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
.cl
626 && e
->symtree
->n
.sym
->ts
.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 *expr
= gfc_int_expr (length
);
662 if (gfc_match_char ('(') == MATCH_NO
)
665 m
= char_len_param_value (expr
);
666 if (m
!= MATCH_YES
&& gfc_matching_function
)
672 if (m
== MATCH_ERROR
)
677 if (gfc_match_char (')') == MATCH_NO
)
679 gfc_free_expr (*expr
);
687 gfc_error ("Syntax error in character length specification at %C");
692 /* Special subroutine for finding a symbol. Check if the name is found
693 in the current name space. If not, and we're compiling a function or
694 subroutine and the parent compilation unit is an interface, then check
695 to see if the name we've been given is the name of the interface
696 (located in another namespace). */
699 find_special (const char *name
, gfc_symbol
**result
, bool allow_subroutine
)
705 i
= gfc_get_sym_tree (name
, NULL
, &st
, allow_subroutine
);
708 *result
= st
? st
->n
.sym
: NULL
;
712 if (gfc_current_state () != COMP_SUBROUTINE
713 && gfc_current_state () != COMP_FUNCTION
)
716 s
= gfc_state_stack
->previous
;
720 if (s
->state
!= COMP_INTERFACE
)
723 goto end
; /* Nameless interface. */
725 if (strcmp (name
, s
->sym
->name
) == 0)
736 /* Special subroutine for getting a symbol node associated with a
737 procedure name, used in SUBROUTINE and FUNCTION statements. The
738 symbol is created in the parent using with symtree node in the
739 child unit pointing to the symbol. If the current namespace has no
740 parent, then the symbol is just created in the current unit. */
743 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
749 /* Module functions have to be left in their own namespace because
750 they have potentially (almost certainly!) already been referenced.
751 In this sense, they are rather like external functions. This is
752 fixed up in resolve.c(resolve_entries), where the symbol name-
753 space is set to point to the master function, so that the fake
754 result mechanism can work. */
755 if (module_fcn_entry
)
757 /* Present if entry is declared to be a module procedure. */
758 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
761 rc
= gfc_get_symbol (name
, NULL
, result
);
762 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
763 && (*result
)->ts
.type
== BT_UNKNOWN
764 && sym
->attr
.flavor
== FL_UNKNOWN
)
765 /* Pick up the typespec for the entry, if declared in the function
766 body. Note that this symbol is FL_UNKNOWN because it will
767 only have appeared in a type declaration. The local symtree
768 is set to point to the module symbol and a unique symtree
769 to the local version. This latter ensures a correct clearing
772 /* If the ENTRY proceeds its specification, we need to ensure
773 that this does not raise a "has no IMPLICIT type" error. */
774 if (sym
->ts
.type
== BT_UNKNOWN
)
775 sym
->attr
.untyped
= 1;
777 (*result
)->ts
= sym
->ts
;
779 /* Put the symbol in the procedure namespace so that, should
780 the ENTRY precede its specification, the specification
782 (*result
)->ns
= gfc_current_ns
;
784 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
786 st
= gfc_get_unique_symtree (gfc_current_ns
);
791 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
797 gfc_current_ns
->refs
++;
799 if (sym
&& !sym
->gfc_new
&& gfc_current_state () != COMP_INTERFACE
)
801 /* Trap another encompassed procedure with the same name. All
802 these conditions are necessary to avoid picking up an entry
803 whose name clashes with that of the encompassing procedure;
804 this is handled using gsymbols to register unique,globally
806 if (sym
->attr
.flavor
!= 0
807 && sym
->attr
.proc
!= 0
808 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
809 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
810 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
811 name
, &sym
->declared_at
);
813 /* Trap a procedure with a name the same as interface in the
814 encompassing scope. */
815 if (sym
->attr
.generic
!= 0
816 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
817 && !sym
->attr
.mod_proc
)
818 gfc_error_now ("Name '%s' at %C is already defined"
819 " as a generic interface at %L",
820 name
, &sym
->declared_at
);
822 /* Trap declarations of attributes in encompassing scope. The
823 signature for this is that ts.kind is set. Legitimate
824 references only set ts.type. */
825 if (sym
->ts
.kind
!= 0
826 && !sym
->attr
.implicit_type
827 && sym
->attr
.proc
== 0
828 && gfc_current_ns
->parent
!= NULL
829 && sym
->attr
.access
== 0
830 && !module_fcn_entry
)
831 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
832 "and must not have attributes declared at %L",
833 name
, &sym
->declared_at
);
836 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
839 /* Module function entries will already have a symtree in
840 the current namespace but will need one at module level. */
841 if (module_fcn_entry
)
843 /* Present if entry is declared to be a module procedure. */
844 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
846 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
849 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
854 /* See if the procedure should be a module procedure. */
856 if (((sym
->ns
->proc_name
!= NULL
857 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
858 && sym
->attr
.proc
!= PROC_MODULE
)
859 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
860 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
861 sym
->name
, NULL
) == FAILURE
)
868 /* Verify that the given symbol representing a parameter is C
869 interoperable, by checking to see if it was marked as such after
870 its declaration. If the given symbol is not interoperable, a
871 warning is reported, thus removing the need to return the status to
872 the calling function. The standard does not require the user use
873 one of the iso_c_binding named constants to declare an
874 interoperable parameter, but we can't be sure if the param is C
875 interop or not if the user doesn't. For example, integer(4) may be
876 legal Fortran, but doesn't have meaning in C. It may interop with
877 a number of the C types, which causes a problem because the
878 compiler can't know which one. This code is almost certainly not
879 portable, and the user will get what they deserve if the C type
880 across platforms isn't always interoperable with integer(4). If
881 the user had used something like integer(c_int) or integer(c_long),
882 the compiler could have automatically handled the varying sizes
886 verify_c_interop_param (gfc_symbol
*sym
)
888 int is_c_interop
= 0;
889 gfc_try retval
= SUCCESS
;
891 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
892 Don't repeat the checks here. */
893 if (sym
->attr
.implicit_type
)
896 /* For subroutines or functions that are passed to a BIND(C) procedure,
897 they're interoperable if they're BIND(C) and their params are all
899 if (sym
->attr
.flavor
== FL_PROCEDURE
)
901 if (sym
->attr
.is_bind_c
== 0)
903 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
904 "attribute to be C interoperable", sym
->name
,
905 &(sym
->declared_at
));
911 if (sym
->attr
.is_c_interop
== 1)
912 /* We've already checked this procedure; don't check it again. */
915 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
920 /* See if we've stored a reference to a procedure that owns sym. */
921 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
923 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
926 (verify_c_interop (&(sym
->ts
))
929 if (is_c_interop
!= 1)
931 /* Make personalized messages to give better feedback. */
932 if (sym
->ts
.type
== BT_DERIVED
)
933 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
934 " procedure '%s' but is not C interoperable "
935 "because derived type '%s' is not C interoperable",
936 sym
->name
, &(sym
->declared_at
),
937 sym
->ns
->proc_name
->name
,
938 sym
->ts
.derived
->name
);
940 gfc_warning ("Variable '%s' at %L is a parameter to the "
941 "BIND(C) procedure '%s' but may not be C "
943 sym
->name
, &(sym
->declared_at
),
944 sym
->ns
->proc_name
->name
);
947 /* Character strings are only C interoperable if they have a
949 if (sym
->ts
.type
== BT_CHARACTER
)
951 gfc_charlen
*cl
= sym
->ts
.cl
;
952 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
953 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
955 gfc_error ("Character argument '%s' at %L "
956 "must be length 1 because "
957 "procedure '%s' is BIND(C)",
958 sym
->name
, &sym
->declared_at
,
959 sym
->ns
->proc_name
->name
);
964 /* We have to make sure that any param to a bind(c) routine does
965 not have the allocatable, pointer, or optional attributes,
966 according to J3/04-007, section 5.1. */
967 if (sym
->attr
.allocatable
== 1)
969 gfc_error ("Variable '%s' at %L cannot have the "
970 "ALLOCATABLE attribute because procedure '%s'"
971 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
972 sym
->ns
->proc_name
->name
);
976 if (sym
->attr
.pointer
== 1)
978 gfc_error ("Variable '%s' at %L cannot have the "
979 "POINTER attribute because procedure '%s'"
980 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
981 sym
->ns
->proc_name
->name
);
985 if (sym
->attr
.optional
== 1)
987 gfc_error ("Variable '%s' at %L cannot have the "
988 "OPTIONAL attribute because procedure '%s'"
989 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
990 sym
->ns
->proc_name
->name
);
994 /* Make sure that if it has the dimension attribute, that it is
995 either assumed size or explicit shape. */
998 if (sym
->as
->type
== AS_ASSUMED_SHAPE
)
1000 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1001 "argument to the procedure '%s' at %L because "
1002 "the procedure is BIND(C)", sym
->name
,
1003 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1004 &(sym
->ns
->proc_name
->declared_at
));
1008 if (sym
->as
->type
== AS_DEFERRED
)
1010 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1011 "argument to the procedure '%s' at %L because "
1012 "the procedure is BIND(C)", sym
->name
,
1013 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1014 &(sym
->ns
->proc_name
->declared_at
));
1025 /* Function called by variable_decl() that adds a name to the symbol table. */
1028 build_sym (const char *name
, gfc_charlen
*cl
,
1029 gfc_array_spec
**as
, locus
*var_locus
)
1031 symbol_attribute attr
;
1034 if (gfc_get_symbol (name
, NULL
, &sym
))
1037 /* Start updating the symbol table. Add basic type attribute if present. */
1038 if (current_ts
.type
!= BT_UNKNOWN
1039 && (sym
->attr
.implicit_type
== 0
1040 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1041 && gfc_add_type (sym
, ¤t_ts
, var_locus
) == FAILURE
)
1044 if (sym
->ts
.type
== BT_CHARACTER
)
1047 /* Add dimension attribute if present. */
1048 if (gfc_set_array_spec (sym
, *as
, var_locus
) == FAILURE
)
1052 /* Add attribute to symbol. The copy is so that we can reset the
1053 dimension attribute. */
1054 attr
= current_attr
;
1057 if (gfc_copy_attr (&sym
->attr
, &attr
, var_locus
) == FAILURE
)
1060 /* Finish any work that may need to be done for the binding label,
1061 if it's a bind(c). The bind(c) attr is found before the symbol
1062 is made, and before the symbol name (for data decls), so the
1063 current_ts is holding the binding label, or nothing if the
1064 name= attr wasn't given. Therefore, test here if we're dealing
1065 with a bind(c) and make sure the binding label is set correctly. */
1066 if (sym
->attr
.is_bind_c
== 1)
1068 if (sym
->binding_label
[0] == '\0')
1070 /* Set the binding label and verify that if a NAME= was specified
1071 then only one identifier was in the entity-decl-list. */
1072 if (set_binding_label (sym
->binding_label
, sym
->name
,
1073 num_idents_on_line
) == FAILURE
)
1078 /* See if we know we're in a common block, and if it's a bind(c)
1079 common then we need to make sure we're an interoperable type. */
1080 if (sym
->attr
.in_common
== 1)
1082 /* Test the common block object. */
1083 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1084 && sym
->ts
.is_c_interop
!= 1)
1086 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1087 "must be declared with a C interoperable "
1088 "kind since common block '%s' is BIND(C)",
1089 sym
->name
, sym
->common_block
->name
,
1090 sym
->common_block
->name
);
1095 sym
->attr
.implied_index
= 0;
1101 /* Set character constant to the given length. The constant will be padded or
1102 truncated. If we're inside an array constructor without a typespec, we
1103 additionally check that all elements have the same length; check_len -1
1104 means no checking. */
1107 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1112 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1113 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1115 slen
= expr
->value
.character
.length
;
1118 s
= gfc_get_wide_string (len
+ 1);
1119 memcpy (s
, expr
->value
.character
.string
,
1120 MIN (len
, slen
) * sizeof (gfc_char_t
));
1122 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1124 if (gfc_option
.warn_character_truncation
&& slen
> len
)
1125 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1126 "(%d/%d)", &expr
->where
, slen
, len
);
1128 /* Apply the standard by 'hand' otherwise it gets cleared for
1130 if (check_len
!= -1 && slen
!= check_len
1131 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1132 gfc_error_now ("The CHARACTER elements of the array constructor "
1133 "at %L must have the same length (%d/%d)",
1134 &expr
->where
, slen
, check_len
);
1137 gfc_free (expr
->value
.character
.string
);
1138 expr
->value
.character
.string
= s
;
1139 expr
->value
.character
.length
= len
;
1144 /* Function to create and update the enumerator history
1145 using the information passed as arguments.
1146 Pointer "max_enum" is also updated, to point to
1147 enum history node containing largest initializer.
1149 SYM points to the symbol node of enumerator.
1150 INIT points to its enumerator value. */
1153 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1155 enumerator_history
*new_enum_history
;
1156 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1158 new_enum_history
= XCNEW (enumerator_history
);
1160 new_enum_history
->sym
= sym
;
1161 new_enum_history
->initializer
= init
;
1162 new_enum_history
->next
= NULL
;
1164 if (enum_history
== NULL
)
1166 enum_history
= new_enum_history
;
1167 max_enum
= enum_history
;
1171 new_enum_history
->next
= enum_history
;
1172 enum_history
= new_enum_history
;
1174 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1175 new_enum_history
->initializer
->value
.integer
) < 0)
1176 max_enum
= new_enum_history
;
1181 /* Function to free enum kind history. */
1184 gfc_free_enum_history (void)
1186 enumerator_history
*current
= enum_history
;
1187 enumerator_history
*next
;
1189 while (current
!= NULL
)
1191 next
= current
->next
;
1196 enum_history
= NULL
;
1200 /* Function called by variable_decl() that adds an initialization
1201 expression to a symbol. */
1204 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1206 symbol_attribute attr
;
1211 if (find_special (name
, &sym
, false))
1216 /* If this symbol is confirming an implicit parameter type,
1217 then an initialization expression is not allowed. */
1218 if (attr
.flavor
== FL_PARAMETER
1219 && sym
->value
!= NULL
1222 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1229 /* An initializer is required for PARAMETER declarations. */
1230 if (attr
.flavor
== FL_PARAMETER
)
1232 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1238 /* If a variable appears in a DATA block, it cannot have an
1242 gfc_error ("Variable '%s' at %C with an initializer already "
1243 "appears in a DATA statement", sym
->name
);
1247 /* Check if the assignment can happen. This has to be put off
1248 until later for a derived type variable. */
1249 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1250 && gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1253 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.cl
)
1255 /* Update symbol character length according initializer. */
1256 if (sym
->ts
.cl
->length
== NULL
)
1259 /* If there are multiple CHARACTER variables declared on the
1260 same line, we don't want them to share the same length. */
1261 sym
->ts
.cl
= gfc_get_charlen ();
1262 sym
->ts
.cl
->next
= gfc_current_ns
->cl_list
;
1263 gfc_current_ns
->cl_list
= sym
->ts
.cl
;
1265 if (sym
->attr
.flavor
== FL_PARAMETER
)
1267 if (init
->expr_type
== EXPR_CONSTANT
)
1269 clen
= init
->value
.character
.length
;
1270 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
1272 else if (init
->expr_type
== EXPR_ARRAY
)
1274 gfc_expr
*p
= init
->value
.constructor
->expr
;
1275 clen
= p
->value
.character
.length
;
1276 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
1278 else if (init
->ts
.cl
&& init
->ts
.cl
->length
)
1279 sym
->ts
.cl
->length
=
1280 gfc_copy_expr (sym
->value
->ts
.cl
->length
);
1283 /* Update initializer character length according symbol. */
1284 else if (sym
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1286 int len
= mpz_get_si (sym
->ts
.cl
->length
->value
.integer
);
1287 gfc_constructor
* p
;
1289 if (init
->expr_type
== EXPR_CONSTANT
)
1290 gfc_set_constant_character_len (len
, init
, -1);
1291 else if (init
->expr_type
== EXPR_ARRAY
)
1293 /* Build a new charlen to prevent simplification from
1294 deleting the length before it is resolved. */
1295 init
->ts
.cl
= gfc_get_charlen ();
1296 init
->ts
.cl
->next
= gfc_current_ns
->cl_list
;
1297 gfc_current_ns
->cl_list
= sym
->ts
.cl
;
1298 init
->ts
.cl
->length
= gfc_copy_expr (sym
->ts
.cl
->length
);
1300 for (p
= init
->value
.constructor
; p
; p
= p
->next
)
1301 gfc_set_constant_character_len (len
, p
->expr
, -1);
1306 /* Need to check if the expression we initialized this
1307 to was one of the iso_c_binding named constants. If so,
1308 and we're a parameter (constant), let it be iso_c.
1310 integer(c_int), parameter :: my_int = c_int
1311 integer(my_int) :: my_int_2
1312 If we mark my_int as iso_c (since we can see it's value
1313 is equal to one of the named constants), then my_int_2
1314 will be considered C interoperable. */
1315 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1317 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1318 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1319 /* attr bits needed for module files. */
1320 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1321 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1322 if (init
->ts
.is_iso_c
)
1323 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1326 /* Add initializer. Make sure we keep the ranks sane. */
1327 if (sym
->attr
.dimension
&& init
->rank
== 0)
1333 if (sym
->attr
.flavor
== FL_PARAMETER
1334 && init
->expr_type
== EXPR_CONSTANT
1335 && spec_size (sym
->as
, &size
) == SUCCESS
1336 && mpz_cmp_si (size
, 0) > 0)
1338 array
= gfc_start_constructor (init
->ts
.type
, init
->ts
.kind
,
1341 array
->value
.constructor
= c
= NULL
;
1342 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1344 if (array
->value
.constructor
== NULL
)
1346 array
->value
.constructor
= c
= gfc_get_constructor ();
1351 c
->next
= gfc_get_constructor ();
1353 c
->expr
= gfc_copy_expr (init
);
1357 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1358 for (n
= 0; n
< sym
->as
->rank
; n
++)
1359 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1364 init
->rank
= sym
->as
->rank
;
1368 if (sym
->attr
.save
== SAVE_NONE
)
1369 sym
->attr
.save
= SAVE_IMPLICIT
;
1377 /* Function called by variable_decl() that adds a name to a structure
1381 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1382 gfc_array_spec
**as
)
1386 /* If the current symbol is of the same derived type that we're
1387 constructing, it must have the pointer attribute. */
1388 if (current_ts
.type
== BT_DERIVED
1389 && current_ts
.derived
== gfc_current_block ()
1390 && current_attr
.pointer
== 0)
1392 gfc_error ("Component at %C must have the POINTER attribute");
1396 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1398 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1400 gfc_error ("Array component of structure at %C must have explicit "
1401 "or deferred shape");
1406 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
1411 c
->attr
= current_attr
;
1413 c
->initializer
= *init
;
1418 c
->attr
.dimension
= 1;
1421 /* Should this ever get more complicated, combine with similar section
1422 in add_init_expr_to_sym into a separate function. */
1423 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
&& c
->ts
.cl
1424 && c
->ts
.cl
->length
&& c
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1428 gcc_assert (c
->ts
.cl
&& c
->ts
.cl
->length
);
1429 gcc_assert (c
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1430 gcc_assert (c
->ts
.cl
->length
->ts
.type
== BT_INTEGER
);
1432 len
= mpz_get_si (c
->ts
.cl
->length
->value
.integer
);
1434 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1435 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1436 else if (mpz_cmp (c
->ts
.cl
->length
->value
.integer
,
1437 c
->initializer
->ts
.cl
->length
->value
.integer
))
1440 gfc_constructor
*ctor
= c
->initializer
->value
.constructor
;
1442 has_ts
= (c
->initializer
->ts
.cl
1443 && c
->initializer
->ts
.cl
->length_from_typespec
);
1449 /* Remember the length of the first element for checking
1450 that all elements *in the constructor* have the same
1451 length. This need not be the length of the LHS! */
1452 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1453 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1454 first_len
= ctor
->expr
->value
.character
.length
;
1456 for (; ctor
; ctor
= ctor
->next
)
1458 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1459 gfc_set_constant_character_len (len
, ctor
->expr
,
1460 has_ts
? -1 : first_len
);
1466 /* Check array components. */
1467 if (!c
->attr
.dimension
)
1469 if (c
->attr
.allocatable
)
1471 gfc_error ("Allocatable component at %C must be an array");
1478 if (c
->attr
.pointer
)
1480 if (c
->as
->type
!= AS_DEFERRED
)
1482 gfc_error ("Pointer array component of structure at %C must have a "
1487 else if (c
->attr
.allocatable
)
1489 if (c
->as
->type
!= AS_DEFERRED
)
1491 gfc_error ("Allocatable component of structure at %C must have a "
1498 if (c
->as
->type
!= AS_EXPLICIT
)
1500 gfc_error ("Array component of structure at %C must have an "
1510 /* Match a 'NULL()', and possibly take care of some side effects. */
1513 gfc_match_null (gfc_expr
**result
)
1519 m
= gfc_match (" null ( )");
1523 /* The NULL symbol now has to be/become an intrinsic function. */
1524 if (gfc_get_symbol ("null", NULL
, &sym
))
1526 gfc_error ("NULL() initialization at %C is ambiguous");
1530 gfc_intrinsic_symbol (sym
);
1532 if (sym
->attr
.proc
!= PROC_INTRINSIC
1533 && (gfc_add_procedure (&sym
->attr
, PROC_INTRINSIC
,
1534 sym
->name
, NULL
) == FAILURE
1535 || gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
))
1538 e
= gfc_get_expr ();
1539 e
->where
= gfc_current_locus
;
1540 e
->expr_type
= EXPR_NULL
;
1541 e
->ts
.type
= BT_UNKNOWN
;
1549 /* Match a variable name with an optional initializer. When this
1550 subroutine is called, a variable is expected to be parsed next.
1551 Depending on what is happening at the moment, updates either the
1552 symbol table or the current interface. */
1555 variable_decl (int elem
)
1557 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1558 gfc_expr
*initializer
, *char_len
;
1560 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1571 old_locus
= gfc_current_locus
;
1573 /* When we get here, we've just matched a list of attributes and
1574 maybe a type and a double colon. The next thing we expect to see
1575 is the name of the symbol. */
1576 m
= gfc_match_name (name
);
1580 var_locus
= gfc_current_locus
;
1582 /* Now we could see the optional array spec. or character length. */
1583 m
= gfc_match_array_spec (&as
);
1584 if (gfc_option
.flag_cray_pointer
&& m
== MATCH_YES
)
1585 cp_as
= gfc_copy_array_spec (as
);
1586 else if (m
== MATCH_ERROR
)
1590 as
= gfc_copy_array_spec (current_as
);
1595 if (current_ts
.type
== BT_CHARACTER
)
1597 switch (match_char_length (&char_len
))
1600 cl
= gfc_get_charlen ();
1601 cl
->next
= gfc_current_ns
->cl_list
;
1602 gfc_current_ns
->cl_list
= cl
;
1604 cl
->length
= char_len
;
1607 /* Non-constant lengths need to be copied after the first
1608 element. Also copy assumed lengths. */
1611 && (current_ts
.cl
->length
== NULL
1612 || current_ts
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1614 cl
= gfc_get_charlen ();
1615 cl
->next
= gfc_current_ns
->cl_list
;
1616 gfc_current_ns
->cl_list
= cl
;
1617 cl
->length
= gfc_copy_expr (current_ts
.cl
->length
);
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
.derived
= current_ts
.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
.derived
->ns
!= gfc_current_ns
)
1714 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, current_ts
.derived
->name
);
1715 if (!(current_ts
.derived
->attr
.imported
1717 && st
->n
.sym
== current_ts
.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_get_charlen ();
2239 cl
->next
= gfc_current_ns
->cl_list
;
2240 gfc_current_ns
->cl_list
= cl
;
2242 if (seen_length
== 0)
2243 cl
->length
= gfc_int_expr (1);
2248 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2250 /* We have to know if it was a c interoperable kind so we can
2251 do accurate type checking of bind(c) procs, etc. */
2253 /* Mark this as c interoperable if being declared with one
2254 of the named constants from iso_c_binding. */
2255 ts
->is_c_interop
= is_iso_c
;
2256 else if (len
!= NULL
)
2257 /* Here, we might have parsed something such as: character(c_char)
2258 In this case, the parsing code above grabs the c_char when
2259 looking for the length (line 1690, roughly). it's the last
2260 testcase for parsing the kind params of a character variable.
2261 However, it's not actually the length. this seems like it
2263 To see if the user used a C interop kind, test the expr
2264 of the so called length, and see if it's C interoperable. */
2265 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2271 /* Matches a type specification. If successful, sets the ts structure
2272 to the matched specification. This is necessary for FUNCTION and
2273 IMPLICIT statements.
2275 If implicit_flag is nonzero, then we don't check for the optional
2276 kind specification. Not doing so is needed for matching an IMPLICIT
2277 statement correctly. */
2280 gfc_match_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2282 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2286 bool seen_deferred_kind
;
2288 /* A belt and braces check that the typespec is correctly being treated
2289 as a deferred characteristic association. */
2290 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2291 && (gfc_current_block ()->result
->ts
.kind
== -1)
2292 && (ts
->kind
== -1);
2294 if (seen_deferred_kind
)
2297 /* Clear the current binding label, in case one is given. */
2298 curr_binding_label
[0] = '\0';
2300 if (gfc_match (" byte") == MATCH_YES
)
2302 if (gfc_notify_std(GFC_STD_GNU
, "Extension: BYTE type at %C")
2306 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2308 gfc_error ("BYTE type used at %C "
2309 "is not available on the target machine");
2313 ts
->type
= BT_INTEGER
;
2318 if (gfc_match (" integer") == MATCH_YES
)
2320 ts
->type
= BT_INTEGER
;
2321 ts
->kind
= gfc_default_integer_kind
;
2325 if (gfc_match (" character") == MATCH_YES
)
2327 ts
->type
= BT_CHARACTER
;
2328 if (implicit_flag
== 0)
2329 return match_char_spec (ts
);
2334 if (gfc_match (" real") == MATCH_YES
)
2337 ts
->kind
= gfc_default_real_kind
;
2341 if (gfc_match (" double precision") == MATCH_YES
)
2344 ts
->kind
= gfc_default_double_kind
;
2348 if (gfc_match (" complex") == MATCH_YES
)
2350 ts
->type
= BT_COMPLEX
;
2351 ts
->kind
= gfc_default_complex_kind
;
2355 if (gfc_match (" double complex") == MATCH_YES
)
2357 if (gfc_notify_std (GFC_STD_GNU
, "DOUBLE COMPLEX at %C does not "
2358 "conform to the Fortran 95 standard") == FAILURE
)
2361 ts
->type
= BT_COMPLEX
;
2362 ts
->kind
= gfc_default_double_kind
;
2366 if (gfc_match (" logical") == MATCH_YES
)
2368 ts
->type
= BT_LOGICAL
;
2369 ts
->kind
= gfc_default_logical_kind
;
2373 m
= gfc_match (" type ( %n )", name
);
2377 ts
->type
= BT_DERIVED
;
2379 /* Defer association of the derived type until the end of the
2380 specification block. However, if the derived type can be
2381 found, add it to the typespec. */
2382 if (gfc_matching_function
)
2385 if (gfc_current_state () != COMP_INTERFACE
2386 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2391 /* Search for the name but allow the components to be defined later. If
2392 type = -1, this typespec has been seen in a function declaration but
2393 the type could not be accessed at that point. */
2395 if (ts
->kind
!= -1 && gfc_get_ha_symbol (name
, &sym
))
2397 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2400 else if (ts
->kind
== -1)
2402 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2403 || gfc_current_ns
->has_import_set
;
2404 if (gfc_find_symbol (name
, NULL
, iface
, &sym
))
2406 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2415 if (sym
->attr
.flavor
!= FL_DERIVED
2416 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
2419 gfc_set_sym_referenced (sym
);
2425 /* For all types except double, derived and character, look for an
2426 optional kind specifier. MATCH_NO is actually OK at this point. */
2427 if (implicit_flag
== 1)
2430 if (gfc_current_form
== FORM_FREE
)
2432 c
= gfc_peek_ascii_char();
2433 if (!gfc_is_whitespace(c
) && c
!= '*' && c
!= '('
2434 && c
!= ':' && c
!= ',')
2438 m
= gfc_match_kind_spec (ts
, false);
2439 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2440 m
= gfc_match_old_kind_spec (ts
);
2442 /* Defer association of the KIND expression of function results
2443 until after USE and IMPORT statements. */
2444 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2445 || gfc_matching_function
)
2449 m
= MATCH_YES
; /* No kind specifier found. */
2455 /* Match an IMPLICIT NONE statement. Actually, this statement is
2456 already matched in parse.c, or we would not end up here in the
2457 first place. So the only thing we need to check, is if there is
2458 trailing garbage. If not, the match is successful. */
2461 gfc_match_implicit_none (void)
2463 return (gfc_match_eos () == MATCH_YES
) ? MATCH_YES
: MATCH_NO
;
2467 /* Match the letter range(s) of an IMPLICIT statement. */
2470 match_implicit_range (void)
2476 cur_loc
= gfc_current_locus
;
2478 gfc_gobble_whitespace ();
2479 c
= gfc_next_ascii_char ();
2482 gfc_error ("Missing character range in IMPLICIT at %C");
2489 gfc_gobble_whitespace ();
2490 c1
= gfc_next_ascii_char ();
2494 gfc_gobble_whitespace ();
2495 c
= gfc_next_ascii_char ();
2500 inner
= 0; /* Fall through. */
2507 gfc_gobble_whitespace ();
2508 c2
= gfc_next_ascii_char ();
2512 gfc_gobble_whitespace ();
2513 c
= gfc_next_ascii_char ();
2515 if ((c
!= ',') && (c
!= ')'))
2528 gfc_error ("Letters must be in alphabetic order in "
2529 "IMPLICIT statement at %C");
2533 /* See if we can add the newly matched range to the pending
2534 implicits from this IMPLICIT statement. We do not check for
2535 conflicts with whatever earlier IMPLICIT statements may have
2536 set. This is done when we've successfully finished matching
2538 if (gfc_add_new_implicit_range (c1
, c2
) != SUCCESS
)
2545 gfc_syntax_error (ST_IMPLICIT
);
2547 gfc_current_locus
= cur_loc
;
2552 /* Match an IMPLICIT statement, storing the types for
2553 gfc_set_implicit() if the statement is accepted by the parser.
2554 There is a strange looking, but legal syntactic construction
2555 possible. It looks like:
2557 IMPLICIT INTEGER (a-b) (c-d)
2559 This is legal if "a-b" is a constant expression that happens to
2560 equal one of the legal kinds for integers. The real problem
2561 happens with an implicit specification that looks like:
2563 IMPLICIT INTEGER (a-b)
2565 In this case, a typespec matcher that is "greedy" (as most of the
2566 matchers are) gobbles the character range as a kindspec, leaving
2567 nothing left. We therefore have to go a bit more slowly in the
2568 matching process by inhibiting the kindspec checking during
2569 typespec matching and checking for a kind later. */
2572 gfc_match_implicit (void)
2581 /* We don't allow empty implicit statements. */
2582 if (gfc_match_eos () == MATCH_YES
)
2584 gfc_error ("Empty IMPLICIT statement at %C");
2590 /* First cleanup. */
2591 gfc_clear_new_implicit ();
2593 /* A basic type is mandatory here. */
2594 m
= gfc_match_type_spec (&ts
, 1);
2595 if (m
== MATCH_ERROR
)
2600 cur_loc
= gfc_current_locus
;
2601 m
= match_implicit_range ();
2605 /* We may have <TYPE> (<RANGE>). */
2606 gfc_gobble_whitespace ();
2607 c
= gfc_next_ascii_char ();
2608 if ((c
== '\n') || (c
== ','))
2610 /* Check for CHARACTER with no length parameter. */
2611 if (ts
.type
== BT_CHARACTER
&& !ts
.cl
)
2613 ts
.kind
= gfc_default_character_kind
;
2614 ts
.cl
= gfc_get_charlen ();
2615 ts
.cl
->next
= gfc_current_ns
->cl_list
;
2616 gfc_current_ns
->cl_list
= ts
.cl
;
2617 ts
.cl
->length
= gfc_int_expr (1);
2620 /* Record the Successful match. */
2621 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2626 gfc_current_locus
= cur_loc
;
2629 /* Discard the (incorrectly) matched range. */
2630 gfc_clear_new_implicit ();
2632 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2633 if (ts
.type
== BT_CHARACTER
)
2634 m
= match_char_spec (&ts
);
2637 m
= gfc_match_kind_spec (&ts
, false);
2640 m
= gfc_match_old_kind_spec (&ts
);
2641 if (m
== MATCH_ERROR
)
2647 if (m
== MATCH_ERROR
)
2650 m
= match_implicit_range ();
2651 if (m
== MATCH_ERROR
)
2656 gfc_gobble_whitespace ();
2657 c
= gfc_next_ascii_char ();
2658 if ((c
!= '\n') && (c
!= ','))
2661 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2669 gfc_syntax_error (ST_IMPLICIT
);
2677 gfc_match_import (void)
2679 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2684 if (gfc_current_ns
->proc_name
== NULL
2685 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
2687 gfc_error ("IMPORT statement at %C only permitted in "
2688 "an INTERFACE body");
2692 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IMPORT statement at %C")
2696 if (gfc_match_eos () == MATCH_YES
)
2698 /* All host variables should be imported. */
2699 gfc_current_ns
->has_import_set
= 1;
2703 if (gfc_match (" ::") == MATCH_YES
)
2705 if (gfc_match_eos () == MATCH_YES
)
2707 gfc_error ("Expecting list of named entities at %C");
2714 m
= gfc_match (" %n", name
);
2718 if (gfc_current_ns
->parent
!= NULL
2719 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
2721 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2724 else if (gfc_current_ns
->proc_name
->ns
->parent
!= NULL
2725 && gfc_find_symbol (name
,
2726 gfc_current_ns
->proc_name
->ns
->parent
,
2729 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2735 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2736 "at %C - does not exist.", name
);
2740 if (gfc_find_symtree (gfc_current_ns
->sym_root
,name
))
2742 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2747 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, sym
->name
);
2750 sym
->attr
.imported
= 1;
2762 if (gfc_match_eos () == MATCH_YES
)
2764 if (gfc_match_char (',') != MATCH_YES
)
2771 gfc_error ("Syntax error in IMPORT statement at %C");
2776 /* A minimal implementation of gfc_match without whitespace, escape
2777 characters or variable arguments. Returns true if the next
2778 characters match the TARGET template exactly. */
2781 match_string_p (const char *target
)
2785 for (p
= target
; *p
; p
++)
2786 if ((char) gfc_next_ascii_char () != *p
)
2791 /* Matches an attribute specification including array specs. If
2792 successful, leaves the variables current_attr and current_as
2793 holding the specification. Also sets the colon_seen variable for
2794 later use by matchers associated with initializations.
2796 This subroutine is a little tricky in the sense that we don't know
2797 if we really have an attr-spec until we hit the double colon.
2798 Until that time, we can only return MATCH_NO. This forces us to
2799 check for duplicate specification at this level. */
2802 match_attr_spec (void)
2804 /* Modifiers that can exist in a type statement. */
2806 { GFC_DECL_BEGIN
= 0,
2807 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
2808 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
2809 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
2810 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
2811 DECL_IS_BIND_C
, DECL_NONE
,
2812 GFC_DECL_END
/* Sentinel */
2816 /* GFC_DECL_END is the sentinel, index starts at 0. */
2817 #define NUM_DECL GFC_DECL_END
2819 locus start
, seen_at
[NUM_DECL
];
2826 gfc_clear_attr (¤t_attr
);
2827 start
= gfc_current_locus
;
2832 /* See if we get all of the keywords up to the final double colon. */
2833 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
2841 gfc_gobble_whitespace ();
2843 ch
= gfc_next_ascii_char ();
2846 /* This is the successful exit condition for the loop. */
2847 if (gfc_next_ascii_char () == ':')
2852 gfc_gobble_whitespace ();
2853 switch (gfc_peek_ascii_char ())
2856 if (match_string_p ("allocatable"))
2857 d
= DECL_ALLOCATABLE
;
2861 /* Try and match the bind(c). */
2862 m
= gfc_match_bind_c (NULL
, true);
2865 else if (m
== MATCH_ERROR
)
2870 if (match_string_p ("dimension"))
2875 if (match_string_p ("external"))
2880 if (match_string_p ("int"))
2882 ch
= gfc_next_ascii_char ();
2885 if (match_string_p ("nt"))
2887 /* Matched "intent". */
2888 /* TODO: Call match_intent_spec from here. */
2889 if (gfc_match (" ( in out )") == MATCH_YES
)
2891 else if (gfc_match (" ( in )") == MATCH_YES
)
2893 else if (gfc_match (" ( out )") == MATCH_YES
)
2899 if (match_string_p ("insic"))
2901 /* Matched "intrinsic". */
2909 if (match_string_p ("optional"))
2914 gfc_next_ascii_char ();
2915 switch (gfc_next_ascii_char ())
2918 if (match_string_p ("rameter"))
2920 /* Matched "parameter". */
2926 if (match_string_p ("inter"))
2928 /* Matched "pointer". */
2934 ch
= gfc_next_ascii_char ();
2937 if (match_string_p ("vate"))
2939 /* Matched "private". */
2945 if (match_string_p ("tected"))
2947 /* Matched "protected". */
2954 if (match_string_p ("blic"))
2956 /* Matched "public". */
2964 if (match_string_p ("save"))
2969 if (match_string_p ("target"))
2974 gfc_next_ascii_char ();
2975 ch
= gfc_next_ascii_char ();
2978 if (match_string_p ("lue"))
2980 /* Matched "value". */
2986 if (match_string_p ("latile"))
2988 /* Matched "volatile". */
2996 /* No double colon and no recognizable decl_type, so assume that
2997 we've been looking at something else the whole time. */
3004 /* Check to make sure any parens are paired up correctly. */
3005 if (gfc_match_parens () == MATCH_ERROR
)
3012 seen_at
[d
] = gfc_current_locus
;
3014 if (d
== DECL_DIMENSION
)
3016 m
= gfc_match_array_spec (¤t_as
);
3020 gfc_error ("Missing dimension specification at %C");
3024 if (m
== MATCH_ERROR
)
3029 /* Since we've seen a double colon, we have to be looking at an
3030 attr-spec. This means that we can now issue errors. */
3031 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3036 case DECL_ALLOCATABLE
:
3037 attr
= "ALLOCATABLE";
3039 case DECL_DIMENSION
:
3046 attr
= "INTENT (IN)";
3049 attr
= "INTENT (OUT)";
3052 attr
= "INTENT (IN OUT)";
3054 case DECL_INTRINSIC
:
3060 case DECL_PARAMETER
:
3066 case DECL_PROTECTED
:
3081 case DECL_IS_BIND_C
:
3091 attr
= NULL
; /* This shouldn't happen. */
3094 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3099 /* Now that we've dealt with duplicate attributes, add the attributes
3100 to the current attribute. */
3101 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3106 if (gfc_current_state () == COMP_DERIVED
3107 && d
!= DECL_DIMENSION
&& d
!= DECL_POINTER
3108 && d
!= DECL_PRIVATE
&& d
!= DECL_PUBLIC
3111 if (d
== DECL_ALLOCATABLE
)
3113 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ALLOCATABLE "
3114 "attribute at %C in a TYPE definition")
3123 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3130 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3131 && gfc_current_state () != COMP_MODULE
)
3133 if (d
== DECL_PRIVATE
)
3137 if (gfc_current_state () == COMP_DERIVED
3138 && gfc_state_stack
->previous
3139 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3141 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Attribute %s "
3142 "at %L in a TYPE definition", attr
,
3152 gfc_error ("%s attribute at %L is not allowed outside of the "
3153 "specification part of a module", attr
, &seen_at
[d
]);
3161 case DECL_ALLOCATABLE
:
3162 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3165 case DECL_DIMENSION
:
3166 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3170 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3174 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3178 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3182 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3185 case DECL_INTRINSIC
:
3186 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3190 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3193 case DECL_PARAMETER
:
3194 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3198 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3201 case DECL_PROTECTED
:
3202 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3204 gfc_error ("PROTECTED at %C only allowed in specification "
3205 "part of a module");
3210 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED "
3215 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3219 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3224 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3229 t
= gfc_add_save (¤t_attr
, NULL
, &seen_at
[d
]);
3233 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3236 case DECL_IS_BIND_C
:
3237 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3241 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE attribute "
3246 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3250 if (gfc_notify_std (GFC_STD_F2003
,
3251 "Fortran 2003: VOLATILE attribute at %C")
3255 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3259 gfc_internal_error ("match_attr_spec(): Bad attribute");
3273 gfc_current_locus
= start
;
3274 gfc_free_array_spec (current_as
);
3280 /* Set the binding label, dest_label, either with the binding label
3281 stored in the given gfc_typespec, ts, or if none was provided, it
3282 will be the symbol name in all lower case, as required by the draft
3283 (J3/04-007, section 15.4.1). If a binding label was given and
3284 there is more than one argument (num_idents), it is an error. */
3287 set_binding_label (char *dest_label
, const char *sym_name
, int num_idents
)
3289 if (num_idents
> 1 && has_name_equals
)
3291 gfc_error ("Multiple identifiers provided with "
3292 "single NAME= specifier at %C");
3296 if (curr_binding_label
[0] != '\0')
3298 /* Binding label given; store in temp holder til have sym. */
3299 strcpy (dest_label
, curr_binding_label
);
3303 /* No binding label given, and the NAME= specifier did not exist,
3304 which means there was no NAME="". */
3305 if (sym_name
!= NULL
&& has_name_equals
== 0)
3306 strcpy (dest_label
, sym_name
);
3313 /* Set the status of the given common block as being BIND(C) or not,
3314 depending on the given parameter, is_bind_c. */
3317 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3319 com_block
->is_bind_c
= is_bind_c
;
3324 /* Verify that the given gfc_typespec is for a C interoperable type. */
3327 verify_c_interop (gfc_typespec
*ts
)
3329 if (ts
->type
== BT_DERIVED
&& ts
->derived
!= NULL
)
3330 return (ts
->derived
->ts
.is_c_interop
? SUCCESS
: FAILURE
);
3331 else if (ts
->is_c_interop
!= 1)
3338 /* Verify that the variables of a given common block, which has been
3339 defined with the attribute specifier bind(c), to be of a C
3340 interoperable type. Errors will be reported here, if
3344 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3346 gfc_symbol
*curr_sym
= NULL
;
3347 gfc_try retval
= SUCCESS
;
3349 curr_sym
= com_block
->head
;
3351 /* Make sure we have at least one symbol. */
3352 if (curr_sym
== NULL
)
3355 /* Here we know we have a symbol, so we'll execute this loop
3359 /* The second to last param, 1, says this is in a common block. */
3360 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
3361 curr_sym
= curr_sym
->common_next
;
3362 } while (curr_sym
!= NULL
);
3368 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3369 an appropriate error message is reported. */
3372 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
3373 int is_in_common
, gfc_common_head
*com_block
)
3375 bool bind_c_function
= false;
3376 gfc_try retval
= SUCCESS
;
3378 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
3379 bind_c_function
= true;
3381 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
3383 tmp_sym
= tmp_sym
->result
;
3384 /* Make sure it wasn't an implicitly typed result. */
3385 if (tmp_sym
->attr
.implicit_type
)
3387 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3388 "%L may not be C interoperable", tmp_sym
->name
,
3389 &tmp_sym
->declared_at
);
3390 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
3391 /* Mark it as C interoperable to prevent duplicate warnings. */
3392 tmp_sym
->ts
.is_c_interop
= 1;
3393 tmp_sym
->attr
.is_c_interop
= 1;
3397 /* Here, we know we have the bind(c) attribute, so if we have
3398 enough type info, then verify that it's a C interop kind.
3399 The info could be in the symbol already, or possibly still in
3400 the given ts (current_ts), so look in both. */
3401 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
3403 if (verify_c_interop (&(tmp_sym
->ts
)) != SUCCESS
)
3405 /* See if we're dealing with a sym in a common block or not. */
3406 if (is_in_common
== 1)
3408 gfc_warning ("Variable '%s' in common block '%s' at %L "
3409 "may not be a C interoperable "
3410 "kind though common block '%s' is BIND(C)",
3411 tmp_sym
->name
, com_block
->name
,
3412 &(tmp_sym
->declared_at
), com_block
->name
);
3416 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
3417 gfc_error ("Type declaration '%s' at %L is not C "
3418 "interoperable but it is BIND(C)",
3419 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3421 gfc_warning ("Variable '%s' at %L "
3422 "may not be a C interoperable "
3423 "kind but it is bind(c)",
3424 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3428 /* Variables declared w/in a common block can't be bind(c)
3429 since there's no way for C to see these variables, so there's
3430 semantically no reason for the attribute. */
3431 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
3433 gfc_error ("Variable '%s' in common block '%s' at "
3434 "%L cannot be declared with BIND(C) "
3435 "since it is not a global",
3436 tmp_sym
->name
, com_block
->name
,
3437 &(tmp_sym
->declared_at
));
3441 /* Scalar variables that are bind(c) can not have the pointer
3442 or allocatable attributes. */
3443 if (tmp_sym
->attr
.is_bind_c
== 1)
3445 if (tmp_sym
->attr
.pointer
== 1)
3447 gfc_error ("Variable '%s' at %L cannot have both the "
3448 "POINTER and BIND(C) attributes",
3449 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3453 if (tmp_sym
->attr
.allocatable
== 1)
3455 gfc_error ("Variable '%s' at %L cannot have both the "
3456 "ALLOCATABLE and BIND(C) attributes",
3457 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3463 /* If it is a BIND(C) function, make sure the return value is a
3464 scalar value. The previous tests in this function made sure
3465 the type is interoperable. */
3466 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
3467 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3468 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
3470 /* BIND(C) functions can not return a character string. */
3471 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
3472 if (tmp_sym
->ts
.cl
== NULL
|| tmp_sym
->ts
.cl
->length
== NULL
3473 || tmp_sym
->ts
.cl
->length
->expr_type
!= EXPR_CONSTANT
3474 || mpz_cmp_si (tmp_sym
->ts
.cl
->length
->value
.integer
, 1) != 0)
3475 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3476 "be a character string", tmp_sym
->name
,
3477 &(tmp_sym
->declared_at
));
3480 /* See if the symbol has been marked as private. If it has, make sure
3481 there is no binding label and warn the user if there is one. */
3482 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
3483 && tmp_sym
->binding_label
[0] != '\0')
3484 /* Use gfc_warning_now because we won't say that the symbol fails
3485 just because of this. */
3486 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3487 "given the binding label '%s'", tmp_sym
->name
,
3488 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
3494 /* Set the appropriate fields for a symbol that's been declared as
3495 BIND(C) (the is_bind_c flag and the binding label), and verify that
3496 the type is C interoperable. Errors are reported by the functions
3497 used to set/test these fields. */
3500 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
3502 gfc_try retval
= SUCCESS
;
3504 /* TODO: Do we need to make sure the vars aren't marked private? */
3506 /* Set the is_bind_c bit in symbol_attribute. */
3507 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
3509 if (set_binding_label (tmp_sym
->binding_label
, tmp_sym
->name
,
3510 num_idents
) != SUCCESS
)
3517 /* Set the fields marking the given common block as BIND(C), including
3518 a binding label, and report any errors encountered. */
3521 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
3523 gfc_try retval
= SUCCESS
;
3525 /* destLabel, common name, typespec (which may have binding label). */
3526 if (set_binding_label (com_block
->binding_label
, com_block
->name
, num_idents
)
3530 /* Set the given common block (com_block) to being bind(c) (1). */
3531 set_com_block_bind_c (com_block
, 1);
3537 /* Retrieve the list of one or more identifiers that the given bind(c)
3538 attribute applies to. */
3541 get_bind_c_idents (void)
3543 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3545 gfc_symbol
*tmp_sym
= NULL
;
3547 gfc_common_head
*com_block
= NULL
;
3549 if (gfc_match_name (name
) == MATCH_YES
)
3551 found_id
= MATCH_YES
;
3552 gfc_get_ha_symbol (name
, &tmp_sym
);
3554 else if (match_common_name (name
) == MATCH_YES
)
3556 found_id
= MATCH_YES
;
3557 com_block
= gfc_get_common (name
, 0);
3561 gfc_error ("Need either entity or common block name for "
3562 "attribute specification statement at %C");
3566 /* Save the current identifier and look for more. */
3569 /* Increment the number of identifiers found for this spec stmt. */
3572 /* Make sure we have a sym or com block, and verify that it can
3573 be bind(c). Set the appropriate field(s) and look for more
3575 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
3577 if (tmp_sym
!= NULL
)
3579 if (set_verify_bind_c_sym (tmp_sym
, num_idents
)
3585 if (set_verify_bind_c_com_block(com_block
, num_idents
)
3590 /* Look to see if we have another identifier. */
3592 if (gfc_match_eos () == MATCH_YES
)
3593 found_id
= MATCH_NO
;
3594 else if (gfc_match_char (',') != MATCH_YES
)
3595 found_id
= MATCH_NO
;
3596 else if (gfc_match_name (name
) == MATCH_YES
)
3598 found_id
= MATCH_YES
;
3599 gfc_get_ha_symbol (name
, &tmp_sym
);
3601 else if (match_common_name (name
) == MATCH_YES
)
3603 found_id
= MATCH_YES
;
3604 com_block
= gfc_get_common (name
, 0);
3608 gfc_error ("Missing entity or common block name for "
3609 "attribute specification statement at %C");
3615 gfc_internal_error ("Missing symbol");
3617 } while (found_id
== MATCH_YES
);
3619 /* if we get here we were successful */
3624 /* Try and match a BIND(C) attribute specification statement. */
3627 gfc_match_bind_c_stmt (void)
3629 match found_match
= MATCH_NO
;
3634 /* This may not be necessary. */
3636 /* Clear the temporary binding label holder. */
3637 curr_binding_label
[0] = '\0';
3639 /* Look for the bind(c). */
3640 found_match
= gfc_match_bind_c (NULL
, true);
3642 if (found_match
== MATCH_YES
)
3644 /* Look for the :: now, but it is not required. */
3647 /* Get the identifier(s) that needs to be updated. This may need to
3648 change to hand the flag(s) for the attr specified so all identifiers
3649 found can have all appropriate parts updated (assuming that the same
3650 spec stmt can have multiple attrs, such as both bind(c) and
3652 if (get_bind_c_idents () != SUCCESS
)
3653 /* Error message should have printed already. */
3661 /* Match a data declaration statement. */
3664 gfc_match_data_decl (void)
3670 num_idents_on_line
= 0;
3672 m
= gfc_match_type_spec (¤t_ts
, 0);
3676 if (current_ts
.type
== BT_DERIVED
&& gfc_current_state () != COMP_DERIVED
)
3678 sym
= gfc_use_derived (current_ts
.derived
);
3686 current_ts
.derived
= sym
;
3689 m
= match_attr_spec ();
3690 if (m
== MATCH_ERROR
)
3696 if (current_ts
.type
== BT_DERIVED
&& current_ts
.derived
->components
== NULL
3697 && !current_ts
.derived
->attr
.zero_comp
)
3700 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
3703 gfc_find_symbol (current_ts
.derived
->name
,
3704 current_ts
.derived
->ns
->parent
, 1, &sym
);
3706 /* Any symbol that we find had better be a type definition
3707 which has its components defined. */
3708 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
3709 && (current_ts
.derived
->components
!= NULL
3710 || current_ts
.derived
->attr
.zero_comp
))
3713 /* Now we have an error, which we signal, and then fix up
3714 because the knock-on is plain and simple confusing. */
3715 gfc_error_now ("Derived type at %C has not been previously defined "
3716 "and so cannot appear in a derived type definition");
3717 current_attr
.pointer
= 1;
3722 /* If we have an old-style character declaration, and no new-style
3723 attribute specifications, then there a comma is optional between
3724 the type specification and the variable list. */
3725 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
3726 gfc_match_char (',');
3728 /* Give the types/attributes to symbols that follow. Give the element
3729 a number so that repeat character length expressions can be copied. */
3733 num_idents_on_line
++;
3734 m
= variable_decl (elem
++);
3735 if (m
== MATCH_ERROR
)
3740 if (gfc_match_eos () == MATCH_YES
)
3742 if (gfc_match_char (',') != MATCH_YES
)
3746 if (gfc_error_flag_test () == 0)
3747 gfc_error ("Syntax error in data declaration at %C");
3750 gfc_free_data_all (gfc_current_ns
);
3753 gfc_free_array_spec (current_as
);
3759 /* Match a prefix associated with a function or subroutine
3760 declaration. If the typespec pointer is nonnull, then a typespec
3761 can be matched. Note that if nothing matches, MATCH_YES is
3762 returned (the null string was matched). */
3765 gfc_match_prefix (gfc_typespec
*ts
)
3769 gfc_clear_attr (¤t_attr
);
3772 gcc_assert (!gfc_matching_prefix
);
3773 gfc_matching_prefix
= true;
3776 if (!seen_type
&& ts
!= NULL
3777 && gfc_match_type_spec (ts
, 0) == MATCH_YES
3778 && gfc_match_space () == MATCH_YES
)
3785 if (gfc_match ("elemental% ") == MATCH_YES
)
3787 if (gfc_add_elemental (¤t_attr
, NULL
) == FAILURE
)
3793 if (gfc_match ("pure% ") == MATCH_YES
)
3795 if (gfc_add_pure (¤t_attr
, NULL
) == FAILURE
)
3801 if (gfc_match ("recursive% ") == MATCH_YES
)
3803 if (gfc_add_recursive (¤t_attr
, NULL
) == FAILURE
)
3809 /* At this point, the next item is not a prefix. */
3810 gcc_assert (gfc_matching_prefix
);
3811 gfc_matching_prefix
= false;
3815 gcc_assert (gfc_matching_prefix
);
3816 gfc_matching_prefix
= false;
3821 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3824 copy_prefix (symbol_attribute
*dest
, locus
*where
)
3826 if (current_attr
.pure
&& gfc_add_pure (dest
, where
) == FAILURE
)
3829 if (current_attr
.elemental
&& gfc_add_elemental (dest
, where
) == FAILURE
)
3832 if (current_attr
.recursive
&& gfc_add_recursive (dest
, where
) == FAILURE
)
3839 /* Match a formal argument list. */
3842 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
3844 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
3845 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3851 if (gfc_match_char ('(') != MATCH_YES
)
3858 if (gfc_match_char (')') == MATCH_YES
)
3863 if (gfc_match_char ('*') == MATCH_YES
)
3867 m
= gfc_match_name (name
);
3871 if (gfc_get_symbol (name
, NULL
, &sym
))
3875 p
= gfc_get_formal_arglist ();
3887 /* We don't add the VARIABLE flavor because the name could be a
3888 dummy procedure. We don't apply these attributes to formal
3889 arguments of statement functions. */
3890 if (sym
!= NULL
&& !st_flag
3891 && (gfc_add_dummy (&sym
->attr
, sym
->name
, NULL
) == FAILURE
3892 || gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
))
3898 /* The name of a program unit can be in a different namespace,
3899 so check for it explicitly. After the statement is accepted,
3900 the name is checked for especially in gfc_get_symbol(). */
3901 if (gfc_new_block
!= NULL
&& sym
!= NULL
3902 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
3904 gfc_error ("Name '%s' at %C is the name of the procedure",
3910 if (gfc_match_char (')') == MATCH_YES
)
3913 m
= gfc_match_char (',');
3916 gfc_error ("Unexpected junk in formal argument list at %C");
3922 /* Check for duplicate symbols in the formal argument list. */
3925 for (p
= head
; p
->next
; p
= p
->next
)
3930 for (q
= p
->next
; q
; q
= q
->next
)
3931 if (p
->sym
== q
->sym
)
3933 gfc_error ("Duplicate symbol '%s' in formal argument list "
3934 "at %C", p
->sym
->name
);
3942 if (gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
)
3952 gfc_free_formal_arglist (head
);
3957 /* Match a RESULT specification following a function declaration or
3958 ENTRY statement. Also matches the end-of-statement. */
3961 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
3963 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3967 if (gfc_match (" result (") != MATCH_YES
)
3970 m
= gfc_match_name (name
);
3974 /* Get the right paren, and that's it because there could be the
3975 bind(c) attribute after the result clause. */
3976 if (gfc_match_char(')') != MATCH_YES
)
3978 /* TODO: should report the missing right paren here. */
3982 if (strcmp (function
->name
, name
) == 0)
3984 gfc_error ("RESULT variable at %C must be different than function name");
3988 if (gfc_get_symbol (name
, NULL
, &r
))
3991 if (gfc_add_result (&r
->attr
, r
->name
, NULL
) == FAILURE
)
4000 /* Match a function suffix, which could be a combination of a result
4001 clause and BIND(C), either one, or neither. The draft does not
4002 require them to come in a specific order. */
4005 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4007 match is_bind_c
; /* Found bind(c). */
4008 match is_result
; /* Found result clause. */
4009 match found_match
; /* Status of whether we've found a good match. */
4010 char peek_char
; /* Character we're going to peek at. */
4011 bool allow_binding_name
;
4013 /* Initialize to having found nothing. */
4014 found_match
= MATCH_NO
;
4015 is_bind_c
= MATCH_NO
;
4016 is_result
= MATCH_NO
;
4018 /* Get the next char to narrow between result and bind(c). */
4019 gfc_gobble_whitespace ();
4020 peek_char
= gfc_peek_ascii_char ();
4022 /* C binding names are not allowed for internal procedures. */
4023 if (gfc_current_state () == COMP_CONTAINS
4024 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4025 allow_binding_name
= false;
4027 allow_binding_name
= true;
4032 /* Look for result clause. */
4033 is_result
= match_result (sym
, result
);
4034 if (is_result
== MATCH_YES
)
4036 /* Now see if there is a bind(c) after it. */
4037 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4038 /* We've found the result clause and possibly bind(c). */
4039 found_match
= MATCH_YES
;
4042 /* This should only be MATCH_ERROR. */
4043 found_match
= is_result
;
4046 /* Look for bind(c) first. */
4047 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4048 if (is_bind_c
== MATCH_YES
)
4050 /* Now see if a result clause followed it. */
4051 is_result
= match_result (sym
, result
);
4052 found_match
= MATCH_YES
;
4056 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4057 found_match
= MATCH_ERROR
;
4061 gfc_error ("Unexpected junk after function declaration at %C");
4062 found_match
= MATCH_ERROR
;
4066 if (is_bind_c
== MATCH_YES
)
4068 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4069 if (gfc_current_state () == COMP_CONTAINS
4070 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4071 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
4072 "at %L may not be specified for an internal "
4073 "procedure", &gfc_current_locus
)
4077 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1)
4086 /* Procedure pointer return value without RESULT statement:
4087 Add "hidden" result variable named "ppr@". */
4090 add_hidden_procptr_result (gfc_symbol
*sym
)
4094 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4097 /* First usage case: PROCEDURE and EXTERNAL statements. */
4098 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4099 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4100 && sym
->attr
.external
;
4101 /* Second usage case: INTERFACE statements. */
4102 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4103 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4104 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4110 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
, false);
4114 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
, false);
4115 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4116 st2
->n
.sym
= stree
->n
.sym
;
4118 sym
->result
= stree
->n
.sym
;
4120 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4121 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4122 sym
->result
->attr
.external
= sym
->attr
.external
;
4123 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4124 sym
->result
->ts
= sym
->ts
;
4125 sym
->attr
.proc_pointer
= 0;
4126 sym
->attr
.pointer
= 0;
4127 sym
->attr
.external
= 0;
4128 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4130 sym
->result
->attr
.pointer
= 0;
4131 sym
->result
->attr
.proc_pointer
= 1;
4134 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4136 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4137 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4138 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4139 && sym
== gfc_current_ns
->proc_name
4140 && sym
== sym
->result
->ns
->proc_name
4141 && strcmp ("ppr@", sym
->result
->name
) == 0)
4143 sym
->result
->attr
.proc_pointer
= 1;
4144 sym
->attr
.pointer
= 0;
4152 /* Match the interface for a PROCEDURE declaration,
4153 including brackets (R1212). */
4156 match_procedure_interface (gfc_symbol
**proc_if
)
4159 locus old_loc
, entry_loc
;
4160 old_loc
= entry_loc
= gfc_current_locus
;
4162 gfc_clear_ts (¤t_ts
);
4164 if (gfc_match (" (") != MATCH_YES
)
4166 gfc_current_locus
= entry_loc
;
4170 /* Get the type spec. for the procedure interface. */
4171 old_loc
= gfc_current_locus
;
4172 m
= gfc_match_type_spec (¤t_ts
, 0);
4173 gfc_gobble_whitespace ();
4174 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4177 if (m
== MATCH_ERROR
)
4180 gfc_current_locus
= old_loc
;
4182 /* Get the name of the procedure or abstract interface
4183 to inherit the interface from. */
4184 m
= gfc_match_symbol (proc_if
, 1);
4188 /* Various interface checks. */
4192 /* Resolve interface if possible. That way, attr.procedure is only set
4193 if it is declared by a later procedure-declaration-stmt, which is
4194 invalid per C1212. */
4195 while ((*proc_if
)->ts
.interface
)
4196 *proc_if
= (*proc_if
)->ts
.interface
;
4198 if ((*proc_if
)->generic
)
4200 gfc_error ("Interface '%s' at %C may not be generic",
4204 if ((*proc_if
)->attr
.proc
== PROC_ST_FUNCTION
)
4206 gfc_error ("Interface '%s' at %C may not be a statement function",
4210 /* Handle intrinsic procedures. */
4211 if (!((*proc_if
)->attr
.external
|| (*proc_if
)->attr
.use_assoc
4212 || (*proc_if
)->attr
.if_source
== IFSRC_IFBODY
)
4213 && (gfc_is_intrinsic ((*proc_if
), 0, gfc_current_locus
)
4214 || gfc_is_intrinsic ((*proc_if
), 1, gfc_current_locus
)))
4215 (*proc_if
)->attr
.intrinsic
= 1;
4216 if ((*proc_if
)->attr
.intrinsic
4217 && !gfc_intrinsic_actual_ok ((*proc_if
)->name
, 0))
4219 gfc_error ("Intrinsic procedure '%s' not allowed "
4220 "in PROCEDURE statement at %C", (*proc_if
)->name
);
4226 if (gfc_match (" )") != MATCH_YES
)
4228 gfc_current_locus
= entry_loc
;
4236 /* Match a PROCEDURE declaration (R1211). */
4239 match_procedure_decl (void)
4242 gfc_symbol
*sym
, *proc_if
= NULL
;
4244 gfc_expr
*initializer
= NULL
;
4246 /* Parse interface (with brackets). */
4247 m
= match_procedure_interface (&proc_if
);
4251 /* Parse attributes (with colons). */
4252 m
= match_attr_spec();
4253 if (m
== MATCH_ERROR
)
4256 /* Get procedure symbols. */
4259 m
= gfc_match_symbol (&sym
, 0);
4262 else if (m
== MATCH_ERROR
)
4265 /* Add current_attr to the symbol attributes. */
4266 if (gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4269 if (sym
->attr
.is_bind_c
)
4271 /* Check for C1218. */
4272 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4274 gfc_error ("BIND(C) attribute at %C requires "
4275 "an interface with BIND(C)");
4278 /* Check for C1217. */
4279 if (has_name_equals
&& sym
->attr
.pointer
)
4281 gfc_error ("BIND(C) procedure with NAME may not have "
4282 "POINTER attribute at %C");
4285 if (has_name_equals
&& sym
->attr
.dummy
)
4287 gfc_error ("Dummy procedure at %C may not have "
4288 "BIND(C) attribute with NAME");
4291 /* Set binding label for BIND(C). */
4292 if (set_binding_label (sym
->binding_label
, sym
->name
, num
) != SUCCESS
)
4296 if (gfc_add_external (&sym
->attr
, NULL
) == FAILURE
)
4299 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4302 if (gfc_add_proc (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4305 /* Set interface. */
4306 if (proc_if
!= NULL
)
4308 if (sym
->ts
.type
!= BT_UNKNOWN
)
4310 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4311 sym
->name
, &gfc_current_locus
,
4312 gfc_basic_typename (sym
->ts
.type
));
4315 sym
->ts
.interface
= proc_if
;
4316 sym
->attr
.untyped
= 1;
4317 sym
->attr
.if_source
= IFSRC_IFBODY
;
4319 else if (current_ts
.type
!= BT_UNKNOWN
)
4321 if (gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4323 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4324 sym
->ts
.interface
->ts
= current_ts
;
4325 sym
->ts
.interface
->attr
.function
= 1;
4326 sym
->attr
.function
= sym
->ts
.interface
->attr
.function
;
4327 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
4330 if (gfc_match (" =>") == MATCH_YES
)
4332 if (!current_attr
.pointer
)
4334 gfc_error ("Initialization at %C isn't for a pointer variable");
4339 m
= gfc_match_null (&initializer
);
4342 gfc_error ("Pointer initialization requires a NULL() at %C");
4346 if (gfc_pure (NULL
))
4348 gfc_error ("Initialization of pointer at %C is not allowed in "
4349 "a PURE procedure");
4356 if (add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
)
4362 gfc_set_sym_referenced (sym
);
4364 if (gfc_match_eos () == MATCH_YES
)
4366 if (gfc_match_char (',') != MATCH_YES
)
4371 gfc_error ("Syntax error in PROCEDURE statement at %C");
4375 /* Free stuff up and return. */
4376 gfc_free_expr (initializer
);
4382 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
4385 /* Match a procedure pointer component declaration (R445). */
4388 match_ppc_decl (void)
4391 gfc_symbol
*proc_if
= NULL
;
4395 gfc_expr
*initializer
= NULL
;
4396 gfc_typebound_proc
* tb
;
4397 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4399 /* Parse interface (with brackets). */
4400 m
= match_procedure_interface (&proc_if
);
4404 /* Parse attributes. */
4405 tb
= XCNEW (gfc_typebound_proc
);
4406 tb
->where
= gfc_current_locus
;
4407 m
= match_binding_attributes (tb
, false, true);
4408 if (m
== MATCH_ERROR
)
4411 /* TODO: Implement PASS. */
4414 gfc_error ("Procedure Pointer Component with PASS at %C "
4415 "not yet implemented");
4419 gfc_clear_attr (¤t_attr
);
4420 current_attr
.procedure
= 1;
4421 current_attr
.proc_pointer
= 1;
4422 current_attr
.access
= tb
->access
;
4423 current_attr
.flavor
= FL_PROCEDURE
;
4425 /* Match the colons (required). */
4426 if (gfc_match (" ::") != MATCH_YES
)
4428 gfc_error ("Expected '::' after binding-attributes at %C");
4432 /* Check for C450. */
4433 if (!tb
->nopass
&& proc_if
== NULL
)
4435 gfc_error("NOPASS or explicit interface required at %C");
4439 /* Match PPC names. */
4443 m
= gfc_match_name (name
);
4446 else if (m
== MATCH_ERROR
)
4449 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
4452 /* Add current_attr to the symbol attributes. */
4453 if (gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4456 if (gfc_add_external (&c
->attr
, NULL
) == FAILURE
)
4459 if (gfc_add_proc (&c
->attr
, name
, NULL
) == FAILURE
)
4462 /* Set interface. */
4463 if (proc_if
!= NULL
)
4465 c
->ts
.interface
= proc_if
;
4466 c
->attr
.untyped
= 1;
4467 c
->attr
.if_source
= IFSRC_IFBODY
;
4469 else if (ts
.type
!= BT_UNKNOWN
)
4472 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4473 c
->ts
.interface
->ts
= ts
;
4474 c
->ts
.interface
->attr
.function
= 1;
4475 c
->attr
.function
= c
->ts
.interface
->attr
.function
;
4476 c
->attr
.if_source
= IFSRC_UNKNOWN
;
4479 if (gfc_match (" =>") == MATCH_YES
)
4481 m
= gfc_match_null (&initializer
);
4484 gfc_error ("Pointer initialization requires a NULL() at %C");
4487 if (gfc_pure (NULL
))
4489 gfc_error ("Initialization of pointer at %C is not allowed in "
4490 "a PURE procedure");
4495 gfc_free_expr (initializer
);
4498 c
->initializer
= initializer
;
4501 if (gfc_match_eos () == MATCH_YES
)
4503 if (gfc_match_char (',') != MATCH_YES
)
4508 gfc_error ("Syntax error in procedure pointer component at %C");
4513 /* Match a PROCEDURE declaration inside an interface (R1206). */
4516 match_procedure_in_interface (void)
4520 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4522 if (current_interface
.type
== INTERFACE_NAMELESS
4523 || current_interface
.type
== INTERFACE_ABSTRACT
)
4525 gfc_error ("PROCEDURE at %C must be in a generic interface");
4531 m
= gfc_match_name (name
);
4534 else if (m
== MATCH_ERROR
)
4536 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
4539 if (gfc_add_interface (sym
) == FAILURE
)
4542 if (gfc_match_eos () == MATCH_YES
)
4544 if (gfc_match_char (',') != MATCH_YES
)
4551 gfc_error ("Syntax error in PROCEDURE statement at %C");
4556 /* General matcher for PROCEDURE declarations. */
4558 static match
match_procedure_in_type (void);
4561 gfc_match_procedure (void)
4565 switch (gfc_current_state ())
4570 case COMP_SUBROUTINE
:
4572 m
= match_procedure_decl ();
4574 case COMP_INTERFACE
:
4575 m
= match_procedure_in_interface ();
4578 m
= match_ppc_decl ();
4580 case COMP_DERIVED_CONTAINS
:
4581 m
= match_procedure_in_type ();
4590 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROCEDURE statement at %C")
4598 /* Warn if a matched procedure has the same name as an intrinsic; this is
4599 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4600 parser-state-stack to find out whether we're in a module. */
4603 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
4607 in_module
= (gfc_state_stack
->previous
4608 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
4610 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
4614 /* Match a function declaration. */
4617 gfc_match_function_decl (void)
4619 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4620 gfc_symbol
*sym
, *result
;
4624 match found_match
; /* Status returned by match func. */
4626 if (gfc_current_state () != COMP_NONE
4627 && gfc_current_state () != COMP_INTERFACE
4628 && gfc_current_state () != COMP_CONTAINS
)
4631 gfc_clear_ts (¤t_ts
);
4633 old_loc
= gfc_current_locus
;
4635 m
= gfc_match_prefix (¤t_ts
);
4638 gfc_current_locus
= old_loc
;
4642 if (gfc_match ("function% %n", name
) != MATCH_YES
)
4644 gfc_current_locus
= old_loc
;
4647 if (get_proc_name (name
, &sym
, false))
4650 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4653 gfc_new_block
= sym
;
4655 m
= gfc_match_formal_arglist (sym
, 0, 0);
4658 gfc_error ("Expected formal argument list in function "
4659 "definition at %C");
4663 else if (m
== MATCH_ERROR
)
4668 /* According to the draft, the bind(c) and result clause can
4669 come in either order after the formal_arg_list (i.e., either
4670 can be first, both can exist together or by themselves or neither
4671 one). Therefore, the match_result can't match the end of the
4672 string, and check for the bind(c) or result clause in either order. */
4673 found_match
= gfc_match_eos ();
4675 /* Make sure that it isn't already declared as BIND(C). If it is, it
4676 must have been marked BIND(C) with a BIND(C) attribute and that is
4677 not allowed for procedures. */
4678 if (sym
->attr
.is_bind_c
== 1)
4680 sym
->attr
.is_bind_c
= 0;
4681 if (sym
->old_symbol
!= NULL
)
4682 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4683 "variables or common blocks",
4684 &(sym
->old_symbol
->declared_at
));
4686 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4687 "variables or common blocks", &gfc_current_locus
);
4690 if (found_match
!= MATCH_YES
)
4692 /* If we haven't found the end-of-statement, look for a suffix. */
4693 suffix_match
= gfc_match_suffix (sym
, &result
);
4694 if (suffix_match
== MATCH_YES
)
4695 /* Need to get the eos now. */
4696 found_match
= gfc_match_eos ();
4698 found_match
= suffix_match
;
4701 if(found_match
!= MATCH_YES
)
4705 /* Make changes to the symbol. */
4708 if (gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4711 if (gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
4712 || copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
4715 /* Delay matching the function characteristics until after the
4716 specification block by signalling kind=-1. */
4717 sym
->declared_at
= old_loc
;
4718 if (current_ts
.type
!= BT_UNKNOWN
)
4719 current_ts
.kind
= -1;
4721 current_ts
.kind
= 0;
4725 if (current_ts
.type
!= BT_UNKNOWN
4726 && gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4732 if (current_ts
.type
!= BT_UNKNOWN
4733 && gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
)
4736 sym
->result
= result
;
4739 /* Warn if this procedure has the same name as an intrinsic. */
4740 warn_intrinsic_shadow (sym
, true);
4746 gfc_current_locus
= old_loc
;
4751 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4752 pass the name of the entry, rather than the gfc_current_block name, and
4753 to return false upon finding an existing global entry. */
4756 add_global_entry (const char *name
, int sub
)
4759 enum gfc_symbol_type type
;
4761 s
= gfc_get_gsymbol(name
);
4762 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
4765 || (s
->type
!= GSYM_UNKNOWN
4766 && s
->type
!= type
))
4767 gfc_global_used(s
, NULL
);
4771 s
->where
= gfc_current_locus
;
4773 s
->ns
= gfc_current_ns
;
4780 /* Match an ENTRY statement. */
4783 gfc_match_entry (void)
4788 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4789 gfc_compile_state state
;
4793 bool module_procedure
;
4797 m
= gfc_match_name (name
);
4801 state
= gfc_current_state ();
4802 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
4807 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4810 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4812 case COMP_BLOCK_DATA
:
4813 gfc_error ("ENTRY statement at %C cannot appear within "
4816 case COMP_INTERFACE
:
4817 gfc_error ("ENTRY statement at %C cannot appear within "
4821 gfc_error ("ENTRY statement at %C cannot appear within "
4822 "a DERIVED TYPE block");
4825 gfc_error ("ENTRY statement at %C cannot appear within "
4826 "an IF-THEN block");
4829 gfc_error ("ENTRY statement at %C cannot appear within "
4833 gfc_error ("ENTRY statement at %C cannot appear within "
4837 gfc_error ("ENTRY statement at %C cannot appear within "
4841 gfc_error ("ENTRY statement at %C cannot appear within "
4845 gfc_error ("ENTRY statement at %C cannot appear within "
4846 "a contained subprogram");
4849 gfc_internal_error ("gfc_match_entry(): Bad state");
4854 module_procedure
= gfc_current_ns
->parent
!= NULL
4855 && gfc_current_ns
->parent
->proc_name
4856 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
4859 if (gfc_current_ns
->parent
!= NULL
4860 && gfc_current_ns
->parent
->proc_name
4861 && !module_procedure
)
4863 gfc_error("ENTRY statement at %C cannot appear in a "
4864 "contained procedure");
4868 /* Module function entries need special care in get_proc_name
4869 because previous references within the function will have
4870 created symbols attached to the current namespace. */
4871 if (get_proc_name (name
, &entry
,
4872 gfc_current_ns
->parent
!= NULL
4873 && module_procedure
))
4876 proc
= gfc_current_block ();
4878 /* Make sure that it isn't already declared as BIND(C). If it is, it
4879 must have been marked BIND(C) with a BIND(C) attribute and that is
4880 not allowed for procedures. */
4881 if (entry
->attr
.is_bind_c
== 1)
4883 entry
->attr
.is_bind_c
= 0;
4884 if (entry
->old_symbol
!= NULL
)
4885 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4886 "variables or common blocks",
4887 &(entry
->old_symbol
->declared_at
));
4889 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4890 "variables or common blocks", &gfc_current_locus
);
4893 /* Check what next non-whitespace character is so we can tell if there
4894 is the required parens if we have a BIND(C). */
4895 gfc_gobble_whitespace ();
4896 peek_char
= gfc_peek_ascii_char ();
4898 if (state
== COMP_SUBROUTINE
)
4900 /* An entry in a subroutine. */
4901 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 1))
4904 m
= gfc_match_formal_arglist (entry
, 0, 1);
4908 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4909 never be an internal procedure. */
4910 is_bind_c
= gfc_match_bind_c (entry
, true);
4911 if (is_bind_c
== MATCH_ERROR
)
4913 if (is_bind_c
== MATCH_YES
)
4915 if (peek_char
!= '(')
4917 gfc_error ("Missing required parentheses before BIND(C) at %C");
4920 if (gfc_add_is_bind_c (&(entry
->attr
), entry
->name
, &(entry
->declared_at
), 1)
4925 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4926 || gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4931 /* An entry in a function.
4932 We need to take special care because writing
4937 ENTRY f() RESULT (r)
4939 ENTRY f RESULT (r). */
4940 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 0))
4943 old_loc
= gfc_current_locus
;
4944 if (gfc_match_eos () == MATCH_YES
)
4946 gfc_current_locus
= old_loc
;
4947 /* Match the empty argument list, and add the interface to
4949 m
= gfc_match_formal_arglist (entry
, 0, 1);
4952 m
= gfc_match_formal_arglist (entry
, 0, 0);
4959 if (gfc_match_eos () == MATCH_YES
)
4961 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4962 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4965 entry
->result
= entry
;
4969 m
= gfc_match_suffix (entry
, &result
);
4971 gfc_syntax_error (ST_ENTRY
);
4977 if (gfc_add_result (&result
->attr
, result
->name
, NULL
) == FAILURE
4978 || gfc_add_entry (&entry
->attr
, result
->name
, NULL
) == FAILURE
4979 || gfc_add_function (&entry
->attr
, result
->name
, NULL
)
4982 entry
->result
= result
;
4986 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4987 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4989 entry
->result
= entry
;
4994 if (gfc_match_eos () != MATCH_YES
)
4996 gfc_syntax_error (ST_ENTRY
);
5000 entry
->attr
.recursive
= proc
->attr
.recursive
;
5001 entry
->attr
.elemental
= proc
->attr
.elemental
;
5002 entry
->attr
.pure
= proc
->attr
.pure
;
5004 el
= gfc_get_entry_list ();
5006 el
->next
= gfc_current_ns
->entries
;
5007 gfc_current_ns
->entries
= el
;
5009 el
->id
= el
->next
->id
+ 1;
5013 new_st
.op
= EXEC_ENTRY
;
5014 new_st
.ext
.entry
= el
;
5020 /* Match a subroutine statement, including optional prefixes. */
5023 gfc_match_subroutine (void)
5025 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5030 bool allow_binding_name
;
5032 if (gfc_current_state () != COMP_NONE
5033 && gfc_current_state () != COMP_INTERFACE
5034 && gfc_current_state () != COMP_CONTAINS
)
5037 m
= gfc_match_prefix (NULL
);
5041 m
= gfc_match ("subroutine% %n", name
);
5045 if (get_proc_name (name
, &sym
, false))
5048 if (add_hidden_procptr_result (sym
) == SUCCESS
)
5051 gfc_new_block
= sym
;
5053 /* Check what next non-whitespace character is so we can tell if there
5054 is the required parens if we have a BIND(C). */
5055 gfc_gobble_whitespace ();
5056 peek_char
= gfc_peek_ascii_char ();
5058 if (gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
5061 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5064 /* Make sure that it isn't already declared as BIND(C). If it is, it
5065 must have been marked BIND(C) with a BIND(C) attribute and that is
5066 not allowed for procedures. */
5067 if (sym
->attr
.is_bind_c
== 1)
5069 sym
->attr
.is_bind_c
= 0;
5070 if (sym
->old_symbol
!= NULL
)
5071 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5072 "variables or common blocks",
5073 &(sym
->old_symbol
->declared_at
));
5075 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5076 "variables or common blocks", &gfc_current_locus
);
5079 /* C binding names are not allowed for internal procedures. */
5080 if (gfc_current_state () == COMP_CONTAINS
5081 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5082 allow_binding_name
= false;
5084 allow_binding_name
= true;
5086 /* Here, we are just checking if it has the bind(c) attribute, and if
5087 so, then we need to make sure it's all correct. If it doesn't,
5088 we still need to continue matching the rest of the subroutine line. */
5089 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5090 if (is_bind_c
== MATCH_ERROR
)
5092 /* There was an attempt at the bind(c), but it was wrong. An
5093 error message should have been printed w/in the gfc_match_bind_c
5094 so here we'll just return the MATCH_ERROR. */
5098 if (is_bind_c
== MATCH_YES
)
5100 /* The following is allowed in the Fortran 2008 draft. */
5101 if (gfc_current_state () == COMP_CONTAINS
5102 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5103 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
5104 "at %L may not be specified for an internal "
5105 "procedure", &gfc_current_locus
)
5109 if (peek_char
!= '(')
5111 gfc_error ("Missing required parentheses before BIND(C) at %C");
5114 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &(sym
->declared_at
), 1)
5119 if (gfc_match_eos () != MATCH_YES
)
5121 gfc_syntax_error (ST_SUBROUTINE
);
5125 if (copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
5128 /* Warn if it has the same name as an intrinsic. */
5129 warn_intrinsic_shadow (sym
, false);
5135 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5136 given, and set the binding label in either the given symbol (if not
5137 NULL), or in the current_ts. The symbol may be NULL because we may
5138 encounter the BIND(C) before the declaration itself. Return
5139 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5140 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5141 or MATCH_YES if the specifier was correct and the binding label and
5142 bind(c) fields were set correctly for the given symbol or the
5143 current_ts. If allow_binding_name is false, no binding name may be
5147 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5149 /* binding label, if exists */
5150 char binding_label
[GFC_MAX_SYMBOL_LEN
+ 1];
5154 /* Initialize the flag that specifies whether we encountered a NAME=
5155 specifier or not. */
5156 has_name_equals
= 0;
5158 /* Init the first char to nil so we can catch if we don't have
5159 the label (name attr) or the symbol name yet. */
5160 binding_label
[0] = '\0';
5162 /* This much we have to be able to match, in this order, if
5163 there is a bind(c) label. */
5164 if (gfc_match (" bind ( c ") != MATCH_YES
)
5167 /* Now see if there is a binding label, or if we've reached the
5168 end of the bind(c) attribute without one. */
5169 if (gfc_match_char (',') == MATCH_YES
)
5171 if (gfc_match (" name = ") != MATCH_YES
)
5173 gfc_error ("Syntax error in NAME= specifier for binding label "
5175 /* should give an error message here */
5179 has_name_equals
= 1;
5181 /* Get the opening quote. */
5182 double_quote
= MATCH_YES
;
5183 single_quote
= MATCH_YES
;
5184 double_quote
= gfc_match_char ('"');
5185 if (double_quote
!= MATCH_YES
)
5186 single_quote
= gfc_match_char ('\'');
5187 if (double_quote
!= MATCH_YES
&& single_quote
!= MATCH_YES
)
5189 gfc_error ("Syntax error in NAME= specifier for binding label "
5194 /* Grab the binding label, using functions that will not lower
5195 case the names automatically. */
5196 if (gfc_match_name_C (binding_label
) != MATCH_YES
)
5199 /* Get the closing quotation. */
5200 if (double_quote
== MATCH_YES
)
5202 if (gfc_match_char ('"') != MATCH_YES
)
5204 gfc_error ("Missing closing quote '\"' for binding label at %C");
5205 /* User started string with '"' so looked to match it. */
5211 if (gfc_match_char ('\'') != MATCH_YES
)
5213 gfc_error ("Missing closing quote '\'' for binding label at %C");
5214 /* User started string with "'" char. */
5220 /* Get the required right paren. */
5221 if (gfc_match_char (')') != MATCH_YES
)
5223 gfc_error ("Missing closing paren for binding label at %C");
5227 if (has_name_equals
&& !allow_binding_name
)
5229 gfc_error ("No binding name is allowed in BIND(C) at %C");
5233 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5235 gfc_error ("For dummy procedure %s, no binding name is "
5236 "allowed in BIND(C) at %C", sym
->name
);
5241 /* Save the binding label to the symbol. If sym is null, we're
5242 probably matching the typespec attributes of a declaration and
5243 haven't gotten the name yet, and therefore, no symbol yet. */
5244 if (binding_label
[0] != '\0')
5248 strcpy (sym
->binding_label
, binding_label
);
5251 strcpy (curr_binding_label
, binding_label
);
5253 else if (allow_binding_name
)
5255 /* No binding label, but if symbol isn't null, we
5256 can set the label for it here.
5257 If name="" or allow_binding_name is false, no C binding name is
5259 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
5260 strncpy (sym
->binding_label
, sym
->name
, strlen (sym
->name
) + 1);
5263 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
5264 && current_interface
.type
== INTERFACE_ABSTRACT
)
5266 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5274 /* Return nonzero if we're currently compiling a contained procedure. */
5277 contained_procedure (void)
5279 gfc_state_data
*s
= gfc_state_stack
;
5281 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
5282 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
5288 /* Set the kind of each enumerator. The kind is selected such that it is
5289 interoperable with the corresponding C enumeration type, making
5290 sure that -fshort-enums is honored. */
5295 enumerator_history
*current_history
= NULL
;
5299 if (max_enum
== NULL
|| enum_history
== NULL
)
5302 if (!flag_short_enums
)
5308 kind
= gfc_integer_kinds
[i
++].kind
;
5310 while (kind
< gfc_c_int_kind
5311 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
5314 current_history
= enum_history
;
5315 while (current_history
!= NULL
)
5317 current_history
->sym
->ts
.kind
= kind
;
5318 current_history
= current_history
->next
;
5323 /* Match any of the various end-block statements. Returns the type of
5324 END to the caller. The END INTERFACE, END IF, END DO and END
5325 SELECT statements cannot be replaced by a single END statement. */
5328 gfc_match_end (gfc_statement
*st
)
5330 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5331 gfc_compile_state state
;
5333 const char *block_name
;
5338 old_loc
= gfc_current_locus
;
5339 if (gfc_match ("end") != MATCH_YES
)
5342 state
= gfc_current_state ();
5343 block_name
= gfc_current_block () == NULL
5344 ? NULL
: gfc_current_block ()->name
;
5346 if (state
== COMP_CONTAINS
|| state
== COMP_DERIVED_CONTAINS
)
5348 state
= gfc_state_stack
->previous
->state
;
5349 block_name
= gfc_state_stack
->previous
->sym
== NULL
5350 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
5357 *st
= ST_END_PROGRAM
;
5358 target
= " program";
5362 case COMP_SUBROUTINE
:
5363 *st
= ST_END_SUBROUTINE
;
5364 target
= " subroutine";
5365 eos_ok
= !contained_procedure ();
5369 *st
= ST_END_FUNCTION
;
5370 target
= " function";
5371 eos_ok
= !contained_procedure ();
5374 case COMP_BLOCK_DATA
:
5375 *st
= ST_END_BLOCK_DATA
;
5376 target
= " block data";
5381 *st
= ST_END_MODULE
;
5386 case COMP_INTERFACE
:
5387 *st
= ST_END_INTERFACE
;
5388 target
= " interface";
5393 case COMP_DERIVED_CONTAINS
:
5412 *st
= ST_END_SELECT
;
5418 *st
= ST_END_FORALL
;
5433 last_initializer
= NULL
;
5435 gfc_free_enum_history ();
5439 gfc_error ("Unexpected END statement at %C");
5443 if (gfc_match_eos () == MATCH_YES
)
5447 /* We would have required END [something]. */
5448 gfc_error ("%s statement expected at %L",
5449 gfc_ascii_statement (*st
), &old_loc
);
5456 /* Verify that we've got the sort of end-block that we're expecting. */
5457 if (gfc_match (target
) != MATCH_YES
)
5459 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st
));
5463 /* If we're at the end, make sure a block name wasn't required. */
5464 if (gfc_match_eos () == MATCH_YES
)
5467 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
5468 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
)
5471 if (gfc_current_block () == NULL
)
5474 gfc_error ("Expected block name of '%s' in %s statement at %C",
5475 block_name
, gfc_ascii_statement (*st
));
5480 /* END INTERFACE has a special handler for its several possible endings. */
5481 if (*st
== ST_END_INTERFACE
)
5482 return gfc_match_end_interface ();
5484 /* We haven't hit the end of statement, so what is left must be an
5486 m
= gfc_match_space ();
5488 m
= gfc_match_name (name
);
5491 gfc_error ("Expected terminating name at %C");
5495 if (block_name
== NULL
)
5498 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
5500 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
5501 gfc_ascii_statement (*st
));
5504 /* Procedure pointer as function result. */
5505 else if (strcmp (block_name
, "ppr@") == 0
5506 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
5508 gfc_error ("Expected label '%s' for %s statement at %C",
5509 gfc_current_block ()->ns
->proc_name
->name
,
5510 gfc_ascii_statement (*st
));
5514 if (gfc_match_eos () == MATCH_YES
)
5518 gfc_syntax_error (*st
);
5521 gfc_current_locus
= old_loc
;
5527 /***************** Attribute declaration statements ****************/
5529 /* Set the attribute of a single variable. */
5534 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5542 m
= gfc_match_name (name
);
5546 if (find_special (name
, &sym
, false))
5549 var_locus
= gfc_current_locus
;
5551 /* Deal with possible array specification for certain attributes. */
5552 if (current_attr
.dimension
5553 || current_attr
.allocatable
5554 || current_attr
.pointer
5555 || current_attr
.target
)
5557 m
= gfc_match_array_spec (&as
);
5558 if (m
== MATCH_ERROR
)
5561 if (current_attr
.dimension
&& m
== MATCH_NO
)
5563 gfc_error ("Missing array specification at %L in DIMENSION "
5564 "statement", &var_locus
);
5569 if (current_attr
.dimension
&& sym
->value
)
5571 gfc_error ("Dimensions specified for %s at %L after its "
5572 "initialisation", sym
->name
, &var_locus
);
5577 if ((current_attr
.allocatable
|| current_attr
.pointer
)
5578 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
5580 gfc_error ("Array specification must be deferred at %L", &var_locus
);
5586 /* Update symbol table. DIMENSION attribute is set
5587 in gfc_set_array_spec(). */
5588 if (current_attr
.dimension
== 0
5589 && gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
) == FAILURE
)
5595 if (gfc_set_array_spec (sym
, as
, &var_locus
) == FAILURE
)
5601 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
5603 /* Fix the array spec. */
5604 m
= gfc_mod_pointee_as (sym
->as
);
5605 if (m
== MATCH_ERROR
)
5609 if (gfc_add_attribute (&sym
->attr
, &var_locus
) == FAILURE
)
5615 if ((current_attr
.external
|| current_attr
.intrinsic
)
5616 && sym
->attr
.flavor
!= FL_PROCEDURE
5617 && gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
) == FAILURE
)
5623 add_hidden_procptr_result (sym
);
5628 gfc_free_array_spec (as
);
5633 /* Generic attribute declaration subroutine. Used for attributes that
5634 just have a list of names. */
5641 /* Gobble the optional double colon, by simply ignoring the result
5651 if (gfc_match_eos () == MATCH_YES
)
5657 if (gfc_match_char (',') != MATCH_YES
)
5659 gfc_error ("Unexpected character in variable list at %C");
5669 /* This routine matches Cray Pointer declarations of the form:
5670 pointer ( <pointer>, <pointee> )
5672 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5673 The pointer, if already declared, should be an integer. Otherwise, we
5674 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5675 be either a scalar, or an array declaration. No space is allocated for
5676 the pointee. For the statement
5677 pointer (ipt, ar(10))
5678 any subsequent uses of ar will be translated (in C-notation) as
5679 ar(i) => ((<type> *) ipt)(i)
5680 After gimplification, pointee variable will disappear in the code. */
5683 cray_pointer_decl (void)
5687 gfc_symbol
*cptr
; /* Pointer symbol. */
5688 gfc_symbol
*cpte
; /* Pointee symbol. */
5694 if (gfc_match_char ('(') != MATCH_YES
)
5696 gfc_error ("Expected '(' at %C");
5700 /* Match pointer. */
5701 var_locus
= gfc_current_locus
;
5702 gfc_clear_attr (¤t_attr
);
5703 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
5704 current_ts
.type
= BT_INTEGER
;
5705 current_ts
.kind
= gfc_index_integer_kind
;
5707 m
= gfc_match_symbol (&cptr
, 0);
5710 gfc_error ("Expected variable name at %C");
5714 if (gfc_add_cray_pointer (&cptr
->attr
, &var_locus
) == FAILURE
)
5717 gfc_set_sym_referenced (cptr
);
5719 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
5721 cptr
->ts
.type
= BT_INTEGER
;
5722 cptr
->ts
.kind
= gfc_index_integer_kind
;
5724 else if (cptr
->ts
.type
!= BT_INTEGER
)
5726 gfc_error ("Cray pointer at %C must be an integer");
5729 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
5730 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5731 " memory addresses require %d bytes",
5732 cptr
->ts
.kind
, gfc_index_integer_kind
);
5734 if (gfc_match_char (',') != MATCH_YES
)
5736 gfc_error ("Expected \",\" at %C");
5740 /* Match Pointee. */
5741 var_locus
= gfc_current_locus
;
5742 gfc_clear_attr (¤t_attr
);
5743 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
5744 current_ts
.type
= BT_UNKNOWN
;
5745 current_ts
.kind
= 0;
5747 m
= gfc_match_symbol (&cpte
, 0);
5750 gfc_error ("Expected variable name at %C");
5754 /* Check for an optional array spec. */
5755 m
= gfc_match_array_spec (&as
);
5756 if (m
== MATCH_ERROR
)
5758 gfc_free_array_spec (as
);
5761 else if (m
== MATCH_NO
)
5763 gfc_free_array_spec (as
);
5767 if (gfc_add_cray_pointee (&cpte
->attr
, &var_locus
) == FAILURE
)
5770 gfc_set_sym_referenced (cpte
);
5772 if (cpte
->as
== NULL
)
5774 if (gfc_set_array_spec (cpte
, as
, &var_locus
) == FAILURE
)
5775 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5777 else if (as
!= NULL
)
5779 gfc_error ("Duplicate array spec for Cray pointee at %C");
5780 gfc_free_array_spec (as
);
5786 if (cpte
->as
!= NULL
)
5788 /* Fix array spec. */
5789 m
= gfc_mod_pointee_as (cpte
->as
);
5790 if (m
== MATCH_ERROR
)
5794 /* Point the Pointee at the Pointer. */
5795 cpte
->cp_pointer
= cptr
;
5797 if (gfc_match_char (')') != MATCH_YES
)
5799 gfc_error ("Expected \")\" at %C");
5802 m
= gfc_match_char (',');
5804 done
= true; /* Stop searching for more declarations. */
5808 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
5809 || gfc_match_eos () != MATCH_YES
)
5811 gfc_error ("Expected \",\" or end of statement at %C");
5819 gfc_match_external (void)
5822 gfc_clear_attr (¤t_attr
);
5823 current_attr
.external
= 1;
5825 return attr_decl ();
5830 gfc_match_intent (void)
5834 intent
= match_intent_spec ();
5835 if (intent
== INTENT_UNKNOWN
)
5838 gfc_clear_attr (¤t_attr
);
5839 current_attr
.intent
= intent
;
5841 return attr_decl ();
5846 gfc_match_intrinsic (void)
5849 gfc_clear_attr (¤t_attr
);
5850 current_attr
.intrinsic
= 1;
5852 return attr_decl ();
5857 gfc_match_optional (void)
5860 gfc_clear_attr (¤t_attr
);
5861 current_attr
.optional
= 1;
5863 return attr_decl ();
5868 gfc_match_pointer (void)
5870 gfc_gobble_whitespace ();
5871 if (gfc_peek_ascii_char () == '(')
5873 if (!gfc_option
.flag_cray_pointer
)
5875 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5879 return cray_pointer_decl ();
5883 gfc_clear_attr (¤t_attr
);
5884 current_attr
.pointer
= 1;
5886 return attr_decl ();
5892 gfc_match_allocatable (void)
5894 gfc_clear_attr (¤t_attr
);
5895 current_attr
.allocatable
= 1;
5897 return attr_decl ();
5902 gfc_match_dimension (void)
5904 gfc_clear_attr (¤t_attr
);
5905 current_attr
.dimension
= 1;
5907 return attr_decl ();
5912 gfc_match_target (void)
5914 gfc_clear_attr (¤t_attr
);
5915 current_attr
.target
= 1;
5917 return attr_decl ();
5921 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5925 access_attr_decl (gfc_statement st
)
5927 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5928 interface_type type
;
5931 gfc_intrinsic_op op
;
5934 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
5939 m
= gfc_match_generic_spec (&type
, name
, &op
);
5942 if (m
== MATCH_ERROR
)
5947 case INTERFACE_NAMELESS
:
5948 case INTERFACE_ABSTRACT
:
5951 case INTERFACE_GENERIC
:
5952 if (gfc_get_symbol (name
, NULL
, &sym
))
5955 if (gfc_add_access (&sym
->attr
, (st
== ST_PUBLIC
)
5956 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
5957 sym
->name
, NULL
) == FAILURE
)
5962 case INTERFACE_INTRINSIC_OP
:
5963 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
5965 gfc_current_ns
->operator_access
[op
] =
5966 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
5970 gfc_error ("Access specification of the %s operator at %C has "
5971 "already been specified", gfc_op2string (op
));
5977 case INTERFACE_USER_OP
:
5978 uop
= gfc_get_uop (name
);
5980 if (uop
->access
== ACCESS_UNKNOWN
)
5982 uop
->access
= (st
== ST_PUBLIC
)
5983 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
5987 gfc_error ("Access specification of the .%s. operator at %C "
5988 "has already been specified", sym
->name
);
5995 if (gfc_match_char (',') == MATCH_NO
)
5999 if (gfc_match_eos () != MATCH_YES
)
6004 gfc_syntax_error (st
);
6012 gfc_match_protected (void)
6017 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6019 gfc_error ("PROTECTED at %C only allowed in specification "
6020 "part of a module");
6025 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED statement at %C")
6029 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6034 if (gfc_match_eos () == MATCH_YES
)
6039 m
= gfc_match_symbol (&sym
, 0);
6043 if (gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6056 if (gfc_match_eos () == MATCH_YES
)
6058 if (gfc_match_char (',') != MATCH_YES
)
6065 gfc_error ("Syntax error in PROTECTED statement at %C");
6070 /* The PRIVATE statement is a bit weird in that it can be an attribute
6071 declaration, but also works as a standalone statement inside of a
6072 type declaration or a module. */
6075 gfc_match_private (gfc_statement
*st
)
6078 if (gfc_match ("private") != MATCH_YES
)
6081 if (gfc_current_state () != COMP_MODULE
6082 && !(gfc_current_state () == COMP_DERIVED
6083 && gfc_state_stack
->previous
6084 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
6085 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6086 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
6087 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
6089 gfc_error ("PRIVATE statement at %C is only allowed in the "
6090 "specification part of a module");
6094 if (gfc_current_state () == COMP_DERIVED
)
6096 if (gfc_match_eos () == MATCH_YES
)
6102 gfc_syntax_error (ST_PRIVATE
);
6106 if (gfc_match_eos () == MATCH_YES
)
6113 return access_attr_decl (ST_PRIVATE
);
6118 gfc_match_public (gfc_statement
*st
)
6121 if (gfc_match ("public") != MATCH_YES
)
6124 if (gfc_current_state () != COMP_MODULE
)
6126 gfc_error ("PUBLIC statement at %C is only allowed in the "
6127 "specification part of a module");
6131 if (gfc_match_eos () == MATCH_YES
)
6138 return access_attr_decl (ST_PUBLIC
);
6142 /* Workhorse for gfc_match_parameter. */
6151 m
= gfc_match_symbol (&sym
, 0);
6153 gfc_error ("Expected variable name at %C in PARAMETER statement");
6158 if (gfc_match_char ('=') == MATCH_NO
)
6160 gfc_error ("Expected = sign in PARAMETER statement at %C");
6164 m
= gfc_match_init_expr (&init
);
6166 gfc_error ("Expected expression at %C in PARAMETER statement");
6170 if (sym
->ts
.type
== BT_UNKNOWN
6171 && gfc_set_default_type (sym
, 1, NULL
) == FAILURE
)
6177 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
6178 || gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
) == FAILURE
)
6186 gfc_error ("Initializing already initialized variable at %C");
6191 if (sym
->ts
.type
== BT_CHARACTER
6192 && sym
->ts
.cl
!= NULL
6193 && sym
->ts
.cl
->length
!= NULL
6194 && sym
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
6195 && init
->expr_type
== EXPR_CONSTANT
6196 && init
->ts
.type
== BT_CHARACTER
)
6197 gfc_set_constant_character_len (
6198 mpz_get_si (sym
->ts
.cl
->length
->value
.integer
), init
, -1);
6199 else if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.cl
!= NULL
6200 && sym
->ts
.cl
->length
== NULL
)
6203 if (init
->expr_type
== EXPR_CONSTANT
)
6205 clen
= init
->value
.character
.length
;
6206 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
6208 else if (init
->expr_type
== EXPR_ARRAY
)
6210 gfc_expr
*p
= init
->value
.constructor
->expr
;
6211 clen
= p
->value
.character
.length
;
6212 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
6214 else if (init
->ts
.cl
&& init
->ts
.cl
->length
)
6215 sym
->ts
.cl
->length
= gfc_copy_expr (sym
->value
->ts
.cl
->length
);
6222 gfc_free_expr (init
);
6227 /* Match a parameter statement, with the weird syntax that these have. */
6230 gfc_match_parameter (void)
6234 if (gfc_match_char ('(') == MATCH_NO
)
6243 if (gfc_match (" )%t") == MATCH_YES
)
6246 if (gfc_match_char (',') != MATCH_YES
)
6248 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6258 /* Save statements have a special syntax. */
6261 gfc_match_save (void)
6263 char n
[GFC_MAX_SYMBOL_LEN
+1];
6268 if (gfc_match_eos () == MATCH_YES
)
6270 if (gfc_current_ns
->seen_save
)
6272 if (gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
6273 "follows previous SAVE statement")
6278 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
6282 if (gfc_current_ns
->save_all
)
6284 if (gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
6285 "blanket SAVE statement")
6294 m
= gfc_match_symbol (&sym
, 0);
6298 if (gfc_add_save (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6310 m
= gfc_match (" / %n /", &n
);
6311 if (m
== MATCH_ERROR
)
6316 c
= gfc_get_common (n
, 0);
6319 gfc_current_ns
->seen_save
= 1;
6322 if (gfc_match_eos () == MATCH_YES
)
6324 if (gfc_match_char (',') != MATCH_YES
)
6331 gfc_error ("Syntax error in SAVE statement at %C");
6337 gfc_match_value (void)
6342 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE statement at %C")
6346 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6351 if (gfc_match_eos () == MATCH_YES
)
6356 m
= gfc_match_symbol (&sym
, 0);
6360 if (gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6373 if (gfc_match_eos () == MATCH_YES
)
6375 if (gfc_match_char (',') != MATCH_YES
)
6382 gfc_error ("Syntax error in VALUE statement at %C");
6388 gfc_match_volatile (void)
6393 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VOLATILE statement at %C")
6397 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6402 if (gfc_match_eos () == MATCH_YES
)
6407 /* VOLATILE is special because it can be added to host-associated
6409 m
= gfc_match_symbol (&sym
, 1);
6413 if (gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6426 if (gfc_match_eos () == MATCH_YES
)
6428 if (gfc_match_char (',') != MATCH_YES
)
6435 gfc_error ("Syntax error in VOLATILE statement at %C");
6440 /* Match a module procedure statement. Note that we have to modify
6441 symbols in the parent's namespace because the current one was there
6442 to receive symbols that are in an interface's formal argument list. */
6445 gfc_match_modproc (void)
6447 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6450 gfc_namespace
*module_ns
;
6451 gfc_interface
*old_interface_head
, *interface
;
6453 if (gfc_state_stack
->state
!= COMP_INTERFACE
6454 || gfc_state_stack
->previous
== NULL
6455 || current_interface
.type
== INTERFACE_NAMELESS
6456 || current_interface
.type
== INTERFACE_ABSTRACT
)
6458 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6463 module_ns
= gfc_current_ns
->parent
;
6464 for (; module_ns
; module_ns
= module_ns
->parent
)
6465 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
)
6468 if (module_ns
== NULL
)
6471 /* Store the current state of the interface. We will need it if we
6472 end up with a syntax error and need to recover. */
6473 old_interface_head
= gfc_current_interface_head ();
6479 m
= gfc_match_name (name
);
6485 /* Check for syntax error before starting to add symbols to the
6486 current namespace. */
6487 if (gfc_match_eos () == MATCH_YES
)
6489 if (!last
&& gfc_match_char (',') != MATCH_YES
)
6492 /* Now we're sure the syntax is valid, we process this item
6494 if (gfc_get_symbol (name
, module_ns
, &sym
))
6497 if (sym
->attr
.proc
!= PROC_MODULE
6498 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
6499 sym
->name
, NULL
) == FAILURE
)
6502 if (gfc_add_interface (sym
) == FAILURE
)
6505 sym
->attr
.mod_proc
= 1;
6514 /* Restore the previous state of the interface. */
6515 interface
= gfc_current_interface_head ();
6516 gfc_set_current_interface_head (old_interface_head
);
6518 /* Free the new interfaces. */
6519 while (interface
!= old_interface_head
)
6521 gfc_interface
*i
= interface
->next
;
6522 gfc_free (interface
);
6526 /* And issue a syntax error. */
6527 gfc_syntax_error (ST_MODULE_PROC
);
6532 /* Check a derived type that is being extended. */
6534 check_extended_derived_type (char *name
)
6536 gfc_symbol
*extended
;
6538 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
6540 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6546 gfc_error ("No such symbol in TYPE definition at %C");
6550 if (extended
->attr
.flavor
!= FL_DERIVED
)
6552 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6553 "derived type", name
);
6557 if (extended
->attr
.is_bind_c
)
6559 gfc_error ("'%s' cannot be extended at %C because it "
6560 "is BIND(C)", extended
->name
);
6564 if (extended
->attr
.sequence
)
6566 gfc_error ("'%s' cannot be extended at %C because it "
6567 "is a SEQUENCE type", extended
->name
);
6575 /* Match the optional attribute specifiers for a type declaration.
6576 Return MATCH_ERROR if an error is encountered in one of the handled
6577 attributes (public, private, bind(c)), MATCH_NO if what's found is
6578 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6579 checking on attribute conflicts needs to be done. */
6582 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
6584 /* See if the derived type is marked as private. */
6585 if (gfc_match (" , private") == MATCH_YES
)
6587 if (gfc_current_state () != COMP_MODULE
)
6589 gfc_error ("Derived type at %C can only be PRIVATE in the "
6590 "specification part of a module");
6594 if (gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
) == FAILURE
)
6597 else if (gfc_match (" , public") == MATCH_YES
)
6599 if (gfc_current_state () != COMP_MODULE
)
6601 gfc_error ("Derived type at %C can only be PUBLIC in the "
6602 "specification part of a module");
6606 if (gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
) == FAILURE
)
6609 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
6611 /* If the type is defined to be bind(c) it then needs to make
6612 sure that all fields are interoperable. This will
6613 need to be a semantic check on the finished derived type.
6614 See 15.2.3 (lines 9-12) of F2003 draft. */
6615 if (gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0) != SUCCESS
)
6618 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6620 else if (gfc_match (" , abstract") == MATCH_YES
)
6622 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ABSTRACT type at %C")
6626 if (gfc_add_abstract (attr
, &gfc_current_locus
) == FAILURE
)
6629 else if (name
&& gfc_match(" , extends ( %n )", name
) == MATCH_YES
)
6631 if (gfc_add_extension (attr
, &gfc_current_locus
) == FAILURE
)
6637 /* If we get here, something matched. */
6642 /* Match the beginning of a derived type declaration. If a type name
6643 was the result of a function, then it is possible to have a symbol
6644 already to be known as a derived type yet have no components. */
6647 gfc_match_derived_decl (void)
6649 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6650 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
6651 symbol_attribute attr
;
6653 gfc_symbol
*extended
;
6655 match is_type_attr_spec
= MATCH_NO
;
6656 bool seen_attr
= false;
6658 if (gfc_current_state () == COMP_DERIVED
)
6663 gfc_clear_attr (&attr
);
6668 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
6669 if (is_type_attr_spec
== MATCH_ERROR
)
6671 if (is_type_attr_spec
== MATCH_YES
)
6673 } while (is_type_attr_spec
== MATCH_YES
);
6675 /* Deal with derived type extensions. The extension attribute has
6676 been added to 'attr' but now the parent type must be found and
6679 extended
= check_extended_derived_type (parent
);
6681 if (parent
[0] && !extended
)
6684 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
6686 gfc_error ("Expected :: in TYPE definition at %C");
6690 m
= gfc_match (" %n%t", name
);
6694 /* Make sure the name is not the name of an intrinsic type. */
6695 if (gfc_is_intrinsic_typename (name
))
6697 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6702 if (gfc_get_symbol (name
, NULL
, &sym
))
6705 if (sym
->ts
.type
!= BT_UNKNOWN
)
6707 gfc_error ("Derived type name '%s' at %C already has a basic type "
6708 "of %s", sym
->name
, gfc_typename (&sym
->ts
));
6712 /* The symbol may already have the derived attribute without the
6713 components. The ways this can happen is via a function
6714 definition, an INTRINSIC statement or a subtype in another
6715 derived type that is a pointer. The first part of the AND clause
6716 is true if the symbol is not the return value of a function. */
6717 if (sym
->attr
.flavor
!= FL_DERIVED
6718 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
6721 if (sym
->components
!= NULL
|| sym
->attr
.zero_comp
)
6723 gfc_error ("Derived type definition of '%s' at %C has already been "
6724 "defined", sym
->name
);
6728 if (attr
.access
!= ACCESS_UNKNOWN
6729 && gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
) == FAILURE
)
6732 /* See if the derived type was labeled as bind(c). */
6733 if (attr
.is_bind_c
!= 0)
6734 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
6736 /* Construct the f2k_derived namespace if it is not yet there. */
6737 if (!sym
->f2k_derived
)
6738 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
6740 if (extended
&& !sym
->components
)
6745 /* Add the extended derived type as the first component. */
6746 gfc_add_component (sym
, parent
, &p
);
6747 sym
->attr
.extension
= attr
.extension
;
6749 gfc_set_sym_referenced (extended
);
6751 p
->ts
.type
= BT_DERIVED
;
6752 p
->ts
.derived
= extended
;
6753 p
->initializer
= gfc_default_initializer (&p
->ts
);
6755 /* Provide the links between the extended type and its extension. */
6756 if (!extended
->f2k_derived
)
6757 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
6758 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
6762 /* Take over the ABSTRACT attribute. */
6763 sym
->attr
.abstract
= attr
.abstract
;
6765 gfc_new_block
= sym
;
6771 /* Cray Pointees can be declared as:
6772 pointer (ipt, a (n,m,...,*))
6773 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6774 cheat and set a constant bound of 1 for the last dimension, if this
6775 is the case. Since there is no bounds-checking for Cray Pointees,
6776 this will be okay. */
6779 gfc_mod_pointee_as (gfc_array_spec
*as
)
6781 as
->cray_pointee
= true; /* This will be useful to know later. */
6782 if (as
->type
== AS_ASSUMED_SIZE
)
6784 as
->type
= AS_EXPLICIT
;
6785 as
->upper
[as
->rank
- 1] = gfc_int_expr (1);
6786 as
->cp_was_assumed
= true;
6788 else if (as
->type
== AS_ASSUMED_SHAPE
)
6790 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6797 /* Match the enum definition statement, here we are trying to match
6798 the first line of enum definition statement.
6799 Returns MATCH_YES if match is found. */
6802 gfc_match_enum (void)
6806 m
= gfc_match_eos ();
6810 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ENUM and ENUMERATOR at %C")
6818 /* Returns an initializer whose value is one higher than the value of the
6819 LAST_INITIALIZER argument. If the argument is NULL, the
6820 initializers value will be set to zero. The initializer's kind
6821 will be set to gfc_c_int_kind.
6823 If -fshort-enums is given, the appropriate kind will be selected
6824 later after all enumerators have been parsed. A warning is issued
6825 here if an initializer exceeds gfc_c_int_kind. */
6828 enum_initializer (gfc_expr
*last_initializer
, locus where
)
6832 result
= gfc_get_expr ();
6833 result
->expr_type
= EXPR_CONSTANT
;
6834 result
->ts
.type
= BT_INTEGER
;
6835 result
->ts
.kind
= gfc_c_int_kind
;
6836 result
->where
= where
;
6838 mpz_init (result
->value
.integer
);
6840 if (last_initializer
!= NULL
)
6842 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
6843 result
->where
= last_initializer
->where
;
6845 if (gfc_check_integer_range (result
->value
.integer
,
6846 gfc_c_int_kind
) != ARITH_OK
)
6848 gfc_error ("Enumerator exceeds the C integer type at %C");
6854 /* Control comes here, if it's the very first enumerator and no
6855 initializer has been given. It will be initialized to zero. */
6856 mpz_set_si (result
->value
.integer
, 0);
6863 /* Match a variable name with an optional initializer. When this
6864 subroutine is called, a variable is expected to be parsed next.
6865 Depending on what is happening at the moment, updates either the
6866 symbol table or the current interface. */
6869 enumerator_decl (void)
6871 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6872 gfc_expr
*initializer
;
6873 gfc_array_spec
*as
= NULL
;
6881 old_locus
= gfc_current_locus
;
6883 /* When we get here, we've just matched a list of attributes and
6884 maybe a type and a double colon. The next thing we expect to see
6885 is the name of the symbol. */
6886 m
= gfc_match_name (name
);
6890 var_locus
= gfc_current_locus
;
6892 /* OK, we've successfully matched the declaration. Now put the
6893 symbol in the current namespace. If we fail to create the symbol,
6895 if (build_sym (name
, NULL
, &as
, &var_locus
) == FAILURE
)
6901 /* The double colon must be present in order to have initializers.
6902 Otherwise the statement is ambiguous with an assignment statement. */
6905 if (gfc_match_char ('=') == MATCH_YES
)
6907 m
= gfc_match_init_expr (&initializer
);
6910 gfc_error ("Expected an initialization expression at %C");
6919 /* If we do not have an initializer, the initialization value of the
6920 previous enumerator (stored in last_initializer) is incremented
6921 by 1 and is used to initialize the current enumerator. */
6922 if (initializer
== NULL
)
6923 initializer
= enum_initializer (last_initializer
, old_locus
);
6925 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
6927 gfc_error("ENUMERATOR %L not initialized with integer expression",
6930 gfc_free_enum_history ();
6934 /* Store this current initializer, for the next enumerator variable
6935 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6936 use last_initializer below. */
6937 last_initializer
= initializer
;
6938 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
6940 /* Maintain enumerator history. */
6941 gfc_find_symbol (name
, NULL
, 0, &sym
);
6942 create_enum_history (sym
, last_initializer
);
6944 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
6947 /* Free stuff up and return. */
6948 gfc_free_expr (initializer
);
6954 /* Match the enumerator definition statement. */
6957 gfc_match_enumerator_def (void)
6962 gfc_clear_ts (¤t_ts
);
6964 m
= gfc_match (" enumerator");
6968 m
= gfc_match (" :: ");
6969 if (m
== MATCH_ERROR
)
6972 colon_seen
= (m
== MATCH_YES
);
6974 if (gfc_current_state () != COMP_ENUM
)
6976 gfc_error ("ENUM definition statement expected before %C");
6977 gfc_free_enum_history ();
6981 (¤t_ts
)->type
= BT_INTEGER
;
6982 (¤t_ts
)->kind
= gfc_c_int_kind
;
6984 gfc_clear_attr (¤t_attr
);
6985 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
6994 m
= enumerator_decl ();
6995 if (m
== MATCH_ERROR
)
7000 if (gfc_match_eos () == MATCH_YES
)
7002 if (gfc_match_char (',') != MATCH_YES
)
7006 if (gfc_current_state () == COMP_ENUM
)
7008 gfc_free_enum_history ();
7009 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7014 gfc_free_array_spec (current_as
);
7021 /* Match binding attributes. */
7024 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
7026 bool found_passing
= false;
7027 bool seen_ptr
= false;
7030 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7031 this case the defaults are in there. */
7032 ba
->access
= ACCESS_UNKNOWN
;
7033 ba
->pass_arg
= NULL
;
7034 ba
->pass_arg_num
= 0;
7036 ba
->non_overridable
= 0;
7039 /* If we find a comma, we believe there are binding attributes. */
7040 if (gfc_match_char (',') == MATCH_NO
)
7042 ba
->access
= gfc_typebound_default_access
;
7048 /* Access specifier. */
7050 m
= gfc_match (" public");
7051 if (m
== MATCH_ERROR
)
7055 if (ba
->access
!= ACCESS_UNKNOWN
)
7057 gfc_error ("Duplicate access-specifier at %C");
7061 ba
->access
= ACCESS_PUBLIC
;
7065 m
= gfc_match (" private");
7066 if (m
== MATCH_ERROR
)
7070 if (ba
->access
!= ACCESS_UNKNOWN
)
7072 gfc_error ("Duplicate access-specifier at %C");
7076 ba
->access
= ACCESS_PRIVATE
;
7080 /* If inside GENERIC, the following is not allowed. */
7085 m
= gfc_match (" nopass");
7086 if (m
== MATCH_ERROR
)
7092 gfc_error ("Binding attributes already specify passing,"
7093 " illegal NOPASS at %C");
7097 found_passing
= true;
7102 /* PASS possibly including argument. */
7103 m
= gfc_match (" pass");
7104 if (m
== MATCH_ERROR
)
7108 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
7112 gfc_error ("Binding attributes already specify passing,"
7113 " illegal PASS at %C");
7117 m
= gfc_match (" ( %n )", arg
);
7118 if (m
== MATCH_ERROR
)
7121 ba
->pass_arg
= xstrdup (arg
);
7122 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
7124 found_passing
= true;
7132 m
= gfc_match (" pointer");
7133 if (m
== MATCH_ERROR
)
7139 gfc_error ("Duplicate POINTER attribute at %C");
7150 /* NON_OVERRIDABLE flag. */
7151 m
= gfc_match (" non_overridable");
7152 if (m
== MATCH_ERROR
)
7156 if (ba
->non_overridable
)
7158 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7162 ba
->non_overridable
= 1;
7166 /* DEFERRED flag. */
7167 m
= gfc_match (" deferred");
7168 if (m
== MATCH_ERROR
)
7174 gfc_error ("Duplicate DEFERRED at %C");
7185 /* Nothing matching found. */
7187 gfc_error ("Expected access-specifier at %C");
7189 gfc_error ("Expected binding attribute at %C");
7192 while (gfc_match_char (',') == MATCH_YES
);
7194 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7195 if (ba
->non_overridable
&& ba
->deferred
)
7197 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7201 if (ba
->access
== ACCESS_UNKNOWN
)
7202 ba
->access
= gfc_typebound_default_access
;
7204 if (ppc
&& !seen_ptr
)
7206 gfc_error ("POINTER attribute is required for procedure pointer component"
7214 gfc_free (ba
->pass_arg
);
7219 /* Match a PROCEDURE specific binding inside a derived type. */
7222 match_procedure_in_type (void)
7224 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7225 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
7226 char* target
= NULL
;
7227 gfc_typebound_proc
* tb
;
7235 /* Check current state. */
7236 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
7237 block
= gfc_state_stack
->previous
->sym
;
7240 /* Try to match PROCEDURE(interface). */
7241 if (gfc_match (" (") == MATCH_YES
)
7243 m
= gfc_match_name (target_buf
);
7244 if (m
== MATCH_ERROR
)
7248 gfc_error ("Interface-name expected after '(' at %C");
7252 if (gfc_match (" )") != MATCH_YES
)
7254 gfc_error ("')' expected at %C");
7258 target
= target_buf
;
7261 /* Construct the data structure. */
7262 tb
= gfc_get_typebound_proc ();
7263 tb
->where
= gfc_current_locus
;
7266 /* Match binding attributes. */
7267 m
= match_binding_attributes (tb
, false, false);
7268 if (m
== MATCH_ERROR
)
7270 seen_attrs
= (m
== MATCH_YES
);
7272 /* Check that attribute DEFERRED is given iff an interface is specified, which
7273 means target != NULL. */
7274 if (tb
->deferred
&& !target
)
7276 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7279 if (target
&& !tb
->deferred
)
7281 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7285 /* Match the colons. */
7286 m
= gfc_match (" ::");
7287 if (m
== MATCH_ERROR
)
7289 seen_colons
= (m
== MATCH_YES
);
7290 if (seen_attrs
&& !seen_colons
)
7292 gfc_error ("Expected '::' after binding-attributes at %C");
7296 /* Match the binding name. */
7297 m
= gfc_match_name (name
);
7298 if (m
== MATCH_ERROR
)
7302 gfc_error ("Expected binding name at %C");
7306 /* Try to match the '=> target', if it's there. */
7307 m
= gfc_match (" =>");
7308 if (m
== MATCH_ERROR
)
7314 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7320 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7325 m
= gfc_match_name (target_buf
);
7326 if (m
== MATCH_ERROR
)
7330 gfc_error ("Expected binding target after '=>' at %C");
7333 target
= target_buf
;
7336 /* Now we should have the end. */
7337 m
= gfc_match_eos ();
7338 if (m
== MATCH_ERROR
)
7342 gfc_error ("Junk after PROCEDURE declaration at %C");
7346 /* If no target was found, it has the same name as the binding. */
7350 /* Get the namespace to insert the symbols into. */
7351 ns
= block
->f2k_derived
;
7354 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7355 if (tb
->deferred
&& !block
->attr
.abstract
)
7357 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7362 /* See if we already have a binding with this name in the symtree which would
7363 be an error. If a GENERIC already targetted this binding, it may be
7364 already there but then typebound is still NULL. */
7365 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7366 if (stree
&& stree
->n
.tb
)
7368 gfc_error ("There's already a procedure with binding name '%s' for the"
7369 " derived type '%s' at %C", name
, block
->name
);
7373 /* Insert it and set attributes. */
7377 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7382 if (gfc_get_sym_tree (target
, gfc_current_ns
, &tb
->u
.specific
, false))
7384 gfc_set_sym_referenced (tb
->u
.specific
->n
.sym
);
7390 /* Match a GENERIC procedure binding inside a derived type. */
7393 gfc_match_generic (void)
7395 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7397 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
7398 gfc_typebound_proc
* tb
;
7403 /* Check current state. */
7404 if (gfc_current_state () == COMP_DERIVED
)
7406 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7409 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
7411 block
= gfc_state_stack
->previous
->sym
;
7412 ns
= block
->f2k_derived
;
7413 gcc_assert (block
&& ns
);
7415 /* See if we get an access-specifier. */
7416 m
= match_binding_attributes (&tbattr
, true, false);
7417 if (m
== MATCH_ERROR
)
7420 /* Now the colons, those are required. */
7421 if (gfc_match (" ::") != MATCH_YES
)
7423 gfc_error ("Expected '::' at %C");
7427 /* The binding name and =>. */
7428 m
= gfc_match (" %n =>", name
);
7429 if (m
== MATCH_ERROR
)
7433 gfc_error ("Expected generic name at %C");
7437 /* If there's already something with this name, check that it is another
7438 GENERIC and then extend that rather than build a new node. */
7439 st
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7442 gcc_assert (st
->n
.tb
);
7445 if (!tb
->is_generic
)
7447 gfc_error ("There's already a non-generic procedure with binding name"
7448 " '%s' for the derived type '%s' at %C",
7453 if (tb
->access
!= tbattr
.access
)
7455 gfc_error ("Binding at %C must have the same access as already"
7456 " defined binding '%s'", name
);
7462 st
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7465 st
->n
.tb
= tb
= gfc_get_typebound_proc ();
7466 tb
->where
= gfc_current_locus
;
7467 tb
->access
= tbattr
.access
;
7469 tb
->u
.generic
= NULL
;
7472 /* Now, match all following names as specific targets. */
7475 gfc_symtree
* target_st
;
7476 gfc_tbp_generic
* target
;
7478 m
= gfc_match_name (name
);
7479 if (m
== MATCH_ERROR
)
7483 gfc_error ("Expected specific binding name at %C");
7487 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
7489 /* See if this is a duplicate specification. */
7490 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
7491 if (target_st
== target
->specific_st
)
7493 gfc_error ("'%s' already defined as specific binding for the"
7494 " generic '%s' at %C", name
, st
->name
);
7498 target
= gfc_get_tbp_generic ();
7499 target
->specific_st
= target_st
;
7500 target
->specific
= NULL
;
7501 target
->next
= tb
->u
.generic
;
7502 tb
->u
.generic
= target
;
7504 while (gfc_match (" ,") == MATCH_YES
);
7506 /* Here should be the end. */
7507 if (gfc_match_eos () != MATCH_YES
)
7509 gfc_error ("Junk after GENERIC binding at %C");
7520 /* Match a FINAL declaration inside a derived type. */
7523 gfc_match_final_decl (void)
7525 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7528 gfc_namespace
* module_ns
;
7532 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
7534 gfc_error ("FINAL declaration at %C must be inside a derived type "
7535 "CONTAINS section");
7539 block
= gfc_state_stack
->previous
->sym
;
7542 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
7543 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
7545 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7546 " specification part of a MODULE");
7550 module_ns
= gfc_current_ns
;
7551 gcc_assert (module_ns
);
7552 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
7554 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7555 if (gfc_match (" ::") == MATCH_ERROR
)
7558 /* Match the sequence of procedure names. */
7565 if (first
&& gfc_match_eos () == MATCH_YES
)
7567 gfc_error ("Empty FINAL at %C");
7571 m
= gfc_match_name (name
);
7574 gfc_error ("Expected module procedure name at %C");
7577 else if (m
!= MATCH_YES
)
7580 if (gfc_match_eos () == MATCH_YES
)
7582 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7584 gfc_error ("Expected ',' at %C");
7588 if (gfc_get_symbol (name
, module_ns
, &sym
))
7590 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
7594 /* Mark the symbol as module procedure. */
7595 if (sym
->attr
.proc
!= PROC_MODULE
7596 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
7597 sym
->name
, NULL
) == FAILURE
)
7600 /* Check if we already have this symbol in the list, this is an error. */
7601 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
7602 if (f
->proc_sym
== sym
)
7604 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7609 /* Add this symbol to the list of finalizers. */
7610 gcc_assert (block
->f2k_derived
);
7612 f
= XCNEW (gfc_finalizer
);
7614 f
->proc_tree
= NULL
;
7615 f
->where
= gfc_current_locus
;
7616 f
->next
= block
->f2k_derived
->finalizers
;
7617 block
->f2k_derived
->finalizers
= f
;
7627 const ext_attr_t ext_attr_list
[] = {
7628 { "dllimport", EXT_ATTR_DLLIMPORT
, "dllimport" },
7629 { "dllexport", EXT_ATTR_DLLEXPORT
, "dllexport" },
7630 { "cdecl", EXT_ATTR_CDECL
, "cdecl" },
7631 { "stdcall", EXT_ATTR_STDCALL
, "stdcall" },
7632 { "fastcall", EXT_ATTR_FASTCALL
, "fastcall" },
7633 { NULL
, EXT_ATTR_LAST
, NULL
}
7636 /* Match a !GCC$ ATTRIBUTES statement of the form:
7637 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7638 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7640 TODO: We should support all GCC attributes using the same syntax for
7641 the attribute list, i.e. the list in C
7642 __attributes(( attribute-list ))
7644 !GCC$ ATTRIBUTES attribute-list ::
7645 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7648 As there is absolutely no risk of confusion, we should never return
7651 gfc_match_gcc_attributes (void)
7653 symbol_attribute attr
;
7654 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7659 gfc_clear_attr (&attr
);
7664 if (gfc_match_name (name
) != MATCH_YES
)
7667 for (id
= 0; id
< EXT_ATTR_LAST
; id
++)
7668 if (strcmp (name
, ext_attr_list
[id
].name
) == 0)
7671 if (id
== EXT_ATTR_LAST
)
7673 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7677 if (gfc_add_ext_attribute (&attr
, id
, &gfc_current_locus
)
7681 gfc_gobble_whitespace ();
7682 ch
= gfc_next_ascii_char ();
7685 /* This is the successful exit condition for the loop. */
7686 if (gfc_next_ascii_char () == ':')
7696 if (gfc_match_eos () == MATCH_YES
)
7701 m
= gfc_match_name (name
);
7705 if (find_special (name
, &sym
, true))
7708 sym
->attr
.ext_attr
|= attr
.ext_attr
;
7710 if (gfc_match_eos () == MATCH_YES
)
7713 if (gfc_match_char (',') != MATCH_YES
)
7720 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");