1 /* Declaration statement matcher
2 Copyright (C) 2002-2015 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
28 #include "constructor.h"
31 #include "stringpool.h"
33 /* Macros to access allocate memory for gfc_data_variable,
34 gfc_data_value and gfc_data. */
35 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
36 #define gfc_get_data_value() XCNEW (gfc_data_value)
37 #define gfc_get_data() XCNEW (gfc_data)
40 static bool set_binding_label (const char **, const char *, int);
43 /* This flag is set if an old-style length selector is matched
44 during a type-declaration statement. */
46 static int old_char_selector
;
48 /* When variables acquire types and attributes from a declaration
49 statement, they get them from the following static variables. The
50 first part of a declaration sets these variables and the second
51 part copies these into symbol structures. */
53 static gfc_typespec current_ts
;
55 static symbol_attribute current_attr
;
56 static gfc_array_spec
*current_as
;
57 static int colon_seen
;
59 /* The current binding label (if any). */
60 static const char* curr_binding_label
;
61 /* Need to know how many identifiers are on the current data declaration
62 line in case we're given the BIND(C) attribute with a NAME= specifier. */
63 static int num_idents_on_line
;
64 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
65 can supply a name if the curr_binding_label is nil and NAME= was not. */
66 static int has_name_equals
= 0;
68 /* Initializer of the previous enumerator. */
70 static gfc_expr
*last_initializer
;
72 /* History of all the enumerators is maintained, so that
73 kind values of all the enumerators could be updated depending
74 upon the maximum initialized value. */
76 typedef struct enumerator_history
79 gfc_expr
*initializer
;
80 struct enumerator_history
*next
;
84 /* Header of enum history chain. */
86 static enumerator_history
*enum_history
= NULL
;
88 /* Pointer of enum history node containing largest initializer. */
90 static enumerator_history
*max_enum
= NULL
;
92 /* gfc_new_block points to the symbol of a newly matched block. */
94 gfc_symbol
*gfc_new_block
;
96 bool gfc_matching_function
;
99 /********************* DATA statement subroutines *********************/
101 static bool in_match_data
= false;
104 gfc_in_match_data (void)
106 return in_match_data
;
110 set_in_match_data (bool set_value
)
112 in_match_data
= set_value
;
115 /* Free a gfc_data_variable structure and everything beneath it. */
118 free_variable (gfc_data_variable
*p
)
120 gfc_data_variable
*q
;
125 gfc_free_expr (p
->expr
);
126 gfc_free_iterator (&p
->iter
, 0);
127 free_variable (p
->list
);
133 /* Free a gfc_data_value structure and everything beneath it. */
136 free_value (gfc_data_value
*p
)
143 mpz_clear (p
->repeat
);
144 gfc_free_expr (p
->expr
);
150 /* Free a list of gfc_data structures. */
153 gfc_free_data (gfc_data
*p
)
160 free_variable (p
->var
);
161 free_value (p
->value
);
167 /* Free all data in a namespace. */
170 gfc_free_data_all (gfc_namespace
*ns
)
182 /* Reject data parsed since the last restore point was marked. */
185 gfc_reject_data (gfc_namespace
*ns
)
189 while (ns
->data
&& ns
->data
!= ns
->old_data
)
197 static match
var_element (gfc_data_variable
*);
199 /* Match a list of variables terminated by an iterator and a right
203 var_list (gfc_data_variable
*parent
)
205 gfc_data_variable
*tail
, var
;
208 m
= var_element (&var
);
209 if (m
== MATCH_ERROR
)
214 tail
= gfc_get_data_variable ();
221 if (gfc_match_char (',') != MATCH_YES
)
224 m
= gfc_match_iterator (&parent
->iter
, 1);
227 if (m
== MATCH_ERROR
)
230 m
= var_element (&var
);
231 if (m
== MATCH_ERROR
)
236 tail
->next
= gfc_get_data_variable ();
242 if (gfc_match_char (')') != MATCH_YES
)
247 gfc_syntax_error (ST_DATA
);
252 /* Match a single element in a data variable list, which can be a
253 variable-iterator list. */
256 var_element (gfc_data_variable
*new_var
)
261 memset (new_var
, 0, sizeof (gfc_data_variable
));
263 if (gfc_match_char ('(') == MATCH_YES
)
264 return var_list (new_var
);
266 m
= gfc_match_variable (&new_var
->expr
, 0);
270 sym
= new_var
->expr
->symtree
->n
.sym
;
272 /* Symbol should already have an associated type. */
273 if (!gfc_check_symbol_typed (sym
, gfc_current_ns
, false, gfc_current_locus
))
276 if (!sym
->attr
.function
&& gfc_current_ns
->parent
277 && gfc_current_ns
->parent
== sym
->ns
)
279 gfc_error ("Host associated variable %qs may not be in the DATA "
280 "statement at %C", sym
->name
);
284 if (gfc_current_state () != COMP_BLOCK_DATA
285 && sym
->attr
.in_common
286 && !gfc_notify_std (GFC_STD_GNU
, "initialization of "
287 "common block variable %qs in DATA statement at %C",
291 if (!gfc_add_data (&sym
->attr
, sym
->name
, &new_var
->expr
->where
))
298 /* Match the top-level list of data variables. */
301 top_var_list (gfc_data
*d
)
303 gfc_data_variable var
, *tail
, *new_var
;
310 m
= var_element (&var
);
313 if (m
== MATCH_ERROR
)
316 new_var
= gfc_get_data_variable ();
322 tail
->next
= new_var
;
326 if (gfc_match_char ('/') == MATCH_YES
)
328 if (gfc_match_char (',') != MATCH_YES
)
335 gfc_syntax_error (ST_DATA
);
336 gfc_free_data_all (gfc_current_ns
);
342 match_data_constant (gfc_expr
**result
)
344 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
345 gfc_symbol
*sym
, *dt_sym
= NULL
;
350 m
= gfc_match_literal_constant (&expr
, 1);
357 if (m
== MATCH_ERROR
)
360 m
= gfc_match_null (result
);
364 old_loc
= gfc_current_locus
;
366 /* Should this be a structure component, try to match it
367 before matching a name. */
368 m
= gfc_match_rvalue (result
);
369 if (m
== MATCH_ERROR
)
372 if (m
== MATCH_YES
&& (*result
)->expr_type
== EXPR_STRUCTURE
)
374 if (!gfc_simplify_expr (*result
, 0))
378 else if (m
== MATCH_YES
)
379 gfc_free_expr (*result
);
381 gfc_current_locus
= old_loc
;
383 m
= gfc_match_name (name
);
387 if (gfc_find_symbol (name
, NULL
, 1, &sym
))
390 if (sym
&& sym
->attr
.generic
)
391 dt_sym
= gfc_find_dt_in_generic (sym
);
394 || (sym
->attr
.flavor
!= FL_PARAMETER
395 && (!dt_sym
|| dt_sym
->attr
.flavor
!= FL_DERIVED
)))
397 gfc_error ("Symbol %qs must be a PARAMETER in DATA statement at %C",
401 else if (dt_sym
&& dt_sym
->attr
.flavor
== FL_DERIVED
)
402 return gfc_match_structure_constructor (dt_sym
, result
);
404 /* Check to see if the value is an initialization array expression. */
405 if (sym
->value
->expr_type
== EXPR_ARRAY
)
407 gfc_current_locus
= old_loc
;
409 m
= gfc_match_init_expr (result
);
410 if (m
== MATCH_ERROR
)
415 if (!gfc_simplify_expr (*result
, 0))
418 if ((*result
)->expr_type
== EXPR_CONSTANT
)
422 gfc_error ("Invalid initializer %s in Data statement at %C", name
);
428 *result
= gfc_copy_expr (sym
->value
);
433 /* Match a list of values in a DATA statement. The leading '/' has
434 already been seen at this point. */
437 top_val_list (gfc_data
*data
)
439 gfc_data_value
*new_val
, *tail
;
447 m
= match_data_constant (&expr
);
450 if (m
== MATCH_ERROR
)
453 new_val
= gfc_get_data_value ();
454 mpz_init (new_val
->repeat
);
457 data
->value
= new_val
;
459 tail
->next
= new_val
;
463 if (expr
->ts
.type
!= BT_INTEGER
|| gfc_match_char ('*') != MATCH_YES
)
466 mpz_set_ui (tail
->repeat
, 1);
470 mpz_set (tail
->repeat
, expr
->value
.integer
);
471 gfc_free_expr (expr
);
473 m
= match_data_constant (&tail
->expr
);
476 if (m
== MATCH_ERROR
)
480 if (gfc_match_char ('/') == MATCH_YES
)
482 if (gfc_match_char (',') == MATCH_NO
)
489 gfc_syntax_error (ST_DATA
);
490 gfc_free_data_all (gfc_current_ns
);
495 /* Matches an old style initialization. */
498 match_old_style_init (const char *name
)
505 /* Set up data structure to hold initializers. */
506 gfc_find_sym_tree (name
, NULL
, 0, &st
);
509 newdata
= gfc_get_data ();
510 newdata
->var
= gfc_get_data_variable ();
511 newdata
->var
->expr
= gfc_get_variable_expr (st
);
512 newdata
->where
= gfc_current_locus
;
514 /* Match initial value list. This also eats the terminal '/'. */
515 m
= top_val_list (newdata
);
524 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
528 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
530 /* Mark the variable as having appeared in a data statement. */
531 if (!gfc_add_data (&sym
->attr
, sym
->name
, &sym
->declared_at
))
537 /* Chain in namespace list of DATA initializers. */
538 newdata
->next
= gfc_current_ns
->data
;
539 gfc_current_ns
->data
= newdata
;
545 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
546 we are matching a DATA statement and are therefore issuing an error
547 if we encounter something unexpected, if not, we're trying to match
548 an old-style initialization expression of the form INTEGER I /2/. */
551 gfc_match_data (void)
556 set_in_match_data (true);
560 new_data
= gfc_get_data ();
561 new_data
->where
= gfc_current_locus
;
563 m
= top_var_list (new_data
);
567 m
= top_val_list (new_data
);
571 new_data
->next
= gfc_current_ns
->data
;
572 gfc_current_ns
->data
= new_data
;
574 if (gfc_match_eos () == MATCH_YES
)
577 gfc_match_char (','); /* Optional comma */
580 set_in_match_data (false);
584 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
587 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
592 set_in_match_data (false);
593 gfc_free_data (new_data
);
598 /************************ Declaration statements *********************/
601 /* Auxiliary function to merge DIMENSION and CODIMENSION array specs. */
604 merge_array_spec (gfc_array_spec
*from
, gfc_array_spec
*to
, bool copy
)
608 if ((from
->type
== AS_ASSUMED_RANK
&& to
->corank
)
609 || (to
->type
== AS_ASSUMED_RANK
&& from
->corank
))
611 gfc_error ("The assumed-rank array at %C shall not have a codimension");
615 if (to
->rank
== 0 && from
->rank
> 0)
617 to
->rank
= from
->rank
;
618 to
->type
= from
->type
;
619 to
->cray_pointee
= from
->cray_pointee
;
620 to
->cp_was_assumed
= from
->cp_was_assumed
;
622 for (i
= 0; i
< to
->corank
; i
++)
624 to
->lower
[from
->rank
+ i
] = to
->lower
[i
];
625 to
->upper
[from
->rank
+ i
] = to
->upper
[i
];
627 for (i
= 0; i
< from
->rank
; i
++)
631 to
->lower
[i
] = gfc_copy_expr (from
->lower
[i
]);
632 to
->upper
[i
] = gfc_copy_expr (from
->upper
[i
]);
636 to
->lower
[i
] = from
->lower
[i
];
637 to
->upper
[i
] = from
->upper
[i
];
641 else if (to
->corank
== 0 && from
->corank
> 0)
643 to
->corank
= from
->corank
;
644 to
->cotype
= from
->cotype
;
646 for (i
= 0; i
< from
->corank
; i
++)
650 to
->lower
[to
->rank
+ i
] = gfc_copy_expr (from
->lower
[i
]);
651 to
->upper
[to
->rank
+ i
] = gfc_copy_expr (from
->upper
[i
]);
655 to
->lower
[to
->rank
+ i
] = from
->lower
[i
];
656 to
->upper
[to
->rank
+ i
] = from
->upper
[i
];
665 /* Match an intent specification. Since this can only happen after an
666 INTENT word, a legal intent-spec must follow. */
669 match_intent_spec (void)
672 if (gfc_match (" ( in out )") == MATCH_YES
)
674 if (gfc_match (" ( in )") == MATCH_YES
)
676 if (gfc_match (" ( out )") == MATCH_YES
)
679 gfc_error ("Bad INTENT specification at %C");
680 return INTENT_UNKNOWN
;
684 /* Matches a character length specification, which is either a
685 specification expression, '*', or ':'. */
688 char_len_param_value (gfc_expr
**expr
, bool *deferred
)
695 if (gfc_match_char ('*') == MATCH_YES
)
698 if (gfc_match_char (':') == MATCH_YES
)
700 if (!gfc_notify_std (GFC_STD_F2003
, "deferred type parameter at %C"))
708 m
= gfc_match_expr (expr
);
710 if (m
== MATCH_NO
|| m
== MATCH_ERROR
)
713 if (!gfc_expr_check_typed (*expr
, gfc_current_ns
, false))
716 if ((*expr
)->expr_type
== EXPR_FUNCTION
)
718 if ((*expr
)->ts
.type
== BT_INTEGER
719 || ((*expr
)->ts
.type
== BT_UNKNOWN
720 && strcmp((*expr
)->symtree
->name
, "null") != 0))
725 else if ((*expr
)->expr_type
== EXPR_CONSTANT
)
727 /* F2008, 4.4.3.1: The length is a type parameter; its kind is
728 processor dependent and its value is greater than or equal to zero.
729 F2008, 4.4.3.2: If the character length parameter value evaluates
730 to a negative value, the length of character entities declared
733 if ((*expr
)->ts
.type
== BT_INTEGER
)
735 if (mpz_cmp_si ((*expr
)->value
.integer
, 0) < 0)
736 mpz_set_si ((*expr
)->value
.integer
, 0);
741 else if ((*expr
)->expr_type
== EXPR_ARRAY
)
743 else if ((*expr
)->expr_type
== EXPR_VARIABLE
)
747 e
= gfc_copy_expr (*expr
);
749 /* This catches the invalid code "[character(m(2:3)) :: 'x', 'y']",
750 which causes an ICE if gfc_reduce_init_expr() is called. */
751 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
752 && e
->ref
->u
.ar
.type
== AR_UNKNOWN
753 && e
->ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
)
756 gfc_reduce_init_expr (e
);
758 if ((e
->ref
&& e
->ref
->type
== REF_ARRAY
759 && e
->ref
->u
.ar
.type
!= AR_ELEMENT
)
760 || (!e
->ref
&& e
->expr_type
== EXPR_ARRAY
))
772 gfc_error ("Scalar INTEGER expression expected at %L", &(*expr
)->where
);
777 /* A character length is a '*' followed by a literal integer or a
778 char_len_param_value in parenthesis. */
781 match_char_length (gfc_expr
**expr
, bool *deferred
, bool obsolescent_check
)
787 m
= gfc_match_char ('*');
791 m
= gfc_match_small_literal_int (&length
, NULL
);
792 if (m
== MATCH_ERROR
)
797 if (obsolescent_check
798 && !gfc_notify_std (GFC_STD_F95_OBS
, "Old-style character length at %C"))
800 *expr
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, length
);
804 if (gfc_match_char ('(') == MATCH_NO
)
807 m
= char_len_param_value (expr
, deferred
);
808 if (m
!= MATCH_YES
&& gfc_matching_function
)
814 if (m
== MATCH_ERROR
)
819 if (gfc_match_char (')') == MATCH_NO
)
821 gfc_free_expr (*expr
);
829 gfc_error ("Syntax error in character length specification at %C");
834 /* Special subroutine for finding a symbol. Check if the name is found
835 in the current name space. If not, and we're compiling a function or
836 subroutine and the parent compilation unit is an interface, then check
837 to see if the name we've been given is the name of the interface
838 (located in another namespace). */
841 find_special (const char *name
, gfc_symbol
**result
, bool allow_subroutine
)
847 i
= gfc_get_sym_tree (name
, NULL
, &st
, allow_subroutine
);
850 *result
= st
? st
->n
.sym
: NULL
;
854 if (gfc_current_state () != COMP_SUBROUTINE
855 && gfc_current_state () != COMP_FUNCTION
)
858 s
= gfc_state_stack
->previous
;
862 if (s
->state
!= COMP_INTERFACE
)
865 goto end
; /* Nameless interface. */
867 if (strcmp (name
, s
->sym
->name
) == 0)
878 /* Special subroutine for getting a symbol node associated with a
879 procedure name, used in SUBROUTINE and FUNCTION statements. The
880 symbol is created in the parent using with symtree node in the
881 child unit pointing to the symbol. If the current namespace has no
882 parent, then the symbol is just created in the current unit. */
885 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
891 /* Module functions have to be left in their own namespace because
892 they have potentially (almost certainly!) already been referenced.
893 In this sense, they are rather like external functions. This is
894 fixed up in resolve.c(resolve_entries), where the symbol name-
895 space is set to point to the master function, so that the fake
896 result mechanism can work. */
897 if (module_fcn_entry
)
899 /* Present if entry is declared to be a module procedure. */
900 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
903 rc
= gfc_get_symbol (name
, NULL
, result
);
904 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
905 && (*result
)->ts
.type
== BT_UNKNOWN
906 && sym
->attr
.flavor
== FL_UNKNOWN
)
907 /* Pick up the typespec for the entry, if declared in the function
908 body. Note that this symbol is FL_UNKNOWN because it will
909 only have appeared in a type declaration. The local symtree
910 is set to point to the module symbol and a unique symtree
911 to the local version. This latter ensures a correct clearing
914 /* If the ENTRY proceeds its specification, we need to ensure
915 that this does not raise a "has no IMPLICIT type" error. */
916 if (sym
->ts
.type
== BT_UNKNOWN
)
917 sym
->attr
.untyped
= 1;
919 (*result
)->ts
= sym
->ts
;
921 /* Put the symbol in the procedure namespace so that, should
922 the ENTRY precede its specification, the specification
924 (*result
)->ns
= gfc_current_ns
;
926 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
928 st
= gfc_get_unique_symtree (gfc_current_ns
);
933 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
939 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
942 if (sym
->attr
.module_procedure
943 && sym
->attr
.if_source
== IFSRC_IFBODY
)
945 /* Create a partially populated interface symbol to carry the
946 characteristics of the procedure and the result. */
947 sym
->ts
.interface
= gfc_new_symbol (name
, sym
->ns
);
948 gfc_add_type (sym
->ts
.interface
, &(sym
->ts
),
950 gfc_copy_attr (&sym
->ts
.interface
->attr
, &sym
->attr
, NULL
);
951 if (sym
->attr
.dimension
)
952 sym
->ts
.interface
->as
= gfc_copy_array_spec (sym
->as
);
954 /* Ideally, at this point, a copy would be made of the formal
955 arguments and their namespace. However, this does not appear
956 to be necessary, albeit at the expense of not being able to
957 use gfc_compare_interfaces directly. */
959 if (sym
->result
&& sym
->result
!= sym
)
961 sym
->ts
.interface
->result
= sym
->result
;
964 else if (sym
->result
)
966 sym
->ts
.interface
->result
= sym
->ts
.interface
;
969 else if (sym
&& !sym
->gfc_new
970 && gfc_current_state () != COMP_INTERFACE
)
972 /* Trap another encompassed procedure with the same name. All
973 these conditions are necessary to avoid picking up an entry
974 whose name clashes with that of the encompassing procedure;
975 this is handled using gsymbols to register unique,globally
977 if (sym
->attr
.flavor
!= 0
978 && sym
->attr
.proc
!= 0
979 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
980 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
981 gfc_error_now ("Procedure %qs at %C is already defined at %L",
982 name
, &sym
->declared_at
);
984 /* Trap a procedure with a name the same as interface in the
985 encompassing scope. */
986 if (sym
->attr
.generic
!= 0
987 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
988 && !sym
->attr
.mod_proc
)
989 gfc_error_now ("Name %qs at %C is already defined"
990 " as a generic interface at %L",
991 name
, &sym
->declared_at
);
993 /* Trap declarations of attributes in encompassing scope. The
994 signature for this is that ts.kind is set. Legitimate
995 references only set ts.type. */
996 if (sym
->ts
.kind
!= 0
997 && !sym
->attr
.implicit_type
998 && sym
->attr
.proc
== 0
999 && gfc_current_ns
->parent
!= NULL
1000 && sym
->attr
.access
== 0
1001 && !module_fcn_entry
)
1002 gfc_error_now ("Procedure %qs at %C has an explicit interface "
1003 "and must not have attributes declared at %L",
1004 name
, &sym
->declared_at
);
1007 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
1010 /* Module function entries will already have a symtree in
1011 the current namespace but will need one at module level. */
1012 if (module_fcn_entry
)
1014 /* Present if entry is declared to be a module procedure. */
1015 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
1017 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
1020 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
1025 /* See if the procedure should be a module procedure. */
1027 if (((sym
->ns
->proc_name
!= NULL
1028 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
1029 && sym
->attr
.proc
!= PROC_MODULE
)
1030 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
1031 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
1038 /* Verify that the given symbol representing a parameter is C
1039 interoperable, by checking to see if it was marked as such after
1040 its declaration. If the given symbol is not interoperable, a
1041 warning is reported, thus removing the need to return the status to
1042 the calling function. The standard does not require the user use
1043 one of the iso_c_binding named constants to declare an
1044 interoperable parameter, but we can't be sure if the param is C
1045 interop or not if the user doesn't. For example, integer(4) may be
1046 legal Fortran, but doesn't have meaning in C. It may interop with
1047 a number of the C types, which causes a problem because the
1048 compiler can't know which one. This code is almost certainly not
1049 portable, and the user will get what they deserve if the C type
1050 across platforms isn't always interoperable with integer(4). If
1051 the user had used something like integer(c_int) or integer(c_long),
1052 the compiler could have automatically handled the varying sizes
1053 across platforms. */
1056 gfc_verify_c_interop_param (gfc_symbol
*sym
)
1058 int is_c_interop
= 0;
1061 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
1062 Don't repeat the checks here. */
1063 if (sym
->attr
.implicit_type
)
1066 /* For subroutines or functions that are passed to a BIND(C) procedure,
1067 they're interoperable if they're BIND(C) and their params are all
1069 if (sym
->attr
.flavor
== FL_PROCEDURE
)
1071 if (sym
->attr
.is_bind_c
== 0)
1073 gfc_error_now ("Procedure %qs at %L must have the BIND(C) "
1074 "attribute to be C interoperable", sym
->name
,
1075 &(sym
->declared_at
));
1080 if (sym
->attr
.is_c_interop
== 1)
1081 /* We've already checked this procedure; don't check it again. */
1084 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
1089 /* See if we've stored a reference to a procedure that owns sym. */
1090 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
1092 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
1094 is_c_interop
= (gfc_verify_c_interop(&(sym
->ts
)) ? 1 : 0);
1096 if (is_c_interop
!= 1)
1098 /* Make personalized messages to give better feedback. */
1099 if (sym
->ts
.type
== BT_DERIVED
)
1100 gfc_error ("Variable %qs at %L is a dummy argument to the "
1101 "BIND(C) procedure %qs but is not C interoperable "
1102 "because derived type %qs is not C interoperable",
1103 sym
->name
, &(sym
->declared_at
),
1104 sym
->ns
->proc_name
->name
,
1105 sym
->ts
.u
.derived
->name
);
1106 else if (sym
->ts
.type
== BT_CLASS
)
1107 gfc_error ("Variable %qs at %L is a dummy argument to the "
1108 "BIND(C) procedure %qs but is not C interoperable "
1109 "because it is polymorphic",
1110 sym
->name
, &(sym
->declared_at
),
1111 sym
->ns
->proc_name
->name
);
1112 else if (warn_c_binding_type
)
1113 gfc_warning (OPT_Wc_binding_type
,
1114 "Variable %qs at %L is a dummy argument of the "
1115 "BIND(C) procedure %qs but may not be C "
1117 sym
->name
, &(sym
->declared_at
),
1118 sym
->ns
->proc_name
->name
);
1121 /* Character strings are only C interoperable if they have a
1123 if (sym
->ts
.type
== BT_CHARACTER
)
1125 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
1126 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
1127 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
1129 gfc_error ("Character argument %qs at %L "
1130 "must be length 1 because "
1131 "procedure %qs is BIND(C)",
1132 sym
->name
, &sym
->declared_at
,
1133 sym
->ns
->proc_name
->name
);
1138 /* We have to make sure that any param to a bind(c) routine does
1139 not have the allocatable, pointer, or optional attributes,
1140 according to J3/04-007, section 5.1. */
1141 if (sym
->attr
.allocatable
== 1
1142 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable %qs at %L with "
1143 "ALLOCATABLE attribute in procedure %qs "
1144 "with BIND(C)", sym
->name
,
1145 &(sym
->declared_at
),
1146 sym
->ns
->proc_name
->name
))
1149 if (sym
->attr
.pointer
== 1
1150 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable %qs at %L with "
1151 "POINTER attribute in procedure %qs "
1152 "with BIND(C)", sym
->name
,
1153 &(sym
->declared_at
),
1154 sym
->ns
->proc_name
->name
))
1157 if ((sym
->attr
.allocatable
|| sym
->attr
.pointer
) && !sym
->as
)
1159 gfc_error ("Scalar variable %qs at %L with POINTER or "
1160 "ALLOCATABLE in procedure %qs with BIND(C) is not yet"
1161 " supported", sym
->name
, &(sym
->declared_at
),
1162 sym
->ns
->proc_name
->name
);
1166 if (sym
->attr
.optional
== 1 && sym
->attr
.value
)
1168 gfc_error ("Variable %qs at %L cannot have both the OPTIONAL "
1169 "and the VALUE attribute because procedure %qs "
1170 "is BIND(C)", sym
->name
, &(sym
->declared_at
),
1171 sym
->ns
->proc_name
->name
);
1174 else if (sym
->attr
.optional
== 1
1175 && !gfc_notify_std (GFC_STD_F2008_TS
, "Variable %qs "
1176 "at %L with OPTIONAL attribute in "
1177 "procedure %qs which is BIND(C)",
1178 sym
->name
, &(sym
->declared_at
),
1179 sym
->ns
->proc_name
->name
))
1182 /* Make sure that if it has the dimension attribute, that it is
1183 either assumed size or explicit shape. Deferred shape is already
1184 covered by the pointer/allocatable attribute. */
1185 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SHAPE
1186 && !gfc_notify_std (GFC_STD_F2008_TS
, "Assumed-shape array %qs "
1187 "at %L as dummy argument to the BIND(C) "
1188 "procedure '%s' at %L", sym
->name
,
1189 &(sym
->declared_at
),
1190 sym
->ns
->proc_name
->name
,
1191 &(sym
->ns
->proc_name
->declared_at
)))
1201 /* Function called by variable_decl() that adds a name to the symbol table. */
1204 build_sym (const char *name
, gfc_charlen
*cl
, bool cl_deferred
,
1205 gfc_array_spec
**as
, locus
*var_locus
)
1207 symbol_attribute attr
;
1210 if (gfc_get_symbol (name
, NULL
, &sym
))
1213 /* Start updating the symbol table. Add basic type attribute if present. */
1214 if (current_ts
.type
!= BT_UNKNOWN
1215 && (sym
->attr
.implicit_type
== 0
1216 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1217 && !gfc_add_type (sym
, ¤t_ts
, var_locus
))
1220 if (sym
->ts
.type
== BT_CHARACTER
)
1223 sym
->ts
.deferred
= cl_deferred
;
1226 /* Add dimension attribute if present. */
1227 if (!gfc_set_array_spec (sym
, *as
, var_locus
))
1231 /* Add attribute to symbol. The copy is so that we can reset the
1232 dimension attribute. */
1233 attr
= current_attr
;
1235 attr
.codimension
= 0;
1237 if (!gfc_copy_attr (&sym
->attr
, &attr
, var_locus
))
1240 /* Finish any work that may need to be done for the binding label,
1241 if it's a bind(c). The bind(c) attr is found before the symbol
1242 is made, and before the symbol name (for data decls), so the
1243 current_ts is holding the binding label, or nothing if the
1244 name= attr wasn't given. Therefore, test here if we're dealing
1245 with a bind(c) and make sure the binding label is set correctly. */
1246 if (sym
->attr
.is_bind_c
== 1)
1248 if (!sym
->binding_label
)
1250 /* Set the binding label and verify that if a NAME= was specified
1251 then only one identifier was in the entity-decl-list. */
1252 if (!set_binding_label (&sym
->binding_label
, sym
->name
,
1253 num_idents_on_line
))
1258 /* See if we know we're in a common block, and if it's a bind(c)
1259 common then we need to make sure we're an interoperable type. */
1260 if (sym
->attr
.in_common
== 1)
1262 /* Test the common block object. */
1263 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1264 && sym
->ts
.is_c_interop
!= 1)
1266 gfc_error_now ("Variable %qs in common block %qs at %C "
1267 "must be declared with a C interoperable "
1268 "kind since common block %qs is BIND(C)",
1269 sym
->name
, sym
->common_block
->name
,
1270 sym
->common_block
->name
);
1275 sym
->attr
.implied_index
= 0;
1277 if (sym
->ts
.type
== BT_CLASS
)
1278 return gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
);
1284 /* Set character constant to the given length. The constant will be padded or
1285 truncated. If we're inside an array constructor without a typespec, we
1286 additionally check that all elements have the same length; check_len -1
1287 means no checking. */
1290 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1295 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1296 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1298 slen
= expr
->value
.character
.length
;
1301 s
= gfc_get_wide_string (len
+ 1);
1302 memcpy (s
, expr
->value
.character
.string
,
1303 MIN (len
, slen
) * sizeof (gfc_char_t
));
1305 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1307 if (warn_character_truncation
&& slen
> len
)
1308 gfc_warning_now (OPT_Wcharacter_truncation
,
1309 "CHARACTER expression at %L is being truncated "
1310 "(%d/%d)", &expr
->where
, slen
, len
);
1312 /* Apply the standard by 'hand' otherwise it gets cleared for
1314 if (check_len
!= -1 && slen
!= check_len
1315 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1316 gfc_error_now ("The CHARACTER elements of the array constructor "
1317 "at %L must have the same length (%d/%d)",
1318 &expr
->where
, slen
, check_len
);
1321 free (expr
->value
.character
.string
);
1322 expr
->value
.character
.string
= s
;
1323 expr
->value
.character
.length
= len
;
1328 /* Function to create and update the enumerator history
1329 using the information passed as arguments.
1330 Pointer "max_enum" is also updated, to point to
1331 enum history node containing largest initializer.
1333 SYM points to the symbol node of enumerator.
1334 INIT points to its enumerator value. */
1337 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1339 enumerator_history
*new_enum_history
;
1340 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1342 new_enum_history
= XCNEW (enumerator_history
);
1344 new_enum_history
->sym
= sym
;
1345 new_enum_history
->initializer
= init
;
1346 new_enum_history
->next
= NULL
;
1348 if (enum_history
== NULL
)
1350 enum_history
= new_enum_history
;
1351 max_enum
= enum_history
;
1355 new_enum_history
->next
= enum_history
;
1356 enum_history
= new_enum_history
;
1358 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1359 new_enum_history
->initializer
->value
.integer
) < 0)
1360 max_enum
= new_enum_history
;
1365 /* Function to free enum kind history. */
1368 gfc_free_enum_history (void)
1370 enumerator_history
*current
= enum_history
;
1371 enumerator_history
*next
;
1373 while (current
!= NULL
)
1375 next
= current
->next
;
1380 enum_history
= NULL
;
1384 /* Function called by variable_decl() that adds an initialization
1385 expression to a symbol. */
1388 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1390 symbol_attribute attr
;
1395 if (find_special (name
, &sym
, false))
1400 /* If this symbol is confirming an implicit parameter type,
1401 then an initialization expression is not allowed. */
1402 if (attr
.flavor
== FL_PARAMETER
1403 && sym
->value
!= NULL
1406 gfc_error ("Initializer not allowed for PARAMETER %qs at %C",
1413 /* An initializer is required for PARAMETER declarations. */
1414 if (attr
.flavor
== FL_PARAMETER
)
1416 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1422 /* If a variable appears in a DATA block, it cannot have an
1426 gfc_error ("Variable %qs at %C with an initializer already "
1427 "appears in a DATA statement", sym
->name
);
1431 /* Check if the assignment can happen. This has to be put off
1432 until later for derived type variables and procedure pointers. */
1433 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1434 && sym
->ts
.type
!= BT_CLASS
&& init
->ts
.type
!= BT_CLASS
1435 && !sym
->attr
.proc_pointer
1436 && !gfc_check_assign_symbol (sym
, NULL
, init
))
1439 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.u
.cl
1440 && init
->ts
.type
== BT_CHARACTER
)
1442 /* Update symbol character length according initializer. */
1443 if (!gfc_check_assign_symbol (sym
, NULL
, init
))
1446 if (sym
->ts
.u
.cl
->length
== NULL
)
1449 /* If there are multiple CHARACTER variables declared on the
1450 same line, we don't want them to share the same length. */
1451 sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1453 if (sym
->attr
.flavor
== FL_PARAMETER
)
1455 if (init
->expr_type
== EXPR_CONSTANT
)
1457 clen
= init
->value
.character
.length
;
1458 sym
->ts
.u
.cl
->length
1459 = gfc_get_int_expr (gfc_default_integer_kind
,
1462 else if (init
->expr_type
== EXPR_ARRAY
)
1464 clen
= mpz_get_si (init
->ts
.u
.cl
->length
->value
.integer
);
1465 sym
->ts
.u
.cl
->length
1466 = gfc_get_int_expr (gfc_default_integer_kind
,
1469 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
1470 sym
->ts
.u
.cl
->length
=
1471 gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
1474 /* Update initializer character length according symbol. */
1475 else if (sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1479 if (!gfc_specification_expr (sym
->ts
.u
.cl
->length
))
1482 len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
1484 if (init
->expr_type
== EXPR_CONSTANT
)
1485 gfc_set_constant_character_len (len
, init
, -1);
1486 else if (init
->expr_type
== EXPR_ARRAY
)
1490 /* Build a new charlen to prevent simplification from
1491 deleting the length before it is resolved. */
1492 init
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1493 init
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->ts
.u
.cl
->length
);
1495 for (c
= gfc_constructor_first (init
->value
.constructor
);
1496 c
; c
= gfc_constructor_next (c
))
1497 gfc_set_constant_character_len (len
, c
->expr
, -1);
1502 /* If sym is implied-shape, set its upper bounds from init. */
1503 if (sym
->attr
.flavor
== FL_PARAMETER
&& sym
->attr
.dimension
1504 && sym
->as
->type
== AS_IMPLIED_SHAPE
)
1508 if (init
->rank
== 0)
1510 gfc_error ("Can't initialize implied-shape array at %L"
1511 " with scalar", &sym
->declared_at
);
1515 /* Shape should be present, we get an initialization expression. */
1516 gcc_assert (init
->shape
);
1518 for (dim
= 0; dim
< sym
->as
->rank
; ++dim
)
1524 lower
= sym
->as
->lower
[dim
];
1525 if (lower
->expr_type
!= EXPR_CONSTANT
)
1527 gfc_error ("Non-constant lower bound in implied-shape"
1528 " declaration at %L", &lower
->where
);
1532 /* All dimensions must be without upper bound. */
1533 gcc_assert (!sym
->as
->upper
[dim
]);
1536 e
= gfc_get_constant_expr (BT_INTEGER
, k
, &sym
->declared_at
);
1537 mpz_add (e
->value
.integer
,
1538 lower
->value
.integer
, init
->shape
[dim
]);
1539 mpz_sub_ui (e
->value
.integer
, e
->value
.integer
, 1);
1540 sym
->as
->upper
[dim
] = e
;
1543 sym
->as
->type
= AS_EXPLICIT
;
1546 /* Need to check if the expression we initialized this
1547 to was one of the iso_c_binding named constants. If so,
1548 and we're a parameter (constant), let it be iso_c.
1550 integer(c_int), parameter :: my_int = c_int
1551 integer(my_int) :: my_int_2
1552 If we mark my_int as iso_c (since we can see it's value
1553 is equal to one of the named constants), then my_int_2
1554 will be considered C interoperable. */
1555 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1557 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1558 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1559 /* attr bits needed for module files. */
1560 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1561 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1562 if (init
->ts
.is_iso_c
)
1563 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1566 /* Add initializer. Make sure we keep the ranks sane. */
1567 if (sym
->attr
.dimension
&& init
->rank
== 0)
1572 if (sym
->attr
.flavor
== FL_PARAMETER
1573 && init
->expr_type
== EXPR_CONSTANT
1574 && spec_size (sym
->as
, &size
)
1575 && mpz_cmp_si (size
, 0) > 0)
1577 array
= gfc_get_array_expr (init
->ts
.type
, init
->ts
.kind
,
1579 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1580 gfc_constructor_append_expr (&array
->value
.constructor
,
1583 : gfc_copy_expr (init
),
1586 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1587 for (n
= 0; n
< sym
->as
->rank
; n
++)
1588 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1593 init
->rank
= sym
->as
->rank
;
1597 if (sym
->attr
.save
== SAVE_NONE
)
1598 sym
->attr
.save
= SAVE_IMPLICIT
;
1606 /* Function called by variable_decl() that adds a name to a structure
1610 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1611 gfc_array_spec
**as
)
1616 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1617 constructing, it must have the pointer attribute. */
1618 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
1619 && current_ts
.u
.derived
== gfc_current_block ()
1620 && current_attr
.pointer
== 0)
1622 gfc_error ("Component at %C must have the POINTER attribute");
1626 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1628 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1630 gfc_error ("Array component of structure at %C must have explicit "
1631 "or deferred shape");
1636 if (!gfc_add_component (gfc_current_block(), name
, &c
))
1640 if (c
->ts
.type
== BT_CHARACTER
)
1642 c
->attr
= current_attr
;
1644 c
->initializer
= *init
;
1651 c
->attr
.codimension
= 1;
1653 c
->attr
.dimension
= 1;
1657 /* Should this ever get more complicated, combine with similar section
1658 in add_init_expr_to_sym into a separate function. */
1659 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
1661 && c
->ts
.u
.cl
->length
&& c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1665 gcc_assert (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
);
1666 gcc_assert (c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1667 gcc_assert (c
->ts
.u
.cl
->length
->ts
.type
== BT_INTEGER
);
1669 len
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
1671 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1672 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1673 else if (mpz_cmp (c
->ts
.u
.cl
->length
->value
.integer
,
1674 c
->initializer
->ts
.u
.cl
->length
->value
.integer
))
1676 gfc_constructor
*ctor
;
1677 ctor
= gfc_constructor_first (c
->initializer
->value
.constructor
);
1682 bool has_ts
= (c
->initializer
->ts
.u
.cl
1683 && c
->initializer
->ts
.u
.cl
->length_from_typespec
);
1685 /* Remember the length of the first element for checking
1686 that all elements *in the constructor* have the same
1687 length. This need not be the length of the LHS! */
1688 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1689 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1690 first_len
= ctor
->expr
->value
.character
.length
;
1692 for ( ; ctor
; ctor
= gfc_constructor_next (ctor
))
1693 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1695 gfc_set_constant_character_len (len
, ctor
->expr
,
1696 has_ts
? -1 : first_len
);
1697 ctor
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (c
->ts
.u
.cl
->length
);
1703 /* Check array components. */
1704 if (!c
->attr
.dimension
)
1707 if (c
->attr
.pointer
)
1709 if (c
->as
->type
!= AS_DEFERRED
)
1711 gfc_error ("Pointer array component of structure at %C must have a "
1716 else if (c
->attr
.allocatable
)
1718 if (c
->as
->type
!= AS_DEFERRED
)
1720 gfc_error ("Allocatable component of structure at %C must have a "
1727 if (c
->as
->type
!= AS_EXPLICIT
)
1729 gfc_error ("Array component of structure at %C must have an "
1736 if (c
->ts
.type
== BT_CLASS
)
1738 bool t2
= gfc_build_class_symbol (&c
->ts
, &c
->attr
, &c
->as
);
1748 /* Match a 'NULL()', and possibly take care of some side effects. */
1751 gfc_match_null (gfc_expr
**result
)
1754 match m
, m2
= MATCH_NO
;
1756 if ((m
= gfc_match (" null ( )")) == MATCH_ERROR
)
1762 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1764 if ((m2
= gfc_match (" null (")) != MATCH_YES
)
1767 old_loc
= gfc_current_locus
;
1768 if ((m2
= gfc_match (" %n ) ", name
)) == MATCH_ERROR
)
1771 && ((m2
= gfc_match (" mold = %n )", name
)) == MATCH_ERROR
))
1775 gfc_current_locus
= old_loc
;
1780 /* The NULL symbol now has to be/become an intrinsic function. */
1781 if (gfc_get_symbol ("null", NULL
, &sym
))
1783 gfc_error ("NULL() initialization at %C is ambiguous");
1787 gfc_intrinsic_symbol (sym
);
1789 if (sym
->attr
.proc
!= PROC_INTRINSIC
1790 && !(sym
->attr
.use_assoc
&& sym
->attr
.intrinsic
)
1791 && (!gfc_add_procedure(&sym
->attr
, PROC_INTRINSIC
, sym
->name
, NULL
)
1792 || !gfc_add_function (&sym
->attr
, sym
->name
, NULL
)))
1795 *result
= gfc_get_null_expr (&gfc_current_locus
);
1797 /* Invalid per F2008, C512. */
1798 if (m2
== MATCH_YES
)
1800 gfc_error ("NULL() initialization at %C may not have MOLD");
1808 /* Match the initialization expr for a data pointer or procedure pointer. */
1811 match_pointer_init (gfc_expr
**init
, int procptr
)
1815 if (gfc_pure (NULL
) && gfc_state_stack
->state
!= COMP_DERIVED
)
1817 gfc_error ("Initialization of pointer at %C is not allowed in "
1818 "a PURE procedure");
1821 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
1823 /* Match NULL() initialization. */
1824 m
= gfc_match_null (init
);
1828 /* Match non-NULL initialization. */
1829 gfc_matching_ptr_assignment
= !procptr
;
1830 gfc_matching_procptr_assignment
= procptr
;
1831 m
= gfc_match_rvalue (init
);
1832 gfc_matching_ptr_assignment
= 0;
1833 gfc_matching_procptr_assignment
= 0;
1834 if (m
== MATCH_ERROR
)
1836 else if (m
== MATCH_NO
)
1838 gfc_error ("Error in pointer initialization at %C");
1842 if (!procptr
&& !gfc_resolve_expr (*init
))
1845 if (!gfc_notify_std (GFC_STD_F2008
, "non-NULL pointer "
1846 "initialization at %C"))
1854 check_function_name (char *name
)
1856 /* In functions that have a RESULT variable defined, the function name always
1857 refers to function calls. Therefore, the name is not allowed to appear in
1858 specification statements. When checking this, be careful about
1859 'hidden' procedure pointer results ('ppr@'). */
1861 if (gfc_current_state () == COMP_FUNCTION
)
1863 gfc_symbol
*block
= gfc_current_block ();
1864 if (block
&& block
->result
&& block
->result
!= block
1865 && strcmp (block
->result
->name
, "ppr@") != 0
1866 && strcmp (block
->name
, name
) == 0)
1868 gfc_error ("Function name %qs not allowed at %C", name
);
1877 /* Match a variable name with an optional initializer. When this
1878 subroutine is called, a variable is expected to be parsed next.
1879 Depending on what is happening at the moment, updates either the
1880 symbol table or the current interface. */
1883 variable_decl (int elem
)
1885 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1886 gfc_expr
*initializer
, *char_len
;
1888 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1900 /* When we get here, we've just matched a list of attributes and
1901 maybe a type and a double colon. The next thing we expect to see
1902 is the name of the symbol. */
1903 m
= gfc_match_name (name
);
1907 var_locus
= gfc_current_locus
;
1909 /* Now we could see the optional array spec. or character length. */
1910 m
= gfc_match_array_spec (&as
, true, true);
1911 if (m
== MATCH_ERROR
)
1915 as
= gfc_copy_array_spec (current_as
);
1917 && !merge_array_spec (current_as
, as
, true))
1923 if (flag_cray_pointer
)
1924 cp_as
= gfc_copy_array_spec (as
);
1926 /* At this point, we know for sure if the symbol is PARAMETER and can thus
1927 determine (and check) whether it can be implied-shape. If it
1928 was parsed as assumed-size, change it because PARAMETERs can not
1932 if (as
->type
== AS_IMPLIED_SHAPE
&& current_attr
.flavor
!= FL_PARAMETER
)
1935 gfc_error ("Non-PARAMETER symbol %qs at %L can't be implied-shape",
1940 if (as
->type
== AS_ASSUMED_SIZE
&& as
->rank
== 1
1941 && current_attr
.flavor
== FL_PARAMETER
)
1942 as
->type
= AS_IMPLIED_SHAPE
;
1944 if (as
->type
== AS_IMPLIED_SHAPE
1945 && !gfc_notify_std (GFC_STD_F2008
, "Implied-shape array at %L",
1955 cl_deferred
= false;
1957 if (current_ts
.type
== BT_CHARACTER
)
1959 switch (match_char_length (&char_len
, &cl_deferred
, false))
1962 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1964 cl
->length
= char_len
;
1967 /* Non-constant lengths need to be copied after the first
1968 element. Also copy assumed lengths. */
1971 && (current_ts
.u
.cl
->length
== NULL
1972 || current_ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1974 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1975 cl
->length
= gfc_copy_expr (current_ts
.u
.cl
->length
);
1978 cl
= current_ts
.u
.cl
;
1980 cl_deferred
= current_ts
.deferred
;
1989 /* The dummy arguments and result of the abreviated form of MODULE
1990 PROCEDUREs, used in SUBMODULES should not be redefined. */
1991 if (gfc_current_ns
->proc_name
1992 && gfc_current_ns
->proc_name
->abr_modproc_decl
)
1994 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1995 if (sym
!= NULL
&& (sym
->attr
.dummy
|| sym
->attr
.result
))
1998 gfc_error ("'%s' at %C is a redefinition of the declaration "
1999 "in the corresponding interface for MODULE "
2000 "PROCEDURE '%s'", sym
->name
,
2001 gfc_current_ns
->proc_name
->name
);
2006 /* If this symbol has already shown up in a Cray Pointer declaration,
2007 and this is not a component declaration,
2008 then we want to set the type & bail out. */
2009 if (flag_cray_pointer
&& gfc_current_state () != COMP_DERIVED
)
2011 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
2012 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
2014 sym
->ts
.type
= current_ts
.type
;
2015 sym
->ts
.kind
= current_ts
.kind
;
2017 sym
->ts
.u
.derived
= current_ts
.u
.derived
;
2018 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
2019 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
2022 /* Check to see if we have an array specification. */
2025 if (sym
->as
!= NULL
)
2027 gfc_error ("Duplicate array spec for Cray pointee at %C");
2028 gfc_free_array_spec (cp_as
);
2034 if (!gfc_set_array_spec (sym
, cp_as
, &var_locus
))
2035 gfc_internal_error ("Couldn't set pointee array spec.");
2037 /* Fix the array spec. */
2038 m
= gfc_mod_pointee_as (sym
->as
);
2039 if (m
== MATCH_ERROR
)
2047 gfc_free_array_spec (cp_as
);
2051 /* Procedure pointer as function result. */
2052 if (gfc_current_state () == COMP_FUNCTION
2053 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
2054 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
2055 strcpy (name
, "ppr@");
2057 if (gfc_current_state () == COMP_FUNCTION
2058 && strcmp (name
, gfc_current_block ()->name
) == 0
2059 && gfc_current_block ()->result
2060 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
2061 strcpy (name
, "ppr@");
2063 /* OK, we've successfully matched the declaration. Now put the
2064 symbol in the current namespace, because it might be used in the
2065 optional initialization expression for this symbol, e.g. this is
2068 integer, parameter :: i = huge(i)
2070 This is only true for parameters or variables of a basic type.
2071 For components of derived types, it is not true, so we don't
2072 create a symbol for those yet. If we fail to create the symbol,
2074 if (gfc_current_state () != COMP_DERIVED
2075 && !build_sym (name
, cl
, cl_deferred
, &as
, &var_locus
))
2081 if (!check_function_name (name
))
2087 /* We allow old-style initializations of the form
2088 integer i /2/, j(4) /3*3, 1/
2089 (if no colon has been seen). These are different from data
2090 statements in that initializers are only allowed to apply to the
2091 variable immediately preceding, i.e.
2093 is not allowed. Therefore we have to do some work manually, that
2094 could otherwise be left to the matchers for DATA statements. */
2096 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
2098 if (!gfc_notify_std (GFC_STD_GNU
, "Old-style "
2099 "initialization at %C"))
2101 else if (gfc_current_state () == COMP_DERIVED
)
2103 gfc_error ("Invalid old style initialization for derived type "
2109 return match_old_style_init (name
);
2112 /* The double colon must be present in order to have initializers.
2113 Otherwise the statement is ambiguous with an assignment statement. */
2116 if (gfc_match (" =>") == MATCH_YES
)
2118 if (!current_attr
.pointer
)
2120 gfc_error ("Initialization at %C isn't for a pointer variable");
2125 m
= match_pointer_init (&initializer
, 0);
2129 else if (gfc_match_char ('=') == MATCH_YES
)
2131 if (current_attr
.pointer
)
2133 gfc_error ("Pointer initialization at %C requires %<=>%>, "
2139 m
= gfc_match_init_expr (&initializer
);
2142 gfc_error ("Expected an initialization expression at %C");
2146 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
)
2147 && gfc_state_stack
->state
!= COMP_DERIVED
)
2149 gfc_error ("Initialization of variable at %C is not allowed in "
2150 "a PURE procedure");
2154 if (current_attr
.flavor
!= FL_PARAMETER
2155 && gfc_state_stack
->state
!= COMP_DERIVED
)
2156 gfc_unset_implicit_pure (gfc_current_ns
->proc_name
);
2163 if (initializer
!= NULL
&& current_attr
.allocatable
2164 && gfc_current_state () == COMP_DERIVED
)
2166 gfc_error ("Initialization of allocatable component at %C is not "
2172 /* Add the initializer. Note that it is fine if initializer is
2173 NULL here, because we sometimes also need to check if a
2174 declaration *must* have an initialization expression. */
2175 if (gfc_current_state () != COMP_DERIVED
)
2176 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
2179 if (current_ts
.type
== BT_DERIVED
2180 && !current_attr
.pointer
&& !initializer
)
2181 initializer
= gfc_default_initializer (¤t_ts
);
2182 t
= build_struct (name
, cl
, &initializer
, &as
);
2185 m
= (t
) ? MATCH_YES
: MATCH_ERROR
;
2188 /* Free stuff up and return. */
2189 gfc_free_expr (initializer
);
2190 gfc_free_array_spec (as
);
2196 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
2197 This assumes that the byte size is equal to the kind number for
2198 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
2201 gfc_match_old_kind_spec (gfc_typespec
*ts
)
2206 if (gfc_match_char ('*') != MATCH_YES
)
2209 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
2213 original_kind
= ts
->kind
;
2215 /* Massage the kind numbers for complex types. */
2216 if (ts
->type
== BT_COMPLEX
)
2220 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2221 gfc_basic_typename (ts
->type
), original_kind
);
2228 if (ts
->type
== BT_INTEGER
&& ts
->kind
== 4 && flag_integer4_kind
== 8)
2231 if (ts
->type
== BT_REAL
|| ts
->type
== BT_COMPLEX
)
2235 if (flag_real4_kind
== 8)
2237 if (flag_real4_kind
== 10)
2239 if (flag_real4_kind
== 16)
2245 if (flag_real8_kind
== 4)
2247 if (flag_real8_kind
== 10)
2249 if (flag_real8_kind
== 16)
2254 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2256 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2257 gfc_basic_typename (ts
->type
), original_kind
);
2261 if (!gfc_notify_std (GFC_STD_GNU
,
2262 "Nonstandard type declaration %s*%d at %C",
2263 gfc_basic_typename(ts
->type
), original_kind
))
2270 /* Match a kind specification. Since kinds are generally optional, we
2271 usually return MATCH_NO if something goes wrong. If a "kind="
2272 string is found, then we know we have an error. */
2275 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
2287 where
= loc
= gfc_current_locus
;
2292 if (gfc_match_char ('(') == MATCH_NO
)
2295 /* Also gobbles optional text. */
2296 if (gfc_match (" kind = ") == MATCH_YES
)
2299 loc
= gfc_current_locus
;
2302 n
= gfc_match_init_expr (&e
);
2306 if (gfc_matching_function
)
2308 /* The function kind expression might include use associated or
2309 imported parameters and try again after the specification
2311 if (gfc_match_char (')') != MATCH_YES
)
2313 gfc_error ("Missing right parenthesis at %C");
2319 gfc_undo_symbols ();
2324 /* ....or else, the match is real. */
2326 gfc_error ("Expected initialization expression at %C");
2334 gfc_error ("Expected scalar initialization expression at %C");
2339 msg
= gfc_extract_int (e
, &ts
->kind
);
2348 /* Before throwing away the expression, let's see if we had a
2349 C interoperable kind (and store the fact). */
2350 if (e
->ts
.is_c_interop
== 1)
2352 /* Mark this as C interoperable if being declared with one
2353 of the named constants from iso_c_binding. */
2354 ts
->is_c_interop
= e
->ts
.is_iso_c
;
2355 ts
->f90_type
= e
->ts
.f90_type
;
2361 /* Ignore errors to this point, if we've gotten here. This means
2362 we ignore the m=MATCH_ERROR from above. */
2363 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
2365 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
2366 gfc_basic_typename (ts
->type
));
2367 gfc_current_locus
= where
;
2371 /* Warn if, e.g., c_int is used for a REAL variable, but not
2372 if, e.g., c_double is used for COMPLEX as the standard
2373 explicitly says that the kind type parameter for complex and real
2374 variable is the same, i.e. c_float == c_float_complex. */
2375 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2376 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2377 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2378 gfc_warning_now (0, "C kind type parameter is for type %s but type at %L "
2379 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2380 gfc_basic_typename (ts
->type
));
2382 gfc_gobble_whitespace ();
2383 if ((c
= gfc_next_ascii_char ()) != ')'
2384 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2386 if (ts
->type
== BT_CHARACTER
)
2387 gfc_error ("Missing right parenthesis or comma at %C");
2389 gfc_error ("Missing right parenthesis at %C");
2393 /* All tests passed. */
2396 if(m
== MATCH_ERROR
)
2397 gfc_current_locus
= where
;
2399 if (ts
->type
== BT_INTEGER
&& ts
->kind
== 4 && flag_integer4_kind
== 8)
2402 if (ts
->type
== BT_REAL
|| ts
->type
== BT_COMPLEX
)
2406 if (flag_real4_kind
== 8)
2408 if (flag_real4_kind
== 10)
2410 if (flag_real4_kind
== 16)
2416 if (flag_real8_kind
== 4)
2418 if (flag_real8_kind
== 10)
2420 if (flag_real8_kind
== 16)
2425 /* Return what we know from the test(s). */
2430 gfc_current_locus
= where
;
2436 match_char_kind (int * kind
, int * is_iso_c
)
2445 where
= gfc_current_locus
;
2447 n
= gfc_match_init_expr (&e
);
2449 if (n
!= MATCH_YES
&& gfc_matching_function
)
2451 /* The expression might include use-associated or imported
2452 parameters and try again after the specification
2455 gfc_undo_symbols ();
2460 gfc_error ("Expected initialization expression at %C");
2466 gfc_error ("Expected scalar initialization expression at %C");
2471 msg
= gfc_extract_int (e
, kind
);
2472 *is_iso_c
= e
->ts
.is_iso_c
;
2482 /* Ignore errors to this point, if we've gotten here. This means
2483 we ignore the m=MATCH_ERROR from above. */
2484 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2486 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2490 /* All tests passed. */
2493 if (m
== MATCH_ERROR
)
2494 gfc_current_locus
= where
;
2496 /* Return what we know from the test(s). */
2501 gfc_current_locus
= where
;
2506 /* Match the various kind/length specifications in a CHARACTER
2507 declaration. We don't return MATCH_NO. */
2510 gfc_match_char_spec (gfc_typespec
*ts
)
2512 int kind
, seen_length
, is_iso_c
;
2524 /* Try the old-style specification first. */
2525 old_char_selector
= 0;
2527 m
= match_char_length (&len
, &deferred
, true);
2531 old_char_selector
= 1;
2536 m
= gfc_match_char ('(');
2539 m
= MATCH_YES
; /* Character without length is a single char. */
2543 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2544 if (gfc_match (" kind =") == MATCH_YES
)
2546 m
= match_char_kind (&kind
, &is_iso_c
);
2548 if (m
== MATCH_ERROR
)
2553 if (gfc_match (" , len =") == MATCH_NO
)
2556 m
= char_len_param_value (&len
, &deferred
);
2559 if (m
== MATCH_ERROR
)
2566 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2567 if (gfc_match (" len =") == MATCH_YES
)
2569 m
= char_len_param_value (&len
, &deferred
);
2572 if (m
== MATCH_ERROR
)
2576 if (gfc_match_char (')') == MATCH_YES
)
2579 if (gfc_match (" , kind =") != MATCH_YES
)
2582 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2588 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2589 m
= char_len_param_value (&len
, &deferred
);
2592 if (m
== MATCH_ERROR
)
2596 m
= gfc_match_char (')');
2600 if (gfc_match_char (',') != MATCH_YES
)
2603 gfc_match (" kind ="); /* Gobble optional text. */
2605 m
= match_char_kind (&kind
, &is_iso_c
);
2606 if (m
== MATCH_ERROR
)
2612 /* Require a right-paren at this point. */
2613 m
= gfc_match_char (')');
2618 gfc_error ("Syntax error in CHARACTER declaration at %C");
2620 gfc_free_expr (len
);
2624 /* Deal with character functions after USE and IMPORT statements. */
2625 if (gfc_matching_function
)
2627 gfc_free_expr (len
);
2628 gfc_undo_symbols ();
2634 gfc_free_expr (len
);
2638 /* Do some final massaging of the length values. */
2639 cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
2641 if (seen_length
== 0)
2642 cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
2647 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2648 ts
->deferred
= deferred
;
2650 /* We have to know if it was a C interoperable kind so we can
2651 do accurate type checking of bind(c) procs, etc. */
2653 /* Mark this as C interoperable if being declared with one
2654 of the named constants from iso_c_binding. */
2655 ts
->is_c_interop
= is_iso_c
;
2656 else if (len
!= NULL
)
2657 /* Here, we might have parsed something such as: character(c_char)
2658 In this case, the parsing code above grabs the c_char when
2659 looking for the length (line 1690, roughly). it's the last
2660 testcase for parsing the kind params of a character variable.
2661 However, it's not actually the length. this seems like it
2663 To see if the user used a C interop kind, test the expr
2664 of the so called length, and see if it's C interoperable. */
2665 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2671 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2672 structure to the matched specification. This is necessary for FUNCTION and
2673 IMPLICIT statements.
2675 If implicit_flag is nonzero, then we don't check for the optional
2676 kind specification. Not doing so is needed for matching an IMPLICIT
2677 statement correctly. */
2680 gfc_match_decl_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2682 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2683 gfc_symbol
*sym
, *dt_sym
;
2686 bool seen_deferred_kind
, matched_type
;
2687 const char *dt_name
;
2689 /* A belt and braces check that the typespec is correctly being treated
2690 as a deferred characteristic association. */
2691 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2692 && (gfc_current_block ()->result
->ts
.kind
== -1)
2693 && (ts
->kind
== -1);
2695 if (seen_deferred_kind
)
2698 /* Clear the current binding label, in case one is given. */
2699 curr_binding_label
= NULL
;
2701 if (gfc_match (" byte") == MATCH_YES
)
2703 if (!gfc_notify_std (GFC_STD_GNU
, "BYTE type at %C"))
2706 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2708 gfc_error ("BYTE type used at %C "
2709 "is not available on the target machine");
2713 ts
->type
= BT_INTEGER
;
2719 m
= gfc_match (" type (");
2720 matched_type
= (m
== MATCH_YES
);
2723 gfc_gobble_whitespace ();
2724 if (gfc_peek_ascii_char () == '*')
2726 if ((m
= gfc_match ("*)")) != MATCH_YES
)
2728 if (gfc_current_state () == COMP_DERIVED
)
2730 gfc_error ("Assumed type at %C is not allowed for components");
2733 if (!gfc_notify_std (GFC_STD_F2008_TS
, "Assumed type "
2736 ts
->type
= BT_ASSUMED
;
2740 m
= gfc_match ("%n", name
);
2741 matched_type
= (m
== MATCH_YES
);
2744 if ((matched_type
&& strcmp ("integer", name
) == 0)
2745 || (!matched_type
&& gfc_match (" integer") == MATCH_YES
))
2747 ts
->type
= BT_INTEGER
;
2748 ts
->kind
= gfc_default_integer_kind
;
2752 if ((matched_type
&& strcmp ("character", name
) == 0)
2753 || (!matched_type
&& gfc_match (" character") == MATCH_YES
))
2756 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2757 "intrinsic-type-spec at %C"))
2760 ts
->type
= BT_CHARACTER
;
2761 if (implicit_flag
== 0)
2762 m
= gfc_match_char_spec (ts
);
2766 if (matched_type
&& m
== MATCH_YES
&& gfc_match_char (')') != MATCH_YES
)
2772 if ((matched_type
&& strcmp ("real", name
) == 0)
2773 || (!matched_type
&& gfc_match (" real") == MATCH_YES
))
2776 ts
->kind
= gfc_default_real_kind
;
2781 && (strcmp ("doubleprecision", name
) == 0
2782 || (strcmp ("double", name
) == 0
2783 && gfc_match (" precision") == MATCH_YES
)))
2784 || (!matched_type
&& gfc_match (" double precision") == MATCH_YES
))
2787 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2788 "intrinsic-type-spec at %C"))
2790 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2794 ts
->kind
= gfc_default_double_kind
;
2798 if ((matched_type
&& strcmp ("complex", name
) == 0)
2799 || (!matched_type
&& gfc_match (" complex") == MATCH_YES
))
2801 ts
->type
= BT_COMPLEX
;
2802 ts
->kind
= gfc_default_complex_kind
;
2807 && (strcmp ("doublecomplex", name
) == 0
2808 || (strcmp ("double", name
) == 0
2809 && gfc_match (" complex") == MATCH_YES
)))
2810 || (!matched_type
&& gfc_match (" double complex") == MATCH_YES
))
2812 if (!gfc_notify_std (GFC_STD_GNU
, "DOUBLE COMPLEX at %C"))
2816 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2817 "intrinsic-type-spec at %C"))
2820 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
2823 ts
->type
= BT_COMPLEX
;
2824 ts
->kind
= gfc_default_double_kind
;
2828 if ((matched_type
&& strcmp ("logical", name
) == 0)
2829 || (!matched_type
&& gfc_match (" logical") == MATCH_YES
))
2831 ts
->type
= BT_LOGICAL
;
2832 ts
->kind
= gfc_default_logical_kind
;
2837 m
= gfc_match_char (')');
2840 ts
->type
= BT_DERIVED
;
2843 /* Match CLASS declarations. */
2844 m
= gfc_match (" class ( * )");
2845 if (m
== MATCH_ERROR
)
2847 else if (m
== MATCH_YES
)
2851 ts
->type
= BT_CLASS
;
2852 gfc_find_symbol ("STAR", gfc_current_ns
, 1, &upe
);
2855 upe
= gfc_new_symbol ("STAR", gfc_current_ns
);
2856 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "STAR");
2858 gfc_set_sym_referenced (upe
);
2860 upe
->ts
.type
= BT_VOID
;
2861 upe
->attr
.unlimited_polymorphic
= 1;
2862 /* This is essential to force the construction of
2863 unlimited polymorphic component class containers. */
2864 upe
->attr
.zero_comp
= 1;
2865 if (!gfc_add_flavor (&upe
->attr
, FL_DERIVED
, NULL
,
2866 &gfc_current_locus
))
2871 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, "STAR");
2873 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "STAR");
2877 ts
->u
.derived
= upe
;
2881 m
= gfc_match (" class ( %n )", name
);
2884 ts
->type
= BT_CLASS
;
2886 if (!gfc_notify_std (GFC_STD_F2003
, "CLASS statement at %C"))
2890 /* Defer association of the derived type until the end of the
2891 specification block. However, if the derived type can be
2892 found, add it to the typespec. */
2893 if (gfc_matching_function
)
2895 ts
->u
.derived
= NULL
;
2896 if (gfc_current_state () != COMP_INTERFACE
2897 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2899 sym
= gfc_find_dt_in_generic (sym
);
2900 ts
->u
.derived
= sym
;
2905 /* Search for the name but allow the components to be defined later. If
2906 type = -1, this typespec has been seen in a function declaration but
2907 the type could not be accessed at that point. The actual derived type is
2908 stored in a symtree with the first letter of the name capitalized; the
2909 symtree with the all lower-case name contains the associated
2910 generic function. */
2911 dt_name
= gfc_get_string ("%c%s",
2912 (char) TOUPPER ((unsigned char) name
[0]),
2913 (const char*)&name
[1]);
2918 gfc_get_ha_symbol (name
, &sym
);
2919 if (sym
->generic
&& gfc_find_symbol (dt_name
, NULL
, 0, &dt_sym
))
2921 gfc_error ("Type name %qs at %C is ambiguous", name
);
2924 if (sym
->generic
&& !dt_sym
)
2925 dt_sym
= gfc_find_dt_in_generic (sym
);
2927 else if (ts
->kind
== -1)
2929 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2930 || gfc_current_ns
->has_import_set
;
2931 gfc_find_symbol (name
, NULL
, iface
, &sym
);
2932 if (sym
&& sym
->generic
&& gfc_find_symbol (dt_name
, NULL
, 1, &dt_sym
))
2934 gfc_error ("Type name %qs at %C is ambiguous", name
);
2937 if (sym
&& sym
->generic
&& !dt_sym
)
2938 dt_sym
= gfc_find_dt_in_generic (sym
);
2945 if ((sym
->attr
.flavor
!= FL_UNKNOWN
2946 && !(sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.generic
))
2947 || sym
->attr
.subroutine
)
2949 gfc_error ("Type name %qs at %C conflicts with previously declared "
2950 "entity at %L, which has the same name", name
,
2955 gfc_save_symbol_data (sym
);
2956 gfc_set_sym_referenced (sym
);
2957 if (!sym
->attr
.generic
2958 && !gfc_add_generic (&sym
->attr
, sym
->name
, NULL
))
2961 if (!sym
->attr
.function
2962 && !gfc_add_function (&sym
->attr
, sym
->name
, NULL
))
2967 gfc_interface
*intr
, *head
;
2969 /* Use upper case to save the actual derived-type symbol. */
2970 gfc_get_symbol (dt_name
, NULL
, &dt_sym
);
2971 dt_sym
->name
= gfc_get_string (sym
->name
);
2972 head
= sym
->generic
;
2973 intr
= gfc_get_interface ();
2975 intr
->where
= gfc_current_locus
;
2977 sym
->generic
= intr
;
2978 sym
->attr
.if_source
= IFSRC_DECL
;
2981 gfc_save_symbol_data (dt_sym
);
2983 gfc_set_sym_referenced (dt_sym
);
2985 if (dt_sym
->attr
.flavor
!= FL_DERIVED
2986 && !gfc_add_flavor (&dt_sym
->attr
, FL_DERIVED
, sym
->name
, NULL
))
2989 ts
->u
.derived
= dt_sym
;
2995 && !gfc_notify_std (GFC_STD_F2008
, "TYPE with "
2996 "intrinsic-type-spec at %C"))
2999 /* For all types except double, derived and character, look for an
3000 optional kind specifier. MATCH_NO is actually OK at this point. */
3001 if (implicit_flag
== 1)
3003 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
3009 if (gfc_current_form
== FORM_FREE
)
3011 c
= gfc_peek_ascii_char ();
3012 if (!gfc_is_whitespace (c
) && c
!= '*' && c
!= '('
3013 && c
!= ':' && c
!= ',')
3015 if (matched_type
&& c
== ')')
3017 gfc_next_ascii_char ();
3024 m
= gfc_match_kind_spec (ts
, false);
3025 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
3027 m
= gfc_match_old_kind_spec (ts
);
3028 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) == -1)
3032 if (matched_type
&& gfc_match_char (')') != MATCH_YES
)
3035 /* Defer association of the KIND expression of function results
3036 until after USE and IMPORT statements. */
3037 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
3038 || gfc_matching_function
)
3042 m
= MATCH_YES
; /* No kind specifier found. */
3048 /* Match an IMPLICIT NONE statement. Actually, this statement is
3049 already matched in parse.c, or we would not end up here in the
3050 first place. So the only thing we need to check, is if there is
3051 trailing garbage. If not, the match is successful. */
3054 gfc_match_implicit_none (void)
3058 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3060 bool external
= false;
3061 locus cur_loc
= gfc_current_locus
;
3063 if (gfc_current_ns
->seen_implicit_none
3064 || gfc_current_ns
->has_implicit_none_export
)
3066 gfc_error ("Duplicate IMPLICIT NONE statement at %C");
3070 gfc_gobble_whitespace ();
3071 c
= gfc_peek_ascii_char ();
3074 (void) gfc_next_ascii_char ();
3075 if (!gfc_notify_std (GFC_STD_F2015
, "IMPORT NONE with spec list at %C"))
3078 gfc_gobble_whitespace ();
3079 if (gfc_peek_ascii_char () == ')')
3081 (void) gfc_next_ascii_char ();
3087 m
= gfc_match (" %n", name
);
3091 if (strcmp (name
, "type") == 0)
3093 else if (strcmp (name
, "external") == 0)
3098 gfc_gobble_whitespace ();
3099 c
= gfc_next_ascii_char ();
3110 if (gfc_match_eos () != MATCH_YES
)
3113 gfc_set_implicit_none (type
, external
, &cur_loc
);
3119 /* Match the letter range(s) of an IMPLICIT statement. */
3122 match_implicit_range (void)
3128 cur_loc
= gfc_current_locus
;
3130 gfc_gobble_whitespace ();
3131 c
= gfc_next_ascii_char ();
3134 gfc_error ("Missing character range in IMPLICIT at %C");
3141 gfc_gobble_whitespace ();
3142 c1
= gfc_next_ascii_char ();
3146 gfc_gobble_whitespace ();
3147 c
= gfc_next_ascii_char ();
3152 inner
= 0; /* Fall through. */
3159 gfc_gobble_whitespace ();
3160 c2
= gfc_next_ascii_char ();
3164 gfc_gobble_whitespace ();
3165 c
= gfc_next_ascii_char ();
3167 if ((c
!= ',') && (c
!= ')'))
3180 gfc_error ("Letters must be in alphabetic order in "
3181 "IMPLICIT statement at %C");
3185 /* See if we can add the newly matched range to the pending
3186 implicits from this IMPLICIT statement. We do not check for
3187 conflicts with whatever earlier IMPLICIT statements may have
3188 set. This is done when we've successfully finished matching
3190 if (!gfc_add_new_implicit_range (c1
, c2
))
3197 gfc_syntax_error (ST_IMPLICIT
);
3199 gfc_current_locus
= cur_loc
;
3204 /* Match an IMPLICIT statement, storing the types for
3205 gfc_set_implicit() if the statement is accepted by the parser.
3206 There is a strange looking, but legal syntactic construction
3207 possible. It looks like:
3209 IMPLICIT INTEGER (a-b) (c-d)
3211 This is legal if "a-b" is a constant expression that happens to
3212 equal one of the legal kinds for integers. The real problem
3213 happens with an implicit specification that looks like:
3215 IMPLICIT INTEGER (a-b)
3217 In this case, a typespec matcher that is "greedy" (as most of the
3218 matchers are) gobbles the character range as a kindspec, leaving
3219 nothing left. We therefore have to go a bit more slowly in the
3220 matching process by inhibiting the kindspec checking during
3221 typespec matching and checking for a kind later. */
3224 gfc_match_implicit (void)
3231 if (gfc_current_ns
->seen_implicit_none
)
3233 gfc_error ("IMPLICIT statement at %C following an IMPLICIT NONE (type) "
3240 /* We don't allow empty implicit statements. */
3241 if (gfc_match_eos () == MATCH_YES
)
3243 gfc_error ("Empty IMPLICIT statement at %C");
3249 /* First cleanup. */
3250 gfc_clear_new_implicit ();
3252 /* A basic type is mandatory here. */
3253 m
= gfc_match_decl_type_spec (&ts
, 1);
3254 if (m
== MATCH_ERROR
)
3259 cur_loc
= gfc_current_locus
;
3260 m
= match_implicit_range ();
3264 /* We may have <TYPE> (<RANGE>). */
3265 gfc_gobble_whitespace ();
3266 c
= gfc_peek_ascii_char ();
3267 if (c
== ',' || c
== '\n' || c
== ';' || c
== '!')
3269 /* Check for CHARACTER with no length parameter. */
3270 if (ts
.type
== BT_CHARACTER
&& !ts
.u
.cl
)
3272 ts
.kind
= gfc_default_character_kind
;
3273 ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
3274 ts
.u
.cl
->length
= gfc_get_int_expr (gfc_default_integer_kind
,
3278 /* Record the Successful match. */
3279 if (!gfc_merge_new_implicit (&ts
))
3282 c
= gfc_next_ascii_char ();
3283 else if (gfc_match_eos () == MATCH_ERROR
)
3288 gfc_current_locus
= cur_loc
;
3291 /* Discard the (incorrectly) matched range. */
3292 gfc_clear_new_implicit ();
3294 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
3295 if (ts
.type
== BT_CHARACTER
)
3296 m
= gfc_match_char_spec (&ts
);
3299 m
= gfc_match_kind_spec (&ts
, false);
3302 m
= gfc_match_old_kind_spec (&ts
);
3303 if (m
== MATCH_ERROR
)
3309 if (m
== MATCH_ERROR
)
3312 m
= match_implicit_range ();
3313 if (m
== MATCH_ERROR
)
3318 gfc_gobble_whitespace ();
3319 c
= gfc_next_ascii_char ();
3320 if (c
!= ',' && gfc_match_eos () != MATCH_YES
)
3323 if (!gfc_merge_new_implicit (&ts
))
3331 gfc_syntax_error (ST_IMPLICIT
);
3339 gfc_match_import (void)
3341 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3346 if (gfc_current_ns
->proc_name
== NULL
3347 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
3349 gfc_error ("IMPORT statement at %C only permitted in "
3350 "an INTERFACE body");
3354 if (gfc_current_ns
->proc_name
->attr
.module_procedure
)
3356 gfc_error ("F2008: C1210 IMPORT statement at %C is not permitted "
3357 "in a module procedure interface body");
3361 if (!gfc_notify_std (GFC_STD_F2003
, "IMPORT statement at %C"))
3364 if (gfc_match_eos () == MATCH_YES
)
3366 /* All host variables should be imported. */
3367 gfc_current_ns
->has_import_set
= 1;
3371 if (gfc_match (" ::") == MATCH_YES
)
3373 if (gfc_match_eos () == MATCH_YES
)
3375 gfc_error ("Expecting list of named entities at %C");
3383 m
= gfc_match (" %n", name
);
3387 if (gfc_current_ns
->parent
!= NULL
3388 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
3390 gfc_error ("Type name %qs at %C is ambiguous", name
);
3393 else if (!sym
&& gfc_current_ns
->proc_name
->ns
->parent
!= NULL
3394 && gfc_find_symbol (name
,
3395 gfc_current_ns
->proc_name
->ns
->parent
,
3398 gfc_error ("Type name %qs at %C is ambiguous", name
);
3404 gfc_error ("Cannot IMPORT %qs from host scoping unit "
3405 "at %C - does not exist.", name
);
3409 if (gfc_find_symtree (gfc_current_ns
->sym_root
, name
))
3411 gfc_warning (0, "%qs is already IMPORTed from host scoping unit "
3416 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
3419 sym
->attr
.imported
= 1;
3421 if (sym
->attr
.generic
&& (sym
= gfc_find_dt_in_generic (sym
)))
3423 /* The actual derived type is stored in a symtree with the first
3424 letter of the name capitalized; the symtree with the all
3425 lower-case name contains the associated generic function. */
3426 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
,
3427 gfc_get_string ("%c%s",
3428 (char) TOUPPER ((unsigned char) name
[0]),
3432 sym
->attr
.imported
= 1;
3445 if (gfc_match_eos () == MATCH_YES
)
3447 if (gfc_match_char (',') != MATCH_YES
)
3454 gfc_error ("Syntax error in IMPORT statement at %C");
3459 /* A minimal implementation of gfc_match without whitespace, escape
3460 characters or variable arguments. Returns true if the next
3461 characters match the TARGET template exactly. */
3464 match_string_p (const char *target
)
3468 for (p
= target
; *p
; p
++)
3469 if ((char) gfc_next_ascii_char () != *p
)
3474 /* Matches an attribute specification including array specs. If
3475 successful, leaves the variables current_attr and current_as
3476 holding the specification. Also sets the colon_seen variable for
3477 later use by matchers associated with initializations.
3479 This subroutine is a little tricky in the sense that we don't know
3480 if we really have an attr-spec until we hit the double colon.
3481 Until that time, we can only return MATCH_NO. This forces us to
3482 check for duplicate specification at this level. */
3485 match_attr_spec (void)
3487 /* Modifiers that can exist in a type statement. */
3489 { GFC_DECL_BEGIN
= 0,
3490 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
3491 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
3492 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
3493 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
3494 DECL_IS_BIND_C
, DECL_CODIMENSION
, DECL_ASYNCHRONOUS
, DECL_CONTIGUOUS
,
3495 DECL_NONE
, GFC_DECL_END
/* Sentinel */
3498 /* GFC_DECL_END is the sentinel, index starts at 0. */
3499 #define NUM_DECL GFC_DECL_END
3501 locus start
, seen_at
[NUM_DECL
];
3508 gfc_clear_attr (¤t_attr
);
3509 start
= gfc_current_locus
;
3514 /* See if we get all of the keywords up to the final double colon. */
3515 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3523 gfc_gobble_whitespace ();
3525 ch
= gfc_next_ascii_char ();
3528 /* This is the successful exit condition for the loop. */
3529 if (gfc_next_ascii_char () == ':')
3534 gfc_gobble_whitespace ();
3535 switch (gfc_peek_ascii_char ())
3538 gfc_next_ascii_char ();
3539 switch (gfc_next_ascii_char ())
3542 if (match_string_p ("locatable"))
3544 /* Matched "allocatable". */
3545 d
= DECL_ALLOCATABLE
;
3550 if (match_string_p ("ynchronous"))
3552 /* Matched "asynchronous". */
3553 d
= DECL_ASYNCHRONOUS
;
3560 /* Try and match the bind(c). */
3561 m
= gfc_match_bind_c (NULL
, true);
3564 else if (m
== MATCH_ERROR
)
3569 gfc_next_ascii_char ();
3570 if ('o' != gfc_next_ascii_char ())
3572 switch (gfc_next_ascii_char ())
3575 if (match_string_p ("imension"))
3577 d
= DECL_CODIMENSION
;
3581 if (match_string_p ("tiguous"))
3583 d
= DECL_CONTIGUOUS
;
3590 if (match_string_p ("dimension"))
3595 if (match_string_p ("external"))
3600 if (match_string_p ("int"))
3602 ch
= gfc_next_ascii_char ();
3605 if (match_string_p ("nt"))
3607 /* Matched "intent". */
3608 /* TODO: Call match_intent_spec from here. */
3609 if (gfc_match (" ( in out )") == MATCH_YES
)
3611 else if (gfc_match (" ( in )") == MATCH_YES
)
3613 else if (gfc_match (" ( out )") == MATCH_YES
)
3619 if (match_string_p ("insic"))
3621 /* Matched "intrinsic". */
3629 if (match_string_p ("optional"))
3634 gfc_next_ascii_char ();
3635 switch (gfc_next_ascii_char ())
3638 if (match_string_p ("rameter"))
3640 /* Matched "parameter". */
3646 if (match_string_p ("inter"))
3648 /* Matched "pointer". */
3654 ch
= gfc_next_ascii_char ();
3657 if (match_string_p ("vate"))
3659 /* Matched "private". */
3665 if (match_string_p ("tected"))
3667 /* Matched "protected". */
3674 if (match_string_p ("blic"))
3676 /* Matched "public". */
3684 if (match_string_p ("save"))
3689 if (match_string_p ("target"))
3694 gfc_next_ascii_char ();
3695 ch
= gfc_next_ascii_char ();
3698 if (match_string_p ("lue"))
3700 /* Matched "value". */
3706 if (match_string_p ("latile"))
3708 /* Matched "volatile". */
3716 /* No double colon and no recognizable decl_type, so assume that
3717 we've been looking at something else the whole time. */
3724 /* Check to make sure any parens are paired up correctly. */
3725 if (gfc_match_parens () == MATCH_ERROR
)
3732 seen_at
[d
] = gfc_current_locus
;
3734 if (d
== DECL_DIMENSION
|| d
== DECL_CODIMENSION
)
3736 gfc_array_spec
*as
= NULL
;
3738 m
= gfc_match_array_spec (&as
, d
== DECL_DIMENSION
,
3739 d
== DECL_CODIMENSION
);
3741 if (current_as
== NULL
)
3743 else if (m
== MATCH_YES
)
3745 if (!merge_array_spec (as
, current_as
, false))
3752 if (d
== DECL_CODIMENSION
)
3753 gfc_error ("Missing codimension specification at %C");
3755 gfc_error ("Missing dimension specification at %C");
3759 if (m
== MATCH_ERROR
)
3764 /* Since we've seen a double colon, we have to be looking at an
3765 attr-spec. This means that we can now issue errors. */
3766 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3771 case DECL_ALLOCATABLE
:
3772 attr
= "ALLOCATABLE";
3774 case DECL_ASYNCHRONOUS
:
3775 attr
= "ASYNCHRONOUS";
3777 case DECL_CODIMENSION
:
3778 attr
= "CODIMENSION";
3780 case DECL_CONTIGUOUS
:
3781 attr
= "CONTIGUOUS";
3783 case DECL_DIMENSION
:
3790 attr
= "INTENT (IN)";
3793 attr
= "INTENT (OUT)";
3796 attr
= "INTENT (IN OUT)";
3798 case DECL_INTRINSIC
:
3804 case DECL_PARAMETER
:
3810 case DECL_PROTECTED
:
3825 case DECL_IS_BIND_C
:
3835 attr
= NULL
; /* This shouldn't happen. */
3838 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3843 /* Now that we've dealt with duplicate attributes, add the attributes
3844 to the current attribute. */
3845 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3850 if (gfc_current_state () == COMP_DERIVED
3851 && d
!= DECL_DIMENSION
&& d
!= DECL_CODIMENSION
3852 && d
!= DECL_POINTER
&& d
!= DECL_PRIVATE
3853 && d
!= DECL_PUBLIC
&& d
!= DECL_CONTIGUOUS
&& d
!= DECL_NONE
)
3855 if (d
== DECL_ALLOCATABLE
)
3857 if (!gfc_notify_std (GFC_STD_F2003
, "ALLOCATABLE "
3858 "attribute at %C in a TYPE definition"))
3866 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3873 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3874 && gfc_current_state () != COMP_MODULE
)
3876 if (d
== DECL_PRIVATE
)
3880 if (gfc_current_state () == COMP_DERIVED
3881 && gfc_state_stack
->previous
3882 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3884 if (!gfc_notify_std (GFC_STD_F2003
, "Attribute %s "
3885 "at %L in a TYPE definition", attr
,
3894 gfc_error ("%s attribute at %L is not allowed outside of the "
3895 "specification part of a module", attr
, &seen_at
[d
]);
3903 case DECL_ALLOCATABLE
:
3904 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3907 case DECL_ASYNCHRONOUS
:
3908 if (!gfc_notify_std (GFC_STD_F2003
, "ASYNCHRONOUS attribute at %C"))
3911 t
= gfc_add_asynchronous (¤t_attr
, NULL
, &seen_at
[d
]);
3914 case DECL_CODIMENSION
:
3915 t
= gfc_add_codimension (¤t_attr
, NULL
, &seen_at
[d
]);
3918 case DECL_CONTIGUOUS
:
3919 if (!gfc_notify_std (GFC_STD_F2008
, "CONTIGUOUS attribute at %C"))
3922 t
= gfc_add_contiguous (¤t_attr
, NULL
, &seen_at
[d
]);
3925 case DECL_DIMENSION
:
3926 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3930 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3934 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3938 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3942 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3945 case DECL_INTRINSIC
:
3946 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3950 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3953 case DECL_PARAMETER
:
3954 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3958 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3961 case DECL_PROTECTED
:
3962 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3964 gfc_error ("PROTECTED at %C only allowed in specification "
3965 "part of a module");
3970 if (!gfc_notify_std (GFC_STD_F2003
, "PROTECTED attribute at %C"))
3973 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3977 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3982 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3987 t
= gfc_add_save (¤t_attr
, SAVE_EXPLICIT
, NULL
, &seen_at
[d
]);
3991 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3994 case DECL_IS_BIND_C
:
3995 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3999 if (!gfc_notify_std (GFC_STD_F2003
, "VALUE attribute at %C"))
4002 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
4006 if (!gfc_notify_std (GFC_STD_F2003
, "VOLATILE attribute at %C"))
4009 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
4013 gfc_internal_error ("match_attr_spec(): Bad attribute");
4023 /* Since Fortran 2008 module variables implicitly have the SAVE attribute. */
4024 if ((gfc_current_state () == COMP_MODULE
4025 || gfc_current_state () == COMP_SUBMODULE
)
4026 && !current_attr
.save
4027 && (gfc_option
.allow_std
& GFC_STD_F2008
) != 0)
4028 current_attr
.save
= SAVE_IMPLICIT
;
4034 gfc_current_locus
= start
;
4035 gfc_free_array_spec (current_as
);
4041 /* Set the binding label, dest_label, either with the binding label
4042 stored in the given gfc_typespec, ts, or if none was provided, it
4043 will be the symbol name in all lower case, as required by the draft
4044 (J3/04-007, section 15.4.1). If a binding label was given and
4045 there is more than one argument (num_idents), it is an error. */
4048 set_binding_label (const char **dest_label
, const char *sym_name
,
4051 if (num_idents
> 1 && has_name_equals
)
4053 gfc_error ("Multiple identifiers provided with "
4054 "single NAME= specifier at %C");
4058 if (curr_binding_label
)
4059 /* Binding label given; store in temp holder till have sym. */
4060 *dest_label
= curr_binding_label
;
4063 /* No binding label given, and the NAME= specifier did not exist,
4064 which means there was no NAME="". */
4065 if (sym_name
!= NULL
&& has_name_equals
== 0)
4066 *dest_label
= IDENTIFIER_POINTER (get_identifier (sym_name
));
4073 /* Set the status of the given common block as being BIND(C) or not,
4074 depending on the given parameter, is_bind_c. */
4077 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
4079 com_block
->is_bind_c
= is_bind_c
;
4084 /* Verify that the given gfc_typespec is for a C interoperable type. */
4087 gfc_verify_c_interop (gfc_typespec
*ts
)
4089 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
!= NULL
)
4090 return (ts
->u
.derived
->ts
.is_c_interop
|| ts
->u
.derived
->attr
.is_bind_c
)
4092 else if (ts
->type
== BT_CLASS
)
4094 else if (ts
->is_c_interop
!= 1 && ts
->type
!= BT_ASSUMED
)
4101 /* Verify that the variables of a given common block, which has been
4102 defined with the attribute specifier bind(c), to be of a C
4103 interoperable type. Errors will be reported here, if
4107 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
4109 gfc_symbol
*curr_sym
= NULL
;
4112 curr_sym
= com_block
->head
;
4114 /* Make sure we have at least one symbol. */
4115 if (curr_sym
== NULL
)
4118 /* Here we know we have a symbol, so we'll execute this loop
4122 /* The second to last param, 1, says this is in a common block. */
4123 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
4124 curr_sym
= curr_sym
->common_next
;
4125 } while (curr_sym
!= NULL
);
4131 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
4132 an appropriate error message is reported. */
4135 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
4136 int is_in_common
, gfc_common_head
*com_block
)
4138 bool bind_c_function
= false;
4141 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
4142 bind_c_function
= true;
4144 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
4146 tmp_sym
= tmp_sym
->result
;
4147 /* Make sure it wasn't an implicitly typed result. */
4148 if (tmp_sym
->attr
.implicit_type
&& warn_c_binding_type
)
4150 gfc_warning (OPT_Wc_binding_type
,
4151 "Implicitly declared BIND(C) function %qs at "
4152 "%L may not be C interoperable", tmp_sym
->name
,
4153 &tmp_sym
->declared_at
);
4154 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
4155 /* Mark it as C interoperable to prevent duplicate warnings. */
4156 tmp_sym
->ts
.is_c_interop
= 1;
4157 tmp_sym
->attr
.is_c_interop
= 1;
4161 /* Here, we know we have the bind(c) attribute, so if we have
4162 enough type info, then verify that it's a C interop kind.
4163 The info could be in the symbol already, or possibly still in
4164 the given ts (current_ts), so look in both. */
4165 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
4167 if (!gfc_verify_c_interop (&(tmp_sym
->ts
)))
4169 /* See if we're dealing with a sym in a common block or not. */
4170 if (is_in_common
== 1 && warn_c_binding_type
)
4172 gfc_warning (OPT_Wc_binding_type
,
4173 "Variable %qs in common block %qs at %L "
4174 "may not be a C interoperable "
4175 "kind though common block %qs is BIND(C)",
4176 tmp_sym
->name
, com_block
->name
,
4177 &(tmp_sym
->declared_at
), com_block
->name
);
4181 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
4182 gfc_error ("Type declaration %qs at %L is not C "
4183 "interoperable but it is BIND(C)",
4184 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4185 else if (warn_c_binding_type
)
4186 gfc_warning (OPT_Wc_binding_type
, "Variable %qs at %L "
4187 "may not be a C interoperable "
4188 "kind but it is BIND(C)",
4189 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4193 /* Variables declared w/in a common block can't be bind(c)
4194 since there's no way for C to see these variables, so there's
4195 semantically no reason for the attribute. */
4196 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
4198 gfc_error ("Variable %qs in common block %qs at "
4199 "%L cannot be declared with BIND(C) "
4200 "since it is not a global",
4201 tmp_sym
->name
, com_block
->name
,
4202 &(tmp_sym
->declared_at
));
4206 /* Scalar variables that are bind(c) can not have the pointer
4207 or allocatable attributes. */
4208 if (tmp_sym
->attr
.is_bind_c
== 1)
4210 if (tmp_sym
->attr
.pointer
== 1)
4212 gfc_error ("Variable %qs at %L cannot have both the "
4213 "POINTER and BIND(C) attributes",
4214 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4218 if (tmp_sym
->attr
.allocatable
== 1)
4220 gfc_error ("Variable %qs at %L cannot have both the "
4221 "ALLOCATABLE and BIND(C) attributes",
4222 tmp_sym
->name
, &(tmp_sym
->declared_at
));
4228 /* If it is a BIND(C) function, make sure the return value is a
4229 scalar value. The previous tests in this function made sure
4230 the type is interoperable. */
4231 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
4232 gfc_error ("Return type of BIND(C) function %qs at %L cannot "
4233 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
4235 /* BIND(C) functions can not return a character string. */
4236 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
4237 if (tmp_sym
->ts
.u
.cl
== NULL
|| tmp_sym
->ts
.u
.cl
->length
== NULL
4238 || tmp_sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
4239 || mpz_cmp_si (tmp_sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
4240 gfc_error ("Return type of BIND(C) function %qs at %L cannot "
4241 "be a character string", tmp_sym
->name
,
4242 &(tmp_sym
->declared_at
));
4245 /* See if the symbol has been marked as private. If it has, make sure
4246 there is no binding label and warn the user if there is one. */
4247 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
4248 && tmp_sym
->binding_label
)
4249 /* Use gfc_warning_now because we won't say that the symbol fails
4250 just because of this. */
4251 gfc_warning_now (0, "Symbol %qs at %L is marked PRIVATE but has been "
4252 "given the binding label %qs", tmp_sym
->name
,
4253 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
4259 /* Set the appropriate fields for a symbol that's been declared as
4260 BIND(C) (the is_bind_c flag and the binding label), and verify that
4261 the type is C interoperable. Errors are reported by the functions
4262 used to set/test these fields. */
4265 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
4269 /* TODO: Do we need to make sure the vars aren't marked private? */
4271 /* Set the is_bind_c bit in symbol_attribute. */
4272 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
4274 if (!set_binding_label (&tmp_sym
->binding_label
, tmp_sym
->name
, num_idents
))
4281 /* Set the fields marking the given common block as BIND(C), including
4282 a binding label, and report any errors encountered. */
4285 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
4289 /* destLabel, common name, typespec (which may have binding label). */
4290 if (!set_binding_label (&com_block
->binding_label
, com_block
->name
,
4294 /* Set the given common block (com_block) to being bind(c) (1). */
4295 set_com_block_bind_c (com_block
, 1);
4301 /* Retrieve the list of one or more identifiers that the given bind(c)
4302 attribute applies to. */
4305 get_bind_c_idents (void)
4307 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4309 gfc_symbol
*tmp_sym
= NULL
;
4311 gfc_common_head
*com_block
= NULL
;
4313 if (gfc_match_name (name
) == MATCH_YES
)
4315 found_id
= MATCH_YES
;
4316 gfc_get_ha_symbol (name
, &tmp_sym
);
4318 else if (match_common_name (name
) == MATCH_YES
)
4320 found_id
= MATCH_YES
;
4321 com_block
= gfc_get_common (name
, 0);
4325 gfc_error ("Need either entity or common block name for "
4326 "attribute specification statement at %C");
4330 /* Save the current identifier and look for more. */
4333 /* Increment the number of identifiers found for this spec stmt. */
4336 /* Make sure we have a sym or com block, and verify that it can
4337 be bind(c). Set the appropriate field(s) and look for more
4339 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
4341 if (tmp_sym
!= NULL
)
4343 if (!set_verify_bind_c_sym (tmp_sym
, num_idents
))
4348 if (!set_verify_bind_c_com_block (com_block
, num_idents
))
4352 /* Look to see if we have another identifier. */
4354 if (gfc_match_eos () == MATCH_YES
)
4355 found_id
= MATCH_NO
;
4356 else if (gfc_match_char (',') != MATCH_YES
)
4357 found_id
= MATCH_NO
;
4358 else if (gfc_match_name (name
) == MATCH_YES
)
4360 found_id
= MATCH_YES
;
4361 gfc_get_ha_symbol (name
, &tmp_sym
);
4363 else if (match_common_name (name
) == MATCH_YES
)
4365 found_id
= MATCH_YES
;
4366 com_block
= gfc_get_common (name
, 0);
4370 gfc_error ("Missing entity or common block name for "
4371 "attribute specification statement at %C");
4377 gfc_internal_error ("Missing symbol");
4379 } while (found_id
== MATCH_YES
);
4381 /* if we get here we were successful */
4386 /* Try and match a BIND(C) attribute specification statement. */
4389 gfc_match_bind_c_stmt (void)
4391 match found_match
= MATCH_NO
;
4396 /* This may not be necessary. */
4398 /* Clear the temporary binding label holder. */
4399 curr_binding_label
= NULL
;
4401 /* Look for the bind(c). */
4402 found_match
= gfc_match_bind_c (NULL
, true);
4404 if (found_match
== MATCH_YES
)
4406 if (!gfc_notify_std (GFC_STD_F2003
, "BIND(C) statement at %C"))
4409 /* Look for the :: now, but it is not required. */
4412 /* Get the identifier(s) that needs to be updated. This may need to
4413 change to hand the flag(s) for the attr specified so all identifiers
4414 found can have all appropriate parts updated (assuming that the same
4415 spec stmt can have multiple attrs, such as both bind(c) and
4417 if (!get_bind_c_idents ())
4418 /* Error message should have printed already. */
4426 /* Match a data declaration statement. */
4429 gfc_match_data_decl (void)
4435 num_idents_on_line
= 0;
4437 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
4441 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4442 && gfc_current_state () != COMP_DERIVED
)
4444 sym
= gfc_use_derived (current_ts
.u
.derived
);
4452 current_ts
.u
.derived
= sym
;
4455 m
= match_attr_spec ();
4456 if (m
== MATCH_ERROR
)
4462 if (current_ts
.type
== BT_CLASS
4463 && current_ts
.u
.derived
->attr
.unlimited_polymorphic
)
4466 if ((current_ts
.type
== BT_DERIVED
|| current_ts
.type
== BT_CLASS
)
4467 && current_ts
.u
.derived
->components
== NULL
4468 && !current_ts
.u
.derived
->attr
.zero_comp
)
4471 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
4474 gfc_find_symbol (current_ts
.u
.derived
->name
,
4475 current_ts
.u
.derived
->ns
, 1, &sym
);
4477 /* Any symbol that we find had better be a type definition
4478 which has its components defined. */
4479 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
4480 && (current_ts
.u
.derived
->components
!= NULL
4481 || current_ts
.u
.derived
->attr
.zero_comp
))
4484 gfc_error ("Derived type at %C has not been previously defined "
4485 "and so cannot appear in a derived type definition");
4491 /* If we have an old-style character declaration, and no new-style
4492 attribute specifications, then there a comma is optional between
4493 the type specification and the variable list. */
4494 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
4495 gfc_match_char (',');
4497 /* Give the types/attributes to symbols that follow. Give the element
4498 a number so that repeat character length expressions can be copied. */
4502 num_idents_on_line
++;
4503 m
= variable_decl (elem
++);
4504 if (m
== MATCH_ERROR
)
4509 if (gfc_match_eos () == MATCH_YES
)
4511 if (gfc_match_char (',') != MATCH_YES
)
4515 if (!gfc_error_flag_test ())
4516 gfc_error ("Syntax error in data declaration at %C");
4519 gfc_free_data_all (gfc_current_ns
);
4522 gfc_free_array_spec (current_as
);
4528 /* Match a prefix associated with a function or subroutine
4529 declaration. If the typespec pointer is nonnull, then a typespec
4530 can be matched. Note that if nothing matches, MATCH_YES is
4531 returned (the null string was matched). */
4534 gfc_match_prefix (gfc_typespec
*ts
)
4540 gfc_clear_attr (¤t_attr
);
4542 seen_impure
= false;
4544 gcc_assert (!gfc_matching_prefix
);
4545 gfc_matching_prefix
= true;
4549 found_prefix
= false;
4551 if (!seen_type
&& ts
!= NULL
4552 && gfc_match_decl_type_spec (ts
, 0) == MATCH_YES
4553 && gfc_match_space () == MATCH_YES
)
4557 found_prefix
= true;
4560 if (gfc_match ("elemental% ") == MATCH_YES
)
4562 if (!gfc_add_elemental (¤t_attr
, NULL
))
4565 found_prefix
= true;
4568 if (gfc_match ("pure% ") == MATCH_YES
)
4570 if (!gfc_add_pure (¤t_attr
, NULL
))
4573 found_prefix
= true;
4576 if (gfc_match ("recursive% ") == MATCH_YES
)
4578 if (!gfc_add_recursive (¤t_attr
, NULL
))
4581 found_prefix
= true;
4584 /* IMPURE is a somewhat special case, as it needs not set an actual
4585 attribute but rather only prevents ELEMENTAL routines from being
4586 automatically PURE. */
4587 if (gfc_match ("impure% ") == MATCH_YES
)
4589 if (!gfc_notify_std (GFC_STD_F2008
, "IMPURE procedure at %C"))
4593 found_prefix
= true;
4596 while (found_prefix
);
4598 /* IMPURE and PURE must not both appear, of course. */
4599 if (seen_impure
&& current_attr
.pure
)
4601 gfc_error ("PURE and IMPURE must not appear both at %C");
4605 /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */
4606 if (!seen_impure
&& current_attr
.elemental
&& !current_attr
.pure
)
4608 if (!gfc_add_pure (¤t_attr
, NULL
))
4612 /* At this point, the next item is not a prefix. */
4613 gcc_assert (gfc_matching_prefix
);
4615 /* MODULE should be the last prefix before FUNCTION or SUBROUTINE.
4616 Since this is a prefix like PURE, ELEMENTAL, etc., having a
4617 corresponding attribute seems natural and distinguishes these
4618 procedures from procedure types of PROC_MODULE, which these are
4620 if ((gfc_current_state () == COMP_INTERFACE
4621 || gfc_current_state () == COMP_CONTAINS
)
4622 && gfc_match ("module% ") == MATCH_YES
)
4624 if (!gfc_notify_std (GFC_STD_F2008
, "MODULE prefix at %C"))
4627 current_attr
.module_procedure
= 1;
4630 gfc_matching_prefix
= false;
4634 gcc_assert (gfc_matching_prefix
);
4635 gfc_matching_prefix
= false;
4640 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
4643 copy_prefix (symbol_attribute
*dest
, locus
*where
)
4645 if (current_attr
.pure
&& !gfc_add_pure (dest
, where
))
4648 if (current_attr
.elemental
&& !gfc_add_elemental (dest
, where
))
4651 if (current_attr
.recursive
&& !gfc_add_recursive (dest
, where
))
4658 /* Match a formal argument list. */
4661 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
4663 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
4664 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4667 gfc_formal_arglist
*formal
= NULL
;
4671 /* Keep the interface formal argument list and null it so that the
4672 matching for the new declaration can be done. The numbers and
4673 names of the arguments are checked here. The interface formal
4674 arguments are retained in formal_arglist and the characteristics
4675 are compared in resolve.c(resolve_fl_procedure). See the remark
4676 in get_proc_name about the eventual need to copy the formal_arglist
4677 and populate the formal namespace of the interface symbol. */
4678 if (progname
->attr
.module_procedure
4679 && progname
->attr
.host_assoc
)
4681 formal
= progname
->formal
;
4682 progname
->formal
= NULL
;
4685 if (gfc_match_char ('(') != MATCH_YES
)
4692 if (gfc_match_char (')') == MATCH_YES
)
4697 if (gfc_match_char ('*') == MATCH_YES
)
4700 if (!gfc_notify_std (GFC_STD_F95_OBS
, "Alternate-return argument "
4709 m
= gfc_match_name (name
);
4713 if (gfc_get_symbol (name
, NULL
, &sym
))
4717 p
= gfc_get_formal_arglist ();
4729 /* We don't add the VARIABLE flavor because the name could be a
4730 dummy procedure. We don't apply these attributes to formal
4731 arguments of statement functions. */
4732 if (sym
!= NULL
&& !st_flag
4733 && (!gfc_add_dummy(&sym
->attr
, sym
->name
, NULL
)
4734 || !gfc_missing_attr (&sym
->attr
, NULL
)))
4740 /* The name of a program unit can be in a different namespace,
4741 so check for it explicitly. After the statement is accepted,
4742 the name is checked for especially in gfc_get_symbol(). */
4743 if (gfc_new_block
!= NULL
&& sym
!= NULL
4744 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
4746 gfc_error ("Name %qs at %C is the name of the procedure",
4752 if (gfc_match_char (')') == MATCH_YES
)
4755 m
= gfc_match_char (',');
4758 gfc_error ("Unexpected junk in formal argument list at %C");
4764 /* Check for duplicate symbols in the formal argument list. */
4767 for (p
= head
; p
->next
; p
= p
->next
)
4772 for (q
= p
->next
; q
; q
= q
->next
)
4773 if (p
->sym
== q
->sym
)
4775 gfc_error ("Duplicate symbol %qs in formal argument list "
4776 "at %C", p
->sym
->name
);
4784 if (!gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
))
4792 for (p
= formal
, q
= head
; p
&& q
; p
= p
->next
, q
= q
->next
)
4794 if ((p
->next
!= NULL
&& q
->next
== NULL
)
4795 || (p
->next
== NULL
&& q
->next
!= NULL
))
4796 gfc_error_now ("Mismatch in number of MODULE PROCEDURE "
4797 "formal arguments at %C");
4798 else if ((p
->sym
== NULL
&& q
->sym
== NULL
)
4799 || strcmp (p
->sym
->name
, q
->sym
->name
) == 0)
4802 gfc_error_now ("Mismatch in MODULE PROCEDURE formal "
4803 "argument names (%s/%s) at %C",
4804 p
->sym
->name
, q
->sym
->name
);
4811 gfc_free_formal_arglist (head
);
4816 /* Match a RESULT specification following a function declaration or
4817 ENTRY statement. Also matches the end-of-statement. */
4820 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
4822 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4826 if (gfc_match (" result (") != MATCH_YES
)
4829 m
= gfc_match_name (name
);
4833 /* Get the right paren, and that's it because there could be the
4834 bind(c) attribute after the result clause. */
4835 if (gfc_match_char (')') != MATCH_YES
)
4837 /* TODO: should report the missing right paren here. */
4841 if (strcmp (function
->name
, name
) == 0)
4843 gfc_error ("RESULT variable at %C must be different than function name");
4847 if (gfc_get_symbol (name
, NULL
, &r
))
4850 if (!gfc_add_result (&r
->attr
, r
->name
, NULL
))
4859 /* Match a function suffix, which could be a combination of a result
4860 clause and BIND(C), either one, or neither. The draft does not
4861 require them to come in a specific order. */
4864 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4866 match is_bind_c
; /* Found bind(c). */
4867 match is_result
; /* Found result clause. */
4868 match found_match
; /* Status of whether we've found a good match. */
4869 char peek_char
; /* Character we're going to peek at. */
4870 bool allow_binding_name
;
4872 /* Initialize to having found nothing. */
4873 found_match
= MATCH_NO
;
4874 is_bind_c
= MATCH_NO
;
4875 is_result
= MATCH_NO
;
4877 /* Get the next char to narrow between result and bind(c). */
4878 gfc_gobble_whitespace ();
4879 peek_char
= gfc_peek_ascii_char ();
4881 /* C binding names are not allowed for internal procedures. */
4882 if (gfc_current_state () == COMP_CONTAINS
4883 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4884 allow_binding_name
= false;
4886 allow_binding_name
= true;
4891 /* Look for result clause. */
4892 is_result
= match_result (sym
, result
);
4893 if (is_result
== MATCH_YES
)
4895 /* Now see if there is a bind(c) after it. */
4896 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4897 /* We've found the result clause and possibly bind(c). */
4898 found_match
= MATCH_YES
;
4901 /* This should only be MATCH_ERROR. */
4902 found_match
= is_result
;
4905 /* Look for bind(c) first. */
4906 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4907 if (is_bind_c
== MATCH_YES
)
4909 /* Now see if a result clause followed it. */
4910 is_result
= match_result (sym
, result
);
4911 found_match
= MATCH_YES
;
4915 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4916 found_match
= MATCH_ERROR
;
4920 gfc_error ("Unexpected junk after function declaration at %C");
4921 found_match
= MATCH_ERROR
;
4925 if (is_bind_c
== MATCH_YES
)
4927 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4928 if (gfc_current_state () == COMP_CONTAINS
4929 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4930 && !gfc_notify_std (GFC_STD_F2008
, "BIND(C) attribute "
4931 "at %L may not be specified for an internal "
4932 "procedure", &gfc_current_locus
))
4935 if (!gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1))
4943 /* Procedure pointer return value without RESULT statement:
4944 Add "hidden" result variable named "ppr@". */
4947 add_hidden_procptr_result (gfc_symbol
*sym
)
4951 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4954 /* First usage case: PROCEDURE and EXTERNAL statements. */
4955 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4956 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4957 && sym
->attr
.external
;
4958 /* Second usage case: INTERFACE statements. */
4959 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4960 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4961 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4967 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4971 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4972 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4973 st2
->n
.sym
= stree
->n
.sym
;
4975 sym
->result
= stree
->n
.sym
;
4977 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4978 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4979 sym
->result
->attr
.external
= sym
->attr
.external
;
4980 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4981 sym
->result
->ts
= sym
->ts
;
4982 sym
->attr
.proc_pointer
= 0;
4983 sym
->attr
.pointer
= 0;
4984 sym
->attr
.external
= 0;
4985 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4987 sym
->result
->attr
.pointer
= 0;
4988 sym
->result
->attr
.proc_pointer
= 1;
4991 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4993 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4994 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4995 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4996 && sym
== gfc_current_ns
->proc_name
4997 && sym
== sym
->result
->ns
->proc_name
4998 && strcmp ("ppr@", sym
->result
->name
) == 0)
5000 sym
->result
->attr
.proc_pointer
= 1;
5001 sym
->attr
.pointer
= 0;
5009 /* Match the interface for a PROCEDURE declaration,
5010 including brackets (R1212). */
5013 match_procedure_interface (gfc_symbol
**proc_if
)
5017 locus old_loc
, entry_loc
;
5018 gfc_namespace
*old_ns
= gfc_current_ns
;
5019 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5021 old_loc
= entry_loc
= gfc_current_locus
;
5022 gfc_clear_ts (¤t_ts
);
5024 if (gfc_match (" (") != MATCH_YES
)
5026 gfc_current_locus
= entry_loc
;
5030 /* Get the type spec. for the procedure interface. */
5031 old_loc
= gfc_current_locus
;
5032 m
= gfc_match_decl_type_spec (¤t_ts
, 0);
5033 gfc_gobble_whitespace ();
5034 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
5037 if (m
== MATCH_ERROR
)
5040 /* Procedure interface is itself a procedure. */
5041 gfc_current_locus
= old_loc
;
5042 m
= gfc_match_name (name
);
5044 /* First look to see if it is already accessible in the current
5045 namespace because it is use associated or contained. */
5047 if (gfc_find_sym_tree (name
, NULL
, 0, &st
))
5050 /* If it is still not found, then try the parent namespace, if it
5051 exists and create the symbol there if it is still not found. */
5052 if (gfc_current_ns
->parent
)
5053 gfc_current_ns
= gfc_current_ns
->parent
;
5054 if (st
== NULL
&& gfc_get_ha_sym_tree (name
, &st
))
5057 gfc_current_ns
= old_ns
;
5058 *proc_if
= st
->n
.sym
;
5063 /* Resolve interface if possible. That way, attr.procedure is only set
5064 if it is declared by a later procedure-declaration-stmt, which is
5065 invalid per F08:C1216 (cf. resolve_procedure_interface). */
5066 while ((*proc_if
)->ts
.interface
)
5067 *proc_if
= (*proc_if
)->ts
.interface
;
5069 if ((*proc_if
)->attr
.flavor
== FL_UNKNOWN
5070 && (*proc_if
)->ts
.type
== BT_UNKNOWN
5071 && !gfc_add_flavor (&(*proc_if
)->attr
, FL_PROCEDURE
,
5072 (*proc_if
)->name
, NULL
))
5077 if (gfc_match (" )") != MATCH_YES
)
5079 gfc_current_locus
= entry_loc
;
5087 /* Match a PROCEDURE declaration (R1211). */
5090 match_procedure_decl (void)
5093 gfc_symbol
*sym
, *proc_if
= NULL
;
5095 gfc_expr
*initializer
= NULL
;
5097 /* Parse interface (with brackets). */
5098 m
= match_procedure_interface (&proc_if
);
5102 /* Parse attributes (with colons). */
5103 m
= match_attr_spec();
5104 if (m
== MATCH_ERROR
)
5107 if (proc_if
&& proc_if
->attr
.is_bind_c
&& !current_attr
.is_bind_c
)
5109 current_attr
.is_bind_c
= 1;
5110 has_name_equals
= 0;
5111 curr_binding_label
= NULL
;
5114 /* Get procedure symbols. */
5117 m
= gfc_match_symbol (&sym
, 0);
5120 else if (m
== MATCH_ERROR
)
5123 /* Add current_attr to the symbol attributes. */
5124 if (!gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
))
5127 if (sym
->attr
.is_bind_c
)
5129 /* Check for C1218. */
5130 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
5132 gfc_error ("BIND(C) attribute at %C requires "
5133 "an interface with BIND(C)");
5136 /* Check for C1217. */
5137 if (has_name_equals
&& sym
->attr
.pointer
)
5139 gfc_error ("BIND(C) procedure with NAME may not have "
5140 "POINTER attribute at %C");
5143 if (has_name_equals
&& sym
->attr
.dummy
)
5145 gfc_error ("Dummy procedure at %C may not have "
5146 "BIND(C) attribute with NAME");
5149 /* Set binding label for BIND(C). */
5150 if (!set_binding_label (&sym
->binding_label
, sym
->name
, num
))
5154 if (!gfc_add_external (&sym
->attr
, NULL
))
5157 if (add_hidden_procptr_result (sym
))
5160 if (!gfc_add_proc (&sym
->attr
, sym
->name
, NULL
))
5163 /* Set interface. */
5164 if (proc_if
!= NULL
)
5166 if (sym
->ts
.type
!= BT_UNKNOWN
)
5168 gfc_error ("Procedure %qs at %L already has basic type of %s",
5169 sym
->name
, &gfc_current_locus
,
5170 gfc_basic_typename (sym
->ts
.type
));
5173 sym
->ts
.interface
= proc_if
;
5174 sym
->attr
.untyped
= 1;
5175 sym
->attr
.if_source
= IFSRC_IFBODY
;
5177 else if (current_ts
.type
!= BT_UNKNOWN
)
5179 if (!gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
))
5181 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
5182 sym
->ts
.interface
->ts
= current_ts
;
5183 sym
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
5184 sym
->ts
.interface
->attr
.function
= 1;
5185 sym
->attr
.function
= 1;
5186 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
5189 if (gfc_match (" =>") == MATCH_YES
)
5191 if (!current_attr
.pointer
)
5193 gfc_error ("Initialization at %C isn't for a pointer variable");
5198 m
= match_pointer_init (&initializer
, 1);
5202 if (!add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
))
5207 if (gfc_match_eos () == MATCH_YES
)
5209 if (gfc_match_char (',') != MATCH_YES
)
5214 gfc_error ("Syntax error in PROCEDURE statement at %C");
5218 /* Free stuff up and return. */
5219 gfc_free_expr (initializer
);
5225 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
5228 /* Match a procedure pointer component declaration (R445). */
5231 match_ppc_decl (void)
5234 gfc_symbol
*proc_if
= NULL
;
5238 gfc_expr
*initializer
= NULL
;
5239 gfc_typebound_proc
* tb
;
5240 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5242 /* Parse interface (with brackets). */
5243 m
= match_procedure_interface (&proc_if
);
5247 /* Parse attributes. */
5248 tb
= XCNEW (gfc_typebound_proc
);
5249 tb
->where
= gfc_current_locus
;
5250 m
= match_binding_attributes (tb
, false, true);
5251 if (m
== MATCH_ERROR
)
5254 gfc_clear_attr (¤t_attr
);
5255 current_attr
.procedure
= 1;
5256 current_attr
.proc_pointer
= 1;
5257 current_attr
.access
= tb
->access
;
5258 current_attr
.flavor
= FL_PROCEDURE
;
5260 /* Match the colons (required). */
5261 if (gfc_match (" ::") != MATCH_YES
)
5263 gfc_error ("Expected %<::%> after binding-attributes at %C");
5267 /* Check for C450. */
5268 if (!tb
->nopass
&& proc_if
== NULL
)
5270 gfc_error("NOPASS or explicit interface required at %C");
5274 if (!gfc_notify_std (GFC_STD_F2003
, "Procedure pointer component at %C"))
5277 /* Match PPC names. */
5281 m
= gfc_match_name (name
);
5284 else if (m
== MATCH_ERROR
)
5287 if (!gfc_add_component (gfc_current_block(), name
, &c
))
5290 /* Add current_attr to the symbol attributes. */
5291 if (!gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
))
5294 if (!gfc_add_external (&c
->attr
, NULL
))
5297 if (!gfc_add_proc (&c
->attr
, name
, NULL
))
5304 c
->tb
= XCNEW (gfc_typebound_proc
);
5305 c
->tb
->where
= gfc_current_locus
;
5309 /* Set interface. */
5310 if (proc_if
!= NULL
)
5312 c
->ts
.interface
= proc_if
;
5313 c
->attr
.untyped
= 1;
5314 c
->attr
.if_source
= IFSRC_IFBODY
;
5316 else if (ts
.type
!= BT_UNKNOWN
)
5319 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
5320 c
->ts
.interface
->result
= c
->ts
.interface
;
5321 c
->ts
.interface
->ts
= ts
;
5322 c
->ts
.interface
->attr
.flavor
= FL_PROCEDURE
;
5323 c
->ts
.interface
->attr
.function
= 1;
5324 c
->attr
.function
= 1;
5325 c
->attr
.if_source
= IFSRC_UNKNOWN
;
5328 if (gfc_match (" =>") == MATCH_YES
)
5330 m
= match_pointer_init (&initializer
, 1);
5333 gfc_free_expr (initializer
);
5336 c
->initializer
= initializer
;
5339 if (gfc_match_eos () == MATCH_YES
)
5341 if (gfc_match_char (',') != MATCH_YES
)
5346 gfc_error ("Syntax error in procedure pointer component at %C");
5351 /* Match a PROCEDURE declaration inside an interface (R1206). */
5354 match_procedure_in_interface (void)
5358 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5361 if (current_interface
.type
== INTERFACE_NAMELESS
5362 || current_interface
.type
== INTERFACE_ABSTRACT
)
5364 gfc_error ("PROCEDURE at %C must be in a generic interface");
5368 /* Check if the F2008 optional double colon appears. */
5369 gfc_gobble_whitespace ();
5370 old_locus
= gfc_current_locus
;
5371 if (gfc_match ("::") == MATCH_YES
)
5373 if (!gfc_notify_std (GFC_STD_F2008
, "double colon in "
5374 "MODULE PROCEDURE statement at %L", &old_locus
))
5378 gfc_current_locus
= old_locus
;
5382 m
= gfc_match_name (name
);
5385 else if (m
== MATCH_ERROR
)
5387 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
5390 if (!gfc_add_interface (sym
))
5393 if (gfc_match_eos () == MATCH_YES
)
5395 if (gfc_match_char (',') != MATCH_YES
)
5402 gfc_error ("Syntax error in PROCEDURE statement at %C");
5407 /* General matcher for PROCEDURE declarations. */
5409 static match
match_procedure_in_type (void);
5412 gfc_match_procedure (void)
5416 switch (gfc_current_state ())
5421 case COMP_SUBMODULE
:
5422 case COMP_SUBROUTINE
:
5425 m
= match_procedure_decl ();
5427 case COMP_INTERFACE
:
5428 m
= match_procedure_in_interface ();
5431 m
= match_ppc_decl ();
5433 case COMP_DERIVED_CONTAINS
:
5434 m
= match_procedure_in_type ();
5443 if (!gfc_notify_std (GFC_STD_F2003
, "PROCEDURE statement at %C"))
5450 /* Warn if a matched procedure has the same name as an intrinsic; this is
5451 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
5452 parser-state-stack to find out whether we're in a module. */
5455 do_warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
5459 in_module
= (gfc_state_stack
->previous
5460 && (gfc_state_stack
->previous
->state
== COMP_MODULE
5461 || gfc_state_stack
->previous
->state
== COMP_SUBMODULE
));
5463 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
5467 /* Match a function declaration. */
5470 gfc_match_function_decl (void)
5472 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5473 gfc_symbol
*sym
, *result
;
5477 match found_match
; /* Status returned by match func. */
5479 if (gfc_current_state () != COMP_NONE
5480 && gfc_current_state () != COMP_INTERFACE
5481 && gfc_current_state () != COMP_CONTAINS
)
5484 gfc_clear_ts (¤t_ts
);
5486 old_loc
= gfc_current_locus
;
5488 m
= gfc_match_prefix (¤t_ts
);
5491 gfc_current_locus
= old_loc
;
5495 if (gfc_match ("function% %n", name
) != MATCH_YES
)
5497 gfc_current_locus
= old_loc
;
5501 if (get_proc_name (name
, &sym
, false))
5504 if (add_hidden_procptr_result (sym
))
5507 if (current_attr
.module_procedure
)
5508 sym
->attr
.module_procedure
= 1;
5510 gfc_new_block
= sym
;
5512 m
= gfc_match_formal_arglist (sym
, 0, 0);
5515 gfc_error ("Expected formal argument list in function "
5516 "definition at %C");
5520 else if (m
== MATCH_ERROR
)
5525 /* According to the draft, the bind(c) and result clause can
5526 come in either order after the formal_arg_list (i.e., either
5527 can be first, both can exist together or by themselves or neither
5528 one). Therefore, the match_result can't match the end of the
5529 string, and check for the bind(c) or result clause in either order. */
5530 found_match
= gfc_match_eos ();
5532 /* Make sure that it isn't already declared as BIND(C). If it is, it
5533 must have been marked BIND(C) with a BIND(C) attribute and that is
5534 not allowed for procedures. */
5535 if (sym
->attr
.is_bind_c
== 1)
5537 sym
->attr
.is_bind_c
= 0;
5538 if (sym
->old_symbol
!= NULL
)
5539 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5540 "variables or common blocks",
5541 &(sym
->old_symbol
->declared_at
));
5543 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5544 "variables or common blocks", &gfc_current_locus
);
5547 if (found_match
!= MATCH_YES
)
5549 /* If we haven't found the end-of-statement, look for a suffix. */
5550 suffix_match
= gfc_match_suffix (sym
, &result
);
5551 if (suffix_match
== MATCH_YES
)
5552 /* Need to get the eos now. */
5553 found_match
= gfc_match_eos ();
5555 found_match
= suffix_match
;
5558 if(found_match
!= MATCH_YES
)
5562 /* Make changes to the symbol. */
5565 if (!gfc_add_function (&sym
->attr
, sym
->name
, NULL
))
5568 if (!gfc_missing_attr (&sym
->attr
, NULL
)
5569 || !copy_prefix (&sym
->attr
, &sym
->declared_at
))
5572 /* Delay matching the function characteristics until after the
5573 specification block by signalling kind=-1. */
5574 sym
->declared_at
= old_loc
;
5575 if (current_ts
.type
!= BT_UNKNOWN
)
5576 current_ts
.kind
= -1;
5578 current_ts
.kind
= 0;
5582 if (current_ts
.type
!= BT_UNKNOWN
5583 && !gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
))
5589 if (current_ts
.type
!= BT_UNKNOWN
5590 && !gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
))
5592 sym
->result
= result
;
5595 /* Warn if this procedure has the same name as an intrinsic. */
5596 do_warn_intrinsic_shadow (sym
, true);
5602 gfc_current_locus
= old_loc
;
5607 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
5608 pass the name of the entry, rather than the gfc_current_block name, and
5609 to return false upon finding an existing global entry. */
5612 add_global_entry (const char *name
, const char *binding_label
, bool sub
,
5616 enum gfc_symbol_type type
;
5618 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
5620 /* Only in Fortran 2003: For procedures with a binding label also the Fortran
5621 name is a global identifier. */
5622 if (!binding_label
|| gfc_notification_std (GFC_STD_F2008
))
5624 s
= gfc_get_gsymbol (name
);
5626 if (s
->defined
|| (s
->type
!= GSYM_UNKNOWN
&& s
->type
!= type
))
5628 gfc_global_used (s
, where
);
5637 s
->ns
= gfc_current_ns
;
5641 /* Don't add the symbol multiple times. */
5643 && (!gfc_notification_std (GFC_STD_F2008
)
5644 || strcmp (name
, binding_label
) != 0))
5646 s
= gfc_get_gsymbol (binding_label
);
5648 if (s
->defined
|| (s
->type
!= GSYM_UNKNOWN
&& s
->type
!= type
))
5650 gfc_global_used (s
, where
);
5657 s
->binding_label
= binding_label
;
5660 s
->ns
= gfc_current_ns
;
5668 /* Match an ENTRY statement. */
5671 gfc_match_entry (void)
5676 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5677 gfc_compile_state state
;
5681 bool module_procedure
;
5685 m
= gfc_match_name (name
);
5689 if (!gfc_notify_std (GFC_STD_F2008_OBS
, "ENTRY statement at %C"))
5692 state
= gfc_current_state ();
5693 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
5698 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
5701 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
5703 case COMP_SUBMODULE
:
5704 gfc_error ("ENTRY statement at %C cannot appear within a SUBMODULE");
5706 case COMP_BLOCK_DATA
:
5707 gfc_error ("ENTRY statement at %C cannot appear within "
5710 case COMP_INTERFACE
:
5711 gfc_error ("ENTRY statement at %C cannot appear within "
5715 gfc_error ("ENTRY statement at %C cannot appear within "
5716 "a DERIVED TYPE block");
5719 gfc_error ("ENTRY statement at %C cannot appear within "
5720 "an IF-THEN block");
5723 case COMP_DO_CONCURRENT
:
5724 gfc_error ("ENTRY statement at %C cannot appear within "
5728 gfc_error ("ENTRY statement at %C cannot appear within "
5732 gfc_error ("ENTRY statement at %C cannot appear within "
5736 gfc_error ("ENTRY statement at %C cannot appear within "
5740 gfc_error ("ENTRY statement at %C cannot appear within "
5741 "a contained subprogram");
5744 gfc_error ("Unexpected ENTRY statement at %C");
5749 module_procedure
= gfc_current_ns
->parent
!= NULL
5750 && gfc_current_ns
->parent
->proc_name
5751 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
5754 if (gfc_current_ns
->parent
!= NULL
5755 && gfc_current_ns
->parent
->proc_name
5756 && !module_procedure
)
5758 gfc_error("ENTRY statement at %C cannot appear in a "
5759 "contained procedure");
5763 /* Module function entries need special care in get_proc_name
5764 because previous references within the function will have
5765 created symbols attached to the current namespace. */
5766 if (get_proc_name (name
, &entry
,
5767 gfc_current_ns
->parent
!= NULL
5768 && module_procedure
))
5771 proc
= gfc_current_block ();
5773 /* Make sure that it isn't already declared as BIND(C). If it is, it
5774 must have been marked BIND(C) with a BIND(C) attribute and that is
5775 not allowed for procedures. */
5776 if (entry
->attr
.is_bind_c
== 1)
5778 entry
->attr
.is_bind_c
= 0;
5779 if (entry
->old_symbol
!= NULL
)
5780 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5781 "variables or common blocks",
5782 &(entry
->old_symbol
->declared_at
));
5784 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5785 "variables or common blocks", &gfc_current_locus
);
5788 /* Check what next non-whitespace character is so we can tell if there
5789 is the required parens if we have a BIND(C). */
5790 old_loc
= gfc_current_locus
;
5791 gfc_gobble_whitespace ();
5792 peek_char
= gfc_peek_ascii_char ();
5794 if (state
== COMP_SUBROUTINE
)
5796 m
= gfc_match_formal_arglist (entry
, 0, 1);
5800 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5801 never be an internal procedure. */
5802 is_bind_c
= gfc_match_bind_c (entry
, true);
5803 if (is_bind_c
== MATCH_ERROR
)
5805 if (is_bind_c
== MATCH_YES
)
5807 if (peek_char
!= '(')
5809 gfc_error ("Missing required parentheses before BIND(C) at %C");
5812 if (!gfc_add_is_bind_c (&(entry
->attr
), entry
->name
,
5813 &(entry
->declared_at
), 1))
5817 if (!gfc_current_ns
->parent
5818 && !add_global_entry (name
, entry
->binding_label
, true,
5822 /* An entry in a subroutine. */
5823 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5824 || !gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
))
5829 /* An entry in a function.
5830 We need to take special care because writing
5835 ENTRY f() RESULT (r)
5837 ENTRY f RESULT (r). */
5838 if (gfc_match_eos () == MATCH_YES
)
5840 gfc_current_locus
= old_loc
;
5841 /* Match the empty argument list, and add the interface to
5843 m
= gfc_match_formal_arglist (entry
, 0, 1);
5846 m
= gfc_match_formal_arglist (entry
, 0, 0);
5853 if (gfc_match_eos () == MATCH_YES
)
5855 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5856 || !gfc_add_function (&entry
->attr
, entry
->name
, NULL
))
5859 entry
->result
= entry
;
5863 m
= gfc_match_suffix (entry
, &result
);
5865 gfc_syntax_error (ST_ENTRY
);
5871 if (!gfc_add_result (&result
->attr
, result
->name
, NULL
)
5872 || !gfc_add_entry (&entry
->attr
, result
->name
, NULL
)
5873 || !gfc_add_function (&entry
->attr
, result
->name
, NULL
))
5875 entry
->result
= result
;
5879 if (!gfc_add_entry (&entry
->attr
, entry
->name
, NULL
)
5880 || !gfc_add_function (&entry
->attr
, entry
->name
, NULL
))
5882 entry
->result
= entry
;
5886 if (!gfc_current_ns
->parent
5887 && !add_global_entry (name
, entry
->binding_label
, false,
5892 if (gfc_match_eos () != MATCH_YES
)
5894 gfc_syntax_error (ST_ENTRY
);
5898 entry
->attr
.recursive
= proc
->attr
.recursive
;
5899 entry
->attr
.elemental
= proc
->attr
.elemental
;
5900 entry
->attr
.pure
= proc
->attr
.pure
;
5902 el
= gfc_get_entry_list ();
5904 el
->next
= gfc_current_ns
->entries
;
5905 gfc_current_ns
->entries
= el
;
5907 el
->id
= el
->next
->id
+ 1;
5911 new_st
.op
= EXEC_ENTRY
;
5912 new_st
.ext
.entry
= el
;
5918 /* Match a subroutine statement, including optional prefixes. */
5921 gfc_match_subroutine (void)
5923 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5928 bool allow_binding_name
;
5930 if (gfc_current_state () != COMP_NONE
5931 && gfc_current_state () != COMP_INTERFACE
5932 && gfc_current_state () != COMP_CONTAINS
)
5935 m
= gfc_match_prefix (NULL
);
5939 m
= gfc_match ("subroutine% %n", name
);
5943 if (get_proc_name (name
, &sym
, false))
5946 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5947 the symbol existed before. */
5948 sym
->declared_at
= gfc_current_locus
;
5950 if (current_attr
.module_procedure
)
5951 sym
->attr
.module_procedure
= 1;
5953 if (add_hidden_procptr_result (sym
))
5956 gfc_new_block
= sym
;
5958 /* Check what next non-whitespace character is so we can tell if there
5959 is the required parens if we have a BIND(C). */
5960 gfc_gobble_whitespace ();
5961 peek_char
= gfc_peek_ascii_char ();
5963 if (!gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
))
5966 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5969 /* Make sure that it isn't already declared as BIND(C). If it is, it
5970 must have been marked BIND(C) with a BIND(C) attribute and that is
5971 not allowed for procedures. */
5972 if (sym
->attr
.is_bind_c
== 1)
5974 sym
->attr
.is_bind_c
= 0;
5975 if (sym
->old_symbol
!= NULL
)
5976 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5977 "variables or common blocks",
5978 &(sym
->old_symbol
->declared_at
));
5980 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5981 "variables or common blocks", &gfc_current_locus
);
5984 /* C binding names are not allowed for internal procedures. */
5985 if (gfc_current_state () == COMP_CONTAINS
5986 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5987 allow_binding_name
= false;
5989 allow_binding_name
= true;
5991 /* Here, we are just checking if it has the bind(c) attribute, and if
5992 so, then we need to make sure it's all correct. If it doesn't,
5993 we still need to continue matching the rest of the subroutine line. */
5994 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5995 if (is_bind_c
== MATCH_ERROR
)
5997 /* There was an attempt at the bind(c), but it was wrong. An
5998 error message should have been printed w/in the gfc_match_bind_c
5999 so here we'll just return the MATCH_ERROR. */
6003 if (is_bind_c
== MATCH_YES
)
6005 /* The following is allowed in the Fortran 2008 draft. */
6006 if (gfc_current_state () == COMP_CONTAINS
6007 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
6008 && !gfc_notify_std (GFC_STD_F2008
, "BIND(C) attribute "
6009 "at %L may not be specified for an internal "
6010 "procedure", &gfc_current_locus
))
6013 if (peek_char
!= '(')
6015 gfc_error ("Missing required parentheses before BIND(C) at %C");
6018 if (!gfc_add_is_bind_c (&(sym
->attr
), sym
->name
,
6019 &(sym
->declared_at
), 1))
6023 if (gfc_match_eos () != MATCH_YES
)
6025 gfc_syntax_error (ST_SUBROUTINE
);
6029 if (!copy_prefix (&sym
->attr
, &sym
->declared_at
))
6032 /* Warn if it has the same name as an intrinsic. */
6033 do_warn_intrinsic_shadow (sym
, false);
6039 /* Check that the NAME identifier in a BIND attribute or statement
6040 is conform to C identifier rules. */
6043 check_bind_name_identifier (char **name
)
6045 char *n
= *name
, *p
;
6047 /* Remove leading spaces. */
6051 /* On an empty string, free memory and set name to NULL. */
6059 /* Remove trailing spaces. */
6060 p
= n
+ strlen(n
) - 1;
6064 /* Insert the identifier into the symbol table. */
6069 /* Now check that identifier is valid under C rules. */
6072 gfc_error ("Invalid C identifier in NAME= specifier at %C");
6077 if (!(ISALNUM (*p
) || *p
== '_' || *p
== '$'))
6079 gfc_error ("Invalid C identifier in NAME= specifier at %C");
6087 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
6088 given, and set the binding label in either the given symbol (if not
6089 NULL), or in the current_ts. The symbol may be NULL because we may
6090 encounter the BIND(C) before the declaration itself. Return
6091 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
6092 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
6093 or MATCH_YES if the specifier was correct and the binding label and
6094 bind(c) fields were set correctly for the given symbol or the
6095 current_ts. If allow_binding_name is false, no binding name may be
6099 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
6101 char *binding_label
= NULL
;
6104 /* Initialize the flag that specifies whether we encountered a NAME=
6105 specifier or not. */
6106 has_name_equals
= 0;
6108 /* This much we have to be able to match, in this order, if
6109 there is a bind(c) label. */
6110 if (gfc_match (" bind ( c ") != MATCH_YES
)
6113 /* Now see if there is a binding label, or if we've reached the
6114 end of the bind(c) attribute without one. */
6115 if (gfc_match_char (',') == MATCH_YES
)
6117 if (gfc_match (" name = ") != MATCH_YES
)
6119 gfc_error ("Syntax error in NAME= specifier for binding label "
6121 /* should give an error message here */
6125 has_name_equals
= 1;
6127 if (gfc_match_init_expr (&e
) != MATCH_YES
)
6133 if (!gfc_simplify_expr(e
, 0))
6135 gfc_error ("NAME= specifier at %C should be a constant expression");
6140 if (e
->expr_type
!= EXPR_CONSTANT
|| e
->ts
.type
!= BT_CHARACTER
6141 || e
->ts
.kind
!= gfc_default_character_kind
|| e
->rank
!= 0)
6143 gfc_error ("NAME= specifier at %C should be a scalar of "
6144 "default character kind");
6149 // Get a C string from the Fortran string constant
6150 binding_label
= gfc_widechar_to_char (e
->value
.character
.string
,
6151 e
->value
.character
.length
);
6154 // Check that it is valid (old gfc_match_name_C)
6155 if (check_bind_name_identifier (&binding_label
) != MATCH_YES
)
6159 /* Get the required right paren. */
6160 if (gfc_match_char (')') != MATCH_YES
)
6162 gfc_error ("Missing closing paren for binding label at %C");
6166 if (has_name_equals
&& !allow_binding_name
)
6168 gfc_error ("No binding name is allowed in BIND(C) at %C");
6172 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
6174 gfc_error ("For dummy procedure %s, no binding name is "
6175 "allowed in BIND(C) at %C", sym
->name
);
6180 /* Save the binding label to the symbol. If sym is null, we're
6181 probably matching the typespec attributes of a declaration and
6182 haven't gotten the name yet, and therefore, no symbol yet. */
6186 sym
->binding_label
= binding_label
;
6188 curr_binding_label
= binding_label
;
6190 else if (allow_binding_name
)
6192 /* No binding label, but if symbol isn't null, we
6193 can set the label for it here.
6194 If name="" or allow_binding_name is false, no C binding name is
6196 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
6197 sym
->binding_label
= IDENTIFIER_POINTER (get_identifier (sym
->name
));
6200 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
6201 && current_interface
.type
== INTERFACE_ABSTRACT
)
6203 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
6211 /* Return nonzero if we're currently compiling a contained procedure. */
6214 contained_procedure (void)
6216 gfc_state_data
*s
= gfc_state_stack
;
6218 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
6219 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
6225 /* Set the kind of each enumerator. The kind is selected such that it is
6226 interoperable with the corresponding C enumeration type, making
6227 sure that -fshort-enums is honored. */
6232 enumerator_history
*current_history
= NULL
;
6236 if (max_enum
== NULL
|| enum_history
== NULL
)
6239 if (!flag_short_enums
)
6245 kind
= gfc_integer_kinds
[i
++].kind
;
6247 while (kind
< gfc_c_int_kind
6248 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
6251 current_history
= enum_history
;
6252 while (current_history
!= NULL
)
6254 current_history
->sym
->ts
.kind
= kind
;
6255 current_history
= current_history
->next
;
6260 /* Match any of the various end-block statements. Returns the type of
6261 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
6262 and END BLOCK statements cannot be replaced by a single END statement. */
6265 gfc_match_end (gfc_statement
*st
)
6267 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6268 gfc_compile_state state
;
6270 const char *block_name
;
6274 gfc_namespace
*parent_ns
, *ns
, *prev_ns
;
6275 gfc_namespace
**nsp
;
6276 bool abreviated_modproc_decl
;
6278 old_loc
= gfc_current_locus
;
6279 if (gfc_match ("end") != MATCH_YES
)
6282 state
= gfc_current_state ();
6283 block_name
= gfc_current_block () == NULL
6284 ? NULL
: gfc_current_block ()->name
;
6288 case COMP_ASSOCIATE
:
6290 if (!strncmp (block_name
, "block@", strlen("block@")))
6295 case COMP_DERIVED_CONTAINS
:
6296 state
= gfc_state_stack
->previous
->state
;
6297 block_name
= gfc_state_stack
->previous
->sym
== NULL
6298 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
6305 abreviated_modproc_decl
6306 = gfc_current_block ()
6307 && gfc_current_block ()->abr_modproc_decl
;
6313 *st
= ST_END_PROGRAM
;
6314 target
= " program";
6318 case COMP_SUBROUTINE
:
6319 *st
= ST_END_SUBROUTINE
;
6320 if (!abreviated_modproc_decl
)
6321 target
= " subroutine";
6323 target
= " procedure";
6324 eos_ok
= !contained_procedure ();
6328 *st
= ST_END_FUNCTION
;
6329 if (!abreviated_modproc_decl
)
6330 target
= " function";
6332 target
= " procedure";
6333 eos_ok
= !contained_procedure ();
6336 case COMP_BLOCK_DATA
:
6337 *st
= ST_END_BLOCK_DATA
;
6338 target
= " block data";
6343 *st
= ST_END_MODULE
;
6348 case COMP_SUBMODULE
:
6349 *st
= ST_END_SUBMODULE
;
6350 target
= " submodule";
6354 case COMP_INTERFACE
:
6355 *st
= ST_END_INTERFACE
;
6356 target
= " interface";
6361 case COMP_DERIVED_CONTAINS
:
6367 case COMP_ASSOCIATE
:
6368 *st
= ST_END_ASSOCIATE
;
6369 target
= " associate";
6386 case COMP_DO_CONCURRENT
:
6393 *st
= ST_END_CRITICAL
;
6394 target
= " critical";
6399 case COMP_SELECT_TYPE
:
6400 *st
= ST_END_SELECT
;
6406 *st
= ST_END_FORALL
;
6421 last_initializer
= NULL
;
6423 gfc_free_enum_history ();
6427 gfc_error ("Unexpected END statement at %C");
6431 old_loc
= gfc_current_locus
;
6432 if (gfc_match_eos () == MATCH_YES
)
6434 if (!eos_ok
&& (*st
== ST_END_SUBROUTINE
|| *st
== ST_END_FUNCTION
))
6436 if (!gfc_notify_std (GFC_STD_F2008
, "END statement "
6437 "instead of %s statement at %L",
6438 abreviated_modproc_decl
? "END PROCEDURE"
6439 : gfc_ascii_statement(*st
), &old_loc
))
6444 /* We would have required END [something]. */
6445 gfc_error ("%s statement expected at %L",
6446 gfc_ascii_statement (*st
), &old_loc
);
6453 /* Verify that we've got the sort of end-block that we're expecting. */
6454 if (gfc_match (target
) != MATCH_YES
)
6456 gfc_error ("Expecting %s statement at %L", abreviated_modproc_decl
6457 ? "END PROCEDURE" : gfc_ascii_statement(*st
), &old_loc
);
6461 old_loc
= gfc_current_locus
;
6462 /* If we're at the end, make sure a block name wasn't required. */
6463 if (gfc_match_eos () == MATCH_YES
)
6466 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
6467 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
&& *st
!= ST_END_BLOCK
6468 && *st
!= ST_END_ASSOCIATE
&& *st
!= ST_END_CRITICAL
)
6474 gfc_error ("Expected block name of %qs in %s statement at %L",
6475 block_name
, gfc_ascii_statement (*st
), &old_loc
);
6480 /* END INTERFACE has a special handler for its several possible endings. */
6481 if (*st
== ST_END_INTERFACE
)
6482 return gfc_match_end_interface ();
6484 /* We haven't hit the end of statement, so what is left must be an
6486 m
= gfc_match_space ();
6488 m
= gfc_match_name (name
);
6491 gfc_error ("Expected terminating name at %C");
6495 if (block_name
== NULL
)
6498 /* We have to pick out the declared submodule name from the composite
6499 required by F2008:11.2.3 para 2, which ends in the declared name. */
6500 if (state
== COMP_SUBMODULE
)
6501 block_name
= strchr (block_name
, '.') + 1;
6503 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
6505 gfc_error ("Expected label %qs for %s statement at %C", block_name
,
6506 gfc_ascii_statement (*st
));
6509 /* Procedure pointer as function result. */
6510 else if (strcmp (block_name
, "ppr@") == 0
6511 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
6513 gfc_error ("Expected label %qs for %s statement at %C",
6514 gfc_current_block ()->ns
->proc_name
->name
,
6515 gfc_ascii_statement (*st
));
6519 if (gfc_match_eos () == MATCH_YES
)
6523 gfc_syntax_error (*st
);
6526 gfc_current_locus
= old_loc
;
6528 /* If we are missing an END BLOCK, we created a half-ready namespace.
6529 Remove it from the parent namespace's sibling list. */
6531 while (state
== COMP_BLOCK
)
6533 parent_ns
= gfc_current_ns
->parent
;
6535 nsp
= &(gfc_state_stack
->previous
->tail
->ext
.block
.ns
);
6541 if (ns
== gfc_current_ns
)
6543 if (prev_ns
== NULL
)
6546 prev_ns
->sibling
= ns
->sibling
;
6552 gfc_free_namespace (gfc_current_ns
);
6553 gfc_current_ns
= parent_ns
;
6554 gfc_state_stack
= gfc_state_stack
->previous
;
6555 state
= gfc_current_state ();
6563 /***************** Attribute declaration statements ****************/
6565 /* Set the attribute of a single variable. */
6570 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6573 /* Workaround -Wmaybe-uninitialized false positive during
6574 profiledbootstrap by initializing them. */
6575 gfc_symbol
*sym
= NULL
;
6581 m
= gfc_match_name (name
);
6585 if (find_special (name
, &sym
, false))
6588 if (!check_function_name (name
))
6594 var_locus
= gfc_current_locus
;
6596 /* Deal with possible array specification for certain attributes. */
6597 if (current_attr
.dimension
6598 || current_attr
.codimension
6599 || current_attr
.allocatable
6600 || current_attr
.pointer
6601 || current_attr
.target
)
6603 m
= gfc_match_array_spec (&as
, !current_attr
.codimension
,
6604 !current_attr
.dimension
6605 && !current_attr
.pointer
6606 && !current_attr
.target
);
6607 if (m
== MATCH_ERROR
)
6610 if (current_attr
.dimension
&& m
== MATCH_NO
)
6612 gfc_error ("Missing array specification at %L in DIMENSION "
6613 "statement", &var_locus
);
6618 if (current_attr
.dimension
&& sym
->value
)
6620 gfc_error ("Dimensions specified for %s at %L after its "
6621 "initialisation", sym
->name
, &var_locus
);
6626 if (current_attr
.codimension
&& m
== MATCH_NO
)
6628 gfc_error ("Missing array specification at %L in CODIMENSION "
6629 "statement", &var_locus
);
6634 if ((current_attr
.allocatable
|| current_attr
.pointer
)
6635 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
6637 gfc_error ("Array specification must be deferred at %L", &var_locus
);
6643 /* Update symbol table. DIMENSION attribute is set in
6644 gfc_set_array_spec(). For CLASS variables, this must be applied
6645 to the first component, or '_data' field. */
6646 if (sym
->ts
.type
== BT_CLASS
&& sym
->ts
.u
.derived
->attr
.is_class
)
6648 if (!gfc_copy_attr (&CLASS_DATA(sym
)->attr
, ¤t_attr
, &var_locus
))
6656 if (current_attr
.dimension
== 0 && current_attr
.codimension
== 0
6657 && !gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
))
6664 if (sym
->ts
.type
== BT_CLASS
6665 && !gfc_build_class_symbol (&sym
->ts
, &sym
->attr
, &sym
->as
))
6671 if (!gfc_set_array_spec (sym
, as
, &var_locus
))
6677 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
6679 /* Fix the array spec. */
6680 m
= gfc_mod_pointee_as (sym
->as
);
6681 if (m
== MATCH_ERROR
)
6685 if (!gfc_add_attribute (&sym
->attr
, &var_locus
))
6691 if ((current_attr
.external
|| current_attr
.intrinsic
)
6692 && sym
->attr
.flavor
!= FL_PROCEDURE
6693 && !gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
))
6699 add_hidden_procptr_result (sym
);
6704 gfc_free_array_spec (as
);
6709 /* Generic attribute declaration subroutine. Used for attributes that
6710 just have a list of names. */
6717 /* Gobble the optional double colon, by simply ignoring the result
6727 if (gfc_match_eos () == MATCH_YES
)
6733 if (gfc_match_char (',') != MATCH_YES
)
6735 gfc_error ("Unexpected character in variable list at %C");
6745 /* This routine matches Cray Pointer declarations of the form:
6746 pointer ( <pointer>, <pointee> )
6748 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
6749 The pointer, if already declared, should be an integer. Otherwise, we
6750 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
6751 be either a scalar, or an array declaration. No space is allocated for
6752 the pointee. For the statement
6753 pointer (ipt, ar(10))
6754 any subsequent uses of ar will be translated (in C-notation) as
6755 ar(i) => ((<type> *) ipt)(i)
6756 After gimplification, pointee variable will disappear in the code. */
6759 cray_pointer_decl (void)
6762 gfc_array_spec
*as
= NULL
;
6763 gfc_symbol
*cptr
; /* Pointer symbol. */
6764 gfc_symbol
*cpte
; /* Pointee symbol. */
6770 if (gfc_match_char ('(') != MATCH_YES
)
6772 gfc_error ("Expected %<(%> at %C");
6776 /* Match pointer. */
6777 var_locus
= gfc_current_locus
;
6778 gfc_clear_attr (¤t_attr
);
6779 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
6780 current_ts
.type
= BT_INTEGER
;
6781 current_ts
.kind
= gfc_index_integer_kind
;
6783 m
= gfc_match_symbol (&cptr
, 0);
6786 gfc_error ("Expected variable name at %C");
6790 if (!gfc_add_cray_pointer (&cptr
->attr
, &var_locus
))
6793 gfc_set_sym_referenced (cptr
);
6795 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
6797 cptr
->ts
.type
= BT_INTEGER
;
6798 cptr
->ts
.kind
= gfc_index_integer_kind
;
6800 else if (cptr
->ts
.type
!= BT_INTEGER
)
6802 gfc_error ("Cray pointer at %C must be an integer");
6805 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
6806 gfc_warning (0, "Cray pointer at %C has %d bytes of precision;"
6807 " memory addresses require %d bytes",
6808 cptr
->ts
.kind
, gfc_index_integer_kind
);
6810 if (gfc_match_char (',') != MATCH_YES
)
6812 gfc_error ("Expected \",\" at %C");
6816 /* Match Pointee. */
6817 var_locus
= gfc_current_locus
;
6818 gfc_clear_attr (¤t_attr
);
6819 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
6820 current_ts
.type
= BT_UNKNOWN
;
6821 current_ts
.kind
= 0;
6823 m
= gfc_match_symbol (&cpte
, 0);
6826 gfc_error ("Expected variable name at %C");
6830 /* Check for an optional array spec. */
6831 m
= gfc_match_array_spec (&as
, true, false);
6832 if (m
== MATCH_ERROR
)
6834 gfc_free_array_spec (as
);
6837 else if (m
== MATCH_NO
)
6839 gfc_free_array_spec (as
);
6843 if (!gfc_add_cray_pointee (&cpte
->attr
, &var_locus
))
6846 gfc_set_sym_referenced (cpte
);
6848 if (cpte
->as
== NULL
)
6850 if (!gfc_set_array_spec (cpte
, as
, &var_locus
))
6851 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6853 else if (as
!= NULL
)
6855 gfc_error ("Duplicate array spec for Cray pointee at %C");
6856 gfc_free_array_spec (as
);
6862 if (cpte
->as
!= NULL
)
6864 /* Fix array spec. */
6865 m
= gfc_mod_pointee_as (cpte
->as
);
6866 if (m
== MATCH_ERROR
)
6870 /* Point the Pointee at the Pointer. */
6871 cpte
->cp_pointer
= cptr
;
6873 if (gfc_match_char (')') != MATCH_YES
)
6875 gfc_error ("Expected \")\" at %C");
6878 m
= gfc_match_char (',');
6880 done
= true; /* Stop searching for more declarations. */
6884 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
6885 || gfc_match_eos () != MATCH_YES
)
6887 gfc_error ("Expected %<,%> or end of statement at %C");
6895 gfc_match_external (void)
6898 gfc_clear_attr (¤t_attr
);
6899 current_attr
.external
= 1;
6901 return attr_decl ();
6906 gfc_match_intent (void)
6910 /* This is not allowed within a BLOCK construct! */
6911 if (gfc_current_state () == COMP_BLOCK
)
6913 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6917 intent
= match_intent_spec ();
6918 if (intent
== INTENT_UNKNOWN
)
6921 gfc_clear_attr (¤t_attr
);
6922 current_attr
.intent
= intent
;
6924 return attr_decl ();
6929 gfc_match_intrinsic (void)
6932 gfc_clear_attr (¤t_attr
);
6933 current_attr
.intrinsic
= 1;
6935 return attr_decl ();
6940 gfc_match_optional (void)
6942 /* This is not allowed within a BLOCK construct! */
6943 if (gfc_current_state () == COMP_BLOCK
)
6945 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6949 gfc_clear_attr (¤t_attr
);
6950 current_attr
.optional
= 1;
6952 return attr_decl ();
6957 gfc_match_pointer (void)
6959 gfc_gobble_whitespace ();
6960 if (gfc_peek_ascii_char () == '(')
6962 if (!flag_cray_pointer
)
6964 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6968 return cray_pointer_decl ();
6972 gfc_clear_attr (¤t_attr
);
6973 current_attr
.pointer
= 1;
6975 return attr_decl ();
6981 gfc_match_allocatable (void)
6983 gfc_clear_attr (¤t_attr
);
6984 current_attr
.allocatable
= 1;
6986 return attr_decl ();
6991 gfc_match_codimension (void)
6993 gfc_clear_attr (¤t_attr
);
6994 current_attr
.codimension
= 1;
6996 return attr_decl ();
7001 gfc_match_contiguous (void)
7003 if (!gfc_notify_std (GFC_STD_F2008
, "CONTIGUOUS statement at %C"))
7006 gfc_clear_attr (¤t_attr
);
7007 current_attr
.contiguous
= 1;
7009 return attr_decl ();
7014 gfc_match_dimension (void)
7016 gfc_clear_attr (¤t_attr
);
7017 current_attr
.dimension
= 1;
7019 return attr_decl ();
7024 gfc_match_target (void)
7026 gfc_clear_attr (¤t_attr
);
7027 current_attr
.target
= 1;
7029 return attr_decl ();
7033 /* Match the list of entities being specified in a PUBLIC or PRIVATE
7037 access_attr_decl (gfc_statement st
)
7039 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7040 interface_type type
;
7042 gfc_symbol
*sym
, *dt_sym
;
7043 gfc_intrinsic_op op
;
7046 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7051 m
= gfc_match_generic_spec (&type
, name
, &op
);
7054 if (m
== MATCH_ERROR
)
7059 case INTERFACE_NAMELESS
:
7060 case INTERFACE_ABSTRACT
:
7063 case INTERFACE_GENERIC
:
7064 if (gfc_get_symbol (name
, NULL
, &sym
))
7067 if (!gfc_add_access (&sym
->attr
,
7069 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
7073 if (sym
->attr
.generic
&& (dt_sym
= gfc_find_dt_in_generic (sym
))
7074 && !gfc_add_access (&dt_sym
->attr
,
7076 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
7082 case INTERFACE_INTRINSIC_OP
:
7083 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
7085 gfc_intrinsic_op other_op
;
7087 gfc_current_ns
->operator_access
[op
] =
7088 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
7090 /* Handle the case if there is another op with the same
7091 function, for INTRINSIC_EQ vs. INTRINSIC_EQ_OS and so on. */
7092 other_op
= gfc_equivalent_op (op
);
7094 if (other_op
!= INTRINSIC_NONE
)
7095 gfc_current_ns
->operator_access
[other_op
] =
7096 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
7101 gfc_error ("Access specification of the %s operator at %C has "
7102 "already been specified", gfc_op2string (op
));
7108 case INTERFACE_USER_OP
:
7109 uop
= gfc_get_uop (name
);
7111 if (uop
->access
== ACCESS_UNKNOWN
)
7113 uop
->access
= (st
== ST_PUBLIC
)
7114 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
7118 gfc_error ("Access specification of the .%s. operator at %C "
7119 "has already been specified", sym
->name
);
7126 if (gfc_match_char (',') == MATCH_NO
)
7130 if (gfc_match_eos () != MATCH_YES
)
7135 gfc_syntax_error (st
);
7143 gfc_match_protected (void)
7148 if (!gfc_current_ns
->proc_name
7149 || gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
7151 gfc_error ("PROTECTED at %C only allowed in specification "
7152 "part of a module");
7157 if (!gfc_notify_std (GFC_STD_F2003
, "PROTECTED statement at %C"))
7160 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7165 if (gfc_match_eos () == MATCH_YES
)
7170 m
= gfc_match_symbol (&sym
, 0);
7174 if (!gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7186 if (gfc_match_eos () == MATCH_YES
)
7188 if (gfc_match_char (',') != MATCH_YES
)
7195 gfc_error ("Syntax error in PROTECTED statement at %C");
7200 /* The PRIVATE statement is a bit weird in that it can be an attribute
7201 declaration, but also works as a standalone statement inside of a
7202 type declaration or a module. */
7205 gfc_match_private (gfc_statement
*st
)
7208 if (gfc_match ("private") != MATCH_YES
)
7211 if (gfc_current_state () != COMP_MODULE
7212 && !(gfc_current_state () == COMP_DERIVED
7213 && gfc_state_stack
->previous
7214 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
7215 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
7216 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
7217 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
7219 gfc_error ("PRIVATE statement at %C is only allowed in the "
7220 "specification part of a module");
7224 if (gfc_current_state () == COMP_DERIVED
)
7226 if (gfc_match_eos () == MATCH_YES
)
7232 gfc_syntax_error (ST_PRIVATE
);
7236 if (gfc_match_eos () == MATCH_YES
)
7243 return access_attr_decl (ST_PRIVATE
);
7248 gfc_match_public (gfc_statement
*st
)
7251 if (gfc_match ("public") != MATCH_YES
)
7254 if (gfc_current_state () != COMP_MODULE
)
7256 gfc_error ("PUBLIC statement at %C is only allowed in the "
7257 "specification part of a module");
7261 if (gfc_match_eos () == MATCH_YES
)
7268 return access_attr_decl (ST_PUBLIC
);
7272 /* Workhorse for gfc_match_parameter. */
7282 m
= gfc_match_symbol (&sym
, 0);
7284 gfc_error ("Expected variable name at %C in PARAMETER statement");
7289 if (gfc_match_char ('=') == MATCH_NO
)
7291 gfc_error ("Expected = sign in PARAMETER statement at %C");
7295 m
= gfc_match_init_expr (&init
);
7297 gfc_error ("Expected expression at %C in PARAMETER statement");
7301 if (sym
->ts
.type
== BT_UNKNOWN
7302 && !gfc_set_default_type (sym
, 1, NULL
))
7308 if (!gfc_check_assign_symbol (sym
, NULL
, init
)
7309 || !gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
))
7317 gfc_error ("Initializing already initialized variable at %C");
7322 t
= add_init_expr_to_sym (sym
->name
, &init
, &gfc_current_locus
);
7323 return (t
) ? MATCH_YES
: MATCH_ERROR
;
7326 gfc_free_expr (init
);
7331 /* Match a parameter statement, with the weird syntax that these have. */
7334 gfc_match_parameter (void)
7338 if (gfc_match_char ('(') == MATCH_NO
)
7347 if (gfc_match (" )%t") == MATCH_YES
)
7350 if (gfc_match_char (',') != MATCH_YES
)
7352 gfc_error ("Unexpected characters in PARAMETER statement at %C");
7362 /* Save statements have a special syntax. */
7365 gfc_match_save (void)
7367 char n
[GFC_MAX_SYMBOL_LEN
+1];
7372 if (gfc_match_eos () == MATCH_YES
)
7374 if (gfc_current_ns
->seen_save
)
7376 if (!gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
7377 "follows previous SAVE statement"))
7381 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
7385 if (gfc_current_ns
->save_all
)
7387 if (!gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
7388 "blanket SAVE statement"))
7396 m
= gfc_match_symbol (&sym
, 0);
7400 if (!gfc_add_save (&sym
->attr
, SAVE_EXPLICIT
, sym
->name
,
7401 &gfc_current_locus
))
7412 m
= gfc_match (" / %n /", &n
);
7413 if (m
== MATCH_ERROR
)
7418 c
= gfc_get_common (n
, 0);
7421 gfc_current_ns
->seen_save
= 1;
7424 if (gfc_match_eos () == MATCH_YES
)
7426 if (gfc_match_char (',') != MATCH_YES
)
7433 gfc_error ("Syntax error in SAVE statement at %C");
7439 gfc_match_value (void)
7444 /* This is not allowed within a BLOCK construct! */
7445 if (gfc_current_state () == COMP_BLOCK
)
7447 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
7451 if (!gfc_notify_std (GFC_STD_F2003
, "VALUE statement at %C"))
7454 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7459 if (gfc_match_eos () == MATCH_YES
)
7464 m
= gfc_match_symbol (&sym
, 0);
7468 if (!gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7480 if (gfc_match_eos () == MATCH_YES
)
7482 if (gfc_match_char (',') != MATCH_YES
)
7489 gfc_error ("Syntax error in VALUE statement at %C");
7495 gfc_match_volatile (void)
7500 if (!gfc_notify_std (GFC_STD_F2003
, "VOLATILE statement at %C"))
7503 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7508 if (gfc_match_eos () == MATCH_YES
)
7513 /* VOLATILE is special because it can be added to host-associated
7514 symbols locally. Except for coarrays. */
7515 m
= gfc_match_symbol (&sym
, 1);
7519 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
7520 for variable in a BLOCK which is defined outside of the BLOCK. */
7521 if (sym
->ns
!= gfc_current_ns
&& sym
->attr
.codimension
)
7523 gfc_error ("Specifying VOLATILE for coarray variable %qs at "
7524 "%C, which is use-/host-associated", sym
->name
);
7527 if (!gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7539 if (gfc_match_eos () == MATCH_YES
)
7541 if (gfc_match_char (',') != MATCH_YES
)
7548 gfc_error ("Syntax error in VOLATILE statement at %C");
7554 gfc_match_asynchronous (void)
7559 if (!gfc_notify_std (GFC_STD_F2003
, "ASYNCHRONOUS statement at %C"))
7562 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
7567 if (gfc_match_eos () == MATCH_YES
)
7572 /* ASYNCHRONOUS is special because it can be added to host-associated
7574 m
= gfc_match_symbol (&sym
, 1);
7578 if (!gfc_add_asynchronous (&sym
->attr
, sym
->name
, &gfc_current_locus
))
7590 if (gfc_match_eos () == MATCH_YES
)
7592 if (gfc_match_char (',') != MATCH_YES
)
7599 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
7604 /* Match a module procedure statement in a submodule. */
7607 gfc_match_submod_proc (void)
7609 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7610 gfc_symbol
*sym
, *fsym
;
7612 gfc_formal_arglist
*formal
, *head
, *tail
;
7614 if (gfc_current_state () != COMP_CONTAINS
7615 || !(gfc_state_stack
->previous
7616 && gfc_state_stack
->previous
->state
== COMP_SUBMODULE
))
7619 m
= gfc_match (" module% procedure% %n", name
);
7623 if (!gfc_notify_std (GFC_STD_F2008
, "MODULE PROCEDURE declaration "
7627 if (get_proc_name (name
, &sym
, false))
7630 /* Make sure that the result field is appropriately filled, even though
7631 the result symbol will be replaced later on. */
7632 if (sym
->ts
.interface
->attr
.function
)
7634 if (sym
->ts
.interface
->result
7635 && sym
->ts
.interface
->result
!= sym
->ts
.interface
)
7636 sym
->result
= sym
->ts
.interface
->result
;
7641 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
7642 the symbol existed before. */
7643 sym
->declared_at
= gfc_current_locus
;
7645 if (!sym
->attr
.module_procedure
)
7648 /* Signal match_end to expect "end procedure". */
7649 sym
->abr_modproc_decl
= 1;
7651 /* Change from IFSRC_IFBODY coming from the interface declaration. */
7652 sym
->attr
.if_source
= IFSRC_DECL
;
7654 gfc_new_block
= sym
;
7656 /* Make a new formal arglist with the symbols in the procedure
7659 for (formal
= sym
->formal
; formal
&& formal
->sym
; formal
= formal
->next
)
7661 if (formal
== sym
->formal
)
7662 head
= tail
= gfc_get_formal_arglist ();
7665 tail
->next
= gfc_get_formal_arglist ();
7669 if (gfc_copy_dummy_sym (&fsym
, formal
->sym
, 0))
7673 gfc_set_sym_referenced (fsym
);
7676 /* The dummy symbols get cleaned up, when the formal_namespace of the
7677 interface declaration is cleared. This allows us to add the
7678 explicit interface as is done for other type of procedure. */
7679 if (!gfc_add_explicit_interface (sym
, IFSRC_DECL
, head
,
7680 &gfc_current_locus
))
7683 if (gfc_match_eos () != MATCH_YES
)
7685 gfc_syntax_error (ST_MODULE_PROC
);
7692 gfc_free_formal_arglist (head
);
7697 /* Match a module procedure statement. Note that we have to modify
7698 symbols in the parent's namespace because the current one was there
7699 to receive symbols that are in an interface's formal argument list. */
7702 gfc_match_modproc (void)
7704 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7708 gfc_namespace
*module_ns
;
7709 gfc_interface
*old_interface_head
, *interface
;
7711 if (gfc_state_stack
->state
!= COMP_INTERFACE
7712 || gfc_state_stack
->previous
== NULL
7713 || current_interface
.type
== INTERFACE_NAMELESS
7714 || current_interface
.type
== INTERFACE_ABSTRACT
)
7716 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
7721 module_ns
= gfc_current_ns
->parent
;
7722 for (; module_ns
; module_ns
= module_ns
->parent
)
7723 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
7724 || module_ns
->proc_name
->attr
.flavor
== FL_PROGRAM
7725 || (module_ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
7726 && !module_ns
->proc_name
->attr
.contained
))
7729 if (module_ns
== NULL
)
7732 /* Store the current state of the interface. We will need it if we
7733 end up with a syntax error and need to recover. */
7734 old_interface_head
= gfc_current_interface_head ();
7736 /* Check if the F2008 optional double colon appears. */
7737 gfc_gobble_whitespace ();
7738 old_locus
= gfc_current_locus
;
7739 if (gfc_match ("::") == MATCH_YES
)
7741 if (!gfc_notify_std (GFC_STD_F2008
, "double colon in "
7742 "MODULE PROCEDURE statement at %L", &old_locus
))
7746 gfc_current_locus
= old_locus
;
7751 old_locus
= gfc_current_locus
;
7753 m
= gfc_match_name (name
);
7759 /* Check for syntax error before starting to add symbols to the
7760 current namespace. */
7761 if (gfc_match_eos () == MATCH_YES
)
7764 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7767 /* Now we're sure the syntax is valid, we process this item
7769 if (gfc_get_symbol (name
, module_ns
, &sym
))
7772 if (sym
->attr
.intrinsic
)
7774 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
7775 "PROCEDURE", &old_locus
);
7779 if (sym
->attr
.proc
!= PROC_MODULE
7780 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
7783 if (!gfc_add_interface (sym
))
7786 sym
->attr
.mod_proc
= 1;
7787 sym
->declared_at
= old_locus
;
7796 /* Restore the previous state of the interface. */
7797 interface
= gfc_current_interface_head ();
7798 gfc_set_current_interface_head (old_interface_head
);
7800 /* Free the new interfaces. */
7801 while (interface
!= old_interface_head
)
7803 gfc_interface
*i
= interface
->next
;
7808 /* And issue a syntax error. */
7809 gfc_syntax_error (ST_MODULE_PROC
);
7814 /* Check a derived type that is being extended. */
7817 check_extended_derived_type (char *name
)
7819 gfc_symbol
*extended
;
7821 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
7823 gfc_error ("Ambiguous symbol in TYPE definition at %C");
7827 extended
= gfc_find_dt_in_generic (extended
);
7832 gfc_error ("Symbol %qs at %C has not been previously defined", name
);
7836 if (extended
->attr
.flavor
!= FL_DERIVED
)
7838 gfc_error ("%qs in EXTENDS expression at %C is not a "
7839 "derived type", name
);
7843 if (extended
->attr
.is_bind_c
)
7845 gfc_error ("%qs cannot be extended at %C because it "
7846 "is BIND(C)", extended
->name
);
7850 if (extended
->attr
.sequence
)
7852 gfc_error ("%qs cannot be extended at %C because it "
7853 "is a SEQUENCE type", extended
->name
);
7861 /* Match the optional attribute specifiers for a type declaration.
7862 Return MATCH_ERROR if an error is encountered in one of the handled
7863 attributes (public, private, bind(c)), MATCH_NO if what's found is
7864 not a handled attribute, and MATCH_YES otherwise. TODO: More error
7865 checking on attribute conflicts needs to be done. */
7868 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
7870 /* See if the derived type is marked as private. */
7871 if (gfc_match (" , private") == MATCH_YES
)
7873 if (gfc_current_state () != COMP_MODULE
)
7875 gfc_error ("Derived type at %C can only be PRIVATE in the "
7876 "specification part of a module");
7880 if (!gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
))
7883 else if (gfc_match (" , public") == MATCH_YES
)
7885 if (gfc_current_state () != COMP_MODULE
)
7887 gfc_error ("Derived type at %C can only be PUBLIC in the "
7888 "specification part of a module");
7892 if (!gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
))
7895 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
7897 /* If the type is defined to be bind(c) it then needs to make
7898 sure that all fields are interoperable. This will
7899 need to be a semantic check on the finished derived type.
7900 See 15.2.3 (lines 9-12) of F2003 draft. */
7901 if (!gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0))
7904 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
7906 else if (gfc_match (" , abstract") == MATCH_YES
)
7908 if (!gfc_notify_std (GFC_STD_F2003
, "ABSTRACT type at %C"))
7911 if (!gfc_add_abstract (attr
, &gfc_current_locus
))
7914 else if (name
&& gfc_match (" , extends ( %n )", name
) == MATCH_YES
)
7916 if (!gfc_add_extension (attr
, &gfc_current_locus
))
7922 /* If we get here, something matched. */
7927 /* Match the beginning of a derived type declaration. If a type name
7928 was the result of a function, then it is possible to have a symbol
7929 already to be known as a derived type yet have no components. */
7932 gfc_match_derived_decl (void)
7934 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7935 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
7936 symbol_attribute attr
;
7937 gfc_symbol
*sym
, *gensym
;
7938 gfc_symbol
*extended
;
7940 match is_type_attr_spec
= MATCH_NO
;
7941 bool seen_attr
= false;
7942 gfc_interface
*intr
= NULL
, *head
;
7944 if (gfc_current_state () == COMP_DERIVED
)
7949 gfc_clear_attr (&attr
);
7954 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
7955 if (is_type_attr_spec
== MATCH_ERROR
)
7957 if (is_type_attr_spec
== MATCH_YES
)
7959 } while (is_type_attr_spec
== MATCH_YES
);
7961 /* Deal with derived type extensions. The extension attribute has
7962 been added to 'attr' but now the parent type must be found and
7965 extended
= check_extended_derived_type (parent
);
7967 if (parent
[0] && !extended
)
7970 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
7972 gfc_error ("Expected :: in TYPE definition at %C");
7976 m
= gfc_match (" %n%t", name
);
7980 /* Make sure the name is not the name of an intrinsic type. */
7981 if (gfc_is_intrinsic_typename (name
))
7983 gfc_error ("Type name %qs at %C cannot be the same as an intrinsic "
7988 if (gfc_get_symbol (name
, NULL
, &gensym
))
7991 if (!gensym
->attr
.generic
&& gensym
->ts
.type
!= BT_UNKNOWN
)
7993 gfc_error ("Derived type name %qs at %C already has a basic type "
7994 "of %s", gensym
->name
, gfc_typename (&gensym
->ts
));
7998 if (!gensym
->attr
.generic
7999 && !gfc_add_generic (&gensym
->attr
, gensym
->name
, NULL
))
8002 if (!gensym
->attr
.function
8003 && !gfc_add_function (&gensym
->attr
, gensym
->name
, NULL
))
8006 sym
= gfc_find_dt_in_generic (gensym
);
8008 if (sym
&& (sym
->components
!= NULL
|| sym
->attr
.zero_comp
))
8010 gfc_error ("Derived type definition of %qs at %C has already been "
8011 "defined", sym
->name
);
8017 /* Use upper case to save the actual derived-type symbol. */
8018 gfc_get_symbol (gfc_get_string ("%c%s",
8019 (char) TOUPPER ((unsigned char) gensym
->name
[0]),
8020 &gensym
->name
[1]), NULL
, &sym
);
8021 sym
->name
= gfc_get_string (gensym
->name
);
8022 head
= gensym
->generic
;
8023 intr
= gfc_get_interface ();
8025 intr
->where
= gfc_current_locus
;
8026 intr
->sym
->declared_at
= gfc_current_locus
;
8028 gensym
->generic
= intr
;
8029 gensym
->attr
.if_source
= IFSRC_DECL
;
8032 /* The symbol may already have the derived attribute without the
8033 components. The ways this can happen is via a function
8034 definition, an INTRINSIC statement or a subtype in another
8035 derived type that is a pointer. The first part of the AND clause
8036 is true if the symbol is not the return value of a function. */
8037 if (sym
->attr
.flavor
!= FL_DERIVED
8038 && !gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
))
8041 if (attr
.access
!= ACCESS_UNKNOWN
8042 && !gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
))
8044 else if (sym
->attr
.access
== ACCESS_UNKNOWN
8045 && gensym
->attr
.access
!= ACCESS_UNKNOWN
8046 && !gfc_add_access (&sym
->attr
, gensym
->attr
.access
,
8050 if (sym
->attr
.access
!= ACCESS_UNKNOWN
8051 && gensym
->attr
.access
== ACCESS_UNKNOWN
)
8052 gensym
->attr
.access
= sym
->attr
.access
;
8054 /* See if the derived type was labeled as bind(c). */
8055 if (attr
.is_bind_c
!= 0)
8056 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
8058 /* Construct the f2k_derived namespace if it is not yet there. */
8059 if (!sym
->f2k_derived
)
8060 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
8062 if (extended
&& !sym
->components
)
8066 /* Add the extended derived type as the first component. */
8067 gfc_add_component (sym
, parent
, &p
);
8069 gfc_set_sym_referenced (extended
);
8071 p
->ts
.type
= BT_DERIVED
;
8072 p
->ts
.u
.derived
= extended
;
8073 p
->initializer
= gfc_default_initializer (&p
->ts
);
8075 /* Set extension level. */
8076 if (extended
->attr
.extension
== 255)
8078 /* Since the extension field is 8 bit wide, we can only have
8079 up to 255 extension levels. */
8080 gfc_error ("Maximum extension level reached with type %qs at %L",
8081 extended
->name
, &extended
->declared_at
);
8084 sym
->attr
.extension
= extended
->attr
.extension
+ 1;
8086 /* Provide the links between the extended type and its extension. */
8087 if (!extended
->f2k_derived
)
8088 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
8091 if (!sym
->hash_value
)
8092 /* Set the hash for the compound name for this type. */
8093 sym
->hash_value
= gfc_hash_value (sym
);
8095 /* Take over the ABSTRACT attribute. */
8096 sym
->attr
.abstract
= attr
.abstract
;
8098 gfc_new_block
= sym
;
8104 /* Cray Pointees can be declared as:
8105 pointer (ipt, a (n,m,...,*)) */
8108 gfc_mod_pointee_as (gfc_array_spec
*as
)
8110 as
->cray_pointee
= true; /* This will be useful to know later. */
8111 if (as
->type
== AS_ASSUMED_SIZE
)
8112 as
->cp_was_assumed
= true;
8113 else if (as
->type
== AS_ASSUMED_SHAPE
)
8115 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
8122 /* Match the enum definition statement, here we are trying to match
8123 the first line of enum definition statement.
8124 Returns MATCH_YES if match is found. */
8127 gfc_match_enum (void)
8131 m
= gfc_match_eos ();
8135 if (!gfc_notify_std (GFC_STD_F2003
, "ENUM and ENUMERATOR at %C"))
8142 /* Returns an initializer whose value is one higher than the value of the
8143 LAST_INITIALIZER argument. If the argument is NULL, the
8144 initializers value will be set to zero. The initializer's kind
8145 will be set to gfc_c_int_kind.
8147 If -fshort-enums is given, the appropriate kind will be selected
8148 later after all enumerators have been parsed. A warning is issued
8149 here if an initializer exceeds gfc_c_int_kind. */
8152 enum_initializer (gfc_expr
*last_initializer
, locus where
)
8155 result
= gfc_get_constant_expr (BT_INTEGER
, gfc_c_int_kind
, &where
);
8157 mpz_init (result
->value
.integer
);
8159 if (last_initializer
!= NULL
)
8161 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
8162 result
->where
= last_initializer
->where
;
8164 if (gfc_check_integer_range (result
->value
.integer
,
8165 gfc_c_int_kind
) != ARITH_OK
)
8167 gfc_error ("Enumerator exceeds the C integer type at %C");
8173 /* Control comes here, if it's the very first enumerator and no
8174 initializer has been given. It will be initialized to zero. */
8175 mpz_set_si (result
->value
.integer
, 0);
8182 /* Match a variable name with an optional initializer. When this
8183 subroutine is called, a variable is expected to be parsed next.
8184 Depending on what is happening at the moment, updates either the
8185 symbol table or the current interface. */
8188 enumerator_decl (void)
8190 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8191 gfc_expr
*initializer
;
8192 gfc_array_spec
*as
= NULL
;
8200 old_locus
= gfc_current_locus
;
8202 /* When we get here, we've just matched a list of attributes and
8203 maybe a type and a double colon. The next thing we expect to see
8204 is the name of the symbol. */
8205 m
= gfc_match_name (name
);
8209 var_locus
= gfc_current_locus
;
8211 /* OK, we've successfully matched the declaration. Now put the
8212 symbol in the current namespace. If we fail to create the symbol,
8214 if (!build_sym (name
, NULL
, false, &as
, &var_locus
))
8220 /* The double colon must be present in order to have initializers.
8221 Otherwise the statement is ambiguous with an assignment statement. */
8224 if (gfc_match_char ('=') == MATCH_YES
)
8226 m
= gfc_match_init_expr (&initializer
);
8229 gfc_error ("Expected an initialization expression at %C");
8238 /* If we do not have an initializer, the initialization value of the
8239 previous enumerator (stored in last_initializer) is incremented
8240 by 1 and is used to initialize the current enumerator. */
8241 if (initializer
== NULL
)
8242 initializer
= enum_initializer (last_initializer
, old_locus
);
8244 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
8246 gfc_error ("ENUMERATOR %L not initialized with integer expression",
8252 /* Store this current initializer, for the next enumerator variable
8253 to be parsed. add_init_expr_to_sym() zeros initializer, so we
8254 use last_initializer below. */
8255 last_initializer
= initializer
;
8256 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
8258 /* Maintain enumerator history. */
8259 gfc_find_symbol (name
, NULL
, 0, &sym
);
8260 create_enum_history (sym
, last_initializer
);
8262 return (t
) ? MATCH_YES
: MATCH_ERROR
;
8265 /* Free stuff up and return. */
8266 gfc_free_expr (initializer
);
8272 /* Match the enumerator definition statement. */
8275 gfc_match_enumerator_def (void)
8280 gfc_clear_ts (¤t_ts
);
8282 m
= gfc_match (" enumerator");
8286 m
= gfc_match (" :: ");
8287 if (m
== MATCH_ERROR
)
8290 colon_seen
= (m
== MATCH_YES
);
8292 if (gfc_current_state () != COMP_ENUM
)
8294 gfc_error ("ENUM definition statement expected before %C");
8295 gfc_free_enum_history ();
8299 (¤t_ts
)->type
= BT_INTEGER
;
8300 (¤t_ts
)->kind
= gfc_c_int_kind
;
8302 gfc_clear_attr (¤t_attr
);
8303 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
8312 m
= enumerator_decl ();
8313 if (m
== MATCH_ERROR
)
8315 gfc_free_enum_history ();
8321 if (gfc_match_eos () == MATCH_YES
)
8323 if (gfc_match_char (',') != MATCH_YES
)
8327 if (gfc_current_state () == COMP_ENUM
)
8329 gfc_free_enum_history ();
8330 gfc_error ("Syntax error in ENUMERATOR definition at %C");
8335 gfc_free_array_spec (current_as
);
8342 /* Match binding attributes. */
8345 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
8347 bool found_passing
= false;
8348 bool seen_ptr
= false;
8349 match m
= MATCH_YES
;
8351 /* Initialize to defaults. Do so even before the MATCH_NO check so that in
8352 this case the defaults are in there. */
8353 ba
->access
= ACCESS_UNKNOWN
;
8354 ba
->pass_arg
= NULL
;
8355 ba
->pass_arg_num
= 0;
8357 ba
->non_overridable
= 0;
8361 /* If we find a comma, we believe there are binding attributes. */
8362 m
= gfc_match_char (',');
8368 /* Access specifier. */
8370 m
= gfc_match (" public");
8371 if (m
== MATCH_ERROR
)
8375 if (ba
->access
!= ACCESS_UNKNOWN
)
8377 gfc_error ("Duplicate access-specifier at %C");
8381 ba
->access
= ACCESS_PUBLIC
;
8385 m
= gfc_match (" private");
8386 if (m
== MATCH_ERROR
)
8390 if (ba
->access
!= ACCESS_UNKNOWN
)
8392 gfc_error ("Duplicate access-specifier at %C");
8396 ba
->access
= ACCESS_PRIVATE
;
8400 /* If inside GENERIC, the following is not allowed. */
8405 m
= gfc_match (" nopass");
8406 if (m
== MATCH_ERROR
)
8412 gfc_error ("Binding attributes already specify passing,"
8413 " illegal NOPASS at %C");
8417 found_passing
= true;
8422 /* PASS possibly including argument. */
8423 m
= gfc_match (" pass");
8424 if (m
== MATCH_ERROR
)
8428 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
8432 gfc_error ("Binding attributes already specify passing,"
8433 " illegal PASS at %C");
8437 m
= gfc_match (" ( %n )", arg
);
8438 if (m
== MATCH_ERROR
)
8441 ba
->pass_arg
= gfc_get_string (arg
);
8442 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
8444 found_passing
= true;
8452 m
= gfc_match (" pointer");
8453 if (m
== MATCH_ERROR
)
8459 gfc_error ("Duplicate POINTER attribute at %C");
8469 /* NON_OVERRIDABLE flag. */
8470 m
= gfc_match (" non_overridable");
8471 if (m
== MATCH_ERROR
)
8475 if (ba
->non_overridable
)
8477 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
8481 ba
->non_overridable
= 1;
8485 /* DEFERRED flag. */
8486 m
= gfc_match (" deferred");
8487 if (m
== MATCH_ERROR
)
8493 gfc_error ("Duplicate DEFERRED at %C");
8504 /* Nothing matching found. */
8506 gfc_error ("Expected access-specifier at %C");
8508 gfc_error ("Expected binding attribute at %C");
8511 while (gfc_match_char (',') == MATCH_YES
);
8513 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
8514 if (ba
->non_overridable
&& ba
->deferred
)
8516 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
8523 if (ba
->access
== ACCESS_UNKNOWN
)
8524 ba
->access
= gfc_typebound_default_access
;
8526 if (ppc
&& !seen_ptr
)
8528 gfc_error ("POINTER attribute is required for procedure pointer component"
8540 /* Match a PROCEDURE specific binding inside a derived type. */
8543 match_procedure_in_type (void)
8545 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8546 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
8547 char* target
= NULL
, *ifc
= NULL
;
8548 gfc_typebound_proc tb
;
8557 /* Check current state. */
8558 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
8559 block
= gfc_state_stack
->previous
->sym
;
8562 /* Try to match PROCEDURE(interface). */
8563 if (gfc_match (" (") == MATCH_YES
)
8565 m
= gfc_match_name (target_buf
);
8566 if (m
== MATCH_ERROR
)
8570 gfc_error ("Interface-name expected after %<(%> at %C");
8574 if (gfc_match (" )") != MATCH_YES
)
8576 gfc_error ("%<)%> expected at %C");
8583 /* Construct the data structure. */
8584 memset (&tb
, 0, sizeof (tb
));
8585 tb
.where
= gfc_current_locus
;
8587 /* Match binding attributes. */
8588 m
= match_binding_attributes (&tb
, false, false);
8589 if (m
== MATCH_ERROR
)
8591 seen_attrs
= (m
== MATCH_YES
);
8593 /* Check that attribute DEFERRED is given if an interface is specified. */
8594 if (tb
.deferred
&& !ifc
)
8596 gfc_error ("Interface must be specified for DEFERRED binding at %C");
8599 if (ifc
&& !tb
.deferred
)
8601 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
8605 /* Match the colons. */
8606 m
= gfc_match (" ::");
8607 if (m
== MATCH_ERROR
)
8609 seen_colons
= (m
== MATCH_YES
);
8610 if (seen_attrs
&& !seen_colons
)
8612 gfc_error ("Expected %<::%> after binding-attributes at %C");
8616 /* Match the binding names. */
8619 m
= gfc_match_name (name
);
8620 if (m
== MATCH_ERROR
)
8624 gfc_error ("Expected binding name at %C");
8628 if (num
>1 && !gfc_notify_std (GFC_STD_F2008
, "PROCEDURE list at %C"))
8631 /* Try to match the '=> target', if it's there. */
8633 m
= gfc_match (" =>");
8634 if (m
== MATCH_ERROR
)
8640 gfc_error ("%<=> target%> is invalid for DEFERRED binding at %C");
8646 gfc_error ("%<::%> needed in PROCEDURE binding with explicit target"
8651 m
= gfc_match_name (target_buf
);
8652 if (m
== MATCH_ERROR
)
8656 gfc_error ("Expected binding target after %<=>%> at %C");
8659 target
= target_buf
;
8662 /* If no target was found, it has the same name as the binding. */
8666 /* Get the namespace to insert the symbols into. */
8667 ns
= block
->f2k_derived
;
8670 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
8671 if (tb
.deferred
&& !block
->attr
.abstract
)
8673 gfc_error ("Type %qs containing DEFERRED binding at %C "
8674 "is not ABSTRACT", block
->name
);
8678 /* See if we already have a binding with this name in the symtree which
8679 would be an error. If a GENERIC already targeted this binding, it may
8680 be already there but then typebound is still NULL. */
8681 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
8682 if (stree
&& stree
->n
.tb
)
8684 gfc_error ("There is already a procedure with binding name %qs for "
8685 "the derived type %qs at %C", name
, block
->name
);
8689 /* Insert it and set attributes. */
8693 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
8696 stree
->n
.tb
= gfc_get_typebound_proc (&tb
);
8698 if (gfc_get_sym_tree (target
, gfc_current_ns
, &stree
->n
.tb
->u
.specific
,
8701 gfc_set_sym_referenced (stree
->n
.tb
->u
.specific
->n
.sym
);
8703 if (gfc_match_eos () == MATCH_YES
)
8705 if (gfc_match_char (',') != MATCH_YES
)
8710 gfc_error ("Syntax error in PROCEDURE statement at %C");
8715 /* Match a GENERIC procedure binding inside a derived type. */
8718 gfc_match_generic (void)
8720 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8721 char bind_name
[GFC_MAX_SYMBOL_LEN
+ 16]; /* Allow space for OPERATOR(...). */
8723 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
8724 gfc_typebound_proc
* tb
;
8726 interface_type op_type
;
8727 gfc_intrinsic_op op
;
8730 /* Check current state. */
8731 if (gfc_current_state () == COMP_DERIVED
)
8733 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
8736 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
8738 block
= gfc_state_stack
->previous
->sym
;
8739 ns
= block
->f2k_derived
;
8740 gcc_assert (block
&& ns
);
8742 memset (&tbattr
, 0, sizeof (tbattr
));
8743 tbattr
.where
= gfc_current_locus
;
8745 /* See if we get an access-specifier. */
8746 m
= match_binding_attributes (&tbattr
, true, false);
8747 if (m
== MATCH_ERROR
)
8750 /* Now the colons, those are required. */
8751 if (gfc_match (" ::") != MATCH_YES
)
8753 gfc_error ("Expected %<::%> at %C");
8757 /* Match the binding name; depending on type (operator / generic) format
8758 it for future error messages into bind_name. */
8760 m
= gfc_match_generic_spec (&op_type
, name
, &op
);
8761 if (m
== MATCH_ERROR
)
8765 gfc_error ("Expected generic name or operator descriptor at %C");
8771 case INTERFACE_GENERIC
:
8772 snprintf (bind_name
, sizeof (bind_name
), "%s", name
);
8775 case INTERFACE_USER_OP
:
8776 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(.%s.)", name
);
8779 case INTERFACE_INTRINSIC_OP
:
8780 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(%s)",
8781 gfc_op2string (op
));
8784 case INTERFACE_NAMELESS
:
8785 gfc_error ("Malformed GENERIC statement at %C");
8793 /* Match the required =>. */
8794 if (gfc_match (" =>") != MATCH_YES
)
8796 gfc_error ("Expected %<=>%> at %C");
8800 /* Try to find existing GENERIC binding with this name / for this operator;
8801 if there is something, check that it is another GENERIC and then extend
8802 it rather than building a new node. Otherwise, create it and put it
8803 at the right position. */
8807 case INTERFACE_USER_OP
:
8808 case INTERFACE_GENERIC
:
8810 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8813 st
= gfc_find_symtree (is_op
? ns
->tb_uop_root
: ns
->tb_sym_root
, name
);
8825 case INTERFACE_INTRINSIC_OP
:
8835 if (!tb
->is_generic
)
8837 gcc_assert (op_type
== INTERFACE_GENERIC
);
8838 gfc_error ("There's already a non-generic procedure with binding name"
8839 " %qs for the derived type %qs at %C",
8840 bind_name
, block
->name
);
8844 if (tb
->access
!= tbattr
.access
)
8846 gfc_error ("Binding at %C must have the same access as already"
8847 " defined binding %qs", bind_name
);
8853 tb
= gfc_get_typebound_proc (NULL
);
8854 tb
->where
= gfc_current_locus
;
8855 tb
->access
= tbattr
.access
;
8857 tb
->u
.generic
= NULL
;
8861 case INTERFACE_GENERIC
:
8862 case INTERFACE_USER_OP
:
8864 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
8867 st
= gfc_new_symtree (is_op
? &ns
->tb_uop_root
: &ns
->tb_sym_root
,
8875 case INTERFACE_INTRINSIC_OP
:
8884 /* Now, match all following names as specific targets. */
8887 gfc_symtree
* target_st
;
8888 gfc_tbp_generic
* target
;
8890 m
= gfc_match_name (name
);
8891 if (m
== MATCH_ERROR
)
8895 gfc_error ("Expected specific binding name at %C");
8899 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
8901 /* See if this is a duplicate specification. */
8902 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
8903 if (target_st
== target
->specific_st
)
8905 gfc_error ("%qs already defined as specific binding for the"
8906 " generic %qs at %C", name
, bind_name
);
8910 target
= gfc_get_tbp_generic ();
8911 target
->specific_st
= target_st
;
8912 target
->specific
= NULL
;
8913 target
->next
= tb
->u
.generic
;
8914 target
->is_operator
= ((op_type
== INTERFACE_USER_OP
)
8915 || (op_type
== INTERFACE_INTRINSIC_OP
));
8916 tb
->u
.generic
= target
;
8918 while (gfc_match (" ,") == MATCH_YES
);
8920 /* Here should be the end. */
8921 if (gfc_match_eos () != MATCH_YES
)
8923 gfc_error ("Junk after GENERIC binding at %C");
8934 /* Match a FINAL declaration inside a derived type. */
8937 gfc_match_final_decl (void)
8939 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
8942 gfc_namespace
* module_ns
;
8946 if (gfc_current_form
== FORM_FREE
)
8948 char c
= gfc_peek_ascii_char ();
8949 if (!gfc_is_whitespace (c
) && c
!= ':')
8953 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
8955 if (gfc_current_form
== FORM_FIXED
)
8958 gfc_error ("FINAL declaration at %C must be inside a derived type "
8959 "CONTAINS section");
8963 block
= gfc_state_stack
->previous
->sym
;
8966 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
8967 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
8969 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8970 " specification part of a MODULE");
8974 module_ns
= gfc_current_ns
;
8975 gcc_assert (module_ns
);
8976 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
8978 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8979 if (gfc_match (" ::") == MATCH_ERROR
)
8982 /* Match the sequence of procedure names. */
8989 if (first
&& gfc_match_eos () == MATCH_YES
)
8991 gfc_error ("Empty FINAL at %C");
8995 m
= gfc_match_name (name
);
8998 gfc_error ("Expected module procedure name at %C");
9001 else if (m
!= MATCH_YES
)
9004 if (gfc_match_eos () == MATCH_YES
)
9006 if (!last
&& gfc_match_char (',') != MATCH_YES
)
9008 gfc_error ("Expected %<,%> at %C");
9012 if (gfc_get_symbol (name
, module_ns
, &sym
))
9014 gfc_error ("Unknown procedure name %qs at %C", name
);
9018 /* Mark the symbol as module procedure. */
9019 if (sym
->attr
.proc
!= PROC_MODULE
9020 && !gfc_add_procedure (&sym
->attr
, PROC_MODULE
, sym
->name
, NULL
))
9023 /* Check if we already have this symbol in the list, this is an error. */
9024 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
9025 if (f
->proc_sym
== sym
)
9027 gfc_error ("%qs at %C is already defined as FINAL procedure!",
9032 /* Add this symbol to the list of finalizers. */
9033 gcc_assert (block
->f2k_derived
);
9035 f
= XCNEW (gfc_finalizer
);
9037 f
->proc_tree
= NULL
;
9038 f
->where
= gfc_current_locus
;
9039 f
->next
= block
->f2k_derived
->finalizers
;
9040 block
->f2k_derived
->finalizers
= f
;
9050 const ext_attr_t ext_attr_list
[] = {
9051 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
9052 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
9053 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
9054 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
9055 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
9056 { "no_arg_check", EXT_ATTR_NO_ARG_CHECK
, NULL
},
9057 { NULL
, EXT_ATTR_LAST
, NULL
}
9060 /* Match a !GCC$ ATTRIBUTES statement of the form:
9061 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
9062 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
9064 TODO: We should support all GCC attributes using the same syntax for
9065 the attribute list, i.e. the list in C
9066 __attributes(( attribute-list ))
9068 !GCC$ ATTRIBUTES attribute-list ::
9069 Cf. c-parser.c's c_parser_attributes; the data can then directly be
9072 As there is absolutely no risk of confusion, we should never return
9075 gfc_match_gcc_attributes (void)
9077 symbol_attribute attr
;
9078 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
9083 gfc_clear_attr (&attr
);
9088 if (gfc_match_name (name
) != MATCH_YES
)
9091 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
9092 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
9095 if (id
== EXT_ATTR_LAST
)
9097 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
9101 if (!gfc_add_ext_attribute (&attr
, (ext_attr_id_t
)id
, &gfc_current_locus
))
9104 gfc_gobble_whitespace ();
9105 ch
= gfc_next_ascii_char ();
9108 /* This is the successful exit condition for the loop. */
9109 if (gfc_next_ascii_char () == ':')
9119 if (gfc_match_eos () == MATCH_YES
)
9124 m
= gfc_match_name (name
);
9128 if (find_special (name
, &sym
, true))
9131 sym
->attr
.ext_attr
|= attr
.ext_attr
;
9133 if (gfc_match_eos () == MATCH_YES
)
9136 if (gfc_match_char (',') != MATCH_YES
)
9143 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");