1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
28 #include "arith.h" /* For gfc_compare_expr(). */
29 #include "dependency.h"
31 #include "target-memory.h" /* for gfc_simplify_transfer */
32 #include "constructor.h"
34 /* Types used in equivalence statements. */
38 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
42 /* Stack to keep track of the nesting of blocks as we move through the
43 code. See resolve_branch() and resolve_code(). */
45 typedef struct code_stack
47 struct gfc_code
*head
, *current
;
48 struct code_stack
*prev
;
50 /* This bitmap keeps track of the targets valid for a branch from
51 inside this block except for END {IF|SELECT}s of enclosing
53 bitmap reachable_labels
;
57 static code_stack
*cs_base
= NULL
;
60 /* Nonzero if we're inside a FORALL block. */
62 static int forall_flag
;
64 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
66 static int omp_workshare_flag
;
68 /* Nonzero if we are processing a formal arglist. The corresponding function
69 resets the flag each time that it is read. */
70 static int formal_arg_flag
= 0;
72 /* True if we are resolving a specification expression. */
73 static int specification_expr
= 0;
75 /* The id of the last entry seen. */
76 static int current_entry_id
;
78 /* We use bitmaps to determine if a branch target is valid. */
79 static bitmap_obstack labels_obstack
;
81 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
82 static bool inquiry_argument
= false;
85 gfc_is_formal_arg (void)
87 return formal_arg_flag
;
90 /* Is the symbol host associated? */
92 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
94 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
103 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
104 an ABSTRACT derived-type. If where is not NULL, an error message with that
105 locus is printed, optionally using name. */
108 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
110 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
115 gfc_error ("'%s' at %L is of the ABSTRACT type '%s'",
116 name
, where
, ts
->u
.derived
->name
);
118 gfc_error ("ABSTRACT type '%s' used at %L",
119 ts
->u
.derived
->name
, where
);
129 /* Resolve types of formal argument lists. These have to be done early so that
130 the formal argument lists of module procedures can be copied to the
131 containing module before the individual procedures are resolved
132 individually. We also resolve argument lists of procedures in interface
133 blocks because they are self-contained scoping units.
135 Since a dummy argument cannot be a non-dummy procedure, the only
136 resort left for untyped names are the IMPLICIT types. */
139 resolve_formal_arglist (gfc_symbol
*proc
)
141 gfc_formal_arglist
*f
;
145 if (proc
->result
!= NULL
)
150 if (gfc_elemental (proc
)
151 || sym
->attr
.pointer
|| sym
->attr
.allocatable
152 || (sym
->as
&& sym
->as
->rank
> 0))
154 proc
->attr
.always_explicit
= 1;
155 sym
->attr
.always_explicit
= 1;
160 for (f
= proc
->formal
; f
; f
= f
->next
)
166 /* Alternate return placeholder. */
167 if (gfc_elemental (proc
))
168 gfc_error ("Alternate return specifier in elemental subroutine "
169 "'%s' at %L is not allowed", proc
->name
,
171 if (proc
->attr
.function
)
172 gfc_error ("Alternate return specifier in function "
173 "'%s' at %L is not allowed", proc
->name
,
178 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
179 resolve_formal_arglist (sym
);
181 if (sym
->attr
.subroutine
|| sym
->attr
.external
|| sym
->attr
.intrinsic
)
183 if (gfc_pure (proc
) && !gfc_pure (sym
))
185 gfc_error ("Dummy procedure '%s' of PURE procedure at %L must "
186 "also be PURE", sym
->name
, &sym
->declared_at
);
190 if (gfc_elemental (proc
))
192 gfc_error ("Dummy procedure at %L not allowed in ELEMENTAL "
193 "procedure", &sym
->declared_at
);
197 if (sym
->attr
.function
198 && sym
->ts
.type
== BT_UNKNOWN
199 && sym
->attr
.intrinsic
)
201 gfc_intrinsic_sym
*isym
;
202 isym
= gfc_find_function (sym
->name
);
203 if (isym
== NULL
|| !isym
->specific
)
205 gfc_error ("Unable to find a specific INTRINSIC procedure "
206 "for the reference '%s' at %L", sym
->name
,
215 if (sym
->ts
.type
== BT_UNKNOWN
)
217 if (!sym
->attr
.function
|| sym
->result
== sym
)
218 gfc_set_default_type (sym
, 1, sym
->ns
);
221 gfc_resolve_array_spec (sym
->as
, 0);
223 /* We can't tell if an array with dimension (:) is assumed or deferred
224 shape until we know if it has the pointer or allocatable attributes.
226 if (sym
->as
&& sym
->as
->rank
> 0 && sym
->as
->type
== AS_DEFERRED
227 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
229 sym
->as
->type
= AS_ASSUMED_SHAPE
;
230 for (i
= 0; i
< sym
->as
->rank
; i
++)
231 sym
->as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
,
235 if ((sym
->as
&& sym
->as
->rank
> 0 && sym
->as
->type
== AS_ASSUMED_SHAPE
)
236 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
237 || sym
->attr
.optional
)
239 proc
->attr
.always_explicit
= 1;
241 proc
->result
->attr
.always_explicit
= 1;
244 /* If the flavor is unknown at this point, it has to be a variable.
245 A procedure specification would have already set the type. */
247 if (sym
->attr
.flavor
== FL_UNKNOWN
)
248 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
250 if (gfc_pure (proc
) && !sym
->attr
.pointer
251 && sym
->attr
.flavor
!= FL_PROCEDURE
)
253 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
254 gfc_error ("Argument '%s' of pure function '%s' at %L must be "
255 "INTENT(IN)", sym
->name
, proc
->name
,
258 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
259 gfc_error ("Argument '%s' of pure subroutine '%s' at %L must "
260 "have its INTENT specified", sym
->name
, proc
->name
,
264 if (gfc_elemental (proc
))
267 if (sym
->attr
.codimension
)
269 gfc_error ("Coarray dummy argument '%s' at %L to elemental "
270 "procedure", sym
->name
, &sym
->declared_at
);
276 gfc_error ("Argument '%s' of elemental procedure at %L must "
277 "be scalar", sym
->name
, &sym
->declared_at
);
281 if (sym
->attr
.pointer
)
283 gfc_error ("Argument '%s' of elemental procedure at %L cannot "
284 "have the POINTER attribute", sym
->name
,
289 if (sym
->attr
.flavor
== FL_PROCEDURE
)
291 gfc_error ("Dummy procedure '%s' not allowed in elemental "
292 "procedure '%s' at %L", sym
->name
, proc
->name
,
298 /* Each dummy shall be specified to be scalar. */
299 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
303 gfc_error ("Argument '%s' of statement function at %L must "
304 "be scalar", sym
->name
, &sym
->declared_at
);
308 if (sym
->ts
.type
== BT_CHARACTER
)
310 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
311 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
313 gfc_error ("Character-valued argument '%s' of statement "
314 "function at %L must have constant length",
315 sym
->name
, &sym
->declared_at
);
325 /* Work function called when searching for symbols that have argument lists
326 associated with them. */
329 find_arglists (gfc_symbol
*sym
)
331 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
)
334 resolve_formal_arglist (sym
);
338 /* Given a namespace, resolve all formal argument lists within the namespace.
342 resolve_formal_arglists (gfc_namespace
*ns
)
347 gfc_traverse_ns (ns
, find_arglists
);
352 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
356 /* If this namespace is not a function or an entry master function,
358 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
359 || sym
->attr
.entry_master
)
362 /* Try to find out of what the return type is. */
363 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
365 t
= gfc_set_default_type (sym
->result
, 0, ns
);
367 if (t
== FAILURE
&& !sym
->result
->attr
.untyped
)
369 if (sym
->result
== sym
)
370 gfc_error ("Contained function '%s' at %L has no IMPLICIT type",
371 sym
->name
, &sym
->declared_at
);
372 else if (!sym
->result
->attr
.proc_pointer
)
373 gfc_error ("Result '%s' of contained function '%s' at %L has "
374 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
375 &sym
->result
->declared_at
);
376 sym
->result
->attr
.untyped
= 1;
380 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
381 type, lists the only ways a character length value of * can be used:
382 dummy arguments of procedures, named constants, and function results
383 in external functions. Internal function results and results of module
384 procedures are not on this list, ergo, not permitted. */
386 if (sym
->result
->ts
.type
== BT_CHARACTER
)
388 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
389 if (!cl
|| !cl
->length
)
391 /* See if this is a module-procedure and adapt error message
394 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
395 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
397 gfc_error ("Character-valued %s '%s' at %L must not be"
399 module_proc
? _("module procedure")
400 : _("internal function"),
401 sym
->name
, &sym
->declared_at
);
407 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
408 introduce duplicates. */
411 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
413 gfc_formal_arglist
*f
, *new_arglist
;
416 for (; new_args
!= NULL
; new_args
= new_args
->next
)
418 new_sym
= new_args
->sym
;
419 /* See if this arg is already in the formal argument list. */
420 for (f
= proc
->formal
; f
; f
= f
->next
)
422 if (new_sym
== f
->sym
)
429 /* Add a new argument. Argument order is not important. */
430 new_arglist
= gfc_get_formal_arglist ();
431 new_arglist
->sym
= new_sym
;
432 new_arglist
->next
= proc
->formal
;
433 proc
->formal
= new_arglist
;
438 /* Flag the arguments that are not present in all entries. */
441 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
443 gfc_formal_arglist
*f
, *head
;
446 for (f
= proc
->formal
; f
; f
= f
->next
)
451 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
453 if (new_args
->sym
== f
->sym
)
460 f
->sym
->attr
.not_always_present
= 1;
465 /* Resolve alternate entry points. If a symbol has multiple entry points we
466 create a new master symbol for the main routine, and turn the existing
467 symbol into an entry point. */
470 resolve_entries (gfc_namespace
*ns
)
472 gfc_namespace
*old_ns
;
476 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
477 static int master_count
= 0;
479 if (ns
->proc_name
== NULL
)
482 /* No need to do anything if this procedure doesn't have alternate entry
487 /* We may already have resolved alternate entry points. */
488 if (ns
->proc_name
->attr
.entry_master
)
491 /* If this isn't a procedure something has gone horribly wrong. */
492 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
494 /* Remember the current namespace. */
495 old_ns
= gfc_current_ns
;
499 /* Add the main entry point to the list of entry points. */
500 el
= gfc_get_entry_list ();
501 el
->sym
= ns
->proc_name
;
503 el
->next
= ns
->entries
;
505 ns
->proc_name
->attr
.entry
= 1;
507 /* If it is a module function, it needs to be in the right namespace
508 so that gfc_get_fake_result_decl can gather up the results. The
509 need for this arose in get_proc_name, where these beasts were
510 left in their own namespace, to keep prior references linked to
511 the entry declaration.*/
512 if (ns
->proc_name
->attr
.function
513 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
516 /* Do the same for entries where the master is not a module
517 procedure. These are retained in the module namespace because
518 of the module procedure declaration. */
519 for (el
= el
->next
; el
; el
= el
->next
)
520 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
521 && el
->sym
->attr
.mod_proc
)
525 /* Add an entry statement for it. */
532 /* Create a new symbol for the master function. */
533 /* Give the internal function a unique name (within this file).
534 Also include the function name so the user has some hope of figuring
535 out what is going on. */
536 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
537 master_count
++, ns
->proc_name
->name
);
538 gfc_get_ha_symbol (name
, &proc
);
539 gcc_assert (proc
!= NULL
);
541 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
542 if (ns
->proc_name
->attr
.subroutine
)
543 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
547 gfc_typespec
*ts
, *fts
;
548 gfc_array_spec
*as
, *fas
;
549 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
551 fas
= ns
->entries
->sym
->as
;
552 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
553 fts
= &ns
->entries
->sym
->result
->ts
;
554 if (fts
->type
== BT_UNKNOWN
)
555 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
556 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
558 ts
= &el
->sym
->result
->ts
;
560 as
= as
? as
: el
->sym
->result
->as
;
561 if (ts
->type
== BT_UNKNOWN
)
562 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
564 if (! gfc_compare_types (ts
, fts
)
565 || (el
->sym
->result
->attr
.dimension
566 != ns
->entries
->sym
->result
->attr
.dimension
)
567 || (el
->sym
->result
->attr
.pointer
568 != ns
->entries
->sym
->result
->attr
.pointer
))
570 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
571 && gfc_compare_array_spec (as
, fas
) == 0)
572 gfc_error ("Function %s at %L has entries with mismatched "
573 "array specifications", ns
->entries
->sym
->name
,
574 &ns
->entries
->sym
->declared_at
);
575 /* The characteristics need to match and thus both need to have
576 the same string length, i.e. both len=*, or both len=4.
577 Having both len=<variable> is also possible, but difficult to
578 check at compile time. */
579 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
580 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
581 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
583 && ts
->u
.cl
->length
->expr_type
584 != fts
->u
.cl
->length
->expr_type
)
586 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
587 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
588 fts
->u
.cl
->length
->value
.integer
) != 0)))
589 gfc_notify_std (GFC_STD_GNU
, "Extension: Function %s at %L with "
590 "entries returning variables of different "
591 "string lengths", ns
->entries
->sym
->name
,
592 &ns
->entries
->sym
->declared_at
);
597 sym
= ns
->entries
->sym
->result
;
598 /* All result types the same. */
600 if (sym
->attr
.dimension
)
601 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
602 if (sym
->attr
.pointer
)
603 gfc_add_pointer (&proc
->attr
, NULL
);
607 /* Otherwise the result will be passed through a union by
609 proc
->attr
.mixed_entry_master
= 1;
610 for (el
= ns
->entries
; el
; el
= el
->next
)
612 sym
= el
->sym
->result
;
613 if (sym
->attr
.dimension
)
615 if (el
== ns
->entries
)
616 gfc_error ("FUNCTION result %s can't be an array in "
617 "FUNCTION %s at %L", sym
->name
,
618 ns
->entries
->sym
->name
, &sym
->declared_at
);
620 gfc_error ("ENTRY result %s can't be an array in "
621 "FUNCTION %s at %L", sym
->name
,
622 ns
->entries
->sym
->name
, &sym
->declared_at
);
624 else if (sym
->attr
.pointer
)
626 if (el
== ns
->entries
)
627 gfc_error ("FUNCTION result %s can't be a POINTER in "
628 "FUNCTION %s at %L", sym
->name
,
629 ns
->entries
->sym
->name
, &sym
->declared_at
);
631 gfc_error ("ENTRY result %s can't be a POINTER in "
632 "FUNCTION %s at %L", sym
->name
,
633 ns
->entries
->sym
->name
, &sym
->declared_at
);
638 if (ts
->type
== BT_UNKNOWN
)
639 ts
= gfc_get_default_type (sym
->name
, NULL
);
643 if (ts
->kind
== gfc_default_integer_kind
)
647 if (ts
->kind
== gfc_default_real_kind
648 || ts
->kind
== gfc_default_double_kind
)
652 if (ts
->kind
== gfc_default_complex_kind
)
656 if (ts
->kind
== gfc_default_logical_kind
)
660 /* We will issue error elsewhere. */
668 if (el
== ns
->entries
)
669 gfc_error ("FUNCTION result %s can't be of type %s "
670 "in FUNCTION %s at %L", sym
->name
,
671 gfc_typename (ts
), ns
->entries
->sym
->name
,
674 gfc_error ("ENTRY result %s can't be of type %s "
675 "in FUNCTION %s at %L", sym
->name
,
676 gfc_typename (ts
), ns
->entries
->sym
->name
,
683 proc
->attr
.access
= ACCESS_PRIVATE
;
684 proc
->attr
.entry_master
= 1;
686 /* Merge all the entry point arguments. */
687 for (el
= ns
->entries
; el
; el
= el
->next
)
688 merge_argument_lists (proc
, el
->sym
->formal
);
690 /* Check the master formal arguments for any that are not
691 present in all entry points. */
692 for (el
= ns
->entries
; el
; el
= el
->next
)
693 check_argument_lists (proc
, el
->sym
->formal
);
695 /* Use the master function for the function body. */
696 ns
->proc_name
= proc
;
698 /* Finalize the new symbols. */
699 gfc_commit_symbols ();
701 /* Restore the original namespace. */
702 gfc_current_ns
= old_ns
;
707 has_default_initializer (gfc_symbol
*der
)
711 gcc_assert (der
->attr
.flavor
== FL_DERIVED
);
712 for (c
= der
->components
; c
; c
= c
->next
)
713 if ((c
->ts
.type
!= BT_DERIVED
&& c
->initializer
)
714 || (c
->ts
.type
== BT_DERIVED
715 && (!c
->attr
.pointer
&& has_default_initializer (c
->ts
.u
.derived
))))
721 /* Resolve common variables. */
723 resolve_common_vars (gfc_symbol
*sym
, bool named_common
)
725 gfc_symbol
*csym
= sym
;
727 for (; csym
; csym
= csym
->common_next
)
729 if (csym
->value
|| csym
->attr
.data
)
731 if (!csym
->ns
->is_block_data
)
732 gfc_notify_std (GFC_STD_GNU
, "Variable '%s' at %L is in COMMON "
733 "but only in BLOCK DATA initialization is "
734 "allowed", csym
->name
, &csym
->declared_at
);
735 else if (!named_common
)
736 gfc_notify_std (GFC_STD_GNU
, "Initialized variable '%s' at %L is "
737 "in a blank COMMON but initialization is only "
738 "allowed in named common blocks", csym
->name
,
742 if (csym
->ts
.type
!= BT_DERIVED
)
745 if (!(csym
->ts
.u
.derived
->attr
.sequence
746 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
747 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
748 "has neither the SEQUENCE nor the BIND(C) "
749 "attribute", csym
->name
, &csym
->declared_at
);
750 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
751 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
752 "has an ultimate component that is "
753 "allocatable", csym
->name
, &csym
->declared_at
);
754 if (has_default_initializer (csym
->ts
.u
.derived
))
755 gfc_error_now ("Derived type variable '%s' in COMMON at %L "
756 "may not have default initializer", csym
->name
,
759 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
760 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
764 /* Resolve common blocks. */
766 resolve_common_blocks (gfc_symtree
*common_root
)
770 if (common_root
== NULL
)
773 if (common_root
->left
)
774 resolve_common_blocks (common_root
->left
);
775 if (common_root
->right
)
776 resolve_common_blocks (common_root
->right
);
778 resolve_common_vars (common_root
->n
.common
->head
, true);
780 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
784 if (sym
->attr
.flavor
== FL_PARAMETER
)
785 gfc_error ("COMMON block '%s' at %L is used as PARAMETER at %L",
786 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
788 if (sym
->attr
.intrinsic
)
789 gfc_error ("COMMON block '%s' at %L is also an intrinsic procedure",
790 sym
->name
, &common_root
->n
.common
->where
);
791 else if (sym
->attr
.result
792 || gfc_is_function_return_value (sym
, gfc_current_ns
))
793 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: COMMON block '%s' at %L "
794 "that is also a function result", sym
->name
,
795 &common_root
->n
.common
->where
);
796 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
797 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
798 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: COMMON block '%s' at %L "
799 "that is also a global procedure", sym
->name
,
800 &common_root
->n
.common
->where
);
804 /* Resolve contained function types. Because contained functions can call one
805 another, they have to be worked out before any of the contained procedures
808 The good news is that if a function doesn't already have a type, the only
809 way it can get one is through an IMPLICIT type or a RESULT variable, because
810 by definition contained functions are contained namespace they're contained
811 in, not in a sibling or parent namespace. */
814 resolve_contained_functions (gfc_namespace
*ns
)
816 gfc_namespace
*child
;
819 resolve_formal_arglists (ns
);
821 for (child
= ns
->contained
; child
; child
= child
->sibling
)
823 /* Resolve alternate entry points first. */
824 resolve_entries (child
);
826 /* Then check function return types. */
827 resolve_contained_fntype (child
->proc_name
, child
);
828 for (el
= child
->entries
; el
; el
= el
->next
)
829 resolve_contained_fntype (el
->sym
, child
);
834 /* Resolve all of the elements of a structure constructor and make sure that
835 the types are correct. */
838 resolve_structure_cons (gfc_expr
*expr
)
840 gfc_constructor
*cons
;
846 cons
= gfc_constructor_first (expr
->value
.constructor
);
847 /* A constructor may have references if it is the result of substituting a
848 parameter variable. In this case we just pull out the component we
851 comp
= expr
->ref
->u
.c
.sym
->components
;
853 comp
= expr
->ts
.u
.derived
->components
;
855 /* See if the user is trying to invoke a structure constructor for one of
856 the iso_c_binding derived types. */
857 if (expr
->ts
.type
== BT_DERIVED
&& expr
->ts
.u
.derived
858 && expr
->ts
.u
.derived
->ts
.is_iso_c
&& cons
859 && (cons
->expr
== NULL
|| cons
->expr
->expr_type
!= EXPR_NULL
))
861 gfc_error ("Components of structure constructor '%s' at %L are PRIVATE",
862 expr
->ts
.u
.derived
->name
, &(expr
->where
));
866 /* Return if structure constructor is c_null_(fun)prt. */
867 if (expr
->ts
.type
== BT_DERIVED
&& expr
->ts
.u
.derived
868 && expr
->ts
.u
.derived
->ts
.is_iso_c
&& cons
869 && cons
->expr
&& cons
->expr
->expr_type
== EXPR_NULL
)
872 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
879 if (gfc_resolve_expr (cons
->expr
) == FAILURE
)
885 rank
= comp
->as
? comp
->as
->rank
: 0;
886 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
887 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
889 gfc_error ("The rank of the element in the derived type "
890 "constructor at %L does not match that of the "
891 "component (%d/%d)", &cons
->expr
->where
,
892 cons
->expr
->rank
, rank
);
896 /* If we don't have the right type, try to convert it. */
898 if (!gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
901 if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
902 gfc_error ("The element in the derived type constructor at %L, "
903 "for pointer component '%s', is %s but should be %s",
904 &cons
->expr
->where
, comp
->name
,
905 gfc_basic_typename (cons
->expr
->ts
.type
),
906 gfc_basic_typename (comp
->ts
.type
));
908 t
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
911 if (cons
->expr
->expr_type
== EXPR_NULL
912 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
913 || comp
->attr
.proc_pointer
914 || (comp
->ts
.type
== BT_CLASS
915 && (comp
->ts
.u
.derived
->components
->attr
.pointer
916 || comp
->ts
.u
.derived
->components
->attr
.allocatable
))))
919 gfc_error ("The NULL in the derived type constructor at %L is "
920 "being applied to component '%s', which is neither "
921 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
925 if (!comp
->attr
.pointer
|| cons
->expr
->expr_type
== EXPR_NULL
)
928 a
= gfc_expr_attr (cons
->expr
);
930 if (!a
.pointer
&& !a
.target
)
933 gfc_error ("The element in the derived type constructor at %L, "
934 "for pointer component '%s' should be a POINTER or "
935 "a TARGET", &cons
->expr
->where
, comp
->name
);
938 /* F2003, C1272 (3). */
939 if (gfc_pure (NULL
) && cons
->expr
->expr_type
== EXPR_VARIABLE
940 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
941 || gfc_is_coindexed (cons
->expr
)))
944 gfc_error ("Invalid expression in the derived type constructor for "
945 "pointer component '%s' at %L in PURE procedure",
946 comp
->name
, &cons
->expr
->where
);
954 /****************** Expression name resolution ******************/
956 /* Returns 0 if a symbol was not declared with a type or
957 attribute declaration statement, nonzero otherwise. */
960 was_declared (gfc_symbol
*sym
)
966 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
969 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
970 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
971 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
972 || a
.asynchronous
|| a
.codimension
)
979 /* Determine if a symbol is generic or not. */
982 generic_sym (gfc_symbol
*sym
)
986 if (sym
->attr
.generic
||
987 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
990 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
993 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1000 return generic_sym (s
);
1007 /* Determine if a symbol is specific or not. */
1010 specific_sym (gfc_symbol
*sym
)
1014 if (sym
->attr
.if_source
== IFSRC_IFBODY
1015 || sym
->attr
.proc
== PROC_MODULE
1016 || sym
->attr
.proc
== PROC_INTERNAL
1017 || sym
->attr
.proc
== PROC_ST_FUNCTION
1018 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1019 || sym
->attr
.external
)
1022 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1025 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1027 return (s
== NULL
) ? 0 : specific_sym (s
);
1031 /* Figure out if the procedure is specific, generic or unknown. */
1034 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
}
1038 procedure_kind (gfc_symbol
*sym
)
1040 if (generic_sym (sym
))
1041 return PTYPE_GENERIC
;
1043 if (specific_sym (sym
))
1044 return PTYPE_SPECIFIC
;
1046 return PTYPE_UNKNOWN
;
1049 /* Check references to assumed size arrays. The flag need_full_assumed_size
1050 is nonzero when matching actual arguments. */
1052 static int need_full_assumed_size
= 0;
1055 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1057 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1060 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1061 What should it be? */
1062 if ((e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1063 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1064 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1066 gfc_error ("The upper bound in the last dimension must "
1067 "appear in the reference to the assumed size "
1068 "array '%s' at %L", sym
->name
, &e
->where
);
1075 /* Look for bad assumed size array references in argument expressions
1076 of elemental and array valued intrinsic procedures. Since this is
1077 called from procedure resolution functions, it only recurses at
1081 resolve_assumed_size_actual (gfc_expr
*e
)
1086 switch (e
->expr_type
)
1089 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1094 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1095 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1106 /* Check a generic procedure, passed as an actual argument, to see if
1107 there is a matching specific name. If none, it is an error, and if
1108 more than one, the reference is ambiguous. */
1110 count_specific_procs (gfc_expr
*e
)
1117 sym
= e
->symtree
->n
.sym
;
1119 for (p
= sym
->generic
; p
; p
= p
->next
)
1120 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1122 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1128 gfc_error ("'%s' at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1132 gfc_error ("GENERIC procedure '%s' is not allowed as an actual "
1133 "argument at %L", sym
->name
, &e
->where
);
1139 /* See if a call to sym could possibly be a not allowed RECURSION because of
1140 a missing RECURIVE declaration. This means that either sym is the current
1141 context itself, or sym is the parent of a contained procedure calling its
1142 non-RECURSIVE containing procedure.
1143 This also works if sym is an ENTRY. */
1146 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1148 gfc_symbol
* proc_sym
;
1149 gfc_symbol
* context_proc
;
1150 gfc_namespace
* real_context
;
1152 if (sym
->attr
.flavor
== FL_PROGRAM
)
1155 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1157 /* If we've got an ENTRY, find real procedure. */
1158 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1159 proc_sym
= sym
->ns
->entries
->sym
;
1163 /* If sym is RECURSIVE, all is well of course. */
1164 if (proc_sym
->attr
.recursive
|| gfc_option
.flag_recursive
)
1167 /* Find the context procedure's "real" symbol if it has entries.
1168 We look for a procedure symbol, so recurse on the parents if we don't
1169 find one (like in case of a BLOCK construct). */
1170 for (real_context
= context
; ; real_context
= real_context
->parent
)
1172 /* We should find something, eventually! */
1173 gcc_assert (real_context
);
1175 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1176 : real_context
->proc_name
);
1178 /* In some special cases, there may not be a proc_name, like for this
1180 real(bad_kind()) function foo () ...
1181 when checking the call to bad_kind ().
1182 In these cases, we simply return here and assume that the
1187 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1191 /* A call from sym's body to itself is recursion, of course. */
1192 if (context_proc
== proc_sym
)
1195 /* The same is true if context is a contained procedure and sym the
1197 if (context_proc
->attr
.contained
)
1199 gfc_symbol
* parent_proc
;
1201 gcc_assert (context
->parent
);
1202 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1203 : context
->parent
->proc_name
);
1205 if (parent_proc
== proc_sym
)
1213 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1214 its typespec and formal argument list. */
1217 resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1219 gfc_intrinsic_sym
* isym
;
1225 /* We already know this one is an intrinsic, so we don't call
1226 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1227 gfc_find_subroutine directly to check whether it is a function or
1230 if ((isym
= gfc_find_function (sym
->name
)))
1232 if (sym
->ts
.type
!= BT_UNKNOWN
&& gfc_option
.warn_surprising
1233 && !sym
->attr
.implicit_type
)
1234 gfc_warning ("Type specified for intrinsic function '%s' at %L is"
1235 " ignored", sym
->name
, &sym
->declared_at
);
1237 if (!sym
->attr
.function
&&
1238 gfc_add_function (&sym
->attr
, sym
->name
, loc
) == FAILURE
)
1243 else if ((isym
= gfc_find_subroutine (sym
->name
)))
1245 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1247 gfc_error ("Intrinsic subroutine '%s' at %L shall not have a type"
1248 " specifier", sym
->name
, &sym
->declared_at
);
1252 if (!sym
->attr
.subroutine
&&
1253 gfc_add_subroutine (&sym
->attr
, sym
->name
, loc
) == FAILURE
)
1258 gfc_error ("'%s' declared INTRINSIC at %L does not exist", sym
->name
,
1263 gfc_copy_formal_args_intr (sym
, isym
);
1265 /* Check it is actually available in the standard settings. */
1266 if (gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
)
1269 gfc_error ("The intrinsic '%s' declared INTRINSIC at %L is not"
1270 " available in the current standard settings but %s. Use"
1271 " an appropriate -std=* option or enable -fall-intrinsics"
1272 " in order to use it.",
1273 sym
->name
, &sym
->declared_at
, symstd
);
1281 /* Resolve a procedure expression, like passing it to a called procedure or as
1282 RHS for a procedure pointer assignment. */
1285 resolve_procedure_expression (gfc_expr
* expr
)
1289 if (expr
->expr_type
!= EXPR_VARIABLE
)
1291 gcc_assert (expr
->symtree
);
1293 sym
= expr
->symtree
->n
.sym
;
1295 if (sym
->attr
.intrinsic
)
1296 resolve_intrinsic (sym
, &expr
->where
);
1298 if (sym
->attr
.flavor
!= FL_PROCEDURE
1299 || (sym
->attr
.function
&& sym
->result
== sym
))
1302 /* A non-RECURSIVE procedure that is used as procedure expression within its
1303 own body is in danger of being called recursively. */
1304 if (is_illegal_recursion (sym
, gfc_current_ns
))
1305 gfc_warning ("Non-RECURSIVE procedure '%s' at %L is possibly calling"
1306 " itself recursively. Declare it RECURSIVE or use"
1307 " -frecursive", sym
->name
, &expr
->where
);
1313 /* Resolve an actual argument list. Most of the time, this is just
1314 resolving the expressions in the list.
1315 The exception is that we sometimes have to decide whether arguments
1316 that look like procedure arguments are really simple variable
1320 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1321 bool no_formal_args
)
1324 gfc_symtree
*parent_st
;
1326 int save_need_full_assumed_size
;
1327 gfc_component
*comp
;
1329 for (; arg
; arg
= arg
->next
)
1334 /* Check the label is a valid branching target. */
1337 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1339 gfc_error ("Label %d referenced at %L is never defined",
1340 arg
->label
->value
, &arg
->label
->where
);
1347 if (gfc_is_proc_ptr_comp (e
, &comp
))
1350 if (e
->expr_type
== EXPR_PPC
)
1352 if (comp
->as
!= NULL
)
1353 e
->rank
= comp
->as
->rank
;
1354 e
->expr_type
= EXPR_FUNCTION
;
1356 if (gfc_resolve_expr (e
) == FAILURE
)
1361 if (e
->expr_type
== EXPR_VARIABLE
1362 && e
->symtree
->n
.sym
->attr
.generic
1364 && count_specific_procs (e
) != 1)
1367 if (e
->ts
.type
!= BT_PROCEDURE
)
1369 save_need_full_assumed_size
= need_full_assumed_size
;
1370 if (e
->expr_type
!= EXPR_VARIABLE
)
1371 need_full_assumed_size
= 0;
1372 if (gfc_resolve_expr (e
) != SUCCESS
)
1374 need_full_assumed_size
= save_need_full_assumed_size
;
1378 /* See if the expression node should really be a variable reference. */
1380 sym
= e
->symtree
->n
.sym
;
1382 if (sym
->attr
.flavor
== FL_PROCEDURE
1383 || sym
->attr
.intrinsic
1384 || sym
->attr
.external
)
1388 /* If a procedure is not already determined to be something else
1389 check if it is intrinsic. */
1390 if (!sym
->attr
.intrinsic
1391 && !(sym
->attr
.external
|| sym
->attr
.use_assoc
1392 || sym
->attr
.if_source
== IFSRC_IFBODY
)
1393 && gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1394 sym
->attr
.intrinsic
= 1;
1396 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1398 gfc_error ("Statement function '%s' at %L is not allowed as an "
1399 "actual argument", sym
->name
, &e
->where
);
1402 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1403 sym
->attr
.subroutine
);
1404 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1406 gfc_error ("Intrinsic '%s' at %L is not allowed as an "
1407 "actual argument", sym
->name
, &e
->where
);
1410 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1411 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1413 gfc_error ("Internal procedure '%s' is not allowed as an "
1414 "actual argument at %L", sym
->name
, &e
->where
);
1417 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1419 gfc_error ("ELEMENTAL non-INTRINSIC procedure '%s' is not "
1420 "allowed as an actual argument at %L", sym
->name
,
1424 /* Check if a generic interface has a specific procedure
1425 with the same name before emitting an error. */
1426 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1429 /* Just in case a specific was found for the expression. */
1430 sym
= e
->symtree
->n
.sym
;
1432 /* If the symbol is the function that names the current (or
1433 parent) scope, then we really have a variable reference. */
1435 if (gfc_is_function_return_value (sym
, sym
->ns
))
1438 /* If all else fails, see if we have a specific intrinsic. */
1439 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1441 gfc_intrinsic_sym
*isym
;
1443 isym
= gfc_find_function (sym
->name
);
1444 if (isym
== NULL
|| !isym
->specific
)
1446 gfc_error ("Unable to find a specific INTRINSIC procedure "
1447 "for the reference '%s' at %L", sym
->name
,
1452 sym
->attr
.intrinsic
= 1;
1453 sym
->attr
.function
= 1;
1456 if (gfc_resolve_expr (e
) == FAILURE
)
1461 /* See if the name is a module procedure in a parent unit. */
1463 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1466 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
1468 gfc_error ("Symbol '%s' at %L is ambiguous", sym
->name
, &e
->where
);
1472 if (parent_st
== NULL
)
1475 sym
= parent_st
->n
.sym
;
1476 e
->symtree
= parent_st
; /* Point to the right thing. */
1478 if (sym
->attr
.flavor
== FL_PROCEDURE
1479 || sym
->attr
.intrinsic
1480 || sym
->attr
.external
)
1482 if (gfc_resolve_expr (e
) == FAILURE
)
1488 e
->expr_type
= EXPR_VARIABLE
;
1490 if (sym
->as
!= NULL
)
1492 e
->rank
= sym
->as
->rank
;
1493 e
->ref
= gfc_get_ref ();
1494 e
->ref
->type
= REF_ARRAY
;
1495 e
->ref
->u
.ar
.type
= AR_FULL
;
1496 e
->ref
->u
.ar
.as
= sym
->as
;
1499 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
1500 primary.c (match_actual_arg). If above code determines that it
1501 is a variable instead, it needs to be resolved as it was not
1502 done at the beginning of this function. */
1503 save_need_full_assumed_size
= need_full_assumed_size
;
1504 if (e
->expr_type
!= EXPR_VARIABLE
)
1505 need_full_assumed_size
= 0;
1506 if (gfc_resolve_expr (e
) != SUCCESS
)
1508 need_full_assumed_size
= save_need_full_assumed_size
;
1511 /* Check argument list functions %VAL, %LOC and %REF. There is
1512 nothing to do for %REF. */
1513 if (arg
->name
&& arg
->name
[0] == '%')
1515 if (strncmp ("%VAL", arg
->name
, 4) == 0)
1517 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
1519 gfc_error ("By-value argument at %L is not of numeric "
1526 gfc_error ("By-value argument at %L cannot be an array or "
1527 "an array section", &e
->where
);
1531 /* Intrinsics are still PROC_UNKNOWN here. However,
1532 since same file external procedures are not resolvable
1533 in gfortran, it is a good deal easier to leave them to
1535 if (ptype
!= PROC_UNKNOWN
1536 && ptype
!= PROC_DUMMY
1537 && ptype
!= PROC_EXTERNAL
1538 && ptype
!= PROC_MODULE
)
1540 gfc_error ("By-value argument at %L is not allowed "
1541 "in this context", &e
->where
);
1546 /* Statement functions have already been excluded above. */
1547 else if (strncmp ("%LOC", arg
->name
, 4) == 0
1548 && e
->ts
.type
== BT_PROCEDURE
)
1550 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
1552 gfc_error ("Passing internal procedure at %L by location "
1553 "not allowed", &e
->where
);
1559 /* Fortran 2008, C1237. */
1560 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
1561 && gfc_has_ultimate_pointer (e
))
1563 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
1564 "component", &e
->where
);
1573 /* Do the checks of the actual argument list that are specific to elemental
1574 procedures. If called with c == NULL, we have a function, otherwise if
1575 expr == NULL, we have a subroutine. */
1578 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
1580 gfc_actual_arglist
*arg0
;
1581 gfc_actual_arglist
*arg
;
1582 gfc_symbol
*esym
= NULL
;
1583 gfc_intrinsic_sym
*isym
= NULL
;
1585 gfc_intrinsic_arg
*iformal
= NULL
;
1586 gfc_formal_arglist
*eformal
= NULL
;
1587 bool formal_optional
= false;
1588 bool set_by_optional
= false;
1592 /* Is this an elemental procedure? */
1593 if (expr
&& expr
->value
.function
.actual
!= NULL
)
1595 if (expr
->value
.function
.esym
!= NULL
1596 && expr
->value
.function
.esym
->attr
.elemental
)
1598 arg0
= expr
->value
.function
.actual
;
1599 esym
= expr
->value
.function
.esym
;
1601 else if (expr
->value
.function
.isym
!= NULL
1602 && expr
->value
.function
.isym
->elemental
)
1604 arg0
= expr
->value
.function
.actual
;
1605 isym
= expr
->value
.function
.isym
;
1610 else if (c
&& c
->ext
.actual
!= NULL
)
1612 arg0
= c
->ext
.actual
;
1614 if (c
->resolved_sym
)
1615 esym
= c
->resolved_sym
;
1617 esym
= c
->symtree
->n
.sym
;
1620 if (!esym
->attr
.elemental
)
1626 /* The rank of an elemental is the rank of its array argument(s). */
1627 for (arg
= arg0
; arg
; arg
= arg
->next
)
1629 if (arg
->expr
!= NULL
&& arg
->expr
->rank
> 0)
1631 rank
= arg
->expr
->rank
;
1632 if (arg
->expr
->expr_type
== EXPR_VARIABLE
1633 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
1634 set_by_optional
= true;
1636 /* Function specific; set the result rank and shape. */
1640 if (!expr
->shape
&& arg
->expr
->shape
)
1642 expr
->shape
= gfc_get_shape (rank
);
1643 for (i
= 0; i
< rank
; i
++)
1644 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
1651 /* If it is an array, it shall not be supplied as an actual argument
1652 to an elemental procedure unless an array of the same rank is supplied
1653 as an actual argument corresponding to a nonoptional dummy argument of
1654 that elemental procedure(12.4.1.5). */
1655 formal_optional
= false;
1657 iformal
= isym
->formal
;
1659 eformal
= esym
->formal
;
1661 for (arg
= arg0
; arg
; arg
= arg
->next
)
1665 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
1666 formal_optional
= true;
1667 eformal
= eformal
->next
;
1669 else if (isym
&& iformal
)
1671 if (iformal
->optional
)
1672 formal_optional
= true;
1673 iformal
= iformal
->next
;
1676 formal_optional
= true;
1678 if (pedantic
&& arg
->expr
!= NULL
1679 && arg
->expr
->expr_type
== EXPR_VARIABLE
1680 && arg
->expr
->symtree
->n
.sym
->attr
.optional
1683 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
1684 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
1686 gfc_warning ("'%s' at %L is an array and OPTIONAL; IF IT IS "
1687 "MISSING, it cannot be the actual argument of an "
1688 "ELEMENTAL procedure unless there is a non-optional "
1689 "argument with the same rank (12.4.1.5)",
1690 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
1695 for (arg
= arg0
; arg
; arg
= arg
->next
)
1697 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
1700 /* Being elemental, the last upper bound of an assumed size array
1701 argument must be present. */
1702 if (resolve_assumed_size_actual (arg
->expr
))
1705 /* Elemental procedure's array actual arguments must conform. */
1708 if (gfc_check_conformance (arg
->expr
, e
,
1709 "elemental procedure") == FAILURE
)
1716 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
1717 is an array, the intent inout/out variable needs to be also an array. */
1718 if (rank
> 0 && esym
&& expr
== NULL
)
1719 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
1720 arg
= arg
->next
, eformal
= eformal
->next
)
1721 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
1722 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
1723 && arg
->expr
&& arg
->expr
->rank
== 0)
1725 gfc_error ("Actual argument at %L for INTENT(%s) dummy '%s' of "
1726 "ELEMENTAL subroutine '%s' is a scalar, but another "
1727 "actual argument is an array", &arg
->expr
->where
,
1728 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
1729 : "INOUT", eformal
->sym
->name
, esym
->name
);
1736 /* Go through each actual argument in ACTUAL and see if it can be
1737 implemented as an inlined, non-copying intrinsic. FNSYM is the
1738 function being called, or NULL if not known. */
1741 find_noncopying_intrinsics (gfc_symbol
*fnsym
, gfc_actual_arglist
*actual
)
1743 gfc_actual_arglist
*ap
;
1746 for (ap
= actual
; ap
; ap
= ap
->next
)
1748 && (expr
= gfc_get_noncopying_intrinsic_argument (ap
->expr
))
1749 && !gfc_check_fncall_dependency (expr
, INTENT_IN
, fnsym
, actual
,
1751 ap
->expr
->inline_noncopying_intrinsic
= 1;
1755 /* This function does the checking of references to global procedures
1756 as defined in sections 18.1 and 14.1, respectively, of the Fortran
1757 77 and 95 standards. It checks for a gsymbol for the name, making
1758 one if it does not already exist. If it already exists, then the
1759 reference being resolved must correspond to the type of gsymbol.
1760 Otherwise, the new symbol is equipped with the attributes of the
1761 reference. The corresponding code that is called in creating
1762 global entities is parse.c.
1764 In addition, for all but -std=legacy, the gsymbols are used to
1765 check the interfaces of external procedures from the same file.
1766 The namespace of the gsymbol is resolved and then, once this is
1767 done the interface is checked. */
1771 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
1773 if (!gsym_ns
->proc_name
->attr
.recursive
)
1776 if (sym
->ns
== gsym_ns
)
1779 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
1786 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
1788 if (gsym_ns
->entries
)
1790 gfc_entry_list
*entry
= gsym_ns
->entries
;
1792 for (; entry
; entry
= entry
->next
)
1794 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
1796 if (strcmp (gsym_ns
->proc_name
->name
,
1797 sym
->ns
->proc_name
->name
) == 0)
1801 && strcmp (gsym_ns
->proc_name
->name
,
1802 sym
->ns
->parent
->proc_name
->name
) == 0)
1811 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
1812 gfc_actual_arglist
**actual
, int sub
)
1816 enum gfc_symbol_type type
;
1818 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
1820 gsym
= gfc_get_gsymbol (sym
->name
);
1822 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
1823 gfc_global_used (gsym
, where
);
1825 if (gfc_option
.flag_whole_file
1826 && sym
->attr
.if_source
== IFSRC_UNKNOWN
1827 && gsym
->type
!= GSYM_UNKNOWN
1829 && gsym
->ns
->resolved
!= -1
1830 && gsym
->ns
->proc_name
1831 && not_in_recursive (sym
, gsym
->ns
)
1832 && not_entry_self_reference (sym
, gsym
->ns
))
1834 /* Make sure that translation for the gsymbol occurs before
1835 the procedure currently being resolved. */
1836 ns
= gsym
->ns
->resolved
? NULL
: gfc_global_ns_list
;
1837 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
1839 if (ns
->sibling
== gsym
->ns
)
1841 ns
->sibling
= gsym
->ns
->sibling
;
1842 gsym
->ns
->sibling
= gfc_global_ns_list
;
1843 gfc_global_ns_list
= gsym
->ns
;
1848 if (!gsym
->ns
->resolved
)
1850 gfc_dt_list
*old_dt_list
;
1852 /* Stash away derived types so that the backend_decls do not
1854 old_dt_list
= gfc_derived_types
;
1855 gfc_derived_types
= NULL
;
1857 gfc_resolve (gsym
->ns
);
1859 /* Store the new derived types with the global namespace. */
1860 if (gfc_derived_types
)
1861 gsym
->ns
->derived_types
= gfc_derived_types
;
1863 /* Restore the derived types of this namespace. */
1864 gfc_derived_types
= old_dt_list
;
1867 if (gsym
->ns
->proc_name
->attr
.function
1868 && gsym
->ns
->proc_name
->as
1869 && gsym
->ns
->proc_name
->as
->rank
1870 && (!sym
->as
|| sym
->as
->rank
!= gsym
->ns
->proc_name
->as
->rank
))
1871 gfc_error ("The reference to function '%s' at %L either needs an "
1872 "explicit INTERFACE or the rank is incorrect", sym
->name
,
1875 /* Non-assumed length character functions. */
1876 if (sym
->attr
.function
&& sym
->ts
.type
== BT_CHARACTER
1877 && gsym
->ns
->proc_name
->ts
.u
.cl
!= NULL
1878 && gsym
->ns
->proc_name
->ts
.u
.cl
->length
!= NULL
)
1880 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
1882 if (!sym
->attr
.entry_master
&& sym
->attr
.if_source
== IFSRC_UNKNOWN
1883 && cl
&& cl
->length
&& cl
->length
->expr_type
!= EXPR_CONSTANT
)
1885 gfc_error ("Nonconstant character-length function '%s' at %L "
1886 "must have an explicit interface", sym
->name
,
1891 if (gfc_option
.flag_whole_file
== 1
1892 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
1894 !(gfc_option
.warn_std
& GFC_STD_GNU
)))
1895 gfc_errors_to_warnings (1);
1897 gfc_procedure_use (gsym
->ns
->proc_name
, actual
, where
);
1899 gfc_errors_to_warnings (0);
1902 if (gsym
->type
== GSYM_UNKNOWN
)
1905 gsym
->where
= *where
;
1912 /************* Function resolution *************/
1914 /* Resolve a function call known to be generic.
1915 Section 14.1.2.4.1. */
1918 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
1922 if (sym
->attr
.generic
)
1924 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
1927 expr
->value
.function
.name
= s
->name
;
1928 expr
->value
.function
.esym
= s
;
1930 if (s
->ts
.type
!= BT_UNKNOWN
)
1932 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
1933 expr
->ts
= s
->result
->ts
;
1936 expr
->rank
= s
->as
->rank
;
1937 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
1938 expr
->rank
= s
->result
->as
->rank
;
1940 gfc_set_sym_referenced (expr
->value
.function
.esym
);
1945 /* TODO: Need to search for elemental references in generic
1949 if (sym
->attr
.intrinsic
)
1950 return gfc_intrinsic_func_interface (expr
, 0);
1957 resolve_generic_f (gfc_expr
*expr
)
1962 sym
= expr
->symtree
->n
.sym
;
1966 m
= resolve_generic_f0 (expr
, sym
);
1969 else if (m
== MATCH_ERROR
)
1973 if (sym
->ns
->parent
== NULL
)
1975 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
1979 if (!generic_sym (sym
))
1983 /* Last ditch attempt. See if the reference is to an intrinsic
1984 that possesses a matching interface. 14.1.2.4 */
1985 if (sym
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
1987 gfc_error ("There is no specific function for the generic '%s' at %L",
1988 expr
->symtree
->n
.sym
->name
, &expr
->where
);
1992 m
= gfc_intrinsic_func_interface (expr
, 0);
1996 gfc_error ("Generic function '%s' at %L is not consistent with a "
1997 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2004 /* Resolve a function call known to be specific. */
2007 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2011 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2013 if (sym
->attr
.dummy
)
2015 sym
->attr
.proc
= PROC_DUMMY
;
2019 sym
->attr
.proc
= PROC_EXTERNAL
;
2023 if (sym
->attr
.proc
== PROC_MODULE
2024 || sym
->attr
.proc
== PROC_ST_FUNCTION
2025 || sym
->attr
.proc
== PROC_INTERNAL
)
2028 if (sym
->attr
.intrinsic
)
2030 m
= gfc_intrinsic_func_interface (expr
, 1);
2034 gfc_error ("Function '%s' at %L is INTRINSIC but is not compatible "
2035 "with an intrinsic", sym
->name
, &expr
->where
);
2043 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2046 expr
->ts
= sym
->result
->ts
;
2049 expr
->value
.function
.name
= sym
->name
;
2050 expr
->value
.function
.esym
= sym
;
2051 if (sym
->as
!= NULL
)
2052 expr
->rank
= sym
->as
->rank
;
2059 resolve_specific_f (gfc_expr
*expr
)
2064 sym
= expr
->symtree
->n
.sym
;
2068 m
= resolve_specific_f0 (sym
, expr
);
2071 if (m
== MATCH_ERROR
)
2074 if (sym
->ns
->parent
== NULL
)
2077 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2083 gfc_error ("Unable to resolve the specific function '%s' at %L",
2084 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2090 /* Resolve a procedure call not known to be generic nor specific. */
2093 resolve_unknown_f (gfc_expr
*expr
)
2098 sym
= expr
->symtree
->n
.sym
;
2100 if (sym
->attr
.dummy
)
2102 sym
->attr
.proc
= PROC_DUMMY
;
2103 expr
->value
.function
.name
= sym
->name
;
2107 /* See if we have an intrinsic function reference. */
2109 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2111 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2116 /* The reference is to an external name. */
2118 sym
->attr
.proc
= PROC_EXTERNAL
;
2119 expr
->value
.function
.name
= sym
->name
;
2120 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2122 if (sym
->as
!= NULL
)
2123 expr
->rank
= sym
->as
->rank
;
2125 /* Type of the expression is either the type of the symbol or the
2126 default type of the symbol. */
2129 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2131 if (sym
->ts
.type
!= BT_UNKNOWN
)
2135 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2137 if (ts
->type
== BT_UNKNOWN
)
2139 gfc_error ("Function '%s' at %L has no IMPLICIT type",
2140 sym
->name
, &expr
->where
);
2151 /* Return true, if the symbol is an external procedure. */
2153 is_external_proc (gfc_symbol
*sym
)
2155 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2156 && !(sym
->attr
.intrinsic
2157 || gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
))
2158 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2159 && !sym
->attr
.use_assoc
2167 /* Figure out if a function reference is pure or not. Also set the name
2168 of the function for a potential error message. Return nonzero if the
2169 function is PURE, zero if not. */
2171 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2174 pure_function (gfc_expr
*e
, const char **name
)
2180 if (e
->symtree
!= NULL
2181 && e
->symtree
->n
.sym
!= NULL
2182 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2183 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2185 if (e
->value
.function
.esym
)
2187 pure
= gfc_pure (e
->value
.function
.esym
);
2188 *name
= e
->value
.function
.esym
->name
;
2190 else if (e
->value
.function
.isym
)
2192 pure
= e
->value
.function
.isym
->pure
2193 || e
->value
.function
.isym
->elemental
;
2194 *name
= e
->value
.function
.isym
->name
;
2198 /* Implicit functions are not pure. */
2200 *name
= e
->value
.function
.name
;
2208 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2209 int *f ATTRIBUTE_UNUSED
)
2213 /* Don't bother recursing into other statement functions
2214 since they will be checked individually for purity. */
2215 if (e
->expr_type
!= EXPR_FUNCTION
2217 || e
->symtree
->n
.sym
== sym
2218 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2221 return pure_function (e
, &name
) ? false : true;
2226 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2228 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
2233 is_scalar_expr_ptr (gfc_expr
*expr
)
2235 gfc_try retval
= SUCCESS
;
2240 /* See if we have a gfc_ref, which means we have a substring, array
2241 reference, or a component. */
2242 if (expr
->ref
!= NULL
)
2245 while (ref
->next
!= NULL
)
2251 if (ref
->u
.ss
.length
!= NULL
2252 && ref
->u
.ss
.length
->length
!= NULL
2254 && ref
->u
.ss
.start
->expr_type
== EXPR_CONSTANT
2256 && ref
->u
.ss
.end
->expr_type
== EXPR_CONSTANT
)
2258 start
= (int) mpz_get_si (ref
->u
.ss
.start
->value
.integer
);
2259 end
= (int) mpz_get_si (ref
->u
.ss
.end
->value
.integer
);
2260 if (end
- start
+ 1 != 1)
2267 if (ref
->u
.ar
.type
== AR_ELEMENT
)
2269 else if (ref
->u
.ar
.type
== AR_FULL
)
2271 /* The user can give a full array if the array is of size 1. */
2272 if (ref
->u
.ar
.as
!= NULL
2273 && ref
->u
.ar
.as
->rank
== 1
2274 && ref
->u
.ar
.as
->type
== AS_EXPLICIT
2275 && ref
->u
.ar
.as
->lower
[0] != NULL
2276 && ref
->u
.ar
.as
->lower
[0]->expr_type
== EXPR_CONSTANT
2277 && ref
->u
.ar
.as
->upper
[0] != NULL
2278 && ref
->u
.ar
.as
->upper
[0]->expr_type
== EXPR_CONSTANT
)
2280 /* If we have a character string, we need to check if
2281 its length is one. */
2282 if (expr
->ts
.type
== BT_CHARACTER
)
2284 if (expr
->ts
.u
.cl
== NULL
2285 || expr
->ts
.u
.cl
->length
== NULL
2286 || mpz_cmp_si (expr
->ts
.u
.cl
->length
->value
.integer
, 1)
2292 /* We have constant lower and upper bounds. If the
2293 difference between is 1, it can be considered a
2295 start
= (int) mpz_get_si
2296 (ref
->u
.ar
.as
->lower
[0]->value
.integer
);
2297 end
= (int) mpz_get_si
2298 (ref
->u
.ar
.as
->upper
[0]->value
.integer
);
2299 if (end
- start
+ 1 != 1)
2314 else if (expr
->ts
.type
== BT_CHARACTER
&& expr
->rank
== 0)
2316 /* Character string. Make sure it's of length 1. */
2317 if (expr
->ts
.u
.cl
== NULL
2318 || expr
->ts
.u
.cl
->length
== NULL
2319 || mpz_cmp_si (expr
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
2322 else if (expr
->rank
!= 0)
2329 /* Match one of the iso_c_binding functions (c_associated or c_loc)
2330 and, in the case of c_associated, set the binding label based on
2334 gfc_iso_c_func_interface (gfc_symbol
*sym
, gfc_actual_arglist
*args
,
2335 gfc_symbol
**new_sym
)
2337 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2338 char binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
2339 int optional_arg
= 0, is_pointer
= 0;
2340 gfc_try retval
= SUCCESS
;
2341 gfc_symbol
*args_sym
;
2342 gfc_typespec
*arg_ts
;
2344 if (args
->expr
->expr_type
== EXPR_CONSTANT
2345 || args
->expr
->expr_type
== EXPR_OP
2346 || args
->expr
->expr_type
== EXPR_NULL
)
2348 gfc_error ("Argument to '%s' at %L is not a variable",
2349 sym
->name
, &(args
->expr
->where
));
2353 args_sym
= args
->expr
->symtree
->n
.sym
;
2355 /* The typespec for the actual arg should be that stored in the expr
2356 and not necessarily that of the expr symbol (args_sym), because
2357 the actual expression could be a part-ref of the expr symbol. */
2358 arg_ts
= &(args
->expr
->ts
);
2360 is_pointer
= gfc_is_data_pointer (args
->expr
);
2362 if (sym
->intmod_sym_id
== ISOCBINDING_ASSOCIATED
)
2364 /* If the user gave two args then they are providing something for
2365 the optional arg (the second cptr). Therefore, set the name and
2366 binding label to the c_associated for two cptrs. Otherwise,
2367 set c_associated to expect one cptr. */
2371 sprintf (name
, "%s_2", sym
->name
);
2372 sprintf (binding_label
, "%s_2", sym
->binding_label
);
2378 sprintf (name
, "%s_1", sym
->name
);
2379 sprintf (binding_label
, "%s_1", sym
->binding_label
);
2383 /* Get a new symbol for the version of c_associated that
2385 *new_sym
= get_iso_c_sym (sym
, name
, binding_label
, optional_arg
);
2387 else if (sym
->intmod_sym_id
== ISOCBINDING_LOC
2388 || sym
->intmod_sym_id
== ISOCBINDING_FUNLOC
)
2390 sprintf (name
, "%s", sym
->name
);
2391 sprintf (binding_label
, "%s", sym
->binding_label
);
2393 /* Error check the call. */
2394 if (args
->next
!= NULL
)
2396 gfc_error_now ("More actual than formal arguments in '%s' "
2397 "call at %L", name
, &(args
->expr
->where
));
2400 else if (sym
->intmod_sym_id
== ISOCBINDING_LOC
)
2402 /* Make sure we have either the target or pointer attribute. */
2403 if (!args_sym
->attr
.target
&& !is_pointer
)
2405 gfc_error_now ("Parameter '%s' to '%s' at %L must be either "
2406 "a TARGET or an associated pointer",
2408 sym
->name
, &(args
->expr
->where
));
2412 /* See if we have interoperable type and type param. */
2413 if (verify_c_interop (arg_ts
) == SUCCESS
2414 || gfc_check_any_c_kind (arg_ts
) == SUCCESS
)
2416 if (args_sym
->attr
.target
== 1)
2418 /* Case 1a, section 15.1.2.5, J3/04-007: variable that
2419 has the target attribute and is interoperable. */
2420 /* Case 1b, section 15.1.2.5, J3/04-007: allocated
2421 allocatable variable that has the TARGET attribute and
2422 is not an array of zero size. */
2423 if (args_sym
->attr
.allocatable
== 1)
2425 if (args_sym
->attr
.dimension
!= 0
2426 && (args_sym
->as
&& args_sym
->as
->rank
== 0))
2428 gfc_error_now ("Allocatable variable '%s' used as a "
2429 "parameter to '%s' at %L must not be "
2430 "an array of zero size",
2431 args_sym
->name
, sym
->name
,
2432 &(args
->expr
->where
));
2438 /* A non-allocatable target variable with C
2439 interoperable type and type parameters must be
2441 if (args_sym
&& args_sym
->attr
.dimension
)
2443 if (args_sym
->as
->type
== AS_ASSUMED_SHAPE
)
2445 gfc_error ("Assumed-shape array '%s' at %L "
2446 "cannot be an argument to the "
2447 "procedure '%s' because "
2448 "it is not C interoperable",
2450 &(args
->expr
->where
), sym
->name
);
2453 else if (args_sym
->as
->type
== AS_DEFERRED
)
2455 gfc_error ("Deferred-shape array '%s' at %L "
2456 "cannot be an argument to the "
2457 "procedure '%s' because "
2458 "it is not C interoperable",
2460 &(args
->expr
->where
), sym
->name
);
2465 /* Make sure it's not a character string. Arrays of
2466 any type should be ok if the variable is of a C
2467 interoperable type. */
2468 if (arg_ts
->type
== BT_CHARACTER
)
2469 if (arg_ts
->u
.cl
!= NULL
2470 && (arg_ts
->u
.cl
->length
== NULL
2471 || arg_ts
->u
.cl
->length
->expr_type
2474 (arg_ts
->u
.cl
->length
->value
.integer
, 1)
2476 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2478 gfc_error_now ("CHARACTER argument '%s' to '%s' "
2479 "at %L must have a length of 1",
2480 args_sym
->name
, sym
->name
,
2481 &(args
->expr
->where
));
2487 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2489 /* Case 1c, section 15.1.2.5, J3/04-007: an associated
2491 gfc_error_now ("Argument '%s' to '%s' at %L must be an "
2492 "associated scalar POINTER", args_sym
->name
,
2493 sym
->name
, &(args
->expr
->where
));
2499 /* The parameter is not required to be C interoperable. If it
2500 is not C interoperable, it must be a nonpolymorphic scalar
2501 with no length type parameters. It still must have either
2502 the pointer or target attribute, and it can be
2503 allocatable (but must be allocated when c_loc is called). */
2504 if (args
->expr
->rank
!= 0
2505 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2507 gfc_error_now ("Parameter '%s' to '%s' at %L must be a "
2508 "scalar", args_sym
->name
, sym
->name
,
2509 &(args
->expr
->where
));
2512 else if (arg_ts
->type
== BT_CHARACTER
2513 && is_scalar_expr_ptr (args
->expr
) != SUCCESS
)
2515 gfc_error_now ("CHARACTER argument '%s' to '%s' at "
2516 "%L must have a length of 1",
2517 args_sym
->name
, sym
->name
,
2518 &(args
->expr
->where
));
2523 else if (sym
->intmod_sym_id
== ISOCBINDING_FUNLOC
)
2525 if (args_sym
->attr
.flavor
!= FL_PROCEDURE
)
2527 /* TODO: Update this error message to allow for procedure
2528 pointers once they are implemented. */
2529 gfc_error_now ("Parameter '%s' to '%s' at %L must be a "
2531 args_sym
->name
, sym
->name
,
2532 &(args
->expr
->where
));
2535 else if (args_sym
->attr
.is_bind_c
!= 1)
2537 gfc_error_now ("Parameter '%s' to '%s' at %L must be "
2539 args_sym
->name
, sym
->name
,
2540 &(args
->expr
->where
));
2545 /* for c_loc/c_funloc, the new symbol is the same as the old one */
2550 gfc_internal_error ("gfc_iso_c_func_interface(): Unhandled "
2551 "iso_c_binding function: '%s'!\n", sym
->name
);
2558 /* Resolve a function call, which means resolving the arguments, then figuring
2559 out which entity the name refers to. */
2560 /* TODO: Check procedure arguments so that an INTENT(IN) isn't passed
2561 to INTENT(OUT) or INTENT(INOUT). */
2564 resolve_function (gfc_expr
*expr
)
2566 gfc_actual_arglist
*arg
;
2571 procedure_type p
= PROC_INTRINSIC
;
2572 bool no_formal_args
;
2576 sym
= expr
->symtree
->n
.sym
;
2578 /* If this is a procedure pointer component, it has already been resolved. */
2579 if (gfc_is_proc_ptr_comp (expr
, NULL
))
2582 if (sym
&& sym
->attr
.intrinsic
2583 && resolve_intrinsic (sym
, &expr
->where
) == FAILURE
)
2586 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
2588 gfc_error ("'%s' at %L is not a function", sym
->name
, &expr
->where
);
2592 /* If this ia a deferred TBP with an abstract interface (which may
2593 of course be referenced), expr->value.function.esym will be set. */
2594 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
2596 gfc_error ("ABSTRACT INTERFACE '%s' must not be referenced at %L",
2597 sym
->name
, &expr
->where
);
2601 /* Switch off assumed size checking and do this again for certain kinds
2602 of procedure, once the procedure itself is resolved. */
2603 need_full_assumed_size
++;
2605 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
2606 p
= expr
->symtree
->n
.sym
->attr
.proc
;
2608 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
2609 inquiry_argument
= true;
2610 no_formal_args
= sym
&& is_external_proc (sym
) && sym
->formal
== NULL
;
2612 if (resolve_actual_arglist (expr
->value
.function
.actual
,
2613 p
, no_formal_args
) == FAILURE
)
2615 inquiry_argument
= false;
2619 inquiry_argument
= false;
2621 /* Need to setup the call to the correct c_associated, depending on
2622 the number of cptrs to user gives to compare. */
2623 if (sym
&& sym
->attr
.is_iso_c
== 1)
2625 if (gfc_iso_c_func_interface (sym
, expr
->value
.function
.actual
, &sym
)
2629 /* Get the symtree for the new symbol (resolved func).
2630 the old one will be freed later, when it's no longer used. */
2631 gfc_find_sym_tree (sym
->name
, sym
->ns
, 1, &(expr
->symtree
));
2634 /* Resume assumed_size checking. */
2635 need_full_assumed_size
--;
2637 /* If the procedure is external, check for usage. */
2638 if (sym
&& is_external_proc (sym
))
2639 resolve_global_procedure (sym
, &expr
->where
,
2640 &expr
->value
.function
.actual
, 0);
2642 if (sym
&& sym
->ts
.type
== BT_CHARACTER
2644 && sym
->ts
.u
.cl
->length
== NULL
2646 && expr
->value
.function
.esym
== NULL
2647 && !sym
->attr
.contained
)
2649 /* Internal procedures are taken care of in resolve_contained_fntype. */
2650 gfc_error ("Function '%s' is declared CHARACTER(*) and cannot "
2651 "be used at %L since it is not a dummy argument",
2652 sym
->name
, &expr
->where
);
2656 /* See if function is already resolved. */
2658 if (expr
->value
.function
.name
!= NULL
)
2660 if (expr
->ts
.type
== BT_UNKNOWN
)
2666 /* Apply the rules of section 14.1.2. */
2668 switch (procedure_kind (sym
))
2671 t
= resolve_generic_f (expr
);
2674 case PTYPE_SPECIFIC
:
2675 t
= resolve_specific_f (expr
);
2679 t
= resolve_unknown_f (expr
);
2683 gfc_internal_error ("resolve_function(): bad function type");
2687 /* If the expression is still a function (it might have simplified),
2688 then we check to see if we are calling an elemental function. */
2690 if (expr
->expr_type
!= EXPR_FUNCTION
)
2693 temp
= need_full_assumed_size
;
2694 need_full_assumed_size
= 0;
2696 if (resolve_elemental_actual (expr
, NULL
) == FAILURE
)
2699 if (omp_workshare_flag
2700 && expr
->value
.function
.esym
2701 && ! gfc_elemental (expr
->value
.function
.esym
))
2703 gfc_error ("User defined non-ELEMENTAL function '%s' at %L not allowed "
2704 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
2709 #define GENERIC_ID expr->value.function.isym->id
2710 else if (expr
->value
.function
.actual
!= NULL
2711 && expr
->value
.function
.isym
!= NULL
2712 && GENERIC_ID
!= GFC_ISYM_LBOUND
2713 && GENERIC_ID
!= GFC_ISYM_LEN
2714 && GENERIC_ID
!= GFC_ISYM_LOC
2715 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
2717 /* Array intrinsics must also have the last upper bound of an
2718 assumed size array argument. UBOUND and SIZE have to be
2719 excluded from the check if the second argument is anything
2722 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
2724 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
2725 && arg
->next
!= NULL
&& arg
->next
->expr
)
2727 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
2730 if (arg
->next
->name
&& strncmp(arg
->next
->name
, "kind", 4) == 0)
2733 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
2738 if (arg
->expr
!= NULL
2739 && arg
->expr
->rank
> 0
2740 && resolve_assumed_size_actual (arg
->expr
))
2746 need_full_assumed_size
= temp
;
2749 if (!pure_function (expr
, &name
) && name
)
2753 gfc_error ("reference to non-PURE function '%s' at %L inside a "
2754 "FORALL %s", name
, &expr
->where
,
2755 forall_flag
== 2 ? "mask" : "block");
2758 else if (gfc_pure (NULL
))
2760 gfc_error ("Function reference to '%s' at %L is to a non-PURE "
2761 "procedure within a PURE procedure", name
, &expr
->where
);
2766 /* Functions without the RECURSIVE attribution are not allowed to
2767 * call themselves. */
2768 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
2771 esym
= expr
->value
.function
.esym
;
2773 if (is_illegal_recursion (esym
, gfc_current_ns
))
2775 if (esym
->attr
.entry
&& esym
->ns
->entries
)
2776 gfc_error ("ENTRY '%s' at %L cannot be called recursively, as"
2777 " function '%s' is not RECURSIVE",
2778 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
2780 gfc_error ("Function '%s' at %L cannot be called recursively, as it"
2781 " is not RECURSIVE", esym
->name
, &expr
->where
);
2787 /* Character lengths of use associated functions may contains references to
2788 symbols not referenced from the current program unit otherwise. Make sure
2789 those symbols are marked as referenced. */
2791 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
2792 && expr
->value
.function
.esym
->attr
.use_assoc
)
2794 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
2798 && !((expr
->value
.function
.esym
2799 && expr
->value
.function
.esym
->attr
.elemental
)
2801 (expr
->value
.function
.isym
2802 && expr
->value
.function
.isym
->elemental
)))
2803 find_noncopying_intrinsics (expr
->value
.function
.esym
,
2804 expr
->value
.function
.actual
);
2806 /* Make sure that the expression has a typespec that works. */
2807 if (expr
->ts
.type
== BT_UNKNOWN
)
2809 if (expr
->symtree
->n
.sym
->result
2810 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
2811 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
2812 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
2819 /************* Subroutine resolution *************/
2822 pure_subroutine (gfc_code
*c
, gfc_symbol
*sym
)
2828 gfc_error ("Subroutine call to '%s' in FORALL block at %L is not PURE",
2829 sym
->name
, &c
->loc
);
2830 else if (gfc_pure (NULL
))
2831 gfc_error ("Subroutine call to '%s' at %L is not PURE", sym
->name
,
2837 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
2841 if (sym
->attr
.generic
)
2843 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
2846 c
->resolved_sym
= s
;
2847 pure_subroutine (c
, s
);
2851 /* TODO: Need to search for elemental references in generic interface. */
2854 if (sym
->attr
.intrinsic
)
2855 return gfc_intrinsic_sub_interface (c
, 0);
2862 resolve_generic_s (gfc_code
*c
)
2867 sym
= c
->symtree
->n
.sym
;
2871 m
= resolve_generic_s0 (c
, sym
);
2874 else if (m
== MATCH_ERROR
)
2878 if (sym
->ns
->parent
== NULL
)
2880 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2884 if (!generic_sym (sym
))
2888 /* Last ditch attempt. See if the reference is to an intrinsic
2889 that possesses a matching interface. 14.1.2.4 */
2890 sym
= c
->symtree
->n
.sym
;
2892 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
2894 gfc_error ("There is no specific subroutine for the generic '%s' at %L",
2895 sym
->name
, &c
->loc
);
2899 m
= gfc_intrinsic_sub_interface (c
, 0);
2903 gfc_error ("Generic subroutine '%s' at %L is not consistent with an "
2904 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
2910 /* Set the name and binding label of the subroutine symbol in the call
2911 expression represented by 'c' to include the type and kind of the
2912 second parameter. This function is for resolving the appropriate
2913 version of c_f_pointer() and c_f_procpointer(). For example, a
2914 call to c_f_pointer() for a default integer pointer could have a
2915 name of c_f_pointer_i4. If no second arg exists, which is an error
2916 for these two functions, it defaults to the generic symbol's name
2917 and binding label. */
2920 set_name_and_label (gfc_code
*c
, gfc_symbol
*sym
,
2921 char *name
, char *binding_label
)
2923 gfc_expr
*arg
= NULL
;
2927 /* The second arg of c_f_pointer and c_f_procpointer determines
2928 the type and kind for the procedure name. */
2929 arg
= c
->ext
.actual
->next
->expr
;
2933 /* Set up the name to have the given symbol's name,
2934 plus the type and kind. */
2935 /* a derived type is marked with the type letter 'u' */
2936 if (arg
->ts
.type
== BT_DERIVED
)
2939 kind
= 0; /* set the kind as 0 for now */
2943 type
= gfc_type_letter (arg
->ts
.type
);
2944 kind
= arg
->ts
.kind
;
2947 if (arg
->ts
.type
== BT_CHARACTER
)
2948 /* Kind info for character strings not needed. */
2951 sprintf (name
, "%s_%c%d", sym
->name
, type
, kind
);
2952 /* Set up the binding label as the given symbol's label plus
2953 the type and kind. */
2954 sprintf (binding_label
, "%s_%c%d", sym
->binding_label
, type
, kind
);
2958 /* If the second arg is missing, set the name and label as
2959 was, cause it should at least be found, and the missing
2960 arg error will be caught by compare_parameters(). */
2961 sprintf (name
, "%s", sym
->name
);
2962 sprintf (binding_label
, "%s", sym
->binding_label
);
2969 /* Resolve a generic version of the iso_c_binding procedure given
2970 (sym) to the specific one based on the type and kind of the
2971 argument(s). Currently, this function resolves c_f_pointer() and
2972 c_f_procpointer based on the type and kind of the second argument
2973 (FPTR). Other iso_c_binding procedures aren't specially handled.
2974 Upon successfully exiting, c->resolved_sym will hold the resolved
2975 symbol. Returns MATCH_ERROR if an error occurred; MATCH_YES
2979 gfc_iso_c_sub_interface (gfc_code
*c
, gfc_symbol
*sym
)
2981 gfc_symbol
*new_sym
;
2982 /* this is fine, since we know the names won't use the max */
2983 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2984 char binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
2985 /* default to success; will override if find error */
2986 match m
= MATCH_YES
;
2988 /* Make sure the actual arguments are in the necessary order (based on the
2989 formal args) before resolving. */
2990 gfc_procedure_use (sym
, &c
->ext
.actual
, &(c
->loc
));
2992 if ((sym
->intmod_sym_id
== ISOCBINDING_F_POINTER
) ||
2993 (sym
->intmod_sym_id
== ISOCBINDING_F_PROCPOINTER
))
2995 set_name_and_label (c
, sym
, name
, binding_label
);
2997 if (sym
->intmod_sym_id
== ISOCBINDING_F_POINTER
)
2999 if (c
->ext
.actual
!= NULL
&& c
->ext
.actual
->next
!= NULL
)
3001 /* Make sure we got a third arg if the second arg has non-zero
3002 rank. We must also check that the type and rank are
3003 correct since we short-circuit this check in
3004 gfc_procedure_use() (called above to sort actual args). */
3005 if (c
->ext
.actual
->next
->expr
->rank
!= 0)
3007 if(c
->ext
.actual
->next
->next
== NULL
3008 || c
->ext
.actual
->next
->next
->expr
== NULL
)
3011 gfc_error ("Missing SHAPE parameter for call to %s "
3012 "at %L", sym
->name
, &(c
->loc
));
3014 else if (c
->ext
.actual
->next
->next
->expr
->ts
.type
3016 || c
->ext
.actual
->next
->next
->expr
->rank
!= 1)
3019 gfc_error ("SHAPE parameter for call to %s at %L must "
3020 "be a rank 1 INTEGER array", sym
->name
,
3027 if (m
!= MATCH_ERROR
)
3029 /* the 1 means to add the optional arg to formal list */
3030 new_sym
= get_iso_c_sym (sym
, name
, binding_label
, 1);
3032 /* for error reporting, say it's declared where the original was */
3033 new_sym
->declared_at
= sym
->declared_at
;
3038 /* no differences for c_loc or c_funloc */
3042 /* set the resolved symbol */
3043 if (m
!= MATCH_ERROR
)
3044 c
->resolved_sym
= new_sym
;
3046 c
->resolved_sym
= sym
;
3052 /* Resolve a subroutine call known to be specific. */
3055 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3059 if(sym
->attr
.is_iso_c
)
3061 m
= gfc_iso_c_sub_interface (c
,sym
);
3065 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3067 if (sym
->attr
.dummy
)
3069 sym
->attr
.proc
= PROC_DUMMY
;
3073 sym
->attr
.proc
= PROC_EXTERNAL
;
3077 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3080 if (sym
->attr
.intrinsic
)
3082 m
= gfc_intrinsic_sub_interface (c
, 1);
3086 gfc_error ("Subroutine '%s' at %L is INTRINSIC but is not compatible "
3087 "with an intrinsic", sym
->name
, &c
->loc
);
3095 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3097 c
->resolved_sym
= sym
;
3098 pure_subroutine (c
, sym
);
3105 resolve_specific_s (gfc_code
*c
)
3110 sym
= c
->symtree
->n
.sym
;
3114 m
= resolve_specific_s0 (c
, sym
);
3117 if (m
== MATCH_ERROR
)
3120 if (sym
->ns
->parent
== NULL
)
3123 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3129 sym
= c
->symtree
->n
.sym
;
3130 gfc_error ("Unable to resolve the specific subroutine '%s' at %L",
3131 sym
->name
, &c
->loc
);
3137 /* Resolve a subroutine call not known to be generic nor specific. */
3140 resolve_unknown_s (gfc_code
*c
)
3144 sym
= c
->symtree
->n
.sym
;
3146 if (sym
->attr
.dummy
)
3148 sym
->attr
.proc
= PROC_DUMMY
;
3152 /* See if we have an intrinsic function reference. */
3154 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3156 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3161 /* The reference is to an external name. */
3164 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3166 c
->resolved_sym
= sym
;
3168 pure_subroutine (c
, sym
);
3174 /* Resolve a subroutine call. Although it was tempting to use the same code
3175 for functions, subroutines and functions are stored differently and this
3176 makes things awkward. */
3179 resolve_call (gfc_code
*c
)
3182 procedure_type ptype
= PROC_INTRINSIC
;
3183 gfc_symbol
*csym
, *sym
;
3184 bool no_formal_args
;
3186 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3188 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3190 gfc_error ("'%s' at %L has a type, which is not consistent with "
3191 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3195 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3198 gfc_find_sym_tree (csym
->name
, gfc_current_ns
, 1, &st
);
3199 sym
= st
? st
->n
.sym
: NULL
;
3200 if (sym
&& csym
!= sym
3201 && sym
->ns
== gfc_current_ns
3202 && sym
->attr
.flavor
== FL_PROCEDURE
3203 && sym
->attr
.contained
)
3206 if (csym
->attr
.generic
)
3207 c
->symtree
->n
.sym
= sym
;
3210 csym
= c
->symtree
->n
.sym
;
3214 /* If this ia a deferred TBP with an abstract interface
3215 (which may of course be referenced), c->expr1 will be set. */
3216 if (csym
&& csym
->attr
.abstract
&& !c
->expr1
)
3218 gfc_error ("ABSTRACT INTERFACE '%s' must not be referenced at %L",
3219 csym
->name
, &c
->loc
);
3223 /* Subroutines without the RECURSIVE attribution are not allowed to
3224 * call themselves. */
3225 if (csym
&& is_illegal_recursion (csym
, gfc_current_ns
))
3227 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3228 gfc_error ("ENTRY '%s' at %L cannot be called recursively, as"
3229 " subroutine '%s' is not RECURSIVE",
3230 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3232 gfc_error ("SUBROUTINE '%s' at %L cannot be called recursively, as it"
3233 " is not RECURSIVE", csym
->name
, &c
->loc
);
3238 /* Switch off assumed size checking and do this again for certain kinds
3239 of procedure, once the procedure itself is resolved. */
3240 need_full_assumed_size
++;
3243 ptype
= csym
->attr
.proc
;
3245 no_formal_args
= csym
&& is_external_proc (csym
) && csym
->formal
== NULL
;
3246 if (resolve_actual_arglist (c
->ext
.actual
, ptype
,
3247 no_formal_args
) == FAILURE
)
3250 /* Resume assumed_size checking. */
3251 need_full_assumed_size
--;
3253 /* If external, check for usage. */
3254 if (csym
&& is_external_proc (csym
))
3255 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3258 if (c
->resolved_sym
== NULL
)
3260 c
->resolved_isym
= NULL
;
3261 switch (procedure_kind (csym
))
3264 t
= resolve_generic_s (c
);
3267 case PTYPE_SPECIFIC
:
3268 t
= resolve_specific_s (c
);
3272 t
= resolve_unknown_s (c
);
3276 gfc_internal_error ("resolve_subroutine(): bad function type");
3280 /* Some checks of elemental subroutine actual arguments. */
3281 if (resolve_elemental_actual (NULL
, c
) == FAILURE
)
3284 if (t
== SUCCESS
&& !(c
->resolved_sym
&& c
->resolved_sym
->attr
.elemental
))
3285 find_noncopying_intrinsics (c
->resolved_sym
, c
->ext
.actual
);
3290 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3291 op1->shape and op2->shape are non-NULL return SUCCESS if their shapes
3292 match. If both op1->shape and op2->shape are non-NULL return FAILURE
3293 if their shapes do not match. If either op1->shape or op2->shape is
3294 NULL, return SUCCESS. */
3297 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3304 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3306 for (i
= 0; i
< op1
->rank
; i
++)
3308 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3310 gfc_error ("Shapes for operands at %L and %L are not conformable",
3311 &op1
->where
, &op2
->where
);
3322 /* Resolve an operator expression node. This can involve replacing the
3323 operation with a user defined function call. */
3326 resolve_operator (gfc_expr
*e
)
3328 gfc_expr
*op1
, *op2
;
3330 bool dual_locus_error
;
3333 /* Resolve all subnodes-- give them types. */
3335 switch (e
->value
.op
.op
)
3338 if (gfc_resolve_expr (e
->value
.op
.op2
) == FAILURE
)
3341 /* Fall through... */
3344 case INTRINSIC_UPLUS
:
3345 case INTRINSIC_UMINUS
:
3346 case INTRINSIC_PARENTHESES
:
3347 if (gfc_resolve_expr (e
->value
.op
.op1
) == FAILURE
)
3352 /* Typecheck the new node. */
3354 op1
= e
->value
.op
.op1
;
3355 op2
= e
->value
.op
.op2
;
3356 dual_locus_error
= false;
3358 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3359 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3361 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3365 switch (e
->value
.op
.op
)
3367 case INTRINSIC_UPLUS
:
3368 case INTRINSIC_UMINUS
:
3369 if (op1
->ts
.type
== BT_INTEGER
3370 || op1
->ts
.type
== BT_REAL
3371 || op1
->ts
.type
== BT_COMPLEX
)
3377 sprintf (msg
, _("Operand of unary numeric operator '%s' at %%L is %s"),
3378 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3381 case INTRINSIC_PLUS
:
3382 case INTRINSIC_MINUS
:
3383 case INTRINSIC_TIMES
:
3384 case INTRINSIC_DIVIDE
:
3385 case INTRINSIC_POWER
:
3386 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3388 gfc_type_convert_binary (e
, 1);
3393 _("Operands of binary numeric operator '%s' at %%L are %s/%s"),
3394 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3395 gfc_typename (&op2
->ts
));
3398 case INTRINSIC_CONCAT
:
3399 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3400 && op1
->ts
.kind
== op2
->ts
.kind
)
3402 e
->ts
.type
= BT_CHARACTER
;
3403 e
->ts
.kind
= op1
->ts
.kind
;
3408 _("Operands of string concatenation operator at %%L are %s/%s"),
3409 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3415 case INTRINSIC_NEQV
:
3416 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3418 e
->ts
.type
= BT_LOGICAL
;
3419 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3420 if (op1
->ts
.kind
< e
->ts
.kind
)
3421 gfc_convert_type (op1
, &e
->ts
, 2);
3422 else if (op2
->ts
.kind
< e
->ts
.kind
)
3423 gfc_convert_type (op2
, &e
->ts
, 2);
3427 sprintf (msg
, _("Operands of logical operator '%s' at %%L are %s/%s"),
3428 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3429 gfc_typename (&op2
->ts
));
3434 if (op1
->ts
.type
== BT_LOGICAL
)
3436 e
->ts
.type
= BT_LOGICAL
;
3437 e
->ts
.kind
= op1
->ts
.kind
;
3441 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3442 gfc_typename (&op1
->ts
));
3446 case INTRINSIC_GT_OS
:
3448 case INTRINSIC_GE_OS
:
3450 case INTRINSIC_LT_OS
:
3452 case INTRINSIC_LE_OS
:
3453 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3455 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3459 /* Fall through... */
3462 case INTRINSIC_EQ_OS
:
3464 case INTRINSIC_NE_OS
:
3465 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3466 && op1
->ts
.kind
== op2
->ts
.kind
)
3468 e
->ts
.type
= BT_LOGICAL
;
3469 e
->ts
.kind
= gfc_default_logical_kind
;
3473 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3475 gfc_type_convert_binary (e
, 1);
3477 e
->ts
.type
= BT_LOGICAL
;
3478 e
->ts
.kind
= gfc_default_logical_kind
;
3482 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3484 _("Logicals at %%L must be compared with %s instead of %s"),
3485 (e
->value
.op
.op
== INTRINSIC_EQ
3486 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
3487 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
3490 _("Operands of comparison operator '%s' at %%L are %s/%s"),
3491 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3492 gfc_typename (&op2
->ts
));
3496 case INTRINSIC_USER
:
3497 if (e
->value
.op
.uop
->op
== NULL
)
3498 sprintf (msg
, _("Unknown operator '%s' at %%L"), e
->value
.op
.uop
->name
);
3499 else if (op2
== NULL
)
3500 sprintf (msg
, _("Operand of user operator '%s' at %%L is %s"),
3501 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
3503 sprintf (msg
, _("Operands of user operator '%s' at %%L are %s/%s"),
3504 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
3505 gfc_typename (&op2
->ts
));
3509 case INTRINSIC_PARENTHESES
:
3511 if (e
->ts
.type
== BT_CHARACTER
)
3512 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
3516 gfc_internal_error ("resolve_operator(): Bad intrinsic");
3519 /* Deal with arrayness of an operand through an operator. */
3523 switch (e
->value
.op
.op
)
3525 case INTRINSIC_PLUS
:
3526 case INTRINSIC_MINUS
:
3527 case INTRINSIC_TIMES
:
3528 case INTRINSIC_DIVIDE
:
3529 case INTRINSIC_POWER
:
3530 case INTRINSIC_CONCAT
:
3534 case INTRINSIC_NEQV
:
3536 case INTRINSIC_EQ_OS
:
3538 case INTRINSIC_NE_OS
:
3540 case INTRINSIC_GT_OS
:
3542 case INTRINSIC_GE_OS
:
3544 case INTRINSIC_LT_OS
:
3546 case INTRINSIC_LE_OS
:
3548 if (op1
->rank
== 0 && op2
->rank
== 0)
3551 if (op1
->rank
== 0 && op2
->rank
!= 0)
3553 e
->rank
= op2
->rank
;
3555 if (e
->shape
== NULL
)
3556 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
3559 if (op1
->rank
!= 0 && op2
->rank
== 0)
3561 e
->rank
= op1
->rank
;
3563 if (e
->shape
== NULL
)
3564 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3567 if (op1
->rank
!= 0 && op2
->rank
!= 0)
3569 if (op1
->rank
== op2
->rank
)
3571 e
->rank
= op1
->rank
;
3572 if (e
->shape
== NULL
)
3574 t
= compare_shapes(op1
, op2
);
3578 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3583 /* Allow higher level expressions to work. */
3586 /* Try user-defined operators, and otherwise throw an error. */
3587 dual_locus_error
= true;
3589 _("Inconsistent ranks for operator at %%L and %%L"));
3596 case INTRINSIC_PARENTHESES
:
3598 case INTRINSIC_UPLUS
:
3599 case INTRINSIC_UMINUS
:
3600 /* Simply copy arrayness attribute */
3601 e
->rank
= op1
->rank
;
3603 if (e
->shape
== NULL
)
3604 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3612 /* Attempt to simplify the expression. */
3615 t
= gfc_simplify_expr (e
, 0);
3616 /* Some calls do not succeed in simplification and return FAILURE
3617 even though there is no error; e.g. variable references to
3618 PARAMETER arrays. */
3619 if (!gfc_is_constant_expr (e
))
3628 if (gfc_extend_expr (e
, &real_error
) == SUCCESS
)
3635 if (dual_locus_error
)
3636 gfc_error (msg
, &op1
->where
, &op2
->where
);
3638 gfc_error (msg
, &e
->where
);
3644 /************** Array resolution subroutines **************/
3647 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
}
3650 /* Compare two integer expressions. */
3653 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
3657 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
3658 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
3661 /* If either of the types isn't INTEGER, we must have
3662 raised an error earlier. */
3664 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
3667 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
3677 /* Compare an integer expression with an integer. */
3680 compare_bound_int (gfc_expr
*a
, int b
)
3684 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
3687 if (a
->ts
.type
!= BT_INTEGER
)
3688 gfc_internal_error ("compare_bound_int(): Bad expression");
3690 i
= mpz_cmp_si (a
->value
.integer
, b
);
3700 /* Compare an integer expression with a mpz_t. */
3703 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
3707 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
3710 if (a
->ts
.type
!= BT_INTEGER
)
3711 gfc_internal_error ("compare_bound_int(): Bad expression");
3713 i
= mpz_cmp (a
->value
.integer
, b
);
3723 /* Compute the last value of a sequence given by a triplet.
3724 Return 0 if it wasn't able to compute the last value, or if the
3725 sequence if empty, and 1 otherwise. */
3728 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
3729 gfc_expr
*stride
, mpz_t last
)
3733 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
3734 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
3735 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
3738 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
3739 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
3742 if (stride
== NULL
|| compare_bound_int(stride
, 1) == CMP_EQ
)
3744 if (compare_bound (start
, end
) == CMP_GT
)
3746 mpz_set (last
, end
->value
.integer
);
3750 if (compare_bound_int (stride
, 0) == CMP_GT
)
3752 /* Stride is positive */
3753 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
3758 /* Stride is negative */
3759 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
3764 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
3765 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
3766 mpz_sub (last
, end
->value
.integer
, rem
);
3773 /* Compare a single dimension of an array reference to the array
3777 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
3781 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
3783 gcc_assert (ar
->stride
[i
] == NULL
);
3784 /* This implies [*] as [*:] and [*:3] are not possible. */
3785 if (ar
->start
[i
] == NULL
)
3787 gcc_assert (ar
->end
[i
] == NULL
);
3792 /* Given start, end and stride values, calculate the minimum and
3793 maximum referenced indexes. */
3795 switch (ar
->dimen_type
[i
])
3802 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
3805 gfc_warning ("Array reference at %L is out of bounds "
3806 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3807 mpz_get_si (ar
->start
[i
]->value
.integer
),
3808 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3810 gfc_warning ("Array reference at %L is out of bounds "
3811 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
3812 mpz_get_si (ar
->start
[i
]->value
.integer
),
3813 mpz_get_si (as
->lower
[i
]->value
.integer
),
3817 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
3820 gfc_warning ("Array reference at %L is out of bounds "
3821 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3822 mpz_get_si (ar
->start
[i
]->value
.integer
),
3823 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3825 gfc_warning ("Array reference at %L is out of bounds "
3826 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
3827 mpz_get_si (ar
->start
[i
]->value
.integer
),
3828 mpz_get_si (as
->upper
[i
]->value
.integer
),
3837 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
3838 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
3840 comparison comp_start_end
= compare_bound (AR_START
, AR_END
);
3842 /* Check for zero stride, which is not allowed. */
3843 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
3845 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
3849 /* if start == len || (stride > 0 && start < len)
3850 || (stride < 0 && start > len),
3851 then the array section contains at least one element. In this
3852 case, there is an out-of-bounds access if
3853 (start < lower || start > upper). */
3854 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
3855 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
3856 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
3857 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
3858 && comp_start_end
== CMP_GT
))
3860 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
3862 gfc_warning ("Lower array reference at %L is out of bounds "
3863 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3864 mpz_get_si (AR_START
->value
.integer
),
3865 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3868 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
3870 gfc_warning ("Lower array reference at %L is out of bounds "
3871 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3872 mpz_get_si (AR_START
->value
.integer
),
3873 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3878 /* If we can compute the highest index of the array section,
3879 then it also has to be between lower and upper. */
3880 mpz_init (last_value
);
3881 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
3884 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
3886 gfc_warning ("Upper array reference at %L is out of bounds "
3887 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
3888 mpz_get_si (last_value
),
3889 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
3890 mpz_clear (last_value
);
3893 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
3895 gfc_warning ("Upper array reference at %L is out of bounds "
3896 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
3897 mpz_get_si (last_value
),
3898 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
3899 mpz_clear (last_value
);
3903 mpz_clear (last_value
);
3911 gfc_internal_error ("check_dimension(): Bad array reference");
3918 /* Compare an array reference with an array specification. */
3921 compare_spec_to_ref (gfc_array_ref
*ar
)
3928 /* TODO: Full array sections are only allowed as actual parameters. */
3929 if (as
->type
== AS_ASSUMED_SIZE
3930 && (/*ar->type == AR_FULL
3931 ||*/ (ar
->type
== AR_SECTION
3932 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
3934 gfc_error ("Rightmost upper bound of assumed size array section "
3935 "not specified at %L", &ar
->where
);
3939 if (ar
->type
== AR_FULL
)
3942 if (as
->rank
!= ar
->dimen
)
3944 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
3945 &ar
->where
, ar
->dimen
, as
->rank
);
3949 /* ar->codimen == 0 is a local array. */
3950 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
3952 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
3953 &ar
->where
, ar
->codimen
, as
->corank
);
3957 for (i
= 0; i
< as
->rank
; i
++)
3958 if (check_dimension (i
, ar
, as
) == FAILURE
)
3961 /* Local access has no coarray spec. */
3962 if (ar
->codimen
!= 0)
3963 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
3965 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
)
3967 gfc_error ("Coindex of codimension %d must be a scalar at %L",
3968 i
+ 1 - as
->rank
, &ar
->where
);
3971 if (check_dimension (i
, ar
, as
) == FAILURE
)
3979 /* Resolve one part of an array index. */
3982 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
3983 int force_index_integer_kind
)
3990 if (gfc_resolve_expr (index
) == FAILURE
)
3993 if (check_scalar
&& index
->rank
!= 0)
3995 gfc_error ("Array index at %L must be scalar", &index
->where
);
3999 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4001 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4002 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4006 if (index
->ts
.type
== BT_REAL
)
4007 if (gfc_notify_std (GFC_STD_LEGACY
, "Extension: REAL array index at %L",
4008 &index
->where
) == FAILURE
)
4011 if ((index
->ts
.kind
!= gfc_index_integer_kind
4012 && force_index_integer_kind
)
4013 || index
->ts
.type
!= BT_INTEGER
)
4016 ts
.type
= BT_INTEGER
;
4017 ts
.kind
= gfc_index_integer_kind
;
4019 gfc_convert_type_warn (index
, &ts
, 2, 0);
4025 /* Resolve one part of an array index. */
4028 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4030 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4033 /* Resolve a dim argument to an intrinsic function. */
4036 gfc_resolve_dim_arg (gfc_expr
*dim
)
4041 if (gfc_resolve_expr (dim
) == FAILURE
)
4046 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4051 if (dim
->ts
.type
!= BT_INTEGER
)
4053 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4057 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4062 ts
.type
= BT_INTEGER
;
4063 ts
.kind
= gfc_index_integer_kind
;
4065 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4071 /* Given an expression that contains array references, update those array
4072 references to point to the right array specifications. While this is
4073 filled in during matching, this information is difficult to save and load
4074 in a module, so we take care of it here.
4076 The idea here is that the original array reference comes from the
4077 base symbol. We traverse the list of reference structures, setting
4078 the stored reference to references. Component references can
4079 provide an additional array specification. */
4082 find_array_spec (gfc_expr
*e
)
4086 gfc_symbol
*derived
;
4089 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4090 as
= e
->symtree
->n
.sym
->ts
.u
.derived
->components
->as
;
4092 as
= e
->symtree
->n
.sym
->as
;
4095 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4100 gfc_internal_error ("find_array_spec(): Missing spec");
4107 if (derived
== NULL
)
4108 derived
= e
->symtree
->n
.sym
->ts
.u
.derived
;
4110 if (derived
->attr
.is_class
)
4111 derived
= derived
->components
->ts
.u
.derived
;
4113 c
= derived
->components
;
4115 for (; c
; c
= c
->next
)
4116 if (c
== ref
->u
.c
.component
)
4118 /* Track the sequence of component references. */
4119 if (c
->ts
.type
== BT_DERIVED
)
4120 derived
= c
->ts
.u
.derived
;
4125 gfc_internal_error ("find_array_spec(): Component not found");
4127 if (c
->attr
.dimension
)
4130 gfc_internal_error ("find_array_spec(): unused as(1)");
4141 gfc_internal_error ("find_array_spec(): unused as(2)");
4145 /* Resolve an array reference. */
4148 resolve_array_ref (gfc_array_ref
*ar
)
4150 int i
, check_scalar
;
4153 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4155 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4157 /* Do not force gfc_index_integer_kind for the start. We can
4158 do fine with any integer kind. This avoids temporary arrays
4159 created for indexing with a vector. */
4160 if (gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0) == FAILURE
)
4162 if (gfc_resolve_index (ar
->end
[i
], check_scalar
) == FAILURE
)
4164 if (gfc_resolve_index (ar
->stride
[i
], check_scalar
) == FAILURE
)
4169 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4173 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4177 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4178 if (e
->expr_type
== EXPR_VARIABLE
4179 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4180 ar
->start
[i
] = gfc_get_parentheses (e
);
4184 gfc_error ("Array index at %L is an array of rank %d",
4185 &ar
->c_where
[i
], e
->rank
);
4190 if (ar
->type
== AR_FULL
&& ar
->as
->rank
== 0)
4191 ar
->type
= AR_ELEMENT
;
4193 /* If the reference type is unknown, figure out what kind it is. */
4195 if (ar
->type
== AR_UNKNOWN
)
4197 ar
->type
= AR_ELEMENT
;
4198 for (i
= 0; i
< ar
->dimen
; i
++)
4199 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4200 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4202 ar
->type
= AR_SECTION
;
4207 if (!ar
->as
->cray_pointee
&& compare_spec_to_ref (ar
) == FAILURE
)
4215 resolve_substring (gfc_ref
*ref
)
4217 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4219 if (ref
->u
.ss
.start
!= NULL
)
4221 if (gfc_resolve_expr (ref
->u
.ss
.start
) == FAILURE
)
4224 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4226 gfc_error ("Substring start index at %L must be of type INTEGER",
4227 &ref
->u
.ss
.start
->where
);
4231 if (ref
->u
.ss
.start
->rank
!= 0)
4233 gfc_error ("Substring start index at %L must be scalar",
4234 &ref
->u
.ss
.start
->where
);
4238 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4239 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4240 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4242 gfc_error ("Substring start index at %L is less than one",
4243 &ref
->u
.ss
.start
->where
);
4248 if (ref
->u
.ss
.end
!= NULL
)
4250 if (gfc_resolve_expr (ref
->u
.ss
.end
) == FAILURE
)
4253 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4255 gfc_error ("Substring end index at %L must be of type INTEGER",
4256 &ref
->u
.ss
.end
->where
);
4260 if (ref
->u
.ss
.end
->rank
!= 0)
4262 gfc_error ("Substring end index at %L must be scalar",
4263 &ref
->u
.ss
.end
->where
);
4267 if (ref
->u
.ss
.length
!= NULL
4268 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4269 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4270 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4272 gfc_error ("Substring end index at %L exceeds the string length",
4273 &ref
->u
.ss
.start
->where
);
4277 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4278 gfc_integer_kinds
[k
].huge
) == CMP_GT
4279 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4280 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4282 gfc_error ("Substring end index at %L is too large",
4283 &ref
->u
.ss
.end
->where
);
4292 /* This function supplies missing substring charlens. */
4295 gfc_resolve_substring_charlen (gfc_expr
*e
)
4298 gfc_expr
*start
, *end
;
4300 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4301 if (char_ref
->type
== REF_SUBSTRING
)
4307 gcc_assert (char_ref
->next
== NULL
);
4311 if (e
->ts
.u
.cl
->length
)
4312 gfc_free_expr (e
->ts
.u
.cl
->length
);
4313 else if (e
->expr_type
== EXPR_VARIABLE
4314 && e
->symtree
->n
.sym
->attr
.dummy
)
4318 e
->ts
.type
= BT_CHARACTER
;
4319 e
->ts
.kind
= gfc_default_character_kind
;
4322 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4324 if (char_ref
->u
.ss
.start
)
4325 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4327 start
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
4329 if (char_ref
->u
.ss
.end
)
4330 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4331 else if (e
->expr_type
== EXPR_VARIABLE
)
4332 end
= gfc_copy_expr (e
->symtree
->n
.sym
->ts
.u
.cl
->length
);
4339 /* Length = (end - start +1). */
4340 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4341 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4342 gfc_get_int_expr (gfc_default_integer_kind
,
4345 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4346 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4348 /* Make sure that the length is simplified. */
4349 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4350 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4354 /* Resolve subtype references. */
4357 resolve_ref (gfc_expr
*expr
)
4359 int current_part_dimension
, n_components
, seen_part_dimension
;
4362 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4363 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4365 find_array_spec (expr
);
4369 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4373 if (resolve_array_ref (&ref
->u
.ar
) == FAILURE
)
4381 resolve_substring (ref
);
4385 /* Check constraints on part references. */
4387 current_part_dimension
= 0;
4388 seen_part_dimension
= 0;
4391 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4396 switch (ref
->u
.ar
.type
)
4399 /* Coarray scalar. */
4400 if (ref
->u
.ar
.as
->rank
== 0)
4402 current_part_dimension
= 0;
4407 current_part_dimension
= 1;
4411 current_part_dimension
= 0;
4415 gfc_internal_error ("resolve_ref(): Bad array reference");
4421 if (current_part_dimension
|| seen_part_dimension
)
4424 if (ref
->u
.c
.component
->attr
.pointer
4425 || ref
->u
.c
.component
->attr
.proc_pointer
)
4427 gfc_error ("Component to the right of a part reference "
4428 "with nonzero rank must not have the POINTER "
4429 "attribute at %L", &expr
->where
);
4432 else if (ref
->u
.c
.component
->attr
.allocatable
)
4434 gfc_error ("Component to the right of a part reference "
4435 "with nonzero rank must not have the ALLOCATABLE "
4436 "attribute at %L", &expr
->where
);
4448 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
4449 || ref
->next
== NULL
)
4450 && current_part_dimension
4451 && seen_part_dimension
)
4453 gfc_error ("Two or more part references with nonzero rank must "
4454 "not be specified at %L", &expr
->where
);
4458 if (ref
->type
== REF_COMPONENT
)
4460 if (current_part_dimension
)
4461 seen_part_dimension
= 1;
4463 /* reset to make sure */
4464 current_part_dimension
= 0;
4472 /* Given an expression, determine its shape. This is easier than it sounds.
4473 Leaves the shape array NULL if it is not possible to determine the shape. */
4476 expression_shape (gfc_expr
*e
)
4478 mpz_t array
[GFC_MAX_DIMENSIONS
];
4481 if (e
->rank
== 0 || e
->shape
!= NULL
)
4484 for (i
= 0; i
< e
->rank
; i
++)
4485 if (gfc_array_dimen_size (e
, i
, &array
[i
]) == FAILURE
)
4488 e
->shape
= gfc_get_shape (e
->rank
);
4490 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
4495 for (i
--; i
>= 0; i
--)
4496 mpz_clear (array
[i
]);
4500 /* Given a variable expression node, compute the rank of the expression by
4501 examining the base symbol and any reference structures it may have. */
4504 expression_rank (gfc_expr
*e
)
4509 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
4510 could lead to serious confusion... */
4511 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
4515 if (e
->expr_type
== EXPR_ARRAY
)
4517 /* Constructors can have a rank different from one via RESHAPE(). */
4519 if (e
->symtree
== NULL
)
4525 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
4526 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
4532 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4534 if (ref
->type
!= REF_ARRAY
)
4537 if (ref
->u
.ar
.type
== AR_FULL
)
4539 rank
= ref
->u
.ar
.as
->rank
;
4543 if (ref
->u
.ar
.type
== AR_SECTION
)
4545 /* Figure out the rank of the section. */
4547 gfc_internal_error ("expression_rank(): Two array specs");
4549 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
4550 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
4551 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
4561 expression_shape (e
);
4565 /* Resolve a variable expression. */
4568 resolve_variable (gfc_expr
*e
)
4575 if (e
->symtree
== NULL
)
4578 if (e
->ref
&& resolve_ref (e
) == FAILURE
)
4581 sym
= e
->symtree
->n
.sym
;
4582 if (sym
->attr
.flavor
== FL_PROCEDURE
4583 && (!sym
->attr
.function
4584 || (sym
->attr
.function
&& sym
->result
4585 && sym
->result
->attr
.proc_pointer
4586 && !sym
->result
->attr
.function
)))
4588 e
->ts
.type
= BT_PROCEDURE
;
4589 goto resolve_procedure
;
4592 if (sym
->ts
.type
!= BT_UNKNOWN
)
4593 gfc_variable_attr (e
, &e
->ts
);
4596 /* Must be a simple variable reference. */
4597 if (gfc_set_default_type (sym
, 1, sym
->ns
) == FAILURE
)
4602 if (check_assumed_size_reference (sym
, e
))
4605 /* Deal with forward references to entries during resolve_code, to
4606 satisfy, at least partially, 12.5.2.5. */
4607 if (gfc_current_ns
->entries
4608 && current_entry_id
== sym
->entry_id
4611 && cs_base
->current
->op
!= EXEC_ENTRY
)
4613 gfc_entry_list
*entry
;
4614 gfc_formal_arglist
*formal
;
4618 /* If the symbol is a dummy... */
4619 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
4621 entry
= gfc_current_ns
->entries
;
4624 /* ...test if the symbol is a parameter of previous entries. */
4625 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
4626 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
4628 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
4632 /* If it has not been seen as a dummy, this is an error. */
4635 if (specification_expr
)
4636 gfc_error ("Variable '%s', used in a specification expression"
4637 ", is referenced at %L before the ENTRY statement "
4638 "in which it is a parameter",
4639 sym
->name
, &cs_base
->current
->loc
);
4641 gfc_error ("Variable '%s' is used at %L before the ENTRY "
4642 "statement in which it is a parameter",
4643 sym
->name
, &cs_base
->current
->loc
);
4648 /* Now do the same check on the specification expressions. */
4649 specification_expr
= 1;
4650 if (sym
->ts
.type
== BT_CHARACTER
4651 && gfc_resolve_expr (sym
->ts
.u
.cl
->length
) == FAILURE
)
4655 for (n
= 0; n
< sym
->as
->rank
; n
++)
4657 specification_expr
= 1;
4658 if (gfc_resolve_expr (sym
->as
->lower
[n
]) == FAILURE
)
4660 specification_expr
= 1;
4661 if (gfc_resolve_expr (sym
->as
->upper
[n
]) == FAILURE
)
4664 specification_expr
= 0;
4667 /* Update the symbol's entry level. */
4668 sym
->entry_id
= current_entry_id
+ 1;
4672 if (t
== SUCCESS
&& resolve_procedure_expression (e
) == FAILURE
)
4675 /* F2008, C617 and C1229. */
4676 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
4677 && gfc_is_coindexed (e
))
4679 gfc_ref
*ref
, *ref2
= NULL
;
4681 if (e
->ts
.type
== BT_CLASS
)
4683 gfc_error ("Polymorphic subobject of coindexed object at %L",
4688 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4690 if (ref
->type
== REF_COMPONENT
)
4692 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
4696 for ( ; ref
; ref
= ref
->next
)
4697 if (ref
->type
== REF_COMPONENT
)
4700 /* Expression itself is coindexed object. */
4704 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
4705 for ( ; c
; c
= c
->next
)
4706 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
4708 gfc_error ("Coindexed object with polymorphic allocatable "
4709 "subcomponent at %L", &e
->where
);
4720 /* Checks to see that the correct symbol has been host associated.
4721 The only situation where this arises is that in which a twice
4722 contained function is parsed after the host association is made.
4723 Therefore, on detecting this, change the symbol in the expression
4724 and convert the array reference into an actual arglist if the old
4725 symbol is a variable. */
4727 check_host_association (gfc_expr
*e
)
4729 gfc_symbol
*sym
, *old_sym
;
4733 gfc_actual_arglist
*arg
, *tail
= NULL
;
4734 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
4736 /* If the expression is the result of substitution in
4737 interface.c(gfc_extend_expr) because there is no way in
4738 which the host association can be wrong. */
4739 if (e
->symtree
== NULL
4740 || e
->symtree
->n
.sym
== NULL
4741 || e
->user_operator
)
4744 old_sym
= e
->symtree
->n
.sym
;
4746 if (gfc_current_ns
->parent
4747 && old_sym
->ns
!= gfc_current_ns
)
4749 /* Use the 'USE' name so that renamed module symbols are
4750 correctly handled. */
4751 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
4753 if (sym
&& old_sym
!= sym
4754 && sym
->ts
.type
== old_sym
->ts
.type
4755 && sym
->attr
.flavor
== FL_PROCEDURE
4756 && sym
->attr
.contained
)
4758 /* Clear the shape, since it might not be valid. */
4759 if (e
->shape
!= NULL
)
4761 for (n
= 0; n
< e
->rank
; n
++)
4762 mpz_clear (e
->shape
[n
]);
4764 gfc_free (e
->shape
);
4767 /* Give the expression the right symtree! */
4768 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
4769 gcc_assert (st
!= NULL
);
4771 if (old_sym
->attr
.flavor
== FL_PROCEDURE
4772 || e
->expr_type
== EXPR_FUNCTION
)
4774 /* Original was function so point to the new symbol, since
4775 the actual argument list is already attached to the
4777 e
->value
.function
.esym
= NULL
;
4782 /* Original was variable so convert array references into
4783 an actual arglist. This does not need any checking now
4784 since gfc_resolve_function will take care of it. */
4785 e
->value
.function
.actual
= NULL
;
4786 e
->expr_type
= EXPR_FUNCTION
;
4789 /* Ambiguity will not arise if the array reference is not
4790 the last reference. */
4791 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4792 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
4795 gcc_assert (ref
->type
== REF_ARRAY
);
4797 /* Grab the start expressions from the array ref and
4798 copy them into actual arguments. */
4799 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
4801 arg
= gfc_get_actual_arglist ();
4802 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
4803 if (e
->value
.function
.actual
== NULL
)
4804 tail
= e
->value
.function
.actual
= arg
;
4812 /* Dump the reference list and set the rank. */
4813 gfc_free_ref_list (e
->ref
);
4815 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
4818 gfc_resolve_expr (e
);
4822 /* This might have changed! */
4823 return e
->expr_type
== EXPR_FUNCTION
;
4828 gfc_resolve_character_operator (gfc_expr
*e
)
4830 gfc_expr
*op1
= e
->value
.op
.op1
;
4831 gfc_expr
*op2
= e
->value
.op
.op2
;
4832 gfc_expr
*e1
= NULL
;
4833 gfc_expr
*e2
= NULL
;
4835 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
4837 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
4838 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
4839 else if (op1
->expr_type
== EXPR_CONSTANT
)
4840 e1
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
4841 op1
->value
.character
.length
);
4843 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
4844 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
4845 else if (op2
->expr_type
== EXPR_CONSTANT
)
4846 e2
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
4847 op2
->value
.character
.length
);
4849 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4854 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
4855 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4856 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4857 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
4858 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4864 /* Ensure that an character expression has a charlen and, if possible, a
4865 length expression. */
4868 fixup_charlen (gfc_expr
*e
)
4870 /* The cases fall through so that changes in expression type and the need
4871 for multiple fixes are picked up. In all circumstances, a charlen should
4872 be available for the middle end to hang a backend_decl on. */
4873 switch (e
->expr_type
)
4876 gfc_resolve_character_operator (e
);
4879 if (e
->expr_type
== EXPR_ARRAY
)
4880 gfc_resolve_character_array_constructor (e
);
4882 case EXPR_SUBSTRING
:
4883 if (!e
->ts
.u
.cl
&& e
->ref
)
4884 gfc_resolve_substring_charlen (e
);
4888 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4895 /* Update an actual argument to include the passed-object for type-bound
4896 procedures at the right position. */
4898 static gfc_actual_arglist
*
4899 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
4902 gcc_assert (argpos
> 0);
4906 gfc_actual_arglist
* result
;
4908 result
= gfc_get_actual_arglist ();
4912 result
->name
= name
;
4918 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
4920 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
4925 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
4928 extract_compcall_passed_object (gfc_expr
* e
)
4932 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
4934 if (e
->value
.compcall
.base_object
)
4935 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
4938 po
= gfc_get_expr ();
4939 po
->expr_type
= EXPR_VARIABLE
;
4940 po
->symtree
= e
->symtree
;
4941 po
->ref
= gfc_copy_ref (e
->ref
);
4942 po
->where
= e
->where
;
4945 if (gfc_resolve_expr (po
) == FAILURE
)
4952 /* Update the arglist of an EXPR_COMPCALL expression to include the
4956 update_compcall_arglist (gfc_expr
* e
)
4959 gfc_typebound_proc
* tbp
;
4961 tbp
= e
->value
.compcall
.tbp
;
4966 po
= extract_compcall_passed_object (e
);
4970 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
4976 gcc_assert (tbp
->pass_arg_num
> 0);
4977 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
4985 /* Extract the passed object from a PPC call (a copy of it). */
4988 extract_ppc_passed_object (gfc_expr
*e
)
4993 po
= gfc_get_expr ();
4994 po
->expr_type
= EXPR_VARIABLE
;
4995 po
->symtree
= e
->symtree
;
4996 po
->ref
= gfc_copy_ref (e
->ref
);
4997 po
->where
= e
->where
;
4999 /* Remove PPC reference. */
5001 while ((*ref
)->next
)
5002 ref
= &(*ref
)->next
;
5003 gfc_free_ref_list (*ref
);
5006 if (gfc_resolve_expr (po
) == FAILURE
)
5013 /* Update the actual arglist of a procedure pointer component to include the
5017 update_ppc_arglist (gfc_expr
* e
)
5021 gfc_typebound_proc
* tb
;
5023 if (!gfc_is_proc_ptr_comp (e
, &ppc
))
5030 else if (tb
->nopass
)
5033 po
= extract_ppc_passed_object (e
);
5039 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5043 gcc_assert (tb
->pass_arg_num
> 0);
5044 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5052 /* Check that the object a TBP is called on is valid, i.e. it must not be
5053 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5056 check_typebound_baseobject (gfc_expr
* e
)
5060 base
= extract_compcall_passed_object (e
);
5064 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5066 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5068 gfc_error ("Base object for type-bound procedure call at %L is of"
5069 " ABSTRACT type '%s'", &e
->where
, base
->ts
.u
.derived
->name
);
5073 /* If the procedure called is NOPASS, the base object must be scalar. */
5074 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
> 0)
5076 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5077 " be scalar", &e
->where
);
5081 /* FIXME: Remove once PR 41177 (this problem) is fixed completely. */
5084 gfc_error ("Non-scalar base object at %L currently not implemented",
5093 /* Resolve a call to a type-bound procedure, either function or subroutine,
5094 statically from the data in an EXPR_COMPCALL expression. The adapted
5095 arglist and the target-procedure symtree are returned. */
5098 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5099 gfc_actual_arglist
** actual
)
5101 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5102 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5104 /* Update the actual arglist for PASS. */
5105 if (update_compcall_arglist (e
) == FAILURE
)
5108 *actual
= e
->value
.compcall
.actual
;
5109 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5111 gfc_free_ref_list (e
->ref
);
5113 e
->value
.compcall
.actual
= NULL
;
5119 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
5120 which of the specific bindings (if any) matches the arglist and transform
5121 the expression into a call of that binding. */
5124 resolve_typebound_generic_call (gfc_expr
* e
)
5126 gfc_typebound_proc
* genproc
;
5127 const char* genname
;
5129 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5130 genname
= e
->value
.compcall
.name
;
5131 genproc
= e
->value
.compcall
.tbp
;
5133 if (!genproc
->is_generic
)
5136 /* Try the bindings on this type and in the inheritance hierarchy. */
5137 for (; genproc
; genproc
= genproc
->overridden
)
5141 gcc_assert (genproc
->is_generic
);
5142 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
5145 gfc_actual_arglist
* args
;
5148 gcc_assert (g
->specific
);
5150 if (g
->specific
->error
)
5153 target
= g
->specific
->u
.specific
->n
.sym
;
5155 /* Get the right arglist by handling PASS/NOPASS. */
5156 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
5157 if (!g
->specific
->nopass
)
5160 po
= extract_compcall_passed_object (e
);
5164 gcc_assert (g
->specific
->pass_arg_num
> 0);
5165 gcc_assert (!g
->specific
->error
);
5166 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
5167 g
->specific
->pass_arg
);
5169 resolve_actual_arglist (args
, target
->attr
.proc
,
5170 is_external_proc (target
) && !target
->formal
);
5172 /* Check if this arglist matches the formal. */
5173 matches
= gfc_arglist_matches_symbol (&args
, target
);
5175 /* Clean up and break out of the loop if we've found it. */
5176 gfc_free_actual_arglist (args
);
5179 e
->value
.compcall
.tbp
= g
->specific
;
5185 /* Nothing matching found! */
5186 gfc_error ("Found no matching specific binding for the call to the GENERIC"
5187 " '%s' at %L", genname
, &e
->where
);
5195 /* Resolve a call to a type-bound subroutine. */
5198 resolve_typebound_call (gfc_code
* c
)
5200 gfc_actual_arglist
* newactual
;
5201 gfc_symtree
* target
;
5203 /* Check that's really a SUBROUTINE. */
5204 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
5206 gfc_error ("'%s' at %L should be a SUBROUTINE",
5207 c
->expr1
->value
.compcall
.name
, &c
->loc
);
5211 if (check_typebound_baseobject (c
->expr1
) == FAILURE
)
5214 if (resolve_typebound_generic_call (c
->expr1
) == FAILURE
)
5217 /* Transform into an ordinary EXEC_CALL for now. */
5219 if (resolve_typebound_static (c
->expr1
, &target
, &newactual
) == FAILURE
)
5222 c
->ext
.actual
= newactual
;
5223 c
->symtree
= target
;
5224 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
5226 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
5228 gfc_free_expr (c
->expr1
);
5229 c
->expr1
= gfc_get_expr ();
5230 c
->expr1
->expr_type
= EXPR_FUNCTION
;
5231 c
->expr1
->symtree
= target
;
5232 c
->expr1
->where
= c
->loc
;
5234 return resolve_call (c
);
5238 /* Resolve a component-call expression. This originally was intended
5239 only to see functions. However, it is convenient to use it in
5240 resolving subroutine class methods, since we do not have to add a
5241 gfc_code each time. */
5243 resolve_compcall (gfc_expr
* e
, bool fcn
, bool class_members
)
5245 gfc_actual_arglist
* newactual
;
5246 gfc_symtree
* target
;
5248 /* Check that's really a FUNCTION. */
5249 if (fcn
&& !e
->value
.compcall
.tbp
->function
)
5251 gfc_error ("'%s' at %L should be a FUNCTION",
5252 e
->value
.compcall
.name
, &e
->where
);
5255 else if (!fcn
&& !e
->value
.compcall
.tbp
->subroutine
)
5257 /* To resolve class member calls, we borrow this bit
5258 of code to select the specific procedures. */
5259 gfc_error ("'%s' at %L should be a SUBROUTINE",
5260 e
->value
.compcall
.name
, &e
->where
);
5264 /* These must not be assign-calls! */
5265 gcc_assert (!e
->value
.compcall
.assign
);
5267 if (check_typebound_baseobject (e
) == FAILURE
)
5270 if (resolve_typebound_generic_call (e
) == FAILURE
)
5272 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5274 /* Take the rank from the function's symbol. */
5275 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
5276 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
5278 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
5279 arglist to the TBP's binding target. */
5281 if (resolve_typebound_static (e
, &target
, &newactual
) == FAILURE
)
5284 e
->value
.function
.actual
= newactual
;
5285 e
->value
.function
.name
= NULL
;
5286 e
->value
.function
.esym
= target
->n
.sym
;
5287 e
->value
.function
.class_esym
= NULL
;
5288 e
->value
.function
.isym
= NULL
;
5289 e
->symtree
= target
;
5290 e
->ts
= target
->n
.sym
->ts
;
5291 e
->expr_type
= EXPR_FUNCTION
;
5293 /* Resolution is not necessary when constructing component calls
5294 for class members, since this must only be done for the
5295 declared type, which is done afterwards. */
5296 return !class_members
? gfc_resolve_expr (e
) : SUCCESS
;
5300 /* Resolve a typebound call for the members in a class. This group of
5301 functions implements dynamic dispatch in the provisional version
5302 of f03 OOP. As soon as vtables are in place and contain pointers
5303 to methods, this will no longer be necessary. */
5304 static gfc_expr
*list_e
;
5305 static gfc_try
check_class_members (gfc_symbol
*);
5306 static gfc_try class_try
;
5307 static bool fcn_flag
;
5311 check_members (gfc_symbol
*derived
)
5313 if (derived
->attr
.flavor
== FL_DERIVED
)
5314 (void) check_class_members (derived
);
5319 check_class_members (gfc_symbol
*derived
)
5323 gfc_class_esym_list
*etmp
;
5325 e
= gfc_copy_expr (list_e
);
5327 tbp
= gfc_find_typebound_proc (derived
, &class_try
,
5328 e
->value
.compcall
.name
,
5333 gfc_error ("no typebound available procedure named '%s' at %L",
5334 e
->value
.compcall
.name
, &e
->where
);
5338 /* If we have to match a passed class member, force the actual
5339 expression to have the correct type. */
5340 if (!tbp
->n
.tb
->nopass
)
5342 if (e
->value
.compcall
.base_object
== NULL
)
5343 e
->value
.compcall
.base_object
= extract_compcall_passed_object (e
);
5345 if (e
->value
.compcall
.base_object
== NULL
)
5348 if (!derived
->attr
.abstract
)
5350 e
->value
.compcall
.base_object
->ts
.type
= BT_DERIVED
;
5351 e
->value
.compcall
.base_object
->ts
.u
.derived
= derived
;
5355 e
->value
.compcall
.tbp
= tbp
->n
.tb
;
5356 e
->value
.compcall
.name
= tbp
->name
;
5358 /* Let the original expresssion catch the assertion in
5359 resolve_compcall, since this flag does not appear to be reset or
5360 copied in some systems. */
5361 e
->value
.compcall
.assign
= 0;
5363 /* Do the renaming, PASSing, generic => specific and other
5364 good things for each class member. */
5365 class_try
= (resolve_compcall (e
, fcn_flag
, true) == SUCCESS
)
5366 ? class_try
: FAILURE
;
5368 /* Now transfer the found symbol to the esym list. */
5369 if (class_try
== SUCCESS
)
5371 etmp
= list_e
->value
.function
.class_esym
;
5372 list_e
->value
.function
.class_esym
5373 = gfc_get_class_esym_list();
5374 list_e
->value
.function
.class_esym
->next
= etmp
;
5375 list_e
->value
.function
.class_esym
->derived
= derived
;
5376 list_e
->value
.function
.class_esym
->esym
5377 = e
->value
.function
.esym
;
5382 /* Burrow down into grandchildren types. */
5383 if (derived
->f2k_derived
)
5384 gfc_traverse_ns (derived
->f2k_derived
, check_members
);
5390 /* Eliminate esym_lists where all the members point to the
5391 typebound procedure of the declared type; ie. one where
5392 type selection has no effect.. */
5394 resolve_class_esym (gfc_expr
*e
)
5396 gfc_class_esym_list
*p
, *q
;
5399 gcc_assert (e
&& e
->expr_type
== EXPR_FUNCTION
);
5401 p
= e
->value
.function
.class_esym
;
5405 for (; p
; p
= p
->next
)
5406 empty
= empty
&& (e
->value
.function
.esym
== p
->esym
);
5410 p
= e
->value
.function
.class_esym
;
5416 e
->value
.function
.class_esym
= NULL
;
5421 /* Generate an expression for the hash value, given the reference to
5422 the class of the final expression (class_ref), the base of the
5423 full reference list (new_ref), the declared type and the class
5426 hash_value_expr (gfc_ref
*class_ref
, gfc_ref
*new_ref
, gfc_symtree
*st
)
5428 gfc_expr
*hash_value
;
5430 /* Build an expression for the correct hash_value; ie. that of the last
5434 class_ref
->next
= NULL
;
5438 gfc_free_ref_list (new_ref
);
5441 hash_value
= gfc_get_expr ();
5442 hash_value
->expr_type
= EXPR_VARIABLE
;
5443 hash_value
->symtree
= st
;
5444 hash_value
->symtree
->n
.sym
->refs
++;
5445 hash_value
->ref
= new_ref
;
5446 gfc_add_component_ref (hash_value
, "$vptr");
5447 gfc_add_component_ref (hash_value
, "$hash");
5453 /* Get the ultimate declared type from an expression. In addition,
5454 return the last class/derived type reference and the copy of the
5457 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
5460 gfc_symbol
*declared
;
5465 *new_ref
= gfc_copy_ref (e
->ref
);
5466 for (ref
= *new_ref
; ref
; ref
= ref
->next
)
5468 if (ref
->type
!= REF_COMPONENT
)
5471 if (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5472 || ref
->u
.c
.component
->ts
.type
== BT_DERIVED
)
5474 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
5479 if (declared
== NULL
)
5480 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
5486 /* Resolve the argument expressions so that any arguments expressions
5487 that include class methods are resolved before the current call.
5488 This is necessary because of the static variables used in CLASS
5489 method resolution. */
5491 resolve_arg_exprs (gfc_actual_arglist
*arg
)
5493 /* Resolve the actual arglist expressions. */
5494 for (; arg
; arg
= arg
->next
)
5497 gfc_resolve_expr (arg
->expr
);
5502 /* Resolve a typebound function, or 'method'. First separate all
5503 the non-CLASS references by calling resolve_compcall directly.
5504 Then treat the CLASS references by resolving for each of the class
5508 resolve_typebound_function (gfc_expr
* e
)
5510 gfc_symbol
*derived
, *declared
;
5517 return resolve_compcall (e
, true, false);
5519 /* Get the CLASS declared type. */
5520 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
);
5522 /* Weed out cases of the ultimate component being a derived type. */
5523 if ((class_ref
&& class_ref
->u
.c
.component
->ts
.type
== BT_DERIVED
)
5524 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
5526 gfc_free_ref_list (new_ref
);
5527 return resolve_compcall (e
, true, false);
5530 /* Resolve the argument expressions, */
5531 resolve_arg_exprs (e
->value
.function
.actual
);
5533 /* Get the data component, which is of the declared type. */
5534 derived
= declared
->components
->ts
.u
.derived
;
5536 /* Resolve the function call for each member of the class. */
5537 class_try
= SUCCESS
;
5539 list_e
= gfc_copy_expr (e
);
5541 if (check_class_members (derived
) == FAILURE
)
5544 class_try
= (resolve_compcall (e
, true, false) == SUCCESS
)
5545 ? class_try
: FAILURE
;
5547 /* Transfer the class list to the original expression. Note that
5548 the class_esym list is cleaned up in trans-expr.c, as the calls
5550 e
->value
.function
.class_esym
= list_e
->value
.function
.class_esym
;
5551 list_e
->value
.function
.class_esym
= NULL
;
5552 gfc_free_expr (list_e
);
5554 resolve_class_esym (e
);
5556 /* More than one typebound procedure so transmit an expression for
5557 the hash_value as the selector. */
5558 if (e
->value
.function
.class_esym
!= NULL
)
5559 e
->value
.function
.class_esym
->hash_value
5560 = hash_value_expr (class_ref
, new_ref
, st
);
5565 /* Resolve a typebound subroutine, or 'method'. First separate all
5566 the non-CLASS references by calling resolve_typebound_call directly.
5567 Then treat the CLASS references by resolving for each of the class
5571 resolve_typebound_subroutine (gfc_code
*code
)
5573 gfc_symbol
*derived
, *declared
;
5578 st
= code
->expr1
->symtree
;
5580 return resolve_typebound_call (code
);
5582 /* Get the CLASS declared type. */
5583 declared
= get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
);
5585 /* Weed out cases of the ultimate component being a derived type. */
5586 if ((class_ref
&& class_ref
->u
.c
.component
->ts
.type
== BT_DERIVED
)
5587 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
5589 gfc_free_ref_list (new_ref
);
5590 return resolve_typebound_call (code
);
5593 /* Resolve the argument expressions, */
5594 resolve_arg_exprs (code
->expr1
->value
.compcall
.actual
);
5596 /* Get the data component, which is of the declared type. */
5597 derived
= declared
->components
->ts
.u
.derived
;
5599 class_try
= SUCCESS
;
5601 list_e
= gfc_copy_expr (code
->expr1
);
5603 if (check_class_members (derived
) == FAILURE
)
5606 class_try
= (resolve_typebound_call (code
) == SUCCESS
)
5607 ? class_try
: FAILURE
;
5609 /* Transfer the class list to the original expression. Note that
5610 the class_esym list is cleaned up in trans-expr.c, as the calls
5612 code
->expr1
->value
.function
.class_esym
5613 = list_e
->value
.function
.class_esym
;
5614 list_e
->value
.function
.class_esym
= NULL
;
5615 gfc_free_expr (list_e
);
5617 resolve_class_esym (code
->expr1
);
5619 /* More than one typebound procedure so transmit an expression for
5620 the hash_value as the selector. */
5621 if (code
->expr1
->value
.function
.class_esym
!= NULL
)
5622 code
->expr1
->value
.function
.class_esym
->hash_value
5623 = hash_value_expr (class_ref
, new_ref
, st
);
5629 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
5632 resolve_ppc_call (gfc_code
* c
)
5634 gfc_component
*comp
;
5637 b
= gfc_is_proc_ptr_comp (c
->expr1
, &comp
);
5640 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
5641 c
->expr1
->expr_type
= EXPR_VARIABLE
;
5643 if (!comp
->attr
.subroutine
)
5644 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
5646 if (resolve_ref (c
->expr1
) == FAILURE
)
5649 if (update_ppc_arglist (c
->expr1
) == FAILURE
)
5652 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
5654 if (resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
5655 comp
->formal
== NULL
) == FAILURE
)
5658 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
5664 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
5667 resolve_expr_ppc (gfc_expr
* e
)
5669 gfc_component
*comp
;
5672 b
= gfc_is_proc_ptr_comp (e
, &comp
);
5675 /* Convert to EXPR_FUNCTION. */
5676 e
->expr_type
= EXPR_FUNCTION
;
5677 e
->value
.function
.isym
= NULL
;
5678 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
5680 if (comp
->as
!= NULL
)
5681 e
->rank
= comp
->as
->rank
;
5683 if (!comp
->attr
.function
)
5684 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
5686 if (resolve_ref (e
) == FAILURE
)
5689 if (resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
5690 comp
->formal
== NULL
) == FAILURE
)
5693 if (update_ppc_arglist (e
) == FAILURE
)
5696 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
5703 gfc_is_expandable_expr (gfc_expr
*e
)
5705 gfc_constructor
*con
;
5707 if (e
->expr_type
== EXPR_ARRAY
)
5709 /* Traverse the constructor looking for variables that are flavor
5710 parameter. Parameters must be expanded since they are fully used at
5712 con
= gfc_constructor_first (e
->value
.constructor
);
5713 for (; con
; con
= gfc_constructor_next (con
))
5715 if (con
->expr
->expr_type
== EXPR_VARIABLE
5716 && con
->expr
->symtree
5717 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
5718 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
5720 if (con
->expr
->expr_type
== EXPR_ARRAY
5721 && gfc_is_expandable_expr (con
->expr
))
5729 /* Resolve an expression. That is, make sure that types of operands agree
5730 with their operators, intrinsic operators are converted to function calls
5731 for overloaded types and unresolved function references are resolved. */
5734 gfc_resolve_expr (gfc_expr
*e
)
5742 /* inquiry_argument only applies to variables. */
5743 inquiry_save
= inquiry_argument
;
5744 if (e
->expr_type
!= EXPR_VARIABLE
)
5745 inquiry_argument
= false;
5747 switch (e
->expr_type
)
5750 t
= resolve_operator (e
);
5756 if (check_host_association (e
))
5757 t
= resolve_function (e
);
5760 t
= resolve_variable (e
);
5762 expression_rank (e
);
5765 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
5766 && e
->ref
->type
!= REF_SUBSTRING
)
5767 gfc_resolve_substring_charlen (e
);
5772 t
= resolve_typebound_function (e
);
5775 case EXPR_SUBSTRING
:
5776 t
= resolve_ref (e
);
5785 t
= resolve_expr_ppc (e
);
5790 if (resolve_ref (e
) == FAILURE
)
5793 t
= gfc_resolve_array_constructor (e
);
5794 /* Also try to expand a constructor. */
5797 expression_rank (e
);
5798 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
5799 gfc_expand_constructor (e
);
5802 /* This provides the opportunity for the length of constructors with
5803 character valued function elements to propagate the string length
5804 to the expression. */
5805 if (t
== SUCCESS
&& e
->ts
.type
== BT_CHARACTER
)
5807 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
5808 here rather then add a duplicate test for it above. */
5809 gfc_expand_constructor (e
);
5810 t
= gfc_resolve_character_array_constructor (e
);
5815 case EXPR_STRUCTURE
:
5816 t
= resolve_ref (e
);
5820 t
= resolve_structure_cons (e
);
5824 t
= gfc_simplify_expr (e
, 0);
5828 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
5831 if (e
->ts
.type
== BT_CHARACTER
&& t
== SUCCESS
&& !e
->ts
.u
.cl
)
5834 inquiry_argument
= inquiry_save
;
5840 /* Resolve an expression from an iterator. They must be scalar and have
5841 INTEGER or (optionally) REAL type. */
5844 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
5845 const char *name_msgid
)
5847 if (gfc_resolve_expr (expr
) == FAILURE
)
5850 if (expr
->rank
!= 0)
5852 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
5856 if (expr
->ts
.type
!= BT_INTEGER
)
5858 if (expr
->ts
.type
== BT_REAL
)
5861 return gfc_notify_std (GFC_STD_F95_DEL
,
5862 "Deleted feature: %s at %L must be integer",
5863 _(name_msgid
), &expr
->where
);
5866 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
5873 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
5881 /* Resolve the expressions in an iterator structure. If REAL_OK is
5882 false allow only INTEGER type iterators, otherwise allow REAL types. */
5885 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
)
5887 if (gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable")
5891 if (gfc_pure (NULL
) && gfc_impure_variable (iter
->var
->symtree
->n
.sym
))
5893 gfc_error ("Cannot assign to loop variable in PURE procedure at %L",
5898 if (gfc_resolve_iterator_expr (iter
->start
, real_ok
,
5899 "Start expression in DO loop") == FAILURE
)
5902 if (gfc_resolve_iterator_expr (iter
->end
, real_ok
,
5903 "End expression in DO loop") == FAILURE
)
5906 if (gfc_resolve_iterator_expr (iter
->step
, real_ok
,
5907 "Step expression in DO loop") == FAILURE
)
5910 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
5912 if ((iter
->step
->ts
.type
== BT_INTEGER
5913 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
5914 || (iter
->step
->ts
.type
== BT_REAL
5915 && mpfr_sgn (iter
->step
->value
.real
) == 0))
5917 gfc_error ("Step expression in DO loop at %L cannot be zero",
5918 &iter
->step
->where
);
5923 /* Convert start, end, and step to the same type as var. */
5924 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
5925 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
5926 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 2);
5928 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
5929 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
5930 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 2);
5932 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
5933 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
5934 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 2);
5936 if (iter
->start
->expr_type
== EXPR_CONSTANT
5937 && iter
->end
->expr_type
== EXPR_CONSTANT
5938 && iter
->step
->expr_type
== EXPR_CONSTANT
)
5941 if (iter
->start
->ts
.type
== BT_INTEGER
)
5943 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
5944 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
5948 sgn
= mpfr_sgn (iter
->step
->value
.real
);
5949 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
5951 if ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0))
5952 gfc_warning ("DO loop at %L will be executed zero times",
5953 &iter
->step
->where
);
5960 /* Traversal function for find_forall_index. f == 2 signals that
5961 that variable itself is not to be checked - only the references. */
5964 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
5966 if (expr
->expr_type
!= EXPR_VARIABLE
)
5969 /* A scalar assignment */
5970 if (!expr
->ref
|| *f
== 1)
5972 if (expr
->symtree
->n
.sym
== sym
)
5984 /* Check whether the FORALL index appears in the expression or not.
5985 Returns SUCCESS if SYM is found in EXPR. */
5988 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
5990 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
5997 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
5998 to be a scalar INTEGER variable. The subscripts and stride are scalar
5999 INTEGERs, and if stride is a constant it must be nonzero.
6000 Furthermore "A subscript or stride in a forall-triplet-spec shall
6001 not contain a reference to any index-name in the
6002 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6005 resolve_forall_iterators (gfc_forall_iterator
*it
)
6007 gfc_forall_iterator
*iter
, *iter2
;
6009 for (iter
= it
; iter
; iter
= iter
->next
)
6011 if (gfc_resolve_expr (iter
->var
) == SUCCESS
6012 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6013 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6016 if (gfc_resolve_expr (iter
->start
) == SUCCESS
6017 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
6018 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
6019 &iter
->start
->where
);
6020 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6021 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 2);
6023 if (gfc_resolve_expr (iter
->end
) == SUCCESS
6024 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6025 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6027 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
6028 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 2);
6030 if (gfc_resolve_expr (iter
->stride
) == SUCCESS
)
6032 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
6033 gfc_error ("FORALL stride expression at %L must be a scalar %s",
6034 &iter
->stride
->where
, "INTEGER");
6036 if (iter
->stride
->expr_type
== EXPR_CONSTANT
6037 && mpz_cmp_ui(iter
->stride
->value
.integer
, 0) == 0)
6038 gfc_error ("FORALL stride expression at %L cannot be zero",
6039 &iter
->stride
->where
);
6041 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
6042 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 2);
6045 for (iter
= it
; iter
; iter
= iter
->next
)
6046 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
6048 if (find_forall_index (iter2
->start
,
6049 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
6050 || find_forall_index (iter2
->end
,
6051 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
6052 || find_forall_index (iter2
->stride
,
6053 iter
->var
->symtree
->n
.sym
, 0) == SUCCESS
)
6054 gfc_error ("FORALL index '%s' may not appear in triplet "
6055 "specification at %L", iter
->var
->symtree
->name
,
6056 &iter2
->start
->where
);
6061 /* Given a pointer to a symbol that is a derived type, see if it's
6062 inaccessible, i.e. if it's defined in another module and the components are
6063 PRIVATE. The search is recursive if necessary. Returns zero if no
6064 inaccessible components are found, nonzero otherwise. */
6067 derived_inaccessible (gfc_symbol
*sym
)
6071 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
6074 for (c
= sym
->components
; c
; c
= c
->next
)
6076 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
6084 /* Resolve the argument of a deallocate expression. The expression must be
6085 a pointer or a full array. */
6088 resolve_deallocate_expr (gfc_expr
*e
)
6090 symbol_attribute attr
;
6091 int allocatable
, pointer
, check_intent_in
;
6096 /* Check INTENT(IN), unless the object is a sub-component of a pointer. */
6097 check_intent_in
= 1;
6099 if (gfc_resolve_expr (e
) == FAILURE
)
6102 if (e
->expr_type
!= EXPR_VARIABLE
)
6105 sym
= e
->symtree
->n
.sym
;
6107 if (sym
->ts
.type
== BT_CLASS
)
6109 allocatable
= sym
->ts
.u
.derived
->components
->attr
.allocatable
;
6110 pointer
= sym
->ts
.u
.derived
->components
->attr
.pointer
;
6114 allocatable
= sym
->attr
.allocatable
;
6115 pointer
= sym
->attr
.pointer
;
6117 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6120 check_intent_in
= 0;
6125 if (ref
->u
.ar
.type
!= AR_FULL
)
6130 c
= ref
->u
.c
.component
;
6131 if (c
->ts
.type
== BT_CLASS
)
6133 allocatable
= c
->ts
.u
.derived
->components
->attr
.allocatable
;
6134 pointer
= c
->ts
.u
.derived
->components
->attr
.pointer
;
6138 allocatable
= c
->attr
.allocatable
;
6139 pointer
= c
->attr
.pointer
;
6149 attr
= gfc_expr_attr (e
);
6151 if (allocatable
== 0 && attr
.pointer
== 0)
6154 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
6158 if (check_intent_in
&& sym
->attr
.intent
== INTENT_IN
)
6160 gfc_error ("Cannot deallocate INTENT(IN) variable '%s' at %L",
6161 sym
->name
, &e
->where
);
6165 if (e
->ts
.type
== BT_CLASS
)
6167 /* Only deallocate the DATA component. */
6168 gfc_add_component_ref (e
, "$data");
6175 /* Returns true if the expression e contains a reference to the symbol sym. */
6177 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
6179 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
6186 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
6188 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
6192 /* Given the expression node e for an allocatable/pointer of derived type to be
6193 allocated, get the expression node to be initialized afterwards (needed for
6194 derived types with default initializers, and derived types with allocatable
6195 components that need nullification.) */
6198 gfc_expr_to_initialize (gfc_expr
*e
)
6204 result
= gfc_copy_expr (e
);
6206 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
6207 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
6208 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
6210 ref
->u
.ar
.type
= AR_FULL
;
6212 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
6213 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
6215 result
->rank
= ref
->u
.ar
.dimen
;
6223 /* Used in resolve_allocate_expr to check that a allocation-object and
6224 a source-expr are conformable. This does not catch all possible
6225 cases; in particular a runtime checking is needed. */
6228 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
6230 /* First compare rank. */
6231 if (e2
->ref
&& e1
->rank
!= e2
->ref
->u
.ar
.as
->rank
)
6233 gfc_error ("Source-expr at %L must be scalar or have the "
6234 "same rank as the allocate-object at %L",
6235 &e1
->where
, &e2
->where
);
6246 for (i
= 0; i
< e1
->rank
; i
++)
6248 if (e2
->ref
->u
.ar
.end
[i
])
6250 mpz_set (s
, e2
->ref
->u
.ar
.end
[i
]->value
.integer
);
6251 mpz_sub (s
, s
, e2
->ref
->u
.ar
.start
[i
]->value
.integer
);
6252 mpz_add_ui (s
, s
, 1);
6256 mpz_set (s
, e2
->ref
->u
.ar
.start
[i
]->value
.integer
);
6259 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
6261 gfc_error ("Source-expr at %L and allocate-object at %L must "
6262 "have the same shape", &e1
->where
, &e2
->where
);
6275 /* Resolve the expression in an ALLOCATE statement, doing the additional
6276 checks to see whether the expression is OK or not. The expression must
6277 have a trailing array reference that gives the size of the array. */
6280 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
)
6282 int i
, pointer
, allocatable
, dimension
, check_intent_in
, is_abstract
;
6284 symbol_attribute attr
;
6285 gfc_ref
*ref
, *ref2
;
6292 /* Check INTENT(IN), unless the object is a sub-component of a pointer. */
6293 check_intent_in
= 1;
6295 /* Mark the ultimost array component as being in allocate to allow DIMEN_STAR
6296 checking of coarrays. */
6297 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6298 if (ref
->next
== NULL
)
6301 if (ref
&& ref
->type
== REF_ARRAY
)
6302 ref
->u
.ar
.in_allocate
= true;
6304 if (gfc_resolve_expr (e
) == FAILURE
)
6307 /* Make sure the expression is allocatable or a pointer. If it is
6308 pointer, the next-to-last reference must be a pointer. */
6312 sym
= e
->symtree
->n
.sym
;
6314 /* Check whether ultimate component is abstract and CLASS. */
6317 if (e
->expr_type
!= EXPR_VARIABLE
)
6320 attr
= gfc_expr_attr (e
);
6321 pointer
= attr
.pointer
;
6322 dimension
= attr
.dimension
;
6323 codimension
= attr
.codimension
;
6327 if (sym
->ts
.type
== BT_CLASS
)
6329 allocatable
= sym
->ts
.u
.derived
->components
->attr
.allocatable
;
6330 pointer
= sym
->ts
.u
.derived
->components
->attr
.pointer
;
6331 dimension
= sym
->ts
.u
.derived
->components
->attr
.dimension
;
6332 codimension
= sym
->ts
.u
.derived
->components
->attr
.codimension
;
6333 is_abstract
= sym
->ts
.u
.derived
->components
->attr
.abstract
;
6337 allocatable
= sym
->attr
.allocatable
;
6338 pointer
= sym
->attr
.pointer
;
6339 dimension
= sym
->attr
.dimension
;
6340 codimension
= sym
->attr
.codimension
;
6343 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
6346 check_intent_in
= 0;
6351 if (ref
->next
!= NULL
)
6357 if (gfc_is_coindexed (e
))
6359 gfc_error ("Coindexed allocatable object at %L",
6364 c
= ref
->u
.c
.component
;
6365 if (c
->ts
.type
== BT_CLASS
)
6367 allocatable
= c
->ts
.u
.derived
->components
->attr
.allocatable
;
6368 pointer
= c
->ts
.u
.derived
->components
->attr
.pointer
;
6369 dimension
= c
->ts
.u
.derived
->components
->attr
.dimension
;
6370 codimension
= c
->ts
.u
.derived
->components
->attr
.codimension
;
6371 is_abstract
= c
->ts
.u
.derived
->components
->attr
.abstract
;
6375 allocatable
= c
->attr
.allocatable
;
6376 pointer
= c
->attr
.pointer
;
6377 dimension
= c
->attr
.dimension
;
6378 codimension
= c
->attr
.codimension
;
6379 is_abstract
= c
->attr
.abstract
;
6391 if (allocatable
== 0 && pointer
== 0)
6393 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
6398 /* Some checks for the SOURCE tag. */
6401 /* Check F03:C631. */
6402 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
6404 gfc_error ("Type of entity at %L is type incompatible with "
6405 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
6409 /* Check F03:C632 and restriction following Note 6.18. */
6410 if (code
->expr3
->rank
> 0
6411 && conformable_arrays (code
->expr3
, e
) == FAILURE
)
6414 /* Check F03:C633. */
6415 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
)
6417 gfc_error ("The allocate-object at %L and the source-expr at %L "
6418 "shall have the same kind type parameter",
6419 &e
->where
, &code
->expr3
->where
);
6423 else if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
)
6425 gcc_assert (e
->ts
.type
== BT_CLASS
);
6426 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
6427 "type-spec or SOURCE=", sym
->name
, &e
->where
);
6431 if (check_intent_in
&& sym
->attr
.intent
== INTENT_IN
)
6433 gfc_error ("Cannot allocate INTENT(IN) variable '%s' at %L",
6434 sym
->name
, &e
->where
);
6440 /* Add default initializer for those derived types that need them. */
6441 if (e
->ts
.type
== BT_DERIVED
6442 && (init_e
= gfc_default_initializer (&e
->ts
)))
6444 gfc_code
*init_st
= gfc_get_code ();
6445 init_st
->loc
= code
->loc
;
6446 init_st
->op
= EXEC_INIT_ASSIGN
;
6447 init_st
->expr1
= gfc_expr_to_initialize (e
);
6448 init_st
->expr2
= init_e
;
6449 init_st
->next
= code
->next
;
6450 code
->next
= init_st
;
6452 else if (e
->ts
.type
== BT_CLASS
6453 && ((code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
6454 && (init_e
= gfc_default_initializer (&e
->ts
.u
.derived
->components
->ts
)))
6455 || (code
->ext
.alloc
.ts
.type
== BT_DERIVED
6456 && (init_e
= gfc_default_initializer (&code
->ext
.alloc
.ts
)))))
6458 gfc_code
*init_st
= gfc_get_code ();
6459 init_st
->loc
= code
->loc
;
6460 init_st
->op
= EXEC_INIT_ASSIGN
;
6461 init_st
->expr1
= gfc_expr_to_initialize (e
);
6462 init_st
->expr2
= init_e
;
6463 init_st
->next
= code
->next
;
6464 code
->next
= init_st
;
6468 if (pointer
|| (dimension
== 0 && codimension
== 0))
6471 /* Make sure the next-to-last reference node is an array specification. */
6473 if (ref2
== NULL
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
6474 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
6476 gfc_error ("Array specification required in ALLOCATE statement "
6477 "at %L", &e
->where
);
6481 /* Make sure that the array section reference makes sense in the
6482 context of an ALLOCATE specification. */
6486 if (codimension
&& ar
->codimen
== 0)
6488 gfc_error ("Coarray specification required in ALLOCATE statement "
6489 "at %L", &e
->where
);
6493 for (i
= 0; i
< ar
->dimen
; i
++)
6495 if (ref2
->u
.ar
.type
== AR_ELEMENT
)
6498 switch (ar
->dimen_type
[i
])
6504 if (ar
->start
[i
] != NULL
6505 && ar
->end
[i
] != NULL
6506 && ar
->stride
[i
] == NULL
)
6509 /* Fall Through... */
6514 gfc_error ("Bad array specification in ALLOCATE statement at %L",
6520 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
6522 sym
= a
->expr
->symtree
->n
.sym
;
6524 /* TODO - check derived type components. */
6525 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
6528 if ((ar
->start
[i
] != NULL
6529 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
6530 || (ar
->end
[i
] != NULL
6531 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
6533 gfc_error ("'%s' must not appear in the array specification at "
6534 "%L in the same ALLOCATE statement where it is "
6535 "itself allocated", sym
->name
, &ar
->where
);
6541 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
6543 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
6544 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
6546 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
6548 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
6549 "statement at %L", &e
->where
);
6555 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
6556 && ar
->stride
[i
] == NULL
)
6559 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
6564 if (codimension
&& ar
->as
->rank
== 0)
6566 gfc_error ("Sorry, allocatable scalar coarrays are not yet supported "
6567 "at %L", &e
->where
);
6579 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
6581 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
6582 gfc_alloc
*a
, *p
, *q
;
6584 stat
= code
->expr1
? code
->expr1
: NULL
;
6586 errmsg
= code
->expr2
? code
->expr2
: NULL
;
6588 /* Check the stat variable. */
6591 if (stat
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
6592 gfc_error ("Stat-variable '%s' at %L cannot be INTENT(IN)",
6593 stat
->symtree
->n
.sym
->name
, &stat
->where
);
6595 if (gfc_pure (NULL
) && gfc_impure_variable (stat
->symtree
->n
.sym
))
6596 gfc_error ("Illegal stat-variable at %L for a PURE procedure",
6599 if ((stat
->ts
.type
!= BT_INTEGER
6600 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
6601 || stat
->ref
->type
== REF_COMPONENT
)))
6603 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
6604 "variable", &stat
->where
);
6606 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
6607 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
6608 gfc_error ("Stat-variable at %L shall not be %sd within "
6609 "the same %s statement", &stat
->where
, fcn
, fcn
);
6612 /* Check the errmsg variable. */
6616 gfc_warning ("ERRMSG at %L is useless without a STAT tag",
6619 if (errmsg
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
6620 gfc_error ("Errmsg-variable '%s' at %L cannot be INTENT(IN)",
6621 errmsg
->symtree
->n
.sym
->name
, &errmsg
->where
);
6623 if (gfc_pure (NULL
) && gfc_impure_variable (errmsg
->symtree
->n
.sym
))
6624 gfc_error ("Illegal errmsg-variable at %L for a PURE procedure",
6627 if ((errmsg
->ts
.type
!= BT_CHARACTER
6629 && (errmsg
->ref
->type
== REF_ARRAY
6630 || errmsg
->ref
->type
== REF_COMPONENT
)))
6631 || errmsg
->rank
> 0 )
6632 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
6633 "variable", &errmsg
->where
);
6635 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
6636 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
6637 gfc_error ("Errmsg-variable at %L shall not be %sd within "
6638 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
6641 /* Check that an allocate-object appears only once in the statement.
6642 FIXME: Checking derived types is disabled. */
6643 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
6646 if ((pe
->ref
&& pe
->ref
->type
!= REF_COMPONENT
)
6647 && (pe
->symtree
->n
.sym
->ts
.type
!= BT_DERIVED
))
6649 for (q
= p
->next
; q
; q
= q
->next
)
6652 if ((qe
->ref
&& qe
->ref
->type
!= REF_COMPONENT
)
6653 && (qe
->symtree
->n
.sym
->ts
.type
!= BT_DERIVED
)
6654 && (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
))
6655 gfc_error ("Allocate-object at %L also appears at %L",
6656 &pe
->where
, &qe
->where
);
6661 if (strcmp (fcn
, "ALLOCATE") == 0)
6663 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
6664 resolve_allocate_expr (a
->expr
, code
);
6668 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
6669 resolve_deallocate_expr (a
->expr
);
6674 /************ SELECT CASE resolution subroutines ************/
6676 /* Callback function for our mergesort variant. Determines interval
6677 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
6678 op1 > op2. Assumes we're not dealing with the default case.
6679 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
6680 There are nine situations to check. */
6683 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
6687 if (op1
->low
== NULL
) /* op1 = (:L) */
6689 /* op2 = (:N), so overlap. */
6691 /* op2 = (M:) or (M:N), L < M */
6692 if (op2
->low
!= NULL
6693 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
6696 else if (op1
->high
== NULL
) /* op1 = (K:) */
6698 /* op2 = (M:), so overlap. */
6700 /* op2 = (:N) or (M:N), K > N */
6701 if (op2
->high
!= NULL
6702 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
6705 else /* op1 = (K:L) */
6707 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
6708 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
6710 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
6711 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
6713 else /* op2 = (M:N) */
6717 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
6720 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
6729 /* Merge-sort a double linked case list, detecting overlap in the
6730 process. LIST is the head of the double linked case list before it
6731 is sorted. Returns the head of the sorted list if we don't see any
6732 overlap, or NULL otherwise. */
6735 check_case_overlap (gfc_case
*list
)
6737 gfc_case
*p
, *q
, *e
, *tail
;
6738 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
6740 /* If the passed list was empty, return immediately. */
6747 /* Loop unconditionally. The only exit from this loop is a return
6748 statement, when we've finished sorting the case list. */
6755 /* Count the number of merges we do in this pass. */
6758 /* Loop while there exists a merge to be done. */
6763 /* Count this merge. */
6766 /* Cut the list in two pieces by stepping INSIZE places
6767 forward in the list, starting from P. */
6770 for (i
= 0; i
< insize
; i
++)
6779 /* Now we have two lists. Merge them! */
6780 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
6782 /* See from which the next case to merge comes from. */
6785 /* P is empty so the next case must come from Q. */
6790 else if (qsize
== 0 || q
== NULL
)
6799 cmp
= compare_cases (p
, q
);
6802 /* The whole case range for P is less than the
6810 /* The whole case range for Q is greater than
6811 the case range for P. */
6818 /* The cases overlap, or they are the same
6819 element in the list. Either way, we must
6820 issue an error and get the next case from P. */
6821 /* FIXME: Sort P and Q by line number. */
6822 gfc_error ("CASE label at %L overlaps with CASE "
6823 "label at %L", &p
->where
, &q
->where
);
6831 /* Add the next element to the merged list. */
6840 /* P has now stepped INSIZE places along, and so has Q. So
6841 they're the same. */
6846 /* If we have done only one merge or none at all, we've
6847 finished sorting the cases. */
6856 /* Otherwise repeat, merging lists twice the size. */
6862 /* Check to see if an expression is suitable for use in a CASE statement.
6863 Makes sure that all case expressions are scalar constants of the same
6864 type. Return FAILURE if anything is wrong. */
6867 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
6869 if (e
== NULL
) return SUCCESS
;
6871 if (e
->ts
.type
!= case_expr
->ts
.type
)
6873 gfc_error ("Expression in CASE statement at %L must be of type %s",
6874 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
6878 /* C805 (R808) For a given case-construct, each case-value shall be of
6879 the same type as case-expr. For character type, length differences
6880 are allowed, but the kind type parameters shall be the same. */
6882 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
6884 gfc_error ("Expression in CASE statement at %L must be of kind %d",
6885 &e
->where
, case_expr
->ts
.kind
);
6889 /* Convert the case value kind to that of case expression kind, if needed.
6890 FIXME: Should a warning be issued? */
6891 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
6892 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
6896 gfc_error ("Expression in CASE statement at %L must be scalar",
6905 /* Given a completely parsed select statement, we:
6907 - Validate all expressions and code within the SELECT.
6908 - Make sure that the selection expression is not of the wrong type.
6909 - Make sure that no case ranges overlap.
6910 - Eliminate unreachable cases and unreachable code resulting from
6911 removing case labels.
6913 The standard does allow unreachable cases, e.g. CASE (5:3). But
6914 they are a hassle for code generation, and to prevent that, we just
6915 cut them out here. This is not necessary for overlapping cases
6916 because they are illegal and we never even try to generate code.
6918 We have the additional caveat that a SELECT construct could have
6919 been a computed GOTO in the source code. Fortunately we can fairly
6920 easily work around that here: The case_expr for a "real" SELECT CASE
6921 is in code->expr1, but for a computed GOTO it is in code->expr2. All
6922 we have to do is make sure that the case_expr is a scalar integer
6926 resolve_select (gfc_code
*code
)
6929 gfc_expr
*case_expr
;
6930 gfc_case
*cp
, *default_case
, *tail
, *head
;
6931 int seen_unreachable
;
6937 if (code
->expr1
== NULL
)
6939 /* This was actually a computed GOTO statement. */
6940 case_expr
= code
->expr2
;
6941 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
6942 gfc_error ("Selection expression in computed GOTO statement "
6943 "at %L must be a scalar integer expression",
6946 /* Further checking is not necessary because this SELECT was built
6947 by the compiler, so it should always be OK. Just move the
6948 case_expr from expr2 to expr so that we can handle computed
6949 GOTOs as normal SELECTs from here on. */
6950 code
->expr1
= code
->expr2
;
6955 case_expr
= code
->expr1
;
6957 type
= case_expr
->ts
.type
;
6958 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
6960 gfc_error ("Argument of SELECT statement at %L cannot be %s",
6961 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
6963 /* Punt. Going on here just produce more garbage error messages. */
6967 if (case_expr
->rank
!= 0)
6969 gfc_error ("Argument of SELECT statement at %L must be a scalar "
6970 "expression", &case_expr
->where
);
6976 /* PR 19168 has a long discussion concerning a mismatch of the kinds
6977 of the SELECT CASE expression and its CASE values. Walk the lists
6978 of case values, and if we find a mismatch, promote case_expr to
6979 the appropriate kind. */
6981 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
6983 for (body
= code
->block
; body
; body
= body
->block
)
6985 /* Walk the case label list. */
6986 for (cp
= body
->ext
.case_list
; cp
; cp
= cp
->next
)
6988 /* Intercept the DEFAULT case. It does not have a kind. */
6989 if (cp
->low
== NULL
&& cp
->high
== NULL
)
6992 /* Unreachable case ranges are discarded, so ignore. */
6993 if (cp
->low
!= NULL
&& cp
->high
!= NULL
6994 && cp
->low
!= cp
->high
6995 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
6998 /* FIXME: Should a warning be issued? */
7000 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
7001 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
7003 if (cp
->high
!= NULL
7004 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
7005 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
7010 /* Assume there is no DEFAULT case. */
7011 default_case
= NULL
;
7016 for (body
= code
->block
; body
; body
= body
->block
)
7018 /* Assume the CASE list is OK, and all CASE labels can be matched. */
7020 seen_unreachable
= 0;
7022 /* Walk the case label list, making sure that all case labels
7024 for (cp
= body
->ext
.case_list
; cp
; cp
= cp
->next
)
7026 /* Count the number of cases in the whole construct. */
7029 /* Intercept the DEFAULT case. */
7030 if (cp
->low
== NULL
&& cp
->high
== NULL
)
7032 if (default_case
!= NULL
)
7034 gfc_error ("The DEFAULT CASE at %L cannot be followed "
7035 "by a second DEFAULT CASE at %L",
7036 &default_case
->where
, &cp
->where
);
7047 /* Deal with single value cases and case ranges. Errors are
7048 issued from the validation function. */
7049 if(validate_case_label_expr (cp
->low
, case_expr
) != SUCCESS
7050 || validate_case_label_expr (cp
->high
, case_expr
) != SUCCESS
)
7056 if (type
== BT_LOGICAL
7057 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
7058 || cp
->low
!= cp
->high
))
7060 gfc_error ("Logical range in CASE statement at %L is not "
7061 "allowed", &cp
->low
->where
);
7066 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
7069 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
7070 if (value
& seen_logical
)
7072 gfc_error ("constant logical value in CASE statement "
7073 "is repeated at %L",
7078 seen_logical
|= value
;
7081 if (cp
->low
!= NULL
&& cp
->high
!= NULL
7082 && cp
->low
!= cp
->high
7083 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
7085 if (gfc_option
.warn_surprising
)
7086 gfc_warning ("Range specification at %L can never "
7087 "be matched", &cp
->where
);
7089 cp
->unreachable
= 1;
7090 seen_unreachable
= 1;
7094 /* If the case range can be matched, it can also overlap with
7095 other cases. To make sure it does not, we put it in a
7096 double linked list here. We sort that with a merge sort
7097 later on to detect any overlapping cases. */
7101 head
->right
= head
->left
= NULL
;
7106 tail
->right
->left
= tail
;
7113 /* It there was a failure in the previous case label, give up
7114 for this case label list. Continue with the next block. */
7118 /* See if any case labels that are unreachable have been seen.
7119 If so, we eliminate them. This is a bit of a kludge because
7120 the case lists for a single case statement (label) is a
7121 single forward linked lists. */
7122 if (seen_unreachable
)
7124 /* Advance until the first case in the list is reachable. */
7125 while (body
->ext
.case_list
!= NULL
7126 && body
->ext
.case_list
->unreachable
)
7128 gfc_case
*n
= body
->ext
.case_list
;
7129 body
->ext
.case_list
= body
->ext
.case_list
->next
;
7131 gfc_free_case_list (n
);
7134 /* Strip all other unreachable cases. */
7135 if (body
->ext
.case_list
)
7137 for (cp
= body
->ext
.case_list
; cp
->next
; cp
= cp
->next
)
7139 if (cp
->next
->unreachable
)
7141 gfc_case
*n
= cp
->next
;
7142 cp
->next
= cp
->next
->next
;
7144 gfc_free_case_list (n
);
7151 /* See if there were overlapping cases. If the check returns NULL,
7152 there was overlap. In that case we don't do anything. If head
7153 is non-NULL, we prepend the DEFAULT case. The sorted list can
7154 then used during code generation for SELECT CASE constructs with
7155 a case expression of a CHARACTER type. */
7158 head
= check_case_overlap (head
);
7160 /* Prepend the default_case if it is there. */
7161 if (head
!= NULL
&& default_case
)
7163 default_case
->left
= NULL
;
7164 default_case
->right
= head
;
7165 head
->left
= default_case
;
7169 /* Eliminate dead blocks that may be the result if we've seen
7170 unreachable case labels for a block. */
7171 for (body
= code
; body
&& body
->block
; body
= body
->block
)
7173 if (body
->block
->ext
.case_list
== NULL
)
7175 /* Cut the unreachable block from the code chain. */
7176 gfc_code
*c
= body
->block
;
7177 body
->block
= c
->block
;
7179 /* Kill the dead block, but not the blocks below it. */
7181 gfc_free_statements (c
);
7185 /* More than two cases is legal but insane for logical selects.
7186 Issue a warning for it. */
7187 if (gfc_option
.warn_surprising
&& type
== BT_LOGICAL
7189 gfc_warning ("Logical SELECT CASE block at %L has more that two cases",
7194 /* Check if a derived type is extensible. */
7197 gfc_type_is_extensible (gfc_symbol
*sym
)
7199 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
);
7203 /* Resolve a SELECT TYPE statement. */
7206 resolve_select_type (gfc_code
*code
)
7208 gfc_symbol
*selector_type
;
7209 gfc_code
*body
, *new_st
, *if_st
, *tail
;
7210 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
7213 char name
[GFC_MAX_SYMBOL_LEN
];
7221 selector_type
= code
->expr2
->ts
.u
.derived
->components
->ts
.u
.derived
;
7223 selector_type
= code
->expr1
->ts
.u
.derived
->components
->ts
.u
.derived
;
7225 /* Loop over TYPE IS / CLASS IS cases. */
7226 for (body
= code
->block
; body
; body
= body
->block
)
7228 c
= body
->ext
.case_list
;
7230 /* Check F03:C815. */
7231 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
7232 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
7234 gfc_error ("Derived type '%s' at %L must be extensible",
7235 c
->ts
.u
.derived
->name
, &c
->where
);
7240 /* Check F03:C816. */
7241 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
7242 && !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
))
7244 gfc_error ("Derived type '%s' at %L must be an extension of '%s'",
7245 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
7250 /* Intercept the DEFAULT case. */
7251 if (c
->ts
.type
== BT_UNKNOWN
)
7253 /* Check F03:C818. */
7256 gfc_error ("The DEFAULT CASE at %L cannot be followed "
7257 "by a second DEFAULT CASE at %L",
7258 &default_case
->ext
.case_list
->where
, &c
->where
);
7263 default_case
= body
;
7272 /* Insert assignment for selector variable. */
7273 new_st
= gfc_get_code ();
7274 new_st
->op
= EXEC_ASSIGN
;
7275 new_st
->expr1
= gfc_copy_expr (code
->expr1
);
7276 new_st
->expr2
= gfc_copy_expr (code
->expr2
);
7280 /* Put SELECT TYPE statement inside a BLOCK. */
7281 new_st
= gfc_get_code ();
7282 new_st
->op
= code
->op
;
7283 new_st
->expr1
= code
->expr1
;
7284 new_st
->expr2
= code
->expr2
;
7285 new_st
->block
= code
->block
;
7289 ns
->code
->next
= new_st
;
7290 code
->op
= EXEC_BLOCK
;
7291 code
->expr1
= code
->expr2
= NULL
;
7296 /* Transform to EXEC_SELECT. */
7297 code
->op
= EXEC_SELECT
;
7298 gfc_add_component_ref (code
->expr1
, "$vptr");
7299 gfc_add_component_ref (code
->expr1
, "$hash");
7301 /* Loop over TYPE IS / CLASS IS cases. */
7302 for (body
= code
->block
; body
; body
= body
->block
)
7304 c
= body
->ext
.case_list
;
7306 if (c
->ts
.type
== BT_DERIVED
)
7307 c
->low
= c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
7308 c
->ts
.u
.derived
->hash_value
);
7310 else if (c
->ts
.type
== BT_UNKNOWN
)
7313 /* Assign temporary to selector. */
7314 if (c
->ts
.type
== BT_CLASS
)
7315 sprintf (name
, "tmp$class$%s", c
->ts
.u
.derived
->name
);
7317 sprintf (name
, "tmp$type$%s", c
->ts
.u
.derived
->name
);
7318 st
= gfc_find_symtree (ns
->sym_root
, name
);
7319 new_st
= gfc_get_code ();
7320 new_st
->expr1
= gfc_get_variable_expr (st
);
7321 new_st
->expr2
= gfc_get_variable_expr (code
->expr1
->symtree
);
7322 if (c
->ts
.type
== BT_DERIVED
)
7324 new_st
->op
= EXEC_POINTER_ASSIGN
;
7325 gfc_add_component_ref (new_st
->expr2
, "$data");
7328 new_st
->op
= EXEC_POINTER_ASSIGN
;
7329 new_st
->next
= body
->next
;
7330 body
->next
= new_st
;
7333 /* Take out CLASS IS cases for separate treatment. */
7335 while (body
&& body
->block
)
7337 if (body
->block
->ext
.case_list
->ts
.type
== BT_CLASS
)
7339 /* Add to class_is list. */
7340 if (class_is
== NULL
)
7342 class_is
= body
->block
;
7347 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
7348 tail
->block
= body
->block
;
7351 /* Remove from EXEC_SELECT list. */
7352 body
->block
= body
->block
->block
;
7365 /* Add a default case to hold the CLASS IS cases. */
7366 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
7367 tail
->block
= gfc_get_code ();
7369 tail
->op
= EXEC_SELECT_TYPE
;
7370 tail
->ext
.case_list
= gfc_get_case ();
7371 tail
->ext
.case_list
->ts
.type
= BT_UNKNOWN
;
7373 default_case
= tail
;
7376 /* More than one CLASS IS block? */
7377 if (class_is
->block
)
7381 /* Sort CLASS IS blocks by extension level. */
7385 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
7388 /* F03:C817 (check for doubles). */
7389 if ((*c1
)->ext
.case_list
->ts
.u
.derived
->hash_value
7390 == c2
->ext
.case_list
->ts
.u
.derived
->hash_value
)
7392 gfc_error ("Double CLASS IS block in SELECT TYPE "
7393 "statement at %L", &c2
->ext
.case_list
->where
);
7396 if ((*c1
)->ext
.case_list
->ts
.u
.derived
->attr
.extension
7397 < c2
->ext
.case_list
->ts
.u
.derived
->attr
.extension
)
7400 (*c1
)->block
= c2
->block
;
7410 /* Generate IF chain. */
7411 if_st
= gfc_get_code ();
7412 if_st
->op
= EXEC_IF
;
7414 for (body
= class_is
; body
; body
= body
->block
)
7416 new_st
->block
= gfc_get_code ();
7417 new_st
= new_st
->block
;
7418 new_st
->op
= EXEC_IF
;
7419 /* Set up IF condition: Call _gfortran_is_extension_of. */
7420 new_st
->expr1
= gfc_get_expr ();
7421 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
7422 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
7423 new_st
->expr1
->ts
.kind
= 4;
7424 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
7425 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
7426 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
7427 /* Set up arguments. */
7428 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
7429 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (code
->expr1
->symtree
);
7430 gfc_add_component_ref (new_st
->expr1
->value
.function
.actual
->expr
, "$vptr");
7431 vtab
= gfc_find_derived_vtab (body
->ext
.case_list
->ts
.u
.derived
);
7432 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
7433 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
7434 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
7435 new_st
->next
= body
->next
;
7437 if (default_case
->next
)
7439 new_st
->block
= gfc_get_code ();
7440 new_st
= new_st
->block
;
7441 new_st
->op
= EXEC_IF
;
7442 new_st
->next
= default_case
->next
;
7445 /* Replace CLASS DEFAULT code by the IF chain. */
7446 default_case
->next
= if_st
;
7449 resolve_select (code
);
7454 /* Resolve a transfer statement. This is making sure that:
7455 -- a derived type being transferred has only non-pointer components
7456 -- a derived type being transferred doesn't have private components, unless
7457 it's being transferred from the module where the type was defined
7458 -- we're not trying to transfer a whole assumed size array. */
7461 resolve_transfer (gfc_code
*code
)
7470 if (exp
->expr_type
!= EXPR_VARIABLE
&& exp
->expr_type
!= EXPR_FUNCTION
)
7473 sym
= exp
->symtree
->n
.sym
;
7476 /* Go to actual component transferred. */
7477 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
7478 if (ref
->type
== REF_COMPONENT
)
7479 ts
= &ref
->u
.c
.component
->ts
;
7481 if (ts
->type
== BT_DERIVED
)
7483 /* Check that transferred derived type doesn't contain POINTER
7485 if (ts
->u
.derived
->attr
.pointer_comp
)
7487 gfc_error ("Data transfer element at %L cannot have "
7488 "POINTER components", &code
->loc
);
7492 if (ts
->u
.derived
->attr
.alloc_comp
)
7494 gfc_error ("Data transfer element at %L cannot have "
7495 "ALLOCATABLE components", &code
->loc
);
7499 if (derived_inaccessible (ts
->u
.derived
))
7501 gfc_error ("Data transfer element at %L cannot have "
7502 "PRIVATE components",&code
->loc
);
7507 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
7508 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
7510 gfc_error ("Data transfer element at %L cannot be a full reference to "
7511 "an assumed-size array", &code
->loc
);
7517 /*********** Toplevel code resolution subroutines ***********/
7519 /* Find the set of labels that are reachable from this block. We also
7520 record the last statement in each block. */
7523 find_reachable_labels (gfc_code
*block
)
7530 cs_base
->reachable_labels
= bitmap_obstack_alloc (&labels_obstack
);
7532 /* Collect labels in this block. We don't keep those corresponding
7533 to END {IF|SELECT}, these are checked in resolve_branch by going
7534 up through the code_stack. */
7535 for (c
= block
; c
; c
= c
->next
)
7537 if (c
->here
&& c
->op
!= EXEC_END_BLOCK
)
7538 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
7541 /* Merge with labels from parent block. */
7544 gcc_assert (cs_base
->prev
->reachable_labels
);
7545 bitmap_ior_into (cs_base
->reachable_labels
,
7546 cs_base
->prev
->reachable_labels
);
7552 resolve_sync (gfc_code
*code
)
7554 /* Check imageset. The * case matches expr1 == NULL. */
7557 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
7558 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
7559 "INTEGER expression", &code
->expr1
->where
);
7560 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
7561 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
7562 gfc_error ("Imageset argument at %L must between 1 and num_images()",
7563 &code
->expr1
->where
);
7564 else if (code
->expr1
->expr_type
== EXPR_ARRAY
7565 && gfc_simplify_expr (code
->expr1
, 0) == SUCCESS
)
7567 gfc_constructor
*cons
;
7568 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
7569 for (; cons
; cons
= gfc_constructor_next (cons
))
7570 if (cons
->expr
->expr_type
== EXPR_CONSTANT
7571 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
7572 gfc_error ("Imageset argument at %L must between 1 and "
7573 "num_images()", &cons
->expr
->where
);
7579 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
7580 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
7581 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
7582 &code
->expr2
->where
);
7586 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
7587 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
7588 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
7589 &code
->expr3
->where
);
7593 /* Given a branch to a label, see if the branch is conforming.
7594 The code node describes where the branch is located. */
7597 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
7604 /* Step one: is this a valid branching target? */
7606 if (label
->defined
== ST_LABEL_UNKNOWN
)
7608 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
7613 if (label
->defined
!= ST_LABEL_TARGET
)
7615 gfc_error ("Statement at %L is not a valid branch target statement "
7616 "for the branch statement at %L", &label
->where
, &code
->loc
);
7620 /* Step two: make sure this branch is not a branch to itself ;-) */
7622 if (code
->here
== label
)
7624 gfc_warning ("Branch at %L may result in an infinite loop", &code
->loc
);
7628 /* Step three: See if the label is in the same block as the
7629 branching statement. The hard work has been done by setting up
7630 the bitmap reachable_labels. */
7632 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
7634 /* Check now whether there is a CRITICAL construct; if so, check
7635 whether the label is still visible outside of the CRITICAL block,
7636 which is invalid. */
7637 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
7638 if (stack
->current
->op
== EXEC_CRITICAL
7639 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
7640 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
7641 " at %L", &code
->loc
, &label
->where
);
7646 /* Step four: If we haven't found the label in the bitmap, it may
7647 still be the label of the END of the enclosing block, in which
7648 case we find it by going up the code_stack. */
7650 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
7652 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
7654 if (stack
->current
->op
== EXEC_CRITICAL
)
7656 /* Note: A label at END CRITICAL does not leave the CRITICAL
7657 construct as END CRITICAL is still part of it. */
7658 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
7659 " at %L", &code
->loc
, &label
->where
);
7666 gcc_assert (stack
->current
->next
->op
== EXEC_END_BLOCK
);
7670 /* The label is not in an enclosing block, so illegal. This was
7671 allowed in Fortran 66, so we allow it as extension. No
7672 further checks are necessary in this case. */
7673 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
7674 "as the GOTO statement at %L", &label
->where
,
7680 /* Check whether EXPR1 has the same shape as EXPR2. */
7683 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
7685 mpz_t shape
[GFC_MAX_DIMENSIONS
];
7686 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
7687 gfc_try result
= FAILURE
;
7690 /* Compare the rank. */
7691 if (expr1
->rank
!= expr2
->rank
)
7694 /* Compare the size of each dimension. */
7695 for (i
=0; i
<expr1
->rank
; i
++)
7697 if (gfc_array_dimen_size (expr1
, i
, &shape
[i
]) == FAILURE
)
7700 if (gfc_array_dimen_size (expr2
, i
, &shape2
[i
]) == FAILURE
)
7703 if (mpz_cmp (shape
[i
], shape2
[i
]))
7707 /* When either of the two expression is an assumed size array, we
7708 ignore the comparison of dimension sizes. */
7713 for (i
--; i
>= 0; i
--)
7715 mpz_clear (shape
[i
]);
7716 mpz_clear (shape2
[i
]);
7722 /* Check whether a WHERE assignment target or a WHERE mask expression
7723 has the same shape as the outmost WHERE mask expression. */
7726 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
7732 cblock
= code
->block
;
7734 /* Store the first WHERE mask-expr of the WHERE statement or construct.
7735 In case of nested WHERE, only the outmost one is stored. */
7736 if (mask
== NULL
) /* outmost WHERE */
7738 else /* inner WHERE */
7745 /* Check if the mask-expr has a consistent shape with the
7746 outmost WHERE mask-expr. */
7747 if (resolve_where_shape (cblock
->expr1
, e
) == FAILURE
)
7748 gfc_error ("WHERE mask at %L has inconsistent shape",
7749 &cblock
->expr1
->where
);
7752 /* the assignment statement of a WHERE statement, or the first
7753 statement in where-body-construct of a WHERE construct */
7754 cnext
= cblock
->next
;
7759 /* WHERE assignment statement */
7762 /* Check shape consistent for WHERE assignment target. */
7763 if (e
&& resolve_where_shape (cnext
->expr1
, e
) == FAILURE
)
7764 gfc_error ("WHERE assignment target at %L has "
7765 "inconsistent shape", &cnext
->expr1
->where
);
7769 case EXEC_ASSIGN_CALL
:
7770 resolve_call (cnext
);
7771 if (!cnext
->resolved_sym
->attr
.elemental
)
7772 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
7773 &cnext
->ext
.actual
->expr
->where
);
7776 /* WHERE or WHERE construct is part of a where-body-construct */
7778 resolve_where (cnext
, e
);
7782 gfc_error ("Unsupported statement inside WHERE at %L",
7785 /* the next statement within the same where-body-construct */
7786 cnext
= cnext
->next
;
7788 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
7789 cblock
= cblock
->block
;
7794 /* Resolve assignment in FORALL construct.
7795 NVAR is the number of FORALL index variables, and VAR_EXPR records the
7796 FORALL index variables. */
7799 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
7803 for (n
= 0; n
< nvar
; n
++)
7805 gfc_symbol
*forall_index
;
7807 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
7809 /* Check whether the assignment target is one of the FORALL index
7811 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
7812 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
7813 gfc_error ("Assignment to a FORALL index variable at %L",
7814 &code
->expr1
->where
);
7817 /* If one of the FORALL index variables doesn't appear in the
7818 assignment variable, then there could be a many-to-one
7819 assignment. Emit a warning rather than an error because the
7820 mask could be resolving this problem. */
7821 if (find_forall_index (code
->expr1
, forall_index
, 0) == FAILURE
)
7822 gfc_warning ("The FORALL with index '%s' is not used on the "
7823 "left side of the assignment at %L and so might "
7824 "cause multiple assignment to this object",
7825 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
7831 /* Resolve WHERE statement in FORALL construct. */
7834 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
7835 gfc_expr
**var_expr
)
7840 cblock
= code
->block
;
7843 /* the assignment statement of a WHERE statement, or the first
7844 statement in where-body-construct of a WHERE construct */
7845 cnext
= cblock
->next
;
7850 /* WHERE assignment statement */
7852 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
7855 /* WHERE operator assignment statement */
7856 case EXEC_ASSIGN_CALL
:
7857 resolve_call (cnext
);
7858 if (!cnext
->resolved_sym
->attr
.elemental
)
7859 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
7860 &cnext
->ext
.actual
->expr
->where
);
7863 /* WHERE or WHERE construct is part of a where-body-construct */
7865 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
7869 gfc_error ("Unsupported statement inside WHERE at %L",
7872 /* the next statement within the same where-body-construct */
7873 cnext
= cnext
->next
;
7875 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
7876 cblock
= cblock
->block
;
7881 /* Traverse the FORALL body to check whether the following errors exist:
7882 1. For assignment, check if a many-to-one assignment happens.
7883 2. For WHERE statement, check the WHERE body to see if there is any
7884 many-to-one assignment. */
7887 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
7891 c
= code
->block
->next
;
7897 case EXEC_POINTER_ASSIGN
:
7898 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
7901 case EXEC_ASSIGN_CALL
:
7905 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
7906 there is no need to handle it here. */
7910 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
7915 /* The next statement in the FORALL body. */
7921 /* Counts the number of iterators needed inside a forall construct, including
7922 nested forall constructs. This is used to allocate the needed memory
7923 in gfc_resolve_forall. */
7926 gfc_count_forall_iterators (gfc_code
*code
)
7928 int max_iters
, sub_iters
, current_iters
;
7929 gfc_forall_iterator
*fa
;
7931 gcc_assert(code
->op
== EXEC_FORALL
);
7935 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
7938 code
= code
->block
->next
;
7942 if (code
->op
== EXEC_FORALL
)
7944 sub_iters
= gfc_count_forall_iterators (code
);
7945 if (sub_iters
> max_iters
)
7946 max_iters
= sub_iters
;
7951 return current_iters
+ max_iters
;
7955 /* Given a FORALL construct, first resolve the FORALL iterator, then call
7956 gfc_resolve_forall_body to resolve the FORALL body. */
7959 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
7961 static gfc_expr
**var_expr
;
7962 static int total_var
= 0;
7963 static int nvar
= 0;
7965 gfc_forall_iterator
*fa
;
7970 /* Start to resolve a FORALL construct */
7971 if (forall_save
== 0)
7973 /* Count the total number of FORALL index in the nested FORALL
7974 construct in order to allocate the VAR_EXPR with proper size. */
7975 total_var
= gfc_count_forall_iterators (code
);
7977 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
7978 var_expr
= (gfc_expr
**) gfc_getmem (total_var
* sizeof (gfc_expr
*));
7981 /* The information about FORALL iterator, including FORALL index start, end
7982 and stride. The FORALL index can not appear in start, end or stride. */
7983 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
7985 /* Check if any outer FORALL index name is the same as the current
7987 for (i
= 0; i
< nvar
; i
++)
7989 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
7991 gfc_error ("An outer FORALL construct already has an index "
7992 "with this name %L", &fa
->var
->where
);
7996 /* Record the current FORALL index. */
7997 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
8001 /* No memory leak. */
8002 gcc_assert (nvar
<= total_var
);
8005 /* Resolve the FORALL body. */
8006 gfc_resolve_forall_body (code
, nvar
, var_expr
);
8008 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
8009 gfc_resolve_blocks (code
->block
, ns
);
8013 /* Free only the VAR_EXPRs allocated in this frame. */
8014 for (i
= nvar
; i
< tmp
; i
++)
8015 gfc_free_expr (var_expr
[i
]);
8019 /* We are in the outermost FORALL construct. */
8020 gcc_assert (forall_save
== 0);
8022 /* VAR_EXPR is not needed any more. */
8023 gfc_free (var_expr
);
8029 /* Resolve a BLOCK construct statement. */
8032 resolve_block_construct (gfc_code
* code
)
8034 /* Eventually, we may want to do some checks here or handle special stuff.
8035 But so far the only thing we can do is resolving the local namespace. */
8037 gfc_resolve (code
->ext
.ns
);
8041 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
8044 static void resolve_code (gfc_code
*, gfc_namespace
*);
8047 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
8051 for (; b
; b
= b
->block
)
8053 t
= gfc_resolve_expr (b
->expr1
);
8054 if (gfc_resolve_expr (b
->expr2
) == FAILURE
)
8060 if (t
== SUCCESS
&& b
->expr1
!= NULL
8061 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
8062 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
8069 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
8070 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
8075 resolve_branch (b
->label1
, b
);
8079 resolve_block_construct (b
);
8083 case EXEC_SELECT_TYPE
:
8094 case EXEC_OMP_ATOMIC
:
8095 case EXEC_OMP_CRITICAL
:
8097 case EXEC_OMP_MASTER
:
8098 case EXEC_OMP_ORDERED
:
8099 case EXEC_OMP_PARALLEL
:
8100 case EXEC_OMP_PARALLEL_DO
:
8101 case EXEC_OMP_PARALLEL_SECTIONS
:
8102 case EXEC_OMP_PARALLEL_WORKSHARE
:
8103 case EXEC_OMP_SECTIONS
:
8104 case EXEC_OMP_SINGLE
:
8106 case EXEC_OMP_TASKWAIT
:
8107 case EXEC_OMP_WORKSHARE
:
8111 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
8114 resolve_code (b
->next
, ns
);
8119 /* Does everything to resolve an ordinary assignment. Returns true
8120 if this is an interface assignment. */
8122 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
8132 if (gfc_extend_assign (code
, ns
) == SUCCESS
)
8136 if (code
->op
== EXEC_ASSIGN_CALL
)
8138 lhs
= code
->ext
.actual
->expr
;
8139 rhsptr
= &code
->ext
.actual
->next
->expr
;
8143 gfc_actual_arglist
* args
;
8144 gfc_typebound_proc
* tbp
;
8146 gcc_assert (code
->op
== EXEC_COMPCALL
);
8148 args
= code
->expr1
->value
.compcall
.actual
;
8150 rhsptr
= &args
->next
->expr
;
8152 tbp
= code
->expr1
->value
.compcall
.tbp
;
8153 gcc_assert (!tbp
->is_generic
);
8156 /* Make a temporary rhs when there is a default initializer
8157 and rhs is the same symbol as the lhs. */
8158 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
8159 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
8160 && has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
8161 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
8162 *rhsptr
= gfc_get_parentheses (*rhsptr
);
8171 && gfc_notify_std (GFC_STD_GNU
, "Extension: BOZ literal at %L outside "
8172 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
8173 &code
->loc
) == FAILURE
)
8176 /* Handle the case of a BOZ literal on the RHS. */
8177 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
8180 if (gfc_option
.warn_surprising
)
8181 gfc_warning ("BOZ literal at %L is bitwise transferred "
8182 "non-integer symbol '%s'", &code
->loc
,
8183 lhs
->symtree
->n
.sym
->name
);
8185 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
8187 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
8189 if (rc
== ARITH_UNDERFLOW
)
8190 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
8191 ". This check can be disabled with the option "
8192 "-fno-range-check", &rhs
->where
);
8193 else if (rc
== ARITH_OVERFLOW
)
8194 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
8195 ". This check can be disabled with the option "
8196 "-fno-range-check", &rhs
->where
);
8197 else if (rc
== ARITH_NAN
)
8198 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
8199 ". This check can be disabled with the option "
8200 "-fno-range-check", &rhs
->where
);
8206 if (lhs
->ts
.type
== BT_CHARACTER
8207 && gfc_option
.warn_character_truncation
)
8209 if (lhs
->ts
.u
.cl
!= NULL
8210 && lhs
->ts
.u
.cl
->length
!= NULL
8211 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8212 llen
= mpz_get_si (lhs
->ts
.u
.cl
->length
->value
.integer
);
8214 if (rhs
->expr_type
== EXPR_CONSTANT
)
8215 rlen
= rhs
->value
.character
.length
;
8217 else if (rhs
->ts
.u
.cl
!= NULL
8218 && rhs
->ts
.u
.cl
->length
!= NULL
8219 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8220 rlen
= mpz_get_si (rhs
->ts
.u
.cl
->length
->value
.integer
);
8222 if (rlen
&& llen
&& rlen
> llen
)
8223 gfc_warning_now ("CHARACTER expression will be truncated "
8224 "in assignment (%d/%d) at %L",
8225 llen
, rlen
, &code
->loc
);
8228 /* Ensure that a vector index expression for the lvalue is evaluated
8229 to a temporary if the lvalue symbol is referenced in it. */
8232 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
8233 if (ref
->type
== REF_ARRAY
)
8235 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
8236 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
8237 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
8238 ref
->u
.ar
.start
[n
]))
8240 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
8244 if (gfc_pure (NULL
))
8246 if (gfc_impure_variable (lhs
->symtree
->n
.sym
))
8248 gfc_error ("Cannot assign to variable '%s' in PURE "
8250 lhs
->symtree
->n
.sym
->name
,
8255 if (lhs
->ts
.type
== BT_DERIVED
8256 && lhs
->expr_type
== EXPR_VARIABLE
8257 && lhs
->ts
.u
.derived
->attr
.pointer_comp
8258 && rhs
->expr_type
== EXPR_VARIABLE
8259 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
8260 || gfc_is_coindexed (rhs
)))
8263 if (gfc_is_coindexed (rhs
))
8264 gfc_error ("Coindexed expression at %L is assigned to "
8265 "a derived type variable with a POINTER "
8266 "component in a PURE procedure",
8269 gfc_error ("The impure variable at %L is assigned to "
8270 "a derived type variable with a POINTER "
8271 "component in a PURE procedure (12.6)",
8276 /* Fortran 2008, C1283. */
8277 if (gfc_is_coindexed (lhs
))
8279 gfc_error ("Assignment to coindexed variable at %L in a PURE "
8280 "procedure", &rhs
->where
);
8286 /* FIXME: Valid in Fortran 2008, unless the LHS is both polymorphic
8287 and coindexed; cf. F2008, 7.2.1.2 and PR 43366. */
8288 if (lhs
->ts
.type
== BT_CLASS
)
8290 gfc_error ("Variable must not be polymorphic in assignment at %L",
8295 /* F2008, Section 7.2.1.2. */
8296 if (gfc_is_coindexed (lhs
) && gfc_has_ultimate_allocatable (lhs
))
8298 gfc_error ("Coindexed variable must not be have an allocatable ultimate "
8299 "component in assignment at %L", &lhs
->where
);
8303 gfc_check_assign (lhs
, rhs
, 1);
8308 /* Given a block of code, recursively resolve everything pointed to by this
8312 resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
8314 int omp_workshare_save
;
8319 frame
.prev
= cs_base
;
8323 find_reachable_labels (code
);
8325 for (; code
; code
= code
->next
)
8327 frame
.current
= code
;
8328 forall_save
= forall_flag
;
8330 if (code
->op
== EXEC_FORALL
)
8333 gfc_resolve_forall (code
, ns
, forall_save
);
8336 else if (code
->block
)
8338 omp_workshare_save
= -1;
8341 case EXEC_OMP_PARALLEL_WORKSHARE
:
8342 omp_workshare_save
= omp_workshare_flag
;
8343 omp_workshare_flag
= 1;
8344 gfc_resolve_omp_parallel_blocks (code
, ns
);
8346 case EXEC_OMP_PARALLEL
:
8347 case EXEC_OMP_PARALLEL_DO
:
8348 case EXEC_OMP_PARALLEL_SECTIONS
:
8350 omp_workshare_save
= omp_workshare_flag
;
8351 omp_workshare_flag
= 0;
8352 gfc_resolve_omp_parallel_blocks (code
, ns
);
8355 gfc_resolve_omp_do_blocks (code
, ns
);
8357 case EXEC_SELECT_TYPE
:
8358 gfc_current_ns
= code
->ext
.ns
;
8359 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
8360 gfc_current_ns
= ns
;
8362 case EXEC_OMP_WORKSHARE
:
8363 omp_workshare_save
= omp_workshare_flag
;
8364 omp_workshare_flag
= 1;
8367 gfc_resolve_blocks (code
->block
, ns
);
8371 if (omp_workshare_save
!= -1)
8372 omp_workshare_flag
= omp_workshare_save
;
8376 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
8377 t
= gfc_resolve_expr (code
->expr1
);
8378 forall_flag
= forall_save
;
8380 if (gfc_resolve_expr (code
->expr2
) == FAILURE
)
8383 if (code
->op
== EXEC_ALLOCATE
8384 && gfc_resolve_expr (code
->expr3
) == FAILURE
)
8390 case EXEC_END_BLOCK
:
8394 case EXEC_ERROR_STOP
:
8398 case EXEC_ASSIGN_CALL
:
8403 case EXEC_SYNC_IMAGES
:
8404 case EXEC_SYNC_MEMORY
:
8405 resolve_sync (code
);
8409 /* Keep track of which entry we are up to. */
8410 current_entry_id
= code
->ext
.entry
->id
;
8414 resolve_where (code
, NULL
);
8418 if (code
->expr1
!= NULL
)
8420 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
8421 gfc_error ("ASSIGNED GOTO statement at %L requires an "
8422 "INTEGER variable", &code
->expr1
->where
);
8423 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
8424 gfc_error ("Variable '%s' has not been assigned a target "
8425 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
8426 &code
->expr1
->where
);
8429 resolve_branch (code
->label1
, code
);
8433 if (code
->expr1
!= NULL
8434 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
8435 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
8436 "INTEGER return specifier", &code
->expr1
->where
);
8439 case EXEC_INIT_ASSIGN
:
8440 case EXEC_END_PROCEDURE
:
8447 if (resolve_ordinary_assign (code
, ns
))
8449 if (code
->op
== EXEC_COMPCALL
)
8456 case EXEC_LABEL_ASSIGN
:
8457 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
8458 gfc_error ("Label %d referenced at %L is never defined",
8459 code
->label1
->value
, &code
->label1
->where
);
8461 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
8462 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
8463 || code
->expr1
->symtree
->n
.sym
->ts
.kind
8464 != gfc_default_integer_kind
8465 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
8466 gfc_error ("ASSIGN statement at %L requires a scalar "
8467 "default INTEGER variable", &code
->expr1
->where
);
8470 case EXEC_POINTER_ASSIGN
:
8474 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
8477 case EXEC_ARITHMETIC_IF
:
8479 && code
->expr1
->ts
.type
!= BT_INTEGER
8480 && code
->expr1
->ts
.type
!= BT_REAL
)
8481 gfc_error ("Arithmetic IF statement at %L requires a numeric "
8482 "expression", &code
->expr1
->where
);
8484 resolve_branch (code
->label1
, code
);
8485 resolve_branch (code
->label2
, code
);
8486 resolve_branch (code
->label3
, code
);
8490 if (t
== SUCCESS
&& code
->expr1
!= NULL
8491 && (code
->expr1
->ts
.type
!= BT_LOGICAL
8492 || code
->expr1
->rank
!= 0))
8493 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
8494 &code
->expr1
->where
);
8499 resolve_call (code
);
8504 resolve_typebound_subroutine (code
);
8508 resolve_ppc_call (code
);
8512 /* Select is complicated. Also, a SELECT construct could be
8513 a transformed computed GOTO. */
8514 resolve_select (code
);
8517 case EXEC_SELECT_TYPE
:
8518 resolve_select_type (code
);
8522 gfc_resolve (code
->ext
.ns
);
8526 if (code
->ext
.iterator
!= NULL
)
8528 gfc_iterator
*iter
= code
->ext
.iterator
;
8529 if (gfc_resolve_iterator (iter
, true) != FAILURE
)
8530 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
);
8535 if (code
->expr1
== NULL
)
8536 gfc_internal_error ("resolve_code(): No expression on DO WHILE");
8538 && (code
->expr1
->rank
!= 0
8539 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
8540 gfc_error ("Exit condition of DO WHILE loop at %L must be "
8541 "a scalar LOGICAL expression", &code
->expr1
->where
);
8546 resolve_allocate_deallocate (code
, "ALLOCATE");
8550 case EXEC_DEALLOCATE
:
8552 resolve_allocate_deallocate (code
, "DEALLOCATE");
8557 if (gfc_resolve_open (code
->ext
.open
) == FAILURE
)
8560 resolve_branch (code
->ext
.open
->err
, code
);
8564 if (gfc_resolve_close (code
->ext
.close
) == FAILURE
)
8567 resolve_branch (code
->ext
.close
->err
, code
);
8570 case EXEC_BACKSPACE
:
8574 if (gfc_resolve_filepos (code
->ext
.filepos
) == FAILURE
)
8577 resolve_branch (code
->ext
.filepos
->err
, code
);
8581 if (gfc_resolve_inquire (code
->ext
.inquire
) == FAILURE
)
8584 resolve_branch (code
->ext
.inquire
->err
, code
);
8588 gcc_assert (code
->ext
.inquire
!= NULL
);
8589 if (gfc_resolve_inquire (code
->ext
.inquire
) == FAILURE
)
8592 resolve_branch (code
->ext
.inquire
->err
, code
);
8596 if (gfc_resolve_wait (code
->ext
.wait
) == FAILURE
)
8599 resolve_branch (code
->ext
.wait
->err
, code
);
8600 resolve_branch (code
->ext
.wait
->end
, code
);
8601 resolve_branch (code
->ext
.wait
->eor
, code
);
8606 if (gfc_resolve_dt (code
->ext
.dt
, &code
->loc
) == FAILURE
)
8609 resolve_branch (code
->ext
.dt
->err
, code
);
8610 resolve_branch (code
->ext
.dt
->end
, code
);
8611 resolve_branch (code
->ext
.dt
->eor
, code
);
8615 resolve_transfer (code
);
8619 resolve_forall_iterators (code
->ext
.forall_iterator
);
8621 if (code
->expr1
!= NULL
&& code
->expr1
->ts
.type
!= BT_LOGICAL
)
8622 gfc_error ("FORALL mask clause at %L requires a LOGICAL "
8623 "expression", &code
->expr1
->where
);
8626 case EXEC_OMP_ATOMIC
:
8627 case EXEC_OMP_BARRIER
:
8628 case EXEC_OMP_CRITICAL
:
8629 case EXEC_OMP_FLUSH
:
8631 case EXEC_OMP_MASTER
:
8632 case EXEC_OMP_ORDERED
:
8633 case EXEC_OMP_SECTIONS
:
8634 case EXEC_OMP_SINGLE
:
8635 case EXEC_OMP_TASKWAIT
:
8636 case EXEC_OMP_WORKSHARE
:
8637 gfc_resolve_omp_directive (code
, ns
);
8640 case EXEC_OMP_PARALLEL
:
8641 case EXEC_OMP_PARALLEL_DO
:
8642 case EXEC_OMP_PARALLEL_SECTIONS
:
8643 case EXEC_OMP_PARALLEL_WORKSHARE
:
8645 omp_workshare_save
= omp_workshare_flag
;
8646 omp_workshare_flag
= 0;
8647 gfc_resolve_omp_directive (code
, ns
);
8648 omp_workshare_flag
= omp_workshare_save
;
8652 gfc_internal_error ("resolve_code(): Bad statement code");
8656 cs_base
= frame
.prev
;
8660 /* Resolve initial values and make sure they are compatible with
8664 resolve_values (gfc_symbol
*sym
)
8666 if (sym
->value
== NULL
)
8669 if (gfc_resolve_expr (sym
->value
) == FAILURE
)
8672 gfc_check_assign_symbol (sym
, sym
->value
);
8676 /* Verify the binding labels for common blocks that are BIND(C). The label
8677 for a BIND(C) common block must be identical in all scoping units in which
8678 the common block is declared. Further, the binding label can not collide
8679 with any other global entity in the program. */
8682 resolve_bind_c_comms (gfc_symtree
*comm_block_tree
)
8684 if (comm_block_tree
->n
.common
->is_bind_c
== 1)
8686 gfc_gsymbol
*binding_label_gsym
;
8687 gfc_gsymbol
*comm_name_gsym
;
8689 /* See if a global symbol exists by the common block's name. It may
8690 be NULL if the common block is use-associated. */
8691 comm_name_gsym
= gfc_find_gsymbol (gfc_gsym_root
,
8692 comm_block_tree
->n
.common
->name
);
8693 if (comm_name_gsym
!= NULL
&& comm_name_gsym
->type
!= GSYM_COMMON
)
8694 gfc_error ("Binding label '%s' for common block '%s' at %L collides "
8695 "with the global entity '%s' at %L",
8696 comm_block_tree
->n
.common
->binding_label
,
8697 comm_block_tree
->n
.common
->name
,
8698 &(comm_block_tree
->n
.common
->where
),
8699 comm_name_gsym
->name
, &(comm_name_gsym
->where
));
8700 else if (comm_name_gsym
!= NULL
8701 && strcmp (comm_name_gsym
->name
,
8702 comm_block_tree
->n
.common
->name
) == 0)
8704 /* TODO: Need to make sure the fields of gfc_gsymbol are initialized
8706 if (comm_name_gsym
->binding_label
== NULL
)
8707 /* No binding label for common block stored yet; save this one. */
8708 comm_name_gsym
->binding_label
=
8709 comm_block_tree
->n
.common
->binding_label
;
8711 if (strcmp (comm_name_gsym
->binding_label
,
8712 comm_block_tree
->n
.common
->binding_label
) != 0)
8714 /* Common block names match but binding labels do not. */
8715 gfc_error ("Binding label '%s' for common block '%s' at %L "
8716 "does not match the binding label '%s' for common "
8718 comm_block_tree
->n
.common
->binding_label
,
8719 comm_block_tree
->n
.common
->name
,
8720 &(comm_block_tree
->n
.common
->where
),
8721 comm_name_gsym
->binding_label
,
8722 comm_name_gsym
->name
,
8723 &(comm_name_gsym
->where
));
8728 /* There is no binding label (NAME="") so we have nothing further to
8729 check and nothing to add as a global symbol for the label. */
8730 if (comm_block_tree
->n
.common
->binding_label
[0] == '\0' )
8733 binding_label_gsym
=
8734 gfc_find_gsymbol (gfc_gsym_root
,
8735 comm_block_tree
->n
.common
->binding_label
);
8736 if (binding_label_gsym
== NULL
)
8738 /* Need to make a global symbol for the binding label to prevent
8739 it from colliding with another. */
8740 binding_label_gsym
=
8741 gfc_get_gsymbol (comm_block_tree
->n
.common
->binding_label
);
8742 binding_label_gsym
->sym_name
= comm_block_tree
->n
.common
->name
;
8743 binding_label_gsym
->type
= GSYM_COMMON
;
8747 /* If comm_name_gsym is NULL, the name common block is use
8748 associated and the name could be colliding. */
8749 if (binding_label_gsym
->type
!= GSYM_COMMON
)
8750 gfc_error ("Binding label '%s' for common block '%s' at %L "
8751 "collides with the global entity '%s' at %L",
8752 comm_block_tree
->n
.common
->binding_label
,
8753 comm_block_tree
->n
.common
->name
,
8754 &(comm_block_tree
->n
.common
->where
),
8755 binding_label_gsym
->name
,
8756 &(binding_label_gsym
->where
));
8757 else if (comm_name_gsym
!= NULL
8758 && (strcmp (binding_label_gsym
->name
,
8759 comm_name_gsym
->binding_label
) != 0)
8760 && (strcmp (binding_label_gsym
->sym_name
,
8761 comm_name_gsym
->name
) != 0))
8762 gfc_error ("Binding label '%s' for common block '%s' at %L "
8763 "collides with global entity '%s' at %L",
8764 binding_label_gsym
->name
, binding_label_gsym
->sym_name
,
8765 &(comm_block_tree
->n
.common
->where
),
8766 comm_name_gsym
->name
, &(comm_name_gsym
->where
));
8774 /* Verify any BIND(C) derived types in the namespace so we can report errors
8775 for them once, rather than for each variable declared of that type. */
8778 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
8780 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
8781 && derived_sym
->attr
.is_bind_c
== 1)
8782 verify_bind_c_derived_type (derived_sym
);
8788 /* Verify that any binding labels used in a given namespace do not collide
8789 with the names or binding labels of any global symbols. */
8792 gfc_verify_binding_labels (gfc_symbol
*sym
)
8796 if (sym
!= NULL
&& sym
->attr
.is_bind_c
&& sym
->attr
.is_iso_c
== 0
8797 && sym
->attr
.flavor
!= FL_DERIVED
&& sym
->binding_label
[0] != '\0')
8799 gfc_gsymbol
*bind_c_sym
;
8801 bind_c_sym
= gfc_find_gsymbol (gfc_gsym_root
, sym
->binding_label
);
8802 if (bind_c_sym
!= NULL
8803 && strcmp (bind_c_sym
->name
, sym
->binding_label
) == 0)
8805 if (sym
->attr
.if_source
== IFSRC_DECL
8806 && (bind_c_sym
->type
!= GSYM_SUBROUTINE
8807 && bind_c_sym
->type
!= GSYM_FUNCTION
)
8808 && ((sym
->attr
.contained
== 1
8809 && strcmp (bind_c_sym
->sym_name
, sym
->name
) != 0)
8810 || (sym
->attr
.use_assoc
== 1
8811 && (strcmp (bind_c_sym
->mod_name
, sym
->module
) != 0))))
8813 /* Make sure global procedures don't collide with anything. */
8814 gfc_error ("Binding label '%s' at %L collides with the global "
8815 "entity '%s' at %L", sym
->binding_label
,
8816 &(sym
->declared_at
), bind_c_sym
->name
,
8817 &(bind_c_sym
->where
));
8820 else if (sym
->attr
.contained
== 0
8821 && (sym
->attr
.if_source
== IFSRC_IFBODY
8822 && sym
->attr
.flavor
== FL_PROCEDURE
)
8823 && (bind_c_sym
->sym_name
!= NULL
8824 && strcmp (bind_c_sym
->sym_name
, sym
->name
) != 0))
8826 /* Make sure procedures in interface bodies don't collide. */
8827 gfc_error ("Binding label '%s' in interface body at %L collides "
8828 "with the global entity '%s' at %L",
8830 &(sym
->declared_at
), bind_c_sym
->name
,
8831 &(bind_c_sym
->where
));
8834 else if (sym
->attr
.contained
== 0
8835 && sym
->attr
.if_source
== IFSRC_UNKNOWN
)
8836 if ((sym
->attr
.use_assoc
&& bind_c_sym
->mod_name
8837 && strcmp (bind_c_sym
->mod_name
, sym
->module
) != 0)
8838 || sym
->attr
.use_assoc
== 0)
8840 gfc_error ("Binding label '%s' at %L collides with global "
8841 "entity '%s' at %L", sym
->binding_label
,
8842 &(sym
->declared_at
), bind_c_sym
->name
,
8843 &(bind_c_sym
->where
));
8848 /* Clear the binding label to prevent checking multiple times. */
8849 sym
->binding_label
[0] = '\0';
8851 else if (bind_c_sym
== NULL
)
8853 bind_c_sym
= gfc_get_gsymbol (sym
->binding_label
);
8854 bind_c_sym
->where
= sym
->declared_at
;
8855 bind_c_sym
->sym_name
= sym
->name
;
8857 if (sym
->attr
.use_assoc
== 1)
8858 bind_c_sym
->mod_name
= sym
->module
;
8860 if (sym
->ns
->proc_name
!= NULL
)
8861 bind_c_sym
->mod_name
= sym
->ns
->proc_name
->name
;
8863 if (sym
->attr
.contained
== 0)
8865 if (sym
->attr
.subroutine
)
8866 bind_c_sym
->type
= GSYM_SUBROUTINE
;
8867 else if (sym
->attr
.function
)
8868 bind_c_sym
->type
= GSYM_FUNCTION
;
8876 /* Resolve an index expression. */
8879 resolve_index_expr (gfc_expr
*e
)
8881 if (gfc_resolve_expr (e
) == FAILURE
)
8884 if (gfc_simplify_expr (e
, 0) == FAILURE
)
8887 if (gfc_specification_expr (e
) == FAILURE
)
8893 /* Resolve a charlen structure. */
8896 resolve_charlen (gfc_charlen
*cl
)
8905 specification_expr
= 1;
8907 if (resolve_index_expr (cl
->length
) == FAILURE
)
8909 specification_expr
= 0;
8913 /* "If the character length parameter value evaluates to a negative
8914 value, the length of character entities declared is zero." */
8915 if (cl
->length
&& !gfc_extract_int (cl
->length
, &i
) && i
< 0)
8917 if (gfc_option
.warn_surprising
)
8918 gfc_warning_now ("CHARACTER variable at %L has negative length %d,"
8919 " the length has been set to zero",
8920 &cl
->length
->where
, i
);
8921 gfc_replace_expr (cl
->length
,
8922 gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 0));
8925 /* Check that the character length is not too large. */
8926 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
8927 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
8928 && cl
->length
->ts
.type
== BT_INTEGER
8929 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
8931 gfc_error ("String length at %L is too large", &cl
->length
->where
);
8939 /* Test for non-constant shape arrays. */
8942 is_non_constant_shape_array (gfc_symbol
*sym
)
8948 not_constant
= false;
8949 if (sym
->as
!= NULL
)
8951 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
8952 has not been simplified; parameter array references. Do the
8953 simplification now. */
8954 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
8956 e
= sym
->as
->lower
[i
];
8957 if (e
&& (resolve_index_expr (e
) == FAILURE
8958 || !gfc_is_constant_expr (e
)))
8959 not_constant
= true;
8960 e
= sym
->as
->upper
[i
];
8961 if (e
&& (resolve_index_expr (e
) == FAILURE
8962 || !gfc_is_constant_expr (e
)))
8963 not_constant
= true;
8966 return not_constant
;
8969 /* Given a symbol and an initialization expression, add code to initialize
8970 the symbol to the function entry. */
8972 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
8976 gfc_namespace
*ns
= sym
->ns
;
8978 /* Search for the function namespace if this is a contained
8979 function without an explicit result. */
8980 if (sym
->attr
.function
&& sym
== sym
->result
8981 && sym
->name
!= sym
->ns
->proc_name
->name
)
8984 for (;ns
; ns
= ns
->sibling
)
8985 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
8991 gfc_free_expr (init
);
8995 /* Build an l-value expression for the result. */
8996 lval
= gfc_lval_expr_from_sym (sym
);
8998 /* Add the code at scope entry. */
8999 init_st
= gfc_get_code ();
9000 init_st
->next
= ns
->code
;
9003 /* Assign the default initializer to the l-value. */
9004 init_st
->loc
= sym
->declared_at
;
9005 init_st
->op
= EXEC_INIT_ASSIGN
;
9006 init_st
->expr1
= lval
;
9007 init_st
->expr2
= init
;
9010 /* Assign the default initializer to a derived type variable or result. */
9013 apply_default_init (gfc_symbol
*sym
)
9015 gfc_expr
*init
= NULL
;
9017 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
9020 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
9021 init
= gfc_default_initializer (&sym
->ts
);
9026 build_init_assign (sym
, init
);
9029 /* Build an initializer for a local integer, real, complex, logical, or
9030 character variable, based on the command line flags finit-local-zero,
9031 finit-integer=, finit-real=, finit-logical=, and finit-runtime. Returns
9032 null if the symbol should not have a default initialization. */
9034 build_default_init_expr (gfc_symbol
*sym
)
9037 gfc_expr
*init_expr
;
9040 /* These symbols should never have a default initialization. */
9041 if ((sym
->attr
.dimension
&& !gfc_is_compile_time_shape (sym
->as
))
9042 || sym
->attr
.external
9044 || sym
->attr
.pointer
9045 || sym
->attr
.in_equivalence
9046 || sym
->attr
.in_common
9049 || sym
->attr
.cray_pointee
9050 || sym
->attr
.cray_pointer
)
9053 /* Now we'll try to build an initializer expression. */
9054 init_expr
= gfc_get_constant_expr (sym
->ts
.type
, sym
->ts
.kind
,
9057 /* We will only initialize integers, reals, complex, logicals, and
9058 characters, and only if the corresponding command-line flags
9059 were set. Otherwise, we free init_expr and return null. */
9060 switch (sym
->ts
.type
)
9063 if (gfc_option
.flag_init_integer
!= GFC_INIT_INTEGER_OFF
)
9064 mpz_init_set_si (init_expr
->value
.integer
,
9065 gfc_option
.flag_init_integer_value
);
9068 gfc_free_expr (init_expr
);
9074 mpfr_init (init_expr
->value
.real
);
9075 switch (gfc_option
.flag_init_real
)
9077 case GFC_INIT_REAL_SNAN
:
9078 init_expr
->is_snan
= 1;
9080 case GFC_INIT_REAL_NAN
:
9081 mpfr_set_nan (init_expr
->value
.real
);
9084 case GFC_INIT_REAL_INF
:
9085 mpfr_set_inf (init_expr
->value
.real
, 1);
9088 case GFC_INIT_REAL_NEG_INF
:
9089 mpfr_set_inf (init_expr
->value
.real
, -1);
9092 case GFC_INIT_REAL_ZERO
:
9093 mpfr_set_ui (init_expr
->value
.real
, 0.0, GFC_RND_MODE
);
9097 gfc_free_expr (init_expr
);
9104 mpc_init2 (init_expr
->value
.complex, mpfr_get_default_prec());
9105 switch (gfc_option
.flag_init_real
)
9107 case GFC_INIT_REAL_SNAN
:
9108 init_expr
->is_snan
= 1;
9110 case GFC_INIT_REAL_NAN
:
9111 mpfr_set_nan (mpc_realref (init_expr
->value
.complex));
9112 mpfr_set_nan (mpc_imagref (init_expr
->value
.complex));
9115 case GFC_INIT_REAL_INF
:
9116 mpfr_set_inf (mpc_realref (init_expr
->value
.complex), 1);
9117 mpfr_set_inf (mpc_imagref (init_expr
->value
.complex), 1);
9120 case GFC_INIT_REAL_NEG_INF
:
9121 mpfr_set_inf (mpc_realref (init_expr
->value
.complex), -1);
9122 mpfr_set_inf (mpc_imagref (init_expr
->value
.complex), -1);
9125 case GFC_INIT_REAL_ZERO
:
9126 mpc_set_ui (init_expr
->value
.complex, 0, GFC_MPC_RND_MODE
);
9130 gfc_free_expr (init_expr
);
9137 if (gfc_option
.flag_init_logical
== GFC_INIT_LOGICAL_FALSE
)
9138 init_expr
->value
.logical
= 0;
9139 else if (gfc_option
.flag_init_logical
== GFC_INIT_LOGICAL_TRUE
)
9140 init_expr
->value
.logical
= 1;
9143 gfc_free_expr (init_expr
);
9149 /* For characters, the length must be constant in order to
9150 create a default initializer. */
9151 if (gfc_option
.flag_init_character
== GFC_INIT_CHARACTER_ON
9152 && sym
->ts
.u
.cl
->length
9153 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9155 char_len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
9156 init_expr
->value
.character
.length
= char_len
;
9157 init_expr
->value
.character
.string
= gfc_get_wide_string (char_len
+1);
9158 for (i
= 0; i
< char_len
; i
++)
9159 init_expr
->value
.character
.string
[i
]
9160 = (unsigned char) gfc_option
.flag_init_character_value
;
9164 gfc_free_expr (init_expr
);
9170 gfc_free_expr (init_expr
);
9176 /* Add an initialization expression to a local variable. */
9178 apply_default_init_local (gfc_symbol
*sym
)
9180 gfc_expr
*init
= NULL
;
9182 /* The symbol should be a variable or a function return value. */
9183 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
9184 || (sym
->attr
.function
&& sym
->result
!= sym
))
9187 /* Try to build the initializer expression. If we can't initialize
9188 this symbol, then init will be NULL. */
9189 init
= build_default_init_expr (sym
);
9193 /* For saved variables, we don't want to add an initializer at
9194 function entry, so we just add a static initializer. */
9195 if (sym
->attr
.save
|| sym
->ns
->save_all
9196 || gfc_option
.flag_max_stack_var_size
== 0)
9198 /* Don't clobber an existing initializer! */
9199 gcc_assert (sym
->value
== NULL
);
9204 build_init_assign (sym
, init
);
9207 /* Resolution of common features of flavors variable and procedure. */
9210 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
9212 /* Constraints on deferred shape variable. */
9213 if (sym
->as
== NULL
|| sym
->as
->type
!= AS_DEFERRED
)
9215 if (sym
->attr
.allocatable
)
9217 if (sym
->attr
.dimension
)
9219 gfc_error ("Allocatable array '%s' at %L must have "
9220 "a deferred shape", sym
->name
, &sym
->declared_at
);
9223 else if (gfc_notify_std (GFC_STD_F2003
, "Scalar object '%s' at %L "
9224 "may not be ALLOCATABLE", sym
->name
,
9225 &sym
->declared_at
) == FAILURE
)
9229 if (sym
->attr
.pointer
&& sym
->attr
.dimension
)
9231 gfc_error ("Array pointer '%s' at %L must have a deferred shape",
9232 sym
->name
, &sym
->declared_at
);
9239 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
9240 && !sym
->attr
.dummy
&& sym
->ts
.type
!= BT_CLASS
)
9242 gfc_error ("Array '%s' at %L cannot have a deferred shape",
9243 sym
->name
, &sym
->declared_at
);
9251 /* Additional checks for symbols with flavor variable and derived
9252 type. To be called from resolve_fl_variable. */
9255 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
9257 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
9259 /* Check to see if a derived type is blocked from being host
9260 associated by the presence of another class I symbol in the same
9261 namespace. 14.6.1.3 of the standard and the discussion on
9262 comp.lang.fortran. */
9263 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
9264 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
9267 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
9268 if (s
&& s
->attr
.flavor
!= FL_DERIVED
)
9270 gfc_error ("The type '%s' cannot be host associated at %L "
9271 "because it is blocked by an incompatible object "
9272 "of the same name declared at %L",
9273 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
9279 /* 4th constraint in section 11.3: "If an object of a type for which
9280 component-initialization is specified (R429) appears in the
9281 specification-part of a module and does not have the ALLOCATABLE
9282 or POINTER attribute, the object shall have the SAVE attribute."
9284 The check for initializers is performed with
9285 has_default_initializer because gfc_default_initializer generates
9286 a hidden default for allocatable components. */
9287 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
9288 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
9289 && !sym
->ns
->save_all
&& !sym
->attr
.save
9290 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
9291 && has_default_initializer (sym
->ts
.u
.derived
)
9292 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: Implied SAVE for "
9293 "module variable '%s' at %L, needed due to "
9294 "the default initialization", sym
->name
,
9295 &sym
->declared_at
) == FAILURE
)
9298 if (sym
->ts
.type
== BT_CLASS
)
9301 if (!gfc_type_is_extensible (sym
->ts
.u
.derived
->components
->ts
.u
.derived
))
9303 gfc_error ("Type '%s' of CLASS variable '%s' at %L is not extensible",
9304 sym
->ts
.u
.derived
->components
->ts
.u
.derived
->name
,
9305 sym
->name
, &sym
->declared_at
);
9310 /* Assume that use associated symbols were checked in the module ns. */
9311 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
)
9313 gfc_error ("CLASS variable '%s' at %L must be dummy, allocatable "
9314 "or pointer", sym
->name
, &sym
->declared_at
);
9319 /* Assign default initializer. */
9320 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
9321 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
9323 sym
->value
= gfc_default_initializer (&sym
->ts
);
9330 /* Resolve symbols with flavor variable. */
9333 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
9335 int no_init_flag
, automatic_flag
;
9337 const char *auto_save_msg
;
9339 auto_save_msg
= "Automatic object '%s' at %L cannot have the "
9342 if (resolve_fl_var_and_proc (sym
, mp_flag
) == FAILURE
)
9345 /* Set this flag to check that variables are parameters of all entries.
9346 This check is effected by the call to gfc_resolve_expr through
9347 is_non_constant_shape_array. */
9348 specification_expr
= 1;
9350 if (sym
->ns
->proc_name
9351 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
9352 || sym
->ns
->proc_name
->attr
.is_main_program
)
9353 && !sym
->attr
.use_assoc
9354 && !sym
->attr
.allocatable
9355 && !sym
->attr
.pointer
9356 && is_non_constant_shape_array (sym
))
9358 /* The shape of a main program or module array needs to be
9360 gfc_error ("The module or main program array '%s' at %L must "
9361 "have constant shape", sym
->name
, &sym
->declared_at
);
9362 specification_expr
= 0;
9366 if (sym
->ts
.type
== BT_CHARACTER
)
9368 /* Make sure that character string variables with assumed length are
9370 e
= sym
->ts
.u
.cl
->length
;
9371 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
)
9373 gfc_error ("Entity with assumed character length at %L must be a "
9374 "dummy argument or a PARAMETER", &sym
->declared_at
);
9378 if (e
&& sym
->attr
.save
&& !gfc_is_constant_expr (e
))
9380 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
9384 if (!gfc_is_constant_expr (e
)
9385 && !(e
->expr_type
== EXPR_VARIABLE
9386 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
9387 && sym
->ns
->proc_name
9388 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
9389 || sym
->ns
->proc_name
->attr
.is_main_program
)
9390 && !sym
->attr
.use_assoc
)
9392 gfc_error ("'%s' at %L must have constant character length "
9393 "in this context", sym
->name
, &sym
->declared_at
);
9398 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
9399 apply_default_init_local (sym
); /* Try to apply a default initialization. */
9401 /* Determine if the symbol may not have an initializer. */
9402 no_init_flag
= automatic_flag
= 0;
9403 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
9404 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
9406 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
9407 && is_non_constant_shape_array (sym
))
9409 no_init_flag
= automatic_flag
= 1;
9411 /* Also, they must not have the SAVE attribute.
9412 SAVE_IMPLICIT is checked below. */
9413 if (sym
->attr
.save
== SAVE_EXPLICIT
)
9415 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
9420 /* Ensure that any initializer is simplified. */
9422 gfc_simplify_expr (sym
->value
, 1);
9424 /* Reject illegal initializers. */
9425 if (!sym
->mark
&& sym
->value
)
9427 if (sym
->attr
.allocatable
)
9428 gfc_error ("Allocatable '%s' at %L cannot have an initializer",
9429 sym
->name
, &sym
->declared_at
);
9430 else if (sym
->attr
.external
)
9431 gfc_error ("External '%s' at %L cannot have an initializer",
9432 sym
->name
, &sym
->declared_at
);
9433 else if (sym
->attr
.dummy
9434 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
9435 gfc_error ("Dummy '%s' at %L cannot have an initializer",
9436 sym
->name
, &sym
->declared_at
);
9437 else if (sym
->attr
.intrinsic
)
9438 gfc_error ("Intrinsic '%s' at %L cannot have an initializer",
9439 sym
->name
, &sym
->declared_at
);
9440 else if (sym
->attr
.result
)
9441 gfc_error ("Function result '%s' at %L cannot have an initializer",
9442 sym
->name
, &sym
->declared_at
);
9443 else if (automatic_flag
)
9444 gfc_error ("Automatic array '%s' at %L cannot have an initializer",
9445 sym
->name
, &sym
->declared_at
);
9452 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
9453 return resolve_fl_variable_derived (sym
, no_init_flag
);
9459 /* Resolve a procedure. */
9462 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
9464 gfc_formal_arglist
*arg
;
9466 if (sym
->attr
.function
9467 && resolve_fl_var_and_proc (sym
, mp_flag
) == FAILURE
)
9470 if (sym
->ts
.type
== BT_CHARACTER
)
9472 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
9474 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
9475 && resolve_charlen (cl
) == FAILURE
)
9478 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
9479 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
9481 gfc_error ("Character-valued statement function '%s' at %L must "
9482 "have constant length", sym
->name
, &sym
->declared_at
);
9487 /* Ensure that derived type for are not of a private type. Internal
9488 module procedures are excluded by 2.2.3.3 - i.e., they are not
9489 externally accessible and can access all the objects accessible in
9491 if (!(sym
->ns
->parent
9492 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
9493 && gfc_check_access(sym
->attr
.access
, sym
->ns
->default_access
))
9495 gfc_interface
*iface
;
9497 for (arg
= sym
->formal
; arg
; arg
= arg
->next
)
9500 && arg
->sym
->ts
.type
== BT_DERIVED
9501 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
9502 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
9503 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
9504 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: '%s' is of a "
9505 "PRIVATE type and cannot be a dummy argument"
9506 " of '%s', which is PUBLIC at %L",
9507 arg
->sym
->name
, sym
->name
, &sym
->declared_at
)
9510 /* Stop this message from recurring. */
9511 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
9516 /* PUBLIC interfaces may expose PRIVATE procedures that take types
9517 PRIVATE to the containing module. */
9518 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
9520 for (arg
= iface
->sym
->formal
; arg
; arg
= arg
->next
)
9523 && arg
->sym
->ts
.type
== BT_DERIVED
9524 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
9525 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
9526 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
9527 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure "
9528 "'%s' in PUBLIC interface '%s' at %L "
9529 "takes dummy arguments of '%s' which is "
9530 "PRIVATE", iface
->sym
->name
, sym
->name
,
9531 &iface
->sym
->declared_at
,
9532 gfc_typename (&arg
->sym
->ts
)) == FAILURE
)
9534 /* Stop this message from recurring. */
9535 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
9541 /* PUBLIC interfaces may expose PRIVATE procedures that take types
9542 PRIVATE to the containing module. */
9543 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
9545 for (arg
= iface
->sym
->formal
; arg
; arg
= arg
->next
)
9548 && arg
->sym
->ts
.type
== BT_DERIVED
9549 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
9550 && !gfc_check_access (arg
->sym
->ts
.u
.derived
->attr
.access
,
9551 arg
->sym
->ts
.u
.derived
->ns
->default_access
)
9552 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure "
9553 "'%s' in PUBLIC interface '%s' at %L "
9554 "takes dummy arguments of '%s' which is "
9555 "PRIVATE", iface
->sym
->name
, sym
->name
,
9556 &iface
->sym
->declared_at
,
9557 gfc_typename (&arg
->sym
->ts
)) == FAILURE
)
9559 /* Stop this message from recurring. */
9560 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
9567 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
9568 && !sym
->attr
.proc_pointer
)
9570 gfc_error ("Function '%s' at %L cannot have an initializer",
9571 sym
->name
, &sym
->declared_at
);
9575 /* An external symbol may not have an initializer because it is taken to be
9576 a procedure. Exception: Procedure Pointers. */
9577 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
9579 gfc_error ("External object '%s' at %L may not have an initializer",
9580 sym
->name
, &sym
->declared_at
);
9584 /* An elemental function is required to return a scalar 12.7.1 */
9585 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
9587 gfc_error ("ELEMENTAL function '%s' at %L must have a scalar "
9588 "result", sym
->name
, &sym
->declared_at
);
9589 /* Reset so that the error only occurs once. */
9590 sym
->attr
.elemental
= 0;
9594 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
9595 char-len-param shall not be array-valued, pointer-valued, recursive
9596 or pure. ....snip... A character value of * may only be used in the
9597 following ways: (i) Dummy arg of procedure - dummy associates with
9598 actual length; (ii) To declare a named constant; or (iii) External
9599 function - but length must be declared in calling scoping unit. */
9600 if (sym
->attr
.function
9601 && sym
->ts
.type
== BT_CHARACTER
9602 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
9604 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
9605 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
9607 if (sym
->as
&& sym
->as
->rank
)
9608 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9609 "array-valued", sym
->name
, &sym
->declared_at
);
9611 if (sym
->attr
.pointer
)
9612 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9613 "pointer-valued", sym
->name
, &sym
->declared_at
);
9616 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9617 "pure", sym
->name
, &sym
->declared_at
);
9619 if (sym
->attr
.recursive
)
9620 gfc_error ("CHARACTER(*) function '%s' at %L cannot be "
9621 "recursive", sym
->name
, &sym
->declared_at
);
9626 /* Appendix B.2 of the standard. Contained functions give an
9627 error anyway. Fixed-form is likely to be F77/legacy. */
9628 if (!sym
->attr
.contained
&& gfc_current_form
!= FORM_FIXED
)
9629 gfc_notify_std (GFC_STD_F95_OBS
, "Obsolescent feature: "
9630 "CHARACTER(*) function '%s' at %L",
9631 sym
->name
, &sym
->declared_at
);
9634 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
9636 gfc_formal_arglist
*curr_arg
;
9637 int has_non_interop_arg
= 0;
9639 if (verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
9640 sym
->common_block
) == FAILURE
)
9642 /* Clear these to prevent looking at them again if there was an
9644 sym
->attr
.is_bind_c
= 0;
9645 sym
->attr
.is_c_interop
= 0;
9646 sym
->ts
.is_c_interop
= 0;
9650 /* So far, no errors have been found. */
9651 sym
->attr
.is_c_interop
= 1;
9652 sym
->ts
.is_c_interop
= 1;
9655 curr_arg
= sym
->formal
;
9656 while (curr_arg
!= NULL
)
9658 /* Skip implicitly typed dummy args here. */
9659 if (curr_arg
->sym
->attr
.implicit_type
== 0)
9660 if (verify_c_interop_param (curr_arg
->sym
) == FAILURE
)
9661 /* If something is found to fail, record the fact so we
9662 can mark the symbol for the procedure as not being
9663 BIND(C) to try and prevent multiple errors being
9665 has_non_interop_arg
= 1;
9667 curr_arg
= curr_arg
->next
;
9670 /* See if any of the arguments were not interoperable and if so, clear
9671 the procedure symbol to prevent duplicate error messages. */
9672 if (has_non_interop_arg
!= 0)
9674 sym
->attr
.is_c_interop
= 0;
9675 sym
->ts
.is_c_interop
= 0;
9676 sym
->attr
.is_bind_c
= 0;
9680 if (!sym
->attr
.proc_pointer
)
9682 if (sym
->attr
.save
== SAVE_EXPLICIT
)
9684 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
9685 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9688 if (sym
->attr
.intent
)
9690 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
9691 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9694 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
9696 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
9697 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9700 if (sym
->attr
.external
&& sym
->attr
.function
9701 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
9702 || sym
->attr
.contained
))
9704 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
9705 "in '%s' at %L", sym
->name
, &sym
->declared_at
);
9708 if (strcmp ("ppr@", sym
->name
) == 0)
9710 gfc_error ("Procedure pointer result '%s' at %L "
9711 "is missing the pointer attribute",
9712 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
9721 /* Resolve a list of finalizer procedures. That is, after they have hopefully
9722 been defined and we now know their defined arguments, check that they fulfill
9723 the requirements of the standard for procedures used as finalizers. */
9726 gfc_resolve_finalizers (gfc_symbol
* derived
)
9728 gfc_finalizer
* list
;
9729 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
9730 gfc_try result
= SUCCESS
;
9731 bool seen_scalar
= false;
9733 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->finalizers
)
9736 /* Walk over the list of finalizer-procedures, check them, and if any one
9737 does not fit in with the standard's definition, print an error and remove
9738 it from the list. */
9739 prev_link
= &derived
->f2k_derived
->finalizers
;
9740 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
9746 /* Skip this finalizer if we already resolved it. */
9747 if (list
->proc_tree
)
9749 prev_link
= &(list
->next
);
9753 /* Check this exists and is a SUBROUTINE. */
9754 if (!list
->proc_sym
->attr
.subroutine
)
9756 gfc_error ("FINAL procedure '%s' at %L is not a SUBROUTINE",
9757 list
->proc_sym
->name
, &list
->where
);
9761 /* We should have exactly one argument. */
9762 if (!list
->proc_sym
->formal
|| list
->proc_sym
->formal
->next
)
9764 gfc_error ("FINAL procedure at %L must have exactly one argument",
9768 arg
= list
->proc_sym
->formal
->sym
;
9770 /* This argument must be of our type. */
9771 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
9773 gfc_error ("Argument of FINAL procedure at %L must be of type '%s'",
9774 &arg
->declared_at
, derived
->name
);
9778 /* It must neither be a pointer nor allocatable nor optional. */
9779 if (arg
->attr
.pointer
)
9781 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
9785 if (arg
->attr
.allocatable
)
9787 gfc_error ("Argument of FINAL procedure at %L must not be"
9788 " ALLOCATABLE", &arg
->declared_at
);
9791 if (arg
->attr
.optional
)
9793 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
9798 /* It must not be INTENT(OUT). */
9799 if (arg
->attr
.intent
== INTENT_OUT
)
9801 gfc_error ("Argument of FINAL procedure at %L must not be"
9802 " INTENT(OUT)", &arg
->declared_at
);
9806 /* Warn if the procedure is non-scalar and not assumed shape. */
9807 if (gfc_option
.warn_surprising
&& arg
->as
&& arg
->as
->rank
> 0
9808 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
9809 gfc_warning ("Non-scalar FINAL procedure at %L should have assumed"
9810 " shape argument", &arg
->declared_at
);
9812 /* Check that it does not match in kind and rank with a FINAL procedure
9813 defined earlier. To really loop over the *earlier* declarations,
9814 we need to walk the tail of the list as new ones were pushed at the
9816 /* TODO: Handle kind parameters once they are implemented. */
9817 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
9818 for (i
= list
->next
; i
; i
= i
->next
)
9820 /* Argument list might be empty; that is an error signalled earlier,
9821 but we nevertheless continued resolving. */
9822 if (i
->proc_sym
->formal
)
9824 gfc_symbol
* i_arg
= i
->proc_sym
->formal
->sym
;
9825 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
9826 if (i_rank
== my_rank
)
9828 gfc_error ("FINAL procedure '%s' declared at %L has the same"
9829 " rank (%d) as '%s'",
9830 list
->proc_sym
->name
, &list
->where
, my_rank
,
9837 /* Is this the/a scalar finalizer procedure? */
9838 if (!arg
->as
|| arg
->as
->rank
== 0)
9841 /* Find the symtree for this procedure. */
9842 gcc_assert (!list
->proc_tree
);
9843 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
9845 prev_link
= &list
->next
;
9848 /* Remove wrong nodes immediately from the list so we don't risk any
9849 troubles in the future when they might fail later expectations. */
9853 *prev_link
= list
->next
;
9854 gfc_free_finalizer (i
);
9857 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
9858 were nodes in the list, must have been for arrays. It is surely a good
9859 idea to have a scalar version there if there's something to finalize. */
9860 if (gfc_option
.warn_surprising
&& result
== SUCCESS
&& !seen_scalar
)
9861 gfc_warning ("Only array FINAL procedures declared for derived type '%s'"
9862 " defined at %L, suggest also scalar one",
9863 derived
->name
, &derived
->declared_at
);
9865 /* TODO: Remove this error when finalization is finished. */
9866 gfc_error ("Finalization at %L is not yet implemented",
9867 &derived
->declared_at
);
9873 /* Check that it is ok for the typebound procedure proc to override the
9877 check_typebound_override (gfc_symtree
* proc
, gfc_symtree
* old
)
9880 const gfc_symbol
* proc_target
;
9881 const gfc_symbol
* old_target
;
9882 unsigned proc_pass_arg
, old_pass_arg
, argpos
;
9883 gfc_formal_arglist
* proc_formal
;
9884 gfc_formal_arglist
* old_formal
;
9886 /* This procedure should only be called for non-GENERIC proc. */
9887 gcc_assert (!proc
->n
.tb
->is_generic
);
9889 /* If the overwritten procedure is GENERIC, this is an error. */
9890 if (old
->n
.tb
->is_generic
)
9892 gfc_error ("Can't overwrite GENERIC '%s' at %L",
9893 old
->name
, &proc
->n
.tb
->where
);
9897 where
= proc
->n
.tb
->where
;
9898 proc_target
= proc
->n
.tb
->u
.specific
->n
.sym
;
9899 old_target
= old
->n
.tb
->u
.specific
->n
.sym
;
9901 /* Check that overridden binding is not NON_OVERRIDABLE. */
9902 if (old
->n
.tb
->non_overridable
)
9904 gfc_error ("'%s' at %L overrides a procedure binding declared"
9905 " NON_OVERRIDABLE", proc
->name
, &where
);
9909 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
9910 if (!old
->n
.tb
->deferred
&& proc
->n
.tb
->deferred
)
9912 gfc_error ("'%s' at %L must not be DEFERRED as it overrides a"
9913 " non-DEFERRED binding", proc
->name
, &where
);
9917 /* If the overridden binding is PURE, the overriding must be, too. */
9918 if (old_target
->attr
.pure
&& !proc_target
->attr
.pure
)
9920 gfc_error ("'%s' at %L overrides a PURE procedure and must also be PURE",
9921 proc
->name
, &where
);
9925 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
9926 is not, the overriding must not be either. */
9927 if (old_target
->attr
.elemental
&& !proc_target
->attr
.elemental
)
9929 gfc_error ("'%s' at %L overrides an ELEMENTAL procedure and must also be"
9930 " ELEMENTAL", proc
->name
, &where
);
9933 if (!old_target
->attr
.elemental
&& proc_target
->attr
.elemental
)
9935 gfc_error ("'%s' at %L overrides a non-ELEMENTAL procedure and must not"
9936 " be ELEMENTAL, either", proc
->name
, &where
);
9940 /* If the overridden binding is a SUBROUTINE, the overriding must also be a
9942 if (old_target
->attr
.subroutine
&& !proc_target
->attr
.subroutine
)
9944 gfc_error ("'%s' at %L overrides a SUBROUTINE and must also be a"
9945 " SUBROUTINE", proc
->name
, &where
);
9949 /* If the overridden binding is a FUNCTION, the overriding must also be a
9950 FUNCTION and have the same characteristics. */
9951 if (old_target
->attr
.function
)
9953 if (!proc_target
->attr
.function
)
9955 gfc_error ("'%s' at %L overrides a FUNCTION and must also be a"
9956 " FUNCTION", proc
->name
, &where
);
9960 /* FIXME: Do more comprehensive checking (including, for instance, the
9961 rank and array-shape). */
9962 gcc_assert (proc_target
->result
&& old_target
->result
);
9963 if (!gfc_compare_types (&proc_target
->result
->ts
,
9964 &old_target
->result
->ts
))
9966 gfc_error ("'%s' at %L and the overridden FUNCTION should have"
9967 " matching result types", proc
->name
, &where
);
9972 /* If the overridden binding is PUBLIC, the overriding one must not be
9974 if (old
->n
.tb
->access
== ACCESS_PUBLIC
9975 && proc
->n
.tb
->access
== ACCESS_PRIVATE
)
9977 gfc_error ("'%s' at %L overrides a PUBLIC procedure and must not be"
9978 " PRIVATE", proc
->name
, &where
);
9982 /* Compare the formal argument lists of both procedures. This is also abused
9983 to find the position of the passed-object dummy arguments of both
9984 bindings as at least the overridden one might not yet be resolved and we
9985 need those positions in the check below. */
9986 proc_pass_arg
= old_pass_arg
= 0;
9987 if (!proc
->n
.tb
->nopass
&& !proc
->n
.tb
->pass_arg
)
9989 if (!old
->n
.tb
->nopass
&& !old
->n
.tb
->pass_arg
)
9992 for (proc_formal
= proc_target
->formal
, old_formal
= old_target
->formal
;
9993 proc_formal
&& old_formal
;
9994 proc_formal
= proc_formal
->next
, old_formal
= old_formal
->next
)
9996 if (proc
->n
.tb
->pass_arg
9997 && !strcmp (proc
->n
.tb
->pass_arg
, proc_formal
->sym
->name
))
9998 proc_pass_arg
= argpos
;
9999 if (old
->n
.tb
->pass_arg
10000 && !strcmp (old
->n
.tb
->pass_arg
, old_formal
->sym
->name
))
10001 old_pass_arg
= argpos
;
10003 /* Check that the names correspond. */
10004 if (strcmp (proc_formal
->sym
->name
, old_formal
->sym
->name
))
10006 gfc_error ("Dummy argument '%s' of '%s' at %L should be named '%s' as"
10007 " to match the corresponding argument of the overridden"
10008 " procedure", proc_formal
->sym
->name
, proc
->name
, &where
,
10009 old_formal
->sym
->name
);
10013 /* Check that the types correspond if neither is the passed-object
10015 /* FIXME: Do more comprehensive testing here. */
10016 if (proc_pass_arg
!= argpos
&& old_pass_arg
!= argpos
10017 && !gfc_compare_types (&proc_formal
->sym
->ts
, &old_formal
->sym
->ts
))
10019 gfc_error ("Types mismatch for dummy argument '%s' of '%s' %L "
10020 "in respect to the overridden procedure",
10021 proc_formal
->sym
->name
, proc
->name
, &where
);
10027 if (proc_formal
|| old_formal
)
10029 gfc_error ("'%s' at %L must have the same number of formal arguments as"
10030 " the overridden procedure", proc
->name
, &where
);
10034 /* If the overridden binding is NOPASS, the overriding one must also be
10036 if (old
->n
.tb
->nopass
&& !proc
->n
.tb
->nopass
)
10038 gfc_error ("'%s' at %L overrides a NOPASS binding and must also be"
10039 " NOPASS", proc
->name
, &where
);
10043 /* If the overridden binding is PASS(x), the overriding one must also be
10044 PASS and the passed-object dummy arguments must correspond. */
10045 if (!old
->n
.tb
->nopass
)
10047 if (proc
->n
.tb
->nopass
)
10049 gfc_error ("'%s' at %L overrides a binding with PASS and must also be"
10050 " PASS", proc
->name
, &where
);
10054 if (proc_pass_arg
!= old_pass_arg
)
10056 gfc_error ("Passed-object dummy argument of '%s' at %L must be at"
10057 " the same position as the passed-object dummy argument of"
10058 " the overridden procedure", proc
->name
, &where
);
10067 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
10070 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
10071 const char* generic_name
, locus where
)
10076 gcc_assert (t1
->specific
&& t2
->specific
);
10077 gcc_assert (!t1
->specific
->is_generic
);
10078 gcc_assert (!t2
->specific
->is_generic
);
10080 sym1
= t1
->specific
->u
.specific
->n
.sym
;
10081 sym2
= t2
->specific
->u
.specific
->n
.sym
;
10086 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
10087 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
10088 || sym1
->attr
.function
!= sym2
->attr
.function
)
10090 gfc_error ("'%s' and '%s' can't be mixed FUNCTION/SUBROUTINE for"
10091 " GENERIC '%s' at %L",
10092 sym1
->name
, sym2
->name
, generic_name
, &where
);
10096 /* Compare the interfaces. */
10097 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, 1, 0, NULL
, 0))
10099 gfc_error ("'%s' and '%s' for GENERIC '%s' at %L are ambiguous",
10100 sym1
->name
, sym2
->name
, generic_name
, &where
);
10108 /* Worker function for resolving a generic procedure binding; this is used to
10109 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
10111 The difference between those cases is finding possible inherited bindings
10112 that are overridden, as one has to look for them in tb_sym_root,
10113 tb_uop_root or tb_op, respectively. Thus the caller must already find
10114 the super-type and set p->overridden correctly. */
10117 resolve_tb_generic_targets (gfc_symbol
* super_type
,
10118 gfc_typebound_proc
* p
, const char* name
)
10120 gfc_tbp_generic
* target
;
10121 gfc_symtree
* first_target
;
10122 gfc_symtree
* inherited
;
10124 gcc_assert (p
&& p
->is_generic
);
10126 /* Try to find the specific bindings for the symtrees in our target-list. */
10127 gcc_assert (p
->u
.generic
);
10128 for (target
= p
->u
.generic
; target
; target
= target
->next
)
10129 if (!target
->specific
)
10131 gfc_typebound_proc
* overridden_tbp
;
10132 gfc_tbp_generic
* g
;
10133 const char* target_name
;
10135 target_name
= target
->specific_st
->name
;
10137 /* Defined for this type directly. */
10138 if (target
->specific_st
->n
.tb
)
10140 target
->specific
= target
->specific_st
->n
.tb
;
10141 goto specific_found
;
10144 /* Look for an inherited specific binding. */
10147 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
10152 gcc_assert (inherited
->n
.tb
);
10153 target
->specific
= inherited
->n
.tb
;
10154 goto specific_found
;
10158 gfc_error ("Undefined specific binding '%s' as target of GENERIC '%s'"
10159 " at %L", target_name
, name
, &p
->where
);
10162 /* Once we've found the specific binding, check it is not ambiguous with
10163 other specifics already found or inherited for the same GENERIC. */
10165 gcc_assert (target
->specific
);
10167 /* This must really be a specific binding! */
10168 if (target
->specific
->is_generic
)
10170 gfc_error ("GENERIC '%s' at %L must target a specific binding,"
10171 " '%s' is GENERIC, too", name
, &p
->where
, target_name
);
10175 /* Check those already resolved on this type directly. */
10176 for (g
= p
->u
.generic
; g
; g
= g
->next
)
10177 if (g
!= target
&& g
->specific
10178 && check_generic_tbp_ambiguity (target
, g
, name
, p
->where
)
10182 /* Check for ambiguity with inherited specific targets. */
10183 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
10184 overridden_tbp
= overridden_tbp
->overridden
)
10185 if (overridden_tbp
->is_generic
)
10187 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
10189 gcc_assert (g
->specific
);
10190 if (check_generic_tbp_ambiguity (target
, g
,
10191 name
, p
->where
) == FAILURE
)
10197 /* If we attempt to "overwrite" a specific binding, this is an error. */
10198 if (p
->overridden
&& !p
->overridden
->is_generic
)
10200 gfc_error ("GENERIC '%s' at %L can't overwrite specific binding with"
10201 " the same name", name
, &p
->where
);
10205 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
10206 all must have the same attributes here. */
10207 first_target
= p
->u
.generic
->specific
->u
.specific
;
10208 gcc_assert (first_target
);
10209 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
10210 p
->function
= first_target
->n
.sym
->attr
.function
;
10216 /* Resolve a GENERIC procedure binding for a derived type. */
10219 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
10221 gfc_symbol
* super_type
;
10223 /* Find the overridden binding if any. */
10224 st
->n
.tb
->overridden
= NULL
;
10225 super_type
= gfc_get_derived_super_type (derived
);
10228 gfc_symtree
* overridden
;
10229 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
10232 if (overridden
&& overridden
->n
.tb
)
10233 st
->n
.tb
->overridden
= overridden
->n
.tb
;
10236 /* Resolve using worker function. */
10237 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
10241 /* Retrieve the target-procedure of an operator binding and do some checks in
10242 common for intrinsic and user-defined type-bound operators. */
10245 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
10247 gfc_symbol
* target_proc
;
10249 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
10250 target_proc
= target
->specific
->u
.specific
->n
.sym
;
10251 gcc_assert (target_proc
);
10253 /* All operator bindings must have a passed-object dummy argument. */
10254 if (target
->specific
->nopass
)
10256 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
10260 return target_proc
;
10264 /* Resolve a type-bound intrinsic operator. */
10267 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
10268 gfc_typebound_proc
* p
)
10270 gfc_symbol
* super_type
;
10271 gfc_tbp_generic
* target
;
10273 /* If there's already an error here, do nothing (but don't fail again). */
10277 /* Operators should always be GENERIC bindings. */
10278 gcc_assert (p
->is_generic
);
10280 /* Look for an overridden binding. */
10281 super_type
= gfc_get_derived_super_type (derived
);
10282 if (super_type
&& super_type
->f2k_derived
)
10283 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
10286 p
->overridden
= NULL
;
10288 /* Resolve general GENERIC properties using worker function. */
10289 if (resolve_tb_generic_targets (super_type
, p
, gfc_op2string (op
)) == FAILURE
)
10292 /* Check the targets to be procedures of correct interface. */
10293 for (target
= p
->u
.generic
; target
; target
= target
->next
)
10295 gfc_symbol
* target_proc
;
10297 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
10301 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
10313 /* Resolve a type-bound user operator (tree-walker callback). */
10315 static gfc_symbol
* resolve_bindings_derived
;
10316 static gfc_try resolve_bindings_result
;
10318 static gfc_try
check_uop_procedure (gfc_symbol
* sym
, locus where
);
10321 resolve_typebound_user_op (gfc_symtree
* stree
)
10323 gfc_symbol
* super_type
;
10324 gfc_tbp_generic
* target
;
10326 gcc_assert (stree
&& stree
->n
.tb
);
10328 if (stree
->n
.tb
->error
)
10331 /* Operators should always be GENERIC bindings. */
10332 gcc_assert (stree
->n
.tb
->is_generic
);
10334 /* Find overridden procedure, if any. */
10335 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
10336 if (super_type
&& super_type
->f2k_derived
)
10338 gfc_symtree
* overridden
;
10339 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
10340 stree
->name
, true, NULL
);
10342 if (overridden
&& overridden
->n
.tb
)
10343 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
10346 stree
->n
.tb
->overridden
= NULL
;
10348 /* Resolve basically using worker function. */
10349 if (resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
)
10353 /* Check the targets to be functions of correct interface. */
10354 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
10356 gfc_symbol
* target_proc
;
10358 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
10362 if (check_uop_procedure (target_proc
, stree
->n
.tb
->where
) == FAILURE
)
10369 resolve_bindings_result
= FAILURE
;
10370 stree
->n
.tb
->error
= 1;
10374 /* Resolve the type-bound procedures for a derived type. */
10377 resolve_typebound_procedure (gfc_symtree
* stree
)
10381 gfc_symbol
* me_arg
;
10382 gfc_symbol
* super_type
;
10383 gfc_component
* comp
;
10385 gcc_assert (stree
);
10387 /* Undefined specific symbol from GENERIC target definition. */
10391 if (stree
->n
.tb
->error
)
10394 /* If this is a GENERIC binding, use that routine. */
10395 if (stree
->n
.tb
->is_generic
)
10397 if (resolve_typebound_generic (resolve_bindings_derived
, stree
)
10403 /* Get the target-procedure to check it. */
10404 gcc_assert (!stree
->n
.tb
->is_generic
);
10405 gcc_assert (stree
->n
.tb
->u
.specific
);
10406 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
10407 where
= stree
->n
.tb
->where
;
10409 /* Default access should already be resolved from the parser. */
10410 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
10412 /* It should be a module procedure or an external procedure with explicit
10413 interface. For DEFERRED bindings, abstract interfaces are ok as well. */
10414 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
10415 || (proc
->attr
.proc
!= PROC_MODULE
10416 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
10417 || (proc
->attr
.abstract
&& !stree
->n
.tb
->deferred
))
10419 gfc_error ("'%s' must be a module procedure or an external procedure with"
10420 " an explicit interface at %L", proc
->name
, &where
);
10423 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
10424 stree
->n
.tb
->function
= proc
->attr
.function
;
10426 /* Find the super-type of the current derived type. We could do this once and
10427 store in a global if speed is needed, but as long as not I believe this is
10428 more readable and clearer. */
10429 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
10431 /* If PASS, resolve and check arguments if not already resolved / loaded
10432 from a .mod file. */
10433 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
10435 if (stree
->n
.tb
->pass_arg
)
10437 gfc_formal_arglist
* i
;
10439 /* If an explicit passing argument name is given, walk the arg-list
10440 and look for it. */
10443 stree
->n
.tb
->pass_arg_num
= 1;
10444 for (i
= proc
->formal
; i
; i
= i
->next
)
10446 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
10451 ++stree
->n
.tb
->pass_arg_num
;
10456 gfc_error ("Procedure '%s' with PASS(%s) at %L has no"
10458 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
10459 stree
->n
.tb
->pass_arg
);
10465 /* Otherwise, take the first one; there should in fact be at least
10467 stree
->n
.tb
->pass_arg_num
= 1;
10470 gfc_error ("Procedure '%s' with PASS at %L must have at"
10471 " least one argument", proc
->name
, &where
);
10474 me_arg
= proc
->formal
->sym
;
10477 /* Now check that the argument-type matches and the passed-object
10478 dummy argument is generally fine. */
10480 gcc_assert (me_arg
);
10482 if (me_arg
->ts
.type
!= BT_CLASS
)
10484 gfc_error ("Non-polymorphic passed-object dummy argument of '%s'"
10485 " at %L", proc
->name
, &where
);
10489 if (me_arg
->ts
.u
.derived
->components
->ts
.u
.derived
10490 != resolve_bindings_derived
)
10492 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L must be of"
10493 " the derived-type '%s'", me_arg
->name
, proc
->name
,
10494 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
10498 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
10499 if (me_arg
->ts
.u
.derived
->components
->as
10500 && me_arg
->ts
.u
.derived
->components
->as
->rank
> 0)
10502 gfc_error ("Passed-object dummy argument of '%s' at %L must be"
10503 " scalar", proc
->name
, &where
);
10506 if (me_arg
->ts
.u
.derived
->components
->attr
.allocatable
)
10508 gfc_error ("Passed-object dummy argument of '%s' at %L must not"
10509 " be ALLOCATABLE", proc
->name
, &where
);
10512 if (me_arg
->ts
.u
.derived
->components
->attr
.class_pointer
)
10514 gfc_error ("Passed-object dummy argument of '%s' at %L must not"
10515 " be POINTER", proc
->name
, &where
);
10520 /* If we are extending some type, check that we don't override a procedure
10521 flagged NON_OVERRIDABLE. */
10522 stree
->n
.tb
->overridden
= NULL
;
10525 gfc_symtree
* overridden
;
10526 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
10527 stree
->name
, true, NULL
);
10529 if (overridden
&& overridden
->n
.tb
)
10530 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
10532 if (overridden
&& check_typebound_override (stree
, overridden
) == FAILURE
)
10536 /* See if there's a name collision with a component directly in this type. */
10537 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
10538 if (!strcmp (comp
->name
, stree
->name
))
10540 gfc_error ("Procedure '%s' at %L has the same name as a component of"
10542 stree
->name
, &where
, resolve_bindings_derived
->name
);
10546 /* Try to find a name collision with an inherited component. */
10547 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true))
10549 gfc_error ("Procedure '%s' at %L has the same name as an inherited"
10550 " component of '%s'",
10551 stree
->name
, &where
, resolve_bindings_derived
->name
);
10555 stree
->n
.tb
->error
= 0;
10559 resolve_bindings_result
= FAILURE
;
10560 stree
->n
.tb
->error
= 1;
10564 resolve_typebound_procedures (gfc_symbol
* derived
)
10568 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
10571 resolve_bindings_derived
= derived
;
10572 resolve_bindings_result
= SUCCESS
;
10574 if (derived
->f2k_derived
->tb_sym_root
)
10575 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
10576 &resolve_typebound_procedure
);
10578 if (derived
->f2k_derived
->tb_uop_root
)
10579 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
10580 &resolve_typebound_user_op
);
10582 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
10584 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
10585 if (p
&& resolve_typebound_intrinsic_op (derived
, (gfc_intrinsic_op
) op
,
10587 resolve_bindings_result
= FAILURE
;
10590 return resolve_bindings_result
;
10594 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
10595 to give all identical derived types the same backend_decl. */
10597 add_dt_to_dt_list (gfc_symbol
*derived
)
10599 gfc_dt_list
*dt_list
;
10601 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
10602 if (derived
== dt_list
->derived
)
10605 if (dt_list
== NULL
)
10607 dt_list
= gfc_get_dt_list ();
10608 dt_list
->next
= gfc_derived_types
;
10609 dt_list
->derived
= derived
;
10610 gfc_derived_types
= dt_list
;
10615 /* Ensure that a derived-type is really not abstract, meaning that every
10616 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
10619 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
10624 if (ensure_not_abstract_walker (sub
, st
->left
) == FAILURE
)
10626 if (ensure_not_abstract_walker (sub
, st
->right
) == FAILURE
)
10629 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
10631 gfc_symtree
* overriding
;
10632 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
10635 gcc_assert (overriding
->n
.tb
);
10636 if (overriding
->n
.tb
->deferred
)
10638 gfc_error ("Derived-type '%s' declared at %L must be ABSTRACT because"
10639 " '%s' is DEFERRED and not overridden",
10640 sub
->name
, &sub
->declared_at
, st
->name
);
10649 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
10651 /* The algorithm used here is to recursively travel up the ancestry of sub
10652 and for each ancestor-type, check all bindings. If any of them is
10653 DEFERRED, look it up starting from sub and see if the found (overriding)
10654 binding is not DEFERRED.
10655 This is not the most efficient way to do this, but it should be ok and is
10656 clearer than something sophisticated. */
10658 gcc_assert (ancestor
&& ancestor
->attr
.abstract
&& !sub
->attr
.abstract
);
10660 /* Walk bindings of this ancestor. */
10661 if (ancestor
->f2k_derived
)
10664 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
10669 /* Find next ancestor type and recurse on it. */
10670 ancestor
= gfc_get_derived_super_type (ancestor
);
10672 return ensure_not_abstract (sub
, ancestor
);
10678 static void resolve_symbol (gfc_symbol
*sym
);
10681 /* Resolve the components of a derived type. */
10684 resolve_fl_derived (gfc_symbol
*sym
)
10686 gfc_symbol
* super_type
;
10690 super_type
= gfc_get_derived_super_type (sym
);
10693 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
10695 gfc_error ("As extending type '%s' at %L has a coarray component, "
10696 "parent type '%s' shall also have one", sym
->name
,
10697 &sym
->declared_at
, super_type
->name
);
10701 /* Ensure the extended type gets resolved before we do. */
10702 if (super_type
&& resolve_fl_derived (super_type
) == FAILURE
)
10705 /* An ABSTRACT type must be extensible. */
10706 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
10708 gfc_error ("Non-extensible derived-type '%s' at %L must not be ABSTRACT",
10709 sym
->name
, &sym
->declared_at
);
10713 for (c
= sym
->components
; c
!= NULL
; c
= c
->next
)
10716 if (c
->attr
.codimension
/* FIXME: c->as check due to PR 43412. */
10717 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
10719 gfc_error ("Coarray component '%s' at %L must be allocatable with "
10720 "deferred shape", c
->name
, &c
->loc
);
10725 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
10726 && c
->ts
.u
.derived
->ts
.is_iso_c
)
10728 gfc_error ("Component '%s' at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
10729 "shall not be a coarray", c
->name
, &c
->loc
);
10734 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.coarray_comp
10735 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
10736 || c
->attr
.allocatable
))
10738 gfc_error ("Component '%s' at %L with coarray component "
10739 "shall be a nonpointer, nonallocatable scalar",
10744 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
10746 if (c
->ts
.interface
->attr
.procedure
)
10747 gfc_error ("Interface '%s', used by procedure pointer component "
10748 "'%s' at %L, is declared in a later PROCEDURE statement",
10749 c
->ts
.interface
->name
, c
->name
, &c
->loc
);
10751 /* Get the attributes from the interface (now resolved). */
10752 if (c
->ts
.interface
->attr
.if_source
10753 || c
->ts
.interface
->attr
.intrinsic
)
10755 gfc_symbol
*ifc
= c
->ts
.interface
;
10757 if (ifc
->formal
&& !ifc
->formal_ns
)
10758 resolve_symbol (ifc
);
10760 if (ifc
->attr
.intrinsic
)
10761 resolve_intrinsic (ifc
, &ifc
->declared_at
);
10765 c
->ts
= ifc
->result
->ts
;
10766 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
10767 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
10768 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
10769 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
10774 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
10775 c
->attr
.pointer
= ifc
->attr
.pointer
;
10776 c
->attr
.dimension
= ifc
->attr
.dimension
;
10777 c
->as
= gfc_copy_array_spec (ifc
->as
);
10779 c
->ts
.interface
= ifc
;
10780 c
->attr
.function
= ifc
->attr
.function
;
10781 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
10782 gfc_copy_formal_args_ppc (c
, ifc
);
10784 c
->attr
.pure
= ifc
->attr
.pure
;
10785 c
->attr
.elemental
= ifc
->attr
.elemental
;
10786 c
->attr
.recursive
= ifc
->attr
.recursive
;
10787 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
10788 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
10789 /* Replace symbols in array spec. */
10793 for (i
= 0; i
< c
->as
->rank
; i
++)
10795 gfc_expr_replace_comp (c
->as
->lower
[i
], c
);
10796 gfc_expr_replace_comp (c
->as
->upper
[i
], c
);
10799 /* Copy char length. */
10800 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
10802 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
10803 gfc_expr_replace_comp (cl
->length
, c
);
10804 if (cl
->length
&& !cl
->resolved
10805 && gfc_resolve_expr (cl
->length
) == FAILURE
)
10810 else if (c
->ts
.interface
->name
[0] != '\0')
10812 gfc_error ("Interface '%s' of procedure pointer component "
10813 "'%s' at %L must be explicit", c
->ts
.interface
->name
,
10818 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
10820 /* Since PPCs are not implicitly typed, a PPC without an explicit
10821 interface must be a subroutine. */
10822 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
10825 /* Procedure pointer components: Check PASS arg. */
10826 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0)
10828 gfc_symbol
* me_arg
;
10830 if (c
->tb
->pass_arg
)
10832 gfc_formal_arglist
* i
;
10834 /* If an explicit passing argument name is given, walk the arg-list
10835 and look for it. */
10838 c
->tb
->pass_arg_num
= 1;
10839 for (i
= c
->formal
; i
; i
= i
->next
)
10841 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
10846 c
->tb
->pass_arg_num
++;
10851 gfc_error ("Procedure pointer component '%s' with PASS(%s) "
10852 "at %L has no argument '%s'", c
->name
,
10853 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
10860 /* Otherwise, take the first one; there should in fact be at least
10862 c
->tb
->pass_arg_num
= 1;
10865 gfc_error ("Procedure pointer component '%s' with PASS at %L "
10866 "must have at least one argument",
10871 me_arg
= c
->formal
->sym
;
10874 /* Now check that the argument-type matches. */
10875 gcc_assert (me_arg
);
10876 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
10877 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
10878 || (me_arg
->ts
.type
== BT_CLASS
10879 && me_arg
->ts
.u
.derived
->components
->ts
.u
.derived
!= sym
))
10881 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L must be of"
10882 " the derived type '%s'", me_arg
->name
, c
->name
,
10883 me_arg
->name
, &c
->loc
, sym
->name
);
10888 /* Check for C453. */
10889 if (me_arg
->attr
.dimension
)
10891 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
10892 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
10898 if (me_arg
->attr
.pointer
)
10900 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
10901 "may not have the POINTER attribute", me_arg
->name
,
10902 c
->name
, me_arg
->name
, &c
->loc
);
10907 if (me_arg
->attr
.allocatable
)
10909 gfc_error ("Argument '%s' of '%s' with PASS(%s) at %L "
10910 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
10911 me_arg
->name
, &c
->loc
);
10916 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
10917 gfc_error ("Non-polymorphic passed-object dummy argument of '%s'"
10918 " at %L", c
->name
, &c
->loc
);
10922 /* Check type-spec if this is not the parent-type component. */
10923 if ((!sym
->attr
.extension
|| c
!= sym
->components
)
10924 && resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
) == FAILURE
)
10927 /* If this type is an extension, set the accessibility of the parent
10929 if (super_type
&& c
== sym
->components
10930 && strcmp (super_type
->name
, c
->name
) == 0)
10931 c
->attr
.access
= super_type
->attr
.access
;
10933 /* If this type is an extension, see if this component has the same name
10934 as an inherited type-bound procedure. */
10936 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
10938 gfc_error ("Component '%s' of '%s' at %L has the same name as an"
10939 " inherited type-bound procedure",
10940 c
->name
, sym
->name
, &c
->loc
);
10944 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
)
10946 if (c
->ts
.u
.cl
->length
== NULL
10947 || (resolve_charlen (c
->ts
.u
.cl
) == FAILURE
)
10948 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
10950 gfc_error ("Character length of component '%s' needs to "
10951 "be a constant specification expression at %L",
10953 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
10958 if (c
->ts
.type
== BT_DERIVED
10959 && sym
->component_access
!= ACCESS_PRIVATE
10960 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
)
10961 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
10962 && !c
->ts
.u
.derived
->attr
.use_assoc
10963 && !gfc_check_access (c
->ts
.u
.derived
->attr
.access
,
10964 c
->ts
.u
.derived
->ns
->default_access
)
10965 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: the component '%s' "
10966 "is a PRIVATE type and cannot be a component of "
10967 "'%s', which is PUBLIC at %L", c
->name
,
10968 sym
->name
, &sym
->declared_at
) == FAILURE
)
10971 if (sym
->attr
.sequence
)
10973 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
10975 gfc_error ("Component %s of SEQUENCE type declared at %L does "
10976 "not have the SEQUENCE attribute",
10977 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
10982 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
10983 && c
->ts
.u
.derived
->components
== NULL
10984 && !c
->ts
.u
.derived
->attr
.zero_comp
)
10986 gfc_error ("The pointer component '%s' of '%s' at %L is a type "
10987 "that has not been declared", c
->name
, sym
->name
,
10993 if (c
->ts
.type
== BT_CLASS
10994 && !(c
->ts
.u
.derived
->components
->attr
.pointer
10995 || c
->ts
.u
.derived
->components
->attr
.allocatable
))
10997 gfc_error ("Component '%s' with CLASS at %L must be allocatable "
10998 "or pointer", c
->name
, &c
->loc
);
11002 /* Ensure that all the derived type components are put on the
11003 derived type list; even in formal namespaces, where derived type
11004 pointer components might not have been declared. */
11005 if (c
->ts
.type
== BT_DERIVED
11007 && c
->ts
.u
.derived
->components
11009 && sym
!= c
->ts
.u
.derived
)
11010 add_dt_to_dt_list (c
->ts
.u
.derived
);
11012 if (c
->attr
.pointer
|| c
->attr
.proc_pointer
|| c
->attr
.allocatable
11016 for (i
= 0; i
< c
->as
->rank
; i
++)
11018 if (c
->as
->lower
[i
] == NULL
11019 || (resolve_index_expr (c
->as
->lower
[i
]) == FAILURE
)
11020 || !gfc_is_constant_expr (c
->as
->lower
[i
])
11021 || c
->as
->upper
[i
] == NULL
11022 || (resolve_index_expr (c
->as
->upper
[i
]) == FAILURE
)
11023 || !gfc_is_constant_expr (c
->as
->upper
[i
]))
11025 gfc_error ("Component '%s' of '%s' at %L must have "
11026 "constant array bounds",
11027 c
->name
, sym
->name
, &c
->loc
);
11033 /* Resolve the type-bound procedures. */
11034 if (resolve_typebound_procedures (sym
) == FAILURE
)
11037 /* Resolve the finalizer procedures. */
11038 if (gfc_resolve_finalizers (sym
) == FAILURE
)
11041 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
11042 all DEFERRED bindings are overridden. */
11043 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
11044 && ensure_not_abstract (sym
, super_type
) == FAILURE
)
11047 /* Add derived type to the derived type list. */
11048 add_dt_to_dt_list (sym
);
11055 resolve_fl_namelist (gfc_symbol
*sym
)
11060 /* Reject PRIVATE objects in a PUBLIC namelist. */
11061 if (gfc_check_access(sym
->attr
.access
, sym
->ns
->default_access
))
11063 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
11065 if (!nl
->sym
->attr
.use_assoc
11066 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
11067 && !gfc_check_access(nl
->sym
->attr
.access
,
11068 nl
->sym
->ns
->default_access
))
11070 gfc_error ("NAMELIST object '%s' was declared PRIVATE and "
11071 "cannot be member of PUBLIC namelist '%s' at %L",
11072 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11076 /* Types with private components that came here by USE-association. */
11077 if (nl
->sym
->ts
.type
== BT_DERIVED
11078 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
11080 gfc_error ("NAMELIST object '%s' has use-associated PRIVATE "
11081 "components and cannot be member of namelist '%s' at %L",
11082 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11086 /* Types with private components that are defined in the same module. */
11087 if (nl
->sym
->ts
.type
== BT_DERIVED
11088 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
11089 && !gfc_check_access (nl
->sym
->ts
.u
.derived
->attr
.private_comp
11090 ? ACCESS_PRIVATE
: ACCESS_UNKNOWN
,
11091 nl
->sym
->ns
->default_access
))
11093 gfc_error ("NAMELIST object '%s' has PRIVATE components and "
11094 "cannot be a member of PUBLIC namelist '%s' at %L",
11095 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11101 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
11103 /* Reject namelist arrays of assumed shape. */
11104 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
11105 && gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object '%s' "
11106 "must not have assumed shape in namelist "
11107 "'%s' at %L", nl
->sym
->name
, sym
->name
,
11108 &sym
->declared_at
) == FAILURE
)
11111 /* Reject namelist arrays that are not constant shape. */
11112 if (is_non_constant_shape_array (nl
->sym
))
11114 gfc_error ("NAMELIST array object '%s' must have constant "
11115 "shape in namelist '%s' at %L", nl
->sym
->name
,
11116 sym
->name
, &sym
->declared_at
);
11120 /* Namelist objects cannot have allocatable or pointer components. */
11121 if (nl
->sym
->ts
.type
!= BT_DERIVED
)
11124 if (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
)
11126 gfc_error ("NAMELIST object '%s' in namelist '%s' at %L cannot "
11127 "have ALLOCATABLE components",
11128 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11132 if (nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
)
11134 gfc_error ("NAMELIST object '%s' in namelist '%s' at %L cannot "
11135 "have POINTER components",
11136 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
11142 /* 14.1.2 A module or internal procedure represent local entities
11143 of the same type as a namelist member and so are not allowed. */
11144 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
11146 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
11149 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
11150 if ((nl
->sym
== sym
->ns
->proc_name
)
11152 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
11156 if (nl
->sym
&& nl
->sym
->name
)
11157 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
11158 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
11160 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
11161 "attribute in '%s' at %L", nlsym
->name
,
11162 &sym
->declared_at
);
11172 resolve_fl_parameter (gfc_symbol
*sym
)
11174 /* A parameter array's shape needs to be constant. */
11175 if (sym
->as
!= NULL
11176 && (sym
->as
->type
== AS_DEFERRED
11177 || is_non_constant_shape_array (sym
)))
11179 gfc_error ("Parameter array '%s' at %L cannot be automatic "
11180 "or of deferred shape", sym
->name
, &sym
->declared_at
);
11184 /* Make sure a parameter that has been implicitly typed still
11185 matches the implicit type, since PARAMETER statements can precede
11186 IMPLICIT statements. */
11187 if (sym
->attr
.implicit_type
11188 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
11191 gfc_error ("Implicitly typed PARAMETER '%s' at %L doesn't match a "
11192 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
11196 /* Make sure the types of derived parameters are consistent. This
11197 type checking is deferred until resolution because the type may
11198 refer to a derived type from the host. */
11199 if (sym
->ts
.type
== BT_DERIVED
11200 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
11202 gfc_error ("Incompatible derived type in PARAMETER at %L",
11203 &sym
->value
->where
);
11210 /* Do anything necessary to resolve a symbol. Right now, we just
11211 assume that an otherwise unknown symbol is a variable. This sort
11212 of thing commonly happens for symbols in module. */
11215 resolve_symbol (gfc_symbol
*sym
)
11217 int check_constant
, mp_flag
;
11218 gfc_symtree
*symtree
;
11219 gfc_symtree
*this_symtree
;
11223 if (sym
->attr
.flavor
== FL_UNKNOWN
)
11226 /* If we find that a flavorless symbol is an interface in one of the
11227 parent namespaces, find its symtree in this namespace, free the
11228 symbol and set the symtree to point to the interface symbol. */
11229 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
11231 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
11232 if (symtree
&& symtree
->n
.sym
->generic
)
11234 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
11238 gfc_free_symbol (sym
);
11239 symtree
->n
.sym
->refs
++;
11240 this_symtree
->n
.sym
= symtree
->n
.sym
;
11245 /* Otherwise give it a flavor according to such attributes as
11247 if (sym
->attr
.external
== 0 && sym
->attr
.intrinsic
== 0)
11248 sym
->attr
.flavor
= FL_VARIABLE
;
11251 sym
->attr
.flavor
= FL_PROCEDURE
;
11252 if (sym
->attr
.dimension
)
11253 sym
->attr
.function
= 1;
11257 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
11258 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
11260 if (sym
->attr
.procedure
&& sym
->ts
.interface
11261 && sym
->attr
.if_source
!= IFSRC_DECL
)
11263 if (sym
->ts
.interface
== sym
)
11265 gfc_error ("PROCEDURE '%s' at %L may not be used as its own "
11266 "interface", sym
->name
, &sym
->declared_at
);
11269 if (sym
->ts
.interface
->attr
.procedure
)
11271 gfc_error ("Interface '%s', used by procedure '%s' at %L, is declared"
11272 " in a later PROCEDURE statement", sym
->ts
.interface
->name
,
11273 sym
->name
,&sym
->declared_at
);
11277 /* Get the attributes from the interface (now resolved). */
11278 if (sym
->ts
.interface
->attr
.if_source
11279 || sym
->ts
.interface
->attr
.intrinsic
)
11281 gfc_symbol
*ifc
= sym
->ts
.interface
;
11282 resolve_symbol (ifc
);
11284 if (ifc
->attr
.intrinsic
)
11285 resolve_intrinsic (ifc
, &ifc
->declared_at
);
11288 sym
->ts
= ifc
->result
->ts
;
11291 sym
->ts
.interface
= ifc
;
11292 sym
->attr
.function
= ifc
->attr
.function
;
11293 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
11294 gfc_copy_formal_args (sym
, ifc
);
11296 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
11297 sym
->attr
.pointer
= ifc
->attr
.pointer
;
11298 sym
->attr
.pure
= ifc
->attr
.pure
;
11299 sym
->attr
.elemental
= ifc
->attr
.elemental
;
11300 sym
->attr
.dimension
= ifc
->attr
.dimension
;
11301 sym
->attr
.recursive
= ifc
->attr
.recursive
;
11302 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
11303 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
11304 /* Copy array spec. */
11305 sym
->as
= gfc_copy_array_spec (ifc
->as
);
11309 for (i
= 0; i
< sym
->as
->rank
; i
++)
11311 gfc_expr_replace_symbols (sym
->as
->lower
[i
], sym
);
11312 gfc_expr_replace_symbols (sym
->as
->upper
[i
], sym
);
11315 /* Copy char length. */
11316 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
11318 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
11319 gfc_expr_replace_symbols (sym
->ts
.u
.cl
->length
, sym
);
11320 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
11321 && gfc_resolve_expr (sym
->ts
.u
.cl
->length
) == FAILURE
)
11325 else if (sym
->ts
.interface
->name
[0] != '\0')
11327 gfc_error ("Interface '%s' of procedure '%s' at %L must be explicit",
11328 sym
->ts
.interface
->name
, sym
->name
, &sym
->declared_at
);
11333 if (sym
->attr
.flavor
== FL_DERIVED
&& resolve_fl_derived (sym
) == FAILURE
)
11336 /* Symbols that are module procedures with results (functions) have
11337 the types and array specification copied for type checking in
11338 procedures that call them, as well as for saving to a module
11339 file. These symbols can't stand the scrutiny that their results
11341 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
11344 /* Make sure that the intrinsic is consistent with its internal
11345 representation. This needs to be done before assigning a default
11346 type to avoid spurious warnings. */
11347 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
11348 && resolve_intrinsic (sym
, &sym
->declared_at
) == FAILURE
)
11351 /* Assign default type to symbols that need one and don't have one. */
11352 if (sym
->ts
.type
== BT_UNKNOWN
)
11354 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
11355 gfc_set_default_type (sym
, 1, NULL
);
11357 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
11358 && !sym
->attr
.function
&& !sym
->attr
.subroutine
11359 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
11360 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
11362 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
11364 /* The specific case of an external procedure should emit an error
11365 in the case that there is no implicit type. */
11367 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
11370 /* Result may be in another namespace. */
11371 resolve_symbol (sym
->result
);
11373 if (!sym
->result
->attr
.proc_pointer
)
11375 sym
->ts
= sym
->result
->ts
;
11376 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
11377 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
11378 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
11379 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
11385 /* Assumed size arrays and assumed shape arrays must be dummy
11388 if (sym
->as
!= NULL
11389 && ((sym
->as
->type
== AS_ASSUMED_SIZE
&& !sym
->as
->cp_was_assumed
)
11390 || sym
->as
->type
== AS_ASSUMED_SHAPE
)
11391 && sym
->attr
.dummy
== 0)
11393 if (sym
->as
->type
== AS_ASSUMED_SIZE
)
11394 gfc_error ("Assumed size array at %L must be a dummy argument",
11395 &sym
->declared_at
);
11397 gfc_error ("Assumed shape array at %L must be a dummy argument",
11398 &sym
->declared_at
);
11402 /* Make sure symbols with known intent or optional are really dummy
11403 variable. Because of ENTRY statement, this has to be deferred
11404 until resolution time. */
11406 if (!sym
->attr
.dummy
11407 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
11409 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
11413 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
11415 gfc_error ("'%s' at %L cannot have the VALUE attribute because "
11416 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
11420 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
11422 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
11423 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
11425 gfc_error ("Character dummy variable '%s' at %L with VALUE "
11426 "attribute must have constant length",
11427 sym
->name
, &sym
->declared_at
);
11431 if (sym
->ts
.is_c_interop
11432 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
11434 gfc_error ("C interoperable character dummy variable '%s' at %L "
11435 "with VALUE attribute must have length one",
11436 sym
->name
, &sym
->declared_at
);
11441 /* If the symbol is marked as bind(c), verify it's type and kind. Do not
11442 do this for something that was implicitly typed because that is handled
11443 in gfc_set_default_type. Handle dummy arguments and procedure
11444 definitions separately. Also, anything that is use associated is not
11445 handled here but instead is handled in the module it is declared in.
11446 Finally, derived type definitions are allowed to be BIND(C) since that
11447 only implies that they're interoperable, and they are checked fully for
11448 interoperability when a variable is declared of that type. */
11449 if (sym
->attr
.is_bind_c
&& sym
->attr
.implicit_type
== 0 &&
11450 sym
->attr
.use_assoc
== 0 && sym
->attr
.dummy
== 0 &&
11451 sym
->attr
.flavor
!= FL_PROCEDURE
&& sym
->attr
.flavor
!= FL_DERIVED
)
11453 gfc_try t
= SUCCESS
;
11455 /* First, make sure the variable is declared at the
11456 module-level scope (J3/04-007, Section 15.3). */
11457 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
11458 sym
->attr
.in_common
== 0)
11460 gfc_error ("Variable '%s' at %L cannot be BIND(C) because it "
11461 "is neither a COMMON block nor declared at the "
11462 "module level scope", sym
->name
, &(sym
->declared_at
));
11465 else if (sym
->common_head
!= NULL
)
11467 t
= verify_com_block_vars_c_interop (sym
->common_head
);
11471 /* If type() declaration, we need to verify that the components
11472 of the given type are all C interoperable, etc. */
11473 if (sym
->ts
.type
== BT_DERIVED
&&
11474 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
11476 /* Make sure the user marked the derived type as BIND(C). If
11477 not, call the verify routine. This could print an error
11478 for the derived type more than once if multiple variables
11479 of that type are declared. */
11480 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
11481 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
11485 /* Verify the variable itself as C interoperable if it
11486 is BIND(C). It is not possible for this to succeed if
11487 the verify_bind_c_derived_type failed, so don't have to handle
11488 any error returned by verify_bind_c_derived_type. */
11489 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
11490 sym
->common_block
);
11495 /* clear the is_bind_c flag to prevent reporting errors more than
11496 once if something failed. */
11497 sym
->attr
.is_bind_c
= 0;
11502 /* If a derived type symbol has reached this point, without its
11503 type being declared, we have an error. Notice that most
11504 conditions that produce undefined derived types have already
11505 been dealt with. However, the likes of:
11506 implicit type(t) (t) ..... call foo (t) will get us here if
11507 the type is not declared in the scope of the implicit
11508 statement. Change the type to BT_UNKNOWN, both because it is so
11509 and to prevent an ICE. */
11510 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->components
== NULL
11511 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
11513 gfc_error ("The derived type '%s' at %L is of type '%s', "
11514 "which has not been defined", sym
->name
,
11515 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
11516 sym
->ts
.type
= BT_UNKNOWN
;
11520 /* Make sure that the derived type has been resolved and that the
11521 derived type is visible in the symbol's namespace, if it is a
11522 module function and is not PRIVATE. */
11523 if (sym
->ts
.type
== BT_DERIVED
11524 && sym
->ts
.u
.derived
->attr
.use_assoc
11525 && sym
->ns
->proc_name
11526 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11530 if (resolve_fl_derived (sym
->ts
.u
.derived
) == FAILURE
)
11533 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 1, &ds
);
11534 if (!ds
&& sym
->attr
.function
11535 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
))
11537 symtree
= gfc_new_symtree (&sym
->ns
->sym_root
,
11538 sym
->ts
.u
.derived
->name
);
11539 symtree
->n
.sym
= sym
->ts
.u
.derived
;
11540 sym
->ts
.u
.derived
->refs
++;
11544 /* Unless the derived-type declaration is use associated, Fortran 95
11545 does not allow public entries of private derived types.
11546 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
11547 161 in 95-006r3. */
11548 if (sym
->ts
.type
== BT_DERIVED
11549 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11550 && !sym
->ts
.u
.derived
->attr
.use_assoc
11551 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
)
11552 && !gfc_check_access (sym
->ts
.u
.derived
->attr
.access
,
11553 sym
->ts
.u
.derived
->ns
->default_access
)
11554 && gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PUBLIC %s '%s' at %L "
11555 "of PRIVATE derived type '%s'",
11556 (sym
->attr
.flavor
== FL_PARAMETER
) ? "parameter"
11557 : "variable", sym
->name
, &sym
->declared_at
,
11558 sym
->ts
.u
.derived
->name
) == FAILURE
)
11561 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
11562 default initialization is defined (5.1.2.4.4). */
11563 if (sym
->ts
.type
== BT_DERIVED
11565 && sym
->attr
.intent
== INTENT_OUT
11567 && sym
->as
->type
== AS_ASSUMED_SIZE
)
11569 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
11571 if (c
->initializer
)
11573 gfc_error ("The INTENT(OUT) dummy argument '%s' at %L is "
11574 "ASSUMED SIZE and so cannot have a default initializer",
11575 sym
->name
, &sym
->declared_at
);
11582 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
11583 || sym
->attr
.codimension
)
11584 && sym
->attr
.result
)
11585 gfc_error ("Function result '%s' at %L shall not be a coarray or have "
11586 "a coarray component", sym
->name
, &sym
->declared_at
);
11589 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
11590 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
11591 gfc_error ("Variable '%s' at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
11592 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
11595 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
11596 && (sym
->attr
.codimension
|| sym
->attr
.pointer
|| sym
->attr
.dimension
11597 || sym
->attr
.allocatable
))
11598 gfc_error ("Variable '%s' at %L with coarray component "
11599 "shall be a nonpointer, nonallocatable scalar",
11600 sym
->name
, &sym
->declared_at
);
11602 /* F2008, C526. The function-result case was handled above. */
11603 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
11604 || sym
->attr
.codimension
)
11605 && !(sym
->attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
11606 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11607 || sym
->ns
->proc_name
->attr
.is_main_program
11608 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
11609 gfc_error ("Variable '%s' at %L is a coarray or has a coarray "
11610 "component and is not ALLOCATABLE, SAVE nor a "
11611 "dummy argument", sym
->name
, &sym
->declared_at
);
11612 /* F2008, C528. */ /* FIXME: sym->as check due to PR 43412. */
11613 else if (sym
->attr
.codimension
&& !sym
->attr
.allocatable
11614 && sym
->as
&& sym
->as
->cotype
== AS_DEFERRED
)
11615 gfc_error ("Coarray variable '%s' at %L shall not have codimensions with "
11616 "deferred shape", sym
->name
, &sym
->declared_at
);
11617 else if (sym
->attr
.codimension
&& sym
->attr
.allocatable
11618 && (sym
->as
->type
!= AS_DEFERRED
|| sym
->as
->cotype
!= AS_DEFERRED
))
11619 gfc_error ("Allocatable coarray variable '%s' at %L must have "
11620 "deferred shape", sym
->name
, &sym
->declared_at
);
11624 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
11625 || (sym
->attr
.codimension
&& sym
->attr
.allocatable
))
11626 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
11627 gfc_error ("Variable '%s' at %L is INTENT(OUT) and can thus not be an "
11628 "allocatable coarray or have coarray components",
11629 sym
->name
, &sym
->declared_at
);
11631 if (sym
->attr
.codimension
&& sym
->attr
.dummy
11632 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
11633 gfc_error ("Coarray dummy variable '%s' at %L not allowed in BIND(C) "
11634 "procedure '%s'", sym
->name
, &sym
->declared_at
,
11635 sym
->ns
->proc_name
->name
);
11637 switch (sym
->attr
.flavor
)
11640 if (resolve_fl_variable (sym
, mp_flag
) == FAILURE
)
11645 if (resolve_fl_procedure (sym
, mp_flag
) == FAILURE
)
11650 if (resolve_fl_namelist (sym
) == FAILURE
)
11655 if (resolve_fl_parameter (sym
) == FAILURE
)
11663 /* Resolve array specifier. Check as well some constraints
11664 on COMMON blocks. */
11666 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
11668 /* Set the formal_arg_flag so that check_conflict will not throw
11669 an error for host associated variables in the specification
11670 expression for an array_valued function. */
11671 if (sym
->attr
.function
&& sym
->as
)
11672 formal_arg_flag
= 1;
11674 gfc_resolve_array_spec (sym
->as
, check_constant
);
11676 formal_arg_flag
= 0;
11678 /* Resolve formal namespaces. */
11679 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
11680 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
11681 gfc_resolve (sym
->formal_ns
);
11683 /* Make sure the formal namespace is present. */
11684 if (sym
->formal
&& !sym
->formal_ns
)
11686 gfc_formal_arglist
*formal
= sym
->formal
;
11687 while (formal
&& !formal
->sym
)
11688 formal
= formal
->next
;
11692 sym
->formal_ns
= formal
->sym
->ns
;
11693 sym
->formal_ns
->refs
++;
11697 /* Check threadprivate restrictions. */
11698 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
&& !sym
->ns
->save_all
11699 && (!sym
->attr
.in_common
11700 && sym
->module
== NULL
11701 && (sym
->ns
->proc_name
== NULL
11702 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
11703 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
11705 /* If we have come this far we can apply default-initializers, as
11706 described in 14.7.5, to those variables that have not already
11707 been assigned one. */
11708 if (sym
->ts
.type
== BT_DERIVED
11709 && sym
->attr
.referenced
11710 && sym
->ns
== gfc_current_ns
11712 && !sym
->attr
.allocatable
11713 && !sym
->attr
.alloc_comp
)
11715 symbol_attribute
*a
= &sym
->attr
;
11717 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
11718 && !a
->in_common
&& !a
->use_assoc
11719 && !(a
->function
&& sym
!= sym
->result
))
11720 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
11721 apply_default_init (sym
);
11724 /* If this symbol has a type-spec, check it. */
11725 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
11726 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
11727 if (resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
)
11733 /************* Resolve DATA statements *************/
11737 gfc_data_value
*vnode
;
11743 /* Advance the values structure to point to the next value in the data list. */
11746 next_data_value (void)
11748 while (mpz_cmp_ui (values
.left
, 0) == 0)
11751 if (values
.vnode
->next
== NULL
)
11754 values
.vnode
= values
.vnode
->next
;
11755 mpz_set (values
.left
, values
.vnode
->repeat
);
11763 check_data_variable (gfc_data_variable
*var
, locus
*where
)
11769 ar_type mark
= AR_UNKNOWN
;
11771 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
11777 if (gfc_resolve_expr (var
->expr
) == FAILURE
)
11781 mpz_init_set_si (offset
, 0);
11784 if (e
->expr_type
!= EXPR_VARIABLE
)
11785 gfc_internal_error ("check_data_variable(): Bad expression");
11787 sym
= e
->symtree
->n
.sym
;
11789 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
11791 gfc_error ("BLOCK DATA element '%s' at %L must be in COMMON",
11792 sym
->name
, &sym
->declared_at
);
11795 if (e
->ref
== NULL
&& sym
->as
)
11797 gfc_error ("DATA array '%s' at %L must be specified in a previous"
11798 " declaration", sym
->name
, where
);
11802 has_pointer
= sym
->attr
.pointer
;
11804 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11806 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
11809 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
)
11811 gfc_error ("DATA element '%s' at %L cannot have a coindex",
11817 && ref
->type
== REF_ARRAY
11818 && ref
->u
.ar
.type
!= AR_FULL
)
11820 gfc_error ("DATA element '%s' at %L is a pointer and so must "
11821 "be a full array", sym
->name
, where
);
11826 if (e
->rank
== 0 || has_pointer
)
11828 mpz_init_set_ui (size
, 1);
11835 /* Find the array section reference. */
11836 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
11838 if (ref
->type
!= REF_ARRAY
)
11840 if (ref
->u
.ar
.type
== AR_ELEMENT
)
11846 /* Set marks according to the reference pattern. */
11847 switch (ref
->u
.ar
.type
)
11855 /* Get the start position of array section. */
11856 gfc_get_section_index (ar
, section_index
, &offset
);
11861 gcc_unreachable ();
11864 if (gfc_array_size (e
, &size
) == FAILURE
)
11866 gfc_error ("Nonconstant array section at %L in DATA statement",
11868 mpz_clear (offset
);
11875 while (mpz_cmp_ui (size
, 0) > 0)
11877 if (next_data_value () == FAILURE
)
11879 gfc_error ("DATA statement at %L has more variables than values",
11885 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
11889 /* If we have more than one element left in the repeat count,
11890 and we have more than one element left in the target variable,
11891 then create a range assignment. */
11892 /* FIXME: Only done for full arrays for now, since array sections
11894 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
11895 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
11899 if (mpz_cmp (size
, values
.left
) >= 0)
11901 mpz_init_set (range
, values
.left
);
11902 mpz_sub (size
, size
, values
.left
);
11903 mpz_set_ui (values
.left
, 0);
11907 mpz_init_set (range
, size
);
11908 mpz_sub (values
.left
, values
.left
, size
);
11909 mpz_set_ui (size
, 0);
11912 gfc_assign_data_value_range (var
->expr
, values
.vnode
->expr
,
11915 mpz_add (offset
, offset
, range
);
11919 /* Assign initial value to symbol. */
11922 mpz_sub_ui (values
.left
, values
.left
, 1);
11923 mpz_sub_ui (size
, size
, 1);
11925 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
, offset
);
11929 if (mark
== AR_FULL
)
11930 mpz_add_ui (offset
, offset
, 1);
11932 /* Modify the array section indexes and recalculate the offset
11933 for next element. */
11934 else if (mark
== AR_SECTION
)
11935 gfc_advance_section (section_index
, ar
, &offset
);
11939 if (mark
== AR_SECTION
)
11941 for (i
= 0; i
< ar
->dimen
; i
++)
11942 mpz_clear (section_index
[i
]);
11946 mpz_clear (offset
);
11952 static gfc_try
traverse_data_var (gfc_data_variable
*, locus
*);
11954 /* Iterate over a list of elements in a DATA statement. */
11957 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
11960 iterator_stack frame
;
11961 gfc_expr
*e
, *start
, *end
, *step
;
11962 gfc_try retval
= SUCCESS
;
11964 mpz_init (frame
.value
);
11966 start
= gfc_copy_expr (var
->iter
.start
);
11967 end
= gfc_copy_expr (var
->iter
.end
);
11968 step
= gfc_copy_expr (var
->iter
.step
);
11970 if (gfc_simplify_expr (start
, 1) == FAILURE
11971 || start
->expr_type
!= EXPR_CONSTANT
)
11973 gfc_error ("iterator start at %L does not simplify", &start
->where
);
11977 if (gfc_simplify_expr (end
, 1) == FAILURE
11978 || end
->expr_type
!= EXPR_CONSTANT
)
11980 gfc_error ("iterator end at %L does not simplify", &end
->where
);
11984 if (gfc_simplify_expr (step
, 1) == FAILURE
11985 || step
->expr_type
!= EXPR_CONSTANT
)
11987 gfc_error ("iterator step at %L does not simplify", &step
->where
);
11992 mpz_init_set (trip
, end
->value
.integer
);
11993 mpz_sub (trip
, trip
, start
->value
.integer
);
11994 mpz_add (trip
, trip
, step
->value
.integer
);
11996 mpz_div (trip
, trip
, step
->value
.integer
);
11998 mpz_set (frame
.value
, start
->value
.integer
);
12000 frame
.prev
= iter_stack
;
12001 frame
.variable
= var
->iter
.var
->symtree
;
12002 iter_stack
= &frame
;
12004 while (mpz_cmp_ui (trip
, 0) > 0)
12006 if (traverse_data_var (var
->list
, where
) == FAILURE
)
12013 e
= gfc_copy_expr (var
->expr
);
12014 if (gfc_simplify_expr (e
, 1) == FAILURE
)
12022 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
12024 mpz_sub_ui (trip
, trip
, 1);
12029 mpz_clear (frame
.value
);
12031 gfc_free_expr (start
);
12032 gfc_free_expr (end
);
12033 gfc_free_expr (step
);
12035 iter_stack
= frame
.prev
;
12040 /* Type resolve variables in the variable list of a DATA statement. */
12043 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
12047 for (; var
; var
= var
->next
)
12049 if (var
->expr
== NULL
)
12050 t
= traverse_data_list (var
, where
);
12052 t
= check_data_variable (var
, where
);
12062 /* Resolve the expressions and iterators associated with a data statement.
12063 This is separate from the assignment checking because data lists should
12064 only be resolved once. */
12067 resolve_data_variables (gfc_data_variable
*d
)
12069 for (; d
; d
= d
->next
)
12071 if (d
->list
== NULL
)
12073 if (gfc_resolve_expr (d
->expr
) == FAILURE
)
12078 if (gfc_resolve_iterator (&d
->iter
, false) == FAILURE
)
12081 if (resolve_data_variables (d
->list
) == FAILURE
)
12090 /* Resolve a single DATA statement. We implement this by storing a pointer to
12091 the value list into static variables, and then recursively traversing the
12092 variables list, expanding iterators and such. */
12095 resolve_data (gfc_data
*d
)
12098 if (resolve_data_variables (d
->var
) == FAILURE
)
12101 values
.vnode
= d
->value
;
12102 if (d
->value
== NULL
)
12103 mpz_set_ui (values
.left
, 0);
12105 mpz_set (values
.left
, d
->value
->repeat
);
12107 if (traverse_data_var (d
->var
, &d
->where
) == FAILURE
)
12110 /* At this point, we better not have any values left. */
12112 if (next_data_value () == SUCCESS
)
12113 gfc_error ("DATA statement at %L has more values than variables",
12118 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
12119 accessed by host or use association, is a dummy argument to a pure function,
12120 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
12121 is storage associated with any such variable, shall not be used in the
12122 following contexts: (clients of this function). */
12124 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
12125 procedure. Returns zero if assignment is OK, nonzero if there is a
12128 gfc_impure_variable (gfc_symbol
*sym
)
12133 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
12136 /* Check if the symbol's ns is inside the pure procedure. */
12137 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
12141 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
12145 proc
= sym
->ns
->proc_name
;
12146 if (sym
->attr
.dummy
&& gfc_pure (proc
)
12147 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
12149 proc
->attr
.function
))
12152 /* TODO: Sort out what can be storage associated, if anything, and include
12153 it here. In principle equivalences should be scanned but it does not
12154 seem to be possible to storage associate an impure variable this way. */
12159 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
12160 current namespace is inside a pure procedure. */
12163 gfc_pure (gfc_symbol
*sym
)
12165 symbol_attribute attr
;
12170 /* Check if the current namespace or one of its parents
12171 belongs to a pure procedure. */
12172 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
12174 sym
= ns
->proc_name
;
12178 if (attr
.flavor
== FL_PROCEDURE
&& (attr
.pure
|| attr
.elemental
))
12186 return attr
.flavor
== FL_PROCEDURE
&& (attr
.pure
|| attr
.elemental
);
12190 /* Test whether the current procedure is elemental or not. */
12193 gfc_elemental (gfc_symbol
*sym
)
12195 symbol_attribute attr
;
12198 sym
= gfc_current_ns
->proc_name
;
12203 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
12207 /* Warn about unused labels. */
12210 warn_unused_fortran_label (gfc_st_label
*label
)
12215 warn_unused_fortran_label (label
->left
);
12217 if (label
->defined
== ST_LABEL_UNKNOWN
)
12220 switch (label
->referenced
)
12222 case ST_LABEL_UNKNOWN
:
12223 gfc_warning ("Label %d at %L defined but not used", label
->value
,
12227 case ST_LABEL_BAD_TARGET
:
12228 gfc_warning ("Label %d at %L defined but cannot be used",
12229 label
->value
, &label
->where
);
12236 warn_unused_fortran_label (label
->right
);
12240 /* Returns the sequence type of a symbol or sequence. */
12243 sequence_type (gfc_typespec ts
)
12252 if (ts
.u
.derived
->components
== NULL
)
12253 return SEQ_NONDEFAULT
;
12255 result
= sequence_type (ts
.u
.derived
->components
->ts
);
12256 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
12257 if (sequence_type (c
->ts
) != result
)
12263 if (ts
.kind
!= gfc_default_character_kind
)
12264 return SEQ_NONDEFAULT
;
12266 return SEQ_CHARACTER
;
12269 if (ts
.kind
!= gfc_default_integer_kind
)
12270 return SEQ_NONDEFAULT
;
12272 return SEQ_NUMERIC
;
12275 if (!(ts
.kind
== gfc_default_real_kind
12276 || ts
.kind
== gfc_default_double_kind
))
12277 return SEQ_NONDEFAULT
;
12279 return SEQ_NUMERIC
;
12282 if (ts
.kind
!= gfc_default_complex_kind
)
12283 return SEQ_NONDEFAULT
;
12285 return SEQ_NUMERIC
;
12288 if (ts
.kind
!= gfc_default_logical_kind
)
12289 return SEQ_NONDEFAULT
;
12291 return SEQ_NUMERIC
;
12294 return SEQ_NONDEFAULT
;
12299 /* Resolve derived type EQUIVALENCE object. */
12302 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
12304 gfc_component
*c
= derived
->components
;
12309 /* Shall not be an object of nonsequence derived type. */
12310 if (!derived
->attr
.sequence
)
12312 gfc_error ("Derived type variable '%s' at %L must have SEQUENCE "
12313 "attribute to be an EQUIVALENCE object", sym
->name
,
12318 /* Shall not have allocatable components. */
12319 if (derived
->attr
.alloc_comp
)
12321 gfc_error ("Derived type variable '%s' at %L cannot have ALLOCATABLE "
12322 "components to be an EQUIVALENCE object",sym
->name
,
12327 if (sym
->attr
.in_common
&& has_default_initializer (sym
->ts
.u
.derived
))
12329 gfc_error ("Derived type variable '%s' at %L with default "
12330 "initialization cannot be in EQUIVALENCE with a variable "
12331 "in COMMON", sym
->name
, &e
->where
);
12335 for (; c
; c
= c
->next
)
12337 if (c
->ts
.type
== BT_DERIVED
12338 && (resolve_equivalence_derived (c
->ts
.u
.derived
, sym
, e
) == FAILURE
))
12341 /* Shall not be an object of sequence derived type containing a pointer
12342 in the structure. */
12343 if (c
->attr
.pointer
)
12345 gfc_error ("Derived type variable '%s' at %L with pointer "
12346 "component(s) cannot be an EQUIVALENCE object",
12347 sym
->name
, &e
->where
);
12355 /* Resolve equivalence object.
12356 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
12357 an allocatable array, an object of nonsequence derived type, an object of
12358 sequence derived type containing a pointer at any level of component
12359 selection, an automatic object, a function name, an entry name, a result
12360 name, a named constant, a structure component, or a subobject of any of
12361 the preceding objects. A substring shall not have length zero. A
12362 derived type shall not have components with default initialization nor
12363 shall two objects of an equivalence group be initialized.
12364 Either all or none of the objects shall have an protected attribute.
12365 The simple constraints are done in symbol.c(check_conflict) and the rest
12366 are implemented here. */
12369 resolve_equivalence (gfc_equiv
*eq
)
12372 gfc_symbol
*first_sym
;
12375 locus
*last_where
= NULL
;
12376 seq_type eq_type
, last_eq_type
;
12377 gfc_typespec
*last_ts
;
12378 int object
, cnt_protected
;
12381 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
12383 first_sym
= eq
->expr
->symtree
->n
.sym
;
12387 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
12391 e
->ts
= e
->symtree
->n
.sym
->ts
;
12392 /* match_varspec might not know yet if it is seeing
12393 array reference or substring reference, as it doesn't
12395 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
12397 gfc_ref
*ref
= e
->ref
;
12398 sym
= e
->symtree
->n
.sym
;
12400 if (sym
->attr
.dimension
)
12402 ref
->u
.ar
.as
= sym
->as
;
12406 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
12407 if (e
->ts
.type
== BT_CHARACTER
12409 && ref
->type
== REF_ARRAY
12410 && ref
->u
.ar
.dimen
== 1
12411 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
12412 && ref
->u
.ar
.stride
[0] == NULL
)
12414 gfc_expr
*start
= ref
->u
.ar
.start
[0];
12415 gfc_expr
*end
= ref
->u
.ar
.end
[0];
12418 /* Optimize away the (:) reference. */
12419 if (start
== NULL
&& end
== NULL
)
12422 e
->ref
= ref
->next
;
12424 e
->ref
->next
= ref
->next
;
12429 ref
->type
= REF_SUBSTRING
;
12431 start
= gfc_get_int_expr (gfc_default_integer_kind
,
12433 ref
->u
.ss
.start
= start
;
12434 if (end
== NULL
&& e
->ts
.u
.cl
)
12435 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
12436 ref
->u
.ss
.end
= end
;
12437 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
12444 /* Any further ref is an error. */
12447 gcc_assert (ref
->type
== REF_ARRAY
);
12448 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
12454 if (gfc_resolve_expr (e
) == FAILURE
)
12457 sym
= e
->symtree
->n
.sym
;
12459 if (sym
->attr
.is_protected
)
12461 if (cnt_protected
> 0 && cnt_protected
!= object
)
12463 gfc_error ("Either all or none of the objects in the "
12464 "EQUIVALENCE set at %L shall have the "
12465 "PROTECTED attribute",
12470 /* Shall not equivalence common block variables in a PURE procedure. */
12471 if (sym
->ns
->proc_name
12472 && sym
->ns
->proc_name
->attr
.pure
12473 && sym
->attr
.in_common
)
12475 gfc_error ("Common block member '%s' at %L cannot be an EQUIVALENCE "
12476 "object in the pure procedure '%s'",
12477 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
12481 /* Shall not be a named constant. */
12482 if (e
->expr_type
== EXPR_CONSTANT
)
12484 gfc_error ("Named constant '%s' at %L cannot be an EQUIVALENCE "
12485 "object", sym
->name
, &e
->where
);
12489 if (e
->ts
.type
== BT_DERIVED
12490 && resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
) == FAILURE
)
12493 /* Check that the types correspond correctly:
12495 A numeric sequence structure may be equivalenced to another sequence
12496 structure, an object of default integer type, default real type, double
12497 precision real type, default logical type such that components of the
12498 structure ultimately only become associated to objects of the same
12499 kind. A character sequence structure may be equivalenced to an object
12500 of default character kind or another character sequence structure.
12501 Other objects may be equivalenced only to objects of the same type and
12502 kind parameters. */
12504 /* Identical types are unconditionally OK. */
12505 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
12506 goto identical_types
;
12508 last_eq_type
= sequence_type (*last_ts
);
12509 eq_type
= sequence_type (sym
->ts
);
12511 /* Since the pair of objects is not of the same type, mixed or
12512 non-default sequences can be rejected. */
12514 msg
= "Sequence %s with mixed components in EQUIVALENCE "
12515 "statement at %L with different type objects";
12517 && last_eq_type
== SEQ_MIXED
12518 && gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
)
12520 || (eq_type
== SEQ_MIXED
12521 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12522 &e
->where
) == FAILURE
))
12525 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
12526 "statement at %L with objects of different type";
12528 && last_eq_type
== SEQ_NONDEFAULT
12529 && gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
,
12530 last_where
) == FAILURE
)
12531 || (eq_type
== SEQ_NONDEFAULT
12532 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12533 &e
->where
) == FAILURE
))
12536 msg
="Non-CHARACTER object '%s' in default CHARACTER "
12537 "EQUIVALENCE statement at %L";
12538 if (last_eq_type
== SEQ_CHARACTER
12539 && eq_type
!= SEQ_CHARACTER
12540 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12541 &e
->where
) == FAILURE
)
12544 msg
="Non-NUMERIC object '%s' in default NUMERIC "
12545 "EQUIVALENCE statement at %L";
12546 if (last_eq_type
== SEQ_NUMERIC
12547 && eq_type
!= SEQ_NUMERIC
12548 && gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
,
12549 &e
->where
) == FAILURE
)
12554 last_where
= &e
->where
;
12559 /* Shall not be an automatic array. */
12560 if (e
->ref
->type
== REF_ARRAY
12561 && gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1) == FAILURE
)
12563 gfc_error ("Array '%s' at %L with non-constant bounds cannot be "
12564 "an EQUIVALENCE object", sym
->name
, &e
->where
);
12571 /* Shall not be a structure component. */
12572 if (r
->type
== REF_COMPONENT
)
12574 gfc_error ("Structure component '%s' at %L cannot be an "
12575 "EQUIVALENCE object",
12576 r
->u
.c
.component
->name
, &e
->where
);
12580 /* A substring shall not have length zero. */
12581 if (r
->type
== REF_SUBSTRING
)
12583 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
12585 gfc_error ("Substring at %L has length zero",
12586 &r
->u
.ss
.start
->where
);
12596 /* Resolve function and ENTRY types, issue diagnostics if needed. */
12599 resolve_fntype (gfc_namespace
*ns
)
12601 gfc_entry_list
*el
;
12604 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
12607 /* If there are any entries, ns->proc_name is the entry master
12608 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
12610 sym
= ns
->entries
->sym
;
12612 sym
= ns
->proc_name
;
12613 if (sym
->result
== sym
12614 && sym
->ts
.type
== BT_UNKNOWN
12615 && gfc_set_default_type (sym
, 0, NULL
) == FAILURE
12616 && !sym
->attr
.untyped
)
12618 gfc_error ("Function '%s' at %L has no IMPLICIT type",
12619 sym
->name
, &sym
->declared_at
);
12620 sym
->attr
.untyped
= 1;
12623 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
12624 && !sym
->attr
.contained
12625 && !gfc_check_access (sym
->ts
.u
.derived
->attr
.access
,
12626 sym
->ts
.u
.derived
->ns
->default_access
)
12627 && gfc_check_access (sym
->attr
.access
, sym
->ns
->default_access
))
12629 gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PUBLIC function '%s' at "
12630 "%L of PRIVATE type '%s'", sym
->name
,
12631 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
12635 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
12637 if (el
->sym
->result
== el
->sym
12638 && el
->sym
->ts
.type
== BT_UNKNOWN
12639 && gfc_set_default_type (el
->sym
, 0, NULL
) == FAILURE
12640 && !el
->sym
->attr
.untyped
)
12642 gfc_error ("ENTRY '%s' at %L has no IMPLICIT type",
12643 el
->sym
->name
, &el
->sym
->declared_at
);
12644 el
->sym
->attr
.untyped
= 1;
12650 /* 12.3.2.1.1 Defined operators. */
12653 check_uop_procedure (gfc_symbol
*sym
, locus where
)
12655 gfc_formal_arglist
*formal
;
12657 if (!sym
->attr
.function
)
12659 gfc_error ("User operator procedure '%s' at %L must be a FUNCTION",
12660 sym
->name
, &where
);
12664 if (sym
->ts
.type
== BT_CHARACTER
12665 && !(sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
)
12666 && !(sym
->result
&& sym
->result
->ts
.u
.cl
12667 && sym
->result
->ts
.u
.cl
->length
))
12669 gfc_error ("User operator procedure '%s' at %L cannot be assumed "
12670 "character length", sym
->name
, &where
);
12674 formal
= sym
->formal
;
12675 if (!formal
|| !formal
->sym
)
12677 gfc_error ("User operator procedure '%s' at %L must have at least "
12678 "one argument", sym
->name
, &where
);
12682 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
12684 gfc_error ("First argument of operator interface at %L must be "
12685 "INTENT(IN)", &where
);
12689 if (formal
->sym
->attr
.optional
)
12691 gfc_error ("First argument of operator interface at %L cannot be "
12692 "optional", &where
);
12696 formal
= formal
->next
;
12697 if (!formal
|| !formal
->sym
)
12700 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
12702 gfc_error ("Second argument of operator interface at %L must be "
12703 "INTENT(IN)", &where
);
12707 if (formal
->sym
->attr
.optional
)
12709 gfc_error ("Second argument of operator interface at %L cannot be "
12710 "optional", &where
);
12716 gfc_error ("Operator interface at %L must have, at most, two "
12717 "arguments", &where
);
12725 gfc_resolve_uops (gfc_symtree
*symtree
)
12727 gfc_interface
*itr
;
12729 if (symtree
== NULL
)
12732 gfc_resolve_uops (symtree
->left
);
12733 gfc_resolve_uops (symtree
->right
);
12735 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
12736 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
12740 /* Examine all of the expressions associated with a program unit,
12741 assign types to all intermediate expressions, make sure that all
12742 assignments are to compatible types and figure out which names
12743 refer to which functions or subroutines. It doesn't check code
12744 block, which is handled by resolve_code. */
12747 resolve_types (gfc_namespace
*ns
)
12753 gfc_namespace
* old_ns
= gfc_current_ns
;
12755 /* Check that all IMPLICIT types are ok. */
12756 if (!ns
->seen_implicit_none
)
12759 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
12760 if (ns
->set_flag
[letter
]
12761 && resolve_typespec_used (&ns
->default_type
[letter
],
12762 &ns
->implicit_loc
[letter
],
12767 gfc_current_ns
= ns
;
12769 resolve_entries (ns
);
12771 resolve_common_vars (ns
->blank_common
.head
, false);
12772 resolve_common_blocks (ns
->common_root
);
12774 resolve_contained_functions (ns
);
12776 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
12778 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
12779 resolve_charlen (cl
);
12781 gfc_traverse_ns (ns
, resolve_symbol
);
12783 resolve_fntype (ns
);
12785 for (n
= ns
->contained
; n
; n
= n
->sibling
)
12787 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
12788 gfc_error ("Contained procedure '%s' at %L of a PURE procedure must "
12789 "also be PURE", n
->proc_name
->name
,
12790 &n
->proc_name
->declared_at
);
12796 gfc_check_interfaces (ns
);
12798 gfc_traverse_ns (ns
, resolve_values
);
12804 for (d
= ns
->data
; d
; d
= d
->next
)
12808 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
12810 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
12812 if (ns
->common_root
!= NULL
)
12813 gfc_traverse_symtree (ns
->common_root
, resolve_bind_c_comms
);
12815 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
12816 resolve_equivalence (eq
);
12818 /* Warn about unused labels. */
12819 if (warn_unused_label
)
12820 warn_unused_fortran_label (ns
->st_labels
);
12822 gfc_resolve_uops (ns
->uop_root
);
12824 gfc_current_ns
= old_ns
;
12828 /* Call resolve_code recursively. */
12831 resolve_codes (gfc_namespace
*ns
)
12834 bitmap_obstack old_obstack
;
12836 for (n
= ns
->contained
; n
; n
= n
->sibling
)
12839 gfc_current_ns
= ns
;
12841 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
12842 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
12845 /* Set to an out of range value. */
12846 current_entry_id
= -1;
12848 old_obstack
= labels_obstack
;
12849 bitmap_obstack_initialize (&labels_obstack
);
12851 resolve_code (ns
->code
, ns
);
12853 bitmap_obstack_release (&labels_obstack
);
12854 labels_obstack
= old_obstack
;
12858 /* This function is called after a complete program unit has been compiled.
12859 Its purpose is to examine all of the expressions associated with a program
12860 unit, assign types to all intermediate expressions, make sure that all
12861 assignments are to compatible types and figure out which names refer to
12862 which functions or subroutines. */
12865 gfc_resolve (gfc_namespace
*ns
)
12867 gfc_namespace
*old_ns
;
12868 code_stack
*old_cs_base
;
12874 old_ns
= gfc_current_ns
;
12875 old_cs_base
= cs_base
;
12877 resolve_types (ns
);
12878 resolve_codes (ns
);
12880 gfc_current_ns
= old_ns
;
12881 cs_base
= old_cs_base
;