1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2020 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 gfc_resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 gfc_resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 gfc_resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
589 /* Try to find out of what the return type is. */
590 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
592 t
= gfc_set_default_type (sym
->result
, 0, ns
);
594 if (!t
&& !sym
->result
->attr
.untyped
)
596 if (sym
->result
== sym
)
597 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
598 sym
->name
, &sym
->declared_at
);
599 else if (!sym
->result
->attr
.proc_pointer
)
600 gfc_error ("Result %qs of contained function %qs at %L has "
601 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
602 &sym
->result
->declared_at
);
603 sym
->result
->attr
.untyped
= 1;
607 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
608 type, lists the only ways a character length value of * can be used:
609 dummy arguments of procedures, named constants, function results and
610 in allocate statements if the allocate_object is an assumed length dummy
611 in external functions. Internal function results and results of module
612 procedures are not on this list, ergo, not permitted. */
614 if (sym
->result
->ts
.type
== BT_CHARACTER
)
616 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
617 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
619 /* See if this is a module-procedure and adapt error message
622 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
623 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
625 gfc_error (module_proc
626 ? G_("Character-valued module procedure %qs at %L"
627 " must not be assumed length")
628 : G_("Character-valued internal function %qs at %L"
629 " must not be assumed length"),
630 sym
->name
, &sym
->declared_at
);
636 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
637 introduce duplicates. */
640 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
642 gfc_formal_arglist
*f
, *new_arglist
;
645 for (; new_args
!= NULL
; new_args
= new_args
->next
)
647 new_sym
= new_args
->sym
;
648 /* See if this arg is already in the formal argument list. */
649 for (f
= proc
->formal
; f
; f
= f
->next
)
651 if (new_sym
== f
->sym
)
658 /* Add a new argument. Argument order is not important. */
659 new_arglist
= gfc_get_formal_arglist ();
660 new_arglist
->sym
= new_sym
;
661 new_arglist
->next
= proc
->formal
;
662 proc
->formal
= new_arglist
;
667 /* Flag the arguments that are not present in all entries. */
670 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
672 gfc_formal_arglist
*f
, *head
;
675 for (f
= proc
->formal
; f
; f
= f
->next
)
680 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
682 if (new_args
->sym
== f
->sym
)
689 f
->sym
->attr
.not_always_present
= 1;
694 /* Resolve alternate entry points. If a symbol has multiple entry points we
695 create a new master symbol for the main routine, and turn the existing
696 symbol into an entry point. */
699 resolve_entries (gfc_namespace
*ns
)
701 gfc_namespace
*old_ns
;
705 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
706 static int master_count
= 0;
708 if (ns
->proc_name
== NULL
)
711 /* No need to do anything if this procedure doesn't have alternate entry
716 /* We may already have resolved alternate entry points. */
717 if (ns
->proc_name
->attr
.entry_master
)
720 /* If this isn't a procedure something has gone horribly wrong. */
721 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
723 /* Remember the current namespace. */
724 old_ns
= gfc_current_ns
;
728 /* Add the main entry point to the list of entry points. */
729 el
= gfc_get_entry_list ();
730 el
->sym
= ns
->proc_name
;
732 el
->next
= ns
->entries
;
734 ns
->proc_name
->attr
.entry
= 1;
736 /* If it is a module function, it needs to be in the right namespace
737 so that gfc_get_fake_result_decl can gather up the results. The
738 need for this arose in get_proc_name, where these beasts were
739 left in their own namespace, to keep prior references linked to
740 the entry declaration.*/
741 if (ns
->proc_name
->attr
.function
742 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
745 /* Do the same for entries where the master is not a module
746 procedure. These are retained in the module namespace because
747 of the module procedure declaration. */
748 for (el
= el
->next
; el
; el
= el
->next
)
749 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
750 && el
->sym
->attr
.mod_proc
)
754 /* Add an entry statement for it. */
755 c
= gfc_get_code (EXEC_ENTRY
);
760 /* Create a new symbol for the master function. */
761 /* Give the internal function a unique name (within this file).
762 Also include the function name so the user has some hope of figuring
763 out what is going on. */
764 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
765 master_count
++, ns
->proc_name
->name
);
766 gfc_get_ha_symbol (name
, &proc
);
767 gcc_assert (proc
!= NULL
);
769 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
770 if (ns
->proc_name
->attr
.subroutine
)
771 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
775 gfc_typespec
*ts
, *fts
;
776 gfc_array_spec
*as
, *fas
;
777 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
779 fas
= ns
->entries
->sym
->as
;
780 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
781 fts
= &ns
->entries
->sym
->result
->ts
;
782 if (fts
->type
== BT_UNKNOWN
)
783 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
784 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
786 ts
= &el
->sym
->result
->ts
;
788 as
= as
? as
: el
->sym
->result
->as
;
789 if (ts
->type
== BT_UNKNOWN
)
790 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
792 if (! gfc_compare_types (ts
, fts
)
793 || (el
->sym
->result
->attr
.dimension
794 != ns
->entries
->sym
->result
->attr
.dimension
)
795 || (el
->sym
->result
->attr
.pointer
796 != ns
->entries
->sym
->result
->attr
.pointer
))
798 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
799 && gfc_compare_array_spec (as
, fas
) == 0)
800 gfc_error ("Function %s at %L has entries with mismatched "
801 "array specifications", ns
->entries
->sym
->name
,
802 &ns
->entries
->sym
->declared_at
);
803 /* The characteristics need to match and thus both need to have
804 the same string length, i.e. both len=*, or both len=4.
805 Having both len=<variable> is also possible, but difficult to
806 check at compile time. */
807 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
808 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
809 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
811 && ts
->u
.cl
->length
->expr_type
812 != fts
->u
.cl
->length
->expr_type
)
814 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
815 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
816 fts
->u
.cl
->length
->value
.integer
) != 0)))
817 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
818 "entries returning variables of different "
819 "string lengths", ns
->entries
->sym
->name
,
820 &ns
->entries
->sym
->declared_at
);
825 sym
= ns
->entries
->sym
->result
;
826 /* All result types the same. */
828 if (sym
->attr
.dimension
)
829 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
830 if (sym
->attr
.pointer
)
831 gfc_add_pointer (&proc
->attr
, NULL
);
835 /* Otherwise the result will be passed through a union by
837 proc
->attr
.mixed_entry_master
= 1;
838 for (el
= ns
->entries
; el
; el
= el
->next
)
840 sym
= el
->sym
->result
;
841 if (sym
->attr
.dimension
)
843 if (el
== ns
->entries
)
844 gfc_error ("FUNCTION result %s cannot be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 gfc_error ("ENTRY result %s cannot be an array in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 else if (sym
->attr
.pointer
)
854 if (el
== ns
->entries
)
855 gfc_error ("FUNCTION result %s cannot be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 gfc_error ("ENTRY result %s cannot be a POINTER in "
860 "FUNCTION %s at %L", sym
->name
,
861 ns
->entries
->sym
->name
, &sym
->declared_at
);
866 if (ts
->type
== BT_UNKNOWN
)
867 ts
= gfc_get_default_type (sym
->name
, NULL
);
871 if (ts
->kind
== gfc_default_integer_kind
)
875 if (ts
->kind
== gfc_default_real_kind
876 || ts
->kind
== gfc_default_double_kind
)
880 if (ts
->kind
== gfc_default_complex_kind
)
884 if (ts
->kind
== gfc_default_logical_kind
)
888 /* We will issue error elsewhere. */
896 if (el
== ns
->entries
)
897 gfc_error ("FUNCTION result %s cannot be of type %s "
898 "in FUNCTION %s at %L", sym
->name
,
899 gfc_typename (ts
), ns
->entries
->sym
->name
,
902 gfc_error ("ENTRY result %s cannot be of type %s "
903 "in FUNCTION %s at %L", sym
->name
,
904 gfc_typename (ts
), ns
->entries
->sym
->name
,
911 proc
->attr
.access
= ACCESS_PRIVATE
;
912 proc
->attr
.entry_master
= 1;
914 /* Merge all the entry point arguments. */
915 for (el
= ns
->entries
; el
; el
= el
->next
)
916 merge_argument_lists (proc
, el
->sym
->formal
);
918 /* Check the master formal arguments for any that are not
919 present in all entry points. */
920 for (el
= ns
->entries
; el
; el
= el
->next
)
921 check_argument_lists (proc
, el
->sym
->formal
);
923 /* Use the master function for the function body. */
924 ns
->proc_name
= proc
;
926 /* Finalize the new symbols. */
927 gfc_commit_symbols ();
929 /* Restore the original namespace. */
930 gfc_current_ns
= old_ns
;
934 /* Resolve common variables. */
936 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
938 gfc_symbol
*csym
= common_block
->head
;
940 for (; csym
; csym
= csym
->common_next
)
942 /* gfc_add_in_common may have been called before, but the reported errors
943 have been ignored to continue parsing.
944 We do the checks again here. */
945 if (!csym
->attr
.use_assoc
)
947 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
948 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
949 &common_block
->where
);
952 if (csym
->value
|| csym
->attr
.data
)
954 if (!csym
->ns
->is_block_data
)
955 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
956 "but only in BLOCK DATA initialization is "
957 "allowed", csym
->name
, &csym
->declared_at
);
958 else if (!named_common
)
959 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
960 "in a blank COMMON but initialization is only "
961 "allowed in named common blocks", csym
->name
,
965 if (UNLIMITED_POLY (csym
))
966 gfc_error_now ("%qs in cannot appear in COMMON at %L "
967 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.type
!= BT_DERIVED
)
972 if (!(csym
->ts
.u
.derived
->attr
.sequence
973 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "has neither the SEQUENCE nor the BIND(C) "
976 "attribute", csym
->name
, &csym
->declared_at
);
977 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
978 gfc_error_now ("Derived type variable %qs in COMMON at %L "
979 "has an ultimate component that is "
980 "allocatable", csym
->name
, &csym
->declared_at
);
981 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
982 gfc_error_now ("Derived type variable %qs in COMMON at %L "
983 "may not have default initializer", csym
->name
,
986 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
987 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
991 /* Resolve common blocks. */
993 resolve_common_blocks (gfc_symtree
*common_root
)
998 if (common_root
== NULL
)
1001 if (common_root
->left
)
1002 resolve_common_blocks (common_root
->left
);
1003 if (common_root
->right
)
1004 resolve_common_blocks (common_root
->right
);
1006 resolve_common_vars (common_root
->n
.common
, true);
1008 /* The common name is a global name - in Fortran 2003 also if it has a
1009 C binding name, since Fortran 2008 only the C binding name is a global
1011 if (!common_root
->n
.common
->binding_label
1012 || gfc_notification_std (GFC_STD_F2008
))
1014 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1015 common_root
->n
.common
->name
);
1017 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1018 && gsym
->type
== GSYM_COMMON
1019 && ((common_root
->n
.common
->binding_label
1020 && (!gsym
->binding_label
1021 || strcmp (common_root
->n
.common
->binding_label
,
1022 gsym
->binding_label
) != 0))
1023 || (!common_root
->n
.common
->binding_label
1024 && gsym
->binding_label
)))
1026 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1027 "identifier and must thus have the same binding name "
1028 "as the same-named COMMON block at %L: %s vs %s",
1029 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1031 common_root
->n
.common
->binding_label
1032 ? common_root
->n
.common
->binding_label
: "(blank)",
1033 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1037 if (gsym
&& gsym
->type
!= GSYM_COMMON
1038 && !common_root
->n
.common
->binding_label
)
1040 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1042 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1046 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1048 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1049 "%L sharing the identifier with global non-COMMON-block "
1050 "entity at %L", common_root
->n
.common
->name
,
1051 &common_root
->n
.common
->where
, &gsym
->where
);
1056 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
, false);
1057 gsym
->type
= GSYM_COMMON
;
1058 gsym
->where
= common_root
->n
.common
->where
;
1064 if (common_root
->n
.common
->binding_label
)
1066 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1067 common_root
->n
.common
->binding_label
);
1068 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1070 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1071 "global identifier as entity at %L",
1072 &common_root
->n
.common
->where
,
1073 common_root
->n
.common
->binding_label
, &gsym
->where
);
1078 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
, true);
1079 gsym
->type
= GSYM_COMMON
;
1080 gsym
->where
= common_root
->n
.common
->where
;
1086 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1090 if (sym
->attr
.flavor
== FL_PARAMETER
)
1091 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1092 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1094 if (sym
->attr
.external
)
1095 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1096 sym
->name
, &common_root
->n
.common
->where
);
1098 if (sym
->attr
.intrinsic
)
1099 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1100 sym
->name
, &common_root
->n
.common
->where
);
1101 else if (sym
->attr
.result
1102 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1103 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1104 "that is also a function result", sym
->name
,
1105 &common_root
->n
.common
->where
);
1106 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1107 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1108 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1109 "that is also a global procedure", sym
->name
,
1110 &common_root
->n
.common
->where
);
1114 /* Resolve contained function types. Because contained functions can call one
1115 another, they have to be worked out before any of the contained procedures
1118 The good news is that if a function doesn't already have a type, the only
1119 way it can get one is through an IMPLICIT type or a RESULT variable, because
1120 by definition contained functions are contained namespace they're contained
1121 in, not in a sibling or parent namespace. */
1124 resolve_contained_functions (gfc_namespace
*ns
)
1126 gfc_namespace
*child
;
1129 resolve_formal_arglists (ns
);
1131 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1133 /* Resolve alternate entry points first. */
1134 resolve_entries (child
);
1136 /* Then check function return types. */
1137 resolve_contained_fntype (child
->proc_name
, child
);
1138 for (el
= child
->entries
; el
; el
= el
->next
)
1139 resolve_contained_fntype (el
->sym
, child
);
1145 /* A Parameterized Derived Type constructor must contain values for
1146 the PDT KIND parameters or they must have a default initializer.
1147 Go through the constructor picking out the KIND expressions,
1148 storing them in 'param_list' and then call gfc_get_pdt_instance
1149 to obtain the PDT instance. */
1151 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1154 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1156 param
= gfc_get_actual_arglist ();
1158 param_list
= param_tail
= param
;
1161 param_tail
->next
= param
;
1162 param_tail
= param_tail
->next
;
1165 param_tail
->name
= c
->name
;
1167 param_tail
->expr
= gfc_copy_expr (expr
);
1168 else if (c
->initializer
)
1169 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1172 param_tail
->spec_type
= SPEC_ASSUMED
;
1173 if (c
->attr
.pdt_kind
)
1175 gfc_error ("The KIND parameter %qs in the PDT constructor "
1176 "at %C has no value", param
->name
);
1185 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1186 gfc_symbol
*derived
)
1188 gfc_constructor
*cons
= NULL
;
1189 gfc_component
*comp
;
1192 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1193 cons
= gfc_constructor_first (expr
->value
.constructor
);
1198 comp
= derived
->components
;
1200 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1203 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1204 && comp
->ts
.type
== BT_DERIVED
)
1206 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1210 else if (comp
->ts
.type
== BT_DERIVED
)
1212 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1216 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1217 && derived
->attr
.pdt_template
)
1219 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1228 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1229 static bool resolve_fl_struct (gfc_symbol
*sym
);
1232 /* Resolve all of the elements of a structure constructor and make sure that
1233 the types are correct. The 'init' flag indicates that the given
1234 constructor is an initializer. */
1237 resolve_structure_cons (gfc_expr
*expr
, int init
)
1239 gfc_constructor
*cons
;
1240 gfc_component
*comp
;
1246 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1248 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1249 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1251 resolve_fl_struct (expr
->ts
.u
.derived
);
1253 /* If this is a Parameterized Derived Type template, find the
1254 instance corresponding to the PDT kind parameters. */
1255 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1258 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1261 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1263 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1266 gfc_free_actual_arglist (param_list
);
1268 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1273 cons
= gfc_constructor_first (expr
->value
.constructor
);
1275 /* A constructor may have references if it is the result of substituting a
1276 parameter variable. In this case we just pull out the component we
1279 comp
= expr
->ref
->u
.c
.sym
->components
;
1281 comp
= expr
->ts
.u
.derived
->components
;
1283 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1290 /* Unions use an EXPR_NULL contrived expression to tell the translation
1291 phase to generate an initializer of the appropriate length.
1293 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1296 if (!gfc_resolve_expr (cons
->expr
))
1302 rank
= comp
->as
? comp
->as
->rank
: 0;
1303 if (comp
->ts
.type
== BT_CLASS
1304 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1305 && CLASS_DATA (comp
)->as
)
1306 rank
= CLASS_DATA (comp
)->as
->rank
;
1308 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1309 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1311 gfc_error ("The rank of the element in the structure "
1312 "constructor at %L does not match that of the "
1313 "component (%d/%d)", &cons
->expr
->where
,
1314 cons
->expr
->rank
, rank
);
1318 /* If we don't have the right type, try to convert it. */
1320 if (!comp
->attr
.proc_pointer
&&
1321 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1323 if (strcmp (comp
->name
, "_extends") == 0)
1325 /* Can afford to be brutal with the _extends initializer.
1326 The derived type can get lost because it is PRIVATE
1327 but it is not usage constrained by the standard. */
1328 cons
->expr
->ts
= comp
->ts
;
1330 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs, is %s but should be %s",
1334 &cons
->expr
->where
, comp
->name
,
1335 gfc_basic_typename (cons
->expr
->ts
.type
),
1336 gfc_basic_typename (comp
->ts
.type
));
1341 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1347 /* For strings, the length of the constructor should be the same as
1348 the one of the structure, ensure this if the lengths are known at
1349 compile time and when we are dealing with PARAMETER or structure
1351 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1352 && comp
->ts
.u
.cl
->length
1353 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1354 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1355 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1356 && cons
->expr
->rank
!= 0
1357 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1358 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1360 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1361 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1363 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1364 to make use of the gfc_resolve_character_array_constructor
1365 machinery. The expression is later simplified away to
1366 an array of string literals. */
1367 gfc_expr
*para
= cons
->expr
;
1368 cons
->expr
= gfc_get_expr ();
1369 cons
->expr
->ts
= para
->ts
;
1370 cons
->expr
->where
= para
->where
;
1371 cons
->expr
->expr_type
= EXPR_ARRAY
;
1372 cons
->expr
->rank
= para
->rank
;
1373 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1374 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1375 para
, &cons
->expr
->where
);
1378 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1380 /* Rely on the cleanup of the namespace to deal correctly with
1381 the old charlen. (There was a block here that attempted to
1382 remove the charlen but broke the chain in so doing.) */
1383 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1384 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1385 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1386 gfc_resolve_character_array_constructor (cons
->expr
);
1390 if (cons
->expr
->expr_type
== EXPR_NULL
1391 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1392 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1393 || (comp
->ts
.type
== BT_CLASS
1394 && (CLASS_DATA (comp
)->attr
.class_pointer
1395 || CLASS_DATA (comp
)->attr
.allocatable
))))
1398 gfc_error ("The NULL in the structure constructor at %L is "
1399 "being applied to component %qs, which is neither "
1400 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1404 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1406 /* Check procedure pointer interface. */
1407 gfc_symbol
*s2
= NULL
;
1412 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1415 s2
= c2
->ts
.interface
;
1418 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1420 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1421 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1423 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1425 s2
= cons
->expr
->symtree
->n
.sym
;
1426 name
= cons
->expr
->symtree
->n
.sym
->name
;
1429 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1430 err
, sizeof (err
), NULL
, NULL
))
1432 gfc_error_opt (0, "Interface mismatch for procedure-pointer "
1433 "component %qs in structure constructor at %L:"
1434 " %s", comp
->name
, &cons
->expr
->where
, err
);
1439 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1440 || cons
->expr
->expr_type
== EXPR_NULL
)
1443 a
= gfc_expr_attr (cons
->expr
);
1445 if (!a
.pointer
&& !a
.target
)
1448 gfc_error ("The element in the structure constructor at %L, "
1449 "for pointer component %qs should be a POINTER or "
1450 "a TARGET", &cons
->expr
->where
, comp
->name
);
1455 /* F08:C461. Additional checks for pointer initialization. */
1459 gfc_error ("Pointer initialization target at %L "
1460 "must not be ALLOCATABLE", &cons
->expr
->where
);
1465 gfc_error ("Pointer initialization target at %L "
1466 "must have the SAVE attribute", &cons
->expr
->where
);
1470 /* F2003, C1272 (3). */
1471 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1472 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1473 || gfc_is_coindexed (cons
->expr
));
1474 if (impure
&& gfc_pure (NULL
))
1477 gfc_error ("Invalid expression in the structure constructor for "
1478 "pointer component %qs at %L in PURE procedure",
1479 comp
->name
, &cons
->expr
->where
);
1483 gfc_unset_implicit_pure (NULL
);
1490 /****************** Expression name resolution ******************/
1492 /* Returns 0 if a symbol was not declared with a type or
1493 attribute declaration statement, nonzero otherwise. */
1496 was_declared (gfc_symbol
*sym
)
1502 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1505 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1506 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1507 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1508 || a
.asynchronous
|| a
.codimension
)
1515 /* Determine if a symbol is generic or not. */
1518 generic_sym (gfc_symbol
*sym
)
1522 if (sym
->attr
.generic
||
1523 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1526 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1529 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1536 return generic_sym (s
);
1543 /* Determine if a symbol is specific or not. */
1546 specific_sym (gfc_symbol
*sym
)
1550 if (sym
->attr
.if_source
== IFSRC_IFBODY
1551 || sym
->attr
.proc
== PROC_MODULE
1552 || sym
->attr
.proc
== PROC_INTERNAL
1553 || sym
->attr
.proc
== PROC_ST_FUNCTION
1554 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1555 || sym
->attr
.external
)
1558 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1561 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1563 return (s
== NULL
) ? 0 : specific_sym (s
);
1567 /* Figure out if the procedure is specific, generic or unknown. */
1570 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1573 procedure_kind (gfc_symbol
*sym
)
1575 if (generic_sym (sym
))
1576 return PTYPE_GENERIC
;
1578 if (specific_sym (sym
))
1579 return PTYPE_SPECIFIC
;
1581 return PTYPE_UNKNOWN
;
1584 /* Check references to assumed size arrays. The flag need_full_assumed_size
1585 is nonzero when matching actual arguments. */
1587 static int need_full_assumed_size
= 0;
1590 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1592 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1595 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1596 What should it be? */
1597 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1598 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1599 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1601 gfc_error ("The upper bound in the last dimension must "
1602 "appear in the reference to the assumed size "
1603 "array %qs at %L", sym
->name
, &e
->where
);
1610 /* Look for bad assumed size array references in argument expressions
1611 of elemental and array valued intrinsic procedures. Since this is
1612 called from procedure resolution functions, it only recurses at
1616 resolve_assumed_size_actual (gfc_expr
*e
)
1621 switch (e
->expr_type
)
1624 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1629 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1630 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1641 /* Check a generic procedure, passed as an actual argument, to see if
1642 there is a matching specific name. If none, it is an error, and if
1643 more than one, the reference is ambiguous. */
1645 count_specific_procs (gfc_expr
*e
)
1652 sym
= e
->symtree
->n
.sym
;
1654 for (p
= sym
->generic
; p
; p
= p
->next
)
1655 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1657 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1663 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1667 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1668 "argument at %L", sym
->name
, &e
->where
);
1674 /* See if a call to sym could possibly be a not allowed RECURSION because of
1675 a missing RECURSIVE declaration. This means that either sym is the current
1676 context itself, or sym is the parent of a contained procedure calling its
1677 non-RECURSIVE containing procedure.
1678 This also works if sym is an ENTRY. */
1681 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1683 gfc_symbol
* proc_sym
;
1684 gfc_symbol
* context_proc
;
1685 gfc_namespace
* real_context
;
1687 if (sym
->attr
.flavor
== FL_PROGRAM
1688 || gfc_fl_struct (sym
->attr
.flavor
))
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1756 if (sym
->resolve_symbol_called
>= 2)
1759 sym
->resolve_symbol_called
= 2;
1761 /* Already resolved. */
1762 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1765 /* We already know this one is an intrinsic, so we don't call
1766 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1767 gfc_find_subroutine directly to check whether it is a function or
1770 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1772 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1773 isym
= gfc_intrinsic_subroutine_by_id (id
);
1775 else if (sym
->intmod_sym_id
)
1777 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1778 isym
= gfc_intrinsic_function_by_id (id
);
1780 else if (!sym
->attr
.subroutine
)
1781 isym
= gfc_find_function (sym
->name
);
1783 if (isym
&& !sym
->attr
.subroutine
)
1785 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1786 && !sym
->attr
.implicit_type
)
1787 gfc_warning (OPT_Wsurprising
,
1788 "Type specified for intrinsic function %qs at %L is"
1789 " ignored", sym
->name
, &sym
->declared_at
);
1791 if (!sym
->attr
.function
&&
1792 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1797 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1799 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1801 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1802 " specifier", sym
->name
, &sym
->declared_at
);
1806 if (!sym
->attr
.subroutine
&&
1807 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1812 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1817 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1819 sym
->attr
.pure
= isym
->pure
;
1820 sym
->attr
.elemental
= isym
->elemental
;
1822 /* Check it is actually available in the standard settings. */
1823 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1825 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1826 "available in the current standard settings but %s. Use "
1827 "an appropriate %<-std=*%> option or enable "
1828 "%<-fall-intrinsics%> in order to use it.",
1829 sym
->name
, &sym
->declared_at
, symstd
);
1837 /* Resolve a procedure expression, like passing it to a called procedure or as
1838 RHS for a procedure pointer assignment. */
1841 resolve_procedure_expression (gfc_expr
* expr
)
1845 if (expr
->expr_type
!= EXPR_VARIABLE
)
1847 gcc_assert (expr
->symtree
);
1849 sym
= expr
->symtree
->n
.sym
;
1851 if (sym
->attr
.intrinsic
)
1852 gfc_resolve_intrinsic (sym
, &expr
->where
);
1854 if (sym
->attr
.flavor
!= FL_PROCEDURE
1855 || (sym
->attr
.function
&& sym
->result
== sym
))
1858 /* A non-RECURSIVE procedure that is used as procedure expression within its
1859 own body is in danger of being called recursively. */
1860 if (is_illegal_recursion (sym
, gfc_current_ns
))
1861 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1862 " itself recursively. Declare it RECURSIVE or use"
1863 " %<-frecursive%>", sym
->name
, &expr
->where
);
1869 /* Check that name is not a derived type. */
1872 is_dt_name (const char *name
)
1874 gfc_symbol
*dt_list
, *dt_first
;
1876 dt_list
= dt_first
= gfc_derived_types
;
1877 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1879 if (strcmp(dt_list
->name
, name
) == 0)
1881 if (dt_first
== dt_list
->dt_next
)
1888 /* Resolve an actual argument list. Most of the time, this is just
1889 resolving the expressions in the list.
1890 The exception is that we sometimes have to decide whether arguments
1891 that look like procedure arguments are really simple variable
1895 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1896 bool no_formal_args
)
1899 gfc_symtree
*parent_st
;
1901 gfc_component
*comp
;
1902 int save_need_full_assumed_size
;
1903 bool return_value
= false;
1904 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1907 first_actual_arg
= true;
1909 for (; arg
; arg
= arg
->next
)
1914 /* Check the label is a valid branching target. */
1917 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1919 gfc_error ("Label %d referenced at %L is never defined",
1920 arg
->label
->value
, &arg
->label
->where
);
1924 first_actual_arg
= false;
1928 if (e
->expr_type
== EXPR_VARIABLE
1929 && e
->symtree
->n
.sym
->attr
.generic
1931 && count_specific_procs (e
) != 1)
1934 if (e
->ts
.type
!= BT_PROCEDURE
)
1936 save_need_full_assumed_size
= need_full_assumed_size
;
1937 if (e
->expr_type
!= EXPR_VARIABLE
)
1938 need_full_assumed_size
= 0;
1939 if (!gfc_resolve_expr (e
))
1941 need_full_assumed_size
= save_need_full_assumed_size
;
1945 /* See if the expression node should really be a variable reference. */
1947 sym
= e
->symtree
->n
.sym
;
1949 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1951 gfc_error ("Derived type %qs is used as an actual "
1952 "argument at %L", sym
->name
, &e
->where
);
1956 if (sym
->attr
.flavor
== FL_PROCEDURE
1957 || sym
->attr
.intrinsic
1958 || sym
->attr
.external
)
1962 /* If a procedure is not already determined to be something else
1963 check if it is intrinsic. */
1964 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1965 sym
->attr
.intrinsic
= 1;
1967 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1969 gfc_error ("Statement function %qs at %L is not allowed as an "
1970 "actual argument", sym
->name
, &e
->where
);
1973 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1974 sym
->attr
.subroutine
);
1975 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1977 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1978 "actual argument", sym
->name
, &e
->where
);
1981 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1982 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1984 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1985 " used as actual argument at %L",
1986 sym
->name
, &e
->where
))
1990 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1992 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1993 "allowed as an actual argument at %L", sym
->name
,
1997 /* Check if a generic interface has a specific procedure
1998 with the same name before emitting an error. */
1999 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2002 /* Just in case a specific was found for the expression. */
2003 sym
= e
->symtree
->n
.sym
;
2005 /* If the symbol is the function that names the current (or
2006 parent) scope, then we really have a variable reference. */
2008 if (gfc_is_function_return_value (sym
, sym
->ns
))
2011 /* If all else fails, see if we have a specific intrinsic. */
2012 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2014 gfc_intrinsic_sym
*isym
;
2016 isym
= gfc_find_function (sym
->name
);
2017 if (isym
== NULL
|| !isym
->specific
)
2019 gfc_error ("Unable to find a specific INTRINSIC procedure "
2020 "for the reference %qs at %L", sym
->name
,
2025 sym
->attr
.intrinsic
= 1;
2026 sym
->attr
.function
= 1;
2029 if (!gfc_resolve_expr (e
))
2034 /* See if the name is a module procedure in a parent unit. */
2036 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2039 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2041 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2045 if (parent_st
== NULL
)
2048 sym
= parent_st
->n
.sym
;
2049 e
->symtree
= parent_st
; /* Point to the right thing. */
2051 if (sym
->attr
.flavor
== FL_PROCEDURE
2052 || sym
->attr
.intrinsic
2053 || sym
->attr
.external
)
2055 if (!gfc_resolve_expr (e
))
2061 e
->expr_type
= EXPR_VARIABLE
;
2063 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2064 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2065 && CLASS_DATA (sym
)->as
))
2067 e
->rank
= sym
->ts
.type
== BT_CLASS
2068 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2069 e
->ref
= gfc_get_ref ();
2070 e
->ref
->type
= REF_ARRAY
;
2071 e
->ref
->u
.ar
.type
= AR_FULL
;
2072 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2073 ? CLASS_DATA (sym
)->as
: sym
->as
;
2076 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2077 primary.c (match_actual_arg). If above code determines that it
2078 is a variable instead, it needs to be resolved as it was not
2079 done at the beginning of this function. */
2080 save_need_full_assumed_size
= need_full_assumed_size
;
2081 if (e
->expr_type
!= EXPR_VARIABLE
)
2082 need_full_assumed_size
= 0;
2083 if (!gfc_resolve_expr (e
))
2085 need_full_assumed_size
= save_need_full_assumed_size
;
2088 /* Check argument list functions %VAL, %LOC and %REF. There is
2089 nothing to do for %REF. */
2090 if (arg
->name
&& arg
->name
[0] == '%')
2092 if (strcmp ("%VAL", arg
->name
) == 0)
2094 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2096 gfc_error ("By-value argument at %L is not of numeric "
2103 gfc_error ("By-value argument at %L cannot be an array or "
2104 "an array section", &e
->where
);
2108 /* Intrinsics are still PROC_UNKNOWN here. However,
2109 since same file external procedures are not resolvable
2110 in gfortran, it is a good deal easier to leave them to
2112 if (ptype
!= PROC_UNKNOWN
2113 && ptype
!= PROC_DUMMY
2114 && ptype
!= PROC_EXTERNAL
2115 && ptype
!= PROC_MODULE
)
2117 gfc_error ("By-value argument at %L is not allowed "
2118 "in this context", &e
->where
);
2123 /* Statement functions have already been excluded above. */
2124 else if (strcmp ("%LOC", arg
->name
) == 0
2125 && e
->ts
.type
== BT_PROCEDURE
)
2127 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2129 gfc_error ("Passing internal procedure at %L by location "
2130 "not allowed", &e
->where
);
2136 comp
= gfc_get_proc_ptr_comp(e
);
2137 if (e
->expr_type
== EXPR_VARIABLE
2138 && comp
&& comp
->attr
.elemental
)
2140 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2141 "allowed as an actual argument at %L", comp
->name
,
2145 /* Fortran 2008, C1237. */
2146 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2147 && gfc_has_ultimate_pointer (e
))
2149 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2150 "component", &e
->where
);
2154 first_actual_arg
= false;
2157 return_value
= true;
2160 actual_arg
= actual_arg_sav
;
2161 first_actual_arg
= first_actual_arg_sav
;
2163 return return_value
;
2167 /* Do the checks of the actual argument list that are specific to elemental
2168 procedures. If called with c == NULL, we have a function, otherwise if
2169 expr == NULL, we have a subroutine. */
2172 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2174 gfc_actual_arglist
*arg0
;
2175 gfc_actual_arglist
*arg
;
2176 gfc_symbol
*esym
= NULL
;
2177 gfc_intrinsic_sym
*isym
= NULL
;
2179 gfc_intrinsic_arg
*iformal
= NULL
;
2180 gfc_formal_arglist
*eformal
= NULL
;
2181 bool formal_optional
= false;
2182 bool set_by_optional
= false;
2186 /* Is this an elemental procedure? */
2187 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2189 if (expr
->value
.function
.esym
!= NULL
2190 && expr
->value
.function
.esym
->attr
.elemental
)
2192 arg0
= expr
->value
.function
.actual
;
2193 esym
= expr
->value
.function
.esym
;
2195 else if (expr
->value
.function
.isym
!= NULL
2196 && expr
->value
.function
.isym
->elemental
)
2198 arg0
= expr
->value
.function
.actual
;
2199 isym
= expr
->value
.function
.isym
;
2204 else if (c
&& c
->ext
.actual
!= NULL
)
2206 arg0
= c
->ext
.actual
;
2208 if (c
->resolved_sym
)
2209 esym
= c
->resolved_sym
;
2211 esym
= c
->symtree
->n
.sym
;
2214 if (!esym
->attr
.elemental
)
2220 /* The rank of an elemental is the rank of its array argument(s). */
2221 for (arg
= arg0
; arg
; arg
= arg
->next
)
2223 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2225 rank
= arg
->expr
->rank
;
2226 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2227 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2228 set_by_optional
= true;
2230 /* Function specific; set the result rank and shape. */
2234 if (!expr
->shape
&& arg
->expr
->shape
)
2236 expr
->shape
= gfc_get_shape (rank
);
2237 for (i
= 0; i
< rank
; i
++)
2238 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2245 /* If it is an array, it shall not be supplied as an actual argument
2246 to an elemental procedure unless an array of the same rank is supplied
2247 as an actual argument corresponding to a nonoptional dummy argument of
2248 that elemental procedure(12.4.1.5). */
2249 formal_optional
= false;
2251 iformal
= isym
->formal
;
2253 eformal
= esym
->formal
;
2255 for (arg
= arg0
; arg
; arg
= arg
->next
)
2259 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2260 formal_optional
= true;
2261 eformal
= eformal
->next
;
2263 else if (isym
&& iformal
)
2265 if (iformal
->optional
)
2266 formal_optional
= true;
2267 iformal
= iformal
->next
;
2270 formal_optional
= true;
2272 if (pedantic
&& arg
->expr
!= NULL
2273 && arg
->expr
->expr_type
== EXPR_VARIABLE
2274 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2277 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2278 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2280 gfc_warning (OPT_Wpedantic
,
2281 "%qs at %L is an array and OPTIONAL; IF IT IS "
2282 "MISSING, it cannot be the actual argument of an "
2283 "ELEMENTAL procedure unless there is a non-optional "
2284 "argument with the same rank (12.4.1.5)",
2285 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2289 for (arg
= arg0
; arg
; arg
= arg
->next
)
2291 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2294 /* Being elemental, the last upper bound of an assumed size array
2295 argument must be present. */
2296 if (resolve_assumed_size_actual (arg
->expr
))
2299 /* Elemental procedure's array actual arguments must conform. */
2302 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2309 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2310 is an array, the intent inout/out variable needs to be also an array. */
2311 if (rank
> 0 && esym
&& expr
== NULL
)
2312 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2313 arg
= arg
->next
, eformal
= eformal
->next
)
2314 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2315 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2316 && arg
->expr
&& arg
->expr
->rank
== 0)
2318 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2319 "ELEMENTAL subroutine %qs is a scalar, but another "
2320 "actual argument is an array", &arg
->expr
->where
,
2321 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2322 : "INOUT", eformal
->sym
->name
, esym
->name
);
2329 /* This function does the checking of references to global procedures
2330 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2331 77 and 95 standards. It checks for a gsymbol for the name, making
2332 one if it does not already exist. If it already exists, then the
2333 reference being resolved must correspond to the type of gsymbol.
2334 Otherwise, the new symbol is equipped with the attributes of the
2335 reference. The corresponding code that is called in creating
2336 global entities is parse.c.
2338 In addition, for all but -std=legacy, the gsymbols are used to
2339 check the interfaces of external procedures from the same file.
2340 The namespace of the gsymbol is resolved and then, once this is
2341 done the interface is checked. */
2345 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2347 if (!gsym_ns
->proc_name
->attr
.recursive
)
2350 if (sym
->ns
== gsym_ns
)
2353 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2360 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2362 if (gsym_ns
->entries
)
2364 gfc_entry_list
*entry
= gsym_ns
->entries
;
2366 for (; entry
; entry
= entry
->next
)
2368 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2370 if (strcmp (gsym_ns
->proc_name
->name
,
2371 sym
->ns
->proc_name
->name
) == 0)
2375 && strcmp (gsym_ns
->proc_name
->name
,
2376 sym
->ns
->parent
->proc_name
->name
) == 0)
2385 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2388 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2390 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2392 for ( ; arg
; arg
= arg
->next
)
2397 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2399 strncpy (errmsg
, _("allocatable argument"), err_len
);
2402 else if (arg
->sym
->attr
.asynchronous
)
2404 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2407 else if (arg
->sym
->attr
.optional
)
2409 strncpy (errmsg
, _("optional argument"), err_len
);
2412 else if (arg
->sym
->attr
.pointer
)
2414 strncpy (errmsg
, _("pointer argument"), err_len
);
2417 else if (arg
->sym
->attr
.target
)
2419 strncpy (errmsg
, _("target argument"), err_len
);
2422 else if (arg
->sym
->attr
.value
)
2424 strncpy (errmsg
, _("value argument"), err_len
);
2427 else if (arg
->sym
->attr
.volatile_
)
2429 strncpy (errmsg
, _("volatile argument"), err_len
);
2432 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2434 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2437 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2439 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2442 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2444 strncpy (errmsg
, _("coarray argument"), err_len
);
2447 else if (false) /* (2d) TODO: parametrized derived type */
2449 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2452 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2454 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2457 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2459 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2462 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2464 /* As assumed-type is unlimited polymorphic (cf. above).
2465 See also TS 29113, Note 6.1. */
2466 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2471 if (sym
->attr
.function
)
2473 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2475 if (res
->attr
.dimension
) /* (3a) */
2477 strncpy (errmsg
, _("array result"), err_len
);
2480 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2482 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2485 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2486 && res
->ts
.u
.cl
->length
2487 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2489 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2494 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2496 strncpy (errmsg
, _("elemental procedure"), err_len
);
2499 else if (sym
->attr
.is_bind_c
) /* (5) */
2501 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2510 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2514 enum gfc_symbol_type type
;
2517 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2519 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2520 sym
->binding_label
!= NULL
);
2522 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2523 gfc_global_used (gsym
, where
);
2525 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2526 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2527 && gsym
->type
!= GSYM_UNKNOWN
2528 && !gsym
->binding_label
2530 && gsym
->ns
->proc_name
2531 && not_in_recursive (sym
, gsym
->ns
)
2532 && not_entry_self_reference (sym
, gsym
->ns
))
2534 gfc_symbol
*def_sym
;
2535 def_sym
= gsym
->ns
->proc_name
;
2537 if (gsym
->ns
->resolved
!= -1)
2540 /* Resolve the gsymbol namespace if needed. */
2541 if (!gsym
->ns
->resolved
)
2543 gfc_symbol
*old_dt_list
;
2545 /* Stash away derived types so that the backend_decls
2546 do not get mixed up. */
2547 old_dt_list
= gfc_derived_types
;
2548 gfc_derived_types
= NULL
;
2550 gfc_resolve (gsym
->ns
);
2552 /* Store the new derived types with the global namespace. */
2553 if (gfc_derived_types
)
2554 gsym
->ns
->derived_types
= gfc_derived_types
;
2556 /* Restore the derived types of this namespace. */
2557 gfc_derived_types
= old_dt_list
;
2560 /* Make sure that translation for the gsymbol occurs before
2561 the procedure currently being resolved. */
2562 ns
= gfc_global_ns_list
;
2563 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2565 if (ns
->sibling
== gsym
->ns
)
2567 ns
->sibling
= gsym
->ns
->sibling
;
2568 gsym
->ns
->sibling
= gfc_global_ns_list
;
2569 gfc_global_ns_list
= gsym
->ns
;
2574 /* This can happen if a binding name has been specified. */
2575 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2576 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2578 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2580 gfc_entry_list
*entry
;
2581 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2582 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2584 def_sym
= entry
->sym
;
2590 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2592 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2593 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2594 gfc_typename (&def_sym
->ts
));
2598 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2599 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2601 gfc_error ("Explicit interface required for %qs at %L: %s",
2602 sym
->name
, &sym
->declared_at
, reason
);
2606 bool bad_result_characteristics
;
2607 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2608 reason
, sizeof(reason
), NULL
, NULL
,
2609 &bad_result_characteristics
))
2611 /* Turn erros into warnings with -std=gnu and -std=legacy,
2612 unless a function returns a wrong type, which can lead
2613 to all kinds of ICEs and wrong code. */
2615 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
)
2616 && !bad_result_characteristics
)
2617 gfc_errors_to_warnings (true);
2619 gfc_error ("Interface mismatch in global procedure %qs at %L: %s",
2620 sym
->name
, &sym
->declared_at
, reason
);
2621 gfc_errors_to_warnings (false);
2628 if (gsym
->type
== GSYM_UNKNOWN
)
2631 gsym
->where
= *where
;
2638 /************* Function resolution *************/
2640 /* Resolve a function call known to be generic.
2641 Section 14.1.2.4.1. */
2644 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2648 if (sym
->attr
.generic
)
2650 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2653 expr
->value
.function
.name
= s
->name
;
2654 expr
->value
.function
.esym
= s
;
2656 if (s
->ts
.type
!= BT_UNKNOWN
)
2658 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2659 expr
->ts
= s
->result
->ts
;
2662 expr
->rank
= s
->as
->rank
;
2663 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2664 expr
->rank
= s
->result
->as
->rank
;
2666 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2671 /* TODO: Need to search for elemental references in generic
2675 if (sym
->attr
.intrinsic
)
2676 return gfc_intrinsic_func_interface (expr
, 0);
2683 resolve_generic_f (gfc_expr
*expr
)
2687 gfc_interface
*intr
= NULL
;
2689 sym
= expr
->symtree
->n
.sym
;
2693 m
= resolve_generic_f0 (expr
, sym
);
2696 else if (m
== MATCH_ERROR
)
2701 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2702 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2705 if (sym
->ns
->parent
== NULL
)
2707 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2711 if (!generic_sym (sym
))
2715 /* Last ditch attempt. See if the reference is to an intrinsic
2716 that possesses a matching interface. 14.1.2.4 */
2717 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2719 if (gfc_init_expr_flag
)
2720 gfc_error ("Function %qs in initialization expression at %L "
2721 "must be an intrinsic function",
2722 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2724 gfc_error ("There is no specific function for the generic %qs "
2725 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2731 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2734 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2736 return resolve_structure_cons (expr
, 0);
2739 m
= gfc_intrinsic_func_interface (expr
, 0);
2744 gfc_error ("Generic function %qs at %L is not consistent with a "
2745 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2752 /* Resolve a function call known to be specific. */
2755 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2759 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2761 if (sym
->attr
.dummy
)
2763 sym
->attr
.proc
= PROC_DUMMY
;
2767 sym
->attr
.proc
= PROC_EXTERNAL
;
2771 if (sym
->attr
.proc
== PROC_MODULE
2772 || sym
->attr
.proc
== PROC_ST_FUNCTION
2773 || sym
->attr
.proc
== PROC_INTERNAL
)
2776 if (sym
->attr
.intrinsic
)
2778 m
= gfc_intrinsic_func_interface (expr
, 1);
2782 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2783 "with an intrinsic", sym
->name
, &expr
->where
);
2791 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2794 expr
->ts
= sym
->result
->ts
;
2797 expr
->value
.function
.name
= sym
->name
;
2798 expr
->value
.function
.esym
= sym
;
2799 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2801 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2803 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2804 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2805 else if (sym
->as
!= NULL
)
2806 expr
->rank
= sym
->as
->rank
;
2813 resolve_specific_f (gfc_expr
*expr
)
2818 sym
= expr
->symtree
->n
.sym
;
2822 m
= resolve_specific_f0 (sym
, expr
);
2825 if (m
== MATCH_ERROR
)
2828 if (sym
->ns
->parent
== NULL
)
2831 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2837 gfc_error ("Unable to resolve the specific function %qs at %L",
2838 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2843 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2844 candidates in CANDIDATES_LEN. */
2847 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2849 size_t &candidates_len
)
2855 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2856 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2857 vec_push (candidates
, candidates_len
, sym
->name
);
2861 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2865 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2869 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2872 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2874 char **candidates
= NULL
;
2875 size_t candidates_len
= 0;
2876 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2877 return gfc_closest_fuzzy_match (fn
, candidates
);
2881 /* Resolve a procedure call not known to be generic nor specific. */
2884 resolve_unknown_f (gfc_expr
*expr
)
2889 sym
= expr
->symtree
->n
.sym
;
2891 if (sym
->attr
.dummy
)
2893 sym
->attr
.proc
= PROC_DUMMY
;
2894 expr
->value
.function
.name
= sym
->name
;
2898 /* See if we have an intrinsic function reference. */
2900 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2902 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2907 /* The reference is to an external name. */
2909 sym
->attr
.proc
= PROC_EXTERNAL
;
2910 expr
->value
.function
.name
= sym
->name
;
2911 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2913 if (sym
->as
!= NULL
)
2914 expr
->rank
= sym
->as
->rank
;
2916 /* Type of the expression is either the type of the symbol or the
2917 default type of the symbol. */
2920 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2922 if (sym
->ts
.type
!= BT_UNKNOWN
)
2926 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2928 if (ts
->type
== BT_UNKNOWN
)
2931 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2933 gfc_error ("Function %qs at %L has no IMPLICIT type"
2934 "; did you mean %qs?",
2935 sym
->name
, &expr
->where
, guessed
);
2937 gfc_error ("Function %qs at %L has no IMPLICIT type",
2938 sym
->name
, &expr
->where
);
2949 /* Return true, if the symbol is an external procedure. */
2951 is_external_proc (gfc_symbol
*sym
)
2953 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2954 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2955 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2956 && !sym
->attr
.proc_pointer
2957 && !sym
->attr
.use_assoc
2965 /* Figure out if a function reference is pure or not. Also set the name
2966 of the function for a potential error message. Return nonzero if the
2967 function is PURE, zero if not. */
2969 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2972 gfc_pure_function (gfc_expr
*e
, const char **name
)
2975 gfc_component
*comp
;
2979 if (e
->symtree
!= NULL
2980 && e
->symtree
->n
.sym
!= NULL
2981 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2982 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2984 comp
= gfc_get_proc_ptr_comp (e
);
2987 pure
= gfc_pure (comp
->ts
.interface
);
2990 else if (e
->value
.function
.esym
)
2992 pure
= gfc_pure (e
->value
.function
.esym
);
2993 *name
= e
->value
.function
.esym
->name
;
2995 else if (e
->value
.function
.isym
)
2997 pure
= e
->value
.function
.isym
->pure
2998 || e
->value
.function
.isym
->elemental
;
2999 *name
= e
->value
.function
.isym
->name
;
3003 /* Implicit functions are not pure. */
3005 *name
= e
->value
.function
.name
;
3012 /* Check if the expression is a reference to an implicitly pure function. */
3015 gfc_implicit_pure_function (gfc_expr
*e
)
3017 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3019 return gfc_implicit_pure (comp
->ts
.interface
);
3020 else if (e
->value
.function
.esym
)
3021 return gfc_implicit_pure (e
->value
.function
.esym
);
3028 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3029 int *f ATTRIBUTE_UNUSED
)
3033 /* Don't bother recursing into other statement functions
3034 since they will be checked individually for purity. */
3035 if (e
->expr_type
!= EXPR_FUNCTION
3037 || e
->symtree
->n
.sym
== sym
3038 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3041 return gfc_pure_function (e
, &name
) ? false : true;
3046 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3048 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3052 /* Check if an impure function is allowed in the current context. */
3054 static bool check_pure_function (gfc_expr
*e
)
3056 const char *name
= NULL
;
3057 if (!gfc_pure_function (e
, &name
) && name
)
3061 gfc_error ("Reference to impure function %qs at %L inside a "
3062 "FORALL %s", name
, &e
->where
,
3063 forall_flag
== 2 ? "mask" : "block");
3066 else if (gfc_do_concurrent_flag
)
3068 gfc_error ("Reference to impure function %qs at %L inside a "
3069 "DO CONCURRENT %s", name
, &e
->where
,
3070 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3073 else if (gfc_pure (NULL
))
3075 gfc_error ("Reference to impure function %qs at %L "
3076 "within a PURE procedure", name
, &e
->where
);
3079 if (!gfc_implicit_pure_function (e
))
3080 gfc_unset_implicit_pure (NULL
);
3086 /* Update current procedure's array_outer_dependency flag, considering
3087 a call to procedure SYM. */
3090 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3092 /* Check to see if this is a sibling function that has not yet
3094 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3095 for (; sibling
; sibling
= sibling
->sibling
)
3097 if (sibling
->proc_name
== sym
)
3099 gfc_resolve (sibling
);
3104 /* If SYM has references to outer arrays, so has the procedure calling
3105 SYM. If SYM is a procedure pointer, we can assume the worst. */
3106 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3107 && gfc_current_ns
->proc_name
)
3108 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3112 /* Resolve a function call, which means resolving the arguments, then figuring
3113 out which entity the name refers to. */
3116 resolve_function (gfc_expr
*expr
)
3118 gfc_actual_arglist
*arg
;
3122 procedure_type p
= PROC_INTRINSIC
;
3123 bool no_formal_args
;
3127 sym
= expr
->symtree
->n
.sym
;
3129 /* If this is a procedure pointer component, it has already been resolved. */
3130 if (gfc_is_proc_ptr_comp (expr
))
3133 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3135 if (sym
&& sym
->attr
.intrinsic
3136 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3137 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3142 gfc_error ("Unexpected junk after %qs at %L", expr
->symtree
->n
.sym
->name
,
3147 if (sym
&& sym
->attr
.intrinsic
3148 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3151 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3153 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3157 /* If this is a deferred TBP with an abstract interface (which may
3158 of course be referenced), expr->value.function.esym will be set. */
3159 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3161 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3162 sym
->name
, &expr
->where
);
3166 /* If this is a deferred TBP with an abstract interface, its result
3167 cannot be an assumed length character (F2003: C418). */
3168 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3169 && sym
->result
->ts
.u
.cl
3170 && sym
->result
->ts
.u
.cl
->length
== NULL
3171 && !sym
->result
->ts
.deferred
)
3173 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3174 "character length result (F2008: C418)", sym
->name
,
3179 /* Switch off assumed size checking and do this again for certain kinds
3180 of procedure, once the procedure itself is resolved. */
3181 need_full_assumed_size
++;
3183 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3184 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3186 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3187 inquiry_argument
= true;
3188 no_formal_args
= sym
&& is_external_proc (sym
)
3189 && gfc_sym_get_dummy_args (sym
) == NULL
;
3191 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3194 inquiry_argument
= false;
3198 inquiry_argument
= false;
3200 /* Resume assumed_size checking. */
3201 need_full_assumed_size
--;
3203 /* If the procedure is external, check for usage. */
3204 if (sym
&& is_external_proc (sym
))
3205 resolve_global_procedure (sym
, &expr
->where
, 0);
3207 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3209 && sym
->ts
.u
.cl
->length
== NULL
3211 && !sym
->ts
.deferred
3212 && expr
->value
.function
.esym
== NULL
3213 && !sym
->attr
.contained
)
3215 /* Internal procedures are taken care of in resolve_contained_fntype. */
3216 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3217 "be used at %L since it is not a dummy argument",
3218 sym
->name
, &expr
->where
);
3222 /* See if function is already resolved. */
3224 if (expr
->value
.function
.name
!= NULL
3225 || expr
->value
.function
.isym
!= NULL
)
3227 if (expr
->ts
.type
== BT_UNKNOWN
)
3233 /* Apply the rules of section 14.1.2. */
3235 switch (procedure_kind (sym
))
3238 t
= resolve_generic_f (expr
);
3241 case PTYPE_SPECIFIC
:
3242 t
= resolve_specific_f (expr
);
3246 t
= resolve_unknown_f (expr
);
3250 gfc_internal_error ("resolve_function(): bad function type");
3254 /* If the expression is still a function (it might have simplified),
3255 then we check to see if we are calling an elemental function. */
3257 if (expr
->expr_type
!= EXPR_FUNCTION
)
3260 /* Walk the argument list looking for invalid BOZ. */
3261 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3262 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3264 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3265 "actual argument in a function reference",
3270 temp
= need_full_assumed_size
;
3271 need_full_assumed_size
= 0;
3273 if (!resolve_elemental_actual (expr
, NULL
))
3276 if (omp_workshare_flag
3277 && expr
->value
.function
.esym
3278 && ! gfc_elemental (expr
->value
.function
.esym
))
3280 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3281 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3286 #define GENERIC_ID expr->value.function.isym->id
3287 else if (expr
->value
.function
.actual
!= NULL
3288 && expr
->value
.function
.isym
!= NULL
3289 && GENERIC_ID
!= GFC_ISYM_LBOUND
3290 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3291 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3292 && GENERIC_ID
!= GFC_ISYM_LEN
3293 && GENERIC_ID
!= GFC_ISYM_LOC
3294 && GENERIC_ID
!= GFC_ISYM_C_LOC
3295 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3297 /* Array intrinsics must also have the last upper bound of an
3298 assumed size array argument. UBOUND and SIZE have to be
3299 excluded from the check if the second argument is anything
3302 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3304 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3305 && arg
== expr
->value
.function
.actual
3306 && arg
->next
!= NULL
&& arg
->next
->expr
)
3308 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3311 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3314 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3319 if (arg
->expr
!= NULL
3320 && arg
->expr
->rank
> 0
3321 && resolve_assumed_size_actual (arg
->expr
))
3327 need_full_assumed_size
= temp
;
3329 if (!check_pure_function(expr
))
3332 /* Functions without the RECURSIVE attribution are not allowed to
3333 * call themselves. */
3334 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3337 esym
= expr
->value
.function
.esym
;
3339 if (is_illegal_recursion (esym
, gfc_current_ns
))
3341 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3342 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3343 " function %qs is not RECURSIVE",
3344 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3346 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3347 " is not RECURSIVE", esym
->name
, &expr
->where
);
3353 /* Character lengths of use associated functions may contains references to
3354 symbols not referenced from the current program unit otherwise. Make sure
3355 those symbols are marked as referenced. */
3357 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3358 && expr
->value
.function
.esym
->attr
.use_assoc
)
3360 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3363 /* Make sure that the expression has a typespec that works. */
3364 if (expr
->ts
.type
== BT_UNKNOWN
)
3366 if (expr
->symtree
->n
.sym
->result
3367 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3368 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3369 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3372 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3374 if (expr
->value
.function
.esym
)
3375 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3377 update_current_proc_array_outer_dependency (sym
);
3380 /* typebound procedure: Assume the worst. */
3381 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3387 /************* Subroutine resolution *************/
3390 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3397 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3401 else if (gfc_do_concurrent_flag
)
3403 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3407 else if (gfc_pure (NULL
))
3409 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3413 gfc_unset_implicit_pure (NULL
);
3419 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3423 if (sym
->attr
.generic
)
3425 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3428 c
->resolved_sym
= s
;
3429 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3434 /* TODO: Need to search for elemental references in generic interface. */
3437 if (sym
->attr
.intrinsic
)
3438 return gfc_intrinsic_sub_interface (c
, 0);
3445 resolve_generic_s (gfc_code
*c
)
3450 sym
= c
->symtree
->n
.sym
;
3454 m
= resolve_generic_s0 (c
, sym
);
3457 else if (m
== MATCH_ERROR
)
3461 if (sym
->ns
->parent
== NULL
)
3463 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3467 if (!generic_sym (sym
))
3471 /* Last ditch attempt. See if the reference is to an intrinsic
3472 that possesses a matching interface. 14.1.2.4 */
3473 sym
= c
->symtree
->n
.sym
;
3475 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3477 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3478 sym
->name
, &c
->loc
);
3482 m
= gfc_intrinsic_sub_interface (c
, 0);
3486 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3487 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3493 /* Resolve a subroutine call known to be specific. */
3496 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3500 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3502 if (sym
->attr
.dummy
)
3504 sym
->attr
.proc
= PROC_DUMMY
;
3508 sym
->attr
.proc
= PROC_EXTERNAL
;
3512 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3515 if (sym
->attr
.intrinsic
)
3517 m
= gfc_intrinsic_sub_interface (c
, 1);
3521 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3522 "with an intrinsic", sym
->name
, &c
->loc
);
3530 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3532 c
->resolved_sym
= sym
;
3533 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3541 resolve_specific_s (gfc_code
*c
)
3546 sym
= c
->symtree
->n
.sym
;
3550 m
= resolve_specific_s0 (c
, sym
);
3553 if (m
== MATCH_ERROR
)
3556 if (sym
->ns
->parent
== NULL
)
3559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3565 sym
= c
->symtree
->n
.sym
;
3566 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3567 sym
->name
, &c
->loc
);
3573 /* Resolve a subroutine call not known to be generic nor specific. */
3576 resolve_unknown_s (gfc_code
*c
)
3580 sym
= c
->symtree
->n
.sym
;
3582 if (sym
->attr
.dummy
)
3584 sym
->attr
.proc
= PROC_DUMMY
;
3588 /* See if we have an intrinsic function reference. */
3590 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3592 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3597 /* The reference is to an external name. */
3600 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3602 c
->resolved_sym
= sym
;
3604 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3608 /* Resolve a subroutine call. Although it was tempting to use the same code
3609 for functions, subroutines and functions are stored differently and this
3610 makes things awkward. */
3613 resolve_call (gfc_code
*c
)
3616 procedure_type ptype
= PROC_INTRINSIC
;
3617 gfc_symbol
*csym
, *sym
;
3618 bool no_formal_args
;
3620 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3622 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3624 gfc_error ("%qs at %L has a type, which is not consistent with "
3625 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3629 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3632 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3633 sym
= st
? st
->n
.sym
: NULL
;
3634 if (sym
&& csym
!= sym
3635 && sym
->ns
== gfc_current_ns
3636 && sym
->attr
.flavor
== FL_PROCEDURE
3637 && sym
->attr
.contained
)
3640 if (csym
->attr
.generic
)
3641 c
->symtree
->n
.sym
= sym
;
3644 csym
= c
->symtree
->n
.sym
;
3648 /* If this ia a deferred TBP, c->expr1 will be set. */
3649 if (!c
->expr1
&& csym
)
3651 if (csym
->attr
.abstract
)
3653 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3654 csym
->name
, &c
->loc
);
3658 /* Subroutines without the RECURSIVE attribution are not allowed to
3660 if (is_illegal_recursion (csym
, gfc_current_ns
))
3662 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3663 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3664 "as subroutine %qs is not RECURSIVE",
3665 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3667 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3668 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3674 /* Switch off assumed size checking and do this again for certain kinds
3675 of procedure, once the procedure itself is resolved. */
3676 need_full_assumed_size
++;
3679 ptype
= csym
->attr
.proc
;
3681 no_formal_args
= csym
&& is_external_proc (csym
)
3682 && gfc_sym_get_dummy_args (csym
) == NULL
;
3683 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3686 /* Resume assumed_size checking. */
3687 need_full_assumed_size
--;
3689 /* If external, check for usage. */
3690 if (csym
&& is_external_proc (csym
))
3691 resolve_global_procedure (csym
, &c
->loc
, 1);
3694 if (c
->resolved_sym
== NULL
)
3696 c
->resolved_isym
= NULL
;
3697 switch (procedure_kind (csym
))
3700 t
= resolve_generic_s (c
);
3703 case PTYPE_SPECIFIC
:
3704 t
= resolve_specific_s (c
);
3708 t
= resolve_unknown_s (c
);
3712 gfc_internal_error ("resolve_subroutine(): bad function type");
3716 /* Some checks of elemental subroutine actual arguments. */
3717 if (!resolve_elemental_actual (NULL
, c
))
3721 update_current_proc_array_outer_dependency (csym
);
3723 /* Typebound procedure: Assume the worst. */
3724 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3730 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3731 op1->shape and op2->shape are non-NULL return true if their shapes
3732 match. If both op1->shape and op2->shape are non-NULL return false
3733 if their shapes do not match. If either op1->shape or op2->shape is
3734 NULL, return true. */
3737 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3744 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3746 for (i
= 0; i
< op1
->rank
; i
++)
3748 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3750 gfc_error ("Shapes for operands at %L and %L are not conformable",
3751 &op1
->where
, &op2
->where
);
3761 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3762 For example A .AND. B becomes IAND(A, B). */
3764 logical_to_bitwise (gfc_expr
*e
)
3766 gfc_expr
*tmp
, *op1
, *op2
;
3768 gfc_actual_arglist
*args
= NULL
;
3770 gcc_assert (e
->expr_type
== EXPR_OP
);
3772 isym
= GFC_ISYM_NONE
;
3773 op1
= e
->value
.op
.op1
;
3774 op2
= e
->value
.op
.op2
;
3776 switch (e
->value
.op
.op
)
3779 isym
= GFC_ISYM_NOT
;
3782 isym
= GFC_ISYM_IAND
;
3785 isym
= GFC_ISYM_IOR
;
3787 case INTRINSIC_NEQV
:
3788 isym
= GFC_ISYM_IEOR
;
3791 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3792 Change the old expression to NEQV, which will get replaced by IEOR,
3793 and wrap it in NOT. */
3794 tmp
= gfc_copy_expr (e
);
3795 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3796 tmp
= logical_to_bitwise (tmp
);
3797 isym
= GFC_ISYM_NOT
;
3802 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3805 /* Inherit the original operation's operands as arguments. */
3806 args
= gfc_get_actual_arglist ();
3810 args
->next
= gfc_get_actual_arglist ();
3811 args
->next
->expr
= op2
;
3814 /* Convert the expression to a function call. */
3815 e
->expr_type
= EXPR_FUNCTION
;
3816 e
->value
.function
.actual
= args
;
3817 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3818 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3819 e
->value
.function
.esym
= NULL
;
3821 /* Make up a pre-resolved function call symtree if we need to. */
3822 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3825 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3826 sym
= e
->symtree
->n
.sym
;
3828 sym
->attr
.flavor
= FL_PROCEDURE
;
3829 sym
->attr
.function
= 1;
3830 sym
->attr
.elemental
= 1;
3832 sym
->attr
.referenced
= 1;
3833 gfc_intrinsic_symbol (sym
);
3834 gfc_commit_symbol (sym
);
3837 args
->name
= e
->value
.function
.isym
->formal
->name
;
3838 if (e
->value
.function
.isym
->formal
->next
)
3839 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3844 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3845 candidates in CANDIDATES_LEN. */
3847 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3849 size_t &candidates_len
)
3856 /* Not sure how to properly filter here. Use all for a start.
3857 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3858 these as i suppose they don't make terribly sense. */
3860 if (uop
->n
.uop
->op
!= NULL
)
3861 vec_push (candidates
, candidates_len
, uop
->name
);
3865 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3869 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3872 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3875 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3877 char **candidates
= NULL
;
3878 size_t candidates_len
= 0;
3879 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3880 return gfc_closest_fuzzy_match (op
, candidates
);
3884 /* Callback finding an impure function as an operand to an .and. or
3885 .or. expression. Remember the last function warned about to
3886 avoid double warnings when recursing. */
3889 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3894 static gfc_expr
*last
= NULL
;
3895 bool *found
= (bool *) data
;
3897 if (f
->expr_type
== EXPR_FUNCTION
)
3900 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3901 && !gfc_implicit_pure_function (f
))
3904 gfc_warning (OPT_Wfunction_elimination
,
3905 "Impure function %qs at %L might not be evaluated",
3908 gfc_warning (OPT_Wfunction_elimination
,
3909 "Impure function at %L might not be evaluated",
3918 /* Return true if TYPE is character based, false otherwise. */
3921 is_character_based (bt type
)
3923 return type
== BT_CHARACTER
|| type
== BT_HOLLERITH
;
3927 /* If expression is a hollerith, convert it to character and issue a warning
3928 for the conversion. */
3931 convert_hollerith_to_character (gfc_expr
*e
)
3933 if (e
->ts
.type
== BT_HOLLERITH
)
3937 t
.type
= BT_CHARACTER
;
3938 t
.kind
= e
->ts
.kind
;
3939 gfc_convert_type_warn (e
, &t
, 2, 1);
3943 /* Convert to numeric and issue a warning for the conversion. */
3946 convert_to_numeric (gfc_expr
*a
, gfc_expr
*b
)
3950 t
.type
= b
->ts
.type
;
3951 t
.kind
= b
->ts
.kind
;
3952 gfc_convert_type_warn (a
, &t
, 2, 1);
3955 /* Resolve an operator expression node. This can involve replacing the
3956 operation with a user defined function call. */
3959 resolve_operator (gfc_expr
*e
)
3961 gfc_expr
*op1
, *op2
;
3963 bool dual_locus_error
;
3966 /* Resolve all subnodes-- give them types. */
3968 switch (e
->value
.op
.op
)
3971 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3977 case INTRINSIC_UPLUS
:
3978 case INTRINSIC_UMINUS
:
3979 case INTRINSIC_PARENTHESES
:
3980 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3983 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3985 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3986 "unary operator %qs", &e
->value
.op
.op1
->where
,
3987 gfc_op2string (e
->value
.op
.op
));
3993 /* Typecheck the new node. */
3995 op1
= e
->value
.op
.op1
;
3996 op2
= e
->value
.op
.op2
;
3997 if (op1
== NULL
&& op2
== NULL
)
4000 dual_locus_error
= false;
4002 /* op1 and op2 cannot both be BOZ. */
4003 if (op1
&& op1
->ts
.type
== BT_BOZ
4004 && op2
&& op2
->ts
.type
== BT_BOZ
)
4006 gfc_error ("Operands at %L and %L cannot appear as operands of "
4007 "binary operator %qs", &op1
->where
, &op2
->where
,
4008 gfc_op2string (e
->value
.op
.op
));
4012 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
4013 || (op2
&& op2
->expr_type
== EXPR_NULL
))
4015 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
4019 switch (e
->value
.op
.op
)
4021 case INTRINSIC_UPLUS
:
4022 case INTRINSIC_UMINUS
:
4023 if (op1
->ts
.type
== BT_INTEGER
4024 || op1
->ts
.type
== BT_REAL
4025 || op1
->ts
.type
== BT_COMPLEX
)
4031 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
4032 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
4035 case INTRINSIC_PLUS
:
4036 case INTRINSIC_MINUS
:
4037 case INTRINSIC_TIMES
:
4038 case INTRINSIC_DIVIDE
:
4039 case INTRINSIC_POWER
:
4040 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4042 gfc_type_convert_binary (e
, 1);
4046 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
4048 _("Unexpected derived-type entities in binary intrinsic "
4049 "numeric operator %%<%s%%> at %%L"),
4050 gfc_op2string (e
->value
.op
.op
));
4053 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4054 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4055 gfc_typename (op2
));
4058 case INTRINSIC_CONCAT
:
4059 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4060 && op1
->ts
.kind
== op2
->ts
.kind
)
4062 e
->ts
.type
= BT_CHARACTER
;
4063 e
->ts
.kind
= op1
->ts
.kind
;
4068 _("Operands of string concatenation operator at %%L are %s/%s"),
4069 gfc_typename (op1
), gfc_typename (op2
));
4075 case INTRINSIC_NEQV
:
4076 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4078 e
->ts
.type
= BT_LOGICAL
;
4079 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4080 if (op1
->ts
.kind
< e
->ts
.kind
)
4081 gfc_convert_type (op1
, &e
->ts
, 2);
4082 else if (op2
->ts
.kind
< e
->ts
.kind
)
4083 gfc_convert_type (op2
, &e
->ts
, 2);
4085 if (flag_frontend_optimize
&&
4086 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4088 /* Warn about short-circuiting
4089 with impure function as second operand. */
4091 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4096 /* Logical ops on integers become bitwise ops with -fdec. */
4098 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4100 e
->ts
.type
= BT_INTEGER
;
4101 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4102 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4103 gfc_convert_type (op1
, &e
->ts
, 1);
4104 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4105 gfc_convert_type (op2
, &e
->ts
, 1);
4106 e
= logical_to_bitwise (e
);
4110 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4111 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4112 gfc_typename (op2
));
4117 /* Logical ops on integers become bitwise ops with -fdec. */
4118 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4120 e
->ts
.type
= BT_INTEGER
;
4121 e
->ts
.kind
= op1
->ts
.kind
;
4122 e
= logical_to_bitwise (e
);
4126 if (op1
->ts
.type
== BT_LOGICAL
)
4128 e
->ts
.type
= BT_LOGICAL
;
4129 e
->ts
.kind
= op1
->ts
.kind
;
4133 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4134 gfc_typename (op1
));
4138 case INTRINSIC_GT_OS
:
4140 case INTRINSIC_GE_OS
:
4142 case INTRINSIC_LT_OS
:
4144 case INTRINSIC_LE_OS
:
4145 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4147 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4154 case INTRINSIC_EQ_OS
:
4156 case INTRINSIC_NE_OS
:
4159 && is_character_based (op1
->ts
.type
)
4160 && is_character_based (op2
->ts
.type
))
4162 convert_hollerith_to_character (op1
);
4163 convert_hollerith_to_character (op2
);
4166 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4167 && op1
->ts
.kind
== op2
->ts
.kind
)
4169 e
->ts
.type
= BT_LOGICAL
;
4170 e
->ts
.kind
= gfc_default_logical_kind
;
4174 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4175 if (op1
->ts
.type
== BT_BOZ
)
4177 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4178 "an operand of a relational operator",
4182 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4185 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4189 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4190 if (op2
->ts
.type
== BT_BOZ
)
4192 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4193 "an operand of a relational operator",
4197 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4200 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4204 && op1
->ts
.type
== BT_HOLLERITH
&& gfc_numeric_ts (&op2
->ts
))
4205 convert_to_numeric (op1
, op2
);
4208 && gfc_numeric_ts (&op1
->ts
) && op2
->ts
.type
== BT_HOLLERITH
)
4209 convert_to_numeric (op2
, op1
);
4211 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4213 gfc_type_convert_binary (e
, 1);
4215 e
->ts
.type
= BT_LOGICAL
;
4216 e
->ts
.kind
= gfc_default_logical_kind
;
4218 if (warn_compare_reals
)
4220 gfc_intrinsic_op op
= e
->value
.op
.op
;
4222 /* Type conversion has made sure that the types of op1 and op2
4223 agree, so it is only necessary to check the first one. */
4224 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4225 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4226 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4230 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4231 msg
= "Equality comparison for %s at %L";
4233 msg
= "Inequality comparison for %s at %L";
4235 gfc_warning (OPT_Wcompare_reals
, msg
,
4236 gfc_typename (op1
), &op1
->where
);
4243 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4245 _("Logicals at %%L must be compared with %s instead of %s"),
4246 (e
->value
.op
.op
== INTRINSIC_EQ
4247 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4248 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4251 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4252 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4253 gfc_typename (op2
));
4257 case INTRINSIC_USER
:
4258 if (e
->value
.op
.uop
->op
== NULL
)
4260 const char *name
= e
->value
.op
.uop
->name
;
4261 const char *guessed
;
4262 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4264 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4267 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4269 else if (op2
== NULL
)
4270 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4271 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4274 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4275 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4276 gfc_typename (op2
));
4277 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4282 case INTRINSIC_PARENTHESES
:
4284 if (e
->ts
.type
== BT_CHARACTER
)
4285 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4289 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4292 /* Deal with arrayness of an operand through an operator. */
4294 switch (e
->value
.op
.op
)
4296 case INTRINSIC_PLUS
:
4297 case INTRINSIC_MINUS
:
4298 case INTRINSIC_TIMES
:
4299 case INTRINSIC_DIVIDE
:
4300 case INTRINSIC_POWER
:
4301 case INTRINSIC_CONCAT
:
4305 case INTRINSIC_NEQV
:
4307 case INTRINSIC_EQ_OS
:
4309 case INTRINSIC_NE_OS
:
4311 case INTRINSIC_GT_OS
:
4313 case INTRINSIC_GE_OS
:
4315 case INTRINSIC_LT_OS
:
4317 case INTRINSIC_LE_OS
:
4319 if (op1
->rank
== 0 && op2
->rank
== 0)
4322 if (op1
->rank
== 0 && op2
->rank
!= 0)
4324 e
->rank
= op2
->rank
;
4326 if (e
->shape
== NULL
)
4327 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4330 if (op1
->rank
!= 0 && op2
->rank
== 0)
4332 e
->rank
= op1
->rank
;
4334 if (e
->shape
== NULL
)
4335 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4338 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4340 if (op1
->rank
== op2
->rank
)
4342 e
->rank
= op1
->rank
;
4343 if (e
->shape
== NULL
)
4345 t
= compare_shapes (op1
, op2
);
4349 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4354 /* Allow higher level expressions to work. */
4357 /* Try user-defined operators, and otherwise throw an error. */
4358 dual_locus_error
= true;
4360 _("Inconsistent ranks for operator at %%L and %%L"));
4367 case INTRINSIC_PARENTHESES
:
4369 case INTRINSIC_UPLUS
:
4370 case INTRINSIC_UMINUS
:
4371 /* Simply copy arrayness attribute */
4372 e
->rank
= op1
->rank
;
4374 if (e
->shape
== NULL
)
4375 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4385 /* Attempt to simplify the expression. */
4388 t
= gfc_simplify_expr (e
, 0);
4389 /* Some calls do not succeed in simplification and return false
4390 even though there is no error; e.g. variable references to
4391 PARAMETER arrays. */
4392 if (!gfc_is_constant_expr (e
))
4400 match m
= gfc_extend_expr (e
);
4403 if (m
== MATCH_ERROR
)
4407 if (dual_locus_error
)
4408 gfc_error (msg
, &op1
->where
, &op2
->where
);
4410 gfc_error (msg
, &e
->where
);
4416 /************** Array resolution subroutines **************/
4419 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4421 /* Compare two integer expressions. */
4423 static compare_result
4424 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4428 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4429 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4432 /* If either of the types isn't INTEGER, we must have
4433 raised an error earlier. */
4435 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4438 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4448 /* Compare an integer expression with an integer. */
4450 static compare_result
4451 compare_bound_int (gfc_expr
*a
, int b
)
4455 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4458 if (a
->ts
.type
!= BT_INTEGER
)
4459 gfc_internal_error ("compare_bound_int(): Bad expression");
4461 i
= mpz_cmp_si (a
->value
.integer
, b
);
4471 /* Compare an integer expression with a mpz_t. */
4473 static compare_result
4474 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4478 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4481 if (a
->ts
.type
!= BT_INTEGER
)
4482 gfc_internal_error ("compare_bound_int(): Bad expression");
4484 i
= mpz_cmp (a
->value
.integer
, b
);
4494 /* Compute the last value of a sequence given by a triplet.
4495 Return 0 if it wasn't able to compute the last value, or if the
4496 sequence if empty, and 1 otherwise. */
4499 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4500 gfc_expr
*stride
, mpz_t last
)
4504 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4505 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4506 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4509 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4510 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4513 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4515 if (compare_bound (start
, end
) == CMP_GT
)
4517 mpz_set (last
, end
->value
.integer
);
4521 if (compare_bound_int (stride
, 0) == CMP_GT
)
4523 /* Stride is positive */
4524 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4529 /* Stride is negative */
4530 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4535 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4536 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4537 mpz_sub (last
, end
->value
.integer
, rem
);
4544 /* Compare a single dimension of an array reference to the array
4548 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4552 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4554 gcc_assert (ar
->stride
[i
] == NULL
);
4555 /* This implies [*] as [*:] and [*:3] are not possible. */
4556 if (ar
->start
[i
] == NULL
)
4558 gcc_assert (ar
->end
[i
] == NULL
);
4563 /* Given start, end and stride values, calculate the minimum and
4564 maximum referenced indexes. */
4566 switch (ar
->dimen_type
[i
])
4569 case DIMEN_THIS_IMAGE
:
4574 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4577 gfc_warning (0, "Array reference at %L is out of bounds "
4578 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4579 mpz_get_si (ar
->start
[i
]->value
.integer
),
4580 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4582 gfc_warning (0, "Array reference at %L is out of bounds "
4583 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4584 mpz_get_si (ar
->start
[i
]->value
.integer
),
4585 mpz_get_si (as
->lower
[i
]->value
.integer
),
4589 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4592 gfc_warning (0, "Array reference at %L is out of bounds "
4593 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4594 mpz_get_si (ar
->start
[i
]->value
.integer
),
4595 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4597 gfc_warning (0, "Array reference at %L is out of bounds "
4598 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4599 mpz_get_si (ar
->start
[i
]->value
.integer
),
4600 mpz_get_si (as
->upper
[i
]->value
.integer
),
4609 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4610 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4612 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4614 /* Check for zero stride, which is not allowed. */
4615 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4617 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4621 /* if start == len || (stride > 0 && start < len)
4622 || (stride < 0 && start > len),
4623 then the array section contains at least one element. In this
4624 case, there is an out-of-bounds access if
4625 (start < lower || start > upper). */
4626 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4627 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4628 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4629 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4630 && comp_start_end
== CMP_GT
))
4632 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4634 gfc_warning (0, "Lower array reference at %L is out of bounds "
4635 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4636 mpz_get_si (AR_START
->value
.integer
),
4637 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4640 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4642 gfc_warning (0, "Lower array reference at %L is out of bounds "
4643 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4644 mpz_get_si (AR_START
->value
.integer
),
4645 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4650 /* If we can compute the highest index of the array section,
4651 then it also has to be between lower and upper. */
4652 mpz_init (last_value
);
4653 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4656 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4658 gfc_warning (0, "Upper array reference at %L is out of bounds "
4659 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4660 mpz_get_si (last_value
),
4661 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4662 mpz_clear (last_value
);
4665 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4667 gfc_warning (0, "Upper array reference at %L is out of bounds "
4668 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4669 mpz_get_si (last_value
),
4670 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4671 mpz_clear (last_value
);
4675 mpz_clear (last_value
);
4683 gfc_internal_error ("check_dimension(): Bad array reference");
4690 /* Compare an array reference with an array specification. */
4693 compare_spec_to_ref (gfc_array_ref
*ar
)
4700 /* TODO: Full array sections are only allowed as actual parameters. */
4701 if (as
->type
== AS_ASSUMED_SIZE
4702 && (/*ar->type == AR_FULL
4703 ||*/ (ar
->type
== AR_SECTION
4704 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4706 gfc_error ("Rightmost upper bound of assumed size array section "
4707 "not specified at %L", &ar
->where
);
4711 if (ar
->type
== AR_FULL
)
4714 if (as
->rank
!= ar
->dimen
)
4716 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4717 &ar
->where
, ar
->dimen
, as
->rank
);
4721 /* ar->codimen == 0 is a local array. */
4722 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4724 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4725 &ar
->where
, ar
->codimen
, as
->corank
);
4729 for (i
= 0; i
< as
->rank
; i
++)
4730 if (!check_dimension (i
, ar
, as
))
4733 /* Local access has no coarray spec. */
4734 if (ar
->codimen
!= 0)
4735 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4737 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4738 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4740 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4741 i
+ 1 - as
->rank
, &ar
->where
);
4744 if (!check_dimension (i
, ar
, as
))
4752 /* Resolve one part of an array index. */
4755 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4756 int force_index_integer_kind
)
4763 if (!gfc_resolve_expr (index
))
4766 if (check_scalar
&& index
->rank
!= 0)
4768 gfc_error ("Array index at %L must be scalar", &index
->where
);
4772 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4774 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4775 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4779 if (index
->ts
.type
== BT_REAL
)
4780 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4784 if ((index
->ts
.kind
!= gfc_index_integer_kind
4785 && force_index_integer_kind
)
4786 || index
->ts
.type
!= BT_INTEGER
)
4789 ts
.type
= BT_INTEGER
;
4790 ts
.kind
= gfc_index_integer_kind
;
4792 gfc_convert_type_warn (index
, &ts
, 2, 0);
4798 /* Resolve one part of an array index. */
4801 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4803 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4806 /* Resolve a dim argument to an intrinsic function. */
4809 gfc_resolve_dim_arg (gfc_expr
*dim
)
4814 if (!gfc_resolve_expr (dim
))
4819 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4824 if (dim
->ts
.type
!= BT_INTEGER
)
4826 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4830 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4835 ts
.type
= BT_INTEGER
;
4836 ts
.kind
= gfc_index_integer_kind
;
4838 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4844 /* Given an expression that contains array references, update those array
4845 references to point to the right array specifications. While this is
4846 filled in during matching, this information is difficult to save and load
4847 in a module, so we take care of it here.
4849 The idea here is that the original array reference comes from the
4850 base symbol. We traverse the list of reference structures, setting
4851 the stored reference to references. Component references can
4852 provide an additional array specification. */
4855 find_array_spec (gfc_expr
*e
)
4860 bool class_as
= false;
4862 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4864 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4868 as
= e
->symtree
->n
.sym
->as
;
4870 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4875 gfc_internal_error ("find_array_spec(): Missing spec");
4882 c
= ref
->u
.c
.component
;
4883 if (c
->attr
.dimension
)
4885 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4886 gfc_internal_error ("find_array_spec(): unused as(1)");
4898 gfc_internal_error ("find_array_spec(): unused as(2)");
4902 /* Resolve an array reference. */
4905 resolve_array_ref (gfc_array_ref
*ar
)
4907 int i
, check_scalar
;
4910 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4912 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4914 /* Do not force gfc_index_integer_kind for the start. We can
4915 do fine with any integer kind. This avoids temporary arrays
4916 created for indexing with a vector. */
4917 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4919 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4921 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4926 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4930 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4934 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4935 if (e
->expr_type
== EXPR_VARIABLE
4936 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4937 ar
->start
[i
] = gfc_get_parentheses (e
);
4941 gfc_error ("Array index at %L is an array of rank %d",
4942 &ar
->c_where
[i
], e
->rank
);
4946 /* Fill in the upper bound, which may be lower than the
4947 specified one for something like a(2:10:5), which is
4948 identical to a(2:7:5). Only relevant for strides not equal
4949 to one. Don't try a division by zero. */
4950 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4951 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4952 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4953 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4957 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4959 if (ar
->end
[i
] == NULL
)
4962 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4964 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4966 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4967 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4969 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4980 if (ar
->type
== AR_FULL
)
4982 if (ar
->as
->rank
== 0)
4983 ar
->type
= AR_ELEMENT
;
4985 /* Make sure array is the same as array(:,:), this way
4986 we don't need to special case all the time. */
4987 ar
->dimen
= ar
->as
->rank
;
4988 for (i
= 0; i
< ar
->dimen
; i
++)
4990 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4992 gcc_assert (ar
->start
[i
] == NULL
);
4993 gcc_assert (ar
->end
[i
] == NULL
);
4994 gcc_assert (ar
->stride
[i
] == NULL
);
4998 /* If the reference type is unknown, figure out what kind it is. */
5000 if (ar
->type
== AR_UNKNOWN
)
5002 ar
->type
= AR_ELEMENT
;
5003 for (i
= 0; i
< ar
->dimen
; i
++)
5004 if (ar
->dimen_type
[i
] == DIMEN_RANGE
5005 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
5007 ar
->type
= AR_SECTION
;
5012 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
5015 if (ar
->as
->corank
&& ar
->codimen
== 0)
5018 ar
->codimen
= ar
->as
->corank
;
5019 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
5020 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
5028 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
5030 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
5032 if (ref
->u
.ss
.start
!= NULL
)
5034 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
5037 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
5039 gfc_error ("Substring start index at %L must be of type INTEGER",
5040 &ref
->u
.ss
.start
->where
);
5044 if (ref
->u
.ss
.start
->rank
!= 0)
5046 gfc_error ("Substring start index at %L must be scalar",
5047 &ref
->u
.ss
.start
->where
);
5051 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
5052 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5053 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5055 gfc_error ("Substring start index at %L is less than one",
5056 &ref
->u
.ss
.start
->where
);
5061 if (ref
->u
.ss
.end
!= NULL
)
5063 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
5066 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
5068 gfc_error ("Substring end index at %L must be of type INTEGER",
5069 &ref
->u
.ss
.end
->where
);
5073 if (ref
->u
.ss
.end
->rank
!= 0)
5075 gfc_error ("Substring end index at %L must be scalar",
5076 &ref
->u
.ss
.end
->where
);
5080 if (ref
->u
.ss
.length
!= NULL
5081 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5082 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5083 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5085 gfc_error ("Substring end index at %L exceeds the string length",
5086 &ref
->u
.ss
.start
->where
);
5090 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5091 gfc_integer_kinds
[k
].huge
) == CMP_GT
5092 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5093 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5095 gfc_error ("Substring end index at %L is too large",
5096 &ref
->u
.ss
.end
->where
);
5099 /* If the substring has the same length as the original
5100 variable, the reference itself can be deleted. */
5102 if (ref
->u
.ss
.length
!= NULL
5103 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5104 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5105 *equal_length
= true;
5112 /* This function supplies missing substring charlens. */
5115 gfc_resolve_substring_charlen (gfc_expr
*e
)
5118 gfc_expr
*start
, *end
;
5119 gfc_typespec
*ts
= NULL
;
5122 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5124 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5126 if (char_ref
->type
== REF_COMPONENT
)
5127 ts
= &char_ref
->u
.c
.component
->ts
;
5130 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5133 gcc_assert (char_ref
->next
== NULL
);
5137 if (e
->ts
.u
.cl
->length
)
5138 gfc_free_expr (e
->ts
.u
.cl
->length
);
5139 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5144 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5146 if (char_ref
->u
.ss
.start
)
5147 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5149 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5151 if (char_ref
->u
.ss
.end
)
5152 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5153 else if (e
->expr_type
== EXPR_VARIABLE
)
5156 ts
= &e
->symtree
->n
.sym
->ts
;
5157 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5164 gfc_free_expr (start
);
5165 gfc_free_expr (end
);
5169 /* Length = (end - start + 1).
5170 Check first whether it has a constant length. */
5171 if (gfc_dep_difference (end
, start
, &diff
))
5173 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5176 mpz_add_ui (len
->value
.integer
, diff
, 1);
5178 e
->ts
.u
.cl
->length
= len
;
5179 /* The check for length < 0 is handled below */
5183 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5184 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5185 gfc_get_int_expr (gfc_charlen_int_kind
,
5189 /* F2008, 6.4.1: Both the starting point and the ending point shall
5190 be within the range 1, 2, ..., n unless the starting point exceeds
5191 the ending point, in which case the substring has length zero. */
5193 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5194 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5196 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5197 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5199 /* Make sure that the length is simplified. */
5200 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5201 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5205 /* Resolve subtype references. */
5208 gfc_resolve_ref (gfc_expr
*expr
)
5210 int current_part_dimension
, n_components
, seen_part_dimension
, dim
;
5211 gfc_ref
*ref
, **prev
, *array_ref
;
5214 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5215 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5217 find_array_spec (expr
);
5221 for (prev
= &expr
->ref
; *prev
!= NULL
;
5222 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5223 switch ((*prev
)->type
)
5226 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5235 equal_length
= false;
5236 if (!resolve_substring (*prev
, &equal_length
))
5239 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5241 /* Remove the reference and move the charlen, if any. */
5245 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5246 ref
->u
.ss
.length
= NULL
;
5247 gfc_free_ref_list (ref
);
5252 /* Check constraints on part references. */
5254 current_part_dimension
= 0;
5255 seen_part_dimension
= 0;
5259 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5265 switch (ref
->u
.ar
.type
)
5268 /* Coarray scalar. */
5269 if (ref
->u
.ar
.as
->rank
== 0)
5271 current_part_dimension
= 0;
5276 current_part_dimension
= 1;
5281 current_part_dimension
= 0;
5285 gfc_internal_error ("resolve_ref(): Bad array reference");
5291 if (current_part_dimension
|| seen_part_dimension
)
5294 if (ref
->u
.c
.component
->attr
.pointer
5295 || ref
->u
.c
.component
->attr
.proc_pointer
5296 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5297 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5299 gfc_error ("Component to the right of a part reference "
5300 "with nonzero rank must not have the POINTER "
5301 "attribute at %L", &expr
->where
);
5304 else if (ref
->u
.c
.component
->attr
.allocatable
5305 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5306 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5309 gfc_error ("Component to the right of a part reference "
5310 "with nonzero rank must not have the ALLOCATABLE "
5311 "attribute at %L", &expr
->where
);
5323 /* Implement requirement in note 9.7 of F2018 that the result of the
5324 LEN inquiry be a scalar. */
5325 if (ref
->u
.i
== INQUIRY_LEN
&& array_ref
&& expr
->ts
.deferred
)
5327 array_ref
->u
.ar
.type
= AR_ELEMENT
;
5329 /* INQUIRY_LEN is not evaluated from the rest of the expr
5330 but directly from the string length. This means that setting
5331 the array indices to one does not matter but might trigger
5332 a runtime bounds error. Suppress the check. */
5333 expr
->no_bounds_check
= 1;
5334 for (dim
= 0; dim
< array_ref
->u
.ar
.dimen
; dim
++)
5336 array_ref
->u
.ar
.dimen_type
[dim
] = DIMEN_ELEMENT
;
5337 if (array_ref
->u
.ar
.start
[dim
])
5338 gfc_free_expr (array_ref
->u
.ar
.start
[dim
]);
5339 array_ref
->u
.ar
.start
[dim
]
5340 = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
5341 if (array_ref
->u
.ar
.end
[dim
])
5342 gfc_free_expr (array_ref
->u
.ar
.end
[dim
]);
5343 if (array_ref
->u
.ar
.stride
[dim
])
5344 gfc_free_expr (array_ref
->u
.ar
.stride
[dim
]);
5350 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5351 || ref
->next
== NULL
)
5352 && current_part_dimension
5353 && seen_part_dimension
)
5355 gfc_error ("Two or more part references with nonzero rank must "
5356 "not be specified at %L", &expr
->where
);
5360 if (ref
->type
== REF_COMPONENT
)
5362 if (current_part_dimension
)
5363 seen_part_dimension
= 1;
5365 /* reset to make sure */
5366 current_part_dimension
= 0;
5374 /* Given an expression, determine its shape. This is easier than it sounds.
5375 Leaves the shape array NULL if it is not possible to determine the shape. */
5378 expression_shape (gfc_expr
*e
)
5380 mpz_t array
[GFC_MAX_DIMENSIONS
];
5383 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5386 for (i
= 0; i
< e
->rank
; i
++)
5387 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5390 e
->shape
= gfc_get_shape (e
->rank
);
5392 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5397 for (i
--; i
>= 0; i
--)
5398 mpz_clear (array
[i
]);
5402 /* Given a variable expression node, compute the rank of the expression by
5403 examining the base symbol and any reference structures it may have. */
5406 gfc_expression_rank (gfc_expr
*e
)
5411 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5412 could lead to serious confusion... */
5413 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5417 if (e
->expr_type
== EXPR_ARRAY
)
5419 /* Constructors can have a rank different from one via RESHAPE(). */
5421 e
->rank
= ((e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
)
5422 ? 0 : e
->symtree
->n
.sym
->as
->rank
);
5428 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5430 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5431 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5432 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5434 if (ref
->type
!= REF_ARRAY
)
5437 if (ref
->u
.ar
.type
== AR_FULL
)
5439 rank
= ref
->u
.ar
.as
->rank
;
5443 if (ref
->u
.ar
.type
== AR_SECTION
)
5445 /* Figure out the rank of the section. */
5447 gfc_internal_error ("gfc_expression_rank(): Two array specs");
5449 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5450 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5451 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5461 expression_shape (e
);
5466 add_caf_get_intrinsic (gfc_expr
*e
)
5468 gfc_expr
*wrapper
, *tmp_expr
;
5472 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5473 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5478 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5479 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5482 tmp_expr
= XCNEW (gfc_expr
);
5484 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5485 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5486 wrapper
->ts
= e
->ts
;
5487 wrapper
->rank
= e
->rank
;
5489 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5496 remove_caf_get_intrinsic (gfc_expr
*e
)
5498 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5499 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5500 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5501 e
->value
.function
.actual
->expr
= NULL
;
5502 gfc_free_actual_arglist (e
->value
.function
.actual
);
5503 gfc_free_shape (&e
->shape
, e
->rank
);
5509 /* Resolve a variable expression. */
5512 resolve_variable (gfc_expr
*e
)
5519 if (e
->symtree
== NULL
)
5521 sym
= e
->symtree
->n
.sym
;
5523 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5524 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5525 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5527 if (!actual_arg
|| inquiry_argument
)
5529 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5530 "be used as actual argument", sym
->name
, &e
->where
);
5534 /* TS 29113, 407b. */
5535 else if (e
->ts
.type
== BT_ASSUMED
)
5539 gfc_error ("Assumed-type variable %s at %L may only be used "
5540 "as actual argument", sym
->name
, &e
->where
);
5543 else if (inquiry_argument
&& !first_actual_arg
)
5545 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5546 for all inquiry functions in resolve_function; the reason is
5547 that the function-name resolution happens too late in that
5549 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5550 "an inquiry function shall be the first argument",
5551 sym
->name
, &e
->where
);
5555 /* TS 29113, C535b. */
5556 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5557 && CLASS_DATA (sym
)->as
5558 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5559 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5560 && sym
->as
->type
== AS_ASSUMED_RANK
))
5561 && !sym
->attr
.select_rank_temporary
)
5564 && !(cs_base
&& cs_base
->current
5565 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5567 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5568 "actual argument", sym
->name
, &e
->where
);
5571 else if (inquiry_argument
&& !first_actual_arg
)
5573 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5574 for all inquiry functions in resolve_function; the reason is
5575 that the function-name resolution happens too late in that
5577 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5578 "to an inquiry function shall be the first argument",
5579 sym
->name
, &e
->where
);
5584 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5585 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5586 && e
->ref
->next
== NULL
))
5588 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5589 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5592 /* TS 29113, 407b. */
5593 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5594 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5595 && e
->ref
->next
== NULL
))
5597 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5598 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5602 /* TS 29113, C535b. */
5603 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5604 && CLASS_DATA (sym
)->as
5605 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5606 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5607 && sym
->as
->type
== AS_ASSUMED_RANK
))
5609 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5610 && e
->ref
->next
== NULL
))
5612 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5613 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5617 /* For variables that are used in an associate (target => object) where
5618 the object's basetype is array valued while the target is scalar,
5619 the ts' type of the component refs is still array valued, which
5620 can't be translated that way. */
5621 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5622 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5623 && CLASS_DATA (sym
->assoc
->target
)->as
)
5625 gfc_ref
*ref
= e
->ref
;
5631 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5632 /* Stop the loop. */
5642 /* If this is an associate-name, it may be parsed with an array reference
5643 in error even though the target is scalar. Fail directly in this case.
5644 TODO Understand why class scalar expressions must be excluded. */
5645 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5647 if (sym
->ts
.type
== BT_CLASS
)
5648 gfc_fix_class_refs (e
);
5649 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5651 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5653 /* This can happen because the parser did not detect that the
5654 associate name is an array and the expression had no array
5656 gfc_ref
*ref
= gfc_get_ref ();
5657 ref
->type
= REF_ARRAY
;
5658 ref
->u
.ar
= *gfc_get_array_ref();
5659 ref
->u
.ar
.type
= AR_FULL
;
5662 ref
->u
.ar
.as
= sym
->as
;
5663 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5671 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5672 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5674 /* On the other hand, the parser may not have known this is an array;
5675 in this case, we have to add a FULL reference. */
5676 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5678 e
->ref
= gfc_get_ref ();
5679 e
->ref
->type
= REF_ARRAY
;
5680 e
->ref
->u
.ar
.type
= AR_FULL
;
5681 e
->ref
->u
.ar
.dimen
= 0;
5684 /* Like above, but for class types, where the checking whether an array
5685 ref is present is more complicated. Furthermore make sure not to add
5686 the full array ref to _vptr or _len refs. */
5687 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5688 && CLASS_DATA (sym
)->attr
.dimension
5689 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5691 gfc_ref
*ref
, *newref
;
5693 newref
= gfc_get_ref ();
5694 newref
->type
= REF_ARRAY
;
5695 newref
->u
.ar
.type
= AR_FULL
;
5696 newref
->u
.ar
.dimen
= 0;
5697 /* Because this is an associate var and the first ref either is a ref to
5698 the _data component or not, no traversal of the ref chain is
5699 needed. The array ref needs to be inserted after the _data ref,
5700 or when that is not present, which may happend for polymorphic
5701 types, then at the first position. */
5705 else if (ref
->type
== REF_COMPONENT
5706 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5708 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5710 newref
->next
= ref
->next
;
5714 /* Array ref present already. */
5715 gfc_free_ref_list (newref
);
5717 else if (ref
->type
== REF_ARRAY
)
5718 /* Array ref present already. */
5719 gfc_free_ref_list (newref
);
5727 if (e
->ref
&& !gfc_resolve_ref (e
))
5730 if (sym
->attr
.flavor
== FL_PROCEDURE
5731 && (!sym
->attr
.function
5732 || (sym
->attr
.function
&& sym
->result
5733 && sym
->result
->attr
.proc_pointer
5734 && !sym
->result
->attr
.function
)))
5736 e
->ts
.type
= BT_PROCEDURE
;
5737 goto resolve_procedure
;
5740 if (sym
->ts
.type
!= BT_UNKNOWN
)
5741 gfc_variable_attr (e
, &e
->ts
);
5742 else if (sym
->attr
.flavor
== FL_PROCEDURE
5743 && sym
->attr
.function
&& sym
->result
5744 && sym
->result
->ts
.type
!= BT_UNKNOWN
5745 && sym
->result
->attr
.proc_pointer
)
5746 e
->ts
= sym
->result
->ts
;
5749 /* Must be a simple variable reference. */
5750 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5755 if (check_assumed_size_reference (sym
, e
))
5758 /* Deal with forward references to entries during gfc_resolve_code, to
5759 satisfy, at least partially, 12.5.2.5. */
5760 if (gfc_current_ns
->entries
5761 && current_entry_id
== sym
->entry_id
5764 && cs_base
->current
->op
!= EXEC_ENTRY
)
5766 gfc_entry_list
*entry
;
5767 gfc_formal_arglist
*formal
;
5769 bool seen
, saved_specification_expr
;
5771 /* If the symbol is a dummy... */
5772 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5774 entry
= gfc_current_ns
->entries
;
5777 /* ...test if the symbol is a parameter of previous entries. */
5778 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5779 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5781 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5788 /* If it has not been seen as a dummy, this is an error. */
5791 if (specification_expr
)
5792 gfc_error ("Variable %qs, used in a specification expression"
5793 ", is referenced at %L before the ENTRY statement "
5794 "in which it is a parameter",
5795 sym
->name
, &cs_base
->current
->loc
);
5797 gfc_error ("Variable %qs is used at %L before the ENTRY "
5798 "statement in which it is a parameter",
5799 sym
->name
, &cs_base
->current
->loc
);
5804 /* Now do the same check on the specification expressions. */
5805 saved_specification_expr
= specification_expr
;
5806 specification_expr
= true;
5807 if (sym
->ts
.type
== BT_CHARACTER
5808 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5812 for (n
= 0; n
< sym
->as
->rank
; n
++)
5814 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5816 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5819 specification_expr
= saved_specification_expr
;
5822 /* Update the symbol's entry level. */
5823 sym
->entry_id
= current_entry_id
+ 1;
5826 /* If a symbol has been host_associated mark it. This is used latter,
5827 to identify if aliasing is possible via host association. */
5828 if (sym
->attr
.flavor
== FL_VARIABLE
5829 && gfc_current_ns
->parent
5830 && (gfc_current_ns
->parent
== sym
->ns
5831 || (gfc_current_ns
->parent
->parent
5832 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5833 sym
->attr
.host_assoc
= 1;
5835 if (gfc_current_ns
->proc_name
5836 && sym
->attr
.dimension
5837 && (sym
->ns
!= gfc_current_ns
5838 || sym
->attr
.use_assoc
5839 || sym
->attr
.in_common
))
5840 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5843 if (t
&& !resolve_procedure_expression (e
))
5846 /* F2008, C617 and C1229. */
5847 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5848 && gfc_is_coindexed (e
))
5850 gfc_ref
*ref
, *ref2
= NULL
;
5852 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5854 if (ref
->type
== REF_COMPONENT
)
5856 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5860 for ( ; ref
; ref
= ref
->next
)
5861 if (ref
->type
== REF_COMPONENT
)
5864 /* Expression itself is not coindexed object. */
5865 if (ref
&& e
->ts
.type
== BT_CLASS
)
5867 gfc_error ("Polymorphic subobject of coindexed object at %L",
5872 /* Expression itself is coindexed object. */
5876 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5877 for ( ; c
; c
= c
->next
)
5878 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5880 gfc_error ("Coindexed object with polymorphic allocatable "
5881 "subcomponent at %L", &e
->where
);
5889 gfc_expression_rank (e
);
5891 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5892 add_caf_get_intrinsic (e
);
5894 /* Simplify cases where access to a parameter array results in a
5895 single constant. Suppress errors since those will have been
5896 issued before, as warnings. */
5897 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5899 gfc_push_suppress_errors ();
5900 gfc_simplify_expr (e
, 1);
5901 gfc_pop_suppress_errors ();
5908 /* Checks to see that the correct symbol has been host associated.
5909 The only situation where this arises is that in which a twice
5910 contained function is parsed after the host association is made.
5911 Therefore, on detecting this, change the symbol in the expression
5912 and convert the array reference into an actual arglist if the old
5913 symbol is a variable. */
5915 check_host_association (gfc_expr
*e
)
5917 gfc_symbol
*sym
, *old_sym
;
5921 gfc_actual_arglist
*arg
, *tail
= NULL
;
5922 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5924 /* If the expression is the result of substitution in
5925 interface.c(gfc_extend_expr) because there is no way in
5926 which the host association can be wrong. */
5927 if (e
->symtree
== NULL
5928 || e
->symtree
->n
.sym
== NULL
5929 || e
->user_operator
)
5932 old_sym
= e
->symtree
->n
.sym
;
5934 if (gfc_current_ns
->parent
5935 && old_sym
->ns
!= gfc_current_ns
)
5937 /* Use the 'USE' name so that renamed module symbols are
5938 correctly handled. */
5939 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5941 if (sym
&& old_sym
!= sym
5942 && sym
->ts
.type
== old_sym
->ts
.type
5943 && sym
->attr
.flavor
== FL_PROCEDURE
5944 && sym
->attr
.contained
)
5946 /* Clear the shape, since it might not be valid. */
5947 gfc_free_shape (&e
->shape
, e
->rank
);
5949 /* Give the expression the right symtree! */
5950 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5951 gcc_assert (st
!= NULL
);
5953 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5954 || e
->expr_type
== EXPR_FUNCTION
)
5956 /* Original was function so point to the new symbol, since
5957 the actual argument list is already attached to the
5959 e
->value
.function
.esym
= NULL
;
5964 /* Original was variable so convert array references into
5965 an actual arglist. This does not need any checking now
5966 since resolve_function will take care of it. */
5967 e
->value
.function
.actual
= NULL
;
5968 e
->expr_type
= EXPR_FUNCTION
;
5971 /* Ambiguity will not arise if the array reference is not
5972 the last reference. */
5973 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5974 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5977 gcc_assert (ref
->type
== REF_ARRAY
);
5979 /* Grab the start expressions from the array ref and
5980 copy them into actual arguments. */
5981 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5983 arg
= gfc_get_actual_arglist ();
5984 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5985 if (e
->value
.function
.actual
== NULL
)
5986 tail
= e
->value
.function
.actual
= arg
;
5994 /* Dump the reference list and set the rank. */
5995 gfc_free_ref_list (e
->ref
);
5997 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
6000 gfc_resolve_expr (e
);
6004 /* This might have changed! */
6005 return e
->expr_type
== EXPR_FUNCTION
;
6010 gfc_resolve_character_operator (gfc_expr
*e
)
6012 gfc_expr
*op1
= e
->value
.op
.op1
;
6013 gfc_expr
*op2
= e
->value
.op
.op2
;
6014 gfc_expr
*e1
= NULL
;
6015 gfc_expr
*e2
= NULL
;
6017 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
6019 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
6020 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
6021 else if (op1
->expr_type
== EXPR_CONSTANT
)
6022 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6023 op1
->value
.character
.length
);
6025 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
6026 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
6027 else if (op2
->expr_type
== EXPR_CONSTANT
)
6028 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6029 op2
->value
.character
.length
);
6031 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6041 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
6042 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
6043 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
6044 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
6045 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
6051 /* Ensure that an character expression has a charlen and, if possible, a
6052 length expression. */
6055 fixup_charlen (gfc_expr
*e
)
6057 /* The cases fall through so that changes in expression type and the need
6058 for multiple fixes are picked up. In all circumstances, a charlen should
6059 be available for the middle end to hang a backend_decl on. */
6060 switch (e
->expr_type
)
6063 gfc_resolve_character_operator (e
);
6067 if (e
->expr_type
== EXPR_ARRAY
)
6068 gfc_resolve_character_array_constructor (e
);
6071 case EXPR_SUBSTRING
:
6072 if (!e
->ts
.u
.cl
&& e
->ref
)
6073 gfc_resolve_substring_charlen (e
);
6078 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6085 /* Update an actual argument to include the passed-object for type-bound
6086 procedures at the right position. */
6088 static gfc_actual_arglist
*
6089 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6092 gcc_assert (argpos
> 0);
6096 gfc_actual_arglist
* result
;
6098 result
= gfc_get_actual_arglist ();
6102 result
->name
= name
;
6108 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6110 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6115 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6118 extract_compcall_passed_object (gfc_expr
* e
)
6122 if (e
->expr_type
== EXPR_UNKNOWN
)
6124 gfc_error ("Error in typebound call at %L",
6129 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6131 if (e
->value
.compcall
.base_object
)
6132 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6135 po
= gfc_get_expr ();
6136 po
->expr_type
= EXPR_VARIABLE
;
6137 po
->symtree
= e
->symtree
;
6138 po
->ref
= gfc_copy_ref (e
->ref
);
6139 po
->where
= e
->where
;
6142 if (!gfc_resolve_expr (po
))
6149 /* Update the arglist of an EXPR_COMPCALL expression to include the
6153 update_compcall_arglist (gfc_expr
* e
)
6156 gfc_typebound_proc
* tbp
;
6158 tbp
= e
->value
.compcall
.tbp
;
6163 po
= extract_compcall_passed_object (e
);
6167 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6173 if (tbp
->pass_arg_num
<= 0)
6176 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6184 /* Extract the passed object from a PPC call (a copy of it). */
6187 extract_ppc_passed_object (gfc_expr
*e
)
6192 po
= gfc_get_expr ();
6193 po
->expr_type
= EXPR_VARIABLE
;
6194 po
->symtree
= e
->symtree
;
6195 po
->ref
= gfc_copy_ref (e
->ref
);
6196 po
->where
= e
->where
;
6198 /* Remove PPC reference. */
6200 while ((*ref
)->next
)
6201 ref
= &(*ref
)->next
;
6202 gfc_free_ref_list (*ref
);
6205 if (!gfc_resolve_expr (po
))
6212 /* Update the actual arglist of a procedure pointer component to include the
6216 update_ppc_arglist (gfc_expr
* e
)
6220 gfc_typebound_proc
* tb
;
6222 ppc
= gfc_get_proc_ptr_comp (e
);
6230 else if (tb
->nopass
)
6233 po
= extract_ppc_passed_object (e
);
6240 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6245 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6247 gfc_error ("Base object for procedure-pointer component call at %L is of"
6248 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6252 gcc_assert (tb
->pass_arg_num
> 0);
6253 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6261 /* Check that the object a TBP is called on is valid, i.e. it must not be
6262 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6265 check_typebound_baseobject (gfc_expr
* e
)
6268 bool return_value
= false;
6270 base
= extract_compcall_passed_object (e
);
6274 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6276 gfc_error ("Error in typebound call at %L", &e
->where
);
6280 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6284 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6286 gfc_error ("Base object for type-bound procedure call at %L is of"
6287 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6291 /* F08:C1230. If the procedure called is NOPASS,
6292 the base object must be scalar. */
6293 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6295 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6296 " be scalar", &e
->where
);
6300 return_value
= true;
6303 gfc_free_expr (base
);
6304 return return_value
;
6308 /* Resolve a call to a type-bound procedure, either function or subroutine,
6309 statically from the data in an EXPR_COMPCALL expression. The adapted
6310 arglist and the target-procedure symtree are returned. */
6313 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6314 gfc_actual_arglist
** actual
)
6316 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6317 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6319 /* Update the actual arglist for PASS. */
6320 if (!update_compcall_arglist (e
))
6323 *actual
= e
->value
.compcall
.actual
;
6324 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6326 gfc_free_ref_list (e
->ref
);
6328 e
->value
.compcall
.actual
= NULL
;
6330 /* If we find a deferred typebound procedure, check for derived types
6331 that an overriding typebound procedure has not been missed. */
6332 if (e
->value
.compcall
.name
6333 && !e
->value
.compcall
.tbp
->non_overridable
6334 && e
->value
.compcall
.base_object
6335 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6338 gfc_symbol
*derived
;
6340 /* Use the derived type of the base_object. */
6341 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6344 /* If necessary, go through the inheritance chain. */
6345 while (!st
&& derived
)
6347 /* Look for the typebound procedure 'name'. */
6348 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6349 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6350 e
->value
.compcall
.name
);
6352 derived
= gfc_get_derived_super_type (derived
);
6355 /* Now find the specific name in the derived type namespace. */
6356 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6357 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6358 derived
->ns
, 1, &st
);
6366 /* Get the ultimate declared type from an expression. In addition,
6367 return the last class/derived type reference and the copy of the
6368 reference list. If check_types is set true, derived types are
6369 identified as well as class references. */
6371 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6372 gfc_expr
*e
, bool check_types
)
6374 gfc_symbol
*declared
;
6381 *new_ref
= gfc_copy_ref (e
->ref
);
6383 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6385 if (ref
->type
!= REF_COMPONENT
)
6388 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6389 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6390 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6392 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6398 if (declared
== NULL
)
6399 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6405 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6406 which of the specific bindings (if any) matches the arglist and transform
6407 the expression into a call of that binding. */
6410 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6412 gfc_typebound_proc
* genproc
;
6413 const char* genname
;
6415 gfc_symbol
*derived
;
6417 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6418 genname
= e
->value
.compcall
.name
;
6419 genproc
= e
->value
.compcall
.tbp
;
6421 if (!genproc
->is_generic
)
6424 /* Try the bindings on this type and in the inheritance hierarchy. */
6425 for (; genproc
; genproc
= genproc
->overridden
)
6429 gcc_assert (genproc
->is_generic
);
6430 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6433 gfc_actual_arglist
* args
;
6436 gcc_assert (g
->specific
);
6438 if (g
->specific
->error
)
6441 target
= g
->specific
->u
.specific
->n
.sym
;
6443 /* Get the right arglist by handling PASS/NOPASS. */
6444 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6445 if (!g
->specific
->nopass
)
6448 po
= extract_compcall_passed_object (e
);
6451 gfc_free_actual_arglist (args
);
6455 gcc_assert (g
->specific
->pass_arg_num
> 0);
6456 gcc_assert (!g
->specific
->error
);
6457 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6458 g
->specific
->pass_arg
);
6460 resolve_actual_arglist (args
, target
->attr
.proc
,
6461 is_external_proc (target
)
6462 && gfc_sym_get_dummy_args (target
) == NULL
);
6464 /* Check if this arglist matches the formal. */
6465 matches
= gfc_arglist_matches_symbol (&args
, target
);
6467 /* Clean up and break out of the loop if we've found it. */
6468 gfc_free_actual_arglist (args
);
6471 e
->value
.compcall
.tbp
= g
->specific
;
6472 genname
= g
->specific_st
->name
;
6473 /* Pass along the name for CLASS methods, where the vtab
6474 procedure pointer component has to be referenced. */
6482 /* Nothing matching found! */
6483 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6484 " %qs at %L", genname
, &e
->where
);
6488 /* Make sure that we have the right specific instance for the name. */
6489 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6491 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6493 e
->value
.compcall
.tbp
= st
->n
.tb
;
6499 /* Resolve a call to a type-bound subroutine. */
6502 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6504 gfc_actual_arglist
* newactual
;
6505 gfc_symtree
* target
;
6507 /* Check that's really a SUBROUTINE. */
6508 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6510 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6511 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6512 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6513 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6514 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6517 gfc_error ("%qs at %L should be a SUBROUTINE",
6518 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6523 if (!check_typebound_baseobject (c
->expr1
))
6526 /* Pass along the name for CLASS methods, where the vtab
6527 procedure pointer component has to be referenced. */
6529 *name
= c
->expr1
->value
.compcall
.name
;
6531 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6534 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6536 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6538 /* Transform into an ordinary EXEC_CALL for now. */
6540 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6543 c
->ext
.actual
= newactual
;
6544 c
->symtree
= target
;
6545 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6547 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6549 gfc_free_expr (c
->expr1
);
6550 c
->expr1
= gfc_get_expr ();
6551 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6552 c
->expr1
->symtree
= target
;
6553 c
->expr1
->where
= c
->loc
;
6555 return resolve_call (c
);
6559 /* Resolve a component-call expression. */
6561 resolve_compcall (gfc_expr
* e
, const char **name
)
6563 gfc_actual_arglist
* newactual
;
6564 gfc_symtree
* target
;
6566 /* Check that's really a FUNCTION. */
6567 if (!e
->value
.compcall
.tbp
->function
)
6569 gfc_error ("%qs at %L should be a FUNCTION",
6570 e
->value
.compcall
.name
, &e
->where
);
6575 /* These must not be assign-calls! */
6576 gcc_assert (!e
->value
.compcall
.assign
);
6578 if (!check_typebound_baseobject (e
))
6581 /* Pass along the name for CLASS methods, where the vtab
6582 procedure pointer component has to be referenced. */
6584 *name
= e
->value
.compcall
.name
;
6586 if (!resolve_typebound_generic_call (e
, name
))
6588 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6590 /* Take the rank from the function's symbol. */
6591 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6592 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6594 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6595 arglist to the TBP's binding target. */
6597 if (!resolve_typebound_static (e
, &target
, &newactual
))
6600 e
->value
.function
.actual
= newactual
;
6601 e
->value
.function
.name
= NULL
;
6602 e
->value
.function
.esym
= target
->n
.sym
;
6603 e
->value
.function
.isym
= NULL
;
6604 e
->symtree
= target
;
6605 e
->ts
= target
->n
.sym
->ts
;
6606 e
->expr_type
= EXPR_FUNCTION
;
6608 /* Resolution is not necessary if this is a class subroutine; this
6609 function only has to identify the specific proc. Resolution of
6610 the call will be done next in resolve_typebound_call. */
6611 return gfc_resolve_expr (e
);
6615 static bool resolve_fl_derived (gfc_symbol
*sym
);
6618 /* Resolve a typebound function, or 'method'. First separate all
6619 the non-CLASS references by calling resolve_compcall directly. */
6622 resolve_typebound_function (gfc_expr
* e
)
6624 gfc_symbol
*declared
;
6636 /* Deal with typebound operators for CLASS objects. */
6637 expr
= e
->value
.compcall
.base_object
;
6638 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6639 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6641 /* Since the typebound operators are generic, we have to ensure
6642 that any delays in resolution are corrected and that the vtab
6645 declared
= ts
.u
.derived
;
6646 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6647 if (c
->ts
.u
.derived
== NULL
)
6648 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6650 if (!resolve_compcall (e
, &name
))
6653 /* Use the generic name if it is there. */
6654 name
= name
? name
: e
->value
.function
.esym
->name
;
6655 e
->symtree
= expr
->symtree
;
6656 e
->ref
= gfc_copy_ref (expr
->ref
);
6657 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6659 /* Trim away the extraneous references that emerge from nested
6660 use of interface.c (extend_expr). */
6661 if (class_ref
&& class_ref
->next
)
6663 gfc_free_ref_list (class_ref
->next
);
6664 class_ref
->next
= NULL
;
6666 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6668 gfc_free_ref_list (e
->ref
);
6672 gfc_add_vptr_component (e
);
6673 gfc_add_component_ref (e
, name
);
6674 e
->value
.function
.esym
= NULL
;
6675 if (expr
->expr_type
!= EXPR_VARIABLE
)
6676 e
->base_expr
= expr
;
6681 return resolve_compcall (e
, NULL
);
6683 if (!gfc_resolve_ref (e
))
6686 /* Get the CLASS declared type. */
6687 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6689 if (!resolve_fl_derived (declared
))
6692 /* Weed out cases of the ultimate component being a derived type. */
6693 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6694 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6696 gfc_free_ref_list (new_ref
);
6697 return resolve_compcall (e
, NULL
);
6700 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6702 /* Treat the call as if it is a typebound procedure, in order to roll
6703 out the correct name for the specific function. */
6704 if (!resolve_compcall (e
, &name
))
6706 gfc_free_ref_list (new_ref
);
6713 /* Convert the expression to a procedure pointer component call. */
6714 e
->value
.function
.esym
= NULL
;
6720 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6721 gfc_add_vptr_component (e
);
6722 gfc_add_component_ref (e
, name
);
6724 /* Recover the typespec for the expression. This is really only
6725 necessary for generic procedures, where the additional call
6726 to gfc_add_component_ref seems to throw the collection of the
6727 correct typespec. */
6731 gfc_free_ref_list (new_ref
);
6736 /* Resolve a typebound subroutine, or 'method'. First separate all
6737 the non-CLASS references by calling resolve_typebound_call
6741 resolve_typebound_subroutine (gfc_code
*code
)
6743 gfc_symbol
*declared
;
6753 st
= code
->expr1
->symtree
;
6755 /* Deal with typebound operators for CLASS objects. */
6756 expr
= code
->expr1
->value
.compcall
.base_object
;
6757 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6758 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6760 /* If the base_object is not a variable, the corresponding actual
6761 argument expression must be stored in e->base_expression so
6762 that the corresponding tree temporary can be used as the base
6763 object in gfc_conv_procedure_call. */
6764 if (expr
->expr_type
!= EXPR_VARIABLE
)
6766 gfc_actual_arglist
*args
;
6768 args
= code
->expr1
->value
.function
.actual
;
6769 for (; args
; args
= args
->next
)
6770 if (expr
== args
->expr
)
6774 /* Since the typebound operators are generic, we have to ensure
6775 that any delays in resolution are corrected and that the vtab
6777 declared
= expr
->ts
.u
.derived
;
6778 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6779 if (c
->ts
.u
.derived
== NULL
)
6780 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6782 if (!resolve_typebound_call (code
, &name
, NULL
))
6785 /* Use the generic name if it is there. */
6786 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6787 code
->expr1
->symtree
= expr
->symtree
;
6788 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6790 /* Trim away the extraneous references that emerge from nested
6791 use of interface.c (extend_expr). */
6792 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6793 if (class_ref
&& class_ref
->next
)
6795 gfc_free_ref_list (class_ref
->next
);
6796 class_ref
->next
= NULL
;
6798 else if (code
->expr1
->ref
&& !class_ref
)
6800 gfc_free_ref_list (code
->expr1
->ref
);
6801 code
->expr1
->ref
= NULL
;
6804 /* Now use the procedure in the vtable. */
6805 gfc_add_vptr_component (code
->expr1
);
6806 gfc_add_component_ref (code
->expr1
, name
);
6807 code
->expr1
->value
.function
.esym
= NULL
;
6808 if (expr
->expr_type
!= EXPR_VARIABLE
)
6809 code
->expr1
->base_expr
= expr
;
6814 return resolve_typebound_call (code
, NULL
, NULL
);
6816 if (!gfc_resolve_ref (code
->expr1
))
6819 /* Get the CLASS declared type. */
6820 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6822 /* Weed out cases of the ultimate component being a derived type. */
6823 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6824 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6826 gfc_free_ref_list (new_ref
);
6827 return resolve_typebound_call (code
, NULL
, NULL
);
6830 if (!resolve_typebound_call (code
, &name
, &overridable
))
6832 gfc_free_ref_list (new_ref
);
6835 ts
= code
->expr1
->ts
;
6839 /* Convert the expression to a procedure pointer component call. */
6840 code
->expr1
->value
.function
.esym
= NULL
;
6841 code
->expr1
->symtree
= st
;
6844 code
->expr1
->ref
= new_ref
;
6846 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6847 gfc_add_vptr_component (code
->expr1
);
6848 gfc_add_component_ref (code
->expr1
, name
);
6850 /* Recover the typespec for the expression. This is really only
6851 necessary for generic procedures, where the additional call
6852 to gfc_add_component_ref seems to throw the collection of the
6853 correct typespec. */
6854 code
->expr1
->ts
= ts
;
6857 gfc_free_ref_list (new_ref
);
6863 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6866 resolve_ppc_call (gfc_code
* c
)
6868 gfc_component
*comp
;
6870 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6871 gcc_assert (comp
!= NULL
);
6873 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6874 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6876 if (!comp
->attr
.subroutine
)
6877 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6879 if (!gfc_resolve_ref (c
->expr1
))
6882 if (!update_ppc_arglist (c
->expr1
))
6885 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6887 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6888 !(comp
->ts
.interface
6889 && comp
->ts
.interface
->formal
)))
6892 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6895 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6901 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6904 resolve_expr_ppc (gfc_expr
* e
)
6906 gfc_component
*comp
;
6908 comp
= gfc_get_proc_ptr_comp (e
);
6909 gcc_assert (comp
!= NULL
);
6911 /* Convert to EXPR_FUNCTION. */
6912 e
->expr_type
= EXPR_FUNCTION
;
6913 e
->value
.function
.isym
= NULL
;
6914 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6916 if (comp
->as
!= NULL
)
6917 e
->rank
= comp
->as
->rank
;
6919 if (!comp
->attr
.function
)
6920 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6922 if (!gfc_resolve_ref (e
))
6925 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6926 !(comp
->ts
.interface
6927 && comp
->ts
.interface
->formal
)))
6930 if (!update_ppc_arglist (e
))
6933 if (!check_pure_function(e
))
6936 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6943 gfc_is_expandable_expr (gfc_expr
*e
)
6945 gfc_constructor
*con
;
6947 if (e
->expr_type
== EXPR_ARRAY
)
6949 /* Traverse the constructor looking for variables that are flavor
6950 parameter. Parameters must be expanded since they are fully used at
6952 con
= gfc_constructor_first (e
->value
.constructor
);
6953 for (; con
; con
= gfc_constructor_next (con
))
6955 if (con
->expr
->expr_type
== EXPR_VARIABLE
6956 && con
->expr
->symtree
6957 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6958 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6960 if (con
->expr
->expr_type
== EXPR_ARRAY
6961 && gfc_is_expandable_expr (con
->expr
))
6970 /* Sometimes variables in specification expressions of the result
6971 of module procedures in submodules wind up not being the 'real'
6972 dummy. Find this, if possible, in the namespace of the first
6976 fixup_unique_dummy (gfc_expr
*e
)
6978 gfc_symtree
*st
= NULL
;
6979 gfc_symbol
*s
= NULL
;
6981 if (e
->symtree
->n
.sym
->ns
->proc_name
6982 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6983 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6986 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6989 && st
->n
.sym
!= NULL
6990 && st
->n
.sym
->attr
.dummy
)
6994 /* Resolve an expression. That is, make sure that types of operands agree
6995 with their operators, intrinsic operators are converted to function calls
6996 for overloaded types and unresolved function references are resolved. */
6999 gfc_resolve_expr (gfc_expr
*e
)
7002 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
7004 if (e
== NULL
|| e
->do_not_resolve_again
)
7007 /* inquiry_argument only applies to variables. */
7008 inquiry_save
= inquiry_argument
;
7009 actual_arg_save
= actual_arg
;
7010 first_actual_arg_save
= first_actual_arg
;
7012 if (e
->expr_type
!= EXPR_VARIABLE
)
7014 inquiry_argument
= false;
7016 first_actual_arg
= false;
7018 else if (e
->symtree
!= NULL
7019 && *e
->symtree
->name
== '@'
7020 && e
->symtree
->n
.sym
->attr
.dummy
)
7022 /* Deal with submodule specification expressions that are not
7023 found to be referenced in module.c(read_cleanup). */
7024 fixup_unique_dummy (e
);
7027 switch (e
->expr_type
)
7030 t
= resolve_operator (e
);
7036 if (check_host_association (e
))
7037 t
= resolve_function (e
);
7039 t
= resolve_variable (e
);
7041 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
7042 && e
->ref
->type
!= REF_SUBSTRING
)
7043 gfc_resolve_substring_charlen (e
);
7048 t
= resolve_typebound_function (e
);
7051 case EXPR_SUBSTRING
:
7052 t
= gfc_resolve_ref (e
);
7061 t
= resolve_expr_ppc (e
);
7066 if (!gfc_resolve_ref (e
))
7069 t
= gfc_resolve_array_constructor (e
);
7070 /* Also try to expand a constructor. */
7073 gfc_expression_rank (e
);
7074 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7075 gfc_expand_constructor (e
, false);
7078 /* This provides the opportunity for the length of constructors with
7079 character valued function elements to propagate the string length
7080 to the expression. */
7081 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7083 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7084 here rather then add a duplicate test for it above. */
7085 gfc_expand_constructor (e
, false);
7086 t
= gfc_resolve_character_array_constructor (e
);
7091 case EXPR_STRUCTURE
:
7092 t
= gfc_resolve_ref (e
);
7096 t
= resolve_structure_cons (e
, 0);
7100 t
= gfc_simplify_expr (e
, 0);
7104 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7107 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7110 inquiry_argument
= inquiry_save
;
7111 actual_arg
= actual_arg_save
;
7112 first_actual_arg
= first_actual_arg_save
;
7114 /* For some reason, resolving these expressions a second time mangles
7115 the typespec of the expression itself. */
7116 if (t
&& e
->expr_type
== EXPR_VARIABLE
7117 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7118 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7119 e
->do_not_resolve_again
= 1;
7125 /* Resolve an expression from an iterator. They must be scalar and have
7126 INTEGER or (optionally) REAL type. */
7129 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7130 const char *name_msgid
)
7132 if (!gfc_resolve_expr (expr
))
7135 if (expr
->rank
!= 0)
7137 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7141 if (expr
->ts
.type
!= BT_INTEGER
)
7143 if (expr
->ts
.type
== BT_REAL
)
7146 return gfc_notify_std (GFC_STD_F95_DEL
,
7147 "%s at %L must be integer",
7148 _(name_msgid
), &expr
->where
);
7151 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7158 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7166 /* Resolve the expressions in an iterator structure. If REAL_OK is
7167 false allow only INTEGER type iterators, otherwise allow REAL types.
7168 Set own_scope to true for ac-implied-do and data-implied-do as those
7169 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7172 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7174 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7177 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7178 _("iterator variable")))
7181 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7182 "Start expression in DO loop"))
7185 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7186 "End expression in DO loop"))
7189 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7190 "Step expression in DO loop"))
7193 /* Convert start, end, and step to the same type as var. */
7194 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7195 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7196 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7198 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7199 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7200 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7202 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7203 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7204 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7206 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7208 if ((iter
->step
->ts
.type
== BT_INTEGER
7209 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7210 || (iter
->step
->ts
.type
== BT_REAL
7211 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7213 gfc_error ("Step expression in DO loop at %L cannot be zero",
7214 &iter
->step
->where
);
7219 if (iter
->start
->expr_type
== EXPR_CONSTANT
7220 && iter
->end
->expr_type
== EXPR_CONSTANT
7221 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7224 if (iter
->start
->ts
.type
== BT_INTEGER
)
7226 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7227 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7231 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7232 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7234 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7235 gfc_warning (OPT_Wzerotrip
,
7236 "DO loop at %L will be executed zero times",
7237 &iter
->step
->where
);
7240 if (iter
->end
->expr_type
== EXPR_CONSTANT
7241 && iter
->end
->ts
.type
== BT_INTEGER
7242 && iter
->step
->expr_type
== EXPR_CONSTANT
7243 && iter
->step
->ts
.type
== BT_INTEGER
7244 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7245 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7247 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7248 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7250 if (is_step_positive
7251 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7252 gfc_warning (OPT_Wundefined_do_loop
,
7253 "DO loop at %L is undefined as it overflows",
7254 &iter
->step
->where
);
7255 else if (!is_step_positive
7256 && mpz_cmp (iter
->end
->value
.integer
,
7257 gfc_integer_kinds
[k
].min_int
) == 0)
7258 gfc_warning (OPT_Wundefined_do_loop
,
7259 "DO loop at %L is undefined as it underflows",
7260 &iter
->step
->where
);
7267 /* Traversal function for find_forall_index. f == 2 signals that
7268 that variable itself is not to be checked - only the references. */
7271 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7273 if (expr
->expr_type
!= EXPR_VARIABLE
)
7276 /* A scalar assignment */
7277 if (!expr
->ref
|| *f
== 1)
7279 if (expr
->symtree
->n
.sym
== sym
)
7291 /* Check whether the FORALL index appears in the expression or not.
7292 Returns true if SYM is found in EXPR. */
7295 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7297 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7304 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7305 to be a scalar INTEGER variable. The subscripts and stride are scalar
7306 INTEGERs, and if stride is a constant it must be nonzero.
7307 Furthermore "A subscript or stride in a forall-triplet-spec shall
7308 not contain a reference to any index-name in the
7309 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7312 resolve_forall_iterators (gfc_forall_iterator
*it
)
7314 gfc_forall_iterator
*iter
, *iter2
;
7316 for (iter
= it
; iter
; iter
= iter
->next
)
7318 if (gfc_resolve_expr (iter
->var
)
7319 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7320 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7323 if (gfc_resolve_expr (iter
->start
)
7324 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7325 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7326 &iter
->start
->where
);
7327 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7328 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7330 if (gfc_resolve_expr (iter
->end
)
7331 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7332 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7334 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7335 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7337 if (gfc_resolve_expr (iter
->stride
))
7339 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7340 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7341 &iter
->stride
->where
, "INTEGER");
7343 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7344 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7345 gfc_error ("FORALL stride expression at %L cannot be zero",
7346 &iter
->stride
->where
);
7348 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7349 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7352 for (iter
= it
; iter
; iter
= iter
->next
)
7353 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7355 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7356 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7357 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7358 gfc_error ("FORALL index %qs may not appear in triplet "
7359 "specification at %L", iter
->var
->symtree
->name
,
7360 &iter2
->start
->where
);
7365 /* Given a pointer to a symbol that is a derived type, see if it's
7366 inaccessible, i.e. if it's defined in another module and the components are
7367 PRIVATE. The search is recursive if necessary. Returns zero if no
7368 inaccessible components are found, nonzero otherwise. */
7371 derived_inaccessible (gfc_symbol
*sym
)
7375 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7378 for (c
= sym
->components
; c
; c
= c
->next
)
7380 /* Prevent an infinite loop through this function. */
7381 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7382 && sym
== c
->ts
.u
.derived
)
7385 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7393 /* Resolve the argument of a deallocate expression. The expression must be
7394 a pointer or a full array. */
7397 resolve_deallocate_expr (gfc_expr
*e
)
7399 symbol_attribute attr
;
7400 int allocatable
, pointer
;
7406 if (!gfc_resolve_expr (e
))
7409 if (e
->expr_type
!= EXPR_VARIABLE
)
7412 sym
= e
->symtree
->n
.sym
;
7413 unlimited
= UNLIMITED_POLY(sym
);
7415 if (sym
->ts
.type
== BT_CLASS
)
7417 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7418 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7422 allocatable
= sym
->attr
.allocatable
;
7423 pointer
= sym
->attr
.pointer
;
7425 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7430 if (ref
->u
.ar
.type
!= AR_FULL
7431 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7432 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7437 c
= ref
->u
.c
.component
;
7438 if (c
->ts
.type
== BT_CLASS
)
7440 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7441 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7445 allocatable
= c
->attr
.allocatable
;
7446 pointer
= c
->attr
.pointer
;
7457 attr
= gfc_expr_attr (e
);
7459 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7462 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7468 if (gfc_is_coindexed (e
))
7470 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7475 && !gfc_check_vardef_context (e
, true, true, false,
7476 _("DEALLOCATE object")))
7478 if (!gfc_check_vardef_context (e
, false, true, false,
7479 _("DEALLOCATE object")))
7486 /* Returns true if the expression e contains a reference to the symbol sym. */
7488 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7490 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7497 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7499 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7503 /* Given the expression node e for an allocatable/pointer of derived type to be
7504 allocated, get the expression node to be initialized afterwards (needed for
7505 derived types with default initializers, and derived types with allocatable
7506 components that need nullification.) */
7509 gfc_expr_to_initialize (gfc_expr
*e
)
7515 result
= gfc_copy_expr (e
);
7517 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7518 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7519 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7521 if (ref
->u
.ar
.dimen
== 0
7522 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7525 ref
->u
.ar
.type
= AR_FULL
;
7527 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7528 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7533 gfc_free_shape (&result
->shape
, result
->rank
);
7535 /* Recalculate rank, shape, etc. */
7536 gfc_resolve_expr (result
);
7541 /* If the last ref of an expression is an array ref, return a copy of the
7542 expression with that one removed. Otherwise, a copy of the original
7543 expression. This is used for allocate-expressions and pointer assignment
7544 LHS, where there may be an array specification that needs to be stripped
7545 off when using gfc_check_vardef_context. */
7548 remove_last_array_ref (gfc_expr
* e
)
7553 e2
= gfc_copy_expr (e
);
7554 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7555 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7557 gfc_free_ref_list (*r
);
7566 /* Used in resolve_allocate_expr to check that a allocation-object and
7567 a source-expr are conformable. This does not catch all possible
7568 cases; in particular a runtime checking is needed. */
7571 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7574 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7576 /* First compare rank. */
7577 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7578 || (!tail
&& e1
->rank
!= e2
->rank
))
7580 gfc_error ("Source-expr at %L must be scalar or have the "
7581 "same rank as the allocate-object at %L",
7582 &e1
->where
, &e2
->where
);
7593 for (i
= 0; i
< e1
->rank
; i
++)
7595 if (tail
->u
.ar
.start
[i
] == NULL
)
7598 if (tail
->u
.ar
.end
[i
])
7600 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7601 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7602 mpz_add_ui (s
, s
, 1);
7606 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7609 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7611 gfc_error ("Source-expr at %L and allocate-object at %L must "
7612 "have the same shape", &e1
->where
, &e2
->where
);
7625 /* Resolve the expression in an ALLOCATE statement, doing the additional
7626 checks to see whether the expression is OK or not. The expression must
7627 have a trailing array reference that gives the size of the array. */
7630 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7632 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7636 symbol_attribute attr
;
7637 gfc_ref
*ref
, *ref2
;
7640 gfc_symbol
*sym
= NULL
;
7645 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7646 checking of coarrays. */
7647 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7648 if (ref
->next
== NULL
)
7651 if (ref
&& ref
->type
== REF_ARRAY
)
7652 ref
->u
.ar
.in_allocate
= true;
7654 if (!gfc_resolve_expr (e
))
7657 /* Make sure the expression is allocatable or a pointer. If it is
7658 pointer, the next-to-last reference must be a pointer. */
7662 sym
= e
->symtree
->n
.sym
;
7664 /* Check whether ultimate component is abstract and CLASS. */
7667 /* Is the allocate-object unlimited polymorphic? */
7668 unlimited
= UNLIMITED_POLY(e
);
7670 if (e
->expr_type
!= EXPR_VARIABLE
)
7673 attr
= gfc_expr_attr (e
);
7674 pointer
= attr
.pointer
;
7675 dimension
= attr
.dimension
;
7676 codimension
= attr
.codimension
;
7680 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7682 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7683 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7684 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7685 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7686 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7690 allocatable
= sym
->attr
.allocatable
;
7691 pointer
= sym
->attr
.pointer
;
7692 dimension
= sym
->attr
.dimension
;
7693 codimension
= sym
->attr
.codimension
;
7698 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7703 if (ref
->u
.ar
.codimen
> 0)
7706 for (n
= ref
->u
.ar
.dimen
;
7707 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7708 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7715 if (ref
->next
!= NULL
)
7723 gfc_error ("Coindexed allocatable object at %L",
7728 c
= ref
->u
.c
.component
;
7729 if (c
->ts
.type
== BT_CLASS
)
7731 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7732 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7733 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7734 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7735 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7739 allocatable
= c
->attr
.allocatable
;
7740 pointer
= c
->attr
.pointer
;
7741 dimension
= c
->attr
.dimension
;
7742 codimension
= c
->attr
.codimension
;
7743 is_abstract
= c
->attr
.abstract
;
7756 /* Check for F08:C628. */
7757 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7759 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7764 /* Some checks for the SOURCE tag. */
7767 /* Check F03:C631. */
7768 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7770 gfc_error ("Type of entity at %L is type incompatible with "
7771 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7775 /* Check F03:C632 and restriction following Note 6.18. */
7776 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7779 /* Check F03:C633. */
7780 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7782 gfc_error ("The allocate-object at %L and the source-expr at %L "
7783 "shall have the same kind type parameter",
7784 &e
->where
, &code
->expr3
->where
);
7788 /* Check F2008, C642. */
7789 if (code
->expr3
->ts
.type
== BT_DERIVED
7790 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7791 || (code
->expr3
->ts
.u
.derived
->from_intmod
7792 == INTMOD_ISO_FORTRAN_ENV
7793 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7794 == ISOFORTRAN_LOCK_TYPE
)))
7796 gfc_error ("The source-expr at %L shall neither be of type "
7797 "LOCK_TYPE nor have a LOCK_TYPE component if "
7798 "allocate-object at %L is a coarray",
7799 &code
->expr3
->where
, &e
->where
);
7803 /* Check TS18508, C702/C703. */
7804 if (code
->expr3
->ts
.type
== BT_DERIVED
7805 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7806 || (code
->expr3
->ts
.u
.derived
->from_intmod
7807 == INTMOD_ISO_FORTRAN_ENV
7808 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7809 == ISOFORTRAN_EVENT_TYPE
)))
7811 gfc_error ("The source-expr at %L shall neither be of type "
7812 "EVENT_TYPE nor have a EVENT_TYPE component if "
7813 "allocate-object at %L is a coarray",
7814 &code
->expr3
->where
, &e
->where
);
7819 /* Check F08:C629. */
7820 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7823 gcc_assert (e
->ts
.type
== BT_CLASS
);
7824 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7825 "type-spec or source-expr", sym
->name
, &e
->where
);
7829 /* Check F08:C632. */
7830 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7831 && !UNLIMITED_POLY (e
))
7835 if (!e
->ts
.u
.cl
->length
)
7838 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7839 code
->ext
.alloc
.ts
.u
.cl
->length
);
7840 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7842 gfc_error ("Allocating %s at %L with type-spec requires the same "
7843 "character-length parameter as in the declaration",
7844 sym
->name
, &e
->where
);
7849 /* In the variable definition context checks, gfc_expr_attr is used
7850 on the expression. This is fooled by the array specification
7851 present in e, thus we have to eliminate that one temporarily. */
7852 e2
= remove_last_array_ref (e
);
7855 t
= gfc_check_vardef_context (e2
, true, true, false,
7856 _("ALLOCATE object"));
7858 t
= gfc_check_vardef_context (e2
, false, true, false,
7859 _("ALLOCATE object"));
7864 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7865 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7867 /* For class arrays, the initialization with SOURCE is done
7868 using _copy and trans_call. It is convenient to exploit that
7869 when the allocated type is different from the declared type but
7870 no SOURCE exists by setting expr3. */
7871 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7873 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7874 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7875 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7877 /* We have to zero initialize the integer variable. */
7878 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7881 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7883 /* Make sure the vtab symbol is present when
7884 the module variables are generated. */
7885 gfc_typespec ts
= e
->ts
;
7887 ts
= code
->expr3
->ts
;
7888 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7889 ts
= code
->ext
.alloc
.ts
;
7891 /* Finding the vtab also publishes the type's symbol. Therefore this
7892 statement is necessary. */
7893 gfc_find_derived_vtab (ts
.u
.derived
);
7895 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7897 /* Again, make sure the vtab symbol is present when
7898 the module variables are generated. */
7899 gfc_typespec
*ts
= NULL
;
7901 ts
= &code
->expr3
->ts
;
7903 ts
= &code
->ext
.alloc
.ts
;
7907 /* Finding the vtab also publishes the type's symbol. Therefore this
7908 statement is necessary. */
7912 if (dimension
== 0 && codimension
== 0)
7915 /* Make sure the last reference node is an array specification. */
7917 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7918 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7923 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7924 "in ALLOCATE statement at %L", &e
->where
))
7926 if (code
->expr3
->rank
!= 0)
7927 *array_alloc_wo_spec
= true;
7930 gfc_error ("Array specification or array-valued SOURCE= "
7931 "expression required in ALLOCATE statement at %L",
7938 gfc_error ("Array specification required in ALLOCATE statement "
7939 "at %L", &e
->where
);
7944 /* Make sure that the array section reference makes sense in the
7945 context of an ALLOCATE specification. */
7950 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7952 switch (ar
->dimen_type
[i
])
7954 case DIMEN_THIS_IMAGE
:
7955 gfc_error ("Coarray specification required in ALLOCATE statement "
7956 "at %L", &e
->where
);
7960 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7962 /* If ar->stride[i] is NULL, we issued a previous error. */
7963 if (ar
->stride
[i
] == NULL
)
7964 gfc_error ("Bad array specification in ALLOCATE statement "
7965 "at %L", &e
->where
);
7968 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7970 gfc_error ("Upper cobound is less than lower cobound at %L",
7971 &ar
->start
[i
]->where
);
7977 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7979 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7980 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7982 gfc_error ("Upper cobound is less than lower cobound "
7983 "of 1 at %L", &ar
->start
[i
]->where
);
7993 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7999 for (i
= 0; i
< ar
->dimen
; i
++)
8001 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
8004 switch (ar
->dimen_type
[i
])
8010 if (ar
->start
[i
] != NULL
8011 && ar
->end
[i
] != NULL
8012 && ar
->stride
[i
] == NULL
)
8020 case DIMEN_THIS_IMAGE
:
8021 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8027 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8029 sym
= a
->expr
->symtree
->n
.sym
;
8031 /* TODO - check derived type components. */
8032 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
8035 if ((ar
->start
[i
] != NULL
8036 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
8037 || (ar
->end
[i
] != NULL
8038 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
8040 gfc_error ("%qs must not appear in the array specification at "
8041 "%L in the same ALLOCATE statement where it is "
8042 "itself allocated", sym
->name
, &ar
->where
);
8048 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
8050 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
8051 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
8053 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
8055 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
8056 "statement at %L", &e
->where
);
8062 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
8063 && ar
->stride
[i
] == NULL
)
8066 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8080 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8082 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8083 gfc_alloc
*a
, *p
, *q
;
8086 errmsg
= code
->expr2
;
8088 /* Check the stat variable. */
8091 gfc_check_vardef_context (stat
, false, false, false,
8092 _("STAT variable"));
8094 if ((stat
->ts
.type
!= BT_INTEGER
8095 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8096 || stat
->ref
->type
== REF_COMPONENT
)))
8098 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8099 "variable", &stat
->where
);
8101 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8102 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8104 gfc_ref
*ref1
, *ref2
;
8107 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8108 ref1
= ref1
->next
, ref2
= ref2
->next
)
8110 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8112 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8121 gfc_error ("Stat-variable at %L shall not be %sd within "
8122 "the same %s statement", &stat
->where
, fcn
, fcn
);
8128 /* Check the errmsg variable. */
8132 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8135 gfc_check_vardef_context (errmsg
, false, false, false,
8136 _("ERRMSG variable"));
8138 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8139 F18:R930 errmsg-variable is scalar-default-char-variable
8140 F18:R906 default-char-variable is variable
8141 F18:C906 default-char-variable shall be default character. */
8142 if ((errmsg
->ts
.type
!= BT_CHARACTER
8144 && (errmsg
->ref
->type
== REF_ARRAY
8145 || errmsg
->ref
->type
== REF_COMPONENT
)))
8147 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8148 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8149 "variable", &errmsg
->where
);
8151 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8152 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8154 gfc_ref
*ref1
, *ref2
;
8157 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8158 ref1
= ref1
->next
, ref2
= ref2
->next
)
8160 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8162 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8171 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8172 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8178 /* Check that an allocate-object appears only once in the statement. */
8180 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8183 for (q
= p
->next
; q
; q
= q
->next
)
8186 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8188 /* This is a potential collision. */
8189 gfc_ref
*pr
= pe
->ref
;
8190 gfc_ref
*qr
= qe
->ref
;
8192 /* Follow the references until
8193 a) They start to differ, in which case there is no error;
8194 you can deallocate a%b and a%c in a single statement
8195 b) Both of them stop, which is an error
8196 c) One of them stops, which is also an error. */
8199 if (pr
== NULL
&& qr
== NULL
)
8201 gfc_error ("Allocate-object at %L also appears at %L",
8202 &pe
->where
, &qe
->where
);
8205 else if (pr
!= NULL
&& qr
== NULL
)
8207 gfc_error ("Allocate-object at %L is subobject of"
8208 " object at %L", &pe
->where
, &qe
->where
);
8211 else if (pr
== NULL
&& qr
!= NULL
)
8213 gfc_error ("Allocate-object at %L is subobject of"
8214 " object at %L", &qe
->where
, &pe
->where
);
8217 /* Here, pr != NULL && qr != NULL */
8218 gcc_assert(pr
->type
== qr
->type
);
8219 if (pr
->type
== REF_ARRAY
)
8221 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8223 gcc_assert (qr
->type
== REF_ARRAY
);
8225 if (pr
->next
&& qr
->next
)
8228 gfc_array_ref
*par
= &(pr
->u
.ar
);
8229 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8231 for (i
=0; i
<par
->dimen
; i
++)
8233 if ((par
->start
[i
] != NULL
8234 || qar
->start
[i
] != NULL
)
8235 && gfc_dep_compare_expr (par
->start
[i
],
8236 qar
->start
[i
]) != 0)
8243 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8256 if (strcmp (fcn
, "ALLOCATE") == 0)
8258 bool arr_alloc_wo_spec
= false;
8260 /* Resolving the expr3 in the loop over all objects to allocate would
8261 execute loop invariant code for each loop item. Therefore do it just
8263 if (code
->expr3
&& code
->expr3
->mold
8264 && code
->expr3
->ts
.type
== BT_DERIVED
)
8266 /* Default initialization via MOLD (non-polymorphic). */
8267 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8270 gfc_resolve_expr (rhs
);
8271 gfc_free_expr (code
->expr3
);
8275 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8276 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8278 if (arr_alloc_wo_spec
&& code
->expr3
)
8280 /* Mark the allocate to have to take the array specification
8282 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8287 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8288 resolve_deallocate_expr (a
->expr
);
8293 /************ SELECT CASE resolution subroutines ************/
8295 /* Callback function for our mergesort variant. Determines interval
8296 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8297 op1 > op2. Assumes we're not dealing with the default case.
8298 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8299 There are nine situations to check. */
8302 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8306 if (op1
->low
== NULL
) /* op1 = (:L) */
8308 /* op2 = (:N), so overlap. */
8310 /* op2 = (M:) or (M:N), L < M */
8311 if (op2
->low
!= NULL
8312 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8315 else if (op1
->high
== NULL
) /* op1 = (K:) */
8317 /* op2 = (M:), so overlap. */
8319 /* op2 = (:N) or (M:N), K > N */
8320 if (op2
->high
!= NULL
8321 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8324 else /* op1 = (K:L) */
8326 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8327 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8329 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8330 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8332 else /* op2 = (M:N) */
8336 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8339 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8348 /* Merge-sort a double linked case list, detecting overlap in the
8349 process. LIST is the head of the double linked case list before it
8350 is sorted. Returns the head of the sorted list if we don't see any
8351 overlap, or NULL otherwise. */
8354 check_case_overlap (gfc_case
*list
)
8356 gfc_case
*p
, *q
, *e
, *tail
;
8357 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8359 /* If the passed list was empty, return immediately. */
8366 /* Loop unconditionally. The only exit from this loop is a return
8367 statement, when we've finished sorting the case list. */
8374 /* Count the number of merges we do in this pass. */
8377 /* Loop while there exists a merge to be done. */
8382 /* Count this merge. */
8385 /* Cut the list in two pieces by stepping INSIZE places
8386 forward in the list, starting from P. */
8389 for (i
= 0; i
< insize
; i
++)
8398 /* Now we have two lists. Merge them! */
8399 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8401 /* See from which the next case to merge comes from. */
8404 /* P is empty so the next case must come from Q. */
8409 else if (qsize
== 0 || q
== NULL
)
8418 cmp
= compare_cases (p
, q
);
8421 /* The whole case range for P is less than the
8429 /* The whole case range for Q is greater than
8430 the case range for P. */
8437 /* The cases overlap, or they are the same
8438 element in the list. Either way, we must
8439 issue an error and get the next case from P. */
8440 /* FIXME: Sort P and Q by line number. */
8441 gfc_error ("CASE label at %L overlaps with CASE "
8442 "label at %L", &p
->where
, &q
->where
);
8450 /* Add the next element to the merged list. */
8459 /* P has now stepped INSIZE places along, and so has Q. So
8460 they're the same. */
8465 /* If we have done only one merge or none at all, we've
8466 finished sorting the cases. */
8475 /* Otherwise repeat, merging lists twice the size. */
8481 /* Check to see if an expression is suitable for use in a CASE statement.
8482 Makes sure that all case expressions are scalar constants of the same
8483 type. Return false if anything is wrong. */
8486 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8488 if (e
== NULL
) return true;
8490 if (e
->ts
.type
!= case_expr
->ts
.type
)
8492 gfc_error ("Expression in CASE statement at %L must be of type %s",
8493 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8497 /* C805 (R808) For a given case-construct, each case-value shall be of
8498 the same type as case-expr. For character type, length differences
8499 are allowed, but the kind type parameters shall be the same. */
8501 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8503 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8504 &e
->where
, case_expr
->ts
.kind
);
8508 /* Convert the case value kind to that of case expression kind,
8511 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8512 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8516 gfc_error ("Expression in CASE statement at %L must be scalar",
8525 /* Given a completely parsed select statement, we:
8527 - Validate all expressions and code within the SELECT.
8528 - Make sure that the selection expression is not of the wrong type.
8529 - Make sure that no case ranges overlap.
8530 - Eliminate unreachable cases and unreachable code resulting from
8531 removing case labels.
8533 The standard does allow unreachable cases, e.g. CASE (5:3). But
8534 they are a hassle for code generation, and to prevent that, we just
8535 cut them out here. This is not necessary for overlapping cases
8536 because they are illegal and we never even try to generate code.
8538 We have the additional caveat that a SELECT construct could have
8539 been a computed GOTO in the source code. Fortunately we can fairly
8540 easily work around that here: The case_expr for a "real" SELECT CASE
8541 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8542 we have to do is make sure that the case_expr is a scalar integer
8546 resolve_select (gfc_code
*code
, bool select_type
)
8549 gfc_expr
*case_expr
;
8550 gfc_case
*cp
, *default_case
, *tail
, *head
;
8551 int seen_unreachable
;
8557 if (code
->expr1
== NULL
)
8559 /* This was actually a computed GOTO statement. */
8560 case_expr
= code
->expr2
;
8561 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8562 gfc_error ("Selection expression in computed GOTO statement "
8563 "at %L must be a scalar integer expression",
8566 /* Further checking is not necessary because this SELECT was built
8567 by the compiler, so it should always be OK. Just move the
8568 case_expr from expr2 to expr so that we can handle computed
8569 GOTOs as normal SELECTs from here on. */
8570 code
->expr1
= code
->expr2
;
8575 case_expr
= code
->expr1
;
8576 type
= case_expr
->ts
.type
;
8579 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8581 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8582 &case_expr
->where
, gfc_typename (case_expr
));
8584 /* Punt. Going on here just produce more garbage error messages. */
8589 if (!select_type
&& case_expr
->rank
!= 0)
8591 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8592 "expression", &case_expr
->where
);
8598 /* Raise a warning if an INTEGER case value exceeds the range of
8599 the case-expr. Later, all expressions will be promoted to the
8600 largest kind of all case-labels. */
8602 if (type
== BT_INTEGER
)
8603 for (body
= code
->block
; body
; body
= body
->block
)
8604 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8607 && gfc_check_integer_range (cp
->low
->value
.integer
,
8608 case_expr
->ts
.kind
) != ARITH_OK
)
8609 gfc_warning (0, "Expression in CASE statement at %L is "
8610 "not in the range of %s", &cp
->low
->where
,
8611 gfc_typename (case_expr
));
8614 && cp
->low
!= cp
->high
8615 && gfc_check_integer_range (cp
->high
->value
.integer
,
8616 case_expr
->ts
.kind
) != ARITH_OK
)
8617 gfc_warning (0, "Expression in CASE statement at %L is "
8618 "not in the range of %s", &cp
->high
->where
,
8619 gfc_typename (case_expr
));
8622 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8623 of the SELECT CASE expression and its CASE values. Walk the lists
8624 of case values, and if we find a mismatch, promote case_expr to
8625 the appropriate kind. */
8627 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8629 for (body
= code
->block
; body
; body
= body
->block
)
8631 /* Walk the case label list. */
8632 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8634 /* Intercept the DEFAULT case. It does not have a kind. */
8635 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8638 /* Unreachable case ranges are discarded, so ignore. */
8639 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8640 && cp
->low
!= cp
->high
8641 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8645 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8646 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8648 if (cp
->high
!= NULL
8649 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8650 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8655 /* Assume there is no DEFAULT case. */
8656 default_case
= NULL
;
8661 for (body
= code
->block
; body
; body
= body
->block
)
8663 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8665 seen_unreachable
= 0;
8667 /* Walk the case label list, making sure that all case labels
8669 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8671 /* Count the number of cases in the whole construct. */
8674 /* Intercept the DEFAULT case. */
8675 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8677 if (default_case
!= NULL
)
8679 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8680 "by a second DEFAULT CASE at %L",
8681 &default_case
->where
, &cp
->where
);
8692 /* Deal with single value cases and case ranges. Errors are
8693 issued from the validation function. */
8694 if (!validate_case_label_expr (cp
->low
, case_expr
)
8695 || !validate_case_label_expr (cp
->high
, case_expr
))
8701 if (type
== BT_LOGICAL
8702 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8703 || cp
->low
!= cp
->high
))
8705 gfc_error ("Logical range in CASE statement at %L is not "
8706 "allowed", &cp
->low
->where
);
8711 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8714 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8715 if (value
& seen_logical
)
8717 gfc_error ("Constant logical value in CASE statement "
8718 "is repeated at %L",
8723 seen_logical
|= value
;
8726 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8727 && cp
->low
!= cp
->high
8728 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8730 if (warn_surprising
)
8731 gfc_warning (OPT_Wsurprising
,
8732 "Range specification at %L can never be matched",
8735 cp
->unreachable
= 1;
8736 seen_unreachable
= 1;
8740 /* If the case range can be matched, it can also overlap with
8741 other cases. To make sure it does not, we put it in a
8742 double linked list here. We sort that with a merge sort
8743 later on to detect any overlapping cases. */
8747 head
->right
= head
->left
= NULL
;
8752 tail
->right
->left
= tail
;
8759 /* It there was a failure in the previous case label, give up
8760 for this case label list. Continue with the next block. */
8764 /* See if any case labels that are unreachable have been seen.
8765 If so, we eliminate them. This is a bit of a kludge because
8766 the case lists for a single case statement (label) is a
8767 single forward linked lists. */
8768 if (seen_unreachable
)
8770 /* Advance until the first case in the list is reachable. */
8771 while (body
->ext
.block
.case_list
!= NULL
8772 && body
->ext
.block
.case_list
->unreachable
)
8774 gfc_case
*n
= body
->ext
.block
.case_list
;
8775 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8777 gfc_free_case_list (n
);
8780 /* Strip all other unreachable cases. */
8781 if (body
->ext
.block
.case_list
)
8783 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8785 if (cp
->next
->unreachable
)
8787 gfc_case
*n
= cp
->next
;
8788 cp
->next
= cp
->next
->next
;
8790 gfc_free_case_list (n
);
8797 /* See if there were overlapping cases. If the check returns NULL,
8798 there was overlap. In that case we don't do anything. If head
8799 is non-NULL, we prepend the DEFAULT case. The sorted list can
8800 then used during code generation for SELECT CASE constructs with
8801 a case expression of a CHARACTER type. */
8804 head
= check_case_overlap (head
);
8806 /* Prepend the default_case if it is there. */
8807 if (head
!= NULL
&& default_case
)
8809 default_case
->left
= NULL
;
8810 default_case
->right
= head
;
8811 head
->left
= default_case
;
8815 /* Eliminate dead blocks that may be the result if we've seen
8816 unreachable case labels for a block. */
8817 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8819 if (body
->block
->ext
.block
.case_list
== NULL
)
8821 /* Cut the unreachable block from the code chain. */
8822 gfc_code
*c
= body
->block
;
8823 body
->block
= c
->block
;
8825 /* Kill the dead block, but not the blocks below it. */
8827 gfc_free_statements (c
);
8831 /* More than two cases is legal but insane for logical selects.
8832 Issue a warning for it. */
8833 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8834 gfc_warning (OPT_Wsurprising
,
8835 "Logical SELECT CASE block at %L has more that two cases",
8840 /* Check if a derived type is extensible. */
8843 gfc_type_is_extensible (gfc_symbol
*sym
)
8845 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8846 || (sym
->attr
.is_class
8847 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8852 resolve_types (gfc_namespace
*ns
);
8854 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8855 correct as well as possibly the array-spec. */
8858 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8862 gcc_assert (sym
->assoc
);
8863 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8865 /* If this is for SELECT TYPE, the target may not yet be set. In that
8866 case, return. Resolution will be called later manually again when
8868 target
= sym
->assoc
->target
;
8871 gcc_assert (!sym
->assoc
->dangling
);
8873 if (resolve_target
&& !gfc_resolve_expr (target
))
8876 /* For variable targets, we get some attributes from the target. */
8877 if (target
->expr_type
== EXPR_VARIABLE
)
8879 gfc_symbol
*tsym
, *dsym
;
8881 gcc_assert (target
->symtree
);
8882 tsym
= target
->symtree
->n
.sym
;
8884 if (gfc_expr_attr (target
).proc_pointer
)
8886 gfc_error ("Associating entity %qs at %L is a procedure pointer",
8887 tsym
->name
, &target
->where
);
8891 if (tsym
->attr
.flavor
== FL_PROCEDURE
&& tsym
->generic
8892 && (dsym
= gfc_find_dt_in_generic (tsym
)) != NULL
8893 && dsym
->attr
.flavor
== FL_DERIVED
)
8895 gfc_error ("Derived type %qs cannot be used as a variable at %L",
8896 tsym
->name
, &target
->where
);
8900 if (tsym
->attr
.flavor
== FL_PROCEDURE
)
8902 bool is_error
= true;
8903 if (tsym
->attr
.function
&& tsym
->result
== tsym
)
8904 for (gfc_namespace
*ns
= sym
->ns
; ns
; ns
= ns
->parent
)
8905 if (tsym
== ns
->proc_name
)
8912 gfc_error ("Associating entity %qs at %L is a procedure name",
8913 tsym
->name
, &target
->where
);
8918 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8919 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8921 sym
->attr
.target
= tsym
->attr
.target
8922 || gfc_expr_attr (target
).pointer
;
8923 if (is_subref_array (target
))
8924 sym
->attr
.subref_array_pointer
= 1;
8926 else if (target
->ts
.type
== BT_PROCEDURE
)
8928 gfc_error ("Associating selector-expression at %L yields a procedure",
8933 if (target
->expr_type
== EXPR_NULL
)
8935 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8938 else if (target
->ts
.type
== BT_UNKNOWN
)
8940 gfc_error ("Selector at %L has no type", &target
->where
);
8944 /* Get type if this was not already set. Note that it can be
8945 some other type than the target in case this is a SELECT TYPE
8946 selector! So we must not update when the type is already there. */
8947 if (sym
->ts
.type
== BT_UNKNOWN
)
8948 sym
->ts
= target
->ts
;
8950 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8952 /* See if this is a valid association-to-variable. */
8953 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8954 && !gfc_has_vector_subscript (target
));
8956 /* Finally resolve if this is an array or not. */
8957 if (sym
->attr
.dimension
&& target
->rank
== 0)
8959 /* primary.c makes the assumption that a reference to an associate
8960 name followed by a left parenthesis is an array reference. */
8961 if (sym
->ts
.type
!= BT_CHARACTER
)
8962 gfc_error ("Associate-name %qs at %L is used as array",
8963 sym
->name
, &sym
->declared_at
);
8964 sym
->attr
.dimension
= 0;
8969 /* We cannot deal with class selectors that need temporaries. */
8970 if (target
->ts
.type
== BT_CLASS
8971 && gfc_ref_needs_temporary_p (target
->ref
))
8973 gfc_error ("CLASS selector at %L needs a temporary which is not "
8974 "yet implemented", &target
->where
);
8978 if (target
->ts
.type
== BT_CLASS
)
8979 gfc_fix_class_refs (target
);
8981 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8984 /* The rank may be incorrectly guessed at parsing, therefore make sure
8985 it is corrected now. */
8986 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8989 sym
->as
= gfc_get_array_spec ();
8991 as
->rank
= target
->rank
;
8992 as
->type
= AS_DEFERRED
;
8993 as
->corank
= gfc_get_corank (target
);
8994 sym
->attr
.dimension
= 1;
8995 if (as
->corank
!= 0)
8996 sym
->attr
.codimension
= 1;
8998 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
9000 if (!CLASS_DATA (sym
)->as
)
9001 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
9002 as
= CLASS_DATA (sym
)->as
;
9003 as
->rank
= target
->rank
;
9004 as
->type
= AS_DEFERRED
;
9005 as
->corank
= gfc_get_corank (target
);
9006 CLASS_DATA (sym
)->attr
.dimension
= 1;
9007 if (as
->corank
!= 0)
9008 CLASS_DATA (sym
)->attr
.codimension
= 1;
9011 else if (!sym
->attr
.select_rank_temporary
)
9013 /* target's rank is 0, but the type of the sym is still array valued,
9014 which has to be corrected. */
9015 if (sym
->ts
.type
== BT_CLASS
9016 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
9019 symbol_attribute attr
;
9020 /* The associated variable's type is still the array type
9021 correct this now. */
9022 gfc_typespec
*ts
= &target
->ts
;
9025 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
9030 ts
= &ref
->u
.c
.component
->ts
;
9033 if (ts
->type
== BT_CLASS
)
9034 ts
= &ts
->u
.derived
->components
->ts
;
9040 /* Create a scalar instance of the current class type. Because the
9041 rank of a class array goes into its name, the type has to be
9042 rebuild. The alternative of (re-)setting just the attributes
9043 and as in the current type, destroys the type also in other
9047 sym
->ts
.type
= BT_CLASS
;
9048 attr
= CLASS_DATA (sym
)->attr
;
9050 attr
.associate_var
= 1;
9051 attr
.dimension
= attr
.codimension
= 0;
9052 attr
.class_pointer
= 1;
9053 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
9055 /* Make sure the _vptr is set. */
9056 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
9057 if (c
->ts
.u
.derived
== NULL
)
9058 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
9059 CLASS_DATA (sym
)->attr
.pointer
= 1;
9060 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
9061 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
9062 gfc_commit_symbol (sym
->ts
.u
.derived
);
9063 /* _vptr now has the _vtab in it, change it to the _vtype. */
9064 if (c
->ts
.u
.derived
->attr
.vtab
)
9065 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
9066 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
9067 resolve_types (c
->ts
.u
.derived
->ns
);
9071 /* Mark this as an associate variable. */
9072 sym
->attr
.associate_var
= 1;
9074 /* Fix up the type-spec for CHARACTER types. */
9075 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9078 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9080 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9081 && target
->symtree
->n
.sym
->attr
.dummy
9082 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9084 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9085 sym
->ts
.deferred
= 1;
9088 if (!sym
->ts
.u
.cl
->length
9089 && !sym
->ts
.deferred
9090 && target
->expr_type
== EXPR_CONSTANT
)
9092 sym
->ts
.u
.cl
->length
=
9093 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9094 target
->value
.character
.length
);
9096 else if ((!sym
->ts
.u
.cl
->length
9097 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9098 && target
->expr_type
!= EXPR_VARIABLE
)
9100 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9101 sym
->ts
.deferred
= 1;
9103 /* This is reset in trans-stmt.c after the assignment
9104 of the target expression to the associate name. */
9105 sym
->attr
.allocatable
= 1;
9109 /* If the target is a good class object, so is the associate variable. */
9110 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9111 sym
->attr
.class_ok
= 1;
9115 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9116 array reference, where necessary. The symbols are artificial and so
9117 the dimension attribute and arrayspec can also be set. In addition,
9118 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9119 This is corrected here as well.*/
9122 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9123 int rank
, gfc_ref
*ref
)
9125 gfc_ref
*nref
= (*expr1
)->ref
;
9126 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9127 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9128 (*expr1
)->rank
= rank
;
9129 if (sym1
->ts
.type
== BT_CLASS
)
9131 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9132 (*expr1
)->ts
= sym1
->ts
;
9134 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9135 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9136 CLASS_DATA (sym1
)->as
9137 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9141 sym1
->attr
.dimension
= 1;
9142 if (sym1
->as
== NULL
&& sym2
)
9143 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9146 for (; nref
; nref
= nref
->next
)
9147 if (nref
->next
== NULL
)
9150 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9151 nref
->next
= gfc_copy_ref (ref
);
9152 else if (ref
&& !nref
)
9153 (*expr1
)->ref
= gfc_copy_ref (ref
);
9158 build_loc_call (gfc_expr
*sym_expr
)
9161 loc_call
= gfc_get_expr ();
9162 loc_call
->expr_type
= EXPR_FUNCTION
;
9163 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9164 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9165 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9166 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9167 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9168 loc_call
->ts
.type
= BT_INTEGER
;
9169 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9170 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9171 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9172 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9173 loc_call
->where
= sym_expr
->where
;
9177 /* Resolve a SELECT TYPE statement. */
9180 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9182 gfc_symbol
*selector_type
;
9183 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9184 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9187 char name
[GFC_MAX_SYMBOL_LEN
];
9191 gfc_ref
* ref
= NULL
;
9192 gfc_expr
*selector_expr
= NULL
;
9194 ns
= code
->ext
.block
.ns
;
9197 /* Check for F03:C813. */
9198 if (code
->expr1
->ts
.type
!= BT_CLASS
9199 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9201 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9202 "at %L", &code
->loc
);
9206 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9211 gfc_ref
*ref2
= NULL
;
9212 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9213 if (ref
->type
== REF_COMPONENT
9214 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9219 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9220 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9221 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9225 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9226 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9227 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9230 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9231 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9233 /* F2008: C803 The selector expression must not be coindexed. */
9234 if (gfc_is_coindexed (code
->expr2
))
9236 gfc_error ("Selector at %L must not be coindexed",
9237 &code
->expr2
->where
);
9244 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9246 if (gfc_is_coindexed (code
->expr1
))
9248 gfc_error ("Selector at %L must not be coindexed",
9249 &code
->expr1
->where
);
9254 /* Loop over TYPE IS / CLASS IS cases. */
9255 for (body
= code
->block
; body
; body
= body
->block
)
9257 c
= body
->ext
.block
.case_list
;
9261 /* Check for repeated cases. */
9262 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9264 gfc_case
*d
= tail
->ext
.block
.case_list
;
9268 if (c
->ts
.type
== d
->ts
.type
9269 && ((c
->ts
.type
== BT_DERIVED
9270 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9271 && !strcmp (c
->ts
.u
.derived
->name
,
9272 d
->ts
.u
.derived
->name
))
9273 || c
->ts
.type
== BT_UNKNOWN
9274 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9275 && c
->ts
.kind
== d
->ts
.kind
)))
9277 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9278 &c
->where
, &d
->where
);
9284 /* Check F03:C815. */
9285 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9286 && !selector_type
->attr
.unlimited_polymorphic
9287 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9289 gfc_error ("Derived type %qs at %L must be extensible",
9290 c
->ts
.u
.derived
->name
, &c
->where
);
9295 /* Check F03:C816. */
9296 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9297 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9298 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9300 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9301 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9302 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9304 gfc_error ("Unexpected intrinsic type %qs at %L",
9305 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9310 /* Check F03:C814. */
9311 if (c
->ts
.type
== BT_CHARACTER
9312 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9314 gfc_error ("The type-spec at %L shall specify that each length "
9315 "type parameter is assumed", &c
->where
);
9320 /* Intercept the DEFAULT case. */
9321 if (c
->ts
.type
== BT_UNKNOWN
)
9323 /* Check F03:C818. */
9326 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9327 "by a second DEFAULT CASE at %L",
9328 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9333 default_case
= body
;
9340 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9341 target if present. If there are any EXIT statements referring to the
9342 SELECT TYPE construct, this is no problem because the gfc_code
9343 reference stays the same and EXIT is equally possible from the BLOCK
9344 it is changed to. */
9345 code
->op
= EXEC_BLOCK
;
9348 gfc_association_list
* assoc
;
9350 assoc
= gfc_get_association_list ();
9351 assoc
->st
= code
->expr1
->symtree
;
9352 assoc
->target
= gfc_copy_expr (code
->expr2
);
9353 assoc
->target
->where
= code
->expr2
->where
;
9354 /* assoc->variable will be set by resolve_assoc_var. */
9356 code
->ext
.block
.assoc
= assoc
;
9357 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9359 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9362 code
->ext
.block
.assoc
= NULL
;
9364 /* Ensure that the selector rank and arrayspec are available to
9365 correct expressions in which they might be missing. */
9366 if (code
->expr2
&& code
->expr2
->rank
)
9368 rank
= code
->expr2
->rank
;
9369 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9370 if (ref
->next
== NULL
)
9372 if (ref
&& ref
->type
== REF_ARRAY
)
9373 ref
= gfc_copy_ref (ref
);
9375 /* Fixup expr1 if necessary. */
9377 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9379 else if (code
->expr1
->rank
)
9381 rank
= code
->expr1
->rank
;
9382 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9383 if (ref
->next
== NULL
)
9385 if (ref
&& ref
->type
== REF_ARRAY
)
9386 ref
= gfc_copy_ref (ref
);
9389 /* Add EXEC_SELECT to switch on type. */
9390 new_st
= gfc_get_code (code
->op
);
9391 new_st
->expr1
= code
->expr1
;
9392 new_st
->expr2
= code
->expr2
;
9393 new_st
->block
= code
->block
;
9394 code
->expr1
= code
->expr2
= NULL
;
9399 ns
->code
->next
= new_st
;
9401 code
->op
= EXEC_SELECT_TYPE
;
9403 /* Use the intrinsic LOC function to generate an integer expression
9404 for the vtable of the selector. Note that the rank of the selector
9405 expression has to be set to zero. */
9406 gfc_add_vptr_component (code
->expr1
);
9407 code
->expr1
->rank
= 0;
9408 code
->expr1
= build_loc_call (code
->expr1
);
9409 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9411 /* Loop over TYPE IS / CLASS IS cases. */
9412 for (body
= code
->block
; body
; body
= body
->block
)
9416 c
= body
->ext
.block
.case_list
;
9418 /* Generate an index integer expression for address of the
9419 TYPE/CLASS vtable and store it in c->low. The hash expression
9420 is stored in c->high and is used to resolve intrinsic cases. */
9421 if (c
->ts
.type
!= BT_UNKNOWN
)
9423 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9425 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9427 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9428 c
->ts
.u
.derived
->hash_value
);
9432 vtab
= gfc_find_vtab (&c
->ts
);
9433 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9434 e
= CLASS_DATA (vtab
)->initializer
;
9435 c
->high
= gfc_copy_expr (e
);
9436 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9439 ts
.kind
= gfc_integer_4_kind
;
9440 ts
.type
= BT_INTEGER
;
9441 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9445 e
= gfc_lval_expr_from_sym (vtab
);
9446 c
->low
= build_loc_call (e
);
9451 /* Associate temporary to selector. This should only be done
9452 when this case is actually true, so build a new ASSOCIATE
9453 that does precisely this here (instead of using the
9456 if (c
->ts
.type
== BT_CLASS
)
9457 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9458 else if (c
->ts
.type
== BT_DERIVED
)
9459 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9460 else if (c
->ts
.type
== BT_CHARACTER
)
9462 HOST_WIDE_INT charlen
= 0;
9463 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9464 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9465 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9466 snprintf (name
, sizeof (name
),
9467 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9468 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9471 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9474 st
= gfc_find_symtree (ns
->sym_root
, name
);
9475 gcc_assert (st
->n
.sym
->assoc
);
9476 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9477 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9478 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9480 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9481 /* Fixup the target expression if necessary. */
9483 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9486 new_st
= gfc_get_code (EXEC_BLOCK
);
9487 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9488 new_st
->ext
.block
.ns
->code
= body
->next
;
9489 body
->next
= new_st
;
9491 /* Chain in the new list only if it is marked as dangling. Otherwise
9492 there is a CASE label overlap and this is already used. Just ignore,
9493 the error is diagnosed elsewhere. */
9494 if (st
->n
.sym
->assoc
->dangling
)
9496 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9497 st
->n
.sym
->assoc
->dangling
= 0;
9500 resolve_assoc_var (st
->n
.sym
, false);
9503 /* Take out CLASS IS cases for separate treatment. */
9505 while (body
&& body
->block
)
9507 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9509 /* Add to class_is list. */
9510 if (class_is
== NULL
)
9512 class_is
= body
->block
;
9517 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9518 tail
->block
= body
->block
;
9521 /* Remove from EXEC_SELECT list. */
9522 body
->block
= body
->block
->block
;
9535 /* Add a default case to hold the CLASS IS cases. */
9536 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9537 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9539 tail
->ext
.block
.case_list
= gfc_get_case ();
9540 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9542 default_case
= tail
;
9545 /* More than one CLASS IS block? */
9546 if (class_is
->block
)
9550 /* Sort CLASS IS blocks by extension level. */
9554 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9557 /* F03:C817 (check for doubles). */
9558 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9559 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9561 gfc_error ("Double CLASS IS block in SELECT TYPE "
9563 &c2
->ext
.block
.case_list
->where
);
9566 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9567 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9570 (*c1
)->block
= c2
->block
;
9580 /* Generate IF chain. */
9581 if_st
= gfc_get_code (EXEC_IF
);
9583 for (body
= class_is
; body
; body
= body
->block
)
9585 new_st
->block
= gfc_get_code (EXEC_IF
);
9586 new_st
= new_st
->block
;
9587 /* Set up IF condition: Call _gfortran_is_extension_of. */
9588 new_st
->expr1
= gfc_get_expr ();
9589 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9590 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9591 new_st
->expr1
->ts
.kind
= 4;
9592 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9593 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9594 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9595 /* Set up arguments. */
9596 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9597 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9598 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9599 new_st
->expr1
->where
= code
->loc
;
9600 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9601 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9602 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9603 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9604 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9605 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9606 new_st
->next
= body
->next
;
9608 if (default_case
->next
)
9610 new_st
->block
= gfc_get_code (EXEC_IF
);
9611 new_st
= new_st
->block
;
9612 new_st
->next
= default_case
->next
;
9615 /* Replace CLASS DEFAULT code by the IF chain. */
9616 default_case
->next
= if_st
;
9619 /* Resolve the internal code. This cannot be done earlier because
9620 it requires that the sym->assoc of selectors is set already. */
9621 gfc_current_ns
= ns
;
9622 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9623 gfc_current_ns
= old_ns
;
9630 /* Resolve a SELECT RANK statement. */
9633 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9636 gfc_code
*body
, *new_st
, *tail
;
9638 char tname
[GFC_MAX_SYMBOL_LEN
+ 7];
9639 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9641 gfc_expr
*selector_expr
= NULL
;
9643 HOST_WIDE_INT charlen
= 0;
9645 ns
= code
->ext
.block
.ns
;
9648 code
->op
= EXEC_BLOCK
;
9651 gfc_association_list
* assoc
;
9653 assoc
= gfc_get_association_list ();
9654 assoc
->st
= code
->expr1
->symtree
;
9655 assoc
->target
= gfc_copy_expr (code
->expr2
);
9656 assoc
->target
->where
= code
->expr2
->where
;
9657 /* assoc->variable will be set by resolve_assoc_var. */
9659 code
->ext
.block
.assoc
= assoc
;
9660 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9662 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9665 code
->ext
.block
.assoc
= NULL
;
9667 /* Loop over RANK cases. Note that returning on the errors causes a
9668 cascade of further errors because the case blocks do not compile
9670 for (body
= code
->block
; body
; body
= body
->block
)
9672 c
= body
->ext
.block
.case_list
;
9674 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9678 /* Check for repeated cases. */
9679 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9681 gfc_case
*d
= tail
->ext
.block
.case_list
;
9687 /* Check F2018: C1153. */
9688 if (!c
->low
&& !d
->low
)
9689 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9690 &c
->where
, &d
->where
);
9692 if (!c
->low
|| !d
->low
)
9695 /* Check F2018: C1153. */
9696 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9697 if ((case_value
== case_value2
) && case_value
== -1)
9698 gfc_error ("RANK (*) at %L is repeated at %L",
9699 &c
->where
, &d
->where
);
9700 else if (case_value
== case_value2
)
9701 gfc_error ("RANK (%i) at %L is repeated at %L",
9702 case_value
, &c
->where
, &d
->where
);
9708 /* Check F2018: C1155. */
9709 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9710 || gfc_expr_attr (code
->expr1
).pointer
))
9711 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9712 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9714 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9715 || gfc_expr_attr (code
->expr1
).pointer
))
9716 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9717 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9720 /* Add EXEC_SELECT to switch on rank. */
9721 new_st
= gfc_get_code (code
->op
);
9722 new_st
->expr1
= code
->expr1
;
9723 new_st
->expr2
= code
->expr2
;
9724 new_st
->block
= code
->block
;
9725 code
->expr1
= code
->expr2
= NULL
;
9730 ns
->code
->next
= new_st
;
9732 code
->op
= EXEC_SELECT_RANK
;
9734 selector_expr
= code
->expr1
;
9736 /* Loop over SELECT RANK cases. */
9737 for (body
= code
->block
; body
; body
= body
->block
)
9739 c
= body
->ext
.block
.case_list
;
9742 /* Pass on the default case. */
9746 /* Associate temporary to selector. This should only be done
9747 when this case is actually true, so build a new ASSOCIATE
9748 that does precisely this here (instead of using the
9750 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9751 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9752 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9754 if (c
->ts
.type
== BT_CLASS
)
9755 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9756 else if (c
->ts
.type
== BT_DERIVED
)
9757 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9758 else if (c
->ts
.type
!= BT_CHARACTER
)
9759 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9761 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9762 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9764 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9765 if (case_value
>= 0)
9766 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9768 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9770 st
= gfc_find_symtree (ns
->sym_root
, name
);
9771 gcc_assert (st
->n
.sym
->assoc
);
9773 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9774 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9776 new_st
= gfc_get_code (EXEC_BLOCK
);
9777 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9778 new_st
->ext
.block
.ns
->code
= body
->next
;
9779 body
->next
= new_st
;
9781 /* Chain in the new list only if it is marked as dangling. Otherwise
9782 there is a CASE label overlap and this is already used. Just ignore,
9783 the error is diagnosed elsewhere. */
9784 if (st
->n
.sym
->assoc
->dangling
)
9786 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9787 st
->n
.sym
->assoc
->dangling
= 0;
9790 resolve_assoc_var (st
->n
.sym
, false);
9793 gfc_current_ns
= ns
;
9794 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9795 gfc_current_ns
= old_ns
;
9799 /* Resolve a transfer statement. This is making sure that:
9800 -- a derived type being transferred has only non-pointer components
9801 -- a derived type being transferred doesn't have private components, unless
9802 it's being transferred from the module where the type was defined
9803 -- we're not trying to transfer a whole assumed size array. */
9806 resolve_transfer (gfc_code
*code
)
9808 gfc_symbol
*sym
, *derived
;
9812 bool formatted
= false;
9813 gfc_dt
*dt
= code
->ext
.dt
;
9814 gfc_symbol
*dtio_sub
= NULL
;
9818 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9819 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9820 exp
= exp
->value
.op
.op1
;
9822 if (exp
&& exp
->expr_type
== EXPR_NULL
9825 gfc_error ("Invalid context for NULL () intrinsic at %L",
9830 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9831 && exp
->expr_type
!= EXPR_FUNCTION
9832 && exp
->expr_type
!= EXPR_STRUCTURE
))
9835 /* If we are reading, the variable will be changed. Note that
9836 code->ext.dt may be NULL if the TRANSFER is related to
9837 an INQUIRE statement -- but in this case, we are not reading, either. */
9838 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9839 && !gfc_check_vardef_context (exp
, false, false, false,
9843 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9844 || exp
->expr_type
== EXPR_FUNCTION
9845 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9847 /* Go to actual component transferred. */
9848 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9849 if (ref
->type
== REF_COMPONENT
)
9850 ts
= &ref
->u
.c
.component
->ts
;
9852 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9853 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9855 derived
= ts
->u
.derived
;
9857 /* Determine when to use the formatted DTIO procedure. */
9858 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9861 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9862 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9863 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9865 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9868 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9869 /* Check to see if this is a nested DTIO call, with the
9870 dummy as the io-list object. */
9871 if (sym
&& sym
== dtio_sub
&& sym
->formal
9872 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9873 && exp
->ref
== NULL
)
9875 if (!sym
->attr
.recursive
)
9877 gfc_error ("DTIO %s procedure at %L must be recursive",
9878 sym
->name
, &sym
->declared_at
);
9885 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9887 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9888 "it is processed by a defined input/output procedure",
9893 if (ts
->type
== BT_DERIVED
)
9895 /* Check that transferred derived type doesn't contain POINTER
9896 components unless it is processed by a defined input/output
9898 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9900 gfc_error ("Data transfer element at %L cannot have POINTER "
9901 "components unless it is processed by a defined "
9902 "input/output procedure", &code
->loc
);
9907 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9909 gfc_error ("Data transfer element at %L cannot have "
9910 "procedure pointer components", &code
->loc
);
9914 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9916 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9917 "components unless it is processed by a defined "
9918 "input/output procedure", &code
->loc
);
9922 /* C_PTR and C_FUNPTR have private components which means they cannot
9923 be printed. However, if -std=gnu and not -pedantic, allow
9924 the component to be printed to help debugging. */
9925 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9927 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9928 "cannot have PRIVATE components", &code
->loc
))
9931 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9933 gfc_error ("Data transfer element at %L cannot have "
9934 "PRIVATE components unless it is processed by "
9935 "a defined input/output procedure", &code
->loc
);
9940 if (exp
->expr_type
== EXPR_STRUCTURE
)
9943 sym
= exp
->symtree
->n
.sym
;
9945 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9946 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9948 gfc_error ("Data transfer element at %L cannot be a full reference to "
9949 "an assumed-size array", &code
->loc
);
9955 /*********** Toplevel code resolution subroutines ***********/
9957 /* Find the set of labels that are reachable from this block. We also
9958 record the last statement in each block. */
9961 find_reachable_labels (gfc_code
*block
)
9968 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9970 /* Collect labels in this block. We don't keep those corresponding
9971 to END {IF|SELECT}, these are checked in resolve_branch by going
9972 up through the code_stack. */
9973 for (c
= block
; c
; c
= c
->next
)
9975 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9976 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9979 /* Merge with labels from parent block. */
9982 gcc_assert (cs_base
->prev
->reachable_labels
);
9983 bitmap_ior_into (cs_base
->reachable_labels
,
9984 cs_base
->prev
->reachable_labels
);
9990 resolve_lock_unlock_event (gfc_code
*code
)
9992 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9993 && code
->expr1
->value
.function
.isym
9994 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9995 remove_caf_get_intrinsic (code
->expr1
);
9997 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9998 && (code
->expr1
->ts
.type
!= BT_DERIVED
9999 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10000 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
10001 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
10002 || code
->expr1
->rank
!= 0
10003 || (!gfc_is_coarray (code
->expr1
) &&
10004 !gfc_is_coindexed (code
->expr1
))))
10005 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
10006 &code
->expr1
->where
);
10007 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
10008 && (code
->expr1
->ts
.type
!= BT_DERIVED
10009 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10010 || code
->expr1
->ts
.u
.derived
->from_intmod
10011 != INTMOD_ISO_FORTRAN_ENV
10012 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
10013 != ISOFORTRAN_EVENT_TYPE
10014 || code
->expr1
->rank
!= 0))
10015 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
10016 &code
->expr1
->where
);
10017 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
10018 && !gfc_is_coindexed (code
->expr1
))
10019 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
10020 &code
->expr1
->where
);
10021 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
10022 gfc_error ("Event variable argument at %L must be a coarray but not "
10023 "coindexed", &code
->expr1
->where
);
10027 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10028 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10029 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10030 &code
->expr2
->where
);
10033 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
10034 _("STAT variable")))
10037 /* Check ERRMSG. */
10039 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10040 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10041 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10042 &code
->expr3
->where
);
10045 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
10046 _("ERRMSG variable")))
10049 /* Check for LOCK the ACQUIRED_LOCK. */
10050 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10051 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
10052 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
10053 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
10054 "variable", &code
->expr4
->where
);
10056 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10057 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
10058 _("ACQUIRED_LOCK variable")))
10061 /* Check for EVENT WAIT the UNTIL_COUNT. */
10062 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
10064 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
10065 || code
->expr4
->rank
!= 0)
10066 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
10067 "expression", &code
->expr4
->where
);
10073 resolve_critical (gfc_code
*code
)
10075 gfc_symtree
*symtree
;
10076 gfc_symbol
*lock_type
;
10077 char name
[GFC_MAX_SYMBOL_LEN
];
10078 static int serial
= 0;
10080 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10083 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10084 GFC_PREFIX ("lock_type"));
10086 lock_type
= symtree
->n
.sym
;
10089 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10091 gcc_unreachable ();
10092 lock_type
= symtree
->n
.sym
;
10093 lock_type
->attr
.flavor
= FL_DERIVED
;
10094 lock_type
->attr
.zero_comp
= 1;
10095 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10096 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10099 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10100 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10101 gcc_unreachable ();
10103 code
->resolved_sym
= symtree
->n
.sym
;
10104 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10105 symtree
->n
.sym
->attr
.referenced
= 1;
10106 symtree
->n
.sym
->attr
.artificial
= 1;
10107 symtree
->n
.sym
->attr
.codimension
= 1;
10108 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10109 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10110 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10111 symtree
->n
.sym
->as
->corank
= 1;
10112 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10113 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10114 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10116 gfc_commit_symbols();
10121 resolve_sync (gfc_code
*code
)
10123 /* Check imageset. The * case matches expr1 == NULL. */
10126 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10127 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10128 "INTEGER expression", &code
->expr1
->where
);
10129 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10130 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10131 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10132 &code
->expr1
->where
);
10133 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10134 && gfc_simplify_expr (code
->expr1
, 0))
10136 gfc_constructor
*cons
;
10137 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10138 for (; cons
; cons
= gfc_constructor_next (cons
))
10139 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10140 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10141 gfc_error ("Imageset argument at %L must between 1 and "
10142 "num_images()", &cons
->expr
->where
);
10147 gfc_resolve_expr (code
->expr2
);
10149 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10150 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10151 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10152 &code
->expr2
->where
);
10154 /* Check ERRMSG. */
10155 gfc_resolve_expr (code
->expr3
);
10157 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10158 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10159 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10160 &code
->expr3
->where
);
10164 /* Given a branch to a label, see if the branch is conforming.
10165 The code node describes where the branch is located. */
10168 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10175 /* Step one: is this a valid branching target? */
10177 if (label
->defined
== ST_LABEL_UNKNOWN
)
10179 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10184 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10186 gfc_error ("Statement at %L is not a valid branch target statement "
10187 "for the branch statement at %L", &label
->where
, &code
->loc
);
10191 /* Step two: make sure this branch is not a branch to itself ;-) */
10193 if (code
->here
== label
)
10196 "Branch at %L may result in an infinite loop", &code
->loc
);
10200 /* Step three: See if the label is in the same block as the
10201 branching statement. The hard work has been done by setting up
10202 the bitmap reachable_labels. */
10204 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10206 /* Check now whether there is a CRITICAL construct; if so, check
10207 whether the label is still visible outside of the CRITICAL block,
10208 which is invalid. */
10209 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10211 if (stack
->current
->op
== EXEC_CRITICAL
10212 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10213 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10214 "label at %L", &code
->loc
, &label
->where
);
10215 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10216 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10217 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10218 "for label at %L", &code
->loc
, &label
->where
);
10224 /* Step four: If we haven't found the label in the bitmap, it may
10225 still be the label of the END of the enclosing block, in which
10226 case we find it by going up the code_stack. */
10228 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10230 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10232 if (stack
->current
->op
== EXEC_CRITICAL
)
10234 /* Note: A label at END CRITICAL does not leave the CRITICAL
10235 construct as END CRITICAL is still part of it. */
10236 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10237 " at %L", &code
->loc
, &label
->where
);
10240 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10242 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10243 "label at %L", &code
->loc
, &label
->where
);
10250 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10254 /* The label is not in an enclosing block, so illegal. This was
10255 allowed in Fortran 66, so we allow it as extension. No
10256 further checks are necessary in this case. */
10257 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10258 "as the GOTO statement at %L", &label
->where
,
10264 /* Check whether EXPR1 has the same shape as EXPR2. */
10267 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10269 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10270 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10271 bool result
= false;
10274 /* Compare the rank. */
10275 if (expr1
->rank
!= expr2
->rank
)
10278 /* Compare the size of each dimension. */
10279 for (i
=0; i
<expr1
->rank
; i
++)
10281 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10284 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10287 if (mpz_cmp (shape
[i
], shape2
[i
]))
10291 /* When either of the two expression is an assumed size array, we
10292 ignore the comparison of dimension sizes. */
10297 gfc_clear_shape (shape
, i
);
10298 gfc_clear_shape (shape2
, i
);
10303 /* Check whether a WHERE assignment target or a WHERE mask expression
10304 has the same shape as the outmost WHERE mask expression. */
10307 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10311 gfc_expr
*e
= NULL
;
10313 cblock
= code
->block
;
10315 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10316 In case of nested WHERE, only the outmost one is stored. */
10317 if (mask
== NULL
) /* outmost WHERE */
10319 else /* inner WHERE */
10326 /* Check if the mask-expr has a consistent shape with the
10327 outmost WHERE mask-expr. */
10328 if (!resolve_where_shape (cblock
->expr1
, e
))
10329 gfc_error ("WHERE mask at %L has inconsistent shape",
10330 &cblock
->expr1
->where
);
10333 /* the assignment statement of a WHERE statement, or the first
10334 statement in where-body-construct of a WHERE construct */
10335 cnext
= cblock
->next
;
10340 /* WHERE assignment statement */
10343 /* Check shape consistent for WHERE assignment target. */
10344 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10345 gfc_error ("WHERE assignment target at %L has "
10346 "inconsistent shape", &cnext
->expr1
->where
);
10350 case EXEC_ASSIGN_CALL
:
10351 resolve_call (cnext
);
10352 if (!cnext
->resolved_sym
->attr
.elemental
)
10353 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10354 &cnext
->ext
.actual
->expr
->where
);
10357 /* WHERE or WHERE construct is part of a where-body-construct */
10359 resolve_where (cnext
, e
);
10363 gfc_error ("Unsupported statement inside WHERE at %L",
10366 /* the next statement within the same where-body-construct */
10367 cnext
= cnext
->next
;
10369 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10370 cblock
= cblock
->block
;
10375 /* Resolve assignment in FORALL construct.
10376 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10377 FORALL index variables. */
10380 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10384 for (n
= 0; n
< nvar
; n
++)
10386 gfc_symbol
*forall_index
;
10388 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10390 /* Check whether the assignment target is one of the FORALL index
10392 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10393 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10394 gfc_error ("Assignment to a FORALL index variable at %L",
10395 &code
->expr1
->where
);
10398 /* If one of the FORALL index variables doesn't appear in the
10399 assignment variable, then there could be a many-to-one
10400 assignment. Emit a warning rather than an error because the
10401 mask could be resolving this problem. */
10402 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10403 gfc_warning (0, "The FORALL with index %qs is not used on the "
10404 "left side of the assignment at %L and so might "
10405 "cause multiple assignment to this object",
10406 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10412 /* Resolve WHERE statement in FORALL construct. */
10415 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10416 gfc_expr
**var_expr
)
10421 cblock
= code
->block
;
10424 /* the assignment statement of a WHERE statement, or the first
10425 statement in where-body-construct of a WHERE construct */
10426 cnext
= cblock
->next
;
10431 /* WHERE assignment statement */
10433 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10436 /* WHERE operator assignment statement */
10437 case EXEC_ASSIGN_CALL
:
10438 resolve_call (cnext
);
10439 if (!cnext
->resolved_sym
->attr
.elemental
)
10440 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10441 &cnext
->ext
.actual
->expr
->where
);
10444 /* WHERE or WHERE construct is part of a where-body-construct */
10446 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10450 gfc_error ("Unsupported statement inside WHERE at %L",
10453 /* the next statement within the same where-body-construct */
10454 cnext
= cnext
->next
;
10456 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10457 cblock
= cblock
->block
;
10462 /* Traverse the FORALL body to check whether the following errors exist:
10463 1. For assignment, check if a many-to-one assignment happens.
10464 2. For WHERE statement, check the WHERE body to see if there is any
10465 many-to-one assignment. */
10468 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10472 c
= code
->block
->next
;
10478 case EXEC_POINTER_ASSIGN
:
10479 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10482 case EXEC_ASSIGN_CALL
:
10486 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10487 there is no need to handle it here. */
10491 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10496 /* The next statement in the FORALL body. */
10502 /* Counts the number of iterators needed inside a forall construct, including
10503 nested forall constructs. This is used to allocate the needed memory
10504 in gfc_resolve_forall. */
10507 gfc_count_forall_iterators (gfc_code
*code
)
10509 int max_iters
, sub_iters
, current_iters
;
10510 gfc_forall_iterator
*fa
;
10512 gcc_assert(code
->op
== EXEC_FORALL
);
10516 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10519 code
= code
->block
->next
;
10523 if (code
->op
== EXEC_FORALL
)
10525 sub_iters
= gfc_count_forall_iterators (code
);
10526 if (sub_iters
> max_iters
)
10527 max_iters
= sub_iters
;
10532 return current_iters
+ max_iters
;
10536 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10537 gfc_resolve_forall_body to resolve the FORALL body. */
10540 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10542 static gfc_expr
**var_expr
;
10543 static int total_var
= 0;
10544 static int nvar
= 0;
10545 int i
, old_nvar
, tmp
;
10546 gfc_forall_iterator
*fa
;
10550 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10553 /* Start to resolve a FORALL construct */
10554 if (forall_save
== 0)
10556 /* Count the total number of FORALL indices in the nested FORALL
10557 construct in order to allocate the VAR_EXPR with proper size. */
10558 total_var
= gfc_count_forall_iterators (code
);
10560 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10561 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10564 /* The information about FORALL iterator, including FORALL indices start, end
10565 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10566 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10568 /* Fortran 20008: C738 (R753). */
10569 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10571 gfc_error ("FORALL index-name at %L must be a scalar variable "
10572 "of type integer", &fa
->var
->where
);
10576 /* Check if any outer FORALL index name is the same as the current
10578 for (i
= 0; i
< nvar
; i
++)
10580 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10581 gfc_error ("An outer FORALL construct already has an index "
10582 "with this name %L", &fa
->var
->where
);
10585 /* Record the current FORALL index. */
10586 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10590 /* No memory leak. */
10591 gcc_assert (nvar
<= total_var
);
10594 /* Resolve the FORALL body. */
10595 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10597 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10598 gfc_resolve_blocks (code
->block
, ns
);
10602 /* Free only the VAR_EXPRs allocated in this frame. */
10603 for (i
= nvar
; i
< tmp
; i
++)
10604 gfc_free_expr (var_expr
[i
]);
10608 /* We are in the outermost FORALL construct. */
10609 gcc_assert (forall_save
== 0);
10611 /* VAR_EXPR is not needed any more. */
10618 /* Resolve a BLOCK construct statement. */
10621 resolve_block_construct (gfc_code
* code
)
10623 /* Resolve the BLOCK's namespace. */
10624 gfc_resolve (code
->ext
.block
.ns
);
10626 /* For an ASSOCIATE block, the associations (and their targets) are already
10627 resolved during resolve_symbol. */
10631 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10635 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10639 for (; b
; b
= b
->block
)
10641 t
= gfc_resolve_expr (b
->expr1
);
10642 if (!gfc_resolve_expr (b
->expr2
))
10648 if (t
&& b
->expr1
!= NULL
10649 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10650 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10656 && b
->expr1
!= NULL
10657 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10658 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10663 resolve_branch (b
->label1
, b
);
10667 resolve_block_construct (b
);
10671 case EXEC_SELECT_TYPE
:
10672 case EXEC_SELECT_RANK
:
10675 case EXEC_DO_WHILE
:
10676 case EXEC_DO_CONCURRENT
:
10677 case EXEC_CRITICAL
:
10680 case EXEC_IOLENGTH
:
10684 case EXEC_OMP_ATOMIC
:
10685 case EXEC_OACC_ATOMIC
:
10687 gfc_omp_atomic_op aop
10688 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10690 /* Verify this before calling gfc_resolve_code, which might
10692 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10693 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10694 && b
->next
->next
== NULL
)
10695 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10696 && b
->next
->next
!= NULL
10697 && b
->next
->next
->op
== EXEC_ASSIGN
10698 && b
->next
->next
->next
== NULL
));
10702 case EXEC_OACC_PARALLEL_LOOP
:
10703 case EXEC_OACC_PARALLEL
:
10704 case EXEC_OACC_KERNELS_LOOP
:
10705 case EXEC_OACC_KERNELS
:
10706 case EXEC_OACC_SERIAL_LOOP
:
10707 case EXEC_OACC_SERIAL
:
10708 case EXEC_OACC_DATA
:
10709 case EXEC_OACC_HOST_DATA
:
10710 case EXEC_OACC_LOOP
:
10711 case EXEC_OACC_UPDATE
:
10712 case EXEC_OACC_WAIT
:
10713 case EXEC_OACC_CACHE
:
10714 case EXEC_OACC_ENTER_DATA
:
10715 case EXEC_OACC_EXIT_DATA
:
10716 case EXEC_OACC_ROUTINE
:
10717 case EXEC_OMP_CRITICAL
:
10718 case EXEC_OMP_DISTRIBUTE
:
10719 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10720 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10721 case EXEC_OMP_DISTRIBUTE_SIMD
:
10723 case EXEC_OMP_DO_SIMD
:
10724 case EXEC_OMP_MASTER
:
10725 case EXEC_OMP_ORDERED
:
10726 case EXEC_OMP_PARALLEL
:
10727 case EXEC_OMP_PARALLEL_DO
:
10728 case EXEC_OMP_PARALLEL_DO_SIMD
:
10729 case EXEC_OMP_PARALLEL_SECTIONS
:
10730 case EXEC_OMP_PARALLEL_WORKSHARE
:
10731 case EXEC_OMP_SECTIONS
:
10732 case EXEC_OMP_SIMD
:
10733 case EXEC_OMP_SINGLE
:
10734 case EXEC_OMP_TARGET
:
10735 case EXEC_OMP_TARGET_DATA
:
10736 case EXEC_OMP_TARGET_ENTER_DATA
:
10737 case EXEC_OMP_TARGET_EXIT_DATA
:
10738 case EXEC_OMP_TARGET_PARALLEL
:
10739 case EXEC_OMP_TARGET_PARALLEL_DO
:
10740 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10741 case EXEC_OMP_TARGET_SIMD
:
10742 case EXEC_OMP_TARGET_TEAMS
:
10743 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10744 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10745 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10746 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10747 case EXEC_OMP_TARGET_UPDATE
:
10748 case EXEC_OMP_TASK
:
10749 case EXEC_OMP_TASKGROUP
:
10750 case EXEC_OMP_TASKLOOP
:
10751 case EXEC_OMP_TASKLOOP_SIMD
:
10752 case EXEC_OMP_TASKWAIT
:
10753 case EXEC_OMP_TASKYIELD
:
10754 case EXEC_OMP_TEAMS
:
10755 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10756 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10757 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10758 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10759 case EXEC_OMP_WORKSHARE
:
10763 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10766 gfc_resolve_code (b
->next
, ns
);
10771 /* Does everything to resolve an ordinary assignment. Returns true
10772 if this is an interface assignment. */
10774 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10781 symbol_attribute attr
;
10783 if (gfc_extend_assign (code
, ns
))
10787 if (code
->op
== EXEC_ASSIGN_CALL
)
10789 lhs
= code
->ext
.actual
->expr
;
10790 rhsptr
= &code
->ext
.actual
->next
->expr
;
10794 gfc_actual_arglist
* args
;
10795 gfc_typebound_proc
* tbp
;
10797 gcc_assert (code
->op
== EXEC_COMPCALL
);
10799 args
= code
->expr1
->value
.compcall
.actual
;
10801 rhsptr
= &args
->next
->expr
;
10803 tbp
= code
->expr1
->value
.compcall
.tbp
;
10804 gcc_assert (!tbp
->is_generic
);
10807 /* Make a temporary rhs when there is a default initializer
10808 and rhs is the same symbol as the lhs. */
10809 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10810 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10811 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10812 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10813 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10821 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10822 && rhs
->ts
.type
== BT_CHARACTER
10823 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10825 /* Use of -fdec-char-conversions allows assignment of character data
10826 to non-character variables. This not permited for nonconstant
10828 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10829 gfc_typename (lhs
), &rhs
->where
);
10833 /* Handle the case of a BOZ literal on the RHS. */
10834 if (rhs
->ts
.type
== BT_BOZ
)
10836 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10837 "statement value nor an actual argument of "
10838 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10842 switch (lhs
->ts
.type
)
10845 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10849 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10853 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10858 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10860 HOST_WIDE_INT llen
= 0, rlen
= 0;
10861 if (lhs
->ts
.u
.cl
!= NULL
10862 && lhs
->ts
.u
.cl
->length
!= NULL
10863 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10864 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10866 if (rhs
->expr_type
== EXPR_CONSTANT
)
10867 rlen
= rhs
->value
.character
.length
;
10869 else if (rhs
->ts
.u
.cl
!= NULL
10870 && rhs
->ts
.u
.cl
->length
!= NULL
10871 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10872 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10874 if (rlen
&& llen
&& rlen
> llen
)
10875 gfc_warning_now (OPT_Wcharacter_truncation
,
10876 "CHARACTER expression will be truncated "
10877 "in assignment (%ld/%ld) at %L",
10878 (long) llen
, (long) rlen
, &code
->loc
);
10881 /* Ensure that a vector index expression for the lvalue is evaluated
10882 to a temporary if the lvalue symbol is referenced in it. */
10885 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10886 if (ref
->type
== REF_ARRAY
)
10888 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10889 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10890 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10891 ref
->u
.ar
.start
[n
]))
10893 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10897 if (gfc_pure (NULL
))
10899 if (lhs
->ts
.type
== BT_DERIVED
10900 && lhs
->expr_type
== EXPR_VARIABLE
10901 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10902 && rhs
->expr_type
== EXPR_VARIABLE
10903 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10904 || gfc_is_coindexed (rhs
)))
10906 /* F2008, C1283. */
10907 if (gfc_is_coindexed (rhs
))
10908 gfc_error ("Coindexed expression at %L is assigned to "
10909 "a derived type variable with a POINTER "
10910 "component in a PURE procedure",
10913 /* F2008, C1283 (4). */
10914 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10915 "shall not be used as the expr at %L of an intrinsic "
10916 "assignment statement in which the variable is of a "
10917 "derived type if the derived type has a pointer "
10918 "component at any level of component selection.",
10923 /* Fortran 2008, C1283. */
10924 if (gfc_is_coindexed (lhs
))
10926 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10927 "procedure", &rhs
->where
);
10932 if (gfc_implicit_pure (NULL
))
10934 if (lhs
->expr_type
== EXPR_VARIABLE
10935 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10936 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10937 gfc_unset_implicit_pure (NULL
);
10939 if (lhs
->ts
.type
== BT_DERIVED
10940 && lhs
->expr_type
== EXPR_VARIABLE
10941 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10942 && rhs
->expr_type
== EXPR_VARIABLE
10943 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10944 || gfc_is_coindexed (rhs
)))
10945 gfc_unset_implicit_pure (NULL
);
10947 /* Fortran 2008, C1283. */
10948 if (gfc_is_coindexed (lhs
))
10949 gfc_unset_implicit_pure (NULL
);
10952 /* F2008, 7.2.1.2. */
10953 attr
= gfc_expr_attr (lhs
);
10954 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10956 if (attr
.codimension
)
10958 gfc_error ("Assignment to polymorphic coarray at %L is not "
10959 "permitted", &lhs
->where
);
10962 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10963 "polymorphic variable at %L", &lhs
->where
))
10965 if (!flag_realloc_lhs
)
10967 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10968 "requires %<-frealloc-lhs%>", &lhs
->where
);
10972 else if (lhs
->ts
.type
== BT_CLASS
)
10974 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10975 "assignment at %L - check that there is a matching specific "
10976 "subroutine for '=' operator", &lhs
->where
);
10980 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10982 /* F2008, Section 7.2.1.2. */
10983 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10985 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10986 "component in assignment at %L", &lhs
->where
);
10990 /* Assign the 'data' of a class object to a derived type. */
10991 if (lhs
->ts
.type
== BT_DERIVED
10992 && rhs
->ts
.type
== BT_CLASS
10993 && rhs
->expr_type
!= EXPR_ARRAY
)
10994 gfc_add_data_component (rhs
);
10996 /* Make sure there is a vtable and, in particular, a _copy for the
10998 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10999 gfc_find_vtab (&rhs
->ts
);
11001 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
11003 || (code
->expr2
->expr_type
== EXPR_FUNCTION
11004 && code
->expr2
->value
.function
.isym
11005 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
11006 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
11007 && !gfc_expr_attr (rhs
).allocatable
11008 && !gfc_has_vector_subscript (rhs
)));
11010 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
11012 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
11013 Additionally, insert this code when the RHS is a CAF as we then use the
11014 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
11015 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
11016 noncoindexed array and the RHS is a coindexed scalar, use the normal code
11018 if (caf_convert_to_send
)
11020 if (code
->expr2
->expr_type
== EXPR_FUNCTION
11021 && code
->expr2
->value
.function
.isym
11022 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11023 remove_caf_get_intrinsic (code
->expr2
);
11024 code
->op
= EXEC_CALL
;
11025 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
11026 code
->resolved_sym
= code
->symtree
->n
.sym
;
11027 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
11028 code
->resolved_sym
->attr
.intrinsic
= 1;
11029 code
->resolved_sym
->attr
.subroutine
= 1;
11030 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
11031 gfc_commit_symbol (code
->resolved_sym
);
11032 code
->ext
.actual
= gfc_get_actual_arglist ();
11033 code
->ext
.actual
->expr
= lhs
;
11034 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
11035 code
->ext
.actual
->next
->expr
= rhs
;
11036 code
->expr1
= NULL
;
11037 code
->expr2
= NULL
;
11044 /* Add a component reference onto an expression. */
11047 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
11052 ref
= &((*ref
)->next
);
11053 *ref
= gfc_get_ref ();
11054 (*ref
)->type
= REF_COMPONENT
;
11055 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
11056 (*ref
)->u
.c
.component
= c
;
11059 /* Add a full array ref, as necessary. */
11062 gfc_add_full_array_ref (e
, c
->as
);
11063 e
->rank
= c
->as
->rank
;
11068 /* Build an assignment. Keep the argument 'op' for future use, so that
11069 pointer assignments can be made. */
11072 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
11073 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11075 gfc_code
*this_code
;
11077 this_code
= gfc_get_code (op
);
11078 this_code
->next
= NULL
;
11079 this_code
->expr1
= gfc_copy_expr (expr1
);
11080 this_code
->expr2
= gfc_copy_expr (expr2
);
11081 this_code
->loc
= loc
;
11082 if (comp1
&& comp2
)
11084 add_comp_ref (this_code
->expr1
, comp1
);
11085 add_comp_ref (this_code
->expr2
, comp2
);
11092 /* Makes a temporary variable expression based on the characteristics of
11093 a given variable expression. */
11096 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11098 static int serial
= 0;
11099 char name
[GFC_MAX_SYMBOL_LEN
];
11101 gfc_array_spec
*as
;
11102 gfc_array_ref
*aref
;
11105 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11106 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11107 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11109 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11110 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11112 e
->value
.character
.length
);
11118 /* Obtain the arrayspec for the temporary. */
11119 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11120 && e
->expr_type
!= EXPR_FUNCTION
11121 && e
->expr_type
!= EXPR_OP
)
11123 aref
= gfc_find_array_ref (e
);
11124 if (e
->expr_type
== EXPR_VARIABLE
11125 && e
->symtree
->n
.sym
->as
== aref
->as
)
11129 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11130 if (ref
->type
== REF_COMPONENT
11131 && ref
->u
.c
.component
->as
== aref
->as
)
11139 /* Add the attributes and the arrayspec to the temporary. */
11140 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11141 tmp
->n
.sym
->attr
.function
= 0;
11142 tmp
->n
.sym
->attr
.result
= 0;
11143 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11144 tmp
->n
.sym
->attr
.dummy
= 0;
11145 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11149 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11152 if (as
->type
== AS_DEFERRED
)
11153 tmp
->n
.sym
->attr
.allocatable
= 1;
11155 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11156 || e
->expr_type
== EXPR_FUNCTION
11157 || e
->expr_type
== EXPR_OP
))
11159 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11160 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11161 tmp
->n
.sym
->as
->rank
= e
->rank
;
11162 tmp
->n
.sym
->attr
.allocatable
= 1;
11163 tmp
->n
.sym
->attr
.dimension
= 1;
11166 tmp
->n
.sym
->attr
.dimension
= 0;
11168 gfc_set_sym_referenced (tmp
->n
.sym
);
11169 gfc_commit_symbol (tmp
->n
.sym
);
11170 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11172 /* Should the lhs be a section, use its array ref for the
11173 temporary expression. */
11174 if (aref
&& aref
->type
!= AR_FULL
)
11176 gfc_free_ref_list (e
->ref
);
11177 e
->ref
= gfc_copy_ref (ref
);
11183 /* Add one line of code to the code chain, making sure that 'head' and
11184 'tail' are appropriately updated. */
11187 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11189 gcc_assert (this_code
);
11191 *head
= *tail
= *this_code
;
11193 *tail
= gfc_append_code (*tail
, *this_code
);
11198 /* Counts the potential number of part array references that would
11199 result from resolution of typebound defined assignments. */
11202 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11205 int c_depth
= 0, t_depth
;
11207 for (c
= derived
->components
; c
; c
= c
->next
)
11209 if ((!gfc_bt_struct (c
->ts
.type
)
11211 || c
->attr
.allocatable
11212 || c
->attr
.proc_pointer_comp
11213 || c
->attr
.class_pointer
11214 || c
->attr
.proc_pointer
)
11215 && !c
->attr
.defined_assign_comp
)
11218 if (c
->as
&& c_depth
== 0)
11221 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11222 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11227 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11229 return depth
+ c_depth
;
11233 /* Implement 7.2.1.3 of the F08 standard:
11234 "An intrinsic assignment where the variable is of derived type is
11235 performed as if each component of the variable were assigned from the
11236 corresponding component of expr using pointer assignment (7.2.2) for
11237 each pointer component, defined assignment for each nonpointer
11238 nonallocatable component of a type that has a type-bound defined
11239 assignment consistent with the component, intrinsic assignment for
11240 each other nonpointer nonallocatable component, ..."
11242 The pointer assignments are taken care of by the intrinsic
11243 assignment of the structure itself. This function recursively adds
11244 defined assignments where required. The recursion is accomplished
11245 by calling gfc_resolve_code.
11247 When the lhs in a defined assignment has intent INOUT, we need a
11248 temporary for the lhs. In pseudo-code:
11250 ! Only call function lhs once.
11251 if (lhs is not a constant or an variable)
11254 ! Do the intrinsic assignment
11256 ! Now do the defined assignments
11257 do over components with typebound defined assignment [%cmp]
11258 #if one component's assignment procedure is INOUT
11260 #if expr2 non-variable
11266 t1%cmp {defined=} expr2%cmp
11272 expr1%cmp {defined=} expr2%cmp
11276 /* The temporary assignments have to be put on top of the additional
11277 code to avoid the result being changed by the intrinsic assignment.
11279 static int component_assignment_level
= 0;
11280 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11283 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11285 gfc_component
*comp1
, *comp2
;
11286 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11288 int error_count
, depth
;
11290 gfc_get_errors (NULL
, &error_count
);
11292 /* Filter out continuing processing after an error. */
11294 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11295 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11298 /* TODO: Handle more than one part array reference in assignments. */
11299 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11300 (*code
)->expr1
->rank
? 1 : 0);
11303 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11304 "done because multiple part array references would "
11305 "occur in intermediate expressions.", &(*code
)->loc
);
11309 component_assignment_level
++;
11311 /* Create a temporary so that functions get called only once. */
11312 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11313 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11315 gfc_expr
*tmp_expr
;
11317 /* Assign the rhs to the temporary. */
11318 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11319 this_code
= build_assignment (EXEC_ASSIGN
,
11320 tmp_expr
, (*code
)->expr2
,
11321 NULL
, NULL
, (*code
)->loc
);
11322 /* Add the code and substitute the rhs expression. */
11323 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11324 gfc_free_expr ((*code
)->expr2
);
11325 (*code
)->expr2
= tmp_expr
;
11328 /* Do the intrinsic assignment. This is not needed if the lhs is one
11329 of the temporaries generated here, since the intrinsic assignment
11330 to the final result already does this. */
11331 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11333 this_code
= build_assignment (EXEC_ASSIGN
,
11334 (*code
)->expr1
, (*code
)->expr2
,
11335 NULL
, NULL
, (*code
)->loc
);
11336 add_code_to_chain (&this_code
, &head
, &tail
);
11339 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11340 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11343 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11345 bool inout
= false;
11347 /* The intrinsic assignment does the right thing for pointers
11348 of all kinds and allocatable components. */
11349 if (!gfc_bt_struct (comp1
->ts
.type
)
11350 || comp1
->attr
.pointer
11351 || comp1
->attr
.allocatable
11352 || comp1
->attr
.proc_pointer_comp
11353 || comp1
->attr
.class_pointer
11354 || comp1
->attr
.proc_pointer
)
11357 /* Make an assigment for this component. */
11358 this_code
= build_assignment (EXEC_ASSIGN
,
11359 (*code
)->expr1
, (*code
)->expr2
,
11360 comp1
, comp2
, (*code
)->loc
);
11362 /* Convert the assignment if there is a defined assignment for
11363 this type. Otherwise, using the call from gfc_resolve_code,
11364 recurse into its components. */
11365 gfc_resolve_code (this_code
, ns
);
11367 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11369 gfc_formal_arglist
*dummy_args
;
11371 /* Check that there is a typebound defined assignment. If not,
11372 then this must be a module defined assignment. We cannot
11373 use the defined_assign_comp attribute here because it must
11374 be this derived type that has the defined assignment and not
11376 if (!(comp1
->ts
.u
.derived
->f2k_derived
11377 && comp1
->ts
.u
.derived
->f2k_derived
11378 ->tb_op
[INTRINSIC_ASSIGN
]))
11380 gfc_free_statements (this_code
);
11385 /* If the first argument of the subroutine has intent INOUT
11386 a temporary must be generated and used instead. */
11387 rsym
= this_code
->resolved_sym
;
11388 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11390 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11392 gfc_code
*temp_code
;
11395 /* Build the temporary required for the assignment and put
11396 it at the head of the generated code. */
11399 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11400 temp_code
= build_assignment (EXEC_ASSIGN
,
11401 t1
, (*code
)->expr1
,
11402 NULL
, NULL
, (*code
)->loc
);
11404 /* For allocatable LHS, check whether it is allocated. Note
11405 that allocatable components with defined assignment are
11406 not yet support. See PR 57696. */
11407 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11411 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11412 block
= gfc_get_code (EXEC_IF
);
11413 block
->block
= gfc_get_code (EXEC_IF
);
11414 block
->block
->expr1
11415 = gfc_build_intrinsic_call (ns
,
11416 GFC_ISYM_ALLOCATED
, "allocated",
11417 (*code
)->loc
, 1, e
);
11418 block
->block
->next
= temp_code
;
11421 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11424 /* Replace the first actual arg with the component of the
11426 gfc_free_expr (this_code
->ext
.actual
->expr
);
11427 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11428 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11430 /* If the LHS variable is allocatable and wasn't allocated and
11431 the temporary is allocatable, pointer assign the address of
11432 the freshly allocated LHS to the temporary. */
11433 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11434 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11439 cond
= gfc_get_expr ();
11440 cond
->ts
.type
= BT_LOGICAL
;
11441 cond
->ts
.kind
= gfc_default_logical_kind
;
11442 cond
->expr_type
= EXPR_OP
;
11443 cond
->where
= (*code
)->loc
;
11444 cond
->value
.op
.op
= INTRINSIC_NOT
;
11445 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11446 GFC_ISYM_ALLOCATED
, "allocated",
11447 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11448 block
= gfc_get_code (EXEC_IF
);
11449 block
->block
= gfc_get_code (EXEC_IF
);
11450 block
->block
->expr1
= cond
;
11451 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11452 t1
, (*code
)->expr1
,
11453 NULL
, NULL
, (*code
)->loc
);
11454 add_code_to_chain (&block
, &head
, &tail
);
11458 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11460 /* Don't add intrinsic assignments since they are already
11461 effected by the intrinsic assignment of the structure. */
11462 gfc_free_statements (this_code
);
11467 add_code_to_chain (&this_code
, &head
, &tail
);
11471 /* Transfer the value to the final result. */
11472 this_code
= build_assignment (EXEC_ASSIGN
,
11473 (*code
)->expr1
, t1
,
11474 comp1
, comp2
, (*code
)->loc
);
11475 add_code_to_chain (&this_code
, &head
, &tail
);
11479 /* Put the temporary assignments at the top of the generated code. */
11480 if (tmp_head
&& component_assignment_level
== 1)
11482 gfc_append_code (tmp_head
, head
);
11484 tmp_head
= tmp_tail
= NULL
;
11487 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11488 // not accidentally deallocated. Hence, nullify t1.
11489 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11490 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11496 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11497 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11498 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11499 block
= gfc_get_code (EXEC_IF
);
11500 block
->block
= gfc_get_code (EXEC_IF
);
11501 block
->block
->expr1
= cond
;
11502 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11503 t1
, gfc_get_null_expr (&(*code
)->loc
),
11504 NULL
, NULL
, (*code
)->loc
);
11505 gfc_append_code (tail
, block
);
11509 /* Now attach the remaining code chain to the input code. Step on
11510 to the end of the new code since resolution is complete. */
11511 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11512 tail
->next
= (*code
)->next
;
11513 /* Overwrite 'code' because this would place the intrinsic assignment
11514 before the temporary for the lhs is created. */
11515 gfc_free_expr ((*code
)->expr1
);
11516 gfc_free_expr ((*code
)->expr2
);
11522 component_assignment_level
--;
11526 /* F2008: Pointer function assignments are of the form:
11527 ptr_fcn (args) = expr
11528 This function breaks these assignments into two statements:
11529 temporary_pointer => ptr_fcn(args)
11530 temporary_pointer = expr */
11533 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11535 gfc_expr
*tmp_ptr_expr
;
11536 gfc_code
*this_code
;
11537 gfc_component
*comp
;
11540 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11543 /* Even if standard does not support this feature, continue to build
11544 the two statements to avoid upsetting frontend_passes.c. */
11545 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11546 "%L", &(*code
)->loc
);
11548 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11551 s
= comp
->ts
.interface
;
11553 s
= (*code
)->expr1
->symtree
->n
.sym
;
11555 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11557 gfc_error ("The function result on the lhs of the assignment at "
11558 "%L must have the pointer attribute.",
11559 &(*code
)->expr1
->where
);
11560 (*code
)->op
= EXEC_NOP
;
11564 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11566 /* get_temp_from_expression is set up for ordinary assignments. To that
11567 end, where array bounds are not known, arrays are made allocatable.
11568 Change the temporary to a pointer here. */
11569 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11570 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11571 tmp_ptr_expr
->where
= (*code
)->loc
;
11573 this_code
= build_assignment (EXEC_ASSIGN
,
11574 tmp_ptr_expr
, (*code
)->expr2
,
11575 NULL
, NULL
, (*code
)->loc
);
11576 this_code
->next
= (*code
)->next
;
11577 (*code
)->next
= this_code
;
11578 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11579 (*code
)->expr2
= (*code
)->expr1
;
11580 (*code
)->expr1
= tmp_ptr_expr
;
11586 /* Deferred character length assignments from an operator expression
11587 require a temporary because the character length of the lhs can
11588 change in the course of the assignment. */
11591 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11593 gfc_expr
*tmp_expr
;
11594 gfc_code
*this_code
;
11596 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11597 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11598 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11601 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11604 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11607 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11608 tmp_expr
->where
= (*code
)->loc
;
11610 /* A new charlen is required to ensure that the variable string
11611 length is different to that of the original lhs. */
11612 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11613 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11614 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11615 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11617 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11619 this_code
= build_assignment (EXEC_ASSIGN
,
11621 gfc_copy_expr (tmp_expr
),
11622 NULL
, NULL
, (*code
)->loc
);
11624 (*code
)->expr1
= tmp_expr
;
11626 this_code
->next
= (*code
)->next
;
11627 (*code
)->next
= this_code
;
11633 /* Given a block of code, recursively resolve everything pointed to by this
11637 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11639 int omp_workshare_save
;
11640 int forall_save
, do_concurrent_save
;
11644 frame
.prev
= cs_base
;
11648 find_reachable_labels (code
);
11650 for (; code
; code
= code
->next
)
11652 frame
.current
= code
;
11653 forall_save
= forall_flag
;
11654 do_concurrent_save
= gfc_do_concurrent_flag
;
11656 if (code
->op
== EXEC_FORALL
)
11659 gfc_resolve_forall (code
, ns
, forall_save
);
11662 else if (code
->block
)
11664 omp_workshare_save
= -1;
11667 case EXEC_OACC_PARALLEL_LOOP
:
11668 case EXEC_OACC_PARALLEL
:
11669 case EXEC_OACC_KERNELS_LOOP
:
11670 case EXEC_OACC_KERNELS
:
11671 case EXEC_OACC_SERIAL_LOOP
:
11672 case EXEC_OACC_SERIAL
:
11673 case EXEC_OACC_DATA
:
11674 case EXEC_OACC_HOST_DATA
:
11675 case EXEC_OACC_LOOP
:
11676 gfc_resolve_oacc_blocks (code
, ns
);
11678 case EXEC_OMP_PARALLEL_WORKSHARE
:
11679 omp_workshare_save
= omp_workshare_flag
;
11680 omp_workshare_flag
= 1;
11681 gfc_resolve_omp_parallel_blocks (code
, ns
);
11683 case EXEC_OMP_PARALLEL
:
11684 case EXEC_OMP_PARALLEL_DO
:
11685 case EXEC_OMP_PARALLEL_DO_SIMD
:
11686 case EXEC_OMP_PARALLEL_SECTIONS
:
11687 case EXEC_OMP_TARGET_PARALLEL
:
11688 case EXEC_OMP_TARGET_PARALLEL_DO
:
11689 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11690 case EXEC_OMP_TARGET_TEAMS
:
11691 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11692 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11693 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11694 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11695 case EXEC_OMP_TASK
:
11696 case EXEC_OMP_TASKLOOP
:
11697 case EXEC_OMP_TASKLOOP_SIMD
:
11698 case EXEC_OMP_TEAMS
:
11699 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11700 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11701 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11702 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11703 omp_workshare_save
= omp_workshare_flag
;
11704 omp_workshare_flag
= 0;
11705 gfc_resolve_omp_parallel_blocks (code
, ns
);
11707 case EXEC_OMP_DISTRIBUTE
:
11708 case EXEC_OMP_DISTRIBUTE_SIMD
:
11710 case EXEC_OMP_DO_SIMD
:
11711 case EXEC_OMP_SIMD
:
11712 case EXEC_OMP_TARGET_SIMD
:
11713 gfc_resolve_omp_do_blocks (code
, ns
);
11715 case EXEC_SELECT_TYPE
:
11716 /* Blocks are handled in resolve_select_type because we have
11717 to transform the SELECT TYPE into ASSOCIATE first. */
11719 case EXEC_DO_CONCURRENT
:
11720 gfc_do_concurrent_flag
= 1;
11721 gfc_resolve_blocks (code
->block
, ns
);
11722 gfc_do_concurrent_flag
= 2;
11724 case EXEC_OMP_WORKSHARE
:
11725 omp_workshare_save
= omp_workshare_flag
;
11726 omp_workshare_flag
= 1;
11729 gfc_resolve_blocks (code
->block
, ns
);
11733 if (omp_workshare_save
!= -1)
11734 omp_workshare_flag
= omp_workshare_save
;
11738 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11739 t
= gfc_resolve_expr (code
->expr1
);
11740 forall_flag
= forall_save
;
11741 gfc_do_concurrent_flag
= do_concurrent_save
;
11743 if (!gfc_resolve_expr (code
->expr2
))
11746 if (code
->op
== EXEC_ALLOCATE
11747 && !gfc_resolve_expr (code
->expr3
))
11753 case EXEC_END_BLOCK
:
11754 case EXEC_END_NESTED_BLOCK
:
11758 case EXEC_ERROR_STOP
:
11760 case EXEC_CONTINUE
:
11762 case EXEC_ASSIGN_CALL
:
11765 case EXEC_CRITICAL
:
11766 resolve_critical (code
);
11769 case EXEC_SYNC_ALL
:
11770 case EXEC_SYNC_IMAGES
:
11771 case EXEC_SYNC_MEMORY
:
11772 resolve_sync (code
);
11777 case EXEC_EVENT_POST
:
11778 case EXEC_EVENT_WAIT
:
11779 resolve_lock_unlock_event (code
);
11782 case EXEC_FAIL_IMAGE
:
11783 case EXEC_FORM_TEAM
:
11784 case EXEC_CHANGE_TEAM
:
11785 case EXEC_END_TEAM
:
11786 case EXEC_SYNC_TEAM
:
11790 /* Keep track of which entry we are up to. */
11791 current_entry_id
= code
->ext
.entry
->id
;
11795 resolve_where (code
, NULL
);
11799 if (code
->expr1
!= NULL
)
11801 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11802 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11803 "INTEGER variable", &code
->expr1
->where
);
11804 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11805 gfc_error ("Variable %qs has not been assigned a target "
11806 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11807 &code
->expr1
->where
);
11810 resolve_branch (code
->label1
, code
);
11814 if (code
->expr1
!= NULL
11815 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11816 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11817 "INTEGER return specifier", &code
->expr1
->where
);
11820 case EXEC_INIT_ASSIGN
:
11821 case EXEC_END_PROCEDURE
:
11828 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11830 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11831 && code
->expr1
->value
.function
.isym
11832 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11833 remove_caf_get_intrinsic (code
->expr1
);
11835 /* If this is a pointer function in an lvalue variable context,
11836 the new code will have to be resolved afresh. This is also the
11837 case with an error, where the code is transformed into NOP to
11838 prevent ICEs downstream. */
11839 if (resolve_ptr_fcn_assign (&code
, ns
)
11840 || code
->op
== EXEC_NOP
)
11843 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11847 if (resolve_ordinary_assign (code
, ns
))
11849 if (code
->op
== EXEC_COMPCALL
)
11855 /* Check for dependencies in deferred character length array
11856 assignments and generate a temporary, if necessary. */
11857 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11860 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11861 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11862 && code
->expr1
->ts
.u
.derived
11863 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11864 generate_component_assignments (&code
, ns
);
11868 case EXEC_LABEL_ASSIGN
:
11869 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11870 gfc_error ("Label %d referenced at %L is never defined",
11871 code
->label1
->value
, &code
->label1
->where
);
11873 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11874 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11875 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11876 != gfc_default_integer_kind
11877 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11878 gfc_error ("ASSIGN statement at %L requires a scalar "
11879 "default INTEGER variable", &code
->expr1
->where
);
11882 case EXEC_POINTER_ASSIGN
:
11889 /* This is both a variable definition and pointer assignment
11890 context, so check both of them. For rank remapping, a final
11891 array ref may be present on the LHS and fool gfc_expr_attr
11892 used in gfc_check_vardef_context. Remove it. */
11893 e
= remove_last_array_ref (code
->expr1
);
11894 t
= gfc_check_vardef_context (e
, true, false, false,
11895 _("pointer assignment"));
11897 t
= gfc_check_vardef_context (e
, false, false, false,
11898 _("pointer assignment"));
11901 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11906 /* Assigning a class object always is a regular assign. */
11907 if (code
->expr2
->ts
.type
== BT_CLASS
11908 && code
->expr1
->ts
.type
== BT_CLASS
11909 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11910 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11911 && code
->expr2
->expr_type
== EXPR_VARIABLE
11912 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11914 code
->op
= EXEC_ASSIGN
;
11918 case EXEC_ARITHMETIC_IF
:
11920 gfc_expr
*e
= code
->expr1
;
11922 gfc_resolve_expr (e
);
11923 if (e
->expr_type
== EXPR_NULL
)
11924 gfc_error ("Invalid NULL at %L", &e
->where
);
11926 if (t
&& (e
->rank
> 0
11927 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11928 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11929 "REAL or INTEGER expression", &e
->where
);
11931 resolve_branch (code
->label1
, code
);
11932 resolve_branch (code
->label2
, code
);
11933 resolve_branch (code
->label3
, code
);
11938 if (t
&& code
->expr1
!= NULL
11939 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11940 || code
->expr1
->rank
!= 0))
11941 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11942 &code
->expr1
->where
);
11947 resolve_call (code
);
11950 case EXEC_COMPCALL
:
11952 resolve_typebound_subroutine (code
);
11955 case EXEC_CALL_PPC
:
11956 resolve_ppc_call (code
);
11960 /* Select is complicated. Also, a SELECT construct could be
11961 a transformed computed GOTO. */
11962 resolve_select (code
, false);
11965 case EXEC_SELECT_TYPE
:
11966 resolve_select_type (code
, ns
);
11969 case EXEC_SELECT_RANK
:
11970 resolve_select_rank (code
, ns
);
11974 resolve_block_construct (code
);
11978 if (code
->ext
.iterator
!= NULL
)
11980 gfc_iterator
*iter
= code
->ext
.iterator
;
11981 if (gfc_resolve_iterator (iter
, true, false))
11982 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11987 case EXEC_DO_WHILE
:
11988 if (code
->expr1
== NULL
)
11989 gfc_internal_error ("gfc_resolve_code(): No expression on "
11992 && (code
->expr1
->rank
!= 0
11993 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11994 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11995 "a scalar LOGICAL expression", &code
->expr1
->where
);
11998 case EXEC_ALLOCATE
:
12000 resolve_allocate_deallocate (code
, "ALLOCATE");
12004 case EXEC_DEALLOCATE
:
12006 resolve_allocate_deallocate (code
, "DEALLOCATE");
12011 if (!gfc_resolve_open (code
->ext
.open
, &code
->loc
))
12014 resolve_branch (code
->ext
.open
->err
, code
);
12018 if (!gfc_resolve_close (code
->ext
.close
, &code
->loc
))
12021 resolve_branch (code
->ext
.close
->err
, code
);
12024 case EXEC_BACKSPACE
:
12028 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
12031 resolve_branch (code
->ext
.filepos
->err
, code
);
12035 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12038 resolve_branch (code
->ext
.inquire
->err
, code
);
12041 case EXEC_IOLENGTH
:
12042 gcc_assert (code
->ext
.inquire
!= NULL
);
12043 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12046 resolve_branch (code
->ext
.inquire
->err
, code
);
12050 if (!gfc_resolve_wait (code
->ext
.wait
))
12053 resolve_branch (code
->ext
.wait
->err
, code
);
12054 resolve_branch (code
->ext
.wait
->end
, code
);
12055 resolve_branch (code
->ext
.wait
->eor
, code
);
12060 if (!gfc_resolve_dt (code
, code
->ext
.dt
, &code
->loc
))
12063 resolve_branch (code
->ext
.dt
->err
, code
);
12064 resolve_branch (code
->ext
.dt
->end
, code
);
12065 resolve_branch (code
->ext
.dt
->eor
, code
);
12068 case EXEC_TRANSFER
:
12069 resolve_transfer (code
);
12072 case EXEC_DO_CONCURRENT
:
12074 resolve_forall_iterators (code
->ext
.forall_iterator
);
12076 if (code
->expr1
!= NULL
12077 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12078 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12079 "expression", &code
->expr1
->where
);
12082 case EXEC_OACC_PARALLEL_LOOP
:
12083 case EXEC_OACC_PARALLEL
:
12084 case EXEC_OACC_KERNELS_LOOP
:
12085 case EXEC_OACC_KERNELS
:
12086 case EXEC_OACC_SERIAL_LOOP
:
12087 case EXEC_OACC_SERIAL
:
12088 case EXEC_OACC_DATA
:
12089 case EXEC_OACC_HOST_DATA
:
12090 case EXEC_OACC_LOOP
:
12091 case EXEC_OACC_UPDATE
:
12092 case EXEC_OACC_WAIT
:
12093 case EXEC_OACC_CACHE
:
12094 case EXEC_OACC_ENTER_DATA
:
12095 case EXEC_OACC_EXIT_DATA
:
12096 case EXEC_OACC_ATOMIC
:
12097 case EXEC_OACC_DECLARE
:
12098 gfc_resolve_oacc_directive (code
, ns
);
12101 case EXEC_OMP_ATOMIC
:
12102 case EXEC_OMP_BARRIER
:
12103 case EXEC_OMP_CANCEL
:
12104 case EXEC_OMP_CANCELLATION_POINT
:
12105 case EXEC_OMP_CRITICAL
:
12106 case EXEC_OMP_FLUSH
:
12107 case EXEC_OMP_DISTRIBUTE
:
12108 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12109 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12110 case EXEC_OMP_DISTRIBUTE_SIMD
:
12112 case EXEC_OMP_DO_SIMD
:
12113 case EXEC_OMP_MASTER
:
12114 case EXEC_OMP_ORDERED
:
12115 case EXEC_OMP_SECTIONS
:
12116 case EXEC_OMP_SIMD
:
12117 case EXEC_OMP_SINGLE
:
12118 case EXEC_OMP_TARGET
:
12119 case EXEC_OMP_TARGET_DATA
:
12120 case EXEC_OMP_TARGET_ENTER_DATA
:
12121 case EXEC_OMP_TARGET_EXIT_DATA
:
12122 case EXEC_OMP_TARGET_PARALLEL
:
12123 case EXEC_OMP_TARGET_PARALLEL_DO
:
12124 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12125 case EXEC_OMP_TARGET_SIMD
:
12126 case EXEC_OMP_TARGET_TEAMS
:
12127 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12128 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12129 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12130 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12131 case EXEC_OMP_TARGET_UPDATE
:
12132 case EXEC_OMP_TASK
:
12133 case EXEC_OMP_TASKGROUP
:
12134 case EXEC_OMP_TASKLOOP
:
12135 case EXEC_OMP_TASKLOOP_SIMD
:
12136 case EXEC_OMP_TASKWAIT
:
12137 case EXEC_OMP_TASKYIELD
:
12138 case EXEC_OMP_TEAMS
:
12139 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12140 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12141 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12142 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12143 case EXEC_OMP_WORKSHARE
:
12144 gfc_resolve_omp_directive (code
, ns
);
12147 case EXEC_OMP_PARALLEL
:
12148 case EXEC_OMP_PARALLEL_DO
:
12149 case EXEC_OMP_PARALLEL_DO_SIMD
:
12150 case EXEC_OMP_PARALLEL_SECTIONS
:
12151 case EXEC_OMP_PARALLEL_WORKSHARE
:
12152 omp_workshare_save
= omp_workshare_flag
;
12153 omp_workshare_flag
= 0;
12154 gfc_resolve_omp_directive (code
, ns
);
12155 omp_workshare_flag
= omp_workshare_save
;
12159 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12163 cs_base
= frame
.prev
;
12167 /* Resolve initial values and make sure they are compatible with
12171 resolve_values (gfc_symbol
*sym
)
12175 if (sym
->value
== NULL
)
12178 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12179 t
= resolve_structure_cons (sym
->value
, 1);
12181 t
= gfc_resolve_expr (sym
->value
);
12186 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12190 /* Verify any BIND(C) derived types in the namespace so we can report errors
12191 for them once, rather than for each variable declared of that type. */
12194 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12196 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12197 && derived_sym
->attr
.is_bind_c
== 1)
12198 verify_bind_c_derived_type (derived_sym
);
12204 /* Check the interfaces of DTIO procedures associated with derived
12205 type 'sym'. These procedures can either have typebound bindings or
12206 can appear in DTIO generic interfaces. */
12209 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12211 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12214 gfc_check_dtio_interfaces (sym
);
12219 /* Verify that any binding labels used in a given namespace do not collide
12220 with the names or binding labels of any global symbols. Multiple INTERFACE
12221 for the same procedure are permitted. */
12224 gfc_verify_binding_labels (gfc_symbol
*sym
)
12227 const char *module
;
12229 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12230 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12233 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12236 module
= sym
->module
;
12237 else if (sym
->ns
&& sym
->ns
->proc_name
12238 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12239 module
= sym
->ns
->proc_name
->name
;
12240 else if (sym
->ns
&& sym
->ns
->parent
12241 && sym
->ns
&& sym
->ns
->parent
->proc_name
12242 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12243 module
= sym
->ns
->parent
->proc_name
->name
;
12249 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12252 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12253 gsym
->where
= sym
->declared_at
;
12254 gsym
->sym_name
= sym
->name
;
12255 gsym
->binding_label
= sym
->binding_label
;
12256 gsym
->ns
= sym
->ns
;
12257 gsym
->mod_name
= module
;
12258 if (sym
->attr
.function
)
12259 gsym
->type
= GSYM_FUNCTION
;
12260 else if (sym
->attr
.subroutine
)
12261 gsym
->type
= GSYM_SUBROUTINE
;
12262 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12263 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12267 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12269 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12270 "identifier as entity at %L", sym
->name
,
12271 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12272 /* Clear the binding label to prevent checking multiple times. */
12273 sym
->binding_label
= NULL
;
12277 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12278 && (strcmp (module
, gsym
->mod_name
) != 0
12279 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12281 /* This can only happen if the variable is defined in a module - if it
12282 isn't the same module, reject it. */
12283 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12284 "uses the same global identifier as entity at %L from module %qs",
12285 sym
->name
, module
, sym
->binding_label
,
12286 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12287 sym
->binding_label
= NULL
;
12291 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12292 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12293 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12294 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12295 && (module
!= gsym
->mod_name
12296 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12297 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12299 /* Print an error if the procedure is defined multiple times; we have to
12300 exclude references to the same procedure via module association or
12301 multiple checks for the same procedure. */
12302 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12303 "global identifier as entity at %L", sym
->name
,
12304 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12305 sym
->binding_label
= NULL
;
12310 /* Resolve an index expression. */
12313 resolve_index_expr (gfc_expr
*e
)
12315 if (!gfc_resolve_expr (e
))
12318 if (!gfc_simplify_expr (e
, 0))
12321 if (!gfc_specification_expr (e
))
12328 /* Resolve a charlen structure. */
12331 resolve_charlen (gfc_charlen
*cl
)
12334 bool saved_specification_expr
;
12340 saved_specification_expr
= specification_expr
;
12341 specification_expr
= true;
12343 if (cl
->length_from_typespec
)
12345 if (!gfc_resolve_expr (cl
->length
))
12347 specification_expr
= saved_specification_expr
;
12351 if (!gfc_simplify_expr (cl
->length
, 0))
12353 specification_expr
= saved_specification_expr
;
12357 /* cl->length has been resolved. It should have an integer type. */
12358 if (cl
->length
->ts
.type
!= BT_INTEGER
|| cl
->length
->rank
!= 0)
12360 gfc_error ("Scalar INTEGER expression expected at %L",
12361 &cl
->length
->where
);
12367 if (!resolve_index_expr (cl
->length
))
12369 specification_expr
= saved_specification_expr
;
12374 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12375 a negative value, the length of character entities declared is zero. */
12376 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12377 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12378 gfc_replace_expr (cl
->length
,
12379 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12381 /* Check that the character length is not too large. */
12382 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12383 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12384 && cl
->length
->ts
.type
== BT_INTEGER
12385 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12387 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12388 specification_expr
= saved_specification_expr
;
12392 specification_expr
= saved_specification_expr
;
12397 /* Test for non-constant shape arrays. */
12400 is_non_constant_shape_array (gfc_symbol
*sym
)
12406 not_constant
= false;
12407 if (sym
->as
!= NULL
)
12409 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12410 has not been simplified; parameter array references. Do the
12411 simplification now. */
12412 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12414 if (i
== GFC_MAX_DIMENSIONS
)
12417 e
= sym
->as
->lower
[i
];
12418 if (e
&& (!resolve_index_expr(e
)
12419 || !gfc_is_constant_expr (e
)))
12420 not_constant
= true;
12421 e
= sym
->as
->upper
[i
];
12422 if (e
&& (!resolve_index_expr(e
)
12423 || !gfc_is_constant_expr (e
)))
12424 not_constant
= true;
12427 return not_constant
;
12430 /* Given a symbol and an initialization expression, add code to initialize
12431 the symbol to the function entry. */
12433 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12437 gfc_namespace
*ns
= sym
->ns
;
12439 /* Search for the function namespace if this is a contained
12440 function without an explicit result. */
12441 if (sym
->attr
.function
&& sym
== sym
->result
12442 && sym
->name
!= sym
->ns
->proc_name
->name
)
12444 ns
= ns
->contained
;
12445 for (;ns
; ns
= ns
->sibling
)
12446 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12452 gfc_free_expr (init
);
12456 /* Build an l-value expression for the result. */
12457 lval
= gfc_lval_expr_from_sym (sym
);
12459 /* Add the code at scope entry. */
12460 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12461 init_st
->next
= ns
->code
;
12462 ns
->code
= init_st
;
12464 /* Assign the default initializer to the l-value. */
12465 init_st
->loc
= sym
->declared_at
;
12466 init_st
->expr1
= lval
;
12467 init_st
->expr2
= init
;
12471 /* Whether or not we can generate a default initializer for a symbol. */
12474 can_generate_init (gfc_symbol
*sym
)
12476 symbol_attribute
*a
;
12481 /* These symbols should never have a default initialization. */
12486 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12487 && (CLASS_DATA (sym
)->attr
.class_pointer
12488 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12489 || a
->in_equivalence
12496 || (!a
->referenced
&& !a
->result
)
12497 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12498 || (a
->function
&& sym
!= sym
->result
)
12503 /* Assign the default initializer to a derived type variable or result. */
12506 apply_default_init (gfc_symbol
*sym
)
12508 gfc_expr
*init
= NULL
;
12510 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12513 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12514 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12516 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12519 build_init_assign (sym
, init
);
12520 sym
->attr
.referenced
= 1;
12524 /* Build an initializer for a local. Returns null if the symbol should not have
12525 a default initialization. */
12528 build_default_init_expr (gfc_symbol
*sym
)
12530 /* These symbols should never have a default initialization. */
12531 if (sym
->attr
.allocatable
12532 || sym
->attr
.external
12534 || sym
->attr
.pointer
12535 || sym
->attr
.in_equivalence
12536 || sym
->attr
.in_common
12539 || sym
->attr
.cray_pointee
12540 || sym
->attr
.cray_pointer
12544 /* Get the appropriate init expression. */
12545 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12548 /* Add an initialization expression to a local variable. */
12550 apply_default_init_local (gfc_symbol
*sym
)
12552 gfc_expr
*init
= NULL
;
12554 /* The symbol should be a variable or a function return value. */
12555 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12556 || (sym
->attr
.function
&& sym
->result
!= sym
))
12559 /* Try to build the initializer expression. If we can't initialize
12560 this symbol, then init will be NULL. */
12561 init
= build_default_init_expr (sym
);
12565 /* For saved variables, we don't want to add an initializer at function
12566 entry, so we just add a static initializer. Note that automatic variables
12567 are stack allocated even with -fno-automatic; we have also to exclude
12568 result variable, which are also nonstatic. */
12569 if (!sym
->attr
.automatic
12570 && (sym
->attr
.save
|| sym
->ns
->save_all
12571 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12572 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12573 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12575 /* Don't clobber an existing initializer! */
12576 gcc_assert (sym
->value
== NULL
);
12581 build_init_assign (sym
, init
);
12585 /* Resolution of common features of flavors variable and procedure. */
12588 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12590 gfc_array_spec
*as
;
12592 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12593 as
= CLASS_DATA (sym
)->as
;
12597 /* Constraints on deferred shape variable. */
12598 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12600 bool pointer
, allocatable
, dimension
;
12602 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12604 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12605 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12606 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12610 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12611 allocatable
= sym
->attr
.allocatable
;
12612 dimension
= sym
->attr
.dimension
;
12617 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12619 gfc_error ("Allocatable array %qs at %L must have a deferred "
12620 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12623 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12624 "%qs at %L may not be ALLOCATABLE",
12625 sym
->name
, &sym
->declared_at
))
12629 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12631 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12632 "assumed rank", sym
->name
, &sym
->declared_at
);
12639 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12640 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12642 gfc_error ("Array %qs at %L cannot have a deferred shape",
12643 sym
->name
, &sym
->declared_at
);
12648 /* Constraints on polymorphic variables. */
12649 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12652 if (sym
->attr
.class_ok
12653 && !sym
->attr
.select_type_temporary
12654 && !UNLIMITED_POLY (sym
)
12655 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12657 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12658 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12659 &sym
->declared_at
);
12664 /* Assume that use associated symbols were checked in the module ns.
12665 Class-variables that are associate-names are also something special
12666 and excepted from the test. */
12667 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12669 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12670 "or pointer", sym
->name
, &sym
->declared_at
);
12679 /* Additional checks for symbols with flavor variable and derived
12680 type. To be called from resolve_fl_variable. */
12683 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12685 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12687 /* Check to see if a derived type is blocked from being host
12688 associated by the presence of another class I symbol in the same
12689 namespace. 14.6.1.3 of the standard and the discussion on
12690 comp.lang.fortran. */
12691 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12692 && !sym
->ts
.u
.derived
->attr
.use_assoc
12693 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12696 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12697 if (s
&& s
->attr
.generic
)
12698 s
= gfc_find_dt_in_generic (s
);
12699 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12701 gfc_error ("The type %qs cannot be host associated at %L "
12702 "because it is blocked by an incompatible object "
12703 "of the same name declared at %L",
12704 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12710 /* 4th constraint in section 11.3: "If an object of a type for which
12711 component-initialization is specified (R429) appears in the
12712 specification-part of a module and does not have the ALLOCATABLE
12713 or POINTER attribute, the object shall have the SAVE attribute."
12715 The check for initializers is performed with
12716 gfc_has_default_initializer because gfc_default_initializer generates
12717 a hidden default for allocatable components. */
12718 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12719 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12720 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12721 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12722 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12723 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12724 "%qs at %L, needed due to the default "
12725 "initialization", sym
->name
, &sym
->declared_at
))
12728 /* Assign default initializer. */
12729 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12730 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12731 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12737 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12738 except in the declaration of an entity or component that has the POINTER
12739 or ALLOCATABLE attribute. */
12742 deferred_requirements (gfc_symbol
*sym
)
12744 if (sym
->ts
.deferred
12745 && !(sym
->attr
.pointer
12746 || sym
->attr
.allocatable
12747 || sym
->attr
.associate_var
12748 || sym
->attr
.omp_udr_artificial_var
))
12750 /* If a function has a result variable, only check the variable. */
12751 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12754 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12755 "requires either the POINTER or ALLOCATABLE attribute",
12756 sym
->name
, &sym
->declared_at
);
12763 /* Resolve symbols with flavor variable. */
12766 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12768 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12771 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12774 /* Set this flag to check that variables are parameters of all entries.
12775 This check is effected by the call to gfc_resolve_expr through
12776 is_non_constant_shape_array. */
12777 bool saved_specification_expr
= specification_expr
;
12778 specification_expr
= true;
12780 if (sym
->ns
->proc_name
12781 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12782 || sym
->ns
->proc_name
->attr
.is_main_program
)
12783 && !sym
->attr
.use_assoc
12784 && !sym
->attr
.allocatable
12785 && !sym
->attr
.pointer
12786 && is_non_constant_shape_array (sym
))
12788 /* F08:C541. The shape of an array defined in a main program or module
12789 * needs to be constant. */
12790 gfc_error ("The module or main program array %qs at %L must "
12791 "have constant shape", sym
->name
, &sym
->declared_at
);
12792 specification_expr
= saved_specification_expr
;
12796 /* Constraints on deferred type parameter. */
12797 if (!deferred_requirements (sym
))
12800 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12802 /* Make sure that character string variables with assumed length are
12803 dummy arguments. */
12804 gfc_expr
*e
= NULL
;
12807 e
= sym
->ts
.u
.cl
->length
;
12811 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12812 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12813 && !sym
->attr
.omp_udr_artificial_var
)
12815 gfc_error ("Entity with assumed character length at %L must be a "
12816 "dummy argument or a PARAMETER", &sym
->declared_at
);
12817 specification_expr
= saved_specification_expr
;
12821 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12823 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12824 specification_expr
= saved_specification_expr
;
12828 if (!gfc_is_constant_expr (e
)
12829 && !(e
->expr_type
== EXPR_VARIABLE
12830 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12832 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12833 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12834 || sym
->ns
->proc_name
->attr
.is_main_program
))
12836 gfc_error ("%qs at %L must have constant character length "
12837 "in this context", sym
->name
, &sym
->declared_at
);
12838 specification_expr
= saved_specification_expr
;
12841 if (sym
->attr
.in_common
)
12843 gfc_error ("COMMON variable %qs at %L must have constant "
12844 "character length", sym
->name
, &sym
->declared_at
);
12845 specification_expr
= saved_specification_expr
;
12851 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12852 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12854 /* Determine if the symbol may not have an initializer. */
12855 int no_init_flag
= 0, automatic_flag
= 0;
12856 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12857 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12859 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12860 && is_non_constant_shape_array (sym
))
12862 no_init_flag
= automatic_flag
= 1;
12864 /* Also, they must not have the SAVE attribute.
12865 SAVE_IMPLICIT is checked below. */
12866 if (sym
->as
&& sym
->attr
.codimension
)
12868 int corank
= sym
->as
->corank
;
12869 sym
->as
->corank
= 0;
12870 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12871 sym
->as
->corank
= corank
;
12873 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12875 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12876 specification_expr
= saved_specification_expr
;
12881 /* Ensure that any initializer is simplified. */
12883 gfc_simplify_expr (sym
->value
, 1);
12885 /* Reject illegal initializers. */
12886 if (!sym
->mark
&& sym
->value
)
12888 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12889 && CLASS_DATA (sym
)->attr
.allocatable
))
12890 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12891 sym
->name
, &sym
->declared_at
);
12892 else if (sym
->attr
.external
)
12893 gfc_error ("External %qs at %L cannot have an initializer",
12894 sym
->name
, &sym
->declared_at
);
12895 else if (sym
->attr
.dummy
12896 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12897 gfc_error ("Dummy %qs at %L cannot have an initializer",
12898 sym
->name
, &sym
->declared_at
);
12899 else if (sym
->attr
.intrinsic
)
12900 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12901 sym
->name
, &sym
->declared_at
);
12902 else if (sym
->attr
.result
)
12903 gfc_error ("Function result %qs at %L cannot have an initializer",
12904 sym
->name
, &sym
->declared_at
);
12905 else if (automatic_flag
)
12906 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12907 sym
->name
, &sym
->declared_at
);
12909 goto no_init_error
;
12910 specification_expr
= saved_specification_expr
;
12915 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12917 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12918 specification_expr
= saved_specification_expr
;
12922 specification_expr
= saved_specification_expr
;
12927 /* Compare the dummy characteristics of a module procedure interface
12928 declaration with the corresponding declaration in a submodule. */
12929 static gfc_formal_arglist
*new_formal
;
12930 static char errmsg
[200];
12933 compare_fsyms (gfc_symbol
*sym
)
12937 if (sym
== NULL
|| new_formal
== NULL
)
12940 fsym
= new_formal
->sym
;
12945 if (strcmp (sym
->name
, fsym
->name
) == 0)
12947 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12948 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12953 /* Resolve a procedure. */
12956 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12958 gfc_formal_arglist
*arg
;
12960 if (sym
->attr
.function
12961 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12964 /* Constraints on deferred type parameter. */
12965 if (!deferred_requirements (sym
))
12968 if (sym
->ts
.type
== BT_CHARACTER
)
12970 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12972 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12973 && !resolve_charlen (cl
))
12976 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12977 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12979 gfc_error ("Character-valued statement function %qs at %L must "
12980 "have constant length", sym
->name
, &sym
->declared_at
);
12985 /* Ensure that derived type for are not of a private type. Internal
12986 module procedures are excluded by 2.2.3.3 - i.e., they are not
12987 externally accessible and can access all the objects accessible in
12989 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12990 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12991 && gfc_check_symbol_access (sym
))
12993 gfc_interface
*iface
;
12995 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12998 && arg
->sym
->ts
.type
== BT_DERIVED
12999 && arg
->sym
->ts
.u
.derived
13000 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13001 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13002 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
13003 "and cannot be a dummy argument"
13004 " of %qs, which is PUBLIC at %L",
13005 arg
->sym
->name
, sym
->name
,
13006 &sym
->declared_at
))
13008 /* Stop this message from recurring. */
13009 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13014 /* PUBLIC interfaces may expose PRIVATE procedures that take types
13015 PRIVATE to the containing module. */
13016 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
13018 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
13021 && arg
->sym
->ts
.type
== BT_DERIVED
13022 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13023 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13024 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
13025 "PUBLIC interface %qs at %L "
13026 "takes dummy arguments of %qs which "
13027 "is PRIVATE", iface
->sym
->name
,
13028 sym
->name
, &iface
->sym
->declared_at
,
13029 gfc_typename(&arg
->sym
->ts
)))
13031 /* Stop this message from recurring. */
13032 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13039 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
13040 && !sym
->attr
.proc_pointer
)
13042 gfc_error ("Function %qs at %L cannot have an initializer",
13043 sym
->name
, &sym
->declared_at
);
13045 /* Make sure no second error is issued for this. */
13046 sym
->value
->error
= 1;
13050 /* An external symbol may not have an initializer because it is taken to be
13051 a procedure. Exception: Procedure Pointers. */
13052 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
13054 gfc_error ("External object %qs at %L may not have an initializer",
13055 sym
->name
, &sym
->declared_at
);
13059 /* An elemental function is required to return a scalar 12.7.1 */
13060 if (sym
->attr
.elemental
&& sym
->attr
.function
13061 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
13063 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
13064 "result", sym
->name
, &sym
->declared_at
);
13065 /* Reset so that the error only occurs once. */
13066 sym
->attr
.elemental
= 0;
13070 if (sym
->attr
.proc
== PROC_ST_FUNCTION
13071 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
13073 gfc_error ("Statement function %qs at %L may not have pointer or "
13074 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13078 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13079 char-len-param shall not be array-valued, pointer-valued, recursive
13080 or pure. ....snip... A character value of * may only be used in the
13081 following ways: (i) Dummy arg of procedure - dummy associates with
13082 actual length; (ii) To declare a named constant; or (iii) External
13083 function - but length must be declared in calling scoping unit. */
13084 if (sym
->attr
.function
13085 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13086 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13088 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13089 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13091 if (sym
->as
&& sym
->as
->rank
)
13092 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13093 "array-valued", sym
->name
, &sym
->declared_at
);
13095 if (sym
->attr
.pointer
)
13096 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13097 "pointer-valued", sym
->name
, &sym
->declared_at
);
13099 if (sym
->attr
.pure
)
13100 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13101 "pure", sym
->name
, &sym
->declared_at
);
13103 if (sym
->attr
.recursive
)
13104 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13105 "recursive", sym
->name
, &sym
->declared_at
);
13110 /* Appendix B.2 of the standard. Contained functions give an
13111 error anyway. Deferred character length is an F2003 feature.
13112 Don't warn on intrinsic conversion functions, which start
13113 with two underscores. */
13114 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13115 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13116 gfc_notify_std (GFC_STD_F95_OBS
,
13117 "CHARACTER(*) function %qs at %L",
13118 sym
->name
, &sym
->declared_at
);
13121 /* F2008, C1218. */
13122 if (sym
->attr
.elemental
)
13124 if (sym
->attr
.proc_pointer
)
13126 const char* name
= (sym
->attr
.result
? sym
->ns
->proc_name
->name
13128 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13129 name
, &sym
->declared_at
);
13132 if (sym
->attr
.dummy
)
13134 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13135 sym
->name
, &sym
->declared_at
);
13140 /* F2018, C15100: "The result of an elemental function shall be scalar,
13141 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13142 pointer is tested and caught elsewhere. */
13143 if (sym
->attr
.elemental
&& sym
->result
13144 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13146 gfc_error ("Function result variable %qs at %L of elemental "
13147 "function %qs shall not have an ALLOCATABLE or POINTER "
13148 "attribute", sym
->result
->name
,
13149 &sym
->result
->declared_at
, sym
->name
);
13153 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13155 gfc_formal_arglist
*curr_arg
;
13156 int has_non_interop_arg
= 0;
13158 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13159 sym
->common_block
))
13161 /* Clear these to prevent looking at them again if there was an
13163 sym
->attr
.is_bind_c
= 0;
13164 sym
->attr
.is_c_interop
= 0;
13165 sym
->ts
.is_c_interop
= 0;
13169 /* So far, no errors have been found. */
13170 sym
->attr
.is_c_interop
= 1;
13171 sym
->ts
.is_c_interop
= 1;
13174 curr_arg
= gfc_sym_get_dummy_args (sym
);
13175 while (curr_arg
!= NULL
)
13177 /* Skip implicitly typed dummy args here. */
13178 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13179 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13180 /* If something is found to fail, record the fact so we
13181 can mark the symbol for the procedure as not being
13182 BIND(C) to try and prevent multiple errors being
13184 has_non_interop_arg
= 1;
13186 curr_arg
= curr_arg
->next
;
13189 /* See if any of the arguments were not interoperable and if so, clear
13190 the procedure symbol to prevent duplicate error messages. */
13191 if (has_non_interop_arg
!= 0)
13193 sym
->attr
.is_c_interop
= 0;
13194 sym
->ts
.is_c_interop
= 0;
13195 sym
->attr
.is_bind_c
= 0;
13199 if (!sym
->attr
.proc_pointer
)
13201 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13203 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13204 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13207 if (sym
->attr
.intent
)
13209 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13210 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13213 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13215 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13216 "in %qs at %L", sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13219 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13220 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13221 || sym
->attr
.contained
))
13223 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13224 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13227 if (strcmp ("ppr@", sym
->name
) == 0)
13229 gfc_error ("Procedure pointer result %qs at %L "
13230 "is missing the pointer attribute",
13231 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13236 /* Assume that a procedure whose body is not known has references
13237 to external arrays. */
13238 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13239 sym
->attr
.array_outer_dependency
= 1;
13241 /* Compare the characteristics of a module procedure with the
13242 interface declaration. Ideally this would be done with
13243 gfc_compare_interfaces but, at present, the formal interface
13244 cannot be copied to the ts.interface. */
13245 if (sym
->attr
.module_procedure
13246 && sym
->attr
.if_source
== IFSRC_DECL
)
13249 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13251 char *submodule_name
;
13252 strcpy (name
, sym
->ns
->proc_name
->name
);
13253 module_name
= strtok (name
, ".");
13254 submodule_name
= strtok (NULL
, ".");
13256 iface
= sym
->tlink
;
13259 /* Make sure that the result uses the correct charlen for deferred
13261 if (iface
&& sym
->result
13262 && iface
->ts
.type
== BT_CHARACTER
13263 && iface
->ts
.deferred
)
13264 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13269 /* Check the procedure characteristics. */
13270 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13272 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13273 "PROCEDURE at %L and its interface in %s",
13274 &sym
->declared_at
, module_name
);
13278 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13280 gfc_error ("Mismatch in PURE attribute between MODULE "
13281 "PROCEDURE at %L and its interface in %s",
13282 &sym
->declared_at
, module_name
);
13286 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13288 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13289 "PROCEDURE at %L and its interface in %s",
13290 &sym
->declared_at
, module_name
);
13294 /* Check the result characteristics. */
13295 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13297 gfc_error ("%s between the MODULE PROCEDURE declaration "
13298 "in MODULE %qs and the declaration at %L in "
13300 errmsg
, module_name
, &sym
->declared_at
,
13301 submodule_name
? submodule_name
: module_name
);
13306 /* Check the characteristics of the formal arguments. */
13307 if (sym
->formal
&& sym
->formal_ns
)
13309 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13312 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13320 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13321 been defined and we now know their defined arguments, check that they fulfill
13322 the requirements of the standard for procedures used as finalizers. */
13325 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13327 gfc_finalizer
* list
;
13328 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13329 bool result
= true;
13330 bool seen_scalar
= false;
13333 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13336 gfc_resolve_finalizers (parent
, finalizable
);
13338 /* Ensure that derived-type components have a their finalizers resolved. */
13339 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13340 for (c
= derived
->components
; c
; c
= c
->next
)
13341 if (c
->ts
.type
== BT_DERIVED
13342 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13344 bool has_final2
= false;
13345 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13346 return false; /* Error. */
13347 has_final
= has_final
|| has_final2
;
13349 /* Return early if not finalizable. */
13353 *finalizable
= false;
13357 /* Walk over the list of finalizer-procedures, check them, and if any one
13358 does not fit in with the standard's definition, print an error and remove
13359 it from the list. */
13360 prev_link
= &derived
->f2k_derived
->finalizers
;
13361 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13363 gfc_formal_arglist
*dummy_args
;
13368 /* Skip this finalizer if we already resolved it. */
13369 if (list
->proc_tree
)
13371 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13372 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13373 seen_scalar
= true;
13374 prev_link
= &(list
->next
);
13378 /* Check this exists and is a SUBROUTINE. */
13379 if (!list
->proc_sym
->attr
.subroutine
)
13381 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13382 list
->proc_sym
->name
, &list
->where
);
13386 /* We should have exactly one argument. */
13387 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13388 if (!dummy_args
|| dummy_args
->next
)
13390 gfc_error ("FINAL procedure at %L must have exactly one argument",
13394 arg
= dummy_args
->sym
;
13396 /* This argument must be of our type. */
13397 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13399 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13400 &arg
->declared_at
, derived
->name
);
13404 /* It must neither be a pointer nor allocatable nor optional. */
13405 if (arg
->attr
.pointer
)
13407 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13408 &arg
->declared_at
);
13411 if (arg
->attr
.allocatable
)
13413 gfc_error ("Argument of FINAL procedure at %L must not be"
13414 " ALLOCATABLE", &arg
->declared_at
);
13417 if (arg
->attr
.optional
)
13419 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13420 &arg
->declared_at
);
13424 /* It must not be INTENT(OUT). */
13425 if (arg
->attr
.intent
== INTENT_OUT
)
13427 gfc_error ("Argument of FINAL procedure at %L must not be"
13428 " INTENT(OUT)", &arg
->declared_at
);
13432 /* Warn if the procedure is non-scalar and not assumed shape. */
13433 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13434 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13435 gfc_warning (OPT_Wsurprising
,
13436 "Non-scalar FINAL procedure at %L should have assumed"
13437 " shape argument", &arg
->declared_at
);
13439 /* Check that it does not match in kind and rank with a FINAL procedure
13440 defined earlier. To really loop over the *earlier* declarations,
13441 we need to walk the tail of the list as new ones were pushed at the
13443 /* TODO: Handle kind parameters once they are implemented. */
13444 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13445 for (i
= list
->next
; i
; i
= i
->next
)
13447 gfc_formal_arglist
*dummy_args
;
13449 /* Argument list might be empty; that is an error signalled earlier,
13450 but we nevertheless continued resolving. */
13451 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13454 gfc_symbol
* i_arg
= dummy_args
->sym
;
13455 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13456 if (i_rank
== my_rank
)
13458 gfc_error ("FINAL procedure %qs declared at %L has the same"
13459 " rank (%d) as %qs",
13460 list
->proc_sym
->name
, &list
->where
, my_rank
,
13461 i
->proc_sym
->name
);
13467 /* Is this the/a scalar finalizer procedure? */
13469 seen_scalar
= true;
13471 /* Find the symtree for this procedure. */
13472 gcc_assert (!list
->proc_tree
);
13473 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13475 prev_link
= &list
->next
;
13478 /* Remove wrong nodes immediately from the list so we don't risk any
13479 troubles in the future when they might fail later expectations. */
13482 *prev_link
= list
->next
;
13483 gfc_free_finalizer (i
);
13487 if (result
== false)
13490 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13491 were nodes in the list, must have been for arrays. It is surely a good
13492 idea to have a scalar version there if there's something to finalize. */
13493 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13494 gfc_warning (OPT_Wsurprising
,
13495 "Only array FINAL procedures declared for derived type %qs"
13496 " defined at %L, suggest also scalar one",
13497 derived
->name
, &derived
->declared_at
);
13499 vtab
= gfc_find_derived_vtab (derived
);
13500 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13501 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13504 *finalizable
= true;
13510 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13513 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13514 const char* generic_name
, locus where
)
13516 gfc_symbol
*sym1
, *sym2
;
13517 const char *pass1
, *pass2
;
13518 gfc_formal_arglist
*dummy_args
;
13520 gcc_assert (t1
->specific
&& t2
->specific
);
13521 gcc_assert (!t1
->specific
->is_generic
);
13522 gcc_assert (!t2
->specific
->is_generic
);
13523 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13525 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13526 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13531 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13532 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13533 || sym1
->attr
.function
!= sym2
->attr
.function
)
13535 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13536 " GENERIC %qs at %L",
13537 sym1
->name
, sym2
->name
, generic_name
, &where
);
13541 /* Determine PASS arguments. */
13542 if (t1
->specific
->nopass
)
13544 else if (t1
->specific
->pass_arg
)
13545 pass1
= t1
->specific
->pass_arg
;
13548 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13550 pass1
= dummy_args
->sym
->name
;
13554 if (t2
->specific
->nopass
)
13556 else if (t2
->specific
->pass_arg
)
13557 pass2
= t2
->specific
->pass_arg
;
13560 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13562 pass2
= dummy_args
->sym
->name
;
13567 /* Compare the interfaces. */
13568 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13569 NULL
, 0, pass1
, pass2
))
13571 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13572 sym1
->name
, sym2
->name
, generic_name
, &where
);
13580 /* Worker function for resolving a generic procedure binding; this is used to
13581 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13583 The difference between those cases is finding possible inherited bindings
13584 that are overridden, as one has to look for them in tb_sym_root,
13585 tb_uop_root or tb_op, respectively. Thus the caller must already find
13586 the super-type and set p->overridden correctly. */
13589 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13590 gfc_typebound_proc
* p
, const char* name
)
13592 gfc_tbp_generic
* target
;
13593 gfc_symtree
* first_target
;
13594 gfc_symtree
* inherited
;
13596 gcc_assert (p
&& p
->is_generic
);
13598 /* Try to find the specific bindings for the symtrees in our target-list. */
13599 gcc_assert (p
->u
.generic
);
13600 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13601 if (!target
->specific
)
13603 gfc_typebound_proc
* overridden_tbp
;
13604 gfc_tbp_generic
* g
;
13605 const char* target_name
;
13607 target_name
= target
->specific_st
->name
;
13609 /* Defined for this type directly. */
13610 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13612 target
->specific
= target
->specific_st
->n
.tb
;
13613 goto specific_found
;
13616 /* Look for an inherited specific binding. */
13619 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13624 gcc_assert (inherited
->n
.tb
);
13625 target
->specific
= inherited
->n
.tb
;
13626 goto specific_found
;
13630 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13631 " at %L", target_name
, name
, &p
->where
);
13634 /* Once we've found the specific binding, check it is not ambiguous with
13635 other specifics already found or inherited for the same GENERIC. */
13637 gcc_assert (target
->specific
);
13639 /* This must really be a specific binding! */
13640 if (target
->specific
->is_generic
)
13642 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13643 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13647 /* Check those already resolved on this type directly. */
13648 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13649 if (g
!= target
&& g
->specific
13650 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13653 /* Check for ambiguity with inherited specific targets. */
13654 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13655 overridden_tbp
= overridden_tbp
->overridden
)
13656 if (overridden_tbp
->is_generic
)
13658 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13660 gcc_assert (g
->specific
);
13661 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13667 /* If we attempt to "overwrite" a specific binding, this is an error. */
13668 if (p
->overridden
&& !p
->overridden
->is_generic
)
13670 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13671 " the same name", name
, &p
->where
);
13675 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13676 all must have the same attributes here. */
13677 first_target
= p
->u
.generic
->specific
->u
.specific
;
13678 gcc_assert (first_target
);
13679 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13680 p
->function
= first_target
->n
.sym
->attr
.function
;
13686 /* Resolve a GENERIC procedure binding for a derived type. */
13689 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13691 gfc_symbol
* super_type
;
13693 /* Find the overridden binding if any. */
13694 st
->n
.tb
->overridden
= NULL
;
13695 super_type
= gfc_get_derived_super_type (derived
);
13698 gfc_symtree
* overridden
;
13699 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13702 if (overridden
&& overridden
->n
.tb
)
13703 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13706 /* Resolve using worker function. */
13707 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13711 /* Retrieve the target-procedure of an operator binding and do some checks in
13712 common for intrinsic and user-defined type-bound operators. */
13715 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13717 gfc_symbol
* target_proc
;
13719 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13720 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13721 gcc_assert (target_proc
);
13723 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13724 if (target
->specific
->nopass
)
13726 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13730 return target_proc
;
13734 /* Resolve a type-bound intrinsic operator. */
13737 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13738 gfc_typebound_proc
* p
)
13740 gfc_symbol
* super_type
;
13741 gfc_tbp_generic
* target
;
13743 /* If there's already an error here, do nothing (but don't fail again). */
13747 /* Operators should always be GENERIC bindings. */
13748 gcc_assert (p
->is_generic
);
13750 /* Look for an overridden binding. */
13751 super_type
= gfc_get_derived_super_type (derived
);
13752 if (super_type
&& super_type
->f2k_derived
)
13753 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13756 p
->overridden
= NULL
;
13758 /* Resolve general GENERIC properties using worker function. */
13759 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13762 /* Check the targets to be procedures of correct interface. */
13763 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13765 gfc_symbol
* target_proc
;
13767 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13771 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13774 /* Add target to non-typebound operator list. */
13775 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13776 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13778 gfc_interface
*head
, *intr
;
13780 /* Preempt 'gfc_check_new_interface' for submodules, where the
13781 mechanism for handling module procedures winds up resolving
13782 operator interfaces twice and would otherwise cause an error. */
13783 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13784 if (intr
->sym
== target_proc
13785 && target_proc
->attr
.used_in_submodule
)
13788 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13789 target_proc
, p
->where
))
13791 head
= derived
->ns
->op
[op
];
13792 intr
= gfc_get_interface ();
13793 intr
->sym
= target_proc
;
13794 intr
->where
= p
->where
;
13796 derived
->ns
->op
[op
] = intr
;
13808 /* Resolve a type-bound user operator (tree-walker callback). */
13810 static gfc_symbol
* resolve_bindings_derived
;
13811 static bool resolve_bindings_result
;
13813 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13816 resolve_typebound_user_op (gfc_symtree
* stree
)
13818 gfc_symbol
* super_type
;
13819 gfc_tbp_generic
* target
;
13821 gcc_assert (stree
&& stree
->n
.tb
);
13823 if (stree
->n
.tb
->error
)
13826 /* Operators should always be GENERIC bindings. */
13827 gcc_assert (stree
->n
.tb
->is_generic
);
13829 /* Find overridden procedure, if any. */
13830 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13831 if (super_type
&& super_type
->f2k_derived
)
13833 gfc_symtree
* overridden
;
13834 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13835 stree
->name
, true, NULL
);
13837 if (overridden
&& overridden
->n
.tb
)
13838 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13841 stree
->n
.tb
->overridden
= NULL
;
13843 /* Resolve basically using worker function. */
13844 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13847 /* Check the targets to be functions of correct interface. */
13848 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13850 gfc_symbol
* target_proc
;
13852 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13856 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13863 resolve_bindings_result
= false;
13864 stree
->n
.tb
->error
= 1;
13868 /* Resolve the type-bound procedures for a derived type. */
13871 resolve_typebound_procedure (gfc_symtree
* stree
)
13875 gfc_symbol
* me_arg
;
13876 gfc_symbol
* super_type
;
13877 gfc_component
* comp
;
13879 gcc_assert (stree
);
13881 /* Undefined specific symbol from GENERIC target definition. */
13885 if (stree
->n
.tb
->error
)
13888 /* If this is a GENERIC binding, use that routine. */
13889 if (stree
->n
.tb
->is_generic
)
13891 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13896 /* Get the target-procedure to check it. */
13897 gcc_assert (!stree
->n
.tb
->is_generic
);
13898 gcc_assert (stree
->n
.tb
->u
.specific
);
13899 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13900 where
= stree
->n
.tb
->where
;
13902 /* Default access should already be resolved from the parser. */
13903 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13905 if (stree
->n
.tb
->deferred
)
13907 if (!check_proc_interface (proc
, &where
))
13912 /* If proc has not been resolved at this point, proc->name may
13913 actually be a USE associated entity. See PR fortran/89647. */
13914 if (!proc
->resolve_symbol_called
13915 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13918 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13919 if (tmp
&& tmp
->attr
.use_assoc
)
13921 proc
->module
= tmp
->module
;
13922 proc
->attr
.proc
= tmp
->attr
.proc
;
13923 proc
->attr
.function
= tmp
->attr
.function
;
13924 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13925 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13926 proc
->ts
= tmp
->ts
;
13927 proc
->result
= tmp
->result
;
13931 /* Check for F08:C465. */
13932 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13933 || (proc
->attr
.proc
!= PROC_MODULE
13934 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13935 || proc
->attr
.abstract
)
13937 gfc_error ("%qs must be a module procedure or an external "
13938 "procedure with an explicit interface at %L",
13939 proc
->name
, &where
);
13944 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13945 stree
->n
.tb
->function
= proc
->attr
.function
;
13947 /* Find the super-type of the current derived type. We could do this once and
13948 store in a global if speed is needed, but as long as not I believe this is
13949 more readable and clearer. */
13950 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13952 /* If PASS, resolve and check arguments if not already resolved / loaded
13953 from a .mod file. */
13954 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13956 gfc_formal_arglist
*dummy_args
;
13958 dummy_args
= gfc_sym_get_dummy_args (proc
);
13959 if (stree
->n
.tb
->pass_arg
)
13961 gfc_formal_arglist
*i
;
13963 /* If an explicit passing argument name is given, walk the arg-list
13964 and look for it. */
13967 stree
->n
.tb
->pass_arg_num
= 1;
13968 for (i
= dummy_args
; i
; i
= i
->next
)
13970 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13975 ++stree
->n
.tb
->pass_arg_num
;
13980 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13982 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13983 stree
->n
.tb
->pass_arg
);
13989 /* Otherwise, take the first one; there should in fact be at least
13991 stree
->n
.tb
->pass_arg_num
= 1;
13994 gfc_error ("Procedure %qs with PASS at %L must have at"
13995 " least one argument", proc
->name
, &where
);
13998 me_arg
= dummy_args
->sym
;
14001 /* Now check that the argument-type matches and the passed-object
14002 dummy argument is generally fine. */
14004 gcc_assert (me_arg
);
14006 if (me_arg
->ts
.type
!= BT_CLASS
)
14008 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14009 " at %L", proc
->name
, &where
);
14013 if (CLASS_DATA (me_arg
)->ts
.u
.derived
14014 != resolve_bindings_derived
)
14016 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14017 " the derived-type %qs", me_arg
->name
, proc
->name
,
14018 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
14022 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
14023 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
14025 gfc_error ("Passed-object dummy argument of %qs at %L must be"
14026 " scalar", proc
->name
, &where
);
14029 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14031 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14032 " be ALLOCATABLE", proc
->name
, &where
);
14035 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14037 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14038 " be POINTER", proc
->name
, &where
);
14043 /* If we are extending some type, check that we don't override a procedure
14044 flagged NON_OVERRIDABLE. */
14045 stree
->n
.tb
->overridden
= NULL
;
14048 gfc_symtree
* overridden
;
14049 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
14050 stree
->name
, true, NULL
);
14054 if (overridden
->n
.tb
)
14055 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
14057 if (!gfc_check_typebound_override (stree
, overridden
))
14062 /* See if there's a name collision with a component directly in this type. */
14063 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
14064 if (!strcmp (comp
->name
, stree
->name
))
14066 gfc_error ("Procedure %qs at %L has the same name as a component of"
14068 stree
->name
, &where
, resolve_bindings_derived
->name
);
14072 /* Try to find a name collision with an inherited component. */
14073 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
14076 gfc_error ("Procedure %qs at %L has the same name as an inherited"
14077 " component of %qs",
14078 stree
->name
, &where
, resolve_bindings_derived
->name
);
14082 stree
->n
.tb
->error
= 0;
14086 resolve_bindings_result
= false;
14087 stree
->n
.tb
->error
= 1;
14092 resolve_typebound_procedures (gfc_symbol
* derived
)
14095 gfc_symbol
* super_type
;
14097 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14100 super_type
= gfc_get_derived_super_type (derived
);
14102 resolve_symbol (super_type
);
14104 resolve_bindings_derived
= derived
;
14105 resolve_bindings_result
= true;
14107 if (derived
->f2k_derived
->tb_sym_root
)
14108 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14109 &resolve_typebound_procedure
);
14111 if (derived
->f2k_derived
->tb_uop_root
)
14112 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14113 &resolve_typebound_user_op
);
14115 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14117 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14118 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14119 (gfc_intrinsic_op
)op
, p
))
14120 resolve_bindings_result
= false;
14123 return resolve_bindings_result
;
14127 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14128 to give all identical derived types the same backend_decl. */
14130 add_dt_to_dt_list (gfc_symbol
*derived
)
14132 if (!derived
->dt_next
)
14134 if (gfc_derived_types
)
14136 derived
->dt_next
= gfc_derived_types
->dt_next
;
14137 gfc_derived_types
->dt_next
= derived
;
14141 derived
->dt_next
= derived
;
14143 gfc_derived_types
= derived
;
14148 /* Ensure that a derived-type is really not abstract, meaning that every
14149 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14152 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14157 if (!ensure_not_abstract_walker (sub
, st
->left
))
14159 if (!ensure_not_abstract_walker (sub
, st
->right
))
14162 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14164 gfc_symtree
* overriding
;
14165 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14168 gcc_assert (overriding
->n
.tb
);
14169 if (overriding
->n
.tb
->deferred
)
14171 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14172 " %qs is DEFERRED and not overridden",
14173 sub
->name
, &sub
->declared_at
, st
->name
);
14182 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14184 /* The algorithm used here is to recursively travel up the ancestry of sub
14185 and for each ancestor-type, check all bindings. If any of them is
14186 DEFERRED, look it up starting from sub and see if the found (overriding)
14187 binding is not DEFERRED.
14188 This is not the most efficient way to do this, but it should be ok and is
14189 clearer than something sophisticated. */
14191 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14193 if (!ancestor
->attr
.abstract
)
14196 /* Walk bindings of this ancestor. */
14197 if (ancestor
->f2k_derived
)
14200 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14205 /* Find next ancestor type and recurse on it. */
14206 ancestor
= gfc_get_derived_super_type (ancestor
);
14208 return ensure_not_abstract (sub
, ancestor
);
14214 /* This check for typebound defined assignments is done recursively
14215 since the order in which derived types are resolved is not always in
14216 order of the declarations. */
14219 check_defined_assignments (gfc_symbol
*derived
)
14223 for (c
= derived
->components
; c
; c
= c
->next
)
14225 if (!gfc_bt_struct (c
->ts
.type
)
14227 || c
->attr
.allocatable
14228 || c
->attr
.proc_pointer_comp
14229 || c
->attr
.class_pointer
14230 || c
->attr
.proc_pointer
)
14233 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14234 || (c
->ts
.u
.derived
->f2k_derived
14235 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14237 derived
->attr
.defined_assign_comp
= 1;
14241 check_defined_assignments (c
->ts
.u
.derived
);
14242 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14244 derived
->attr
.defined_assign_comp
= 1;
14251 /* Resolve a single component of a derived type or structure. */
14254 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14256 gfc_symbol
*super_type
;
14257 symbol_attribute
*attr
;
14259 if (c
->attr
.artificial
)
14262 /* Do not allow vtype components to be resolved in nameless namespaces
14263 such as block data because the procedure pointers will cause ICEs
14264 and vtables are not needed in these contexts. */
14265 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14266 && sym
->ns
->proc_name
== NULL
)
14270 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14271 && c
->attr
.codimension
14272 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14274 gfc_error ("Coarray component %qs at %L must be allocatable with "
14275 "deferred shape", c
->name
, &c
->loc
);
14280 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14281 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14283 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14284 "shall not be a coarray", c
->name
, &c
->loc
);
14289 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14290 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14291 || c
->attr
.allocatable
))
14293 gfc_error ("Component %qs at %L with coarray component "
14294 "shall be a nonpointer, nonallocatable scalar",
14300 if (c
->ts
.type
== BT_CLASS
)
14302 if (CLASS_DATA (c
))
14304 attr
= &(CLASS_DATA (c
)->attr
);
14306 /* Fix up contiguous attribute. */
14307 if (c
->attr
.contiguous
)
14308 attr
->contiguous
= 1;
14316 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14318 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14319 "is not an array pointer", c
->name
, &c
->loc
);
14323 /* F2003, 15.2.1 - length has to be one. */
14324 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14325 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14326 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14327 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14329 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14334 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14336 gfc_symbol
*ifc
= c
->ts
.interface
;
14338 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14344 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14346 /* Resolve interface and copy attributes. */
14347 if (ifc
->formal
&& !ifc
->formal_ns
)
14348 resolve_symbol (ifc
);
14349 if (ifc
->attr
.intrinsic
)
14350 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14354 c
->ts
= ifc
->result
->ts
;
14355 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14356 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14357 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14358 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14359 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14364 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14365 c
->attr
.pointer
= ifc
->attr
.pointer
;
14366 c
->attr
.dimension
= ifc
->attr
.dimension
;
14367 c
->as
= gfc_copy_array_spec (ifc
->as
);
14368 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14370 c
->ts
.interface
= ifc
;
14371 c
->attr
.function
= ifc
->attr
.function
;
14372 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14374 c
->attr
.pure
= ifc
->attr
.pure
;
14375 c
->attr
.elemental
= ifc
->attr
.elemental
;
14376 c
->attr
.recursive
= ifc
->attr
.recursive
;
14377 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14378 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14379 /* Copy char length. */
14380 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14382 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14383 if (cl
->length
&& !cl
->resolved
14384 && !gfc_resolve_expr (cl
->length
))
14393 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14395 /* Since PPCs are not implicitly typed, a PPC without an explicit
14396 interface must be a subroutine. */
14397 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14400 /* Procedure pointer components: Check PASS arg. */
14401 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14402 && !sym
->attr
.vtype
)
14404 gfc_symbol
* me_arg
;
14406 if (c
->tb
->pass_arg
)
14408 gfc_formal_arglist
* i
;
14410 /* If an explicit passing argument name is given, walk the arg-list
14411 and look for it. */
14414 c
->tb
->pass_arg_num
= 1;
14415 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14417 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14422 c
->tb
->pass_arg_num
++;
14427 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14428 "at %L has no argument %qs", c
->name
,
14429 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14436 /* Otherwise, take the first one; there should in fact be at least
14438 c
->tb
->pass_arg_num
= 1;
14439 if (!c
->ts
.interface
->formal
)
14441 gfc_error ("Procedure pointer component %qs with PASS at %L "
14442 "must have at least one argument",
14447 me_arg
= c
->ts
.interface
->formal
->sym
;
14450 /* Now check that the argument-type matches. */
14451 gcc_assert (me_arg
);
14452 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14453 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14454 || (me_arg
->ts
.type
== BT_CLASS
14455 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14457 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14458 " the derived type %qs", me_arg
->name
, c
->name
,
14459 me_arg
->name
, &c
->loc
, sym
->name
);
14464 /* Check for F03:C453. */
14465 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14467 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14468 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14474 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14476 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14477 "may not have the POINTER attribute", me_arg
->name
,
14478 c
->name
, me_arg
->name
, &c
->loc
);
14483 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14485 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14486 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14487 me_arg
->name
, &c
->loc
);
14492 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14494 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14495 " at %L", c
->name
, &c
->loc
);
14501 /* Check type-spec if this is not the parent-type component. */
14502 if (((sym
->attr
.is_class
14503 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14504 || c
!= sym
->components
->ts
.u
.derived
->components
))
14505 || (!sym
->attr
.is_class
14506 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14507 && !sym
->attr
.vtype
14508 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14511 super_type
= gfc_get_derived_super_type (sym
);
14513 /* If this type is an extension, set the accessibility of the parent
14516 && ((sym
->attr
.is_class
14517 && c
== sym
->components
->ts
.u
.derived
->components
)
14518 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14519 && strcmp (super_type
->name
, c
->name
) == 0)
14520 c
->attr
.access
= super_type
->attr
.access
;
14522 /* If this type is an extension, see if this component has the same name
14523 as an inherited type-bound procedure. */
14524 if (super_type
&& !sym
->attr
.is_class
14525 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14527 gfc_error ("Component %qs of %qs at %L has the same name as an"
14528 " inherited type-bound procedure",
14529 c
->name
, sym
->name
, &c
->loc
);
14533 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14534 && !c
->ts
.deferred
)
14536 if (c
->ts
.u
.cl
->length
== NULL
14537 || (!resolve_charlen(c
->ts
.u
.cl
))
14538 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14540 gfc_error ("Character length of component %qs needs to "
14541 "be a constant specification expression at %L",
14543 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14548 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14549 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14551 gfc_error ("Character component %qs of %qs at %L with deferred "
14552 "length must be a POINTER or ALLOCATABLE",
14553 c
->name
, sym
->name
, &c
->loc
);
14557 /* Add the hidden deferred length field. */
14558 if (c
->ts
.type
== BT_CHARACTER
14559 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14560 && !c
->attr
.function
14561 && !sym
->attr
.is_class
)
14563 char name
[GFC_MAX_SYMBOL_LEN
+9];
14564 gfc_component
*strlen
;
14565 sprintf (name
, "_%s_length", c
->name
);
14566 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14567 if (strlen
== NULL
)
14569 if (!gfc_add_component (sym
, name
, &strlen
))
14571 strlen
->ts
.type
= BT_INTEGER
;
14572 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14573 strlen
->attr
.access
= ACCESS_PRIVATE
;
14574 strlen
->attr
.artificial
= 1;
14578 if (c
->ts
.type
== BT_DERIVED
14579 && sym
->component_access
!= ACCESS_PRIVATE
14580 && gfc_check_symbol_access (sym
)
14581 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14582 && !c
->ts
.u
.derived
->attr
.use_assoc
14583 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14584 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14585 "PRIVATE type and cannot be a component of "
14586 "%qs, which is PUBLIC at %L", c
->name
,
14587 sym
->name
, &sym
->declared_at
))
14590 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14592 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14593 "type %s", c
->name
, &c
->loc
, sym
->name
);
14597 if (sym
->attr
.sequence
)
14599 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14601 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14602 "not have the SEQUENCE attribute",
14603 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14608 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14609 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14610 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14611 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14612 CLASS_DATA (c
)->ts
.u
.derived
14613 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14615 /* If an allocatable component derived type is of the same type as
14616 the enclosing derived type, we need a vtable generating so that
14617 the __deallocate procedure is created. */
14618 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14619 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14620 gfc_find_vtab (&c
->ts
);
14622 /* Ensure that all the derived type components are put on the
14623 derived type list; even in formal namespaces, where derived type
14624 pointer components might not have been declared. */
14625 if (c
->ts
.type
== BT_DERIVED
14627 && c
->ts
.u
.derived
->components
14629 && sym
!= c
->ts
.u
.derived
)
14630 add_dt_to_dt_list (c
->ts
.u
.derived
);
14632 if (!gfc_resolve_array_spec (c
->as
,
14633 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14634 || c
->attr
.allocatable
)))
14637 if (c
->initializer
&& !sym
->attr
.vtype
14638 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14639 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14646 /* Be nice about the locus for a structure expression - show the locus of the
14647 first non-null sub-expression if we can. */
14650 cons_where (gfc_expr
*struct_expr
)
14652 gfc_constructor
*cons
;
14654 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14656 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14657 for (; cons
; cons
= gfc_constructor_next (cons
))
14659 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14660 return &cons
->expr
->where
;
14663 return &struct_expr
->where
;
14666 /* Resolve the components of a structure type. Much less work than derived
14670 resolve_fl_struct (gfc_symbol
*sym
)
14673 gfc_expr
*init
= NULL
;
14676 /* Make sure UNIONs do not have overlapping initializers. */
14677 if (sym
->attr
.flavor
== FL_UNION
)
14679 for (c
= sym
->components
; c
; c
= c
->next
)
14681 if (init
&& c
->initializer
)
14683 gfc_error ("Conflicting initializers in union at %L and %L",
14684 cons_where (init
), cons_where (c
->initializer
));
14685 gfc_free_expr (c
->initializer
);
14686 c
->initializer
= NULL
;
14689 init
= c
->initializer
;
14694 for (c
= sym
->components
; c
; c
= c
->next
)
14695 if (!resolve_component (c
, sym
))
14701 if (sym
->components
)
14702 add_dt_to_dt_list (sym
);
14708 /* Resolve the components of a derived type. This does not have to wait until
14709 resolution stage, but can be done as soon as the dt declaration has been
14713 resolve_fl_derived0 (gfc_symbol
*sym
)
14715 gfc_symbol
* super_type
;
14717 gfc_formal_arglist
*f
;
14720 if (sym
->attr
.unlimited_polymorphic
)
14723 super_type
= gfc_get_derived_super_type (sym
);
14726 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14728 gfc_error ("As extending type %qs at %L has a coarray component, "
14729 "parent type %qs shall also have one", sym
->name
,
14730 &sym
->declared_at
, super_type
->name
);
14734 /* Ensure the extended type gets resolved before we do. */
14735 if (super_type
&& !resolve_fl_derived0 (super_type
))
14738 /* An ABSTRACT type must be extensible. */
14739 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14741 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14742 sym
->name
, &sym
->declared_at
);
14746 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14750 for ( ; c
!= NULL
; c
= c
->next
)
14751 if (!resolve_component (c
, sym
))
14757 /* Now add the caf token field, where needed. */
14758 if (flag_coarray
!= GFC_FCOARRAY_NONE
14759 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14761 for (c
= sym
->components
; c
; c
= c
->next
)
14762 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14763 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14765 char name
[GFC_MAX_SYMBOL_LEN
+9];
14766 gfc_component
*token
;
14767 sprintf (name
, "_caf_%s", c
->name
);
14768 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14771 if (!gfc_add_component (sym
, name
, &token
))
14773 token
->ts
.type
= BT_VOID
;
14774 token
->ts
.kind
= gfc_default_integer_kind
;
14775 token
->attr
.access
= ACCESS_PRIVATE
;
14776 token
->attr
.artificial
= 1;
14777 token
->attr
.caf_token
= 1;
14782 check_defined_assignments (sym
);
14784 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14785 sym
->attr
.defined_assign_comp
14786 = super_type
->attr
.defined_assign_comp
;
14788 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14789 all DEFERRED bindings are overridden. */
14790 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14791 && !sym
->attr
.is_class
14792 && !ensure_not_abstract (sym
, super_type
))
14795 /* Check that there is a component for every PDT parameter. */
14796 if (sym
->attr
.pdt_template
)
14798 for (f
= sym
->formal
; f
; f
= f
->next
)
14802 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14805 gfc_error ("Parameterized type %qs does not have a component "
14806 "corresponding to parameter %qs at %L", sym
->name
,
14807 f
->sym
->name
, &sym
->declared_at
);
14813 /* Add derived type to the derived type list. */
14814 add_dt_to_dt_list (sym
);
14820 /* The following procedure does the full resolution of a derived type,
14821 including resolution of all type-bound procedures (if present). In contrast
14822 to 'resolve_fl_derived0' this can only be done after the module has been
14823 parsed completely. */
14826 resolve_fl_derived (gfc_symbol
*sym
)
14828 gfc_symbol
*gen_dt
= NULL
;
14830 if (sym
->attr
.unlimited_polymorphic
)
14833 if (!sym
->attr
.is_class
)
14834 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14835 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14836 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14837 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14838 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14839 "%qs at %L being the same name as derived "
14840 "type at %L", sym
->name
,
14841 gen_dt
->generic
->sym
== sym
14842 ? gen_dt
->generic
->next
->sym
->name
14843 : gen_dt
->generic
->sym
->name
,
14844 gen_dt
->generic
->sym
== sym
14845 ? &gen_dt
->generic
->next
->sym
->declared_at
14846 : &gen_dt
->generic
->sym
->declared_at
,
14847 &sym
->declared_at
))
14850 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14852 gfc_error ("Derived type %qs at %L has not been declared",
14853 sym
->name
, &sym
->declared_at
);
14857 /* Resolve the finalizer procedures. */
14858 if (!gfc_resolve_finalizers (sym
, NULL
))
14861 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14863 /* Fix up incomplete CLASS symbols. */
14864 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14865 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14867 /* Nothing more to do for unlimited polymorphic entities. */
14868 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14870 else if (vptr
->ts
.u
.derived
== NULL
)
14872 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14874 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14875 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14880 if (!resolve_fl_derived0 (sym
))
14883 /* Resolve the type-bound procedures. */
14884 if (!resolve_typebound_procedures (sym
))
14887 /* Generate module vtables subject to their accessibility and their not
14888 being vtables or pdt templates. If this is not done class declarations
14889 in external procedures wind up with their own version and so SELECT TYPE
14890 fails because the vptrs do not have the same address. */
14891 if (gfc_option
.allow_std
& GFC_STD_F2003
14892 && sym
->ns
->proc_name
14893 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14894 && sym
->attr
.access
!= ACCESS_PRIVATE
14895 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14897 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14898 gfc_set_sym_referenced (vtab
);
14906 resolve_fl_namelist (gfc_symbol
*sym
)
14911 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14913 /* Check again, the check in match only works if NAMELIST comes
14915 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14917 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14918 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14922 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14923 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14924 "with assumed shape in namelist %qs at %L",
14925 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14928 if (is_non_constant_shape_array (nl
->sym
)
14929 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14930 "with nonconstant shape in namelist %qs at %L",
14931 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14934 if (nl
->sym
->ts
.type
== BT_CHARACTER
14935 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14936 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14937 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14938 "nonconstant character length in "
14939 "namelist %qs at %L", nl
->sym
->name
,
14940 sym
->name
, &sym
->declared_at
))
14945 /* Reject PRIVATE objects in a PUBLIC namelist. */
14946 if (gfc_check_symbol_access (sym
))
14948 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14950 if (!nl
->sym
->attr
.use_assoc
14951 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14952 && !gfc_check_symbol_access (nl
->sym
))
14954 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14955 "cannot be member of PUBLIC namelist %qs at %L",
14956 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14960 if (nl
->sym
->ts
.type
== BT_DERIVED
14961 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14962 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14964 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14965 "namelist %qs at %L with ALLOCATABLE "
14966 "or POINTER components", nl
->sym
->name
,
14967 sym
->name
, &sym
->declared_at
))
14972 /* Types with private components that came here by USE-association. */
14973 if (nl
->sym
->ts
.type
== BT_DERIVED
14974 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14976 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14977 "components and cannot be member of namelist %qs at %L",
14978 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14982 /* Types with private components that are defined in the same module. */
14983 if (nl
->sym
->ts
.type
== BT_DERIVED
14984 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14985 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14987 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14988 "cannot be a member of PUBLIC namelist %qs at %L",
14989 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14996 /* 14.1.2 A module or internal procedure represent local entities
14997 of the same type as a namelist member and so are not allowed. */
14998 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
15000 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
15003 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
15004 if ((nl
->sym
== sym
->ns
->proc_name
)
15006 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
15011 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
15012 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
15014 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
15015 "attribute in %qs at %L", nlsym
->name
,
15016 &sym
->declared_at
);
15026 resolve_fl_parameter (gfc_symbol
*sym
)
15028 /* A parameter array's shape needs to be constant. */
15029 if (sym
->as
!= NULL
15030 && (sym
->as
->type
== AS_DEFERRED
15031 || is_non_constant_shape_array (sym
)))
15033 gfc_error ("Parameter array %qs at %L cannot be automatic "
15034 "or of deferred shape", sym
->name
, &sym
->declared_at
);
15038 /* Constraints on deferred type parameter. */
15039 if (!deferred_requirements (sym
))
15042 /* Make sure a parameter that has been implicitly typed still
15043 matches the implicit type, since PARAMETER statements can precede
15044 IMPLICIT statements. */
15045 if (sym
->attr
.implicit_type
15046 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
15049 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
15050 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
15054 /* Make sure the types of derived parameters are consistent. This
15055 type checking is deferred until resolution because the type may
15056 refer to a derived type from the host. */
15057 if (sym
->ts
.type
== BT_DERIVED
15058 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
15060 gfc_error ("Incompatible derived type in PARAMETER at %L",
15061 &sym
->value
->where
);
15065 /* F03:C509,C514. */
15066 if (sym
->ts
.type
== BT_CLASS
)
15068 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
15069 sym
->name
, &sym
->declared_at
);
15077 /* Called by resolve_symbol to check PDTs. */
15080 resolve_pdt (gfc_symbol
* sym
)
15082 gfc_symbol
*derived
= NULL
;
15083 gfc_actual_arglist
*param
;
15085 bool const_len_exprs
= true;
15086 bool assumed_len_exprs
= false;
15087 symbol_attribute
*attr
;
15089 if (sym
->ts
.type
== BT_DERIVED
)
15091 derived
= sym
->ts
.u
.derived
;
15092 attr
= &(sym
->attr
);
15094 else if (sym
->ts
.type
== BT_CLASS
)
15096 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15097 attr
= &(CLASS_DATA (sym
)->attr
);
15100 gcc_unreachable ();
15102 gcc_assert (derived
->attr
.pdt_type
);
15104 for (param
= sym
->param_list
; param
; param
= param
->next
)
15106 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15108 if (c
->attr
.pdt_kind
)
15111 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15112 && c
->attr
.pdt_len
)
15113 const_len_exprs
= false;
15114 else if (param
->spec_type
== SPEC_ASSUMED
)
15115 assumed_len_exprs
= true;
15117 if (param
->spec_type
== SPEC_DEFERRED
15118 && !attr
->allocatable
&& !attr
->pointer
)
15119 gfc_error ("The object %qs at %L has a deferred LEN "
15120 "parameter %qs and is neither allocatable "
15121 "nor a pointer", sym
->name
, &sym
->declared_at
,
15126 if (!const_len_exprs
15127 && (sym
->ns
->proc_name
->attr
.is_main_program
15128 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15129 || sym
->attr
.save
!= SAVE_NONE
))
15130 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15131 "SAVE attribute or be a variable declared in the "
15132 "main program, a module or a submodule(F08/C513)",
15133 sym
->name
, &sym
->declared_at
);
15135 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15136 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15137 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15138 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15139 sym
->name
, &sym
->declared_at
);
15143 /* Do anything necessary to resolve a symbol. Right now, we just
15144 assume that an otherwise unknown symbol is a variable. This sort
15145 of thing commonly happens for symbols in module. */
15148 resolve_symbol (gfc_symbol
*sym
)
15150 int check_constant
, mp_flag
;
15151 gfc_symtree
*symtree
;
15152 gfc_symtree
*this_symtree
;
15155 symbol_attribute class_attr
;
15156 gfc_array_spec
*as
;
15157 bool saved_specification_expr
;
15159 if (sym
->resolve_symbol_called
>= 1)
15161 sym
->resolve_symbol_called
= 1;
15163 /* No symbol will ever have union type; only components can be unions.
15164 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15165 (just like derived type declaration symbols have flavor FL_DERIVED). */
15166 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15168 /* Coarrayed polymorphic objects with allocatable or pointer components are
15169 yet unsupported for -fcoarray=lib. */
15170 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15171 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15172 && CLASS_DATA (sym
)->attr
.codimension
15173 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15174 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15176 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15177 "type coarrays at %L are unsupported", &sym
->declared_at
);
15181 if (sym
->attr
.artificial
)
15184 if (sym
->attr
.unlimited_polymorphic
)
15187 if (sym
->attr
.flavor
== FL_UNKNOWN
15188 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15189 && !sym
->attr
.generic
&& !sym
->attr
.external
15190 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15191 && sym
->ts
.type
== BT_UNKNOWN
))
15194 /* If we find that a flavorless symbol is an interface in one of the
15195 parent namespaces, find its symtree in this namespace, free the
15196 symbol and set the symtree to point to the interface symbol. */
15197 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15199 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15200 if (symtree
&& (symtree
->n
.sym
->generic
||
15201 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15202 && sym
->ns
->construct_entities
)))
15204 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15206 if (this_symtree
->n
.sym
== sym
)
15208 symtree
->n
.sym
->refs
++;
15209 gfc_release_symbol (sym
);
15210 this_symtree
->n
.sym
= symtree
->n
.sym
;
15216 /* Otherwise give it a flavor according to such attributes as
15218 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15219 && sym
->attr
.intrinsic
== 0)
15220 sym
->attr
.flavor
= FL_VARIABLE
;
15221 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15223 sym
->attr
.flavor
= FL_PROCEDURE
;
15224 if (sym
->attr
.dimension
)
15225 sym
->attr
.function
= 1;
15229 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15230 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15232 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15233 && !resolve_procedure_interface (sym
))
15236 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15237 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15239 if (sym
->attr
.external
)
15240 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15241 "at %L", &sym
->declared_at
);
15243 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15244 "at %L", &sym
->declared_at
);
15249 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15252 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15253 && !resolve_fl_struct (sym
))
15256 /* Symbols that are module procedures with results (functions) have
15257 the types and array specification copied for type checking in
15258 procedures that call them, as well as for saving to a module
15259 file. These symbols can't stand the scrutiny that their results
15261 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15263 /* Make sure that the intrinsic is consistent with its internal
15264 representation. This needs to be done before assigning a default
15265 type to avoid spurious warnings. */
15266 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15267 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15270 /* Resolve associate names. */
15272 resolve_assoc_var (sym
, true);
15274 /* Assign default type to symbols that need one and don't have one. */
15275 if (sym
->ts
.type
== BT_UNKNOWN
)
15277 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15279 gfc_set_default_type (sym
, 1, NULL
);
15282 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15283 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15284 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15285 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15287 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15289 /* The specific case of an external procedure should emit an error
15290 in the case that there is no implicit type. */
15293 if (!sym
->attr
.mixed_entry_master
)
15294 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15298 /* Result may be in another namespace. */
15299 resolve_symbol (sym
->result
);
15301 if (!sym
->result
->attr
.proc_pointer
)
15303 sym
->ts
= sym
->result
->ts
;
15304 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15305 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15306 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15307 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15308 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15313 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15315 bool saved_specification_expr
= specification_expr
;
15316 specification_expr
= true;
15317 gfc_resolve_array_spec (sym
->result
->as
, false);
15318 specification_expr
= saved_specification_expr
;
15321 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15323 as
= CLASS_DATA (sym
)->as
;
15324 class_attr
= CLASS_DATA (sym
)->attr
;
15325 class_attr
.pointer
= class_attr
.class_pointer
;
15329 class_attr
= sym
->attr
;
15334 if (sym
->attr
.contiguous
15335 && (!class_attr
.dimension
15336 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15337 && !class_attr
.pointer
)))
15339 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15340 "array pointer or an assumed-shape or assumed-rank array",
15341 sym
->name
, &sym
->declared_at
);
15345 /* Assumed size arrays and assumed shape arrays must be dummy
15346 arguments. Array-spec's of implied-shape should have been resolved to
15347 AS_EXPLICIT already. */
15351 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15352 specification expression. */
15353 if (as
->type
== AS_IMPLIED_SHAPE
)
15356 for (i
=0; i
<as
->rank
; i
++)
15358 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15360 gfc_error ("Bad specification for assumed size array at %L",
15361 &as
->lower
[i
]->where
);
15368 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15369 || as
->type
== AS_ASSUMED_SHAPE
)
15370 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15372 if (as
->type
== AS_ASSUMED_SIZE
)
15373 gfc_error ("Assumed size array at %L must be a dummy argument",
15374 &sym
->declared_at
);
15376 gfc_error ("Assumed shape array at %L must be a dummy argument",
15377 &sym
->declared_at
);
15380 /* TS 29113, C535a. */
15381 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15382 && !sym
->attr
.select_type_temporary
15383 && !(cs_base
&& cs_base
->current
15384 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15386 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15387 &sym
->declared_at
);
15390 if (as
->type
== AS_ASSUMED_RANK
15391 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15393 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15394 "CODIMENSION attribute", &sym
->declared_at
);
15399 /* Make sure symbols with known intent or optional are really dummy
15400 variable. Because of ENTRY statement, this has to be deferred
15401 until resolution time. */
15403 if (!sym
->attr
.dummy
15404 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15406 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15410 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15412 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15413 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15417 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15419 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15420 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15422 gfc_error ("Character dummy variable %qs at %L with VALUE "
15423 "attribute must have constant length",
15424 sym
->name
, &sym
->declared_at
);
15428 if (sym
->ts
.is_c_interop
15429 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15431 gfc_error ("C interoperable character dummy variable %qs at %L "
15432 "with VALUE attribute must have length one",
15433 sym
->name
, &sym
->declared_at
);
15438 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15439 && sym
->ts
.u
.derived
->attr
.generic
)
15441 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15442 if (!sym
->ts
.u
.derived
)
15444 gfc_error ("The derived type %qs at %L is of type %qs, "
15445 "which has not been defined", sym
->name
,
15446 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15447 sym
->ts
.type
= BT_UNKNOWN
;
15452 /* Use the same constraints as TYPE(*), except for the type check
15453 and that only scalars and assumed-size arrays are permitted. */
15454 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15456 if (!sym
->attr
.dummy
)
15458 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15459 "a dummy argument", sym
->name
, &sym
->declared_at
);
15463 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15464 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15465 && sym
->ts
.type
!= BT_COMPLEX
)
15467 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15468 "of type TYPE(*) or of an numeric intrinsic type",
15469 sym
->name
, &sym
->declared_at
);
15473 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15474 || sym
->attr
.pointer
|| sym
->attr
.value
)
15476 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15477 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15478 "attribute", sym
->name
, &sym
->declared_at
);
15482 if (sym
->attr
.intent
== INTENT_OUT
)
15484 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15485 "have the INTENT(OUT) attribute",
15486 sym
->name
, &sym
->declared_at
);
15489 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15491 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15492 "either be a scalar or an assumed-size array",
15493 sym
->name
, &sym
->declared_at
);
15497 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15498 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15500 sym
->ts
.type
= BT_ASSUMED
;
15501 sym
->as
= gfc_get_array_spec ();
15502 sym
->as
->type
= AS_ASSUMED_SIZE
;
15504 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15506 else if (sym
->ts
.type
== BT_ASSUMED
)
15508 /* TS 29113, C407a. */
15509 if (!sym
->attr
.dummy
)
15511 gfc_error ("Assumed type of variable %s at %L is only permitted "
15512 "for dummy variables", sym
->name
, &sym
->declared_at
);
15515 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15516 || sym
->attr
.pointer
|| sym
->attr
.value
)
15518 gfc_error ("Assumed-type variable %s at %L may not have the "
15519 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15520 sym
->name
, &sym
->declared_at
);
15523 if (sym
->attr
.intent
== INTENT_OUT
)
15525 gfc_error ("Assumed-type variable %s at %L may not have the "
15526 "INTENT(OUT) attribute",
15527 sym
->name
, &sym
->declared_at
);
15530 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15532 gfc_error ("Assumed-type variable %s at %L shall not be an "
15533 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15538 /* If the symbol is marked as bind(c), that it is declared at module level
15539 scope and verify its type and kind. Do not do the latter for symbols
15540 that are implicitly typed because that is handled in
15541 gfc_set_default_type. Handle dummy arguments and procedure definitions
15542 separately. Also, anything that is use associated is not handled here
15543 but instead is handled in the module it is declared in. Finally, derived
15544 type definitions are allowed to be BIND(C) since that only implies that
15545 they're interoperable, and they are checked fully for interoperability
15546 when a variable is declared of that type. */
15547 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15548 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15549 && sym
->attr
.flavor
!= FL_DERIVED
)
15553 /* First, make sure the variable is declared at the
15554 module-level scope (J3/04-007, Section 15.3). */
15555 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15556 sym
->attr
.in_common
== 0)
15558 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15559 "is neither a COMMON block nor declared at the "
15560 "module level scope", sym
->name
, &(sym
->declared_at
));
15563 else if (sym
->ts
.type
== BT_CHARACTER
15564 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15565 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15566 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15568 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15569 sym
->name
, &sym
->declared_at
);
15572 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15574 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15576 else if (sym
->attr
.implicit_type
== 0)
15578 /* If type() declaration, we need to verify that the components
15579 of the given type are all C interoperable, etc. */
15580 if (sym
->ts
.type
== BT_DERIVED
&&
15581 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15583 /* Make sure the user marked the derived type as BIND(C). If
15584 not, call the verify routine. This could print an error
15585 for the derived type more than once if multiple variables
15586 of that type are declared. */
15587 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15588 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15592 /* Verify the variable itself as C interoperable if it
15593 is BIND(C). It is not possible for this to succeed if
15594 the verify_bind_c_derived_type failed, so don't have to handle
15595 any error returned by verify_bind_c_derived_type. */
15596 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15597 sym
->common_block
);
15602 /* clear the is_bind_c flag to prevent reporting errors more than
15603 once if something failed. */
15604 sym
->attr
.is_bind_c
= 0;
15609 /* If a derived type symbol has reached this point, without its
15610 type being declared, we have an error. Notice that most
15611 conditions that produce undefined derived types have already
15612 been dealt with. However, the likes of:
15613 implicit type(t) (t) ..... call foo (t) will get us here if
15614 the type is not declared in the scope of the implicit
15615 statement. Change the type to BT_UNKNOWN, both because it is so
15616 and to prevent an ICE. */
15617 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15618 && sym
->ts
.u
.derived
->components
== NULL
15619 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15621 gfc_error ("The derived type %qs at %L is of type %qs, "
15622 "which has not been defined", sym
->name
,
15623 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15624 sym
->ts
.type
= BT_UNKNOWN
;
15628 /* Make sure that the derived type has been resolved and that the
15629 derived type is visible in the symbol's namespace, if it is a
15630 module function and is not PRIVATE. */
15631 if (sym
->ts
.type
== BT_DERIVED
15632 && sym
->ts
.u
.derived
->attr
.use_assoc
15633 && sym
->ns
->proc_name
15634 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15635 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15638 /* Unless the derived-type declaration is use associated, Fortran 95
15639 does not allow public entries of private derived types.
15640 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15641 161 in 95-006r3. */
15642 if (sym
->ts
.type
== BT_DERIVED
15643 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15644 && !sym
->ts
.u
.derived
->attr
.use_assoc
15645 && gfc_check_symbol_access (sym
)
15646 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15647 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15648 "derived type %qs",
15649 (sym
->attr
.flavor
== FL_PARAMETER
)
15650 ? "parameter" : "variable",
15651 sym
->name
, &sym
->declared_at
,
15652 sym
->ts
.u
.derived
->name
))
15655 /* F2008, C1302. */
15656 if (sym
->ts
.type
== BT_DERIVED
15657 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15658 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15659 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15660 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15662 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15663 "type LOCK_TYPE must be a coarray", sym
->name
,
15664 &sym
->declared_at
);
15668 /* TS18508, C702/C703. */
15669 if (sym
->ts
.type
== BT_DERIVED
15670 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15671 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15672 || sym
->ts
.u
.derived
->attr
.event_comp
)
15673 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15675 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15676 "type EVENT_TYPE must be a coarray", sym
->name
,
15677 &sym
->declared_at
);
15681 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15682 default initialization is defined (5.1.2.4.4). */
15683 if (sym
->ts
.type
== BT_DERIVED
15685 && sym
->attr
.intent
== INTENT_OUT
15687 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15689 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15691 if (c
->initializer
)
15693 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15694 "ASSUMED SIZE and so cannot have a default initializer",
15695 sym
->name
, &sym
->declared_at
);
15702 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15703 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15705 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15706 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15711 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15712 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15714 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15715 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15720 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15721 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15722 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15723 || class_attr
.codimension
)
15724 && (sym
->attr
.result
|| sym
->result
== sym
))
15726 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15727 "a coarray component", sym
->name
, &sym
->declared_at
);
15732 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15733 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15735 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15736 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15741 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15742 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15743 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15744 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15745 || class_attr
.allocatable
))
15747 gfc_error ("Variable %qs at %L with coarray component shall be a "
15748 "nonpointer, nonallocatable scalar, which is not a coarray",
15749 sym
->name
, &sym
->declared_at
);
15753 /* F2008, C526. The function-result case was handled above. */
15754 if (class_attr
.codimension
15755 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15756 || sym
->attr
.select_type_temporary
15757 || sym
->attr
.associate_var
15758 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15759 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15760 || sym
->ns
->proc_name
->attr
.is_main_program
15761 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15763 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15764 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15768 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15769 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15771 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15772 "deferred shape", sym
->name
, &sym
->declared_at
);
15775 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15776 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15778 gfc_error ("Allocatable coarray variable %qs at %L must have "
15779 "deferred shape", sym
->name
, &sym
->declared_at
);
15784 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15785 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15786 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15787 || (class_attr
.codimension
&& class_attr
.allocatable
))
15788 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15790 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15791 "allocatable coarray or have coarray components",
15792 sym
->name
, &sym
->declared_at
);
15796 if (class_attr
.codimension
&& sym
->attr
.dummy
15797 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15799 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15800 "procedure %qs", sym
->name
, &sym
->declared_at
,
15801 sym
->ns
->proc_name
->name
);
15805 if (sym
->ts
.type
== BT_LOGICAL
15806 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15807 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15808 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15811 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15812 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15814 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15815 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15816 "%L with non-C_Bool kind in BIND(C) procedure "
15817 "%qs", sym
->name
, &sym
->declared_at
,
15818 sym
->ns
->proc_name
->name
))
15820 else if (!gfc_logical_kinds
[i
].c_bool
15821 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15822 "%qs at %L with non-C_Bool kind in "
15823 "BIND(C) procedure %qs", sym
->name
,
15825 sym
->attr
.function
? sym
->name
15826 : sym
->ns
->proc_name
->name
))
15830 switch (sym
->attr
.flavor
)
15833 if (!resolve_fl_variable (sym
, mp_flag
))
15838 if (sym
->formal
&& !sym
->formal_ns
)
15840 /* Check that none of the arguments are a namelist. */
15841 gfc_formal_arglist
*formal
= sym
->formal
;
15843 for (; formal
; formal
= formal
->next
)
15844 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15846 gfc_error ("Namelist %qs cannot be an argument to "
15847 "subroutine or function at %L",
15848 formal
->sym
->name
, &sym
->declared_at
);
15853 if (!resolve_fl_procedure (sym
, mp_flag
))
15858 if (!resolve_fl_namelist (sym
))
15863 if (!resolve_fl_parameter (sym
))
15871 /* Resolve array specifier. Check as well some constraints
15872 on COMMON blocks. */
15874 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15876 /* Set the formal_arg_flag so that check_conflict will not throw
15877 an error for host associated variables in the specification
15878 expression for an array_valued function. */
15879 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15880 formal_arg_flag
= true;
15882 saved_specification_expr
= specification_expr
;
15883 specification_expr
= true;
15884 gfc_resolve_array_spec (sym
->as
, check_constant
);
15885 specification_expr
= saved_specification_expr
;
15887 formal_arg_flag
= false;
15889 /* Resolve formal namespaces. */
15890 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15891 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15892 gfc_resolve (sym
->formal_ns
);
15894 /* Make sure the formal namespace is present. */
15895 if (sym
->formal
&& !sym
->formal_ns
)
15897 gfc_formal_arglist
*formal
= sym
->formal
;
15898 while (formal
&& !formal
->sym
)
15899 formal
= formal
->next
;
15903 sym
->formal_ns
= formal
->sym
->ns
;
15904 if (sym
->ns
!= formal
->sym
->ns
)
15905 sym
->formal_ns
->refs
++;
15909 /* Check threadprivate restrictions. */
15910 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15911 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15912 && (!sym
->attr
.in_common
15913 && sym
->module
== NULL
15914 && (sym
->ns
->proc_name
== NULL
15915 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15916 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15918 /* Check omp declare target restrictions. */
15919 if (sym
->attr
.omp_declare_target
15920 && sym
->attr
.flavor
== FL_VARIABLE
15922 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15923 && (!sym
->attr
.in_common
15924 && sym
->module
== NULL
15925 && (sym
->ns
->proc_name
== NULL
15926 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15927 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15928 sym
->name
, &sym
->declared_at
);
15930 /* If we have come this far we can apply default-initializers, as
15931 described in 14.7.5, to those variables that have not already
15932 been assigned one. */
15933 if (sym
->ts
.type
== BT_DERIVED
15935 && !sym
->attr
.allocatable
15936 && !sym
->attr
.alloc_comp
)
15938 symbol_attribute
*a
= &sym
->attr
;
15940 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15941 && !a
->in_common
&& !a
->use_assoc
15943 && !((a
->function
|| a
->result
)
15945 || sym
->ts
.u
.derived
->attr
.alloc_comp
15946 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15947 && !(a
->function
&& sym
!= sym
->result
))
15948 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15949 apply_default_init (sym
);
15950 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15951 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15952 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15953 /* Mark the result symbol to be referenced, when it has allocatable
15955 sym
->result
->attr
.referenced
= 1;
15958 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15959 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15960 && !CLASS_DATA (sym
)->attr
.class_pointer
15961 && !CLASS_DATA (sym
)->attr
.allocatable
)
15962 apply_default_init (sym
);
15964 /* If this symbol has a type-spec, check it. */
15965 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15966 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15967 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15970 if (sym
->param_list
)
15975 /************* Resolve DATA statements *************/
15979 gfc_data_value
*vnode
;
15985 /* Advance the values structure to point to the next value in the data list. */
15988 next_data_value (void)
15990 while (mpz_cmp_ui (values
.left
, 0) == 0)
15993 if (values
.vnode
->next
== NULL
)
15996 values
.vnode
= values
.vnode
->next
;
15997 mpz_set (values
.left
, values
.vnode
->repeat
);
16005 check_data_variable (gfc_data_variable
*var
, locus
*where
)
16011 ar_type mark
= AR_UNKNOWN
;
16013 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
16019 if (!gfc_resolve_expr (var
->expr
))
16023 mpz_init_set_si (offset
, 0);
16026 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
16027 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
16028 e
= e
->value
.function
.actual
->expr
;
16030 if (e
->expr_type
!= EXPR_VARIABLE
)
16032 gfc_error ("Expecting definable entity near %L", where
);
16036 sym
= e
->symtree
->n
.sym
;
16038 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
16040 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
16041 sym
->name
, &sym
->declared_at
);
16045 if (e
->ref
== NULL
&& sym
->as
)
16047 gfc_error ("DATA array %qs at %L must be specified in a previous"
16048 " declaration", sym
->name
, where
);
16052 if (gfc_is_coindexed (e
))
16054 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
16059 has_pointer
= sym
->attr
.pointer
;
16061 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16063 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
16068 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
16070 gfc_error ("DATA element %qs at %L is a pointer and so must "
16071 "be a full array", sym
->name
, where
);
16075 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16077 gfc_error ("DATA object near %L has the pointer attribute "
16078 "and the corresponding DATA value is not a valid "
16079 "initial-data-target", where
);
16085 if (e
->rank
== 0 || has_pointer
)
16087 mpz_init_set_ui (size
, 1);
16094 /* Find the array section reference. */
16095 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16097 if (ref
->type
!= REF_ARRAY
)
16099 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16105 /* Set marks according to the reference pattern. */
16106 switch (ref
->u
.ar
.type
)
16114 /* Get the start position of array section. */
16115 gfc_get_section_index (ar
, section_index
, &offset
);
16120 gcc_unreachable ();
16123 if (!gfc_array_size (e
, &size
))
16125 gfc_error ("Nonconstant array section at %L in DATA statement",
16127 mpz_clear (offset
);
16134 while (mpz_cmp_ui (size
, 0) > 0)
16136 if (!next_data_value ())
16138 gfc_error ("DATA statement at %L has more variables than values",
16144 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16148 /* If we have more than one element left in the repeat count,
16149 and we have more than one element left in the target variable,
16150 then create a range assignment. */
16151 /* FIXME: Only done for full arrays for now, since array sections
16153 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16154 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16158 if (mpz_cmp (size
, values
.left
) >= 0)
16160 mpz_init_set (range
, values
.left
);
16161 mpz_sub (size
, size
, values
.left
);
16162 mpz_set_ui (values
.left
, 0);
16166 mpz_init_set (range
, size
);
16167 mpz_sub (values
.left
, values
.left
, size
);
16168 mpz_set_ui (size
, 0);
16171 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16174 mpz_add (offset
, offset
, range
);
16181 /* Assign initial value to symbol. */
16184 mpz_sub_ui (values
.left
, values
.left
, 1);
16185 mpz_sub_ui (size
, size
, 1);
16187 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16192 if (mark
== AR_FULL
)
16193 mpz_add_ui (offset
, offset
, 1);
16195 /* Modify the array section indexes and recalculate the offset
16196 for next element. */
16197 else if (mark
== AR_SECTION
)
16198 gfc_advance_section (section_index
, ar
, &offset
);
16202 if (mark
== AR_SECTION
)
16204 for (i
= 0; i
< ar
->dimen
; i
++)
16205 mpz_clear (section_index
[i
]);
16209 mpz_clear (offset
);
16215 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16217 /* Iterate over a list of elements in a DATA statement. */
16220 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16223 iterator_stack frame
;
16224 gfc_expr
*e
, *start
, *end
, *step
;
16225 bool retval
= true;
16227 mpz_init (frame
.value
);
16230 start
= gfc_copy_expr (var
->iter
.start
);
16231 end
= gfc_copy_expr (var
->iter
.end
);
16232 step
= gfc_copy_expr (var
->iter
.step
);
16234 if (!gfc_simplify_expr (start
, 1)
16235 || start
->expr_type
!= EXPR_CONSTANT
)
16237 gfc_error ("start of implied-do loop at %L could not be "
16238 "simplified to a constant value", &start
->where
);
16242 if (!gfc_simplify_expr (end
, 1)
16243 || end
->expr_type
!= EXPR_CONSTANT
)
16245 gfc_error ("end of implied-do loop at %L could not be "
16246 "simplified to a constant value", &start
->where
);
16250 if (!gfc_simplify_expr (step
, 1)
16251 || step
->expr_type
!= EXPR_CONSTANT
)
16253 gfc_error ("step of implied-do loop at %L could not be "
16254 "simplified to a constant value", &start
->where
);
16259 mpz_set (trip
, end
->value
.integer
);
16260 mpz_sub (trip
, trip
, start
->value
.integer
);
16261 mpz_add (trip
, trip
, step
->value
.integer
);
16263 mpz_div (trip
, trip
, step
->value
.integer
);
16265 mpz_set (frame
.value
, start
->value
.integer
);
16267 frame
.prev
= iter_stack
;
16268 frame
.variable
= var
->iter
.var
->symtree
;
16269 iter_stack
= &frame
;
16271 while (mpz_cmp_ui (trip
, 0) > 0)
16273 if (!traverse_data_var (var
->list
, where
))
16279 e
= gfc_copy_expr (var
->expr
);
16280 if (!gfc_simplify_expr (e
, 1))
16287 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16289 mpz_sub_ui (trip
, trip
, 1);
16293 mpz_clear (frame
.value
);
16296 gfc_free_expr (start
);
16297 gfc_free_expr (end
);
16298 gfc_free_expr (step
);
16300 iter_stack
= frame
.prev
;
16305 /* Type resolve variables in the variable list of a DATA statement. */
16308 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16312 for (; var
; var
= var
->next
)
16314 if (var
->expr
== NULL
)
16315 t
= traverse_data_list (var
, where
);
16317 t
= check_data_variable (var
, where
);
16327 /* Resolve the expressions and iterators associated with a data statement.
16328 This is separate from the assignment checking because data lists should
16329 only be resolved once. */
16332 resolve_data_variables (gfc_data_variable
*d
)
16334 for (; d
; d
= d
->next
)
16336 if (d
->list
== NULL
)
16338 if (!gfc_resolve_expr (d
->expr
))
16343 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16346 if (!resolve_data_variables (d
->list
))
16355 /* Resolve a single DATA statement. We implement this by storing a pointer to
16356 the value list into static variables, and then recursively traversing the
16357 variables list, expanding iterators and such. */
16360 resolve_data (gfc_data
*d
)
16363 if (!resolve_data_variables (d
->var
))
16366 values
.vnode
= d
->value
;
16367 if (d
->value
== NULL
)
16368 mpz_set_ui (values
.left
, 0);
16370 mpz_set (values
.left
, d
->value
->repeat
);
16372 if (!traverse_data_var (d
->var
, &d
->where
))
16375 /* At this point, we better not have any values left. */
16377 if (next_data_value ())
16378 gfc_error ("DATA statement at %L has more values than variables",
16383 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16384 accessed by host or use association, is a dummy argument to a pure function,
16385 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16386 is storage associated with any such variable, shall not be used in the
16387 following contexts: (clients of this function). */
16389 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16390 procedure. Returns zero if assignment is OK, nonzero if there is a
16393 gfc_impure_variable (gfc_symbol
*sym
)
16398 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16401 /* Check if the symbol's ns is inside the pure procedure. */
16402 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16406 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16410 proc
= sym
->ns
->proc_name
;
16411 if (sym
->attr
.dummy
16412 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16413 || proc
->attr
.function
))
16416 /* TODO: Sort out what can be storage associated, if anything, and include
16417 it here. In principle equivalences should be scanned but it does not
16418 seem to be possible to storage associate an impure variable this way. */
16423 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16424 current namespace is inside a pure procedure. */
16427 gfc_pure (gfc_symbol
*sym
)
16429 symbol_attribute attr
;
16434 /* Check if the current namespace or one of its parents
16435 belongs to a pure procedure. */
16436 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16438 sym
= ns
->proc_name
;
16442 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16450 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16454 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16455 checks if the current namespace is implicitly pure. Note that this
16456 function returns false for a PURE procedure. */
16459 gfc_implicit_pure (gfc_symbol
*sym
)
16465 /* Check if the current procedure is implicit_pure. Walk up
16466 the procedure list until we find a procedure. */
16467 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16469 sym
= ns
->proc_name
;
16473 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16478 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16479 && !sym
->attr
.pure
;
16484 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16490 /* Check if the current procedure is implicit_pure. Walk up
16491 the procedure list until we find a procedure. */
16492 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16494 sym
= ns
->proc_name
;
16498 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16503 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16504 sym
->attr
.implicit_pure
= 0;
16506 sym
->attr
.pure
= 0;
16510 /* Test whether the current procedure is elemental or not. */
16513 gfc_elemental (gfc_symbol
*sym
)
16515 symbol_attribute attr
;
16518 sym
= gfc_current_ns
->proc_name
;
16523 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16527 /* Warn about unused labels. */
16530 warn_unused_fortran_label (gfc_st_label
*label
)
16535 warn_unused_fortran_label (label
->left
);
16537 if (label
->defined
== ST_LABEL_UNKNOWN
)
16540 switch (label
->referenced
)
16542 case ST_LABEL_UNKNOWN
:
16543 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16544 label
->value
, &label
->where
);
16547 case ST_LABEL_BAD_TARGET
:
16548 gfc_warning (OPT_Wunused_label
,
16549 "Label %d at %L defined but cannot be used",
16550 label
->value
, &label
->where
);
16557 warn_unused_fortran_label (label
->right
);
16561 /* Returns the sequence type of a symbol or sequence. */
16564 sequence_type (gfc_typespec ts
)
16573 if (ts
.u
.derived
->components
== NULL
)
16574 return SEQ_NONDEFAULT
;
16576 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16577 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16578 if (sequence_type (c
->ts
) != result
)
16584 if (ts
.kind
!= gfc_default_character_kind
)
16585 return SEQ_NONDEFAULT
;
16587 return SEQ_CHARACTER
;
16590 if (ts
.kind
!= gfc_default_integer_kind
)
16591 return SEQ_NONDEFAULT
;
16593 return SEQ_NUMERIC
;
16596 if (!(ts
.kind
== gfc_default_real_kind
16597 || ts
.kind
== gfc_default_double_kind
))
16598 return SEQ_NONDEFAULT
;
16600 return SEQ_NUMERIC
;
16603 if (ts
.kind
!= gfc_default_complex_kind
)
16604 return SEQ_NONDEFAULT
;
16606 return SEQ_NUMERIC
;
16609 if (ts
.kind
!= gfc_default_logical_kind
)
16610 return SEQ_NONDEFAULT
;
16612 return SEQ_NUMERIC
;
16615 return SEQ_NONDEFAULT
;
16620 /* Resolve derived type EQUIVALENCE object. */
16623 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16625 gfc_component
*c
= derived
->components
;
16630 /* Shall not be an object of nonsequence derived type. */
16631 if (!derived
->attr
.sequence
)
16633 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16634 "attribute to be an EQUIVALENCE object", sym
->name
,
16639 /* Shall not have allocatable components. */
16640 if (derived
->attr
.alloc_comp
)
16642 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16643 "components to be an EQUIVALENCE object",sym
->name
,
16648 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16650 gfc_error ("Derived type variable %qs at %L with default "
16651 "initialization cannot be in EQUIVALENCE with a variable "
16652 "in COMMON", sym
->name
, &e
->where
);
16656 for (; c
; c
= c
->next
)
16658 if (gfc_bt_struct (c
->ts
.type
)
16659 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16662 /* Shall not be an object of sequence derived type containing a pointer
16663 in the structure. */
16664 if (c
->attr
.pointer
)
16666 gfc_error ("Derived type variable %qs at %L with pointer "
16667 "component(s) cannot be an EQUIVALENCE object",
16668 sym
->name
, &e
->where
);
16676 /* Resolve equivalence object.
16677 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16678 an allocatable array, an object of nonsequence derived type, an object of
16679 sequence derived type containing a pointer at any level of component
16680 selection, an automatic object, a function name, an entry name, a result
16681 name, a named constant, a structure component, or a subobject of any of
16682 the preceding objects. A substring shall not have length zero. A
16683 derived type shall not have components with default initialization nor
16684 shall two objects of an equivalence group be initialized.
16685 Either all or none of the objects shall have an protected attribute.
16686 The simple constraints are done in symbol.c(check_conflict) and the rest
16687 are implemented here. */
16690 resolve_equivalence (gfc_equiv
*eq
)
16693 gfc_symbol
*first_sym
;
16696 locus
*last_where
= NULL
;
16697 seq_type eq_type
, last_eq_type
;
16698 gfc_typespec
*last_ts
;
16699 int object
, cnt_protected
;
16702 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16704 first_sym
= eq
->expr
->symtree
->n
.sym
;
16708 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16712 e
->ts
= e
->symtree
->n
.sym
->ts
;
16713 /* match_varspec might not know yet if it is seeing
16714 array reference or substring reference, as it doesn't
16716 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16718 gfc_ref
*ref
= e
->ref
;
16719 sym
= e
->symtree
->n
.sym
;
16721 if (sym
->attr
.dimension
)
16723 ref
->u
.ar
.as
= sym
->as
;
16727 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16728 if (e
->ts
.type
== BT_CHARACTER
16730 && ref
->type
== REF_ARRAY
16731 && ref
->u
.ar
.dimen
== 1
16732 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16733 && ref
->u
.ar
.stride
[0] == NULL
)
16735 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16736 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16739 /* Optimize away the (:) reference. */
16740 if (start
== NULL
&& end
== NULL
)
16743 e
->ref
= ref
->next
;
16745 e
->ref
->next
= ref
->next
;
16750 ref
->type
= REF_SUBSTRING
;
16752 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16754 ref
->u
.ss
.start
= start
;
16755 if (end
== NULL
&& e
->ts
.u
.cl
)
16756 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16757 ref
->u
.ss
.end
= end
;
16758 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16765 /* Any further ref is an error. */
16768 gcc_assert (ref
->type
== REF_ARRAY
);
16769 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16775 if (!gfc_resolve_expr (e
))
16778 sym
= e
->symtree
->n
.sym
;
16780 if (sym
->attr
.is_protected
)
16782 if (cnt_protected
> 0 && cnt_protected
!= object
)
16784 gfc_error ("Either all or none of the objects in the "
16785 "EQUIVALENCE set at %L shall have the "
16786 "PROTECTED attribute",
16791 /* Shall not equivalence common block variables in a PURE procedure. */
16792 if (sym
->ns
->proc_name
16793 && sym
->ns
->proc_name
->attr
.pure
16794 && sym
->attr
.in_common
)
16796 /* Need to check for symbols that may have entered the pure
16797 procedure via a USE statement. */
16798 bool saw_sym
= false;
16799 if (sym
->ns
->use_stmts
)
16802 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16803 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16809 gfc_error ("COMMON block member %qs at %L cannot be an "
16810 "EQUIVALENCE object in the pure procedure %qs",
16811 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16815 /* Shall not be a named constant. */
16816 if (e
->expr_type
== EXPR_CONSTANT
)
16818 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16819 "object", sym
->name
, &e
->where
);
16823 if (e
->ts
.type
== BT_DERIVED
16824 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16827 /* Check that the types correspond correctly:
16829 A numeric sequence structure may be equivalenced to another sequence
16830 structure, an object of default integer type, default real type, double
16831 precision real type, default logical type such that components of the
16832 structure ultimately only become associated to objects of the same
16833 kind. A character sequence structure may be equivalenced to an object
16834 of default character kind or another character sequence structure.
16835 Other objects may be equivalenced only to objects of the same type and
16836 kind parameters. */
16838 /* Identical types are unconditionally OK. */
16839 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16840 goto identical_types
;
16842 last_eq_type
= sequence_type (*last_ts
);
16843 eq_type
= sequence_type (sym
->ts
);
16845 /* Since the pair of objects is not of the same type, mixed or
16846 non-default sequences can be rejected. */
16848 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16849 "statement at %L with different type objects";
16851 && last_eq_type
== SEQ_MIXED
16852 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16853 || (eq_type
== SEQ_MIXED
16854 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16857 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16858 "statement at %L with objects of different type";
16860 && last_eq_type
== SEQ_NONDEFAULT
16861 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16862 || (eq_type
== SEQ_NONDEFAULT
16863 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16866 msg
="Non-CHARACTER object %qs in default CHARACTER "
16867 "EQUIVALENCE statement at %L";
16868 if (last_eq_type
== SEQ_CHARACTER
16869 && eq_type
!= SEQ_CHARACTER
16870 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16873 msg
="Non-NUMERIC object %qs in default NUMERIC "
16874 "EQUIVALENCE statement at %L";
16875 if (last_eq_type
== SEQ_NUMERIC
16876 && eq_type
!= SEQ_NUMERIC
16877 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16883 last_where
= &e
->where
;
16888 /* Shall not be an automatic array. */
16889 if (e
->ref
->type
== REF_ARRAY
&& is_non_constant_shape_array (sym
))
16891 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16892 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16899 /* Shall not be a structure component. */
16900 if (r
->type
== REF_COMPONENT
)
16902 gfc_error ("Structure component %qs at %L cannot be an "
16903 "EQUIVALENCE object",
16904 r
->u
.c
.component
->name
, &e
->where
);
16908 /* A substring shall not have length zero. */
16909 if (r
->type
== REF_SUBSTRING
)
16911 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16913 gfc_error ("Substring at %L has length zero",
16914 &r
->u
.ss
.start
->where
);
16924 /* Function called by resolve_fntype to flag other symbols used in the
16925 length type parameter specification of function results. */
16928 flag_fn_result_spec (gfc_expr
*expr
,
16930 int *f ATTRIBUTE_UNUSED
)
16935 if (expr
->expr_type
== EXPR_VARIABLE
)
16937 s
= expr
->symtree
->n
.sym
;
16938 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16944 gfc_error ("Self reference in character length expression "
16945 "for %qs at %L", sym
->name
, &expr
->where
);
16949 if (!s
->fn_result_spec
16950 && s
->attr
.flavor
== FL_PARAMETER
)
16952 /* Function contained in a module.... */
16953 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16956 s
->fn_result_spec
= 1;
16957 /* Make sure that this symbol is translated as a module
16959 st
= gfc_get_unique_symtree (ns
);
16963 /* ... which is use associated and called. */
16964 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16966 /* External function matched with an interface. */
16969 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16970 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16971 && s
->ns
->proc_name
->attr
.function
))
16972 s
->fn_result_spec
= 1;
16979 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16982 resolve_fntype (gfc_namespace
*ns
)
16984 gfc_entry_list
*el
;
16987 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16990 /* If there are any entries, ns->proc_name is the entry master
16991 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16993 sym
= ns
->entries
->sym
;
16995 sym
= ns
->proc_name
;
16996 if (sym
->result
== sym
16997 && sym
->ts
.type
== BT_UNKNOWN
16998 && !gfc_set_default_type (sym
, 0, NULL
)
16999 && !sym
->attr
.untyped
)
17001 gfc_error ("Function %qs at %L has no IMPLICIT type",
17002 sym
->name
, &sym
->declared_at
);
17003 sym
->attr
.untyped
= 1;
17006 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
17007 && !sym
->attr
.contained
17008 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
17009 && gfc_check_symbol_access (sym
))
17011 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
17012 "%L of PRIVATE type %qs", sym
->name
,
17013 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
17017 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
17019 if (el
->sym
->result
== el
->sym
17020 && el
->sym
->ts
.type
== BT_UNKNOWN
17021 && !gfc_set_default_type (el
->sym
, 0, NULL
)
17022 && !el
->sym
->attr
.untyped
)
17024 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
17025 el
->sym
->name
, &el
->sym
->declared_at
);
17026 el
->sym
->attr
.untyped
= 1;
17030 if (sym
->ts
.type
== BT_CHARACTER
)
17031 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
17035 /* 12.3.2.1.1 Defined operators. */
17038 check_uop_procedure (gfc_symbol
*sym
, locus where
)
17040 gfc_formal_arglist
*formal
;
17042 if (!sym
->attr
.function
)
17044 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
17045 sym
->name
, &where
);
17049 if (sym
->ts
.type
== BT_CHARACTER
17050 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
17051 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
17052 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
17054 gfc_error ("User operator procedure %qs at %L cannot be assumed "
17055 "character length", sym
->name
, &where
);
17059 formal
= gfc_sym_get_dummy_args (sym
);
17060 if (!formal
|| !formal
->sym
)
17062 gfc_error ("User operator procedure %qs at %L must have at least "
17063 "one argument", sym
->name
, &where
);
17067 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17069 gfc_error ("First argument of operator interface at %L must be "
17070 "INTENT(IN)", &where
);
17074 if (formal
->sym
->attr
.optional
)
17076 gfc_error ("First argument of operator interface at %L cannot be "
17077 "optional", &where
);
17081 formal
= formal
->next
;
17082 if (!formal
|| !formal
->sym
)
17085 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17087 gfc_error ("Second argument of operator interface at %L must be "
17088 "INTENT(IN)", &where
);
17092 if (formal
->sym
->attr
.optional
)
17094 gfc_error ("Second argument of operator interface at %L cannot be "
17095 "optional", &where
);
17101 gfc_error ("Operator interface at %L must have, at most, two "
17102 "arguments", &where
);
17110 gfc_resolve_uops (gfc_symtree
*symtree
)
17112 gfc_interface
*itr
;
17114 if (symtree
== NULL
)
17117 gfc_resolve_uops (symtree
->left
);
17118 gfc_resolve_uops (symtree
->right
);
17120 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17121 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17125 /* Examine all of the expressions associated with a program unit,
17126 assign types to all intermediate expressions, make sure that all
17127 assignments are to compatible types and figure out which names
17128 refer to which functions or subroutines. It doesn't check code
17129 block, which is handled by gfc_resolve_code. */
17132 resolve_types (gfc_namespace
*ns
)
17138 gfc_namespace
* old_ns
= gfc_current_ns
;
17139 bool recursive
= ns
->proc_name
&& ns
->proc_name
->attr
.recursive
;
17141 if (ns
->types_resolved
)
17144 /* Check that all IMPLICIT types are ok. */
17145 if (!ns
->seen_implicit_none
)
17148 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17149 if (ns
->set_flag
[letter
]
17150 && !resolve_typespec_used (&ns
->default_type
[letter
],
17151 &ns
->implicit_loc
[letter
], NULL
))
17155 gfc_current_ns
= ns
;
17157 resolve_entries (ns
);
17159 resolve_common_vars (&ns
->blank_common
, false);
17160 resolve_common_blocks (ns
->common_root
);
17162 resolve_contained_functions (ns
);
17164 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17165 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17166 gfc_resolve_formal_arglist (ns
->proc_name
);
17168 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17170 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17171 resolve_charlen (cl
);
17173 gfc_traverse_ns (ns
, resolve_symbol
);
17175 resolve_fntype (ns
);
17177 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17179 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17180 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17181 "also be PURE", n
->proc_name
->name
,
17182 &n
->proc_name
->declared_at
);
17188 gfc_do_concurrent_flag
= 0;
17189 gfc_check_interfaces (ns
);
17191 gfc_traverse_ns (ns
, resolve_values
);
17193 if (ns
->save_all
|| (!flag_automatic
&& !recursive
))
17197 for (d
= ns
->data
; d
; d
= d
->next
)
17201 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17203 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17205 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17206 resolve_equivalence (eq
);
17208 /* Warn about unused labels. */
17209 if (warn_unused_label
)
17210 warn_unused_fortran_label (ns
->st_labels
);
17212 gfc_resolve_uops (ns
->uop_root
);
17214 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17216 gfc_resolve_omp_declare_simd (ns
);
17218 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17220 ns
->types_resolved
= 1;
17222 gfc_current_ns
= old_ns
;
17226 /* Call gfc_resolve_code recursively. */
17229 resolve_codes (gfc_namespace
*ns
)
17232 bitmap_obstack old_obstack
;
17234 if (ns
->resolved
== 1)
17237 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17240 gfc_current_ns
= ns
;
17242 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17243 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17246 /* Set to an out of range value. */
17247 current_entry_id
= -1;
17249 old_obstack
= labels_obstack
;
17250 bitmap_obstack_initialize (&labels_obstack
);
17252 gfc_resolve_oacc_declare (ns
);
17253 gfc_resolve_oacc_routines (ns
);
17254 gfc_resolve_omp_local_vars (ns
);
17255 gfc_resolve_code (ns
->code
, ns
);
17257 bitmap_obstack_release (&labels_obstack
);
17258 labels_obstack
= old_obstack
;
17262 /* This function is called after a complete program unit has been compiled.
17263 Its purpose is to examine all of the expressions associated with a program
17264 unit, assign types to all intermediate expressions, make sure that all
17265 assignments are to compatible types and figure out which names refer to
17266 which functions or subroutines. */
17269 gfc_resolve (gfc_namespace
*ns
)
17271 gfc_namespace
*old_ns
;
17272 code_stack
*old_cs_base
;
17273 struct gfc_omp_saved_state old_omp_state
;
17279 old_ns
= gfc_current_ns
;
17280 old_cs_base
= cs_base
;
17282 /* As gfc_resolve can be called during resolution of an OpenMP construct
17283 body, we should clear any state associated to it, so that say NS's
17284 DO loops are not interpreted as OpenMP loops. */
17285 if (!ns
->construct_entities
)
17286 gfc_omp_save_and_clear_state (&old_omp_state
);
17288 resolve_types (ns
);
17289 component_assignment_level
= 0;
17290 resolve_codes (ns
);
17292 gfc_current_ns
= old_ns
;
17293 cs_base
= old_cs_base
;
17296 gfc_run_passes (ns
);
17298 if (!ns
->construct_entities
)
17299 gfc_omp_restore_state (&old_omp_state
);