770 _("ALLOCATE object"));
7775 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7776 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7778 /* For class arrays, the initialization with SOURCE is done
7779 using _copy and trans_call. It is convenient to exploit that
7780 when the allocated type is different from the declared type but
7781 no SOURCE exists by setting expr3. */
7782 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7784 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7785 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7786 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7788 /* We have to zero initialize the integer variable. */
7789 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7792 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7794 /* Make sure the vtab symbol is present when
7795 the module variables are generated. */
7796 gfc_typespec ts
= e
->ts
;
7798 ts
= code
->expr3
->ts
;
7799 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7800 ts
= code
->ext
.alloc
.ts
;
7802 /* Finding the vtab also publishes the type's symbol. Therefore this
7803 statement is necessary. */
7804 gfc_find_derived_vtab (ts
.u
.derived
);
7806 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7808 /* Again, make sure the vtab symbol is present when
7809 the module variables are generated. */
7810 gfc_typespec
*ts
= NULL
;
7812 ts
= &code
->expr3
->ts
;
7814 ts
= &code
->ext
.alloc
.ts
;
7818 /* Finding the vtab also publishes the type's symbol. Therefore this
7819 statement is necessary. */
7823 if (dimension
== 0 && codimension
== 0)
7826 /* Make sure the last reference node is an array specification. */
7828 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7829 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7834 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7835 "in ALLOCATE statement at %L", &e
->where
))
7837 if (code
->expr3
->rank
!= 0)
7838 *array_alloc_wo_spec
= true;
7841 gfc_error ("Array specification or array-valued SOURCE= "
7842 "expression required in ALLOCATE statement at %L",
7849 gfc_error ("Array specification required in ALLOCATE statement "
7850 "at %L", &e
->where
);
7855 /* Make sure that the array section reference makes sense in the
7856 context of an ALLOCATE specification. */
7861 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7863 switch (ar
->dimen_type
[i
])
7865 case DIMEN_THIS_IMAGE
:
7866 gfc_error ("Coarray specification required in ALLOCATE statement "
7867 "at %L", &e
->where
);
7871 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7873 /* If ar->stride[i] is NULL, we issued a previous error. */
7874 if (ar
->stride
[i
] == NULL
)
7875 gfc_error ("Bad array specification in ALLOCATE statement "
7876 "at %L", &e
->where
);
7879 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7881 gfc_error ("Upper cobound is less than lower cobound at %L",
7882 &ar
->start
[i
]->where
);
7888 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7890 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7891 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7893 gfc_error ("Upper cobound is less than lower cobound "
7894 "of 1 at %L", &ar
->start
[i
]->where
);
7904 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7910 for (i
= 0; i
< ar
->dimen
; i
++)
7912 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7915 switch (ar
->dimen_type
[i
])
7921 if (ar
->start
[i
] != NULL
7922 && ar
->end
[i
] != NULL
7923 && ar
->stride
[i
] == NULL
)
7931 case DIMEN_THIS_IMAGE
:
7932 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7938 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7940 sym
= a
->expr
->symtree
->n
.sym
;
7942 /* TODO - check derived type components. */
7943 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7946 if ((ar
->start
[i
] != NULL
7947 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7948 || (ar
->end
[i
] != NULL
7949 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7951 gfc_error ("%qs must not appear in the array specification at "
7952 "%L in the same ALLOCATE statement where it is "
7953 "itself allocated", sym
->name
, &ar
->where
);
7959 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7961 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7962 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7964 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7966 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7967 "statement at %L", &e
->where
);
7973 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7974 && ar
->stride
[i
] == NULL
)
7977 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7991 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7993 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7994 gfc_alloc
*a
, *p
, *q
;
7997 errmsg
= code
->expr2
;
7999 /* Check the stat variable. */
8002 gfc_check_vardef_context (stat
, false, false, false,
8003 _("STAT variable"));
8005 if ((stat
->ts
.type
!= BT_INTEGER
8006 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8007 || stat
->ref
->type
== REF_COMPONENT
)))
8009 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8010 "variable", &stat
->where
);
8012 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8013 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8015 gfc_ref
*ref1
, *ref2
;
8018 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8019 ref1
= ref1
->next
, ref2
= ref2
->next
)
8021 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8023 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8032 gfc_error ("Stat-variable at %L shall not be %sd within "
8033 "the same %s statement", &stat
->where
, fcn
, fcn
);
8039 /* Check the errmsg variable. */
8043 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8046 gfc_check_vardef_context (errmsg
, false, false, false,
8047 _("ERRMSG variable"));
8049 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8050 F18:R930 errmsg-variable is scalar-default-char-variable
8051 F18:R906 default-char-variable is variable
8052 F18:C906 default-char-variable shall be default character. */
8053 if ((errmsg
->ts
.type
!= BT_CHARACTER
8055 && (errmsg
->ref
->type
== REF_ARRAY
8056 || errmsg
->ref
->type
== REF_COMPONENT
)))
8058 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8059 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8060 "variable", &errmsg
->where
);
8062 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8063 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8065 gfc_ref
*ref1
, *ref2
;
8068 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8069 ref1
= ref1
->next
, ref2
= ref2
->next
)
8071 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8073 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8082 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8083 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8089 /* Check that an allocate-object appears only once in the statement. */
8091 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8094 for (q
= p
->next
; q
; q
= q
->next
)
8097 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8099 /* This is a potential collision. */
8100 gfc_ref
*pr
= pe
->ref
;
8101 gfc_ref
*qr
= qe
->ref
;
8103 /* Follow the references until
8104 a) They start to differ, in which case there is no error;
8105 you can deallocate a%b and a%c in a single statement
8106 b) Both of them stop, which is an error
8107 c) One of them stops, which is also an error. */
8110 if (pr
== NULL
&& qr
== NULL
)
8112 gfc_error ("Allocate-object at %L also appears at %L",
8113 &pe
->where
, &qe
->where
);
8116 else if (pr
!= NULL
&& qr
== NULL
)
8118 gfc_error ("Allocate-object at %L is subobject of"
8119 " object at %L", &pe
->where
, &qe
->where
);
8122 else if (pr
== NULL
&& qr
!= NULL
)
8124 gfc_error ("Allocate-object at %L is subobject of"
8125 " object at %L", &qe
->where
, &pe
->where
);
8128 /* Here, pr != NULL && qr != NULL */
8129 gcc_assert(pr
->type
== qr
->type
);
8130 if (pr
->type
== REF_ARRAY
)
8132 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8134 gcc_assert (qr
->type
== REF_ARRAY
);
8136 if (pr
->next
&& qr
->next
)
8139 gfc_array_ref
*par
= &(pr
->u
.ar
);
8140 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8142 for (i
=0; i
<par
->dimen
; i
++)
8144 if ((par
->start
[i
] != NULL
8145 || qar
->start
[i
] != NULL
)
8146 && gfc_dep_compare_expr (par
->start
[i
],
8147 qar
->start
[i
]) != 0)
8154 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8167 if (strcmp (fcn
, "ALLOCATE") == 0)
8169 bool arr_alloc_wo_spec
= false;
8171 /* Resolving the expr3 in the loop over all objects to allocate would
8172 execute loop invariant code for each loop item. Therefore do it just
8174 if (code
->expr3
&& code
->expr3
->mold
8175 && code
->expr3
->ts
.type
== BT_DERIVED
)
8177 /* Default initialization via MOLD (non-polymorphic). */
8178 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8181 gfc_resolve_expr (rhs
);
8182 gfc_free_expr (code
->expr3
);
8186 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8187 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8189 if (arr_alloc_wo_spec
&& code
->expr3
)
8191 /* Mark the allocate to have to take the array specification
8193 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8198 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8199 resolve_deallocate_expr (a
->expr
);
8204 /************ SELECT CASE resolution subroutines ************/
8206 /* Callback function for our mergesort variant. Determines interval
8207 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8208 op1 > op2. Assumes we're not dealing with the default case.
8209 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8210 There are nine situations to check. */
8213 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8217 if (op1
->low
== NULL
) /* op1 = (:L) */
8219 /* op2 = (:N), so overlap. */
8221 /* op2 = (M:) or (M:N), L < M */
8222 if (op2
->low
!= NULL
8223 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8226 else if (op1
->high
== NULL
) /* op1 = (K:) */
8228 /* op2 = (M:), so overlap. */
8230 /* op2 = (:N) or (M:N), K > N */
8231 if (op2
->high
!= NULL
8232 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8235 else /* op1 = (K:L) */
8237 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8238 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8240 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8241 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8243 else /* op2 = (M:N) */
8247 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8250 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8259 /* Merge-sort a double linked case list, detecting overlap in the
8260 process. LIST is the head of the double linked case list before it
8261 is sorted. Returns the head of the sorted list if we don't see any
8262 overlap, or NULL otherwise. */
8265 check_case_overlap (gfc_case
*list
)
8267 gfc_case
*p
, *q
, *e
, *tail
;
8268 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8270 /* If the passed list was empty, return immediately. */
8277 /* Loop unconditionally. The only exit from this loop is a return
8278 statement, when we've finished sorting the case list. */
8285 /* Count the number of merges we do in this pass. */
8288 /* Loop while there exists a merge to be done. */
8293 /* Count this merge. */
8296 /* Cut the list in two pieces by stepping INSIZE places
8297 forward in the list, starting from P. */
8300 for (i
= 0; i
< insize
; i
++)
8309 /* Now we have two lists. Merge them! */
8310 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8312 /* See from which the next case to merge comes from. */
8315 /* P is empty so the next case must come from Q. */
8320 else if (qsize
== 0 || q
== NULL
)
8329 cmp
= compare_cases (p
, q
);
8332 /* The whole case range for P is less than the
8340 /* The whole case range for Q is greater than
8341 the case range for P. */
8348 /* The cases overlap, or they are the same
8349 element in the list. Either way, we must
8350 issue an error and get the next case from P. */
8351 /* FIXME: Sort P and Q by line number. */
8352 gfc_error ("CASE label at %L overlaps with CASE "
8353 "label at %L", &p
->where
, &q
->where
);
8361 /* Add the next element to the merged list. */
8370 /* P has now stepped INSIZE places along, and so has Q. So
8371 they're the same. */
8376 /* If we have done only one merge or none at all, we've
8377 finished sorting the cases. */
8386 /* Otherwise repeat, merging lists twice the size. */
8392 /* Check to see if an expression is suitable for use in a CASE statement.
8393 Makes sure that all case expressions are scalar constants of the same
8394 type. Return false if anything is wrong. */
8397 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8399 if (e
== NULL
) return true;
8401 if (e
->ts
.type
!= case_expr
->ts
.type
)
8403 gfc_error ("Expression in CASE statement at %L must be of type %s",
8404 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8408 /* C805 (R808) For a given case-construct, each case-value shall be of
8409 the same type as case-expr. For character type, length differences
8410 are allowed, but the kind type parameters shall be the same. */
8412 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8414 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8415 &e
->where
, case_expr
->ts
.kind
);
8419 /* Convert the case value kind to that of case expression kind,
8422 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8423 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8427 gfc_error ("Expression in CASE statement at %L must be scalar",
8436 /* Given a completely parsed select statement, we:
8438 - Validate all expressions and code within the SELECT.
8439 - Make sure that the selection expression is not of the wrong type.
8440 - Make sure that no case ranges overlap.
8441 - Eliminate unreachable cases and unreachable code resulting from
8442 removing case labels.
8444 The standard does allow unreachable cases, e.g. CASE (5:3). But
8445 they are a hassle for code generation, and to prevent that, we just
8446 cut them out here. This is not necessary for overlapping cases
8447 because they are illegal and we never even try to generate code.
8449 We have the additional caveat that a SELECT construct could have
8450 been a computed GOTO in the source code. Fortunately we can fairly
8451 easily work around that here: The case_expr for a "real" SELECT CASE
8452 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8453 we have to do is make sure that the case_expr is a scalar integer
8457 resolve_select (gfc_code
*code
, bool select_type
)
8460 gfc_expr
*case_expr
;
8461 gfc_case
*cp
, *default_case
, *tail
, *head
;
8462 int seen_unreachable
;
8468 if (code
->expr1
== NULL
)
8470 /* This was actually a computed GOTO statement. */
8471 case_expr
= code
->expr2
;
8472 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8473 gfc_error ("Selection expression in computed GOTO statement "
8474 "at %L must be a scalar integer expression",
8477 /* Further checking is not necessary because this SELECT was built
8478 by the compiler, so it should always be OK. Just move the
8479 case_expr from expr2 to expr so that we can handle computed
8480 GOTOs as normal SELECTs from here on. */
8481 code
->expr1
= code
->expr2
;
8486 case_expr
= code
->expr1
;
8487 type
= case_expr
->ts
.type
;
8490 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8492 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8493 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8495 /* Punt. Going on here just produce more garbage error messages. */
8500 if (!select_type
&& case_expr
->rank
!= 0)
8502 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8503 "expression", &case_expr
->where
);
8509 /* Raise a warning if an INTEGER case value exceeds the range of
8510 the case-expr. Later, all expressions will be promoted to the
8511 largest kind of all case-labels. */
8513 if (type
== BT_INTEGER
)
8514 for (body
= code
->block
; body
; body
= body
->block
)
8515 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8518 && gfc_check_integer_range (cp
->low
->value
.integer
,
8519 case_expr
->ts
.kind
) != ARITH_OK
)
8520 gfc_warning (0, "Expression in CASE statement at %L is "
8521 "not in the range of %s", &cp
->low
->where
,
8522 gfc_typename (&case_expr
->ts
));
8525 && cp
->low
!= cp
->high
8526 && gfc_check_integer_range (cp
->high
->value
.integer
,
8527 case_expr
->ts
.kind
) != ARITH_OK
)
8528 gfc_warning (0, "Expression in CASE statement at %L is "
8529 "not in the range of %s", &cp
->high
->where
,
8530 gfc_typename (&case_expr
->ts
));
8533 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8534 of the SELECT CASE expression and its CASE values. Walk the lists
8535 of case values, and if we find a mismatch, promote case_expr to
8536 the appropriate kind. */
8538 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8540 for (body
= code
->block
; body
; body
= body
->block
)
8542 /* Walk the case label list. */
8543 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8545 /* Intercept the DEFAULT case. It does not have a kind. */
8546 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8549 /* Unreachable case ranges are discarded, so ignore. */
8550 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8551 && cp
->low
!= cp
->high
8552 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8556 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8557 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8559 if (cp
->high
!= NULL
8560 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8561 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8566 /* Assume there is no DEFAULT case. */
8567 default_case
= NULL
;
8572 for (body
= code
->block
; body
; body
= body
->block
)
8574 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8576 seen_unreachable
= 0;
8578 /* Walk the case label list, making sure that all case labels
8580 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8582 /* Count the number of cases in the whole construct. */
8585 /* Intercept the DEFAULT case. */
8586 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8588 if (default_case
!= NULL
)
8590 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8591 "by a second DEFAULT CASE at %L",
8592 &default_case
->where
, &cp
->where
);
8603 /* Deal with single value cases and case ranges. Errors are
8604 issued from the validation function. */
8605 if (!validate_case_label_expr (cp
->low
, case_expr
)
8606 || !validate_case_label_expr (cp
->high
, case_expr
))
8612 if (type
== BT_LOGICAL
8613 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8614 || cp
->low
!= cp
->high
))
8616 gfc_error ("Logical range in CASE statement at %L is not "
8617 "allowed", &cp
->low
->where
);
8622 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8625 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8626 if (value
& seen_logical
)
8628 gfc_error ("Constant logical value in CASE statement "
8629 "is repeated at %L",
8634 seen_logical
|= value
;
8637 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8638 && cp
->low
!= cp
->high
8639 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8641 if (warn_surprising
)
8642 gfc_warning (OPT_Wsurprising
,
8643 "Range specification at %L can never be matched",
8646 cp
->unreachable
= 1;
8647 seen_unreachable
= 1;
8651 /* If the case range can be matched, it can also overlap with
8652 other cases. To make sure it does not, we put it in a
8653 double linked list here. We sort that with a merge sort
8654 later on to detect any overlapping cases. */
8658 head
->right
= head
->left
= NULL
;
8663 tail
->right
->left
= tail
;
8670 /* It there was a failure in the previous case label, give up
8671 for this case label list. Continue with the next block. */
8675 /* See if any case labels that are unreachable have been seen.
8676 If so, we eliminate them. This is a bit of a kludge because
8677 the case lists for a single case statement (label) is a
8678 single forward linked lists. */
8679 if (seen_unreachable
)
8681 /* Advance until the first case in the list is reachable. */
8682 while (body
->ext
.block
.case_list
!= NULL
8683 && body
->ext
.block
.case_list
->unreachable
)
8685 gfc_case
*n
= body
->ext
.block
.case_list
;
8686 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8688 gfc_free_case_list (n
);
8691 /* Strip all other unreachable cases. */
8692 if (body
->ext
.block
.case_list
)
8694 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8696 if (cp
->next
->unreachable
)
8698 gfc_case
*n
= cp
->next
;
8699 cp
->next
= cp
->next
->next
;
8701 gfc_free_case_list (n
);
8708 /* See if there were overlapping cases. If the check returns NULL,
8709 there was overlap. In that case we don't do anything. If head
8710 is non-NULL, we prepend the DEFAULT case. The sorted list can
8711 then used during code generation for SELECT CASE constructs with
8712 a case expression of a CHARACTER type. */
8715 head
= check_case_overlap (head
);
8717 /* Prepend the default_case if it is there. */
8718 if (head
!= NULL
&& default_case
)
8720 default_case
->left
= NULL
;
8721 default_case
->right
= head
;
8722 head
->left
= default_case
;
8726 /* Eliminate dead blocks that may be the result if we've seen
8727 unreachable case labels for a block. */
8728 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8730 if (body
->block
->ext
.block
.case_list
== NULL
)
8732 /* Cut the unreachable block from the code chain. */
8733 gfc_code
*c
= body
->block
;
8734 body
->block
= c
->block
;
8736 /* Kill the dead block, but not the blocks below it. */
8738 gfc_free_statements (c
);
8742 /* More than two cases is legal but insane for logical selects.
8743 Issue a warning for it. */
8744 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8745 gfc_warning (OPT_Wsurprising
,
8746 "Logical SELECT CASE block at %L has more that two cases",
8751 /* Check if a derived type is extensible. */
8754 gfc_type_is_extensible (gfc_symbol
*sym
)
8756 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8757 || (sym
->attr
.is_class
8758 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8763 resolve_types (gfc_namespace
*ns
);
8765 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8766 correct as well as possibly the array-spec. */
8769 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8773 gcc_assert (sym
->assoc
);
8774 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8776 /* If this is for SELECT TYPE, the target may not yet be set. In that
8777 case, return. Resolution will be called later manually again when
8779 target
= sym
->assoc
->target
;
8782 gcc_assert (!sym
->assoc
->dangling
);
8784 if (resolve_target
&& !gfc_resolve_expr (target
))
8787 /* For variable targets, we get some attributes from the target. */
8788 if (target
->expr_type
== EXPR_VARIABLE
)
8792 gcc_assert (target
->symtree
);
8793 tsym
= target
->symtree
->n
.sym
;
8795 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8796 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8798 sym
->attr
.target
= tsym
->attr
.target
8799 || gfc_expr_attr (target
).pointer
;
8800 if (is_subref_array (target
))
8801 sym
->attr
.subref_array_pointer
= 1;
8804 if (target
->expr_type
== EXPR_NULL
)
8806 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8809 else if (target
->ts
.type
== BT_UNKNOWN
)
8811 gfc_error ("Selector at %L has no type", &target
->where
);
8815 /* Get type if this was not already set. Note that it can be
8816 some other type than the target in case this is a SELECT TYPE
8817 selector! So we must not update when the type is already there. */
8818 if (sym
->ts
.type
== BT_UNKNOWN
)
8819 sym
->ts
= target
->ts
;
8821 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8823 /* See if this is a valid association-to-variable. */
8824 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8825 && !gfc_has_vector_subscript (target
));
8827 /* Finally resolve if this is an array or not. */
8828 if (sym
->attr
.dimension
&& target
->rank
== 0)
8830 /* primary.c makes the assumption that a reference to an associate
8831 name followed by a left parenthesis is an array reference. */
8832 if (sym
->ts
.type
!= BT_CHARACTER
)
8833 gfc_error ("Associate-name %qs at %L is used as array",
8834 sym
->name
, &sym
->declared_at
);
8835 sym
->attr
.dimension
= 0;
8840 /* We cannot deal with class selectors that need temporaries. */
8841 if (target
->ts
.type
== BT_CLASS
8842 && gfc_ref_needs_temporary_p (target
->ref
))
8844 gfc_error ("CLASS selector at %L needs a temporary which is not "
8845 "yet implemented", &target
->where
);
8849 if (target
->ts
.type
== BT_CLASS
)
8850 gfc_fix_class_refs (target
);
8852 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8855 /* The rank may be incorrectly guessed at parsing, therefore make sure
8856 it is corrected now. */
8857 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8860 sym
->as
= gfc_get_array_spec ();
8862 as
->rank
= target
->rank
;
8863 as
->type
= AS_DEFERRED
;
8864 as
->corank
= gfc_get_corank (target
);
8865 sym
->attr
.dimension
= 1;
8866 if (as
->corank
!= 0)
8867 sym
->attr
.codimension
= 1;
8869 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8871 if (!CLASS_DATA (sym
)->as
)
8872 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8873 as
= CLASS_DATA (sym
)->as
;
8874 as
->rank
= target
->rank
;
8875 as
->type
= AS_DEFERRED
;
8876 as
->corank
= gfc_get_corank (target
);
8877 CLASS_DATA (sym
)->attr
.dimension
= 1;
8878 if (as
->corank
!= 0)
8879 CLASS_DATA (sym
)->attr
.codimension
= 1;
8882 else if (!sym
->attr
.select_rank_temporary
)
8884 /* target's rank is 0, but the type of the sym is still array valued,
8885 which has to be corrected. */
8886 if (sym
->ts
.type
== BT_CLASS
8887 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8890 symbol_attribute attr
;
8891 /* The associated variable's type is still the array type
8892 correct this now. */
8893 gfc_typespec
*ts
= &target
->ts
;
8896 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8901 ts
= &ref
->u
.c
.component
->ts
;
8904 if (ts
->type
== BT_CLASS
)
8905 ts
= &ts
->u
.derived
->components
->ts
;
8911 /* Create a scalar instance of the current class type. Because the
8912 rank of a class array goes into its name, the type has to be
8913 rebuild. The alternative of (re-)setting just the attributes
8914 and as in the current type, destroys the type also in other
8918 sym
->ts
.type
= BT_CLASS
;
8919 attr
= CLASS_DATA (sym
)->attr
;
8921 attr
.associate_var
= 1;
8922 attr
.dimension
= attr
.codimension
= 0;
8923 attr
.class_pointer
= 1;
8924 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8926 /* Make sure the _vptr is set. */
8927 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8928 if (c
->ts
.u
.derived
== NULL
)
8929 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8930 CLASS_DATA (sym
)->attr
.pointer
= 1;
8931 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8932 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8933 gfc_commit_symbol (sym
->ts
.u
.derived
);
8934 /* _vptr now has the _vtab in it, change it to the _vtype. */
8935 if (c
->ts
.u
.derived
->attr
.vtab
)
8936 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8937 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8938 resolve_types (c
->ts
.u
.derived
->ns
);
8942 /* Mark this as an associate variable. */
8943 sym
->attr
.associate_var
= 1;
8945 /* Fix up the type-spec for CHARACTER types. */
8946 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8949 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8951 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8952 && target
->symtree
->n
.sym
->attr
.dummy
8953 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8955 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8956 sym
->ts
.deferred
= 1;
8959 if (!sym
->ts
.u
.cl
->length
8960 && !sym
->ts
.deferred
8961 && target
->expr_type
== EXPR_CONSTANT
)
8963 sym
->ts
.u
.cl
->length
=
8964 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8965 target
->value
.character
.length
);
8967 else if ((!sym
->ts
.u
.cl
->length
8968 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8969 && target
->expr_type
!= EXPR_VARIABLE
)
8971 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8972 sym
->ts
.deferred
= 1;
8974 /* This is reset in trans-stmt.c after the assignment
8975 of the target expression to the associate name. */
8976 sym
->attr
.allocatable
= 1;
8980 /* If the target is a good class object, so is the associate variable. */
8981 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8982 sym
->attr
.class_ok
= 1;
8986 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8987 array reference, where necessary. The symbols are artificial and so
8988 the dimension attribute and arrayspec can also be set. In addition,
8989 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8990 This is corrected here as well.*/
8993 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8994 int rank
, gfc_ref
*ref
)
8996 gfc_ref
*nref
= (*expr1
)->ref
;
8997 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8998 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8999 (*expr1
)->rank
= rank
;
9000 if (sym1
->ts
.type
== BT_CLASS
)
9002 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9003 (*expr1
)->ts
= sym1
->ts
;
9005 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9006 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9007 CLASS_DATA (sym1
)->as
9008 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9012 sym1
->attr
.dimension
= 1;
9013 if (sym1
->as
== NULL
&& sym2
)
9014 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9017 for (; nref
; nref
= nref
->next
)
9018 if (nref
->next
== NULL
)
9021 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9022 nref
->next
= gfc_copy_ref (ref
);
9023 else if (ref
&& !nref
)
9024 (*expr1
)->ref
= gfc_copy_ref (ref
);
9029 build_loc_call (gfc_expr
*sym_expr
)
9032 loc_call
= gfc_get_expr ();
9033 loc_call
->expr_type
= EXPR_FUNCTION
;
9034 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9035 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9036 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9037 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9038 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9039 loc_call
->ts
.type
= BT_INTEGER
;
9040 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9041 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9042 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9043 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9044 loc_call
->where
= sym_expr
->where
;
9048 /* Resolve a SELECT TYPE statement. */
9051 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9053 gfc_symbol
*selector_type
;
9054 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9055 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9058 char name
[GFC_MAX_SYMBOL_LEN
];
9062 gfc_ref
* ref
= NULL
;
9063 gfc_expr
*selector_expr
= NULL
;
9065 ns
= code
->ext
.block
.ns
;
9068 /* Check for F03:C813. */
9069 if (code
->expr1
->ts
.type
!= BT_CLASS
9070 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9072 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9073 "at %L", &code
->loc
);
9077 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9082 gfc_ref
*ref2
= NULL
;
9083 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9084 if (ref
->type
== REF_COMPONENT
9085 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9090 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9091 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9092 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9096 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9097 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9098 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9101 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9102 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9104 /* F2008: C803 The selector expression must not be coindexed. */
9105 if (gfc_is_coindexed (code
->expr2
))
9107 gfc_error ("Selector at %L must not be coindexed",
9108 &code
->expr2
->where
);
9115 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9117 if (gfc_is_coindexed (code
->expr1
))
9119 gfc_error ("Selector at %L must not be coindexed",
9120 &code
->expr1
->where
);
9125 /* Loop over TYPE IS / CLASS IS cases. */
9126 for (body
= code
->block
; body
; body
= body
->block
)
9128 c
= body
->ext
.block
.case_list
;
9132 /* Check for repeated cases. */
9133 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9135 gfc_case
*d
= tail
->ext
.block
.case_list
;
9139 if (c
->ts
.type
== d
->ts
.type
9140 && ((c
->ts
.type
== BT_DERIVED
9141 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9142 && !strcmp (c
->ts
.u
.derived
->name
,
9143 d
->ts
.u
.derived
->name
))
9144 || c
->ts
.type
== BT_UNKNOWN
9145 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9146 && c
->ts
.kind
== d
->ts
.kind
)))
9148 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9149 &c
->where
, &d
->where
);
9155 /* Check F03:C815. */
9156 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9157 && !selector_type
->attr
.unlimited_polymorphic
9158 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9160 gfc_error ("Derived type %qs at %L must be extensible",
9161 c
->ts
.u
.derived
->name
, &c
->where
);
9166 /* Check F03:C816. */
9167 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9168 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9169 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9171 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9172 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9173 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9175 gfc_error ("Unexpected intrinsic type %qs at %L",
9176 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9181 /* Check F03:C814. */
9182 if (c
->ts
.type
== BT_CHARACTER
9183 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9185 gfc_error ("The type-spec at %L shall specify that each length "
9186 "type parameter is assumed", &c
->where
);
9191 /* Intercept the DEFAULT case. */
9192 if (c
->ts
.type
== BT_UNKNOWN
)
9194 /* Check F03:C818. */
9197 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9198 "by a second DEFAULT CASE at %L",
9199 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9204 default_case
= body
;
9211 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9212 target if present. If there are any EXIT statements referring to the
9213 SELECT TYPE construct, this is no problem because the gfc_code
9214 reference stays the same and EXIT is equally possible from the BLOCK
9215 it is changed to. */
9216 code
->op
= EXEC_BLOCK
;
9219 gfc_association_list
* assoc
;
9221 assoc
= gfc_get_association_list ();
9222 assoc
->st
= code
->expr1
->symtree
;
9223 assoc
->target
= gfc_copy_expr (code
->expr2
);
9224 assoc
->target
->where
= code
->expr2
->where
;
9225 /* assoc->variable will be set by resolve_assoc_var. */
9227 code
->ext
.block
.assoc
= assoc
;
9228 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9230 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9233 code
->ext
.block
.assoc
= NULL
;
9235 /* Ensure that the selector rank and arrayspec are available to
9236 correct expressions in which they might be missing. */
9237 if (code
->expr2
&& code
->expr2
->rank
)
9239 rank
= code
->expr2
->rank
;
9240 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9241 if (ref
->next
== NULL
)
9243 if (ref
&& ref
->type
== REF_ARRAY
)
9244 ref
= gfc_copy_ref (ref
);
9246 /* Fixup expr1 if necessary. */
9248 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9250 else if (code
->expr1
->rank
)
9252 rank
= code
->expr1
->rank
;
9253 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9254 if (ref
->next
== NULL
)
9256 if (ref
&& ref
->type
== REF_ARRAY
)
9257 ref
= gfc_copy_ref (ref
);
9260 /* Add EXEC_SELECT to switch on type. */
9261 new_st
= gfc_get_code (code
->op
);
9262 new_st
->expr1
= code
->expr1
;
9263 new_st
->expr2
= code
->expr2
;
9264 new_st
->block
= code
->block
;
9265 code
->expr1
= code
->expr2
= NULL
;
9270 ns
->code
->next
= new_st
;
9272 code
->op
= EXEC_SELECT_TYPE
;
9274 /* Use the intrinsic LOC function to generate an integer expression
9275 for the vtable of the selector. Note that the rank of the selector
9276 expression has to be set to zero. */
9277 gfc_add_vptr_component (code
->expr1
);
9278 code
->expr1
->rank
= 0;
9279 code
->expr1
= build_loc_call (code
->expr1
);
9280 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9282 /* Loop over TYPE IS / CLASS IS cases. */
9283 for (body
= code
->block
; body
; body
= body
->block
)
9287 c
= body
->ext
.block
.case_list
;
9289 /* Generate an index integer expression for address of the
9290 TYPE/CLASS vtable and store it in c->low. The hash expression
9291 is stored in c->high and is used to resolve intrinsic cases. */
9292 if (c
->ts
.type
!= BT_UNKNOWN
)
9294 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9296 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9298 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9299 c
->ts
.u
.derived
->hash_value
);
9303 vtab
= gfc_find_vtab (&c
->ts
);
9304 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9305 e
= CLASS_DATA (vtab
)->initializer
;
9306 c
->high
= gfc_copy_expr (e
);
9307 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9310 ts
.kind
= gfc_integer_4_kind
;
9311 ts
.type
= BT_INTEGER
;
9312 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9316 e
= gfc_lval_expr_from_sym (vtab
);
9317 c
->low
= build_loc_call (e
);
9322 /* Associate temporary to selector. This should only be done
9323 when this case is actually true, so build a new ASSOCIATE
9324 that does precisely this here (instead of using the
9327 if (c
->ts
.type
== BT_CLASS
)
9328 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9329 else if (c
->ts
.type
== BT_DERIVED
)
9330 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9331 else if (c
->ts
.type
== BT_CHARACTER
)
9333 HOST_WIDE_INT charlen
= 0;
9334 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9335 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9336 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9337 snprintf (name
, sizeof (name
),
9338 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9339 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9342 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9345 st
= gfc_find_symtree (ns
->sym_root
, name
);
9346 gcc_assert (st
->n
.sym
->assoc
);
9347 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9348 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9349 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9351 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9352 /* Fixup the target expression if necessary. */
9354 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9357 new_st
= gfc_get_code (EXEC_BLOCK
);
9358 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9359 new_st
->ext
.block
.ns
->code
= body
->next
;
9360 body
->next
= new_st
;
9362 /* Chain in the new list only if it is marked as dangling. Otherwise
9363 there is a CASE label overlap and this is already used. Just ignore,
9364 the error is diagnosed elsewhere. */
9365 if (st
->n
.sym
->assoc
->dangling
)
9367 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9368 st
->n
.sym
->assoc
->dangling
= 0;
9371 resolve_assoc_var (st
->n
.sym
, false);
9374 /* Take out CLASS IS cases for separate treatment. */
9376 while (body
&& body
->block
)
9378 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9380 /* Add to class_is list. */
9381 if (class_is
== NULL
)
9383 class_is
= body
->block
;
9388 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9389 tail
->block
= body
->block
;
9392 /* Remove from EXEC_SELECT list. */
9393 body
->block
= body
->block
->block
;
9406 /* Add a default case to hold the CLASS IS cases. */
9407 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9408 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9410 tail
->ext
.block
.case_list
= gfc_get_case ();
9411 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9413 default_case
= tail
;
9416 /* More than one CLASS IS block? */
9417 if (class_is
->block
)
9421 /* Sort CLASS IS blocks by extension level. */
9425 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9428 /* F03:C817 (check for doubles). */
9429 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9430 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9432 gfc_error ("Double CLASS IS block in SELECT TYPE "
9434 &c2
->ext
.block
.case_list
->where
);
9437 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9438 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9441 (*c1
)->block
= c2
->block
;
9451 /* Generate IF chain. */
9452 if_st
= gfc_get_code (EXEC_IF
);
9454 for (body
= class_is
; body
; body
= body
->block
)
9456 new_st
->block
= gfc_get_code (EXEC_IF
);
9457 new_st
= new_st
->block
;
9458 /* Set up IF condition: Call _gfortran_is_extension_of. */
9459 new_st
->expr1
= gfc_get_expr ();
9460 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9461 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9462 new_st
->expr1
->ts
.kind
= 4;
9463 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9464 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9465 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9466 /* Set up arguments. */
9467 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9468 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9469 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9470 new_st
->expr1
->where
= code
->loc
;
9471 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9472 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9473 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9474 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9475 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9476 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9477 new_st
->next
= body
->next
;
9479 if (default_case
->next
)
9481 new_st
->block
= gfc_get_code (EXEC_IF
);
9482 new_st
= new_st
->block
;
9483 new_st
->next
= default_case
->next
;
9486 /* Replace CLASS DEFAULT code by the IF chain. */
9487 default_case
->next
= if_st
;
9490 /* Resolve the internal code. This cannot be done earlier because
9491 it requires that the sym->assoc of selectors is set already. */
9492 gfc_current_ns
= ns
;
9493 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9494 gfc_current_ns
= old_ns
;
9501 /* Resolve a SELECT RANK statement. */
9504 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9507 gfc_code
*body
, *new_st
, *tail
;
9509 char tname
[GFC_MAX_SYMBOL_LEN
];
9510 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9512 gfc_expr
*selector_expr
= NULL
;
9514 HOST_WIDE_INT charlen
= 0;
9516 ns
= code
->ext
.block
.ns
;
9519 code
->op
= EXEC_BLOCK
;
9522 gfc_association_list
* assoc
;
9524 assoc
= gfc_get_association_list ();
9525 assoc
->st
= code
->expr1
->symtree
;
9526 assoc
->target
= gfc_copy_expr (code
->expr2
);
9527 assoc
->target
->where
= code
->expr2
->where
;
9528 /* assoc->variable will be set by resolve_assoc_var. */
9530 code
->ext
.block
.assoc
= assoc
;
9531 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9533 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9536 code
->ext
.block
.assoc
= NULL
;
9538 /* Loop over RANK cases. Note that returning on the errors causes a
9539 cascade of further errors because the case blocks do not compile
9541 for (body
= code
->block
; body
; body
= body
->block
)
9543 c
= body
->ext
.block
.case_list
;
9545 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9549 /* Check for repeated cases. */
9550 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9552 gfc_case
*d
= tail
->ext
.block
.case_list
;
9558 /* Check F2018: C1153. */
9559 if (!c
->low
&& !d
->low
)
9560 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9561 &c
->where
, &d
->where
);
9563 if (!c
->low
|| !d
->low
)
9566 /* Check F2018: C1153. */
9567 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9568 if ((case_value
== case_value2
) && case_value
== -1)
9569 gfc_error ("RANK (*) at %L is repeated at %L",
9570 &c
->where
, &d
->where
);
9571 else if (case_value
== case_value2
)
9572 gfc_error ("RANK (%i) at %L is repeated at %L",
9573 case_value
, &c
->where
, &d
->where
);
9579 /* Check F2018: C1155. */
9580 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9581 || gfc_expr_attr (code
->expr1
).pointer
))
9582 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9583 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9585 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9586 || gfc_expr_attr (code
->expr1
).pointer
))
9587 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9588 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9591 /* Add EXEC_SELECT to switch on rank. */
9592 new_st
= gfc_get_code (code
->op
);
9593 new_st
->expr1
= code
->expr1
;
9594 new_st
->expr2
= code
->expr2
;
9595 new_st
->block
= code
->block
;
9596 code
->expr1
= code
->expr2
= NULL
;
9601 ns
->code
->next
= new_st
;
9603 code
->op
= EXEC_SELECT_RANK
;
9605 selector_expr
= code
->expr1
;
9607 /* Loop over SELECT RANK cases. */
9608 for (body
= code
->block
; body
; body
= body
->block
)
9610 c
= body
->ext
.block
.case_list
;
9613 /* Pass on the default case. */
9617 /* Associate temporary to selector. This should only be done
9618 when this case is actually true, so build a new ASSOCIATE
9619 that does precisely this here (instead of using the
9621 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9622 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9623 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9625 if (c
->ts
.type
== BT_CLASS
)
9626 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9627 else if (c
->ts
.type
== BT_DERIVED
)
9628 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9629 else if (c
->ts
.type
!= BT_CHARACTER
)
9630 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9632 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9633 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9635 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9636 if (case_value
>= 0)
9637 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9639 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9641 st
= gfc_find_symtree (ns
->sym_root
, name
);
9642 gcc_assert (st
->n
.sym
->assoc
);
9644 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9645 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9647 new_st
= gfc_get_code (EXEC_BLOCK
);
9648 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9649 new_st
->ext
.block
.ns
->code
= body
->next
;
9650 body
->next
= new_st
;
9652 /* Chain in the new list only if it is marked as dangling. Otherwise
9653 there is a CASE label overlap and this is already used. Just ignore,
9654 the error is diagnosed elsewhere. */
9655 if (st
->n
.sym
->assoc
->dangling
)
9657 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9658 st
->n
.sym
->assoc
->dangling
= 0;
9661 resolve_assoc_var (st
->n
.sym
, false);
9664 gfc_current_ns
= ns
;
9665 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9666 gfc_current_ns
= old_ns
;
9670 /* Resolve a transfer statement. This is making sure that:
9671 -- a derived type being transferred has only non-pointer components
9672 -- a derived type being transferred doesn't have private components, unless
9673 it's being transferred from the module where the type was defined
9674 -- we're not trying to transfer a whole assumed size array. */
9677 resolve_transfer (gfc_code
*code
)
9679 gfc_symbol
*sym
, *derived
;
9683 bool formatted
= false;
9684 gfc_dt
*dt
= code
->ext
.dt
;
9685 gfc_symbol
*dtio_sub
= NULL
;
9689 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9690 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9691 exp
= exp
->value
.op
.op1
;
9693 if (exp
&& exp
->expr_type
== EXPR_NULL
9696 gfc_error ("Invalid context for NULL () intrinsic at %L",
9701 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9702 && exp
->expr_type
!= EXPR_FUNCTION
9703 && exp
->expr_type
!= EXPR_STRUCTURE
))
9706 /* If we are reading, the variable will be changed. Note that
9707 code->ext.dt may be NULL if the TRANSFER is related to
9708 an INQUIRE statement -- but in this case, we are not reading, either. */
9709 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9710 && !gfc_check_vardef_context (exp
, false, false, false,
9714 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9715 || exp
->expr_type
== EXPR_FUNCTION
9716 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9718 /* Go to actual component transferred. */
9719 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9720 if (ref
->type
== REF_COMPONENT
)
9721 ts
= &ref
->u
.c
.component
->ts
;
9723 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9724 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9726 derived
= ts
->u
.derived
;
9728 /* Determine when to use the formatted DTIO procedure. */
9729 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9732 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9733 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9734 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9736 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9739 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9740 /* Check to see if this is a nested DTIO call, with the
9741 dummy as the io-list object. */
9742 if (sym
&& sym
== dtio_sub
&& sym
->formal
9743 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9744 && exp
->ref
== NULL
)
9746 if (!sym
->attr
.recursive
)
9748 gfc_error ("DTIO %s procedure at %L must be recursive",
9749 sym
->name
, &sym
->declared_at
);
9756 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9758 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9759 "it is processed by a defined input/output procedure",
9764 if (ts
->type
== BT_DERIVED
)
9766 /* Check that transferred derived type doesn't contain POINTER
9767 components unless it is processed by a defined input/output
9769 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9771 gfc_error ("Data transfer element at %L cannot have POINTER "
9772 "components unless it is processed by a defined "
9773 "input/output procedure", &code
->loc
);
9778 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9780 gfc_error ("Data transfer element at %L cannot have "
9781 "procedure pointer components", &code
->loc
);
9785 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9787 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9788 "components unless it is processed by a defined "
9789 "input/output procedure", &code
->loc
);
9793 /* C_PTR and C_FUNPTR have private components which means they cannot
9794 be printed. However, if -std=gnu and not -pedantic, allow
9795 the component to be printed to help debugging. */
9796 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9798 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9799 "cannot have PRIVATE components", &code
->loc
))
9802 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9804 gfc_error ("Data transfer element at %L cannot have "
9805 "PRIVATE components unless it is processed by "
9806 "a defined input/output procedure", &code
->loc
);
9811 if (exp
->expr_type
== EXPR_STRUCTURE
)
9814 sym
= exp
->symtree
->n
.sym
;
9816 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9817 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9819 gfc_error ("Data transfer element at %L cannot be a full reference to "
9820 "an assumed-size array", &code
->loc
);
9824 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9825 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9829 /*********** Toplevel code resolution subroutines ***********/
9831 /* Find the set of labels that are reachable from this block. We also
9832 record the last statement in each block. */
9835 find_reachable_labels (gfc_code
*block
)
9842 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9844 /* Collect labels in this block. We don't keep those corresponding
9845 to END {IF|SELECT}, these are checked in resolve_branch by going
9846 up through the code_stack. */
9847 for (c
= block
; c
; c
= c
->next
)
9849 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9850 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9853 /* Merge with labels from parent block. */
9856 gcc_assert (cs_base
->prev
->reachable_labels
);
9857 bitmap_ior_into (cs_base
->reachable_labels
,
9858 cs_base
->prev
->reachable_labels
);
9864 resolve_lock_unlock_event (gfc_code
*code
)
9866 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9867 && code
->expr1
->value
.function
.isym
9868 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9869 remove_caf_get_intrinsic (code
->expr1
);
9871 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9872 && (code
->expr1
->ts
.type
!= BT_DERIVED
9873 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9874 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9875 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9876 || code
->expr1
->rank
!= 0
9877 || (!gfc_is_coarray (code
->expr1
) &&
9878 !gfc_is_coindexed (code
->expr1
))))
9879 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9880 &code
->expr1
->where
);
9881 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9882 && (code
->expr1
->ts
.type
!= BT_DERIVED
9883 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9884 || code
->expr1
->ts
.u
.derived
->from_intmod
9885 != INTMOD_ISO_FORTRAN_ENV
9886 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9887 != ISOFORTRAN_EVENT_TYPE
9888 || code
->expr1
->rank
!= 0))
9889 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9890 &code
->expr1
->where
);
9891 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9892 && !gfc_is_coindexed (code
->expr1
))
9893 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9894 &code
->expr1
->where
);
9895 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9896 gfc_error ("Event variable argument at %L must be a coarray but not "
9897 "coindexed", &code
->expr1
->where
);
9901 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9902 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9903 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9904 &code
->expr2
->where
);
9907 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9908 _("STAT variable")))
9913 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9914 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9915 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9916 &code
->expr3
->where
);
9919 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9920 _("ERRMSG variable")))
9923 /* Check for LOCK the ACQUIRED_LOCK. */
9924 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9925 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9926 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9927 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9928 "variable", &code
->expr4
->where
);
9930 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9931 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9932 _("ACQUIRED_LOCK variable")))
9935 /* Check for EVENT WAIT the UNTIL_COUNT. */
9936 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9938 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9939 || code
->expr4
->rank
!= 0)
9940 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9941 "expression", &code
->expr4
->where
);
9947 resolve_critical (gfc_code
*code
)
9949 gfc_symtree
*symtree
;
9950 gfc_symbol
*lock_type
;
9951 char name
[GFC_MAX_SYMBOL_LEN
];
9952 static int serial
= 0;
9954 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9957 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9958 GFC_PREFIX ("lock_type"));
9960 lock_type
= symtree
->n
.sym
;
9963 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9966 lock_type
= symtree
->n
.sym
;
9967 lock_type
->attr
.flavor
= FL_DERIVED
;
9968 lock_type
->attr
.zero_comp
= 1;
9969 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9970 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9973 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9974 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9977 code
->resolved_sym
= symtree
->n
.sym
;
9978 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9979 symtree
->n
.sym
->attr
.referenced
= 1;
9980 symtree
->n
.sym
->attr
.artificial
= 1;
9981 symtree
->n
.sym
->attr
.codimension
= 1;
9982 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9983 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9984 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9985 symtree
->n
.sym
->as
->corank
= 1;
9986 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9987 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9988 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9990 gfc_commit_symbols();
9995 resolve_sync (gfc_code
*code
)
9997 /* Check imageset. The * case matches expr1 == NULL. */
10000 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10001 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10002 "INTEGER expression", &code
->expr1
->where
);
10003 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10004 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10005 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10006 &code
->expr1
->where
);
10007 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10008 && gfc_simplify_expr (code
->expr1
, 0))
10010 gfc_constructor
*cons
;
10011 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10012 for (; cons
; cons
= gfc_constructor_next (cons
))
10013 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10014 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10015 gfc_error ("Imageset argument at %L must between 1 and "
10016 "num_images()", &cons
->expr
->where
);
10021 gfc_resolve_expr (code
->expr2
);
10023 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10024 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10025 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10026 &code
->expr2
->where
);
10028 /* Check ERRMSG. */
10029 gfc_resolve_expr (code
->expr3
);
10031 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10032 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10033 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10034 &code
->expr3
->where
);
10038 /* Given a branch to a label, see if the branch is conforming.
10039 The code node describes where the branch is located. */
10042 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10049 /* Step one: is this a valid branching target? */
10051 if (label
->defined
== ST_LABEL_UNKNOWN
)
10053 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10058 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10060 gfc_error ("Statement at %L is not a valid branch target statement "
10061 "for the branch statement at %L", &label
->where
, &code
->loc
);
10065 /* Step two: make sure this branch is not a branch to itself ;-) */
10067 if (code
->here
== label
)
10070 "Branch at %L may result in an infinite loop", &code
->loc
);
10074 /* Step three: See if the label is in the same block as the
10075 branching statement. The hard work has been done by setting up
10076 the bitmap reachable_labels. */
10078 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10080 /* Check now whether there is a CRITICAL construct; if so, check
10081 whether the label is still visible outside of the CRITICAL block,
10082 which is invalid. */
10083 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10085 if (stack
->current
->op
== EXEC_CRITICAL
10086 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10087 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10088 "label at %L", &code
->loc
, &label
->where
);
10089 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10090 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10091 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10092 "for label at %L", &code
->loc
, &label
->where
);
10098 /* Step four: If we haven't found the label in the bitmap, it may
10099 still be the label of the END of the enclosing block, in which
10100 case we find it by going up the code_stack. */
10102 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10104 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10106 if (stack
->current
->op
== EXEC_CRITICAL
)
10108 /* Note: A label at END CRITICAL does not leave the CRITICAL
10109 construct as END CRITICAL is still part of it. */
10110 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10111 " at %L", &code
->loc
, &label
->where
);
10114 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10116 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10117 "label at %L", &code
->loc
, &label
->where
);
10124 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10128 /* The label is not in an enclosing block, so illegal. This was
10129 allowed in Fortran 66, so we allow it as extension. No
10130 further checks are necessary in this case. */
10131 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10132 "as the GOTO statement at %L", &label
->where
,
10138 /* Check whether EXPR1 has the same shape as EXPR2. */
10141 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10143 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10144 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10145 bool result
= false;
10148 /* Compare the rank. */
10149 if (expr1
->rank
!= expr2
->rank
)
10152 /* Compare the size of each dimension. */
10153 for (i
=0; i
<expr1
->rank
; i
++)
10155 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10158 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10161 if (mpz_cmp (shape
[i
], shape2
[i
]))
10165 /* When either of the two expression is an assumed size array, we
10166 ignore the comparison of dimension sizes. */
10171 gfc_clear_shape (shape
, i
);
10172 gfc_clear_shape (shape2
, i
);
10177 /* Check whether a WHERE assignment target or a WHERE mask expression
10178 has the same shape as the outmost WHERE mask expression. */
10181 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10185 gfc_expr
*e
= NULL
;
10187 cblock
= code
->block
;
10189 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10190 In case of nested WHERE, only the outmost one is stored. */
10191 if (mask
== NULL
) /* outmost WHERE */
10193 else /* inner WHERE */
10200 /* Check if the mask-expr has a consistent shape with the
10201 outmost WHERE mask-expr. */
10202 if (!resolve_where_shape (cblock
->expr1
, e
))
10203 gfc_error ("WHERE mask at %L has inconsistent shape",
10204 &cblock
->expr1
->where
);
10207 /* the assignment statement of a WHERE statement, or the first
10208 statement in where-body-construct of a WHERE construct */
10209 cnext
= cblock
->next
;
10214 /* WHERE assignment statement */
10217 /* Check shape consistent for WHERE assignment target. */
10218 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10219 gfc_error ("WHERE assignment target at %L has "
10220 "inconsistent shape", &cnext
->expr1
->where
);
10224 case EXEC_ASSIGN_CALL
:
10225 resolve_call (cnext
);
10226 if (!cnext
->resolved_sym
->attr
.elemental
)
10227 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10228 &cnext
->ext
.actual
->expr
->where
);
10231 /* WHERE or WHERE construct is part of a where-body-construct */
10233 resolve_where (cnext
, e
);
10237 gfc_error ("Unsupported statement inside WHERE at %L",
10240 /* the next statement within the same where-body-construct */
10241 cnext
= cnext
->next
;
10243 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10244 cblock
= cblock
->block
;
10249 /* Resolve assignment in FORALL construct.
10250 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10251 FORALL index variables. */
10254 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10258 for (n
= 0; n
< nvar
; n
++)
10260 gfc_symbol
*forall_index
;
10262 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10264 /* Check whether the assignment target is one of the FORALL index
10266 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10267 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10268 gfc_error ("Assignment to a FORALL index variable at %L",
10269 &code
->expr1
->where
);
10272 /* If one of the FORALL index variables doesn't appear in the
10273 assignment variable, then there could be a many-to-one
10274 assignment. Emit a warning rather than an error because the
10275 mask could be resolving this problem. */
10276 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10277 gfc_warning (0, "The FORALL with index %qs is not used on the "
10278 "left side of the assignment at %L and so might "
10279 "cause multiple assignment to this object",
10280 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10286 /* Resolve WHERE statement in FORALL construct. */
10289 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10290 gfc_expr
**var_expr
)
10295 cblock
= code
->block
;
10298 /* the assignment statement of a WHERE statement, or the first
10299 statement in where-body-construct of a WHERE construct */
10300 cnext
= cblock
->next
;
10305 /* WHERE assignment statement */
10307 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10310 /* WHERE operator assignment statement */
10311 case EXEC_ASSIGN_CALL
:
10312 resolve_call (cnext
);
10313 if (!cnext
->resolved_sym
->attr
.elemental
)
10314 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10315 &cnext
->ext
.actual
->expr
->where
);
10318 /* WHERE or WHERE construct is part of a where-body-construct */
10320 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10324 gfc_error ("Unsupported statement inside WHERE at %L",
10327 /* the next statement within the same where-body-construct */
10328 cnext
= cnext
->next
;
10330 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10331 cblock
= cblock
->block
;
10336 /* Traverse the FORALL body to check whether the following errors exist:
10337 1. For assignment, check if a many-to-one assignment happens.
10338 2. For WHERE statement, check the WHERE body to see if there is any
10339 many-to-one assignment. */
10342 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10346 c
= code
->block
->next
;
10352 case EXEC_POINTER_ASSIGN
:
10353 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10356 case EXEC_ASSIGN_CALL
:
10360 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10361 there is no need to handle it here. */
10365 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10370 /* The next statement in the FORALL body. */
10376 /* Counts the number of iterators needed inside a forall construct, including
10377 nested forall constructs. This is used to allocate the needed memory
10378 in gfc_resolve_forall. */
10381 gfc_count_forall_iterators (gfc_code
*code
)
10383 int max_iters
, sub_iters
, current_iters
;
10384 gfc_forall_iterator
*fa
;
10386 gcc_assert(code
->op
== EXEC_FORALL
);
10390 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10393 code
= code
->block
->next
;
10397 if (code
->op
== EXEC_FORALL
)
10399 sub_iters
= gfc_count_forall_iterators (code
);
10400 if (sub_iters
> max_iters
)
10401 max_iters
= sub_iters
;
10406 return current_iters
+ max_iters
;
10410 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10411 gfc_resolve_forall_body to resolve the FORALL body. */
10414 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10416 static gfc_expr
**var_expr
;
10417 static int total_var
= 0;
10418 static int nvar
= 0;
10419 int i
, old_nvar
, tmp
;
10420 gfc_forall_iterator
*fa
;
10424 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10427 /* Start to resolve a FORALL construct */
10428 if (forall_save
== 0)
10430 /* Count the total number of FORALL indices in the nested FORALL
10431 construct in order to allocate the VAR_EXPR with proper size. */
10432 total_var
= gfc_count_forall_iterators (code
);
10434 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10435 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10438 /* The information about FORALL iterator, including FORALL indices start, end
10439 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10440 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10442 /* Fortran 20008: C738 (R753). */
10443 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10445 gfc_error ("FORALL index-name at %L must be a scalar variable "
10446 "of type integer", &fa
->var
->where
);
10450 /* Check if any outer FORALL index name is the same as the current
10452 for (i
= 0; i
< nvar
; i
++)
10454 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10455 gfc_error ("An outer FORALL construct already has an index "
10456 "with this name %L", &fa
->var
->where
);
10459 /* Record the current FORALL index. */
10460 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10464 /* No memory leak. */
10465 gcc_assert (nvar
<= total_var
);
10468 /* Resolve the FORALL body. */
10469 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10471 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10472 gfc_resolve_blocks (code
->block
, ns
);
10476 /* Free only the VAR_EXPRs allocated in this frame. */
10477 for (i
= nvar
; i
< tmp
; i
++)
10478 gfc_free_expr (var_expr
[i
]);
10482 /* We are in the outermost FORALL construct. */
10483 gcc_assert (forall_save
== 0);
10485 /* VAR_EXPR is not needed any more. */
10492 /* Resolve a BLOCK construct statement. */
10495 resolve_block_construct (gfc_code
* code
)
10497 /* Resolve the BLOCK's namespace. */
10498 gfc_resolve (code
->ext
.block
.ns
);
10500 /* For an ASSOCIATE block, the associations (and their targets) are already
10501 resolved during resolve_symbol. */
10505 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10509 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10513 for (; b
; b
= b
->block
)
10515 t
= gfc_resolve_expr (b
->expr1
);
10516 if (!gfc_resolve_expr (b
->expr2
))
10522 if (t
&& b
->expr1
!= NULL
10523 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10524 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10530 && b
->expr1
!= NULL
10531 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10532 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10537 resolve_branch (b
->label1
, b
);
10541 resolve_block_construct (b
);
10545 case EXEC_SELECT_TYPE
:
10546 case EXEC_SELECT_RANK
:
10549 case EXEC_DO_WHILE
:
10550 case EXEC_DO_CONCURRENT
:
10551 case EXEC_CRITICAL
:
10554 case EXEC_IOLENGTH
:
10558 case EXEC_OMP_ATOMIC
:
10559 case EXEC_OACC_ATOMIC
:
10561 gfc_omp_atomic_op aop
10562 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10564 /* Verify this before calling gfc_resolve_code, which might
10566 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10567 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10568 && b
->next
->next
== NULL
)
10569 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10570 && b
->next
->next
!= NULL
10571 && b
->next
->next
->op
== EXEC_ASSIGN
10572 && b
->next
->next
->next
== NULL
));
10576 case EXEC_OACC_PARALLEL_LOOP
:
10577 case EXEC_OACC_PARALLEL
:
10578 case EXEC_OACC_KERNELS_LOOP
:
10579 case EXEC_OACC_KERNELS
:
10580 case EXEC_OACC_DATA
:
10581 case EXEC_OACC_HOST_DATA
:
10582 case EXEC_OACC_LOOP
:
10583 case EXEC_OACC_UPDATE
:
10584 case EXEC_OACC_WAIT
:
10585 case EXEC_OACC_CACHE
:
10586 case EXEC_OACC_ENTER_DATA
:
10587 case EXEC_OACC_EXIT_DATA
:
10588 case EXEC_OACC_ROUTINE
:
10589 case EXEC_OMP_CRITICAL
:
10590 case EXEC_OMP_DISTRIBUTE
:
10591 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10592 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10593 case EXEC_OMP_DISTRIBUTE_SIMD
:
10595 case EXEC_OMP_DO_SIMD
:
10596 case EXEC_OMP_MASTER
:
10597 case EXEC_OMP_ORDERED
:
10598 case EXEC_OMP_PARALLEL
:
10599 case EXEC_OMP_PARALLEL_DO
:
10600 case EXEC_OMP_PARALLEL_DO_SIMD
:
10601 case EXEC_OMP_PARALLEL_SECTIONS
:
10602 case EXEC_OMP_PARALLEL_WORKSHARE
:
10603 case EXEC_OMP_SECTIONS
:
10604 case EXEC_OMP_SIMD
:
10605 case EXEC_OMP_SINGLE
:
10606 case EXEC_OMP_TARGET
:
10607 case EXEC_OMP_TARGET_DATA
:
10608 case EXEC_OMP_TARGET_ENTER_DATA
:
10609 case EXEC_OMP_TARGET_EXIT_DATA
:
10610 case EXEC_OMP_TARGET_PARALLEL
:
10611 case EXEC_OMP_TARGET_PARALLEL_DO
:
10612 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10613 case EXEC_OMP_TARGET_SIMD
:
10614 case EXEC_OMP_TARGET_TEAMS
:
10615 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10616 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10617 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10618 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10619 case EXEC_OMP_TARGET_UPDATE
:
10620 case EXEC_OMP_TASK
:
10621 case EXEC_OMP_TASKGROUP
:
10622 case EXEC_OMP_TASKLOOP
:
10623 case EXEC_OMP_TASKLOOP_SIMD
:
10624 case EXEC_OMP_TASKWAIT
:
10625 case EXEC_OMP_TASKYIELD
:
10626 case EXEC_OMP_TEAMS
:
10627 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10628 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10629 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10630 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10631 case EXEC_OMP_WORKSHARE
:
10635 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10638 gfc_resolve_code (b
->next
, ns
);
10643 /* Does everything to resolve an ordinary assignment. Returns true
10644 if this is an interface assignment. */
10646 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10653 symbol_attribute attr
;
10655 if (gfc_extend_assign (code
, ns
))
10659 if (code
->op
== EXEC_ASSIGN_CALL
)
10661 lhs
= code
->ext
.actual
->expr
;
10662 rhsptr
= &code
->ext
.actual
->next
->expr
;
10666 gfc_actual_arglist
* args
;
10667 gfc_typebound_proc
* tbp
;
10669 gcc_assert (code
->op
== EXEC_COMPCALL
);
10671 args
= code
->expr1
->value
.compcall
.actual
;
10673 rhsptr
= &args
->next
->expr
;
10675 tbp
= code
->expr1
->value
.compcall
.tbp
;
10676 gcc_assert (!tbp
->is_generic
);
10679 /* Make a temporary rhs when there is a default initializer
10680 and rhs is the same symbol as the lhs. */
10681 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10682 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10683 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10684 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10685 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10693 /* Handle the case of a BOZ literal on the RHS. */
10694 if (rhs
->ts
.type
== BT_BOZ
)
10696 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10697 "statement value nor an actual argument of "
10698 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10702 switch (lhs
->ts
.type
)
10705 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10709 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10713 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10718 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10720 HOST_WIDE_INT llen
= 0, rlen
= 0;
10721 if (lhs
->ts
.u
.cl
!= NULL
10722 && lhs
->ts
.u
.cl
->length
!= NULL
10723 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10724 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10726 if (rhs
->expr_type
== EXPR_CONSTANT
)
10727 rlen
= rhs
->value
.character
.length
;
10729 else if (rhs
->ts
.u
.cl
!= NULL
10730 && rhs
->ts
.u
.cl
->length
!= NULL
10731 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10732 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10734 if (rlen
&& llen
&& rlen
> llen
)
10735 gfc_warning_now (OPT_Wcharacter_truncation
,
10736 "CHARACTER expression will be truncated "
10737 "in assignment (%ld/%ld) at %L",
10738 (long) llen
, (long) rlen
, &code
->loc
);
10741 /* Ensure that a vector index expression for the lvalue is evaluated
10742 to a temporary if the lvalue symbol is referenced in it. */
10745 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10746 if (ref
->type
== REF_ARRAY
)
10748 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10749 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10750 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10751 ref
->u
.ar
.start
[n
]))
10753 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10757 if (gfc_pure (NULL
))
10759 if (lhs
->ts
.type
== BT_DERIVED
10760 && lhs
->expr_type
== EXPR_VARIABLE
10761 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10762 && rhs
->expr_type
== EXPR_VARIABLE
10763 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10764 || gfc_is_coindexed (rhs
)))
10766 /* F2008, C1283. */
10767 if (gfc_is_coindexed (rhs
))
10768 gfc_error ("Coindexed expression at %L is assigned to "
10769 "a derived type variable with a POINTER "
10770 "component in a PURE procedure",
10773 gfc_error ("The impure variable at %L is assigned to "
10774 "a derived type variable with a POINTER "
10775 "component in a PURE procedure (12.6)",
10780 /* Fortran 2008, C1283. */
10781 if (gfc_is_coindexed (lhs
))
10783 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10784 "procedure", &rhs
->where
);
10789 if (gfc_implicit_pure (NULL
))
10791 if (lhs
->expr_type
== EXPR_VARIABLE
10792 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10793 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10794 gfc_unset_implicit_pure (NULL
);
10796 if (lhs
->ts
.type
== BT_DERIVED
10797 && lhs
->expr_type
== EXPR_VARIABLE
10798 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10799 && rhs
->expr_type
== EXPR_VARIABLE
10800 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10801 || gfc_is_coindexed (rhs
)))
10802 gfc_unset_implicit_pure (NULL
);
10804 /* Fortran 2008, C1283. */
10805 if (gfc_is_coindexed (lhs
))
10806 gfc_unset_implicit_pure (NULL
);
10809 /* F2008, 7.2.1.2. */
10810 attr
= gfc_expr_attr (lhs
);
10811 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10813 if (attr
.codimension
)
10815 gfc_error ("Assignment to polymorphic coarray at %L is not "
10816 "permitted", &lhs
->where
);
10819 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10820 "polymorphic variable at %L", &lhs
->where
))
10822 if (!flag_realloc_lhs
)
10824 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10825 "requires %<-frealloc-lhs%>", &lhs
->where
);
10829 else if (lhs
->ts
.type
== BT_CLASS
)
10831 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10832 "assignment at %L - check that there is a matching specific "
10833 "subroutine for '=' operator", &lhs
->where
);
10837 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10839 /* F2008, Section 7.2.1.2. */
10840 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10842 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10843 "component in assignment at %L", &lhs
->where
);
10847 /* Assign the 'data' of a class object to a derived type. */
10848 if (lhs
->ts
.type
== BT_DERIVED
10849 && rhs
->ts
.type
== BT_CLASS
10850 && rhs
->expr_type
!= EXPR_ARRAY
)
10851 gfc_add_data_component (rhs
);
10853 /* Make sure there is a vtable and, in particular, a _copy for the
10855 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10856 gfc_find_vtab (&rhs
->ts
);
10858 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10860 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10861 && code
->expr2
->value
.function
.isym
10862 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10863 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10864 && !gfc_expr_attr (rhs
).allocatable
10865 && !gfc_has_vector_subscript (rhs
)));
10867 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10869 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10870 Additionally, insert this code when the RHS is a CAF as we then use the
10871 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10872 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10873 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10875 if (caf_convert_to_send
)
10877 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10878 && code
->expr2
->value
.function
.isym
10879 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10880 remove_caf_get_intrinsic (code
->expr2
);
10881 code
->op
= EXEC_CALL
;
10882 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10883 code
->resolved_sym
= code
->symtree
->n
.sym
;
10884 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10885 code
->resolved_sym
->attr
.intrinsic
= 1;
10886 code
->resolved_sym
->attr
.subroutine
= 1;
10887 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10888 gfc_commit_symbol (code
->resolved_sym
);
10889 code
->ext
.actual
= gfc_get_actual_arglist ();
10890 code
->ext
.actual
->expr
= lhs
;
10891 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10892 code
->ext
.actual
->next
->expr
= rhs
;
10893 code
->expr1
= NULL
;
10894 code
->expr2
= NULL
;
10901 /* Add a component reference onto an expression. */
10904 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10909 ref
= &((*ref
)->next
);
10910 *ref
= gfc_get_ref ();
10911 (*ref
)->type
= REF_COMPONENT
;
10912 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10913 (*ref
)->u
.c
.component
= c
;
10916 /* Add a full array ref, as necessary. */
10919 gfc_add_full_array_ref (e
, c
->as
);
10920 e
->rank
= c
->as
->rank
;
10925 /* Build an assignment. Keep the argument 'op' for future use, so that
10926 pointer assignments can be made. */
10929 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10930 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10932 gfc_code
*this_code
;
10934 this_code
= gfc_get_code (op
);
10935 this_code
->next
= NULL
;
10936 this_code
->expr1
= gfc_copy_expr (expr1
);
10937 this_code
->expr2
= gfc_copy_expr (expr2
);
10938 this_code
->loc
= loc
;
10939 if (comp1
&& comp2
)
10941 add_comp_ref (this_code
->expr1
, comp1
);
10942 add_comp_ref (this_code
->expr2
, comp2
);
10949 /* Makes a temporary variable expression based on the characteristics of
10950 a given variable expression. */
10953 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10955 static int serial
= 0;
10956 char name
[GFC_MAX_SYMBOL_LEN
];
10958 gfc_array_spec
*as
;
10959 gfc_array_ref
*aref
;
10962 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10963 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10964 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10966 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10967 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10969 e
->value
.character
.length
);
10975 /* Obtain the arrayspec for the temporary. */
10976 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10977 && e
->expr_type
!= EXPR_FUNCTION
10978 && e
->expr_type
!= EXPR_OP
)
10980 aref
= gfc_find_array_ref (e
);
10981 if (e
->expr_type
== EXPR_VARIABLE
10982 && e
->symtree
->n
.sym
->as
== aref
->as
)
10986 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10987 if (ref
->type
== REF_COMPONENT
10988 && ref
->u
.c
.component
->as
== aref
->as
)
10996 /* Add the attributes and the arrayspec to the temporary. */
10997 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10998 tmp
->n
.sym
->attr
.function
= 0;
10999 tmp
->n
.sym
->attr
.result
= 0;
11000 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11001 tmp
->n
.sym
->attr
.dummy
= 0;
11002 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11006 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11009 if (as
->type
== AS_DEFERRED
)
11010 tmp
->n
.sym
->attr
.allocatable
= 1;
11012 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11013 || e
->expr_type
== EXPR_FUNCTION
11014 || e
->expr_type
== EXPR_OP
))
11016 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11017 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11018 tmp
->n
.sym
->as
->rank
= e
->rank
;
11019 tmp
->n
.sym
->attr
.allocatable
= 1;
11020 tmp
->n
.sym
->attr
.dimension
= 1;
11023 tmp
->n
.sym
->attr
.dimension
= 0;
11025 gfc_set_sym_referenced (tmp
->n
.sym
);
11026 gfc_commit_symbol (tmp
->n
.sym
);
11027 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11029 /* Should the lhs be a section, use its array ref for the
11030 temporary expression. */
11031 if (aref
&& aref
->type
!= AR_FULL
)
11033 gfc_free_ref_list (e
->ref
);
11034 e
->ref
= gfc_copy_ref (ref
);
11040 /* Add one line of code to the code chain, making sure that 'head' and
11041 'tail' are appropriately updated. */
11044 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11046 gcc_assert (this_code
);
11048 *head
= *tail
= *this_code
;
11050 *tail
= gfc_append_code (*tail
, *this_code
);
11055 /* Counts the potential number of part array references that would
11056 result from resolution of typebound defined assignments. */
11059 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11062 int c_depth
= 0, t_depth
;
11064 for (c
= derived
->components
; c
; c
= c
->next
)
11066 if ((!gfc_bt_struct (c
->ts
.type
)
11068 || c
->attr
.allocatable
11069 || c
->attr
.proc_pointer_comp
11070 || c
->attr
.class_pointer
11071 || c
->attr
.proc_pointer
)
11072 && !c
->attr
.defined_assign_comp
)
11075 if (c
->as
&& c_depth
== 0)
11078 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11079 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11084 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11086 return depth
+ c_depth
;
11090 /* Implement 7.2.1.3 of the F08 standard:
11091 "An intrinsic assignment where the variable is of derived type is
11092 performed as if each component of the variable were assigned from the
11093 corresponding component of expr using pointer assignment (7.2.2) for
11094 each pointer component, defined assignment for each nonpointer
11095 nonallocatable component of a type that has a type-bound defined
11096 assignment consistent with the component, intrinsic assignment for
11097 each other nonpointer nonallocatable component, ..."
11099 The pointer assignments are taken care of by the intrinsic
11100 assignment of the structure itself. This function recursively adds
11101 defined assignments where required. The recursion is accomplished
11102 by calling gfc_resolve_code.
11104 When the lhs in a defined assignment has intent INOUT, we need a
11105 temporary for the lhs. In pseudo-code:
11107 ! Only call function lhs once.
11108 if (lhs is not a constant or an variable)
11111 ! Do the intrinsic assignment
11113 ! Now do the defined assignments
11114 do over components with typebound defined assignment [%cmp]
11115 #if one component's assignment procedure is INOUT
11117 #if expr2 non-variable
11123 t1%cmp {defined=} expr2%cmp
11129 expr1%cmp {defined=} expr2%cmp
11133 /* The temporary assignments have to be put on top of the additional
11134 code to avoid the result being changed by the intrinsic assignment.
11136 static int component_assignment_level
= 0;
11137 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11140 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11142 gfc_component
*comp1
, *comp2
;
11143 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11145 int error_count
, depth
;
11147 gfc_get_errors (NULL
, &error_count
);
11149 /* Filter out continuing processing after an error. */
11151 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11152 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11155 /* TODO: Handle more than one part array reference in assignments. */
11156 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11157 (*code
)->expr1
->rank
? 1 : 0);
11160 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11161 "done because multiple part array references would "
11162 "occur in intermediate expressions.", &(*code
)->loc
);
11166 component_assignment_level
++;
11168 /* Create a temporary so that functions get called only once. */
11169 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11170 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11172 gfc_expr
*tmp_expr
;
11174 /* Assign the rhs to the temporary. */
11175 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11176 this_code
= build_assignment (EXEC_ASSIGN
,
11177 tmp_expr
, (*code
)->expr2
,
11178 NULL
, NULL
, (*code
)->loc
);
11179 /* Add the code and substitute the rhs expression. */
11180 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11181 gfc_free_expr ((*code
)->expr2
);
11182 (*code
)->expr2
= tmp_expr
;
11185 /* Do the intrinsic assignment. This is not needed if the lhs is one
11186 of the temporaries generated here, since the intrinsic assignment
11187 to the final result already does this. */
11188 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11190 this_code
= build_assignment (EXEC_ASSIGN
,
11191 (*code
)->expr1
, (*code
)->expr2
,
11192 NULL
, NULL
, (*code
)->loc
);
11193 add_code_to_chain (&this_code
, &head
, &tail
);
11196 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11197 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11200 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11202 bool inout
= false;
11204 /* The intrinsic assignment does the right thing for pointers
11205 of all kinds and allocatable components. */
11206 if (!gfc_bt_struct (comp1
->ts
.type
)
11207 || comp1
->attr
.pointer
11208 || comp1
->attr
.allocatable
11209 || comp1
->attr
.proc_pointer_comp
11210 || comp1
->attr
.class_pointer
11211 || comp1
->attr
.proc_pointer
)
11214 /* Make an assigment for this component. */
11215 this_code
= build_assignment (EXEC_ASSIGN
,
11216 (*code
)->expr1
, (*code
)->expr2
,
11217 comp1
, comp2
, (*code
)->loc
);
11219 /* Convert the assignment if there is a defined assignment for
11220 this type. Otherwise, using the call from gfc_resolve_code,
11221 recurse into its components. */
11222 gfc_resolve_code (this_code
, ns
);
11224 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11226 gfc_formal_arglist
*dummy_args
;
11228 /* Check that there is a typebound defined assignment. If not,
11229 then this must be a module defined assignment. We cannot
11230 use the defined_assign_comp attribute here because it must
11231 be this derived type that has the defined assignment and not
11233 if (!(comp1
->ts
.u
.derived
->f2k_derived
11234 && comp1
->ts
.u
.derived
->f2k_derived
11235 ->tb_op
[INTRINSIC_ASSIGN
]))
11237 gfc_free_statements (this_code
);
11242 /* If the first argument of the subroutine has intent INOUT
11243 a temporary must be generated and used instead. */
11244 rsym
= this_code
->resolved_sym
;
11245 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11247 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11249 gfc_code
*temp_code
;
11252 /* Build the temporary required for the assignment and put
11253 it at the head of the generated code. */
11256 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11257 temp_code
= build_assignment (EXEC_ASSIGN
,
11258 t1
, (*code
)->expr1
,
11259 NULL
, NULL
, (*code
)->loc
);
11261 /* For allocatable LHS, check whether it is allocated. Note
11262 that allocatable components with defined assignment are
11263 not yet support. See PR 57696. */
11264 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11268 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11269 block
= gfc_get_code (EXEC_IF
);
11270 block
->block
= gfc_get_code (EXEC_IF
);
11271 block
->block
->expr1
11272 = gfc_build_intrinsic_call (ns
,
11273 GFC_ISYM_ALLOCATED
, "allocated",
11274 (*code
)->loc
, 1, e
);
11275 block
->block
->next
= temp_code
;
11278 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11281 /* Replace the first actual arg with the component of the
11283 gfc_free_expr (this_code
->ext
.actual
->expr
);
11284 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11285 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11287 /* If the LHS variable is allocatable and wasn't allocated and
11288 the temporary is allocatable, pointer assign the address of
11289 the freshly allocated LHS to the temporary. */
11290 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11291 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11296 cond
= gfc_get_expr ();
11297 cond
->ts
.type
= BT_LOGICAL
;
11298 cond
->ts
.kind
= gfc_default_logical_kind
;
11299 cond
->expr_type
= EXPR_OP
;
11300 cond
->where
= (*code
)->loc
;
11301 cond
->value
.op
.op
= INTRINSIC_NOT
;
11302 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11303 GFC_ISYM_ALLOCATED
, "allocated",
11304 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11305 block
= gfc_get_code (EXEC_IF
);
11306 block
->block
= gfc_get_code (EXEC_IF
);
11307 block
->block
->expr1
= cond
;
11308 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11309 t1
, (*code
)->expr1
,
11310 NULL
, NULL
, (*code
)->loc
);
11311 add_code_to_chain (&block
, &head
, &tail
);
11315 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11317 /* Don't add intrinsic assignments since they are already
11318 effected by the intrinsic assignment of the structure. */
11319 gfc_free_statements (this_code
);
11324 add_code_to_chain (&this_code
, &head
, &tail
);
11328 /* Transfer the value to the final result. */
11329 this_code
= build_assignment (EXEC_ASSIGN
,
11330 (*code
)->expr1
, t1
,
11331 comp1
, comp2
, (*code
)->loc
);
11332 add_code_to_chain (&this_code
, &head
, &tail
);
11336 /* Put the temporary assignments at the top of the generated code. */
11337 if (tmp_head
&& component_assignment_level
== 1)
11339 gfc_append_code (tmp_head
, head
);
11341 tmp_head
= tmp_tail
= NULL
;
11344 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11345 // not accidentally deallocated. Hence, nullify t1.
11346 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11347 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11353 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11354 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11355 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11356 block
= gfc_get_code (EXEC_IF
);
11357 block
->block
= gfc_get_code (EXEC_IF
);
11358 block
->block
->expr1
= cond
;
11359 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11360 t1
, gfc_get_null_expr (&(*code
)->loc
),
11361 NULL
, NULL
, (*code
)->loc
);
11362 gfc_append_code (tail
, block
);
11366 /* Now attach the remaining code chain to the input code. Step on
11367 to the end of the new code since resolution is complete. */
11368 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11369 tail
->next
= (*code
)->next
;
11370 /* Overwrite 'code' because this would place the intrinsic assignment
11371 before the temporary for the lhs is created. */
11372 gfc_free_expr ((*code
)->expr1
);
11373 gfc_free_expr ((*code
)->expr2
);
11379 component_assignment_level
--;
11383 /* F2008: Pointer function assignments are of the form:
11384 ptr_fcn (args) = expr
11385 This function breaks these assignments into two statements:
11386 temporary_pointer => ptr_fcn(args)
11387 temporary_pointer = expr */
11390 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11392 gfc_expr
*tmp_ptr_expr
;
11393 gfc_code
*this_code
;
11394 gfc_component
*comp
;
11397 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11400 /* Even if standard does not support this feature, continue to build
11401 the two statements to avoid upsetting frontend_passes.c. */
11402 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11403 "%L", &(*code
)->loc
);
11405 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11408 s
= comp
->ts
.interface
;
11410 s
= (*code
)->expr1
->symtree
->n
.sym
;
11412 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11414 gfc_error ("The function result on the lhs of the assignment at "
11415 "%L must have the pointer attribute.",
11416 &(*code
)->expr1
->where
);
11417 (*code
)->op
= EXEC_NOP
;
11421 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11423 /* get_temp_from_expression is set up for ordinary assignments. To that
11424 end, where array bounds are not known, arrays are made allocatable.
11425 Change the temporary to a pointer here. */
11426 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11427 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11428 tmp_ptr_expr
->where
= (*code
)->loc
;
11430 this_code
= build_assignment (EXEC_ASSIGN
,
11431 tmp_ptr_expr
, (*code
)->expr2
,
11432 NULL
, NULL
, (*code
)->loc
);
11433 this_code
->next
= (*code
)->next
;
11434 (*code
)->next
= this_code
;
11435 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11436 (*code
)->expr2
= (*code
)->expr1
;
11437 (*code
)->expr1
= tmp_ptr_expr
;
11443 /* Deferred character length assignments from an operator expression
11444 require a temporary because the character length of the lhs can
11445 change in the course of the assignment. */
11448 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11450 gfc_expr
*tmp_expr
;
11451 gfc_code
*this_code
;
11453 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11454 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11455 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11458 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11461 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11464 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11465 tmp_expr
->where
= (*code
)->loc
;
11467 /* A new charlen is required to ensure that the variable string
11468 length is different to that of the original lhs. */
11469 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11470 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11471 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11472 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11474 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11476 this_code
= build_assignment (EXEC_ASSIGN
,
11478 gfc_copy_expr (tmp_expr
),
11479 NULL
, NULL
, (*code
)->loc
);
11481 (*code
)->expr1
= tmp_expr
;
11483 this_code
->next
= (*code
)->next
;
11484 (*code
)->next
= this_code
;
11490 /* Given a block of code, recursively resolve everything pointed to by this
11494 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11496 int omp_workshare_save
;
11497 int forall_save
, do_concurrent_save
;
11501 frame
.prev
= cs_base
;
11505 find_reachable_labels (code
);
11507 for (; code
; code
= code
->next
)
11509 frame
.current
= code
;
11510 forall_save
= forall_flag
;
11511 do_concurrent_save
= gfc_do_concurrent_flag
;
11513 if (code
->op
== EXEC_FORALL
)
11516 gfc_resolve_forall (code
, ns
, forall_save
);
11519 else if (code
->block
)
11521 omp_workshare_save
= -1;
11524 case EXEC_OACC_PARALLEL_LOOP
:
11525 case EXEC_OACC_PARALLEL
:
11526 case EXEC_OACC_KERNELS_LOOP
:
11527 case EXEC_OACC_KERNELS
:
11528 case EXEC_OACC_DATA
:
11529 case EXEC_OACC_HOST_DATA
:
11530 case EXEC_OACC_LOOP
:
11531 gfc_resolve_oacc_blocks (code
, ns
);
11533 case EXEC_OMP_PARALLEL_WORKSHARE
:
11534 omp_workshare_save
= omp_workshare_flag
;
11535 omp_workshare_flag
= 1;
11536 gfc_resolve_omp_parallel_blocks (code
, ns
);
11538 case EXEC_OMP_PARALLEL
:
11539 case EXEC_OMP_PARALLEL_DO
:
11540 case EXEC_OMP_PARALLEL_DO_SIMD
:
11541 case EXEC_OMP_PARALLEL_SECTIONS
:
11542 case EXEC_OMP_TARGET_PARALLEL
:
11543 case EXEC_OMP_TARGET_PARALLEL_DO
:
11544 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11545 case EXEC_OMP_TARGET_TEAMS
:
11546 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11547 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11548 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11549 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11550 case EXEC_OMP_TASK
:
11551 case EXEC_OMP_TASKLOOP
:
11552 case EXEC_OMP_TASKLOOP_SIMD
:
11553 case EXEC_OMP_TEAMS
:
11554 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11555 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11556 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11557 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11558 omp_workshare_save
= omp_workshare_flag
;
11559 omp_workshare_flag
= 0;
11560 gfc_resolve_omp_parallel_blocks (code
, ns
);
11562 case EXEC_OMP_DISTRIBUTE
:
11563 case EXEC_OMP_DISTRIBUTE_SIMD
:
11565 case EXEC_OMP_DO_SIMD
:
11566 case EXEC_OMP_SIMD
:
11567 case EXEC_OMP_TARGET_SIMD
:
11568 gfc_resolve_omp_do_blocks (code
, ns
);
11570 case EXEC_SELECT_TYPE
:
11571 /* Blocks are handled in resolve_select_type because we have
11572 to transform the SELECT TYPE into ASSOCIATE first. */
11574 case EXEC_DO_CONCURRENT
:
11575 gfc_do_concurrent_flag
= 1;
11576 gfc_resolve_blocks (code
->block
, ns
);
11577 gfc_do_concurrent_flag
= 2;
11579 case EXEC_OMP_WORKSHARE
:
11580 omp_workshare_save
= omp_workshare_flag
;
11581 omp_workshare_flag
= 1;
11584 gfc_resolve_blocks (code
->block
, ns
);
11588 if (omp_workshare_save
!= -1)
11589 omp_workshare_flag
= omp_workshare_save
;
11593 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11594 t
= gfc_resolve_expr (code
->expr1
);
11595 forall_flag
= forall_save
;
11596 gfc_do_concurrent_flag
= do_concurrent_save
;
11598 if (!gfc_resolve_expr (code
->expr2
))
11601 if (code
->op
== EXEC_ALLOCATE
11602 && !gfc_resolve_expr (code
->expr3
))
11608 case EXEC_END_BLOCK
:
11609 case EXEC_END_NESTED_BLOCK
:
11613 case EXEC_ERROR_STOP
:
11615 case EXEC_CONTINUE
:
11617 case EXEC_ASSIGN_CALL
:
11620 case EXEC_CRITICAL
:
11621 resolve_critical (code
);
11624 case EXEC_SYNC_ALL
:
11625 case EXEC_SYNC_IMAGES
:
11626 case EXEC_SYNC_MEMORY
:
11627 resolve_sync (code
);
11632 case EXEC_EVENT_POST
:
11633 case EXEC_EVENT_WAIT
:
11634 resolve_lock_unlock_event (code
);
11637 case EXEC_FAIL_IMAGE
:
11638 case EXEC_FORM_TEAM
:
11639 case EXEC_CHANGE_TEAM
:
11640 case EXEC_END_TEAM
:
11641 case EXEC_SYNC_TEAM
:
11645 /* Keep track of which entry we are up to. */
11646 current_entry_id
= code
->ext
.entry
->id
;
11650 resolve_where (code
, NULL
);
11654 if (code
->expr1
!= NULL
)
11656 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11657 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11658 "INTEGER variable", &code
->expr1
->where
);
11659 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11660 gfc_error ("Variable %qs has not been assigned a target "
11661 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11662 &code
->expr1
->where
);
11665 resolve_branch (code
->label1
, code
);
11669 if (code
->expr1
!= NULL
11670 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11671 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11672 "INTEGER return specifier", &code
->expr1
->where
);
11675 case EXEC_INIT_ASSIGN
:
11676 case EXEC_END_PROCEDURE
:
11683 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11685 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11686 && code
->expr1
->value
.function
.isym
11687 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11688 remove_caf_get_intrinsic (code
->expr1
);
11690 /* If this is a pointer function in an lvalue variable context,
11691 the new code will have to be resolved afresh. This is also the
11692 case with an error, where the code is transformed into NOP to
11693 prevent ICEs downstream. */
11694 if (resolve_ptr_fcn_assign (&code
, ns
)
11695 || code
->op
== EXEC_NOP
)
11698 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11702 if (resolve_ordinary_assign (code
, ns
))
11704 if (code
->op
== EXEC_COMPCALL
)
11710 /* Check for dependencies in deferred character length array
11711 assignments and generate a temporary, if necessary. */
11712 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11715 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11716 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11717 && code
->expr1
->ts
.u
.derived
11718 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11719 generate_component_assignments (&code
, ns
);
11723 case EXEC_LABEL_ASSIGN
:
11724 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11725 gfc_error ("Label %d referenced at %L is never defined",
11726 code
->label1
->value
, &code
->label1
->where
);
11728 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11729 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11730 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11731 != gfc_default_integer_kind
11732 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11733 gfc_error ("ASSIGN statement at %L requires a scalar "
11734 "default INTEGER variable", &code
->expr1
->where
);
11737 case EXEC_POINTER_ASSIGN
:
11744 /* This is both a variable definition and pointer assignment
11745 context, so check both of them. For rank remapping, a final
11746 array ref may be present on the LHS and fool gfc_expr_attr
11747 used in gfc_check_vardef_context. Remove it. */
11748 e
= remove_last_array_ref (code
->expr1
);
11749 t
= gfc_check_vardef_context (e
, true, false, false,
11750 _("pointer assignment"));
11752 t
= gfc_check_vardef_context (e
, false, false, false,
11753 _("pointer assignment"));
11756 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11761 /* Assigning a class object always is a regular assign. */
11762 if (code
->expr2
->ts
.type
== BT_CLASS
11763 && code
->expr1
->ts
.type
== BT_CLASS
11764 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11765 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11766 && code
->expr2
->expr_type
== EXPR_VARIABLE
11767 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11769 code
->op
= EXEC_ASSIGN
;
11773 case EXEC_ARITHMETIC_IF
:
11775 gfc_expr
*e
= code
->expr1
;
11777 gfc_resolve_expr (e
);
11778 if (e
->expr_type
== EXPR_NULL
)
11779 gfc_error ("Invalid NULL at %L", &e
->where
);
11781 if (t
&& (e
->rank
> 0
11782 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11783 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11784 "REAL or INTEGER expression", &e
->where
);
11786 resolve_branch (code
->label1
, code
);
11787 resolve_branch (code
->label2
, code
);
11788 resolve_branch (code
->label3
, code
);
11793 if (t
&& code
->expr1
!= NULL
11794 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11795 || code
->expr1
->rank
!= 0))
11796 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11797 &code
->expr1
->where
);
11802 resolve_call (code
);
11805 case EXEC_COMPCALL
:
11807 resolve_typebound_subroutine (code
);
11810 case EXEC_CALL_PPC
:
11811 resolve_ppc_call (code
);
11815 /* Select is complicated. Also, a SELECT construct could be
11816 a transformed computed GOTO. */
11817 resolve_select (code
, false);
11820 case EXEC_SELECT_TYPE
:
11821 resolve_select_type (code
, ns
);
11824 case EXEC_SELECT_RANK
:
11825 resolve_select_rank (code
, ns
);
11829 resolve_block_construct (code
);
11833 if (code
->ext
.iterator
!= NULL
)
11835 gfc_iterator
*iter
= code
->ext
.iterator
;
11836 if (gfc_resolve_iterator (iter
, true, false))
11837 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11842 case EXEC_DO_WHILE
:
11843 if (code
->expr1
== NULL
)
11844 gfc_internal_error ("gfc_resolve_code(): No expression on "
11847 && (code
->expr1
->rank
!= 0
11848 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11849 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11850 "a scalar LOGICAL expression", &code
->expr1
->where
);
11853 case EXEC_ALLOCATE
:
11855 resolve_allocate_deallocate (code
, "ALLOCATE");
11859 case EXEC_DEALLOCATE
:
11861 resolve_allocate_deallocate (code
, "DEALLOCATE");
11866 if (!gfc_resolve_open (code
->ext
.open
))
11869 resolve_branch (code
->ext
.open
->err
, code
);
11873 if (!gfc_resolve_close (code
->ext
.close
))
11876 resolve_branch (code
->ext
.close
->err
, code
);
11879 case EXEC_BACKSPACE
:
11883 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11886 resolve_branch (code
->ext
.filepos
->err
, code
);
11890 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11893 resolve_branch (code
->ext
.inquire
->err
, code
);
11896 case EXEC_IOLENGTH
:
11897 gcc_assert (code
->ext
.inquire
!= NULL
);
11898 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11901 resolve_branch (code
->ext
.inquire
->err
, code
);
11905 if (!gfc_resolve_wait (code
->ext
.wait
))
11908 resolve_branch (code
->ext
.wait
->err
, code
);
11909 resolve_branch (code
->ext
.wait
->end
, code
);
11910 resolve_branch (code
->ext
.wait
->eor
, code
);
11915 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11918 resolve_branch (code
->ext
.dt
->err
, code
);
11919 resolve_branch (code
->ext
.dt
->end
, code
);
11920 resolve_branch (code
->ext
.dt
->eor
, code
);
11923 case EXEC_TRANSFER
:
11924 resolve_transfer (code
);
11927 case EXEC_DO_CONCURRENT
:
11929 resolve_forall_iterators (code
->ext
.forall_iterator
);
11931 if (code
->expr1
!= NULL
11932 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11933 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11934 "expression", &code
->expr1
->where
);
11937 case EXEC_OACC_PARALLEL_LOOP
:
11938 case EXEC_OACC_PARALLEL
:
11939 case EXEC_OACC_KERNELS_LOOP
:
11940 case EXEC_OACC_KERNELS
:
11941 case EXEC_OACC_DATA
:
11942 case EXEC_OACC_HOST_DATA
:
11943 case EXEC_OACC_LOOP
:
11944 case EXEC_OACC_UPDATE
:
11945 case EXEC_OACC_WAIT
:
11946 case EXEC_OACC_CACHE
:
11947 case EXEC_OACC_ENTER_DATA
:
11948 case EXEC_OACC_EXIT_DATA
:
11949 case EXEC_OACC_ATOMIC
:
11950 case EXEC_OACC_DECLARE
:
11951 gfc_resolve_oacc_directive (code
, ns
);
11954 case EXEC_OMP_ATOMIC
:
11955 case EXEC_OMP_BARRIER
:
11956 case EXEC_OMP_CANCEL
:
11957 case EXEC_OMP_CANCELLATION_POINT
:
11958 case EXEC_OMP_CRITICAL
:
11959 case EXEC_OMP_FLUSH
:
11960 case EXEC_OMP_DISTRIBUTE
:
11961 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11962 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11963 case EXEC_OMP_DISTRIBUTE_SIMD
:
11965 case EXEC_OMP_DO_SIMD
:
11966 case EXEC_OMP_MASTER
:
11967 case EXEC_OMP_ORDERED
:
11968 case EXEC_OMP_SECTIONS
:
11969 case EXEC_OMP_SIMD
:
11970 case EXEC_OMP_SINGLE
:
11971 case EXEC_OMP_TARGET
:
11972 case EXEC_OMP_TARGET_DATA
:
11973 case EXEC_OMP_TARGET_ENTER_DATA
:
11974 case EXEC_OMP_TARGET_EXIT_DATA
:
11975 case EXEC_OMP_TARGET_PARALLEL
:
11976 case EXEC_OMP_TARGET_PARALLEL_DO
:
11977 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11978 case EXEC_OMP_TARGET_SIMD
:
11979 case EXEC_OMP_TARGET_TEAMS
:
11980 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11981 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11982 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11983 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11984 case EXEC_OMP_TARGET_UPDATE
:
11985 case EXEC_OMP_TASK
:
11986 case EXEC_OMP_TASKGROUP
:
11987 case EXEC_OMP_TASKLOOP
:
11988 case EXEC_OMP_TASKLOOP_SIMD
:
11989 case EXEC_OMP_TASKWAIT
:
11990 case EXEC_OMP_TASKYIELD
:
11991 case EXEC_OMP_TEAMS
:
11992 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11993 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11994 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11995 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11996 case EXEC_OMP_WORKSHARE
:
11997 gfc_resolve_omp_directive (code
, ns
);
12000 case EXEC_OMP_PARALLEL
:
12001 case EXEC_OMP_PARALLEL_DO
:
12002 case EXEC_OMP_PARALLEL_DO_SIMD
:
12003 case EXEC_OMP_PARALLEL_SECTIONS
:
12004 case EXEC_OMP_PARALLEL_WORKSHARE
:
12005 omp_workshare_save
= omp_workshare_flag
;
12006 omp_workshare_flag
= 0;
12007 gfc_resolve_omp_directive (code
, ns
);
12008 omp_workshare_flag
= omp_workshare_save
;
12012 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12016 cs_base
= frame
.prev
;
12020 /* Resolve initial values and make sure they are compatible with
12024 resolve_values (gfc_symbol
*sym
)
12028 if (sym
->value
== NULL
)
12031 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12032 t
= resolve_structure_cons (sym
->value
, 1);
12034 t
= gfc_resolve_expr (sym
->value
);
12039 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12043 /* Verify any BIND(C) derived types in the namespace so we can report errors
12044 for them once, rather than for each variable declared of that type. */
12047 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12049 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12050 && derived_sym
->attr
.is_bind_c
== 1)
12051 verify_bind_c_derived_type (derived_sym
);
12057 /* Check the interfaces of DTIO procedures associated with derived
12058 type 'sym'. These procedures can either have typebound bindings or
12059 can appear in DTIO generic interfaces. */
12062 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12064 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12067 gfc_check_dtio_interfaces (sym
);
12072 /* Verify that any binding labels used in a given namespace do not collide
12073 with the names or binding labels of any global symbols. Multiple INTERFACE
12074 for the same procedure are permitted. */
12077 gfc_verify_binding_labels (gfc_symbol
*sym
)
12080 const char *module
;
12082 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12083 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12086 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12089 module
= sym
->module
;
12090 else if (sym
->ns
&& sym
->ns
->proc_name
12091 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12092 module
= sym
->ns
->proc_name
->name
;
12093 else if (sym
->ns
&& sym
->ns
->parent
12094 && sym
->ns
&& sym
->ns
->parent
->proc_name
12095 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12096 module
= sym
->ns
->parent
->proc_name
->name
;
12102 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12105 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12106 gsym
->where
= sym
->declared_at
;
12107 gsym
->sym_name
= sym
->name
;
12108 gsym
->binding_label
= sym
->binding_label
;
12109 gsym
->ns
= sym
->ns
;
12110 gsym
->mod_name
= module
;
12111 if (sym
->attr
.function
)
12112 gsym
->type
= GSYM_FUNCTION
;
12113 else if (sym
->attr
.subroutine
)
12114 gsym
->type
= GSYM_SUBROUTINE
;
12115 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12116 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12120 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12122 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12123 "identifier as entity at %L", sym
->name
,
12124 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12125 /* Clear the binding label to prevent checking multiple times. */
12126 sym
->binding_label
= NULL
;
12130 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12131 && (strcmp (module
, gsym
->mod_name
) != 0
12132 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12134 /* This can only happen if the variable is defined in a module - if it
12135 isn't the same module, reject it. */
12136 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12137 "uses the same global identifier as entity at %L from module %qs",
12138 sym
->name
, module
, sym
->binding_label
,
12139 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12140 sym
->binding_label
= NULL
;
12144 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12145 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12146 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12147 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12148 && (module
!= gsym
->mod_name
12149 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12150 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12152 /* Print an error if the procedure is defined multiple times; we have to
12153 exclude references to the same procedure via module association or
12154 multiple checks for the same procedure. */
12155 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12156 "global identifier as entity at %L", sym
->name
,
12157 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12158 sym
->binding_label
= NULL
;
12163 /* Resolve an index expression. */
12166 resolve_index_expr (gfc_expr
*e
)
12168 if (!gfc_resolve_expr (e
))
12171 if (!gfc_simplify_expr (e
, 0))
12174 if (!gfc_specification_expr (e
))
12181 /* Resolve a charlen structure. */
12184 resolve_charlen (gfc_charlen
*cl
)
12187 bool saved_specification_expr
;
12193 saved_specification_expr
= specification_expr
;
12194 specification_expr
= true;
12196 if (cl
->length_from_typespec
)
12198 if (!gfc_resolve_expr (cl
->length
))
12200 specification_expr
= saved_specification_expr
;
12204 if (!gfc_simplify_expr (cl
->length
, 0))
12206 specification_expr
= saved_specification_expr
;
12210 /* cl->length has been resolved. It should have an integer type. */
12211 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12213 gfc_error ("Scalar INTEGER expression expected at %L",
12214 &cl
->length
->where
);
12220 if (!resolve_index_expr (cl
->length
))
12222 specification_expr
= saved_specification_expr
;
12227 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12228 a negative value, the length of character entities declared is zero. */
12229 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12230 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12231 gfc_replace_expr (cl
->length
,
12232 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12234 /* Check that the character length is not too large. */
12235 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12236 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12237 && cl
->length
->ts
.type
== BT_INTEGER
12238 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12240 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12241 specification_expr
= saved_specification_expr
;
12245 specification_expr
= saved_specification_expr
;
12250 /* Test for non-constant shape arrays. */
12253 is_non_constant_shape_array (gfc_symbol
*sym
)
12259 not_constant
= false;
12260 if (sym
->as
!= NULL
)
12262 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12263 has not been simplified; parameter array references. Do the
12264 simplification now. */
12265 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12267 e
= sym
->as
->lower
[i
];
12268 if (e
&& (!resolve_index_expr(e
)
12269 || !gfc_is_constant_expr (e
)))
12270 not_constant
= true;
12271 e
= sym
->as
->upper
[i
];
12272 if (e
&& (!resolve_index_expr(e
)
12273 || !gfc_is_constant_expr (e
)))
12274 not_constant
= true;
12277 return not_constant
;
12280 /* Given a symbol and an initialization expression, add code to initialize
12281 the symbol to the function entry. */
12283 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12287 gfc_namespace
*ns
= sym
->ns
;
12289 /* Search for the function namespace if this is a contained
12290 function without an explicit result. */
12291 if (sym
->attr
.function
&& sym
== sym
->result
12292 && sym
->name
!= sym
->ns
->proc_name
->name
)
12294 ns
= ns
->contained
;
12295 for (;ns
; ns
= ns
->sibling
)
12296 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12302 gfc_free_expr (init
);
12306 /* Build an l-value expression for the result. */
12307 lval
= gfc_lval_expr_from_sym (sym
);
12309 /* Add the code at scope entry. */
12310 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12311 init_st
->next
= ns
->code
;
12312 ns
->code
= init_st
;
12314 /* Assign the default initializer to the l-value. */
12315 init_st
->loc
= sym
->declared_at
;
12316 init_st
->expr1
= lval
;
12317 init_st
->expr2
= init
;
12321 /* Whether or not we can generate a default initializer for a symbol. */
12324 can_generate_init (gfc_symbol
*sym
)
12326 symbol_attribute
*a
;
12331 /* These symbols should never have a default initialization. */
12336 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12337 && (CLASS_DATA (sym
)->attr
.class_pointer
12338 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12339 || a
->in_equivalence
12346 || (!a
->referenced
&& !a
->result
)
12347 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12348 || (a
->function
&& sym
!= sym
->result
)
12353 /* Assign the default initializer to a derived type variable or result. */
12356 apply_default_init (gfc_symbol
*sym
)
12358 gfc_expr
*init
= NULL
;
12360 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12363 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12364 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12366 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12369 build_init_assign (sym
, init
);
12370 sym
->attr
.referenced
= 1;
12374 /* Build an initializer for a local. Returns null if the symbol should not have
12375 a default initialization. */
12378 build_default_init_expr (gfc_symbol
*sym
)
12380 /* These symbols should never have a default initialization. */
12381 if (sym
->attr
.allocatable
12382 || sym
->attr
.external
12384 || sym
->attr
.pointer
12385 || sym
->attr
.in_equivalence
12386 || sym
->attr
.in_common
12389 || sym
->attr
.cray_pointee
12390 || sym
->attr
.cray_pointer
12394 /* Get the appropriate init expression. */
12395 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12398 /* Add an initialization expression to a local variable. */
12400 apply_default_init_local (gfc_symbol
*sym
)
12402 gfc_expr
*init
= NULL
;
12404 /* The symbol should be a variable or a function return value. */
12405 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12406 || (sym
->attr
.function
&& sym
->result
!= sym
))
12409 /* Try to build the initializer expression. If we can't initialize
12410 this symbol, then init will be NULL. */
12411 init
= build_default_init_expr (sym
);
12415 /* For saved variables, we don't want to add an initializer at function
12416 entry, so we just add a static initializer. Note that automatic variables
12417 are stack allocated even with -fno-automatic; we have also to exclude
12418 result variable, which are also nonstatic. */
12419 if (!sym
->attr
.automatic
12420 && (sym
->attr
.save
|| sym
->ns
->save_all
12421 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12422 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12423 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12425 /* Don't clobber an existing initializer! */
12426 gcc_assert (sym
->value
== NULL
);
12431 build_init_assign (sym
, init
);
12435 /* Resolution of common features of flavors variable and procedure. */
12438 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12440 gfc_array_spec
*as
;
12442 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12443 as
= CLASS_DATA (sym
)->as
;
12447 /* Constraints on deferred shape variable. */
12448 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12450 bool pointer
, allocatable
, dimension
;
12452 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12454 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12455 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12456 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12460 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12461 allocatable
= sym
->attr
.allocatable
;
12462 dimension
= sym
->attr
.dimension
;
12467 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12469 gfc_error ("Allocatable array %qs at %L must have a deferred "
12470 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12473 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12474 "%qs at %L may not be ALLOCATABLE",
12475 sym
->name
, &sym
->declared_at
))
12479 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12481 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12482 "assumed rank", sym
->name
, &sym
->declared_at
);
12488 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12489 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12491 gfc_error ("Array %qs at %L cannot have a deferred shape",
12492 sym
->name
, &sym
->declared_at
);
12497 /* Constraints on polymorphic variables. */
12498 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12501 if (sym
->attr
.class_ok
12502 && !sym
->attr
.select_type_temporary
12503 && !UNLIMITED_POLY (sym
)
12504 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12506 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12507 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12508 &sym
->declared_at
);
12513 /* Assume that use associated symbols were checked in the module ns.
12514 Class-variables that are associate-names are also something special
12515 and excepted from the test. */
12516 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12518 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12519 "or pointer", sym
->name
, &sym
->declared_at
);
12528 /* Additional checks for symbols with flavor variable and derived
12529 type. To be called from resolve_fl_variable. */
12532 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12534 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12536 /* Check to see if a derived type is blocked from being host
12537 associated by the presence of another class I symbol in the same
12538 namespace. 14.6.1.3 of the standard and the discussion on
12539 comp.lang.fortran. */
12540 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12541 && !sym
->ts
.u
.derived
->attr
.use_assoc
12542 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12545 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12546 if (s
&& s
->attr
.generic
)
12547 s
= gfc_find_dt_in_generic (s
);
12548 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12550 gfc_error ("The type %qs cannot be host associated at %L "
12551 "because it is blocked by an incompatible object "
12552 "of the same name declared at %L",
12553 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12559 /* 4th constraint in section 11.3: "If an object of a type for which
12560 component-initialization is specified (R429) appears in the
12561 specification-part of a module and does not have the ALLOCATABLE
12562 or POINTER attribute, the object shall have the SAVE attribute."
12564 The check for initializers is performed with
12565 gfc_has_default_initializer because gfc_default_initializer generates
12566 a hidden default for allocatable components. */
12567 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12568 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12569 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12570 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12571 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12572 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12573 "%qs at %L, needed due to the default "
12574 "initialization", sym
->name
, &sym
->declared_at
))
12577 /* Assign default initializer. */
12578 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12579 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12580 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12586 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12587 except in the declaration of an entity or component that has the POINTER
12588 or ALLOCATABLE attribute. */
12591 deferred_requirements (gfc_symbol
*sym
)
12593 if (sym
->ts
.deferred
12594 && !(sym
->attr
.pointer
12595 || sym
->attr
.allocatable
12596 || sym
->attr
.associate_var
12597 || sym
->attr
.omp_udr_artificial_var
))
12599 /* If a function has a result variable, only check the variable. */
12600 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12603 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12604 "requires either the POINTER or ALLOCATABLE attribute",
12605 sym
->name
, &sym
->declared_at
);
12612 /* Resolve symbols with flavor variable. */
12615 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12617 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12620 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12623 /* Set this flag to check that variables are parameters of all entries.
12624 This check is effected by the call to gfc_resolve_expr through
12625 is_non_constant_shape_array. */
12626 bool saved_specification_expr
= specification_expr
;
12627 specification_expr
= true;
12629 if (sym
->ns
->proc_name
12630 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12631 || sym
->ns
->proc_name
->attr
.is_main_program
)
12632 && !sym
->attr
.use_assoc
12633 && !sym
->attr
.allocatable
12634 && !sym
->attr
.pointer
12635 && is_non_constant_shape_array (sym
))
12637 /* F08:C541. The shape of an array defined in a main program or module
12638 * needs to be constant. */
12639 gfc_error ("The module or main program array %qs at %L must "
12640 "have constant shape", sym
->name
, &sym
->declared_at
);
12641 specification_expr
= saved_specification_expr
;
12645 /* Constraints on deferred type parameter. */
12646 if (!deferred_requirements (sym
))
12649 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12651 /* Make sure that character string variables with assumed length are
12652 dummy arguments. */
12653 gfc_expr
*e
= NULL
;
12656 e
= sym
->ts
.u
.cl
->length
;
12660 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12661 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12662 && !sym
->attr
.omp_udr_artificial_var
)
12664 gfc_error ("Entity with assumed character length at %L must be a "
12665 "dummy argument or a PARAMETER", &sym
->declared_at
);
12666 specification_expr
= saved_specification_expr
;
12670 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12672 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12673 specification_expr
= saved_specification_expr
;
12677 if (!gfc_is_constant_expr (e
)
12678 && !(e
->expr_type
== EXPR_VARIABLE
12679 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12681 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12682 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12683 || sym
->ns
->proc_name
->attr
.is_main_program
))
12685 gfc_error ("%qs at %L must have constant character length "
12686 "in this context", sym
->name
, &sym
->declared_at
);
12687 specification_expr
= saved_specification_expr
;
12690 if (sym
->attr
.in_common
)
12692 gfc_error ("COMMON variable %qs at %L must have constant "
12693 "character length", sym
->name
, &sym
->declared_at
);
12694 specification_expr
= saved_specification_expr
;
12700 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12701 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12703 /* Determine if the symbol may not have an initializer. */
12704 int no_init_flag
= 0, automatic_flag
= 0;
12705 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12706 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12708 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12709 && is_non_constant_shape_array (sym
))
12711 no_init_flag
= automatic_flag
= 1;
12713 /* Also, they must not have the SAVE attribute.
12714 SAVE_IMPLICIT is checked below. */
12715 if (sym
->as
&& sym
->attr
.codimension
)
12717 int corank
= sym
->as
->corank
;
12718 sym
->as
->corank
= 0;
12719 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12720 sym
->as
->corank
= corank
;
12722 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12724 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12725 specification_expr
= saved_specification_expr
;
12730 /* Ensure that any initializer is simplified. */
12732 gfc_simplify_expr (sym
->value
, 1);
12734 /* Reject illegal initializers. */
12735 if (!sym
->mark
&& sym
->value
)
12737 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12738 && CLASS_DATA (sym
)->attr
.allocatable
))
12739 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12740 sym
->name
, &sym
->declared_at
);
12741 else if (sym
->attr
.external
)
12742 gfc_error ("External %qs at %L cannot have an initializer",
12743 sym
->name
, &sym
->declared_at
);
12744 else if (sym
->attr
.dummy
12745 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12746 gfc_error ("Dummy %qs at %L cannot have an initializer",
12747 sym
->name
, &sym
->declared_at
);
12748 else if (sym
->attr
.intrinsic
)
12749 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12750 sym
->name
, &sym
->declared_at
);
12751 else if (sym
->attr
.result
)
12752 gfc_error ("Function result %qs at %L cannot have an initializer",
12753 sym
->name
, &sym
->declared_at
);
12754 else if (automatic_flag
)
12755 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12756 sym
->name
, &sym
->declared_at
);
12758 goto no_init_error
;
12759 specification_expr
= saved_specification_expr
;
12764 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12766 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12767 specification_expr
= saved_specification_expr
;
12771 specification_expr
= saved_specification_expr
;
12776 /* Compare the dummy characteristics of a module procedure interface
12777 declaration with the corresponding declaration in a submodule. */
12778 static gfc_formal_arglist
*new_formal
;
12779 static char errmsg
[200];
12782 compare_fsyms (gfc_symbol
*sym
)
12786 if (sym
== NULL
|| new_formal
== NULL
)
12789 fsym
= new_formal
->sym
;
12794 if (strcmp (sym
->name
, fsym
->name
) == 0)
12796 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12797 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12802 /* Resolve a procedure. */
12805 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12807 gfc_formal_arglist
*arg
;
12809 if (sym
->attr
.function
12810 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12813 /* Constraints on deferred type parameter. */
12814 if (!deferred_requirements (sym
))
12817 if (sym
->ts
.type
== BT_CHARACTER
)
12819 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12821 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12822 && !resolve_charlen (cl
))
12825 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12826 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12828 gfc_error ("Character-valued statement function %qs at %L must "
12829 "have constant length", sym
->name
, &sym
->declared_at
);
12834 /* Ensure that derived type for are not of a private type. Internal
12835 module procedures are excluded by 2.2.3.3 - i.e., they are not
12836 externally accessible and can access all the objects accessible in
12838 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12839 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12840 && gfc_check_symbol_access (sym
))
12842 gfc_interface
*iface
;
12844 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12847 && arg
->sym
->ts
.type
== BT_DERIVED
12848 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12849 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12850 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12851 "and cannot be a dummy argument"
12852 " of %qs, which is PUBLIC at %L",
12853 arg
->sym
->name
, sym
->name
,
12854 &sym
->declared_at
))
12856 /* Stop this message from recurring. */
12857 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12862 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12863 PRIVATE to the containing module. */
12864 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12866 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12869 && arg
->sym
->ts
.type
== BT_DERIVED
12870 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12871 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12872 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12873 "PUBLIC interface %qs at %L "
12874 "takes dummy arguments of %qs which "
12875 "is PRIVATE", iface
->sym
->name
,
12876 sym
->name
, &iface
->sym
->declared_at
,
12877 gfc_typename(&arg
->sym
->ts
)))
12879 /* Stop this message from recurring. */
12880 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12887 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12888 && !sym
->attr
.proc_pointer
)
12890 gfc_error ("Function %qs at %L cannot have an initializer",
12891 sym
->name
, &sym
->declared_at
);
12893 /* Make sure no second error is issued for this. */
12894 sym
->value
->error
= 1;
12898 /* An external symbol may not have an initializer because it is taken to be
12899 a procedure. Exception: Procedure Pointers. */
12900 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12902 gfc_error ("External object %qs at %L may not have an initializer",
12903 sym
->name
, &sym
->declared_at
);
12907 /* An elemental function is required to return a scalar 12.7.1 */
12908 if (sym
->attr
.elemental
&& sym
->attr
.function
12909 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12911 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12912 "result", sym
->name
, &sym
->declared_at
);
12913 /* Reset so that the error only occurs once. */
12914 sym
->attr
.elemental
= 0;
12918 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12919 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12921 gfc_error ("Statement function %qs at %L may not have pointer or "
12922 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12926 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12927 char-len-param shall not be array-valued, pointer-valued, recursive
12928 or pure. ....snip... A character value of * may only be used in the
12929 following ways: (i) Dummy arg of procedure - dummy associates with
12930 actual length; (ii) To declare a named constant; or (iii) External
12931 function - but length must be declared in calling scoping unit. */
12932 if (sym
->attr
.function
12933 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12934 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12936 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12937 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12939 if (sym
->as
&& sym
->as
->rank
)
12940 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12941 "array-valued", sym
->name
, &sym
->declared_at
);
12943 if (sym
->attr
.pointer
)
12944 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12945 "pointer-valued", sym
->name
, &sym
->declared_at
);
12947 if (sym
->attr
.pure
)
12948 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12949 "pure", sym
->name
, &sym
->declared_at
);
12951 if (sym
->attr
.recursive
)
12952 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12953 "recursive", sym
->name
, &sym
->declared_at
);
12958 /* Appendix B.2 of the standard. Contained functions give an
12959 error anyway. Deferred character length is an F2003 feature.
12960 Don't warn on intrinsic conversion functions, which start
12961 with two underscores. */
12962 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12963 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12964 gfc_notify_std (GFC_STD_F95_OBS
,
12965 "CHARACTER(*) function %qs at %L",
12966 sym
->name
, &sym
->declared_at
);
12969 /* F2008, C1218. */
12970 if (sym
->attr
.elemental
)
12972 if (sym
->attr
.proc_pointer
)
12974 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12975 sym
->name
, &sym
->declared_at
);
12978 if (sym
->attr
.dummy
)
12980 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12981 sym
->name
, &sym
->declared_at
);
12986 /* F2018, C15100: "The result of an elemental function shall be scalar,
12987 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12988 pointer is tested and caught elsewhere. */
12989 if (sym
->attr
.elemental
&& sym
->result
12990 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12992 gfc_error ("Function result variable %qs at %L of elemental "
12993 "function %qs shall not have an ALLOCATABLE or POINTER "
12994 "attribute", sym
->result
->name
,
12995 &sym
->result
->declared_at
, sym
->name
);
12999 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13001 gfc_formal_arglist
*curr_arg
;
13002 int has_non_interop_arg
= 0;
13004 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13005 sym
->common_block
))
13007 /* Clear these to prevent looking at them again if there was an
13009 sym
->attr
.is_bind_c
= 0;
13010 sym
->attr
.is_c_interop
= 0;
13011 sym
->ts
.is_c_interop
= 0;
13015 /* So far, no errors have been found. */
13016 sym
->attr
.is_c_interop
= 1;
13017 sym
->ts
.is_c_interop
= 1;
13020 curr_arg
= gfc_sym_get_dummy_args (sym
);
13021 while (curr_arg
!= NULL
)
13023 /* Skip implicitly typed dummy args here. */
13024 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13025 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13026 /* If something is found to fail, record the fact so we
13027 can mark the symbol for the procedure as not being
13028 BIND(C) to try and prevent multiple errors being
13030 has_non_interop_arg
= 1;
13032 curr_arg
= curr_arg
->next
;
13035 /* See if any of the arguments were not interoperable and if so, clear
13036 the procedure symbol to prevent duplicate error messages. */
13037 if (has_non_interop_arg
!= 0)
13039 sym
->attr
.is_c_interop
= 0;
13040 sym
->ts
.is_c_interop
= 0;
13041 sym
->attr
.is_bind_c
= 0;
13045 if (!sym
->attr
.proc_pointer
)
13047 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13049 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13050 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13053 if (sym
->attr
.intent
)
13055 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13056 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13059 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13061 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13062 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13065 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13066 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13067 || sym
->attr
.contained
))
13069 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13070 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13073 if (strcmp ("ppr@", sym
->name
) == 0)
13075 gfc_error ("Procedure pointer result %qs at %L "
13076 "is missing the pointer attribute",
13077 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13082 /* Assume that a procedure whose body is not known has references
13083 to external arrays. */
13084 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13085 sym
->attr
.array_outer_dependency
= 1;
13087 /* Compare the characteristics of a module procedure with the
13088 interface declaration. Ideally this would be done with
13089 gfc_compare_interfaces but, at present, the formal interface
13090 cannot be copied to the ts.interface. */
13091 if (sym
->attr
.module_procedure
13092 && sym
->attr
.if_source
== IFSRC_DECL
)
13095 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13097 char *submodule_name
;
13098 strcpy (name
, sym
->ns
->proc_name
->name
);
13099 module_name
= strtok (name
, ".");
13100 submodule_name
= strtok (NULL
, ".");
13102 iface
= sym
->tlink
;
13105 /* Make sure that the result uses the correct charlen for deferred
13107 if (iface
&& sym
->result
13108 && iface
->ts
.type
== BT_CHARACTER
13109 && iface
->ts
.deferred
)
13110 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13115 /* Check the procedure characteristics. */
13116 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13118 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13119 "PROCEDURE at %L and its interface in %s",
13120 &sym
->declared_at
, module_name
);
13124 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13126 gfc_error ("Mismatch in PURE attribute between MODULE "
13127 "PROCEDURE at %L and its interface in %s",
13128 &sym
->declared_at
, module_name
);
13132 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13134 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13135 "PROCEDURE at %L and its interface in %s",
13136 &sym
->declared_at
, module_name
);
13140 /* Check the result characteristics. */
13141 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13143 gfc_error ("%s between the MODULE PROCEDURE declaration "
13144 "in MODULE %qs and the declaration at %L in "
13146 errmsg
, module_name
, &sym
->declared_at
,
13147 submodule_name
? submodule_name
: module_name
);
13152 /* Check the characteristics of the formal arguments. */
13153 if (sym
->formal
&& sym
->formal_ns
)
13155 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13158 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13166 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13167 been defined and we now know their defined arguments, check that they fulfill
13168 the requirements of the standard for procedures used as finalizers. */
13171 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13173 gfc_finalizer
* list
;
13174 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13175 bool result
= true;
13176 bool seen_scalar
= false;
13179 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13182 gfc_resolve_finalizers (parent
, finalizable
);
13184 /* Ensure that derived-type components have a their finalizers resolved. */
13185 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13186 for (c
= derived
->components
; c
; c
= c
->next
)
13187 if (c
->ts
.type
== BT_DERIVED
13188 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13190 bool has_final2
= false;
13191 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13192 return false; /* Error. */
13193 has_final
= has_final
|| has_final2
;
13195 /* Return early if not finalizable. */
13199 *finalizable
= false;
13203 /* Walk over the list of finalizer-procedures, check them, and if any one
13204 does not fit in with the standard's definition, print an error and remove
13205 it from the list. */
13206 prev_link
= &derived
->f2k_derived
->finalizers
;
13207 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13209 gfc_formal_arglist
*dummy_args
;
13214 /* Skip this finalizer if we already resolved it. */
13215 if (list
->proc_tree
)
13217 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13218 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13219 seen_scalar
= true;
13220 prev_link
= &(list
->next
);
13224 /* Check this exists and is a SUBROUTINE. */
13225 if (!list
->proc_sym
->attr
.subroutine
)
13227 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13228 list
->proc_sym
->name
, &list
->where
);
13232 /* We should have exactly one argument. */
13233 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13234 if (!dummy_args
|| dummy_args
->next
)
13236 gfc_error ("FINAL procedure at %L must have exactly one argument",
13240 arg
= dummy_args
->sym
;
13242 /* This argument must be of our type. */
13243 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13245 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13246 &arg
->declared_at
, derived
->name
);
13250 /* It must neither be a pointer nor allocatable nor optional. */
13251 if (arg
->attr
.pointer
)
13253 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13254 &arg
->declared_at
);
13257 if (arg
->attr
.allocatable
)
13259 gfc_error ("Argument of FINAL procedure at %L must not be"
13260 " ALLOCATABLE", &arg
->declared_at
);
13263 if (arg
->attr
.optional
)
13265 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13266 &arg
->declared_at
);
13270 /* It must not be INTENT(OUT). */
13271 if (arg
->attr
.intent
== INTENT_OUT
)
13273 gfc_error ("Argument of FINAL procedure at %L must not be"
13274 " INTENT(OUT)", &arg
->declared_at
);
13278 /* Warn if the procedure is non-scalar and not assumed shape. */
13279 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13280 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13281 gfc_warning (OPT_Wsurprising
,
13282 "Non-scalar FINAL procedure at %L should have assumed"
13283 " shape argument", &arg
->declared_at
);
13285 /* Check that it does not match in kind and rank with a FINAL procedure
13286 defined earlier. To really loop over the *earlier* declarations,
13287 we need to walk the tail of the list as new ones were pushed at the
13289 /* TODO: Handle kind parameters once they are implemented. */
13290 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13291 for (i
= list
->next
; i
; i
= i
->next
)
13293 gfc_formal_arglist
*dummy_args
;
13295 /* Argument list might be empty; that is an error signalled earlier,
13296 but we nevertheless continued resolving. */
13297 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13300 gfc_symbol
* i_arg
= dummy_args
->sym
;
13301 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13302 if (i_rank
== my_rank
)
13304 gfc_error ("FINAL procedure %qs declared at %L has the same"
13305 " rank (%d) as %qs",
13306 list
->proc_sym
->name
, &list
->where
, my_rank
,
13307 i
->proc_sym
->name
);
13313 /* Is this the/a scalar finalizer procedure? */
13315 seen_scalar
= true;
13317 /* Find the symtree for this procedure. */
13318 gcc_assert (!list
->proc_tree
);
13319 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13321 prev_link
= &list
->next
;
13324 /* Remove wrong nodes immediately from the list so we don't risk any
13325 troubles in the future when they might fail later expectations. */
13328 *prev_link
= list
->next
;
13329 gfc_free_finalizer (i
);
13333 if (result
== false)
13336 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13337 were nodes in the list, must have been for arrays. It is surely a good
13338 idea to have a scalar version there if there's something to finalize. */
13339 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13340 gfc_warning (OPT_Wsurprising
,
13341 "Only array FINAL procedures declared for derived type %qs"
13342 " defined at %L, suggest also scalar one",
13343 derived
->name
, &derived
->declared_at
);
13345 vtab
= gfc_find_derived_vtab (derived
);
13346 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13347 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13350 *finalizable
= true;
13356 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13359 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13360 const char* generic_name
, locus where
)
13362 gfc_symbol
*sym1
, *sym2
;
13363 const char *pass1
, *pass2
;
13364 gfc_formal_arglist
*dummy_args
;
13366 gcc_assert (t1
->specific
&& t2
->specific
);
13367 gcc_assert (!t1
->specific
->is_generic
);
13368 gcc_assert (!t2
->specific
->is_generic
);
13369 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13371 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13372 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13377 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13378 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13379 || sym1
->attr
.function
!= sym2
->attr
.function
)
13381 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13382 " GENERIC %qs at %L",
13383 sym1
->name
, sym2
->name
, generic_name
, &where
);
13387 /* Determine PASS arguments. */
13388 if (t1
->specific
->nopass
)
13390 else if (t1
->specific
->pass_arg
)
13391 pass1
= t1
->specific
->pass_arg
;
13394 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13396 pass1
= dummy_args
->sym
->name
;
13400 if (t2
->specific
->nopass
)
13402 else if (t2
->specific
->pass_arg
)
13403 pass2
= t2
->specific
->pass_arg
;
13406 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13408 pass2
= dummy_args
->sym
->name
;
13413 /* Compare the interfaces. */
13414 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13415 NULL
, 0, pass1
, pass2
))
13417 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13418 sym1
->name
, sym2
->name
, generic_name
, &where
);
13426 /* Worker function for resolving a generic procedure binding; this is used to
13427 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13429 The difference between those cases is finding possible inherited bindings
13430 that are overridden, as one has to look for them in tb_sym_root,
13431 tb_uop_root or tb_op, respectively. Thus the caller must already find
13432 the super-type and set p->overridden correctly. */
13435 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13436 gfc_typebound_proc
* p
, const char* name
)
13438 gfc_tbp_generic
* target
;
13439 gfc_symtree
* first_target
;
13440 gfc_symtree
* inherited
;
13442 gcc_assert (p
&& p
->is_generic
);
13444 /* Try to find the specific bindings for the symtrees in our target-list. */
13445 gcc_assert (p
->u
.generic
);
13446 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13447 if (!target
->specific
)
13449 gfc_typebound_proc
* overridden_tbp
;
13450 gfc_tbp_generic
* g
;
13451 const char* target_name
;
13453 target_name
= target
->specific_st
->name
;
13455 /* Defined for this type directly. */
13456 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13458 target
->specific
= target
->specific_st
->n
.tb
;
13459 goto specific_found
;
13462 /* Look for an inherited specific binding. */
13465 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13470 gcc_assert (inherited
->n
.tb
);
13471 target
->specific
= inherited
->n
.tb
;
13472 goto specific_found
;
13476 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13477 " at %L", target_name
, name
, &p
->where
);
13480 /* Once we've found the specific binding, check it is not ambiguous with
13481 other specifics already found or inherited for the same GENERIC. */
13483 gcc_assert (target
->specific
);
13485 /* This must really be a specific binding! */
13486 if (target
->specific
->is_generic
)
13488 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13489 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13493 /* Check those already resolved on this type directly. */
13494 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13495 if (g
!= target
&& g
->specific
13496 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13499 /* Check for ambiguity with inherited specific targets. */
13500 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13501 overridden_tbp
= overridden_tbp
->overridden
)
13502 if (overridden_tbp
->is_generic
)
13504 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13506 gcc_assert (g
->specific
);
13507 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13513 /* If we attempt to "overwrite" a specific binding, this is an error. */
13514 if (p
->overridden
&& !p
->overridden
->is_generic
)
13516 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13517 " the same name", name
, &p
->where
);
13521 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13522 all must have the same attributes here. */
13523 first_target
= p
->u
.generic
->specific
->u
.specific
;
13524 gcc_assert (first_target
);
13525 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13526 p
->function
= first_target
->n
.sym
->attr
.function
;
13532 /* Resolve a GENERIC procedure binding for a derived type. */
13535 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13537 gfc_symbol
* super_type
;
13539 /* Find the overridden binding if any. */
13540 st
->n
.tb
->overridden
= NULL
;
13541 super_type
= gfc_get_derived_super_type (derived
);
13544 gfc_symtree
* overridden
;
13545 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13548 if (overridden
&& overridden
->n
.tb
)
13549 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13552 /* Resolve using worker function. */
13553 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13557 /* Retrieve the target-procedure of an operator binding and do some checks in
13558 common for intrinsic and user-defined type-bound operators. */
13561 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13563 gfc_symbol
* target_proc
;
13565 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13566 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13567 gcc_assert (target_proc
);
13569 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13570 if (target
->specific
->nopass
)
13572 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13576 return target_proc
;
13580 /* Resolve a type-bound intrinsic operator. */
13583 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13584 gfc_typebound_proc
* p
)
13586 gfc_symbol
* super_type
;
13587 gfc_tbp_generic
* target
;
13589 /* If there's already an error here, do nothing (but don't fail again). */
13593 /* Operators should always be GENERIC bindings. */
13594 gcc_assert (p
->is_generic
);
13596 /* Look for an overridden binding. */
13597 super_type
= gfc_get_derived_super_type (derived
);
13598 if (super_type
&& super_type
->f2k_derived
)
13599 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13602 p
->overridden
= NULL
;
13604 /* Resolve general GENERIC properties using worker function. */
13605 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13608 /* Check the targets to be procedures of correct interface. */
13609 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13611 gfc_symbol
* target_proc
;
13613 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13617 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13620 /* Add target to non-typebound operator list. */
13621 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13622 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13624 gfc_interface
*head
, *intr
;
13626 /* Preempt 'gfc_check_new_interface' for submodules, where the
13627 mechanism for handling module procedures winds up resolving
13628 operator interfaces twice and would otherwise cause an error. */
13629 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13630 if (intr
->sym
== target_proc
13631 && target_proc
->attr
.used_in_submodule
)
13634 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13635 target_proc
, p
->where
))
13637 head
= derived
->ns
->op
[op
];
13638 intr
= gfc_get_interface ();
13639 intr
->sym
= target_proc
;
13640 intr
->where
= p
->where
;
13642 derived
->ns
->op
[op
] = intr
;
13654 /* Resolve a type-bound user operator (tree-walker callback). */
13656 static gfc_symbol
* resolve_bindings_derived
;
13657 static bool resolve_bindings_result
;
13659 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13662 resolve_typebound_user_op (gfc_symtree
* stree
)
13664 gfc_symbol
* super_type
;
13665 gfc_tbp_generic
* target
;
13667 gcc_assert (stree
&& stree
->n
.tb
);
13669 if (stree
->n
.tb
->error
)
13672 /* Operators should always be GENERIC bindings. */
13673 gcc_assert (stree
->n
.tb
->is_generic
);
13675 /* Find overridden procedure, if any. */
13676 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13677 if (super_type
&& super_type
->f2k_derived
)
13679 gfc_symtree
* overridden
;
13680 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13681 stree
->name
, true, NULL
);
13683 if (overridden
&& overridden
->n
.tb
)
13684 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13687 stree
->n
.tb
->overridden
= NULL
;
13689 /* Resolve basically using worker function. */
13690 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13693 /* Check the targets to be functions of correct interface. */
13694 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13696 gfc_symbol
* target_proc
;
13698 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13702 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13709 resolve_bindings_result
= false;
13710 stree
->n
.tb
->error
= 1;
13714 /* Resolve the type-bound procedures for a derived type. */
13717 resolve_typebound_procedure (gfc_symtree
* stree
)
13721 gfc_symbol
* me_arg
;
13722 gfc_symbol
* super_type
;
13723 gfc_component
* comp
;
13725 gcc_assert (stree
);
13727 /* Undefined specific symbol from GENERIC target definition. */
13731 if (stree
->n
.tb
->error
)
13734 /* If this is a GENERIC binding, use that routine. */
13735 if (stree
->n
.tb
->is_generic
)
13737 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13742 /* Get the target-procedure to check it. */
13743 gcc_assert (!stree
->n
.tb
->is_generic
);
13744 gcc_assert (stree
->n
.tb
->u
.specific
);
13745 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13746 where
= stree
->n
.tb
->where
;
13748 /* Default access should already be resolved from the parser. */
13749 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13751 if (stree
->n
.tb
->deferred
)
13753 if (!check_proc_interface (proc
, &where
))
13758 /* If proc has not been resolved at this point, proc->name may
13759 actually be a USE associated entity. See PR fortran/89647. */
13760 if (!proc
->resolved
13761 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13764 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13765 if (tmp
&& tmp
->attr
.use_assoc
)
13767 proc
->module
= tmp
->module
;
13768 proc
->attr
.proc
= tmp
->attr
.proc
;
13769 proc
->attr
.function
= tmp
->attr
.function
;
13770 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13771 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13772 proc
->ts
= tmp
->ts
;
13773 proc
->result
= tmp
->result
;
13777 /* Check for F08:C465. */
13778 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13779 || (proc
->attr
.proc
!= PROC_MODULE
13780 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13781 || proc
->attr
.abstract
)
13783 gfc_error ("%qs must be a module procedure or an external "
13784 "procedure with an explicit interface at %L",
13785 proc
->name
, &where
);
13790 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13791 stree
->n
.tb
->function
= proc
->attr
.function
;
13793 /* Find the super-type of the current derived type. We could do this once and
13794 store in a global if speed is needed, but as long as not I believe this is
13795 more readable and clearer. */
13796 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13798 /* If PASS, resolve and check arguments if not already resolved / loaded
13799 from a .mod file. */
13800 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13802 gfc_formal_arglist
*dummy_args
;
13804 dummy_args
= gfc_sym_get_dummy_args (proc
);
13805 if (stree
->n
.tb
->pass_arg
)
13807 gfc_formal_arglist
*i
;
13809 /* If an explicit passing argument name is given, walk the arg-list
13810 and look for it. */
13813 stree
->n
.tb
->pass_arg_num
= 1;
13814 for (i
= dummy_args
; i
; i
= i
->next
)
13816 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13821 ++stree
->n
.tb
->pass_arg_num
;
13826 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13828 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13829 stree
->n
.tb
->pass_arg
);
13835 /* Otherwise, take the first one; there should in fact be at least
13837 stree
->n
.tb
->pass_arg_num
= 1;
13840 gfc_error ("Procedure %qs with PASS at %L must have at"
13841 " least one argument", proc
->name
, &where
);
13844 me_arg
= dummy_args
->sym
;
13847 /* Now check that the argument-type matches and the passed-object
13848 dummy argument is generally fine. */
13850 gcc_assert (me_arg
);
13852 if (me_arg
->ts
.type
!= BT_CLASS
)
13854 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13855 " at %L", proc
->name
, &where
);
13859 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13860 != resolve_bindings_derived
)
13862 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13863 " the derived-type %qs", me_arg
->name
, proc
->name
,
13864 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13868 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13869 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13871 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13872 " scalar", proc
->name
, &where
);
13875 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13877 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13878 " be ALLOCATABLE", proc
->name
, &where
);
13881 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13883 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13884 " be POINTER", proc
->name
, &where
);
13889 /* If we are extending some type, check that we don't override a procedure
13890 flagged NON_OVERRIDABLE. */
13891 stree
->n
.tb
->overridden
= NULL
;
13894 gfc_symtree
* overridden
;
13895 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13896 stree
->name
, true, NULL
);
13900 if (overridden
->n
.tb
)
13901 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13903 if (!gfc_check_typebound_override (stree
, overridden
))
13908 /* See if there's a name collision with a component directly in this type. */
13909 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13910 if (!strcmp (comp
->name
, stree
->name
))
13912 gfc_error ("Procedure %qs at %L has the same name as a component of"
13914 stree
->name
, &where
, resolve_bindings_derived
->name
);
13918 /* Try to find a name collision with an inherited component. */
13919 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13922 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13923 " component of %qs",
13924 stree
->name
, &where
, resolve_bindings_derived
->name
);
13928 stree
->n
.tb
->error
= 0;
13932 resolve_bindings_result
= false;
13933 stree
->n
.tb
->error
= 1;
13938 resolve_typebound_procedures (gfc_symbol
* derived
)
13941 gfc_symbol
* super_type
;
13943 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13946 super_type
= gfc_get_derived_super_type (derived
);
13948 resolve_symbol (super_type
);
13950 resolve_bindings_derived
= derived
;
13951 resolve_bindings_result
= true;
13953 if (derived
->f2k_derived
->tb_sym_root
)
13954 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13955 &resolve_typebound_procedure
);
13957 if (derived
->f2k_derived
->tb_uop_root
)
13958 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13959 &resolve_typebound_user_op
);
13961 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13963 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13964 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13965 (gfc_intrinsic_op
)op
, p
))
13966 resolve_bindings_result
= false;
13969 return resolve_bindings_result
;
13973 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13974 to give all identical derived types the same backend_decl. */
13976 add_dt_to_dt_list (gfc_symbol
*derived
)
13978 if (!derived
->dt_next
)
13980 if (gfc_derived_types
)
13982 derived
->dt_next
= gfc_derived_types
->dt_next
;
13983 gfc_derived_types
->dt_next
= derived
;
13987 derived
->dt_next
= derived
;
13989 gfc_derived_types
= derived
;
13994 /* Ensure that a derived-type is really not abstract, meaning that every
13995 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13998 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14003 if (!ensure_not_abstract_walker (sub
, st
->left
))
14005 if (!ensure_not_abstract_walker (sub
, st
->right
))
14008 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14010 gfc_symtree
* overriding
;
14011 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14014 gcc_assert (overriding
->n
.tb
);
14015 if (overriding
->n
.tb
->deferred
)
14017 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14018 " %qs is DEFERRED and not overridden",
14019 sub
->name
, &sub
->declared_at
, st
->name
);
14028 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14030 /* The algorithm used here is to recursively travel up the ancestry of sub
14031 and for each ancestor-type, check all bindings. If any of them is
14032 DEFERRED, look it up starting from sub and see if the found (overriding)
14033 binding is not DEFERRED.
14034 This is not the most efficient way to do this, but it should be ok and is
14035 clearer than something sophisticated. */
14037 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14039 if (!ancestor
->attr
.abstract
)
14042 /* Walk bindings of this ancestor. */
14043 if (ancestor
->f2k_derived
)
14046 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14051 /* Find next ancestor type and recurse on it. */
14052 ancestor
= gfc_get_derived_super_type (ancestor
);
14054 return ensure_not_abstract (sub
, ancestor
);
14060 /* This check for typebound defined assignments is done recursively
14061 since the order in which derived types are resolved is not always in
14062 order of the declarations. */
14065 check_defined_assignments (gfc_symbol
*derived
)
14069 for (c
= derived
->components
; c
; c
= c
->next
)
14071 if (!gfc_bt_struct (c
->ts
.type
)
14073 || c
->attr
.allocatable
14074 || c
->attr
.proc_pointer_comp
14075 || c
->attr
.class_pointer
14076 || c
->attr
.proc_pointer
)
14079 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14080 || (c
->ts
.u
.derived
->f2k_derived
14081 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14083 derived
->attr
.defined_assign_comp
= 1;
14087 check_defined_assignments (c
->ts
.u
.derived
);
14088 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14090 derived
->attr
.defined_assign_comp
= 1;
14097 /* Resolve a single component of a derived type or structure. */
14100 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14102 gfc_symbol
*super_type
;
14103 symbol_attribute
*attr
;
14105 if (c
->attr
.artificial
)
14108 /* Do not allow vtype components to be resolved in nameless namespaces
14109 such as block data because the procedure pointers will cause ICEs
14110 and vtables are not needed in these contexts. */
14111 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14112 && sym
->ns
->proc_name
== NULL
)
14116 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14117 && c
->attr
.codimension
14118 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14120 gfc_error ("Coarray component %qs at %L must be allocatable with "
14121 "deferred shape", c
->name
, &c
->loc
);
14126 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14127 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14129 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14130 "shall not be a coarray", c
->name
, &c
->loc
);
14135 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14136 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14137 || c
->attr
.allocatable
))
14139 gfc_error ("Component %qs at %L with coarray component "
14140 "shall be a nonpointer, nonallocatable scalar",
14146 if (c
->ts
.type
== BT_CLASS
)
14148 if (CLASS_DATA (c
))
14150 attr
= &(CLASS_DATA (c
)->attr
);
14152 /* Fix up contiguous attribute. */
14153 if (c
->attr
.contiguous
)
14154 attr
->contiguous
= 1;
14162 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14164 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14165 "is not an array pointer", c
->name
, &c
->loc
);
14169 /* F2003, 15.2.1 - length has to be one. */
14170 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14171 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14172 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14173 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14175 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14180 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14182 gfc_symbol
*ifc
= c
->ts
.interface
;
14184 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14190 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14192 /* Resolve interface and copy attributes. */
14193 if (ifc
->formal
&& !ifc
->formal_ns
)
14194 resolve_symbol (ifc
);
14195 if (ifc
->attr
.intrinsic
)
14196 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14200 c
->ts
= ifc
->result
->ts
;
14201 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14202 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14203 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14204 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14205 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14210 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14211 c
->attr
.pointer
= ifc
->attr
.pointer
;
14212 c
->attr
.dimension
= ifc
->attr
.dimension
;
14213 c
->as
= gfc_copy_array_spec (ifc
->as
);
14214 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14216 c
->ts
.interface
= ifc
;
14217 c
->attr
.function
= ifc
->attr
.function
;
14218 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14220 c
->attr
.pure
= ifc
->attr
.pure
;
14221 c
->attr
.elemental
= ifc
->attr
.elemental
;
14222 c
->attr
.recursive
= ifc
->attr
.recursive
;
14223 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14224 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14225 /* Copy char length. */
14226 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14228 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14229 if (cl
->length
&& !cl
->resolved
14230 && !gfc_resolve_expr (cl
->length
))
14239 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14241 /* Since PPCs are not implicitly typed, a PPC without an explicit
14242 interface must be a subroutine. */
14243 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14246 /* Procedure pointer components: Check PASS arg. */
14247 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14248 && !sym
->attr
.vtype
)
14250 gfc_symbol
* me_arg
;
14252 if (c
->tb
->pass_arg
)
14254 gfc_formal_arglist
* i
;
14256 /* If an explicit passing argument name is given, walk the arg-list
14257 and look for it. */
14260 c
->tb
->pass_arg_num
= 1;
14261 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14263 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14268 c
->tb
->pass_arg_num
++;
14273 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14274 "at %L has no argument %qs", c
->name
,
14275 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14282 /* Otherwise, take the first one; there should in fact be at least
14284 c
->tb
->pass_arg_num
= 1;
14285 if (!c
->ts
.interface
->formal
)
14287 gfc_error ("Procedure pointer component %qs with PASS at %L "
14288 "must have at least one argument",
14293 me_arg
= c
->ts
.interface
->formal
->sym
;
14296 /* Now check that the argument-type matches. */
14297 gcc_assert (me_arg
);
14298 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14299 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14300 || (me_arg
->ts
.type
== BT_CLASS
14301 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14303 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14304 " the derived type %qs", me_arg
->name
, c
->name
,
14305 me_arg
->name
, &c
->loc
, sym
->name
);
14310 /* Check for F03:C453. */
14311 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14313 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14314 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14320 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14322 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14323 "may not have the POINTER attribute", me_arg
->name
,
14324 c
->name
, me_arg
->name
, &c
->loc
);
14329 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14331 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14332 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14333 me_arg
->name
, &c
->loc
);
14338 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14340 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14341 " at %L", c
->name
, &c
->loc
);
14347 /* Check type-spec if this is not the parent-type component. */
14348 if (((sym
->attr
.is_class
14349 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14350 || c
!= sym
->components
->ts
.u
.derived
->components
))
14351 || (!sym
->attr
.is_class
14352 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14353 && !sym
->attr
.vtype
14354 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14357 super_type
= gfc_get_derived_super_type (sym
);
14359 /* If this type is an extension, set the accessibility of the parent
14362 && ((sym
->attr
.is_class
14363 && c
== sym
->components
->ts
.u
.derived
->components
)
14364 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14365 && strcmp (super_type
->name
, c
->name
) == 0)
14366 c
->attr
.access
= super_type
->attr
.access
;
14368 /* If this type is an extension, see if this component has the same name
14369 as an inherited type-bound procedure. */
14370 if (super_type
&& !sym
->attr
.is_class
14371 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14373 gfc_error ("Component %qs of %qs at %L has the same name as an"
14374 " inherited type-bound procedure",
14375 c
->name
, sym
->name
, &c
->loc
);
14379 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14380 && !c
->ts
.deferred
)
14382 if (c
->ts
.u
.cl
->length
== NULL
14383 || (!resolve_charlen(c
->ts
.u
.cl
))
14384 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14386 gfc_error ("Character length of component %qs needs to "
14387 "be a constant specification expression at %L",
14389 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14394 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14395 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14397 gfc_error ("Character component %qs of %qs at %L with deferred "
14398 "length must be a POINTER or ALLOCATABLE",
14399 c
->name
, sym
->name
, &c
->loc
);
14403 /* Add the hidden deferred length field. */
14404 if (c
->ts
.type
== BT_CHARACTER
14405 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14406 && !c
->attr
.function
14407 && !sym
->attr
.is_class
)
14409 char name
[GFC_MAX_SYMBOL_LEN
+9];
14410 gfc_component
*strlen
;
14411 sprintf (name
, "_%s_length", c
->name
);
14412 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14413 if (strlen
== NULL
)
14415 if (!gfc_add_component (sym
, name
, &strlen
))
14417 strlen
->ts
.type
= BT_INTEGER
;
14418 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14419 strlen
->attr
.access
= ACCESS_PRIVATE
;
14420 strlen
->attr
.artificial
= 1;
14424 if (c
->ts
.type
== BT_DERIVED
14425 && sym
->component_access
!= ACCESS_PRIVATE
14426 && gfc_check_symbol_access (sym
)
14427 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14428 && !c
->ts
.u
.derived
->attr
.use_assoc
14429 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14430 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14431 "PRIVATE type and cannot be a component of "
14432 "%qs, which is PUBLIC at %L", c
->name
,
14433 sym
->name
, &sym
->declared_at
))
14436 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14438 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14439 "type %s", c
->name
, &c
->loc
, sym
->name
);
14443 if (sym
->attr
.sequence
)
14445 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14447 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14448 "not have the SEQUENCE attribute",
14449 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14454 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14455 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14456 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14457 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14458 CLASS_DATA (c
)->ts
.u
.derived
14459 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14461 /* If an allocatable component derived type is of the same type as
14462 the enclosing derived type, we need a vtable generating so that
14463 the __deallocate procedure is created. */
14464 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14465 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14466 gfc_find_vtab (&c
->ts
);
14468 /* Ensure that all the derived type components are put on the
14469 derived type list; even in formal namespaces, where derived type
14470 pointer components might not have been declared. */
14471 if (c
->ts
.type
== BT_DERIVED
14473 && c
->ts
.u
.derived
->components
14475 && sym
!= c
->ts
.u
.derived
)
14476 add_dt_to_dt_list (c
->ts
.u
.derived
);
14478 if (!gfc_resolve_array_spec (c
->as
,
14479 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14480 || c
->attr
.allocatable
)))
14483 if (c
->initializer
&& !sym
->attr
.vtype
14484 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14485 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14492 /* Be nice about the locus for a structure expression - show the locus of the
14493 first non-null sub-expression if we can. */
14496 cons_where (gfc_expr
*struct_expr
)
14498 gfc_constructor
*cons
;
14500 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14502 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14503 for (; cons
; cons
= gfc_constructor_next (cons
))
14505 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14506 return &cons
->expr
->where
;
14509 return &struct_expr
->where
;
14512 /* Resolve the components of a structure type. Much less work than derived
14516 resolve_fl_struct (gfc_symbol
*sym
)
14519 gfc_expr
*init
= NULL
;
14522 /* Make sure UNIONs do not have overlapping initializers. */
14523 if (sym
->attr
.flavor
== FL_UNION
)
14525 for (c
= sym
->components
; c
; c
= c
->next
)
14527 if (init
&& c
->initializer
)
14529 gfc_error ("Conflicting initializers in union at %L and %L",
14530 cons_where (init
), cons_where (c
->initializer
));
14531 gfc_free_expr (c
->initializer
);
14532 c
->initializer
= NULL
;
14535 init
= c
->initializer
;
14540 for (c
= sym
->components
; c
; c
= c
->next
)
14541 if (!resolve_component (c
, sym
))
14547 if (sym
->components
)
14548 add_dt_to_dt_list (sym
);
14554 /* Resolve the components of a derived type. This does not have to wait until
14555 resolution stage, but can be done as soon as the dt declaration has been
14559 resolve_fl_derived0 (gfc_symbol
*sym
)
14561 gfc_symbol
* super_type
;
14563 gfc_formal_arglist
*f
;
14566 if (sym
->attr
.unlimited_polymorphic
)
14569 super_type
= gfc_get_derived_super_type (sym
);
14572 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14574 gfc_error ("As extending type %qs at %L has a coarray component, "
14575 "parent type %qs shall also have one", sym
->name
,
14576 &sym
->declared_at
, super_type
->name
);
14580 /* Ensure the extended type gets resolved before we do. */
14581 if (super_type
&& !resolve_fl_derived0 (super_type
))
14584 /* An ABSTRACT type must be extensible. */
14585 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14587 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14588 sym
->name
, &sym
->declared_at
);
14592 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14596 for ( ; c
!= NULL
; c
= c
->next
)
14597 if (!resolve_component (c
, sym
))
14603 /* Now add the caf token field, where needed. */
14604 if (flag_coarray
!= GFC_FCOARRAY_NONE
14605 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14607 for (c
= sym
->components
; c
; c
= c
->next
)
14608 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14609 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14611 char name
[GFC_MAX_SYMBOL_LEN
+9];
14612 gfc_component
*token
;
14613 sprintf (name
, "_caf_%s", c
->name
);
14614 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14617 if (!gfc_add_component (sym
, name
, &token
))
14619 token
->ts
.type
= BT_VOID
;
14620 token
->ts
.kind
= gfc_default_integer_kind
;
14621 token
->attr
.access
= ACCESS_PRIVATE
;
14622 token
->attr
.artificial
= 1;
14623 token
->attr
.caf_token
= 1;
14628 check_defined_assignments (sym
);
14630 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14631 sym
->attr
.defined_assign_comp
14632 = super_type
->attr
.defined_assign_comp
;
14634 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14635 all DEFERRED bindings are overridden. */
14636 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14637 && !sym
->attr
.is_class
14638 && !ensure_not_abstract (sym
, super_type
))
14641 /* Check that there is a component for every PDT parameter. */
14642 if (sym
->attr
.pdt_template
)
14644 for (f
= sym
->formal
; f
; f
= f
->next
)
14648 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14651 gfc_error ("Parameterized type %qs does not have a component "
14652 "corresponding to parameter %qs at %L", sym
->name
,
14653 f
->sym
->name
, &sym
->declared_at
);
14659 /* Add derived type to the derived type list. */
14660 add_dt_to_dt_list (sym
);
14666 /* The following procedure does the full resolution of a derived type,
14667 including resolution of all type-bound procedures (if present). In contrast
14668 to 'resolve_fl_derived0' this can only be done after the module has been
14669 parsed completely. */
14672 resolve_fl_derived (gfc_symbol
*sym
)
14674 gfc_symbol
*gen_dt
= NULL
;
14676 if (sym
->attr
.unlimited_polymorphic
)
14679 if (!sym
->attr
.is_class
)
14680 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14681 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14682 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14683 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14684 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14685 "%qs at %L being the same name as derived "
14686 "type at %L", sym
->name
,
14687 gen_dt
->generic
->sym
== sym
14688 ? gen_dt
->generic
->next
->sym
->name
14689 : gen_dt
->generic
->sym
->name
,
14690 gen_dt
->generic
->sym
== sym
14691 ? &gen_dt
->generic
->next
->sym
->declared_at
14692 : &gen_dt
->generic
->sym
->declared_at
,
14693 &sym
->declared_at
))
14696 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14698 gfc_error ("Derived type %qs at %L has not been declared",
14699 sym
->name
, &sym
->declared_at
);
14703 /* Resolve the finalizer procedures. */
14704 if (!gfc_resolve_finalizers (sym
, NULL
))
14707 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14709 /* Fix up incomplete CLASS symbols. */
14710 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14711 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14713 /* Nothing more to do for unlimited polymorphic entities. */
14714 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14716 else if (vptr
->ts
.u
.derived
== NULL
)
14718 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14720 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14721 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14726 if (!resolve_fl_derived0 (sym
))
14729 /* Resolve the type-bound procedures. */
14730 if (!resolve_typebound_procedures (sym
))
14733 /* Generate module vtables subject to their accessibility and their not
14734 being vtables or pdt templates. If this is not done class declarations
14735 in external procedures wind up with their own version and so SELECT TYPE
14736 fails because the vptrs do not have the same address. */
14737 if (gfc_option
.allow_std
& GFC_STD_F2003
14738 && sym
->ns
->proc_name
14739 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14740 && sym
->attr
.access
!= ACCESS_PRIVATE
14741 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14743 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14744 gfc_set_sym_referenced (vtab
);
14752 resolve_fl_namelist (gfc_symbol
*sym
)
14757 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14759 /* Check again, the check in match only works if NAMELIST comes
14761 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14763 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14764 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14768 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14769 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14770 "with assumed shape in namelist %qs at %L",
14771 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14774 if (is_non_constant_shape_array (nl
->sym
)
14775 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14776 "with nonconstant shape in namelist %qs at %L",
14777 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14780 if (nl
->sym
->ts
.type
== BT_CHARACTER
14781 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14782 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14783 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14784 "nonconstant character length in "
14785 "namelist %qs at %L", nl
->sym
->name
,
14786 sym
->name
, &sym
->declared_at
))
14791 /* Reject PRIVATE objects in a PUBLIC namelist. */
14792 if (gfc_check_symbol_access (sym
))
14794 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14796 if (!nl
->sym
->attr
.use_assoc
14797 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14798 && !gfc_check_symbol_access (nl
->sym
))
14800 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14801 "cannot be member of PUBLIC namelist %qs at %L",
14802 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14806 if (nl
->sym
->ts
.type
== BT_DERIVED
14807 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14808 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14810 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14811 "namelist %qs at %L with ALLOCATABLE "
14812 "or POINTER components", nl
->sym
->name
,
14813 sym
->name
, &sym
->declared_at
))
14818 /* Types with private components that came here by USE-association. */
14819 if (nl
->sym
->ts
.type
== BT_DERIVED
14820 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14822 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14823 "components and cannot be member of namelist %qs at %L",
14824 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14828 /* Types with private components that are defined in the same module. */
14829 if (nl
->sym
->ts
.type
== BT_DERIVED
14830 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14831 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14833 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14834 "cannot be a member of PUBLIC namelist %qs at %L",
14835 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14842 /* 14.1.2 A module or internal procedure represent local entities
14843 of the same type as a namelist member and so are not allowed. */
14844 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14846 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14849 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14850 if ((nl
->sym
== sym
->ns
->proc_name
)
14852 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14857 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14858 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14860 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14861 "attribute in %qs at %L", nlsym
->name
,
14862 &sym
->declared_at
);
14869 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14870 nl
->sym
->attr
.asynchronous
= 1;
14877 resolve_fl_parameter (gfc_symbol
*sym
)
14879 /* A parameter array's shape needs to be constant. */
14880 if (sym
->as
!= NULL
14881 && (sym
->as
->type
== AS_DEFERRED
14882 || is_non_constant_shape_array (sym
)))
14884 gfc_error ("Parameter array %qs at %L cannot be automatic "
14885 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14889 /* Constraints on deferred type parameter. */
14890 if (!deferred_requirements (sym
))
14893 /* Make sure a parameter that has been implicitly typed still
14894 matches the implicit type, since PARAMETER statements can precede
14895 IMPLICIT statements. */
14896 if (sym
->attr
.implicit_type
14897 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14900 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14901 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14905 /* Make sure the types of derived parameters are consistent. This
14906 type checking is deferred until resolution because the type may
14907 refer to a derived type from the host. */
14908 if (sym
->ts
.type
== BT_DERIVED
14909 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14911 gfc_error ("Incompatible derived type in PARAMETER at %L",
14912 &sym
->value
->where
);
14916 /* F03:C509,C514. */
14917 if (sym
->ts
.type
== BT_CLASS
)
14919 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14920 sym
->name
, &sym
->declared_at
);
14928 /* Called by resolve_symbol to check PDTs. */
14931 resolve_pdt (gfc_symbol
* sym
)
14933 gfc_symbol
*derived
= NULL
;
14934 gfc_actual_arglist
*param
;
14936 bool const_len_exprs
= true;
14937 bool assumed_len_exprs
= false;
14938 symbol_attribute
*attr
;
14940 if (sym
->ts
.type
== BT_DERIVED
)
14942 derived
= sym
->ts
.u
.derived
;
14943 attr
= &(sym
->attr
);
14945 else if (sym
->ts
.type
== BT_CLASS
)
14947 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14948 attr
= &(CLASS_DATA (sym
)->attr
);
14951 gcc_unreachable ();
14953 gcc_assert (derived
->attr
.pdt_type
);
14955 for (param
= sym
->param_list
; param
; param
= param
->next
)
14957 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14959 if (c
->attr
.pdt_kind
)
14962 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14963 && c
->attr
.pdt_len
)
14964 const_len_exprs
= false;
14965 else if (param
->spec_type
== SPEC_ASSUMED
)
14966 assumed_len_exprs
= true;
14968 if (param
->spec_type
== SPEC_DEFERRED
14969 && !attr
->allocatable
&& !attr
->pointer
)
14970 gfc_error ("The object %qs at %L has a deferred LEN "
14971 "parameter %qs and is neither allocatable "
14972 "nor a pointer", sym
->name
, &sym
->declared_at
,
14977 if (!const_len_exprs
14978 && (sym
->ns
->proc_name
->attr
.is_main_program
14979 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14980 || sym
->attr
.save
!= SAVE_NONE
))
14981 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14982 "SAVE attribute or be a variable declared in the "
14983 "main program, a module or a submodule(F08/C513)",
14984 sym
->name
, &sym
->declared_at
);
14986 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14987 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14988 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14989 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14990 sym
->name
, &sym
->declared_at
);
14994 /* Do anything necessary to resolve a symbol. Right now, we just
14995 assume that an otherwise unknown symbol is a variable. This sort
14996 of thing commonly happens for symbols in module. */
14999 resolve_symbol (gfc_symbol
*sym
)
15001 int check_constant
, mp_flag
;
15002 gfc_symtree
*symtree
;
15003 gfc_symtree
*this_symtree
;
15006 symbol_attribute class_attr
;
15007 gfc_array_spec
*as
;
15008 bool saved_specification_expr
;
15014 /* No symbol will ever have union type; only components can be unions.
15015 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15016 (just like derived type declaration symbols have flavor FL_DERIVED). */
15017 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15019 /* Coarrayed polymorphic objects with allocatable or pointer components are
15020 yet unsupported for -fcoarray=lib. */
15021 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15022 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15023 && CLASS_DATA (sym
)->attr
.codimension
15024 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15025 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15027 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15028 "type coarrays at %L are unsupported", &sym
->declared_at
);
15032 if (sym
->attr
.artificial
)
15035 if (sym
->attr
.unlimited_polymorphic
)
15038 if (sym
->attr
.flavor
== FL_UNKNOWN
15039 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15040 && !sym
->attr
.generic
&& !sym
->attr
.external
15041 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15042 && sym
->ts
.type
== BT_UNKNOWN
))
15045 /* If we find that a flavorless symbol is an interface in one of the
15046 parent namespaces, find its symtree in this namespace, free the
15047 symbol and set the symtree to point to the interface symbol. */
15048 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15050 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15051 if (symtree
&& (symtree
->n
.sym
->generic
||
15052 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15053 && sym
->ns
->construct_entities
)))
15055 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15057 if (this_symtree
->n
.sym
== sym
)
15059 symtree
->n
.sym
->refs
++;
15060 gfc_release_symbol (sym
);
15061 this_symtree
->n
.sym
= symtree
->n
.sym
;
15067 /* Otherwise give it a flavor according to such attributes as
15069 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15070 && sym
->attr
.intrinsic
== 0)
15071 sym
->attr
.flavor
= FL_VARIABLE
;
15072 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15074 sym
->attr
.flavor
= FL_PROCEDURE
;
15075 if (sym
->attr
.dimension
)
15076 sym
->attr
.function
= 1;
15080 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15081 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15083 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15084 && !resolve_procedure_interface (sym
))
15087 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15088 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15090 if (sym
->attr
.external
)
15091 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15092 "at %L", &sym
->declared_at
);
15094 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15095 "at %L", &sym
->declared_at
);
15100 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15103 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15104 && !resolve_fl_struct (sym
))
15107 /* Symbols that are module procedures with results (functions) have
15108 the types and array specification copied for type checking in
15109 procedures that call them, as well as for saving to a module
15110 file. These symbols can't stand the scrutiny that their results
15112 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15114 /* Make sure that the intrinsic is consistent with its internal
15115 representation. This needs to be done before assigning a default
15116 type to avoid spurious warnings. */
15117 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15118 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15121 /* Resolve associate names. */
15123 resolve_assoc_var (sym
, true);
15125 /* Assign default type to symbols that need one and don't have one. */
15126 if (sym
->ts
.type
== BT_UNKNOWN
)
15128 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15130 gfc_set_default_type (sym
, 1, NULL
);
15133 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15134 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15135 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15136 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15138 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15140 /* The specific case of an external procedure should emit an error
15141 in the case that there is no implicit type. */
15144 if (!sym
->attr
.mixed_entry_master
)
15145 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15149 /* Result may be in another namespace. */
15150 resolve_symbol (sym
->result
);
15152 if (!sym
->result
->attr
.proc_pointer
)
15154 sym
->ts
= sym
->result
->ts
;
15155 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15156 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15157 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15158 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15159 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15164 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15166 bool saved_specification_expr
= specification_expr
;
15167 specification_expr
= true;
15168 gfc_resolve_array_spec (sym
->result
->as
, false);
15169 specification_expr
= saved_specification_expr
;
15172 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15174 as
= CLASS_DATA (sym
)->as
;
15175 class_attr
= CLASS_DATA (sym
)->attr
;
15176 class_attr
.pointer
= class_attr
.class_pointer
;
15180 class_attr
= sym
->attr
;
15185 if (sym
->attr
.contiguous
15186 && (!class_attr
.dimension
15187 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15188 && !class_attr
.pointer
)))
15190 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15191 "array pointer or an assumed-shape or assumed-rank array",
15192 sym
->name
, &sym
->declared_at
);
15196 /* Assumed size arrays and assumed shape arrays must be dummy
15197 arguments. Array-spec's of implied-shape should have been resolved to
15198 AS_EXPLICIT already. */
15202 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15203 specification expression. */
15204 if (as
->type
== AS_IMPLIED_SHAPE
)
15207 for (i
=0; i
<as
->rank
; i
++)
15209 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15211 gfc_error ("Bad specification for assumed size array at %L",
15212 &as
->lower
[i
]->where
);
15219 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15220 || as
->type
== AS_ASSUMED_SHAPE
)
15221 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15223 if (as
->type
== AS_ASSUMED_SIZE
)
15224 gfc_error ("Assumed size array at %L must be a dummy argument",
15225 &sym
->declared_at
);
15227 gfc_error ("Assumed shape array at %L must be a dummy argument",
15228 &sym
->declared_at
);
15231 /* TS 29113, C535a. */
15232 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15233 && !sym
->attr
.select_type_temporary
15234 && !(cs_base
&& cs_base
->current
15235 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15237 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15238 &sym
->declared_at
);
15241 if (as
->type
== AS_ASSUMED_RANK
15242 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15244 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15245 "CODIMENSION attribute", &sym
->declared_at
);
15250 /* Make sure symbols with known intent or optional are really dummy
15251 variable. Because of ENTRY statement, this has to be deferred
15252 until resolution time. */
15254 if (!sym
->attr
.dummy
15255 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15257 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15261 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15263 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15264 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15268 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15270 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15271 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15273 gfc_error ("Character dummy variable %qs at %L with VALUE "
15274 "attribute must have constant length",
15275 sym
->name
, &sym
->declared_at
);
15279 if (sym
->ts
.is_c_interop
15280 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15282 gfc_error ("C interoperable character dummy variable %qs at %L "
15283 "with VALUE attribute must have length one",
15284 sym
->name
, &sym
->declared_at
);
15289 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15290 && sym
->ts
.u
.derived
->attr
.generic
)
15292 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15293 if (!sym
->ts
.u
.derived
)
15295 gfc_error ("The derived type %qs at %L is of type %qs, "
15296 "which has not been defined", sym
->name
,
15297 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15298 sym
->ts
.type
= BT_UNKNOWN
;
15303 /* Use the same constraints as TYPE(*), except for the type check
15304 and that only scalars and assumed-size arrays are permitted. */
15305 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15307 if (!sym
->attr
.dummy
)
15309 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15310 "a dummy argument", sym
->name
, &sym
->declared_at
);
15314 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15315 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15316 && sym
->ts
.type
!= BT_COMPLEX
)
15318 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15319 "of type TYPE(*) or of an numeric intrinsic type",
15320 sym
->name
, &sym
->declared_at
);
15324 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15325 || sym
->attr
.pointer
|| sym
->attr
.value
)
15327 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15328 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15329 "attribute", sym
->name
, &sym
->declared_at
);
15333 if (sym
->attr
.intent
== INTENT_OUT
)
15335 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15336 "have the INTENT(OUT) attribute",
15337 sym
->name
, &sym
->declared_at
);
15340 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15342 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15343 "either be a scalar or an assumed-size array",
15344 sym
->name
, &sym
->declared_at
);
15348 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15349 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15351 sym
->ts
.type
= BT_ASSUMED
;
15352 sym
->as
= gfc_get_array_spec ();
15353 sym
->as
->type
= AS_ASSUMED_SIZE
;
15355 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15357 else if (sym
->ts
.type
== BT_ASSUMED
)
15359 /* TS 29113, C407a. */
15360 if (!sym
->attr
.dummy
)
15362 gfc_error ("Assumed type of variable %s at %L is only permitted "
15363 "for dummy variables", sym
->name
, &sym
->declared_at
);
15366 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15367 || sym
->attr
.pointer
|| sym
->attr
.value
)
15369 gfc_error ("Assumed-type variable %s at %L may not have the "
15370 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15371 sym
->name
, &sym
->declared_at
);
15374 if (sym
->attr
.intent
== INTENT_OUT
)
15376 gfc_error ("Assumed-type variable %s at %L may not have the "
15377 "INTENT(OUT) attribute",
15378 sym
->name
, &sym
->declared_at
);
15381 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15383 gfc_error ("Assumed-type variable %s at %L shall not be an "
15384 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15389 /* If the symbol is marked as bind(c), that it is declared at module level
15390 scope and verify its type and kind. Do not do the latter for symbols
15391 that are implicitly typed because that is handled in
15392 gfc_set_default_type. Handle dummy arguments and procedure definitions
15393 separately. Also, anything that is use associated is not handled here
15394 but instead is handled in the module it is declared in. Finally, derived
15395 type definitions are allowed to be BIND(C) since that only implies that
15396 they're interoperable, and they are checked fully for interoperability
15397 when a variable is declared of that type. */
15398 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15399 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15400 && sym
->attr
.flavor
!= FL_DERIVED
)
15404 /* First, make sure the variable is declared at the
15405 module-level scope (J3/04-007, Section 15.3). */
15406 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15407 sym
->attr
.in_common
== 0)
15409 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15410 "is neither a COMMON block nor declared at the "
15411 "module level scope", sym
->name
, &(sym
->declared_at
));
15414 else if (sym
->ts
.type
== BT_CHARACTER
15415 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15416 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15417 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15419 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15420 sym
->name
, &sym
->declared_at
);
15423 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15425 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15427 else if (sym
->attr
.implicit_type
== 0)
15429 /* If type() declaration, we need to verify that the components
15430 of the given type are all C interoperable, etc. */
15431 if (sym
->ts
.type
== BT_DERIVED
&&
15432 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15434 /* Make sure the user marked the derived type as BIND(C). If
15435 not, call the verify routine. This could print an error
15436 for the derived type more than once if multiple variables
15437 of that type are declared. */
15438 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15439 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15443 /* Verify the variable itself as C interoperable if it
15444 is BIND(C). It is not possible for this to succeed if
15445 the verify_bind_c_derived_type failed, so don't have to handle
15446 any error returned by verify_bind_c_derived_type. */
15447 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15448 sym
->common_block
);
15453 /* clear the is_bind_c flag to prevent reporting errors more than
15454 once if something failed. */
15455 sym
->attr
.is_bind_c
= 0;
15460 /* If a derived type symbol has reached this point, without its
15461 type being declared, we have an error. Notice that most
15462 conditions that produce undefined derived types have already
15463 been dealt with. However, the likes of:
15464 implicit type(t) (t) ..... call foo (t) will get us here if
15465 the type is not declared in the scope of the implicit
15466 statement. Change the type to BT_UNKNOWN, both because it is so
15467 and to prevent an ICE. */
15468 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15469 && sym
->ts
.u
.derived
->components
== NULL
15470 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15472 gfc_error ("The derived type %qs at %L is of type %qs, "
15473 "which has not been defined", sym
->name
,
15474 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15475 sym
->ts
.type
= BT_UNKNOWN
;
15479 /* Make sure that the derived type has been resolved and that the
15480 derived type is visible in the symbol's namespace, if it is a
15481 module function and is not PRIVATE. */
15482 if (sym
->ts
.type
== BT_DERIVED
15483 && sym
->ts
.u
.derived
->attr
.use_assoc
15484 && sym
->ns
->proc_name
15485 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15486 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15489 /* Unless the derived-type declaration is use associated, Fortran 95
15490 does not allow public entries of private derived types.
15491 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15492 161 in 95-006r3. */
15493 if (sym
->ts
.type
== BT_DERIVED
15494 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15495 && !sym
->ts
.u
.derived
->attr
.use_assoc
15496 && gfc_check_symbol_access (sym
)
15497 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15498 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15499 "derived type %qs",
15500 (sym
->attr
.flavor
== FL_PARAMETER
)
15501 ? "parameter" : "variable",
15502 sym
->name
, &sym
->declared_at
,
15503 sym
->ts
.u
.derived
->name
))
15506 /* F2008, C1302. */
15507 if (sym
->ts
.type
== BT_DERIVED
15508 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15509 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15510 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15511 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15513 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15514 "type LOCK_TYPE must be a coarray", sym
->name
,
15515 &sym
->declared_at
);
15519 /* TS18508, C702/C703. */
15520 if (sym
->ts
.type
== BT_DERIVED
15521 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15522 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15523 || sym
->ts
.u
.derived
->attr
.event_comp
)
15524 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15526 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15527 "type EVENT_TYPE must be a coarray", sym
->name
,
15528 &sym
->declared_at
);
15532 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15533 default initialization is defined (5.1.2.4.4). */
15534 if (sym
->ts
.type
== BT_DERIVED
15536 && sym
->attr
.intent
== INTENT_OUT
15538 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15540 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15542 if (c
->initializer
)
15544 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15545 "ASSUMED SIZE and so cannot have a default initializer",
15546 sym
->name
, &sym
->declared_at
);
15553 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15554 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15556 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15557 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15562 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15563 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15565 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15566 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15571 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15572 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15573 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15574 || class_attr
.codimension
)
15575 && (sym
->attr
.result
|| sym
->result
== sym
))
15577 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15578 "a coarray component", sym
->name
, &sym
->declared_at
);
15583 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15584 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15586 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15587 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15592 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15593 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15594 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15595 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15596 || class_attr
.allocatable
))
15598 gfc_error ("Variable %qs at %L with coarray component shall be a "
15599 "nonpointer, nonallocatable scalar, which is not a coarray",
15600 sym
->name
, &sym
->declared_at
);
15604 /* F2008, C526. The function-result case was handled above. */
15605 if (class_attr
.codimension
15606 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15607 || sym
->attr
.select_type_temporary
15608 || sym
->attr
.associate_var
15609 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15610 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15611 || sym
->ns
->proc_name
->attr
.is_main_program
15612 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15614 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15615 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15619 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15620 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15622 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15623 "deferred shape", sym
->name
, &sym
->declared_at
);
15626 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15627 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15629 gfc_error ("Allocatable coarray variable %qs at %L must have "
15630 "deferred shape", sym
->name
, &sym
->declared_at
);
15635 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15636 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15637 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15638 || (class_attr
.codimension
&& class_attr
.allocatable
))
15639 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15641 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15642 "allocatable coarray or have coarray components",
15643 sym
->name
, &sym
->declared_at
);
15647 if (class_attr
.codimension
&& sym
->attr
.dummy
15648 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15650 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15651 "procedure %qs", sym
->name
, &sym
->declared_at
,
15652 sym
->ns
->proc_name
->name
);
15656 if (sym
->ts
.type
== BT_LOGICAL
15657 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15658 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15659 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15662 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15663 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15665 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15666 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15667 "%L with non-C_Bool kind in BIND(C) procedure "
15668 "%qs", sym
->name
, &sym
->declared_at
,
15669 sym
->ns
->proc_name
->name
))
15671 else if (!gfc_logical_kinds
[i
].c_bool
15672 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15673 "%qs at %L with non-C_Bool kind in "
15674 "BIND(C) procedure %qs", sym
->name
,
15676 sym
->attr
.function
? sym
->name
15677 : sym
->ns
->proc_name
->name
))
15681 switch (sym
->attr
.flavor
)
15684 if (!resolve_fl_variable (sym
, mp_flag
))
15689 if (sym
->formal
&& !sym
->formal_ns
)
15691 /* Check that none of the arguments are a namelist. */
15692 gfc_formal_arglist
*formal
= sym
->formal
;
15694 for (; formal
; formal
= formal
->next
)
15695 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15697 gfc_error ("Namelist %qs cannot be an argument to "
15698 "subroutine or function at %L",
15699 formal
->sym
->name
, &sym
->declared_at
);
15704 if (!resolve_fl_procedure (sym
, mp_flag
))
15709 if (!resolve_fl_namelist (sym
))
15714 if (!resolve_fl_parameter (sym
))
15722 /* Resolve array specifier. Check as well some constraints
15723 on COMMON blocks. */
15725 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15727 /* Set the formal_arg_flag so that check_conflict will not throw
15728 an error for host associated variables in the specification
15729 expression for an array_valued function. */
15730 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15731 formal_arg_flag
= true;
15733 saved_specification_expr
= specification_expr
;
15734 specification_expr
= true;
15735 gfc_resolve_array_spec (sym
->as
, check_constant
);
15736 specification_expr
= saved_specification_expr
;
15738 formal_arg_flag
= false;
15740 /* Resolve formal namespaces. */
15741 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15742 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15743 gfc_resolve (sym
->formal_ns
);
15745 /* Make sure the formal namespace is present. */
15746 if (sym
->formal
&& !sym
->formal_ns
)
15748 gfc_formal_arglist
*formal
= sym
->formal
;
15749 while (formal
&& !formal
->sym
)
15750 formal
= formal
->next
;
15754 sym
->formal_ns
= formal
->sym
->ns
;
15755 if (sym
->ns
!= formal
->sym
->ns
)
15756 sym
->formal_ns
->refs
++;
15760 /* Check threadprivate restrictions. */
15761 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15762 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15763 && (!sym
->attr
.in_common
15764 && sym
->module
== NULL
15765 && (sym
->ns
->proc_name
== NULL
15766 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15767 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15769 /* Check omp declare target restrictions. */
15770 if (sym
->attr
.omp_declare_target
15771 && sym
->attr
.flavor
== FL_VARIABLE
15773 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15774 && (!sym
->attr
.in_common
15775 && sym
->module
== NULL
15776 && (sym
->ns
->proc_name
== NULL
15777 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15778 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15779 sym
->name
, &sym
->declared_at
);
15781 /* If we have come this far we can apply default-initializers, as
15782 described in 14.7.5, to those variables that have not already
15783 been assigned one. */
15784 if (sym
->ts
.type
== BT_DERIVED
15786 && !sym
->attr
.allocatable
15787 && !sym
->attr
.alloc_comp
)
15789 symbol_attribute
*a
= &sym
->attr
;
15791 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15792 && !a
->in_common
&& !a
->use_assoc
15794 && !((a
->function
|| a
->result
)
15796 || sym
->ts
.u
.derived
->attr
.alloc_comp
15797 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15798 && !(a
->function
&& sym
!= sym
->result
))
15799 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15800 apply_default_init (sym
);
15801 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15802 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15803 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15804 /* Mark the result symbol to be referenced, when it has allocatable
15806 sym
->result
->attr
.referenced
= 1;
15809 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15810 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15811 && !CLASS_DATA (sym
)->attr
.class_pointer
15812 && !CLASS_DATA (sym
)->attr
.allocatable
)
15813 apply_default_init (sym
);
15815 /* If this symbol has a type-spec, check it. */
15816 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15817 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15818 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15821 if (sym
->param_list
)
15826 /************* Resolve DATA statements *************/
15830 gfc_data_value
*vnode
;
15836 /* Advance the values structure to point to the next value in the data list. */
15839 next_data_value (void)
15841 while (mpz_cmp_ui (values
.left
, 0) == 0)
15844 if (values
.vnode
->next
== NULL
)
15847 values
.vnode
= values
.vnode
->next
;
15848 mpz_set (values
.left
, values
.vnode
->repeat
);
15856 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15862 ar_type mark
= AR_UNKNOWN
;
15864 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15870 if (!gfc_resolve_expr (var
->expr
))
15874 mpz_init_set_si (offset
, 0);
15877 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15878 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15879 e
= e
->value
.function
.actual
->expr
;
15881 if (e
->expr_type
!= EXPR_VARIABLE
)
15883 gfc_error ("Expecting definable entity near %L", where
);
15887 sym
= e
->symtree
->n
.sym
;
15889 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15891 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15892 sym
->name
, &sym
->declared_at
);
15896 if (e
->ref
== NULL
&& sym
->as
)
15898 gfc_error ("DATA array %qs at %L must be specified in a previous"
15899 " declaration", sym
->name
, where
);
15903 if (gfc_is_coindexed (e
))
15905 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15910 has_pointer
= sym
->attr
.pointer
;
15912 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15914 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15919 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
15921 gfc_error ("DATA element %qs at %L is a pointer and so must "
15922 "be a full array", sym
->name
, where
);
15926 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
15928 gfc_error ("DATA object near %L has the pointer attribute "
15929 "and the corresponding DATA value is not a valid "
15930 "initial-data-target", where
);
15936 if (e
->rank
== 0 || has_pointer
)
15938 mpz_init_set_ui (size
, 1);
15945 /* Find the array section reference. */
15946 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15948 if (ref
->type
!= REF_ARRAY
)
15950 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15956 /* Set marks according to the reference pattern. */
15957 switch (ref
->u
.ar
.type
)
15965 /* Get the start position of array section. */
15966 gfc_get_section_index (ar
, section_index
, &offset
);
15971 gcc_unreachable ();
15974 if (!gfc_array_size (e
, &size
))
15976 gfc_error ("Nonconstant array section at %L in DATA statement",
15978 mpz_clear (offset
);
15985 while (mpz_cmp_ui (size
, 0) > 0)
15987 if (!next_data_value ())
15989 gfc_error ("DATA statement at %L has more variables than values",
15995 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15999 /* If we have more than one element left in the repeat count,
16000 and we have more than one element left in the target variable,
16001 then create a range assignment. */
16002 /* FIXME: Only done for full arrays for now, since array sections
16004 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16005 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16009 if (mpz_cmp (size
, values
.left
) >= 0)
16011 mpz_init_set (range
, values
.left
);
16012 mpz_sub (size
, size
, values
.left
);
16013 mpz_set_ui (values
.left
, 0);
16017 mpz_init_set (range
, size
);
16018 mpz_sub (values
.left
, values
.left
, size
);
16019 mpz_set_ui (size
, 0);
16022 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16025 mpz_add (offset
, offset
, range
);
16032 /* Assign initial value to symbol. */
16035 mpz_sub_ui (values
.left
, values
.left
, 1);
16036 mpz_sub_ui (size
, size
, 1);
16038 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16043 if (mark
== AR_FULL
)
16044 mpz_add_ui (offset
, offset
, 1);
16046 /* Modify the array section indexes and recalculate the offset
16047 for next element. */
16048 else if (mark
== AR_SECTION
)
16049 gfc_advance_section (section_index
, ar
, &offset
);
16053 if (mark
== AR_SECTION
)
16055 for (i
= 0; i
< ar
->dimen
; i
++)
16056 mpz_clear (section_index
[i
]);
16060 mpz_clear (offset
);
16066 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16068 /* Iterate over a list of elements in a DATA statement. */
16071 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16074 iterator_stack frame
;
16075 gfc_expr
*e
, *start
, *end
, *step
;
16076 bool retval
= true;
16078 mpz_init (frame
.value
);
16081 start
= gfc_copy_expr (var
->iter
.start
);
16082 end
= gfc_copy_expr (var
->iter
.end
);
16083 step
= gfc_copy_expr (var
->iter
.step
);
16085 if (!gfc_simplify_expr (start
, 1)
16086 || start
->expr_type
!= EXPR_CONSTANT
)
16088 gfc_error ("start of implied-do loop at %L could not be "
16089 "simplified to a constant value", &start
->where
);
16093 if (!gfc_simplify_expr (end
, 1)
16094 || end
->expr_type
!= EXPR_CONSTANT
)
16096 gfc_error ("end of implied-do loop at %L could not be "
16097 "simplified to a constant value", &start
->where
);
16101 if (!gfc_simplify_expr (step
, 1)
16102 || step
->expr_type
!= EXPR_CONSTANT
)
16104 gfc_error ("step of implied-do loop at %L could not be "
16105 "simplified to a constant value", &start
->where
);
16110 mpz_set (trip
, end
->value
.integer
);
16111 mpz_sub (trip
, trip
, start
->value
.integer
);
16112 mpz_add (trip
, trip
, step
->value
.integer
);
16114 mpz_div (trip
, trip
, step
->value
.integer
);
16116 mpz_set (frame
.value
, start
->value
.integer
);
16118 frame
.prev
= iter_stack
;
16119 frame
.variable
= var
->iter
.var
->symtree
;
16120 iter_stack
= &frame
;
16122 while (mpz_cmp_ui (trip
, 0) > 0)
16124 if (!traverse_data_var (var
->list
, where
))
16130 e
= gfc_copy_expr (var
->expr
);
16131 if (!gfc_simplify_expr (e
, 1))
16138 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16140 mpz_sub_ui (trip
, trip
, 1);
16144 mpz_clear (frame
.value
);
16147 gfc_free_expr (start
);
16148 gfc_free_expr (end
);
16149 gfc_free_expr (step
);
16151 iter_stack
= frame
.prev
;
16156 /* Type resolve variables in the variable list of a DATA statement. */
16159 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16163 for (; var
; var
= var
->next
)
16165 if (var
->expr
== NULL
)
16166 t
= traverse_data_list (var
, where
);
16168 t
= check_data_variable (var
, where
);
16178 /* Resolve the expressions and iterators associated with a data statement.
16179 This is separate from the assignment checking because data lists should
16180 only be resolved once. */
16183 resolve_data_variables (gfc_data_variable
*d
)
16185 for (; d
; d
= d
->next
)
16187 if (d
->list
== NULL
)
16189 if (!gfc_resolve_expr (d
->expr
))
16194 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16197 if (!resolve_data_variables (d
->list
))
16206 /* Resolve a single DATA statement. We implement this by storing a pointer to
16207 the value list into static variables, and then recursively traversing the
16208 variables list, expanding iterators and such. */
16211 resolve_data (gfc_data
*d
)
16214 if (!resolve_data_variables (d
->var
))
16217 values
.vnode
= d
->value
;
16218 if (d
->value
== NULL
)
16219 mpz_set_ui (values
.left
, 0);
16221 mpz_set (values
.left
, d
->value
->repeat
);
16223 if (!traverse_data_var (d
->var
, &d
->where
))
16226 /* At this point, we better not have any values left. */
16228 if (next_data_value ())
16229 gfc_error ("DATA statement at %L has more values than variables",
16234 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16235 accessed by host or use association, is a dummy argument to a pure function,
16236 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16237 is storage associated with any such variable, shall not be used in the
16238 following contexts: (clients of this function). */
16240 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16241 procedure. Returns zero if assignment is OK, nonzero if there is a
16244 gfc_impure_variable (gfc_symbol
*sym
)
16249 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16252 /* Check if the symbol's ns is inside the pure procedure. */
16253 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16257 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16261 proc
= sym
->ns
->proc_name
;
16262 if (sym
->attr
.dummy
16263 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16264 || proc
->attr
.function
))
16267 /* TODO: Sort out what can be storage associated, if anything, and include
16268 it here. In principle equivalences should be scanned but it does not
16269 seem to be possible to storage associate an impure variable this way. */
16274 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16275 current namespace is inside a pure procedure. */
16278 gfc_pure (gfc_symbol
*sym
)
16280 symbol_attribute attr
;
16285 /* Check if the current namespace or one of its parents
16286 belongs to a pure procedure. */
16287 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16289 sym
= ns
->proc_name
;
16293 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16301 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16305 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16306 checks if the current namespace is implicitly pure. Note that this
16307 function returns false for a PURE procedure. */
16310 gfc_implicit_pure (gfc_symbol
*sym
)
16316 /* Check if the current procedure is implicit_pure. Walk up
16317 the procedure list until we find a procedure. */
16318 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16320 sym
= ns
->proc_name
;
16324 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16329 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16330 && !sym
->attr
.pure
;
16335 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16341 /* Check if the current procedure is implicit_pure. Walk up
16342 the procedure list until we find a procedure. */
16343 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16345 sym
= ns
->proc_name
;
16349 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16354 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16355 sym
->attr
.implicit_pure
= 0;
16357 sym
->attr
.pure
= 0;
16361 /* Test whether the current procedure is elemental or not. */
16364 gfc_elemental (gfc_symbol
*sym
)
16366 symbol_attribute attr
;
16369 sym
= gfc_current_ns
->proc_name
;
16374 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16378 /* Warn about unused labels. */
16381 warn_unused_fortran_label (gfc_st_label
*label
)
16386 warn_unused_fortran_label (label
->left
);
16388 if (label
->defined
== ST_LABEL_UNKNOWN
)
16391 switch (label
->referenced
)
16393 case ST_LABEL_UNKNOWN
:
16394 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16395 label
->value
, &label
->where
);
16398 case ST_LABEL_BAD_TARGET
:
16399 gfc_warning (OPT_Wunused_label
,
16400 "Label %d at %L defined but cannot be used",
16401 label
->value
, &label
->where
);
16408 warn_unused_fortran_label (label
->right
);
16412 /* Returns the sequence type of a symbol or sequence. */
16415 sequence_type (gfc_typespec ts
)
16424 if (ts
.u
.derived
->components
== NULL
)
16425 return SEQ_NONDEFAULT
;
16427 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16428 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16429 if (sequence_type (c
->ts
) != result
)
16435 if (ts
.kind
!= gfc_default_character_kind
)
16436 return SEQ_NONDEFAULT
;
16438 return SEQ_CHARACTER
;
16441 if (ts
.kind
!= gfc_default_integer_kind
)
16442 return SEQ_NONDEFAULT
;
16444 return SEQ_NUMERIC
;
16447 if (!(ts
.kind
== gfc_default_real_kind
16448 || ts
.kind
== gfc_default_double_kind
))
16449 return SEQ_NONDEFAULT
;
16451 return SEQ_NUMERIC
;
16454 if (ts
.kind
!= gfc_default_complex_kind
)
16455 return SEQ_NONDEFAULT
;
16457 return SEQ_NUMERIC
;
16460 if (ts
.kind
!= gfc_default_logical_kind
)
16461 return SEQ_NONDEFAULT
;
16463 return SEQ_NUMERIC
;
16466 return SEQ_NONDEFAULT
;
16471 /* Resolve derived type EQUIVALENCE object. */
16474 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16476 gfc_component
*c
= derived
->components
;
16481 /* Shall not be an object of nonsequence derived type. */
16482 if (!derived
->attr
.sequence
)
16484 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16485 "attribute to be an EQUIVALENCE object", sym
->name
,
16490 /* Shall not have allocatable components. */
16491 if (derived
->attr
.alloc_comp
)
16493 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16494 "components to be an EQUIVALENCE object",sym
->name
,
16499 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16501 gfc_error ("Derived type variable %qs at %L with default "
16502 "initialization cannot be in EQUIVALENCE with a variable "
16503 "in COMMON", sym
->name
, &e
->where
);
16507 for (; c
; c
= c
->next
)
16509 if (gfc_bt_struct (c
->ts
.type
)
16510 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16513 /* Shall not be an object of sequence derived type containing a pointer
16514 in the structure. */
16515 if (c
->attr
.pointer
)
16517 gfc_error ("Derived type variable %qs at %L with pointer "
16518 "component(s) cannot be an EQUIVALENCE object",
16519 sym
->name
, &e
->where
);
16527 /* Resolve equivalence object.
16528 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16529 an allocatable array, an object of nonsequence derived type, an object of
16530 sequence derived type containing a pointer at any level of component
16531 selection, an automatic object, a function name, an entry name, a result
16532 name, a named constant, a structure component, or a subobject of any of
16533 the preceding objects. A substring shall not have length zero. A
16534 derived type shall not have components with default initialization nor
16535 shall two objects of an equivalence group be initialized.
16536 Either all or none of the objects shall have an protected attribute.
16537 The simple constraints are done in symbol.c(check_conflict) and the rest
16538 are implemented here. */
16541 resolve_equivalence (gfc_equiv
*eq
)
16544 gfc_symbol
*first_sym
;
16547 locus
*last_where
= NULL
;
16548 seq_type eq_type
, last_eq_type
;
16549 gfc_typespec
*last_ts
;
16550 int object
, cnt_protected
;
16553 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16555 first_sym
= eq
->expr
->symtree
->n
.sym
;
16559 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16563 e
->ts
= e
->symtree
->n
.sym
->ts
;
16564 /* match_varspec might not know yet if it is seeing
16565 array reference or substring reference, as it doesn't
16567 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16569 gfc_ref
*ref
= e
->ref
;
16570 sym
= e
->symtree
->n
.sym
;
16572 if (sym
->attr
.dimension
)
16574 ref
->u
.ar
.as
= sym
->as
;
16578 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16579 if (e
->ts
.type
== BT_CHARACTER
16581 && ref
->type
== REF_ARRAY
16582 && ref
->u
.ar
.dimen
== 1
16583 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16584 && ref
->u
.ar
.stride
[0] == NULL
)
16586 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16587 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16590 /* Optimize away the (:) reference. */
16591 if (start
== NULL
&& end
== NULL
)
16594 e
->ref
= ref
->next
;
16596 e
->ref
->next
= ref
->next
;
16601 ref
->type
= REF_SUBSTRING
;
16603 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16605 ref
->u
.ss
.start
= start
;
16606 if (end
== NULL
&& e
->ts
.u
.cl
)
16607 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16608 ref
->u
.ss
.end
= end
;
16609 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16616 /* Any further ref is an error. */
16619 gcc_assert (ref
->type
== REF_ARRAY
);
16620 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16626 if (!gfc_resolve_expr (e
))
16629 sym
= e
->symtree
->n
.sym
;
16631 if (sym
->attr
.is_protected
)
16633 if (cnt_protected
> 0 && cnt_protected
!= object
)
16635 gfc_error ("Either all or none of the objects in the "
16636 "EQUIVALENCE set at %L shall have the "
16637 "PROTECTED attribute",
16642 /* Shall not equivalence common block variables in a PURE procedure. */
16643 if (sym
->ns
->proc_name
16644 && sym
->ns
->proc_name
->attr
.pure
16645 && sym
->attr
.in_common
)
16647 /* Need to check for symbols that may have entered the pure
16648 procedure via a USE statement. */
16649 bool saw_sym
= false;
16650 if (sym
->ns
->use_stmts
)
16653 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16654 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16660 gfc_error ("COMMON block member %qs at %L cannot be an "
16661 "EQUIVALENCE object in the pure procedure %qs",
16662 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16666 /* Shall not be a named constant. */
16667 if (e
->expr_type
== EXPR_CONSTANT
)
16669 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16670 "object", sym
->name
, &e
->where
);
16674 if (e
->ts
.type
== BT_DERIVED
16675 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16678 /* Check that the types correspond correctly:
16680 A numeric sequence structure may be equivalenced to another sequence
16681 structure, an object of default integer type, default real type, double
16682 precision real type, default logical type such that components of the
16683 structure ultimately only become associated to objects of the same
16684 kind. A character sequence structure may be equivalenced to an object
16685 of default character kind or another character sequence structure.
16686 Other objects may be equivalenced only to objects of the same type and
16687 kind parameters. */
16689 /* Identical types are unconditionally OK. */
16690 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16691 goto identical_types
;
16693 last_eq_type
= sequence_type (*last_ts
);
16694 eq_type
= sequence_type (sym
->ts
);
16696 /* Since the pair of objects is not of the same type, mixed or
16697 non-default sequences can be rejected. */
16699 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16700 "statement at %L with different type objects";
16702 && last_eq_type
== SEQ_MIXED
16703 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16704 || (eq_type
== SEQ_MIXED
16705 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16708 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16709 "statement at %L with objects of different type";
16711 && last_eq_type
== SEQ_NONDEFAULT
16712 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16713 || (eq_type
== SEQ_NONDEFAULT
16714 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16717 msg
="Non-CHARACTER object %qs in default CHARACTER "
16718 "EQUIVALENCE statement at %L";
16719 if (last_eq_type
== SEQ_CHARACTER
16720 && eq_type
!= SEQ_CHARACTER
16721 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16724 msg
="Non-NUMERIC object %qs in default NUMERIC "
16725 "EQUIVALENCE statement at %L";
16726 if (last_eq_type
== SEQ_NUMERIC
16727 && eq_type
!= SEQ_NUMERIC
16728 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16733 last_where
= &e
->where
;
16738 /* Shall not be an automatic array. */
16739 if (e
->ref
->type
== REF_ARRAY
16740 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16742 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16743 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16750 /* Shall not be a structure component. */
16751 if (r
->type
== REF_COMPONENT
)
16753 gfc_error ("Structure component %qs at %L cannot be an "
16754 "EQUIVALENCE object",
16755 r
->u
.c
.component
->name
, &e
->where
);
16759 /* A substring shall not have length zero. */
16760 if (r
->type
== REF_SUBSTRING
)
16762 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16764 gfc_error ("Substring at %L has length zero",
16765 &r
->u
.ss
.start
->where
);
16775 /* Function called by resolve_fntype to flag other symbol used in the
16776 length type parameter specification of function resuls. */
16779 flag_fn_result_spec (gfc_expr
*expr
,
16781 int *f ATTRIBUTE_UNUSED
)
16786 if (expr
->expr_type
== EXPR_VARIABLE
)
16788 s
= expr
->symtree
->n
.sym
;
16789 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16795 gfc_error ("Self reference in character length expression "
16796 "for %qs at %L", sym
->name
, &expr
->where
);
16800 if (!s
->fn_result_spec
16801 && s
->attr
.flavor
== FL_PARAMETER
)
16803 /* Function contained in a module.... */
16804 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16807 s
->fn_result_spec
= 1;
16808 /* Make sure that this symbol is translated as a module
16810 st
= gfc_get_unique_symtree (ns
);
16814 /* ... which is use associated and called. */
16815 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16817 /* External function matched with an interface. */
16820 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16821 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16822 && s
->ns
->proc_name
->attr
.function
))
16823 s
->fn_result_spec
= 1;
16830 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16833 resolve_fntype (gfc_namespace
*ns
)
16835 gfc_entry_list
*el
;
16838 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16841 /* If there are any entries, ns->proc_name is the entry master
16842 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16844 sym
= ns
->entries
->sym
;
16846 sym
= ns
->proc_name
;
16847 if (sym
->result
== sym
16848 && sym
->ts
.type
== BT_UNKNOWN
16849 && !gfc_set_default_type (sym
, 0, NULL
)
16850 && !sym
->attr
.untyped
)
16852 gfc_error ("Function %qs at %L has no IMPLICIT type",
16853 sym
->name
, &sym
->declared_at
);
16854 sym
->attr
.untyped
= 1;
16857 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16858 && !sym
->attr
.contained
16859 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16860 && gfc_check_symbol_access (sym
))
16862 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16863 "%L of PRIVATE type %qs", sym
->name
,
16864 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16868 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16870 if (el
->sym
->result
== el
->sym
16871 && el
->sym
->ts
.type
== BT_UNKNOWN
16872 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16873 && !el
->sym
->attr
.untyped
)
16875 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16876 el
->sym
->name
, &el
->sym
->declared_at
);
16877 el
->sym
->attr
.untyped
= 1;
16881 if (sym
->ts
.type
== BT_CHARACTER
)
16882 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16886 /* 12.3.2.1.1 Defined operators. */
16889 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16891 gfc_formal_arglist
*formal
;
16893 if (!sym
->attr
.function
)
16895 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16896 sym
->name
, &where
);
16900 if (sym
->ts
.type
== BT_CHARACTER
16901 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16902 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16903 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16905 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16906 "character length", sym
->name
, &where
);
16910 formal
= gfc_sym_get_dummy_args (sym
);
16911 if (!formal
|| !formal
->sym
)
16913 gfc_error ("User operator procedure %qs at %L must have at least "
16914 "one argument", sym
->name
, &where
);
16918 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16920 gfc_error ("First argument of operator interface at %L must be "
16921 "INTENT(IN)", &where
);
16925 if (formal
->sym
->attr
.optional
)
16927 gfc_error ("First argument of operator interface at %L cannot be "
16928 "optional", &where
);
16932 formal
= formal
->next
;
16933 if (!formal
|| !formal
->sym
)
16936 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16938 gfc_error ("Second argument of operator interface at %L must be "
16939 "INTENT(IN)", &where
);
16943 if (formal
->sym
->attr
.optional
)
16945 gfc_error ("Second argument of operator interface at %L cannot be "
16946 "optional", &where
);
16952 gfc_error ("Operator interface at %L must have, at most, two "
16953 "arguments", &where
);
16961 gfc_resolve_uops (gfc_symtree
*symtree
)
16963 gfc_interface
*itr
;
16965 if (symtree
== NULL
)
16968 gfc_resolve_uops (symtree
->left
);
16969 gfc_resolve_uops (symtree
->right
);
16971 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16972 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16976 /* Examine all of the expressions associated with a program unit,
16977 assign types to all intermediate expressions, make sure that all
16978 assignments are to compatible types and figure out which names
16979 refer to which functions or subroutines. It doesn't check code
16980 block, which is handled by gfc_resolve_code. */
16983 resolve_types (gfc_namespace
*ns
)
16989 gfc_namespace
* old_ns
= gfc_current_ns
;
16991 if (ns
->types_resolved
)
16994 /* Check that all IMPLICIT types are ok. */
16995 if (!ns
->seen_implicit_none
)
16998 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16999 if (ns
->set_flag
[letter
]
17000 && !resolve_typespec_used (&ns
->default_type
[letter
],
17001 &ns
->implicit_loc
[letter
], NULL
))
17005 gfc_current_ns
= ns
;
17007 resolve_entries (ns
);
17009 resolve_common_vars (&ns
->blank_common
, false);
17010 resolve_common_blocks (ns
->common_root
);
17012 resolve_contained_functions (ns
);
17014 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17015 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17016 resolve_formal_arglist (ns
->proc_name
);
17018 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17020 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17021 resolve_charlen (cl
);
17023 gfc_traverse_ns (ns
, resolve_symbol
);
17025 resolve_fntype (ns
);
17027 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17029 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17030 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17031 "also be PURE", n
->proc_name
->name
,
17032 &n
->proc_name
->declared_at
);
17038 gfc_do_concurrent_flag
= 0;
17039 gfc_check_interfaces (ns
);
17041 gfc_traverse_ns (ns
, resolve_values
);
17043 if (ns
->save_all
|| !flag_automatic
)
17047 for (d
= ns
->data
; d
; d
= d
->next
)
17051 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17053 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17055 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17056 resolve_equivalence (eq
);
17058 /* Warn about unused labels. */
17059 if (warn_unused_label
)
17060 warn_unused_fortran_label (ns
->st_labels
);
17062 gfc_resolve_uops (ns
->uop_root
);
17064 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17066 gfc_resolve_omp_declare_simd (ns
);
17068 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17070 ns
->types_resolved
= 1;
17072 gfc_current_ns
= old_ns
;
17076 /* Call gfc_resolve_code recursively. */
17079 resolve_codes (gfc_namespace
*ns
)
17082 bitmap_obstack old_obstack
;
17084 if (ns
->resolved
== 1)
17087 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17090 gfc_current_ns
= ns
;
17092 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17093 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17096 /* Set to an out of range value. */
17097 current_entry_id
= -1;
17099 old_obstack
= labels_obstack
;
17100 bitmap_obstack_initialize (&labels_obstack
);
17102 gfc_resolve_oacc_declare (ns
);
17103 gfc_resolve_oacc_routines (ns
);
17104 gfc_resolve_omp_local_vars (ns
);
17105 gfc_resolve_code (ns
->code
, ns
);
17107 bitmap_obstack_release (&labels_obstack
);
17108 labels_obstack
= old_obstack
;
17112 /* This function is called after a complete program unit has been compiled.
17113 Its purpose is to examine all of the expressions associated with a program
17114 unit, assign types to all intermediate expressions, make sure that all
17115 assignments are to compatible types and figure out which names refer to
17116 which functions or subroutines. */
17119 gfc_resolve (gfc_namespace
*ns
)
17121 gfc_namespace
*old_ns
;
17122 code_stack
*old_cs_base
;
17123 struct gfc_omp_saved_state old_omp_state
;
17129 old_ns
= gfc_current_ns
;
17130 old_cs_base
= cs_base
;
17132 /* As gfc_resolve can be called during resolution of an OpenMP construct
17133 body, we should clear any state associated to it, so that say NS's
17134 DO loops are not interpreted as OpenMP loops. */
17135 if (!ns
->construct_entities
)
17136 gfc_omp_save_and_clear_state (&old_omp_state
);
17138 resolve_types (ns
);
17139 component_assignment_level
= 0;
17140 resolve_codes (ns
);
17142 gfc_current_ns
= old_ns
;
17143 cs_base
= old_cs_base
;
17146 gfc_run_passes (ns
);
17148 if (!ns
->construct_entities
)
17149 gfc_omp_restore_state (&old_omp_state
);