1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector
;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts
;
49 static symbol_attribute current_attr
;
50 static gfc_array_spec
*current_as
;
51 static int colon_seen
;
53 /* The current binding label (if any). */
54 static char curr_binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line
;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals
= 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr
*last_initializer
;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr
*initializer
;
74 struct enumerator_history
*next
;
78 /* Header of enum history chain. */
80 static enumerator_history
*enum_history
= NULL
;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history
*max_enum
= NULL
;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol
*gfc_new_block
;
90 bool gfc_matching_function
;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data
= false;
98 gfc_in_match_data (void)
100 return in_match_data
;
104 set_in_match_data (bool set_value
)
106 in_match_data
= set_value
;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable
*p
)
114 gfc_data_variable
*q
;
119 gfc_free_expr (p
->expr
);
120 gfc_free_iterator (&p
->iter
, 0);
121 free_variable (p
->list
);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value
*p
)
137 gfc_free_expr (p
->expr
);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data
*p
)
153 free_variable (p
->var
);
154 free_value (p
->value
);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace
*ns
)
176 static match
var_element (gfc_data_variable
*);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable
*parent
)
184 gfc_data_variable
*tail
, var
;
187 m
= var_element (&var
);
188 if (m
== MATCH_ERROR
)
193 tail
= gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES
)
203 m
= gfc_match_iterator (&parent
->iter
, 1);
206 if (m
== MATCH_ERROR
)
209 m
= var_element (&var
);
210 if (m
== MATCH_ERROR
)
215 tail
->next
= gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES
)
226 gfc_syntax_error (ST_DATA
);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable
*new_var
)
240 memset (new_var
, 0, sizeof (gfc_data_variable
));
242 if (gfc_match_char ('(') == MATCH_YES
)
243 return var_list (new_var
);
245 m
= gfc_match_variable (&new_var
->expr
, 0);
249 sym
= new_var
->expr
->symtree
->n
.sym
;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym
, gfc_current_ns
,
253 false, gfc_current_locus
) == FAILURE
)
256 if (!sym
->attr
.function
&& gfc_current_ns
->parent
257 && gfc_current_ns
->parent
== sym
->ns
)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym
->name
);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym
->attr
.in_common
266 && gfc_notify_std (GFC_STD_GNU
, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym
->name
) == FAILURE
)
271 if (gfc_add_data (&sym
->attr
, sym
->name
, &new_var
->expr
->where
) == FAILURE
)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data
*d
)
283 gfc_data_variable var
, *tail
, *new_var
;
290 m
= var_element (&var
);
293 if (m
== MATCH_ERROR
)
296 new_var
= gfc_get_data_variable ();
302 tail
->next
= new_var
;
306 if (gfc_match_char ('/') == MATCH_YES
)
308 if (gfc_match_char (',') != MATCH_YES
)
315 gfc_syntax_error (ST_DATA
);
316 gfc_free_data_all (gfc_current_ns
);
322 match_data_constant (gfc_expr
**result
)
324 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
330 m
= gfc_match_literal_constant (&expr
, 1);
337 if (m
== MATCH_ERROR
)
340 m
= gfc_match_null (result
);
344 old_loc
= gfc_current_locus
;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m
= gfc_match_rvalue (result
);
349 if (m
== MATCH_ERROR
)
352 if (m
== MATCH_YES
&& (*result
)->expr_type
== EXPR_STRUCTURE
)
354 if (gfc_simplify_expr (*result
, 0) == FAILURE
)
359 gfc_current_locus
= old_loc
;
361 m
= gfc_match_name (name
);
365 if (gfc_find_symbol (name
, NULL
, 1, &sym
))
369 || (sym
->attr
.flavor
!= FL_PARAMETER
&& sym
->attr
.flavor
!= FL_DERIVED
))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym
->attr
.flavor
== FL_DERIVED
)
376 return gfc_match_structure_constructor (sym
, result
, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym
->value
->expr_type
== EXPR_ARRAY
)
381 gfc_current_locus
= old_loc
;
383 m
= gfc_match_init_expr (result
);
384 if (m
== MATCH_ERROR
)
389 if (gfc_simplify_expr (*result
, 0) == FAILURE
)
392 if ((*result
)->expr_type
== EXPR_CONSTANT
)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name
);
402 *result
= gfc_copy_expr (sym
->value
);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data
*data
)
413 gfc_data_value
*new_val
, *tail
;
421 m
= match_data_constant (&expr
);
424 if (m
== MATCH_ERROR
)
427 new_val
= gfc_get_data_value ();
428 mpz_init (new_val
->repeat
);
431 data
->value
= new_val
;
433 tail
->next
= new_val
;
437 if (expr
->ts
.type
!= BT_INTEGER
|| gfc_match_char ('*') != MATCH_YES
)
440 mpz_set_ui (tail
->repeat
, 1);
444 if (expr
->ts
.type
== BT_INTEGER
)
445 mpz_set (tail
->repeat
, expr
->value
.integer
);
446 gfc_free_expr (expr
);
448 m
= match_data_constant (&tail
->expr
);
451 if (m
== MATCH_ERROR
)
455 if (gfc_match_char ('/') == MATCH_YES
)
457 if (gfc_match_char (',') == MATCH_NO
)
464 gfc_syntax_error (ST_DATA
);
465 gfc_free_data_all (gfc_current_ns
);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name
)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name
, NULL
, 0, &st
);
484 newdata
= gfc_get_data ();
485 newdata
->var
= gfc_get_data_variable ();
486 newdata
->var
->expr
= gfc_get_variable_expr (st
);
487 newdata
->where
= gfc_current_locus
;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m
= top_val_list (newdata
);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym
->attr
, sym
->name
, &sym
->declared_at
) == FAILURE
)
511 /* Chain in namespace list of DATA initializers. */
512 newdata
->next
= gfc_current_ns
->data
;
513 gfc_current_ns
->data
= newdata
;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data
= gfc_get_data ();
535 new_data
->where
= gfc_current_locus
;
537 m
= top_var_list (new_data
);
541 m
= top_val_list (new_data
);
545 new_data
->next
= gfc_current_ns
->data
;
546 gfc_current_ns
->data
= new_data
;
548 if (gfc_match_eos () == MATCH_YES
)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data
);
571 /************************ Declaration statements *********************/
574 /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */
577 merge_array_spec (gfc_array_spec
*from
, gfc_array_spec
*to
, bool copy
)
581 if (to
->rank
== 0 && from
->rank
> 0)
583 to
->rank
= from
->rank
;
584 to
->type
= from
->type
;
585 to
->cray_pointee
= from
->cray_pointee
;
586 to
->cp_was_assumed
= from
->cp_was_assumed
;
588 for (i
= 0; i
< to
->corank
; i
++)
590 to
->lower
[from
->rank
+ i
] = to
->lower
[i
];
591 to
->upper
[from
->rank
+ i
] = to
->upper
[i
];
593 for (i
= 0; i
< from
->rank
; i
++)
597 to
->lower
[i
] = gfc_copy_expr (from
->lower
[i
]);
598 to
->upper
[i
] = gfc_copy_expr (from
->upper
[i
]);
602 to
->lower
[i
] = from
->lower
[i
];
603 to
->upper
[i
] = from
->upper
[i
];
607 else if (to
->corank
== 0 && from
->corank
> 0)
609 to
->corank
= from
->corank
;
610 to
->cotype
= from
->cotype
;
612 for (i
= 0; i
< from
->corank
; i
++)
616 to
->lower
[to
->rank
+ i
] = gfc_copy_expr (from
->lower
[i
]);
617 to
->upper
[to
->rank
+ i
] = gfc_copy_expr (from
->upper
[i
]);
621 to
->lower
[to
->rank
+ i
] = from
->lower
[i
];
622 to
->upper
[to
->rank
+ i
] = from
->upper
[i
];
629 /* Match an intent specification. Since this can only happen after an
630 INTENT word, a legal intent-spec must follow. */
633 match_intent_spec (void)
636 if (gfc_match (" ( in out )") == MATCH_YES
)
638 if (gfc_match (" ( in )") == MATCH_YES
)
640 if (gfc_match (" ( out )") == MATCH_YES
)
643 gfc_error ("Bad INTENT specification at %C");
644 return INTENT_UNKNOWN
;
648 /* Matches a character length specification, which is either a
649 specification expression or a '*'. */
652 char_len_param_value (gfc_expr
**expr
)
656 if (gfc_match_char ('*') == MATCH_YES
)
662 m
= gfc_match_expr (expr
);
665 && gfc_expr_check_typed (*expr
, gfc_current_ns
, false) == FAILURE
)
668 if (m
== MATCH_YES
&& (*expr
)->expr_type
== EXPR_FUNCTION
)
670 if ((*expr
)->value
.function
.actual
671 && (*expr
)->value
.function
.actual
->expr
->symtree
)
674 e
= (*expr
)->value
.function
.actual
->expr
;
675 if (e
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
676 && e
->expr_type
== EXPR_VARIABLE
)
678 if (e
->symtree
->n
.sym
->ts
.type
== BT_UNKNOWN
)
680 if (e
->symtree
->n
.sym
->ts
.type
== BT_CHARACTER
681 && e
->symtree
->n
.sym
->ts
.u
.cl
682 && e
->symtree
->n
.sym
->ts
.u
.cl
->length
->ts
.type
== BT_UNKNOWN
)
690 gfc_error ("Conflict in attributes of function argument at %C");
695 /* A character length is a '*' followed by a literal integer or a
696 char_len_param_value in parenthesis. */
699 match_char_length (gfc_expr
**expr
)
704 m
= gfc_match_char ('*');
708 m
= gfc_match_small_literal_int (&length
, NULL
);
709 if (m
== MATCH_ERROR
)
714 if (gfc_notify_std (GFC_STD_F95_OBS
, "Obsolescent feature: "
715 "Old-style character length at %C") == FAILURE
)
717 *expr
= gfc_int_expr (length
);
721 if (gfc_match_char ('(') == MATCH_NO
)
724 m
= char_len_param_value (expr
);
725 if (m
!= MATCH_YES
&& gfc_matching_function
)
731 if (m
== MATCH_ERROR
)
736 if (gfc_match_char (')') == MATCH_NO
)
738 gfc_free_expr (*expr
);
746 gfc_error ("Syntax error in character length specification at %C");
751 /* Special subroutine for finding a symbol. Check if the name is found
752 in the current name space. If not, and we're compiling a function or
753 subroutine and the parent compilation unit is an interface, then check
754 to see if the name we've been given is the name of the interface
755 (located in another namespace). */
758 find_special (const char *name
, gfc_symbol
**result
, bool allow_subroutine
)
764 i
= gfc_get_sym_tree (name
, NULL
, &st
, allow_subroutine
);
767 *result
= st
? st
->n
.sym
: NULL
;
771 if (gfc_current_state () != COMP_SUBROUTINE
772 && gfc_current_state () != COMP_FUNCTION
)
775 s
= gfc_state_stack
->previous
;
779 if (s
->state
!= COMP_INTERFACE
)
782 goto end
; /* Nameless interface. */
784 if (strcmp (name
, s
->sym
->name
) == 0)
795 /* Special subroutine for getting a symbol node associated with a
796 procedure name, used in SUBROUTINE and FUNCTION statements. The
797 symbol is created in the parent using with symtree node in the
798 child unit pointing to the symbol. If the current namespace has no
799 parent, then the symbol is just created in the current unit. */
802 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
808 /* Module functions have to be left in their own namespace because
809 they have potentially (almost certainly!) already been referenced.
810 In this sense, they are rather like external functions. This is
811 fixed up in resolve.c(resolve_entries), where the symbol name-
812 space is set to point to the master function, so that the fake
813 result mechanism can work. */
814 if (module_fcn_entry
)
816 /* Present if entry is declared to be a module procedure. */
817 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
820 rc
= gfc_get_symbol (name
, NULL
, result
);
821 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
822 && (*result
)->ts
.type
== BT_UNKNOWN
823 && sym
->attr
.flavor
== FL_UNKNOWN
)
824 /* Pick up the typespec for the entry, if declared in the function
825 body. Note that this symbol is FL_UNKNOWN because it will
826 only have appeared in a type declaration. The local symtree
827 is set to point to the module symbol and a unique symtree
828 to the local version. This latter ensures a correct clearing
831 /* If the ENTRY proceeds its specification, we need to ensure
832 that this does not raise a "has no IMPLICIT type" error. */
833 if (sym
->ts
.type
== BT_UNKNOWN
)
834 sym
->attr
.untyped
= 1;
836 (*result
)->ts
= sym
->ts
;
838 /* Put the symbol in the procedure namespace so that, should
839 the ENTRY precede its specification, the specification
841 (*result
)->ns
= gfc_current_ns
;
843 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
845 st
= gfc_get_unique_symtree (gfc_current_ns
);
850 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
856 gfc_current_ns
->refs
++;
858 if (sym
&& !sym
->gfc_new
&& gfc_current_state () != COMP_INTERFACE
)
860 /* Trap another encompassed procedure with the same name. All
861 these conditions are necessary to avoid picking up an entry
862 whose name clashes with that of the encompassing procedure;
863 this is handled using gsymbols to register unique,globally
865 if (sym
->attr
.flavor
!= 0
866 && sym
->attr
.proc
!= 0
867 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
868 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
869 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
870 name
, &sym
->declared_at
);
872 /* Trap a procedure with a name the same as interface in the
873 encompassing scope. */
874 if (sym
->attr
.generic
!= 0
875 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
876 && !sym
->attr
.mod_proc
)
877 gfc_error_now ("Name '%s' at %C is already defined"
878 " as a generic interface at %L",
879 name
, &sym
->declared_at
);
881 /* Trap declarations of attributes in encompassing scope. The
882 signature for this is that ts.kind is set. Legitimate
883 references only set ts.type. */
884 if (sym
->ts
.kind
!= 0
885 && !sym
->attr
.implicit_type
886 && sym
->attr
.proc
== 0
887 && gfc_current_ns
->parent
!= NULL
888 && sym
->attr
.access
== 0
889 && !module_fcn_entry
)
890 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
891 "and must not have attributes declared at %L",
892 name
, &sym
->declared_at
);
895 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
898 /* Module function entries will already have a symtree in
899 the current namespace but will need one at module level. */
900 if (module_fcn_entry
)
902 /* Present if entry is declared to be a module procedure. */
903 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
905 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
908 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
913 /* See if the procedure should be a module procedure. */
915 if (((sym
->ns
->proc_name
!= NULL
916 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
917 && sym
->attr
.proc
!= PROC_MODULE
)
918 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
919 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
920 sym
->name
, NULL
) == FAILURE
)
927 /* Verify that the given symbol representing a parameter is C
928 interoperable, by checking to see if it was marked as such after
929 its declaration. If the given symbol is not interoperable, a
930 warning is reported, thus removing the need to return the status to
931 the calling function. The standard does not require the user use
932 one of the iso_c_binding named constants to declare an
933 interoperable parameter, but we can't be sure if the param is C
934 interop or not if the user doesn't. For example, integer(4) may be
935 legal Fortran, but doesn't have meaning in C. It may interop with
936 a number of the C types, which causes a problem because the
937 compiler can't know which one. This code is almost certainly not
938 portable, and the user will get what they deserve if the C type
939 across platforms isn't always interoperable with integer(4). If
940 the user had used something like integer(c_int) or integer(c_long),
941 the compiler could have automatically handled the varying sizes
945 verify_c_interop_param (gfc_symbol
*sym
)
947 int is_c_interop
= 0;
948 gfc_try retval
= SUCCESS
;
950 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
951 Don't repeat the checks here. */
952 if (sym
->attr
.implicit_type
)
955 /* For subroutines or functions that are passed to a BIND(C) procedure,
956 they're interoperable if they're BIND(C) and their params are all
958 if (sym
->attr
.flavor
== FL_PROCEDURE
)
960 if (sym
->attr
.is_bind_c
== 0)
962 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
963 "attribute to be C interoperable", sym
->name
,
964 &(sym
->declared_at
));
970 if (sym
->attr
.is_c_interop
== 1)
971 /* We've already checked this procedure; don't check it again. */
974 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
979 /* See if we've stored a reference to a procedure that owns sym. */
980 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
982 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
985 (verify_c_interop (&(sym
->ts
))
988 if (is_c_interop
!= 1)
990 /* Make personalized messages to give better feedback. */
991 if (sym
->ts
.type
== BT_DERIVED
)
992 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
993 " procedure '%s' but is not C interoperable "
994 "because derived type '%s' is not C interoperable",
995 sym
->name
, &(sym
->declared_at
),
996 sym
->ns
->proc_name
->name
,
997 sym
->ts
.u
.derived
->name
);
999 gfc_warning ("Variable '%s' at %L is a parameter to the "
1000 "BIND(C) procedure '%s' but may not be C "
1002 sym
->name
, &(sym
->declared_at
),
1003 sym
->ns
->proc_name
->name
);
1006 /* Character strings are only C interoperable if they have a
1008 if (sym
->ts
.type
== BT_CHARACTER
)
1010 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
1011 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
1012 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
1014 gfc_error ("Character argument '%s' at %L "
1015 "must be length 1 because "
1016 "procedure '%s' is BIND(C)",
1017 sym
->name
, &sym
->declared_at
,
1018 sym
->ns
->proc_name
->name
);
1023 /* We have to make sure that any param to a bind(c) routine does
1024 not have the allocatable, pointer, or optional attributes,
1025 according to J3/04-007, section 5.1. */
1026 if (sym
->attr
.allocatable
== 1)
1028 gfc_error ("Variable '%s' at %L cannot have the "
1029 "ALLOCATABLE attribute because procedure '%s'"
1030 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
1031 sym
->ns
->proc_name
->name
);
1035 if (sym
->attr
.pointer
== 1)
1037 gfc_error ("Variable '%s' at %L cannot have the "
1038 "POINTER attribute because procedure '%s'"
1039 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
1040 sym
->ns
->proc_name
->name
);
1044 if (sym
->attr
.optional
== 1)
1046 gfc_error ("Variable '%s' at %L cannot have the "
1047 "OPTIONAL attribute because procedure '%s'"
1048 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
1049 sym
->ns
->proc_name
->name
);
1053 /* Make sure that if it has the dimension attribute, that it is
1054 either assumed size or explicit shape. */
1055 if (sym
->as
!= NULL
)
1057 if (sym
->as
->type
== AS_ASSUMED_SHAPE
)
1059 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1060 "argument to the procedure '%s' at %L because "
1061 "the procedure is BIND(C)", sym
->name
,
1062 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1063 &(sym
->ns
->proc_name
->declared_at
));
1067 if (sym
->as
->type
== AS_DEFERRED
)
1069 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1070 "argument to the procedure '%s' at %L because "
1071 "the procedure is BIND(C)", sym
->name
,
1072 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1073 &(sym
->ns
->proc_name
->declared_at
));
1085 /* Function called by variable_decl() that adds a name to the symbol table. */
1088 build_sym (const char *name
, gfc_charlen
*cl
,
1089 gfc_array_spec
**as
, locus
*var_locus
)
1091 symbol_attribute attr
;
1094 if (gfc_get_symbol (name
, NULL
, &sym
))
1097 /* Start updating the symbol table. Add basic type attribute if present. */
1098 if (current_ts
.type
!= BT_UNKNOWN
1099 && (sym
->attr
.implicit_type
== 0
1100 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1101 && gfc_add_type (sym
, ¤t_ts
, var_locus
) == FAILURE
)
1104 if (sym
->ts
.type
== BT_CHARACTER
)
1107 /* Add dimension attribute if present. */
1108 if (gfc_set_array_spec (sym
, *as
, var_locus
) == FAILURE
)
1112 /* Add attribute to symbol. The copy is so that we can reset the
1113 dimension attribute. */
1114 attr
= current_attr
;
1116 attr
.codimension
= 0;
1118 if (gfc_copy_attr (&sym
->attr
, &attr
, var_locus
) == FAILURE
)
1121 /* Finish any work that may need to be done for the binding label,
1122 if it's a bind(c). The bind(c) attr is found before the symbol
1123 is made, and before the symbol name (for data decls), so the
1124 current_ts is holding the binding label, or nothing if the
1125 name= attr wasn't given. Therefore, test here if we're dealing
1126 with a bind(c) and make sure the binding label is set correctly. */
1127 if (sym
->attr
.is_bind_c
== 1)
1129 if (sym
->binding_label
[0] == '\0')
1131 /* Set the binding label and verify that if a NAME= was specified
1132 then only one identifier was in the entity-decl-list. */
1133 if (set_binding_label (sym
->binding_label
, sym
->name
,
1134 num_idents_on_line
) == FAILURE
)
1139 /* See if we know we're in a common block, and if it's a bind(c)
1140 common then we need to make sure we're an interoperable type. */
1141 if (sym
->attr
.in_common
== 1)
1143 /* Test the common block object. */
1144 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1145 && sym
->ts
.is_c_interop
!= 1)
1147 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1148 "must be declared with a C interoperable "
1149 "kind since common block '%s' is BIND(C)",
1150 sym
->name
, sym
->common_block
->name
,
1151 sym
->common_block
->name
);
1156 sym
->attr
.implied_index
= 0;
1158 if (sym
->ts
.type
== BT_CLASS
)
1160 sym
->attr
.class_ok
= (sym
->attr
.dummy
1161 || sym
->attr
.pointer
1162 || sym
->attr
.allocatable
) ? 1 : 0;
1163 gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
);
1170 /* Set character constant to the given length. The constant will be padded or
1171 truncated. If we're inside an array constructor without a typespec, we
1172 additionally check that all elements have the same length; check_len -1
1173 means no checking. */
1176 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1181 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1182 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1184 slen
= expr
->value
.character
.length
;
1187 s
= gfc_get_wide_string (len
+ 1);
1188 memcpy (s
, expr
->value
.character
.string
,
1189 MIN (len
, slen
) * sizeof (gfc_char_t
));
1191 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1193 if (gfc_option
.warn_character_truncation
&& slen
> len
)
1194 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1195 "(%d/%d)", &expr
->where
, slen
, len
);
1197 /* Apply the standard by 'hand' otherwise it gets cleared for
1199 if (check_len
!= -1 && slen
!= check_len
1200 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1201 gfc_error_now ("The CHARACTER elements of the array constructor "
1202 "at %L must have the same length (%d/%d)",
1203 &expr
->where
, slen
, check_len
);
1206 gfc_free (expr
->value
.character
.string
);
1207 expr
->value
.character
.string
= s
;
1208 expr
->value
.character
.length
= len
;
1213 /* Function to create and update the enumerator history
1214 using the information passed as arguments.
1215 Pointer "max_enum" is also updated, to point to
1216 enum history node containing largest initializer.
1218 SYM points to the symbol node of enumerator.
1219 INIT points to its enumerator value. */
1222 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1224 enumerator_history
*new_enum_history
;
1225 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1227 new_enum_history
= XCNEW (enumerator_history
);
1229 new_enum_history
->sym
= sym
;
1230 new_enum_history
->initializer
= init
;
1231 new_enum_history
->next
= NULL
;
1233 if (enum_history
== NULL
)
1235 enum_history
= new_enum_history
;
1236 max_enum
= enum_history
;
1240 new_enum_history
->next
= enum_history
;
1241 enum_history
= new_enum_history
;
1243 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1244 new_enum_history
->initializer
->value
.integer
) < 0)
1245 max_enum
= new_enum_history
;
1250 /* Function to free enum kind history. */
1253 gfc_free_enum_history (void)
1255 enumerator_history
*current
= enum_history
;
1256 enumerator_history
*next
;
1258 while (current
!= NULL
)
1260 next
= current
->next
;
1265 enum_history
= NULL
;
1269 /* Function called by variable_decl() that adds an initialization
1270 expression to a symbol. */
1273 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1275 symbol_attribute attr
;
1280 if (find_special (name
, &sym
, false))
1285 /* If this symbol is confirming an implicit parameter type,
1286 then an initialization expression is not allowed. */
1287 if (attr
.flavor
== FL_PARAMETER
1288 && sym
->value
!= NULL
1291 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1298 /* An initializer is required for PARAMETER declarations. */
1299 if (attr
.flavor
== FL_PARAMETER
)
1301 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1307 /* If a variable appears in a DATA block, it cannot have an
1311 gfc_error ("Variable '%s' at %C with an initializer already "
1312 "appears in a DATA statement", sym
->name
);
1316 /* Check if the assignment can happen. This has to be put off
1317 until later for a derived type variable. */
1318 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1319 && sym
->ts
.type
!= BT_CLASS
&& init
->ts
.type
!= BT_CLASS
1320 && gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1323 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.u
.cl
1324 && init
->ts
.type
== BT_CHARACTER
)
1326 /* Update symbol character length according initializer. */
1327 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1330 if (sym
->ts
.u
.cl
->length
== NULL
)
1333 /* If there are multiple CHARACTER variables declared on the
1334 same line, we don't want them to share the same length. */
1335 sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1337 if (sym
->attr
.flavor
== FL_PARAMETER
)
1339 if (init
->expr_type
== EXPR_CONSTANT
)
1341 clen
= init
->value
.character
.length
;
1342 sym
->ts
.u
.cl
->length
= gfc_int_expr (clen
);
1344 else if (init
->expr_type
== EXPR_ARRAY
)
1346 gfc_expr
*p
= init
->value
.constructor
->expr
;
1347 clen
= p
->value
.character
.length
;
1348 sym
->ts
.u
.cl
->length
= gfc_int_expr (clen
);
1350 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
1351 sym
->ts
.u
.cl
->length
=
1352 gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
1355 /* Update initializer character length according symbol. */
1356 else if (sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1358 int len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
1359 gfc_constructor
* p
;
1361 if (init
->expr_type
== EXPR_CONSTANT
)
1362 gfc_set_constant_character_len (len
, init
, -1);
1363 else if (init
->expr_type
== EXPR_ARRAY
)
1365 /* Build a new charlen to prevent simplification from
1366 deleting the length before it is resolved. */
1367 init
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1368 init
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->ts
.u
.cl
->length
);
1370 for (p
= init
->value
.constructor
; p
; p
= p
->next
)
1371 gfc_set_constant_character_len (len
, p
->expr
, -1);
1376 /* Need to check if the expression we initialized this
1377 to was one of the iso_c_binding named constants. If so,
1378 and we're a parameter (constant), let it be iso_c.
1380 integer(c_int), parameter :: my_int = c_int
1381 integer(my_int) :: my_int_2
1382 If we mark my_int as iso_c (since we can see it's value
1383 is equal to one of the named constants), then my_int_2
1384 will be considered C interoperable. */
1385 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1387 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1388 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1389 /* attr bits needed for module files. */
1390 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1391 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1392 if (init
->ts
.is_iso_c
)
1393 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1396 /* Add initializer. Make sure we keep the ranks sane. */
1397 if (sym
->attr
.dimension
&& init
->rank
== 0)
1403 if (sym
->attr
.flavor
== FL_PARAMETER
1404 && init
->expr_type
== EXPR_CONSTANT
1405 && spec_size (sym
->as
, &size
) == SUCCESS
1406 && mpz_cmp_si (size
, 0) > 0)
1408 array
= gfc_start_constructor (init
->ts
.type
, init
->ts
.kind
,
1411 array
->value
.constructor
= c
= NULL
;
1412 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1414 if (array
->value
.constructor
== NULL
)
1416 array
->value
.constructor
= c
= gfc_get_constructor ();
1421 c
->next
= gfc_get_constructor ();
1423 c
->expr
= gfc_copy_expr (init
);
1427 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1428 for (n
= 0; n
< sym
->as
->rank
; n
++)
1429 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1434 init
->rank
= sym
->as
->rank
;
1438 if (sym
->attr
.save
== SAVE_NONE
)
1439 sym
->attr
.save
= SAVE_IMPLICIT
;
1447 /* Function called by variable_decl() that adds a name to a structure
1451 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1452 gfc_array_spec
**as
)
1455 gfc_try t
= SUCCESS
;
1457 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1458 constructing, it must have the pointer attribute. */
1459 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1460 && current_ts
.u
.derived
== gfc_current_block ()
1461 && current_attr
.pointer
== 0)
1463 gfc_error ("Component at %C must have the POINTER attribute");
1467 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1469 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1471 gfc_error ("Array component of structure at %C must have explicit "
1472 "or deferred shape");
1477 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
1481 if (c
->ts
.type
== BT_CHARACTER
)
1483 c
->attr
= current_attr
;
1485 c
->initializer
= *init
;
1492 c
->attr
.codimension
= 1;
1494 c
->attr
.dimension
= 1;
1498 /* Should this ever get more complicated, combine with similar section
1499 in add_init_expr_to_sym into a separate function. */
1500 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
&& c
->ts
.u
.cl
1501 && c
->ts
.u
.cl
->length
&& c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1505 gcc_assert (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
);
1506 gcc_assert (c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1507 gcc_assert (c
->ts
.u
.cl
->length
->ts
.type
== BT_INTEGER
);
1509 len
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
1511 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1512 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1513 else if (mpz_cmp (c
->ts
.u
.cl
->length
->value
.integer
,
1514 c
->initializer
->ts
.u
.cl
->length
->value
.integer
))
1517 gfc_constructor
*ctor
= c
->initializer
->value
.constructor
;
1519 has_ts
= (c
->initializer
->ts
.u
.cl
1520 && c
->initializer
->ts
.u
.cl
->length_from_typespec
);
1526 /* Remember the length of the first element for checking
1527 that all elements *in the constructor* have the same
1528 length. This need not be the length of the LHS! */
1529 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1530 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1531 first_len
= ctor
->expr
->value
.character
.length
;
1533 for (; ctor
; ctor
= ctor
->next
)
1535 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1536 gfc_set_constant_character_len (len
, ctor
->expr
,
1537 has_ts
? -1 : first_len
);
1543 /* Check array components. */
1544 if (!c
->attr
.dimension
)
1547 if (c
->attr
.pointer
)
1549 if (c
->as
->type
!= AS_DEFERRED
)
1551 gfc_error ("Pointer array component of structure at %C must have a "
1556 else if (c
->attr
.allocatable
)
1558 if (c
->as
->type
!= AS_DEFERRED
)
1560 gfc_error ("Allocatable component of structure at %C must have a "
1567 if (c
->as
->type
!= AS_EXPLICIT
)
1569 gfc_error ("Array component of structure at %C must have an "
1576 if (c
->ts
.type
== BT_CLASS
)
1577 gfc_build_class_symbol (&c
->ts
, &c
->attr
, &c
->as
);
1583 /* Match a 'NULL()', and possibly take care of some side effects. */
1586 gfc_match_null (gfc_expr
**result
)
1592 m
= gfc_match (" null ( )");
1596 /* The NULL symbol now has to be/become an intrinsic function. */
1597 if (gfc_get_symbol ("null", NULL
, &sym
))
1599 gfc_error ("NULL() initialization at %C is ambiguous");
1603 gfc_intrinsic_symbol (sym
);
1605 if (sym
->attr
.proc
!= PROC_INTRINSIC
1606 && (gfc_add_procedure (&sym
->attr
, PROC_INTRINSIC
,
1607 sym
->name
, NULL
) == FAILURE
1608 || gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
))
1611 e
= gfc_get_expr ();
1612 e
->where
= gfc_current_locus
;
1613 e
->expr_type
= EXPR_NULL
;
1614 e
->ts
.type
= BT_UNKNOWN
;
1622 /* Match a variable name with an optional initializer. When this
1623 subroutine is called, a variable is expected to be parsed next.
1624 Depending on what is happening at the moment, updates either the
1625 symbol table or the current interface. */
1628 variable_decl (int elem
)
1630 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1631 gfc_expr
*initializer
, *char_len
;
1633 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1644 /* When we get here, we've just matched a list of attributes and
1645 maybe a type and a double colon. The next thing we expect to see
1646 is the name of the symbol. */
1647 m
= gfc_match_name (name
);
1651 var_locus
= gfc_current_locus
;
1653 /* Now we could see the optional array spec. or character length. */
1654 m
= gfc_match_array_spec (&as
, true, true);
1655 if (gfc_option
.flag_cray_pointer
&& m
== MATCH_YES
)
1656 cp_as
= gfc_copy_array_spec (as
);
1657 else if (m
== MATCH_ERROR
)
1661 as
= gfc_copy_array_spec (current_as
);
1662 else if (current_as
)
1663 merge_array_spec (current_as
, as
, true);
1668 if (current_ts
.type
== BT_CHARACTER
)
1670 switch (match_char_length (&char_len
))
1673 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1675 cl
->length
= char_len
;
1678 /* Non-constant lengths need to be copied after the first
1679 element. Also copy assumed lengths. */
1682 && (current_ts
.u
.cl
->length
== NULL
1683 || current_ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1685 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1686 cl
->length
= gfc_copy_expr (current_ts
.u
.cl
->length
);
1689 cl
= current_ts
.u
.cl
;
1698 /* If this symbol has already shown up in a Cray Pointer declaration,
1699 then we want to set the type & bail out. */
1700 if (gfc_option
.flag_cray_pointer
)
1702 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1703 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
1705 sym
->ts
.type
= current_ts
.type
;
1706 sym
->ts
.kind
= current_ts
.kind
;
1708 sym
->ts
.u
.derived
= current_ts
.u
.derived
;
1709 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
1710 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
1713 /* Check to see if we have an array specification. */
1716 if (sym
->as
!= NULL
)
1718 gfc_error ("Duplicate array spec for Cray pointee at %C");
1719 gfc_free_array_spec (cp_as
);
1725 if (gfc_set_array_spec (sym
, cp_as
, &var_locus
) == FAILURE
)
1726 gfc_internal_error ("Couldn't set pointee array spec.");
1728 /* Fix the array spec. */
1729 m
= gfc_mod_pointee_as (sym
->as
);
1730 if (m
== MATCH_ERROR
)
1738 gfc_free_array_spec (cp_as
);
1742 /* Procedure pointer as function result. */
1743 if (gfc_current_state () == COMP_FUNCTION
1744 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
1745 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
1746 strcpy (name
, "ppr@");
1748 if (gfc_current_state () == COMP_FUNCTION
1749 && strcmp (name
, gfc_current_block ()->name
) == 0
1750 && gfc_current_block ()->result
1751 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
1752 strcpy (name
, "ppr@");
1754 /* OK, we've successfully matched the declaration. Now put the
1755 symbol in the current namespace, because it might be used in the
1756 optional initialization expression for this symbol, e.g. this is
1759 integer, parameter :: i = huge(i)
1761 This is only true for parameters or variables of a basic type.
1762 For components of derived types, it is not true, so we don't
1763 create a symbol for those yet. If we fail to create the symbol,
1765 if (gfc_current_state () != COMP_DERIVED
1766 && build_sym (name
, cl
, &as
, &var_locus
) == FAILURE
)
1772 /* An interface body specifies all of the procedure's
1773 characteristics and these shall be consistent with those
1774 specified in the procedure definition, except that the interface
1775 may specify a procedure that is not pure if the procedure is
1776 defined to be pure(12.3.2). */
1777 if (current_ts
.type
== BT_DERIVED
1778 && gfc_current_ns
->proc_name
1779 && gfc_current_ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
1780 && current_ts
.u
.derived
->ns
!= gfc_current_ns
)
1783 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, current_ts
.u
.derived
->name
);
1784 if (!(current_ts
.u
.derived
->attr
.imported
1786 && st
->n
.sym
== current_ts
.u
.derived
)
1787 && !gfc_current_ns
->has_import_set
)
1789 gfc_error ("the type of '%s' at %C has not been declared within the "
1796 /* In functions that have a RESULT variable defined, the function
1797 name always refers to function calls. Therefore, the name is
1798 not allowed to appear in specification statements. */
1799 if (gfc_current_state () == COMP_FUNCTION
1800 && gfc_current_block () != NULL
1801 && gfc_current_block ()->result
!= NULL
1802 && gfc_current_block ()->result
!= gfc_current_block ()
1803 && strcmp (gfc_current_block ()->name
, name
) == 0)
1805 gfc_error ("Function name '%s' not allowed at %C", name
);
1810 /* We allow old-style initializations of the form
1811 integer i /2/, j(4) /3*3, 1/
1812 (if no colon has been seen). These are different from data
1813 statements in that initializers are only allowed to apply to the
1814 variable immediately preceding, i.e.
1816 is not allowed. Therefore we have to do some work manually, that
1817 could otherwise be left to the matchers for DATA statements. */
1819 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
1821 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Old-style "
1822 "initialization at %C") == FAILURE
)
1825 return match_old_style_init (name
);
1828 /* The double colon must be present in order to have initializers.
1829 Otherwise the statement is ambiguous with an assignment statement. */
1832 if (gfc_match (" =>") == MATCH_YES
)
1834 if (!current_attr
.pointer
)
1836 gfc_error ("Initialization at %C isn't for a pointer variable");
1841 m
= gfc_match_null (&initializer
);
1844 gfc_error ("Pointer initialization requires a NULL() at %C");
1848 if (gfc_pure (NULL
) && gfc_state_stack
->state
!= COMP_DERIVED
)
1850 gfc_error ("Initialization of pointer at %C is not allowed in "
1851 "a PURE procedure");
1859 else if (gfc_match_char ('=') == MATCH_YES
)
1861 if (current_attr
.pointer
)
1863 gfc_error ("Pointer initialization at %C requires '=>', "
1869 m
= gfc_match_init_expr (&initializer
);
1872 gfc_error ("Expected an initialization expression at %C");
1876 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
)
1877 && gfc_state_stack
->state
!= COMP_DERIVED
)
1879 gfc_error ("Initialization of variable at %C is not allowed in "
1880 "a PURE procedure");
1889 if (initializer
!= NULL
&& current_attr
.allocatable
1890 && gfc_current_state () == COMP_DERIVED
)
1892 gfc_error ("Initialization of allocatable component at %C is not "
1898 /* Add the initializer. Note that it is fine if initializer is
1899 NULL here, because we sometimes also need to check if a
1900 declaration *must* have an initialization expression. */
1901 if (gfc_current_state () != COMP_DERIVED
)
1902 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
1905 if (current_ts
.type
== BT_DERIVED
1906 && !current_attr
.pointer
&& !initializer
)
1907 initializer
= gfc_default_initializer (¤t_ts
);
1908 t
= build_struct (name
, cl
, &initializer
, &as
);
1911 m
= (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
1914 /* Free stuff up and return. */
1915 gfc_free_expr (initializer
);
1916 gfc_free_array_spec (as
);
1922 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1923 This assumes that the byte size is equal to the kind number for
1924 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1927 gfc_match_old_kind_spec (gfc_typespec
*ts
)
1932 if (gfc_match_char ('*') != MATCH_YES
)
1935 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
1939 original_kind
= ts
->kind
;
1941 /* Massage the kind numbers for complex types. */
1942 if (ts
->type
== BT_COMPLEX
)
1946 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1947 gfc_basic_typename (ts
->type
), original_kind
);
1953 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
1955 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1956 gfc_basic_typename (ts
->type
), original_kind
);
1960 if (gfc_notify_std (GFC_STD_GNU
, "Nonstandard type declaration %s*%d at %C",
1961 gfc_basic_typename (ts
->type
), original_kind
) == FAILURE
)
1968 /* Match a kind specification. Since kinds are generally optional, we
1969 usually return MATCH_NO if something goes wrong. If a "kind="
1970 string is found, then we know we have an error. */
1973 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
1985 where
= loc
= gfc_current_locus
;
1990 if (gfc_match_char ('(') == MATCH_NO
)
1993 /* Also gobbles optional text. */
1994 if (gfc_match (" kind = ") == MATCH_YES
)
1997 loc
= gfc_current_locus
;
2000 n
= gfc_match_init_expr (&e
);
2004 if (gfc_matching_function
)
2006 /* The function kind expression might include use associated or
2007 imported parameters and try again after the specification
2009 if (gfc_match_char (')') != MATCH_YES
)
2011 gfc_error ("Missing right parenthesis at %C");
2017 gfc_undo_symbols ();
2022 /* ....or else, the match is real. */
2024 gfc_error ("Expected initialization expression at %C");
2032 gfc_error ("Expected scalar initialization expression at %C");
2037 msg
= gfc_extract_int (e
, &ts
->kind
);
2046 /* Before throwing away the expression, let's see if we had a
2047 C interoperable kind (and store the fact). */
2048 if (e
->ts
.is_c_interop
== 1)
2050 /* Mark this as c interoperable if being declared with one
2051 of the named constants from iso_c_binding. */
2052 ts
->is_c_interop
= e
->ts
.is_iso_c
;
2053 ts
->f90_type
= e
->ts
.f90_type
;
2059 /* Ignore errors to this point, if we've gotten here. This means
2060 we ignore the m=MATCH_ERROR from above. */
2061 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2063 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
2064 gfc_basic_typename (ts
->type
));
2065 gfc_current_locus
= where
;
2069 /* Warn if, e.g., c_int is used for a REAL variable, but not
2070 if, e.g., c_double is used for COMPLEX as the standard
2071 explicitly says that the kind type parameter for complex and real
2072 variable is the same, i.e. c_float == c_float_complex. */
2073 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2074 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2075 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2076 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2077 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2078 gfc_basic_typename (ts
->type
));
2080 gfc_gobble_whitespace ();
2081 if ((c
= gfc_next_ascii_char ()) != ')'
2082 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2084 if (ts
->type
== BT_CHARACTER
)
2085 gfc_error ("Missing right parenthesis or comma at %C");
2087 gfc_error ("Missing right parenthesis at %C");
2091 /* All tests passed. */
2094 if(m
== MATCH_ERROR
)
2095 gfc_current_locus
= where
;
2097 /* Return what we know from the test(s). */
2102 gfc_current_locus
= where
;
2108 match_char_kind (int * kind
, int * is_iso_c
)
2117 where
= gfc_current_locus
;
2119 n
= gfc_match_init_expr (&e
);
2121 if (n
!= MATCH_YES
&& gfc_matching_function
)
2123 /* The expression might include use-associated or imported
2124 parameters and try again after the specification
2127 gfc_undo_symbols ();
2132 gfc_error ("Expected initialization expression at %C");
2138 gfc_error ("Expected scalar initialization expression at %C");
2143 msg
= gfc_extract_int (e
, kind
);
2144 *is_iso_c
= e
->ts
.is_iso_c
;
2154 /* Ignore errors to this point, if we've gotten here. This means
2155 we ignore the m=MATCH_ERROR from above. */
2156 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2158 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2162 /* All tests passed. */
2165 if (m
== MATCH_ERROR
)
2166 gfc_current_locus
= where
;
2168 /* Return what we know from the test(s). */
2173 gfc_current_locus
= where
;
2178 /* Match the various kind/length specifications in a CHARACTER
2179 declaration. We don't return MATCH_NO. */
2182 gfc_match_char_spec (gfc_typespec
*ts
)
2184 int kind
, seen_length
, is_iso_c
;
2194 /* Try the old-style specification first. */
2195 old_char_selector
= 0;
2197 m
= match_char_length (&len
);
2201 old_char_selector
= 1;
2206 m
= gfc_match_char ('(');
2209 m
= MATCH_YES
; /* Character without length is a single char. */
2213 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2214 if (gfc_match (" kind =") == MATCH_YES
)
2216 m
= match_char_kind (&kind
, &is_iso_c
);
2218 if (m
== MATCH_ERROR
)
2223 if (gfc_match (" , len =") == MATCH_NO
)
2226 m
= char_len_param_value (&len
);
2229 if (m
== MATCH_ERROR
)
2236 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2237 if (gfc_match (" len =") == MATCH_YES
)
2239 m
= char_len_param_value (&len
);
2242 if (m
== MATCH_ERROR
)
2246 if (gfc_match_char (')') == MATCH_YES
)
2249 if (gfc_match (" , kind =") != MATCH_YES
)
2252 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2258 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2259 m
= char_len_param_value (&len
);
2262 if (m
== MATCH_ERROR
)
2266 m
= gfc_match_char (')');
2270 if (gfc_match_char (',') != MATCH_YES
)
2273 gfc_match (" kind ="); /* Gobble optional text. */
2275 m
= match_char_kind (&kind
, &is_iso_c
);
2276 if (m
== MATCH_ERROR
)
2282 /* Require a right-paren at this point. */
2283 m
= gfc_match_char (')');
2288 gfc_error ("Syntax error in CHARACTER declaration at %C");
2290 gfc_free_expr (len
);
2294 /* Deal with character functions after USE and IMPORT statements. */
2295 if (gfc_matching_function
)
2297 gfc_free_expr (len
);
2298 gfc_undo_symbols ();
2304 gfc_free_expr (len
);
2308 /* Do some final massaging of the length values. */
2309 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2311 if (seen_length
== 0)
2312 cl
->length
= gfc_int_expr (1);
2317 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2319 /* We have to know if it was a c interoperable kind so we can
2320 do accurate type checking of bind(c) procs, etc. */
2322 /* Mark this as c interoperable if being declared with one
2323 of the named constants from iso_c_binding. */
2324 ts
->is_c_interop
= is_iso_c
;
2325 else if (len
!= NULL
)
2326 /* Here, we might have parsed something such as: character(c_char)
2327 In this case, the parsing code above grabs the c_char when
2328 looking for the length (line 1690, roughly). it's the last
2329 testcase for parsing the kind params of a character variable.
2330 However, it's not actually the length. this seems like it
2332 To see if the user used a C interop kind, test the expr
2333 of the so called length, and see if it's C interoperable. */
2334 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2340 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2341 structure to the matched specification. This is necessary for FUNCTION and
2342 IMPLICIT statements.
2344 If implicit_flag is nonzero, then we don't check for the optional
2345 kind specification. Not doing so is needed for matching an IMPLICIT
2346 statement correctly. */
2349 gfc_match_decl_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2351 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2355 bool seen_deferred_kind
;
2357 /* A belt and braces check that the typespec is correctly being treated
2358 as a deferred characteristic association. */
2359 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2360 && (gfc_current_block ()->result
->ts
.kind
== -1)
2361 && (ts
->kind
== -1);
2363 if (seen_deferred_kind
)
2366 /* Clear the current binding label, in case one is given. */
2367 curr_binding_label
[0] = '\0';
2369 if (gfc_match (" byte") == MATCH_YES
)
2371 if (gfc_notify_std (GFC_STD_GNU
, "Extension: BYTE type at %C")
2375 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2377 gfc_error ("BYTE type used at %C "
2378 "is not available on the target machine");
2382 ts
->type
= BT_INTEGER
;
2387 if (gfc_match (" integer") == MATCH_YES
)
2389 ts
->type
= BT_INTEGER
;
2390 ts
->kind
= gfc_default_integer_kind
;
2394 if (gfc_match (" character") == MATCH_YES
)
2396 ts
->type
= BT_CHARACTER
;
2397 if (implicit_flag
== 0)
2398 return gfc_match_char_spec (ts
);
2403 if (gfc_match (" real") == MATCH_YES
)
2406 ts
->kind
= gfc_default_real_kind
;
2410 if (gfc_match (" double precision") == MATCH_YES
)
2413 ts
->kind
= gfc_default_double_kind
;
2417 if (gfc_match (" complex") == MATCH_YES
)
2419 ts
->type
= BT_COMPLEX
;
2420 ts
->kind
= gfc_default_complex_kind
;
2424 if (gfc_match (" double complex") == MATCH_YES
)
2426 if (gfc_notify_std (GFC_STD_GNU
, "DOUBLE COMPLEX at %C does not "
2427 "conform to the Fortran 95 standard") == FAILURE
)
2430 ts
->type
= BT_COMPLEX
;
2431 ts
->kind
= gfc_default_double_kind
;
2435 if (gfc_match (" logical") == MATCH_YES
)
2437 ts
->type
= BT_LOGICAL
;
2438 ts
->kind
= gfc_default_logical_kind
;
2442 m
= gfc_match (" type ( %n )", name
);
2444 ts
->type
= BT_DERIVED
;
2447 m
= gfc_match (" class ( %n )", name
);
2450 ts
->type
= BT_CLASS
;
2452 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: CLASS statement at %C")
2457 /* Defer association of the derived type until the end of the
2458 specification block. However, if the derived type can be
2459 found, add it to the typespec. */
2460 if (gfc_matching_function
)
2462 ts
->u
.derived
= NULL
;
2463 if (gfc_current_state () != COMP_INTERFACE
2464 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2465 ts
->u
.derived
= sym
;
2469 /* Search for the name but allow the components to be defined later. If
2470 type = -1, this typespec has been seen in a function declaration but
2471 the type could not be accessed at that point. */
2473 if (ts
->kind
!= -1 && gfc_get_ha_symbol (name
, &sym
))
2475 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2478 else if (ts
->kind
== -1)
2480 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2481 || gfc_current_ns
->has_import_set
;
2482 if (gfc_find_symbol (name
, NULL
, iface
, &sym
))
2484 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2493 if (sym
->attr
.flavor
!= FL_DERIVED
2494 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
2497 gfc_set_sym_referenced (sym
);
2498 ts
->u
.derived
= sym
;
2503 /* For all types except double, derived and character, look for an
2504 optional kind specifier. MATCH_NO is actually OK at this point. */
2505 if (implicit_flag
== 1)
2508 if (gfc_current_form
== FORM_FREE
)
2510 c
= gfc_peek_ascii_char ();
2511 if (!gfc_is_whitespace (c
) && c
!= '*' && c
!= '('
2512 && c
!= ':' && c
!= ',')
2516 m
= gfc_match_kind_spec (ts
, false);
2517 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2518 m
= gfc_match_old_kind_spec (ts
);
2520 /* Defer association of the KIND expression of function results
2521 until after USE and IMPORT statements. */
2522 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2523 || gfc_matching_function
)
2527 m
= MATCH_YES
; /* No kind specifier found. */
2533 /* Match an IMPLICIT NONE statement. Actually, this statement is
2534 already matched in parse.c, or we would not end up here in the
2535 first place. So the only thing we need to check, is if there is
2536 trailing garbage. If not, the match is successful. */
2539 gfc_match_implicit_none (void)
2541 return (gfc_match_eos () == MATCH_YES
) ? MATCH_YES
: MATCH_NO
;
2545 /* Match the letter range(s) of an IMPLICIT statement. */
2548 match_implicit_range (void)
2554 cur_loc
= gfc_current_locus
;
2556 gfc_gobble_whitespace ();
2557 c
= gfc_next_ascii_char ();
2560 gfc_error ("Missing character range in IMPLICIT at %C");
2567 gfc_gobble_whitespace ();
2568 c1
= gfc_next_ascii_char ();
2572 gfc_gobble_whitespace ();
2573 c
= gfc_next_ascii_char ();
2578 inner
= 0; /* Fall through. */
2585 gfc_gobble_whitespace ();
2586 c2
= gfc_next_ascii_char ();
2590 gfc_gobble_whitespace ();
2591 c
= gfc_next_ascii_char ();
2593 if ((c
!= ',') && (c
!= ')'))
2606 gfc_error ("Letters must be in alphabetic order in "
2607 "IMPLICIT statement at %C");
2611 /* See if we can add the newly matched range to the pending
2612 implicits from this IMPLICIT statement. We do not check for
2613 conflicts with whatever earlier IMPLICIT statements may have
2614 set. This is done when we've successfully finished matching
2616 if (gfc_add_new_implicit_range (c1
, c2
) != SUCCESS
)
2623 gfc_syntax_error (ST_IMPLICIT
);
2625 gfc_current_locus
= cur_loc
;
2630 /* Match an IMPLICIT statement, storing the types for
2631 gfc_set_implicit() if the statement is accepted by the parser.
2632 There is a strange looking, but legal syntactic construction
2633 possible. It looks like:
2635 IMPLICIT INTEGER (a-b) (c-d)
2637 This is legal if "a-b" is a constant expression that happens to
2638 equal one of the legal kinds for integers. The real problem
2639 happens with an implicit specification that looks like:
2641 IMPLICIT INTEGER (a-b)
2643 In this case, a typespec matcher that is "greedy" (as most of the
2644 matchers are) gobbles the character range as a kindspec, leaving
2645 nothing left. We therefore have to go a bit more slowly in the
2646 matching process by inhibiting the kindspec checking during
2647 typespec matching and checking for a kind later. */
2650 gfc_match_implicit (void)
2659 /* We don't allow empty implicit statements. */
2660 if (gfc_match_eos () == MATCH_YES
)
2662 gfc_error ("Empty IMPLICIT statement at %C");
2668 /* First cleanup. */
2669 gfc_clear_new_implicit ();
2671 /* A basic type is mandatory here. */
2672 m
= gfc_match_decl_type_spec (&ts
, 1);
2673 if (m
== MATCH_ERROR
)
2678 cur_loc
= gfc_current_locus
;
2679 m
= match_implicit_range ();
2683 /* We may have <TYPE> (<RANGE>). */
2684 gfc_gobble_whitespace ();
2685 c
= gfc_next_ascii_char ();
2686 if ((c
== '\n') || (c
== ','))
2688 /* Check for CHARACTER with no length parameter. */
2689 if (ts
.type
== BT_CHARACTER
&& !ts
.u
.cl
)
2691 ts
.kind
= gfc_default_character_kind
;
2692 ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2693 ts
.u
.cl
->length
= gfc_int_expr (1);
2696 /* Record the Successful match. */
2697 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2702 gfc_current_locus
= cur_loc
;
2705 /* Discard the (incorrectly) matched range. */
2706 gfc_clear_new_implicit ();
2708 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2709 if (ts
.type
== BT_CHARACTER
)
2710 m
= gfc_match_char_spec (&ts
);
2713 m
= gfc_match_kind_spec (&ts
, false);
2716 m
= gfc_match_old_kind_spec (&ts
);
2717 if (m
== MATCH_ERROR
)
2723 if (m
== MATCH_ERROR
)
2726 m
= match_implicit_range ();
2727 if (m
== MATCH_ERROR
)
2732 gfc_gobble_whitespace ();
2733 c
= gfc_next_ascii_char ();
2734 if ((c
!= '\n') && (c
!= ','))
2737 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2745 gfc_syntax_error (ST_IMPLICIT
);
2753 gfc_match_import (void)
2755 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2760 if (gfc_current_ns
->proc_name
== NULL
2761 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
2763 gfc_error ("IMPORT statement at %C only permitted in "
2764 "an INTERFACE body");
2768 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IMPORT statement at %C")
2772 if (gfc_match_eos () == MATCH_YES
)
2774 /* All host variables should be imported. */
2775 gfc_current_ns
->has_import_set
= 1;
2779 if (gfc_match (" ::") == MATCH_YES
)
2781 if (gfc_match_eos () == MATCH_YES
)
2783 gfc_error ("Expecting list of named entities at %C");
2790 m
= gfc_match (" %n", name
);
2794 if (gfc_current_ns
->parent
!= NULL
2795 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
2797 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2800 else if (gfc_current_ns
->proc_name
->ns
->parent
!= NULL
2801 && gfc_find_symbol (name
,
2802 gfc_current_ns
->proc_name
->ns
->parent
,
2805 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2811 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2812 "at %C - does not exist.", name
);
2816 if (gfc_find_symtree (gfc_current_ns
->sym_root
,name
))
2818 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2823 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, sym
->name
);
2826 sym
->attr
.imported
= 1;
2838 if (gfc_match_eos () == MATCH_YES
)
2840 if (gfc_match_char (',') != MATCH_YES
)
2847 gfc_error ("Syntax error in IMPORT statement at %C");
2852 /* A minimal implementation of gfc_match without whitespace, escape
2853 characters or variable arguments. Returns true if the next
2854 characters match the TARGET template exactly. */
2857 match_string_p (const char *target
)
2861 for (p
= target
; *p
; p
++)
2862 if ((char) gfc_next_ascii_char () != *p
)
2867 /* Matches an attribute specification including array specs. If
2868 successful, leaves the variables current_attr and current_as
2869 holding the specification. Also sets the colon_seen variable for
2870 later use by matchers associated with initializations.
2872 This subroutine is a little tricky in the sense that we don't know
2873 if we really have an attr-spec until we hit the double colon.
2874 Until that time, we can only return MATCH_NO. This forces us to
2875 check for duplicate specification at this level. */
2878 match_attr_spec (void)
2880 /* Modifiers that can exist in a type statement. */
2882 { GFC_DECL_BEGIN
= 0,
2883 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
2884 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
2885 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
2886 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
2887 DECL_IS_BIND_C
, DECL_CODIMENSION
, DECL_ASYNCHRONOUS
, DECL_NONE
,
2888 GFC_DECL_END
/* Sentinel */
2892 /* GFC_DECL_END is the sentinel, index starts at 0. */
2893 #define NUM_DECL GFC_DECL_END
2895 locus start
, seen_at
[NUM_DECL
];
2902 gfc_clear_attr (¤t_attr
);
2903 start
= gfc_current_locus
;
2908 /* See if we get all of the keywords up to the final double colon. */
2909 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
2917 gfc_gobble_whitespace ();
2919 ch
= gfc_next_ascii_char ();
2922 /* This is the successful exit condition for the loop. */
2923 if (gfc_next_ascii_char () == ':')
2928 gfc_gobble_whitespace ();
2929 switch (gfc_peek_ascii_char ())
2932 gfc_next_ascii_char ();
2933 switch (gfc_next_ascii_char ())
2936 if (match_string_p ("locatable"))
2938 /* Matched "allocatable". */
2939 d
= DECL_ALLOCATABLE
;
2944 if (match_string_p ("ynchronous"))
2946 /* Matched "asynchronous". */
2947 d
= DECL_ASYNCHRONOUS
;
2953 /* Try and match the bind(c). */
2954 m
= gfc_match_bind_c (NULL
, true);
2957 else if (m
== MATCH_ERROR
)
2962 if (match_string_p ("codimension"))
2963 d
= DECL_CODIMENSION
;
2967 if (match_string_p ("dimension"))
2972 if (match_string_p ("external"))
2977 if (match_string_p ("int"))
2979 ch
= gfc_next_ascii_char ();
2982 if (match_string_p ("nt"))
2984 /* Matched "intent". */
2985 /* TODO: Call match_intent_spec from here. */
2986 if (gfc_match (" ( in out )") == MATCH_YES
)
2988 else if (gfc_match (" ( in )") == MATCH_YES
)
2990 else if (gfc_match (" ( out )") == MATCH_YES
)
2996 if (match_string_p ("insic"))
2998 /* Matched "intrinsic". */
3006 if (match_string_p ("optional"))
3011 gfc_next_ascii_char ();
3012 switch (gfc_next_ascii_char ())
3015 if (match_string_p ("rameter"))
3017 /* Matched "parameter". */
3023 if (match_string_p ("inter"))
3025 /* Matched "pointer". */
3031 ch
= gfc_next_ascii_char ();
3034 if (match_string_p ("vate"))
3036 /* Matched "private". */
3042 if (match_string_p ("tected"))
3044 /* Matched "protected". */
3051 if (match_string_p ("blic"))
3053 /* Matched "public". */
3061 if (match_string_p ("save"))
3066 if (match_string_p ("target"))
3071 gfc_next_ascii_char ();
3072 ch
= gfc_next_ascii_char ();
3075 if (match_string_p ("lue"))
3077 /* Matched "value". */
3083 if (match_string_p ("latile"))
3085 /* Matched "volatile". */
3093 /* No double colon and no recognizable decl_type, so assume that
3094 we've been looking at something else the whole time. */
3101 /* Check to make sure any parens are paired up correctly. */
3102 if (gfc_match_parens () == MATCH_ERROR
)
3109 seen_at
[d
] = gfc_current_locus
;
3111 if (d
== DECL_DIMENSION
|| d
== DECL_CODIMENSION
)
3113 gfc_array_spec
*as
= NULL
;
3115 m
= gfc_match_array_spec (&as
, d
== DECL_DIMENSION
,
3116 d
== DECL_CODIMENSION
);
3118 if (current_as
== NULL
)
3120 else if (m
== MATCH_YES
)
3122 merge_array_spec (as
, current_as
, false);
3128 if (d
== DECL_CODIMENSION
)
3129 gfc_error ("Missing codimension specification at %C");
3131 gfc_error ("Missing dimension specification at %C");
3135 if (m
== MATCH_ERROR
)
3140 /* Since we've seen a double colon, we have to be looking at an
3141 attr-spec. This means that we can now issue errors. */
3142 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3147 case DECL_ALLOCATABLE
:
3148 attr
= "ALLOCATABLE";
3150 case DECL_ASYNCHRONOUS
:
3151 attr
= "ASYNCHRONOUS";
3153 case DECL_CODIMENSION
:
3154 attr
= "CODIMENSION";
3156 case DECL_DIMENSION
:
3163 attr
= "INTENT (IN)";
3166 attr
= "INTENT (OUT)";
3169 attr
= "INTENT (IN OUT)";
3171 case DECL_INTRINSIC
:
3177 case DECL_PARAMETER
:
3183 case DECL_PROTECTED
:
3198 case DECL_IS_BIND_C
:
3208 attr
= NULL
; /* This shouldn't happen. */
3211 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3216 /* Now that we've dealt with duplicate attributes, add the attributes
3217 to the current attribute. */
3218 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3223 if (gfc_current_state () == COMP_DERIVED
3224 && d
!= DECL_DIMENSION
&& d
!= DECL_CODIMENSION
3225 && d
!= DECL_POINTER
&& d
!= DECL_PRIVATE
3226 && d
!= DECL_PUBLIC
&& d
!= DECL_NONE
)
3228 if (d
== DECL_ALLOCATABLE
)
3230 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ALLOCATABLE "
3231 "attribute at %C in a TYPE definition")
3240 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3247 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3248 && gfc_current_state () != COMP_MODULE
)
3250 if (d
== DECL_PRIVATE
)
3254 if (gfc_current_state () == COMP_DERIVED
3255 && gfc_state_stack
->previous
3256 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3258 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Attribute %s "
3259 "at %L in a TYPE definition", attr
,
3269 gfc_error ("%s attribute at %L is not allowed outside of the "
3270 "specification part of a module", attr
, &seen_at
[d
]);
3278 case DECL_ALLOCATABLE
:
3279 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3282 case DECL_ASYNCHRONOUS
:
3283 if (gfc_notify_std (GFC_STD_F2003
,
3284 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3288 t
= gfc_add_asynchronous (¤t_attr
, NULL
, &seen_at
[d
]);
3291 case DECL_CODIMENSION
:
3292 t
= gfc_add_codimension (¤t_attr
, NULL
, &seen_at
[d
]);
3295 case DECL_DIMENSION
:
3296 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3300 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3304 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3308 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3312 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3315 case DECL_INTRINSIC
:
3316 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3320 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3323 case DECL_PARAMETER
:
3324 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3328 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3331 case DECL_PROTECTED
:
3332 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3334 gfc_error ("PROTECTED at %C only allowed in specification "
3335 "part of a module");
3340 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED "
3345 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3349 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3354 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3359 t
= gfc_add_save (¤t_attr
, NULL
, &seen_at
[d
]);
3363 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3366 case DECL_IS_BIND_C
:
3367 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3371 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE attribute "
3376 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3380 if (gfc_notify_std (GFC_STD_F2003
,
3381 "Fortran 2003: VOLATILE attribute at %C")
3385 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3389 gfc_internal_error ("match_attr_spec(): Bad attribute");
3403 gfc_current_locus
= start
;
3404 gfc_free_array_spec (current_as
);
3410 /* Set the binding label, dest_label, either with the binding label
3411 stored in the given gfc_typespec, ts, or if none was provided, it
3412 will be the symbol name in all lower case, as required by the draft
3413 (J3/04-007, section 15.4.1). If a binding label was given and
3414 there is more than one argument (num_idents), it is an error. */
3417 set_binding_label (char *dest_label
, const char *sym_name
, int num_idents
)
3419 if (num_idents
> 1 && has_name_equals
)
3421 gfc_error ("Multiple identifiers provided with "
3422 "single NAME= specifier at %C");
3426 if (curr_binding_label
[0] != '\0')
3428 /* Binding label given; store in temp holder til have sym. */
3429 strcpy (dest_label
, curr_binding_label
);
3433 /* No binding label given, and the NAME= specifier did not exist,
3434 which means there was no NAME="". */
3435 if (sym_name
!= NULL
&& has_name_equals
== 0)
3436 strcpy (dest_label
, sym_name
);
3443 /* Set the status of the given common block as being BIND(C) or not,
3444 depending on the given parameter, is_bind_c. */
3447 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3449 com_block
->is_bind_c
= is_bind_c
;
3454 /* Verify that the given gfc_typespec is for a C interoperable type. */
3457 verify_c_interop (gfc_typespec
*ts
)
3459 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
!= NULL
)
3460 return (ts
->u
.derived
->ts
.is_c_interop
? SUCCESS
: FAILURE
);
3461 else if (ts
->is_c_interop
!= 1)
3468 /* Verify that the variables of a given common block, which has been
3469 defined with the attribute specifier bind(c), to be of a C
3470 interoperable type. Errors will be reported here, if
3474 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3476 gfc_symbol
*curr_sym
= NULL
;
3477 gfc_try retval
= SUCCESS
;
3479 curr_sym
= com_block
->head
;
3481 /* Make sure we have at least one symbol. */
3482 if (curr_sym
== NULL
)
3485 /* Here we know we have a symbol, so we'll execute this loop
3489 /* The second to last param, 1, says this is in a common block. */
3490 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
3491 curr_sym
= curr_sym
->common_next
;
3492 } while (curr_sym
!= NULL
);
3498 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3499 an appropriate error message is reported. */
3502 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
3503 int is_in_common
, gfc_common_head
*com_block
)
3505 bool bind_c_function
= false;
3506 gfc_try retval
= SUCCESS
;
3508 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
3509 bind_c_function
= true;
3511 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
3513 tmp_sym
= tmp_sym
->result
;
3514 /* Make sure it wasn't an implicitly typed result. */
3515 if (tmp_sym
->attr
.implicit_type
)
3517 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3518 "%L may not be C interoperable", tmp_sym
->name
,
3519 &tmp_sym
->declared_at
);
3520 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
3521 /* Mark it as C interoperable to prevent duplicate warnings. */
3522 tmp_sym
->ts
.is_c_interop
= 1;
3523 tmp_sym
->attr
.is_c_interop
= 1;
3527 /* Here, we know we have the bind(c) attribute, so if we have
3528 enough type info, then verify that it's a C interop kind.
3529 The info could be in the symbol already, or possibly still in
3530 the given ts (current_ts), so look in both. */
3531 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
3533 if (verify_c_interop (&(tmp_sym
->ts
)) != SUCCESS
)
3535 /* See if we're dealing with a sym in a common block or not. */
3536 if (is_in_common
== 1)
3538 gfc_warning ("Variable '%s' in common block '%s' at %L "
3539 "may not be a C interoperable "
3540 "kind though common block '%s' is BIND(C)",
3541 tmp_sym
->name
, com_block
->name
,
3542 &(tmp_sym
->declared_at
), com_block
->name
);
3546 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
3547 gfc_error ("Type declaration '%s' at %L is not C "
3548 "interoperable but it is BIND(C)",
3549 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3551 gfc_warning ("Variable '%s' at %L "
3552 "may not be a C interoperable "
3553 "kind but it is bind(c)",
3554 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3558 /* Variables declared w/in a common block can't be bind(c)
3559 since there's no way for C to see these variables, so there's
3560 semantically no reason for the attribute. */
3561 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
3563 gfc_error ("Variable '%s' in common block '%s' at "
3564 "%L cannot be declared with BIND(C) "
3565 "since it is not a global",
3566 tmp_sym
->name
, com_block
->name
,
3567 &(tmp_sym
->declared_at
));
3571 /* Scalar variables that are bind(c) can not have the pointer
3572 or allocatable attributes. */
3573 if (tmp_sym
->attr
.is_bind_c
== 1)
3575 if (tmp_sym
->attr
.pointer
== 1)
3577 gfc_error ("Variable '%s' at %L cannot have both the "
3578 "POINTER and BIND(C) attributes",
3579 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3583 if (tmp_sym
->attr
.allocatable
== 1)
3585 gfc_error ("Variable '%s' at %L cannot have both the "
3586 "ALLOCATABLE and BIND(C) attributes",
3587 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3593 /* If it is a BIND(C) function, make sure the return value is a
3594 scalar value. The previous tests in this function made sure
3595 the type is interoperable. */
3596 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
3597 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3598 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
3600 /* BIND(C) functions can not return a character string. */
3601 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
3602 if (tmp_sym
->ts
.u
.cl
== NULL
|| tmp_sym
->ts
.u
.cl
->length
== NULL
3603 || tmp_sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
3604 || mpz_cmp_si (tmp_sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
3605 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3606 "be a character string", tmp_sym
->name
,
3607 &(tmp_sym
->declared_at
));
3610 /* See if the symbol has been marked as private. If it has, make sure
3611 there is no binding label and warn the user if there is one. */
3612 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
3613 && tmp_sym
->binding_label
[0] != '\0')
3614 /* Use gfc_warning_now because we won't say that the symbol fails
3615 just because of this. */
3616 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3617 "given the binding label '%s'", tmp_sym
->name
,
3618 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
3624 /* Set the appropriate fields for a symbol that's been declared as
3625 BIND(C) (the is_bind_c flag and the binding label), and verify that
3626 the type is C interoperable. Errors are reported by the functions
3627 used to set/test these fields. */
3630 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
3632 gfc_try retval
= SUCCESS
;
3634 /* TODO: Do we need to make sure the vars aren't marked private? */
3636 /* Set the is_bind_c bit in symbol_attribute. */
3637 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
3639 if (set_binding_label (tmp_sym
->binding_label
, tmp_sym
->name
,
3640 num_idents
) != SUCCESS
)
3647 /* Set the fields marking the given common block as BIND(C), including
3648 a binding label, and report any errors encountered. */
3651 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
3653 gfc_try retval
= SUCCESS
;
3655 /* destLabel, common name, typespec (which may have binding label). */
3656 if (set_binding_label (com_block
->binding_label
, com_block
->name
, num_idents
)
3660 /* Set the given common block (com_block) to being bind(c) (1). */
3661 set_com_block_bind_c (com_block
, 1);
3667 /* Retrieve the list of one or more identifiers that the given bind(c)
3668 attribute applies to. */
3671 get_bind_c_idents (void)
3673 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3675 gfc_symbol
*tmp_sym
= NULL
;
3677 gfc_common_head
*com_block
= NULL
;
3679 if (gfc_match_name (name
) == MATCH_YES
)
3681 found_id
= MATCH_YES
;
3682 gfc_get_ha_symbol (name
, &tmp_sym
);
3684 else if (match_common_name (name
) == MATCH_YES
)
3686 found_id
= MATCH_YES
;
3687 com_block
= gfc_get_common (name
, 0);
3691 gfc_error ("Need either entity or common block name for "
3692 "attribute specification statement at %C");
3696 /* Save the current identifier and look for more. */
3699 /* Increment the number of identifiers found for this spec stmt. */
3702 /* Make sure we have a sym or com block, and verify that it can
3703 be bind(c). Set the appropriate field(s) and look for more
3705 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
3707 if (tmp_sym
!= NULL
)
3709 if (set_verify_bind_c_sym (tmp_sym
, num_idents
)
3715 if (set_verify_bind_c_com_block(com_block
, num_idents
)
3720 /* Look to see if we have another identifier. */
3722 if (gfc_match_eos () == MATCH_YES
)
3723 found_id
= MATCH_NO
;
3724 else if (gfc_match_char (',') != MATCH_YES
)
3725 found_id
= MATCH_NO
;
3726 else if (gfc_match_name (name
) == MATCH_YES
)
3728 found_id
= MATCH_YES
;
3729 gfc_get_ha_symbol (name
, &tmp_sym
);
3731 else if (match_common_name (name
) == MATCH_YES
)
3733 found_id
= MATCH_YES
;
3734 com_block
= gfc_get_common (name
, 0);
3738 gfc_error ("Missing entity or common block name for "
3739 "attribute specification statement at %C");
3745 gfc_internal_error ("Missing symbol");
3747 } while (found_id
== MATCH_YES
);
3749 /* if we get here we were successful */
3754 /* Try and match a BIND(C) attribute specification statement. */
3757 gfc_match_bind_c_stmt (void)
3759 match found_match
= MATCH_NO
;
3764 /* This may not be necessary. */
3766 /* Clear the temporary binding label holder. */
3767 curr_binding_label
[0] = '\0';
3769 /* Look for the bind(c). */
3770 found_match
= gfc_match_bind_c (NULL
, true);
3772 if (found_match
== MATCH_YES
)
3774 /* Look for the :: now, but it is not required. */
3777 /* Get the identifier(s) that needs to be updated. This may need to
3778 change to hand the flag(s) for the attr specified so all identifiers
3779 found can have all appropriate parts updated (assuming that the same
3780 spec stmt can have multiple attrs, such as both bind(c) and
3782 if (get_bind_c_idents () != SUCCESS
)
3783 /* Error message should have printed already. */
3791 /* Match a data declaration statement. */
3794 gfc_match_data_decl (void)
3800 num_idents_on_line
= 0;
3802 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
3806 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
3807 && gfc_current_state () != COMP_DERIVED
)
3809 sym
= gfc_use_derived (current_ts
.u
.derived
);
3817 current_ts
.u
.derived
= sym
;
3820 m
= match_attr_spec ();
3821 if (m
== MATCH_ERROR
)
3827 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
3828 && current_ts
.u
.derived
->components
== NULL
3829 && !current_ts
.u
.derived
->attr
.zero_comp
)
3832 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
3835 gfc_find_symbol (current_ts
.u
.derived
->name
,
3836 current_ts
.u
.derived
->ns
->parent
, 1, &sym
);
3838 /* Any symbol that we find had better be a type definition
3839 which has its components defined. */
3840 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
3841 && (current_ts
.u
.derived
->components
!= NULL
3842 || current_ts
.u
.derived
->attr
.zero_comp
))
3845 /* Now we have an error, which we signal, and then fix up
3846 because the knock-on is plain and simple confusing. */
3847 gfc_error_now ("Derived type at %C has not been previously defined "
3848 "and so cannot appear in a derived type definition");
3849 current_attr
.pointer
= 1;
3854 /* If we have an old-style character declaration, and no new-style
3855 attribute specifications, then there a comma is optional between
3856 the type specification and the variable list. */
3857 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
3858 gfc_match_char (',');
3860 /* Give the types/attributes to symbols that follow. Give the element
3861 a number so that repeat character length expressions can be copied. */
3865 num_idents_on_line
++;
3866 m
= variable_decl (elem
++);
3867 if (m
== MATCH_ERROR
)
3872 if (gfc_match_eos () == MATCH_YES
)
3874 if (gfc_match_char (',') != MATCH_YES
)
3878 if (gfc_error_flag_test () == 0)
3879 gfc_error ("Syntax error in data declaration at %C");
3882 gfc_free_data_all (gfc_current_ns
);
3885 gfc_free_array_spec (current_as
);
3891 /* Match a prefix associated with a function or subroutine
3892 declaration. If the typespec pointer is nonnull, then a typespec
3893 can be matched. Note that if nothing matches, MATCH_YES is
3894 returned (the null string was matched). */
3897 gfc_match_prefix (gfc_typespec
*ts
)
3901 gfc_clear_attr (¤t_attr
);
3904 gcc_assert (!gfc_matching_prefix
);
3905 gfc_matching_prefix
= true;
3908 if (!seen_type
&& ts
!= NULL
3909 && gfc_match_decl_type_spec (ts
, 0) == MATCH_YES
3910 && gfc_match_space () == MATCH_YES
)
3917 if (gfc_match ("elemental% ") == MATCH_YES
)
3919 if (gfc_add_elemental (¤t_attr
, NULL
) == FAILURE
)
3925 if (gfc_match ("pure% ") == MATCH_YES
)
3927 if (gfc_add_pure (¤t_attr
, NULL
) == FAILURE
)
3933 if (gfc_match ("recursive% ") == MATCH_YES
)
3935 if (gfc_add_recursive (¤t_attr
, NULL
) == FAILURE
)
3941 /* At this point, the next item is not a prefix. */
3942 gcc_assert (gfc_matching_prefix
);
3943 gfc_matching_prefix
= false;
3947 gcc_assert (gfc_matching_prefix
);
3948 gfc_matching_prefix
= false;
3953 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3956 copy_prefix (symbol_attribute
*dest
, locus
*where
)
3958 if (current_attr
.pure
&& gfc_add_pure (dest
, where
) == FAILURE
)
3961 if (current_attr
.elemental
&& gfc_add_elemental (dest
, where
) == FAILURE
)
3964 if (current_attr
.recursive
&& gfc_add_recursive (dest
, where
) == FAILURE
)
3971 /* Match a formal argument list. */
3974 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
3976 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
3977 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3983 if (gfc_match_char ('(') != MATCH_YES
)
3990 if (gfc_match_char (')') == MATCH_YES
)
3995 if (gfc_match_char ('*') == MATCH_YES
)
3999 m
= gfc_match_name (name
);
4003 if (gfc_get_symbol (name
, NULL
, &sym
))
4007 p
= gfc_get_formal_arglist ();
4019 /* We don't add the VARIABLE flavor because the name could be a
4020 dummy procedure. We don't apply these attributes to formal
4021 arguments of statement functions. */
4022 if (sym
!= NULL
&& !st_flag
4023 && (gfc_add_dummy (&sym
->attr
, sym
->name
, NULL
) == FAILURE
4024 || gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
))
4030 /* The name of a program unit can be in a different namespace,
4031 so check for it explicitly. After the statement is accepted,
4032 the name is checked for especially in gfc_get_symbol(). */
4033 if (gfc_new_block
!= NULL
&& sym
!= NULL
4034 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
4036 gfc_error ("Name '%s' at %C is the name of the procedure",
4042 if (gfc_match_char (')') == MATCH_YES
)
4045 m
= gfc_match_char (',');
4048 gfc_error ("Unexpected junk in formal argument list at %C");
4054 /* Check for duplicate symbols in the formal argument list. */
4057 for (p
= head
; p
->next
; p
= p
->next
)
4062 for (q
= p
->next
; q
; q
= q
->next
)
4063 if (p
->sym
== q
->sym
)
4065 gfc_error ("Duplicate symbol '%s' in formal argument list "
4066 "at %C", p
->sym
->name
);
4074 if (gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
)
4084 gfc_free_formal_arglist (head
);
4089 /* Match a RESULT specification following a function declaration or
4090 ENTRY statement. Also matches the end-of-statement. */
4093 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
4095 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4099 if (gfc_match (" result (") != MATCH_YES
)
4102 m
= gfc_match_name (name
);
4106 /* Get the right paren, and that's it because there could be the
4107 bind(c) attribute after the result clause. */
4108 if (gfc_match_char(')') != MATCH_YES
)
4110 /* TODO: should report the missing right paren here. */
4114 if (strcmp (function
->name
, name
) == 0)
4116 gfc_error ("RESULT variable at %C must be different than function name");
4120 if (gfc_get_symbol (name
, NULL
, &r
))
4123 if (gfc_add_result (&r
->attr
, r
->name
, NULL
) == FAILURE
)
4132 /* Match a function suffix, which could be a combination of a result
4133 clause and BIND(C), either one, or neither. The draft does not
4134 require them to come in a specific order. */
4137 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4139 match is_bind_c
; /* Found bind(c). */
4140 match is_result
; /* Found result clause. */
4141 match found_match
; /* Status of whether we've found a good match. */
4142 char peek_char
; /* Character we're going to peek at. */
4143 bool allow_binding_name
;
4145 /* Initialize to having found nothing. */
4146 found_match
= MATCH_NO
;
4147 is_bind_c
= MATCH_NO
;
4148 is_result
= MATCH_NO
;
4150 /* Get the next char to narrow between result and bind(c). */
4151 gfc_gobble_whitespace ();
4152 peek_char
= gfc_peek_ascii_char ();
4154 /* C binding names are not allowed for internal procedures. */
4155 if (gfc_current_state () == COMP_CONTAINS
4156 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4157 allow_binding_name
= false;
4159 allow_binding_name
= true;
4164 /* Look for result clause. */
4165 is_result
= match_result (sym
, result
);
4166 if (is_result
== MATCH_YES
)
4168 /* Now see if there is a bind(c) after it. */
4169 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4170 /* We've found the result clause and possibly bind(c). */
4171 found_match
= MATCH_YES
;
4174 /* This should only be MATCH_ERROR. */
4175 found_match
= is_result
;
4178 /* Look for bind(c) first. */
4179 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4180 if (is_bind_c
== MATCH_YES
)
4182 /* Now see if a result clause followed it. */
4183 is_result
= match_result (sym
, result
);
4184 found_match
= MATCH_YES
;
4188 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4189 found_match
= MATCH_ERROR
;
4193 gfc_error ("Unexpected junk after function declaration at %C");
4194 found_match
= MATCH_ERROR
;
4198 if (is_bind_c
== MATCH_YES
)
4200 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4201 if (gfc_current_state () == COMP_CONTAINS
4202 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4203 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
4204 "at %L may not be specified for an internal "
4205 "procedure", &gfc_current_locus
)
4209 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1)
4218 /* Procedure pointer return value without RESULT statement:
4219 Add "hidden" result variable named "ppr@". */
4222 add_hidden_procptr_result (gfc_symbol
*sym
)
4226 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4229 /* First usage case: PROCEDURE and EXTERNAL statements. */
4230 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4231 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4232 && sym
->attr
.external
;
4233 /* Second usage case: INTERFACE statements. */
4234 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4235 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4236 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4242 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4246 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4247 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4248 st2
->n
.sym
= stree
->n
.sym
;
4250 sym
->result
= stree
->n
.sym
;
4252 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4253 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4254 sym
->result
->attr
.external
= sym
->attr
.external
;
4255 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4256 sym
->result
->ts
= sym
->ts
;
4257 sym
->attr
.proc_pointer
= 0;
4258 sym
->attr
.pointer
= 0;
4259 sym
->attr
.external
= 0;
4260 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4262 sym
->result
->attr
.pointer
= 0;
4263 sym
->result
->attr
.proc_pointer
= 1;
4266 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4268 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4269 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4270 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4271 && sym
== gfc_current_ns
->proc_name
4272 && sym
== sym
->result
->ns
->proc_name
4273 && strcmp ("ppr@", sym
->result
->name
) == 0)
4275 sym
->result
->attr
.proc_pointer
= 1;
4276 sym
->attr
.pointer
= 0;
4284 /* Match the interface for a PROCEDURE declaration,
4285 including brackets (R1212). */
4288 match_procedure_interface (gfc_symbol
**proc_if
)
4292 locus old_loc
, entry_loc
;
4293 gfc_namespace
*old_ns
= gfc_current_ns
;
4294 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4296 old_loc
= entry_loc
= gfc_current_locus
;
4297 gfc_clear_ts (¤t_ts
);
4299 if (gfc_match (" (") != MATCH_YES
)
4301 gfc_current_locus
= entry_loc
;
4305 /* Get the type spec. for the procedure interface. */
4306 old_loc
= gfc_current_locus
;
4307 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4308 gfc_gobble_whitespace ();
4309 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4312 if (m
== MATCH_ERROR
)
4315 /* Procedure interface is itself a procedure. */
4316 gfc_current_locus
= old_loc
;
4317 m
= gfc_match_name (name
);
4319 /* First look to see if it is already accessible in the current
4320 namespace because it is use associated or contained. */
4322 if (gfc_find_sym_tree (name
, NULL
, 0, &st
))
4325 /* If it is still not found, then try the parent namespace, if it
4326 exists and create the symbol there if it is still not found. */
4327 if (gfc_current_ns
->parent
)
4328 gfc_current_ns
= gfc_current_ns
->parent
;
4329 if (st
== NULL
&& gfc_get_ha_sym_tree (name
, &st
))
4332 gfc_current_ns
= old_ns
;
4333 *proc_if
= st
->n
.sym
;
4335 /* Various interface checks. */
4339 /* Resolve interface if possible. That way, attr.procedure is only set
4340 if it is declared by a later procedure-declaration-stmt, which is
4341 invalid per C1212. */
4342 while ((*proc_if
)->ts
.interface
)
4343 *proc_if
= (*proc_if
)->ts
.interface
;
4345 if ((*proc_if
)->generic
)
4347 gfc_error ("Interface '%s' at %C may not be generic",
4351 if ((*proc_if
)->attr
.proc
== PROC_ST_FUNCTION
)
4353 gfc_error ("Interface '%s' at %C may not be a statement function",
4357 /* Handle intrinsic procedures. */
4358 if (!((*proc_if
)->attr
.external
|| (*proc_if
)->attr
.use_assoc
4359 || (*proc_if
)->attr
.if_source
== IFSRC_IFBODY
)
4360 && (gfc_is_intrinsic ((*proc_if
), 0, gfc_current_locus
)
4361 || gfc_is_intrinsic ((*proc_if
), 1, gfc_current_locus
)))
4362 (*proc_if
)->attr
.intrinsic
= 1;
4363 if ((*proc_if
)->attr
.intrinsic
4364 && !gfc_intrinsic_actual_ok ((*proc_if
)->name
, 0))
4366 gfc_error ("Intrinsic procedure '%s' not allowed "
4367 "in PROCEDURE statement at %C", (*proc_if
)->name
);
4373 if (gfc_match (" )") != MATCH_YES
)
4375 gfc_current_locus
= entry_loc
;
4383 /* Match a PROCEDURE declaration (R1211). */
4386 match_procedure_decl (void)
4389 gfc_symbol
*sym
, *proc_if
= NULL
;
4391 gfc_expr
*initializer
= NULL
;
4393 /* Parse interface (with brackets). */
4394 m
= match_procedure_interface (&proc_if
);
4398 /* Parse attributes (with colons). */
4399 m
= match_attr_spec();
4400 if (m
== MATCH_ERROR
)
4403 /* Get procedure symbols. */
4406 m
= gfc_match_symbol (&sym
, 0);
4409 else if (m
== MATCH_ERROR
)
4412 /* Add current_attr to the symbol attributes. */
4413 if (gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4416 if (sym
->attr
.is_bind_c
)
4418 /* Check for C1218. */
4419 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4421 gfc_error ("BIND(C) attribute at %C requires "
4422 "an interface with BIND(C)");
4425 /* Check for C1217. */
4426 if (has_name_equals
&& sym
->attr
.pointer
)
4428 gfc_error ("BIND(C) procedure with NAME may not have "
4429 "POINTER attribute at %C");
4432 if (has_name_equals
&& sym
->attr
.dummy
)
4434 gfc_error ("Dummy procedure at %C may not have "
4435 "BIND(C) attribute with NAME");
4438 /* Set binding label for BIND(C). */
4439 if (set_binding_label (sym
->binding_label
, sym
->name
, num
) != SUCCESS
)
4443 if (gfc_add_external (&sym
->attr
, NULL
) == FAILURE
)
4446 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4449 if (gfc_add_proc (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4452 /* Set interface. */
4453 if (proc_if
!= NULL
)
4455 if (sym
->ts
.type
!= BT_UNKNOWN
)
4457 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4458 sym
->name
, &gfc_current_locus
,
4459 gfc_basic_typename (sym
->ts
.type
));
4462 sym
->ts
.interface
= proc_if
;
4463 sym
->attr
.untyped
= 1;
4464 sym
->attr
.if_source
= IFSRC_IFBODY
;
4466 else if (current_ts
.type
!= BT_UNKNOWN
)
4468 if (gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4470 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4471 sym
->ts
.interface
->ts
= current_ts
;
4472 sym
->ts
.interface
->attr
.function
= 1;
4473 sym
->attr
.function
= sym
->ts
.interface
->attr
.function
;
4474 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
4477 if (gfc_match (" =>") == MATCH_YES
)
4479 if (!current_attr
.pointer
)
4481 gfc_error ("Initialization at %C isn't for a pointer variable");
4486 m
= gfc_match_null (&initializer
);
4489 gfc_error ("Pointer initialization requires a NULL() at %C");
4493 if (gfc_pure (NULL
))
4495 gfc_error ("Initialization of pointer at %C is not allowed in "
4496 "a PURE procedure");
4503 if (add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
)
4509 gfc_set_sym_referenced (sym
);
4511 if (gfc_match_eos () == MATCH_YES
)
4513 if (gfc_match_char (',') != MATCH_YES
)
4518 gfc_error ("Syntax error in PROCEDURE statement at %C");
4522 /* Free stuff up and return. */
4523 gfc_free_expr (initializer
);
4529 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
4532 /* Match a procedure pointer component declaration (R445). */
4535 match_ppc_decl (void)
4538 gfc_symbol
*proc_if
= NULL
;
4542 gfc_expr
*initializer
= NULL
;
4543 gfc_typebound_proc
* tb
;
4544 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4546 /* Parse interface (with brackets). */
4547 m
= match_procedure_interface (&proc_if
);
4551 /* Parse attributes. */
4552 tb
= XCNEW (gfc_typebound_proc
);
4553 tb
->where
= gfc_current_locus
;
4554 m
= match_binding_attributes (tb
, false, true);
4555 if (m
== MATCH_ERROR
)
4558 gfc_clear_attr (¤t_attr
);
4559 current_attr
.procedure
= 1;
4560 current_attr
.proc_pointer
= 1;
4561 current_attr
.access
= tb
->access
;
4562 current_attr
.flavor
= FL_PROCEDURE
;
4564 /* Match the colons (required). */
4565 if (gfc_match (" ::") != MATCH_YES
)
4567 gfc_error ("Expected '::' after binding-attributes at %C");
4571 /* Check for C450. */
4572 if (!tb
->nopass
&& proc_if
== NULL
)
4574 gfc_error("NOPASS or explicit interface required at %C");
4578 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure pointer "
4579 "component at %C") == FAILURE
)
4582 /* Match PPC names. */
4586 m
= gfc_match_name (name
);
4589 else if (m
== MATCH_ERROR
)
4592 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
4595 /* Add current_attr to the symbol attributes. */
4596 if (gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4599 if (gfc_add_external (&c
->attr
, NULL
) == FAILURE
)
4602 if (gfc_add_proc (&c
->attr
, name
, NULL
) == FAILURE
)
4607 /* Set interface. */
4608 if (proc_if
!= NULL
)
4610 c
->ts
.interface
= proc_if
;
4611 c
->attr
.untyped
= 1;
4612 c
->attr
.if_source
= IFSRC_IFBODY
;
4614 else if (ts
.type
!= BT_UNKNOWN
)
4617 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4618 c
->ts
.interface
->ts
= ts
;
4619 c
->ts
.interface
->attr
.function
= 1;
4620 c
->attr
.function
= c
->ts
.interface
->attr
.function
;
4621 c
->attr
.if_source
= IFSRC_UNKNOWN
;
4624 if (gfc_match (" =>") == MATCH_YES
)
4626 m
= gfc_match_null (&initializer
);
4629 gfc_error ("Pointer initialization requires a NULL() at %C");
4632 if (gfc_pure (NULL
))
4634 gfc_error ("Initialization of pointer at %C is not allowed in "
4635 "a PURE procedure");
4640 gfc_free_expr (initializer
);
4643 c
->initializer
= initializer
;
4646 if (gfc_match_eos () == MATCH_YES
)
4648 if (gfc_match_char (',') != MATCH_YES
)
4653 gfc_error ("Syntax error in procedure pointer component at %C");
4658 /* Match a PROCEDURE declaration inside an interface (R1206). */
4661 match_procedure_in_interface (void)
4665 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4667 if (current_interface
.type
== INTERFACE_NAMELESS
4668 || current_interface
.type
== INTERFACE_ABSTRACT
)
4670 gfc_error ("PROCEDURE at %C must be in a generic interface");
4676 m
= gfc_match_name (name
);
4679 else if (m
== MATCH_ERROR
)
4681 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
4684 if (gfc_add_interface (sym
) == FAILURE
)
4687 if (gfc_match_eos () == MATCH_YES
)
4689 if (gfc_match_char (',') != MATCH_YES
)
4696 gfc_error ("Syntax error in PROCEDURE statement at %C");
4701 /* General matcher for PROCEDURE declarations. */
4703 static match
match_procedure_in_type (void);
4706 gfc_match_procedure (void)
4710 switch (gfc_current_state ())
4715 case COMP_SUBROUTINE
:
4717 m
= match_procedure_decl ();
4719 case COMP_INTERFACE
:
4720 m
= match_procedure_in_interface ();
4723 m
= match_ppc_decl ();
4725 case COMP_DERIVED_CONTAINS
:
4726 m
= match_procedure_in_type ();
4735 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROCEDURE statement at %C")
4743 /* Warn if a matched procedure has the same name as an intrinsic; this is
4744 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4745 parser-state-stack to find out whether we're in a module. */
4748 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
4752 in_module
= (gfc_state_stack
->previous
4753 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
4755 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
4759 /* Match a function declaration. */
4762 gfc_match_function_decl (void)
4764 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4765 gfc_symbol
*sym
, *result
;
4769 match found_match
; /* Status returned by match func. */
4771 if (gfc_current_state () != COMP_NONE
4772 && gfc_current_state () != COMP_INTERFACE
4773 && gfc_current_state () != COMP_CONTAINS
)
4776 gfc_clear_ts (¤t_ts
);
4778 old_loc
= gfc_current_locus
;
4780 m
= gfc_match_prefix (¤t_ts
);
4783 gfc_current_locus
= old_loc
;
4787 if (gfc_match ("function% %n", name
) != MATCH_YES
)
4789 gfc_current_locus
= old_loc
;
4792 if (get_proc_name (name
, &sym
, false))
4795 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4798 gfc_new_block
= sym
;
4800 m
= gfc_match_formal_arglist (sym
, 0, 0);
4803 gfc_error ("Expected formal argument list in function "
4804 "definition at %C");
4808 else if (m
== MATCH_ERROR
)
4813 /* According to the draft, the bind(c) and result clause can
4814 come in either order after the formal_arg_list (i.e., either
4815 can be first, both can exist together or by themselves or neither
4816 one). Therefore, the match_result can't match the end of the
4817 string, and check for the bind(c) or result clause in either order. */
4818 found_match
= gfc_match_eos ();
4820 /* Make sure that it isn't already declared as BIND(C). If it is, it
4821 must have been marked BIND(C) with a BIND(C) attribute and that is
4822 not allowed for procedures. */
4823 if (sym
->attr
.is_bind_c
== 1)
4825 sym
->attr
.is_bind_c
= 0;
4826 if (sym
->old_symbol
!= NULL
)
4827 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4828 "variables or common blocks",
4829 &(sym
->old_symbol
->declared_at
));
4831 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4832 "variables or common blocks", &gfc_current_locus
);
4835 if (found_match
!= MATCH_YES
)
4837 /* If we haven't found the end-of-statement, look for a suffix. */
4838 suffix_match
= gfc_match_suffix (sym
, &result
);
4839 if (suffix_match
== MATCH_YES
)
4840 /* Need to get the eos now. */
4841 found_match
= gfc_match_eos ();
4843 found_match
= suffix_match
;
4846 if(found_match
!= MATCH_YES
)
4850 /* Make changes to the symbol. */
4853 if (gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4856 if (gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
4857 || copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
4860 /* Delay matching the function characteristics until after the
4861 specification block by signalling kind=-1. */
4862 sym
->declared_at
= old_loc
;
4863 if (current_ts
.type
!= BT_UNKNOWN
)
4864 current_ts
.kind
= -1;
4866 current_ts
.kind
= 0;
4870 if (current_ts
.type
!= BT_UNKNOWN
4871 && gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4877 if (current_ts
.type
!= BT_UNKNOWN
4878 && gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
)
4881 sym
->result
= result
;
4884 /* Warn if this procedure has the same name as an intrinsic. */
4885 warn_intrinsic_shadow (sym
, true);
4891 gfc_current_locus
= old_loc
;
4896 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4897 pass the name of the entry, rather than the gfc_current_block name, and
4898 to return false upon finding an existing global entry. */
4901 add_global_entry (const char *name
, int sub
)
4904 enum gfc_symbol_type type
;
4906 s
= gfc_get_gsymbol(name
);
4907 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
4910 || (s
->type
!= GSYM_UNKNOWN
4911 && s
->type
!= type
))
4912 gfc_global_used(s
, NULL
);
4916 s
->where
= gfc_current_locus
;
4918 s
->ns
= gfc_current_ns
;
4925 /* Match an ENTRY statement. */
4928 gfc_match_entry (void)
4933 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4934 gfc_compile_state state
;
4938 bool module_procedure
;
4942 m
= gfc_match_name (name
);
4946 state
= gfc_current_state ();
4947 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
4952 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4955 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4957 case COMP_BLOCK_DATA
:
4958 gfc_error ("ENTRY statement at %C cannot appear within "
4961 case COMP_INTERFACE
:
4962 gfc_error ("ENTRY statement at %C cannot appear within "
4966 gfc_error ("ENTRY statement at %C cannot appear within "
4967 "a DERIVED TYPE block");
4970 gfc_error ("ENTRY statement at %C cannot appear within "
4971 "an IF-THEN block");
4974 gfc_error ("ENTRY statement at %C cannot appear within "
4978 gfc_error ("ENTRY statement at %C cannot appear within "
4982 gfc_error ("ENTRY statement at %C cannot appear within "
4986 gfc_error ("ENTRY statement at %C cannot appear within "
4990 gfc_error ("ENTRY statement at %C cannot appear within "
4991 "a contained subprogram");
4994 gfc_internal_error ("gfc_match_entry(): Bad state");
4999 module_procedure
= gfc_current_ns
->parent
!= NULL
5000 && gfc_current_ns
->parent
->proc_name
5001 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
5004 if (gfc_current_ns
->parent
!= NULL
5005 && gfc_current_ns
->parent
->proc_name
5006 && !module_procedure
)
5008 gfc_error("ENTRY statement at %C cannot appear in a "
5009 "contained procedure");
5013 /* Module function entries need special care in get_proc_name
5014 because previous references within the function will have
5015 created symbols attached to the current namespace. */
5016 if (get_proc_name (name
, &entry
,
5017 gfc_current_ns
->parent
!= NULL
5018 && module_procedure
))
5021 proc
= gfc_current_block ();
5023 /* Make sure that it isn't already declared as BIND(C). If it is, it
5024 must have been marked BIND(C) with a BIND(C) attribute and that is
5025 not allowed for procedures. */
5026 if (entry
->attr
.is_bind_c
== 1)
5028 entry
->attr
.is_bind_c
= 0;
5029 if (entry
->old_symbol
!= NULL
)
5030 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5031 "variables or common blocks",
5032 &(entry
->old_symbol
->declared_at
));
5034 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5035 "variables or common blocks", &gfc_current_locus
);
5038 /* Check what next non-whitespace character is so we can tell if there
5039 is the required parens if we have a BIND(C). */
5040 gfc_gobble_whitespace ();
5041 peek_char
= gfc_peek_ascii_char ();
5043 if (state
== COMP_SUBROUTINE
)
5045 /* An entry in a subroutine. */
5046 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 1))
5049 m
= gfc_match_formal_arglist (entry
, 0, 1);
5053 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5054 never be an internal procedure. */
5055 is_bind_c
= gfc_match_bind_c (entry
, true);
5056 if (is_bind_c
== MATCH_ERROR
)
5058 if (is_bind_c
== MATCH_YES
)
5060 if (peek_char
!= '(')
5062 gfc_error ("Missing required parentheses before BIND(C) at %C");
5065 if (gfc_add_is_bind_c (&(entry
->attr
), entry
->name
, &(entry
->declared_at
), 1)
5070 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5071 || gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5076 /* An entry in a function.
5077 We need to take special care because writing
5082 ENTRY f() RESULT (r)
5084 ENTRY f RESULT (r). */
5085 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 0))
5088 old_loc
= gfc_current_locus
;
5089 if (gfc_match_eos () == MATCH_YES
)
5091 gfc_current_locus
= old_loc
;
5092 /* Match the empty argument list, and add the interface to
5094 m
= gfc_match_formal_arglist (entry
, 0, 1);
5097 m
= gfc_match_formal_arglist (entry
, 0, 0);
5104 if (gfc_match_eos () == MATCH_YES
)
5106 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5107 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5110 entry
->result
= entry
;
5114 m
= gfc_match_suffix (entry
, &result
);
5116 gfc_syntax_error (ST_ENTRY
);
5122 if (gfc_add_result (&result
->attr
, result
->name
, NULL
) == FAILURE
5123 || gfc_add_entry (&entry
->attr
, result
->name
, NULL
) == FAILURE
5124 || gfc_add_function (&entry
->attr
, result
->name
, NULL
)
5127 entry
->result
= result
;
5131 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5132 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5134 entry
->result
= entry
;
5139 if (gfc_match_eos () != MATCH_YES
)
5141 gfc_syntax_error (ST_ENTRY
);
5145 entry
->attr
.recursive
= proc
->attr
.recursive
;
5146 entry
->attr
.elemental
= proc
->attr
.elemental
;
5147 entry
->attr
.pure
= proc
->attr
.pure
;
5149 el
= gfc_get_entry_list ();
5151 el
->next
= gfc_current_ns
->entries
;
5152 gfc_current_ns
->entries
= el
;
5154 el
->id
= el
->next
->id
+ 1;
5158 new_st
.op
= EXEC_ENTRY
;
5159 new_st
.ext
.entry
= el
;
5165 /* Match a subroutine statement, including optional prefixes. */
5168 gfc_match_subroutine (void)
5170 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5175 bool allow_binding_name
;
5177 if (gfc_current_state () != COMP_NONE
5178 && gfc_current_state () != COMP_INTERFACE
5179 && gfc_current_state () != COMP_CONTAINS
)
5182 m
= gfc_match_prefix (NULL
);
5186 m
= gfc_match ("subroutine% %n", name
);
5190 if (get_proc_name (name
, &sym
, false))
5193 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5194 the symbol existed before. */
5195 sym
->declared_at
= gfc_current_locus
;
5197 if (add_hidden_procptr_result (sym
) == SUCCESS
)
5200 gfc_new_block
= sym
;
5202 /* Check what next non-whitespace character is so we can tell if there
5203 is the required parens if we have a BIND(C). */
5204 gfc_gobble_whitespace ();
5205 peek_char
= gfc_peek_ascii_char ();
5207 if (gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
5210 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5213 /* Make sure that it isn't already declared as BIND(C). If it is, it
5214 must have been marked BIND(C) with a BIND(C) attribute and that is
5215 not allowed for procedures. */
5216 if (sym
->attr
.is_bind_c
== 1)
5218 sym
->attr
.is_bind_c
= 0;
5219 if (sym
->old_symbol
!= NULL
)
5220 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5221 "variables or common blocks",
5222 &(sym
->old_symbol
->declared_at
));
5224 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5225 "variables or common blocks", &gfc_current_locus
);
5228 /* C binding names are not allowed for internal procedures. */
5229 if (gfc_current_state () == COMP_CONTAINS
5230 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5231 allow_binding_name
= false;
5233 allow_binding_name
= true;
5235 /* Here, we are just checking if it has the bind(c) attribute, and if
5236 so, then we need to make sure it's all correct. If it doesn't,
5237 we still need to continue matching the rest of the subroutine line. */
5238 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5239 if (is_bind_c
== MATCH_ERROR
)
5241 /* There was an attempt at the bind(c), but it was wrong. An
5242 error message should have been printed w/in the gfc_match_bind_c
5243 so here we'll just return the MATCH_ERROR. */
5247 if (is_bind_c
== MATCH_YES
)
5249 /* The following is allowed in the Fortran 2008 draft. */
5250 if (gfc_current_state () == COMP_CONTAINS
5251 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5252 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
5253 "at %L may not be specified for an internal "
5254 "procedure", &gfc_current_locus
)
5258 if (peek_char
!= '(')
5260 gfc_error ("Missing required parentheses before BIND(C) at %C");
5263 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &(sym
->declared_at
), 1)
5268 if (gfc_match_eos () != MATCH_YES
)
5270 gfc_syntax_error (ST_SUBROUTINE
);
5274 if (copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
5277 /* Warn if it has the same name as an intrinsic. */
5278 warn_intrinsic_shadow (sym
, false);
5284 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5285 given, and set the binding label in either the given symbol (if not
5286 NULL), or in the current_ts. The symbol may be NULL because we may
5287 encounter the BIND(C) before the declaration itself. Return
5288 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5289 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5290 or MATCH_YES if the specifier was correct and the binding label and
5291 bind(c) fields were set correctly for the given symbol or the
5292 current_ts. If allow_binding_name is false, no binding name may be
5296 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5298 /* binding label, if exists */
5299 char binding_label
[GFC_MAX_SYMBOL_LEN
+ 1];
5303 /* Initialize the flag that specifies whether we encountered a NAME=
5304 specifier or not. */
5305 has_name_equals
= 0;
5307 /* Init the first char to nil so we can catch if we don't have
5308 the label (name attr) or the symbol name yet. */
5309 binding_label
[0] = '\0';
5311 /* This much we have to be able to match, in this order, if
5312 there is a bind(c) label. */
5313 if (gfc_match (" bind ( c ") != MATCH_YES
)
5316 /* Now see if there is a binding label, or if we've reached the
5317 end of the bind(c) attribute without one. */
5318 if (gfc_match_char (',') == MATCH_YES
)
5320 if (gfc_match (" name = ") != MATCH_YES
)
5322 gfc_error ("Syntax error in NAME= specifier for binding label "
5324 /* should give an error message here */
5328 has_name_equals
= 1;
5330 /* Get the opening quote. */
5331 double_quote
= MATCH_YES
;
5332 single_quote
= MATCH_YES
;
5333 double_quote
= gfc_match_char ('"');
5334 if (double_quote
!= MATCH_YES
)
5335 single_quote
= gfc_match_char ('\'');
5336 if (double_quote
!= MATCH_YES
&& single_quote
!= MATCH_YES
)
5338 gfc_error ("Syntax error in NAME= specifier for binding label "
5343 /* Grab the binding label, using functions that will not lower
5344 case the names automatically. */
5345 if (gfc_match_name_C (binding_label
) != MATCH_YES
)
5348 /* Get the closing quotation. */
5349 if (double_quote
== MATCH_YES
)
5351 if (gfc_match_char ('"') != MATCH_YES
)
5353 gfc_error ("Missing closing quote '\"' for binding label at %C");
5354 /* User started string with '"' so looked to match it. */
5360 if (gfc_match_char ('\'') != MATCH_YES
)
5362 gfc_error ("Missing closing quote '\'' for binding label at %C");
5363 /* User started string with "'" char. */
5369 /* Get the required right paren. */
5370 if (gfc_match_char (')') != MATCH_YES
)
5372 gfc_error ("Missing closing paren for binding label at %C");
5376 if (has_name_equals
&& !allow_binding_name
)
5378 gfc_error ("No binding name is allowed in BIND(C) at %C");
5382 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5384 gfc_error ("For dummy procedure %s, no binding name is "
5385 "allowed in BIND(C) at %C", sym
->name
);
5390 /* Save the binding label to the symbol. If sym is null, we're
5391 probably matching the typespec attributes of a declaration and
5392 haven't gotten the name yet, and therefore, no symbol yet. */
5393 if (binding_label
[0] != '\0')
5397 strcpy (sym
->binding_label
, binding_label
);
5400 strcpy (curr_binding_label
, binding_label
);
5402 else if (allow_binding_name
)
5404 /* No binding label, but if symbol isn't null, we
5405 can set the label for it here.
5406 If name="" or allow_binding_name is false, no C binding name is
5408 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
5409 strncpy (sym
->binding_label
, sym
->name
, strlen (sym
->name
) + 1);
5412 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
5413 && current_interface
.type
== INTERFACE_ABSTRACT
)
5415 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5423 /* Return nonzero if we're currently compiling a contained procedure. */
5426 contained_procedure (void)
5428 gfc_state_data
*s
= gfc_state_stack
;
5430 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
5431 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
5437 /* Set the kind of each enumerator. The kind is selected such that it is
5438 interoperable with the corresponding C enumeration type, making
5439 sure that -fshort-enums is honored. */
5444 enumerator_history
*current_history
= NULL
;
5448 if (max_enum
== NULL
|| enum_history
== NULL
)
5451 if (!flag_short_enums
)
5457 kind
= gfc_integer_kinds
[i
++].kind
;
5459 while (kind
< gfc_c_int_kind
5460 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
5463 current_history
= enum_history
;
5464 while (current_history
!= NULL
)
5466 current_history
->sym
->ts
.kind
= kind
;
5467 current_history
= current_history
->next
;
5472 /* Match any of the various end-block statements. Returns the type of
5473 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5474 and END BLOCK statements cannot be replaced by a single END statement. */
5477 gfc_match_end (gfc_statement
*st
)
5479 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5480 gfc_compile_state state
;
5482 const char *block_name
;
5487 old_loc
= gfc_current_locus
;
5488 if (gfc_match ("end") != MATCH_YES
)
5491 state
= gfc_current_state ();
5492 block_name
= gfc_current_block () == NULL
5493 ? NULL
: gfc_current_block ()->name
;
5495 if (state
== COMP_BLOCK
&& !strcmp (block_name
, "block@"))
5498 if (state
== COMP_CONTAINS
|| state
== COMP_DERIVED_CONTAINS
)
5500 state
= gfc_state_stack
->previous
->state
;
5501 block_name
= gfc_state_stack
->previous
->sym
== NULL
5502 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
5509 *st
= ST_END_PROGRAM
;
5510 target
= " program";
5514 case COMP_SUBROUTINE
:
5515 *st
= ST_END_SUBROUTINE
;
5516 target
= " subroutine";
5517 eos_ok
= !contained_procedure ();
5521 *st
= ST_END_FUNCTION
;
5522 target
= " function";
5523 eos_ok
= !contained_procedure ();
5526 case COMP_BLOCK_DATA
:
5527 *st
= ST_END_BLOCK_DATA
;
5528 target
= " block data";
5533 *st
= ST_END_MODULE
;
5538 case COMP_INTERFACE
:
5539 *st
= ST_END_INTERFACE
;
5540 target
= " interface";
5545 case COMP_DERIVED_CONTAINS
:
5570 *st
= ST_END_CRITICAL
;
5571 target
= " critical";
5576 case COMP_SELECT_TYPE
:
5577 *st
= ST_END_SELECT
;
5583 *st
= ST_END_FORALL
;
5598 last_initializer
= NULL
;
5600 gfc_free_enum_history ();
5604 gfc_error ("Unexpected END statement at %C");
5608 if (gfc_match_eos () == MATCH_YES
)
5612 /* We would have required END [something]. */
5613 gfc_error ("%s statement expected at %L",
5614 gfc_ascii_statement (*st
), &old_loc
);
5621 /* Verify that we've got the sort of end-block that we're expecting. */
5622 if (gfc_match (target
) != MATCH_YES
)
5624 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st
));
5628 /* If we're at the end, make sure a block name wasn't required. */
5629 if (gfc_match_eos () == MATCH_YES
)
5632 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
5633 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
&& *st
!= ST_END_BLOCK
5634 && *st
!= ST_END_CRITICAL
)
5640 gfc_error ("Expected block name of '%s' in %s statement at %C",
5641 block_name
, gfc_ascii_statement (*st
));
5646 /* END INTERFACE has a special handler for its several possible endings. */
5647 if (*st
== ST_END_INTERFACE
)
5648 return gfc_match_end_interface ();
5650 /* We haven't hit the end of statement, so what is left must be an
5652 m
= gfc_match_space ();
5654 m
= gfc_match_name (name
);
5657 gfc_error ("Expected terminating name at %C");
5661 if (block_name
== NULL
)
5664 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
5666 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
5667 gfc_ascii_statement (*st
));
5670 /* Procedure pointer as function result. */
5671 else if (strcmp (block_name
, "ppr@") == 0
5672 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
5674 gfc_error ("Expected label '%s' for %s statement at %C",
5675 gfc_current_block ()->ns
->proc_name
->name
,
5676 gfc_ascii_statement (*st
));
5680 if (gfc_match_eos () == MATCH_YES
)
5684 gfc_syntax_error (*st
);
5687 gfc_current_locus
= old_loc
;
5693 /***************** Attribute declaration statements ****************/
5695 /* Set the attribute of a single variable. */
5700 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5708 m
= gfc_match_name (name
);
5712 if (find_special (name
, &sym
, false))
5715 var_locus
= gfc_current_locus
;
5717 /* Deal with possible array specification for certain attributes. */
5718 if (current_attr
.dimension
5719 || current_attr
.codimension
5720 || current_attr
.allocatable
5721 || current_attr
.pointer
5722 || current_attr
.target
)
5724 m
= gfc_match_array_spec (&as
, !current_attr
.codimension
,
5725 !current_attr
.dimension
5726 && !current_attr
.pointer
5727 && !current_attr
.target
);
5728 if (m
== MATCH_ERROR
)
5731 if (current_attr
.dimension
&& m
== MATCH_NO
)
5733 gfc_error ("Missing array specification at %L in DIMENSION "
5734 "statement", &var_locus
);
5739 if (current_attr
.dimension
&& sym
->value
)
5741 gfc_error ("Dimensions specified for %s at %L after its "
5742 "initialisation", sym
->name
, &var_locus
);
5747 if (current_attr
.codimension
&& m
== MATCH_NO
)
5749 gfc_error ("Missing array specification at %L in CODIMENSION "
5750 "statement", &var_locus
);
5755 if ((current_attr
.allocatable
|| current_attr
.pointer
)
5756 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
5758 gfc_error ("Array specification must be deferred at %L", &var_locus
);
5764 /* Update symbol table. DIMENSION attribute is set in
5765 gfc_set_array_spec(). For CLASS variables, this must be applied
5766 to the first component, or '$data' field. */
5767 if (sym
->ts
.type
== BT_CLASS
&& sym
->ts
.u
.derived
)
5769 gfc_component
*comp
;
5770 comp
= gfc_find_component (sym
->ts
.u
.derived
, "$data", true, true);
5771 if (comp
== NULL
|| gfc_copy_attr (&comp
->attr
, ¤t_attr
,
5772 &var_locus
) == FAILURE
)
5777 sym
->attr
.class_ok
= (sym
->attr
.class_ok
5778 || current_attr
.allocatable
5779 || current_attr
.pointer
);
5783 if (current_attr
.dimension
== 0 && current_attr
.codimension
== 0
5784 && gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
) == FAILURE
)
5791 if (gfc_set_array_spec (sym
, as
, &var_locus
) == FAILURE
)
5797 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
5799 /* Fix the array spec. */
5800 m
= gfc_mod_pointee_as (sym
->as
);
5801 if (m
== MATCH_ERROR
)
5805 if (gfc_add_attribute (&sym
->attr
, &var_locus
) == FAILURE
)
5811 if ((current_attr
.external
|| current_attr
.intrinsic
)
5812 && sym
->attr
.flavor
!= FL_PROCEDURE
5813 && gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
) == FAILURE
)
5819 add_hidden_procptr_result (sym
);
5824 gfc_free_array_spec (as
);
5829 /* Generic attribute declaration subroutine. Used for attributes that
5830 just have a list of names. */
5837 /* Gobble the optional double colon, by simply ignoring the result
5847 if (gfc_match_eos () == MATCH_YES
)
5853 if (gfc_match_char (',') != MATCH_YES
)
5855 gfc_error ("Unexpected character in variable list at %C");
5865 /* This routine matches Cray Pointer declarations of the form:
5866 pointer ( <pointer>, <pointee> )
5868 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5869 The pointer, if already declared, should be an integer. Otherwise, we
5870 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5871 be either a scalar, or an array declaration. No space is allocated for
5872 the pointee. For the statement
5873 pointer (ipt, ar(10))
5874 any subsequent uses of ar will be translated (in C-notation) as
5875 ar(i) => ((<type> *) ipt)(i)
5876 After gimplification, pointee variable will disappear in the code. */
5879 cray_pointer_decl (void)
5882 gfc_array_spec
*as
= NULL
;
5883 gfc_symbol
*cptr
; /* Pointer symbol. */
5884 gfc_symbol
*cpte
; /* Pointee symbol. */
5890 if (gfc_match_char ('(') != MATCH_YES
)
5892 gfc_error ("Expected '(' at %C");
5896 /* Match pointer. */
5897 var_locus
= gfc_current_locus
;
5898 gfc_clear_attr (¤t_attr
);
5899 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
5900 current_ts
.type
= BT_INTEGER
;
5901 current_ts
.kind
= gfc_index_integer_kind
;
5903 m
= gfc_match_symbol (&cptr
, 0);
5906 gfc_error ("Expected variable name at %C");
5910 if (gfc_add_cray_pointer (&cptr
->attr
, &var_locus
) == FAILURE
)
5913 gfc_set_sym_referenced (cptr
);
5915 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
5917 cptr
->ts
.type
= BT_INTEGER
;
5918 cptr
->ts
.kind
= gfc_index_integer_kind
;
5920 else if (cptr
->ts
.type
!= BT_INTEGER
)
5922 gfc_error ("Cray pointer at %C must be an integer");
5925 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
5926 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5927 " memory addresses require %d bytes",
5928 cptr
->ts
.kind
, gfc_index_integer_kind
);
5930 if (gfc_match_char (',') != MATCH_YES
)
5932 gfc_error ("Expected \",\" at %C");
5936 /* Match Pointee. */
5937 var_locus
= gfc_current_locus
;
5938 gfc_clear_attr (¤t_attr
);
5939 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
5940 current_ts
.type
= BT_UNKNOWN
;
5941 current_ts
.kind
= 0;
5943 m
= gfc_match_symbol (&cpte
, 0);
5946 gfc_error ("Expected variable name at %C");
5950 /* Check for an optional array spec. */
5951 m
= gfc_match_array_spec (&as
, true, false);
5952 if (m
== MATCH_ERROR
)
5954 gfc_free_array_spec (as
);
5957 else if (m
== MATCH_NO
)
5959 gfc_free_array_spec (as
);
5963 if (gfc_add_cray_pointee (&cpte
->attr
, &var_locus
) == FAILURE
)
5966 gfc_set_sym_referenced (cpte
);
5968 if (cpte
->as
== NULL
)
5970 if (gfc_set_array_spec (cpte
, as
, &var_locus
) == FAILURE
)
5971 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5973 else if (as
!= NULL
)
5975 gfc_error ("Duplicate array spec for Cray pointee at %C");
5976 gfc_free_array_spec (as
);
5982 if (cpte
->as
!= NULL
)
5984 /* Fix array spec. */
5985 m
= gfc_mod_pointee_as (cpte
->as
);
5986 if (m
== MATCH_ERROR
)
5990 /* Point the Pointee at the Pointer. */
5991 cpte
->cp_pointer
= cptr
;
5993 if (gfc_match_char (')') != MATCH_YES
)
5995 gfc_error ("Expected \")\" at %C");
5998 m
= gfc_match_char (',');
6000 done
= true; /* Stop searching for more declarations. */
6004 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
6005 || gfc_match_eos () != MATCH_YES
)
6007 gfc_error ("Expected \",\" or end of statement at %C");
6015 gfc_match_external (void)
6018 gfc_clear_attr (¤t_attr
);
6019 current_attr
.external
= 1;
6021 return attr_decl ();
6026 gfc_match_intent (void)
6030 /* This is not allowed within a BLOCK construct! */
6031 if (gfc_current_state () == COMP_BLOCK
)
6033 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6037 intent
= match_intent_spec ();
6038 if (intent
== INTENT_UNKNOWN
)
6041 gfc_clear_attr (¤t_attr
);
6042 current_attr
.intent
= intent
;
6044 return attr_decl ();
6049 gfc_match_intrinsic (void)
6052 gfc_clear_attr (¤t_attr
);
6053 current_attr
.intrinsic
= 1;
6055 return attr_decl ();
6060 gfc_match_optional (void)
6062 /* This is not allowed within a BLOCK construct! */
6063 if (gfc_current_state () == COMP_BLOCK
)
6065 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6069 gfc_clear_attr (¤t_attr
);
6070 current_attr
.optional
= 1;
6072 return attr_decl ();
6077 gfc_match_pointer (void)
6079 gfc_gobble_whitespace ();
6080 if (gfc_peek_ascii_char () == '(')
6082 if (!gfc_option
.flag_cray_pointer
)
6084 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6088 return cray_pointer_decl ();
6092 gfc_clear_attr (¤t_attr
);
6093 current_attr
.pointer
= 1;
6095 return attr_decl ();
6101 gfc_match_allocatable (void)
6103 gfc_clear_attr (¤t_attr
);
6104 current_attr
.allocatable
= 1;
6106 return attr_decl ();
6111 gfc_match_codimension (void)
6113 gfc_clear_attr (¤t_attr
);
6114 current_attr
.codimension
= 1;
6116 return attr_decl ();
6121 gfc_match_dimension (void)
6123 gfc_clear_attr (¤t_attr
);
6124 current_attr
.dimension
= 1;
6126 return attr_decl ();
6131 gfc_match_target (void)
6133 gfc_clear_attr (¤t_attr
);
6134 current_attr
.target
= 1;
6136 return attr_decl ();
6140 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6144 access_attr_decl (gfc_statement st
)
6146 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6147 interface_type type
;
6150 gfc_intrinsic_op op
;
6153 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6158 m
= gfc_match_generic_spec (&type
, name
, &op
);
6161 if (m
== MATCH_ERROR
)
6166 case INTERFACE_NAMELESS
:
6167 case INTERFACE_ABSTRACT
:
6170 case INTERFACE_GENERIC
:
6171 if (gfc_get_symbol (name
, NULL
, &sym
))
6174 if (gfc_add_access (&sym
->attr
, (st
== ST_PUBLIC
)
6175 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
6176 sym
->name
, NULL
) == FAILURE
)
6181 case INTERFACE_INTRINSIC_OP
:
6182 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
6184 gfc_current_ns
->operator_access
[op
] =
6185 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6189 gfc_error ("Access specification of the %s operator at %C has "
6190 "already been specified", gfc_op2string (op
));
6196 case INTERFACE_USER_OP
:
6197 uop
= gfc_get_uop (name
);
6199 if (uop
->access
== ACCESS_UNKNOWN
)
6201 uop
->access
= (st
== ST_PUBLIC
)
6202 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6206 gfc_error ("Access specification of the .%s. operator at %C "
6207 "has already been specified", sym
->name
);
6214 if (gfc_match_char (',') == MATCH_NO
)
6218 if (gfc_match_eos () != MATCH_YES
)
6223 gfc_syntax_error (st
);
6231 gfc_match_protected (void)
6236 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6238 gfc_error ("PROTECTED at %C only allowed in specification "
6239 "part of a module");
6244 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED statement at %C")
6248 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6253 if (gfc_match_eos () == MATCH_YES
)
6258 m
= gfc_match_symbol (&sym
, 0);
6262 if (gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6275 if (gfc_match_eos () == MATCH_YES
)
6277 if (gfc_match_char (',') != MATCH_YES
)
6284 gfc_error ("Syntax error in PROTECTED statement at %C");
6289 /* The PRIVATE statement is a bit weird in that it can be an attribute
6290 declaration, but also works as a standalone statement inside of a
6291 type declaration or a module. */
6294 gfc_match_private (gfc_statement
*st
)
6297 if (gfc_match ("private") != MATCH_YES
)
6300 if (gfc_current_state () != COMP_MODULE
6301 && !(gfc_current_state () == COMP_DERIVED
6302 && gfc_state_stack
->previous
6303 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
6304 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6305 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
6306 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
6308 gfc_error ("PRIVATE statement at %C is only allowed in the "
6309 "specification part of a module");
6313 if (gfc_current_state () == COMP_DERIVED
)
6315 if (gfc_match_eos () == MATCH_YES
)
6321 gfc_syntax_error (ST_PRIVATE
);
6325 if (gfc_match_eos () == MATCH_YES
)
6332 return access_attr_decl (ST_PRIVATE
);
6337 gfc_match_public (gfc_statement
*st
)
6340 if (gfc_match ("public") != MATCH_YES
)
6343 if (gfc_current_state () != COMP_MODULE
)
6345 gfc_error ("PUBLIC statement at %C is only allowed in the "
6346 "specification part of a module");
6350 if (gfc_match_eos () == MATCH_YES
)
6357 return access_attr_decl (ST_PUBLIC
);
6361 /* Workhorse for gfc_match_parameter. */
6371 m
= gfc_match_symbol (&sym
, 0);
6373 gfc_error ("Expected variable name at %C in PARAMETER statement");
6378 if (gfc_match_char ('=') == MATCH_NO
)
6380 gfc_error ("Expected = sign in PARAMETER statement at %C");
6384 m
= gfc_match_init_expr (&init
);
6386 gfc_error ("Expected expression at %C in PARAMETER statement");
6390 if (sym
->ts
.type
== BT_UNKNOWN
6391 && gfc_set_default_type (sym
, 1, NULL
) == FAILURE
)
6397 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
6398 || gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
) == FAILURE
)
6406 gfc_error ("Initializing already initialized variable at %C");
6411 t
= add_init_expr_to_sym (sym
->name
, &init
, &gfc_current_locus
);
6412 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
6415 gfc_free_expr (init
);
6420 /* Match a parameter statement, with the weird syntax that these have. */
6423 gfc_match_parameter (void)
6427 if (gfc_match_char ('(') == MATCH_NO
)
6436 if (gfc_match (" )%t") == MATCH_YES
)
6439 if (gfc_match_char (',') != MATCH_YES
)
6441 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6451 /* Save statements have a special syntax. */
6454 gfc_match_save (void)
6456 char n
[GFC_MAX_SYMBOL_LEN
+1];
6461 if (gfc_match_eos () == MATCH_YES
)
6463 if (gfc_current_ns
->seen_save
)
6465 if (gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
6466 "follows previous SAVE statement")
6471 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
6475 if (gfc_current_ns
->save_all
)
6477 if (gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
6478 "blanket SAVE statement")
6487 m
= gfc_match_symbol (&sym
, 0);
6491 if (gfc_add_save (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6503 m
= gfc_match (" / %n /", &n
);
6504 if (m
== MATCH_ERROR
)
6509 c
= gfc_get_common (n
, 0);
6512 gfc_current_ns
->seen_save
= 1;
6515 if (gfc_match_eos () == MATCH_YES
)
6517 if (gfc_match_char (',') != MATCH_YES
)
6524 gfc_error ("Syntax error in SAVE statement at %C");
6530 gfc_match_value (void)
6535 /* This is not allowed within a BLOCK construct! */
6536 if (gfc_current_state () == COMP_BLOCK
)
6538 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6542 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE statement at %C")
6546 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6551 if (gfc_match_eos () == MATCH_YES
)
6556 m
= gfc_match_symbol (&sym
, 0);
6560 if (gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6573 if (gfc_match_eos () == MATCH_YES
)
6575 if (gfc_match_char (',') != MATCH_YES
)
6582 gfc_error ("Syntax error in VALUE statement at %C");
6588 gfc_match_volatile (void)
6593 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VOLATILE statement at %C")
6597 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6602 if (gfc_match_eos () == MATCH_YES
)
6607 /* VOLATILE is special because it can be added to host-associated
6608 symbols locally. Except for coarrays. */
6609 m
= gfc_match_symbol (&sym
, 1);
6613 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
6614 for variable in a BLOCK which is defined outside of the BLOCK. */
6615 if (sym
->ns
!= gfc_current_ns
&& sym
->attr
.codimension
)
6617 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
6618 "%C, which is use-/host-associated", sym
->name
);
6621 if (gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6634 if (gfc_match_eos () == MATCH_YES
)
6636 if (gfc_match_char (',') != MATCH_YES
)
6643 gfc_error ("Syntax error in VOLATILE statement at %C");
6649 gfc_match_asynchronous (void)
6654 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ASYNCHRONOUS statement at %C")
6658 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6663 if (gfc_match_eos () == MATCH_YES
)
6668 /* ASYNCHRONOUS is special because it can be added to host-associated
6670 m
= gfc_match_symbol (&sym
, 1);
6674 if (gfc_add_asynchronous (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6687 if (gfc_match_eos () == MATCH_YES
)
6689 if (gfc_match_char (',') != MATCH_YES
)
6696 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6701 /* Match a module procedure statement. Note that we have to modify
6702 symbols in the parent's namespace because the current one was there
6703 to receive symbols that are in an interface's formal argument list. */
6706 gfc_match_modproc (void)
6708 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6711 gfc_namespace
*module_ns
;
6712 gfc_interface
*old_interface_head
, *interface
;
6714 if (gfc_state_stack
->state
!= COMP_INTERFACE
6715 || gfc_state_stack
->previous
== NULL
6716 || current_interface
.type
== INTERFACE_NAMELESS
6717 || current_interface
.type
== INTERFACE_ABSTRACT
)
6719 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6724 module_ns
= gfc_current_ns
->parent
;
6725 for (; module_ns
; module_ns
= module_ns
->parent
)
6726 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
6727 || module_ns
->proc_name
->attr
.flavor
== FL_PROGRAM
6728 || (module_ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
6729 && !module_ns
->proc_name
->attr
.contained
))
6732 if (module_ns
== NULL
)
6735 /* Store the current state of the interface. We will need it if we
6736 end up with a syntax error and need to recover. */
6737 old_interface_head
= gfc_current_interface_head ();
6741 locus old_locus
= gfc_current_locus
;
6744 m
= gfc_match_name (name
);
6750 /* Check for syntax error before starting to add symbols to the
6751 current namespace. */
6752 if (gfc_match_eos () == MATCH_YES
)
6754 if (!last
&& gfc_match_char (',') != MATCH_YES
)
6757 /* Now we're sure the syntax is valid, we process this item
6759 if (gfc_get_symbol (name
, module_ns
, &sym
))
6762 if (sym
->attr
.intrinsic
)
6764 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6765 "PROCEDURE", &old_locus
);
6769 if (sym
->attr
.proc
!= PROC_MODULE
6770 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
6771 sym
->name
, NULL
) == FAILURE
)
6774 if (gfc_add_interface (sym
) == FAILURE
)
6777 sym
->attr
.mod_proc
= 1;
6778 sym
->declared_at
= old_locus
;
6787 /* Restore the previous state of the interface. */
6788 interface
= gfc_current_interface_head ();
6789 gfc_set_current_interface_head (old_interface_head
);
6791 /* Free the new interfaces. */
6792 while (interface
!= old_interface_head
)
6794 gfc_interface
*i
= interface
->next
;
6795 gfc_free (interface
);
6799 /* And issue a syntax error. */
6800 gfc_syntax_error (ST_MODULE_PROC
);
6805 /* Check a derived type that is being extended. */
6807 check_extended_derived_type (char *name
)
6809 gfc_symbol
*extended
;
6811 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
6813 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6819 gfc_error ("No such symbol in TYPE definition at %C");
6823 if (extended
->attr
.flavor
!= FL_DERIVED
)
6825 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6826 "derived type", name
);
6830 if (extended
->attr
.is_bind_c
)
6832 gfc_error ("'%s' cannot be extended at %C because it "
6833 "is BIND(C)", extended
->name
);
6837 if (extended
->attr
.sequence
)
6839 gfc_error ("'%s' cannot be extended at %C because it "
6840 "is a SEQUENCE type", extended
->name
);
6848 /* Match the optional attribute specifiers for a type declaration.
6849 Return MATCH_ERROR if an error is encountered in one of the handled
6850 attributes (public, private, bind(c)), MATCH_NO if what's found is
6851 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6852 checking on attribute conflicts needs to be done. */
6855 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
6857 /* See if the derived type is marked as private. */
6858 if (gfc_match (" , private") == MATCH_YES
)
6860 if (gfc_current_state () != COMP_MODULE
)
6862 gfc_error ("Derived type at %C can only be PRIVATE in the "
6863 "specification part of a module");
6867 if (gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
) == FAILURE
)
6870 else if (gfc_match (" , public") == MATCH_YES
)
6872 if (gfc_current_state () != COMP_MODULE
)
6874 gfc_error ("Derived type at %C can only be PUBLIC in the "
6875 "specification part of a module");
6879 if (gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
) == FAILURE
)
6882 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
6884 /* If the type is defined to be bind(c) it then needs to make
6885 sure that all fields are interoperable. This will
6886 need to be a semantic check on the finished derived type.
6887 See 15.2.3 (lines 9-12) of F2003 draft. */
6888 if (gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0) != SUCCESS
)
6891 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6893 else if (gfc_match (" , abstract") == MATCH_YES
)
6895 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ABSTRACT type at %C")
6899 if (gfc_add_abstract (attr
, &gfc_current_locus
) == FAILURE
)
6902 else if (name
&& gfc_match(" , extends ( %n )", name
) == MATCH_YES
)
6904 if (gfc_add_extension (attr
, &gfc_current_locus
) == FAILURE
)
6910 /* If we get here, something matched. */
6915 /* Assign a hash value for a derived type. The algorithm is that of
6916 SDBM. The hashed string is '[module_name #] derived_name'. */
6918 hash_value (gfc_symbol
*sym
)
6920 unsigned int hash
= 0;
6924 /* Hash of the module or procedure name. */
6925 if (sym
->module
!= NULL
)
6927 else if (sym
->ns
&& sym
->ns
->proc_name
6928 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
6929 c
= sym
->ns
->proc_name
->name
;
6936 for (i
= 0; i
< len
; i
++, c
++)
6937 hash
= (hash
<< 6) + (hash
<< 16) - hash
+ (*c
);
6939 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
6940 hash
= (hash
<< 6) + (hash
<< 16) - hash
+ '#';
6943 /* Hash of the derived type name. */
6944 len
= strlen (sym
->name
);
6946 for (i
= 0; i
< len
; i
++, c
++)
6947 hash
= (hash
<< 6) + (hash
<< 16) - hash
+ (*c
);
6949 /* Return the hash but take the modulus for the sake of module read,
6950 even though this slightly increases the chance of collision. */
6951 return (hash
% 100000000);
6955 /* Match the beginning of a derived type declaration. If a type name
6956 was the result of a function, then it is possible to have a symbol
6957 already to be known as a derived type yet have no components. */
6960 gfc_match_derived_decl (void)
6962 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6963 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
6964 symbol_attribute attr
;
6966 gfc_symbol
*extended
;
6968 match is_type_attr_spec
= MATCH_NO
;
6969 bool seen_attr
= false;
6971 if (gfc_current_state () == COMP_DERIVED
)
6976 gfc_clear_attr (&attr
);
6981 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
6982 if (is_type_attr_spec
== MATCH_ERROR
)
6984 if (is_type_attr_spec
== MATCH_YES
)
6986 } while (is_type_attr_spec
== MATCH_YES
);
6988 /* Deal with derived type extensions. The extension attribute has
6989 been added to 'attr' but now the parent type must be found and
6992 extended
= check_extended_derived_type (parent
);
6994 if (parent
[0] && !extended
)
6997 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
6999 gfc_error ("Expected :: in TYPE definition at %C");
7003 m
= gfc_match (" %n%t", name
);
7007 /* Make sure the name is not the name of an intrinsic type. */
7008 if (gfc_is_intrinsic_typename (name
))
7010 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7015 if (gfc_get_symbol (name
, NULL
, &sym
))
7018 if (sym
->ts
.type
!= BT_UNKNOWN
)
7020 gfc_error ("Derived type name '%s' at %C already has a basic type "
7021 "of %s", sym
->name
, gfc_typename (&sym
->ts
));
7025 /* The symbol may already have the derived attribute without the
7026 components. The ways this can happen is via a function
7027 definition, an INTRINSIC statement or a subtype in another
7028 derived type that is a pointer. The first part of the AND clause
7029 is true if the symbol is not the return value of a function. */
7030 if (sym
->attr
.flavor
!= FL_DERIVED
7031 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
7034 if (sym
->components
!= NULL
|| sym
->attr
.zero_comp
)
7036 gfc_error ("Derived type definition of '%s' at %C has already been "
7037 "defined", sym
->name
);
7041 if (attr
.access
!= ACCESS_UNKNOWN
7042 && gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
) == FAILURE
)
7045 /* See if the derived type was labeled as bind(c). */
7046 if (attr
.is_bind_c
!= 0)
7047 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
7049 /* Construct the f2k_derived namespace if it is not yet there. */
7050 if (!sym
->f2k_derived
)
7051 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7053 if (extended
&& !sym
->components
)
7058 /* Add the extended derived type as the first component. */
7059 gfc_add_component (sym
, parent
, &p
);
7061 gfc_set_sym_referenced (extended
);
7063 p
->ts
.type
= BT_DERIVED
;
7064 p
->ts
.u
.derived
= extended
;
7065 p
->initializer
= gfc_default_initializer (&p
->ts
);
7067 /* Set extension level. */
7068 if (extended
->attr
.extension
== 255)
7070 /* Since the extension field is 8 bit wide, we can only have
7071 up to 255 extension levels. */
7072 gfc_error ("Maximum extension level reached with type '%s' at %L",
7073 extended
->name
, &extended
->declared_at
);
7076 sym
->attr
.extension
= extended
->attr
.extension
+ 1;
7078 /* Provide the links between the extended type and its extension. */
7079 if (!extended
->f2k_derived
)
7080 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7081 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
7085 if (!sym
->hash_value
)
7086 /* Set the hash for the compound name for this type. */
7087 sym
->hash_value
= hash_value (sym
);
7089 /* Take over the ABSTRACT attribute. */
7090 sym
->attr
.abstract
= attr
.abstract
;
7092 gfc_new_block
= sym
;
7098 /* Cray Pointees can be declared as:
7099 pointer (ipt, a (n,m,...,*)) */
7102 gfc_mod_pointee_as (gfc_array_spec
*as
)
7104 as
->cray_pointee
= true; /* This will be useful to know later. */
7105 if (as
->type
== AS_ASSUMED_SIZE
)
7106 as
->cp_was_assumed
= true;
7107 else if (as
->type
== AS_ASSUMED_SHAPE
)
7109 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7116 /* Match the enum definition statement, here we are trying to match
7117 the first line of enum definition statement.
7118 Returns MATCH_YES if match is found. */
7121 gfc_match_enum (void)
7125 m
= gfc_match_eos ();
7129 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ENUM and ENUMERATOR at %C")
7137 /* Returns an initializer whose value is one higher than the value of the
7138 LAST_INITIALIZER argument. If the argument is NULL, the
7139 initializers value will be set to zero. The initializer's kind
7140 will be set to gfc_c_int_kind.
7142 If -fshort-enums is given, the appropriate kind will be selected
7143 later after all enumerators have been parsed. A warning is issued
7144 here if an initializer exceeds gfc_c_int_kind. */
7147 enum_initializer (gfc_expr
*last_initializer
, locus where
)
7151 result
= gfc_get_expr ();
7152 result
->expr_type
= EXPR_CONSTANT
;
7153 result
->ts
.type
= BT_INTEGER
;
7154 result
->ts
.kind
= gfc_c_int_kind
;
7155 result
->where
= where
;
7157 mpz_init (result
->value
.integer
);
7159 if (last_initializer
!= NULL
)
7161 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
7162 result
->where
= last_initializer
->where
;
7164 if (gfc_check_integer_range (result
->value
.integer
,
7165 gfc_c_int_kind
) != ARITH_OK
)
7167 gfc_error ("Enumerator exceeds the C integer type at %C");
7173 /* Control comes here, if it's the very first enumerator and no
7174 initializer has been given. It will be initialized to zero. */
7175 mpz_set_si (result
->value
.integer
, 0);
7182 /* Match a variable name with an optional initializer. When this
7183 subroutine is called, a variable is expected to be parsed next.
7184 Depending on what is happening at the moment, updates either the
7185 symbol table or the current interface. */
7188 enumerator_decl (void)
7190 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7191 gfc_expr
*initializer
;
7192 gfc_array_spec
*as
= NULL
;
7200 old_locus
= gfc_current_locus
;
7202 /* When we get here, we've just matched a list of attributes and
7203 maybe a type and a double colon. The next thing we expect to see
7204 is the name of the symbol. */
7205 m
= gfc_match_name (name
);
7209 var_locus
= gfc_current_locus
;
7211 /* OK, we've successfully matched the declaration. Now put the
7212 symbol in the current namespace. If we fail to create the symbol,
7214 if (build_sym (name
, NULL
, &as
, &var_locus
) == FAILURE
)
7220 /* The double colon must be present in order to have initializers.
7221 Otherwise the statement is ambiguous with an assignment statement. */
7224 if (gfc_match_char ('=') == MATCH_YES
)
7226 m
= gfc_match_init_expr (&initializer
);
7229 gfc_error ("Expected an initialization expression at %C");
7238 /* If we do not have an initializer, the initialization value of the
7239 previous enumerator (stored in last_initializer) is incremented
7240 by 1 and is used to initialize the current enumerator. */
7241 if (initializer
== NULL
)
7242 initializer
= enum_initializer (last_initializer
, old_locus
);
7244 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
7246 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7252 /* Store this current initializer, for the next enumerator variable
7253 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7254 use last_initializer below. */
7255 last_initializer
= initializer
;
7256 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
7258 /* Maintain enumerator history. */
7259 gfc_find_symbol (name
, NULL
, 0, &sym
);
7260 create_enum_history (sym
, last_initializer
);
7262 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
7265 /* Free stuff up and return. */
7266 gfc_free_expr (initializer
);
7272 /* Match the enumerator definition statement. */
7275 gfc_match_enumerator_def (void)
7280 gfc_clear_ts (¤t_ts
);
7282 m
= gfc_match (" enumerator");
7286 m
= gfc_match (" :: ");
7287 if (m
== MATCH_ERROR
)
7290 colon_seen
= (m
== MATCH_YES
);
7292 if (gfc_current_state () != COMP_ENUM
)
7294 gfc_error ("ENUM definition statement expected before %C");
7295 gfc_free_enum_history ();
7299 (¤t_ts
)->type
= BT_INTEGER
;
7300 (¤t_ts
)->kind
= gfc_c_int_kind
;
7302 gfc_clear_attr (¤t_attr
);
7303 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
7312 m
= enumerator_decl ();
7313 if (m
== MATCH_ERROR
)
7315 gfc_free_enum_history ();
7321 if (gfc_match_eos () == MATCH_YES
)
7323 if (gfc_match_char (',') != MATCH_YES
)
7327 if (gfc_current_state () == COMP_ENUM
)
7329 gfc_free_enum_history ();
7330 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7335 gfc_free_array_spec (current_as
);
7342 /* Match binding attributes. */
7345 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
7347 bool found_passing
= false;
7348 bool seen_ptr
= false;
7349 match m
= MATCH_YES
;
7351 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7352 this case the defaults are in there. */
7353 ba
->access
= ACCESS_UNKNOWN
;
7354 ba
->pass_arg
= NULL
;
7355 ba
->pass_arg_num
= 0;
7357 ba
->non_overridable
= 0;
7361 /* If we find a comma, we believe there are binding attributes. */
7362 m
= gfc_match_char (',');
7368 /* Access specifier. */
7370 m
= gfc_match (" public");
7371 if (m
== MATCH_ERROR
)
7375 if (ba
->access
!= ACCESS_UNKNOWN
)
7377 gfc_error ("Duplicate access-specifier at %C");
7381 ba
->access
= ACCESS_PUBLIC
;
7385 m
= gfc_match (" private");
7386 if (m
== MATCH_ERROR
)
7390 if (ba
->access
!= ACCESS_UNKNOWN
)
7392 gfc_error ("Duplicate access-specifier at %C");
7396 ba
->access
= ACCESS_PRIVATE
;
7400 /* If inside GENERIC, the following is not allowed. */
7405 m
= gfc_match (" nopass");
7406 if (m
== MATCH_ERROR
)
7412 gfc_error ("Binding attributes already specify passing,"
7413 " illegal NOPASS at %C");
7417 found_passing
= true;
7422 /* PASS possibly including argument. */
7423 m
= gfc_match (" pass");
7424 if (m
== MATCH_ERROR
)
7428 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
7432 gfc_error ("Binding attributes already specify passing,"
7433 " illegal PASS at %C");
7437 m
= gfc_match (" ( %n )", arg
);
7438 if (m
== MATCH_ERROR
)
7441 ba
->pass_arg
= gfc_get_string (arg
);
7442 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
7444 found_passing
= true;
7452 m
= gfc_match (" pointer");
7453 if (m
== MATCH_ERROR
)
7459 gfc_error ("Duplicate POINTER attribute at %C");
7469 /* NON_OVERRIDABLE flag. */
7470 m
= gfc_match (" non_overridable");
7471 if (m
== MATCH_ERROR
)
7475 if (ba
->non_overridable
)
7477 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7481 ba
->non_overridable
= 1;
7485 /* DEFERRED flag. */
7486 m
= gfc_match (" deferred");
7487 if (m
== MATCH_ERROR
)
7493 gfc_error ("Duplicate DEFERRED at %C");
7504 /* Nothing matching found. */
7506 gfc_error ("Expected access-specifier at %C");
7508 gfc_error ("Expected binding attribute at %C");
7511 while (gfc_match_char (',') == MATCH_YES
);
7513 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7514 if (ba
->non_overridable
&& ba
->deferred
)
7516 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7523 if (ba
->access
== ACCESS_UNKNOWN
)
7524 ba
->access
= gfc_typebound_default_access
;
7526 if (ppc
&& !seen_ptr
)
7528 gfc_error ("POINTER attribute is required for procedure pointer component"
7540 /* Match a PROCEDURE specific binding inside a derived type. */
7543 match_procedure_in_type (void)
7545 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7546 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
7547 char* target
= NULL
;
7548 gfc_typebound_proc
* tb
;
7556 /* Check current state. */
7557 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
7558 block
= gfc_state_stack
->previous
->sym
;
7561 /* Try to match PROCEDURE(interface). */
7562 if (gfc_match (" (") == MATCH_YES
)
7564 m
= gfc_match_name (target_buf
);
7565 if (m
== MATCH_ERROR
)
7569 gfc_error ("Interface-name expected after '(' at %C");
7573 if (gfc_match (" )") != MATCH_YES
)
7575 gfc_error ("')' expected at %C");
7579 target
= target_buf
;
7582 /* Construct the data structure. */
7583 tb
= gfc_get_typebound_proc ();
7584 tb
->where
= gfc_current_locus
;
7587 /* Match binding attributes. */
7588 m
= match_binding_attributes (tb
, false, false);
7589 if (m
== MATCH_ERROR
)
7591 seen_attrs
= (m
== MATCH_YES
);
7593 /* Check that attribute DEFERRED is given iff an interface is specified, which
7594 means target != NULL. */
7595 if (tb
->deferred
&& !target
)
7597 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7600 if (target
&& !tb
->deferred
)
7602 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7606 /* Match the colons. */
7607 m
= gfc_match (" ::");
7608 if (m
== MATCH_ERROR
)
7610 seen_colons
= (m
== MATCH_YES
);
7611 if (seen_attrs
&& !seen_colons
)
7613 gfc_error ("Expected '::' after binding-attributes at %C");
7617 /* Match the binding name. */
7618 m
= gfc_match_name (name
);
7619 if (m
== MATCH_ERROR
)
7623 gfc_error ("Expected binding name at %C");
7627 /* Try to match the '=> target', if it's there. */
7628 m
= gfc_match (" =>");
7629 if (m
== MATCH_ERROR
)
7635 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7641 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7646 m
= gfc_match_name (target_buf
);
7647 if (m
== MATCH_ERROR
)
7651 gfc_error ("Expected binding target after '=>' at %C");
7654 target
= target_buf
;
7657 /* Now we should have the end. */
7658 m
= gfc_match_eos ();
7659 if (m
== MATCH_ERROR
)
7663 gfc_error ("Junk after PROCEDURE declaration at %C");
7667 /* If no target was found, it has the same name as the binding. */
7671 /* Get the namespace to insert the symbols into. */
7672 ns
= block
->f2k_derived
;
7675 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7676 if (tb
->deferred
&& !block
->attr
.abstract
)
7678 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7683 /* See if we already have a binding with this name in the symtree which would
7684 be an error. If a GENERIC already targetted this binding, it may be
7685 already there but then typebound is still NULL. */
7686 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7687 if (stree
&& stree
->n
.tb
)
7689 gfc_error ("There's already a procedure with binding name '%s' for the"
7690 " derived type '%s' at %C", name
, block
->name
);
7694 /* Insert it and set attributes. */
7698 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7703 if (gfc_get_sym_tree (target
, gfc_current_ns
, &tb
->u
.specific
, false))
7705 gfc_set_sym_referenced (tb
->u
.specific
->n
.sym
);
7711 /* Match a GENERIC procedure binding inside a derived type. */
7714 gfc_match_generic (void)
7716 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7717 char bind_name
[GFC_MAX_SYMBOL_LEN
+ 16]; /* Allow space for OPERATOR(...). */
7719 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
7720 gfc_typebound_proc
* tb
;
7722 interface_type op_type
;
7723 gfc_intrinsic_op op
;
7726 /* Check current state. */
7727 if (gfc_current_state () == COMP_DERIVED
)
7729 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7732 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
7734 block
= gfc_state_stack
->previous
->sym
;
7735 ns
= block
->f2k_derived
;
7736 gcc_assert (block
&& ns
);
7738 /* See if we get an access-specifier. */
7739 m
= match_binding_attributes (&tbattr
, true, false);
7740 if (m
== MATCH_ERROR
)
7743 /* Now the colons, those are required. */
7744 if (gfc_match (" ::") != MATCH_YES
)
7746 gfc_error ("Expected '::' at %C");
7750 /* Match the binding name; depending on type (operator / generic) format
7751 it for future error messages into bind_name. */
7753 m
= gfc_match_generic_spec (&op_type
, name
, &op
);
7754 if (m
== MATCH_ERROR
)
7758 gfc_error ("Expected generic name or operator descriptor at %C");
7764 case INTERFACE_GENERIC
:
7765 snprintf (bind_name
, sizeof (bind_name
), "%s", name
);
7768 case INTERFACE_USER_OP
:
7769 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(.%s.)", name
);
7772 case INTERFACE_INTRINSIC_OP
:
7773 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(%s)",
7774 gfc_op2string (op
));
7781 /* Match the required =>. */
7782 if (gfc_match (" =>") != MATCH_YES
)
7784 gfc_error ("Expected '=>' at %C");
7788 /* Try to find existing GENERIC binding with this name / for this operator;
7789 if there is something, check that it is another GENERIC and then extend
7790 it rather than building a new node. Otherwise, create it and put it
7791 at the right position. */
7795 case INTERFACE_USER_OP
:
7796 case INTERFACE_GENERIC
:
7798 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
7801 st
= gfc_find_symtree (is_op
? ns
->tb_uop_root
: ns
->tb_sym_root
, name
);
7813 case INTERFACE_INTRINSIC_OP
:
7823 if (!tb
->is_generic
)
7825 gcc_assert (op_type
== INTERFACE_GENERIC
);
7826 gfc_error ("There's already a non-generic procedure with binding name"
7827 " '%s' for the derived type '%s' at %C",
7828 bind_name
, block
->name
);
7832 if (tb
->access
!= tbattr
.access
)
7834 gfc_error ("Binding at %C must have the same access as already"
7835 " defined binding '%s'", bind_name
);
7841 tb
= gfc_get_typebound_proc ();
7842 tb
->where
= gfc_current_locus
;
7843 tb
->access
= tbattr
.access
;
7845 tb
->u
.generic
= NULL
;
7849 case INTERFACE_GENERIC
:
7850 case INTERFACE_USER_OP
:
7852 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
7855 st
= gfc_new_symtree (is_op
? &ns
->tb_uop_root
: &ns
->tb_sym_root
,
7863 case INTERFACE_INTRINSIC_OP
:
7872 /* Now, match all following names as specific targets. */
7875 gfc_symtree
* target_st
;
7876 gfc_tbp_generic
* target
;
7878 m
= gfc_match_name (name
);
7879 if (m
== MATCH_ERROR
)
7883 gfc_error ("Expected specific binding name at %C");
7887 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
7889 /* See if this is a duplicate specification. */
7890 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
7891 if (target_st
== target
->specific_st
)
7893 gfc_error ("'%s' already defined as specific binding for the"
7894 " generic '%s' at %C", name
, bind_name
);
7898 target
= gfc_get_tbp_generic ();
7899 target
->specific_st
= target_st
;
7900 target
->specific
= NULL
;
7901 target
->next
= tb
->u
.generic
;
7902 tb
->u
.generic
= target
;
7904 while (gfc_match (" ,") == MATCH_YES
);
7906 /* Here should be the end. */
7907 if (gfc_match_eos () != MATCH_YES
)
7909 gfc_error ("Junk after GENERIC binding at %C");
7920 /* Match a FINAL declaration inside a derived type. */
7923 gfc_match_final_decl (void)
7925 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7928 gfc_namespace
* module_ns
;
7932 if (gfc_current_form
== FORM_FREE
)
7934 char c
= gfc_peek_ascii_char ();
7935 if (!gfc_is_whitespace (c
) && c
!= ':')
7939 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
7941 if (gfc_current_form
== FORM_FIXED
)
7944 gfc_error ("FINAL declaration at %C must be inside a derived type "
7945 "CONTAINS section");
7949 block
= gfc_state_stack
->previous
->sym
;
7952 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
7953 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
7955 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7956 " specification part of a MODULE");
7960 module_ns
= gfc_current_ns
;
7961 gcc_assert (module_ns
);
7962 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
7964 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7965 if (gfc_match (" ::") == MATCH_ERROR
)
7968 /* Match the sequence of procedure names. */
7975 if (first
&& gfc_match_eos () == MATCH_YES
)
7977 gfc_error ("Empty FINAL at %C");
7981 m
= gfc_match_name (name
);
7984 gfc_error ("Expected module procedure name at %C");
7987 else if (m
!= MATCH_YES
)
7990 if (gfc_match_eos () == MATCH_YES
)
7992 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7994 gfc_error ("Expected ',' at %C");
7998 if (gfc_get_symbol (name
, module_ns
, &sym
))
8000 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
8004 /* Mark the symbol as module procedure. */
8005 if (sym
->attr
.proc
!= PROC_MODULE
8006 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
8007 sym
->name
, NULL
) == FAILURE
)
8010 /* Check if we already have this symbol in the list, this is an error. */
8011 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
8012 if (f
->proc_sym
== sym
)
8014 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8019 /* Add this symbol to the list of finalizers. */
8020 gcc_assert (block
->f2k_derived
);
8022 f
= XCNEW (gfc_finalizer
);
8024 f
->proc_tree
= NULL
;
8025 f
->where
= gfc_current_locus
;
8026 f
->next
= block
->f2k_derived
->finalizers
;
8027 block
->f2k_derived
->finalizers
= f
;
8037 const ext_attr_t ext_attr_list
[] = {
8038 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
8039 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
8040 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
8041 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
8042 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
8043 { NULL
, EXT_ATTR_LAST
, NULL
}
8046 /* Match a !GCC$ ATTRIBUTES statement of the form:
8047 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8048 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8050 TODO: We should support all GCC attributes using the same syntax for
8051 the attribute list, i.e. the list in C
8052 __attributes(( attribute-list ))
8054 !GCC$ ATTRIBUTES attribute-list ::
8055 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8058 As there is absolutely no risk of confusion, we should never return
8061 gfc_match_gcc_attributes (void)
8063 symbol_attribute attr
;
8064 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8069 gfc_clear_attr (&attr
);
8074 if (gfc_match_name (name
) != MATCH_YES
)
8077 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
8078 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
8081 if (id
== EXT_ATTR_LAST
)
8083 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8087 if (gfc_add_ext_attribute (&attr
, (ext_attr_id_t
) id
, &gfc_current_locus
)
8091 gfc_gobble_whitespace ();
8092 ch
= gfc_next_ascii_char ();
8095 /* This is the successful exit condition for the loop. */
8096 if (gfc_next_ascii_char () == ':')
8106 if (gfc_match_eos () == MATCH_YES
)
8111 m
= gfc_match_name (name
);
8115 if (find_special (name
, &sym
, true))
8118 sym
->attr
.ext_attr
|= attr
.ext_attr
;
8120 if (gfc_match_eos () == MATCH_YES
)
8123 if (gfc_match_char (',') != MATCH_YES
)
8130 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");