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/>. */
28 #include "constructor.h"
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_get_int_expr (gfc_default_integer_kind
, NULL
, 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
, false);
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
1343 = gfc_get_int_expr (gfc_default_integer_kind
,
1346 else if (init
->expr_type
== EXPR_ARRAY
)
1349 c
= gfc_constructor_first (init
->value
.constructor
);
1350 clen
= c
->expr
->value
.character
.length
;
1351 sym
->ts
.u
.cl
->length
1352 = gfc_get_int_expr (gfc_default_integer_kind
,
1355 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
1356 sym
->ts
.u
.cl
->length
=
1357 gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
1360 /* Update initializer character length according symbol. */
1361 else if (sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1363 int len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
1365 if (init
->expr_type
== EXPR_CONSTANT
)
1366 gfc_set_constant_character_len (len
, init
, -1);
1367 else if (init
->expr_type
== EXPR_ARRAY
)
1371 /* Build a new charlen to prevent simplification from
1372 deleting the length before it is resolved. */
1373 init
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1374 init
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->ts
.u
.cl
->length
);
1376 for (c
= gfc_constructor_first (init
->value
.constructor
);
1377 c
; c
= gfc_constructor_next (c
))
1378 gfc_set_constant_character_len (len
, c
->expr
, -1);
1383 /* Need to check if the expression we initialized this
1384 to was one of the iso_c_binding named constants. If so,
1385 and we're a parameter (constant), let it be iso_c.
1387 integer(c_int), parameter :: my_int = c_int
1388 integer(my_int) :: my_int_2
1389 If we mark my_int as iso_c (since we can see it's value
1390 is equal to one of the named constants), then my_int_2
1391 will be considered C interoperable. */
1392 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1394 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1395 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1396 /* attr bits needed for module files. */
1397 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1398 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1399 if (init
->ts
.is_iso_c
)
1400 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1403 /* Add initializer. Make sure we keep the ranks sane. */
1404 if (sym
->attr
.dimension
&& init
->rank
== 0)
1409 if (sym
->attr
.flavor
== FL_PARAMETER
1410 && init
->expr_type
== EXPR_CONSTANT
1411 && spec_size (sym
->as
, &size
) == SUCCESS
1412 && mpz_cmp_si (size
, 0) > 0)
1414 array
= gfc_get_array_expr (init
->ts
.type
, init
->ts
.kind
,
1416 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1417 gfc_constructor_append_expr (&array
->value
.constructor
,
1420 : gfc_copy_expr (init
),
1423 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1424 for (n
= 0; n
< sym
->as
->rank
; n
++)
1425 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1430 init
->rank
= sym
->as
->rank
;
1434 if (sym
->attr
.save
== SAVE_NONE
)
1435 sym
->attr
.save
= SAVE_IMPLICIT
;
1443 /* Function called by variable_decl() that adds a name to a structure
1447 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1448 gfc_array_spec
**as
)
1451 gfc_try t
= SUCCESS
;
1453 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1454 constructing, it must have the pointer attribute. */
1455 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1456 && current_ts
.u
.derived
== gfc_current_block ()
1457 && current_attr
.pointer
== 0)
1459 gfc_error ("Component at %C must have the POINTER attribute");
1463 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1465 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1467 gfc_error ("Array component of structure at %C must have explicit "
1468 "or deferred shape");
1473 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
1477 if (c
->ts
.type
== BT_CHARACTER
)
1479 c
->attr
= current_attr
;
1481 c
->initializer
= *init
;
1488 c
->attr
.codimension
= 1;
1490 c
->attr
.dimension
= 1;
1494 /* Should this ever get more complicated, combine with similar section
1495 in add_init_expr_to_sym into a separate function. */
1496 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
&& c
->ts
.u
.cl
1497 && c
->ts
.u
.cl
->length
&& c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1501 gcc_assert (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
);
1502 gcc_assert (c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1503 gcc_assert (c
->ts
.u
.cl
->length
->ts
.type
== BT_INTEGER
);
1505 len
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
1507 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1508 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1509 else if (mpz_cmp (c
->ts
.u
.cl
->length
->value
.integer
,
1510 c
->initializer
->ts
.u
.cl
->length
->value
.integer
))
1512 gfc_constructor
*ctor
;
1513 ctor
= gfc_constructor_first (c
->initializer
->value
.constructor
);
1518 bool has_ts
= (c
->initializer
->ts
.u
.cl
1519 && c
->initializer
->ts
.u
.cl
->length_from_typespec
);
1521 /* Remember the length of the first element for checking
1522 that all elements *in the constructor* have the same
1523 length. This need not be the length of the LHS! */
1524 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1525 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1526 first_len
= ctor
->expr
->value
.character
.length
;
1528 for ( ; ctor
; ctor
= gfc_constructor_next (ctor
))
1529 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1531 gfc_set_constant_character_len (len
, ctor
->expr
,
1532 has_ts
? -1 : first_len
);
1533 ctor
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (c
->ts
.u
.cl
->length
);
1539 /* Check array components. */
1540 if (!c
->attr
.dimension
)
1543 if (c
->attr
.pointer
)
1545 if (c
->as
->type
!= AS_DEFERRED
)
1547 gfc_error ("Pointer array component of structure at %C must have a "
1552 else if (c
->attr
.allocatable
)
1554 if (c
->as
->type
!= AS_DEFERRED
)
1556 gfc_error ("Allocatable component of structure at %C must have a "
1563 if (c
->as
->type
!= AS_EXPLICIT
)
1565 gfc_error ("Array component of structure at %C must have an "
1572 if (c
->ts
.type
== BT_CLASS
)
1573 gfc_build_class_symbol (&c
->ts
, &c
->attr
, &c
->as
, true);
1579 /* Match a 'NULL()', and possibly take care of some side effects. */
1582 gfc_match_null (gfc_expr
**result
)
1587 m
= gfc_match (" null ( )");
1591 /* The NULL symbol now has to be/become an intrinsic function. */
1592 if (gfc_get_symbol ("null", NULL
, &sym
))
1594 gfc_error ("NULL() initialization at %C is ambiguous");
1598 gfc_intrinsic_symbol (sym
);
1600 if (sym
->attr
.proc
!= PROC_INTRINSIC
1601 && (gfc_add_procedure (&sym
->attr
, PROC_INTRINSIC
,
1602 sym
->name
, NULL
) == FAILURE
1603 || gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
))
1606 *result
= gfc_get_null_expr (&gfc_current_locus
);
1612 /* Match a variable name with an optional initializer. When this
1613 subroutine is called, a variable is expected to be parsed next.
1614 Depending on what is happening at the moment, updates either the
1615 symbol table or the current interface. */
1618 variable_decl (int elem
)
1620 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1621 gfc_expr
*initializer
, *char_len
;
1623 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1634 /* When we get here, we've just matched a list of attributes and
1635 maybe a type and a double colon. The next thing we expect to see
1636 is the name of the symbol. */
1637 m
= gfc_match_name (name
);
1641 var_locus
= gfc_current_locus
;
1643 /* Now we could see the optional array spec. or character length. */
1644 m
= gfc_match_array_spec (&as
, true, true);
1645 if (gfc_option
.flag_cray_pointer
&& m
== MATCH_YES
)
1646 cp_as
= gfc_copy_array_spec (as
);
1647 else if (m
== MATCH_ERROR
)
1651 as
= gfc_copy_array_spec (current_as
);
1652 else if (current_as
)
1653 merge_array_spec (current_as
, as
, true);
1658 if (current_ts
.type
== BT_CHARACTER
)
1660 switch (match_char_length (&char_len
))
1663 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1665 cl
->length
= char_len
;
1668 /* Non-constant lengths need to be copied after the first
1669 element. Also copy assumed lengths. */
1672 && (current_ts
.u
.cl
->length
== NULL
1673 || current_ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1675 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1676 cl
->length
= gfc_copy_expr (current_ts
.u
.cl
->length
);
1679 cl
= current_ts
.u
.cl
;
1688 /* If this symbol has already shown up in a Cray Pointer declaration,
1689 then we want to set the type & bail out. */
1690 if (gfc_option
.flag_cray_pointer
)
1692 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1693 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
1695 sym
->ts
.type
= current_ts
.type
;
1696 sym
->ts
.kind
= current_ts
.kind
;
1698 sym
->ts
.u
.derived
= current_ts
.u
.derived
;
1699 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
1700 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
1703 /* Check to see if we have an array specification. */
1706 if (sym
->as
!= NULL
)
1708 gfc_error ("Duplicate array spec for Cray pointee at %C");
1709 gfc_free_array_spec (cp_as
);
1715 if (gfc_set_array_spec (sym
, cp_as
, &var_locus
) == FAILURE
)
1716 gfc_internal_error ("Couldn't set pointee array spec.");
1718 /* Fix the array spec. */
1719 m
= gfc_mod_pointee_as (sym
->as
);
1720 if (m
== MATCH_ERROR
)
1728 gfc_free_array_spec (cp_as
);
1732 /* Procedure pointer as function result. */
1733 if (gfc_current_state () == COMP_FUNCTION
1734 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
1735 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
1736 strcpy (name
, "ppr@");
1738 if (gfc_current_state () == COMP_FUNCTION
1739 && strcmp (name
, gfc_current_block ()->name
) == 0
1740 && gfc_current_block ()->result
1741 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
1742 strcpy (name
, "ppr@");
1744 /* OK, we've successfully matched the declaration. Now put the
1745 symbol in the current namespace, because it might be used in the
1746 optional initialization expression for this symbol, e.g. this is
1749 integer, parameter :: i = huge(i)
1751 This is only true for parameters or variables of a basic type.
1752 For components of derived types, it is not true, so we don't
1753 create a symbol for those yet. If we fail to create the symbol,
1755 if (gfc_current_state () != COMP_DERIVED
1756 && build_sym (name
, cl
, &as
, &var_locus
) == FAILURE
)
1762 /* An interface body specifies all of the procedure's
1763 characteristics and these shall be consistent with those
1764 specified in the procedure definition, except that the interface
1765 may specify a procedure that is not pure if the procedure is
1766 defined to be pure(12.3.2). */
1767 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1768 && gfc_current_ns
->proc_name
1769 && gfc_current_ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
1770 && current_ts
.u
.derived
->ns
!= gfc_current_ns
)
1773 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, current_ts
.u
.derived
->name
);
1774 if (!(current_ts
.u
.derived
->attr
.imported
1776 && st
->n
.sym
== current_ts
.u
.derived
)
1777 && !gfc_current_ns
->has_import_set
)
1779 gfc_error ("the type of '%s' at %C has not been declared within the "
1786 /* In functions that have a RESULT variable defined, the function
1787 name always refers to function calls. Therefore, the name is
1788 not allowed to appear in specification statements. */
1789 if (gfc_current_state () == COMP_FUNCTION
1790 && gfc_current_block () != NULL
1791 && gfc_current_block ()->result
!= NULL
1792 && gfc_current_block ()->result
!= gfc_current_block ()
1793 && strcmp (gfc_current_block ()->name
, name
) == 0)
1795 gfc_error ("Function name '%s' not allowed at %C", name
);
1800 /* We allow old-style initializations of the form
1801 integer i /2/, j(4) /3*3, 1/
1802 (if no colon has been seen). These are different from data
1803 statements in that initializers are only allowed to apply to the
1804 variable immediately preceding, i.e.
1806 is not allowed. Therefore we have to do some work manually, that
1807 could otherwise be left to the matchers for DATA statements. */
1809 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
1811 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Old-style "
1812 "initialization at %C") == FAILURE
)
1815 return match_old_style_init (name
);
1818 /* The double colon must be present in order to have initializers.
1819 Otherwise the statement is ambiguous with an assignment statement. */
1822 if (gfc_match (" =>") == MATCH_YES
)
1824 if (!current_attr
.pointer
)
1826 gfc_error ("Initialization at %C isn't for a pointer variable");
1831 m
= gfc_match_null (&initializer
);
1834 gfc_error ("Pointer initialization requires a NULL() at %C");
1838 if (gfc_pure (NULL
) && gfc_state_stack
->state
!= COMP_DERIVED
)
1840 gfc_error ("Initialization of pointer at %C is not allowed in "
1841 "a PURE procedure");
1849 else if (gfc_match_char ('=') == MATCH_YES
)
1851 if (current_attr
.pointer
)
1853 gfc_error ("Pointer initialization at %C requires '=>', "
1859 m
= gfc_match_init_expr (&initializer
);
1862 gfc_error ("Expected an initialization expression at %C");
1866 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
)
1867 && gfc_state_stack
->state
!= COMP_DERIVED
)
1869 gfc_error ("Initialization of variable at %C is not allowed in "
1870 "a PURE procedure");
1879 if (initializer
!= NULL
&& current_attr
.allocatable
1880 && gfc_current_state () == COMP_DERIVED
)
1882 gfc_error ("Initialization of allocatable component at %C is not "
1888 /* Add the initializer. Note that it is fine if initializer is
1889 NULL here, because we sometimes also need to check if a
1890 declaration *must* have an initialization expression. */
1891 if (gfc_current_state () != COMP_DERIVED
)
1892 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
1895 if (current_ts
.type
== BT_DERIVED
1896 && !current_attr
.pointer
&& !initializer
)
1897 initializer
= gfc_default_initializer (¤t_ts
);
1898 t
= build_struct (name
, cl
, &initializer
, &as
);
1901 m
= (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
1904 /* Free stuff up and return. */
1905 gfc_free_expr (initializer
);
1906 gfc_free_array_spec (as
);
1912 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1913 This assumes that the byte size is equal to the kind number for
1914 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1917 gfc_match_old_kind_spec (gfc_typespec
*ts
)
1922 if (gfc_match_char ('*') != MATCH_YES
)
1925 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
1929 original_kind
= ts
->kind
;
1931 /* Massage the kind numbers for complex types. */
1932 if (ts
->type
== BT_COMPLEX
)
1936 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1937 gfc_basic_typename (ts
->type
), original_kind
);
1943 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
1945 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1946 gfc_basic_typename (ts
->type
), original_kind
);
1950 if (gfc_notify_std (GFC_STD_GNU
, "Nonstandard type declaration %s*%d at %C",
1951 gfc_basic_typename (ts
->type
), original_kind
) == FAILURE
)
1958 /* Match a kind specification. Since kinds are generally optional, we
1959 usually return MATCH_NO if something goes wrong. If a "kind="
1960 string is found, then we know we have an error. */
1963 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
1975 where
= loc
= gfc_current_locus
;
1980 if (gfc_match_char ('(') == MATCH_NO
)
1983 /* Also gobbles optional text. */
1984 if (gfc_match (" kind = ") == MATCH_YES
)
1987 loc
= gfc_current_locus
;
1990 n
= gfc_match_init_expr (&e
);
1994 if (gfc_matching_function
)
1996 /* The function kind expression might include use associated or
1997 imported parameters and try again after the specification
1999 if (gfc_match_char (')') != MATCH_YES
)
2001 gfc_error ("Missing right parenthesis at %C");
2007 gfc_undo_symbols ();
2012 /* ....or else, the match is real. */
2014 gfc_error ("Expected initialization expression at %C");
2022 gfc_error ("Expected scalar initialization expression at %C");
2027 msg
= gfc_extract_int (e
, &ts
->kind
);
2036 /* Before throwing away the expression, let's see if we had a
2037 C interoperable kind (and store the fact). */
2038 if (e
->ts
.is_c_interop
== 1)
2040 /* Mark this as c interoperable if being declared with one
2041 of the named constants from iso_c_binding. */
2042 ts
->is_c_interop
= e
->ts
.is_iso_c
;
2043 ts
->f90_type
= e
->ts
.f90_type
;
2049 /* Ignore errors to this point, if we've gotten here. This means
2050 we ignore the m=MATCH_ERROR from above. */
2051 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2053 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
2054 gfc_basic_typename (ts
->type
));
2055 gfc_current_locus
= where
;
2059 /* Warn if, e.g., c_int is used for a REAL variable, but not
2060 if, e.g., c_double is used for COMPLEX as the standard
2061 explicitly says that the kind type parameter for complex and real
2062 variable is the same, i.e. c_float == c_float_complex. */
2063 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2064 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2065 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2066 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2067 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2068 gfc_basic_typename (ts
->type
));
2070 gfc_gobble_whitespace ();
2071 if ((c
= gfc_next_ascii_char ()) != ')'
2072 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2074 if (ts
->type
== BT_CHARACTER
)
2075 gfc_error ("Missing right parenthesis or comma at %C");
2077 gfc_error ("Missing right parenthesis at %C");
2081 /* All tests passed. */
2084 if(m
== MATCH_ERROR
)
2085 gfc_current_locus
= where
;
2087 /* Return what we know from the test(s). */
2092 gfc_current_locus
= where
;
2098 match_char_kind (int * kind
, int * is_iso_c
)
2107 where
= gfc_current_locus
;
2109 n
= gfc_match_init_expr (&e
);
2111 if (n
!= MATCH_YES
&& gfc_matching_function
)
2113 /* The expression might include use-associated or imported
2114 parameters and try again after the specification
2117 gfc_undo_symbols ();
2122 gfc_error ("Expected initialization expression at %C");
2128 gfc_error ("Expected scalar initialization expression at %C");
2133 msg
= gfc_extract_int (e
, kind
);
2134 *is_iso_c
= e
->ts
.is_iso_c
;
2144 /* Ignore errors to this point, if we've gotten here. This means
2145 we ignore the m=MATCH_ERROR from above. */
2146 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2148 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2152 /* All tests passed. */
2155 if (m
== MATCH_ERROR
)
2156 gfc_current_locus
= where
;
2158 /* Return what we know from the test(s). */
2163 gfc_current_locus
= where
;
2168 /* Match the various kind/length specifications in a CHARACTER
2169 declaration. We don't return MATCH_NO. */
2172 gfc_match_char_spec (gfc_typespec
*ts
)
2174 int kind
, seen_length
, is_iso_c
;
2184 /* Try the old-style specification first. */
2185 old_char_selector
= 0;
2187 m
= match_char_length (&len
);
2191 old_char_selector
= 1;
2196 m
= gfc_match_char ('(');
2199 m
= MATCH_YES
; /* Character without length is a single char. */
2203 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2204 if (gfc_match (" kind =") == MATCH_YES
)
2206 m
= match_char_kind (&kind
, &is_iso_c
);
2208 if (m
== MATCH_ERROR
)
2213 if (gfc_match (" , len =") == MATCH_NO
)
2216 m
= char_len_param_value (&len
);
2219 if (m
== MATCH_ERROR
)
2226 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2227 if (gfc_match (" len =") == MATCH_YES
)
2229 m
= char_len_param_value (&len
);
2232 if (m
== MATCH_ERROR
)
2236 if (gfc_match_char (')') == MATCH_YES
)
2239 if (gfc_match (" , kind =") != MATCH_YES
)
2242 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2248 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2249 m
= char_len_param_value (&len
);
2252 if (m
== MATCH_ERROR
)
2256 m
= gfc_match_char (')');
2260 if (gfc_match_char (',') != MATCH_YES
)
2263 gfc_match (" kind ="); /* Gobble optional text. */
2265 m
= match_char_kind (&kind
, &is_iso_c
);
2266 if (m
== MATCH_ERROR
)
2272 /* Require a right-paren at this point. */
2273 m
= gfc_match_char (')');
2278 gfc_error ("Syntax error in CHARACTER declaration at %C");
2280 gfc_free_expr (len
);
2284 /* Deal with character functions after USE and IMPORT statements. */
2285 if (gfc_matching_function
)
2287 gfc_free_expr (len
);
2288 gfc_undo_symbols ();
2294 gfc_free_expr (len
);
2298 /* Do some final massaging of the length values. */
2299 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2301 if (seen_length
== 0)
2302 cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
2307 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2309 /* We have to know if it was a c interoperable kind so we can
2310 do accurate type checking of bind(c) procs, etc. */
2312 /* Mark this as c interoperable if being declared with one
2313 of the named constants from iso_c_binding. */
2314 ts
->is_c_interop
= is_iso_c
;
2315 else if (len
!= NULL
)
2316 /* Here, we might have parsed something such as: character(c_char)
2317 In this case, the parsing code above grabs the c_char when
2318 looking for the length (line 1690, roughly). it's the last
2319 testcase for parsing the kind params of a character variable.
2320 However, it's not actually the length. this seems like it
2322 To see if the user used a C interop kind, test the expr
2323 of the so called length, and see if it's C interoperable. */
2324 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2330 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2331 structure to the matched specification. This is necessary for FUNCTION and
2332 IMPLICIT statements.
2334 If implicit_flag is nonzero, then we don't check for the optional
2335 kind specification. Not doing so is needed for matching an IMPLICIT
2336 statement correctly. */
2339 gfc_match_decl_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2341 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2345 bool seen_deferred_kind
, matched_type
;
2347 /* A belt and braces check that the typespec is correctly being treated
2348 as a deferred characteristic association. */
2349 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2350 && (gfc_current_block ()->result
->ts
.kind
== -1)
2351 && (ts
->kind
== -1);
2353 if (seen_deferred_kind
)
2356 /* Clear the current binding label, in case one is given. */
2357 curr_binding_label
[0] = '\0';
2359 if (gfc_match (" byte") == MATCH_YES
)
2361 if (gfc_notify_std (GFC_STD_GNU
, "Extension: BYTE type at %C")
2365 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2367 gfc_error ("BYTE type used at %C "
2368 "is not available on the target machine");
2372 ts
->type
= BT_INTEGER
;
2378 m
= gfc_match (" type ( %n", name
);
2379 matched_type
= (m
== MATCH_YES
);
2381 if ((matched_type
&& strcmp ("integer", name
) == 0)
2382 || (!matched_type
&& gfc_match (" integer") == MATCH_YES
))
2384 ts
->type
= BT_INTEGER
;
2385 ts
->kind
= gfc_default_integer_kind
;
2389 if ((matched_type
&& strcmp ("character", name
) == 0)
2390 || (!matched_type
&& gfc_match (" character") == MATCH_YES
))
2393 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2394 "intrinsic-type-spec at %C") == FAILURE
)
2397 ts
->type
= BT_CHARACTER
;
2398 if (implicit_flag
== 0)
2399 m
= gfc_match_char_spec (ts
);
2403 if (matched_type
&& m
== MATCH_YES
&& gfc_match_char (')') != MATCH_YES
)
2409 if ((matched_type
&& strcmp ("real", name
) == 0)
2410 || (!matched_type
&& gfc_match (" real") == MATCH_YES
))
2413 ts
->kind
= gfc_default_real_kind
;
2418 && (strcmp ("doubleprecision", name
) == 0
2419 || (strcmp ("double", name
) == 0
2420 && gfc_match (" precision") == MATCH_YES
)))
2421 || (!matched_type
&& gfc_match (" double precision") == MATCH_YES
))
2424 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2425 "intrinsic-type-spec at %C") == FAILURE
)
2427 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2431 ts
->kind
= gfc_default_double_kind
;
2435 if ((matched_type
&& strcmp ("complex", name
) == 0)
2436 || (!matched_type
&& gfc_match (" complex") == MATCH_YES
))
2438 ts
->type
= BT_COMPLEX
;
2439 ts
->kind
= gfc_default_complex_kind
;
2444 && (strcmp ("doublecomplex", name
) == 0
2445 || (strcmp ("double", name
) == 0
2446 && gfc_match (" complex") == MATCH_YES
)))
2447 || (!matched_type
&& gfc_match (" double complex") == MATCH_YES
))
2449 if (gfc_notify_std (GFC_STD_GNU
, "Extension: DOUBLE COMPLEX at %C")
2454 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2455 "intrinsic-type-spec at %C") == FAILURE
)
2458 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2461 ts
->type
= BT_COMPLEX
;
2462 ts
->kind
= gfc_default_double_kind
;
2466 if ((matched_type
&& strcmp ("logical", name
) == 0)
2467 || (!matched_type
&& gfc_match (" logical") == MATCH_YES
))
2469 ts
->type
= BT_LOGICAL
;
2470 ts
->kind
= gfc_default_logical_kind
;
2475 m
= gfc_match_char (')');
2478 ts
->type
= BT_DERIVED
;
2481 m
= gfc_match (" class ( %n )", name
);
2484 ts
->type
= BT_CLASS
;
2486 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: CLASS statement at %C")
2491 /* Defer association of the derived type until the end of the
2492 specification block. However, if the derived type can be
2493 found, add it to the typespec. */
2494 if (gfc_matching_function
)
2496 ts
->u
.derived
= NULL
;
2497 if (gfc_current_state () != COMP_INTERFACE
2498 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2499 ts
->u
.derived
= sym
;
2503 /* Search for the name but allow the components to be defined later. If
2504 type = -1, this typespec has been seen in a function declaration but
2505 the type could not be accessed at that point. */
2507 if (ts
->kind
!= -1 && gfc_get_ha_symbol (name
, &sym
))
2509 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2512 else if (ts
->kind
== -1)
2514 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2515 || gfc_current_ns
->has_import_set
;
2516 if (gfc_find_symbol (name
, NULL
, iface
, &sym
))
2518 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2527 if (sym
->attr
.flavor
!= FL_DERIVED
2528 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
2531 gfc_set_sym_referenced (sym
);
2532 ts
->u
.derived
= sym
;
2538 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2539 "intrinsic-type-spec at %C") == FAILURE
)
2542 /* For all types except double, derived and character, look for an
2543 optional kind specifier. MATCH_NO is actually OK at this point. */
2544 if (implicit_flag
== 1)
2546 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2552 if (gfc_current_form
== FORM_FREE
)
2554 c
= gfc_peek_ascii_char ();
2555 if (!gfc_is_whitespace (c
) && c
!= '*' && c
!= '('
2556 && c
!= ':' && c
!= ',')
2558 if (matched_type
&& c
== ')')
2560 gfc_next_ascii_char ();
2567 m
= gfc_match_kind_spec (ts
, false);
2568 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2569 m
= gfc_match_old_kind_spec (ts
);
2571 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2574 /* Defer association of the KIND expression of function results
2575 until after USE and IMPORT statements. */
2576 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2577 || gfc_matching_function
)
2581 m
= MATCH_YES
; /* No kind specifier found. */
2587 /* Match an IMPLICIT NONE statement. Actually, this statement is
2588 already matched in parse.c, or we would not end up here in the
2589 first place. So the only thing we need to check, is if there is
2590 trailing garbage. If not, the match is successful. */
2593 gfc_match_implicit_none (void)
2595 return (gfc_match_eos () == MATCH_YES
) ? MATCH_YES
: MATCH_NO
;
2599 /* Match the letter range(s) of an IMPLICIT statement. */
2602 match_implicit_range (void)
2608 cur_loc
= gfc_current_locus
;
2610 gfc_gobble_whitespace ();
2611 c
= gfc_next_ascii_char ();
2614 gfc_error ("Missing character range in IMPLICIT at %C");
2621 gfc_gobble_whitespace ();
2622 c1
= gfc_next_ascii_char ();
2626 gfc_gobble_whitespace ();
2627 c
= gfc_next_ascii_char ();
2632 inner
= 0; /* Fall through. */
2639 gfc_gobble_whitespace ();
2640 c2
= gfc_next_ascii_char ();
2644 gfc_gobble_whitespace ();
2645 c
= gfc_next_ascii_char ();
2647 if ((c
!= ',') && (c
!= ')'))
2660 gfc_error ("Letters must be in alphabetic order in "
2661 "IMPLICIT statement at %C");
2665 /* See if we can add the newly matched range to the pending
2666 implicits from this IMPLICIT statement. We do not check for
2667 conflicts with whatever earlier IMPLICIT statements may have
2668 set. This is done when we've successfully finished matching
2670 if (gfc_add_new_implicit_range (c1
, c2
) != SUCCESS
)
2677 gfc_syntax_error (ST_IMPLICIT
);
2679 gfc_current_locus
= cur_loc
;
2684 /* Match an IMPLICIT statement, storing the types for
2685 gfc_set_implicit() if the statement is accepted by the parser.
2686 There is a strange looking, but legal syntactic construction
2687 possible. It looks like:
2689 IMPLICIT INTEGER (a-b) (c-d)
2691 This is legal if "a-b" is a constant expression that happens to
2692 equal one of the legal kinds for integers. The real problem
2693 happens with an implicit specification that looks like:
2695 IMPLICIT INTEGER (a-b)
2697 In this case, a typespec matcher that is "greedy" (as most of the
2698 matchers are) gobbles the character range as a kindspec, leaving
2699 nothing left. We therefore have to go a bit more slowly in the
2700 matching process by inhibiting the kindspec checking during
2701 typespec matching and checking for a kind later. */
2704 gfc_match_implicit (void)
2713 /* We don't allow empty implicit statements. */
2714 if (gfc_match_eos () == MATCH_YES
)
2716 gfc_error ("Empty IMPLICIT statement at %C");
2722 /* First cleanup. */
2723 gfc_clear_new_implicit ();
2725 /* A basic type is mandatory here. */
2726 m
= gfc_match_decl_type_spec (&ts
, 1);
2727 if (m
== MATCH_ERROR
)
2732 cur_loc
= gfc_current_locus
;
2733 m
= match_implicit_range ();
2737 /* We may have <TYPE> (<RANGE>). */
2738 gfc_gobble_whitespace ();
2739 c
= gfc_next_ascii_char ();
2740 if ((c
== '\n') || (c
== ','))
2742 /* Check for CHARACTER with no length parameter. */
2743 if (ts
.type
== BT_CHARACTER
&& !ts
.u
.cl
)
2745 ts
.kind
= gfc_default_character_kind
;
2746 ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2747 ts
.u
.cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
,
2751 /* Record the Successful match. */
2752 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2757 gfc_current_locus
= cur_loc
;
2760 /* Discard the (incorrectly) matched range. */
2761 gfc_clear_new_implicit ();
2763 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2764 if (ts
.type
== BT_CHARACTER
)
2765 m
= gfc_match_char_spec (&ts
);
2768 m
= gfc_match_kind_spec (&ts
, false);
2771 m
= gfc_match_old_kind_spec (&ts
);
2772 if (m
== MATCH_ERROR
)
2778 if (m
== MATCH_ERROR
)
2781 m
= match_implicit_range ();
2782 if (m
== MATCH_ERROR
)
2787 gfc_gobble_whitespace ();
2788 c
= gfc_next_ascii_char ();
2789 if ((c
!= '\n') && (c
!= ','))
2792 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2800 gfc_syntax_error (ST_IMPLICIT
);
2808 gfc_match_import (void)
2810 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2815 if (gfc_current_ns
->proc_name
== NULL
2816 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
2818 gfc_error ("IMPORT statement at %C only permitted in "
2819 "an INTERFACE body");
2823 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IMPORT statement at %C")
2827 if (gfc_match_eos () == MATCH_YES
)
2829 /* All host variables should be imported. */
2830 gfc_current_ns
->has_import_set
= 1;
2834 if (gfc_match (" ::") == MATCH_YES
)
2836 if (gfc_match_eos () == MATCH_YES
)
2838 gfc_error ("Expecting list of named entities at %C");
2845 m
= gfc_match (" %n", name
);
2849 if (gfc_current_ns
->parent
!= NULL
2850 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
2852 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2855 else if (gfc_current_ns
->proc_name
->ns
->parent
!= NULL
2856 && gfc_find_symbol (name
,
2857 gfc_current_ns
->proc_name
->ns
->parent
,
2860 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2866 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2867 "at %C - does not exist.", name
);
2871 if (gfc_find_symtree (gfc_current_ns
->sym_root
,name
))
2873 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2878 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, sym
->name
);
2881 sym
->attr
.imported
= 1;
2893 if (gfc_match_eos () == MATCH_YES
)
2895 if (gfc_match_char (',') != MATCH_YES
)
2902 gfc_error ("Syntax error in IMPORT statement at %C");
2907 /* A minimal implementation of gfc_match without whitespace, escape
2908 characters or variable arguments. Returns true if the next
2909 characters match the TARGET template exactly. */
2912 match_string_p (const char *target
)
2916 for (p
= target
; *p
; p
++)
2917 if ((char) gfc_next_ascii_char () != *p
)
2922 /* Matches an attribute specification including array specs. If
2923 successful, leaves the variables current_attr and current_as
2924 holding the specification. Also sets the colon_seen variable for
2925 later use by matchers associated with initializations.
2927 This subroutine is a little tricky in the sense that we don't know
2928 if we really have an attr-spec until we hit the double colon.
2929 Until that time, we can only return MATCH_NO. This forces us to
2930 check for duplicate specification at this level. */
2933 match_attr_spec (void)
2935 /* Modifiers that can exist in a type statement. */
2937 { GFC_DECL_BEGIN
= 0,
2938 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
2939 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
2940 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
2941 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
2942 DECL_IS_BIND_C
, DECL_CODIMENSION
, DECL_ASYNCHRONOUS
, DECL_CONTIGUOUS
,
2943 DECL_NONE
, GFC_DECL_END
/* Sentinel */
2947 /* GFC_DECL_END is the sentinel, index starts at 0. */
2948 #define NUM_DECL GFC_DECL_END
2950 locus start
, seen_at
[NUM_DECL
];
2957 gfc_clear_attr (¤t_attr
);
2958 start
= gfc_current_locus
;
2963 /* See if we get all of the keywords up to the final double colon. */
2964 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
2972 gfc_gobble_whitespace ();
2974 ch
= gfc_next_ascii_char ();
2977 /* This is the successful exit condition for the loop. */
2978 if (gfc_next_ascii_char () == ':')
2983 gfc_gobble_whitespace ();
2984 switch (gfc_peek_ascii_char ())
2987 gfc_next_ascii_char ();
2988 switch (gfc_next_ascii_char ())
2991 if (match_string_p ("locatable"))
2993 /* Matched "allocatable". */
2994 d
= DECL_ALLOCATABLE
;
2999 if (match_string_p ("ynchronous"))
3001 /* Matched "asynchronous". */
3002 d
= DECL_ASYNCHRONOUS
;
3009 /* Try and match the bind(c). */
3010 m
= gfc_match_bind_c (NULL
, true);
3013 else if (m
== MATCH_ERROR
)
3018 gfc_next_ascii_char ();
3019 if ('o' != gfc_next_ascii_char ())
3021 switch (gfc_next_ascii_char ())
3024 if (match_string_p ("imension"))
3026 d
= DECL_CODIMENSION
;
3030 if (match_string_p ("tiguous"))
3032 d
= DECL_CONTIGUOUS
;
3039 if (match_string_p ("dimension"))
3044 if (match_string_p ("external"))
3049 if (match_string_p ("int"))
3051 ch
= gfc_next_ascii_char ();
3054 if (match_string_p ("nt"))
3056 /* Matched "intent". */
3057 /* TODO: Call match_intent_spec from here. */
3058 if (gfc_match (" ( in out )") == MATCH_YES
)
3060 else if (gfc_match (" ( in )") == MATCH_YES
)
3062 else if (gfc_match (" ( out )") == MATCH_YES
)
3068 if (match_string_p ("insic"))
3070 /* Matched "intrinsic". */
3078 if (match_string_p ("optional"))
3083 gfc_next_ascii_char ();
3084 switch (gfc_next_ascii_char ())
3087 if (match_string_p ("rameter"))
3089 /* Matched "parameter". */
3095 if (match_string_p ("inter"))
3097 /* Matched "pointer". */
3103 ch
= gfc_next_ascii_char ();
3106 if (match_string_p ("vate"))
3108 /* Matched "private". */
3114 if (match_string_p ("tected"))
3116 /* Matched "protected". */
3123 if (match_string_p ("blic"))
3125 /* Matched "public". */
3133 if (match_string_p ("save"))
3138 if (match_string_p ("target"))
3143 gfc_next_ascii_char ();
3144 ch
= gfc_next_ascii_char ();
3147 if (match_string_p ("lue"))
3149 /* Matched "value". */
3155 if (match_string_p ("latile"))
3157 /* Matched "volatile". */
3165 /* No double colon and no recognizable decl_type, so assume that
3166 we've been looking at something else the whole time. */
3173 /* Check to make sure any parens are paired up correctly. */
3174 if (gfc_match_parens () == MATCH_ERROR
)
3181 seen_at
[d
] = gfc_current_locus
;
3183 if (d
== DECL_DIMENSION
|| d
== DECL_CODIMENSION
)
3185 gfc_array_spec
*as
= NULL
;
3187 m
= gfc_match_array_spec (&as
, d
== DECL_DIMENSION
,
3188 d
== DECL_CODIMENSION
);
3190 if (current_as
== NULL
)
3192 else if (m
== MATCH_YES
)
3194 merge_array_spec (as
, current_as
, false);
3200 if (d
== DECL_CODIMENSION
)
3201 gfc_error ("Missing codimension specification at %C");
3203 gfc_error ("Missing dimension specification at %C");
3207 if (m
== MATCH_ERROR
)
3212 /* Since we've seen a double colon, we have to be looking at an
3213 attr-spec. This means that we can now issue errors. */
3214 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3219 case DECL_ALLOCATABLE
:
3220 attr
= "ALLOCATABLE";
3222 case DECL_ASYNCHRONOUS
:
3223 attr
= "ASYNCHRONOUS";
3225 case DECL_CODIMENSION
:
3226 attr
= "CODIMENSION";
3228 case DECL_CONTIGUOUS
:
3229 attr
= "CONTIGUOUS";
3231 case DECL_DIMENSION
:
3238 attr
= "INTENT (IN)";
3241 attr
= "INTENT (OUT)";
3244 attr
= "INTENT (IN OUT)";
3246 case DECL_INTRINSIC
:
3252 case DECL_PARAMETER
:
3258 case DECL_PROTECTED
:
3273 case DECL_IS_BIND_C
:
3283 attr
= NULL
; /* This shouldn't happen. */
3286 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3291 /* Now that we've dealt with duplicate attributes, add the attributes
3292 to the current attribute. */
3293 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3298 if (gfc_current_state () == COMP_DERIVED
3299 && d
!= DECL_DIMENSION
&& d
!= DECL_CODIMENSION
3300 && d
!= DECL_POINTER
&& d
!= DECL_PRIVATE
3301 && d
!= DECL_PUBLIC
&& d
!= DECL_CONTIGUOUS
&& d
!= DECL_NONE
)
3303 if (d
== DECL_ALLOCATABLE
)
3305 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ALLOCATABLE "
3306 "attribute at %C in a TYPE definition")
3315 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3322 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3323 && gfc_current_state () != COMP_MODULE
)
3325 if (d
== DECL_PRIVATE
)
3329 if (gfc_current_state () == COMP_DERIVED
3330 && gfc_state_stack
->previous
3331 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3333 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Attribute %s "
3334 "at %L in a TYPE definition", attr
,
3344 gfc_error ("%s attribute at %L is not allowed outside of the "
3345 "specification part of a module", attr
, &seen_at
[d
]);
3353 case DECL_ALLOCATABLE
:
3354 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3357 case DECL_ASYNCHRONOUS
:
3358 if (gfc_notify_std (GFC_STD_F2003
,
3359 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3363 t
= gfc_add_asynchronous (¤t_attr
, NULL
, &seen_at
[d
]);
3366 case DECL_CODIMENSION
:
3367 t
= gfc_add_codimension (¤t_attr
, NULL
, &seen_at
[d
]);
3370 case DECL_CONTIGUOUS
:
3371 if (gfc_notify_std (GFC_STD_F2008
,
3372 "Fortran 2008: CONTIGUOUS attribute at %C")
3376 t
= gfc_add_contiguous (¤t_attr
, NULL
, &seen_at
[d
]);
3379 case DECL_DIMENSION
:
3380 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3384 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3388 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3392 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3396 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3399 case DECL_INTRINSIC
:
3400 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3404 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3407 case DECL_PARAMETER
:
3408 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3412 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3415 case DECL_PROTECTED
:
3416 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3418 gfc_error ("PROTECTED at %C only allowed in specification "
3419 "part of a module");
3424 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED "
3429 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3433 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3438 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3443 t
= gfc_add_save (¤t_attr
, NULL
, &seen_at
[d
]);
3447 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3450 case DECL_IS_BIND_C
:
3451 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3455 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE attribute "
3460 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3464 if (gfc_notify_std (GFC_STD_F2003
,
3465 "Fortran 2003: VOLATILE attribute at %C")
3469 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3473 gfc_internal_error ("match_attr_spec(): Bad attribute");
3487 gfc_current_locus
= start
;
3488 gfc_free_array_spec (current_as
);
3494 /* Set the binding label, dest_label, either with the binding label
3495 stored in the given gfc_typespec, ts, or if none was provided, it
3496 will be the symbol name in all lower case, as required by the draft
3497 (J3/04-007, section 15.4.1). If a binding label was given and
3498 there is more than one argument (num_idents), it is an error. */
3501 set_binding_label (char *dest_label
, const char *sym_name
, int num_idents
)
3503 if (num_idents
> 1 && has_name_equals
)
3505 gfc_error ("Multiple identifiers provided with "
3506 "single NAME= specifier at %C");
3510 if (curr_binding_label
[0] != '\0')
3512 /* Binding label given; store in temp holder til have sym. */
3513 strcpy (dest_label
, curr_binding_label
);
3517 /* No binding label given, and the NAME= specifier did not exist,
3518 which means there was no NAME="". */
3519 if (sym_name
!= NULL
&& has_name_equals
== 0)
3520 strcpy (dest_label
, sym_name
);
3527 /* Set the status of the given common block as being BIND(C) or not,
3528 depending on the given parameter, is_bind_c. */
3531 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3533 com_block
->is_bind_c
= is_bind_c
;
3538 /* Verify that the given gfc_typespec is for a C interoperable type. */
3541 verify_c_interop (gfc_typespec
*ts
)
3543 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
!= NULL
)
3544 return (ts
->u
.derived
->ts
.is_c_interop
? SUCCESS
: FAILURE
);
3545 else if (ts
->is_c_interop
!= 1)
3552 /* Verify that the variables of a given common block, which has been
3553 defined with the attribute specifier bind(c), to be of a C
3554 interoperable type. Errors will be reported here, if
3558 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3560 gfc_symbol
*curr_sym
= NULL
;
3561 gfc_try retval
= SUCCESS
;
3563 curr_sym
= com_block
->head
;
3565 /* Make sure we have at least one symbol. */
3566 if (curr_sym
== NULL
)
3569 /* Here we know we have a symbol, so we'll execute this loop
3573 /* The second to last param, 1, says this is in a common block. */
3574 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
3575 curr_sym
= curr_sym
->common_next
;
3576 } while (curr_sym
!= NULL
);
3582 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3583 an appropriate error message is reported. */
3586 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
3587 int is_in_common
, gfc_common_head
*com_block
)
3589 bool bind_c_function
= false;
3590 gfc_try retval
= SUCCESS
;
3592 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
3593 bind_c_function
= true;
3595 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
3597 tmp_sym
= tmp_sym
->result
;
3598 /* Make sure it wasn't an implicitly typed result. */
3599 if (tmp_sym
->attr
.implicit_type
)
3601 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3602 "%L may not be C interoperable", tmp_sym
->name
,
3603 &tmp_sym
->declared_at
);
3604 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
3605 /* Mark it as C interoperable to prevent duplicate warnings. */
3606 tmp_sym
->ts
.is_c_interop
= 1;
3607 tmp_sym
->attr
.is_c_interop
= 1;
3611 /* Here, we know we have the bind(c) attribute, so if we have
3612 enough type info, then verify that it's a C interop kind.
3613 The info could be in the symbol already, or possibly still in
3614 the given ts (current_ts), so look in both. */
3615 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
3617 if (verify_c_interop (&(tmp_sym
->ts
)) != SUCCESS
)
3619 /* See if we're dealing with a sym in a common block or not. */
3620 if (is_in_common
== 1)
3622 gfc_warning ("Variable '%s' in common block '%s' at %L "
3623 "may not be a C interoperable "
3624 "kind though common block '%s' is BIND(C)",
3625 tmp_sym
->name
, com_block
->name
,
3626 &(tmp_sym
->declared_at
), com_block
->name
);
3630 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
3631 gfc_error ("Type declaration '%s' at %L is not C "
3632 "interoperable but it is BIND(C)",
3633 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3635 gfc_warning ("Variable '%s' at %L "
3636 "may not be a C interoperable "
3637 "kind but it is bind(c)",
3638 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3642 /* Variables declared w/in a common block can't be bind(c)
3643 since there's no way for C to see these variables, so there's
3644 semantically no reason for the attribute. */
3645 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
3647 gfc_error ("Variable '%s' in common block '%s' at "
3648 "%L cannot be declared with BIND(C) "
3649 "since it is not a global",
3650 tmp_sym
->name
, com_block
->name
,
3651 &(tmp_sym
->declared_at
));
3655 /* Scalar variables that are bind(c) can not have the pointer
3656 or allocatable attributes. */
3657 if (tmp_sym
->attr
.is_bind_c
== 1)
3659 if (tmp_sym
->attr
.pointer
== 1)
3661 gfc_error ("Variable '%s' at %L cannot have both the "
3662 "POINTER and BIND(C) attributes",
3663 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3667 if (tmp_sym
->attr
.allocatable
== 1)
3669 gfc_error ("Variable '%s' at %L cannot have both the "
3670 "ALLOCATABLE and BIND(C) attributes",
3671 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3677 /* If it is a BIND(C) function, make sure the return value is a
3678 scalar value. The previous tests in this function made sure
3679 the type is interoperable. */
3680 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
3681 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3682 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
3684 /* BIND(C) functions can not return a character string. */
3685 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
3686 if (tmp_sym
->ts
.u
.cl
== NULL
|| tmp_sym
->ts
.u
.cl
->length
== NULL
3687 || tmp_sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
3688 || mpz_cmp_si (tmp_sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
3689 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3690 "be a character string", tmp_sym
->name
,
3691 &(tmp_sym
->declared_at
));
3694 /* See if the symbol has been marked as private. If it has, make sure
3695 there is no binding label and warn the user if there is one. */
3696 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
3697 && tmp_sym
->binding_label
[0] != '\0')
3698 /* Use gfc_warning_now because we won't say that the symbol fails
3699 just because of this. */
3700 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3701 "given the binding label '%s'", tmp_sym
->name
,
3702 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
3708 /* Set the appropriate fields for a symbol that's been declared as
3709 BIND(C) (the is_bind_c flag and the binding label), and verify that
3710 the type is C interoperable. Errors are reported by the functions
3711 used to set/test these fields. */
3714 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
3716 gfc_try retval
= SUCCESS
;
3718 /* TODO: Do we need to make sure the vars aren't marked private? */
3720 /* Set the is_bind_c bit in symbol_attribute. */
3721 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
3723 if (set_binding_label (tmp_sym
->binding_label
, tmp_sym
->name
,
3724 num_idents
) != SUCCESS
)
3731 /* Set the fields marking the given common block as BIND(C), including
3732 a binding label, and report any errors encountered. */
3735 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
3737 gfc_try retval
= SUCCESS
;
3739 /* destLabel, common name, typespec (which may have binding label). */
3740 if (set_binding_label (com_block
->binding_label
, com_block
->name
, num_idents
)
3744 /* Set the given common block (com_block) to being bind(c) (1). */
3745 set_com_block_bind_c (com_block
, 1);
3751 /* Retrieve the list of one or more identifiers that the given bind(c)
3752 attribute applies to. */
3755 get_bind_c_idents (void)
3757 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3759 gfc_symbol
*tmp_sym
= NULL
;
3761 gfc_common_head
*com_block
= NULL
;
3763 if (gfc_match_name (name
) == MATCH_YES
)
3765 found_id
= MATCH_YES
;
3766 gfc_get_ha_symbol (name
, &tmp_sym
);
3768 else if (match_common_name (name
) == MATCH_YES
)
3770 found_id
= MATCH_YES
;
3771 com_block
= gfc_get_common (name
, 0);
3775 gfc_error ("Need either entity or common block name for "
3776 "attribute specification statement at %C");
3780 /* Save the current identifier and look for more. */
3783 /* Increment the number of identifiers found for this spec stmt. */
3786 /* Make sure we have a sym or com block, and verify that it can
3787 be bind(c). Set the appropriate field(s) and look for more
3789 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
3791 if (tmp_sym
!= NULL
)
3793 if (set_verify_bind_c_sym (tmp_sym
, num_idents
)
3799 if (set_verify_bind_c_com_block(com_block
, num_idents
)
3804 /* Look to see if we have another identifier. */
3806 if (gfc_match_eos () == MATCH_YES
)
3807 found_id
= MATCH_NO
;
3808 else if (gfc_match_char (',') != MATCH_YES
)
3809 found_id
= MATCH_NO
;
3810 else if (gfc_match_name (name
) == MATCH_YES
)
3812 found_id
= MATCH_YES
;
3813 gfc_get_ha_symbol (name
, &tmp_sym
);
3815 else if (match_common_name (name
) == MATCH_YES
)
3817 found_id
= MATCH_YES
;
3818 com_block
= gfc_get_common (name
, 0);
3822 gfc_error ("Missing entity or common block name for "
3823 "attribute specification statement at %C");
3829 gfc_internal_error ("Missing symbol");
3831 } while (found_id
== MATCH_YES
);
3833 /* if we get here we were successful */
3838 /* Try and match a BIND(C) attribute specification statement. */
3841 gfc_match_bind_c_stmt (void)
3843 match found_match
= MATCH_NO
;
3848 /* This may not be necessary. */
3850 /* Clear the temporary binding label holder. */
3851 curr_binding_label
[0] = '\0';
3853 /* Look for the bind(c). */
3854 found_match
= gfc_match_bind_c (NULL
, true);
3856 if (found_match
== MATCH_YES
)
3858 /* Look for the :: now, but it is not required. */
3861 /* Get the identifier(s) that needs to be updated. This may need to
3862 change to hand the flag(s) for the attr specified so all identifiers
3863 found can have all appropriate parts updated (assuming that the same
3864 spec stmt can have multiple attrs, such as both bind(c) and
3866 if (get_bind_c_idents () != SUCCESS
)
3867 /* Error message should have printed already. */
3875 /* Match a data declaration statement. */
3878 gfc_match_data_decl (void)
3884 num_idents_on_line
= 0;
3886 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
3890 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
3891 && gfc_current_state () != COMP_DERIVED
)
3893 sym
= gfc_use_derived (current_ts
.u
.derived
);
3901 current_ts
.u
.derived
= sym
;
3904 m
= match_attr_spec ();
3905 if (m
== MATCH_ERROR
)
3911 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
3912 && current_ts
.u
.derived
->components
== NULL
3913 && !current_ts
.u
.derived
->attr
.zero_comp
)
3916 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
3919 gfc_find_symbol (current_ts
.u
.derived
->name
,
3920 current_ts
.u
.derived
->ns
->parent
, 1, &sym
);
3922 /* Any symbol that we find had better be a type definition
3923 which has its components defined. */
3924 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
3925 && (current_ts
.u
.derived
->components
!= NULL
3926 || current_ts
.u
.derived
->attr
.zero_comp
))
3929 /* Now we have an error, which we signal, and then fix up
3930 because the knock-on is plain and simple confusing. */
3931 gfc_error_now ("Derived type at %C has not been previously defined "
3932 "and so cannot appear in a derived type definition");
3933 current_attr
.pointer
= 1;
3938 /* If we have an old-style character declaration, and no new-style
3939 attribute specifications, then there a comma is optional between
3940 the type specification and the variable list. */
3941 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
3942 gfc_match_char (',');
3944 /* Give the types/attributes to symbols that follow. Give the element
3945 a number so that repeat character length expressions can be copied. */
3949 num_idents_on_line
++;
3950 m
= variable_decl (elem
++);
3951 if (m
== MATCH_ERROR
)
3956 if (gfc_match_eos () == MATCH_YES
)
3958 if (gfc_match_char (',') != MATCH_YES
)
3962 if (gfc_error_flag_test () == 0)
3963 gfc_error ("Syntax error in data declaration at %C");
3966 gfc_free_data_all (gfc_current_ns
);
3969 gfc_free_array_spec (current_as
);
3975 /* Match a prefix associated with a function or subroutine
3976 declaration. If the typespec pointer is nonnull, then a typespec
3977 can be matched. Note that if nothing matches, MATCH_YES is
3978 returned (the null string was matched). */
3981 gfc_match_prefix (gfc_typespec
*ts
)
3985 gfc_clear_attr (¤t_attr
);
3988 gcc_assert (!gfc_matching_prefix
);
3989 gfc_matching_prefix
= true;
3992 if (!seen_type
&& ts
!= NULL
3993 && gfc_match_decl_type_spec (ts
, 0) == MATCH_YES
3994 && gfc_match_space () == MATCH_YES
)
4001 if (gfc_match ("elemental% ") == MATCH_YES
)
4003 if (gfc_add_elemental (¤t_attr
, NULL
) == FAILURE
)
4009 if (gfc_match ("pure% ") == MATCH_YES
)
4011 if (gfc_add_pure (¤t_attr
, NULL
) == FAILURE
)
4017 if (gfc_match ("recursive% ") == MATCH_YES
)
4019 if (gfc_add_recursive (¤t_attr
, NULL
) == FAILURE
)
4025 /* At this point, the next item is not a prefix. */
4026 gcc_assert (gfc_matching_prefix
);
4027 gfc_matching_prefix
= false;
4031 gcc_assert (gfc_matching_prefix
);
4032 gfc_matching_prefix
= false;
4037 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
4040 copy_prefix (symbol_attribute
*dest
, locus
*where
)
4042 if (current_attr
.pure
&& gfc_add_pure (dest
, where
) == FAILURE
)
4045 if (current_attr
.elemental
&& gfc_add_elemental (dest
, where
) == FAILURE
)
4048 if (current_attr
.recursive
&& gfc_add_recursive (dest
, where
) == FAILURE
)
4055 /* Match a formal argument list. */
4058 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
4060 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
4061 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4067 if (gfc_match_char ('(') != MATCH_YES
)
4074 if (gfc_match_char (')') == MATCH_YES
)
4079 if (gfc_match_char ('*') == MATCH_YES
)
4083 m
= gfc_match_name (name
);
4087 if (gfc_get_symbol (name
, NULL
, &sym
))
4091 p
= gfc_get_formal_arglist ();
4103 /* We don't add the VARIABLE flavor because the name could be a
4104 dummy procedure. We don't apply these attributes to formal
4105 arguments of statement functions. */
4106 if (sym
!= NULL
&& !st_flag
4107 && (gfc_add_dummy (&sym
->attr
, sym
->name
, NULL
) == FAILURE
4108 || gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
))
4114 /* The name of a program unit can be in a different namespace,
4115 so check for it explicitly. After the statement is accepted,
4116 the name is checked for especially in gfc_get_symbol(). */
4117 if (gfc_new_block
!= NULL
&& sym
!= NULL
4118 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
4120 gfc_error ("Name '%s' at %C is the name of the procedure",
4126 if (gfc_match_char (')') == MATCH_YES
)
4129 m
= gfc_match_char (',');
4132 gfc_error ("Unexpected junk in formal argument list at %C");
4138 /* Check for duplicate symbols in the formal argument list. */
4141 for (p
= head
; p
->next
; p
= p
->next
)
4146 for (q
= p
->next
; q
; q
= q
->next
)
4147 if (p
->sym
== q
->sym
)
4149 gfc_error ("Duplicate symbol '%s' in formal argument list "
4150 "at %C", p
->sym
->name
);
4158 if (gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
)
4168 gfc_free_formal_arglist (head
);
4173 /* Match a RESULT specification following a function declaration or
4174 ENTRY statement. Also matches the end-of-statement. */
4177 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
4179 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4183 if (gfc_match (" result (") != MATCH_YES
)
4186 m
= gfc_match_name (name
);
4190 /* Get the right paren, and that's it because there could be the
4191 bind(c) attribute after the result clause. */
4192 if (gfc_match_char(')') != MATCH_YES
)
4194 /* TODO: should report the missing right paren here. */
4198 if (strcmp (function
->name
, name
) == 0)
4200 gfc_error ("RESULT variable at %C must be different than function name");
4204 if (gfc_get_symbol (name
, NULL
, &r
))
4207 if (gfc_add_result (&r
->attr
, r
->name
, NULL
) == FAILURE
)
4216 /* Match a function suffix, which could be a combination of a result
4217 clause and BIND(C), either one, or neither. The draft does not
4218 require them to come in a specific order. */
4221 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4223 match is_bind_c
; /* Found bind(c). */
4224 match is_result
; /* Found result clause. */
4225 match found_match
; /* Status of whether we've found a good match. */
4226 char peek_char
; /* Character we're going to peek at. */
4227 bool allow_binding_name
;
4229 /* Initialize to having found nothing. */
4230 found_match
= MATCH_NO
;
4231 is_bind_c
= MATCH_NO
;
4232 is_result
= MATCH_NO
;
4234 /* Get the next char to narrow between result and bind(c). */
4235 gfc_gobble_whitespace ();
4236 peek_char
= gfc_peek_ascii_char ();
4238 /* C binding names are not allowed for internal procedures. */
4239 if (gfc_current_state () == COMP_CONTAINS
4240 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4241 allow_binding_name
= false;
4243 allow_binding_name
= true;
4248 /* Look for result clause. */
4249 is_result
= match_result (sym
, result
);
4250 if (is_result
== MATCH_YES
)
4252 /* Now see if there is a bind(c) after it. */
4253 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4254 /* We've found the result clause and possibly bind(c). */
4255 found_match
= MATCH_YES
;
4258 /* This should only be MATCH_ERROR. */
4259 found_match
= is_result
;
4262 /* Look for bind(c) first. */
4263 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4264 if (is_bind_c
== MATCH_YES
)
4266 /* Now see if a result clause followed it. */
4267 is_result
= match_result (sym
, result
);
4268 found_match
= MATCH_YES
;
4272 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4273 found_match
= MATCH_ERROR
;
4277 gfc_error ("Unexpected junk after function declaration at %C");
4278 found_match
= MATCH_ERROR
;
4282 if (is_bind_c
== MATCH_YES
)
4284 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4285 if (gfc_current_state () == COMP_CONTAINS
4286 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4287 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
4288 "at %L may not be specified for an internal "
4289 "procedure", &gfc_current_locus
)
4293 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1)
4302 /* Procedure pointer return value without RESULT statement:
4303 Add "hidden" result variable named "ppr@". */
4306 add_hidden_procptr_result (gfc_symbol
*sym
)
4310 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4313 /* First usage case: PROCEDURE and EXTERNAL statements. */
4314 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4315 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4316 && sym
->attr
.external
;
4317 /* Second usage case: INTERFACE statements. */
4318 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4319 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4320 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4326 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4330 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4331 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4332 st2
->n
.sym
= stree
->n
.sym
;
4334 sym
->result
= stree
->n
.sym
;
4336 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4337 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4338 sym
->result
->attr
.external
= sym
->attr
.external
;
4339 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4340 sym
->result
->ts
= sym
->ts
;
4341 sym
->attr
.proc_pointer
= 0;
4342 sym
->attr
.pointer
= 0;
4343 sym
->attr
.external
= 0;
4344 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4346 sym
->result
->attr
.pointer
= 0;
4347 sym
->result
->attr
.proc_pointer
= 1;
4350 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4352 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4353 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4354 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4355 && sym
== gfc_current_ns
->proc_name
4356 && sym
== sym
->result
->ns
->proc_name
4357 && strcmp ("ppr@", sym
->result
->name
) == 0)
4359 sym
->result
->attr
.proc_pointer
= 1;
4360 sym
->attr
.pointer
= 0;
4368 /* Match the interface for a PROCEDURE declaration,
4369 including brackets (R1212). */
4372 match_procedure_interface (gfc_symbol
**proc_if
)
4376 locus old_loc
, entry_loc
;
4377 gfc_namespace
*old_ns
= gfc_current_ns
;
4378 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4380 old_loc
= entry_loc
= gfc_current_locus
;
4381 gfc_clear_ts (¤t_ts
);
4383 if (gfc_match (" (") != MATCH_YES
)
4385 gfc_current_locus
= entry_loc
;
4389 /* Get the type spec. for the procedure interface. */
4390 old_loc
= gfc_current_locus
;
4391 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4392 gfc_gobble_whitespace ();
4393 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4396 if (m
== MATCH_ERROR
)
4399 /* Procedure interface is itself a procedure. */
4400 gfc_current_locus
= old_loc
;
4401 m
= gfc_match_name (name
);
4403 /* First look to see if it is already accessible in the current
4404 namespace because it is use associated or contained. */
4406 if (gfc_find_sym_tree (name
, NULL
, 0, &st
))
4409 /* If it is still not found, then try the parent namespace, if it
4410 exists and create the symbol there if it is still not found. */
4411 if (gfc_current_ns
->parent
)
4412 gfc_current_ns
= gfc_current_ns
->parent
;
4413 if (st
== NULL
&& gfc_get_ha_sym_tree (name
, &st
))
4416 gfc_current_ns
= old_ns
;
4417 *proc_if
= st
->n
.sym
;
4419 /* Various interface checks. */
4423 /* Resolve interface if possible. That way, attr.procedure is only set
4424 if it is declared by a later procedure-declaration-stmt, which is
4425 invalid per C1212. */
4426 while ((*proc_if
)->ts
.interface
)
4427 *proc_if
= (*proc_if
)->ts
.interface
;
4429 if ((*proc_if
)->generic
)
4431 gfc_error ("Interface '%s' at %C may not be generic",
4435 if ((*proc_if
)->attr
.proc
== PROC_ST_FUNCTION
)
4437 gfc_error ("Interface '%s' at %C may not be a statement function",
4441 /* Handle intrinsic procedures. */
4442 if (!((*proc_if
)->attr
.external
|| (*proc_if
)->attr
.use_assoc
4443 || (*proc_if
)->attr
.if_source
== IFSRC_IFBODY
)
4444 && (gfc_is_intrinsic ((*proc_if
), 0, gfc_current_locus
)
4445 || gfc_is_intrinsic ((*proc_if
), 1, gfc_current_locus
)))
4446 (*proc_if
)->attr
.intrinsic
= 1;
4447 if ((*proc_if
)->attr
.intrinsic
4448 && !gfc_intrinsic_actual_ok ((*proc_if
)->name
, 0))
4450 gfc_error ("Intrinsic procedure '%s' not allowed "
4451 "in PROCEDURE statement at %C", (*proc_if
)->name
);
4457 if (gfc_match (" )") != MATCH_YES
)
4459 gfc_current_locus
= entry_loc
;
4467 /* Match a PROCEDURE declaration (R1211). */
4470 match_procedure_decl (void)
4473 gfc_symbol
*sym
, *proc_if
= NULL
;
4475 gfc_expr
*initializer
= NULL
;
4477 /* Parse interface (with brackets). */
4478 m
= match_procedure_interface (&proc_if
);
4482 /* Parse attributes (with colons). */
4483 m
= match_attr_spec();
4484 if (m
== MATCH_ERROR
)
4487 /* Get procedure symbols. */
4490 m
= gfc_match_symbol (&sym
, 0);
4493 else if (m
== MATCH_ERROR
)
4496 /* Add current_attr to the symbol attributes. */
4497 if (gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4500 if (sym
->attr
.is_bind_c
)
4502 /* Check for C1218. */
4503 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4505 gfc_error ("BIND(C) attribute at %C requires "
4506 "an interface with BIND(C)");
4509 /* Check for C1217. */
4510 if (has_name_equals
&& sym
->attr
.pointer
)
4512 gfc_error ("BIND(C) procedure with NAME may not have "
4513 "POINTER attribute at %C");
4516 if (has_name_equals
&& sym
->attr
.dummy
)
4518 gfc_error ("Dummy procedure at %C may not have "
4519 "BIND(C) attribute with NAME");
4522 /* Set binding label for BIND(C). */
4523 if (set_binding_label (sym
->binding_label
, sym
->name
, num
) != SUCCESS
)
4527 if (gfc_add_external (&sym
->attr
, NULL
) == FAILURE
)
4530 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4533 if (gfc_add_proc (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4536 /* Set interface. */
4537 if (proc_if
!= NULL
)
4539 if (sym
->ts
.type
!= BT_UNKNOWN
)
4541 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4542 sym
->name
, &gfc_current_locus
,
4543 gfc_basic_typename (sym
->ts
.type
));
4546 sym
->ts
.interface
= proc_if
;
4547 sym
->attr
.untyped
= 1;
4548 sym
->attr
.if_source
= IFSRC_IFBODY
;
4550 else if (current_ts
.type
!= BT_UNKNOWN
)
4552 if (gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4554 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4555 sym
->ts
.interface
->ts
= current_ts
;
4556 sym
->ts
.interface
->attr
.function
= 1;
4557 sym
->attr
.function
= sym
->ts
.interface
->attr
.function
;
4558 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
4561 if (gfc_match (" =>") == MATCH_YES
)
4563 if (!current_attr
.pointer
)
4565 gfc_error ("Initialization at %C isn't for a pointer variable");
4570 m
= gfc_match_null (&initializer
);
4573 gfc_error ("Pointer initialization requires a NULL() at %C");
4577 if (gfc_pure (NULL
))
4579 gfc_error ("Initialization of pointer at %C is not allowed in "
4580 "a PURE procedure");
4587 if (add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
)
4593 gfc_set_sym_referenced (sym
);
4595 if (gfc_match_eos () == MATCH_YES
)
4597 if (gfc_match_char (',') != MATCH_YES
)
4602 gfc_error ("Syntax error in PROCEDURE statement at %C");
4606 /* Free stuff up and return. */
4607 gfc_free_expr (initializer
);
4613 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
4616 /* Match a procedure pointer component declaration (R445). */
4619 match_ppc_decl (void)
4622 gfc_symbol
*proc_if
= NULL
;
4626 gfc_expr
*initializer
= NULL
;
4627 gfc_typebound_proc
* tb
;
4628 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4630 /* Parse interface (with brackets). */
4631 m
= match_procedure_interface (&proc_if
);
4635 /* Parse attributes. */
4636 tb
= XCNEW (gfc_typebound_proc
);
4637 tb
->where
= gfc_current_locus
;
4638 m
= match_binding_attributes (tb
, false, true);
4639 if (m
== MATCH_ERROR
)
4642 gfc_clear_attr (¤t_attr
);
4643 current_attr
.procedure
= 1;
4644 current_attr
.proc_pointer
= 1;
4645 current_attr
.access
= tb
->access
;
4646 current_attr
.flavor
= FL_PROCEDURE
;
4648 /* Match the colons (required). */
4649 if (gfc_match (" ::") != MATCH_YES
)
4651 gfc_error ("Expected '::' after binding-attributes at %C");
4655 /* Check for C450. */
4656 if (!tb
->nopass
&& proc_if
== NULL
)
4658 gfc_error("NOPASS or explicit interface required at %C");
4662 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure pointer "
4663 "component at %C") == FAILURE
)
4666 /* Match PPC names. */
4670 m
= gfc_match_name (name
);
4673 else if (m
== MATCH_ERROR
)
4676 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
4679 /* Add current_attr to the symbol attributes. */
4680 if (gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4683 if (gfc_add_external (&c
->attr
, NULL
) == FAILURE
)
4686 if (gfc_add_proc (&c
->attr
, name
, NULL
) == FAILURE
)
4691 /* Set interface. */
4692 if (proc_if
!= NULL
)
4694 c
->ts
.interface
= proc_if
;
4695 c
->attr
.untyped
= 1;
4696 c
->attr
.if_source
= IFSRC_IFBODY
;
4698 else if (ts
.type
!= BT_UNKNOWN
)
4701 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4702 c
->ts
.interface
->ts
= ts
;
4703 c
->ts
.interface
->attr
.function
= 1;
4704 c
->attr
.function
= c
->ts
.interface
->attr
.function
;
4705 c
->attr
.if_source
= IFSRC_UNKNOWN
;
4708 if (gfc_match (" =>") == MATCH_YES
)
4710 m
= gfc_match_null (&initializer
);
4713 gfc_error ("Pointer initialization requires a NULL() at %C");
4716 if (gfc_pure (NULL
))
4718 gfc_error ("Initialization of pointer at %C is not allowed in "
4719 "a PURE procedure");
4724 gfc_free_expr (initializer
);
4727 c
->initializer
= initializer
;
4730 if (gfc_match_eos () == MATCH_YES
)
4732 if (gfc_match_char (',') != MATCH_YES
)
4737 gfc_error ("Syntax error in procedure pointer component at %C");
4742 /* Match a PROCEDURE declaration inside an interface (R1206). */
4745 match_procedure_in_interface (void)
4749 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4751 if (current_interface
.type
== INTERFACE_NAMELESS
4752 || current_interface
.type
== INTERFACE_ABSTRACT
)
4754 gfc_error ("PROCEDURE at %C must be in a generic interface");
4760 m
= gfc_match_name (name
);
4763 else if (m
== MATCH_ERROR
)
4765 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
4768 if (gfc_add_interface (sym
) == FAILURE
)
4771 if (gfc_match_eos () == MATCH_YES
)
4773 if (gfc_match_char (',') != MATCH_YES
)
4780 gfc_error ("Syntax error in PROCEDURE statement at %C");
4785 /* General matcher for PROCEDURE declarations. */
4787 static match
match_procedure_in_type (void);
4790 gfc_match_procedure (void)
4794 switch (gfc_current_state ())
4799 case COMP_SUBROUTINE
:
4801 m
= match_procedure_decl ();
4803 case COMP_INTERFACE
:
4804 m
= match_procedure_in_interface ();
4807 m
= match_ppc_decl ();
4809 case COMP_DERIVED_CONTAINS
:
4810 m
= match_procedure_in_type ();
4819 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROCEDURE statement at %C")
4827 /* Warn if a matched procedure has the same name as an intrinsic; this is
4828 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4829 parser-state-stack to find out whether we're in a module. */
4832 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
4836 in_module
= (gfc_state_stack
->previous
4837 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
4839 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
4843 /* Match a function declaration. */
4846 gfc_match_function_decl (void)
4848 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4849 gfc_symbol
*sym
, *result
;
4853 match found_match
; /* Status returned by match func. */
4855 if (gfc_current_state () != COMP_NONE
4856 && gfc_current_state () != COMP_INTERFACE
4857 && gfc_current_state () != COMP_CONTAINS
)
4860 gfc_clear_ts (¤t_ts
);
4862 old_loc
= gfc_current_locus
;
4864 m
= gfc_match_prefix (¤t_ts
);
4867 gfc_current_locus
= old_loc
;
4871 if (gfc_match ("function% %n", name
) != MATCH_YES
)
4873 gfc_current_locus
= old_loc
;
4876 if (get_proc_name (name
, &sym
, false))
4879 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4882 gfc_new_block
= sym
;
4884 m
= gfc_match_formal_arglist (sym
, 0, 0);
4887 gfc_error ("Expected formal argument list in function "
4888 "definition at %C");
4892 else if (m
== MATCH_ERROR
)
4897 /* According to the draft, the bind(c) and result clause can
4898 come in either order after the formal_arg_list (i.e., either
4899 can be first, both can exist together or by themselves or neither
4900 one). Therefore, the match_result can't match the end of the
4901 string, and check for the bind(c) or result clause in either order. */
4902 found_match
= gfc_match_eos ();
4904 /* Make sure that it isn't already declared as BIND(C). If it is, it
4905 must have been marked BIND(C) with a BIND(C) attribute and that is
4906 not allowed for procedures. */
4907 if (sym
->attr
.is_bind_c
== 1)
4909 sym
->attr
.is_bind_c
= 0;
4910 if (sym
->old_symbol
!= NULL
)
4911 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4912 "variables or common blocks",
4913 &(sym
->old_symbol
->declared_at
));
4915 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4916 "variables or common blocks", &gfc_current_locus
);
4919 if (found_match
!= MATCH_YES
)
4921 /* If we haven't found the end-of-statement, look for a suffix. */
4922 suffix_match
= gfc_match_suffix (sym
, &result
);
4923 if (suffix_match
== MATCH_YES
)
4924 /* Need to get the eos now. */
4925 found_match
= gfc_match_eos ();
4927 found_match
= suffix_match
;
4930 if(found_match
!= MATCH_YES
)
4934 /* Make changes to the symbol. */
4937 if (gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4940 if (gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
4941 || copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
4944 /* Delay matching the function characteristics until after the
4945 specification block by signalling kind=-1. */
4946 sym
->declared_at
= old_loc
;
4947 if (current_ts
.type
!= BT_UNKNOWN
)
4948 current_ts
.kind
= -1;
4950 current_ts
.kind
= 0;
4954 if (current_ts
.type
!= BT_UNKNOWN
4955 && gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4961 if (current_ts
.type
!= BT_UNKNOWN
4962 && gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
)
4965 sym
->result
= result
;
4968 /* Warn if this procedure has the same name as an intrinsic. */
4969 warn_intrinsic_shadow (sym
, true);
4975 gfc_current_locus
= old_loc
;
4980 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4981 pass the name of the entry, rather than the gfc_current_block name, and
4982 to return false upon finding an existing global entry. */
4985 add_global_entry (const char *name
, int sub
)
4988 enum gfc_symbol_type type
;
4990 s
= gfc_get_gsymbol(name
);
4991 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
4994 || (s
->type
!= GSYM_UNKNOWN
4995 && s
->type
!= type
))
4996 gfc_global_used(s
, NULL
);
5000 s
->where
= gfc_current_locus
;
5002 s
->ns
= gfc_current_ns
;
5009 /* Match an ENTRY statement. */
5012 gfc_match_entry (void)
5017 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5018 gfc_compile_state state
;
5022 bool module_procedure
;
5026 m
= gfc_match_name (name
);
5030 if (gfc_notify_std (GFC_STD_F2008_OBS
, "Fortran 2008 obsolescent feature: "
5031 "ENTRY statement at %C") == FAILURE
)
5034 state
= gfc_current_state ();
5035 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
5040 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
5043 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
5045 case COMP_BLOCK_DATA
:
5046 gfc_error ("ENTRY statement at %C cannot appear within "
5049 case COMP_INTERFACE
:
5050 gfc_error ("ENTRY statement at %C cannot appear within "
5054 gfc_error ("ENTRY statement at %C cannot appear within "
5055 "a DERIVED TYPE block");
5058 gfc_error ("ENTRY statement at %C cannot appear within "
5059 "an IF-THEN block");
5062 gfc_error ("ENTRY statement at %C cannot appear within "
5066 gfc_error ("ENTRY statement at %C cannot appear within "
5070 gfc_error ("ENTRY statement at %C cannot appear within "
5074 gfc_error ("ENTRY statement at %C cannot appear within "
5078 gfc_error ("ENTRY statement at %C cannot appear within "
5079 "a contained subprogram");
5082 gfc_internal_error ("gfc_match_entry(): Bad state");
5087 module_procedure
= gfc_current_ns
->parent
!= NULL
5088 && gfc_current_ns
->parent
->proc_name
5089 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
5092 if (gfc_current_ns
->parent
!= NULL
5093 && gfc_current_ns
->parent
->proc_name
5094 && !module_procedure
)
5096 gfc_error("ENTRY statement at %C cannot appear in a "
5097 "contained procedure");
5101 /* Module function entries need special care in get_proc_name
5102 because previous references within the function will have
5103 created symbols attached to the current namespace. */
5104 if (get_proc_name (name
, &entry
,
5105 gfc_current_ns
->parent
!= NULL
5106 && module_procedure
))
5109 proc
= gfc_current_block ();
5111 /* Make sure that it isn't already declared as BIND(C). If it is, it
5112 must have been marked BIND(C) with a BIND(C) attribute and that is
5113 not allowed for procedures. */
5114 if (entry
->attr
.is_bind_c
== 1)
5116 entry
->attr
.is_bind_c
= 0;
5117 if (entry
->old_symbol
!= NULL
)
5118 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5119 "variables or common blocks",
5120 &(entry
->old_symbol
->declared_at
));
5122 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5123 "variables or common blocks", &gfc_current_locus
);
5126 /* Check what next non-whitespace character is so we can tell if there
5127 is the required parens if we have a BIND(C). */
5128 gfc_gobble_whitespace ();
5129 peek_char
= gfc_peek_ascii_char ();
5131 if (state
== COMP_SUBROUTINE
)
5133 /* An entry in a subroutine. */
5134 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 1))
5137 m
= gfc_match_formal_arglist (entry
, 0, 1);
5141 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5142 never be an internal procedure. */
5143 is_bind_c
= gfc_match_bind_c (entry
, true);
5144 if (is_bind_c
== MATCH_ERROR
)
5146 if (is_bind_c
== MATCH_YES
)
5148 if (peek_char
!= '(')
5150 gfc_error ("Missing required parentheses before BIND(C) at %C");
5153 if (gfc_add_is_bind_c (&(entry
->attr
), entry
->name
, &(entry
->declared_at
), 1)
5158 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5159 || gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5164 /* An entry in a function.
5165 We need to take special care because writing
5170 ENTRY f() RESULT (r)
5172 ENTRY f RESULT (r). */
5173 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 0))
5176 old_loc
= gfc_current_locus
;
5177 if (gfc_match_eos () == MATCH_YES
)
5179 gfc_current_locus
= old_loc
;
5180 /* Match the empty argument list, and add the interface to
5182 m
= gfc_match_formal_arglist (entry
, 0, 1);
5185 m
= gfc_match_formal_arglist (entry
, 0, 0);
5192 if (gfc_match_eos () == MATCH_YES
)
5194 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5195 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5198 entry
->result
= entry
;
5202 m
= gfc_match_suffix (entry
, &result
);
5204 gfc_syntax_error (ST_ENTRY
);
5210 if (gfc_add_result (&result
->attr
, result
->name
, NULL
) == FAILURE
5211 || gfc_add_entry (&entry
->attr
, result
->name
, NULL
) == FAILURE
5212 || gfc_add_function (&entry
->attr
, result
->name
, NULL
)
5215 entry
->result
= result
;
5219 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5220 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5222 entry
->result
= entry
;
5227 if (gfc_match_eos () != MATCH_YES
)
5229 gfc_syntax_error (ST_ENTRY
);
5233 entry
->attr
.recursive
= proc
->attr
.recursive
;
5234 entry
->attr
.elemental
= proc
->attr
.elemental
;
5235 entry
->attr
.pure
= proc
->attr
.pure
;
5237 el
= gfc_get_entry_list ();
5239 el
->next
= gfc_current_ns
->entries
;
5240 gfc_current_ns
->entries
= el
;
5242 el
->id
= el
->next
->id
+ 1;
5246 new_st
.op
= EXEC_ENTRY
;
5247 new_st
.ext
.entry
= el
;
5253 /* Match a subroutine statement, including optional prefixes. */
5256 gfc_match_subroutine (void)
5258 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5263 bool allow_binding_name
;
5265 if (gfc_current_state () != COMP_NONE
5266 && gfc_current_state () != COMP_INTERFACE
5267 && gfc_current_state () != COMP_CONTAINS
)
5270 m
= gfc_match_prefix (NULL
);
5274 m
= gfc_match ("subroutine% %n", name
);
5278 if (get_proc_name (name
, &sym
, false))
5281 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5282 the symbol existed before. */
5283 sym
->declared_at
= gfc_current_locus
;
5285 if (add_hidden_procptr_result (sym
) == SUCCESS
)
5288 gfc_new_block
= sym
;
5290 /* Check what next non-whitespace character is so we can tell if there
5291 is the required parens if we have a BIND(C). */
5292 gfc_gobble_whitespace ();
5293 peek_char
= gfc_peek_ascii_char ();
5295 if (gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
5298 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5301 /* Make sure that it isn't already declared as BIND(C). If it is, it
5302 must have been marked BIND(C) with a BIND(C) attribute and that is
5303 not allowed for procedures. */
5304 if (sym
->attr
.is_bind_c
== 1)
5306 sym
->attr
.is_bind_c
= 0;
5307 if (sym
->old_symbol
!= NULL
)
5308 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5309 "variables or common blocks",
5310 &(sym
->old_symbol
->declared_at
));
5312 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5313 "variables or common blocks", &gfc_current_locus
);
5316 /* C binding names are not allowed for internal procedures. */
5317 if (gfc_current_state () == COMP_CONTAINS
5318 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5319 allow_binding_name
= false;
5321 allow_binding_name
= true;
5323 /* Here, we are just checking if it has the bind(c) attribute, and if
5324 so, then we need to make sure it's all correct. If it doesn't,
5325 we still need to continue matching the rest of the subroutine line. */
5326 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5327 if (is_bind_c
== MATCH_ERROR
)
5329 /* There was an attempt at the bind(c), but it was wrong. An
5330 error message should have been printed w/in the gfc_match_bind_c
5331 so here we'll just return the MATCH_ERROR. */
5335 if (is_bind_c
== MATCH_YES
)
5337 /* The following is allowed in the Fortran 2008 draft. */
5338 if (gfc_current_state () == COMP_CONTAINS
5339 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5340 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
5341 "at %L may not be specified for an internal "
5342 "procedure", &gfc_current_locus
)
5346 if (peek_char
!= '(')
5348 gfc_error ("Missing required parentheses before BIND(C) at %C");
5351 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &(sym
->declared_at
), 1)
5356 if (gfc_match_eos () != MATCH_YES
)
5358 gfc_syntax_error (ST_SUBROUTINE
);
5362 if (copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
5365 /* Warn if it has the same name as an intrinsic. */
5366 warn_intrinsic_shadow (sym
, false);
5372 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5373 given, and set the binding label in either the given symbol (if not
5374 NULL), or in the current_ts. The symbol may be NULL because we may
5375 encounter the BIND(C) before the declaration itself. Return
5376 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5377 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5378 or MATCH_YES if the specifier was correct and the binding label and
5379 bind(c) fields were set correctly for the given symbol or the
5380 current_ts. If allow_binding_name is false, no binding name may be
5384 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5386 /* binding label, if exists */
5387 char binding_label
[GFC_MAX_SYMBOL_LEN
+ 1];
5391 /* Initialize the flag that specifies whether we encountered a NAME=
5392 specifier or not. */
5393 has_name_equals
= 0;
5395 /* Init the first char to nil so we can catch if we don't have
5396 the label (name attr) or the symbol name yet. */
5397 binding_label
[0] = '\0';
5399 /* This much we have to be able to match, in this order, if
5400 there is a bind(c) label. */
5401 if (gfc_match (" bind ( c ") != MATCH_YES
)
5404 /* Now see if there is a binding label, or if we've reached the
5405 end of the bind(c) attribute without one. */
5406 if (gfc_match_char (',') == MATCH_YES
)
5408 if (gfc_match (" name = ") != MATCH_YES
)
5410 gfc_error ("Syntax error in NAME= specifier for binding label "
5412 /* should give an error message here */
5416 has_name_equals
= 1;
5418 /* Get the opening quote. */
5419 double_quote
= MATCH_YES
;
5420 single_quote
= MATCH_YES
;
5421 double_quote
= gfc_match_char ('"');
5422 if (double_quote
!= MATCH_YES
)
5423 single_quote
= gfc_match_char ('\'');
5424 if (double_quote
!= MATCH_YES
&& single_quote
!= MATCH_YES
)
5426 gfc_error ("Syntax error in NAME= specifier for binding label "
5431 /* Grab the binding label, using functions that will not lower
5432 case the names automatically. */
5433 if (gfc_match_name_C (binding_label
) != MATCH_YES
)
5436 /* Get the closing quotation. */
5437 if (double_quote
== MATCH_YES
)
5439 if (gfc_match_char ('"') != MATCH_YES
)
5441 gfc_error ("Missing closing quote '\"' for binding label at %C");
5442 /* User started string with '"' so looked to match it. */
5448 if (gfc_match_char ('\'') != MATCH_YES
)
5450 gfc_error ("Missing closing quote '\'' for binding label at %C");
5451 /* User started string with "'" char. */
5457 /* Get the required right paren. */
5458 if (gfc_match_char (')') != MATCH_YES
)
5460 gfc_error ("Missing closing paren for binding label at %C");
5464 if (has_name_equals
&& !allow_binding_name
)
5466 gfc_error ("No binding name is allowed in BIND(C) at %C");
5470 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5472 gfc_error ("For dummy procedure %s, no binding name is "
5473 "allowed in BIND(C) at %C", sym
->name
);
5478 /* Save the binding label to the symbol. If sym is null, we're
5479 probably matching the typespec attributes of a declaration and
5480 haven't gotten the name yet, and therefore, no symbol yet. */
5481 if (binding_label
[0] != '\0')
5485 strcpy (sym
->binding_label
, binding_label
);
5488 strcpy (curr_binding_label
, binding_label
);
5490 else if (allow_binding_name
)
5492 /* No binding label, but if symbol isn't null, we
5493 can set the label for it here.
5494 If name="" or allow_binding_name is false, no C binding name is
5496 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
5497 strncpy (sym
->binding_label
, sym
->name
, strlen (sym
->name
) + 1);
5500 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
5501 && current_interface
.type
== INTERFACE_ABSTRACT
)
5503 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5511 /* Return nonzero if we're currently compiling a contained procedure. */
5514 contained_procedure (void)
5516 gfc_state_data
*s
= gfc_state_stack
;
5518 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
5519 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
5525 /* Set the kind of each enumerator. The kind is selected such that it is
5526 interoperable with the corresponding C enumeration type, making
5527 sure that -fshort-enums is honored. */
5532 enumerator_history
*current_history
= NULL
;
5536 if (max_enum
== NULL
|| enum_history
== NULL
)
5539 if (!flag_short_enums
)
5545 kind
= gfc_integer_kinds
[i
++].kind
;
5547 while (kind
< gfc_c_int_kind
5548 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
5551 current_history
= enum_history
;
5552 while (current_history
!= NULL
)
5554 current_history
->sym
->ts
.kind
= kind
;
5555 current_history
= current_history
->next
;
5560 /* Match any of the various end-block statements. Returns the type of
5561 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5562 and END BLOCK statements cannot be replaced by a single END statement. */
5565 gfc_match_end (gfc_statement
*st
)
5567 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5568 gfc_compile_state state
;
5570 const char *block_name
;
5575 old_loc
= gfc_current_locus
;
5576 if (gfc_match ("end") != MATCH_YES
)
5579 state
= gfc_current_state ();
5580 block_name
= gfc_current_block () == NULL
5581 ? NULL
: gfc_current_block ()->name
;
5585 case COMP_ASSOCIATE
:
5587 if (!strcmp (block_name
, "block@"))
5592 case COMP_DERIVED_CONTAINS
:
5593 state
= gfc_state_stack
->previous
->state
;
5594 block_name
= gfc_state_stack
->previous
->sym
== NULL
5595 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
5606 *st
= ST_END_PROGRAM
;
5607 target
= " program";
5611 case COMP_SUBROUTINE
:
5612 *st
= ST_END_SUBROUTINE
;
5613 target
= " subroutine";
5614 eos_ok
= !contained_procedure ();
5618 *st
= ST_END_FUNCTION
;
5619 target
= " function";
5620 eos_ok
= !contained_procedure ();
5623 case COMP_BLOCK_DATA
:
5624 *st
= ST_END_BLOCK_DATA
;
5625 target
= " block data";
5630 *st
= ST_END_MODULE
;
5635 case COMP_INTERFACE
:
5636 *st
= ST_END_INTERFACE
;
5637 target
= " interface";
5642 case COMP_DERIVED_CONTAINS
:
5648 case COMP_ASSOCIATE
:
5649 *st
= ST_END_ASSOCIATE
;
5650 target
= " associate";
5673 *st
= ST_END_CRITICAL
;
5674 target
= " critical";
5679 case COMP_SELECT_TYPE
:
5680 *st
= ST_END_SELECT
;
5686 *st
= ST_END_FORALL
;
5701 last_initializer
= NULL
;
5703 gfc_free_enum_history ();
5707 gfc_error ("Unexpected END statement at %C");
5711 if (gfc_match_eos () == MATCH_YES
)
5713 if (!eos_ok
&& (*st
== ST_END_SUBROUTINE
|| *st
== ST_END_FUNCTION
))
5715 if (gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: END statement "
5716 "instead of %s statement at %L",
5717 gfc_ascii_statement (*st
), &old_loc
) == FAILURE
)
5722 /* We would have required END [something]. */
5723 gfc_error ("%s statement expected at %L",
5724 gfc_ascii_statement (*st
), &old_loc
);
5731 /* Verify that we've got the sort of end-block that we're expecting. */
5732 if (gfc_match (target
) != MATCH_YES
)
5734 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st
));
5738 /* If we're at the end, make sure a block name wasn't required. */
5739 if (gfc_match_eos () == MATCH_YES
)
5742 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
5743 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
&& *st
!= ST_END_BLOCK
5744 && *st
!= ST_END_ASSOCIATE
&& *st
!= ST_END_CRITICAL
)
5750 gfc_error ("Expected block name of '%s' in %s statement at %C",
5751 block_name
, gfc_ascii_statement (*st
));
5756 /* END INTERFACE has a special handler for its several possible endings. */
5757 if (*st
== ST_END_INTERFACE
)
5758 return gfc_match_end_interface ();
5760 /* We haven't hit the end of statement, so what is left must be an
5762 m
= gfc_match_space ();
5764 m
= gfc_match_name (name
);
5767 gfc_error ("Expected terminating name at %C");
5771 if (block_name
== NULL
)
5774 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
5776 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
5777 gfc_ascii_statement (*st
));
5780 /* Procedure pointer as function result. */
5781 else if (strcmp (block_name
, "ppr@") == 0
5782 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
5784 gfc_error ("Expected label '%s' for %s statement at %C",
5785 gfc_current_block ()->ns
->proc_name
->name
,
5786 gfc_ascii_statement (*st
));
5790 if (gfc_match_eos () == MATCH_YES
)
5794 gfc_syntax_error (*st
);
5797 gfc_current_locus
= old_loc
;
5803 /***************** Attribute declaration statements ****************/
5805 /* Set the attribute of a single variable. */
5810 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5818 m
= gfc_match_name (name
);
5822 if (find_special (name
, &sym
, false))
5825 var_locus
= gfc_current_locus
;
5827 /* Deal with possible array specification for certain attributes. */
5828 if (current_attr
.dimension
5829 || current_attr
.codimension
5830 || current_attr
.allocatable
5831 || current_attr
.pointer
5832 || current_attr
.target
)
5834 m
= gfc_match_array_spec (&as
, !current_attr
.codimension
,
5835 !current_attr
.dimension
5836 && !current_attr
.pointer
5837 && !current_attr
.target
);
5838 if (m
== MATCH_ERROR
)
5841 if (current_attr
.dimension
&& m
== MATCH_NO
)
5843 gfc_error ("Missing array specification at %L in DIMENSION "
5844 "statement", &var_locus
);
5849 if (current_attr
.dimension
&& sym
->value
)
5851 gfc_error ("Dimensions specified for %s at %L after its "
5852 "initialisation", sym
->name
, &var_locus
);
5857 if (current_attr
.codimension
&& m
== MATCH_NO
)
5859 gfc_error ("Missing array specification at %L in CODIMENSION "
5860 "statement", &var_locus
);
5865 if ((current_attr
.allocatable
|| current_attr
.pointer
)
5866 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
5868 gfc_error ("Array specification must be deferred at %L", &var_locus
);
5874 /* Update symbol table. DIMENSION attribute is set in
5875 gfc_set_array_spec(). For CLASS variables, this must be applied
5876 to the first component, or '$data' field. */
5877 if (sym
->ts
.type
== BT_CLASS
)
5879 if (gfc_copy_attr (&CLASS_DATA (sym
)->attr
, ¤t_attr
,&var_locus
)
5885 sym
->attr
.class_ok
= (sym
->attr
.class_ok
|| current_attr
.allocatable
5886 || current_attr
.pointer
);
5890 if (current_attr
.dimension
== 0 && current_attr
.codimension
== 0
5891 && gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
) == FAILURE
)
5898 if (gfc_set_array_spec (sym
, as
, &var_locus
) == FAILURE
)
5904 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
5906 /* Fix the array spec. */
5907 m
= gfc_mod_pointee_as (sym
->as
);
5908 if (m
== MATCH_ERROR
)
5912 if (gfc_add_attribute (&sym
->attr
, &var_locus
) == FAILURE
)
5918 if ((current_attr
.external
|| current_attr
.intrinsic
)
5919 && sym
->attr
.flavor
!= FL_PROCEDURE
5920 && gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
) == FAILURE
)
5926 add_hidden_procptr_result (sym
);
5931 gfc_free_array_spec (as
);
5936 /* Generic attribute declaration subroutine. Used for attributes that
5937 just have a list of names. */
5944 /* Gobble the optional double colon, by simply ignoring the result
5954 if (gfc_match_eos () == MATCH_YES
)
5960 if (gfc_match_char (',') != MATCH_YES
)
5962 gfc_error ("Unexpected character in variable list at %C");
5972 /* This routine matches Cray Pointer declarations of the form:
5973 pointer ( <pointer>, <pointee> )
5975 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5976 The pointer, if already declared, should be an integer. Otherwise, we
5977 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5978 be either a scalar, or an array declaration. No space is allocated for
5979 the pointee. For the statement
5980 pointer (ipt, ar(10))
5981 any subsequent uses of ar will be translated (in C-notation) as
5982 ar(i) => ((<type> *) ipt)(i)
5983 After gimplification, pointee variable will disappear in the code. */
5986 cray_pointer_decl (void)
5989 gfc_array_spec
*as
= NULL
;
5990 gfc_symbol
*cptr
; /* Pointer symbol. */
5991 gfc_symbol
*cpte
; /* Pointee symbol. */
5997 if (gfc_match_char ('(') != MATCH_YES
)
5999 gfc_error ("Expected '(' at %C");
6003 /* Match pointer. */
6004 var_locus
= gfc_current_locus
;
6005 gfc_clear_attr (¤t_attr
);
6006 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
6007 current_ts
.type
= BT_INTEGER
;
6008 current_ts
.kind
= gfc_index_integer_kind
;
6010 m
= gfc_match_symbol (&cptr
, 0);
6013 gfc_error ("Expected variable name at %C");
6017 if (gfc_add_cray_pointer (&cptr
->attr
, &var_locus
) == FAILURE
)
6020 gfc_set_sym_referenced (cptr
);
6022 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
6024 cptr
->ts
.type
= BT_INTEGER
;
6025 cptr
->ts
.kind
= gfc_index_integer_kind
;
6027 else if (cptr
->ts
.type
!= BT_INTEGER
)
6029 gfc_error ("Cray pointer at %C must be an integer");
6032 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
6033 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
6034 " memory addresses require %d bytes",
6035 cptr
->ts
.kind
, gfc_index_integer_kind
);
6037 if (gfc_match_char (',') != MATCH_YES
)
6039 gfc_error ("Expected \",\" at %C");
6043 /* Match Pointee. */
6044 var_locus
= gfc_current_locus
;
6045 gfc_clear_attr (¤t_attr
);
6046 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
6047 current_ts
.type
= BT_UNKNOWN
;
6048 current_ts
.kind
= 0;
6050 m
= gfc_match_symbol (&cpte
, 0);
6053 gfc_error ("Expected variable name at %C");
6057 /* Check for an optional array spec. */
6058 m
= gfc_match_array_spec (&as
, true, false);
6059 if (m
== MATCH_ERROR
)
6061 gfc_free_array_spec (as
);
6064 else if (m
== MATCH_NO
)
6066 gfc_free_array_spec (as
);
6070 if (gfc_add_cray_pointee (&cpte
->attr
, &var_locus
) == FAILURE
)
6073 gfc_set_sym_referenced (cpte
);
6075 if (cpte
->as
== NULL
)
6077 if (gfc_set_array_spec (cpte
, as
, &var_locus
) == FAILURE
)
6078 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6080 else if (as
!= NULL
)
6082 gfc_error ("Duplicate array spec for Cray pointee at %C");
6083 gfc_free_array_spec (as
);
6089 if (cpte
->as
!= NULL
)
6091 /* Fix array spec. */
6092 m
= gfc_mod_pointee_as (cpte
->as
);
6093 if (m
== MATCH_ERROR
)
6097 /* Point the Pointee at the Pointer. */
6098 cpte
->cp_pointer
= cptr
;
6100 if (gfc_match_char (')') != MATCH_YES
)
6102 gfc_error ("Expected \")\" at %C");
6105 m
= gfc_match_char (',');
6107 done
= true; /* Stop searching for more declarations. */
6111 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
6112 || gfc_match_eos () != MATCH_YES
)
6114 gfc_error ("Expected \",\" or end of statement at %C");
6122 gfc_match_external (void)
6125 gfc_clear_attr (¤t_attr
);
6126 current_attr
.external
= 1;
6128 return attr_decl ();
6133 gfc_match_intent (void)
6137 /* This is not allowed within a BLOCK construct! */
6138 if (gfc_current_state () == COMP_BLOCK
)
6140 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6144 intent
= match_intent_spec ();
6145 if (intent
== INTENT_UNKNOWN
)
6148 gfc_clear_attr (¤t_attr
);
6149 current_attr
.intent
= intent
;
6151 return attr_decl ();
6156 gfc_match_intrinsic (void)
6159 gfc_clear_attr (¤t_attr
);
6160 current_attr
.intrinsic
= 1;
6162 return attr_decl ();
6167 gfc_match_optional (void)
6169 /* This is not allowed within a BLOCK construct! */
6170 if (gfc_current_state () == COMP_BLOCK
)
6172 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6176 gfc_clear_attr (¤t_attr
);
6177 current_attr
.optional
= 1;
6179 return attr_decl ();
6184 gfc_match_pointer (void)
6186 gfc_gobble_whitespace ();
6187 if (gfc_peek_ascii_char () == '(')
6189 if (!gfc_option
.flag_cray_pointer
)
6191 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6195 return cray_pointer_decl ();
6199 gfc_clear_attr (¤t_attr
);
6200 current_attr
.pointer
= 1;
6202 return attr_decl ();
6208 gfc_match_allocatable (void)
6210 gfc_clear_attr (¤t_attr
);
6211 current_attr
.allocatable
= 1;
6213 return attr_decl ();
6218 gfc_match_codimension (void)
6220 gfc_clear_attr (¤t_attr
);
6221 current_attr
.codimension
= 1;
6223 return attr_decl ();
6228 gfc_match_contiguous (void)
6230 if (gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: CONTIGUOUS statement at %C")
6234 gfc_clear_attr (¤t_attr
);
6235 current_attr
.contiguous
= 1;
6237 return attr_decl ();
6242 gfc_match_dimension (void)
6244 gfc_clear_attr (¤t_attr
);
6245 current_attr
.dimension
= 1;
6247 return attr_decl ();
6252 gfc_match_target (void)
6254 gfc_clear_attr (¤t_attr
);
6255 current_attr
.target
= 1;
6257 return attr_decl ();
6261 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6265 access_attr_decl (gfc_statement st
)
6267 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6268 interface_type type
;
6271 gfc_intrinsic_op op
;
6274 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6279 m
= gfc_match_generic_spec (&type
, name
, &op
);
6282 if (m
== MATCH_ERROR
)
6287 case INTERFACE_NAMELESS
:
6288 case INTERFACE_ABSTRACT
:
6291 case INTERFACE_GENERIC
:
6292 if (gfc_get_symbol (name
, NULL
, &sym
))
6295 if (gfc_add_access (&sym
->attr
, (st
== ST_PUBLIC
)
6296 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
6297 sym
->name
, NULL
) == FAILURE
)
6302 case INTERFACE_INTRINSIC_OP
:
6303 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
6305 gfc_current_ns
->operator_access
[op
] =
6306 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6310 gfc_error ("Access specification of the %s operator at %C has "
6311 "already been specified", gfc_op2string (op
));
6317 case INTERFACE_USER_OP
:
6318 uop
= gfc_get_uop (name
);
6320 if (uop
->access
== ACCESS_UNKNOWN
)
6322 uop
->access
= (st
== ST_PUBLIC
)
6323 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6327 gfc_error ("Access specification of the .%s. operator at %C "
6328 "has already been specified", sym
->name
);
6335 if (gfc_match_char (',') == MATCH_NO
)
6339 if (gfc_match_eos () != MATCH_YES
)
6344 gfc_syntax_error (st
);
6352 gfc_match_protected (void)
6357 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6359 gfc_error ("PROTECTED at %C only allowed in specification "
6360 "part of a module");
6365 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED statement at %C")
6369 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6374 if (gfc_match_eos () == MATCH_YES
)
6379 m
= gfc_match_symbol (&sym
, 0);
6383 if (gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6396 if (gfc_match_eos () == MATCH_YES
)
6398 if (gfc_match_char (',') != MATCH_YES
)
6405 gfc_error ("Syntax error in PROTECTED statement at %C");
6410 /* The PRIVATE statement is a bit weird in that it can be an attribute
6411 declaration, but also works as a standalone statement inside of a
6412 type declaration or a module. */
6415 gfc_match_private (gfc_statement
*st
)
6418 if (gfc_match ("private") != MATCH_YES
)
6421 if (gfc_current_state () != COMP_MODULE
6422 && !(gfc_current_state () == COMP_DERIVED
6423 && gfc_state_stack
->previous
6424 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
6425 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6426 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
6427 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
6429 gfc_error ("PRIVATE statement at %C is only allowed in the "
6430 "specification part of a module");
6434 if (gfc_current_state () == COMP_DERIVED
)
6436 if (gfc_match_eos () == MATCH_YES
)
6442 gfc_syntax_error (ST_PRIVATE
);
6446 if (gfc_match_eos () == MATCH_YES
)
6453 return access_attr_decl (ST_PRIVATE
);
6458 gfc_match_public (gfc_statement
*st
)
6461 if (gfc_match ("public") != MATCH_YES
)
6464 if (gfc_current_state () != COMP_MODULE
)
6466 gfc_error ("PUBLIC statement at %C is only allowed in the "
6467 "specification part of a module");
6471 if (gfc_match_eos () == MATCH_YES
)
6478 return access_attr_decl (ST_PUBLIC
);
6482 /* Workhorse for gfc_match_parameter. */
6492 m
= gfc_match_symbol (&sym
, 0);
6494 gfc_error ("Expected variable name at %C in PARAMETER statement");
6499 if (gfc_match_char ('=') == MATCH_NO
)
6501 gfc_error ("Expected = sign in PARAMETER statement at %C");
6505 m
= gfc_match_init_expr (&init
);
6507 gfc_error ("Expected expression at %C in PARAMETER statement");
6511 if (sym
->ts
.type
== BT_UNKNOWN
6512 && gfc_set_default_type (sym
, 1, NULL
) == FAILURE
)
6518 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
6519 || gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
) == FAILURE
)
6527 gfc_error ("Initializing already initialized variable at %C");
6532 t
= add_init_expr_to_sym (sym
->name
, &init
, &gfc_current_locus
);
6533 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
6536 gfc_free_expr (init
);
6541 /* Match a parameter statement, with the weird syntax that these have. */
6544 gfc_match_parameter (void)
6548 if (gfc_match_char ('(') == MATCH_NO
)
6557 if (gfc_match (" )%t") == MATCH_YES
)
6560 if (gfc_match_char (',') != MATCH_YES
)
6562 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6572 /* Save statements have a special syntax. */
6575 gfc_match_save (void)
6577 char n
[GFC_MAX_SYMBOL_LEN
+1];
6582 if (gfc_match_eos () == MATCH_YES
)
6584 if (gfc_current_ns
->seen_save
)
6586 if (gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
6587 "follows previous SAVE statement")
6592 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
6596 if (gfc_current_ns
->save_all
)
6598 if (gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
6599 "blanket SAVE statement")
6608 m
= gfc_match_symbol (&sym
, 0);
6612 if (gfc_add_save (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6624 m
= gfc_match (" / %n /", &n
);
6625 if (m
== MATCH_ERROR
)
6630 c
= gfc_get_common (n
, 0);
6633 gfc_current_ns
->seen_save
= 1;
6636 if (gfc_match_eos () == MATCH_YES
)
6638 if (gfc_match_char (',') != MATCH_YES
)
6645 gfc_error ("Syntax error in SAVE statement at %C");
6651 gfc_match_value (void)
6656 /* This is not allowed within a BLOCK construct! */
6657 if (gfc_current_state () == COMP_BLOCK
)
6659 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6663 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE statement at %C")
6667 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6672 if (gfc_match_eos () == MATCH_YES
)
6677 m
= gfc_match_symbol (&sym
, 0);
6681 if (gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6694 if (gfc_match_eos () == MATCH_YES
)
6696 if (gfc_match_char (',') != MATCH_YES
)
6703 gfc_error ("Syntax error in VALUE statement at %C");
6709 gfc_match_volatile (void)
6714 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VOLATILE statement at %C")
6718 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6723 if (gfc_match_eos () == MATCH_YES
)
6728 /* VOLATILE is special because it can be added to host-associated
6729 symbols locally. Except for coarrays. */
6730 m
= gfc_match_symbol (&sym
, 1);
6734 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
6735 for variable in a BLOCK which is defined outside of the BLOCK. */
6736 if (sym
->ns
!= gfc_current_ns
&& sym
->attr
.codimension
)
6738 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
6739 "%C, which is use-/host-associated", sym
->name
);
6742 if (gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6755 if (gfc_match_eos () == MATCH_YES
)
6757 if (gfc_match_char (',') != MATCH_YES
)
6764 gfc_error ("Syntax error in VOLATILE statement at %C");
6770 gfc_match_asynchronous (void)
6775 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ASYNCHRONOUS statement at %C")
6779 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6784 if (gfc_match_eos () == MATCH_YES
)
6789 /* ASYNCHRONOUS is special because it can be added to host-associated
6791 m
= gfc_match_symbol (&sym
, 1);
6795 if (gfc_add_asynchronous (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6808 if (gfc_match_eos () == MATCH_YES
)
6810 if (gfc_match_char (',') != MATCH_YES
)
6817 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6822 /* Match a module procedure statement. Note that we have to modify
6823 symbols in the parent's namespace because the current one was there
6824 to receive symbols that are in an interface's formal argument list. */
6827 gfc_match_modproc (void)
6829 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6832 gfc_namespace
*module_ns
;
6833 gfc_interface
*old_interface_head
, *interface
;
6835 if (gfc_state_stack
->state
!= COMP_INTERFACE
6836 || gfc_state_stack
->previous
== NULL
6837 || current_interface
.type
== INTERFACE_NAMELESS
6838 || current_interface
.type
== INTERFACE_ABSTRACT
)
6840 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6845 module_ns
= gfc_current_ns
->parent
;
6846 for (; module_ns
; module_ns
= module_ns
->parent
)
6847 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
6848 || module_ns
->proc_name
->attr
.flavor
== FL_PROGRAM
6849 || (module_ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
6850 && !module_ns
->proc_name
->attr
.contained
))
6853 if (module_ns
== NULL
)
6856 /* Store the current state of the interface. We will need it if we
6857 end up with a syntax error and need to recover. */
6858 old_interface_head
= gfc_current_interface_head ();
6862 locus old_locus
= gfc_current_locus
;
6865 m
= gfc_match_name (name
);
6871 /* Check for syntax error before starting to add symbols to the
6872 current namespace. */
6873 if (gfc_match_eos () == MATCH_YES
)
6875 if (!last
&& gfc_match_char (',') != MATCH_YES
)
6878 /* Now we're sure the syntax is valid, we process this item
6880 if (gfc_get_symbol (name
, module_ns
, &sym
))
6883 if (sym
->attr
.intrinsic
)
6885 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6886 "PROCEDURE", &old_locus
);
6890 if (sym
->attr
.proc
!= PROC_MODULE
6891 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
6892 sym
->name
, NULL
) == FAILURE
)
6895 if (gfc_add_interface (sym
) == FAILURE
)
6898 sym
->attr
.mod_proc
= 1;
6899 sym
->declared_at
= old_locus
;
6908 /* Restore the previous state of the interface. */
6909 interface
= gfc_current_interface_head ();
6910 gfc_set_current_interface_head (old_interface_head
);
6912 /* Free the new interfaces. */
6913 while (interface
!= old_interface_head
)
6915 gfc_interface
*i
= interface
->next
;
6916 gfc_free (interface
);
6920 /* And issue a syntax error. */
6921 gfc_syntax_error (ST_MODULE_PROC
);
6926 /* Check a derived type that is being extended. */
6928 check_extended_derived_type (char *name
)
6930 gfc_symbol
*extended
;
6932 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
6934 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6940 gfc_error ("No such symbol in TYPE definition at %C");
6944 if (extended
->attr
.flavor
!= FL_DERIVED
)
6946 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6947 "derived type", name
);
6951 if (extended
->attr
.is_bind_c
)
6953 gfc_error ("'%s' cannot be extended at %C because it "
6954 "is BIND(C)", extended
->name
);
6958 if (extended
->attr
.sequence
)
6960 gfc_error ("'%s' cannot be extended at %C because it "
6961 "is a SEQUENCE type", extended
->name
);
6969 /* Match the optional attribute specifiers for a type declaration.
6970 Return MATCH_ERROR if an error is encountered in one of the handled
6971 attributes (public, private, bind(c)), MATCH_NO if what's found is
6972 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6973 checking on attribute conflicts needs to be done. */
6976 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
6978 /* See if the derived type is marked as private. */
6979 if (gfc_match (" , private") == MATCH_YES
)
6981 if (gfc_current_state () != COMP_MODULE
)
6983 gfc_error ("Derived type at %C can only be PRIVATE in the "
6984 "specification part of a module");
6988 if (gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
) == FAILURE
)
6991 else if (gfc_match (" , public") == MATCH_YES
)
6993 if (gfc_current_state () != COMP_MODULE
)
6995 gfc_error ("Derived type at %C can only be PUBLIC in the "
6996 "specification part of a module");
7000 if (gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
) == FAILURE
)
7003 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
7005 /* If the type is defined to be bind(c) it then needs to make
7006 sure that all fields are interoperable. This will
7007 need to be a semantic check on the finished derived type.
7008 See 15.2.3 (lines 9-12) of F2003 draft. */
7009 if (gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0) != SUCCESS
)
7012 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
7014 else if (gfc_match (" , abstract") == MATCH_YES
)
7016 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ABSTRACT type at %C")
7020 if (gfc_add_abstract (attr
, &gfc_current_locus
) == FAILURE
)
7023 else if (name
&& gfc_match(" , extends ( %n )", name
) == MATCH_YES
)
7025 if (gfc_add_extension (attr
, &gfc_current_locus
) == FAILURE
)
7031 /* If we get here, something matched. */
7036 /* Assign a hash value for a derived type. The algorithm is that of
7037 SDBM. The hashed string is '[module_name #] derived_name'. */
7039 hash_value (gfc_symbol
*sym
)
7041 unsigned int hash
= 0;
7045 /* Hash of the module or procedure name. */
7046 if (sym
->module
!= NULL
)
7048 else if (sym
->ns
&& sym
->ns
->proc_name
7049 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
7050 c
= sym
->ns
->proc_name
->name
;
7057 for (i
= 0; i
< len
; i
++, c
++)
7058 hash
= (hash
<< 6) + (hash
<< 16) - hash
+ (*c
);
7060 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
7061 hash
= (hash
<< 6) + (hash
<< 16) - hash
+ '#';
7064 /* Hash of the derived type name. */
7065 len
= strlen (sym
->name
);
7067 for (i
= 0; i
< len
; i
++, c
++)
7068 hash
= (hash
<< 6) + (hash
<< 16) - hash
+ (*c
);
7070 /* Return the hash but take the modulus for the sake of module read,
7071 even though this slightly increases the chance of collision. */
7072 return (hash
% 100000000);
7076 /* Match the beginning of a derived type declaration. If a type name
7077 was the result of a function, then it is possible to have a symbol
7078 already to be known as a derived type yet have no components. */
7081 gfc_match_derived_decl (void)
7083 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7084 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
7085 symbol_attribute attr
;
7087 gfc_symbol
*extended
;
7089 match is_type_attr_spec
= MATCH_NO
;
7090 bool seen_attr
= false;
7092 if (gfc_current_state () == COMP_DERIVED
)
7097 gfc_clear_attr (&attr
);
7102 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
7103 if (is_type_attr_spec
== MATCH_ERROR
)
7105 if (is_type_attr_spec
== MATCH_YES
)
7107 } while (is_type_attr_spec
== MATCH_YES
);
7109 /* Deal with derived type extensions. The extension attribute has
7110 been added to 'attr' but now the parent type must be found and
7113 extended
= check_extended_derived_type (parent
);
7115 if (parent
[0] && !extended
)
7118 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
7120 gfc_error ("Expected :: in TYPE definition at %C");
7124 m
= gfc_match (" %n%t", name
);
7128 /* Make sure the name is not the name of an intrinsic type. */
7129 if (gfc_is_intrinsic_typename (name
))
7131 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7136 if (gfc_get_symbol (name
, NULL
, &sym
))
7139 if (sym
->ts
.type
!= BT_UNKNOWN
)
7141 gfc_error ("Derived type name '%s' at %C already has a basic type "
7142 "of %s", sym
->name
, gfc_typename (&sym
->ts
));
7146 /* The symbol may already have the derived attribute without the
7147 components. The ways this can happen is via a function
7148 definition, an INTRINSIC statement or a subtype in another
7149 derived type that is a pointer. The first part of the AND clause
7150 is true if the symbol is not the return value of a function. */
7151 if (sym
->attr
.flavor
!= FL_DERIVED
7152 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
7155 if (sym
->components
!= NULL
|| sym
->attr
.zero_comp
)
7157 gfc_error ("Derived type definition of '%s' at %C has already been "
7158 "defined", sym
->name
);
7162 if (attr
.access
!= ACCESS_UNKNOWN
7163 && gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
) == FAILURE
)
7166 /* See if the derived type was labeled as bind(c). */
7167 if (attr
.is_bind_c
!= 0)
7168 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
7170 /* Construct the f2k_derived namespace if it is not yet there. */
7171 if (!sym
->f2k_derived
)
7172 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7174 if (extended
&& !sym
->components
)
7179 /* Add the extended derived type as the first component. */
7180 gfc_add_component (sym
, parent
, &p
);
7182 gfc_set_sym_referenced (extended
);
7184 p
->ts
.type
= BT_DERIVED
;
7185 p
->ts
.u
.derived
= extended
;
7186 p
->initializer
= gfc_default_initializer (&p
->ts
);
7188 /* Set extension level. */
7189 if (extended
->attr
.extension
== 255)
7191 /* Since the extension field is 8 bit wide, we can only have
7192 up to 255 extension levels. */
7193 gfc_error ("Maximum extension level reached with type '%s' at %L",
7194 extended
->name
, &extended
->declared_at
);
7197 sym
->attr
.extension
= extended
->attr
.extension
+ 1;
7199 /* Provide the links between the extended type and its extension. */
7200 if (!extended
->f2k_derived
)
7201 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7202 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
7206 if (!sym
->hash_value
)
7207 /* Set the hash for the compound name for this type. */
7208 sym
->hash_value
= hash_value (sym
);
7210 /* Take over the ABSTRACT attribute. */
7211 sym
->attr
.abstract
= attr
.abstract
;
7213 gfc_new_block
= sym
;
7219 /* Cray Pointees can be declared as:
7220 pointer (ipt, a (n,m,...,*)) */
7223 gfc_mod_pointee_as (gfc_array_spec
*as
)
7225 as
->cray_pointee
= true; /* This will be useful to know later. */
7226 if (as
->type
== AS_ASSUMED_SIZE
)
7227 as
->cp_was_assumed
= true;
7228 else if (as
->type
== AS_ASSUMED_SHAPE
)
7230 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7237 /* Match the enum definition statement, here we are trying to match
7238 the first line of enum definition statement.
7239 Returns MATCH_YES if match is found. */
7242 gfc_match_enum (void)
7246 m
= gfc_match_eos ();
7250 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ENUM and ENUMERATOR at %C")
7258 /* Returns an initializer whose value is one higher than the value of the
7259 LAST_INITIALIZER argument. If the argument is NULL, the
7260 initializers value will be set to zero. The initializer's kind
7261 will be set to gfc_c_int_kind.
7263 If -fshort-enums is given, the appropriate kind will be selected
7264 later after all enumerators have been parsed. A warning is issued
7265 here if an initializer exceeds gfc_c_int_kind. */
7268 enum_initializer (gfc_expr
*last_initializer
, locus where
)
7271 result
= gfc_get_constant_expr (BT_INTEGER
, gfc_c_int_kind
, &where
);
7273 mpz_init (result
->value
.integer
);
7275 if (last_initializer
!= NULL
)
7277 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
7278 result
->where
= last_initializer
->where
;
7280 if (gfc_check_integer_range (result
->value
.integer
,
7281 gfc_c_int_kind
) != ARITH_OK
)
7283 gfc_error ("Enumerator exceeds the C integer type at %C");
7289 /* Control comes here, if it's the very first enumerator and no
7290 initializer has been given. It will be initialized to zero. */
7291 mpz_set_si (result
->value
.integer
, 0);
7298 /* Match a variable name with an optional initializer. When this
7299 subroutine is called, a variable is expected to be parsed next.
7300 Depending on what is happening at the moment, updates either the
7301 symbol table or the current interface. */
7304 enumerator_decl (void)
7306 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7307 gfc_expr
*initializer
;
7308 gfc_array_spec
*as
= NULL
;
7316 old_locus
= gfc_current_locus
;
7318 /* When we get here, we've just matched a list of attributes and
7319 maybe a type and a double colon. The next thing we expect to see
7320 is the name of the symbol. */
7321 m
= gfc_match_name (name
);
7325 var_locus
= gfc_current_locus
;
7327 /* OK, we've successfully matched the declaration. Now put the
7328 symbol in the current namespace. If we fail to create the symbol,
7330 if (build_sym (name
, NULL
, &as
, &var_locus
) == FAILURE
)
7336 /* The double colon must be present in order to have initializers.
7337 Otherwise the statement is ambiguous with an assignment statement. */
7340 if (gfc_match_char ('=') == MATCH_YES
)
7342 m
= gfc_match_init_expr (&initializer
);
7345 gfc_error ("Expected an initialization expression at %C");
7354 /* If we do not have an initializer, the initialization value of the
7355 previous enumerator (stored in last_initializer) is incremented
7356 by 1 and is used to initialize the current enumerator. */
7357 if (initializer
== NULL
)
7358 initializer
= enum_initializer (last_initializer
, old_locus
);
7360 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
7362 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7368 /* Store this current initializer, for the next enumerator variable
7369 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7370 use last_initializer below. */
7371 last_initializer
= initializer
;
7372 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
7374 /* Maintain enumerator history. */
7375 gfc_find_symbol (name
, NULL
, 0, &sym
);
7376 create_enum_history (sym
, last_initializer
);
7378 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
7381 /* Free stuff up and return. */
7382 gfc_free_expr (initializer
);
7388 /* Match the enumerator definition statement. */
7391 gfc_match_enumerator_def (void)
7396 gfc_clear_ts (¤t_ts
);
7398 m
= gfc_match (" enumerator");
7402 m
= gfc_match (" :: ");
7403 if (m
== MATCH_ERROR
)
7406 colon_seen
= (m
== MATCH_YES
);
7408 if (gfc_current_state () != COMP_ENUM
)
7410 gfc_error ("ENUM definition statement expected before %C");
7411 gfc_free_enum_history ();
7415 (¤t_ts
)->type
= BT_INTEGER
;
7416 (¤t_ts
)->kind
= gfc_c_int_kind
;
7418 gfc_clear_attr (¤t_attr
);
7419 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
7428 m
= enumerator_decl ();
7429 if (m
== MATCH_ERROR
)
7431 gfc_free_enum_history ();
7437 if (gfc_match_eos () == MATCH_YES
)
7439 if (gfc_match_char (',') != MATCH_YES
)
7443 if (gfc_current_state () == COMP_ENUM
)
7445 gfc_free_enum_history ();
7446 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7451 gfc_free_array_spec (current_as
);
7458 /* Match binding attributes. */
7461 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
7463 bool found_passing
= false;
7464 bool seen_ptr
= false;
7465 match m
= MATCH_YES
;
7467 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7468 this case the defaults are in there. */
7469 ba
->access
= ACCESS_UNKNOWN
;
7470 ba
->pass_arg
= NULL
;
7471 ba
->pass_arg_num
= 0;
7473 ba
->non_overridable
= 0;
7477 /* If we find a comma, we believe there are binding attributes. */
7478 m
= gfc_match_char (',');
7484 /* Access specifier. */
7486 m
= gfc_match (" public");
7487 if (m
== MATCH_ERROR
)
7491 if (ba
->access
!= ACCESS_UNKNOWN
)
7493 gfc_error ("Duplicate access-specifier at %C");
7497 ba
->access
= ACCESS_PUBLIC
;
7501 m
= gfc_match (" private");
7502 if (m
== MATCH_ERROR
)
7506 if (ba
->access
!= ACCESS_UNKNOWN
)
7508 gfc_error ("Duplicate access-specifier at %C");
7512 ba
->access
= ACCESS_PRIVATE
;
7516 /* If inside GENERIC, the following is not allowed. */
7521 m
= gfc_match (" nopass");
7522 if (m
== MATCH_ERROR
)
7528 gfc_error ("Binding attributes already specify passing,"
7529 " illegal NOPASS at %C");
7533 found_passing
= true;
7538 /* PASS possibly including argument. */
7539 m
= gfc_match (" pass");
7540 if (m
== MATCH_ERROR
)
7544 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
7548 gfc_error ("Binding attributes already specify passing,"
7549 " illegal PASS at %C");
7553 m
= gfc_match (" ( %n )", arg
);
7554 if (m
== MATCH_ERROR
)
7557 ba
->pass_arg
= gfc_get_string (arg
);
7558 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
7560 found_passing
= true;
7568 m
= gfc_match (" pointer");
7569 if (m
== MATCH_ERROR
)
7575 gfc_error ("Duplicate POINTER attribute at %C");
7585 /* NON_OVERRIDABLE flag. */
7586 m
= gfc_match (" non_overridable");
7587 if (m
== MATCH_ERROR
)
7591 if (ba
->non_overridable
)
7593 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7597 ba
->non_overridable
= 1;
7601 /* DEFERRED flag. */
7602 m
= gfc_match (" deferred");
7603 if (m
== MATCH_ERROR
)
7609 gfc_error ("Duplicate DEFERRED at %C");
7620 /* Nothing matching found. */
7622 gfc_error ("Expected access-specifier at %C");
7624 gfc_error ("Expected binding attribute at %C");
7627 while (gfc_match_char (',') == MATCH_YES
);
7629 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7630 if (ba
->non_overridable
&& ba
->deferred
)
7632 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7639 if (ba
->access
== ACCESS_UNKNOWN
)
7640 ba
->access
= gfc_typebound_default_access
;
7642 if (ppc
&& !seen_ptr
)
7644 gfc_error ("POINTER attribute is required for procedure pointer component"
7656 /* Match a PROCEDURE specific binding inside a derived type. */
7659 match_procedure_in_type (void)
7661 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7662 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
7663 char* target
= NULL
, *ifc
= NULL
;
7664 gfc_typebound_proc tb
;
7673 /* Check current state. */
7674 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
7675 block
= gfc_state_stack
->previous
->sym
;
7678 /* Try to match PROCEDURE(interface). */
7679 if (gfc_match (" (") == MATCH_YES
)
7681 m
= gfc_match_name (target_buf
);
7682 if (m
== MATCH_ERROR
)
7686 gfc_error ("Interface-name expected after '(' at %C");
7690 if (gfc_match (" )") != MATCH_YES
)
7692 gfc_error ("')' expected at %C");
7699 /* Construct the data structure. */
7700 tb
.where
= gfc_current_locus
;
7703 /* Match binding attributes. */
7704 m
= match_binding_attributes (&tb
, false, false);
7705 if (m
== MATCH_ERROR
)
7707 seen_attrs
= (m
== MATCH_YES
);
7709 /* Check that attribute DEFERRED is given if an interface is specified. */
7710 if (tb
.deferred
&& !ifc
)
7712 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7715 if (ifc
&& !tb
.deferred
)
7717 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7721 /* Match the colons. */
7722 m
= gfc_match (" ::");
7723 if (m
== MATCH_ERROR
)
7725 seen_colons
= (m
== MATCH_YES
);
7726 if (seen_attrs
&& !seen_colons
)
7728 gfc_error ("Expected '::' after binding-attributes at %C");
7732 /* Match the binding names. */
7735 m
= gfc_match_name (name
);
7736 if (m
== MATCH_ERROR
)
7740 gfc_error ("Expected binding name at %C");
7744 if (num
>1 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: PROCEDURE list"
7745 " at %C") == FAILURE
)
7748 /* Try to match the '=> target', if it's there. */
7750 m
= gfc_match (" =>");
7751 if (m
== MATCH_ERROR
)
7757 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7763 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7768 m
= gfc_match_name (target_buf
);
7769 if (m
== MATCH_ERROR
)
7773 gfc_error ("Expected binding target after '=>' at %C");
7776 target
= target_buf
;
7779 /* If no target was found, it has the same name as the binding. */
7783 /* Get the namespace to insert the symbols into. */
7784 ns
= block
->f2k_derived
;
7787 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7788 if (tb
.deferred
&& !block
->attr
.abstract
)
7790 gfc_error ("Type '%s' containing DEFERRED binding at %C "
7791 "is not ABSTRACT", block
->name
);
7795 /* See if we already have a binding with this name in the symtree which
7796 would be an error. If a GENERIC already targetted this binding, it may
7797 be already there but then typebound is still NULL. */
7798 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7799 if (stree
&& stree
->n
.tb
)
7801 gfc_error ("There is already a procedure with binding name '%s' for "
7802 "the derived type '%s' at %C", name
, block
->name
);
7806 /* Insert it and set attributes. */
7810 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7813 stree
->n
.tb
= gfc_get_typebound_proc (&tb
);
7815 if (gfc_get_sym_tree (target
, gfc_current_ns
, &stree
->n
.tb
->u
.specific
,
7818 gfc_set_sym_referenced (stree
->n
.tb
->u
.specific
->n
.sym
);
7820 if (gfc_match_eos () == MATCH_YES
)
7822 if (gfc_match_char (',') != MATCH_YES
)
7827 gfc_error ("Syntax error in PROCEDURE statement at %C");
7832 /* Match a GENERIC procedure binding inside a derived type. */
7835 gfc_match_generic (void)
7837 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7838 char bind_name
[GFC_MAX_SYMBOL_LEN
+ 16]; /* Allow space for OPERATOR(...). */
7840 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
7841 gfc_typebound_proc
* tb
;
7843 interface_type op_type
;
7844 gfc_intrinsic_op op
;
7847 /* Check current state. */
7848 if (gfc_current_state () == COMP_DERIVED
)
7850 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7853 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
7855 block
= gfc_state_stack
->previous
->sym
;
7856 ns
= block
->f2k_derived
;
7857 gcc_assert (block
&& ns
);
7859 /* See if we get an access-specifier. */
7860 m
= match_binding_attributes (&tbattr
, true, false);
7861 if (m
== MATCH_ERROR
)
7864 /* Now the colons, those are required. */
7865 if (gfc_match (" ::") != MATCH_YES
)
7867 gfc_error ("Expected '::' at %C");
7871 /* Match the binding name; depending on type (operator / generic) format
7872 it for future error messages into bind_name. */
7874 m
= gfc_match_generic_spec (&op_type
, name
, &op
);
7875 if (m
== MATCH_ERROR
)
7879 gfc_error ("Expected generic name or operator descriptor at %C");
7885 case INTERFACE_GENERIC
:
7886 snprintf (bind_name
, sizeof (bind_name
), "%s", name
);
7889 case INTERFACE_USER_OP
:
7890 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(.%s.)", name
);
7893 case INTERFACE_INTRINSIC_OP
:
7894 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(%s)",
7895 gfc_op2string (op
));
7902 /* Match the required =>. */
7903 if (gfc_match (" =>") != MATCH_YES
)
7905 gfc_error ("Expected '=>' at %C");
7909 /* Try to find existing GENERIC binding with this name / for this operator;
7910 if there is something, check that it is another GENERIC and then extend
7911 it rather than building a new node. Otherwise, create it and put it
7912 at the right position. */
7916 case INTERFACE_USER_OP
:
7917 case INTERFACE_GENERIC
:
7919 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
7922 st
= gfc_find_symtree (is_op
? ns
->tb_uop_root
: ns
->tb_sym_root
, name
);
7934 case INTERFACE_INTRINSIC_OP
:
7944 if (!tb
->is_generic
)
7946 gcc_assert (op_type
== INTERFACE_GENERIC
);
7947 gfc_error ("There's already a non-generic procedure with binding name"
7948 " '%s' for the derived type '%s' at %C",
7949 bind_name
, block
->name
);
7953 if (tb
->access
!= tbattr
.access
)
7955 gfc_error ("Binding at %C must have the same access as already"
7956 " defined binding '%s'", bind_name
);
7962 tb
= gfc_get_typebound_proc (NULL
);
7963 tb
->where
= gfc_current_locus
;
7964 tb
->access
= tbattr
.access
;
7966 tb
->u
.generic
= NULL
;
7970 case INTERFACE_GENERIC
:
7971 case INTERFACE_USER_OP
:
7973 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
7976 st
= gfc_new_symtree (is_op
? &ns
->tb_uop_root
: &ns
->tb_sym_root
,
7984 case INTERFACE_INTRINSIC_OP
:
7993 /* Now, match all following names as specific targets. */
7996 gfc_symtree
* target_st
;
7997 gfc_tbp_generic
* target
;
7999 m
= gfc_match_name (name
);
8000 if (m
== MATCH_ERROR
)
8004 gfc_error ("Expected specific binding name at %C");
8008 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
8010 /* See if this is a duplicate specification. */
8011 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
8012 if (target_st
== target
->specific_st
)
8014 gfc_error ("'%s' already defined as specific binding for the"
8015 " generic '%s' at %C", name
, bind_name
);
8019 target
= gfc_get_tbp_generic ();
8020 target
->specific_st
= target_st
;
8021 target
->specific
= NULL
;
8022 target
->next
= tb
->u
.generic
;
8023 tb
->u
.generic
= target
;
8025 while (gfc_match (" ,") == MATCH_YES
);
8027 /* Here should be the end. */
8028 if (gfc_match_eos () != MATCH_YES
)
8030 gfc_error ("Junk after GENERIC binding at %C");
8041 /* Match a FINAL declaration inside a derived type. */
8044 gfc_match_final_decl (void)
8046 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8049 gfc_namespace
* module_ns
;
8053 if (gfc_current_form
== FORM_FREE
)
8055 char c
= gfc_peek_ascii_char ();
8056 if (!gfc_is_whitespace (c
) && c
!= ':')
8060 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
8062 if (gfc_current_form
== FORM_FIXED
)
8065 gfc_error ("FINAL declaration at %C must be inside a derived type "
8066 "CONTAINS section");
8070 block
= gfc_state_stack
->previous
->sym
;
8073 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
8074 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
8076 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8077 " specification part of a MODULE");
8081 module_ns
= gfc_current_ns
;
8082 gcc_assert (module_ns
);
8083 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
8085 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8086 if (gfc_match (" ::") == MATCH_ERROR
)
8089 /* Match the sequence of procedure names. */
8096 if (first
&& gfc_match_eos () == MATCH_YES
)
8098 gfc_error ("Empty FINAL at %C");
8102 m
= gfc_match_name (name
);
8105 gfc_error ("Expected module procedure name at %C");
8108 else if (m
!= MATCH_YES
)
8111 if (gfc_match_eos () == MATCH_YES
)
8113 if (!last
&& gfc_match_char (',') != MATCH_YES
)
8115 gfc_error ("Expected ',' at %C");
8119 if (gfc_get_symbol (name
, module_ns
, &sym
))
8121 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
8125 /* Mark the symbol as module procedure. */
8126 if (sym
->attr
.proc
!= PROC_MODULE
8127 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
8128 sym
->name
, NULL
) == FAILURE
)
8131 /* Check if we already have this symbol in the list, this is an error. */
8132 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
8133 if (f
->proc_sym
== sym
)
8135 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8140 /* Add this symbol to the list of finalizers. */
8141 gcc_assert (block
->f2k_derived
);
8143 f
= XCNEW (gfc_finalizer
);
8145 f
->proc_tree
= NULL
;
8146 f
->where
= gfc_current_locus
;
8147 f
->next
= block
->f2k_derived
->finalizers
;
8148 block
->f2k_derived
->finalizers
= f
;
8158 const ext_attr_t ext_attr_list
[] = {
8159 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
8160 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
8161 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
8162 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
8163 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
8164 { NULL
, EXT_ATTR_LAST
, NULL
}
8167 /* Match a !GCC$ ATTRIBUTES statement of the form:
8168 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8169 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8171 TODO: We should support all GCC attributes using the same syntax for
8172 the attribute list, i.e. the list in C
8173 __attributes(( attribute-list ))
8175 !GCC$ ATTRIBUTES attribute-list ::
8176 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8179 As there is absolutely no risk of confusion, we should never return
8182 gfc_match_gcc_attributes (void)
8184 symbol_attribute attr
;
8185 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8190 gfc_clear_attr (&attr
);
8195 if (gfc_match_name (name
) != MATCH_YES
)
8198 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
8199 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
8202 if (id
== EXT_ATTR_LAST
)
8204 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8208 if (gfc_add_ext_attribute (&attr
, (ext_attr_id_t
) id
, &gfc_current_locus
)
8212 gfc_gobble_whitespace ();
8213 ch
= gfc_next_ascii_char ();
8216 /* This is the successful exit condition for the loop. */
8217 if (gfc_next_ascii_char () == ':')
8227 if (gfc_match_eos () == MATCH_YES
)
8232 m
= gfc_match_name (name
);
8236 if (find_special (name
, &sym
, true))
8239 sym
->attr
.ext_attr
|= attr
.ext_attr
;
8241 if (gfc_match_eos () == MATCH_YES
)
8244 if (gfc_match_char (',') != MATCH_YES
)
8251 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");