1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
28 #include "constructor.h"
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector
;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts
;
49 static symbol_attribute current_attr
;
50 static gfc_array_spec
*current_as
;
51 static int colon_seen
;
53 /* The current binding label (if any). */
54 static char curr_binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line
;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals
= 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr
*last_initializer
;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr
*initializer
;
74 struct enumerator_history
*next
;
78 /* Header of enum history chain. */
80 static enumerator_history
*enum_history
= NULL
;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history
*max_enum
= NULL
;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol
*gfc_new_block
;
90 bool gfc_matching_function
;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data
= false;
98 gfc_in_match_data (void)
100 return in_match_data
;
104 set_in_match_data (bool set_value
)
106 in_match_data
= set_value
;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable
*p
)
114 gfc_data_variable
*q
;
119 gfc_free_expr (p
->expr
);
120 gfc_free_iterator (&p
->iter
, 0);
121 free_variable (p
->list
);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value
*p
)
137 mpz_clear (p
->repeat
);
138 gfc_free_expr (p
->expr
);
144 /* Free a list of gfc_data structures. */
147 gfc_free_data (gfc_data
*p
)
154 free_variable (p
->var
);
155 free_value (p
->value
);
161 /* Free all data in a namespace. */
164 gfc_free_data_all (gfc_namespace
*ns
)
177 static match
var_element (gfc_data_variable
*);
179 /* Match a list of variables terminated by an iterator and a right
183 var_list (gfc_data_variable
*parent
)
185 gfc_data_variable
*tail
, var
;
188 m
= var_element (&var
);
189 if (m
== MATCH_ERROR
)
194 tail
= gfc_get_data_variable ();
201 if (gfc_match_char (',') != MATCH_YES
)
204 m
= gfc_match_iterator (&parent
->iter
, 1);
207 if (m
== MATCH_ERROR
)
210 m
= var_element (&var
);
211 if (m
== MATCH_ERROR
)
216 tail
->next
= gfc_get_data_variable ();
222 if (gfc_match_char (')') != MATCH_YES
)
227 gfc_syntax_error (ST_DATA
);
232 /* Match a single element in a data variable list, which can be a
233 variable-iterator list. */
236 var_element (gfc_data_variable
*new_var
)
241 memset (new_var
, 0, sizeof (gfc_data_variable
));
243 if (gfc_match_char ('(') == MATCH_YES
)
244 return var_list (new_var
);
246 m
= gfc_match_variable (&new_var
->expr
, 0);
250 sym
= new_var
->expr
->symtree
->n
.sym
;
252 /* Symbol should already have an associated type. */
253 if (gfc_check_symbol_typed (sym
, gfc_current_ns
,
254 false, gfc_current_locus
) == FAILURE
)
257 if (!sym
->attr
.function
&& gfc_current_ns
->parent
258 && gfc_current_ns
->parent
== sym
->ns
)
260 gfc_error ("Host associated variable '%s' may not be in the DATA "
261 "statement at %C", sym
->name
);
265 if (gfc_current_state () != COMP_BLOCK_DATA
266 && sym
->attr
.in_common
267 && gfc_notify_std (GFC_STD_GNU
, "Extension: initialization of "
268 "common block variable '%s' in DATA statement at %C",
269 sym
->name
) == FAILURE
)
272 if (gfc_add_data (&sym
->attr
, sym
->name
, &new_var
->expr
->where
) == FAILURE
)
279 /* Match the top-level list of data variables. */
282 top_var_list (gfc_data
*d
)
284 gfc_data_variable var
, *tail
, *new_var
;
291 m
= var_element (&var
);
294 if (m
== MATCH_ERROR
)
297 new_var
= gfc_get_data_variable ();
303 tail
->next
= new_var
;
307 if (gfc_match_char ('/') == MATCH_YES
)
309 if (gfc_match_char (',') != MATCH_YES
)
316 gfc_syntax_error (ST_DATA
);
317 gfc_free_data_all (gfc_current_ns
);
323 match_data_constant (gfc_expr
**result
)
325 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
331 m
= gfc_match_literal_constant (&expr
, 1);
338 if (m
== MATCH_ERROR
)
341 m
= gfc_match_null (result
);
345 old_loc
= gfc_current_locus
;
347 /* Should this be a structure component, try to match it
348 before matching a name. */
349 m
= gfc_match_rvalue (result
);
350 if (m
== MATCH_ERROR
)
353 if (m
== MATCH_YES
&& (*result
)->expr_type
== EXPR_STRUCTURE
)
355 if (gfc_simplify_expr (*result
, 0) == FAILURE
)
360 gfc_current_locus
= old_loc
;
362 m
= gfc_match_name (name
);
366 if (gfc_find_symbol (name
, NULL
, 1, &sym
))
370 || (sym
->attr
.flavor
!= FL_PARAMETER
&& sym
->attr
.flavor
!= FL_DERIVED
))
372 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
376 else if (sym
->attr
.flavor
== FL_DERIVED
)
377 return gfc_match_structure_constructor (sym
, result
, false);
379 /* Check to see if the value is an initialization array expression. */
380 if (sym
->value
->expr_type
== EXPR_ARRAY
)
382 gfc_current_locus
= old_loc
;
384 m
= gfc_match_init_expr (result
);
385 if (m
== MATCH_ERROR
)
390 if (gfc_simplify_expr (*result
, 0) == FAILURE
)
393 if ((*result
)->expr_type
== EXPR_CONSTANT
)
397 gfc_error ("Invalid initializer %s in Data statement at %C", name
);
403 *result
= gfc_copy_expr (sym
->value
);
408 /* Match a list of values in a DATA statement. The leading '/' has
409 already been seen at this point. */
412 top_val_list (gfc_data
*data
)
414 gfc_data_value
*new_val
, *tail
;
422 m
= match_data_constant (&expr
);
425 if (m
== MATCH_ERROR
)
428 new_val
= gfc_get_data_value ();
429 mpz_init (new_val
->repeat
);
432 data
->value
= new_val
;
434 tail
->next
= new_val
;
438 if (expr
->ts
.type
!= BT_INTEGER
|| gfc_match_char ('*') != MATCH_YES
)
441 mpz_set_ui (tail
->repeat
, 1);
445 if (expr
->ts
.type
== BT_INTEGER
)
446 mpz_set (tail
->repeat
, expr
->value
.integer
);
447 gfc_free_expr (expr
);
449 m
= match_data_constant (&tail
->expr
);
452 if (m
== MATCH_ERROR
)
456 if (gfc_match_char ('/') == MATCH_YES
)
458 if (gfc_match_char (',') == MATCH_NO
)
465 gfc_syntax_error (ST_DATA
);
466 gfc_free_data_all (gfc_current_ns
);
471 /* Matches an old style initialization. */
474 match_old_style_init (const char *name
)
481 /* Set up data structure to hold initializers. */
482 gfc_find_sym_tree (name
, NULL
, 0, &st
);
485 newdata
= gfc_get_data ();
486 newdata
->var
= gfc_get_data_variable ();
487 newdata
->var
->expr
= gfc_get_variable_expr (st
);
488 newdata
->where
= gfc_current_locus
;
490 /* Match initial value list. This also eats the terminal '/'. */
491 m
= top_val_list (newdata
);
500 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
505 if (gfc_implicit_pure (NULL
))
506 gfc_current_ns
->proc_name
->attr
.implicit_pure
= 0;
508 /* Mark the variable as having appeared in a data statement. */
509 if (gfc_add_data (&sym
->attr
, sym
->name
, &sym
->declared_at
) == FAILURE
)
515 /* Chain in namespace list of DATA initializers. */
516 newdata
->next
= gfc_current_ns
->data
;
517 gfc_current_ns
->data
= newdata
;
523 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
524 we are matching a DATA statement and are therefore issuing an error
525 if we encounter something unexpected, if not, we're trying to match
526 an old-style initialization expression of the form INTEGER I /2/. */
529 gfc_match_data (void)
534 set_in_match_data (true);
538 new_data
= gfc_get_data ();
539 new_data
->where
= gfc_current_locus
;
541 m
= top_var_list (new_data
);
545 m
= top_val_list (new_data
);
549 new_data
->next
= gfc_current_ns
->data
;
550 gfc_current_ns
->data
= new_data
;
552 if (gfc_match_eos () == MATCH_YES
)
555 gfc_match_char (','); /* Optional comma */
558 set_in_match_data (false);
562 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
566 if (gfc_implicit_pure (NULL
))
567 gfc_current_ns
->proc_name
->attr
.implicit_pure
= 0;
572 set_in_match_data (false);
573 gfc_free_data (new_data
);
578 /************************ Declaration statements *********************/
581 /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */
584 merge_array_spec (gfc_array_spec
*from
, gfc_array_spec
*to
, bool copy
)
588 if (to
->rank
== 0 && from
->rank
> 0)
590 to
->rank
= from
->rank
;
591 to
->type
= from
->type
;
592 to
->cray_pointee
= from
->cray_pointee
;
593 to
->cp_was_assumed
= from
->cp_was_assumed
;
595 for (i
= 0; i
< to
->corank
; i
++)
597 to
->lower
[from
->rank
+ i
] = to
->lower
[i
];
598 to
->upper
[from
->rank
+ i
] = to
->upper
[i
];
600 for (i
= 0; i
< from
->rank
; i
++)
604 to
->lower
[i
] = gfc_copy_expr (from
->lower
[i
]);
605 to
->upper
[i
] = gfc_copy_expr (from
->upper
[i
]);
609 to
->lower
[i
] = from
->lower
[i
];
610 to
->upper
[i
] = from
->upper
[i
];
614 else if (to
->corank
== 0 && from
->corank
> 0)
616 to
->corank
= from
->corank
;
617 to
->cotype
= from
->cotype
;
619 for (i
= 0; i
< from
->corank
; i
++)
623 to
->lower
[to
->rank
+ i
] = gfc_copy_expr (from
->lower
[i
]);
624 to
->upper
[to
->rank
+ i
] = gfc_copy_expr (from
->upper
[i
]);
628 to
->lower
[to
->rank
+ i
] = from
->lower
[i
];
629 to
->upper
[to
->rank
+ i
] = from
->upper
[i
];
636 /* Match an intent specification. Since this can only happen after an
637 INTENT word, a legal intent-spec must follow. */
640 match_intent_spec (void)
643 if (gfc_match (" ( in out )") == MATCH_YES
)
645 if (gfc_match (" ( in )") == MATCH_YES
)
647 if (gfc_match (" ( out )") == MATCH_YES
)
650 gfc_error ("Bad INTENT specification at %C");
651 return INTENT_UNKNOWN
;
655 /* Matches a character length specification, which is either a
656 specification expression, '*', or ':'. */
659 char_len_param_value (gfc_expr
**expr
, bool *deferred
)
666 if (gfc_match_char ('*') == MATCH_YES
)
669 if (gfc_match_char (':') == MATCH_YES
)
671 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: deferred type "
672 "parameter at %C") == FAILURE
)
680 m
= gfc_match_expr (expr
);
683 && gfc_expr_check_typed (*expr
, gfc_current_ns
, false) == FAILURE
)
686 if (m
== MATCH_YES
&& (*expr
)->expr_type
== EXPR_FUNCTION
)
688 if ((*expr
)->value
.function
.actual
689 && (*expr
)->value
.function
.actual
->expr
->symtree
)
692 e
= (*expr
)->value
.function
.actual
->expr
;
693 if (e
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
694 && e
->expr_type
== EXPR_VARIABLE
)
696 if (e
->symtree
->n
.sym
->ts
.type
== BT_UNKNOWN
)
698 if (e
->symtree
->n
.sym
->ts
.type
== BT_CHARACTER
699 && e
->symtree
->n
.sym
->ts
.u
.cl
700 && e
->symtree
->n
.sym
->ts
.u
.cl
->length
->ts
.type
== BT_UNKNOWN
)
708 gfc_error ("Conflict in attributes of function argument at %C");
713 /* A character length is a '*' followed by a literal integer or a
714 char_len_param_value in parenthesis. */
717 match_char_length (gfc_expr
**expr
, bool *deferred
)
723 m
= gfc_match_char ('*');
727 m
= gfc_match_small_literal_int (&length
, NULL
);
728 if (m
== MATCH_ERROR
)
733 if (gfc_notify_std (GFC_STD_F95_OBS
, "Obsolescent feature: "
734 "Old-style character length at %C") == FAILURE
)
736 *expr
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, length
);
740 if (gfc_match_char ('(') == MATCH_NO
)
743 m
= char_len_param_value (expr
, deferred
);
744 if (m
!= MATCH_YES
&& gfc_matching_function
)
750 if (m
== MATCH_ERROR
)
755 if (gfc_match_char (')') == MATCH_NO
)
757 gfc_free_expr (*expr
);
765 gfc_error ("Syntax error in character length specification at %C");
770 /* Special subroutine for finding a symbol. Check if the name is found
771 in the current name space. If not, and we're compiling a function or
772 subroutine and the parent compilation unit is an interface, then check
773 to see if the name we've been given is the name of the interface
774 (located in another namespace). */
777 find_special (const char *name
, gfc_symbol
**result
, bool allow_subroutine
)
783 i
= gfc_get_sym_tree (name
, NULL
, &st
, allow_subroutine
);
786 *result
= st
? st
->n
.sym
: NULL
;
790 if (gfc_current_state () != COMP_SUBROUTINE
791 && gfc_current_state () != COMP_FUNCTION
)
794 s
= gfc_state_stack
->previous
;
798 if (s
->state
!= COMP_INTERFACE
)
801 goto end
; /* Nameless interface. */
803 if (strcmp (name
, s
->sym
->name
) == 0)
814 /* Special subroutine for getting a symbol node associated with a
815 procedure name, used in SUBROUTINE and FUNCTION statements. The
816 symbol is created in the parent using with symtree node in the
817 child unit pointing to the symbol. If the current namespace has no
818 parent, then the symbol is just created in the current unit. */
821 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
827 /* Module functions have to be left in their own namespace because
828 they have potentially (almost certainly!) already been referenced.
829 In this sense, they are rather like external functions. This is
830 fixed up in resolve.c(resolve_entries), where the symbol name-
831 space is set to point to the master function, so that the fake
832 result mechanism can work. */
833 if (module_fcn_entry
)
835 /* Present if entry is declared to be a module procedure. */
836 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
839 rc
= gfc_get_symbol (name
, NULL
, result
);
840 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
841 && (*result
)->ts
.type
== BT_UNKNOWN
842 && sym
->attr
.flavor
== FL_UNKNOWN
)
843 /* Pick up the typespec for the entry, if declared in the function
844 body. Note that this symbol is FL_UNKNOWN because it will
845 only have appeared in a type declaration. The local symtree
846 is set to point to the module symbol and a unique symtree
847 to the local version. This latter ensures a correct clearing
850 /* If the ENTRY proceeds its specification, we need to ensure
851 that this does not raise a "has no IMPLICIT type" error. */
852 if (sym
->ts
.type
== BT_UNKNOWN
)
853 sym
->attr
.untyped
= 1;
855 (*result
)->ts
= sym
->ts
;
857 /* Put the symbol in the procedure namespace so that, should
858 the ENTRY precede its specification, the specification
860 (*result
)->ns
= gfc_current_ns
;
862 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
864 st
= gfc_get_unique_symtree (gfc_current_ns
);
869 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
875 gfc_current_ns
->refs
++;
877 if (sym
&& !sym
->gfc_new
&& gfc_current_state () != COMP_INTERFACE
)
879 /* Trap another encompassed procedure with the same name. All
880 these conditions are necessary to avoid picking up an entry
881 whose name clashes with that of the encompassing procedure;
882 this is handled using gsymbols to register unique,globally
884 if (sym
->attr
.flavor
!= 0
885 && sym
->attr
.proc
!= 0
886 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
887 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
888 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
889 name
, &sym
->declared_at
);
891 /* Trap a procedure with a name the same as interface in the
892 encompassing scope. */
893 if (sym
->attr
.generic
!= 0
894 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
895 && !sym
->attr
.mod_proc
)
896 gfc_error_now ("Name '%s' at %C is already defined"
897 " as a generic interface at %L",
898 name
, &sym
->declared_at
);
900 /* Trap declarations of attributes in encompassing scope. The
901 signature for this is that ts.kind is set. Legitimate
902 references only set ts.type. */
903 if (sym
->ts
.kind
!= 0
904 && !sym
->attr
.implicit_type
905 && sym
->attr
.proc
== 0
906 && gfc_current_ns
->parent
!= NULL
907 && sym
->attr
.access
== 0
908 && !module_fcn_entry
)
909 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
910 "and must not have attributes declared at %L",
911 name
, &sym
->declared_at
);
914 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
917 /* Module function entries will already have a symtree in
918 the current namespace but will need one at module level. */
919 if (module_fcn_entry
)
921 /* Present if entry is declared to be a module procedure. */
922 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
924 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
927 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
932 /* See if the procedure should be a module procedure. */
934 if (((sym
->ns
->proc_name
!= NULL
935 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
936 && sym
->attr
.proc
!= PROC_MODULE
)
937 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
938 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
939 sym
->name
, NULL
) == FAILURE
)
946 /* Verify that the given symbol representing a parameter is C
947 interoperable, by checking to see if it was marked as such after
948 its declaration. If the given symbol is not interoperable, a
949 warning is reported, thus removing the need to return the status to
950 the calling function. The standard does not require the user use
951 one of the iso_c_binding named constants to declare an
952 interoperable parameter, but we can't be sure if the param is C
953 interop or not if the user doesn't. For example, integer(4) may be
954 legal Fortran, but doesn't have meaning in C. It may interop with
955 a number of the C types, which causes a problem because the
956 compiler can't know which one. This code is almost certainly not
957 portable, and the user will get what they deserve if the C type
958 across platforms isn't always interoperable with integer(4). If
959 the user had used something like integer(c_int) or integer(c_long),
960 the compiler could have automatically handled the varying sizes
964 verify_c_interop_param (gfc_symbol
*sym
)
966 int is_c_interop
= 0;
967 gfc_try retval
= SUCCESS
;
969 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
970 Don't repeat the checks here. */
971 if (sym
->attr
.implicit_type
)
974 /* For subroutines or functions that are passed to a BIND(C) procedure,
975 they're interoperable if they're BIND(C) and their params are all
977 if (sym
->attr
.flavor
== FL_PROCEDURE
)
979 if (sym
->attr
.is_bind_c
== 0)
981 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
982 "attribute to be C interoperable", sym
->name
,
983 &(sym
->declared_at
));
989 if (sym
->attr
.is_c_interop
== 1)
990 /* We've already checked this procedure; don't check it again. */
993 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
998 /* See if we've stored a reference to a procedure that owns sym. */
999 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
1001 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
1004 (verify_c_interop (&(sym
->ts
))
1005 == SUCCESS
? 1 : 0);
1007 if (is_c_interop
!= 1)
1009 /* Make personalized messages to give better feedback. */
1010 if (sym
->ts
.type
== BT_DERIVED
)
1011 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
1012 "procedure '%s' but is not C interoperable "
1013 "because derived type '%s' is not C interoperable",
1014 sym
->name
, &(sym
->declared_at
),
1015 sym
->ns
->proc_name
->name
,
1016 sym
->ts
.u
.derived
->name
);
1018 gfc_warning ("Variable '%s' at %L is a parameter to the "
1019 "BIND(C) procedure '%s' but may not be C "
1021 sym
->name
, &(sym
->declared_at
),
1022 sym
->ns
->proc_name
->name
);
1025 /* Character strings are only C interoperable if they have a
1027 if (sym
->ts
.type
== BT_CHARACTER
)
1029 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
1030 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
1031 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
1033 gfc_error ("Character argument '%s' at %L "
1034 "must be length 1 because "
1035 "procedure '%s' is BIND(C)",
1036 sym
->name
, &sym
->declared_at
,
1037 sym
->ns
->proc_name
->name
);
1042 /* We have to make sure that any param to a bind(c) routine does
1043 not have the allocatable, pointer, or optional attributes,
1044 according to J3/04-007, section 5.1. */
1045 if (sym
->attr
.allocatable
== 1)
1047 gfc_error ("Variable '%s' at %L cannot have the "
1048 "ALLOCATABLE attribute because procedure '%s'"
1049 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
1050 sym
->ns
->proc_name
->name
);
1054 if (sym
->attr
.pointer
== 1)
1056 gfc_error ("Variable '%s' at %L cannot have the "
1057 "POINTER attribute because procedure '%s'"
1058 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
1059 sym
->ns
->proc_name
->name
);
1063 if (sym
->attr
.optional
== 1)
1065 gfc_error ("Variable '%s' at %L cannot have the "
1066 "OPTIONAL attribute because procedure '%s'"
1067 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
1068 sym
->ns
->proc_name
->name
);
1072 /* Make sure that if it has the dimension attribute, that it is
1073 either assumed size or explicit shape. */
1074 if (sym
->as
!= NULL
)
1076 if (sym
->as
->type
== AS_ASSUMED_SHAPE
)
1078 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1079 "argument to the procedure '%s' at %L because "
1080 "the procedure is BIND(C)", sym
->name
,
1081 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1082 &(sym
->ns
->proc_name
->declared_at
));
1086 if (sym
->as
->type
== AS_DEFERRED
)
1088 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1089 "argument to the procedure '%s' at %L because "
1090 "the procedure is BIND(C)", sym
->name
,
1091 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1092 &(sym
->ns
->proc_name
->declared_at
));
1104 /* Function called by variable_decl() that adds a name to the symbol table. */
1107 build_sym (const char *name
, gfc_charlen
*cl
, bool cl_deferred
,
1108 gfc_array_spec
**as
, locus
*var_locus
)
1110 symbol_attribute attr
;
1113 if (gfc_get_symbol (name
, NULL
, &sym
))
1116 /* Start updating the symbol table. Add basic type attribute if present. */
1117 if (current_ts
.type
!= BT_UNKNOWN
1118 && (sym
->attr
.implicit_type
== 0
1119 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1120 && gfc_add_type (sym
, ¤t_ts
, var_locus
) == FAILURE
)
1123 if (sym
->ts
.type
== BT_CHARACTER
)
1126 sym
->ts
.deferred
= cl_deferred
;
1129 /* Add dimension attribute if present. */
1130 if (gfc_set_array_spec (sym
, *as
, var_locus
) == FAILURE
)
1134 /* Add attribute to symbol. The copy is so that we can reset the
1135 dimension attribute. */
1136 attr
= current_attr
;
1138 attr
.codimension
= 0;
1140 if (gfc_copy_attr (&sym
->attr
, &attr
, var_locus
) == FAILURE
)
1143 /* Finish any work that may need to be done for the binding label,
1144 if it's a bind(c). The bind(c) attr is found before the symbol
1145 is made, and before the symbol name (for data decls), so the
1146 current_ts is holding the binding label, or nothing if the
1147 name= attr wasn't given. Therefore, test here if we're dealing
1148 with a bind(c) and make sure the binding label is set correctly. */
1149 if (sym
->attr
.is_bind_c
== 1)
1151 if (sym
->binding_label
[0] == '\0')
1153 /* Set the binding label and verify that if a NAME= was specified
1154 then only one identifier was in the entity-decl-list. */
1155 if (set_binding_label (sym
->binding_label
, sym
->name
,
1156 num_idents_on_line
) == FAILURE
)
1161 /* See if we know we're in a common block, and if it's a bind(c)
1162 common then we need to make sure we're an interoperable type. */
1163 if (sym
->attr
.in_common
== 1)
1165 /* Test the common block object. */
1166 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1167 && sym
->ts
.is_c_interop
!= 1)
1169 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1170 "must be declared with a C interoperable "
1171 "kind since common block '%s' is BIND(C)",
1172 sym
->name
, sym
->common_block
->name
,
1173 sym
->common_block
->name
);
1178 sym
->attr
.implied_index
= 0;
1180 if (sym
->ts
.type
== BT_CLASS
)
1181 return gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
, false);
1187 /* Set character constant to the given length. The constant will be padded or
1188 truncated. If we're inside an array constructor without a typespec, we
1189 additionally check that all elements have the same length; check_len -1
1190 means no checking. */
1193 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1198 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1199 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1201 slen
= expr
->value
.character
.length
;
1204 s
= gfc_get_wide_string (len
+ 1);
1205 memcpy (s
, expr
->value
.character
.string
,
1206 MIN (len
, slen
) * sizeof (gfc_char_t
));
1208 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1210 if (gfc_option
.warn_character_truncation
&& slen
> len
)
1211 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1212 "(%d/%d)", &expr
->where
, slen
, len
);
1214 /* Apply the standard by 'hand' otherwise it gets cleared for
1216 if (check_len
!= -1 && slen
!= check_len
1217 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1218 gfc_error_now ("The CHARACTER elements of the array constructor "
1219 "at %L must have the same length (%d/%d)",
1220 &expr
->where
, slen
, check_len
);
1223 gfc_free (expr
->value
.character
.string
);
1224 expr
->value
.character
.string
= s
;
1225 expr
->value
.character
.length
= len
;
1230 /* Function to create and update the enumerator history
1231 using the information passed as arguments.
1232 Pointer "max_enum" is also updated, to point to
1233 enum history node containing largest initializer.
1235 SYM points to the symbol node of enumerator.
1236 INIT points to its enumerator value. */
1239 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1241 enumerator_history
*new_enum_history
;
1242 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1244 new_enum_history
= XCNEW (enumerator_history
);
1246 new_enum_history
->sym
= sym
;
1247 new_enum_history
->initializer
= init
;
1248 new_enum_history
->next
= NULL
;
1250 if (enum_history
== NULL
)
1252 enum_history
= new_enum_history
;
1253 max_enum
= enum_history
;
1257 new_enum_history
->next
= enum_history
;
1258 enum_history
= new_enum_history
;
1260 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1261 new_enum_history
->initializer
->value
.integer
) < 0)
1262 max_enum
= new_enum_history
;
1267 /* Function to free enum kind history. */
1270 gfc_free_enum_history (void)
1272 enumerator_history
*current
= enum_history
;
1273 enumerator_history
*next
;
1275 while (current
!= NULL
)
1277 next
= current
->next
;
1282 enum_history
= NULL
;
1286 /* Function called by variable_decl() that adds an initialization
1287 expression to a symbol. */
1290 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1292 symbol_attribute attr
;
1297 if (find_special (name
, &sym
, false))
1302 /* If this symbol is confirming an implicit parameter type,
1303 then an initialization expression is not allowed. */
1304 if (attr
.flavor
== FL_PARAMETER
1305 && sym
->value
!= NULL
1308 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1315 /* An initializer is required for PARAMETER declarations. */
1316 if (attr
.flavor
== FL_PARAMETER
)
1318 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1324 /* If a variable appears in a DATA block, it cannot have an
1328 gfc_error ("Variable '%s' at %C with an initializer already "
1329 "appears in a DATA statement", sym
->name
);
1333 /* Check if the assignment can happen. This has to be put off
1334 until later for derived type variables and procedure pointers. */
1335 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1336 && sym
->ts
.type
!= BT_CLASS
&& init
->ts
.type
!= BT_CLASS
1337 && !sym
->attr
.proc_pointer
1338 && gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1341 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.u
.cl
1342 && init
->ts
.type
== BT_CHARACTER
)
1344 /* Update symbol character length according initializer. */
1345 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1348 if (sym
->ts
.u
.cl
->length
== NULL
)
1351 /* If there are multiple CHARACTER variables declared on the
1352 same line, we don't want them to share the same length. */
1353 sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1355 if (sym
->attr
.flavor
== FL_PARAMETER
)
1357 if (init
->expr_type
== EXPR_CONSTANT
)
1359 clen
= init
->value
.character
.length
;
1360 sym
->ts
.u
.cl
->length
1361 = gfc_get_int_expr (gfc_default_integer_kind
,
1364 else if (init
->expr_type
== EXPR_ARRAY
)
1367 c
= gfc_constructor_first (init
->value
.constructor
);
1368 clen
= c
->expr
->value
.character
.length
;
1369 sym
->ts
.u
.cl
->length
1370 = gfc_get_int_expr (gfc_default_integer_kind
,
1373 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
1374 sym
->ts
.u
.cl
->length
=
1375 gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
1378 /* Update initializer character length according symbol. */
1379 else if (sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1381 int len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
1383 if (init
->expr_type
== EXPR_CONSTANT
)
1384 gfc_set_constant_character_len (len
, init
, -1);
1385 else if (init
->expr_type
== EXPR_ARRAY
)
1389 /* Build a new charlen to prevent simplification from
1390 deleting the length before it is resolved. */
1391 init
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1392 init
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->ts
.u
.cl
->length
);
1394 for (c
= gfc_constructor_first (init
->value
.constructor
);
1395 c
; c
= gfc_constructor_next (c
))
1396 gfc_set_constant_character_len (len
, c
->expr
, -1);
1401 /* If sym is implied-shape, set its upper bounds from init. */
1402 if (sym
->attr
.flavor
== FL_PARAMETER
&& sym
->attr
.dimension
1403 && sym
->as
->type
== AS_IMPLIED_SHAPE
)
1407 if (init
->rank
== 0)
1409 gfc_error ("Can't initialize implied-shape array at %L"
1410 " with scalar", &sym
->declared_at
);
1413 gcc_assert (sym
->as
->rank
== init
->rank
);
1415 /* Shape should be present, we get an initialization expression. */
1416 gcc_assert (init
->shape
);
1418 for (dim
= 0; dim
< sym
->as
->rank
; ++dim
)
1424 lower
= sym
->as
->lower
[dim
];
1425 if (lower
->expr_type
!= EXPR_CONSTANT
)
1427 gfc_error ("Non-constant lower bound in implied-shape"
1428 " declaration at %L", &lower
->where
);
1432 /* All dimensions must be without upper bound. */
1433 gcc_assert (!sym
->as
->upper
[dim
]);
1436 e
= gfc_get_constant_expr (BT_INTEGER
, k
, &sym
->declared_at
);
1437 mpz_add (e
->value
.integer
,
1438 lower
->value
.integer
, init
->shape
[dim
]);
1439 mpz_sub_ui (e
->value
.integer
, e
->value
.integer
, 1);
1440 sym
->as
->upper
[dim
] = e
;
1443 sym
->as
->type
= AS_EXPLICIT
;
1446 /* Need to check if the expression we initialized this
1447 to was one of the iso_c_binding named constants. If so,
1448 and we're a parameter (constant), let it be iso_c.
1450 integer(c_int), parameter :: my_int = c_int
1451 integer(my_int) :: my_int_2
1452 If we mark my_int as iso_c (since we can see it's value
1453 is equal to one of the named constants), then my_int_2
1454 will be considered C interoperable. */
1455 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1457 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1458 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1459 /* attr bits needed for module files. */
1460 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1461 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1462 if (init
->ts
.is_iso_c
)
1463 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1466 /* Add initializer. Make sure we keep the ranks sane. */
1467 if (sym
->attr
.dimension
&& init
->rank
== 0)
1472 if (sym
->attr
.flavor
== FL_PARAMETER
1473 && init
->expr_type
== EXPR_CONSTANT
1474 && spec_size (sym
->as
, &size
) == SUCCESS
1475 && mpz_cmp_si (size
, 0) > 0)
1477 array
= gfc_get_array_expr (init
->ts
.type
, init
->ts
.kind
,
1479 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1480 gfc_constructor_append_expr (&array
->value
.constructor
,
1483 : gfc_copy_expr (init
),
1486 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1487 for (n
= 0; n
< sym
->as
->rank
; n
++)
1488 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1493 init
->rank
= sym
->as
->rank
;
1497 if (sym
->attr
.save
== SAVE_NONE
)
1498 sym
->attr
.save
= SAVE_IMPLICIT
;
1506 /* Function called by variable_decl() that adds a name to a structure
1510 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1511 gfc_array_spec
**as
)
1514 gfc_try t
= SUCCESS
;
1516 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1517 constructing, it must have the pointer attribute. */
1518 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1519 && current_ts
.u
.derived
== gfc_current_block ()
1520 && current_attr
.pointer
== 0)
1522 gfc_error ("Component at %C must have the POINTER attribute");
1526 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1528 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1530 gfc_error ("Array component of structure at %C must have explicit "
1531 "or deferred shape");
1536 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
1540 if (c
->ts
.type
== BT_CHARACTER
)
1542 c
->attr
= current_attr
;
1544 c
->initializer
= *init
;
1551 c
->attr
.codimension
= 1;
1553 c
->attr
.dimension
= 1;
1557 /* Should this ever get more complicated, combine with similar section
1558 in add_init_expr_to_sym into a separate function. */
1559 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
&& c
->ts
.u
.cl
1560 && c
->ts
.u
.cl
->length
&& c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1564 gcc_assert (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
);
1565 gcc_assert (c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1566 gcc_assert (c
->ts
.u
.cl
->length
->ts
.type
== BT_INTEGER
);
1568 len
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
1570 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1571 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1572 else if (mpz_cmp (c
->ts
.u
.cl
->length
->value
.integer
,
1573 c
->initializer
->ts
.u
.cl
->length
->value
.integer
))
1575 gfc_constructor
*ctor
;
1576 ctor
= gfc_constructor_first (c
->initializer
->value
.constructor
);
1581 bool has_ts
= (c
->initializer
->ts
.u
.cl
1582 && c
->initializer
->ts
.u
.cl
->length_from_typespec
);
1584 /* Remember the length of the first element for checking
1585 that all elements *in the constructor* have the same
1586 length. This need not be the length of the LHS! */
1587 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1588 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1589 first_len
= ctor
->expr
->value
.character
.length
;
1591 for ( ; ctor
; ctor
= gfc_constructor_next (ctor
))
1592 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1594 gfc_set_constant_character_len (len
, ctor
->expr
,
1595 has_ts
? -1 : first_len
);
1596 ctor
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (c
->ts
.u
.cl
->length
);
1602 /* Check array components. */
1603 if (!c
->attr
.dimension
)
1606 if (c
->attr
.pointer
)
1608 if (c
->as
->type
!= AS_DEFERRED
)
1610 gfc_error ("Pointer array component of structure at %C must have a "
1615 else if (c
->attr
.allocatable
)
1617 if (c
->as
->type
!= AS_DEFERRED
)
1619 gfc_error ("Allocatable component of structure at %C must have a "
1626 if (c
->as
->type
!= AS_EXPLICIT
)
1628 gfc_error ("Array component of structure at %C must have an "
1635 if (c
->ts
.type
== BT_CLASS
)
1637 bool delayed
= (gfc_state_stack
->sym
== c
->ts
.u
.derived
)
1638 || (!c
->ts
.u
.derived
->components
1639 && !c
->ts
.u
.derived
->attr
.zero_comp
);
1640 return gfc_build_class_symbol (&c
->ts
, &c
->attr
, &c
->as
, delayed
);
1647 /* Match a 'NULL()', and possibly take care of some side effects. */
1650 gfc_match_null (gfc_expr
**result
)
1655 m
= gfc_match (" null ( )");
1659 /* The NULL symbol now has to be/become an intrinsic function. */
1660 if (gfc_get_symbol ("null", NULL
, &sym
))
1662 gfc_error ("NULL() initialization at %C is ambiguous");
1666 gfc_intrinsic_symbol (sym
);
1668 if (sym
->attr
.proc
!= PROC_INTRINSIC
1669 && (gfc_add_procedure (&sym
->attr
, PROC_INTRINSIC
,
1670 sym
->name
, NULL
) == FAILURE
1671 || gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
))
1674 *result
= gfc_get_null_expr (&gfc_current_locus
);
1680 /* Match the initialization expr for a data pointer or procedure pointer. */
1683 match_pointer_init (gfc_expr
**init
, int procptr
)
1687 if (gfc_pure (NULL
) && gfc_state_stack
->state
!= COMP_DERIVED
)
1689 gfc_error ("Initialization of pointer at %C is not allowed in "
1690 "a PURE procedure");
1694 /* Match NULL() initilization. */
1695 m
= gfc_match_null (init
);
1699 /* Match non-NULL initialization. */
1700 gfc_matching_ptr_assignment
= !procptr
;
1701 gfc_matching_procptr_assignment
= procptr
;
1702 m
= gfc_match_rvalue (init
);
1703 gfc_matching_ptr_assignment
= 0;
1704 gfc_matching_procptr_assignment
= 0;
1705 if (m
== MATCH_ERROR
)
1707 else if (m
== MATCH_NO
)
1709 gfc_error ("Error in pointer initialization at %C");
1714 gfc_resolve_expr (*init
);
1716 if (gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: non-NULL pointer "
1717 "initialization at %C") == FAILURE
)
1724 /* Match a variable name with an optional initializer. When this
1725 subroutine is called, a variable is expected to be parsed next.
1726 Depending on what is happening at the moment, updates either the
1727 symbol table or the current interface. */
1730 variable_decl (int elem
)
1732 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1733 gfc_expr
*initializer
, *char_len
;
1735 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1747 /* When we get here, we've just matched a list of attributes and
1748 maybe a type and a double colon. The next thing we expect to see
1749 is the name of the symbol. */
1750 m
= gfc_match_name (name
);
1754 var_locus
= gfc_current_locus
;
1756 /* Now we could see the optional array spec. or character length. */
1757 m
= gfc_match_array_spec (&as
, true, true);
1758 if (gfc_option
.flag_cray_pointer
&& m
== MATCH_YES
)
1759 cp_as
= gfc_copy_array_spec (as
);
1760 else if (m
== MATCH_ERROR
)
1764 as
= gfc_copy_array_spec (current_as
);
1765 else if (current_as
)
1766 merge_array_spec (current_as
, as
, true);
1768 /* At this point, we know for sure if the symbol is PARAMETER and can thus
1769 determine (and check) whether it can be implied-shape. If it
1770 was parsed as assumed-size, change it because PARAMETERs can not
1774 if (as
->type
== AS_IMPLIED_SHAPE
&& current_attr
.flavor
!= FL_PARAMETER
)
1777 gfc_error ("Non-PARAMETER symbol '%s' at %L can't be implied-shape",
1782 if (as
->type
== AS_ASSUMED_SIZE
&& as
->rank
== 1
1783 && current_attr
.flavor
== FL_PARAMETER
)
1784 as
->type
= AS_IMPLIED_SHAPE
;
1786 if (as
->type
== AS_IMPLIED_SHAPE
1787 && gfc_notify_std (GFC_STD_F2008
,
1788 "Fortran 2008: Implied-shape array at %L",
1789 &var_locus
) == FAILURE
)
1798 cl_deferred
= false;
1800 if (current_ts
.type
== BT_CHARACTER
)
1802 switch (match_char_length (&char_len
, &cl_deferred
))
1805 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1807 cl
->length
= char_len
;
1810 /* Non-constant lengths need to be copied after the first
1811 element. Also copy assumed lengths. */
1814 && (current_ts
.u
.cl
->length
== NULL
1815 || current_ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1817 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1818 cl
->length
= gfc_copy_expr (current_ts
.u
.cl
->length
);
1821 cl
= current_ts
.u
.cl
;
1823 cl_deferred
= current_ts
.deferred
;
1832 /* If this symbol has already shown up in a Cray Pointer declaration,
1833 then we want to set the type & bail out. */
1834 if (gfc_option
.flag_cray_pointer
)
1836 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1837 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
1839 sym
->ts
.type
= current_ts
.type
;
1840 sym
->ts
.kind
= current_ts
.kind
;
1842 sym
->ts
.u
.derived
= current_ts
.u
.derived
;
1843 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
1844 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
1847 /* Check to see if we have an array specification. */
1850 if (sym
->as
!= NULL
)
1852 gfc_error ("Duplicate array spec for Cray pointee at %C");
1853 gfc_free_array_spec (cp_as
);
1859 if (gfc_set_array_spec (sym
, cp_as
, &var_locus
) == FAILURE
)
1860 gfc_internal_error ("Couldn't set pointee array spec.");
1862 /* Fix the array spec. */
1863 m
= gfc_mod_pointee_as (sym
->as
);
1864 if (m
== MATCH_ERROR
)
1872 gfc_free_array_spec (cp_as
);
1876 /* Procedure pointer as function result. */
1877 if (gfc_current_state () == COMP_FUNCTION
1878 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
1879 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
1880 strcpy (name
, "ppr@");
1882 if (gfc_current_state () == COMP_FUNCTION
1883 && strcmp (name
, gfc_current_block ()->name
) == 0
1884 && gfc_current_block ()->result
1885 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
1886 strcpy (name
, "ppr@");
1888 /* OK, we've successfully matched the declaration. Now put the
1889 symbol in the current namespace, because it might be used in the
1890 optional initialization expression for this symbol, e.g. this is
1893 integer, parameter :: i = huge(i)
1895 This is only true for parameters or variables of a basic type.
1896 For components of derived types, it is not true, so we don't
1897 create a symbol for those yet. If we fail to create the symbol,
1899 if (gfc_current_state () != COMP_DERIVED
1900 && build_sym (name
, cl
, cl_deferred
, &as
, &var_locus
) == FAILURE
)
1906 /* An interface body specifies all of the procedure's
1907 characteristics and these shall be consistent with those
1908 specified in the procedure definition, except that the interface
1909 may specify a procedure that is not pure if the procedure is
1910 defined to be pure(12.3.2). */
1911 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1912 && gfc_current_ns
->proc_name
1913 && gfc_current_ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
1914 && current_ts
.u
.derived
->ns
!= gfc_current_ns
)
1917 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, current_ts
.u
.derived
->name
);
1918 if (!(current_ts
.u
.derived
->attr
.imported
1920 && st
->n
.sym
== current_ts
.u
.derived
)
1921 && !gfc_current_ns
->has_import_set
)
1923 gfc_error ("the type of '%s' at %C has not been declared within the "
1930 /* In functions that have a RESULT variable defined, the function
1931 name always refers to function calls. Therefore, the name is
1932 not allowed to appear in specification statements. */
1933 if (gfc_current_state () == COMP_FUNCTION
1934 && gfc_current_block () != NULL
1935 && gfc_current_block ()->result
!= NULL
1936 && gfc_current_block ()->result
!= gfc_current_block ()
1937 && strcmp (gfc_current_block ()->name
, name
) == 0)
1939 gfc_error ("Function name '%s' not allowed at %C", name
);
1944 /* We allow old-style initializations of the form
1945 integer i /2/, j(4) /3*3, 1/
1946 (if no colon has been seen). These are different from data
1947 statements in that initializers are only allowed to apply to the
1948 variable immediately preceding, i.e.
1950 is not allowed. Therefore we have to do some work manually, that
1951 could otherwise be left to the matchers for DATA statements. */
1953 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
1955 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Old-style "
1956 "initialization at %C") == FAILURE
)
1959 return match_old_style_init (name
);
1962 /* The double colon must be present in order to have initializers.
1963 Otherwise the statement is ambiguous with an assignment statement. */
1966 if (gfc_match (" =>") == MATCH_YES
)
1968 if (!current_attr
.pointer
)
1970 gfc_error ("Initialization at %C isn't for a pointer variable");
1975 m
= match_pointer_init (&initializer
, 0);
1979 else if (gfc_match_char ('=') == MATCH_YES
)
1981 if (current_attr
.pointer
)
1983 gfc_error ("Pointer initialization at %C requires '=>', "
1989 m
= gfc_match_init_expr (&initializer
);
1992 gfc_error ("Expected an initialization expression at %C");
1996 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
)
1997 && gfc_state_stack
->state
!= COMP_DERIVED
)
1999 gfc_error ("Initialization of variable at %C is not allowed in "
2000 "a PURE procedure");
2009 if (initializer
!= NULL
&& current_attr
.allocatable
2010 && gfc_current_state () == COMP_DERIVED
)
2012 gfc_error ("Initialization of allocatable component at %C is not "
2018 /* Add the initializer. Note that it is fine if initializer is
2019 NULL here, because we sometimes also need to check if a
2020 declaration *must* have an initialization expression. */
2021 if (gfc_current_state () != COMP_DERIVED
)
2022 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
2025 if (current_ts
.type
== BT_DERIVED
2026 && !current_attr
.pointer
&& !initializer
)
2027 initializer
= gfc_default_initializer (¤t_ts
);
2028 t
= build_struct (name
, cl
, &initializer
, &as
);
2031 m
= (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
2034 /* Free stuff up and return. */
2035 gfc_free_expr (initializer
);
2036 gfc_free_array_spec (as
);
2042 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
2043 This assumes that the byte size is equal to the kind number for
2044 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
2047 gfc_match_old_kind_spec (gfc_typespec
*ts
)
2052 if (gfc_match_char ('*') != MATCH_YES
)
2055 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
2059 original_kind
= ts
->kind
;
2061 /* Massage the kind numbers for complex types. */
2062 if (ts
->type
== BT_COMPLEX
)
2066 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2067 gfc_basic_typename (ts
->type
), original_kind
);
2073 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2075 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2076 gfc_basic_typename (ts
->type
), original_kind
);
2080 if (gfc_notify_std (GFC_STD_GNU
, "Nonstandard type declaration %s*%d at %C",
2081 gfc_basic_typename (ts
->type
), original_kind
) == FAILURE
)
2088 /* Match a kind specification. Since kinds are generally optional, we
2089 usually return MATCH_NO if something goes wrong. If a "kind="
2090 string is found, then we know we have an error. */
2093 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
2105 where
= loc
= gfc_current_locus
;
2110 if (gfc_match_char ('(') == MATCH_NO
)
2113 /* Also gobbles optional text. */
2114 if (gfc_match (" kind = ") == MATCH_YES
)
2117 loc
= gfc_current_locus
;
2120 n
= gfc_match_init_expr (&e
);
2124 if (gfc_matching_function
)
2126 /* The function kind expression might include use associated or
2127 imported parameters and try again after the specification
2129 if (gfc_match_char (')') != MATCH_YES
)
2131 gfc_error ("Missing right parenthesis at %C");
2137 gfc_undo_symbols ();
2142 /* ....or else, the match is real. */
2144 gfc_error ("Expected initialization expression at %C");
2152 gfc_error ("Expected scalar initialization expression at %C");
2157 msg
= gfc_extract_int (e
, &ts
->kind
);
2166 /* Before throwing away the expression, let's see if we had a
2167 C interoperable kind (and store the fact). */
2168 if (e
->ts
.is_c_interop
== 1)
2170 /* Mark this as c interoperable if being declared with one
2171 of the named constants from iso_c_binding. */
2172 ts
->is_c_interop
= e
->ts
.is_iso_c
;
2173 ts
->f90_type
= e
->ts
.f90_type
;
2179 /* Ignore errors to this point, if we've gotten here. This means
2180 we ignore the m=MATCH_ERROR from above. */
2181 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2183 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
2184 gfc_basic_typename (ts
->type
));
2185 gfc_current_locus
= where
;
2189 /* Warn if, e.g., c_int is used for a REAL variable, but not
2190 if, e.g., c_double is used for COMPLEX as the standard
2191 explicitly says that the kind type parameter for complex and real
2192 variable is the same, i.e. c_float == c_float_complex. */
2193 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2194 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2195 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2196 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2197 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2198 gfc_basic_typename (ts
->type
));
2200 gfc_gobble_whitespace ();
2201 if ((c
= gfc_next_ascii_char ()) != ')'
2202 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2204 if (ts
->type
== BT_CHARACTER
)
2205 gfc_error ("Missing right parenthesis or comma at %C");
2207 gfc_error ("Missing right parenthesis at %C");
2211 /* All tests passed. */
2214 if(m
== MATCH_ERROR
)
2215 gfc_current_locus
= where
;
2217 /* Return what we know from the test(s). */
2222 gfc_current_locus
= where
;
2228 match_char_kind (int * kind
, int * is_iso_c
)
2237 where
= gfc_current_locus
;
2239 n
= gfc_match_init_expr (&e
);
2241 if (n
!= MATCH_YES
&& gfc_matching_function
)
2243 /* The expression might include use-associated or imported
2244 parameters and try again after the specification
2247 gfc_undo_symbols ();
2252 gfc_error ("Expected initialization expression at %C");
2258 gfc_error ("Expected scalar initialization expression at %C");
2263 msg
= gfc_extract_int (e
, kind
);
2264 *is_iso_c
= e
->ts
.is_iso_c
;
2274 /* Ignore errors to this point, if we've gotten here. This means
2275 we ignore the m=MATCH_ERROR from above. */
2276 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2278 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2282 /* All tests passed. */
2285 if (m
== MATCH_ERROR
)
2286 gfc_current_locus
= where
;
2288 /* Return what we know from the test(s). */
2293 gfc_current_locus
= where
;
2298 /* Match the various kind/length specifications in a CHARACTER
2299 declaration. We don't return MATCH_NO. */
2302 gfc_match_char_spec (gfc_typespec
*ts
)
2304 int kind
, seen_length
, is_iso_c
;
2316 /* Try the old-style specification first. */
2317 old_char_selector
= 0;
2319 m
= match_char_length (&len
, &deferred
);
2323 old_char_selector
= 1;
2328 m
= gfc_match_char ('(');
2331 m
= MATCH_YES
; /* Character without length is a single char. */
2335 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2336 if (gfc_match (" kind =") == MATCH_YES
)
2338 m
= match_char_kind (&kind
, &is_iso_c
);
2340 if (m
== MATCH_ERROR
)
2345 if (gfc_match (" , len =") == MATCH_NO
)
2348 m
= char_len_param_value (&len
, &deferred
);
2351 if (m
== MATCH_ERROR
)
2358 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2359 if (gfc_match (" len =") == MATCH_YES
)
2361 m
= char_len_param_value (&len
, &deferred
);
2364 if (m
== MATCH_ERROR
)
2368 if (gfc_match_char (')') == MATCH_YES
)
2371 if (gfc_match (" , kind =") != MATCH_YES
)
2374 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2380 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2381 m
= char_len_param_value (&len
, &deferred
);
2384 if (m
== MATCH_ERROR
)
2388 m
= gfc_match_char (')');
2392 if (gfc_match_char (',') != MATCH_YES
)
2395 gfc_match (" kind ="); /* Gobble optional text. */
2397 m
= match_char_kind (&kind
, &is_iso_c
);
2398 if (m
== MATCH_ERROR
)
2404 /* Require a right-paren at this point. */
2405 m
= gfc_match_char (')');
2410 gfc_error ("Syntax error in CHARACTER declaration at %C");
2412 gfc_free_expr (len
);
2416 /* Deal with character functions after USE and IMPORT statements. */
2417 if (gfc_matching_function
)
2419 gfc_free_expr (len
);
2420 gfc_undo_symbols ();
2426 gfc_free_expr (len
);
2430 /* Do some final massaging of the length values. */
2431 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2433 if (seen_length
== 0)
2434 cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
2439 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2440 ts
->deferred
= deferred
;
2442 /* We have to know if it was a c interoperable kind so we can
2443 do accurate type checking of bind(c) procs, etc. */
2445 /* Mark this as c interoperable if being declared with one
2446 of the named constants from iso_c_binding. */
2447 ts
->is_c_interop
= is_iso_c
;
2448 else if (len
!= NULL
)
2449 /* Here, we might have parsed something such as: character(c_char)
2450 In this case, the parsing code above grabs the c_char when
2451 looking for the length (line 1690, roughly). it's the last
2452 testcase for parsing the kind params of a character variable.
2453 However, it's not actually the length. this seems like it
2455 To see if the user used a C interop kind, test the expr
2456 of the so called length, and see if it's C interoperable. */
2457 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2463 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2464 structure to the matched specification. This is necessary for FUNCTION and
2465 IMPLICIT statements.
2467 If implicit_flag is nonzero, then we don't check for the optional
2468 kind specification. Not doing so is needed for matching an IMPLICIT
2469 statement correctly. */
2472 gfc_match_decl_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2474 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2478 bool seen_deferred_kind
, matched_type
;
2480 /* A belt and braces check that the typespec is correctly being treated
2481 as a deferred characteristic association. */
2482 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2483 && (gfc_current_block ()->result
->ts
.kind
== -1)
2484 && (ts
->kind
== -1);
2486 if (seen_deferred_kind
)
2489 /* Clear the current binding label, in case one is given. */
2490 curr_binding_label
[0] = '\0';
2492 if (gfc_match (" byte") == MATCH_YES
)
2494 if (gfc_notify_std (GFC_STD_GNU
, "Extension: BYTE type at %C")
2498 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2500 gfc_error ("BYTE type used at %C "
2501 "is not available on the target machine");
2505 ts
->type
= BT_INTEGER
;
2511 m
= gfc_match (" type ( %n", name
);
2512 matched_type
= (m
== MATCH_YES
);
2514 if ((matched_type
&& strcmp ("integer", name
) == 0)
2515 || (!matched_type
&& gfc_match (" integer") == MATCH_YES
))
2517 ts
->type
= BT_INTEGER
;
2518 ts
->kind
= gfc_default_integer_kind
;
2522 if ((matched_type
&& strcmp ("character", name
) == 0)
2523 || (!matched_type
&& gfc_match (" character") == MATCH_YES
))
2526 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2527 "intrinsic-type-spec at %C") == FAILURE
)
2530 ts
->type
= BT_CHARACTER
;
2531 if (implicit_flag
== 0)
2532 m
= gfc_match_char_spec (ts
);
2536 if (matched_type
&& m
== MATCH_YES
&& gfc_match_char (')') != MATCH_YES
)
2542 if ((matched_type
&& strcmp ("real", name
) == 0)
2543 || (!matched_type
&& gfc_match (" real") == MATCH_YES
))
2546 ts
->kind
= gfc_default_real_kind
;
2551 && (strcmp ("doubleprecision", name
) == 0
2552 || (strcmp ("double", name
) == 0
2553 && gfc_match (" precision") == MATCH_YES
)))
2554 || (!matched_type
&& gfc_match (" double precision") == MATCH_YES
))
2557 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2558 "intrinsic-type-spec at %C") == FAILURE
)
2560 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2564 ts
->kind
= gfc_default_double_kind
;
2568 if ((matched_type
&& strcmp ("complex", name
) == 0)
2569 || (!matched_type
&& gfc_match (" complex") == MATCH_YES
))
2571 ts
->type
= BT_COMPLEX
;
2572 ts
->kind
= gfc_default_complex_kind
;
2577 && (strcmp ("doublecomplex", name
) == 0
2578 || (strcmp ("double", name
) == 0
2579 && gfc_match (" complex") == MATCH_YES
)))
2580 || (!matched_type
&& gfc_match (" double complex") == MATCH_YES
))
2582 if (gfc_notify_std (GFC_STD_GNU
, "Extension: DOUBLE COMPLEX at %C")
2587 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2588 "intrinsic-type-spec at %C") == FAILURE
)
2591 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2594 ts
->type
= BT_COMPLEX
;
2595 ts
->kind
= gfc_default_double_kind
;
2599 if ((matched_type
&& strcmp ("logical", name
) == 0)
2600 || (!matched_type
&& gfc_match (" logical") == MATCH_YES
))
2602 ts
->type
= BT_LOGICAL
;
2603 ts
->kind
= gfc_default_logical_kind
;
2608 m
= gfc_match_char (')');
2611 ts
->type
= BT_DERIVED
;
2614 /* Match CLASS declarations. */
2615 m
= gfc_match (" class ( * )");
2616 if (m
== MATCH_ERROR
)
2618 else if (m
== MATCH_YES
)
2620 gfc_fatal_error ("Unlimited polymorphism at %C not yet supported");
2624 m
= gfc_match (" class ( %n )", name
);
2627 ts
->type
= BT_CLASS
;
2629 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: CLASS statement at %C")
2634 /* Defer association of the derived type until the end of the
2635 specification block. However, if the derived type can be
2636 found, add it to the typespec. */
2637 if (gfc_matching_function
)
2639 ts
->u
.derived
= NULL
;
2640 if (gfc_current_state () != COMP_INTERFACE
2641 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2642 ts
->u
.derived
= sym
;
2646 /* Search for the name but allow the components to be defined later. If
2647 type = -1, this typespec has been seen in a function declaration but
2648 the type could not be accessed at that point. */
2650 if (ts
->kind
!= -1 && gfc_get_ha_symbol (name
, &sym
))
2652 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2655 else if (ts
->kind
== -1)
2657 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2658 || gfc_current_ns
->has_import_set
;
2659 if (gfc_find_symbol (name
, NULL
, iface
, &sym
))
2661 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2670 if (sym
->attr
.flavor
!= FL_DERIVED
2671 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
2674 gfc_set_sym_referenced (sym
);
2675 ts
->u
.derived
= sym
;
2681 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: TYPE with "
2682 "intrinsic-type-spec at %C") == FAILURE
)
2685 /* For all types except double, derived and character, look for an
2686 optional kind specifier. MATCH_NO is actually OK at this point. */
2687 if (implicit_flag
== 1)
2689 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2695 if (gfc_current_form
== FORM_FREE
)
2697 c
= gfc_peek_ascii_char ();
2698 if (!gfc_is_whitespace (c
) && c
!= '*' && c
!= '('
2699 && c
!= ':' && c
!= ',')
2701 if (matched_type
&& c
== ')')
2703 gfc_next_ascii_char ();
2710 m
= gfc_match_kind_spec (ts
, false);
2711 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2712 m
= gfc_match_old_kind_spec (ts
);
2714 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2717 /* Defer association of the KIND expression of function results
2718 until after USE and IMPORT statements. */
2719 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2720 || gfc_matching_function
)
2724 m
= MATCH_YES
; /* No kind specifier found. */
2730 /* Match an IMPLICIT NONE statement. Actually, this statement is
2731 already matched in parse.c, or we would not end up here in the
2732 first place. So the only thing we need to check, is if there is
2733 trailing garbage. If not, the match is successful. */
2736 gfc_match_implicit_none (void)
2738 return (gfc_match_eos () == MATCH_YES
) ? MATCH_YES
: MATCH_NO
;
2742 /* Match the letter range(s) of an IMPLICIT statement. */
2745 match_implicit_range (void)
2751 cur_loc
= gfc_current_locus
;
2753 gfc_gobble_whitespace ();
2754 c
= gfc_next_ascii_char ();
2757 gfc_error ("Missing character range in IMPLICIT at %C");
2764 gfc_gobble_whitespace ();
2765 c1
= gfc_next_ascii_char ();
2769 gfc_gobble_whitespace ();
2770 c
= gfc_next_ascii_char ();
2775 inner
= 0; /* Fall through. */
2782 gfc_gobble_whitespace ();
2783 c2
= gfc_next_ascii_char ();
2787 gfc_gobble_whitespace ();
2788 c
= gfc_next_ascii_char ();
2790 if ((c
!= ',') && (c
!= ')'))
2803 gfc_error ("Letters must be in alphabetic order in "
2804 "IMPLICIT statement at %C");
2808 /* See if we can add the newly matched range to the pending
2809 implicits from this IMPLICIT statement. We do not check for
2810 conflicts with whatever earlier IMPLICIT statements may have
2811 set. This is done when we've successfully finished matching
2813 if (gfc_add_new_implicit_range (c1
, c2
) != SUCCESS
)
2820 gfc_syntax_error (ST_IMPLICIT
);
2822 gfc_current_locus
= cur_loc
;
2827 /* Match an IMPLICIT statement, storing the types for
2828 gfc_set_implicit() if the statement is accepted by the parser.
2829 There is a strange looking, but legal syntactic construction
2830 possible. It looks like:
2832 IMPLICIT INTEGER (a-b) (c-d)
2834 This is legal if "a-b" is a constant expression that happens to
2835 equal one of the legal kinds for integers. The real problem
2836 happens with an implicit specification that looks like:
2838 IMPLICIT INTEGER (a-b)
2840 In this case, a typespec matcher that is "greedy" (as most of the
2841 matchers are) gobbles the character range as a kindspec, leaving
2842 nothing left. We therefore have to go a bit more slowly in the
2843 matching process by inhibiting the kindspec checking during
2844 typespec matching and checking for a kind later. */
2847 gfc_match_implicit (void)
2856 /* We don't allow empty implicit statements. */
2857 if (gfc_match_eos () == MATCH_YES
)
2859 gfc_error ("Empty IMPLICIT statement at %C");
2865 /* First cleanup. */
2866 gfc_clear_new_implicit ();
2868 /* A basic type is mandatory here. */
2869 m
= gfc_match_decl_type_spec (&ts
, 1);
2870 if (m
== MATCH_ERROR
)
2875 cur_loc
= gfc_current_locus
;
2876 m
= match_implicit_range ();
2880 /* We may have <TYPE> (<RANGE>). */
2881 gfc_gobble_whitespace ();
2882 c
= gfc_next_ascii_char ();
2883 if ((c
== '\n') || (c
== ','))
2885 /* Check for CHARACTER with no length parameter. */
2886 if (ts
.type
== BT_CHARACTER
&& !ts
.u
.cl
)
2888 ts
.kind
= gfc_default_character_kind
;
2889 ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2890 ts
.u
.cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
,
2894 /* Record the Successful match. */
2895 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2900 gfc_current_locus
= cur_loc
;
2903 /* Discard the (incorrectly) matched range. */
2904 gfc_clear_new_implicit ();
2906 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2907 if (ts
.type
== BT_CHARACTER
)
2908 m
= gfc_match_char_spec (&ts
);
2911 m
= gfc_match_kind_spec (&ts
, false);
2914 m
= gfc_match_old_kind_spec (&ts
);
2915 if (m
== MATCH_ERROR
)
2921 if (m
== MATCH_ERROR
)
2924 m
= match_implicit_range ();
2925 if (m
== MATCH_ERROR
)
2930 gfc_gobble_whitespace ();
2931 c
= gfc_next_ascii_char ();
2932 if ((c
!= '\n') && (c
!= ','))
2935 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2943 gfc_syntax_error (ST_IMPLICIT
);
2951 gfc_match_import (void)
2953 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2958 if (gfc_current_ns
->proc_name
== NULL
2959 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
2961 gfc_error ("IMPORT statement at %C only permitted in "
2962 "an INTERFACE body");
2966 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IMPORT statement at %C")
2970 if (gfc_match_eos () == MATCH_YES
)
2972 /* All host variables should be imported. */
2973 gfc_current_ns
->has_import_set
= 1;
2977 if (gfc_match (" ::") == MATCH_YES
)
2979 if (gfc_match_eos () == MATCH_YES
)
2981 gfc_error ("Expecting list of named entities at %C");
2988 m
= gfc_match (" %n", name
);
2992 if (gfc_current_ns
->parent
!= NULL
2993 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
2995 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2998 else if (gfc_current_ns
->proc_name
->ns
->parent
!= NULL
2999 && gfc_find_symbol (name
,
3000 gfc_current_ns
->proc_name
->ns
->parent
,
3003 gfc_error ("Type name '%s' at %C is ambiguous", name
);
3009 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
3010 "at %C - does not exist.", name
);
3014 if (gfc_find_symtree (gfc_current_ns
->sym_root
,name
))
3016 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
3021 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, sym
->name
);
3024 sym
->attr
.imported
= 1;
3036 if (gfc_match_eos () == MATCH_YES
)
3038 if (gfc_match_char (',') != MATCH_YES
)
3045 gfc_error ("Syntax error in IMPORT statement at %C");
3050 /* A minimal implementation of gfc_match without whitespace, escape
3051 characters or variable arguments. Returns true if the next
3052 characters match the TARGET template exactly. */
3055 match_string_p (const char *target
)
3059 for (p
= target
; *p
; p
++)
3060 if ((char) gfc_next_ascii_char () != *p
)
3065 /* Matches an attribute specification including array specs. If
3066 successful, leaves the variables current_attr and current_as
3067 holding the specification. Also sets the colon_seen variable for
3068 later use by matchers associated with initializations.
3070 This subroutine is a little tricky in the sense that we don't know
3071 if we really have an attr-spec until we hit the double colon.
3072 Until that time, we can only return MATCH_NO. This forces us to
3073 check for duplicate specification at this level. */
3076 match_attr_spec (void)
3078 /* Modifiers that can exist in a type statement. */
3080 { GFC_DECL_BEGIN
= 0,
3081 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
3082 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
3083 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
3084 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
3085 DECL_IS_BIND_C
, DECL_CODIMENSION
, DECL_ASYNCHRONOUS
, DECL_CONTIGUOUS
,
3086 DECL_NONE
, GFC_DECL_END
/* Sentinel */
3090 /* GFC_DECL_END is the sentinel, index starts at 0. */
3091 #define NUM_DECL GFC_DECL_END
3093 locus start
, seen_at
[NUM_DECL
];
3100 gfc_clear_attr (¤t_attr
);
3101 start
= gfc_current_locus
;
3106 /* See if we get all of the keywords up to the final double colon. */
3107 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3115 gfc_gobble_whitespace ();
3117 ch
= gfc_next_ascii_char ();
3120 /* This is the successful exit condition for the loop. */
3121 if (gfc_next_ascii_char () == ':')
3126 gfc_gobble_whitespace ();
3127 switch (gfc_peek_ascii_char ())
3130 gfc_next_ascii_char ();
3131 switch (gfc_next_ascii_char ())
3134 if (match_string_p ("locatable"))
3136 /* Matched "allocatable". */
3137 d
= DECL_ALLOCATABLE
;
3142 if (match_string_p ("ynchronous"))
3144 /* Matched "asynchronous". */
3145 d
= DECL_ASYNCHRONOUS
;
3152 /* Try and match the bind(c). */
3153 m
= gfc_match_bind_c (NULL
, true);
3156 else if (m
== MATCH_ERROR
)
3161 gfc_next_ascii_char ();
3162 if ('o' != gfc_next_ascii_char ())
3164 switch (gfc_next_ascii_char ())
3167 if (match_string_p ("imension"))
3169 d
= DECL_CODIMENSION
;
3173 if (match_string_p ("tiguous"))
3175 d
= DECL_CONTIGUOUS
;
3182 if (match_string_p ("dimension"))
3187 if (match_string_p ("external"))
3192 if (match_string_p ("int"))
3194 ch
= gfc_next_ascii_char ();
3197 if (match_string_p ("nt"))
3199 /* Matched "intent". */
3200 /* TODO: Call match_intent_spec from here. */
3201 if (gfc_match (" ( in out )") == MATCH_YES
)
3203 else if (gfc_match (" ( in )") == MATCH_YES
)
3205 else if (gfc_match (" ( out )") == MATCH_YES
)
3211 if (match_string_p ("insic"))
3213 /* Matched "intrinsic". */
3221 if (match_string_p ("optional"))
3226 gfc_next_ascii_char ();
3227 switch (gfc_next_ascii_char ())
3230 if (match_string_p ("rameter"))
3232 /* Matched "parameter". */
3238 if (match_string_p ("inter"))
3240 /* Matched "pointer". */
3246 ch
= gfc_next_ascii_char ();
3249 if (match_string_p ("vate"))
3251 /* Matched "private". */
3257 if (match_string_p ("tected"))
3259 /* Matched "protected". */
3266 if (match_string_p ("blic"))
3268 /* Matched "public". */
3276 if (match_string_p ("save"))
3281 if (match_string_p ("target"))
3286 gfc_next_ascii_char ();
3287 ch
= gfc_next_ascii_char ();
3290 if (match_string_p ("lue"))
3292 /* Matched "value". */
3298 if (match_string_p ("latile"))
3300 /* Matched "volatile". */
3308 /* No double colon and no recognizable decl_type, so assume that
3309 we've been looking at something else the whole time. */
3316 /* Check to make sure any parens are paired up correctly. */
3317 if (gfc_match_parens () == MATCH_ERROR
)
3324 seen_at
[d
] = gfc_current_locus
;
3326 if (d
== DECL_DIMENSION
|| d
== DECL_CODIMENSION
)
3328 gfc_array_spec
*as
= NULL
;
3330 m
= gfc_match_array_spec (&as
, d
== DECL_DIMENSION
,
3331 d
== DECL_CODIMENSION
);
3333 if (current_as
== NULL
)
3335 else if (m
== MATCH_YES
)
3337 merge_array_spec (as
, current_as
, false);
3343 if (d
== DECL_CODIMENSION
)
3344 gfc_error ("Missing codimension specification at %C");
3346 gfc_error ("Missing dimension specification at %C");
3350 if (m
== MATCH_ERROR
)
3355 /* Since we've seen a double colon, we have to be looking at an
3356 attr-spec. This means that we can now issue errors. */
3357 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3362 case DECL_ALLOCATABLE
:
3363 attr
= "ALLOCATABLE";
3365 case DECL_ASYNCHRONOUS
:
3366 attr
= "ASYNCHRONOUS";
3368 case DECL_CODIMENSION
:
3369 attr
= "CODIMENSION";
3371 case DECL_CONTIGUOUS
:
3372 attr
= "CONTIGUOUS";
3374 case DECL_DIMENSION
:
3381 attr
= "INTENT (IN)";
3384 attr
= "INTENT (OUT)";
3387 attr
= "INTENT (IN OUT)";
3389 case DECL_INTRINSIC
:
3395 case DECL_PARAMETER
:
3401 case DECL_PROTECTED
:
3416 case DECL_IS_BIND_C
:
3426 attr
= NULL
; /* This shouldn't happen. */
3429 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3434 /* Now that we've dealt with duplicate attributes, add the attributes
3435 to the current attribute. */
3436 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3441 if (gfc_current_state () == COMP_DERIVED
3442 && d
!= DECL_DIMENSION
&& d
!= DECL_CODIMENSION
3443 && d
!= DECL_POINTER
&& d
!= DECL_PRIVATE
3444 && d
!= DECL_PUBLIC
&& d
!= DECL_CONTIGUOUS
&& d
!= DECL_NONE
)
3446 if (d
== DECL_ALLOCATABLE
)
3448 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ALLOCATABLE "
3449 "attribute at %C in a TYPE definition")
3458 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3465 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3466 && gfc_current_state () != COMP_MODULE
)
3468 if (d
== DECL_PRIVATE
)
3472 if (gfc_current_state () == COMP_DERIVED
3473 && gfc_state_stack
->previous
3474 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3476 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Attribute %s "
3477 "at %L in a TYPE definition", attr
,
3487 gfc_error ("%s attribute at %L is not allowed outside of the "
3488 "specification part of a module", attr
, &seen_at
[d
]);
3496 case DECL_ALLOCATABLE
:
3497 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3500 case DECL_ASYNCHRONOUS
:
3501 if (gfc_notify_std (GFC_STD_F2003
,
3502 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3506 t
= gfc_add_asynchronous (¤t_attr
, NULL
, &seen_at
[d
]);
3509 case DECL_CODIMENSION
:
3510 t
= gfc_add_codimension (¤t_attr
, NULL
, &seen_at
[d
]);
3513 case DECL_CONTIGUOUS
:
3514 if (gfc_notify_std (GFC_STD_F2008
,
3515 "Fortran 2008: CONTIGUOUS attribute at %C")
3519 t
= gfc_add_contiguous (¤t_attr
, NULL
, &seen_at
[d
]);
3522 case DECL_DIMENSION
:
3523 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3527 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3531 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3535 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3539 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3542 case DECL_INTRINSIC
:
3543 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3547 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3550 case DECL_PARAMETER
:
3551 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3555 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3558 case DECL_PROTECTED
:
3559 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3561 gfc_error ("PROTECTED at %C only allowed in specification "
3562 "part of a module");
3567 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED "
3572 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3576 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3581 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3586 t
= gfc_add_save (¤t_attr
, SAVE_EXPLICIT
, NULL
, &seen_at
[d
]);
3590 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3593 case DECL_IS_BIND_C
:
3594 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3598 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE attribute "
3603 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3607 if (gfc_notify_std (GFC_STD_F2003
,
3608 "Fortran 2003: VOLATILE attribute at %C")
3612 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3616 gfc_internal_error ("match_attr_spec(): Bad attribute");
3626 /* Module variables implicitly have the SAVE attribute. */
3627 if (gfc_current_state () == COMP_MODULE
&& !current_attr
.save
)
3628 current_attr
.save
= SAVE_IMPLICIT
;
3634 gfc_current_locus
= start
;
3635 gfc_free_array_spec (current_as
);
3641 /* Set the binding label, dest_label, either with the binding label
3642 stored in the given gfc_typespec, ts, or if none was provided, it
3643 will be the symbol name in all lower case, as required by the draft
3644 (J3/04-007, section 15.4.1). If a binding label was given and
3645 there is more than one argument (num_idents), it is an error. */
3648 set_binding_label (char *dest_label
, const char *sym_name
, int num_idents
)
3650 if (num_idents
> 1 && has_name_equals
)
3652 gfc_error ("Multiple identifiers provided with "
3653 "single NAME= specifier at %C");
3657 if (curr_binding_label
[0] != '\0')
3659 /* Binding label given; store in temp holder til have sym. */
3660 strcpy (dest_label
, curr_binding_label
);
3664 /* No binding label given, and the NAME= specifier did not exist,
3665 which means there was no NAME="". */
3666 if (sym_name
!= NULL
&& has_name_equals
== 0)
3667 strcpy (dest_label
, sym_name
);
3674 /* Set the status of the given common block as being BIND(C) or not,
3675 depending on the given parameter, is_bind_c. */
3678 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3680 com_block
->is_bind_c
= is_bind_c
;
3685 /* Verify that the given gfc_typespec is for a C interoperable type. */
3688 verify_c_interop (gfc_typespec
*ts
)
3690 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
!= NULL
)
3691 return (ts
->u
.derived
->ts
.is_c_interop
|| ts
->u
.derived
->attr
.is_bind_c
)
3692 ? SUCCESS
: FAILURE
;
3693 else if (ts
->is_c_interop
!= 1)
3700 /* Verify that the variables of a given common block, which has been
3701 defined with the attribute specifier bind(c), to be of a C
3702 interoperable type. Errors will be reported here, if
3706 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3708 gfc_symbol
*curr_sym
= NULL
;
3709 gfc_try retval
= SUCCESS
;
3711 curr_sym
= com_block
->head
;
3713 /* Make sure we have at least one symbol. */
3714 if (curr_sym
== NULL
)
3717 /* Here we know we have a symbol, so we'll execute this loop
3721 /* The second to last param, 1, says this is in a common block. */
3722 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
3723 curr_sym
= curr_sym
->common_next
;
3724 } while (curr_sym
!= NULL
);
3730 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3731 an appropriate error message is reported. */
3734 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
3735 int is_in_common
, gfc_common_head
*com_block
)
3737 bool bind_c_function
= false;
3738 gfc_try retval
= SUCCESS
;
3740 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
3741 bind_c_function
= true;
3743 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
3745 tmp_sym
= tmp_sym
->result
;
3746 /* Make sure it wasn't an implicitly typed result. */
3747 if (tmp_sym
->attr
.implicit_type
)
3749 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3750 "%L may not be C interoperable", tmp_sym
->name
,
3751 &tmp_sym
->declared_at
);
3752 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
3753 /* Mark it as C interoperable to prevent duplicate warnings. */
3754 tmp_sym
->ts
.is_c_interop
= 1;
3755 tmp_sym
->attr
.is_c_interop
= 1;
3759 /* Here, we know we have the bind(c) attribute, so if we have
3760 enough type info, then verify that it's a C interop kind.
3761 The info could be in the symbol already, or possibly still in
3762 the given ts (current_ts), so look in both. */
3763 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
3765 if (verify_c_interop (&(tmp_sym
->ts
)) != SUCCESS
)
3767 /* See if we're dealing with a sym in a common block or not. */
3768 if (is_in_common
== 1)
3770 gfc_warning ("Variable '%s' in common block '%s' at %L "
3771 "may not be a C interoperable "
3772 "kind though common block '%s' is BIND(C)",
3773 tmp_sym
->name
, com_block
->name
,
3774 &(tmp_sym
->declared_at
), com_block
->name
);
3778 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
3779 gfc_error ("Type declaration '%s' at %L is not C "
3780 "interoperable but it is BIND(C)",
3781 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3783 gfc_warning ("Variable '%s' at %L "
3784 "may not be a C interoperable "
3785 "kind but it is bind(c)",
3786 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3790 /* Variables declared w/in a common block can't be bind(c)
3791 since there's no way for C to see these variables, so there's
3792 semantically no reason for the attribute. */
3793 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
3795 gfc_error ("Variable '%s' in common block '%s' at "
3796 "%L cannot be declared with BIND(C) "
3797 "since it is not a global",
3798 tmp_sym
->name
, com_block
->name
,
3799 &(tmp_sym
->declared_at
));
3803 /* Scalar variables that are bind(c) can not have the pointer
3804 or allocatable attributes. */
3805 if (tmp_sym
->attr
.is_bind_c
== 1)
3807 if (tmp_sym
->attr
.pointer
== 1)
3809 gfc_error ("Variable '%s' at %L cannot have both the "
3810 "POINTER and BIND(C) attributes",
3811 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3815 if (tmp_sym
->attr
.allocatable
== 1)
3817 gfc_error ("Variable '%s' at %L cannot have both the "
3818 "ALLOCATABLE and BIND(C) attributes",
3819 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3825 /* If it is a BIND(C) function, make sure the return value is a
3826 scalar value. The previous tests in this function made sure
3827 the type is interoperable. */
3828 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
3829 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3830 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
3832 /* BIND(C) functions can not return a character string. */
3833 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
3834 if (tmp_sym
->ts
.u
.cl
== NULL
|| tmp_sym
->ts
.u
.cl
->length
== NULL
3835 || tmp_sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
3836 || mpz_cmp_si (tmp_sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
3837 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3838 "be a character string", tmp_sym
->name
,
3839 &(tmp_sym
->declared_at
));
3842 /* See if the symbol has been marked as private. If it has, make sure
3843 there is no binding label and warn the user if there is one. */
3844 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
3845 && tmp_sym
->binding_label
[0] != '\0')
3846 /* Use gfc_warning_now because we won't say that the symbol fails
3847 just because of this. */
3848 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3849 "given the binding label '%s'", tmp_sym
->name
,
3850 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
3856 /* Set the appropriate fields for a symbol that's been declared as
3857 BIND(C) (the is_bind_c flag and the binding label), and verify that
3858 the type is C interoperable. Errors are reported by the functions
3859 used to set/test these fields. */
3862 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
3864 gfc_try retval
= SUCCESS
;
3866 /* TODO: Do we need to make sure the vars aren't marked private? */
3868 /* Set the is_bind_c bit in symbol_attribute. */
3869 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
3871 if (set_binding_label (tmp_sym
->binding_label
, tmp_sym
->name
,
3872 num_idents
) != SUCCESS
)
3879 /* Set the fields marking the given common block as BIND(C), including
3880 a binding label, and report any errors encountered. */
3883 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
3885 gfc_try retval
= SUCCESS
;
3887 /* destLabel, common name, typespec (which may have binding label). */
3888 if (set_binding_label (com_block
->binding_label
, com_block
->name
, num_idents
)
3892 /* Set the given common block (com_block) to being bind(c) (1). */
3893 set_com_block_bind_c (com_block
, 1);
3899 /* Retrieve the list of one or more identifiers that the given bind(c)
3900 attribute applies to. */
3903 get_bind_c_idents (void)
3905 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3907 gfc_symbol
*tmp_sym
= NULL
;
3909 gfc_common_head
*com_block
= NULL
;
3911 if (gfc_match_name (name
) == MATCH_YES
)
3913 found_id
= MATCH_YES
;
3914 gfc_get_ha_symbol (name
, &tmp_sym
);
3916 else if (match_common_name (name
) == MATCH_YES
)
3918 found_id
= MATCH_YES
;
3919 com_block
= gfc_get_common (name
, 0);
3923 gfc_error ("Need either entity or common block name for "
3924 "attribute specification statement at %C");
3928 /* Save the current identifier and look for more. */
3931 /* Increment the number of identifiers found for this spec stmt. */
3934 /* Make sure we have a sym or com block, and verify that it can
3935 be bind(c). Set the appropriate field(s) and look for more
3937 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
3939 if (tmp_sym
!= NULL
)
3941 if (set_verify_bind_c_sym (tmp_sym
, num_idents
)
3947 if (set_verify_bind_c_com_block(com_block
, num_idents
)
3952 /* Look to see if we have another identifier. */
3954 if (gfc_match_eos () == MATCH_YES
)
3955 found_id
= MATCH_NO
;
3956 else if (gfc_match_char (',') != MATCH_YES
)
3957 found_id
= MATCH_NO
;
3958 else if (gfc_match_name (name
) == MATCH_YES
)
3960 found_id
= MATCH_YES
;
3961 gfc_get_ha_symbol (name
, &tmp_sym
);
3963 else if (match_common_name (name
) == MATCH_YES
)
3965 found_id
= MATCH_YES
;
3966 com_block
= gfc_get_common (name
, 0);
3970 gfc_error ("Missing entity or common block name for "
3971 "attribute specification statement at %C");
3977 gfc_internal_error ("Missing symbol");
3979 } while (found_id
== MATCH_YES
);
3981 /* if we get here we were successful */
3986 /* Try and match a BIND(C) attribute specification statement. */
3989 gfc_match_bind_c_stmt (void)
3991 match found_match
= MATCH_NO
;
3996 /* This may not be necessary. */
3998 /* Clear the temporary binding label holder. */
3999 curr_binding_label
[0] = '\0';
4001 /* Look for the bind(c). */
4002 found_match
= gfc_match_bind_c (NULL
, true);
4004 if (found_match
== MATCH_YES
)
4006 /* Look for the :: now, but it is not required. */
4009 /* Get the identifier(s) that needs to be updated. This may need to
4010 change to hand the flag(s) for the attr specified so all identifiers
4011 found can have all appropriate parts updated (assuming that the same
4012 spec stmt can have multiple attrs, such as both bind(c) and
4014 if (get_bind_c_idents () != SUCCESS
)
4015 /* Error message should have printed already. */
4023 /* Match a data declaration statement. */
4026 gfc_match_data_decl (void)
4032 num_idents_on_line
= 0;
4034 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4038 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4039 && gfc_current_state () != COMP_DERIVED
)
4041 sym
= gfc_use_derived (current_ts
.u
.derived
);
4049 current_ts
.u
.derived
= sym
;
4052 m
= match_attr_spec ();
4053 if (m
== MATCH_ERROR
)
4059 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4060 && current_ts
.u
.derived
->components
== NULL
4061 && !current_ts
.u
.derived
->attr
.zero_comp
)
4064 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
4067 gfc_find_symbol (current_ts
.u
.derived
->name
,
4068 current_ts
.u
.derived
->ns
->parent
, 1, &sym
);
4070 /* Any symbol that we find had better be a type definition
4071 which has its components defined. */
4072 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
4073 && (current_ts
.u
.derived
->components
!= NULL
4074 || current_ts
.u
.derived
->attr
.zero_comp
))
4077 /* Now we have an error, which we signal, and then fix up
4078 because the knock-on is plain and simple confusing. */
4079 gfc_error_now ("Derived type at %C has not been previously defined "
4080 "and so cannot appear in a derived type definition");
4081 current_attr
.pointer
= 1;
4086 /* If we have an old-style character declaration, and no new-style
4087 attribute specifications, then there a comma is optional between
4088 the type specification and the variable list. */
4089 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
4090 gfc_match_char (',');
4092 /* Give the types/attributes to symbols that follow. Give the element
4093 a number so that repeat character length expressions can be copied. */
4097 num_idents_on_line
++;
4098 m
= variable_decl (elem
++);
4099 if (m
== MATCH_ERROR
)
4104 if (gfc_match_eos () == MATCH_YES
)
4106 if (gfc_match_char (',') != MATCH_YES
)
4110 if (gfc_error_flag_test () == 0)
4111 gfc_error ("Syntax error in data declaration at %C");
4114 gfc_free_data_all (gfc_current_ns
);
4117 gfc_free_array_spec (current_as
);
4123 /* Match a prefix associated with a function or subroutine
4124 declaration. If the typespec pointer is nonnull, then a typespec
4125 can be matched. Note that if nothing matches, MATCH_YES is
4126 returned (the null string was matched). */
4129 gfc_match_prefix (gfc_typespec
*ts
)
4135 gfc_clear_attr (¤t_attr
);
4137 seen_impure
= false;
4139 gcc_assert (!gfc_matching_prefix
);
4140 gfc_matching_prefix
= true;
4144 found_prefix
= false;
4146 if (!seen_type
&& ts
!= NULL
4147 && gfc_match_decl_type_spec (ts
, 0) == MATCH_YES
4148 && gfc_match_space () == MATCH_YES
)
4152 found_prefix
= true;
4155 if (gfc_match ("elemental% ") == MATCH_YES
)
4157 if (gfc_add_elemental (¤t_attr
, NULL
) == FAILURE
)
4160 found_prefix
= true;
4163 if (gfc_match ("pure% ") == MATCH_YES
)
4165 if (gfc_add_pure (¤t_attr
, NULL
) == FAILURE
)
4168 found_prefix
= true;
4171 if (gfc_match ("recursive% ") == MATCH_YES
)
4173 if (gfc_add_recursive (¤t_attr
, NULL
) == FAILURE
)
4176 found_prefix
= true;
4179 /* IMPURE is a somewhat special case, as it needs not set an actual
4180 attribute but rather only prevents ELEMENTAL routines from being
4181 automatically PURE. */
4182 if (gfc_match ("impure% ") == MATCH_YES
)
4184 if (gfc_notify_std (GFC_STD_F2008
,
4185 "Fortran 2008: IMPURE procedure at %C")
4190 found_prefix
= true;
4193 while (found_prefix
);
4195 /* IMPURE and PURE must not both appear, of course. */
4196 if (seen_impure
&& current_attr
.pure
)
4198 gfc_error ("PURE and IMPURE must not appear both at %C");
4202 /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */
4203 if (!seen_impure
&& current_attr
.elemental
&& !current_attr
.pure
)
4205 if (gfc_add_pure (¤t_attr
, NULL
) == FAILURE
)
4209 /* At this point, the next item is not a prefix. */
4210 gcc_assert (gfc_matching_prefix
);
4211 gfc_matching_prefix
= false;
4215 gcc_assert (gfc_matching_prefix
);
4216 gfc_matching_prefix
= false;
4221 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
4224 copy_prefix (symbol_attribute
*dest
, locus
*where
)
4226 if (current_attr
.pure
&& gfc_add_pure (dest
, where
) == FAILURE
)
4229 if (current_attr
.elemental
&& gfc_add_elemental (dest
, where
) == FAILURE
)
4232 if (current_attr
.recursive
&& gfc_add_recursive (dest
, where
) == FAILURE
)
4239 /* Match a formal argument list. */
4242 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
4244 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
4245 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4251 if (gfc_match_char ('(') != MATCH_YES
)
4258 if (gfc_match_char (')') == MATCH_YES
)
4263 if (gfc_match_char ('*') == MATCH_YES
)
4267 m
= gfc_match_name (name
);
4271 if (gfc_get_symbol (name
, NULL
, &sym
))
4275 p
= gfc_get_formal_arglist ();
4287 /* We don't add the VARIABLE flavor because the name could be a
4288 dummy procedure. We don't apply these attributes to formal
4289 arguments of statement functions. */
4290 if (sym
!= NULL
&& !st_flag
4291 && (gfc_add_dummy (&sym
->attr
, sym
->name
, NULL
) == FAILURE
4292 || gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
))
4298 /* The name of a program unit can be in a different namespace,
4299 so check for it explicitly. After the statement is accepted,
4300 the name is checked for especially in gfc_get_symbol(). */
4301 if (gfc_new_block
!= NULL
&& sym
!= NULL
4302 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
4304 gfc_error ("Name '%s' at %C is the name of the procedure",
4310 if (gfc_match_char (')') == MATCH_YES
)
4313 m
= gfc_match_char (',');
4316 gfc_error ("Unexpected junk in formal argument list at %C");
4322 /* Check for duplicate symbols in the formal argument list. */
4325 for (p
= head
; p
->next
; p
= p
->next
)
4330 for (q
= p
->next
; q
; q
= q
->next
)
4331 if (p
->sym
== q
->sym
)
4333 gfc_error ("Duplicate symbol '%s' in formal argument list "
4334 "at %C", p
->sym
->name
);
4342 if (gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
)
4352 gfc_free_formal_arglist (head
);
4357 /* Match a RESULT specification following a function declaration or
4358 ENTRY statement. Also matches the end-of-statement. */
4361 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
4363 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4367 if (gfc_match (" result (") != MATCH_YES
)
4370 m
= gfc_match_name (name
);
4374 /* Get the right paren, and that's it because there could be the
4375 bind(c) attribute after the result clause. */
4376 if (gfc_match_char(')') != MATCH_YES
)
4378 /* TODO: should report the missing right paren here. */
4382 if (strcmp (function
->name
, name
) == 0)
4384 gfc_error ("RESULT variable at %C must be different than function name");
4388 if (gfc_get_symbol (name
, NULL
, &r
))
4391 if (gfc_add_result (&r
->attr
, r
->name
, NULL
) == FAILURE
)
4400 /* Match a function suffix, which could be a combination of a result
4401 clause and BIND(C), either one, or neither. The draft does not
4402 require them to come in a specific order. */
4405 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4407 match is_bind_c
; /* Found bind(c). */
4408 match is_result
; /* Found result clause. */
4409 match found_match
; /* Status of whether we've found a good match. */
4410 char peek_char
; /* Character we're going to peek at. */
4411 bool allow_binding_name
;
4413 /* Initialize to having found nothing. */
4414 found_match
= MATCH_NO
;
4415 is_bind_c
= MATCH_NO
;
4416 is_result
= MATCH_NO
;
4418 /* Get the next char to narrow between result and bind(c). */
4419 gfc_gobble_whitespace ();
4420 peek_char
= gfc_peek_ascii_char ();
4422 /* C binding names are not allowed for internal procedures. */
4423 if (gfc_current_state () == COMP_CONTAINS
4424 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4425 allow_binding_name
= false;
4427 allow_binding_name
= true;
4432 /* Look for result clause. */
4433 is_result
= match_result (sym
, result
);
4434 if (is_result
== MATCH_YES
)
4436 /* Now see if there is a bind(c) after it. */
4437 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4438 /* We've found the result clause and possibly bind(c). */
4439 found_match
= MATCH_YES
;
4442 /* This should only be MATCH_ERROR. */
4443 found_match
= is_result
;
4446 /* Look for bind(c) first. */
4447 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4448 if (is_bind_c
== MATCH_YES
)
4450 /* Now see if a result clause followed it. */
4451 is_result
= match_result (sym
, result
);
4452 found_match
= MATCH_YES
;
4456 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4457 found_match
= MATCH_ERROR
;
4461 gfc_error ("Unexpected junk after function declaration at %C");
4462 found_match
= MATCH_ERROR
;
4466 if (is_bind_c
== MATCH_YES
)
4468 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4469 if (gfc_current_state () == COMP_CONTAINS
4470 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4471 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
4472 "at %L may not be specified for an internal "
4473 "procedure", &gfc_current_locus
)
4477 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1)
4486 /* Procedure pointer return value without RESULT statement:
4487 Add "hidden" result variable named "ppr@". */
4490 add_hidden_procptr_result (gfc_symbol
*sym
)
4494 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4497 /* First usage case: PROCEDURE and EXTERNAL statements. */
4498 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4499 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4500 && sym
->attr
.external
;
4501 /* Second usage case: INTERFACE statements. */
4502 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4503 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4504 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4510 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4514 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4515 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4516 st2
->n
.sym
= stree
->n
.sym
;
4518 sym
->result
= stree
->n
.sym
;
4520 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4521 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4522 sym
->result
->attr
.external
= sym
->attr
.external
;
4523 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4524 sym
->result
->ts
= sym
->ts
;
4525 sym
->attr
.proc_pointer
= 0;
4526 sym
->attr
.pointer
= 0;
4527 sym
->attr
.external
= 0;
4528 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4530 sym
->result
->attr
.pointer
= 0;
4531 sym
->result
->attr
.proc_pointer
= 1;
4534 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4536 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4537 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4538 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4539 && sym
== gfc_current_ns
->proc_name
4540 && sym
== sym
->result
->ns
->proc_name
4541 && strcmp ("ppr@", sym
->result
->name
) == 0)
4543 sym
->result
->attr
.proc_pointer
= 1;
4544 sym
->attr
.pointer
= 0;
4552 /* Match the interface for a PROCEDURE declaration,
4553 including brackets (R1212). */
4556 match_procedure_interface (gfc_symbol
**proc_if
)
4560 locus old_loc
, entry_loc
;
4561 gfc_namespace
*old_ns
= gfc_current_ns
;
4562 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4564 old_loc
= entry_loc
= gfc_current_locus
;
4565 gfc_clear_ts (¤t_ts
);
4567 if (gfc_match (" (") != MATCH_YES
)
4569 gfc_current_locus
= entry_loc
;
4573 /* Get the type spec. for the procedure interface. */
4574 old_loc
= gfc_current_locus
;
4575 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4576 gfc_gobble_whitespace ();
4577 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4580 if (m
== MATCH_ERROR
)
4583 /* Procedure interface is itself a procedure. */
4584 gfc_current_locus
= old_loc
;
4585 m
= gfc_match_name (name
);
4587 /* First look to see if it is already accessible in the current
4588 namespace because it is use associated or contained. */
4590 if (gfc_find_sym_tree (name
, NULL
, 0, &st
))
4593 /* If it is still not found, then try the parent namespace, if it
4594 exists and create the symbol there if it is still not found. */
4595 if (gfc_current_ns
->parent
)
4596 gfc_current_ns
= gfc_current_ns
->parent
;
4597 if (st
== NULL
&& gfc_get_ha_sym_tree (name
, &st
))
4600 gfc_current_ns
= old_ns
;
4601 *proc_if
= st
->n
.sym
;
4603 /* Various interface checks. */
4607 /* Resolve interface if possible. That way, attr.procedure is only set
4608 if it is declared by a later procedure-declaration-stmt, which is
4609 invalid per C1212. */
4610 while ((*proc_if
)->ts
.interface
)
4611 *proc_if
= (*proc_if
)->ts
.interface
;
4613 if ((*proc_if
)->generic
)
4615 gfc_error ("Interface '%s' at %C may not be generic",
4619 if ((*proc_if
)->attr
.proc
== PROC_ST_FUNCTION
)
4621 gfc_error ("Interface '%s' at %C may not be a statement function",
4625 /* Handle intrinsic procedures. */
4626 if (!((*proc_if
)->attr
.external
|| (*proc_if
)->attr
.use_assoc
4627 || (*proc_if
)->attr
.if_source
== IFSRC_IFBODY
)
4628 && (gfc_is_intrinsic ((*proc_if
), 0, gfc_current_locus
)
4629 || gfc_is_intrinsic ((*proc_if
), 1, gfc_current_locus
)))
4630 (*proc_if
)->attr
.intrinsic
= 1;
4631 if ((*proc_if
)->attr
.intrinsic
4632 && !gfc_intrinsic_actual_ok ((*proc_if
)->name
, 0))
4634 gfc_error ("Intrinsic procedure '%s' not allowed "
4635 "in PROCEDURE statement at %C", (*proc_if
)->name
);
4641 if (gfc_match (" )") != MATCH_YES
)
4643 gfc_current_locus
= entry_loc
;
4651 /* Match a PROCEDURE declaration (R1211). */
4654 match_procedure_decl (void)
4657 gfc_symbol
*sym
, *proc_if
= NULL
;
4659 gfc_expr
*initializer
= NULL
;
4661 /* Parse interface (with brackets). */
4662 m
= match_procedure_interface (&proc_if
);
4666 /* Parse attributes (with colons). */
4667 m
= match_attr_spec();
4668 if (m
== MATCH_ERROR
)
4671 /* Get procedure symbols. */
4674 m
= gfc_match_symbol (&sym
, 0);
4677 else if (m
== MATCH_ERROR
)
4680 /* Add current_attr to the symbol attributes. */
4681 if (gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4684 if (sym
->attr
.is_bind_c
)
4686 /* Check for C1218. */
4687 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4689 gfc_error ("BIND(C) attribute at %C requires "
4690 "an interface with BIND(C)");
4693 /* Check for C1217. */
4694 if (has_name_equals
&& sym
->attr
.pointer
)
4696 gfc_error ("BIND(C) procedure with NAME may not have "
4697 "POINTER attribute at %C");
4700 if (has_name_equals
&& sym
->attr
.dummy
)
4702 gfc_error ("Dummy procedure at %C may not have "
4703 "BIND(C) attribute with NAME");
4706 /* Set binding label for BIND(C). */
4707 if (set_binding_label (sym
->binding_label
, sym
->name
, num
) != SUCCESS
)
4711 if (gfc_add_external (&sym
->attr
, NULL
) == FAILURE
)
4714 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4717 if (gfc_add_proc (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4720 /* Set interface. */
4721 if (proc_if
!= NULL
)
4723 if (sym
->ts
.type
!= BT_UNKNOWN
)
4725 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4726 sym
->name
, &gfc_current_locus
,
4727 gfc_basic_typename (sym
->ts
.type
));
4730 sym
->ts
.interface
= proc_if
;
4731 sym
->attr
.untyped
= 1;
4732 sym
->attr
.if_source
= IFSRC_IFBODY
;
4734 else if (current_ts
.type
!= BT_UNKNOWN
)
4736 if (gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4738 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4739 sym
->ts
.interface
->ts
= current_ts
;
4740 sym
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
4741 sym
->ts
.interface
->attr
.function
= 1;
4742 sym
->attr
.function
= 1;
4743 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
4746 if (gfc_match (" =>") == MATCH_YES
)
4748 if (!current_attr
.pointer
)
4750 gfc_error ("Initialization at %C isn't for a pointer variable");
4755 m
= match_pointer_init (&initializer
, 1);
4759 if (add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
)
4765 gfc_set_sym_referenced (sym
);
4767 if (gfc_match_eos () == MATCH_YES
)
4769 if (gfc_match_char (',') != MATCH_YES
)
4774 gfc_error ("Syntax error in PROCEDURE statement at %C");
4778 /* Free stuff up and return. */
4779 gfc_free_expr (initializer
);
4785 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
4788 /* Match a procedure pointer component declaration (R445). */
4791 match_ppc_decl (void)
4794 gfc_symbol
*proc_if
= NULL
;
4798 gfc_expr
*initializer
= NULL
;
4799 gfc_typebound_proc
* tb
;
4800 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4802 /* Parse interface (with brackets). */
4803 m
= match_procedure_interface (&proc_if
);
4807 /* Parse attributes. */
4808 tb
= XCNEW (gfc_typebound_proc
);
4809 tb
->where
= gfc_current_locus
;
4810 m
= match_binding_attributes (tb
, false, true);
4811 if (m
== MATCH_ERROR
)
4814 gfc_clear_attr (¤t_attr
);
4815 current_attr
.procedure
= 1;
4816 current_attr
.proc_pointer
= 1;
4817 current_attr
.access
= tb
->access
;
4818 current_attr
.flavor
= FL_PROCEDURE
;
4820 /* Match the colons (required). */
4821 if (gfc_match (" ::") != MATCH_YES
)
4823 gfc_error ("Expected '::' after binding-attributes at %C");
4827 /* Check for C450. */
4828 if (!tb
->nopass
&& proc_if
== NULL
)
4830 gfc_error("NOPASS or explicit interface required at %C");
4834 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Procedure pointer "
4835 "component at %C") == FAILURE
)
4838 /* Match PPC names. */
4842 m
= gfc_match_name (name
);
4845 else if (m
== MATCH_ERROR
)
4848 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
4851 /* Add current_attr to the symbol attributes. */
4852 if (gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4855 if (gfc_add_external (&c
->attr
, NULL
) == FAILURE
)
4858 if (gfc_add_proc (&c
->attr
, name
, NULL
) == FAILURE
)
4863 /* Set interface. */
4864 if (proc_if
!= NULL
)
4866 c
->ts
.interface
= proc_if
;
4867 c
->attr
.untyped
= 1;
4868 c
->attr
.if_source
= IFSRC_IFBODY
;
4870 else if (ts
.type
!= BT_UNKNOWN
)
4873 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4874 c
->ts
.interface
->ts
= ts
;
4875 c
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
4876 c
->ts
.interface
->attr
.function
= 1;
4877 c
->attr
.function
= 1;
4878 c
->attr
.if_source
= IFSRC_UNKNOWN
;
4881 if (gfc_match (" =>") == MATCH_YES
)
4883 m
= match_pointer_init (&initializer
, 1);
4886 gfc_free_expr (initializer
);
4889 c
->initializer
= initializer
;
4892 if (gfc_match_eos () == MATCH_YES
)
4894 if (gfc_match_char (',') != MATCH_YES
)
4899 gfc_error ("Syntax error in procedure pointer component at %C");
4904 /* Match a PROCEDURE declaration inside an interface (R1206). */
4907 match_procedure_in_interface (void)
4911 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4913 if (current_interface
.type
== INTERFACE_NAMELESS
4914 || current_interface
.type
== INTERFACE_ABSTRACT
)
4916 gfc_error ("PROCEDURE at %C must be in a generic interface");
4922 m
= gfc_match_name (name
);
4925 else if (m
== MATCH_ERROR
)
4927 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
4930 if (gfc_add_interface (sym
) == FAILURE
)
4933 if (gfc_match_eos () == MATCH_YES
)
4935 if (gfc_match_char (',') != MATCH_YES
)
4942 gfc_error ("Syntax error in PROCEDURE statement at %C");
4947 /* General matcher for PROCEDURE declarations. */
4949 static match
match_procedure_in_type (void);
4952 gfc_match_procedure (void)
4956 switch (gfc_current_state ())
4961 case COMP_SUBROUTINE
:
4963 m
= match_procedure_decl ();
4965 case COMP_INTERFACE
:
4966 m
= match_procedure_in_interface ();
4969 m
= match_ppc_decl ();
4971 case COMP_DERIVED_CONTAINS
:
4972 m
= match_procedure_in_type ();
4981 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROCEDURE statement at %C")
4989 /* Warn if a matched procedure has the same name as an intrinsic; this is
4990 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4991 parser-state-stack to find out whether we're in a module. */
4994 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
4998 in_module
= (gfc_state_stack
->previous
4999 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
5001 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
5005 /* Match a function declaration. */
5008 gfc_match_function_decl (void)
5010 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5011 gfc_symbol
*sym
, *result
;
5015 match found_match
; /* Status returned by match func. */
5017 if (gfc_current_state () != COMP_NONE
5018 && gfc_current_state () != COMP_INTERFACE
5019 && gfc_current_state () != COMP_CONTAINS
)
5022 gfc_clear_ts (¤t_ts
);
5024 old_loc
= gfc_current_locus
;
5026 m
= gfc_match_prefix (¤t_ts
);
5029 gfc_current_locus
= old_loc
;
5033 if (gfc_match ("function% %n", name
) != MATCH_YES
)
5035 gfc_current_locus
= old_loc
;
5038 if (get_proc_name (name
, &sym
, false))
5041 if (add_hidden_procptr_result (sym
) == SUCCESS
)
5044 gfc_new_block
= sym
;
5046 m
= gfc_match_formal_arglist (sym
, 0, 0);
5049 gfc_error ("Expected formal argument list in function "
5050 "definition at %C");
5054 else if (m
== MATCH_ERROR
)
5059 /* According to the draft, the bind(c) and result clause can
5060 come in either order after the formal_arg_list (i.e., either
5061 can be first, both can exist together or by themselves or neither
5062 one). Therefore, the match_result can't match the end of the
5063 string, and check for the bind(c) or result clause in either order. */
5064 found_match
= gfc_match_eos ();
5066 /* Make sure that it isn't already declared as BIND(C). If it is, it
5067 must have been marked BIND(C) with a BIND(C) attribute and that is
5068 not allowed for procedures. */
5069 if (sym
->attr
.is_bind_c
== 1)
5071 sym
->attr
.is_bind_c
= 0;
5072 if (sym
->old_symbol
!= NULL
)
5073 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5074 "variables or common blocks",
5075 &(sym
->old_symbol
->declared_at
));
5077 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5078 "variables or common blocks", &gfc_current_locus
);
5081 if (found_match
!= MATCH_YES
)
5083 /* If we haven't found the end-of-statement, look for a suffix. */
5084 suffix_match
= gfc_match_suffix (sym
, &result
);
5085 if (suffix_match
== MATCH_YES
)
5086 /* Need to get the eos now. */
5087 found_match
= gfc_match_eos ();
5089 found_match
= suffix_match
;
5092 if(found_match
!= MATCH_YES
)
5096 /* Make changes to the symbol. */
5099 if (gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
5102 if (gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
5103 || copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
5106 /* Delay matching the function characteristics until after the
5107 specification block by signalling kind=-1. */
5108 sym
->declared_at
= old_loc
;
5109 if (current_ts
.type
!= BT_UNKNOWN
)
5110 current_ts
.kind
= -1;
5112 current_ts
.kind
= 0;
5116 if (current_ts
.type
!= BT_UNKNOWN
5117 && gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
5123 if (current_ts
.type
!= BT_UNKNOWN
5124 && gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
)
5127 sym
->result
= result
;
5130 /* Warn if this procedure has the same name as an intrinsic. */
5131 warn_intrinsic_shadow (sym
, true);
5137 gfc_current_locus
= old_loc
;
5142 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
5143 pass the name of the entry, rather than the gfc_current_block name, and
5144 to return false upon finding an existing global entry. */
5147 add_global_entry (const char *name
, int sub
)
5150 enum gfc_symbol_type type
;
5152 s
= gfc_get_gsymbol(name
);
5153 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
5156 || (s
->type
!= GSYM_UNKNOWN
5157 && s
->type
!= type
))
5158 gfc_global_used(s
, NULL
);
5162 s
->where
= gfc_current_locus
;
5164 s
->ns
= gfc_current_ns
;
5171 /* Match an ENTRY statement. */
5174 gfc_match_entry (void)
5179 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5180 gfc_compile_state state
;
5184 bool module_procedure
;
5188 m
= gfc_match_name (name
);
5192 if (gfc_notify_std (GFC_STD_F2008_OBS
, "Fortran 2008 obsolescent feature: "
5193 "ENTRY statement at %C") == FAILURE
)
5196 state
= gfc_current_state ();
5197 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
5202 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
5205 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
5207 case COMP_BLOCK_DATA
:
5208 gfc_error ("ENTRY statement at %C cannot appear within "
5211 case COMP_INTERFACE
:
5212 gfc_error ("ENTRY statement at %C cannot appear within "
5216 gfc_error ("ENTRY statement at %C cannot appear within "
5217 "a DERIVED TYPE block");
5220 gfc_error ("ENTRY statement at %C cannot appear within "
5221 "an IF-THEN block");
5224 gfc_error ("ENTRY statement at %C cannot appear within "
5228 gfc_error ("ENTRY statement at %C cannot appear within "
5232 gfc_error ("ENTRY statement at %C cannot appear within "
5236 gfc_error ("ENTRY statement at %C cannot appear within "
5240 gfc_error ("ENTRY statement at %C cannot appear within "
5241 "a contained subprogram");
5244 gfc_internal_error ("gfc_match_entry(): Bad state");
5249 module_procedure
= gfc_current_ns
->parent
!= NULL
5250 && gfc_current_ns
->parent
->proc_name
5251 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
5254 if (gfc_current_ns
->parent
!= NULL
5255 && gfc_current_ns
->parent
->proc_name
5256 && !module_procedure
)
5258 gfc_error("ENTRY statement at %C cannot appear in a "
5259 "contained procedure");
5263 /* Module function entries need special care in get_proc_name
5264 because previous references within the function will have
5265 created symbols attached to the current namespace. */
5266 if (get_proc_name (name
, &entry
,
5267 gfc_current_ns
->parent
!= NULL
5268 && module_procedure
))
5271 proc
= gfc_current_block ();
5273 /* Make sure that it isn't already declared as BIND(C). If it is, it
5274 must have been marked BIND(C) with a BIND(C) attribute and that is
5275 not allowed for procedures. */
5276 if (entry
->attr
.is_bind_c
== 1)
5278 entry
->attr
.is_bind_c
= 0;
5279 if (entry
->old_symbol
!= NULL
)
5280 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5281 "variables or common blocks",
5282 &(entry
->old_symbol
->declared_at
));
5284 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5285 "variables or common blocks", &gfc_current_locus
);
5288 /* Check what next non-whitespace character is so we can tell if there
5289 is the required parens if we have a BIND(C). */
5290 gfc_gobble_whitespace ();
5291 peek_char
= gfc_peek_ascii_char ();
5293 if (state
== COMP_SUBROUTINE
)
5295 /* An entry in a subroutine. */
5296 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 1))
5299 m
= gfc_match_formal_arglist (entry
, 0, 1);
5303 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5304 never be an internal procedure. */
5305 is_bind_c
= gfc_match_bind_c (entry
, true);
5306 if (is_bind_c
== MATCH_ERROR
)
5308 if (is_bind_c
== MATCH_YES
)
5310 if (peek_char
!= '(')
5312 gfc_error ("Missing required parentheses before BIND(C) at %C");
5315 if (gfc_add_is_bind_c (&(entry
->attr
), entry
->name
, &(entry
->declared_at
), 1)
5320 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5321 || gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5326 /* An entry in a function.
5327 We need to take special care because writing
5332 ENTRY f() RESULT (r)
5334 ENTRY f RESULT (r). */
5335 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 0))
5338 old_loc
= gfc_current_locus
;
5339 if (gfc_match_eos () == MATCH_YES
)
5341 gfc_current_locus
= old_loc
;
5342 /* Match the empty argument list, and add the interface to
5344 m
= gfc_match_formal_arglist (entry
, 0, 1);
5347 m
= gfc_match_formal_arglist (entry
, 0, 0);
5354 if (gfc_match_eos () == MATCH_YES
)
5356 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5357 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5360 entry
->result
= entry
;
5364 m
= gfc_match_suffix (entry
, &result
);
5366 gfc_syntax_error (ST_ENTRY
);
5372 if (gfc_add_result (&result
->attr
, result
->name
, NULL
) == FAILURE
5373 || gfc_add_entry (&entry
->attr
, result
->name
, NULL
) == FAILURE
5374 || gfc_add_function (&entry
->attr
, result
->name
, NULL
)
5377 entry
->result
= result
;
5381 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5382 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5384 entry
->result
= entry
;
5389 if (gfc_match_eos () != MATCH_YES
)
5391 gfc_syntax_error (ST_ENTRY
);
5395 entry
->attr
.recursive
= proc
->attr
.recursive
;
5396 entry
->attr
.elemental
= proc
->attr
.elemental
;
5397 entry
->attr
.pure
= proc
->attr
.pure
;
5399 el
= gfc_get_entry_list ();
5401 el
->next
= gfc_current_ns
->entries
;
5402 gfc_current_ns
->entries
= el
;
5404 el
->id
= el
->next
->id
+ 1;
5408 new_st
.op
= EXEC_ENTRY
;
5409 new_st
.ext
.entry
= el
;
5415 /* Match a subroutine statement, including optional prefixes. */
5418 gfc_match_subroutine (void)
5420 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5425 bool allow_binding_name
;
5427 if (gfc_current_state () != COMP_NONE
5428 && gfc_current_state () != COMP_INTERFACE
5429 && gfc_current_state () != COMP_CONTAINS
)
5432 m
= gfc_match_prefix (NULL
);
5436 m
= gfc_match ("subroutine% %n", name
);
5440 if (get_proc_name (name
, &sym
, false))
5443 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5444 the symbol existed before. */
5445 sym
->declared_at
= gfc_current_locus
;
5447 if (add_hidden_procptr_result (sym
) == SUCCESS
)
5450 gfc_new_block
= sym
;
5452 /* Check what next non-whitespace character is so we can tell if there
5453 is the required parens if we have a BIND(C). */
5454 gfc_gobble_whitespace ();
5455 peek_char
= gfc_peek_ascii_char ();
5457 if (gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
5460 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5463 /* Make sure that it isn't already declared as BIND(C). If it is, it
5464 must have been marked BIND(C) with a BIND(C) attribute and that is
5465 not allowed for procedures. */
5466 if (sym
->attr
.is_bind_c
== 1)
5468 sym
->attr
.is_bind_c
= 0;
5469 if (sym
->old_symbol
!= NULL
)
5470 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5471 "variables or common blocks",
5472 &(sym
->old_symbol
->declared_at
));
5474 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5475 "variables or common blocks", &gfc_current_locus
);
5478 /* C binding names are not allowed for internal procedures. */
5479 if (gfc_current_state () == COMP_CONTAINS
5480 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5481 allow_binding_name
= false;
5483 allow_binding_name
= true;
5485 /* Here, we are just checking if it has the bind(c) attribute, and if
5486 so, then we need to make sure it's all correct. If it doesn't,
5487 we still need to continue matching the rest of the subroutine line. */
5488 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5489 if (is_bind_c
== MATCH_ERROR
)
5491 /* There was an attempt at the bind(c), but it was wrong. An
5492 error message should have been printed w/in the gfc_match_bind_c
5493 so here we'll just return the MATCH_ERROR. */
5497 if (is_bind_c
== MATCH_YES
)
5499 /* The following is allowed in the Fortran 2008 draft. */
5500 if (gfc_current_state () == COMP_CONTAINS
5501 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5502 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
5503 "at %L may not be specified for an internal "
5504 "procedure", &gfc_current_locus
)
5508 if (peek_char
!= '(')
5510 gfc_error ("Missing required parentheses before BIND(C) at %C");
5513 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &(sym
->declared_at
), 1)
5518 if (gfc_match_eos () != MATCH_YES
)
5520 gfc_syntax_error (ST_SUBROUTINE
);
5524 if (copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
5527 /* Warn if it has the same name as an intrinsic. */
5528 warn_intrinsic_shadow (sym
, false);
5534 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5535 given, and set the binding label in either the given symbol (if not
5536 NULL), or in the current_ts. The symbol may be NULL because we may
5537 encounter the BIND(C) before the declaration itself. Return
5538 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5539 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5540 or MATCH_YES if the specifier was correct and the binding label and
5541 bind(c) fields were set correctly for the given symbol or the
5542 current_ts. If allow_binding_name is false, no binding name may be
5546 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5548 /* binding label, if exists */
5549 char binding_label
[GFC_MAX_SYMBOL_LEN
+ 1];
5553 /* Initialize the flag that specifies whether we encountered a NAME=
5554 specifier or not. */
5555 has_name_equals
= 0;
5557 /* Init the first char to nil so we can catch if we don't have
5558 the label (name attr) or the symbol name yet. */
5559 binding_label
[0] = '\0';
5561 /* This much we have to be able to match, in this order, if
5562 there is a bind(c) label. */
5563 if (gfc_match (" bind ( c ") != MATCH_YES
)
5566 /* Now see if there is a binding label, or if we've reached the
5567 end of the bind(c) attribute without one. */
5568 if (gfc_match_char (',') == MATCH_YES
)
5570 if (gfc_match (" name = ") != MATCH_YES
)
5572 gfc_error ("Syntax error in NAME= specifier for binding label "
5574 /* should give an error message here */
5578 has_name_equals
= 1;
5580 /* Get the opening quote. */
5581 double_quote
= MATCH_YES
;
5582 single_quote
= MATCH_YES
;
5583 double_quote
= gfc_match_char ('"');
5584 if (double_quote
!= MATCH_YES
)
5585 single_quote
= gfc_match_char ('\'');
5586 if (double_quote
!= MATCH_YES
&& single_quote
!= MATCH_YES
)
5588 gfc_error ("Syntax error in NAME= specifier for binding label "
5593 /* Grab the binding label, using functions that will not lower
5594 case the names automatically. */
5595 if (gfc_match_name_C (binding_label
) != MATCH_YES
)
5598 /* Get the closing quotation. */
5599 if (double_quote
== MATCH_YES
)
5601 if (gfc_match_char ('"') != MATCH_YES
)
5603 gfc_error ("Missing closing quote '\"' for binding label at %C");
5604 /* User started string with '"' so looked to match it. */
5610 if (gfc_match_char ('\'') != MATCH_YES
)
5612 gfc_error ("Missing closing quote '\'' for binding label at %C");
5613 /* User started string with "'" char. */
5619 /* Get the required right paren. */
5620 if (gfc_match_char (')') != MATCH_YES
)
5622 gfc_error ("Missing closing paren for binding label at %C");
5626 if (has_name_equals
&& !allow_binding_name
)
5628 gfc_error ("No binding name is allowed in BIND(C) at %C");
5632 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5634 gfc_error ("For dummy procedure %s, no binding name is "
5635 "allowed in BIND(C) at %C", sym
->name
);
5640 /* Save the binding label to the symbol. If sym is null, we're
5641 probably matching the typespec attributes of a declaration and
5642 haven't gotten the name yet, and therefore, no symbol yet. */
5643 if (binding_label
[0] != '\0')
5647 strcpy (sym
->binding_label
, binding_label
);
5650 strcpy (curr_binding_label
, binding_label
);
5652 else if (allow_binding_name
)
5654 /* No binding label, but if symbol isn't null, we
5655 can set the label for it here.
5656 If name="" or allow_binding_name is false, no C binding name is
5658 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
5659 strncpy (sym
->binding_label
, sym
->name
, strlen (sym
->name
) + 1);
5662 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
5663 && current_interface
.type
== INTERFACE_ABSTRACT
)
5665 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5673 /* Return nonzero if we're currently compiling a contained procedure. */
5676 contained_procedure (void)
5678 gfc_state_data
*s
= gfc_state_stack
;
5680 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
5681 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
5687 /* Set the kind of each enumerator. The kind is selected such that it is
5688 interoperable with the corresponding C enumeration type, making
5689 sure that -fshort-enums is honored. */
5694 enumerator_history
*current_history
= NULL
;
5698 if (max_enum
== NULL
|| enum_history
== NULL
)
5701 if (!flag_short_enums
)
5707 kind
= gfc_integer_kinds
[i
++].kind
;
5709 while (kind
< gfc_c_int_kind
5710 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
5713 current_history
= enum_history
;
5714 while (current_history
!= NULL
)
5716 current_history
->sym
->ts
.kind
= kind
;
5717 current_history
= current_history
->next
;
5722 /* Match any of the various end-block statements. Returns the type of
5723 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5724 and END BLOCK statements cannot be replaced by a single END statement. */
5727 gfc_match_end (gfc_statement
*st
)
5729 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5730 gfc_compile_state state
;
5732 const char *block_name
;
5737 old_loc
= gfc_current_locus
;
5738 if (gfc_match ("end") != MATCH_YES
)
5741 state
= gfc_current_state ();
5742 block_name
= gfc_current_block () == NULL
5743 ? NULL
: gfc_current_block ()->name
;
5747 case COMP_ASSOCIATE
:
5749 if (!strcmp (block_name
, "block@"))
5754 case COMP_DERIVED_CONTAINS
:
5755 state
= gfc_state_stack
->previous
->state
;
5756 block_name
= gfc_state_stack
->previous
->sym
== NULL
5757 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
5768 *st
= ST_END_PROGRAM
;
5769 target
= " program";
5773 case COMP_SUBROUTINE
:
5774 *st
= ST_END_SUBROUTINE
;
5775 target
= " subroutine";
5776 eos_ok
= !contained_procedure ();
5780 *st
= ST_END_FUNCTION
;
5781 target
= " function";
5782 eos_ok
= !contained_procedure ();
5785 case COMP_BLOCK_DATA
:
5786 *st
= ST_END_BLOCK_DATA
;
5787 target
= " block data";
5792 *st
= ST_END_MODULE
;
5797 case COMP_INTERFACE
:
5798 *st
= ST_END_INTERFACE
;
5799 target
= " interface";
5804 case COMP_DERIVED_CONTAINS
:
5810 case COMP_ASSOCIATE
:
5811 *st
= ST_END_ASSOCIATE
;
5812 target
= " associate";
5835 *st
= ST_END_CRITICAL
;
5836 target
= " critical";
5841 case COMP_SELECT_TYPE
:
5842 *st
= ST_END_SELECT
;
5848 *st
= ST_END_FORALL
;
5863 last_initializer
= NULL
;
5865 gfc_free_enum_history ();
5869 gfc_error ("Unexpected END statement at %C");
5873 if (gfc_match_eos () == MATCH_YES
)
5875 if (!eos_ok
&& (*st
== ST_END_SUBROUTINE
|| *st
== ST_END_FUNCTION
))
5877 if (gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: END statement "
5878 "instead of %s statement at %L",
5879 gfc_ascii_statement (*st
), &old_loc
) == FAILURE
)
5884 /* We would have required END [something]. */
5885 gfc_error ("%s statement expected at %L",
5886 gfc_ascii_statement (*st
), &old_loc
);
5893 /* Verify that we've got the sort of end-block that we're expecting. */
5894 if (gfc_match (target
) != MATCH_YES
)
5896 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st
));
5900 /* If we're at the end, make sure a block name wasn't required. */
5901 if (gfc_match_eos () == MATCH_YES
)
5904 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
5905 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
&& *st
!= ST_END_BLOCK
5906 && *st
!= ST_END_ASSOCIATE
&& *st
!= ST_END_CRITICAL
)
5912 gfc_error ("Expected block name of '%s' in %s statement at %C",
5913 block_name
, gfc_ascii_statement (*st
));
5918 /* END INTERFACE has a special handler for its several possible endings. */
5919 if (*st
== ST_END_INTERFACE
)
5920 return gfc_match_end_interface ();
5922 /* We haven't hit the end of statement, so what is left must be an
5924 m
= gfc_match_space ();
5926 m
= gfc_match_name (name
);
5929 gfc_error ("Expected terminating name at %C");
5933 if (block_name
== NULL
)
5936 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
5938 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
5939 gfc_ascii_statement (*st
));
5942 /* Procedure pointer as function result. */
5943 else if (strcmp (block_name
, "ppr@") == 0
5944 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
5946 gfc_error ("Expected label '%s' for %s statement at %C",
5947 gfc_current_block ()->ns
->proc_name
->name
,
5948 gfc_ascii_statement (*st
));
5952 if (gfc_match_eos () == MATCH_YES
)
5956 gfc_syntax_error (*st
);
5959 gfc_current_locus
= old_loc
;
5965 /***************** Attribute declaration statements ****************/
5967 /* Set the attribute of a single variable. */
5972 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5980 m
= gfc_match_name (name
);
5984 if (find_special (name
, &sym
, false))
5987 var_locus
= gfc_current_locus
;
5989 /* Deal with possible array specification for certain attributes. */
5990 if (current_attr
.dimension
5991 || current_attr
.codimension
5992 || current_attr
.allocatable
5993 || current_attr
.pointer
5994 || current_attr
.target
)
5996 m
= gfc_match_array_spec (&as
, !current_attr
.codimension
,
5997 !current_attr
.dimension
5998 && !current_attr
.pointer
5999 && !current_attr
.target
);
6000 if (m
== MATCH_ERROR
)
6003 if (current_attr
.dimension
&& m
== MATCH_NO
)
6005 gfc_error ("Missing array specification at %L in DIMENSION "
6006 "statement", &var_locus
);
6011 if (current_attr
.dimension
&& sym
->value
)
6013 gfc_error ("Dimensions specified for %s at %L after its "
6014 "initialisation", sym
->name
, &var_locus
);
6019 if (current_attr
.codimension
&& m
== MATCH_NO
)
6021 gfc_error ("Missing array specification at %L in CODIMENSION "
6022 "statement", &var_locus
);
6027 if ((current_attr
.allocatable
|| current_attr
.pointer
)
6028 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
6030 gfc_error ("Array specification must be deferred at %L", &var_locus
);
6036 /* Update symbol table. DIMENSION attribute is set in
6037 gfc_set_array_spec(). For CLASS variables, this must be applied
6038 to the first component, or '_data' field. */
6039 if (sym
->ts
.type
== BT_CLASS
&& sym
->ts
.u
.derived
->attr
.is_class
)
6041 if (gfc_copy_attr (&CLASS_DATA (sym
)->attr
, ¤t_attr
, &var_locus
)
6050 if (current_attr
.dimension
== 0 && current_attr
.codimension
== 0
6051 && gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
) == FAILURE
)
6058 if (sym
->ts
.type
== BT_CLASS
6059 && gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
, false) == FAILURE
)
6065 if (gfc_set_array_spec (sym
, as
, &var_locus
) == FAILURE
)
6071 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
6073 /* Fix the array spec. */
6074 m
= gfc_mod_pointee_as (sym
->as
);
6075 if (m
== MATCH_ERROR
)
6079 if (gfc_add_attribute (&sym
->attr
, &var_locus
) == FAILURE
)
6085 if ((current_attr
.external
|| current_attr
.intrinsic
)
6086 && sym
->attr
.flavor
!= FL_PROCEDURE
6087 && gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
) == FAILURE
)
6093 add_hidden_procptr_result (sym
);
6098 gfc_free_array_spec (as
);
6103 /* Generic attribute declaration subroutine. Used for attributes that
6104 just have a list of names. */
6111 /* Gobble the optional double colon, by simply ignoring the result
6121 if (gfc_match_eos () == MATCH_YES
)
6127 if (gfc_match_char (',') != MATCH_YES
)
6129 gfc_error ("Unexpected character in variable list at %C");
6139 /* This routine matches Cray Pointer declarations of the form:
6140 pointer ( <pointer>, <pointee> )
6142 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
6143 The pointer, if already declared, should be an integer. Otherwise, we
6144 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
6145 be either a scalar, or an array declaration. No space is allocated for
6146 the pointee. For the statement
6147 pointer (ipt, ar(10))
6148 any subsequent uses of ar will be translated (in C-notation) as
6149 ar(i) => ((<type> *) ipt)(i)
6150 After gimplification, pointee variable will disappear in the code. */
6153 cray_pointer_decl (void)
6156 gfc_array_spec
*as
= NULL
;
6157 gfc_symbol
*cptr
; /* Pointer symbol. */
6158 gfc_symbol
*cpte
; /* Pointee symbol. */
6164 if (gfc_match_char ('(') != MATCH_YES
)
6166 gfc_error ("Expected '(' at %C");
6170 /* Match pointer. */
6171 var_locus
= gfc_current_locus
;
6172 gfc_clear_attr (¤t_attr
);
6173 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
6174 current_ts
.type
= BT_INTEGER
;
6175 current_ts
.kind
= gfc_index_integer_kind
;
6177 m
= gfc_match_symbol (&cptr
, 0);
6180 gfc_error ("Expected variable name at %C");
6184 if (gfc_add_cray_pointer (&cptr
->attr
, &var_locus
) == FAILURE
)
6187 gfc_set_sym_referenced (cptr
);
6189 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
6191 cptr
->ts
.type
= BT_INTEGER
;
6192 cptr
->ts
.kind
= gfc_index_integer_kind
;
6194 else if (cptr
->ts
.type
!= BT_INTEGER
)
6196 gfc_error ("Cray pointer at %C must be an integer");
6199 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
6200 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
6201 " memory addresses require %d bytes",
6202 cptr
->ts
.kind
, gfc_index_integer_kind
);
6204 if (gfc_match_char (',') != MATCH_YES
)
6206 gfc_error ("Expected \",\" at %C");
6210 /* Match Pointee. */
6211 var_locus
= gfc_current_locus
;
6212 gfc_clear_attr (¤t_attr
);
6213 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
6214 current_ts
.type
= BT_UNKNOWN
;
6215 current_ts
.kind
= 0;
6217 m
= gfc_match_symbol (&cpte
, 0);
6220 gfc_error ("Expected variable name at %C");
6224 /* Check for an optional array spec. */
6225 m
= gfc_match_array_spec (&as
, true, false);
6226 if (m
== MATCH_ERROR
)
6228 gfc_free_array_spec (as
);
6231 else if (m
== MATCH_NO
)
6233 gfc_free_array_spec (as
);
6237 if (gfc_add_cray_pointee (&cpte
->attr
, &var_locus
) == FAILURE
)
6240 gfc_set_sym_referenced (cpte
);
6242 if (cpte
->as
== NULL
)
6244 if (gfc_set_array_spec (cpte
, as
, &var_locus
) == FAILURE
)
6245 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6247 else if (as
!= NULL
)
6249 gfc_error ("Duplicate array spec for Cray pointee at %C");
6250 gfc_free_array_spec (as
);
6256 if (cpte
->as
!= NULL
)
6258 /* Fix array spec. */
6259 m
= gfc_mod_pointee_as (cpte
->as
);
6260 if (m
== MATCH_ERROR
)
6264 /* Point the Pointee at the Pointer. */
6265 cpte
->cp_pointer
= cptr
;
6267 if (gfc_match_char (')') != MATCH_YES
)
6269 gfc_error ("Expected \")\" at %C");
6272 m
= gfc_match_char (',');
6274 done
= true; /* Stop searching for more declarations. */
6278 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
6279 || gfc_match_eos () != MATCH_YES
)
6281 gfc_error ("Expected \",\" or end of statement at %C");
6289 gfc_match_external (void)
6292 gfc_clear_attr (¤t_attr
);
6293 current_attr
.external
= 1;
6295 return attr_decl ();
6300 gfc_match_intent (void)
6304 /* This is not allowed within a BLOCK construct! */
6305 if (gfc_current_state () == COMP_BLOCK
)
6307 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6311 intent
= match_intent_spec ();
6312 if (intent
== INTENT_UNKNOWN
)
6315 gfc_clear_attr (¤t_attr
);
6316 current_attr
.intent
= intent
;
6318 return attr_decl ();
6323 gfc_match_intrinsic (void)
6326 gfc_clear_attr (¤t_attr
);
6327 current_attr
.intrinsic
= 1;
6329 return attr_decl ();
6334 gfc_match_optional (void)
6336 /* This is not allowed within a BLOCK construct! */
6337 if (gfc_current_state () == COMP_BLOCK
)
6339 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6343 gfc_clear_attr (¤t_attr
);
6344 current_attr
.optional
= 1;
6346 return attr_decl ();
6351 gfc_match_pointer (void)
6353 gfc_gobble_whitespace ();
6354 if (gfc_peek_ascii_char () == '(')
6356 if (!gfc_option
.flag_cray_pointer
)
6358 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6362 return cray_pointer_decl ();
6366 gfc_clear_attr (¤t_attr
);
6367 current_attr
.pointer
= 1;
6369 return attr_decl ();
6375 gfc_match_allocatable (void)
6377 gfc_clear_attr (¤t_attr
);
6378 current_attr
.allocatable
= 1;
6380 return attr_decl ();
6385 gfc_match_codimension (void)
6387 gfc_clear_attr (¤t_attr
);
6388 current_attr
.codimension
= 1;
6390 return attr_decl ();
6395 gfc_match_contiguous (void)
6397 if (gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: CONTIGUOUS statement at %C")
6401 gfc_clear_attr (¤t_attr
);
6402 current_attr
.contiguous
= 1;
6404 return attr_decl ();
6409 gfc_match_dimension (void)
6411 gfc_clear_attr (¤t_attr
);
6412 current_attr
.dimension
= 1;
6414 return attr_decl ();
6419 gfc_match_target (void)
6421 gfc_clear_attr (¤t_attr
);
6422 current_attr
.target
= 1;
6424 return attr_decl ();
6428 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6432 access_attr_decl (gfc_statement st
)
6434 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6435 interface_type type
;
6438 gfc_intrinsic_op op
;
6441 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6446 m
= gfc_match_generic_spec (&type
, name
, &op
);
6449 if (m
== MATCH_ERROR
)
6454 case INTERFACE_NAMELESS
:
6455 case INTERFACE_ABSTRACT
:
6458 case INTERFACE_GENERIC
:
6459 if (gfc_get_symbol (name
, NULL
, &sym
))
6462 if (gfc_add_access (&sym
->attr
, (st
== ST_PUBLIC
)
6463 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
6464 sym
->name
, NULL
) == FAILURE
)
6469 case INTERFACE_INTRINSIC_OP
:
6470 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
6472 gfc_current_ns
->operator_access
[op
] =
6473 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6477 gfc_error ("Access specification of the %s operator at %C has "
6478 "already been specified", gfc_op2string (op
));
6484 case INTERFACE_USER_OP
:
6485 uop
= gfc_get_uop (name
);
6487 if (uop
->access
== ACCESS_UNKNOWN
)
6489 uop
->access
= (st
== ST_PUBLIC
)
6490 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6494 gfc_error ("Access specification of the .%s. operator at %C "
6495 "has already been specified", sym
->name
);
6502 if (gfc_match_char (',') == MATCH_NO
)
6506 if (gfc_match_eos () != MATCH_YES
)
6511 gfc_syntax_error (st
);
6519 gfc_match_protected (void)
6524 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6526 gfc_error ("PROTECTED at %C only allowed in specification "
6527 "part of a module");
6532 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED statement at %C")
6536 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6541 if (gfc_match_eos () == MATCH_YES
)
6546 m
= gfc_match_symbol (&sym
, 0);
6550 if (gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6563 if (gfc_match_eos () == MATCH_YES
)
6565 if (gfc_match_char (',') != MATCH_YES
)
6572 gfc_error ("Syntax error in PROTECTED statement at %C");
6577 /* The PRIVATE statement is a bit weird in that it can be an attribute
6578 declaration, but also works as a standalone statement inside of a
6579 type declaration or a module. */
6582 gfc_match_private (gfc_statement
*st
)
6585 if (gfc_match ("private") != MATCH_YES
)
6588 if (gfc_current_state () != COMP_MODULE
6589 && !(gfc_current_state () == COMP_DERIVED
6590 && gfc_state_stack
->previous
6591 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
6592 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6593 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
6594 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
6596 gfc_error ("PRIVATE statement at %C is only allowed in the "
6597 "specification part of a module");
6601 if (gfc_current_state () == COMP_DERIVED
)
6603 if (gfc_match_eos () == MATCH_YES
)
6609 gfc_syntax_error (ST_PRIVATE
);
6613 if (gfc_match_eos () == MATCH_YES
)
6620 return access_attr_decl (ST_PRIVATE
);
6625 gfc_match_public (gfc_statement
*st
)
6628 if (gfc_match ("public") != MATCH_YES
)
6631 if (gfc_current_state () != COMP_MODULE
)
6633 gfc_error ("PUBLIC statement at %C is only allowed in the "
6634 "specification part of a module");
6638 if (gfc_match_eos () == MATCH_YES
)
6645 return access_attr_decl (ST_PUBLIC
);
6649 /* Workhorse for gfc_match_parameter. */
6659 m
= gfc_match_symbol (&sym
, 0);
6661 gfc_error ("Expected variable name at %C in PARAMETER statement");
6666 if (gfc_match_char ('=') == MATCH_NO
)
6668 gfc_error ("Expected = sign in PARAMETER statement at %C");
6672 m
= gfc_match_init_expr (&init
);
6674 gfc_error ("Expected expression at %C in PARAMETER statement");
6678 if (sym
->ts
.type
== BT_UNKNOWN
6679 && gfc_set_default_type (sym
, 1, NULL
) == FAILURE
)
6685 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
6686 || gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
) == FAILURE
)
6694 gfc_error ("Initializing already initialized variable at %C");
6699 t
= add_init_expr_to_sym (sym
->name
, &init
, &gfc_current_locus
);
6700 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
6703 gfc_free_expr (init
);
6708 /* Match a parameter statement, with the weird syntax that these have. */
6711 gfc_match_parameter (void)
6715 if (gfc_match_char ('(') == MATCH_NO
)
6724 if (gfc_match (" )%t") == MATCH_YES
)
6727 if (gfc_match_char (',') != MATCH_YES
)
6729 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6739 /* Save statements have a special syntax. */
6742 gfc_match_save (void)
6744 char n
[GFC_MAX_SYMBOL_LEN
+1];
6749 if (gfc_match_eos () == MATCH_YES
)
6751 if (gfc_current_ns
->seen_save
)
6753 if (gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
6754 "follows previous SAVE statement")
6759 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
6763 if (gfc_current_ns
->save_all
)
6765 if (gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
6766 "blanket SAVE statement")
6775 m
= gfc_match_symbol (&sym
, 0);
6779 if (gfc_add_save (&sym
->attr
, SAVE_EXPLICIT
, sym
->name
,
6780 &gfc_current_locus
) == FAILURE
)
6791 m
= gfc_match (" / %n /", &n
);
6792 if (m
== MATCH_ERROR
)
6797 c
= gfc_get_common (n
, 0);
6800 gfc_current_ns
->seen_save
= 1;
6803 if (gfc_match_eos () == MATCH_YES
)
6805 if (gfc_match_char (',') != MATCH_YES
)
6812 gfc_error ("Syntax error in SAVE statement at %C");
6818 gfc_match_value (void)
6823 /* This is not allowed within a BLOCK construct! */
6824 if (gfc_current_state () == COMP_BLOCK
)
6826 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6830 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE statement at %C")
6834 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6839 if (gfc_match_eos () == MATCH_YES
)
6844 m
= gfc_match_symbol (&sym
, 0);
6848 if (gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6861 if (gfc_match_eos () == MATCH_YES
)
6863 if (gfc_match_char (',') != MATCH_YES
)
6870 gfc_error ("Syntax error in VALUE statement at %C");
6876 gfc_match_volatile (void)
6881 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VOLATILE statement at %C")
6885 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6890 if (gfc_match_eos () == MATCH_YES
)
6895 /* VOLATILE is special because it can be added to host-associated
6896 symbols locally. Except for coarrays. */
6897 m
= gfc_match_symbol (&sym
, 1);
6901 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
6902 for variable in a BLOCK which is defined outside of the BLOCK. */
6903 if (sym
->ns
!= gfc_current_ns
&& sym
->attr
.codimension
)
6905 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
6906 "%C, which is use-/host-associated", sym
->name
);
6909 if (gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6922 if (gfc_match_eos () == MATCH_YES
)
6924 if (gfc_match_char (',') != MATCH_YES
)
6931 gfc_error ("Syntax error in VOLATILE statement at %C");
6937 gfc_match_asynchronous (void)
6942 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ASYNCHRONOUS statement at %C")
6946 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6951 if (gfc_match_eos () == MATCH_YES
)
6956 /* ASYNCHRONOUS is special because it can be added to host-associated
6958 m
= gfc_match_symbol (&sym
, 1);
6962 if (gfc_add_asynchronous (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6975 if (gfc_match_eos () == MATCH_YES
)
6977 if (gfc_match_char (',') != MATCH_YES
)
6984 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6989 /* Match a module procedure statement. Note that we have to modify
6990 symbols in the parent's namespace because the current one was there
6991 to receive symbols that are in an interface's formal argument list. */
6994 gfc_match_modproc (void)
6996 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6999 gfc_namespace
*module_ns
;
7000 gfc_interface
*old_interface_head
, *interface
;
7002 if (gfc_state_stack
->state
!= COMP_INTERFACE
7003 || gfc_state_stack
->previous
== NULL
7004 || current_interface
.type
== INTERFACE_NAMELESS
7005 || current_interface
.type
== INTERFACE_ABSTRACT
)
7007 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
7012 module_ns
= gfc_current_ns
->parent
;
7013 for (; module_ns
; module_ns
= module_ns
->parent
)
7014 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
7015 || module_ns
->proc_name
->attr
.flavor
== FL_PROGRAM
7016 || (module_ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
7017 && !module_ns
->proc_name
->attr
.contained
))
7020 if (module_ns
== NULL
)
7023 /* Store the current state of the interface. We will need it if we
7024 end up with a syntax error and need to recover. */
7025 old_interface_head
= gfc_current_interface_head ();
7029 locus old_locus
= gfc_current_locus
;
7032 m
= gfc_match_name (name
);
7038 /* Check for syntax error before starting to add symbols to the
7039 current namespace. */
7040 if (gfc_match_eos () == MATCH_YES
)
7042 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7045 /* Now we're sure the syntax is valid, we process this item
7047 if (gfc_get_symbol (name
, module_ns
, &sym
))
7050 if (sym
->attr
.intrinsic
)
7052 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
7053 "PROCEDURE", &old_locus
);
7057 if (sym
->attr
.proc
!= PROC_MODULE
7058 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
7059 sym
->name
, NULL
) == FAILURE
)
7062 if (gfc_add_interface (sym
) == FAILURE
)
7065 sym
->attr
.mod_proc
= 1;
7066 sym
->declared_at
= old_locus
;
7075 /* Restore the previous state of the interface. */
7076 interface
= gfc_current_interface_head ();
7077 gfc_set_current_interface_head (old_interface_head
);
7079 /* Free the new interfaces. */
7080 while (interface
!= old_interface_head
)
7082 gfc_interface
*i
= interface
->next
;
7083 gfc_free (interface
);
7087 /* And issue a syntax error. */
7088 gfc_syntax_error (ST_MODULE_PROC
);
7093 /* Check a derived type that is being extended. */
7095 check_extended_derived_type (char *name
)
7097 gfc_symbol
*extended
;
7099 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
7101 gfc_error ("Ambiguous symbol in TYPE definition at %C");
7107 gfc_error ("No such symbol in TYPE definition at %C");
7111 if (extended
->attr
.flavor
!= FL_DERIVED
)
7113 gfc_error ("'%s' in EXTENDS expression at %C is not a "
7114 "derived type", name
);
7118 if (extended
->attr
.is_bind_c
)
7120 gfc_error ("'%s' cannot be extended at %C because it "
7121 "is BIND(C)", extended
->name
);
7125 if (extended
->attr
.sequence
)
7127 gfc_error ("'%s' cannot be extended at %C because it "
7128 "is a SEQUENCE type", extended
->name
);
7136 /* Match the optional attribute specifiers for a type declaration.
7137 Return MATCH_ERROR if an error is encountered in one of the handled
7138 attributes (public, private, bind(c)), MATCH_NO if what's found is
7139 not a handled attribute, and MATCH_YES otherwise. TODO: More error
7140 checking on attribute conflicts needs to be done. */
7143 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
7145 /* See if the derived type is marked as private. */
7146 if (gfc_match (" , private") == MATCH_YES
)
7148 if (gfc_current_state () != COMP_MODULE
)
7150 gfc_error ("Derived type at %C can only be PRIVATE in the "
7151 "specification part of a module");
7155 if (gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
) == FAILURE
)
7158 else if (gfc_match (" , public") == MATCH_YES
)
7160 if (gfc_current_state () != COMP_MODULE
)
7162 gfc_error ("Derived type at %C can only be PUBLIC in the "
7163 "specification part of a module");
7167 if (gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
) == FAILURE
)
7170 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
7172 /* If the type is defined to be bind(c) it then needs to make
7173 sure that all fields are interoperable. This will
7174 need to be a semantic check on the finished derived type.
7175 See 15.2.3 (lines 9-12) of F2003 draft. */
7176 if (gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0) != SUCCESS
)
7179 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
7181 else if (gfc_match (" , abstract") == MATCH_YES
)
7183 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ABSTRACT type at %C")
7187 if (gfc_add_abstract (attr
, &gfc_current_locus
) == FAILURE
)
7190 else if (name
&& gfc_match(" , extends ( %n )", name
) == MATCH_YES
)
7192 if (gfc_add_extension (attr
, &gfc_current_locus
) == FAILURE
)
7198 /* If we get here, something matched. */
7203 /* Match the beginning of a derived type declaration. If a type name
7204 was the result of a function, then it is possible to have a symbol
7205 already to be known as a derived type yet have no components. */
7208 gfc_match_derived_decl (void)
7210 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7211 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
7212 symbol_attribute attr
;
7214 gfc_symbol
*extended
;
7216 match is_type_attr_spec
= MATCH_NO
;
7217 bool seen_attr
= false;
7219 if (gfc_current_state () == COMP_DERIVED
)
7224 gfc_clear_attr (&attr
);
7229 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
7230 if (is_type_attr_spec
== MATCH_ERROR
)
7232 if (is_type_attr_spec
== MATCH_YES
)
7234 } while (is_type_attr_spec
== MATCH_YES
);
7236 /* Deal with derived type extensions. The extension attribute has
7237 been added to 'attr' but now the parent type must be found and
7240 extended
= check_extended_derived_type (parent
);
7242 if (parent
[0] && !extended
)
7245 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
7247 gfc_error ("Expected :: in TYPE definition at %C");
7251 m
= gfc_match (" %n%t", name
);
7255 /* Make sure the name is not the name of an intrinsic type. */
7256 if (gfc_is_intrinsic_typename (name
))
7258 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7263 if (gfc_get_symbol (name
, NULL
, &sym
))
7266 if (sym
->ts
.type
!= BT_UNKNOWN
)
7268 gfc_error ("Derived type name '%s' at %C already has a basic type "
7269 "of %s", sym
->name
, gfc_typename (&sym
->ts
));
7273 /* The symbol may already have the derived attribute without the
7274 components. The ways this can happen is via a function
7275 definition, an INTRINSIC statement or a subtype in another
7276 derived type that is a pointer. The first part of the AND clause
7277 is true if the symbol is not the return value of a function. */
7278 if (sym
->attr
.flavor
!= FL_DERIVED
7279 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
7282 if (sym
->components
!= NULL
|| sym
->attr
.zero_comp
)
7284 gfc_error ("Derived type definition of '%s' at %C has already been "
7285 "defined", sym
->name
);
7289 if (attr
.access
!= ACCESS_UNKNOWN
7290 && gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
) == FAILURE
)
7293 /* See if the derived type was labeled as bind(c). */
7294 if (attr
.is_bind_c
!= 0)
7295 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
7297 /* Construct the f2k_derived namespace if it is not yet there. */
7298 if (!sym
->f2k_derived
)
7299 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7301 if (extended
&& !sym
->components
)
7306 /* Add the extended derived type as the first component. */
7307 gfc_add_component (sym
, parent
, &p
);
7309 gfc_set_sym_referenced (extended
);
7311 p
->ts
.type
= BT_DERIVED
;
7312 p
->ts
.u
.derived
= extended
;
7313 p
->initializer
= gfc_default_initializer (&p
->ts
);
7315 /* Set extension level. */
7316 if (extended
->attr
.extension
== 255)
7318 /* Since the extension field is 8 bit wide, we can only have
7319 up to 255 extension levels. */
7320 gfc_error ("Maximum extension level reached with type '%s' at %L",
7321 extended
->name
, &extended
->declared_at
);
7324 sym
->attr
.extension
= extended
->attr
.extension
+ 1;
7326 /* Provide the links between the extended type and its extension. */
7327 if (!extended
->f2k_derived
)
7328 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
7329 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
7333 if (!sym
->hash_value
)
7334 /* Set the hash for the compound name for this type. */
7335 sym
->hash_value
= gfc_hash_value (sym
);
7337 /* Take over the ABSTRACT attribute. */
7338 sym
->attr
.abstract
= attr
.abstract
;
7340 gfc_new_block
= sym
;
7346 /* Cray Pointees can be declared as:
7347 pointer (ipt, a (n,m,...,*)) */
7350 gfc_mod_pointee_as (gfc_array_spec
*as
)
7352 as
->cray_pointee
= true; /* This will be useful to know later. */
7353 if (as
->type
== AS_ASSUMED_SIZE
)
7354 as
->cp_was_assumed
= true;
7355 else if (as
->type
== AS_ASSUMED_SHAPE
)
7357 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7364 /* Match the enum definition statement, here we are trying to match
7365 the first line of enum definition statement.
7366 Returns MATCH_YES if match is found. */
7369 gfc_match_enum (void)
7373 m
= gfc_match_eos ();
7377 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ENUM and ENUMERATOR at %C")
7385 /* Returns an initializer whose value is one higher than the value of the
7386 LAST_INITIALIZER argument. If the argument is NULL, the
7387 initializers value will be set to zero. The initializer's kind
7388 will be set to gfc_c_int_kind.
7390 If -fshort-enums is given, the appropriate kind will be selected
7391 later after all enumerators have been parsed. A warning is issued
7392 here if an initializer exceeds gfc_c_int_kind. */
7395 enum_initializer (gfc_expr
*last_initializer
, locus where
)
7398 result
= gfc_get_constant_expr (BT_INTEGER
, gfc_c_int_kind
, &where
);
7400 mpz_init (result
->value
.integer
);
7402 if (last_initializer
!= NULL
)
7404 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
7405 result
->where
= last_initializer
->where
;
7407 if (gfc_check_integer_range (result
->value
.integer
,
7408 gfc_c_int_kind
) != ARITH_OK
)
7410 gfc_error ("Enumerator exceeds the C integer type at %C");
7416 /* Control comes here, if it's the very first enumerator and no
7417 initializer has been given. It will be initialized to zero. */
7418 mpz_set_si (result
->value
.integer
, 0);
7425 /* Match a variable name with an optional initializer. When this
7426 subroutine is called, a variable is expected to be parsed next.
7427 Depending on what is happening at the moment, updates either the
7428 symbol table or the current interface. */
7431 enumerator_decl (void)
7433 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7434 gfc_expr
*initializer
;
7435 gfc_array_spec
*as
= NULL
;
7443 old_locus
= gfc_current_locus
;
7445 /* When we get here, we've just matched a list of attributes and
7446 maybe a type and a double colon. The next thing we expect to see
7447 is the name of the symbol. */
7448 m
= gfc_match_name (name
);
7452 var_locus
= gfc_current_locus
;
7454 /* OK, we've successfully matched the declaration. Now put the
7455 symbol in the current namespace. If we fail to create the symbol,
7457 if (build_sym (name
, NULL
, false, &as
, &var_locus
) == FAILURE
)
7463 /* The double colon must be present in order to have initializers.
7464 Otherwise the statement is ambiguous with an assignment statement. */
7467 if (gfc_match_char ('=') == MATCH_YES
)
7469 m
= gfc_match_init_expr (&initializer
);
7472 gfc_error ("Expected an initialization expression at %C");
7481 /* If we do not have an initializer, the initialization value of the
7482 previous enumerator (stored in last_initializer) is incremented
7483 by 1 and is used to initialize the current enumerator. */
7484 if (initializer
== NULL
)
7485 initializer
= enum_initializer (last_initializer
, old_locus
);
7487 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
7489 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7495 /* Store this current initializer, for the next enumerator variable
7496 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7497 use last_initializer below. */
7498 last_initializer
= initializer
;
7499 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
7501 /* Maintain enumerator history. */
7502 gfc_find_symbol (name
, NULL
, 0, &sym
);
7503 create_enum_history (sym
, last_initializer
);
7505 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
7508 /* Free stuff up and return. */
7509 gfc_free_expr (initializer
);
7515 /* Match the enumerator definition statement. */
7518 gfc_match_enumerator_def (void)
7523 gfc_clear_ts (¤t_ts
);
7525 m
= gfc_match (" enumerator");
7529 m
= gfc_match (" :: ");
7530 if (m
== MATCH_ERROR
)
7533 colon_seen
= (m
== MATCH_YES
);
7535 if (gfc_current_state () != COMP_ENUM
)
7537 gfc_error ("ENUM definition statement expected before %C");
7538 gfc_free_enum_history ();
7542 (¤t_ts
)->type
= BT_INTEGER
;
7543 (¤t_ts
)->kind
= gfc_c_int_kind
;
7545 gfc_clear_attr (¤t_attr
);
7546 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
7555 m
= enumerator_decl ();
7556 if (m
== MATCH_ERROR
)
7558 gfc_free_enum_history ();
7564 if (gfc_match_eos () == MATCH_YES
)
7566 if (gfc_match_char (',') != MATCH_YES
)
7570 if (gfc_current_state () == COMP_ENUM
)
7572 gfc_free_enum_history ();
7573 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7578 gfc_free_array_spec (current_as
);
7585 /* Match binding attributes. */
7588 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
7590 bool found_passing
= false;
7591 bool seen_ptr
= false;
7592 match m
= MATCH_YES
;
7594 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7595 this case the defaults are in there. */
7596 ba
->access
= ACCESS_UNKNOWN
;
7597 ba
->pass_arg
= NULL
;
7598 ba
->pass_arg_num
= 0;
7600 ba
->non_overridable
= 0;
7604 /* If we find a comma, we believe there are binding attributes. */
7605 m
= gfc_match_char (',');
7611 /* Access specifier. */
7613 m
= gfc_match (" public");
7614 if (m
== MATCH_ERROR
)
7618 if (ba
->access
!= ACCESS_UNKNOWN
)
7620 gfc_error ("Duplicate access-specifier at %C");
7624 ba
->access
= ACCESS_PUBLIC
;
7628 m
= gfc_match (" private");
7629 if (m
== MATCH_ERROR
)
7633 if (ba
->access
!= ACCESS_UNKNOWN
)
7635 gfc_error ("Duplicate access-specifier at %C");
7639 ba
->access
= ACCESS_PRIVATE
;
7643 /* If inside GENERIC, the following is not allowed. */
7648 m
= gfc_match (" nopass");
7649 if (m
== MATCH_ERROR
)
7655 gfc_error ("Binding attributes already specify passing,"
7656 " illegal NOPASS at %C");
7660 found_passing
= true;
7665 /* PASS possibly including argument. */
7666 m
= gfc_match (" pass");
7667 if (m
== MATCH_ERROR
)
7671 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
7675 gfc_error ("Binding attributes already specify passing,"
7676 " illegal PASS at %C");
7680 m
= gfc_match (" ( %n )", arg
);
7681 if (m
== MATCH_ERROR
)
7684 ba
->pass_arg
= gfc_get_string (arg
);
7685 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
7687 found_passing
= true;
7695 m
= gfc_match (" pointer");
7696 if (m
== MATCH_ERROR
)
7702 gfc_error ("Duplicate POINTER attribute at %C");
7712 /* NON_OVERRIDABLE flag. */
7713 m
= gfc_match (" non_overridable");
7714 if (m
== MATCH_ERROR
)
7718 if (ba
->non_overridable
)
7720 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7724 ba
->non_overridable
= 1;
7728 /* DEFERRED flag. */
7729 m
= gfc_match (" deferred");
7730 if (m
== MATCH_ERROR
)
7736 gfc_error ("Duplicate DEFERRED at %C");
7747 /* Nothing matching found. */
7749 gfc_error ("Expected access-specifier at %C");
7751 gfc_error ("Expected binding attribute at %C");
7754 while (gfc_match_char (',') == MATCH_YES
);
7756 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7757 if (ba
->non_overridable
&& ba
->deferred
)
7759 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7766 if (ba
->access
== ACCESS_UNKNOWN
)
7767 ba
->access
= gfc_typebound_default_access
;
7769 if (ppc
&& !seen_ptr
)
7771 gfc_error ("POINTER attribute is required for procedure pointer component"
7783 /* Match a PROCEDURE specific binding inside a derived type. */
7786 match_procedure_in_type (void)
7788 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7789 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
7790 char* target
= NULL
, *ifc
= NULL
;
7791 gfc_typebound_proc tb
;
7800 /* Check current state. */
7801 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
7802 block
= gfc_state_stack
->previous
->sym
;
7805 /* Try to match PROCEDURE(interface). */
7806 if (gfc_match (" (") == MATCH_YES
)
7808 m
= gfc_match_name (target_buf
);
7809 if (m
== MATCH_ERROR
)
7813 gfc_error ("Interface-name expected after '(' at %C");
7817 if (gfc_match (" )") != MATCH_YES
)
7819 gfc_error ("')' expected at %C");
7826 /* Construct the data structure. */
7827 memset (&tb
, 0, sizeof (tb
));
7828 tb
.where
= gfc_current_locus
;
7830 /* Match binding attributes. */
7831 m
= match_binding_attributes (&tb
, false, false);
7832 if (m
== MATCH_ERROR
)
7834 seen_attrs
= (m
== MATCH_YES
);
7836 /* Check that attribute DEFERRED is given if an interface is specified. */
7837 if (tb
.deferred
&& !ifc
)
7839 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7842 if (ifc
&& !tb
.deferred
)
7844 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7848 /* Match the colons. */
7849 m
= gfc_match (" ::");
7850 if (m
== MATCH_ERROR
)
7852 seen_colons
= (m
== MATCH_YES
);
7853 if (seen_attrs
&& !seen_colons
)
7855 gfc_error ("Expected '::' after binding-attributes at %C");
7859 /* Match the binding names. */
7862 m
= gfc_match_name (name
);
7863 if (m
== MATCH_ERROR
)
7867 gfc_error ("Expected binding name at %C");
7871 if (num
>1 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: PROCEDURE list"
7872 " at %C") == FAILURE
)
7875 /* Try to match the '=> target', if it's there. */
7877 m
= gfc_match (" =>");
7878 if (m
== MATCH_ERROR
)
7884 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7890 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7895 m
= gfc_match_name (target_buf
);
7896 if (m
== MATCH_ERROR
)
7900 gfc_error ("Expected binding target after '=>' at %C");
7903 target
= target_buf
;
7906 /* If no target was found, it has the same name as the binding. */
7910 /* Get the namespace to insert the symbols into. */
7911 ns
= block
->f2k_derived
;
7914 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7915 if (tb
.deferred
&& !block
->attr
.abstract
)
7917 gfc_error ("Type '%s' containing DEFERRED binding at %C "
7918 "is not ABSTRACT", block
->name
);
7922 /* See if we already have a binding with this name in the symtree which
7923 would be an error. If a GENERIC already targetted this binding, it may
7924 be already there but then typebound is still NULL. */
7925 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7926 if (stree
&& stree
->n
.tb
)
7928 gfc_error ("There is already a procedure with binding name '%s' for "
7929 "the derived type '%s' at %C", name
, block
->name
);
7933 /* Insert it and set attributes. */
7937 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7940 stree
->n
.tb
= gfc_get_typebound_proc (&tb
);
7942 if (gfc_get_sym_tree (target
, gfc_current_ns
, &stree
->n
.tb
->u
.specific
,
7945 gfc_set_sym_referenced (stree
->n
.tb
->u
.specific
->n
.sym
);
7947 if (gfc_match_eos () == MATCH_YES
)
7949 if (gfc_match_char (',') != MATCH_YES
)
7954 gfc_error ("Syntax error in PROCEDURE statement at %C");
7959 /* Match a GENERIC procedure binding inside a derived type. */
7962 gfc_match_generic (void)
7964 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7965 char bind_name
[GFC_MAX_SYMBOL_LEN
+ 16]; /* Allow space for OPERATOR(...). */
7967 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
7968 gfc_typebound_proc
* tb
;
7970 interface_type op_type
;
7971 gfc_intrinsic_op op
;
7974 /* Check current state. */
7975 if (gfc_current_state () == COMP_DERIVED
)
7977 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7980 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
7982 block
= gfc_state_stack
->previous
->sym
;
7983 ns
= block
->f2k_derived
;
7984 gcc_assert (block
&& ns
);
7986 memset (&tbattr
, 0, sizeof (tbattr
));
7987 tbattr
.where
= gfc_current_locus
;
7989 /* See if we get an access-specifier. */
7990 m
= match_binding_attributes (&tbattr
, true, false);
7991 if (m
== MATCH_ERROR
)
7994 /* Now the colons, those are required. */
7995 if (gfc_match (" ::") != MATCH_YES
)
7997 gfc_error ("Expected '::' at %C");
8001 /* Match the binding name; depending on type (operator / generic) format
8002 it for future error messages into bind_name. */
8004 m
= gfc_match_generic_spec (&op_type
, name
, &op
);
8005 if (m
== MATCH_ERROR
)
8009 gfc_error ("Expected generic name or operator descriptor at %C");
8015 case INTERFACE_GENERIC
:
8016 snprintf (bind_name
, sizeof (bind_name
), "%s", name
);
8019 case INTERFACE_USER_OP
:
8020 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(.%s.)", name
);
8023 case INTERFACE_INTRINSIC_OP
:
8024 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(%s)",
8025 gfc_op2string (op
));
8032 /* Match the required =>. */
8033 if (gfc_match (" =>") != MATCH_YES
)
8035 gfc_error ("Expected '=>' at %C");
8039 /* Try to find existing GENERIC binding with this name / for this operator;
8040 if there is something, check that it is another GENERIC and then extend
8041 it rather than building a new node. Otherwise, create it and put it
8042 at the right position. */
8046 case INTERFACE_USER_OP
:
8047 case INTERFACE_GENERIC
:
8049 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8052 st
= gfc_find_symtree (is_op
? ns
->tb_uop_root
: ns
->tb_sym_root
, name
);
8064 case INTERFACE_INTRINSIC_OP
:
8074 if (!tb
->is_generic
)
8076 gcc_assert (op_type
== INTERFACE_GENERIC
);
8077 gfc_error ("There's already a non-generic procedure with binding name"
8078 " '%s' for the derived type '%s' at %C",
8079 bind_name
, block
->name
);
8083 if (tb
->access
!= tbattr
.access
)
8085 gfc_error ("Binding at %C must have the same access as already"
8086 " defined binding '%s'", bind_name
);
8092 tb
= gfc_get_typebound_proc (NULL
);
8093 tb
->where
= gfc_current_locus
;
8094 tb
->access
= tbattr
.access
;
8096 tb
->u
.generic
= NULL
;
8100 case INTERFACE_GENERIC
:
8101 case INTERFACE_USER_OP
:
8103 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8106 st
= gfc_new_symtree (is_op
? &ns
->tb_uop_root
: &ns
->tb_sym_root
,
8114 case INTERFACE_INTRINSIC_OP
:
8123 /* Now, match all following names as specific targets. */
8126 gfc_symtree
* target_st
;
8127 gfc_tbp_generic
* target
;
8129 m
= gfc_match_name (name
);
8130 if (m
== MATCH_ERROR
)
8134 gfc_error ("Expected specific binding name at %C");
8138 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
8140 /* See if this is a duplicate specification. */
8141 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
8142 if (target_st
== target
->specific_st
)
8144 gfc_error ("'%s' already defined as specific binding for the"
8145 " generic '%s' at %C", name
, bind_name
);
8149 target
= gfc_get_tbp_generic ();
8150 target
->specific_st
= target_st
;
8151 target
->specific
= NULL
;
8152 target
->next
= tb
->u
.generic
;
8153 tb
->u
.generic
= target
;
8155 while (gfc_match (" ,") == MATCH_YES
);
8157 /* Here should be the end. */
8158 if (gfc_match_eos () != MATCH_YES
)
8160 gfc_error ("Junk after GENERIC binding at %C");
8171 /* Match a FINAL declaration inside a derived type. */
8174 gfc_match_final_decl (void)
8176 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8179 gfc_namespace
* module_ns
;
8183 if (gfc_current_form
== FORM_FREE
)
8185 char c
= gfc_peek_ascii_char ();
8186 if (!gfc_is_whitespace (c
) && c
!= ':')
8190 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
8192 if (gfc_current_form
== FORM_FIXED
)
8195 gfc_error ("FINAL declaration at %C must be inside a derived type "
8196 "CONTAINS section");
8200 block
= gfc_state_stack
->previous
->sym
;
8203 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
8204 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
8206 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8207 " specification part of a MODULE");
8211 module_ns
= gfc_current_ns
;
8212 gcc_assert (module_ns
);
8213 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
8215 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8216 if (gfc_match (" ::") == MATCH_ERROR
)
8219 /* Match the sequence of procedure names. */
8226 if (first
&& gfc_match_eos () == MATCH_YES
)
8228 gfc_error ("Empty FINAL at %C");
8232 m
= gfc_match_name (name
);
8235 gfc_error ("Expected module procedure name at %C");
8238 else if (m
!= MATCH_YES
)
8241 if (gfc_match_eos () == MATCH_YES
)
8243 if (!last
&& gfc_match_char (',') != MATCH_YES
)
8245 gfc_error ("Expected ',' at %C");
8249 if (gfc_get_symbol (name
, module_ns
, &sym
))
8251 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
8255 /* Mark the symbol as module procedure. */
8256 if (sym
->attr
.proc
!= PROC_MODULE
8257 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
8258 sym
->name
, NULL
) == FAILURE
)
8261 /* Check if we already have this symbol in the list, this is an error. */
8262 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
8263 if (f
->proc_sym
== sym
)
8265 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8270 /* Add this symbol to the list of finalizers. */
8271 gcc_assert (block
->f2k_derived
);
8273 f
= XCNEW (gfc_finalizer
);
8275 f
->proc_tree
= NULL
;
8276 f
->where
= gfc_current_locus
;
8277 f
->next
= block
->f2k_derived
->finalizers
;
8278 block
->f2k_derived
->finalizers
= f
;
8288 const ext_attr_t ext_attr_list
[] = {
8289 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
8290 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
8291 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
8292 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
8293 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
8294 { NULL
, EXT_ATTR_LAST
, NULL
}
8297 /* Match a !GCC$ ATTRIBUTES statement of the form:
8298 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8299 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8301 TODO: We should support all GCC attributes using the same syntax for
8302 the attribute list, i.e. the list in C
8303 __attributes(( attribute-list ))
8305 !GCC$ ATTRIBUTES attribute-list ::
8306 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8309 As there is absolutely no risk of confusion, we should never return
8312 gfc_match_gcc_attributes (void)
8314 symbol_attribute attr
;
8315 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8320 gfc_clear_attr (&attr
);
8325 if (gfc_match_name (name
) != MATCH_YES
)
8328 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
8329 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
8332 if (id
== EXT_ATTR_LAST
)
8334 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8338 if (gfc_add_ext_attribute (&attr
, (ext_attr_id_t
) id
, &gfc_current_locus
)
8342 gfc_gobble_whitespace ();
8343 ch
= gfc_next_ascii_char ();
8346 /* This is the successful exit condition for the loop. */
8347 if (gfc_next_ascii_char () == ':')
8357 if (gfc_match_eos () == MATCH_YES
)
8362 m
= gfc_match_name (name
);
8366 if (find_special (name
, &sym
, true))
8369 sym
->attr
.ext_attr
|= attr
.ext_attr
;
8371 if (gfc_match_eos () == MATCH_YES
)
8374 if (gfc_match_char (',') != MATCH_YES
)
8381 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");