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
)
704 i
= gfc_get_symbol (name
, NULL
, result
);
708 if (gfc_current_state () != COMP_SUBROUTINE
709 && gfc_current_state () != COMP_FUNCTION
)
712 s
= gfc_state_stack
->previous
;
716 if (s
->state
!= COMP_INTERFACE
)
719 goto end
; /* Nameless interface. */
721 if (strcmp (name
, s
->sym
->name
) == 0)
732 /* Special subroutine for getting a symbol node associated with a
733 procedure name, used in SUBROUTINE and FUNCTION statements. The
734 symbol is created in the parent using with symtree node in the
735 child unit pointing to the symbol. If the current namespace has no
736 parent, then the symbol is just created in the current unit. */
739 get_proc_name (const char *name
, gfc_symbol
**result
, bool module_fcn_entry
)
745 /* Module functions have to be left in their own namespace because
746 they have potentially (almost certainly!) already been referenced.
747 In this sense, they are rather like external functions. This is
748 fixed up in resolve.c(resolve_entries), where the symbol name-
749 space is set to point to the master function, so that the fake
750 result mechanism can work. */
751 if (module_fcn_entry
)
753 /* Present if entry is declared to be a module procedure. */
754 rc
= gfc_find_symbol (name
, gfc_current_ns
->parent
, 0, result
);
757 rc
= gfc_get_symbol (name
, NULL
, result
);
758 else if (!gfc_get_symbol (name
, NULL
, &sym
) && sym
759 && (*result
)->ts
.type
== BT_UNKNOWN
760 && sym
->attr
.flavor
== FL_UNKNOWN
)
761 /* Pick up the typespec for the entry, if declared in the function
762 body. Note that this symbol is FL_UNKNOWN because it will
763 only have appeared in a type declaration. The local symtree
764 is set to point to the module symbol and a unique symtree
765 to the local version. This latter ensures a correct clearing
768 /* If the ENTRY proceeds its specification, we need to ensure
769 that this does not raise a "has no IMPLICIT type" error. */
770 if (sym
->ts
.type
== BT_UNKNOWN
)
771 sym
->attr
.untyped
= 1;
773 (*result
)->ts
= sym
->ts
;
775 /* Put the symbol in the procedure namespace so that, should
776 the ENTRY precede its specification, the specification
778 (*result
)->ns
= gfc_current_ns
;
780 gfc_find_sym_tree (name
, gfc_current_ns
, 0, &st
);
782 st
= gfc_get_unique_symtree (gfc_current_ns
);
787 rc
= gfc_get_symbol (name
, gfc_current_ns
->parent
, result
);
793 gfc_current_ns
->refs
++;
795 if (sym
&& !sym
->gfc_new
&& gfc_current_state () != COMP_INTERFACE
)
797 /* Trap another encompassed procedure with the same name. All
798 these conditions are necessary to avoid picking up an entry
799 whose name clashes with that of the encompassing procedure;
800 this is handled using gsymbols to register unique,globally
802 if (sym
->attr
.flavor
!= 0
803 && sym
->attr
.proc
!= 0
804 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
805 && sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
806 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
807 name
, &sym
->declared_at
);
809 /* Trap a procedure with a name the same as interface in the
810 encompassing scope. */
811 if (sym
->attr
.generic
!= 0
812 && (sym
->attr
.subroutine
|| sym
->attr
.function
)
813 && !sym
->attr
.mod_proc
)
814 gfc_error_now ("Name '%s' at %C is already defined"
815 " as a generic interface at %L",
816 name
, &sym
->declared_at
);
818 /* Trap declarations of attributes in encompassing scope. The
819 signature for this is that ts.kind is set. Legitimate
820 references only set ts.type. */
821 if (sym
->ts
.kind
!= 0
822 && !sym
->attr
.implicit_type
823 && sym
->attr
.proc
== 0
824 && gfc_current_ns
->parent
!= NULL
825 && sym
->attr
.access
== 0
826 && !module_fcn_entry
)
827 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
828 "and must not have attributes declared at %L",
829 name
, &sym
->declared_at
);
832 if (gfc_current_ns
->parent
== NULL
|| *result
== NULL
)
835 /* Module function entries will already have a symtree in
836 the current namespace but will need one at module level. */
837 if (module_fcn_entry
)
839 /* Present if entry is declared to be a module procedure. */
840 rc
= gfc_find_sym_tree (name
, gfc_current_ns
->parent
, 0, &st
);
842 st
= gfc_new_symtree (&gfc_current_ns
->parent
->sym_root
, name
);
845 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, name
);
850 /* See if the procedure should be a module procedure. */
852 if (((sym
->ns
->proc_name
!= NULL
853 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
854 && sym
->attr
.proc
!= PROC_MODULE
)
855 || (module_fcn_entry
&& sym
->attr
.proc
!= PROC_MODULE
))
856 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
857 sym
->name
, NULL
) == FAILURE
)
864 /* Verify that the given symbol representing a parameter is C
865 interoperable, by checking to see if it was marked as such after
866 its declaration. If the given symbol is not interoperable, a
867 warning is reported, thus removing the need to return the status to
868 the calling function. The standard does not require the user use
869 one of the iso_c_binding named constants to declare an
870 interoperable parameter, but we can't be sure if the param is C
871 interop or not if the user doesn't. For example, integer(4) may be
872 legal Fortran, but doesn't have meaning in C. It may interop with
873 a number of the C types, which causes a problem because the
874 compiler can't know which one. This code is almost certainly not
875 portable, and the user will get what they deserve if the C type
876 across platforms isn't always interoperable with integer(4). If
877 the user had used something like integer(c_int) or integer(c_long),
878 the compiler could have automatically handled the varying sizes
882 verify_c_interop_param (gfc_symbol
*sym
)
884 int is_c_interop
= 0;
885 gfc_try retval
= SUCCESS
;
887 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
888 Don't repeat the checks here. */
889 if (sym
->attr
.implicit_type
)
892 /* For subroutines or functions that are passed to a BIND(C) procedure,
893 they're interoperable if they're BIND(C) and their params are all
895 if (sym
->attr
.flavor
== FL_PROCEDURE
)
897 if (sym
->attr
.is_bind_c
== 0)
899 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
900 "attribute to be C interoperable", sym
->name
,
901 &(sym
->declared_at
));
907 if (sym
->attr
.is_c_interop
== 1)
908 /* We've already checked this procedure; don't check it again. */
911 return verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
916 /* See if we've stored a reference to a procedure that owns sym. */
917 if (sym
->ns
!= NULL
&& sym
->ns
->proc_name
!= NULL
)
919 if (sym
->ns
->proc_name
->attr
.is_bind_c
== 1)
922 (verify_c_interop (&(sym
->ts
))
925 if (is_c_interop
!= 1)
927 /* Make personalized messages to give better feedback. */
928 if (sym
->ts
.type
== BT_DERIVED
)
929 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
930 " procedure '%s' but is not C interoperable "
931 "because derived type '%s' is not C interoperable",
932 sym
->name
, &(sym
->declared_at
),
933 sym
->ns
->proc_name
->name
,
934 sym
->ts
.derived
->name
);
936 gfc_warning ("Variable '%s' at %L is a parameter to the "
937 "BIND(C) procedure '%s' but may not be C "
939 sym
->name
, &(sym
->declared_at
),
940 sym
->ns
->proc_name
->name
);
943 /* Character strings are only C interoperable if they have a
945 if (sym
->ts
.type
== BT_CHARACTER
)
947 gfc_charlen
*cl
= sym
->ts
.cl
;
948 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
949 || mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
951 gfc_error ("Character argument '%s' at %L "
952 "must be length 1 because "
953 "procedure '%s' is BIND(C)",
954 sym
->name
, &sym
->declared_at
,
955 sym
->ns
->proc_name
->name
);
960 /* We have to make sure that any param to a bind(c) routine does
961 not have the allocatable, pointer, or optional attributes,
962 according to J3/04-007, section 5.1. */
963 if (sym
->attr
.allocatable
== 1)
965 gfc_error ("Variable '%s' at %L cannot have the "
966 "ALLOCATABLE attribute because procedure '%s'"
967 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
968 sym
->ns
->proc_name
->name
);
972 if (sym
->attr
.pointer
== 1)
974 gfc_error ("Variable '%s' at %L cannot have the "
975 "POINTER attribute because procedure '%s'"
976 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
977 sym
->ns
->proc_name
->name
);
981 if (sym
->attr
.optional
== 1)
983 gfc_error ("Variable '%s' at %L cannot have the "
984 "OPTIONAL attribute because procedure '%s'"
985 " is BIND(C)", sym
->name
, &(sym
->declared_at
),
986 sym
->ns
->proc_name
->name
);
990 /* Make sure that if it has the dimension attribute, that it is
991 either assumed size or explicit shape. */
994 if (sym
->as
->type
== AS_ASSUMED_SHAPE
)
996 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
997 "argument to the procedure '%s' at %L because "
998 "the procedure is BIND(C)", sym
->name
,
999 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1000 &(sym
->ns
->proc_name
->declared_at
));
1004 if (sym
->as
->type
== AS_DEFERRED
)
1006 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1007 "argument to the procedure '%s' at %L because "
1008 "the procedure is BIND(C)", sym
->name
,
1009 &(sym
->declared_at
), sym
->ns
->proc_name
->name
,
1010 &(sym
->ns
->proc_name
->declared_at
));
1021 /* Function called by variable_decl() that adds a name to the symbol table. */
1024 build_sym (const char *name
, gfc_charlen
*cl
,
1025 gfc_array_spec
**as
, locus
*var_locus
)
1027 symbol_attribute attr
;
1030 if (gfc_get_symbol (name
, NULL
, &sym
))
1033 /* Start updating the symbol table. Add basic type attribute if present. */
1034 if (current_ts
.type
!= BT_UNKNOWN
1035 && (sym
->attr
.implicit_type
== 0
1036 || !gfc_compare_types (&sym
->ts
, ¤t_ts
))
1037 && gfc_add_type (sym
, ¤t_ts
, var_locus
) == FAILURE
)
1040 if (sym
->ts
.type
== BT_CHARACTER
)
1043 /* Add dimension attribute if present. */
1044 if (gfc_set_array_spec (sym
, *as
, var_locus
) == FAILURE
)
1048 /* Add attribute to symbol. The copy is so that we can reset the
1049 dimension attribute. */
1050 attr
= current_attr
;
1053 if (gfc_copy_attr (&sym
->attr
, &attr
, var_locus
) == FAILURE
)
1056 /* Finish any work that may need to be done for the binding label,
1057 if it's a bind(c). The bind(c) attr is found before the symbol
1058 is made, and before the symbol name (for data decls), so the
1059 current_ts is holding the binding label, or nothing if the
1060 name= attr wasn't given. Therefore, test here if we're dealing
1061 with a bind(c) and make sure the binding label is set correctly. */
1062 if (sym
->attr
.is_bind_c
== 1)
1064 if (sym
->binding_label
[0] == '\0')
1066 /* Set the binding label and verify that if a NAME= was specified
1067 then only one identifier was in the entity-decl-list. */
1068 if (set_binding_label (sym
->binding_label
, sym
->name
,
1069 num_idents_on_line
) == FAILURE
)
1074 /* See if we know we're in a common block, and if it's a bind(c)
1075 common then we need to make sure we're an interoperable type. */
1076 if (sym
->attr
.in_common
== 1)
1078 /* Test the common block object. */
1079 if (sym
->common_block
!= NULL
&& sym
->common_block
->is_bind_c
== 1
1080 && sym
->ts
.is_c_interop
!= 1)
1082 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1083 "must be declared with a C interoperable "
1084 "kind since common block '%s' is BIND(C)",
1085 sym
->name
, sym
->common_block
->name
,
1086 sym
->common_block
->name
);
1091 sym
->attr
.implied_index
= 0;
1097 /* Set character constant to the given length. The constant will be padded or
1098 truncated. If we're inside an array constructor without a typespec, we
1099 additionally check that all elements have the same length; check_len -1
1100 means no checking. */
1103 gfc_set_constant_character_len (int len
, gfc_expr
*expr
, int check_len
)
1108 gcc_assert (expr
->expr_type
== EXPR_CONSTANT
);
1109 gcc_assert (expr
->ts
.type
== BT_CHARACTER
);
1111 slen
= expr
->value
.character
.length
;
1114 s
= gfc_get_wide_string (len
+ 1);
1115 memcpy (s
, expr
->value
.character
.string
,
1116 MIN (len
, slen
) * sizeof (gfc_char_t
));
1118 gfc_wide_memset (&s
[slen
], ' ', len
- slen
);
1120 if (gfc_option
.warn_character_truncation
&& slen
> len
)
1121 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1122 "(%d/%d)", &expr
->where
, slen
, len
);
1124 /* Apply the standard by 'hand' otherwise it gets cleared for
1126 if (check_len
!= -1 && slen
!= check_len
1127 && !(gfc_option
.allow_std
& GFC_STD_GNU
))
1128 gfc_error_now ("The CHARACTER elements of the array constructor "
1129 "at %L must have the same length (%d/%d)",
1130 &expr
->where
, slen
, check_len
);
1133 gfc_free (expr
->value
.character
.string
);
1134 expr
->value
.character
.string
= s
;
1135 expr
->value
.character
.length
= len
;
1140 /* Function to create and update the enumerator history
1141 using the information passed as arguments.
1142 Pointer "max_enum" is also updated, to point to
1143 enum history node containing largest initializer.
1145 SYM points to the symbol node of enumerator.
1146 INIT points to its enumerator value. */
1149 create_enum_history (gfc_symbol
*sym
, gfc_expr
*init
)
1151 enumerator_history
*new_enum_history
;
1152 gcc_assert (sym
!= NULL
&& init
!= NULL
);
1154 new_enum_history
= XCNEW (enumerator_history
);
1156 new_enum_history
->sym
= sym
;
1157 new_enum_history
->initializer
= init
;
1158 new_enum_history
->next
= NULL
;
1160 if (enum_history
== NULL
)
1162 enum_history
= new_enum_history
;
1163 max_enum
= enum_history
;
1167 new_enum_history
->next
= enum_history
;
1168 enum_history
= new_enum_history
;
1170 if (mpz_cmp (max_enum
->initializer
->value
.integer
,
1171 new_enum_history
->initializer
->value
.integer
) < 0)
1172 max_enum
= new_enum_history
;
1177 /* Function to free enum kind history. */
1180 gfc_free_enum_history (void)
1182 enumerator_history
*current
= enum_history
;
1183 enumerator_history
*next
;
1185 while (current
!= NULL
)
1187 next
= current
->next
;
1192 enum_history
= NULL
;
1196 /* Function called by variable_decl() that adds an initialization
1197 expression to a symbol. */
1200 add_init_expr_to_sym (const char *name
, gfc_expr
**initp
, locus
*var_locus
)
1202 symbol_attribute attr
;
1207 if (find_special (name
, &sym
))
1212 /* If this symbol is confirming an implicit parameter type,
1213 then an initialization expression is not allowed. */
1214 if (attr
.flavor
== FL_PARAMETER
1215 && sym
->value
!= NULL
1218 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1225 /* An initializer is required for PARAMETER declarations. */
1226 if (attr
.flavor
== FL_PARAMETER
)
1228 gfc_error ("PARAMETER at %L is missing an initializer", var_locus
);
1234 /* If a variable appears in a DATA block, it cannot have an
1238 gfc_error ("Variable '%s' at %C with an initializer already "
1239 "appears in a DATA statement", sym
->name
);
1243 /* Check if the assignment can happen. This has to be put off
1244 until later for a derived type variable. */
1245 if (sym
->ts
.type
!= BT_DERIVED
&& init
->ts
.type
!= BT_DERIVED
1246 && gfc_check_assign_symbol (sym
, init
) == FAILURE
)
1249 if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.cl
)
1251 /* Update symbol character length according initializer. */
1252 if (sym
->ts
.cl
->length
== NULL
)
1255 /* If there are multiple CHARACTER variables declared on the
1256 same line, we don't want them to share the same length. */
1257 sym
->ts
.cl
= gfc_get_charlen ();
1258 sym
->ts
.cl
->next
= gfc_current_ns
->cl_list
;
1259 gfc_current_ns
->cl_list
= sym
->ts
.cl
;
1261 if (sym
->attr
.flavor
== FL_PARAMETER
)
1263 if (init
->expr_type
== EXPR_CONSTANT
)
1265 clen
= init
->value
.character
.length
;
1266 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
1268 else if (init
->expr_type
== EXPR_ARRAY
)
1270 gfc_expr
*p
= init
->value
.constructor
->expr
;
1271 clen
= p
->value
.character
.length
;
1272 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
1274 else if (init
->ts
.cl
&& init
->ts
.cl
->length
)
1275 sym
->ts
.cl
->length
=
1276 gfc_copy_expr (sym
->value
->ts
.cl
->length
);
1279 /* Update initializer character length according symbol. */
1280 else if (sym
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1282 int len
= mpz_get_si (sym
->ts
.cl
->length
->value
.integer
);
1283 gfc_constructor
* p
;
1285 if (init
->expr_type
== EXPR_CONSTANT
)
1286 gfc_set_constant_character_len (len
, init
, -1);
1287 else if (init
->expr_type
== EXPR_ARRAY
)
1289 /* Build a new charlen to prevent simplification from
1290 deleting the length before it is resolved. */
1291 init
->ts
.cl
= gfc_get_charlen ();
1292 init
->ts
.cl
->next
= gfc_current_ns
->cl_list
;
1293 gfc_current_ns
->cl_list
= sym
->ts
.cl
;
1294 init
->ts
.cl
->length
= gfc_copy_expr (sym
->ts
.cl
->length
);
1296 for (p
= init
->value
.constructor
; p
; p
= p
->next
)
1297 gfc_set_constant_character_len (len
, p
->expr
, -1);
1302 /* Need to check if the expression we initialized this
1303 to was one of the iso_c_binding named constants. If so,
1304 and we're a parameter (constant), let it be iso_c.
1306 integer(c_int), parameter :: my_int = c_int
1307 integer(my_int) :: my_int_2
1308 If we mark my_int as iso_c (since we can see it's value
1309 is equal to one of the named constants), then my_int_2
1310 will be considered C interoperable. */
1311 if (sym
->ts
.type
!= BT_CHARACTER
&& sym
->ts
.type
!= BT_DERIVED
)
1313 sym
->ts
.is_iso_c
|= init
->ts
.is_iso_c
;
1314 sym
->ts
.is_c_interop
|= init
->ts
.is_c_interop
;
1315 /* attr bits needed for module files. */
1316 sym
->attr
.is_iso_c
|= init
->ts
.is_iso_c
;
1317 sym
->attr
.is_c_interop
|= init
->ts
.is_c_interop
;
1318 if (init
->ts
.is_iso_c
)
1319 sym
->ts
.f90_type
= init
->ts
.f90_type
;
1322 /* Add initializer. Make sure we keep the ranks sane. */
1323 if (sym
->attr
.dimension
&& init
->rank
== 0)
1329 if (sym
->attr
.flavor
== FL_PARAMETER
1330 && init
->expr_type
== EXPR_CONSTANT
1331 && spec_size (sym
->as
, &size
) == SUCCESS
1332 && mpz_cmp_si (size
, 0) > 0)
1334 array
= gfc_start_constructor (init
->ts
.type
, init
->ts
.kind
,
1337 array
->value
.constructor
= c
= NULL
;
1338 for (n
= 0; n
< (int)mpz_get_si (size
); n
++)
1340 if (array
->value
.constructor
== NULL
)
1342 array
->value
.constructor
= c
= gfc_get_constructor ();
1347 c
->next
= gfc_get_constructor ();
1349 c
->expr
= gfc_copy_expr (init
);
1353 array
->shape
= gfc_get_shape (sym
->as
->rank
);
1354 for (n
= 0; n
< sym
->as
->rank
; n
++)
1355 spec_dimen_size (sym
->as
, n
, &array
->shape
[n
]);
1360 init
->rank
= sym
->as
->rank
;
1364 if (sym
->attr
.save
== SAVE_NONE
)
1365 sym
->attr
.save
= SAVE_IMPLICIT
;
1373 /* Function called by variable_decl() that adds a name to a structure
1377 build_struct (const char *name
, gfc_charlen
*cl
, gfc_expr
**init
,
1378 gfc_array_spec
**as
)
1382 /* If the current symbol is of the same derived type that we're
1383 constructing, it must have the pointer attribute. */
1384 if (current_ts
.type
== BT_DERIVED
1385 && current_ts
.derived
== gfc_current_block ()
1386 && current_attr
.pointer
== 0)
1388 gfc_error ("Component at %C must have the POINTER attribute");
1392 if (gfc_current_block ()->attr
.pointer
&& (*as
)->rank
!= 0)
1394 if ((*as
)->type
!= AS_DEFERRED
&& (*as
)->type
!= AS_EXPLICIT
)
1396 gfc_error ("Array component of structure at %C must have explicit "
1397 "or deferred shape");
1402 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
1407 c
->attr
= current_attr
;
1409 c
->initializer
= *init
;
1414 c
->attr
.dimension
= 1;
1417 /* Should this ever get more complicated, combine with similar section
1418 in add_init_expr_to_sym into a separate function. */
1419 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.pointer
&& c
->initializer
&& c
->ts
.cl
1420 && c
->ts
.cl
->length
&& c
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
)
1424 gcc_assert (c
->ts
.cl
&& c
->ts
.cl
->length
);
1425 gcc_assert (c
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
);
1426 gcc_assert (c
->ts
.cl
->length
->ts
.type
== BT_INTEGER
);
1428 len
= mpz_get_si (c
->ts
.cl
->length
->value
.integer
);
1430 if (c
->initializer
->expr_type
== EXPR_CONSTANT
)
1431 gfc_set_constant_character_len (len
, c
->initializer
, -1);
1432 else if (mpz_cmp (c
->ts
.cl
->length
->value
.integer
,
1433 c
->initializer
->ts
.cl
->length
->value
.integer
))
1436 gfc_constructor
*ctor
= c
->initializer
->value
.constructor
;
1441 has_ts
= (c
->initializer
->ts
.cl
1442 && c
->initializer
->ts
.cl
->length_from_typespec
);
1444 for (; ctor
; ctor
= ctor
->next
)
1446 /* Remember the length of the first element for checking that
1447 all elements *in the constructor* have the same length. This
1448 need not be the length of the LHS! */
1451 gcc_assert (ctor
->expr
->expr_type
== EXPR_CONSTANT
);
1452 gcc_assert (ctor
->expr
->ts
.type
== BT_CHARACTER
);
1453 first_len
= ctor
->expr
->value
.character
.length
;
1457 if (ctor
->expr
->expr_type
== EXPR_CONSTANT
)
1458 gfc_set_constant_character_len (len
, ctor
->expr
,
1459 has_ts
? -1 : first_len
);
1464 /* Check array components. */
1465 if (!c
->attr
.dimension
)
1467 if (c
->attr
.allocatable
)
1469 gfc_error ("Allocatable component at %C must be an array");
1476 if (c
->attr
.pointer
)
1478 if (c
->as
->type
!= AS_DEFERRED
)
1480 gfc_error ("Pointer array component of structure at %C must have a "
1485 else if (c
->attr
.allocatable
)
1487 if (c
->as
->type
!= AS_DEFERRED
)
1489 gfc_error ("Allocatable component of structure at %C must have a "
1496 if (c
->as
->type
!= AS_EXPLICIT
)
1498 gfc_error ("Array component of structure at %C must have an "
1508 /* Match a 'NULL()', and possibly take care of some side effects. */
1511 gfc_match_null (gfc_expr
**result
)
1517 m
= gfc_match (" null ( )");
1521 /* The NULL symbol now has to be/become an intrinsic function. */
1522 if (gfc_get_symbol ("null", NULL
, &sym
))
1524 gfc_error ("NULL() initialization at %C is ambiguous");
1528 gfc_intrinsic_symbol (sym
);
1530 if (sym
->attr
.proc
!= PROC_INTRINSIC
1531 && (gfc_add_procedure (&sym
->attr
, PROC_INTRINSIC
,
1532 sym
->name
, NULL
) == FAILURE
1533 || gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
))
1536 e
= gfc_get_expr ();
1537 e
->where
= gfc_current_locus
;
1538 e
->expr_type
= EXPR_NULL
;
1539 e
->ts
.type
= BT_UNKNOWN
;
1547 /* Match a variable name with an optional initializer. When this
1548 subroutine is called, a variable is expected to be parsed next.
1549 Depending on what is happening at the moment, updates either the
1550 symbol table or the current interface. */
1553 variable_decl (int elem
)
1555 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1556 gfc_expr
*initializer
, *char_len
;
1558 gfc_array_spec
*cp_as
; /* Extra copy for Cray Pointees. */
1569 old_locus
= gfc_current_locus
;
1571 /* When we get here, we've just matched a list of attributes and
1572 maybe a type and a double colon. The next thing we expect to see
1573 is the name of the symbol. */
1574 m
= gfc_match_name (name
);
1578 var_locus
= gfc_current_locus
;
1580 /* Now we could see the optional array spec. or character length. */
1581 m
= gfc_match_array_spec (&as
);
1582 if (gfc_option
.flag_cray_pointer
&& m
== MATCH_YES
)
1583 cp_as
= gfc_copy_array_spec (as
);
1584 else if (m
== MATCH_ERROR
)
1588 as
= gfc_copy_array_spec (current_as
);
1593 if (current_ts
.type
== BT_CHARACTER
)
1595 switch (match_char_length (&char_len
))
1598 cl
= gfc_get_charlen ();
1599 cl
->next
= gfc_current_ns
->cl_list
;
1600 gfc_current_ns
->cl_list
= cl
;
1602 cl
->length
= char_len
;
1605 /* Non-constant lengths need to be copied after the first
1606 element. Also copy assumed lengths. */
1609 && (current_ts
.cl
->length
== NULL
1610 || current_ts
.cl
->length
->expr_type
!= EXPR_CONSTANT
))
1612 cl
= gfc_get_charlen ();
1613 cl
->next
= gfc_current_ns
->cl_list
;
1614 gfc_current_ns
->cl_list
= cl
;
1615 cl
->length
= gfc_copy_expr (current_ts
.cl
->length
);
1627 /* If this symbol has already shown up in a Cray Pointer declaration,
1628 then we want to set the type & bail out. */
1629 if (gfc_option
.flag_cray_pointer
)
1631 gfc_find_symbol (name
, gfc_current_ns
, 1, &sym
);
1632 if (sym
!= NULL
&& sym
->attr
.cray_pointee
)
1634 sym
->ts
.type
= current_ts
.type
;
1635 sym
->ts
.kind
= current_ts
.kind
;
1637 sym
->ts
.derived
= current_ts
.derived
;
1638 sym
->ts
.is_c_interop
= current_ts
.is_c_interop
;
1639 sym
->ts
.is_iso_c
= current_ts
.is_iso_c
;
1642 /* Check to see if we have an array specification. */
1645 if (sym
->as
!= NULL
)
1647 gfc_error ("Duplicate array spec for Cray pointee at %C");
1648 gfc_free_array_spec (cp_as
);
1654 if (gfc_set_array_spec (sym
, cp_as
, &var_locus
) == FAILURE
)
1655 gfc_internal_error ("Couldn't set pointee array spec.");
1657 /* Fix the array spec. */
1658 m
= gfc_mod_pointee_as (sym
->as
);
1659 if (m
== MATCH_ERROR
)
1667 gfc_free_array_spec (cp_as
);
1671 /* Procedure pointer as function result. */
1672 if (gfc_current_state () == COMP_FUNCTION
1673 && strcmp ("ppr@", gfc_current_block ()->name
) == 0
1674 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) == 0)
1675 strcpy (name
, "ppr@");
1677 if (gfc_current_state () == COMP_FUNCTION
1678 && strcmp (name
, gfc_current_block ()->name
) == 0
1679 && gfc_current_block ()->result
1680 && strcmp ("ppr@", gfc_current_block ()->result
->name
) == 0)
1681 strcpy (name
, "ppr@");
1683 /* OK, we've successfully matched the declaration. Now put the
1684 symbol in the current namespace, because it might be used in the
1685 optional initialization expression for this symbol, e.g. this is
1688 integer, parameter :: i = huge(i)
1690 This is only true for parameters or variables of a basic type.
1691 For components of derived types, it is not true, so we don't
1692 create a symbol for those yet. If we fail to create the symbol,
1694 if (gfc_current_state () != COMP_DERIVED
1695 && build_sym (name
, cl
, &as
, &var_locus
) == FAILURE
)
1701 /* An interface body specifies all of the procedure's
1702 characteristics and these shall be consistent with those
1703 specified in the procedure definition, except that the interface
1704 may specify a procedure that is not pure if the procedure is
1705 defined to be pure(12.3.2). */
1706 if (current_ts
.type
== BT_DERIVED
1707 && gfc_current_ns
->proc_name
1708 && gfc_current_ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
1709 && current_ts
.derived
->ns
!= gfc_current_ns
)
1712 st
= gfc_find_symtree (gfc_current_ns
->sym_root
, current_ts
.derived
->name
);
1713 if (!(current_ts
.derived
->attr
.imported
1715 && st
->n
.sym
== current_ts
.derived
)
1716 && !gfc_current_ns
->has_import_set
)
1718 gfc_error ("the type of '%s' at %C has not been declared within the "
1725 /* In functions that have a RESULT variable defined, the function
1726 name always refers to function calls. Therefore, the name is
1727 not allowed to appear in specification statements. */
1728 if (gfc_current_state () == COMP_FUNCTION
1729 && gfc_current_block () != NULL
1730 && gfc_current_block ()->result
!= NULL
1731 && gfc_current_block ()->result
!= gfc_current_block ()
1732 && strcmp (gfc_current_block ()->name
, name
) == 0)
1734 gfc_error ("Function name '%s' not allowed at %C", name
);
1739 /* We allow old-style initializations of the form
1740 integer i /2/, j(4) /3*3, 1/
1741 (if no colon has been seen). These are different from data
1742 statements in that initializers are only allowed to apply to the
1743 variable immediately preceding, i.e.
1745 is not allowed. Therefore we have to do some work manually, that
1746 could otherwise be left to the matchers for DATA statements. */
1748 if (!colon_seen
&& gfc_match (" /") == MATCH_YES
)
1750 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Old-style "
1751 "initialization at %C") == FAILURE
)
1754 return match_old_style_init (name
);
1757 /* The double colon must be present in order to have initializers.
1758 Otherwise the statement is ambiguous with an assignment statement. */
1761 if (gfc_match (" =>") == MATCH_YES
)
1763 if (!current_attr
.pointer
)
1765 gfc_error ("Initialization at %C isn't for a pointer variable");
1770 m
= gfc_match_null (&initializer
);
1773 gfc_error ("Pointer initialization requires a NULL() at %C");
1777 if (gfc_pure (NULL
))
1779 gfc_error ("Initialization of pointer at %C is not allowed in "
1780 "a PURE procedure");
1788 else if (gfc_match_char ('=') == MATCH_YES
)
1790 if (current_attr
.pointer
)
1792 gfc_error ("Pointer initialization at %C requires '=>', "
1798 m
= gfc_match_init_expr (&initializer
);
1801 gfc_error ("Expected an initialization expression at %C");
1805 if (current_attr
.flavor
!= FL_PARAMETER
&& gfc_pure (NULL
))
1807 gfc_error ("Initialization of variable at %C is not allowed in "
1808 "a PURE procedure");
1817 if (initializer
!= NULL
&& current_attr
.allocatable
1818 && gfc_current_state () == COMP_DERIVED
)
1820 gfc_error ("Initialization of allocatable component at %C is not "
1826 /* Add the initializer. Note that it is fine if initializer is
1827 NULL here, because we sometimes also need to check if a
1828 declaration *must* have an initialization expression. */
1829 if (gfc_current_state () != COMP_DERIVED
)
1830 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
1833 if (current_ts
.type
== BT_DERIVED
1834 && !current_attr
.pointer
&& !initializer
)
1835 initializer
= gfc_default_initializer (¤t_ts
);
1836 t
= build_struct (name
, cl
, &initializer
, &as
);
1839 m
= (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
1842 /* Free stuff up and return. */
1843 gfc_free_expr (initializer
);
1844 gfc_free_array_spec (as
);
1850 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1851 This assumes that the byte size is equal to the kind number for
1852 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1855 gfc_match_old_kind_spec (gfc_typespec
*ts
)
1860 if (gfc_match_char ('*') != MATCH_YES
)
1863 m
= gfc_match_small_literal_int (&ts
->kind
, NULL
);
1867 original_kind
= ts
->kind
;
1869 /* Massage the kind numbers for complex types. */
1870 if (ts
->type
== BT_COMPLEX
)
1874 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1875 gfc_basic_typename (ts
->type
), original_kind
);
1881 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
1883 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1884 gfc_basic_typename (ts
->type
), original_kind
);
1888 if (gfc_notify_std (GFC_STD_GNU
, "Nonstandard type declaration %s*%d at %C",
1889 gfc_basic_typename (ts
->type
), original_kind
) == FAILURE
)
1896 /* Match a kind specification. Since kinds are generally optional, we
1897 usually return MATCH_NO if something goes wrong. If a "kind="
1898 string is found, then we know we have an error. */
1901 gfc_match_kind_spec (gfc_typespec
*ts
, bool kind_expr_only
)
1913 where
= loc
= gfc_current_locus
;
1918 if (gfc_match_char ('(') == MATCH_NO
)
1921 /* Also gobbles optional text. */
1922 if (gfc_match (" kind = ") == MATCH_YES
)
1925 loc
= gfc_current_locus
;
1928 n
= gfc_match_init_expr (&e
);
1932 if (gfc_matching_function
)
1934 /* The function kind expression might include use associated or
1935 imported parameters and try again after the specification
1937 if (gfc_match_char (')') != MATCH_YES
)
1939 gfc_error ("Missing right parenthesis at %C");
1945 gfc_undo_symbols ();
1950 /* ....or else, the match is real. */
1952 gfc_error ("Expected initialization expression at %C");
1960 gfc_error ("Expected scalar initialization expression at %C");
1965 msg
= gfc_extract_int (e
, &ts
->kind
);
1974 /* Before throwing away the expression, let's see if we had a
1975 C interoperable kind (and store the fact). */
1976 if (e
->ts
.is_c_interop
== 1)
1978 /* Mark this as c interoperable if being declared with one
1979 of the named constants from iso_c_binding. */
1980 ts
->is_c_interop
= e
->ts
.is_iso_c
;
1981 ts
->f90_type
= e
->ts
.f90_type
;
1987 /* Ignore errors to this point, if we've gotten here. This means
1988 we ignore the m=MATCH_ERROR from above. */
1989 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) < 0)
1991 gfc_error ("Kind %d not supported for type %s at %C", ts
->kind
,
1992 gfc_basic_typename (ts
->type
));
1993 gfc_current_locus
= where
;
1997 /* Warn if, e.g., c_int is used for a REAL variable, but not
1998 if, e.g., c_double is used for COMPLEX as the standard
1999 explicitly says that the kind type parameter for complex and real
2000 variable is the same, i.e. c_float == c_float_complex. */
2001 if (ts
->f90_type
!= BT_UNKNOWN
&& ts
->f90_type
!= ts
->type
2002 && !((ts
->f90_type
== BT_REAL
&& ts
->type
== BT_COMPLEX
)
2003 || (ts
->f90_type
== BT_COMPLEX
&& ts
->type
== BT_REAL
)))
2004 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2005 "is %s", gfc_basic_typename (ts
->f90_type
), &where
,
2006 gfc_basic_typename (ts
->type
));
2008 gfc_gobble_whitespace ();
2009 if ((c
= gfc_next_ascii_char ()) != ')'
2010 && (ts
->type
!= BT_CHARACTER
|| c
!= ','))
2012 if (ts
->type
== BT_CHARACTER
)
2013 gfc_error ("Missing right parenthesis or comma at %C");
2015 gfc_error ("Missing right parenthesis at %C");
2019 /* All tests passed. */
2022 if(m
== MATCH_ERROR
)
2023 gfc_current_locus
= where
;
2025 /* Return what we know from the test(s). */
2030 gfc_current_locus
= where
;
2036 match_char_kind (int * kind
, int * is_iso_c
)
2045 where
= gfc_current_locus
;
2047 n
= gfc_match_init_expr (&e
);
2049 if (n
!= MATCH_YES
&& gfc_matching_function
)
2051 /* The expression might include use-associated or imported
2052 parameters and try again after the specification
2055 gfc_undo_symbols ();
2060 gfc_error ("Expected initialization expression at %C");
2066 gfc_error ("Expected scalar initialization expression at %C");
2071 msg
= gfc_extract_int (e
, kind
);
2072 *is_iso_c
= e
->ts
.is_iso_c
;
2082 /* Ignore errors to this point, if we've gotten here. This means
2083 we ignore the m=MATCH_ERROR from above. */
2084 if (gfc_validate_kind (BT_CHARACTER
, *kind
, true) < 0)
2086 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind
);
2090 /* All tests passed. */
2093 if (m
== MATCH_ERROR
)
2094 gfc_current_locus
= where
;
2096 /* Return what we know from the test(s). */
2101 gfc_current_locus
= where
;
2105 /* Match the various kind/length specifications in a CHARACTER
2106 declaration. We don't return MATCH_NO. */
2109 match_char_spec (gfc_typespec
*ts
)
2111 int kind
, seen_length
, is_iso_c
;
2121 /* Try the old-style specification first. */
2122 old_char_selector
= 0;
2124 m
= match_char_length (&len
);
2128 old_char_selector
= 1;
2133 m
= gfc_match_char ('(');
2136 m
= MATCH_YES
; /* Character without length is a single char. */
2140 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2141 if (gfc_match (" kind =") == MATCH_YES
)
2143 m
= match_char_kind (&kind
, &is_iso_c
);
2145 if (m
== MATCH_ERROR
)
2150 if (gfc_match (" , len =") == MATCH_NO
)
2153 m
= char_len_param_value (&len
);
2156 if (m
== MATCH_ERROR
)
2163 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2164 if (gfc_match (" len =") == MATCH_YES
)
2166 m
= char_len_param_value (&len
);
2169 if (m
== MATCH_ERROR
)
2173 if (gfc_match_char (')') == MATCH_YES
)
2176 if (gfc_match (" , kind =") != MATCH_YES
)
2179 if (match_char_kind (&kind
, &is_iso_c
) == MATCH_ERROR
)
2185 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2186 m
= char_len_param_value (&len
);
2189 if (m
== MATCH_ERROR
)
2193 m
= gfc_match_char (')');
2197 if (gfc_match_char (',') != MATCH_YES
)
2200 gfc_match (" kind ="); /* Gobble optional text. */
2202 m
= match_char_kind (&kind
, &is_iso_c
);
2203 if (m
== MATCH_ERROR
)
2209 /* Require a right-paren at this point. */
2210 m
= gfc_match_char (')');
2215 gfc_error ("Syntax error in CHARACTER declaration at %C");
2217 gfc_free_expr (len
);
2221 /* Deal with character functions after USE and IMPORT statements. */
2222 if (gfc_matching_function
)
2224 gfc_free_expr (len
);
2225 gfc_undo_symbols ();
2231 gfc_free_expr (len
);
2235 /* Do some final massaging of the length values. */
2236 cl
= gfc_get_charlen ();
2237 cl
->next
= gfc_current_ns
->cl_list
;
2238 gfc_current_ns
->cl_list
= cl
;
2240 if (seen_length
== 0)
2241 cl
->length
= gfc_int_expr (1);
2246 ts
->kind
= kind
== 0 ? gfc_default_character_kind
: kind
;
2248 /* We have to know if it was a c interoperable kind so we can
2249 do accurate type checking of bind(c) procs, etc. */
2251 /* Mark this as c interoperable if being declared with one
2252 of the named constants from iso_c_binding. */
2253 ts
->is_c_interop
= is_iso_c
;
2254 else if (len
!= NULL
)
2255 /* Here, we might have parsed something such as: character(c_char)
2256 In this case, the parsing code above grabs the c_char when
2257 looking for the length (line 1690, roughly). it's the last
2258 testcase for parsing the kind params of a character variable.
2259 However, it's not actually the length. this seems like it
2261 To see if the user used a C interop kind, test the expr
2262 of the so called length, and see if it's C interoperable. */
2263 ts
->is_c_interop
= len
->ts
.is_iso_c
;
2269 /* Matches a type specification. If successful, sets the ts structure
2270 to the matched specification. This is necessary for FUNCTION and
2271 IMPLICIT statements.
2273 If implicit_flag is nonzero, then we don't check for the optional
2274 kind specification. Not doing so is needed for matching an IMPLICIT
2275 statement correctly. */
2278 gfc_match_type_spec (gfc_typespec
*ts
, int implicit_flag
)
2280 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2284 bool seen_deferred_kind
;
2286 /* A belt and braces check that the typespec is correctly being treated
2287 as a deferred characteristic association. */
2288 seen_deferred_kind
= (gfc_current_state () == COMP_FUNCTION
)
2289 && (gfc_current_block ()->result
->ts
.kind
== -1)
2290 && (ts
->kind
== -1);
2292 if (seen_deferred_kind
)
2295 /* Clear the current binding label, in case one is given. */
2296 curr_binding_label
[0] = '\0';
2298 if (gfc_match (" byte") == MATCH_YES
)
2300 if (gfc_notify_std(GFC_STD_GNU
, "Extension: BYTE type at %C")
2304 if (gfc_validate_kind (BT_INTEGER
, 1, true) < 0)
2306 gfc_error ("BYTE type used at %C "
2307 "is not available on the target machine");
2311 ts
->type
= BT_INTEGER
;
2316 if (gfc_match (" integer") == MATCH_YES
)
2318 ts
->type
= BT_INTEGER
;
2319 ts
->kind
= gfc_default_integer_kind
;
2323 if (gfc_match (" character") == MATCH_YES
)
2325 ts
->type
= BT_CHARACTER
;
2326 if (implicit_flag
== 0)
2327 return match_char_spec (ts
);
2332 if (gfc_match (" real") == MATCH_YES
)
2335 ts
->kind
= gfc_default_real_kind
;
2339 if (gfc_match (" double precision") == MATCH_YES
)
2342 ts
->kind
= gfc_default_double_kind
;
2346 if (gfc_match (" complex") == MATCH_YES
)
2348 ts
->type
= BT_COMPLEX
;
2349 ts
->kind
= gfc_default_complex_kind
;
2353 if (gfc_match (" double complex") == MATCH_YES
)
2355 if (gfc_notify_std (GFC_STD_GNU
, "DOUBLE COMPLEX at %C does not "
2356 "conform to the Fortran 95 standard") == FAILURE
)
2359 ts
->type
= BT_COMPLEX
;
2360 ts
->kind
= gfc_default_double_kind
;
2364 if (gfc_match (" logical") == MATCH_YES
)
2366 ts
->type
= BT_LOGICAL
;
2367 ts
->kind
= gfc_default_logical_kind
;
2371 m
= gfc_match (" type ( %n )", name
);
2375 ts
->type
= BT_DERIVED
;
2377 /* Defer association of the derived type until the end of the
2378 specification block. However, if the derived type can be
2379 found, add it to the typespec. */
2380 if (gfc_matching_function
)
2383 if (gfc_current_state () != COMP_INTERFACE
2384 && !gfc_find_symbol (name
, NULL
, 1, &sym
) && sym
)
2389 /* Search for the name but allow the components to be defined later. If
2390 type = -1, this typespec has been seen in a function declaration but
2391 the type could not be accessed at that point. */
2393 if (ts
->kind
!= -1 && gfc_get_ha_symbol (name
, &sym
))
2395 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2398 else if (ts
->kind
== -1)
2400 int iface
= gfc_state_stack
->previous
->state
!= COMP_INTERFACE
2401 || gfc_current_ns
->has_import_set
;
2402 if (gfc_find_symbol (name
, NULL
, iface
, &sym
))
2404 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2413 if (sym
->attr
.flavor
!= FL_DERIVED
2414 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
2417 gfc_set_sym_referenced (sym
);
2423 /* For all types except double, derived and character, look for an
2424 optional kind specifier. MATCH_NO is actually OK at this point. */
2425 if (implicit_flag
== 1)
2428 if (gfc_current_form
== FORM_FREE
)
2430 c
= gfc_peek_ascii_char();
2431 if (!gfc_is_whitespace(c
) && c
!= '*' && c
!= '('
2432 && c
!= ':' && c
!= ',')
2436 m
= gfc_match_kind_spec (ts
, false);
2437 if (m
== MATCH_NO
&& ts
->type
!= BT_CHARACTER
)
2438 m
= gfc_match_old_kind_spec (ts
);
2440 /* Defer association of the KIND expression of function results
2441 until after USE and IMPORT statements. */
2442 if ((gfc_current_state () == COMP_NONE
&& gfc_error_flag_test ())
2443 || gfc_matching_function
)
2447 m
= MATCH_YES
; /* No kind specifier found. */
2453 /* Match an IMPLICIT NONE statement. Actually, this statement is
2454 already matched in parse.c, or we would not end up here in the
2455 first place. So the only thing we need to check, is if there is
2456 trailing garbage. If not, the match is successful. */
2459 gfc_match_implicit_none (void)
2461 return (gfc_match_eos () == MATCH_YES
) ? MATCH_YES
: MATCH_NO
;
2465 /* Match the letter range(s) of an IMPLICIT statement. */
2468 match_implicit_range (void)
2474 cur_loc
= gfc_current_locus
;
2476 gfc_gobble_whitespace ();
2477 c
= gfc_next_ascii_char ();
2480 gfc_error ("Missing character range in IMPLICIT at %C");
2487 gfc_gobble_whitespace ();
2488 c1
= gfc_next_ascii_char ();
2492 gfc_gobble_whitespace ();
2493 c
= gfc_next_ascii_char ();
2498 inner
= 0; /* Fall through. */
2505 gfc_gobble_whitespace ();
2506 c2
= gfc_next_ascii_char ();
2510 gfc_gobble_whitespace ();
2511 c
= gfc_next_ascii_char ();
2513 if ((c
!= ',') && (c
!= ')'))
2526 gfc_error ("Letters must be in alphabetic order in "
2527 "IMPLICIT statement at %C");
2531 /* See if we can add the newly matched range to the pending
2532 implicits from this IMPLICIT statement. We do not check for
2533 conflicts with whatever earlier IMPLICIT statements may have
2534 set. This is done when we've successfully finished matching
2536 if (gfc_add_new_implicit_range (c1
, c2
) != SUCCESS
)
2543 gfc_syntax_error (ST_IMPLICIT
);
2545 gfc_current_locus
= cur_loc
;
2550 /* Match an IMPLICIT statement, storing the types for
2551 gfc_set_implicit() if the statement is accepted by the parser.
2552 There is a strange looking, but legal syntactic construction
2553 possible. It looks like:
2555 IMPLICIT INTEGER (a-b) (c-d)
2557 This is legal if "a-b" is a constant expression that happens to
2558 equal one of the legal kinds for integers. The real problem
2559 happens with an implicit specification that looks like:
2561 IMPLICIT INTEGER (a-b)
2563 In this case, a typespec matcher that is "greedy" (as most of the
2564 matchers are) gobbles the character range as a kindspec, leaving
2565 nothing left. We therefore have to go a bit more slowly in the
2566 matching process by inhibiting the kindspec checking during
2567 typespec matching and checking for a kind later. */
2570 gfc_match_implicit (void)
2579 /* We don't allow empty implicit statements. */
2580 if (gfc_match_eos () == MATCH_YES
)
2582 gfc_error ("Empty IMPLICIT statement at %C");
2588 /* First cleanup. */
2589 gfc_clear_new_implicit ();
2591 /* A basic type is mandatory here. */
2592 m
= gfc_match_type_spec (&ts
, 1);
2593 if (m
== MATCH_ERROR
)
2598 cur_loc
= gfc_current_locus
;
2599 m
= match_implicit_range ();
2603 /* We may have <TYPE> (<RANGE>). */
2604 gfc_gobble_whitespace ();
2605 c
= gfc_next_ascii_char ();
2606 if ((c
== '\n') || (c
== ','))
2608 /* Check for CHARACTER with no length parameter. */
2609 if (ts
.type
== BT_CHARACTER
&& !ts
.cl
)
2611 ts
.kind
= gfc_default_character_kind
;
2612 ts
.cl
= gfc_get_charlen ();
2613 ts
.cl
->next
= gfc_current_ns
->cl_list
;
2614 gfc_current_ns
->cl_list
= ts
.cl
;
2615 ts
.cl
->length
= gfc_int_expr (1);
2618 /* Record the Successful match. */
2619 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2624 gfc_current_locus
= cur_loc
;
2627 /* Discard the (incorrectly) matched range. */
2628 gfc_clear_new_implicit ();
2630 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2631 if (ts
.type
== BT_CHARACTER
)
2632 m
= match_char_spec (&ts
);
2635 m
= gfc_match_kind_spec (&ts
, false);
2638 m
= gfc_match_old_kind_spec (&ts
);
2639 if (m
== MATCH_ERROR
)
2645 if (m
== MATCH_ERROR
)
2648 m
= match_implicit_range ();
2649 if (m
== MATCH_ERROR
)
2654 gfc_gobble_whitespace ();
2655 c
= gfc_next_ascii_char ();
2656 if ((c
!= '\n') && (c
!= ','))
2659 if (gfc_merge_new_implicit (&ts
) != SUCCESS
)
2667 gfc_syntax_error (ST_IMPLICIT
);
2675 gfc_match_import (void)
2677 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2682 if (gfc_current_ns
->proc_name
== NULL
2683 || gfc_current_ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
2685 gfc_error ("IMPORT statement at %C only permitted in "
2686 "an INTERFACE body");
2690 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IMPORT statement at %C")
2694 if (gfc_match_eos () == MATCH_YES
)
2696 /* All host variables should be imported. */
2697 gfc_current_ns
->has_import_set
= 1;
2701 if (gfc_match (" ::") == MATCH_YES
)
2703 if (gfc_match_eos () == MATCH_YES
)
2705 gfc_error ("Expecting list of named entities at %C");
2712 m
= gfc_match (" %n", name
);
2716 if (gfc_current_ns
->parent
!= NULL
2717 && gfc_find_symbol (name
, gfc_current_ns
->parent
, 1, &sym
))
2719 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2722 else if (gfc_current_ns
->proc_name
->ns
->parent
!= NULL
2723 && gfc_find_symbol (name
,
2724 gfc_current_ns
->proc_name
->ns
->parent
,
2727 gfc_error ("Type name '%s' at %C is ambiguous", name
);
2733 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2734 "at %C - does not exist.", name
);
2738 if (gfc_find_symtree (gfc_current_ns
->sym_root
,name
))
2740 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2745 st
= gfc_new_symtree (&gfc_current_ns
->sym_root
, sym
->name
);
2748 sym
->attr
.imported
= 1;
2760 if (gfc_match_eos () == MATCH_YES
)
2762 if (gfc_match_char (',') != MATCH_YES
)
2769 gfc_error ("Syntax error in IMPORT statement at %C");
2774 /* A minimal implementation of gfc_match without whitespace, escape
2775 characters or variable arguments. Returns true if the next
2776 characters match the TARGET template exactly. */
2779 match_string_p (const char *target
)
2783 for (p
= target
; *p
; p
++)
2784 if ((char) gfc_next_ascii_char () != *p
)
2789 /* Matches an attribute specification including array specs. If
2790 successful, leaves the variables current_attr and current_as
2791 holding the specification. Also sets the colon_seen variable for
2792 later use by matchers associated with initializations.
2794 This subroutine is a little tricky in the sense that we don't know
2795 if we really have an attr-spec until we hit the double colon.
2796 Until that time, we can only return MATCH_NO. This forces us to
2797 check for duplicate specification at this level. */
2800 match_attr_spec (void)
2802 /* Modifiers that can exist in a type statement. */
2804 { GFC_DECL_BEGIN
= 0,
2805 DECL_ALLOCATABLE
= GFC_DECL_BEGIN
, DECL_DIMENSION
, DECL_EXTERNAL
,
2806 DECL_IN
, DECL_OUT
, DECL_INOUT
, DECL_INTRINSIC
, DECL_OPTIONAL
,
2807 DECL_PARAMETER
, DECL_POINTER
, DECL_PROTECTED
, DECL_PRIVATE
,
2808 DECL_PUBLIC
, DECL_SAVE
, DECL_TARGET
, DECL_VALUE
, DECL_VOLATILE
,
2809 DECL_IS_BIND_C
, DECL_NONE
,
2810 GFC_DECL_END
/* Sentinel */
2814 /* GFC_DECL_END is the sentinel, index starts at 0. */
2815 #define NUM_DECL GFC_DECL_END
2817 locus start
, seen_at
[NUM_DECL
];
2824 gfc_clear_attr (¤t_attr
);
2825 start
= gfc_current_locus
;
2830 /* See if we get all of the keywords up to the final double colon. */
2831 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
2839 gfc_gobble_whitespace ();
2841 ch
= gfc_next_ascii_char ();
2844 /* This is the successful exit condition for the loop. */
2845 if (gfc_next_ascii_char () == ':')
2850 gfc_gobble_whitespace ();
2851 switch (gfc_peek_ascii_char ())
2854 if (match_string_p ("allocatable"))
2855 d
= DECL_ALLOCATABLE
;
2859 /* Try and match the bind(c). */
2860 m
= gfc_match_bind_c (NULL
, true);
2863 else if (m
== MATCH_ERROR
)
2868 if (match_string_p ("dimension"))
2873 if (match_string_p ("external"))
2878 if (match_string_p ("int"))
2880 ch
= gfc_next_ascii_char ();
2883 if (match_string_p ("nt"))
2885 /* Matched "intent". */
2886 /* TODO: Call match_intent_spec from here. */
2887 if (gfc_match (" ( in out )") == MATCH_YES
)
2889 else if (gfc_match (" ( in )") == MATCH_YES
)
2891 else if (gfc_match (" ( out )") == MATCH_YES
)
2897 if (match_string_p ("insic"))
2899 /* Matched "intrinsic". */
2907 if (match_string_p ("optional"))
2912 gfc_next_ascii_char ();
2913 switch (gfc_next_ascii_char ())
2916 if (match_string_p ("rameter"))
2918 /* Matched "parameter". */
2924 if (match_string_p ("inter"))
2926 /* Matched "pointer". */
2932 ch
= gfc_next_ascii_char ();
2935 if (match_string_p ("vate"))
2937 /* Matched "private". */
2943 if (match_string_p ("tected"))
2945 /* Matched "protected". */
2952 if (match_string_p ("blic"))
2954 /* Matched "public". */
2962 if (match_string_p ("save"))
2967 if (match_string_p ("target"))
2972 gfc_next_ascii_char ();
2973 ch
= gfc_next_ascii_char ();
2976 if (match_string_p ("lue"))
2978 /* Matched "value". */
2984 if (match_string_p ("latile"))
2986 /* Matched "volatile". */
2994 /* No double colon and no recognizable decl_type, so assume that
2995 we've been looking at something else the whole time. */
3002 /* Check to make sure any parens are paired up correctly. */
3003 if (gfc_match_parens () == MATCH_ERROR
)
3010 seen_at
[d
] = gfc_current_locus
;
3012 if (d
== DECL_DIMENSION
)
3014 m
= gfc_match_array_spec (¤t_as
);
3018 gfc_error ("Missing dimension specification at %C");
3022 if (m
== MATCH_ERROR
)
3027 /* Since we've seen a double colon, we have to be looking at an
3028 attr-spec. This means that we can now issue errors. */
3029 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3034 case DECL_ALLOCATABLE
:
3035 attr
= "ALLOCATABLE";
3037 case DECL_DIMENSION
:
3044 attr
= "INTENT (IN)";
3047 attr
= "INTENT (OUT)";
3050 attr
= "INTENT (IN OUT)";
3052 case DECL_INTRINSIC
:
3058 case DECL_PARAMETER
:
3064 case DECL_PROTECTED
:
3079 case DECL_IS_BIND_C
:
3089 attr
= NULL
; /* This shouldn't happen. */
3092 gfc_error ("Duplicate %s attribute at %L", attr
, &seen_at
[d
]);
3097 /* Now that we've dealt with duplicate attributes, add the attributes
3098 to the current attribute. */
3099 for (d
= GFC_DECL_BEGIN
; d
!= GFC_DECL_END
; d
++)
3104 if (gfc_current_state () == COMP_DERIVED
3105 && d
!= DECL_DIMENSION
&& d
!= DECL_POINTER
3106 && d
!= DECL_PRIVATE
&& d
!= DECL_PUBLIC
3109 if (d
== DECL_ALLOCATABLE
)
3111 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ALLOCATABLE "
3112 "attribute at %C in a TYPE definition")
3121 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3128 if ((d
== DECL_PRIVATE
|| d
== DECL_PUBLIC
)
3129 && gfc_current_state () != COMP_MODULE
)
3131 if (d
== DECL_PRIVATE
)
3135 if (gfc_current_state () == COMP_DERIVED
3136 && gfc_state_stack
->previous
3137 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
3139 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: Attribute %s "
3140 "at %L in a TYPE definition", attr
,
3150 gfc_error ("%s attribute at %L is not allowed outside of the "
3151 "specification part of a module", attr
, &seen_at
[d
]);
3159 case DECL_ALLOCATABLE
:
3160 t
= gfc_add_allocatable (¤t_attr
, &seen_at
[d
]);
3163 case DECL_DIMENSION
:
3164 t
= gfc_add_dimension (¤t_attr
, NULL
, &seen_at
[d
]);
3168 t
= gfc_add_external (¤t_attr
, &seen_at
[d
]);
3172 t
= gfc_add_intent (¤t_attr
, INTENT_IN
, &seen_at
[d
]);
3176 t
= gfc_add_intent (¤t_attr
, INTENT_OUT
, &seen_at
[d
]);
3180 t
= gfc_add_intent (¤t_attr
, INTENT_INOUT
, &seen_at
[d
]);
3183 case DECL_INTRINSIC
:
3184 t
= gfc_add_intrinsic (¤t_attr
, &seen_at
[d
]);
3188 t
= gfc_add_optional (¤t_attr
, &seen_at
[d
]);
3191 case DECL_PARAMETER
:
3192 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, &seen_at
[d
]);
3196 t
= gfc_add_pointer (¤t_attr
, &seen_at
[d
]);
3199 case DECL_PROTECTED
:
3200 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
3202 gfc_error ("PROTECTED at %C only allowed in specification "
3203 "part of a module");
3208 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED "
3213 t
= gfc_add_protected (¤t_attr
, NULL
, &seen_at
[d
]);
3217 t
= gfc_add_access (¤t_attr
, ACCESS_PRIVATE
, NULL
,
3222 t
= gfc_add_access (¤t_attr
, ACCESS_PUBLIC
, NULL
,
3227 t
= gfc_add_save (¤t_attr
, NULL
, &seen_at
[d
]);
3231 t
= gfc_add_target (¤t_attr
, &seen_at
[d
]);
3234 case DECL_IS_BIND_C
:
3235 t
= gfc_add_is_bind_c(¤t_attr
, NULL
, &seen_at
[d
], 0);
3239 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE attribute "
3244 t
= gfc_add_value (¤t_attr
, NULL
, &seen_at
[d
]);
3248 if (gfc_notify_std (GFC_STD_F2003
,
3249 "Fortran 2003: VOLATILE attribute at %C")
3253 t
= gfc_add_volatile (¤t_attr
, NULL
, &seen_at
[d
]);
3257 gfc_internal_error ("match_attr_spec(): Bad attribute");
3271 gfc_current_locus
= start
;
3272 gfc_free_array_spec (current_as
);
3278 /* Set the binding label, dest_label, either with the binding label
3279 stored in the given gfc_typespec, ts, or if none was provided, it
3280 will be the symbol name in all lower case, as required by the draft
3281 (J3/04-007, section 15.4.1). If a binding label was given and
3282 there is more than one argument (num_idents), it is an error. */
3285 set_binding_label (char *dest_label
, const char *sym_name
, int num_idents
)
3287 if (num_idents
> 1 && has_name_equals
)
3289 gfc_error ("Multiple identifiers provided with "
3290 "single NAME= specifier at %C");
3294 if (curr_binding_label
[0] != '\0')
3296 /* Binding label given; store in temp holder til have sym. */
3297 strcpy (dest_label
, curr_binding_label
);
3301 /* No binding label given, and the NAME= specifier did not exist,
3302 which means there was no NAME="". */
3303 if (sym_name
!= NULL
&& has_name_equals
== 0)
3304 strcpy (dest_label
, sym_name
);
3311 /* Set the status of the given common block as being BIND(C) or not,
3312 depending on the given parameter, is_bind_c. */
3315 set_com_block_bind_c (gfc_common_head
*com_block
, int is_bind_c
)
3317 com_block
->is_bind_c
= is_bind_c
;
3322 /* Verify that the given gfc_typespec is for a C interoperable type. */
3325 verify_c_interop (gfc_typespec
*ts
)
3327 if (ts
->type
== BT_DERIVED
&& ts
->derived
!= NULL
)
3328 return (ts
->derived
->ts
.is_c_interop
? SUCCESS
: FAILURE
);
3329 else if (ts
->is_c_interop
!= 1)
3336 /* Verify that the variables of a given common block, which has been
3337 defined with the attribute specifier bind(c), to be of a C
3338 interoperable type. Errors will be reported here, if
3342 verify_com_block_vars_c_interop (gfc_common_head
*com_block
)
3344 gfc_symbol
*curr_sym
= NULL
;
3345 gfc_try retval
= SUCCESS
;
3347 curr_sym
= com_block
->head
;
3349 /* Make sure we have at least one symbol. */
3350 if (curr_sym
== NULL
)
3353 /* Here we know we have a symbol, so we'll execute this loop
3357 /* The second to last param, 1, says this is in a common block. */
3358 retval
= verify_bind_c_sym (curr_sym
, &(curr_sym
->ts
), 1, com_block
);
3359 curr_sym
= curr_sym
->common_next
;
3360 } while (curr_sym
!= NULL
);
3366 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3367 an appropriate error message is reported. */
3370 verify_bind_c_sym (gfc_symbol
*tmp_sym
, gfc_typespec
*ts
,
3371 int is_in_common
, gfc_common_head
*com_block
)
3373 bool bind_c_function
= false;
3374 gfc_try retval
= SUCCESS
;
3376 if (tmp_sym
->attr
.function
&& tmp_sym
->attr
.is_bind_c
)
3377 bind_c_function
= true;
3379 if (tmp_sym
->attr
.function
&& tmp_sym
->result
!= NULL
)
3381 tmp_sym
= tmp_sym
->result
;
3382 /* Make sure it wasn't an implicitly typed result. */
3383 if (tmp_sym
->attr
.implicit_type
)
3385 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3386 "%L may not be C interoperable", tmp_sym
->name
,
3387 &tmp_sym
->declared_at
);
3388 tmp_sym
->ts
.f90_type
= tmp_sym
->ts
.type
;
3389 /* Mark it as C interoperable to prevent duplicate warnings. */
3390 tmp_sym
->ts
.is_c_interop
= 1;
3391 tmp_sym
->attr
.is_c_interop
= 1;
3395 /* Here, we know we have the bind(c) attribute, so if we have
3396 enough type info, then verify that it's a C interop kind.
3397 The info could be in the symbol already, or possibly still in
3398 the given ts (current_ts), so look in both. */
3399 if (tmp_sym
->ts
.type
!= BT_UNKNOWN
|| ts
->type
!= BT_UNKNOWN
)
3401 if (verify_c_interop (&(tmp_sym
->ts
)) != SUCCESS
)
3403 /* See if we're dealing with a sym in a common block or not. */
3404 if (is_in_common
== 1)
3406 gfc_warning ("Variable '%s' in common block '%s' at %L "
3407 "may not be a C interoperable "
3408 "kind though common block '%s' is BIND(C)",
3409 tmp_sym
->name
, com_block
->name
,
3410 &(tmp_sym
->declared_at
), com_block
->name
);
3414 if (tmp_sym
->ts
.type
== BT_DERIVED
|| ts
->type
== BT_DERIVED
)
3415 gfc_error ("Type declaration '%s' at %L is not C "
3416 "interoperable but it is BIND(C)",
3417 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3419 gfc_warning ("Variable '%s' at %L "
3420 "may not be a C interoperable "
3421 "kind but it is bind(c)",
3422 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3426 /* Variables declared w/in a common block can't be bind(c)
3427 since there's no way for C to see these variables, so there's
3428 semantically no reason for the attribute. */
3429 if (is_in_common
== 1 && tmp_sym
->attr
.is_bind_c
== 1)
3431 gfc_error ("Variable '%s' in common block '%s' at "
3432 "%L cannot be declared with BIND(C) "
3433 "since it is not a global",
3434 tmp_sym
->name
, com_block
->name
,
3435 &(tmp_sym
->declared_at
));
3439 /* Scalar variables that are bind(c) can not have the pointer
3440 or allocatable attributes. */
3441 if (tmp_sym
->attr
.is_bind_c
== 1)
3443 if (tmp_sym
->attr
.pointer
== 1)
3445 gfc_error ("Variable '%s' at %L cannot have both the "
3446 "POINTER and BIND(C) attributes",
3447 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3451 if (tmp_sym
->attr
.allocatable
== 1)
3453 gfc_error ("Variable '%s' at %L cannot have both the "
3454 "ALLOCATABLE and BIND(C) attributes",
3455 tmp_sym
->name
, &(tmp_sym
->declared_at
));
3461 /* If it is a BIND(C) function, make sure the return value is a
3462 scalar value. The previous tests in this function made sure
3463 the type is interoperable. */
3464 if (bind_c_function
&& tmp_sym
->as
!= NULL
)
3465 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3466 "be an array", tmp_sym
->name
, &(tmp_sym
->declared_at
));
3468 /* BIND(C) functions can not return a character string. */
3469 if (bind_c_function
&& tmp_sym
->ts
.type
== BT_CHARACTER
)
3470 if (tmp_sym
->ts
.cl
== NULL
|| tmp_sym
->ts
.cl
->length
== NULL
3471 || tmp_sym
->ts
.cl
->length
->expr_type
!= EXPR_CONSTANT
3472 || mpz_cmp_si (tmp_sym
->ts
.cl
->length
->value
.integer
, 1) != 0)
3473 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3474 "be a character string", tmp_sym
->name
,
3475 &(tmp_sym
->declared_at
));
3478 /* See if the symbol has been marked as private. If it has, make sure
3479 there is no binding label and warn the user if there is one. */
3480 if (tmp_sym
->attr
.access
== ACCESS_PRIVATE
3481 && tmp_sym
->binding_label
[0] != '\0')
3482 /* Use gfc_warning_now because we won't say that the symbol fails
3483 just because of this. */
3484 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3485 "given the binding label '%s'", tmp_sym
->name
,
3486 &(tmp_sym
->declared_at
), tmp_sym
->binding_label
);
3492 /* Set the appropriate fields for a symbol that's been declared as
3493 BIND(C) (the is_bind_c flag and the binding label), and verify that
3494 the type is C interoperable. Errors are reported by the functions
3495 used to set/test these fields. */
3498 set_verify_bind_c_sym (gfc_symbol
*tmp_sym
, int num_idents
)
3500 gfc_try retval
= SUCCESS
;
3502 /* TODO: Do we need to make sure the vars aren't marked private? */
3504 /* Set the is_bind_c bit in symbol_attribute. */
3505 gfc_add_is_bind_c (&(tmp_sym
->attr
), tmp_sym
->name
, &gfc_current_locus
, 0);
3507 if (set_binding_label (tmp_sym
->binding_label
, tmp_sym
->name
,
3508 num_idents
) != SUCCESS
)
3515 /* Set the fields marking the given common block as BIND(C), including
3516 a binding label, and report any errors encountered. */
3519 set_verify_bind_c_com_block (gfc_common_head
*com_block
, int num_idents
)
3521 gfc_try retval
= SUCCESS
;
3523 /* destLabel, common name, typespec (which may have binding label). */
3524 if (set_binding_label (com_block
->binding_label
, com_block
->name
, num_idents
)
3528 /* Set the given common block (com_block) to being bind(c) (1). */
3529 set_com_block_bind_c (com_block
, 1);
3535 /* Retrieve the list of one or more identifiers that the given bind(c)
3536 attribute applies to. */
3539 get_bind_c_idents (void)
3541 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3543 gfc_symbol
*tmp_sym
= NULL
;
3545 gfc_common_head
*com_block
= NULL
;
3547 if (gfc_match_name (name
) == MATCH_YES
)
3549 found_id
= MATCH_YES
;
3550 gfc_get_ha_symbol (name
, &tmp_sym
);
3552 else if (match_common_name (name
) == MATCH_YES
)
3554 found_id
= MATCH_YES
;
3555 com_block
= gfc_get_common (name
, 0);
3559 gfc_error ("Need either entity or common block name for "
3560 "attribute specification statement at %C");
3564 /* Save the current identifier and look for more. */
3567 /* Increment the number of identifiers found for this spec stmt. */
3570 /* Make sure we have a sym or com block, and verify that it can
3571 be bind(c). Set the appropriate field(s) and look for more
3573 if (tmp_sym
!= NULL
|| com_block
!= NULL
)
3575 if (tmp_sym
!= NULL
)
3577 if (set_verify_bind_c_sym (tmp_sym
, num_idents
)
3583 if (set_verify_bind_c_com_block(com_block
, num_idents
)
3588 /* Look to see if we have another identifier. */
3590 if (gfc_match_eos () == MATCH_YES
)
3591 found_id
= MATCH_NO
;
3592 else if (gfc_match_char (',') != MATCH_YES
)
3593 found_id
= MATCH_NO
;
3594 else if (gfc_match_name (name
) == MATCH_YES
)
3596 found_id
= MATCH_YES
;
3597 gfc_get_ha_symbol (name
, &tmp_sym
);
3599 else if (match_common_name (name
) == MATCH_YES
)
3601 found_id
= MATCH_YES
;
3602 com_block
= gfc_get_common (name
, 0);
3606 gfc_error ("Missing entity or common block name for "
3607 "attribute specification statement at %C");
3613 gfc_internal_error ("Missing symbol");
3615 } while (found_id
== MATCH_YES
);
3617 /* if we get here we were successful */
3622 /* Try and match a BIND(C) attribute specification statement. */
3625 gfc_match_bind_c_stmt (void)
3627 match found_match
= MATCH_NO
;
3632 /* This may not be necessary. */
3634 /* Clear the temporary binding label holder. */
3635 curr_binding_label
[0] = '\0';
3637 /* Look for the bind(c). */
3638 found_match
= gfc_match_bind_c (NULL
, true);
3640 if (found_match
== MATCH_YES
)
3642 /* Look for the :: now, but it is not required. */
3645 /* Get the identifier(s) that needs to be updated. This may need to
3646 change to hand the flag(s) for the attr specified so all identifiers
3647 found can have all appropriate parts updated (assuming that the same
3648 spec stmt can have multiple attrs, such as both bind(c) and
3650 if (get_bind_c_idents () != SUCCESS
)
3651 /* Error message should have printed already. */
3659 /* Match a data declaration statement. */
3662 gfc_match_data_decl (void)
3668 num_idents_on_line
= 0;
3670 m
= gfc_match_type_spec (¤t_ts
, 0);
3674 if (current_ts
.type
== BT_DERIVED
&& gfc_current_state () != COMP_DERIVED
)
3676 sym
= gfc_use_derived (current_ts
.derived
);
3684 current_ts
.derived
= sym
;
3687 m
= match_attr_spec ();
3688 if (m
== MATCH_ERROR
)
3694 if (current_ts
.type
== BT_DERIVED
&& current_ts
.derived
->components
== NULL
3695 && !current_ts
.derived
->attr
.zero_comp
)
3698 if (current_attr
.pointer
&& gfc_current_state () == COMP_DERIVED
)
3701 gfc_find_symbol (current_ts
.derived
->name
,
3702 current_ts
.derived
->ns
->parent
, 1, &sym
);
3704 /* Any symbol that we find had better be a type definition
3705 which has its components defined. */
3706 if (sym
!= NULL
&& sym
->attr
.flavor
== FL_DERIVED
3707 && (current_ts
.derived
->components
!= NULL
3708 || current_ts
.derived
->attr
.zero_comp
))
3711 /* Now we have an error, which we signal, and then fix up
3712 because the knock-on is plain and simple confusing. */
3713 gfc_error_now ("Derived type at %C has not been previously defined "
3714 "and so cannot appear in a derived type definition");
3715 current_attr
.pointer
= 1;
3720 /* If we have an old-style character declaration, and no new-style
3721 attribute specifications, then there a comma is optional between
3722 the type specification and the variable list. */
3723 if (m
== MATCH_NO
&& current_ts
.type
== BT_CHARACTER
&& old_char_selector
)
3724 gfc_match_char (',');
3726 /* Give the types/attributes to symbols that follow. Give the element
3727 a number so that repeat character length expressions can be copied. */
3731 num_idents_on_line
++;
3732 m
= variable_decl (elem
++);
3733 if (m
== MATCH_ERROR
)
3738 if (gfc_match_eos () == MATCH_YES
)
3740 if (gfc_match_char (',') != MATCH_YES
)
3744 if (gfc_error_flag_test () == 0)
3745 gfc_error ("Syntax error in data declaration at %C");
3748 gfc_free_data_all (gfc_current_ns
);
3751 gfc_free_array_spec (current_as
);
3757 /* Match a prefix associated with a function or subroutine
3758 declaration. If the typespec pointer is nonnull, then a typespec
3759 can be matched. Note that if nothing matches, MATCH_YES is
3760 returned (the null string was matched). */
3763 gfc_match_prefix (gfc_typespec
*ts
)
3767 gfc_clear_attr (¤t_attr
);
3770 gcc_assert (!gfc_matching_prefix
);
3771 gfc_matching_prefix
= true;
3774 if (!seen_type
&& ts
!= NULL
3775 && gfc_match_type_spec (ts
, 0) == MATCH_YES
3776 && gfc_match_space () == MATCH_YES
)
3783 if (gfc_match ("elemental% ") == MATCH_YES
)
3785 if (gfc_add_elemental (¤t_attr
, NULL
) == FAILURE
)
3791 if (gfc_match ("pure% ") == MATCH_YES
)
3793 if (gfc_add_pure (¤t_attr
, NULL
) == FAILURE
)
3799 if (gfc_match ("recursive% ") == MATCH_YES
)
3801 if (gfc_add_recursive (¤t_attr
, NULL
) == FAILURE
)
3807 /* At this point, the next item is not a prefix. */
3808 gcc_assert (gfc_matching_prefix
);
3809 gfc_matching_prefix
= false;
3813 gcc_assert (gfc_matching_prefix
);
3814 gfc_matching_prefix
= false;
3819 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3822 copy_prefix (symbol_attribute
*dest
, locus
*where
)
3824 if (current_attr
.pure
&& gfc_add_pure (dest
, where
) == FAILURE
)
3827 if (current_attr
.elemental
&& gfc_add_elemental (dest
, where
) == FAILURE
)
3830 if (current_attr
.recursive
&& gfc_add_recursive (dest
, where
) == FAILURE
)
3837 /* Match a formal argument list. */
3840 gfc_match_formal_arglist (gfc_symbol
*progname
, int st_flag
, int null_flag
)
3842 gfc_formal_arglist
*head
, *tail
, *p
, *q
;
3843 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3849 if (gfc_match_char ('(') != MATCH_YES
)
3856 if (gfc_match_char (')') == MATCH_YES
)
3861 if (gfc_match_char ('*') == MATCH_YES
)
3865 m
= gfc_match_name (name
);
3869 if (gfc_get_symbol (name
, NULL
, &sym
))
3873 p
= gfc_get_formal_arglist ();
3885 /* We don't add the VARIABLE flavor because the name could be a
3886 dummy procedure. We don't apply these attributes to formal
3887 arguments of statement functions. */
3888 if (sym
!= NULL
&& !st_flag
3889 && (gfc_add_dummy (&sym
->attr
, sym
->name
, NULL
) == FAILURE
3890 || gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
))
3896 /* The name of a program unit can be in a different namespace,
3897 so check for it explicitly. After the statement is accepted,
3898 the name is checked for especially in gfc_get_symbol(). */
3899 if (gfc_new_block
!= NULL
&& sym
!= NULL
3900 && strcmp (sym
->name
, gfc_new_block
->name
) == 0)
3902 gfc_error ("Name '%s' at %C is the name of the procedure",
3908 if (gfc_match_char (')') == MATCH_YES
)
3911 m
= gfc_match_char (',');
3914 gfc_error ("Unexpected junk in formal argument list at %C");
3920 /* Check for duplicate symbols in the formal argument list. */
3923 for (p
= head
; p
->next
; p
= p
->next
)
3928 for (q
= p
->next
; q
; q
= q
->next
)
3929 if (p
->sym
== q
->sym
)
3931 gfc_error ("Duplicate symbol '%s' in formal argument list "
3932 "at %C", p
->sym
->name
);
3940 if (gfc_add_explicit_interface (progname
, IFSRC_DECL
, head
, NULL
)
3950 gfc_free_formal_arglist (head
);
3955 /* Match a RESULT specification following a function declaration or
3956 ENTRY statement. Also matches the end-of-statement. */
3959 match_result (gfc_symbol
*function
, gfc_symbol
**result
)
3961 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
3965 if (gfc_match (" result (") != MATCH_YES
)
3968 m
= gfc_match_name (name
);
3972 /* Get the right paren, and that's it because there could be the
3973 bind(c) attribute after the result clause. */
3974 if (gfc_match_char(')') != MATCH_YES
)
3976 /* TODO: should report the missing right paren here. */
3980 if (strcmp (function
->name
, name
) == 0)
3982 gfc_error ("RESULT variable at %C must be different than function name");
3986 if (gfc_get_symbol (name
, NULL
, &r
))
3989 if (gfc_add_result (&r
->attr
, r
->name
, NULL
) == FAILURE
)
3998 /* Match a function suffix, which could be a combination of a result
3999 clause and BIND(C), either one, or neither. The draft does not
4000 require them to come in a specific order. */
4003 gfc_match_suffix (gfc_symbol
*sym
, gfc_symbol
**result
)
4005 match is_bind_c
; /* Found bind(c). */
4006 match is_result
; /* Found result clause. */
4007 match found_match
; /* Status of whether we've found a good match. */
4008 char peek_char
; /* Character we're going to peek at. */
4009 bool allow_binding_name
;
4011 /* Initialize to having found nothing. */
4012 found_match
= MATCH_NO
;
4013 is_bind_c
= MATCH_NO
;
4014 is_result
= MATCH_NO
;
4016 /* Get the next char to narrow between result and bind(c). */
4017 gfc_gobble_whitespace ();
4018 peek_char
= gfc_peek_ascii_char ();
4020 /* C binding names are not allowed for internal procedures. */
4021 if (gfc_current_state () == COMP_CONTAINS
4022 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
4023 allow_binding_name
= false;
4025 allow_binding_name
= true;
4030 /* Look for result clause. */
4031 is_result
= match_result (sym
, result
);
4032 if (is_result
== MATCH_YES
)
4034 /* Now see if there is a bind(c) after it. */
4035 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4036 /* We've found the result clause and possibly bind(c). */
4037 found_match
= MATCH_YES
;
4040 /* This should only be MATCH_ERROR. */
4041 found_match
= is_result
;
4044 /* Look for bind(c) first. */
4045 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
4046 if (is_bind_c
== MATCH_YES
)
4048 /* Now see if a result clause followed it. */
4049 is_result
= match_result (sym
, result
);
4050 found_match
= MATCH_YES
;
4054 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4055 found_match
= MATCH_ERROR
;
4059 gfc_error ("Unexpected junk after function declaration at %C");
4060 found_match
= MATCH_ERROR
;
4064 if (is_bind_c
== MATCH_YES
)
4066 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4067 if (gfc_current_state () == COMP_CONTAINS
4068 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
4069 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
4070 "at %L may not be specified for an internal "
4071 "procedure", &gfc_current_locus
)
4075 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &gfc_current_locus
, 1)
4084 /* Procedure pointer return value without RESULT statement:
4085 Add "hidden" result variable named "ppr@". */
4088 add_hidden_procptr_result (gfc_symbol
*sym
)
4092 if (gfc_notification_std (GFC_STD_F2003
) == ERROR
)
4095 /* First usage case: PROCEDURE and EXTERNAL statements. */
4096 case1
= gfc_current_state () == COMP_FUNCTION
&& gfc_current_block ()
4097 && strcmp (gfc_current_block ()->name
, sym
->name
) == 0
4098 && sym
->attr
.external
;
4099 /* Second usage case: INTERFACE statements. */
4100 case2
= gfc_current_state () == COMP_INTERFACE
&& gfc_state_stack
->previous
4101 && gfc_state_stack
->previous
->state
== COMP_FUNCTION
4102 && strcmp (gfc_state_stack
->previous
->sym
->name
, sym
->name
) == 0;
4108 gfc_get_sym_tree ("ppr@", gfc_current_ns
, &stree
);
4112 gfc_get_sym_tree ("ppr@", gfc_current_ns
->parent
, &stree
);
4113 st2
= gfc_new_symtree (&gfc_current_ns
->sym_root
, "ppr@");
4114 st2
->n
.sym
= stree
->n
.sym
;
4116 sym
->result
= stree
->n
.sym
;
4118 sym
->result
->attr
.proc_pointer
= sym
->attr
.proc_pointer
;
4119 sym
->result
->attr
.pointer
= sym
->attr
.pointer
;
4120 sym
->result
->attr
.external
= sym
->attr
.external
;
4121 sym
->result
->attr
.referenced
= sym
->attr
.referenced
;
4122 sym
->attr
.proc_pointer
= 0;
4123 sym
->attr
.pointer
= 0;
4124 sym
->attr
.external
= 0;
4125 if (sym
->result
->attr
.external
&& sym
->result
->attr
.pointer
)
4127 sym
->result
->attr
.pointer
= 0;
4128 sym
->result
->attr
.proc_pointer
= 1;
4131 return gfc_add_result (&sym
->result
->attr
, sym
->result
->name
, NULL
);
4133 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4134 else if (sym
->attr
.function
&& !sym
->attr
.external
&& sym
->attr
.pointer
4135 && sym
->result
&& sym
->result
!= sym
&& sym
->result
->attr
.external
4136 && sym
== gfc_current_ns
->proc_name
4137 && sym
== sym
->result
->ns
->proc_name
4138 && strcmp ("ppr@", sym
->result
->name
) == 0)
4140 sym
->result
->attr
.proc_pointer
= 1;
4141 sym
->attr
.pointer
= 0;
4149 /* Match the interface for a PROCEDURE declaration,
4150 including brackets (R1212). */
4153 match_procedure_interface (gfc_symbol
**proc_if
)
4156 locus old_loc
, entry_loc
;
4157 old_loc
= entry_loc
= gfc_current_locus
;
4159 gfc_clear_ts (¤t_ts
);
4161 if (gfc_match (" (") != MATCH_YES
)
4163 gfc_current_locus
= entry_loc
;
4167 /* Get the type spec. for the procedure interface. */
4168 old_loc
= gfc_current_locus
;
4169 m
= gfc_match_type_spec (¤t_ts
, 0);
4170 gfc_gobble_whitespace ();
4171 if (m
== MATCH_YES
|| (m
== MATCH_NO
&& gfc_peek_ascii_char () == ')'))
4174 if (m
== MATCH_ERROR
)
4177 gfc_current_locus
= old_loc
;
4179 /* Get the name of the procedure or abstract interface
4180 to inherit the interface from. */
4181 m
= gfc_match_symbol (proc_if
, 1);
4185 /* Various interface checks. */
4189 /* Resolve interface if possible. That way, attr.procedure is only set
4190 if it is declared by a later procedure-declaration-stmt, which is
4191 invalid per C1212. */
4192 while ((*proc_if
)->ts
.interface
)
4193 *proc_if
= (*proc_if
)->ts
.interface
;
4195 if ((*proc_if
)->generic
)
4197 gfc_error ("Interface '%s' at %C may not be generic",
4201 if ((*proc_if
)->attr
.proc
== PROC_ST_FUNCTION
)
4203 gfc_error ("Interface '%s' at %C may not be a statement function",
4207 /* Handle intrinsic procedures. */
4208 if (!((*proc_if
)->attr
.external
|| (*proc_if
)->attr
.use_assoc
4209 || (*proc_if
)->attr
.if_source
== IFSRC_IFBODY
)
4210 && (gfc_is_intrinsic ((*proc_if
), 0, gfc_current_locus
)
4211 || gfc_is_intrinsic ((*proc_if
), 1, gfc_current_locus
)))
4212 (*proc_if
)->attr
.intrinsic
= 1;
4213 if ((*proc_if
)->attr
.intrinsic
4214 && !gfc_intrinsic_actual_ok ((*proc_if
)->name
, 0))
4216 gfc_error ("Intrinsic procedure '%s' not allowed "
4217 "in PROCEDURE statement at %C", (*proc_if
)->name
);
4223 if (gfc_match (" )") != MATCH_YES
)
4225 gfc_current_locus
= entry_loc
;
4233 /* Match a PROCEDURE declaration (R1211). */
4236 match_procedure_decl (void)
4239 gfc_symbol
*sym
, *proc_if
= NULL
;
4241 gfc_expr
*initializer
= NULL
;
4243 /* Parse interface (with brackets). */
4244 m
= match_procedure_interface (&proc_if
);
4248 /* Parse attributes (with colons). */
4249 m
= match_attr_spec();
4250 if (m
== MATCH_ERROR
)
4253 /* Get procedure symbols. */
4256 m
= gfc_match_symbol (&sym
, 0);
4259 else if (m
== MATCH_ERROR
)
4262 /* Add current_attr to the symbol attributes. */
4263 if (gfc_copy_attr (&sym
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4266 if (sym
->attr
.is_bind_c
)
4268 /* Check for C1218. */
4269 if (!proc_if
|| !proc_if
->attr
.is_bind_c
)
4271 gfc_error ("BIND(C) attribute at %C requires "
4272 "an interface with BIND(C)");
4275 /* Check for C1217. */
4276 if (has_name_equals
&& sym
->attr
.pointer
)
4278 gfc_error ("BIND(C) procedure with NAME may not have "
4279 "POINTER attribute at %C");
4282 if (has_name_equals
&& sym
->attr
.dummy
)
4284 gfc_error ("Dummy procedure at %C may not have "
4285 "BIND(C) attribute with NAME");
4288 /* Set binding label for BIND(C). */
4289 if (set_binding_label (sym
->binding_label
, sym
->name
, num
) != SUCCESS
)
4293 if (gfc_add_external (&sym
->attr
, NULL
) == FAILURE
)
4296 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4299 if (gfc_add_proc (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4302 /* Set interface. */
4303 if (proc_if
!= NULL
)
4305 if (sym
->ts
.type
!= BT_UNKNOWN
)
4307 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4308 sym
->name
, &gfc_current_locus
,
4309 gfc_basic_typename (sym
->ts
.type
));
4312 sym
->ts
.interface
= proc_if
;
4313 sym
->attr
.untyped
= 1;
4314 sym
->attr
.if_source
= IFSRC_IFBODY
;
4316 else if (current_ts
.type
!= BT_UNKNOWN
)
4318 if (gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4320 sym
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4321 sym
->ts
.interface
->ts
= current_ts
;
4322 sym
->ts
.interface
->attr
.function
= 1;
4323 sym
->attr
.function
= sym
->ts
.interface
->attr
.function
;
4324 sym
->attr
.if_source
= IFSRC_UNKNOWN
;
4327 if (gfc_match (" =>") == MATCH_YES
)
4329 if (!current_attr
.pointer
)
4331 gfc_error ("Initialization at %C isn't for a pointer variable");
4336 m
= gfc_match_null (&initializer
);
4339 gfc_error ("Pointer initialization requires a NULL() at %C");
4343 if (gfc_pure (NULL
))
4345 gfc_error ("Initialization of pointer at %C is not allowed in "
4346 "a PURE procedure");
4353 if (add_init_expr_to_sym (sym
->name
, &initializer
, &gfc_current_locus
)
4359 gfc_set_sym_referenced (sym
);
4361 if (gfc_match_eos () == MATCH_YES
)
4363 if (gfc_match_char (',') != MATCH_YES
)
4368 gfc_error ("Syntax error in PROCEDURE statement at %C");
4372 /* Free stuff up and return. */
4373 gfc_free_expr (initializer
);
4379 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
);
4382 /* Match a procedure pointer component declaration (R445). */
4385 match_ppc_decl (void)
4388 gfc_symbol
*proc_if
= NULL
;
4392 gfc_expr
*initializer
= NULL
;
4393 gfc_typebound_proc
* tb
;
4394 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4396 /* Parse interface (with brackets). */
4397 m
= match_procedure_interface (&proc_if
);
4401 /* Parse attributes. */
4402 tb
= XCNEW (gfc_typebound_proc
);
4403 tb
->where
= gfc_current_locus
;
4404 m
= match_binding_attributes (tb
, false, true);
4405 if (m
== MATCH_ERROR
)
4408 /* TODO: Implement PASS. */
4411 gfc_error ("Procedure Pointer Component with PASS at %C "
4412 "not yet implemented");
4416 gfc_clear_attr (¤t_attr
);
4417 current_attr
.procedure
= 1;
4418 current_attr
.proc_pointer
= 1;
4419 current_attr
.access
= tb
->access
;
4420 current_attr
.flavor
= FL_PROCEDURE
;
4422 /* Match the colons (required). */
4423 if (gfc_match (" ::") != MATCH_YES
)
4425 gfc_error ("Expected '::' after binding-attributes at %C");
4429 /* Check for C450. */
4430 if (!tb
->nopass
&& proc_if
== NULL
)
4432 gfc_error("NOPASS or explicit interface required at %C");
4436 /* Match PPC names. */
4440 m
= gfc_match_name (name
);
4443 else if (m
== MATCH_ERROR
)
4446 if (gfc_add_component (gfc_current_block (), name
, &c
) == FAILURE
)
4449 /* Add current_attr to the symbol attributes. */
4450 if (gfc_copy_attr (&c
->attr
, ¤t_attr
, NULL
) == FAILURE
)
4453 if (gfc_add_external (&c
->attr
, NULL
) == FAILURE
)
4456 if (gfc_add_proc (&c
->attr
, name
, NULL
) == FAILURE
)
4459 /* Set interface. */
4460 if (proc_if
!= NULL
)
4462 c
->ts
.interface
= proc_if
;
4463 c
->attr
.untyped
= 1;
4464 c
->attr
.if_source
= IFSRC_IFBODY
;
4466 else if (ts
.type
!= BT_UNKNOWN
)
4469 c
->ts
.interface
= gfc_new_symbol ("", gfc_current_ns
);
4470 c
->ts
.interface
->ts
= ts
;
4471 c
->ts
.interface
->attr
.function
= 1;
4472 c
->attr
.function
= c
->ts
.interface
->attr
.function
;
4473 c
->attr
.if_source
= IFSRC_UNKNOWN
;
4476 if (gfc_match (" =>") == MATCH_YES
)
4478 m
= gfc_match_null (&initializer
);
4481 gfc_error ("Pointer initialization requires a NULL() at %C");
4484 if (gfc_pure (NULL
))
4486 gfc_error ("Initialization of pointer at %C is not allowed in "
4487 "a PURE procedure");
4492 gfc_free_expr (initializer
);
4495 c
->initializer
= initializer
;
4498 if (gfc_match_eos () == MATCH_YES
)
4500 if (gfc_match_char (',') != MATCH_YES
)
4505 gfc_error ("Syntax error in procedure pointer component at %C");
4510 /* Match a PROCEDURE declaration inside an interface (R1206). */
4513 match_procedure_in_interface (void)
4517 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4519 if (current_interface
.type
== INTERFACE_NAMELESS
4520 || current_interface
.type
== INTERFACE_ABSTRACT
)
4522 gfc_error ("PROCEDURE at %C must be in a generic interface");
4528 m
= gfc_match_name (name
);
4531 else if (m
== MATCH_ERROR
)
4533 if (gfc_get_symbol (name
, gfc_current_ns
->parent
, &sym
))
4536 if (gfc_add_interface (sym
) == FAILURE
)
4539 if (gfc_match_eos () == MATCH_YES
)
4541 if (gfc_match_char (',') != MATCH_YES
)
4548 gfc_error ("Syntax error in PROCEDURE statement at %C");
4553 /* General matcher for PROCEDURE declarations. */
4555 static match
match_procedure_in_type (void);
4558 gfc_match_procedure (void)
4562 switch (gfc_current_state ())
4567 case COMP_SUBROUTINE
:
4569 m
= match_procedure_decl ();
4571 case COMP_INTERFACE
:
4572 m
= match_procedure_in_interface ();
4575 m
= match_ppc_decl ();
4577 case COMP_DERIVED_CONTAINS
:
4578 m
= match_procedure_in_type ();
4587 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROCEDURE statement at %C")
4595 /* Warn if a matched procedure has the same name as an intrinsic; this is
4596 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4597 parser-state-stack to find out whether we're in a module. */
4600 warn_intrinsic_shadow (const gfc_symbol
* sym
, bool func
)
4604 in_module
= (gfc_state_stack
->previous
4605 && gfc_state_stack
->previous
->state
== COMP_MODULE
);
4607 gfc_warn_intrinsic_shadow (sym
, in_module
, func
);
4611 /* Match a function declaration. */
4614 gfc_match_function_decl (void)
4616 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4617 gfc_symbol
*sym
, *result
;
4621 match found_match
; /* Status returned by match func. */
4623 if (gfc_current_state () != COMP_NONE
4624 && gfc_current_state () != COMP_INTERFACE
4625 && gfc_current_state () != COMP_CONTAINS
)
4628 gfc_clear_ts (¤t_ts
);
4630 old_loc
= gfc_current_locus
;
4632 m
= gfc_match_prefix (¤t_ts
);
4635 gfc_current_locus
= old_loc
;
4639 if (gfc_match ("function% %n", name
) != MATCH_YES
)
4641 gfc_current_locus
= old_loc
;
4644 if (get_proc_name (name
, &sym
, false))
4647 if (add_hidden_procptr_result (sym
) == SUCCESS
)
4650 gfc_new_block
= sym
;
4652 m
= gfc_match_formal_arglist (sym
, 0, 0);
4655 gfc_error ("Expected formal argument list in function "
4656 "definition at %C");
4660 else if (m
== MATCH_ERROR
)
4665 /* According to the draft, the bind(c) and result clause can
4666 come in either order after the formal_arg_list (i.e., either
4667 can be first, both can exist together or by themselves or neither
4668 one). Therefore, the match_result can't match the end of the
4669 string, and check for the bind(c) or result clause in either order. */
4670 found_match
= gfc_match_eos ();
4672 /* Make sure that it isn't already declared as BIND(C). If it is, it
4673 must have been marked BIND(C) with a BIND(C) attribute and that is
4674 not allowed for procedures. */
4675 if (sym
->attr
.is_bind_c
== 1)
4677 sym
->attr
.is_bind_c
= 0;
4678 if (sym
->old_symbol
!= NULL
)
4679 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4680 "variables or common blocks",
4681 &(sym
->old_symbol
->declared_at
));
4683 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4684 "variables or common blocks", &gfc_current_locus
);
4687 if (found_match
!= MATCH_YES
)
4689 /* If we haven't found the end-of-statement, look for a suffix. */
4690 suffix_match
= gfc_match_suffix (sym
, &result
);
4691 if (suffix_match
== MATCH_YES
)
4692 /* Need to get the eos now. */
4693 found_match
= gfc_match_eos ();
4695 found_match
= suffix_match
;
4698 if(found_match
!= MATCH_YES
)
4702 /* Make changes to the symbol. */
4705 if (gfc_add_function (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
4708 if (gfc_missing_attr (&sym
->attr
, NULL
) == FAILURE
4709 || copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
4712 /* Delay matching the function characteristics until after the
4713 specification block by signalling kind=-1. */
4714 sym
->declared_at
= old_loc
;
4715 if (current_ts
.type
!= BT_UNKNOWN
)
4716 current_ts
.kind
= -1;
4718 current_ts
.kind
= 0;
4722 if (current_ts
.type
!= BT_UNKNOWN
4723 && gfc_add_type (sym
, ¤t_ts
, &gfc_current_locus
) == FAILURE
)
4729 if (current_ts
.type
!= BT_UNKNOWN
4730 && gfc_add_type (result
, ¤t_ts
, &gfc_current_locus
)
4733 sym
->result
= result
;
4736 /* Warn if this procedure has the same name as an intrinsic. */
4737 warn_intrinsic_shadow (sym
, true);
4743 gfc_current_locus
= old_loc
;
4748 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4749 pass the name of the entry, rather than the gfc_current_block name, and
4750 to return false upon finding an existing global entry. */
4753 add_global_entry (const char *name
, int sub
)
4756 enum gfc_symbol_type type
;
4758 s
= gfc_get_gsymbol(name
);
4759 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
4762 || (s
->type
!= GSYM_UNKNOWN
4763 && s
->type
!= type
))
4764 gfc_global_used(s
, NULL
);
4768 s
->where
= gfc_current_locus
;
4770 s
->ns
= gfc_current_ns
;
4777 /* Match an ENTRY statement. */
4780 gfc_match_entry (void)
4785 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4786 gfc_compile_state state
;
4790 bool module_procedure
;
4794 m
= gfc_match_name (name
);
4798 state
= gfc_current_state ();
4799 if (state
!= COMP_SUBROUTINE
&& state
!= COMP_FUNCTION
)
4804 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4807 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4809 case COMP_BLOCK_DATA
:
4810 gfc_error ("ENTRY statement at %C cannot appear within "
4813 case COMP_INTERFACE
:
4814 gfc_error ("ENTRY statement at %C cannot appear within "
4818 gfc_error ("ENTRY statement at %C cannot appear within "
4819 "a DERIVED TYPE block");
4822 gfc_error ("ENTRY statement at %C cannot appear within "
4823 "an IF-THEN block");
4826 gfc_error ("ENTRY statement at %C cannot appear within "
4830 gfc_error ("ENTRY statement at %C cannot appear within "
4834 gfc_error ("ENTRY statement at %C cannot appear within "
4838 gfc_error ("ENTRY statement at %C cannot appear within "
4842 gfc_error ("ENTRY statement at %C cannot appear within "
4843 "a contained subprogram");
4846 gfc_internal_error ("gfc_match_entry(): Bad state");
4851 module_procedure
= gfc_current_ns
->parent
!= NULL
4852 && gfc_current_ns
->parent
->proc_name
4853 && gfc_current_ns
->parent
->proc_name
->attr
.flavor
4856 if (gfc_current_ns
->parent
!= NULL
4857 && gfc_current_ns
->parent
->proc_name
4858 && !module_procedure
)
4860 gfc_error("ENTRY statement at %C cannot appear in a "
4861 "contained procedure");
4865 /* Module function entries need special care in get_proc_name
4866 because previous references within the function will have
4867 created symbols attached to the current namespace. */
4868 if (get_proc_name (name
, &entry
,
4869 gfc_current_ns
->parent
!= NULL
4870 && module_procedure
))
4873 proc
= gfc_current_block ();
4875 /* Make sure that it isn't already declared as BIND(C). If it is, it
4876 must have been marked BIND(C) with a BIND(C) attribute and that is
4877 not allowed for procedures. */
4878 if (entry
->attr
.is_bind_c
== 1)
4880 entry
->attr
.is_bind_c
= 0;
4881 if (entry
->old_symbol
!= NULL
)
4882 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4883 "variables or common blocks",
4884 &(entry
->old_symbol
->declared_at
));
4886 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4887 "variables or common blocks", &gfc_current_locus
);
4890 /* Check what next non-whitespace character is so we can tell if there
4891 is the required parens if we have a BIND(C). */
4892 gfc_gobble_whitespace ();
4893 peek_char
= gfc_peek_ascii_char ();
4895 if (state
== COMP_SUBROUTINE
)
4897 /* An entry in a subroutine. */
4898 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 1))
4901 m
= gfc_match_formal_arglist (entry
, 0, 1);
4905 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4906 never be an internal procedure. */
4907 is_bind_c
= gfc_match_bind_c (entry
, true);
4908 if (is_bind_c
== MATCH_ERROR
)
4910 if (is_bind_c
== MATCH_YES
)
4912 if (peek_char
!= '(')
4914 gfc_error ("Missing required parentheses before BIND(C) at %C");
4917 if (gfc_add_is_bind_c (&(entry
->attr
), entry
->name
, &(entry
->declared_at
), 1)
4922 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4923 || gfc_add_subroutine (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4928 /* An entry in a function.
4929 We need to take special care because writing
4934 ENTRY f() RESULT (r)
4936 ENTRY f RESULT (r). */
4937 if (!gfc_current_ns
->parent
&& !add_global_entry (name
, 0))
4940 old_loc
= gfc_current_locus
;
4941 if (gfc_match_eos () == MATCH_YES
)
4943 gfc_current_locus
= old_loc
;
4944 /* Match the empty argument list, and add the interface to
4946 m
= gfc_match_formal_arglist (entry
, 0, 1);
4949 m
= gfc_match_formal_arglist (entry
, 0, 0);
4956 if (gfc_match_eos () == MATCH_YES
)
4958 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4959 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4962 entry
->result
= entry
;
4966 m
= gfc_match_suffix (entry
, &result
);
4968 gfc_syntax_error (ST_ENTRY
);
4974 if (gfc_add_result (&result
->attr
, result
->name
, NULL
) == FAILURE
4975 || gfc_add_entry (&entry
->attr
, result
->name
, NULL
) == FAILURE
4976 || gfc_add_function (&entry
->attr
, result
->name
, NULL
)
4979 entry
->result
= result
;
4983 if (gfc_add_entry (&entry
->attr
, entry
->name
, NULL
) == FAILURE
4984 || gfc_add_function (&entry
->attr
, entry
->name
, NULL
) == FAILURE
)
4986 entry
->result
= entry
;
4991 if (gfc_match_eos () != MATCH_YES
)
4993 gfc_syntax_error (ST_ENTRY
);
4997 entry
->attr
.recursive
= proc
->attr
.recursive
;
4998 entry
->attr
.elemental
= proc
->attr
.elemental
;
4999 entry
->attr
.pure
= proc
->attr
.pure
;
5001 el
= gfc_get_entry_list ();
5003 el
->next
= gfc_current_ns
->entries
;
5004 gfc_current_ns
->entries
= el
;
5006 el
->id
= el
->next
->id
+ 1;
5010 new_st
.op
= EXEC_ENTRY
;
5011 new_st
.ext
.entry
= el
;
5017 /* Match a subroutine statement, including optional prefixes. */
5020 gfc_match_subroutine (void)
5022 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5027 bool allow_binding_name
;
5029 if (gfc_current_state () != COMP_NONE
5030 && gfc_current_state () != COMP_INTERFACE
5031 && gfc_current_state () != COMP_CONTAINS
)
5034 m
= gfc_match_prefix (NULL
);
5038 m
= gfc_match ("subroutine% %n", name
);
5042 if (get_proc_name (name
, &sym
, false))
5045 if (add_hidden_procptr_result (sym
) == SUCCESS
)
5048 gfc_new_block
= sym
;
5050 /* Check what next non-whitespace character is so we can tell if there
5051 is the required parens if we have a BIND(C). */
5052 gfc_gobble_whitespace ();
5053 peek_char
= gfc_peek_ascii_char ();
5055 if (gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
) == FAILURE
)
5058 if (gfc_match_formal_arglist (sym
, 0, 1) != MATCH_YES
)
5061 /* Make sure that it isn't already declared as BIND(C). If it is, it
5062 must have been marked BIND(C) with a BIND(C) attribute and that is
5063 not allowed for procedures. */
5064 if (sym
->attr
.is_bind_c
== 1)
5066 sym
->attr
.is_bind_c
= 0;
5067 if (sym
->old_symbol
!= NULL
)
5068 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5069 "variables or common blocks",
5070 &(sym
->old_symbol
->declared_at
));
5072 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5073 "variables or common blocks", &gfc_current_locus
);
5076 /* C binding names are not allowed for internal procedures. */
5077 if (gfc_current_state () == COMP_CONTAINS
5078 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
5079 allow_binding_name
= false;
5081 allow_binding_name
= true;
5083 /* Here, we are just checking if it has the bind(c) attribute, and if
5084 so, then we need to make sure it's all correct. If it doesn't,
5085 we still need to continue matching the rest of the subroutine line. */
5086 is_bind_c
= gfc_match_bind_c (sym
, allow_binding_name
);
5087 if (is_bind_c
== MATCH_ERROR
)
5089 /* There was an attempt at the bind(c), but it was wrong. An
5090 error message should have been printed w/in the gfc_match_bind_c
5091 so here we'll just return the MATCH_ERROR. */
5095 if (is_bind_c
== MATCH_YES
)
5097 /* The following is allowed in the Fortran 2008 draft. */
5098 if (gfc_current_state () == COMP_CONTAINS
5099 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
5100 && gfc_notify_std (GFC_STD_F2008
, "Fortran 2008: BIND(C) attribute "
5101 "at %L may not be specified for an internal "
5102 "procedure", &gfc_current_locus
)
5106 if (peek_char
!= '(')
5108 gfc_error ("Missing required parentheses before BIND(C) at %C");
5111 if (gfc_add_is_bind_c (&(sym
->attr
), sym
->name
, &(sym
->declared_at
), 1)
5116 if (gfc_match_eos () != MATCH_YES
)
5118 gfc_syntax_error (ST_SUBROUTINE
);
5122 if (copy_prefix (&sym
->attr
, &sym
->declared_at
) == FAILURE
)
5125 /* Warn if it has the same name as an intrinsic. */
5126 warn_intrinsic_shadow (sym
, false);
5132 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5133 given, and set the binding label in either the given symbol (if not
5134 NULL), or in the current_ts. The symbol may be NULL because we may
5135 encounter the BIND(C) before the declaration itself. Return
5136 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5137 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5138 or MATCH_YES if the specifier was correct and the binding label and
5139 bind(c) fields were set correctly for the given symbol or the
5140 current_ts. If allow_binding_name is false, no binding name may be
5144 gfc_match_bind_c (gfc_symbol
*sym
, bool allow_binding_name
)
5146 /* binding label, if exists */
5147 char binding_label
[GFC_MAX_SYMBOL_LEN
+ 1];
5151 /* Initialize the flag that specifies whether we encountered a NAME=
5152 specifier or not. */
5153 has_name_equals
= 0;
5155 /* Init the first char to nil so we can catch if we don't have
5156 the label (name attr) or the symbol name yet. */
5157 binding_label
[0] = '\0';
5159 /* This much we have to be able to match, in this order, if
5160 there is a bind(c) label. */
5161 if (gfc_match (" bind ( c ") != MATCH_YES
)
5164 /* Now see if there is a binding label, or if we've reached the
5165 end of the bind(c) attribute without one. */
5166 if (gfc_match_char (',') == MATCH_YES
)
5168 if (gfc_match (" name = ") != MATCH_YES
)
5170 gfc_error ("Syntax error in NAME= specifier for binding label "
5172 /* should give an error message here */
5176 has_name_equals
= 1;
5178 /* Get the opening quote. */
5179 double_quote
= MATCH_YES
;
5180 single_quote
= MATCH_YES
;
5181 double_quote
= gfc_match_char ('"');
5182 if (double_quote
!= MATCH_YES
)
5183 single_quote
= gfc_match_char ('\'');
5184 if (double_quote
!= MATCH_YES
&& single_quote
!= MATCH_YES
)
5186 gfc_error ("Syntax error in NAME= specifier for binding label "
5191 /* Grab the binding label, using functions that will not lower
5192 case the names automatically. */
5193 if (gfc_match_name_C (binding_label
) != MATCH_YES
)
5196 /* Get the closing quotation. */
5197 if (double_quote
== MATCH_YES
)
5199 if (gfc_match_char ('"') != MATCH_YES
)
5201 gfc_error ("Missing closing quote '\"' for binding label at %C");
5202 /* User started string with '"' so looked to match it. */
5208 if (gfc_match_char ('\'') != MATCH_YES
)
5210 gfc_error ("Missing closing quote '\'' for binding label at %C");
5211 /* User started string with "'" char. */
5217 /* Get the required right paren. */
5218 if (gfc_match_char (')') != MATCH_YES
)
5220 gfc_error ("Missing closing paren for binding label at %C");
5224 if (has_name_equals
&& !allow_binding_name
)
5226 gfc_error ("No binding name is allowed in BIND(C) at %C");
5230 if (has_name_equals
&& sym
!= NULL
&& sym
->attr
.dummy
)
5232 gfc_error ("For dummy procedure %s, no binding name is "
5233 "allowed in BIND(C) at %C", sym
->name
);
5238 /* Save the binding label to the symbol. If sym is null, we're
5239 probably matching the typespec attributes of a declaration and
5240 haven't gotten the name yet, and therefore, no symbol yet. */
5241 if (binding_label
[0] != '\0')
5245 strcpy (sym
->binding_label
, binding_label
);
5248 strcpy (curr_binding_label
, binding_label
);
5250 else if (allow_binding_name
)
5252 /* No binding label, but if symbol isn't null, we
5253 can set the label for it here.
5254 If name="" or allow_binding_name is false, no C binding name is
5256 if (sym
!= NULL
&& sym
->name
!= NULL
&& has_name_equals
== 0)
5257 strncpy (sym
->binding_label
, sym
->name
, strlen (sym
->name
) + 1);
5260 if (has_name_equals
&& gfc_current_state () == COMP_INTERFACE
5261 && current_interface
.type
== INTERFACE_ABSTRACT
)
5263 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5271 /* Return nonzero if we're currently compiling a contained procedure. */
5274 contained_procedure (void)
5276 gfc_state_data
*s
= gfc_state_stack
;
5278 if ((s
->state
== COMP_SUBROUTINE
|| s
->state
== COMP_FUNCTION
)
5279 && s
->previous
!= NULL
&& s
->previous
->state
== COMP_CONTAINS
)
5285 /* Set the kind of each enumerator. The kind is selected such that it is
5286 interoperable with the corresponding C enumeration type, making
5287 sure that -fshort-enums is honored. */
5292 enumerator_history
*current_history
= NULL
;
5296 if (max_enum
== NULL
|| enum_history
== NULL
)
5299 if (!flag_short_enums
)
5305 kind
= gfc_integer_kinds
[i
++].kind
;
5307 while (kind
< gfc_c_int_kind
5308 && gfc_check_integer_range (max_enum
->initializer
->value
.integer
,
5311 current_history
= enum_history
;
5312 while (current_history
!= NULL
)
5314 current_history
->sym
->ts
.kind
= kind
;
5315 current_history
= current_history
->next
;
5320 /* Match any of the various end-block statements. Returns the type of
5321 END to the caller. The END INTERFACE, END IF, END DO and END
5322 SELECT statements cannot be replaced by a single END statement. */
5325 gfc_match_end (gfc_statement
*st
)
5327 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5328 gfc_compile_state state
;
5330 const char *block_name
;
5335 old_loc
= gfc_current_locus
;
5336 if (gfc_match ("end") != MATCH_YES
)
5339 state
= gfc_current_state ();
5340 block_name
= gfc_current_block () == NULL
5341 ? NULL
: gfc_current_block ()->name
;
5343 if (state
== COMP_CONTAINS
|| state
== COMP_DERIVED_CONTAINS
)
5345 state
= gfc_state_stack
->previous
->state
;
5346 block_name
= gfc_state_stack
->previous
->sym
== NULL
5347 ? NULL
: gfc_state_stack
->previous
->sym
->name
;
5354 *st
= ST_END_PROGRAM
;
5355 target
= " program";
5359 case COMP_SUBROUTINE
:
5360 *st
= ST_END_SUBROUTINE
;
5361 target
= " subroutine";
5362 eos_ok
= !contained_procedure ();
5366 *st
= ST_END_FUNCTION
;
5367 target
= " function";
5368 eos_ok
= !contained_procedure ();
5371 case COMP_BLOCK_DATA
:
5372 *st
= ST_END_BLOCK_DATA
;
5373 target
= " block data";
5378 *st
= ST_END_MODULE
;
5383 case COMP_INTERFACE
:
5384 *st
= ST_END_INTERFACE
;
5385 target
= " interface";
5390 case COMP_DERIVED_CONTAINS
:
5409 *st
= ST_END_SELECT
;
5415 *st
= ST_END_FORALL
;
5430 last_initializer
= NULL
;
5432 gfc_free_enum_history ();
5436 gfc_error ("Unexpected END statement at %C");
5440 if (gfc_match_eos () == MATCH_YES
)
5444 /* We would have required END [something]. */
5445 gfc_error ("%s statement expected at %L",
5446 gfc_ascii_statement (*st
), &old_loc
);
5453 /* Verify that we've got the sort of end-block that we're expecting. */
5454 if (gfc_match (target
) != MATCH_YES
)
5456 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st
));
5460 /* If we're at the end, make sure a block name wasn't required. */
5461 if (gfc_match_eos () == MATCH_YES
)
5464 if (*st
!= ST_ENDDO
&& *st
!= ST_ENDIF
&& *st
!= ST_END_SELECT
5465 && *st
!= ST_END_FORALL
&& *st
!= ST_END_WHERE
)
5468 if (gfc_current_block () == NULL
)
5471 gfc_error ("Expected block name of '%s' in %s statement at %C",
5472 block_name
, gfc_ascii_statement (*st
));
5477 /* END INTERFACE has a special handler for its several possible endings. */
5478 if (*st
== ST_END_INTERFACE
)
5479 return gfc_match_end_interface ();
5481 /* We haven't hit the end of statement, so what is left must be an
5483 m
= gfc_match_space ();
5485 m
= gfc_match_name (name
);
5488 gfc_error ("Expected terminating name at %C");
5492 if (block_name
== NULL
)
5495 if (strcmp (name
, block_name
) != 0 && strcmp (block_name
, "ppr@") != 0)
5497 gfc_error ("Expected label '%s' for %s statement at %C", block_name
,
5498 gfc_ascii_statement (*st
));
5501 /* Procedure pointer as function result. */
5502 else if (strcmp (block_name
, "ppr@") == 0
5503 && strcmp (name
, gfc_current_block ()->ns
->proc_name
->name
) != 0)
5505 gfc_error ("Expected label '%s' for %s statement at %C",
5506 gfc_current_block ()->ns
->proc_name
->name
,
5507 gfc_ascii_statement (*st
));
5511 if (gfc_match_eos () == MATCH_YES
)
5515 gfc_syntax_error (*st
);
5518 gfc_current_locus
= old_loc
;
5524 /***************** Attribute declaration statements ****************/
5526 /* Set the attribute of a single variable. */
5531 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5539 m
= gfc_match_name (name
);
5543 if (find_special (name
, &sym
))
5546 var_locus
= gfc_current_locus
;
5548 /* Deal with possible array specification for certain attributes. */
5549 if (current_attr
.dimension
5550 || current_attr
.allocatable
5551 || current_attr
.pointer
5552 || current_attr
.target
)
5554 m
= gfc_match_array_spec (&as
);
5555 if (m
== MATCH_ERROR
)
5558 if (current_attr
.dimension
&& m
== MATCH_NO
)
5560 gfc_error ("Missing array specification at %L in DIMENSION "
5561 "statement", &var_locus
);
5566 if (current_attr
.dimension
&& sym
->value
)
5568 gfc_error ("Dimensions specified for %s at %L after its "
5569 "initialisation", sym
->name
, &var_locus
);
5574 if ((current_attr
.allocatable
|| current_attr
.pointer
)
5575 && (m
== MATCH_YES
) && (as
->type
!= AS_DEFERRED
))
5577 gfc_error ("Array specification must be deferred at %L", &var_locus
);
5583 /* Update symbol table. DIMENSION attribute is set
5584 in gfc_set_array_spec(). */
5585 if (current_attr
.dimension
== 0
5586 && gfc_copy_attr (&sym
->attr
, ¤t_attr
, &var_locus
) == FAILURE
)
5592 if (gfc_set_array_spec (sym
, as
, &var_locus
) == FAILURE
)
5598 if (sym
->attr
.cray_pointee
&& sym
->as
!= NULL
)
5600 /* Fix the array spec. */
5601 m
= gfc_mod_pointee_as (sym
->as
);
5602 if (m
== MATCH_ERROR
)
5606 if (gfc_add_attribute (&sym
->attr
, &var_locus
) == FAILURE
)
5612 if ((current_attr
.external
|| current_attr
.intrinsic
)
5613 && sym
->attr
.flavor
!= FL_PROCEDURE
5614 && gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, NULL
) == FAILURE
)
5620 add_hidden_procptr_result (sym
);
5625 gfc_free_array_spec (as
);
5630 /* Generic attribute declaration subroutine. Used for attributes that
5631 just have a list of names. */
5638 /* Gobble the optional double colon, by simply ignoring the result
5648 if (gfc_match_eos () == MATCH_YES
)
5654 if (gfc_match_char (',') != MATCH_YES
)
5656 gfc_error ("Unexpected character in variable list at %C");
5666 /* This routine matches Cray Pointer declarations of the form:
5667 pointer ( <pointer>, <pointee> )
5669 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5670 The pointer, if already declared, should be an integer. Otherwise, we
5671 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5672 be either a scalar, or an array declaration. No space is allocated for
5673 the pointee. For the statement
5674 pointer (ipt, ar(10))
5675 any subsequent uses of ar will be translated (in C-notation) as
5676 ar(i) => ((<type> *) ipt)(i)
5677 After gimplification, pointee variable will disappear in the code. */
5680 cray_pointer_decl (void)
5684 gfc_symbol
*cptr
; /* Pointer symbol. */
5685 gfc_symbol
*cpte
; /* Pointee symbol. */
5691 if (gfc_match_char ('(') != MATCH_YES
)
5693 gfc_error ("Expected '(' at %C");
5697 /* Match pointer. */
5698 var_locus
= gfc_current_locus
;
5699 gfc_clear_attr (¤t_attr
);
5700 gfc_add_cray_pointer (¤t_attr
, &var_locus
);
5701 current_ts
.type
= BT_INTEGER
;
5702 current_ts
.kind
= gfc_index_integer_kind
;
5704 m
= gfc_match_symbol (&cptr
, 0);
5707 gfc_error ("Expected variable name at %C");
5711 if (gfc_add_cray_pointer (&cptr
->attr
, &var_locus
) == FAILURE
)
5714 gfc_set_sym_referenced (cptr
);
5716 if (cptr
->ts
.type
== BT_UNKNOWN
) /* Override the type, if necessary. */
5718 cptr
->ts
.type
= BT_INTEGER
;
5719 cptr
->ts
.kind
= gfc_index_integer_kind
;
5721 else if (cptr
->ts
.type
!= BT_INTEGER
)
5723 gfc_error ("Cray pointer at %C must be an integer");
5726 else if (cptr
->ts
.kind
< gfc_index_integer_kind
)
5727 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5728 " memory addresses require %d bytes",
5729 cptr
->ts
.kind
, gfc_index_integer_kind
);
5731 if (gfc_match_char (',') != MATCH_YES
)
5733 gfc_error ("Expected \",\" at %C");
5737 /* Match Pointee. */
5738 var_locus
= gfc_current_locus
;
5739 gfc_clear_attr (¤t_attr
);
5740 gfc_add_cray_pointee (¤t_attr
, &var_locus
);
5741 current_ts
.type
= BT_UNKNOWN
;
5742 current_ts
.kind
= 0;
5744 m
= gfc_match_symbol (&cpte
, 0);
5747 gfc_error ("Expected variable name at %C");
5751 /* Check for an optional array spec. */
5752 m
= gfc_match_array_spec (&as
);
5753 if (m
== MATCH_ERROR
)
5755 gfc_free_array_spec (as
);
5758 else if (m
== MATCH_NO
)
5760 gfc_free_array_spec (as
);
5764 if (gfc_add_cray_pointee (&cpte
->attr
, &var_locus
) == FAILURE
)
5767 gfc_set_sym_referenced (cpte
);
5769 if (cpte
->as
== NULL
)
5771 if (gfc_set_array_spec (cpte
, as
, &var_locus
) == FAILURE
)
5772 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5774 else if (as
!= NULL
)
5776 gfc_error ("Duplicate array spec for Cray pointee at %C");
5777 gfc_free_array_spec (as
);
5783 if (cpte
->as
!= NULL
)
5785 /* Fix array spec. */
5786 m
= gfc_mod_pointee_as (cpte
->as
);
5787 if (m
== MATCH_ERROR
)
5791 /* Point the Pointee at the Pointer. */
5792 cpte
->cp_pointer
= cptr
;
5794 if (gfc_match_char (')') != MATCH_YES
)
5796 gfc_error ("Expected \")\" at %C");
5799 m
= gfc_match_char (',');
5801 done
= true; /* Stop searching for more declarations. */
5805 if (m
== MATCH_ERROR
/* Failed when trying to find ',' above. */
5806 || gfc_match_eos () != MATCH_YES
)
5808 gfc_error ("Expected \",\" or end of statement at %C");
5816 gfc_match_external (void)
5819 gfc_clear_attr (¤t_attr
);
5820 current_attr
.external
= 1;
5822 return attr_decl ();
5827 gfc_match_intent (void)
5831 intent
= match_intent_spec ();
5832 if (intent
== INTENT_UNKNOWN
)
5835 gfc_clear_attr (¤t_attr
);
5836 current_attr
.intent
= intent
;
5838 return attr_decl ();
5843 gfc_match_intrinsic (void)
5846 gfc_clear_attr (¤t_attr
);
5847 current_attr
.intrinsic
= 1;
5849 return attr_decl ();
5854 gfc_match_optional (void)
5857 gfc_clear_attr (¤t_attr
);
5858 current_attr
.optional
= 1;
5860 return attr_decl ();
5865 gfc_match_pointer (void)
5867 gfc_gobble_whitespace ();
5868 if (gfc_peek_ascii_char () == '(')
5870 if (!gfc_option
.flag_cray_pointer
)
5872 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5876 return cray_pointer_decl ();
5880 gfc_clear_attr (¤t_attr
);
5881 current_attr
.pointer
= 1;
5883 return attr_decl ();
5889 gfc_match_allocatable (void)
5891 gfc_clear_attr (¤t_attr
);
5892 current_attr
.allocatable
= 1;
5894 return attr_decl ();
5899 gfc_match_dimension (void)
5901 gfc_clear_attr (¤t_attr
);
5902 current_attr
.dimension
= 1;
5904 return attr_decl ();
5909 gfc_match_target (void)
5911 gfc_clear_attr (¤t_attr
);
5912 current_attr
.target
= 1;
5914 return attr_decl ();
5918 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5922 access_attr_decl (gfc_statement st
)
5924 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5925 interface_type type
;
5928 gfc_intrinsic_op op
;
5931 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
5936 m
= gfc_match_generic_spec (&type
, name
, &op
);
5939 if (m
== MATCH_ERROR
)
5944 case INTERFACE_NAMELESS
:
5945 case INTERFACE_ABSTRACT
:
5948 case INTERFACE_GENERIC
:
5949 if (gfc_get_symbol (name
, NULL
, &sym
))
5952 if (gfc_add_access (&sym
->attr
, (st
== ST_PUBLIC
)
5953 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
,
5954 sym
->name
, NULL
) == FAILURE
)
5959 case INTERFACE_INTRINSIC_OP
:
5960 if (gfc_current_ns
->operator_access
[op
] == ACCESS_UNKNOWN
)
5962 gfc_current_ns
->operator_access
[op
] =
5963 (st
== ST_PUBLIC
) ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
5967 gfc_error ("Access specification of the %s operator at %C has "
5968 "already been specified", gfc_op2string (op
));
5974 case INTERFACE_USER_OP
:
5975 uop
= gfc_get_uop (name
);
5977 if (uop
->access
== ACCESS_UNKNOWN
)
5979 uop
->access
= (st
== ST_PUBLIC
)
5980 ? ACCESS_PUBLIC
: ACCESS_PRIVATE
;
5984 gfc_error ("Access specification of the .%s. operator at %C "
5985 "has already been specified", sym
->name
);
5992 if (gfc_match_char (',') == MATCH_NO
)
5996 if (gfc_match_eos () != MATCH_YES
)
6001 gfc_syntax_error (st
);
6009 gfc_match_protected (void)
6014 if (gfc_current_ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
6016 gfc_error ("PROTECTED at %C only allowed in specification "
6017 "part of a module");
6022 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: PROTECTED statement at %C")
6026 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6031 if (gfc_match_eos () == MATCH_YES
)
6036 m
= gfc_match_symbol (&sym
, 0);
6040 if (gfc_add_protected (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6053 if (gfc_match_eos () == MATCH_YES
)
6055 if (gfc_match_char (',') != MATCH_YES
)
6062 gfc_error ("Syntax error in PROTECTED statement at %C");
6067 /* The PRIVATE statement is a bit weird in that it can be an attribute
6068 declaration, but also works as a standalone statement inside of a
6069 type declaration or a module. */
6072 gfc_match_private (gfc_statement
*st
)
6075 if (gfc_match ("private") != MATCH_YES
)
6078 if (gfc_current_state () != COMP_MODULE
6079 && !(gfc_current_state () == COMP_DERIVED
6080 && gfc_state_stack
->previous
6081 && gfc_state_stack
->previous
->state
== COMP_MODULE
)
6082 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6083 && gfc_state_stack
->previous
&& gfc_state_stack
->previous
->previous
6084 && gfc_state_stack
->previous
->previous
->state
== COMP_MODULE
))
6086 gfc_error ("PRIVATE statement at %C is only allowed in the "
6087 "specification part of a module");
6091 if (gfc_current_state () == COMP_DERIVED
)
6093 if (gfc_match_eos () == MATCH_YES
)
6099 gfc_syntax_error (ST_PRIVATE
);
6103 if (gfc_match_eos () == MATCH_YES
)
6110 return access_attr_decl (ST_PRIVATE
);
6115 gfc_match_public (gfc_statement
*st
)
6118 if (gfc_match ("public") != MATCH_YES
)
6121 if (gfc_current_state () != COMP_MODULE
)
6123 gfc_error ("PUBLIC statement at %C is only allowed in the "
6124 "specification part of a module");
6128 if (gfc_match_eos () == MATCH_YES
)
6135 return access_attr_decl (ST_PUBLIC
);
6139 /* Workhorse for gfc_match_parameter. */
6148 m
= gfc_match_symbol (&sym
, 0);
6150 gfc_error ("Expected variable name at %C in PARAMETER statement");
6155 if (gfc_match_char ('=') == MATCH_NO
)
6157 gfc_error ("Expected = sign in PARAMETER statement at %C");
6161 m
= gfc_match_init_expr (&init
);
6163 gfc_error ("Expected expression at %C in PARAMETER statement");
6167 if (sym
->ts
.type
== BT_UNKNOWN
6168 && gfc_set_default_type (sym
, 1, NULL
) == FAILURE
)
6174 if (gfc_check_assign_symbol (sym
, init
) == FAILURE
6175 || gfc_add_flavor (&sym
->attr
, FL_PARAMETER
, sym
->name
, NULL
) == FAILURE
)
6183 gfc_error ("Initializing already initialized variable at %C");
6188 if (sym
->ts
.type
== BT_CHARACTER
6189 && sym
->ts
.cl
!= NULL
6190 && sym
->ts
.cl
->length
!= NULL
6191 && sym
->ts
.cl
->length
->expr_type
== EXPR_CONSTANT
6192 && init
->expr_type
== EXPR_CONSTANT
6193 && init
->ts
.type
== BT_CHARACTER
)
6194 gfc_set_constant_character_len (
6195 mpz_get_si (sym
->ts
.cl
->length
->value
.integer
), init
, -1);
6196 else if (sym
->ts
.type
== BT_CHARACTER
&& sym
->ts
.cl
!= NULL
6197 && sym
->ts
.cl
->length
== NULL
)
6200 if (init
->expr_type
== EXPR_CONSTANT
)
6202 clen
= init
->value
.character
.length
;
6203 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
6205 else if (init
->expr_type
== EXPR_ARRAY
)
6207 gfc_expr
*p
= init
->value
.constructor
->expr
;
6208 clen
= p
->value
.character
.length
;
6209 sym
->ts
.cl
->length
= gfc_int_expr (clen
);
6211 else if (init
->ts
.cl
&& init
->ts
.cl
->length
)
6212 sym
->ts
.cl
->length
= gfc_copy_expr (sym
->value
->ts
.cl
->length
);
6219 gfc_free_expr (init
);
6224 /* Match a parameter statement, with the weird syntax that these have. */
6227 gfc_match_parameter (void)
6231 if (gfc_match_char ('(') == MATCH_NO
)
6240 if (gfc_match (" )%t") == MATCH_YES
)
6243 if (gfc_match_char (',') != MATCH_YES
)
6245 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6255 /* Save statements have a special syntax. */
6258 gfc_match_save (void)
6260 char n
[GFC_MAX_SYMBOL_LEN
+1];
6265 if (gfc_match_eos () == MATCH_YES
)
6267 if (gfc_current_ns
->seen_save
)
6269 if (gfc_notify_std (GFC_STD_LEGACY
, "Blanket SAVE statement at %C "
6270 "follows previous SAVE statement")
6275 gfc_current_ns
->save_all
= gfc_current_ns
->seen_save
= 1;
6279 if (gfc_current_ns
->save_all
)
6281 if (gfc_notify_std (GFC_STD_LEGACY
, "SAVE statement at %C follows "
6282 "blanket SAVE statement")
6291 m
= gfc_match_symbol (&sym
, 0);
6295 if (gfc_add_save (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6307 m
= gfc_match (" / %n /", &n
);
6308 if (m
== MATCH_ERROR
)
6313 c
= gfc_get_common (n
, 0);
6316 gfc_current_ns
->seen_save
= 1;
6319 if (gfc_match_eos () == MATCH_YES
)
6321 if (gfc_match_char (',') != MATCH_YES
)
6328 gfc_error ("Syntax error in SAVE statement at %C");
6334 gfc_match_value (void)
6339 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VALUE statement at %C")
6343 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6348 if (gfc_match_eos () == MATCH_YES
)
6353 m
= gfc_match_symbol (&sym
, 0);
6357 if (gfc_add_value (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6370 if (gfc_match_eos () == MATCH_YES
)
6372 if (gfc_match_char (',') != MATCH_YES
)
6379 gfc_error ("Syntax error in VALUE statement at %C");
6385 gfc_match_volatile (void)
6390 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: VOLATILE statement at %C")
6394 if (gfc_match (" ::") == MATCH_NO
&& gfc_match_space () == MATCH_NO
)
6399 if (gfc_match_eos () == MATCH_YES
)
6404 /* VOLATILE is special because it can be added to host-associated
6406 m
= gfc_match_symbol (&sym
, 1);
6410 if (gfc_add_volatile (&sym
->attr
, sym
->name
, &gfc_current_locus
)
6423 if (gfc_match_eos () == MATCH_YES
)
6425 if (gfc_match_char (',') != MATCH_YES
)
6432 gfc_error ("Syntax error in VOLATILE statement at %C");
6437 /* Match a module procedure statement. Note that we have to modify
6438 symbols in the parent's namespace because the current one was there
6439 to receive symbols that are in an interface's formal argument list. */
6442 gfc_match_modproc (void)
6444 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6447 gfc_namespace
*module_ns
;
6448 gfc_interface
*old_interface_head
, *interface
;
6450 if (gfc_state_stack
->state
!= COMP_INTERFACE
6451 || gfc_state_stack
->previous
== NULL
6452 || current_interface
.type
== INTERFACE_NAMELESS
6453 || current_interface
.type
== INTERFACE_ABSTRACT
)
6455 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6460 module_ns
= gfc_current_ns
->parent
;
6461 for (; module_ns
; module_ns
= module_ns
->parent
)
6462 if (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
)
6465 if (module_ns
== NULL
)
6468 /* Store the current state of the interface. We will need it if we
6469 end up with a syntax error and need to recover. */
6470 old_interface_head
= gfc_current_interface_head ();
6476 m
= gfc_match_name (name
);
6482 /* Check for syntax error before starting to add symbols to the
6483 current namespace. */
6484 if (gfc_match_eos () == MATCH_YES
)
6486 if (!last
&& gfc_match_char (',') != MATCH_YES
)
6489 /* Now we're sure the syntax is valid, we process this item
6491 if (gfc_get_symbol (name
, module_ns
, &sym
))
6494 if (sym
->attr
.proc
!= PROC_MODULE
6495 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
6496 sym
->name
, NULL
) == FAILURE
)
6499 if (gfc_add_interface (sym
) == FAILURE
)
6502 sym
->attr
.mod_proc
= 1;
6511 /* Restore the previous state of the interface. */
6512 interface
= gfc_current_interface_head ();
6513 gfc_set_current_interface_head (old_interface_head
);
6515 /* Free the new interfaces. */
6516 while (interface
!= old_interface_head
)
6518 gfc_interface
*i
= interface
->next
;
6519 gfc_free (interface
);
6523 /* And issue a syntax error. */
6524 gfc_syntax_error (ST_MODULE_PROC
);
6529 /* Check a derived type that is being extended. */
6531 check_extended_derived_type (char *name
)
6533 gfc_symbol
*extended
;
6535 if (gfc_find_symbol (name
, gfc_current_ns
, 1, &extended
))
6537 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6543 gfc_error ("No such symbol in TYPE definition at %C");
6547 if (extended
->attr
.flavor
!= FL_DERIVED
)
6549 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6550 "derived type", name
);
6554 if (extended
->attr
.is_bind_c
)
6556 gfc_error ("'%s' cannot be extended at %C because it "
6557 "is BIND(C)", extended
->name
);
6561 if (extended
->attr
.sequence
)
6563 gfc_error ("'%s' cannot be extended at %C because it "
6564 "is a SEQUENCE type", extended
->name
);
6572 /* Match the optional attribute specifiers for a type declaration.
6573 Return MATCH_ERROR if an error is encountered in one of the handled
6574 attributes (public, private, bind(c)), MATCH_NO if what's found is
6575 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6576 checking on attribute conflicts needs to be done. */
6579 gfc_get_type_attr_spec (symbol_attribute
*attr
, char *name
)
6581 /* See if the derived type is marked as private. */
6582 if (gfc_match (" , private") == MATCH_YES
)
6584 if (gfc_current_state () != COMP_MODULE
)
6586 gfc_error ("Derived type at %C can only be PRIVATE in the "
6587 "specification part of a module");
6591 if (gfc_add_access (attr
, ACCESS_PRIVATE
, NULL
, NULL
) == FAILURE
)
6594 else if (gfc_match (" , public") == MATCH_YES
)
6596 if (gfc_current_state () != COMP_MODULE
)
6598 gfc_error ("Derived type at %C can only be PUBLIC in the "
6599 "specification part of a module");
6603 if (gfc_add_access (attr
, ACCESS_PUBLIC
, NULL
, NULL
) == FAILURE
)
6606 else if (gfc_match (" , bind ( c )") == MATCH_YES
)
6608 /* If the type is defined to be bind(c) it then needs to make
6609 sure that all fields are interoperable. This will
6610 need to be a semantic check on the finished derived type.
6611 See 15.2.3 (lines 9-12) of F2003 draft. */
6612 if (gfc_add_is_bind_c (attr
, NULL
, &gfc_current_locus
, 0) != SUCCESS
)
6615 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6617 else if (gfc_match (" , abstract") == MATCH_YES
)
6619 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ABSTRACT type at %C")
6623 if (gfc_add_abstract (attr
, &gfc_current_locus
) == FAILURE
)
6626 else if (name
&& gfc_match(" , extends ( %n )", name
) == MATCH_YES
)
6628 if (gfc_add_extension (attr
, &gfc_current_locus
) == FAILURE
)
6634 /* If we get here, something matched. */
6639 /* Match the beginning of a derived type declaration. If a type name
6640 was the result of a function, then it is possible to have a symbol
6641 already to be known as a derived type yet have no components. */
6644 gfc_match_derived_decl (void)
6646 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6647 char parent
[GFC_MAX_SYMBOL_LEN
+ 1];
6648 symbol_attribute attr
;
6650 gfc_symbol
*extended
;
6652 match is_type_attr_spec
= MATCH_NO
;
6653 bool seen_attr
= false;
6655 if (gfc_current_state () == COMP_DERIVED
)
6660 gfc_clear_attr (&attr
);
6665 is_type_attr_spec
= gfc_get_type_attr_spec (&attr
, parent
);
6666 if (is_type_attr_spec
== MATCH_ERROR
)
6668 if (is_type_attr_spec
== MATCH_YES
)
6670 } while (is_type_attr_spec
== MATCH_YES
);
6672 /* Deal with derived type extensions. The extension attribute has
6673 been added to 'attr' but now the parent type must be found and
6676 extended
= check_extended_derived_type (parent
);
6678 if (parent
[0] && !extended
)
6681 if (gfc_match (" ::") != MATCH_YES
&& seen_attr
)
6683 gfc_error ("Expected :: in TYPE definition at %C");
6687 m
= gfc_match (" %n%t", name
);
6691 /* Make sure the name is not the name of an intrinsic type. */
6692 if (gfc_is_intrinsic_typename (name
))
6694 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6699 if (gfc_get_symbol (name
, NULL
, &sym
))
6702 if (sym
->ts
.type
!= BT_UNKNOWN
)
6704 gfc_error ("Derived type name '%s' at %C already has a basic type "
6705 "of %s", sym
->name
, gfc_typename (&sym
->ts
));
6709 /* The symbol may already have the derived attribute without the
6710 components. The ways this can happen is via a function
6711 definition, an INTRINSIC statement or a subtype in another
6712 derived type that is a pointer. The first part of the AND clause
6713 is true if the symbol is not the return value of a function. */
6714 if (sym
->attr
.flavor
!= FL_DERIVED
6715 && gfc_add_flavor (&sym
->attr
, FL_DERIVED
, sym
->name
, NULL
) == FAILURE
)
6718 if (sym
->components
!= NULL
|| sym
->attr
.zero_comp
)
6720 gfc_error ("Derived type definition of '%s' at %C has already been "
6721 "defined", sym
->name
);
6725 if (attr
.access
!= ACCESS_UNKNOWN
6726 && gfc_add_access (&sym
->attr
, attr
.access
, sym
->name
, NULL
) == FAILURE
)
6729 /* See if the derived type was labeled as bind(c). */
6730 if (attr
.is_bind_c
!= 0)
6731 sym
->attr
.is_bind_c
= attr
.is_bind_c
;
6733 /* Construct the f2k_derived namespace if it is not yet there. */
6734 if (!sym
->f2k_derived
)
6735 sym
->f2k_derived
= gfc_get_namespace (NULL
, 0);
6737 if (extended
&& !sym
->components
)
6742 /* Add the extended derived type as the first component. */
6743 gfc_add_component (sym
, parent
, &p
);
6744 sym
->attr
.extension
= attr
.extension
;
6746 gfc_set_sym_referenced (extended
);
6748 p
->ts
.type
= BT_DERIVED
;
6749 p
->ts
.derived
= extended
;
6750 p
->initializer
= gfc_default_initializer (&p
->ts
);
6752 /* Provide the links between the extended type and its extension. */
6753 if (!extended
->f2k_derived
)
6754 extended
->f2k_derived
= gfc_get_namespace (NULL
, 0);
6755 st
= gfc_new_symtree (&extended
->f2k_derived
->sym_root
, sym
->name
);
6759 /* Take over the ABSTRACT attribute. */
6760 sym
->attr
.abstract
= attr
.abstract
;
6762 gfc_new_block
= sym
;
6768 /* Cray Pointees can be declared as:
6769 pointer (ipt, a (n,m,...,*))
6770 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6771 cheat and set a constant bound of 1 for the last dimension, if this
6772 is the case. Since there is no bounds-checking for Cray Pointees,
6773 this will be okay. */
6776 gfc_mod_pointee_as (gfc_array_spec
*as
)
6778 as
->cray_pointee
= true; /* This will be useful to know later. */
6779 if (as
->type
== AS_ASSUMED_SIZE
)
6781 as
->type
= AS_EXPLICIT
;
6782 as
->upper
[as
->rank
- 1] = gfc_int_expr (1);
6783 as
->cp_was_assumed
= true;
6785 else if (as
->type
== AS_ASSUMED_SHAPE
)
6787 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6794 /* Match the enum definition statement, here we are trying to match
6795 the first line of enum definition statement.
6796 Returns MATCH_YES if match is found. */
6799 gfc_match_enum (void)
6803 m
= gfc_match_eos ();
6807 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: ENUM and ENUMERATOR at %C")
6815 /* Returns an initializer whose value is one higher than the value of the
6816 LAST_INITIALIZER argument. If the argument is NULL, the
6817 initializers value will be set to zero. The initializer's kind
6818 will be set to gfc_c_int_kind.
6820 If -fshort-enums is given, the appropriate kind will be selected
6821 later after all enumerators have been parsed. A warning is issued
6822 here if an initializer exceeds gfc_c_int_kind. */
6825 enum_initializer (gfc_expr
*last_initializer
, locus where
)
6829 result
= gfc_get_expr ();
6830 result
->expr_type
= EXPR_CONSTANT
;
6831 result
->ts
.type
= BT_INTEGER
;
6832 result
->ts
.kind
= gfc_c_int_kind
;
6833 result
->where
= where
;
6835 mpz_init (result
->value
.integer
);
6837 if (last_initializer
!= NULL
)
6839 mpz_add_ui (result
->value
.integer
, last_initializer
->value
.integer
, 1);
6840 result
->where
= last_initializer
->where
;
6842 if (gfc_check_integer_range (result
->value
.integer
,
6843 gfc_c_int_kind
) != ARITH_OK
)
6845 gfc_error ("Enumerator exceeds the C integer type at %C");
6851 /* Control comes here, if it's the very first enumerator and no
6852 initializer has been given. It will be initialized to zero. */
6853 mpz_set_si (result
->value
.integer
, 0);
6860 /* Match a variable name with an optional initializer. When this
6861 subroutine is called, a variable is expected to be parsed next.
6862 Depending on what is happening at the moment, updates either the
6863 symbol table or the current interface. */
6866 enumerator_decl (void)
6868 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6869 gfc_expr
*initializer
;
6870 gfc_array_spec
*as
= NULL
;
6878 old_locus
= gfc_current_locus
;
6880 /* When we get here, we've just matched a list of attributes and
6881 maybe a type and a double colon. The next thing we expect to see
6882 is the name of the symbol. */
6883 m
= gfc_match_name (name
);
6887 var_locus
= gfc_current_locus
;
6889 /* OK, we've successfully matched the declaration. Now put the
6890 symbol in the current namespace. If we fail to create the symbol,
6892 if (build_sym (name
, NULL
, &as
, &var_locus
) == FAILURE
)
6898 /* The double colon must be present in order to have initializers.
6899 Otherwise the statement is ambiguous with an assignment statement. */
6902 if (gfc_match_char ('=') == MATCH_YES
)
6904 m
= gfc_match_init_expr (&initializer
);
6907 gfc_error ("Expected an initialization expression at %C");
6916 /* If we do not have an initializer, the initialization value of the
6917 previous enumerator (stored in last_initializer) is incremented
6918 by 1 and is used to initialize the current enumerator. */
6919 if (initializer
== NULL
)
6920 initializer
= enum_initializer (last_initializer
, old_locus
);
6922 if (initializer
== NULL
|| initializer
->ts
.type
!= BT_INTEGER
)
6924 gfc_error("ENUMERATOR %L not initialized with integer expression",
6927 gfc_free_enum_history ();
6931 /* Store this current initializer, for the next enumerator variable
6932 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6933 use last_initializer below. */
6934 last_initializer
= initializer
;
6935 t
= add_init_expr_to_sym (name
, &initializer
, &var_locus
);
6937 /* Maintain enumerator history. */
6938 gfc_find_symbol (name
, NULL
, 0, &sym
);
6939 create_enum_history (sym
, last_initializer
);
6941 return (t
== SUCCESS
) ? MATCH_YES
: MATCH_ERROR
;
6944 /* Free stuff up and return. */
6945 gfc_free_expr (initializer
);
6951 /* Match the enumerator definition statement. */
6954 gfc_match_enumerator_def (void)
6959 gfc_clear_ts (¤t_ts
);
6961 m
= gfc_match (" enumerator");
6965 m
= gfc_match (" :: ");
6966 if (m
== MATCH_ERROR
)
6969 colon_seen
= (m
== MATCH_YES
);
6971 if (gfc_current_state () != COMP_ENUM
)
6973 gfc_error ("ENUM definition statement expected before %C");
6974 gfc_free_enum_history ();
6978 (¤t_ts
)->type
= BT_INTEGER
;
6979 (¤t_ts
)->kind
= gfc_c_int_kind
;
6981 gfc_clear_attr (¤t_attr
);
6982 t
= gfc_add_flavor (¤t_attr
, FL_PARAMETER
, NULL
, NULL
);
6991 m
= enumerator_decl ();
6992 if (m
== MATCH_ERROR
)
6997 if (gfc_match_eos () == MATCH_YES
)
6999 if (gfc_match_char (',') != MATCH_YES
)
7003 if (gfc_current_state () == COMP_ENUM
)
7005 gfc_free_enum_history ();
7006 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7011 gfc_free_array_spec (current_as
);
7018 /* Match binding attributes. */
7021 match_binding_attributes (gfc_typebound_proc
* ba
, bool generic
, bool ppc
)
7023 bool found_passing
= false;
7024 bool seen_ptr
= false;
7027 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7028 this case the defaults are in there. */
7029 ba
->access
= ACCESS_UNKNOWN
;
7030 ba
->pass_arg
= NULL
;
7031 ba
->pass_arg_num
= 0;
7033 ba
->non_overridable
= 0;
7036 /* If we find a comma, we believe there are binding attributes. */
7037 if (gfc_match_char (',') == MATCH_NO
)
7039 ba
->access
= gfc_typebound_default_access
;
7045 /* Access specifier. */
7047 m
= gfc_match (" public");
7048 if (m
== MATCH_ERROR
)
7052 if (ba
->access
!= ACCESS_UNKNOWN
)
7054 gfc_error ("Duplicate access-specifier at %C");
7058 ba
->access
= ACCESS_PUBLIC
;
7062 m
= gfc_match (" private");
7063 if (m
== MATCH_ERROR
)
7067 if (ba
->access
!= ACCESS_UNKNOWN
)
7069 gfc_error ("Duplicate access-specifier at %C");
7073 ba
->access
= ACCESS_PRIVATE
;
7077 /* If inside GENERIC, the following is not allowed. */
7082 m
= gfc_match (" nopass");
7083 if (m
== MATCH_ERROR
)
7089 gfc_error ("Binding attributes already specify passing,"
7090 " illegal NOPASS at %C");
7094 found_passing
= true;
7099 /* PASS possibly including argument. */
7100 m
= gfc_match (" pass");
7101 if (m
== MATCH_ERROR
)
7105 char arg
[GFC_MAX_SYMBOL_LEN
+ 1];
7109 gfc_error ("Binding attributes already specify passing,"
7110 " illegal PASS at %C");
7114 m
= gfc_match (" ( %n )", arg
);
7115 if (m
== MATCH_ERROR
)
7118 ba
->pass_arg
= xstrdup (arg
);
7119 gcc_assert ((m
== MATCH_YES
) == (ba
->pass_arg
!= NULL
));
7121 found_passing
= true;
7129 m
= gfc_match (" pointer");
7130 if (m
== MATCH_ERROR
)
7136 gfc_error ("Duplicate POINTER attribute at %C");
7147 /* NON_OVERRIDABLE flag. */
7148 m
= gfc_match (" non_overridable");
7149 if (m
== MATCH_ERROR
)
7153 if (ba
->non_overridable
)
7155 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7159 ba
->non_overridable
= 1;
7163 /* DEFERRED flag. */
7164 m
= gfc_match (" deferred");
7165 if (m
== MATCH_ERROR
)
7171 gfc_error ("Duplicate DEFERRED at %C");
7182 /* Nothing matching found. */
7184 gfc_error ("Expected access-specifier at %C");
7186 gfc_error ("Expected binding attribute at %C");
7189 while (gfc_match_char (',') == MATCH_YES
);
7191 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7192 if (ba
->non_overridable
&& ba
->deferred
)
7194 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7198 if (ba
->access
== ACCESS_UNKNOWN
)
7199 ba
->access
= gfc_typebound_default_access
;
7201 if (ppc
&& !seen_ptr
)
7203 gfc_error ("POINTER attribute is required for procedure pointer component"
7211 gfc_free (ba
->pass_arg
);
7216 /* Match a PROCEDURE specific binding inside a derived type. */
7219 match_procedure_in_type (void)
7221 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7222 char target_buf
[GFC_MAX_SYMBOL_LEN
+ 1];
7223 char* target
= NULL
;
7224 gfc_typebound_proc
* tb
;
7232 /* Check current state. */
7233 gcc_assert (gfc_state_stack
->state
== COMP_DERIVED_CONTAINS
);
7234 block
= gfc_state_stack
->previous
->sym
;
7237 /* Try to match PROCEDURE(interface). */
7238 if (gfc_match (" (") == MATCH_YES
)
7240 m
= gfc_match_name (target_buf
);
7241 if (m
== MATCH_ERROR
)
7245 gfc_error ("Interface-name expected after '(' at %C");
7249 if (gfc_match (" )") != MATCH_YES
)
7251 gfc_error ("')' expected at %C");
7255 target
= target_buf
;
7258 /* Construct the data structure. */
7259 tb
= gfc_get_typebound_proc ();
7260 tb
->where
= gfc_current_locus
;
7263 /* Match binding attributes. */
7264 m
= match_binding_attributes (tb
, false, false);
7265 if (m
== MATCH_ERROR
)
7267 seen_attrs
= (m
== MATCH_YES
);
7269 /* Check that attribute DEFERRED is given iff an interface is specified, which
7270 means target != NULL. */
7271 if (tb
->deferred
&& !target
)
7273 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7276 if (target
&& !tb
->deferred
)
7278 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7282 /* Match the colons. */
7283 m
= gfc_match (" ::");
7284 if (m
== MATCH_ERROR
)
7286 seen_colons
= (m
== MATCH_YES
);
7287 if (seen_attrs
&& !seen_colons
)
7289 gfc_error ("Expected '::' after binding-attributes at %C");
7293 /* Match the binding name. */
7294 m
= gfc_match_name (name
);
7295 if (m
== MATCH_ERROR
)
7299 gfc_error ("Expected binding name at %C");
7303 /* Try to match the '=> target', if it's there. */
7304 m
= gfc_match (" =>");
7305 if (m
== MATCH_ERROR
)
7311 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7317 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7322 m
= gfc_match_name (target_buf
);
7323 if (m
== MATCH_ERROR
)
7327 gfc_error ("Expected binding target after '=>' at %C");
7330 target
= target_buf
;
7333 /* Now we should have the end. */
7334 m
= gfc_match_eos ();
7335 if (m
== MATCH_ERROR
)
7339 gfc_error ("Junk after PROCEDURE declaration at %C");
7343 /* If no target was found, it has the same name as the binding. */
7347 /* Get the namespace to insert the symbols into. */
7348 ns
= block
->f2k_derived
;
7351 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7352 if (tb
->deferred
&& !block
->attr
.abstract
)
7354 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7359 /* See if we already have a binding with this name in the symtree which would
7360 be an error. If a GENERIC already targetted this binding, it may be
7361 already there but then typebound is still NULL. */
7362 stree
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7363 if (stree
&& stree
->n
.tb
)
7365 gfc_error ("There's already a procedure with binding name '%s' for the"
7366 " derived type '%s' at %C", name
, block
->name
);
7370 /* Insert it and set attributes. */
7374 stree
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7379 if (gfc_get_sym_tree (target
, gfc_current_ns
, &tb
->u
.specific
))
7381 gfc_set_sym_referenced (tb
->u
.specific
->n
.sym
);
7387 /* Match a GENERIC procedure binding inside a derived type. */
7390 gfc_match_generic (void)
7392 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7394 gfc_typebound_proc tbattr
; /* Used for match_binding_attributes. */
7395 gfc_typebound_proc
* tb
;
7400 /* Check current state. */
7401 if (gfc_current_state () == COMP_DERIVED
)
7403 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7406 if (gfc_current_state () != COMP_DERIVED_CONTAINS
)
7408 block
= gfc_state_stack
->previous
->sym
;
7409 ns
= block
->f2k_derived
;
7410 gcc_assert (block
&& ns
);
7412 /* See if we get an access-specifier. */
7413 m
= match_binding_attributes (&tbattr
, true, false);
7414 if (m
== MATCH_ERROR
)
7417 /* Now the colons, those are required. */
7418 if (gfc_match (" ::") != MATCH_YES
)
7420 gfc_error ("Expected '::' at %C");
7424 /* The binding name and =>. */
7425 m
= gfc_match (" %n =>", name
);
7426 if (m
== MATCH_ERROR
)
7430 gfc_error ("Expected generic name at %C");
7434 /* If there's already something with this name, check that it is another
7435 GENERIC and then extend that rather than build a new node. */
7436 st
= gfc_find_symtree (ns
->tb_sym_root
, name
);
7439 gcc_assert (st
->n
.tb
);
7442 if (!tb
->is_generic
)
7444 gfc_error ("There's already a non-generic procedure with binding name"
7445 " '%s' for the derived type '%s' at %C",
7450 if (tb
->access
!= tbattr
.access
)
7452 gfc_error ("Binding at %C must have the same access as already"
7453 " defined binding '%s'", name
);
7459 st
= gfc_new_symtree (&ns
->tb_sym_root
, name
);
7462 st
->n
.tb
= tb
= gfc_get_typebound_proc ();
7463 tb
->where
= gfc_current_locus
;
7464 tb
->access
= tbattr
.access
;
7466 tb
->u
.generic
= NULL
;
7469 /* Now, match all following names as specific targets. */
7472 gfc_symtree
* target_st
;
7473 gfc_tbp_generic
* target
;
7475 m
= gfc_match_name (name
);
7476 if (m
== MATCH_ERROR
)
7480 gfc_error ("Expected specific binding name at %C");
7484 target_st
= gfc_get_tbp_symtree (&ns
->tb_sym_root
, name
);
7486 /* See if this is a duplicate specification. */
7487 for (target
= tb
->u
.generic
; target
; target
= target
->next
)
7488 if (target_st
== target
->specific_st
)
7490 gfc_error ("'%s' already defined as specific binding for the"
7491 " generic '%s' at %C", name
, st
->name
);
7495 target
= gfc_get_tbp_generic ();
7496 target
->specific_st
= target_st
;
7497 target
->specific
= NULL
;
7498 target
->next
= tb
->u
.generic
;
7499 tb
->u
.generic
= target
;
7501 while (gfc_match (" ,") == MATCH_YES
);
7503 /* Here should be the end. */
7504 if (gfc_match_eos () != MATCH_YES
)
7506 gfc_error ("Junk after GENERIC binding at %C");
7517 /* Match a FINAL declaration inside a derived type. */
7520 gfc_match_final_decl (void)
7522 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
7525 gfc_namespace
* module_ns
;
7529 if (gfc_state_stack
->state
!= COMP_DERIVED_CONTAINS
)
7531 gfc_error ("FINAL declaration at %C must be inside a derived type "
7532 "CONTAINS section");
7536 block
= gfc_state_stack
->previous
->sym
;
7539 if (!gfc_state_stack
->previous
|| !gfc_state_stack
->previous
->previous
7540 || gfc_state_stack
->previous
->previous
->state
!= COMP_MODULE
)
7542 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7543 " specification part of a MODULE");
7547 module_ns
= gfc_current_ns
;
7548 gcc_assert (module_ns
);
7549 gcc_assert (module_ns
->proc_name
->attr
.flavor
== FL_MODULE
);
7551 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7552 if (gfc_match (" ::") == MATCH_ERROR
)
7555 /* Match the sequence of procedure names. */
7562 if (first
&& gfc_match_eos () == MATCH_YES
)
7564 gfc_error ("Empty FINAL at %C");
7568 m
= gfc_match_name (name
);
7571 gfc_error ("Expected module procedure name at %C");
7574 else if (m
!= MATCH_YES
)
7577 if (gfc_match_eos () == MATCH_YES
)
7579 if (!last
&& gfc_match_char (',') != MATCH_YES
)
7581 gfc_error ("Expected ',' at %C");
7585 if (gfc_get_symbol (name
, module_ns
, &sym
))
7587 gfc_error ("Unknown procedure name \"%s\" at %C", name
);
7591 /* Mark the symbol as module procedure. */
7592 if (sym
->attr
.proc
!= PROC_MODULE
7593 && gfc_add_procedure (&sym
->attr
, PROC_MODULE
,
7594 sym
->name
, NULL
) == FAILURE
)
7597 /* Check if we already have this symbol in the list, this is an error. */
7598 for (f
= block
->f2k_derived
->finalizers
; f
; f
= f
->next
)
7599 if (f
->proc_sym
== sym
)
7601 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7606 /* Add this symbol to the list of finalizers. */
7607 gcc_assert (block
->f2k_derived
);
7609 f
= XCNEW (gfc_finalizer
);
7611 f
->proc_tree
= NULL
;
7612 f
->where
= gfc_current_locus
;
7613 f
->next
= block
->f2k_derived
->finalizers
;
7614 block
->f2k_derived
->finalizers
= f
;