1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector
;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts
;
49 static symbol_attribute current_attr
;
50 static gfc_array_spec
*current_as
;
51 static int colon_seen
;
53 /* The current binding label (if any). */
54 static char curr_binding_label
[GFC_MAX_BINDING_LABEL_LEN
+ 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line
;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals
= 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr
*last_initializer
;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr
*initializer
;
74 struct enumerator_history
*next
;
78 /* Header of enum history chain. */
80 static enumerator_history
*enum_history
= NULL
;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history
*max_enum
= NULL
;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol
*gfc_new_block
;
90 bool gfc_matching_function
;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data
= false;
98 gfc_in_match_data (void)
100 return in_match_data
;
104 set_in_match_data (bool set_value
)
106 in_match_data
= set_value
;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable
*p
)
114 gfc_data_variable
*q
;
119 gfc_free_expr (p
->expr
);
120 gfc_free_iterator (&p
->iter
, 0);
121 free_variable (p
->list
);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value
*p
)
137 gfc_free_expr (p
->expr
);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data
*p
)
153 free_variable (p
->var
);
154 free_value (p
->value
);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace
*ns
)
176 static match
var_element (gfc_data_variable
*);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable
*parent
)
184 gfc_data_variable
*tail
, var
;
187 m
= var_element (&var
);
188 if (m
== MATCH_ERROR
)
193 tail
= gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES
)
203 m
= gfc_match_iterator (&parent
->iter
, 1);
206 if (m
== MATCH_ERROR
)
209 m
= var_element (&var
);
210 if (m
== MATCH_ERROR
)
215 tail
->next
= gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES
)
226 gfc_syntax_error (ST_DATA
);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable
*new_var
)
240 memset (new_var
, 0, sizeof (gfc_data_variable
));
242 if (gfc_match_char ('(') == MATCH_YES
)
243 return var_list (new_var
);
245 m
= gfc_match_variable (&new_var
->expr
, 0);
249 sym
= new_var
->expr
->symtree
->n
.sym
;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym
, gfc_current_ns
,
253 false, gfc_current_locus
) == FAILURE
)
256 if (!sym
->attr
.function
&& gfc_current_ns
->parent
257 && gfc_current_ns
->parent
== sym
->ns
)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym
->name
);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym
->attr
.in_common
266 && gfc_notify_std (GFC_STD_GNU
, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym
->name
) == FAILURE
)
271 if (gfc_add_data (&sym
->attr
, sym
->name
, &new_var
->expr
->where
) == FAILURE
)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data
*d
)
283 gfc_data_variable var
, *tail
, *new_var
;
290 m
= var_element (&var
);
293 if (m
== MATCH_ERROR
)
296 new_var
= gfc_get_data_variable ();
302 tail
->next
= new_var
;
306 if (gfc_match_char ('/') == MATCH_YES
)
308 if (gfc_match_char (',') != MATCH_YES
)
315 gfc_syntax_error (ST_DATA
);
316 gfc_free_data_all (gfc_current_ns
);
322 match_data_constant (gfc_expr
**result
)
324 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
330 m
= gfc_match_literal_constant (&expr
, 1);
337 if (m
== MATCH_ERROR
)
340 m
= gfc_match_null (result
);
344 old_loc
= gfc_current_locus
;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m
= gfc_match_rvalue (result
);
349 if (m
== MATCH_ERROR
)
352 if (m
== MATCH_YES
&& (*result
)->expr_type
== EXPR_STRUCTURE
)
354 if (gfc_simplify_expr (*result
, 0) == FAILURE
)
359 gfc_current_locus
= old_loc
;
361 m
= gfc_match_name (name
);
365 if (gfc_find_symbol (name
, NULL
, 1, &sym
))
369 || (sym
->attr
.flavor
!= FL_PARAMETER
&& sym
->attr
.flavor
!= FL_DERIVED
))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym
->attr
.flavor
== FL_DERIVED
)
376 return gfc_match_structure_constructor (sym
, result
, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym
->value
->expr_type
== EXPR_ARRAY
)
381 gfc_current_locus
= old_loc
;
383 m
= gfc_match_init_expr (result
);
384 if (m
== MATCH_ERROR
)
389 if (gfc_simplify_expr (*result
, 0) == FAILURE
)
392 if ((*result
)->expr_type
== EXPR_CONSTANT
)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name
);
402 *result
= gfc_copy_expr (sym
->value
);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data
*data
)
413 gfc_data_value
*new_val
, *tail
;
421 m
= match_data_constant (&expr
);
424 if (m
== MATCH_ERROR
)
427 new_val
= gfc_get_data_value ();
428 mpz_init (new_val
->repeat
);
431 data
->value
= new_val
;
433 tail
->next
= new_val
;
437 if (expr
->ts
.type
!= BT_INTEGER
|| gfc_match_char ('*') != MATCH_YES
)
440 mpz_set_ui (tail
->repeat
, 1);
444 if (expr
->ts
.type
== BT_INTEGER
)
445 mpz_set (tail
->repeat
, expr
->value
.integer
);
446 gfc_free_expr (expr
);
448 m
= match_data_constant (&tail
->expr
);
451 if (m
== MATCH_ERROR
)
455 if (gfc_match_char ('/') == MATCH_YES
)
457 if (gfc_match_char (',') == MATCH_NO
)
464 gfc_syntax_error (ST_DATA
);
465 gfc_free_data_all (gfc_current_ns
);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name
)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name
, NULL
, 0, &st
);
484 newdata
= gfc_get_data ();
485 newdata
->var
= gfc_get_data_variable ();
486 newdata
->var
->expr
= gfc_get_variable_expr (st
);
487 newdata
->where
= gfc_current_locus
;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m
= top_val_list (newdata
);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym
->attr
, sym
->name
, &sym
->declared_at
) == FAILURE
)
511 /* Chain in namespace list of DATA initializers. */
512 newdata
->next
= gfc_current_ns
->data
;
513 gfc_current_ns
->data
= newdata
;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data
= gfc_get_data ();
535 new_data
->where
= gfc_current_locus
;
537 m
= top_var_list (new_data
);
541 m
= top_val_list (new_data
);
545 new_data
->next
= gfc_current_ns
->data
;
546 gfc_current_ns
->data
= new_data
;
548 if (gfc_match_eos () == MATCH_YES
)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data
);
571 /************************ Declaration statements *********************/
573 /* Match an intent specification. Since this can only happen after an
574 INTENT word, a legal intent-spec must follow. */
577 match_intent_spec (void)
580 if (gfc_match (" ( in out )") == MATCH_YES
)
582 if (gfc_match (" ( in )") == MATCH_YES
)
584 if (gfc_match (" ( out )") == MATCH_YES
)
587 gfc_error ("Bad INTENT specification at %C");
588 return INTENT_UNKNOWN
;
592 /* Matches a character length specification, which is either a
593 specification expression or a '*'. */
596 char_len_param_value (gfc_expr
**expr
)
600 if (gfc_match_char ('*') == MATCH_YES
)
606 m
= gfc_match_expr (expr
);
609 && gfc_expr_check_typed (*expr
, gfc_current_ns
, false) == FAILURE
)
612 if (m
== MATCH_YES
&& (*expr
)->expr_type
== EXPR_FUNCTION
)
614 if ((*expr
)->value
.function
.actual
615 && (*expr
)->value
.function
.actual
->expr
->symtree
)
618 e
= (*expr
)->value
.function
.actual
->expr
;
619 if (e
->symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
620 && e
->expr_type
== EXPR_VARIABLE
)
622 if (e
->symtree
->n
.sym
->ts
.type
== BT_UNKNOWN
)
624 if (e
->symtree
->n
.sym
->ts
.type
== BT_CHARACTER
625 && e
->symtree
->n
.sym
->ts
.u
.cl
626 && e
->symtree
->n
.sym
->ts
.u
.cl
->length
->ts
.type
== BT_UNKNOWN
)
634 gfc_error ("Conflict in attributes of function argument at %C");
639 /* A character length is a '*' followed by a literal integer or a
640 char_len_param_value in parenthesis. */
643 match_char_length (gfc_expr
**expr
)
648 m
= gfc_match_char ('*');
652 m
= gfc_match_small_literal_int (&length
, NULL
);
653 if (m
== MATCH_ERROR
)
658 if (gfc_notify_std (GFC_STD_F95_OBS
, "Obsolescent feature: "
659 "Old-style character length at %C") == FAILURE
)
661 *expr
= gfc_int_expr (length
);
665 if (gfc_match_char ('(') == MATCH_NO
)
668 m
= char_len_param_value (expr
);
669 if (m
!= MATCH_YES
&& gfc_matching_function
)
675 if (m
== MATCH_ERROR
)
680 if (gfc_match_char (')') == MATCH_NO
)
682 gfc_free_expr (*expr
);
690 gfc_error ("Syntax error in character length specification at %C");
695 /* Special subroutine for finding a symbol. Check if the name is found
696 in the current name space. If not, and we're compiling a function or
697 subroutine and the parent compilation unit is an interface, then check
698 to see if the name we've been given is the name of the interface
699 (located in another namespace). */
702 find_special (const char *name
, gfc_symbol
**result
, bool allow_subroutine
)
708 i
= gfc_get_sym_tree (name
, NULL
, &st
, allow_subroutine
);
711 *result
= st
? st
->n
.sym
: NULL
;
715 if (gfc_current_state () != COMP_SUBROUTINE
716 && gfc_current_state () != COMP_FUNCTION
)
719 s
= gfc_state_stack
->previous
;
723 if (s
->state
!= COMP_INTERFACE
)
726 goto end
; /* Nameless interface. */
728 if (strcmp (name
, s
->sym
->name
) == 0)
739 /* Special subroutine for getting a symbol node associated with a
740 procedure name, used in SUBROUTINE and FUNCTION statements. The
741 symbol is created in the parent using with symtree node in the
742 child unit pointing to the symbol. If the current namespace has no
743 parent, then the symbol is just created in the current unit. */
746 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
752 /* Module functions have to be left in their own namespace because
753 they have potentially (almost certainly!) already been referenced.
754 In this sense, they are rather like external functions. This is
755 fixed up in resolve.c(resolve_entries), where the symbol name-
756 space is set to point to the master function, so that the fake
757 result mechanism can work. */
758 if (module_fcn_entry
)
760 /* Present if entry is declared to be a module procedure. */
761 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
764 rc
= gfc_get_symbol (name
, NULL
, result
);
765 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
766 && (*result
)->ts
.type
== BT_UNKNOWN
767 && sym
->attr
.flavor
== FL_UNKNOWN
)
768 /* Pick up the typespec for the entry, if declared in the function
769 body. Note that this symbol is FL_UNKNOWN because it will
770 only have appeared in a type declaration. The local symtree
771 is set to point to the module symbol and a unique symtree
772 to the local version. This latter ensures a correct clearing
775 /* If the ENTRY proceeds its specification, we need to ensure
776 that this does not raise a "has no IMPLICIT type" error. */
777 if (sym
->ts
.type
== BT_UNKNOWN
)
778 sym
->attr
.untyped
= 1;
780 (*result
)->ts
= sym
->ts
;
782 /* Put the symbol in the procedure namespace so that, should
783 the ENTRY precede its specification, the specification
785 (*result
)->ns
= gfc_current_ns
;
787 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
789 st
= gfc_get_unique_symtree (gfc_current_ns
);
794 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
800 gfc_current_ns
->refs
++;
802 if (sym
&& !sym
->gfc_new
&& gfc_current_state () != COMP_INTERFACE
)
804 /* Trap another encompassed procedure with the same name. All
805 these conditions are necessary to avoid picking up an entry
806 whose name clashes with that of the encompassing procedure;
807 this is handled using gsymbols to register unique,globally
809 if (sym
->attr
.flavor
!= 0
810 && sym
->attr
.proc
!= 0
811 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
812 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
813 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
814 name
, &sym
->declared_at
);
816 /* Trap a procedure with a name the same as interface in the
817 encompassing scope. */
818 if (sym
->attr
.generic
!= 0
819 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
820 && !sym
->attr
.mod_proc
)
821 gfc_error_now ("Name '%s' at %C is already defined"
822 " as a generic interface at %L",
823 name
, &sym
->declared_at
);
825 /* Trap declarations of attributes in encompassing scope. The
826 signature for this is that ts.kind is set. Legitimate
827 references only set ts.type. */
828 if (sym
->ts
.kind
!= 0
829 && !sym
->attr
.implicit_type
830 && sym
->attr
.proc
== 0
831 && gfc_current_ns
->parent
!= NULL
832 && sym
->attr
.access
== 0
833 && !module_fcn_entry
)
834 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
835 "and must not have attributes declared at %L",
836 name
, &sym
->declared_at
);
839 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
842 /* Module function entries will already have a symtree in
843 the current namespace but will need one at module level. */
844 if (module_fcn_entry
)
846 /* Present if entry is declared to be a module procedure. */
847 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
849 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
852 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
857 /* See if the procedure should be a module procedure. */
859 if (((sym
->ns
->proc_name
!= NULL
860 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
861 && sym
->attr
.proc
!= PROC_MODULE
)
862 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
863 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
864 sym
->name
, NULL
) == FAILURE
)
871 /* Verify that the given symbol representing a parameter is C
872 interoperable, by checking to see if it was marked as such after
873 its declaration. If the given symbol is not interoperable, a
874 warning is reported, thus removing the need to return the status to
875 the calling function. The standard does not require the user use
876 one of the iso_c_binding named constants to declare an
877 interoperable parameter, but we can't be sure if the param is C
878 interop or not if the user doesn't. For example, integer(4) may be
879 legal Fortran, but doesn't have meaning in C. It may interop with
880 a number of the C types, which causes a problem because the
881 compiler can't know which one. This code is almost certainly not
882 portable, and the user will get what they deserve if the C type
883 across platforms isn't always interoperable with integer(4). If
884 the user had used something like integer(c_int) or integer(c_long),
885 the compiler could have automatically handled the varying sizes
889 verify_c_interop_param (gfc_symbol
*sym
)
891 int is_c_interop
= 0;
892 gfc_try retval
= SUCCESS
;
894 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
895 Don't repeat the checks here. */
896 if (sym
->attr
.implicit_type
)
899 /* For subroutines or functions that are passed to a BIND(C) procedure,
900 they're interoperable if they're BIND(C) and their params are all
902 if (sym
->attr
.flavor
== FL_PROCEDURE
)
904 if (sym
->attr
.is_bind_c
== 0)
906 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
907 "attribute to be C interoperable", sym
->name
,
908 &(sym
->declared_at
));
914 if (sym
->attr
.is_c_interop
== 1)
915 /* We've already checked this procedure; don't check it again. */
918 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
923 /* See if we've stored a reference to a procedure that owns sym. */
924 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
926 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
929 (verify_c_interop (&(sym
->ts
))
932 if (is_c_interop
!= 1)
934 /* Make personalized messages to give better feedback. */
935 if (sym
->ts
.type
== BT_DERIVED
)
936 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
937 " procedure '%s' but is not C interoperable "
938 "because derived type '%s' is not C interoperable",
939 sym
->name
, &(sym
->declared_at
),
940 sym
->ns
->proc_name
->name
,
941 sym
->ts
.u
.derived
->name
);
943 gfc_warning ("Variable '%s' at %L is a parameter to the "
944 "BIND(C) procedure '%s' but may not be C "
946 sym
->name
, &(sym
->declared_at
),
947 sym
->ns
->proc_name
->name
);
950 /* Character strings are only C interoperable if they have a
952 if (sym
->ts
.type
== BT_CHARACTER
)
954 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
955 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
956 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
958 gfc_error ("Character argument '%s' at %L "
959 "must be length 1 because "
960 "procedure '%s' is BIND(C)",
961 sym
->name
, &sym
->declared_at
,
962 sym
->ns
->proc_name
->name
);
967 /* We have to make sure that any param to a bind(c) routine does
968 not have the allocatable, pointer, or optional attributes,
969 according to J3/04-007, section 5.1. */
970 if (sym
->attr
.allocatable
== 1)
972 gfc_error ("Variable '%s' at %L cannot have the "
973 "ALLOCATABLE attribute because procedure '%s'"
974 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
975 sym
->ns
->proc_name
->name
);
979 if (sym
->attr
.pointer
== 1)
981 gfc_error ("Variable '%s' at %L cannot have the "
982 "POINTER attribute because procedure '%s'"
983 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
984 sym
->ns
->proc_name
->name
);
988 if (sym
->attr
.optional
== 1)
990 gfc_error ("Variable '%s' at %L cannot have the "
991 "OPTIONAL attribute because procedure '%s'"
992 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
993 sym
->ns
->proc_name
->name
);
997 /* Make sure that if it has the dimension attribute, that it is
998 either assumed size or explicit shape. */
1001 if (sym
->as
->type
== AS_ASSUMED_SHAPE
)
1003 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1004 "argument to the procedure '%s' at %L because "
1005 "the procedure is BIND(C)", sym
->name
,
1006 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1007 &(sym
->ns
->proc_name
->declared_at
));
1011 if (sym
->as
->type
== AS_DEFERRED
)
1013 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1014 "argument to the procedure '%s' at %L because "
1015 "the procedure is BIND(C)", sym
->name
,
1016 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1017 &(sym
->ns
->proc_name
->declared_at
));
1028 /* Function called by variable_decl() that adds a name to the symbol table. */
1031 build_sym (const char *name
, gfc_charlen
*cl
,
1032 gfc_array_spec
**as
, locus
*var_locus
)
1034 symbol_attribute attr
;
1037 if (gfc_get_symbol (name
, NULL
, &sym
))
1040 /* Start updating the symbol table. Add basic type attribute if present. */
1041 if (current_ts
.type
!= BT_UNKNOWN
1042 && (sym
->attr
.implicit_type
== 0
1043 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1044 && gfc_add_type (sym
, ¤t_ts
, var_locus
) == FAILURE
)
1047 if (sym
->ts
.type
== BT_CHARACTER
)
1050 /* Add dimension attribute if present. */
1051 if (gfc_set_array_spec (sym
, *as
, var_locus
) == FAILURE
)
1055 /* Add attribute to symbol. The copy is so that we can reset the
1056 dimension attribute. */
1057 attr
= current_attr
;
1060 if (gfc_copy_attr (&sym
->attr
, &attr
, var_locus
) == FAILURE
)
1063 /* Finish any work that may need to be done for the binding label,
1064 if it's a bind(c). The bind(c) attr is found before the symbol
1065 is made, and before the symbol name (for data decls), so the
1066 current_ts is holding the binding label, or nothing if the
1067 name= attr wasn't given. Therefore, test here if we're dealing
1068 with a bind(c) and make sure the binding label is set correctly. */
1069 if (sym
->attr
.is_bind_c
== 1)
1071 if (sym
->binding_label
[0] == '\0')
1073 /* Set the binding label and verify that if a NAME= was specified
1074 then only one identifier was in the entity-decl-list. */
1075 if (set_binding_label (sym
->binding_label
, sym
->name
,
1076 num_idents_on_line
) == FAILURE
)
1081 /* See if we know we're in a common block, and if it's a bind(c)
1082 common then we need to make sure we're an interoperable type. */
1083 if (sym
->attr
.in_common
== 1)
1085 /* Test the common block object. */
1086 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1087 && sym
->ts
.is_c_interop
!= 1)
1089 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1090 "must be declared with a C interoperable "
1091 "kind since common block '%s' is BIND(C)",
1092 sym
->name
, sym
->common_block
->name
,
1093 sym
->common_block
->name
);
1098 sym
->attr
.implied_index
= 0;
1104 /* Set character constant to the given length. The constant will be padded or
1105 truncated. If we're inside an array constructor without a typespec, we
1106 additionally check that all elements have the same length; check_len -1
1107 means no checking. */
1110 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1115 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1116 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1118 slen
= expr
->value
.character
.length
;
1121 s
= gfc_get_wide_string (len
+ 1);
1122 memcpy (s
, expr
->value
.character
.string
,
1123 MIN (len
, slen
) * sizeof (gfc_char_t
));
1125 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1127 if (gfc_option
.warn_character_truncation
&& slen
> len
)
1128 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1129 "(%d/%d)", &expr
->where
, slen
, len
);
1131 /* Apply the standard by 'hand' otherwise it gets cleared for
1133 if (check_len
!= -1 && slen
!= check_len
1134 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1135 gfc_error_now ("The CHARACTER elements of the array constructor "
1136 "at %L must have the same length (%d/%d)",
1137 &expr
->where
, slen
, check_len
);
1140 gfc_free (expr
->value
.character
.string
);
1141 expr
->value
.character
.string
= s
;
1142 expr
->value
.character
.length
= len
;
1147 /* Function to create and update the enumerator history
1148 using the information passed as arguments.
1149 Pointer "max_enum" is also updated, to point to
1150 enum history node containing largest initializer.
1152 SYM points to the symbol node of enumerator.
1153 INIT points to its enumerator value. */
1156 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1158 enumerator_history
*new_enum_history
;
1159 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1161 new_enum_history
= XCNEW (enumerator_history
);
1163 new_enum_history
->sym
= sym
;
1164 new_enum_history
->initializer
= init
;
1165 new_enum_history
->next
= NULL
;
1167 if (enum_history
== NULL
)
1169 enum_history
= new_enum_history
;
1170 max_enum
= enum_history
;
1174 new_enum_history
->next
= enum_history
;
1175 enum_history
= new_enum_history
;
1177 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1178 new_enum_history
->initializer
->value
.integer
) < 0)
1179 max_enum
= new_enum_history
;
1184 /* Function to free enum kind history. */
1187 gfc_free_enum_history (void)
1189 enumerator_history
*current
= enum_history
;
1190 enumerator_history
*next
;
1192 while (current
!= NULL
)
1194 next
= current
->next
;
1199 enum_history
= NULL
;
1203 /* Function called by variable_decl() that adds an initialization
1204 expression to a symbol. */
1207 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1209 symbol_attribute attr
;
1214 if (find_special (name
, &sym
, false))
1219 /* If this symbol is confirming an implicit parameter type,
1220 then an initialization expression is not allowed. */
1221 if (attr
.flavor
== FL_PARAMETER
1222 && sym
->value
!= NULL
1225 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1232 /* An initializer is required for PARAMETER declarations. */
1233 if (attr
.flavor
== FL_PARAMETER
)
1235 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1241 /* If a variable appears in a DATA block, it cannot have an
1245 gfc_error ("Variable '%s' at %C with an initializer already "
1246 "appears in a DATA statement", sym
->name
);
1250 /* Check if the assignment can happen. This has to be put off
1251 until later for a derived type variable. */
1252 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1253 && gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1256 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.u
.cl
1257 && init
->ts
.type
== BT_CHARACTER
)
1259 /* Update symbol character length according initializer. */
1260 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1263 if (sym
->ts
.u
.cl
->length
== NULL
)
1266 /* If there are multiple CHARACTER variables declared on the
1267 same line, we don't want them to share the same length. */
1268 sym
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
);
1270 if (sym
->attr
.flavor
== FL_PARAMETER
)
1272 if (init
->expr_type
== EXPR_CONSTANT
)
1274 clen
= init
->value
.character
.length
;
1275 sym
->ts
.u
.cl
->length
= gfc_int_expr (clen
);
1277 else if (init
->expr_type
== EXPR_ARRAY
)
1279 gfc_expr
*p
= init
->value
.constructor
->expr
;
1280 clen
= p
->value
.character
.length
;
1281 sym
->ts
.u
.cl
->length
= gfc_int_expr (clen
);
1283 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
1284 sym
->ts
.u
.cl
->length
=
1285 gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
1288 /* Update initializer character length according symbol. */
1289 else if (sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1291 int len
= mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
);
1292 gfc_constructor
* p
;
1294 if (init
->expr_type
== EXPR_CONSTANT
)
1295 gfc_set_constant_character_len (len
, init
, -1);
1296 else if (init
->expr_type
== EXPR_ARRAY
)
1298 /* Build a new charlen to prevent simplification from
1299 deleting the length before it is resolved. */
1300 init
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
);
1301 init
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->ts
.u
.cl
->length
);
1303 for (p
= init
->value
.constructor
; p
; p
= p
->next
)
1304 gfc_set_constant_character_len (len
, p
->expr
, -1);
1309 /* Need to check if the expression we initialized this
1310 to was one of the iso_c_binding named constants. If so,
1311 and we're a parameter (constant), let it be iso_c.
1313 integer(c_int), parameter :: my_int = c_int
1314 integer(my_int) :: my_int_2
1315 If we mark my_int as iso_c (since we can see it's value
1316 is equal to one of the named constants), then my_int_2
1317 will be considered C interoperable. */
1318 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1320 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1321 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1322 /* attr bits needed for module files. */
1323 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1324 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1325 if (init
->ts
.is_iso_c
)
1326 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1329 /* Add initializer. Make sure we keep the ranks sane. */
1330 if (sym
->attr
.dimension
&& init
->rank
== 0)
1336 if (sym
->attr
.flavor
== FL_PARAMETER
1337 && init
->expr_type
== EXPR_CONSTANT
1338 && spec_size (sym
->as
, &size
) == SUCCESS
1339 && mpz_cmp_si (size
, 0) > 0)
1341 array
= gfc_start_constructor (init
->ts
.type
, init
->ts
.kind
,
1344 array
->value
.constructor
= c
= NULL
;
1345 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1347 if (array
->value
.constructor
== NULL
)
1349 array
->value
.constructor
= c
= gfc_get_constructor ();
1354 c
->next
= gfc_get_constructor ();
1356 c
->expr
= gfc_copy_expr (init
);
1360 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1361 for (n
= 0; n
< sym
->as
->rank
; n
++)
1362 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1367 init
->rank
= sym
->as
->rank
;
1371 if (sym
->attr
.save
== SAVE_NONE
)
1372 sym
->attr
.save
= SAVE_IMPLICIT
;
1380 /* Function called by variable_decl() that adds a name to a structure
1384 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1385 gfc_array_spec
**as
)
1389 /* If the current symbol is of the same derived type that we're
1390 constructing, it must have the pointer attribute. */
1391 if (current_ts
.type
== BT_DERIVED
1392 && current_ts
.u
.derived
== gfc_current_block ()
1393 && current_attr
.pointer
== 0)
1395 gfc_error ("Component at %C must have the POINTER attribute");
1399 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1401 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1403 gfc_error ("Array component of structure at %C must have explicit "
1404 "or deferred shape");
1409 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
1413 if (c
->ts
.type
== BT_CHARACTER
)
1415 c
->attr
= current_attr
;
1417 c
->initializer
= *init
;
1422 c
->attr
.dimension
= 1;
1425 /* Should this ever get more complicated, combine with similar section
1426 in add_init_expr_to_sym into a separate function. */
1427 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
&& c
->ts
.u
.cl
1428 && c
->ts
.u
.cl
->length
&& c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1432 gcc_assert (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
);
1433 gcc_assert (c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1434 gcc_assert (c
->ts
.u
.cl
->length
->ts
.type
== BT_INTEGER
);
1436 len
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
1438 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1439 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1440 else if (mpz_cmp (c
->ts
.u
.cl
->length
->value
.integer
,
1441 c
->initializer
->ts
.u
.cl
->length
->value
.integer
))
1444 gfc_constructor
*ctor
= c
->initializer
->value
.constructor
;
1446 has_ts
= (c
->initializer
->ts
.u
.cl
1447 && c
->initializer
->ts
.u
.cl
->length_from_typespec
);
1453 /* Remember the length of the first element for checking
1454 that all elements *in the constructor* have the same
1455 length. This need not be the length of the LHS! */
1456 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1457 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1458 first_len
= ctor
->expr
->value
.character
.length
;
1460 for (; ctor
; ctor
= ctor
->next
)
1462 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1463 gfc_set_constant_character_len (len
, ctor
->expr
,
1464 has_ts
? -1 : first_len
);
1470 /* Check array components. */
1471 if (!c
->attr
.dimension
)
1473 if (c
->attr
.allocatable
)
1475 gfc_error ("Allocatable component at %C must be an array");
1482 if (c
->attr
.pointer
)
1484 if (c
->as
->type
!= AS_DEFERRED
)
1486 gfc_error ("Pointer array component of structure at %C must have a "
1491 else if (c
->attr
.allocatable
)
1493 if (c
->as
->type
!= AS_DEFERRED
)
1495 gfc_error ("Allocatable component of structure at %C must have a "
1502 if (c
->as
->type
!= AS_EXPLICIT
)
1504 gfc_error ("Array component of structure at %C must have an "
1514 /* Match a 'NULL()', and possibly take care of some side effects. */
1517 gfc_match_null (gfc_expr
**result
)
1523 m
= gfc_match (" null ( )");
1527 /* The NULL symbol now has to be/become an intrinsic function. */
1528 if (gfc_get_symbol ("null", NULL
, &sym
))
1530 gfc_error ("NULL() initialization at %C is ambiguous");
1534 gfc_intrinsic_symbol (sym
);
1536 if (sym
->attr
.proc
!= PROC_INTRINSIC
1537 && (gfc_add_procedure (&sym
->attr
, PROC_INTRINSIC
,
1538 sym
->name
, NULL
) == FAILURE
1539 || gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
))
1542 e
= gfc_get_expr ();
1543 e
->where
= gfc_current_locus
;
1544 e
->expr_type
= EXPR_NULL
;
1545 e
->ts
.type
= BT_UNKNOWN
;
1553 /* Match a variable name with an optional initializer. When this
1554 subroutine is called, a variable is expected to be parsed next.
1555 Depending on what is happening at the moment, updates either the
1556 symbol table or the current interface. */
1559 variable_decl (int elem
)
1561 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1562 gfc_expr
*initializer
, *char_len
;
1564 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1575 old_locus
= gfc_current_locus
;
1577 /* When we get here, we've just matched a list of attributes and
1578 maybe a type and a double colon. The next thing we expect to see
1579 is the name of the symbol. */
1580 m
= gfc_match_name (name
);
1584 var_locus
= gfc_current_locus
;
1586 /* Now we could see the optional array spec. or character length. */
1587 m
= gfc_match_array_spec (&as
);
1588 if (gfc_option
.flag_cray_pointer
&& m
== MATCH_YES
)
1589 cp_as
= gfc_copy_array_spec (as
);
1590 else if (m
== MATCH_ERROR
)
1594 as
= gfc_copy_array_spec (current_as
);
1599 if (current_ts
.type
== BT_CHARACTER
)
1601 switch (match_char_length (&char_len
))
1604 cl
= gfc_new_charlen (gfc_current_ns
);
1606 cl
->length
= char_len
;
1609 /* Non-constant lengths need to be copied after the first
1610 element. Also copy assumed lengths. */
1613 && (current_ts
.u
.cl
->length
== NULL
1614 || current_ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1616 cl
= gfc_new_charlen (gfc_current_ns
);
1617 cl
->length
= gfc_copy_expr (current_ts
.u
.cl
->length
);
1620 cl
= current_ts
.u
.cl
;
1629 /* If this symbol has already shown up in a Cray Pointer declaration,
1630 then we want to set the type & bail out. */
1631 if (gfc_option
.flag_cray_pointer
)
1633 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1634 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
1636 sym
->ts
.type
= current_ts
.type
;
1637 sym
->ts
.kind
= current_ts
.kind
;
1639 sym
->ts
.u
.derived
= current_ts
.u
.derived
;
1640 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
1641 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
1644 /* Check to see if we have an array specification. */
1647 if (sym
->as
!= NULL
)
1649 gfc_error ("Duplicate array spec for Cray pointee at %C");
1650 gfc_free_array_spec (cp_as
);
1656 if (gfc_set_array_spec (sym
, cp_as
, &var_locus
) == FAILURE
)
1657 gfc_internal_error ("Couldn't set pointee array spec.");
1659 /* Fix the array spec. */
1660 m
= gfc_mod_pointee_as (sym
->as
);
1661 if (m
== MATCH_ERROR
)
1669 gfc_free_array_spec (cp_as
);
1673 /* Procedure pointer as function result. */
1674 if (gfc_current_state () == COMP_FUNCTION
1675 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
1676 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
1677 strcpy (name
, "ppr@");
1679 if (gfc_current_state () == COMP_FUNCTION
1680 && strcmp (name
, gfc_current_block ()->name
) == 0
1681 && gfc_current_block ()->result
1682 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
1683 strcpy (name
, "ppr@");
1685 /* OK, we've successfully matched the declaration. Now put the
1686 symbol in the current namespace, because it might be used in the
1687 optional initialization expression for this symbol, e.g. this is
1690 integer, parameter :: i = huge(i)
1692 This is only true for parameters or variables of a basic type.
1693 For components of derived types, it is not true, so we don't
1694 create a symbol for those yet. If we fail to create the symbol,
1696 if (gfc_current_state () != COMP_DERIVED
1697 && build_sym (name
, cl
, &as
, &var_locus
) == FAILURE
)
1703 /* An interface body specifies all of the procedure's
1704 characteristics and these shall be consistent with those
1705 specified in the procedure definition, except that the interface
1706 may specify a procedure that is not pure if the procedure is
1707 defined to be pure(12.3.2). */
1708 if (current_ts
.type
== BT_DERIVED
1709 && gfc_current_ns
->proc_name
1710 && gfc_current_ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
1711 && current_ts
.u
.derived
->ns
!= gfc_current_ns
)
1714 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, current_ts
.u
.derived
->name
);
1715 if (!(current_ts
.u
.derived
->attr
.imported
1717 && st
->n
.sym
== current_ts
.u
.derived
)
1718 && !gfc_current_ns
->has_import_set
)
1720 gfc_error ("the type of '%s' at %C has not been declared within the "
1727 /* In functions that have a RESULT variable defined, the function
1728 name always refers to function calls. Therefore, the name is
1729 not allowed to appear in specification statements. */
1730 if (gfc_current_state () == COMP_FUNCTION
1731 && gfc_current_block () != NULL
1732 && gfc_current_block ()->result
!= NULL
1733 && gfc_current_block ()->result
!= gfc_current_block ()
1734 && strcmp (gfc_current_block ()->name
, name
) == 0)
1736 gfc_error ("Function name '%s' not allowed at %C", name
);
1741 /* We allow old-style initializations of the form
1742 integer i /2/, j(4) /3*3, 1/
1743 (if no colon has been seen). These are different from data
1744 statements in that initializers are only allowed to apply to the
1745 variable immediately preceding, i.e.
1747 is not allowed. Therefore we have to do some work manually, that
1748 could otherwise be left to the matchers for DATA statements. */
1750 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
1752 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Old-style "
1753 "initialization at %C") == FAILURE
)
1756 return match_old_style_init (name
);
1759 /* The double colon must be present in order to have initializers.
1760 Otherwise the statement is ambiguous with an assignment statement. */
1763 if (gfc_match (" =>") == MATCH_YES
)
1765 if (!current_attr
.pointer
)
1767 gfc_error ("Initialization at %C isn't for a pointer variable");
1772 m
= gfc_match_null (&initializer
);
1775 gfc_error ("Pointer initialization requires a NULL() at %C");
1779 if (gfc_pure (NULL
))
1781 gfc_error ("Initialization of pointer at %C is not allowed in "
1782 "a PURE procedure");
1790 else if (gfc_match_char ('=') == MATCH_YES
)
1792 if (current_attr
.pointer
)
1794 gfc_error ("Pointer initialization at %C requires '=>', "
1800 m
= gfc_match_init_expr (&initializer
);
1803 gfc_error ("Expected an initialization expression at %C");
1807 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
))
1809 gfc_error ("Initialization of variable at %C is not allowed in "
1810 "a PURE procedure");
1819 if (initializer
!= NULL
&& current_attr
.allocatable
1820 && gfc_current_state () == COMP_DERIVED
)
1822 gfc_error ("Initialization of allocatable component at %C is not "
1828 /* Add the initializer. Note that it is fine if initializer is
1829 NULL here, because we sometimes also need to check if a
1830 declaration *must* have an initialization expression. */
1831 if (gfc_current_state () != COMP_DERIVED
)
1832 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
1835 if (current_ts
.type
== BT_DERIVED
1836 && !current_attr
.pointer
&& !initializer
)
1837 initializer
= gfc_default_initializer (¤t_ts
);
1838 t
= build_struct (name
, cl
, &initializer
, &as
);
1841 m
= (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
1844 /* Free stuff up and return. */
1845 gfc_free_expr (initializer
);
1846 gfc_free_array_spec (as
);
1852 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1853 This assumes that the byte size is equal to the kind number for
1854 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1857 gfc_match_old_kind_spec (gfc_typespec
*ts
)
1862 if (gfc_match_char ('*') != MATCH_YES
)
1865 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
1869 original_kind
= ts
->kind
;
1871 /* Massage the kind numbers for complex types. */
1872 if (ts
->type
== BT_COMPLEX
)
1876 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1877 gfc_basic_typename (ts
->type
), original_kind
);
1883 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
1885 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1886 gfc_basic_typename (ts
->type
), original_kind
);
1890 if (gfc_notify_std (GFC_STD_GNU
, "Nonstandard type declaration %s*%d at %C",
1891 gfc_basic_typename (ts
->type
), original_kind
) == FAILURE
)
1898 /* Match a kind specification. Since kinds are generally optional, we
1899 usually return MATCH_NO if something goes wrong. If a "kind="
1900 string is found, then we know we have an error. */
1903 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
1915 where
= loc
= gfc_current_locus
;
1920 if (gfc_match_char ('(') == MATCH_NO
)
1923 /* Also gobbles optional text. */
1924 if (gfc_match (" kind = ") == MATCH_YES
)
1927 loc
= gfc_current_locus
;
1930 n
= gfc_match_init_expr (&e
);
1934 if (gfc_matching_function
)
1936 /* The function kind expression might include use associated or
1937 imported parameters and try again after the specification
1939 if (gfc_match_char (')') != MATCH_YES
)
1941 gfc_error ("Missing right parenthesis at %C");
1947 gfc_undo_symbols ();
1952 /* ....or else, the match is real. */
1954 gfc_error ("Expected initialization expression at %C");
1962 gfc_error ("Expected scalar initialization expression at %C");
1967 msg
= gfc_extract_int (e
, &ts
->kind
);
1976 /* Before throwing away the expression, let's see if we had a
1977 C interoperable kind (and store the fact). */
1978 if (e
->ts
.is_c_interop
== 1)
1980 /* Mark this as c interoperable if being declared with one
1981 of the named constants from iso_c_binding. */
1982 ts
->is_c_interop
= e
->ts
.is_iso_c
;
1983 ts
->f90_type
= e
->ts
.f90_type
;
1989 /* Ignore errors to this point, if we've gotten here. This means
1990 we ignore the m=MATCH_ERROR from above. */
1991 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
1993 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
1994 gfc_basic_typename (ts
->type
));
1995 gfc_current_locus
= where
;
1999 /* Warn if, e.g., c_int is used for a REAL variable, but not
2000 if, e.g., c_double is used for COMPLEX as the standard
2001 explicitly says that the kind type parameter for complex and real
2002 variable is the same, i.e. c_float == c_float_complex. */
2003 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2004 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2005 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2006 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2007 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2008 gfc_basic_typename (ts
->type
));
2010 gfc_gobble_whitespace ();
2011 if ((c
= gfc_next_ascii_char ()) != ')'
2012 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2014 if (ts
->type
== BT_CHARACTER
)
2015 gfc_error ("Missing right parenthesis or comma at %C");
2017 gfc_error ("Missing right parenthesis at %C");
2021 /* All tests passed. */
2024 if(m
== MATCH_ERROR
)
2025 gfc_current_locus
= where
;
2027 /* Return what we know from the test(s). */
2032 gfc_current_locus
= where
;
2038 match_char_kind (int * kind
, int * is_iso_c
)
2047 where
= gfc_current_locus
;
2049 n
= gfc_match_init_expr (&e
);
2051 if (n
!= MATCH_YES
&& gfc_matching_function
)
2053 /* The expression might include use-associated or imported
2054 parameters and try again after the specification
2057 gfc_undo_symbols ();
2062 gfc_error ("Expected initialization expression at %C");
2068 gfc_error ("Expected scalar initialization expression at %C");
2073 msg
= gfc_extract_int (e
, kind
);
2074 *is_iso_c
= e
->ts
.is_iso_c
;
2084 /* Ignore errors to this point, if we've gotten here. This means
2085 we ignore the m=MATCH_ERROR from above. */
2086 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2088 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2092 /* All tests passed. */
2095 if (m
== MATCH_ERROR
)
2096 gfc_current_locus
= where
;
2098 /* Return what we know from the test(s). */
2103 gfc_current_locus
= where
;
2107 /* Match the various kind/length specifications in a CHARACTER
2108 declaration. We don't return MATCH_NO. */
2111 match_char_spec (gfc_typespec
*ts
)
2113 int kind
, seen_length
, is_iso_c
;
2123 /* Try the old-style specification first. */
2124 old_char_selector
= 0;
2126 m
= match_char_length (&len
);
2130 old_char_selector
= 1;
2135 m
= gfc_match_char ('(');
2138 m
= MATCH_YES
; /* Character without length is a single char. */
2142 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2143 if (gfc_match (" kind =") == MATCH_YES
)
2145 m
= match_char_kind (&kind
, &is_iso_c
);
2147 if (m
== MATCH_ERROR
)
2152 if (gfc_match (" , len =") == MATCH_NO
)
2155 m
= char_len_param_value (&len
);
2158 if (m
== MATCH_ERROR
)
2165 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2166 if (gfc_match (" len =") == MATCH_YES
)
2168 m
= char_len_param_value (&len
);
2171 if (m
== MATCH_ERROR
)
2175 if (gfc_match_char (')') == MATCH_YES
)
2178 if (gfc_match (" , kind =") != MATCH_YES
)
2181 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2187 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2188 m
= char_len_param_value (&len
);
2191 if (m
== MATCH_ERROR
)
2195 m
= gfc_match_char (')');
2199 if (gfc_match_char (',') != MATCH_YES
)
2202 gfc_match (" kind ="); /* Gobble optional text. */
2204 m
= match_char_kind (&kind
, &is_iso_c
);
2205 if (m
== MATCH_ERROR
)
2211 /* Require a right-paren at this point. */
2212 m
= gfc_match_char (')');
2217 gfc_error ("Syntax error in CHARACTER declaration at %C");
2219 gfc_free_expr (len
);
2223 /* Deal with character functions after USE and IMPORT statements. */
2224 if (gfc_matching_function
)
2226 gfc_free_expr (len
);
2227 gfc_undo_symbols ();
2233 gfc_free_expr (len
);
2237 /* Do some final massaging of the length values. */
2238 cl
= gfc_new_charlen (gfc_current_ns
);
2240 if (seen_length
== 0)
2241 cl
->length
= gfc_int_expr (1);
2246 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2248 /* We have to know if it was a c interoperable kind so we can
2249 do accurate type checking of bind(c) procs, etc. */
2251 /* Mark this as c interoperable if being declared with one
2252 of the named constants from iso_c_binding. */
2253 ts
->is_c_interop
= is_iso_c
;
2254 else if (len
!= NULL
)
2255 /* Here, we might have parsed something such as: character(c_char)
2256 In this case, the parsing code above grabs the c_char when
2257 looking for the length (line 1690, roughly). it's the last
2258 testcase for parsing the kind params of a character variable.
2259 However, it's not actually the length. this seems like it
2261 To see if the user used a C interop kind, test the expr
2262 of the so called length, and see if it's C interoperable. */
2263 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2269 /* Matches a type specification. If successful, sets the ts structure
2270 to the matched specification. This is necessary for FUNCTION and
2271 IMPLICIT statements.
2273 If implicit_flag is nonzero, then we don't check for the optional
2274 kind specification. Not doing so is needed for matching an IMPLICIT
2275 statement correctly. */
2278 gfc_match_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2280 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2284 bool seen_deferred_kind
;
2286 /* A belt and braces check that the typespec is correctly being treated
2287 as a deferred characteristic association. */
2288 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2289 && (gfc_current_block ()->result
->ts
.kind
== -1)
2290 && (ts
->kind
== -1);
2292 if (seen_deferred_kind
)
2295 /* Clear the current binding label, in case one is given. */
2296 curr_binding_label
[0] = '\0';
2298 if (gfc_match (" byte") == MATCH_YES
)
2300 if (gfc_notify_std (GFC_STD_GNU
, "Extension: BYTE type at %C")
2304 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2306 gfc_error ("BYTE type used at %C "
2307 "is not available on the target machine");
2311 ts
->type
= BT_INTEGER
;
2316 if (gfc_match (" integer") == MATCH_YES
)
2318 ts
->type
= BT_INTEGER
;
2319 ts
->kind
= gfc_default_integer_kind
;
2323 if (gfc_match (" character") == MATCH_YES
)
2325 ts
->type
= BT_CHARACTER
;
2326 if (implicit_flag
== 0)
2327 return match_char_spec (ts
);
2332 if (gfc_match (" real") == MATCH_YES
)
2335 ts
->kind
= gfc_default_real_kind
;
2339 if (gfc_match (" double precision") == MATCH_YES
)
2342 ts
->kind
= gfc_default_double_kind
;
2346 if (gfc_match (" complex") == MATCH_YES
)
2348 ts
->type
= BT_COMPLEX
;
2349 ts
->kind
= gfc_default_complex_kind
;
2353 if (gfc_match (" double complex") == MATCH_YES
)
2355 if (gfc_notify_std (GFC_STD_GNU
, "DOUBLE COMPLEX at %C does not "
2356 "conform to the Fortran 95 standard") == FAILURE
)
2359 ts
->type
= BT_COMPLEX
;
2360 ts
->kind
= gfc_default_double_kind
;
2364 if (gfc_match (" logical") == MATCH_YES
)
2366 ts
->type
= BT_LOGICAL
;
2367 ts
->kind
= gfc_default_logical_kind
;
2371 m
= gfc_match (" type ( %n )", name
);
2374 m
= gfc_match (" class ( %n )", name
);
2379 /* TODO: Implement Polymorphism. */
2380 gfc_warning ("Polymorphic entities are not yet implemented. "
2381 "CLASS will be treated like TYPE at %C");
2384 ts
->type
= BT_DERIVED
;
2386 /* Defer association of the derived type until the end of the
2387 specification block. However, if the derived type can be
2388 found, add it to the typespec. */
2389 if (gfc_matching_function
)
2391 ts
->u
.derived
= NULL
;
2392 if (gfc_current_state () != COMP_INTERFACE
2393 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2394 ts
->u
.derived
= sym
;
2398 /* Search for the name but allow the components to be defined later. If
2399 type = -1, this typespec has been seen in a function declaration but
2400 the type could not be accessed at that point. */
2402 if (ts
->kind
!= -1 && gfc_get_ha_symbol (name
, &sym
))
2404 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2407 else if (ts
->kind
== -1)
2409 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2410 || gfc_current_ns
->has_import_set
;
2411 if (gfc_find_symbol (name
, NULL
, iface
, &sym
))
2413 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2422 if (sym
->attr
.flavor
!= FL_DERIVED
2423 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
2426 gfc_set_sym_referenced (sym
);
2427 ts
->u
.derived
= sym
;
2432 /* For all types except double, derived and character, look for an
2433 optional kind specifier. MATCH_NO is actually OK at this point. */
2434 if (implicit_flag
== 1)
2437 if (gfc_current_form
== FORM_FREE
)
2439 c
= gfc_peek_ascii_char ();
2440 if (!gfc_is_whitespace (c
) && c
!= '*' && c
!= '('
2441 && c
!= ':' && c
!= ',')
2445 m
= gfc_match_kind_spec (ts
, false);
2446 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2447 m
= gfc_match_old_kind_spec (ts
);
2449 /* Defer association of the KIND expression of function results
2450 until after USE and IMPORT statements. */
2451 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2452 || gfc_matching_function
)
2456 m
= MATCH_YES
; /* No kind specifier found. */
2462 /* Match an IMPLICIT NONE statement. Actually, this statement is
2463 already matched in parse.c, or we would not end up here in the
2464 first place. So the only thing we need to check, is if there is
2465 trailing garbage. If not, the match is successful. */
2468 gfc_match_implicit_none (void)
2470 return (gfc_match_eos () == MATCH_YES
) ? MATCH_YES
: MATCH_NO
;
2474 /* Match the letter range(s) of an IMPLICIT statement. */
2477 match_implicit_range (void)
2483 cur_loc
= gfc_current_locus
;
2485 gfc_gobble_whitespace ();
2486 c
= gfc_next_ascii_char ();
2489 gfc_error ("Missing character range in IMPLICIT at %C");
2496 gfc_gobble_whitespace ();
2497 c1
= gfc_next_ascii_char ();
2501 gfc_gobble_whitespace ();
2502 c
= gfc_next_ascii_char ();
2507 inner
= 0; /* Fall through. */
2514 gfc_gobble_whitespace ();
2515 c2
= gfc_next_ascii_char ();
2519 gfc_gobble_whitespace ();
2520 c
= gfc_next_ascii_char ();
2522 if ((c
!= ',') && (c
!= ')'))
2535 gfc_error ("Letters must be in alphabetic order in "
2536 "IMPLICIT statement at %C");
2540 /* See if we can add the newly matched range to the pending
2541 implicits from this IMPLICIT statement. We do not check for
2542 conflicts with whatever earlier IMPLICIT statements may have
2543 set. This is done when we've successfully finished matching
2545 if (gfc_add_new_implicit_range (c1
, c2
) != SUCCESS
)
2552 gfc_syntax_error (ST_IMPLICIT
);
2554 gfc_current_locus
= cur_loc
;
2559 /* Match an IMPLICIT statement, storing the types for
2560 gfc_set_implicit() if the statement is accepted by the parser.
2561 There is a strange looking, but legal syntactic construction
2562 possible. It looks like:
2564 IMPLICIT INTEGER (a-b) (c-d)
2566 This is legal if "a-b" is a constant expression that happens to
2567 equal one of the legal kinds for integers. The real problem
2568 happens with an implicit specification that looks like:
2570 IMPLICIT INTEGER (a-b)
2572 In this case, a typespec matcher that is "greedy" (as most of the
2573 matchers are) gobbles the character range as a kindspec, leaving
2574 nothing left. We therefore have to go a bit more slowly in the
2575 matching process by inhibiting the kindspec checking during
2576 typespec matching and checking for a kind later. */
2579 gfc_match_implicit (void)
2588 /* We don't allow empty implicit statements. */
2589 if (gfc_match_eos () == MATCH_YES
)
2591 gfc_error ("Empty IMPLICIT statement at %C");
2597 /* First cleanup. */
2598 gfc_clear_new_implicit ();
2600 /* A basic type is mandatory here. */
2601 m
= gfc_match_type_spec (&ts
, 1);
2602 if (m
== MATCH_ERROR
)
2607 cur_loc
= gfc_current_locus
;
2608 m
= match_implicit_range ();
2612 /* We may have <TYPE> (<RANGE>). */
2613 gfc_gobble_whitespace ();
2614 c
= gfc_next_ascii_char ();
2615 if ((c
== '\n') || (c
== ','))
2617 /* Check for CHARACTER with no length parameter. */
2618 if (ts
.type
== BT_CHARACTER
&& !ts
.u
.cl
)
2620 ts
.kind
= gfc_default_character_kind
;
2621 ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
);
2622 ts
.u
.cl
->length
= gfc_int_expr (1);
2625 /* Record the Successful match. */
2626 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2631 gfc_current_locus
= cur_loc
;
2634 /* Discard the (incorrectly) matched range. */
2635 gfc_clear_new_implicit ();
2637 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2638 if (ts
.type
== BT_CHARACTER
)
2639 m
= match_char_spec (&ts
);
2642 m
= gfc_match_kind_spec (&ts
, false);
2645 m
= gfc_match_old_kind_spec (&ts
);
2646 if (m
== MATCH_ERROR
)
2652 if (m
== MATCH_ERROR
)
2655 m
= match_implicit_range ();
2656 if (m
== MATCH_ERROR
)
2661 gfc_gobble_whitespace ();
2662 c
= gfc_next_ascii_char ();
2663 if ((c
!= '\n') && (c
!= ','))
2666 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2674 gfc_syntax_error (ST_IMPLICIT
);
2682 gfc_match_import (void)
2684 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2689 if (gfc_current_ns
->proc_name
== NULL
2690 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
2692 gfc_error ("IMPORT statement at %C only permitted in "
2693 "an INTERFACE body");
2697 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IMPORT statement at %C")
2701 if (gfc_match_eos () == MATCH_YES
)
2703 /* All host variables should be imported. */
2704 gfc_current_ns
->has_import_set
= 1;
2708 if (gfc_match (" ::") == MATCH_YES
)
2710 if (gfc_match_eos () == MATCH_YES
)
2712 gfc_error ("Expecting list of named entities at %C");
2719 m
= gfc_match (" %n", name
);
2723 if (gfc_current_ns
->parent
!= NULL
2724 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
2726 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2729 else if (gfc_current_ns
->proc_name
->ns
->parent
!= NULL
2730 && gfc_find_symbol (name
,
2731 gfc_current_ns
->proc_name
->ns
->parent
,
2734 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2740 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2741 "at %C - does not exist.", name
);
2745 if (gfc_find_symtree (gfc_current_ns
->sym_root
,name
))
2747 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2752 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, sym
->name
);
2755 sym
->attr
.imported
= 1;
2767 if (gfc_match_eos () == MATCH_YES
)
2769 if (gfc_match_char (',') != MATCH_YES
)
2776 gfc_error ("Syntax error in IMPORT statement at %C");
2781 /* A minimal implementation of gfc_match without whitespace, escape
2782 characters or variable arguments. Returns true if the next
2783 characters match the TARGET template exactly. */
2786 match_string_p (const char *target
)
2790 for (p
= target
; *p
; p
++)
2791 if ((char) gfc_next_ascii_char () != *p
)
2796 /* Matches an attribute specification including array specs. If
2797 successful, leaves the variables current_attr and current_as
2798 holding the specification. Also sets the colon_seen variable for
2799 later use by matchers associated with initializations.
2801 This subroutine is a little tricky in the sense that we don't know
2802 if we really have an attr-spec until we hit the double colon.
2803 Until that time, we can only return MATCH_NO. This forces us to
2804 check for duplicate specification at this level. */
2807 match_attr_spec (void)
2809 /* Modifiers that can exist in a type statement. */
2811 { GFC_DECL_BEGIN
= 0,
2812 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
2813 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
2814 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
2815 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
2816 DECL_IS_BIND_C
, DECL_NONE
,
2817 GFC_DECL_END
/* Sentinel */
2821 /* GFC_DECL_END is the sentinel, index starts at 0. */
2822 #define NUM_DECL GFC_DECL_END
2824 locus start
, seen_at
[NUM_DECL
];
2831 gfc_clear_attr (¤t_attr
);
2832 start
= gfc_current_locus
;
2837 /* See if we get all of the keywords up to the final double colon. */
2838 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
2846 gfc_gobble_whitespace ();
2848 ch
= gfc_next_ascii_char ();
2851 /* This is the successful exit condition for the loop. */
2852 if (gfc_next_ascii_char () == ':')
2857 gfc_gobble_whitespace ();
2858 switch (gfc_peek_ascii_char ())
2861 if (match_string_p ("allocatable"))
2862 d
= DECL_ALLOCATABLE
;
2866 /* Try and match the bind(c). */
2867 m
= gfc_match_bind_c (NULL
, true);
2870 else if (m
== MATCH_ERROR
)
2875 if (match_string_p ("dimension"))
2880 if (match_string_p ("external"))
2885 if (match_string_p ("int"))
2887 ch
= gfc_next_ascii_char ();
2890 if (match_string_p ("nt"))
2892 /* Matched "intent". */
2893 /* TODO: Call match_intent_spec from here. */
2894 if (gfc_match (" ( in out )") == MATCH_YES
)
2896 else if (gfc_match (" ( in )") == MATCH_YES
)
2898 else if (gfc_match (" ( out )") == MATCH_YES
)
2904 if (match_string_p ("insic"))
2906 /* Matched "intrinsic". */
2914 if (match_string_p ("optional"))
2919 gfc_next_ascii_char ();
2920 switch (gfc_next_ascii_char ())
2923 if (match_string_p ("rameter"))
2925 /* Matched "parameter". */
2931 if (match_string_p ("inter"))
2933 /* Matched "pointer". */
2939 ch
= gfc_next_ascii_char ();
2942 if (match_string_p ("vate"))
2944 /* Matched "private". */
2950 if (match_string_p ("tected"))
2952 /* Matched "protected". */
2959 if (match_string_p ("blic"))
2961 /* Matched "public". */
2969 if (match_string_p ("save"))
2974 if (match_string_p ("target"))
2979 gfc_next_ascii_char ();
2980 ch
= gfc_next_ascii_char ();
2983 if (match_string_p ("lue"))
2985 /* Matched "value". */
2991 if (match_string_p ("latile"))
2993 /* Matched "volatile". */
3001 /* No double colon and no recognizable decl_type, so assume that
3002 we've been looking at something else the whole time. */
3009 /* Check to make sure any parens are paired up correctly. */
3010 if (gfc_match_parens () == MATCH_ERROR
)
3017 seen_at
[d
] = gfc_current_locus
;
3019 if (d
== DECL_DIMENSION
)
3021 m
= gfc_match_array_spec (¤t_as
);
3025 gfc_error ("Missing dimension specification at %C");
3029 if (m
== MATCH_ERROR
)
3034 /* Since we've seen a double colon, we have to be looking at an
3035 attr-spec. This means that we can now issue errors. */
3036 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3041 case DECL_ALLOCATABLE
:
3042 attr
= "ALLOCATABLE";
3044 case DECL_DIMENSION
:
3051 attr
= "INTENT (IN)";
3054 attr
= "INTENT (OUT)";
3057 attr
= "INTENT (IN OUT)";
3059 case DECL_INTRINSIC
:
3065 case DECL_PARAMETER
:
3071 case DECL_PROTECTED
:
3086 case DECL_IS_BIND_C
:
3096 attr
= NULL
; /* This shouldn't happen. */
3099 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3104 /* Now that we've dealt with duplicate attributes, add the attributes
3105 to the current attribute. */
3106 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3111 if (gfc_current_state () == COMP_DERIVED
3112 && d
!= DECL_DIMENSION
&& d
!= DECL_POINTER
3113 && d
!= DECL_PRIVATE
&& d
!= DECL_PUBLIC
3116 if (d
== DECL_ALLOCATABLE
)
3118 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ALLOCATABLE "
3119 "attribute at %C in a TYPE definition")
3128 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3135 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3136 && gfc_current_state () != COMP_MODULE
)
3138 if (d
== DECL_PRIVATE
)
3142 if (gfc_current_state () == COMP_DERIVED
3143 && gfc_state_stack
->previous
3144 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3146 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Attribute %s "
3147 "at %L in a TYPE definition", attr
,
3157 gfc_error ("%s attribute at %L is not allowed outside of the "
3158 "specification part of a module", attr
, &seen_at
[d
]);
3166 case DECL_ALLOCATABLE
:
3167 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3170 case DECL_DIMENSION
:
3171 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3175 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3179 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3183 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3187 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3190 case DECL_INTRINSIC
:
3191 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3195 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3198 case DECL_PARAMETER
:
3199 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3203 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3206 case DECL_PROTECTED
:
3207 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3209 gfc_error ("PROTECTED at %C only allowed in specification "
3210 "part of a module");
3215 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED "
3220 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3224 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3229 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3234 t
= gfc_add_save (¤t_attr
, NULL
, &seen_at
[d
]);
3238 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3241 case DECL_IS_BIND_C
:
3242 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3246 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE attribute "
3251 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3255 if (gfc_notify_std (GFC_STD_F2003
,
3256 "Fortran 2003: VOLATILE attribute at %C")
3260 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3264 gfc_internal_error ("match_attr_spec(): Bad attribute");
3278 gfc_current_locus
= start
;
3279 gfc_free_array_spec (current_as
);
3285 /* Set the binding label, dest_label, either with the binding label
3286 stored in the given gfc_typespec, ts, or if none was provided, it
3287 will be the symbol name in all lower case, as required by the draft
3288 (J3/04-007, section 15.4.1). If a binding label was given and
3289 there is more than one argument (num_idents), it is an error. */
3292 set_binding_label (char *dest_label
, const char *sym_name
, int num_idents
)
3294 if (num_idents
> 1 && has_name_equals
)
3296 gfc_error ("Multiple identifiers provided with "
3297 "single NAME= specifier at %C");
3301 if (curr_binding_label
[0] != '\0')
3303 /* Binding label given; store in temp holder til have sym. */
3304 strcpy (dest_label
, curr_binding_label
);
3308 /* No binding label given, and the NAME= specifier did not exist,
3309 which means there was no NAME="". */
3310 if (sym_name
!= NULL
&& has_name_equals
== 0)
3311 strcpy (dest_label
, sym_name
);
3318 /* Set the status of the given common block as being BIND(C) or not,
3319 depending on the given parameter, is_bind_c. */
3322 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3324 com_block
->is_bind_c
= is_bind_c
;
3329 /* Verify that the given gfc_typespec is for a C interoperable type. */
3332 verify_c_interop (gfc_typespec
*ts
)
3334 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
!= NULL
)
3335 return (ts
->u
.derived
->ts
.is_c_interop
? SUCCESS
: FAILURE
);
3336 else if (ts
->is_c_interop
!= 1)
3343 /* Verify that the variables of a given common block, which has been
3344 defined with the attribute specifier bind(c), to be of a C
3345 interoperable type. Errors will be reported here, if
3349 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3351 gfc_symbol
*curr_sym
= NULL
;
3352 gfc_try retval
= SUCCESS
;
3354 curr_sym
= com_block
->head
;
3356 /* Make sure we have at least one symbol. */
3357 if (curr_sym
== NULL
)
3360 /* Here we know we have a symbol, so we'll execute this loop
3364 /* The second to last param, 1, says this is in a common block. */
3365 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
3366 curr_sym
= curr_sym
->common_next
;
3367 } while (curr_sym
!= NULL
);
3373 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3374 an appropriate error message is reported. */
3377 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
3378 int is_in_common
, gfc_common_head
*com_block
)
3380 bool bind_c_function
= false;
3381 gfc_try retval
= SUCCESS
;
3383 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
3384 bind_c_function
= true;
3386 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
3388 tmp_sym
= tmp_sym
->result
;
3389 /* Make sure it wasn't an implicitly typed result. */
3390 if (tmp_sym
->attr
.implicit_type
)
3392 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3393 "%L may not be C interoperable", tmp_sym
->name
,
3394 &tmp_sym
->declared_at
);
3395 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
3396 /* Mark it as C interoperable to prevent duplicate warnings. */
3397 tmp_sym
->ts
.is_c_interop
= 1;
3398 tmp_sym
->attr
.is_c_interop
= 1;
3402 /* Here, we know we have the bind(c) attribute, so if we have
3403 enough type info, then verify that it's a C interop kind.
3404 The info could be in the symbol already, or possibly still in
3405 the given ts (current_ts), so look in both. */
3406 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
3408 if (verify_c_interop (&(tmp_sym
->ts
)) != SUCCESS
)
3410 /* See if we're dealing with a sym in a common block or not. */
3411 if (is_in_common
== 1)
3413 gfc_warning ("Variable '%s' in common block '%s' at %L "
3414 "may not be a C interoperable "
3415 "kind though common block '%s' is BIND(C)",
3416 tmp_sym
->name
, com_block
->name
,
3417 &(tmp_sym
->declared_at
), com_block
->name
);
3421 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
3422 gfc_error ("Type declaration '%s' at %L is not C "
3423 "interoperable but it is BIND(C)",
3424 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3426 gfc_warning ("Variable '%s' at %L "
3427 "may not be a C interoperable "
3428 "kind but it is bind(c)",
3429 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3433 /* Variables declared w/in a common block can't be bind(c)
3434 since there's no way for C to see these variables, so there's
3435 semantically no reason for the attribute. */
3436 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
3438 gfc_error ("Variable '%s' in common block '%s' at "
3439 "%L cannot be declared with BIND(C) "
3440 "since it is not a global",
3441 tmp_sym
->name
, com_block
->name
,
3442 &(tmp_sym
->declared_at
));
3446 /* Scalar variables that are bind(c) can not have the pointer
3447 or allocatable attributes. */
3448 if (tmp_sym
->attr
.is_bind_c
== 1)
3450 if (tmp_sym
->attr
.pointer
== 1)
3452 gfc_error ("Variable '%s' at %L cannot have both the "
3453 "POINTER and BIND(C) attributes",
3454 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3458 if (tmp_sym
->attr
.allocatable
== 1)
3460 gfc_error ("Variable '%s' at %L cannot have both the "
3461 "ALLOCATABLE and BIND(C) attributes",
3462 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3468 /* If it is a BIND(C) function, make sure the return value is a
3469 scalar value. The previous tests in this function made sure
3470 the type is interoperable. */
3471 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
3472 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3473 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
3475 /* BIND(C) functions can not return a character string. */
3476 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
3477 if (tmp_sym
->ts
.u
.cl
== NULL
|| tmp_sym
->ts
.u
.cl
->length
== NULL
3478 || tmp_sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
3479 || mpz_cmp_si (tmp_sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0)
3480 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3481 "be a character string", tmp_sym
->name
,
3482 &(tmp_sym
->declared_at
));
3485 /* See if the symbol has been marked as private. If it has, make sure
3486 there is no binding label and warn the user if there is one. */
3487 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
3488 && tmp_sym
->binding_label
[0] != '\0')
3489 /* Use gfc_warning_now because we won't say that the symbol fails
3490 just because of this. */
3491 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3492 "given the binding label '%s'", tmp_sym
->name
,
3493 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
3499 /* Set the appropriate fields for a symbol that's been declared as
3500 BIND(C) (the is_bind_c flag and the binding label), and verify that
3501 the type is C interoperable. Errors are reported by the functions
3502 used to set/test these fields. */
3505 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
3507 gfc_try retval
= SUCCESS
;
3509 /* TODO: Do we need to make sure the vars aren't marked private? */
3511 /* Set the is_bind_c bit in symbol_attribute. */
3512 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
3514 if (set_binding_label (tmp_sym
->binding_label
, tmp_sym
->name
,
3515 num_idents
) != SUCCESS
)
3522 /* Set the fields marking the given common block as BIND(C), including
3523 a binding label, and report any errors encountered. */
3526 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
3528 gfc_try retval
= SUCCESS
;
3530 /* destLabel, common name, typespec (which may have binding label). */
3531 if (set_binding_label (com_block
->binding_label
, com_block
->name
, num_idents
)
3535 /* Set the given common block (com_block) to being bind(c) (1). */
3536 set_com_block_bind_c (com_block
, 1);
3542 /* Retrieve the list of one or more identifiers that the given bind(c)
3543 attribute applies to. */
3546 get_bind_c_idents (void)
3548 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3550 gfc_symbol
*tmp_sym
= NULL
;
3552 gfc_common_head
*com_block
= NULL
;
3554 if (gfc_match_name (name
) == MATCH_YES
)
3556 found_id
= MATCH_YES
;
3557 gfc_get_ha_symbol (name
, &tmp_sym
);
3559 else if (match_common_name (name
) == MATCH_YES
)
3561 found_id
= MATCH_YES
;
3562 com_block
= gfc_get_common (name
, 0);
3566 gfc_error ("Need either entity or common block name for "
3567 "attribute specification statement at %C");
3571 /* Save the current identifier and look for more. */
3574 /* Increment the number of identifiers found for this spec stmt. */
3577 /* Make sure we have a sym or com block, and verify that it can
3578 be bind(c). Set the appropriate field(s) and look for more
3580 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
3582 if (tmp_sym
!= NULL
)
3584 if (set_verify_bind_c_sym (tmp_sym
, num_idents
)
3590 if (set_verify_bind_c_com_block(com_block
, num_idents
)
3595 /* Look to see if we have another identifier. */
3597 if (gfc_match_eos () == MATCH_YES
)
3598 found_id
= MATCH_NO
;
3599 else if (gfc_match_char (',') != MATCH_YES
)
3600 found_id
= MATCH_NO
;
3601 else if (gfc_match_name (name
) == MATCH_YES
)
3603 found_id
= MATCH_YES
;
3604 gfc_get_ha_symbol (name
, &tmp_sym
);
3606 else if (match_common_name (name
) == MATCH_YES
)
3608 found_id
= MATCH_YES
;
3609 com_block
= gfc_get_common (name
, 0);
3613 gfc_error ("Missing entity or common block name for "
3614 "attribute specification statement at %C");
3620 gfc_internal_error ("Missing symbol");
3622 } while (found_id
== MATCH_YES
);
3624 /* if we get here we were successful */
3629 /* Try and match a BIND(C) attribute specification statement. */
3632 gfc_match_bind_c_stmt (void)
3634 match found_match
= MATCH_NO
;
3639 /* This may not be necessary. */
3641 /* Clear the temporary binding label holder. */
3642 curr_binding_label
[0] = '\0';
3644 /* Look for the bind(c). */
3645 found_match
= gfc_match_bind_c (NULL
, true);
3647 if (found_match
== MATCH_YES
)
3649 /* Look for the :: now, but it is not required. */
3652 /* Get the identifier(s) that needs to be updated. This may need to
3653 change to hand the flag(s) for the attr specified so all identifiers
3654 found can have all appropriate parts updated (assuming that the same
3655 spec stmt can have multiple attrs, such as both bind(c) and
3657 if (get_bind_c_idents () != SUCCESS
)
3658 /* Error message should have printed already. */
3666 /* Match a data declaration statement. */
3669 gfc_match_data_decl (void)
3675 num_idents_on_line
= 0;
3677 m
= gfc_match_type_spec (¤t_ts
, 0);
3681 if (current_ts
.type
== BT_DERIVED
&& gfc_current_state () != COMP_DERIVED
)
3683 sym
= gfc_use_derived (current_ts
.u
.derived
);
3691 current_ts
.u
.derived
= sym
;
3694 m
= match_attr_spec ();
3695 if (m
== MATCH_ERROR
)
3701 if (current_ts
.type
== BT_DERIVED
&& current_ts
.u
.derived
->components
== NULL
3702 && !current_ts
.u
.derived
->attr
.zero_comp
)
3705 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
3708 gfc_find_symbol (current_ts
.u
.derived
->name
,
3709 current_ts
.u
.derived
->ns
->parent
, 1, &sym
);
3711 /* Any symbol that we find had better be a type definition
3712 which has its components defined. */
3713 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
3714 && (current_ts
.u
.derived
->components
!= NULL
3715 || current_ts
.u
.derived
->attr
.zero_comp
))
3718 /* Now we have an error, which we signal, and then fix up
3719 because the knock-on is plain and simple confusing. */
3720 gfc_error_now ("Derived type at %C has not been previously defined "
3721 "and so cannot appear in a derived type definition");
3722 current_attr
.pointer
= 1;
3727 /* If we have an old-style character declaration, and no new-style
3728 attribute specifications, then there a comma is optional between
3729 the type specification and the variable list. */
3730 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
3731 gfc_match_char (',');
3733 /* Give the types/attributes to symbols that follow. Give the element
3734 a number so that repeat character length expressions can be copied. */
3738 num_idents_on_line
++;
3739 m
= variable_decl (elem
++);
3740 if (m
== MATCH_ERROR
)
3745 if (gfc_match_eos () == MATCH_YES
)
3747 if (gfc_match_char (',') != MATCH_YES
)
3751 if (gfc_error_flag_test () == 0)
3752 gfc_error ("Syntax error in data declaration at %C");
3755 gfc_free_data_all (gfc_current_ns
);
3758 gfc_free_array_spec (current_as
);
3764 /* Match a prefix associated with a function or subroutine
3765 declaration. If the typespec pointer is nonnull, then a typespec
3766 can be matched. Note that if nothing matches, MATCH_YES is
3767 returned (the null string was matched). */
3770 gfc_match_prefix (gfc_typespec
*ts
)
3774 gfc_clear_attr (¤t_attr
);
3777 gcc_assert (!gfc_matching_prefix
);
3778 gfc_matching_prefix
= true;
3781 if (!seen_type
&& ts
!= NULL
3782 && gfc_match_type_spec (ts
, 0) == MATCH_YES
3783 && gfc_match_space () == MATCH_YES
)
3790 if (gfc_match ("elemental% ") == MATCH_YES
)
3792 if (gfc_add_elemental (¤t_attr
, NULL
) == FAILURE
)
3798 if (gfc_match ("pure% ") == MATCH_YES
)
3800 if (gfc_add_pure (¤t_attr
, NULL
) == FAILURE
)
3806 if (gfc_match ("recursive% ") == MATCH_YES
)
3808 if (gfc_add_recursive (¤t_attr
, NULL
) == FAILURE
)
3814 /* At this point, the next item is not a prefix. */
3815 gcc_assert (gfc_matching_prefix
);
3816 gfc_matching_prefix
= false;
3820 gcc_assert (gfc_matching_prefix
);
3821 gfc_matching_prefix
= false;
3826 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3829 copy_prefix (symbol_attribute
*dest
, locus
*where
)
3831 if (current_attr
.pure
&& gfc_add_pure (dest
, where
) == FAILURE
)
3834 if (current_attr
.elemental
&& gfc_add_elemental (dest
, where
) == FAILURE
)
3837 if (current_attr
.recursive
&& gfc_add_recursive (dest
, where
) == FAILURE
)
3844 /* Match a formal argument list. */
3847 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
3849 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
3850 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3856 if (gfc_match_char ('(') != MATCH_YES
)
3863 if (gfc_match_char (')') == MATCH_YES
)
3868 if (gfc_match_char ('*') == MATCH_YES
)
3872 m
= gfc_match_name (name
);
3876 if (gfc_get_symbol (name
, NULL
, &sym
))
3880 p
= gfc_get_formal_arglist ();
3892 /* We don't add the VARIABLE flavor because the name could be a
3893 dummy procedure. We don't apply these attributes to formal
3894 arguments of statement functions. */
3895 if (sym
!= NULL
&& !st_flag
3896 && (gfc_add_dummy (&sym
->attr
, sym
->name
, NULL
) == FAILURE
3897 || gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
))
3903 /* The name of a program unit can be in a different namespace,
3904 so check for it explicitly. After the statement is accepted,
3905 the name is checked for especially in gfc_get_symbol(). */
3906 if (gfc_new_block
!= NULL
&& sym
!= NULL
3907 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
3909 gfc_error ("Name '%s' at %C is the name of the procedure",
3915 if (gfc_match_char (')') == MATCH_YES
)
3918 m
= gfc_match_char (',');
3921 gfc_error ("Unexpected junk in formal argument list at %C");
3927 /* Check for duplicate symbols in the formal argument list. */
3930 for (p
= head
; p
->next
; p
= p
->next
)
3935 for (q
= p
->next
; q
; q
= q
->next
)
3936 if (p
->sym
== q
->sym
)
3938 gfc_error ("Duplicate symbol '%s' in formal argument list "
3939 "at %C", p
->sym
->name
);
3947 if (gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
)
3957 gfc_free_formal_arglist (head
);
3962 /* Match a RESULT specification following a function declaration or
3963 ENTRY statement. Also matches the end-of-statement. */
3966 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
3968 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3972 if (gfc_match (" result (") != MATCH_YES
)
3975 m
= gfc_match_name (name
);
3979 /* Get the right paren, and that's it because there could be the
3980 bind(c) attribute after the result clause. */
3981 if (gfc_match_char(')') != MATCH_YES
)
3983 /* TODO: should report the missing right paren here. */
3987 if (strcmp (function
->name
, name
) == 0)
3989 gfc_error ("RESULT variable at %C must be different than function name");
3993 if (gfc_get_symbol (name
, NULL
, &r
))
3996 if (gfc_add_result (&r
->attr
, r
->name
, NULL
) == FAILURE
)
4005 /* Match a function suffix, which could be a combination of a result
4006 clause and BIND(C), either one, or neither. The draft does not
4007 require them to come in a specific order. */
4010 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4012 match is_bind_c
; /* Found bind(c). */
4013 match is_result
; /* Found result clause. */
4014 match found_match
; /* Status of whether we've found a good match. */
4015 char peek_char
; /* Character we're going to peek at. */
4016 bool allow_binding_name
;
4018 /* Initialize to having found nothing. */
4019 found_match
= MATCH_NO
;
4020 is_bind_c
= MATCH_NO
;
4021 is_result
= MATCH_NO
;
4023 /* Get the next char to narrow between result and bind(c). */
4024 gfc_gobble_whitespace ();
4025 peek_char
= gfc_peek_ascii_char ();
4027 /* C binding names are not allowed for internal procedures. */
4028 if (gfc_current_state () == COMP_CONTAINS
4029 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4030 allow_binding_name
= false;
4032 allow_binding_name
= true;
4037 /* Look for result clause. */
4038 is_result
= match_result (sym
, result
);
4039 if (is_result
== MATCH_YES
)
4041 /* Now see if there is a bind(c) after it. */
4042 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4043 /* We've found the result clause and possibly bind(c). */
4044 found_match
= MATCH_YES
;
4047 /* This should only be MATCH_ERROR. */
4048 found_match
= is_result
;
4051 /* Look for bind(c) first. */
4052 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4053 if (is_bind_c
== MATCH_YES
)
4055 /* Now see if a result clause followed it. */
4056 is_result
= match_result (sym
, result
);
4057 found_match
= MATCH_YES
;
4061 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4062 found_match
= MATCH_ERROR
;
4066 gfc_error ("Unexpected junk after function declaration at %C");
4067 found_match
= MATCH_ERROR
;
4071 if (is_bind_c
== MATCH_YES
)
4073 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4074 if (gfc_current_state () == COMP_CONTAINS
4075 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4076 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
4077 "at %L may not be specified for an internal "
4078 "procedure", &gfc_current_locus
)
4082 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1)
4091 /* Procedure pointer return value without RESULT statement:
4092 Add "hidden" result variable named "ppr@". */
4095 add_hidden_procptr_result (gfc_symbol
*sym
)
4099 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4102 /* First usage case: PROCEDURE and EXTERNAL statements. */
4103 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4104 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4105 && sym
->attr
.external
;
4106 /* Second usage case: INTERFACE statements. */
4107 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4108 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4109 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4115 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4119 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4120 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4121 st2
->n
.sym
= stree
->n
.sym
;
4123 sym
->result
= stree
->n
.sym
;
4125 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4126 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4127 sym
->result
->attr
.external
= sym
->attr
.external
;
4128 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4129 sym
->result
->ts
= sym
->ts
;
4130 sym
->attr
.proc_pointer
= 0;
4131 sym
->attr
.pointer
= 0;
4132 sym
->attr
.external
= 0;
4133 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4135 sym
->result
->attr
.pointer
= 0;
4136 sym
->result
->attr
.proc_pointer
= 1;
4139 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4141 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4142 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4143 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4144 && sym
== gfc_current_ns
->proc_name
4145 && sym
== sym
->result
->ns
->proc_name
4146 && strcmp ("ppr@", sym
->result
->name
) == 0)
4148 sym
->result
->attr
.proc_pointer
= 1;
4149 sym
->attr
.pointer
= 0;
4157 /* Match the interface for a PROCEDURE declaration,
4158 including brackets (R1212). */
4161 match_procedure_interface (gfc_symbol
**proc_if
)
4165 locus old_loc
, entry_loc
;
4166 gfc_namespace
*old_ns
= gfc_current_ns
;
4167 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4169 old_loc
= entry_loc
= gfc_current_locus
;
4170 gfc_clear_ts (¤t_ts
);
4172 if (gfc_match (" (") != MATCH_YES
)
4174 gfc_current_locus
= entry_loc
;
4178 /* Get the type spec. for the procedure interface. */
4179 old_loc
= gfc_current_locus
;
4180 m
= gfc_match_type_spec (¤t_ts
, 0);
4181 gfc_gobble_whitespace ();
4182 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4185 if (m
== MATCH_ERROR
)
4188 /* Procedure interface is itself a procedure. */
4189 gfc_current_locus
= old_loc
;
4190 m
= gfc_match_name (name
);
4192 /* First look to see if it is already accessible in the current
4193 namespace because it is use associated or contained. */
4195 if (gfc_find_sym_tree (name
, NULL
, 0, &st
))
4198 /* If it is still not found, then try the parent namespace, if it
4199 exists and create the symbol there if it is still not found. */
4200 if (gfc_current_ns
->parent
)
4201 gfc_current_ns
= gfc_current_ns
->parent
;
4202 if (st
== NULL
&& gfc_get_ha_sym_tree (name
, &st
))
4205 gfc_current_ns
= old_ns
;
4206 *proc_if
= st
->n
.sym
;
4208 /* Various interface checks. */
4212 /* Resolve interface if possible. That way, attr.procedure is only set
4213 if it is declared by a later procedure-declaration-stmt, which is
4214 invalid per C1212. */
4215 while ((*proc_if
)->ts
.interface
)
4216 *proc_if
= (*proc_if
)->ts
.interface
;
4218 if ((*proc_if
)->generic
)
4220 gfc_error ("Interface '%s' at %C may not be generic",
4224 if ((*proc_if
)->attr
.proc
== PROC_ST_FUNCTION
)
4226 gfc_error ("Interface '%s' at %C may not be a statement function",
4230 /* Handle intrinsic procedures. */
4231 if (!((*proc_if
)->attr
.external
|| (*proc_if
)->attr
.use_assoc
4232 || (*proc_if
)->attr
.if_source
== IFSRC_IFBODY
)
4233 && (gfc_is_intrinsic ((*proc_if
), 0, gfc_current_locus
)
4234 || gfc_is_intrinsic ((*proc_if
), 1, gfc_current_locus
)))
4235 (*proc_if
)->attr
.intrinsic
= 1;
4236 if ((*proc_if
)->attr
.intrinsic
4237 && !gfc_intrinsic_actual_ok ((*proc_if
)->name
, 0))
4239 gfc_error ("Intrinsic procedure '%s' not allowed "
4240 "in PROCEDURE statement at %C", (*proc_if
)->name
);
4246 if (gfc_match (" )") != MATCH_YES
)
4248 gfc_current_locus
= entry_loc
;
4256 /* Match a PROCEDURE declaration (R1211). */
4259 match_procedure_decl (void)
4262 gfc_symbol
*sym
, *proc_if
= NULL
;
4264 gfc_expr
*initializer
= NULL
;
4266 /* Parse interface (with brackets). */
4267 m
= match_procedure_interface (&proc_if
);
4271 /* Parse attributes (with colons). */
4272 m
= match_attr_spec();
4273 if (m
== MATCH_ERROR
)
4276 /* Get procedure symbols. */
4279 m
= gfc_match_symbol (&sym
, 0);
4282 else if (m
== MATCH_ERROR
)
4285 /* Add current_attr to the symbol attributes. */
4286 if (gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4289 if (sym
->attr
.is_bind_c
)
4291 /* Check for C1218. */
4292 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4294 gfc_error ("BIND(C) attribute at %C requires "
4295 "an interface with BIND(C)");
4298 /* Check for C1217. */
4299 if (has_name_equals
&& sym
->attr
.pointer
)
4301 gfc_error ("BIND(C) procedure with NAME may not have "
4302 "POINTER attribute at %C");
4305 if (has_name_equals
&& sym
->attr
.dummy
)
4307 gfc_error ("Dummy procedure at %C may not have "
4308 "BIND(C) attribute with NAME");
4311 /* Set binding label for BIND(C). */
4312 if (set_binding_label (sym
->binding_label
, sym
->name
, num
) != SUCCESS
)
4316 if (gfc_add_external (&sym
->attr
, NULL
) == FAILURE
)
4319 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4322 if (gfc_add_proc (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4325 /* Set interface. */
4326 if (proc_if
!= NULL
)
4328 if (sym
->ts
.type
!= BT_UNKNOWN
)
4330 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4331 sym
->name
, &gfc_current_locus
,
4332 gfc_basic_typename (sym
->ts
.type
));
4335 sym
->ts
.interface
= proc_if
;
4336 sym
->attr
.untyped
= 1;
4337 sym
->attr
.if_source
= IFSRC_IFBODY
;
4339 else if (current_ts
.type
!= BT_UNKNOWN
)
4341 if (gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4343 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4344 sym
->ts
.interface
->ts
= current_ts
;
4345 sym
->ts
.interface
->attr
.function
= 1;
4346 sym
->attr
.function
= sym
->ts
.interface
->attr
.function
;
4347 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
4350 if (gfc_match (" =>") == MATCH_YES
)
4352 if (!current_attr
.pointer
)
4354 gfc_error ("Initialization at %C isn't for a pointer variable");
4359 m
= gfc_match_null (&initializer
);
4362 gfc_error ("Pointer initialization requires a NULL() at %C");
4366 if (gfc_pure (NULL
))
4368 gfc_error ("Initialization of pointer at %C is not allowed in "
4369 "a PURE procedure");
4376 if (add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
)
4382 gfc_set_sym_referenced (sym
);
4384 if (gfc_match_eos () == MATCH_YES
)
4386 if (gfc_match_char (',') != MATCH_YES
)
4391 gfc_error ("Syntax error in PROCEDURE statement at %C");
4395 /* Free stuff up and return. */
4396 gfc_free_expr (initializer
);
4402 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
4405 /* Match a procedure pointer component declaration (R445). */
4408 match_ppc_decl (void)
4411 gfc_symbol
*proc_if
= NULL
;
4415 gfc_expr
*initializer
= NULL
;
4416 gfc_typebound_proc
* tb
;
4417 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4419 /* Parse interface (with brackets). */
4420 m
= match_procedure_interface (&proc_if
);
4424 /* Parse attributes. */
4425 tb
= XCNEW (gfc_typebound_proc
);
4426 tb
->where
= gfc_current_locus
;
4427 m
= match_binding_attributes (tb
, false, true);
4428 if (m
== MATCH_ERROR
)
4431 gfc_clear_attr (¤t_attr
);
4432 current_attr
.procedure
= 1;
4433 current_attr
.proc_pointer
= 1;
4434 current_attr
.access
= tb
->access
;
4435 current_attr
.flavor
= FL_PROCEDURE
;
4437 /* Match the colons (required). */
4438 if (gfc_match (" ::") != MATCH_YES
)
4440 gfc_error ("Expected '::' after binding-attributes at %C");
4444 /* Check for C450. */
4445 if (!tb
->nopass
&& proc_if
== NULL
)
4447 gfc_error("NOPASS or explicit interface required at %C");
4451 /* Match PPC names. */
4455 m
= gfc_match_name (name
);
4458 else if (m
== MATCH_ERROR
)
4461 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
4464 /* Add current_attr to the symbol attributes. */
4465 if (gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4468 if (gfc_add_external (&c
->attr
, NULL
) == FAILURE
)
4471 if (gfc_add_proc (&c
->attr
, name
, NULL
) == FAILURE
)
4476 /* Set interface. */
4477 if (proc_if
!= NULL
)
4479 c
->ts
.interface
= proc_if
;
4480 c
->attr
.untyped
= 1;
4481 c
->attr
.if_source
= IFSRC_IFBODY
;
4483 else if (ts
.type
!= BT_UNKNOWN
)
4486 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4487 c
->ts
.interface
->ts
= ts
;
4488 c
->ts
.interface
->attr
.function
= 1;
4489 c
->attr
.function
= c
->ts
.interface
->attr
.function
;
4490 c
->attr
.if_source
= IFSRC_UNKNOWN
;
4493 if (gfc_match (" =>") == MATCH_YES
)
4495 m
= gfc_match_null (&initializer
);
4498 gfc_error ("Pointer initialization requires a NULL() at %C");
4501 if (gfc_pure (NULL
))
4503 gfc_error ("Initialization of pointer at %C is not allowed in "
4504 "a PURE procedure");
4509 gfc_free_expr (initializer
);
4512 c
->initializer
= initializer
;
4515 if (gfc_match_eos () == MATCH_YES
)
4517 if (gfc_match_char (',') != MATCH_YES
)
4522 gfc_error ("Syntax error in procedure pointer component at %C");
4527 /* Match a PROCEDURE declaration inside an interface (R1206). */
4530 match_procedure_in_interface (void)
4534 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4536 if (current_interface
.type
== INTERFACE_NAMELESS
4537 || current_interface
.type
== INTERFACE_ABSTRACT
)
4539 gfc_error ("PROCEDURE at %C must be in a generic interface");
4545 m
= gfc_match_name (name
);
4548 else if (m
== MATCH_ERROR
)
4550 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
4553 if (gfc_add_interface (sym
) == FAILURE
)
4556 if (gfc_match_eos () == MATCH_YES
)
4558 if (gfc_match_char (',') != MATCH_YES
)
4565 gfc_error ("Syntax error in PROCEDURE statement at %C");
4570 /* General matcher for PROCEDURE declarations. */
4572 static match
match_procedure_in_type (void);
4575 gfc_match_procedure (void)
4579 switch (gfc_current_state ())
4584 case COMP_SUBROUTINE
:
4586 m
= match_procedure_decl ();
4588 case COMP_INTERFACE
:
4589 m
= match_procedure_in_interface ();
4592 m
= match_ppc_decl ();
4594 case COMP_DERIVED_CONTAINS
:
4595 m
= match_procedure_in_type ();
4604 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROCEDURE statement at %C")
4612 /* Warn if a matched procedure has the same name as an intrinsic; this is
4613 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4614 parser-state-stack to find out whether we're in a module. */
4617 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
4621 in_module
= (gfc_state_stack
->previous
4622 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
4624 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
4628 /* Match a function declaration. */
4631 gfc_match_function_decl (void)
4633 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4634 gfc_symbol
*sym
, *result
;
4638 match found_match
; /* Status returned by match func. */
4640 if (gfc_current_state () != COMP_NONE
4641 && gfc_current_state () != COMP_INTERFACE
4642 && gfc_current_state () != COMP_CONTAINS
)
4645 gfc_clear_ts (¤t_ts
);
4647 old_loc
= gfc_current_locus
;
4649 m
= gfc_match_prefix (¤t_ts
);
4652 gfc_current_locus
= old_loc
;
4656 if (gfc_match ("function% %n", name
) != MATCH_YES
)
4658 gfc_current_locus
= old_loc
;
4661 if (get_proc_name (name
, &sym
, false))
4664 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4667 gfc_new_block
= sym
;
4669 m
= gfc_match_formal_arglist (sym
, 0, 0);
4672 gfc_error ("Expected formal argument list in function "
4673 "definition at %C");
4677 else if (m
== MATCH_ERROR
)
4682 /* According to the draft, the bind(c) and result clause can
4683 come in either order after the formal_arg_list (i.e., either
4684 can be first, both can exist together or by themselves or neither
4685 one). Therefore, the match_result can't match the end of the
4686 string, and check for the bind(c) or result clause in either order. */
4687 found_match
= gfc_match_eos ();
4689 /* Make sure that it isn't already declared as BIND(C). If it is, it
4690 must have been marked BIND(C) with a BIND(C) attribute and that is
4691 not allowed for procedures. */
4692 if (sym
->attr
.is_bind_c
== 1)
4694 sym
->attr
.is_bind_c
= 0;
4695 if (sym
->old_symbol
!= NULL
)
4696 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4697 "variables or common blocks",
4698 &(sym
->old_symbol
->declared_at
));
4700 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4701 "variables or common blocks", &gfc_current_locus
);
4704 if (found_match
!= MATCH_YES
)
4706 /* If we haven't found the end-of-statement, look for a suffix. */
4707 suffix_match
= gfc_match_suffix (sym
, &result
);
4708 if (suffix_match
== MATCH_YES
)
4709 /* Need to get the eos now. */
4710 found_match
= gfc_match_eos ();
4712 found_match
= suffix_match
;
4715 if(found_match
!= MATCH_YES
)
4719 /* Make changes to the symbol. */
4722 if (gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4725 if (gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
4726 || copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
4729 /* Delay matching the function characteristics until after the
4730 specification block by signalling kind=-1. */
4731 sym
->declared_at
= old_loc
;
4732 if (current_ts
.type
!= BT_UNKNOWN
)
4733 current_ts
.kind
= -1;
4735 current_ts
.kind
= 0;
4739 if (current_ts
.type
!= BT_UNKNOWN
4740 && gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4746 if (current_ts
.type
!= BT_UNKNOWN
4747 && gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
)
4750 sym
->result
= result
;
4753 /* Warn if this procedure has the same name as an intrinsic. */
4754 warn_intrinsic_shadow (sym
, true);
4760 gfc_current_locus
= old_loc
;
4765 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4766 pass the name of the entry, rather than the gfc_current_block name, and
4767 to return false upon finding an existing global entry. */
4770 add_global_entry (const char *name
, int sub
)
4773 enum gfc_symbol_type type
;
4775 s
= gfc_get_gsymbol(name
);
4776 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
4779 || (s
->type
!= GSYM_UNKNOWN
4780 && s
->type
!= type
))
4781 gfc_global_used(s
, NULL
);
4785 s
->where
= gfc_current_locus
;
4787 s
->ns
= gfc_current_ns
;
4794 /* Match an ENTRY statement. */
4797 gfc_match_entry (void)
4802 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4803 gfc_compile_state state
;
4807 bool module_procedure
;
4811 m
= gfc_match_name (name
);
4815 state
= gfc_current_state ();
4816 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
4821 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4824 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4826 case COMP_BLOCK_DATA
:
4827 gfc_error ("ENTRY statement at %C cannot appear within "
4830 case COMP_INTERFACE
:
4831 gfc_error ("ENTRY statement at %C cannot appear within "
4835 gfc_error ("ENTRY statement at %C cannot appear within "
4836 "a DERIVED TYPE block");
4839 gfc_error ("ENTRY statement at %C cannot appear within "
4840 "an IF-THEN block");
4843 gfc_error ("ENTRY statement at %C cannot appear within "
4847 gfc_error ("ENTRY statement at %C cannot appear within "
4851 gfc_error ("ENTRY statement at %C cannot appear within "
4855 gfc_error ("ENTRY statement at %C cannot appear within "
4859 gfc_error ("ENTRY statement at %C cannot appear within "
4860 "a contained subprogram");
4863 gfc_internal_error ("gfc_match_entry(): Bad state");
4868 module_procedure
= gfc_current_ns
->parent
!= NULL
4869 && gfc_current_ns
->parent
->proc_name
4870 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
4873 if (gfc_current_ns
->parent
!= NULL
4874 && gfc_current_ns
->parent
->proc_name
4875 && !module_procedure
)
4877 gfc_error("ENTRY statement at %C cannot appear in a "
4878 "contained procedure");
4882 /* Module function entries need special care in get_proc_name
4883 because previous references within the function will have
4884 created symbols attached to the current namespace. */
4885 if (get_proc_name (name
, &entry
,
4886 gfc_current_ns
->parent
!= NULL
4887 && module_procedure
))
4890 proc
= gfc_current_block ();
4892 /* Make sure that it isn't already declared as BIND(C). If it is, it
4893 must have been marked BIND(C) with a BIND(C) attribute and that is
4894 not allowed for procedures. */
4895 if (entry
->attr
.is_bind_c
== 1)
4897 entry
->attr
.is_bind_c
= 0;
4898 if (entry
->old_symbol
!= NULL
)
4899 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4900 "variables or common blocks",
4901 &(entry
->old_symbol
->declared_at
));
4903 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4904 "variables or common blocks", &gfc_current_locus
);
4907 /* Check what next non-whitespace character is so we can tell if there
4908 is the required parens if we have a BIND(C). */
4909 gfc_gobble_whitespace ();
4910 peek_char
= gfc_peek_ascii_char ();
4912 if (state
== COMP_SUBROUTINE
)
4914 /* An entry in a subroutine. */
4915 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 1))
4918 m
= gfc_match_formal_arglist (entry
, 0, 1);
4922 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4923 never be an internal procedure. */
4924 is_bind_c
= gfc_match_bind_c (entry
, true);
4925 if (is_bind_c
== MATCH_ERROR
)
4927 if (is_bind_c
== MATCH_YES
)
4929 if (peek_char
!= '(')
4931 gfc_error ("Missing required parentheses before BIND(C) at %C");
4934 if (gfc_add_is_bind_c (&(entry
->attr
), entry
->name
, &(entry
->declared_at
), 1)
4939 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4940 || gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4945 /* An entry in a function.
4946 We need to take special care because writing
4951 ENTRY f() RESULT (r)
4953 ENTRY f RESULT (r). */
4954 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 0))
4957 old_loc
= gfc_current_locus
;
4958 if (gfc_match_eos () == MATCH_YES
)
4960 gfc_current_locus
= old_loc
;
4961 /* Match the empty argument list, and add the interface to
4963 m
= gfc_match_formal_arglist (entry
, 0, 1);
4966 m
= gfc_match_formal_arglist (entry
, 0, 0);
4973 if (gfc_match_eos () == MATCH_YES
)
4975 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4976 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4979 entry
->result
= entry
;
4983 m
= gfc_match_suffix (entry
, &result
);
4985 gfc_syntax_error (ST_ENTRY
);
4991 if (gfc_add_result (&result
->attr
, result
->name
, NULL
) == FAILURE
4992 || gfc_add_entry (&entry
->attr
, result
->name
, NULL
) == FAILURE
4993 || gfc_add_function (&entry
->attr
, result
->name
, NULL
)
4996 entry
->result
= result
;
5000 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
5001 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
5003 entry
->result
= entry
;
5008 if (gfc_match_eos () != MATCH_YES
)
5010 gfc_syntax_error (ST_ENTRY
);
5014 entry
->attr
.recursive
= proc
->attr
.recursive
;
5015 entry
->attr
.elemental
= proc
->attr
.elemental
;
5016 entry
->attr
.pure
= proc
->attr
.pure
;
5018 el
= gfc_get_entry_list ();
5020 el
->next
= gfc_current_ns
->entries
;
5021 gfc_current_ns
->entries
= el
;
5023 el
->id
= el
->next
->id
+ 1;
5027 new_st
.op
= EXEC_ENTRY
;
5028 new_st
.ext
.entry
= el
;
5034 /* Match a subroutine statement, including optional prefixes. */
5037 gfc_match_subroutine (void)
5039 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5044 bool allow_binding_name
;
5046 if (gfc_current_state () != COMP_NONE
5047 && gfc_current_state () != COMP_INTERFACE
5048 && gfc_current_state () != COMP_CONTAINS
)
5051 m
= gfc_match_prefix (NULL
);
5055 m
= gfc_match ("subroutine% %n", name
);
5059 if (get_proc_name (name
, &sym
, false))
5062 if (add_hidden_procptr_result (sym
) == SUCCESS
)
5065 gfc_new_block
= sym
;
5067 /* Check what next non-whitespace character is so we can tell if there
5068 is the required parens if we have a BIND(C). */
5069 gfc_gobble_whitespace ();
5070 peek_char
= gfc_peek_ascii_char ();
5072 if (gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
5075 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5078 /* Make sure that it isn't already declared as BIND(C). If it is, it
5079 must have been marked BIND(C) with a BIND(C) attribute and that is
5080 not allowed for procedures. */
5081 if (sym
->attr
.is_bind_c
== 1)
5083 sym
->attr
.is_bind_c
= 0;
5084 if (sym
->old_symbol
!= NULL
)
5085 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5086 "variables or common blocks",
5087 &(sym
->old_symbol
->declared_at
));
5089 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5090 "variables or common blocks", &gfc_current_locus
);
5093 /* C binding names are not allowed for internal procedures. */
5094 if (gfc_current_state () == COMP_CONTAINS
5095 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5096 allow_binding_name
= false;
5098 allow_binding_name
= true;
5100 /* Here, we are just checking if it has the bind(c) attribute, and if
5101 so, then we need to make sure it's all correct. If it doesn't,
5102 we still need to continue matching the rest of the subroutine line. */
5103 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5104 if (is_bind_c
== MATCH_ERROR
)
5106 /* There was an attempt at the bind(c), but it was wrong. An
5107 error message should have been printed w/in the gfc_match_bind_c
5108 so here we'll just return the MATCH_ERROR. */
5112 if (is_bind_c
== MATCH_YES
)
5114 /* The following is allowed in the Fortran 2008 draft. */
5115 if (gfc_current_state () == COMP_CONTAINS
5116 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5117 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
5118 "at %L may not be specified for an internal "
5119 "procedure", &gfc_current_locus
)
5123 if (peek_char
!= '(')
5125 gfc_error ("Missing required parentheses before BIND(C) at %C");
5128 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &(sym
->declared_at
), 1)
5133 if (gfc_match_eos () != MATCH_YES
)
5135 gfc_syntax_error (ST_SUBROUTINE
);
5139 if (copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
5142 /* Warn if it has the same name as an intrinsic. */
5143 warn_intrinsic_shadow (sym
, false);
5149 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5150 given, and set the binding label in either the given symbol (if not
5151 NULL), or in the current_ts. The symbol may be NULL because we may
5152 encounter the BIND(C) before the declaration itself. Return
5153 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5154 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5155 or MATCH_YES if the specifier was correct and the binding label and
5156 bind(c) fields were set correctly for the given symbol or the
5157 current_ts. If allow_binding_name is false, no binding name may be
5161 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5163 /* binding label, if exists */
5164 char binding_label
[GFC_MAX_SYMBOL_LEN
+ 1];
5168 /* Initialize the flag that specifies whether we encountered a NAME=
5169 specifier or not. */
5170 has_name_equals
= 0;
5172 /* Init the first char to nil so we can catch if we don't have
5173 the label (name attr) or the symbol name yet. */
5174 binding_label
[0] = '\0';
5176 /* This much we have to be able to match, in this order, if
5177 there is a bind(c) label. */
5178 if (gfc_match (" bind ( c ") != MATCH_YES
)
5181 /* Now see if there is a binding label, or if we've reached the
5182 end of the bind(c) attribute without one. */
5183 if (gfc_match_char (',') == MATCH_YES
)
5185 if (gfc_match (" name = ") != MATCH_YES
)
5187 gfc_error ("Syntax error in NAME= specifier for binding label "
5189 /* should give an error message here */
5193 has_name_equals
= 1;
5195 /* Get the opening quote. */
5196 double_quote
= MATCH_YES
;
5197 single_quote
= MATCH_YES
;
5198 double_quote
= gfc_match_char ('"');
5199 if (double_quote
!= MATCH_YES
)
5200 single_quote
= gfc_match_char ('\'');
5201 if (double_quote
!= MATCH_YES
&& single_quote
!= MATCH_YES
)
5203 gfc_error ("Syntax error in NAME= specifier for binding label "
5208 /* Grab the binding label, using functions that will not lower
5209 case the names automatically. */
5210 if (gfc_match_name_C (binding_label
) != MATCH_YES
)
5213 /* Get the closing quotation. */
5214 if (double_quote
== MATCH_YES
)
5216 if (gfc_match_char ('"') != MATCH_YES
)
5218 gfc_error ("Missing closing quote '\"' for binding label at %C");
5219 /* User started string with '"' so looked to match it. */
5225 if (gfc_match_char ('\'') != MATCH_YES
)
5227 gfc_error ("Missing closing quote '\'' for binding label at %C");
5228 /* User started string with "'" char. */
5234 /* Get the required right paren. */
5235 if (gfc_match_char (')') != MATCH_YES
)
5237 gfc_error ("Missing closing paren for binding label at %C");
5241 if (has_name_equals
&& !allow_binding_name
)
5243 gfc_error ("No binding name is allowed in BIND(C) at %C");
5247 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5249 gfc_error ("For dummy procedure %s, no binding name is "
5250 "allowed in BIND(C) at %C", sym
->name
);
5255 /* Save the binding label to the symbol. If sym is null, we're
5256 probably matching the typespec attributes of a declaration and
5257 haven't gotten the name yet, and therefore, no symbol yet. */
5258 if (binding_label
[0] != '\0')
5262 strcpy (sym
->binding_label
, binding_label
);
5265 strcpy (curr_binding_label
, binding_label
);
5267 else if (allow_binding_name
)
5269 /* No binding label, but if symbol isn't null, we
5270 can set the label for it here.
5271 If name="" or allow_binding_name is false, no C binding name is
5273 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
5274 strncpy (sym
->binding_label
, sym
->name
, strlen (sym
->name
) + 1);
5277 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
5278 && current_interface
.type
== INTERFACE_ABSTRACT
)
5280 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5288 /* Return nonzero if we're currently compiling a contained procedure. */
5291 contained_procedure (void)
5293 gfc_state_data
*s
= gfc_state_stack
;
5295 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
5296 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
5302 /* Set the kind of each enumerator. The kind is selected such that it is
5303 interoperable with the corresponding C enumeration type, making
5304 sure that -fshort-enums is honored. */
5309 enumerator_history
*current_history
= NULL
;
5313 if (max_enum
== NULL
|| enum_history
== NULL
)
5316 if (!flag_short_enums
)
5322 kind
= gfc_integer_kinds
[i
++].kind
;
5324 while (kind
< gfc_c_int_kind
5325 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
5328 current_history
= enum_history
;
5329 while (current_history
!= NULL
)
5331 current_history
->sym
->ts
.kind
= kind
;
5332 current_history
= current_history
->next
;
5337 /* Match any of the various end-block statements. Returns the type of
5338 END to the caller. The END INTERFACE, END IF, END DO and END
5339 SELECT statements cannot be replaced by a single END statement. */
5342 gfc_match_end (gfc_statement
*st
)
5344 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5345 gfc_compile_state state
;
5347 const char *block_name
;
5352 old_loc
= gfc_current_locus
;
5353 if (gfc_match ("end") != MATCH_YES
)
5356 state
= gfc_current_state ();
5357 block_name
= gfc_current_block () == NULL
5358 ? NULL
: gfc_current_block ()->name
;
5360 if (state
== COMP_CONTAINS
|| state
== COMP_DERIVED_CONTAINS
)
5362 state
= gfc_state_stack
->previous
->state
;
5363 block_name
= gfc_state_stack
->previous
->sym
== NULL
5364 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
5371 *st
= ST_END_PROGRAM
;
5372 target
= " program";
5376 case COMP_SUBROUTINE
:
5377 *st
= ST_END_SUBROUTINE
;
5378 target
= " subroutine";
5379 eos_ok
= !contained_procedure ();
5383 *st
= ST_END_FUNCTION
;
5384 target
= " function";
5385 eos_ok
= !contained_procedure ();
5388 case COMP_BLOCK_DATA
:
5389 *st
= ST_END_BLOCK_DATA
;
5390 target
= " block data";
5395 *st
= ST_END_MODULE
;
5400 case COMP_INTERFACE
:
5401 *st
= ST_END_INTERFACE
;
5402 target
= " interface";
5407 case COMP_DERIVED_CONTAINS
:
5426 *st
= ST_END_SELECT
;
5432 *st
= ST_END_FORALL
;
5447 last_initializer
= NULL
;
5449 gfc_free_enum_history ();
5453 gfc_error ("Unexpected END statement at %C");
5457 if (gfc_match_eos () == MATCH_YES
)
5461 /* We would have required END [something]. */
5462 gfc_error ("%s statement expected at %L",
5463 gfc_ascii_statement (*st
), &old_loc
);
5470 /* Verify that we've got the sort of end-block that we're expecting. */
5471 if (gfc_match (target
) != MATCH_YES
)
5473 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st
));
5477 /* If we're at the end, make sure a block name wasn't required. */
5478 if (gfc_match_eos () == MATCH_YES
)
5481 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
5482 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
)
5485 if (gfc_current_block () == NULL
)
5488 gfc_error ("Expected block name of '%s' in %s statement at %C",
5489 block_name
, gfc_ascii_statement (*st
));
5494 /* END INTERFACE has a special handler for its several possible endings. */
5495 if (*st
== ST_END_INTERFACE
)
5496 return gfc_match_end_interface ();
5498 /* We haven't hit the end of statement, so what is left must be an
5500 m
= gfc_match_space ();
5502 m
= gfc_match_name (name
);
5505 gfc_error ("Expected terminating name at %C");
5509 if (block_name
== NULL
)
5512 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
5514 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
5515 gfc_ascii_statement (*st
));
5518 /* Procedure pointer as function result. */
5519 else if (strcmp (block_name
, "ppr@") == 0
5520 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
5522 gfc_error ("Expected label '%s' for %s statement at %C",
5523 gfc_current_block ()->ns
->proc_name
->name
,
5524 gfc_ascii_statement (*st
));
5528 if (gfc_match_eos () == MATCH_YES
)
5532 gfc_syntax_error (*st
);
5535 gfc_current_locus
= old_loc
;
5541 /***************** Attribute declaration statements ****************/
5543 /* Set the attribute of a single variable. */
5548 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5556 m
= gfc_match_name (name
);
5560 if (find_special (name
, &sym
, false))
5563 var_locus
= gfc_current_locus
;
5565 /* Deal with possible array specification for certain attributes. */
5566 if (current_attr
.dimension
5567 || current_attr
.allocatable
5568 || current_attr
.pointer
5569 || current_attr
.target
)
5571 m
= gfc_match_array_spec (&as
);
5572 if (m
== MATCH_ERROR
)
5575 if (current_attr
.dimension
&& m
== MATCH_NO
)
5577 gfc_error ("Missing array specification at %L in DIMENSION "
5578 "statement", &var_locus
);
5583 if (current_attr
.dimension
&& sym
->value
)
5585 gfc_error ("Dimensions specified for %s at %L after its "
5586 "initialisation", sym
->name
, &var_locus
);
5591 if ((current_attr
.allocatable
|| current_attr
.pointer
)
5592 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
5594 gfc_error ("Array specification must be deferred at %L", &var_locus
);
5600 /* Update symbol table. DIMENSION attribute is set
5601 in gfc_set_array_spec(). */
5602 if (current_attr
.dimension
== 0
5603 && gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
) == FAILURE
)
5609 if (gfc_set_array_spec (sym
, as
, &var_locus
) == FAILURE
)
5615 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
5617 /* Fix the array spec. */
5618 m
= gfc_mod_pointee_as (sym
->as
);
5619 if (m
== MATCH_ERROR
)
5623 if (gfc_add_attribute (&sym
->attr
, &var_locus
) == FAILURE
)
5629 if ((current_attr
.external
|| current_attr
.intrinsic
)
5630 && sym
->attr
.flavor
!= FL_PROCEDURE
5631 && gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
) == FAILURE
)
5637 add_hidden_procptr_result (sym
);
5642 gfc_free_array_spec (as
);
5647 /* Generic attribute declaration subroutine. Used for attributes that
5648 just have a list of names. */
5655 /* Gobble the optional double colon, by simply ignoring the result
5665 if (gfc_match_eos () == MATCH_YES
)
5671 if (gfc_match_char (',') != MATCH_YES
)
5673 gfc_error ("Unexpected character in variable list at %C");
5683 /* This routine matches Cray Pointer declarations of the form:
5684 pointer ( <pointer>, <pointee> )
5686 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5687 The pointer, if already declared, should be an integer. Otherwise, we
5688 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5689 be either a scalar, or an array declaration. No space is allocated for
5690 the pointee. For the statement
5691 pointer (ipt, ar(10))
5692 any subsequent uses of ar will be translated (in C-notation) as
5693 ar(i) => ((<type> *) ipt)(i)
5694 After gimplification, pointee variable will disappear in the code. */
5697 cray_pointer_decl (void)
5701 gfc_symbol
*cptr
; /* Pointer symbol. */
5702 gfc_symbol
*cpte
; /* Pointee symbol. */
5708 if (gfc_match_char ('(') != MATCH_YES
)
5710 gfc_error ("Expected '(' at %C");
5714 /* Match pointer. */
5715 var_locus
= gfc_current_locus
;
5716 gfc_clear_attr (¤t_attr
);
5717 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
5718 current_ts
.type
= BT_INTEGER
;
5719 current_ts
.kind
= gfc_index_integer_kind
;
5721 m
= gfc_match_symbol (&cptr
, 0);
5724 gfc_error ("Expected variable name at %C");
5728 if (gfc_add_cray_pointer (&cptr
->attr
, &var_locus
) == FAILURE
)
5731 gfc_set_sym_referenced (cptr
);
5733 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
5735 cptr
->ts
.type
= BT_INTEGER
;
5736 cptr
->ts
.kind
= gfc_index_integer_kind
;
5738 else if (cptr
->ts
.type
!= BT_INTEGER
)
5740 gfc_error ("Cray pointer at %C must be an integer");
5743 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
5744 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5745 " memory addresses require %d bytes",
5746 cptr
->ts
.kind
, gfc_index_integer_kind
);
5748 if (gfc_match_char (',') != MATCH_YES
)
5750 gfc_error ("Expected \",\" at %C");
5754 /* Match Pointee. */
5755 var_locus
= gfc_current_locus
;
5756 gfc_clear_attr (¤t_attr
);
5757 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
5758 current_ts
.type
= BT_UNKNOWN
;
5759 current_ts
.kind
= 0;
5761 m
= gfc_match_symbol (&cpte
, 0);
5764 gfc_error ("Expected variable name at %C");
5768 /* Check for an optional array spec. */
5769 m
= gfc_match_array_spec (&as
);
5770 if (m
== MATCH_ERROR
)
5772 gfc_free_array_spec (as
);
5775 else if (m
== MATCH_NO
)
5777 gfc_free_array_spec (as
);
5781 if (gfc_add_cray_pointee (&cpte
->attr
, &var_locus
) == FAILURE
)
5784 gfc_set_sym_referenced (cpte
);
5786 if (cpte
->as
== NULL
)
5788 if (gfc_set_array_spec (cpte
, as
, &var_locus
) == FAILURE
)
5789 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5791 else if (as
!= NULL
)
5793 gfc_error ("Duplicate array spec for Cray pointee at %C");
5794 gfc_free_array_spec (as
);
5800 if (cpte
->as
!= NULL
)
5802 /* Fix array spec. */
5803 m
= gfc_mod_pointee_as (cpte
->as
);
5804 if (m
== MATCH_ERROR
)
5808 /* Point the Pointee at the Pointer. */
5809 cpte
->cp_pointer
= cptr
;
5811 if (gfc_match_char (')') != MATCH_YES
)
5813 gfc_error ("Expected \")\" at %C");
5816 m
= gfc_match_char (',');
5818 done
= true; /* Stop searching for more declarations. */
5822 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
5823 || gfc_match_eos () != MATCH_YES
)
5825 gfc_error ("Expected \",\" or end of statement at %C");
5833 gfc_match_external (void)
5836 gfc_clear_attr (¤t_attr
);
5837 current_attr
.external
= 1;
5839 return attr_decl ();
5844 gfc_match_intent (void)
5848 intent
= match_intent_spec ();
5849 if (intent
== INTENT_UNKNOWN
)
5852 gfc_clear_attr (¤t_attr
);
5853 current_attr
.intent
= intent
;
5855 return attr_decl ();
5860 gfc_match_intrinsic (void)
5863 gfc_clear_attr (¤t_attr
);
5864 current_attr
.intrinsic
= 1;
5866 return attr_decl ();
5871 gfc_match_optional (void)
5874 gfc_clear_attr (¤t_attr
);
5875 current_attr
.optional
= 1;
5877 return attr_decl ();
5882 gfc_match_pointer (void)
5884 gfc_gobble_whitespace ();
5885 if (gfc_peek_ascii_char () == '(')
5887 if (!gfc_option
.flag_cray_pointer
)
5889 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5893 return cray_pointer_decl ();
5897 gfc_clear_attr (¤t_attr
);
5898 current_attr
.pointer
= 1;
5900 return attr_decl ();
5906 gfc_match_allocatable (void)
5908 gfc_clear_attr (¤t_attr
);
5909 current_attr
.allocatable
= 1;
5911 return attr_decl ();
5916 gfc_match_dimension (void)
5918 gfc_clear_attr (¤t_attr
);
5919 current_attr
.dimension
= 1;
5921 return attr_decl ();
5926 gfc_match_target (void)
5928 gfc_clear_attr (¤t_attr
);
5929 current_attr
.target
= 1;
5931 return attr_decl ();
5935 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5939 access_attr_decl (gfc_statement st
)
5941 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5942 interface_type type
;
5945 gfc_intrinsic_op op
;
5948 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
5953 m
= gfc_match_generic_spec (&type
, name
, &op
);
5956 if (m
== MATCH_ERROR
)
5961 case INTERFACE_NAMELESS
:
5962 case INTERFACE_ABSTRACT
:
5965 case INTERFACE_GENERIC
:
5966 if (gfc_get_symbol (name
, NULL
, &sym
))
5969 if (gfc_add_access (&sym
->attr
, (st
== ST_PUBLIC
)
5970 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
5971 sym
->name
, NULL
) == FAILURE
)
5976 case INTERFACE_INTRINSIC_OP
:
5977 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
5979 gfc_current_ns
->operator_access
[op
] =
5980 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
5984 gfc_error ("Access specification of the %s operator at %C has "
5985 "already been specified", gfc_op2string (op
));
5991 case INTERFACE_USER_OP
:
5992 uop
= gfc_get_uop (name
);
5994 if (uop
->access
== ACCESS_UNKNOWN
)
5996 uop
->access
= (st
== ST_PUBLIC
)
5997 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
6001 gfc_error ("Access specification of the .%s. operator at %C "
6002 "has already been specified", sym
->name
);
6009 if (gfc_match_char (',') == MATCH_NO
)
6013 if (gfc_match_eos () != MATCH_YES
)
6018 gfc_syntax_error (st
);
6026 gfc_match_protected (void)
6031 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6033 gfc_error ("PROTECTED at %C only allowed in specification "
6034 "part of a module");
6039 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED statement at %C")
6043 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6048 if (gfc_match_eos () == MATCH_YES
)
6053 m
= gfc_match_symbol (&sym
, 0);
6057 if (gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6070 if (gfc_match_eos () == MATCH_YES
)
6072 if (gfc_match_char (',') != MATCH_YES
)
6079 gfc_error ("Syntax error in PROTECTED statement at %C");
6084 /* The PRIVATE statement is a bit weird in that it can be an attribute
6085 declaration, but also works as a standalone statement inside of a
6086 type declaration or a module. */
6089 gfc_match_private (gfc_statement
*st
)
6092 if (gfc_match ("private") != MATCH_YES
)
6095 if (gfc_current_state () != COMP_MODULE
6096 && !(gfc_current_state () == COMP_DERIVED
6097 && gfc_state_stack
->previous
6098 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
6099 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6100 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
6101 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
6103 gfc_error ("PRIVATE statement at %C is only allowed in the "
6104 "specification part of a module");
6108 if (gfc_current_state () == COMP_DERIVED
)
6110 if (gfc_match_eos () == MATCH_YES
)
6116 gfc_syntax_error (ST_PRIVATE
);
6120 if (gfc_match_eos () == MATCH_YES
)
6127 return access_attr_decl (ST_PRIVATE
);
6132 gfc_match_public (gfc_statement
*st
)
6135 if (gfc_match ("public") != MATCH_YES
)
6138 if (gfc_current_state () != COMP_MODULE
)
6140 gfc_error ("PUBLIC statement at %C is only allowed in the "
6141 "specification part of a module");
6145 if (gfc_match_eos () == MATCH_YES
)
6152 return access_attr_decl (ST_PUBLIC
);
6156 /* Workhorse for gfc_match_parameter. */
6165 m
= gfc_match_symbol (&sym
, 0);
6167 gfc_error ("Expected variable name at %C in PARAMETER statement");
6172 if (gfc_match_char ('=') == MATCH_NO
)
6174 gfc_error ("Expected = sign in PARAMETER statement at %C");
6178 m
= gfc_match_init_expr (&init
);
6180 gfc_error ("Expected expression at %C in PARAMETER statement");
6184 if (sym
->ts
.type
== BT_UNKNOWN
6185 && gfc_set_default_type (sym
, 1, NULL
) == FAILURE
)
6191 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
6192 || gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
) == FAILURE
)
6200 gfc_error ("Initializing already initialized variable at %C");
6205 if (sym
->ts
.type
== BT_CHARACTER
6206 && sym
->ts
.u
.cl
!= NULL
6207 && sym
->ts
.u
.cl
->length
!= NULL
6208 && sym
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
6209 && init
->expr_type
== EXPR_CONSTANT
6210 && init
->ts
.type
== BT_CHARACTER
)
6211 gfc_set_constant_character_len (
6212 mpz_get_si (sym
->ts
.u
.cl
->length
->value
.integer
), init
, -1);
6213 else if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.u
.cl
!= NULL
6214 && sym
->ts
.u
.cl
->length
== NULL
)
6217 if (init
->expr_type
== EXPR_CONSTANT
)
6219 clen
= init
->value
.character
.length
;
6220 sym
->ts
.u
.cl
->length
= gfc_int_expr (clen
);
6222 else if (init
->expr_type
== EXPR_ARRAY
)
6224 gfc_expr
*p
= init
->value
.constructor
->expr
;
6225 clen
= p
->value
.character
.length
;
6226 sym
->ts
.u
.cl
->length
= gfc_int_expr (clen
);
6228 else if (init
->ts
.u
.cl
&& init
->ts
.u
.cl
->length
)
6229 sym
->ts
.u
.cl
->length
= gfc_copy_expr (sym
->value
->ts
.u
.cl
->length
);
6236 gfc_free_expr (init
);
6241 /* Match a parameter statement, with the weird syntax that these have. */
6244 gfc_match_parameter (void)
6248 if (gfc_match_char ('(') == MATCH_NO
)
6257 if (gfc_match (" )%t") == MATCH_YES
)
6260 if (gfc_match_char (',') != MATCH_YES
)
6262 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6272 /* Save statements have a special syntax. */
6275 gfc_match_save (void)
6277 char n
[GFC_MAX_SYMBOL_LEN
+1];
6282 if (gfc_match_eos () == MATCH_YES
)
6284 if (gfc_current_ns
->seen_save
)
6286 if (gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
6287 "follows previous SAVE statement")
6292 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
6296 if (gfc_current_ns
->save_all
)
6298 if (gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
6299 "blanket SAVE statement")
6308 m
= gfc_match_symbol (&sym
, 0);
6312 if (gfc_add_save (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6324 m
= gfc_match (" / %n /", &n
);
6325 if (m
== MATCH_ERROR
)
6330 c
= gfc_get_common (n
, 0);
6333 gfc_current_ns
->seen_save
= 1;
6336 if (gfc_match_eos () == MATCH_YES
)
6338 if (gfc_match_char (',') != MATCH_YES
)
6345 gfc_error ("Syntax error in SAVE statement at %C");
6351 gfc_match_value (void)
6356 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE statement at %C")
6360 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6365 if (gfc_match_eos () == MATCH_YES
)
6370 m
= gfc_match_symbol (&sym
, 0);
6374 if (gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6387 if (gfc_match_eos () == MATCH_YES
)
6389 if (gfc_match_char (',') != MATCH_YES
)
6396 gfc_error ("Syntax error in VALUE statement at %C");
6402 gfc_match_volatile (void)
6407 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VOLATILE statement at %C")
6411 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6416 if (gfc_match_eos () == MATCH_YES
)
6421 /* VOLATILE is special because it can be added to host-associated
6423 m
= gfc_match_symbol (&sym
, 1);
6427 if (gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6440 if (gfc_match_eos () == MATCH_YES
)
6442 if (gfc_match_char (',') != MATCH_YES
)
6449 gfc_error ("Syntax error in VOLATILE statement at %C");
6454 /* Match a module procedure statement. Note that we have to modify
6455 symbols in the parent's namespace because the current one was there
6456 to receive symbols that are in an interface's formal argument list. */
6459 gfc_match_modproc (void)
6461 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6464 gfc_namespace
*module_ns
;
6465 gfc_interface
*old_interface_head
, *interface
;
6467 if (gfc_state_stack
->state
!= COMP_INTERFACE
6468 || gfc_state_stack
->previous
== NULL
6469 || current_interface
.type
== INTERFACE_NAMELESS
6470 || current_interface
.type
== INTERFACE_ABSTRACT
)
6472 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6477 module_ns
= gfc_current_ns
->parent
;
6478 for (; module_ns
; module_ns
= module_ns
->parent
)
6479 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
)
6482 if (module_ns
== NULL
)
6485 /* Store the current state of the interface. We will need it if we
6486 end up with a syntax error and need to recover. */
6487 old_interface_head
= gfc_current_interface_head ();
6493 m
= gfc_match_name (name
);
6499 /* Check for syntax error before starting to add symbols to the
6500 current namespace. */
6501 if (gfc_match_eos () == MATCH_YES
)
6503 if (!last
&& gfc_match_char (',') != MATCH_YES
)
6506 /* Now we're sure the syntax is valid, we process this item
6508 if (gfc_get_symbol (name
, module_ns
, &sym
))
6511 if (sym
->attr
.proc
!= PROC_MODULE
6512 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
6513 sym
->name
, NULL
) == FAILURE
)
6516 if (gfc_add_interface (sym
) == FAILURE
)
6519 sym
->attr
.mod_proc
= 1;
6528 /* Restore the previous state of the interface. */
6529 interface
= gfc_current_interface_head ();
6530 gfc_set_current_interface_head (old_interface_head
);
6532 /* Free the new interfaces. */
6533 while (interface
!= old_interface_head
)
6535 gfc_interface
*i
= interface
->next
;
6536 gfc_free (interface
);
6540 /* And issue a syntax error. */
6541 gfc_syntax_error (ST_MODULE_PROC
);
6546 /* Check a derived type that is being extended. */
6548 check_extended_derived_type (char *name
)
6550 gfc_symbol
*extended
;
6552 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
6554 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6560 gfc_error ("No such symbol in TYPE definition at %C");
6564 if (extended
->attr
.flavor
!= FL_DERIVED
)
6566 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6567 "derived type", name
);
6571 if (extended
->attr
.is_bind_c
)
6573 gfc_error ("'%s' cannot be extended at %C because it "
6574 "is BIND(C)", extended
->name
);
6578 if (extended
->attr
.sequence
)
6580 gfc_error ("'%s' cannot be extended at %C because it "
6581 "is a SEQUENCE type", extended
->name
);
6589 /* Match the optional attribute specifiers for a type declaration.
6590 Return MATCH_ERROR if an error is encountered in one of the handled
6591 attributes (public, private, bind(c)), MATCH_NO if what's found is
6592 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6593 checking on attribute conflicts needs to be done. */
6596 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
6598 /* See if the derived type is marked as private. */
6599 if (gfc_match (" , private") == MATCH_YES
)
6601 if (gfc_current_state () != COMP_MODULE
)
6603 gfc_error ("Derived type at %C can only be PRIVATE in the "
6604 "specification part of a module");
6608 if (gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
) == FAILURE
)
6611 else if (gfc_match (" , public") == MATCH_YES
)
6613 if (gfc_current_state () != COMP_MODULE
)
6615 gfc_error ("Derived type at %C can only be PUBLIC in the "
6616 "specification part of a module");
6620 if (gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
) == FAILURE
)
6623 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
6625 /* If the type is defined to be bind(c) it then needs to make
6626 sure that all fields are interoperable. This will
6627 need to be a semantic check on the finished derived type.
6628 See 15.2.3 (lines 9-12) of F2003 draft. */
6629 if (gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0) != SUCCESS
)
6632 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6634 else if (gfc_match (" , abstract") == MATCH_YES
)
6636 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ABSTRACT type at %C")
6640 if (gfc_add_abstract (attr
, &gfc_current_locus
) == FAILURE
)
6643 else if (name
&& gfc_match(" , extends ( %n )", name
) == MATCH_YES
)
6645 if (gfc_add_extension (attr
, &gfc_current_locus
) == FAILURE
)
6651 /* If we get here, something matched. */
6656 /* Match the beginning of a derived type declaration. If a type name
6657 was the result of a function, then it is possible to have a symbol
6658 already to be known as a derived type yet have no components. */
6661 gfc_match_derived_decl (void)
6663 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6664 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
6665 symbol_attribute attr
;
6667 gfc_symbol
*extended
;
6669 match is_type_attr_spec
= MATCH_NO
;
6670 bool seen_attr
= false;
6672 if (gfc_current_state () == COMP_DERIVED
)
6677 gfc_clear_attr (&attr
);
6682 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
6683 if (is_type_attr_spec
== MATCH_ERROR
)
6685 if (is_type_attr_spec
== MATCH_YES
)
6687 } while (is_type_attr_spec
== MATCH_YES
);
6689 /* Deal with derived type extensions. The extension attribute has
6690 been added to 'attr' but now the parent type must be found and
6693 extended
= check_extended_derived_type (parent
);
6695 if (parent
[0] && !extended
)
6698 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
6700 gfc_error ("Expected :: in TYPE definition at %C");
6704 m
= gfc_match (" %n%t", name
);
6708 /* Make sure the name is not the name of an intrinsic type. */
6709 if (gfc_is_intrinsic_typename (name
))
6711 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6716 if (gfc_get_symbol (name
, NULL
, &sym
))
6719 if (sym
->ts
.type
!= BT_UNKNOWN
)
6721 gfc_error ("Derived type name '%s' at %C already has a basic type "
6722 "of %s", sym
->name
, gfc_typename (&sym
->ts
));
6726 /* The symbol may already have the derived attribute without the
6727 components. The ways this can happen is via a function
6728 definition, an INTRINSIC statement or a subtype in another
6729 derived type that is a pointer. The first part of the AND clause
6730 is true if the symbol is not the return value of a function. */
6731 if (sym
->attr
.flavor
!= FL_DERIVED
6732 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
6735 if (sym
->components
!= NULL
|| sym
->attr
.zero_comp
)
6737 gfc_error ("Derived type definition of '%s' at %C has already been "
6738 "defined", sym
->name
);
6742 if (attr
.access
!= ACCESS_UNKNOWN
6743 && gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
) == FAILURE
)
6746 /* See if the derived type was labeled as bind(c). */
6747 if (attr
.is_bind_c
!= 0)
6748 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
6750 /* Construct the f2k_derived namespace if it is not yet there. */
6751 if (!sym
->f2k_derived
)
6752 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
6754 if (extended
&& !sym
->components
)
6759 /* Add the extended derived type as the first component. */
6760 gfc_add_component (sym
, parent
, &p
);
6761 sym
->attr
.extension
= attr
.extension
;
6763 gfc_set_sym_referenced (extended
);
6765 p
->ts
.type
= BT_DERIVED
;
6766 p
->ts
.u
.derived
= extended
;
6767 p
->initializer
= gfc_default_initializer (&p
->ts
);
6769 /* Provide the links between the extended type and its extension. */
6770 if (!extended
->f2k_derived
)
6771 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
6772 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
6776 /* Take over the ABSTRACT attribute. */
6777 sym
->attr
.abstract
= attr
.abstract
;
6779 gfc_new_block
= sym
;
6785 /* Cray Pointees can be declared as:
6786 pointer (ipt, a (n,m,...,*))
6787 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6788 cheat and set a constant bound of 1 for the last dimension, if this
6789 is the case. Since there is no bounds-checking for Cray Pointees,
6790 this will be okay. */
6793 gfc_mod_pointee_as (gfc_array_spec
*as
)
6795 as
->cray_pointee
= true; /* This will be useful to know later. */
6796 if (as
->type
== AS_ASSUMED_SIZE
)
6798 as
->type
= AS_EXPLICIT
;
6799 as
->upper
[as
->rank
- 1] = gfc_int_expr (1);
6800 as
->cp_was_assumed
= true;
6802 else if (as
->type
== AS_ASSUMED_SHAPE
)
6804 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6811 /* Match the enum definition statement, here we are trying to match
6812 the first line of enum definition statement.
6813 Returns MATCH_YES if match is found. */
6816 gfc_match_enum (void)
6820 m
= gfc_match_eos ();
6824 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ENUM and ENUMERATOR at %C")
6832 /* Returns an initializer whose value is one higher than the value of the
6833 LAST_INITIALIZER argument. If the argument is NULL, the
6834 initializers value will be set to zero. The initializer's kind
6835 will be set to gfc_c_int_kind.
6837 If -fshort-enums is given, the appropriate kind will be selected
6838 later after all enumerators have been parsed. A warning is issued
6839 here if an initializer exceeds gfc_c_int_kind. */
6842 enum_initializer (gfc_expr
*last_initializer
, locus where
)
6846 result
= gfc_get_expr ();
6847 result
->expr_type
= EXPR_CONSTANT
;
6848 result
->ts
.type
= BT_INTEGER
;
6849 result
->ts
.kind
= gfc_c_int_kind
;
6850 result
->where
= where
;
6852 mpz_init (result
->value
.integer
);
6854 if (last_initializer
!= NULL
)
6856 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
6857 result
->where
= last_initializer
->where
;
6859 if (gfc_check_integer_range (result
->value
.integer
,
6860 gfc_c_int_kind
) != ARITH_OK
)
6862 gfc_error ("Enumerator exceeds the C integer type at %C");
6868 /* Control comes here, if it's the very first enumerator and no
6869 initializer has been given. It will be initialized to zero. */
6870 mpz_set_si (result
->value
.integer
, 0);
6877 /* Match a variable name with an optional initializer. When this
6878 subroutine is called, a variable is expected to be parsed next.
6879 Depending on what is happening at the moment, updates either the
6880 symbol table or the current interface. */
6883 enumerator_decl (void)
6885 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6886 gfc_expr
*initializer
;
6887 gfc_array_spec
*as
= NULL
;
6895 old_locus
= gfc_current_locus
;
6897 /* When we get here, we've just matched a list of attributes and
6898 maybe a type and a double colon. The next thing we expect to see
6899 is the name of the symbol. */
6900 m
= gfc_match_name (name
);
6904 var_locus
= gfc_current_locus
;
6906 /* OK, we've successfully matched the declaration. Now put the
6907 symbol in the current namespace. If we fail to create the symbol,
6909 if (build_sym (name
, NULL
, &as
, &var_locus
) == FAILURE
)
6915 /* The double colon must be present in order to have initializers.
6916 Otherwise the statement is ambiguous with an assignment statement. */
6919 if (gfc_match_char ('=') == MATCH_YES
)
6921 m
= gfc_match_init_expr (&initializer
);
6924 gfc_error ("Expected an initialization expression at %C");
6933 /* If we do not have an initializer, the initialization value of the
6934 previous enumerator (stored in last_initializer) is incremented
6935 by 1 and is used to initialize the current enumerator. */
6936 if (initializer
== NULL
)
6937 initializer
= enum_initializer (last_initializer
, old_locus
);
6939 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
6941 gfc_error("ENUMERATOR %L not initialized with integer expression",
6944 gfc_free_enum_history ();
6948 /* Store this current initializer, for the next enumerator variable
6949 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6950 use last_initializer below. */
6951 last_initializer
= initializer
;
6952 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
6954 /* Maintain enumerator history. */
6955 gfc_find_symbol (name
, NULL
, 0, &sym
);
6956 create_enum_history (sym
, last_initializer
);
6958 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
6961 /* Free stuff up and return. */
6962 gfc_free_expr (initializer
);
6968 /* Match the enumerator definition statement. */
6971 gfc_match_enumerator_def (void)
6976 gfc_clear_ts (¤t_ts
);
6978 m
= gfc_match (" enumerator");
6982 m
= gfc_match (" :: ");
6983 if (m
== MATCH_ERROR
)
6986 colon_seen
= (m
== MATCH_YES
);
6988 if (gfc_current_state () != COMP_ENUM
)
6990 gfc_error ("ENUM definition statement expected before %C");
6991 gfc_free_enum_history ();
6995 (¤t_ts
)->type
= BT_INTEGER
;
6996 (¤t_ts
)->kind
= gfc_c_int_kind
;
6998 gfc_clear_attr (¤t_attr
);
6999 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
7008 m
= enumerator_decl ();
7009 if (m
== MATCH_ERROR
)
7014 if (gfc_match_eos () == MATCH_YES
)
7016 if (gfc_match_char (',') != MATCH_YES
)
7020 if (gfc_current_state () == COMP_ENUM
)
7022 gfc_free_enum_history ();
7023 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7028 gfc_free_array_spec (current_as
);
7035 /* Match binding attributes. */
7038 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
7040 bool found_passing
= false;
7041 bool seen_ptr
= false;
7042 match m
= MATCH_YES
;
7044 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7045 this case the defaults are in there. */
7046 ba
->access
= ACCESS_UNKNOWN
;
7047 ba
->pass_arg
= NULL
;
7048 ba
->pass_arg_num
= 0;
7050 ba
->non_overridable
= 0;
7054 /* If we find a comma, we believe there are binding attributes. */
7055 m
= gfc_match_char (',');
7061 /* Access specifier. */
7063 m
= gfc_match (" public");
7064 if (m
== MATCH_ERROR
)
7068 if (ba
->access
!= ACCESS_UNKNOWN
)
7070 gfc_error ("Duplicate access-specifier at %C");
7074 ba
->access
= ACCESS_PUBLIC
;
7078 m
= gfc_match (" private");
7079 if (m
== MATCH_ERROR
)
7083 if (ba
->access
!= ACCESS_UNKNOWN
)
7085 gfc_error ("Duplicate access-specifier at %C");
7089 ba
->access
= ACCESS_PRIVATE
;
7093 /* If inside GENERIC, the following is not allowed. */
7098 m
= gfc_match (" nopass");
7099 if (m
== MATCH_ERROR
)
7105 gfc_error ("Binding attributes already specify passing,"
7106 " illegal NOPASS at %C");
7110 found_passing
= true;
7115 /* PASS possibly including argument. */
7116 m
= gfc_match (" pass");
7117 if (m
== MATCH_ERROR
)
7121 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
7125 gfc_error ("Binding attributes already specify passing,"
7126 " illegal PASS at %C");
7130 m
= gfc_match (" ( %n )", arg
);
7131 if (m
== MATCH_ERROR
)
7134 ba
->pass_arg
= gfc_get_string (arg
);
7135 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
7137 found_passing
= true;
7145 m
= gfc_match (" pointer");
7146 if (m
== MATCH_ERROR
)
7152 gfc_error ("Duplicate POINTER attribute at %C");
7162 /* NON_OVERRIDABLE flag. */
7163 m
= gfc_match (" non_overridable");
7164 if (m
== MATCH_ERROR
)
7168 if (ba
->non_overridable
)
7170 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7174 ba
->non_overridable
= 1;
7178 /* DEFERRED flag. */
7179 m
= gfc_match (" deferred");
7180 if (m
== MATCH_ERROR
)
7186 gfc_error ("Duplicate DEFERRED at %C");
7197 /* Nothing matching found. */
7199 gfc_error ("Expected access-specifier at %C");
7201 gfc_error ("Expected binding attribute at %C");
7204 while (gfc_match_char (',') == MATCH_YES
);
7206 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7207 if (ba
->non_overridable
&& ba
->deferred
)
7209 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7216 if (ba
->access
== ACCESS_UNKNOWN
)
7217 ba
->access
= gfc_typebound_default_access
;
7219 if (ppc
&& !seen_ptr
)
7221 gfc_error ("POINTER attribute is required for procedure pointer component"
7233 /* Match a PROCEDURE specific binding inside a derived type. */
7236 match_procedure_in_type (void)
7238 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7239 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
7240 char* target
= NULL
;
7241 gfc_typebound_proc
* tb
;
7249 /* Check current state. */
7250 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
7251 block
= gfc_state_stack
->previous
->sym
;
7254 /* Try to match PROCEDURE(interface). */
7255 if (gfc_match (" (") == MATCH_YES
)
7257 m
= gfc_match_name (target_buf
);
7258 if (m
== MATCH_ERROR
)
7262 gfc_error ("Interface-name expected after '(' at %C");
7266 if (gfc_match (" )") != MATCH_YES
)
7268 gfc_error ("')' expected at %C");
7272 target
= target_buf
;
7275 /* Construct the data structure. */
7276 tb
= gfc_get_typebound_proc ();
7277 tb
->where
= gfc_current_locus
;
7280 /* Match binding attributes. */
7281 m
= match_binding_attributes (tb
, false, false);
7282 if (m
== MATCH_ERROR
)
7284 seen_attrs
= (m
== MATCH_YES
);
7286 /* Check that attribute DEFERRED is given iff an interface is specified, which
7287 means target != NULL. */
7288 if (tb
->deferred
&& !target
)
7290 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7293 if (target
&& !tb
->deferred
)
7295 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7299 /* Match the colons. */
7300 m
= gfc_match (" ::");
7301 if (m
== MATCH_ERROR
)
7303 seen_colons
= (m
== MATCH_YES
);
7304 if (seen_attrs
&& !seen_colons
)
7306 gfc_error ("Expected '::' after binding-attributes at %C");
7310 /* Match the binding name. */
7311 m
= gfc_match_name (name
);
7312 if (m
== MATCH_ERROR
)
7316 gfc_error ("Expected binding name at %C");
7320 /* Try to match the '=> target', if it's there. */
7321 m
= gfc_match (" =>");
7322 if (m
== MATCH_ERROR
)
7328 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7334 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7339 m
= gfc_match_name (target_buf
);
7340 if (m
== MATCH_ERROR
)
7344 gfc_error ("Expected binding target after '=>' at %C");
7347 target
= target_buf
;
7350 /* Now we should have the end. */
7351 m
= gfc_match_eos ();
7352 if (m
== MATCH_ERROR
)
7356 gfc_error ("Junk after PROCEDURE declaration at %C");
7360 /* If no target was found, it has the same name as the binding. */
7364 /* Get the namespace to insert the symbols into. */
7365 ns
= block
->f2k_derived
;
7368 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7369 if (tb
->deferred
&& !block
->attr
.abstract
)
7371 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7376 /* See if we already have a binding with this name in the symtree which would
7377 be an error. If a GENERIC already targetted this binding, it may be
7378 already there but then typebound is still NULL. */
7379 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7380 if (stree
&& stree
->n
.tb
)
7382 gfc_error ("There's already a procedure with binding name '%s' for the"
7383 " derived type '%s' at %C", name
, block
->name
);
7387 /* Insert it and set attributes. */
7391 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7396 if (gfc_get_sym_tree (target
, gfc_current_ns
, &tb
->u
.specific
, false))
7398 gfc_set_sym_referenced (tb
->u
.specific
->n
.sym
);
7404 /* Match a GENERIC procedure binding inside a derived type. */
7407 gfc_match_generic (void)
7409 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7410 char bind_name
[GFC_MAX_SYMBOL_LEN
+ 16]; /* Allow space for OPERATOR(...). */
7412 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
7413 gfc_typebound_proc
* tb
;
7415 interface_type op_type
;
7416 gfc_intrinsic_op op
;
7419 /* Check current state. */
7420 if (gfc_current_state () == COMP_DERIVED
)
7422 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7425 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
7427 block
= gfc_state_stack
->previous
->sym
;
7428 ns
= block
->f2k_derived
;
7429 gcc_assert (block
&& ns
);
7431 /* See if we get an access-specifier. */
7432 m
= match_binding_attributes (&tbattr
, true, false);
7433 if (m
== MATCH_ERROR
)
7436 /* Now the colons, those are required. */
7437 if (gfc_match (" ::") != MATCH_YES
)
7439 gfc_error ("Expected '::' at %C");
7443 /* Match the binding name; depending on type (operator / generic) format
7444 it for future error messages into bind_name. */
7446 m
= gfc_match_generic_spec (&op_type
, name
, &op
);
7447 if (m
== MATCH_ERROR
)
7451 gfc_error ("Expected generic name or operator descriptor at %C");
7457 case INTERFACE_GENERIC
:
7458 snprintf (bind_name
, sizeof (bind_name
), "%s", name
);
7461 case INTERFACE_USER_OP
:
7462 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(.%s.)", name
);
7465 case INTERFACE_INTRINSIC_OP
:
7466 snprintf (bind_name
, sizeof (bind_name
), "OPERATOR(%s)",
7467 gfc_op2string (op
));
7474 /* Match the required =>. */
7475 if (gfc_match (" =>") != MATCH_YES
)
7477 gfc_error ("Expected '=>' at %C");
7481 /* Try to find existing GENERIC binding with this name / for this operator;
7482 if there is something, check that it is another GENERIC and then extend
7483 it rather than building a new node. Otherwise, create it and put it
7484 at the right position. */
7488 case INTERFACE_USER_OP
:
7489 case INTERFACE_GENERIC
:
7491 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
7494 st
= gfc_find_symtree (is_op
? ns
->tb_uop_root
: ns
->tb_sym_root
, name
);
7506 case INTERFACE_INTRINSIC_OP
:
7516 if (!tb
->is_generic
)
7518 gcc_assert (op_type
== INTERFACE_GENERIC
);
7519 gfc_error ("There's already a non-generic procedure with binding name"
7520 " '%s' for the derived type '%s' at %C",
7521 bind_name
, block
->name
);
7525 if (tb
->access
!= tbattr
.access
)
7527 gfc_error ("Binding at %C must have the same access as already"
7528 " defined binding '%s'", bind_name
);
7534 tb
= gfc_get_typebound_proc ();
7535 tb
->where
= gfc_current_locus
;
7536 tb
->access
= tbattr
.access
;
7538 tb
->u
.generic
= NULL
;
7542 case INTERFACE_GENERIC
:
7543 case INTERFACE_USER_OP
:
7545 const bool is_op
= (op_type
== INTERFACE_USER_OP
);
7548 st
= gfc_new_symtree (is_op
? &ns
->tb_uop_root
: &ns
->tb_sym_root
,
7556 case INTERFACE_INTRINSIC_OP
:
7565 /* Now, match all following names as specific targets. */
7568 gfc_symtree
* target_st
;
7569 gfc_tbp_generic
* target
;
7571 m
= gfc_match_name (name
);
7572 if (m
== MATCH_ERROR
)
7576 gfc_error ("Expected specific binding name at %C");
7580 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
7582 /* See if this is a duplicate specification. */
7583 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
7584 if (target_st
== target
->specific_st
)
7586 gfc_error ("'%s' already defined as specific binding for the"
7587 " generic '%s' at %C", name
, bind_name
);
7591 target
= gfc_get_tbp_generic ();
7592 target
->specific_st
= target_st
;
7593 target
->specific
= NULL
;
7594 target
->next
= tb
->u
.generic
;
7595 tb
->u
.generic
= target
;
7597 while (gfc_match (" ,") == MATCH_YES
);
7599 /* Here should be the end. */
7600 if (gfc_match_eos () != MATCH_YES
)
7602 gfc_error ("Junk after GENERIC binding at %C");
7613 /* Match a FINAL declaration inside a derived type. */
7616 gfc_match_final_decl (void)
7618 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7621 gfc_namespace
* module_ns
;
7625 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
7627 gfc_error ("FINAL declaration at %C must be inside a derived type "
7628 "CONTAINS section");
7632 block
= gfc_state_stack
->previous
->sym
;
7635 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
7636 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
7638 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7639 " specification part of a MODULE");
7643 module_ns
= gfc_current_ns
;
7644 gcc_assert (module_ns
);
7645 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
7647 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7648 if (gfc_match (" ::") == MATCH_ERROR
)
7651 /* Match the sequence of procedure names. */
7658 if (first
&& gfc_match_eos () == MATCH_YES
)
7660 gfc_error ("Empty FINAL at %C");
7664 m
= gfc_match_name (name
);
7667 gfc_error ("Expected module procedure name at %C");
7670 else if (m
!= MATCH_YES
)
7673 if (gfc_match_eos () == MATCH_YES
)
7675 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7677 gfc_error ("Expected ',' at %C");
7681 if (gfc_get_symbol (name
, module_ns
, &sym
))
7683 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
7687 /* Mark the symbol as module procedure. */
7688 if (sym
->attr
.proc
!= PROC_MODULE
7689 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
7690 sym
->name
, NULL
) == FAILURE
)
7693 /* Check if we already have this symbol in the list, this is an error. */
7694 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
7695 if (f
->proc_sym
== sym
)
7697 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7702 /* Add this symbol to the list of finalizers. */
7703 gcc_assert (block
->f2k_derived
);
7705 f
= XCNEW (gfc_finalizer
);
7707 f
->proc_tree
= NULL
;
7708 f
->where
= gfc_current_locus
;
7709 f
->next
= block
->f2k_derived
->finalizers
;
7710 block
->f2k_derived
->finalizers
= f
;
7720 const ext_attr_t ext_attr_list
[] = {
7721 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
7722 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
7723 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
7724 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
7725 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
7726 { NULL
, EXT_ATTR_LAST
, NULL
}
7729 /* Match a !GCC$ ATTRIBUTES statement of the form:
7730 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7731 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7733 TODO: We should support all GCC attributes using the same syntax for
7734 the attribute list, i.e. the list in C
7735 __attributes(( attribute-list ))
7737 !GCC$ ATTRIBUTES attribute-list ::
7738 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7741 As there is absolutely no risk of confusion, we should never return
7744 gfc_match_gcc_attributes (void)
7746 symbol_attribute attr
;
7747 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7752 gfc_clear_attr (&attr
);
7757 if (gfc_match_name (name
) != MATCH_YES
)
7760 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
7761 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
7764 if (id
== EXT_ATTR_LAST
)
7766 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7770 if (gfc_add_ext_attribute (&attr
, (ext_attr_id_t
) id
, &gfc_current_locus
)
7774 gfc_gobble_whitespace ();
7775 ch
= gfc_next_ascii_char ();
7778 /* This is the successful exit condition for the loop. */
7779 if (gfc_next_ascii_char () == ':')
7789 if (gfc_match_eos () == MATCH_YES
)
7794 m
= gfc_match_name (name
);
7798 if (find_special (name
, &sym
, true))
7801 sym
->attr
.ext_attr
|= attr
.ext_attr
;
7803 if (gfc_match_eos () == MATCH_YES
)
7806 if (gfc_match_char (',') != MATCH_YES
)
7813 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");