1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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));
1029 /* Function called by variable_decl() that adds a name to the symbol table. */
1032 build_sym (const char *name, gfc_charlen *cl,
1033 gfc_array_spec **as, locus *var_locus)
1035 symbol_attribute attr;
1038 if (gfc_get_symbol (name, NULL, &sym))
1041 /* Start updating the symbol table. Add basic type attribute if present. */
1042 if (current_ts.type != BT_UNKNOWN
1043 && (sym->attr.implicit_type == 0
1044 || !gfc_compare_types (&sym->ts, ¤t_ts))
1045 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1048 if (sym->ts.type == BT_CHARACTER)
1051 /* Add dimension attribute if present. */
1052 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1056 /* Add attribute to symbol. The copy is so that we can reset the
1057 dimension attribute. */
1058 attr = current_attr;
1061 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1064 /* Finish any work that may need to be done for the binding label,
1065 if it's a bind(c). The bind(c) attr is found before the symbol
1066 is made, and before the symbol name (for data decls), so the
1067 current_ts is holding the binding label, or nothing if the
1068 name= attr wasn't given. Therefore, test here if we're dealing
1069 with a bind(c) and make sure the binding label is set correctly. */
1070 if (sym->attr.is_bind_c == 1)
1072 if (sym->binding_label[0] == '\0')
1074 /* Set the binding label and verify that if a NAME= was specified
1075 then only one identifier was in the entity-decl-list. */
1076 if (set_binding_label (sym->binding_label, sym->name,
1077 num_idents_on_line) == FAILURE)
1082 /* See if we know we're in a common block, and if it's a bind(c)
1083 common then we need to make sure we're an interoperable type. */
1084 if (sym->attr.in_common == 1)
1086 /* Test the common block object. */
1087 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1088 && sym->ts.is_c_interop != 1)
1090 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1091 "must be declared with a C interoperable "
1092 "kind since common block '%s' is BIND(C)",
1093 sym->name, sym->common_block->name,
1094 sym->common_block->name);
1099 sym->attr.implied_index = 0;
1101 if (sym->ts.type == BT_CLASS)
1103 sym->attr.class_ok = (sym->attr.dummy
1104 || sym->attr.pointer
1105 || sym->attr.allocatable) ? 1 : 0;
1106 gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as);
1113 /* Set character constant to the given length. The constant will be padded or
1114 truncated. If we're inside an array constructor without a typespec, we
1115 additionally check that all elements have the same length; check_len -1
1116 means no checking. */
1119 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1124 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1125 gcc_assert (expr->ts.type == BT_CHARACTER);
1127 slen = expr->value.character.length;
1130 s = gfc_get_wide_string (len + 1);
1131 memcpy (s, expr->value.character.string,
1132 MIN (len, slen) * sizeof (gfc_char_t));
1134 gfc_wide_memset (&s[slen], ' ', len - slen);
1136 if (gfc_option.warn_character_truncation && slen > len)
1137 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1138 "(%d/%d)", &expr->where, slen, len);
1140 /* Apply the standard by 'hand' otherwise it gets cleared for
1142 if (check_len != -1 && slen != check_len
1143 && !(gfc_option.allow_std & GFC_STD_GNU))
1144 gfc_error_now ("The CHARACTER elements of the array constructor "
1145 "at %L must have the same length (%d/%d)",
1146 &expr->where, slen, check_len);
1149 gfc_free (expr->value.character.string);
1150 expr->value.character.string = s;
1151 expr->value.character.length = len;
1156 /* Function to create and update the enumerator history
1157 using the information passed as arguments.
1158 Pointer "max_enum" is also updated, to point to
1159 enum history node containing largest initializer.
1161 SYM points to the symbol node of enumerator.
1162 INIT points to its enumerator value. */
1165 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1167 enumerator_history *new_enum_history;
1168 gcc_assert (sym != NULL && init != NULL);
1170 new_enum_history = XCNEW (enumerator_history);
1172 new_enum_history->sym = sym;
1173 new_enum_history->initializer = init;
1174 new_enum_history->next = NULL;
1176 if (enum_history == NULL)
1178 enum_history = new_enum_history;
1179 max_enum = enum_history;
1183 new_enum_history->next = enum_history;
1184 enum_history = new_enum_history;
1186 if (mpz_cmp (max_enum->initializer->value.integer,
1187 new_enum_history->initializer->value.integer) < 0)
1188 max_enum = new_enum_history;
1193 /* Function to free enum kind history. */
1196 gfc_free_enum_history (void)
1198 enumerator_history *current = enum_history;
1199 enumerator_history *next;
1201 while (current != NULL)
1203 next = current->next;
1208 enum_history = NULL;
1212 /* Function called by variable_decl() that adds an initialization
1213 expression to a symbol. */
1216 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1218 symbol_attribute attr;
1223 if (find_special (name, &sym, false))
1228 /* If this symbol is confirming an implicit parameter type,
1229 then an initialization expression is not allowed. */
1230 if (attr.flavor == FL_PARAMETER
1231 && sym->value != NULL
1234 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1241 /* An initializer is required for PARAMETER declarations. */
1242 if (attr.flavor == FL_PARAMETER)
1244 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1250 /* If a variable appears in a DATA block, it cannot have an
1254 gfc_error ("Variable '%s' at %C with an initializer already "
1255 "appears in a DATA statement", sym->name);
1259 /* Check if the assignment can happen. This has to be put off
1260 until later for a derived type variable. */
1261 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1262 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1263 && gfc_check_assign_symbol (sym, init) == FAILURE)
1266 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1267 && init->ts.type == BT_CHARACTER)
1269 /* Update symbol character length according initializer. */
1270 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1273 if (sym->ts.u.cl->length == NULL)
1276 /* If there are multiple CHARACTER variables declared on the
1277 same line, we don't want them to share the same length. */
1278 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1280 if (sym->attr.flavor == FL_PARAMETER)
1282 if (init->expr_type == EXPR_CONSTANT)
1284 clen = init->value.character.length;
1285 sym->ts.u.cl->length = gfc_int_expr (clen);
1287 else if (init->expr_type == EXPR_ARRAY)
1289 gfc_expr *p = init->value.constructor->expr;
1290 clen = p->value.character.length;
1291 sym->ts.u.cl->length = gfc_int_expr (clen);
1293 else if (init->ts.u.cl && init->ts.u.cl->length)
1294 sym->ts.u.cl->length =
1295 gfc_copy_expr (sym->value->ts.u.cl->length);
1298 /* Update initializer character length according symbol. */
1299 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1301 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1302 gfc_constructor * p;
1304 if (init->expr_type == EXPR_CONSTANT)
1305 gfc_set_constant_character_len (len, init, -1);
1306 else if (init->expr_type == EXPR_ARRAY)
1308 /* Build a new charlen to prevent simplification from
1309 deleting the length before it is resolved. */
1310 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1311 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1313 for (p = init->value.constructor; p; p = p->next)
1314 gfc_set_constant_character_len (len, p->expr, -1);
1319 /* Need to check if the expression we initialized this
1320 to was one of the iso_c_binding named constants. If so,
1321 and we're a parameter (constant), let it be iso_c.
1323 integer(c_int), parameter :: my_int = c_int
1324 integer(my_int) :: my_int_2
1325 If we mark my_int as iso_c (since we can see it's value
1326 is equal to one of the named constants), then my_int_2
1327 will be considered C interoperable. */
1328 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1330 sym->ts.is_iso_c |= init->ts.is_iso_c;
1331 sym->ts.is_c_interop |= init->ts.is_c_interop;
1332 /* attr bits needed for module files. */
1333 sym->attr.is_iso_c |= init->ts.is_iso_c;
1334 sym->attr.is_c_interop |= init->ts.is_c_interop;
1335 if (init->ts.is_iso_c)
1336 sym->ts.f90_type = init->ts.f90_type;
1339 /* Add initializer. Make sure we keep the ranks sane. */
1340 if (sym->attr.dimension && init->rank == 0)
1346 if (sym->attr.flavor == FL_PARAMETER
1347 && init->expr_type == EXPR_CONSTANT
1348 && spec_size (sym->as, &size) == SUCCESS
1349 && mpz_cmp_si (size, 0) > 0)
1351 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1354 array->value.constructor = c = NULL;
1355 for (n = 0; n < (int)mpz_get_si (size); n++)
1357 if (array->value.constructor == NULL)
1359 array->value.constructor = c = gfc_get_constructor ();
1364 c->next = gfc_get_constructor ();
1366 c->expr = gfc_copy_expr (init);
1370 array->shape = gfc_get_shape (sym->as->rank);
1371 for (n = 0; n < sym->as->rank; n++)
1372 spec_dimen_size (sym->as, n, &array->shape[n]);
1377 init->rank = sym->as->rank;
1381 if (sym->attr.save == SAVE_NONE)
1382 sym->attr.save = SAVE_IMPLICIT;
1390 /* Function called by variable_decl() that adds a name to a structure
1394 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1395 gfc_array_spec **as)
1398 gfc_try t = SUCCESS;
1400 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1401 constructing, it must have the pointer attribute. */
1402 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1403 && current_ts.u.derived == gfc_current_block ()
1404 && current_attr.pointer == 0)
1406 gfc_error ("Component at %C must have the POINTER attribute");
1410 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1412 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1414 gfc_error ("Array component of structure at %C must have explicit "
1415 "or deferred shape");
1420 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1424 if (c->ts.type == BT_CHARACTER)
1426 c->attr = current_attr;
1428 c->initializer = *init;
1433 c->attr.dimension = 1;
1436 /* Should this ever get more complicated, combine with similar section
1437 in add_init_expr_to_sym into a separate function. */
1438 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1439 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1443 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1444 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1445 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1447 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1449 if (c->initializer->expr_type == EXPR_CONSTANT)
1450 gfc_set_constant_character_len (len, c->initializer, -1);
1451 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1452 c->initializer->ts.u.cl->length->value.integer))
1455 gfc_constructor *ctor = c->initializer->value.constructor;
1457 has_ts = (c->initializer->ts.u.cl
1458 && c->initializer->ts.u.cl->length_from_typespec);
1464 /* Remember the length of the first element for checking
1465 that all elements *in the constructor* have the same
1466 length. This need not be the length of the LHS! */
1467 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1468 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1469 first_len = ctor->expr->value.character.length;
1471 for (; ctor; ctor = ctor->next)
1473 if (ctor->expr->expr_type == EXPR_CONSTANT)
1474 gfc_set_constant_character_len (len, ctor->expr,
1475 has_ts ? -1 : first_len);
1481 /* Check array components. */
1482 if (!c->attr.dimension)
1485 if (c->attr.pointer)
1487 if (c->as->type != AS_DEFERRED)
1489 gfc_error ("Pointer array component of structure at %C must have a "
1494 else if (c->attr.allocatable)
1496 if (c->as->type != AS_DEFERRED)
1498 gfc_error ("Allocatable component of structure at %C must have a "
1505 if (c->as->type != AS_EXPLICIT)
1507 gfc_error ("Array component of structure at %C must have an "
1514 if (c->ts.type == BT_CLASS)
1515 gfc_build_class_symbol (&c->ts, &c->attr, &c->as);
1521 /* Match a 'NULL()', and possibly take care of some side effects. */
1524 gfc_match_null (gfc_expr **result)
1530 m = gfc_match (" null ( )");
1534 /* The NULL symbol now has to be/become an intrinsic function. */
1535 if (gfc_get_symbol ("null", NULL, &sym))
1537 gfc_error ("NULL() initialization at %C is ambiguous");
1541 gfc_intrinsic_symbol (sym);
1543 if (sym->attr.proc != PROC_INTRINSIC
1544 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1545 sym->name, NULL) == FAILURE
1546 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1549 e = gfc_get_expr ();
1550 e->where = gfc_current_locus;
1551 e->expr_type = EXPR_NULL;
1552 e->ts.type = BT_UNKNOWN;
1560 /* Match a variable name with an optional initializer. When this
1561 subroutine is called, a variable is expected to be parsed next.
1562 Depending on what is happening at the moment, updates either the
1563 symbol table or the current interface. */
1566 variable_decl (int elem)
1568 char name[GFC_MAX_SYMBOL_LEN + 1];
1569 gfc_expr *initializer, *char_len;
1571 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1582 /* When we get here, we've just matched a list of attributes and
1583 maybe a type and a double colon. The next thing we expect to see
1584 is the name of the symbol. */
1585 m = gfc_match_name (name);
1589 var_locus = gfc_current_locus;
1591 /* Now we could see the optional array spec. or character length. */
1592 m = gfc_match_array_spec (&as);
1593 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1594 cp_as = gfc_copy_array_spec (as);
1595 else if (m == MATCH_ERROR)
1599 as = gfc_copy_array_spec (current_as);
1604 if (current_ts.type == BT_CHARACTER)
1606 switch (match_char_length (&char_len))
1609 cl = gfc_new_charlen (gfc_current_ns, NULL);
1611 cl->length = char_len;
1614 /* Non-constant lengths need to be copied after the first
1615 element. Also copy assumed lengths. */
1618 && (current_ts.u.cl->length == NULL
1619 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1621 cl = gfc_new_charlen (gfc_current_ns, NULL);
1622 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1625 cl = current_ts.u.cl;
1634 /* If this symbol has already shown up in a Cray Pointer declaration,
1635 then we want to set the type & bail out. */
1636 if (gfc_option.flag_cray_pointer)
1638 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1639 if (sym != NULL && sym->attr.cray_pointee)
1641 sym->ts.type = current_ts.type;
1642 sym->ts.kind = current_ts.kind;
1644 sym->ts.u.derived = current_ts.u.derived;
1645 sym->ts.is_c_interop = current_ts.is_c_interop;
1646 sym->ts.is_iso_c = current_ts.is_iso_c;
1649 /* Check to see if we have an array specification. */
1652 if (sym->as != NULL)
1654 gfc_error ("Duplicate array spec for Cray pointee at %C");
1655 gfc_free_array_spec (cp_as);
1661 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1662 gfc_internal_error ("Couldn't set pointee array spec.");
1664 /* Fix the array spec. */
1665 m = gfc_mod_pointee_as (sym->as);
1666 if (m == MATCH_ERROR)
1674 gfc_free_array_spec (cp_as);
1678 /* Procedure pointer as function result. */
1679 if (gfc_current_state () == COMP_FUNCTION
1680 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1681 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1682 strcpy (name, "ppr@");
1684 if (gfc_current_state () == COMP_FUNCTION
1685 && strcmp (name, gfc_current_block ()->name) == 0
1686 && gfc_current_block ()->result
1687 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1688 strcpy (name, "ppr@");
1690 /* OK, we've successfully matched the declaration. Now put the
1691 symbol in the current namespace, because it might be used in the
1692 optional initialization expression for this symbol, e.g. this is
1695 integer, parameter :: i = huge(i)
1697 This is only true for parameters or variables of a basic type.
1698 For components of derived types, it is not true, so we don't
1699 create a symbol for those yet. If we fail to create the symbol,
1701 if (gfc_current_state () != COMP_DERIVED
1702 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1708 /* An interface body specifies all of the procedure's
1709 characteristics and these shall be consistent with those
1710 specified in the procedure definition, except that the interface
1711 may specify a procedure that is not pure if the procedure is
1712 defined to be pure(12.3.2). */
1713 if (current_ts.type == BT_DERIVED
1714 && gfc_current_ns->proc_name
1715 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1716 && current_ts.u.derived->ns != gfc_current_ns)
1719 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1720 if (!(current_ts.u.derived->attr.imported
1722 && st->n.sym == current_ts.u.derived)
1723 && !gfc_current_ns->has_import_set)
1725 gfc_error ("the type of '%s' at %C has not been declared within the "
1732 /* In functions that have a RESULT variable defined, the function
1733 name always refers to function calls. Therefore, the name is
1734 not allowed to appear in specification statements. */
1735 if (gfc_current_state () == COMP_FUNCTION
1736 && gfc_current_block () != NULL
1737 && gfc_current_block ()->result != NULL
1738 && gfc_current_block ()->result != gfc_current_block ()
1739 && strcmp (gfc_current_block ()->name, name) == 0)
1741 gfc_error ("Function name '%s' not allowed at %C", name);
1746 /* We allow old-style initializations of the form
1747 integer i /2/, j(4) /3*3, 1/
1748 (if no colon has been seen). These are different from data
1749 statements in that initializers are only allowed to apply to the
1750 variable immediately preceding, i.e.
1752 is not allowed. Therefore we have to do some work manually, that
1753 could otherwise be left to the matchers for DATA statements. */
1755 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1757 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1758 "initialization at %C") == FAILURE)
1761 return match_old_style_init (name);
1764 /* The double colon must be present in order to have initializers.
1765 Otherwise the statement is ambiguous with an assignment statement. */
1768 if (gfc_match (" =>") == MATCH_YES)
1770 if (!current_attr.pointer)
1772 gfc_error ("Initialization at %C isn't for a pointer variable");
1777 m = gfc_match_null (&initializer);
1780 gfc_error ("Pointer initialization requires a NULL() at %C");
1784 if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED)
1786 gfc_error ("Initialization of pointer at %C is not allowed in "
1787 "a PURE procedure");
1795 else if (gfc_match_char ('=') == MATCH_YES)
1797 if (current_attr.pointer)
1799 gfc_error ("Pointer initialization at %C requires '=>', "
1805 m = gfc_match_init_expr (&initializer);
1808 gfc_error ("Expected an initialization expression at %C");
1812 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)
1813 && gfc_state_stack->state != COMP_DERIVED)
1815 gfc_error ("Initialization of variable at %C is not allowed in "
1816 "a PURE procedure");
1825 if (initializer != NULL && current_attr.allocatable
1826 && gfc_current_state () == COMP_DERIVED)
1828 gfc_error ("Initialization of allocatable component at %C is not "
1834 /* Add the initializer. Note that it is fine if initializer is
1835 NULL here, because we sometimes also need to check if a
1836 declaration *must* have an initialization expression. */
1837 if (gfc_current_state () != COMP_DERIVED)
1838 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1841 if (current_ts.type == BT_DERIVED
1842 && !current_attr.pointer && !initializer)
1843 initializer = gfc_default_initializer (¤t_ts);
1844 t = build_struct (name, cl, &initializer, &as);
1847 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1850 /* Free stuff up and return. */
1851 gfc_free_expr (initializer);
1852 gfc_free_array_spec (as);
1858 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1859 This assumes that the byte size is equal to the kind number for
1860 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1863 gfc_match_old_kind_spec (gfc_typespec *ts)
1868 if (gfc_match_char ('*') != MATCH_YES)
1871 m = gfc_match_small_literal_int (&ts->kind, NULL);
1875 original_kind = ts->kind;
1877 /* Massage the kind numbers for complex types. */
1878 if (ts->type == BT_COMPLEX)
1882 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1883 gfc_basic_typename (ts->type), original_kind);
1889 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1891 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1892 gfc_basic_typename (ts->type), original_kind);
1896 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1897 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1904 /* Match a kind specification. Since kinds are generally optional, we
1905 usually return MATCH_NO if something goes wrong. If a "kind="
1906 string is found, then we know we have an error. */
1909 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1921 where = loc = gfc_current_locus;
1926 if (gfc_match_char ('(') == MATCH_NO)
1929 /* Also gobbles optional text. */
1930 if (gfc_match (" kind = ") == MATCH_YES)
1933 loc = gfc_current_locus;
1936 n = gfc_match_init_expr (&e);
1940 if (gfc_matching_function)
1942 /* The function kind expression might include use associated or
1943 imported parameters and try again after the specification
1945 if (gfc_match_char (')') != MATCH_YES)
1947 gfc_error ("Missing right parenthesis at %C");
1953 gfc_undo_symbols ();
1958 /* ....or else, the match is real. */
1960 gfc_error ("Expected initialization expression at %C");
1968 gfc_error ("Expected scalar initialization expression at %C");
1973 msg = gfc_extract_int (e, &ts->kind);
1982 /* Before throwing away the expression, let's see if we had a
1983 C interoperable kind (and store the fact). */
1984 if (e->ts.is_c_interop == 1)
1986 /* Mark this as c interoperable if being declared with one
1987 of the named constants from iso_c_binding. */
1988 ts->is_c_interop = e->ts.is_iso_c;
1989 ts->f90_type = e->ts.f90_type;
1995 /* Ignore errors to this point, if we've gotten here. This means
1996 we ignore the m=MATCH_ERROR from above. */
1997 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1999 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2000 gfc_basic_typename (ts->type));
2001 gfc_current_locus = where;
2005 /* Warn if, e.g., c_int is used for a REAL variable, but not
2006 if, e.g., c_double is used for COMPLEX as the standard
2007 explicitly says that the kind type parameter for complex and real
2008 variable is the same, i.e. c_float == c_float_complex. */
2009 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2010 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2011 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2012 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2013 "is %s", gfc_basic_typename (ts->f90_type), &where,
2014 gfc_basic_typename (ts->type));
2016 gfc_gobble_whitespace ();
2017 if ((c = gfc_next_ascii_char ()) != ')'
2018 && (ts->type != BT_CHARACTER || c != ','))
2020 if (ts->type == BT_CHARACTER)
2021 gfc_error ("Missing right parenthesis or comma at %C");
2023 gfc_error ("Missing right parenthesis at %C");
2027 /* All tests passed. */
2030 if(m == MATCH_ERROR)
2031 gfc_current_locus = where;
2033 /* Return what we know from the test(s). */
2038 gfc_current_locus = where;
2044 match_char_kind (int * kind, int * is_iso_c)
2053 where = gfc_current_locus;
2055 n = gfc_match_init_expr (&e);
2057 if (n != MATCH_YES && gfc_matching_function)
2059 /* The expression might include use-associated or imported
2060 parameters and try again after the specification
2063 gfc_undo_symbols ();
2068 gfc_error ("Expected initialization expression at %C");
2074 gfc_error ("Expected scalar initialization expression at %C");
2079 msg = gfc_extract_int (e, kind);
2080 *is_iso_c = e->ts.is_iso_c;
2090 /* Ignore errors to this point, if we've gotten here. This means
2091 we ignore the m=MATCH_ERROR from above. */
2092 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2094 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2098 /* All tests passed. */
2101 if (m == MATCH_ERROR)
2102 gfc_current_locus = where;
2104 /* Return what we know from the test(s). */
2109 gfc_current_locus = where;
2114 /* Match the various kind/length specifications in a CHARACTER
2115 declaration. We don't return MATCH_NO. */
2118 gfc_match_char_spec (gfc_typespec *ts)
2120 int kind, seen_length, is_iso_c;
2130 /* Try the old-style specification first. */
2131 old_char_selector = 0;
2133 m = match_char_length (&len);
2137 old_char_selector = 1;
2142 m = gfc_match_char ('(');
2145 m = MATCH_YES; /* Character without length is a single char. */
2149 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2150 if (gfc_match (" kind =") == MATCH_YES)
2152 m = match_char_kind (&kind, &is_iso_c);
2154 if (m == MATCH_ERROR)
2159 if (gfc_match (" , len =") == MATCH_NO)
2162 m = char_len_param_value (&len);
2165 if (m == MATCH_ERROR)
2172 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2173 if (gfc_match (" len =") == MATCH_YES)
2175 m = char_len_param_value (&len);
2178 if (m == MATCH_ERROR)
2182 if (gfc_match_char (')') == MATCH_YES)
2185 if (gfc_match (" , kind =") != MATCH_YES)
2188 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2194 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2195 m = char_len_param_value (&len);
2198 if (m == MATCH_ERROR)
2202 m = gfc_match_char (')');
2206 if (gfc_match_char (',') != MATCH_YES)
2209 gfc_match (" kind ="); /* Gobble optional text. */
2211 m = match_char_kind (&kind, &is_iso_c);
2212 if (m == MATCH_ERROR)
2218 /* Require a right-paren at this point. */
2219 m = gfc_match_char (')');
2224 gfc_error ("Syntax error in CHARACTER declaration at %C");
2226 gfc_free_expr (len);
2230 /* Deal with character functions after USE and IMPORT statements. */
2231 if (gfc_matching_function)
2233 gfc_free_expr (len);
2234 gfc_undo_symbols ();
2240 gfc_free_expr (len);
2244 /* Do some final massaging of the length values. */
2245 cl = gfc_new_charlen (gfc_current_ns, NULL);
2247 if (seen_length == 0)
2248 cl->length = gfc_int_expr (1);
2253 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2255 /* We have to know if it was a c interoperable kind so we can
2256 do accurate type checking of bind(c) procs, etc. */
2258 /* Mark this as c interoperable if being declared with one
2259 of the named constants from iso_c_binding. */
2260 ts->is_c_interop = is_iso_c;
2261 else if (len != NULL)
2262 /* Here, we might have parsed something such as: character(c_char)
2263 In this case, the parsing code above grabs the c_char when
2264 looking for the length (line 1690, roughly). it's the last
2265 testcase for parsing the kind params of a character variable.
2266 However, it's not actually the length. this seems like it
2268 To see if the user used a C interop kind, test the expr
2269 of the so called length, and see if it's C interoperable. */
2270 ts->is_c_interop = len->ts.is_iso_c;
2276 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2277 structure to the matched specification. This is necessary for FUNCTION and
2278 IMPLICIT statements.
2280 If implicit_flag is nonzero, then we don't check for the optional
2281 kind specification. Not doing so is needed for matching an IMPLICIT
2282 statement correctly. */
2285 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2287 char name[GFC_MAX_SYMBOL_LEN + 1];
2291 bool seen_deferred_kind;
2293 /* A belt and braces check that the typespec is correctly being treated
2294 as a deferred characteristic association. */
2295 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2296 && (gfc_current_block ()->result->ts.kind == -1)
2297 && (ts->kind == -1);
2299 if (seen_deferred_kind)
2302 /* Clear the current binding label, in case one is given. */
2303 curr_binding_label[0] = '\0';
2305 if (gfc_match (" byte") == MATCH_YES)
2307 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2311 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2313 gfc_error ("BYTE type used at %C "
2314 "is not available on the target machine");
2318 ts->type = BT_INTEGER;
2323 if (gfc_match (" integer") == MATCH_YES)
2325 ts->type = BT_INTEGER;
2326 ts->kind = gfc_default_integer_kind;
2330 if (gfc_match (" character") == MATCH_YES)
2332 ts->type = BT_CHARACTER;
2333 if (implicit_flag == 0)
2334 return gfc_match_char_spec (ts);
2339 if (gfc_match (" real") == MATCH_YES)
2342 ts->kind = gfc_default_real_kind;
2346 if (gfc_match (" double precision") == MATCH_YES)
2349 ts->kind = gfc_default_double_kind;
2353 if (gfc_match (" complex") == MATCH_YES)
2355 ts->type = BT_COMPLEX;
2356 ts->kind = gfc_default_complex_kind;
2360 if (gfc_match (" double complex") == MATCH_YES)
2362 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2363 "conform to the Fortran 95 standard") == FAILURE)
2366 ts->type = BT_COMPLEX;
2367 ts->kind = gfc_default_double_kind;
2371 if (gfc_match (" logical") == MATCH_YES)
2373 ts->type = BT_LOGICAL;
2374 ts->kind = gfc_default_logical_kind;
2378 m = gfc_match (" type ( %n )", name);
2380 ts->type = BT_DERIVED;
2383 m = gfc_match (" class ( %n )", name);
2386 ts->type = BT_CLASS;
2388 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2393 /* Defer association of the derived type until the end of the
2394 specification block. However, if the derived type can be
2395 found, add it to the typespec. */
2396 if (gfc_matching_function)
2398 ts->u.derived = NULL;
2399 if (gfc_current_state () != COMP_INTERFACE
2400 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2401 ts->u.derived = sym;
2405 /* Search for the name but allow the components to be defined later. If
2406 type = -1, this typespec has been seen in a function declaration but
2407 the type could not be accessed at that point. */
2409 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2411 gfc_error ("Type name '%s' at %C is ambiguous", name);
2414 else if (ts->kind == -1)
2416 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2417 || gfc_current_ns->has_import_set;
2418 if (gfc_find_symbol (name, NULL, iface, &sym))
2420 gfc_error ("Type name '%s' at %C is ambiguous", name);
2429 if (sym->attr.flavor != FL_DERIVED
2430 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2433 gfc_set_sym_referenced (sym);
2434 ts->u.derived = sym;
2439 /* For all types except double, derived and character, look for an
2440 optional kind specifier. MATCH_NO is actually OK at this point. */
2441 if (implicit_flag == 1)
2444 if (gfc_current_form == FORM_FREE)
2446 c = gfc_peek_ascii_char ();
2447 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2448 && c != ':' && c != ',')
2452 m = gfc_match_kind_spec (ts, false);
2453 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2454 m = gfc_match_old_kind_spec (ts);
2456 /* Defer association of the KIND expression of function results
2457 until after USE and IMPORT statements. */
2458 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2459 || gfc_matching_function)
2463 m = MATCH_YES; /* No kind specifier found. */
2469 /* Match an IMPLICIT NONE statement. Actually, this statement is
2470 already matched in parse.c, or we would not end up here in the
2471 first place. So the only thing we need to check, is if there is
2472 trailing garbage. If not, the match is successful. */
2475 gfc_match_implicit_none (void)
2477 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2481 /* Match the letter range(s) of an IMPLICIT statement. */
2484 match_implicit_range (void)
2490 cur_loc = gfc_current_locus;
2492 gfc_gobble_whitespace ();
2493 c = gfc_next_ascii_char ();
2496 gfc_error ("Missing character range in IMPLICIT at %C");
2503 gfc_gobble_whitespace ();
2504 c1 = gfc_next_ascii_char ();
2508 gfc_gobble_whitespace ();
2509 c = gfc_next_ascii_char ();
2514 inner = 0; /* Fall through. */
2521 gfc_gobble_whitespace ();
2522 c2 = gfc_next_ascii_char ();
2526 gfc_gobble_whitespace ();
2527 c = gfc_next_ascii_char ();
2529 if ((c != ',') && (c != ')'))
2542 gfc_error ("Letters must be in alphabetic order in "
2543 "IMPLICIT statement at %C");
2547 /* See if we can add the newly matched range to the pending
2548 implicits from this IMPLICIT statement. We do not check for
2549 conflicts with whatever earlier IMPLICIT statements may have
2550 set. This is done when we've successfully finished matching
2552 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2559 gfc_syntax_error (ST_IMPLICIT);
2561 gfc_current_locus = cur_loc;
2566 /* Match an IMPLICIT statement, storing the types for
2567 gfc_set_implicit() if the statement is accepted by the parser.
2568 There is a strange looking, but legal syntactic construction
2569 possible. It looks like:
2571 IMPLICIT INTEGER (a-b) (c-d)
2573 This is legal if "a-b" is a constant expression that happens to
2574 equal one of the legal kinds for integers. The real problem
2575 happens with an implicit specification that looks like:
2577 IMPLICIT INTEGER (a-b)
2579 In this case, a typespec matcher that is "greedy" (as most of the
2580 matchers are) gobbles the character range as a kindspec, leaving
2581 nothing left. We therefore have to go a bit more slowly in the
2582 matching process by inhibiting the kindspec checking during
2583 typespec matching and checking for a kind later. */
2586 gfc_match_implicit (void)
2595 /* We don't allow empty implicit statements. */
2596 if (gfc_match_eos () == MATCH_YES)
2598 gfc_error ("Empty IMPLICIT statement at %C");
2604 /* First cleanup. */
2605 gfc_clear_new_implicit ();
2607 /* A basic type is mandatory here. */
2608 m = gfc_match_decl_type_spec (&ts, 1);
2609 if (m == MATCH_ERROR)
2614 cur_loc = gfc_current_locus;
2615 m = match_implicit_range ();
2619 /* We may have <TYPE> (<RANGE>). */
2620 gfc_gobble_whitespace ();
2621 c = gfc_next_ascii_char ();
2622 if ((c == '\n') || (c == ','))
2624 /* Check for CHARACTER with no length parameter. */
2625 if (ts.type == BT_CHARACTER && !ts.u.cl)
2627 ts.kind = gfc_default_character_kind;
2628 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2629 ts.u.cl->length = gfc_int_expr (1);
2632 /* Record the Successful match. */
2633 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2638 gfc_current_locus = cur_loc;
2641 /* Discard the (incorrectly) matched range. */
2642 gfc_clear_new_implicit ();
2644 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2645 if (ts.type == BT_CHARACTER)
2646 m = gfc_match_char_spec (&ts);
2649 m = gfc_match_kind_spec (&ts, false);
2652 m = gfc_match_old_kind_spec (&ts);
2653 if (m == MATCH_ERROR)
2659 if (m == MATCH_ERROR)
2662 m = match_implicit_range ();
2663 if (m == MATCH_ERROR)
2668 gfc_gobble_whitespace ();
2669 c = gfc_next_ascii_char ();
2670 if ((c != '\n') && (c != ','))
2673 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2681 gfc_syntax_error (ST_IMPLICIT);
2689 gfc_match_import (void)
2691 char name[GFC_MAX_SYMBOL_LEN + 1];
2696 if (gfc_current_ns->proc_name == NULL
2697 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2699 gfc_error ("IMPORT statement at %C only permitted in "
2700 "an INTERFACE body");
2704 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2708 if (gfc_match_eos () == MATCH_YES)
2710 /* All host variables should be imported. */
2711 gfc_current_ns->has_import_set = 1;
2715 if (gfc_match (" ::") == MATCH_YES)
2717 if (gfc_match_eos () == MATCH_YES)
2719 gfc_error ("Expecting list of named entities at %C");
2726 m = gfc_match (" %n", name);
2730 if (gfc_current_ns->parent != NULL
2731 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2733 gfc_error ("Type name '%s' at %C is ambiguous", name);
2736 else if (gfc_current_ns->proc_name->ns->parent != NULL
2737 && gfc_find_symbol (name,
2738 gfc_current_ns->proc_name->ns->parent,
2741 gfc_error ("Type name '%s' at %C is ambiguous", name);
2747 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2748 "at %C - does not exist.", name);
2752 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2754 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2759 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2762 sym->attr.imported = 1;
2774 if (gfc_match_eos () == MATCH_YES)
2776 if (gfc_match_char (',') != MATCH_YES)
2783 gfc_error ("Syntax error in IMPORT statement at %C");
2788 /* A minimal implementation of gfc_match without whitespace, escape
2789 characters or variable arguments. Returns true if the next
2790 characters match the TARGET template exactly. */
2793 match_string_p (const char *target)
2797 for (p = target; *p; p++)
2798 if ((char) gfc_next_ascii_char () != *p)
2803 /* Matches an attribute specification including array specs. If
2804 successful, leaves the variables current_attr and current_as
2805 holding the specification. Also sets the colon_seen variable for
2806 later use by matchers associated with initializations.
2808 This subroutine is a little tricky in the sense that we don't know
2809 if we really have an attr-spec until we hit the double colon.
2810 Until that time, we can only return MATCH_NO. This forces us to
2811 check for duplicate specification at this level. */
2814 match_attr_spec (void)
2816 /* Modifiers that can exist in a type statement. */
2818 { GFC_DECL_BEGIN = 0,
2819 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2820 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2821 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2822 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2823 DECL_IS_BIND_C, DECL_ASYNCHRONOUS, DECL_NONE,
2824 GFC_DECL_END /* Sentinel */
2828 /* GFC_DECL_END is the sentinel, index starts at 0. */
2829 #define NUM_DECL GFC_DECL_END
2831 locus start, seen_at[NUM_DECL];
2838 gfc_clear_attr (¤t_attr);
2839 start = gfc_current_locus;
2844 /* See if we get all of the keywords up to the final double colon. */
2845 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2853 gfc_gobble_whitespace ();
2855 ch = gfc_next_ascii_char ();
2858 /* This is the successful exit condition for the loop. */
2859 if (gfc_next_ascii_char () == ':')
2864 gfc_gobble_whitespace ();
2865 switch (gfc_peek_ascii_char ())
2868 gfc_next_ascii_char ();
2869 switch (gfc_next_ascii_char ())
2872 if (match_string_p ("locatable"))
2874 /* Matched "allocatable". */
2875 d = DECL_ALLOCATABLE;
2880 if (match_string_p ("ynchronous"))
2882 /* Matched "asynchronous". */
2883 d = DECL_ASYNCHRONOUS;
2889 /* Try and match the bind(c). */
2890 m = gfc_match_bind_c (NULL, true);
2893 else if (m == MATCH_ERROR)
2898 if (match_string_p ("dimension"))
2903 if (match_string_p ("external"))
2908 if (match_string_p ("int"))
2910 ch = gfc_next_ascii_char ();
2913 if (match_string_p ("nt"))
2915 /* Matched "intent". */
2916 /* TODO: Call match_intent_spec from here. */
2917 if (gfc_match (" ( in out )") == MATCH_YES)
2919 else if (gfc_match (" ( in )") == MATCH_YES)
2921 else if (gfc_match (" ( out )") == MATCH_YES)
2927 if (match_string_p ("insic"))
2929 /* Matched "intrinsic". */
2937 if (match_string_p ("optional"))
2942 gfc_next_ascii_char ();
2943 switch (gfc_next_ascii_char ())
2946 if (match_string_p ("rameter"))
2948 /* Matched "parameter". */
2954 if (match_string_p ("inter"))
2956 /* Matched "pointer". */
2962 ch = gfc_next_ascii_char ();
2965 if (match_string_p ("vate"))
2967 /* Matched "private". */
2973 if (match_string_p ("tected"))
2975 /* Matched "protected". */
2982 if (match_string_p ("blic"))
2984 /* Matched "public". */
2992 if (match_string_p ("save"))
2997 if (match_string_p ("target"))
3002 gfc_next_ascii_char ();
3003 ch = gfc_next_ascii_char ();
3006 if (match_string_p ("lue"))
3008 /* Matched "value". */
3014 if (match_string_p ("latile"))
3016 /* Matched "volatile". */
3024 /* No double colon and no recognizable decl_type, so assume that
3025 we've been looking at something else the whole time. */
3032 /* Check to make sure any parens are paired up correctly. */
3033 if (gfc_match_parens () == MATCH_ERROR)
3040 seen_at[d] = gfc_current_locus;
3042 if (d == DECL_DIMENSION)
3044 m = gfc_match_array_spec (¤t_as);
3048 gfc_error ("Missing dimension specification at %C");
3052 if (m == MATCH_ERROR)
3057 /* Since we've seen a double colon, we have to be looking at an
3058 attr-spec. This means that we can now issue errors. */
3059 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3064 case DECL_ALLOCATABLE:
3065 attr = "ALLOCATABLE";
3067 case DECL_ASYNCHRONOUS:
3068 attr = "ASYNCHRONOUS";
3070 case DECL_DIMENSION:
3077 attr = "INTENT (IN)";
3080 attr = "INTENT (OUT)";
3083 attr = "INTENT (IN OUT)";
3085 case DECL_INTRINSIC:
3091 case DECL_PARAMETER:
3097 case DECL_PROTECTED:
3112 case DECL_IS_BIND_C:
3122 attr = NULL; /* This shouldn't happen. */
3125 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3130 /* Now that we've dealt with duplicate attributes, add the attributes
3131 to the current attribute. */
3132 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3137 if (gfc_current_state () == COMP_DERIVED
3138 && d != DECL_DIMENSION && d != DECL_POINTER
3139 && d != DECL_PRIVATE && d != DECL_PUBLIC
3142 if (d == DECL_ALLOCATABLE)
3144 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3145 "attribute at %C in a TYPE definition")
3154 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3161 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3162 && gfc_current_state () != COMP_MODULE)
3164 if (d == DECL_PRIVATE)
3168 if (gfc_current_state () == COMP_DERIVED
3169 && gfc_state_stack->previous
3170 && gfc_state_stack->previous->state == COMP_MODULE)
3172 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3173 "at %L in a TYPE definition", attr,
3183 gfc_error ("%s attribute at %L is not allowed outside of the "
3184 "specification part of a module", attr, &seen_at[d]);
3192 case DECL_ALLOCATABLE:
3193 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3196 case DECL_ASYNCHRONOUS:
3197 if (gfc_notify_std (GFC_STD_F2003,
3198 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3202 t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]);
3205 case DECL_DIMENSION:
3206 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3210 t = gfc_add_external (¤t_attr, &seen_at[d]);
3214 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3218 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3222 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3225 case DECL_INTRINSIC:
3226 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3230 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3233 case DECL_PARAMETER:
3234 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3238 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3241 case DECL_PROTECTED:
3242 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3244 gfc_error ("PROTECTED at %C only allowed in specification "
3245 "part of a module");
3250 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3255 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3259 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3264 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3269 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3273 t = gfc_add_target (¤t_attr, &seen_at[d]);
3276 case DECL_IS_BIND_C:
3277 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3281 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3286 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3290 if (gfc_notify_std (GFC_STD_F2003,
3291 "Fortran 2003: VOLATILE attribute at %C")
3295 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3299 gfc_internal_error ("match_attr_spec(): Bad attribute");
3313 gfc_current_locus = start;
3314 gfc_free_array_spec (current_as);
3320 /* Set the binding label, dest_label, either with the binding label
3321 stored in the given gfc_typespec, ts, or if none was provided, it
3322 will be the symbol name in all lower case, as required by the draft
3323 (J3/04-007, section 15.4.1). If a binding label was given and
3324 there is more than one argument (num_idents), it is an error. */
3327 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3329 if (num_idents > 1 && has_name_equals)
3331 gfc_error ("Multiple identifiers provided with "
3332 "single NAME= specifier at %C");
3336 if (curr_binding_label[0] != '\0')
3338 /* Binding label given; store in temp holder til have sym. */
3339 strcpy (dest_label, curr_binding_label);
3343 /* No binding label given, and the NAME= specifier did not exist,
3344 which means there was no NAME="". */
3345 if (sym_name != NULL && has_name_equals == 0)
3346 strcpy (dest_label, sym_name);
3353 /* Set the status of the given common block as being BIND(C) or not,
3354 depending on the given parameter, is_bind_c. */
3357 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3359 com_block->is_bind_c = is_bind_c;
3364 /* Verify that the given gfc_typespec is for a C interoperable type. */
3367 verify_c_interop (gfc_typespec *ts)
3369 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3370 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3371 else if (ts->is_c_interop != 1)
3378 /* Verify that the variables of a given common block, which has been
3379 defined with the attribute specifier bind(c), to be of a C
3380 interoperable type. Errors will be reported here, if
3384 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3386 gfc_symbol *curr_sym = NULL;
3387 gfc_try retval = SUCCESS;
3389 curr_sym = com_block->head;
3391 /* Make sure we have at least one symbol. */
3392 if (curr_sym == NULL)
3395 /* Here we know we have a symbol, so we'll execute this loop
3399 /* The second to last param, 1, says this is in a common block. */
3400 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3401 curr_sym = curr_sym->common_next;
3402 } while (curr_sym != NULL);
3408 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3409 an appropriate error message is reported. */
3412 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3413 int is_in_common, gfc_common_head *com_block)
3415 bool bind_c_function = false;
3416 gfc_try retval = SUCCESS;
3418 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3419 bind_c_function = true;
3421 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3423 tmp_sym = tmp_sym->result;
3424 /* Make sure it wasn't an implicitly typed result. */
3425 if (tmp_sym->attr.implicit_type)
3427 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3428 "%L may not be C interoperable", tmp_sym->name,
3429 &tmp_sym->declared_at);
3430 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3431 /* Mark it as C interoperable to prevent duplicate warnings. */
3432 tmp_sym->ts.is_c_interop = 1;
3433 tmp_sym->attr.is_c_interop = 1;
3437 /* Here, we know we have the bind(c) attribute, so if we have
3438 enough type info, then verify that it's a C interop kind.
3439 The info could be in the symbol already, or possibly still in
3440 the given ts (current_ts), so look in both. */
3441 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3443 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3445 /* See if we're dealing with a sym in a common block or not. */
3446 if (is_in_common == 1)
3448 gfc_warning ("Variable '%s' in common block '%s' at %L "
3449 "may not be a C interoperable "
3450 "kind though common block '%s' is BIND(C)",
3451 tmp_sym->name, com_block->name,
3452 &(tmp_sym->declared_at), com_block->name);
3456 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3457 gfc_error ("Type declaration '%s' at %L is not C "
3458 "interoperable but it is BIND(C)",
3459 tmp_sym->name, &(tmp_sym->declared_at));
3461 gfc_warning ("Variable '%s' at %L "
3462 "may not be a C interoperable "
3463 "kind but it is bind(c)",
3464 tmp_sym->name, &(tmp_sym->declared_at));
3468 /* Variables declared w/in a common block can't be bind(c)
3469 since there's no way for C to see these variables, so there's
3470 semantically no reason for the attribute. */
3471 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3473 gfc_error ("Variable '%s' in common block '%s' at "
3474 "%L cannot be declared with BIND(C) "
3475 "since it is not a global",
3476 tmp_sym->name, com_block->name,
3477 &(tmp_sym->declared_at));
3481 /* Scalar variables that are bind(c) can not have the pointer
3482 or allocatable attributes. */
3483 if (tmp_sym->attr.is_bind_c == 1)
3485 if (tmp_sym->attr.pointer == 1)
3487 gfc_error ("Variable '%s' at %L cannot have both the "
3488 "POINTER and BIND(C) attributes",
3489 tmp_sym->name, &(tmp_sym->declared_at));
3493 if (tmp_sym->attr.allocatable == 1)
3495 gfc_error ("Variable '%s' at %L cannot have both the "
3496 "ALLOCATABLE and BIND(C) attributes",
3497 tmp_sym->name, &(tmp_sym->declared_at));
3503 /* If it is a BIND(C) function, make sure the return value is a
3504 scalar value. The previous tests in this function made sure
3505 the type is interoperable. */
3506 if (bind_c_function && tmp_sym->as != NULL)
3507 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3508 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3510 /* BIND(C) functions can not return a character string. */
3511 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3512 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3513 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3514 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3515 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3516 "be a character string", tmp_sym->name,
3517 &(tmp_sym->declared_at));
3520 /* See if the symbol has been marked as private. If it has, make sure
3521 there is no binding label and warn the user if there is one. */
3522 if (tmp_sym->attr.access == ACCESS_PRIVATE
3523 && tmp_sym->binding_label[0] != '\0')
3524 /* Use gfc_warning_now because we won't say that the symbol fails
3525 just because of this. */
3526 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3527 "given the binding label '%s'", tmp_sym->name,
3528 &(tmp_sym->declared_at), tmp_sym->binding_label);
3534 /* Set the appropriate fields for a symbol that's been declared as
3535 BIND(C) (the is_bind_c flag and the binding label), and verify that
3536 the type is C interoperable. Errors are reported by the functions
3537 used to set/test these fields. */
3540 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3542 gfc_try retval = SUCCESS;
3544 /* TODO: Do we need to make sure the vars aren't marked private? */
3546 /* Set the is_bind_c bit in symbol_attribute. */
3547 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3549 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3550 num_idents) != SUCCESS)
3557 /* Set the fields marking the given common block as BIND(C), including
3558 a binding label, and report any errors encountered. */
3561 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3563 gfc_try retval = SUCCESS;
3565 /* destLabel, common name, typespec (which may have binding label). */
3566 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3570 /* Set the given common block (com_block) to being bind(c) (1). */
3571 set_com_block_bind_c (com_block, 1);
3577 /* Retrieve the list of one or more identifiers that the given bind(c)
3578 attribute applies to. */
3581 get_bind_c_idents (void)
3583 char name[GFC_MAX_SYMBOL_LEN + 1];
3585 gfc_symbol *tmp_sym = NULL;
3587 gfc_common_head *com_block = NULL;
3589 if (gfc_match_name (name) == MATCH_YES)
3591 found_id = MATCH_YES;
3592 gfc_get_ha_symbol (name, &tmp_sym);
3594 else if (match_common_name (name) == MATCH_YES)
3596 found_id = MATCH_YES;
3597 com_block = gfc_get_common (name, 0);
3601 gfc_error ("Need either entity or common block name for "
3602 "attribute specification statement at %C");
3606 /* Save the current identifier and look for more. */
3609 /* Increment the number of identifiers found for this spec stmt. */
3612 /* Make sure we have a sym or com block, and verify that it can
3613 be bind(c). Set the appropriate field(s) and look for more
3615 if (tmp_sym != NULL || com_block != NULL)
3617 if (tmp_sym != NULL)
3619 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3625 if (set_verify_bind_c_com_block(com_block, num_idents)
3630 /* Look to see if we have another identifier. */
3632 if (gfc_match_eos () == MATCH_YES)
3633 found_id = MATCH_NO;
3634 else if (gfc_match_char (',') != MATCH_YES)
3635 found_id = MATCH_NO;
3636 else if (gfc_match_name (name) == MATCH_YES)
3638 found_id = MATCH_YES;
3639 gfc_get_ha_symbol (name, &tmp_sym);
3641 else if (match_common_name (name) == MATCH_YES)
3643 found_id = MATCH_YES;
3644 com_block = gfc_get_common (name, 0);
3648 gfc_error ("Missing entity or common block name for "
3649 "attribute specification statement at %C");
3655 gfc_internal_error ("Missing symbol");
3657 } while (found_id == MATCH_YES);
3659 /* if we get here we were successful */
3664 /* Try and match a BIND(C) attribute specification statement. */
3667 gfc_match_bind_c_stmt (void)
3669 match found_match = MATCH_NO;
3674 /* This may not be necessary. */
3676 /* Clear the temporary binding label holder. */
3677 curr_binding_label[0] = '\0';
3679 /* Look for the bind(c). */
3680 found_match = gfc_match_bind_c (NULL, true);
3682 if (found_match == MATCH_YES)
3684 /* Look for the :: now, but it is not required. */
3687 /* Get the identifier(s) that needs to be updated. This may need to
3688 change to hand the flag(s) for the attr specified so all identifiers
3689 found can have all appropriate parts updated (assuming that the same
3690 spec stmt can have multiple attrs, such as both bind(c) and
3692 if (get_bind_c_idents () != SUCCESS)
3693 /* Error message should have printed already. */
3701 /* Match a data declaration statement. */
3704 gfc_match_data_decl (void)
3710 num_idents_on_line = 0;
3712 m = gfc_match_decl_type_spec (¤t_ts, 0);
3716 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3717 && gfc_current_state () != COMP_DERIVED)
3719 sym = gfc_use_derived (current_ts.u.derived);
3727 current_ts.u.derived = sym;
3730 m = match_attr_spec ();
3731 if (m == MATCH_ERROR)
3737 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3738 && current_ts.u.derived->components == NULL
3739 && !current_ts.u.derived->attr.zero_comp)
3742 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3745 gfc_find_symbol (current_ts.u.derived->name,
3746 current_ts.u.derived->ns->parent, 1, &sym);
3748 /* Any symbol that we find had better be a type definition
3749 which has its components defined. */
3750 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3751 && (current_ts.u.derived->components != NULL
3752 || current_ts.u.derived->attr.zero_comp))
3755 /* Now we have an error, which we signal, and then fix up
3756 because the knock-on is plain and simple confusing. */
3757 gfc_error_now ("Derived type at %C has not been previously defined "
3758 "and so cannot appear in a derived type definition");
3759 current_attr.pointer = 1;
3764 /* If we have an old-style character declaration, and no new-style
3765 attribute specifications, then there a comma is optional between
3766 the type specification and the variable list. */
3767 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3768 gfc_match_char (',');
3770 /* Give the types/attributes to symbols that follow. Give the element
3771 a number so that repeat character length expressions can be copied. */
3775 num_idents_on_line++;
3776 m = variable_decl (elem++);
3777 if (m == MATCH_ERROR)
3782 if (gfc_match_eos () == MATCH_YES)
3784 if (gfc_match_char (',') != MATCH_YES)
3788 if (gfc_error_flag_test () == 0)
3789 gfc_error ("Syntax error in data declaration at %C");
3792 gfc_free_data_all (gfc_current_ns);
3795 gfc_free_array_spec (current_as);
3801 /* Match a prefix associated with a function or subroutine
3802 declaration. If the typespec pointer is nonnull, then a typespec
3803 can be matched. Note that if nothing matches, MATCH_YES is
3804 returned (the null string was matched). */
3807 gfc_match_prefix (gfc_typespec *ts)
3811 gfc_clear_attr (¤t_attr);
3814 gcc_assert (!gfc_matching_prefix);
3815 gfc_matching_prefix = true;
3818 if (!seen_type && ts != NULL
3819 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3820 && gfc_match_space () == MATCH_YES)
3827 if (gfc_match ("elemental% ") == MATCH_YES)
3829 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3835 if (gfc_match ("pure% ") == MATCH_YES)
3837 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3843 if (gfc_match ("recursive% ") == MATCH_YES)
3845 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3851 /* At this point, the next item is not a prefix. */
3852 gcc_assert (gfc_matching_prefix);
3853 gfc_matching_prefix = false;
3857 gcc_assert (gfc_matching_prefix);
3858 gfc_matching_prefix = false;
3863 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3866 copy_prefix (symbol_attribute *dest, locus *where)
3868 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3871 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3874 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3881 /* Match a formal argument list. */
3884 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3886 gfc_formal_arglist *head, *tail, *p, *q;
3887 char name[GFC_MAX_SYMBOL_LEN + 1];
3893 if (gfc_match_char ('(') != MATCH_YES)
3900 if (gfc_match_char (')') == MATCH_YES)
3905 if (gfc_match_char ('*') == MATCH_YES)
3909 m = gfc_match_name (name);
3913 if (gfc_get_symbol (name, NULL, &sym))
3917 p = gfc_get_formal_arglist ();
3929 /* We don't add the VARIABLE flavor because the name could be a
3930 dummy procedure. We don't apply these attributes to formal
3931 arguments of statement functions. */
3932 if (sym != NULL && !st_flag
3933 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3934 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3940 /* The name of a program unit can be in a different namespace,
3941 so check for it explicitly. After the statement is accepted,
3942 the name is checked for especially in gfc_get_symbol(). */
3943 if (gfc_new_block != NULL && sym != NULL
3944 && strcmp (sym->name, gfc_new_block->name) == 0)
3946 gfc_error ("Name '%s' at %C is the name of the procedure",
3952 if (gfc_match_char (')') == MATCH_YES)
3955 m = gfc_match_char (',');
3958 gfc_error ("Unexpected junk in formal argument list at %C");
3964 /* Check for duplicate symbols in the formal argument list. */
3967 for (p = head; p->next; p = p->next)
3972 for (q = p->next; q; q = q->next)
3973 if (p->sym == q->sym)
3975 gfc_error ("Duplicate symbol '%s' in formal argument list "
3976 "at %C", p->sym->name);
3984 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3994 gfc_free_formal_arglist (head);
3999 /* Match a RESULT specification following a function declaration or
4000 ENTRY statement. Also matches the end-of-statement. */
4003 match_result (gfc_symbol *function, gfc_symbol **result)
4005 char name[GFC_MAX_SYMBOL_LEN + 1];
4009 if (gfc_match (" result (") != MATCH_YES)
4012 m = gfc_match_name (name);
4016 /* Get the right paren, and that's it because there could be the
4017 bind(c) attribute after the result clause. */
4018 if (gfc_match_char(')') != MATCH_YES)
4020 /* TODO: should report the missing right paren here. */
4024 if (strcmp (function->name, name) == 0)
4026 gfc_error ("RESULT variable at %C must be different than function name");
4030 if (gfc_get_symbol (name, NULL, &r))
4033 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4042 /* Match a function suffix, which could be a combination of a result
4043 clause and BIND(C), either one, or neither. The draft does not
4044 require them to come in a specific order. */
4047 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4049 match is_bind_c; /* Found bind(c). */
4050 match is_result; /* Found result clause. */
4051 match found_match; /* Status of whether we've found a good match. */
4052 char peek_char; /* Character we're going to peek at. */
4053 bool allow_binding_name;
4055 /* Initialize to having found nothing. */
4056 found_match = MATCH_NO;
4057 is_bind_c = MATCH_NO;
4058 is_result = MATCH_NO;
4060 /* Get the next char to narrow between result and bind(c). */
4061 gfc_gobble_whitespace ();
4062 peek_char = gfc_peek_ascii_char ();
4064 /* C binding names are not allowed for internal procedures. */
4065 if (gfc_current_state () == COMP_CONTAINS
4066 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4067 allow_binding_name = false;
4069 allow_binding_name = true;
4074 /* Look for result clause. */
4075 is_result = match_result (sym, result);
4076 if (is_result == MATCH_YES)
4078 /* Now see if there is a bind(c) after it. */
4079 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4080 /* We've found the result clause and possibly bind(c). */
4081 found_match = MATCH_YES;
4084 /* This should only be MATCH_ERROR. */
4085 found_match = is_result;
4088 /* Look for bind(c) first. */
4089 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4090 if (is_bind_c == MATCH_YES)
4092 /* Now see if a result clause followed it. */
4093 is_result = match_result (sym, result);
4094 found_match = MATCH_YES;
4098 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4099 found_match = MATCH_ERROR;
4103 gfc_error ("Unexpected junk after function declaration at %C");
4104 found_match = MATCH_ERROR;
4108 if (is_bind_c == MATCH_YES)
4110 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4111 if (gfc_current_state () == COMP_CONTAINS
4112 && sym->ns->proc_name->attr.flavor != FL_MODULE
4113 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4114 "at %L may not be specified for an internal "
4115 "procedure", &gfc_current_locus)
4119 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4128 /* Procedure pointer return value without RESULT statement:
4129 Add "hidden" result variable named "ppr@". */
4132 add_hidden_procptr_result (gfc_symbol *sym)
4136 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4139 /* First usage case: PROCEDURE and EXTERNAL statements. */
4140 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4141 && strcmp (gfc_current_block ()->name, sym->name) == 0
4142 && sym->attr.external;
4143 /* Second usage case: INTERFACE statements. */
4144 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4145 && gfc_state_stack->previous->state == COMP_FUNCTION
4146 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4152 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4156 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4157 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4158 st2->n.sym = stree->n.sym;
4160 sym->result = stree->n.sym;
4162 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4163 sym->result->attr.pointer = sym->attr.pointer;
4164 sym->result->attr.external = sym->attr.external;
4165 sym->result->attr.referenced = sym->attr.referenced;
4166 sym->result->ts = sym->ts;
4167 sym->attr.proc_pointer = 0;
4168 sym->attr.pointer = 0;
4169 sym->attr.external = 0;
4170 if (sym->result->attr.external && sym->result->attr.pointer)
4172 sym->result->attr.pointer = 0;
4173 sym->result->attr.proc_pointer = 1;
4176 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4178 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4179 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4180 && sym->result && sym->result != sym && sym->result->attr.external
4181 && sym == gfc_current_ns->proc_name
4182 && sym == sym->result->ns->proc_name
4183 && strcmp ("ppr@", sym->result->name) == 0)
4185 sym->result->attr.proc_pointer = 1;
4186 sym->attr.pointer = 0;
4194 /* Match the interface for a PROCEDURE declaration,
4195 including brackets (R1212). */
4198 match_procedure_interface (gfc_symbol **proc_if)
4202 locus old_loc, entry_loc;
4203 gfc_namespace *old_ns = gfc_current_ns;
4204 char name[GFC_MAX_SYMBOL_LEN + 1];
4206 old_loc = entry_loc = gfc_current_locus;
4207 gfc_clear_ts (¤t_ts);
4209 if (gfc_match (" (") != MATCH_YES)
4211 gfc_current_locus = entry_loc;
4215 /* Get the type spec. for the procedure interface. */
4216 old_loc = gfc_current_locus;
4217 m = gfc_match_decl_type_spec (¤t_ts, 0);
4218 gfc_gobble_whitespace ();
4219 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4222 if (m == MATCH_ERROR)
4225 /* Procedure interface is itself a procedure. */
4226 gfc_current_locus = old_loc;
4227 m = gfc_match_name (name);
4229 /* First look to see if it is already accessible in the current
4230 namespace because it is use associated or contained. */
4232 if (gfc_find_sym_tree (name, NULL, 0, &st))
4235 /* If it is still not found, then try the parent namespace, if it
4236 exists and create the symbol there if it is still not found. */
4237 if (gfc_current_ns->parent)
4238 gfc_current_ns = gfc_current_ns->parent;
4239 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4242 gfc_current_ns = old_ns;
4243 *proc_if = st->n.sym;
4245 /* Various interface checks. */
4249 /* Resolve interface if possible. That way, attr.procedure is only set
4250 if it is declared by a later procedure-declaration-stmt, which is
4251 invalid per C1212. */
4252 while ((*proc_if)->ts.interface)
4253 *proc_if = (*proc_if)->ts.interface;
4255 if ((*proc_if)->generic)
4257 gfc_error ("Interface '%s' at %C may not be generic",
4261 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4263 gfc_error ("Interface '%s' at %C may not be a statement function",
4267 /* Handle intrinsic procedures. */
4268 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4269 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4270 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4271 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4272 (*proc_if)->attr.intrinsic = 1;
4273 if ((*proc_if)->attr.intrinsic
4274 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4276 gfc_error ("Intrinsic procedure '%s' not allowed "
4277 "in PROCEDURE statement at %C", (*proc_if)->name);
4283 if (gfc_match (" )") != MATCH_YES)
4285 gfc_current_locus = entry_loc;
4293 /* Match a PROCEDURE declaration (R1211). */
4296 match_procedure_decl (void)
4299 gfc_symbol *sym, *proc_if = NULL;
4301 gfc_expr *initializer = NULL;
4303 /* Parse interface (with brackets). */
4304 m = match_procedure_interface (&proc_if);
4308 /* Parse attributes (with colons). */
4309 m = match_attr_spec();
4310 if (m == MATCH_ERROR)
4313 /* Get procedure symbols. */
4316 m = gfc_match_symbol (&sym, 0);
4319 else if (m == MATCH_ERROR)
4322 /* Add current_attr to the symbol attributes. */
4323 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4326 if (sym->attr.is_bind_c)
4328 /* Check for C1218. */
4329 if (!proc_if || !proc_if->attr.is_bind_c)
4331 gfc_error ("BIND(C) attribute at %C requires "
4332 "an interface with BIND(C)");
4335 /* Check for C1217. */
4336 if (has_name_equals && sym->attr.pointer)
4338 gfc_error ("BIND(C) procedure with NAME may not have "
4339 "POINTER attribute at %C");
4342 if (has_name_equals && sym->attr.dummy)
4344 gfc_error ("Dummy procedure at %C may not have "
4345 "BIND(C) attribute with NAME");
4348 /* Set binding label for BIND(C). */
4349 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4353 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4356 if (add_hidden_procptr_result (sym) == SUCCESS)
4359 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4362 /* Set interface. */
4363 if (proc_if != NULL)
4365 if (sym->ts.type != BT_UNKNOWN)
4367 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4368 sym->name, &gfc_current_locus,
4369 gfc_basic_typename (sym->ts.type));
4372 sym->ts.interface = proc_if;
4373 sym->attr.untyped = 1;
4374 sym->attr.if_source = IFSRC_IFBODY;
4376 else if (current_ts.type != BT_UNKNOWN)
4378 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4380 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4381 sym->ts.interface->ts = current_ts;
4382 sym->ts.interface->attr.function = 1;
4383 sym->attr.function = sym->ts.interface->attr.function;
4384 sym->attr.if_source = IFSRC_UNKNOWN;
4387 if (gfc_match (" =>") == MATCH_YES)
4389 if (!current_attr.pointer)
4391 gfc_error ("Initialization at %C isn't for a pointer variable");
4396 m = gfc_match_null (&initializer);
4399 gfc_error ("Pointer initialization requires a NULL() at %C");
4403 if (gfc_pure (NULL))
4405 gfc_error ("Initialization of pointer at %C is not allowed in "
4406 "a PURE procedure");
4413 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4419 gfc_set_sym_referenced (sym);
4421 if (gfc_match_eos () == MATCH_YES)
4423 if (gfc_match_char (',') != MATCH_YES)
4428 gfc_error ("Syntax error in PROCEDURE statement at %C");
4432 /* Free stuff up and return. */
4433 gfc_free_expr (initializer);
4439 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4442 /* Match a procedure pointer component declaration (R445). */
4445 match_ppc_decl (void)
4448 gfc_symbol *proc_if = NULL;
4452 gfc_expr *initializer = NULL;
4453 gfc_typebound_proc* tb;
4454 char name[GFC_MAX_SYMBOL_LEN + 1];
4456 /* Parse interface (with brackets). */
4457 m = match_procedure_interface (&proc_if);
4461 /* Parse attributes. */
4462 tb = XCNEW (gfc_typebound_proc);
4463 tb->where = gfc_current_locus;
4464 m = match_binding_attributes (tb, false, true);
4465 if (m == MATCH_ERROR)
4468 gfc_clear_attr (¤t_attr);
4469 current_attr.procedure = 1;
4470 current_attr.proc_pointer = 1;
4471 current_attr.access = tb->access;
4472 current_attr.flavor = FL_PROCEDURE;
4474 /* Match the colons (required). */
4475 if (gfc_match (" ::") != MATCH_YES)
4477 gfc_error ("Expected '::' after binding-attributes at %C");
4481 /* Check for C450. */
4482 if (!tb->nopass && proc_if == NULL)
4484 gfc_error("NOPASS or explicit interface required at %C");
4488 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4489 "component at %C") == FAILURE)
4492 /* Match PPC names. */
4496 m = gfc_match_name (name);
4499 else if (m == MATCH_ERROR)
4502 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4505 /* Add current_attr to the symbol attributes. */
4506 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4509 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4512 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4517 /* Set interface. */
4518 if (proc_if != NULL)
4520 c->ts.interface = proc_if;
4521 c->attr.untyped = 1;
4522 c->attr.if_source = IFSRC_IFBODY;
4524 else if (ts.type != BT_UNKNOWN)
4527 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4528 c->ts.interface->ts = ts;
4529 c->ts.interface->attr.function = 1;
4530 c->attr.function = c->ts.interface->attr.function;
4531 c->attr.if_source = IFSRC_UNKNOWN;
4534 if (gfc_match (" =>") == MATCH_YES)
4536 m = gfc_match_null (&initializer);
4539 gfc_error ("Pointer initialization requires a NULL() at %C");
4542 if (gfc_pure (NULL))
4544 gfc_error ("Initialization of pointer at %C is not allowed in "
4545 "a PURE procedure");
4550 gfc_free_expr (initializer);
4553 c->initializer = initializer;
4556 if (gfc_match_eos () == MATCH_YES)
4558 if (gfc_match_char (',') != MATCH_YES)
4563 gfc_error ("Syntax error in procedure pointer component at %C");
4568 /* Match a PROCEDURE declaration inside an interface (R1206). */
4571 match_procedure_in_interface (void)
4575 char name[GFC_MAX_SYMBOL_LEN + 1];
4577 if (current_interface.type == INTERFACE_NAMELESS
4578 || current_interface.type == INTERFACE_ABSTRACT)
4580 gfc_error ("PROCEDURE at %C must be in a generic interface");
4586 m = gfc_match_name (name);
4589 else if (m == MATCH_ERROR)
4591 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4594 if (gfc_add_interface (sym) == FAILURE)
4597 if (gfc_match_eos () == MATCH_YES)
4599 if (gfc_match_char (',') != MATCH_YES)
4606 gfc_error ("Syntax error in PROCEDURE statement at %C");
4611 /* General matcher for PROCEDURE declarations. */
4613 static match match_procedure_in_type (void);
4616 gfc_match_procedure (void)
4620 switch (gfc_current_state ())
4625 case COMP_SUBROUTINE:
4627 m = match_procedure_decl ();
4629 case COMP_INTERFACE:
4630 m = match_procedure_in_interface ();
4633 m = match_ppc_decl ();
4635 case COMP_DERIVED_CONTAINS:
4636 m = match_procedure_in_type ();
4645 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4653 /* Warn if a matched procedure has the same name as an intrinsic; this is
4654 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4655 parser-state-stack to find out whether we're in a module. */
4658 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4662 in_module = (gfc_state_stack->previous
4663 && gfc_state_stack->previous->state == COMP_MODULE);
4665 gfc_warn_intrinsic_shadow (sym, in_module, func);
4669 /* Match a function declaration. */
4672 gfc_match_function_decl (void)
4674 char name[GFC_MAX_SYMBOL_LEN + 1];
4675 gfc_symbol *sym, *result;
4679 match found_match; /* Status returned by match func. */
4681 if (gfc_current_state () != COMP_NONE
4682 && gfc_current_state () != COMP_INTERFACE
4683 && gfc_current_state () != COMP_CONTAINS)
4686 gfc_clear_ts (¤t_ts);
4688 old_loc = gfc_current_locus;
4690 m = gfc_match_prefix (¤t_ts);
4693 gfc_current_locus = old_loc;
4697 if (gfc_match ("function% %n", name) != MATCH_YES)
4699 gfc_current_locus = old_loc;
4702 if (get_proc_name (name, &sym, false))
4705 if (add_hidden_procptr_result (sym) == SUCCESS)
4708 gfc_new_block = sym;
4710 m = gfc_match_formal_arglist (sym, 0, 0);
4713 gfc_error ("Expected formal argument list in function "
4714 "definition at %C");
4718 else if (m == MATCH_ERROR)
4723 /* According to the draft, the bind(c) and result clause can
4724 come in either order after the formal_arg_list (i.e., either
4725 can be first, both can exist together or by themselves or neither
4726 one). Therefore, the match_result can't match the end of the
4727 string, and check for the bind(c) or result clause in either order. */
4728 found_match = gfc_match_eos ();
4730 /* Make sure that it isn't already declared as BIND(C). If it is, it
4731 must have been marked BIND(C) with a BIND(C) attribute and that is
4732 not allowed for procedures. */
4733 if (sym->attr.is_bind_c == 1)
4735 sym->attr.is_bind_c = 0;
4736 if (sym->old_symbol != NULL)
4737 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4738 "variables or common blocks",
4739 &(sym->old_symbol->declared_at));
4741 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4742 "variables or common blocks", &gfc_current_locus);
4745 if (found_match != MATCH_YES)
4747 /* If we haven't found the end-of-statement, look for a suffix. */
4748 suffix_match = gfc_match_suffix (sym, &result);
4749 if (suffix_match == MATCH_YES)
4750 /* Need to get the eos now. */
4751 found_match = gfc_match_eos ();
4753 found_match = suffix_match;
4756 if(found_match != MATCH_YES)
4760 /* Make changes to the symbol. */
4763 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4766 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4767 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4770 /* Delay matching the function characteristics until after the
4771 specification block by signalling kind=-1. */
4772 sym->declared_at = old_loc;
4773 if (current_ts.type != BT_UNKNOWN)
4774 current_ts.kind = -1;
4776 current_ts.kind = 0;
4780 if (current_ts.type != BT_UNKNOWN
4781 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4787 if (current_ts.type != BT_UNKNOWN
4788 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4791 sym->result = result;
4794 /* Warn if this procedure has the same name as an intrinsic. */
4795 warn_intrinsic_shadow (sym, true);
4801 gfc_current_locus = old_loc;
4806 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4807 pass the name of the entry, rather than the gfc_current_block name, and
4808 to return false upon finding an existing global entry. */
4811 add_global_entry (const char *name, int sub)
4814 enum gfc_symbol_type type;
4816 s = gfc_get_gsymbol(name);
4817 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4820 || (s->type != GSYM_UNKNOWN
4821 && s->type != type))
4822 gfc_global_used(s, NULL);
4826 s->where = gfc_current_locus;
4828 s->ns = gfc_current_ns;
4835 /* Match an ENTRY statement. */
4838 gfc_match_entry (void)
4843 char name[GFC_MAX_SYMBOL_LEN + 1];
4844 gfc_compile_state state;
4848 bool module_procedure;
4852 m = gfc_match_name (name);
4856 state = gfc_current_state ();
4857 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4862 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4865 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4867 case COMP_BLOCK_DATA:
4868 gfc_error ("ENTRY statement at %C cannot appear within "
4871 case COMP_INTERFACE:
4872 gfc_error ("ENTRY statement at %C cannot appear within "
4876 gfc_error ("ENTRY statement at %C cannot appear within "
4877 "a DERIVED TYPE block");
4880 gfc_error ("ENTRY statement at %C cannot appear within "
4881 "an IF-THEN block");
4884 gfc_error ("ENTRY statement at %C cannot appear within "
4888 gfc_error ("ENTRY statement at %C cannot appear within "
4892 gfc_error ("ENTRY statement at %C cannot appear within "
4896 gfc_error ("ENTRY statement at %C cannot appear within "
4900 gfc_error ("ENTRY statement at %C cannot appear within "
4901 "a contained subprogram");
4904 gfc_internal_error ("gfc_match_entry(): Bad state");
4909 module_procedure = gfc_current_ns->parent != NULL
4910 && gfc_current_ns->parent->proc_name
4911 && gfc_current_ns->parent->proc_name->attr.flavor
4914 if (gfc_current_ns->parent != NULL
4915 && gfc_current_ns->parent->proc_name
4916 && !module_procedure)
4918 gfc_error("ENTRY statement at %C cannot appear in a "
4919 "contained procedure");
4923 /* Module function entries need special care in get_proc_name
4924 because previous references within the function will have
4925 created symbols attached to the current namespace. */
4926 if (get_proc_name (name, &entry,
4927 gfc_current_ns->parent != NULL
4928 && module_procedure))
4931 proc = gfc_current_block ();
4933 /* Make sure that it isn't already declared as BIND(C). If it is, it
4934 must have been marked BIND(C) with a BIND(C) attribute and that is
4935 not allowed for procedures. */
4936 if (entry->attr.is_bind_c == 1)
4938 entry->attr.is_bind_c = 0;
4939 if (entry->old_symbol != NULL)
4940 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4941 "variables or common blocks",
4942 &(entry->old_symbol->declared_at));
4944 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4945 "variables or common blocks", &gfc_current_locus);
4948 /* Check what next non-whitespace character is so we can tell if there
4949 is the required parens if we have a BIND(C). */
4950 gfc_gobble_whitespace ();
4951 peek_char = gfc_peek_ascii_char ();
4953 if (state == COMP_SUBROUTINE)
4955 /* An entry in a subroutine. */
4956 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4959 m = gfc_match_formal_arglist (entry, 0, 1);
4963 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4964 never be an internal procedure. */
4965 is_bind_c = gfc_match_bind_c (entry, true);
4966 if (is_bind_c == MATCH_ERROR)
4968 if (is_bind_c == MATCH_YES)
4970 if (peek_char != '(')
4972 gfc_error ("Missing required parentheses before BIND(C) at %C");
4975 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4980 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4981 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4986 /* An entry in a function.
4987 We need to take special care because writing
4992 ENTRY f() RESULT (r)
4994 ENTRY f RESULT (r). */
4995 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4998 old_loc = gfc_current_locus;
4999 if (gfc_match_eos () == MATCH_YES)
5001 gfc_current_locus = old_loc;
5002 /* Match the empty argument list, and add the interface to
5004 m = gfc_match_formal_arglist (entry, 0, 1);
5007 m = gfc_match_formal_arglist (entry, 0, 0);
5014 if (gfc_match_eos () == MATCH_YES)
5016 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5017 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5020 entry->result = entry;
5024 m = gfc_match_suffix (entry, &result);
5026 gfc_syntax_error (ST_ENTRY);
5032 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5033 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5034 || gfc_add_function (&entry->attr, result->name, NULL)
5037 entry->result = result;
5041 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5042 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5044 entry->result = entry;
5049 if (gfc_match_eos () != MATCH_YES)
5051 gfc_syntax_error (ST_ENTRY);
5055 entry->attr.recursive = proc->attr.recursive;
5056 entry->attr.elemental = proc->attr.elemental;
5057 entry->attr.pure = proc->attr.pure;
5059 el = gfc_get_entry_list ();
5061 el->next = gfc_current_ns->entries;
5062 gfc_current_ns->entries = el;
5064 el->id = el->next->id + 1;
5068 new_st.op = EXEC_ENTRY;
5069 new_st.ext.entry = el;
5075 /* Match a subroutine statement, including optional prefixes. */
5078 gfc_match_subroutine (void)
5080 char name[GFC_MAX_SYMBOL_LEN + 1];
5085 bool allow_binding_name;
5087 if (gfc_current_state () != COMP_NONE
5088 && gfc_current_state () != COMP_INTERFACE
5089 && gfc_current_state () != COMP_CONTAINS)
5092 m = gfc_match_prefix (NULL);
5096 m = gfc_match ("subroutine% %n", name);
5100 if (get_proc_name (name, &sym, false))
5103 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5104 the symbol existed before. */
5105 sym->declared_at = gfc_current_locus;
5107 if (add_hidden_procptr_result (sym) == SUCCESS)
5110 gfc_new_block = sym;
5112 /* Check what next non-whitespace character is so we can tell if there
5113 is the required parens if we have a BIND(C). */
5114 gfc_gobble_whitespace ();
5115 peek_char = gfc_peek_ascii_char ();
5117 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5120 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5123 /* Make sure that it isn't already declared as BIND(C). If it is, it
5124 must have been marked BIND(C) with a BIND(C) attribute and that is
5125 not allowed for procedures. */
5126 if (sym->attr.is_bind_c == 1)
5128 sym->attr.is_bind_c = 0;
5129 if (sym->old_symbol != NULL)
5130 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5131 "variables or common blocks",
5132 &(sym->old_symbol->declared_at));
5134 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5135 "variables or common blocks", &gfc_current_locus);
5138 /* C binding names are not allowed for internal procedures. */
5139 if (gfc_current_state () == COMP_CONTAINS
5140 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5141 allow_binding_name = false;
5143 allow_binding_name = true;
5145 /* Here, we are just checking if it has the bind(c) attribute, and if
5146 so, then we need to make sure it's all correct. If it doesn't,
5147 we still need to continue matching the rest of the subroutine line. */
5148 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5149 if (is_bind_c == MATCH_ERROR)
5151 /* There was an attempt at the bind(c), but it was wrong. An
5152 error message should have been printed w/in the gfc_match_bind_c
5153 so here we'll just return the MATCH_ERROR. */
5157 if (is_bind_c == MATCH_YES)
5159 /* The following is allowed in the Fortran 2008 draft. */
5160 if (gfc_current_state () == COMP_CONTAINS
5161 && sym->ns->proc_name->attr.flavor != FL_MODULE
5162 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5163 "at %L may not be specified for an internal "
5164 "procedure", &gfc_current_locus)
5168 if (peek_char != '(')
5170 gfc_error ("Missing required parentheses before BIND(C) at %C");
5173 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5178 if (gfc_match_eos () != MATCH_YES)
5180 gfc_syntax_error (ST_SUBROUTINE);
5184 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5187 /* Warn if it has the same name as an intrinsic. */
5188 warn_intrinsic_shadow (sym, false);
5194 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5195 given, and set the binding label in either the given symbol (if not
5196 NULL), or in the current_ts. The symbol may be NULL because we may
5197 encounter the BIND(C) before the declaration itself. Return
5198 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5199 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5200 or MATCH_YES if the specifier was correct and the binding label and
5201 bind(c) fields were set correctly for the given symbol or the
5202 current_ts. If allow_binding_name is false, no binding name may be
5206 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5208 /* binding label, if exists */
5209 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5213 /* Initialize the flag that specifies whether we encountered a NAME=
5214 specifier or not. */
5215 has_name_equals = 0;
5217 /* Init the first char to nil so we can catch if we don't have
5218 the label (name attr) or the symbol name yet. */
5219 binding_label[0] = '\0';
5221 /* This much we have to be able to match, in this order, if
5222 there is a bind(c) label. */
5223 if (gfc_match (" bind ( c ") != MATCH_YES)
5226 /* Now see if there is a binding label, or if we've reached the
5227 end of the bind(c) attribute without one. */
5228 if (gfc_match_char (',') == MATCH_YES)
5230 if (gfc_match (" name = ") != MATCH_YES)
5232 gfc_error ("Syntax error in NAME= specifier for binding label "
5234 /* should give an error message here */
5238 has_name_equals = 1;
5240 /* Get the opening quote. */
5241 double_quote = MATCH_YES;
5242 single_quote = MATCH_YES;
5243 double_quote = gfc_match_char ('"');
5244 if (double_quote != MATCH_YES)
5245 single_quote = gfc_match_char ('\'');
5246 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5248 gfc_error ("Syntax error in NAME= specifier for binding label "
5253 /* Grab the binding label, using functions that will not lower
5254 case the names automatically. */
5255 if (gfc_match_name_C (binding_label) != MATCH_YES)
5258 /* Get the closing quotation. */
5259 if (double_quote == MATCH_YES)
5261 if (gfc_match_char ('"') != MATCH_YES)
5263 gfc_error ("Missing closing quote '\"' for binding label at %C");
5264 /* User started string with '"' so looked to match it. */
5270 if (gfc_match_char ('\'') != MATCH_YES)
5272 gfc_error ("Missing closing quote '\'' for binding label at %C");
5273 /* User started string with "'" char. */
5279 /* Get the required right paren. */
5280 if (gfc_match_char (')') != MATCH_YES)
5282 gfc_error ("Missing closing paren for binding label at %C");
5286 if (has_name_equals && !allow_binding_name)
5288 gfc_error ("No binding name is allowed in BIND(C) at %C");
5292 if (has_name_equals && sym != NULL && sym->attr.dummy)
5294 gfc_error ("For dummy procedure %s, no binding name is "
5295 "allowed in BIND(C) at %C", sym->name);
5300 /* Save the binding label to the symbol. If sym is null, we're
5301 probably matching the typespec attributes of a declaration and
5302 haven't gotten the name yet, and therefore, no symbol yet. */
5303 if (binding_label[0] != '\0')
5307 strcpy (sym->binding_label, binding_label);
5310 strcpy (curr_binding_label, binding_label);
5312 else if (allow_binding_name)
5314 /* No binding label, but if symbol isn't null, we
5315 can set the label for it here.
5316 If name="" or allow_binding_name is false, no C binding name is
5318 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5319 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5322 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5323 && current_interface.type == INTERFACE_ABSTRACT)
5325 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5333 /* Return nonzero if we're currently compiling a contained procedure. */
5336 contained_procedure (void)
5338 gfc_state_data *s = gfc_state_stack;
5340 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5341 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5347 /* Set the kind of each enumerator. The kind is selected such that it is
5348 interoperable with the corresponding C enumeration type, making
5349 sure that -fshort-enums is honored. */
5354 enumerator_history *current_history = NULL;
5358 if (max_enum == NULL || enum_history == NULL)
5361 if (!flag_short_enums)
5367 kind = gfc_integer_kinds[i++].kind;
5369 while (kind < gfc_c_int_kind
5370 && gfc_check_integer_range (max_enum->initializer->value.integer,
5373 current_history = enum_history;
5374 while (current_history != NULL)
5376 current_history->sym->ts.kind = kind;
5377 current_history = current_history->next;
5382 /* Match any of the various end-block statements. Returns the type of
5383 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5384 and END BLOCK statements cannot be replaced by a single END statement. */
5387 gfc_match_end (gfc_statement *st)
5389 char name[GFC_MAX_SYMBOL_LEN + 1];
5390 gfc_compile_state state;
5392 const char *block_name;
5397 old_loc = gfc_current_locus;
5398 if (gfc_match ("end") != MATCH_YES)
5401 state = gfc_current_state ();
5402 block_name = gfc_current_block () == NULL
5403 ? NULL : gfc_current_block ()->name;
5405 if (state == COMP_BLOCK && !strcmp (block_name, "block@"))
5408 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5410 state = gfc_state_stack->previous->state;
5411 block_name = gfc_state_stack->previous->sym == NULL
5412 ? NULL : gfc_state_stack->previous->sym->name;
5419 *st = ST_END_PROGRAM;
5420 target = " program";
5424 case COMP_SUBROUTINE:
5425 *st = ST_END_SUBROUTINE;
5426 target = " subroutine";
5427 eos_ok = !contained_procedure ();
5431 *st = ST_END_FUNCTION;
5432 target = " function";
5433 eos_ok = !contained_procedure ();
5436 case COMP_BLOCK_DATA:
5437 *st = ST_END_BLOCK_DATA;
5438 target = " block data";
5443 *st = ST_END_MODULE;
5448 case COMP_INTERFACE:
5449 *st = ST_END_INTERFACE;
5450 target = " interface";
5455 case COMP_DERIVED_CONTAINS:
5480 case COMP_SELECT_TYPE:
5481 *st = ST_END_SELECT;
5487 *st = ST_END_FORALL;
5502 last_initializer = NULL;
5504 gfc_free_enum_history ();
5508 gfc_error ("Unexpected END statement at %C");
5512 if (gfc_match_eos () == MATCH_YES)
5516 /* We would have required END [something]. */
5517 gfc_error ("%s statement expected at %L",
5518 gfc_ascii_statement (*st), &old_loc);
5525 /* Verify that we've got the sort of end-block that we're expecting. */
5526 if (gfc_match (target) != MATCH_YES)
5528 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5532 /* If we're at the end, make sure a block name wasn't required. */
5533 if (gfc_match_eos () == MATCH_YES)
5536 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5537 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK)
5543 gfc_error ("Expected block name of '%s' in %s statement at %C",
5544 block_name, gfc_ascii_statement (*st));
5549 /* END INTERFACE has a special handler for its several possible endings. */
5550 if (*st == ST_END_INTERFACE)
5551 return gfc_match_end_interface ();
5553 /* We haven't hit the end of statement, so what is left must be an
5555 m = gfc_match_space ();
5557 m = gfc_match_name (name);
5560 gfc_error ("Expected terminating name at %C");
5564 if (block_name == NULL)
5567 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5569 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5570 gfc_ascii_statement (*st));
5573 /* Procedure pointer as function result. */
5574 else if (strcmp (block_name, "ppr@") == 0
5575 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5577 gfc_error ("Expected label '%s' for %s statement at %C",
5578 gfc_current_block ()->ns->proc_name->name,
5579 gfc_ascii_statement (*st));
5583 if (gfc_match_eos () == MATCH_YES)
5587 gfc_syntax_error (*st);
5590 gfc_current_locus = old_loc;
5596 /***************** Attribute declaration statements ****************/
5598 /* Set the attribute of a single variable. */
5603 char name[GFC_MAX_SYMBOL_LEN + 1];
5611 m = gfc_match_name (name);
5615 if (find_special (name, &sym, false))
5618 var_locus = gfc_current_locus;
5620 /* Deal with possible array specification for certain attributes. */
5621 if (current_attr.dimension
5622 || current_attr.allocatable
5623 || current_attr.pointer
5624 || current_attr.target)
5626 m = gfc_match_array_spec (&as);
5627 if (m == MATCH_ERROR)
5630 if (current_attr.dimension && m == MATCH_NO)
5632 gfc_error ("Missing array specification at %L in DIMENSION "
5633 "statement", &var_locus);
5638 if (current_attr.dimension && sym->value)
5640 gfc_error ("Dimensions specified for %s at %L after its "
5641 "initialisation", sym->name, &var_locus);
5646 if ((current_attr.allocatable || current_attr.pointer)
5647 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5649 gfc_error ("Array specification must be deferred at %L", &var_locus);
5655 /* Update symbol table. DIMENSION attribute is set in
5656 gfc_set_array_spec(). For CLASS variables, this must be applied
5657 to the first component, or '$data' field. */
5658 if (sym->ts.type == BT_CLASS && sym->ts.u.derived)
5660 gfc_component *comp;
5661 comp = gfc_find_component (sym->ts.u.derived, "$data", true, true);
5662 if (comp == NULL || gfc_copy_attr (&comp->attr, ¤t_attr,
5663 &var_locus) == FAILURE)
5668 sym->attr.class_ok = (sym->attr.class_ok
5669 || current_attr.allocatable
5670 || current_attr.pointer);
5674 if (current_attr.dimension == 0
5675 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5682 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5688 if (sym->attr.cray_pointee && sym->as != NULL)
5690 /* Fix the array spec. */
5691 m = gfc_mod_pointee_as (sym->as);
5692 if (m == MATCH_ERROR)
5696 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5702 if ((current_attr.external || current_attr.intrinsic)
5703 && sym->attr.flavor != FL_PROCEDURE
5704 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5710 add_hidden_procptr_result (sym);
5715 gfc_free_array_spec (as);
5720 /* Generic attribute declaration subroutine. Used for attributes that
5721 just have a list of names. */
5728 /* Gobble the optional double colon, by simply ignoring the result
5738 if (gfc_match_eos () == MATCH_YES)
5744 if (gfc_match_char (',') != MATCH_YES)
5746 gfc_error ("Unexpected character in variable list at %C");
5756 /* This routine matches Cray Pointer declarations of the form:
5757 pointer ( <pointer>, <pointee> )
5759 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5760 The pointer, if already declared, should be an integer. Otherwise, we
5761 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5762 be either a scalar, or an array declaration. No space is allocated for
5763 the pointee. For the statement
5764 pointer (ipt, ar(10))
5765 any subsequent uses of ar will be translated (in C-notation) as
5766 ar(i) => ((<type> *) ipt)(i)
5767 After gimplification, pointee variable will disappear in the code. */
5770 cray_pointer_decl (void)
5774 gfc_symbol *cptr; /* Pointer symbol. */
5775 gfc_symbol *cpte; /* Pointee symbol. */
5781 if (gfc_match_char ('(') != MATCH_YES)
5783 gfc_error ("Expected '(' at %C");
5787 /* Match pointer. */
5788 var_locus = gfc_current_locus;
5789 gfc_clear_attr (¤t_attr);
5790 gfc_add_cray_pointer (¤t_attr, &var_locus);
5791 current_ts.type = BT_INTEGER;
5792 current_ts.kind = gfc_index_integer_kind;
5794 m = gfc_match_symbol (&cptr, 0);
5797 gfc_error ("Expected variable name at %C");
5801 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5804 gfc_set_sym_referenced (cptr);
5806 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5808 cptr->ts.type = BT_INTEGER;
5809 cptr->ts.kind = gfc_index_integer_kind;
5811 else if (cptr->ts.type != BT_INTEGER)
5813 gfc_error ("Cray pointer at %C must be an integer");
5816 else if (cptr->ts.kind < gfc_index_integer_kind)
5817 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5818 " memory addresses require %d bytes",
5819 cptr->ts.kind, gfc_index_integer_kind);
5821 if (gfc_match_char (',') != MATCH_YES)
5823 gfc_error ("Expected \",\" at %C");
5827 /* Match Pointee. */
5828 var_locus = gfc_current_locus;
5829 gfc_clear_attr (¤t_attr);
5830 gfc_add_cray_pointee (¤t_attr, &var_locus);
5831 current_ts.type = BT_UNKNOWN;
5832 current_ts.kind = 0;
5834 m = gfc_match_symbol (&cpte, 0);
5837 gfc_error ("Expected variable name at %C");
5841 /* Check for an optional array spec. */
5842 m = gfc_match_array_spec (&as);
5843 if (m == MATCH_ERROR)
5845 gfc_free_array_spec (as);
5848 else if (m == MATCH_NO)
5850 gfc_free_array_spec (as);
5854 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5857 gfc_set_sym_referenced (cpte);
5859 if (cpte->as == NULL)
5861 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5862 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5864 else if (as != NULL)
5866 gfc_error ("Duplicate array spec for Cray pointee at %C");
5867 gfc_free_array_spec (as);
5873 if (cpte->as != NULL)
5875 /* Fix array spec. */
5876 m = gfc_mod_pointee_as (cpte->as);
5877 if (m == MATCH_ERROR)
5881 /* Point the Pointee at the Pointer. */
5882 cpte->cp_pointer = cptr;
5884 if (gfc_match_char (')') != MATCH_YES)
5886 gfc_error ("Expected \")\" at %C");
5889 m = gfc_match_char (',');
5891 done = true; /* Stop searching for more declarations. */
5895 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5896 || gfc_match_eos () != MATCH_YES)
5898 gfc_error ("Expected \",\" or end of statement at %C");
5906 gfc_match_external (void)
5909 gfc_clear_attr (¤t_attr);
5910 current_attr.external = 1;
5912 return attr_decl ();
5917 gfc_match_intent (void)
5921 /* This is not allowed within a BLOCK construct! */
5922 if (gfc_current_state () == COMP_BLOCK)
5924 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
5928 intent = match_intent_spec ();
5929 if (intent == INTENT_UNKNOWN)
5932 gfc_clear_attr (¤t_attr);
5933 current_attr.intent = intent;
5935 return attr_decl ();
5940 gfc_match_intrinsic (void)
5943 gfc_clear_attr (¤t_attr);
5944 current_attr.intrinsic = 1;
5946 return attr_decl ();
5951 gfc_match_optional (void)
5953 /* This is not allowed within a BLOCK construct! */
5954 if (gfc_current_state () == COMP_BLOCK)
5956 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
5960 gfc_clear_attr (¤t_attr);
5961 current_attr.optional = 1;
5963 return attr_decl ();
5968 gfc_match_pointer (void)
5970 gfc_gobble_whitespace ();
5971 if (gfc_peek_ascii_char () == '(')
5973 if (!gfc_option.flag_cray_pointer)
5975 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5979 return cray_pointer_decl ();
5983 gfc_clear_attr (¤t_attr);
5984 current_attr.pointer = 1;
5986 return attr_decl ();
5992 gfc_match_allocatable (void)
5994 gfc_clear_attr (¤t_attr);
5995 current_attr.allocatable = 1;
5997 return attr_decl ();
6002 gfc_match_dimension (void)
6004 gfc_clear_attr (¤t_attr);
6005 current_attr.dimension = 1;
6007 return attr_decl ();
6012 gfc_match_target (void)
6014 gfc_clear_attr (¤t_attr);
6015 current_attr.target = 1;
6017 return attr_decl ();
6021 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6025 access_attr_decl (gfc_statement st)
6027 char name[GFC_MAX_SYMBOL_LEN + 1];
6028 interface_type type;
6031 gfc_intrinsic_op op;
6034 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6039 m = gfc_match_generic_spec (&type, name, &op);
6042 if (m == MATCH_ERROR)
6047 case INTERFACE_NAMELESS:
6048 case INTERFACE_ABSTRACT:
6051 case INTERFACE_GENERIC:
6052 if (gfc_get_symbol (name, NULL, &sym))
6055 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6056 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6057 sym->name, NULL) == FAILURE)
6062 case INTERFACE_INTRINSIC_OP:
6063 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6065 gfc_current_ns->operator_access[op] =
6066 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6070 gfc_error ("Access specification of the %s operator at %C has "
6071 "already been specified", gfc_op2string (op));
6077 case INTERFACE_USER_OP:
6078 uop = gfc_get_uop (name);
6080 if (uop->access == ACCESS_UNKNOWN)
6082 uop->access = (st == ST_PUBLIC)
6083 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6087 gfc_error ("Access specification of the .%s. operator at %C "
6088 "has already been specified", sym->name);
6095 if (gfc_match_char (',') == MATCH_NO)
6099 if (gfc_match_eos () != MATCH_YES)
6104 gfc_syntax_error (st);
6112 gfc_match_protected (void)
6117 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6119 gfc_error ("PROTECTED at %C only allowed in specification "
6120 "part of a module");
6125 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6129 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6134 if (gfc_match_eos () == MATCH_YES)
6139 m = gfc_match_symbol (&sym, 0);
6143 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6156 if (gfc_match_eos () == MATCH_YES)
6158 if (gfc_match_char (',') != MATCH_YES)
6165 gfc_error ("Syntax error in PROTECTED statement at %C");
6170 /* The PRIVATE statement is a bit weird in that it can be an attribute
6171 declaration, but also works as a standalone statement inside of a
6172 type declaration or a module. */
6175 gfc_match_private (gfc_statement *st)
6178 if (gfc_match ("private") != MATCH_YES)
6181 if (gfc_current_state () != COMP_MODULE
6182 && !(gfc_current_state () == COMP_DERIVED
6183 && gfc_state_stack->previous
6184 && gfc_state_stack->previous->state == COMP_MODULE)
6185 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6186 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6187 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6189 gfc_error ("PRIVATE statement at %C is only allowed in the "
6190 "specification part of a module");
6194 if (gfc_current_state () == COMP_DERIVED)
6196 if (gfc_match_eos () == MATCH_YES)
6202 gfc_syntax_error (ST_PRIVATE);
6206 if (gfc_match_eos () == MATCH_YES)
6213 return access_attr_decl (ST_PRIVATE);
6218 gfc_match_public (gfc_statement *st)
6221 if (gfc_match ("public") != MATCH_YES)
6224 if (gfc_current_state () != COMP_MODULE)
6226 gfc_error ("PUBLIC statement at %C is only allowed in the "
6227 "specification part of a module");
6231 if (gfc_match_eos () == MATCH_YES)
6238 return access_attr_decl (ST_PUBLIC);
6242 /* Workhorse for gfc_match_parameter. */
6252 m = gfc_match_symbol (&sym, 0);
6254 gfc_error ("Expected variable name at %C in PARAMETER statement");
6259 if (gfc_match_char ('=') == MATCH_NO)
6261 gfc_error ("Expected = sign in PARAMETER statement at %C");
6265 m = gfc_match_init_expr (&init);
6267 gfc_error ("Expected expression at %C in PARAMETER statement");
6271 if (sym->ts.type == BT_UNKNOWN
6272 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6278 if (gfc_check_assign_symbol (sym, init) == FAILURE
6279 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6287 gfc_error ("Initializing already initialized variable at %C");
6292 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6293 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6296 gfc_free_expr (init);
6301 /* Match a parameter statement, with the weird syntax that these have. */
6304 gfc_match_parameter (void)
6308 if (gfc_match_char ('(') == MATCH_NO)
6317 if (gfc_match (" )%t") == MATCH_YES)
6320 if (gfc_match_char (',') != MATCH_YES)
6322 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6332 /* Save statements have a special syntax. */
6335 gfc_match_save (void)
6337 char n[GFC_MAX_SYMBOL_LEN+1];
6342 if (gfc_match_eos () == MATCH_YES)
6344 if (gfc_current_ns->seen_save)
6346 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6347 "follows previous SAVE statement")
6352 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6356 if (gfc_current_ns->save_all)
6358 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6359 "blanket SAVE statement")
6368 m = gfc_match_symbol (&sym, 0);
6372 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6384 m = gfc_match (" / %n /", &n);
6385 if (m == MATCH_ERROR)
6390 c = gfc_get_common (n, 0);
6393 gfc_current_ns->seen_save = 1;
6396 if (gfc_match_eos () == MATCH_YES)
6398 if (gfc_match_char (',') != MATCH_YES)
6405 gfc_error ("Syntax error in SAVE statement at %C");
6411 gfc_match_value (void)
6416 /* This is not allowed within a BLOCK construct! */
6417 if (gfc_current_state () == COMP_BLOCK)
6419 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6423 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6427 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6432 if (gfc_match_eos () == MATCH_YES)
6437 m = gfc_match_symbol (&sym, 0);
6441 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6454 if (gfc_match_eos () == MATCH_YES)
6456 if (gfc_match_char (',') != MATCH_YES)
6463 gfc_error ("Syntax error in VALUE statement at %C");
6469 gfc_match_volatile (void)
6474 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6478 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6483 if (gfc_match_eos () == MATCH_YES)
6488 /* VOLATILE is special because it can be added to host-associated
6490 m = gfc_match_symbol (&sym, 1);
6494 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6507 if (gfc_match_eos () == MATCH_YES)
6509 if (gfc_match_char (',') != MATCH_YES)
6516 gfc_error ("Syntax error in VOLATILE statement at %C");
6522 gfc_match_asynchronous (void)
6527 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C")
6531 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6536 if (gfc_match_eos () == MATCH_YES)
6541 /* ASYNCHRONOUS is special because it can be added to host-associated
6543 m = gfc_match_symbol (&sym, 1);
6547 if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)
6560 if (gfc_match_eos () == MATCH_YES)
6562 if (gfc_match_char (',') != MATCH_YES)
6569 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6574 /* Match a module procedure statement. Note that we have to modify
6575 symbols in the parent's namespace because the current one was there
6576 to receive symbols that are in an interface's formal argument list. */
6579 gfc_match_modproc (void)
6581 char name[GFC_MAX_SYMBOL_LEN + 1];
6584 gfc_namespace *module_ns;
6585 gfc_interface *old_interface_head, *interface;
6587 if (gfc_state_stack->state != COMP_INTERFACE
6588 || gfc_state_stack->previous == NULL
6589 || current_interface.type == INTERFACE_NAMELESS
6590 || current_interface.type == INTERFACE_ABSTRACT)
6592 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6597 module_ns = gfc_current_ns->parent;
6598 for (; module_ns; module_ns = module_ns->parent)
6599 if (module_ns->proc_name->attr.flavor == FL_MODULE
6600 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6601 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6602 && !module_ns->proc_name->attr.contained))
6605 if (module_ns == NULL)
6608 /* Store the current state of the interface. We will need it if we
6609 end up with a syntax error and need to recover. */
6610 old_interface_head = gfc_current_interface_head ();
6614 locus old_locus = gfc_current_locus;
6617 m = gfc_match_name (name);
6623 /* Check for syntax error before starting to add symbols to the
6624 current namespace. */
6625 if (gfc_match_eos () == MATCH_YES)
6627 if (!last && gfc_match_char (',') != MATCH_YES)
6630 /* Now we're sure the syntax is valid, we process this item
6632 if (gfc_get_symbol (name, module_ns, &sym))
6635 if (sym->attr.intrinsic)
6637 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6638 "PROCEDURE", &old_locus);
6642 if (sym->attr.proc != PROC_MODULE
6643 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6644 sym->name, NULL) == FAILURE)
6647 if (gfc_add_interface (sym) == FAILURE)
6650 sym->attr.mod_proc = 1;
6651 sym->declared_at = old_locus;
6660 /* Restore the previous state of the interface. */
6661 interface = gfc_current_interface_head ();
6662 gfc_set_current_interface_head (old_interface_head);
6664 /* Free the new interfaces. */
6665 while (interface != old_interface_head)
6667 gfc_interface *i = interface->next;
6668 gfc_free (interface);
6672 /* And issue a syntax error. */
6673 gfc_syntax_error (ST_MODULE_PROC);
6678 /* Check a derived type that is being extended. */
6680 check_extended_derived_type (char *name)
6682 gfc_symbol *extended;
6684 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6686 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6692 gfc_error ("No such symbol in TYPE definition at %C");
6696 if (extended->attr.flavor != FL_DERIVED)
6698 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6699 "derived type", name);
6703 if (extended->attr.is_bind_c)
6705 gfc_error ("'%s' cannot be extended at %C because it "
6706 "is BIND(C)", extended->name);
6710 if (extended->attr.sequence)
6712 gfc_error ("'%s' cannot be extended at %C because it "
6713 "is a SEQUENCE type", extended->name);
6721 /* Match the optional attribute specifiers for a type declaration.
6722 Return MATCH_ERROR if an error is encountered in one of the handled
6723 attributes (public, private, bind(c)), MATCH_NO if what's found is
6724 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6725 checking on attribute conflicts needs to be done. */
6728 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6730 /* See if the derived type is marked as private. */
6731 if (gfc_match (" , private") == MATCH_YES)
6733 if (gfc_current_state () != COMP_MODULE)
6735 gfc_error ("Derived type at %C can only be PRIVATE in the "
6736 "specification part of a module");
6740 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6743 else if (gfc_match (" , public") == MATCH_YES)
6745 if (gfc_current_state () != COMP_MODULE)
6747 gfc_error ("Derived type at %C can only be PUBLIC in the "
6748 "specification part of a module");
6752 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6755 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6757 /* If the type is defined to be bind(c) it then needs to make
6758 sure that all fields are interoperable. This will
6759 need to be a semantic check on the finished derived type.
6760 See 15.2.3 (lines 9-12) of F2003 draft. */
6761 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6764 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6766 else if (gfc_match (" , abstract") == MATCH_YES)
6768 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6772 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6775 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6777 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6783 /* If we get here, something matched. */
6788 /* Assign a hash value for a derived type. The algorithm is that of
6789 SDBM. The hashed string is '[module_name #] derived_name'. */
6791 hash_value (gfc_symbol *sym)
6793 unsigned int hash = 0;
6797 /* Hash of the module or procedure name. */
6798 if (sym->module != NULL)
6800 else if (sym->ns && sym->ns->proc_name
6801 && sym->ns->proc_name->attr.flavor == FL_MODULE)
6802 c = sym->ns->proc_name->name;
6809 for (i = 0; i < len; i++, c++)
6810 hash = (hash << 6) + (hash << 16) - hash + (*c);
6812 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
6813 hash = (hash << 6) + (hash << 16) - hash + '#';
6816 /* Hash of the derived type name. */
6817 len = strlen (sym->name);
6819 for (i = 0; i < len; i++, c++)
6820 hash = (hash << 6) + (hash << 16) - hash + (*c);
6822 /* Return the hash but take the modulus for the sake of module read,
6823 even though this slightly increases the chance of collision. */
6824 return (hash % 100000000);
6828 /* Match the beginning of a derived type declaration. If a type name
6829 was the result of a function, then it is possible to have a symbol
6830 already to be known as a derived type yet have no components. */
6833 gfc_match_derived_decl (void)
6835 char name[GFC_MAX_SYMBOL_LEN + 1];
6836 char parent[GFC_MAX_SYMBOL_LEN + 1];
6837 symbol_attribute attr;
6839 gfc_symbol *extended;
6841 match is_type_attr_spec = MATCH_NO;
6842 bool seen_attr = false;
6844 if (gfc_current_state () == COMP_DERIVED)
6849 gfc_clear_attr (&attr);
6854 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6855 if (is_type_attr_spec == MATCH_ERROR)
6857 if (is_type_attr_spec == MATCH_YES)
6859 } while (is_type_attr_spec == MATCH_YES);
6861 /* Deal with derived type extensions. The extension attribute has
6862 been added to 'attr' but now the parent type must be found and
6865 extended = check_extended_derived_type (parent);
6867 if (parent[0] && !extended)
6870 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6872 gfc_error ("Expected :: in TYPE definition at %C");
6876 m = gfc_match (" %n%t", name);
6880 /* Make sure the name is not the name of an intrinsic type. */
6881 if (gfc_is_intrinsic_typename (name))
6883 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6888 if (gfc_get_symbol (name, NULL, &sym))
6891 if (sym->ts.type != BT_UNKNOWN)
6893 gfc_error ("Derived type name '%s' at %C already has a basic type "
6894 "of %s", sym->name, gfc_typename (&sym->ts));
6898 /* The symbol may already have the derived attribute without the
6899 components. The ways this can happen is via a function
6900 definition, an INTRINSIC statement or a subtype in another
6901 derived type that is a pointer. The first part of the AND clause
6902 is true if the symbol is not the return value of a function. */
6903 if (sym->attr.flavor != FL_DERIVED
6904 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6907 if (sym->components != NULL || sym->attr.zero_comp)
6909 gfc_error ("Derived type definition of '%s' at %C has already been "
6910 "defined", sym->name);
6914 if (attr.access != ACCESS_UNKNOWN
6915 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6918 /* See if the derived type was labeled as bind(c). */
6919 if (attr.is_bind_c != 0)
6920 sym->attr.is_bind_c = attr.is_bind_c;
6922 /* Construct the f2k_derived namespace if it is not yet there. */
6923 if (!sym->f2k_derived)
6924 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6926 if (extended && !sym->components)
6931 /* Add the extended derived type as the first component. */
6932 gfc_add_component (sym, parent, &p);
6934 gfc_set_sym_referenced (extended);
6936 p->ts.type = BT_DERIVED;
6937 p->ts.u.derived = extended;
6938 p->initializer = gfc_default_initializer (&p->ts);
6940 /* Set extension level. */
6941 if (extended->attr.extension == 255)
6943 /* Since the extension field is 8 bit wide, we can only have
6944 up to 255 extension levels. */
6945 gfc_error ("Maximum extension level reached with type '%s' at %L",
6946 extended->name, &extended->declared_at);
6949 sym->attr.extension = extended->attr.extension + 1;
6951 /* Provide the links between the extended type and its extension. */
6952 if (!extended->f2k_derived)
6953 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6954 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6958 if (!sym->hash_value)
6959 /* Set the hash for the compound name for this type. */
6960 sym->hash_value = hash_value (sym);
6962 /* Take over the ABSTRACT attribute. */
6963 sym->attr.abstract = attr.abstract;
6965 gfc_new_block = sym;
6971 /* Cray Pointees can be declared as:
6972 pointer (ipt, a (n,m,...,*)) */
6975 gfc_mod_pointee_as (gfc_array_spec *as)
6977 as->cray_pointee = true; /* This will be useful to know later. */
6978 if (as->type == AS_ASSUMED_SIZE)
6979 as->cp_was_assumed = true;
6980 else if (as->type == AS_ASSUMED_SHAPE)
6982 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6989 /* Match the enum definition statement, here we are trying to match
6990 the first line of enum definition statement.
6991 Returns MATCH_YES if match is found. */
6994 gfc_match_enum (void)
6998 m = gfc_match_eos ();
7002 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
7010 /* Returns an initializer whose value is one higher than the value of the
7011 LAST_INITIALIZER argument. If the argument is NULL, the
7012 initializers value will be set to zero. The initializer's kind
7013 will be set to gfc_c_int_kind.
7015 If -fshort-enums is given, the appropriate kind will be selected
7016 later after all enumerators have been parsed. A warning is issued
7017 here if an initializer exceeds gfc_c_int_kind. */
7020 enum_initializer (gfc_expr *last_initializer, locus where)
7024 result = gfc_get_expr ();
7025 result->expr_type = EXPR_CONSTANT;
7026 result->ts.type = BT_INTEGER;
7027 result->ts.kind = gfc_c_int_kind;
7028 result->where = where;
7030 mpz_init (result->value.integer);
7032 if (last_initializer != NULL)
7034 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
7035 result->where = last_initializer->where;
7037 if (gfc_check_integer_range (result->value.integer,
7038 gfc_c_int_kind) != ARITH_OK)
7040 gfc_error ("Enumerator exceeds the C integer type at %C");
7046 /* Control comes here, if it's the very first enumerator and no
7047 initializer has been given. It will be initialized to zero. */
7048 mpz_set_si (result->value.integer, 0);
7055 /* Match a variable name with an optional initializer. When this
7056 subroutine is called, a variable is expected to be parsed next.
7057 Depending on what is happening at the moment, updates either the
7058 symbol table or the current interface. */
7061 enumerator_decl (void)
7063 char name[GFC_MAX_SYMBOL_LEN + 1];
7064 gfc_expr *initializer;
7065 gfc_array_spec *as = NULL;
7073 old_locus = gfc_current_locus;
7075 /* When we get here, we've just matched a list of attributes and
7076 maybe a type and a double colon. The next thing we expect to see
7077 is the name of the symbol. */
7078 m = gfc_match_name (name);
7082 var_locus = gfc_current_locus;
7084 /* OK, we've successfully matched the declaration. Now put the
7085 symbol in the current namespace. If we fail to create the symbol,
7087 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7093 /* The double colon must be present in order to have initializers.
7094 Otherwise the statement is ambiguous with an assignment statement. */
7097 if (gfc_match_char ('=') == MATCH_YES)
7099 m = gfc_match_init_expr (&initializer);
7102 gfc_error ("Expected an initialization expression at %C");
7111 /* If we do not have an initializer, the initialization value of the
7112 previous enumerator (stored in last_initializer) is incremented
7113 by 1 and is used to initialize the current enumerator. */
7114 if (initializer == NULL)
7115 initializer = enum_initializer (last_initializer, old_locus);
7117 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7119 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7125 /* Store this current initializer, for the next enumerator variable
7126 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7127 use last_initializer below. */
7128 last_initializer = initializer;
7129 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7131 /* Maintain enumerator history. */
7132 gfc_find_symbol (name, NULL, 0, &sym);
7133 create_enum_history (sym, last_initializer);
7135 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7138 /* Free stuff up and return. */
7139 gfc_free_expr (initializer);
7145 /* Match the enumerator definition statement. */
7148 gfc_match_enumerator_def (void)
7153 gfc_clear_ts (¤t_ts);
7155 m = gfc_match (" enumerator");
7159 m = gfc_match (" :: ");
7160 if (m == MATCH_ERROR)
7163 colon_seen = (m == MATCH_YES);
7165 if (gfc_current_state () != COMP_ENUM)
7167 gfc_error ("ENUM definition statement expected before %C");
7168 gfc_free_enum_history ();
7172 (¤t_ts)->type = BT_INTEGER;
7173 (¤t_ts)->kind = gfc_c_int_kind;
7175 gfc_clear_attr (¤t_attr);
7176 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7185 m = enumerator_decl ();
7186 if (m == MATCH_ERROR)
7188 gfc_free_enum_history ();
7194 if (gfc_match_eos () == MATCH_YES)
7196 if (gfc_match_char (',') != MATCH_YES)
7200 if (gfc_current_state () == COMP_ENUM)
7202 gfc_free_enum_history ();
7203 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7208 gfc_free_array_spec (current_as);
7215 /* Match binding attributes. */
7218 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7220 bool found_passing = false;
7221 bool seen_ptr = false;
7222 match m = MATCH_YES;
7224 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7225 this case the defaults are in there. */
7226 ba->access = ACCESS_UNKNOWN;
7227 ba->pass_arg = NULL;
7228 ba->pass_arg_num = 0;
7230 ba->non_overridable = 0;
7234 /* If we find a comma, we believe there are binding attributes. */
7235 m = gfc_match_char (',');
7241 /* Access specifier. */
7243 m = gfc_match (" public");
7244 if (m == MATCH_ERROR)
7248 if (ba->access != ACCESS_UNKNOWN)
7250 gfc_error ("Duplicate access-specifier at %C");
7254 ba->access = ACCESS_PUBLIC;
7258 m = gfc_match (" private");
7259 if (m == MATCH_ERROR)
7263 if (ba->access != ACCESS_UNKNOWN)
7265 gfc_error ("Duplicate access-specifier at %C");
7269 ba->access = ACCESS_PRIVATE;
7273 /* If inside GENERIC, the following is not allowed. */
7278 m = gfc_match (" nopass");
7279 if (m == MATCH_ERROR)
7285 gfc_error ("Binding attributes already specify passing,"
7286 " illegal NOPASS at %C");
7290 found_passing = true;
7295 /* PASS possibly including argument. */
7296 m = gfc_match (" pass");
7297 if (m == MATCH_ERROR)
7301 char arg[GFC_MAX_SYMBOL_LEN + 1];
7305 gfc_error ("Binding attributes already specify passing,"
7306 " illegal PASS at %C");
7310 m = gfc_match (" ( %n )", arg);
7311 if (m == MATCH_ERROR)
7314 ba->pass_arg = gfc_get_string (arg);
7315 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7317 found_passing = true;
7325 m = gfc_match (" pointer");
7326 if (m == MATCH_ERROR)
7332 gfc_error ("Duplicate POINTER attribute at %C");
7342 /* NON_OVERRIDABLE flag. */
7343 m = gfc_match (" non_overridable");
7344 if (m == MATCH_ERROR)
7348 if (ba->non_overridable)
7350 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7354 ba->non_overridable = 1;
7358 /* DEFERRED flag. */
7359 m = gfc_match (" deferred");
7360 if (m == MATCH_ERROR)
7366 gfc_error ("Duplicate DEFERRED at %C");
7377 /* Nothing matching found. */
7379 gfc_error ("Expected access-specifier at %C");
7381 gfc_error ("Expected binding attribute at %C");
7384 while (gfc_match_char (',') == MATCH_YES);
7386 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7387 if (ba->non_overridable && ba->deferred)
7389 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7396 if (ba->access == ACCESS_UNKNOWN)
7397 ba->access = gfc_typebound_default_access;
7399 if (ppc && !seen_ptr)
7401 gfc_error ("POINTER attribute is required for procedure pointer component"
7413 /* Match a PROCEDURE specific binding inside a derived type. */
7416 match_procedure_in_type (void)
7418 char name[GFC_MAX_SYMBOL_LEN + 1];
7419 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7420 char* target = NULL;
7421 gfc_typebound_proc* tb;
7429 /* Check current state. */
7430 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7431 block = gfc_state_stack->previous->sym;
7434 /* Try to match PROCEDURE(interface). */
7435 if (gfc_match (" (") == MATCH_YES)
7437 m = gfc_match_name (target_buf);
7438 if (m == MATCH_ERROR)
7442 gfc_error ("Interface-name expected after '(' at %C");
7446 if (gfc_match (" )") != MATCH_YES)
7448 gfc_error ("')' expected at %C");
7452 target = target_buf;
7455 /* Construct the data structure. */
7456 tb = gfc_get_typebound_proc ();
7457 tb->where = gfc_current_locus;
7460 /* Match binding attributes. */
7461 m = match_binding_attributes (tb, false, false);
7462 if (m == MATCH_ERROR)
7464 seen_attrs = (m == MATCH_YES);
7466 /* Check that attribute DEFERRED is given iff an interface is specified, which
7467 means target != NULL. */
7468 if (tb->deferred && !target)
7470 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7473 if (target && !tb->deferred)
7475 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7479 /* Match the colons. */
7480 m = gfc_match (" ::");
7481 if (m == MATCH_ERROR)
7483 seen_colons = (m == MATCH_YES);
7484 if (seen_attrs && !seen_colons)
7486 gfc_error ("Expected '::' after binding-attributes at %C");
7490 /* Match the binding name. */
7491 m = gfc_match_name (name);
7492 if (m == MATCH_ERROR)
7496 gfc_error ("Expected binding name at %C");
7500 /* Try to match the '=> target', if it's there. */
7501 m = gfc_match (" =>");
7502 if (m == MATCH_ERROR)
7508 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7514 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7519 m = gfc_match_name (target_buf);
7520 if (m == MATCH_ERROR)
7524 gfc_error ("Expected binding target after '=>' at %C");
7527 target = target_buf;
7530 /* Now we should have the end. */
7531 m = gfc_match_eos ();
7532 if (m == MATCH_ERROR)
7536 gfc_error ("Junk after PROCEDURE declaration at %C");
7540 /* If no target was found, it has the same name as the binding. */
7544 /* Get the namespace to insert the symbols into. */
7545 ns = block->f2k_derived;
7548 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7549 if (tb->deferred && !block->attr.abstract)
7551 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7556 /* See if we already have a binding with this name in the symtree which would
7557 be an error. If a GENERIC already targetted this binding, it may be
7558 already there but then typebound is still NULL. */
7559 stree = gfc_find_symtree (ns->tb_sym_root, name);
7560 if (stree && stree->n.tb)
7562 gfc_error ("There's already a procedure with binding name '%s' for the"
7563 " derived type '%s' at %C", name, block->name);
7567 /* Insert it and set attributes. */
7571 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7576 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7578 gfc_set_sym_referenced (tb->u.specific->n.sym);
7584 /* Match a GENERIC procedure binding inside a derived type. */
7587 gfc_match_generic (void)
7589 char name[GFC_MAX_SYMBOL_LEN + 1];
7590 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7592 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7593 gfc_typebound_proc* tb;
7595 interface_type op_type;
7596 gfc_intrinsic_op op;
7599 /* Check current state. */
7600 if (gfc_current_state () == COMP_DERIVED)
7602 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7605 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7607 block = gfc_state_stack->previous->sym;
7608 ns = block->f2k_derived;
7609 gcc_assert (block && ns);
7611 /* See if we get an access-specifier. */
7612 m = match_binding_attributes (&tbattr, true, false);
7613 if (m == MATCH_ERROR)
7616 /* Now the colons, those are required. */
7617 if (gfc_match (" ::") != MATCH_YES)
7619 gfc_error ("Expected '::' at %C");
7623 /* Match the binding name; depending on type (operator / generic) format
7624 it for future error messages into bind_name. */
7626 m = gfc_match_generic_spec (&op_type, name, &op);
7627 if (m == MATCH_ERROR)
7631 gfc_error ("Expected generic name or operator descriptor at %C");
7637 case INTERFACE_GENERIC:
7638 snprintf (bind_name, sizeof (bind_name), "%s", name);
7641 case INTERFACE_USER_OP:
7642 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7645 case INTERFACE_INTRINSIC_OP:
7646 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7647 gfc_op2string (op));
7654 /* Match the required =>. */
7655 if (gfc_match (" =>") != MATCH_YES)
7657 gfc_error ("Expected '=>' at %C");
7661 /* Try to find existing GENERIC binding with this name / for this operator;
7662 if there is something, check that it is another GENERIC and then extend
7663 it rather than building a new node. Otherwise, create it and put it
7664 at the right position. */
7668 case INTERFACE_USER_OP:
7669 case INTERFACE_GENERIC:
7671 const bool is_op = (op_type == INTERFACE_USER_OP);
7674 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7686 case INTERFACE_INTRINSIC_OP:
7696 if (!tb->is_generic)
7698 gcc_assert (op_type == INTERFACE_GENERIC);
7699 gfc_error ("There's already a non-generic procedure with binding name"
7700 " '%s' for the derived type '%s' at %C",
7701 bind_name, block->name);
7705 if (tb->access != tbattr.access)
7707 gfc_error ("Binding at %C must have the same access as already"
7708 " defined binding '%s'", bind_name);
7714 tb = gfc_get_typebound_proc ();
7715 tb->where = gfc_current_locus;
7716 tb->access = tbattr.access;
7718 tb->u.generic = NULL;
7722 case INTERFACE_GENERIC:
7723 case INTERFACE_USER_OP:
7725 const bool is_op = (op_type == INTERFACE_USER_OP);
7728 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7736 case INTERFACE_INTRINSIC_OP:
7745 /* Now, match all following names as specific targets. */
7748 gfc_symtree* target_st;
7749 gfc_tbp_generic* target;
7751 m = gfc_match_name (name);
7752 if (m == MATCH_ERROR)
7756 gfc_error ("Expected specific binding name at %C");
7760 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7762 /* See if this is a duplicate specification. */
7763 for (target = tb->u.generic; target; target = target->next)
7764 if (target_st == target->specific_st)
7766 gfc_error ("'%s' already defined as specific binding for the"
7767 " generic '%s' at %C", name, bind_name);
7771 target = gfc_get_tbp_generic ();
7772 target->specific_st = target_st;
7773 target->specific = NULL;
7774 target->next = tb->u.generic;
7775 tb->u.generic = target;
7777 while (gfc_match (" ,") == MATCH_YES);
7779 /* Here should be the end. */
7780 if (gfc_match_eos () != MATCH_YES)
7782 gfc_error ("Junk after GENERIC binding at %C");
7793 /* Match a FINAL declaration inside a derived type. */
7796 gfc_match_final_decl (void)
7798 char name[GFC_MAX_SYMBOL_LEN + 1];
7801 gfc_namespace* module_ns;
7805 if (gfc_current_form == FORM_FREE)
7807 char c = gfc_peek_ascii_char ();
7808 if (!gfc_is_whitespace (c) && c != ':')
7812 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7814 if (gfc_current_form == FORM_FIXED)
7817 gfc_error ("FINAL declaration at %C must be inside a derived type "
7818 "CONTAINS section");
7822 block = gfc_state_stack->previous->sym;
7825 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7826 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7828 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7829 " specification part of a MODULE");
7833 module_ns = gfc_current_ns;
7834 gcc_assert (module_ns);
7835 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7837 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7838 if (gfc_match (" ::") == MATCH_ERROR)
7841 /* Match the sequence of procedure names. */
7848 if (first && gfc_match_eos () == MATCH_YES)
7850 gfc_error ("Empty FINAL at %C");
7854 m = gfc_match_name (name);
7857 gfc_error ("Expected module procedure name at %C");
7860 else if (m != MATCH_YES)
7863 if (gfc_match_eos () == MATCH_YES)
7865 if (!last && gfc_match_char (',') != MATCH_YES)
7867 gfc_error ("Expected ',' at %C");
7871 if (gfc_get_symbol (name, module_ns, &sym))
7873 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7877 /* Mark the symbol as module procedure. */
7878 if (sym->attr.proc != PROC_MODULE
7879 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7880 sym->name, NULL) == FAILURE)
7883 /* Check if we already have this symbol in the list, this is an error. */
7884 for (f = block->f2k_derived->finalizers; f; f = f->next)
7885 if (f->proc_sym == sym)
7887 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7892 /* Add this symbol to the list of finalizers. */
7893 gcc_assert (block->f2k_derived);
7895 f = XCNEW (gfc_finalizer);
7897 f->proc_tree = NULL;
7898 f->where = gfc_current_locus;
7899 f->next = block->f2k_derived->finalizers;
7900 block->f2k_derived->finalizers = f;
7910 const ext_attr_t ext_attr_list[] = {
7911 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
7912 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
7913 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
7914 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
7915 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
7916 { NULL, EXT_ATTR_LAST, NULL }
7919 /* Match a !GCC$ ATTRIBUTES statement of the form:
7920 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
7921 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
7923 TODO: We should support all GCC attributes using the same syntax for
7924 the attribute list, i.e. the list in C
7925 __attributes(( attribute-list ))
7927 !GCC$ ATTRIBUTES attribute-list ::
7928 Cf. c-parser.c's c_parser_attributes; the data can then directly be
7931 As there is absolutely no risk of confusion, we should never return
7934 gfc_match_gcc_attributes (void)
7936 symbol_attribute attr;
7937 char name[GFC_MAX_SYMBOL_LEN + 1];
7942 gfc_clear_attr (&attr);
7947 if (gfc_match_name (name) != MATCH_YES)
7950 for (id = 0; id < EXT_ATTR_LAST; id++)
7951 if (strcmp (name, ext_attr_list[id].name) == 0)
7954 if (id == EXT_ATTR_LAST)
7956 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
7960 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
7964 gfc_gobble_whitespace ();
7965 ch = gfc_next_ascii_char ();
7968 /* This is the successful exit condition for the loop. */
7969 if (gfc_next_ascii_char () == ':')
7979 if (gfc_match_eos () == MATCH_YES)
7984 m = gfc_match_name (name);
7988 if (find_special (name, &sym, true))
7991 sym->attr.ext_attr |= attr.ext_attr;
7993 if (gfc_match_eos () == MATCH_YES)
7996 if (gfc_match_char (',') != MATCH_YES)
8003 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");