1 /* Declaration statement matcher
2 Copyright (C) 2002-2013 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
28 #include "constructor.h"
30 #include "stringpool.h"
32 /* Macros to access allocate memory for gfc_data_variable,
33 gfc_data_value and gfc_data. */
34 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
35 #define gfc_get_data_value() XCNEW (gfc_data_value)
36 #define gfc_get_data() XCNEW (gfc_data)
39 static bool set_binding_label (const char **, const char *, int);
42 /* This flag is set if an old-style length selector is matched
43 during a type-declaration statement. */
45 static int old_char_selector
;
47 /* When variables acquire types and attributes from a declaration
48 statement, they get them from the following static variables. The
49 first part of a declaration sets these variables and the second
50 part copies these into symbol structures. */
52 static gfc_typespec current_ts
;
54 static symbol_attribute current_attr
;
55 static gfc_array_spec
*current_as
;
56 static int colon_seen
;
58 /* The current binding label (if any). */
59 static const char* curr_binding_label
;
60 /* Need to know how many identifiers are on the current data declaration
61 line in case we're given the BIND(C) attribute with a NAME= specifier. */
62 static int num_idents_on_line
;
63 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
64 can supply a name if the curr_binding_label is nil and NAME= was not. */
65 static int has_name_equals
= 0;
67 /* Initializer of the previous enumerator. */
69 static gfc_expr
*last_initializer
;
71 /* History of all the enumerators is maintained, so that
72 kind values of all the enumerators could be updated depending
73 upon the maximum initialized value. */
75 typedef struct enumerator_history
78 gfc_expr
*initializer
;
79 struct enumerator_history
*next
;
83 /* Header of enum history chain. */
85 static enumerator_history
*enum_history
= NULL
;
87 /* Pointer of enum history node containing largest initializer. */
89 static enumerator_history
*max_enum
= NULL
;
91 /* gfc_new_block points to the symbol of a newly matched block. */
93 gfc_symbol
*gfc_new_block
;
95 bool gfc_matching_function
;
98 /********************* DATA statement subroutines *********************/
100 static bool in_match_data
= false;
103 gfc_in_match_data (void)
105 return in_match_data
;
109 set_in_match_data (bool set_value
)
111 in_match_data
= set_value
;
114 /* Free a gfc_data_variable structure and everything beneath it. */
117 free_variable (gfc_data_variable
*p
)
119 gfc_data_variable
*q
;
124 gfc_free_expr (p
->expr
);
125 gfc_free_iterator (&p
->iter
, 0);
126 free_variable (p
->list
);
132 /* Free a gfc_data_value structure and everything beneath it. */
135 free_value (gfc_data_value
*p
)
142 mpz_clear (p
->repeat
);
143 gfc_free_expr (p
->expr
);
149 /* Free a list of gfc_data structures. */
152 gfc_free_data (gfc_data
*p
)
159 free_variable (p
->var
);
160 free_value (p
->value
);
166 /* Free all data in a namespace. */
169 gfc_free_data_all (gfc_namespace
*ns
)
182 static match
var_element (gfc_data_variable
*);
184 /* Match a list of variables terminated by an iterator and a right
188 var_list (gfc_data_variable
*parent
)
190 gfc_data_variable
*tail
, var
;
193 m
= var_element (&var
);
194 if (m
== MATCH_ERROR
)
199 tail
= gfc_get_data_variable ();
206 if (gfc_match_char (',') != MATCH_YES
)
209 m
= gfc_match_iterator (&parent
->iter
, 1);
212 if (m
== MATCH_ERROR
)
215 m
= var_element (&var
);
216 if (m
== MATCH_ERROR
)
221 tail
->next
= gfc_get_data_variable ();
227 if (gfc_match_char (')') != MATCH_YES
)
232 gfc_syntax_error (ST_DATA
);
237 /* Match a single element in a data variable list, which can be a
238 variable-iterator list. */
241 var_element (gfc_data_variable
*new_var
)
246 memset (new_var
, 0, sizeof (gfc_data_variable
));
248 if (gfc_match_char ('(') == MATCH_YES
)
249 return var_list (new_var
);
251 m
= gfc_match_variable (&new_var
->expr
, 0);
255 sym
= new_var
->expr
->symtree
->n
.sym
;
257 /* Symbol should already have an associated type. */
258 if (!gfc_check_symbol_typed (sym
, gfc_current_ns
, false, gfc_current_locus
))
261 if (!sym
->attr
.function
&& gfc_current_ns
->parent
262 && gfc_current_ns
->parent
== sym
->ns
)
264 gfc_error ("Host associated variable '%s' may not be in the DATA "
265 "statement at %C", sym
->name
);
269 if (gfc_current_state () != COMP_BLOCK_DATA
270 && sym
->attr
.in_common
271 && !gfc_notify_std (GFC_STD_GNU
, "initialization of "
272 "common block variable '%s' in DATA statement at %C",
276 if (!gfc_add_data (&sym
->attr
, sym
->name
, &new_var
->expr
->where
))
283 /* Match the top-level list of data variables. */
286 top_var_list (gfc_data
*d
)
288 gfc_data_variable var
, *tail
, *new_var
;
295 m
= var_element (&var
);
298 if (m
== MATCH_ERROR
)
301 new_var
= gfc_get_data_variable ();
307 tail
->next
= new_var
;
311 if (gfc_match_char ('/') == MATCH_YES
)
313 if (gfc_match_char (',') != MATCH_YES
)
320 gfc_syntax_error (ST_DATA
);
321 gfc_free_data_all (gfc_current_ns
);
327 match_data_constant (gfc_expr
**result
)
329 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
330 gfc_symbol
*sym
, *dt_sym
= NULL
;
335 m
= gfc_match_literal_constant (&expr
, 1);
342 if (m
== MATCH_ERROR
)
345 m
= gfc_match_null (result
);
349 old_loc
= gfc_current_locus
;
351 /* Should this be a structure component, try to match it
352 before matching a name. */
353 m
= gfc_match_rvalue (result
);
354 if (m
== MATCH_ERROR
)
357 if (m
== MATCH_YES
&& (*result
)->expr_type
== EXPR_STRUCTURE
)
359 if (!gfc_simplify_expr (*result
, 0))
363 else if (m
== MATCH_YES
)
364 gfc_free_expr (*result
);
366 gfc_current_locus
= old_loc
;
368 m
= gfc_match_name (name
);
372 if (gfc_find_symbol (name
, NULL
, 1, &sym
))
375 if (sym
&& sym
->attr
.generic
)
376 dt_sym
= gfc_find_dt_in_generic (sym
);
379 || (sym
->attr
.flavor
!= FL_PARAMETER
380 && (!dt_sym
|| dt_sym
->attr
.flavor
!= FL_DERIVED
)))
382 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
386 else if (dt_sym
&& dt_sym
->attr
.flavor
== FL_DERIVED
)
387 return gfc_match_structure_constructor (dt_sym
, result
);
389 /* Check to see if the value is an initialization array expression. */
390 if (sym
->value
->expr_type
== EXPR_ARRAY
)
392 gfc_current_locus
= old_loc
;
394 m
= gfc_match_init_expr (result
);
395 if (m
== MATCH_ERROR
)
400 if (!gfc_simplify_expr (*result
, 0))
403 if ((*result
)->expr_type
== EXPR_CONSTANT
)
407 gfc_error ("Invalid initializer %s in Data statement at %C", name
);
413 *result
= gfc_copy_expr (sym
->value
);
418 /* Match a list of values in a DATA statement. The leading '/' has
419 already been seen at this point. */
422 top_val_list (gfc_data
*data
)
424 gfc_data_value
*new_val
, *tail
;
432 m
= match_data_constant (&expr
);
435 if (m
== MATCH_ERROR
)
438 new_val
= gfc_get_data_value ();
439 mpz_init (new_val
->repeat
);
442 data
->value
= new_val
;
444 tail
->next
= new_val
;
448 if (expr
->ts
.type
!= BT_INTEGER
|| gfc_match_char ('*') != MATCH_YES
)
451 mpz_set_ui (tail
->repeat
, 1);
455 mpz_set (tail
->repeat
, expr
->value
.integer
);
456 gfc_free_expr (expr
);
458 m
= match_data_constant (&tail
->expr
);
461 if (m
== MATCH_ERROR
)
465 if (gfc_match_char ('/') == MATCH_YES
)
467 if (gfc_match_char (',') == MATCH_NO
)
474 gfc_syntax_error (ST_DATA
);
475 gfc_free_data_all (gfc_current_ns
);
480 /* Matches an old style initialization. */
483 match_old_style_init (const char *name
)
490 /* Set up data structure to hold initializers. */
491 gfc_find_sym_tree (name
, NULL
, 0, &st
);
494 newdata
= gfc_get_data ();
495 newdata
->var
= gfc_get_data_variable ();
496 newdata
->var
->expr
= gfc_get_variable_expr (st
);
497 newdata
->where
= gfc_current_locus
;
499 /* Match initial value list. This also eats the terminal '/'. */
500 m
= top_val_list (newdata
);
509 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
514 if (gfc_implicit_pure (NULL
))
515 gfc_current_ns
->proc_name
->attr
.implicit_pure
= 0;
517 /* Mark the variable as having appeared in a data statement. */
518 if (!gfc_add_data (&sym
->attr
, sym
->name
, &sym
->declared_at
))
524 /* Chain in namespace list of DATA initializers. */
525 newdata
->next
= gfc_current_ns
->data
;
526 gfc_current_ns
->data
= newdata
;
532 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
533 we are matching a DATA statement and are therefore issuing an error
534 if we encounter something unexpected, if not, we're trying to match
535 an old-style initialization expression of the form INTEGER I /2/. */
538 gfc_match_data (void)
543 set_in_match_data (true);
547 new_data
= gfc_get_data ();
548 new_data
->where
= gfc_current_locus
;
550 m
= top_var_list (new_data
);
554 m
= top_val_list (new_data
);
558 new_data
->next
= gfc_current_ns
->data
;
559 gfc_current_ns
->data
= new_data
;
561 if (gfc_match_eos () == MATCH_YES
)
564 gfc_match_char (','); /* Optional comma */
567 set_in_match_data (false);
571 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
575 if (gfc_implicit_pure (NULL
))
576 gfc_current_ns
->proc_name
->attr
.implicit_pure
= 0;
581 set_in_match_data (false);
582 gfc_free_data (new_data
);
587 /************************ Declaration statements *********************/
590 /* Auxiliary function to merge DIMENSION and CODIMENSION array specs. */
593 merge_array_spec (gfc_array_spec
*from
, gfc_array_spec
*to
, bool copy
)
597 if ((from
->type
== AS_ASSUMED_RANK
&& to
->corank
)
598 || (to
->type
== AS_ASSUMED_RANK
&& from
->corank
))
600 gfc_error ("The assumed-rank array at %C shall not have a codimension");
604 if (to
->rank
== 0 && from
->rank
> 0)
606 to
->rank
= from
->rank
;
607 to
->type
= from
->type
;
608 to
->cray_pointee
= from
->cray_pointee
;
609 to
->cp_was_assumed
= from
->cp_was_assumed
;
611 for (i
= 0; i
< to
->corank
; i
++)
613 to
->lower
[from
->rank
+ i
] = to
->lower
[i
];
614 to
->upper
[from
->rank
+ i
] = to
->upper
[i
];
616 for (i
= 0; i
< from
->rank
; i
++)
620 to
->lower
[i
] = gfc_copy_expr (from
->lower
[i
]);
621 to
->upper
[i
] = gfc_copy_expr (from
->upper
[i
]);
625 to
->lower
[i
] = from
->lower
[i
];
626 to
->upper
[i
] = from
->upper
[i
];
630 else if (to
->corank
== 0 && from
->corank
> 0)
632 to
->corank
= from
->corank
;
633 to
->cotype
= from
->cotype
;
635 for (i
= 0; i
< from
->corank
; i
++)
639 to
->lower
[to
->rank
+ i
] = gfc_copy_expr (from
->lower
[i
]);
640 to
->upper
[to
->rank
+ i
] = gfc_copy_expr (from
->upper
[i
]);
644 to
->lower
[to
->rank
+ i
] = from
->lower
[i
];
645 to
->upper
[to
->rank
+ i
] = from
->upper
[i
];
654 /* Match an intent specification. Since this can only happen after an
655 INTENT word, a legal intent-spec must follow. */
658 match_intent_spec (void)
661 if (gfc_match (" ( in out )") == MATCH_YES
)
663 if (gfc_match (" ( in )") == MATCH_YES
)
665 if (gfc_match (" ( out )") == MATCH_YES
)
668 gfc_error ("Bad INTENT specification at %C");
669 return INTENT_UNKNOWN
;
673 /* Matches a character length specification, which is either a
674 specification expression, '*', or ':'. */
677 char_len_param_value (gfc_expr
**expr
, bool *deferred
)
684 if (gfc_match_char ('*') == MATCH_YES
)
687 if (gfc_match_char (':') == MATCH_YES
)
689 if (!gfc_notify_std (GFC_STD_F2003
, "deferred type "
698 m
= gfc_match_expr (expr
);
701 && !gfc_expr_check_typed (*expr
, gfc_current_ns
, false))
704 if (m
== MATCH_YES
&& (*expr
)->expr_type
== EXPR_FUNCTION
)
706 if ((*expr
)->value
.function
.actual
707 && (*expr
)->value
.function
.actual
->expr
->symtree
)
710 e
= (*expr
)->value
.function
.actual
->expr
;
711 if (e
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
712 && e
->expr_type
== EXPR_VARIABLE
)
714 if (e
->symtree
->n
.sym
->ts
.type
== BT_UNKNOWN
)
716 if (e
->symtree
->n
.sym
->ts
.type
== BT_CHARACTER
717 && e
->symtree
->n
.sym
->ts
.u
.cl
718 && e
->symtree
->n
.sym
->ts
.u
.cl
->length
->ts
.type
== BT_UNKNOWN
)
726 gfc_error ("Conflict in attributes of function argument at %C");
731 /* A character length is a '*' followed by a literal integer or a
732 char_len_param_value in parenthesis. */
735 match_char_length (gfc_expr
**expr
, bool *deferred
, bool obsolescent_check
)
741 m
= gfc_match_char ('*');
745 m
= gfc_match_small_literal_int (&length
, NULL
);
746 if (m
== MATCH_ERROR
)
751 if (obsolescent_check
752 && !gfc_notify_std (GFC_STD_F95_OBS
, "Old-style character length at %C"))
754 *expr
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, length
);
758 if (gfc_match_char ('(') == MATCH_NO
)
761 m
= char_len_param_value (expr
, deferred
);
762 if (m
!= MATCH_YES
&& gfc_matching_function
)
768 if (m
== MATCH_ERROR
)
773 if (gfc_match_char (')') == MATCH_NO
)
775 gfc_free_expr (*expr
);
783 gfc_error ("Syntax error in character length specification at %C");
788 /* Special subroutine for finding a symbol. Check if the name is found
789 in the current name space. If not, and we're compiling a function or
790 subroutine and the parent compilation unit is an interface, then check
791 to see if the name we've been given is the name of the interface
792 (located in another namespace). */
795 find_special (const char *name
, gfc_symbol
**result
, bool allow_subroutine
)
801 i
= gfc_get_sym_tree (name
, NULL
, &st
, allow_subroutine
);
804 *result
= st
? st
->n
.sym
: NULL
;
808 if (gfc_current_state () != COMP_SUBROUTINE
809 && gfc_current_state () != COMP_FUNCTION
)
812 s
= gfc_state_stack
->previous
;
816 if (s
->state
!= COMP_INTERFACE
)
819 goto end
; /* Nameless interface. */
821 if (strcmp (name
, s
->sym
->name
) == 0)
832 /* Special subroutine for getting a symbol node associated with a
833 procedure name, used in SUBROUTINE and FUNCTION statements. The
834 symbol is created in the parent using with symtree node in the
835 child unit pointing to the symbol. If the current namespace has no
836 parent, then the symbol is just created in the current unit. */
839 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
845 /* Module functions have to be left in their own namespace because
846 they have potentially (almost certainly!) already been referenced.
847 In this sense, they are rather like external functions. This is
848 fixed up in resolve.c(resolve_entries), where the symbol name-
849 space is set to point to the master function, so that the fake
850 result mechanism can work. */
851 if (module_fcn_entry
)
853 /* Present if entry is declared to be a module procedure. */
854 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
857 rc
= gfc_get_symbol (name
, NULL
, result
);
858 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
859 && (*result
)->ts
.type
== BT_UNKNOWN
860 && sym
->attr
.flavor
== FL_UNKNOWN
)
861 /* Pick up the typespec for the entry, if declared in the function
862 body. Note that this symbol is FL_UNKNOWN because it will
863 only have appeared in a type declaration. The local symtree
864 is set to point to the module symbol and a unique symtree
865 to the local version. This latter ensures a correct clearing
868 /* If the ENTRY proceeds its specification, we need to ensure
869 that this does not raise a "has no IMPLICIT type" error. */
870 if (sym
->ts
.type
== BT_UNKNOWN
)
871 sym
->attr
.untyped
= 1;
873 (*result
)->ts
= sym
->ts
;
875 /* Put the symbol in the procedure namespace so that, should
876 the ENTRY precede its specification, the specification
878 (*result
)->ns
= gfc_current_ns
;
880 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
882 st
= gfc_get_unique_symtree (gfc_current_ns
);
887 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
894 if (sym
&& !sym
->gfc_new
&& gfc_current_state () != COMP_INTERFACE
)
896 /* Trap another encompassed procedure with the same name. All
897 these conditions are necessary to avoid picking up an entry
898 whose name clashes with that of the encompassing procedure;
899 this is handled using gsymbols to register unique,globally
901 if (sym
->attr
.flavor
!= 0
902 && sym
->attr
.proc
!= 0
903 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
904 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
905 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
906 name
, &sym
->declared_at
);
908 /* Trap a procedure with a name the same as interface in the
909 encompassing scope. */
910 if (sym
->attr
.generic
!= 0
911 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
912 && !sym
->attr
.mod_proc
)
913 gfc_error_now ("Name '%s' at %C is already defined"
914 " as a generic interface at %L",
915 name
, &sym
->declared_at
);
917 /* Trap declarations of attributes in encompassing scope. The
918 signature for this is that ts.kind is set. Legitimate
919 references only set ts.type. */
920 if (sym
->ts
.kind
!= 0
921 && !sym
->attr
.implicit_type
922 && sym
->attr
.proc
== 0
923 && gfc_current_ns
->parent
!= NULL
924 && sym
->attr
.access
== 0
925 && !module_fcn_entry
)
926 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
927 "and must not have attributes declared at %L",
928 name
, &sym
->declared_at
);
931 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
934 /* Module function entries will already have a symtree in
935 the current namespace but will need one at module level. */
936 if (module_fcn_entry
)
938 /* Present if entry is declared to be a module procedure. */
939 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
941 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
944 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
949 /* See if the procedure should be a module procedure. */
951 if (((sym
->ns
->proc_name
!= NULL
952 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
953 && sym
->attr
.proc
!= PROC_MODULE
)
954 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
955 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
962 /* Verify that the given symbol representing a parameter is C
963 interoperable, by checking to see if it was marked as such after
964 its declaration. If the given symbol is not interoperable, a
965 warning is reported, thus removing the need to return the status to
966 the calling function. The standard does not require the user use
967 one of the iso_c_binding named constants to declare an
968 interoperable parameter, but we can't be sure if the param is C
969 interop or not if the user doesn't. For example, integer(4) may be
970 legal Fortran, but doesn't have meaning in C. It may interop with
971 a number of the C types, which causes a problem because the
972 compiler can't know which one. This code is almost certainly not
973 portable, and the user will get what they deserve if the C type
974 across platforms isn't always interoperable with integer(4). If
975 the user had used something like integer(c_int) or integer(c_long),
976 the compiler could have automatically handled the varying sizes
980 gfc_verify_c_interop_param (gfc_symbol
*sym
)
982 int is_c_interop
= 0;
985 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
986 Don't repeat the checks here. */
987 if (sym
->attr
.implicit_type
)
990 /* For subroutines or functions that are passed to a BIND(C) procedure,
991 they're interoperable if they're BIND(C) and their params are all
993 if (sym
->attr
.flavor
== FL_PROCEDURE
)
995 if (sym
->attr
.is_bind_c
== 0)
997 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
998 "attribute to be C interoperable", sym
->name
,
999 &(sym
->declared_at
));
1005 if (sym
->attr
.is_c_interop
== 1)
1006 /* We've already checked this procedure; don't check it again. */
1009 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
1014 /* See if we've stored a reference to a procedure that owns sym. */
1015 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
1017 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
1019 is_c_interop
= (gfc_verify_c_interop(&(sym
->ts
)) ? 1 : 0);
1021 if (is_c_interop
!= 1)
1023 /* Make personalized messages to give better feedback. */
1024 if (sym
->ts
.type
== BT_DERIVED
)
1025 gfc_error ("Variable '%s' at %L is a dummy argument to the "
1026 "BIND(C) procedure '%s' but is not C interoperable "
1027 "because derived type '%s' is not C interoperable",
1028 sym
->name
, &(sym
->declared_at
),
1029 sym
->ns
->proc_name
->name
,
1030 sym
->ts
.u
.derived
->name
);
1031 else if (sym
->ts
.type
== BT_CLASS
)
1032 gfc_error ("Variable '%s' at %L is a dummy argument to the "
1033 "BIND(C) procedure '%s' but is not C interoperable "
1034 "because it is polymorphic",
1035 sym
->name
, &(sym
->declared_at
),
1036 sym
->ns
->proc_name
->name
);
1037 else if (gfc_option
.warn_c_binding_type
)
1038 gfc_warning ("Variable '%s' at %L is a dummy argument of the "
1039 "BIND(C) procedure '%s' but may not be C "
1041 sym
->name
, &(sym
->declared_at
),
1042 sym
->ns
->proc_name
->name
);
1045 /* Character strings are only C interoperable if they have a
1047 if (sym
->ts
.type
== BT_CHARACTER
)
1049 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
1050 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
1051 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
1053 gfc_error ("Character argument '%s' at %L "
1054 "must be length 1 because "
1055 "procedure '%s' is BIND(C)",
1056 sym
->name
, &sym
->declared_at
,
1057 sym
->ns
->proc_name
->name
);
1062 /* We have to make sure that any param to a bind(c) routine does
1063 not have the allocatable, pointer, or optional attributes,
1064 according to J3/04-007, section 5.1. */
1065 if (sym
->attr
.allocatable
== 1
1066 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable '%s' at %L with "
1067 "ALLOCATABLE attribute in procedure '%s' "
1068 "with BIND(C)", sym
->name
,
1069 &(sym
->declared_at
),
1070 sym
->ns
->proc_name
->name
))
1073 if (sym
->attr
.pointer
== 1
1074 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable '%s' at %L with "
1075 "POINTER attribute in procedure '%s' "
1076 "with BIND(C)", sym
->name
,
1077 &(sym
->declared_at
),
1078 sym
->ns
->proc_name
->name
))
1081 if ((sym
->attr
.allocatable
|| sym
->attr
.pointer
) && !sym
->as
)
1083 gfc_error ("Scalar variable '%s' at %L with POINTER or "
1084 "ALLOCATABLE in procedure '%s' with BIND(C) is not yet"
1085 " supported", sym
->name
, &(sym
->declared_at
),
1086 sym
->ns
->proc_name
->name
);
1090 if (sym
->attr
.optional
== 1 && sym
->attr
.value
)
1092 gfc_error ("Variable '%s' at %L cannot have both the OPTIONAL "
1093 "and the VALUE attribute because procedure '%s' "
1094 "is BIND(C)", sym
->name
, &(sym
->declared_at
),
1095 sym
->ns
->proc_name
->name
);
1098 else if (sym
->attr
.optional
== 1
1099 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable '%s' "
1100 "at %L with OPTIONAL attribute in "
1101 "procedure '%s' which is BIND(C)",
1102 sym
->name
, &(sym
->declared_at
),
1103 sym
->ns
->proc_name
->name
))
1106 /* Make sure that if it has the dimension attribute, that it is
1107 either assumed size or explicit shape. Deferred shape is already
1108 covered by the pointer/allocatable attribute. */
1109 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SHAPE
1110 && !gfc_notify_std (GFC_STD_F2008_TS
, "Assumed-shape array '%s' "
1111 "at %L as dummy argument to the BIND(C) "
1112 "procedure '%s' at %L", sym
->name
,
1113 &(sym
->declared_at
),
1114 sym
->ns
->proc_name
->name
,
1115 &(sym
->ns
->proc_name
->declared_at
)))
1125 /* Function called by variable_decl() that adds a name to the symbol table. */
1128 build_sym (const char *name
, gfc_charlen
*cl
, bool cl_deferred
,
1129 gfc_array_spec
**as
, locus
*var_locus
)
1131 symbol_attribute attr
;
1134 if (gfc_get_symbol (name
, NULL
, &sym
))
1137 /* Start updating the symbol table. Add basic type attribute if present. */
1138 if (current_ts
.type
!= BT_UNKNOWN
1139 && (sym
->attr
.implicit_type
== 0
1140 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1141 && !gfc_add_type (sym
, ¤t_ts
, var_locus
))
1144 if (sym
->ts
.type
== BT_CHARACTER
)
1147 sym
->ts
.deferred
= cl_deferred
;
1150 /* Add dimension attribute if present. */
1151 if (!gfc_set_array_spec (sym
, *as
, var_locus
))
1155 /* Add attribute to symbol. The copy is so that we can reset the
1156 dimension attribute. */
1157 attr
= current_attr
;
1159 attr
.codimension
= 0;
1161 if (!gfc_copy_attr (&sym
->attr
, &attr
, var_locus
))
1164 /* Finish any work that may need to be done for the binding label,
1165 if it's a bind(c). The bind(c) attr is found before the symbol
1166 is made, and before the symbol name (for data decls), so the
1167 current_ts is holding the binding label, or nothing if the
1168 name= attr wasn't given. Therefore, test here if we're dealing
1169 with a bind(c) and make sure the binding label is set correctly. */
1170 if (sym
->attr
.is_bind_c
== 1)
1172 if (!sym
->binding_label
)
1174 /* Set the binding label and verify that if a NAME= was specified
1175 then only one identifier was in the entity-decl-list. */
1176 if (!set_binding_label (&sym
->binding_label
, sym
->name
,
1177 num_idents_on_line
))
1182 /* See if we know we're in a common block, and if it's a bind(c)
1183 common then we need to make sure we're an interoperable type. */
1184 if (sym
->attr
.in_common
== 1)
1186 /* Test the common block object. */
1187 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1188 && sym
->ts
.is_c_interop
!= 1)
1190 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1191 "must be declared with a C interoperable "
1192 "kind since common block '%s' is BIND(C)",
1193 sym
->name
, sym
->common_block
->name
,
1194 sym
->common_block
->name
);
1199 sym
->attr
.implied_index
= 0;
1201 if (sym
->ts
.type
== BT_CLASS
)
1202 return gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
, false);
1208 /* Set character constant to the given length. The constant will be padded or
1209 truncated. If we're inside an array constructor without a typespec, we
1210 additionally check that all elements have the same length; check_len -1
1211 means no checking. */
1214 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1219 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1220 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1222 slen
= expr
->value
.character
.length
;
1225 s
= gfc_get_wide_string (len
+ 1);
1226 memcpy (s
, expr
->value
.character
.string
,
1227 MIN (len
, slen
) * sizeof (gfc_char_t
));
1229 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1231 if (gfc_option
.warn_character_truncation
&& slen
> len
)
1232 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1233 "(%d/%d)", &expr
->where
, slen
, len
);
1235 /* Apply the standard by 'hand' otherwise it gets cleared for
1237 if (check_len
!= -1 && slen
!= check_len
1238 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1239 gfc_error_now ("The CHARACTER elements of the array constructor "
1240 "at %L must have the same length (%d/%d)",
1241 &expr
->where
, slen
, check_len
);
1244 free (expr
->value
.character
.string
);
1245 expr
->value
.character
.string
= s
;
1246 expr
->value
.character
.length
= len
;
1251 /* Function to create and update the enumerator history
1252 using the information passed as arguments.
1253 Pointer "max_enum" is also updated, to point to
1254 enum history node containing largest initializer.
1256 SYM points to the symbol node of enumerator.
1257 INIT points to its enumerator value. */
1260 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1262 enumerator_history
*new_enum_history
;
1263 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1265 new_enum_history
= XCNEW (enumerator_history
);
1267 new_enum_history
->sym
= sym
;
1268 new_enum_history
->initializer
= init
;
1269 new_enum_history
->next
= NULL
;
1271 if (enum_history
== NULL
)
1273 enum_history
= new_enum_history
;
1274 max_enum
= enum_history
;
1278 new_enum_history
->next
= enum_history
;
1279 enum_history
= new_enum_history
;
1281 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1282 new_enum_history
->initializer
->value
.integer
) < 0)
1283 max_enum
= new_enum_history
;
1288 /* Function to free enum kind history. */
1291 gfc_free_enum_history (void)
1293 enumerator_history
*current
= enum_history
;
1294 enumerator_history
*next
;
1296 while (current
!= NULL
)
1298 next
= current
->next
;
1303 enum_history
= NULL
;
1307 /* Function called by variable_decl() that adds an initialization
1308 expression to a symbol. */
1311 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1313 symbol_attribute attr
;
1318 if (find_special (name
, &sym
, false))
1323 /* If this symbol is confirming an implicit parameter type,
1324 then an initialization expression is not allowed. */
1325 if (attr
.flavor
== FL_PARAMETER
1326 && sym
->value
!= NULL
1329 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1336 /* An initializer is required for PARAMETER declarations. */
1337 if (attr
.flavor
== FL_PARAMETER
)
1339 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1345 /* If a variable appears in a DATA block, it cannot have an
1349 gfc_error ("Variable '%s' at %C with an initializer already "
1350 "appears in a DATA statement", sym
->name
);
1354 /* Check if the assignment can happen. This has to be put off
1355 until later for derived type variables and procedure pointers. */
1356 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1357 && sym
->ts
.type
!= BT_CLASS
&& init
->ts
.type
!= BT_CLASS
1358 && !sym
->attr
.proc_pointer
1359 && !gfc_check_assign_symbol (sym
, NULL
, init
))
1362 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.u
.cl
1363 && init
->ts
.type
== BT_CHARACTER
)
1365 /* Update symbol character length according initializer. */
1366 if (!gfc_check_assign_symbol (sym
, NULL
, init
))
1369 if (sym
->ts
.u
.cl
->length
== NULL
)
1372 /* If there are multiple CHARACTER variables declared on the
1373 same line, we don't want them to share the same length. */
1374 sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1376 if (sym
->attr
.flavor
== FL_PARAMETER
)
1378 if (init
->expr_type
== EXPR_CONSTANT
)
1380 clen
= init
->value
.character
.length
;
1381 sym
->ts
.u
.cl
->length
1382 = gfc_get_int_expr (gfc_default_integer_kind
,
1385 else if (init
->expr_type
== EXPR_ARRAY
)
1388 c
= gfc_constructor_first (init
->value
.constructor
);
1389 clen
= c
->expr
->value
.character
.length
;
1390 sym
->ts
.u
.cl
->length
1391 = gfc_get_int_expr (gfc_default_integer_kind
,
1394 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
1395 sym
->ts
.u
.cl
->length
=
1396 gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
1399 /* Update initializer character length according symbol. */
1400 else if (sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1402 int len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
1404 if (init
->expr_type
== EXPR_CONSTANT
)
1405 gfc_set_constant_character_len (len
, init
, -1);
1406 else if (init
->expr_type
== EXPR_ARRAY
)
1410 /* Build a new charlen to prevent simplification from
1411 deleting the length before it is resolved. */
1412 init
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1413 init
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->ts
.u
.cl
->length
);
1415 for (c
= gfc_constructor_first (init
->value
.constructor
);
1416 c
; c
= gfc_constructor_next (c
))
1417 gfc_set_constant_character_len (len
, c
->expr
, -1);
1422 /* If sym is implied-shape, set its upper bounds from init. */
1423 if (sym
->attr
.flavor
== FL_PARAMETER
&& sym
->attr
.dimension
1424 && sym
->as
->type
== AS_IMPLIED_SHAPE
)
1428 if (init
->rank
== 0)
1430 gfc_error ("Can't initialize implied-shape array at %L"
1431 " with scalar", &sym
->declared_at
);
1434 gcc_assert (sym
->as
->rank
== init
->rank
);
1436 /* Shape should be present, we get an initialization expression. */
1437 gcc_assert (init
->shape
);
1439 for (dim
= 0; dim
< sym
->as
->rank
; ++dim
)
1445 lower
= sym
->as
->lower
[dim
];
1446 if (lower
->expr_type
!= EXPR_CONSTANT
)
1448 gfc_error ("Non-constant lower bound in implied-shape"
1449 " declaration at %L", &lower
->where
);
1453 /* All dimensions must be without upper bound. */
1454 gcc_assert (!sym
->as
->upper
[dim
]);
1457 e
= gfc_get_constant_expr (BT_INTEGER
, k
, &sym
->declared_at
);
1458 mpz_add (e
->value
.integer
,
1459 lower
->value
.integer
, init
->shape
[dim
]);
1460 mpz_sub_ui (e
->value
.integer
, e
->value
.integer
, 1);
1461 sym
->as
->upper
[dim
] = e
;
1464 sym
->as
->type
= AS_EXPLICIT
;
1467 /* Need to check if the expression we initialized this
1468 to was one of the iso_c_binding named constants. If so,
1469 and we're a parameter (constant), let it be iso_c.
1471 integer(c_int), parameter :: my_int = c_int
1472 integer(my_int) :: my_int_2
1473 If we mark my_int as iso_c (since we can see it's value
1474 is equal to one of the named constants), then my_int_2
1475 will be considered C interoperable. */
1476 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1478 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1479 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1480 /* attr bits needed for module files. */
1481 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1482 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1483 if (init
->ts
.is_iso_c
)
1484 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1487 /* Add initializer. Make sure we keep the ranks sane. */
1488 if (sym
->attr
.dimension
&& init
->rank
== 0)
1493 if (sym
->attr
.flavor
== FL_PARAMETER
1494 && init
->expr_type
== EXPR_CONSTANT
1495 && spec_size (sym
->as
, &size
)
1496 && mpz_cmp_si (size
, 0) > 0)
1498 array
= gfc_get_array_expr (init
->ts
.type
, init
->ts
.kind
,
1500 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1501 gfc_constructor_append_expr (&array
->value
.constructor
,
1504 : gfc_copy_expr (init
),
1507 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1508 for (n
= 0; n
< sym
->as
->rank
; n
++)
1509 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1514 init
->rank
= sym
->as
->rank
;
1518 if (sym
->attr
.save
== SAVE_NONE
)
1519 sym
->attr
.save
= SAVE_IMPLICIT
;
1527 /* Function called by variable_decl() that adds a name to a structure
1531 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1532 gfc_array_spec
**as
)
1537 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1538 constructing, it must have the pointer attribute. */
1539 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1540 && current_ts
.u
.derived
== gfc_current_block ()
1541 && current_attr
.pointer
== 0)
1543 gfc_error ("Component at %C must have the POINTER attribute");
1547 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1549 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1551 gfc_error ("Array component of structure at %C must have explicit "
1552 "or deferred shape");
1557 if (!gfc_add_component (gfc_current_block(), name
, &c
))
1561 if (c
->ts
.type
== BT_CHARACTER
)
1563 c
->attr
= current_attr
;
1565 c
->initializer
= *init
;
1572 c
->attr
.codimension
= 1;
1574 c
->attr
.dimension
= 1;
1578 /* Should this ever get more complicated, combine with similar section
1579 in add_init_expr_to_sym into a separate function. */
1580 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
1582 && c
->ts
.u
.cl
->length
&& c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1586 gcc_assert (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
);
1587 gcc_assert (c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1588 gcc_assert (c
->ts
.u
.cl
->length
->ts
.type
== BT_INTEGER
);
1590 len
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
1592 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1593 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1594 else if (mpz_cmp (c
->ts
.u
.cl
->length
->value
.integer
,
1595 c
->initializer
->ts
.u
.cl
->length
->value
.integer
))
1597 gfc_constructor
*ctor
;
1598 ctor
= gfc_constructor_first (c
->initializer
->value
.constructor
);
1603 bool has_ts
= (c
->initializer
->ts
.u
.cl
1604 && c
->initializer
->ts
.u
.cl
->length_from_typespec
);
1606 /* Remember the length of the first element for checking
1607 that all elements *in the constructor* have the same
1608 length. This need not be the length of the LHS! */
1609 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1610 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1611 first_len
= ctor
->expr
->value
.character
.length
;
1613 for ( ; ctor
; ctor
= gfc_constructor_next (ctor
))
1614 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1616 gfc_set_constant_character_len (len
, ctor
->expr
,
1617 has_ts
? -1 : first_len
);
1618 ctor
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (c
->ts
.u
.cl
->length
);
1624 /* Check array components. */
1625 if (!c
->attr
.dimension
)
1628 if (c
->attr
.pointer
)
1630 if (c
->as
->type
!= AS_DEFERRED
)
1632 gfc_error ("Pointer array component of structure at %C must have a "
1637 else if (c
->attr
.allocatable
)
1639 if (c
->as
->type
!= AS_DEFERRED
)
1641 gfc_error ("Allocatable component of structure at %C must have a "
1648 if (c
->as
->type
!= AS_EXPLICIT
)
1650 gfc_error ("Array component of structure at %C must have an "
1657 if (c
->ts
.type
== BT_CLASS
)
1659 bool delayed
= (gfc_state_stack
->sym
== c
->ts
.u
.derived
)
1660 || (!c
->ts
.u
.derived
->components
1661 && !c
->ts
.u
.derived
->attr
.zero_comp
);
1662 bool t2
= gfc_build_class_symbol (&c
->ts
, &c
->attr
, &c
->as
, delayed
);
1672 /* Match a 'NULL()', and possibly take care of some side effects. */
1675 gfc_match_null (gfc_expr
**result
)
1678 match m
, m2
= MATCH_NO
;
1680 if ((m
= gfc_match (" null ( )")) == MATCH_ERROR
)
1686 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1688 if ((m2
= gfc_match (" null (")) != MATCH_YES
)
1691 old_loc
= gfc_current_locus
;
1692 if ((m2
= gfc_match (" %n ) ", name
)) == MATCH_ERROR
)
1695 && ((m2
= gfc_match (" mold = %n )", name
)) == MATCH_ERROR
))
1699 gfc_current_locus
= old_loc
;
1704 /* The NULL symbol now has to be/become an intrinsic function. */
1705 if (gfc_get_symbol ("null", NULL
, &sym
))
1707 gfc_error ("NULL() initialization at %C is ambiguous");
1711 gfc_intrinsic_symbol (sym
);
1713 if (sym
->attr
.proc
!= PROC_INTRINSIC
1714 && !(sym
->attr
.use_assoc
&& sym
->attr
.intrinsic
)
1715 && (!gfc_add_procedure(&sym
->attr
, PROC_INTRINSIC
, sym
->name
, NULL
)
1716 || !gfc_add_function (&sym
->attr
, sym
->name
, NULL
)))
1719 *result
= gfc_get_null_expr (&gfc_current_locus
);
1721 /* Invalid per F2008, C512. */
1722 if (m2
== MATCH_YES
)
1724 gfc_error ("NULL() initialization at %C may not have MOLD");
1732 /* Match the initialization expr for a data pointer or procedure pointer. */
1735 match_pointer_init (gfc_expr
**init
, int procptr
)
1739 if (gfc_pure (NULL
) && gfc_state_stack
->state
!= COMP_DERIVED
)
1741 gfc_error ("Initialization of pointer at %C is not allowed in "
1742 "a PURE procedure");
1746 /* Match NULL() initialization. */
1747 m
= gfc_match_null (init
);
1751 /* Match non-NULL initialization. */
1752 gfc_matching_ptr_assignment
= !procptr
;
1753 gfc_matching_procptr_assignment
= procptr
;
1754 m
= gfc_match_rvalue (init
);
1755 gfc_matching_ptr_assignment
= 0;
1756 gfc_matching_procptr_assignment
= 0;
1757 if (m
== MATCH_ERROR
)
1759 else if (m
== MATCH_NO
)
1761 gfc_error ("Error in pointer initialization at %C");
1766 gfc_resolve_expr (*init
);
1768 if (!gfc_notify_std (GFC_STD_F2008
, "non-NULL pointer "
1769 "initialization at %C"))
1777 check_function_name (char *name
)
1779 /* In functions that have a RESULT variable defined, the function name always
1780 refers to function calls. Therefore, the name is not allowed to appear in
1781 specification statements. When checking this, be careful about
1782 'hidden' procedure pointer results ('ppr@'). */
1784 if (gfc_current_state () == COMP_FUNCTION
)
1786 gfc_symbol
*block
= gfc_current_block ();
1787 if (block
&& block
->result
&& block
->result
!= block
1788 && strcmp (block
->result
->name
, "ppr@") != 0
1789 && strcmp (block
->name
, name
) == 0)
1791 gfc_error ("Function name '%s' not allowed at %C", name
);
1800 /* Match a variable name with an optional initializer. When this
1801 subroutine is called, a variable is expected to be parsed next.
1802 Depending on what is happening at the moment, updates either the
1803 symbol table or the current interface. */
1806 variable_decl (int elem
)
1808 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1809 gfc_expr
*initializer
, *char_len
;
1811 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1823 /* When we get here, we've just matched a list of attributes and
1824 maybe a type and a double colon. The next thing we expect to see
1825 is the name of the symbol. */
1826 m
= gfc_match_name (name
);
1830 var_locus
= gfc_current_locus
;
1832 /* Now we could see the optional array spec. or character length. */
1833 m
= gfc_match_array_spec (&as
, true, true);
1834 if (m
== MATCH_ERROR
)
1838 as
= gfc_copy_array_spec (current_as
);
1840 && !merge_array_spec (current_as
, as
, true))
1846 if (gfc_option
.flag_cray_pointer
)
1847 cp_as
= gfc_copy_array_spec (as
);
1849 /* At this point, we know for sure if the symbol is PARAMETER and can thus
1850 determine (and check) whether it can be implied-shape. If it
1851 was parsed as assumed-size, change it because PARAMETERs can not
1855 if (as
->type
== AS_IMPLIED_SHAPE
&& current_attr
.flavor
!= FL_PARAMETER
)
1858 gfc_error ("Non-PARAMETER symbol '%s' at %L can't be implied-shape",
1863 if (as
->type
== AS_ASSUMED_SIZE
&& as
->rank
== 1
1864 && current_attr
.flavor
== FL_PARAMETER
)
1865 as
->type
= AS_IMPLIED_SHAPE
;
1867 if (as
->type
== AS_IMPLIED_SHAPE
1868 && !gfc_notify_std (GFC_STD_F2008
, "Implied-shape array at %L",
1878 cl_deferred
= false;
1880 if (current_ts
.type
== BT_CHARACTER
)
1882 switch (match_char_length (&char_len
, &cl_deferred
, false))
1885 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1887 cl
->length
= char_len
;
1890 /* Non-constant lengths need to be copied after the first
1891 element. Also copy assumed lengths. */
1894 && (current_ts
.u
.cl
->length
== NULL
1895 || current_ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1897 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1898 cl
->length
= gfc_copy_expr (current_ts
.u
.cl
->length
);
1901 cl
= current_ts
.u
.cl
;
1903 cl_deferred
= current_ts
.deferred
;
1912 /* If this symbol has already shown up in a Cray Pointer declaration,
1913 then we want to set the type & bail out. */
1914 if (gfc_option
.flag_cray_pointer
)
1916 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1917 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
1919 sym
->ts
.type
= current_ts
.type
;
1920 sym
->ts
.kind
= current_ts
.kind
;
1922 sym
->ts
.u
.derived
= current_ts
.u
.derived
;
1923 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
1924 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
1927 /* Check to see if we have an array specification. */
1930 if (sym
->as
!= NULL
)
1932 gfc_error ("Duplicate array spec for Cray pointee at %C");
1933 gfc_free_array_spec (cp_as
);
1939 if (!gfc_set_array_spec (sym
, cp_as
, &var_locus
))
1940 gfc_internal_error ("Couldn't set pointee array spec.");
1942 /* Fix the array spec. */
1943 m
= gfc_mod_pointee_as (sym
->as
);
1944 if (m
== MATCH_ERROR
)
1952 gfc_free_array_spec (cp_as
);
1956 /* Procedure pointer as function result. */
1957 if (gfc_current_state () == COMP_FUNCTION
1958 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
1959 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
1960 strcpy (name
, "ppr@");
1962 if (gfc_current_state () == COMP_FUNCTION
1963 && strcmp (name
, gfc_current_block ()->name
) == 0
1964 && gfc_current_block ()->result
1965 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
1966 strcpy (name
, "ppr@");
1968 /* OK, we've successfully matched the declaration. Now put the
1969 symbol in the current namespace, because it might be used in the
1970 optional initialization expression for this symbol, e.g. this is
1973 integer, parameter :: i = huge(i)
1975 This is only true for parameters or variables of a basic type.
1976 For components of derived types, it is not true, so we don't
1977 create a symbol for those yet. If we fail to create the symbol,
1979 if (gfc_current_state () != COMP_DERIVED
1980 && !build_sym (name
, cl
, cl_deferred
, &as
, &var_locus
))
1986 if (!check_function_name (name
))
1992 /* We allow old-style initializations of the form
1993 integer i /2/, j(4) /3*3, 1/
1994 (if no colon has been seen). These are different from data
1995 statements in that initializers are only allowed to apply to the
1996 variable immediately preceding, i.e.
1998 is not allowed. Therefore we have to do some work manually, that
1999 could otherwise be left to the matchers for DATA statements. */
2001 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
2003 if (!gfc_notify_std (GFC_STD_GNU
, "Old-style "
2004 "initialization at %C"))
2007 return match_old_style_init (name
);
2010 /* The double colon must be present in order to have initializers.
2011 Otherwise the statement is ambiguous with an assignment statement. */
2014 if (gfc_match (" =>") == MATCH_YES
)
2016 if (!current_attr
.pointer
)
2018 gfc_error ("Initialization at %C isn't for a pointer variable");
2023 m
= match_pointer_init (&initializer
, 0);
2027 else if (gfc_match_char ('=') == MATCH_YES
)
2029 if (current_attr
.pointer
)
2031 gfc_error ("Pointer initialization at %C requires '=>', "
2037 m
= gfc_match_init_expr (&initializer
);
2040 gfc_error ("Expected an initialization expression at %C");
2044 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
)
2045 && gfc_state_stack
->state
!= COMP_DERIVED
)
2047 gfc_error ("Initialization of variable at %C is not allowed in "
2048 "a PURE procedure");
2057 if (initializer
!= NULL
&& current_attr
.allocatable
2058 && gfc_current_state () == COMP_DERIVED
)
2060 gfc_error ("Initialization of allocatable component at %C is not "
2066 /* Add the initializer. Note that it is fine if initializer is
2067 NULL here, because we sometimes also need to check if a
2068 declaration *must* have an initialization expression. */
2069 if (gfc_current_state () != COMP_DERIVED
)
2070 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
2073 if (current_ts
.type
== BT_DERIVED
2074 && !current_attr
.pointer
&& !initializer
)
2075 initializer
= gfc_default_initializer (¤t_ts
);
2076 t
= build_struct (name
, cl
, &initializer
, &as
);
2079 m
= (t
) ? MATCH_YES
: MATCH_ERROR
;
2082 /* Free stuff up and return. */
2083 gfc_free_expr (initializer
);
2084 gfc_free_array_spec (as
);
2090 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
2091 This assumes that the byte size is equal to the kind number for
2092 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
2095 gfc_match_old_kind_spec (gfc_typespec
*ts
)
2100 if (gfc_match_char ('*') != MATCH_YES
)
2103 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
2107 original_kind
= ts
->kind
;
2109 /* Massage the kind numbers for complex types. */
2110 if (ts
->type
== BT_COMPLEX
)
2114 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2115 gfc_basic_typename (ts
->type
), original_kind
);
2122 if (ts
->type
== BT_INTEGER
&& ts
->kind
== 4 && gfc_option
.flag_integer4_kind
== 8)
2125 if (ts
->type
== BT_REAL
|| ts
->type
== BT_COMPLEX
)
2129 if (gfc_option
.flag_real4_kind
== 8)
2131 if (gfc_option
.flag_real4_kind
== 10)
2133 if (gfc_option
.flag_real4_kind
== 16)
2139 if (gfc_option
.flag_real8_kind
== 4)
2141 if (gfc_option
.flag_real8_kind
== 10)
2143 if (gfc_option
.flag_real8_kind
== 16)
2148 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2150 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2151 gfc_basic_typename (ts
->type
), original_kind
);
2155 if (!gfc_notify_std (GFC_STD_GNU
,
2156 "Nonstandard type declaration %s*%d at %C",
2157 gfc_basic_typename(ts
->type
), original_kind
))
2164 /* Match a kind specification. Since kinds are generally optional, we
2165 usually return MATCH_NO if something goes wrong. If a "kind="
2166 string is found, then we know we have an error. */
2169 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
2181 where
= loc
= gfc_current_locus
;
2186 if (gfc_match_char ('(') == MATCH_NO
)
2189 /* Also gobbles optional text. */
2190 if (gfc_match (" kind = ") == MATCH_YES
)
2193 loc
= gfc_current_locus
;
2196 n
= gfc_match_init_expr (&e
);
2200 if (gfc_matching_function
)
2202 /* The function kind expression might include use associated or
2203 imported parameters and try again after the specification
2205 if (gfc_match_char (')') != MATCH_YES
)
2207 gfc_error ("Missing right parenthesis at %C");
2213 gfc_undo_symbols ();
2218 /* ....or else, the match is real. */
2220 gfc_error ("Expected initialization expression at %C");
2228 gfc_error ("Expected scalar initialization expression at %C");
2233 msg
= gfc_extract_int (e
, &ts
->kind
);
2242 /* Before throwing away the expression, let's see if we had a
2243 C interoperable kind (and store the fact). */
2244 if (e
->ts
.is_c_interop
== 1)
2246 /* Mark this as C interoperable if being declared with one
2247 of the named constants from iso_c_binding. */
2248 ts
->is_c_interop
= e
->ts
.is_iso_c
;
2249 ts
->f90_type
= e
->ts
.f90_type
;
2255 /* Ignore errors to this point, if we've gotten here. This means
2256 we ignore the m=MATCH_ERROR from above. */
2257 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2259 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
2260 gfc_basic_typename (ts
->type
));
2261 gfc_current_locus
= where
;
2265 /* Warn if, e.g., c_int is used for a REAL variable, but not
2266 if, e.g., c_double is used for COMPLEX as the standard
2267 explicitly says that the kind type parameter for complex and real
2268 variable is the same, i.e. c_float == c_float_complex. */
2269 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2270 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2271 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2272 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2273 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2274 gfc_basic_typename (ts
->type
));
2276 gfc_gobble_whitespace ();
2277 if ((c
= gfc_next_ascii_char ()) != ')'
2278 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2280 if (ts
->type
== BT_CHARACTER
)
2281 gfc_error ("Missing right parenthesis or comma at %C");
2283 gfc_error ("Missing right parenthesis at %C");
2287 /* All tests passed. */
2290 if(m
== MATCH_ERROR
)
2291 gfc_current_locus
= where
;
2293 if (ts
->type
== BT_INTEGER
&& ts
->kind
== 4 && gfc_option
.flag_integer4_kind
== 8)
2296 if (ts
->type
== BT_REAL
|| ts
->type
== BT_COMPLEX
)
2300 if (gfc_option
.flag_real4_kind
== 8)
2302 if (gfc_option
.flag_real4_kind
== 10)
2304 if (gfc_option
.flag_real4_kind
== 16)
2310 if (gfc_option
.flag_real8_kind
== 4)
2312 if (gfc_option
.flag_real8_kind
== 10)
2314 if (gfc_option
.flag_real8_kind
== 16)
2319 /* Return what we know from the test(s). */
2324 gfc_current_locus
= where
;
2330 match_char_kind (int * kind
, int * is_iso_c
)
2339 where
= gfc_current_locus
;
2341 n
= gfc_match_init_expr (&e
);
2343 if (n
!= MATCH_YES
&& gfc_matching_function
)
2345 /* The expression might include use-associated or imported
2346 parameters and try again after the specification
2349 gfc_undo_symbols ();
2354 gfc_error ("Expected initialization expression at %C");
2360 gfc_error ("Expected scalar initialization expression at %C");
2365 msg
= gfc_extract_int (e
, kind
);
2366 *is_iso_c
= e
->ts
.is_iso_c
;
2376 /* Ignore errors to this point, if we've gotten here. This means
2377 we ignore the m=MATCH_ERROR from above. */
2378 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2380 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2384 /* All tests passed. */
2387 if (m
== MATCH_ERROR
)
2388 gfc_current_locus
= where
;
2390 /* Return what we know from the test(s). */
2395 gfc_current_locus
= where
;
2400 /* Match the various kind/length specifications in a CHARACTER
2401 declaration. We don't return MATCH_NO. */
2404 gfc_match_char_spec (gfc_typespec
*ts
)
2406 int kind
, seen_length
, is_iso_c
;
2418 /* Try the old-style specification first. */
2419 old_char_selector
= 0;
2421 m
= match_char_length (&len
, &deferred
, true);
2425 old_char_selector
= 1;
2430 m
= gfc_match_char ('(');
2433 m
= MATCH_YES
; /* Character without length is a single char. */
2437 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2438 if (gfc_match (" kind =") == MATCH_YES
)
2440 m
= match_char_kind (&kind
, &is_iso_c
);
2442 if (m
== MATCH_ERROR
)
2447 if (gfc_match (" , len =") == MATCH_NO
)
2450 m
= char_len_param_value (&len
, &deferred
);
2453 if (m
== MATCH_ERROR
)
2460 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2461 if (gfc_match (" len =") == MATCH_YES
)
2463 m
= char_len_param_value (&len
, &deferred
);
2466 if (m
== MATCH_ERROR
)
2470 if (gfc_match_char (')') == MATCH_YES
)
2473 if (gfc_match (" , kind =") != MATCH_YES
)
2476 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2482 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2483 m
= char_len_param_value (&len
, &deferred
);
2486 if (m
== MATCH_ERROR
)
2490 m
= gfc_match_char (')');
2494 if (gfc_match_char (',') != MATCH_YES
)
2497 gfc_match (" kind ="); /* Gobble optional text. */
2499 m
= match_char_kind (&kind
, &is_iso_c
);
2500 if (m
== MATCH_ERROR
)
2506 /* Require a right-paren at this point. */
2507 m
= gfc_match_char (')');
2512 gfc_error ("Syntax error in CHARACTER declaration at %C");
2514 gfc_free_expr (len
);
2518 /* Deal with character functions after USE and IMPORT statements. */
2519 if (gfc_matching_function
)
2521 gfc_free_expr (len
);
2522 gfc_undo_symbols ();
2528 gfc_free_expr (len
);
2532 /* Do some final massaging of the length values. */
2533 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2535 if (seen_length
== 0)
2536 cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
2541 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2542 ts
->deferred
= deferred
;
2544 /* We have to know if it was a C interoperable kind so we can
2545 do accurate type checking of bind(c) procs, etc. */
2547 /* Mark this as C interoperable if being declared with one
2548 of the named constants from iso_c_binding. */
2549 ts
->is_c_interop
= is_iso_c
;
2550 else if (len
!= NULL
)
2551 /* Here, we might have parsed something such as: character(c_char)
2552 In this case, the parsing code above grabs the c_char when
2553 looking for the length (line 1690, roughly). it's the last
2554 testcase for parsing the kind params of a character variable.
2555 However, it's not actually the length. this seems like it
2557 To see if the user used a C interop kind, test the expr
2558 of the so called length, and see if it's C interoperable. */
2559 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2565 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2566 structure to the matched specification. This is necessary for FUNCTION and
2567 IMPLICIT statements.
2569 If implicit_flag is nonzero, then we don't check for the optional
2570 kind specification. Not doing so is needed for matching an IMPLICIT
2571 statement correctly. */
2574 gfc_match_decl_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2576 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2577 gfc_symbol
*sym
, *dt_sym
;
2580 bool seen_deferred_kind
, matched_type
;
2581 const char *dt_name
;
2583 /* A belt and braces check that the typespec is correctly being treated
2584 as a deferred characteristic association. */
2585 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2586 && (gfc_current_block ()->result
->ts
.kind
== -1)
2587 && (ts
->kind
== -1);
2589 if (seen_deferred_kind
)
2592 /* Clear the current binding label, in case one is given. */
2593 curr_binding_label
= NULL
;
2595 if (gfc_match (" byte") == MATCH_YES
)
2597 if (!gfc_notify_std (GFC_STD_GNU
, "BYTE type at %C"))
2600 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2602 gfc_error ("BYTE type used at %C "
2603 "is not available on the target machine");
2607 ts
->type
= BT_INTEGER
;
2613 m
= gfc_match (" type (");
2614 matched_type
= (m
== MATCH_YES
);
2617 gfc_gobble_whitespace ();
2618 if (gfc_peek_ascii_char () == '*')
2620 if ((m
= gfc_match ("*)")) != MATCH_YES
)
2622 if (gfc_current_state () == COMP_DERIVED
)
2624 gfc_error ("Assumed type at %C is not allowed for components");
2627 if (!gfc_notify_std (GFC_STD_F2008_TS
, "Assumed type "
2630 ts
->type
= BT_ASSUMED
;
2634 m
= gfc_match ("%n", name
);
2635 matched_type
= (m
== MATCH_YES
);
2638 if ((matched_type
&& strcmp ("integer", name
) == 0)
2639 || (!matched_type
&& gfc_match (" integer") == MATCH_YES
))
2641 ts
->type
= BT_INTEGER
;
2642 ts
->kind
= gfc_default_integer_kind
;
2646 if ((matched_type
&& strcmp ("character", name
) == 0)
2647 || (!matched_type
&& gfc_match (" character") == MATCH_YES
))
2650 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2651 "intrinsic-type-spec at %C"))
2654 ts
->type
= BT_CHARACTER
;
2655 if (implicit_flag
== 0)
2656 m
= gfc_match_char_spec (ts
);
2660 if (matched_type
&& m
== MATCH_YES
&& gfc_match_char (')') != MATCH_YES
)
2666 if ((matched_type
&& strcmp ("real", name
) == 0)
2667 || (!matched_type
&& gfc_match (" real") == MATCH_YES
))
2670 ts
->kind
= gfc_default_real_kind
;
2675 && (strcmp ("doubleprecision", name
) == 0
2676 || (strcmp ("double", name
) == 0
2677 && gfc_match (" precision") == MATCH_YES
)))
2678 || (!matched_type
&& gfc_match (" double precision") == MATCH_YES
))
2681 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2682 "intrinsic-type-spec at %C"))
2684 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2688 ts
->kind
= gfc_default_double_kind
;
2692 if ((matched_type
&& strcmp ("complex", name
) == 0)
2693 || (!matched_type
&& gfc_match (" complex") == MATCH_YES
))
2695 ts
->type
= BT_COMPLEX
;
2696 ts
->kind
= gfc_default_complex_kind
;
2701 && (strcmp ("doublecomplex", name
) == 0
2702 || (strcmp ("double", name
) == 0
2703 && gfc_match (" complex") == MATCH_YES
)))
2704 || (!matched_type
&& gfc_match (" double complex") == MATCH_YES
))
2706 if (!gfc_notify_std (GFC_STD_GNU
, "DOUBLE COMPLEX at %C"))
2710 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2711 "intrinsic-type-spec at %C"))
2714 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2717 ts
->type
= BT_COMPLEX
;
2718 ts
->kind
= gfc_default_double_kind
;
2722 if ((matched_type
&& strcmp ("logical", name
) == 0)
2723 || (!matched_type
&& gfc_match (" logical") == MATCH_YES
))
2725 ts
->type
= BT_LOGICAL
;
2726 ts
->kind
= gfc_default_logical_kind
;
2731 m
= gfc_match_char (')');
2734 ts
->type
= BT_DERIVED
;
2737 /* Match CLASS declarations. */
2738 m
= gfc_match (" class ( * )");
2739 if (m
== MATCH_ERROR
)
2741 else if (m
== MATCH_YES
)
2745 ts
->type
= BT_CLASS
;
2746 gfc_find_symbol ("STAR", gfc_current_ns
, 1, &upe
);
2749 upe
= gfc_new_symbol ("STAR", gfc_current_ns
);
2750 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "STAR");
2752 gfc_set_sym_referenced (upe
);
2754 upe
->ts
.type
= BT_VOID
;
2755 upe
->attr
.unlimited_polymorphic
= 1;
2756 /* This is essential to force the construction of
2757 unlimited polymorphic component class containers. */
2758 upe
->attr
.zero_comp
= 1;
2759 if (!gfc_add_flavor (&upe
->attr
, FL_DERIVED
, NULL
,
2760 &gfc_current_locus
))
2765 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, "STAR");
2767 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "STAR");
2771 ts
->u
.derived
= upe
;
2775 m
= gfc_match (" class ( %n )", name
);
2778 ts
->type
= BT_CLASS
;
2780 if (!gfc_notify_std (GFC_STD_F2003
, "CLASS statement at %C"))
2784 /* Defer association of the derived type until the end of the
2785 specification block. However, if the derived type can be
2786 found, add it to the typespec. */
2787 if (gfc_matching_function
)
2789 ts
->u
.derived
= NULL
;
2790 if (gfc_current_state () != COMP_INTERFACE
2791 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2793 sym
= gfc_find_dt_in_generic (sym
);
2794 ts
->u
.derived
= sym
;
2799 /* Search for the name but allow the components to be defined later. If
2800 type = -1, this typespec has been seen in a function declaration but
2801 the type could not be accessed at that point. The actual derived type is
2802 stored in a symtree with the first letter of the name capitalized; the
2803 symtree with the all lower-case name contains the associated
2804 generic function. */
2805 dt_name
= gfc_get_string ("%c%s",
2806 (char) TOUPPER ((unsigned char) name
[0]),
2807 (const char*)&name
[1]);
2812 gfc_get_ha_symbol (name
, &sym
);
2813 if (sym
->generic
&& gfc_find_symbol (dt_name
, NULL
, 0, &dt_sym
))
2815 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2818 if (sym
->generic
&& !dt_sym
)
2819 dt_sym
= gfc_find_dt_in_generic (sym
);
2821 else if (ts
->kind
== -1)
2823 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2824 || gfc_current_ns
->has_import_set
;
2825 gfc_find_symbol (name
, NULL
, iface
, &sym
);
2826 if (sym
&& sym
->generic
&& gfc_find_symbol (dt_name
, NULL
, 1, &dt_sym
))
2828 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2831 if (sym
&& sym
->generic
&& !dt_sym
)
2832 dt_sym
= gfc_find_dt_in_generic (sym
);
2839 if ((sym
->attr
.flavor
!= FL_UNKNOWN
2840 && !(sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.generic
))
2841 || sym
->attr
.subroutine
)
2843 gfc_error ("Type name '%s' at %C conflicts with previously declared "
2844 "entity at %L, which has the same name", name
,
2849 gfc_set_sym_referenced (sym
);
2850 if (!sym
->attr
.generic
2851 && !gfc_add_generic (&sym
->attr
, sym
->name
, NULL
))
2854 if (!sym
->attr
.function
2855 && !gfc_add_function (&sym
->attr
, sym
->name
, NULL
))
2860 gfc_interface
*intr
, *head
;
2862 /* Use upper case to save the actual derived-type symbol. */
2863 gfc_get_symbol (dt_name
, NULL
, &dt_sym
);
2864 dt_sym
->name
= gfc_get_string (sym
->name
);
2865 head
= sym
->generic
;
2866 intr
= gfc_get_interface ();
2868 intr
->where
= gfc_current_locus
;
2870 sym
->generic
= intr
;
2871 sym
->attr
.if_source
= IFSRC_DECL
;
2874 gfc_set_sym_referenced (dt_sym
);
2876 if (dt_sym
->attr
.flavor
!= FL_DERIVED
2877 && !gfc_add_flavor (&dt_sym
->attr
, FL_DERIVED
, sym
->name
, NULL
))
2880 ts
->u
.derived
= dt_sym
;
2886 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2887 "intrinsic-type-spec at %C"))
2890 /* For all types except double, derived and character, look for an
2891 optional kind specifier. MATCH_NO is actually OK at this point. */
2892 if (implicit_flag
== 1)
2894 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2900 if (gfc_current_form
== FORM_FREE
)
2902 c
= gfc_peek_ascii_char ();
2903 if (!gfc_is_whitespace (c
) && c
!= '*' && c
!= '('
2904 && c
!= ':' && c
!= ',')
2906 if (matched_type
&& c
== ')')
2908 gfc_next_ascii_char ();
2915 m
= gfc_match_kind_spec (ts
, false);
2916 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2917 m
= gfc_match_old_kind_spec (ts
);
2919 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2922 /* Defer association of the KIND expression of function results
2923 until after USE and IMPORT statements. */
2924 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2925 || gfc_matching_function
)
2929 m
= MATCH_YES
; /* No kind specifier found. */
2935 /* Match an IMPLICIT NONE statement. Actually, this statement is
2936 already matched in parse.c, or we would not end up here in the
2937 first place. So the only thing we need to check, is if there is
2938 trailing garbage. If not, the match is successful. */
2941 gfc_match_implicit_none (void)
2943 return (gfc_match_eos () == MATCH_YES
) ? MATCH_YES
: MATCH_NO
;
2947 /* Match the letter range(s) of an IMPLICIT statement. */
2950 match_implicit_range (void)
2956 cur_loc
= gfc_current_locus
;
2958 gfc_gobble_whitespace ();
2959 c
= gfc_next_ascii_char ();
2962 gfc_error ("Missing character range in IMPLICIT at %C");
2969 gfc_gobble_whitespace ();
2970 c1
= gfc_next_ascii_char ();
2974 gfc_gobble_whitespace ();
2975 c
= gfc_next_ascii_char ();
2980 inner
= 0; /* Fall through. */
2987 gfc_gobble_whitespace ();
2988 c2
= gfc_next_ascii_char ();
2992 gfc_gobble_whitespace ();
2993 c
= gfc_next_ascii_char ();
2995 if ((c
!= ',') && (c
!= ')'))
3008 gfc_error ("Letters must be in alphabetic order in "
3009 "IMPLICIT statement at %C");
3013 /* See if we can add the newly matched range to the pending
3014 implicits from this IMPLICIT statement. We do not check for
3015 conflicts with whatever earlier IMPLICIT statements may have
3016 set. This is done when we've successfully finished matching
3018 if (!gfc_add_new_implicit_range (c1
, c2
))
3025 gfc_syntax_error (ST_IMPLICIT
);
3027 gfc_current_locus
= cur_loc
;
3032 /* Match an IMPLICIT statement, storing the types for
3033 gfc_set_implicit() if the statement is accepted by the parser.
3034 There is a strange looking, but legal syntactic construction
3035 possible. It looks like:
3037 IMPLICIT INTEGER (a-b) (c-d)
3039 This is legal if "a-b" is a constant expression that happens to
3040 equal one of the legal kinds for integers. The real problem
3041 happens with an implicit specification that looks like:
3043 IMPLICIT INTEGER (a-b)
3045 In this case, a typespec matcher that is "greedy" (as most of the
3046 matchers are) gobbles the character range as a kindspec, leaving
3047 nothing left. We therefore have to go a bit more slowly in the
3048 matching process by inhibiting the kindspec checking during
3049 typespec matching and checking for a kind later. */
3052 gfc_match_implicit (void)
3061 /* We don't allow empty implicit statements. */
3062 if (gfc_match_eos () == MATCH_YES
)
3064 gfc_error ("Empty IMPLICIT statement at %C");
3070 /* First cleanup. */
3071 gfc_clear_new_implicit ();
3073 /* A basic type is mandatory here. */
3074 m
= gfc_match_decl_type_spec (&ts
, 1);
3075 if (m
== MATCH_ERROR
)
3080 cur_loc
= gfc_current_locus
;
3081 m
= match_implicit_range ();
3085 /* We may have <TYPE> (<RANGE>). */
3086 gfc_gobble_whitespace ();
3087 c
= gfc_next_ascii_char ();
3088 if ((c
== '\n') || (c
== ','))
3090 /* Check for CHARACTER with no length parameter. */
3091 if (ts
.type
== BT_CHARACTER
&& !ts
.u
.cl
)
3093 ts
.kind
= gfc_default_character_kind
;
3094 ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
3095 ts
.u
.cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
,
3099 /* Record the Successful match. */
3100 if (!gfc_merge_new_implicit (&ts
))
3105 gfc_current_locus
= cur_loc
;
3108 /* Discard the (incorrectly) matched range. */
3109 gfc_clear_new_implicit ();
3111 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
3112 if (ts
.type
== BT_CHARACTER
)
3113 m
= gfc_match_char_spec (&ts
);
3116 m
= gfc_match_kind_spec (&ts
, false);
3119 m
= gfc_match_old_kind_spec (&ts
);
3120 if (m
== MATCH_ERROR
)
3126 if (m
== MATCH_ERROR
)
3129 m
= match_implicit_range ();
3130 if (m
== MATCH_ERROR
)
3135 gfc_gobble_whitespace ();
3136 c
= gfc_next_ascii_char ();
3137 if ((c
!= '\n') && (c
!= ','))
3140 if (!gfc_merge_new_implicit (&ts
))
3148 gfc_syntax_error (ST_IMPLICIT
);
3156 gfc_match_import (void)
3158 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3163 if (gfc_current_ns
->proc_name
== NULL
3164 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
3166 gfc_error ("IMPORT statement at %C only permitted in "
3167 "an INTERFACE body");
3171 if (!gfc_notify_std (GFC_STD_F2003
, "IMPORT statement at %C"))
3174 if (gfc_match_eos () == MATCH_YES
)
3176 /* All host variables should be imported. */
3177 gfc_current_ns
->has_import_set
= 1;
3181 if (gfc_match (" ::") == MATCH_YES
)
3183 if (gfc_match_eos () == MATCH_YES
)
3185 gfc_error ("Expecting list of named entities at %C");
3193 m
= gfc_match (" %n", name
);
3197 if (gfc_current_ns
->parent
!= NULL
3198 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
3200 gfc_error ("Type name '%s' at %C is ambiguous", name
);
3203 else if (!sym
&& gfc_current_ns
->proc_name
->ns
->parent
!= NULL
3204 && gfc_find_symbol (name
,
3205 gfc_current_ns
->proc_name
->ns
->parent
,
3208 gfc_error ("Type name '%s' at %C is ambiguous", name
);
3214 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
3215 "at %C - does not exist.", name
);
3219 if (gfc_find_symtree (gfc_current_ns
->sym_root
, name
))
3221 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
3226 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
3229 sym
->attr
.imported
= 1;
3231 if (sym
->attr
.generic
&& (sym
= gfc_find_dt_in_generic (sym
)))
3233 /* The actual derived type is stored in a symtree with the first
3234 letter of the name capitalized; the symtree with the all
3235 lower-case name contains the associated generic function. */
3236 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
,
3237 gfc_get_string ("%c%s",
3238 (char) TOUPPER ((unsigned char) name
[0]),
3242 sym
->attr
.imported
= 1;
3255 if (gfc_match_eos () == MATCH_YES
)
3257 if (gfc_match_char (',') != MATCH_YES
)
3264 gfc_error ("Syntax error in IMPORT statement at %C");
3269 /* A minimal implementation of gfc_match without whitespace, escape
3270 characters or variable arguments. Returns true if the next
3271 characters match the TARGET template exactly. */
3274 match_string_p (const char *target
)
3278 for (p
= target
; *p
; p
++)
3279 if ((char) gfc_next_ascii_char () != *p
)
3284 /* Matches an attribute specification including array specs. If
3285 successful, leaves the variables current_attr and current_as
3286 holding the specification. Also sets the colon_seen variable for
3287 later use by matchers associated with initializations.
3289 This subroutine is a little tricky in the sense that we don't know
3290 if we really have an attr-spec until we hit the double colon.
3291 Until that time, we can only return MATCH_NO. This forces us to
3292 check for duplicate specification at this level. */
3295 match_attr_spec (void)
3297 /* Modifiers that can exist in a type statement. */
3299 { GFC_DECL_BEGIN
= 0,
3300 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
3301 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
3302 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
3303 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
3304 DECL_IS_BIND_C
, DECL_CODIMENSION
, DECL_ASYNCHRONOUS
, DECL_CONTIGUOUS
,
3305 DECL_NONE
, GFC_DECL_END
/* Sentinel */
3308 /* GFC_DECL_END is the sentinel, index starts at 0. */
3309 #define NUM_DECL GFC_DECL_END
3311 locus start
, seen_at
[NUM_DECL
];
3318 gfc_clear_attr (¤t_attr
);
3319 start
= gfc_current_locus
;
3324 /* See if we get all of the keywords up to the final double colon. */
3325 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3333 gfc_gobble_whitespace ();
3335 ch
= gfc_next_ascii_char ();
3338 /* This is the successful exit condition for the loop. */
3339 if (gfc_next_ascii_char () == ':')
3344 gfc_gobble_whitespace ();
3345 switch (gfc_peek_ascii_char ())
3348 gfc_next_ascii_char ();
3349 switch (gfc_next_ascii_char ())
3352 if (match_string_p ("locatable"))
3354 /* Matched "allocatable". */
3355 d
= DECL_ALLOCATABLE
;
3360 if (match_string_p ("ynchronous"))
3362 /* Matched "asynchronous". */
3363 d
= DECL_ASYNCHRONOUS
;
3370 /* Try and match the bind(c). */
3371 m
= gfc_match_bind_c (NULL
, true);
3374 else if (m
== MATCH_ERROR
)
3379 gfc_next_ascii_char ();
3380 if ('o' != gfc_next_ascii_char ())
3382 switch (gfc_next_ascii_char ())
3385 if (match_string_p ("imension"))
3387 d
= DECL_CODIMENSION
;
3391 if (match_string_p ("tiguous"))
3393 d
= DECL_CONTIGUOUS
;
3400 if (match_string_p ("dimension"))
3405 if (match_string_p ("external"))
3410 if (match_string_p ("int"))
3412 ch
= gfc_next_ascii_char ();
3415 if (match_string_p ("nt"))
3417 /* Matched "intent". */
3418 /* TODO: Call match_intent_spec from here. */
3419 if (gfc_match (" ( in out )") == MATCH_YES
)
3421 else if (gfc_match (" ( in )") == MATCH_YES
)
3423 else if (gfc_match (" ( out )") == MATCH_YES
)
3429 if (match_string_p ("insic"))
3431 /* Matched "intrinsic". */
3439 if (match_string_p ("optional"))
3444 gfc_next_ascii_char ();
3445 switch (gfc_next_ascii_char ())
3448 if (match_string_p ("rameter"))
3450 /* Matched "parameter". */
3456 if (match_string_p ("inter"))
3458 /* Matched "pointer". */
3464 ch
= gfc_next_ascii_char ();
3467 if (match_string_p ("vate"))
3469 /* Matched "private". */
3475 if (match_string_p ("tected"))
3477 /* Matched "protected". */
3484 if (match_string_p ("blic"))
3486 /* Matched "public". */
3494 if (match_string_p ("save"))
3499 if (match_string_p ("target"))
3504 gfc_next_ascii_char ();
3505 ch
= gfc_next_ascii_char ();
3508 if (match_string_p ("lue"))
3510 /* Matched "value". */
3516 if (match_string_p ("latile"))
3518 /* Matched "volatile". */
3526 /* No double colon and no recognizable decl_type, so assume that
3527 we've been looking at something else the whole time. */
3534 /* Check to make sure any parens are paired up correctly. */
3535 if (gfc_match_parens () == MATCH_ERROR
)
3542 seen_at
[d
] = gfc_current_locus
;
3544 if (d
== DECL_DIMENSION
|| d
== DECL_CODIMENSION
)
3546 gfc_array_spec
*as
= NULL
;
3548 m
= gfc_match_array_spec (&as
, d
== DECL_DIMENSION
,
3549 d
== DECL_CODIMENSION
);
3551 if (current_as
== NULL
)
3553 else if (m
== MATCH_YES
)
3555 if (!merge_array_spec (as
, current_as
, false))
3562 if (d
== DECL_CODIMENSION
)
3563 gfc_error ("Missing codimension specification at %C");
3565 gfc_error ("Missing dimension specification at %C");
3569 if (m
== MATCH_ERROR
)
3574 /* Since we've seen a double colon, we have to be looking at an
3575 attr-spec. This means that we can now issue errors. */
3576 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3581 case DECL_ALLOCATABLE
:
3582 attr
= "ALLOCATABLE";
3584 case DECL_ASYNCHRONOUS
:
3585 attr
= "ASYNCHRONOUS";
3587 case DECL_CODIMENSION
:
3588 attr
= "CODIMENSION";
3590 case DECL_CONTIGUOUS
:
3591 attr
= "CONTIGUOUS";
3593 case DECL_DIMENSION
:
3600 attr
= "INTENT (IN)";
3603 attr
= "INTENT (OUT)";
3606 attr
= "INTENT (IN OUT)";
3608 case DECL_INTRINSIC
:
3614 case DECL_PARAMETER
:
3620 case DECL_PROTECTED
:
3635 case DECL_IS_BIND_C
:
3645 attr
= NULL
; /* This shouldn't happen. */
3648 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3653 /* Now that we've dealt with duplicate attributes, add the attributes
3654 to the current attribute. */
3655 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3660 if (gfc_current_state () == COMP_DERIVED
3661 && d
!= DECL_DIMENSION
&& d
!= DECL_CODIMENSION
3662 && d
!= DECL_POINTER
&& d
!= DECL_PRIVATE
3663 && d
!= DECL_PUBLIC
&& d
!= DECL_CONTIGUOUS
&& d
!= DECL_NONE
)
3665 if (d
== DECL_ALLOCATABLE
)
3667 if (!gfc_notify_std (GFC_STD_F2003
, "ALLOCATABLE "
3668 "attribute at %C in a TYPE definition"))
3676 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3683 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3684 && gfc_current_state () != COMP_MODULE
)
3686 if (d
== DECL_PRIVATE
)
3690 if (gfc_current_state () == COMP_DERIVED
3691 && gfc_state_stack
->previous
3692 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3694 if (!gfc_notify_std (GFC_STD_F2003
, "Attribute %s "
3695 "at %L in a TYPE definition", attr
,
3704 gfc_error ("%s attribute at %L is not allowed outside of the "
3705 "specification part of a module", attr
, &seen_at
[d
]);
3713 case DECL_ALLOCATABLE
:
3714 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3717 case DECL_ASYNCHRONOUS
:
3718 if (!gfc_notify_std (GFC_STD_F2003
, "ASYNCHRONOUS attribute at %C"))
3721 t
= gfc_add_asynchronous (¤t_attr
, NULL
, &seen_at
[d
]);
3724 case DECL_CODIMENSION
:
3725 t
= gfc_add_codimension (¤t_attr
, NULL
, &seen_at
[d
]);
3728 case DECL_CONTIGUOUS
:
3729 if (!gfc_notify_std (GFC_STD_F2008
, "CONTIGUOUS attribute at %C"))
3732 t
= gfc_add_contiguous (¤t_attr
, NULL
, &seen_at
[d
]);
3735 case DECL_DIMENSION
:
3736 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3740 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3744 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3748 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3752 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3755 case DECL_INTRINSIC
:
3756 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3760 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3763 case DECL_PARAMETER
:
3764 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3768 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3771 case DECL_PROTECTED
:
3772 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3774 gfc_error ("PROTECTED at %C only allowed in specification "
3775 "part of a module");
3780 if (!gfc_notify_std (GFC_STD_F2003
, "PROTECTED attribute at %C"))
3783 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3787 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3792 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3797 t
= gfc_add_save (¤t_attr
, SAVE_EXPLICIT
, NULL
, &seen_at
[d
]);
3801 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3804 case DECL_IS_BIND_C
:
3805 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3809 if (!gfc_notify_std (GFC_STD_F2003
, "VALUE attribute at %C"))
3812 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3816 if (!gfc_notify_std (GFC_STD_F2003
, "VOLATILE attribute at %C"))
3819 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3823 gfc_internal_error ("match_attr_spec(): Bad attribute");
3833 /* Since Fortran 2008 module variables implicitly have the SAVE attribute. */
3834 if (gfc_current_state () == COMP_MODULE
&& !current_attr
.save
3835 && (gfc_option
.allow_std
& GFC_STD_F2008
) != 0)
3836 current_attr
.save
= SAVE_IMPLICIT
;
3842 gfc_current_locus
= start
;
3843 gfc_free_array_spec (current_as
);
3849 /* Set the binding label, dest_label, either with the binding label
3850 stored in the given gfc_typespec, ts, or if none was provided, it
3851 will be the symbol name in all lower case, as required by the draft
3852 (J3/04-007, section 15.4.1). If a binding label was given and
3853 there is more than one argument (num_idents), it is an error. */
3856 set_binding_label (const char **dest_label
, const char *sym_name
,
3859 if (num_idents
> 1 && has_name_equals
)
3861 gfc_error ("Multiple identifiers provided with "
3862 "single NAME= specifier at %C");
3866 if (curr_binding_label
)
3867 /* Binding label given; store in temp holder till have sym. */
3868 *dest_label
= curr_binding_label
;
3871 /* No binding label given, and the NAME= specifier did not exist,
3872 which means there was no NAME="". */
3873 if (sym_name
!= NULL
&& has_name_equals
== 0)
3874 *dest_label
= IDENTIFIER_POINTER (get_identifier (sym_name
));
3881 /* Set the status of the given common block as being BIND(C) or not,
3882 depending on the given parameter, is_bind_c. */
3885 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3887 com_block
->is_bind_c
= is_bind_c
;
3892 /* Verify that the given gfc_typespec is for a C interoperable type. */
3895 gfc_verify_c_interop (gfc_typespec
*ts
)
3897 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
!= NULL
)
3898 return (ts
->u
.derived
->ts
.is_c_interop
|| ts
->u
.derived
->attr
.is_bind_c
)
3900 else if (ts
->type
== BT_CLASS
)
3902 else if (ts
->is_c_interop
!= 1 && ts
->type
!= BT_ASSUMED
)
3909 /* Verify that the variables of a given common block, which has been
3910 defined with the attribute specifier bind(c), to be of a C
3911 interoperable type. Errors will be reported here, if
3915 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3917 gfc_symbol
*curr_sym
= NULL
;
3920 curr_sym
= com_block
->head
;
3922 /* Make sure we have at least one symbol. */
3923 if (curr_sym
== NULL
)
3926 /* Here we know we have a symbol, so we'll execute this loop
3930 /* The second to last param, 1, says this is in a common block. */
3931 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
3932 curr_sym
= curr_sym
->common_next
;
3933 } while (curr_sym
!= NULL
);
3939 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3940 an appropriate error message is reported. */
3943 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
3944 int is_in_common
, gfc_common_head
*com_block
)
3946 bool bind_c_function
= false;
3949 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
3950 bind_c_function
= true;
3952 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
3954 tmp_sym
= tmp_sym
->result
;
3955 /* Make sure it wasn't an implicitly typed result. */
3956 if (tmp_sym
->attr
.implicit_type
&& gfc_option
.warn_c_binding_type
)
3958 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3959 "%L may not be C interoperable", tmp_sym
->name
,
3960 &tmp_sym
->declared_at
);
3961 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
3962 /* Mark it as C interoperable to prevent duplicate warnings. */
3963 tmp_sym
->ts
.is_c_interop
= 1;
3964 tmp_sym
->attr
.is_c_interop
= 1;
3968 /* Here, we know we have the bind(c) attribute, so if we have
3969 enough type info, then verify that it's a C interop kind.
3970 The info could be in the symbol already, or possibly still in
3971 the given ts (current_ts), so look in both. */
3972 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
3974 if (!gfc_verify_c_interop (&(tmp_sym
->ts
)))
3976 /* See if we're dealing with a sym in a common block or not. */
3977 if (is_in_common
== 1 && gfc_option
.warn_c_binding_type
)
3979 gfc_warning ("Variable '%s' in common block '%s' at %L "
3980 "may not be a C interoperable "
3981 "kind though common block '%s' is BIND(C)",
3982 tmp_sym
->name
, com_block
->name
,
3983 &(tmp_sym
->declared_at
), com_block
->name
);
3987 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
3988 gfc_error ("Type declaration '%s' at %L is not C "
3989 "interoperable but it is BIND(C)",
3990 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3991 else if (gfc_option
.warn_c_binding_type
)
3992 gfc_warning ("Variable '%s' at %L "
3993 "may not be a C interoperable "
3994 "kind but it is bind(c)",
3995 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3999 /* Variables declared w/in a common block can't be bind(c)
4000 since there's no way for C to see these variables, so there's
4001 semantically no reason for the attribute. */
4002 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
4004 gfc_error ("Variable '%s' in common block '%s' at "
4005 "%L cannot be declared with BIND(C) "
4006 "since it is not a global",
4007 tmp_sym
->name
, com_block
->name
,
4008 &(tmp_sym
->declared_at
));
4012 /* Scalar variables that are bind(c) can not have the pointer
4013 or allocatable attributes. */
4014 if (tmp_sym
->attr
.is_bind_c
== 1)
4016 if (tmp_sym
->attr
.pointer
== 1)
4018 gfc_error ("Variable '%s' at %L cannot have both the "
4019 "POINTER and BIND(C) attributes",
4020 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4024 if (tmp_sym
->attr
.allocatable
== 1)
4026 gfc_error ("Variable '%s' at %L cannot have both the "
4027 "ALLOCATABLE and BIND(C) attributes",
4028 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4034 /* If it is a BIND(C) function, make sure the return value is a
4035 scalar value. The previous tests in this function made sure
4036 the type is interoperable. */
4037 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
4038 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
4039 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
4041 /* BIND(C) functions can not return a character string. */
4042 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
4043 if (tmp_sym
->ts
.u
.cl
== NULL
|| tmp_sym
->ts
.u
.cl
->length
== NULL
4044 || tmp_sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
4045 || mpz_cmp_si (tmp_sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
4046 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
4047 "be a character string", tmp_sym
->name
,
4048 &(tmp_sym
->declared_at
));
4051 /* See if the symbol has been marked as private. If it has, make sure
4052 there is no binding label and warn the user if there is one. */
4053 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
4054 && tmp_sym
->binding_label
)
4055 /* Use gfc_warning_now because we won't say that the symbol fails
4056 just because of this. */
4057 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
4058 "given the binding label '%s'", tmp_sym
->name
,
4059 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
4065 /* Set the appropriate fields for a symbol that's been declared as
4066 BIND(C) (the is_bind_c flag and the binding label), and verify that
4067 the type is C interoperable. Errors are reported by the functions
4068 used to set/test these fields. */
4071 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
4075 /* TODO: Do we need to make sure the vars aren't marked private? */
4077 /* Set the is_bind_c bit in symbol_attribute. */
4078 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
4080 if (!set_binding_label (&tmp_sym
->binding_label
, tmp_sym
->name
, num_idents
))
4087 /* Set the fields marking the given common block as BIND(C), including
4088 a binding label, and report any errors encountered. */
4091 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
4095 /* destLabel, common name, typespec (which may have binding label). */
4096 if (!set_binding_label (&com_block
->binding_label
, com_block
->name
,
4100 /* Set the given common block (com_block) to being bind(c) (1). */
4101 set_com_block_bind_c (com_block
, 1);
4107 /* Retrieve the list of one or more identifiers that the given bind(c)
4108 attribute applies to. */
4111 get_bind_c_idents (void)
4113 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4115 gfc_symbol
*tmp_sym
= NULL
;
4117 gfc_common_head
*com_block
= NULL
;
4119 if (gfc_match_name (name
) == MATCH_YES
)
4121 found_id
= MATCH_YES
;
4122 gfc_get_ha_symbol (name
, &tmp_sym
);
4124 else if (match_common_name (name
) == MATCH_YES
)
4126 found_id
= MATCH_YES
;
4127 com_block
= gfc_get_common (name
, 0);
4131 gfc_error ("Need either entity or common block name for "
4132 "attribute specification statement at %C");
4136 /* Save the current identifier and look for more. */
4139 /* Increment the number of identifiers found for this spec stmt. */
4142 /* Make sure we have a sym or com block, and verify that it can
4143 be bind(c). Set the appropriate field(s) and look for more
4145 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
4147 if (tmp_sym
!= NULL
)
4149 if (!set_verify_bind_c_sym (tmp_sym
, num_idents
))
4154 if (!set_verify_bind_c_com_block (com_block
, num_idents
))
4158 /* Look to see if we have another identifier. */
4160 if (gfc_match_eos () == MATCH_YES
)
4161 found_id
= MATCH_NO
;
4162 else if (gfc_match_char (',') != MATCH_YES
)
4163 found_id
= MATCH_NO
;
4164 else if (gfc_match_name (name
) == MATCH_YES
)
4166 found_id
= MATCH_YES
;
4167 gfc_get_ha_symbol (name
, &tmp_sym
);
4169 else if (match_common_name (name
) == MATCH_YES
)
4171 found_id
= MATCH_YES
;
4172 com_block
= gfc_get_common (name
, 0);
4176 gfc_error ("Missing entity or common block name for "
4177 "attribute specification statement at %C");
4183 gfc_internal_error ("Missing symbol");
4185 } while (found_id
== MATCH_YES
);
4187 /* if we get here we were successful */
4192 /* Try and match a BIND(C) attribute specification statement. */
4195 gfc_match_bind_c_stmt (void)
4197 match found_match
= MATCH_NO
;
4202 /* This may not be necessary. */
4204 /* Clear the temporary binding label holder. */
4205 curr_binding_label
= NULL
;
4207 /* Look for the bind(c). */
4208 found_match
= gfc_match_bind_c (NULL
, true);
4210 if (found_match
== MATCH_YES
)
4212 if (!gfc_notify_std (GFC_STD_F2003
, "BIND(C) statement at %C"))
4215 /* Look for the :: now, but it is not required. */
4218 /* Get the identifier(s) that needs to be updated. This may need to
4219 change to hand the flag(s) for the attr specified so all identifiers
4220 found can have all appropriate parts updated (assuming that the same
4221 spec stmt can have multiple attrs, such as both bind(c) and
4223 if (!get_bind_c_idents ())
4224 /* Error message should have printed already. */
4232 /* Match a data declaration statement. */
4235 gfc_match_data_decl (void)
4241 num_idents_on_line
= 0;
4243 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4247 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4248 && gfc_current_state () != COMP_DERIVED
)
4250 sym
= gfc_use_derived (current_ts
.u
.derived
);
4258 current_ts
.u
.derived
= sym
;
4261 m
= match_attr_spec ();
4262 if (m
== MATCH_ERROR
)
4268 if (current_ts
.type
== BT_CLASS
4269 && current_ts
.u
.derived
->attr
.unlimited_polymorphic
)
4272 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4273 && current_ts
.u
.derived
->components
== NULL
4274 && !current_ts
.u
.derived
->attr
.zero_comp
)
4277 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
4280 gfc_find_symbol (current_ts
.u
.derived
->name
,
4281 current_ts
.u
.derived
->ns
, 1, &sym
);
4283 /* Any symbol that we find had better be a type definition
4284 which has its components defined. */
4285 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
4286 && (current_ts
.u
.derived
->components
!= NULL
4287 || current_ts
.u
.derived
->attr
.zero_comp
))
4290 /* Now we have an error, which we signal, and then fix up
4291 because the knock-on is plain and simple confusing. */
4292 gfc_error_now ("Derived type at %C has not been previously defined "
4293 "and so cannot appear in a derived type definition");
4294 current_attr
.pointer
= 1;
4299 /* If we have an old-style character declaration, and no new-style
4300 attribute specifications, then there a comma is optional between
4301 the type specification and the variable list. */
4302 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
4303 gfc_match_char (',');
4305 /* Give the types/attributes to symbols that follow. Give the element
4306 a number so that repeat character length expressions can be copied. */
4310 num_idents_on_line
++;
4311 m
= variable_decl (elem
++);
4312 if (m
== MATCH_ERROR
)
4317 if (gfc_match_eos () == MATCH_YES
)
4319 if (gfc_match_char (',') != MATCH_YES
)
4323 if (gfc_error_flag_test () == 0)
4324 gfc_error ("Syntax error in data declaration at %C");
4327 gfc_free_data_all (gfc_current_ns
);
4330 gfc_free_array_spec (current_as
);
4336 /* Match a prefix associated with a function or subroutine
4337 declaration. If the typespec pointer is nonnull, then a typespec
4338 can be matched. Note that if nothing matches, MATCH_YES is
4339 returned (the null string was matched). */
4342 gfc_match_prefix (gfc_typespec
*ts
)
4348 gfc_clear_attr (¤t_attr
);
4350 seen_impure
= false;
4352 gcc_assert (!gfc_matching_prefix
);
4353 gfc_matching_prefix
= true;
4357 found_prefix
= false;
4359 if (!seen_type
&& ts
!= NULL
4360 && gfc_match_decl_type_spec (ts
, 0) == MATCH_YES
4361 && gfc_match_space () == MATCH_YES
)
4365 found_prefix
= true;
4368 if (gfc_match ("elemental% ") == MATCH_YES
)
4370 if (!gfc_add_elemental (¤t_attr
, NULL
))
4373 found_prefix
= true;
4376 if (gfc_match ("pure% ") == MATCH_YES
)
4378 if (!gfc_add_pure (¤t_attr
, NULL
))
4381 found_prefix
= true;
4384 if (gfc_match ("recursive% ") == MATCH_YES
)
4386 if (!gfc_add_recursive (¤t_attr
, NULL
))
4389 found_prefix
= true;
4392 /* IMPURE is a somewhat special case, as it needs not set an actual
4393 attribute but rather only prevents ELEMENTAL routines from being
4394 automatically PURE. */
4395 if (gfc_match ("impure% ") == MATCH_YES
)
4397 if (!gfc_notify_std (GFC_STD_F2008
, "IMPURE procedure at %C"))
4401 found_prefix
= true;
4404 while (found_prefix
);
4406 /* IMPURE and PURE must not both appear, of course. */
4407 if (seen_impure
&& current_attr
.pure
)
4409 gfc_error ("PURE and IMPURE must not appear both at %C");
4413 /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */
4414 if (!seen_impure
&& current_attr
.elemental
&& !current_attr
.pure
)
4416 if (!gfc_add_pure (¤t_attr
, NULL
))
4420 /* At this point, the next item is not a prefix. */
4421 gcc_assert (gfc_matching_prefix
);
4422 gfc_matching_prefix
= false;
4426 gcc_assert (gfc_matching_prefix
);
4427 gfc_matching_prefix
= false;
4432 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
4435 copy_prefix (symbol_attribute
*dest
, locus
*where
)
4437 if (current_attr
.pure
&& !gfc_add_pure (dest
, where
))
4440 if (current_attr
.elemental
&& !gfc_add_elemental (dest
, where
))
4443 if (current_attr
.recursive
&& !gfc_add_recursive (dest
, where
))
4450 /* Match a formal argument list. */
4453 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
4455 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
4456 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4462 if (gfc_match_char ('(') != MATCH_YES
)
4469 if (gfc_match_char (')') == MATCH_YES
)
4474 if (gfc_match_char ('*') == MATCH_YES
)
4477 if (!gfc_notify_std (GFC_STD_F95_OBS
, "Alternate-return argument "
4486 m
= gfc_match_name (name
);
4490 if (gfc_get_symbol (name
, NULL
, &sym
))
4494 p
= gfc_get_formal_arglist ();
4506 /* We don't add the VARIABLE flavor because the name could be a
4507 dummy procedure. We don't apply these attributes to formal
4508 arguments of statement functions. */
4509 if (sym
!= NULL
&& !st_flag
4510 && (!gfc_add_dummy(&sym
->attr
, sym
->name
, NULL
)
4511 || !gfc_missing_attr (&sym
->attr
, NULL
)))
4517 /* The name of a program unit can be in a different namespace,
4518 so check for it explicitly. After the statement is accepted,
4519 the name is checked for especially in gfc_get_symbol(). */
4520 if (gfc_new_block
!= NULL
&& sym
!= NULL
4521 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
4523 gfc_error ("Name '%s' at %C is the name of the procedure",
4529 if (gfc_match_char (')') == MATCH_YES
)
4532 m
= gfc_match_char (',');
4535 gfc_error ("Unexpected junk in formal argument list at %C");
4541 /* Check for duplicate symbols in the formal argument list. */
4544 for (p
= head
; p
->next
; p
= p
->next
)
4549 for (q
= p
->next
; q
; q
= q
->next
)
4550 if (p
->sym
== q
->sym
)
4552 gfc_error ("Duplicate symbol '%s' in formal argument list "
4553 "at %C", p
->sym
->name
);
4561 if (!gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
))
4570 gfc_free_formal_arglist (head
);
4575 /* Match a RESULT specification following a function declaration or
4576 ENTRY statement. Also matches the end-of-statement. */
4579 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
4581 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4585 if (gfc_match (" result (") != MATCH_YES
)
4588 m
= gfc_match_name (name
);
4592 /* Get the right paren, and that's it because there could be the
4593 bind(c) attribute after the result clause. */
4594 if (gfc_match_char (')') != MATCH_YES
)
4596 /* TODO: should report the missing right paren here. */
4600 if (strcmp (function
->name
, name
) == 0)
4602 gfc_error ("RESULT variable at %C must be different than function name");
4606 if (gfc_get_symbol (name
, NULL
, &r
))
4609 if (!gfc_add_result (&r
->attr
, r
->name
, NULL
))
4618 /* Match a function suffix, which could be a combination of a result
4619 clause and BIND(C), either one, or neither. The draft does not
4620 require them to come in a specific order. */
4623 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4625 match is_bind_c
; /* Found bind(c). */
4626 match is_result
; /* Found result clause. */
4627 match found_match
; /* Status of whether we've found a good match. */
4628 char peek_char
; /* Character we're going to peek at. */
4629 bool allow_binding_name
;
4631 /* Initialize to having found nothing. */
4632 found_match
= MATCH_NO
;
4633 is_bind_c
= MATCH_NO
;
4634 is_result
= MATCH_NO
;
4636 /* Get the next char to narrow between result and bind(c). */
4637 gfc_gobble_whitespace ();
4638 peek_char
= gfc_peek_ascii_char ();
4640 /* C binding names are not allowed for internal procedures. */
4641 if (gfc_current_state () == COMP_CONTAINS
4642 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4643 allow_binding_name
= false;
4645 allow_binding_name
= true;
4650 /* Look for result clause. */
4651 is_result
= match_result (sym
, result
);
4652 if (is_result
== MATCH_YES
)
4654 /* Now see if there is a bind(c) after it. */
4655 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4656 /* We've found the result clause and possibly bind(c). */
4657 found_match
= MATCH_YES
;
4660 /* This should only be MATCH_ERROR. */
4661 found_match
= is_result
;
4664 /* Look for bind(c) first. */
4665 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4666 if (is_bind_c
== MATCH_YES
)
4668 /* Now see if a result clause followed it. */
4669 is_result
= match_result (sym
, result
);
4670 found_match
= MATCH_YES
;
4674 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4675 found_match
= MATCH_ERROR
;
4679 gfc_error ("Unexpected junk after function declaration at %C");
4680 found_match
= MATCH_ERROR
;
4684 if (is_bind_c
== MATCH_YES
)
4686 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4687 if (gfc_current_state () == COMP_CONTAINS
4688 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4689 && !gfc_notify_std (GFC_STD_F2008
, "BIND(C) attribute "
4690 "at %L may not be specified for an internal "
4691 "procedure", &gfc_current_locus
))
4694 if (!gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1))
4702 /* Procedure pointer return value without RESULT statement:
4703 Add "hidden" result variable named "ppr@". */
4706 add_hidden_procptr_result (gfc_symbol
*sym
)
4710 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4713 /* First usage case: PROCEDURE and EXTERNAL statements. */
4714 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4715 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4716 && sym
->attr
.external
;
4717 /* Second usage case: INTERFACE statements. */
4718 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4719 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4720 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4726 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4730 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4731 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4732 st2
->n
.sym
= stree
->n
.sym
;
4734 sym
->result
= stree
->n
.sym
;
4736 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4737 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4738 sym
->result
->attr
.external
= sym
->attr
.external
;
4739 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4740 sym
->result
->ts
= sym
->ts
;
4741 sym
->attr
.proc_pointer
= 0;
4742 sym
->attr
.pointer
= 0;
4743 sym
->attr
.external
= 0;
4744 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4746 sym
->result
->attr
.pointer
= 0;
4747 sym
->result
->attr
.proc_pointer
= 1;
4750 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4752 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4753 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4754 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4755 && sym
== gfc_current_ns
->proc_name
4756 && sym
== sym
->result
->ns
->proc_name
4757 && strcmp ("ppr@", sym
->result
->name
) == 0)
4759 sym
->result
->attr
.proc_pointer
= 1;
4760 sym
->attr
.pointer
= 0;
4768 /* Match the interface for a PROCEDURE declaration,
4769 including brackets (R1212). */
4772 match_procedure_interface (gfc_symbol
**proc_if
)
4776 locus old_loc
, entry_loc
;
4777 gfc_namespace
*old_ns
= gfc_current_ns
;
4778 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4780 old_loc
= entry_loc
= gfc_current_locus
;
4781 gfc_clear_ts (¤t_ts
);
4783 if (gfc_match (" (") != MATCH_YES
)
4785 gfc_current_locus
= entry_loc
;
4789 /* Get the type spec. for the procedure interface. */
4790 old_loc
= gfc_current_locus
;
4791 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4792 gfc_gobble_whitespace ();
4793 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4796 if (m
== MATCH_ERROR
)
4799 /* Procedure interface is itself a procedure. */
4800 gfc_current_locus
= old_loc
;
4801 m
= gfc_match_name (name
);
4803 /* First look to see if it is already accessible in the current
4804 namespace because it is use associated or contained. */
4806 if (gfc_find_sym_tree (name
, NULL
, 0, &st
))
4809 /* If it is still not found, then try the parent namespace, if it
4810 exists and create the symbol there if it is still not found. */
4811 if (gfc_current_ns
->parent
)
4812 gfc_current_ns
= gfc_current_ns
->parent
;
4813 if (st
== NULL
&& gfc_get_ha_sym_tree (name
, &st
))
4816 gfc_current_ns
= old_ns
;
4817 *proc_if
= st
->n
.sym
;
4822 /* Resolve interface if possible. That way, attr.procedure is only set
4823 if it is declared by a later procedure-declaration-stmt, which is
4824 invalid per F08:C1216 (cf. resolve_procedure_interface). */
4825 while ((*proc_if
)->ts
.interface
)
4826 *proc_if
= (*proc_if
)->ts
.interface
;
4828 if ((*proc_if
)->attr
.flavor
== FL_UNKNOWN
4829 && (*proc_if
)->ts
.type
== BT_UNKNOWN
4830 && !gfc_add_flavor (&(*proc_if
)->attr
, FL_PROCEDURE
,
4831 (*proc_if
)->name
, NULL
))
4836 if (gfc_match (" )") != MATCH_YES
)
4838 gfc_current_locus
= entry_loc
;
4846 /* Match a PROCEDURE declaration (R1211). */
4849 match_procedure_decl (void)
4852 gfc_symbol
*sym
, *proc_if
= NULL
;
4854 gfc_expr
*initializer
= NULL
;
4856 /* Parse interface (with brackets). */
4857 m
= match_procedure_interface (&proc_if
);
4861 /* Parse attributes (with colons). */
4862 m
= match_attr_spec();
4863 if (m
== MATCH_ERROR
)
4866 if (proc_if
&& proc_if
->attr
.is_bind_c
&& !current_attr
.is_bind_c
)
4868 current_attr
.is_bind_c
= 1;
4869 has_name_equals
= 0;
4870 curr_binding_label
= NULL
;
4873 /* Get procedure symbols. */
4876 m
= gfc_match_symbol (&sym
, 0);
4879 else if (m
== MATCH_ERROR
)
4882 /* Add current_attr to the symbol attributes. */
4883 if (!gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
))
4886 if (sym
->attr
.is_bind_c
)
4888 /* Check for C1218. */
4889 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4891 gfc_error ("BIND(C) attribute at %C requires "
4892 "an interface with BIND(C)");
4895 /* Check for C1217. */
4896 if (has_name_equals
&& sym
->attr
.pointer
)
4898 gfc_error ("BIND(C) procedure with NAME may not have "
4899 "POINTER attribute at %C");
4902 if (has_name_equals
&& sym
->attr
.dummy
)
4904 gfc_error ("Dummy procedure at %C may not have "
4905 "BIND(C) attribute with NAME");
4908 /* Set binding label for BIND(C). */
4909 if (!set_binding_label (&sym
->binding_label
, sym
->name
, num
))
4913 if (!gfc_add_external (&sym
->attr
, NULL
))
4916 if (add_hidden_procptr_result (sym
))
4919 if (!gfc_add_proc (&sym
->attr
, sym
->name
, NULL
))
4922 /* Set interface. */
4923 if (proc_if
!= NULL
)
4925 if (sym
->ts
.type
!= BT_UNKNOWN
)
4927 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4928 sym
->name
, &gfc_current_locus
,
4929 gfc_basic_typename (sym
->ts
.type
));
4932 sym
->ts
.interface
= proc_if
;
4933 sym
->attr
.untyped
= 1;
4934 sym
->attr
.if_source
= IFSRC_IFBODY
;
4936 else if (current_ts
.type
!= BT_UNKNOWN
)
4938 if (!gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
))
4940 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4941 sym
->ts
.interface
->ts
= current_ts
;
4942 sym
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
4943 sym
->ts
.interface
->attr
.function
= 1;
4944 sym
->attr
.function
= 1;
4945 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
4948 if (gfc_match (" =>") == MATCH_YES
)
4950 if (!current_attr
.pointer
)
4952 gfc_error ("Initialization at %C isn't for a pointer variable");
4957 m
= match_pointer_init (&initializer
, 1);
4961 if (!add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
))
4966 if (gfc_match_eos () == MATCH_YES
)
4968 if (gfc_match_char (',') != MATCH_YES
)
4973 gfc_error ("Syntax error in PROCEDURE statement at %C");
4977 /* Free stuff up and return. */
4978 gfc_free_expr (initializer
);
4984 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
4987 /* Match a procedure pointer component declaration (R445). */
4990 match_ppc_decl (void)
4993 gfc_symbol
*proc_if
= NULL
;
4997 gfc_expr
*initializer
= NULL
;
4998 gfc_typebound_proc
* tb
;
4999 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5001 /* Parse interface (with brackets). */
5002 m
= match_procedure_interface (&proc_if
);
5006 /* Parse attributes. */
5007 tb
= XCNEW (gfc_typebound_proc
);
5008 tb
->where
= gfc_current_locus
;
5009 m
= match_binding_attributes (tb
, false, true);
5010 if (m
== MATCH_ERROR
)
5013 gfc_clear_attr (¤t_attr
);
5014 current_attr
.procedure
= 1;
5015 current_attr
.proc_pointer
= 1;
5016 current_attr
.access
= tb
->access
;
5017 current_attr
.flavor
= FL_PROCEDURE
;
5019 /* Match the colons (required). */
5020 if (gfc_match (" ::") != MATCH_YES
)
5022 gfc_error ("Expected '::' after binding-attributes at %C");
5026 /* Check for C450. */
5027 if (!tb
->nopass
&& proc_if
== NULL
)
5029 gfc_error("NOPASS or explicit interface required at %C");
5033 if (!gfc_notify_std (GFC_STD_F2003
, "Procedure pointer component at %C"))
5036 /* Match PPC names. */
5040 m
= gfc_match_name (name
);
5043 else if (m
== MATCH_ERROR
)
5046 if (!gfc_add_component (gfc_current_block(), name
, &c
))
5049 /* Add current_attr to the symbol attributes. */
5050 if (!gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
))
5053 if (!gfc_add_external (&c
->attr
, NULL
))
5056 if (!gfc_add_proc (&c
->attr
, name
, NULL
))
5063 c
->tb
= XCNEW (gfc_typebound_proc
);
5064 c
->tb
->where
= gfc_current_locus
;
5068 /* Set interface. */
5069 if (proc_if
!= NULL
)
5071 c
->ts
.interface
= proc_if
;
5072 c
->attr
.untyped
= 1;
5073 c
->attr
.if_source
= IFSRC_IFBODY
;
5075 else if (ts
.type
!= BT_UNKNOWN
)
5078 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
5079 c
->ts
.interface
->result
= c
->ts
.interface
;
5080 c
->ts
.interface
->ts
= ts
;
5081 c
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
5082 c
->ts
.interface
->attr
.function
= 1;
5083 c
->attr
.function
= 1;
5084 c
->attr
.if_source
= IFSRC_UNKNOWN
;
5087 if (gfc_match (" =>") == MATCH_YES
)
5089 m
= match_pointer_init (&initializer
, 1);
5092 gfc_free_expr (initializer
);
5095 c
->initializer
= initializer
;
5098 if (gfc_match_eos () == MATCH_YES
)
5100 if (gfc_match_char (',') != MATCH_YES
)
5105 gfc_error ("Syntax error in procedure pointer component at %C");
5110 /* Match a PROCEDURE declaration inside an interface (R1206). */
5113 match_procedure_in_interface (void)
5117 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5120 if (current_interface
.type
== INTERFACE_NAMELESS
5121 || current_interface
.type
== INTERFACE_ABSTRACT
)
5123 gfc_error ("PROCEDURE at %C must be in a generic interface");
5127 /* Check if the F2008 optional double colon appears. */
5128 gfc_gobble_whitespace ();
5129 old_locus
= gfc_current_locus
;
5130 if (gfc_match ("::") == MATCH_YES
)
5132 if (!gfc_notify_std (GFC_STD_F2008
, "double colon in "
5133 "MODULE PROCEDURE statement at %L", &old_locus
))
5137 gfc_current_locus
= old_locus
;
5141 m
= gfc_match_name (name
);
5144 else if (m
== MATCH_ERROR
)
5146 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
5149 if (!gfc_add_interface (sym
))
5152 if (gfc_match_eos () == MATCH_YES
)
5154 if (gfc_match_char (',') != MATCH_YES
)
5161 gfc_error ("Syntax error in PROCEDURE statement at %C");
5166 /* General matcher for PROCEDURE declarations. */
5168 static match
match_procedure_in_type (void);
5171 gfc_match_procedure (void)
5175 switch (gfc_current_state ())
5180 case COMP_SUBROUTINE
:
5183 m
= match_procedure_decl ();
5185 case COMP_INTERFACE
:
5186 m
= match_procedure_in_interface ();
5189 m
= match_ppc_decl ();
5191 case COMP_DERIVED_CONTAINS
:
5192 m
= match_procedure_in_type ();
5201 if (!gfc_notify_std (GFC_STD_F2003
, "PROCEDURE statement at %C"))
5208 /* Warn if a matched procedure has the same name as an intrinsic; this is
5209 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
5210 parser-state-stack to find out whether we're in a module. */
5213 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
5217 in_module
= (gfc_state_stack
->previous
5218 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
5220 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
5224 /* Match a function declaration. */
5227 gfc_match_function_decl (void)
5229 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5230 gfc_symbol
*sym
, *result
;
5234 match found_match
; /* Status returned by match func. */
5236 if (gfc_current_state () != COMP_NONE
5237 && gfc_current_state () != COMP_INTERFACE
5238 && gfc_current_state () != COMP_CONTAINS
)
5241 gfc_clear_ts (¤t_ts
);
5243 old_loc
= gfc_current_locus
;
5245 m
= gfc_match_prefix (¤t_ts
);
5248 gfc_current_locus
= old_loc
;
5252 if (gfc_match ("function% %n", name
) != MATCH_YES
)
5254 gfc_current_locus
= old_loc
;
5257 if (get_proc_name (name
, &sym
, false))
5260 if (add_hidden_procptr_result (sym
))
5263 gfc_new_block
= sym
;
5265 m
= gfc_match_formal_arglist (sym
, 0, 0);
5268 gfc_error ("Expected formal argument list in function "
5269 "definition at %C");
5273 else if (m
== MATCH_ERROR
)
5278 /* According to the draft, the bind(c) and result clause can
5279 come in either order after the formal_arg_list (i.e., either
5280 can be first, both can exist together or by themselves or neither
5281 one). Therefore, the match_result can't match the end of the
5282 string, and check for the bind(c) or result clause in either order. */
5283 found_match
= gfc_match_eos ();
5285 /* Make sure that it isn't already declared as BIND(C). If it is, it
5286 must have been marked BIND(C) with a BIND(C) attribute and that is
5287 not allowed for procedures. */
5288 if (sym
->attr
.is_bind_c
== 1)
5290 sym
->attr
.is_bind_c
= 0;
5291 if (sym
->old_symbol
!= NULL
)
5292 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5293 "variables or common blocks",
5294 &(sym
->old_symbol
->declared_at
));
5296 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5297 "variables or common blocks", &gfc_current_locus
);
5300 if (found_match
!= MATCH_YES
)
5302 /* If we haven't found the end-of-statement, look for a suffix. */
5303 suffix_match
= gfc_match_suffix (sym
, &result
);
5304 if (suffix_match
== MATCH_YES
)
5305 /* Need to get the eos now. */
5306 found_match
= gfc_match_eos ();
5308 found_match
= suffix_match
;
5311 if(found_match
!= MATCH_YES
)
5315 /* Make changes to the symbol. */
5318 if (!gfc_add_function (&sym
->attr
, sym
->name
, NULL
))
5321 if (!gfc_missing_attr (&sym
->attr
, NULL
)
5322 || !copy_prefix (&sym
->attr
, &sym
->declared_at
))
5325 /* Delay matching the function characteristics until after the
5326 specification block by signalling kind=-1. */
5327 sym
->declared_at
= old_loc
;
5328 if (current_ts
.type
!= BT_UNKNOWN
)
5329 current_ts
.kind
= -1;
5331 current_ts
.kind
= 0;
5335 if (current_ts
.type
!= BT_UNKNOWN
5336 && !gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
))
5342 if (current_ts
.type
!= BT_UNKNOWN
5343 && !gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
))
5345 sym
->result
= result
;
5348 /* Warn if this procedure has the same name as an intrinsic. */
5349 warn_intrinsic_shadow (sym
, true);
5355 gfc_current_locus
= old_loc
;
5360 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
5361 pass the name of the entry, rather than the gfc_current_block name, and
5362 to return false upon finding an existing global entry. */
5365 add_global_entry (const char *name
, const char *binding_label
, bool sub
,
5369 enum gfc_symbol_type type
;
5371 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
5373 /* Only in Fortran 2003: For procedures with a binding label also the Fortran
5374 name is a global identifier. */
5375 if (!binding_label
|| gfc_notification_std (GFC_STD_F2008
))
5377 s
= gfc_get_gsymbol (name
);
5379 if (s
->defined
|| (s
->type
!= GSYM_UNKNOWN
&& s
->type
!= type
))
5381 gfc_global_used (s
, where
);
5390 s
->ns
= gfc_current_ns
;
5394 /* Don't add the symbol multiple times. */
5396 && (!gfc_notification_std (GFC_STD_F2008
)
5397 || strcmp (name
, binding_label
) != 0))
5399 s
= gfc_get_gsymbol (binding_label
);
5401 if (s
->defined
|| (s
->type
!= GSYM_UNKNOWN
&& s
->type
!= type
))
5403 gfc_global_used (s
, where
);
5410 s
->binding_label
= binding_label
;
5413 s
->ns
= gfc_current_ns
;
5421 /* Match an ENTRY statement. */
5424 gfc_match_entry (void)
5429 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5430 gfc_compile_state state
;
5434 bool module_procedure
;
5438 m
= gfc_match_name (name
);
5442 if (!gfc_notify_std (GFC_STD_F2008_OBS
, "ENTRY statement at %C"))
5445 state
= gfc_current_state ();
5446 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
5451 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
5454 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
5456 case COMP_BLOCK_DATA
:
5457 gfc_error ("ENTRY statement at %C cannot appear within "
5460 case COMP_INTERFACE
:
5461 gfc_error ("ENTRY statement at %C cannot appear within "
5465 gfc_error ("ENTRY statement at %C cannot appear within "
5466 "a DERIVED TYPE block");
5469 gfc_error ("ENTRY statement at %C cannot appear within "
5470 "an IF-THEN block");
5473 case COMP_DO_CONCURRENT
:
5474 gfc_error ("ENTRY statement at %C cannot appear within "
5478 gfc_error ("ENTRY statement at %C cannot appear within "
5482 gfc_error ("ENTRY statement at %C cannot appear within "
5486 gfc_error ("ENTRY statement at %C cannot appear within "
5490 gfc_error ("ENTRY statement at %C cannot appear within "
5491 "a contained subprogram");
5494 gfc_internal_error ("gfc_match_entry(): Bad state");
5499 module_procedure
= gfc_current_ns
->parent
!= NULL
5500 && gfc_current_ns
->parent
->proc_name
5501 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
5504 if (gfc_current_ns
->parent
!= NULL
5505 && gfc_current_ns
->parent
->proc_name
5506 && !module_procedure
)
5508 gfc_error("ENTRY statement at %C cannot appear in a "
5509 "contained procedure");
5513 /* Module function entries need special care in get_proc_name
5514 because previous references within the function will have
5515 created symbols attached to the current namespace. */
5516 if (get_proc_name (name
, &entry
,
5517 gfc_current_ns
->parent
!= NULL
5518 && module_procedure
))
5521 proc
= gfc_current_block ();
5523 /* Make sure that it isn't already declared as BIND(C). If it is, it
5524 must have been marked BIND(C) with a BIND(C) attribute and that is
5525 not allowed for procedures. */
5526 if (entry
->attr
.is_bind_c
== 1)
5528 entry
->attr
.is_bind_c
= 0;
5529 if (entry
->old_symbol
!= NULL
)
5530 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5531 "variables or common blocks",
5532 &(entry
->old_symbol
->declared_at
));
5534 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5535 "variables or common blocks", &gfc_current_locus
);
5538 /* Check what next non-whitespace character is so we can tell if there
5539 is the required parens if we have a BIND(C). */
5540 old_loc
= gfc_current_locus
;
5541 gfc_gobble_whitespace ();
5542 peek_char
= gfc_peek_ascii_char ();
5544 if (state
== COMP_SUBROUTINE
)
5546 m
= gfc_match_formal_arglist (entry
, 0, 1);
5550 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5551 never be an internal procedure. */
5552 is_bind_c
= gfc_match_bind_c (entry
, true);
5553 if (is_bind_c
== MATCH_ERROR
)
5555 if (is_bind_c
== MATCH_YES
)
5557 if (peek_char
!= '(')
5559 gfc_error ("Missing required parentheses before BIND(C) at %C");
5562 if (!gfc_add_is_bind_c (&(entry
->attr
), entry
->name
,
5563 &(entry
->declared_at
), 1))
5567 if (!gfc_current_ns
->parent
5568 && !add_global_entry (name
, entry
->binding_label
, true,
5572 /* An entry in a subroutine. */
5573 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5574 || !gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
))
5579 /* An entry in a function.
5580 We need to take special care because writing
5585 ENTRY f() RESULT (r)
5587 ENTRY f RESULT (r). */
5588 if (gfc_match_eos () == MATCH_YES
)
5590 gfc_current_locus
= old_loc
;
5591 /* Match the empty argument list, and add the interface to
5593 m
= gfc_match_formal_arglist (entry
, 0, 1);
5596 m
= gfc_match_formal_arglist (entry
, 0, 0);
5603 if (gfc_match_eos () == MATCH_YES
)
5605 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5606 || !gfc_add_function (&entry
->attr
, entry
->name
, NULL
))
5609 entry
->result
= entry
;
5613 m
= gfc_match_suffix (entry
, &result
);
5615 gfc_syntax_error (ST_ENTRY
);
5621 if (!gfc_add_result (&result
->attr
, result
->name
, NULL
)
5622 || !gfc_add_entry (&entry
->attr
, result
->name
, NULL
)
5623 || !gfc_add_function (&entry
->attr
, result
->name
, NULL
))
5625 entry
->result
= result
;
5629 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5630 || !gfc_add_function (&entry
->attr
, entry
->name
, NULL
))
5632 entry
->result
= entry
;
5636 if (!gfc_current_ns
->parent
5637 && !add_global_entry (name
, entry
->binding_label
, false,
5642 if (gfc_match_eos () != MATCH_YES
)
5644 gfc_syntax_error (ST_ENTRY
);
5648 entry
->attr
.recursive
= proc
->attr
.recursive
;
5649 entry
->attr
.elemental
= proc
->attr
.elemental
;
5650 entry
->attr
.pure
= proc
->attr
.pure
;
5652 el
= gfc_get_entry_list ();
5654 el
->next
= gfc_current_ns
->entries
;
5655 gfc_current_ns
->entries
= el
;
5657 el
->id
= el
->next
->id
+ 1;
5661 new_st
.op
= EXEC_ENTRY
;
5662 new_st
.ext
.entry
= el
;
5668 /* Match a subroutine statement, including optional prefixes. */
5671 gfc_match_subroutine (void)
5673 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5678 bool allow_binding_name
;
5680 if (gfc_current_state () != COMP_NONE
5681 && gfc_current_state () != COMP_INTERFACE
5682 && gfc_current_state () != COMP_CONTAINS
)
5685 m
= gfc_match_prefix (NULL
);
5689 m
= gfc_match ("subroutine% %n", name
);
5693 if (get_proc_name (name
, &sym
, false))
5696 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5697 the symbol existed before. */
5698 sym
->declared_at
= gfc_current_locus
;
5700 if (add_hidden_procptr_result (sym
))
5703 gfc_new_block
= sym
;
5705 /* Check what next non-whitespace character is so we can tell if there
5706 is the required parens if we have a BIND(C). */
5707 gfc_gobble_whitespace ();
5708 peek_char
= gfc_peek_ascii_char ();
5710 if (!gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
))
5713 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5716 /* Make sure that it isn't already declared as BIND(C). If it is, it
5717 must have been marked BIND(C) with a BIND(C) attribute and that is
5718 not allowed for procedures. */
5719 if (sym
->attr
.is_bind_c
== 1)
5721 sym
->attr
.is_bind_c
= 0;
5722 if (sym
->old_symbol
!= NULL
)
5723 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5724 "variables or common blocks",
5725 &(sym
->old_symbol
->declared_at
));
5727 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5728 "variables or common blocks", &gfc_current_locus
);
5731 /* C binding names are not allowed for internal procedures. */
5732 if (gfc_current_state () == COMP_CONTAINS
5733 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5734 allow_binding_name
= false;
5736 allow_binding_name
= true;
5738 /* Here, we are just checking if it has the bind(c) attribute, and if
5739 so, then we need to make sure it's all correct. If it doesn't,
5740 we still need to continue matching the rest of the subroutine line. */
5741 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5742 if (is_bind_c
== MATCH_ERROR
)
5744 /* There was an attempt at the bind(c), but it was wrong. An
5745 error message should have been printed w/in the gfc_match_bind_c
5746 so here we'll just return the MATCH_ERROR. */
5750 if (is_bind_c
== MATCH_YES
)
5752 /* The following is allowed in the Fortran 2008 draft. */
5753 if (gfc_current_state () == COMP_CONTAINS
5754 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5755 && !gfc_notify_std (GFC_STD_F2008
, "BIND(C) attribute "
5756 "at %L may not be specified for an internal "
5757 "procedure", &gfc_current_locus
))
5760 if (peek_char
!= '(')
5762 gfc_error ("Missing required parentheses before BIND(C) at %C");
5765 if (!gfc_add_is_bind_c (&(sym
->attr
), sym
->name
,
5766 &(sym
->declared_at
), 1))
5770 if (gfc_match_eos () != MATCH_YES
)
5772 gfc_syntax_error (ST_SUBROUTINE
);
5776 if (!copy_prefix (&sym
->attr
, &sym
->declared_at
))
5779 /* Warn if it has the same name as an intrinsic. */
5780 warn_intrinsic_shadow (sym
, false);
5786 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5787 given, and set the binding label in either the given symbol (if not
5788 NULL), or in the current_ts. The symbol may be NULL because we may
5789 encounter the BIND(C) before the declaration itself. Return
5790 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5791 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5792 or MATCH_YES if the specifier was correct and the binding label and
5793 bind(c) fields were set correctly for the given symbol or the
5794 current_ts. If allow_binding_name is false, no binding name may be
5798 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5800 /* binding label, if exists */
5801 const char* binding_label
= NULL
;
5805 /* Initialize the flag that specifies whether we encountered a NAME=
5806 specifier or not. */
5807 has_name_equals
= 0;
5809 /* This much we have to be able to match, in this order, if
5810 there is a bind(c) label. */
5811 if (gfc_match (" bind ( c ") != MATCH_YES
)
5814 /* Now see if there is a binding label, or if we've reached the
5815 end of the bind(c) attribute without one. */
5816 if (gfc_match_char (',') == MATCH_YES
)
5818 if (gfc_match (" name = ") != MATCH_YES
)
5820 gfc_error ("Syntax error in NAME= specifier for binding label "
5822 /* should give an error message here */
5826 has_name_equals
= 1;
5828 /* Get the opening quote. */
5829 double_quote
= MATCH_YES
;
5830 single_quote
= MATCH_YES
;
5831 double_quote
= gfc_match_char ('"');
5832 if (double_quote
!= MATCH_YES
)
5833 single_quote
= gfc_match_char ('\'');
5834 if (double_quote
!= MATCH_YES
&& single_quote
!= MATCH_YES
)
5836 gfc_error ("Syntax error in NAME= specifier for binding label "
5841 /* Grab the binding label, using functions that will not lower
5842 case the names automatically. */
5843 if (gfc_match_name_C (&binding_label
) != MATCH_YES
)
5846 /* Get the closing quotation. */
5847 if (double_quote
== MATCH_YES
)
5849 if (gfc_match_char ('"') != MATCH_YES
)
5851 gfc_error ("Missing closing quote '\"' for binding label at %C");
5852 /* User started string with '"' so looked to match it. */
5858 if (gfc_match_char ('\'') != MATCH_YES
)
5860 gfc_error ("Missing closing quote '\'' for binding label at %C");
5861 /* User started string with "'" char. */
5867 /* Get the required right paren. */
5868 if (gfc_match_char (')') != MATCH_YES
)
5870 gfc_error ("Missing closing paren for binding label at %C");
5874 if (has_name_equals
&& !allow_binding_name
)
5876 gfc_error ("No binding name is allowed in BIND(C) at %C");
5880 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5882 gfc_error ("For dummy procedure %s, no binding name is "
5883 "allowed in BIND(C) at %C", sym
->name
);
5888 /* Save the binding label to the symbol. If sym is null, we're
5889 probably matching the typespec attributes of a declaration and
5890 haven't gotten the name yet, and therefore, no symbol yet. */
5894 sym
->binding_label
= binding_label
;
5896 curr_binding_label
= binding_label
;
5898 else if (allow_binding_name
)
5900 /* No binding label, but if symbol isn't null, we
5901 can set the label for it here.
5902 If name="" or allow_binding_name is false, no C binding name is
5904 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
5905 sym
->binding_label
= IDENTIFIER_POINTER (get_identifier (sym
->name
));
5908 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
5909 && current_interface
.type
== INTERFACE_ABSTRACT
)
5911 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5919 /* Return nonzero if we're currently compiling a contained procedure. */
5922 contained_procedure (void)
5924 gfc_state_data
*s
= gfc_state_stack
;
5926 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
5927 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
5933 /* Set the kind of each enumerator. The kind is selected such that it is
5934 interoperable with the corresponding C enumeration type, making
5935 sure that -fshort-enums is honored. */
5940 enumerator_history
*current_history
= NULL
;
5944 if (max_enum
== NULL
|| enum_history
== NULL
)
5947 if (!flag_short_enums
)
5953 kind
= gfc_integer_kinds
[i
++].kind
;
5955 while (kind
< gfc_c_int_kind
5956 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
5959 current_history
= enum_history
;
5960 while (current_history
!= NULL
)
5962 current_history
->sym
->ts
.kind
= kind
;
5963 current_history
= current_history
->next
;
5968 /* Match any of the various end-block statements. Returns the type of
5969 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5970 and END BLOCK statements cannot be replaced by a single END statement. */
5973 gfc_match_end (gfc_statement
*st
)
5975 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5976 gfc_compile_state state
;
5978 const char *block_name
;
5982 gfc_namespace
*parent_ns
, *ns
, *prev_ns
;
5983 gfc_namespace
**nsp
;
5985 old_loc
= gfc_current_locus
;
5986 if (gfc_match ("end") != MATCH_YES
)
5989 state
= gfc_current_state ();
5990 block_name
= gfc_current_block () == NULL
5991 ? NULL
: gfc_current_block ()->name
;
5995 case COMP_ASSOCIATE
:
5997 if (!strncmp (block_name
, "block@", strlen("block@")))
6002 case COMP_DERIVED_CONTAINS
:
6003 state
= gfc_state_stack
->previous
->state
;
6004 block_name
= gfc_state_stack
->previous
->sym
== NULL
6005 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
6016 *st
= ST_END_PROGRAM
;
6017 target
= " program";
6021 case COMP_SUBROUTINE
:
6022 *st
= ST_END_SUBROUTINE
;
6023 target
= " subroutine";
6024 eos_ok
= !contained_procedure ();
6028 *st
= ST_END_FUNCTION
;
6029 target
= " function";
6030 eos_ok
= !contained_procedure ();
6033 case COMP_BLOCK_DATA
:
6034 *st
= ST_END_BLOCK_DATA
;
6035 target
= " block data";
6040 *st
= ST_END_MODULE
;
6045 case COMP_INTERFACE
:
6046 *st
= ST_END_INTERFACE
;
6047 target
= " interface";
6052 case COMP_DERIVED_CONTAINS
:
6058 case COMP_ASSOCIATE
:
6059 *st
= ST_END_ASSOCIATE
;
6060 target
= " associate";
6077 case COMP_DO_CONCURRENT
:
6084 *st
= ST_END_CRITICAL
;
6085 target
= " critical";
6090 case COMP_SELECT_TYPE
:
6091 *st
= ST_END_SELECT
;
6097 *st
= ST_END_FORALL
;
6112 last_initializer
= NULL
;
6114 gfc_free_enum_history ();
6118 gfc_error ("Unexpected END statement at %C");
6122 old_loc
= gfc_current_locus
;
6123 if (gfc_match_eos () == MATCH_YES
)
6125 if (!eos_ok
&& (*st
== ST_END_SUBROUTINE
|| *st
== ST_END_FUNCTION
))
6127 if (!gfc_notify_std (GFC_STD_F2008
, "END statement "
6128 "instead of %s statement at %L",
6129 gfc_ascii_statement(*st
), &old_loc
))
6134 /* We would have required END [something]. */
6135 gfc_error ("%s statement expected at %L",
6136 gfc_ascii_statement (*st
), &old_loc
);
6143 /* Verify that we've got the sort of end-block that we're expecting. */
6144 if (gfc_match (target
) != MATCH_YES
)
6146 gfc_error ("Expecting %s statement at %L", gfc_ascii_statement (*st
),
6151 old_loc
= gfc_current_locus
;
6152 /* If we're at the end, make sure a block name wasn't required. */
6153 if (gfc_match_eos () == MATCH_YES
)
6156 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
6157 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
&& *st
!= ST_END_BLOCK
6158 && *st
!= ST_END_ASSOCIATE
&& *st
!= ST_END_CRITICAL
)
6164 gfc_error ("Expected block name of '%s' in %s statement at %L",
6165 block_name
, gfc_ascii_statement (*st
), &old_loc
);
6170 /* END INTERFACE has a special handler for its several possible endings. */
6171 if (*st
== ST_END_INTERFACE
)
6172 return gfc_match_end_interface ();
6174 /* We haven't hit the end of statement, so what is left must be an
6176 m
= gfc_match_space ();
6178 m
= gfc_match_name (name
);
6181 gfc_error ("Expected terminating name at %C");
6185 if (block_name
== NULL
)
6188 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
6190 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
6191 gfc_ascii_statement (*st
));
6194 /* Procedure pointer as function result. */
6195 else if (strcmp (block_name
, "ppr@") == 0
6196 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
6198 gfc_error ("Expected label '%s' for %s statement at %C",
6199 gfc_current_block ()->ns
->proc_name
->name
,
6200 gfc_ascii_statement (*st
));
6204 if (gfc_match_eos () == MATCH_YES
)
6208 gfc_syntax_error (*st
);
6211 gfc_current_locus
= old_loc
;
6213 /* If we are missing an END BLOCK, we created a half-ready namespace.
6214 Remove it from the parent namespace's sibling list. */
6216 if (state
== COMP_BLOCK
)
6218 parent_ns
= gfc_current_ns
->parent
;
6220 nsp
= &(gfc_state_stack
->previous
->tail
->ext
.block
.ns
);
6226 if (ns
== gfc_current_ns
)
6228 if (prev_ns
== NULL
)
6231 prev_ns
->sibling
= ns
->sibling
;
6237 gfc_free_namespace (gfc_current_ns
);
6238 gfc_current_ns
= parent_ns
;
6246 /***************** Attribute declaration statements ****************/
6248 /* Set the attribute of a single variable. */
6253 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6261 m
= gfc_match_name (name
);
6265 if (find_special (name
, &sym
, false))
6268 if (!check_function_name (name
))
6274 var_locus
= gfc_current_locus
;
6276 /* Deal with possible array specification for certain attributes. */
6277 if (current_attr
.dimension
6278 || current_attr
.codimension
6279 || current_attr
.allocatable
6280 || current_attr
.pointer
6281 || current_attr
.target
)
6283 m
= gfc_match_array_spec (&as
, !current_attr
.codimension
,
6284 !current_attr
.dimension
6285 && !current_attr
.pointer
6286 && !current_attr
.target
);
6287 if (m
== MATCH_ERROR
)
6290 if (current_attr
.dimension
&& m
== MATCH_NO
)
6292 gfc_error ("Missing array specification at %L in DIMENSION "
6293 "statement", &var_locus
);
6298 if (current_attr
.dimension
&& sym
->value
)
6300 gfc_error ("Dimensions specified for %s at %L after its "
6301 "initialisation", sym
->name
, &var_locus
);
6306 if (current_attr
.codimension
&& m
== MATCH_NO
)
6308 gfc_error ("Missing array specification at %L in CODIMENSION "
6309 "statement", &var_locus
);
6314 if ((current_attr
.allocatable
|| current_attr
.pointer
)
6315 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
6317 gfc_error ("Array specification must be deferred at %L", &var_locus
);
6323 /* Update symbol table. DIMENSION attribute is set in
6324 gfc_set_array_spec(). For CLASS variables, this must be applied
6325 to the first component, or '_data' field. */
6326 if (sym
->ts
.type
== BT_CLASS
&& sym
->ts
.u
.derived
->attr
.is_class
)
6328 if (!gfc_copy_attr (&CLASS_DATA(sym
)->attr
, ¤t_attr
, &var_locus
))
6336 if (current_attr
.dimension
== 0 && current_attr
.codimension
== 0
6337 && !gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
))
6344 if (sym
->ts
.type
== BT_CLASS
6345 && !gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
, false))
6351 if (!gfc_set_array_spec (sym
, as
, &var_locus
))
6357 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
6359 /* Fix the array spec. */
6360 m
= gfc_mod_pointee_as (sym
->as
);
6361 if (m
== MATCH_ERROR
)
6365 if (!gfc_add_attribute (&sym
->attr
, &var_locus
))
6371 if ((current_attr
.external
|| current_attr
.intrinsic
)
6372 && sym
->attr
.flavor
!= FL_PROCEDURE
6373 && !gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
))
6379 add_hidden_procptr_result (sym
);
6384 gfc_free_array_spec (as
);
6389 /* Generic attribute declaration subroutine. Used for attributes that
6390 just have a list of names. */
6397 /* Gobble the optional double colon, by simply ignoring the result
6407 if (gfc_match_eos () == MATCH_YES
)
6413 if (gfc_match_char (',') != MATCH_YES
)
6415 gfc_error ("Unexpected character in variable list at %C");
6425 /* This routine matches Cray Pointer declarations of the form:
6426 pointer ( <pointer>, <pointee> )
6428 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
6429 The pointer, if already declared, should be an integer. Otherwise, we
6430 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
6431 be either a scalar, or an array declaration. No space is allocated for
6432 the pointee. For the statement
6433 pointer (ipt, ar(10))
6434 any subsequent uses of ar will be translated (in C-notation) as
6435 ar(i) => ((<type> *) ipt)(i)
6436 After gimplification, pointee variable will disappear in the code. */
6439 cray_pointer_decl (void)
6442 gfc_array_spec
*as
= NULL
;
6443 gfc_symbol
*cptr
; /* Pointer symbol. */
6444 gfc_symbol
*cpte
; /* Pointee symbol. */
6450 if (gfc_match_char ('(') != MATCH_YES
)
6452 gfc_error ("Expected '(' at %C");
6456 /* Match pointer. */
6457 var_locus
= gfc_current_locus
;
6458 gfc_clear_attr (¤t_attr
);
6459 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
6460 current_ts
.type
= BT_INTEGER
;
6461 current_ts
.kind
= gfc_index_integer_kind
;
6463 m
= gfc_match_symbol (&cptr
, 0);
6466 gfc_error ("Expected variable name at %C");
6470 if (!gfc_add_cray_pointer (&cptr
->attr
, &var_locus
))
6473 gfc_set_sym_referenced (cptr
);
6475 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
6477 cptr
->ts
.type
= BT_INTEGER
;
6478 cptr
->ts
.kind
= gfc_index_integer_kind
;
6480 else if (cptr
->ts
.type
!= BT_INTEGER
)
6482 gfc_error ("Cray pointer at %C must be an integer");
6485 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
6486 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
6487 " memory addresses require %d bytes",
6488 cptr
->ts
.kind
, gfc_index_integer_kind
);
6490 if (gfc_match_char (',') != MATCH_YES
)
6492 gfc_error ("Expected \",\" at %C");
6496 /* Match Pointee. */
6497 var_locus
= gfc_current_locus
;
6498 gfc_clear_attr (¤t_attr
);
6499 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
6500 current_ts
.type
= BT_UNKNOWN
;
6501 current_ts
.kind
= 0;
6503 m
= gfc_match_symbol (&cpte
, 0);
6506 gfc_error ("Expected variable name at %C");
6510 /* Check for an optional array spec. */
6511 m
= gfc_match_array_spec (&as
, true, false);
6512 if (m
== MATCH_ERROR
)
6514 gfc_free_array_spec (as
);
6517 else if (m
== MATCH_NO
)
6519 gfc_free_array_spec (as
);
6523 if (!gfc_add_cray_pointee (&cpte
->attr
, &var_locus
))
6526 gfc_set_sym_referenced (cpte
);
6528 if (cpte
->as
== NULL
)
6530 if (!gfc_set_array_spec (cpte
, as
, &var_locus
))
6531 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6533 else if (as
!= NULL
)
6535 gfc_error ("Duplicate array spec for Cray pointee at %C");
6536 gfc_free_array_spec (as
);
6542 if (cpte
->as
!= NULL
)
6544 /* Fix array spec. */
6545 m
= gfc_mod_pointee_as (cpte
->as
);
6546 if (m
== MATCH_ERROR
)
6550 /* Point the Pointee at the Pointer. */
6551 cpte
->cp_pointer
= cptr
;
6553 if (gfc_match_char (')') != MATCH_YES
)
6555 gfc_error ("Expected \")\" at %C");
6558 m
= gfc_match_char (',');
6560 done
= true; /* Stop searching for more declarations. */
6564 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
6565 || gfc_match_eos () != MATCH_YES
)
6567 gfc_error ("Expected \",\" or end of statement at %C");
6575 gfc_match_external (void)
6578 gfc_clear_attr (¤t_attr
);
6579 current_attr
.external
= 1;
6581 return attr_decl ();
6586 gfc_match_intent (void)
6590 /* This is not allowed within a BLOCK construct! */
6591 if (gfc_current_state () == COMP_BLOCK
)
6593 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6597 intent
= match_intent_spec ();
6598 if (intent
== INTENT_UNKNOWN
)
6601 gfc_clear_attr (¤t_attr
);
6602 current_attr
.intent
= intent
;
6604 return attr_decl ();
6609 gfc_match_intrinsic (void)
6612 gfc_clear_attr (¤t_attr
);
6613 current_attr
.intrinsic
= 1;
6615 return attr_decl ();
6620 gfc_match_optional (void)
6622 /* This is not allowed within a BLOCK construct! */
6623 if (gfc_current_state () == COMP_BLOCK
)
6625 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6629 gfc_clear_attr (¤t_attr
);
6630 current_attr
.optional
= 1;
6632 return attr_decl ();
6637 gfc_match_pointer (void)
6639 gfc_gobble_whitespace ();
6640 if (gfc_peek_ascii_char () == '(')
6642 if (!gfc_option
.flag_cray_pointer
)
6644 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6648 return cray_pointer_decl ();
6652 gfc_clear_attr (¤t_attr
);
6653 current_attr
.pointer
= 1;
6655 return attr_decl ();
6661 gfc_match_allocatable (void)
6663 gfc_clear_attr (¤t_attr
);
6664 current_attr
.allocatable
= 1;
6666 return attr_decl ();
6671 gfc_match_codimension (void)
6673 gfc_clear_attr (¤t_attr
);
6674 current_attr
.codimension
= 1;
6676 return attr_decl ();
6681 gfc_match_contiguous (void)
6683 if (!gfc_notify_std (GFC_STD_F2008
, "CONTIGUOUS statement at %C"))
6686 gfc_clear_attr (¤t_attr
);
6687 current_attr
.contiguous
= 1;
6689 return attr_decl ();
6694 gfc_match_dimension (void)
6696 gfc_clear_attr (¤t_attr
);
6697 current_attr
.dimension
= 1;
6699 return attr_decl ();
6704 gfc_match_target (void)
6706 gfc_clear_attr (¤t_attr
);
6707 current_attr
.target
= 1;
6709 return attr_decl ();
6713 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6717 access_attr_decl (gfc_statement st
)
6719 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6720 interface_type type
;
6722 gfc_symbol
*sym
, *dt_sym
;
6723 gfc_intrinsic_op op
;
6726 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6731 m
= gfc_match_generic_spec (&type
, name
, &op
);
6734 if (m
== MATCH_ERROR
)
6739 case INTERFACE_NAMELESS
:
6740 case INTERFACE_ABSTRACT
:
6743 case INTERFACE_GENERIC
:
6744 if (gfc_get_symbol (name
, NULL
, &sym
))
6747 if (!gfc_add_access (&sym
->attr
,
6749 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
6753 if (sym
->attr
.generic
&& (dt_sym
= gfc_find_dt_in_generic (sym
))
6754 && !gfc_add_access (&dt_sym
->attr
,
6756 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
6762 case INTERFACE_INTRINSIC_OP
:
6763 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
6765 gfc_intrinsic_op other_op
;
6767 gfc_current_ns
->operator_access
[op
] =
6768 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6770 /* Handle the case if there is another op with the same
6771 function, for INTRINSIC_EQ vs. INTRINSIC_EQ_OS and so on. */
6772 other_op
= gfc_equivalent_op (op
);
6774 if (other_op
!= INTRINSIC_NONE
)
6775 gfc_current_ns
->operator_access
[other_op
] =
6776 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6781 gfc_error ("Access specification of the %s operator at %C has "
6782 "already been specified", gfc_op2string (op
));
6788 case INTERFACE_USER_OP
:
6789 uop
= gfc_get_uop (name
);
6791 if (uop
->access
== ACCESS_UNKNOWN
)
6793 uop
->access
= (st
== ST_PUBLIC
)
6794 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6798 gfc_error ("Access specification of the .%s. operator at %C "
6799 "has already been specified", sym
->name
);
6806 if (gfc_match_char (',') == MATCH_NO
)
6810 if (gfc_match_eos () != MATCH_YES
)
6815 gfc_syntax_error (st
);
6823 gfc_match_protected (void)
6828 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6830 gfc_error ("PROTECTED at %C only allowed in specification "
6831 "part of a module");
6836 if (!gfc_notify_std (GFC_STD_F2003
, "PROTECTED statement at %C"))
6839 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6844 if (gfc_match_eos () == MATCH_YES
)
6849 m
= gfc_match_symbol (&sym
, 0);
6853 if (!gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
))
6865 if (gfc_match_eos () == MATCH_YES
)
6867 if (gfc_match_char (',') != MATCH_YES
)
6874 gfc_error ("Syntax error in PROTECTED statement at %C");
6879 /* The PRIVATE statement is a bit weird in that it can be an attribute
6880 declaration, but also works as a standalone statement inside of a
6881 type declaration or a module. */
6884 gfc_match_private (gfc_statement
*st
)
6887 if (gfc_match ("private") != MATCH_YES
)
6890 if (gfc_current_state () != COMP_MODULE
6891 && !(gfc_current_state () == COMP_DERIVED
6892 && gfc_state_stack
->previous
6893 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
6894 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6895 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
6896 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
6898 gfc_error ("PRIVATE statement at %C is only allowed in the "
6899 "specification part of a module");
6903 if (gfc_current_state () == COMP_DERIVED
)
6905 if (gfc_match_eos () == MATCH_YES
)
6911 gfc_syntax_error (ST_PRIVATE
);
6915 if (gfc_match_eos () == MATCH_YES
)
6922 return access_attr_decl (ST_PRIVATE
);
6927 gfc_match_public (gfc_statement
*st
)
6930 if (gfc_match ("public") != MATCH_YES
)
6933 if (gfc_current_state () != COMP_MODULE
)
6935 gfc_error ("PUBLIC statement at %C is only allowed in the "
6936 "specification part of a module");
6940 if (gfc_match_eos () == MATCH_YES
)
6947 return access_attr_decl (ST_PUBLIC
);
6951 /* Workhorse for gfc_match_parameter. */
6961 m
= gfc_match_symbol (&sym
, 0);
6963 gfc_error ("Expected variable name at %C in PARAMETER statement");
6968 if (gfc_match_char ('=') == MATCH_NO
)
6970 gfc_error ("Expected = sign in PARAMETER statement at %C");
6974 m
= gfc_match_init_expr (&init
);
6976 gfc_error ("Expected expression at %C in PARAMETER statement");
6980 if (sym
->ts
.type
== BT_UNKNOWN
6981 && !gfc_set_default_type (sym
, 1, NULL
))
6987 if (!gfc_check_assign_symbol (sym
, NULL
, init
)
6988 || !gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
))
6996 gfc_error ("Initializing already initialized variable at %C");
7001 t
= add_init_expr_to_sym (sym
->name
, &init
, &gfc_current_locus
);
7002 return (t
) ? MATCH_YES
: MATCH_ERROR
;
7005 gfc_free_expr (init
);
7010 /* Match a parameter statement, with the weird syntax that these have. */
7013 gfc_match_parameter (void)
7017 if (gfc_match_char ('(') == MATCH_NO
)
7026 if (gfc_match (" )%t") == MATCH_YES
)
7029 if (gfc_match_char (',') != MATCH_YES
)
7031 gfc_error ("Unexpected characters in PARAMETER statement at %C");
7041 /* Save statements have a special syntax. */
7044 gfc_match_save (void)
7046 char n
[GFC_MAX_SYMBOL_LEN
+1];
7051 if (gfc_match_eos () == MATCH_YES
)
7053 if (gfc_current_ns
->seen_save
)
7055 if (!gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
7056 "follows previous SAVE statement"))
7060 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
7064 if (gfc_current_ns
->save_all
)
7066 if (!gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
7067 "blanket SAVE statement"))
7075 m
= gfc_match_symbol (&sym
, 0);
7079 if (!gfc_add_save (&sym
->attr
, SAVE_EXPLICIT
, sym
->name
,
7080 &gfc_current_locus
))
7091 m
= gfc_match (" / %n /", &n
);
7092 if (m
== MATCH_ERROR
)
7097 c
= gfc_get_common (n
, 0);
7100 gfc_current_ns
->seen_save
= 1;
7103 if (gfc_match_eos () == MATCH_YES
)
7105 if (gfc_match_char (',') != MATCH_YES
)
7112 gfc_error ("Syntax error in SAVE statement at %C");
7118 gfc_match_value (void)
7123 /* This is not allowed within a BLOCK construct! */
7124 if (gfc_current_state () == COMP_BLOCK
)
7126 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
7130 if (!gfc_notify_std (GFC_STD_F2003
, "VALUE statement at %C"))
7133 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7138 if (gfc_match_eos () == MATCH_YES
)
7143 m
= gfc_match_symbol (&sym
, 0);
7147 if (!gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7159 if (gfc_match_eos () == MATCH_YES
)
7161 if (gfc_match_char (',') != MATCH_YES
)
7168 gfc_error ("Syntax error in VALUE statement at %C");
7174 gfc_match_volatile (void)
7179 if (!gfc_notify_std (GFC_STD_F2003
, "VOLATILE statement at %C"))
7182 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7187 if (gfc_match_eos () == MATCH_YES
)
7192 /* VOLATILE is special because it can be added to host-associated
7193 symbols locally. Except for coarrays. */
7194 m
= gfc_match_symbol (&sym
, 1);
7198 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
7199 for variable in a BLOCK which is defined outside of the BLOCK. */
7200 if (sym
->ns
!= gfc_current_ns
&& sym
->attr
.codimension
)
7202 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
7203 "%C, which is use-/host-associated", sym
->name
);
7206 if (!gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7218 if (gfc_match_eos () == MATCH_YES
)
7220 if (gfc_match_char (',') != MATCH_YES
)
7227 gfc_error ("Syntax error in VOLATILE statement at %C");
7233 gfc_match_asynchronous (void)
7238 if (!gfc_notify_std (GFC_STD_F2003
, "ASYNCHRONOUS statement at %C"))
7241 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7246 if (gfc_match_eos () == MATCH_YES
)
7251 /* ASYNCHRONOUS is special because it can be added to host-associated
7253 m
= gfc_match_symbol (&sym
, 1);
7257 if (!gfc_add_asynchronous (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7269 if (gfc_match_eos () == MATCH_YES
)
7271 if (gfc_match_char (',') != MATCH_YES
)
7278 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
7283 /* Match a module procedure statement. Note that we have to modify
7284 symbols in the parent's namespace because the current one was there
7285 to receive symbols that are in an interface's formal argument list. */
7288 gfc_match_modproc (void)
7290 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7294 gfc_namespace
*module_ns
;
7295 gfc_interface
*old_interface_head
, *interface
;
7297 if (gfc_state_stack
->state
!= COMP_INTERFACE
7298 || gfc_state_stack
->previous
== NULL
7299 || current_interface
.type
== INTERFACE_NAMELESS
7300 || current_interface
.type
== INTERFACE_ABSTRACT
)
7302 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
7307 module_ns
= gfc_current_ns
->parent
;
7308 for (; module_ns
; module_ns
= module_ns
->parent
)
7309 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
7310 || module_ns
->proc_name
->attr
.flavor
== FL_PROGRAM
7311 || (module_ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
7312 && !module_ns
->proc_name
->attr
.contained
))
7315 if (module_ns
== NULL
)
7318 /* Store the current state of the interface. We will need it if we
7319 end up with a syntax error and need to recover. */
7320 old_interface_head
= gfc_current_interface_head ();
7322 /* Check if the F2008 optional double colon appears. */
7323 gfc_gobble_whitespace ();
7324 old_locus
= gfc_current_locus
;
7325 if (gfc_match ("::") == MATCH_YES
)
7327 if (!gfc_notify_std (GFC_STD_F2008
, "double colon in "
7328 "MODULE PROCEDURE statement at %L", &old_locus
))
7332 gfc_current_locus
= old_locus
;
7337 old_locus
= gfc_current_locus
;
7339 m
= gfc_match_name (name
);
7345 /* Check for syntax error before starting to add symbols to the
7346 current namespace. */
7347 if (gfc_match_eos () == MATCH_YES
)
7350 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7353 /* Now we're sure the syntax is valid, we process this item
7355 if (gfc_get_symbol (name
, module_ns
, &sym
))
7358 if (sym
->attr
.intrinsic
)
7360 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
7361 "PROCEDURE", &old_locus
);
7365 if (sym
->attr
.proc
!= PROC_MODULE
7366 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
7369 if (!gfc_add_interface (sym
))
7372 sym
->attr
.mod_proc
= 1;
7373 sym
->declared_at
= old_locus
;
7382 /* Restore the previous state of the interface. */
7383 interface
= gfc_current_interface_head ();
7384 gfc_set_current_interface_head (old_interface_head
);
7386 /* Free the new interfaces. */
7387 while (interface
!= old_interface_head
)
7389 gfc_interface
*i
= interface
->next
;
7394 /* And issue a syntax error. */
7395 gfc_syntax_error (ST_MODULE_PROC
);
7400 /* Check a derived type that is being extended. */
7403 check_extended_derived_type (char *name
)
7405 gfc_symbol
*extended
;
7407 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
7409 gfc_error ("Ambiguous symbol in TYPE definition at %C");
7413 extended
= gfc_find_dt_in_generic (extended
);
7418 gfc_error ("Symbol '%s' at %C has not been previously defined", name
);
7422 if (extended
->attr
.flavor
!= FL_DERIVED
)
7424 gfc_error ("'%s' in EXTENDS expression at %C is not a "
7425 "derived type", name
);
7429 if (extended
->attr
.is_bind_c
)
7431 gfc_error ("'%s' cannot be extended at %C because it "
7432 "is BIND(C)", extended
->name
);
7436 if (extended
->attr
.sequence
)
7438 gfc_error ("'%s' cannot be extended at %C because it "
7439 "is a SEQUENCE type", extended
->name
);
7447 /* Match the optional attribute specifiers for a type declaration.
7448 Return MATCH_ERROR if an error is encountered in one of the handled
7449 attributes (public, private, bind(c)), MATCH_NO if what's found is
7450 not a handled attribute, and MATCH_YES otherwise. TODO: More error
7451 checking on attribute conflicts needs to be done. */
7454 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
7456 /* See if the derived type is marked as private. */
7457 if (gfc_match (" , private") == MATCH_YES
)
7459 if (gfc_current_state () != COMP_MODULE
)
7461 gfc_error ("Derived type at %C can only be PRIVATE in the "
7462 "specification part of a module");
7466 if (!gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
))
7469 else if (gfc_match (" , public") == MATCH_YES
)
7471 if (gfc_current_state () != COMP_MODULE
)
7473 gfc_error ("Derived type at %C can only be PUBLIC in the "
7474 "specification part of a module");
7478 if (!gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
))
7481 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
7483 /* If the type is defined to be bind(c) it then needs to make
7484 sure that all fields are interoperable. This will
7485 need to be a semantic check on the finished derived type.
7486 See 15.2.3 (lines 9-12) of F2003 draft. */
7487 if (!gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0))
7490 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
7492 else if (gfc_match (" , abstract") == MATCH_YES
)
7494 if (!gfc_notify_std (GFC_STD_F2003
, "ABSTRACT type at %C"))
7497 if (!gfc_add_abstract (attr
, &gfc_current_locus
))
7500 else if (name
&& gfc_match (" , extends ( %n )", name
) == MATCH_YES
)
7502 if (!gfc_add_extension (attr
, &gfc_current_locus
))
7508 /* If we get here, something matched. */
7513 /* Match the beginning of a derived type declaration. If a type name
7514 was the result of a function, then it is possible to have a symbol
7515 already to be known as a derived type yet have no components. */
7518 gfc_match_derived_decl (void)
7520 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7521 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
7522 symbol_attribute attr
;
7523 gfc_symbol
*sym
, *gensym
;
7524 gfc_symbol
*extended
;
7526 match is_type_attr_spec
= MATCH_NO
;
7527 bool seen_attr
= false;
7528 gfc_interface
*intr
= NULL
, *head
;
7530 if (gfc_current_state () == COMP_DERIVED
)
7535 gfc_clear_attr (&attr
);
7540 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
7541 if (is_type_attr_spec
== MATCH_ERROR
)
7543 if (is_type_attr_spec
== MATCH_YES
)
7545 } while (is_type_attr_spec
== MATCH_YES
);
7547 /* Deal with derived type extensions. The extension attribute has
7548 been added to 'attr' but now the parent type must be found and
7551 extended
= check_extended_derived_type (parent
);
7553 if (parent
[0] && !extended
)
7556 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
7558 gfc_error ("Expected :: in TYPE definition at %C");
7562 m
= gfc_match (" %n%t", name
);
7566 /* Make sure the name is not the name of an intrinsic type. */
7567 if (gfc_is_intrinsic_typename (name
))
7569 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7574 if (gfc_get_symbol (name
, NULL
, &gensym
))
7577 if (!gensym
->attr
.generic
&& gensym
->ts
.type
!= BT_UNKNOWN
)
7579 gfc_error ("Derived type name '%s' at %C already has a basic type "
7580 "of %s", gensym
->name
, gfc_typename (&gensym
->ts
));
7584 if (!gensym
->attr
.generic
7585 && !gfc_add_generic (&gensym
->attr
, gensym
->name
, NULL
))
7588 if (!gensym
->attr
.function
7589 && !gfc_add_function (&gensym
->attr
, gensym
->name
, NULL
))
7592 sym
= gfc_find_dt_in_generic (gensym
);
7594 if (sym
&& (sym
->components
!= NULL
|| sym
->attr
.zero_comp
))
7596 gfc_error ("Derived type definition of '%s' at %C has already been "
7597 "defined", sym
->name
);
7603 /* Use upper case to save the actual derived-type symbol. */
7604 gfc_get_symbol (gfc_get_string ("%c%s",
7605 (char) TOUPPER ((unsigned char) gensym
->name
[0]),
7606 &gensym
->name
[1]), NULL
, &sym
);
7607 sym
->name
= gfc_get_string (gensym
->name
);
7608 head
= gensym
->generic
;
7609 intr
= gfc_get_interface ();
7611 intr
->where
= gfc_current_locus
;
7612 intr
->sym
->declared_at
= gfc_current_locus
;
7614 gensym
->generic
= intr
;
7615 gensym
->attr
.if_source
= IFSRC_DECL
;
7618 /* The symbol may already have the derived attribute without the
7619 components. The ways this can happen is via a function
7620 definition, an INTRINSIC statement or a subtype in another
7621 derived type that is a pointer. The first part of the AND clause
7622 is true if the symbol is not the return value of a function. */
7623 if (sym
->attr
.flavor
!= FL_DERIVED
7624 && !gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
))
7627 if (attr
.access
!= ACCESS_UNKNOWN
7628 && !gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
))
7630 else if (sym
->attr
.access
== ACCESS_UNKNOWN
7631 && gensym
->attr
.access
!= ACCESS_UNKNOWN
7632 && !gfc_add_access (&sym
->attr
, gensym
->attr
.access
,
7636 if (sym
->attr
.access
!= ACCESS_UNKNOWN
7637 && gensym
->attr
.access
== ACCESS_UNKNOWN
)
7638 gensym
->attr
.access
= sym
->attr
.access
;
7640 /* See if the derived type was labeled as bind(c). */
7641 if (attr
.is_bind_c
!= 0)
7642 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
7644 /* Construct the f2k_derived namespace if it is not yet there. */
7645 if (!sym
->f2k_derived
)
7646 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7648 if (extended
&& !sym
->components
)
7653 /* Add the extended derived type as the first component. */
7654 gfc_add_component (sym
, parent
, &p
);
7656 gfc_set_sym_referenced (extended
);
7658 p
->ts
.type
= BT_DERIVED
;
7659 p
->ts
.u
.derived
= extended
;
7660 p
->initializer
= gfc_default_initializer (&p
->ts
);
7662 /* Set extension level. */
7663 if (extended
->attr
.extension
== 255)
7665 /* Since the extension field is 8 bit wide, we can only have
7666 up to 255 extension levels. */
7667 gfc_error ("Maximum extension level reached with type '%s' at %L",
7668 extended
->name
, &extended
->declared_at
);
7671 sym
->attr
.extension
= extended
->attr
.extension
+ 1;
7673 /* Provide the links between the extended type and its extension. */
7674 if (!extended
->f2k_derived
)
7675 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7676 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
7680 if (!sym
->hash_value
)
7681 /* Set the hash for the compound name for this type. */
7682 sym
->hash_value
= gfc_hash_value (sym
);
7684 /* Take over the ABSTRACT attribute. */
7685 sym
->attr
.abstract
= attr
.abstract
;
7687 gfc_new_block
= sym
;
7693 /* Cray Pointees can be declared as:
7694 pointer (ipt, a (n,m,...,*)) */
7697 gfc_mod_pointee_as (gfc_array_spec
*as
)
7699 as
->cray_pointee
= true; /* This will be useful to know later. */
7700 if (as
->type
== AS_ASSUMED_SIZE
)
7701 as
->cp_was_assumed
= true;
7702 else if (as
->type
== AS_ASSUMED_SHAPE
)
7704 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7711 /* Match the enum definition statement, here we are trying to match
7712 the first line of enum definition statement.
7713 Returns MATCH_YES if match is found. */
7716 gfc_match_enum (void)
7720 m
= gfc_match_eos ();
7724 if (!gfc_notify_std (GFC_STD_F2003
, "ENUM and ENUMERATOR at %C"))
7731 /* Returns an initializer whose value is one higher than the value of the
7732 LAST_INITIALIZER argument. If the argument is NULL, the
7733 initializers value will be set to zero. The initializer's kind
7734 will be set to gfc_c_int_kind.
7736 If -fshort-enums is given, the appropriate kind will be selected
7737 later after all enumerators have been parsed. A warning is issued
7738 here if an initializer exceeds gfc_c_int_kind. */
7741 enum_initializer (gfc_expr
*last_initializer
, locus where
)
7744 result
= gfc_get_constant_expr (BT_INTEGER
, gfc_c_int_kind
, &where
);
7746 mpz_init (result
->value
.integer
);
7748 if (last_initializer
!= NULL
)
7750 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
7751 result
->where
= last_initializer
->where
;
7753 if (gfc_check_integer_range (result
->value
.integer
,
7754 gfc_c_int_kind
) != ARITH_OK
)
7756 gfc_error ("Enumerator exceeds the C integer type at %C");
7762 /* Control comes here, if it's the very first enumerator and no
7763 initializer has been given. It will be initialized to zero. */
7764 mpz_set_si (result
->value
.integer
, 0);
7771 /* Match a variable name with an optional initializer. When this
7772 subroutine is called, a variable is expected to be parsed next.
7773 Depending on what is happening at the moment, updates either the
7774 symbol table or the current interface. */
7777 enumerator_decl (void)
7779 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7780 gfc_expr
*initializer
;
7781 gfc_array_spec
*as
= NULL
;
7789 old_locus
= gfc_current_locus
;
7791 /* When we get here, we've just matched a list of attributes and
7792 maybe a type and a double colon. The next thing we expect to see
7793 is the name of the symbol. */
7794 m
= gfc_match_name (name
);
7798 var_locus
= gfc_current_locus
;
7800 /* OK, we've successfully matched the declaration. Now put the
7801 symbol in the current namespace. If we fail to create the symbol,
7803 if (!build_sym (name
, NULL
, false, &as
, &var_locus
))
7809 /* The double colon must be present in order to have initializers.
7810 Otherwise the statement is ambiguous with an assignment statement. */
7813 if (gfc_match_char ('=') == MATCH_YES
)
7815 m
= gfc_match_init_expr (&initializer
);
7818 gfc_error ("Expected an initialization expression at %C");
7827 /* If we do not have an initializer, the initialization value of the
7828 previous enumerator (stored in last_initializer) is incremented
7829 by 1 and is used to initialize the current enumerator. */
7830 if (initializer
== NULL
)
7831 initializer
= enum_initializer (last_initializer
, old_locus
);
7833 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
7835 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7841 /* Store this current initializer, for the next enumerator variable
7842 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7843 use last_initializer below. */
7844 last_initializer
= initializer
;
7845 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
7847 /* Maintain enumerator history. */
7848 gfc_find_symbol (name
, NULL
, 0, &sym
);
7849 create_enum_history (sym
, last_initializer
);
7851 return (t
) ? MATCH_YES
: MATCH_ERROR
;
7854 /* Free stuff up and return. */
7855 gfc_free_expr (initializer
);
7861 /* Match the enumerator definition statement. */
7864 gfc_match_enumerator_def (void)
7869 gfc_clear_ts (¤t_ts
);
7871 m
= gfc_match (" enumerator");
7875 m
= gfc_match (" :: ");
7876 if (m
== MATCH_ERROR
)
7879 colon_seen
= (m
== MATCH_YES
);
7881 if (gfc_current_state () != COMP_ENUM
)
7883 gfc_error ("ENUM definition statement expected before %C");
7884 gfc_free_enum_history ();
7888 (¤t_ts
)->type
= BT_INTEGER
;
7889 (¤t_ts
)->kind
= gfc_c_int_kind
;
7891 gfc_clear_attr (¤t_attr
);
7892 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
7901 m
= enumerator_decl ();
7902 if (m
== MATCH_ERROR
)
7904 gfc_free_enum_history ();
7910 if (gfc_match_eos () == MATCH_YES
)
7912 if (gfc_match_char (',') != MATCH_YES
)
7916 if (gfc_current_state () == COMP_ENUM
)
7918 gfc_free_enum_history ();
7919 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7924 gfc_free_array_spec (current_as
);
7931 /* Match binding attributes. */
7934 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
7936 bool found_passing
= false;
7937 bool seen_ptr
= false;
7938 match m
= MATCH_YES
;
7940 /* Initialize to defaults. Do so even before the MATCH_NO check so that in
7941 this case the defaults are in there. */
7942 ba
->access
= ACCESS_UNKNOWN
;
7943 ba
->pass_arg
= NULL
;
7944 ba
->pass_arg_num
= 0;
7946 ba
->non_overridable
= 0;
7950 /* If we find a comma, we believe there are binding attributes. */
7951 m
= gfc_match_char (',');
7957 /* Access specifier. */
7959 m
= gfc_match (" public");
7960 if (m
== MATCH_ERROR
)
7964 if (ba
->access
!= ACCESS_UNKNOWN
)
7966 gfc_error ("Duplicate access-specifier at %C");
7970 ba
->access
= ACCESS_PUBLIC
;
7974 m
= gfc_match (" private");
7975 if (m
== MATCH_ERROR
)
7979 if (ba
->access
!= ACCESS_UNKNOWN
)
7981 gfc_error ("Duplicate access-specifier at %C");
7985 ba
->access
= ACCESS_PRIVATE
;
7989 /* If inside GENERIC, the following is not allowed. */
7994 m
= gfc_match (" nopass");
7995 if (m
== MATCH_ERROR
)
8001 gfc_error ("Binding attributes already specify passing,"
8002 " illegal NOPASS at %C");
8006 found_passing
= true;
8011 /* PASS possibly including argument. */
8012 m
= gfc_match (" pass");
8013 if (m
== MATCH_ERROR
)
8017 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
8021 gfc_error ("Binding attributes already specify passing,"
8022 " illegal PASS at %C");
8026 m
= gfc_match (" ( %n )", arg
);
8027 if (m
== MATCH_ERROR
)
8030 ba
->pass_arg
= gfc_get_string (arg
);
8031 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
8033 found_passing
= true;
8041 m
= gfc_match (" pointer");
8042 if (m
== MATCH_ERROR
)
8048 gfc_error ("Duplicate POINTER attribute at %C");
8058 /* NON_OVERRIDABLE flag. */
8059 m
= gfc_match (" non_overridable");
8060 if (m
== MATCH_ERROR
)
8064 if (ba
->non_overridable
)
8066 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
8070 ba
->non_overridable
= 1;
8074 /* DEFERRED flag. */
8075 m
= gfc_match (" deferred");
8076 if (m
== MATCH_ERROR
)
8082 gfc_error ("Duplicate DEFERRED at %C");
8093 /* Nothing matching found. */
8095 gfc_error ("Expected access-specifier at %C");
8097 gfc_error ("Expected binding attribute at %C");
8100 while (gfc_match_char (',') == MATCH_YES
);
8102 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
8103 if (ba
->non_overridable
&& ba
->deferred
)
8105 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
8112 if (ba
->access
== ACCESS_UNKNOWN
)
8113 ba
->access
= gfc_typebound_default_access
;
8115 if (ppc
&& !seen_ptr
)
8117 gfc_error ("POINTER attribute is required for procedure pointer component"
8129 /* Match a PROCEDURE specific binding inside a derived type. */
8132 match_procedure_in_type (void)
8134 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8135 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
8136 char* target
= NULL
, *ifc
= NULL
;
8137 gfc_typebound_proc tb
;
8146 /* Check current state. */
8147 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
8148 block
= gfc_state_stack
->previous
->sym
;
8151 /* Try to match PROCEDURE(interface). */
8152 if (gfc_match (" (") == MATCH_YES
)
8154 m
= gfc_match_name (target_buf
);
8155 if (m
== MATCH_ERROR
)
8159 gfc_error ("Interface-name expected after '(' at %C");
8163 if (gfc_match (" )") != MATCH_YES
)
8165 gfc_error ("')' expected at %C");
8172 /* Construct the data structure. */
8173 memset (&tb
, 0, sizeof (tb
));
8174 tb
.where
= gfc_current_locus
;
8176 /* Match binding attributes. */
8177 m
= match_binding_attributes (&tb
, false, false);
8178 if (m
== MATCH_ERROR
)
8180 seen_attrs
= (m
== MATCH_YES
);
8182 /* Check that attribute DEFERRED is given if an interface is specified. */
8183 if (tb
.deferred
&& !ifc
)
8185 gfc_error ("Interface must be specified for DEFERRED binding at %C");
8188 if (ifc
&& !tb
.deferred
)
8190 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
8194 /* Match the colons. */
8195 m
= gfc_match (" ::");
8196 if (m
== MATCH_ERROR
)
8198 seen_colons
= (m
== MATCH_YES
);
8199 if (seen_attrs
&& !seen_colons
)
8201 gfc_error ("Expected '::' after binding-attributes at %C");
8205 /* Match the binding names. */
8208 m
= gfc_match_name (name
);
8209 if (m
== MATCH_ERROR
)
8213 gfc_error ("Expected binding name at %C");
8217 if (num
>1 && !gfc_notify_std (GFC_STD_F2008
, "PROCEDURE list at %C"))
8220 /* Try to match the '=> target', if it's there. */
8222 m
= gfc_match (" =>");
8223 if (m
== MATCH_ERROR
)
8229 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
8235 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
8240 m
= gfc_match_name (target_buf
);
8241 if (m
== MATCH_ERROR
)
8245 gfc_error ("Expected binding target after '=>' at %C");
8248 target
= target_buf
;
8251 /* If no target was found, it has the same name as the binding. */
8255 /* Get the namespace to insert the symbols into. */
8256 ns
= block
->f2k_derived
;
8259 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
8260 if (tb
.deferred
&& !block
->attr
.abstract
)
8262 gfc_error ("Type '%s' containing DEFERRED binding at %C "
8263 "is not ABSTRACT", block
->name
);
8267 /* See if we already have a binding with this name in the symtree which
8268 would be an error. If a GENERIC already targeted this binding, it may
8269 be already there but then typebound is still NULL. */
8270 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
8271 if (stree
&& stree
->n
.tb
)
8273 gfc_error ("There is already a procedure with binding name '%s' for "
8274 "the derived type '%s' at %C", name
, block
->name
);
8278 /* Insert it and set attributes. */
8282 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
8285 stree
->n
.tb
= gfc_get_typebound_proc (&tb
);
8287 if (gfc_get_sym_tree (target
, gfc_current_ns
, &stree
->n
.tb
->u
.specific
,
8290 gfc_set_sym_referenced (stree
->n
.tb
->u
.specific
->n
.sym
);
8292 if (gfc_match_eos () == MATCH_YES
)
8294 if (gfc_match_char (',') != MATCH_YES
)
8299 gfc_error ("Syntax error in PROCEDURE statement at %C");
8304 /* Match a GENERIC procedure binding inside a derived type. */
8307 gfc_match_generic (void)
8309 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8310 char bind_name
[GFC_MAX_SYMBOL_LEN
+ 16]; /* Allow space for OPERATOR(...). */
8312 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
8313 gfc_typebound_proc
* tb
;
8315 interface_type op_type
;
8316 gfc_intrinsic_op op
;
8319 /* Check current state. */
8320 if (gfc_current_state () == COMP_DERIVED
)
8322 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
8325 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
8327 block
= gfc_state_stack
->previous
->sym
;
8328 ns
= block
->f2k_derived
;
8329 gcc_assert (block
&& ns
);
8331 memset (&tbattr
, 0, sizeof (tbattr
));
8332 tbattr
.where
= gfc_current_locus
;
8334 /* See if we get an access-specifier. */
8335 m
= match_binding_attributes (&tbattr
, true, false);
8336 if (m
== MATCH_ERROR
)
8339 /* Now the colons, those are required. */
8340 if (gfc_match (" ::") != MATCH_YES
)
8342 gfc_error ("Expected '::' at %C");
8346 /* Match the binding name; depending on type (operator / generic) format
8347 it for future error messages into bind_name. */
8349 m
= gfc_match_generic_spec (&op_type
, name
, &op
);
8350 if (m
== MATCH_ERROR
)
8354 gfc_error ("Expected generic name or operator descriptor at %C");
8360 case INTERFACE_GENERIC
:
8361 snprintf (bind_name
, sizeof (bind_name
), "%s", name
);
8364 case INTERFACE_USER_OP
:
8365 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(.%s.)", name
);
8368 case INTERFACE_INTRINSIC_OP
:
8369 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(%s)",
8370 gfc_op2string (op
));
8377 /* Match the required =>. */
8378 if (gfc_match (" =>") != MATCH_YES
)
8380 gfc_error ("Expected '=>' at %C");
8384 /* Try to find existing GENERIC binding with this name / for this operator;
8385 if there is something, check that it is another GENERIC and then extend
8386 it rather than building a new node. Otherwise, create it and put it
8387 at the right position. */
8391 case INTERFACE_USER_OP
:
8392 case INTERFACE_GENERIC
:
8394 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8397 st
= gfc_find_symtree (is_op
? ns
->tb_uop_root
: ns
->tb_sym_root
, name
);
8409 case INTERFACE_INTRINSIC_OP
:
8419 if (!tb
->is_generic
)
8421 gcc_assert (op_type
== INTERFACE_GENERIC
);
8422 gfc_error ("There's already a non-generic procedure with binding name"
8423 " '%s' for the derived type '%s' at %C",
8424 bind_name
, block
->name
);
8428 if (tb
->access
!= tbattr
.access
)
8430 gfc_error ("Binding at %C must have the same access as already"
8431 " defined binding '%s'", bind_name
);
8437 tb
= gfc_get_typebound_proc (NULL
);
8438 tb
->where
= gfc_current_locus
;
8439 tb
->access
= tbattr
.access
;
8441 tb
->u
.generic
= NULL
;
8445 case INTERFACE_GENERIC
:
8446 case INTERFACE_USER_OP
:
8448 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8451 st
= gfc_new_symtree (is_op
? &ns
->tb_uop_root
: &ns
->tb_sym_root
,
8459 case INTERFACE_INTRINSIC_OP
:
8468 /* Now, match all following names as specific targets. */
8471 gfc_symtree
* target_st
;
8472 gfc_tbp_generic
* target
;
8474 m
= gfc_match_name (name
);
8475 if (m
== MATCH_ERROR
)
8479 gfc_error ("Expected specific binding name at %C");
8483 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
8485 /* See if this is a duplicate specification. */
8486 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
8487 if (target_st
== target
->specific_st
)
8489 gfc_error ("'%s' already defined as specific binding for the"
8490 " generic '%s' at %C", name
, bind_name
);
8494 target
= gfc_get_tbp_generic ();
8495 target
->specific_st
= target_st
;
8496 target
->specific
= NULL
;
8497 target
->next
= tb
->u
.generic
;
8498 target
->is_operator
= ((op_type
== INTERFACE_USER_OP
)
8499 || (op_type
== INTERFACE_INTRINSIC_OP
));
8500 tb
->u
.generic
= target
;
8502 while (gfc_match (" ,") == MATCH_YES
);
8504 /* Here should be the end. */
8505 if (gfc_match_eos () != MATCH_YES
)
8507 gfc_error ("Junk after GENERIC binding at %C");
8518 /* Match a FINAL declaration inside a derived type. */
8521 gfc_match_final_decl (void)
8523 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8526 gfc_namespace
* module_ns
;
8530 if (gfc_current_form
== FORM_FREE
)
8532 char c
= gfc_peek_ascii_char ();
8533 if (!gfc_is_whitespace (c
) && c
!= ':')
8537 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
8539 if (gfc_current_form
== FORM_FIXED
)
8542 gfc_error ("FINAL declaration at %C must be inside a derived type "
8543 "CONTAINS section");
8547 block
= gfc_state_stack
->previous
->sym
;
8550 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
8551 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
8553 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8554 " specification part of a MODULE");
8558 module_ns
= gfc_current_ns
;
8559 gcc_assert (module_ns
);
8560 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
8562 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8563 if (gfc_match (" ::") == MATCH_ERROR
)
8566 /* Match the sequence of procedure names. */
8573 if (first
&& gfc_match_eos () == MATCH_YES
)
8575 gfc_error ("Empty FINAL at %C");
8579 m
= gfc_match_name (name
);
8582 gfc_error ("Expected module procedure name at %C");
8585 else if (m
!= MATCH_YES
)
8588 if (gfc_match_eos () == MATCH_YES
)
8590 if (!last
&& gfc_match_char (',') != MATCH_YES
)
8592 gfc_error ("Expected ',' at %C");
8596 if (gfc_get_symbol (name
, module_ns
, &sym
))
8598 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
8602 /* Mark the symbol as module procedure. */
8603 if (sym
->attr
.proc
!= PROC_MODULE
8604 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
8607 /* Check if we already have this symbol in the list, this is an error. */
8608 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
8609 if (f
->proc_sym
== sym
)
8611 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8616 /* Add this symbol to the list of finalizers. */
8617 gcc_assert (block
->f2k_derived
);
8619 f
= XCNEW (gfc_finalizer
);
8621 f
->proc_tree
= NULL
;
8622 f
->where
= gfc_current_locus
;
8623 f
->next
= block
->f2k_derived
->finalizers
;
8624 block
->f2k_derived
->finalizers
= f
;
8634 const ext_attr_t ext_attr_list
[] = {
8635 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
8636 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
8637 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
8638 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
8639 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
8640 { "no_arg_check", EXT_ATTR_NO_ARG_CHECK
, NULL
},
8641 { NULL
, EXT_ATTR_LAST
, NULL
}
8644 /* Match a !GCC$ ATTRIBUTES statement of the form:
8645 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8646 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8648 TODO: We should support all GCC attributes using the same syntax for
8649 the attribute list, i.e. the list in C
8650 __attributes(( attribute-list ))
8652 !GCC$ ATTRIBUTES attribute-list ::
8653 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8656 As there is absolutely no risk of confusion, we should never return
8659 gfc_match_gcc_attributes (void)
8661 symbol_attribute attr
;
8662 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8667 gfc_clear_attr (&attr
);
8672 if (gfc_match_name (name
) != MATCH_YES
)
8675 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
8676 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
8679 if (id
== EXT_ATTR_LAST
)
8681 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8685 if (!gfc_add_ext_attribute (&attr
, (ext_attr_id_t
)id
, &gfc_current_locus
))
8688 gfc_gobble_whitespace ();
8689 ch
= gfc_next_ascii_char ();
8692 /* This is the successful exit condition for the loop. */
8693 if (gfc_next_ascii_char () == ':')
8703 if (gfc_match_eos () == MATCH_YES
)
8708 m
= gfc_match_name (name
);
8712 if (find_special (name
, &sym
, true))
8715 sym
->attr
.ext_attr
|= attr
.ext_attr
;
8717 if (gfc_match_eos () == MATCH_YES
)
8720 if (gfc_match_char (',') != MATCH_YES
)
8727 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");