1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2020 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
589 /* Try to find out of what the return type is. */
590 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
592 t
= gfc_set_default_type (sym
->result
, 0, ns
);
594 if (!t
&& !sym
->result
->attr
.untyped
)
596 if (sym
->result
== sym
)
597 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
598 sym
->name
, &sym
->declared_at
);
599 else if (!sym
->result
->attr
.proc_pointer
)
600 gfc_error ("Result %qs of contained function %qs at %L has "
601 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
602 &sym
->result
->declared_at
);
603 sym
->result
->attr
.untyped
= 1;
607 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
608 type, lists the only ways a character length value of * can be used:
609 dummy arguments of procedures, named constants, function results and
610 in allocate statements if the allocate_object is an assumed length dummy
611 in external functions. Internal function results and results of module
612 procedures are not on this list, ergo, not permitted. */
614 if (sym
->result
->ts
.type
== BT_CHARACTER
)
616 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
617 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
619 /* See if this is a module-procedure and adapt error message
622 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
623 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
625 gfc_error (module_proc
626 ? G_("Character-valued module procedure %qs at %L"
627 " must not be assumed length")
628 : G_("Character-valued internal function %qs at %L"
629 " must not be assumed length"),
630 sym
->name
, &sym
->declared_at
);
636 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
637 introduce duplicates. */
640 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
642 gfc_formal_arglist
*f
, *new_arglist
;
645 for (; new_args
!= NULL
; new_args
= new_args
->next
)
647 new_sym
= new_args
->sym
;
648 /* See if this arg is already in the formal argument list. */
649 for (f
= proc
->formal
; f
; f
= f
->next
)
651 if (new_sym
== f
->sym
)
658 /* Add a new argument. Argument order is not important. */
659 new_arglist
= gfc_get_formal_arglist ();
660 new_arglist
->sym
= new_sym
;
661 new_arglist
->next
= proc
->formal
;
662 proc
->formal
= new_arglist
;
667 /* Flag the arguments that are not present in all entries. */
670 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
672 gfc_formal_arglist
*f
, *head
;
675 for (f
= proc
->formal
; f
; f
= f
->next
)
680 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
682 if (new_args
->sym
== f
->sym
)
689 f
->sym
->attr
.not_always_present
= 1;
694 /* Resolve alternate entry points. If a symbol has multiple entry points we
695 create a new master symbol for the main routine, and turn the existing
696 symbol into an entry point. */
699 resolve_entries (gfc_namespace
*ns
)
701 gfc_namespace
*old_ns
;
705 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
706 static int master_count
= 0;
708 if (ns
->proc_name
== NULL
)
711 /* No need to do anything if this procedure doesn't have alternate entry
716 /* We may already have resolved alternate entry points. */
717 if (ns
->proc_name
->attr
.entry_master
)
720 /* If this isn't a procedure something has gone horribly wrong. */
721 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
723 /* Remember the current namespace. */
724 old_ns
= gfc_current_ns
;
728 /* Add the main entry point to the list of entry points. */
729 el
= gfc_get_entry_list ();
730 el
->sym
= ns
->proc_name
;
732 el
->next
= ns
->entries
;
734 ns
->proc_name
->attr
.entry
= 1;
736 /* If it is a module function, it needs to be in the right namespace
737 so that gfc_get_fake_result_decl can gather up the results. The
738 need for this arose in get_proc_name, where these beasts were
739 left in their own namespace, to keep prior references linked to
740 the entry declaration.*/
741 if (ns
->proc_name
->attr
.function
742 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
745 /* Do the same for entries where the master is not a module
746 procedure. These are retained in the module namespace because
747 of the module procedure declaration. */
748 for (el
= el
->next
; el
; el
= el
->next
)
749 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
750 && el
->sym
->attr
.mod_proc
)
754 /* Add an entry statement for it. */
755 c
= gfc_get_code (EXEC_ENTRY
);
760 /* Create a new symbol for the master function. */
761 /* Give the internal function a unique name (within this file).
762 Also include the function name so the user has some hope of figuring
763 out what is going on. */
764 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
765 master_count
++, ns
->proc_name
->name
);
766 gfc_get_ha_symbol (name
, &proc
);
767 gcc_assert (proc
!= NULL
);
769 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
770 if (ns
->proc_name
->attr
.subroutine
)
771 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
775 gfc_typespec
*ts
, *fts
;
776 gfc_array_spec
*as
, *fas
;
777 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
779 fas
= ns
->entries
->sym
->as
;
780 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
781 fts
= &ns
->entries
->sym
->result
->ts
;
782 if (fts
->type
== BT_UNKNOWN
)
783 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
784 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
786 ts
= &el
->sym
->result
->ts
;
788 as
= as
? as
: el
->sym
->result
->as
;
789 if (ts
->type
== BT_UNKNOWN
)
790 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
792 if (! gfc_compare_types (ts
, fts
)
793 || (el
->sym
->result
->attr
.dimension
794 != ns
->entries
->sym
->result
->attr
.dimension
)
795 || (el
->sym
->result
->attr
.pointer
796 != ns
->entries
->sym
->result
->attr
.pointer
))
798 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
799 && gfc_compare_array_spec (as
, fas
) == 0)
800 gfc_error ("Function %s at %L has entries with mismatched "
801 "array specifications", ns
->entries
->sym
->name
,
802 &ns
->entries
->sym
->declared_at
);
803 /* The characteristics need to match and thus both need to have
804 the same string length, i.e. both len=*, or both len=4.
805 Having both len=<variable> is also possible, but difficult to
806 check at compile time. */
807 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
808 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
809 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
811 && ts
->u
.cl
->length
->expr_type
812 != fts
->u
.cl
->length
->expr_type
)
814 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
815 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
816 fts
->u
.cl
->length
->value
.integer
) != 0)))
817 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
818 "entries returning variables of different "
819 "string lengths", ns
->entries
->sym
->name
,
820 &ns
->entries
->sym
->declared_at
);
825 sym
= ns
->entries
->sym
->result
;
826 /* All result types the same. */
828 if (sym
->attr
.dimension
)
829 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
830 if (sym
->attr
.pointer
)
831 gfc_add_pointer (&proc
->attr
, NULL
);
835 /* Otherwise the result will be passed through a union by
837 proc
->attr
.mixed_entry_master
= 1;
838 for (el
= ns
->entries
; el
; el
= el
->next
)
840 sym
= el
->sym
->result
;
841 if (sym
->attr
.dimension
)
843 if (el
== ns
->entries
)
844 gfc_error ("FUNCTION result %s cannot be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 gfc_error ("ENTRY result %s cannot be an array in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 else if (sym
->attr
.pointer
)
854 if (el
== ns
->entries
)
855 gfc_error ("FUNCTION result %s cannot be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 gfc_error ("ENTRY result %s cannot be a POINTER in "
860 "FUNCTION %s at %L", sym
->name
,
861 ns
->entries
->sym
->name
, &sym
->declared_at
);
866 if (ts
->type
== BT_UNKNOWN
)
867 ts
= gfc_get_default_type (sym
->name
, NULL
);
871 if (ts
->kind
== gfc_default_integer_kind
)
875 if (ts
->kind
== gfc_default_real_kind
876 || ts
->kind
== gfc_default_double_kind
)
880 if (ts
->kind
== gfc_default_complex_kind
)
884 if (ts
->kind
== gfc_default_logical_kind
)
888 /* We will issue error elsewhere. */
896 if (el
== ns
->entries
)
897 gfc_error ("FUNCTION result %s cannot be of type %s "
898 "in FUNCTION %s at %L", sym
->name
,
899 gfc_typename (ts
), ns
->entries
->sym
->name
,
902 gfc_error ("ENTRY result %s cannot be of type %s "
903 "in FUNCTION %s at %L", sym
->name
,
904 gfc_typename (ts
), ns
->entries
->sym
->name
,
911 proc
->attr
.access
= ACCESS_PRIVATE
;
912 proc
->attr
.entry_master
= 1;
914 /* Merge all the entry point arguments. */
915 for (el
= ns
->entries
; el
; el
= el
->next
)
916 merge_argument_lists (proc
, el
->sym
->formal
);
918 /* Check the master formal arguments for any that are not
919 present in all entry points. */
920 for (el
= ns
->entries
; el
; el
= el
->next
)
921 check_argument_lists (proc
, el
->sym
->formal
);
923 /* Use the master function for the function body. */
924 ns
->proc_name
= proc
;
926 /* Finalize the new symbols. */
927 gfc_commit_symbols ();
929 /* Restore the original namespace. */
930 gfc_current_ns
= old_ns
;
934 /* Resolve common variables. */
936 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
938 gfc_symbol
*csym
= common_block
->head
;
940 for (; csym
; csym
= csym
->common_next
)
942 /* gfc_add_in_common may have been called before, but the reported errors
943 have been ignored to continue parsing.
944 We do the checks again here. */
945 if (!csym
->attr
.use_assoc
)
947 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
948 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
949 &common_block
->where
);
952 if (csym
->value
|| csym
->attr
.data
)
954 if (!csym
->ns
->is_block_data
)
955 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
956 "but only in BLOCK DATA initialization is "
957 "allowed", csym
->name
, &csym
->declared_at
);
958 else if (!named_common
)
959 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
960 "in a blank COMMON but initialization is only "
961 "allowed in named common blocks", csym
->name
,
965 if (UNLIMITED_POLY (csym
))
966 gfc_error_now ("%qs in cannot appear in COMMON at %L "
967 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.type
!= BT_DERIVED
)
972 if (!(csym
->ts
.u
.derived
->attr
.sequence
973 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "has neither the SEQUENCE nor the BIND(C) "
976 "attribute", csym
->name
, &csym
->declared_at
);
977 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
978 gfc_error_now ("Derived type variable %qs in COMMON at %L "
979 "has an ultimate component that is "
980 "allocatable", csym
->name
, &csym
->declared_at
);
981 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
982 gfc_error_now ("Derived type variable %qs in COMMON at %L "
983 "may not have default initializer", csym
->name
,
986 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
987 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
991 /* Resolve common blocks. */
993 resolve_common_blocks (gfc_symtree
*common_root
)
998 if (common_root
== NULL
)
1001 if (common_root
->left
)
1002 resolve_common_blocks (common_root
->left
);
1003 if (common_root
->right
)
1004 resolve_common_blocks (common_root
->right
);
1006 resolve_common_vars (common_root
->n
.common
, true);
1008 /* The common name is a global name - in Fortran 2003 also if it has a
1009 C binding name, since Fortran 2008 only the C binding name is a global
1011 if (!common_root
->n
.common
->binding_label
1012 || gfc_notification_std (GFC_STD_F2008
))
1014 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1015 common_root
->n
.common
->name
);
1017 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1018 && gsym
->type
== GSYM_COMMON
1019 && ((common_root
->n
.common
->binding_label
1020 && (!gsym
->binding_label
1021 || strcmp (common_root
->n
.common
->binding_label
,
1022 gsym
->binding_label
) != 0))
1023 || (!common_root
->n
.common
->binding_label
1024 && gsym
->binding_label
)))
1026 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1027 "identifier and must thus have the same binding name "
1028 "as the same-named COMMON block at %L: %s vs %s",
1029 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1031 common_root
->n
.common
->binding_label
1032 ? common_root
->n
.common
->binding_label
: "(blank)",
1033 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1037 if (gsym
&& gsym
->type
!= GSYM_COMMON
1038 && !common_root
->n
.common
->binding_label
)
1040 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1042 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1046 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1048 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1049 "%L sharing the identifier with global non-COMMON-block "
1050 "entity at %L", common_root
->n
.common
->name
,
1051 &common_root
->n
.common
->where
, &gsym
->where
);
1056 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
, false);
1057 gsym
->type
= GSYM_COMMON
;
1058 gsym
->where
= common_root
->n
.common
->where
;
1064 if (common_root
->n
.common
->binding_label
)
1066 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1067 common_root
->n
.common
->binding_label
);
1068 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1070 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1071 "global identifier as entity at %L",
1072 &common_root
->n
.common
->where
,
1073 common_root
->n
.common
->binding_label
, &gsym
->where
);
1078 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
, true);
1079 gsym
->type
= GSYM_COMMON
;
1080 gsym
->where
= common_root
->n
.common
->where
;
1086 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1090 if (sym
->attr
.flavor
== FL_PARAMETER
)
1091 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1092 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1094 if (sym
->attr
.external
)
1095 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1096 sym
->name
, &common_root
->n
.common
->where
);
1098 if (sym
->attr
.intrinsic
)
1099 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1100 sym
->name
, &common_root
->n
.common
->where
);
1101 else if (sym
->attr
.result
1102 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1103 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1104 "that is also a function result", sym
->name
,
1105 &common_root
->n
.common
->where
);
1106 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1107 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1108 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1109 "that is also a global procedure", sym
->name
,
1110 &common_root
->n
.common
->where
);
1114 /* Resolve contained function types. Because contained functions can call one
1115 another, they have to be worked out before any of the contained procedures
1118 The good news is that if a function doesn't already have a type, the only
1119 way it can get one is through an IMPLICIT type or a RESULT variable, because
1120 by definition contained functions are contained namespace they're contained
1121 in, not in a sibling or parent namespace. */
1124 resolve_contained_functions (gfc_namespace
*ns
)
1126 gfc_namespace
*child
;
1129 resolve_formal_arglists (ns
);
1131 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1133 /* Resolve alternate entry points first. */
1134 resolve_entries (child
);
1136 /* Then check function return types. */
1137 resolve_contained_fntype (child
->proc_name
, child
);
1138 for (el
= child
->entries
; el
; el
= el
->next
)
1139 resolve_contained_fntype (el
->sym
, child
);
1145 /* A Parameterized Derived Type constructor must contain values for
1146 the PDT KIND parameters or they must have a default initializer.
1147 Go through the constructor picking out the KIND expressions,
1148 storing them in 'param_list' and then call gfc_get_pdt_instance
1149 to obtain the PDT instance. */
1151 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1154 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1156 param
= gfc_get_actual_arglist ();
1158 param_list
= param_tail
= param
;
1161 param_tail
->next
= param
;
1162 param_tail
= param_tail
->next
;
1165 param_tail
->name
= c
->name
;
1167 param_tail
->expr
= gfc_copy_expr (expr
);
1168 else if (c
->initializer
)
1169 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1172 param_tail
->spec_type
= SPEC_ASSUMED
;
1173 if (c
->attr
.pdt_kind
)
1175 gfc_error ("The KIND parameter %qs in the PDT constructor "
1176 "at %C has no value", param
->name
);
1185 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1186 gfc_symbol
*derived
)
1188 gfc_constructor
*cons
= NULL
;
1189 gfc_component
*comp
;
1192 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1193 cons
= gfc_constructor_first (expr
->value
.constructor
);
1198 comp
= derived
->components
;
1200 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1203 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1204 && comp
->ts
.type
== BT_DERIVED
)
1206 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1210 else if (comp
->ts
.type
== BT_DERIVED
)
1212 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1216 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1217 && derived
->attr
.pdt_template
)
1219 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1228 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1229 static bool resolve_fl_struct (gfc_symbol
*sym
);
1232 /* Resolve all of the elements of a structure constructor and make sure that
1233 the types are correct. The 'init' flag indicates that the given
1234 constructor is an initializer. */
1237 resolve_structure_cons (gfc_expr
*expr
, int init
)
1239 gfc_constructor
*cons
;
1240 gfc_component
*comp
;
1246 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1248 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1249 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1251 resolve_fl_struct (expr
->ts
.u
.derived
);
1253 /* If this is a Parameterized Derived Type template, find the
1254 instance corresponding to the PDT kind parameters. */
1255 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1258 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1261 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1263 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1266 gfc_free_actual_arglist (param_list
);
1268 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1273 cons
= gfc_constructor_first (expr
->value
.constructor
);
1275 /* A constructor may have references if it is the result of substituting a
1276 parameter variable. In this case we just pull out the component we
1279 comp
= expr
->ref
->u
.c
.sym
->components
;
1281 comp
= expr
->ts
.u
.derived
->components
;
1283 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1290 /* Unions use an EXPR_NULL contrived expression to tell the translation
1291 phase to generate an initializer of the appropriate length.
1293 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1296 if (!gfc_resolve_expr (cons
->expr
))
1302 rank
= comp
->as
? comp
->as
->rank
: 0;
1303 if (comp
->ts
.type
== BT_CLASS
1304 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1305 && CLASS_DATA (comp
)->as
)
1306 rank
= CLASS_DATA (comp
)->as
->rank
;
1308 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1309 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1311 gfc_error ("The rank of the element in the structure "
1312 "constructor at %L does not match that of the "
1313 "component (%d/%d)", &cons
->expr
->where
,
1314 cons
->expr
->rank
, rank
);
1318 /* If we don't have the right type, try to convert it. */
1320 if (!comp
->attr
.proc_pointer
&&
1321 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1323 if (strcmp (comp
->name
, "_extends") == 0)
1325 /* Can afford to be brutal with the _extends initializer.
1326 The derived type can get lost because it is PRIVATE
1327 but it is not usage constrained by the standard. */
1328 cons
->expr
->ts
= comp
->ts
;
1330 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs, is %s but should be %s",
1334 &cons
->expr
->where
, comp
->name
,
1335 gfc_basic_typename (cons
->expr
->ts
.type
),
1336 gfc_basic_typename (comp
->ts
.type
));
1341 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1347 /* For strings, the length of the constructor should be the same as
1348 the one of the structure, ensure this if the lengths are known at
1349 compile time and when we are dealing with PARAMETER or structure
1351 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1352 && comp
->ts
.u
.cl
->length
1353 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1354 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1355 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1356 && cons
->expr
->rank
!= 0
1357 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1358 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1360 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1361 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1363 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1364 to make use of the gfc_resolve_character_array_constructor
1365 machinery. The expression is later simplified away to
1366 an array of string literals. */
1367 gfc_expr
*para
= cons
->expr
;
1368 cons
->expr
= gfc_get_expr ();
1369 cons
->expr
->ts
= para
->ts
;
1370 cons
->expr
->where
= para
->where
;
1371 cons
->expr
->expr_type
= EXPR_ARRAY
;
1372 cons
->expr
->rank
= para
->rank
;
1373 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1374 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1375 para
, &cons
->expr
->where
);
1378 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1380 /* Rely on the cleanup of the namespace to deal correctly with
1381 the old charlen. (There was a block here that attempted to
1382 remove the charlen but broke the chain in so doing.) */
1383 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1384 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1385 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1386 gfc_resolve_character_array_constructor (cons
->expr
);
1390 if (cons
->expr
->expr_type
== EXPR_NULL
1391 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1392 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1393 || (comp
->ts
.type
== BT_CLASS
1394 && (CLASS_DATA (comp
)->attr
.class_pointer
1395 || CLASS_DATA (comp
)->attr
.allocatable
))))
1398 gfc_error ("The NULL in the structure constructor at %L is "
1399 "being applied to component %qs, which is neither "
1400 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1404 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1406 /* Check procedure pointer interface. */
1407 gfc_symbol
*s2
= NULL
;
1412 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1415 s2
= c2
->ts
.interface
;
1418 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1420 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1421 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1423 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1425 s2
= cons
->expr
->symtree
->n
.sym
;
1426 name
= cons
->expr
->symtree
->n
.sym
->name
;
1429 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1430 err
, sizeof (err
), NULL
, NULL
))
1432 gfc_error_opt (0, "Interface mismatch for procedure-pointer "
1433 "component %qs in structure constructor at %L:"
1434 " %s", comp
->name
, &cons
->expr
->where
, err
);
1439 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1440 || cons
->expr
->expr_type
== EXPR_NULL
)
1443 a
= gfc_expr_attr (cons
->expr
);
1445 if (!a
.pointer
&& !a
.target
)
1448 gfc_error ("The element in the structure constructor at %L, "
1449 "for pointer component %qs should be a POINTER or "
1450 "a TARGET", &cons
->expr
->where
, comp
->name
);
1455 /* F08:C461. Additional checks for pointer initialization. */
1459 gfc_error ("Pointer initialization target at %L "
1460 "must not be ALLOCATABLE", &cons
->expr
->where
);
1465 gfc_error ("Pointer initialization target at %L "
1466 "must have the SAVE attribute", &cons
->expr
->where
);
1470 /* F2003, C1272 (3). */
1471 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1472 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1473 || gfc_is_coindexed (cons
->expr
));
1474 if (impure
&& gfc_pure (NULL
))
1477 gfc_error ("Invalid expression in the structure constructor for "
1478 "pointer component %qs at %L in PURE procedure",
1479 comp
->name
, &cons
->expr
->where
);
1483 gfc_unset_implicit_pure (NULL
);
1490 /****************** Expression name resolution ******************/
1492 /* Returns 0 if a symbol was not declared with a type or
1493 attribute declaration statement, nonzero otherwise. */
1496 was_declared (gfc_symbol
*sym
)
1502 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1505 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1506 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1507 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1508 || a
.asynchronous
|| a
.codimension
)
1515 /* Determine if a symbol is generic or not. */
1518 generic_sym (gfc_symbol
*sym
)
1522 if (sym
->attr
.generic
||
1523 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1526 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1529 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1536 return generic_sym (s
);
1543 /* Determine if a symbol is specific or not. */
1546 specific_sym (gfc_symbol
*sym
)
1550 if (sym
->attr
.if_source
== IFSRC_IFBODY
1551 || sym
->attr
.proc
== PROC_MODULE
1552 || sym
->attr
.proc
== PROC_INTERNAL
1553 || sym
->attr
.proc
== PROC_ST_FUNCTION
1554 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1555 || sym
->attr
.external
)
1558 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1561 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1563 return (s
== NULL
) ? 0 : specific_sym (s
);
1567 /* Figure out if the procedure is specific, generic or unknown. */
1570 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1573 procedure_kind (gfc_symbol
*sym
)
1575 if (generic_sym (sym
))
1576 return PTYPE_GENERIC
;
1578 if (specific_sym (sym
))
1579 return PTYPE_SPECIFIC
;
1581 return PTYPE_UNKNOWN
;
1584 /* Check references to assumed size arrays. The flag need_full_assumed_size
1585 is nonzero when matching actual arguments. */
1587 static int need_full_assumed_size
= 0;
1590 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1592 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1595 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1596 What should it be? */
1597 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1598 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1599 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1601 gfc_error ("The upper bound in the last dimension must "
1602 "appear in the reference to the assumed size "
1603 "array %qs at %L", sym
->name
, &e
->where
);
1610 /* Look for bad assumed size array references in argument expressions
1611 of elemental and array valued intrinsic procedures. Since this is
1612 called from procedure resolution functions, it only recurses at
1616 resolve_assumed_size_actual (gfc_expr
*e
)
1621 switch (e
->expr_type
)
1624 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1629 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1630 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1641 /* Check a generic procedure, passed as an actual argument, to see if
1642 there is a matching specific name. If none, it is an error, and if
1643 more than one, the reference is ambiguous. */
1645 count_specific_procs (gfc_expr
*e
)
1652 sym
= e
->symtree
->n
.sym
;
1654 for (p
= sym
->generic
; p
; p
= p
->next
)
1655 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1657 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1663 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1667 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1668 "argument at %L", sym
->name
, &e
->where
);
1674 /* See if a call to sym could possibly be a not allowed RECURSION because of
1675 a missing RECURSIVE declaration. This means that either sym is the current
1676 context itself, or sym is the parent of a contained procedure calling its
1677 non-RECURSIVE containing procedure.
1678 This also works if sym is an ENTRY. */
1681 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1683 gfc_symbol
* proc_sym
;
1684 gfc_symbol
* context_proc
;
1685 gfc_namespace
* real_context
;
1687 if (sym
->attr
.flavor
== FL_PROGRAM
1688 || gfc_fl_struct (sym
->attr
.flavor
))
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Check that name is not a derived type. */
1870 is_dt_name (const char *name
)
1872 gfc_symbol
*dt_list
, *dt_first
;
1874 dt_list
= dt_first
= gfc_derived_types
;
1875 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1877 if (strcmp(dt_list
->name
, name
) == 0)
1879 if (dt_first
== dt_list
->dt_next
)
1886 /* Resolve an actual argument list. Most of the time, this is just
1887 resolving the expressions in the list.
1888 The exception is that we sometimes have to decide whether arguments
1889 that look like procedure arguments are really simple variable
1893 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1894 bool no_formal_args
)
1897 gfc_symtree
*parent_st
;
1899 gfc_component
*comp
;
1900 int save_need_full_assumed_size
;
1901 bool return_value
= false;
1902 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1905 first_actual_arg
= true;
1907 for (; arg
; arg
= arg
->next
)
1912 /* Check the label is a valid branching target. */
1915 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1917 gfc_error ("Label %d referenced at %L is never defined",
1918 arg
->label
->value
, &arg
->label
->where
);
1922 first_actual_arg
= false;
1926 if (e
->expr_type
== EXPR_VARIABLE
1927 && e
->symtree
->n
.sym
->attr
.generic
1929 && count_specific_procs (e
) != 1)
1932 if (e
->ts
.type
!= BT_PROCEDURE
)
1934 save_need_full_assumed_size
= need_full_assumed_size
;
1935 if (e
->expr_type
!= EXPR_VARIABLE
)
1936 need_full_assumed_size
= 0;
1937 if (!gfc_resolve_expr (e
))
1939 need_full_assumed_size
= save_need_full_assumed_size
;
1943 /* See if the expression node should really be a variable reference. */
1945 sym
= e
->symtree
->n
.sym
;
1947 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1949 gfc_error ("Derived type %qs is used as an actual "
1950 "argument at %L", sym
->name
, &e
->where
);
1954 if (sym
->attr
.flavor
== FL_PROCEDURE
1955 || sym
->attr
.intrinsic
1956 || sym
->attr
.external
)
1960 /* If a procedure is not already determined to be something else
1961 check if it is intrinsic. */
1962 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1963 sym
->attr
.intrinsic
= 1;
1965 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1967 gfc_error ("Statement function %qs at %L is not allowed as an "
1968 "actual argument", sym
->name
, &e
->where
);
1971 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1972 sym
->attr
.subroutine
);
1973 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1975 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1976 "actual argument", sym
->name
, &e
->where
);
1979 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1980 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1982 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1983 " used as actual argument at %L",
1984 sym
->name
, &e
->where
))
1988 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1990 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1991 "allowed as an actual argument at %L", sym
->name
,
1995 /* Check if a generic interface has a specific procedure
1996 with the same name before emitting an error. */
1997 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2000 /* Just in case a specific was found for the expression. */
2001 sym
= e
->symtree
->n
.sym
;
2003 /* If the symbol is the function that names the current (or
2004 parent) scope, then we really have a variable reference. */
2006 if (gfc_is_function_return_value (sym
, sym
->ns
))
2009 /* If all else fails, see if we have a specific intrinsic. */
2010 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2012 gfc_intrinsic_sym
*isym
;
2014 isym
= gfc_find_function (sym
->name
);
2015 if (isym
== NULL
|| !isym
->specific
)
2017 gfc_error ("Unable to find a specific INTRINSIC procedure "
2018 "for the reference %qs at %L", sym
->name
,
2023 sym
->attr
.intrinsic
= 1;
2024 sym
->attr
.function
= 1;
2027 if (!gfc_resolve_expr (e
))
2032 /* See if the name is a module procedure in a parent unit. */
2034 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2037 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2039 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2043 if (parent_st
== NULL
)
2046 sym
= parent_st
->n
.sym
;
2047 e
->symtree
= parent_st
; /* Point to the right thing. */
2049 if (sym
->attr
.flavor
== FL_PROCEDURE
2050 || sym
->attr
.intrinsic
2051 || sym
->attr
.external
)
2053 if (!gfc_resolve_expr (e
))
2059 e
->expr_type
= EXPR_VARIABLE
;
2061 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2062 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2063 && CLASS_DATA (sym
)->as
))
2065 e
->rank
= sym
->ts
.type
== BT_CLASS
2066 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2067 e
->ref
= gfc_get_ref ();
2068 e
->ref
->type
= REF_ARRAY
;
2069 e
->ref
->u
.ar
.type
= AR_FULL
;
2070 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2071 ? CLASS_DATA (sym
)->as
: sym
->as
;
2074 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2075 primary.c (match_actual_arg). If above code determines that it
2076 is a variable instead, it needs to be resolved as it was not
2077 done at the beginning of this function. */
2078 save_need_full_assumed_size
= need_full_assumed_size
;
2079 if (e
->expr_type
!= EXPR_VARIABLE
)
2080 need_full_assumed_size
= 0;
2081 if (!gfc_resolve_expr (e
))
2083 need_full_assumed_size
= save_need_full_assumed_size
;
2086 /* Check argument list functions %VAL, %LOC and %REF. There is
2087 nothing to do for %REF. */
2088 if (arg
->name
&& arg
->name
[0] == '%')
2090 if (strcmp ("%VAL", arg
->name
) == 0)
2092 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2094 gfc_error ("By-value argument at %L is not of numeric "
2101 gfc_error ("By-value argument at %L cannot be an array or "
2102 "an array section", &e
->where
);
2106 /* Intrinsics are still PROC_UNKNOWN here. However,
2107 since same file external procedures are not resolvable
2108 in gfortran, it is a good deal easier to leave them to
2110 if (ptype
!= PROC_UNKNOWN
2111 && ptype
!= PROC_DUMMY
2112 && ptype
!= PROC_EXTERNAL
2113 && ptype
!= PROC_MODULE
)
2115 gfc_error ("By-value argument at %L is not allowed "
2116 "in this context", &e
->where
);
2121 /* Statement functions have already been excluded above. */
2122 else if (strcmp ("%LOC", arg
->name
) == 0
2123 && e
->ts
.type
== BT_PROCEDURE
)
2125 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2127 gfc_error ("Passing internal procedure at %L by location "
2128 "not allowed", &e
->where
);
2134 comp
= gfc_get_proc_ptr_comp(e
);
2135 if (e
->expr_type
== EXPR_VARIABLE
2136 && comp
&& comp
->attr
.elemental
)
2138 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2139 "allowed as an actual argument at %L", comp
->name
,
2143 /* Fortran 2008, C1237. */
2144 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2145 && gfc_has_ultimate_pointer (e
))
2147 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2148 "component", &e
->where
);
2152 first_actual_arg
= false;
2155 return_value
= true;
2158 actual_arg
= actual_arg_sav
;
2159 first_actual_arg
= first_actual_arg_sav
;
2161 return return_value
;
2165 /* Do the checks of the actual argument list that are specific to elemental
2166 procedures. If called with c == NULL, we have a function, otherwise if
2167 expr == NULL, we have a subroutine. */
2170 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2172 gfc_actual_arglist
*arg0
;
2173 gfc_actual_arglist
*arg
;
2174 gfc_symbol
*esym
= NULL
;
2175 gfc_intrinsic_sym
*isym
= NULL
;
2177 gfc_intrinsic_arg
*iformal
= NULL
;
2178 gfc_formal_arglist
*eformal
= NULL
;
2179 bool formal_optional
= false;
2180 bool set_by_optional
= false;
2184 /* Is this an elemental procedure? */
2185 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2187 if (expr
->value
.function
.esym
!= NULL
2188 && expr
->value
.function
.esym
->attr
.elemental
)
2190 arg0
= expr
->value
.function
.actual
;
2191 esym
= expr
->value
.function
.esym
;
2193 else if (expr
->value
.function
.isym
!= NULL
2194 && expr
->value
.function
.isym
->elemental
)
2196 arg0
= expr
->value
.function
.actual
;
2197 isym
= expr
->value
.function
.isym
;
2202 else if (c
&& c
->ext
.actual
!= NULL
)
2204 arg0
= c
->ext
.actual
;
2206 if (c
->resolved_sym
)
2207 esym
= c
->resolved_sym
;
2209 esym
= c
->symtree
->n
.sym
;
2212 if (!esym
->attr
.elemental
)
2218 /* The rank of an elemental is the rank of its array argument(s). */
2219 for (arg
= arg0
; arg
; arg
= arg
->next
)
2221 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2223 rank
= arg
->expr
->rank
;
2224 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2225 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2226 set_by_optional
= true;
2228 /* Function specific; set the result rank and shape. */
2232 if (!expr
->shape
&& arg
->expr
->shape
)
2234 expr
->shape
= gfc_get_shape (rank
);
2235 for (i
= 0; i
< rank
; i
++)
2236 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2243 /* If it is an array, it shall not be supplied as an actual argument
2244 to an elemental procedure unless an array of the same rank is supplied
2245 as an actual argument corresponding to a nonoptional dummy argument of
2246 that elemental procedure(12.4.1.5). */
2247 formal_optional
= false;
2249 iformal
= isym
->formal
;
2251 eformal
= esym
->formal
;
2253 for (arg
= arg0
; arg
; arg
= arg
->next
)
2257 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2258 formal_optional
= true;
2259 eformal
= eformal
->next
;
2261 else if (isym
&& iformal
)
2263 if (iformal
->optional
)
2264 formal_optional
= true;
2265 iformal
= iformal
->next
;
2268 formal_optional
= true;
2270 if (pedantic
&& arg
->expr
!= NULL
2271 && arg
->expr
->expr_type
== EXPR_VARIABLE
2272 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2275 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2276 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2278 gfc_warning (OPT_Wpedantic
,
2279 "%qs at %L is an array and OPTIONAL; IF IT IS "
2280 "MISSING, it cannot be the actual argument of an "
2281 "ELEMENTAL procedure unless there is a non-optional "
2282 "argument with the same rank (12.4.1.5)",
2283 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2287 for (arg
= arg0
; arg
; arg
= arg
->next
)
2289 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2292 /* Being elemental, the last upper bound of an assumed size array
2293 argument must be present. */
2294 if (resolve_assumed_size_actual (arg
->expr
))
2297 /* Elemental procedure's array actual arguments must conform. */
2300 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2307 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2308 is an array, the intent inout/out variable needs to be also an array. */
2309 if (rank
> 0 && esym
&& expr
== NULL
)
2310 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2311 arg
= arg
->next
, eformal
= eformal
->next
)
2312 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2313 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2314 && arg
->expr
&& arg
->expr
->rank
== 0)
2316 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2317 "ELEMENTAL subroutine %qs is a scalar, but another "
2318 "actual argument is an array", &arg
->expr
->where
,
2319 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2320 : "INOUT", eformal
->sym
->name
, esym
->name
);
2327 /* This function does the checking of references to global procedures
2328 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2329 77 and 95 standards. It checks for a gsymbol for the name, making
2330 one if it does not already exist. If it already exists, then the
2331 reference being resolved must correspond to the type of gsymbol.
2332 Otherwise, the new symbol is equipped with the attributes of the
2333 reference. The corresponding code that is called in creating
2334 global entities is parse.c.
2336 In addition, for all but -std=legacy, the gsymbols are used to
2337 check the interfaces of external procedures from the same file.
2338 The namespace of the gsymbol is resolved and then, once this is
2339 done the interface is checked. */
2343 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2345 if (!gsym_ns
->proc_name
->attr
.recursive
)
2348 if (sym
->ns
== gsym_ns
)
2351 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2358 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2360 if (gsym_ns
->entries
)
2362 gfc_entry_list
*entry
= gsym_ns
->entries
;
2364 for (; entry
; entry
= entry
->next
)
2366 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2368 if (strcmp (gsym_ns
->proc_name
->name
,
2369 sym
->ns
->proc_name
->name
) == 0)
2373 && strcmp (gsym_ns
->proc_name
->name
,
2374 sym
->ns
->parent
->proc_name
->name
) == 0)
2383 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2386 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2388 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2390 for ( ; arg
; arg
= arg
->next
)
2395 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2397 strncpy (errmsg
, _("allocatable argument"), err_len
);
2400 else if (arg
->sym
->attr
.asynchronous
)
2402 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2405 else if (arg
->sym
->attr
.optional
)
2407 strncpy (errmsg
, _("optional argument"), err_len
);
2410 else if (arg
->sym
->attr
.pointer
)
2412 strncpy (errmsg
, _("pointer argument"), err_len
);
2415 else if (arg
->sym
->attr
.target
)
2417 strncpy (errmsg
, _("target argument"), err_len
);
2420 else if (arg
->sym
->attr
.value
)
2422 strncpy (errmsg
, _("value argument"), err_len
);
2425 else if (arg
->sym
->attr
.volatile_
)
2427 strncpy (errmsg
, _("volatile argument"), err_len
);
2430 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2432 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2435 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2437 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2440 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2442 strncpy (errmsg
, _("coarray argument"), err_len
);
2445 else if (false) /* (2d) TODO: parametrized derived type */
2447 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2450 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2452 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2455 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2457 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2460 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2462 /* As assumed-type is unlimited polymorphic (cf. above).
2463 See also TS 29113, Note 6.1. */
2464 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2469 if (sym
->attr
.function
)
2471 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2473 if (res
->attr
.dimension
) /* (3a) */
2475 strncpy (errmsg
, _("array result"), err_len
);
2478 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2480 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2483 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2484 && res
->ts
.u
.cl
->length
2485 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2487 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2492 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2494 strncpy (errmsg
, _("elemental procedure"), err_len
);
2497 else if (sym
->attr
.is_bind_c
) /* (5) */
2499 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2508 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2512 enum gfc_symbol_type type
;
2515 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2517 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2518 sym
->binding_label
!= NULL
);
2520 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2521 gfc_global_used (gsym
, where
);
2523 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2524 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2525 && gsym
->type
!= GSYM_UNKNOWN
2526 && !gsym
->binding_label
2528 && gsym
->ns
->proc_name
2529 && not_in_recursive (sym
, gsym
->ns
)
2530 && not_entry_self_reference (sym
, gsym
->ns
))
2532 gfc_symbol
*def_sym
;
2533 def_sym
= gsym
->ns
->proc_name
;
2535 if (gsym
->ns
->resolved
!= -1)
2538 /* Resolve the gsymbol namespace if needed. */
2539 if (!gsym
->ns
->resolved
)
2541 gfc_symbol
*old_dt_list
;
2543 /* Stash away derived types so that the backend_decls
2544 do not get mixed up. */
2545 old_dt_list
= gfc_derived_types
;
2546 gfc_derived_types
= NULL
;
2548 gfc_resolve (gsym
->ns
);
2550 /* Store the new derived types with the global namespace. */
2551 if (gfc_derived_types
)
2552 gsym
->ns
->derived_types
= gfc_derived_types
;
2554 /* Restore the derived types of this namespace. */
2555 gfc_derived_types
= old_dt_list
;
2558 /* Make sure that translation for the gsymbol occurs before
2559 the procedure currently being resolved. */
2560 ns
= gfc_global_ns_list
;
2561 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2563 if (ns
->sibling
== gsym
->ns
)
2565 ns
->sibling
= gsym
->ns
->sibling
;
2566 gsym
->ns
->sibling
= gfc_global_ns_list
;
2567 gfc_global_ns_list
= gsym
->ns
;
2572 /* This can happen if a binding name has been specified. */
2573 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2574 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2576 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2578 gfc_entry_list
*entry
;
2579 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2580 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2582 def_sym
= entry
->sym
;
2588 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2590 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2591 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2592 gfc_typename (&def_sym
->ts
));
2596 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2597 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2599 gfc_error ("Explicit interface required for %qs at %L: %s",
2600 sym
->name
, &sym
->declared_at
, reason
);
2604 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2605 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2606 gfc_errors_to_warnings (true);
2608 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2609 reason
, sizeof(reason
), NULL
, NULL
))
2611 gfc_error_opt (0, "Interface mismatch in global procedure %qs at %L:"
2612 " %s", sym
->name
, &sym
->declared_at
, reason
);
2618 gfc_errors_to_warnings (false);
2620 if (gsym
->type
== GSYM_UNKNOWN
)
2623 gsym
->where
= *where
;
2630 /************* Function resolution *************/
2632 /* Resolve a function call known to be generic.
2633 Section 14.1.2.4.1. */
2636 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2640 if (sym
->attr
.generic
)
2642 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2645 expr
->value
.function
.name
= s
->name
;
2646 expr
->value
.function
.esym
= s
;
2648 if (s
->ts
.type
!= BT_UNKNOWN
)
2650 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2651 expr
->ts
= s
->result
->ts
;
2654 expr
->rank
= s
->as
->rank
;
2655 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2656 expr
->rank
= s
->result
->as
->rank
;
2658 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2663 /* TODO: Need to search for elemental references in generic
2667 if (sym
->attr
.intrinsic
)
2668 return gfc_intrinsic_func_interface (expr
, 0);
2675 resolve_generic_f (gfc_expr
*expr
)
2679 gfc_interface
*intr
= NULL
;
2681 sym
= expr
->symtree
->n
.sym
;
2685 m
= resolve_generic_f0 (expr
, sym
);
2688 else if (m
== MATCH_ERROR
)
2693 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2694 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2697 if (sym
->ns
->parent
== NULL
)
2699 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2703 if (!generic_sym (sym
))
2707 /* Last ditch attempt. See if the reference is to an intrinsic
2708 that possesses a matching interface. 14.1.2.4 */
2709 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2711 if (gfc_init_expr_flag
)
2712 gfc_error ("Function %qs in initialization expression at %L "
2713 "must be an intrinsic function",
2714 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2716 gfc_error ("There is no specific function for the generic %qs "
2717 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2723 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2726 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2728 return resolve_structure_cons (expr
, 0);
2731 m
= gfc_intrinsic_func_interface (expr
, 0);
2736 gfc_error ("Generic function %qs at %L is not consistent with a "
2737 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2744 /* Resolve a function call known to be specific. */
2747 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2751 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2753 if (sym
->attr
.dummy
)
2755 sym
->attr
.proc
= PROC_DUMMY
;
2759 sym
->attr
.proc
= PROC_EXTERNAL
;
2763 if (sym
->attr
.proc
== PROC_MODULE
2764 || sym
->attr
.proc
== PROC_ST_FUNCTION
2765 || sym
->attr
.proc
== PROC_INTERNAL
)
2768 if (sym
->attr
.intrinsic
)
2770 m
= gfc_intrinsic_func_interface (expr
, 1);
2774 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2775 "with an intrinsic", sym
->name
, &expr
->where
);
2783 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2786 expr
->ts
= sym
->result
->ts
;
2789 expr
->value
.function
.name
= sym
->name
;
2790 expr
->value
.function
.esym
= sym
;
2791 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2793 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2795 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2796 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2797 else if (sym
->as
!= NULL
)
2798 expr
->rank
= sym
->as
->rank
;
2805 resolve_specific_f (gfc_expr
*expr
)
2810 sym
= expr
->symtree
->n
.sym
;
2814 m
= resolve_specific_f0 (sym
, expr
);
2817 if (m
== MATCH_ERROR
)
2820 if (sym
->ns
->parent
== NULL
)
2823 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2829 gfc_error ("Unable to resolve the specific function %qs at %L",
2830 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2835 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2836 candidates in CANDIDATES_LEN. */
2839 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2841 size_t &candidates_len
)
2847 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2848 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2849 vec_push (candidates
, candidates_len
, sym
->name
);
2853 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2857 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2861 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2864 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2866 char **candidates
= NULL
;
2867 size_t candidates_len
= 0;
2868 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2869 return gfc_closest_fuzzy_match (fn
, candidates
);
2873 /* Resolve a procedure call not known to be generic nor specific. */
2876 resolve_unknown_f (gfc_expr
*expr
)
2881 sym
= expr
->symtree
->n
.sym
;
2883 if (sym
->attr
.dummy
)
2885 sym
->attr
.proc
= PROC_DUMMY
;
2886 expr
->value
.function
.name
= sym
->name
;
2890 /* See if we have an intrinsic function reference. */
2892 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2894 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2899 /* The reference is to an external name. */
2901 sym
->attr
.proc
= PROC_EXTERNAL
;
2902 expr
->value
.function
.name
= sym
->name
;
2903 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2905 if (sym
->as
!= NULL
)
2906 expr
->rank
= sym
->as
->rank
;
2908 /* Type of the expression is either the type of the symbol or the
2909 default type of the symbol. */
2912 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2914 if (sym
->ts
.type
!= BT_UNKNOWN
)
2918 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2920 if (ts
->type
== BT_UNKNOWN
)
2923 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2925 gfc_error ("Function %qs at %L has no IMPLICIT type"
2926 "; did you mean %qs?",
2927 sym
->name
, &expr
->where
, guessed
);
2929 gfc_error ("Function %qs at %L has no IMPLICIT type",
2930 sym
->name
, &expr
->where
);
2941 /* Return true, if the symbol is an external procedure. */
2943 is_external_proc (gfc_symbol
*sym
)
2945 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2946 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2947 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2948 && !sym
->attr
.proc_pointer
2949 && !sym
->attr
.use_assoc
2957 /* Figure out if a function reference is pure or not. Also set the name
2958 of the function for a potential error message. Return nonzero if the
2959 function is PURE, zero if not. */
2961 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2964 gfc_pure_function (gfc_expr
*e
, const char **name
)
2967 gfc_component
*comp
;
2971 if (e
->symtree
!= NULL
2972 && e
->symtree
->n
.sym
!= NULL
2973 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2974 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2976 comp
= gfc_get_proc_ptr_comp (e
);
2979 pure
= gfc_pure (comp
->ts
.interface
);
2982 else if (e
->value
.function
.esym
)
2984 pure
= gfc_pure (e
->value
.function
.esym
);
2985 *name
= e
->value
.function
.esym
->name
;
2987 else if (e
->value
.function
.isym
)
2989 pure
= e
->value
.function
.isym
->pure
2990 || e
->value
.function
.isym
->elemental
;
2991 *name
= e
->value
.function
.isym
->name
;
2995 /* Implicit functions are not pure. */
2997 *name
= e
->value
.function
.name
;
3004 /* Check if the expression is a reference to an implicitly pure function. */
3007 gfc_implicit_pure_function (gfc_expr
*e
)
3009 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3011 return gfc_implicit_pure (comp
->ts
.interface
);
3012 else if (e
->value
.function
.esym
)
3013 return gfc_implicit_pure (e
->value
.function
.esym
);
3020 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3021 int *f ATTRIBUTE_UNUSED
)
3025 /* Don't bother recursing into other statement functions
3026 since they will be checked individually for purity. */
3027 if (e
->expr_type
!= EXPR_FUNCTION
3029 || e
->symtree
->n
.sym
== sym
3030 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3033 return gfc_pure_function (e
, &name
) ? false : true;
3038 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3040 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3044 /* Check if an impure function is allowed in the current context. */
3046 static bool check_pure_function (gfc_expr
*e
)
3048 const char *name
= NULL
;
3049 if (!gfc_pure_function (e
, &name
) && name
)
3053 gfc_error ("Reference to impure function %qs at %L inside a "
3054 "FORALL %s", name
, &e
->where
,
3055 forall_flag
== 2 ? "mask" : "block");
3058 else if (gfc_do_concurrent_flag
)
3060 gfc_error ("Reference to impure function %qs at %L inside a "
3061 "DO CONCURRENT %s", name
, &e
->where
,
3062 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3065 else if (gfc_pure (NULL
))
3067 gfc_error ("Reference to impure function %qs at %L "
3068 "within a PURE procedure", name
, &e
->where
);
3071 if (!gfc_implicit_pure_function (e
))
3072 gfc_unset_implicit_pure (NULL
);
3078 /* Update current procedure's array_outer_dependency flag, considering
3079 a call to procedure SYM. */
3082 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3084 /* Check to see if this is a sibling function that has not yet
3086 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3087 for (; sibling
; sibling
= sibling
->sibling
)
3089 if (sibling
->proc_name
== sym
)
3091 gfc_resolve (sibling
);
3096 /* If SYM has references to outer arrays, so has the procedure calling
3097 SYM. If SYM is a procedure pointer, we can assume the worst. */
3098 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3099 && gfc_current_ns
->proc_name
)
3100 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3104 /* Resolve a function call, which means resolving the arguments, then figuring
3105 out which entity the name refers to. */
3108 resolve_function (gfc_expr
*expr
)
3110 gfc_actual_arglist
*arg
;
3114 procedure_type p
= PROC_INTRINSIC
;
3115 bool no_formal_args
;
3119 sym
= expr
->symtree
->n
.sym
;
3121 /* If this is a procedure pointer component, it has already been resolved. */
3122 if (gfc_is_proc_ptr_comp (expr
))
3125 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3127 if (sym
&& sym
->attr
.intrinsic
3128 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3129 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3134 gfc_error ("Unexpected junk after %qs at %L", expr
->symtree
->n
.sym
->name
,
3139 if (sym
&& sym
->attr
.intrinsic
3140 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3143 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3145 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3149 /* If this is a deferred TBP with an abstract interface (which may
3150 of course be referenced), expr->value.function.esym will be set. */
3151 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3153 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3154 sym
->name
, &expr
->where
);
3158 /* If this is a deferred TBP with an abstract interface, its result
3159 cannot be an assumed length character (F2003: C418). */
3160 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3161 && sym
->result
->ts
.u
.cl
3162 && sym
->result
->ts
.u
.cl
->length
== NULL
3163 && !sym
->result
->ts
.deferred
)
3165 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3166 "character length result (F2008: C418)", sym
->name
,
3171 /* Switch off assumed size checking and do this again for certain kinds
3172 of procedure, once the procedure itself is resolved. */
3173 need_full_assumed_size
++;
3175 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3176 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3178 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3179 inquiry_argument
= true;
3180 no_formal_args
= sym
&& is_external_proc (sym
)
3181 && gfc_sym_get_dummy_args (sym
) == NULL
;
3183 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3186 inquiry_argument
= false;
3190 inquiry_argument
= false;
3192 /* Resume assumed_size checking. */
3193 need_full_assumed_size
--;
3195 /* If the procedure is external, check for usage. */
3196 if (sym
&& is_external_proc (sym
))
3197 resolve_global_procedure (sym
, &expr
->where
, 0);
3199 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3201 && sym
->ts
.u
.cl
->length
== NULL
3203 && !sym
->ts
.deferred
3204 && expr
->value
.function
.esym
== NULL
3205 && !sym
->attr
.contained
)
3207 /* Internal procedures are taken care of in resolve_contained_fntype. */
3208 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3209 "be used at %L since it is not a dummy argument",
3210 sym
->name
, &expr
->where
);
3214 /* See if function is already resolved. */
3216 if (expr
->value
.function
.name
!= NULL
3217 || expr
->value
.function
.isym
!= NULL
)
3219 if (expr
->ts
.type
== BT_UNKNOWN
)
3225 /* Apply the rules of section 14.1.2. */
3227 switch (procedure_kind (sym
))
3230 t
= resolve_generic_f (expr
);
3233 case PTYPE_SPECIFIC
:
3234 t
= resolve_specific_f (expr
);
3238 t
= resolve_unknown_f (expr
);
3242 gfc_internal_error ("resolve_function(): bad function type");
3246 /* If the expression is still a function (it might have simplified),
3247 then we check to see if we are calling an elemental function. */
3249 if (expr
->expr_type
!= EXPR_FUNCTION
)
3252 /* Walk the argument list looking for invalid BOZ. */
3253 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3254 if (arg
->expr
&& arg
->expr
->ts
.type
== BT_BOZ
)
3256 gfc_error ("A BOZ literal constant at %L cannot appear as an "
3257 "actual argument in a function reference",
3262 temp
= need_full_assumed_size
;
3263 need_full_assumed_size
= 0;
3265 if (!resolve_elemental_actual (expr
, NULL
))
3268 if (omp_workshare_flag
3269 && expr
->value
.function
.esym
3270 && ! gfc_elemental (expr
->value
.function
.esym
))
3272 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3273 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3278 #define GENERIC_ID expr->value.function.isym->id
3279 else if (expr
->value
.function
.actual
!= NULL
3280 && expr
->value
.function
.isym
!= NULL
3281 && GENERIC_ID
!= GFC_ISYM_LBOUND
3282 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3283 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3284 && GENERIC_ID
!= GFC_ISYM_LEN
3285 && GENERIC_ID
!= GFC_ISYM_LOC
3286 && GENERIC_ID
!= GFC_ISYM_C_LOC
3287 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3289 /* Array intrinsics must also have the last upper bound of an
3290 assumed size array argument. UBOUND and SIZE have to be
3291 excluded from the check if the second argument is anything
3294 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3296 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3297 && arg
== expr
->value
.function
.actual
3298 && arg
->next
!= NULL
&& arg
->next
->expr
)
3300 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3303 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3306 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3311 if (arg
->expr
!= NULL
3312 && arg
->expr
->rank
> 0
3313 && resolve_assumed_size_actual (arg
->expr
))
3319 need_full_assumed_size
= temp
;
3321 if (!check_pure_function(expr
))
3324 /* Functions without the RECURSIVE attribution are not allowed to
3325 * call themselves. */
3326 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3329 esym
= expr
->value
.function
.esym
;
3331 if (is_illegal_recursion (esym
, gfc_current_ns
))
3333 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3334 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3335 " function %qs is not RECURSIVE",
3336 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3338 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3339 " is not RECURSIVE", esym
->name
, &expr
->where
);
3345 /* Character lengths of use associated functions may contains references to
3346 symbols not referenced from the current program unit otherwise. Make sure
3347 those symbols are marked as referenced. */
3349 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3350 && expr
->value
.function
.esym
->attr
.use_assoc
)
3352 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3355 /* Make sure that the expression has a typespec that works. */
3356 if (expr
->ts
.type
== BT_UNKNOWN
)
3358 if (expr
->symtree
->n
.sym
->result
3359 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3360 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3361 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3364 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3366 if (expr
->value
.function
.esym
)
3367 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3369 update_current_proc_array_outer_dependency (sym
);
3372 /* typebound procedure: Assume the worst. */
3373 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3379 /************* Subroutine resolution *************/
3382 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3389 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3393 else if (gfc_do_concurrent_flag
)
3395 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3399 else if (gfc_pure (NULL
))
3401 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3405 gfc_unset_implicit_pure (NULL
);
3411 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3415 if (sym
->attr
.generic
)
3417 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3420 c
->resolved_sym
= s
;
3421 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3426 /* TODO: Need to search for elemental references in generic interface. */
3429 if (sym
->attr
.intrinsic
)
3430 return gfc_intrinsic_sub_interface (c
, 0);
3437 resolve_generic_s (gfc_code
*c
)
3442 sym
= c
->symtree
->n
.sym
;
3446 m
= resolve_generic_s0 (c
, sym
);
3449 else if (m
== MATCH_ERROR
)
3453 if (sym
->ns
->parent
== NULL
)
3455 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3459 if (!generic_sym (sym
))
3463 /* Last ditch attempt. See if the reference is to an intrinsic
3464 that possesses a matching interface. 14.1.2.4 */
3465 sym
= c
->symtree
->n
.sym
;
3467 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3469 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3470 sym
->name
, &c
->loc
);
3474 m
= gfc_intrinsic_sub_interface (c
, 0);
3478 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3479 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3485 /* Resolve a subroutine call known to be specific. */
3488 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3492 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3494 if (sym
->attr
.dummy
)
3496 sym
->attr
.proc
= PROC_DUMMY
;
3500 sym
->attr
.proc
= PROC_EXTERNAL
;
3504 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3507 if (sym
->attr
.intrinsic
)
3509 m
= gfc_intrinsic_sub_interface (c
, 1);
3513 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3514 "with an intrinsic", sym
->name
, &c
->loc
);
3522 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3524 c
->resolved_sym
= sym
;
3525 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3533 resolve_specific_s (gfc_code
*c
)
3538 sym
= c
->symtree
->n
.sym
;
3542 m
= resolve_specific_s0 (c
, sym
);
3545 if (m
== MATCH_ERROR
)
3548 if (sym
->ns
->parent
== NULL
)
3551 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3557 sym
= c
->symtree
->n
.sym
;
3558 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3559 sym
->name
, &c
->loc
);
3565 /* Resolve a subroutine call not known to be generic nor specific. */
3568 resolve_unknown_s (gfc_code
*c
)
3572 sym
= c
->symtree
->n
.sym
;
3574 if (sym
->attr
.dummy
)
3576 sym
->attr
.proc
= PROC_DUMMY
;
3580 /* See if we have an intrinsic function reference. */
3582 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3584 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3589 /* The reference is to an external name. */
3592 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3594 c
->resolved_sym
= sym
;
3596 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3600 /* Resolve a subroutine call. Although it was tempting to use the same code
3601 for functions, subroutines and functions are stored differently and this
3602 makes things awkward. */
3605 resolve_call (gfc_code
*c
)
3608 procedure_type ptype
= PROC_INTRINSIC
;
3609 gfc_symbol
*csym
, *sym
;
3610 bool no_formal_args
;
3612 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3614 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3616 gfc_error ("%qs at %L has a type, which is not consistent with "
3617 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3621 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3624 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3625 sym
= st
? st
->n
.sym
: NULL
;
3626 if (sym
&& csym
!= sym
3627 && sym
->ns
== gfc_current_ns
3628 && sym
->attr
.flavor
== FL_PROCEDURE
3629 && sym
->attr
.contained
)
3632 if (csym
->attr
.generic
)
3633 c
->symtree
->n
.sym
= sym
;
3636 csym
= c
->symtree
->n
.sym
;
3640 /* If this ia a deferred TBP, c->expr1 will be set. */
3641 if (!c
->expr1
&& csym
)
3643 if (csym
->attr
.abstract
)
3645 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3646 csym
->name
, &c
->loc
);
3650 /* Subroutines without the RECURSIVE attribution are not allowed to
3652 if (is_illegal_recursion (csym
, gfc_current_ns
))
3654 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3655 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3656 "as subroutine %qs is not RECURSIVE",
3657 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3659 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3660 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3666 /* Switch off assumed size checking and do this again for certain kinds
3667 of procedure, once the procedure itself is resolved. */
3668 need_full_assumed_size
++;
3671 ptype
= csym
->attr
.proc
;
3673 no_formal_args
= csym
&& is_external_proc (csym
)
3674 && gfc_sym_get_dummy_args (csym
) == NULL
;
3675 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3678 /* Resume assumed_size checking. */
3679 need_full_assumed_size
--;
3681 /* If external, check for usage. */
3682 if (csym
&& is_external_proc (csym
))
3683 resolve_global_procedure (csym
, &c
->loc
, 1);
3686 if (c
->resolved_sym
== NULL
)
3688 c
->resolved_isym
= NULL
;
3689 switch (procedure_kind (csym
))
3692 t
= resolve_generic_s (c
);
3695 case PTYPE_SPECIFIC
:
3696 t
= resolve_specific_s (c
);
3700 t
= resolve_unknown_s (c
);
3704 gfc_internal_error ("resolve_subroutine(): bad function type");
3708 /* Some checks of elemental subroutine actual arguments. */
3709 if (!resolve_elemental_actual (NULL
, c
))
3713 update_current_proc_array_outer_dependency (csym
);
3715 /* Typebound procedure: Assume the worst. */
3716 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3722 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3723 op1->shape and op2->shape are non-NULL return true if their shapes
3724 match. If both op1->shape and op2->shape are non-NULL return false
3725 if their shapes do not match. If either op1->shape or op2->shape is
3726 NULL, return true. */
3729 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3736 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3738 for (i
= 0; i
< op1
->rank
; i
++)
3740 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3742 gfc_error ("Shapes for operands at %L and %L are not conformable",
3743 &op1
->where
, &op2
->where
);
3753 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3754 For example A .AND. B becomes IAND(A, B). */
3756 logical_to_bitwise (gfc_expr
*e
)
3758 gfc_expr
*tmp
, *op1
, *op2
;
3760 gfc_actual_arglist
*args
= NULL
;
3762 gcc_assert (e
->expr_type
== EXPR_OP
);
3764 isym
= GFC_ISYM_NONE
;
3765 op1
= e
->value
.op
.op1
;
3766 op2
= e
->value
.op
.op2
;
3768 switch (e
->value
.op
.op
)
3771 isym
= GFC_ISYM_NOT
;
3774 isym
= GFC_ISYM_IAND
;
3777 isym
= GFC_ISYM_IOR
;
3779 case INTRINSIC_NEQV
:
3780 isym
= GFC_ISYM_IEOR
;
3783 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3784 Change the old expression to NEQV, which will get replaced by IEOR,
3785 and wrap it in NOT. */
3786 tmp
= gfc_copy_expr (e
);
3787 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3788 tmp
= logical_to_bitwise (tmp
);
3789 isym
= GFC_ISYM_NOT
;
3794 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3797 /* Inherit the original operation's operands as arguments. */
3798 args
= gfc_get_actual_arglist ();
3802 args
->next
= gfc_get_actual_arglist ();
3803 args
->next
->expr
= op2
;
3806 /* Convert the expression to a function call. */
3807 e
->expr_type
= EXPR_FUNCTION
;
3808 e
->value
.function
.actual
= args
;
3809 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3810 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3811 e
->value
.function
.esym
= NULL
;
3813 /* Make up a pre-resolved function call symtree if we need to. */
3814 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3817 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3818 sym
= e
->symtree
->n
.sym
;
3820 sym
->attr
.flavor
= FL_PROCEDURE
;
3821 sym
->attr
.function
= 1;
3822 sym
->attr
.elemental
= 1;
3824 sym
->attr
.referenced
= 1;
3825 gfc_intrinsic_symbol (sym
);
3826 gfc_commit_symbol (sym
);
3829 args
->name
= e
->value
.function
.isym
->formal
->name
;
3830 if (e
->value
.function
.isym
->formal
->next
)
3831 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3836 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3837 candidates in CANDIDATES_LEN. */
3839 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3841 size_t &candidates_len
)
3848 /* Not sure how to properly filter here. Use all for a start.
3849 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3850 these as i suppose they don't make terribly sense. */
3852 if (uop
->n
.uop
->op
!= NULL
)
3853 vec_push (candidates
, candidates_len
, uop
->name
);
3857 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3861 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3864 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3867 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3869 char **candidates
= NULL
;
3870 size_t candidates_len
= 0;
3871 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3872 return gfc_closest_fuzzy_match (op
, candidates
);
3876 /* Callback finding an impure function as an operand to an .and. or
3877 .or. expression. Remember the last function warned about to
3878 avoid double warnings when recursing. */
3881 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3886 static gfc_expr
*last
= NULL
;
3887 bool *found
= (bool *) data
;
3889 if (f
->expr_type
== EXPR_FUNCTION
)
3892 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3893 && !gfc_implicit_pure_function (f
))
3896 gfc_warning (OPT_Wfunction_elimination
,
3897 "Impure function %qs at %L might not be evaluated",
3900 gfc_warning (OPT_Wfunction_elimination
,
3901 "Impure function at %L might not be evaluated",
3910 /* Return true if TYPE is character based, false otherwise. */
3913 is_character_based (bt type
)
3915 return type
== BT_CHARACTER
|| type
== BT_HOLLERITH
;
3919 /* If expression is a hollerith, convert it to character and issue a warning
3920 for the conversion. */
3923 convert_hollerith_to_character (gfc_expr
*e
)
3925 if (e
->ts
.type
== BT_HOLLERITH
)
3929 t
.type
= BT_CHARACTER
;
3930 t
.kind
= e
->ts
.kind
;
3931 gfc_convert_type_warn (e
, &t
, 2, 1);
3935 /* Convert to numeric and issue a warning for the conversion. */
3938 convert_to_numeric (gfc_expr
*a
, gfc_expr
*b
)
3942 t
.type
= b
->ts
.type
;
3943 t
.kind
= b
->ts
.kind
;
3944 gfc_convert_type_warn (a
, &t
, 2, 1);
3947 /* Resolve an operator expression node. This can involve replacing the
3948 operation with a user defined function call. */
3951 resolve_operator (gfc_expr
*e
)
3953 gfc_expr
*op1
, *op2
;
3955 bool dual_locus_error
;
3958 /* Resolve all subnodes-- give them types. */
3960 switch (e
->value
.op
.op
)
3963 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3969 case INTRINSIC_UPLUS
:
3970 case INTRINSIC_UMINUS
:
3971 case INTRINSIC_PARENTHESES
:
3972 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3975 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3977 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3978 "unary operator %qs", &e
->value
.op
.op1
->where
,
3979 gfc_op2string (e
->value
.op
.op
));
3985 /* Typecheck the new node. */
3987 op1
= e
->value
.op
.op1
;
3988 op2
= e
->value
.op
.op2
;
3989 dual_locus_error
= false;
3991 /* op1 and op2 cannot both be BOZ. */
3992 if (op1
&& op1
->ts
.type
== BT_BOZ
3993 && op2
&& op2
->ts
.type
== BT_BOZ
)
3995 gfc_error ("Operands at %L and %L cannot appear as operands of "
3996 "binary operator %qs", &op1
->where
, &op2
->where
,
3997 gfc_op2string (e
->value
.op
.op
));
4001 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
4002 || (op2
&& op2
->expr_type
== EXPR_NULL
))
4004 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
4008 switch (e
->value
.op
.op
)
4010 case INTRINSIC_UPLUS
:
4011 case INTRINSIC_UMINUS
:
4012 if (op1
->ts
.type
== BT_INTEGER
4013 || op1
->ts
.type
== BT_REAL
4014 || op1
->ts
.type
== BT_COMPLEX
)
4020 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
4021 gfc_op2string (e
->value
.op
.op
), gfc_typename (e
));
4024 case INTRINSIC_PLUS
:
4025 case INTRINSIC_MINUS
:
4026 case INTRINSIC_TIMES
:
4027 case INTRINSIC_DIVIDE
:
4028 case INTRINSIC_POWER
:
4029 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4031 gfc_type_convert_binary (e
, 1);
4035 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
4037 _("Unexpected derived-type entities in binary intrinsic "
4038 "numeric operator %%<%s%%> at %%L"),
4039 gfc_op2string (e
->value
.op
.op
));
4042 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
4043 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4044 gfc_typename (op2
));
4047 case INTRINSIC_CONCAT
:
4048 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4049 && op1
->ts
.kind
== op2
->ts
.kind
)
4051 e
->ts
.type
= BT_CHARACTER
;
4052 e
->ts
.kind
= op1
->ts
.kind
;
4057 _("Operands of string concatenation operator at %%L are %s/%s"),
4058 gfc_typename (op1
), gfc_typename (op2
));
4064 case INTRINSIC_NEQV
:
4065 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4067 e
->ts
.type
= BT_LOGICAL
;
4068 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4069 if (op1
->ts
.kind
< e
->ts
.kind
)
4070 gfc_convert_type (op1
, &e
->ts
, 2);
4071 else if (op2
->ts
.kind
< e
->ts
.kind
)
4072 gfc_convert_type (op2
, &e
->ts
, 2);
4074 if (flag_frontend_optimize
&&
4075 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4077 /* Warn about short-circuiting
4078 with impure function as second operand. */
4080 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4085 /* Logical ops on integers become bitwise ops with -fdec. */
4087 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4089 e
->ts
.type
= BT_INTEGER
;
4090 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4091 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4092 gfc_convert_type (op1
, &e
->ts
, 1);
4093 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4094 gfc_convert_type (op2
, &e
->ts
, 1);
4095 e
= logical_to_bitwise (e
);
4099 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4100 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4101 gfc_typename (op2
));
4106 /* Logical ops on integers become bitwise ops with -fdec. */
4107 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4109 e
->ts
.type
= BT_INTEGER
;
4110 e
->ts
.kind
= op1
->ts
.kind
;
4111 e
= logical_to_bitwise (e
);
4115 if (op1
->ts
.type
== BT_LOGICAL
)
4117 e
->ts
.type
= BT_LOGICAL
;
4118 e
->ts
.kind
= op1
->ts
.kind
;
4122 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4123 gfc_typename (op1
));
4127 case INTRINSIC_GT_OS
:
4129 case INTRINSIC_GE_OS
:
4131 case INTRINSIC_LT_OS
:
4133 case INTRINSIC_LE_OS
:
4134 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4136 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4143 case INTRINSIC_EQ_OS
:
4145 case INTRINSIC_NE_OS
:
4148 && is_character_based (op1
->ts
.type
)
4149 && is_character_based (op2
->ts
.type
))
4151 convert_hollerith_to_character (op1
);
4152 convert_hollerith_to_character (op2
);
4155 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4156 && op1
->ts
.kind
== op2
->ts
.kind
)
4158 e
->ts
.type
= BT_LOGICAL
;
4159 e
->ts
.kind
= gfc_default_logical_kind
;
4163 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4164 if (op1
->ts
.type
== BT_BOZ
)
4166 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4167 "an operand of a relational operator",
4171 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4174 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4178 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4179 if (op2
->ts
.type
== BT_BOZ
)
4181 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4182 "an operand of a relational operator",
4186 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4189 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4193 && op1
->ts
.type
== BT_HOLLERITH
&& gfc_numeric_ts (&op2
->ts
))
4194 convert_to_numeric (op1
, op2
);
4197 && gfc_numeric_ts (&op1
->ts
) && op2
->ts
.type
== BT_HOLLERITH
)
4198 convert_to_numeric (op2
, op1
);
4200 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4202 gfc_type_convert_binary (e
, 1);
4204 e
->ts
.type
= BT_LOGICAL
;
4205 e
->ts
.kind
= gfc_default_logical_kind
;
4207 if (warn_compare_reals
)
4209 gfc_intrinsic_op op
= e
->value
.op
.op
;
4211 /* Type conversion has made sure that the types of op1 and op2
4212 agree, so it is only necessary to check the first one. */
4213 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4214 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4215 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4219 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4220 msg
= "Equality comparison for %s at %L";
4222 msg
= "Inequality comparison for %s at %L";
4224 gfc_warning (OPT_Wcompare_reals
, msg
,
4225 gfc_typename (op1
), &op1
->where
);
4232 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4234 _("Logicals at %%L must be compared with %s instead of %s"),
4235 (e
->value
.op
.op
== INTRINSIC_EQ
4236 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4237 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4240 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4241 gfc_op2string (e
->value
.op
.op
), gfc_typename (op1
),
4242 gfc_typename (op2
));
4246 case INTRINSIC_USER
:
4247 if (e
->value
.op
.uop
->op
== NULL
)
4249 const char *name
= e
->value
.op
.uop
->name
;
4250 const char *guessed
;
4251 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4253 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4256 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4258 else if (op2
== NULL
)
4259 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4260 e
->value
.op
.uop
->name
, gfc_typename (op1
));
4263 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4264 e
->value
.op
.uop
->name
, gfc_typename (op1
),
4265 gfc_typename (op2
));
4266 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4271 case INTRINSIC_PARENTHESES
:
4273 if (e
->ts
.type
== BT_CHARACTER
)
4274 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4278 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4281 /* Deal with arrayness of an operand through an operator. */
4283 switch (e
->value
.op
.op
)
4285 case INTRINSIC_PLUS
:
4286 case INTRINSIC_MINUS
:
4287 case INTRINSIC_TIMES
:
4288 case INTRINSIC_DIVIDE
:
4289 case INTRINSIC_POWER
:
4290 case INTRINSIC_CONCAT
:
4294 case INTRINSIC_NEQV
:
4296 case INTRINSIC_EQ_OS
:
4298 case INTRINSIC_NE_OS
:
4300 case INTRINSIC_GT_OS
:
4302 case INTRINSIC_GE_OS
:
4304 case INTRINSIC_LT_OS
:
4306 case INTRINSIC_LE_OS
:
4308 if (op1
->rank
== 0 && op2
->rank
== 0)
4311 if (op1
->rank
== 0 && op2
->rank
!= 0)
4313 e
->rank
= op2
->rank
;
4315 if (e
->shape
== NULL
)
4316 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4319 if (op1
->rank
!= 0 && op2
->rank
== 0)
4321 e
->rank
= op1
->rank
;
4323 if (e
->shape
== NULL
)
4324 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4327 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4329 if (op1
->rank
== op2
->rank
)
4331 e
->rank
= op1
->rank
;
4332 if (e
->shape
== NULL
)
4334 t
= compare_shapes (op1
, op2
);
4338 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4343 /* Allow higher level expressions to work. */
4346 /* Try user-defined operators, and otherwise throw an error. */
4347 dual_locus_error
= true;
4349 _("Inconsistent ranks for operator at %%L and %%L"));
4356 case INTRINSIC_PARENTHESES
:
4358 case INTRINSIC_UPLUS
:
4359 case INTRINSIC_UMINUS
:
4360 /* Simply copy arrayness attribute */
4361 e
->rank
= op1
->rank
;
4363 if (e
->shape
== NULL
)
4364 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4374 /* Attempt to simplify the expression. */
4377 t
= gfc_simplify_expr (e
, 0);
4378 /* Some calls do not succeed in simplification and return false
4379 even though there is no error; e.g. variable references to
4380 PARAMETER arrays. */
4381 if (!gfc_is_constant_expr (e
))
4389 match m
= gfc_extend_expr (e
);
4392 if (m
== MATCH_ERROR
)
4396 if (dual_locus_error
)
4397 gfc_error (msg
, &op1
->where
, &op2
->where
);
4399 gfc_error (msg
, &e
->where
);
4405 /************** Array resolution subroutines **************/
4408 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4410 /* Compare two integer expressions. */
4412 static compare_result
4413 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4417 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4418 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4421 /* If either of the types isn't INTEGER, we must have
4422 raised an error earlier. */
4424 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4427 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4437 /* Compare an integer expression with an integer. */
4439 static compare_result
4440 compare_bound_int (gfc_expr
*a
, int b
)
4444 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4447 if (a
->ts
.type
!= BT_INTEGER
)
4448 gfc_internal_error ("compare_bound_int(): Bad expression");
4450 i
= mpz_cmp_si (a
->value
.integer
, b
);
4460 /* Compare an integer expression with a mpz_t. */
4462 static compare_result
4463 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4467 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4470 if (a
->ts
.type
!= BT_INTEGER
)
4471 gfc_internal_error ("compare_bound_int(): Bad expression");
4473 i
= mpz_cmp (a
->value
.integer
, b
);
4483 /* Compute the last value of a sequence given by a triplet.
4484 Return 0 if it wasn't able to compute the last value, or if the
4485 sequence if empty, and 1 otherwise. */
4488 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4489 gfc_expr
*stride
, mpz_t last
)
4493 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4494 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4495 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4498 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4499 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4502 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4504 if (compare_bound (start
, end
) == CMP_GT
)
4506 mpz_set (last
, end
->value
.integer
);
4510 if (compare_bound_int (stride
, 0) == CMP_GT
)
4512 /* Stride is positive */
4513 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4518 /* Stride is negative */
4519 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4524 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4525 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4526 mpz_sub (last
, end
->value
.integer
, rem
);
4533 /* Compare a single dimension of an array reference to the array
4537 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4541 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4543 gcc_assert (ar
->stride
[i
] == NULL
);
4544 /* This implies [*] as [*:] and [*:3] are not possible. */
4545 if (ar
->start
[i
] == NULL
)
4547 gcc_assert (ar
->end
[i
] == NULL
);
4552 /* Given start, end and stride values, calculate the minimum and
4553 maximum referenced indexes. */
4555 switch (ar
->dimen_type
[i
])
4558 case DIMEN_THIS_IMAGE
:
4563 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4566 gfc_warning (0, "Array reference at %L is out of bounds "
4567 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4568 mpz_get_si (ar
->start
[i
]->value
.integer
),
4569 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4571 gfc_warning (0, "Array reference at %L is out of bounds "
4572 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4573 mpz_get_si (ar
->start
[i
]->value
.integer
),
4574 mpz_get_si (as
->lower
[i
]->value
.integer
),
4578 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4581 gfc_warning (0, "Array reference at %L is out of bounds "
4582 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4583 mpz_get_si (ar
->start
[i
]->value
.integer
),
4584 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4586 gfc_warning (0, "Array reference at %L is out of bounds "
4587 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4588 mpz_get_si (ar
->start
[i
]->value
.integer
),
4589 mpz_get_si (as
->upper
[i
]->value
.integer
),
4598 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4599 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4601 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4603 /* Check for zero stride, which is not allowed. */
4604 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4606 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4610 /* if start == len || (stride > 0 && start < len)
4611 || (stride < 0 && start > len),
4612 then the array section contains at least one element. In this
4613 case, there is an out-of-bounds access if
4614 (start < lower || start > upper). */
4615 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4616 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4617 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4618 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4619 && comp_start_end
== CMP_GT
))
4621 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4623 gfc_warning (0, "Lower array reference at %L is out of bounds "
4624 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4625 mpz_get_si (AR_START
->value
.integer
),
4626 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4629 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4631 gfc_warning (0, "Lower array reference at %L is out of bounds "
4632 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4633 mpz_get_si (AR_START
->value
.integer
),
4634 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4639 /* If we can compute the highest index of the array section,
4640 then it also has to be between lower and upper. */
4641 mpz_init (last_value
);
4642 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4645 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4647 gfc_warning (0, "Upper array reference at %L is out of bounds "
4648 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4649 mpz_get_si (last_value
),
4650 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4651 mpz_clear (last_value
);
4654 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4656 gfc_warning (0, "Upper array reference at %L is out of bounds "
4657 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4658 mpz_get_si (last_value
),
4659 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4660 mpz_clear (last_value
);
4664 mpz_clear (last_value
);
4672 gfc_internal_error ("check_dimension(): Bad array reference");
4679 /* Compare an array reference with an array specification. */
4682 compare_spec_to_ref (gfc_array_ref
*ar
)
4689 /* TODO: Full array sections are only allowed as actual parameters. */
4690 if (as
->type
== AS_ASSUMED_SIZE
4691 && (/*ar->type == AR_FULL
4692 ||*/ (ar
->type
== AR_SECTION
4693 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4695 gfc_error ("Rightmost upper bound of assumed size array section "
4696 "not specified at %L", &ar
->where
);
4700 if (ar
->type
== AR_FULL
)
4703 if (as
->rank
!= ar
->dimen
)
4705 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4706 &ar
->where
, ar
->dimen
, as
->rank
);
4710 /* ar->codimen == 0 is a local array. */
4711 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4713 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4714 &ar
->where
, ar
->codimen
, as
->corank
);
4718 for (i
= 0; i
< as
->rank
; i
++)
4719 if (!check_dimension (i
, ar
, as
))
4722 /* Local access has no coarray spec. */
4723 if (ar
->codimen
!= 0)
4724 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4726 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4727 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4729 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4730 i
+ 1 - as
->rank
, &ar
->where
);
4733 if (!check_dimension (i
, ar
, as
))
4741 /* Resolve one part of an array index. */
4744 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4745 int force_index_integer_kind
)
4752 if (!gfc_resolve_expr (index
))
4755 if (check_scalar
&& index
->rank
!= 0)
4757 gfc_error ("Array index at %L must be scalar", &index
->where
);
4761 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4763 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4764 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4768 if (index
->ts
.type
== BT_REAL
)
4769 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4773 if ((index
->ts
.kind
!= gfc_index_integer_kind
4774 && force_index_integer_kind
)
4775 || index
->ts
.type
!= BT_INTEGER
)
4778 ts
.type
= BT_INTEGER
;
4779 ts
.kind
= gfc_index_integer_kind
;
4781 gfc_convert_type_warn (index
, &ts
, 2, 0);
4787 /* Resolve one part of an array index. */
4790 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4792 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4795 /* Resolve a dim argument to an intrinsic function. */
4798 gfc_resolve_dim_arg (gfc_expr
*dim
)
4803 if (!gfc_resolve_expr (dim
))
4808 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4813 if (dim
->ts
.type
!= BT_INTEGER
)
4815 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4819 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4824 ts
.type
= BT_INTEGER
;
4825 ts
.kind
= gfc_index_integer_kind
;
4827 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4833 /* Given an expression that contains array references, update those array
4834 references to point to the right array specifications. While this is
4835 filled in during matching, this information is difficult to save and load
4836 in a module, so we take care of it here.
4838 The idea here is that the original array reference comes from the
4839 base symbol. We traverse the list of reference structures, setting
4840 the stored reference to references. Component references can
4841 provide an additional array specification. */
4844 find_array_spec (gfc_expr
*e
)
4849 bool class_as
= false;
4851 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4853 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4857 as
= e
->symtree
->n
.sym
->as
;
4859 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4864 gfc_internal_error ("find_array_spec(): Missing spec");
4871 c
= ref
->u
.c
.component
;
4872 if (c
->attr
.dimension
)
4874 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4875 gfc_internal_error ("find_array_spec(): unused as(1)");
4887 gfc_internal_error ("find_array_spec(): unused as(2)");
4891 /* Resolve an array reference. */
4894 resolve_array_ref (gfc_array_ref
*ar
)
4896 int i
, check_scalar
;
4899 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4901 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4903 /* Do not force gfc_index_integer_kind for the start. We can
4904 do fine with any integer kind. This avoids temporary arrays
4905 created for indexing with a vector. */
4906 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4908 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4910 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4915 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4919 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4923 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4924 if (e
->expr_type
== EXPR_VARIABLE
4925 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4926 ar
->start
[i
] = gfc_get_parentheses (e
);
4930 gfc_error ("Array index at %L is an array of rank %d",
4931 &ar
->c_where
[i
], e
->rank
);
4935 /* Fill in the upper bound, which may be lower than the
4936 specified one for something like a(2:10:5), which is
4937 identical to a(2:7:5). Only relevant for strides not equal
4938 to one. Don't try a division by zero. */
4939 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4940 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4941 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4942 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4946 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4948 if (ar
->end
[i
] == NULL
)
4951 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4953 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4955 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4956 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4958 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4969 if (ar
->type
== AR_FULL
)
4971 if (ar
->as
->rank
== 0)
4972 ar
->type
= AR_ELEMENT
;
4974 /* Make sure array is the same as array(:,:), this way
4975 we don't need to special case all the time. */
4976 ar
->dimen
= ar
->as
->rank
;
4977 for (i
= 0; i
< ar
->dimen
; i
++)
4979 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4981 gcc_assert (ar
->start
[i
] == NULL
);
4982 gcc_assert (ar
->end
[i
] == NULL
);
4983 gcc_assert (ar
->stride
[i
] == NULL
);
4987 /* If the reference type is unknown, figure out what kind it is. */
4989 if (ar
->type
== AR_UNKNOWN
)
4991 ar
->type
= AR_ELEMENT
;
4992 for (i
= 0; i
< ar
->dimen
; i
++)
4993 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4994 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4996 ar
->type
= AR_SECTION
;
5001 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
5004 if (ar
->as
->corank
&& ar
->codimen
== 0)
5007 ar
->codimen
= ar
->as
->corank
;
5008 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
5009 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
5017 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
5019 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
5021 if (ref
->u
.ss
.start
!= NULL
)
5023 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
5026 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
5028 gfc_error ("Substring start index at %L must be of type INTEGER",
5029 &ref
->u
.ss
.start
->where
);
5033 if (ref
->u
.ss
.start
->rank
!= 0)
5035 gfc_error ("Substring start index at %L must be scalar",
5036 &ref
->u
.ss
.start
->where
);
5040 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
5041 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5042 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5044 gfc_error ("Substring start index at %L is less than one",
5045 &ref
->u
.ss
.start
->where
);
5050 if (ref
->u
.ss
.end
!= NULL
)
5052 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
5055 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
5057 gfc_error ("Substring end index at %L must be of type INTEGER",
5058 &ref
->u
.ss
.end
->where
);
5062 if (ref
->u
.ss
.end
->rank
!= 0)
5064 gfc_error ("Substring end index at %L must be scalar",
5065 &ref
->u
.ss
.end
->where
);
5069 if (ref
->u
.ss
.length
!= NULL
5070 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5071 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5072 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5074 gfc_error ("Substring end index at %L exceeds the string length",
5075 &ref
->u
.ss
.start
->where
);
5079 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5080 gfc_integer_kinds
[k
].huge
) == CMP_GT
5081 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5082 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5084 gfc_error ("Substring end index at %L is too large",
5085 &ref
->u
.ss
.end
->where
);
5088 /* If the substring has the same length as the original
5089 variable, the reference itself can be deleted. */
5091 if (ref
->u
.ss
.length
!= NULL
5092 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5093 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5094 *equal_length
= true;
5101 /* This function supplies missing substring charlens. */
5104 gfc_resolve_substring_charlen (gfc_expr
*e
)
5107 gfc_expr
*start
, *end
;
5108 gfc_typespec
*ts
= NULL
;
5111 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5113 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5115 if (char_ref
->type
== REF_COMPONENT
)
5116 ts
= &char_ref
->u
.c
.component
->ts
;
5119 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5122 gcc_assert (char_ref
->next
== NULL
);
5126 if (e
->ts
.u
.cl
->length
)
5127 gfc_free_expr (e
->ts
.u
.cl
->length
);
5128 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5132 e
->ts
.type
= BT_CHARACTER
;
5133 e
->ts
.kind
= gfc_default_character_kind
;
5136 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5138 if (char_ref
->u
.ss
.start
)
5139 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5141 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5143 if (char_ref
->u
.ss
.end
)
5144 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5145 else if (e
->expr_type
== EXPR_VARIABLE
)
5148 ts
= &e
->symtree
->n
.sym
->ts
;
5149 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5156 gfc_free_expr (start
);
5157 gfc_free_expr (end
);
5161 /* Length = (end - start + 1).
5162 Check first whether it has a constant length. */
5163 if (gfc_dep_difference (end
, start
, &diff
))
5165 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5168 mpz_add_ui (len
->value
.integer
, diff
, 1);
5170 e
->ts
.u
.cl
->length
= len
;
5171 /* The check for length < 0 is handled below */
5175 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5176 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5177 gfc_get_int_expr (gfc_charlen_int_kind
,
5181 /* F2008, 6.4.1: Both the starting point and the ending point shall
5182 be within the range 1, 2, ..., n unless the starting point exceeds
5183 the ending point, in which case the substring has length zero. */
5185 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5186 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5188 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5189 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5191 /* Make sure that the length is simplified. */
5192 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5193 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5197 /* Resolve subtype references. */
5200 gfc_resolve_ref (gfc_expr
*expr
)
5202 int current_part_dimension
, n_components
, seen_part_dimension
, dim
;
5203 gfc_ref
*ref
, **prev
, *array_ref
;
5206 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5207 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5209 find_array_spec (expr
);
5213 for (prev
= &expr
->ref
; *prev
!= NULL
;
5214 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5215 switch ((*prev
)->type
)
5218 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5227 equal_length
= false;
5228 if (!resolve_substring (*prev
, &equal_length
))
5231 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5233 /* Remove the reference and move the charlen, if any. */
5237 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5238 ref
->u
.ss
.length
= NULL
;
5239 gfc_free_ref_list (ref
);
5244 /* Check constraints on part references. */
5246 current_part_dimension
= 0;
5247 seen_part_dimension
= 0;
5251 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5257 switch (ref
->u
.ar
.type
)
5260 /* Coarray scalar. */
5261 if (ref
->u
.ar
.as
->rank
== 0)
5263 current_part_dimension
= 0;
5268 current_part_dimension
= 1;
5273 current_part_dimension
= 0;
5277 gfc_internal_error ("resolve_ref(): Bad array reference");
5283 if (current_part_dimension
|| seen_part_dimension
)
5286 if (ref
->u
.c
.component
->attr
.pointer
5287 || ref
->u
.c
.component
->attr
.proc_pointer
5288 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5289 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5291 gfc_error ("Component to the right of a part reference "
5292 "with nonzero rank must not have the POINTER "
5293 "attribute at %L", &expr
->where
);
5296 else if (ref
->u
.c
.component
->attr
.allocatable
5297 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5298 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5301 gfc_error ("Component to the right of a part reference "
5302 "with nonzero rank must not have the ALLOCATABLE "
5303 "attribute at %L", &expr
->where
);
5315 /* Implement requirement in note 9.7 of F2018 that the result of the
5316 LEN inquiry be a scalar. */
5317 if (ref
->u
.i
== INQUIRY_LEN
&& array_ref
&& expr
->ts
.deferred
)
5319 array_ref
->u
.ar
.type
= AR_ELEMENT
;
5321 /* INQUIRY_LEN is not evaluated from the rest of the expr
5322 but directly from the string length. This means that setting
5323 the array indices to one does not matter but might trigger
5324 a runtime bounds error. Suppress the check. */
5325 expr
->no_bounds_check
= 1;
5326 for (dim
= 0; dim
< array_ref
->u
.ar
.dimen
; dim
++)
5328 array_ref
->u
.ar
.dimen_type
[dim
] = DIMEN_ELEMENT
;
5329 if (array_ref
->u
.ar
.start
[dim
])
5330 gfc_free_expr (array_ref
->u
.ar
.start
[dim
]);
5331 array_ref
->u
.ar
.start
[dim
]
5332 = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
5333 if (array_ref
->u
.ar
.end
[dim
])
5334 gfc_free_expr (array_ref
->u
.ar
.end
[dim
]);
5335 if (array_ref
->u
.ar
.stride
[dim
])
5336 gfc_free_expr (array_ref
->u
.ar
.stride
[dim
]);
5342 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5343 || ref
->next
== NULL
)
5344 && current_part_dimension
5345 && seen_part_dimension
)
5347 gfc_error ("Two or more part references with nonzero rank must "
5348 "not be specified at %L", &expr
->where
);
5352 if (ref
->type
== REF_COMPONENT
)
5354 if (current_part_dimension
)
5355 seen_part_dimension
= 1;
5357 /* reset to make sure */
5358 current_part_dimension
= 0;
5366 /* Given an expression, determine its shape. This is easier than it sounds.
5367 Leaves the shape array NULL if it is not possible to determine the shape. */
5370 expression_shape (gfc_expr
*e
)
5372 mpz_t array
[GFC_MAX_DIMENSIONS
];
5375 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5378 for (i
= 0; i
< e
->rank
; i
++)
5379 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5382 e
->shape
= gfc_get_shape (e
->rank
);
5384 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5389 for (i
--; i
>= 0; i
--)
5390 mpz_clear (array
[i
]);
5394 /* Given a variable expression node, compute the rank of the expression by
5395 examining the base symbol and any reference structures it may have. */
5398 gfc_expression_rank (gfc_expr
*e
)
5403 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5404 could lead to serious confusion... */
5405 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5409 if (e
->expr_type
== EXPR_ARRAY
)
5411 /* Constructors can have a rank different from one via RESHAPE(). */
5413 e
->rank
= ((e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
)
5414 ? 0 : e
->symtree
->n
.sym
->as
->rank
);
5420 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5422 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5423 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5424 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5426 if (ref
->type
!= REF_ARRAY
)
5429 if (ref
->u
.ar
.type
== AR_FULL
)
5431 rank
= ref
->u
.ar
.as
->rank
;
5435 if (ref
->u
.ar
.type
== AR_SECTION
)
5437 /* Figure out the rank of the section. */
5439 gfc_internal_error ("gfc_expression_rank(): Two array specs");
5441 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5442 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5443 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5453 expression_shape (e
);
5458 add_caf_get_intrinsic (gfc_expr
*e
)
5460 gfc_expr
*wrapper
, *tmp_expr
;
5464 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5465 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5470 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5471 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5474 tmp_expr
= XCNEW (gfc_expr
);
5476 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5477 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5478 wrapper
->ts
= e
->ts
;
5479 wrapper
->rank
= e
->rank
;
5481 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5488 remove_caf_get_intrinsic (gfc_expr
*e
)
5490 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5491 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5492 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5493 e
->value
.function
.actual
->expr
= NULL
;
5494 gfc_free_actual_arglist (e
->value
.function
.actual
);
5495 gfc_free_shape (&e
->shape
, e
->rank
);
5501 /* Resolve a variable expression. */
5504 resolve_variable (gfc_expr
*e
)
5511 if (e
->symtree
== NULL
)
5513 sym
= e
->symtree
->n
.sym
;
5515 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5516 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5517 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5519 if (!actual_arg
|| inquiry_argument
)
5521 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5522 "be used as actual argument", sym
->name
, &e
->where
);
5526 /* TS 29113, 407b. */
5527 else if (e
->ts
.type
== BT_ASSUMED
)
5531 gfc_error ("Assumed-type variable %s at %L may only be used "
5532 "as actual argument", sym
->name
, &e
->where
);
5535 else if (inquiry_argument
&& !first_actual_arg
)
5537 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5538 for all inquiry functions in resolve_function; the reason is
5539 that the function-name resolution happens too late in that
5541 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5542 "an inquiry function shall be the first argument",
5543 sym
->name
, &e
->where
);
5547 /* TS 29113, C535b. */
5548 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5549 && CLASS_DATA (sym
)->as
5550 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5551 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5552 && sym
->as
->type
== AS_ASSUMED_RANK
))
5553 && !sym
->attr
.select_rank_temporary
)
5556 && !(cs_base
&& cs_base
->current
5557 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5559 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5560 "actual argument", sym
->name
, &e
->where
);
5563 else if (inquiry_argument
&& !first_actual_arg
)
5565 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5566 for all inquiry functions in resolve_function; the reason is
5567 that the function-name resolution happens too late in that
5569 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5570 "to an inquiry function shall be the first argument",
5571 sym
->name
, &e
->where
);
5576 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5577 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5578 && e
->ref
->next
== NULL
))
5580 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5581 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5584 /* TS 29113, 407b. */
5585 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5586 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5587 && e
->ref
->next
== NULL
))
5589 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5590 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5594 /* TS 29113, C535b. */
5595 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5596 && CLASS_DATA (sym
)->as
5597 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5598 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5599 && sym
->as
->type
== AS_ASSUMED_RANK
))
5601 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5602 && e
->ref
->next
== NULL
))
5604 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5605 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5609 /* For variables that are used in an associate (target => object) where
5610 the object's basetype is array valued while the target is scalar,
5611 the ts' type of the component refs is still array valued, which
5612 can't be translated that way. */
5613 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5614 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5615 && CLASS_DATA (sym
->assoc
->target
)->as
)
5617 gfc_ref
*ref
= e
->ref
;
5623 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5624 /* Stop the loop. */
5634 /* If this is an associate-name, it may be parsed with an array reference
5635 in error even though the target is scalar. Fail directly in this case.
5636 TODO Understand why class scalar expressions must be excluded. */
5637 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5639 if (sym
->ts
.type
== BT_CLASS
)
5640 gfc_fix_class_refs (e
);
5641 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5643 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5645 /* This can happen because the parser did not detect that the
5646 associate name is an array and the expression had no array
5648 gfc_ref
*ref
= gfc_get_ref ();
5649 ref
->type
= REF_ARRAY
;
5650 ref
->u
.ar
= *gfc_get_array_ref();
5651 ref
->u
.ar
.type
= AR_FULL
;
5654 ref
->u
.ar
.as
= sym
->as
;
5655 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5663 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5664 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5666 /* On the other hand, the parser may not have known this is an array;
5667 in this case, we have to add a FULL reference. */
5668 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5670 e
->ref
= gfc_get_ref ();
5671 e
->ref
->type
= REF_ARRAY
;
5672 e
->ref
->u
.ar
.type
= AR_FULL
;
5673 e
->ref
->u
.ar
.dimen
= 0;
5676 /* Like above, but for class types, where the checking whether an array
5677 ref is present is more complicated. Furthermore make sure not to add
5678 the full array ref to _vptr or _len refs. */
5679 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5680 && CLASS_DATA (sym
)->attr
.dimension
5681 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5683 gfc_ref
*ref
, *newref
;
5685 newref
= gfc_get_ref ();
5686 newref
->type
= REF_ARRAY
;
5687 newref
->u
.ar
.type
= AR_FULL
;
5688 newref
->u
.ar
.dimen
= 0;
5689 /* Because this is an associate var and the first ref either is a ref to
5690 the _data component or not, no traversal of the ref chain is
5691 needed. The array ref needs to be inserted after the _data ref,
5692 or when that is not present, which may happend for polymorphic
5693 types, then at the first position. */
5697 else if (ref
->type
== REF_COMPONENT
5698 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5700 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5702 newref
->next
= ref
->next
;
5706 /* Array ref present already. */
5707 gfc_free_ref_list (newref
);
5709 else if (ref
->type
== REF_ARRAY
)
5710 /* Array ref present already. */
5711 gfc_free_ref_list (newref
);
5719 if (e
->ref
&& !gfc_resolve_ref (e
))
5722 if (sym
->attr
.flavor
== FL_PROCEDURE
5723 && (!sym
->attr
.function
5724 || (sym
->attr
.function
&& sym
->result
5725 && sym
->result
->attr
.proc_pointer
5726 && !sym
->result
->attr
.function
)))
5728 e
->ts
.type
= BT_PROCEDURE
;
5729 goto resolve_procedure
;
5732 if (sym
->ts
.type
!= BT_UNKNOWN
)
5733 gfc_variable_attr (e
, &e
->ts
);
5734 else if (sym
->attr
.flavor
== FL_PROCEDURE
5735 && sym
->attr
.function
&& sym
->result
5736 && sym
->result
->ts
.type
!= BT_UNKNOWN
5737 && sym
->result
->attr
.proc_pointer
)
5738 e
->ts
= sym
->result
->ts
;
5741 /* Must be a simple variable reference. */
5742 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5747 if (check_assumed_size_reference (sym
, e
))
5750 /* Deal with forward references to entries during gfc_resolve_code, to
5751 satisfy, at least partially, 12.5.2.5. */
5752 if (gfc_current_ns
->entries
5753 && current_entry_id
== sym
->entry_id
5756 && cs_base
->current
->op
!= EXEC_ENTRY
)
5758 gfc_entry_list
*entry
;
5759 gfc_formal_arglist
*formal
;
5761 bool seen
, saved_specification_expr
;
5763 /* If the symbol is a dummy... */
5764 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5766 entry
= gfc_current_ns
->entries
;
5769 /* ...test if the symbol is a parameter of previous entries. */
5770 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5771 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5773 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5780 /* If it has not been seen as a dummy, this is an error. */
5783 if (specification_expr
)
5784 gfc_error ("Variable %qs, used in a specification expression"
5785 ", is referenced at %L before the ENTRY statement "
5786 "in which it is a parameter",
5787 sym
->name
, &cs_base
->current
->loc
);
5789 gfc_error ("Variable %qs is used at %L before the ENTRY "
5790 "statement in which it is a parameter",
5791 sym
->name
, &cs_base
->current
->loc
);
5796 /* Now do the same check on the specification expressions. */
5797 saved_specification_expr
= specification_expr
;
5798 specification_expr
= true;
5799 if (sym
->ts
.type
== BT_CHARACTER
5800 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5804 for (n
= 0; n
< sym
->as
->rank
; n
++)
5806 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5808 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5811 specification_expr
= saved_specification_expr
;
5814 /* Update the symbol's entry level. */
5815 sym
->entry_id
= current_entry_id
+ 1;
5818 /* If a symbol has been host_associated mark it. This is used latter,
5819 to identify if aliasing is possible via host association. */
5820 if (sym
->attr
.flavor
== FL_VARIABLE
5821 && gfc_current_ns
->parent
5822 && (gfc_current_ns
->parent
== sym
->ns
5823 || (gfc_current_ns
->parent
->parent
5824 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5825 sym
->attr
.host_assoc
= 1;
5827 if (gfc_current_ns
->proc_name
5828 && sym
->attr
.dimension
5829 && (sym
->ns
!= gfc_current_ns
5830 || sym
->attr
.use_assoc
5831 || sym
->attr
.in_common
))
5832 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5835 if (t
&& !resolve_procedure_expression (e
))
5838 /* F2008, C617 and C1229. */
5839 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5840 && gfc_is_coindexed (e
))
5842 gfc_ref
*ref
, *ref2
= NULL
;
5844 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5846 if (ref
->type
== REF_COMPONENT
)
5848 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5852 for ( ; ref
; ref
= ref
->next
)
5853 if (ref
->type
== REF_COMPONENT
)
5856 /* Expression itself is not coindexed object. */
5857 if (ref
&& e
->ts
.type
== BT_CLASS
)
5859 gfc_error ("Polymorphic subobject of coindexed object at %L",
5864 /* Expression itself is coindexed object. */
5868 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5869 for ( ; c
; c
= c
->next
)
5870 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5872 gfc_error ("Coindexed object with polymorphic allocatable "
5873 "subcomponent at %L", &e
->where
);
5881 gfc_expression_rank (e
);
5883 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5884 add_caf_get_intrinsic (e
);
5886 /* Simplify cases where access to a parameter array results in a
5887 single constant. Suppress errors since those will have been
5888 issued before, as warnings. */
5889 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5891 gfc_push_suppress_errors ();
5892 gfc_simplify_expr (e
, 1);
5893 gfc_pop_suppress_errors ();
5900 /* Checks to see that the correct symbol has been host associated.
5901 The only situation where this arises is that in which a twice
5902 contained function is parsed after the host association is made.
5903 Therefore, on detecting this, change the symbol in the expression
5904 and convert the array reference into an actual arglist if the old
5905 symbol is a variable. */
5907 check_host_association (gfc_expr
*e
)
5909 gfc_symbol
*sym
, *old_sym
;
5913 gfc_actual_arglist
*arg
, *tail
= NULL
;
5914 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5916 /* If the expression is the result of substitution in
5917 interface.c(gfc_extend_expr) because there is no way in
5918 which the host association can be wrong. */
5919 if (e
->symtree
== NULL
5920 || e
->symtree
->n
.sym
== NULL
5921 || e
->user_operator
)
5924 old_sym
= e
->symtree
->n
.sym
;
5926 if (gfc_current_ns
->parent
5927 && old_sym
->ns
!= gfc_current_ns
)
5929 /* Use the 'USE' name so that renamed module symbols are
5930 correctly handled. */
5931 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5933 if (sym
&& old_sym
!= sym
5934 && sym
->ts
.type
== old_sym
->ts
.type
5935 && sym
->attr
.flavor
== FL_PROCEDURE
5936 && sym
->attr
.contained
)
5938 /* Clear the shape, since it might not be valid. */
5939 gfc_free_shape (&e
->shape
, e
->rank
);
5941 /* Give the expression the right symtree! */
5942 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5943 gcc_assert (st
!= NULL
);
5945 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5946 || e
->expr_type
== EXPR_FUNCTION
)
5948 /* Original was function so point to the new symbol, since
5949 the actual argument list is already attached to the
5951 e
->value
.function
.esym
= NULL
;
5956 /* Original was variable so convert array references into
5957 an actual arglist. This does not need any checking now
5958 since resolve_function will take care of it. */
5959 e
->value
.function
.actual
= NULL
;
5960 e
->expr_type
= EXPR_FUNCTION
;
5963 /* Ambiguity will not arise if the array reference is not
5964 the last reference. */
5965 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5966 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5969 gcc_assert (ref
->type
== REF_ARRAY
);
5971 /* Grab the start expressions from the array ref and
5972 copy them into actual arguments. */
5973 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5975 arg
= gfc_get_actual_arglist ();
5976 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5977 if (e
->value
.function
.actual
== NULL
)
5978 tail
= e
->value
.function
.actual
= arg
;
5986 /* Dump the reference list and set the rank. */
5987 gfc_free_ref_list (e
->ref
);
5989 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5992 gfc_resolve_expr (e
);
5996 /* This might have changed! */
5997 return e
->expr_type
== EXPR_FUNCTION
;
6002 gfc_resolve_character_operator (gfc_expr
*e
)
6004 gfc_expr
*op1
= e
->value
.op
.op1
;
6005 gfc_expr
*op2
= e
->value
.op
.op2
;
6006 gfc_expr
*e1
= NULL
;
6007 gfc_expr
*e2
= NULL
;
6009 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
6011 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
6012 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
6013 else if (op1
->expr_type
== EXPR_CONSTANT
)
6014 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6015 op1
->value
.character
.length
);
6017 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
6018 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
6019 else if (op2
->expr_type
== EXPR_CONSTANT
)
6020 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
6021 op2
->value
.character
.length
);
6023 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6033 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
6034 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
6035 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
6036 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
6037 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
6043 /* Ensure that an character expression has a charlen and, if possible, a
6044 length expression. */
6047 fixup_charlen (gfc_expr
*e
)
6049 /* The cases fall through so that changes in expression type and the need
6050 for multiple fixes are picked up. In all circumstances, a charlen should
6051 be available for the middle end to hang a backend_decl on. */
6052 switch (e
->expr_type
)
6055 gfc_resolve_character_operator (e
);
6059 if (e
->expr_type
== EXPR_ARRAY
)
6060 gfc_resolve_character_array_constructor (e
);
6063 case EXPR_SUBSTRING
:
6064 if (!e
->ts
.u
.cl
&& e
->ref
)
6065 gfc_resolve_substring_charlen (e
);
6070 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
6077 /* Update an actual argument to include the passed-object for type-bound
6078 procedures at the right position. */
6080 static gfc_actual_arglist
*
6081 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
6084 gcc_assert (argpos
> 0);
6088 gfc_actual_arglist
* result
;
6090 result
= gfc_get_actual_arglist ();
6094 result
->name
= name
;
6100 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6102 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6107 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6110 extract_compcall_passed_object (gfc_expr
* e
)
6114 if (e
->expr_type
== EXPR_UNKNOWN
)
6116 gfc_error ("Error in typebound call at %L",
6121 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6123 if (e
->value
.compcall
.base_object
)
6124 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6127 po
= gfc_get_expr ();
6128 po
->expr_type
= EXPR_VARIABLE
;
6129 po
->symtree
= e
->symtree
;
6130 po
->ref
= gfc_copy_ref (e
->ref
);
6131 po
->where
= e
->where
;
6134 if (!gfc_resolve_expr (po
))
6141 /* Update the arglist of an EXPR_COMPCALL expression to include the
6145 update_compcall_arglist (gfc_expr
* e
)
6148 gfc_typebound_proc
* tbp
;
6150 tbp
= e
->value
.compcall
.tbp
;
6155 po
= extract_compcall_passed_object (e
);
6159 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6165 if (tbp
->pass_arg_num
<= 0)
6168 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6176 /* Extract the passed object from a PPC call (a copy of it). */
6179 extract_ppc_passed_object (gfc_expr
*e
)
6184 po
= gfc_get_expr ();
6185 po
->expr_type
= EXPR_VARIABLE
;
6186 po
->symtree
= e
->symtree
;
6187 po
->ref
= gfc_copy_ref (e
->ref
);
6188 po
->where
= e
->where
;
6190 /* Remove PPC reference. */
6192 while ((*ref
)->next
)
6193 ref
= &(*ref
)->next
;
6194 gfc_free_ref_list (*ref
);
6197 if (!gfc_resolve_expr (po
))
6204 /* Update the actual arglist of a procedure pointer component to include the
6208 update_ppc_arglist (gfc_expr
* e
)
6212 gfc_typebound_proc
* tb
;
6214 ppc
= gfc_get_proc_ptr_comp (e
);
6222 else if (tb
->nopass
)
6225 po
= extract_ppc_passed_object (e
);
6232 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6237 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6239 gfc_error ("Base object for procedure-pointer component call at %L is of"
6240 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6244 gcc_assert (tb
->pass_arg_num
> 0);
6245 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6253 /* Check that the object a TBP is called on is valid, i.e. it must not be
6254 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6257 check_typebound_baseobject (gfc_expr
* e
)
6260 bool return_value
= false;
6262 base
= extract_compcall_passed_object (e
);
6266 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6268 gfc_error ("Error in typebound call at %L", &e
->where
);
6272 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6276 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6278 gfc_error ("Base object for type-bound procedure call at %L is of"
6279 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6283 /* F08:C1230. If the procedure called is NOPASS,
6284 the base object must be scalar. */
6285 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6287 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6288 " be scalar", &e
->where
);
6292 return_value
= true;
6295 gfc_free_expr (base
);
6296 return return_value
;
6300 /* Resolve a call to a type-bound procedure, either function or subroutine,
6301 statically from the data in an EXPR_COMPCALL expression. The adapted
6302 arglist and the target-procedure symtree are returned. */
6305 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6306 gfc_actual_arglist
** actual
)
6308 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6309 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6311 /* Update the actual arglist for PASS. */
6312 if (!update_compcall_arglist (e
))
6315 *actual
= e
->value
.compcall
.actual
;
6316 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6318 gfc_free_ref_list (e
->ref
);
6320 e
->value
.compcall
.actual
= NULL
;
6322 /* If we find a deferred typebound procedure, check for derived types
6323 that an overriding typebound procedure has not been missed. */
6324 if (e
->value
.compcall
.name
6325 && !e
->value
.compcall
.tbp
->non_overridable
6326 && e
->value
.compcall
.base_object
6327 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6330 gfc_symbol
*derived
;
6332 /* Use the derived type of the base_object. */
6333 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6336 /* If necessary, go through the inheritance chain. */
6337 while (!st
&& derived
)
6339 /* Look for the typebound procedure 'name'. */
6340 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6341 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6342 e
->value
.compcall
.name
);
6344 derived
= gfc_get_derived_super_type (derived
);
6347 /* Now find the specific name in the derived type namespace. */
6348 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6349 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6350 derived
->ns
, 1, &st
);
6358 /* Get the ultimate declared type from an expression. In addition,
6359 return the last class/derived type reference and the copy of the
6360 reference list. If check_types is set true, derived types are
6361 identified as well as class references. */
6363 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6364 gfc_expr
*e
, bool check_types
)
6366 gfc_symbol
*declared
;
6373 *new_ref
= gfc_copy_ref (e
->ref
);
6375 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6377 if (ref
->type
!= REF_COMPONENT
)
6380 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6381 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6382 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6384 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6390 if (declared
== NULL
)
6391 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6397 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6398 which of the specific bindings (if any) matches the arglist and transform
6399 the expression into a call of that binding. */
6402 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6404 gfc_typebound_proc
* genproc
;
6405 const char* genname
;
6407 gfc_symbol
*derived
;
6409 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6410 genname
= e
->value
.compcall
.name
;
6411 genproc
= e
->value
.compcall
.tbp
;
6413 if (!genproc
->is_generic
)
6416 /* Try the bindings on this type and in the inheritance hierarchy. */
6417 for (; genproc
; genproc
= genproc
->overridden
)
6421 gcc_assert (genproc
->is_generic
);
6422 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6425 gfc_actual_arglist
* args
;
6428 gcc_assert (g
->specific
);
6430 if (g
->specific
->error
)
6433 target
= g
->specific
->u
.specific
->n
.sym
;
6435 /* Get the right arglist by handling PASS/NOPASS. */
6436 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6437 if (!g
->specific
->nopass
)
6440 po
= extract_compcall_passed_object (e
);
6443 gfc_free_actual_arglist (args
);
6447 gcc_assert (g
->specific
->pass_arg_num
> 0);
6448 gcc_assert (!g
->specific
->error
);
6449 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6450 g
->specific
->pass_arg
);
6452 resolve_actual_arglist (args
, target
->attr
.proc
,
6453 is_external_proc (target
)
6454 && gfc_sym_get_dummy_args (target
) == NULL
);
6456 /* Check if this arglist matches the formal. */
6457 matches
= gfc_arglist_matches_symbol (&args
, target
);
6459 /* Clean up and break out of the loop if we've found it. */
6460 gfc_free_actual_arglist (args
);
6463 e
->value
.compcall
.tbp
= g
->specific
;
6464 genname
= g
->specific_st
->name
;
6465 /* Pass along the name for CLASS methods, where the vtab
6466 procedure pointer component has to be referenced. */
6474 /* Nothing matching found! */
6475 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6476 " %qs at %L", genname
, &e
->where
);
6480 /* Make sure that we have the right specific instance for the name. */
6481 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6483 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6485 e
->value
.compcall
.tbp
= st
->n
.tb
;
6491 /* Resolve a call to a type-bound subroutine. */
6494 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6496 gfc_actual_arglist
* newactual
;
6497 gfc_symtree
* target
;
6499 /* Check that's really a SUBROUTINE. */
6500 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6502 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6503 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6504 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6505 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6506 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6509 gfc_error ("%qs at %L should be a SUBROUTINE",
6510 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6515 if (!check_typebound_baseobject (c
->expr1
))
6518 /* Pass along the name for CLASS methods, where the vtab
6519 procedure pointer component has to be referenced. */
6521 *name
= c
->expr1
->value
.compcall
.name
;
6523 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6526 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6528 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6530 /* Transform into an ordinary EXEC_CALL for now. */
6532 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6535 c
->ext
.actual
= newactual
;
6536 c
->symtree
= target
;
6537 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6539 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6541 gfc_free_expr (c
->expr1
);
6542 c
->expr1
= gfc_get_expr ();
6543 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6544 c
->expr1
->symtree
= target
;
6545 c
->expr1
->where
= c
->loc
;
6547 return resolve_call (c
);
6551 /* Resolve a component-call expression. */
6553 resolve_compcall (gfc_expr
* e
, const char **name
)
6555 gfc_actual_arglist
* newactual
;
6556 gfc_symtree
* target
;
6558 /* Check that's really a FUNCTION. */
6559 if (!e
->value
.compcall
.tbp
->function
)
6561 gfc_error ("%qs at %L should be a FUNCTION",
6562 e
->value
.compcall
.name
, &e
->where
);
6567 /* These must not be assign-calls! */
6568 gcc_assert (!e
->value
.compcall
.assign
);
6570 if (!check_typebound_baseobject (e
))
6573 /* Pass along the name for CLASS methods, where the vtab
6574 procedure pointer component has to be referenced. */
6576 *name
= e
->value
.compcall
.name
;
6578 if (!resolve_typebound_generic_call (e
, name
))
6580 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6582 /* Take the rank from the function's symbol. */
6583 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6584 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6586 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6587 arglist to the TBP's binding target. */
6589 if (!resolve_typebound_static (e
, &target
, &newactual
))
6592 e
->value
.function
.actual
= newactual
;
6593 e
->value
.function
.name
= NULL
;
6594 e
->value
.function
.esym
= target
->n
.sym
;
6595 e
->value
.function
.isym
= NULL
;
6596 e
->symtree
= target
;
6597 e
->ts
= target
->n
.sym
->ts
;
6598 e
->expr_type
= EXPR_FUNCTION
;
6600 /* Resolution is not necessary if this is a class subroutine; this
6601 function only has to identify the specific proc. Resolution of
6602 the call will be done next in resolve_typebound_call. */
6603 return gfc_resolve_expr (e
);
6607 static bool resolve_fl_derived (gfc_symbol
*sym
);
6610 /* Resolve a typebound function, or 'method'. First separate all
6611 the non-CLASS references by calling resolve_compcall directly. */
6614 resolve_typebound_function (gfc_expr
* e
)
6616 gfc_symbol
*declared
;
6628 /* Deal with typebound operators for CLASS objects. */
6629 expr
= e
->value
.compcall
.base_object
;
6630 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6631 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6633 /* Since the typebound operators are generic, we have to ensure
6634 that any delays in resolution are corrected and that the vtab
6637 declared
= ts
.u
.derived
;
6638 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6639 if (c
->ts
.u
.derived
== NULL
)
6640 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6642 if (!resolve_compcall (e
, &name
))
6645 /* Use the generic name if it is there. */
6646 name
= name
? name
: e
->value
.function
.esym
->name
;
6647 e
->symtree
= expr
->symtree
;
6648 e
->ref
= gfc_copy_ref (expr
->ref
);
6649 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6651 /* Trim away the extraneous references that emerge from nested
6652 use of interface.c (extend_expr). */
6653 if (class_ref
&& class_ref
->next
)
6655 gfc_free_ref_list (class_ref
->next
);
6656 class_ref
->next
= NULL
;
6658 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6660 gfc_free_ref_list (e
->ref
);
6664 gfc_add_vptr_component (e
);
6665 gfc_add_component_ref (e
, name
);
6666 e
->value
.function
.esym
= NULL
;
6667 if (expr
->expr_type
!= EXPR_VARIABLE
)
6668 e
->base_expr
= expr
;
6673 return resolve_compcall (e
, NULL
);
6675 if (!gfc_resolve_ref (e
))
6678 /* Get the CLASS declared type. */
6679 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6681 if (!resolve_fl_derived (declared
))
6684 /* Weed out cases of the ultimate component being a derived type. */
6685 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6686 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6688 gfc_free_ref_list (new_ref
);
6689 return resolve_compcall (e
, NULL
);
6692 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6694 /* Treat the call as if it is a typebound procedure, in order to roll
6695 out the correct name for the specific function. */
6696 if (!resolve_compcall (e
, &name
))
6698 gfc_free_ref_list (new_ref
);
6705 /* Convert the expression to a procedure pointer component call. */
6706 e
->value
.function
.esym
= NULL
;
6712 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6713 gfc_add_vptr_component (e
);
6714 gfc_add_component_ref (e
, name
);
6716 /* Recover the typespec for the expression. This is really only
6717 necessary for generic procedures, where the additional call
6718 to gfc_add_component_ref seems to throw the collection of the
6719 correct typespec. */
6723 gfc_free_ref_list (new_ref
);
6728 /* Resolve a typebound subroutine, or 'method'. First separate all
6729 the non-CLASS references by calling resolve_typebound_call
6733 resolve_typebound_subroutine (gfc_code
*code
)
6735 gfc_symbol
*declared
;
6745 st
= code
->expr1
->symtree
;
6747 /* Deal with typebound operators for CLASS objects. */
6748 expr
= code
->expr1
->value
.compcall
.base_object
;
6749 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6750 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6752 /* If the base_object is not a variable, the corresponding actual
6753 argument expression must be stored in e->base_expression so
6754 that the corresponding tree temporary can be used as the base
6755 object in gfc_conv_procedure_call. */
6756 if (expr
->expr_type
!= EXPR_VARIABLE
)
6758 gfc_actual_arglist
*args
;
6760 args
= code
->expr1
->value
.function
.actual
;
6761 for (; args
; args
= args
->next
)
6762 if (expr
== args
->expr
)
6766 /* Since the typebound operators are generic, we have to ensure
6767 that any delays in resolution are corrected and that the vtab
6769 declared
= expr
->ts
.u
.derived
;
6770 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6771 if (c
->ts
.u
.derived
== NULL
)
6772 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6774 if (!resolve_typebound_call (code
, &name
, NULL
))
6777 /* Use the generic name if it is there. */
6778 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6779 code
->expr1
->symtree
= expr
->symtree
;
6780 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6782 /* Trim away the extraneous references that emerge from nested
6783 use of interface.c (extend_expr). */
6784 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6785 if (class_ref
&& class_ref
->next
)
6787 gfc_free_ref_list (class_ref
->next
);
6788 class_ref
->next
= NULL
;
6790 else if (code
->expr1
->ref
&& !class_ref
)
6792 gfc_free_ref_list (code
->expr1
->ref
);
6793 code
->expr1
->ref
= NULL
;
6796 /* Now use the procedure in the vtable. */
6797 gfc_add_vptr_component (code
->expr1
);
6798 gfc_add_component_ref (code
->expr1
, name
);
6799 code
->expr1
->value
.function
.esym
= NULL
;
6800 if (expr
->expr_type
!= EXPR_VARIABLE
)
6801 code
->expr1
->base_expr
= expr
;
6806 return resolve_typebound_call (code
, NULL
, NULL
);
6808 if (!gfc_resolve_ref (code
->expr1
))
6811 /* Get the CLASS declared type. */
6812 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6814 /* Weed out cases of the ultimate component being a derived type. */
6815 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6816 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6818 gfc_free_ref_list (new_ref
);
6819 return resolve_typebound_call (code
, NULL
, NULL
);
6822 if (!resolve_typebound_call (code
, &name
, &overridable
))
6824 gfc_free_ref_list (new_ref
);
6827 ts
= code
->expr1
->ts
;
6831 /* Convert the expression to a procedure pointer component call. */
6832 code
->expr1
->value
.function
.esym
= NULL
;
6833 code
->expr1
->symtree
= st
;
6836 code
->expr1
->ref
= new_ref
;
6838 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6839 gfc_add_vptr_component (code
->expr1
);
6840 gfc_add_component_ref (code
->expr1
, name
);
6842 /* Recover the typespec for the expression. This is really only
6843 necessary for generic procedures, where the additional call
6844 to gfc_add_component_ref seems to throw the collection of the
6845 correct typespec. */
6846 code
->expr1
->ts
= ts
;
6849 gfc_free_ref_list (new_ref
);
6855 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6858 resolve_ppc_call (gfc_code
* c
)
6860 gfc_component
*comp
;
6862 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6863 gcc_assert (comp
!= NULL
);
6865 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6866 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6868 if (!comp
->attr
.subroutine
)
6869 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6871 if (!gfc_resolve_ref (c
->expr1
))
6874 if (!update_ppc_arglist (c
->expr1
))
6877 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6879 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6880 !(comp
->ts
.interface
6881 && comp
->ts
.interface
->formal
)))
6884 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6887 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6893 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6896 resolve_expr_ppc (gfc_expr
* e
)
6898 gfc_component
*comp
;
6900 comp
= gfc_get_proc_ptr_comp (e
);
6901 gcc_assert (comp
!= NULL
);
6903 /* Convert to EXPR_FUNCTION. */
6904 e
->expr_type
= EXPR_FUNCTION
;
6905 e
->value
.function
.isym
= NULL
;
6906 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6908 if (comp
->as
!= NULL
)
6909 e
->rank
= comp
->as
->rank
;
6911 if (!comp
->attr
.function
)
6912 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6914 if (!gfc_resolve_ref (e
))
6917 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6918 !(comp
->ts
.interface
6919 && comp
->ts
.interface
->formal
)))
6922 if (!update_ppc_arglist (e
))
6925 if (!check_pure_function(e
))
6928 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6935 gfc_is_expandable_expr (gfc_expr
*e
)
6937 gfc_constructor
*con
;
6939 if (e
->expr_type
== EXPR_ARRAY
)
6941 /* Traverse the constructor looking for variables that are flavor
6942 parameter. Parameters must be expanded since they are fully used at
6944 con
= gfc_constructor_first (e
->value
.constructor
);
6945 for (; con
; con
= gfc_constructor_next (con
))
6947 if (con
->expr
->expr_type
== EXPR_VARIABLE
6948 && con
->expr
->symtree
6949 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6950 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6952 if (con
->expr
->expr_type
== EXPR_ARRAY
6953 && gfc_is_expandable_expr (con
->expr
))
6962 /* Sometimes variables in specification expressions of the result
6963 of module procedures in submodules wind up not being the 'real'
6964 dummy. Find this, if possible, in the namespace of the first
6968 fixup_unique_dummy (gfc_expr
*e
)
6970 gfc_symtree
*st
= NULL
;
6971 gfc_symbol
*s
= NULL
;
6973 if (e
->symtree
->n
.sym
->ns
->proc_name
6974 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6975 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6978 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6981 && st
->n
.sym
!= NULL
6982 && st
->n
.sym
->attr
.dummy
)
6986 /* Resolve an expression. That is, make sure that types of operands agree
6987 with their operators, intrinsic operators are converted to function calls
6988 for overloaded types and unresolved function references are resolved. */
6991 gfc_resolve_expr (gfc_expr
*e
)
6994 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6996 if (e
== NULL
|| e
->do_not_resolve_again
)
6999 /* inquiry_argument only applies to variables. */
7000 inquiry_save
= inquiry_argument
;
7001 actual_arg_save
= actual_arg
;
7002 first_actual_arg_save
= first_actual_arg
;
7004 if (e
->expr_type
!= EXPR_VARIABLE
)
7006 inquiry_argument
= false;
7008 first_actual_arg
= false;
7010 else if (e
->symtree
!= NULL
7011 && *e
->symtree
->name
== '@'
7012 && e
->symtree
->n
.sym
->attr
.dummy
)
7014 /* Deal with submodule specification expressions that are not
7015 found to be referenced in module.c(read_cleanup). */
7016 fixup_unique_dummy (e
);
7019 switch (e
->expr_type
)
7022 t
= resolve_operator (e
);
7028 if (check_host_association (e
))
7029 t
= resolve_function (e
);
7031 t
= resolve_variable (e
);
7033 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
7034 && e
->ref
->type
!= REF_SUBSTRING
)
7035 gfc_resolve_substring_charlen (e
);
7040 t
= resolve_typebound_function (e
);
7043 case EXPR_SUBSTRING
:
7044 t
= gfc_resolve_ref (e
);
7053 t
= resolve_expr_ppc (e
);
7058 if (!gfc_resolve_ref (e
))
7061 t
= gfc_resolve_array_constructor (e
);
7062 /* Also try to expand a constructor. */
7065 gfc_expression_rank (e
);
7066 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
7067 gfc_expand_constructor (e
, false);
7070 /* This provides the opportunity for the length of constructors with
7071 character valued function elements to propagate the string length
7072 to the expression. */
7073 if (t
&& e
->ts
.type
== BT_CHARACTER
)
7075 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
7076 here rather then add a duplicate test for it above. */
7077 gfc_expand_constructor (e
, false);
7078 t
= gfc_resolve_character_array_constructor (e
);
7083 case EXPR_STRUCTURE
:
7084 t
= gfc_resolve_ref (e
);
7088 t
= resolve_structure_cons (e
, 0);
7092 t
= gfc_simplify_expr (e
, 0);
7096 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7099 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7102 inquiry_argument
= inquiry_save
;
7103 actual_arg
= actual_arg_save
;
7104 first_actual_arg
= first_actual_arg_save
;
7106 /* For some reason, resolving these expressions a second time mangles
7107 the typespec of the expression itself. */
7108 if (t
&& e
->expr_type
== EXPR_VARIABLE
7109 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7110 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7111 e
->do_not_resolve_again
= 1;
7117 /* Resolve an expression from an iterator. They must be scalar and have
7118 INTEGER or (optionally) REAL type. */
7121 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7122 const char *name_msgid
)
7124 if (!gfc_resolve_expr (expr
))
7127 if (expr
->rank
!= 0)
7129 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7133 if (expr
->ts
.type
!= BT_INTEGER
)
7135 if (expr
->ts
.type
== BT_REAL
)
7138 return gfc_notify_std (GFC_STD_F95_DEL
,
7139 "%s at %L must be integer",
7140 _(name_msgid
), &expr
->where
);
7143 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7150 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7158 /* Resolve the expressions in an iterator structure. If REAL_OK is
7159 false allow only INTEGER type iterators, otherwise allow REAL types.
7160 Set own_scope to true for ac-implied-do and data-implied-do as those
7161 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7164 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7166 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7169 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7170 _("iterator variable")))
7173 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7174 "Start expression in DO loop"))
7177 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7178 "End expression in DO loop"))
7181 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7182 "Step expression in DO loop"))
7185 /* Convert start, end, and step to the same type as var. */
7186 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7187 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7188 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7190 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7191 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7192 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7194 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7195 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7196 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7198 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7200 if ((iter
->step
->ts
.type
== BT_INTEGER
7201 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7202 || (iter
->step
->ts
.type
== BT_REAL
7203 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7205 gfc_error ("Step expression in DO loop at %L cannot be zero",
7206 &iter
->step
->where
);
7211 if (iter
->start
->expr_type
== EXPR_CONSTANT
7212 && iter
->end
->expr_type
== EXPR_CONSTANT
7213 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7216 if (iter
->start
->ts
.type
== BT_INTEGER
)
7218 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7219 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7223 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7224 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7226 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7227 gfc_warning (OPT_Wzerotrip
,
7228 "DO loop at %L will be executed zero times",
7229 &iter
->step
->where
);
7232 if (iter
->end
->expr_type
== EXPR_CONSTANT
7233 && iter
->end
->ts
.type
== BT_INTEGER
7234 && iter
->step
->expr_type
== EXPR_CONSTANT
7235 && iter
->step
->ts
.type
== BT_INTEGER
7236 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7237 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7239 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7240 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7242 if (is_step_positive
7243 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7244 gfc_warning (OPT_Wundefined_do_loop
,
7245 "DO loop at %L is undefined as it overflows",
7246 &iter
->step
->where
);
7247 else if (!is_step_positive
7248 && mpz_cmp (iter
->end
->value
.integer
,
7249 gfc_integer_kinds
[k
].min_int
) == 0)
7250 gfc_warning (OPT_Wundefined_do_loop
,
7251 "DO loop at %L is undefined as it underflows",
7252 &iter
->step
->where
);
7259 /* Traversal function for find_forall_index. f == 2 signals that
7260 that variable itself is not to be checked - only the references. */
7263 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7265 if (expr
->expr_type
!= EXPR_VARIABLE
)
7268 /* A scalar assignment */
7269 if (!expr
->ref
|| *f
== 1)
7271 if (expr
->symtree
->n
.sym
== sym
)
7283 /* Check whether the FORALL index appears in the expression or not.
7284 Returns true if SYM is found in EXPR. */
7287 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7289 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7296 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7297 to be a scalar INTEGER variable. The subscripts and stride are scalar
7298 INTEGERs, and if stride is a constant it must be nonzero.
7299 Furthermore "A subscript or stride in a forall-triplet-spec shall
7300 not contain a reference to any index-name in the
7301 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7304 resolve_forall_iterators (gfc_forall_iterator
*it
)
7306 gfc_forall_iterator
*iter
, *iter2
;
7308 for (iter
= it
; iter
; iter
= iter
->next
)
7310 if (gfc_resolve_expr (iter
->var
)
7311 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7312 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7315 if (gfc_resolve_expr (iter
->start
)
7316 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7317 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7318 &iter
->start
->where
);
7319 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7320 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7322 if (gfc_resolve_expr (iter
->end
)
7323 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7324 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7326 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7327 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7329 if (gfc_resolve_expr (iter
->stride
))
7331 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7332 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7333 &iter
->stride
->where
, "INTEGER");
7335 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7336 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7337 gfc_error ("FORALL stride expression at %L cannot be zero",
7338 &iter
->stride
->where
);
7340 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7341 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7344 for (iter
= it
; iter
; iter
= iter
->next
)
7345 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7347 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7348 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7349 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7350 gfc_error ("FORALL index %qs may not appear in triplet "
7351 "specification at %L", iter
->var
->symtree
->name
,
7352 &iter2
->start
->where
);
7357 /* Given a pointer to a symbol that is a derived type, see if it's
7358 inaccessible, i.e. if it's defined in another module and the components are
7359 PRIVATE. The search is recursive if necessary. Returns zero if no
7360 inaccessible components are found, nonzero otherwise. */
7363 derived_inaccessible (gfc_symbol
*sym
)
7367 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7370 for (c
= sym
->components
; c
; c
= c
->next
)
7372 /* Prevent an infinite loop through this function. */
7373 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7374 && sym
== c
->ts
.u
.derived
)
7377 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7385 /* Resolve the argument of a deallocate expression. The expression must be
7386 a pointer or a full array. */
7389 resolve_deallocate_expr (gfc_expr
*e
)
7391 symbol_attribute attr
;
7392 int allocatable
, pointer
;
7398 if (!gfc_resolve_expr (e
))
7401 if (e
->expr_type
!= EXPR_VARIABLE
)
7404 sym
= e
->symtree
->n
.sym
;
7405 unlimited
= UNLIMITED_POLY(sym
);
7407 if (sym
->ts
.type
== BT_CLASS
)
7409 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7410 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7414 allocatable
= sym
->attr
.allocatable
;
7415 pointer
= sym
->attr
.pointer
;
7417 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7422 if (ref
->u
.ar
.type
!= AR_FULL
7423 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7424 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7429 c
= ref
->u
.c
.component
;
7430 if (c
->ts
.type
== BT_CLASS
)
7432 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7433 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7437 allocatable
= c
->attr
.allocatable
;
7438 pointer
= c
->attr
.pointer
;
7449 attr
= gfc_expr_attr (e
);
7451 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7454 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7460 if (gfc_is_coindexed (e
))
7462 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7467 && !gfc_check_vardef_context (e
, true, true, false,
7468 _("DEALLOCATE object")))
7470 if (!gfc_check_vardef_context (e
, false, true, false,
7471 _("DEALLOCATE object")))
7478 /* Returns true if the expression e contains a reference to the symbol sym. */
7480 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7482 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7489 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7491 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7495 /* Given the expression node e for an allocatable/pointer of derived type to be
7496 allocated, get the expression node to be initialized afterwards (needed for
7497 derived types with default initializers, and derived types with allocatable
7498 components that need nullification.) */
7501 gfc_expr_to_initialize (gfc_expr
*e
)
7507 result
= gfc_copy_expr (e
);
7509 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7510 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7511 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7513 if (ref
->u
.ar
.dimen
== 0
7514 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7517 ref
->u
.ar
.type
= AR_FULL
;
7519 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7520 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7525 gfc_free_shape (&result
->shape
, result
->rank
);
7527 /* Recalculate rank, shape, etc. */
7528 gfc_resolve_expr (result
);
7533 /* If the last ref of an expression is an array ref, return a copy of the
7534 expression with that one removed. Otherwise, a copy of the original
7535 expression. This is used for allocate-expressions and pointer assignment
7536 LHS, where there may be an array specification that needs to be stripped
7537 off when using gfc_check_vardef_context. */
7540 remove_last_array_ref (gfc_expr
* e
)
7545 e2
= gfc_copy_expr (e
);
7546 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7547 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7549 gfc_free_ref_list (*r
);
7558 /* Used in resolve_allocate_expr to check that a allocation-object and
7559 a source-expr are conformable. This does not catch all possible
7560 cases; in particular a runtime checking is needed. */
7563 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7566 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7568 /* First compare rank. */
7569 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7570 || (!tail
&& e1
->rank
!= e2
->rank
))
7572 gfc_error ("Source-expr at %L must be scalar or have the "
7573 "same rank as the allocate-object at %L",
7574 &e1
->where
, &e2
->where
);
7585 for (i
= 0; i
< e1
->rank
; i
++)
7587 if (tail
->u
.ar
.start
[i
] == NULL
)
7590 if (tail
->u
.ar
.end
[i
])
7592 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7593 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7594 mpz_add_ui (s
, s
, 1);
7598 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7601 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7603 gfc_error ("Source-expr at %L and allocate-object at %L must "
7604 "have the same shape", &e1
->where
, &e2
->where
);
7617 /* Resolve the expression in an ALLOCATE statement, doing the additional
7618 checks to see whether the expression is OK or not. The expression must
7619 have a trailing array reference that gives the size of the array. */
7622 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7624 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7628 symbol_attribute attr
;
7629 gfc_ref
*ref
, *ref2
;
7632 gfc_symbol
*sym
= NULL
;
7637 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7638 checking of coarrays. */
7639 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7640 if (ref
->next
== NULL
)
7643 if (ref
&& ref
->type
== REF_ARRAY
)
7644 ref
->u
.ar
.in_allocate
= true;
7646 if (!gfc_resolve_expr (e
))
7649 /* Make sure the expression is allocatable or a pointer. If it is
7650 pointer, the next-to-last reference must be a pointer. */
7654 sym
= e
->symtree
->n
.sym
;
7656 /* Check whether ultimate component is abstract and CLASS. */
7659 /* Is the allocate-object unlimited polymorphic? */
7660 unlimited
= UNLIMITED_POLY(e
);
7662 if (e
->expr_type
!= EXPR_VARIABLE
)
7665 attr
= gfc_expr_attr (e
);
7666 pointer
= attr
.pointer
;
7667 dimension
= attr
.dimension
;
7668 codimension
= attr
.codimension
;
7672 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7674 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7675 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7676 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7677 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7678 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7682 allocatable
= sym
->attr
.allocatable
;
7683 pointer
= sym
->attr
.pointer
;
7684 dimension
= sym
->attr
.dimension
;
7685 codimension
= sym
->attr
.codimension
;
7690 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7695 if (ref
->u
.ar
.codimen
> 0)
7698 for (n
= ref
->u
.ar
.dimen
;
7699 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7700 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7707 if (ref
->next
!= NULL
)
7715 gfc_error ("Coindexed allocatable object at %L",
7720 c
= ref
->u
.c
.component
;
7721 if (c
->ts
.type
== BT_CLASS
)
7723 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7724 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7725 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7726 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7727 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7731 allocatable
= c
->attr
.allocatable
;
7732 pointer
= c
->attr
.pointer
;
7733 dimension
= c
->attr
.dimension
;
7734 codimension
= c
->attr
.codimension
;
7735 is_abstract
= c
->attr
.abstract
;
7748 /* Check for F08:C628. */
7749 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7751 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7756 /* Some checks for the SOURCE tag. */
7759 /* Check F03:C631. */
7760 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7762 gfc_error ("Type of entity at %L is type incompatible with "
7763 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7767 /* Check F03:C632 and restriction following Note 6.18. */
7768 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7771 /* Check F03:C633. */
7772 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7774 gfc_error ("The allocate-object at %L and the source-expr at %L "
7775 "shall have the same kind type parameter",
7776 &e
->where
, &code
->expr3
->where
);
7780 /* Check F2008, C642. */
7781 if (code
->expr3
->ts
.type
== BT_DERIVED
7782 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7783 || (code
->expr3
->ts
.u
.derived
->from_intmod
7784 == INTMOD_ISO_FORTRAN_ENV
7785 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7786 == ISOFORTRAN_LOCK_TYPE
)))
7788 gfc_error ("The source-expr at %L shall neither be of type "
7789 "LOCK_TYPE nor have a LOCK_TYPE component if "
7790 "allocate-object at %L is a coarray",
7791 &code
->expr3
->where
, &e
->where
);
7795 /* Check TS18508, C702/C703. */
7796 if (code
->expr3
->ts
.type
== BT_DERIVED
7797 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7798 || (code
->expr3
->ts
.u
.derived
->from_intmod
7799 == INTMOD_ISO_FORTRAN_ENV
7800 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7801 == ISOFORTRAN_EVENT_TYPE
)))
7803 gfc_error ("The source-expr at %L shall neither be of type "
7804 "EVENT_TYPE nor have a EVENT_TYPE component if "
7805 "allocate-object at %L is a coarray",
7806 &code
->expr3
->where
, &e
->where
);
7811 /* Check F08:C629. */
7812 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7815 gcc_assert (e
->ts
.type
== BT_CLASS
);
7816 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7817 "type-spec or source-expr", sym
->name
, &e
->where
);
7821 /* Check F08:C632. */
7822 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7823 && !UNLIMITED_POLY (e
))
7827 if (!e
->ts
.u
.cl
->length
)
7830 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7831 code
->ext
.alloc
.ts
.u
.cl
->length
);
7832 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7834 gfc_error ("Allocating %s at %L with type-spec requires the same "
7835 "character-length parameter as in the declaration",
7836 sym
->name
, &e
->where
);
7841 /* In the variable definition context checks, gfc_expr_attr is used
7842 on the expression. This is fooled by the array specification
7843 present in e, thus we have to eliminate that one temporarily. */
7844 e2
= remove_last_array_ref (e
);
7847 t
= gfc_check_vardef_context (e2
, true, true, false,
7848 _("ALLOCATE object"));
7850 t
= gfc_check_vardef_context (e2
, false, true, false,
7851 _("ALLOCATE object"));
7856 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7857 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7859 /* For class arrays, the initialization with SOURCE is done
7860 using _copy and trans_call. It is convenient to exploit that
7861 when the allocated type is different from the declared type but
7862 no SOURCE exists by setting expr3. */
7863 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7865 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7866 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7867 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7869 /* We have to zero initialize the integer variable. */
7870 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7873 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7875 /* Make sure the vtab symbol is present when
7876 the module variables are generated. */
7877 gfc_typespec ts
= e
->ts
;
7879 ts
= code
->expr3
->ts
;
7880 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7881 ts
= code
->ext
.alloc
.ts
;
7883 /* Finding the vtab also publishes the type's symbol. Therefore this
7884 statement is necessary. */
7885 gfc_find_derived_vtab (ts
.u
.derived
);
7887 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7889 /* Again, make sure the vtab symbol is present when
7890 the module variables are generated. */
7891 gfc_typespec
*ts
= NULL
;
7893 ts
= &code
->expr3
->ts
;
7895 ts
= &code
->ext
.alloc
.ts
;
7899 /* Finding the vtab also publishes the type's symbol. Therefore this
7900 statement is necessary. */
7904 if (dimension
== 0 && codimension
== 0)
7907 /* Make sure the last reference node is an array specification. */
7909 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7910 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7915 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7916 "in ALLOCATE statement at %L", &e
->where
))
7918 if (code
->expr3
->rank
!= 0)
7919 *array_alloc_wo_spec
= true;
7922 gfc_error ("Array specification or array-valued SOURCE= "
7923 "expression required in ALLOCATE statement at %L",
7930 gfc_error ("Array specification required in ALLOCATE statement "
7931 "at %L", &e
->where
);
7936 /* Make sure that the array section reference makes sense in the
7937 context of an ALLOCATE specification. */
7942 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7944 switch (ar
->dimen_type
[i
])
7946 case DIMEN_THIS_IMAGE
:
7947 gfc_error ("Coarray specification required in ALLOCATE statement "
7948 "at %L", &e
->where
);
7952 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7954 /* If ar->stride[i] is NULL, we issued a previous error. */
7955 if (ar
->stride
[i
] == NULL
)
7956 gfc_error ("Bad array specification in ALLOCATE statement "
7957 "at %L", &e
->where
);
7960 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7962 gfc_error ("Upper cobound is less than lower cobound at %L",
7963 &ar
->start
[i
]->where
);
7969 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7971 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7972 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7974 gfc_error ("Upper cobound is less than lower cobound "
7975 "of 1 at %L", &ar
->start
[i
]->where
);
7985 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7991 for (i
= 0; i
< ar
->dimen
; i
++)
7993 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7996 switch (ar
->dimen_type
[i
])
8002 if (ar
->start
[i
] != NULL
8003 && ar
->end
[i
] != NULL
8004 && ar
->stride
[i
] == NULL
)
8012 case DIMEN_THIS_IMAGE
:
8013 gfc_error ("Bad array specification in ALLOCATE statement at %L",
8019 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8021 sym
= a
->expr
->symtree
->n
.sym
;
8023 /* TODO - check derived type components. */
8024 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
8027 if ((ar
->start
[i
] != NULL
8028 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
8029 || (ar
->end
[i
] != NULL
8030 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
8032 gfc_error ("%qs must not appear in the array specification at "
8033 "%L in the same ALLOCATE statement where it is "
8034 "itself allocated", sym
->name
, &ar
->where
);
8040 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
8042 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
8043 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
8045 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
8047 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
8048 "statement at %L", &e
->where
);
8054 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
8055 && ar
->stride
[i
] == NULL
)
8058 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
8072 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
8074 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
8075 gfc_alloc
*a
, *p
, *q
;
8078 errmsg
= code
->expr2
;
8080 /* Check the stat variable. */
8083 gfc_check_vardef_context (stat
, false, false, false,
8084 _("STAT variable"));
8086 if ((stat
->ts
.type
!= BT_INTEGER
8087 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8088 || stat
->ref
->type
== REF_COMPONENT
)))
8090 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8091 "variable", &stat
->where
);
8093 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8094 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8096 gfc_ref
*ref1
, *ref2
;
8099 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8100 ref1
= ref1
->next
, ref2
= ref2
->next
)
8102 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8104 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8113 gfc_error ("Stat-variable at %L shall not be %sd within "
8114 "the same %s statement", &stat
->where
, fcn
, fcn
);
8120 /* Check the errmsg variable. */
8124 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8127 gfc_check_vardef_context (errmsg
, false, false, false,
8128 _("ERRMSG variable"));
8130 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8131 F18:R930 errmsg-variable is scalar-default-char-variable
8132 F18:R906 default-char-variable is variable
8133 F18:C906 default-char-variable shall be default character. */
8134 if ((errmsg
->ts
.type
!= BT_CHARACTER
8136 && (errmsg
->ref
->type
== REF_ARRAY
8137 || errmsg
->ref
->type
== REF_COMPONENT
)))
8139 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8140 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8141 "variable", &errmsg
->where
);
8143 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8144 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8146 gfc_ref
*ref1
, *ref2
;
8149 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8150 ref1
= ref1
->next
, ref2
= ref2
->next
)
8152 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8154 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8163 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8164 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8170 /* Check that an allocate-object appears only once in the statement. */
8172 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8175 for (q
= p
->next
; q
; q
= q
->next
)
8178 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8180 /* This is a potential collision. */
8181 gfc_ref
*pr
= pe
->ref
;
8182 gfc_ref
*qr
= qe
->ref
;
8184 /* Follow the references until
8185 a) They start to differ, in which case there is no error;
8186 you can deallocate a%b and a%c in a single statement
8187 b) Both of them stop, which is an error
8188 c) One of them stops, which is also an error. */
8191 if (pr
== NULL
&& qr
== NULL
)
8193 gfc_error ("Allocate-object at %L also appears at %L",
8194 &pe
->where
, &qe
->where
);
8197 else if (pr
!= NULL
&& qr
== NULL
)
8199 gfc_error ("Allocate-object at %L is subobject of"
8200 " object at %L", &pe
->where
, &qe
->where
);
8203 else if (pr
== NULL
&& qr
!= NULL
)
8205 gfc_error ("Allocate-object at %L is subobject of"
8206 " object at %L", &qe
->where
, &pe
->where
);
8209 /* Here, pr != NULL && qr != NULL */
8210 gcc_assert(pr
->type
== qr
->type
);
8211 if (pr
->type
== REF_ARRAY
)
8213 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8215 gcc_assert (qr
->type
== REF_ARRAY
);
8217 if (pr
->next
&& qr
->next
)
8220 gfc_array_ref
*par
= &(pr
->u
.ar
);
8221 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8223 for (i
=0; i
<par
->dimen
; i
++)
8225 if ((par
->start
[i
] != NULL
8226 || qar
->start
[i
] != NULL
)
8227 && gfc_dep_compare_expr (par
->start
[i
],
8228 qar
->start
[i
]) != 0)
8235 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8248 if (strcmp (fcn
, "ALLOCATE") == 0)
8250 bool arr_alloc_wo_spec
= false;
8252 /* Resolving the expr3 in the loop over all objects to allocate would
8253 execute loop invariant code for each loop item. Therefore do it just
8255 if (code
->expr3
&& code
->expr3
->mold
8256 && code
->expr3
->ts
.type
== BT_DERIVED
)
8258 /* Default initialization via MOLD (non-polymorphic). */
8259 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8262 gfc_resolve_expr (rhs
);
8263 gfc_free_expr (code
->expr3
);
8267 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8268 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8270 if (arr_alloc_wo_spec
&& code
->expr3
)
8272 /* Mark the allocate to have to take the array specification
8274 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8279 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8280 resolve_deallocate_expr (a
->expr
);
8285 /************ SELECT CASE resolution subroutines ************/
8287 /* Callback function for our mergesort variant. Determines interval
8288 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8289 op1 > op2. Assumes we're not dealing with the default case.
8290 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8291 There are nine situations to check. */
8294 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8298 if (op1
->low
== NULL
) /* op1 = (:L) */
8300 /* op2 = (:N), so overlap. */
8302 /* op2 = (M:) or (M:N), L < M */
8303 if (op2
->low
!= NULL
8304 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8307 else if (op1
->high
== NULL
) /* op1 = (K:) */
8309 /* op2 = (M:), so overlap. */
8311 /* op2 = (:N) or (M:N), K > N */
8312 if (op2
->high
!= NULL
8313 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8316 else /* op1 = (K:L) */
8318 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8319 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8321 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8322 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8324 else /* op2 = (M:N) */
8328 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8331 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8340 /* Merge-sort a double linked case list, detecting overlap in the
8341 process. LIST is the head of the double linked case list before it
8342 is sorted. Returns the head of the sorted list if we don't see any
8343 overlap, or NULL otherwise. */
8346 check_case_overlap (gfc_case
*list
)
8348 gfc_case
*p
, *q
, *e
, *tail
;
8349 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8351 /* If the passed list was empty, return immediately. */
8358 /* Loop unconditionally. The only exit from this loop is a return
8359 statement, when we've finished sorting the case list. */
8366 /* Count the number of merges we do in this pass. */
8369 /* Loop while there exists a merge to be done. */
8374 /* Count this merge. */
8377 /* Cut the list in two pieces by stepping INSIZE places
8378 forward in the list, starting from P. */
8381 for (i
= 0; i
< insize
; i
++)
8390 /* Now we have two lists. Merge them! */
8391 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8393 /* See from which the next case to merge comes from. */
8396 /* P is empty so the next case must come from Q. */
8401 else if (qsize
== 0 || q
== NULL
)
8410 cmp
= compare_cases (p
, q
);
8413 /* The whole case range for P is less than the
8421 /* The whole case range for Q is greater than
8422 the case range for P. */
8429 /* The cases overlap, or they are the same
8430 element in the list. Either way, we must
8431 issue an error and get the next case from P. */
8432 /* FIXME: Sort P and Q by line number. */
8433 gfc_error ("CASE label at %L overlaps with CASE "
8434 "label at %L", &p
->where
, &q
->where
);
8442 /* Add the next element to the merged list. */
8451 /* P has now stepped INSIZE places along, and so has Q. So
8452 they're the same. */
8457 /* If we have done only one merge or none at all, we've
8458 finished sorting the cases. */
8467 /* Otherwise repeat, merging lists twice the size. */
8473 /* Check to see if an expression is suitable for use in a CASE statement.
8474 Makes sure that all case expressions are scalar constants of the same
8475 type. Return false if anything is wrong. */
8478 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8480 if (e
== NULL
) return true;
8482 if (e
->ts
.type
!= case_expr
->ts
.type
)
8484 gfc_error ("Expression in CASE statement at %L must be of type %s",
8485 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8489 /* C805 (R808) For a given case-construct, each case-value shall be of
8490 the same type as case-expr. For character type, length differences
8491 are allowed, but the kind type parameters shall be the same. */
8493 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8495 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8496 &e
->where
, case_expr
->ts
.kind
);
8500 /* Convert the case value kind to that of case expression kind,
8503 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8504 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8508 gfc_error ("Expression in CASE statement at %L must be scalar",
8517 /* Given a completely parsed select statement, we:
8519 - Validate all expressions and code within the SELECT.
8520 - Make sure that the selection expression is not of the wrong type.
8521 - Make sure that no case ranges overlap.
8522 - Eliminate unreachable cases and unreachable code resulting from
8523 removing case labels.
8525 The standard does allow unreachable cases, e.g. CASE (5:3). But
8526 they are a hassle for code generation, and to prevent that, we just
8527 cut them out here. This is not necessary for overlapping cases
8528 because they are illegal and we never even try to generate code.
8530 We have the additional caveat that a SELECT construct could have
8531 been a computed GOTO in the source code. Fortunately we can fairly
8532 easily work around that here: The case_expr for a "real" SELECT CASE
8533 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8534 we have to do is make sure that the case_expr is a scalar integer
8538 resolve_select (gfc_code
*code
, bool select_type
)
8541 gfc_expr
*case_expr
;
8542 gfc_case
*cp
, *default_case
, *tail
, *head
;
8543 int seen_unreachable
;
8549 if (code
->expr1
== NULL
)
8551 /* This was actually a computed GOTO statement. */
8552 case_expr
= code
->expr2
;
8553 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8554 gfc_error ("Selection expression in computed GOTO statement "
8555 "at %L must be a scalar integer expression",
8558 /* Further checking is not necessary because this SELECT was built
8559 by the compiler, so it should always be OK. Just move the
8560 case_expr from expr2 to expr so that we can handle computed
8561 GOTOs as normal SELECTs from here on. */
8562 code
->expr1
= code
->expr2
;
8567 case_expr
= code
->expr1
;
8568 type
= case_expr
->ts
.type
;
8571 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8573 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8574 &case_expr
->where
, gfc_typename (case_expr
));
8576 /* Punt. Going on here just produce more garbage error messages. */
8581 if (!select_type
&& case_expr
->rank
!= 0)
8583 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8584 "expression", &case_expr
->where
);
8590 /* Raise a warning if an INTEGER case value exceeds the range of
8591 the case-expr. Later, all expressions will be promoted to the
8592 largest kind of all case-labels. */
8594 if (type
== BT_INTEGER
)
8595 for (body
= code
->block
; body
; body
= body
->block
)
8596 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8599 && gfc_check_integer_range (cp
->low
->value
.integer
,
8600 case_expr
->ts
.kind
) != ARITH_OK
)
8601 gfc_warning (0, "Expression in CASE statement at %L is "
8602 "not in the range of %s", &cp
->low
->where
,
8603 gfc_typename (case_expr
));
8606 && cp
->low
!= cp
->high
8607 && gfc_check_integer_range (cp
->high
->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
->high
->where
,
8611 gfc_typename (case_expr
));
8614 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8615 of the SELECT CASE expression and its CASE values. Walk the lists
8616 of case values, and if we find a mismatch, promote case_expr to
8617 the appropriate kind. */
8619 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8621 for (body
= code
->block
; body
; body
= body
->block
)
8623 /* Walk the case label list. */
8624 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8626 /* Intercept the DEFAULT case. It does not have a kind. */
8627 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8630 /* Unreachable case ranges are discarded, so ignore. */
8631 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8632 && cp
->low
!= cp
->high
8633 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8637 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8638 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8640 if (cp
->high
!= NULL
8641 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8642 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8647 /* Assume there is no DEFAULT case. */
8648 default_case
= NULL
;
8653 for (body
= code
->block
; body
; body
= body
->block
)
8655 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8657 seen_unreachable
= 0;
8659 /* Walk the case label list, making sure that all case labels
8661 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8663 /* Count the number of cases in the whole construct. */
8666 /* Intercept the DEFAULT case. */
8667 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8669 if (default_case
!= NULL
)
8671 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8672 "by a second DEFAULT CASE at %L",
8673 &default_case
->where
, &cp
->where
);
8684 /* Deal with single value cases and case ranges. Errors are
8685 issued from the validation function. */
8686 if (!validate_case_label_expr (cp
->low
, case_expr
)
8687 || !validate_case_label_expr (cp
->high
, case_expr
))
8693 if (type
== BT_LOGICAL
8694 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8695 || cp
->low
!= cp
->high
))
8697 gfc_error ("Logical range in CASE statement at %L is not "
8698 "allowed", &cp
->low
->where
);
8703 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8706 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8707 if (value
& seen_logical
)
8709 gfc_error ("Constant logical value in CASE statement "
8710 "is repeated at %L",
8715 seen_logical
|= value
;
8718 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8719 && cp
->low
!= cp
->high
8720 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8722 if (warn_surprising
)
8723 gfc_warning (OPT_Wsurprising
,
8724 "Range specification at %L can never be matched",
8727 cp
->unreachable
= 1;
8728 seen_unreachable
= 1;
8732 /* If the case range can be matched, it can also overlap with
8733 other cases. To make sure it does not, we put it in a
8734 double linked list here. We sort that with a merge sort
8735 later on to detect any overlapping cases. */
8739 head
->right
= head
->left
= NULL
;
8744 tail
->right
->left
= tail
;
8751 /* It there was a failure in the previous case label, give up
8752 for this case label list. Continue with the next block. */
8756 /* See if any case labels that are unreachable have been seen.
8757 If so, we eliminate them. This is a bit of a kludge because
8758 the case lists for a single case statement (label) is a
8759 single forward linked lists. */
8760 if (seen_unreachable
)
8762 /* Advance until the first case in the list is reachable. */
8763 while (body
->ext
.block
.case_list
!= NULL
8764 && body
->ext
.block
.case_list
->unreachable
)
8766 gfc_case
*n
= body
->ext
.block
.case_list
;
8767 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8769 gfc_free_case_list (n
);
8772 /* Strip all other unreachable cases. */
8773 if (body
->ext
.block
.case_list
)
8775 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8777 if (cp
->next
->unreachable
)
8779 gfc_case
*n
= cp
->next
;
8780 cp
->next
= cp
->next
->next
;
8782 gfc_free_case_list (n
);
8789 /* See if there were overlapping cases. If the check returns NULL,
8790 there was overlap. In that case we don't do anything. If head
8791 is non-NULL, we prepend the DEFAULT case. The sorted list can
8792 then used during code generation for SELECT CASE constructs with
8793 a case expression of a CHARACTER type. */
8796 head
= check_case_overlap (head
);
8798 /* Prepend the default_case if it is there. */
8799 if (head
!= NULL
&& default_case
)
8801 default_case
->left
= NULL
;
8802 default_case
->right
= head
;
8803 head
->left
= default_case
;
8807 /* Eliminate dead blocks that may be the result if we've seen
8808 unreachable case labels for a block. */
8809 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8811 if (body
->block
->ext
.block
.case_list
== NULL
)
8813 /* Cut the unreachable block from the code chain. */
8814 gfc_code
*c
= body
->block
;
8815 body
->block
= c
->block
;
8817 /* Kill the dead block, but not the blocks below it. */
8819 gfc_free_statements (c
);
8823 /* More than two cases is legal but insane for logical selects.
8824 Issue a warning for it. */
8825 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8826 gfc_warning (OPT_Wsurprising
,
8827 "Logical SELECT CASE block at %L has more that two cases",
8832 /* Check if a derived type is extensible. */
8835 gfc_type_is_extensible (gfc_symbol
*sym
)
8837 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8838 || (sym
->attr
.is_class
8839 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8844 resolve_types (gfc_namespace
*ns
);
8846 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8847 correct as well as possibly the array-spec. */
8850 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8854 gcc_assert (sym
->assoc
);
8855 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8857 /* If this is for SELECT TYPE, the target may not yet be set. In that
8858 case, return. Resolution will be called later manually again when
8860 target
= sym
->assoc
->target
;
8863 gcc_assert (!sym
->assoc
->dangling
);
8865 if (resolve_target
&& !gfc_resolve_expr (target
))
8868 /* For variable targets, we get some attributes from the target. */
8869 if (target
->expr_type
== EXPR_VARIABLE
)
8871 gfc_symbol
*tsym
, *dsym
;
8873 gcc_assert (target
->symtree
);
8874 tsym
= target
->symtree
->n
.sym
;
8876 if (gfc_expr_attr (target
).proc_pointer
)
8878 gfc_error ("Associating entity %qs at %L is a procedure pointer",
8879 tsym
->name
, &target
->where
);
8883 if (tsym
->attr
.flavor
== FL_PROCEDURE
&& tsym
->generic
8884 && (dsym
= gfc_find_dt_in_generic (tsym
)) != NULL
8885 && dsym
->attr
.flavor
== FL_DERIVED
)
8887 gfc_error ("Derived type %qs cannot be used as a variable at %L",
8888 tsym
->name
, &target
->where
);
8892 if (tsym
->attr
.flavor
== FL_PROCEDURE
)
8894 bool is_error
= true;
8895 if (tsym
->attr
.function
&& tsym
->result
== tsym
)
8896 for (gfc_namespace
*ns
= sym
->ns
; ns
; ns
= ns
->parent
)
8897 if (tsym
== ns
->proc_name
)
8904 gfc_error ("Associating entity %qs at %L is a procedure name",
8905 tsym
->name
, &target
->where
);
8910 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8911 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8913 sym
->attr
.target
= tsym
->attr
.target
8914 || gfc_expr_attr (target
).pointer
;
8915 if (is_subref_array (target
))
8916 sym
->attr
.subref_array_pointer
= 1;
8918 else if (target
->ts
.type
== BT_PROCEDURE
)
8920 gfc_error ("Associating selector-expression at %L yields a procedure",
8925 if (target
->expr_type
== EXPR_NULL
)
8927 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8930 else if (target
->ts
.type
== BT_UNKNOWN
)
8932 gfc_error ("Selector at %L has no type", &target
->where
);
8936 /* Get type if this was not already set. Note that it can be
8937 some other type than the target in case this is a SELECT TYPE
8938 selector! So we must not update when the type is already there. */
8939 if (sym
->ts
.type
== BT_UNKNOWN
)
8940 sym
->ts
= target
->ts
;
8942 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8944 /* See if this is a valid association-to-variable. */
8945 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8946 && !gfc_has_vector_subscript (target
));
8948 /* Finally resolve if this is an array or not. */
8949 if (sym
->attr
.dimension
&& target
->rank
== 0)
8951 /* primary.c makes the assumption that a reference to an associate
8952 name followed by a left parenthesis is an array reference. */
8953 if (sym
->ts
.type
!= BT_CHARACTER
)
8954 gfc_error ("Associate-name %qs at %L is used as array",
8955 sym
->name
, &sym
->declared_at
);
8956 sym
->attr
.dimension
= 0;
8961 /* We cannot deal with class selectors that need temporaries. */
8962 if (target
->ts
.type
== BT_CLASS
8963 && gfc_ref_needs_temporary_p (target
->ref
))
8965 gfc_error ("CLASS selector at %L needs a temporary which is not "
8966 "yet implemented", &target
->where
);
8970 if (target
->ts
.type
== BT_CLASS
)
8971 gfc_fix_class_refs (target
);
8973 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8976 /* The rank may be incorrectly guessed at parsing, therefore make sure
8977 it is corrected now. */
8978 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8981 sym
->as
= gfc_get_array_spec ();
8983 as
->rank
= target
->rank
;
8984 as
->type
= AS_DEFERRED
;
8985 as
->corank
= gfc_get_corank (target
);
8986 sym
->attr
.dimension
= 1;
8987 if (as
->corank
!= 0)
8988 sym
->attr
.codimension
= 1;
8990 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8992 if (!CLASS_DATA (sym
)->as
)
8993 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8994 as
= CLASS_DATA (sym
)->as
;
8995 as
->rank
= target
->rank
;
8996 as
->type
= AS_DEFERRED
;
8997 as
->corank
= gfc_get_corank (target
);
8998 CLASS_DATA (sym
)->attr
.dimension
= 1;
8999 if (as
->corank
!= 0)
9000 CLASS_DATA (sym
)->attr
.codimension
= 1;
9003 else if (!sym
->attr
.select_rank_temporary
)
9005 /* target's rank is 0, but the type of the sym is still array valued,
9006 which has to be corrected. */
9007 if (sym
->ts
.type
== BT_CLASS
9008 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
9011 symbol_attribute attr
;
9012 /* The associated variable's type is still the array type
9013 correct this now. */
9014 gfc_typespec
*ts
= &target
->ts
;
9017 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
9022 ts
= &ref
->u
.c
.component
->ts
;
9025 if (ts
->type
== BT_CLASS
)
9026 ts
= &ts
->u
.derived
->components
->ts
;
9032 /* Create a scalar instance of the current class type. Because the
9033 rank of a class array goes into its name, the type has to be
9034 rebuild. The alternative of (re-)setting just the attributes
9035 and as in the current type, destroys the type also in other
9039 sym
->ts
.type
= BT_CLASS
;
9040 attr
= CLASS_DATA (sym
)->attr
;
9042 attr
.associate_var
= 1;
9043 attr
.dimension
= attr
.codimension
= 0;
9044 attr
.class_pointer
= 1;
9045 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
9047 /* Make sure the _vptr is set. */
9048 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
9049 if (c
->ts
.u
.derived
== NULL
)
9050 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
9051 CLASS_DATA (sym
)->attr
.pointer
= 1;
9052 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
9053 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
9054 gfc_commit_symbol (sym
->ts
.u
.derived
);
9055 /* _vptr now has the _vtab in it, change it to the _vtype. */
9056 if (c
->ts
.u
.derived
->attr
.vtab
)
9057 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
9058 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
9059 resolve_types (c
->ts
.u
.derived
->ns
);
9063 /* Mark this as an associate variable. */
9064 sym
->attr
.associate_var
= 1;
9066 /* Fix up the type-spec for CHARACTER types. */
9067 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
9070 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
9072 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
9073 && target
->symtree
->n
.sym
->attr
.dummy
9074 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
9076 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9077 sym
->ts
.deferred
= 1;
9080 if (!sym
->ts
.u
.cl
->length
9081 && !sym
->ts
.deferred
9082 && target
->expr_type
== EXPR_CONSTANT
)
9084 sym
->ts
.u
.cl
->length
=
9085 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
9086 target
->value
.character
.length
);
9088 else if ((!sym
->ts
.u
.cl
->length
9089 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
9090 && target
->expr_type
!= EXPR_VARIABLE
)
9092 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
9093 sym
->ts
.deferred
= 1;
9095 /* This is reset in trans-stmt.c after the assignment
9096 of the target expression to the associate name. */
9097 sym
->attr
.allocatable
= 1;
9101 /* If the target is a good class object, so is the associate variable. */
9102 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
9103 sym
->attr
.class_ok
= 1;
9107 /* Ensure that SELECT TYPE expressions have the correct rank and a full
9108 array reference, where necessary. The symbols are artificial and so
9109 the dimension attribute and arrayspec can also be set. In addition,
9110 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
9111 This is corrected here as well.*/
9114 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
9115 int rank
, gfc_ref
*ref
)
9117 gfc_ref
*nref
= (*expr1
)->ref
;
9118 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9119 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9120 (*expr1
)->rank
= rank
;
9121 if (sym1
->ts
.type
== BT_CLASS
)
9123 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9124 (*expr1
)->ts
= sym1
->ts
;
9126 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9127 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9128 CLASS_DATA (sym1
)->as
9129 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9133 sym1
->attr
.dimension
= 1;
9134 if (sym1
->as
== NULL
&& sym2
)
9135 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9138 for (; nref
; nref
= nref
->next
)
9139 if (nref
->next
== NULL
)
9142 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9143 nref
->next
= gfc_copy_ref (ref
);
9144 else if (ref
&& !nref
)
9145 (*expr1
)->ref
= gfc_copy_ref (ref
);
9150 build_loc_call (gfc_expr
*sym_expr
)
9153 loc_call
= gfc_get_expr ();
9154 loc_call
->expr_type
= EXPR_FUNCTION
;
9155 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9156 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9157 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9158 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9159 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9160 loc_call
->ts
.type
= BT_INTEGER
;
9161 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9162 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9163 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9164 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9165 loc_call
->where
= sym_expr
->where
;
9169 /* Resolve a SELECT TYPE statement. */
9172 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9174 gfc_symbol
*selector_type
;
9175 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9176 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9179 char name
[GFC_MAX_SYMBOL_LEN
];
9183 gfc_ref
* ref
= NULL
;
9184 gfc_expr
*selector_expr
= NULL
;
9186 ns
= code
->ext
.block
.ns
;
9189 /* Check for F03:C813. */
9190 if (code
->expr1
->ts
.type
!= BT_CLASS
9191 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9193 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9194 "at %L", &code
->loc
);
9198 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9203 gfc_ref
*ref2
= NULL
;
9204 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9205 if (ref
->type
== REF_COMPONENT
9206 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9211 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9212 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9213 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9217 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9218 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9219 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9222 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9223 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9225 /* F2008: C803 The selector expression must not be coindexed. */
9226 if (gfc_is_coindexed (code
->expr2
))
9228 gfc_error ("Selector at %L must not be coindexed",
9229 &code
->expr2
->where
);
9236 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9238 if (gfc_is_coindexed (code
->expr1
))
9240 gfc_error ("Selector at %L must not be coindexed",
9241 &code
->expr1
->where
);
9246 /* Loop over TYPE IS / CLASS IS cases. */
9247 for (body
= code
->block
; body
; body
= body
->block
)
9249 c
= body
->ext
.block
.case_list
;
9253 /* Check for repeated cases. */
9254 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9256 gfc_case
*d
= tail
->ext
.block
.case_list
;
9260 if (c
->ts
.type
== d
->ts
.type
9261 && ((c
->ts
.type
== BT_DERIVED
9262 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9263 && !strcmp (c
->ts
.u
.derived
->name
,
9264 d
->ts
.u
.derived
->name
))
9265 || c
->ts
.type
== BT_UNKNOWN
9266 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9267 && c
->ts
.kind
== d
->ts
.kind
)))
9269 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9270 &c
->where
, &d
->where
);
9276 /* Check F03:C815. */
9277 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9278 && !selector_type
->attr
.unlimited_polymorphic
9279 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9281 gfc_error ("Derived type %qs at %L must be extensible",
9282 c
->ts
.u
.derived
->name
, &c
->where
);
9287 /* Check F03:C816. */
9288 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9289 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9290 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9292 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9293 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9294 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9296 gfc_error ("Unexpected intrinsic type %qs at %L",
9297 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9302 /* Check F03:C814. */
9303 if (c
->ts
.type
== BT_CHARACTER
9304 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9306 gfc_error ("The type-spec at %L shall specify that each length "
9307 "type parameter is assumed", &c
->where
);
9312 /* Intercept the DEFAULT case. */
9313 if (c
->ts
.type
== BT_UNKNOWN
)
9315 /* Check F03:C818. */
9318 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9319 "by a second DEFAULT CASE at %L",
9320 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9325 default_case
= body
;
9332 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9333 target if present. If there are any EXIT statements referring to the
9334 SELECT TYPE construct, this is no problem because the gfc_code
9335 reference stays the same and EXIT is equally possible from the BLOCK
9336 it is changed to. */
9337 code
->op
= EXEC_BLOCK
;
9340 gfc_association_list
* assoc
;
9342 assoc
= gfc_get_association_list ();
9343 assoc
->st
= code
->expr1
->symtree
;
9344 assoc
->target
= gfc_copy_expr (code
->expr2
);
9345 assoc
->target
->where
= code
->expr2
->where
;
9346 /* assoc->variable will be set by resolve_assoc_var. */
9348 code
->ext
.block
.assoc
= assoc
;
9349 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9351 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9354 code
->ext
.block
.assoc
= NULL
;
9356 /* Ensure that the selector rank and arrayspec are available to
9357 correct expressions in which they might be missing. */
9358 if (code
->expr2
&& code
->expr2
->rank
)
9360 rank
= code
->expr2
->rank
;
9361 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9362 if (ref
->next
== NULL
)
9364 if (ref
&& ref
->type
== REF_ARRAY
)
9365 ref
= gfc_copy_ref (ref
);
9367 /* Fixup expr1 if necessary. */
9369 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9371 else if (code
->expr1
->rank
)
9373 rank
= code
->expr1
->rank
;
9374 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9375 if (ref
->next
== NULL
)
9377 if (ref
&& ref
->type
== REF_ARRAY
)
9378 ref
= gfc_copy_ref (ref
);
9381 /* Add EXEC_SELECT to switch on type. */
9382 new_st
= gfc_get_code (code
->op
);
9383 new_st
->expr1
= code
->expr1
;
9384 new_st
->expr2
= code
->expr2
;
9385 new_st
->block
= code
->block
;
9386 code
->expr1
= code
->expr2
= NULL
;
9391 ns
->code
->next
= new_st
;
9393 code
->op
= EXEC_SELECT_TYPE
;
9395 /* Use the intrinsic LOC function to generate an integer expression
9396 for the vtable of the selector. Note that the rank of the selector
9397 expression has to be set to zero. */
9398 gfc_add_vptr_component (code
->expr1
);
9399 code
->expr1
->rank
= 0;
9400 code
->expr1
= build_loc_call (code
->expr1
);
9401 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9403 /* Loop over TYPE IS / CLASS IS cases. */
9404 for (body
= code
->block
; body
; body
= body
->block
)
9408 c
= body
->ext
.block
.case_list
;
9410 /* Generate an index integer expression for address of the
9411 TYPE/CLASS vtable and store it in c->low. The hash expression
9412 is stored in c->high and is used to resolve intrinsic cases. */
9413 if (c
->ts
.type
!= BT_UNKNOWN
)
9415 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9417 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9419 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9420 c
->ts
.u
.derived
->hash_value
);
9424 vtab
= gfc_find_vtab (&c
->ts
);
9425 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9426 e
= CLASS_DATA (vtab
)->initializer
;
9427 c
->high
= gfc_copy_expr (e
);
9428 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9431 ts
.kind
= gfc_integer_4_kind
;
9432 ts
.type
= BT_INTEGER
;
9433 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9437 e
= gfc_lval_expr_from_sym (vtab
);
9438 c
->low
= build_loc_call (e
);
9443 /* Associate temporary to selector. This should only be done
9444 when this case is actually true, so build a new ASSOCIATE
9445 that does precisely this here (instead of using the
9448 if (c
->ts
.type
== BT_CLASS
)
9449 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9450 else if (c
->ts
.type
== BT_DERIVED
)
9451 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9452 else if (c
->ts
.type
== BT_CHARACTER
)
9454 HOST_WIDE_INT charlen
= 0;
9455 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9456 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9457 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9458 snprintf (name
, sizeof (name
),
9459 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9460 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9463 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9466 st
= gfc_find_symtree (ns
->sym_root
, name
);
9467 gcc_assert (st
->n
.sym
->assoc
);
9468 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9469 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9470 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9472 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9473 /* Fixup the target expression if necessary. */
9475 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9478 new_st
= gfc_get_code (EXEC_BLOCK
);
9479 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9480 new_st
->ext
.block
.ns
->code
= body
->next
;
9481 body
->next
= new_st
;
9483 /* Chain in the new list only if it is marked as dangling. Otherwise
9484 there is a CASE label overlap and this is already used. Just ignore,
9485 the error is diagnosed elsewhere. */
9486 if (st
->n
.sym
->assoc
->dangling
)
9488 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9489 st
->n
.sym
->assoc
->dangling
= 0;
9492 resolve_assoc_var (st
->n
.sym
, false);
9495 /* Take out CLASS IS cases for separate treatment. */
9497 while (body
&& body
->block
)
9499 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9501 /* Add to class_is list. */
9502 if (class_is
== NULL
)
9504 class_is
= body
->block
;
9509 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9510 tail
->block
= body
->block
;
9513 /* Remove from EXEC_SELECT list. */
9514 body
->block
= body
->block
->block
;
9527 /* Add a default case to hold the CLASS IS cases. */
9528 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9529 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9531 tail
->ext
.block
.case_list
= gfc_get_case ();
9532 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9534 default_case
= tail
;
9537 /* More than one CLASS IS block? */
9538 if (class_is
->block
)
9542 /* Sort CLASS IS blocks by extension level. */
9546 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9549 /* F03:C817 (check for doubles). */
9550 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9551 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9553 gfc_error ("Double CLASS IS block in SELECT TYPE "
9555 &c2
->ext
.block
.case_list
->where
);
9558 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9559 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9562 (*c1
)->block
= c2
->block
;
9572 /* Generate IF chain. */
9573 if_st
= gfc_get_code (EXEC_IF
);
9575 for (body
= class_is
; body
; body
= body
->block
)
9577 new_st
->block
= gfc_get_code (EXEC_IF
);
9578 new_st
= new_st
->block
;
9579 /* Set up IF condition: Call _gfortran_is_extension_of. */
9580 new_st
->expr1
= gfc_get_expr ();
9581 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9582 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9583 new_st
->expr1
->ts
.kind
= 4;
9584 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9585 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9586 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9587 /* Set up arguments. */
9588 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9589 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9590 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9591 new_st
->expr1
->where
= code
->loc
;
9592 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9593 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9594 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9595 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9596 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9597 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9598 new_st
->next
= body
->next
;
9600 if (default_case
->next
)
9602 new_st
->block
= gfc_get_code (EXEC_IF
);
9603 new_st
= new_st
->block
;
9604 new_st
->next
= default_case
->next
;
9607 /* Replace CLASS DEFAULT code by the IF chain. */
9608 default_case
->next
= if_st
;
9611 /* Resolve the internal code. This cannot be done earlier because
9612 it requires that the sym->assoc of selectors is set already. */
9613 gfc_current_ns
= ns
;
9614 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9615 gfc_current_ns
= old_ns
;
9622 /* Resolve a SELECT RANK statement. */
9625 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9628 gfc_code
*body
, *new_st
, *tail
;
9630 char tname
[GFC_MAX_SYMBOL_LEN
];
9631 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9633 gfc_expr
*selector_expr
= NULL
;
9635 HOST_WIDE_INT charlen
= 0;
9637 ns
= code
->ext
.block
.ns
;
9640 code
->op
= EXEC_BLOCK
;
9643 gfc_association_list
* assoc
;
9645 assoc
= gfc_get_association_list ();
9646 assoc
->st
= code
->expr1
->symtree
;
9647 assoc
->target
= gfc_copy_expr (code
->expr2
);
9648 assoc
->target
->where
= code
->expr2
->where
;
9649 /* assoc->variable will be set by resolve_assoc_var. */
9651 code
->ext
.block
.assoc
= assoc
;
9652 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9654 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9657 code
->ext
.block
.assoc
= NULL
;
9659 /* Loop over RANK cases. Note that returning on the errors causes a
9660 cascade of further errors because the case blocks do not compile
9662 for (body
= code
->block
; body
; body
= body
->block
)
9664 c
= body
->ext
.block
.case_list
;
9666 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9670 /* Check for repeated cases. */
9671 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9673 gfc_case
*d
= tail
->ext
.block
.case_list
;
9679 /* Check F2018: C1153. */
9680 if (!c
->low
&& !d
->low
)
9681 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9682 &c
->where
, &d
->where
);
9684 if (!c
->low
|| !d
->low
)
9687 /* Check F2018: C1153. */
9688 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9689 if ((case_value
== case_value2
) && case_value
== -1)
9690 gfc_error ("RANK (*) at %L is repeated at %L",
9691 &c
->where
, &d
->where
);
9692 else if (case_value
== case_value2
)
9693 gfc_error ("RANK (%i) at %L is repeated at %L",
9694 case_value
, &c
->where
, &d
->where
);
9700 /* Check F2018: C1155. */
9701 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9702 || gfc_expr_attr (code
->expr1
).pointer
))
9703 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9704 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9706 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9707 || gfc_expr_attr (code
->expr1
).pointer
))
9708 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9709 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9712 /* Add EXEC_SELECT to switch on rank. */
9713 new_st
= gfc_get_code (code
->op
);
9714 new_st
->expr1
= code
->expr1
;
9715 new_st
->expr2
= code
->expr2
;
9716 new_st
->block
= code
->block
;
9717 code
->expr1
= code
->expr2
= NULL
;
9722 ns
->code
->next
= new_st
;
9724 code
->op
= EXEC_SELECT_RANK
;
9726 selector_expr
= code
->expr1
;
9728 /* Loop over SELECT RANK cases. */
9729 for (body
= code
->block
; body
; body
= body
->block
)
9731 c
= body
->ext
.block
.case_list
;
9734 /* Pass on the default case. */
9738 /* Associate temporary to selector. This should only be done
9739 when this case is actually true, so build a new ASSOCIATE
9740 that does precisely this here (instead of using the
9742 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9743 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9744 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9746 if (c
->ts
.type
== BT_CLASS
)
9747 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9748 else if (c
->ts
.type
== BT_DERIVED
)
9749 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9750 else if (c
->ts
.type
!= BT_CHARACTER
)
9751 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9753 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9754 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9756 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9757 if (case_value
>= 0)
9758 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9760 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9762 st
= gfc_find_symtree (ns
->sym_root
, name
);
9763 gcc_assert (st
->n
.sym
->assoc
);
9765 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9766 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9768 new_st
= gfc_get_code (EXEC_BLOCK
);
9769 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9770 new_st
->ext
.block
.ns
->code
= body
->next
;
9771 body
->next
= new_st
;
9773 /* Chain in the new list only if it is marked as dangling. Otherwise
9774 there is a CASE label overlap and this is already used. Just ignore,
9775 the error is diagnosed elsewhere. */
9776 if (st
->n
.sym
->assoc
->dangling
)
9778 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9779 st
->n
.sym
->assoc
->dangling
= 0;
9782 resolve_assoc_var (st
->n
.sym
, false);
9785 gfc_current_ns
= ns
;
9786 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9787 gfc_current_ns
= old_ns
;
9791 /* Resolve a transfer statement. This is making sure that:
9792 -- a derived type being transferred has only non-pointer components
9793 -- a derived type being transferred doesn't have private components, unless
9794 it's being transferred from the module where the type was defined
9795 -- we're not trying to transfer a whole assumed size array. */
9798 resolve_transfer (gfc_code
*code
)
9800 gfc_symbol
*sym
, *derived
;
9804 bool formatted
= false;
9805 gfc_dt
*dt
= code
->ext
.dt
;
9806 gfc_symbol
*dtio_sub
= NULL
;
9810 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9811 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9812 exp
= exp
->value
.op
.op1
;
9814 if (exp
&& exp
->expr_type
== EXPR_NULL
9817 gfc_error ("Invalid context for NULL () intrinsic at %L",
9822 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9823 && exp
->expr_type
!= EXPR_FUNCTION
9824 && exp
->expr_type
!= EXPR_STRUCTURE
))
9827 /* If we are reading, the variable will be changed. Note that
9828 code->ext.dt may be NULL if the TRANSFER is related to
9829 an INQUIRE statement -- but in this case, we are not reading, either. */
9830 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9831 && !gfc_check_vardef_context (exp
, false, false, false,
9835 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9836 || exp
->expr_type
== EXPR_FUNCTION
9837 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9839 /* Go to actual component transferred. */
9840 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9841 if (ref
->type
== REF_COMPONENT
)
9842 ts
= &ref
->u
.c
.component
->ts
;
9844 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9845 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9847 derived
= ts
->u
.derived
;
9849 /* Determine when to use the formatted DTIO procedure. */
9850 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9853 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9854 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9855 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9857 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9860 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9861 /* Check to see if this is a nested DTIO call, with the
9862 dummy as the io-list object. */
9863 if (sym
&& sym
== dtio_sub
&& sym
->formal
9864 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9865 && exp
->ref
== NULL
)
9867 if (!sym
->attr
.recursive
)
9869 gfc_error ("DTIO %s procedure at %L must be recursive",
9870 sym
->name
, &sym
->declared_at
);
9877 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9879 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9880 "it is processed by a defined input/output procedure",
9885 if (ts
->type
== BT_DERIVED
)
9887 /* Check that transferred derived type doesn't contain POINTER
9888 components unless it is processed by a defined input/output
9890 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9892 gfc_error ("Data transfer element at %L cannot have POINTER "
9893 "components unless it is processed by a defined "
9894 "input/output procedure", &code
->loc
);
9899 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9901 gfc_error ("Data transfer element at %L cannot have "
9902 "procedure pointer components", &code
->loc
);
9906 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9908 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9909 "components unless it is processed by a defined "
9910 "input/output procedure", &code
->loc
);
9914 /* C_PTR and C_FUNPTR have private components which means they cannot
9915 be printed. However, if -std=gnu and not -pedantic, allow
9916 the component to be printed to help debugging. */
9917 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9919 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9920 "cannot have PRIVATE components", &code
->loc
))
9923 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9925 gfc_error ("Data transfer element at %L cannot have "
9926 "PRIVATE components unless it is processed by "
9927 "a defined input/output procedure", &code
->loc
);
9932 if (exp
->expr_type
== EXPR_STRUCTURE
)
9935 sym
= exp
->symtree
->n
.sym
;
9937 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9938 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9940 gfc_error ("Data transfer element at %L cannot be a full reference to "
9941 "an assumed-size array", &code
->loc
);
9945 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9946 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9950 /*********** Toplevel code resolution subroutines ***********/
9952 /* Find the set of labels that are reachable from this block. We also
9953 record the last statement in each block. */
9956 find_reachable_labels (gfc_code
*block
)
9963 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9965 /* Collect labels in this block. We don't keep those corresponding
9966 to END {IF|SELECT}, these are checked in resolve_branch by going
9967 up through the code_stack. */
9968 for (c
= block
; c
; c
= c
->next
)
9970 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9971 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9974 /* Merge with labels from parent block. */
9977 gcc_assert (cs_base
->prev
->reachable_labels
);
9978 bitmap_ior_into (cs_base
->reachable_labels
,
9979 cs_base
->prev
->reachable_labels
);
9985 resolve_lock_unlock_event (gfc_code
*code
)
9987 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9988 && code
->expr1
->value
.function
.isym
9989 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9990 remove_caf_get_intrinsic (code
->expr1
);
9992 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9993 && (code
->expr1
->ts
.type
!= BT_DERIVED
9994 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9995 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9996 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9997 || code
->expr1
->rank
!= 0
9998 || (!gfc_is_coarray (code
->expr1
) &&
9999 !gfc_is_coindexed (code
->expr1
))))
10000 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
10001 &code
->expr1
->where
);
10002 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
10003 && (code
->expr1
->ts
.type
!= BT_DERIVED
10004 || code
->expr1
->expr_type
!= EXPR_VARIABLE
10005 || code
->expr1
->ts
.u
.derived
->from_intmod
10006 != INTMOD_ISO_FORTRAN_ENV
10007 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
10008 != ISOFORTRAN_EVENT_TYPE
10009 || code
->expr1
->rank
!= 0))
10010 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
10011 &code
->expr1
->where
);
10012 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
10013 && !gfc_is_coindexed (code
->expr1
))
10014 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
10015 &code
->expr1
->where
);
10016 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
10017 gfc_error ("Event variable argument at %L must be a coarray but not "
10018 "coindexed", &code
->expr1
->where
);
10022 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10023 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10024 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10025 &code
->expr2
->where
);
10028 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
10029 _("STAT variable")))
10032 /* Check ERRMSG. */
10034 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10035 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10036 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10037 &code
->expr3
->where
);
10040 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
10041 _("ERRMSG variable")))
10044 /* Check for LOCK the ACQUIRED_LOCK. */
10045 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10046 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
10047 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
10048 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
10049 "variable", &code
->expr4
->where
);
10051 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
10052 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
10053 _("ACQUIRED_LOCK variable")))
10056 /* Check for EVENT WAIT the UNTIL_COUNT. */
10057 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
10059 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
10060 || code
->expr4
->rank
!= 0)
10061 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
10062 "expression", &code
->expr4
->where
);
10068 resolve_critical (gfc_code
*code
)
10070 gfc_symtree
*symtree
;
10071 gfc_symbol
*lock_type
;
10072 char name
[GFC_MAX_SYMBOL_LEN
];
10073 static int serial
= 0;
10075 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
10078 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
10079 GFC_PREFIX ("lock_type"));
10081 lock_type
= symtree
->n
.sym
;
10084 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
10086 gcc_unreachable ();
10087 lock_type
= symtree
->n
.sym
;
10088 lock_type
->attr
.flavor
= FL_DERIVED
;
10089 lock_type
->attr
.zero_comp
= 1;
10090 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
10091 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
10094 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
10095 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
10096 gcc_unreachable ();
10098 code
->resolved_sym
= symtree
->n
.sym
;
10099 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10100 symtree
->n
.sym
->attr
.referenced
= 1;
10101 symtree
->n
.sym
->attr
.artificial
= 1;
10102 symtree
->n
.sym
->attr
.codimension
= 1;
10103 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
10104 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
10105 symtree
->n
.sym
->as
= gfc_get_array_spec ();
10106 symtree
->n
.sym
->as
->corank
= 1;
10107 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
10108 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
10109 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
10111 gfc_commit_symbols();
10116 resolve_sync (gfc_code
*code
)
10118 /* Check imageset. The * case matches expr1 == NULL. */
10121 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10122 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10123 "INTEGER expression", &code
->expr1
->where
);
10124 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10125 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10126 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10127 &code
->expr1
->where
);
10128 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10129 && gfc_simplify_expr (code
->expr1
, 0))
10131 gfc_constructor
*cons
;
10132 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10133 for (; cons
; cons
= gfc_constructor_next (cons
))
10134 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10135 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10136 gfc_error ("Imageset argument at %L must between 1 and "
10137 "num_images()", &cons
->expr
->where
);
10142 gfc_resolve_expr (code
->expr2
);
10144 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10145 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10146 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10147 &code
->expr2
->where
);
10149 /* Check ERRMSG. */
10150 gfc_resolve_expr (code
->expr3
);
10152 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10153 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10154 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10155 &code
->expr3
->where
);
10159 /* Given a branch to a label, see if the branch is conforming.
10160 The code node describes where the branch is located. */
10163 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10170 /* Step one: is this a valid branching target? */
10172 if (label
->defined
== ST_LABEL_UNKNOWN
)
10174 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10179 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10181 gfc_error ("Statement at %L is not a valid branch target statement "
10182 "for the branch statement at %L", &label
->where
, &code
->loc
);
10186 /* Step two: make sure this branch is not a branch to itself ;-) */
10188 if (code
->here
== label
)
10191 "Branch at %L may result in an infinite loop", &code
->loc
);
10195 /* Step three: See if the label is in the same block as the
10196 branching statement. The hard work has been done by setting up
10197 the bitmap reachable_labels. */
10199 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10201 /* Check now whether there is a CRITICAL construct; if so, check
10202 whether the label is still visible outside of the CRITICAL block,
10203 which is invalid. */
10204 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10206 if (stack
->current
->op
== EXEC_CRITICAL
10207 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10208 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10209 "label at %L", &code
->loc
, &label
->where
);
10210 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10211 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10212 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10213 "for label at %L", &code
->loc
, &label
->where
);
10219 /* Step four: If we haven't found the label in the bitmap, it may
10220 still be the label of the END of the enclosing block, in which
10221 case we find it by going up the code_stack. */
10223 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10225 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10227 if (stack
->current
->op
== EXEC_CRITICAL
)
10229 /* Note: A label at END CRITICAL does not leave the CRITICAL
10230 construct as END CRITICAL is still part of it. */
10231 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10232 " at %L", &code
->loc
, &label
->where
);
10235 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10237 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10238 "label at %L", &code
->loc
, &label
->where
);
10245 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10249 /* The label is not in an enclosing block, so illegal. This was
10250 allowed in Fortran 66, so we allow it as extension. No
10251 further checks are necessary in this case. */
10252 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10253 "as the GOTO statement at %L", &label
->where
,
10259 /* Check whether EXPR1 has the same shape as EXPR2. */
10262 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10264 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10265 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10266 bool result
= false;
10269 /* Compare the rank. */
10270 if (expr1
->rank
!= expr2
->rank
)
10273 /* Compare the size of each dimension. */
10274 for (i
=0; i
<expr1
->rank
; i
++)
10276 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10279 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10282 if (mpz_cmp (shape
[i
], shape2
[i
]))
10286 /* When either of the two expression is an assumed size array, we
10287 ignore the comparison of dimension sizes. */
10292 gfc_clear_shape (shape
, i
);
10293 gfc_clear_shape (shape2
, i
);
10298 /* Check whether a WHERE assignment target or a WHERE mask expression
10299 has the same shape as the outmost WHERE mask expression. */
10302 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10306 gfc_expr
*e
= NULL
;
10308 cblock
= code
->block
;
10310 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10311 In case of nested WHERE, only the outmost one is stored. */
10312 if (mask
== NULL
) /* outmost WHERE */
10314 else /* inner WHERE */
10321 /* Check if the mask-expr has a consistent shape with the
10322 outmost WHERE mask-expr. */
10323 if (!resolve_where_shape (cblock
->expr1
, e
))
10324 gfc_error ("WHERE mask at %L has inconsistent shape",
10325 &cblock
->expr1
->where
);
10328 /* the assignment statement of a WHERE statement, or the first
10329 statement in where-body-construct of a WHERE construct */
10330 cnext
= cblock
->next
;
10335 /* WHERE assignment statement */
10338 /* Check shape consistent for WHERE assignment target. */
10339 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10340 gfc_error ("WHERE assignment target at %L has "
10341 "inconsistent shape", &cnext
->expr1
->where
);
10345 case EXEC_ASSIGN_CALL
:
10346 resolve_call (cnext
);
10347 if (!cnext
->resolved_sym
->attr
.elemental
)
10348 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10349 &cnext
->ext
.actual
->expr
->where
);
10352 /* WHERE or WHERE construct is part of a where-body-construct */
10354 resolve_where (cnext
, e
);
10358 gfc_error ("Unsupported statement inside WHERE at %L",
10361 /* the next statement within the same where-body-construct */
10362 cnext
= cnext
->next
;
10364 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10365 cblock
= cblock
->block
;
10370 /* Resolve assignment in FORALL construct.
10371 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10372 FORALL index variables. */
10375 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10379 for (n
= 0; n
< nvar
; n
++)
10381 gfc_symbol
*forall_index
;
10383 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10385 /* Check whether the assignment target is one of the FORALL index
10387 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10388 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10389 gfc_error ("Assignment to a FORALL index variable at %L",
10390 &code
->expr1
->where
);
10393 /* If one of the FORALL index variables doesn't appear in the
10394 assignment variable, then there could be a many-to-one
10395 assignment. Emit a warning rather than an error because the
10396 mask could be resolving this problem. */
10397 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10398 gfc_warning (0, "The FORALL with index %qs is not used on the "
10399 "left side of the assignment at %L and so might "
10400 "cause multiple assignment to this object",
10401 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10407 /* Resolve WHERE statement in FORALL construct. */
10410 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10411 gfc_expr
**var_expr
)
10416 cblock
= code
->block
;
10419 /* the assignment statement of a WHERE statement, or the first
10420 statement in where-body-construct of a WHERE construct */
10421 cnext
= cblock
->next
;
10426 /* WHERE assignment statement */
10428 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10431 /* WHERE operator assignment statement */
10432 case EXEC_ASSIGN_CALL
:
10433 resolve_call (cnext
);
10434 if (!cnext
->resolved_sym
->attr
.elemental
)
10435 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10436 &cnext
->ext
.actual
->expr
->where
);
10439 /* WHERE or WHERE construct is part of a where-body-construct */
10441 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10445 gfc_error ("Unsupported statement inside WHERE at %L",
10448 /* the next statement within the same where-body-construct */
10449 cnext
= cnext
->next
;
10451 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10452 cblock
= cblock
->block
;
10457 /* Traverse the FORALL body to check whether the following errors exist:
10458 1. For assignment, check if a many-to-one assignment happens.
10459 2. For WHERE statement, check the WHERE body to see if there is any
10460 many-to-one assignment. */
10463 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10467 c
= code
->block
->next
;
10473 case EXEC_POINTER_ASSIGN
:
10474 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10477 case EXEC_ASSIGN_CALL
:
10481 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10482 there is no need to handle it here. */
10486 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10491 /* The next statement in the FORALL body. */
10497 /* Counts the number of iterators needed inside a forall construct, including
10498 nested forall constructs. This is used to allocate the needed memory
10499 in gfc_resolve_forall. */
10502 gfc_count_forall_iterators (gfc_code
*code
)
10504 int max_iters
, sub_iters
, current_iters
;
10505 gfc_forall_iterator
*fa
;
10507 gcc_assert(code
->op
== EXEC_FORALL
);
10511 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10514 code
= code
->block
->next
;
10518 if (code
->op
== EXEC_FORALL
)
10520 sub_iters
= gfc_count_forall_iterators (code
);
10521 if (sub_iters
> max_iters
)
10522 max_iters
= sub_iters
;
10527 return current_iters
+ max_iters
;
10531 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10532 gfc_resolve_forall_body to resolve the FORALL body. */
10535 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10537 static gfc_expr
**var_expr
;
10538 static int total_var
= 0;
10539 static int nvar
= 0;
10540 int i
, old_nvar
, tmp
;
10541 gfc_forall_iterator
*fa
;
10545 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10548 /* Start to resolve a FORALL construct */
10549 if (forall_save
== 0)
10551 /* Count the total number of FORALL indices in the nested FORALL
10552 construct in order to allocate the VAR_EXPR with proper size. */
10553 total_var
= gfc_count_forall_iterators (code
);
10555 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10556 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10559 /* The information about FORALL iterator, including FORALL indices start, end
10560 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10561 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10563 /* Fortran 20008: C738 (R753). */
10564 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10566 gfc_error ("FORALL index-name at %L must be a scalar variable "
10567 "of type integer", &fa
->var
->where
);
10571 /* Check if any outer FORALL index name is the same as the current
10573 for (i
= 0; i
< nvar
; i
++)
10575 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10576 gfc_error ("An outer FORALL construct already has an index "
10577 "with this name %L", &fa
->var
->where
);
10580 /* Record the current FORALL index. */
10581 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10585 /* No memory leak. */
10586 gcc_assert (nvar
<= total_var
);
10589 /* Resolve the FORALL body. */
10590 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10592 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10593 gfc_resolve_blocks (code
->block
, ns
);
10597 /* Free only the VAR_EXPRs allocated in this frame. */
10598 for (i
= nvar
; i
< tmp
; i
++)
10599 gfc_free_expr (var_expr
[i
]);
10603 /* We are in the outermost FORALL construct. */
10604 gcc_assert (forall_save
== 0);
10606 /* VAR_EXPR is not needed any more. */
10613 /* Resolve a BLOCK construct statement. */
10616 resolve_block_construct (gfc_code
* code
)
10618 /* Resolve the BLOCK's namespace. */
10619 gfc_resolve (code
->ext
.block
.ns
);
10621 /* For an ASSOCIATE block, the associations (and their targets) are already
10622 resolved during resolve_symbol. */
10626 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10630 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10634 for (; b
; b
= b
->block
)
10636 t
= gfc_resolve_expr (b
->expr1
);
10637 if (!gfc_resolve_expr (b
->expr2
))
10643 if (t
&& b
->expr1
!= NULL
10644 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10645 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10651 && b
->expr1
!= NULL
10652 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10653 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10658 resolve_branch (b
->label1
, b
);
10662 resolve_block_construct (b
);
10666 case EXEC_SELECT_TYPE
:
10667 case EXEC_SELECT_RANK
:
10670 case EXEC_DO_WHILE
:
10671 case EXEC_DO_CONCURRENT
:
10672 case EXEC_CRITICAL
:
10675 case EXEC_IOLENGTH
:
10679 case EXEC_OMP_ATOMIC
:
10680 case EXEC_OACC_ATOMIC
:
10682 gfc_omp_atomic_op aop
10683 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10685 /* Verify this before calling gfc_resolve_code, which might
10687 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10688 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10689 && b
->next
->next
== NULL
)
10690 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10691 && b
->next
->next
!= NULL
10692 && b
->next
->next
->op
== EXEC_ASSIGN
10693 && b
->next
->next
->next
== NULL
));
10697 case EXEC_OACC_PARALLEL_LOOP
:
10698 case EXEC_OACC_PARALLEL
:
10699 case EXEC_OACC_KERNELS_LOOP
:
10700 case EXEC_OACC_KERNELS
:
10701 case EXEC_OACC_SERIAL_LOOP
:
10702 case EXEC_OACC_SERIAL
:
10703 case EXEC_OACC_DATA
:
10704 case EXEC_OACC_HOST_DATA
:
10705 case EXEC_OACC_LOOP
:
10706 case EXEC_OACC_UPDATE
:
10707 case EXEC_OACC_WAIT
:
10708 case EXEC_OACC_CACHE
:
10709 case EXEC_OACC_ENTER_DATA
:
10710 case EXEC_OACC_EXIT_DATA
:
10711 case EXEC_OACC_ROUTINE
:
10712 case EXEC_OMP_CRITICAL
:
10713 case EXEC_OMP_DISTRIBUTE
:
10714 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10715 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10716 case EXEC_OMP_DISTRIBUTE_SIMD
:
10718 case EXEC_OMP_DO_SIMD
:
10719 case EXEC_OMP_MASTER
:
10720 case EXEC_OMP_ORDERED
:
10721 case EXEC_OMP_PARALLEL
:
10722 case EXEC_OMP_PARALLEL_DO
:
10723 case EXEC_OMP_PARALLEL_DO_SIMD
:
10724 case EXEC_OMP_PARALLEL_SECTIONS
:
10725 case EXEC_OMP_PARALLEL_WORKSHARE
:
10726 case EXEC_OMP_SECTIONS
:
10727 case EXEC_OMP_SIMD
:
10728 case EXEC_OMP_SINGLE
:
10729 case EXEC_OMP_TARGET
:
10730 case EXEC_OMP_TARGET_DATA
:
10731 case EXEC_OMP_TARGET_ENTER_DATA
:
10732 case EXEC_OMP_TARGET_EXIT_DATA
:
10733 case EXEC_OMP_TARGET_PARALLEL
:
10734 case EXEC_OMP_TARGET_PARALLEL_DO
:
10735 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10736 case EXEC_OMP_TARGET_SIMD
:
10737 case EXEC_OMP_TARGET_TEAMS
:
10738 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10739 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10740 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10741 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10742 case EXEC_OMP_TARGET_UPDATE
:
10743 case EXEC_OMP_TASK
:
10744 case EXEC_OMP_TASKGROUP
:
10745 case EXEC_OMP_TASKLOOP
:
10746 case EXEC_OMP_TASKLOOP_SIMD
:
10747 case EXEC_OMP_TASKWAIT
:
10748 case EXEC_OMP_TASKYIELD
:
10749 case EXEC_OMP_TEAMS
:
10750 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10751 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10752 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10753 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10754 case EXEC_OMP_WORKSHARE
:
10758 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10761 gfc_resolve_code (b
->next
, ns
);
10766 /* Does everything to resolve an ordinary assignment. Returns true
10767 if this is an interface assignment. */
10769 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10776 symbol_attribute attr
;
10778 if (gfc_extend_assign (code
, ns
))
10782 if (code
->op
== EXEC_ASSIGN_CALL
)
10784 lhs
= code
->ext
.actual
->expr
;
10785 rhsptr
= &code
->ext
.actual
->next
->expr
;
10789 gfc_actual_arglist
* args
;
10790 gfc_typebound_proc
* tbp
;
10792 gcc_assert (code
->op
== EXEC_COMPCALL
);
10794 args
= code
->expr1
->value
.compcall
.actual
;
10796 rhsptr
= &args
->next
->expr
;
10798 tbp
= code
->expr1
->value
.compcall
.tbp
;
10799 gcc_assert (!tbp
->is_generic
);
10802 /* Make a temporary rhs when there is a default initializer
10803 and rhs is the same symbol as the lhs. */
10804 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10805 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10806 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10807 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10808 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10816 if ((gfc_numeric_ts (&lhs
->ts
) || lhs
->ts
.type
== BT_LOGICAL
)
10817 && rhs
->ts
.type
== BT_CHARACTER
10818 && (rhs
->expr_type
!= EXPR_CONSTANT
|| !flag_dec_char_conversions
))
10820 /* Use of -fdec-char-conversions allows assignment of character data
10821 to non-character variables. This not permited for nonconstant
10823 gfc_error ("Cannot convert %s to %s at %L", gfc_typename (rhs
),
10824 gfc_typename (lhs
), &rhs
->where
);
10828 /* Handle the case of a BOZ literal on the RHS. */
10829 if (rhs
->ts
.type
== BT_BOZ
)
10831 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10832 "statement value nor an actual argument of "
10833 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10837 switch (lhs
->ts
.type
)
10840 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10844 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10848 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10853 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10855 HOST_WIDE_INT llen
= 0, rlen
= 0;
10856 if (lhs
->ts
.u
.cl
!= NULL
10857 && lhs
->ts
.u
.cl
->length
!= NULL
10858 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10859 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10861 if (rhs
->expr_type
== EXPR_CONSTANT
)
10862 rlen
= rhs
->value
.character
.length
;
10864 else if (rhs
->ts
.u
.cl
!= NULL
10865 && rhs
->ts
.u
.cl
->length
!= NULL
10866 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10867 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10869 if (rlen
&& llen
&& rlen
> llen
)
10870 gfc_warning_now (OPT_Wcharacter_truncation
,
10871 "CHARACTER expression will be truncated "
10872 "in assignment (%ld/%ld) at %L",
10873 (long) llen
, (long) rlen
, &code
->loc
);
10876 /* Ensure that a vector index expression for the lvalue is evaluated
10877 to a temporary if the lvalue symbol is referenced in it. */
10880 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10881 if (ref
->type
== REF_ARRAY
)
10883 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10884 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10885 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10886 ref
->u
.ar
.start
[n
]))
10888 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10892 if (gfc_pure (NULL
))
10894 if (lhs
->ts
.type
== BT_DERIVED
10895 && lhs
->expr_type
== EXPR_VARIABLE
10896 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10897 && rhs
->expr_type
== EXPR_VARIABLE
10898 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10899 || gfc_is_coindexed (rhs
)))
10901 /* F2008, C1283. */
10902 if (gfc_is_coindexed (rhs
))
10903 gfc_error ("Coindexed expression at %L is assigned to "
10904 "a derived type variable with a POINTER "
10905 "component in a PURE procedure",
10908 /* F2008, C1283 (4). */
10909 gfc_error ("In a pure subprogram an INTENT(IN) dummy argument "
10910 "shall not be used as the expr at %L of an intrinsic "
10911 "assignment statement in which the variable is of a "
10912 "derived type if the derived type has a pointer "
10913 "component at any level of component selection.",
10918 /* Fortran 2008, C1283. */
10919 if (gfc_is_coindexed (lhs
))
10921 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10922 "procedure", &rhs
->where
);
10927 if (gfc_implicit_pure (NULL
))
10929 if (lhs
->expr_type
== EXPR_VARIABLE
10930 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10931 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10932 gfc_unset_implicit_pure (NULL
);
10934 if (lhs
->ts
.type
== BT_DERIVED
10935 && lhs
->expr_type
== EXPR_VARIABLE
10936 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10937 && rhs
->expr_type
== EXPR_VARIABLE
10938 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10939 || gfc_is_coindexed (rhs
)))
10940 gfc_unset_implicit_pure (NULL
);
10942 /* Fortran 2008, C1283. */
10943 if (gfc_is_coindexed (lhs
))
10944 gfc_unset_implicit_pure (NULL
);
10947 /* F2008, 7.2.1.2. */
10948 attr
= gfc_expr_attr (lhs
);
10949 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10951 if (attr
.codimension
)
10953 gfc_error ("Assignment to polymorphic coarray at %L is not "
10954 "permitted", &lhs
->where
);
10957 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10958 "polymorphic variable at %L", &lhs
->where
))
10960 if (!flag_realloc_lhs
)
10962 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10963 "requires %<-frealloc-lhs%>", &lhs
->where
);
10967 else if (lhs
->ts
.type
== BT_CLASS
)
10969 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10970 "assignment at %L - check that there is a matching specific "
10971 "subroutine for '=' operator", &lhs
->where
);
10975 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10977 /* F2008, Section 7.2.1.2. */
10978 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10980 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10981 "component in assignment at %L", &lhs
->where
);
10985 /* Assign the 'data' of a class object to a derived type. */
10986 if (lhs
->ts
.type
== BT_DERIVED
10987 && rhs
->ts
.type
== BT_CLASS
10988 && rhs
->expr_type
!= EXPR_ARRAY
)
10989 gfc_add_data_component (rhs
);
10991 /* Make sure there is a vtable and, in particular, a _copy for the
10993 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10994 gfc_find_vtab (&rhs
->ts
);
10996 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10998 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10999 && code
->expr2
->value
.function
.isym
11000 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
11001 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
11002 && !gfc_expr_attr (rhs
).allocatable
11003 && !gfc_has_vector_subscript (rhs
)));
11005 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
11007 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
11008 Additionally, insert this code when the RHS is a CAF as we then use the
11009 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
11010 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
11011 noncoindexed array and the RHS is a coindexed scalar, use the normal code
11013 if (caf_convert_to_send
)
11015 if (code
->expr2
->expr_type
== EXPR_FUNCTION
11016 && code
->expr2
->value
.function
.isym
11017 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11018 remove_caf_get_intrinsic (code
->expr2
);
11019 code
->op
= EXEC_CALL
;
11020 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
11021 code
->resolved_sym
= code
->symtree
->n
.sym
;
11022 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
11023 code
->resolved_sym
->attr
.intrinsic
= 1;
11024 code
->resolved_sym
->attr
.subroutine
= 1;
11025 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
11026 gfc_commit_symbol (code
->resolved_sym
);
11027 code
->ext
.actual
= gfc_get_actual_arglist ();
11028 code
->ext
.actual
->expr
= lhs
;
11029 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
11030 code
->ext
.actual
->next
->expr
= rhs
;
11031 code
->expr1
= NULL
;
11032 code
->expr2
= NULL
;
11039 /* Add a component reference onto an expression. */
11042 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
11047 ref
= &((*ref
)->next
);
11048 *ref
= gfc_get_ref ();
11049 (*ref
)->type
= REF_COMPONENT
;
11050 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
11051 (*ref
)->u
.c
.component
= c
;
11054 /* Add a full array ref, as necessary. */
11057 gfc_add_full_array_ref (e
, c
->as
);
11058 e
->rank
= c
->as
->rank
;
11063 /* Build an assignment. Keep the argument 'op' for future use, so that
11064 pointer assignments can be made. */
11067 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
11068 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
11070 gfc_code
*this_code
;
11072 this_code
= gfc_get_code (op
);
11073 this_code
->next
= NULL
;
11074 this_code
->expr1
= gfc_copy_expr (expr1
);
11075 this_code
->expr2
= gfc_copy_expr (expr2
);
11076 this_code
->loc
= loc
;
11077 if (comp1
&& comp2
)
11079 add_comp_ref (this_code
->expr1
, comp1
);
11080 add_comp_ref (this_code
->expr2
, comp2
);
11087 /* Makes a temporary variable expression based on the characteristics of
11088 a given variable expression. */
11091 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
11093 static int serial
= 0;
11094 char name
[GFC_MAX_SYMBOL_LEN
];
11096 gfc_array_spec
*as
;
11097 gfc_array_ref
*aref
;
11100 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
11101 gfc_get_sym_tree (name
, ns
, &tmp
, false);
11102 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
11104 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
11105 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
11107 e
->value
.character
.length
);
11113 /* Obtain the arrayspec for the temporary. */
11114 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
11115 && e
->expr_type
!= EXPR_FUNCTION
11116 && e
->expr_type
!= EXPR_OP
)
11118 aref
= gfc_find_array_ref (e
);
11119 if (e
->expr_type
== EXPR_VARIABLE
11120 && e
->symtree
->n
.sym
->as
== aref
->as
)
11124 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11125 if (ref
->type
== REF_COMPONENT
11126 && ref
->u
.c
.component
->as
== aref
->as
)
11134 /* Add the attributes and the arrayspec to the temporary. */
11135 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11136 tmp
->n
.sym
->attr
.function
= 0;
11137 tmp
->n
.sym
->attr
.result
= 0;
11138 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11139 tmp
->n
.sym
->attr
.dummy
= 0;
11140 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11144 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11147 if (as
->type
== AS_DEFERRED
)
11148 tmp
->n
.sym
->attr
.allocatable
= 1;
11150 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11151 || e
->expr_type
== EXPR_FUNCTION
11152 || e
->expr_type
== EXPR_OP
))
11154 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11155 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11156 tmp
->n
.sym
->as
->rank
= e
->rank
;
11157 tmp
->n
.sym
->attr
.allocatable
= 1;
11158 tmp
->n
.sym
->attr
.dimension
= 1;
11161 tmp
->n
.sym
->attr
.dimension
= 0;
11163 gfc_set_sym_referenced (tmp
->n
.sym
);
11164 gfc_commit_symbol (tmp
->n
.sym
);
11165 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11167 /* Should the lhs be a section, use its array ref for the
11168 temporary expression. */
11169 if (aref
&& aref
->type
!= AR_FULL
)
11171 gfc_free_ref_list (e
->ref
);
11172 e
->ref
= gfc_copy_ref (ref
);
11178 /* Add one line of code to the code chain, making sure that 'head' and
11179 'tail' are appropriately updated. */
11182 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11184 gcc_assert (this_code
);
11186 *head
= *tail
= *this_code
;
11188 *tail
= gfc_append_code (*tail
, *this_code
);
11193 /* Counts the potential number of part array references that would
11194 result from resolution of typebound defined assignments. */
11197 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11200 int c_depth
= 0, t_depth
;
11202 for (c
= derived
->components
; c
; c
= c
->next
)
11204 if ((!gfc_bt_struct (c
->ts
.type
)
11206 || c
->attr
.allocatable
11207 || c
->attr
.proc_pointer_comp
11208 || c
->attr
.class_pointer
11209 || c
->attr
.proc_pointer
)
11210 && !c
->attr
.defined_assign_comp
)
11213 if (c
->as
&& c_depth
== 0)
11216 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11217 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11222 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11224 return depth
+ c_depth
;
11228 /* Implement 7.2.1.3 of the F08 standard:
11229 "An intrinsic assignment where the variable is of derived type is
11230 performed as if each component of the variable were assigned from the
11231 corresponding component of expr using pointer assignment (7.2.2) for
11232 each pointer component, defined assignment for each nonpointer
11233 nonallocatable component of a type that has a type-bound defined
11234 assignment consistent with the component, intrinsic assignment for
11235 each other nonpointer nonallocatable component, ..."
11237 The pointer assignments are taken care of by the intrinsic
11238 assignment of the structure itself. This function recursively adds
11239 defined assignments where required. The recursion is accomplished
11240 by calling gfc_resolve_code.
11242 When the lhs in a defined assignment has intent INOUT, we need a
11243 temporary for the lhs. In pseudo-code:
11245 ! Only call function lhs once.
11246 if (lhs is not a constant or an variable)
11249 ! Do the intrinsic assignment
11251 ! Now do the defined assignments
11252 do over components with typebound defined assignment [%cmp]
11253 #if one component's assignment procedure is INOUT
11255 #if expr2 non-variable
11261 t1%cmp {defined=} expr2%cmp
11267 expr1%cmp {defined=} expr2%cmp
11271 /* The temporary assignments have to be put on top of the additional
11272 code to avoid the result being changed by the intrinsic assignment.
11274 static int component_assignment_level
= 0;
11275 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11278 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11280 gfc_component
*comp1
, *comp2
;
11281 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11283 int error_count
, depth
;
11285 gfc_get_errors (NULL
, &error_count
);
11287 /* Filter out continuing processing after an error. */
11289 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11290 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11293 /* TODO: Handle more than one part array reference in assignments. */
11294 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11295 (*code
)->expr1
->rank
? 1 : 0);
11298 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11299 "done because multiple part array references would "
11300 "occur in intermediate expressions.", &(*code
)->loc
);
11304 component_assignment_level
++;
11306 /* Create a temporary so that functions get called only once. */
11307 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11308 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11310 gfc_expr
*tmp_expr
;
11312 /* Assign the rhs to the temporary. */
11313 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11314 this_code
= build_assignment (EXEC_ASSIGN
,
11315 tmp_expr
, (*code
)->expr2
,
11316 NULL
, NULL
, (*code
)->loc
);
11317 /* Add the code and substitute the rhs expression. */
11318 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11319 gfc_free_expr ((*code
)->expr2
);
11320 (*code
)->expr2
= tmp_expr
;
11323 /* Do the intrinsic assignment. This is not needed if the lhs is one
11324 of the temporaries generated here, since the intrinsic assignment
11325 to the final result already does this. */
11326 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11328 this_code
= build_assignment (EXEC_ASSIGN
,
11329 (*code
)->expr1
, (*code
)->expr2
,
11330 NULL
, NULL
, (*code
)->loc
);
11331 add_code_to_chain (&this_code
, &head
, &tail
);
11334 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11335 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11338 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11340 bool inout
= false;
11342 /* The intrinsic assignment does the right thing for pointers
11343 of all kinds and allocatable components. */
11344 if (!gfc_bt_struct (comp1
->ts
.type
)
11345 || comp1
->attr
.pointer
11346 || comp1
->attr
.allocatable
11347 || comp1
->attr
.proc_pointer_comp
11348 || comp1
->attr
.class_pointer
11349 || comp1
->attr
.proc_pointer
)
11352 /* Make an assigment for this component. */
11353 this_code
= build_assignment (EXEC_ASSIGN
,
11354 (*code
)->expr1
, (*code
)->expr2
,
11355 comp1
, comp2
, (*code
)->loc
);
11357 /* Convert the assignment if there is a defined assignment for
11358 this type. Otherwise, using the call from gfc_resolve_code,
11359 recurse into its components. */
11360 gfc_resolve_code (this_code
, ns
);
11362 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11364 gfc_formal_arglist
*dummy_args
;
11366 /* Check that there is a typebound defined assignment. If not,
11367 then this must be a module defined assignment. We cannot
11368 use the defined_assign_comp attribute here because it must
11369 be this derived type that has the defined assignment and not
11371 if (!(comp1
->ts
.u
.derived
->f2k_derived
11372 && comp1
->ts
.u
.derived
->f2k_derived
11373 ->tb_op
[INTRINSIC_ASSIGN
]))
11375 gfc_free_statements (this_code
);
11380 /* If the first argument of the subroutine has intent INOUT
11381 a temporary must be generated and used instead. */
11382 rsym
= this_code
->resolved_sym
;
11383 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11385 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11387 gfc_code
*temp_code
;
11390 /* Build the temporary required for the assignment and put
11391 it at the head of the generated code. */
11394 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11395 temp_code
= build_assignment (EXEC_ASSIGN
,
11396 t1
, (*code
)->expr1
,
11397 NULL
, NULL
, (*code
)->loc
);
11399 /* For allocatable LHS, check whether it is allocated. Note
11400 that allocatable components with defined assignment are
11401 not yet support. See PR 57696. */
11402 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11406 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11407 block
= gfc_get_code (EXEC_IF
);
11408 block
->block
= gfc_get_code (EXEC_IF
);
11409 block
->block
->expr1
11410 = gfc_build_intrinsic_call (ns
,
11411 GFC_ISYM_ALLOCATED
, "allocated",
11412 (*code
)->loc
, 1, e
);
11413 block
->block
->next
= temp_code
;
11416 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11419 /* Replace the first actual arg with the component of the
11421 gfc_free_expr (this_code
->ext
.actual
->expr
);
11422 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11423 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11425 /* If the LHS variable is allocatable and wasn't allocated and
11426 the temporary is allocatable, pointer assign the address of
11427 the freshly allocated LHS to the temporary. */
11428 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11429 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11434 cond
= gfc_get_expr ();
11435 cond
->ts
.type
= BT_LOGICAL
;
11436 cond
->ts
.kind
= gfc_default_logical_kind
;
11437 cond
->expr_type
= EXPR_OP
;
11438 cond
->where
= (*code
)->loc
;
11439 cond
->value
.op
.op
= INTRINSIC_NOT
;
11440 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11441 GFC_ISYM_ALLOCATED
, "allocated",
11442 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11443 block
= gfc_get_code (EXEC_IF
);
11444 block
->block
= gfc_get_code (EXEC_IF
);
11445 block
->block
->expr1
= cond
;
11446 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11447 t1
, (*code
)->expr1
,
11448 NULL
, NULL
, (*code
)->loc
);
11449 add_code_to_chain (&block
, &head
, &tail
);
11453 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11455 /* Don't add intrinsic assignments since they are already
11456 effected by the intrinsic assignment of the structure. */
11457 gfc_free_statements (this_code
);
11462 add_code_to_chain (&this_code
, &head
, &tail
);
11466 /* Transfer the value to the final result. */
11467 this_code
= build_assignment (EXEC_ASSIGN
,
11468 (*code
)->expr1
, t1
,
11469 comp1
, comp2
, (*code
)->loc
);
11470 add_code_to_chain (&this_code
, &head
, &tail
);
11474 /* Put the temporary assignments at the top of the generated code. */
11475 if (tmp_head
&& component_assignment_level
== 1)
11477 gfc_append_code (tmp_head
, head
);
11479 tmp_head
= tmp_tail
= NULL
;
11482 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11483 // not accidentally deallocated. Hence, nullify t1.
11484 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11485 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11491 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11492 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11493 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11494 block
= gfc_get_code (EXEC_IF
);
11495 block
->block
= gfc_get_code (EXEC_IF
);
11496 block
->block
->expr1
= cond
;
11497 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11498 t1
, gfc_get_null_expr (&(*code
)->loc
),
11499 NULL
, NULL
, (*code
)->loc
);
11500 gfc_append_code (tail
, block
);
11504 /* Now attach the remaining code chain to the input code. Step on
11505 to the end of the new code since resolution is complete. */
11506 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11507 tail
->next
= (*code
)->next
;
11508 /* Overwrite 'code' because this would place the intrinsic assignment
11509 before the temporary for the lhs is created. */
11510 gfc_free_expr ((*code
)->expr1
);
11511 gfc_free_expr ((*code
)->expr2
);
11517 component_assignment_level
--;
11521 /* F2008: Pointer function assignments are of the form:
11522 ptr_fcn (args) = expr
11523 This function breaks these assignments into two statements:
11524 temporary_pointer => ptr_fcn(args)
11525 temporary_pointer = expr */
11528 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11530 gfc_expr
*tmp_ptr_expr
;
11531 gfc_code
*this_code
;
11532 gfc_component
*comp
;
11535 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11538 /* Even if standard does not support this feature, continue to build
11539 the two statements to avoid upsetting frontend_passes.c. */
11540 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11541 "%L", &(*code
)->loc
);
11543 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11546 s
= comp
->ts
.interface
;
11548 s
= (*code
)->expr1
->symtree
->n
.sym
;
11550 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11552 gfc_error ("The function result on the lhs of the assignment at "
11553 "%L must have the pointer attribute.",
11554 &(*code
)->expr1
->where
);
11555 (*code
)->op
= EXEC_NOP
;
11559 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11561 /* get_temp_from_expression is set up for ordinary assignments. To that
11562 end, where array bounds are not known, arrays are made allocatable.
11563 Change the temporary to a pointer here. */
11564 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11565 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11566 tmp_ptr_expr
->where
= (*code
)->loc
;
11568 this_code
= build_assignment (EXEC_ASSIGN
,
11569 tmp_ptr_expr
, (*code
)->expr2
,
11570 NULL
, NULL
, (*code
)->loc
);
11571 this_code
->next
= (*code
)->next
;
11572 (*code
)->next
= this_code
;
11573 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11574 (*code
)->expr2
= (*code
)->expr1
;
11575 (*code
)->expr1
= tmp_ptr_expr
;
11581 /* Deferred character length assignments from an operator expression
11582 require a temporary because the character length of the lhs can
11583 change in the course of the assignment. */
11586 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11588 gfc_expr
*tmp_expr
;
11589 gfc_code
*this_code
;
11591 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11592 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11593 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11596 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11599 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11602 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11603 tmp_expr
->where
= (*code
)->loc
;
11605 /* A new charlen is required to ensure that the variable string
11606 length is different to that of the original lhs. */
11607 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11608 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11609 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11610 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11612 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11614 this_code
= build_assignment (EXEC_ASSIGN
,
11616 gfc_copy_expr (tmp_expr
),
11617 NULL
, NULL
, (*code
)->loc
);
11619 (*code
)->expr1
= tmp_expr
;
11621 this_code
->next
= (*code
)->next
;
11622 (*code
)->next
= this_code
;
11628 /* Given a block of code, recursively resolve everything pointed to by this
11632 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11634 int omp_workshare_save
;
11635 int forall_save
, do_concurrent_save
;
11639 frame
.prev
= cs_base
;
11643 find_reachable_labels (code
);
11645 for (; code
; code
= code
->next
)
11647 frame
.current
= code
;
11648 forall_save
= forall_flag
;
11649 do_concurrent_save
= gfc_do_concurrent_flag
;
11651 if (code
->op
== EXEC_FORALL
)
11654 gfc_resolve_forall (code
, ns
, forall_save
);
11657 else if (code
->block
)
11659 omp_workshare_save
= -1;
11662 case EXEC_OACC_PARALLEL_LOOP
:
11663 case EXEC_OACC_PARALLEL
:
11664 case EXEC_OACC_KERNELS_LOOP
:
11665 case EXEC_OACC_KERNELS
:
11666 case EXEC_OACC_SERIAL_LOOP
:
11667 case EXEC_OACC_SERIAL
:
11668 case EXEC_OACC_DATA
:
11669 case EXEC_OACC_HOST_DATA
:
11670 case EXEC_OACC_LOOP
:
11671 gfc_resolve_oacc_blocks (code
, ns
);
11673 case EXEC_OMP_PARALLEL_WORKSHARE
:
11674 omp_workshare_save
= omp_workshare_flag
;
11675 omp_workshare_flag
= 1;
11676 gfc_resolve_omp_parallel_blocks (code
, ns
);
11678 case EXEC_OMP_PARALLEL
:
11679 case EXEC_OMP_PARALLEL_DO
:
11680 case EXEC_OMP_PARALLEL_DO_SIMD
:
11681 case EXEC_OMP_PARALLEL_SECTIONS
:
11682 case EXEC_OMP_TARGET_PARALLEL
:
11683 case EXEC_OMP_TARGET_PARALLEL_DO
:
11684 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11685 case EXEC_OMP_TARGET_TEAMS
:
11686 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11687 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11688 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11689 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11690 case EXEC_OMP_TASK
:
11691 case EXEC_OMP_TASKLOOP
:
11692 case EXEC_OMP_TASKLOOP_SIMD
:
11693 case EXEC_OMP_TEAMS
:
11694 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11695 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11696 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11697 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11698 omp_workshare_save
= omp_workshare_flag
;
11699 omp_workshare_flag
= 0;
11700 gfc_resolve_omp_parallel_blocks (code
, ns
);
11702 case EXEC_OMP_DISTRIBUTE
:
11703 case EXEC_OMP_DISTRIBUTE_SIMD
:
11705 case EXEC_OMP_DO_SIMD
:
11706 case EXEC_OMP_SIMD
:
11707 case EXEC_OMP_TARGET_SIMD
:
11708 gfc_resolve_omp_do_blocks (code
, ns
);
11710 case EXEC_SELECT_TYPE
:
11711 /* Blocks are handled in resolve_select_type because we have
11712 to transform the SELECT TYPE into ASSOCIATE first. */
11714 case EXEC_DO_CONCURRENT
:
11715 gfc_do_concurrent_flag
= 1;
11716 gfc_resolve_blocks (code
->block
, ns
);
11717 gfc_do_concurrent_flag
= 2;
11719 case EXEC_OMP_WORKSHARE
:
11720 omp_workshare_save
= omp_workshare_flag
;
11721 omp_workshare_flag
= 1;
11724 gfc_resolve_blocks (code
->block
, ns
);
11728 if (omp_workshare_save
!= -1)
11729 omp_workshare_flag
= omp_workshare_save
;
11733 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11734 t
= gfc_resolve_expr (code
->expr1
);
11735 forall_flag
= forall_save
;
11736 gfc_do_concurrent_flag
= do_concurrent_save
;
11738 if (!gfc_resolve_expr (code
->expr2
))
11741 if (code
->op
== EXEC_ALLOCATE
11742 && !gfc_resolve_expr (code
->expr3
))
11748 case EXEC_END_BLOCK
:
11749 case EXEC_END_NESTED_BLOCK
:
11753 case EXEC_ERROR_STOP
:
11755 case EXEC_CONTINUE
:
11757 case EXEC_ASSIGN_CALL
:
11760 case EXEC_CRITICAL
:
11761 resolve_critical (code
);
11764 case EXEC_SYNC_ALL
:
11765 case EXEC_SYNC_IMAGES
:
11766 case EXEC_SYNC_MEMORY
:
11767 resolve_sync (code
);
11772 case EXEC_EVENT_POST
:
11773 case EXEC_EVENT_WAIT
:
11774 resolve_lock_unlock_event (code
);
11777 case EXEC_FAIL_IMAGE
:
11778 case EXEC_FORM_TEAM
:
11779 case EXEC_CHANGE_TEAM
:
11780 case EXEC_END_TEAM
:
11781 case EXEC_SYNC_TEAM
:
11785 /* Keep track of which entry we are up to. */
11786 current_entry_id
= code
->ext
.entry
->id
;
11790 resolve_where (code
, NULL
);
11794 if (code
->expr1
!= NULL
)
11796 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11797 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11798 "INTEGER variable", &code
->expr1
->where
);
11799 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11800 gfc_error ("Variable %qs has not been assigned a target "
11801 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11802 &code
->expr1
->where
);
11805 resolve_branch (code
->label1
, code
);
11809 if (code
->expr1
!= NULL
11810 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11811 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11812 "INTEGER return specifier", &code
->expr1
->where
);
11815 case EXEC_INIT_ASSIGN
:
11816 case EXEC_END_PROCEDURE
:
11823 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11825 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11826 && code
->expr1
->value
.function
.isym
11827 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11828 remove_caf_get_intrinsic (code
->expr1
);
11830 /* If this is a pointer function in an lvalue variable context,
11831 the new code will have to be resolved afresh. This is also the
11832 case with an error, where the code is transformed into NOP to
11833 prevent ICEs downstream. */
11834 if (resolve_ptr_fcn_assign (&code
, ns
)
11835 || code
->op
== EXEC_NOP
)
11838 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11842 if (resolve_ordinary_assign (code
, ns
))
11844 if (code
->op
== EXEC_COMPCALL
)
11850 /* Check for dependencies in deferred character length array
11851 assignments and generate a temporary, if necessary. */
11852 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11855 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11856 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11857 && code
->expr1
->ts
.u
.derived
11858 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11859 generate_component_assignments (&code
, ns
);
11863 case EXEC_LABEL_ASSIGN
:
11864 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11865 gfc_error ("Label %d referenced at %L is never defined",
11866 code
->label1
->value
, &code
->label1
->where
);
11868 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11869 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11870 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11871 != gfc_default_integer_kind
11872 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11873 gfc_error ("ASSIGN statement at %L requires a scalar "
11874 "default INTEGER variable", &code
->expr1
->where
);
11877 case EXEC_POINTER_ASSIGN
:
11884 /* This is both a variable definition and pointer assignment
11885 context, so check both of them. For rank remapping, a final
11886 array ref may be present on the LHS and fool gfc_expr_attr
11887 used in gfc_check_vardef_context. Remove it. */
11888 e
= remove_last_array_ref (code
->expr1
);
11889 t
= gfc_check_vardef_context (e
, true, false, false,
11890 _("pointer assignment"));
11892 t
= gfc_check_vardef_context (e
, false, false, false,
11893 _("pointer assignment"));
11896 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11901 /* Assigning a class object always is a regular assign. */
11902 if (code
->expr2
->ts
.type
== BT_CLASS
11903 && code
->expr1
->ts
.type
== BT_CLASS
11904 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11905 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11906 && code
->expr2
->expr_type
== EXPR_VARIABLE
11907 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11909 code
->op
= EXEC_ASSIGN
;
11913 case EXEC_ARITHMETIC_IF
:
11915 gfc_expr
*e
= code
->expr1
;
11917 gfc_resolve_expr (e
);
11918 if (e
->expr_type
== EXPR_NULL
)
11919 gfc_error ("Invalid NULL at %L", &e
->where
);
11921 if (t
&& (e
->rank
> 0
11922 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11923 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11924 "REAL or INTEGER expression", &e
->where
);
11926 resolve_branch (code
->label1
, code
);
11927 resolve_branch (code
->label2
, code
);
11928 resolve_branch (code
->label3
, code
);
11933 if (t
&& code
->expr1
!= NULL
11934 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11935 || code
->expr1
->rank
!= 0))
11936 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11937 &code
->expr1
->where
);
11942 resolve_call (code
);
11945 case EXEC_COMPCALL
:
11947 resolve_typebound_subroutine (code
);
11950 case EXEC_CALL_PPC
:
11951 resolve_ppc_call (code
);
11955 /* Select is complicated. Also, a SELECT construct could be
11956 a transformed computed GOTO. */
11957 resolve_select (code
, false);
11960 case EXEC_SELECT_TYPE
:
11961 resolve_select_type (code
, ns
);
11964 case EXEC_SELECT_RANK
:
11965 resolve_select_rank (code
, ns
);
11969 resolve_block_construct (code
);
11973 if (code
->ext
.iterator
!= NULL
)
11975 gfc_iterator
*iter
= code
->ext
.iterator
;
11976 if (gfc_resolve_iterator (iter
, true, false))
11977 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11982 case EXEC_DO_WHILE
:
11983 if (code
->expr1
== NULL
)
11984 gfc_internal_error ("gfc_resolve_code(): No expression on "
11987 && (code
->expr1
->rank
!= 0
11988 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11989 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11990 "a scalar LOGICAL expression", &code
->expr1
->where
);
11993 case EXEC_ALLOCATE
:
11995 resolve_allocate_deallocate (code
, "ALLOCATE");
11999 case EXEC_DEALLOCATE
:
12001 resolve_allocate_deallocate (code
, "DEALLOCATE");
12006 if (!gfc_resolve_open (code
->ext
.open
))
12009 resolve_branch (code
->ext
.open
->err
, code
);
12013 if (!gfc_resolve_close (code
->ext
.close
))
12016 resolve_branch (code
->ext
.close
->err
, code
);
12019 case EXEC_BACKSPACE
:
12023 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
12026 resolve_branch (code
->ext
.filepos
->err
, code
);
12030 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12033 resolve_branch (code
->ext
.inquire
->err
, code
);
12036 case EXEC_IOLENGTH
:
12037 gcc_assert (code
->ext
.inquire
!= NULL
);
12038 if (!gfc_resolve_inquire (code
->ext
.inquire
))
12041 resolve_branch (code
->ext
.inquire
->err
, code
);
12045 if (!gfc_resolve_wait (code
->ext
.wait
))
12048 resolve_branch (code
->ext
.wait
->err
, code
);
12049 resolve_branch (code
->ext
.wait
->end
, code
);
12050 resolve_branch (code
->ext
.wait
->eor
, code
);
12055 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
12058 resolve_branch (code
->ext
.dt
->err
, code
);
12059 resolve_branch (code
->ext
.dt
->end
, code
);
12060 resolve_branch (code
->ext
.dt
->eor
, code
);
12063 case EXEC_TRANSFER
:
12064 resolve_transfer (code
);
12067 case EXEC_DO_CONCURRENT
:
12069 resolve_forall_iterators (code
->ext
.forall_iterator
);
12071 if (code
->expr1
!= NULL
12072 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
12073 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
12074 "expression", &code
->expr1
->where
);
12077 case EXEC_OACC_PARALLEL_LOOP
:
12078 case EXEC_OACC_PARALLEL
:
12079 case EXEC_OACC_KERNELS_LOOP
:
12080 case EXEC_OACC_KERNELS
:
12081 case EXEC_OACC_SERIAL_LOOP
:
12082 case EXEC_OACC_SERIAL
:
12083 case EXEC_OACC_DATA
:
12084 case EXEC_OACC_HOST_DATA
:
12085 case EXEC_OACC_LOOP
:
12086 case EXEC_OACC_UPDATE
:
12087 case EXEC_OACC_WAIT
:
12088 case EXEC_OACC_CACHE
:
12089 case EXEC_OACC_ENTER_DATA
:
12090 case EXEC_OACC_EXIT_DATA
:
12091 case EXEC_OACC_ATOMIC
:
12092 case EXEC_OACC_DECLARE
:
12093 gfc_resolve_oacc_directive (code
, ns
);
12096 case EXEC_OMP_ATOMIC
:
12097 case EXEC_OMP_BARRIER
:
12098 case EXEC_OMP_CANCEL
:
12099 case EXEC_OMP_CANCELLATION_POINT
:
12100 case EXEC_OMP_CRITICAL
:
12101 case EXEC_OMP_FLUSH
:
12102 case EXEC_OMP_DISTRIBUTE
:
12103 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
12104 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
12105 case EXEC_OMP_DISTRIBUTE_SIMD
:
12107 case EXEC_OMP_DO_SIMD
:
12108 case EXEC_OMP_MASTER
:
12109 case EXEC_OMP_ORDERED
:
12110 case EXEC_OMP_SECTIONS
:
12111 case EXEC_OMP_SIMD
:
12112 case EXEC_OMP_SINGLE
:
12113 case EXEC_OMP_TARGET
:
12114 case EXEC_OMP_TARGET_DATA
:
12115 case EXEC_OMP_TARGET_ENTER_DATA
:
12116 case EXEC_OMP_TARGET_EXIT_DATA
:
12117 case EXEC_OMP_TARGET_PARALLEL
:
12118 case EXEC_OMP_TARGET_PARALLEL_DO
:
12119 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
12120 case EXEC_OMP_TARGET_SIMD
:
12121 case EXEC_OMP_TARGET_TEAMS
:
12122 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
12123 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12124 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12125 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
12126 case EXEC_OMP_TARGET_UPDATE
:
12127 case EXEC_OMP_TASK
:
12128 case EXEC_OMP_TASKGROUP
:
12129 case EXEC_OMP_TASKLOOP
:
12130 case EXEC_OMP_TASKLOOP_SIMD
:
12131 case EXEC_OMP_TASKWAIT
:
12132 case EXEC_OMP_TASKYIELD
:
12133 case EXEC_OMP_TEAMS
:
12134 case EXEC_OMP_TEAMS_DISTRIBUTE
:
12135 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
12136 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
12137 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12138 case EXEC_OMP_WORKSHARE
:
12139 gfc_resolve_omp_directive (code
, ns
);
12142 case EXEC_OMP_PARALLEL
:
12143 case EXEC_OMP_PARALLEL_DO
:
12144 case EXEC_OMP_PARALLEL_DO_SIMD
:
12145 case EXEC_OMP_PARALLEL_SECTIONS
:
12146 case EXEC_OMP_PARALLEL_WORKSHARE
:
12147 omp_workshare_save
= omp_workshare_flag
;
12148 omp_workshare_flag
= 0;
12149 gfc_resolve_omp_directive (code
, ns
);
12150 omp_workshare_flag
= omp_workshare_save
;
12154 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12158 cs_base
= frame
.prev
;
12162 /* Resolve initial values and make sure they are compatible with
12166 resolve_values (gfc_symbol
*sym
)
12170 if (sym
->value
== NULL
)
12173 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12174 t
= resolve_structure_cons (sym
->value
, 1);
12176 t
= gfc_resolve_expr (sym
->value
);
12181 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12185 /* Verify any BIND(C) derived types in the namespace so we can report errors
12186 for them once, rather than for each variable declared of that type. */
12189 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12191 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12192 && derived_sym
->attr
.is_bind_c
== 1)
12193 verify_bind_c_derived_type (derived_sym
);
12199 /* Check the interfaces of DTIO procedures associated with derived
12200 type 'sym'. These procedures can either have typebound bindings or
12201 can appear in DTIO generic interfaces. */
12204 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12206 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12209 gfc_check_dtio_interfaces (sym
);
12214 /* Verify that any binding labels used in a given namespace do not collide
12215 with the names or binding labels of any global symbols. Multiple INTERFACE
12216 for the same procedure are permitted. */
12219 gfc_verify_binding_labels (gfc_symbol
*sym
)
12222 const char *module
;
12224 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12225 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12228 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12231 module
= sym
->module
;
12232 else if (sym
->ns
&& sym
->ns
->proc_name
12233 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12234 module
= sym
->ns
->proc_name
->name
;
12235 else if (sym
->ns
&& sym
->ns
->parent
12236 && sym
->ns
&& sym
->ns
->parent
->proc_name
12237 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12238 module
= sym
->ns
->parent
->proc_name
->name
;
12244 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12247 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12248 gsym
->where
= sym
->declared_at
;
12249 gsym
->sym_name
= sym
->name
;
12250 gsym
->binding_label
= sym
->binding_label
;
12251 gsym
->ns
= sym
->ns
;
12252 gsym
->mod_name
= module
;
12253 if (sym
->attr
.function
)
12254 gsym
->type
= GSYM_FUNCTION
;
12255 else if (sym
->attr
.subroutine
)
12256 gsym
->type
= GSYM_SUBROUTINE
;
12257 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12258 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12262 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12264 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12265 "identifier as entity at %L", sym
->name
,
12266 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12267 /* Clear the binding label to prevent checking multiple times. */
12268 sym
->binding_label
= NULL
;
12272 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12273 && (strcmp (module
, gsym
->mod_name
) != 0
12274 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12276 /* This can only happen if the variable is defined in a module - if it
12277 isn't the same module, reject it. */
12278 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12279 "uses the same global identifier as entity at %L from module %qs",
12280 sym
->name
, module
, sym
->binding_label
,
12281 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12282 sym
->binding_label
= NULL
;
12286 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12287 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12288 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12289 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12290 && (module
!= gsym
->mod_name
12291 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12292 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12294 /* Print an error if the procedure is defined multiple times; we have to
12295 exclude references to the same procedure via module association or
12296 multiple checks for the same procedure. */
12297 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12298 "global identifier as entity at %L", sym
->name
,
12299 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12300 sym
->binding_label
= NULL
;
12305 /* Resolve an index expression. */
12308 resolve_index_expr (gfc_expr
*e
)
12310 if (!gfc_resolve_expr (e
))
12313 if (!gfc_simplify_expr (e
, 0))
12316 if (!gfc_specification_expr (e
))
12323 /* Resolve a charlen structure. */
12326 resolve_charlen (gfc_charlen
*cl
)
12329 bool saved_specification_expr
;
12335 saved_specification_expr
= specification_expr
;
12336 specification_expr
= true;
12338 if (cl
->length_from_typespec
)
12340 if (!gfc_resolve_expr (cl
->length
))
12342 specification_expr
= saved_specification_expr
;
12346 if (!gfc_simplify_expr (cl
->length
, 0))
12348 specification_expr
= saved_specification_expr
;
12352 /* cl->length has been resolved. It should have an integer type. */
12353 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12355 gfc_error ("Scalar INTEGER expression expected at %L",
12356 &cl
->length
->where
);
12362 if (!resolve_index_expr (cl
->length
))
12364 specification_expr
= saved_specification_expr
;
12369 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12370 a negative value, the length of character entities declared is zero. */
12371 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12372 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12373 gfc_replace_expr (cl
->length
,
12374 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12376 /* Check that the character length is not too large. */
12377 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12378 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12379 && cl
->length
->ts
.type
== BT_INTEGER
12380 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12382 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12383 specification_expr
= saved_specification_expr
;
12387 specification_expr
= saved_specification_expr
;
12392 /* Test for non-constant shape arrays. */
12395 is_non_constant_shape_array (gfc_symbol
*sym
)
12401 not_constant
= false;
12402 if (sym
->as
!= NULL
)
12404 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12405 has not been simplified; parameter array references. Do the
12406 simplification now. */
12407 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12409 if (i
== GFC_MAX_DIMENSIONS
)
12412 e
= sym
->as
->lower
[i
];
12413 if (e
&& (!resolve_index_expr(e
)
12414 || !gfc_is_constant_expr (e
)))
12415 not_constant
= true;
12416 e
= sym
->as
->upper
[i
];
12417 if (e
&& (!resolve_index_expr(e
)
12418 || !gfc_is_constant_expr (e
)))
12419 not_constant
= true;
12422 return not_constant
;
12425 /* Given a symbol and an initialization expression, add code to initialize
12426 the symbol to the function entry. */
12428 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12432 gfc_namespace
*ns
= sym
->ns
;
12434 /* Search for the function namespace if this is a contained
12435 function without an explicit result. */
12436 if (sym
->attr
.function
&& sym
== sym
->result
12437 && sym
->name
!= sym
->ns
->proc_name
->name
)
12439 ns
= ns
->contained
;
12440 for (;ns
; ns
= ns
->sibling
)
12441 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12447 gfc_free_expr (init
);
12451 /* Build an l-value expression for the result. */
12452 lval
= gfc_lval_expr_from_sym (sym
);
12454 /* Add the code at scope entry. */
12455 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12456 init_st
->next
= ns
->code
;
12457 ns
->code
= init_st
;
12459 /* Assign the default initializer to the l-value. */
12460 init_st
->loc
= sym
->declared_at
;
12461 init_st
->expr1
= lval
;
12462 init_st
->expr2
= init
;
12466 /* Whether or not we can generate a default initializer for a symbol. */
12469 can_generate_init (gfc_symbol
*sym
)
12471 symbol_attribute
*a
;
12476 /* These symbols should never have a default initialization. */
12481 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12482 && (CLASS_DATA (sym
)->attr
.class_pointer
12483 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12484 || a
->in_equivalence
12491 || (!a
->referenced
&& !a
->result
)
12492 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12493 || (a
->function
&& sym
!= sym
->result
)
12498 /* Assign the default initializer to a derived type variable or result. */
12501 apply_default_init (gfc_symbol
*sym
)
12503 gfc_expr
*init
= NULL
;
12505 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12508 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12509 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12511 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12514 build_init_assign (sym
, init
);
12515 sym
->attr
.referenced
= 1;
12519 /* Build an initializer for a local. Returns null if the symbol should not have
12520 a default initialization. */
12523 build_default_init_expr (gfc_symbol
*sym
)
12525 /* These symbols should never have a default initialization. */
12526 if (sym
->attr
.allocatable
12527 || sym
->attr
.external
12529 || sym
->attr
.pointer
12530 || sym
->attr
.in_equivalence
12531 || sym
->attr
.in_common
12534 || sym
->attr
.cray_pointee
12535 || sym
->attr
.cray_pointer
12539 /* Get the appropriate init expression. */
12540 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12543 /* Add an initialization expression to a local variable. */
12545 apply_default_init_local (gfc_symbol
*sym
)
12547 gfc_expr
*init
= NULL
;
12549 /* The symbol should be a variable or a function return value. */
12550 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12551 || (sym
->attr
.function
&& sym
->result
!= sym
))
12554 /* Try to build the initializer expression. If we can't initialize
12555 this symbol, then init will be NULL. */
12556 init
= build_default_init_expr (sym
);
12560 /* For saved variables, we don't want to add an initializer at function
12561 entry, so we just add a static initializer. Note that automatic variables
12562 are stack allocated even with -fno-automatic; we have also to exclude
12563 result variable, which are also nonstatic. */
12564 if (!sym
->attr
.automatic
12565 && (sym
->attr
.save
|| sym
->ns
->save_all
12566 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12567 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12568 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12570 /* Don't clobber an existing initializer! */
12571 gcc_assert (sym
->value
== NULL
);
12576 build_init_assign (sym
, init
);
12580 /* Resolution of common features of flavors variable and procedure. */
12583 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12585 gfc_array_spec
*as
;
12587 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12588 as
= CLASS_DATA (sym
)->as
;
12592 /* Constraints on deferred shape variable. */
12593 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12595 bool pointer
, allocatable
, dimension
;
12597 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12599 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12600 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12601 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12605 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12606 allocatable
= sym
->attr
.allocatable
;
12607 dimension
= sym
->attr
.dimension
;
12612 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12614 gfc_error ("Allocatable array %qs at %L must have a deferred "
12615 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12618 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12619 "%qs at %L may not be ALLOCATABLE",
12620 sym
->name
, &sym
->declared_at
))
12624 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12626 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12627 "assumed rank", sym
->name
, &sym
->declared_at
);
12633 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12634 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12636 gfc_error ("Array %qs at %L cannot have a deferred shape",
12637 sym
->name
, &sym
->declared_at
);
12642 /* Constraints on polymorphic variables. */
12643 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12646 if (sym
->attr
.class_ok
12647 && !sym
->attr
.select_type_temporary
12648 && !UNLIMITED_POLY (sym
)
12649 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12651 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12652 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12653 &sym
->declared_at
);
12658 /* Assume that use associated symbols were checked in the module ns.
12659 Class-variables that are associate-names are also something special
12660 and excepted from the test. */
12661 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12663 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12664 "or pointer", sym
->name
, &sym
->declared_at
);
12673 /* Additional checks for symbols with flavor variable and derived
12674 type. To be called from resolve_fl_variable. */
12677 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12679 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12681 /* Check to see if a derived type is blocked from being host
12682 associated by the presence of another class I symbol in the same
12683 namespace. 14.6.1.3 of the standard and the discussion on
12684 comp.lang.fortran. */
12685 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12686 && !sym
->ts
.u
.derived
->attr
.use_assoc
12687 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12690 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12691 if (s
&& s
->attr
.generic
)
12692 s
= gfc_find_dt_in_generic (s
);
12693 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12695 gfc_error ("The type %qs cannot be host associated at %L "
12696 "because it is blocked by an incompatible object "
12697 "of the same name declared at %L",
12698 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12704 /* 4th constraint in section 11.3: "If an object of a type for which
12705 component-initialization is specified (R429) appears in the
12706 specification-part of a module and does not have the ALLOCATABLE
12707 or POINTER attribute, the object shall have the SAVE attribute."
12709 The check for initializers is performed with
12710 gfc_has_default_initializer because gfc_default_initializer generates
12711 a hidden default for allocatable components. */
12712 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12713 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12714 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12715 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12716 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12717 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12718 "%qs at %L, needed due to the default "
12719 "initialization", sym
->name
, &sym
->declared_at
))
12722 /* Assign default initializer. */
12723 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12724 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12725 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12731 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12732 except in the declaration of an entity or component that has the POINTER
12733 or ALLOCATABLE attribute. */
12736 deferred_requirements (gfc_symbol
*sym
)
12738 if (sym
->ts
.deferred
12739 && !(sym
->attr
.pointer
12740 || sym
->attr
.allocatable
12741 || sym
->attr
.associate_var
12742 || sym
->attr
.omp_udr_artificial_var
))
12744 /* If a function has a result variable, only check the variable. */
12745 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12748 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12749 "requires either the POINTER or ALLOCATABLE attribute",
12750 sym
->name
, &sym
->declared_at
);
12757 /* Resolve symbols with flavor variable. */
12760 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12762 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12765 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12768 /* Set this flag to check that variables are parameters of all entries.
12769 This check is effected by the call to gfc_resolve_expr through
12770 is_non_constant_shape_array. */
12771 bool saved_specification_expr
= specification_expr
;
12772 specification_expr
= true;
12774 if (sym
->ns
->proc_name
12775 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12776 || sym
->ns
->proc_name
->attr
.is_main_program
)
12777 && !sym
->attr
.use_assoc
12778 && !sym
->attr
.allocatable
12779 && !sym
->attr
.pointer
12780 && is_non_constant_shape_array (sym
))
12782 /* F08:C541. The shape of an array defined in a main program or module
12783 * needs to be constant. */
12784 gfc_error ("The module or main program array %qs at %L must "
12785 "have constant shape", sym
->name
, &sym
->declared_at
);
12786 specification_expr
= saved_specification_expr
;
12790 /* Constraints on deferred type parameter. */
12791 if (!deferred_requirements (sym
))
12794 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12796 /* Make sure that character string variables with assumed length are
12797 dummy arguments. */
12798 gfc_expr
*e
= NULL
;
12801 e
= sym
->ts
.u
.cl
->length
;
12805 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12806 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12807 && !sym
->attr
.omp_udr_artificial_var
)
12809 gfc_error ("Entity with assumed character length at %L must be a "
12810 "dummy argument or a PARAMETER", &sym
->declared_at
);
12811 specification_expr
= saved_specification_expr
;
12815 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12817 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12818 specification_expr
= saved_specification_expr
;
12822 if (!gfc_is_constant_expr (e
)
12823 && !(e
->expr_type
== EXPR_VARIABLE
12824 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12826 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12827 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12828 || sym
->ns
->proc_name
->attr
.is_main_program
))
12830 gfc_error ("%qs at %L must have constant character length "
12831 "in this context", sym
->name
, &sym
->declared_at
);
12832 specification_expr
= saved_specification_expr
;
12835 if (sym
->attr
.in_common
)
12837 gfc_error ("COMMON variable %qs at %L must have constant "
12838 "character length", sym
->name
, &sym
->declared_at
);
12839 specification_expr
= saved_specification_expr
;
12845 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12846 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12848 /* Determine if the symbol may not have an initializer. */
12849 int no_init_flag
= 0, automatic_flag
= 0;
12850 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12851 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12853 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12854 && is_non_constant_shape_array (sym
))
12856 no_init_flag
= automatic_flag
= 1;
12858 /* Also, they must not have the SAVE attribute.
12859 SAVE_IMPLICIT is checked below. */
12860 if (sym
->as
&& sym
->attr
.codimension
)
12862 int corank
= sym
->as
->corank
;
12863 sym
->as
->corank
= 0;
12864 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12865 sym
->as
->corank
= corank
;
12867 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12869 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12870 specification_expr
= saved_specification_expr
;
12875 /* Ensure that any initializer is simplified. */
12877 gfc_simplify_expr (sym
->value
, 1);
12879 /* Reject illegal initializers. */
12880 if (!sym
->mark
&& sym
->value
)
12882 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12883 && CLASS_DATA (sym
)->attr
.allocatable
))
12884 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12885 sym
->name
, &sym
->declared_at
);
12886 else if (sym
->attr
.external
)
12887 gfc_error ("External %qs at %L cannot have an initializer",
12888 sym
->name
, &sym
->declared_at
);
12889 else if (sym
->attr
.dummy
12890 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12891 gfc_error ("Dummy %qs at %L cannot have an initializer",
12892 sym
->name
, &sym
->declared_at
);
12893 else if (sym
->attr
.intrinsic
)
12894 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12895 sym
->name
, &sym
->declared_at
);
12896 else if (sym
->attr
.result
)
12897 gfc_error ("Function result %qs at %L cannot have an initializer",
12898 sym
->name
, &sym
->declared_at
);
12899 else if (automatic_flag
)
12900 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12901 sym
->name
, &sym
->declared_at
);
12903 goto no_init_error
;
12904 specification_expr
= saved_specification_expr
;
12909 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12911 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12912 specification_expr
= saved_specification_expr
;
12916 specification_expr
= saved_specification_expr
;
12921 /* Compare the dummy characteristics of a module procedure interface
12922 declaration with the corresponding declaration in a submodule. */
12923 static gfc_formal_arglist
*new_formal
;
12924 static char errmsg
[200];
12927 compare_fsyms (gfc_symbol
*sym
)
12931 if (sym
== NULL
|| new_formal
== NULL
)
12934 fsym
= new_formal
->sym
;
12939 if (strcmp (sym
->name
, fsym
->name
) == 0)
12941 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12942 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12947 /* Resolve a procedure. */
12950 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12952 gfc_formal_arglist
*arg
;
12954 if (sym
->attr
.function
12955 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12958 /* Constraints on deferred type parameter. */
12959 if (!deferred_requirements (sym
))
12962 if (sym
->ts
.type
== BT_CHARACTER
)
12964 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12966 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12967 && !resolve_charlen (cl
))
12970 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12971 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12973 gfc_error ("Character-valued statement function %qs at %L must "
12974 "have constant length", sym
->name
, &sym
->declared_at
);
12979 /* Ensure that derived type for are not of a private type. Internal
12980 module procedures are excluded by 2.2.3.3 - i.e., they are not
12981 externally accessible and can access all the objects accessible in
12983 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12984 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12985 && gfc_check_symbol_access (sym
))
12987 gfc_interface
*iface
;
12989 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12992 && arg
->sym
->ts
.type
== BT_DERIVED
12993 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12994 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12995 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12996 "and cannot be a dummy argument"
12997 " of %qs, which is PUBLIC at %L",
12998 arg
->sym
->name
, sym
->name
,
12999 &sym
->declared_at
))
13001 /* Stop this message from recurring. */
13002 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13007 /* PUBLIC interfaces may expose PRIVATE procedures that take types
13008 PRIVATE to the containing module. */
13009 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
13011 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
13014 && arg
->sym
->ts
.type
== BT_DERIVED
13015 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
13016 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
13017 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
13018 "PUBLIC interface %qs at %L "
13019 "takes dummy arguments of %qs which "
13020 "is PRIVATE", iface
->sym
->name
,
13021 sym
->name
, &iface
->sym
->declared_at
,
13022 gfc_typename(&arg
->sym
->ts
)))
13024 /* Stop this message from recurring. */
13025 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
13032 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
13033 && !sym
->attr
.proc_pointer
)
13035 gfc_error ("Function %qs at %L cannot have an initializer",
13036 sym
->name
, &sym
->declared_at
);
13038 /* Make sure no second error is issued for this. */
13039 sym
->value
->error
= 1;
13043 /* An external symbol may not have an initializer because it is taken to be
13044 a procedure. Exception: Procedure Pointers. */
13045 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
13047 gfc_error ("External object %qs at %L may not have an initializer",
13048 sym
->name
, &sym
->declared_at
);
13052 /* An elemental function is required to return a scalar 12.7.1 */
13053 if (sym
->attr
.elemental
&& sym
->attr
.function
13054 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
13056 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
13057 "result", sym
->name
, &sym
->declared_at
);
13058 /* Reset so that the error only occurs once. */
13059 sym
->attr
.elemental
= 0;
13063 if (sym
->attr
.proc
== PROC_ST_FUNCTION
13064 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
13066 gfc_error ("Statement function %qs at %L may not have pointer or "
13067 "allocatable attribute", sym
->name
, &sym
->declared_at
);
13071 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
13072 char-len-param shall not be array-valued, pointer-valued, recursive
13073 or pure. ....snip... A character value of * may only be used in the
13074 following ways: (i) Dummy arg of procedure - dummy associates with
13075 actual length; (ii) To declare a named constant; or (iii) External
13076 function - but length must be declared in calling scoping unit. */
13077 if (sym
->attr
.function
13078 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
13079 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
13081 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
13082 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
13084 if (sym
->as
&& sym
->as
->rank
)
13085 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13086 "array-valued", sym
->name
, &sym
->declared_at
);
13088 if (sym
->attr
.pointer
)
13089 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13090 "pointer-valued", sym
->name
, &sym
->declared_at
);
13092 if (sym
->attr
.pure
)
13093 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13094 "pure", sym
->name
, &sym
->declared_at
);
13096 if (sym
->attr
.recursive
)
13097 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
13098 "recursive", sym
->name
, &sym
->declared_at
);
13103 /* Appendix B.2 of the standard. Contained functions give an
13104 error anyway. Deferred character length is an F2003 feature.
13105 Don't warn on intrinsic conversion functions, which start
13106 with two underscores. */
13107 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
13108 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
13109 gfc_notify_std (GFC_STD_F95_OBS
,
13110 "CHARACTER(*) function %qs at %L",
13111 sym
->name
, &sym
->declared_at
);
13114 /* F2008, C1218. */
13115 if (sym
->attr
.elemental
)
13117 if (sym
->attr
.proc_pointer
)
13119 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
13120 sym
->name
, &sym
->declared_at
);
13123 if (sym
->attr
.dummy
)
13125 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
13126 sym
->name
, &sym
->declared_at
);
13131 /* F2018, C15100: "The result of an elemental function shall be scalar,
13132 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
13133 pointer is tested and caught elsewhere. */
13134 if (sym
->attr
.elemental
&& sym
->result
13135 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
13137 gfc_error ("Function result variable %qs at %L of elemental "
13138 "function %qs shall not have an ALLOCATABLE or POINTER "
13139 "attribute", sym
->result
->name
,
13140 &sym
->result
->declared_at
, sym
->name
);
13144 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13146 gfc_formal_arglist
*curr_arg
;
13147 int has_non_interop_arg
= 0;
13149 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13150 sym
->common_block
))
13152 /* Clear these to prevent looking at them again if there was an
13154 sym
->attr
.is_bind_c
= 0;
13155 sym
->attr
.is_c_interop
= 0;
13156 sym
->ts
.is_c_interop
= 0;
13160 /* So far, no errors have been found. */
13161 sym
->attr
.is_c_interop
= 1;
13162 sym
->ts
.is_c_interop
= 1;
13165 curr_arg
= gfc_sym_get_dummy_args (sym
);
13166 while (curr_arg
!= NULL
)
13168 /* Skip implicitly typed dummy args here. */
13169 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13170 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13171 /* If something is found to fail, record the fact so we
13172 can mark the symbol for the procedure as not being
13173 BIND(C) to try and prevent multiple errors being
13175 has_non_interop_arg
= 1;
13177 curr_arg
= curr_arg
->next
;
13180 /* See if any of the arguments were not interoperable and if so, clear
13181 the procedure symbol to prevent duplicate error messages. */
13182 if (has_non_interop_arg
!= 0)
13184 sym
->attr
.is_c_interop
= 0;
13185 sym
->ts
.is_c_interop
= 0;
13186 sym
->attr
.is_bind_c
= 0;
13190 if (!sym
->attr
.proc_pointer
)
13192 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13194 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13195 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13198 if (sym
->attr
.intent
)
13200 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13201 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13204 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13206 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13207 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13210 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13211 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13212 || sym
->attr
.contained
))
13214 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13215 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13218 if (strcmp ("ppr@", sym
->name
) == 0)
13220 gfc_error ("Procedure pointer result %qs at %L "
13221 "is missing the pointer attribute",
13222 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13227 /* Assume that a procedure whose body is not known has references
13228 to external arrays. */
13229 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13230 sym
->attr
.array_outer_dependency
= 1;
13232 /* Compare the characteristics of a module procedure with the
13233 interface declaration. Ideally this would be done with
13234 gfc_compare_interfaces but, at present, the formal interface
13235 cannot be copied to the ts.interface. */
13236 if (sym
->attr
.module_procedure
13237 && sym
->attr
.if_source
== IFSRC_DECL
)
13240 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13242 char *submodule_name
;
13243 strcpy (name
, sym
->ns
->proc_name
->name
);
13244 module_name
= strtok (name
, ".");
13245 submodule_name
= strtok (NULL
, ".");
13247 iface
= sym
->tlink
;
13250 /* Make sure that the result uses the correct charlen for deferred
13252 if (iface
&& sym
->result
13253 && iface
->ts
.type
== BT_CHARACTER
13254 && iface
->ts
.deferred
)
13255 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13260 /* Check the procedure characteristics. */
13261 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13263 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13264 "PROCEDURE at %L and its interface in %s",
13265 &sym
->declared_at
, module_name
);
13269 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13271 gfc_error ("Mismatch in PURE attribute between MODULE "
13272 "PROCEDURE at %L and its interface in %s",
13273 &sym
->declared_at
, module_name
);
13277 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13279 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13280 "PROCEDURE at %L and its interface in %s",
13281 &sym
->declared_at
, module_name
);
13285 /* Check the result characteristics. */
13286 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13288 gfc_error ("%s between the MODULE PROCEDURE declaration "
13289 "in MODULE %qs and the declaration at %L in "
13291 errmsg
, module_name
, &sym
->declared_at
,
13292 submodule_name
? submodule_name
: module_name
);
13297 /* Check the characteristics of the formal arguments. */
13298 if (sym
->formal
&& sym
->formal_ns
)
13300 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13303 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13311 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13312 been defined and we now know their defined arguments, check that they fulfill
13313 the requirements of the standard for procedures used as finalizers. */
13316 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13318 gfc_finalizer
* list
;
13319 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13320 bool result
= true;
13321 bool seen_scalar
= false;
13324 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13327 gfc_resolve_finalizers (parent
, finalizable
);
13329 /* Ensure that derived-type components have a their finalizers resolved. */
13330 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13331 for (c
= derived
->components
; c
; c
= c
->next
)
13332 if (c
->ts
.type
== BT_DERIVED
13333 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13335 bool has_final2
= false;
13336 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13337 return false; /* Error. */
13338 has_final
= has_final
|| has_final2
;
13340 /* Return early if not finalizable. */
13344 *finalizable
= false;
13348 /* Walk over the list of finalizer-procedures, check them, and if any one
13349 does not fit in with the standard's definition, print an error and remove
13350 it from the list. */
13351 prev_link
= &derived
->f2k_derived
->finalizers
;
13352 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13354 gfc_formal_arglist
*dummy_args
;
13359 /* Skip this finalizer if we already resolved it. */
13360 if (list
->proc_tree
)
13362 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13363 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13364 seen_scalar
= true;
13365 prev_link
= &(list
->next
);
13369 /* Check this exists and is a SUBROUTINE. */
13370 if (!list
->proc_sym
->attr
.subroutine
)
13372 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13373 list
->proc_sym
->name
, &list
->where
);
13377 /* We should have exactly one argument. */
13378 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13379 if (!dummy_args
|| dummy_args
->next
)
13381 gfc_error ("FINAL procedure at %L must have exactly one argument",
13385 arg
= dummy_args
->sym
;
13387 /* This argument must be of our type. */
13388 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13390 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13391 &arg
->declared_at
, derived
->name
);
13395 /* It must neither be a pointer nor allocatable nor optional. */
13396 if (arg
->attr
.pointer
)
13398 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13399 &arg
->declared_at
);
13402 if (arg
->attr
.allocatable
)
13404 gfc_error ("Argument of FINAL procedure at %L must not be"
13405 " ALLOCATABLE", &arg
->declared_at
);
13408 if (arg
->attr
.optional
)
13410 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13411 &arg
->declared_at
);
13415 /* It must not be INTENT(OUT). */
13416 if (arg
->attr
.intent
== INTENT_OUT
)
13418 gfc_error ("Argument of FINAL procedure at %L must not be"
13419 " INTENT(OUT)", &arg
->declared_at
);
13423 /* Warn if the procedure is non-scalar and not assumed shape. */
13424 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13425 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13426 gfc_warning (OPT_Wsurprising
,
13427 "Non-scalar FINAL procedure at %L should have assumed"
13428 " shape argument", &arg
->declared_at
);
13430 /* Check that it does not match in kind and rank with a FINAL procedure
13431 defined earlier. To really loop over the *earlier* declarations,
13432 we need to walk the tail of the list as new ones were pushed at the
13434 /* TODO: Handle kind parameters once they are implemented. */
13435 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13436 for (i
= list
->next
; i
; i
= i
->next
)
13438 gfc_formal_arglist
*dummy_args
;
13440 /* Argument list might be empty; that is an error signalled earlier,
13441 but we nevertheless continued resolving. */
13442 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13445 gfc_symbol
* i_arg
= dummy_args
->sym
;
13446 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13447 if (i_rank
== my_rank
)
13449 gfc_error ("FINAL procedure %qs declared at %L has the same"
13450 " rank (%d) as %qs",
13451 list
->proc_sym
->name
, &list
->where
, my_rank
,
13452 i
->proc_sym
->name
);
13458 /* Is this the/a scalar finalizer procedure? */
13460 seen_scalar
= true;
13462 /* Find the symtree for this procedure. */
13463 gcc_assert (!list
->proc_tree
);
13464 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13466 prev_link
= &list
->next
;
13469 /* Remove wrong nodes immediately from the list so we don't risk any
13470 troubles in the future when they might fail later expectations. */
13473 *prev_link
= list
->next
;
13474 gfc_free_finalizer (i
);
13478 if (result
== false)
13481 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13482 were nodes in the list, must have been for arrays. It is surely a good
13483 idea to have a scalar version there if there's something to finalize. */
13484 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13485 gfc_warning (OPT_Wsurprising
,
13486 "Only array FINAL procedures declared for derived type %qs"
13487 " defined at %L, suggest also scalar one",
13488 derived
->name
, &derived
->declared_at
);
13490 vtab
= gfc_find_derived_vtab (derived
);
13491 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13492 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13495 *finalizable
= true;
13501 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13504 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13505 const char* generic_name
, locus where
)
13507 gfc_symbol
*sym1
, *sym2
;
13508 const char *pass1
, *pass2
;
13509 gfc_formal_arglist
*dummy_args
;
13511 gcc_assert (t1
->specific
&& t2
->specific
);
13512 gcc_assert (!t1
->specific
->is_generic
);
13513 gcc_assert (!t2
->specific
->is_generic
);
13514 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13516 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13517 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13522 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13523 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13524 || sym1
->attr
.function
!= sym2
->attr
.function
)
13526 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13527 " GENERIC %qs at %L",
13528 sym1
->name
, sym2
->name
, generic_name
, &where
);
13532 /* Determine PASS arguments. */
13533 if (t1
->specific
->nopass
)
13535 else if (t1
->specific
->pass_arg
)
13536 pass1
= t1
->specific
->pass_arg
;
13539 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13541 pass1
= dummy_args
->sym
->name
;
13545 if (t2
->specific
->nopass
)
13547 else if (t2
->specific
->pass_arg
)
13548 pass2
= t2
->specific
->pass_arg
;
13551 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13553 pass2
= dummy_args
->sym
->name
;
13558 /* Compare the interfaces. */
13559 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13560 NULL
, 0, pass1
, pass2
))
13562 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13563 sym1
->name
, sym2
->name
, generic_name
, &where
);
13571 /* Worker function for resolving a generic procedure binding; this is used to
13572 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13574 The difference between those cases is finding possible inherited bindings
13575 that are overridden, as one has to look for them in tb_sym_root,
13576 tb_uop_root or tb_op, respectively. Thus the caller must already find
13577 the super-type and set p->overridden correctly. */
13580 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13581 gfc_typebound_proc
* p
, const char* name
)
13583 gfc_tbp_generic
* target
;
13584 gfc_symtree
* first_target
;
13585 gfc_symtree
* inherited
;
13587 gcc_assert (p
&& p
->is_generic
);
13589 /* Try to find the specific bindings for the symtrees in our target-list. */
13590 gcc_assert (p
->u
.generic
);
13591 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13592 if (!target
->specific
)
13594 gfc_typebound_proc
* overridden_tbp
;
13595 gfc_tbp_generic
* g
;
13596 const char* target_name
;
13598 target_name
= target
->specific_st
->name
;
13600 /* Defined for this type directly. */
13601 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13603 target
->specific
= target
->specific_st
->n
.tb
;
13604 goto specific_found
;
13607 /* Look for an inherited specific binding. */
13610 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13615 gcc_assert (inherited
->n
.tb
);
13616 target
->specific
= inherited
->n
.tb
;
13617 goto specific_found
;
13621 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13622 " at %L", target_name
, name
, &p
->where
);
13625 /* Once we've found the specific binding, check it is not ambiguous with
13626 other specifics already found or inherited for the same GENERIC. */
13628 gcc_assert (target
->specific
);
13630 /* This must really be a specific binding! */
13631 if (target
->specific
->is_generic
)
13633 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13634 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13638 /* Check those already resolved on this type directly. */
13639 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13640 if (g
!= target
&& g
->specific
13641 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13644 /* Check for ambiguity with inherited specific targets. */
13645 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13646 overridden_tbp
= overridden_tbp
->overridden
)
13647 if (overridden_tbp
->is_generic
)
13649 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13651 gcc_assert (g
->specific
);
13652 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13658 /* If we attempt to "overwrite" a specific binding, this is an error. */
13659 if (p
->overridden
&& !p
->overridden
->is_generic
)
13661 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13662 " the same name", name
, &p
->where
);
13666 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13667 all must have the same attributes here. */
13668 first_target
= p
->u
.generic
->specific
->u
.specific
;
13669 gcc_assert (first_target
);
13670 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13671 p
->function
= first_target
->n
.sym
->attr
.function
;
13677 /* Resolve a GENERIC procedure binding for a derived type. */
13680 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13682 gfc_symbol
* super_type
;
13684 /* Find the overridden binding if any. */
13685 st
->n
.tb
->overridden
= NULL
;
13686 super_type
= gfc_get_derived_super_type (derived
);
13689 gfc_symtree
* overridden
;
13690 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13693 if (overridden
&& overridden
->n
.tb
)
13694 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13697 /* Resolve using worker function. */
13698 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13702 /* Retrieve the target-procedure of an operator binding and do some checks in
13703 common for intrinsic and user-defined type-bound operators. */
13706 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13708 gfc_symbol
* target_proc
;
13710 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13711 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13712 gcc_assert (target_proc
);
13714 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13715 if (target
->specific
->nopass
)
13717 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13721 return target_proc
;
13725 /* Resolve a type-bound intrinsic operator. */
13728 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13729 gfc_typebound_proc
* p
)
13731 gfc_symbol
* super_type
;
13732 gfc_tbp_generic
* target
;
13734 /* If there's already an error here, do nothing (but don't fail again). */
13738 /* Operators should always be GENERIC bindings. */
13739 gcc_assert (p
->is_generic
);
13741 /* Look for an overridden binding. */
13742 super_type
= gfc_get_derived_super_type (derived
);
13743 if (super_type
&& super_type
->f2k_derived
)
13744 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13747 p
->overridden
= NULL
;
13749 /* Resolve general GENERIC properties using worker function. */
13750 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13753 /* Check the targets to be procedures of correct interface. */
13754 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13756 gfc_symbol
* target_proc
;
13758 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13762 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13765 /* Add target to non-typebound operator list. */
13766 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13767 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13769 gfc_interface
*head
, *intr
;
13771 /* Preempt 'gfc_check_new_interface' for submodules, where the
13772 mechanism for handling module procedures winds up resolving
13773 operator interfaces twice and would otherwise cause an error. */
13774 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13775 if (intr
->sym
== target_proc
13776 && target_proc
->attr
.used_in_submodule
)
13779 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13780 target_proc
, p
->where
))
13782 head
= derived
->ns
->op
[op
];
13783 intr
= gfc_get_interface ();
13784 intr
->sym
= target_proc
;
13785 intr
->where
= p
->where
;
13787 derived
->ns
->op
[op
] = intr
;
13799 /* Resolve a type-bound user operator (tree-walker callback). */
13801 static gfc_symbol
* resolve_bindings_derived
;
13802 static bool resolve_bindings_result
;
13804 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13807 resolve_typebound_user_op (gfc_symtree
* stree
)
13809 gfc_symbol
* super_type
;
13810 gfc_tbp_generic
* target
;
13812 gcc_assert (stree
&& stree
->n
.tb
);
13814 if (stree
->n
.tb
->error
)
13817 /* Operators should always be GENERIC bindings. */
13818 gcc_assert (stree
->n
.tb
->is_generic
);
13820 /* Find overridden procedure, if any. */
13821 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13822 if (super_type
&& super_type
->f2k_derived
)
13824 gfc_symtree
* overridden
;
13825 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13826 stree
->name
, true, NULL
);
13828 if (overridden
&& overridden
->n
.tb
)
13829 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13832 stree
->n
.tb
->overridden
= NULL
;
13834 /* Resolve basically using worker function. */
13835 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13838 /* Check the targets to be functions of correct interface. */
13839 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13841 gfc_symbol
* target_proc
;
13843 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13847 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13854 resolve_bindings_result
= false;
13855 stree
->n
.tb
->error
= 1;
13859 /* Resolve the type-bound procedures for a derived type. */
13862 resolve_typebound_procedure (gfc_symtree
* stree
)
13866 gfc_symbol
* me_arg
;
13867 gfc_symbol
* super_type
;
13868 gfc_component
* comp
;
13870 gcc_assert (stree
);
13872 /* Undefined specific symbol from GENERIC target definition. */
13876 if (stree
->n
.tb
->error
)
13879 /* If this is a GENERIC binding, use that routine. */
13880 if (stree
->n
.tb
->is_generic
)
13882 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13887 /* Get the target-procedure to check it. */
13888 gcc_assert (!stree
->n
.tb
->is_generic
);
13889 gcc_assert (stree
->n
.tb
->u
.specific
);
13890 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13891 where
= stree
->n
.tb
->where
;
13893 /* Default access should already be resolved from the parser. */
13894 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13896 if (stree
->n
.tb
->deferred
)
13898 if (!check_proc_interface (proc
, &where
))
13903 /* If proc has not been resolved at this point, proc->name may
13904 actually be a USE associated entity. See PR fortran/89647. */
13905 if (!proc
->resolved
13906 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13909 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13910 if (tmp
&& tmp
->attr
.use_assoc
)
13912 proc
->module
= tmp
->module
;
13913 proc
->attr
.proc
= tmp
->attr
.proc
;
13914 proc
->attr
.function
= tmp
->attr
.function
;
13915 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13916 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13917 proc
->ts
= tmp
->ts
;
13918 proc
->result
= tmp
->result
;
13922 /* Check for F08:C465. */
13923 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13924 || (proc
->attr
.proc
!= PROC_MODULE
13925 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13926 || proc
->attr
.abstract
)
13928 gfc_error ("%qs must be a module procedure or an external "
13929 "procedure with an explicit interface at %L",
13930 proc
->name
, &where
);
13935 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13936 stree
->n
.tb
->function
= proc
->attr
.function
;
13938 /* Find the super-type of the current derived type. We could do this once and
13939 store in a global if speed is needed, but as long as not I believe this is
13940 more readable and clearer. */
13941 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13943 /* If PASS, resolve and check arguments if not already resolved / loaded
13944 from a .mod file. */
13945 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13947 gfc_formal_arglist
*dummy_args
;
13949 dummy_args
= gfc_sym_get_dummy_args (proc
);
13950 if (stree
->n
.tb
->pass_arg
)
13952 gfc_formal_arglist
*i
;
13954 /* If an explicit passing argument name is given, walk the arg-list
13955 and look for it. */
13958 stree
->n
.tb
->pass_arg_num
= 1;
13959 for (i
= dummy_args
; i
; i
= i
->next
)
13961 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13966 ++stree
->n
.tb
->pass_arg_num
;
13971 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13973 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13974 stree
->n
.tb
->pass_arg
);
13980 /* Otherwise, take the first one; there should in fact be at least
13982 stree
->n
.tb
->pass_arg_num
= 1;
13985 gfc_error ("Procedure %qs with PASS at %L must have at"
13986 " least one argument", proc
->name
, &where
);
13989 me_arg
= dummy_args
->sym
;
13992 /* Now check that the argument-type matches and the passed-object
13993 dummy argument is generally fine. */
13995 gcc_assert (me_arg
);
13997 if (me_arg
->ts
.type
!= BT_CLASS
)
13999 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14000 " at %L", proc
->name
, &where
);
14004 if (CLASS_DATA (me_arg
)->ts
.u
.derived
14005 != resolve_bindings_derived
)
14007 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14008 " the derived-type %qs", me_arg
->name
, proc
->name
,
14009 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
14013 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
14014 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
14016 gfc_error ("Passed-object dummy argument of %qs at %L must be"
14017 " scalar", proc
->name
, &where
);
14020 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14022 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14023 " be ALLOCATABLE", proc
->name
, &where
);
14026 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14028 gfc_error ("Passed-object dummy argument of %qs at %L must not"
14029 " be POINTER", proc
->name
, &where
);
14034 /* If we are extending some type, check that we don't override a procedure
14035 flagged NON_OVERRIDABLE. */
14036 stree
->n
.tb
->overridden
= NULL
;
14039 gfc_symtree
* overridden
;
14040 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
14041 stree
->name
, true, NULL
);
14045 if (overridden
->n
.tb
)
14046 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
14048 if (!gfc_check_typebound_override (stree
, overridden
))
14053 /* See if there's a name collision with a component directly in this type. */
14054 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
14055 if (!strcmp (comp
->name
, stree
->name
))
14057 gfc_error ("Procedure %qs at %L has the same name as a component of"
14059 stree
->name
, &where
, resolve_bindings_derived
->name
);
14063 /* Try to find a name collision with an inherited component. */
14064 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
14067 gfc_error ("Procedure %qs at %L has the same name as an inherited"
14068 " component of %qs",
14069 stree
->name
, &where
, resolve_bindings_derived
->name
);
14073 stree
->n
.tb
->error
= 0;
14077 resolve_bindings_result
= false;
14078 stree
->n
.tb
->error
= 1;
14083 resolve_typebound_procedures (gfc_symbol
* derived
)
14086 gfc_symbol
* super_type
;
14088 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
14091 super_type
= gfc_get_derived_super_type (derived
);
14093 resolve_symbol (super_type
);
14095 resolve_bindings_derived
= derived
;
14096 resolve_bindings_result
= true;
14098 if (derived
->f2k_derived
->tb_sym_root
)
14099 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
14100 &resolve_typebound_procedure
);
14102 if (derived
->f2k_derived
->tb_uop_root
)
14103 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
14104 &resolve_typebound_user_op
);
14106 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
14108 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
14109 if (p
&& !resolve_typebound_intrinsic_op (derived
,
14110 (gfc_intrinsic_op
)op
, p
))
14111 resolve_bindings_result
= false;
14114 return resolve_bindings_result
;
14118 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
14119 to give all identical derived types the same backend_decl. */
14121 add_dt_to_dt_list (gfc_symbol
*derived
)
14123 if (!derived
->dt_next
)
14125 if (gfc_derived_types
)
14127 derived
->dt_next
= gfc_derived_types
->dt_next
;
14128 gfc_derived_types
->dt_next
= derived
;
14132 derived
->dt_next
= derived
;
14134 gfc_derived_types
= derived
;
14139 /* Ensure that a derived-type is really not abstract, meaning that every
14140 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14143 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14148 if (!ensure_not_abstract_walker (sub
, st
->left
))
14150 if (!ensure_not_abstract_walker (sub
, st
->right
))
14153 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14155 gfc_symtree
* overriding
;
14156 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14159 gcc_assert (overriding
->n
.tb
);
14160 if (overriding
->n
.tb
->deferred
)
14162 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14163 " %qs is DEFERRED and not overridden",
14164 sub
->name
, &sub
->declared_at
, st
->name
);
14173 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14175 /* The algorithm used here is to recursively travel up the ancestry of sub
14176 and for each ancestor-type, check all bindings. If any of them is
14177 DEFERRED, look it up starting from sub and see if the found (overriding)
14178 binding is not DEFERRED.
14179 This is not the most efficient way to do this, but it should be ok and is
14180 clearer than something sophisticated. */
14182 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14184 if (!ancestor
->attr
.abstract
)
14187 /* Walk bindings of this ancestor. */
14188 if (ancestor
->f2k_derived
)
14191 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14196 /* Find next ancestor type and recurse on it. */
14197 ancestor
= gfc_get_derived_super_type (ancestor
);
14199 return ensure_not_abstract (sub
, ancestor
);
14205 /* This check for typebound defined assignments is done recursively
14206 since the order in which derived types are resolved is not always in
14207 order of the declarations. */
14210 check_defined_assignments (gfc_symbol
*derived
)
14214 for (c
= derived
->components
; c
; c
= c
->next
)
14216 if (!gfc_bt_struct (c
->ts
.type
)
14218 || c
->attr
.allocatable
14219 || c
->attr
.proc_pointer_comp
14220 || c
->attr
.class_pointer
14221 || c
->attr
.proc_pointer
)
14224 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14225 || (c
->ts
.u
.derived
->f2k_derived
14226 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14228 derived
->attr
.defined_assign_comp
= 1;
14232 check_defined_assignments (c
->ts
.u
.derived
);
14233 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14235 derived
->attr
.defined_assign_comp
= 1;
14242 /* Resolve a single component of a derived type or structure. */
14245 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14247 gfc_symbol
*super_type
;
14248 symbol_attribute
*attr
;
14250 if (c
->attr
.artificial
)
14253 /* Do not allow vtype components to be resolved in nameless namespaces
14254 such as block data because the procedure pointers will cause ICEs
14255 and vtables are not needed in these contexts. */
14256 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14257 && sym
->ns
->proc_name
== NULL
)
14261 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14262 && c
->attr
.codimension
14263 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14265 gfc_error ("Coarray component %qs at %L must be allocatable with "
14266 "deferred shape", c
->name
, &c
->loc
);
14271 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14272 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14274 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14275 "shall not be a coarray", c
->name
, &c
->loc
);
14280 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14281 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14282 || c
->attr
.allocatable
))
14284 gfc_error ("Component %qs at %L with coarray component "
14285 "shall be a nonpointer, nonallocatable scalar",
14291 if (c
->ts
.type
== BT_CLASS
)
14293 if (CLASS_DATA (c
))
14295 attr
= &(CLASS_DATA (c
)->attr
);
14297 /* Fix up contiguous attribute. */
14298 if (c
->attr
.contiguous
)
14299 attr
->contiguous
= 1;
14307 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14309 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14310 "is not an array pointer", c
->name
, &c
->loc
);
14314 /* F2003, 15.2.1 - length has to be one. */
14315 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14316 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14317 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14318 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14320 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14325 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14327 gfc_symbol
*ifc
= c
->ts
.interface
;
14329 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14335 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14337 /* Resolve interface and copy attributes. */
14338 if (ifc
->formal
&& !ifc
->formal_ns
)
14339 resolve_symbol (ifc
);
14340 if (ifc
->attr
.intrinsic
)
14341 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14345 c
->ts
= ifc
->result
->ts
;
14346 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14347 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14348 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14349 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14350 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14355 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14356 c
->attr
.pointer
= ifc
->attr
.pointer
;
14357 c
->attr
.dimension
= ifc
->attr
.dimension
;
14358 c
->as
= gfc_copy_array_spec (ifc
->as
);
14359 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14361 c
->ts
.interface
= ifc
;
14362 c
->attr
.function
= ifc
->attr
.function
;
14363 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14365 c
->attr
.pure
= ifc
->attr
.pure
;
14366 c
->attr
.elemental
= ifc
->attr
.elemental
;
14367 c
->attr
.recursive
= ifc
->attr
.recursive
;
14368 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14369 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14370 /* Copy char length. */
14371 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14373 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14374 if (cl
->length
&& !cl
->resolved
14375 && !gfc_resolve_expr (cl
->length
))
14384 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14386 /* Since PPCs are not implicitly typed, a PPC without an explicit
14387 interface must be a subroutine. */
14388 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14391 /* Procedure pointer components: Check PASS arg. */
14392 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14393 && !sym
->attr
.vtype
)
14395 gfc_symbol
* me_arg
;
14397 if (c
->tb
->pass_arg
)
14399 gfc_formal_arglist
* i
;
14401 /* If an explicit passing argument name is given, walk the arg-list
14402 and look for it. */
14405 c
->tb
->pass_arg_num
= 1;
14406 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14408 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14413 c
->tb
->pass_arg_num
++;
14418 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14419 "at %L has no argument %qs", c
->name
,
14420 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14427 /* Otherwise, take the first one; there should in fact be at least
14429 c
->tb
->pass_arg_num
= 1;
14430 if (!c
->ts
.interface
->formal
)
14432 gfc_error ("Procedure pointer component %qs with PASS at %L "
14433 "must have at least one argument",
14438 me_arg
= c
->ts
.interface
->formal
->sym
;
14441 /* Now check that the argument-type matches. */
14442 gcc_assert (me_arg
);
14443 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14444 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14445 || (me_arg
->ts
.type
== BT_CLASS
14446 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14448 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14449 " the derived type %qs", me_arg
->name
, c
->name
,
14450 me_arg
->name
, &c
->loc
, sym
->name
);
14455 /* Check for F03:C453. */
14456 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14458 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14459 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14465 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14467 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14468 "may not have the POINTER attribute", me_arg
->name
,
14469 c
->name
, me_arg
->name
, &c
->loc
);
14474 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14476 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14477 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14478 me_arg
->name
, &c
->loc
);
14483 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14485 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14486 " at %L", c
->name
, &c
->loc
);
14492 /* Check type-spec if this is not the parent-type component. */
14493 if (((sym
->attr
.is_class
14494 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14495 || c
!= sym
->components
->ts
.u
.derived
->components
))
14496 || (!sym
->attr
.is_class
14497 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14498 && !sym
->attr
.vtype
14499 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14502 super_type
= gfc_get_derived_super_type (sym
);
14504 /* If this type is an extension, set the accessibility of the parent
14507 && ((sym
->attr
.is_class
14508 && c
== sym
->components
->ts
.u
.derived
->components
)
14509 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14510 && strcmp (super_type
->name
, c
->name
) == 0)
14511 c
->attr
.access
= super_type
->attr
.access
;
14513 /* If this type is an extension, see if this component has the same name
14514 as an inherited type-bound procedure. */
14515 if (super_type
&& !sym
->attr
.is_class
14516 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14518 gfc_error ("Component %qs of %qs at %L has the same name as an"
14519 " inherited type-bound procedure",
14520 c
->name
, sym
->name
, &c
->loc
);
14524 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14525 && !c
->ts
.deferred
)
14527 if (c
->ts
.u
.cl
->length
== NULL
14528 || (!resolve_charlen(c
->ts
.u
.cl
))
14529 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14531 gfc_error ("Character length of component %qs needs to "
14532 "be a constant specification expression at %L",
14534 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14539 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14540 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14542 gfc_error ("Character component %qs of %qs at %L with deferred "
14543 "length must be a POINTER or ALLOCATABLE",
14544 c
->name
, sym
->name
, &c
->loc
);
14548 /* Add the hidden deferred length field. */
14549 if (c
->ts
.type
== BT_CHARACTER
14550 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14551 && !c
->attr
.function
14552 && !sym
->attr
.is_class
)
14554 char name
[GFC_MAX_SYMBOL_LEN
+9];
14555 gfc_component
*strlen
;
14556 sprintf (name
, "_%s_length", c
->name
);
14557 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14558 if (strlen
== NULL
)
14560 if (!gfc_add_component (sym
, name
, &strlen
))
14562 strlen
->ts
.type
= BT_INTEGER
;
14563 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14564 strlen
->attr
.access
= ACCESS_PRIVATE
;
14565 strlen
->attr
.artificial
= 1;
14569 if (c
->ts
.type
== BT_DERIVED
14570 && sym
->component_access
!= ACCESS_PRIVATE
14571 && gfc_check_symbol_access (sym
)
14572 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14573 && !c
->ts
.u
.derived
->attr
.use_assoc
14574 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14575 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14576 "PRIVATE type and cannot be a component of "
14577 "%qs, which is PUBLIC at %L", c
->name
,
14578 sym
->name
, &sym
->declared_at
))
14581 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14583 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14584 "type %s", c
->name
, &c
->loc
, sym
->name
);
14588 if (sym
->attr
.sequence
)
14590 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14592 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14593 "not have the SEQUENCE attribute",
14594 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14599 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14600 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14601 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14602 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14603 CLASS_DATA (c
)->ts
.u
.derived
14604 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14606 /* If an allocatable component derived type is of the same type as
14607 the enclosing derived type, we need a vtable generating so that
14608 the __deallocate procedure is created. */
14609 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14610 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14611 gfc_find_vtab (&c
->ts
);
14613 /* Ensure that all the derived type components are put on the
14614 derived type list; even in formal namespaces, where derived type
14615 pointer components might not have been declared. */
14616 if (c
->ts
.type
== BT_DERIVED
14618 && c
->ts
.u
.derived
->components
14620 && sym
!= c
->ts
.u
.derived
)
14621 add_dt_to_dt_list (c
->ts
.u
.derived
);
14623 if (!gfc_resolve_array_spec (c
->as
,
14624 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14625 || c
->attr
.allocatable
)))
14628 if (c
->initializer
&& !sym
->attr
.vtype
14629 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14630 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14637 /* Be nice about the locus for a structure expression - show the locus of the
14638 first non-null sub-expression if we can. */
14641 cons_where (gfc_expr
*struct_expr
)
14643 gfc_constructor
*cons
;
14645 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14647 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14648 for (; cons
; cons
= gfc_constructor_next (cons
))
14650 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14651 return &cons
->expr
->where
;
14654 return &struct_expr
->where
;
14657 /* Resolve the components of a structure type. Much less work than derived
14661 resolve_fl_struct (gfc_symbol
*sym
)
14664 gfc_expr
*init
= NULL
;
14667 /* Make sure UNIONs do not have overlapping initializers. */
14668 if (sym
->attr
.flavor
== FL_UNION
)
14670 for (c
= sym
->components
; c
; c
= c
->next
)
14672 if (init
&& c
->initializer
)
14674 gfc_error ("Conflicting initializers in union at %L and %L",
14675 cons_where (init
), cons_where (c
->initializer
));
14676 gfc_free_expr (c
->initializer
);
14677 c
->initializer
= NULL
;
14680 init
= c
->initializer
;
14685 for (c
= sym
->components
; c
; c
= c
->next
)
14686 if (!resolve_component (c
, sym
))
14692 if (sym
->components
)
14693 add_dt_to_dt_list (sym
);
14699 /* Resolve the components of a derived type. This does not have to wait until
14700 resolution stage, but can be done as soon as the dt declaration has been
14704 resolve_fl_derived0 (gfc_symbol
*sym
)
14706 gfc_symbol
* super_type
;
14708 gfc_formal_arglist
*f
;
14711 if (sym
->attr
.unlimited_polymorphic
)
14714 super_type
= gfc_get_derived_super_type (sym
);
14717 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14719 gfc_error ("As extending type %qs at %L has a coarray component, "
14720 "parent type %qs shall also have one", sym
->name
,
14721 &sym
->declared_at
, super_type
->name
);
14725 /* Ensure the extended type gets resolved before we do. */
14726 if (super_type
&& !resolve_fl_derived0 (super_type
))
14729 /* An ABSTRACT type must be extensible. */
14730 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14732 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14733 sym
->name
, &sym
->declared_at
);
14737 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14741 for ( ; c
!= NULL
; c
= c
->next
)
14742 if (!resolve_component (c
, sym
))
14748 /* Now add the caf token field, where needed. */
14749 if (flag_coarray
!= GFC_FCOARRAY_NONE
14750 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14752 for (c
= sym
->components
; c
; c
= c
->next
)
14753 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14754 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14756 char name
[GFC_MAX_SYMBOL_LEN
+9];
14757 gfc_component
*token
;
14758 sprintf (name
, "_caf_%s", c
->name
);
14759 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14762 if (!gfc_add_component (sym
, name
, &token
))
14764 token
->ts
.type
= BT_VOID
;
14765 token
->ts
.kind
= gfc_default_integer_kind
;
14766 token
->attr
.access
= ACCESS_PRIVATE
;
14767 token
->attr
.artificial
= 1;
14768 token
->attr
.caf_token
= 1;
14773 check_defined_assignments (sym
);
14775 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14776 sym
->attr
.defined_assign_comp
14777 = super_type
->attr
.defined_assign_comp
;
14779 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14780 all DEFERRED bindings are overridden. */
14781 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14782 && !sym
->attr
.is_class
14783 && !ensure_not_abstract (sym
, super_type
))
14786 /* Check that there is a component for every PDT parameter. */
14787 if (sym
->attr
.pdt_template
)
14789 for (f
= sym
->formal
; f
; f
= f
->next
)
14793 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14796 gfc_error ("Parameterized type %qs does not have a component "
14797 "corresponding to parameter %qs at %L", sym
->name
,
14798 f
->sym
->name
, &sym
->declared_at
);
14804 /* Add derived type to the derived type list. */
14805 add_dt_to_dt_list (sym
);
14811 /* The following procedure does the full resolution of a derived type,
14812 including resolution of all type-bound procedures (if present). In contrast
14813 to 'resolve_fl_derived0' this can only be done after the module has been
14814 parsed completely. */
14817 resolve_fl_derived (gfc_symbol
*sym
)
14819 gfc_symbol
*gen_dt
= NULL
;
14821 if (sym
->attr
.unlimited_polymorphic
)
14824 if (!sym
->attr
.is_class
)
14825 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14826 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14827 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14828 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14829 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14830 "%qs at %L being the same name as derived "
14831 "type at %L", sym
->name
,
14832 gen_dt
->generic
->sym
== sym
14833 ? gen_dt
->generic
->next
->sym
->name
14834 : gen_dt
->generic
->sym
->name
,
14835 gen_dt
->generic
->sym
== sym
14836 ? &gen_dt
->generic
->next
->sym
->declared_at
14837 : &gen_dt
->generic
->sym
->declared_at
,
14838 &sym
->declared_at
))
14841 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14843 gfc_error ("Derived type %qs at %L has not been declared",
14844 sym
->name
, &sym
->declared_at
);
14848 /* Resolve the finalizer procedures. */
14849 if (!gfc_resolve_finalizers (sym
, NULL
))
14852 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14854 /* Fix up incomplete CLASS symbols. */
14855 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14856 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14858 /* Nothing more to do for unlimited polymorphic entities. */
14859 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14861 else if (vptr
->ts
.u
.derived
== NULL
)
14863 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14865 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14866 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14871 if (!resolve_fl_derived0 (sym
))
14874 /* Resolve the type-bound procedures. */
14875 if (!resolve_typebound_procedures (sym
))
14878 /* Generate module vtables subject to their accessibility and their not
14879 being vtables or pdt templates. If this is not done class declarations
14880 in external procedures wind up with their own version and so SELECT TYPE
14881 fails because the vptrs do not have the same address. */
14882 if (gfc_option
.allow_std
& GFC_STD_F2003
14883 && sym
->ns
->proc_name
14884 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14885 && sym
->attr
.access
!= ACCESS_PRIVATE
14886 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14888 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14889 gfc_set_sym_referenced (vtab
);
14897 resolve_fl_namelist (gfc_symbol
*sym
)
14902 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14904 /* Check again, the check in match only works if NAMELIST comes
14906 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14908 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14909 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14913 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14914 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14915 "with assumed shape in namelist %qs at %L",
14916 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14919 if (is_non_constant_shape_array (nl
->sym
)
14920 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14921 "with nonconstant shape in namelist %qs at %L",
14922 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14925 if (nl
->sym
->ts
.type
== BT_CHARACTER
14926 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14927 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14928 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14929 "nonconstant character length in "
14930 "namelist %qs at %L", nl
->sym
->name
,
14931 sym
->name
, &sym
->declared_at
))
14936 /* Reject PRIVATE objects in a PUBLIC namelist. */
14937 if (gfc_check_symbol_access (sym
))
14939 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14941 if (!nl
->sym
->attr
.use_assoc
14942 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14943 && !gfc_check_symbol_access (nl
->sym
))
14945 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14946 "cannot be member of PUBLIC namelist %qs at %L",
14947 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14951 if (nl
->sym
->ts
.type
== BT_DERIVED
14952 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14953 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14955 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14956 "namelist %qs at %L with ALLOCATABLE "
14957 "or POINTER components", nl
->sym
->name
,
14958 sym
->name
, &sym
->declared_at
))
14963 /* Types with private components that came here by USE-association. */
14964 if (nl
->sym
->ts
.type
== BT_DERIVED
14965 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14967 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14968 "components and cannot be member of namelist %qs at %L",
14969 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14973 /* Types with private components that are defined in the same module. */
14974 if (nl
->sym
->ts
.type
== BT_DERIVED
14975 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14976 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14978 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14979 "cannot be a member of PUBLIC namelist %qs at %L",
14980 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14987 /* 14.1.2 A module or internal procedure represent local entities
14988 of the same type as a namelist member and so are not allowed. */
14989 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14991 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14994 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14995 if ((nl
->sym
== sym
->ns
->proc_name
)
14997 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
15002 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
15003 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
15005 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
15006 "attribute in %qs at %L", nlsym
->name
,
15007 &sym
->declared_at
);
15014 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
15015 nl
->sym
->attr
.asynchronous
= 1;
15022 resolve_fl_parameter (gfc_symbol
*sym
)
15024 /* A parameter array's shape needs to be constant. */
15025 if (sym
->as
!= NULL
15026 && (sym
->as
->type
== AS_DEFERRED
15027 || is_non_constant_shape_array (sym
)))
15029 gfc_error ("Parameter array %qs at %L cannot be automatic "
15030 "or of deferred shape", sym
->name
, &sym
->declared_at
);
15034 /* Constraints on deferred type parameter. */
15035 if (!deferred_requirements (sym
))
15038 /* Make sure a parameter that has been implicitly typed still
15039 matches the implicit type, since PARAMETER statements can precede
15040 IMPLICIT statements. */
15041 if (sym
->attr
.implicit_type
15042 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
15045 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
15046 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
15050 /* Make sure the types of derived parameters are consistent. This
15051 type checking is deferred until resolution because the type may
15052 refer to a derived type from the host. */
15053 if (sym
->ts
.type
== BT_DERIVED
15054 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
15056 gfc_error ("Incompatible derived type in PARAMETER at %L",
15057 &sym
->value
->where
);
15061 /* F03:C509,C514. */
15062 if (sym
->ts
.type
== BT_CLASS
)
15064 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
15065 sym
->name
, &sym
->declared_at
);
15073 /* Called by resolve_symbol to check PDTs. */
15076 resolve_pdt (gfc_symbol
* sym
)
15078 gfc_symbol
*derived
= NULL
;
15079 gfc_actual_arglist
*param
;
15081 bool const_len_exprs
= true;
15082 bool assumed_len_exprs
= false;
15083 symbol_attribute
*attr
;
15085 if (sym
->ts
.type
== BT_DERIVED
)
15087 derived
= sym
->ts
.u
.derived
;
15088 attr
= &(sym
->attr
);
15090 else if (sym
->ts
.type
== BT_CLASS
)
15092 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
15093 attr
= &(CLASS_DATA (sym
)->attr
);
15096 gcc_unreachable ();
15098 gcc_assert (derived
->attr
.pdt_type
);
15100 for (param
= sym
->param_list
; param
; param
= param
->next
)
15102 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
15104 if (c
->attr
.pdt_kind
)
15107 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
15108 && c
->attr
.pdt_len
)
15109 const_len_exprs
= false;
15110 else if (param
->spec_type
== SPEC_ASSUMED
)
15111 assumed_len_exprs
= true;
15113 if (param
->spec_type
== SPEC_DEFERRED
15114 && !attr
->allocatable
&& !attr
->pointer
)
15115 gfc_error ("The object %qs at %L has a deferred LEN "
15116 "parameter %qs and is neither allocatable "
15117 "nor a pointer", sym
->name
, &sym
->declared_at
,
15122 if (!const_len_exprs
15123 && (sym
->ns
->proc_name
->attr
.is_main_program
15124 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15125 || sym
->attr
.save
!= SAVE_NONE
))
15126 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
15127 "SAVE attribute or be a variable declared in the "
15128 "main program, a module or a submodule(F08/C513)",
15129 sym
->name
, &sym
->declared_at
);
15131 if (assumed_len_exprs
&& !(sym
->attr
.dummy
15132 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
15133 gfc_error ("The object %qs at %L with ASSUMED type parameters "
15134 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
15135 sym
->name
, &sym
->declared_at
);
15139 /* Do anything necessary to resolve a symbol. Right now, we just
15140 assume that an otherwise unknown symbol is a variable. This sort
15141 of thing commonly happens for symbols in module. */
15144 resolve_symbol (gfc_symbol
*sym
)
15146 int check_constant
, mp_flag
;
15147 gfc_symtree
*symtree
;
15148 gfc_symtree
*this_symtree
;
15151 symbol_attribute class_attr
;
15152 gfc_array_spec
*as
;
15153 bool saved_specification_expr
;
15159 /* No symbol will ever have union type; only components can be unions.
15160 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15161 (just like derived type declaration symbols have flavor FL_DERIVED). */
15162 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15164 /* Coarrayed polymorphic objects with allocatable or pointer components are
15165 yet unsupported for -fcoarray=lib. */
15166 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15167 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15168 && CLASS_DATA (sym
)->attr
.codimension
15169 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15170 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15172 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15173 "type coarrays at %L are unsupported", &sym
->declared_at
);
15177 if (sym
->attr
.artificial
)
15180 if (sym
->attr
.unlimited_polymorphic
)
15183 if (sym
->attr
.flavor
== FL_UNKNOWN
15184 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15185 && !sym
->attr
.generic
&& !sym
->attr
.external
15186 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15187 && sym
->ts
.type
== BT_UNKNOWN
))
15190 /* If we find that a flavorless symbol is an interface in one of the
15191 parent namespaces, find its symtree in this namespace, free the
15192 symbol and set the symtree to point to the interface symbol. */
15193 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15195 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15196 if (symtree
&& (symtree
->n
.sym
->generic
||
15197 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15198 && sym
->ns
->construct_entities
)))
15200 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15202 if (this_symtree
->n
.sym
== sym
)
15204 symtree
->n
.sym
->refs
++;
15205 gfc_release_symbol (sym
);
15206 this_symtree
->n
.sym
= symtree
->n
.sym
;
15212 /* Otherwise give it a flavor according to such attributes as
15214 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15215 && sym
->attr
.intrinsic
== 0)
15216 sym
->attr
.flavor
= FL_VARIABLE
;
15217 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15219 sym
->attr
.flavor
= FL_PROCEDURE
;
15220 if (sym
->attr
.dimension
)
15221 sym
->attr
.function
= 1;
15225 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15226 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15228 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15229 && !resolve_procedure_interface (sym
))
15232 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15233 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15235 if (sym
->attr
.external
)
15236 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15237 "at %L", &sym
->declared_at
);
15239 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15240 "at %L", &sym
->declared_at
);
15245 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15248 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15249 && !resolve_fl_struct (sym
))
15252 /* Symbols that are module procedures with results (functions) have
15253 the types and array specification copied for type checking in
15254 procedures that call them, as well as for saving to a module
15255 file. These symbols can't stand the scrutiny that their results
15257 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15259 /* Make sure that the intrinsic is consistent with its internal
15260 representation. This needs to be done before assigning a default
15261 type to avoid spurious warnings. */
15262 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15263 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15266 /* Resolve associate names. */
15268 resolve_assoc_var (sym
, true);
15270 /* Assign default type to symbols that need one and don't have one. */
15271 if (sym
->ts
.type
== BT_UNKNOWN
)
15273 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15275 gfc_set_default_type (sym
, 1, NULL
);
15278 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15279 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15280 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15281 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15283 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15285 /* The specific case of an external procedure should emit an error
15286 in the case that there is no implicit type. */
15289 if (!sym
->attr
.mixed_entry_master
)
15290 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15294 /* Result may be in another namespace. */
15295 resolve_symbol (sym
->result
);
15297 if (!sym
->result
->attr
.proc_pointer
)
15299 sym
->ts
= sym
->result
->ts
;
15300 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15301 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15302 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15303 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15304 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15309 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15311 bool saved_specification_expr
= specification_expr
;
15312 specification_expr
= true;
15313 gfc_resolve_array_spec (sym
->result
->as
, false);
15314 specification_expr
= saved_specification_expr
;
15317 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15319 as
= CLASS_DATA (sym
)->as
;
15320 class_attr
= CLASS_DATA (sym
)->attr
;
15321 class_attr
.pointer
= class_attr
.class_pointer
;
15325 class_attr
= sym
->attr
;
15330 if (sym
->attr
.contiguous
15331 && (!class_attr
.dimension
15332 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15333 && !class_attr
.pointer
)))
15335 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15336 "array pointer or an assumed-shape or assumed-rank array",
15337 sym
->name
, &sym
->declared_at
);
15341 /* Assumed size arrays and assumed shape arrays must be dummy
15342 arguments. Array-spec's of implied-shape should have been resolved to
15343 AS_EXPLICIT already. */
15347 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15348 specification expression. */
15349 if (as
->type
== AS_IMPLIED_SHAPE
)
15352 for (i
=0; i
<as
->rank
; i
++)
15354 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15356 gfc_error ("Bad specification for assumed size array at %L",
15357 &as
->lower
[i
]->where
);
15364 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15365 || as
->type
== AS_ASSUMED_SHAPE
)
15366 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15368 if (as
->type
== AS_ASSUMED_SIZE
)
15369 gfc_error ("Assumed size array at %L must be a dummy argument",
15370 &sym
->declared_at
);
15372 gfc_error ("Assumed shape array at %L must be a dummy argument",
15373 &sym
->declared_at
);
15376 /* TS 29113, C535a. */
15377 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15378 && !sym
->attr
.select_type_temporary
15379 && !(cs_base
&& cs_base
->current
15380 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15382 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15383 &sym
->declared_at
);
15386 if (as
->type
== AS_ASSUMED_RANK
15387 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15389 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15390 "CODIMENSION attribute", &sym
->declared_at
);
15395 /* Make sure symbols with known intent or optional are really dummy
15396 variable. Because of ENTRY statement, this has to be deferred
15397 until resolution time. */
15399 if (!sym
->attr
.dummy
15400 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15402 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15406 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15408 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15409 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15413 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15415 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15416 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15418 gfc_error ("Character dummy variable %qs at %L with VALUE "
15419 "attribute must have constant length",
15420 sym
->name
, &sym
->declared_at
);
15424 if (sym
->ts
.is_c_interop
15425 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15427 gfc_error ("C interoperable character dummy variable %qs at %L "
15428 "with VALUE attribute must have length one",
15429 sym
->name
, &sym
->declared_at
);
15434 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15435 && sym
->ts
.u
.derived
->attr
.generic
)
15437 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15438 if (!sym
->ts
.u
.derived
)
15440 gfc_error ("The derived type %qs at %L is of type %qs, "
15441 "which has not been defined", sym
->name
,
15442 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15443 sym
->ts
.type
= BT_UNKNOWN
;
15448 /* Use the same constraints as TYPE(*), except for the type check
15449 and that only scalars and assumed-size arrays are permitted. */
15450 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15452 if (!sym
->attr
.dummy
)
15454 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15455 "a dummy argument", sym
->name
, &sym
->declared_at
);
15459 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15460 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15461 && sym
->ts
.type
!= BT_COMPLEX
)
15463 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15464 "of type TYPE(*) or of an numeric intrinsic type",
15465 sym
->name
, &sym
->declared_at
);
15469 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15470 || sym
->attr
.pointer
|| sym
->attr
.value
)
15472 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15473 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15474 "attribute", sym
->name
, &sym
->declared_at
);
15478 if (sym
->attr
.intent
== INTENT_OUT
)
15480 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15481 "have the INTENT(OUT) attribute",
15482 sym
->name
, &sym
->declared_at
);
15485 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15487 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15488 "either be a scalar or an assumed-size array",
15489 sym
->name
, &sym
->declared_at
);
15493 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15494 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15496 sym
->ts
.type
= BT_ASSUMED
;
15497 sym
->as
= gfc_get_array_spec ();
15498 sym
->as
->type
= AS_ASSUMED_SIZE
;
15500 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15502 else if (sym
->ts
.type
== BT_ASSUMED
)
15504 /* TS 29113, C407a. */
15505 if (!sym
->attr
.dummy
)
15507 gfc_error ("Assumed type of variable %s at %L is only permitted "
15508 "for dummy variables", sym
->name
, &sym
->declared_at
);
15511 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15512 || sym
->attr
.pointer
|| sym
->attr
.value
)
15514 gfc_error ("Assumed-type variable %s at %L may not have the "
15515 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15516 sym
->name
, &sym
->declared_at
);
15519 if (sym
->attr
.intent
== INTENT_OUT
)
15521 gfc_error ("Assumed-type variable %s at %L may not have the "
15522 "INTENT(OUT) attribute",
15523 sym
->name
, &sym
->declared_at
);
15526 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15528 gfc_error ("Assumed-type variable %s at %L shall not be an "
15529 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15534 /* If the symbol is marked as bind(c), that it is declared at module level
15535 scope and verify its type and kind. Do not do the latter for symbols
15536 that are implicitly typed because that is handled in
15537 gfc_set_default_type. Handle dummy arguments and procedure definitions
15538 separately. Also, anything that is use associated is not handled here
15539 but instead is handled in the module it is declared in. Finally, derived
15540 type definitions are allowed to be BIND(C) since that only implies that
15541 they're interoperable, and they are checked fully for interoperability
15542 when a variable is declared of that type. */
15543 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15544 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15545 && sym
->attr
.flavor
!= FL_DERIVED
)
15549 /* First, make sure the variable is declared at the
15550 module-level scope (J3/04-007, Section 15.3). */
15551 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15552 sym
->attr
.in_common
== 0)
15554 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15555 "is neither a COMMON block nor declared at the "
15556 "module level scope", sym
->name
, &(sym
->declared_at
));
15559 else if (sym
->ts
.type
== BT_CHARACTER
15560 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15561 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15562 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15564 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15565 sym
->name
, &sym
->declared_at
);
15568 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15570 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15572 else if (sym
->attr
.implicit_type
== 0)
15574 /* If type() declaration, we need to verify that the components
15575 of the given type are all C interoperable, etc. */
15576 if (sym
->ts
.type
== BT_DERIVED
&&
15577 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15579 /* Make sure the user marked the derived type as BIND(C). If
15580 not, call the verify routine. This could print an error
15581 for the derived type more than once if multiple variables
15582 of that type are declared. */
15583 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15584 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15588 /* Verify the variable itself as C interoperable if it
15589 is BIND(C). It is not possible for this to succeed if
15590 the verify_bind_c_derived_type failed, so don't have to handle
15591 any error returned by verify_bind_c_derived_type. */
15592 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15593 sym
->common_block
);
15598 /* clear the is_bind_c flag to prevent reporting errors more than
15599 once if something failed. */
15600 sym
->attr
.is_bind_c
= 0;
15605 /* If a derived type symbol has reached this point, without its
15606 type being declared, we have an error. Notice that most
15607 conditions that produce undefined derived types have already
15608 been dealt with. However, the likes of:
15609 implicit type(t) (t) ..... call foo (t) will get us here if
15610 the type is not declared in the scope of the implicit
15611 statement. Change the type to BT_UNKNOWN, both because it is so
15612 and to prevent an ICE. */
15613 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15614 && sym
->ts
.u
.derived
->components
== NULL
15615 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15617 gfc_error ("The derived type %qs at %L is of type %qs, "
15618 "which has not been defined", sym
->name
,
15619 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15620 sym
->ts
.type
= BT_UNKNOWN
;
15624 /* Make sure that the derived type has been resolved and that the
15625 derived type is visible in the symbol's namespace, if it is a
15626 module function and is not PRIVATE. */
15627 if (sym
->ts
.type
== BT_DERIVED
15628 && sym
->ts
.u
.derived
->attr
.use_assoc
15629 && sym
->ns
->proc_name
15630 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15631 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15634 /* Unless the derived-type declaration is use associated, Fortran 95
15635 does not allow public entries of private derived types.
15636 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15637 161 in 95-006r3. */
15638 if (sym
->ts
.type
== BT_DERIVED
15639 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15640 && !sym
->ts
.u
.derived
->attr
.use_assoc
15641 && gfc_check_symbol_access (sym
)
15642 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15643 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15644 "derived type %qs",
15645 (sym
->attr
.flavor
== FL_PARAMETER
)
15646 ? "parameter" : "variable",
15647 sym
->name
, &sym
->declared_at
,
15648 sym
->ts
.u
.derived
->name
))
15651 /* F2008, C1302. */
15652 if (sym
->ts
.type
== BT_DERIVED
15653 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15654 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15655 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15656 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15658 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15659 "type LOCK_TYPE must be a coarray", sym
->name
,
15660 &sym
->declared_at
);
15664 /* TS18508, C702/C703. */
15665 if (sym
->ts
.type
== BT_DERIVED
15666 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15667 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15668 || sym
->ts
.u
.derived
->attr
.event_comp
)
15669 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15671 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15672 "type EVENT_TYPE must be a coarray", sym
->name
,
15673 &sym
->declared_at
);
15677 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15678 default initialization is defined (5.1.2.4.4). */
15679 if (sym
->ts
.type
== BT_DERIVED
15681 && sym
->attr
.intent
== INTENT_OUT
15683 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15685 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15687 if (c
->initializer
)
15689 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15690 "ASSUMED SIZE and so cannot have a default initializer",
15691 sym
->name
, &sym
->declared_at
);
15698 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15699 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15701 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15702 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15707 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15708 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15710 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15711 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15716 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15717 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15718 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15719 || class_attr
.codimension
)
15720 && (sym
->attr
.result
|| sym
->result
== sym
))
15722 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15723 "a coarray component", sym
->name
, &sym
->declared_at
);
15728 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15729 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15731 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15732 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15737 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15738 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15739 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15740 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15741 || class_attr
.allocatable
))
15743 gfc_error ("Variable %qs at %L with coarray component shall be a "
15744 "nonpointer, nonallocatable scalar, which is not a coarray",
15745 sym
->name
, &sym
->declared_at
);
15749 /* F2008, C526. The function-result case was handled above. */
15750 if (class_attr
.codimension
15751 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15752 || sym
->attr
.select_type_temporary
15753 || sym
->attr
.associate_var
15754 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15755 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15756 || sym
->ns
->proc_name
->attr
.is_main_program
15757 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15759 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15760 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15764 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15765 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15767 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15768 "deferred shape", sym
->name
, &sym
->declared_at
);
15771 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15772 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15774 gfc_error ("Allocatable coarray variable %qs at %L must have "
15775 "deferred shape", sym
->name
, &sym
->declared_at
);
15780 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15781 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15782 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15783 || (class_attr
.codimension
&& class_attr
.allocatable
))
15784 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15786 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15787 "allocatable coarray or have coarray components",
15788 sym
->name
, &sym
->declared_at
);
15792 if (class_attr
.codimension
&& sym
->attr
.dummy
15793 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15795 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15796 "procedure %qs", sym
->name
, &sym
->declared_at
,
15797 sym
->ns
->proc_name
->name
);
15801 if (sym
->ts
.type
== BT_LOGICAL
15802 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15803 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15804 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15807 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15808 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15810 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15811 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15812 "%L with non-C_Bool kind in BIND(C) procedure "
15813 "%qs", sym
->name
, &sym
->declared_at
,
15814 sym
->ns
->proc_name
->name
))
15816 else if (!gfc_logical_kinds
[i
].c_bool
15817 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15818 "%qs at %L with non-C_Bool kind in "
15819 "BIND(C) procedure %qs", sym
->name
,
15821 sym
->attr
.function
? sym
->name
15822 : sym
->ns
->proc_name
->name
))
15826 switch (sym
->attr
.flavor
)
15829 if (!resolve_fl_variable (sym
, mp_flag
))
15834 if (sym
->formal
&& !sym
->formal_ns
)
15836 /* Check that none of the arguments are a namelist. */
15837 gfc_formal_arglist
*formal
= sym
->formal
;
15839 for (; formal
; formal
= formal
->next
)
15840 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15842 gfc_error ("Namelist %qs cannot be an argument to "
15843 "subroutine or function at %L",
15844 formal
->sym
->name
, &sym
->declared_at
);
15849 if (!resolve_fl_procedure (sym
, mp_flag
))
15854 if (!resolve_fl_namelist (sym
))
15859 if (!resolve_fl_parameter (sym
))
15867 /* Resolve array specifier. Check as well some constraints
15868 on COMMON blocks. */
15870 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15872 /* Set the formal_arg_flag so that check_conflict will not throw
15873 an error for host associated variables in the specification
15874 expression for an array_valued function. */
15875 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15876 formal_arg_flag
= true;
15878 saved_specification_expr
= specification_expr
;
15879 specification_expr
= true;
15880 gfc_resolve_array_spec (sym
->as
, check_constant
);
15881 specification_expr
= saved_specification_expr
;
15883 formal_arg_flag
= false;
15885 /* Resolve formal namespaces. */
15886 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15887 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15888 gfc_resolve (sym
->formal_ns
);
15890 /* Make sure the formal namespace is present. */
15891 if (sym
->formal
&& !sym
->formal_ns
)
15893 gfc_formal_arglist
*formal
= sym
->formal
;
15894 while (formal
&& !formal
->sym
)
15895 formal
= formal
->next
;
15899 sym
->formal_ns
= formal
->sym
->ns
;
15900 if (sym
->ns
!= formal
->sym
->ns
)
15901 sym
->formal_ns
->refs
++;
15905 /* Check threadprivate restrictions. */
15906 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15907 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15908 && (!sym
->attr
.in_common
15909 && sym
->module
== NULL
15910 && (sym
->ns
->proc_name
== NULL
15911 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15912 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15914 /* Check omp declare target restrictions. */
15915 if (sym
->attr
.omp_declare_target
15916 && sym
->attr
.flavor
== FL_VARIABLE
15918 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15919 && (!sym
->attr
.in_common
15920 && sym
->module
== NULL
15921 && (sym
->ns
->proc_name
== NULL
15922 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15923 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15924 sym
->name
, &sym
->declared_at
);
15926 /* If we have come this far we can apply default-initializers, as
15927 described in 14.7.5, to those variables that have not already
15928 been assigned one. */
15929 if (sym
->ts
.type
== BT_DERIVED
15931 && !sym
->attr
.allocatable
15932 && !sym
->attr
.alloc_comp
)
15934 symbol_attribute
*a
= &sym
->attr
;
15936 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15937 && !a
->in_common
&& !a
->use_assoc
15939 && !((a
->function
|| a
->result
)
15941 || sym
->ts
.u
.derived
->attr
.alloc_comp
15942 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15943 && !(a
->function
&& sym
!= sym
->result
))
15944 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15945 apply_default_init (sym
);
15946 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15947 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15948 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15949 /* Mark the result symbol to be referenced, when it has allocatable
15951 sym
->result
->attr
.referenced
= 1;
15954 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15955 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15956 && !CLASS_DATA (sym
)->attr
.class_pointer
15957 && !CLASS_DATA (sym
)->attr
.allocatable
)
15958 apply_default_init (sym
);
15960 /* If this symbol has a type-spec, check it. */
15961 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15962 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15963 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15966 if (sym
->param_list
)
15971 /************* Resolve DATA statements *************/
15975 gfc_data_value
*vnode
;
15981 /* Advance the values structure to point to the next value in the data list. */
15984 next_data_value (void)
15986 while (mpz_cmp_ui (values
.left
, 0) == 0)
15989 if (values
.vnode
->next
== NULL
)
15992 values
.vnode
= values
.vnode
->next
;
15993 mpz_set (values
.left
, values
.vnode
->repeat
);
16001 check_data_variable (gfc_data_variable
*var
, locus
*where
)
16007 ar_type mark
= AR_UNKNOWN
;
16009 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
16015 if (!gfc_resolve_expr (var
->expr
))
16019 mpz_init_set_si (offset
, 0);
16022 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
16023 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
16024 e
= e
->value
.function
.actual
->expr
;
16026 if (e
->expr_type
!= EXPR_VARIABLE
)
16028 gfc_error ("Expecting definable entity near %L", where
);
16032 sym
= e
->symtree
->n
.sym
;
16034 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
16036 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
16037 sym
->name
, &sym
->declared_at
);
16041 if (e
->ref
== NULL
&& sym
->as
)
16043 gfc_error ("DATA array %qs at %L must be specified in a previous"
16044 " declaration", sym
->name
, where
);
16048 if (gfc_is_coindexed (e
))
16050 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
16055 has_pointer
= sym
->attr
.pointer
;
16057 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16059 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
16064 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
16066 gfc_error ("DATA element %qs at %L is a pointer and so must "
16067 "be a full array", sym
->name
, where
);
16071 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
16073 gfc_error ("DATA object near %L has the pointer attribute "
16074 "and the corresponding DATA value is not a valid "
16075 "initial-data-target", where
);
16081 if (e
->rank
== 0 || has_pointer
)
16083 mpz_init_set_ui (size
, 1);
16090 /* Find the array section reference. */
16091 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
16093 if (ref
->type
!= REF_ARRAY
)
16095 if (ref
->u
.ar
.type
== AR_ELEMENT
)
16101 /* Set marks according to the reference pattern. */
16102 switch (ref
->u
.ar
.type
)
16110 /* Get the start position of array section. */
16111 gfc_get_section_index (ar
, section_index
, &offset
);
16116 gcc_unreachable ();
16119 if (!gfc_array_size (e
, &size
))
16121 gfc_error ("Nonconstant array section at %L in DATA statement",
16123 mpz_clear (offset
);
16130 while (mpz_cmp_ui (size
, 0) > 0)
16132 if (!next_data_value ())
16134 gfc_error ("DATA statement at %L has more variables than values",
16140 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16144 /* If we have more than one element left in the repeat count,
16145 and we have more than one element left in the target variable,
16146 then create a range assignment. */
16147 /* FIXME: Only done for full arrays for now, since array sections
16149 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16150 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16154 if (mpz_cmp (size
, values
.left
) >= 0)
16156 mpz_init_set (range
, values
.left
);
16157 mpz_sub (size
, size
, values
.left
);
16158 mpz_set_ui (values
.left
, 0);
16162 mpz_init_set (range
, size
);
16163 mpz_sub (values
.left
, values
.left
, size
);
16164 mpz_set_ui (size
, 0);
16167 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16170 mpz_add (offset
, offset
, range
);
16177 /* Assign initial value to symbol. */
16180 mpz_sub_ui (values
.left
, values
.left
, 1);
16181 mpz_sub_ui (size
, size
, 1);
16183 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16188 if (mark
== AR_FULL
)
16189 mpz_add_ui (offset
, offset
, 1);
16191 /* Modify the array section indexes and recalculate the offset
16192 for next element. */
16193 else if (mark
== AR_SECTION
)
16194 gfc_advance_section (section_index
, ar
, &offset
);
16198 if (mark
== AR_SECTION
)
16200 for (i
= 0; i
< ar
->dimen
; i
++)
16201 mpz_clear (section_index
[i
]);
16205 mpz_clear (offset
);
16211 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16213 /* Iterate over a list of elements in a DATA statement. */
16216 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16219 iterator_stack frame
;
16220 gfc_expr
*e
, *start
, *end
, *step
;
16221 bool retval
= true;
16223 mpz_init (frame
.value
);
16226 start
= gfc_copy_expr (var
->iter
.start
);
16227 end
= gfc_copy_expr (var
->iter
.end
);
16228 step
= gfc_copy_expr (var
->iter
.step
);
16230 if (!gfc_simplify_expr (start
, 1)
16231 || start
->expr_type
!= EXPR_CONSTANT
)
16233 gfc_error ("start of implied-do loop at %L could not be "
16234 "simplified to a constant value", &start
->where
);
16238 if (!gfc_simplify_expr (end
, 1)
16239 || end
->expr_type
!= EXPR_CONSTANT
)
16241 gfc_error ("end of implied-do loop at %L could not be "
16242 "simplified to a constant value", &start
->where
);
16246 if (!gfc_simplify_expr (step
, 1)
16247 || step
->expr_type
!= EXPR_CONSTANT
)
16249 gfc_error ("step of implied-do loop at %L could not be "
16250 "simplified to a constant value", &start
->where
);
16255 mpz_set (trip
, end
->value
.integer
);
16256 mpz_sub (trip
, trip
, start
->value
.integer
);
16257 mpz_add (trip
, trip
, step
->value
.integer
);
16259 mpz_div (trip
, trip
, step
->value
.integer
);
16261 mpz_set (frame
.value
, start
->value
.integer
);
16263 frame
.prev
= iter_stack
;
16264 frame
.variable
= var
->iter
.var
->symtree
;
16265 iter_stack
= &frame
;
16267 while (mpz_cmp_ui (trip
, 0) > 0)
16269 if (!traverse_data_var (var
->list
, where
))
16275 e
= gfc_copy_expr (var
->expr
);
16276 if (!gfc_simplify_expr (e
, 1))
16283 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16285 mpz_sub_ui (trip
, trip
, 1);
16289 mpz_clear (frame
.value
);
16292 gfc_free_expr (start
);
16293 gfc_free_expr (end
);
16294 gfc_free_expr (step
);
16296 iter_stack
= frame
.prev
;
16301 /* Type resolve variables in the variable list of a DATA statement. */
16304 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16308 for (; var
; var
= var
->next
)
16310 if (var
->expr
== NULL
)
16311 t
= traverse_data_list (var
, where
);
16313 t
= check_data_variable (var
, where
);
16323 /* Resolve the expressions and iterators associated with a data statement.
16324 This is separate from the assignment checking because data lists should
16325 only be resolved once. */
16328 resolve_data_variables (gfc_data_variable
*d
)
16330 for (; d
; d
= d
->next
)
16332 if (d
->list
== NULL
)
16334 if (!gfc_resolve_expr (d
->expr
))
16339 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16342 if (!resolve_data_variables (d
->list
))
16351 /* Resolve a single DATA statement. We implement this by storing a pointer to
16352 the value list into static variables, and then recursively traversing the
16353 variables list, expanding iterators and such. */
16356 resolve_data (gfc_data
*d
)
16359 if (!resolve_data_variables (d
->var
))
16362 values
.vnode
= d
->value
;
16363 if (d
->value
== NULL
)
16364 mpz_set_ui (values
.left
, 0);
16366 mpz_set (values
.left
, d
->value
->repeat
);
16368 if (!traverse_data_var (d
->var
, &d
->where
))
16371 /* At this point, we better not have any values left. */
16373 if (next_data_value ())
16374 gfc_error ("DATA statement at %L has more values than variables",
16379 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16380 accessed by host or use association, is a dummy argument to a pure function,
16381 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16382 is storage associated with any such variable, shall not be used in the
16383 following contexts: (clients of this function). */
16385 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16386 procedure. Returns zero if assignment is OK, nonzero if there is a
16389 gfc_impure_variable (gfc_symbol
*sym
)
16394 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16397 /* Check if the symbol's ns is inside the pure procedure. */
16398 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16402 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16406 proc
= sym
->ns
->proc_name
;
16407 if (sym
->attr
.dummy
16408 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16409 || proc
->attr
.function
))
16412 /* TODO: Sort out what can be storage associated, if anything, and include
16413 it here. In principle equivalences should be scanned but it does not
16414 seem to be possible to storage associate an impure variable this way. */
16419 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16420 current namespace is inside a pure procedure. */
16423 gfc_pure (gfc_symbol
*sym
)
16425 symbol_attribute attr
;
16430 /* Check if the current namespace or one of its parents
16431 belongs to a pure procedure. */
16432 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16434 sym
= ns
->proc_name
;
16438 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16446 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16450 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16451 checks if the current namespace is implicitly pure. Note that this
16452 function returns false for a PURE procedure. */
16455 gfc_implicit_pure (gfc_symbol
*sym
)
16461 /* Check if the current procedure is implicit_pure. Walk up
16462 the procedure list until we find a procedure. */
16463 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16465 sym
= ns
->proc_name
;
16469 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16474 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16475 && !sym
->attr
.pure
;
16480 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16486 /* Check if the current procedure is implicit_pure. Walk up
16487 the procedure list until we find a procedure. */
16488 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16490 sym
= ns
->proc_name
;
16494 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16499 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16500 sym
->attr
.implicit_pure
= 0;
16502 sym
->attr
.pure
= 0;
16506 /* Test whether the current procedure is elemental or not. */
16509 gfc_elemental (gfc_symbol
*sym
)
16511 symbol_attribute attr
;
16514 sym
= gfc_current_ns
->proc_name
;
16519 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16523 /* Warn about unused labels. */
16526 warn_unused_fortran_label (gfc_st_label
*label
)
16531 warn_unused_fortran_label (label
->left
);
16533 if (label
->defined
== ST_LABEL_UNKNOWN
)
16536 switch (label
->referenced
)
16538 case ST_LABEL_UNKNOWN
:
16539 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16540 label
->value
, &label
->where
);
16543 case ST_LABEL_BAD_TARGET
:
16544 gfc_warning (OPT_Wunused_label
,
16545 "Label %d at %L defined but cannot be used",
16546 label
->value
, &label
->where
);
16553 warn_unused_fortran_label (label
->right
);
16557 /* Returns the sequence type of a symbol or sequence. */
16560 sequence_type (gfc_typespec ts
)
16569 if (ts
.u
.derived
->components
== NULL
)
16570 return SEQ_NONDEFAULT
;
16572 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16573 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16574 if (sequence_type (c
->ts
) != result
)
16580 if (ts
.kind
!= gfc_default_character_kind
)
16581 return SEQ_NONDEFAULT
;
16583 return SEQ_CHARACTER
;
16586 if (ts
.kind
!= gfc_default_integer_kind
)
16587 return SEQ_NONDEFAULT
;
16589 return SEQ_NUMERIC
;
16592 if (!(ts
.kind
== gfc_default_real_kind
16593 || ts
.kind
== gfc_default_double_kind
))
16594 return SEQ_NONDEFAULT
;
16596 return SEQ_NUMERIC
;
16599 if (ts
.kind
!= gfc_default_complex_kind
)
16600 return SEQ_NONDEFAULT
;
16602 return SEQ_NUMERIC
;
16605 if (ts
.kind
!= gfc_default_logical_kind
)
16606 return SEQ_NONDEFAULT
;
16608 return SEQ_NUMERIC
;
16611 return SEQ_NONDEFAULT
;
16616 /* Resolve derived type EQUIVALENCE object. */
16619 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16621 gfc_component
*c
= derived
->components
;
16626 /* Shall not be an object of nonsequence derived type. */
16627 if (!derived
->attr
.sequence
)
16629 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16630 "attribute to be an EQUIVALENCE object", sym
->name
,
16635 /* Shall not have allocatable components. */
16636 if (derived
->attr
.alloc_comp
)
16638 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16639 "components to be an EQUIVALENCE object",sym
->name
,
16644 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16646 gfc_error ("Derived type variable %qs at %L with default "
16647 "initialization cannot be in EQUIVALENCE with a variable "
16648 "in COMMON", sym
->name
, &e
->where
);
16652 for (; c
; c
= c
->next
)
16654 if (gfc_bt_struct (c
->ts
.type
)
16655 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16658 /* Shall not be an object of sequence derived type containing a pointer
16659 in the structure. */
16660 if (c
->attr
.pointer
)
16662 gfc_error ("Derived type variable %qs at %L with pointer "
16663 "component(s) cannot be an EQUIVALENCE object",
16664 sym
->name
, &e
->where
);
16672 /* Resolve equivalence object.
16673 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16674 an allocatable array, an object of nonsequence derived type, an object of
16675 sequence derived type containing a pointer at any level of component
16676 selection, an automatic object, a function name, an entry name, a result
16677 name, a named constant, a structure component, or a subobject of any of
16678 the preceding objects. A substring shall not have length zero. A
16679 derived type shall not have components with default initialization nor
16680 shall two objects of an equivalence group be initialized.
16681 Either all or none of the objects shall have an protected attribute.
16682 The simple constraints are done in symbol.c(check_conflict) and the rest
16683 are implemented here. */
16686 resolve_equivalence (gfc_equiv
*eq
)
16689 gfc_symbol
*first_sym
;
16692 locus
*last_where
= NULL
;
16693 seq_type eq_type
, last_eq_type
;
16694 gfc_typespec
*last_ts
;
16695 int object
, cnt_protected
;
16698 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16700 first_sym
= eq
->expr
->symtree
->n
.sym
;
16704 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16708 e
->ts
= e
->symtree
->n
.sym
->ts
;
16709 /* match_varspec might not know yet if it is seeing
16710 array reference or substring reference, as it doesn't
16712 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16714 gfc_ref
*ref
= e
->ref
;
16715 sym
= e
->symtree
->n
.sym
;
16717 if (sym
->attr
.dimension
)
16719 ref
->u
.ar
.as
= sym
->as
;
16723 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16724 if (e
->ts
.type
== BT_CHARACTER
16726 && ref
->type
== REF_ARRAY
16727 && ref
->u
.ar
.dimen
== 1
16728 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16729 && ref
->u
.ar
.stride
[0] == NULL
)
16731 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16732 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16735 /* Optimize away the (:) reference. */
16736 if (start
== NULL
&& end
== NULL
)
16739 e
->ref
= ref
->next
;
16741 e
->ref
->next
= ref
->next
;
16746 ref
->type
= REF_SUBSTRING
;
16748 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16750 ref
->u
.ss
.start
= start
;
16751 if (end
== NULL
&& e
->ts
.u
.cl
)
16752 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16753 ref
->u
.ss
.end
= end
;
16754 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16761 /* Any further ref is an error. */
16764 gcc_assert (ref
->type
== REF_ARRAY
);
16765 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16771 if (!gfc_resolve_expr (e
))
16774 sym
= e
->symtree
->n
.sym
;
16776 if (sym
->attr
.is_protected
)
16778 if (cnt_protected
> 0 && cnt_protected
!= object
)
16780 gfc_error ("Either all or none of the objects in the "
16781 "EQUIVALENCE set at %L shall have the "
16782 "PROTECTED attribute",
16787 /* Shall not equivalence common block variables in a PURE procedure. */
16788 if (sym
->ns
->proc_name
16789 && sym
->ns
->proc_name
->attr
.pure
16790 && sym
->attr
.in_common
)
16792 /* Need to check for symbols that may have entered the pure
16793 procedure via a USE statement. */
16794 bool saw_sym
= false;
16795 if (sym
->ns
->use_stmts
)
16798 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16799 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16805 gfc_error ("COMMON block member %qs at %L cannot be an "
16806 "EQUIVALENCE object in the pure procedure %qs",
16807 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16811 /* Shall not be a named constant. */
16812 if (e
->expr_type
== EXPR_CONSTANT
)
16814 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16815 "object", sym
->name
, &e
->where
);
16819 if (e
->ts
.type
== BT_DERIVED
16820 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16823 /* Check that the types correspond correctly:
16825 A numeric sequence structure may be equivalenced to another sequence
16826 structure, an object of default integer type, default real type, double
16827 precision real type, default logical type such that components of the
16828 structure ultimately only become associated to objects of the same
16829 kind. A character sequence structure may be equivalenced to an object
16830 of default character kind or another character sequence structure.
16831 Other objects may be equivalenced only to objects of the same type and
16832 kind parameters. */
16834 /* Identical types are unconditionally OK. */
16835 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16836 goto identical_types
;
16838 last_eq_type
= sequence_type (*last_ts
);
16839 eq_type
= sequence_type (sym
->ts
);
16841 /* Since the pair of objects is not of the same type, mixed or
16842 non-default sequences can be rejected. */
16844 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16845 "statement at %L with different type objects";
16847 && last_eq_type
== SEQ_MIXED
16848 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16849 || (eq_type
== SEQ_MIXED
16850 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16853 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16854 "statement at %L with objects of different type";
16856 && last_eq_type
== SEQ_NONDEFAULT
16857 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16858 || (eq_type
== SEQ_NONDEFAULT
16859 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16862 msg
="Non-CHARACTER object %qs in default CHARACTER "
16863 "EQUIVALENCE statement at %L";
16864 if (last_eq_type
== SEQ_CHARACTER
16865 && eq_type
!= SEQ_CHARACTER
16866 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16869 msg
="Non-NUMERIC object %qs in default NUMERIC "
16870 "EQUIVALENCE statement at %L";
16871 if (last_eq_type
== SEQ_NUMERIC
16872 && eq_type
!= SEQ_NUMERIC
16873 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16878 last_where
= &e
->where
;
16883 /* Shall not be an automatic array. */
16884 if (e
->ref
->type
== REF_ARRAY
16885 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16887 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16888 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16895 /* Shall not be a structure component. */
16896 if (r
->type
== REF_COMPONENT
)
16898 gfc_error ("Structure component %qs at %L cannot be an "
16899 "EQUIVALENCE object",
16900 r
->u
.c
.component
->name
, &e
->where
);
16904 /* A substring shall not have length zero. */
16905 if (r
->type
== REF_SUBSTRING
)
16907 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16909 gfc_error ("Substring at %L has length zero",
16910 &r
->u
.ss
.start
->where
);
16920 /* Function called by resolve_fntype to flag other symbols used in the
16921 length type parameter specification of function results. */
16924 flag_fn_result_spec (gfc_expr
*expr
,
16926 int *f ATTRIBUTE_UNUSED
)
16931 if (expr
->expr_type
== EXPR_VARIABLE
)
16933 s
= expr
->symtree
->n
.sym
;
16934 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16940 gfc_error ("Self reference in character length expression "
16941 "for %qs at %L", sym
->name
, &expr
->where
);
16945 if (!s
->fn_result_spec
16946 && s
->attr
.flavor
== FL_PARAMETER
)
16948 /* Function contained in a module.... */
16949 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16952 s
->fn_result_spec
= 1;
16953 /* Make sure that this symbol is translated as a module
16955 st
= gfc_get_unique_symtree (ns
);
16959 /* ... which is use associated and called. */
16960 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16962 /* External function matched with an interface. */
16965 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16966 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16967 && s
->ns
->proc_name
->attr
.function
))
16968 s
->fn_result_spec
= 1;
16975 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16978 resolve_fntype (gfc_namespace
*ns
)
16980 gfc_entry_list
*el
;
16983 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16986 /* If there are any entries, ns->proc_name is the entry master
16987 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16989 sym
= ns
->entries
->sym
;
16991 sym
= ns
->proc_name
;
16992 if (sym
->result
== sym
16993 && sym
->ts
.type
== BT_UNKNOWN
16994 && !gfc_set_default_type (sym
, 0, NULL
)
16995 && !sym
->attr
.untyped
)
16997 gfc_error ("Function %qs at %L has no IMPLICIT type",
16998 sym
->name
, &sym
->declared_at
);
16999 sym
->attr
.untyped
= 1;
17002 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
17003 && !sym
->attr
.contained
17004 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
17005 && gfc_check_symbol_access (sym
))
17007 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
17008 "%L of PRIVATE type %qs", sym
->name
,
17009 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
17013 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
17015 if (el
->sym
->result
== el
->sym
17016 && el
->sym
->ts
.type
== BT_UNKNOWN
17017 && !gfc_set_default_type (el
->sym
, 0, NULL
)
17018 && !el
->sym
->attr
.untyped
)
17020 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
17021 el
->sym
->name
, &el
->sym
->declared_at
);
17022 el
->sym
->attr
.untyped
= 1;
17026 if (sym
->ts
.type
== BT_CHARACTER
)
17027 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
17031 /* 12.3.2.1.1 Defined operators. */
17034 check_uop_procedure (gfc_symbol
*sym
, locus where
)
17036 gfc_formal_arglist
*formal
;
17038 if (!sym
->attr
.function
)
17040 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
17041 sym
->name
, &where
);
17045 if (sym
->ts
.type
== BT_CHARACTER
17046 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
17047 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
17048 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
17050 gfc_error ("User operator procedure %qs at %L cannot be assumed "
17051 "character length", sym
->name
, &where
);
17055 formal
= gfc_sym_get_dummy_args (sym
);
17056 if (!formal
|| !formal
->sym
)
17058 gfc_error ("User operator procedure %qs at %L must have at least "
17059 "one argument", sym
->name
, &where
);
17063 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17065 gfc_error ("First argument of operator interface at %L must be "
17066 "INTENT(IN)", &where
);
17070 if (formal
->sym
->attr
.optional
)
17072 gfc_error ("First argument of operator interface at %L cannot be "
17073 "optional", &where
);
17077 formal
= formal
->next
;
17078 if (!formal
|| !formal
->sym
)
17081 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
17083 gfc_error ("Second argument of operator interface at %L must be "
17084 "INTENT(IN)", &where
);
17088 if (formal
->sym
->attr
.optional
)
17090 gfc_error ("Second argument of operator interface at %L cannot be "
17091 "optional", &where
);
17097 gfc_error ("Operator interface at %L must have, at most, two "
17098 "arguments", &where
);
17106 gfc_resolve_uops (gfc_symtree
*symtree
)
17108 gfc_interface
*itr
;
17110 if (symtree
== NULL
)
17113 gfc_resolve_uops (symtree
->left
);
17114 gfc_resolve_uops (symtree
->right
);
17116 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
17117 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
17121 /* Examine all of the expressions associated with a program unit,
17122 assign types to all intermediate expressions, make sure that all
17123 assignments are to compatible types and figure out which names
17124 refer to which functions or subroutines. It doesn't check code
17125 block, which is handled by gfc_resolve_code. */
17128 resolve_types (gfc_namespace
*ns
)
17134 gfc_namespace
* old_ns
= gfc_current_ns
;
17135 bool recursive
= ns
->proc_name
&& ns
->proc_name
->attr
.recursive
;
17137 if (ns
->types_resolved
)
17140 /* Check that all IMPLICIT types are ok. */
17141 if (!ns
->seen_implicit_none
)
17144 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17145 if (ns
->set_flag
[letter
]
17146 && !resolve_typespec_used (&ns
->default_type
[letter
],
17147 &ns
->implicit_loc
[letter
], NULL
))
17151 gfc_current_ns
= ns
;
17153 resolve_entries (ns
);
17155 resolve_common_vars (&ns
->blank_common
, false);
17156 resolve_common_blocks (ns
->common_root
);
17158 resolve_contained_functions (ns
);
17160 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17161 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17162 resolve_formal_arglist (ns
->proc_name
);
17164 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17166 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17167 resolve_charlen (cl
);
17169 gfc_traverse_ns (ns
, resolve_symbol
);
17171 resolve_fntype (ns
);
17173 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17175 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17176 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17177 "also be PURE", n
->proc_name
->name
,
17178 &n
->proc_name
->declared_at
);
17184 gfc_do_concurrent_flag
= 0;
17185 gfc_check_interfaces (ns
);
17187 gfc_traverse_ns (ns
, resolve_values
);
17189 if (ns
->save_all
|| (!flag_automatic
&& !recursive
))
17193 for (d
= ns
->data
; d
; d
= d
->next
)
17197 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17199 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17201 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17202 resolve_equivalence (eq
);
17204 /* Warn about unused labels. */
17205 if (warn_unused_label
)
17206 warn_unused_fortran_label (ns
->st_labels
);
17208 gfc_resolve_uops (ns
->uop_root
);
17210 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17212 gfc_resolve_omp_declare_simd (ns
);
17214 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17216 ns
->types_resolved
= 1;
17218 gfc_current_ns
= old_ns
;
17222 /* Call gfc_resolve_code recursively. */
17225 resolve_codes (gfc_namespace
*ns
)
17228 bitmap_obstack old_obstack
;
17230 if (ns
->resolved
== 1)
17233 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17236 gfc_current_ns
= ns
;
17238 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17239 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17242 /* Set to an out of range value. */
17243 current_entry_id
= -1;
17245 old_obstack
= labels_obstack
;
17246 bitmap_obstack_initialize (&labels_obstack
);
17248 gfc_resolve_oacc_declare (ns
);
17249 gfc_resolve_oacc_routines (ns
);
17250 gfc_resolve_omp_local_vars (ns
);
17251 gfc_resolve_code (ns
->code
, ns
);
17253 bitmap_obstack_release (&labels_obstack
);
17254 labels_obstack
= old_obstack
;
17258 /* This function is called after a complete program unit has been compiled.
17259 Its purpose is to examine all of the expressions associated with a program
17260 unit, assign types to all intermediate expressions, make sure that all
17261 assignments are to compatible types and figure out which names refer to
17262 which functions or subroutines. */
17265 gfc_resolve (gfc_namespace
*ns
)
17267 gfc_namespace
*old_ns
;
17268 code_stack
*old_cs_base
;
17269 struct gfc_omp_saved_state old_omp_state
;
17275 old_ns
= gfc_current_ns
;
17276 old_cs_base
= cs_base
;
17278 /* As gfc_resolve can be called during resolution of an OpenMP construct
17279 body, we should clear any state associated to it, so that say NS's
17280 DO loops are not interpreted as OpenMP loops. */
17281 if (!ns
->construct_entities
)
17282 gfc_omp_save_and_clear_state (&old_omp_state
);
17284 resolve_types (ns
);
17285 component_assignment_level
= 0;
17286 resolve_codes (ns
);
17288 gfc_current_ns
= old_ns
;
17289 cs_base
= old_cs_base
;
17292 gfc_run_passes (ns
);
17294 if (!ns
->construct_entities
)
17295 gfc_omp_restore_state (&old_omp_state
);