1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts;
49 static symbol_attribute current_attr;
50 static gfc_array_spec *current_as;
51 static int colon_seen;
53 /* The current binding label (if any). */
54 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals = 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr *last_initializer;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr *initializer;
74 struct enumerator_history *next;
78 /* Header of enum history chain. */
80 static enumerator_history *enum_history = NULL;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history *max_enum = NULL;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol *gfc_new_block;
90 bool gfc_matching_function;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data = false;
98 gfc_in_match_data (void)
100 return in_match_data;
104 set_in_match_data (bool set_value)
106 in_match_data = set_value;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable *p)
114 gfc_data_variable *q;
119 gfc_free_expr (p->expr);
120 gfc_free_iterator (&p->iter, 0);
121 free_variable (p->list);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value *p)
137 gfc_free_expr (p->expr);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data *p)
153 free_variable (p->var);
154 free_value (p->value);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace *ns)
176 static match var_element (gfc_data_variable *);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable *parent)
184 gfc_data_variable *tail, var;
187 m = var_element (&var);
188 if (m == MATCH_ERROR)
193 tail = gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES)
203 m = gfc_match_iterator (&parent->iter, 1);
206 if (m == MATCH_ERROR)
209 m = var_element (&var);
210 if (m == MATCH_ERROR)
215 tail->next = gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES)
226 gfc_syntax_error (ST_DATA);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable *new_var)
240 memset (new_var, 0, sizeof (gfc_data_variable));
242 if (gfc_match_char ('(') == MATCH_YES)
243 return var_list (new_var);
245 m = gfc_match_variable (&new_var->expr, 0);
249 sym = new_var->expr->symtree->n.sym;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym, gfc_current_ns,
253 false, gfc_current_locus) == FAILURE)
256 if (!sym->attr.function && gfc_current_ns->parent
257 && gfc_current_ns->parent == sym->ns)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym->name);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym->attr.in_common
266 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym->name) == FAILURE)
271 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data *d)
283 gfc_data_variable var, *tail, *new_var;
290 m = var_element (&var);
293 if (m == MATCH_ERROR)
296 new_var = gfc_get_data_variable ();
302 tail->next = new_var;
306 if (gfc_match_char ('/') == MATCH_YES)
308 if (gfc_match_char (',') != MATCH_YES)
315 gfc_syntax_error (ST_DATA);
316 gfc_free_data_all (gfc_current_ns);
322 match_data_constant (gfc_expr **result)
324 char name[GFC_MAX_SYMBOL_LEN + 1];
330 m = gfc_match_literal_constant (&expr, 1);
337 if (m == MATCH_ERROR)
340 m = gfc_match_null (result);
344 old_loc = gfc_current_locus;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m = gfc_match_rvalue (result);
349 if (m == MATCH_ERROR)
352 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
354 if (gfc_simplify_expr (*result, 0) == FAILURE)
359 gfc_current_locus = old_loc;
361 m = gfc_match_name (name);
365 if (gfc_find_symbol (name, NULL, 1, &sym))
369 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym->attr.flavor == FL_DERIVED)
376 return gfc_match_structure_constructor (sym, result, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym->value->expr_type == EXPR_ARRAY)
381 gfc_current_locus = old_loc;
383 m = gfc_match_init_expr (result);
384 if (m == MATCH_ERROR)
389 if (gfc_simplify_expr (*result, 0) == FAILURE)
392 if ((*result)->expr_type == EXPR_CONSTANT)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name);
402 *result = gfc_copy_expr (sym->value);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data *data)
413 gfc_data_value *new_val, *tail;
421 m = match_data_constant (&expr);
424 if (m == MATCH_ERROR)
427 new_val = gfc_get_data_value ();
428 mpz_init (new_val->repeat);
431 data->value = new_val;
433 tail->next = new_val;
437 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
440 mpz_set_ui (tail->repeat, 1);
444 if (expr->ts.type == BT_INTEGER)
445 mpz_set (tail->repeat, expr->value.integer);
446 gfc_free_expr (expr);
448 m = match_data_constant (&tail->expr);
451 if (m == MATCH_ERROR)
455 if (gfc_match_char ('/') == MATCH_YES)
457 if (gfc_match_char (',') == MATCH_NO)
464 gfc_syntax_error (ST_DATA);
465 gfc_free_data_all (gfc_current_ns);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name, NULL, 0, &st);
484 newdata = gfc_get_data ();
485 newdata->var = gfc_get_data_variable ();
486 newdata->var->expr = gfc_get_variable_expr (st);
487 newdata->where = gfc_current_locus;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m = top_val_list (newdata);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
511 /* Chain in namespace list of DATA initializers. */
512 newdata->next = gfc_current_ns->data;
513 gfc_current_ns->data = newdata;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data = gfc_get_data ();
535 new_data->where = gfc_current_locus;
537 m = top_var_list (new_data);
541 m = top_val_list (new_data);
545 new_data->next = gfc_current_ns->data;
546 gfc_current_ns->data = new_data;
548 if (gfc_match_eos () == MATCH_YES)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data);
571 /************************ Declaration statements *********************/
573 /* Match an intent specification. Since this can only happen after an
574 INTENT word, a legal intent-spec must follow. */
577 match_intent_spec (void)
580 if (gfc_match (" ( in out )") == MATCH_YES)
582 if (gfc_match (" ( in )") == MATCH_YES)
584 if (gfc_match (" ( out )") == MATCH_YES)
587 gfc_error ("Bad INTENT specification at %C");
588 return INTENT_UNKNOWN;
592 /* Matches a character length specification, which is either a
593 specification expression or a '*'. */
596 char_len_param_value (gfc_expr **expr)
600 if (gfc_match_char ('*') == MATCH_YES)
606 m = gfc_match_expr (expr);
609 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
612 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
614 if ((*expr)->value.function.actual
615 && (*expr)->value.function.actual->expr->symtree)
618 e = (*expr)->value.function.actual->expr;
619 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
620 && e->expr_type == EXPR_VARIABLE)
622 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
624 if (e->symtree->n.sym->ts.type == BT_CHARACTER
625 && e->symtree->n.sym->ts.u.cl
626 && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN)
634 gfc_error ("Conflict in attributes of function argument at %C");
639 /* A character length is a '*' followed by a literal integer or a
640 char_len_param_value in parenthesis. */
643 match_char_length (gfc_expr **expr)
648 m = gfc_match_char ('*');
652 m = gfc_match_small_literal_int (&length, NULL);
653 if (m == MATCH_ERROR)
658 if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
659 "Old-style character length at %C") == FAILURE)
661 *expr = gfc_int_expr (length);
665 if (gfc_match_char ('(') == MATCH_NO)
668 m = char_len_param_value (expr);
669 if (m != MATCH_YES && gfc_matching_function)
675 if (m == MATCH_ERROR)
680 if (gfc_match_char (')') == MATCH_NO)
682 gfc_free_expr (*expr);
690 gfc_error ("Syntax error in character length specification at %C");
695 /* Special subroutine for finding a symbol. Check if the name is found
696 in the current name space. If not, and we're compiling a function or
697 subroutine and the parent compilation unit is an interface, then check
698 to see if the name we've been given is the name of the interface
699 (located in another namespace). */
702 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
708 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
711 *result = st ? st->n.sym : NULL;
715 if (gfc_current_state () != COMP_SUBROUTINE
716 && gfc_current_state () != COMP_FUNCTION)
719 s = gfc_state_stack->previous;
723 if (s->state != COMP_INTERFACE)
726 goto end; /* Nameless interface. */
728 if (strcmp (name, s->sym->name) == 0)
739 /* Special subroutine for getting a symbol node associated with a
740 procedure name, used in SUBROUTINE and FUNCTION statements. The
741 symbol is created in the parent using with symtree node in the
742 child unit pointing to the symbol. If the current namespace has no
743 parent, then the symbol is just created in the current unit. */
746 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
752 /* Module functions have to be left in their own namespace because
753 they have potentially (almost certainly!) already been referenced.
754 In this sense, they are rather like external functions. This is
755 fixed up in resolve.c(resolve_entries), where the symbol name-
756 space is set to point to the master function, so that the fake
757 result mechanism can work. */
758 if (module_fcn_entry)
760 /* Present if entry is declared to be a module procedure. */
761 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
764 rc = gfc_get_symbol (name, NULL, result);
765 else if (!gfc_get_symbol (name, NULL, &sym) && sym
766 && (*result)->ts.type == BT_UNKNOWN
767 && sym->attr.flavor == FL_UNKNOWN)
768 /* Pick up the typespec for the entry, if declared in the function
769 body. Note that this symbol is FL_UNKNOWN because it will
770 only have appeared in a type declaration. The local symtree
771 is set to point to the module symbol and a unique symtree
772 to the local version. This latter ensures a correct clearing
775 /* If the ENTRY proceeds its specification, we need to ensure
776 that this does not raise a "has no IMPLICIT type" error. */
777 if (sym->ts.type == BT_UNKNOWN)
778 sym->attr.untyped = 1;
780 (*result)->ts = sym->ts;
782 /* Put the symbol in the procedure namespace so that, should
783 the ENTRY precede its specification, the specification
785 (*result)->ns = gfc_current_ns;
787 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
789 st = gfc_get_unique_symtree (gfc_current_ns);
794 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
800 gfc_current_ns->refs++;
802 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
804 /* Trap another encompassed procedure with the same name. All
805 these conditions are necessary to avoid picking up an entry
806 whose name clashes with that of the encompassing procedure;
807 this is handled using gsymbols to register unique,globally
809 if (sym->attr.flavor != 0
810 && sym->attr.proc != 0
811 && (sym->attr.subroutine || sym->attr.function)
812 && sym->attr.if_source != IFSRC_UNKNOWN)
813 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
814 name, &sym->declared_at);
816 /* Trap a procedure with a name the same as interface in the
817 encompassing scope. */
818 if (sym->attr.generic != 0
819 && (sym->attr.subroutine || sym->attr.function)
820 && !sym->attr.mod_proc)
821 gfc_error_now ("Name '%s' at %C is already defined"
822 " as a generic interface at %L",
823 name, &sym->declared_at);
825 /* Trap declarations of attributes in encompassing scope. The
826 signature for this is that ts.kind is set. Legitimate
827 references only set ts.type. */
828 if (sym->ts.kind != 0
829 && !sym->attr.implicit_type
830 && sym->attr.proc == 0
831 && gfc_current_ns->parent != NULL
832 && sym->attr.access == 0
833 && !module_fcn_entry)
834 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
835 "and must not have attributes declared at %L",
836 name, &sym->declared_at);
839 if (gfc_current_ns->parent == NULL || *result == NULL)
842 /* Module function entries will already have a symtree in
843 the current namespace but will need one at module level. */
844 if (module_fcn_entry)
846 /* Present if entry is declared to be a module procedure. */
847 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
849 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
852 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
857 /* See if the procedure should be a module procedure. */
859 if (((sym->ns->proc_name != NULL
860 && sym->ns->proc_name->attr.flavor == FL_MODULE
861 && sym->attr.proc != PROC_MODULE)
862 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
863 && gfc_add_procedure (&sym->attr, PROC_MODULE,
864 sym->name, NULL) == FAILURE)
871 /* Verify that the given symbol representing a parameter is C
872 interoperable, by checking to see if it was marked as such after
873 its declaration. If the given symbol is not interoperable, a
874 warning is reported, thus removing the need to return the status to
875 the calling function. The standard does not require the user use
876 one of the iso_c_binding named constants to declare an
877 interoperable parameter, but we can't be sure if the param is C
878 interop or not if the user doesn't. For example, integer(4) may be
879 legal Fortran, but doesn't have meaning in C. It may interop with
880 a number of the C types, which causes a problem because the
881 compiler can't know which one. This code is almost certainly not
882 portable, and the user will get what they deserve if the C type
883 across platforms isn't always interoperable with integer(4). If
884 the user had used something like integer(c_int) or integer(c_long),
885 the compiler could have automatically handled the varying sizes
889 verify_c_interop_param (gfc_symbol *sym)
891 int is_c_interop = 0;
892 gfc_try retval = SUCCESS;
894 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
895 Don't repeat the checks here. */
896 if (sym->attr.implicit_type)
899 /* For subroutines or functions that are passed to a BIND(C) procedure,
900 they're interoperable if they're BIND(C) and their params are all
902 if (sym->attr.flavor == FL_PROCEDURE)
904 if (sym->attr.is_bind_c == 0)
906 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
907 "attribute to be C interoperable", sym->name,
908 &(sym->declared_at));
914 if (sym->attr.is_c_interop == 1)
915 /* We've already checked this procedure; don't check it again. */
918 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
923 /* See if we've stored a reference to a procedure that owns sym. */
924 if (sym->ns != NULL && sym->ns->proc_name != NULL)
926 if (sym->ns->proc_name->attr.is_bind_c == 1)
929 (verify_c_interop (&(sym->ts))
932 if (is_c_interop != 1)
934 /* Make personalized messages to give better feedback. */
935 if (sym->ts.type == BT_DERIVED)
936 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
937 " procedure '%s' but is not C interoperable "
938 "because derived type '%s' is not C interoperable",
939 sym->name, &(sym->declared_at),
940 sym->ns->proc_name->name,
941 sym->ts.u.derived->name);
943 gfc_warning ("Variable '%s' at %L is a parameter to the "
944 "BIND(C) procedure '%s' but may not be C "
946 sym->name, &(sym->declared_at),
947 sym->ns->proc_name->name);
950 /* Character strings are only C interoperable if they have a
952 if (sym->ts.type == BT_CHARACTER)
954 gfc_charlen *cl = sym->ts.u.cl;
955 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
956 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
958 gfc_error ("Character argument '%s' at %L "
959 "must be length 1 because "
960 "procedure '%s' is BIND(C)",
961 sym->name, &sym->declared_at,
962 sym->ns->proc_name->name);
967 /* We have to make sure that any param to a bind(c) routine does
968 not have the allocatable, pointer, or optional attributes,
969 according to J3/04-007, section 5.1. */
970 if (sym->attr.allocatable == 1)
972 gfc_error ("Variable '%s' at %L cannot have the "
973 "ALLOCATABLE attribute because procedure '%s'"
974 " is BIND(C)", sym->name, &(sym->declared_at),
975 sym->ns->proc_name->name);
979 if (sym->attr.pointer == 1)
981 gfc_error ("Variable '%s' at %L cannot have the "
982 "POINTER attribute because procedure '%s'"
983 " is BIND(C)", sym->name, &(sym->declared_at),
984 sym->ns->proc_name->name);
988 if (sym->attr.optional == 1)
990 gfc_error ("Variable '%s' at %L cannot have the "
991 "OPTIONAL attribute because procedure '%s'"
992 " is BIND(C)", sym->name, &(sym->declared_at),
993 sym->ns->proc_name->name);
997 /* Make sure that if it has the dimension attribute, that it is
998 either assumed size or explicit shape. */
1001 if (sym->as->type == AS_ASSUMED_SHAPE)
1003 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1004 "argument to the procedure '%s' at %L because "
1005 "the procedure is BIND(C)", sym->name,
1006 &(sym->declared_at), sym->ns->proc_name->name,
1007 &(sym->ns->proc_name->declared_at));
1011 if (sym->as->type == AS_DEFERRED)
1013 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1014 "argument to the procedure '%s' at %L because "
1015 "the procedure is BIND(C)", sym->name,
1016 &(sym->declared_at), sym->ns->proc_name->name,
1017 &(sym->ns->proc_name->declared_at));
1028 /* Build a polymorphic CLASS entity, using the symbol that comes from build_sym.
1029 A CLASS entity is represented by an encapsulating type, which contains the
1030 declared type as '$data' component, plus an integer component '$vindex'
1031 which determines the dynamic type. */
1034 encapsulate_class_symbol (gfc_typespec *ts, symbol_attribute *attr,
1035 gfc_array_spec **as)
1037 char name[GFC_MAX_SYMBOL_LEN + 5];
1041 /* Determine the name of the encapsulating type. */
1042 if ((*as) && (*as)->rank && attr->allocatable)
1043 sprintf (name, ".class.%s.%d.a", ts->u.derived->name, (*as)->rank);
1044 else if ((*as) && (*as)->rank)
1045 sprintf (name, ".class.%s.%d", ts->u.derived->name, (*as)->rank);
1046 else if (attr->allocatable)
1047 sprintf (name, ".class.%s.a", ts->u.derived->name);
1049 sprintf (name, ".class.%s", ts->u.derived->name);
1051 gfc_find_symbol (name, ts->u.derived->ns, 0, &fclass);
1055 /* If not there, create a new symbol. */
1056 fclass = gfc_new_symbol (name, ts->u.derived->ns);
1057 st = gfc_new_symtree (&ts->u.derived->ns->sym_root, name);
1059 gfc_set_sym_referenced (fclass);
1061 fclass->ts.type = BT_UNKNOWN;
1062 fclass->vindex = ts->u.derived->vindex;
1063 fclass->attr.abstract = ts->u.derived->attr.abstract;
1064 if (ts->u.derived->f2k_derived)
1065 fclass->f2k_derived = gfc_get_namespace (NULL, 0);
1066 if (gfc_add_flavor (&fclass->attr, FL_DERIVED,
1067 NULL, &gfc_current_locus) == FAILURE)
1070 /* Add component '$data'. */
1071 if (gfc_add_component (fclass, "$data", &c) == FAILURE)
1074 c->ts.type = BT_DERIVED;
1075 c->attr.access = ACCESS_PRIVATE;
1076 c->ts.u.derived = ts->u.derived;
1077 c->attr.pointer = attr->pointer || attr->dummy;
1078 c->attr.allocatable = attr->allocatable;
1079 c->attr.dimension = attr->dimension;
1080 c->attr.abstract = ts->u.derived->attr.abstract;
1082 c->initializer = gfc_get_expr ();
1083 c->initializer->expr_type = EXPR_NULL;
1085 /* Add component '$vindex'. */
1086 if (gfc_add_component (fclass, "$vindex", &c) == FAILURE)
1088 c->ts.type = BT_INTEGER;
1090 c->attr.access = ACCESS_PRIVATE;
1091 c->initializer = gfc_int_expr (0);
1094 fclass->attr.extension = 1;
1095 fclass->attr.is_class = 1;
1096 ts->u.derived = fclass;
1097 attr->allocatable = attr->pointer = attr->dimension = 0;
1098 (*as) = NULL; /* XXX */
1102 /* Function called by variable_decl() that adds a name to the symbol table. */
1105 build_sym (const char *name, gfc_charlen *cl,
1106 gfc_array_spec **as, locus *var_locus)
1108 symbol_attribute attr;
1111 if (gfc_get_symbol (name, NULL, &sym))
1114 /* Start updating the symbol table. Add basic type attribute if present. */
1115 if (current_ts.type != BT_UNKNOWN
1116 && (sym->attr.implicit_type == 0
1117 || !gfc_compare_types (&sym->ts, ¤t_ts))
1118 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1121 if (sym->ts.type == BT_CHARACTER)
1124 /* Add dimension attribute if present. */
1125 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1129 /* Add attribute to symbol. The copy is so that we can reset the
1130 dimension attribute. */
1131 attr = current_attr;
1134 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1137 /* Finish any work that may need to be done for the binding label,
1138 if it's a bind(c). The bind(c) attr is found before the symbol
1139 is made, and before the symbol name (for data decls), so the
1140 current_ts is holding the binding label, or nothing if the
1141 name= attr wasn't given. Therefore, test here if we're dealing
1142 with a bind(c) and make sure the binding label is set correctly. */
1143 if (sym->attr.is_bind_c == 1)
1145 if (sym->binding_label[0] == '\0')
1147 /* Set the binding label and verify that if a NAME= was specified
1148 then only one identifier was in the entity-decl-list. */
1149 if (set_binding_label (sym->binding_label, sym->name,
1150 num_idents_on_line) == FAILURE)
1155 /* See if we know we're in a common block, and if it's a bind(c)
1156 common then we need to make sure we're an interoperable type. */
1157 if (sym->attr.in_common == 1)
1159 /* Test the common block object. */
1160 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1161 && sym->ts.is_c_interop != 1)
1163 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1164 "must be declared with a C interoperable "
1165 "kind since common block '%s' is BIND(C)",
1166 sym->name, sym->common_block->name,
1167 sym->common_block->name);
1172 sym->attr.implied_index = 0;
1174 if (sym->ts.type == BT_CLASS)
1175 encapsulate_class_symbol (&sym->ts, &sym->attr, &sym->as);
1181 /* Set character constant to the given length. The constant will be padded or
1182 truncated. If we're inside an array constructor without a typespec, we
1183 additionally check that all elements have the same length; check_len -1
1184 means no checking. */
1187 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1192 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1193 gcc_assert (expr->ts.type == BT_CHARACTER);
1195 slen = expr->value.character.length;
1198 s = gfc_get_wide_string (len + 1);
1199 memcpy (s, expr->value.character.string,
1200 MIN (len, slen) * sizeof (gfc_char_t));
1202 gfc_wide_memset (&s[slen], ' ', len - slen);
1204 if (gfc_option.warn_character_truncation && slen > len)
1205 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1206 "(%d/%d)", &expr->where, slen, len);
1208 /* Apply the standard by 'hand' otherwise it gets cleared for
1210 if (check_len != -1 && slen != check_len
1211 && !(gfc_option.allow_std & GFC_STD_GNU))
1212 gfc_error_now ("The CHARACTER elements of the array constructor "
1213 "at %L must have the same length (%d/%d)",
1214 &expr->where, slen, check_len);
1217 gfc_free (expr->value.character.string);
1218 expr->value.character.string = s;
1219 expr->value.character.length = len;
1224 /* Function to create and update the enumerator history
1225 using the information passed as arguments.
1226 Pointer "max_enum" is also updated, to point to
1227 enum history node containing largest initializer.
1229 SYM points to the symbol node of enumerator.
1230 INIT points to its enumerator value. */
1233 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1235 enumerator_history *new_enum_history;
1236 gcc_assert (sym != NULL && init != NULL);
1238 new_enum_history = XCNEW (enumerator_history);
1240 new_enum_history->sym = sym;
1241 new_enum_history->initializer = init;
1242 new_enum_history->next = NULL;
1244 if (enum_history == NULL)
1246 enum_history = new_enum_history;
1247 max_enum = enum_history;
1251 new_enum_history->next = enum_history;
1252 enum_history = new_enum_history;
1254 if (mpz_cmp (max_enum->initializer->value.integer,
1255 new_enum_history->initializer->value.integer) < 0)
1256 max_enum = new_enum_history;
1261 /* Function to free enum kind history. */
1264 gfc_free_enum_history (void)
1266 enumerator_history *current = enum_history;
1267 enumerator_history *next;
1269 while (current != NULL)
1271 next = current->next;
1276 enum_history = NULL;
1280 /* Function called by variable_decl() that adds an initialization
1281 expression to a symbol. */
1284 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1286 symbol_attribute attr;
1291 if (find_special (name, &sym, false))
1296 /* If this symbol is confirming an implicit parameter type,
1297 then an initialization expression is not allowed. */
1298 if (attr.flavor == FL_PARAMETER
1299 && sym->value != NULL
1302 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1309 /* An initializer is required for PARAMETER declarations. */
1310 if (attr.flavor == FL_PARAMETER)
1312 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1318 /* If a variable appears in a DATA block, it cannot have an
1322 gfc_error ("Variable '%s' at %C with an initializer already "
1323 "appears in a DATA statement", sym->name);
1327 /* Check if the assignment can happen. This has to be put off
1328 until later for a derived type variable. */
1329 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1330 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1331 && gfc_check_assign_symbol (sym, init) == FAILURE)
1334 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1335 && init->ts.type == BT_CHARACTER)
1337 /* Update symbol character length according initializer. */
1338 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1341 if (sym->ts.u.cl->length == NULL)
1344 /* If there are multiple CHARACTER variables declared on the
1345 same line, we don't want them to share the same length. */
1346 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1348 if (sym->attr.flavor == FL_PARAMETER)
1350 if (init->expr_type == EXPR_CONSTANT)
1352 clen = init->value.character.length;
1353 sym->ts.u.cl->length = gfc_int_expr (clen);
1355 else if (init->expr_type == EXPR_ARRAY)
1357 gfc_expr *p = init->value.constructor->expr;
1358 clen = p->value.character.length;
1359 sym->ts.u.cl->length = gfc_int_expr (clen);
1361 else if (init->ts.u.cl && init->ts.u.cl->length)
1362 sym->ts.u.cl->length =
1363 gfc_copy_expr (sym->value->ts.u.cl->length);
1366 /* Update initializer character length according symbol. */
1367 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1369 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1370 gfc_constructor * p;
1372 if (init->expr_type == EXPR_CONSTANT)
1373 gfc_set_constant_character_len (len, init, -1);
1374 else if (init->expr_type == EXPR_ARRAY)
1376 /* Build a new charlen to prevent simplification from
1377 deleting the length before it is resolved. */
1378 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1379 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1381 for (p = init->value.constructor; p; p = p->next)
1382 gfc_set_constant_character_len (len, p->expr, -1);
1387 /* Need to check if the expression we initialized this
1388 to was one of the iso_c_binding named constants. If so,
1389 and we're a parameter (constant), let it be iso_c.
1391 integer(c_int), parameter :: my_int = c_int
1392 integer(my_int) :: my_int_2
1393 If we mark my_int as iso_c (since we can see it's value
1394 is equal to one of the named constants), then my_int_2
1395 will be considered C interoperable. */
1396 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1398 sym->ts.is_iso_c |= init->ts.is_iso_c;
1399 sym->ts.is_c_interop |= init->ts.is_c_interop;
1400 /* attr bits needed for module files. */
1401 sym->attr.is_iso_c |= init->ts.is_iso_c;
1402 sym->attr.is_c_interop |= init->ts.is_c_interop;
1403 if (init->ts.is_iso_c)
1404 sym->ts.f90_type = init->ts.f90_type;
1407 /* Add initializer. Make sure we keep the ranks sane. */
1408 if (sym->attr.dimension && init->rank == 0)
1414 if (sym->attr.flavor == FL_PARAMETER
1415 && init->expr_type == EXPR_CONSTANT
1416 && spec_size (sym->as, &size) == SUCCESS
1417 && mpz_cmp_si (size, 0) > 0)
1419 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1422 array->value.constructor = c = NULL;
1423 for (n = 0; n < (int)mpz_get_si (size); n++)
1425 if (array->value.constructor == NULL)
1427 array->value.constructor = c = gfc_get_constructor ();
1432 c->next = gfc_get_constructor ();
1434 c->expr = gfc_copy_expr (init);
1438 array->shape = gfc_get_shape (sym->as->rank);
1439 for (n = 0; n < sym->as->rank; n++)
1440 spec_dimen_size (sym->as, n, &array->shape[n]);
1445 init->rank = sym->as->rank;
1449 if (sym->attr.save == SAVE_NONE)
1450 sym->attr.save = SAVE_IMPLICIT;
1458 /* Function called by variable_decl() that adds a name to a structure
1462 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1463 gfc_array_spec **as)
1467 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1468 constructing, it must have the pointer attribute. */
1469 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1470 && current_ts.u.derived == gfc_current_block ()
1471 && current_attr.pointer == 0)
1473 gfc_error ("Component at %C must have the POINTER attribute");
1477 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1479 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1481 gfc_error ("Array component of structure at %C must have explicit "
1482 "or deferred shape");
1487 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1491 if (c->ts.type == BT_CHARACTER)
1493 c->attr = current_attr;
1495 c->initializer = *init;
1500 c->attr.dimension = 1;
1503 /* Should this ever get more complicated, combine with similar section
1504 in add_init_expr_to_sym into a separate function. */
1505 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1506 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1510 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1511 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1512 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1514 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1516 if (c->initializer->expr_type == EXPR_CONSTANT)
1517 gfc_set_constant_character_len (len, c->initializer, -1);
1518 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1519 c->initializer->ts.u.cl->length->value.integer))
1522 gfc_constructor *ctor = c->initializer->value.constructor;
1524 has_ts = (c->initializer->ts.u.cl
1525 && c->initializer->ts.u.cl->length_from_typespec);
1531 /* Remember the length of the first element for checking
1532 that all elements *in the constructor* have the same
1533 length. This need not be the length of the LHS! */
1534 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1535 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1536 first_len = ctor->expr->value.character.length;
1538 for (; ctor; ctor = ctor->next)
1540 if (ctor->expr->expr_type == EXPR_CONSTANT)
1541 gfc_set_constant_character_len (len, ctor->expr,
1542 has_ts ? -1 : first_len);
1548 if (c->ts.type == BT_CLASS)
1549 encapsulate_class_symbol (&c->ts, &c->attr, &c->as);
1551 /* Check array components. */
1552 if (!c->attr.dimension)
1555 if (c->attr.pointer)
1557 if (c->as->type != AS_DEFERRED)
1559 gfc_error ("Pointer array component of structure at %C must have a "
1564 else if (c->attr.allocatable)
1566 if (c->as->type != AS_DEFERRED)
1568 gfc_error ("Allocatable component of structure at %C must have a "
1575 if (c->as->type != AS_EXPLICIT)
1577 gfc_error ("Array component of structure at %C must have an "
1587 /* Match a 'NULL()', and possibly take care of some side effects. */
1590 gfc_match_null (gfc_expr **result)
1596 m = gfc_match (" null ( )");
1600 /* The NULL symbol now has to be/become an intrinsic function. */
1601 if (gfc_get_symbol ("null", NULL, &sym))
1603 gfc_error ("NULL() initialization at %C is ambiguous");
1607 gfc_intrinsic_symbol (sym);
1609 if (sym->attr.proc != PROC_INTRINSIC
1610 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1611 sym->name, NULL) == FAILURE
1612 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1615 e = gfc_get_expr ();
1616 e->where = gfc_current_locus;
1617 e->expr_type = EXPR_NULL;
1618 e->ts.type = BT_UNKNOWN;
1626 /* Match a variable name with an optional initializer. When this
1627 subroutine is called, a variable is expected to be parsed next.
1628 Depending on what is happening at the moment, updates either the
1629 symbol table or the current interface. */
1632 variable_decl (int elem)
1634 char name[GFC_MAX_SYMBOL_LEN + 1];
1635 gfc_expr *initializer, *char_len;
1637 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1648 old_locus = gfc_current_locus;
1650 /* When we get here, we've just matched a list of attributes and
1651 maybe a type and a double colon. The next thing we expect to see
1652 is the name of the symbol. */
1653 m = gfc_match_name (name);
1657 var_locus = gfc_current_locus;
1659 /* Now we could see the optional array spec. or character length. */
1660 m = gfc_match_array_spec (&as);
1661 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1662 cp_as = gfc_copy_array_spec (as);
1663 else if (m == MATCH_ERROR)
1667 as = gfc_copy_array_spec (current_as);
1672 if (current_ts.type == BT_CHARACTER)
1674 switch (match_char_length (&char_len))
1677 cl = gfc_new_charlen (gfc_current_ns, NULL);
1679 cl->length = char_len;
1682 /* Non-constant lengths need to be copied after the first
1683 element. Also copy assumed lengths. */
1686 && (current_ts.u.cl->length == NULL
1687 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1689 cl = gfc_new_charlen (gfc_current_ns, NULL);
1690 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1693 cl = current_ts.u.cl;
1702 /* If this symbol has already shown up in a Cray Pointer declaration,
1703 then we want to set the type & bail out. */
1704 if (gfc_option.flag_cray_pointer)
1706 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1707 if (sym != NULL && sym->attr.cray_pointee)
1709 sym->ts.type = current_ts.type;
1710 sym->ts.kind = current_ts.kind;
1712 sym->ts.u.derived = current_ts.u.derived;
1713 sym->ts.is_c_interop = current_ts.is_c_interop;
1714 sym->ts.is_iso_c = current_ts.is_iso_c;
1717 /* Check to see if we have an array specification. */
1720 if (sym->as != NULL)
1722 gfc_error ("Duplicate array spec for Cray pointee at %C");
1723 gfc_free_array_spec (cp_as);
1729 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1730 gfc_internal_error ("Couldn't set pointee array spec.");
1732 /* Fix the array spec. */
1733 m = gfc_mod_pointee_as (sym->as);
1734 if (m == MATCH_ERROR)
1742 gfc_free_array_spec (cp_as);
1746 /* Procedure pointer as function result. */
1747 if (gfc_current_state () == COMP_FUNCTION
1748 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1749 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1750 strcpy (name, "ppr@");
1752 if (gfc_current_state () == COMP_FUNCTION
1753 && strcmp (name, gfc_current_block ()->name) == 0
1754 && gfc_current_block ()->result
1755 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1756 strcpy (name, "ppr@");
1758 /* OK, we've successfully matched the declaration. Now put the
1759 symbol in the current namespace, because it might be used in the
1760 optional initialization expression for this symbol, e.g. this is
1763 integer, parameter :: i = huge(i)
1765 This is only true for parameters or variables of a basic type.
1766 For components of derived types, it is not true, so we don't
1767 create a symbol for those yet. If we fail to create the symbol,
1769 if (gfc_current_state () != COMP_DERIVED
1770 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1776 /* An interface body specifies all of the procedure's
1777 characteristics and these shall be consistent with those
1778 specified in the procedure definition, except that the interface
1779 may specify a procedure that is not pure if the procedure is
1780 defined to be pure(12.3.2). */
1781 if (current_ts.type == BT_DERIVED
1782 && gfc_current_ns->proc_name
1783 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1784 && current_ts.u.derived->ns != gfc_current_ns)
1787 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1788 if (!(current_ts.u.derived->attr.imported
1790 && st->n.sym == current_ts.u.derived)
1791 && !gfc_current_ns->has_import_set)
1793 gfc_error ("the type of '%s' at %C has not been declared within the "
1800 /* In functions that have a RESULT variable defined, the function
1801 name always refers to function calls. Therefore, the name is
1802 not allowed to appear in specification statements. */
1803 if (gfc_current_state () == COMP_FUNCTION
1804 && gfc_current_block () != NULL
1805 && gfc_current_block ()->result != NULL
1806 && gfc_current_block ()->result != gfc_current_block ()
1807 && strcmp (gfc_current_block ()->name, name) == 0)
1809 gfc_error ("Function name '%s' not allowed at %C", name);
1814 /* We allow old-style initializations of the form
1815 integer i /2/, j(4) /3*3, 1/
1816 (if no colon has been seen). These are different from data
1817 statements in that initializers are only allowed to apply to the
1818 variable immediately preceding, i.e.
1820 is not allowed. Therefore we have to do some work manually, that
1821 could otherwise be left to the matchers for DATA statements. */
1823 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1825 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1826 "initialization at %C") == FAILURE)
1829 return match_old_style_init (name);
1832 /* The double colon must be present in order to have initializers.
1833 Otherwise the statement is ambiguous with an assignment statement. */
1836 if (gfc_match (" =>") == MATCH_YES)
1838 if (!current_attr.pointer)
1840 gfc_error ("Initialization at %C isn't for a pointer variable");
1845 m = gfc_match_null (&initializer);
1848 gfc_error ("Pointer initialization requires a NULL() at %C");
1852 if (gfc_pure (NULL))
1854 gfc_error ("Initialization of pointer at %C is not allowed in "
1855 "a PURE procedure");
1863 else if (gfc_match_char ('=') == MATCH_YES)
1865 if (current_attr.pointer)
1867 gfc_error ("Pointer initialization at %C requires '=>', "
1873 m = gfc_match_init_expr (&initializer);
1876 gfc_error ("Expected an initialization expression at %C");
1880 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1882 gfc_error ("Initialization of variable at %C is not allowed in "
1883 "a PURE procedure");
1892 if (initializer != NULL && current_attr.allocatable
1893 && gfc_current_state () == COMP_DERIVED)
1895 gfc_error ("Initialization of allocatable component at %C is not "
1901 /* Add the initializer. Note that it is fine if initializer is
1902 NULL here, because we sometimes also need to check if a
1903 declaration *must* have an initialization expression. */
1904 if (gfc_current_state () != COMP_DERIVED)
1905 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1908 if (current_ts.type == BT_DERIVED
1909 && !current_attr.pointer && !initializer)
1910 initializer = gfc_default_initializer (¤t_ts);
1911 t = build_struct (name, cl, &initializer, &as);
1914 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1917 /* Free stuff up and return. */
1918 gfc_free_expr (initializer);
1919 gfc_free_array_spec (as);
1925 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1926 This assumes that the byte size is equal to the kind number for
1927 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1930 gfc_match_old_kind_spec (gfc_typespec *ts)
1935 if (gfc_match_char ('*') != MATCH_YES)
1938 m = gfc_match_small_literal_int (&ts->kind, NULL);
1942 original_kind = ts->kind;
1944 /* Massage the kind numbers for complex types. */
1945 if (ts->type == BT_COMPLEX)
1949 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1950 gfc_basic_typename (ts->type), original_kind);
1956 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1958 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1959 gfc_basic_typename (ts->type), original_kind);
1963 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1964 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1971 /* Match a kind specification. Since kinds are generally optional, we
1972 usually return MATCH_NO if something goes wrong. If a "kind="
1973 string is found, then we know we have an error. */
1976 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1988 where = loc = gfc_current_locus;
1993 if (gfc_match_char ('(') == MATCH_NO)
1996 /* Also gobbles optional text. */
1997 if (gfc_match (" kind = ") == MATCH_YES)
2000 loc = gfc_current_locus;
2003 n = gfc_match_init_expr (&e);
2007 if (gfc_matching_function)
2009 /* The function kind expression might include use associated or
2010 imported parameters and try again after the specification
2012 if (gfc_match_char (')') != MATCH_YES)
2014 gfc_error ("Missing right parenthesis at %C");
2020 gfc_undo_symbols ();
2025 /* ....or else, the match is real. */
2027 gfc_error ("Expected initialization expression at %C");
2035 gfc_error ("Expected scalar initialization expression at %C");
2040 msg = gfc_extract_int (e, &ts->kind);
2049 /* Before throwing away the expression, let's see if we had a
2050 C interoperable kind (and store the fact). */
2051 if (e->ts.is_c_interop == 1)
2053 /* Mark this as c interoperable if being declared with one
2054 of the named constants from iso_c_binding. */
2055 ts->is_c_interop = e->ts.is_iso_c;
2056 ts->f90_type = e->ts.f90_type;
2062 /* Ignore errors to this point, if we've gotten here. This means
2063 we ignore the m=MATCH_ERROR from above. */
2064 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
2066 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2067 gfc_basic_typename (ts->type));
2068 gfc_current_locus = where;
2072 /* Warn if, e.g., c_int is used for a REAL variable, but not
2073 if, e.g., c_double is used for COMPLEX as the standard
2074 explicitly says that the kind type parameter for complex and real
2075 variable is the same, i.e. c_float == c_float_complex. */
2076 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2077 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2078 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2079 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2080 "is %s", gfc_basic_typename (ts->f90_type), &where,
2081 gfc_basic_typename (ts->type));
2083 gfc_gobble_whitespace ();
2084 if ((c = gfc_next_ascii_char ()) != ')'
2085 && (ts->type != BT_CHARACTER || c != ','))
2087 if (ts->type == BT_CHARACTER)
2088 gfc_error ("Missing right parenthesis or comma at %C");
2090 gfc_error ("Missing right parenthesis at %C");
2094 /* All tests passed. */
2097 if(m == MATCH_ERROR)
2098 gfc_current_locus = where;
2100 /* Return what we know from the test(s). */
2105 gfc_current_locus = where;
2111 match_char_kind (int * kind, int * is_iso_c)
2120 where = gfc_current_locus;
2122 n = gfc_match_init_expr (&e);
2124 if (n != MATCH_YES && gfc_matching_function)
2126 /* The expression might include use-associated or imported
2127 parameters and try again after the specification
2130 gfc_undo_symbols ();
2135 gfc_error ("Expected initialization expression at %C");
2141 gfc_error ("Expected scalar initialization expression at %C");
2146 msg = gfc_extract_int (e, kind);
2147 *is_iso_c = e->ts.is_iso_c;
2157 /* Ignore errors to this point, if we've gotten here. This means
2158 we ignore the m=MATCH_ERROR from above. */
2159 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2161 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2165 /* All tests passed. */
2168 if (m == MATCH_ERROR)
2169 gfc_current_locus = where;
2171 /* Return what we know from the test(s). */
2176 gfc_current_locus = where;
2181 /* Match the various kind/length specifications in a CHARACTER
2182 declaration. We don't return MATCH_NO. */
2185 gfc_match_char_spec (gfc_typespec *ts)
2187 int kind, seen_length, is_iso_c;
2197 /* Try the old-style specification first. */
2198 old_char_selector = 0;
2200 m = match_char_length (&len);
2204 old_char_selector = 1;
2209 m = gfc_match_char ('(');
2212 m = MATCH_YES; /* Character without length is a single char. */
2216 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2217 if (gfc_match (" kind =") == MATCH_YES)
2219 m = match_char_kind (&kind, &is_iso_c);
2221 if (m == MATCH_ERROR)
2226 if (gfc_match (" , len =") == MATCH_NO)
2229 m = char_len_param_value (&len);
2232 if (m == MATCH_ERROR)
2239 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2240 if (gfc_match (" len =") == MATCH_YES)
2242 m = char_len_param_value (&len);
2245 if (m == MATCH_ERROR)
2249 if (gfc_match_char (')') == MATCH_YES)
2252 if (gfc_match (" , kind =") != MATCH_YES)
2255 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2261 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2262 m = char_len_param_value (&len);
2265 if (m == MATCH_ERROR)
2269 m = gfc_match_char (')');
2273 if (gfc_match_char (',') != MATCH_YES)
2276 gfc_match (" kind ="); /* Gobble optional text. */
2278 m = match_char_kind (&kind, &is_iso_c);
2279 if (m == MATCH_ERROR)
2285 /* Require a right-paren at this point. */
2286 m = gfc_match_char (')');
2291 gfc_error ("Syntax error in CHARACTER declaration at %C");
2293 gfc_free_expr (len);
2297 /* Deal with character functions after USE and IMPORT statements. */
2298 if (gfc_matching_function)
2300 gfc_free_expr (len);
2301 gfc_undo_symbols ();
2307 gfc_free_expr (len);
2311 /* Do some final massaging of the length values. */
2312 cl = gfc_new_charlen (gfc_current_ns, NULL);
2314 if (seen_length == 0)
2315 cl->length = gfc_int_expr (1);
2320 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2322 /* We have to know if it was a c interoperable kind so we can
2323 do accurate type checking of bind(c) procs, etc. */
2325 /* Mark this as c interoperable if being declared with one
2326 of the named constants from iso_c_binding. */
2327 ts->is_c_interop = is_iso_c;
2328 else if (len != NULL)
2329 /* Here, we might have parsed something such as: character(c_char)
2330 In this case, the parsing code above grabs the c_char when
2331 looking for the length (line 1690, roughly). it's the last
2332 testcase for parsing the kind params of a character variable.
2333 However, it's not actually the length. this seems like it
2335 To see if the user used a C interop kind, test the expr
2336 of the so called length, and see if it's C interoperable. */
2337 ts->is_c_interop = len->ts.is_iso_c;
2343 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2344 structure to the matched specification. This is necessary for FUNCTION and
2345 IMPLICIT statements.
2347 If implicit_flag is nonzero, then we don't check for the optional
2348 kind specification. Not doing so is needed for matching an IMPLICIT
2349 statement correctly. */
2352 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2354 char name[GFC_MAX_SYMBOL_LEN + 1];
2358 bool seen_deferred_kind;
2360 /* A belt and braces check that the typespec is correctly being treated
2361 as a deferred characteristic association. */
2362 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2363 && (gfc_current_block ()->result->ts.kind == -1)
2364 && (ts->kind == -1);
2366 if (seen_deferred_kind)
2369 /* Clear the current binding label, in case one is given. */
2370 curr_binding_label[0] = '\0';
2372 if (gfc_match (" byte") == MATCH_YES)
2374 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2378 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2380 gfc_error ("BYTE type used at %C "
2381 "is not available on the target machine");
2385 ts->type = BT_INTEGER;
2390 if (gfc_match (" integer") == MATCH_YES)
2392 ts->type = BT_INTEGER;
2393 ts->kind = gfc_default_integer_kind;
2397 if (gfc_match (" character") == MATCH_YES)
2399 ts->type = BT_CHARACTER;
2400 if (implicit_flag == 0)
2401 return gfc_match_char_spec (ts);
2406 if (gfc_match (" real") == MATCH_YES)
2409 ts->kind = gfc_default_real_kind;
2413 if (gfc_match (" double precision") == MATCH_YES)
2416 ts->kind = gfc_default_double_kind;
2420 if (gfc_match (" complex") == MATCH_YES)
2422 ts->type = BT_COMPLEX;
2423 ts->kind = gfc_default_complex_kind;
2427 if (gfc_match (" double complex") == MATCH_YES)
2429 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2430 "conform to the Fortran 95 standard") == FAILURE)
2433 ts->type = BT_COMPLEX;
2434 ts->kind = gfc_default_double_kind;
2438 if (gfc_match (" logical") == MATCH_YES)
2440 ts->type = BT_LOGICAL;
2441 ts->kind = gfc_default_logical_kind;
2445 m = gfc_match (" type ( %n )", name);
2447 ts->type = BT_DERIVED;
2450 m = gfc_match (" class ( %n )", name);
2453 ts->type = BT_CLASS;
2455 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2460 /* Defer association of the derived type until the end of the
2461 specification block. However, if the derived type can be
2462 found, add it to the typespec. */
2463 if (gfc_matching_function)
2465 ts->u.derived = NULL;
2466 if (gfc_current_state () != COMP_INTERFACE
2467 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2468 ts->u.derived = sym;
2472 /* Search for the name but allow the components to be defined later. If
2473 type = -1, this typespec has been seen in a function declaration but
2474 the type could not be accessed at that point. */
2476 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2478 gfc_error ("Type name '%s' at %C is ambiguous", name);
2481 else if (ts->kind == -1)
2483 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2484 || gfc_current_ns->has_import_set;
2485 if (gfc_find_symbol (name, NULL, iface, &sym))
2487 gfc_error ("Type name '%s' at %C is ambiguous", name);
2496 if (sym->attr.flavor != FL_DERIVED
2497 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2500 gfc_set_sym_referenced (sym);
2501 ts->u.derived = sym;
2506 /* For all types except double, derived and character, look for an
2507 optional kind specifier. MATCH_NO is actually OK at this point. */
2508 if (implicit_flag == 1)
2511 if (gfc_current_form == FORM_FREE)
2513 c = gfc_peek_ascii_char ();
2514 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2515 && c != ':' && c != ',')
2519 m = gfc_match_kind_spec (ts, false);
2520 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2521 m = gfc_match_old_kind_spec (ts);
2523 /* Defer association of the KIND expression of function results
2524 until after USE and IMPORT statements. */
2525 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2526 || gfc_matching_function)
2530 m = MATCH_YES; /* No kind specifier found. */
2536 /* Match an IMPLICIT NONE statement. Actually, this statement is
2537 already matched in parse.c, or we would not end up here in the
2538 first place. So the only thing we need to check, is if there is
2539 trailing garbage. If not, the match is successful. */
2542 gfc_match_implicit_none (void)
2544 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2548 /* Match the letter range(s) of an IMPLICIT statement. */
2551 match_implicit_range (void)
2557 cur_loc = gfc_current_locus;
2559 gfc_gobble_whitespace ();
2560 c = gfc_next_ascii_char ();
2563 gfc_error ("Missing character range in IMPLICIT at %C");
2570 gfc_gobble_whitespace ();
2571 c1 = gfc_next_ascii_char ();
2575 gfc_gobble_whitespace ();
2576 c = gfc_next_ascii_char ();
2581 inner = 0; /* Fall through. */
2588 gfc_gobble_whitespace ();
2589 c2 = gfc_next_ascii_char ();
2593 gfc_gobble_whitespace ();
2594 c = gfc_next_ascii_char ();
2596 if ((c != ',') && (c != ')'))
2609 gfc_error ("Letters must be in alphabetic order in "
2610 "IMPLICIT statement at %C");
2614 /* See if we can add the newly matched range to the pending
2615 implicits from this IMPLICIT statement. We do not check for
2616 conflicts with whatever earlier IMPLICIT statements may have
2617 set. This is done when we've successfully finished matching
2619 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2626 gfc_syntax_error (ST_IMPLICIT);
2628 gfc_current_locus = cur_loc;
2633 /* Match an IMPLICIT statement, storing the types for
2634 gfc_set_implicit() if the statement is accepted by the parser.
2635 There is a strange looking, but legal syntactic construction
2636 possible. It looks like:
2638 IMPLICIT INTEGER (a-b) (c-d)
2640 This is legal if "a-b" is a constant expression that happens to
2641 equal one of the legal kinds for integers. The real problem
2642 happens with an implicit specification that looks like:
2644 IMPLICIT INTEGER (a-b)
2646 In this case, a typespec matcher that is "greedy" (as most of the
2647 matchers are) gobbles the character range as a kindspec, leaving
2648 nothing left. We therefore have to go a bit more slowly in the
2649 matching process by inhibiting the kindspec checking during
2650 typespec matching and checking for a kind later. */
2653 gfc_match_implicit (void)
2662 /* We don't allow empty implicit statements. */
2663 if (gfc_match_eos () == MATCH_YES)
2665 gfc_error ("Empty IMPLICIT statement at %C");
2671 /* First cleanup. */
2672 gfc_clear_new_implicit ();
2674 /* A basic type is mandatory here. */
2675 m = gfc_match_decl_type_spec (&ts, 1);
2676 if (m == MATCH_ERROR)
2681 cur_loc = gfc_current_locus;
2682 m = match_implicit_range ();
2686 /* We may have <TYPE> (<RANGE>). */
2687 gfc_gobble_whitespace ();
2688 c = gfc_next_ascii_char ();
2689 if ((c == '\n') || (c == ','))
2691 /* Check for CHARACTER with no length parameter. */
2692 if (ts.type == BT_CHARACTER && !ts.u.cl)
2694 ts.kind = gfc_default_character_kind;
2695 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2696 ts.u.cl->length = gfc_int_expr (1);
2699 /* Record the Successful match. */
2700 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2705 gfc_current_locus = cur_loc;
2708 /* Discard the (incorrectly) matched range. */
2709 gfc_clear_new_implicit ();
2711 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2712 if (ts.type == BT_CHARACTER)
2713 m = gfc_match_char_spec (&ts);
2716 m = gfc_match_kind_spec (&ts, false);
2719 m = gfc_match_old_kind_spec (&ts);
2720 if (m == MATCH_ERROR)
2726 if (m == MATCH_ERROR)
2729 m = match_implicit_range ();
2730 if (m == MATCH_ERROR)
2735 gfc_gobble_whitespace ();
2736 c = gfc_next_ascii_char ();
2737 if ((c != '\n') && (c != ','))
2740 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2748 gfc_syntax_error (ST_IMPLICIT);
2756 gfc_match_import (void)
2758 char name[GFC_MAX_SYMBOL_LEN + 1];
2763 if (gfc_current_ns->proc_name == NULL
2764 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2766 gfc_error ("IMPORT statement at %C only permitted in "
2767 "an INTERFACE body");
2771 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2775 if (gfc_match_eos () == MATCH_YES)
2777 /* All host variables should be imported. */
2778 gfc_current_ns->has_import_set = 1;
2782 if (gfc_match (" ::") == MATCH_YES)
2784 if (gfc_match_eos () == MATCH_YES)
2786 gfc_error ("Expecting list of named entities at %C");
2793 m = gfc_match (" %n", name);
2797 if (gfc_current_ns->parent != NULL
2798 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2800 gfc_error ("Type name '%s' at %C is ambiguous", name);
2803 else if (gfc_current_ns->proc_name->ns->parent != NULL
2804 && gfc_find_symbol (name,
2805 gfc_current_ns->proc_name->ns->parent,
2808 gfc_error ("Type name '%s' at %C is ambiguous", name);
2814 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2815 "at %C - does not exist.", name);
2819 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2821 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2826 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2829 sym->attr.imported = 1;
2841 if (gfc_match_eos () == MATCH_YES)
2843 if (gfc_match_char (',') != MATCH_YES)
2850 gfc_error ("Syntax error in IMPORT statement at %C");
2855 /* A minimal implementation of gfc_match without whitespace, escape
2856 characters or variable arguments. Returns true if the next
2857 characters match the TARGET template exactly. */
2860 match_string_p (const char *target)
2864 for (p = target; *p; p++)
2865 if ((char) gfc_next_ascii_char () != *p)
2870 /* Matches an attribute specification including array specs. If
2871 successful, leaves the variables current_attr and current_as
2872 holding the specification. Also sets the colon_seen variable for
2873 later use by matchers associated with initializations.
2875 This subroutine is a little tricky in the sense that we don't know
2876 if we really have an attr-spec until we hit the double colon.
2877 Until that time, we can only return MATCH_NO. This forces us to
2878 check for duplicate specification at this level. */
2881 match_attr_spec (void)
2883 /* Modifiers that can exist in a type statement. */
2885 { GFC_DECL_BEGIN = 0,
2886 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2887 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2888 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2889 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2890 DECL_IS_BIND_C, DECL_NONE,
2891 GFC_DECL_END /* Sentinel */
2895 /* GFC_DECL_END is the sentinel, index starts at 0. */
2896 #define NUM_DECL GFC_DECL_END
2898 locus start, seen_at[NUM_DECL];
2905 gfc_clear_attr (¤t_attr);
2906 start = gfc_current_locus;
2911 /* See if we get all of the keywords up to the final double colon. */
2912 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2920 gfc_gobble_whitespace ();
2922 ch = gfc_next_ascii_char ();
2925 /* This is the successful exit condition for the loop. */
2926 if (gfc_next_ascii_char () == ':')
2931 gfc_gobble_whitespace ();
2932 switch (gfc_peek_ascii_char ())
2935 if (match_string_p ("allocatable"))
2936 d = DECL_ALLOCATABLE;
2940 /* Try and match the bind(c). */
2941 m = gfc_match_bind_c (NULL, true);
2944 else if (m == MATCH_ERROR)
2949 if (match_string_p ("dimension"))
2954 if (match_string_p ("external"))
2959 if (match_string_p ("int"))
2961 ch = gfc_next_ascii_char ();
2964 if (match_string_p ("nt"))
2966 /* Matched "intent". */
2967 /* TODO: Call match_intent_spec from here. */
2968 if (gfc_match (" ( in out )") == MATCH_YES)
2970 else if (gfc_match (" ( in )") == MATCH_YES)
2972 else if (gfc_match (" ( out )") == MATCH_YES)
2978 if (match_string_p ("insic"))
2980 /* Matched "intrinsic". */
2988 if (match_string_p ("optional"))
2993 gfc_next_ascii_char ();
2994 switch (gfc_next_ascii_char ())
2997 if (match_string_p ("rameter"))
2999 /* Matched "parameter". */
3005 if (match_string_p ("inter"))
3007 /* Matched "pointer". */
3013 ch = gfc_next_ascii_char ();
3016 if (match_string_p ("vate"))
3018 /* Matched "private". */
3024 if (match_string_p ("tected"))
3026 /* Matched "protected". */
3033 if (match_string_p ("blic"))
3035 /* Matched "public". */
3043 if (match_string_p ("save"))
3048 if (match_string_p ("target"))
3053 gfc_next_ascii_char ();
3054 ch = gfc_next_ascii_char ();
3057 if (match_string_p ("lue"))
3059 /* Matched "value". */
3065 if (match_string_p ("latile"))
3067 /* Matched "volatile". */
3075 /* No double colon and no recognizable decl_type, so assume that
3076 we've been looking at something else the whole time. */
3083 /* Check to make sure any parens are paired up correctly. */
3084 if (gfc_match_parens () == MATCH_ERROR)
3091 seen_at[d] = gfc_current_locus;
3093 if (d == DECL_DIMENSION)
3095 m = gfc_match_array_spec (¤t_as);
3099 gfc_error ("Missing dimension specification at %C");
3103 if (m == MATCH_ERROR)
3108 /* Since we've seen a double colon, we have to be looking at an
3109 attr-spec. This means that we can now issue errors. */
3110 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3115 case DECL_ALLOCATABLE:
3116 attr = "ALLOCATABLE";
3118 case DECL_DIMENSION:
3125 attr = "INTENT (IN)";
3128 attr = "INTENT (OUT)";
3131 attr = "INTENT (IN OUT)";
3133 case DECL_INTRINSIC:
3139 case DECL_PARAMETER:
3145 case DECL_PROTECTED:
3160 case DECL_IS_BIND_C:
3170 attr = NULL; /* This shouldn't happen. */
3173 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3178 /* Now that we've dealt with duplicate attributes, add the attributes
3179 to the current attribute. */
3180 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3185 if (gfc_current_state () == COMP_DERIVED
3186 && d != DECL_DIMENSION && d != DECL_POINTER
3187 && d != DECL_PRIVATE && d != DECL_PUBLIC
3190 if (d == DECL_ALLOCATABLE)
3192 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3193 "attribute at %C in a TYPE definition")
3202 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3209 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3210 && gfc_current_state () != COMP_MODULE)
3212 if (d == DECL_PRIVATE)
3216 if (gfc_current_state () == COMP_DERIVED
3217 && gfc_state_stack->previous
3218 && gfc_state_stack->previous->state == COMP_MODULE)
3220 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3221 "at %L in a TYPE definition", attr,
3231 gfc_error ("%s attribute at %L is not allowed outside of the "
3232 "specification part of a module", attr, &seen_at[d]);
3240 case DECL_ALLOCATABLE:
3241 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3244 case DECL_DIMENSION:
3245 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3249 t = gfc_add_external (¤t_attr, &seen_at[d]);
3253 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3257 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3261 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3264 case DECL_INTRINSIC:
3265 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3269 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3272 case DECL_PARAMETER:
3273 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3277 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3280 case DECL_PROTECTED:
3281 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3283 gfc_error ("PROTECTED at %C only allowed in specification "
3284 "part of a module");
3289 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3294 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3298 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3303 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3308 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3312 t = gfc_add_target (¤t_attr, &seen_at[d]);
3315 case DECL_IS_BIND_C:
3316 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3320 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3325 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3329 if (gfc_notify_std (GFC_STD_F2003,
3330 "Fortran 2003: VOLATILE attribute at %C")
3334 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3338 gfc_internal_error ("match_attr_spec(): Bad attribute");
3352 gfc_current_locus = start;
3353 gfc_free_array_spec (current_as);
3359 /* Set the binding label, dest_label, either with the binding label
3360 stored in the given gfc_typespec, ts, or if none was provided, it
3361 will be the symbol name in all lower case, as required by the draft
3362 (J3/04-007, section 15.4.1). If a binding label was given and
3363 there is more than one argument (num_idents), it is an error. */
3366 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3368 if (num_idents > 1 && has_name_equals)
3370 gfc_error ("Multiple identifiers provided with "
3371 "single NAME= specifier at %C");
3375 if (curr_binding_label[0] != '\0')
3377 /* Binding label given; store in temp holder til have sym. */
3378 strcpy (dest_label, curr_binding_label);
3382 /* No binding label given, and the NAME= specifier did not exist,
3383 which means there was no NAME="". */
3384 if (sym_name != NULL && has_name_equals == 0)
3385 strcpy (dest_label, sym_name);
3392 /* Set the status of the given common block as being BIND(C) or not,
3393 depending on the given parameter, is_bind_c. */
3396 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3398 com_block->is_bind_c = is_bind_c;
3403 /* Verify that the given gfc_typespec is for a C interoperable type. */
3406 verify_c_interop (gfc_typespec *ts)
3408 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3409 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3410 else if (ts->is_c_interop != 1)
3417 /* Verify that the variables of a given common block, which has been
3418 defined with the attribute specifier bind(c), to be of a C
3419 interoperable type. Errors will be reported here, if
3423 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3425 gfc_symbol *curr_sym = NULL;
3426 gfc_try retval = SUCCESS;
3428 curr_sym = com_block->head;
3430 /* Make sure we have at least one symbol. */
3431 if (curr_sym == NULL)
3434 /* Here we know we have a symbol, so we'll execute this loop
3438 /* The second to last param, 1, says this is in a common block. */
3439 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3440 curr_sym = curr_sym->common_next;
3441 } while (curr_sym != NULL);
3447 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3448 an appropriate error message is reported. */
3451 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3452 int is_in_common, gfc_common_head *com_block)
3454 bool bind_c_function = false;
3455 gfc_try retval = SUCCESS;
3457 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3458 bind_c_function = true;
3460 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3462 tmp_sym = tmp_sym->result;
3463 /* Make sure it wasn't an implicitly typed result. */
3464 if (tmp_sym->attr.implicit_type)
3466 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3467 "%L may not be C interoperable", tmp_sym->name,
3468 &tmp_sym->declared_at);
3469 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3470 /* Mark it as C interoperable to prevent duplicate warnings. */
3471 tmp_sym->ts.is_c_interop = 1;
3472 tmp_sym->attr.is_c_interop = 1;
3476 /* Here, we know we have the bind(c) attribute, so if we have
3477 enough type info, then verify that it's a C interop kind.
3478 The info could be in the symbol already, or possibly still in
3479 the given ts (current_ts), so look in both. */
3480 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3482 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3484 /* See if we're dealing with a sym in a common block or not. */
3485 if (is_in_common == 1)
3487 gfc_warning ("Variable '%s' in common block '%s' at %L "
3488 "may not be a C interoperable "
3489 "kind though common block '%s' is BIND(C)",
3490 tmp_sym->name, com_block->name,
3491 &(tmp_sym->declared_at), com_block->name);
3495 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3496 gfc_error ("Type declaration '%s' at %L is not C "
3497 "interoperable but it is BIND(C)",
3498 tmp_sym->name, &(tmp_sym->declared_at));
3500 gfc_warning ("Variable '%s' at %L "
3501 "may not be a C interoperable "
3502 "kind but it is bind(c)",
3503 tmp_sym->name, &(tmp_sym->declared_at));
3507 /* Variables declared w/in a common block can't be bind(c)
3508 since there's no way for C to see these variables, so there's
3509 semantically no reason for the attribute. */
3510 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3512 gfc_error ("Variable '%s' in common block '%s' at "
3513 "%L cannot be declared with BIND(C) "
3514 "since it is not a global",
3515 tmp_sym->name, com_block->name,
3516 &(tmp_sym->declared_at));
3520 /* Scalar variables that are bind(c) can not have the pointer
3521 or allocatable attributes. */
3522 if (tmp_sym->attr.is_bind_c == 1)
3524 if (tmp_sym->attr.pointer == 1)
3526 gfc_error ("Variable '%s' at %L cannot have both the "
3527 "POINTER and BIND(C) attributes",
3528 tmp_sym->name, &(tmp_sym->declared_at));
3532 if (tmp_sym->attr.allocatable == 1)
3534 gfc_error ("Variable '%s' at %L cannot have both the "
3535 "ALLOCATABLE and BIND(C) attributes",
3536 tmp_sym->name, &(tmp_sym->declared_at));
3542 /* If it is a BIND(C) function, make sure the return value is a
3543 scalar value. The previous tests in this function made sure
3544 the type is interoperable. */
3545 if (bind_c_function && tmp_sym->as != NULL)
3546 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3547 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3549 /* BIND(C) functions can not return a character string. */
3550 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3551 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3552 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3553 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3554 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3555 "be a character string", tmp_sym->name,
3556 &(tmp_sym->declared_at));
3559 /* See if the symbol has been marked as private. If it has, make sure
3560 there is no binding label and warn the user if there is one. */
3561 if (tmp_sym->attr.access == ACCESS_PRIVATE
3562 && tmp_sym->binding_label[0] != '\0')
3563 /* Use gfc_warning_now because we won't say that the symbol fails
3564 just because of this. */
3565 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3566 "given the binding label '%s'", tmp_sym->name,
3567 &(tmp_sym->declared_at), tmp_sym->binding_label);
3573 /* Set the appropriate fields for a symbol that's been declared as
3574 BIND(C) (the is_bind_c flag and the binding label), and verify that
3575 the type is C interoperable. Errors are reported by the functions
3576 used to set/test these fields. */
3579 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3581 gfc_try retval = SUCCESS;
3583 /* TODO: Do we need to make sure the vars aren't marked private? */
3585 /* Set the is_bind_c bit in symbol_attribute. */
3586 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3588 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3589 num_idents) != SUCCESS)
3596 /* Set the fields marking the given common block as BIND(C), including
3597 a binding label, and report any errors encountered. */
3600 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3602 gfc_try retval = SUCCESS;
3604 /* destLabel, common name, typespec (which may have binding label). */
3605 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3609 /* Set the given common block (com_block) to being bind(c) (1). */
3610 set_com_block_bind_c (com_block, 1);
3616 /* Retrieve the list of one or more identifiers that the given bind(c)
3617 attribute applies to. */
3620 get_bind_c_idents (void)
3622 char name[GFC_MAX_SYMBOL_LEN + 1];
3624 gfc_symbol *tmp_sym = NULL;
3626 gfc_common_head *com_block = NULL;
3628 if (gfc_match_name (name) == MATCH_YES)
3630 found_id = MATCH_YES;
3631 gfc_get_ha_symbol (name, &tmp_sym);
3633 else if (match_common_name (name) == MATCH_YES)
3635 found_id = MATCH_YES;
3636 com_block = gfc_get_common (name, 0);
3640 gfc_error ("Need either entity or common block name for "
3641 "attribute specification statement at %C");
3645 /* Save the current identifier and look for more. */
3648 /* Increment the number of identifiers found for this spec stmt. */
3651 /* Make sure we have a sym or com block, and verify that it can
3652 be bind(c). Set the appropriate field(s) and look for more
3654 if (tmp_sym != NULL || com_block != NULL)
3656 if (tmp_sym != NULL)
3658 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3664 if (set_verify_bind_c_com_block(com_block, num_idents)
3669 /* Look to see if we have another identifier. */
3671 if (gfc_match_eos () == MATCH_YES)
3672 found_id = MATCH_NO;
3673 else if (gfc_match_char (',') != MATCH_YES)
3674 found_id = MATCH_NO;
3675 else if (gfc_match_name (name) == MATCH_YES)
3677 found_id = MATCH_YES;
3678 gfc_get_ha_symbol (name, &tmp_sym);
3680 else if (match_common_name (name) == MATCH_YES)
3682 found_id = MATCH_YES;
3683 com_block = gfc_get_common (name, 0);
3687 gfc_error ("Missing entity or common block name for "
3688 "attribute specification statement at %C");
3694 gfc_internal_error ("Missing symbol");
3696 } while (found_id == MATCH_YES);
3698 /* if we get here we were successful */
3703 /* Try and match a BIND(C) attribute specification statement. */
3706 gfc_match_bind_c_stmt (void)
3708 match found_match = MATCH_NO;
3713 /* This may not be necessary. */
3715 /* Clear the temporary binding label holder. */
3716 curr_binding_label[0] = '\0';
3718 /* Look for the bind(c). */
3719 found_match = gfc_match_bind_c (NULL, true);
3721 if (found_match == MATCH_YES)
3723 /* Look for the :: now, but it is not required. */
3726 /* Get the identifier(s) that needs to be updated. This may need to
3727 change to hand the flag(s) for the attr specified so all identifiers
3728 found can have all appropriate parts updated (assuming that the same
3729 spec stmt can have multiple attrs, such as both bind(c) and
3731 if (get_bind_c_idents () != SUCCESS)
3732 /* Error message should have printed already. */
3740 /* Match a data declaration statement. */
3743 gfc_match_data_decl (void)
3749 num_idents_on_line = 0;
3751 m = gfc_match_decl_type_spec (¤t_ts, 0);
3755 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3757 sym = gfc_use_derived (current_ts.u.derived);
3765 current_ts.u.derived = sym;
3768 m = match_attr_spec ();
3769 if (m == MATCH_ERROR)
3775 if (current_ts.type == BT_DERIVED && current_ts.u.derived->components == NULL
3776 && !current_ts.u.derived->attr.zero_comp)
3779 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3782 gfc_find_symbol (current_ts.u.derived->name,
3783 current_ts.u.derived->ns->parent, 1, &sym);
3785 /* Any symbol that we find had better be a type definition
3786 which has its components defined. */
3787 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3788 && (current_ts.u.derived->components != NULL
3789 || current_ts.u.derived->attr.zero_comp))
3792 /* Now we have an error, which we signal, and then fix up
3793 because the knock-on is plain and simple confusing. */
3794 gfc_error_now ("Derived type at %C has not been previously defined "
3795 "and so cannot appear in a derived type definition");
3796 current_attr.pointer = 1;
3801 /* If we have an old-style character declaration, and no new-style
3802 attribute specifications, then there a comma is optional between
3803 the type specification and the variable list. */
3804 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3805 gfc_match_char (',');
3807 /* Give the types/attributes to symbols that follow. Give the element
3808 a number so that repeat character length expressions can be copied. */
3812 num_idents_on_line++;
3813 m = variable_decl (elem++);
3814 if (m == MATCH_ERROR)
3819 if (gfc_match_eos () == MATCH_YES)
3821 if (gfc_match_char (',') != MATCH_YES)
3825 if (gfc_error_flag_test () == 0)
3826 gfc_error ("Syntax error in data declaration at %C");
3829 gfc_free_data_all (gfc_current_ns);
3832 gfc_free_array_spec (current_as);
3838 /* Match a prefix associated with a function or subroutine
3839 declaration. If the typespec pointer is nonnull, then a typespec
3840 can be matched. Note that if nothing matches, MATCH_YES is
3841 returned (the null string was matched). */
3844 gfc_match_prefix (gfc_typespec *ts)
3848 gfc_clear_attr (¤t_attr);
3851 gcc_assert (!gfc_matching_prefix);
3852 gfc_matching_prefix = true;
3855 if (!seen_type && ts != NULL
3856 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3857 && gfc_match_space () == MATCH_YES)
3864 if (gfc_match ("elemental% ") == MATCH_YES)
3866 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3872 if (gfc_match ("pure% ") == MATCH_YES)
3874 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3880 if (gfc_match ("recursive% ") == MATCH_YES)
3882 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3888 /* At this point, the next item is not a prefix. */
3889 gcc_assert (gfc_matching_prefix);
3890 gfc_matching_prefix = false;
3894 gcc_assert (gfc_matching_prefix);
3895 gfc_matching_prefix = false;
3900 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3903 copy_prefix (symbol_attribute *dest, locus *where)
3905 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3908 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3911 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3918 /* Match a formal argument list. */
3921 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3923 gfc_formal_arglist *head, *tail, *p, *q;
3924 char name[GFC_MAX_SYMBOL_LEN + 1];
3930 if (gfc_match_char ('(') != MATCH_YES)
3937 if (gfc_match_char (')') == MATCH_YES)
3942 if (gfc_match_char ('*') == MATCH_YES)
3946 m = gfc_match_name (name);
3950 if (gfc_get_symbol (name, NULL, &sym))
3954 p = gfc_get_formal_arglist ();
3966 /* We don't add the VARIABLE flavor because the name could be a
3967 dummy procedure. We don't apply these attributes to formal
3968 arguments of statement functions. */
3969 if (sym != NULL && !st_flag
3970 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3971 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3977 /* The name of a program unit can be in a different namespace,
3978 so check for it explicitly. After the statement is accepted,
3979 the name is checked for especially in gfc_get_symbol(). */
3980 if (gfc_new_block != NULL && sym != NULL
3981 && strcmp (sym->name, gfc_new_block->name) == 0)
3983 gfc_error ("Name '%s' at %C is the name of the procedure",
3989 if (gfc_match_char (')') == MATCH_YES)
3992 m = gfc_match_char (',');
3995 gfc_error ("Unexpected junk in formal argument list at %C");
4001 /* Check for duplicate symbols in the formal argument list. */
4004 for (p = head; p->next; p = p->next)
4009 for (q = p->next; q; q = q->next)
4010 if (p->sym == q->sym)
4012 gfc_error ("Duplicate symbol '%s' in formal argument list "
4013 "at %C", p->sym->name);
4021 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
4031 gfc_free_formal_arglist (head);
4036 /* Match a RESULT specification following a function declaration or
4037 ENTRY statement. Also matches the end-of-statement. */
4040 match_result (gfc_symbol *function, gfc_symbol **result)
4042 char name[GFC_MAX_SYMBOL_LEN + 1];
4046 if (gfc_match (" result (") != MATCH_YES)
4049 m = gfc_match_name (name);
4053 /* Get the right paren, and that's it because there could be the
4054 bind(c) attribute after the result clause. */
4055 if (gfc_match_char(')') != MATCH_YES)
4057 /* TODO: should report the missing right paren here. */
4061 if (strcmp (function->name, name) == 0)
4063 gfc_error ("RESULT variable at %C must be different than function name");
4067 if (gfc_get_symbol (name, NULL, &r))
4070 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4079 /* Match a function suffix, which could be a combination of a result
4080 clause and BIND(C), either one, or neither. The draft does not
4081 require them to come in a specific order. */
4084 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4086 match is_bind_c; /* Found bind(c). */
4087 match is_result; /* Found result clause. */
4088 match found_match; /* Status of whether we've found a good match. */
4089 char peek_char; /* Character we're going to peek at. */
4090 bool allow_binding_name;
4092 /* Initialize to having found nothing. */
4093 found_match = MATCH_NO;
4094 is_bind_c = MATCH_NO;
4095 is_result = MATCH_NO;
4097 /* Get the next char to narrow between result and bind(c). */
4098 gfc_gobble_whitespace ();
4099 peek_char = gfc_peek_ascii_char ();
4101 /* C binding names are not allowed for internal procedures. */
4102 if (gfc_current_state () == COMP_CONTAINS
4103 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4104 allow_binding_name = false;
4106 allow_binding_name = true;
4111 /* Look for result clause. */
4112 is_result = match_result (sym, result);
4113 if (is_result == MATCH_YES)
4115 /* Now see if there is a bind(c) after it. */
4116 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4117 /* We've found the result clause and possibly bind(c). */
4118 found_match = MATCH_YES;
4121 /* This should only be MATCH_ERROR. */
4122 found_match = is_result;
4125 /* Look for bind(c) first. */
4126 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4127 if (is_bind_c == MATCH_YES)
4129 /* Now see if a result clause followed it. */
4130 is_result = match_result (sym, result);
4131 found_match = MATCH_YES;
4135 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4136 found_match = MATCH_ERROR;
4140 gfc_error ("Unexpected junk after function declaration at %C");
4141 found_match = MATCH_ERROR;
4145 if (is_bind_c == MATCH_YES)
4147 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4148 if (gfc_current_state () == COMP_CONTAINS
4149 && sym->ns->proc_name->attr.flavor != FL_MODULE
4150 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4151 "at %L may not be specified for an internal "
4152 "procedure", &gfc_current_locus)
4156 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4165 /* Procedure pointer return value without RESULT statement:
4166 Add "hidden" result variable named "ppr@". */
4169 add_hidden_procptr_result (gfc_symbol *sym)
4173 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4176 /* First usage case: PROCEDURE and EXTERNAL statements. */
4177 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4178 && strcmp (gfc_current_block ()->name, sym->name) == 0
4179 && sym->attr.external;
4180 /* Second usage case: INTERFACE statements. */
4181 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4182 && gfc_state_stack->previous->state == COMP_FUNCTION
4183 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4189 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4193 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4194 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4195 st2->n.sym = stree->n.sym;
4197 sym->result = stree->n.sym;
4199 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4200 sym->result->attr.pointer = sym->attr.pointer;
4201 sym->result->attr.external = sym->attr.external;
4202 sym->result->attr.referenced = sym->attr.referenced;
4203 sym->result->ts = sym->ts;
4204 sym->attr.proc_pointer = 0;
4205 sym->attr.pointer = 0;
4206 sym->attr.external = 0;
4207 if (sym->result->attr.external && sym->result->attr.pointer)
4209 sym->result->attr.pointer = 0;
4210 sym->result->attr.proc_pointer = 1;
4213 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4215 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4216 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4217 && sym->result && sym->result != sym && sym->result->attr.external
4218 && sym == gfc_current_ns->proc_name
4219 && sym == sym->result->ns->proc_name
4220 && strcmp ("ppr@", sym->result->name) == 0)
4222 sym->result->attr.proc_pointer = 1;
4223 sym->attr.pointer = 0;
4231 /* Match the interface for a PROCEDURE declaration,
4232 including brackets (R1212). */
4235 match_procedure_interface (gfc_symbol **proc_if)
4239 locus old_loc, entry_loc;
4240 gfc_namespace *old_ns = gfc_current_ns;
4241 char name[GFC_MAX_SYMBOL_LEN + 1];
4243 old_loc = entry_loc = gfc_current_locus;
4244 gfc_clear_ts (¤t_ts);
4246 if (gfc_match (" (") != MATCH_YES)
4248 gfc_current_locus = entry_loc;
4252 /* Get the type spec. for the procedure interface. */
4253 old_loc = gfc_current_locus;
4254 m = gfc_match_decl_type_spec (¤t_ts, 0);
4255 gfc_gobble_whitespace ();
4256 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4259 if (m == MATCH_ERROR)
4262 /* Procedure interface is itself a procedure. */
4263 gfc_current_locus = old_loc;
4264 m = gfc_match_name (name);
4266 /* First look to see if it is already accessible in the current
4267 namespace because it is use associated or contained. */
4269 if (gfc_find_sym_tree (name, NULL, 0, &st))
4272 /* If it is still not found, then try the parent namespace, if it
4273 exists and create the symbol there if it is still not found. */
4274 if (gfc_current_ns->parent)
4275 gfc_current_ns = gfc_current_ns->parent;
4276 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4279 gfc_current_ns = old_ns;
4280 *proc_if = st->n.sym;
4282 /* Various interface checks. */
4286 /* Resolve interface if possible. That way, attr.procedure is only set
4287 if it is declared by a later procedure-declaration-stmt, which is
4288 invalid per C1212. */
4289 while ((*proc_if)->ts.interface)
4290 *proc_if = (*proc_if)->ts.interface;
4292 if ((*proc_if)->generic)
4294 gfc_error ("Interface '%s' at %C may not be generic",
4298 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4300 gfc_error ("Interface '%s' at %C may not be a statement function",
4304 /* Handle intrinsic procedures. */
4305 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4306 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4307 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4308 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4309 (*proc_if)->attr.intrinsic = 1;
4310 if ((*proc_if)->attr.intrinsic
4311 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4313 gfc_error ("Intrinsic procedure '%s' not allowed "
4314 "in PROCEDURE statement at %C", (*proc_if)->name);
4320 if (gfc_match (" )") != MATCH_YES)
4322 gfc_current_locus = entry_loc;
4330 /* Match a PROCEDURE declaration (R1211). */
4333 match_procedure_decl (void)
4336 gfc_symbol *sym, *proc_if = NULL;
4338 gfc_expr *initializer = NULL;
4340 /* Parse interface (with brackets). */
4341 m = match_procedure_interface (&proc_if);
4345 /* Parse attributes (with colons). */
4346 m = match_attr_spec();
4347 if (m == MATCH_ERROR)
4350 /* Get procedure symbols. */
4353 m = gfc_match_symbol (&sym, 0);
4356 else if (m == MATCH_ERROR)
4359 /* Add current_attr to the symbol attributes. */
4360 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4363 if (sym->attr.is_bind_c)
4365 /* Check for C1218. */
4366 if (!proc_if || !proc_if->attr.is_bind_c)
4368 gfc_error ("BIND(C) attribute at %C requires "
4369 "an interface with BIND(C)");
4372 /* Check for C1217. */
4373 if (has_name_equals && sym->attr.pointer)
4375 gfc_error ("BIND(C) procedure with NAME may not have "
4376 "POINTER attribute at %C");
4379 if (has_name_equals && sym->attr.dummy)
4381 gfc_error ("Dummy procedure at %C may not have "
4382 "BIND(C) attribute with NAME");
4385 /* Set binding label for BIND(C). */
4386 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4390 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4393 if (add_hidden_procptr_result (sym) == SUCCESS)
4396 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4399 /* Set interface. */
4400 if (proc_if != NULL)
4402 if (sym->ts.type != BT_UNKNOWN)
4404 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4405 sym->name, &gfc_current_locus,
4406 gfc_basic_typename (sym->ts.type));
4409 sym->ts.interface = proc_if;
4410 sym->attr.untyped = 1;
4411 sym->attr.if_source = IFSRC_IFBODY;
4413 else if (current_ts.type != BT_UNKNOWN)
4415 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4417 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4418 sym->ts.interface->ts = current_ts;
4419 sym->ts.interface->attr.function = 1;
4420 sym->attr.function = sym->ts.interface->attr.function;
4421 sym->attr.if_source = IFSRC_UNKNOWN;
4424 if (gfc_match (" =>") == MATCH_YES)
4426 if (!current_attr.pointer)
4428 gfc_error ("Initialization at %C isn't for a pointer variable");
4433 m = gfc_match_null (&initializer);
4436 gfc_error ("Pointer initialization requires a NULL() at %C");
4440 if (gfc_pure (NULL))
4442 gfc_error ("Initialization of pointer at %C is not allowed in "
4443 "a PURE procedure");
4450 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4456 gfc_set_sym_referenced (sym);
4458 if (gfc_match_eos () == MATCH_YES)
4460 if (gfc_match_char (',') != MATCH_YES)
4465 gfc_error ("Syntax error in PROCEDURE statement at %C");
4469 /* Free stuff up and return. */
4470 gfc_free_expr (initializer);
4476 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4479 /* Match a procedure pointer component declaration (R445). */
4482 match_ppc_decl (void)
4485 gfc_symbol *proc_if = NULL;
4489 gfc_expr *initializer = NULL;
4490 gfc_typebound_proc* tb;
4491 char name[GFC_MAX_SYMBOL_LEN + 1];
4493 /* Parse interface (with brackets). */
4494 m = match_procedure_interface (&proc_if);
4498 /* Parse attributes. */
4499 tb = XCNEW (gfc_typebound_proc);
4500 tb->where = gfc_current_locus;
4501 m = match_binding_attributes (tb, false, true);
4502 if (m == MATCH_ERROR)
4505 gfc_clear_attr (¤t_attr);
4506 current_attr.procedure = 1;
4507 current_attr.proc_pointer = 1;
4508 current_attr.access = tb->access;
4509 current_attr.flavor = FL_PROCEDURE;
4511 /* Match the colons (required). */
4512 if (gfc_match (" ::") != MATCH_YES)
4514 gfc_error ("Expected '::' after binding-attributes at %C");
4518 /* Check for C450. */
4519 if (!tb->nopass && proc_if == NULL)
4521 gfc_error("NOPASS or explicit interface required at %C");
4525 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4526 "component at %C") == FAILURE)
4529 /* Match PPC names. */
4533 m = gfc_match_name (name);
4536 else if (m == MATCH_ERROR)
4539 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4542 /* Add current_attr to the symbol attributes. */
4543 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4546 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4549 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4554 /* Set interface. */
4555 if (proc_if != NULL)
4557 c->ts.interface = proc_if;
4558 c->attr.untyped = 1;
4559 c->attr.if_source = IFSRC_IFBODY;
4561 else if (ts.type != BT_UNKNOWN)
4564 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4565 c->ts.interface->ts = ts;
4566 c->ts.interface->attr.function = 1;
4567 c->attr.function = c->ts.interface->attr.function;
4568 c->attr.if_source = IFSRC_UNKNOWN;
4571 if (gfc_match (" =>") == MATCH_YES)
4573 m = gfc_match_null (&initializer);
4576 gfc_error ("Pointer initialization requires a NULL() at %C");
4579 if (gfc_pure (NULL))
4581 gfc_error ("Initialization of pointer at %C is not allowed in "
4582 "a PURE procedure");
4587 gfc_free_expr (initializer);
4590 c->initializer = initializer;
4593 if (gfc_match_eos () == MATCH_YES)
4595 if (gfc_match_char (',') != MATCH_YES)
4600 gfc_error ("Syntax error in procedure pointer component at %C");
4605 /* Match a PROCEDURE declaration inside an interface (R1206). */
4608 match_procedure_in_interface (void)
4612 char name[GFC_MAX_SYMBOL_LEN + 1];
4614 if (current_interface.type == INTERFACE_NAMELESS
4615 || current_interface.type == INTERFACE_ABSTRACT)
4617 gfc_error ("PROCEDURE at %C must be in a generic interface");
4623 m = gfc_match_name (name);
4626 else if (m == MATCH_ERROR)
4628 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4631 if (gfc_add_interface (sym) == FAILURE)
4634 if (gfc_match_eos () == MATCH_YES)
4636 if (gfc_match_char (',') != MATCH_YES)
4643 gfc_error ("Syntax error in PROCEDURE statement at %C");
4648 /* General matcher for PROCEDURE declarations. */
4650 static match match_procedure_in_type (void);
4653 gfc_match_procedure (void)
4657 switch (gfc_current_state ())
4662 case COMP_SUBROUTINE:
4664 m = match_procedure_decl ();
4666 case COMP_INTERFACE:
4667 m = match_procedure_in_interface ();
4670 m = match_ppc_decl ();
4672 case COMP_DERIVED_CONTAINS:
4673 m = match_procedure_in_type ();
4682 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4690 /* Warn if a matched procedure has the same name as an intrinsic; this is
4691 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4692 parser-state-stack to find out whether we're in a module. */
4695 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4699 in_module = (gfc_state_stack->previous
4700 && gfc_state_stack->previous->state == COMP_MODULE);
4702 gfc_warn_intrinsic_shadow (sym, in_module, func);
4706 /* Match a function declaration. */
4709 gfc_match_function_decl (void)
4711 char name[GFC_MAX_SYMBOL_LEN + 1];
4712 gfc_symbol *sym, *result;
4716 match found_match; /* Status returned by match func. */
4718 if (gfc_current_state () != COMP_NONE
4719 && gfc_current_state () != COMP_INTERFACE
4720 && gfc_current_state () != COMP_CONTAINS)
4723 gfc_clear_ts (¤t_ts);
4725 old_loc = gfc_current_locus;
4727 m = gfc_match_prefix (¤t_ts);
4730 gfc_current_locus = old_loc;
4734 if (gfc_match ("function% %n", name) != MATCH_YES)
4736 gfc_current_locus = old_loc;
4739 if (get_proc_name (name, &sym, false))
4742 if (add_hidden_procptr_result (sym) == SUCCESS)
4745 gfc_new_block = sym;
4747 m = gfc_match_formal_arglist (sym, 0, 0);
4750 gfc_error ("Expected formal argument list in function "
4751 "definition at %C");
4755 else if (m == MATCH_ERROR)
4760 /* According to the draft, the bind(c) and result clause can
4761 come in either order after the formal_arg_list (i.e., either
4762 can be first, both can exist together or by themselves or neither
4763 one). Therefore, the match_result can't match the end of the
4764 string, and check for the bind(c) or result clause in either order. */
4765 found_match = gfc_match_eos ();
4767 /* Make sure that it isn't already declared as BIND(C). If it is, it
4768 must have been marked BIND(C) with a BIND(C) attribute and that is
4769 not allowed for procedures. */
4770 if (sym->attr.is_bind_c == 1)
4772 sym->attr.is_bind_c = 0;
4773 if (sym->old_symbol != NULL)
4774 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4775 "variables or common blocks",
4776 &(sym->old_symbol->declared_at));
4778 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4779 "variables or common blocks", &gfc_current_locus);
4782 if (found_match != MATCH_YES)
4784 /* If we haven't found the end-of-statement, look for a suffix. */
4785 suffix_match = gfc_match_suffix (sym, &result);
4786 if (suffix_match == MATCH_YES)
4787 /* Need to get the eos now. */
4788 found_match = gfc_match_eos ();
4790 found_match = suffix_match;
4793 if(found_match != MATCH_YES)
4797 /* Make changes to the symbol. */
4800 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4803 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4804 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4807 /* Delay matching the function characteristics until after the
4808 specification block by signalling kind=-1. */
4809 sym->declared_at = old_loc;
4810 if (current_ts.type != BT_UNKNOWN)
4811 current_ts.kind = -1;
4813 current_ts.kind = 0;
4817 if (current_ts.type != BT_UNKNOWN
4818 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4824 if (current_ts.type != BT_UNKNOWN
4825 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4828 sym->result = result;
4831 /* Warn if this procedure has the same name as an intrinsic. */
4832 warn_intrinsic_shadow (sym, true);
4838 gfc_current_locus = old_loc;
4843 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4844 pass the name of the entry, rather than the gfc_current_block name, and
4845 to return false upon finding an existing global entry. */
4848 add_global_entry (const char *name, int sub)
4851 enum gfc_symbol_type type;
4853 s = gfc_get_gsymbol(name);
4854 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4857 || (s->type != GSYM_UNKNOWN
4858 && s->type != type))
4859 gfc_global_used(s, NULL);
4863 s->where = gfc_current_locus;
4865 s->ns = gfc_current_ns;
4872 /* Match an ENTRY statement. */
4875 gfc_match_entry (void)
4880 char name[GFC_MAX_SYMBOL_LEN + 1];
4881 gfc_compile_state state;
4885 bool module_procedure;
4889 m = gfc_match_name (name);
4893 state = gfc_current_state ();
4894 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4899 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4902 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4904 case COMP_BLOCK_DATA:
4905 gfc_error ("ENTRY statement at %C cannot appear within "
4908 case COMP_INTERFACE:
4909 gfc_error ("ENTRY statement at %C cannot appear within "
4913 gfc_error ("ENTRY statement at %C cannot appear within "
4914 "a DERIVED TYPE block");
4917 gfc_error ("ENTRY statement at %C cannot appear within "
4918 "an IF-THEN block");
4921 gfc_error ("ENTRY statement at %C cannot appear within "
4925 gfc_error ("ENTRY statement at %C cannot appear within "
4929 gfc_error ("ENTRY statement at %C cannot appear within "
4933 gfc_error ("ENTRY statement at %C cannot appear within "
4937 gfc_error ("ENTRY statement at %C cannot appear within "
4938 "a contained subprogram");
4941 gfc_internal_error ("gfc_match_entry(): Bad state");
4946 module_procedure = gfc_current_ns->parent != NULL
4947 && gfc_current_ns->parent->proc_name
4948 && gfc_current_ns->parent->proc_name->attr.flavor
4951 if (gfc_current_ns->parent != NULL
4952 && gfc_current_ns->parent->proc_name
4953 && !module_procedure)
4955 gfc_error("ENTRY statement at %C cannot appear in a "
4956 "contained procedure");
4960 /* Module function entries need special care in get_proc_name
4961 because previous references within the function will have
4962 created symbols attached to the current namespace. */
4963 if (get_proc_name (name, &entry,
4964 gfc_current_ns->parent != NULL
4965 && module_procedure))
4968 proc = gfc_current_block ();
4970 /* Make sure that it isn't already declared as BIND(C). If it is, it
4971 must have been marked BIND(C) with a BIND(C) attribute and that is
4972 not allowed for procedures. */
4973 if (entry->attr.is_bind_c == 1)
4975 entry->attr.is_bind_c = 0;
4976 if (entry->old_symbol != NULL)
4977 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4978 "variables or common blocks",
4979 &(entry->old_symbol->declared_at));
4981 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4982 "variables or common blocks", &gfc_current_locus);
4985 /* Check what next non-whitespace character is so we can tell if there
4986 is the required parens if we have a BIND(C). */
4987 gfc_gobble_whitespace ();
4988 peek_char = gfc_peek_ascii_char ();
4990 if (state == COMP_SUBROUTINE)
4992 /* An entry in a subroutine. */
4993 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4996 m = gfc_match_formal_arglist (entry, 0, 1);
5000 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5001 never be an internal procedure. */
5002 is_bind_c = gfc_match_bind_c (entry, true);
5003 if (is_bind_c == MATCH_ERROR)
5005 if (is_bind_c == MATCH_YES)
5007 if (peek_char != '(')
5009 gfc_error ("Missing required parentheses before BIND(C) at %C");
5012 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
5017 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5018 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
5023 /* An entry in a function.
5024 We need to take special care because writing
5029 ENTRY f() RESULT (r)
5031 ENTRY f RESULT (r). */
5032 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
5035 old_loc = gfc_current_locus;
5036 if (gfc_match_eos () == MATCH_YES)
5038 gfc_current_locus = old_loc;
5039 /* Match the empty argument list, and add the interface to
5041 m = gfc_match_formal_arglist (entry, 0, 1);
5044 m = gfc_match_formal_arglist (entry, 0, 0);
5051 if (gfc_match_eos () == MATCH_YES)
5053 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5054 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5057 entry->result = entry;
5061 m = gfc_match_suffix (entry, &result);
5063 gfc_syntax_error (ST_ENTRY);
5069 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5070 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5071 || gfc_add_function (&entry->attr, result->name, NULL)
5074 entry->result = result;
5078 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5079 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5081 entry->result = entry;
5086 if (gfc_match_eos () != MATCH_YES)
5088 gfc_syntax_error (ST_ENTRY);
5092 entry->attr.recursive = proc->attr.recursive;
5093 entry->attr.elemental = proc->attr.elemental;
5094 entry->attr.pure = proc->attr.pure;
5096 el = gfc_get_entry_list ();
5098 el->next = gfc_current_ns->entries;
5099 gfc_current_ns->entries = el;
5101 el->id = el->next->id + 1;
5105 new_st.op = EXEC_ENTRY;
5106 new_st.ext.entry = el;
5112 /* Match a subroutine statement, including optional prefixes. */
5115 gfc_match_subroutine (void)
5117 char name[GFC_MAX_SYMBOL_LEN + 1];
5122 bool allow_binding_name;
5124 if (gfc_current_state () != COMP_NONE
5125 && gfc_current_state () != COMP_INTERFACE
5126 && gfc_current_state () != COMP_CONTAINS)
5129 m = gfc_match_prefix (NULL);
5133 m = gfc_match ("subroutine% %n", name);
5137 if (get_proc_name (name, &sym, false))
5140 if (add_hidden_procptr_result (sym) == SUCCESS)
5143 gfc_new_block = sym;
5145 /* Check what next non-whitespace character is so we can tell if there
5146 is the required parens if we have a BIND(C). */
5147 gfc_gobble_whitespace ();
5148 peek_char = gfc_peek_ascii_char ();
5150 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5153 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5156 /* Make sure that it isn't already declared as BIND(C). If it is, it
5157 must have been marked BIND(C) with a BIND(C) attribute and that is
5158 not allowed for procedures. */
5159 if (sym->attr.is_bind_c == 1)
5161 sym->attr.is_bind_c = 0;
5162 if (sym->old_symbol != NULL)
5163 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5164 "variables or common blocks",
5165 &(sym->old_symbol->declared_at));
5167 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5168 "variables or common blocks", &gfc_current_locus);
5171 /* C binding names are not allowed for internal procedures. */
5172 if (gfc_current_state () == COMP_CONTAINS
5173 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5174 allow_binding_name = false;
5176 allow_binding_name = true;
5178 /* Here, we are just checking if it has the bind(c) attribute, and if
5179 so, then we need to make sure it's all correct. If it doesn't,
5180 we still need to continue matching the rest of the subroutine line. */
5181 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5182 if (is_bind_c == MATCH_ERROR)
5184 /* There was an attempt at the bind(c), but it was wrong. An
5185 error message should have been printed w/in the gfc_match_bind_c
5186 so here we'll just return the MATCH_ERROR. */
5190 if (is_bind_c == MATCH_YES)
5192 /* The following is allowed in the Fortran 2008 draft. */
5193 if (gfc_current_state () == COMP_CONTAINS
5194 && sym->ns->proc_name->attr.flavor != FL_MODULE
5195 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5196 "at %L may not be specified for an internal "
5197 "procedure", &gfc_current_locus)
5201 if (peek_char != '(')
5203 gfc_error ("Missing required parentheses before BIND(C) at %C");
5206 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5211 if (gfc_match_eos () != MATCH_YES)
5213 gfc_syntax_error (ST_SUBROUTINE);
5217 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5220 /* Warn if it has the same name as an intrinsic. */
5221 warn_intrinsic_shadow (sym, false);
5227 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5228 given, and set the binding label in either the given symbol (if not
5229 NULL), or in the current_ts. The symbol may be NULL because we may
5230 encounter the BIND(C) before the declaration itself. Return
5231 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5232 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5233 or MATCH_YES if the specifier was correct and the binding label and
5234 bind(c) fields were set correctly for the given symbol or the
5235 current_ts. If allow_binding_name is false, no binding name may be
5239 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5241 /* binding label, if exists */
5242 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5246 /* Initialize the flag that specifies whether we encountered a NAME=
5247 specifier or not. */
5248 has_name_equals = 0;
5250 /* Init the first char to nil so we can catch if we don't have
5251 the label (name attr) or the symbol name yet. */
5252 binding_label[0] = '\0';
5254 /* This much we have to be able to match, in this order, if
5255 there is a bind(c) label. */
5256 if (gfc_match (" bind ( c ") != MATCH_YES)
5259 /* Now see if there is a binding label, or if we've reached the
5260 end of the bind(c) attribute without one. */
5261 if (gfc_match_char (',') == MATCH_YES)
5263 if (gfc_match (" name = ") != MATCH_YES)
5265 gfc_error ("Syntax error in NAME= specifier for binding label "
5267 /* should give an error message here */
5271 has_name_equals = 1;
5273 /* Get the opening quote. */
5274 double_quote = MATCH_YES;
5275 single_quote = MATCH_YES;
5276 double_quote = gfc_match_char ('"');
5277 if (double_quote != MATCH_YES)
5278 single_quote = gfc_match_char ('\'');
5279 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5281 gfc_error ("Syntax error in NAME= specifier for binding label "
5286 /* Grab the binding label, using functions that will not lower
5287 case the names automatically. */
5288 if (gfc_match_name_C (binding_label) != MATCH_YES)
5291 /* Get the closing quotation. */
5292 if (double_quote == MATCH_YES)
5294 if (gfc_match_char ('"') != MATCH_YES)
5296 gfc_error ("Missing closing quote '\"' for binding label at %C");
5297 /* User started string with '"' so looked to match it. */
5303 if (gfc_match_char ('\'') != MATCH_YES)
5305 gfc_error ("Missing closing quote '\'' for binding label at %C");
5306 /* User started string with "'" char. */
5312 /* Get the required right paren. */
5313 if (gfc_match_char (')') != MATCH_YES)
5315 gfc_error ("Missing closing paren for binding label at %C");
5319 if (has_name_equals && !allow_binding_name)
5321 gfc_error ("No binding name is allowed in BIND(C) at %C");
5325 if (has_name_equals && sym != NULL && sym->attr.dummy)
5327 gfc_error ("For dummy procedure %s, no binding name is "
5328 "allowed in BIND(C) at %C", sym->name);
5333 /* Save the binding label to the symbol. If sym is null, we're
5334 probably matching the typespec attributes of a declaration and
5335 haven't gotten the name yet, and therefore, no symbol yet. */
5336 if (binding_label[0] != '\0')
5340 strcpy (sym->binding_label, binding_label);
5343 strcpy (curr_binding_label, binding_label);
5345 else if (allow_binding_name)
5347 /* No binding label, but if symbol isn't null, we
5348 can set the label for it here.
5349 If name="" or allow_binding_name is false, no C binding name is
5351 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5352 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5355 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5356 && current_interface.type == INTERFACE_ABSTRACT)
5358 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5366 /* Return nonzero if we're currently compiling a contained procedure. */
5369 contained_procedure (void)
5371 gfc_state_data *s = gfc_state_stack;
5373 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5374 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5380 /* Set the kind of each enumerator. The kind is selected such that it is
5381 interoperable with the corresponding C enumeration type, making
5382 sure that -fshort-enums is honored. */
5387 enumerator_history *current_history = NULL;
5391 if (max_enum == NULL || enum_history == NULL)
5394 if (!flag_short_enums)
5400 kind = gfc_integer_kinds[i++].kind;
5402 while (kind < gfc_c_int_kind
5403 && gfc_check_integer_range (max_enum->initializer->value.integer,
5406 current_history = enum_history;
5407 while (current_history != NULL)
5409 current_history->sym->ts.kind = kind;
5410 current_history = current_history->next;
5415 /* Match any of the various end-block statements. Returns the type of
5416 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5417 and END BLOCK statements cannot be replaced by a single END statement. */
5420 gfc_match_end (gfc_statement *st)
5422 char name[GFC_MAX_SYMBOL_LEN + 1];
5423 gfc_compile_state state;
5425 const char *block_name;
5430 old_loc = gfc_current_locus;
5431 if (gfc_match ("end") != MATCH_YES)
5434 state = gfc_current_state ();
5435 block_name = gfc_current_block () == NULL
5436 ? NULL : gfc_current_block ()->name;
5438 if (state == COMP_BLOCK && !strcmp (block_name, "block@"))
5441 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5443 state = gfc_state_stack->previous->state;
5444 block_name = gfc_state_stack->previous->sym == NULL
5445 ? NULL : gfc_state_stack->previous->sym->name;
5452 *st = ST_END_PROGRAM;
5453 target = " program";
5457 case COMP_SUBROUTINE:
5458 *st = ST_END_SUBROUTINE;
5459 target = " subroutine";
5460 eos_ok = !contained_procedure ();
5464 *st = ST_END_FUNCTION;
5465 target = " function";
5466 eos_ok = !contained_procedure ();
5469 case COMP_BLOCK_DATA:
5470 *st = ST_END_BLOCK_DATA;
5471 target = " block data";
5476 *st = ST_END_MODULE;
5481 case COMP_INTERFACE:
5482 *st = ST_END_INTERFACE;
5483 target = " interface";
5488 case COMP_DERIVED_CONTAINS:
5513 case COMP_SELECT_TYPE:
5514 *st = ST_END_SELECT;
5520 *st = ST_END_FORALL;
5535 last_initializer = NULL;
5537 gfc_free_enum_history ();
5541 gfc_error ("Unexpected END statement at %C");
5545 if (gfc_match_eos () == MATCH_YES)
5549 /* We would have required END [something]. */
5550 gfc_error ("%s statement expected at %L",
5551 gfc_ascii_statement (*st), &old_loc);
5558 /* Verify that we've got the sort of end-block that we're expecting. */
5559 if (gfc_match (target) != MATCH_YES)
5561 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5565 /* If we're at the end, make sure a block name wasn't required. */
5566 if (gfc_match_eos () == MATCH_YES)
5569 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5570 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK)
5576 gfc_error ("Expected block name of '%s' in %s statement at %C",
5577 block_name, gfc_ascii_statement (*st));
5582 /* END INTERFACE has a special handler for its several possible endings. */
5583 if (*st == ST_END_INTERFACE)
5584 return gfc_match_end_interface ();
5586 /* We haven't hit the end of statement, so what is left must be an
5588 m = gfc_match_space ();
5590 m = gfc_match_name (name);
5593 gfc_error ("Expected terminating name at %C");
5597 if (block_name == NULL)
5600 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5602 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5603 gfc_ascii_statement (*st));
5606 /* Procedure pointer as function result. */
5607 else if (strcmp (block_name, "ppr@") == 0
5608 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5610 gfc_error ("Expected label '%s' for %s statement at %C",
5611 gfc_current_block ()->ns->proc_name->name,
5612 gfc_ascii_statement (*st));
5616 if (gfc_match_eos () == MATCH_YES)
5620 gfc_syntax_error (*st);
5623 gfc_current_locus = old_loc;
5629 /***************** Attribute declaration statements ****************/
5631 /* Set the attribute of a single variable. */
5636 char name[GFC_MAX_SYMBOL_LEN + 1];
5644 m = gfc_match_name (name);
5648 if (find_special (name, &sym, false))
5651 var_locus = gfc_current_locus;
5653 /* Deal with possible array specification for certain attributes. */
5654 if (current_attr.dimension
5655 || current_attr.allocatable
5656 || current_attr.pointer
5657 || current_attr.target)
5659 m = gfc_match_array_spec (&as);
5660 if (m == MATCH_ERROR)
5663 if (current_attr.dimension && m == MATCH_NO)
5665 gfc_error ("Missing array specification at %L in DIMENSION "
5666 "statement", &var_locus);
5671 if (current_attr.dimension && sym->value)
5673 gfc_error ("Dimensions specified for %s at %L after its "
5674 "initialisation", sym->name, &var_locus);
5679 if ((current_attr.allocatable || current_attr.pointer)
5680 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5682 gfc_error ("Array specification must be deferred at %L", &var_locus);
5688 /* Update symbol table. DIMENSION attribute is set
5689 in gfc_set_array_spec(). */
5690 if (current_attr.dimension == 0
5691 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5697 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5703 if (sym->attr.cray_pointee && sym->as != NULL)
5705 /* Fix the array spec. */
5706 m = gfc_mod_pointee_as (sym->as);
5707 if (m == MATCH_ERROR)
5711 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5717 if ((current_attr.external || current_attr.intrinsic)
5718 && sym->attr.flavor != FL_PROCEDURE
5719 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5725 add_hidden_procptr_result (sym);
5730 gfc_free_array_spec (as);
5735 /* Generic attribute declaration subroutine. Used for attributes that
5736 just have a list of names. */
5743 /* Gobble the optional double colon, by simply ignoring the result
5753 if (gfc_match_eos () == MATCH_YES)
5759 if (gfc_match_char (',') != MATCH_YES)
5761 gfc_error ("Unexpected character in variable list at %C");
5771 /* This routine matches Cray Pointer declarations of the form:
5772 pointer ( <pointer>, <pointee> )
5774 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5775 The pointer, if already declared, should be an integer. Otherwise, we
5776 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5777 be either a scalar, or an array declaration. No space is allocated for
5778 the pointee. For the statement
5779 pointer (ipt, ar(10))
5780 any subsequent uses of ar will be translated (in C-notation) as
5781 ar(i) => ((<type> *) ipt)(i)
5782 After gimplification, pointee variable will disappear in the code. */
5785 cray_pointer_decl (void)
5789 gfc_symbol *cptr; /* Pointer symbol. */
5790 gfc_symbol *cpte; /* Pointee symbol. */
5796 if (gfc_match_char ('(') != MATCH_YES)
5798 gfc_error ("Expected '(' at %C");
5802 /* Match pointer. */
5803 var_locus = gfc_current_locus;
5804 gfc_clear_attr (¤t_attr);
5805 gfc_add_cray_pointer (¤t_attr, &var_locus);
5806 current_ts.type = BT_INTEGER;
5807 current_ts.kind = gfc_index_integer_kind;
5809 m = gfc_match_symbol (&cptr, 0);
5812 gfc_error ("Expected variable name at %C");
5816 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5819 gfc_set_sym_referenced (cptr);
5821 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5823 cptr->ts.type = BT_INTEGER;
5824 cptr->ts.kind = gfc_index_integer_kind;
5826 else if (cptr->ts.type != BT_INTEGER)
5828 gfc_error ("Cray pointer at %C must be an integer");
5831 else if (cptr->ts.kind < gfc_index_integer_kind)
5832 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5833 " memory addresses require %d bytes",
5834 cptr->ts.kind, gfc_index_integer_kind);
5836 if (gfc_match_char (',') != MATCH_YES)
5838 gfc_error ("Expected \",\" at %C");
5842 /* Match Pointee. */
5843 var_locus = gfc_current_locus;
5844 gfc_clear_attr (¤t_attr);
5845 gfc_add_cray_pointee (¤t_attr, &var_locus);
5846 current_ts.type = BT_UNKNOWN;
5847 current_ts.kind = 0;
5849 m = gfc_match_symbol (&cpte, 0);
5852 gfc_error ("Expected variable name at %C");
5856 /* Check for an optional array spec. */
5857 m = gfc_match_array_spec (&as);
5858 if (m == MATCH_ERROR)
5860 gfc_free_array_spec (as);
5863 else if (m == MATCH_NO)
5865 gfc_free_array_spec (as);
5869 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5872 gfc_set_sym_referenced (cpte);
5874 if (cpte->as == NULL)
5876 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5877 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5879 else if (as != NULL)
5881 gfc_error ("Duplicate array spec for Cray pointee at %C");
5882 gfc_free_array_spec (as);
5888 if (cpte->as != NULL)
5890 /* Fix array spec. */
5891 m = gfc_mod_pointee_as (cpte->as);
5892 if (m == MATCH_ERROR)
5896 /* Point the Pointee at the Pointer. */
5897 cpte->cp_pointer = cptr;
5899 if (gfc_match_char (')') != MATCH_YES)
5901 gfc_error ("Expected \")\" at %C");
5904 m = gfc_match_char (',');
5906 done = true; /* Stop searching for more declarations. */
5910 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5911 || gfc_match_eos () != MATCH_YES)
5913 gfc_error ("Expected \",\" or end of statement at %C");
5921 gfc_match_external (void)
5924 gfc_clear_attr (¤t_attr);
5925 current_attr.external = 1;
5927 return attr_decl ();
5932 gfc_match_intent (void)
5936 /* This is not allowed within a BLOCK construct! */
5937 if (gfc_current_state () == COMP_BLOCK)
5939 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
5943 intent = match_intent_spec ();
5944 if (intent == INTENT_UNKNOWN)
5947 gfc_clear_attr (¤t_attr);
5948 current_attr.intent = intent;
5950 return attr_decl ();
5955 gfc_match_intrinsic (void)
5958 gfc_clear_attr (¤t_attr);
5959 current_attr.intrinsic = 1;
5961 return attr_decl ();
5966 gfc_match_optional (void)
5968 /* This is not allowed within a BLOCK construct! */
5969 if (gfc_current_state () == COMP_BLOCK)
5971 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
5975 gfc_clear_attr (¤t_attr);
5976 current_attr.optional = 1;
5978 return attr_decl ();
5983 gfc_match_pointer (void)
5985 gfc_gobble_whitespace ();
5986 if (gfc_peek_ascii_char () == '(')
5988 if (!gfc_option.flag_cray_pointer)
5990 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5994 return cray_pointer_decl ();
5998 gfc_clear_attr (¤t_attr);
5999 current_attr.pointer = 1;
6001 return attr_decl ();
6007 gfc_match_allocatable (void)
6009 gfc_clear_attr (¤t_attr);
6010 current_attr.allocatable = 1;
6012 return attr_decl ();
6017 gfc_match_dimension (void)
6019 gfc_clear_attr (¤t_attr);
6020 current_attr.dimension = 1;
6022 return attr_decl ();
6027 gfc_match_target (void)
6029 gfc_clear_attr (¤t_attr);
6030 current_attr.target = 1;
6032 return attr_decl ();
6036 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6040 access_attr_decl (gfc_statement st)
6042 char name[GFC_MAX_SYMBOL_LEN + 1];
6043 interface_type type;
6046 gfc_intrinsic_op op;
6049 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6054 m = gfc_match_generic_spec (&type, name, &op);
6057 if (m == MATCH_ERROR)
6062 case INTERFACE_NAMELESS:
6063 case INTERFACE_ABSTRACT:
6066 case INTERFACE_GENERIC:
6067 if (gfc_get_symbol (name, NULL, &sym))
6070 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6071 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6072 sym->name, NULL) == FAILURE)
6077 case INTERFACE_INTRINSIC_OP:
6078 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6080 gfc_current_ns->operator_access[op] =
6081 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6085 gfc_error ("Access specification of the %s operator at %C has "
6086 "already been specified", gfc_op2string (op));
6092 case INTERFACE_USER_OP:
6093 uop = gfc_get_uop (name);
6095 if (uop->access == ACCESS_UNKNOWN)
6097 uop->access = (st == ST_PUBLIC)
6098 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6102 gfc_error ("Access specification of the .%s. operator at %C "
6103 "has already been specified", sym->name);
6110 if (gfc_match_char (',') == MATCH_NO)
6114 if (gfc_match_eos () != MATCH_YES)
6119 gfc_syntax_error (st);
6127 gfc_match_protected (void)
6132 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6134 gfc_error ("PROTECTED at %C only allowed in specification "
6135 "part of a module");
6140 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6144 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6149 if (gfc_match_eos () == MATCH_YES)
6154 m = gfc_match_symbol (&sym, 0);
6158 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6171 if (gfc_match_eos () == MATCH_YES)
6173 if (gfc_match_char (',') != MATCH_YES)
6180 gfc_error ("Syntax error in PROTECTED statement at %C");
6185 /* The PRIVATE statement is a bit weird in that it can be an attribute
6186 declaration, but also works as a standalone statement inside of a
6187 type declaration or a module. */
6190 gfc_match_private (gfc_statement *st)
6193 if (gfc_match ("private") != MATCH_YES)
6196 if (gfc_current_state () != COMP_MODULE
6197 && !(gfc_current_state () == COMP_DERIVED
6198 && gfc_state_stack->previous
6199 && gfc_state_stack->previous->state == COMP_MODULE)
6200 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6201 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6202 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6204 gfc_error ("PRIVATE statement at %C is only allowed in the "
6205 "specification part of a module");
6209 if (gfc_current_state () == COMP_DERIVED)
6211 if (gfc_match_eos () == MATCH_YES)
6217 gfc_syntax_error (ST_PRIVATE);
6221 if (gfc_match_eos () == MATCH_YES)
6228 return access_attr_decl (ST_PRIVATE);
6233 gfc_match_public (gfc_statement *st)
6236 if (gfc_match ("public") != MATCH_YES)
6239 if (gfc_current_state () != COMP_MODULE)
6241 gfc_error ("PUBLIC statement at %C is only allowed in the "
6242 "specification part of a module");
6246 if (gfc_match_eos () == MATCH_YES)
6253 return access_attr_decl (ST_PUBLIC);
6257 /* Workhorse for gfc_match_parameter. */
6267 m = gfc_match_symbol (&sym, 0);
6269 gfc_error ("Expected variable name at %C in PARAMETER statement");
6274 if (gfc_match_char ('=') == MATCH_NO)
6276 gfc_error ("Expected = sign in PARAMETER statement at %C");
6280 m = gfc_match_init_expr (&init);
6282 gfc_error ("Expected expression at %C in PARAMETER statement");
6286 if (sym->ts.type == BT_UNKNOWN
6287 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6293 if (gfc_check_assign_symbol (sym, init) == FAILURE
6294 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6302 gfc_error ("Initializing already initialized variable at %C");
6307 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6308 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6311 gfc_free_expr (init);
6316 /* Match a parameter statement, with the weird syntax that these have. */
6319 gfc_match_parameter (void)
6323 if (gfc_match_char ('(') == MATCH_NO)
6332 if (gfc_match (" )%t") == MATCH_YES)
6335 if (gfc_match_char (',') != MATCH_YES)
6337 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6347 /* Save statements have a special syntax. */
6350 gfc_match_save (void)
6352 char n[GFC_MAX_SYMBOL_LEN+1];
6357 if (gfc_match_eos () == MATCH_YES)
6359 if (gfc_current_ns->seen_save)
6361 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6362 "follows previous SAVE statement")
6367 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6371 if (gfc_current_ns->save_all)
6373 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6374 "blanket SAVE statement")
6383 m = gfc_match_symbol (&sym, 0);
6387 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6399 m = gfc_match (" / %n /", &n);
6400 if (m == MATCH_ERROR)
6405 c = gfc_get_common (n, 0);
6408 gfc_current_ns->seen_save = 1;
6411 if (gfc_match_eos () == MATCH_YES)
6413 if (gfc_match_char (',') != MATCH_YES)
6420 gfc_error ("Syntax error in SAVE statement at %C");
6426 gfc_match_value (void)
6431 /* This is not allowed within a BLOCK construct! */
6432 if (gfc_current_state () == COMP_BLOCK)
6434 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6438 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6442 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6447 if (gfc_match_eos () == MATCH_YES)
6452 m = gfc_match_symbol (&sym, 0);
6456 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6469 if (gfc_match_eos () == MATCH_YES)
6471 if (gfc_match_char (',') != MATCH_YES)
6478 gfc_error ("Syntax error in VALUE statement at %C");
6484 gfc_match_volatile (void)
6489 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6493 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6498 if (gfc_match_eos () == MATCH_YES)
6503 /* VOLATILE is special because it can be added to host-associated
6505 m = gfc_match_symbol (&sym, 1);
6509 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6522 if (gfc_match_eos () == MATCH_YES)
6524 if (gfc_match_char (',') != MATCH_YES)
6531 gfc_error ("Syntax error in VOLATILE statement at %C");
6536 /* Match a module procedure statement. Note that we have to modify
6537 symbols in the parent's namespace because the current one was there
6538 to receive symbols that are in an interface's formal argument list. */
6541 gfc_match_modproc (void)
6543 char name[GFC_MAX_SYMBOL_LEN + 1];
6546 gfc_namespace *module_ns;
6547 gfc_interface *old_interface_head, *interface;
6549 if (gfc_state_stack->state != COMP_INTERFACE
6550 || gfc_state_stack->previous == NULL
6551 || current_interface.type == INTERFACE_NAMELESS
6552 || current_interface.type == INTERFACE_ABSTRACT)
6554 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6559 module_ns = gfc_current_ns->parent;
6560 for (; module_ns; module_ns = module_ns->parent)
6561 if (module_ns->proc_name->attr.flavor == FL_MODULE
6562 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6563 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6564 && !module_ns->proc_name->attr.contained))
6567 if (module_ns == NULL)
6570 /* Store the current state of the interface. We will need it if we
6571 end up with a syntax error and need to recover. */
6572 old_interface_head = gfc_current_interface_head ();
6576 locus old_locus = gfc_current_locus;
6579 m = gfc_match_name (name);
6585 /* Check for syntax error before starting to add symbols to the
6586 current namespace. */
6587 if (gfc_match_eos () == MATCH_YES)
6589 if (!last && gfc_match_char (',') != MATCH_YES)
6592 /* Now we're sure the syntax is valid, we process this item
6594 if (gfc_get_symbol (name, module_ns, &sym))
6597 if (sym->attr.intrinsic)
6599 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6600 "PROCEDURE", &old_locus);
6604 if (sym->attr.proc != PROC_MODULE
6605 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6606 sym->name, NULL) == FAILURE)
6609 if (gfc_add_interface (sym) == FAILURE)
6612 sym->attr.mod_proc = 1;
6613 sym->declared_at = old_locus;
6622 /* Restore the previous state of the interface. */
6623 interface = gfc_current_interface_head ();
6624 gfc_set_current_interface_head (old_interface_head);
6626 /* Free the new interfaces. */
6627 while (interface != old_interface_head)
6629 gfc_interface *i = interface->next;
6630 gfc_free (interface);
6634 /* And issue a syntax error. */
6635 gfc_syntax_error (ST_MODULE_PROC);
6640 /* Check a derived type that is being extended. */
6642 check_extended_derived_type (char *name)
6644 gfc_symbol *extended;
6646 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6648 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6654 gfc_error ("No such symbol in TYPE definition at %C");
6658 if (extended->attr.flavor != FL_DERIVED)
6660 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6661 "derived type", name);
6665 if (extended->attr.is_bind_c)
6667 gfc_error ("'%s' cannot be extended at %C because it "
6668 "is BIND(C)", extended->name);
6672 if (extended->attr.sequence)
6674 gfc_error ("'%s' cannot be extended at %C because it "
6675 "is a SEQUENCE type", extended->name);
6683 /* Match the optional attribute specifiers for a type declaration.
6684 Return MATCH_ERROR if an error is encountered in one of the handled
6685 attributes (public, private, bind(c)), MATCH_NO if what's found is
6686 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6687 checking on attribute conflicts needs to be done. */
6690 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6692 /* See if the derived type is marked as private. */
6693 if (gfc_match (" , private") == MATCH_YES)
6695 if (gfc_current_state () != COMP_MODULE)
6697 gfc_error ("Derived type at %C can only be PRIVATE in the "
6698 "specification part of a module");
6702 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6705 else if (gfc_match (" , public") == MATCH_YES)
6707 if (gfc_current_state () != COMP_MODULE)
6709 gfc_error ("Derived type at %C can only be PUBLIC in the "
6710 "specification part of a module");
6714 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6717 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6719 /* If the type is defined to be bind(c) it then needs to make
6720 sure that all fields are interoperable. This will
6721 need to be a semantic check on the finished derived type.
6722 See 15.2.3 (lines 9-12) of F2003 draft. */
6723 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6726 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6728 else if (gfc_match (" , abstract") == MATCH_YES)
6730 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6734 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6737 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6739 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6745 /* If we get here, something matched. */
6750 /* Counter for assigning a unique vindex number to each derived type. */
6751 static int vindex_counter = 0;
6754 /* Match the beginning of a derived type declaration. If a type name
6755 was the result of a function, then it is possible to have a symbol
6756 already to be known as a derived type yet have no components. */
6759 gfc_match_derived_decl (void)
6761 char name[GFC_MAX_SYMBOL_LEN + 1];
6762 char parent[GFC_MAX_SYMBOL_LEN + 1];
6763 symbol_attribute attr;
6765 gfc_symbol *extended;
6767 match is_type_attr_spec = MATCH_NO;
6768 bool seen_attr = false;
6770 if (gfc_current_state () == COMP_DERIVED)
6775 gfc_clear_attr (&attr);
6780 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6781 if (is_type_attr_spec == MATCH_ERROR)
6783 if (is_type_attr_spec == MATCH_YES)
6785 } while (is_type_attr_spec == MATCH_YES);
6787 /* Deal with derived type extensions. The extension attribute has
6788 been added to 'attr' but now the parent type must be found and
6791 extended = check_extended_derived_type (parent);
6793 if (parent[0] && !extended)
6796 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6798 gfc_error ("Expected :: in TYPE definition at %C");
6802 m = gfc_match (" %n%t", name);
6806 /* Make sure the name is not the name of an intrinsic type. */
6807 if (gfc_is_intrinsic_typename (name))
6809 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6814 if (gfc_get_symbol (name, NULL, &sym))
6817 if (sym->ts.type != BT_UNKNOWN)
6819 gfc_error ("Derived type name '%s' at %C already has a basic type "
6820 "of %s", sym->name, gfc_typename (&sym->ts));
6824 /* The symbol may already have the derived attribute without the
6825 components. The ways this can happen is via a function
6826 definition, an INTRINSIC statement or a subtype in another
6827 derived type that is a pointer. The first part of the AND clause
6828 is true if the symbol is not the return value of a function. */
6829 if (sym->attr.flavor != FL_DERIVED
6830 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6833 if (sym->components != NULL || sym->attr.zero_comp)
6835 gfc_error ("Derived type definition of '%s' at %C has already been "
6836 "defined", sym->name);
6840 if (attr.access != ACCESS_UNKNOWN
6841 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6844 /* See if the derived type was labeled as bind(c). */
6845 if (attr.is_bind_c != 0)
6846 sym->attr.is_bind_c = attr.is_bind_c;
6848 /* Construct the f2k_derived namespace if it is not yet there. */
6849 if (!sym->f2k_derived)
6850 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6852 if (extended && !sym->components)
6857 /* Add the extended derived type as the first component. */
6858 gfc_add_component (sym, parent, &p);
6859 sym->attr.extension = attr.extension;
6861 gfc_set_sym_referenced (extended);
6863 p->ts.type = BT_DERIVED;
6864 p->ts.u.derived = extended;
6865 p->initializer = gfc_default_initializer (&p->ts);
6867 /* Provide the links between the extended type and its extension. */
6868 if (!extended->f2k_derived)
6869 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6870 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6875 /* Set the vindex for this type and increment the counter. */
6876 sym->vindex = ++vindex_counter;
6878 /* Take over the ABSTRACT attribute. */
6879 sym->attr.abstract = attr.abstract;
6881 gfc_new_block = sym;
6887 /* Cray Pointees can be declared as:
6888 pointer (ipt, a (n,m,...,*))
6889 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6890 cheat and set a constant bound of 1 for the last dimension, if this
6891 is the case. Since there is no bounds-checking for Cray Pointees,
6892 this will be okay. */
6895 gfc_mod_pointee_as (gfc_array_spec *as)
6897 as->cray_pointee = true; /* This will be useful to know later. */
6898 if (as->type == AS_ASSUMED_SIZE)
6900 as->type = AS_EXPLICIT;
6901 as->upper[as->rank - 1] = gfc_int_expr (1);
6902 as->cp_was_assumed = true;
6904 else if (as->type == AS_ASSUMED_SHAPE)
6906 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6913 /* Match the enum definition statement, here we are trying to match
6914 the first line of enum definition statement.
6915 Returns MATCH_YES if match is found. */
6918 gfc_match_enum (void)
6922 m = gfc_match_eos ();
6926 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6934 /* Returns an initializer whose value is one higher than the value of the
6935 LAST_INITIALIZER argument. If the argument is NULL, the
6936 initializers value will be set to zero. The initializer's kind
6937 will be set to gfc_c_int_kind.
6939 If -fshort-enums is given, the appropriate kind will be selected
6940 later after all enumerators have been parsed. A warning is issued
6941 here if an initializer exceeds gfc_c_int_kind. */
6944 enum_initializer (gfc_expr *last_initializer, locus where)
6948 result = gfc_get_expr ();
6949 result->expr_type = EXPR_CONSTANT;
6950 result->ts.type = BT_INTEGER;
6951 result->ts.kind = gfc_c_int_kind;
6952 result->where = where;
6954 mpz_init (result->value.integer);
6956 if (last_initializer != NULL)
6958 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
6959 result->where = last_initializer->where;
6961 if (gfc_check_integer_range (result->value.integer,
6962 gfc_c_int_kind) != ARITH_OK)
6964 gfc_error ("Enumerator exceeds the C integer type at %C");
6970 /* Control comes here, if it's the very first enumerator and no
6971 initializer has been given. It will be initialized to zero. */
6972 mpz_set_si (result->value.integer, 0);
6979 /* Match a variable name with an optional initializer. When this
6980 subroutine is called, a variable is expected to be parsed next.
6981 Depending on what is happening at the moment, updates either the
6982 symbol table or the current interface. */
6985 enumerator_decl (void)
6987 char name[GFC_MAX_SYMBOL_LEN + 1];
6988 gfc_expr *initializer;
6989 gfc_array_spec *as = NULL;
6997 old_locus = gfc_current_locus;
6999 /* When we get here, we've just matched a list of attributes and
7000 maybe a type and a double colon. The next thing we expect to see
7001 is the name of the symbol. */
7002 m = gfc_match_name (name);
7006 var_locus = gfc_current_locus;
7008 /* OK, we've successfully matched the declaration. Now put the
7009 symbol in the current namespace. If we fail to create the symbol,
7011 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7017 /* The double colon must be present in order to have initializers.
7018 Otherwise the statement is ambiguous with an assignment statement. */
7021 if (gfc_match_char ('=') == MATCH_YES)
7023 m = gfc_match_init_expr (&initializer);
7026 gfc_error ("Expected an initialization expression at %C");
7035 /* If we do not have an initializer, the initialization value of the
7036 previous enumerator (stored in last_initializer) is incremented
7037 by 1 and is used to initialize the current enumerator. */
7038 if (initializer == NULL)
7039 initializer = enum_initializer (last_initializer, old_locus);
7041 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7043 gfc_error("ENUMERATOR %L not initialized with integer expression",
7046 gfc_free_enum_history ();
7050 /* Store this current initializer, for the next enumerator variable
7051 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7052 use last_initializer below. */
7053 last_initializer = initializer;
7054 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7056 /* Maintain enumerator history. */
7057 gfc_find_symbol (name, NULL, 0, &sym);
7058 create_enum_history (sym, last_initializer);
7060 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7063 /* Free stuff up and return. */
7064 gfc_free_expr (initializer);
7070 /* Match the enumerator definition statement. */
7073 gfc_match_enumerator_def (void)
7078 gfc_clear_ts (¤t_ts);
7080 m = gfc_match (" enumerator");
7084 m = gfc_match (" :: ");
7085 if (m == MATCH_ERROR)
7088 colon_seen = (m == MATCH_YES);
7090 if (gfc_current_state () != COMP_ENUM)
7092 gfc_error ("ENUM definition statement expected before %C");
7093 gfc_free_enum_history ();
7097 (¤t_ts)->type = BT_INTEGER;
7098 (¤t_ts)->kind = gfc_c_int_kind;
7100 gfc_clear_attr (¤t_attr);
7101 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7110 m = enumerator_decl ();
7111 if (m == MATCH_ERROR)
7116 if (gfc_match_eos () == MATCH_YES)
7118 if (gfc_match_char (',') != MATCH_YES)
7122 if (gfc_current_state () == COMP_ENUM)
7124 gfc_free_enum_history ();
7125 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7130 gfc_free_array_spec (current_as);
7137 /* Match binding attributes. */
7140 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7142 bool found_passing = false;
7143 bool seen_ptr = false;
7144 match m = MATCH_YES;
7146 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7147 this case the defaults are in there. */
7148 ba->access = ACCESS_UNKNOWN;
7149 ba->pass_arg = NULL;
7150 ba->pass_arg_num = 0;
7152 ba->non_overridable = 0;
7156 /* If we find a comma, we believe there are binding attributes. */
7157 m = gfc_match_char (',');
7163 /* Access specifier. */
7165 m = gfc_match (" public");
7166 if (m == MATCH_ERROR)
7170 if (ba->access != ACCESS_UNKNOWN)
7172 gfc_error ("Duplicate access-specifier at %C");
7176 ba->access = ACCESS_PUBLIC;
7180 m = gfc_match (" private");
7181 if (m == MATCH_ERROR)
7185 if (ba->access != ACCESS_UNKNOWN)
7187 gfc_error ("Duplicate access-specifier at %C");
7191 ba->access = ACCESS_PRIVATE;
7195 /* If inside GENERIC, the following is not allowed. */
7200 m = gfc_match (" nopass");
7201 if (m == MATCH_ERROR)
7207 gfc_error ("Binding attributes already specify passing,"
7208 " illegal NOPASS at %C");
7212 found_passing = true;
7217 /* PASS possibly including argument. */
7218 m = gfc_match (" pass");
7219 if (m == MATCH_ERROR)
7223 char arg[GFC_MAX_SYMBOL_LEN + 1];
7227 gfc_error ("Binding attributes already specify passing,"
7228 " illegal PASS at %C");
7232 m = gfc_match (" ( %n )", arg);
7233 if (m == MATCH_ERROR)
7236 ba->pass_arg = gfc_get_string (arg);
7237 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7239 found_passing = true;
7247 m = gfc_match (" pointer");
7248 if (m == MATCH_ERROR)
7254 gfc_error ("Duplicate POINTER attribute at %C");
7264 /* NON_OVERRIDABLE flag. */
7265 m = gfc_match (" non_overridable");
7266 if (m == MATCH_ERROR)
7270 if (ba->non_overridable)
7272 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7276 ba->non_overridable = 1;
7280 /* DEFERRED flag. */
7281 m = gfc_match (" deferred");
7282 if (m == MATCH_ERROR)
7288 gfc_error ("Duplicate DEFERRED at %C");
7299 /* Nothing matching found. */
7301 gfc_error ("Expected access-specifier at %C");
7303 gfc_error ("Expected binding attribute at %C");
7306 while (gfc_match_char (',') == MATCH_YES);
7308 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7309 if (ba->non_overridable && ba->deferred)
7311 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7318 if (ba->access == ACCESS_UNKNOWN)
7319 ba->access = gfc_typebound_default_access;
7321 if (ppc && !seen_ptr)
7323 gfc_error ("POINTER attribute is required for procedure pointer component"
7335 /* Match a PROCEDURE specific binding inside a derived type. */
7338 match_procedure_in_type (void)
7340 char name[GFC_MAX_SYMBOL_LEN + 1];
7341 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7342 char* target = NULL;
7343 gfc_typebound_proc* tb;
7351 /* Check current state. */
7352 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7353 block = gfc_state_stack->previous->sym;
7356 /* Try to match PROCEDURE(interface). */
7357 if (gfc_match (" (") == MATCH_YES)
7359 m = gfc_match_name (target_buf);
7360 if (m == MATCH_ERROR)
7364 gfc_error ("Interface-name expected after '(' at %C");
7368 if (gfc_match (" )") != MATCH_YES)
7370 gfc_error ("')' expected at %C");
7374 target = target_buf;
7377 /* Construct the data structure. */
7378 tb = gfc_get_typebound_proc ();
7379 tb->where = gfc_current_locus;
7382 /* Match binding attributes. */
7383 m = match_binding_attributes (tb, false, false);
7384 if (m == MATCH_ERROR)
7386 seen_attrs = (m == MATCH_YES);
7388 /* Check that attribute DEFERRED is given iff an interface is specified, which
7389 means target != NULL. */
7390 if (tb->deferred && !target)
7392 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7395 if (target && !tb->deferred)
7397 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7401 /* Match the colons. */
7402 m = gfc_match (" ::");
7403 if (m == MATCH_ERROR)
7405 seen_colons = (m == MATCH_YES);
7406 if (seen_attrs && !seen_colons)
7408 gfc_error ("Expected '::' after binding-attributes at %C");
7412 /* Match the binding name. */
7413 m = gfc_match_name (name);
7414 if (m == MATCH_ERROR)
7418 gfc_error ("Expected binding name at %C");
7422 /* Try to match the '=> target', if it's there. */
7423 m = gfc_match (" =>");
7424 if (m == MATCH_ERROR)
7430 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7436 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7441 m = gfc_match_name (target_buf);
7442 if (m == MATCH_ERROR)
7446 gfc_error ("Expected binding target after '=>' at %C");
7449 target = target_buf;
7452 /* Now we should have the end. */
7453 m = gfc_match_eos ();
7454 if (m == MATCH_ERROR)
7458 gfc_error ("Junk after PROCEDURE declaration at %C");
7462 /* If no target was found, it has the same name as the binding. */
7466 /* Get the namespace to insert the symbols into. */
7467 ns = block->f2k_derived;
7470 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7471 if (tb->deferred && !block->attr.abstract)
7473 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7478 /* See if we already have a binding with this name in the symtree which would
7479 be an error. If a GENERIC already targetted this binding, it may be
7480 already there but then typebound is still NULL. */
7481 stree = gfc_find_symtree (ns->tb_sym_root, name);
7482 if (stree && stree->n.tb)
7484 gfc_error ("There's already a procedure with binding name '%s' for the"
7485 " derived type '%s' at %C", name, block->name);
7489 /* Insert it and set attributes. */
7493 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7498 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7500 gfc_set_sym_referenced (tb->u.specific->n.sym);
7506 /* Match a GENERIC procedure binding inside a derived type. */
7509 gfc_match_generic (void)
7511 char name[GFC_MAX_SYMBOL_LEN + 1];
7512 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7514 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7515 gfc_typebound_proc* tb;
7517 interface_type op_type;
7518 gfc_intrinsic_op op;
7521 /* Check current state. */
7522 if (gfc_current_state () == COMP_DERIVED)
7524 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7527 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7529 block = gfc_state_stack->previous->sym;
7530 ns = block->f2k_derived;
7531 gcc_assert (block && ns);
7533 /* See if we get an access-specifier. */
7534 m = match_binding_attributes (&tbattr, true, false);
7535 if (m == MATCH_ERROR)
7538 /* Now the colons, those are required. */
7539 if (gfc_match (" ::") != MATCH_YES)
7541 gfc_error ("Expected '::' at %C");
7545 /* Match the binding name; depending on type (operator / generic) format
7546 it for future error messages into bind_name. */
7548 m = gfc_match_generic_spec (&op_type, name, &op);
7549 if (m == MATCH_ERROR)
7553 gfc_error ("Expected generic name or operator descriptor at %C");
7559 case INTERFACE_GENERIC:
7560 snprintf (bind_name, sizeof (bind_name), "%s", name);
7563 case INTERFACE_USER_OP:
7564 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7567 case INTERFACE_INTRINSIC_OP:
7568 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7569 gfc_op2string (op));
7576 /* Match the required =>. */
7577 if (gfc_match (" =>") != MATCH_YES)
7579 gfc_error ("Expected '=>' at %C");
7583 /* Try to find existing GENERIC binding with this name / for this operator;
7584 if there is something, check that it is another GENERIC and then extend
7585 it rather than building a new node. Otherwise, create it and put it
7586 at the right position. */
7590 case INTERFACE_USER_OP:
7591 case INTERFACE_GENERIC:
7593 const bool is_op = (op_type == INTERFACE_USER_OP);
7596 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7608 case INTERFACE_INTRINSIC_OP:
7618 if (!tb->is_generic)
7620 gcc_assert (op_type == INTERFACE_GENERIC);
7621 gfc_error ("There's already a non-generic procedure with binding name"
7622 " '%s' for the derived type '%s' at %C",
7623 bind_name, block->name);
7627 if (tb->access != tbattr.access)
7629 gfc_error ("Binding at %C must have the same access as already"
7630 " defined binding '%s'", bind_name);
7636 tb = gfc_get_typebound_proc ();
7637 tb->where = gfc_current_locus;
7638 tb->access = tbattr.access;
7640 tb->u.generic = NULL;
7644 case INTERFACE_GENERIC:
7645 case INTERFACE_USER_OP:
7647 const bool is_op = (op_type == INTERFACE_USER_OP);
7650 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7658 case INTERFACE_INTRINSIC_OP:
7667 /* Now, match all following names as specific targets. */
7670 gfc_symtree* target_st;
7671 gfc_tbp_generic* target;
7673 m = gfc_match_name (name);
7674 if (m == MATCH_ERROR)
7678 gfc_error ("Expected specific binding name at %C");
7682 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7684 /* See if this is a duplicate specification. */
7685 for (target = tb->u.generic; target; target = target->next)
7686 if (target_st == target->specific_st)
7688 gfc_error ("'%s' already defined as specific binding for the"
7689 " generic '%s' at %C", name, bind_name);
7693 target = gfc_get_tbp_generic ();
7694 target->specific_st = target_st;
7695 target->specific = NULL;
7696 target->next = tb->u.generic;
7697 tb->u.generic = target;
7699 while (gfc_match (" ,") == MATCH_YES);
7701 /* Here should be the end. */
7702 if (gfc_match_eos () != MATCH_YES)
7704 gfc_error ("Junk after GENERIC binding at %C");
7715 /* Match a FINAL declaration inside a derived type. */
7718 gfc_match_final_decl (void)
7720 char name[GFC_MAX_SYMBOL_LEN + 1];
7723 gfc_namespace* module_ns;
7727 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7729 gfc_error ("FINAL declaration at %C must be inside a derived type "
7730 "CONTAINS section");
7734 block = gfc_state_stack->previous->sym;
7737 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7738 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7740 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7741 " specification part of a MODULE");
7745 module_ns = gfc_current_ns;
7746 gcc_assert (module_ns);
7747 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7749 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7750 if (gfc_match (" ::") == MATCH_ERROR)
7753 /* Match the sequence of procedure names. */
7760 if (first && gfc_match_eos () == MATCH_YES)
7762 gfc_error ("Empty FINAL at %C");
7766 m = gfc_match_name (name);
7769 gfc_error ("Expected module procedure name at %C");
7772 else if (m != MATCH_YES)
7775 if (gfc_match_eos () == MATCH_YES)
7777 if (!last && gfc_match_char (',') != MATCH_YES)
7779 gfc_error ("Expected ',' at %C");
7783 if (gfc_get_symbol (name, module_ns, &sym))
7785 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7789 /* Mark the symbol as module procedure. */
7790 if (sym->attr.proc != PROC_MODULE
7791 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7792 sym->name, NULL) == FAILURE)
7795 /* Check if we already have this symbol in the list, this is an error. */
7796 for (f = block->f2k_derived->finalizers; f; f = f->next)
7797 if (f->proc_sym == sym)
7799 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7804 /* Add this symbol to the list of finalizers. */
7805 gcc_assert (block->f2k_derived);
7807 f = XCNEW (gfc_finalizer);
7809 f->proc_tree = NULL;
7810 f->where = gfc_current_locus;
7811 f->next = block->f2k_derived->finalizers;
7812 block->f2k_derived->finalizers = f;
7822 const ext_attr_t ext_attr_list[] = {
7823 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7824 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7825 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7826 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7827 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7828 { NULL, EXT_ATTR_LAST, NULL }
7831 /* Match a !GCC$ ATTRIBUTES statement of the form:
7832 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7833 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7835 TODO: We should support all GCC attributes using the same syntax for
7836 the attribute list, i.e. the list in C
7837 __attributes(( attribute-list ))
7839 !GCC$ ATTRIBUTES attribute-list ::
7840 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7843 As there is absolutely no risk of confusion, we should never return
7846 gfc_match_gcc_attributes (void)
7848 symbol_attribute attr;
7849 char name[GFC_MAX_SYMBOL_LEN + 1];
7854 gfc_clear_attr (&attr);
7859 if (gfc_match_name (name) != MATCH_YES)
7862 for (id = 0; id < EXT_ATTR_LAST; id++)
7863 if (strcmp (name, ext_attr_list[id].name) == 0)
7866 if (id == EXT_ATTR_LAST)
7868 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7872 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
7876 gfc_gobble_whitespace ();
7877 ch = gfc_next_ascii_char ();
7880 /* This is the successful exit condition for the loop. */
7881 if (gfc_next_ascii_char () == ':')
7891 if (gfc_match_eos () == MATCH_YES)
7896 m = gfc_match_name (name);
7900 if (find_special (name, &sym, true))
7903 sym->attr.ext_attr |= attr.ext_attr;
7905 if (gfc_match_eos () == MATCH_YES)
7908 if (gfc_match_char (',') != MATCH_YES)
7915 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");