1 /* Declaration statement matcher
2 Copyright (C) 2002-2014 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");
513 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
515 /* Mark the variable as having appeared in a data statement. */
516 if (!gfc_add_data (&sym
->attr
, sym
->name
, &sym
->declared_at
))
522 /* Chain in namespace list of DATA initializers. */
523 newdata
->next
= gfc_current_ns
->data
;
524 gfc_current_ns
->data
= newdata
;
530 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
531 we are matching a DATA statement and are therefore issuing an error
532 if we encounter something unexpected, if not, we're trying to match
533 an old-style initialization expression of the form INTEGER I /2/. */
536 gfc_match_data (void)
541 set_in_match_data (true);
545 new_data
= gfc_get_data ();
546 new_data
->where
= gfc_current_locus
;
548 m
= top_var_list (new_data
);
552 m
= top_val_list (new_data
);
556 new_data
->next
= gfc_current_ns
->data
;
557 gfc_current_ns
->data
= new_data
;
559 if (gfc_match_eos () == MATCH_YES
)
562 gfc_match_char (','); /* Optional comma */
565 set_in_match_data (false);
569 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
572 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
577 set_in_match_data (false);
578 gfc_free_data (new_data
);
583 /************************ Declaration statements *********************/
586 /* Auxiliary function to merge DIMENSION and CODIMENSION array specs. */
589 merge_array_spec (gfc_array_spec
*from
, gfc_array_spec
*to
, bool copy
)
593 if ((from
->type
== AS_ASSUMED_RANK
&& to
->corank
)
594 || (to
->type
== AS_ASSUMED_RANK
&& from
->corank
))
596 gfc_error ("The assumed-rank array at %C shall not have a codimension");
600 if (to
->rank
== 0 && from
->rank
> 0)
602 to
->rank
= from
->rank
;
603 to
->type
= from
->type
;
604 to
->cray_pointee
= from
->cray_pointee
;
605 to
->cp_was_assumed
= from
->cp_was_assumed
;
607 for (i
= 0; i
< to
->corank
; i
++)
609 to
->lower
[from
->rank
+ i
] = to
->lower
[i
];
610 to
->upper
[from
->rank
+ i
] = to
->upper
[i
];
612 for (i
= 0; i
< from
->rank
; i
++)
616 to
->lower
[i
] = gfc_copy_expr (from
->lower
[i
]);
617 to
->upper
[i
] = gfc_copy_expr (from
->upper
[i
]);
621 to
->lower
[i
] = from
->lower
[i
];
622 to
->upper
[i
] = from
->upper
[i
];
626 else if (to
->corank
== 0 && from
->corank
> 0)
628 to
->corank
= from
->corank
;
629 to
->cotype
= from
->cotype
;
631 for (i
= 0; i
< from
->corank
; i
++)
635 to
->lower
[to
->rank
+ i
] = gfc_copy_expr (from
->lower
[i
]);
636 to
->upper
[to
->rank
+ i
] = gfc_copy_expr (from
->upper
[i
]);
640 to
->lower
[to
->rank
+ i
] = from
->lower
[i
];
641 to
->upper
[to
->rank
+ i
] = from
->upper
[i
];
650 /* Match an intent specification. Since this can only happen after an
651 INTENT word, a legal intent-spec must follow. */
654 match_intent_spec (void)
657 if (gfc_match (" ( in out )") == MATCH_YES
)
659 if (gfc_match (" ( in )") == MATCH_YES
)
661 if (gfc_match (" ( out )") == MATCH_YES
)
664 gfc_error ("Bad INTENT specification at %C");
665 return INTENT_UNKNOWN
;
669 /* Matches a character length specification, which is either a
670 specification expression, '*', or ':'. */
673 char_len_param_value (gfc_expr
**expr
, bool *deferred
)
680 if (gfc_match_char ('*') == MATCH_YES
)
683 if (gfc_match_char (':') == MATCH_YES
)
685 if (!gfc_notify_std (GFC_STD_F2003
, "deferred type "
694 m
= gfc_match_expr (expr
);
697 && !gfc_expr_check_typed (*expr
, gfc_current_ns
, false))
700 if (m
== MATCH_YES
&& (*expr
)->expr_type
== EXPR_FUNCTION
)
702 if ((*expr
)->value
.function
.actual
703 && (*expr
)->value
.function
.actual
->expr
->symtree
)
706 e
= (*expr
)->value
.function
.actual
->expr
;
707 if (e
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
708 && e
->expr_type
== EXPR_VARIABLE
)
710 if (e
->symtree
->n
.sym
->ts
.type
== BT_UNKNOWN
)
712 if (e
->symtree
->n
.sym
->ts
.type
== BT_CHARACTER
713 && e
->symtree
->n
.sym
->ts
.u
.cl
714 && e
->symtree
->n
.sym
->ts
.u
.cl
->length
->ts
.type
== BT_UNKNOWN
)
722 gfc_error ("Conflict in attributes of function argument at %C");
727 /* A character length is a '*' followed by a literal integer or a
728 char_len_param_value in parenthesis. */
731 match_char_length (gfc_expr
**expr
, bool *deferred
, bool obsolescent_check
)
737 m
= gfc_match_char ('*');
741 m
= gfc_match_small_literal_int (&length
, NULL
);
742 if (m
== MATCH_ERROR
)
747 if (obsolescent_check
748 && !gfc_notify_std (GFC_STD_F95_OBS
, "Old-style character length at %C"))
750 *expr
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, length
);
754 if (gfc_match_char ('(') == MATCH_NO
)
757 m
= char_len_param_value (expr
, deferred
);
758 if (m
!= MATCH_YES
&& gfc_matching_function
)
764 if (m
== MATCH_ERROR
)
769 if (gfc_match_char (')') == MATCH_NO
)
771 gfc_free_expr (*expr
);
779 gfc_error ("Syntax error in character length specification at %C");
784 /* Special subroutine for finding a symbol. Check if the name is found
785 in the current name space. If not, and we're compiling a function or
786 subroutine and the parent compilation unit is an interface, then check
787 to see if the name we've been given is the name of the interface
788 (located in another namespace). */
791 find_special (const char *name
, gfc_symbol
**result
, bool allow_subroutine
)
797 i
= gfc_get_sym_tree (name
, NULL
, &st
, allow_subroutine
);
800 *result
= st
? st
->n
.sym
: NULL
;
804 if (gfc_current_state () != COMP_SUBROUTINE
805 && gfc_current_state () != COMP_FUNCTION
)
808 s
= gfc_state_stack
->previous
;
812 if (s
->state
!= COMP_INTERFACE
)
815 goto end
; /* Nameless interface. */
817 if (strcmp (name
, s
->sym
->name
) == 0)
828 /* Special subroutine for getting a symbol node associated with a
829 procedure name, used in SUBROUTINE and FUNCTION statements. The
830 symbol is created in the parent using with symtree node in the
831 child unit pointing to the symbol. If the current namespace has no
832 parent, then the symbol is just created in the current unit. */
835 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
841 /* Module functions have to be left in their own namespace because
842 they have potentially (almost certainly!) already been referenced.
843 In this sense, they are rather like external functions. This is
844 fixed up in resolve.c(resolve_entries), where the symbol name-
845 space is set to point to the master function, so that the fake
846 result mechanism can work. */
847 if (module_fcn_entry
)
849 /* Present if entry is declared to be a module procedure. */
850 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
853 rc
= gfc_get_symbol (name
, NULL
, result
);
854 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
855 && (*result
)->ts
.type
== BT_UNKNOWN
856 && sym
->attr
.flavor
== FL_UNKNOWN
)
857 /* Pick up the typespec for the entry, if declared in the function
858 body. Note that this symbol is FL_UNKNOWN because it will
859 only have appeared in a type declaration. The local symtree
860 is set to point to the module symbol and a unique symtree
861 to the local version. This latter ensures a correct clearing
864 /* If the ENTRY proceeds its specification, we need to ensure
865 that this does not raise a "has no IMPLICIT type" error. */
866 if (sym
->ts
.type
== BT_UNKNOWN
)
867 sym
->attr
.untyped
= 1;
869 (*result
)->ts
= sym
->ts
;
871 /* Put the symbol in the procedure namespace so that, should
872 the ENTRY precede its specification, the specification
874 (*result
)->ns
= gfc_current_ns
;
876 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
878 st
= gfc_get_unique_symtree (gfc_current_ns
);
883 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
890 if (sym
&& !sym
->gfc_new
&& gfc_current_state () != COMP_INTERFACE
)
892 /* Trap another encompassed procedure with the same name. All
893 these conditions are necessary to avoid picking up an entry
894 whose name clashes with that of the encompassing procedure;
895 this is handled using gsymbols to register unique,globally
897 if (sym
->attr
.flavor
!= 0
898 && sym
->attr
.proc
!= 0
899 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
900 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
901 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
902 name
, &sym
->declared_at
);
904 /* Trap a procedure with a name the same as interface in the
905 encompassing scope. */
906 if (sym
->attr
.generic
!= 0
907 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
908 && !sym
->attr
.mod_proc
)
909 gfc_error_now ("Name '%s' at %C is already defined"
910 " as a generic interface at %L",
911 name
, &sym
->declared_at
);
913 /* Trap declarations of attributes in encompassing scope. The
914 signature for this is that ts.kind is set. Legitimate
915 references only set ts.type. */
916 if (sym
->ts
.kind
!= 0
917 && !sym
->attr
.implicit_type
918 && sym
->attr
.proc
== 0
919 && gfc_current_ns
->parent
!= NULL
920 && sym
->attr
.access
== 0
921 && !module_fcn_entry
)
922 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
923 "and must not have attributes declared at %L",
924 name
, &sym
->declared_at
);
927 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
930 /* Module function entries will already have a symtree in
931 the current namespace but will need one at module level. */
932 if (module_fcn_entry
)
934 /* Present if entry is declared to be a module procedure. */
935 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
937 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
940 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
945 /* See if the procedure should be a module procedure. */
947 if (((sym
->ns
->proc_name
!= NULL
948 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
949 && sym
->attr
.proc
!= PROC_MODULE
)
950 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
951 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
958 /* Verify that the given symbol representing a parameter is C
959 interoperable, by checking to see if it was marked as such after
960 its declaration. If the given symbol is not interoperable, a
961 warning is reported, thus removing the need to return the status to
962 the calling function. The standard does not require the user use
963 one of the iso_c_binding named constants to declare an
964 interoperable parameter, but we can't be sure if the param is C
965 interop or not if the user doesn't. For example, integer(4) may be
966 legal Fortran, but doesn't have meaning in C. It may interop with
967 a number of the C types, which causes a problem because the
968 compiler can't know which one. This code is almost certainly not
969 portable, and the user will get what they deserve if the C type
970 across platforms isn't always interoperable with integer(4). If
971 the user had used something like integer(c_int) or integer(c_long),
972 the compiler could have automatically handled the varying sizes
976 gfc_verify_c_interop_param (gfc_symbol
*sym
)
978 int is_c_interop
= 0;
981 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
982 Don't repeat the checks here. */
983 if (sym
->attr
.implicit_type
)
986 /* For subroutines or functions that are passed to a BIND(C) procedure,
987 they're interoperable if they're BIND(C) and their params are all
989 if (sym
->attr
.flavor
== FL_PROCEDURE
)
991 if (sym
->attr
.is_bind_c
== 0)
993 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
994 "attribute to be C interoperable", sym
->name
,
995 &(sym
->declared_at
));
1001 if (sym
->attr
.is_c_interop
== 1)
1002 /* We've already checked this procedure; don't check it again. */
1005 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
1010 /* See if we've stored a reference to a procedure that owns sym. */
1011 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
1013 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
1015 is_c_interop
= (gfc_verify_c_interop(&(sym
->ts
)) ? 1 : 0);
1017 if (is_c_interop
!= 1)
1019 /* Make personalized messages to give better feedback. */
1020 if (sym
->ts
.type
== BT_DERIVED
)
1021 gfc_error ("Variable '%s' at %L is a dummy argument to the "
1022 "BIND(C) procedure '%s' but is not C interoperable "
1023 "because derived type '%s' is not C interoperable",
1024 sym
->name
, &(sym
->declared_at
),
1025 sym
->ns
->proc_name
->name
,
1026 sym
->ts
.u
.derived
->name
);
1027 else if (sym
->ts
.type
== BT_CLASS
)
1028 gfc_error ("Variable '%s' at %L is a dummy argument to the "
1029 "BIND(C) procedure '%s' but is not C interoperable "
1030 "because it is polymorphic",
1031 sym
->name
, &(sym
->declared_at
),
1032 sym
->ns
->proc_name
->name
);
1033 else if (gfc_option
.warn_c_binding_type
)
1034 gfc_warning ("Variable '%s' at %L is a dummy argument of the "
1035 "BIND(C) procedure '%s' but may not be C "
1037 sym
->name
, &(sym
->declared_at
),
1038 sym
->ns
->proc_name
->name
);
1041 /* Character strings are only C interoperable if they have a
1043 if (sym
->ts
.type
== BT_CHARACTER
)
1045 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
1046 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
1047 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
1049 gfc_error ("Character argument '%s' at %L "
1050 "must be length 1 because "
1051 "procedure '%s' is BIND(C)",
1052 sym
->name
, &sym
->declared_at
,
1053 sym
->ns
->proc_name
->name
);
1058 /* We have to make sure that any param to a bind(c) routine does
1059 not have the allocatable, pointer, or optional attributes,
1060 according to J3/04-007, section 5.1. */
1061 if (sym
->attr
.allocatable
== 1
1062 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable '%s' at %L with "
1063 "ALLOCATABLE attribute in procedure '%s' "
1064 "with BIND(C)", sym
->name
,
1065 &(sym
->declared_at
),
1066 sym
->ns
->proc_name
->name
))
1069 if (sym
->attr
.pointer
== 1
1070 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable '%s' at %L with "
1071 "POINTER attribute in procedure '%s' "
1072 "with BIND(C)", sym
->name
,
1073 &(sym
->declared_at
),
1074 sym
->ns
->proc_name
->name
))
1077 if ((sym
->attr
.allocatable
|| sym
->attr
.pointer
) && !sym
->as
)
1079 gfc_error ("Scalar variable '%s' at %L with POINTER or "
1080 "ALLOCATABLE in procedure '%s' with BIND(C) is not yet"
1081 " supported", sym
->name
, &(sym
->declared_at
),
1082 sym
->ns
->proc_name
->name
);
1086 if (sym
->attr
.optional
== 1 && sym
->attr
.value
)
1088 gfc_error ("Variable '%s' at %L cannot have both the OPTIONAL "
1089 "and the VALUE attribute because procedure '%s' "
1090 "is BIND(C)", sym
->name
, &(sym
->declared_at
),
1091 sym
->ns
->proc_name
->name
);
1094 else if (sym
->attr
.optional
== 1
1095 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable '%s' "
1096 "at %L with OPTIONAL attribute in "
1097 "procedure '%s' which is BIND(C)",
1098 sym
->name
, &(sym
->declared_at
),
1099 sym
->ns
->proc_name
->name
))
1102 /* Make sure that if it has the dimension attribute, that it is
1103 either assumed size or explicit shape. Deferred shape is already
1104 covered by the pointer/allocatable attribute. */
1105 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SHAPE
1106 && !gfc_notify_std (GFC_STD_F2008_TS
, "Assumed-shape array '%s' "
1107 "at %L as dummy argument to the BIND(C) "
1108 "procedure '%s' at %L", sym
->name
,
1109 &(sym
->declared_at
),
1110 sym
->ns
->proc_name
->name
,
1111 &(sym
->ns
->proc_name
->declared_at
)))
1121 /* Function called by variable_decl() that adds a name to the symbol table. */
1124 build_sym (const char *name
, gfc_charlen
*cl
, bool cl_deferred
,
1125 gfc_array_spec
**as
, locus
*var_locus
)
1127 symbol_attribute attr
;
1130 if (gfc_get_symbol (name
, NULL
, &sym
))
1133 /* Start updating the symbol table. Add basic type attribute if present. */
1134 if (current_ts
.type
!= BT_UNKNOWN
1135 && (sym
->attr
.implicit_type
== 0
1136 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1137 && !gfc_add_type (sym
, ¤t_ts
, var_locus
))
1140 if (sym
->ts
.type
== BT_CHARACTER
)
1143 sym
->ts
.deferred
= cl_deferred
;
1146 /* Add dimension attribute if present. */
1147 if (!gfc_set_array_spec (sym
, *as
, var_locus
))
1151 /* Add attribute to symbol. The copy is so that we can reset the
1152 dimension attribute. */
1153 attr
= current_attr
;
1155 attr
.codimension
= 0;
1157 if (!gfc_copy_attr (&sym
->attr
, &attr
, var_locus
))
1160 /* Finish any work that may need to be done for the binding label,
1161 if it's a bind(c). The bind(c) attr is found before the symbol
1162 is made, and before the symbol name (for data decls), so the
1163 current_ts is holding the binding label, or nothing if the
1164 name= attr wasn't given. Therefore, test here if we're dealing
1165 with a bind(c) and make sure the binding label is set correctly. */
1166 if (sym
->attr
.is_bind_c
== 1)
1168 if (!sym
->binding_label
)
1170 /* Set the binding label and verify that if a NAME= was specified
1171 then only one identifier was in the entity-decl-list. */
1172 if (!set_binding_label (&sym
->binding_label
, sym
->name
,
1173 num_idents_on_line
))
1178 /* See if we know we're in a common block, and if it's a bind(c)
1179 common then we need to make sure we're an interoperable type. */
1180 if (sym
->attr
.in_common
== 1)
1182 /* Test the common block object. */
1183 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1184 && sym
->ts
.is_c_interop
!= 1)
1186 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1187 "must be declared with a C interoperable "
1188 "kind since common block '%s' is BIND(C)",
1189 sym
->name
, sym
->common_block
->name
,
1190 sym
->common_block
->name
);
1195 sym
->attr
.implied_index
= 0;
1197 if (sym
->ts
.type
== BT_CLASS
)
1198 return gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
);
1204 /* Set character constant to the given length. The constant will be padded or
1205 truncated. If we're inside an array constructor without a typespec, we
1206 additionally check that all elements have the same length; check_len -1
1207 means no checking. */
1210 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1215 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1216 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1218 slen
= expr
->value
.character
.length
;
1221 s
= gfc_get_wide_string (len
+ 1);
1222 memcpy (s
, expr
->value
.character
.string
,
1223 MIN (len
, slen
) * sizeof (gfc_char_t
));
1225 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1227 if (gfc_option
.warn_character_truncation
&& slen
> len
)
1228 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1229 "(%d/%d)", &expr
->where
, slen
, len
);
1231 /* Apply the standard by 'hand' otherwise it gets cleared for
1233 if (check_len
!= -1 && slen
!= check_len
1234 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1235 gfc_error_now ("The CHARACTER elements of the array constructor "
1236 "at %L must have the same length (%d/%d)",
1237 &expr
->where
, slen
, check_len
);
1240 free (expr
->value
.character
.string
);
1241 expr
->value
.character
.string
= s
;
1242 expr
->value
.character
.length
= len
;
1247 /* Function to create and update the enumerator history
1248 using the information passed as arguments.
1249 Pointer "max_enum" is also updated, to point to
1250 enum history node containing largest initializer.
1252 SYM points to the symbol node of enumerator.
1253 INIT points to its enumerator value. */
1256 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1258 enumerator_history
*new_enum_history
;
1259 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1261 new_enum_history
= XCNEW (enumerator_history
);
1263 new_enum_history
->sym
= sym
;
1264 new_enum_history
->initializer
= init
;
1265 new_enum_history
->next
= NULL
;
1267 if (enum_history
== NULL
)
1269 enum_history
= new_enum_history
;
1270 max_enum
= enum_history
;
1274 new_enum_history
->next
= enum_history
;
1275 enum_history
= new_enum_history
;
1277 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1278 new_enum_history
->initializer
->value
.integer
) < 0)
1279 max_enum
= new_enum_history
;
1284 /* Function to free enum kind history. */
1287 gfc_free_enum_history (void)
1289 enumerator_history
*current
= enum_history
;
1290 enumerator_history
*next
;
1292 while (current
!= NULL
)
1294 next
= current
->next
;
1299 enum_history
= NULL
;
1303 /* Function called by variable_decl() that adds an initialization
1304 expression to a symbol. */
1307 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1309 symbol_attribute attr
;
1314 if (find_special (name
, &sym
, false))
1319 /* If this symbol is confirming an implicit parameter type,
1320 then an initialization expression is not allowed. */
1321 if (attr
.flavor
== FL_PARAMETER
1322 && sym
->value
!= NULL
1325 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1332 /* An initializer is required for PARAMETER declarations. */
1333 if (attr
.flavor
== FL_PARAMETER
)
1335 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1341 /* If a variable appears in a DATA block, it cannot have an
1345 gfc_error ("Variable '%s' at %C with an initializer already "
1346 "appears in a DATA statement", sym
->name
);
1350 /* Check if the assignment can happen. This has to be put off
1351 until later for derived type variables and procedure pointers. */
1352 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1353 && sym
->ts
.type
!= BT_CLASS
&& init
->ts
.type
!= BT_CLASS
1354 && !sym
->attr
.proc_pointer
1355 && !gfc_check_assign_symbol (sym
, NULL
, init
))
1358 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.u
.cl
1359 && init
->ts
.type
== BT_CHARACTER
)
1361 /* Update symbol character length according initializer. */
1362 if (!gfc_check_assign_symbol (sym
, NULL
, init
))
1365 if (sym
->ts
.u
.cl
->length
== NULL
)
1368 /* If there are multiple CHARACTER variables declared on the
1369 same line, we don't want them to share the same length. */
1370 sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1372 if (sym
->attr
.flavor
== FL_PARAMETER
)
1374 if (init
->expr_type
== EXPR_CONSTANT
)
1376 clen
= init
->value
.character
.length
;
1377 sym
->ts
.u
.cl
->length
1378 = gfc_get_int_expr (gfc_default_integer_kind
,
1381 else if (init
->expr_type
== EXPR_ARRAY
)
1384 c
= gfc_constructor_first (init
->value
.constructor
);
1385 clen
= c
->expr
->value
.character
.length
;
1386 sym
->ts
.u
.cl
->length
1387 = gfc_get_int_expr (gfc_default_integer_kind
,
1390 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
1391 sym
->ts
.u
.cl
->length
=
1392 gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
1395 /* Update initializer character length according symbol. */
1396 else if (sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1398 int len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
1400 if (init
->expr_type
== EXPR_CONSTANT
)
1401 gfc_set_constant_character_len (len
, init
, -1);
1402 else if (init
->expr_type
== EXPR_ARRAY
)
1406 /* Build a new charlen to prevent simplification from
1407 deleting the length before it is resolved. */
1408 init
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1409 init
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->ts
.u
.cl
->length
);
1411 for (c
= gfc_constructor_first (init
->value
.constructor
);
1412 c
; c
= gfc_constructor_next (c
))
1413 gfc_set_constant_character_len (len
, c
->expr
, -1);
1418 /* If sym is implied-shape, set its upper bounds from init. */
1419 if (sym
->attr
.flavor
== FL_PARAMETER
&& sym
->attr
.dimension
1420 && sym
->as
->type
== AS_IMPLIED_SHAPE
)
1424 if (init
->rank
== 0)
1426 gfc_error ("Can't initialize implied-shape array at %L"
1427 " with scalar", &sym
->declared_at
);
1430 gcc_assert (sym
->as
->rank
== init
->rank
);
1432 /* Shape should be present, we get an initialization expression. */
1433 gcc_assert (init
->shape
);
1435 for (dim
= 0; dim
< sym
->as
->rank
; ++dim
)
1441 lower
= sym
->as
->lower
[dim
];
1442 if (lower
->expr_type
!= EXPR_CONSTANT
)
1444 gfc_error ("Non-constant lower bound in implied-shape"
1445 " declaration at %L", &lower
->where
);
1449 /* All dimensions must be without upper bound. */
1450 gcc_assert (!sym
->as
->upper
[dim
]);
1453 e
= gfc_get_constant_expr (BT_INTEGER
, k
, &sym
->declared_at
);
1454 mpz_add (e
->value
.integer
,
1455 lower
->value
.integer
, init
->shape
[dim
]);
1456 mpz_sub_ui (e
->value
.integer
, e
->value
.integer
, 1);
1457 sym
->as
->upper
[dim
] = e
;
1460 sym
->as
->type
= AS_EXPLICIT
;
1463 /* Need to check if the expression we initialized this
1464 to was one of the iso_c_binding named constants. If so,
1465 and we're a parameter (constant), let it be iso_c.
1467 integer(c_int), parameter :: my_int = c_int
1468 integer(my_int) :: my_int_2
1469 If we mark my_int as iso_c (since we can see it's value
1470 is equal to one of the named constants), then my_int_2
1471 will be considered C interoperable. */
1472 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1474 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1475 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1476 /* attr bits needed for module files. */
1477 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1478 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1479 if (init
->ts
.is_iso_c
)
1480 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1483 /* Add initializer. Make sure we keep the ranks sane. */
1484 if (sym
->attr
.dimension
&& init
->rank
== 0)
1489 if (sym
->attr
.flavor
== FL_PARAMETER
1490 && init
->expr_type
== EXPR_CONSTANT
1491 && spec_size (sym
->as
, &size
)
1492 && mpz_cmp_si (size
, 0) > 0)
1494 array
= gfc_get_array_expr (init
->ts
.type
, init
->ts
.kind
,
1496 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1497 gfc_constructor_append_expr (&array
->value
.constructor
,
1500 : gfc_copy_expr (init
),
1503 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1504 for (n
= 0; n
< sym
->as
->rank
; n
++)
1505 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1510 init
->rank
= sym
->as
->rank
;
1514 if (sym
->attr
.save
== SAVE_NONE
)
1515 sym
->attr
.save
= SAVE_IMPLICIT
;
1523 /* Function called by variable_decl() that adds a name to a structure
1527 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1528 gfc_array_spec
**as
)
1533 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1534 constructing, it must have the pointer attribute. */
1535 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1536 && current_ts
.u
.derived
== gfc_current_block ()
1537 && current_attr
.pointer
== 0)
1539 gfc_error ("Component at %C must have the POINTER attribute");
1543 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1545 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1547 gfc_error ("Array component of structure at %C must have explicit "
1548 "or deferred shape");
1553 if (!gfc_add_component (gfc_current_block(), name
, &c
))
1557 if (c
->ts
.type
== BT_CHARACTER
)
1559 c
->attr
= current_attr
;
1561 c
->initializer
= *init
;
1568 c
->attr
.codimension
= 1;
1570 c
->attr
.dimension
= 1;
1574 /* Should this ever get more complicated, combine with similar section
1575 in add_init_expr_to_sym into a separate function. */
1576 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
1578 && c
->ts
.u
.cl
->length
&& c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1582 gcc_assert (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
);
1583 gcc_assert (c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1584 gcc_assert (c
->ts
.u
.cl
->length
->ts
.type
== BT_INTEGER
);
1586 len
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
1588 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1589 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1590 else if (mpz_cmp (c
->ts
.u
.cl
->length
->value
.integer
,
1591 c
->initializer
->ts
.u
.cl
->length
->value
.integer
))
1593 gfc_constructor
*ctor
;
1594 ctor
= gfc_constructor_first (c
->initializer
->value
.constructor
);
1599 bool has_ts
= (c
->initializer
->ts
.u
.cl
1600 && c
->initializer
->ts
.u
.cl
->length_from_typespec
);
1602 /* Remember the length of the first element for checking
1603 that all elements *in the constructor* have the same
1604 length. This need not be the length of the LHS! */
1605 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1606 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1607 first_len
= ctor
->expr
->value
.character
.length
;
1609 for ( ; ctor
; ctor
= gfc_constructor_next (ctor
))
1610 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1612 gfc_set_constant_character_len (len
, ctor
->expr
,
1613 has_ts
? -1 : first_len
);
1614 ctor
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (c
->ts
.u
.cl
->length
);
1620 /* Check array components. */
1621 if (!c
->attr
.dimension
)
1624 if (c
->attr
.pointer
)
1626 if (c
->as
->type
!= AS_DEFERRED
)
1628 gfc_error ("Pointer array component of structure at %C must have a "
1633 else if (c
->attr
.allocatable
)
1635 if (c
->as
->type
!= AS_DEFERRED
)
1637 gfc_error ("Allocatable component of structure at %C must have a "
1644 if (c
->as
->type
!= AS_EXPLICIT
)
1646 gfc_error ("Array component of structure at %C must have an "
1653 if (c
->ts
.type
== BT_CLASS
)
1655 bool t2
= gfc_build_class_symbol (&c
->ts
, &c
->attr
, &c
->as
);
1665 /* Match a 'NULL()', and possibly take care of some side effects. */
1668 gfc_match_null (gfc_expr
**result
)
1671 match m
, m2
= MATCH_NO
;
1673 if ((m
= gfc_match (" null ( )")) == MATCH_ERROR
)
1679 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1681 if ((m2
= gfc_match (" null (")) != MATCH_YES
)
1684 old_loc
= gfc_current_locus
;
1685 if ((m2
= gfc_match (" %n ) ", name
)) == MATCH_ERROR
)
1688 && ((m2
= gfc_match (" mold = %n )", name
)) == MATCH_ERROR
))
1692 gfc_current_locus
= old_loc
;
1697 /* The NULL symbol now has to be/become an intrinsic function. */
1698 if (gfc_get_symbol ("null", NULL
, &sym
))
1700 gfc_error ("NULL() initialization at %C is ambiguous");
1704 gfc_intrinsic_symbol (sym
);
1706 if (sym
->attr
.proc
!= PROC_INTRINSIC
1707 && !(sym
->attr
.use_assoc
&& sym
->attr
.intrinsic
)
1708 && (!gfc_add_procedure(&sym
->attr
, PROC_INTRINSIC
, sym
->name
, NULL
)
1709 || !gfc_add_function (&sym
->attr
, sym
->name
, NULL
)))
1712 *result
= gfc_get_null_expr (&gfc_current_locus
);
1714 /* Invalid per F2008, C512. */
1715 if (m2
== MATCH_YES
)
1717 gfc_error ("NULL() initialization at %C may not have MOLD");
1725 /* Match the initialization expr for a data pointer or procedure pointer. */
1728 match_pointer_init (gfc_expr
**init
, int procptr
)
1732 if (gfc_pure (NULL
) && gfc_state_stack
->state
!= COMP_DERIVED
)
1734 gfc_error ("Initialization of pointer at %C is not allowed in "
1735 "a PURE procedure");
1738 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
1740 /* Match NULL() initialization. */
1741 m
= gfc_match_null (init
);
1745 /* Match non-NULL initialization. */
1746 gfc_matching_ptr_assignment
= !procptr
;
1747 gfc_matching_procptr_assignment
= procptr
;
1748 m
= gfc_match_rvalue (init
);
1749 gfc_matching_ptr_assignment
= 0;
1750 gfc_matching_procptr_assignment
= 0;
1751 if (m
== MATCH_ERROR
)
1753 else if (m
== MATCH_NO
)
1755 gfc_error ("Error in pointer initialization at %C");
1760 gfc_resolve_expr (*init
);
1762 if (!gfc_notify_std (GFC_STD_F2008
, "non-NULL pointer "
1763 "initialization at %C"))
1771 check_function_name (char *name
)
1773 /* In functions that have a RESULT variable defined, the function name always
1774 refers to function calls. Therefore, the name is not allowed to appear in
1775 specification statements. When checking this, be careful about
1776 'hidden' procedure pointer results ('ppr@'). */
1778 if (gfc_current_state () == COMP_FUNCTION
)
1780 gfc_symbol
*block
= gfc_current_block ();
1781 if (block
&& block
->result
&& block
->result
!= block
1782 && strcmp (block
->result
->name
, "ppr@") != 0
1783 && strcmp (block
->name
, name
) == 0)
1785 gfc_error ("Function name '%s' not allowed at %C", name
);
1794 /* Match a variable name with an optional initializer. When this
1795 subroutine is called, a variable is expected to be parsed next.
1796 Depending on what is happening at the moment, updates either the
1797 symbol table or the current interface. */
1800 variable_decl (int elem
)
1802 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1803 gfc_expr
*initializer
, *char_len
;
1805 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1817 /* When we get here, we've just matched a list of attributes and
1818 maybe a type and a double colon. The next thing we expect to see
1819 is the name of the symbol. */
1820 m
= gfc_match_name (name
);
1824 var_locus
= gfc_current_locus
;
1826 /* Now we could see the optional array spec. or character length. */
1827 m
= gfc_match_array_spec (&as
, true, true);
1828 if (m
== MATCH_ERROR
)
1832 as
= gfc_copy_array_spec (current_as
);
1834 && !merge_array_spec (current_as
, as
, true))
1840 if (gfc_option
.flag_cray_pointer
)
1841 cp_as
= gfc_copy_array_spec (as
);
1843 /* At this point, we know for sure if the symbol is PARAMETER and can thus
1844 determine (and check) whether it can be implied-shape. If it
1845 was parsed as assumed-size, change it because PARAMETERs can not
1849 if (as
->type
== AS_IMPLIED_SHAPE
&& current_attr
.flavor
!= FL_PARAMETER
)
1852 gfc_error ("Non-PARAMETER symbol '%s' at %L can't be implied-shape",
1857 if (as
->type
== AS_ASSUMED_SIZE
&& as
->rank
== 1
1858 && current_attr
.flavor
== FL_PARAMETER
)
1859 as
->type
= AS_IMPLIED_SHAPE
;
1861 if (as
->type
== AS_IMPLIED_SHAPE
1862 && !gfc_notify_std (GFC_STD_F2008
, "Implied-shape array at %L",
1872 cl_deferred
= false;
1874 if (current_ts
.type
== BT_CHARACTER
)
1876 switch (match_char_length (&char_len
, &cl_deferred
, false))
1879 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1881 cl
->length
= char_len
;
1884 /* Non-constant lengths need to be copied after the first
1885 element. Also copy assumed lengths. */
1888 && (current_ts
.u
.cl
->length
== NULL
1889 || current_ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1891 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1892 cl
->length
= gfc_copy_expr (current_ts
.u
.cl
->length
);
1895 cl
= current_ts
.u
.cl
;
1897 cl_deferred
= current_ts
.deferred
;
1906 /* If this symbol has already shown up in a Cray Pointer declaration,
1907 and this is not a component declaration,
1908 then we want to set the type & bail out. */
1909 if (gfc_option
.flag_cray_pointer
&& gfc_current_state () != COMP_DERIVED
)
1911 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1912 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
1914 sym
->ts
.type
= current_ts
.type
;
1915 sym
->ts
.kind
= current_ts
.kind
;
1917 sym
->ts
.u
.derived
= current_ts
.u
.derived
;
1918 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
1919 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
1922 /* Check to see if we have an array specification. */
1925 if (sym
->as
!= NULL
)
1927 gfc_error ("Duplicate array spec for Cray pointee at %C");
1928 gfc_free_array_spec (cp_as
);
1934 if (!gfc_set_array_spec (sym
, cp_as
, &var_locus
))
1935 gfc_internal_error ("Couldn't set pointee array spec.");
1937 /* Fix the array spec. */
1938 m
= gfc_mod_pointee_as (sym
->as
);
1939 if (m
== MATCH_ERROR
)
1947 gfc_free_array_spec (cp_as
);
1951 /* Procedure pointer as function result. */
1952 if (gfc_current_state () == COMP_FUNCTION
1953 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
1954 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
1955 strcpy (name
, "ppr@");
1957 if (gfc_current_state () == COMP_FUNCTION
1958 && strcmp (name
, gfc_current_block ()->name
) == 0
1959 && gfc_current_block ()->result
1960 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
1961 strcpy (name
, "ppr@");
1963 /* OK, we've successfully matched the declaration. Now put the
1964 symbol in the current namespace, because it might be used in the
1965 optional initialization expression for this symbol, e.g. this is
1968 integer, parameter :: i = huge(i)
1970 This is only true for parameters or variables of a basic type.
1971 For components of derived types, it is not true, so we don't
1972 create a symbol for those yet. If we fail to create the symbol,
1974 if (gfc_current_state () != COMP_DERIVED
1975 && !build_sym (name
, cl
, cl_deferred
, &as
, &var_locus
))
1981 if (!check_function_name (name
))
1987 /* We allow old-style initializations of the form
1988 integer i /2/, j(4) /3*3, 1/
1989 (if no colon has been seen). These are different from data
1990 statements in that initializers are only allowed to apply to the
1991 variable immediately preceding, i.e.
1993 is not allowed. Therefore we have to do some work manually, that
1994 could otherwise be left to the matchers for DATA statements. */
1996 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
1998 if (!gfc_notify_std (GFC_STD_GNU
, "Old-style "
1999 "initialization at %C"))
2001 else if (gfc_current_state () == COMP_DERIVED
)
2003 gfc_error ("Invalid old style initialization for derived type "
2009 return match_old_style_init (name
);
2012 /* The double colon must be present in order to have initializers.
2013 Otherwise the statement is ambiguous with an assignment statement. */
2016 if (gfc_match (" =>") == MATCH_YES
)
2018 if (!current_attr
.pointer
)
2020 gfc_error ("Initialization at %C isn't for a pointer variable");
2025 m
= match_pointer_init (&initializer
, 0);
2029 else if (gfc_match_char ('=') == MATCH_YES
)
2031 if (current_attr
.pointer
)
2033 gfc_error ("Pointer initialization at %C requires '=>', "
2039 m
= gfc_match_init_expr (&initializer
);
2042 gfc_error ("Expected an initialization expression at %C");
2046 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
)
2047 && gfc_state_stack
->state
!= COMP_DERIVED
)
2049 gfc_error ("Initialization of variable at %C is not allowed in "
2050 "a PURE procedure");
2054 if (current_attr
.flavor
!= FL_PARAMETER
2055 && gfc_state_stack
->state
!= COMP_DERIVED
)
2056 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
2063 if (initializer
!= NULL
&& current_attr
.allocatable
2064 && gfc_current_state () == COMP_DERIVED
)
2066 gfc_error ("Initialization of allocatable component at %C is not "
2072 /* Add the initializer. Note that it is fine if initializer is
2073 NULL here, because we sometimes also need to check if a
2074 declaration *must* have an initialization expression. */
2075 if (gfc_current_state () != COMP_DERIVED
)
2076 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
2079 if (current_ts
.type
== BT_DERIVED
2080 && !current_attr
.pointer
&& !initializer
)
2081 initializer
= gfc_default_initializer (¤t_ts
);
2082 t
= build_struct (name
, cl
, &initializer
, &as
);
2085 m
= (t
) ? MATCH_YES
: MATCH_ERROR
;
2088 /* Free stuff up and return. */
2089 gfc_free_expr (initializer
);
2090 gfc_free_array_spec (as
);
2096 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
2097 This assumes that the byte size is equal to the kind number for
2098 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
2101 gfc_match_old_kind_spec (gfc_typespec
*ts
)
2106 if (gfc_match_char ('*') != MATCH_YES
)
2109 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
2113 original_kind
= ts
->kind
;
2115 /* Massage the kind numbers for complex types. */
2116 if (ts
->type
== BT_COMPLEX
)
2120 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2121 gfc_basic_typename (ts
->type
), original_kind
);
2128 if (ts
->type
== BT_INTEGER
&& ts
->kind
== 4 && gfc_option
.flag_integer4_kind
== 8)
2131 if (ts
->type
== BT_REAL
|| ts
->type
== BT_COMPLEX
)
2135 if (gfc_option
.flag_real4_kind
== 8)
2137 if (gfc_option
.flag_real4_kind
== 10)
2139 if (gfc_option
.flag_real4_kind
== 16)
2145 if (gfc_option
.flag_real8_kind
== 4)
2147 if (gfc_option
.flag_real8_kind
== 10)
2149 if (gfc_option
.flag_real8_kind
== 16)
2154 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2156 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2157 gfc_basic_typename (ts
->type
), original_kind
);
2161 if (!gfc_notify_std (GFC_STD_GNU
,
2162 "Nonstandard type declaration %s*%d at %C",
2163 gfc_basic_typename(ts
->type
), original_kind
))
2170 /* Match a kind specification. Since kinds are generally optional, we
2171 usually return MATCH_NO if something goes wrong. If a "kind="
2172 string is found, then we know we have an error. */
2175 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
2187 where
= loc
= gfc_current_locus
;
2192 if (gfc_match_char ('(') == MATCH_NO
)
2195 /* Also gobbles optional text. */
2196 if (gfc_match (" kind = ") == MATCH_YES
)
2199 loc
= gfc_current_locus
;
2202 n
= gfc_match_init_expr (&e
);
2206 if (gfc_matching_function
)
2208 /* The function kind expression might include use associated or
2209 imported parameters and try again after the specification
2211 if (gfc_match_char (')') != MATCH_YES
)
2213 gfc_error ("Missing right parenthesis at %C");
2219 gfc_undo_symbols ();
2224 /* ....or else, the match is real. */
2226 gfc_error ("Expected initialization expression at %C");
2234 gfc_error ("Expected scalar initialization expression at %C");
2239 msg
= gfc_extract_int (e
, &ts
->kind
);
2248 /* Before throwing away the expression, let's see if we had a
2249 C interoperable kind (and store the fact). */
2250 if (e
->ts
.is_c_interop
== 1)
2252 /* Mark this as C interoperable if being declared with one
2253 of the named constants from iso_c_binding. */
2254 ts
->is_c_interop
= e
->ts
.is_iso_c
;
2255 ts
->f90_type
= e
->ts
.f90_type
;
2261 /* Ignore errors to this point, if we've gotten here. This means
2262 we ignore the m=MATCH_ERROR from above. */
2263 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2265 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
2266 gfc_basic_typename (ts
->type
));
2267 gfc_current_locus
= where
;
2271 /* Warn if, e.g., c_int is used for a REAL variable, but not
2272 if, e.g., c_double is used for COMPLEX as the standard
2273 explicitly says that the kind type parameter for complex and real
2274 variable is the same, i.e. c_float == c_float_complex. */
2275 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2276 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2277 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2278 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2279 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2280 gfc_basic_typename (ts
->type
));
2282 gfc_gobble_whitespace ();
2283 if ((c
= gfc_next_ascii_char ()) != ')'
2284 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2286 if (ts
->type
== BT_CHARACTER
)
2287 gfc_error ("Missing right parenthesis or comma at %C");
2289 gfc_error ("Missing right parenthesis at %C");
2293 /* All tests passed. */
2296 if(m
== MATCH_ERROR
)
2297 gfc_current_locus
= where
;
2299 if (ts
->type
== BT_INTEGER
&& ts
->kind
== 4 && gfc_option
.flag_integer4_kind
== 8)
2302 if (ts
->type
== BT_REAL
|| ts
->type
== BT_COMPLEX
)
2306 if (gfc_option
.flag_real4_kind
== 8)
2308 if (gfc_option
.flag_real4_kind
== 10)
2310 if (gfc_option
.flag_real4_kind
== 16)
2316 if (gfc_option
.flag_real8_kind
== 4)
2318 if (gfc_option
.flag_real8_kind
== 10)
2320 if (gfc_option
.flag_real8_kind
== 16)
2325 /* Return what we know from the test(s). */
2330 gfc_current_locus
= where
;
2336 match_char_kind (int * kind
, int * is_iso_c
)
2345 where
= gfc_current_locus
;
2347 n
= gfc_match_init_expr (&e
);
2349 if (n
!= MATCH_YES
&& gfc_matching_function
)
2351 /* The expression might include use-associated or imported
2352 parameters and try again after the specification
2355 gfc_undo_symbols ();
2360 gfc_error ("Expected initialization expression at %C");
2366 gfc_error ("Expected scalar initialization expression at %C");
2371 msg
= gfc_extract_int (e
, kind
);
2372 *is_iso_c
= e
->ts
.is_iso_c
;
2382 /* Ignore errors to this point, if we've gotten here. This means
2383 we ignore the m=MATCH_ERROR from above. */
2384 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2386 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2390 /* All tests passed. */
2393 if (m
== MATCH_ERROR
)
2394 gfc_current_locus
= where
;
2396 /* Return what we know from the test(s). */
2401 gfc_current_locus
= where
;
2406 /* Match the various kind/length specifications in a CHARACTER
2407 declaration. We don't return MATCH_NO. */
2410 gfc_match_char_spec (gfc_typespec
*ts
)
2412 int kind
, seen_length
, is_iso_c
;
2424 /* Try the old-style specification first. */
2425 old_char_selector
= 0;
2427 m
= match_char_length (&len
, &deferred
, true);
2431 old_char_selector
= 1;
2436 m
= gfc_match_char ('(');
2439 m
= MATCH_YES
; /* Character without length is a single char. */
2443 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2444 if (gfc_match (" kind =") == MATCH_YES
)
2446 m
= match_char_kind (&kind
, &is_iso_c
);
2448 if (m
== MATCH_ERROR
)
2453 if (gfc_match (" , len =") == MATCH_NO
)
2456 m
= char_len_param_value (&len
, &deferred
);
2459 if (m
== MATCH_ERROR
)
2466 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2467 if (gfc_match (" len =") == MATCH_YES
)
2469 m
= char_len_param_value (&len
, &deferred
);
2472 if (m
== MATCH_ERROR
)
2476 if (gfc_match_char (')') == MATCH_YES
)
2479 if (gfc_match (" , kind =") != MATCH_YES
)
2482 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2488 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2489 m
= char_len_param_value (&len
, &deferred
);
2492 if (m
== MATCH_ERROR
)
2496 m
= gfc_match_char (')');
2500 if (gfc_match_char (',') != MATCH_YES
)
2503 gfc_match (" kind ="); /* Gobble optional text. */
2505 m
= match_char_kind (&kind
, &is_iso_c
);
2506 if (m
== MATCH_ERROR
)
2512 /* Require a right-paren at this point. */
2513 m
= gfc_match_char (')');
2518 gfc_error ("Syntax error in CHARACTER declaration at %C");
2520 gfc_free_expr (len
);
2524 /* Deal with character functions after USE and IMPORT statements. */
2525 if (gfc_matching_function
)
2527 gfc_free_expr (len
);
2528 gfc_undo_symbols ();
2534 gfc_free_expr (len
);
2538 /* Do some final massaging of the length values. */
2539 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2541 if (seen_length
== 0)
2542 cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
2547 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2548 ts
->deferred
= deferred
;
2550 /* We have to know if it was a C interoperable kind so we can
2551 do accurate type checking of bind(c) procs, etc. */
2553 /* Mark this as C interoperable if being declared with one
2554 of the named constants from iso_c_binding. */
2555 ts
->is_c_interop
= is_iso_c
;
2556 else if (len
!= NULL
)
2557 /* Here, we might have parsed something such as: character(c_char)
2558 In this case, the parsing code above grabs the c_char when
2559 looking for the length (line 1690, roughly). it's the last
2560 testcase for parsing the kind params of a character variable.
2561 However, it's not actually the length. this seems like it
2563 To see if the user used a C interop kind, test the expr
2564 of the so called length, and see if it's C interoperable. */
2565 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2571 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2572 structure to the matched specification. This is necessary for FUNCTION and
2573 IMPLICIT statements.
2575 If implicit_flag is nonzero, then we don't check for the optional
2576 kind specification. Not doing so is needed for matching an IMPLICIT
2577 statement correctly. */
2580 gfc_match_decl_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2582 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2583 gfc_symbol
*sym
, *dt_sym
;
2586 bool seen_deferred_kind
, matched_type
;
2587 const char *dt_name
;
2589 /* A belt and braces check that the typespec is correctly being treated
2590 as a deferred characteristic association. */
2591 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2592 && (gfc_current_block ()->result
->ts
.kind
== -1)
2593 && (ts
->kind
== -1);
2595 if (seen_deferred_kind
)
2598 /* Clear the current binding label, in case one is given. */
2599 curr_binding_label
= NULL
;
2601 if (gfc_match (" byte") == MATCH_YES
)
2603 if (!gfc_notify_std (GFC_STD_GNU
, "BYTE type at %C"))
2606 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2608 gfc_error ("BYTE type used at %C "
2609 "is not available on the target machine");
2613 ts
->type
= BT_INTEGER
;
2619 m
= gfc_match (" type (");
2620 matched_type
= (m
== MATCH_YES
);
2623 gfc_gobble_whitespace ();
2624 if (gfc_peek_ascii_char () == '*')
2626 if ((m
= gfc_match ("*)")) != MATCH_YES
)
2628 if (gfc_current_state () == COMP_DERIVED
)
2630 gfc_error ("Assumed type at %C is not allowed for components");
2633 if (!gfc_notify_std (GFC_STD_F2008_TS
, "Assumed type "
2636 ts
->type
= BT_ASSUMED
;
2640 m
= gfc_match ("%n", name
);
2641 matched_type
= (m
== MATCH_YES
);
2644 if ((matched_type
&& strcmp ("integer", name
) == 0)
2645 || (!matched_type
&& gfc_match (" integer") == MATCH_YES
))
2647 ts
->type
= BT_INTEGER
;
2648 ts
->kind
= gfc_default_integer_kind
;
2652 if ((matched_type
&& strcmp ("character", name
) == 0)
2653 || (!matched_type
&& gfc_match (" character") == MATCH_YES
))
2656 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2657 "intrinsic-type-spec at %C"))
2660 ts
->type
= BT_CHARACTER
;
2661 if (implicit_flag
== 0)
2662 m
= gfc_match_char_spec (ts
);
2666 if (matched_type
&& m
== MATCH_YES
&& gfc_match_char (')') != MATCH_YES
)
2672 if ((matched_type
&& strcmp ("real", name
) == 0)
2673 || (!matched_type
&& gfc_match (" real") == MATCH_YES
))
2676 ts
->kind
= gfc_default_real_kind
;
2681 && (strcmp ("doubleprecision", name
) == 0
2682 || (strcmp ("double", name
) == 0
2683 && gfc_match (" precision") == MATCH_YES
)))
2684 || (!matched_type
&& gfc_match (" double precision") == MATCH_YES
))
2687 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2688 "intrinsic-type-spec at %C"))
2690 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2694 ts
->kind
= gfc_default_double_kind
;
2698 if ((matched_type
&& strcmp ("complex", name
) == 0)
2699 || (!matched_type
&& gfc_match (" complex") == MATCH_YES
))
2701 ts
->type
= BT_COMPLEX
;
2702 ts
->kind
= gfc_default_complex_kind
;
2707 && (strcmp ("doublecomplex", name
) == 0
2708 || (strcmp ("double", name
) == 0
2709 && gfc_match (" complex") == MATCH_YES
)))
2710 || (!matched_type
&& gfc_match (" double complex") == MATCH_YES
))
2712 if (!gfc_notify_std (GFC_STD_GNU
, "DOUBLE COMPLEX at %C"))
2716 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2717 "intrinsic-type-spec at %C"))
2720 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2723 ts
->type
= BT_COMPLEX
;
2724 ts
->kind
= gfc_default_double_kind
;
2728 if ((matched_type
&& strcmp ("logical", name
) == 0)
2729 || (!matched_type
&& gfc_match (" logical") == MATCH_YES
))
2731 ts
->type
= BT_LOGICAL
;
2732 ts
->kind
= gfc_default_logical_kind
;
2737 m
= gfc_match_char (')');
2740 ts
->type
= BT_DERIVED
;
2743 /* Match CLASS declarations. */
2744 m
= gfc_match (" class ( * )");
2745 if (m
== MATCH_ERROR
)
2747 else if (m
== MATCH_YES
)
2751 ts
->type
= BT_CLASS
;
2752 gfc_find_symbol ("STAR", gfc_current_ns
, 1, &upe
);
2755 upe
= gfc_new_symbol ("STAR", gfc_current_ns
);
2756 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "STAR");
2758 gfc_set_sym_referenced (upe
);
2760 upe
->ts
.type
= BT_VOID
;
2761 upe
->attr
.unlimited_polymorphic
= 1;
2762 /* This is essential to force the construction of
2763 unlimited polymorphic component class containers. */
2764 upe
->attr
.zero_comp
= 1;
2765 if (!gfc_add_flavor (&upe
->attr
, FL_DERIVED
, NULL
,
2766 &gfc_current_locus
))
2771 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, "STAR");
2773 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "STAR");
2777 ts
->u
.derived
= upe
;
2781 m
= gfc_match (" class ( %n )", name
);
2784 ts
->type
= BT_CLASS
;
2786 if (!gfc_notify_std (GFC_STD_F2003
, "CLASS statement at %C"))
2790 /* Defer association of the derived type until the end of the
2791 specification block. However, if the derived type can be
2792 found, add it to the typespec. */
2793 if (gfc_matching_function
)
2795 ts
->u
.derived
= NULL
;
2796 if (gfc_current_state () != COMP_INTERFACE
2797 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2799 sym
= gfc_find_dt_in_generic (sym
);
2800 ts
->u
.derived
= sym
;
2805 /* Search for the name but allow the components to be defined later. If
2806 type = -1, this typespec has been seen in a function declaration but
2807 the type could not be accessed at that point. The actual derived type is
2808 stored in a symtree with the first letter of the name capitalized; the
2809 symtree with the all lower-case name contains the associated
2810 generic function. */
2811 dt_name
= gfc_get_string ("%c%s",
2812 (char) TOUPPER ((unsigned char) name
[0]),
2813 (const char*)&name
[1]);
2818 gfc_get_ha_symbol (name
, &sym
);
2819 if (sym
->generic
&& gfc_find_symbol (dt_name
, NULL
, 0, &dt_sym
))
2821 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2824 if (sym
->generic
&& !dt_sym
)
2825 dt_sym
= gfc_find_dt_in_generic (sym
);
2827 else if (ts
->kind
== -1)
2829 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2830 || gfc_current_ns
->has_import_set
;
2831 gfc_find_symbol (name
, NULL
, iface
, &sym
);
2832 if (sym
&& sym
->generic
&& gfc_find_symbol (dt_name
, NULL
, 1, &dt_sym
))
2834 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2837 if (sym
&& sym
->generic
&& !dt_sym
)
2838 dt_sym
= gfc_find_dt_in_generic (sym
);
2845 if ((sym
->attr
.flavor
!= FL_UNKNOWN
2846 && !(sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.generic
))
2847 || sym
->attr
.subroutine
)
2849 gfc_error ("Type name '%s' at %C conflicts with previously declared "
2850 "entity at %L, which has the same name", name
,
2855 gfc_set_sym_referenced (sym
);
2856 if (!sym
->attr
.generic
2857 && !gfc_add_generic (&sym
->attr
, sym
->name
, NULL
))
2860 if (!sym
->attr
.function
2861 && !gfc_add_function (&sym
->attr
, sym
->name
, NULL
))
2866 gfc_interface
*intr
, *head
;
2868 /* Use upper case to save the actual derived-type symbol. */
2869 gfc_get_symbol (dt_name
, NULL
, &dt_sym
);
2870 dt_sym
->name
= gfc_get_string (sym
->name
);
2871 head
= sym
->generic
;
2872 intr
= gfc_get_interface ();
2874 intr
->where
= gfc_current_locus
;
2876 sym
->generic
= intr
;
2877 sym
->attr
.if_source
= IFSRC_DECL
;
2880 gfc_set_sym_referenced (dt_sym
);
2882 if (dt_sym
->attr
.flavor
!= FL_DERIVED
2883 && !gfc_add_flavor (&dt_sym
->attr
, FL_DERIVED
, sym
->name
, NULL
))
2886 ts
->u
.derived
= dt_sym
;
2892 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2893 "intrinsic-type-spec at %C"))
2896 /* For all types except double, derived and character, look for an
2897 optional kind specifier. MATCH_NO is actually OK at this point. */
2898 if (implicit_flag
== 1)
2900 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2906 if (gfc_current_form
== FORM_FREE
)
2908 c
= gfc_peek_ascii_char ();
2909 if (!gfc_is_whitespace (c
) && c
!= '*' && c
!= '('
2910 && c
!= ':' && c
!= ',')
2912 if (matched_type
&& c
== ')')
2914 gfc_next_ascii_char ();
2921 m
= gfc_match_kind_spec (ts
, false);
2922 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2923 m
= gfc_match_old_kind_spec (ts
);
2925 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2928 /* Defer association of the KIND expression of function results
2929 until after USE and IMPORT statements. */
2930 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2931 || gfc_matching_function
)
2935 m
= MATCH_YES
; /* No kind specifier found. */
2941 /* Match an IMPLICIT NONE statement. Actually, this statement is
2942 already matched in parse.c, or we would not end up here in the
2943 first place. So the only thing we need to check, is if there is
2944 trailing garbage. If not, the match is successful. */
2947 gfc_match_implicit_none (void)
2951 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2953 bool external
= false;
2954 locus cur_loc
= gfc_current_locus
;
2956 if (gfc_current_ns
->seen_implicit_none
2957 || gfc_current_ns
->has_implicit_none_export
)
2959 gfc_error ("Duplicate IMPLICIT NONE statement at %C");
2963 gfc_gobble_whitespace ();
2964 c
= gfc_peek_ascii_char ();
2967 (void) gfc_next_ascii_char ();
2968 if (!gfc_notify_std (GFC_STD_F2015
, "IMPORT NONE with spec list at %C"))
2971 gfc_gobble_whitespace ();
2972 if (gfc_peek_ascii_char () == ')')
2974 (void) gfc_next_ascii_char ();
2980 m
= gfc_match (" %n", name
);
2984 if (strcmp (name
, "type") == 0)
2986 else if (strcmp (name
, "external") == 0)
2991 gfc_gobble_whitespace ();
2992 c
= gfc_next_ascii_char ();
3003 if (gfc_match_eos () != MATCH_YES
)
3006 gfc_set_implicit_none (type
, external
, &cur_loc
);
3012 /* Match the letter range(s) of an IMPLICIT statement. */
3015 match_implicit_range (void)
3021 cur_loc
= gfc_current_locus
;
3023 gfc_gobble_whitespace ();
3024 c
= gfc_next_ascii_char ();
3027 gfc_error ("Missing character range in IMPLICIT at %C");
3034 gfc_gobble_whitespace ();
3035 c1
= gfc_next_ascii_char ();
3039 gfc_gobble_whitespace ();
3040 c
= gfc_next_ascii_char ();
3045 inner
= 0; /* Fall through. */
3052 gfc_gobble_whitespace ();
3053 c2
= gfc_next_ascii_char ();
3057 gfc_gobble_whitespace ();
3058 c
= gfc_next_ascii_char ();
3060 if ((c
!= ',') && (c
!= ')'))
3073 gfc_error ("Letters must be in alphabetic order in "
3074 "IMPLICIT statement at %C");
3078 /* See if we can add the newly matched range to the pending
3079 implicits from this IMPLICIT statement. We do not check for
3080 conflicts with whatever earlier IMPLICIT statements may have
3081 set. This is done when we've successfully finished matching
3083 if (!gfc_add_new_implicit_range (c1
, c2
))
3090 gfc_syntax_error (ST_IMPLICIT
);
3092 gfc_current_locus
= cur_loc
;
3097 /* Match an IMPLICIT statement, storing the types for
3098 gfc_set_implicit() if the statement is accepted by the parser.
3099 There is a strange looking, but legal syntactic construction
3100 possible. It looks like:
3102 IMPLICIT INTEGER (a-b) (c-d)
3104 This is legal if "a-b" is a constant expression that happens to
3105 equal one of the legal kinds for integers. The real problem
3106 happens with an implicit specification that looks like:
3108 IMPLICIT INTEGER (a-b)
3110 In this case, a typespec matcher that is "greedy" (as most of the
3111 matchers are) gobbles the character range as a kindspec, leaving
3112 nothing left. We therefore have to go a bit more slowly in the
3113 matching process by inhibiting the kindspec checking during
3114 typespec matching and checking for a kind later. */
3117 gfc_match_implicit (void)
3124 if (gfc_current_ns
->seen_implicit_none
)
3126 gfc_error ("IMPLICIT statement at %C following an IMPLICIT NONE (type) "
3133 /* We don't allow empty implicit statements. */
3134 if (gfc_match_eos () == MATCH_YES
)
3136 gfc_error ("Empty IMPLICIT statement at %C");
3142 /* First cleanup. */
3143 gfc_clear_new_implicit ();
3145 /* A basic type is mandatory here. */
3146 m
= gfc_match_decl_type_spec (&ts
, 1);
3147 if (m
== MATCH_ERROR
)
3152 cur_loc
= gfc_current_locus
;
3153 m
= match_implicit_range ();
3157 /* We may have <TYPE> (<RANGE>). */
3158 gfc_gobble_whitespace ();
3159 c
= gfc_peek_ascii_char ();
3160 if (c
== ',' || c
== '\n' || c
== ';' || c
== '!')
3162 /* Check for CHARACTER with no length parameter. */
3163 if (ts
.type
== BT_CHARACTER
&& !ts
.u
.cl
)
3165 ts
.kind
= gfc_default_character_kind
;
3166 ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
3167 ts
.u
.cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
,
3171 /* Record the Successful match. */
3172 if (!gfc_merge_new_implicit (&ts
))
3175 c
= gfc_next_ascii_char ();
3176 else if (gfc_match_eos () == MATCH_ERROR
)
3181 gfc_current_locus
= cur_loc
;
3184 /* Discard the (incorrectly) matched range. */
3185 gfc_clear_new_implicit ();
3187 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
3188 if (ts
.type
== BT_CHARACTER
)
3189 m
= gfc_match_char_spec (&ts
);
3192 m
= gfc_match_kind_spec (&ts
, false);
3195 m
= gfc_match_old_kind_spec (&ts
);
3196 if (m
== MATCH_ERROR
)
3202 if (m
== MATCH_ERROR
)
3205 m
= match_implicit_range ();
3206 if (m
== MATCH_ERROR
)
3211 gfc_gobble_whitespace ();
3212 c
= gfc_next_ascii_char ();
3213 if (c
!= ',' && gfc_match_eos () != MATCH_YES
)
3216 if (!gfc_merge_new_implicit (&ts
))
3224 gfc_syntax_error (ST_IMPLICIT
);
3232 gfc_match_import (void)
3234 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3239 if (gfc_current_ns
->proc_name
== NULL
3240 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
3242 gfc_error ("IMPORT statement at %C only permitted in "
3243 "an INTERFACE body");
3247 if (!gfc_notify_std (GFC_STD_F2003
, "IMPORT statement at %C"))
3250 if (gfc_match_eos () == MATCH_YES
)
3252 /* All host variables should be imported. */
3253 gfc_current_ns
->has_import_set
= 1;
3257 if (gfc_match (" ::") == MATCH_YES
)
3259 if (gfc_match_eos () == MATCH_YES
)
3261 gfc_error ("Expecting list of named entities at %C");
3269 m
= gfc_match (" %n", name
);
3273 if (gfc_current_ns
->parent
!= NULL
3274 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
3276 gfc_error ("Type name '%s' at %C is ambiguous", name
);
3279 else if (!sym
&& gfc_current_ns
->proc_name
->ns
->parent
!= NULL
3280 && gfc_find_symbol (name
,
3281 gfc_current_ns
->proc_name
->ns
->parent
,
3284 gfc_error ("Type name '%s' at %C is ambiguous", name
);
3290 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
3291 "at %C - does not exist.", name
);
3295 if (gfc_find_symtree (gfc_current_ns
->sym_root
, name
))
3297 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
3302 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
3305 sym
->attr
.imported
= 1;
3307 if (sym
->attr
.generic
&& (sym
= gfc_find_dt_in_generic (sym
)))
3309 /* The actual derived type is stored in a symtree with the first
3310 letter of the name capitalized; the symtree with the all
3311 lower-case name contains the associated generic function. */
3312 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
,
3313 gfc_get_string ("%c%s",
3314 (char) TOUPPER ((unsigned char) name
[0]),
3318 sym
->attr
.imported
= 1;
3331 if (gfc_match_eos () == MATCH_YES
)
3333 if (gfc_match_char (',') != MATCH_YES
)
3340 gfc_error ("Syntax error in IMPORT statement at %C");
3345 /* A minimal implementation of gfc_match without whitespace, escape
3346 characters or variable arguments. Returns true if the next
3347 characters match the TARGET template exactly. */
3350 match_string_p (const char *target
)
3354 for (p
= target
; *p
; p
++)
3355 if ((char) gfc_next_ascii_char () != *p
)
3360 /* Matches an attribute specification including array specs. If
3361 successful, leaves the variables current_attr and current_as
3362 holding the specification. Also sets the colon_seen variable for
3363 later use by matchers associated with initializations.
3365 This subroutine is a little tricky in the sense that we don't know
3366 if we really have an attr-spec until we hit the double colon.
3367 Until that time, we can only return MATCH_NO. This forces us to
3368 check for duplicate specification at this level. */
3371 match_attr_spec (void)
3373 /* Modifiers that can exist in a type statement. */
3375 { GFC_DECL_BEGIN
= 0,
3376 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
3377 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
3378 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
3379 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
3380 DECL_IS_BIND_C
, DECL_CODIMENSION
, DECL_ASYNCHRONOUS
, DECL_CONTIGUOUS
,
3381 DECL_NONE
, GFC_DECL_END
/* Sentinel */
3384 /* GFC_DECL_END is the sentinel, index starts at 0. */
3385 #define NUM_DECL GFC_DECL_END
3387 locus start
, seen_at
[NUM_DECL
];
3394 gfc_clear_attr (¤t_attr
);
3395 start
= gfc_current_locus
;
3400 /* See if we get all of the keywords up to the final double colon. */
3401 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3409 gfc_gobble_whitespace ();
3411 ch
= gfc_next_ascii_char ();
3414 /* This is the successful exit condition for the loop. */
3415 if (gfc_next_ascii_char () == ':')
3420 gfc_gobble_whitespace ();
3421 switch (gfc_peek_ascii_char ())
3424 gfc_next_ascii_char ();
3425 switch (gfc_next_ascii_char ())
3428 if (match_string_p ("locatable"))
3430 /* Matched "allocatable". */
3431 d
= DECL_ALLOCATABLE
;
3436 if (match_string_p ("ynchronous"))
3438 /* Matched "asynchronous". */
3439 d
= DECL_ASYNCHRONOUS
;
3446 /* Try and match the bind(c). */
3447 m
= gfc_match_bind_c (NULL
, true);
3450 else if (m
== MATCH_ERROR
)
3455 gfc_next_ascii_char ();
3456 if ('o' != gfc_next_ascii_char ())
3458 switch (gfc_next_ascii_char ())
3461 if (match_string_p ("imension"))
3463 d
= DECL_CODIMENSION
;
3467 if (match_string_p ("tiguous"))
3469 d
= DECL_CONTIGUOUS
;
3476 if (match_string_p ("dimension"))
3481 if (match_string_p ("external"))
3486 if (match_string_p ("int"))
3488 ch
= gfc_next_ascii_char ();
3491 if (match_string_p ("nt"))
3493 /* Matched "intent". */
3494 /* TODO: Call match_intent_spec from here. */
3495 if (gfc_match (" ( in out )") == MATCH_YES
)
3497 else if (gfc_match (" ( in )") == MATCH_YES
)
3499 else if (gfc_match (" ( out )") == MATCH_YES
)
3505 if (match_string_p ("insic"))
3507 /* Matched "intrinsic". */
3515 if (match_string_p ("optional"))
3520 gfc_next_ascii_char ();
3521 switch (gfc_next_ascii_char ())
3524 if (match_string_p ("rameter"))
3526 /* Matched "parameter". */
3532 if (match_string_p ("inter"))
3534 /* Matched "pointer". */
3540 ch
= gfc_next_ascii_char ();
3543 if (match_string_p ("vate"))
3545 /* Matched "private". */
3551 if (match_string_p ("tected"))
3553 /* Matched "protected". */
3560 if (match_string_p ("blic"))
3562 /* Matched "public". */
3570 if (match_string_p ("save"))
3575 if (match_string_p ("target"))
3580 gfc_next_ascii_char ();
3581 ch
= gfc_next_ascii_char ();
3584 if (match_string_p ("lue"))
3586 /* Matched "value". */
3592 if (match_string_p ("latile"))
3594 /* Matched "volatile". */
3602 /* No double colon and no recognizable decl_type, so assume that
3603 we've been looking at something else the whole time. */
3610 /* Check to make sure any parens are paired up correctly. */
3611 if (gfc_match_parens () == MATCH_ERROR
)
3618 seen_at
[d
] = gfc_current_locus
;
3620 if (d
== DECL_DIMENSION
|| d
== DECL_CODIMENSION
)
3622 gfc_array_spec
*as
= NULL
;
3624 m
= gfc_match_array_spec (&as
, d
== DECL_DIMENSION
,
3625 d
== DECL_CODIMENSION
);
3627 if (current_as
== NULL
)
3629 else if (m
== MATCH_YES
)
3631 if (!merge_array_spec (as
, current_as
, false))
3638 if (d
== DECL_CODIMENSION
)
3639 gfc_error ("Missing codimension specification at %C");
3641 gfc_error ("Missing dimension specification at %C");
3645 if (m
== MATCH_ERROR
)
3650 /* Since we've seen a double colon, we have to be looking at an
3651 attr-spec. This means that we can now issue errors. */
3652 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3657 case DECL_ALLOCATABLE
:
3658 attr
= "ALLOCATABLE";
3660 case DECL_ASYNCHRONOUS
:
3661 attr
= "ASYNCHRONOUS";
3663 case DECL_CODIMENSION
:
3664 attr
= "CODIMENSION";
3666 case DECL_CONTIGUOUS
:
3667 attr
= "CONTIGUOUS";
3669 case DECL_DIMENSION
:
3676 attr
= "INTENT (IN)";
3679 attr
= "INTENT (OUT)";
3682 attr
= "INTENT (IN OUT)";
3684 case DECL_INTRINSIC
:
3690 case DECL_PARAMETER
:
3696 case DECL_PROTECTED
:
3711 case DECL_IS_BIND_C
:
3721 attr
= NULL
; /* This shouldn't happen. */
3724 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3729 /* Now that we've dealt with duplicate attributes, add the attributes
3730 to the current attribute. */
3731 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3736 if (gfc_current_state () == COMP_DERIVED
3737 && d
!= DECL_DIMENSION
&& d
!= DECL_CODIMENSION
3738 && d
!= DECL_POINTER
&& d
!= DECL_PRIVATE
3739 && d
!= DECL_PUBLIC
&& d
!= DECL_CONTIGUOUS
&& d
!= DECL_NONE
)
3741 if (d
== DECL_ALLOCATABLE
)
3743 if (!gfc_notify_std (GFC_STD_F2003
, "ALLOCATABLE "
3744 "attribute at %C in a TYPE definition"))
3752 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3759 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3760 && gfc_current_state () != COMP_MODULE
)
3762 if (d
== DECL_PRIVATE
)
3766 if (gfc_current_state () == COMP_DERIVED
3767 && gfc_state_stack
->previous
3768 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3770 if (!gfc_notify_std (GFC_STD_F2003
, "Attribute %s "
3771 "at %L in a TYPE definition", attr
,
3780 gfc_error ("%s attribute at %L is not allowed outside of the "
3781 "specification part of a module", attr
, &seen_at
[d
]);
3789 case DECL_ALLOCATABLE
:
3790 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3793 case DECL_ASYNCHRONOUS
:
3794 if (!gfc_notify_std (GFC_STD_F2003
, "ASYNCHRONOUS attribute at %C"))
3797 t
= gfc_add_asynchronous (¤t_attr
, NULL
, &seen_at
[d
]);
3800 case DECL_CODIMENSION
:
3801 t
= gfc_add_codimension (¤t_attr
, NULL
, &seen_at
[d
]);
3804 case DECL_CONTIGUOUS
:
3805 if (!gfc_notify_std (GFC_STD_F2008
, "CONTIGUOUS attribute at %C"))
3808 t
= gfc_add_contiguous (¤t_attr
, NULL
, &seen_at
[d
]);
3811 case DECL_DIMENSION
:
3812 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3816 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3820 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3824 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3828 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3831 case DECL_INTRINSIC
:
3832 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3836 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3839 case DECL_PARAMETER
:
3840 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3844 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3847 case DECL_PROTECTED
:
3848 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3850 gfc_error ("PROTECTED at %C only allowed in specification "
3851 "part of a module");
3856 if (!gfc_notify_std (GFC_STD_F2003
, "PROTECTED attribute at %C"))
3859 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3863 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3868 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3873 t
= gfc_add_save (¤t_attr
, SAVE_EXPLICIT
, NULL
, &seen_at
[d
]);
3877 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3880 case DECL_IS_BIND_C
:
3881 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3885 if (!gfc_notify_std (GFC_STD_F2003
, "VALUE attribute at %C"))
3888 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3892 if (!gfc_notify_std (GFC_STD_F2003
, "VOLATILE attribute at %C"))
3895 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3899 gfc_internal_error ("match_attr_spec(): Bad attribute");
3909 /* Since Fortran 2008 module variables implicitly have the SAVE attribute. */
3910 if (gfc_current_state () == COMP_MODULE
&& !current_attr
.save
3911 && (gfc_option
.allow_std
& GFC_STD_F2008
) != 0)
3912 current_attr
.save
= SAVE_IMPLICIT
;
3918 gfc_current_locus
= start
;
3919 gfc_free_array_spec (current_as
);
3925 /* Set the binding label, dest_label, either with the binding label
3926 stored in the given gfc_typespec, ts, or if none was provided, it
3927 will be the symbol name in all lower case, as required by the draft
3928 (J3/04-007, section 15.4.1). If a binding label was given and
3929 there is more than one argument (num_idents), it is an error. */
3932 set_binding_label (const char **dest_label
, const char *sym_name
,
3935 if (num_idents
> 1 && has_name_equals
)
3937 gfc_error ("Multiple identifiers provided with "
3938 "single NAME= specifier at %C");
3942 if (curr_binding_label
)
3943 /* Binding label given; store in temp holder till have sym. */
3944 *dest_label
= curr_binding_label
;
3947 /* No binding label given, and the NAME= specifier did not exist,
3948 which means there was no NAME="". */
3949 if (sym_name
!= NULL
&& has_name_equals
== 0)
3950 *dest_label
= IDENTIFIER_POINTER (get_identifier (sym_name
));
3957 /* Set the status of the given common block as being BIND(C) or not,
3958 depending on the given parameter, is_bind_c. */
3961 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3963 com_block
->is_bind_c
= is_bind_c
;
3968 /* Verify that the given gfc_typespec is for a C interoperable type. */
3971 gfc_verify_c_interop (gfc_typespec
*ts
)
3973 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
!= NULL
)
3974 return (ts
->u
.derived
->ts
.is_c_interop
|| ts
->u
.derived
->attr
.is_bind_c
)
3976 else if (ts
->type
== BT_CLASS
)
3978 else if (ts
->is_c_interop
!= 1 && ts
->type
!= BT_ASSUMED
)
3985 /* Verify that the variables of a given common block, which has been
3986 defined with the attribute specifier bind(c), to be of a C
3987 interoperable type. Errors will be reported here, if
3991 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3993 gfc_symbol
*curr_sym
= NULL
;
3996 curr_sym
= com_block
->head
;
3998 /* Make sure we have at least one symbol. */
3999 if (curr_sym
== NULL
)
4002 /* Here we know we have a symbol, so we'll execute this loop
4006 /* The second to last param, 1, says this is in a common block. */
4007 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
4008 curr_sym
= curr_sym
->common_next
;
4009 } while (curr_sym
!= NULL
);
4015 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
4016 an appropriate error message is reported. */
4019 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
4020 int is_in_common
, gfc_common_head
*com_block
)
4022 bool bind_c_function
= false;
4025 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
4026 bind_c_function
= true;
4028 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
4030 tmp_sym
= tmp_sym
->result
;
4031 /* Make sure it wasn't an implicitly typed result. */
4032 if (tmp_sym
->attr
.implicit_type
&& gfc_option
.warn_c_binding_type
)
4034 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
4035 "%L may not be C interoperable", tmp_sym
->name
,
4036 &tmp_sym
->declared_at
);
4037 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
4038 /* Mark it as C interoperable to prevent duplicate warnings. */
4039 tmp_sym
->ts
.is_c_interop
= 1;
4040 tmp_sym
->attr
.is_c_interop
= 1;
4044 /* Here, we know we have the bind(c) attribute, so if we have
4045 enough type info, then verify that it's a C interop kind.
4046 The info could be in the symbol already, or possibly still in
4047 the given ts (current_ts), so look in both. */
4048 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
4050 if (!gfc_verify_c_interop (&(tmp_sym
->ts
)))
4052 /* See if we're dealing with a sym in a common block or not. */
4053 if (is_in_common
== 1 && gfc_option
.warn_c_binding_type
)
4055 gfc_warning ("Variable '%s' in common block '%s' at %L "
4056 "may not be a C interoperable "
4057 "kind though common block '%s' is BIND(C)",
4058 tmp_sym
->name
, com_block
->name
,
4059 &(tmp_sym
->declared_at
), com_block
->name
);
4063 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
4064 gfc_error ("Type declaration '%s' at %L is not C "
4065 "interoperable but it is BIND(C)",
4066 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4067 else if (gfc_option
.warn_c_binding_type
)
4068 gfc_warning ("Variable '%s' at %L "
4069 "may not be a C interoperable "
4070 "kind but it is bind(c)",
4071 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4075 /* Variables declared w/in a common block can't be bind(c)
4076 since there's no way for C to see these variables, so there's
4077 semantically no reason for the attribute. */
4078 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
4080 gfc_error ("Variable '%s' in common block '%s' at "
4081 "%L cannot be declared with BIND(C) "
4082 "since it is not a global",
4083 tmp_sym
->name
, com_block
->name
,
4084 &(tmp_sym
->declared_at
));
4088 /* Scalar variables that are bind(c) can not have the pointer
4089 or allocatable attributes. */
4090 if (tmp_sym
->attr
.is_bind_c
== 1)
4092 if (tmp_sym
->attr
.pointer
== 1)
4094 gfc_error ("Variable '%s' at %L cannot have both the "
4095 "POINTER and BIND(C) attributes",
4096 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4100 if (tmp_sym
->attr
.allocatable
== 1)
4102 gfc_error ("Variable '%s' at %L cannot have both the "
4103 "ALLOCATABLE and BIND(C) attributes",
4104 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4110 /* If it is a BIND(C) function, make sure the return value is a
4111 scalar value. The previous tests in this function made sure
4112 the type is interoperable. */
4113 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
4114 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
4115 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
4117 /* BIND(C) functions can not return a character string. */
4118 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
4119 if (tmp_sym
->ts
.u
.cl
== NULL
|| tmp_sym
->ts
.u
.cl
->length
== NULL
4120 || tmp_sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
4121 || mpz_cmp_si (tmp_sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
4122 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
4123 "be a character string", tmp_sym
->name
,
4124 &(tmp_sym
->declared_at
));
4127 /* See if the symbol has been marked as private. If it has, make sure
4128 there is no binding label and warn the user if there is one. */
4129 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
4130 && tmp_sym
->binding_label
)
4131 /* Use gfc_warning_now because we won't say that the symbol fails
4132 just because of this. */
4133 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
4134 "given the binding label '%s'", tmp_sym
->name
,
4135 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
4141 /* Set the appropriate fields for a symbol that's been declared as
4142 BIND(C) (the is_bind_c flag and the binding label), and verify that
4143 the type is C interoperable. Errors are reported by the functions
4144 used to set/test these fields. */
4147 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
4151 /* TODO: Do we need to make sure the vars aren't marked private? */
4153 /* Set the is_bind_c bit in symbol_attribute. */
4154 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
4156 if (!set_binding_label (&tmp_sym
->binding_label
, tmp_sym
->name
, num_idents
))
4163 /* Set the fields marking the given common block as BIND(C), including
4164 a binding label, and report any errors encountered. */
4167 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
4171 /* destLabel, common name, typespec (which may have binding label). */
4172 if (!set_binding_label (&com_block
->binding_label
, com_block
->name
,
4176 /* Set the given common block (com_block) to being bind(c) (1). */
4177 set_com_block_bind_c (com_block
, 1);
4183 /* Retrieve the list of one or more identifiers that the given bind(c)
4184 attribute applies to. */
4187 get_bind_c_idents (void)
4189 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4191 gfc_symbol
*tmp_sym
= NULL
;
4193 gfc_common_head
*com_block
= NULL
;
4195 if (gfc_match_name (name
) == MATCH_YES
)
4197 found_id
= MATCH_YES
;
4198 gfc_get_ha_symbol (name
, &tmp_sym
);
4200 else if (match_common_name (name
) == MATCH_YES
)
4202 found_id
= MATCH_YES
;
4203 com_block
= gfc_get_common (name
, 0);
4207 gfc_error ("Need either entity or common block name for "
4208 "attribute specification statement at %C");
4212 /* Save the current identifier and look for more. */
4215 /* Increment the number of identifiers found for this spec stmt. */
4218 /* Make sure we have a sym or com block, and verify that it can
4219 be bind(c). Set the appropriate field(s) and look for more
4221 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
4223 if (tmp_sym
!= NULL
)
4225 if (!set_verify_bind_c_sym (tmp_sym
, num_idents
))
4230 if (!set_verify_bind_c_com_block (com_block
, num_idents
))
4234 /* Look to see if we have another identifier. */
4236 if (gfc_match_eos () == MATCH_YES
)
4237 found_id
= MATCH_NO
;
4238 else if (gfc_match_char (',') != MATCH_YES
)
4239 found_id
= MATCH_NO
;
4240 else if (gfc_match_name (name
) == MATCH_YES
)
4242 found_id
= MATCH_YES
;
4243 gfc_get_ha_symbol (name
, &tmp_sym
);
4245 else if (match_common_name (name
) == MATCH_YES
)
4247 found_id
= MATCH_YES
;
4248 com_block
= gfc_get_common (name
, 0);
4252 gfc_error ("Missing entity or common block name for "
4253 "attribute specification statement at %C");
4259 gfc_internal_error ("Missing symbol");
4261 } while (found_id
== MATCH_YES
);
4263 /* if we get here we were successful */
4268 /* Try and match a BIND(C) attribute specification statement. */
4271 gfc_match_bind_c_stmt (void)
4273 match found_match
= MATCH_NO
;
4278 /* This may not be necessary. */
4280 /* Clear the temporary binding label holder. */
4281 curr_binding_label
= NULL
;
4283 /* Look for the bind(c). */
4284 found_match
= gfc_match_bind_c (NULL
, true);
4286 if (found_match
== MATCH_YES
)
4288 if (!gfc_notify_std (GFC_STD_F2003
, "BIND(C) statement at %C"))
4291 /* Look for the :: now, but it is not required. */
4294 /* Get the identifier(s) that needs to be updated. This may need to
4295 change to hand the flag(s) for the attr specified so all identifiers
4296 found can have all appropriate parts updated (assuming that the same
4297 spec stmt can have multiple attrs, such as both bind(c) and
4299 if (!get_bind_c_idents ())
4300 /* Error message should have printed already. */
4308 /* Match a data declaration statement. */
4311 gfc_match_data_decl (void)
4317 num_idents_on_line
= 0;
4319 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4323 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4324 && gfc_current_state () != COMP_DERIVED
)
4326 sym
= gfc_use_derived (current_ts
.u
.derived
);
4334 current_ts
.u
.derived
= sym
;
4337 m
= match_attr_spec ();
4338 if (m
== MATCH_ERROR
)
4344 if (current_ts
.type
== BT_CLASS
4345 && current_ts
.u
.derived
->attr
.unlimited_polymorphic
)
4348 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4349 && current_ts
.u
.derived
->components
== NULL
4350 && !current_ts
.u
.derived
->attr
.zero_comp
)
4353 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
4356 gfc_find_symbol (current_ts
.u
.derived
->name
,
4357 current_ts
.u
.derived
->ns
, 1, &sym
);
4359 /* Any symbol that we find had better be a type definition
4360 which has its components defined. */
4361 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
4362 && (current_ts
.u
.derived
->components
!= NULL
4363 || current_ts
.u
.derived
->attr
.zero_comp
))
4366 gfc_error ("Derived type at %C has not been previously defined "
4367 "and so cannot appear in a derived type definition");
4373 /* If we have an old-style character declaration, and no new-style
4374 attribute specifications, then there a comma is optional between
4375 the type specification and the variable list. */
4376 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
4377 gfc_match_char (',');
4379 /* Give the types/attributes to symbols that follow. Give the element
4380 a number so that repeat character length expressions can be copied. */
4384 num_idents_on_line
++;
4385 m
= variable_decl (elem
++);
4386 if (m
== MATCH_ERROR
)
4391 if (gfc_match_eos () == MATCH_YES
)
4393 if (gfc_match_char (',') != MATCH_YES
)
4397 if (gfc_error_flag_test () == 0)
4398 gfc_error ("Syntax error in data declaration at %C");
4401 gfc_free_data_all (gfc_current_ns
);
4404 gfc_free_array_spec (current_as
);
4410 /* Match a prefix associated with a function or subroutine
4411 declaration. If the typespec pointer is nonnull, then a typespec
4412 can be matched. Note that if nothing matches, MATCH_YES is
4413 returned (the null string was matched). */
4416 gfc_match_prefix (gfc_typespec
*ts
)
4422 gfc_clear_attr (¤t_attr
);
4424 seen_impure
= false;
4426 gcc_assert (!gfc_matching_prefix
);
4427 gfc_matching_prefix
= true;
4431 found_prefix
= false;
4433 if (!seen_type
&& ts
!= NULL
4434 && gfc_match_decl_type_spec (ts
, 0) == MATCH_YES
4435 && gfc_match_space () == MATCH_YES
)
4439 found_prefix
= true;
4442 if (gfc_match ("elemental% ") == MATCH_YES
)
4444 if (!gfc_add_elemental (¤t_attr
, NULL
))
4447 found_prefix
= true;
4450 if (gfc_match ("pure% ") == MATCH_YES
)
4452 if (!gfc_add_pure (¤t_attr
, NULL
))
4455 found_prefix
= true;
4458 if (gfc_match ("recursive% ") == MATCH_YES
)
4460 if (!gfc_add_recursive (¤t_attr
, NULL
))
4463 found_prefix
= true;
4466 /* IMPURE is a somewhat special case, as it needs not set an actual
4467 attribute but rather only prevents ELEMENTAL routines from being
4468 automatically PURE. */
4469 if (gfc_match ("impure% ") == MATCH_YES
)
4471 if (!gfc_notify_std (GFC_STD_F2008
, "IMPURE procedure at %C"))
4475 found_prefix
= true;
4478 while (found_prefix
);
4480 /* IMPURE and PURE must not both appear, of course. */
4481 if (seen_impure
&& current_attr
.pure
)
4483 gfc_error ("PURE and IMPURE must not appear both at %C");
4487 /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */
4488 if (!seen_impure
&& current_attr
.elemental
&& !current_attr
.pure
)
4490 if (!gfc_add_pure (¤t_attr
, NULL
))
4494 /* At this point, the next item is not a prefix. */
4495 gcc_assert (gfc_matching_prefix
);
4496 gfc_matching_prefix
= false;
4500 gcc_assert (gfc_matching_prefix
);
4501 gfc_matching_prefix
= false;
4506 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
4509 copy_prefix (symbol_attribute
*dest
, locus
*where
)
4511 if (current_attr
.pure
&& !gfc_add_pure (dest
, where
))
4514 if (current_attr
.elemental
&& !gfc_add_elemental (dest
, where
))
4517 if (current_attr
.recursive
&& !gfc_add_recursive (dest
, where
))
4524 /* Match a formal argument list. */
4527 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
4529 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
4530 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4536 if (gfc_match_char ('(') != MATCH_YES
)
4543 if (gfc_match_char (')') == MATCH_YES
)
4548 if (gfc_match_char ('*') == MATCH_YES
)
4551 if (!gfc_notify_std (GFC_STD_F95_OBS
, "Alternate-return argument "
4560 m
= gfc_match_name (name
);
4564 if (gfc_get_symbol (name
, NULL
, &sym
))
4568 p
= gfc_get_formal_arglist ();
4580 /* We don't add the VARIABLE flavor because the name could be a
4581 dummy procedure. We don't apply these attributes to formal
4582 arguments of statement functions. */
4583 if (sym
!= NULL
&& !st_flag
4584 && (!gfc_add_dummy(&sym
->attr
, sym
->name
, NULL
)
4585 || !gfc_missing_attr (&sym
->attr
, NULL
)))
4591 /* The name of a program unit can be in a different namespace,
4592 so check for it explicitly. After the statement is accepted,
4593 the name is checked for especially in gfc_get_symbol(). */
4594 if (gfc_new_block
!= NULL
&& sym
!= NULL
4595 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
4597 gfc_error ("Name '%s' at %C is the name of the procedure",
4603 if (gfc_match_char (')') == MATCH_YES
)
4606 m
= gfc_match_char (',');
4609 gfc_error ("Unexpected junk in formal argument list at %C");
4615 /* Check for duplicate symbols in the formal argument list. */
4618 for (p
= head
; p
->next
; p
= p
->next
)
4623 for (q
= p
->next
; q
; q
= q
->next
)
4624 if (p
->sym
== q
->sym
)
4626 gfc_error ("Duplicate symbol '%s' in formal argument list "
4627 "at %C", p
->sym
->name
);
4635 if (!gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
))
4644 gfc_free_formal_arglist (head
);
4649 /* Match a RESULT specification following a function declaration or
4650 ENTRY statement. Also matches the end-of-statement. */
4653 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
4655 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4659 if (gfc_match (" result (") != MATCH_YES
)
4662 m
= gfc_match_name (name
);
4666 /* Get the right paren, and that's it because there could be the
4667 bind(c) attribute after the result clause. */
4668 if (gfc_match_char (')') != MATCH_YES
)
4670 /* TODO: should report the missing right paren here. */
4674 if (strcmp (function
->name
, name
) == 0)
4676 gfc_error ("RESULT variable at %C must be different than function name");
4680 if (gfc_get_symbol (name
, NULL
, &r
))
4683 if (!gfc_add_result (&r
->attr
, r
->name
, NULL
))
4692 /* Match a function suffix, which could be a combination of a result
4693 clause and BIND(C), either one, or neither. The draft does not
4694 require them to come in a specific order. */
4697 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4699 match is_bind_c
; /* Found bind(c). */
4700 match is_result
; /* Found result clause. */
4701 match found_match
; /* Status of whether we've found a good match. */
4702 char peek_char
; /* Character we're going to peek at. */
4703 bool allow_binding_name
;
4705 /* Initialize to having found nothing. */
4706 found_match
= MATCH_NO
;
4707 is_bind_c
= MATCH_NO
;
4708 is_result
= MATCH_NO
;
4710 /* Get the next char to narrow between result and bind(c). */
4711 gfc_gobble_whitespace ();
4712 peek_char
= gfc_peek_ascii_char ();
4714 /* C binding names are not allowed for internal procedures. */
4715 if (gfc_current_state () == COMP_CONTAINS
4716 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4717 allow_binding_name
= false;
4719 allow_binding_name
= true;
4724 /* Look for result clause. */
4725 is_result
= match_result (sym
, result
);
4726 if (is_result
== MATCH_YES
)
4728 /* Now see if there is a bind(c) after it. */
4729 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4730 /* We've found the result clause and possibly bind(c). */
4731 found_match
= MATCH_YES
;
4734 /* This should only be MATCH_ERROR. */
4735 found_match
= is_result
;
4738 /* Look for bind(c) first. */
4739 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4740 if (is_bind_c
== MATCH_YES
)
4742 /* Now see if a result clause followed it. */
4743 is_result
= match_result (sym
, result
);
4744 found_match
= MATCH_YES
;
4748 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4749 found_match
= MATCH_ERROR
;
4753 gfc_error ("Unexpected junk after function declaration at %C");
4754 found_match
= MATCH_ERROR
;
4758 if (is_bind_c
== MATCH_YES
)
4760 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4761 if (gfc_current_state () == COMP_CONTAINS
4762 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4763 && !gfc_notify_std (GFC_STD_F2008
, "BIND(C) attribute "
4764 "at %L may not be specified for an internal "
4765 "procedure", &gfc_current_locus
))
4768 if (!gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1))
4776 /* Procedure pointer return value without RESULT statement:
4777 Add "hidden" result variable named "ppr@". */
4780 add_hidden_procptr_result (gfc_symbol
*sym
)
4784 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4787 /* First usage case: PROCEDURE and EXTERNAL statements. */
4788 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4789 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4790 && sym
->attr
.external
;
4791 /* Second usage case: INTERFACE statements. */
4792 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4793 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4794 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4800 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4804 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4805 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4806 st2
->n
.sym
= stree
->n
.sym
;
4808 sym
->result
= stree
->n
.sym
;
4810 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4811 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4812 sym
->result
->attr
.external
= sym
->attr
.external
;
4813 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4814 sym
->result
->ts
= sym
->ts
;
4815 sym
->attr
.proc_pointer
= 0;
4816 sym
->attr
.pointer
= 0;
4817 sym
->attr
.external
= 0;
4818 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4820 sym
->result
->attr
.pointer
= 0;
4821 sym
->result
->attr
.proc_pointer
= 1;
4824 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4826 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4827 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4828 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4829 && sym
== gfc_current_ns
->proc_name
4830 && sym
== sym
->result
->ns
->proc_name
4831 && strcmp ("ppr@", sym
->result
->name
) == 0)
4833 sym
->result
->attr
.proc_pointer
= 1;
4834 sym
->attr
.pointer
= 0;
4842 /* Match the interface for a PROCEDURE declaration,
4843 including brackets (R1212). */
4846 match_procedure_interface (gfc_symbol
**proc_if
)
4850 locus old_loc
, entry_loc
;
4851 gfc_namespace
*old_ns
= gfc_current_ns
;
4852 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4854 old_loc
= entry_loc
= gfc_current_locus
;
4855 gfc_clear_ts (¤t_ts
);
4857 if (gfc_match (" (") != MATCH_YES
)
4859 gfc_current_locus
= entry_loc
;
4863 /* Get the type spec. for the procedure interface. */
4864 old_loc
= gfc_current_locus
;
4865 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4866 gfc_gobble_whitespace ();
4867 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4870 if (m
== MATCH_ERROR
)
4873 /* Procedure interface is itself a procedure. */
4874 gfc_current_locus
= old_loc
;
4875 m
= gfc_match_name (name
);
4877 /* First look to see if it is already accessible in the current
4878 namespace because it is use associated or contained. */
4880 if (gfc_find_sym_tree (name
, NULL
, 0, &st
))
4883 /* If it is still not found, then try the parent namespace, if it
4884 exists and create the symbol there if it is still not found. */
4885 if (gfc_current_ns
->parent
)
4886 gfc_current_ns
= gfc_current_ns
->parent
;
4887 if (st
== NULL
&& gfc_get_ha_sym_tree (name
, &st
))
4890 gfc_current_ns
= old_ns
;
4891 *proc_if
= st
->n
.sym
;
4896 /* Resolve interface if possible. That way, attr.procedure is only set
4897 if it is declared by a later procedure-declaration-stmt, which is
4898 invalid per F08:C1216 (cf. resolve_procedure_interface). */
4899 while ((*proc_if
)->ts
.interface
)
4900 *proc_if
= (*proc_if
)->ts
.interface
;
4902 if ((*proc_if
)->attr
.flavor
== FL_UNKNOWN
4903 && (*proc_if
)->ts
.type
== BT_UNKNOWN
4904 && !gfc_add_flavor (&(*proc_if
)->attr
, FL_PROCEDURE
,
4905 (*proc_if
)->name
, NULL
))
4910 if (gfc_match (" )") != MATCH_YES
)
4912 gfc_current_locus
= entry_loc
;
4920 /* Match a PROCEDURE declaration (R1211). */
4923 match_procedure_decl (void)
4926 gfc_symbol
*sym
, *proc_if
= NULL
;
4928 gfc_expr
*initializer
= NULL
;
4930 /* Parse interface (with brackets). */
4931 m
= match_procedure_interface (&proc_if
);
4935 /* Parse attributes (with colons). */
4936 m
= match_attr_spec();
4937 if (m
== MATCH_ERROR
)
4940 if (proc_if
&& proc_if
->attr
.is_bind_c
&& !current_attr
.is_bind_c
)
4942 current_attr
.is_bind_c
= 1;
4943 has_name_equals
= 0;
4944 curr_binding_label
= NULL
;
4947 /* Get procedure symbols. */
4950 m
= gfc_match_symbol (&sym
, 0);
4953 else if (m
== MATCH_ERROR
)
4956 /* Add current_attr to the symbol attributes. */
4957 if (!gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
))
4960 if (sym
->attr
.is_bind_c
)
4962 /* Check for C1218. */
4963 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4965 gfc_error ("BIND(C) attribute at %C requires "
4966 "an interface with BIND(C)");
4969 /* Check for C1217. */
4970 if (has_name_equals
&& sym
->attr
.pointer
)
4972 gfc_error ("BIND(C) procedure with NAME may not have "
4973 "POINTER attribute at %C");
4976 if (has_name_equals
&& sym
->attr
.dummy
)
4978 gfc_error ("Dummy procedure at %C may not have "
4979 "BIND(C) attribute with NAME");
4982 /* Set binding label for BIND(C). */
4983 if (!set_binding_label (&sym
->binding_label
, sym
->name
, num
))
4987 if (!gfc_add_external (&sym
->attr
, NULL
))
4990 if (add_hidden_procptr_result (sym
))
4993 if (!gfc_add_proc (&sym
->attr
, sym
->name
, NULL
))
4996 /* Set interface. */
4997 if (proc_if
!= NULL
)
4999 if (sym
->ts
.type
!= BT_UNKNOWN
)
5001 gfc_error ("Procedure '%s' at %L already has basic type of %s",
5002 sym
->name
, &gfc_current_locus
,
5003 gfc_basic_typename (sym
->ts
.type
));
5006 sym
->ts
.interface
= proc_if
;
5007 sym
->attr
.untyped
= 1;
5008 sym
->attr
.if_source
= IFSRC_IFBODY
;
5010 else if (current_ts
.type
!= BT_UNKNOWN
)
5012 if (!gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
))
5014 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
5015 sym
->ts
.interface
->ts
= current_ts
;
5016 sym
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
5017 sym
->ts
.interface
->attr
.function
= 1;
5018 sym
->attr
.function
= 1;
5019 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
5022 if (gfc_match (" =>") == MATCH_YES
)
5024 if (!current_attr
.pointer
)
5026 gfc_error ("Initialization at %C isn't for a pointer variable");
5031 m
= match_pointer_init (&initializer
, 1);
5035 if (!add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
))
5040 if (gfc_match_eos () == MATCH_YES
)
5042 if (gfc_match_char (',') != MATCH_YES
)
5047 gfc_error ("Syntax error in PROCEDURE statement at %C");
5051 /* Free stuff up and return. */
5052 gfc_free_expr (initializer
);
5058 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
5061 /* Match a procedure pointer component declaration (R445). */
5064 match_ppc_decl (void)
5067 gfc_symbol
*proc_if
= NULL
;
5071 gfc_expr
*initializer
= NULL
;
5072 gfc_typebound_proc
* tb
;
5073 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5075 /* Parse interface (with brackets). */
5076 m
= match_procedure_interface (&proc_if
);
5080 /* Parse attributes. */
5081 tb
= XCNEW (gfc_typebound_proc
);
5082 tb
->where
= gfc_current_locus
;
5083 m
= match_binding_attributes (tb
, false, true);
5084 if (m
== MATCH_ERROR
)
5087 gfc_clear_attr (¤t_attr
);
5088 current_attr
.procedure
= 1;
5089 current_attr
.proc_pointer
= 1;
5090 current_attr
.access
= tb
->access
;
5091 current_attr
.flavor
= FL_PROCEDURE
;
5093 /* Match the colons (required). */
5094 if (gfc_match (" ::") != MATCH_YES
)
5096 gfc_error ("Expected '::' after binding-attributes at %C");
5100 /* Check for C450. */
5101 if (!tb
->nopass
&& proc_if
== NULL
)
5103 gfc_error("NOPASS or explicit interface required at %C");
5107 if (!gfc_notify_std (GFC_STD_F2003
, "Procedure pointer component at %C"))
5110 /* Match PPC names. */
5114 m
= gfc_match_name (name
);
5117 else if (m
== MATCH_ERROR
)
5120 if (!gfc_add_component (gfc_current_block(), name
, &c
))
5123 /* Add current_attr to the symbol attributes. */
5124 if (!gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
))
5127 if (!gfc_add_external (&c
->attr
, NULL
))
5130 if (!gfc_add_proc (&c
->attr
, name
, NULL
))
5137 c
->tb
= XCNEW (gfc_typebound_proc
);
5138 c
->tb
->where
= gfc_current_locus
;
5142 /* Set interface. */
5143 if (proc_if
!= NULL
)
5145 c
->ts
.interface
= proc_if
;
5146 c
->attr
.untyped
= 1;
5147 c
->attr
.if_source
= IFSRC_IFBODY
;
5149 else if (ts
.type
!= BT_UNKNOWN
)
5152 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
5153 c
->ts
.interface
->result
= c
->ts
.interface
;
5154 c
->ts
.interface
->ts
= ts
;
5155 c
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
5156 c
->ts
.interface
->attr
.function
= 1;
5157 c
->attr
.function
= 1;
5158 c
->attr
.if_source
= IFSRC_UNKNOWN
;
5161 if (gfc_match (" =>") == MATCH_YES
)
5163 m
= match_pointer_init (&initializer
, 1);
5166 gfc_free_expr (initializer
);
5169 c
->initializer
= initializer
;
5172 if (gfc_match_eos () == MATCH_YES
)
5174 if (gfc_match_char (',') != MATCH_YES
)
5179 gfc_error ("Syntax error in procedure pointer component at %C");
5184 /* Match a PROCEDURE declaration inside an interface (R1206). */
5187 match_procedure_in_interface (void)
5191 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5194 if (current_interface
.type
== INTERFACE_NAMELESS
5195 || current_interface
.type
== INTERFACE_ABSTRACT
)
5197 gfc_error ("PROCEDURE at %C must be in a generic interface");
5201 /* Check if the F2008 optional double colon appears. */
5202 gfc_gobble_whitespace ();
5203 old_locus
= gfc_current_locus
;
5204 if (gfc_match ("::") == MATCH_YES
)
5206 if (!gfc_notify_std (GFC_STD_F2008
, "double colon in "
5207 "MODULE PROCEDURE statement at %L", &old_locus
))
5211 gfc_current_locus
= old_locus
;
5215 m
= gfc_match_name (name
);
5218 else if (m
== MATCH_ERROR
)
5220 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
5223 if (!gfc_add_interface (sym
))
5226 if (gfc_match_eos () == MATCH_YES
)
5228 if (gfc_match_char (',') != MATCH_YES
)
5235 gfc_error ("Syntax error in PROCEDURE statement at %C");
5240 /* General matcher for PROCEDURE declarations. */
5242 static match
match_procedure_in_type (void);
5245 gfc_match_procedure (void)
5249 switch (gfc_current_state ())
5254 case COMP_SUBROUTINE
:
5257 m
= match_procedure_decl ();
5259 case COMP_INTERFACE
:
5260 m
= match_procedure_in_interface ();
5263 m
= match_ppc_decl ();
5265 case COMP_DERIVED_CONTAINS
:
5266 m
= match_procedure_in_type ();
5275 if (!gfc_notify_std (GFC_STD_F2003
, "PROCEDURE statement at %C"))
5282 /* Warn if a matched procedure has the same name as an intrinsic; this is
5283 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
5284 parser-state-stack to find out whether we're in a module. */
5287 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
5291 in_module
= (gfc_state_stack
->previous
5292 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
5294 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
5298 /* Match a function declaration. */
5301 gfc_match_function_decl (void)
5303 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5304 gfc_symbol
*sym
, *result
;
5308 match found_match
; /* Status returned by match func. */
5310 if (gfc_current_state () != COMP_NONE
5311 && gfc_current_state () != COMP_INTERFACE
5312 && gfc_current_state () != COMP_CONTAINS
)
5315 gfc_clear_ts (¤t_ts
);
5317 old_loc
= gfc_current_locus
;
5319 m
= gfc_match_prefix (¤t_ts
);
5322 gfc_current_locus
= old_loc
;
5326 if (gfc_match ("function% %n", name
) != MATCH_YES
)
5328 gfc_current_locus
= old_loc
;
5331 if (get_proc_name (name
, &sym
, false))
5334 if (add_hidden_procptr_result (sym
))
5337 gfc_new_block
= sym
;
5339 m
= gfc_match_formal_arglist (sym
, 0, 0);
5342 gfc_error ("Expected formal argument list in function "
5343 "definition at %C");
5347 else if (m
== MATCH_ERROR
)
5352 /* According to the draft, the bind(c) and result clause can
5353 come in either order after the formal_arg_list (i.e., either
5354 can be first, both can exist together or by themselves or neither
5355 one). Therefore, the match_result can't match the end of the
5356 string, and check for the bind(c) or result clause in either order. */
5357 found_match
= gfc_match_eos ();
5359 /* Make sure that it isn't already declared as BIND(C). If it is, it
5360 must have been marked BIND(C) with a BIND(C) attribute and that is
5361 not allowed for procedures. */
5362 if (sym
->attr
.is_bind_c
== 1)
5364 sym
->attr
.is_bind_c
= 0;
5365 if (sym
->old_symbol
!= NULL
)
5366 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5367 "variables or common blocks",
5368 &(sym
->old_symbol
->declared_at
));
5370 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5371 "variables or common blocks", &gfc_current_locus
);
5374 if (found_match
!= MATCH_YES
)
5376 /* If we haven't found the end-of-statement, look for a suffix. */
5377 suffix_match
= gfc_match_suffix (sym
, &result
);
5378 if (suffix_match
== MATCH_YES
)
5379 /* Need to get the eos now. */
5380 found_match
= gfc_match_eos ();
5382 found_match
= suffix_match
;
5385 if(found_match
!= MATCH_YES
)
5389 /* Make changes to the symbol. */
5392 if (!gfc_add_function (&sym
->attr
, sym
->name
, NULL
))
5395 if (!gfc_missing_attr (&sym
->attr
, NULL
)
5396 || !copy_prefix (&sym
->attr
, &sym
->declared_at
))
5399 /* Delay matching the function characteristics until after the
5400 specification block by signalling kind=-1. */
5401 sym
->declared_at
= old_loc
;
5402 if (current_ts
.type
!= BT_UNKNOWN
)
5403 current_ts
.kind
= -1;
5405 current_ts
.kind
= 0;
5409 if (current_ts
.type
!= BT_UNKNOWN
5410 && !gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
))
5416 if (current_ts
.type
!= BT_UNKNOWN
5417 && !gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
))
5419 sym
->result
= result
;
5422 /* Warn if this procedure has the same name as an intrinsic. */
5423 warn_intrinsic_shadow (sym
, true);
5429 gfc_current_locus
= old_loc
;
5434 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
5435 pass the name of the entry, rather than the gfc_current_block name, and
5436 to return false upon finding an existing global entry. */
5439 add_global_entry (const char *name
, const char *binding_label
, bool sub
,
5443 enum gfc_symbol_type type
;
5445 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
5447 /* Only in Fortran 2003: For procedures with a binding label also the Fortran
5448 name is a global identifier. */
5449 if (!binding_label
|| gfc_notification_std (GFC_STD_F2008
))
5451 s
= gfc_get_gsymbol (name
);
5453 if (s
->defined
|| (s
->type
!= GSYM_UNKNOWN
&& s
->type
!= type
))
5455 gfc_global_used (s
, where
);
5464 s
->ns
= gfc_current_ns
;
5468 /* Don't add the symbol multiple times. */
5470 && (!gfc_notification_std (GFC_STD_F2008
)
5471 || strcmp (name
, binding_label
) != 0))
5473 s
= gfc_get_gsymbol (binding_label
);
5475 if (s
->defined
|| (s
->type
!= GSYM_UNKNOWN
&& s
->type
!= type
))
5477 gfc_global_used (s
, where
);
5484 s
->binding_label
= binding_label
;
5487 s
->ns
= gfc_current_ns
;
5495 /* Match an ENTRY statement. */
5498 gfc_match_entry (void)
5503 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5504 gfc_compile_state state
;
5508 bool module_procedure
;
5512 m
= gfc_match_name (name
);
5516 if (!gfc_notify_std (GFC_STD_F2008_OBS
, "ENTRY statement at %C"))
5519 state
= gfc_current_state ();
5520 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
5525 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
5528 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
5530 case COMP_BLOCK_DATA
:
5531 gfc_error ("ENTRY statement at %C cannot appear within "
5534 case COMP_INTERFACE
:
5535 gfc_error ("ENTRY statement at %C cannot appear within "
5539 gfc_error ("ENTRY statement at %C cannot appear within "
5540 "a DERIVED TYPE block");
5543 gfc_error ("ENTRY statement at %C cannot appear within "
5544 "an IF-THEN block");
5547 case COMP_DO_CONCURRENT
:
5548 gfc_error ("ENTRY statement at %C cannot appear within "
5552 gfc_error ("ENTRY statement at %C cannot appear within "
5556 gfc_error ("ENTRY statement at %C cannot appear within "
5560 gfc_error ("ENTRY statement at %C cannot appear within "
5564 gfc_error ("ENTRY statement at %C cannot appear within "
5565 "a contained subprogram");
5568 gfc_internal_error ("gfc_match_entry(): Bad state");
5573 module_procedure
= gfc_current_ns
->parent
!= NULL
5574 && gfc_current_ns
->parent
->proc_name
5575 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
5578 if (gfc_current_ns
->parent
!= NULL
5579 && gfc_current_ns
->parent
->proc_name
5580 && !module_procedure
)
5582 gfc_error("ENTRY statement at %C cannot appear in a "
5583 "contained procedure");
5587 /* Module function entries need special care in get_proc_name
5588 because previous references within the function will have
5589 created symbols attached to the current namespace. */
5590 if (get_proc_name (name
, &entry
,
5591 gfc_current_ns
->parent
!= NULL
5592 && module_procedure
))
5595 proc
= gfc_current_block ();
5597 /* Make sure that it isn't already declared as BIND(C). If it is, it
5598 must have been marked BIND(C) with a BIND(C) attribute and that is
5599 not allowed for procedures. */
5600 if (entry
->attr
.is_bind_c
== 1)
5602 entry
->attr
.is_bind_c
= 0;
5603 if (entry
->old_symbol
!= NULL
)
5604 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5605 "variables or common blocks",
5606 &(entry
->old_symbol
->declared_at
));
5608 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5609 "variables or common blocks", &gfc_current_locus
);
5612 /* Check what next non-whitespace character is so we can tell if there
5613 is the required parens if we have a BIND(C). */
5614 old_loc
= gfc_current_locus
;
5615 gfc_gobble_whitespace ();
5616 peek_char
= gfc_peek_ascii_char ();
5618 if (state
== COMP_SUBROUTINE
)
5620 m
= gfc_match_formal_arglist (entry
, 0, 1);
5624 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5625 never be an internal procedure. */
5626 is_bind_c
= gfc_match_bind_c (entry
, true);
5627 if (is_bind_c
== MATCH_ERROR
)
5629 if (is_bind_c
== MATCH_YES
)
5631 if (peek_char
!= '(')
5633 gfc_error ("Missing required parentheses before BIND(C) at %C");
5636 if (!gfc_add_is_bind_c (&(entry
->attr
), entry
->name
,
5637 &(entry
->declared_at
), 1))
5641 if (!gfc_current_ns
->parent
5642 && !add_global_entry (name
, entry
->binding_label
, true,
5646 /* An entry in a subroutine. */
5647 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5648 || !gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
))
5653 /* An entry in a function.
5654 We need to take special care because writing
5659 ENTRY f() RESULT (r)
5661 ENTRY f RESULT (r). */
5662 if (gfc_match_eos () == MATCH_YES
)
5664 gfc_current_locus
= old_loc
;
5665 /* Match the empty argument list, and add the interface to
5667 m
= gfc_match_formal_arglist (entry
, 0, 1);
5670 m
= gfc_match_formal_arglist (entry
, 0, 0);
5677 if (gfc_match_eos () == MATCH_YES
)
5679 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5680 || !gfc_add_function (&entry
->attr
, entry
->name
, NULL
))
5683 entry
->result
= entry
;
5687 m
= gfc_match_suffix (entry
, &result
);
5689 gfc_syntax_error (ST_ENTRY
);
5695 if (!gfc_add_result (&result
->attr
, result
->name
, NULL
)
5696 || !gfc_add_entry (&entry
->attr
, result
->name
, NULL
)
5697 || !gfc_add_function (&entry
->attr
, result
->name
, NULL
))
5699 entry
->result
= result
;
5703 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5704 || !gfc_add_function (&entry
->attr
, entry
->name
, NULL
))
5706 entry
->result
= entry
;
5710 if (!gfc_current_ns
->parent
5711 && !add_global_entry (name
, entry
->binding_label
, false,
5716 if (gfc_match_eos () != MATCH_YES
)
5718 gfc_syntax_error (ST_ENTRY
);
5722 entry
->attr
.recursive
= proc
->attr
.recursive
;
5723 entry
->attr
.elemental
= proc
->attr
.elemental
;
5724 entry
->attr
.pure
= proc
->attr
.pure
;
5726 el
= gfc_get_entry_list ();
5728 el
->next
= gfc_current_ns
->entries
;
5729 gfc_current_ns
->entries
= el
;
5731 el
->id
= el
->next
->id
+ 1;
5735 new_st
.op
= EXEC_ENTRY
;
5736 new_st
.ext
.entry
= el
;
5742 /* Match a subroutine statement, including optional prefixes. */
5745 gfc_match_subroutine (void)
5747 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5752 bool allow_binding_name
;
5754 if (gfc_current_state () != COMP_NONE
5755 && gfc_current_state () != COMP_INTERFACE
5756 && gfc_current_state () != COMP_CONTAINS
)
5759 m
= gfc_match_prefix (NULL
);
5763 m
= gfc_match ("subroutine% %n", name
);
5767 if (get_proc_name (name
, &sym
, false))
5770 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5771 the symbol existed before. */
5772 sym
->declared_at
= gfc_current_locus
;
5774 if (add_hidden_procptr_result (sym
))
5777 gfc_new_block
= sym
;
5779 /* Check what next non-whitespace character is so we can tell if there
5780 is the required parens if we have a BIND(C). */
5781 gfc_gobble_whitespace ();
5782 peek_char
= gfc_peek_ascii_char ();
5784 if (!gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
))
5787 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5790 /* Make sure that it isn't already declared as BIND(C). If it is, it
5791 must have been marked BIND(C) with a BIND(C) attribute and that is
5792 not allowed for procedures. */
5793 if (sym
->attr
.is_bind_c
== 1)
5795 sym
->attr
.is_bind_c
= 0;
5796 if (sym
->old_symbol
!= NULL
)
5797 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5798 "variables or common blocks",
5799 &(sym
->old_symbol
->declared_at
));
5801 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5802 "variables or common blocks", &gfc_current_locus
);
5805 /* C binding names are not allowed for internal procedures. */
5806 if (gfc_current_state () == COMP_CONTAINS
5807 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5808 allow_binding_name
= false;
5810 allow_binding_name
= true;
5812 /* Here, we are just checking if it has the bind(c) attribute, and if
5813 so, then we need to make sure it's all correct. If it doesn't,
5814 we still need to continue matching the rest of the subroutine line. */
5815 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5816 if (is_bind_c
== MATCH_ERROR
)
5818 /* There was an attempt at the bind(c), but it was wrong. An
5819 error message should have been printed w/in the gfc_match_bind_c
5820 so here we'll just return the MATCH_ERROR. */
5824 if (is_bind_c
== MATCH_YES
)
5826 /* The following is allowed in the Fortran 2008 draft. */
5827 if (gfc_current_state () == COMP_CONTAINS
5828 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5829 && !gfc_notify_std (GFC_STD_F2008
, "BIND(C) attribute "
5830 "at %L may not be specified for an internal "
5831 "procedure", &gfc_current_locus
))
5834 if (peek_char
!= '(')
5836 gfc_error ("Missing required parentheses before BIND(C) at %C");
5839 if (!gfc_add_is_bind_c (&(sym
->attr
), sym
->name
,
5840 &(sym
->declared_at
), 1))
5844 if (gfc_match_eos () != MATCH_YES
)
5846 gfc_syntax_error (ST_SUBROUTINE
);
5850 if (!copy_prefix (&sym
->attr
, &sym
->declared_at
))
5853 /* Warn if it has the same name as an intrinsic. */
5854 warn_intrinsic_shadow (sym
, false);
5860 /* Check that the NAME identifier in a BIND attribute or statement
5861 is conform to C identifier rules. */
5864 check_bind_name_identifier (char **name
)
5866 char *n
= *name
, *p
;
5868 /* Remove leading spaces. */
5872 /* On an empty string, free memory and set name to NULL. */
5880 /* Remove trailing spaces. */
5881 p
= n
+ strlen(n
) - 1;
5885 /* Insert the identifier into the symbol table. */
5890 /* Now check that identifier is valid under C rules. */
5893 gfc_error ("Invalid C identifier in NAME= specifier at %C");
5898 if (!(ISALNUM (*p
) || *p
== '_' || *p
== '$'))
5900 gfc_error ("Invalid C identifier in NAME= specifier at %C");
5908 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5909 given, and set the binding label in either the given symbol (if not
5910 NULL), or in the current_ts. The symbol may be NULL because we may
5911 encounter the BIND(C) before the declaration itself. Return
5912 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5913 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5914 or MATCH_YES if the specifier was correct and the binding label and
5915 bind(c) fields were set correctly for the given symbol or the
5916 current_ts. If allow_binding_name is false, no binding name may be
5920 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5922 char *binding_label
= NULL
;
5925 /* Initialize the flag that specifies whether we encountered a NAME=
5926 specifier or not. */
5927 has_name_equals
= 0;
5929 /* This much we have to be able to match, in this order, if
5930 there is a bind(c) label. */
5931 if (gfc_match (" bind ( c ") != MATCH_YES
)
5934 /* Now see if there is a binding label, or if we've reached the
5935 end of the bind(c) attribute without one. */
5936 if (gfc_match_char (',') == MATCH_YES
)
5938 if (gfc_match (" name = ") != MATCH_YES
)
5940 gfc_error ("Syntax error in NAME= specifier for binding label "
5942 /* should give an error message here */
5946 has_name_equals
= 1;
5948 if (gfc_match_init_expr (&e
) != MATCH_YES
)
5954 if (!gfc_simplify_expr(e
, 0))
5956 gfc_error ("NAME= specifier at %C should be a constant expression");
5961 if (e
->expr_type
!= EXPR_CONSTANT
|| e
->ts
.type
!= BT_CHARACTER
5962 || e
->ts
.kind
!= gfc_default_character_kind
|| e
->rank
!= 0)
5964 gfc_error ("NAME= specifier at %C should be a scalar of "
5965 "default character kind");
5970 // Get a C string from the Fortran string constant
5971 binding_label
= gfc_widechar_to_char (e
->value
.character
.string
,
5972 e
->value
.character
.length
);
5975 // Check that it is valid (old gfc_match_name_C)
5976 if (check_bind_name_identifier (&binding_label
) != MATCH_YES
)
5980 /* Get the required right paren. */
5981 if (gfc_match_char (')') != MATCH_YES
)
5983 gfc_error ("Missing closing paren for binding label at %C");
5987 if (has_name_equals
&& !allow_binding_name
)
5989 gfc_error ("No binding name is allowed in BIND(C) at %C");
5993 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5995 gfc_error ("For dummy procedure %s, no binding name is "
5996 "allowed in BIND(C) at %C", sym
->name
);
6001 /* Save the binding label to the symbol. If sym is null, we're
6002 probably matching the typespec attributes of a declaration and
6003 haven't gotten the name yet, and therefore, no symbol yet. */
6007 sym
->binding_label
= binding_label
;
6009 curr_binding_label
= binding_label
;
6011 else if (allow_binding_name
)
6013 /* No binding label, but if symbol isn't null, we
6014 can set the label for it here.
6015 If name="" or allow_binding_name is false, no C binding name is
6017 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
6018 sym
->binding_label
= IDENTIFIER_POINTER (get_identifier (sym
->name
));
6021 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
6022 && current_interface
.type
== INTERFACE_ABSTRACT
)
6024 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
6032 /* Return nonzero if we're currently compiling a contained procedure. */
6035 contained_procedure (void)
6037 gfc_state_data
*s
= gfc_state_stack
;
6039 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
6040 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
6046 /* Set the kind of each enumerator. The kind is selected such that it is
6047 interoperable with the corresponding C enumeration type, making
6048 sure that -fshort-enums is honored. */
6053 enumerator_history
*current_history
= NULL
;
6057 if (max_enum
== NULL
|| enum_history
== NULL
)
6060 if (!flag_short_enums
)
6066 kind
= gfc_integer_kinds
[i
++].kind
;
6068 while (kind
< gfc_c_int_kind
6069 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
6072 current_history
= enum_history
;
6073 while (current_history
!= NULL
)
6075 current_history
->sym
->ts
.kind
= kind
;
6076 current_history
= current_history
->next
;
6081 /* Match any of the various end-block statements. Returns the type of
6082 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
6083 and END BLOCK statements cannot be replaced by a single END statement. */
6086 gfc_match_end (gfc_statement
*st
)
6088 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6089 gfc_compile_state state
;
6091 const char *block_name
;
6095 gfc_namespace
*parent_ns
, *ns
, *prev_ns
;
6096 gfc_namespace
**nsp
;
6098 old_loc
= gfc_current_locus
;
6099 if (gfc_match ("end") != MATCH_YES
)
6102 state
= gfc_current_state ();
6103 block_name
= gfc_current_block () == NULL
6104 ? NULL
: gfc_current_block ()->name
;
6108 case COMP_ASSOCIATE
:
6110 if (!strncmp (block_name
, "block@", strlen("block@")))
6115 case COMP_DERIVED_CONTAINS
:
6116 state
= gfc_state_stack
->previous
->state
;
6117 block_name
= gfc_state_stack
->previous
->sym
== NULL
6118 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
6129 *st
= ST_END_PROGRAM
;
6130 target
= " program";
6134 case COMP_SUBROUTINE
:
6135 *st
= ST_END_SUBROUTINE
;
6136 target
= " subroutine";
6137 eos_ok
= !contained_procedure ();
6141 *st
= ST_END_FUNCTION
;
6142 target
= " function";
6143 eos_ok
= !contained_procedure ();
6146 case COMP_BLOCK_DATA
:
6147 *st
= ST_END_BLOCK_DATA
;
6148 target
= " block data";
6153 *st
= ST_END_MODULE
;
6158 case COMP_INTERFACE
:
6159 *st
= ST_END_INTERFACE
;
6160 target
= " interface";
6165 case COMP_DERIVED_CONTAINS
:
6171 case COMP_ASSOCIATE
:
6172 *st
= ST_END_ASSOCIATE
;
6173 target
= " associate";
6190 case COMP_DO_CONCURRENT
:
6197 *st
= ST_END_CRITICAL
;
6198 target
= " critical";
6203 case COMP_SELECT_TYPE
:
6204 *st
= ST_END_SELECT
;
6210 *st
= ST_END_FORALL
;
6225 last_initializer
= NULL
;
6227 gfc_free_enum_history ();
6231 gfc_error ("Unexpected END statement at %C");
6235 old_loc
= gfc_current_locus
;
6236 if (gfc_match_eos () == MATCH_YES
)
6238 if (!eos_ok
&& (*st
== ST_END_SUBROUTINE
|| *st
== ST_END_FUNCTION
))
6240 if (!gfc_notify_std (GFC_STD_F2008
, "END statement "
6241 "instead of %s statement at %L",
6242 gfc_ascii_statement(*st
), &old_loc
))
6247 /* We would have required END [something]. */
6248 gfc_error ("%s statement expected at %L",
6249 gfc_ascii_statement (*st
), &old_loc
);
6256 /* Verify that we've got the sort of end-block that we're expecting. */
6257 if (gfc_match (target
) != MATCH_YES
)
6259 gfc_error ("Expecting %s statement at %L", gfc_ascii_statement (*st
),
6264 old_loc
= gfc_current_locus
;
6265 /* If we're at the end, make sure a block name wasn't required. */
6266 if (gfc_match_eos () == MATCH_YES
)
6269 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
6270 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
&& *st
!= ST_END_BLOCK
6271 && *st
!= ST_END_ASSOCIATE
&& *st
!= ST_END_CRITICAL
)
6277 gfc_error ("Expected block name of '%s' in %s statement at %L",
6278 block_name
, gfc_ascii_statement (*st
), &old_loc
);
6283 /* END INTERFACE has a special handler for its several possible endings. */
6284 if (*st
== ST_END_INTERFACE
)
6285 return gfc_match_end_interface ();
6287 /* We haven't hit the end of statement, so what is left must be an
6289 m
= gfc_match_space ();
6291 m
= gfc_match_name (name
);
6294 gfc_error ("Expected terminating name at %C");
6298 if (block_name
== NULL
)
6301 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
6303 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
6304 gfc_ascii_statement (*st
));
6307 /* Procedure pointer as function result. */
6308 else if (strcmp (block_name
, "ppr@") == 0
6309 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
6311 gfc_error ("Expected label '%s' for %s statement at %C",
6312 gfc_current_block ()->ns
->proc_name
->name
,
6313 gfc_ascii_statement (*st
));
6317 if (gfc_match_eos () == MATCH_YES
)
6321 gfc_syntax_error (*st
);
6324 gfc_current_locus
= old_loc
;
6326 /* If we are missing an END BLOCK, we created a half-ready namespace.
6327 Remove it from the parent namespace's sibling list. */
6329 if (state
== COMP_BLOCK
)
6331 parent_ns
= gfc_current_ns
->parent
;
6333 nsp
= &(gfc_state_stack
->previous
->tail
->ext
.block
.ns
);
6339 if (ns
== gfc_current_ns
)
6341 if (prev_ns
== NULL
)
6344 prev_ns
->sibling
= ns
->sibling
;
6350 gfc_free_namespace (gfc_current_ns
);
6351 gfc_current_ns
= parent_ns
;
6359 /***************** Attribute declaration statements ****************/
6361 /* Set the attribute of a single variable. */
6366 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6374 m
= gfc_match_name (name
);
6378 if (find_special (name
, &sym
, false))
6381 if (!check_function_name (name
))
6387 var_locus
= gfc_current_locus
;
6389 /* Deal with possible array specification for certain attributes. */
6390 if (current_attr
.dimension
6391 || current_attr
.codimension
6392 || current_attr
.allocatable
6393 || current_attr
.pointer
6394 || current_attr
.target
)
6396 m
= gfc_match_array_spec (&as
, !current_attr
.codimension
,
6397 !current_attr
.dimension
6398 && !current_attr
.pointer
6399 && !current_attr
.target
);
6400 if (m
== MATCH_ERROR
)
6403 if (current_attr
.dimension
&& m
== MATCH_NO
)
6405 gfc_error ("Missing array specification at %L in DIMENSION "
6406 "statement", &var_locus
);
6411 if (current_attr
.dimension
&& sym
->value
)
6413 gfc_error ("Dimensions specified for %s at %L after its "
6414 "initialisation", sym
->name
, &var_locus
);
6419 if (current_attr
.codimension
&& m
== MATCH_NO
)
6421 gfc_error ("Missing array specification at %L in CODIMENSION "
6422 "statement", &var_locus
);
6427 if ((current_attr
.allocatable
|| current_attr
.pointer
)
6428 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
6430 gfc_error ("Array specification must be deferred at %L", &var_locus
);
6436 /* Update symbol table. DIMENSION attribute is set in
6437 gfc_set_array_spec(). For CLASS variables, this must be applied
6438 to the first component, or '_data' field. */
6439 if (sym
->ts
.type
== BT_CLASS
&& sym
->ts
.u
.derived
->attr
.is_class
)
6441 if (!gfc_copy_attr (&CLASS_DATA(sym
)->attr
, ¤t_attr
, &var_locus
))
6449 if (current_attr
.dimension
== 0 && current_attr
.codimension
== 0
6450 && !gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
))
6457 if (sym
->ts
.type
== BT_CLASS
6458 && !gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
))
6464 if (!gfc_set_array_spec (sym
, as
, &var_locus
))
6470 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
6472 /* Fix the array spec. */
6473 m
= gfc_mod_pointee_as (sym
->as
);
6474 if (m
== MATCH_ERROR
)
6478 if (!gfc_add_attribute (&sym
->attr
, &var_locus
))
6484 if ((current_attr
.external
|| current_attr
.intrinsic
)
6485 && sym
->attr
.flavor
!= FL_PROCEDURE
6486 && !gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
))
6492 add_hidden_procptr_result (sym
);
6497 gfc_free_array_spec (as
);
6502 /* Generic attribute declaration subroutine. Used for attributes that
6503 just have a list of names. */
6510 /* Gobble the optional double colon, by simply ignoring the result
6520 if (gfc_match_eos () == MATCH_YES
)
6526 if (gfc_match_char (',') != MATCH_YES
)
6528 gfc_error ("Unexpected character in variable list at %C");
6538 /* This routine matches Cray Pointer declarations of the form:
6539 pointer ( <pointer>, <pointee> )
6541 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
6542 The pointer, if already declared, should be an integer. Otherwise, we
6543 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
6544 be either a scalar, or an array declaration. No space is allocated for
6545 the pointee. For the statement
6546 pointer (ipt, ar(10))
6547 any subsequent uses of ar will be translated (in C-notation) as
6548 ar(i) => ((<type> *) ipt)(i)
6549 After gimplification, pointee variable will disappear in the code. */
6552 cray_pointer_decl (void)
6555 gfc_array_spec
*as
= NULL
;
6556 gfc_symbol
*cptr
; /* Pointer symbol. */
6557 gfc_symbol
*cpte
; /* Pointee symbol. */
6563 if (gfc_match_char ('(') != MATCH_YES
)
6565 gfc_error ("Expected '(' at %C");
6569 /* Match pointer. */
6570 var_locus
= gfc_current_locus
;
6571 gfc_clear_attr (¤t_attr
);
6572 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
6573 current_ts
.type
= BT_INTEGER
;
6574 current_ts
.kind
= gfc_index_integer_kind
;
6576 m
= gfc_match_symbol (&cptr
, 0);
6579 gfc_error ("Expected variable name at %C");
6583 if (!gfc_add_cray_pointer (&cptr
->attr
, &var_locus
))
6586 gfc_set_sym_referenced (cptr
);
6588 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
6590 cptr
->ts
.type
= BT_INTEGER
;
6591 cptr
->ts
.kind
= gfc_index_integer_kind
;
6593 else if (cptr
->ts
.type
!= BT_INTEGER
)
6595 gfc_error ("Cray pointer at %C must be an integer");
6598 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
6599 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
6600 " memory addresses require %d bytes",
6601 cptr
->ts
.kind
, gfc_index_integer_kind
);
6603 if (gfc_match_char (',') != MATCH_YES
)
6605 gfc_error ("Expected \",\" at %C");
6609 /* Match Pointee. */
6610 var_locus
= gfc_current_locus
;
6611 gfc_clear_attr (¤t_attr
);
6612 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
6613 current_ts
.type
= BT_UNKNOWN
;
6614 current_ts
.kind
= 0;
6616 m
= gfc_match_symbol (&cpte
, 0);
6619 gfc_error ("Expected variable name at %C");
6623 /* Check for an optional array spec. */
6624 m
= gfc_match_array_spec (&as
, true, false);
6625 if (m
== MATCH_ERROR
)
6627 gfc_free_array_spec (as
);
6630 else if (m
== MATCH_NO
)
6632 gfc_free_array_spec (as
);
6636 if (!gfc_add_cray_pointee (&cpte
->attr
, &var_locus
))
6639 gfc_set_sym_referenced (cpte
);
6641 if (cpte
->as
== NULL
)
6643 if (!gfc_set_array_spec (cpte
, as
, &var_locus
))
6644 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6646 else if (as
!= NULL
)
6648 gfc_error ("Duplicate array spec for Cray pointee at %C");
6649 gfc_free_array_spec (as
);
6655 if (cpte
->as
!= NULL
)
6657 /* Fix array spec. */
6658 m
= gfc_mod_pointee_as (cpte
->as
);
6659 if (m
== MATCH_ERROR
)
6663 /* Point the Pointee at the Pointer. */
6664 cpte
->cp_pointer
= cptr
;
6666 if (gfc_match_char (')') != MATCH_YES
)
6668 gfc_error ("Expected \")\" at %C");
6671 m
= gfc_match_char (',');
6673 done
= true; /* Stop searching for more declarations. */
6677 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
6678 || gfc_match_eos () != MATCH_YES
)
6680 gfc_error ("Expected \",\" or end of statement at %C");
6688 gfc_match_external (void)
6691 gfc_clear_attr (¤t_attr
);
6692 current_attr
.external
= 1;
6694 return attr_decl ();
6699 gfc_match_intent (void)
6703 /* This is not allowed within a BLOCK construct! */
6704 if (gfc_current_state () == COMP_BLOCK
)
6706 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6710 intent
= match_intent_spec ();
6711 if (intent
== INTENT_UNKNOWN
)
6714 gfc_clear_attr (¤t_attr
);
6715 current_attr
.intent
= intent
;
6717 return attr_decl ();
6722 gfc_match_intrinsic (void)
6725 gfc_clear_attr (¤t_attr
);
6726 current_attr
.intrinsic
= 1;
6728 return attr_decl ();
6733 gfc_match_optional (void)
6735 /* This is not allowed within a BLOCK construct! */
6736 if (gfc_current_state () == COMP_BLOCK
)
6738 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6742 gfc_clear_attr (¤t_attr
);
6743 current_attr
.optional
= 1;
6745 return attr_decl ();
6750 gfc_match_pointer (void)
6752 gfc_gobble_whitespace ();
6753 if (gfc_peek_ascii_char () == '(')
6755 if (!gfc_option
.flag_cray_pointer
)
6757 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6761 return cray_pointer_decl ();
6765 gfc_clear_attr (¤t_attr
);
6766 current_attr
.pointer
= 1;
6768 return attr_decl ();
6774 gfc_match_allocatable (void)
6776 gfc_clear_attr (¤t_attr
);
6777 current_attr
.allocatable
= 1;
6779 return attr_decl ();
6784 gfc_match_codimension (void)
6786 gfc_clear_attr (¤t_attr
);
6787 current_attr
.codimension
= 1;
6789 return attr_decl ();
6794 gfc_match_contiguous (void)
6796 if (!gfc_notify_std (GFC_STD_F2008
, "CONTIGUOUS statement at %C"))
6799 gfc_clear_attr (¤t_attr
);
6800 current_attr
.contiguous
= 1;
6802 return attr_decl ();
6807 gfc_match_dimension (void)
6809 gfc_clear_attr (¤t_attr
);
6810 current_attr
.dimension
= 1;
6812 return attr_decl ();
6817 gfc_match_target (void)
6819 gfc_clear_attr (¤t_attr
);
6820 current_attr
.target
= 1;
6822 return attr_decl ();
6826 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6830 access_attr_decl (gfc_statement st
)
6832 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6833 interface_type type
;
6835 gfc_symbol
*sym
, *dt_sym
;
6836 gfc_intrinsic_op op
;
6839 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6844 m
= gfc_match_generic_spec (&type
, name
, &op
);
6847 if (m
== MATCH_ERROR
)
6852 case INTERFACE_NAMELESS
:
6853 case INTERFACE_ABSTRACT
:
6856 case INTERFACE_GENERIC
:
6857 if (gfc_get_symbol (name
, NULL
, &sym
))
6860 if (!gfc_add_access (&sym
->attr
,
6862 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
6866 if (sym
->attr
.generic
&& (dt_sym
= gfc_find_dt_in_generic (sym
))
6867 && !gfc_add_access (&dt_sym
->attr
,
6869 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
6875 case INTERFACE_INTRINSIC_OP
:
6876 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
6878 gfc_intrinsic_op other_op
;
6880 gfc_current_ns
->operator_access
[op
] =
6881 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6883 /* Handle the case if there is another op with the same
6884 function, for INTRINSIC_EQ vs. INTRINSIC_EQ_OS and so on. */
6885 other_op
= gfc_equivalent_op (op
);
6887 if (other_op
!= INTRINSIC_NONE
)
6888 gfc_current_ns
->operator_access
[other_op
] =
6889 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6894 gfc_error ("Access specification of the %s operator at %C has "
6895 "already been specified", gfc_op2string (op
));
6901 case INTERFACE_USER_OP
:
6902 uop
= gfc_get_uop (name
);
6904 if (uop
->access
== ACCESS_UNKNOWN
)
6906 uop
->access
= (st
== ST_PUBLIC
)
6907 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6911 gfc_error ("Access specification of the .%s. operator at %C "
6912 "has already been specified", sym
->name
);
6919 if (gfc_match_char (',') == MATCH_NO
)
6923 if (gfc_match_eos () != MATCH_YES
)
6928 gfc_syntax_error (st
);
6936 gfc_match_protected (void)
6941 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6943 gfc_error ("PROTECTED at %C only allowed in specification "
6944 "part of a module");
6949 if (!gfc_notify_std (GFC_STD_F2003
, "PROTECTED statement at %C"))
6952 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6957 if (gfc_match_eos () == MATCH_YES
)
6962 m
= gfc_match_symbol (&sym
, 0);
6966 if (!gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
))
6978 if (gfc_match_eos () == MATCH_YES
)
6980 if (gfc_match_char (',') != MATCH_YES
)
6987 gfc_error ("Syntax error in PROTECTED statement at %C");
6992 /* The PRIVATE statement is a bit weird in that it can be an attribute
6993 declaration, but also works as a standalone statement inside of a
6994 type declaration or a module. */
6997 gfc_match_private (gfc_statement
*st
)
7000 if (gfc_match ("private") != MATCH_YES
)
7003 if (gfc_current_state () != COMP_MODULE
7004 && !(gfc_current_state () == COMP_DERIVED
7005 && gfc_state_stack
->previous
7006 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
7007 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
7008 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
7009 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
7011 gfc_error ("PRIVATE statement at %C is only allowed in the "
7012 "specification part of a module");
7016 if (gfc_current_state () == COMP_DERIVED
)
7018 if (gfc_match_eos () == MATCH_YES
)
7024 gfc_syntax_error (ST_PRIVATE
);
7028 if (gfc_match_eos () == MATCH_YES
)
7035 return access_attr_decl (ST_PRIVATE
);
7040 gfc_match_public (gfc_statement
*st
)
7043 if (gfc_match ("public") != MATCH_YES
)
7046 if (gfc_current_state () != COMP_MODULE
)
7048 gfc_error ("PUBLIC statement at %C is only allowed in the "
7049 "specification part of a module");
7053 if (gfc_match_eos () == MATCH_YES
)
7060 return access_attr_decl (ST_PUBLIC
);
7064 /* Workhorse for gfc_match_parameter. */
7074 m
= gfc_match_symbol (&sym
, 0);
7076 gfc_error ("Expected variable name at %C in PARAMETER statement");
7081 if (gfc_match_char ('=') == MATCH_NO
)
7083 gfc_error ("Expected = sign in PARAMETER statement at %C");
7087 m
= gfc_match_init_expr (&init
);
7089 gfc_error ("Expected expression at %C in PARAMETER statement");
7093 if (sym
->ts
.type
== BT_UNKNOWN
7094 && !gfc_set_default_type (sym
, 1, NULL
))
7100 if (!gfc_check_assign_symbol (sym
, NULL
, init
)
7101 || !gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
))
7109 gfc_error ("Initializing already initialized variable at %C");
7114 t
= add_init_expr_to_sym (sym
->name
, &init
, &gfc_current_locus
);
7115 return (t
) ? MATCH_YES
: MATCH_ERROR
;
7118 gfc_free_expr (init
);
7123 /* Match a parameter statement, with the weird syntax that these have. */
7126 gfc_match_parameter (void)
7130 if (gfc_match_char ('(') == MATCH_NO
)
7139 if (gfc_match (" )%t") == MATCH_YES
)
7142 if (gfc_match_char (',') != MATCH_YES
)
7144 gfc_error ("Unexpected characters in PARAMETER statement at %C");
7154 /* Save statements have a special syntax. */
7157 gfc_match_save (void)
7159 char n
[GFC_MAX_SYMBOL_LEN
+1];
7164 if (gfc_match_eos () == MATCH_YES
)
7166 if (gfc_current_ns
->seen_save
)
7168 if (!gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
7169 "follows previous SAVE statement"))
7173 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
7177 if (gfc_current_ns
->save_all
)
7179 if (!gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
7180 "blanket SAVE statement"))
7188 m
= gfc_match_symbol (&sym
, 0);
7192 if (!gfc_add_save (&sym
->attr
, SAVE_EXPLICIT
, sym
->name
,
7193 &gfc_current_locus
))
7204 m
= gfc_match (" / %n /", &n
);
7205 if (m
== MATCH_ERROR
)
7210 c
= gfc_get_common (n
, 0);
7213 gfc_current_ns
->seen_save
= 1;
7216 if (gfc_match_eos () == MATCH_YES
)
7218 if (gfc_match_char (',') != MATCH_YES
)
7225 gfc_error ("Syntax error in SAVE statement at %C");
7231 gfc_match_value (void)
7236 /* This is not allowed within a BLOCK construct! */
7237 if (gfc_current_state () == COMP_BLOCK
)
7239 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
7243 if (!gfc_notify_std (GFC_STD_F2003
, "VALUE statement at %C"))
7246 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7251 if (gfc_match_eos () == MATCH_YES
)
7256 m
= gfc_match_symbol (&sym
, 0);
7260 if (!gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7272 if (gfc_match_eos () == MATCH_YES
)
7274 if (gfc_match_char (',') != MATCH_YES
)
7281 gfc_error ("Syntax error in VALUE statement at %C");
7287 gfc_match_volatile (void)
7292 if (!gfc_notify_std (GFC_STD_F2003
, "VOLATILE statement at %C"))
7295 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7300 if (gfc_match_eos () == MATCH_YES
)
7305 /* VOLATILE is special because it can be added to host-associated
7306 symbols locally. Except for coarrays. */
7307 m
= gfc_match_symbol (&sym
, 1);
7311 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
7312 for variable in a BLOCK which is defined outside of the BLOCK. */
7313 if (sym
->ns
!= gfc_current_ns
&& sym
->attr
.codimension
)
7315 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
7316 "%C, which is use-/host-associated", sym
->name
);
7319 if (!gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7331 if (gfc_match_eos () == MATCH_YES
)
7333 if (gfc_match_char (',') != MATCH_YES
)
7340 gfc_error ("Syntax error in VOLATILE statement at %C");
7346 gfc_match_asynchronous (void)
7351 if (!gfc_notify_std (GFC_STD_F2003
, "ASYNCHRONOUS statement at %C"))
7354 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7359 if (gfc_match_eos () == MATCH_YES
)
7364 /* ASYNCHRONOUS is special because it can be added to host-associated
7366 m
= gfc_match_symbol (&sym
, 1);
7370 if (!gfc_add_asynchronous (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7382 if (gfc_match_eos () == MATCH_YES
)
7384 if (gfc_match_char (',') != MATCH_YES
)
7391 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
7396 /* Match a module procedure statement. Note that we have to modify
7397 symbols in the parent's namespace because the current one was there
7398 to receive symbols that are in an interface's formal argument list. */
7401 gfc_match_modproc (void)
7403 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7407 gfc_namespace
*module_ns
;
7408 gfc_interface
*old_interface_head
, *interface
;
7410 if (gfc_state_stack
->state
!= COMP_INTERFACE
7411 || gfc_state_stack
->previous
== NULL
7412 || current_interface
.type
== INTERFACE_NAMELESS
7413 || current_interface
.type
== INTERFACE_ABSTRACT
)
7415 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
7420 module_ns
= gfc_current_ns
->parent
;
7421 for (; module_ns
; module_ns
= module_ns
->parent
)
7422 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
7423 || module_ns
->proc_name
->attr
.flavor
== FL_PROGRAM
7424 || (module_ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
7425 && !module_ns
->proc_name
->attr
.contained
))
7428 if (module_ns
== NULL
)
7431 /* Store the current state of the interface. We will need it if we
7432 end up with a syntax error and need to recover. */
7433 old_interface_head
= gfc_current_interface_head ();
7435 /* Check if the F2008 optional double colon appears. */
7436 gfc_gobble_whitespace ();
7437 old_locus
= gfc_current_locus
;
7438 if (gfc_match ("::") == MATCH_YES
)
7440 if (!gfc_notify_std (GFC_STD_F2008
, "double colon in "
7441 "MODULE PROCEDURE statement at %L", &old_locus
))
7445 gfc_current_locus
= old_locus
;
7450 old_locus
= gfc_current_locus
;
7452 m
= gfc_match_name (name
);
7458 /* Check for syntax error before starting to add symbols to the
7459 current namespace. */
7460 if (gfc_match_eos () == MATCH_YES
)
7463 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7466 /* Now we're sure the syntax is valid, we process this item
7468 if (gfc_get_symbol (name
, module_ns
, &sym
))
7471 if (sym
->attr
.intrinsic
)
7473 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
7474 "PROCEDURE", &old_locus
);
7478 if (sym
->attr
.proc
!= PROC_MODULE
7479 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
7482 if (!gfc_add_interface (sym
))
7485 sym
->attr
.mod_proc
= 1;
7486 sym
->declared_at
= old_locus
;
7495 /* Restore the previous state of the interface. */
7496 interface
= gfc_current_interface_head ();
7497 gfc_set_current_interface_head (old_interface_head
);
7499 /* Free the new interfaces. */
7500 while (interface
!= old_interface_head
)
7502 gfc_interface
*i
= interface
->next
;
7507 /* And issue a syntax error. */
7508 gfc_syntax_error (ST_MODULE_PROC
);
7513 /* Check a derived type that is being extended. */
7516 check_extended_derived_type (char *name
)
7518 gfc_symbol
*extended
;
7520 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
7522 gfc_error ("Ambiguous symbol in TYPE definition at %C");
7526 extended
= gfc_find_dt_in_generic (extended
);
7531 gfc_error ("Symbol '%s' at %C has not been previously defined", name
);
7535 if (extended
->attr
.flavor
!= FL_DERIVED
)
7537 gfc_error ("'%s' in EXTENDS expression at %C is not a "
7538 "derived type", name
);
7542 if (extended
->attr
.is_bind_c
)
7544 gfc_error ("'%s' cannot be extended at %C because it "
7545 "is BIND(C)", extended
->name
);
7549 if (extended
->attr
.sequence
)
7551 gfc_error ("'%s' cannot be extended at %C because it "
7552 "is a SEQUENCE type", extended
->name
);
7560 /* Match the optional attribute specifiers for a type declaration.
7561 Return MATCH_ERROR if an error is encountered in one of the handled
7562 attributes (public, private, bind(c)), MATCH_NO if what's found is
7563 not a handled attribute, and MATCH_YES otherwise. TODO: More error
7564 checking on attribute conflicts needs to be done. */
7567 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
7569 /* See if the derived type is marked as private. */
7570 if (gfc_match (" , private") == MATCH_YES
)
7572 if (gfc_current_state () != COMP_MODULE
)
7574 gfc_error ("Derived type at %C can only be PRIVATE in the "
7575 "specification part of a module");
7579 if (!gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
))
7582 else if (gfc_match (" , public") == MATCH_YES
)
7584 if (gfc_current_state () != COMP_MODULE
)
7586 gfc_error ("Derived type at %C can only be PUBLIC in the "
7587 "specification part of a module");
7591 if (!gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
))
7594 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
7596 /* If the type is defined to be bind(c) it then needs to make
7597 sure that all fields are interoperable. This will
7598 need to be a semantic check on the finished derived type.
7599 See 15.2.3 (lines 9-12) of F2003 draft. */
7600 if (!gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0))
7603 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
7605 else if (gfc_match (" , abstract") == MATCH_YES
)
7607 if (!gfc_notify_std (GFC_STD_F2003
, "ABSTRACT type at %C"))
7610 if (!gfc_add_abstract (attr
, &gfc_current_locus
))
7613 else if (name
&& gfc_match (" , extends ( %n )", name
) == MATCH_YES
)
7615 if (!gfc_add_extension (attr
, &gfc_current_locus
))
7621 /* If we get here, something matched. */
7626 /* Match the beginning of a derived type declaration. If a type name
7627 was the result of a function, then it is possible to have a symbol
7628 already to be known as a derived type yet have no components. */
7631 gfc_match_derived_decl (void)
7633 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7634 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
7635 symbol_attribute attr
;
7636 gfc_symbol
*sym
, *gensym
;
7637 gfc_symbol
*extended
;
7639 match is_type_attr_spec
= MATCH_NO
;
7640 bool seen_attr
= false;
7641 gfc_interface
*intr
= NULL
, *head
;
7643 if (gfc_current_state () == COMP_DERIVED
)
7648 gfc_clear_attr (&attr
);
7653 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
7654 if (is_type_attr_spec
== MATCH_ERROR
)
7656 if (is_type_attr_spec
== MATCH_YES
)
7658 } while (is_type_attr_spec
== MATCH_YES
);
7660 /* Deal with derived type extensions. The extension attribute has
7661 been added to 'attr' but now the parent type must be found and
7664 extended
= check_extended_derived_type (parent
);
7666 if (parent
[0] && !extended
)
7669 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
7671 gfc_error ("Expected :: in TYPE definition at %C");
7675 m
= gfc_match (" %n%t", name
);
7679 /* Make sure the name is not the name of an intrinsic type. */
7680 if (gfc_is_intrinsic_typename (name
))
7682 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7687 if (gfc_get_symbol (name
, NULL
, &gensym
))
7690 if (!gensym
->attr
.generic
&& gensym
->ts
.type
!= BT_UNKNOWN
)
7692 gfc_error ("Derived type name '%s' at %C already has a basic type "
7693 "of %s", gensym
->name
, gfc_typename (&gensym
->ts
));
7697 if (!gensym
->attr
.generic
7698 && !gfc_add_generic (&gensym
->attr
, gensym
->name
, NULL
))
7701 if (!gensym
->attr
.function
7702 && !gfc_add_function (&gensym
->attr
, gensym
->name
, NULL
))
7705 sym
= gfc_find_dt_in_generic (gensym
);
7707 if (sym
&& (sym
->components
!= NULL
|| sym
->attr
.zero_comp
))
7709 gfc_error ("Derived type definition of '%s' at %C has already been "
7710 "defined", sym
->name
);
7716 /* Use upper case to save the actual derived-type symbol. */
7717 gfc_get_symbol (gfc_get_string ("%c%s",
7718 (char) TOUPPER ((unsigned char) gensym
->name
[0]),
7719 &gensym
->name
[1]), NULL
, &sym
);
7720 sym
->name
= gfc_get_string (gensym
->name
);
7721 head
= gensym
->generic
;
7722 intr
= gfc_get_interface ();
7724 intr
->where
= gfc_current_locus
;
7725 intr
->sym
->declared_at
= gfc_current_locus
;
7727 gensym
->generic
= intr
;
7728 gensym
->attr
.if_source
= IFSRC_DECL
;
7731 /* The symbol may already have the derived attribute without the
7732 components. The ways this can happen is via a function
7733 definition, an INTRINSIC statement or a subtype in another
7734 derived type that is a pointer. The first part of the AND clause
7735 is true if the symbol is not the return value of a function. */
7736 if (sym
->attr
.flavor
!= FL_DERIVED
7737 && !gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
))
7740 if (attr
.access
!= ACCESS_UNKNOWN
7741 && !gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
))
7743 else if (sym
->attr
.access
== ACCESS_UNKNOWN
7744 && gensym
->attr
.access
!= ACCESS_UNKNOWN
7745 && !gfc_add_access (&sym
->attr
, gensym
->attr
.access
,
7749 if (sym
->attr
.access
!= ACCESS_UNKNOWN
7750 && gensym
->attr
.access
== ACCESS_UNKNOWN
)
7751 gensym
->attr
.access
= sym
->attr
.access
;
7753 /* See if the derived type was labeled as bind(c). */
7754 if (attr
.is_bind_c
!= 0)
7755 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
7757 /* Construct the f2k_derived namespace if it is not yet there. */
7758 if (!sym
->f2k_derived
)
7759 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7761 if (extended
&& !sym
->components
)
7766 /* Add the extended derived type as the first component. */
7767 gfc_add_component (sym
, parent
, &p
);
7769 gfc_set_sym_referenced (extended
);
7771 p
->ts
.type
= BT_DERIVED
;
7772 p
->ts
.u
.derived
= extended
;
7773 p
->initializer
= gfc_default_initializer (&p
->ts
);
7775 /* Set extension level. */
7776 if (extended
->attr
.extension
== 255)
7778 /* Since the extension field is 8 bit wide, we can only have
7779 up to 255 extension levels. */
7780 gfc_error ("Maximum extension level reached with type '%s' at %L",
7781 extended
->name
, &extended
->declared_at
);
7784 sym
->attr
.extension
= extended
->attr
.extension
+ 1;
7786 /* Provide the links between the extended type and its extension. */
7787 if (!extended
->f2k_derived
)
7788 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7789 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
7793 if (!sym
->hash_value
)
7794 /* Set the hash for the compound name for this type. */
7795 sym
->hash_value
= gfc_hash_value (sym
);
7797 /* Take over the ABSTRACT attribute. */
7798 sym
->attr
.abstract
= attr
.abstract
;
7800 gfc_new_block
= sym
;
7806 /* Cray Pointees can be declared as:
7807 pointer (ipt, a (n,m,...,*)) */
7810 gfc_mod_pointee_as (gfc_array_spec
*as
)
7812 as
->cray_pointee
= true; /* This will be useful to know later. */
7813 if (as
->type
== AS_ASSUMED_SIZE
)
7814 as
->cp_was_assumed
= true;
7815 else if (as
->type
== AS_ASSUMED_SHAPE
)
7817 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7824 /* Match the enum definition statement, here we are trying to match
7825 the first line of enum definition statement.
7826 Returns MATCH_YES if match is found. */
7829 gfc_match_enum (void)
7833 m
= gfc_match_eos ();
7837 if (!gfc_notify_std (GFC_STD_F2003
, "ENUM and ENUMERATOR at %C"))
7844 /* Returns an initializer whose value is one higher than the value of the
7845 LAST_INITIALIZER argument. If the argument is NULL, the
7846 initializers value will be set to zero. The initializer's kind
7847 will be set to gfc_c_int_kind.
7849 If -fshort-enums is given, the appropriate kind will be selected
7850 later after all enumerators have been parsed. A warning is issued
7851 here if an initializer exceeds gfc_c_int_kind. */
7854 enum_initializer (gfc_expr
*last_initializer
, locus where
)
7857 result
= gfc_get_constant_expr (BT_INTEGER
, gfc_c_int_kind
, &where
);
7859 mpz_init (result
->value
.integer
);
7861 if (last_initializer
!= NULL
)
7863 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
7864 result
->where
= last_initializer
->where
;
7866 if (gfc_check_integer_range (result
->value
.integer
,
7867 gfc_c_int_kind
) != ARITH_OK
)
7869 gfc_error ("Enumerator exceeds the C integer type at %C");
7875 /* Control comes here, if it's the very first enumerator and no
7876 initializer has been given. It will be initialized to zero. */
7877 mpz_set_si (result
->value
.integer
, 0);
7884 /* Match a variable name with an optional initializer. When this
7885 subroutine is called, a variable is expected to be parsed next.
7886 Depending on what is happening at the moment, updates either the
7887 symbol table or the current interface. */
7890 enumerator_decl (void)
7892 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7893 gfc_expr
*initializer
;
7894 gfc_array_spec
*as
= NULL
;
7902 old_locus
= gfc_current_locus
;
7904 /* When we get here, we've just matched a list of attributes and
7905 maybe a type and a double colon. The next thing we expect to see
7906 is the name of the symbol. */
7907 m
= gfc_match_name (name
);
7911 var_locus
= gfc_current_locus
;
7913 /* OK, we've successfully matched the declaration. Now put the
7914 symbol in the current namespace. If we fail to create the symbol,
7916 if (!build_sym (name
, NULL
, false, &as
, &var_locus
))
7922 /* The double colon must be present in order to have initializers.
7923 Otherwise the statement is ambiguous with an assignment statement. */
7926 if (gfc_match_char ('=') == MATCH_YES
)
7928 m
= gfc_match_init_expr (&initializer
);
7931 gfc_error ("Expected an initialization expression at %C");
7940 /* If we do not have an initializer, the initialization value of the
7941 previous enumerator (stored in last_initializer) is incremented
7942 by 1 and is used to initialize the current enumerator. */
7943 if (initializer
== NULL
)
7944 initializer
= enum_initializer (last_initializer
, old_locus
);
7946 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
7948 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7954 /* Store this current initializer, for the next enumerator variable
7955 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7956 use last_initializer below. */
7957 last_initializer
= initializer
;
7958 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
7960 /* Maintain enumerator history. */
7961 gfc_find_symbol (name
, NULL
, 0, &sym
);
7962 create_enum_history (sym
, last_initializer
);
7964 return (t
) ? MATCH_YES
: MATCH_ERROR
;
7967 /* Free stuff up and return. */
7968 gfc_free_expr (initializer
);
7974 /* Match the enumerator definition statement. */
7977 gfc_match_enumerator_def (void)
7982 gfc_clear_ts (¤t_ts
);
7984 m
= gfc_match (" enumerator");
7988 m
= gfc_match (" :: ");
7989 if (m
== MATCH_ERROR
)
7992 colon_seen
= (m
== MATCH_YES
);
7994 if (gfc_current_state () != COMP_ENUM
)
7996 gfc_error ("ENUM definition statement expected before %C");
7997 gfc_free_enum_history ();
8001 (¤t_ts
)->type
= BT_INTEGER
;
8002 (¤t_ts
)->kind
= gfc_c_int_kind
;
8004 gfc_clear_attr (¤t_attr
);
8005 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
8014 m
= enumerator_decl ();
8015 if (m
== MATCH_ERROR
)
8017 gfc_free_enum_history ();
8023 if (gfc_match_eos () == MATCH_YES
)
8025 if (gfc_match_char (',') != MATCH_YES
)
8029 if (gfc_current_state () == COMP_ENUM
)
8031 gfc_free_enum_history ();
8032 gfc_error ("Syntax error in ENUMERATOR definition at %C");
8037 gfc_free_array_spec (current_as
);
8044 /* Match binding attributes. */
8047 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
8049 bool found_passing
= false;
8050 bool seen_ptr
= false;
8051 match m
= MATCH_YES
;
8053 /* Initialize to defaults. Do so even before the MATCH_NO check so that in
8054 this case the defaults are in there. */
8055 ba
->access
= ACCESS_UNKNOWN
;
8056 ba
->pass_arg
= NULL
;
8057 ba
->pass_arg_num
= 0;
8059 ba
->non_overridable
= 0;
8063 /* If we find a comma, we believe there are binding attributes. */
8064 m
= gfc_match_char (',');
8070 /* Access specifier. */
8072 m
= gfc_match (" public");
8073 if (m
== MATCH_ERROR
)
8077 if (ba
->access
!= ACCESS_UNKNOWN
)
8079 gfc_error ("Duplicate access-specifier at %C");
8083 ba
->access
= ACCESS_PUBLIC
;
8087 m
= gfc_match (" private");
8088 if (m
== MATCH_ERROR
)
8092 if (ba
->access
!= ACCESS_UNKNOWN
)
8094 gfc_error ("Duplicate access-specifier at %C");
8098 ba
->access
= ACCESS_PRIVATE
;
8102 /* If inside GENERIC, the following is not allowed. */
8107 m
= gfc_match (" nopass");
8108 if (m
== MATCH_ERROR
)
8114 gfc_error ("Binding attributes already specify passing,"
8115 " illegal NOPASS at %C");
8119 found_passing
= true;
8124 /* PASS possibly including argument. */
8125 m
= gfc_match (" pass");
8126 if (m
== MATCH_ERROR
)
8130 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
8134 gfc_error ("Binding attributes already specify passing,"
8135 " illegal PASS at %C");
8139 m
= gfc_match (" ( %n )", arg
);
8140 if (m
== MATCH_ERROR
)
8143 ba
->pass_arg
= gfc_get_string (arg
);
8144 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
8146 found_passing
= true;
8154 m
= gfc_match (" pointer");
8155 if (m
== MATCH_ERROR
)
8161 gfc_error ("Duplicate POINTER attribute at %C");
8171 /* NON_OVERRIDABLE flag. */
8172 m
= gfc_match (" non_overridable");
8173 if (m
== MATCH_ERROR
)
8177 if (ba
->non_overridable
)
8179 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
8183 ba
->non_overridable
= 1;
8187 /* DEFERRED flag. */
8188 m
= gfc_match (" deferred");
8189 if (m
== MATCH_ERROR
)
8195 gfc_error ("Duplicate DEFERRED at %C");
8206 /* Nothing matching found. */
8208 gfc_error ("Expected access-specifier at %C");
8210 gfc_error ("Expected binding attribute at %C");
8213 while (gfc_match_char (',') == MATCH_YES
);
8215 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
8216 if (ba
->non_overridable
&& ba
->deferred
)
8218 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
8225 if (ba
->access
== ACCESS_UNKNOWN
)
8226 ba
->access
= gfc_typebound_default_access
;
8228 if (ppc
&& !seen_ptr
)
8230 gfc_error ("POINTER attribute is required for procedure pointer component"
8242 /* Match a PROCEDURE specific binding inside a derived type. */
8245 match_procedure_in_type (void)
8247 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8248 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
8249 char* target
= NULL
, *ifc
= NULL
;
8250 gfc_typebound_proc tb
;
8259 /* Check current state. */
8260 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
8261 block
= gfc_state_stack
->previous
->sym
;
8264 /* Try to match PROCEDURE(interface). */
8265 if (gfc_match (" (") == MATCH_YES
)
8267 m
= gfc_match_name (target_buf
);
8268 if (m
== MATCH_ERROR
)
8272 gfc_error ("Interface-name expected after '(' at %C");
8276 if (gfc_match (" )") != MATCH_YES
)
8278 gfc_error ("')' expected at %C");
8285 /* Construct the data structure. */
8286 memset (&tb
, 0, sizeof (tb
));
8287 tb
.where
= gfc_current_locus
;
8289 /* Match binding attributes. */
8290 m
= match_binding_attributes (&tb
, false, false);
8291 if (m
== MATCH_ERROR
)
8293 seen_attrs
= (m
== MATCH_YES
);
8295 /* Check that attribute DEFERRED is given if an interface is specified. */
8296 if (tb
.deferred
&& !ifc
)
8298 gfc_error ("Interface must be specified for DEFERRED binding at %C");
8301 if (ifc
&& !tb
.deferred
)
8303 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
8307 /* Match the colons. */
8308 m
= gfc_match (" ::");
8309 if (m
== MATCH_ERROR
)
8311 seen_colons
= (m
== MATCH_YES
);
8312 if (seen_attrs
&& !seen_colons
)
8314 gfc_error ("Expected '::' after binding-attributes at %C");
8318 /* Match the binding names. */
8321 m
= gfc_match_name (name
);
8322 if (m
== MATCH_ERROR
)
8326 gfc_error ("Expected binding name at %C");
8330 if (num
>1 && !gfc_notify_std (GFC_STD_F2008
, "PROCEDURE list at %C"))
8333 /* Try to match the '=> target', if it's there. */
8335 m
= gfc_match (" =>");
8336 if (m
== MATCH_ERROR
)
8342 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
8348 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
8353 m
= gfc_match_name (target_buf
);
8354 if (m
== MATCH_ERROR
)
8358 gfc_error ("Expected binding target after '=>' at %C");
8361 target
= target_buf
;
8364 /* If no target was found, it has the same name as the binding. */
8368 /* Get the namespace to insert the symbols into. */
8369 ns
= block
->f2k_derived
;
8372 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
8373 if (tb
.deferred
&& !block
->attr
.abstract
)
8375 gfc_error ("Type '%s' containing DEFERRED binding at %C "
8376 "is not ABSTRACT", block
->name
);
8380 /* See if we already have a binding with this name in the symtree which
8381 would be an error. If a GENERIC already targeted this binding, it may
8382 be already there but then typebound is still NULL. */
8383 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
8384 if (stree
&& stree
->n
.tb
)
8386 gfc_error ("There is already a procedure with binding name '%s' for "
8387 "the derived type '%s' at %C", name
, block
->name
);
8391 /* Insert it and set attributes. */
8395 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
8398 stree
->n
.tb
= gfc_get_typebound_proc (&tb
);
8400 if (gfc_get_sym_tree (target
, gfc_current_ns
, &stree
->n
.tb
->u
.specific
,
8403 gfc_set_sym_referenced (stree
->n
.tb
->u
.specific
->n
.sym
);
8405 if (gfc_match_eos () == MATCH_YES
)
8407 if (gfc_match_char (',') != MATCH_YES
)
8412 gfc_error ("Syntax error in PROCEDURE statement at %C");
8417 /* Match a GENERIC procedure binding inside a derived type. */
8420 gfc_match_generic (void)
8422 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8423 char bind_name
[GFC_MAX_SYMBOL_LEN
+ 16]; /* Allow space for OPERATOR(...). */
8425 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
8426 gfc_typebound_proc
* tb
;
8428 interface_type op_type
;
8429 gfc_intrinsic_op op
;
8432 /* Check current state. */
8433 if (gfc_current_state () == COMP_DERIVED
)
8435 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
8438 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
8440 block
= gfc_state_stack
->previous
->sym
;
8441 ns
= block
->f2k_derived
;
8442 gcc_assert (block
&& ns
);
8444 memset (&tbattr
, 0, sizeof (tbattr
));
8445 tbattr
.where
= gfc_current_locus
;
8447 /* See if we get an access-specifier. */
8448 m
= match_binding_attributes (&tbattr
, true, false);
8449 if (m
== MATCH_ERROR
)
8452 /* Now the colons, those are required. */
8453 if (gfc_match (" ::") != MATCH_YES
)
8455 gfc_error ("Expected '::' at %C");
8459 /* Match the binding name; depending on type (operator / generic) format
8460 it for future error messages into bind_name. */
8462 m
= gfc_match_generic_spec (&op_type
, name
, &op
);
8463 if (m
== MATCH_ERROR
)
8467 gfc_error ("Expected generic name or operator descriptor at %C");
8473 case INTERFACE_GENERIC
:
8474 snprintf (bind_name
, sizeof (bind_name
), "%s", name
);
8477 case INTERFACE_USER_OP
:
8478 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(.%s.)", name
);
8481 case INTERFACE_INTRINSIC_OP
:
8482 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(%s)",
8483 gfc_op2string (op
));
8490 /* Match the required =>. */
8491 if (gfc_match (" =>") != MATCH_YES
)
8493 gfc_error ("Expected '=>' at %C");
8497 /* Try to find existing GENERIC binding with this name / for this operator;
8498 if there is something, check that it is another GENERIC and then extend
8499 it rather than building a new node. Otherwise, create it and put it
8500 at the right position. */
8504 case INTERFACE_USER_OP
:
8505 case INTERFACE_GENERIC
:
8507 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8510 st
= gfc_find_symtree (is_op
? ns
->tb_uop_root
: ns
->tb_sym_root
, name
);
8522 case INTERFACE_INTRINSIC_OP
:
8532 if (!tb
->is_generic
)
8534 gcc_assert (op_type
== INTERFACE_GENERIC
);
8535 gfc_error ("There's already a non-generic procedure with binding name"
8536 " '%s' for the derived type '%s' at %C",
8537 bind_name
, block
->name
);
8541 if (tb
->access
!= tbattr
.access
)
8543 gfc_error ("Binding at %C must have the same access as already"
8544 " defined binding '%s'", bind_name
);
8550 tb
= gfc_get_typebound_proc (NULL
);
8551 tb
->where
= gfc_current_locus
;
8552 tb
->access
= tbattr
.access
;
8554 tb
->u
.generic
= NULL
;
8558 case INTERFACE_GENERIC
:
8559 case INTERFACE_USER_OP
:
8561 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8564 st
= gfc_new_symtree (is_op
? &ns
->tb_uop_root
: &ns
->tb_sym_root
,
8572 case INTERFACE_INTRINSIC_OP
:
8581 /* Now, match all following names as specific targets. */
8584 gfc_symtree
* target_st
;
8585 gfc_tbp_generic
* target
;
8587 m
= gfc_match_name (name
);
8588 if (m
== MATCH_ERROR
)
8592 gfc_error ("Expected specific binding name at %C");
8596 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
8598 /* See if this is a duplicate specification. */
8599 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
8600 if (target_st
== target
->specific_st
)
8602 gfc_error ("'%s' already defined as specific binding for the"
8603 " generic '%s' at %C", name
, bind_name
);
8607 target
= gfc_get_tbp_generic ();
8608 target
->specific_st
= target_st
;
8609 target
->specific
= NULL
;
8610 target
->next
= tb
->u
.generic
;
8611 target
->is_operator
= ((op_type
== INTERFACE_USER_OP
)
8612 || (op_type
== INTERFACE_INTRINSIC_OP
));
8613 tb
->u
.generic
= target
;
8615 while (gfc_match (" ,") == MATCH_YES
);
8617 /* Here should be the end. */
8618 if (gfc_match_eos () != MATCH_YES
)
8620 gfc_error ("Junk after GENERIC binding at %C");
8631 /* Match a FINAL declaration inside a derived type. */
8634 gfc_match_final_decl (void)
8636 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8639 gfc_namespace
* module_ns
;
8643 if (gfc_current_form
== FORM_FREE
)
8645 char c
= gfc_peek_ascii_char ();
8646 if (!gfc_is_whitespace (c
) && c
!= ':')
8650 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
8652 if (gfc_current_form
== FORM_FIXED
)
8655 gfc_error ("FINAL declaration at %C must be inside a derived type "
8656 "CONTAINS section");
8660 block
= gfc_state_stack
->previous
->sym
;
8663 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
8664 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
8666 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8667 " specification part of a MODULE");
8671 module_ns
= gfc_current_ns
;
8672 gcc_assert (module_ns
);
8673 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
8675 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8676 if (gfc_match (" ::") == MATCH_ERROR
)
8679 /* Match the sequence of procedure names. */
8686 if (first
&& gfc_match_eos () == MATCH_YES
)
8688 gfc_error ("Empty FINAL at %C");
8692 m
= gfc_match_name (name
);
8695 gfc_error ("Expected module procedure name at %C");
8698 else if (m
!= MATCH_YES
)
8701 if (gfc_match_eos () == MATCH_YES
)
8703 if (!last
&& gfc_match_char (',') != MATCH_YES
)
8705 gfc_error ("Expected ',' at %C");
8709 if (gfc_get_symbol (name
, module_ns
, &sym
))
8711 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
8715 /* Mark the symbol as module procedure. */
8716 if (sym
->attr
.proc
!= PROC_MODULE
8717 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
8720 /* Check if we already have this symbol in the list, this is an error. */
8721 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
8722 if (f
->proc_sym
== sym
)
8724 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8729 /* Add this symbol to the list of finalizers. */
8730 gcc_assert (block
->f2k_derived
);
8732 f
= XCNEW (gfc_finalizer
);
8734 f
->proc_tree
= NULL
;
8735 f
->where
= gfc_current_locus
;
8736 f
->next
= block
->f2k_derived
->finalizers
;
8737 block
->f2k_derived
->finalizers
= f
;
8747 const ext_attr_t ext_attr_list
[] = {
8748 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
8749 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
8750 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
8751 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
8752 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
8753 { "no_arg_check", EXT_ATTR_NO_ARG_CHECK
, NULL
},
8754 { NULL
, EXT_ATTR_LAST
, NULL
}
8757 /* Match a !GCC$ ATTRIBUTES statement of the form:
8758 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8759 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8761 TODO: We should support all GCC attributes using the same syntax for
8762 the attribute list, i.e. the list in C
8763 __attributes(( attribute-list ))
8765 !GCC$ ATTRIBUTES attribute-list ::
8766 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8769 As there is absolutely no risk of confusion, we should never return
8772 gfc_match_gcc_attributes (void)
8774 symbol_attribute attr
;
8775 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8780 gfc_clear_attr (&attr
);
8785 if (gfc_match_name (name
) != MATCH_YES
)
8788 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
8789 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
8792 if (id
== EXT_ATTR_LAST
)
8794 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8798 if (!gfc_add_ext_attribute (&attr
, (ext_attr_id_t
)id
, &gfc_current_locus
))
8801 gfc_gobble_whitespace ();
8802 ch
= gfc_next_ascii_char ();
8805 /* This is the successful exit condition for the loop. */
8806 if (gfc_next_ascii_char () == ':')
8816 if (gfc_match_eos () == MATCH_YES
)
8821 m
= gfc_match_name (name
);
8825 if (find_special (name
, &sym
, true))
8828 sym
->attr
.ext_attr
|= attr
.ext_attr
;
8830 if (gfc_match_eos () == MATCH_YES
)
8833 if (gfc_match_char (',') != MATCH_YES
)
8840 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");