1 /* Maintain binary trees of symbols.
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "constructor.h"
32 /* Strings for all symbol attributes. We use these for dumping the
33 parse tree, in error messages, and also when reading and writing
36 const mstring flavors
[] =
38 minit ("UNKNOWN-FL", FL_UNKNOWN
), minit ("PROGRAM", FL_PROGRAM
),
39 minit ("BLOCK-DATA", FL_BLOCK_DATA
), minit ("MODULE", FL_MODULE
),
40 minit ("VARIABLE", FL_VARIABLE
), minit ("PARAMETER", FL_PARAMETER
),
41 minit ("LABEL", FL_LABEL
), minit ("PROCEDURE", FL_PROCEDURE
),
42 minit ("DERIVED", FL_DERIVED
), minit ("NAMELIST", FL_NAMELIST
),
43 minit ("UNION", FL_UNION
), minit ("STRUCTURE", FL_STRUCT
),
47 const mstring procedures
[] =
49 minit ("UNKNOWN-PROC", PROC_UNKNOWN
),
50 minit ("MODULE-PROC", PROC_MODULE
),
51 minit ("INTERNAL-PROC", PROC_INTERNAL
),
52 minit ("DUMMY-PROC", PROC_DUMMY
),
53 minit ("INTRINSIC-PROC", PROC_INTRINSIC
),
54 minit ("EXTERNAL-PROC", PROC_EXTERNAL
),
55 minit ("STATEMENT-PROC", PROC_ST_FUNCTION
),
59 const mstring intents
[] =
61 minit ("UNKNOWN-INTENT", INTENT_UNKNOWN
),
62 minit ("IN", INTENT_IN
),
63 minit ("OUT", INTENT_OUT
),
64 minit ("INOUT", INTENT_INOUT
),
68 const mstring access_types
[] =
70 minit ("UNKNOWN-ACCESS", ACCESS_UNKNOWN
),
71 minit ("PUBLIC", ACCESS_PUBLIC
),
72 minit ("PRIVATE", ACCESS_PRIVATE
),
76 const mstring ifsrc_types
[] =
78 minit ("UNKNOWN", IFSRC_UNKNOWN
),
79 minit ("DECL", IFSRC_DECL
),
80 minit ("BODY", IFSRC_IFBODY
)
83 const mstring save_status
[] =
85 minit ("UNKNOWN", SAVE_NONE
),
86 minit ("EXPLICIT-SAVE", SAVE_EXPLICIT
),
87 minit ("IMPLICIT-SAVE", SAVE_IMPLICIT
),
90 /* Set the mstrings for DTIO procedure names. */
91 const mstring dtio_procs
[] =
93 minit ("_dtio_formatted_read", DTIO_RF
),
94 minit ("_dtio_formatted_write", DTIO_WF
),
95 minit ("_dtio_unformatted_read", DTIO_RUF
),
96 minit ("_dtio_unformatted_write", DTIO_WUF
),
99 /* This is to make sure the backend generates setup code in the correct
102 static int next_dummy_order
= 1;
105 gfc_namespace
*gfc_current_ns
;
106 gfc_namespace
*gfc_global_ns_list
;
108 gfc_gsymbol
*gfc_gsym_root
= NULL
;
110 gfc_dt_list
*gfc_derived_types
;
112 static gfc_undo_change_set default_undo_chgset_var
= { vNULL
, vNULL
, NULL
};
113 static gfc_undo_change_set
*latest_undo_chgset
= &default_undo_chgset_var
;
116 /*********** IMPLICIT NONE and IMPLICIT statement handlers ***********/
118 /* The following static variable indicates whether a particular element has
119 been explicitly set or not. */
121 static int new_flag
[GFC_LETTERS
];
124 /* Handle a correctly parsed IMPLICIT NONE. */
127 gfc_set_implicit_none (bool type
, bool external
, locus
*loc
)
132 gfc_current_ns
->has_implicit_none_export
= 1;
136 gfc_current_ns
->seen_implicit_none
= 1;
137 for (i
= 0; i
< GFC_LETTERS
; i
++)
139 if (gfc_current_ns
->set_flag
[i
])
141 gfc_error_now ("IMPLICIT NONE (type) statement at %L following an "
142 "IMPLICIT statement", loc
);
145 gfc_clear_ts (&gfc_current_ns
->default_type
[i
]);
146 gfc_current_ns
->set_flag
[i
] = 1;
152 /* Reset the implicit range flags. */
155 gfc_clear_new_implicit (void)
159 for (i
= 0; i
< GFC_LETTERS
; i
++)
164 /* Prepare for a new implicit range. Sets flags in new_flag[]. */
167 gfc_add_new_implicit_range (int c1
, int c2
)
174 for (i
= c1
; i
<= c2
; i
++)
178 gfc_error ("Letter %qc already set in IMPLICIT statement at %C",
190 /* Add a matched implicit range for gfc_set_implicit(). Check if merging
191 the new implicit types back into the existing types will work. */
194 gfc_merge_new_implicit (gfc_typespec
*ts
)
198 if (gfc_current_ns
->seen_implicit_none
)
200 gfc_error ("Cannot specify IMPLICIT at %C after IMPLICIT NONE");
204 for (i
= 0; i
< GFC_LETTERS
; i
++)
208 if (gfc_current_ns
->set_flag
[i
])
210 gfc_error ("Letter %qc already has an IMPLICIT type at %C",
215 gfc_current_ns
->default_type
[i
] = *ts
;
216 gfc_current_ns
->implicit_loc
[i
] = gfc_current_locus
;
217 gfc_current_ns
->set_flag
[i
] = 1;
224 /* Given a symbol, return a pointer to the typespec for its default type. */
227 gfc_get_default_type (const char *name
, gfc_namespace
*ns
)
233 if (flag_allow_leading_underscore
&& letter
== '_')
234 gfc_fatal_error ("Option %<-fallow-leading-underscore%> is for use only by "
235 "gfortran developers, and should not be used for "
236 "implicitly typed variables");
238 if (letter
< 'a' || letter
> 'z')
239 gfc_internal_error ("gfc_get_default_type(): Bad symbol %qs", name
);
244 return &ns
->default_type
[letter
- 'a'];
248 /* Given a pointer to a symbol, set its type according to the first
249 letter of its name. Fails if the letter in question has no default
253 gfc_set_default_type (gfc_symbol
*sym
, int error_flag
, gfc_namespace
*ns
)
257 if (sym
->ts
.type
!= BT_UNKNOWN
)
258 gfc_internal_error ("gfc_set_default_type(): symbol already has a type");
260 ts
= gfc_get_default_type (sym
->name
, ns
);
262 if (ts
->type
== BT_UNKNOWN
)
264 if (error_flag
&& !sym
->attr
.untyped
)
266 gfc_error ("Symbol %qs at %L has no IMPLICIT type",
267 sym
->name
, &sym
->declared_at
);
268 sym
->attr
.untyped
= 1; /* Ensure we only give an error once. */
275 sym
->attr
.implicit_type
= 1;
277 if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
)
278 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ts
->u
.cl
);
279 else if (ts
->type
== BT_CLASS
280 && !gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
))
283 if (sym
->attr
.is_bind_c
== 1 && warn_c_binding_type
)
285 /* BIND(C) variables should not be implicitly declared. */
286 gfc_warning_now (OPT_Wc_binding_type
, "Implicitly declared BIND(C) "
287 "variable %qs at %L may not be C interoperable",
288 sym
->name
, &sym
->declared_at
);
289 sym
->ts
.f90_type
= sym
->ts
.type
;
292 if (sym
->attr
.dummy
!= 0)
294 if (sym
->ns
->proc_name
!= NULL
295 && (sym
->ns
->proc_name
->attr
.subroutine
!= 0
296 || sym
->ns
->proc_name
->attr
.function
!= 0)
297 && sym
->ns
->proc_name
->attr
.is_bind_c
!= 0
298 && warn_c_binding_type
)
300 /* Dummy args to a BIND(C) routine may not be interoperable if
301 they are implicitly typed. */
302 gfc_warning_now (OPT_Wc_binding_type
, "Implicitly declared variable "
303 "%qs at %L may not be C interoperable but it is a "
304 "dummy argument to the BIND(C) procedure %qs at %L",
305 sym
->name
, &(sym
->declared_at
),
306 sym
->ns
->proc_name
->name
,
307 &(sym
->ns
->proc_name
->declared_at
));
308 sym
->ts
.f90_type
= sym
->ts
.type
;
316 /* This function is called from parse.c(parse_progunit) to check the
317 type of the function is not implicitly typed in the host namespace
318 and to implicitly type the function result, if necessary. */
321 gfc_check_function_type (gfc_namespace
*ns
)
323 gfc_symbol
*proc
= ns
->proc_name
;
325 if (!proc
->attr
.contained
|| proc
->result
->attr
.implicit_type
)
328 if (proc
->result
->ts
.type
== BT_UNKNOWN
&& proc
->result
->ts
.interface
== NULL
)
330 if (gfc_set_default_type (proc
->result
, 0, gfc_current_ns
))
332 if (proc
->result
!= proc
)
334 proc
->ts
= proc
->result
->ts
;
335 proc
->as
= gfc_copy_array_spec (proc
->result
->as
);
336 proc
->attr
.dimension
= proc
->result
->attr
.dimension
;
337 proc
->attr
.pointer
= proc
->result
->attr
.pointer
;
338 proc
->attr
.allocatable
= proc
->result
->attr
.allocatable
;
341 else if (!proc
->result
->attr
.proc_pointer
)
343 gfc_error ("Function result %qs at %L has no IMPLICIT type",
344 proc
->result
->name
, &proc
->result
->declared_at
);
345 proc
->result
->attr
.untyped
= 1;
351 /******************** Symbol attribute stuff *********************/
353 /* This is a generic conflict-checker. We do this to avoid having a
354 single conflict in two places. */
356 #define conf(a, b) if (attr->a && attr->b) { a1 = a; a2 = b; goto conflict; }
357 #define conf2(a) if (attr->a) { a2 = a; goto conflict; }
358 #define conf_std(a, b, std) if (attr->a && attr->b)\
367 check_conflict (symbol_attribute
*attr
, const char *name
, locus
*where
)
369 static const char *dummy
= "DUMMY", *save
= "SAVE", *pointer
= "POINTER",
370 *target
= "TARGET", *external
= "EXTERNAL", *intent
= "INTENT",
371 *intent_in
= "INTENT(IN)", *intrinsic
= "INTRINSIC",
372 *intent_out
= "INTENT(OUT)", *intent_inout
= "INTENT(INOUT)",
373 *allocatable
= "ALLOCATABLE", *elemental
= "ELEMENTAL",
374 *privat
= "PRIVATE", *recursive
= "RECURSIVE",
375 *in_common
= "COMMON", *result
= "RESULT", *in_namelist
= "NAMELIST",
376 *publik
= "PUBLIC", *optional
= "OPTIONAL", *entry
= "ENTRY",
377 *function
= "FUNCTION", *subroutine
= "SUBROUTINE",
378 *dimension
= "DIMENSION", *in_equivalence
= "EQUIVALENCE",
379 *use_assoc
= "USE ASSOCIATED", *cray_pointer
= "CRAY POINTER",
380 *cray_pointee
= "CRAY POINTEE", *data
= "DATA", *value
= "VALUE",
381 *volatile_
= "VOLATILE", *is_protected
= "PROTECTED",
382 *is_bind_c
= "BIND(C)", *procedure
= "PROCEDURE",
383 *proc_pointer
= "PROCEDURE POINTER", *abstract
= "ABSTRACT",
384 *asynchronous
= "ASYNCHRONOUS", *codimension
= "CODIMENSION",
385 *contiguous
= "CONTIGUOUS", *generic
= "GENERIC", *automatic
= "AUTOMATIC";
386 static const char *threadprivate
= "THREADPRIVATE";
387 static const char *omp_declare_target
= "OMP DECLARE TARGET";
388 static const char *omp_declare_target_link
= "OMP DECLARE TARGET LINK";
389 static const char *oacc_declare_copyin
= "OACC DECLARE COPYIN";
390 static const char *oacc_declare_create
= "OACC DECLARE CREATE";
391 static const char *oacc_declare_deviceptr
= "OACC DECLARE DEVICEPTR";
392 static const char *oacc_declare_device_resident
=
393 "OACC DECLARE DEVICE_RESIDENT";
399 where
= &gfc_current_locus
;
401 if (attr
->pointer
&& attr
->intent
!= INTENT_UNKNOWN
)
405 standard
= GFC_STD_F2003
;
409 if (attr
->in_namelist
&& (attr
->allocatable
|| attr
->pointer
))
412 a2
= attr
->allocatable
? allocatable
: pointer
;
413 standard
= GFC_STD_F2003
;
417 /* Check for attributes not allowed in a BLOCK DATA. */
418 if (gfc_current_state () == COMP_BLOCK_DATA
)
422 if (attr
->in_namelist
)
424 if (attr
->allocatable
)
430 if (attr
->access
== ACCESS_PRIVATE
)
432 if (attr
->access
== ACCESS_PUBLIC
)
434 if (attr
->intent
!= INTENT_UNKNOWN
)
440 ("%s attribute not allowed in BLOCK DATA program unit at %L",
446 if (attr
->save
== SAVE_EXPLICIT
)
449 conf (in_common
, save
);
451 conf (automatic
, save
);
453 switch (attr
->flavor
)
461 a1
= gfc_code2string (flavors
, attr
->flavor
);
465 gfc_error ("Namelist group name at %L cannot have the "
466 "SAVE attribute", where
);
469 /* Conflicts between SAVE and PROCEDURE will be checked at
470 resolution stage, see "resolve_fl_procedure". */
477 if (attr
->dummy
&& ((attr
->function
|| attr
->subroutine
) &&
478 gfc_current_state () == COMP_CONTAINS
))
479 gfc_error_now ("internal procedure %qs at %L conflicts with "
480 "DUMMY argument", name
, where
);
483 conf (dummy
, intrinsic
);
484 conf (dummy
, threadprivate
);
485 conf (dummy
, omp_declare_target
);
486 conf (dummy
, omp_declare_target_link
);
487 conf (pointer
, target
);
488 conf (pointer
, intrinsic
);
489 conf (pointer
, elemental
);
490 conf (pointer
, codimension
);
491 conf (allocatable
, elemental
);
493 conf (in_common
, automatic
);
494 conf (in_equivalence
, automatic
);
495 conf (result
, automatic
);
496 conf (use_assoc
, automatic
);
497 conf (dummy
, automatic
);
499 conf (target
, external
);
500 conf (target
, intrinsic
);
502 if (!attr
->if_source
)
503 conf (external
, dimension
); /* See Fortran 95's R504. */
505 conf (external
, intrinsic
);
506 conf (entry
, intrinsic
);
508 if ((attr
->if_source
== IFSRC_DECL
&& !attr
->procedure
) || attr
->contained
)
509 conf (external
, subroutine
);
511 if (attr
->proc_pointer
&& !gfc_notify_std (GFC_STD_F2003
,
512 "Procedure pointer at %C"))
515 conf (allocatable
, pointer
);
516 conf_std (allocatable
, dummy
, GFC_STD_F2003
);
517 conf_std (allocatable
, function
, GFC_STD_F2003
);
518 conf_std (allocatable
, result
, GFC_STD_F2003
);
519 conf (elemental
, recursive
);
521 conf (in_common
, dummy
);
522 conf (in_common
, allocatable
);
523 conf (in_common
, codimension
);
524 conf (in_common
, result
);
526 conf (in_equivalence
, use_assoc
);
527 conf (in_equivalence
, codimension
);
528 conf (in_equivalence
, dummy
);
529 conf (in_equivalence
, target
);
530 conf (in_equivalence
, pointer
);
531 conf (in_equivalence
, function
);
532 conf (in_equivalence
, result
);
533 conf (in_equivalence
, entry
);
534 conf (in_equivalence
, allocatable
);
535 conf (in_equivalence
, threadprivate
);
536 conf (in_equivalence
, omp_declare_target
);
537 conf (in_equivalence
, omp_declare_target_link
);
538 conf (in_equivalence
, oacc_declare_create
);
539 conf (in_equivalence
, oacc_declare_copyin
);
540 conf (in_equivalence
, oacc_declare_deviceptr
);
541 conf (in_equivalence
, oacc_declare_device_resident
);
543 conf (dummy
, result
);
544 conf (entry
, result
);
545 conf (generic
, result
);
546 conf (generic
, omp_declare_target
);
547 conf (generic
, omp_declare_target_link
);
549 conf (function
, subroutine
);
551 if (!function
&& !subroutine
)
552 conf (is_bind_c
, dummy
);
554 conf (is_bind_c
, cray_pointer
);
555 conf (is_bind_c
, cray_pointee
);
556 conf (is_bind_c
, codimension
);
557 conf (is_bind_c
, allocatable
);
558 conf (is_bind_c
, elemental
);
560 /* Need to also get volatile attr, according to 5.1 of F2003 draft.
561 Parameter conflict caught below. Also, value cannot be specified
562 for a dummy procedure. */
564 /* Cray pointer/pointee conflicts. */
565 conf (cray_pointer
, cray_pointee
);
566 conf (cray_pointer
, dimension
);
567 conf (cray_pointer
, codimension
);
568 conf (cray_pointer
, contiguous
);
569 conf (cray_pointer
, pointer
);
570 conf (cray_pointer
, target
);
571 conf (cray_pointer
, allocatable
);
572 conf (cray_pointer
, external
);
573 conf (cray_pointer
, intrinsic
);
574 conf (cray_pointer
, in_namelist
);
575 conf (cray_pointer
, function
);
576 conf (cray_pointer
, subroutine
);
577 conf (cray_pointer
, entry
);
579 conf (cray_pointee
, allocatable
);
580 conf (cray_pointee
, contiguous
);
581 conf (cray_pointee
, codimension
);
582 conf (cray_pointee
, intent
);
583 conf (cray_pointee
, optional
);
584 conf (cray_pointee
, dummy
);
585 conf (cray_pointee
, target
);
586 conf (cray_pointee
, intrinsic
);
587 conf (cray_pointee
, pointer
);
588 conf (cray_pointee
, entry
);
589 conf (cray_pointee
, in_common
);
590 conf (cray_pointee
, in_equivalence
);
591 conf (cray_pointee
, threadprivate
);
592 conf (cray_pointee
, omp_declare_target
);
593 conf (cray_pointee
, omp_declare_target_link
);
594 conf (cray_pointee
, oacc_declare_create
);
595 conf (cray_pointee
, oacc_declare_copyin
);
596 conf (cray_pointee
, oacc_declare_deviceptr
);
597 conf (cray_pointee
, oacc_declare_device_resident
);
600 conf (data
, function
);
602 conf (data
, allocatable
);
604 conf (value
, pointer
)
605 conf (value
, allocatable
)
606 conf (value
, subroutine
)
607 conf (value
, function
)
608 conf (value
, volatile_
)
609 conf (value
, dimension
)
610 conf (value
, codimension
)
611 conf (value
, external
)
613 conf (codimension
, result
)
616 && (attr
->intent
== INTENT_OUT
|| attr
->intent
== INTENT_INOUT
))
619 a2
= attr
->intent
== INTENT_OUT
? intent_out
: intent_inout
;
623 conf (is_protected
, intrinsic
)
624 conf (is_protected
, in_common
)
626 conf (asynchronous
, intrinsic
)
627 conf (asynchronous
, external
)
629 conf (volatile_
, intrinsic
)
630 conf (volatile_
, external
)
632 if (attr
->volatile_
&& attr
->intent
== INTENT_IN
)
639 conf (procedure
, allocatable
)
640 conf (procedure
, dimension
)
641 conf (procedure
, codimension
)
642 conf (procedure
, intrinsic
)
643 conf (procedure
, target
)
644 conf (procedure
, value
)
645 conf (procedure
, volatile_
)
646 conf (procedure
, asynchronous
)
647 conf (procedure
, entry
)
649 conf (proc_pointer
, abstract
)
650 conf (proc_pointer
, omp_declare_target
)
651 conf (proc_pointer
, omp_declare_target_link
)
653 conf (entry
, omp_declare_target
)
654 conf (entry
, omp_declare_target_link
)
655 conf (entry
, oacc_declare_create
)
656 conf (entry
, oacc_declare_copyin
)
657 conf (entry
, oacc_declare_deviceptr
)
658 conf (entry
, oacc_declare_device_resident
)
660 a1
= gfc_code2string (flavors
, attr
->flavor
);
662 if (attr
->in_namelist
663 && attr
->flavor
!= FL_VARIABLE
664 && attr
->flavor
!= FL_PROCEDURE
665 && attr
->flavor
!= FL_UNKNOWN
)
671 switch (attr
->flavor
)
681 conf2 (asynchronous
);
684 conf2 (is_protected
);
694 conf2 (threadprivate
);
695 conf2 (omp_declare_target
);
696 conf2 (omp_declare_target_link
);
697 conf2 (oacc_declare_create
);
698 conf2 (oacc_declare_copyin
);
699 conf2 (oacc_declare_deviceptr
);
700 conf2 (oacc_declare_device_resident
);
702 if (attr
->access
== ACCESS_PUBLIC
|| attr
->access
== ACCESS_PRIVATE
)
704 a2
= attr
->access
== ACCESS_PUBLIC
? publik
: privat
;
705 gfc_error ("%s attribute applied to %s %s at %L", a2
, a1
,
712 gfc_error_now ("BIND(C) applied to %s %s at %L", a1
, name
, where
);
726 /* Conflicts with INTENT, SAVE and RESULT will be checked
727 at resolution stage, see "resolve_fl_procedure". */
729 if (attr
->subroutine
)
735 conf2 (asynchronous
);
740 if (!attr
->proc_pointer
)
741 conf2 (threadprivate
);
744 if (!attr
->proc_pointer
)
747 conf2 (omp_declare_target_link
);
751 case PROC_ST_FUNCTION
:
762 conf2 (threadprivate
);
782 conf2 (threadprivate
);
784 conf2 (omp_declare_target
);
785 conf2 (omp_declare_target_link
);
786 conf2 (oacc_declare_create
);
787 conf2 (oacc_declare_copyin
);
788 conf2 (oacc_declare_deviceptr
);
789 conf2 (oacc_declare_device_resident
);
791 if (attr
->intent
!= INTENT_UNKNOWN
)
808 conf2 (is_protected
);
814 conf2 (asynchronous
);
815 conf2 (threadprivate
);
831 gfc_error ("%s attribute conflicts with %s attribute at %L",
834 gfc_error ("%s attribute conflicts with %s attribute in %qs at %L",
835 a1
, a2
, name
, where
);
842 return gfc_notify_std (standard
, "%s attribute "
843 "with %s attribute at %L", a1
, a2
,
848 return gfc_notify_std (standard
, "%s attribute "
849 "with %s attribute in %qs at %L",
850 a1
, a2
, name
, where
);
859 /* Mark a symbol as referenced. */
862 gfc_set_sym_referenced (gfc_symbol
*sym
)
865 if (sym
->attr
.referenced
)
868 sym
->attr
.referenced
= 1;
870 /* Remember which order dummy variables are accessed in. */
872 sym
->dummy_order
= next_dummy_order
++;
876 /* Common subroutine called by attribute changing subroutines in order
877 to prevent them from changing a symbol that has been
878 use-associated. Returns zero if it is OK to change the symbol,
882 check_used (symbol_attribute
*attr
, const char *name
, locus
*where
)
885 if (attr
->use_assoc
== 0)
889 where
= &gfc_current_locus
;
892 gfc_error ("Cannot change attributes of USE-associated symbol at %L",
895 gfc_error ("Cannot change attributes of USE-associated symbol %s at %L",
902 /* Generate an error because of a duplicate attribute. */
905 duplicate_attr (const char *attr
, locus
*where
)
909 where
= &gfc_current_locus
;
911 gfc_error ("Duplicate %s attribute specified at %L", attr
, where
);
916 gfc_add_ext_attribute (symbol_attribute
*attr
, ext_attr_id_t ext_attr
,
917 locus
*where ATTRIBUTE_UNUSED
)
919 attr
->ext_attr
|= 1 << ext_attr
;
924 /* Called from decl.c (attr_decl1) to check attributes, when declared
928 gfc_add_attribute (symbol_attribute
*attr
, locus
*where
)
930 if (check_used (attr
, NULL
, where
))
933 return check_conflict (attr
, NULL
, where
);
938 gfc_add_allocatable (symbol_attribute
*attr
, locus
*where
)
941 if (check_used (attr
, NULL
, where
))
944 if (attr
->allocatable
)
946 duplicate_attr ("ALLOCATABLE", where
);
950 if (attr
->flavor
== FL_PROCEDURE
&& attr
->if_source
== IFSRC_IFBODY
951 && !gfc_find_state (COMP_INTERFACE
))
953 gfc_error ("ALLOCATABLE specified outside of INTERFACE body at %L",
958 attr
->allocatable
= 1;
959 return check_conflict (attr
, NULL
, where
);
964 gfc_add_automatic (symbol_attribute
*attr
, const char *name
, locus
*where
)
966 if (check_used (attr
, name
, where
))
969 if (attr
->automatic
&& !gfc_notify_std (GFC_STD_LEGACY
,
970 "Duplicate AUTOMATIC attribute specified at %L", where
))
974 return check_conflict (attr
, name
, where
);
979 gfc_add_codimension (symbol_attribute
*attr
, const char *name
, locus
*where
)
982 if (check_used (attr
, name
, where
))
985 if (attr
->codimension
)
987 duplicate_attr ("CODIMENSION", where
);
991 if (attr
->flavor
== FL_PROCEDURE
&& attr
->if_source
== IFSRC_IFBODY
992 && !gfc_find_state (COMP_INTERFACE
))
994 gfc_error ("CODIMENSION specified for %qs outside its INTERFACE body "
995 "at %L", name
, where
);
999 attr
->codimension
= 1;
1000 return check_conflict (attr
, name
, where
);
1005 gfc_add_dimension (symbol_attribute
*attr
, const char *name
, locus
*where
)
1008 if (check_used (attr
, name
, where
))
1011 if (attr
->dimension
)
1013 duplicate_attr ("DIMENSION", where
);
1017 if (attr
->flavor
== FL_PROCEDURE
&& attr
->if_source
== IFSRC_IFBODY
1018 && !gfc_find_state (COMP_INTERFACE
))
1020 gfc_error ("DIMENSION specified for %qs outside its INTERFACE body "
1021 "at %L", name
, where
);
1025 attr
->dimension
= 1;
1026 return check_conflict (attr
, name
, where
);
1031 gfc_add_contiguous (symbol_attribute
*attr
, const char *name
, locus
*where
)
1034 if (check_used (attr
, name
, where
))
1037 attr
->contiguous
= 1;
1038 return check_conflict (attr
, name
, where
);
1043 gfc_add_external (symbol_attribute
*attr
, locus
*where
)
1046 if (check_used (attr
, NULL
, where
))
1051 duplicate_attr ("EXTERNAL", where
);
1055 if (attr
->pointer
&& attr
->if_source
!= IFSRC_IFBODY
)
1058 attr
->proc_pointer
= 1;
1063 return check_conflict (attr
, NULL
, where
);
1068 gfc_add_intrinsic (symbol_attribute
*attr
, locus
*where
)
1071 if (check_used (attr
, NULL
, where
))
1074 if (attr
->intrinsic
)
1076 duplicate_attr ("INTRINSIC", where
);
1080 attr
->intrinsic
= 1;
1082 return check_conflict (attr
, NULL
, where
);
1087 gfc_add_optional (symbol_attribute
*attr
, locus
*where
)
1090 if (check_used (attr
, NULL
, where
))
1095 duplicate_attr ("OPTIONAL", where
);
1100 return check_conflict (attr
, NULL
, where
);
1105 gfc_add_pointer (symbol_attribute
*attr
, locus
*where
)
1108 if (check_used (attr
, NULL
, where
))
1111 if (attr
->pointer
&& !(attr
->if_source
== IFSRC_IFBODY
1112 && !gfc_find_state (COMP_INTERFACE
)))
1114 duplicate_attr ("POINTER", where
);
1118 if (attr
->procedure
|| (attr
->external
&& attr
->if_source
!= IFSRC_IFBODY
)
1119 || (attr
->if_source
== IFSRC_IFBODY
1120 && !gfc_find_state (COMP_INTERFACE
)))
1121 attr
->proc_pointer
= 1;
1125 return check_conflict (attr
, NULL
, where
);
1130 gfc_add_cray_pointer (symbol_attribute
*attr
, locus
*where
)
1133 if (check_used (attr
, NULL
, where
))
1136 attr
->cray_pointer
= 1;
1137 return check_conflict (attr
, NULL
, where
);
1142 gfc_add_cray_pointee (symbol_attribute
*attr
, locus
*where
)
1145 if (check_used (attr
, NULL
, where
))
1148 if (attr
->cray_pointee
)
1150 gfc_error ("Cray Pointee at %L appears in multiple pointer()"
1151 " statements", where
);
1155 attr
->cray_pointee
= 1;
1156 return check_conflict (attr
, NULL
, where
);
1161 gfc_add_protected (symbol_attribute
*attr
, const char *name
, locus
*where
)
1163 if (check_used (attr
, name
, where
))
1166 if (attr
->is_protected
)
1168 if (!gfc_notify_std (GFC_STD_LEGACY
,
1169 "Duplicate PROTECTED attribute specified at %L",
1174 attr
->is_protected
= 1;
1175 return check_conflict (attr
, name
, where
);
1180 gfc_add_result (symbol_attribute
*attr
, const char *name
, locus
*where
)
1183 if (check_used (attr
, name
, where
))
1187 return check_conflict (attr
, name
, where
);
1192 gfc_add_save (symbol_attribute
*attr
, save_state s
, const char *name
,
1196 if (check_used (attr
, name
, where
))
1199 if (s
== SAVE_EXPLICIT
&& gfc_pure (NULL
))
1202 ("SAVE attribute at %L cannot be specified in a PURE procedure",
1207 if (s
== SAVE_EXPLICIT
)
1208 gfc_unset_implicit_pure (NULL
);
1210 if (s
== SAVE_EXPLICIT
&& attr
->save
== SAVE_EXPLICIT
)
1212 if (!gfc_notify_std (GFC_STD_LEGACY
,
1213 "Duplicate SAVE attribute specified at %L",
1219 return check_conflict (attr
, name
, where
);
1224 gfc_add_value (symbol_attribute
*attr
, const char *name
, locus
*where
)
1227 if (check_used (attr
, name
, where
))
1232 if (!gfc_notify_std (GFC_STD_LEGACY
,
1233 "Duplicate VALUE attribute specified at %L",
1239 return check_conflict (attr
, name
, where
);
1244 gfc_add_volatile (symbol_attribute
*attr
, const char *name
, locus
*where
)
1246 /* No check_used needed as 11.2.1 of the F2003 standard allows
1247 that the local identifier made accessible by a use statement can be
1248 given a VOLATILE attribute - unless it is a coarray (F2008, C560). */
1250 if (attr
->volatile_
&& attr
->volatile_ns
== gfc_current_ns
)
1251 if (!gfc_notify_std (GFC_STD_LEGACY
,
1252 "Duplicate VOLATILE attribute specified at %L",
1256 attr
->volatile_
= 1;
1257 attr
->volatile_ns
= gfc_current_ns
;
1258 return check_conflict (attr
, name
, where
);
1263 gfc_add_asynchronous (symbol_attribute
*attr
, const char *name
, locus
*where
)
1265 /* No check_used needed as 11.2.1 of the F2003 standard allows
1266 that the local identifier made accessible by a use statement can be
1267 given a ASYNCHRONOUS attribute. */
1269 if (attr
->asynchronous
&& attr
->asynchronous_ns
== gfc_current_ns
)
1270 if (!gfc_notify_std (GFC_STD_LEGACY
,
1271 "Duplicate ASYNCHRONOUS attribute specified at %L",
1275 attr
->asynchronous
= 1;
1276 attr
->asynchronous_ns
= gfc_current_ns
;
1277 return check_conflict (attr
, name
, where
);
1282 gfc_add_threadprivate (symbol_attribute
*attr
, const char *name
, locus
*where
)
1285 if (check_used (attr
, name
, where
))
1288 if (attr
->threadprivate
)
1290 duplicate_attr ("THREADPRIVATE", where
);
1294 attr
->threadprivate
= 1;
1295 return check_conflict (attr
, name
, where
);
1300 gfc_add_omp_declare_target (symbol_attribute
*attr
, const char *name
,
1304 if (check_used (attr
, name
, where
))
1307 if (attr
->omp_declare_target
)
1310 attr
->omp_declare_target
= 1;
1311 return check_conflict (attr
, name
, where
);
1316 gfc_add_omp_declare_target_link (symbol_attribute
*attr
, const char *name
,
1320 if (check_used (attr
, name
, where
))
1323 if (attr
->omp_declare_target_link
)
1326 attr
->omp_declare_target_link
= 1;
1327 return check_conflict (attr
, name
, where
);
1332 gfc_add_oacc_declare_create (symbol_attribute
*attr
, const char *name
,
1335 if (check_used (attr
, name
, where
))
1338 if (attr
->oacc_declare_create
)
1341 attr
->oacc_declare_create
= 1;
1342 return check_conflict (attr
, name
, where
);
1347 gfc_add_oacc_declare_copyin (symbol_attribute
*attr
, const char *name
,
1350 if (check_used (attr
, name
, where
))
1353 if (attr
->oacc_declare_copyin
)
1356 attr
->oacc_declare_copyin
= 1;
1357 return check_conflict (attr
, name
, where
);
1362 gfc_add_oacc_declare_deviceptr (symbol_attribute
*attr
, const char *name
,
1365 if (check_used (attr
, name
, where
))
1368 if (attr
->oacc_declare_deviceptr
)
1371 attr
->oacc_declare_deviceptr
= 1;
1372 return check_conflict (attr
, name
, where
);
1377 gfc_add_oacc_declare_device_resident (symbol_attribute
*attr
, const char *name
,
1380 if (check_used (attr
, name
, where
))
1383 if (attr
->oacc_declare_device_resident
)
1386 attr
->oacc_declare_device_resident
= 1;
1387 return check_conflict (attr
, name
, where
);
1392 gfc_add_target (symbol_attribute
*attr
, locus
*where
)
1395 if (check_used (attr
, NULL
, where
))
1400 duplicate_attr ("TARGET", where
);
1405 return check_conflict (attr
, NULL
, where
);
1410 gfc_add_dummy (symbol_attribute
*attr
, const char *name
, locus
*where
)
1413 if (check_used (attr
, name
, where
))
1416 /* Duplicate dummy arguments are allowed due to ENTRY statements. */
1418 return check_conflict (attr
, name
, where
);
1423 gfc_add_in_common (symbol_attribute
*attr
, const char *name
, locus
*where
)
1426 if (check_used (attr
, name
, where
))
1429 /* Duplicate attribute already checked for. */
1430 attr
->in_common
= 1;
1431 return check_conflict (attr
, name
, where
);
1436 gfc_add_in_equivalence (symbol_attribute
*attr
, const char *name
, locus
*where
)
1439 /* Duplicate attribute already checked for. */
1440 attr
->in_equivalence
= 1;
1441 if (!check_conflict (attr
, name
, where
))
1444 if (attr
->flavor
== FL_VARIABLE
)
1447 return gfc_add_flavor (attr
, FL_VARIABLE
, name
, where
);
1452 gfc_add_data (symbol_attribute
*attr
, const char *name
, locus
*where
)
1455 if (check_used (attr
, name
, where
))
1459 return check_conflict (attr
, name
, where
);
1464 gfc_add_in_namelist (symbol_attribute
*attr
, const char *name
, locus
*where
)
1467 attr
->in_namelist
= 1;
1468 return check_conflict (attr
, name
, where
);
1473 gfc_add_sequence (symbol_attribute
*attr
, const char *name
, locus
*where
)
1476 if (check_used (attr
, name
, where
))
1480 return check_conflict (attr
, name
, where
);
1485 gfc_add_elemental (symbol_attribute
*attr
, locus
*where
)
1488 if (check_used (attr
, NULL
, where
))
1491 if (attr
->elemental
)
1493 duplicate_attr ("ELEMENTAL", where
);
1497 attr
->elemental
= 1;
1498 return check_conflict (attr
, NULL
, where
);
1503 gfc_add_pure (symbol_attribute
*attr
, locus
*where
)
1506 if (check_used (attr
, NULL
, where
))
1511 duplicate_attr ("PURE", where
);
1516 return check_conflict (attr
, NULL
, where
);
1521 gfc_add_recursive (symbol_attribute
*attr
, locus
*where
)
1524 if (check_used (attr
, NULL
, where
))
1527 if (attr
->recursive
)
1529 duplicate_attr ("RECURSIVE", where
);
1533 attr
->recursive
= 1;
1534 return check_conflict (attr
, NULL
, where
);
1539 gfc_add_entry (symbol_attribute
*attr
, const char *name
, locus
*where
)
1542 if (check_used (attr
, name
, where
))
1547 duplicate_attr ("ENTRY", where
);
1552 return check_conflict (attr
, name
, where
);
1557 gfc_add_function (symbol_attribute
*attr
, const char *name
, locus
*where
)
1560 if (attr
->flavor
!= FL_PROCEDURE
1561 && !gfc_add_flavor (attr
, FL_PROCEDURE
, name
, where
))
1565 return check_conflict (attr
, name
, where
);
1570 gfc_add_subroutine (symbol_attribute
*attr
, const char *name
, locus
*where
)
1573 if (attr
->flavor
!= FL_PROCEDURE
1574 && !gfc_add_flavor (attr
, FL_PROCEDURE
, name
, where
))
1577 attr
->subroutine
= 1;
1578 return check_conflict (attr
, name
, where
);
1583 gfc_add_generic (symbol_attribute
*attr
, const char *name
, locus
*where
)
1586 if (attr
->flavor
!= FL_PROCEDURE
1587 && !gfc_add_flavor (attr
, FL_PROCEDURE
, name
, where
))
1591 return check_conflict (attr
, name
, where
);
1596 gfc_add_proc (symbol_attribute
*attr
, const char *name
, locus
*where
)
1599 if (check_used (attr
, NULL
, where
))
1602 if (attr
->flavor
!= FL_PROCEDURE
1603 && !gfc_add_flavor (attr
, FL_PROCEDURE
, name
, where
))
1606 if (attr
->procedure
)
1608 duplicate_attr ("PROCEDURE", where
);
1612 attr
->procedure
= 1;
1614 return check_conflict (attr
, NULL
, where
);
1619 gfc_add_abstract (symbol_attribute
* attr
, locus
* where
)
1623 duplicate_attr ("ABSTRACT", where
);
1629 return check_conflict (attr
, NULL
, where
);
1633 /* Flavors are special because some flavors are not what Fortran
1634 considers attributes and can be reaffirmed multiple times. */
1637 gfc_add_flavor (symbol_attribute
*attr
, sym_flavor f
, const char *name
,
1641 if ((f
== FL_PROGRAM
|| f
== FL_BLOCK_DATA
|| f
== FL_MODULE
1642 || f
== FL_PARAMETER
|| f
== FL_LABEL
|| gfc_fl_struct(f
)
1643 || f
== FL_NAMELIST
) && check_used (attr
, name
, where
))
1646 if (attr
->flavor
== f
&& f
== FL_VARIABLE
)
1649 if (attr
->flavor
!= FL_UNKNOWN
)
1652 where
= &gfc_current_locus
;
1655 gfc_error ("%s attribute of %qs conflicts with %s attribute at %L",
1656 gfc_code2string (flavors
, attr
->flavor
), name
,
1657 gfc_code2string (flavors
, f
), where
);
1659 gfc_error ("%s attribute conflicts with %s attribute at %L",
1660 gfc_code2string (flavors
, attr
->flavor
),
1661 gfc_code2string (flavors
, f
), where
);
1668 return check_conflict (attr
, name
, where
);
1673 gfc_add_procedure (symbol_attribute
*attr
, procedure_type t
,
1674 const char *name
, locus
*where
)
1677 if (check_used (attr
, name
, where
))
1680 if (attr
->flavor
!= FL_PROCEDURE
1681 && !gfc_add_flavor (attr
, FL_PROCEDURE
, name
, where
))
1685 where
= &gfc_current_locus
;
1687 if (attr
->proc
!= PROC_UNKNOWN
&& !attr
->module_procedure
)
1689 if (attr
->proc
== PROC_ST_FUNCTION
&& t
== PROC_INTERNAL
1690 && !gfc_notification_std (GFC_STD_F2008
))
1691 gfc_error ("%s procedure at %L is already declared as %s "
1692 "procedure. \nF2008: A pointer function assignment "
1693 "is ambiguous if it is the first executable statement "
1694 "after the specification block. Please add any other "
1695 "kind of executable statement before it. FIXME",
1696 gfc_code2string (procedures
, t
), where
,
1697 gfc_code2string (procedures
, attr
->proc
));
1699 gfc_error ("%s procedure at %L is already declared as %s "
1700 "procedure", gfc_code2string (procedures
, t
), where
,
1701 gfc_code2string (procedures
, attr
->proc
));
1708 /* Statement functions are always scalar and functions. */
1709 if (t
== PROC_ST_FUNCTION
1710 && ((!attr
->function
&& !gfc_add_function (attr
, name
, where
))
1711 || attr
->dimension
))
1714 return check_conflict (attr
, name
, where
);
1719 gfc_add_intent (symbol_attribute
*attr
, sym_intent intent
, locus
*where
)
1722 if (check_used (attr
, NULL
, where
))
1725 if (attr
->intent
== INTENT_UNKNOWN
)
1727 attr
->intent
= intent
;
1728 return check_conflict (attr
, NULL
, where
);
1732 where
= &gfc_current_locus
;
1734 gfc_error ("INTENT (%s) conflicts with INTENT(%s) at %L",
1735 gfc_intent_string (attr
->intent
),
1736 gfc_intent_string (intent
), where
);
1742 /* No checks for use-association in public and private statements. */
1745 gfc_add_access (symbol_attribute
*attr
, gfc_access access
,
1746 const char *name
, locus
*where
)
1749 if (attr
->access
== ACCESS_UNKNOWN
1750 || (attr
->use_assoc
&& attr
->access
!= ACCESS_PRIVATE
))
1752 attr
->access
= access
;
1753 return check_conflict (attr
, name
, where
);
1757 where
= &gfc_current_locus
;
1758 gfc_error ("ACCESS specification at %L was already specified", where
);
1764 /* Set the is_bind_c field for the given symbol_attribute. */
1767 gfc_add_is_bind_c (symbol_attribute
*attr
, const char *name
, locus
*where
,
1768 int is_proc_lang_bind_spec
)
1771 if (is_proc_lang_bind_spec
== 0 && attr
->flavor
== FL_PROCEDURE
)
1772 gfc_error_now ("BIND(C) attribute at %L can only be used for "
1773 "variables or common blocks", where
);
1774 else if (attr
->is_bind_c
)
1775 gfc_error_now ("Duplicate BIND attribute specified at %L", where
);
1777 attr
->is_bind_c
= 1;
1780 where
= &gfc_current_locus
;
1782 if (!gfc_notify_std (GFC_STD_F2003
, "BIND(C) at %L", where
))
1785 return check_conflict (attr
, name
, where
);
1789 /* Set the extension field for the given symbol_attribute. */
1792 gfc_add_extension (symbol_attribute
*attr
, locus
*where
)
1795 where
= &gfc_current_locus
;
1797 if (attr
->extension
)
1798 gfc_error_now ("Duplicate EXTENDS attribute specified at %L", where
);
1800 attr
->extension
= 1;
1802 if (!gfc_notify_std (GFC_STD_F2003
, "EXTENDS at %L", where
))
1810 gfc_add_explicit_interface (gfc_symbol
*sym
, ifsrc source
,
1811 gfc_formal_arglist
* formal
, locus
*where
)
1813 if (check_used (&sym
->attr
, sym
->name
, where
))
1816 /* Skip the following checks in the case of a module_procedures in a
1817 submodule since they will manifestly fail. */
1818 if (sym
->attr
.module_procedure
== 1
1819 && source
== IFSRC_DECL
)
1823 where
= &gfc_current_locus
;
1825 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
1826 && sym
->attr
.if_source
!= IFSRC_DECL
)
1828 gfc_error ("Symbol %qs at %L already has an explicit interface",
1833 if (source
== IFSRC_IFBODY
&& (sym
->attr
.dimension
|| sym
->attr
.allocatable
))
1835 gfc_error ("%qs at %L has attributes specified outside its INTERFACE "
1836 "body", sym
->name
, where
);
1841 sym
->formal
= formal
;
1842 sym
->attr
.if_source
= source
;
1848 /* Add a type to a symbol. */
1851 gfc_add_type (gfc_symbol
*sym
, gfc_typespec
*ts
, locus
*where
)
1857 where
= &gfc_current_locus
;
1860 type
= sym
->result
->ts
.type
;
1862 type
= sym
->ts
.type
;
1864 if (sym
->attr
.result
&& type
== BT_UNKNOWN
&& sym
->ns
->proc_name
)
1865 type
= sym
->ns
->proc_name
->ts
.type
;
1867 if (type
!= BT_UNKNOWN
&& !(sym
->attr
.function
&& sym
->attr
.implicit_type
)
1868 && !(gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
1869 && gfc_state_stack
->previous
->previous
->state
== COMP_SUBMODULE
)
1870 && !sym
->attr
.module_procedure
)
1872 if (sym
->attr
.use_assoc
)
1873 gfc_error ("Symbol %qs at %L conflicts with symbol from module %qs, "
1874 "use-associated at %L", sym
->name
, where
, sym
->module
,
1877 gfc_error ("Symbol %qs at %L already has basic type of %s", sym
->name
,
1878 where
, gfc_basic_typename (type
));
1882 if (sym
->attr
.procedure
&& sym
->ts
.interface
)
1884 gfc_error ("Procedure %qs at %L may not have basic type of %s",
1885 sym
->name
, where
, gfc_basic_typename (ts
->type
));
1889 flavor
= sym
->attr
.flavor
;
1891 if (flavor
== FL_PROGRAM
|| flavor
== FL_BLOCK_DATA
|| flavor
== FL_MODULE
1892 || flavor
== FL_LABEL
1893 || (flavor
== FL_PROCEDURE
&& sym
->attr
.subroutine
)
1894 || flavor
== FL_DERIVED
|| flavor
== FL_NAMELIST
)
1896 gfc_error ("Symbol %qs at %L cannot have a type", sym
->name
, where
);
1905 /* Clears all attributes. */
1908 gfc_clear_attr (symbol_attribute
*attr
)
1910 memset (attr
, 0, sizeof (symbol_attribute
));
1914 /* Check for missing attributes in the new symbol. Currently does
1915 nothing, but it's not clear that it is unnecessary yet. */
1918 gfc_missing_attr (symbol_attribute
*attr ATTRIBUTE_UNUSED
,
1919 locus
*where ATTRIBUTE_UNUSED
)
1926 /* Copy an attribute to a symbol attribute, bit by bit. Some
1927 attributes have a lot of side-effects but cannot be present given
1928 where we are called from, so we ignore some bits. */
1931 gfc_copy_attr (symbol_attribute
*dest
, symbol_attribute
*src
, locus
*where
)
1933 int is_proc_lang_bind_spec
;
1935 /* In line with the other attributes, we only add bits but do not remove
1936 them; cf. also PR 41034. */
1937 dest
->ext_attr
|= src
->ext_attr
;
1939 if (src
->allocatable
&& !gfc_add_allocatable (dest
, where
))
1942 if (src
->automatic
&& !gfc_add_automatic (dest
, NULL
, where
))
1944 if (src
->dimension
&& !gfc_add_dimension (dest
, NULL
, where
))
1946 if (src
->codimension
&& !gfc_add_codimension (dest
, NULL
, where
))
1948 if (src
->contiguous
&& !gfc_add_contiguous (dest
, NULL
, where
))
1950 if (src
->optional
&& !gfc_add_optional (dest
, where
))
1952 if (src
->pointer
&& !gfc_add_pointer (dest
, where
))
1954 if (src
->is_protected
&& !gfc_add_protected (dest
, NULL
, where
))
1956 if (src
->save
&& !gfc_add_save (dest
, src
->save
, NULL
, where
))
1958 if (src
->value
&& !gfc_add_value (dest
, NULL
, where
))
1960 if (src
->volatile_
&& !gfc_add_volatile (dest
, NULL
, where
))
1962 if (src
->asynchronous
&& !gfc_add_asynchronous (dest
, NULL
, where
))
1964 if (src
->threadprivate
1965 && !gfc_add_threadprivate (dest
, NULL
, where
))
1967 if (src
->omp_declare_target
1968 && !gfc_add_omp_declare_target (dest
, NULL
, where
))
1970 if (src
->omp_declare_target_link
1971 && !gfc_add_omp_declare_target_link (dest
, NULL
, where
))
1973 if (src
->oacc_declare_create
1974 && !gfc_add_oacc_declare_create (dest
, NULL
, where
))
1976 if (src
->oacc_declare_copyin
1977 && !gfc_add_oacc_declare_copyin (dest
, NULL
, where
))
1979 if (src
->oacc_declare_deviceptr
1980 && !gfc_add_oacc_declare_deviceptr (dest
, NULL
, where
))
1982 if (src
->oacc_declare_device_resident
1983 && !gfc_add_oacc_declare_device_resident (dest
, NULL
, where
))
1985 if (src
->target
&& !gfc_add_target (dest
, where
))
1987 if (src
->dummy
&& !gfc_add_dummy (dest
, NULL
, where
))
1989 if (src
->result
&& !gfc_add_result (dest
, NULL
, where
))
1994 if (src
->in_namelist
&& !gfc_add_in_namelist (dest
, NULL
, where
))
1997 if (src
->in_common
&& !gfc_add_in_common (dest
, NULL
, where
))
2000 if (src
->generic
&& !gfc_add_generic (dest
, NULL
, where
))
2002 if (src
->function
&& !gfc_add_function (dest
, NULL
, where
))
2004 if (src
->subroutine
&& !gfc_add_subroutine (dest
, NULL
, where
))
2007 if (src
->sequence
&& !gfc_add_sequence (dest
, NULL
, where
))
2009 if (src
->elemental
&& !gfc_add_elemental (dest
, where
))
2011 if (src
->pure
&& !gfc_add_pure (dest
, where
))
2013 if (src
->recursive
&& !gfc_add_recursive (dest
, where
))
2016 if (src
->flavor
!= FL_UNKNOWN
2017 && !gfc_add_flavor (dest
, src
->flavor
, NULL
, where
))
2020 if (src
->intent
!= INTENT_UNKNOWN
2021 && !gfc_add_intent (dest
, src
->intent
, where
))
2024 if (src
->access
!= ACCESS_UNKNOWN
2025 && !gfc_add_access (dest
, src
->access
, NULL
, where
))
2028 if (!gfc_missing_attr (dest
, where
))
2031 if (src
->cray_pointer
&& !gfc_add_cray_pointer (dest
, where
))
2033 if (src
->cray_pointee
&& !gfc_add_cray_pointee (dest
, where
))
2036 is_proc_lang_bind_spec
= (src
->flavor
== FL_PROCEDURE
? 1 : 0);
2038 && !gfc_add_is_bind_c (dest
, NULL
, where
, is_proc_lang_bind_spec
))
2041 if (src
->is_c_interop
)
2042 dest
->is_c_interop
= 1;
2046 if (src
->external
&& !gfc_add_external (dest
, where
))
2048 if (src
->intrinsic
&& !gfc_add_intrinsic (dest
, where
))
2050 if (src
->proc_pointer
)
2051 dest
->proc_pointer
= 1;
2060 /* A function to generate a dummy argument symbol using that from the
2061 interface declaration. Can be used for the result symbol as well if
2065 gfc_copy_dummy_sym (gfc_symbol
**dsym
, gfc_symbol
*sym
, int result
)
2069 rc
= gfc_get_symbol (sym
->name
, NULL
, dsym
);
2073 if (!gfc_add_type (*dsym
, &(sym
->ts
), &gfc_current_locus
))
2076 if (!gfc_copy_attr (&(*dsym
)->attr
, &(sym
->attr
),
2077 &gfc_current_locus
))
2080 if ((*dsym
)->attr
.dimension
)
2081 (*dsym
)->as
= gfc_copy_array_spec (sym
->as
);
2083 (*dsym
)->attr
.class_ok
= sym
->attr
.class_ok
;
2085 if ((*dsym
) != NULL
&& !result
2086 && (!gfc_add_dummy(&(*dsym
)->attr
, (*dsym
)->name
, NULL
)
2087 || !gfc_missing_attr (&(*dsym
)->attr
, NULL
)))
2089 else if ((*dsym
) != NULL
&& result
2090 && (!gfc_add_result(&(*dsym
)->attr
, (*dsym
)->name
, NULL
)
2091 || !gfc_missing_attr (&(*dsym
)->attr
, NULL
)))
2098 /************** Component name management ************/
2100 /* Component names of a derived type form their own little namespaces
2101 that are separate from all other spaces. The space is composed of
2102 a singly linked list of gfc_component structures whose head is
2103 located in the parent symbol. */
2106 /* Add a component name to a symbol. The call fails if the name is
2107 already present. On success, the component pointer is modified to
2108 point to the additional component structure. */
2111 gfc_add_component (gfc_symbol
*sym
, const char *name
,
2112 gfc_component
**component
)
2114 gfc_component
*p
, *tail
;
2116 /* Check for existing components with the same name, but not for union
2117 components or containers. Unions and maps are anonymous so they have
2118 unique internal names which will never conflict.
2119 Don't use gfc_find_component here because it calls gfc_use_derived,
2120 but the derived type may not be fully defined yet. */
2123 for (p
= sym
->components
; p
; p
= p
->next
)
2125 if (strcmp (p
->name
, name
) == 0)
2127 gfc_error ("Component %qs at %C already declared at %L",
2135 if (sym
->attr
.extension
2136 && gfc_find_component (sym
->components
->ts
.u
.derived
,
2137 name
, true, true, NULL
))
2139 gfc_error ("Component %qs at %C already in the parent type "
2140 "at %L", name
, &sym
->components
->ts
.u
.derived
->declared_at
);
2144 /* Allocate a new component. */
2145 p
= gfc_get_component ();
2148 sym
->components
= p
;
2152 p
->name
= gfc_get_string (name
);
2153 p
->loc
= gfc_current_locus
;
2154 p
->ts
.type
= BT_UNKNOWN
;
2161 /* Recursive function to switch derived types of all symbol in a
2165 switch_types (gfc_symtree
*st
, gfc_symbol
*from
, gfc_symbol
*to
)
2173 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
== from
)
2174 sym
->ts
.u
.derived
= to
;
2176 switch_types (st
->left
, from
, to
);
2177 switch_types (st
->right
, from
, to
);
2181 /* This subroutine is called when a derived type is used in order to
2182 make the final determination about which version to use. The
2183 standard requires that a type be defined before it is 'used', but
2184 such types can appear in IMPLICIT statements before the actual
2185 definition. 'Using' in this context means declaring a variable to
2186 be that type or using the type constructor.
2188 If a type is used and the components haven't been defined, then we
2189 have to have a derived type in a parent unit. We find the node in
2190 the other namespace and point the symtree node in this namespace to
2191 that node. Further reference to this name point to the correct
2192 node. If we can't find the node in a parent namespace, then we have
2195 This subroutine takes a pointer to a symbol node and returns a
2196 pointer to the translated node or NULL for an error. Usually there
2197 is no translation and we return the node we were passed. */
2200 gfc_use_derived (gfc_symbol
*sym
)
2210 if (sym
->attr
.unlimited_polymorphic
)
2213 if (sym
->attr
.generic
)
2214 sym
= gfc_find_dt_in_generic (sym
);
2216 if (sym
->components
!= NULL
|| sym
->attr
.zero_comp
)
2217 return sym
; /* Already defined. */
2219 if (sym
->ns
->parent
== NULL
)
2222 if (gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
))
2224 gfc_error ("Symbol %qs at %C is ambiguous", sym
->name
);
2228 if (s
== NULL
|| !gfc_fl_struct (s
->attr
.flavor
))
2231 /* Get rid of symbol sym, translating all references to s. */
2232 for (i
= 0; i
< GFC_LETTERS
; i
++)
2234 t
= &sym
->ns
->default_type
[i
];
2235 if (t
->u
.derived
== sym
)
2239 st
= gfc_find_symtree (sym
->ns
->sym_root
, sym
->name
);
2244 /* Unlink from list of modified symbols. */
2245 gfc_commit_symbol (sym
);
2247 switch_types (sym
->ns
->sym_root
, sym
, s
);
2249 /* TODO: Also have to replace sym -> s in other lists like
2250 namelists, common lists and interface lists. */
2251 gfc_free_symbol (sym
);
2256 gfc_error ("Derived type %qs at %C is being used before it is defined",
2262 /* Find the component with the given name in the union type symbol.
2263 If ref is not NULL it will be set to the chain of components through which
2264 the component can actually be accessed. This is necessary for unions because
2265 intermediate structures may be maps, nested structures, or other unions,
2266 all of which may (or must) be 'anonymous' to user code. */
2268 static gfc_component
*
2269 find_union_component (gfc_symbol
*un
, const char *name
,
2270 bool noaccess
, gfc_ref
**ref
)
2272 gfc_component
*m
, *check
;
2273 gfc_ref
*sref
, *tmp
;
2275 for (m
= un
->components
; m
; m
= m
->next
)
2277 check
= gfc_find_component (m
->ts
.u
.derived
, name
, noaccess
, true, &tmp
);
2281 /* Found component somewhere in m; chain the refs together. */
2285 sref
= gfc_get_ref ();
2286 sref
->type
= REF_COMPONENT
;
2287 sref
->u
.c
.component
= m
;
2288 sref
->u
.c
.sym
= m
->ts
.u
.derived
;
2293 /* Other checks (such as access) were done in the recursive calls. */
2300 /* Given a derived type node and a component name, try to locate the
2301 component structure. Returns the NULL pointer if the component is
2302 not found or the components are private. If noaccess is set, no access
2303 checks are done. If silent is set, an error will not be generated if
2304 the component cannot be found or accessed.
2306 If ref is not NULL, *ref is set to represent the chain of components
2307 required to get to the ultimate component.
2309 If the component is simply a direct subcomponent, or is inherited from a
2310 parent derived type in the given derived type, this is a single ref with its
2311 component set to the returned component.
2313 Otherwise, *ref is constructed as a chain of subcomponents. This occurs
2314 when the component is found through an implicit chain of nested union and
2315 map components. Unions and maps are "anonymous" substructures in FORTRAN
2316 which cannot be explicitly referenced, but the reference chain must be
2317 considered as in C for backend translation to correctly compute layouts.
2318 (For example, x.a may refer to x->(UNION)->(MAP)->(UNION)->(MAP)->a). */
2321 gfc_find_component (gfc_symbol
*sym
, const char *name
,
2322 bool noaccess
, bool silent
, gfc_ref
**ref
)
2324 gfc_component
*p
, *check
;
2325 gfc_ref
*sref
= NULL
, *tmp
= NULL
;
2327 if (name
== NULL
|| sym
== NULL
)
2330 if (sym
->attr
.flavor
== FL_DERIVED
)
2331 sym
= gfc_use_derived (sym
);
2333 gcc_assert (gfc_fl_struct (sym
->attr
.flavor
));
2338 /* Handle UNIONs specially - mutually recursive with gfc_find_component. */
2339 if (sym
->attr
.flavor
== FL_UNION
)
2340 return find_union_component (sym
, name
, noaccess
, ref
);
2342 if (ref
) *ref
= NULL
;
2343 for (p
= sym
->components
; p
; p
= p
->next
)
2345 /* Nest search into union's maps. */
2346 if (p
->ts
.type
== BT_UNION
)
2348 check
= find_union_component (p
->ts
.u
.derived
, name
, noaccess
, &tmp
);
2354 sref
= gfc_get_ref ();
2355 sref
->type
= REF_COMPONENT
;
2356 sref
->u
.c
.component
= p
;
2357 sref
->u
.c
.sym
= p
->ts
.u
.derived
;
2364 else if (strcmp (p
->name
, name
) == 0)
2370 if (p
&& sym
->attr
.use_assoc
&& !noaccess
)
2372 bool is_parent_comp
= sym
->attr
.extension
&& (p
== sym
->components
);
2373 if (p
->attr
.access
== ACCESS_PRIVATE
||
2374 (p
->attr
.access
!= ACCESS_PUBLIC
2375 && sym
->component_access
== ACCESS_PRIVATE
2376 && !is_parent_comp
))
2379 gfc_error ("Component %qs at %C is a PRIVATE component of %qs",
2386 && sym
->attr
.extension
2387 && sym
->components
->ts
.type
== BT_DERIVED
)
2389 p
= gfc_find_component (sym
->components
->ts
.u
.derived
, name
,
2390 noaccess
, silent
, ref
);
2391 /* Do not overwrite the error. */
2396 if (p
== NULL
&& !silent
)
2397 gfc_error ("%qs at %C is not a member of the %qs structure",
2400 /* Component was found; build the ultimate component reference. */
2401 if (p
!= NULL
&& ref
)
2403 tmp
= gfc_get_ref ();
2404 tmp
->type
= REF_COMPONENT
;
2405 tmp
->u
.c
.component
= p
;
2407 /* Link the final component ref to the end of the chain of subrefs. */
2411 for (; sref
->next
; sref
= sref
->next
)
2423 /* Given a symbol, free all of the component structures and everything
2427 free_components (gfc_component
*p
)
2435 gfc_free_array_spec (p
->as
);
2436 gfc_free_expr (p
->initializer
);
2444 /******************** Statement label management ********************/
2446 /* Comparison function for statement labels, used for managing the
2450 compare_st_labels (void *a1
, void *b1
)
2452 int a
= ((gfc_st_label
*) a1
)->value
;
2453 int b
= ((gfc_st_label
*) b1
)->value
;
2459 /* Free a single gfc_st_label structure, making sure the tree is not
2460 messed up. This function is called only when some parse error
2464 gfc_free_st_label (gfc_st_label
*label
)
2470 gfc_delete_bbt (&label
->ns
->st_labels
, label
, compare_st_labels
);
2472 if (label
->format
!= NULL
)
2473 gfc_free_expr (label
->format
);
2479 /* Free a whole tree of gfc_st_label structures. */
2482 free_st_labels (gfc_st_label
*label
)
2488 free_st_labels (label
->left
);
2489 free_st_labels (label
->right
);
2491 if (label
->format
!= NULL
)
2492 gfc_free_expr (label
->format
);
2497 /* Given a label number, search for and return a pointer to the label
2498 structure, creating it if it does not exist. */
2501 gfc_get_st_label (int labelno
)
2506 if (gfc_current_state () == COMP_DERIVED
)
2507 ns
= gfc_current_block ()->f2k_derived
;
2510 /* Find the namespace of the scoping unit:
2511 If we're in a BLOCK construct, jump to the parent namespace. */
2512 ns
= gfc_current_ns
;
2513 while (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
)
2517 /* First see if the label is already in this namespace. */
2521 if (lp
->value
== labelno
)
2524 if (lp
->value
< labelno
)
2530 lp
= XCNEW (gfc_st_label
);
2532 lp
->value
= labelno
;
2533 lp
->defined
= ST_LABEL_UNKNOWN
;
2534 lp
->referenced
= ST_LABEL_UNKNOWN
;
2537 gfc_insert_bbt (&ns
->st_labels
, lp
, compare_st_labels
);
2543 /* Called when a statement with a statement label is about to be
2544 accepted. We add the label to the list of the current namespace,
2545 making sure it hasn't been defined previously and referenced
2549 gfc_define_st_label (gfc_st_label
*lp
, gfc_sl_type type
, locus
*label_locus
)
2553 labelno
= lp
->value
;
2555 if (lp
->defined
!= ST_LABEL_UNKNOWN
)
2556 gfc_error ("Duplicate statement label %d at %L and %L", labelno
,
2557 &lp
->where
, label_locus
);
2560 lp
->where
= *label_locus
;
2564 case ST_LABEL_FORMAT
:
2565 if (lp
->referenced
== ST_LABEL_TARGET
2566 || lp
->referenced
== ST_LABEL_DO_TARGET
)
2567 gfc_error ("Label %d at %C already referenced as branch target",
2570 lp
->defined
= ST_LABEL_FORMAT
;
2574 case ST_LABEL_TARGET
:
2575 case ST_LABEL_DO_TARGET
:
2576 if (lp
->referenced
== ST_LABEL_FORMAT
)
2577 gfc_error ("Label %d at %C already referenced as a format label",
2582 if (lp
->referenced
== ST_LABEL_DO_TARGET
&& type
!= ST_LABEL_DO_TARGET
2583 && !gfc_notify_std (GFC_STD_F95_OBS
, "DO termination statement "
2584 "which is not END DO or CONTINUE with "
2585 "label %d at %C", labelno
))
2590 lp
->defined
= ST_LABEL_BAD_TARGET
;
2591 lp
->referenced
= ST_LABEL_BAD_TARGET
;
2597 /* Reference a label. Given a label and its type, see if that
2598 reference is consistent with what is known about that label,
2599 updating the unknown state. Returns false if something goes
2603 gfc_reference_st_label (gfc_st_label
*lp
, gfc_sl_type type
)
2605 gfc_sl_type label_type
;
2612 labelno
= lp
->value
;
2614 if (lp
->defined
!= ST_LABEL_UNKNOWN
)
2615 label_type
= lp
->defined
;
2618 label_type
= lp
->referenced
;
2619 lp
->where
= gfc_current_locus
;
2622 if (label_type
== ST_LABEL_FORMAT
2623 && (type
== ST_LABEL_TARGET
|| type
== ST_LABEL_DO_TARGET
))
2625 gfc_error ("Label %d at %C previously used as a FORMAT label", labelno
);
2630 if ((label_type
== ST_LABEL_TARGET
|| label_type
== ST_LABEL_DO_TARGET
2631 || label_type
== ST_LABEL_BAD_TARGET
)
2632 && type
== ST_LABEL_FORMAT
)
2634 gfc_error ("Label %d at %C previously used as branch target", labelno
);
2639 if (lp
->referenced
== ST_LABEL_DO_TARGET
&& type
== ST_LABEL_DO_TARGET
2640 && !gfc_notify_std (GFC_STD_F95_OBS
, "Shared DO termination label %d "
2644 if (lp
->referenced
!= ST_LABEL_DO_TARGET
)
2645 lp
->referenced
= type
;
2653 /************** Symbol table management subroutines ****************/
2655 /* Basic details: Fortran 95 requires a potentially unlimited number
2656 of distinct namespaces when compiling a program unit. This case
2657 occurs during a compilation of internal subprograms because all of
2658 the internal subprograms must be read before we can start
2659 generating code for the host.
2661 Given the tricky nature of the Fortran grammar, we must be able to
2662 undo changes made to a symbol table if the current interpretation
2663 of a statement is found to be incorrect. Whenever a symbol is
2664 looked up, we make a copy of it and link to it. All of these
2665 symbols are kept in a vector so that we can commit or
2666 undo the changes at a later time.
2668 A symtree may point to a symbol node outside of its namespace. In
2669 this case, that symbol has been used as a host associated variable
2670 at some previous time. */
2672 /* Allocate a new namespace structure. Copies the implicit types from
2673 PARENT if PARENT_TYPES is set. */
2676 gfc_get_namespace (gfc_namespace
*parent
, int parent_types
)
2683 ns
= XCNEW (gfc_namespace
);
2684 ns
->sym_root
= NULL
;
2685 ns
->uop_root
= NULL
;
2686 ns
->tb_sym_root
= NULL
;
2687 ns
->finalizers
= NULL
;
2688 ns
->default_access
= ACCESS_UNKNOWN
;
2689 ns
->parent
= parent
;
2691 for (in
= GFC_INTRINSIC_BEGIN
; in
!= GFC_INTRINSIC_END
; in
++)
2693 ns
->operator_access
[in
] = ACCESS_UNKNOWN
;
2694 ns
->tb_op
[in
] = NULL
;
2697 /* Initialize default implicit types. */
2698 for (i
= 'a'; i
<= 'z'; i
++)
2700 ns
->set_flag
[i
- 'a'] = 0;
2701 ts
= &ns
->default_type
[i
- 'a'];
2703 if (parent_types
&& ns
->parent
!= NULL
)
2705 /* Copy parent settings. */
2706 *ts
= ns
->parent
->default_type
[i
- 'a'];
2710 if (flag_implicit_none
!= 0)
2716 if ('i' <= i
&& i
<= 'n')
2718 ts
->type
= BT_INTEGER
;
2719 ts
->kind
= gfc_default_integer_kind
;
2724 ts
->kind
= gfc_default_real_kind
;
2728 if (parent_types
&& ns
->parent
!= NULL
)
2729 ns
->has_implicit_none_export
= ns
->parent
->has_implicit_none_export
;
2737 /* Comparison function for symtree nodes. */
2740 compare_symtree (void *_st1
, void *_st2
)
2742 gfc_symtree
*st1
, *st2
;
2744 st1
= (gfc_symtree
*) _st1
;
2745 st2
= (gfc_symtree
*) _st2
;
2747 return strcmp (st1
->name
, st2
->name
);
2751 /* Allocate a new symtree node and associate it with the new symbol. */
2754 gfc_new_symtree (gfc_symtree
**root
, const char *name
)
2758 st
= XCNEW (gfc_symtree
);
2759 st
->name
= gfc_get_string (name
);
2761 gfc_insert_bbt (root
, st
, compare_symtree
);
2766 /* Delete a symbol from the tree. Does not free the symbol itself! */
2769 gfc_delete_symtree (gfc_symtree
**root
, const char *name
)
2771 gfc_symtree st
, *st0
;
2773 st0
= gfc_find_symtree (*root
, name
);
2775 st
.name
= gfc_get_string (name
);
2776 gfc_delete_bbt (root
, &st
, compare_symtree
);
2782 /* Given a root symtree node and a name, try to find the symbol within
2783 the namespace. Returns NULL if the symbol is not found. */
2786 gfc_find_symtree (gfc_symtree
*st
, const char *name
)
2792 c
= strcmp (name
, st
->name
);
2796 st
= (c
< 0) ? st
->left
: st
->right
;
2803 /* Return a symtree node with a name that is guaranteed to be unique
2804 within the namespace and corresponds to an illegal fortran name. */
2807 gfc_get_unique_symtree (gfc_namespace
*ns
)
2809 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2810 static int serial
= 0;
2812 sprintf (name
, "@%d", serial
++);
2813 return gfc_new_symtree (&ns
->sym_root
, name
);
2817 /* Given a name find a user operator node, creating it if it doesn't
2818 exist. These are much simpler than symbols because they can't be
2819 ambiguous with one another. */
2822 gfc_get_uop (const char *name
)
2826 gfc_namespace
*ns
= gfc_current_ns
;
2830 st
= gfc_find_symtree (ns
->uop_root
, name
);
2834 st
= gfc_new_symtree (&ns
->uop_root
, name
);
2836 uop
= st
->n
.uop
= XCNEW (gfc_user_op
);
2837 uop
->name
= gfc_get_string (name
);
2838 uop
->access
= ACCESS_UNKNOWN
;
2845 /* Given a name find the user operator node. Returns NULL if it does
2849 gfc_find_uop (const char *name
, gfc_namespace
*ns
)
2854 ns
= gfc_current_ns
;
2856 st
= gfc_find_symtree (ns
->uop_root
, name
);
2857 return (st
== NULL
) ? NULL
: st
->n
.uop
;
2861 /* Update a symbol's common_block field, and take care of the associated
2862 memory management. */
2865 set_symbol_common_block (gfc_symbol
*sym
, gfc_common_head
*common_block
)
2867 if (sym
->common_block
== common_block
)
2870 if (sym
->common_block
&& sym
->common_block
->name
[0] != '\0')
2872 sym
->common_block
->refs
--;
2873 if (sym
->common_block
->refs
== 0)
2874 free (sym
->common_block
);
2876 sym
->common_block
= common_block
;
2880 /* Remove a gfc_symbol structure and everything it points to. */
2883 gfc_free_symbol (gfc_symbol
*sym
)
2889 gfc_free_array_spec (sym
->as
);
2891 free_components (sym
->components
);
2893 gfc_free_expr (sym
->value
);
2895 gfc_free_namelist (sym
->namelist
);
2897 if (sym
->ns
!= sym
->formal_ns
)
2898 gfc_free_namespace (sym
->formal_ns
);
2900 if (!sym
->attr
.generic_copy
)
2901 gfc_free_interface (sym
->generic
);
2903 gfc_free_formal_arglist (sym
->formal
);
2905 gfc_free_namespace (sym
->f2k_derived
);
2907 set_symbol_common_block (sym
, NULL
);
2913 /* Decrease the reference counter and free memory when we reach zero. */
2916 gfc_release_symbol (gfc_symbol
*sym
)
2921 if (sym
->formal_ns
!= NULL
&& sym
->refs
== 2 && sym
->formal_ns
!= sym
->ns
2922 && (!sym
->attr
.entry
|| !sym
->module
))
2924 /* As formal_ns contains a reference to sym, delete formal_ns just
2925 before the deletion of sym. */
2926 gfc_namespace
*ns
= sym
->formal_ns
;
2927 sym
->formal_ns
= NULL
;
2928 gfc_free_namespace (ns
);
2935 gcc_assert (sym
->refs
== 0);
2936 gfc_free_symbol (sym
);
2940 /* Allocate and initialize a new symbol node. */
2943 gfc_new_symbol (const char *name
, gfc_namespace
*ns
)
2947 p
= XCNEW (gfc_symbol
);
2949 gfc_clear_ts (&p
->ts
);
2950 gfc_clear_attr (&p
->attr
);
2953 p
->declared_at
= gfc_current_locus
;
2955 if (strlen (name
) > GFC_MAX_SYMBOL_LEN
)
2956 gfc_internal_error ("new_symbol(): Symbol name too long");
2958 p
->name
= gfc_get_string (name
);
2960 /* Make sure flags for symbol being C bound are clear initially. */
2961 p
->attr
.is_bind_c
= 0;
2962 p
->attr
.is_iso_c
= 0;
2964 /* Clear the ptrs we may need. */
2965 p
->common_block
= NULL
;
2966 p
->f2k_derived
= NULL
;
2973 /* Generate an error if a symbol is ambiguous. */
2976 ambiguous_symbol (const char *name
, gfc_symtree
*st
)
2979 if (st
->n
.sym
->module
)
2980 gfc_error ("Name %qs at %C is an ambiguous reference to %qs "
2981 "from module %qs", name
, st
->n
.sym
->name
, st
->n
.sym
->module
);
2983 gfc_error ("Name %qs at %C is an ambiguous reference to %qs "
2984 "from current program unit", name
, st
->n
.sym
->name
);
2988 /* If we're in a SELECT TYPE block, check if the variable 'st' matches any
2989 selector on the stack. If yes, replace it by the corresponding temporary. */
2992 select_type_insert_tmp (gfc_symtree
**st
)
2994 gfc_select_type_stack
*stack
= select_type_stack
;
2995 for (; stack
; stack
= stack
->prev
)
2996 if ((*st
)->n
.sym
== stack
->selector
&& stack
->tmp
)
2999 select_type_insert_tmp (st
);
3005 /* Look for a symtree in the current procedure -- that is, go up to
3006 parent namespaces but only if inside a BLOCK. Returns NULL if not found. */
3009 gfc_find_symtree_in_proc (const char* name
, gfc_namespace
* ns
)
3013 gfc_symtree
* st
= gfc_find_symtree (ns
->sym_root
, name
);
3017 if (!ns
->construct_entities
)
3026 /* Search for a symtree starting in the current namespace, resorting to
3027 any parent namespaces if requested by a nonzero parent_flag.
3028 Returns nonzero if the name is ambiguous. */
3031 gfc_find_sym_tree (const char *name
, gfc_namespace
*ns
, int parent_flag
,
3032 gfc_symtree
**result
)
3037 ns
= gfc_current_ns
;
3041 st
= gfc_find_symtree (ns
->sym_root
, name
);
3044 select_type_insert_tmp (&st
);
3047 /* Ambiguous generic interfaces are permitted, as long
3048 as the specific interfaces are different. */
3049 if (st
->ambiguous
&& !st
->n
.sym
->attr
.generic
)
3051 ambiguous_symbol (name
, st
);
3061 /* Don't escape an interface block. */
3062 if (ns
&& !ns
->has_import_set
3063 && ns
->proc_name
&& ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
3075 /* Same, but returns the symbol instead. */
3078 gfc_find_symbol (const char *name
, gfc_namespace
*ns
, int parent_flag
,
3079 gfc_symbol
**result
)
3084 i
= gfc_find_sym_tree (name
, ns
, parent_flag
, &st
);
3089 *result
= st
->n
.sym
;
3095 /* Tells whether there is only one set of changes in the stack. */
3098 single_undo_checkpoint_p (void)
3100 if (latest_undo_chgset
== &default_undo_chgset_var
)
3102 gcc_assert (latest_undo_chgset
->previous
== NULL
);
3107 gcc_assert (latest_undo_chgset
->previous
!= NULL
);
3112 /* Save symbol with the information necessary to back it out. */
3115 gfc_save_symbol_data (gfc_symbol
*sym
)
3120 if (!single_undo_checkpoint_p ())
3122 /* If there is more than one change set, look for the symbol in the
3123 current one. If it is found there, we can reuse it. */
3124 FOR_EACH_VEC_ELT (latest_undo_chgset
->syms
, i
, s
)
3127 gcc_assert (sym
->gfc_new
|| sym
->old_symbol
!= NULL
);
3131 else if (sym
->gfc_new
|| sym
->old_symbol
!= NULL
)
3134 s
= XCNEW (gfc_symbol
);
3136 sym
->old_symbol
= s
;
3139 latest_undo_chgset
->syms
.safe_push (sym
);
3143 /* Given a name, find a symbol, or create it if it does not exist yet
3144 in the current namespace. If the symbol is found we make sure that
3147 The integer return code indicates
3149 1 The symbol name was ambiguous
3150 2 The name meant to be established was already host associated.
3152 So if the return value is nonzero, then an error was issued. */
3155 gfc_get_sym_tree (const char *name
, gfc_namespace
*ns
, gfc_symtree
**result
,
3156 bool allow_subroutine
)
3161 /* This doesn't usually happen during resolution. */
3163 ns
= gfc_current_ns
;
3165 /* Try to find the symbol in ns. */
3166 st
= gfc_find_symtree (ns
->sym_root
, name
);
3168 if (st
== NULL
&& ns
->omp_udr_ns
)
3171 st
= gfc_find_symtree (ns
->sym_root
, name
);
3176 /* If not there, create a new symbol. */
3177 p
= gfc_new_symbol (name
, ns
);
3179 /* Add to the list of tentative symbols. */
3180 p
->old_symbol
= NULL
;
3183 latest_undo_chgset
->syms
.safe_push (p
);
3185 st
= gfc_new_symtree (&ns
->sym_root
, name
);
3192 /* Make sure the existing symbol is OK. Ambiguous
3193 generic interfaces are permitted, as long as the
3194 specific interfaces are different. */
3195 if (st
->ambiguous
&& !st
->n
.sym
->attr
.generic
)
3197 ambiguous_symbol (name
, st
);
3202 if (p
->ns
!= ns
&& (!p
->attr
.function
|| ns
->proc_name
!= p
)
3203 && !(allow_subroutine
&& p
->attr
.subroutine
)
3204 && !(ns
->proc_name
&& ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
3205 && (ns
->has_import_set
|| p
->attr
.imported
)))
3207 /* Symbol is from another namespace. */
3208 gfc_error ("Symbol %qs at %C has already been host associated",
3215 /* Copy in case this symbol is changed. */
3216 gfc_save_symbol_data (p
);
3225 gfc_get_symbol (const char *name
, gfc_namespace
*ns
, gfc_symbol
**result
)
3230 i
= gfc_get_sym_tree (name
, ns
, &st
, false);
3235 *result
= st
->n
.sym
;
3242 /* Subroutine that searches for a symbol, creating it if it doesn't
3243 exist, but tries to host-associate the symbol if possible. */
3246 gfc_get_ha_sym_tree (const char *name
, gfc_symtree
**result
)
3251 i
= gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
3255 gfc_save_symbol_data (st
->n
.sym
);
3260 i
= gfc_find_sym_tree (name
, gfc_current_ns
, 1, &st
);
3270 return gfc_get_sym_tree (name
, gfc_current_ns
, result
, false);
3275 gfc_get_ha_symbol (const char *name
, gfc_symbol
**result
)
3280 i
= gfc_get_ha_sym_tree (name
, &st
);
3283 *result
= st
->n
.sym
;
3291 /* Search for the symtree belonging to a gfc_common_head; we cannot use
3292 head->name as the common_root symtree's name might be mangled. */
3294 static gfc_symtree
*
3295 find_common_symtree (gfc_symtree
*st
, gfc_common_head
*head
)
3298 gfc_symtree
*result
;
3303 if (st
->n
.common
== head
)
3306 result
= find_common_symtree (st
->left
, head
);
3308 result
= find_common_symtree (st
->right
, head
);
3314 /* Clear the given storage, and make it the current change set for registering
3315 changed symbols. Its contents are freed after a call to
3316 gfc_restore_last_undo_checkpoint or gfc_drop_last_undo_checkpoint, but
3317 it is up to the caller to free the storage itself. It is usually a local
3318 variable, so there is nothing to do anyway. */
3321 gfc_new_undo_checkpoint (gfc_undo_change_set
&chg_syms
)
3323 chg_syms
.syms
= vNULL
;
3324 chg_syms
.tbps
= vNULL
;
3325 chg_syms
.previous
= latest_undo_chgset
;
3326 latest_undo_chgset
= &chg_syms
;
3330 /* Restore previous state of symbol. Just copy simple stuff. */
3333 restore_old_symbol (gfc_symbol
*p
)
3338 old
= p
->old_symbol
;
3340 p
->ts
.type
= old
->ts
.type
;
3341 p
->ts
.kind
= old
->ts
.kind
;
3343 p
->attr
= old
->attr
;
3345 if (p
->value
!= old
->value
)
3347 gcc_checking_assert (old
->value
== NULL
);
3348 gfc_free_expr (p
->value
);
3352 if (p
->as
!= old
->as
)
3355 gfc_free_array_spec (p
->as
);
3359 p
->generic
= old
->generic
;
3360 p
->component_access
= old
->component_access
;
3362 if (p
->namelist
!= NULL
&& old
->namelist
== NULL
)
3364 gfc_free_namelist (p
->namelist
);
3369 if (p
->namelist_tail
!= old
->namelist_tail
)
3371 gfc_free_namelist (old
->namelist_tail
->next
);
3372 old
->namelist_tail
->next
= NULL
;
3376 p
->namelist_tail
= old
->namelist_tail
;
3378 if (p
->formal
!= old
->formal
)
3380 gfc_free_formal_arglist (p
->formal
);
3381 p
->formal
= old
->formal
;
3384 set_symbol_common_block (p
, old
->common_block
);
3385 p
->common_head
= old
->common_head
;
3387 p
->old_symbol
= old
->old_symbol
;
3392 /* Frees the internal data of a gfc_undo_change_set structure. Doesn't free
3393 the structure itself. */
3396 free_undo_change_set_data (gfc_undo_change_set
&cs
)
3403 /* Given a change set pointer, free its target's contents and update it with
3404 the address of the previous change set. Note that only the contents are
3405 freed, not the target itself (the contents' container). It is not a problem
3406 as the latter will be a local variable usually. */
3409 pop_undo_change_set (gfc_undo_change_set
*&cs
)
3411 free_undo_change_set_data (*cs
);
3416 static void free_old_symbol (gfc_symbol
*sym
);
3419 /* Merges the current change set into the previous one. The changes themselves
3420 are left untouched; only one checkpoint is forgotten. */
3423 gfc_drop_last_undo_checkpoint (void)
3428 FOR_EACH_VEC_ELT (latest_undo_chgset
->syms
, i
, s
)
3430 /* No need to loop in this case. */
3431 if (s
->old_symbol
== NULL
)
3434 /* Remove the duplicate symbols. */
3435 FOR_EACH_VEC_ELT (latest_undo_chgset
->previous
->syms
, j
, t
)
3438 latest_undo_chgset
->previous
->syms
.unordered_remove (j
);
3440 /* S->OLD_SYMBOL is the backup symbol for S as it was at the
3441 last checkpoint. We drop that checkpoint, so S->OLD_SYMBOL
3442 shall contain from now on the backup symbol for S as it was
3443 at the checkpoint before. */
3444 if (s
->old_symbol
->gfc_new
)
3446 gcc_assert (s
->old_symbol
->old_symbol
== NULL
);
3447 s
->gfc_new
= s
->old_symbol
->gfc_new
;
3448 free_old_symbol (s
);
3451 restore_old_symbol (s
->old_symbol
);
3456 latest_undo_chgset
->previous
->syms
.safe_splice (latest_undo_chgset
->syms
);
3457 latest_undo_chgset
->previous
->tbps
.safe_splice (latest_undo_chgset
->tbps
);
3459 pop_undo_change_set (latest_undo_chgset
);
3463 /* Undoes all the changes made to symbols since the previous checkpoint.
3464 This subroutine is made simpler due to the fact that attributes are
3465 never removed once added. */
3468 gfc_restore_last_undo_checkpoint (void)
3473 FOR_EACH_VEC_ELT (latest_undo_chgset
->syms
, i
, p
)
3475 /* Symbol in a common block was new. Or was old and just put in common */
3477 && (p
->gfc_new
|| !p
->old_symbol
->common_block
))
3479 /* If the symbol was added to any common block, it
3480 needs to be removed to stop the resolver looking
3481 for a (possibly) dead symbol. */
3482 if (p
->common_block
->head
== p
&& !p
->common_next
)
3484 gfc_symtree st
, *st0
;
3485 st0
= find_common_symtree (p
->ns
->common_root
,
3489 st
.name
= st0
->name
;
3490 gfc_delete_bbt (&p
->ns
->common_root
, &st
, compare_symtree
);
3495 if (p
->common_block
->head
== p
)
3496 p
->common_block
->head
= p
->common_next
;
3499 gfc_symbol
*cparent
, *csym
;
3501 cparent
= p
->common_block
->head
;
3502 csym
= cparent
->common_next
;
3507 csym
= csym
->common_next
;
3510 gcc_assert(cparent
->common_next
== p
);
3511 cparent
->common_next
= csym
->common_next
;
3513 p
->common_next
= NULL
;
3517 /* The derived type is saved in the symtree with the first
3518 letter capitalized; the all lower-case version to the
3519 derived type contains its associated generic function. */
3520 if (gfc_fl_struct (p
->attr
.flavor
))
3521 gfc_delete_symtree (&p
->ns
->sym_root
,gfc_dt_upper_string (p
->name
));
3523 gfc_delete_symtree (&p
->ns
->sym_root
, p
->name
);
3525 gfc_release_symbol (p
);
3528 restore_old_symbol (p
);
3531 latest_undo_chgset
->syms
.truncate (0);
3532 latest_undo_chgset
->tbps
.truncate (0);
3534 if (!single_undo_checkpoint_p ())
3535 pop_undo_change_set (latest_undo_chgset
);
3539 /* Makes sure that there is only one set of changes; in other words we haven't
3540 forgotten to pair a call to gfc_new_checkpoint with a call to either
3541 gfc_drop_last_undo_checkpoint or gfc_restore_last_undo_checkpoint. */
3544 enforce_single_undo_checkpoint (void)
3546 gcc_checking_assert (single_undo_checkpoint_p ());
3550 /* Undoes all the changes made to symbols in the current statement. */
3553 gfc_undo_symbols (void)
3555 enforce_single_undo_checkpoint ();
3556 gfc_restore_last_undo_checkpoint ();
3560 /* Free sym->old_symbol. sym->old_symbol is mostly a shallow copy of sym; the
3561 components of old_symbol that might need deallocation are the "allocatables"
3562 that are restored in gfc_undo_symbols(), with two exceptions: namelist and
3563 namelist_tail. In case these differ between old_symbol and sym, it's just
3564 because sym->namelist has gotten a few more items. */
3567 free_old_symbol (gfc_symbol
*sym
)
3570 if (sym
->old_symbol
== NULL
)
3573 if (sym
->old_symbol
->as
!= sym
->as
)
3574 gfc_free_array_spec (sym
->old_symbol
->as
);
3576 if (sym
->old_symbol
->value
!= sym
->value
)
3577 gfc_free_expr (sym
->old_symbol
->value
);
3579 if (sym
->old_symbol
->formal
!= sym
->formal
)
3580 gfc_free_formal_arglist (sym
->old_symbol
->formal
);
3582 free (sym
->old_symbol
);
3583 sym
->old_symbol
= NULL
;
3587 /* Makes the changes made in the current statement permanent-- gets
3588 rid of undo information. */
3591 gfc_commit_symbols (void)
3594 gfc_typebound_proc
*tbp
;
3597 enforce_single_undo_checkpoint ();
3599 FOR_EACH_VEC_ELT (latest_undo_chgset
->syms
, i
, p
)
3603 free_old_symbol (p
);
3605 latest_undo_chgset
->syms
.truncate (0);
3607 FOR_EACH_VEC_ELT (latest_undo_chgset
->tbps
, i
, tbp
)
3609 latest_undo_chgset
->tbps
.truncate (0);
3613 /* Makes the changes made in one symbol permanent -- gets rid of undo
3617 gfc_commit_symbol (gfc_symbol
*sym
)
3622 enforce_single_undo_checkpoint ();
3624 FOR_EACH_VEC_ELT (latest_undo_chgset
->syms
, i
, p
)
3627 latest_undo_chgset
->syms
.unordered_remove (i
);
3634 free_old_symbol (sym
);
3638 /* Recursively free trees containing type-bound procedures. */
3641 free_tb_tree (gfc_symtree
*t
)
3646 free_tb_tree (t
->left
);
3647 free_tb_tree (t
->right
);
3649 /* TODO: Free type-bound procedure structs themselves; probably needs some
3650 sort of ref-counting mechanism. */
3656 /* Recursive function that deletes an entire tree and all the common
3657 head structures it points to. */
3660 free_common_tree (gfc_symtree
* common_tree
)
3662 if (common_tree
== NULL
)
3665 free_common_tree (common_tree
->left
);
3666 free_common_tree (common_tree
->right
);
3672 /* Recursive function that deletes an entire tree and all the common
3673 head structures it points to. */
3676 free_omp_udr_tree (gfc_symtree
* omp_udr_tree
)
3678 if (omp_udr_tree
== NULL
)
3681 free_omp_udr_tree (omp_udr_tree
->left
);
3682 free_omp_udr_tree (omp_udr_tree
->right
);
3684 gfc_free_omp_udr (omp_udr_tree
->n
.omp_udr
);
3685 free (omp_udr_tree
);
3689 /* Recursive function that deletes an entire tree and all the user
3690 operator nodes that it contains. */
3693 free_uop_tree (gfc_symtree
*uop_tree
)
3695 if (uop_tree
== NULL
)
3698 free_uop_tree (uop_tree
->left
);
3699 free_uop_tree (uop_tree
->right
);
3701 gfc_free_interface (uop_tree
->n
.uop
->op
);
3702 free (uop_tree
->n
.uop
);
3707 /* Recursive function that deletes an entire tree and all the symbols
3708 that it contains. */
3711 free_sym_tree (gfc_symtree
*sym_tree
)
3713 if (sym_tree
== NULL
)
3716 free_sym_tree (sym_tree
->left
);
3717 free_sym_tree (sym_tree
->right
);
3719 gfc_release_symbol (sym_tree
->n
.sym
);
3724 /* Free the derived type list. */
3727 gfc_free_dt_list (void)
3729 gfc_dt_list
*dt
, *n
;
3731 for (dt
= gfc_derived_types
; dt
; dt
= n
)
3737 gfc_derived_types
= NULL
;
3741 /* Free the gfc_equiv_info's. */
3744 gfc_free_equiv_infos (gfc_equiv_info
*s
)
3748 gfc_free_equiv_infos (s
->next
);
3753 /* Free the gfc_equiv_lists. */
3756 gfc_free_equiv_lists (gfc_equiv_list
*l
)
3760 gfc_free_equiv_lists (l
->next
);
3761 gfc_free_equiv_infos (l
->equiv
);
3766 /* Free a finalizer procedure list. */
3769 gfc_free_finalizer (gfc_finalizer
* el
)
3773 gfc_release_symbol (el
->proc_sym
);
3779 gfc_free_finalizer_list (gfc_finalizer
* list
)
3783 gfc_finalizer
* current
= list
;
3785 gfc_free_finalizer (current
);
3790 /* Create a new gfc_charlen structure and add it to a namespace.
3791 If 'old_cl' is given, the newly created charlen will be a copy of it. */
3794 gfc_new_charlen (gfc_namespace
*ns
, gfc_charlen
*old_cl
)
3798 cl
= gfc_get_charlen ();
3803 cl
->length
= gfc_copy_expr (old_cl
->length
);
3804 cl
->length_from_typespec
= old_cl
->length_from_typespec
;
3805 cl
->backend_decl
= old_cl
->backend_decl
;
3806 cl
->passed_length
= old_cl
->passed_length
;
3807 cl
->resolved
= old_cl
->resolved
;
3810 /* Put into namespace. */
3811 cl
->next
= ns
->cl_list
;
3818 /* Free the charlen list from cl to end (end is not freed).
3819 Free the whole list if end is NULL. */
3822 gfc_free_charlen (gfc_charlen
*cl
, gfc_charlen
*end
)
3826 for (; cl
!= end
; cl
= cl2
)
3831 gfc_free_expr (cl
->length
);
3837 /* Free entry list structs. */
3840 free_entry_list (gfc_entry_list
*el
)
3842 gfc_entry_list
*next
;
3849 free_entry_list (next
);
3853 /* Free a namespace structure and everything below it. Interface
3854 lists associated with intrinsic operators are not freed. These are
3855 taken care of when a specific name is freed. */
3858 gfc_free_namespace (gfc_namespace
*ns
)
3860 gfc_namespace
*p
, *q
;
3869 gcc_assert (ns
->refs
== 0);
3871 gfc_free_statements (ns
->code
);
3873 free_sym_tree (ns
->sym_root
);
3874 free_uop_tree (ns
->uop_root
);
3875 free_common_tree (ns
->common_root
);
3876 free_omp_udr_tree (ns
->omp_udr_root
);
3877 free_tb_tree (ns
->tb_sym_root
);
3878 free_tb_tree (ns
->tb_uop_root
);
3879 gfc_free_finalizer_list (ns
->finalizers
);
3880 gfc_free_omp_declare_simd_list (ns
->omp_declare_simd
);
3881 gfc_free_charlen (ns
->cl_list
, NULL
);
3882 free_st_labels (ns
->st_labels
);
3884 free_entry_list (ns
->entries
);
3885 gfc_free_equiv (ns
->equiv
);
3886 gfc_free_equiv_lists (ns
->equiv_lists
);
3887 gfc_free_use_stmts (ns
->use_stmts
);
3889 for (i
= GFC_INTRINSIC_BEGIN
; i
!= GFC_INTRINSIC_END
; i
++)
3890 gfc_free_interface (ns
->op
[i
]);
3892 gfc_free_data (ns
->data
);
3896 /* Recursively free any contained namespaces. */
3901 gfc_free_namespace (q
);
3907 gfc_symbol_init_2 (void)
3910 gfc_current_ns
= gfc_get_namespace (NULL
, 0);
3915 gfc_symbol_done_2 (void)
3917 gfc_free_namespace (gfc_current_ns
);
3918 gfc_current_ns
= NULL
;
3919 gfc_free_dt_list ();
3921 enforce_single_undo_checkpoint ();
3922 free_undo_change_set_data (*latest_undo_chgset
);
3926 /* Count how many nodes a symtree has. */
3929 count_st_nodes (const gfc_symtree
*st
)
3935 nodes
= count_st_nodes (st
->left
);
3937 nodes
+= count_st_nodes (st
->right
);
3943 /* Convert symtree tree into symtree vector. */
3946 fill_st_vector (gfc_symtree
*st
, gfc_symtree
**st_vec
, unsigned node_cntr
)
3951 node_cntr
= fill_st_vector (st
->left
, st_vec
, node_cntr
);
3952 st_vec
[node_cntr
++] = st
;
3953 node_cntr
= fill_st_vector (st
->right
, st_vec
, node_cntr
);
3959 /* Traverse namespace. As the functions might modify the symtree, we store the
3960 symtree as a vector and operate on this vector. Note: We assume that
3961 sym_func or st_func never deletes nodes from the symtree - only adding is
3962 allowed. Additionally, newly added nodes are not traversed. */
3965 do_traverse_symtree (gfc_symtree
*st
, void (*st_func
) (gfc_symtree
*),
3966 void (*sym_func
) (gfc_symbol
*))
3968 gfc_symtree
**st_vec
;
3969 unsigned nodes
, i
, node_cntr
;
3971 gcc_assert ((st_func
&& !sym_func
) || (!st_func
&& sym_func
));
3972 nodes
= count_st_nodes (st
);
3973 st_vec
= XALLOCAVEC (gfc_symtree
*, nodes
);
3975 fill_st_vector (st
, st_vec
, node_cntr
);
3980 for (i
= 0; i
< nodes
; i
++)
3981 st_vec
[i
]->n
.sym
->mark
= 0;
3982 for (i
= 0; i
< nodes
; i
++)
3983 if (!st_vec
[i
]->n
.sym
->mark
)
3985 (*sym_func
) (st_vec
[i
]->n
.sym
);
3986 st_vec
[i
]->n
.sym
->mark
= 1;
3990 for (i
= 0; i
< nodes
; i
++)
3991 (*st_func
) (st_vec
[i
]);
3995 /* Recursively traverse the symtree nodes. */
3998 gfc_traverse_symtree (gfc_symtree
*st
, void (*st_func
) (gfc_symtree
*))
4000 do_traverse_symtree (st
, st_func
, NULL
);
4004 /* Call a given function for all symbols in the namespace. We take
4005 care that each gfc_symbol node is called exactly once. */
4008 gfc_traverse_ns (gfc_namespace
*ns
, void (*sym_func
) (gfc_symbol
*))
4010 do_traverse_symtree (ns
->sym_root
, NULL
, sym_func
);
4014 /* Return TRUE when name is the name of an intrinsic type. */
4017 gfc_is_intrinsic_typename (const char *name
)
4019 if (strcmp (name
, "integer") == 0
4020 || strcmp (name
, "real") == 0
4021 || strcmp (name
, "character") == 0
4022 || strcmp (name
, "logical") == 0
4023 || strcmp (name
, "complex") == 0
4024 || strcmp (name
, "doubleprecision") == 0
4025 || strcmp (name
, "doublecomplex") == 0)
4032 /* Return TRUE if the symbol is an automatic variable. */
4035 gfc_is_var_automatic (gfc_symbol
*sym
)
4037 /* Pointer and allocatable variables are never automatic. */
4038 if (sym
->attr
.pointer
|| sym
->attr
.allocatable
)
4040 /* Check for arrays with non-constant size. */
4041 if (sym
->attr
.dimension
&& sym
->as
4042 && !gfc_is_compile_time_shape (sym
->as
))
4044 /* Check for non-constant length character variables. */
4045 if (sym
->ts
.type
== BT_CHARACTER
4047 && !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
))
4049 /* Variables with explicit AUTOMATIC attribute. */
4050 if (sym
->attr
.automatic
)
4056 /* Given a symbol, mark it as SAVEd if it is allowed. */
4059 save_symbol (gfc_symbol
*sym
)
4062 if (sym
->attr
.use_assoc
)
4065 if (sym
->attr
.in_common
4068 || sym
->attr
.flavor
!= FL_VARIABLE
)
4070 /* Automatic objects are not saved. */
4071 if (gfc_is_var_automatic (sym
))
4073 gfc_add_save (&sym
->attr
, SAVE_EXPLICIT
, sym
->name
, &sym
->declared_at
);
4077 /* Mark those symbols which can be SAVEd as such. */
4080 gfc_save_all (gfc_namespace
*ns
)
4082 gfc_traverse_ns (ns
, save_symbol
);
4086 /* Make sure that no changes to symbols are pending. */
4089 gfc_enforce_clean_symbol_state(void)
4091 enforce_single_undo_checkpoint ();
4092 gcc_assert (latest_undo_chgset
->syms
.is_empty ());
4096 /************** Global symbol handling ************/
4099 /* Search a tree for the global symbol. */
4102 gfc_find_gsymbol (gfc_gsymbol
*symbol
, const char *name
)
4111 c
= strcmp (name
, symbol
->name
);
4115 symbol
= (c
< 0) ? symbol
->left
: symbol
->right
;
4122 /* Compare two global symbols. Used for managing the BB tree. */
4125 gsym_compare (void *_s1
, void *_s2
)
4127 gfc_gsymbol
*s1
, *s2
;
4129 s1
= (gfc_gsymbol
*) _s1
;
4130 s2
= (gfc_gsymbol
*) _s2
;
4131 return strcmp (s1
->name
, s2
->name
);
4135 /* Get a global symbol, creating it if it doesn't exist. */
4138 gfc_get_gsymbol (const char *name
)
4142 s
= gfc_find_gsymbol (gfc_gsym_root
, name
);
4146 s
= XCNEW (gfc_gsymbol
);
4147 s
->type
= GSYM_UNKNOWN
;
4148 s
->name
= gfc_get_string (name
);
4150 gfc_insert_bbt (&gfc_gsym_root
, s
, gsym_compare
);
4157 get_iso_c_binding_dt (int sym_id
)
4159 gfc_dt_list
*dt_list
;
4161 dt_list
= gfc_derived_types
;
4163 /* Loop through the derived types in the name list, searching for
4164 the desired symbol from iso_c_binding. Search the parent namespaces
4165 if necessary and requested to (parent_flag). */
4166 while (dt_list
!= NULL
)
4168 if (dt_list
->derived
->from_intmod
!= INTMOD_NONE
4169 && dt_list
->derived
->intmod_sym_id
== sym_id
)
4170 return dt_list
->derived
;
4172 dt_list
= dt_list
->next
;
4179 /* Verifies that the given derived type symbol, derived_sym, is interoperable
4180 with C. This is necessary for any derived type that is BIND(C) and for
4181 derived types that are parameters to functions that are BIND(C). All
4182 fields of the derived type are required to be interoperable, and are tested
4183 for such. If an error occurs, the errors are reported here, allowing for
4184 multiple errors to be handled for a single derived type. */
4187 verify_bind_c_derived_type (gfc_symbol
*derived_sym
)
4189 gfc_component
*curr_comp
= NULL
;
4190 bool is_c_interop
= false;
4193 if (derived_sym
== NULL
)
4194 gfc_internal_error ("verify_bind_c_derived_type(): Given symbol is "
4195 "unexpectedly NULL");
4197 /* If we've already looked at this derived symbol, do not look at it again
4198 so we don't repeat warnings/errors. */
4199 if (derived_sym
->ts
.is_c_interop
)
4202 /* The derived type must have the BIND attribute to be interoperable
4203 J3/04-007, Section 15.2.3. */
4204 if (derived_sym
->attr
.is_bind_c
!= 1)
4206 derived_sym
->ts
.is_c_interop
= 0;
4207 gfc_error_now ("Derived type %qs declared at %L must have the BIND "
4208 "attribute to be C interoperable", derived_sym
->name
,
4209 &(derived_sym
->declared_at
));
4213 curr_comp
= derived_sym
->components
;
4215 /* Fortran 2003 allows an empty derived type. C99 appears to disallow an
4216 empty struct. Section 15.2 in Fortran 2003 states: "The following
4217 subclauses define the conditions under which a Fortran entity is
4218 interoperable. If a Fortran entity is interoperable, an equivalent
4219 entity may be defined by means of C and the Fortran entity is said
4220 to be interoperable with the C entity. There does not have to be such
4221 an interoperating C entity."
4223 if (curr_comp
== NULL
)
4225 gfc_warning (0, "Derived type %qs with BIND(C) attribute at %L is empty, "
4226 "and may be inaccessible by the C companion processor",
4227 derived_sym
->name
, &(derived_sym
->declared_at
));
4228 derived_sym
->ts
.is_c_interop
= 1;
4229 derived_sym
->attr
.is_bind_c
= 1;
4234 /* Initialize the derived type as being C interoperable.
4235 If we find an error in the components, this will be set false. */
4236 derived_sym
->ts
.is_c_interop
= 1;
4238 /* Loop through the list of components to verify that the kind of
4239 each is a C interoperable type. */
4242 /* The components cannot be pointers (fortran sense).
4243 J3/04-007, Section 15.2.3, C1505. */
4244 if (curr_comp
->attr
.pointer
!= 0)
4246 gfc_error ("Component %qs at %L cannot have the "
4247 "POINTER attribute because it is a member "
4248 "of the BIND(C) derived type %qs at %L",
4249 curr_comp
->name
, &(curr_comp
->loc
),
4250 derived_sym
->name
, &(derived_sym
->declared_at
));
4254 if (curr_comp
->attr
.proc_pointer
!= 0)
4256 gfc_error ("Procedure pointer component %qs at %L cannot be a member"
4257 " of the BIND(C) derived type %qs at %L", curr_comp
->name
,
4258 &curr_comp
->loc
, derived_sym
->name
,
4259 &derived_sym
->declared_at
);
4263 /* The components cannot be allocatable.
4264 J3/04-007, Section 15.2.3, C1505. */
4265 if (curr_comp
->attr
.allocatable
!= 0)
4267 gfc_error ("Component %qs at %L cannot have the "
4268 "ALLOCATABLE attribute because it is a member "
4269 "of the BIND(C) derived type %qs at %L",
4270 curr_comp
->name
, &(curr_comp
->loc
),
4271 derived_sym
->name
, &(derived_sym
->declared_at
));
4275 /* BIND(C) derived types must have interoperable components. */
4276 if (curr_comp
->ts
.type
== BT_DERIVED
4277 && curr_comp
->ts
.u
.derived
->ts
.is_iso_c
!= 1
4278 && curr_comp
->ts
.u
.derived
!= derived_sym
)
4280 /* This should be allowed; the draft says a derived-type can not
4281 have type parameters if it is has the BIND attribute. Type
4282 parameters seem to be for making parameterized derived types.
4283 There's no need to verify the type if it is c_ptr/c_funptr. */
4284 retval
= verify_bind_c_derived_type (curr_comp
->ts
.u
.derived
);
4288 /* Grab the typespec for the given component and test the kind. */
4289 is_c_interop
= gfc_verify_c_interop (&(curr_comp
->ts
));
4293 /* Report warning and continue since not fatal. The
4294 draft does specify a constraint that requires all fields
4295 to interoperate, but if the user says real(4), etc., it
4296 may interoperate with *something* in C, but the compiler
4297 most likely won't know exactly what. Further, it may not
4298 interoperate with the same data type(s) in C if the user
4299 recompiles with different flags (e.g., -m32 and -m64 on
4300 x86_64 and using integer(4) to claim interop with a
4302 if (derived_sym
->attr
.is_bind_c
== 1 && warn_c_binding_type
)
4303 /* If the derived type is bind(c), all fields must be
4305 gfc_warning (OPT_Wc_binding_type
,
4306 "Component %qs in derived type %qs at %L "
4307 "may not be C interoperable, even though "
4308 "derived type %qs is BIND(C)",
4309 curr_comp
->name
, derived_sym
->name
,
4310 &(curr_comp
->loc
), derived_sym
->name
);
4311 else if (warn_c_binding_type
)
4312 /* If derived type is param to bind(c) routine, or to one
4313 of the iso_c_binding procs, it must be interoperable, so
4314 all fields must interop too. */
4315 gfc_warning (OPT_Wc_binding_type
,
4316 "Component %qs in derived type %qs at %L "
4317 "may not be C interoperable",
4318 curr_comp
->name
, derived_sym
->name
,
4323 curr_comp
= curr_comp
->next
;
4324 } while (curr_comp
!= NULL
);
4327 /* Make sure we don't have conflicts with the attributes. */
4328 if (derived_sym
->attr
.access
== ACCESS_PRIVATE
)
4330 gfc_error ("Derived type %qs at %L cannot be declared with both "
4331 "PRIVATE and BIND(C) attributes", derived_sym
->name
,
4332 &(derived_sym
->declared_at
));
4336 if (derived_sym
->attr
.sequence
!= 0)
4338 gfc_error ("Derived type %qs at %L cannot have the SEQUENCE "
4339 "attribute because it is BIND(C)", derived_sym
->name
,
4340 &(derived_sym
->declared_at
));
4344 /* Mark the derived type as not being C interoperable if we found an
4345 error. If there were only warnings, proceed with the assumption
4346 it's interoperable. */
4348 derived_sym
->ts
.is_c_interop
= 0;
4354 /* Generate symbols for the named constants c_null_ptr and c_null_funptr. */
4357 gen_special_c_interop_ptr (gfc_symbol
*tmp_sym
, gfc_symtree
*dt_symtree
)
4361 gcc_assert (tmp_sym
&& dt_symtree
&& dt_symtree
->n
.sym
);
4362 dt_symtree
->n
.sym
->attr
.referenced
= 1;
4364 tmp_sym
->attr
.is_c_interop
= 1;
4365 tmp_sym
->attr
.is_bind_c
= 1;
4366 tmp_sym
->ts
.is_c_interop
= 1;
4367 tmp_sym
->ts
.is_iso_c
= 1;
4368 tmp_sym
->ts
.type
= BT_DERIVED
;
4369 tmp_sym
->ts
.f90_type
= BT_VOID
;
4370 tmp_sym
->attr
.flavor
= FL_PARAMETER
;
4371 tmp_sym
->ts
.u
.derived
= dt_symtree
->n
.sym
;
4373 /* Set the c_address field of c_null_ptr and c_null_funptr to
4374 the value of NULL. */
4375 tmp_sym
->value
= gfc_get_expr ();
4376 tmp_sym
->value
->expr_type
= EXPR_STRUCTURE
;
4377 tmp_sym
->value
->ts
.type
= BT_DERIVED
;
4378 tmp_sym
->value
->ts
.f90_type
= BT_VOID
;
4379 tmp_sym
->value
->ts
.u
.derived
= tmp_sym
->ts
.u
.derived
;
4380 gfc_constructor_append_expr (&tmp_sym
->value
->value
.constructor
, NULL
, NULL
);
4381 c
= gfc_constructor_first (tmp_sym
->value
->value
.constructor
);
4382 c
->expr
= gfc_get_int_expr (gfc_index_integer_kind
, NULL
, 0);
4383 c
->expr
->ts
.is_iso_c
= 1;
4389 /* Add a formal argument, gfc_formal_arglist, to the
4390 end of the given list of arguments. Set the reference to the
4391 provided symbol, param_sym, in the argument. */
4394 add_formal_arg (gfc_formal_arglist
**head
,
4395 gfc_formal_arglist
**tail
,
4396 gfc_formal_arglist
*formal_arg
,
4397 gfc_symbol
*param_sym
)
4399 /* Put in list, either as first arg or at the tail (curr arg). */
4401 *head
= *tail
= formal_arg
;
4404 (*tail
)->next
= formal_arg
;
4405 (*tail
) = formal_arg
;
4408 (*tail
)->sym
= param_sym
;
4409 (*tail
)->next
= NULL
;
4415 /* Add a procedure interface to the given symbol (i.e., store a
4416 reference to the list of formal arguments). */
4419 add_proc_interface (gfc_symbol
*sym
, ifsrc source
, gfc_formal_arglist
*formal
)
4422 sym
->formal
= formal
;
4423 sym
->attr
.if_source
= source
;
4427 /* Copy the formal args from an existing symbol, src, into a new
4428 symbol, dest. New formal args are created, and the description of
4429 each arg is set according to the existing ones. This function is
4430 used when creating procedure declaration variables from a procedure
4431 declaration statement (see match_proc_decl()) to create the formal
4432 args based on the args of a given named interface.
4434 When an actual argument list is provided, skip the absent arguments.
4435 To be used together with gfc_se->ignore_optional. */
4438 gfc_copy_formal_args_intr (gfc_symbol
*dest
, gfc_intrinsic_sym
*src
,
4439 gfc_actual_arglist
*actual
)
4441 gfc_formal_arglist
*head
= NULL
;
4442 gfc_formal_arglist
*tail
= NULL
;
4443 gfc_formal_arglist
*formal_arg
= NULL
;
4444 gfc_intrinsic_arg
*curr_arg
= NULL
;
4445 gfc_formal_arglist
*formal_prev
= NULL
;
4446 gfc_actual_arglist
*act_arg
= actual
;
4447 /* Save current namespace so we can change it for formal args. */
4448 gfc_namespace
*parent_ns
= gfc_current_ns
;
4450 /* Create a new namespace, which will be the formal ns (namespace
4451 of the formal args). */
4452 gfc_current_ns
= gfc_get_namespace (parent_ns
, 0);
4453 gfc_current_ns
->proc_name
= dest
;
4455 for (curr_arg
= src
->formal
; curr_arg
; curr_arg
= curr_arg
->next
)
4457 /* Skip absent arguments. */
4460 gcc_assert (act_arg
!= NULL
);
4461 if (act_arg
->expr
== NULL
)
4463 act_arg
= act_arg
->next
;
4466 act_arg
= act_arg
->next
;
4468 formal_arg
= gfc_get_formal_arglist ();
4469 gfc_get_symbol (curr_arg
->name
, gfc_current_ns
, &(formal_arg
->sym
));
4471 /* May need to copy more info for the symbol. */
4472 formal_arg
->sym
->ts
= curr_arg
->ts
;
4473 formal_arg
->sym
->attr
.optional
= curr_arg
->optional
;
4474 formal_arg
->sym
->attr
.value
= curr_arg
->value
;
4475 formal_arg
->sym
->attr
.intent
= curr_arg
->intent
;
4476 formal_arg
->sym
->attr
.flavor
= FL_VARIABLE
;
4477 formal_arg
->sym
->attr
.dummy
= 1;
4479 if (formal_arg
->sym
->ts
.type
== BT_CHARACTER
)
4480 formal_arg
->sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4482 /* If this isn't the first arg, set up the next ptr. For the
4483 last arg built, the formal_arg->next will never get set to
4484 anything other than NULL. */
4485 if (formal_prev
!= NULL
)
4486 formal_prev
->next
= formal_arg
;
4488 formal_arg
->next
= NULL
;
4490 formal_prev
= formal_arg
;
4492 /* Add arg to list of formal args. */
4493 add_formal_arg (&head
, &tail
, formal_arg
, formal_arg
->sym
);
4495 /* Validate changes. */
4496 gfc_commit_symbol (formal_arg
->sym
);
4499 /* Add the interface to the symbol. */
4500 add_proc_interface (dest
, IFSRC_DECL
, head
);
4502 /* Store the formal namespace information. */
4503 if (dest
->formal
!= NULL
)
4504 /* The current ns should be that for the dest proc. */
4505 dest
->formal_ns
= gfc_current_ns
;
4506 /* Restore the current namespace to what it was on entry. */
4507 gfc_current_ns
= parent_ns
;
4512 std_for_isocbinding_symbol (int id
)
4516 #define NAMED_INTCST(a,b,c,d) \
4519 #include "iso-c-binding.def"
4522 #define NAMED_FUNCTION(a,b,c,d) \
4525 #define NAMED_SUBROUTINE(a,b,c,d) \
4528 #include "iso-c-binding.def"
4529 #undef NAMED_FUNCTION
4530 #undef NAMED_SUBROUTINE
4533 return GFC_STD_F2003
;
4537 /* Generate the given set of C interoperable kind objects, or all
4538 interoperable kinds. This function will only be given kind objects
4539 for valid iso_c_binding defined types because this is verified when
4540 the 'use' statement is parsed. If the user gives an 'only' clause,
4541 the specific kinds are looked up; if they don't exist, an error is
4542 reported. If the user does not give an 'only' clause, all
4543 iso_c_binding symbols are generated. If a list of specific kinds
4544 is given, it must have a NULL in the first empty spot to mark the
4545 end of the list. For C_null_(fun)ptr, dt_symtree has to be set and
4546 point to the symtree for c_(fun)ptr. */
4549 generate_isocbinding_symbol (const char *mod_name
, iso_c_binding_symbol s
,
4550 const char *local_name
, gfc_symtree
*dt_symtree
,
4553 const char *const name
= (local_name
&& local_name
[0])
4554 ? local_name
: c_interop_kinds_table
[s
].name
;
4555 gfc_symtree
*tmp_symtree
;
4556 gfc_symbol
*tmp_sym
= NULL
;
4559 if (gfc_notification_std (std_for_isocbinding_symbol (s
)) == ERROR
)
4562 tmp_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
, name
);
4564 && (!tmp_symtree
|| !tmp_symtree
->n
.sym
4565 || tmp_symtree
->n
.sym
->from_intmod
!= INTMOD_ISO_C_BINDING
4566 || tmp_symtree
->n
.sym
->intmod_sym_id
!= s
))
4569 /* Already exists in this scope so don't re-add it. */
4570 if (tmp_symtree
!= NULL
&& (tmp_sym
= tmp_symtree
->n
.sym
) != NULL
4571 && (!tmp_sym
->attr
.generic
4572 || (tmp_sym
= gfc_find_dt_in_generic (tmp_sym
)) != NULL
)
4573 && tmp_sym
->from_intmod
== INTMOD_ISO_C_BINDING
)
4575 if (tmp_sym
->attr
.flavor
== FL_DERIVED
4576 && !get_iso_c_binding_dt (tmp_sym
->intmod_sym_id
))
4578 gfc_dt_list
*dt_list
;
4579 dt_list
= gfc_get_dt_list ();
4580 dt_list
->derived
= tmp_sym
;
4581 dt_list
->next
= gfc_derived_types
;
4582 gfc_derived_types
= dt_list
;
4588 /* Create the sym tree in the current ns. */
4591 tmp_symtree
= gfc_get_unique_symtree (gfc_current_ns
);
4592 tmp_sym
= gfc_new_symbol (name
, gfc_current_ns
);
4594 /* Add to the list of tentative symbols. */
4595 latest_undo_chgset
->syms
.safe_push (tmp_sym
);
4596 tmp_sym
->old_symbol
= NULL
;
4598 tmp_sym
->gfc_new
= 1;
4600 tmp_symtree
->n
.sym
= tmp_sym
;
4605 gfc_get_sym_tree (name
, gfc_current_ns
, &tmp_symtree
, false);
4606 gcc_assert (tmp_symtree
);
4607 tmp_sym
= tmp_symtree
->n
.sym
;
4610 /* Say what module this symbol belongs to. */
4611 tmp_sym
->module
= gfc_get_string (mod_name
);
4612 tmp_sym
->from_intmod
= INTMOD_ISO_C_BINDING
;
4613 tmp_sym
->intmod_sym_id
= s
;
4614 tmp_sym
->attr
.is_iso_c
= 1;
4615 tmp_sym
->attr
.use_assoc
= 1;
4617 gcc_assert (dt_symtree
== NULL
|| s
== ISOCBINDING_NULL_FUNPTR
4618 || s
== ISOCBINDING_NULL_PTR
);
4623 #define NAMED_INTCST(a,b,c,d) case a :
4624 #define NAMED_REALCST(a,b,c,d) case a :
4625 #define NAMED_CMPXCST(a,b,c,d) case a :
4626 #define NAMED_LOGCST(a,b,c) case a :
4627 #define NAMED_CHARKNDCST(a,b,c) case a :
4628 #include "iso-c-binding.def"
4630 tmp_sym
->value
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
4631 c_interop_kinds_table
[s
].value
);
4633 /* Initialize an integer constant expression node. */
4634 tmp_sym
->attr
.flavor
= FL_PARAMETER
;
4635 tmp_sym
->ts
.type
= BT_INTEGER
;
4636 tmp_sym
->ts
.kind
= gfc_default_integer_kind
;
4638 /* Mark this type as a C interoperable one. */
4639 tmp_sym
->ts
.is_c_interop
= 1;
4640 tmp_sym
->ts
.is_iso_c
= 1;
4641 tmp_sym
->value
->ts
.is_c_interop
= 1;
4642 tmp_sym
->value
->ts
.is_iso_c
= 1;
4643 tmp_sym
->attr
.is_c_interop
= 1;
4645 /* Tell what f90 type this c interop kind is valid. */
4646 tmp_sym
->ts
.f90_type
= c_interop_kinds_table
[s
].f90_type
;
4651 #define NAMED_CHARCST(a,b,c) case a :
4652 #include "iso-c-binding.def"
4654 /* Initialize an integer constant expression node for the
4655 length of the character. */
4656 tmp_sym
->value
= gfc_get_character_expr (gfc_default_character_kind
,
4657 &gfc_current_locus
, NULL
, 1);
4658 tmp_sym
->value
->ts
.is_c_interop
= 1;
4659 tmp_sym
->value
->ts
.is_iso_c
= 1;
4660 tmp_sym
->value
->value
.character
.length
= 1;
4661 tmp_sym
->value
->value
.character
.string
[0]
4662 = (gfc_char_t
) c_interop_kinds_table
[s
].value
;
4663 tmp_sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4664 tmp_sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
,
4667 /* May not need this in both attr and ts, but do need in
4668 attr for writing module file. */
4669 tmp_sym
->attr
.is_c_interop
= 1;
4671 tmp_sym
->attr
.flavor
= FL_PARAMETER
;
4672 tmp_sym
->ts
.type
= BT_CHARACTER
;
4674 /* Need to set it to the C_CHAR kind. */
4675 tmp_sym
->ts
.kind
= gfc_default_character_kind
;
4677 /* Mark this type as a C interoperable one. */
4678 tmp_sym
->ts
.is_c_interop
= 1;
4679 tmp_sym
->ts
.is_iso_c
= 1;
4681 /* Tell what f90 type this c interop kind is valid. */
4682 tmp_sym
->ts
.f90_type
= BT_CHARACTER
;
4686 case ISOCBINDING_PTR
:
4687 case ISOCBINDING_FUNPTR
:
4690 gfc_dt_list
**dt_list_ptr
= NULL
;
4691 gfc_component
*tmp_comp
= NULL
;
4693 /* Generate real derived type. */
4698 const char *hidden_name
;
4699 gfc_interface
*intr
, *head
;
4701 hidden_name
= gfc_dt_upper_string (tmp_sym
->name
);
4702 tmp_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
4704 gcc_assert (tmp_symtree
== NULL
);
4705 gfc_get_sym_tree (hidden_name
, gfc_current_ns
, &tmp_symtree
, false);
4706 dt_sym
= tmp_symtree
->n
.sym
;
4707 dt_sym
->name
= gfc_get_string (s
== ISOCBINDING_PTR
4708 ? "c_ptr" : "c_funptr");
4710 /* Generate an artificial generic function. */
4711 head
= tmp_sym
->generic
;
4712 intr
= gfc_get_interface ();
4714 intr
->where
= gfc_current_locus
;
4716 tmp_sym
->generic
= intr
;
4718 if (!tmp_sym
->attr
.generic
4719 && !gfc_add_generic (&tmp_sym
->attr
, tmp_sym
->name
, NULL
))
4722 if (!tmp_sym
->attr
.function
4723 && !gfc_add_function (&tmp_sym
->attr
, tmp_sym
->name
, NULL
))
4727 /* Say what module this symbol belongs to. */
4728 dt_sym
->module
= gfc_get_string (mod_name
);
4729 dt_sym
->from_intmod
= INTMOD_ISO_C_BINDING
;
4730 dt_sym
->intmod_sym_id
= s
;
4731 dt_sym
->attr
.use_assoc
= 1;
4733 /* Initialize an integer constant expression node. */
4734 dt_sym
->attr
.flavor
= FL_DERIVED
;
4735 dt_sym
->ts
.is_c_interop
= 1;
4736 dt_sym
->attr
.is_c_interop
= 1;
4737 dt_sym
->attr
.private_comp
= 1;
4738 dt_sym
->component_access
= ACCESS_PRIVATE
;
4739 dt_sym
->ts
.is_iso_c
= 1;
4740 dt_sym
->ts
.type
= BT_DERIVED
;
4741 dt_sym
->ts
.f90_type
= BT_VOID
;
4743 /* A derived type must have the bind attribute to be
4744 interoperable (J3/04-007, Section 15.2.3), even though
4745 the binding label is not used. */
4746 dt_sym
->attr
.is_bind_c
= 1;
4748 dt_sym
->attr
.referenced
= 1;
4749 dt_sym
->ts
.u
.derived
= dt_sym
;
4751 /* Add the symbol created for the derived type to the current ns. */
4752 dt_list_ptr
= &(gfc_derived_types
);
4753 while (*dt_list_ptr
!= NULL
&& (*dt_list_ptr
)->next
!= NULL
)
4754 dt_list_ptr
= &((*dt_list_ptr
)->next
);
4756 /* There is already at least one derived type in the list, so append
4757 the one we're currently building for c_ptr or c_funptr. */
4758 if (*dt_list_ptr
!= NULL
)
4759 dt_list_ptr
= &((*dt_list_ptr
)->next
);
4760 (*dt_list_ptr
) = gfc_get_dt_list ();
4761 (*dt_list_ptr
)->derived
= dt_sym
;
4762 (*dt_list_ptr
)->next
= NULL
;
4764 gfc_add_component (dt_sym
, "c_address", &tmp_comp
);
4765 if (tmp_comp
== NULL
)
4768 tmp_comp
->ts
.type
= BT_INTEGER
;
4770 /* Set this because the module will need to read/write this field. */
4771 tmp_comp
->ts
.f90_type
= BT_INTEGER
;
4773 /* The kinds for c_ptr and c_funptr are the same. */
4774 index
= get_c_kind ("c_ptr", c_interop_kinds_table
);
4775 tmp_comp
->ts
.kind
= c_interop_kinds_table
[index
].value
;
4776 tmp_comp
->attr
.access
= ACCESS_PRIVATE
;
4778 /* Mark the component as C interoperable. */
4779 tmp_comp
->ts
.is_c_interop
= 1;
4784 case ISOCBINDING_NULL_PTR
:
4785 case ISOCBINDING_NULL_FUNPTR
:
4786 gen_special_c_interop_ptr (tmp_sym
, dt_symtree
);
4792 gfc_commit_symbol (tmp_sym
);
4797 /* Check that a symbol is already typed. If strict is not set, an untyped
4798 symbol is acceptable for non-standard-conforming mode. */
4801 gfc_check_symbol_typed (gfc_symbol
* sym
, gfc_namespace
* ns
,
4802 bool strict
, locus where
)
4806 if (gfc_matching_prefix
)
4809 /* Check for the type and try to give it an implicit one. */
4810 if (sym
->ts
.type
== BT_UNKNOWN
4811 && !gfc_set_default_type (sym
, 0, ns
))
4815 gfc_error ("Symbol %qs is used before it is typed at %L",
4820 if (!gfc_notify_std (GFC_STD_GNU
, "Symbol %qs is used before"
4821 " it is typed at %L", sym
->name
, &where
))
4825 /* Everything is ok. */
4830 /* Construct a typebound-procedure structure. Those are stored in a tentative
4831 list and marked `error' until symbols are committed. */
4834 gfc_get_typebound_proc (gfc_typebound_proc
*tb0
)
4836 gfc_typebound_proc
*result
;
4838 result
= XCNEW (gfc_typebound_proc
);
4843 latest_undo_chgset
->tbps
.safe_push (result
);
4849 /* Get the super-type of a given derived type. */
4852 gfc_get_derived_super_type (gfc_symbol
* derived
)
4854 gcc_assert (derived
);
4856 if (derived
->attr
.generic
)
4857 derived
= gfc_find_dt_in_generic (derived
);
4859 if (!derived
->attr
.extension
)
4862 gcc_assert (derived
->components
);
4863 gcc_assert (derived
->components
->ts
.type
== BT_DERIVED
);
4864 gcc_assert (derived
->components
->ts
.u
.derived
);
4866 if (derived
->components
->ts
.u
.derived
->attr
.generic
)
4867 return gfc_find_dt_in_generic (derived
->components
->ts
.u
.derived
);
4869 return derived
->components
->ts
.u
.derived
;
4873 /* Get the ultimate super-type of a given derived type. */
4876 gfc_get_ultimate_derived_super_type (gfc_symbol
* derived
)
4878 if (!derived
->attr
.extension
)
4881 derived
= gfc_get_derived_super_type (derived
);
4883 if (derived
->attr
.extension
)
4884 return gfc_get_ultimate_derived_super_type (derived
);
4890 /* Check if a derived type t2 is an extension of (or equal to) a type t1. */
4893 gfc_type_is_extension_of (gfc_symbol
*t1
, gfc_symbol
*t2
)
4895 while (!gfc_compare_derived_types (t1
, t2
) && t2
->attr
.extension
)
4896 t2
= gfc_get_derived_super_type (t2
);
4897 return gfc_compare_derived_types (t1
, t2
);
4901 /* Check if two typespecs are type compatible (F03:5.1.1.2):
4902 If ts1 is nonpolymorphic, ts2 must be the same type.
4903 If ts1 is polymorphic (CLASS), ts2 must be an extension of ts1. */
4906 gfc_type_compatible (gfc_typespec
*ts1
, gfc_typespec
*ts2
)
4908 bool is_class1
= (ts1
->type
== BT_CLASS
);
4909 bool is_class2
= (ts2
->type
== BT_CLASS
);
4910 bool is_derived1
= (ts1
->type
== BT_DERIVED
);
4911 bool is_derived2
= (ts2
->type
== BT_DERIVED
);
4912 bool is_union1
= (ts1
->type
== BT_UNION
);
4913 bool is_union2
= (ts2
->type
== BT_UNION
);
4916 && ts1
->u
.derived
->components
4917 && ((ts1
->u
.derived
->attr
.is_class
4918 && ts1
->u
.derived
->components
->ts
.u
.derived
->attr
4919 .unlimited_polymorphic
)
4920 || ts1
->u
.derived
->attr
.unlimited_polymorphic
))
4923 if (!is_derived1
&& !is_derived2
&& !is_class1
&& !is_class2
4924 && !is_union1
&& !is_union2
)
4925 return (ts1
->type
== ts2
->type
);
4927 if ((is_derived1
&& is_derived2
) || (is_union1
&& is_union2
))
4928 return gfc_compare_derived_types (ts1
->u
.derived
, ts2
->u
.derived
);
4930 if (is_derived1
&& is_class2
)
4931 return gfc_compare_derived_types (ts1
->u
.derived
,
4932 ts2
->u
.derived
->attr
.is_class
?
4933 ts2
->u
.derived
->components
->ts
.u
.derived
4935 if (is_class1
&& is_derived2
)
4936 return gfc_type_is_extension_of (ts1
->u
.derived
->attr
.is_class
?
4937 ts1
->u
.derived
->components
->ts
.u
.derived
4940 else if (is_class1
&& is_class2
)
4941 return gfc_type_is_extension_of (ts1
->u
.derived
->attr
.is_class
?
4942 ts1
->u
.derived
->components
->ts
.u
.derived
4944 ts2
->u
.derived
->attr
.is_class
?
4945 ts2
->u
.derived
->components
->ts
.u
.derived
4952 /* Find the parent-namespace of the current function. If we're inside
4953 BLOCK constructs, it may not be the current one. */
4956 gfc_find_proc_namespace (gfc_namespace
* ns
)
4958 while (ns
->construct_entities
)
4968 /* Check if an associate-variable should be translated as an `implicit' pointer
4969 internally (if it is associated to a variable and not an array with
4973 gfc_is_associate_pointer (gfc_symbol
* sym
)
4978 if (sym
->ts
.type
== BT_CLASS
)
4981 if (!sym
->assoc
->variable
)
4984 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_EXPLICIT
)
4992 gfc_find_dt_in_generic (gfc_symbol
*sym
)
4994 gfc_interface
*intr
= NULL
;
4996 if (!sym
|| gfc_fl_struct (sym
->attr
.flavor
))
4999 if (sym
->attr
.generic
)
5000 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
5001 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
5003 return intr
? intr
->sym
: NULL
;
5007 /* Get the dummy arguments from a procedure symbol. If it has been declared
5008 via a PROCEDURE statement with a named interface, ts.interface will be set
5009 and the arguments need to be taken from there. */
5011 gfc_formal_arglist
*
5012 gfc_sym_get_dummy_args (gfc_symbol
*sym
)
5014 gfc_formal_arglist
*dummies
;
5016 dummies
= sym
->formal
;
5017 if (dummies
== NULL
&& sym
->ts
.interface
!= NULL
)
5018 dummies
= sym
->ts
.interface
->formal
;