1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008
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/>. */
29 /* Macros to access allocate memory for gfc_data_variable,
30 gfc_data_value and gfc_data. */
31 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
32 #define gfc_get_data_value() XCNEW (gfc_data_value)
33 #define gfc_get_data() XCNEW (gfc_data)
36 /* This flag is set if an old-style length selector is matched
37 during a type-declaration statement. */
39 static int old_char_selector;
41 /* When variables acquire types and attributes from a declaration
42 statement, they get them from the following static variables. The
43 first part of a declaration sets these variables and the second
44 part copies these into symbol structures. */
46 static gfc_typespec current_ts;
48 static symbol_attribute current_attr;
49 static gfc_array_spec *current_as;
50 static int colon_seen;
52 /* The current binding label (if any). */
53 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
54 /* Need to know how many identifiers are on the current data declaration
55 line in case we're given the BIND(C) attribute with a NAME= specifier. */
56 static int num_idents_on_line;
57 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
58 can supply a name if the curr_binding_label is nil and NAME= was not. */
59 static int has_name_equals = 0;
61 /* Initializer of the previous enumerator. */
63 static gfc_expr *last_initializer;
65 /* History of all the enumerators is maintained, so that
66 kind values of all the enumerators could be updated depending
67 upon the maximum initialized value. */
69 typedef struct enumerator_history
72 gfc_expr *initializer;
73 struct enumerator_history *next;
77 /* Header of enum history chain. */
79 static enumerator_history *enum_history = NULL;
81 /* Pointer of enum history node containing largest initializer. */
83 static enumerator_history *max_enum = NULL;
85 /* gfc_new_block points to the symbol of a newly matched block. */
87 gfc_symbol *gfc_new_block;
89 bool gfc_matching_function;
92 /********************* DATA statement subroutines *********************/
94 static bool in_match_data = false;
97 gfc_in_match_data (void)
103 set_in_match_data (bool set_value)
105 in_match_data = set_value;
108 /* Free a gfc_data_variable structure and everything beneath it. */
111 free_variable (gfc_data_variable *p)
113 gfc_data_variable *q;
118 gfc_free_expr (p->expr);
119 gfc_free_iterator (&p->iter, 0);
120 free_variable (p->list);
126 /* Free a gfc_data_value structure and everything beneath it. */
129 free_value (gfc_data_value *p)
136 gfc_free_expr (p->expr);
142 /* Free a list of gfc_data structures. */
145 gfc_free_data (gfc_data *p)
152 free_variable (p->var);
153 free_value (p->value);
159 /* Free all data in a namespace. */
162 gfc_free_data_all (gfc_namespace *ns)
175 static match var_element (gfc_data_variable *);
177 /* Match a list of variables terminated by an iterator and a right
181 var_list (gfc_data_variable *parent)
183 gfc_data_variable *tail, var;
186 m = var_element (&var);
187 if (m == MATCH_ERROR)
192 tail = gfc_get_data_variable ();
199 if (gfc_match_char (',') != MATCH_YES)
202 m = gfc_match_iterator (&parent->iter, 1);
205 if (m == MATCH_ERROR)
208 m = var_element (&var);
209 if (m == MATCH_ERROR)
214 tail->next = gfc_get_data_variable ();
220 if (gfc_match_char (')') != MATCH_YES)
225 gfc_syntax_error (ST_DATA);
230 /* Match a single element in a data variable list, which can be a
231 variable-iterator list. */
234 var_element (gfc_data_variable *new_var)
239 memset (new_var, 0, sizeof (gfc_data_variable));
241 if (gfc_match_char ('(') == MATCH_YES)
242 return var_list (new_var);
244 m = gfc_match_variable (&new_var->expr, 0);
248 sym = new_var->expr->symtree->n.sym;
250 /* Symbol should already have an associated type. */
251 if (gfc_check_symbol_typed (sym, gfc_current_ns,
252 false, gfc_current_locus) == FAILURE)
255 if (!sym->attr.function && gfc_current_ns->parent
256 && gfc_current_ns->parent == sym->ns)
258 gfc_error ("Host associated variable '%s' may not be in the DATA "
259 "statement at %C", sym->name);
263 if (gfc_current_state () != COMP_BLOCK_DATA
264 && sym->attr.in_common
265 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
266 "common block variable '%s' in DATA statement at %C",
267 sym->name) == FAILURE)
270 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
277 /* Match the top-level list of data variables. */
280 top_var_list (gfc_data *d)
282 gfc_data_variable var, *tail, *new_var;
289 m = var_element (&var);
292 if (m == MATCH_ERROR)
295 new_var = gfc_get_data_variable ();
301 tail->next = new_var;
305 if (gfc_match_char ('/') == MATCH_YES)
307 if (gfc_match_char (',') != MATCH_YES)
314 gfc_syntax_error (ST_DATA);
315 gfc_free_data_all (gfc_current_ns);
321 match_data_constant (gfc_expr **result)
323 char name[GFC_MAX_SYMBOL_LEN + 1];
329 m = gfc_match_literal_constant (&expr, 1);
336 if (m == MATCH_ERROR)
339 m = gfc_match_null (result);
343 old_loc = gfc_current_locus;
345 /* Should this be a structure component, try to match it
346 before matching a name. */
347 m = gfc_match_rvalue (result);
348 if (m == MATCH_ERROR)
351 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
353 if (gfc_simplify_expr (*result, 0) == FAILURE)
358 gfc_current_locus = old_loc;
360 m = gfc_match_name (name);
364 if (gfc_find_symbol (name, NULL, 1, &sym))
368 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
370 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
374 else if (sym->attr.flavor == FL_DERIVED)
375 return gfc_match_structure_constructor (sym, result, false);
377 /* Check to see if the value is an initialization array expression. */
378 if (sym->value->expr_type == EXPR_ARRAY)
380 gfc_current_locus = old_loc;
382 m = gfc_match_init_expr (result);
383 if (m == MATCH_ERROR)
388 if (gfc_simplify_expr (*result, 0) == FAILURE)
391 if ((*result)->expr_type == EXPR_CONSTANT)
395 gfc_error ("Invalid initializer %s in Data statement at %C", name);
401 *result = gfc_copy_expr (sym->value);
406 /* Match a list of values in a DATA statement. The leading '/' has
407 already been seen at this point. */
410 top_val_list (gfc_data *data)
412 gfc_data_value *new_val, *tail;
420 m = match_data_constant (&expr);
423 if (m == MATCH_ERROR)
426 new_val = gfc_get_data_value ();
427 mpz_init (new_val->repeat);
430 data->value = new_val;
432 tail->next = new_val;
436 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
439 mpz_set_ui (tail->repeat, 1);
443 if (expr->ts.type == BT_INTEGER)
444 mpz_set (tail->repeat, expr->value.integer);
445 gfc_free_expr (expr);
447 m = match_data_constant (&tail->expr);
450 if (m == MATCH_ERROR)
454 if (gfc_match_char ('/') == MATCH_YES)
456 if (gfc_match_char (',') == MATCH_NO)
463 gfc_syntax_error (ST_DATA);
464 gfc_free_data_all (gfc_current_ns);
469 /* Matches an old style initialization. */
472 match_old_style_init (const char *name)
479 /* Set up data structure to hold initializers. */
480 gfc_find_sym_tree (name, NULL, 0, &st);
483 newdata = gfc_get_data ();
484 newdata->var = gfc_get_data_variable ();
485 newdata->var->expr = gfc_get_variable_expr (st);
486 newdata->where = gfc_current_locus;
488 /* Match initial value list. This also eats the terminal '/'. */
489 m = top_val_list (newdata);
498 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
503 /* Mark the variable as having appeared in a data statement. */
504 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
510 /* Chain in namespace list of DATA initializers. */
511 newdata->next = gfc_current_ns->data;
512 gfc_current_ns->data = newdata;
518 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
519 we are matching a DATA statement and are therefore issuing an error
520 if we encounter something unexpected, if not, we're trying to match
521 an old-style initialization expression of the form INTEGER I /2/. */
524 gfc_match_data (void)
529 set_in_match_data (true);
533 new_data = gfc_get_data ();
534 new_data->where = gfc_current_locus;
536 m = top_var_list (new_data);
540 m = top_val_list (new_data);
544 new_data->next = gfc_current_ns->data;
545 gfc_current_ns->data = new_data;
547 if (gfc_match_eos () == MATCH_YES)
550 gfc_match_char (','); /* Optional comma */
553 set_in_match_data (false);
557 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
564 set_in_match_data (false);
565 gfc_free_data (new_data);
570 /************************ Declaration statements *********************/
572 /* Match an intent specification. Since this can only happen after an
573 INTENT word, a legal intent-spec must follow. */
576 match_intent_spec (void)
579 if (gfc_match (" ( in out )") == MATCH_YES)
581 if (gfc_match (" ( in )") == MATCH_YES)
583 if (gfc_match (" ( out )") == MATCH_YES)
586 gfc_error ("Bad INTENT specification at %C");
587 return INTENT_UNKNOWN;
591 /* Matches a character length specification, which is either a
592 specification expression or a '*'. */
595 char_len_param_value (gfc_expr **expr)
599 if (gfc_match_char ('*') == MATCH_YES)
605 m = gfc_match_expr (expr);
608 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
611 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
613 if ((*expr)->value.function.actual
614 && (*expr)->value.function.actual->expr->symtree)
617 e = (*expr)->value.function.actual->expr;
618 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
619 && e->expr_type == EXPR_VARIABLE)
621 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
623 if (e->symtree->n.sym->ts.type == BT_CHARACTER
624 && e->symtree->n.sym->ts.cl
625 && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN)
633 gfc_error ("Conflict in attributes of function argument at %C");
638 /* A character length is a '*' followed by a literal integer or a
639 char_len_param_value in parenthesis. */
642 match_char_length (gfc_expr **expr)
647 m = gfc_match_char ('*');
651 m = gfc_match_small_literal_int (&length, NULL);
652 if (m == MATCH_ERROR)
657 *expr = gfc_int_expr (length);
661 if (gfc_match_char ('(') == MATCH_NO)
664 m = char_len_param_value (expr);
665 if (m != MATCH_YES && gfc_matching_function)
671 if (m == MATCH_ERROR)
676 if (gfc_match_char (')') == MATCH_NO)
678 gfc_free_expr (*expr);
686 gfc_error ("Syntax error in character length specification at %C");
691 /* Special subroutine for finding a symbol. Check if the name is found
692 in the current name space. If not, and we're compiling a function or
693 subroutine and the parent compilation unit is an interface, then check
694 to see if the name we've been given is the name of the interface
695 (located in another namespace). */
698 find_special (const char *name, gfc_symbol **result)
703 i = gfc_get_symbol (name, NULL, result);
707 if (gfc_current_state () != COMP_SUBROUTINE
708 && gfc_current_state () != COMP_FUNCTION)
711 s = gfc_state_stack->previous;
715 if (s->state != COMP_INTERFACE)
718 goto end; /* Nameless interface. */
720 if (strcmp (name, s->sym->name) == 0)
731 /* Special subroutine for getting a symbol node associated with a
732 procedure name, used in SUBROUTINE and FUNCTION statements. The
733 symbol is created in the parent using with symtree node in the
734 child unit pointing to the symbol. If the current namespace has no
735 parent, then the symbol is just created in the current unit. */
738 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
744 /* Module functions have to be left in their own namespace because
745 they have potentially (almost certainly!) already been referenced.
746 In this sense, they are rather like external functions. This is
747 fixed up in resolve.c(resolve_entries), where the symbol name-
748 space is set to point to the master function, so that the fake
749 result mechanism can work. */
750 if (module_fcn_entry)
752 /* Present if entry is declared to be a module procedure. */
753 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
756 rc = gfc_get_symbol (name, NULL, result);
757 else if (!gfc_get_symbol (name, NULL, &sym) && sym
758 && (*result)->ts.type == BT_UNKNOWN
759 && sym->attr.flavor == FL_UNKNOWN)
760 /* Pick up the typespec for the entry, if declared in the function
761 body. Note that this symbol is FL_UNKNOWN because it will
762 only have appeared in a type declaration. The local symtree
763 is set to point to the module symbol and a unique symtree
764 to the local version. This latter ensures a correct clearing
767 /* If the ENTRY proceeds its specification, we need to ensure
768 that this does not raise a "has no IMPLICIT type" error. */
769 if (sym->ts.type == BT_UNKNOWN)
770 sym->attr.untyped = 1;
772 (*result)->ts = sym->ts;
774 /* Put the symbol in the procedure namespace so that, should
775 the ENTRY precede its specification, the specification
777 (*result)->ns = gfc_current_ns;
779 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
781 st = gfc_get_unique_symtree (gfc_current_ns);
786 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
792 gfc_current_ns->refs++;
794 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
796 /* Trap another encompassed procedure with the same name. All
797 these conditions are necessary to avoid picking up an entry
798 whose name clashes with that of the encompassing procedure;
799 this is handled using gsymbols to register unique,globally
801 if (sym->attr.flavor != 0
802 && sym->attr.proc != 0
803 && (sym->attr.subroutine || sym->attr.function)
804 && sym->attr.if_source != IFSRC_UNKNOWN)
805 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
806 name, &sym->declared_at);
808 /* Trap a procedure with a name the same as interface in the
809 encompassing scope. */
810 if (sym->attr.generic != 0
811 && (sym->attr.subroutine || sym->attr.function)
812 && !sym->attr.mod_proc)
813 gfc_error_now ("Name '%s' at %C is already defined"
814 " as a generic interface at %L",
815 name, &sym->declared_at);
817 /* Trap declarations of attributes in encompassing scope. The
818 signature for this is that ts.kind is set. Legitimate
819 references only set ts.type. */
820 if (sym->ts.kind != 0
821 && !sym->attr.implicit_type
822 && sym->attr.proc == 0
823 && gfc_current_ns->parent != NULL
824 && sym->attr.access == 0
825 && !module_fcn_entry)
826 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
827 "and must not have attributes declared at %L",
828 name, &sym->declared_at);
831 if (gfc_current_ns->parent == NULL || *result == NULL)
834 /* Module function entries will already have a symtree in
835 the current namespace but will need one at module level. */
836 if (module_fcn_entry)
838 /* Present if entry is declared to be a module procedure. */
839 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
841 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
844 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
849 /* See if the procedure should be a module procedure. */
851 if (((sym->ns->proc_name != NULL
852 && sym->ns->proc_name->attr.flavor == FL_MODULE
853 && sym->attr.proc != PROC_MODULE)
854 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
855 && gfc_add_procedure (&sym->attr, PROC_MODULE,
856 sym->name, NULL) == FAILURE)
863 /* Verify that the given symbol representing a parameter is C
864 interoperable, by checking to see if it was marked as such after
865 its declaration. If the given symbol is not interoperable, a
866 warning is reported, thus removing the need to return the status to
867 the calling function. The standard does not require the user use
868 one of the iso_c_binding named constants to declare an
869 interoperable parameter, but we can't be sure if the param is C
870 interop or not if the user doesn't. For example, integer(4) may be
871 legal Fortran, but doesn't have meaning in C. It may interop with
872 a number of the C types, which causes a problem because the
873 compiler can't know which one. This code is almost certainly not
874 portable, and the user will get what they deserve if the C type
875 across platforms isn't always interoperable with integer(4). If
876 the user had used something like integer(c_int) or integer(c_long),
877 the compiler could have automatically handled the varying sizes
881 verify_c_interop_param (gfc_symbol *sym)
883 int is_c_interop = 0;
884 gfc_try retval = SUCCESS;
886 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
887 Don't repeat the checks here. */
888 if (sym->attr.implicit_type)
891 /* For subroutines or functions that are passed to a BIND(C) procedure,
892 they're interoperable if they're BIND(C) and their params are all
894 if (sym->attr.flavor == FL_PROCEDURE)
896 if (sym->attr.is_bind_c == 0)
898 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
899 "attribute to be C interoperable", sym->name,
900 &(sym->declared_at));
906 if (sym->attr.is_c_interop == 1)
907 /* We've already checked this procedure; don't check it again. */
910 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
915 /* See if we've stored a reference to a procedure that owns sym. */
916 if (sym->ns != NULL && sym->ns->proc_name != NULL)
918 if (sym->ns->proc_name->attr.is_bind_c == 1)
921 (verify_c_interop (&(sym->ts))
924 if (is_c_interop != 1)
926 /* Make personalized messages to give better feedback. */
927 if (sym->ts.type == BT_DERIVED)
928 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
929 " procedure '%s' but is not C interoperable "
930 "because derived type '%s' is not C interoperable",
931 sym->name, &(sym->declared_at),
932 sym->ns->proc_name->name,
933 sym->ts.derived->name);
935 gfc_warning ("Variable '%s' at %L is a parameter to the "
936 "BIND(C) procedure '%s' but may not be C "
938 sym->name, &(sym->declared_at),
939 sym->ns->proc_name->name);
942 /* Character strings are only C interoperable if they have a
944 if (sym->ts.type == BT_CHARACTER)
946 gfc_charlen *cl = sym->ts.cl;
947 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
948 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
950 gfc_error ("Character argument '%s' at %L "
951 "must be length 1 because "
952 "procedure '%s' is BIND(C)",
953 sym->name, &sym->declared_at,
954 sym->ns->proc_name->name);
959 /* We have to make sure that any param to a bind(c) routine does
960 not have the allocatable, pointer, or optional attributes,
961 according to J3/04-007, section 5.1. */
962 if (sym->attr.allocatable == 1)
964 gfc_error ("Variable '%s' at %L cannot have the "
965 "ALLOCATABLE attribute because procedure '%s'"
966 " is BIND(C)", sym->name, &(sym->declared_at),
967 sym->ns->proc_name->name);
971 if (sym->attr.pointer == 1)
973 gfc_error ("Variable '%s' at %L cannot have the "
974 "POINTER attribute because procedure '%s'"
975 " is BIND(C)", sym->name, &(sym->declared_at),
976 sym->ns->proc_name->name);
980 if (sym->attr.optional == 1)
982 gfc_error ("Variable '%s' at %L cannot have the "
983 "OPTIONAL attribute because procedure '%s'"
984 " is BIND(C)", sym->name, &(sym->declared_at),
985 sym->ns->proc_name->name);
989 /* Make sure that if it has the dimension attribute, that it is
990 either assumed size or explicit shape. */
993 if (sym->as->type == AS_ASSUMED_SHAPE)
995 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
996 "argument to the procedure '%s' at %L because "
997 "the procedure is BIND(C)", sym->name,
998 &(sym->declared_at), sym->ns->proc_name->name,
999 &(sym->ns->proc_name->declared_at));
1003 if (sym->as->type == AS_DEFERRED)
1005 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1006 "argument to the procedure '%s' at %L because "
1007 "the procedure is BIND(C)", sym->name,
1008 &(sym->declared_at), sym->ns->proc_name->name,
1009 &(sym->ns->proc_name->declared_at));
1020 /* Function called by variable_decl() that adds a name to the symbol table. */
1023 build_sym (const char *name, gfc_charlen *cl,
1024 gfc_array_spec **as, locus *var_locus)
1026 symbol_attribute attr;
1029 if (gfc_get_symbol (name, NULL, &sym))
1032 /* Start updating the symbol table. Add basic type attribute if present. */
1033 if (current_ts.type != BT_UNKNOWN
1034 && (sym->attr.implicit_type == 0
1035 || !gfc_compare_types (&sym->ts, ¤t_ts))
1036 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1039 if (sym->ts.type == BT_CHARACTER)
1042 /* Add dimension attribute if present. */
1043 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1047 /* Add attribute to symbol. The copy is so that we can reset the
1048 dimension attribute. */
1049 attr = current_attr;
1052 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1055 /* Finish any work that may need to be done for the binding label,
1056 if it's a bind(c). The bind(c) attr is found before the symbol
1057 is made, and before the symbol name (for data decls), so the
1058 current_ts is holding the binding label, or nothing if the
1059 name= attr wasn't given. Therefore, test here if we're dealing
1060 with a bind(c) and make sure the binding label is set correctly. */
1061 if (sym->attr.is_bind_c == 1)
1063 if (sym->binding_label[0] == '\0')
1065 /* Set the binding label and verify that if a NAME= was specified
1066 then only one identifier was in the entity-decl-list. */
1067 if (set_binding_label (sym->binding_label, sym->name,
1068 num_idents_on_line) == FAILURE)
1073 /* See if we know we're in a common block, and if it's a bind(c)
1074 common then we need to make sure we're an interoperable type. */
1075 if (sym->attr.in_common == 1)
1077 /* Test the common block object. */
1078 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1079 && sym->ts.is_c_interop != 1)
1081 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1082 "must be declared with a C interoperable "
1083 "kind since common block '%s' is BIND(C)",
1084 sym->name, sym->common_block->name,
1085 sym->common_block->name);
1090 sym->attr.implied_index = 0;
1096 /* Set character constant to the given length. The constant will be padded or
1097 truncated. If we're inside an array constructor without a typespec, we
1098 additionally check that all elements have the same length; check_len -1
1099 means no checking. */
1102 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1107 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1108 gcc_assert (expr->ts.type == BT_CHARACTER);
1110 slen = expr->value.character.length;
1113 s = gfc_get_wide_string (len + 1);
1114 memcpy (s, expr->value.character.string,
1115 MIN (len, slen) * sizeof (gfc_char_t));
1117 gfc_wide_memset (&s[slen], ' ', len - slen);
1119 if (gfc_option.warn_character_truncation && slen > len)
1120 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1121 "(%d/%d)", &expr->where, slen, len);
1123 /* Apply the standard by 'hand' otherwise it gets cleared for
1125 if (check_len != -1 && slen != check_len
1126 && !(gfc_option.allow_std & GFC_STD_GNU))
1127 gfc_error_now ("The CHARACTER elements of the array constructor "
1128 "at %L must have the same length (%d/%d)",
1129 &expr->where, slen, check_len);
1132 gfc_free (expr->value.character.string);
1133 expr->value.character.string = s;
1134 expr->value.character.length = len;
1139 /* Function to create and update the enumerator history
1140 using the information passed as arguments.
1141 Pointer "max_enum" is also updated, to point to
1142 enum history node containing largest initializer.
1144 SYM points to the symbol node of enumerator.
1145 INIT points to its enumerator value. */
1148 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1150 enumerator_history *new_enum_history;
1151 gcc_assert (sym != NULL && init != NULL);
1153 new_enum_history = XCNEW (enumerator_history);
1155 new_enum_history->sym = sym;
1156 new_enum_history->initializer = init;
1157 new_enum_history->next = NULL;
1159 if (enum_history == NULL)
1161 enum_history = new_enum_history;
1162 max_enum = enum_history;
1166 new_enum_history->next = enum_history;
1167 enum_history = new_enum_history;
1169 if (mpz_cmp (max_enum->initializer->value.integer,
1170 new_enum_history->initializer->value.integer) < 0)
1171 max_enum = new_enum_history;
1176 /* Function to free enum kind history. */
1179 gfc_free_enum_history (void)
1181 enumerator_history *current = enum_history;
1182 enumerator_history *next;
1184 while (current != NULL)
1186 next = current->next;
1191 enum_history = NULL;
1195 /* Function called by variable_decl() that adds an initialization
1196 expression to a symbol. */
1199 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1201 symbol_attribute attr;
1206 if (find_special (name, &sym))
1211 /* If this symbol is confirming an implicit parameter type,
1212 then an initialization expression is not allowed. */
1213 if (attr.flavor == FL_PARAMETER
1214 && sym->value != NULL
1217 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1224 /* An initializer is required for PARAMETER declarations. */
1225 if (attr.flavor == FL_PARAMETER)
1227 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1233 /* If a variable appears in a DATA block, it cannot have an
1237 gfc_error ("Variable '%s' at %C with an initializer already "
1238 "appears in a DATA statement", sym->name);
1242 /* Check if the assignment can happen. This has to be put off
1243 until later for a derived type variable. */
1244 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1245 && gfc_check_assign_symbol (sym, init) == FAILURE)
1248 if (sym->ts.type == BT_CHARACTER && sym->ts.cl)
1250 /* Update symbol character length according initializer. */
1251 if (sym->ts.cl->length == NULL)
1254 /* If there are multiple CHARACTER variables declared on the
1255 same line, we don't want them to share the same length. */
1256 sym->ts.cl = gfc_get_charlen ();
1257 sym->ts.cl->next = gfc_current_ns->cl_list;
1258 gfc_current_ns->cl_list = sym->ts.cl;
1260 if (sym->attr.flavor == FL_PARAMETER)
1262 if (init->expr_type == EXPR_CONSTANT)
1264 clen = init->value.character.length;
1265 sym->ts.cl->length = gfc_int_expr (clen);
1267 else if (init->expr_type == EXPR_ARRAY)
1269 gfc_expr *p = init->value.constructor->expr;
1270 clen = p->value.character.length;
1271 sym->ts.cl->length = gfc_int_expr (clen);
1273 else if (init->ts.cl && init->ts.cl->length)
1274 sym->ts.cl->length =
1275 gfc_copy_expr (sym->value->ts.cl->length);
1278 /* Update initializer character length according symbol. */
1279 else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT)
1281 int len = mpz_get_si (sym->ts.cl->length->value.integer);
1282 gfc_constructor * p;
1284 if (init->expr_type == EXPR_CONSTANT)
1285 gfc_set_constant_character_len (len, init, -1);
1286 else if (init->expr_type == EXPR_ARRAY)
1288 /* Build a new charlen to prevent simplification from
1289 deleting the length before it is resolved. */
1290 init->ts.cl = gfc_get_charlen ();
1291 init->ts.cl->next = gfc_current_ns->cl_list;
1292 gfc_current_ns->cl_list = sym->ts.cl;
1293 init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length);
1295 for (p = init->value.constructor; p; p = p->next)
1296 gfc_set_constant_character_len (len, p->expr, -1);
1301 /* Need to check if the expression we initialized this
1302 to was one of the iso_c_binding named constants. If so,
1303 and we're a parameter (constant), let it be iso_c.
1305 integer(c_int), parameter :: my_int = c_int
1306 integer(my_int) :: my_int_2
1307 If we mark my_int as iso_c (since we can see it's value
1308 is equal to one of the named constants), then my_int_2
1309 will be considered C interoperable. */
1310 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1312 sym->ts.is_iso_c |= init->ts.is_iso_c;
1313 sym->ts.is_c_interop |= init->ts.is_c_interop;
1314 /* attr bits needed for module files. */
1315 sym->attr.is_iso_c |= init->ts.is_iso_c;
1316 sym->attr.is_c_interop |= init->ts.is_c_interop;
1317 if (init->ts.is_iso_c)
1318 sym->ts.f90_type = init->ts.f90_type;
1321 /* Add initializer. Make sure we keep the ranks sane. */
1322 if (sym->attr.dimension && init->rank == 0)
1328 if (sym->attr.flavor == FL_PARAMETER
1329 && init->expr_type == EXPR_CONSTANT
1330 && spec_size (sym->as, &size) == SUCCESS
1331 && mpz_cmp_si (size, 0) > 0)
1333 array = gfc_start_constructor (init->ts.type, init->ts.kind,
1336 array->value.constructor = c = NULL;
1337 for (n = 0; n < (int)mpz_get_si (size); n++)
1339 if (array->value.constructor == NULL)
1341 array->value.constructor = c = gfc_get_constructor ();
1346 c->next = gfc_get_constructor ();
1348 c->expr = gfc_copy_expr (init);
1352 array->shape = gfc_get_shape (sym->as->rank);
1353 for (n = 0; n < sym->as->rank; n++)
1354 spec_dimen_size (sym->as, n, &array->shape[n]);
1359 init->rank = sym->as->rank;
1363 if (sym->attr.save == SAVE_NONE)
1364 sym->attr.save = SAVE_IMPLICIT;
1372 /* Function called by variable_decl() that adds a name to a structure
1376 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1377 gfc_array_spec **as)
1381 /* If the current symbol is of the same derived type that we're
1382 constructing, it must have the pointer attribute. */
1383 if (current_ts.type == BT_DERIVED
1384 && current_ts.derived == gfc_current_block ()
1385 && current_attr.pointer == 0)
1387 gfc_error ("Component at %C must have the POINTER attribute");
1391 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1393 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1395 gfc_error ("Array component of structure at %C must have explicit "
1396 "or deferred shape");
1401 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1406 c->attr = current_attr;
1408 c->initializer = *init;
1413 c->attr.dimension = 1;
1416 /* Should this ever get more complicated, combine with similar section
1417 in add_init_expr_to_sym into a separate function. */
1418 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl
1419 && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT)
1423 gcc_assert (c->ts.cl && c->ts.cl->length);
1424 gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT);
1425 gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER);
1427 len = mpz_get_si (c->ts.cl->length->value.integer);
1429 if (c->initializer->expr_type == EXPR_CONSTANT)
1430 gfc_set_constant_character_len (len, c->initializer, -1);
1431 else if (mpz_cmp (c->ts.cl->length->value.integer,
1432 c->initializer->ts.cl->length->value.integer))
1435 gfc_constructor *ctor = c->initializer->value.constructor;
1440 has_ts = (c->initializer->ts.cl
1441 && c->initializer->ts.cl->length_from_typespec);
1443 for (; ctor; ctor = ctor->next)
1445 /* Remember the length of the first element for checking that
1446 all elements *in the constructor* have the same length. This
1447 need not be the length of the LHS! */
1450 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1451 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1452 first_len = ctor->expr->value.character.length;
1456 if (ctor->expr->expr_type == EXPR_CONSTANT)
1457 gfc_set_constant_character_len (len, ctor->expr,
1458 has_ts ? -1 : first_len);
1463 /* Check array components. */
1464 if (!c->attr.dimension)
1466 if (c->attr.allocatable)
1468 gfc_error ("Allocatable component at %C must be an array");
1475 if (c->attr.pointer)
1477 if (c->as->type != AS_DEFERRED)
1479 gfc_error ("Pointer array component of structure at %C must have a "
1484 else if (c->attr.allocatable)
1486 if (c->as->type != AS_DEFERRED)
1488 gfc_error ("Allocatable component of structure at %C must have a "
1495 if (c->as->type != AS_EXPLICIT)
1497 gfc_error ("Array component of structure at %C must have an "
1507 /* Match a 'NULL()', and possibly take care of some side effects. */
1510 gfc_match_null (gfc_expr **result)
1516 m = gfc_match (" null ( )");
1520 /* The NULL symbol now has to be/become an intrinsic function. */
1521 if (gfc_get_symbol ("null", NULL, &sym))
1523 gfc_error ("NULL() initialization at %C is ambiguous");
1527 gfc_intrinsic_symbol (sym);
1529 if (sym->attr.proc != PROC_INTRINSIC
1530 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1531 sym->name, NULL) == FAILURE
1532 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1535 e = gfc_get_expr ();
1536 e->where = gfc_current_locus;
1537 e->expr_type = EXPR_NULL;
1538 e->ts.type = BT_UNKNOWN;
1546 /* Match a variable name with an optional initializer. When this
1547 subroutine is called, a variable is expected to be parsed next.
1548 Depending on what is happening at the moment, updates either the
1549 symbol table or the current interface. */
1552 variable_decl (int elem)
1554 char name[GFC_MAX_SYMBOL_LEN + 1];
1555 gfc_expr *initializer, *char_len;
1557 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1568 old_locus = gfc_current_locus;
1570 /* When we get here, we've just matched a list of attributes and
1571 maybe a type and a double colon. The next thing we expect to see
1572 is the name of the symbol. */
1573 m = gfc_match_name (name);
1577 var_locus = gfc_current_locus;
1579 /* Now we could see the optional array spec. or character length. */
1580 m = gfc_match_array_spec (&as);
1581 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1582 cp_as = gfc_copy_array_spec (as);
1583 else if (m == MATCH_ERROR)
1587 as = gfc_copy_array_spec (current_as);
1592 if (current_ts.type == BT_CHARACTER)
1594 switch (match_char_length (&char_len))
1597 cl = gfc_get_charlen ();
1598 cl->next = gfc_current_ns->cl_list;
1599 gfc_current_ns->cl_list = cl;
1601 cl->length = char_len;
1604 /* Non-constant lengths need to be copied after the first
1605 element. Also copy assumed lengths. */
1608 && (current_ts.cl->length == NULL
1609 || current_ts.cl->length->expr_type != EXPR_CONSTANT))
1611 cl = gfc_get_charlen ();
1612 cl->next = gfc_current_ns->cl_list;
1613 gfc_current_ns->cl_list = cl;
1614 cl->length = gfc_copy_expr (current_ts.cl->length);
1626 /* If this symbol has already shown up in a Cray Pointer declaration,
1627 then we want to set the type & bail out. */
1628 if (gfc_option.flag_cray_pointer)
1630 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1631 if (sym != NULL && sym->attr.cray_pointee)
1633 sym->ts.type = current_ts.type;
1634 sym->ts.kind = current_ts.kind;
1636 sym->ts.derived = current_ts.derived;
1637 sym->ts.is_c_interop = current_ts.is_c_interop;
1638 sym->ts.is_iso_c = current_ts.is_iso_c;
1641 /* Check to see if we have an array specification. */
1644 if (sym->as != NULL)
1646 gfc_error ("Duplicate array spec for Cray pointee at %C");
1647 gfc_free_array_spec (cp_as);
1653 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1654 gfc_internal_error ("Couldn't set pointee array spec.");
1656 /* Fix the array spec. */
1657 m = gfc_mod_pointee_as (sym->as);
1658 if (m == MATCH_ERROR)
1666 gfc_free_array_spec (cp_as);
1671 /* OK, we've successfully matched the declaration. Now put the
1672 symbol in the current namespace, because it might be used in the
1673 optional initialization expression for this symbol, e.g. this is
1676 integer, parameter :: i = huge(i)
1678 This is only true for parameters or variables of a basic type.
1679 For components of derived types, it is not true, so we don't
1680 create a symbol for those yet. If we fail to create the symbol,
1682 if (gfc_current_state () != COMP_DERIVED
1683 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1689 /* An interface body specifies all of the procedure's
1690 characteristics and these shall be consistent with those
1691 specified in the procedure definition, except that the interface
1692 may specify a procedure that is not pure if the procedure is
1693 defined to be pure(12.3.2). */
1694 if (current_ts.type == BT_DERIVED
1695 && gfc_current_ns->proc_name
1696 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1697 && current_ts.derived->ns != gfc_current_ns)
1700 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name);
1701 if (!(current_ts.derived->attr.imported
1703 && st->n.sym == current_ts.derived)
1704 && !gfc_current_ns->has_import_set)
1706 gfc_error ("the type of '%s' at %C has not been declared within the "
1713 /* In functions that have a RESULT variable defined, the function
1714 name always refers to function calls. Therefore, the name is
1715 not allowed to appear in specification statements. */
1716 if (gfc_current_state () == COMP_FUNCTION
1717 && gfc_current_block () != NULL
1718 && gfc_current_block ()->result != NULL
1719 && gfc_current_block ()->result != gfc_current_block ()
1720 && strcmp (gfc_current_block ()->name, name) == 0)
1722 gfc_error ("Function name '%s' not allowed at %C", name);
1727 /* We allow old-style initializations of the form
1728 integer i /2/, j(4) /3*3, 1/
1729 (if no colon has been seen). These are different from data
1730 statements in that initializers are only allowed to apply to the
1731 variable immediately preceding, i.e.
1733 is not allowed. Therefore we have to do some work manually, that
1734 could otherwise be left to the matchers for DATA statements. */
1736 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1738 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1739 "initialization at %C") == FAILURE)
1742 return match_old_style_init (name);
1745 /* The double colon must be present in order to have initializers.
1746 Otherwise the statement is ambiguous with an assignment statement. */
1749 if (gfc_match (" =>") == MATCH_YES)
1751 if (!current_attr.pointer)
1753 gfc_error ("Initialization at %C isn't for a pointer variable");
1758 m = gfc_match_null (&initializer);
1761 gfc_error ("Pointer initialization requires a NULL() at %C");
1765 if (gfc_pure (NULL))
1767 gfc_error ("Initialization of pointer at %C is not allowed in "
1768 "a PURE procedure");
1776 else if (gfc_match_char ('=') == MATCH_YES)
1778 if (current_attr.pointer)
1780 gfc_error ("Pointer initialization at %C requires '=>', "
1786 m = gfc_match_init_expr (&initializer);
1789 gfc_error ("Expected an initialization expression at %C");
1793 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL))
1795 gfc_error ("Initialization of variable at %C is not allowed in "
1796 "a PURE procedure");
1805 if (initializer != NULL && current_attr.allocatable
1806 && gfc_current_state () == COMP_DERIVED)
1808 gfc_error ("Initialization of allocatable component at %C is not "
1814 /* Add the initializer. Note that it is fine if initializer is
1815 NULL here, because we sometimes also need to check if a
1816 declaration *must* have an initialization expression. */
1817 if (gfc_current_state () != COMP_DERIVED)
1818 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1821 if (current_ts.type == BT_DERIVED
1822 && !current_attr.pointer && !initializer)
1823 initializer = gfc_default_initializer (¤t_ts);
1824 t = build_struct (name, cl, &initializer, &as);
1827 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1830 /* Free stuff up and return. */
1831 gfc_free_expr (initializer);
1832 gfc_free_array_spec (as);
1838 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1839 This assumes that the byte size is equal to the kind number for
1840 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1843 gfc_match_old_kind_spec (gfc_typespec *ts)
1848 if (gfc_match_char ('*') != MATCH_YES)
1851 m = gfc_match_small_literal_int (&ts->kind, NULL);
1855 original_kind = ts->kind;
1857 /* Massage the kind numbers for complex types. */
1858 if (ts->type == BT_COMPLEX)
1862 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1863 gfc_basic_typename (ts->type), original_kind);
1869 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1871 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1872 gfc_basic_typename (ts->type), original_kind);
1876 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1877 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1884 /* Match a kind specification. Since kinds are generally optional, we
1885 usually return MATCH_NO if something goes wrong. If a "kind="
1886 string is found, then we know we have an error. */
1889 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1901 where = loc = gfc_current_locus;
1906 if (gfc_match_char ('(') == MATCH_NO)
1909 /* Also gobbles optional text. */
1910 if (gfc_match (" kind = ") == MATCH_YES)
1913 loc = gfc_current_locus;
1916 n = gfc_match_init_expr (&e);
1920 if (gfc_matching_function)
1922 /* The function kind expression might include use associated or
1923 imported parameters and try again after the specification
1925 if (gfc_match_char (')') != MATCH_YES)
1927 gfc_error ("Missing right parenthesis at %C");
1933 gfc_undo_symbols ();
1938 /* ....or else, the match is real. */
1940 gfc_error ("Expected initialization expression at %C");
1948 gfc_error ("Expected scalar initialization expression at %C");
1953 msg = gfc_extract_int (e, &ts->kind);
1962 /* Before throwing away the expression, let's see if we had a
1963 C interoperable kind (and store the fact). */
1964 if (e->ts.is_c_interop == 1)
1966 /* Mark this as c interoperable if being declared with one
1967 of the named constants from iso_c_binding. */
1968 ts->is_c_interop = e->ts.is_iso_c;
1969 ts->f90_type = e->ts.f90_type;
1975 /* Ignore errors to this point, if we've gotten here. This means
1976 we ignore the m=MATCH_ERROR from above. */
1977 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1979 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
1980 gfc_basic_typename (ts->type));
1981 gfc_current_locus = where;
1985 /* Warn if, e.g., c_int is used for a REAL variable, but not
1986 if, e.g., c_double is used for COMPLEX as the standard
1987 explicitly says that the kind type parameter for complex and real
1988 variable is the same, i.e. c_float == c_float_complex. */
1989 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
1990 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
1991 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
1992 gfc_error_now ("C kind type parameter is for type %s but type at %L "
1993 "is %s", gfc_basic_typename (ts->f90_type), &where,
1994 gfc_basic_typename (ts->type));
1996 gfc_gobble_whitespace ();
1997 if ((c = gfc_next_ascii_char ()) != ')'
1998 && (ts->type != BT_CHARACTER || c != ','))
2000 if (ts->type == BT_CHARACTER)
2001 gfc_error ("Missing right parenthesis or comma at %C");
2003 gfc_error ("Missing right parenthesis at %C");
2007 /* All tests passed. */
2010 if(m == MATCH_ERROR)
2011 gfc_current_locus = where;
2013 /* Return what we know from the test(s). */
2018 gfc_current_locus = where;
2024 match_char_kind (int * kind, int * is_iso_c)
2033 where = gfc_current_locus;
2035 n = gfc_match_init_expr (&e);
2037 if (n != MATCH_YES && gfc_matching_function)
2039 /* The expression might include use-associated or imported
2040 parameters and try again after the specification
2043 gfc_undo_symbols ();
2048 gfc_error ("Expected initialization expression at %C");
2054 gfc_error ("Expected scalar initialization expression at %C");
2059 msg = gfc_extract_int (e, kind);
2060 *is_iso_c = e->ts.is_iso_c;
2070 /* Ignore errors to this point, if we've gotten here. This means
2071 we ignore the m=MATCH_ERROR from above. */
2072 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2074 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2078 /* All tests passed. */
2081 if (m == MATCH_ERROR)
2082 gfc_current_locus = where;
2084 /* Return what we know from the test(s). */
2089 gfc_current_locus = where;
2093 /* Match the various kind/length specifications in a CHARACTER
2094 declaration. We don't return MATCH_NO. */
2097 match_char_spec (gfc_typespec *ts)
2099 int kind, seen_length, is_iso_c;
2109 /* Try the old-style specification first. */
2110 old_char_selector = 0;
2112 m = match_char_length (&len);
2116 old_char_selector = 1;
2121 m = gfc_match_char ('(');
2124 m = MATCH_YES; /* Character without length is a single char. */
2128 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2129 if (gfc_match (" kind =") == MATCH_YES)
2131 m = match_char_kind (&kind, &is_iso_c);
2133 if (m == MATCH_ERROR)
2138 if (gfc_match (" , len =") == MATCH_NO)
2141 m = char_len_param_value (&len);
2144 if (m == MATCH_ERROR)
2151 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2152 if (gfc_match (" len =") == MATCH_YES)
2154 m = char_len_param_value (&len);
2157 if (m == MATCH_ERROR)
2161 if (gfc_match_char (')') == MATCH_YES)
2164 if (gfc_match (" , kind =") != MATCH_YES)
2167 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2173 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2174 m = char_len_param_value (&len);
2177 if (m == MATCH_ERROR)
2181 m = gfc_match_char (')');
2185 if (gfc_match_char (',') != MATCH_YES)
2188 gfc_match (" kind ="); /* Gobble optional text. */
2190 m = match_char_kind (&kind, &is_iso_c);
2191 if (m == MATCH_ERROR)
2197 /* Require a right-paren at this point. */
2198 m = gfc_match_char (')');
2203 gfc_error ("Syntax error in CHARACTER declaration at %C");
2205 gfc_free_expr (len);
2209 /* Deal with character functions after USE and IMPORT statements. */
2210 if (gfc_matching_function)
2212 gfc_free_expr (len);
2213 gfc_undo_symbols ();
2219 gfc_free_expr (len);
2223 /* Do some final massaging of the length values. */
2224 cl = gfc_get_charlen ();
2225 cl->next = gfc_current_ns->cl_list;
2226 gfc_current_ns->cl_list = cl;
2228 if (seen_length == 0)
2229 cl->length = gfc_int_expr (1);
2234 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2236 /* We have to know if it was a c interoperable kind so we can
2237 do accurate type checking of bind(c) procs, etc. */
2239 /* Mark this as c interoperable if being declared with one
2240 of the named constants from iso_c_binding. */
2241 ts->is_c_interop = is_iso_c;
2242 else if (len != NULL)
2243 /* Here, we might have parsed something such as: character(c_char)
2244 In this case, the parsing code above grabs the c_char when
2245 looking for the length (line 1690, roughly). it's the last
2246 testcase for parsing the kind params of a character variable.
2247 However, it's not actually the length. this seems like it
2249 To see if the user used a C interop kind, test the expr
2250 of the so called length, and see if it's C interoperable. */
2251 ts->is_c_interop = len->ts.is_iso_c;
2257 /* Matches a type specification. If successful, sets the ts structure
2258 to the matched specification. This is necessary for FUNCTION and
2259 IMPLICIT statements.
2261 If implicit_flag is nonzero, then we don't check for the optional
2262 kind specification. Not doing so is needed for matching an IMPLICIT
2263 statement correctly. */
2266 gfc_match_type_spec (gfc_typespec *ts, int implicit_flag)
2268 char name[GFC_MAX_SYMBOL_LEN + 1];
2272 bool seen_deferred_kind;
2274 /* A belt and braces check that the typespec is correctly being treated
2275 as a deferred characteristic association. */
2276 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2277 && (gfc_current_block ()->result->ts.kind == -1)
2278 && (ts->kind == -1);
2280 if (seen_deferred_kind)
2283 /* Clear the current binding label, in case one is given. */
2284 curr_binding_label[0] = '\0';
2286 if (gfc_match (" byte") == MATCH_YES)
2288 if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C")
2292 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2294 gfc_error ("BYTE type used at %C "
2295 "is not available on the target machine");
2299 ts->type = BT_INTEGER;
2304 if (gfc_match (" integer") == MATCH_YES)
2306 ts->type = BT_INTEGER;
2307 ts->kind = gfc_default_integer_kind;
2311 if (gfc_match (" character") == MATCH_YES)
2313 ts->type = BT_CHARACTER;
2314 if (implicit_flag == 0)
2315 return match_char_spec (ts);
2320 if (gfc_match (" real") == MATCH_YES)
2323 ts->kind = gfc_default_real_kind;
2327 if (gfc_match (" double precision") == MATCH_YES)
2330 ts->kind = gfc_default_double_kind;
2334 if (gfc_match (" complex") == MATCH_YES)
2336 ts->type = BT_COMPLEX;
2337 ts->kind = gfc_default_complex_kind;
2341 if (gfc_match (" double complex") == MATCH_YES)
2343 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2344 "conform to the Fortran 95 standard") == FAILURE)
2347 ts->type = BT_COMPLEX;
2348 ts->kind = gfc_default_double_kind;
2352 if (gfc_match (" logical") == MATCH_YES)
2354 ts->type = BT_LOGICAL;
2355 ts->kind = gfc_default_logical_kind;
2359 m = gfc_match (" type ( %n )", name);
2363 ts->type = BT_DERIVED;
2365 /* Defer association of the derived type until the end of the
2366 specification block. However, if the derived type can be
2367 found, add it to the typespec. */
2368 if (gfc_matching_function)
2371 if (gfc_current_state () != COMP_INTERFACE
2372 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2377 /* Search for the name but allow the components to be defined later. If
2378 type = -1, this typespec has been seen in a function declaration but
2379 the type could not be accessed at that point. */
2381 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2383 gfc_error ("Type name '%s' at %C is ambiguous", name);
2386 else if (ts->kind == -1)
2388 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2389 || gfc_current_ns->has_import_set;
2390 if (gfc_find_symbol (name, NULL, iface, &sym))
2392 gfc_error ("Type name '%s' at %C is ambiguous", name);
2401 if (sym->attr.flavor != FL_DERIVED
2402 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2405 gfc_set_sym_referenced (sym);
2411 /* For all types except double, derived and character, look for an
2412 optional kind specifier. MATCH_NO is actually OK at this point. */
2413 if (implicit_flag == 1)
2416 if (gfc_current_form == FORM_FREE)
2418 c = gfc_peek_ascii_char();
2419 if (!gfc_is_whitespace(c) && c != '*' && c != '('
2420 && c != ':' && c != ',')
2424 m = gfc_match_kind_spec (ts, false);
2425 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2426 m = gfc_match_old_kind_spec (ts);
2428 /* Defer association of the KIND expression of function results
2429 until after USE and IMPORT statements. */
2430 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2431 || gfc_matching_function)
2435 m = MATCH_YES; /* No kind specifier found. */
2441 /* Match an IMPLICIT NONE statement. Actually, this statement is
2442 already matched in parse.c, or we would not end up here in the
2443 first place. So the only thing we need to check, is if there is
2444 trailing garbage. If not, the match is successful. */
2447 gfc_match_implicit_none (void)
2449 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2453 /* Match the letter range(s) of an IMPLICIT statement. */
2456 match_implicit_range (void)
2462 cur_loc = gfc_current_locus;
2464 gfc_gobble_whitespace ();
2465 c = gfc_next_ascii_char ();
2468 gfc_error ("Missing character range in IMPLICIT at %C");
2475 gfc_gobble_whitespace ();
2476 c1 = gfc_next_ascii_char ();
2480 gfc_gobble_whitespace ();
2481 c = gfc_next_ascii_char ();
2486 inner = 0; /* Fall through. */
2493 gfc_gobble_whitespace ();
2494 c2 = gfc_next_ascii_char ();
2498 gfc_gobble_whitespace ();
2499 c = gfc_next_ascii_char ();
2501 if ((c != ',') && (c != ')'))
2514 gfc_error ("Letters must be in alphabetic order in "
2515 "IMPLICIT statement at %C");
2519 /* See if we can add the newly matched range to the pending
2520 implicits from this IMPLICIT statement. We do not check for
2521 conflicts with whatever earlier IMPLICIT statements may have
2522 set. This is done when we've successfully finished matching
2524 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2531 gfc_syntax_error (ST_IMPLICIT);
2533 gfc_current_locus = cur_loc;
2538 /* Match an IMPLICIT statement, storing the types for
2539 gfc_set_implicit() if the statement is accepted by the parser.
2540 There is a strange looking, but legal syntactic construction
2541 possible. It looks like:
2543 IMPLICIT INTEGER (a-b) (c-d)
2545 This is legal if "a-b" is a constant expression that happens to
2546 equal one of the legal kinds for integers. The real problem
2547 happens with an implicit specification that looks like:
2549 IMPLICIT INTEGER (a-b)
2551 In this case, a typespec matcher that is "greedy" (as most of the
2552 matchers are) gobbles the character range as a kindspec, leaving
2553 nothing left. We therefore have to go a bit more slowly in the
2554 matching process by inhibiting the kindspec checking during
2555 typespec matching and checking for a kind later. */
2558 gfc_match_implicit (void)
2567 /* We don't allow empty implicit statements. */
2568 if (gfc_match_eos () == MATCH_YES)
2570 gfc_error ("Empty IMPLICIT statement at %C");
2576 /* First cleanup. */
2577 gfc_clear_new_implicit ();
2579 /* A basic type is mandatory here. */
2580 m = gfc_match_type_spec (&ts, 1);
2581 if (m == MATCH_ERROR)
2586 cur_loc = gfc_current_locus;
2587 m = match_implicit_range ();
2591 /* We may have <TYPE> (<RANGE>). */
2592 gfc_gobble_whitespace ();
2593 c = gfc_next_ascii_char ();
2594 if ((c == '\n') || (c == ','))
2596 /* Check for CHARACTER with no length parameter. */
2597 if (ts.type == BT_CHARACTER && !ts.cl)
2599 ts.kind = gfc_default_character_kind;
2600 ts.cl = gfc_get_charlen ();
2601 ts.cl->next = gfc_current_ns->cl_list;
2602 gfc_current_ns->cl_list = ts.cl;
2603 ts.cl->length = gfc_int_expr (1);
2606 /* Record the Successful match. */
2607 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2612 gfc_current_locus = cur_loc;
2615 /* Discard the (incorrectly) matched range. */
2616 gfc_clear_new_implicit ();
2618 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2619 if (ts.type == BT_CHARACTER)
2620 m = match_char_spec (&ts);
2623 m = gfc_match_kind_spec (&ts, false);
2626 m = gfc_match_old_kind_spec (&ts);
2627 if (m == MATCH_ERROR)
2633 if (m == MATCH_ERROR)
2636 m = match_implicit_range ();
2637 if (m == MATCH_ERROR)
2642 gfc_gobble_whitespace ();
2643 c = gfc_next_ascii_char ();
2644 if ((c != '\n') && (c != ','))
2647 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2655 gfc_syntax_error (ST_IMPLICIT);
2663 gfc_match_import (void)
2665 char name[GFC_MAX_SYMBOL_LEN + 1];
2670 if (gfc_current_ns->proc_name == NULL
2671 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2673 gfc_error ("IMPORT statement at %C only permitted in "
2674 "an INTERFACE body");
2678 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2682 if (gfc_match_eos () == MATCH_YES)
2684 /* All host variables should be imported. */
2685 gfc_current_ns->has_import_set = 1;
2689 if (gfc_match (" ::") == MATCH_YES)
2691 if (gfc_match_eos () == MATCH_YES)
2693 gfc_error ("Expecting list of named entities at %C");
2700 m = gfc_match (" %n", name);
2704 if (gfc_current_ns->parent != NULL
2705 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2707 gfc_error ("Type name '%s' at %C is ambiguous", name);
2710 else if (gfc_current_ns->proc_name->ns->parent != NULL
2711 && gfc_find_symbol (name,
2712 gfc_current_ns->proc_name->ns->parent,
2715 gfc_error ("Type name '%s' at %C is ambiguous", name);
2721 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2722 "at %C - does not exist.", name);
2726 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2728 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2733 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
2736 sym->attr.imported = 1;
2748 if (gfc_match_eos () == MATCH_YES)
2750 if (gfc_match_char (',') != MATCH_YES)
2757 gfc_error ("Syntax error in IMPORT statement at %C");
2762 /* A minimal implementation of gfc_match without whitespace, escape
2763 characters or variable arguments. Returns true if the next
2764 characters match the TARGET template exactly. */
2767 match_string_p (const char *target)
2771 for (p = target; *p; p++)
2772 if ((char) gfc_next_ascii_char () != *p)
2777 /* Matches an attribute specification including array specs. If
2778 successful, leaves the variables current_attr and current_as
2779 holding the specification. Also sets the colon_seen variable for
2780 later use by matchers associated with initializations.
2782 This subroutine is a little tricky in the sense that we don't know
2783 if we really have an attr-spec until we hit the double colon.
2784 Until that time, we can only return MATCH_NO. This forces us to
2785 check for duplicate specification at this level. */
2788 match_attr_spec (void)
2790 /* Modifiers that can exist in a type statement. */
2792 { GFC_DECL_BEGIN = 0,
2793 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2794 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2795 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2796 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2797 DECL_IS_BIND_C, DECL_NONE,
2798 GFC_DECL_END /* Sentinel */
2802 /* GFC_DECL_END is the sentinel, index starts at 0. */
2803 #define NUM_DECL GFC_DECL_END
2805 locus start, seen_at[NUM_DECL];
2812 gfc_clear_attr (¤t_attr);
2813 start = gfc_current_locus;
2818 /* See if we get all of the keywords up to the final double colon. */
2819 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2827 gfc_gobble_whitespace ();
2829 ch = gfc_next_ascii_char ();
2832 /* This is the successful exit condition for the loop. */
2833 if (gfc_next_ascii_char () == ':')
2838 gfc_gobble_whitespace ();
2839 switch (gfc_peek_ascii_char ())
2842 if (match_string_p ("allocatable"))
2843 d = DECL_ALLOCATABLE;
2847 /* Try and match the bind(c). */
2848 m = gfc_match_bind_c (NULL, true);
2851 else if (m == MATCH_ERROR)
2856 if (match_string_p ("dimension"))
2861 if (match_string_p ("external"))
2866 if (match_string_p ("int"))
2868 ch = gfc_next_ascii_char ();
2871 if (match_string_p ("nt"))
2873 /* Matched "intent". */
2874 /* TODO: Call match_intent_spec from here. */
2875 if (gfc_match (" ( in out )") == MATCH_YES)
2877 else if (gfc_match (" ( in )") == MATCH_YES)
2879 else if (gfc_match (" ( out )") == MATCH_YES)
2885 if (match_string_p ("insic"))
2887 /* Matched "intrinsic". */
2895 if (match_string_p ("optional"))
2900 gfc_next_ascii_char ();
2901 switch (gfc_next_ascii_char ())
2904 if (match_string_p ("rameter"))
2906 /* Matched "parameter". */
2912 if (match_string_p ("inter"))
2914 /* Matched "pointer". */
2920 ch = gfc_next_ascii_char ();
2923 if (match_string_p ("vate"))
2925 /* Matched "private". */
2931 if (match_string_p ("tected"))
2933 /* Matched "protected". */
2940 if (match_string_p ("blic"))
2942 /* Matched "public". */
2950 if (match_string_p ("save"))
2955 if (match_string_p ("target"))
2960 gfc_next_ascii_char ();
2961 ch = gfc_next_ascii_char ();
2964 if (match_string_p ("lue"))
2966 /* Matched "value". */
2972 if (match_string_p ("latile"))
2974 /* Matched "volatile". */
2982 /* No double colon and no recognizable decl_type, so assume that
2983 we've been looking at something else the whole time. */
2990 /* Check to make sure any parens are paired up correctly. */
2991 if (gfc_match_parens () == MATCH_ERROR)
2998 seen_at[d] = gfc_current_locus;
3000 if (d == DECL_DIMENSION)
3002 m = gfc_match_array_spec (¤t_as);
3006 gfc_error ("Missing dimension specification at %C");
3010 if (m == MATCH_ERROR)
3015 /* Since we've seen a double colon, we have to be looking at an
3016 attr-spec. This means that we can now issue errors. */
3017 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3022 case DECL_ALLOCATABLE:
3023 attr = "ALLOCATABLE";
3025 case DECL_DIMENSION:
3032 attr = "INTENT (IN)";
3035 attr = "INTENT (OUT)";
3038 attr = "INTENT (IN OUT)";
3040 case DECL_INTRINSIC:
3046 case DECL_PARAMETER:
3052 case DECL_PROTECTED:
3067 case DECL_IS_BIND_C:
3077 attr = NULL; /* This shouldn't happen. */
3080 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3085 /* Now that we've dealt with duplicate attributes, add the attributes
3086 to the current attribute. */
3087 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3092 if (gfc_current_state () == COMP_DERIVED
3093 && d != DECL_DIMENSION && d != DECL_POINTER
3094 && d != DECL_PRIVATE && d != DECL_PUBLIC
3097 if (d == DECL_ALLOCATABLE)
3099 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3100 "attribute at %C in a TYPE definition")
3109 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3116 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3117 && gfc_current_state () != COMP_MODULE)
3119 if (d == DECL_PRIVATE)
3123 if (gfc_current_state () == COMP_DERIVED
3124 && gfc_state_stack->previous
3125 && gfc_state_stack->previous->state == COMP_MODULE)
3127 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3128 "at %L in a TYPE definition", attr,
3138 gfc_error ("%s attribute at %L is not allowed outside of the "
3139 "specification part of a module", attr, &seen_at[d]);
3147 case DECL_ALLOCATABLE:
3148 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3151 case DECL_DIMENSION:
3152 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3156 t = gfc_add_external (¤t_attr, &seen_at[d]);
3160 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3164 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3168 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3171 case DECL_INTRINSIC:
3172 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3176 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3179 case DECL_PARAMETER:
3180 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3184 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3187 case DECL_PROTECTED:
3188 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3190 gfc_error ("PROTECTED at %C only allowed in specification "
3191 "part of a module");
3196 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3201 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3205 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3210 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3215 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3219 t = gfc_add_target (¤t_attr, &seen_at[d]);
3222 case DECL_IS_BIND_C:
3223 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3227 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3232 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3236 if (gfc_notify_std (GFC_STD_F2003,
3237 "Fortran 2003: VOLATILE attribute at %C")
3241 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3245 gfc_internal_error ("match_attr_spec(): Bad attribute");
3259 gfc_current_locus = start;
3260 gfc_free_array_spec (current_as);
3266 /* Set the binding label, dest_label, either with the binding label
3267 stored in the given gfc_typespec, ts, or if none was provided, it
3268 will be the symbol name in all lower case, as required by the draft
3269 (J3/04-007, section 15.4.1). If a binding label was given and
3270 there is more than one argument (num_idents), it is an error. */
3273 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3275 if (num_idents > 1 && has_name_equals)
3277 gfc_error ("Multiple identifiers provided with "
3278 "single NAME= specifier at %C");
3282 if (curr_binding_label[0] != '\0')
3284 /* Binding label given; store in temp holder til have sym. */
3285 strcpy (dest_label, curr_binding_label);
3289 /* No binding label given, and the NAME= specifier did not exist,
3290 which means there was no NAME="". */
3291 if (sym_name != NULL && has_name_equals == 0)
3292 strcpy (dest_label, sym_name);
3299 /* Set the status of the given common block as being BIND(C) or not,
3300 depending on the given parameter, is_bind_c. */
3303 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3305 com_block->is_bind_c = is_bind_c;
3310 /* Verify that the given gfc_typespec is for a C interoperable type. */
3313 verify_c_interop (gfc_typespec *ts)
3315 if (ts->type == BT_DERIVED && ts->derived != NULL)
3316 return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE);
3317 else if (ts->is_c_interop != 1)
3324 /* Verify that the variables of a given common block, which has been
3325 defined with the attribute specifier bind(c), to be of a C
3326 interoperable type. Errors will be reported here, if
3330 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3332 gfc_symbol *curr_sym = NULL;
3333 gfc_try retval = SUCCESS;
3335 curr_sym = com_block->head;
3337 /* Make sure we have at least one symbol. */
3338 if (curr_sym == NULL)
3341 /* Here we know we have a symbol, so we'll execute this loop
3345 /* The second to last param, 1, says this is in a common block. */
3346 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3347 curr_sym = curr_sym->common_next;
3348 } while (curr_sym != NULL);
3354 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3355 an appropriate error message is reported. */
3358 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3359 int is_in_common, gfc_common_head *com_block)
3361 bool bind_c_function = false;
3362 gfc_try retval = SUCCESS;
3364 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3365 bind_c_function = true;
3367 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3369 tmp_sym = tmp_sym->result;
3370 /* Make sure it wasn't an implicitly typed result. */
3371 if (tmp_sym->attr.implicit_type)
3373 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3374 "%L may not be C interoperable", tmp_sym->name,
3375 &tmp_sym->declared_at);
3376 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3377 /* Mark it as C interoperable to prevent duplicate warnings. */
3378 tmp_sym->ts.is_c_interop = 1;
3379 tmp_sym->attr.is_c_interop = 1;
3383 /* Here, we know we have the bind(c) attribute, so if we have
3384 enough type info, then verify that it's a C interop kind.
3385 The info could be in the symbol already, or possibly still in
3386 the given ts (current_ts), so look in both. */
3387 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3389 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3391 /* See if we're dealing with a sym in a common block or not. */
3392 if (is_in_common == 1)
3394 gfc_warning ("Variable '%s' in common block '%s' at %L "
3395 "may not be a C interoperable "
3396 "kind though common block '%s' is BIND(C)",
3397 tmp_sym->name, com_block->name,
3398 &(tmp_sym->declared_at), com_block->name);
3402 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3403 gfc_error ("Type declaration '%s' at %L is not C "
3404 "interoperable but it is BIND(C)",
3405 tmp_sym->name, &(tmp_sym->declared_at));
3407 gfc_warning ("Variable '%s' at %L "
3408 "may not be a C interoperable "
3409 "kind but it is bind(c)",
3410 tmp_sym->name, &(tmp_sym->declared_at));
3414 /* Variables declared w/in a common block can't be bind(c)
3415 since there's no way for C to see these variables, so there's
3416 semantically no reason for the attribute. */
3417 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3419 gfc_error ("Variable '%s' in common block '%s' at "
3420 "%L cannot be declared with BIND(C) "
3421 "since it is not a global",
3422 tmp_sym->name, com_block->name,
3423 &(tmp_sym->declared_at));
3427 /* Scalar variables that are bind(c) can not have the pointer
3428 or allocatable attributes. */
3429 if (tmp_sym->attr.is_bind_c == 1)
3431 if (tmp_sym->attr.pointer == 1)
3433 gfc_error ("Variable '%s' at %L cannot have both the "
3434 "POINTER and BIND(C) attributes",
3435 tmp_sym->name, &(tmp_sym->declared_at));
3439 if (tmp_sym->attr.allocatable == 1)
3441 gfc_error ("Variable '%s' at %L cannot have both the "
3442 "ALLOCATABLE and BIND(C) attributes",
3443 tmp_sym->name, &(tmp_sym->declared_at));
3449 /* If it is a BIND(C) function, make sure the return value is a
3450 scalar value. The previous tests in this function made sure
3451 the type is interoperable. */
3452 if (bind_c_function && tmp_sym->as != NULL)
3453 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3454 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3456 /* BIND(C) functions can not return a character string. */
3457 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3458 if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL
3459 || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT
3460 || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0)
3461 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3462 "be a character string", tmp_sym->name,
3463 &(tmp_sym->declared_at));
3466 /* See if the symbol has been marked as private. If it has, make sure
3467 there is no binding label and warn the user if there is one. */
3468 if (tmp_sym->attr.access == ACCESS_PRIVATE
3469 && tmp_sym->binding_label[0] != '\0')
3470 /* Use gfc_warning_now because we won't say that the symbol fails
3471 just because of this. */
3472 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3473 "given the binding label '%s'", tmp_sym->name,
3474 &(tmp_sym->declared_at), tmp_sym->binding_label);
3480 /* Set the appropriate fields for a symbol that's been declared as
3481 BIND(C) (the is_bind_c flag and the binding label), and verify that
3482 the type is C interoperable. Errors are reported by the functions
3483 used to set/test these fields. */
3486 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3488 gfc_try retval = SUCCESS;
3490 /* TODO: Do we need to make sure the vars aren't marked private? */
3492 /* Set the is_bind_c bit in symbol_attribute. */
3493 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3495 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3496 num_idents) != SUCCESS)
3503 /* Set the fields marking the given common block as BIND(C), including
3504 a binding label, and report any errors encountered. */
3507 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3509 gfc_try retval = SUCCESS;
3511 /* destLabel, common name, typespec (which may have binding label). */
3512 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3516 /* Set the given common block (com_block) to being bind(c) (1). */
3517 set_com_block_bind_c (com_block, 1);
3523 /* Retrieve the list of one or more identifiers that the given bind(c)
3524 attribute applies to. */
3527 get_bind_c_idents (void)
3529 char name[GFC_MAX_SYMBOL_LEN + 1];
3531 gfc_symbol *tmp_sym = NULL;
3533 gfc_common_head *com_block = NULL;
3535 if (gfc_match_name (name) == MATCH_YES)
3537 found_id = MATCH_YES;
3538 gfc_get_ha_symbol (name, &tmp_sym);
3540 else if (match_common_name (name) == MATCH_YES)
3542 found_id = MATCH_YES;
3543 com_block = gfc_get_common (name, 0);
3547 gfc_error ("Need either entity or common block name for "
3548 "attribute specification statement at %C");
3552 /* Save the current identifier and look for more. */
3555 /* Increment the number of identifiers found for this spec stmt. */
3558 /* Make sure we have a sym or com block, and verify that it can
3559 be bind(c). Set the appropriate field(s) and look for more
3561 if (tmp_sym != NULL || com_block != NULL)
3563 if (tmp_sym != NULL)
3565 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3571 if (set_verify_bind_c_com_block(com_block, num_idents)
3576 /* Look to see if we have another identifier. */
3578 if (gfc_match_eos () == MATCH_YES)
3579 found_id = MATCH_NO;
3580 else if (gfc_match_char (',') != MATCH_YES)
3581 found_id = MATCH_NO;
3582 else if (gfc_match_name (name) == MATCH_YES)
3584 found_id = MATCH_YES;
3585 gfc_get_ha_symbol (name, &tmp_sym);
3587 else if (match_common_name (name) == MATCH_YES)
3589 found_id = MATCH_YES;
3590 com_block = gfc_get_common (name, 0);
3594 gfc_error ("Missing entity or common block name for "
3595 "attribute specification statement at %C");
3601 gfc_internal_error ("Missing symbol");
3603 } while (found_id == MATCH_YES);
3605 /* if we get here we were successful */
3610 /* Try and match a BIND(C) attribute specification statement. */
3613 gfc_match_bind_c_stmt (void)
3615 match found_match = MATCH_NO;
3620 /* This may not be necessary. */
3622 /* Clear the temporary binding label holder. */
3623 curr_binding_label[0] = '\0';
3625 /* Look for the bind(c). */
3626 found_match = gfc_match_bind_c (NULL, true);
3628 if (found_match == MATCH_YES)
3630 /* Look for the :: now, but it is not required. */
3633 /* Get the identifier(s) that needs to be updated. This may need to
3634 change to hand the flag(s) for the attr specified so all identifiers
3635 found can have all appropriate parts updated (assuming that the same
3636 spec stmt can have multiple attrs, such as both bind(c) and
3638 if (get_bind_c_idents () != SUCCESS)
3639 /* Error message should have printed already. */
3647 /* Match a data declaration statement. */
3650 gfc_match_data_decl (void)
3656 num_idents_on_line = 0;
3658 m = gfc_match_type_spec (¤t_ts, 0);
3662 if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED)
3664 sym = gfc_use_derived (current_ts.derived);
3672 current_ts.derived = sym;
3675 m = match_attr_spec ();
3676 if (m == MATCH_ERROR)
3682 if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL
3683 && !current_ts.derived->attr.zero_comp)
3686 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3689 gfc_find_symbol (current_ts.derived->name,
3690 current_ts.derived->ns->parent, 1, &sym);
3692 /* Any symbol that we find had better be a type definition
3693 which has its components defined. */
3694 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3695 && (current_ts.derived->components != NULL
3696 || current_ts.derived->attr.zero_comp))
3699 /* Now we have an error, which we signal, and then fix up
3700 because the knock-on is plain and simple confusing. */
3701 gfc_error_now ("Derived type at %C has not been previously defined "
3702 "and so cannot appear in a derived type definition");
3703 current_attr.pointer = 1;
3708 /* If we have an old-style character declaration, and no new-style
3709 attribute specifications, then there a comma is optional between
3710 the type specification and the variable list. */
3711 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3712 gfc_match_char (',');
3714 /* Give the types/attributes to symbols that follow. Give the element
3715 a number so that repeat character length expressions can be copied. */
3719 num_idents_on_line++;
3720 m = variable_decl (elem++);
3721 if (m == MATCH_ERROR)
3726 if (gfc_match_eos () == MATCH_YES)
3728 if (gfc_match_char (',') != MATCH_YES)
3732 if (gfc_error_flag_test () == 0)
3733 gfc_error ("Syntax error in data declaration at %C");
3736 gfc_free_data_all (gfc_current_ns);
3739 gfc_free_array_spec (current_as);
3745 /* Match a prefix associated with a function or subroutine
3746 declaration. If the typespec pointer is nonnull, then a typespec
3747 can be matched. Note that if nothing matches, MATCH_YES is
3748 returned (the null string was matched). */
3751 gfc_match_prefix (gfc_typespec *ts)
3755 gfc_clear_attr (¤t_attr);
3758 gcc_assert (!gfc_matching_prefix);
3759 gfc_matching_prefix = true;
3762 if (!seen_type && ts != NULL
3763 && gfc_match_type_spec (ts, 0) == MATCH_YES
3764 && gfc_match_space () == MATCH_YES)
3771 if (gfc_match ("elemental% ") == MATCH_YES)
3773 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3779 if (gfc_match ("pure% ") == MATCH_YES)
3781 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3787 if (gfc_match ("recursive% ") == MATCH_YES)
3789 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3795 /* At this point, the next item is not a prefix. */
3796 gcc_assert (gfc_matching_prefix);
3797 gfc_matching_prefix = false;
3801 gcc_assert (gfc_matching_prefix);
3802 gfc_matching_prefix = false;
3807 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3810 copy_prefix (symbol_attribute *dest, locus *where)
3812 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3815 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3818 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3825 /* Match a formal argument list. */
3828 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3830 gfc_formal_arglist *head, *tail, *p, *q;
3831 char name[GFC_MAX_SYMBOL_LEN + 1];
3837 if (gfc_match_char ('(') != MATCH_YES)
3844 if (gfc_match_char (')') == MATCH_YES)
3849 if (gfc_match_char ('*') == MATCH_YES)
3853 m = gfc_match_name (name);
3857 if (gfc_get_symbol (name, NULL, &sym))
3861 p = gfc_get_formal_arglist ();
3873 /* We don't add the VARIABLE flavor because the name could be a
3874 dummy procedure. We don't apply these attributes to formal
3875 arguments of statement functions. */
3876 if (sym != NULL && !st_flag
3877 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
3878 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
3884 /* The name of a program unit can be in a different namespace,
3885 so check for it explicitly. After the statement is accepted,
3886 the name is checked for especially in gfc_get_symbol(). */
3887 if (gfc_new_block != NULL && sym != NULL
3888 && strcmp (sym->name, gfc_new_block->name) == 0)
3890 gfc_error ("Name '%s' at %C is the name of the procedure",
3896 if (gfc_match_char (')') == MATCH_YES)
3899 m = gfc_match_char (',');
3902 gfc_error ("Unexpected junk in formal argument list at %C");
3908 /* Check for duplicate symbols in the formal argument list. */
3911 for (p = head; p->next; p = p->next)
3916 for (q = p->next; q; q = q->next)
3917 if (p->sym == q->sym)
3919 gfc_error ("Duplicate symbol '%s' in formal argument list "
3920 "at %C", p->sym->name);
3928 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
3938 gfc_free_formal_arglist (head);
3943 /* Match a RESULT specification following a function declaration or
3944 ENTRY statement. Also matches the end-of-statement. */
3947 match_result (gfc_symbol *function, gfc_symbol **result)
3949 char name[GFC_MAX_SYMBOL_LEN + 1];
3953 if (gfc_match (" result (") != MATCH_YES)
3956 m = gfc_match_name (name);
3960 /* Get the right paren, and that's it because there could be the
3961 bind(c) attribute after the result clause. */
3962 if (gfc_match_char(')') != MATCH_YES)
3964 /* TODO: should report the missing right paren here. */
3968 if (strcmp (function->name, name) == 0)
3970 gfc_error ("RESULT variable at %C must be different than function name");
3974 if (gfc_get_symbol (name, NULL, &r))
3977 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
3986 /* Match a function suffix, which could be a combination of a result
3987 clause and BIND(C), either one, or neither. The draft does not
3988 require them to come in a specific order. */
3991 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
3993 match is_bind_c; /* Found bind(c). */
3994 match is_result; /* Found result clause. */
3995 match found_match; /* Status of whether we've found a good match. */
3996 char peek_char; /* Character we're going to peek at. */
3997 bool allow_binding_name;
3999 /* Initialize to having found nothing. */
4000 found_match = MATCH_NO;
4001 is_bind_c = MATCH_NO;
4002 is_result = MATCH_NO;
4004 /* Get the next char to narrow between result and bind(c). */
4005 gfc_gobble_whitespace ();
4006 peek_char = gfc_peek_ascii_char ();
4008 /* C binding names are not allowed for internal procedures. */
4009 if (gfc_current_state () == COMP_CONTAINS
4010 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4011 allow_binding_name = false;
4013 allow_binding_name = true;
4018 /* Look for result clause. */
4019 is_result = match_result (sym, result);
4020 if (is_result == MATCH_YES)
4022 /* Now see if there is a bind(c) after it. */
4023 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4024 /* We've found the result clause and possibly bind(c). */
4025 found_match = MATCH_YES;
4028 /* This should only be MATCH_ERROR. */
4029 found_match = is_result;
4032 /* Look for bind(c) first. */
4033 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4034 if (is_bind_c == MATCH_YES)
4036 /* Now see if a result clause followed it. */
4037 is_result = match_result (sym, result);
4038 found_match = MATCH_YES;
4042 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4043 found_match = MATCH_ERROR;
4047 gfc_error ("Unexpected junk after function declaration at %C");
4048 found_match = MATCH_ERROR;
4052 if (is_bind_c == MATCH_YES)
4054 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4055 if (gfc_current_state () == COMP_CONTAINS
4056 && sym->ns->proc_name->attr.flavor != FL_MODULE
4057 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4058 "at %L may not be specified for an internal "
4059 "procedure", &gfc_current_locus)
4063 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4072 /* Match a PROCEDURE declaration (R1211). */
4075 match_procedure_decl (void)
4078 locus old_loc, entry_loc;
4079 gfc_symbol *sym, *proc_if = NULL;
4081 gfc_expr *initializer = NULL;
4083 old_loc = entry_loc = gfc_current_locus;
4085 gfc_clear_ts (¤t_ts);
4087 if (gfc_match (" (") != MATCH_YES)
4089 gfc_current_locus = entry_loc;
4093 /* Get the type spec. for the procedure interface. */
4094 old_loc = gfc_current_locus;
4095 m = gfc_match_type_spec (¤t_ts, 0);
4096 gfc_gobble_whitespace ();
4097 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4100 if (m == MATCH_ERROR)
4103 gfc_current_locus = old_loc;
4105 /* Get the name of the procedure or abstract interface
4106 to inherit the interface from. */
4107 m = gfc_match_symbol (&proc_if, 1);
4111 else if (m == MATCH_ERROR)
4114 /* Various interface checks. */
4118 /* Resolve interface if possible. That way, attr.procedure is only set
4119 if it is declared by a later procedure-declaration-stmt, which is
4120 invalid per C1212. */
4121 while (proc_if->ts.interface)
4122 proc_if = proc_if->ts.interface;
4124 if (proc_if->generic)
4126 gfc_error ("Interface '%s' at %C may not be generic", proc_if->name);
4129 if (proc_if->attr.proc == PROC_ST_FUNCTION)
4131 gfc_error ("Interface '%s' at %C may not be a statement function",
4135 /* Handle intrinsic procedures. */
4136 if (!(proc_if->attr.external || proc_if->attr.use_assoc
4137 || proc_if->attr.if_source == IFSRC_IFBODY)
4138 && (gfc_is_intrinsic (proc_if, 0, gfc_current_locus)
4139 || gfc_is_intrinsic (proc_if, 1, gfc_current_locus)))
4140 proc_if->attr.intrinsic = 1;
4141 if (proc_if->attr.intrinsic
4142 && !gfc_intrinsic_actual_ok (proc_if->name, 0))
4144 gfc_error ("Intrinsic procedure '%s' not allowed "
4145 "in PROCEDURE statement at %C", proc_if->name);
4151 if (gfc_match (" )") != MATCH_YES)
4153 gfc_current_locus = entry_loc;
4157 /* Parse attributes. */
4158 m = match_attr_spec();
4159 if (m == MATCH_ERROR)
4162 /* Get procedure symbols. */
4165 m = gfc_match_symbol (&sym, 0);
4168 else if (m == MATCH_ERROR)
4171 /* Add current_attr to the symbol attributes. */
4172 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4175 if (sym->attr.is_bind_c)
4177 /* Check for C1218. */
4178 if (!proc_if || !proc_if->attr.is_bind_c)
4180 gfc_error ("BIND(C) attribute at %C requires "
4181 "an interface with BIND(C)");
4184 /* Check for C1217. */
4185 if (has_name_equals && sym->attr.pointer)
4187 gfc_error ("BIND(C) procedure with NAME may not have "
4188 "POINTER attribute at %C");
4191 if (has_name_equals && sym->attr.dummy)
4193 gfc_error ("Dummy procedure at %C may not have "
4194 "BIND(C) attribute with NAME");
4197 /* Set binding label for BIND(C). */
4198 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4202 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4204 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4207 /* Set interface. */
4208 if (proc_if != NULL)
4210 if (sym->ts.type != BT_UNKNOWN)
4212 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4213 sym->name, &gfc_current_locus,
4214 gfc_basic_typename (sym->ts.type));
4217 sym->ts.interface = proc_if;
4218 sym->attr.untyped = 1;
4220 else if (current_ts.type != BT_UNKNOWN)
4222 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4224 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4225 sym->ts.interface->ts = current_ts;
4226 sym->ts.interface->attr.function = 1;
4227 sym->attr.function = sym->ts.interface->attr.function;
4230 if (gfc_match (" =>") == MATCH_YES)
4232 if (!current_attr.pointer)
4234 gfc_error ("Initialization at %C isn't for a pointer variable");
4239 m = gfc_match_null (&initializer);
4242 gfc_error ("Pointer initialization requires a NULL() at %C");
4246 if (gfc_pure (NULL))
4248 gfc_error ("Initialization of pointer at %C is not allowed in "
4249 "a PURE procedure");
4256 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4262 gfc_set_sym_referenced (sym);
4264 if (gfc_match_eos () == MATCH_YES)
4266 if (gfc_match_char (',') != MATCH_YES)
4271 gfc_error ("Syntax error in PROCEDURE statement at %C");
4275 /* Free stuff up and return. */
4276 gfc_free_expr (initializer);
4281 /* Match a PROCEDURE declaration inside an interface (R1206). */
4284 match_procedure_in_interface (void)
4288 char name[GFC_MAX_SYMBOL_LEN + 1];
4290 if (current_interface.type == INTERFACE_NAMELESS
4291 || current_interface.type == INTERFACE_ABSTRACT)
4293 gfc_error ("PROCEDURE at %C must be in a generic interface");
4299 m = gfc_match_name (name);
4302 else if (m == MATCH_ERROR)
4304 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4307 if (gfc_add_interface (sym) == FAILURE)
4310 if (gfc_match_eos () == MATCH_YES)
4312 if (gfc_match_char (',') != MATCH_YES)
4319 gfc_error ("Syntax error in PROCEDURE statement at %C");
4324 /* General matcher for PROCEDURE declarations. */
4326 static match match_procedure_in_type (void);
4329 gfc_match_procedure (void)
4333 switch (gfc_current_state ())
4338 case COMP_SUBROUTINE:
4340 m = match_procedure_decl ();
4342 case COMP_INTERFACE:
4343 m = match_procedure_in_interface ();
4346 gfc_error ("Fortran 2003: Procedure components at %C are not yet"
4347 " implemented in gfortran");
4349 case COMP_DERIVED_CONTAINS:
4350 m = match_procedure_in_type ();
4359 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4367 /* Warn if a matched procedure has the same name as an intrinsic; this is
4368 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4369 parser-state-stack to find out whether we're in a module. */
4372 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4376 in_module = (gfc_state_stack->previous
4377 && gfc_state_stack->previous->state == COMP_MODULE);
4379 gfc_warn_intrinsic_shadow (sym, in_module, func);
4383 /* Match a function declaration. */
4386 gfc_match_function_decl (void)
4388 char name[GFC_MAX_SYMBOL_LEN + 1];
4389 gfc_symbol *sym, *result;
4393 match found_match; /* Status returned by match func. */
4395 if (gfc_current_state () != COMP_NONE
4396 && gfc_current_state () != COMP_INTERFACE
4397 && gfc_current_state () != COMP_CONTAINS)
4400 gfc_clear_ts (¤t_ts);
4402 old_loc = gfc_current_locus;
4404 m = gfc_match_prefix (¤t_ts);
4407 gfc_current_locus = old_loc;
4411 if (gfc_match ("function% %n", name) != MATCH_YES)
4413 gfc_current_locus = old_loc;
4416 if (get_proc_name (name, &sym, false))
4418 gfc_new_block = sym;
4420 m = gfc_match_formal_arglist (sym, 0, 0);
4423 gfc_error ("Expected formal argument list in function "
4424 "definition at %C");
4428 else if (m == MATCH_ERROR)
4433 /* According to the draft, the bind(c) and result clause can
4434 come in either order after the formal_arg_list (i.e., either
4435 can be first, both can exist together or by themselves or neither
4436 one). Therefore, the match_result can't match the end of the
4437 string, and check for the bind(c) or result clause in either order. */
4438 found_match = gfc_match_eos ();
4440 /* Make sure that it isn't already declared as BIND(C). If it is, it
4441 must have been marked BIND(C) with a BIND(C) attribute and that is
4442 not allowed for procedures. */
4443 if (sym->attr.is_bind_c == 1)
4445 sym->attr.is_bind_c = 0;
4446 if (sym->old_symbol != NULL)
4447 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4448 "variables or common blocks",
4449 &(sym->old_symbol->declared_at));
4451 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4452 "variables or common blocks", &gfc_current_locus);
4455 if (found_match != MATCH_YES)
4457 /* If we haven't found the end-of-statement, look for a suffix. */
4458 suffix_match = gfc_match_suffix (sym, &result);
4459 if (suffix_match == MATCH_YES)
4460 /* Need to get the eos now. */
4461 found_match = gfc_match_eos ();
4463 found_match = suffix_match;
4466 if(found_match != MATCH_YES)
4470 /* Make changes to the symbol. */
4473 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4476 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4477 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4480 if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN
4481 && !sym->attr.implicit_type)
4483 gfc_error ("Function '%s' at %C already has a type of %s", name,
4484 gfc_basic_typename (sym->ts.type));
4488 /* Delay matching the function characteristics until after the
4489 specification block by signalling kind=-1. */
4490 sym->declared_at = old_loc;
4491 if (current_ts.type != BT_UNKNOWN)
4492 current_ts.kind = -1;
4494 current_ts.kind = 0;
4498 sym->ts = current_ts;
4503 result->ts = current_ts;
4504 sym->result = result;
4507 /* Warn if this procedure has the same name as an intrinsic. */
4508 warn_intrinsic_shadow (sym, true);
4514 gfc_current_locus = old_loc;
4519 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4520 pass the name of the entry, rather than the gfc_current_block name, and
4521 to return false upon finding an existing global entry. */
4524 add_global_entry (const char *name, int sub)
4529 s = gfc_get_gsymbol(name);
4530 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4533 || (s->type != GSYM_UNKNOWN
4534 && s->type != type))
4535 gfc_global_used(s, NULL);
4539 s->where = gfc_current_locus;
4541 s->ns = gfc_current_ns;
4548 /* Match an ENTRY statement. */
4551 gfc_match_entry (void)
4556 char name[GFC_MAX_SYMBOL_LEN + 1];
4557 gfc_compile_state state;
4561 bool module_procedure;
4565 m = gfc_match_name (name);
4569 state = gfc_current_state ();
4570 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4575 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4578 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4580 case COMP_BLOCK_DATA:
4581 gfc_error ("ENTRY statement at %C cannot appear within "
4584 case COMP_INTERFACE:
4585 gfc_error ("ENTRY statement at %C cannot appear within "
4589 gfc_error ("ENTRY statement at %C cannot appear within "
4590 "a DERIVED TYPE block");
4593 gfc_error ("ENTRY statement at %C cannot appear within "
4594 "an IF-THEN block");
4597 gfc_error ("ENTRY statement at %C cannot appear within "
4601 gfc_error ("ENTRY statement at %C cannot appear within "
4605 gfc_error ("ENTRY statement at %C cannot appear within "
4609 gfc_error ("ENTRY statement at %C cannot appear within "
4613 gfc_error ("ENTRY statement at %C cannot appear within "
4614 "a contained subprogram");
4617 gfc_internal_error ("gfc_match_entry(): Bad state");
4622 module_procedure = gfc_current_ns->parent != NULL
4623 && gfc_current_ns->parent->proc_name
4624 && gfc_current_ns->parent->proc_name->attr.flavor
4627 if (gfc_current_ns->parent != NULL
4628 && gfc_current_ns->parent->proc_name
4629 && !module_procedure)
4631 gfc_error("ENTRY statement at %C cannot appear in a "
4632 "contained procedure");
4636 /* Module function entries need special care in get_proc_name
4637 because previous references within the function will have
4638 created symbols attached to the current namespace. */
4639 if (get_proc_name (name, &entry,
4640 gfc_current_ns->parent != NULL
4641 && module_procedure))
4644 proc = gfc_current_block ();
4646 /* Make sure that it isn't already declared as BIND(C). If it is, it
4647 must have been marked BIND(C) with a BIND(C) attribute and that is
4648 not allowed for procedures. */
4649 if (entry->attr.is_bind_c == 1)
4651 entry->attr.is_bind_c = 0;
4652 if (entry->old_symbol != NULL)
4653 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4654 "variables or common blocks",
4655 &(entry->old_symbol->declared_at));
4657 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4658 "variables or common blocks", &gfc_current_locus);
4661 /* Check what next non-whitespace character is so we can tell if there
4662 is the required parens if we have a BIND(C). */
4663 gfc_gobble_whitespace ();
4664 peek_char = gfc_peek_ascii_char ();
4666 if (state == COMP_SUBROUTINE)
4668 /* An entry in a subroutine. */
4669 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
4672 m = gfc_match_formal_arglist (entry, 0, 1);
4676 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
4677 never be an internal procedure. */
4678 is_bind_c = gfc_match_bind_c (entry, true);
4679 if (is_bind_c == MATCH_ERROR)
4681 if (is_bind_c == MATCH_YES)
4683 if (peek_char != '(')
4685 gfc_error ("Missing required parentheses before BIND(C) at %C");
4688 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
4693 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4694 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
4699 /* An entry in a function.
4700 We need to take special care because writing
4705 ENTRY f() RESULT (r)
4707 ENTRY f RESULT (r). */
4708 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
4711 old_loc = gfc_current_locus;
4712 if (gfc_match_eos () == MATCH_YES)
4714 gfc_current_locus = old_loc;
4715 /* Match the empty argument list, and add the interface to
4717 m = gfc_match_formal_arglist (entry, 0, 1);
4720 m = gfc_match_formal_arglist (entry, 0, 0);
4727 if (gfc_match_eos () == MATCH_YES)
4729 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4730 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4733 entry->result = entry;
4737 m = gfc_match_suffix (entry, &result);
4739 gfc_syntax_error (ST_ENTRY);
4745 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
4746 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
4747 || gfc_add_function (&entry->attr, result->name, NULL)
4750 entry->result = result;
4754 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
4755 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
4757 entry->result = entry;
4762 if (gfc_match_eos () != MATCH_YES)
4764 gfc_syntax_error (ST_ENTRY);
4768 entry->attr.recursive = proc->attr.recursive;
4769 entry->attr.elemental = proc->attr.elemental;
4770 entry->attr.pure = proc->attr.pure;
4772 el = gfc_get_entry_list ();
4774 el->next = gfc_current_ns->entries;
4775 gfc_current_ns->entries = el;
4777 el->id = el->next->id + 1;
4781 new_st.op = EXEC_ENTRY;
4782 new_st.ext.entry = el;
4788 /* Match a subroutine statement, including optional prefixes. */
4791 gfc_match_subroutine (void)
4793 char name[GFC_MAX_SYMBOL_LEN + 1];
4798 bool allow_binding_name;
4800 if (gfc_current_state () != COMP_NONE
4801 && gfc_current_state () != COMP_INTERFACE
4802 && gfc_current_state () != COMP_CONTAINS)
4805 m = gfc_match_prefix (NULL);
4809 m = gfc_match ("subroutine% %n", name);
4813 if (get_proc_name (name, &sym, false))
4815 gfc_new_block = sym;
4817 /* Check what next non-whitespace character is so we can tell if there
4818 is the required parens if we have a BIND(C). */
4819 gfc_gobble_whitespace ();
4820 peek_char = gfc_peek_ascii_char ();
4822 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
4825 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
4828 /* Make sure that it isn't already declared as BIND(C). If it is, it
4829 must have been marked BIND(C) with a BIND(C) attribute and that is
4830 not allowed for procedures. */
4831 if (sym->attr.is_bind_c == 1)
4833 sym->attr.is_bind_c = 0;
4834 if (sym->old_symbol != NULL)
4835 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4836 "variables or common blocks",
4837 &(sym->old_symbol->declared_at));
4839 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4840 "variables or common blocks", &gfc_current_locus);
4843 /* C binding names are not allowed for internal procedures. */
4844 if (gfc_current_state () == COMP_CONTAINS
4845 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4846 allow_binding_name = false;
4848 allow_binding_name = true;
4850 /* Here, we are just checking if it has the bind(c) attribute, and if
4851 so, then we need to make sure it's all correct. If it doesn't,
4852 we still need to continue matching the rest of the subroutine line. */
4853 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4854 if (is_bind_c == MATCH_ERROR)
4856 /* There was an attempt at the bind(c), but it was wrong. An
4857 error message should have been printed w/in the gfc_match_bind_c
4858 so here we'll just return the MATCH_ERROR. */
4862 if (is_bind_c == MATCH_YES)
4864 /* The following is allowed in the Fortran 2008 draft. */
4865 if (gfc_current_state () == COMP_CONTAINS
4866 && sym->ns->proc_name->attr.flavor != FL_MODULE
4867 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4868 "at %L may not be specified for an internal "
4869 "procedure", &gfc_current_locus)
4873 if (peek_char != '(')
4875 gfc_error ("Missing required parentheses before BIND(C) at %C");
4878 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
4883 if (gfc_match_eos () != MATCH_YES)
4885 gfc_syntax_error (ST_SUBROUTINE);
4889 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4892 /* Warn if it has the same name as an intrinsic. */
4893 warn_intrinsic_shadow (sym, false);
4899 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
4900 given, and set the binding label in either the given symbol (if not
4901 NULL), or in the current_ts. The symbol may be NULL because we may
4902 encounter the BIND(C) before the declaration itself. Return
4903 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
4904 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
4905 or MATCH_YES if the specifier was correct and the binding label and
4906 bind(c) fields were set correctly for the given symbol or the
4907 current_ts. If allow_binding_name is false, no binding name may be
4911 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
4913 /* binding label, if exists */
4914 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
4918 /* Initialize the flag that specifies whether we encountered a NAME=
4919 specifier or not. */
4920 has_name_equals = 0;
4922 /* Init the first char to nil so we can catch if we don't have
4923 the label (name attr) or the symbol name yet. */
4924 binding_label[0] = '\0';
4926 /* This much we have to be able to match, in this order, if
4927 there is a bind(c) label. */
4928 if (gfc_match (" bind ( c ") != MATCH_YES)
4931 /* Now see if there is a binding label, or if we've reached the
4932 end of the bind(c) attribute without one. */
4933 if (gfc_match_char (',') == MATCH_YES)
4935 if (gfc_match (" name = ") != MATCH_YES)
4937 gfc_error ("Syntax error in NAME= specifier for binding label "
4939 /* should give an error message here */
4943 has_name_equals = 1;
4945 /* Get the opening quote. */
4946 double_quote = MATCH_YES;
4947 single_quote = MATCH_YES;
4948 double_quote = gfc_match_char ('"');
4949 if (double_quote != MATCH_YES)
4950 single_quote = gfc_match_char ('\'');
4951 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
4953 gfc_error ("Syntax error in NAME= specifier for binding label "
4958 /* Grab the binding label, using functions that will not lower
4959 case the names automatically. */
4960 if (gfc_match_name_C (binding_label) != MATCH_YES)
4963 /* Get the closing quotation. */
4964 if (double_quote == MATCH_YES)
4966 if (gfc_match_char ('"') != MATCH_YES)
4968 gfc_error ("Missing closing quote '\"' for binding label at %C");
4969 /* User started string with '"' so looked to match it. */
4975 if (gfc_match_char ('\'') != MATCH_YES)
4977 gfc_error ("Missing closing quote '\'' for binding label at %C");
4978 /* User started string with "'" char. */
4984 /* Get the required right paren. */
4985 if (gfc_match_char (')') != MATCH_YES)
4987 gfc_error ("Missing closing paren for binding label at %C");
4991 if (has_name_equals && !allow_binding_name)
4993 gfc_error ("No binding name is allowed in BIND(C) at %C");
4997 if (has_name_equals && sym != NULL && sym->attr.dummy)
4999 gfc_error ("For dummy procedure %s, no binding name is "
5000 "allowed in BIND(C) at %C", sym->name);
5005 /* Save the binding label to the symbol. If sym is null, we're
5006 probably matching the typespec attributes of a declaration and
5007 haven't gotten the name yet, and therefore, no symbol yet. */
5008 if (binding_label[0] != '\0')
5012 strcpy (sym->binding_label, binding_label);
5015 strcpy (curr_binding_label, binding_label);
5017 else if (allow_binding_name)
5019 /* No binding label, but if symbol isn't null, we
5020 can set the label for it here.
5021 If name="" or allow_binding_name is false, no C binding name is
5023 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5024 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5027 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5028 && current_interface.type == INTERFACE_ABSTRACT)
5030 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5038 /* Return nonzero if we're currently compiling a contained procedure. */
5041 contained_procedure (void)
5043 gfc_state_data *s = gfc_state_stack;
5045 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5046 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5052 /* Set the kind of each enumerator. The kind is selected such that it is
5053 interoperable with the corresponding C enumeration type, making
5054 sure that -fshort-enums is honored. */
5059 enumerator_history *current_history = NULL;
5063 if (max_enum == NULL || enum_history == NULL)
5066 if (!gfc_option.fshort_enums)
5072 kind = gfc_integer_kinds[i++].kind;
5074 while (kind < gfc_c_int_kind
5075 && gfc_check_integer_range (max_enum->initializer->value.integer,
5078 current_history = enum_history;
5079 while (current_history != NULL)
5081 current_history->sym->ts.kind = kind;
5082 current_history = current_history->next;
5087 /* Match any of the various end-block statements. Returns the type of
5088 END to the caller. The END INTERFACE, END IF, END DO and END
5089 SELECT statements cannot be replaced by a single END statement. */
5092 gfc_match_end (gfc_statement *st)
5094 char name[GFC_MAX_SYMBOL_LEN + 1];
5095 gfc_compile_state state;
5097 const char *block_name;
5102 old_loc = gfc_current_locus;
5103 if (gfc_match ("end") != MATCH_YES)
5106 state = gfc_current_state ();
5107 block_name = gfc_current_block () == NULL
5108 ? NULL : gfc_current_block ()->name;
5110 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5112 state = gfc_state_stack->previous->state;
5113 block_name = gfc_state_stack->previous->sym == NULL
5114 ? NULL : gfc_state_stack->previous->sym->name;
5121 *st = ST_END_PROGRAM;
5122 target = " program";
5126 case COMP_SUBROUTINE:
5127 *st = ST_END_SUBROUTINE;
5128 target = " subroutine";
5129 eos_ok = !contained_procedure ();
5133 *st = ST_END_FUNCTION;
5134 target = " function";
5135 eos_ok = !contained_procedure ();
5138 case COMP_BLOCK_DATA:
5139 *st = ST_END_BLOCK_DATA;
5140 target = " block data";
5145 *st = ST_END_MODULE;
5150 case COMP_INTERFACE:
5151 *st = ST_END_INTERFACE;
5152 target = " interface";
5157 case COMP_DERIVED_CONTAINS:
5176 *st = ST_END_SELECT;
5182 *st = ST_END_FORALL;
5197 last_initializer = NULL;
5199 gfc_free_enum_history ();
5203 gfc_error ("Unexpected END statement at %C");
5207 if (gfc_match_eos () == MATCH_YES)
5211 /* We would have required END [something]. */
5212 gfc_error ("%s statement expected at %L",
5213 gfc_ascii_statement (*st), &old_loc);
5220 /* Verify that we've got the sort of end-block that we're expecting. */
5221 if (gfc_match (target) != MATCH_YES)
5223 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5227 /* If we're at the end, make sure a block name wasn't required. */
5228 if (gfc_match_eos () == MATCH_YES)
5231 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5232 && *st != ST_END_FORALL && *st != ST_END_WHERE)
5235 if (gfc_current_block () == NULL)
5238 gfc_error ("Expected block name of '%s' in %s statement at %C",
5239 block_name, gfc_ascii_statement (*st));
5244 /* END INTERFACE has a special handler for its several possible endings. */
5245 if (*st == ST_END_INTERFACE)
5246 return gfc_match_end_interface ();
5248 /* We haven't hit the end of statement, so what is left must be an
5250 m = gfc_match_space ();
5252 m = gfc_match_name (name);
5255 gfc_error ("Expected terminating name at %C");
5259 if (block_name == NULL)
5262 if (strcmp (name, block_name) != 0)
5264 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5265 gfc_ascii_statement (*st));
5269 if (gfc_match_eos () == MATCH_YES)
5273 gfc_syntax_error (*st);
5276 gfc_current_locus = old_loc;
5282 /***************** Attribute declaration statements ****************/
5284 /* Set the attribute of a single variable. */
5289 char name[GFC_MAX_SYMBOL_LEN + 1];
5297 m = gfc_match_name (name);
5301 if (find_special (name, &sym))
5304 var_locus = gfc_current_locus;
5306 /* Deal with possible array specification for certain attributes. */
5307 if (current_attr.dimension
5308 || current_attr.allocatable
5309 || current_attr.pointer
5310 || current_attr.target)
5312 m = gfc_match_array_spec (&as);
5313 if (m == MATCH_ERROR)
5316 if (current_attr.dimension && m == MATCH_NO)
5318 gfc_error ("Missing array specification at %L in DIMENSION "
5319 "statement", &var_locus);
5324 if (current_attr.dimension && sym->value)
5326 gfc_error ("Dimensions specified for %s at %L after its "
5327 "initialisation", sym->name, &var_locus);
5332 if ((current_attr.allocatable || current_attr.pointer)
5333 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5335 gfc_error ("Array specification must be deferred at %L", &var_locus);
5341 /* Update symbol table. DIMENSION attribute is set
5342 in gfc_set_array_spec(). */
5343 if (current_attr.dimension == 0
5344 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5350 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5356 if (sym->attr.cray_pointee && sym->as != NULL)
5358 /* Fix the array spec. */
5359 m = gfc_mod_pointee_as (sym->as);
5360 if (m == MATCH_ERROR)
5364 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5370 if ((current_attr.external || current_attr.intrinsic)
5371 && sym->attr.flavor != FL_PROCEDURE
5372 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5381 gfc_free_array_spec (as);
5386 /* Generic attribute declaration subroutine. Used for attributes that
5387 just have a list of names. */
5394 /* Gobble the optional double colon, by simply ignoring the result
5404 if (gfc_match_eos () == MATCH_YES)
5410 if (gfc_match_char (',') != MATCH_YES)
5412 gfc_error ("Unexpected character in variable list at %C");
5422 /* This routine matches Cray Pointer declarations of the form:
5423 pointer ( <pointer>, <pointee> )
5425 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5426 The pointer, if already declared, should be an integer. Otherwise, we
5427 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5428 be either a scalar, or an array declaration. No space is allocated for
5429 the pointee. For the statement
5430 pointer (ipt, ar(10))
5431 any subsequent uses of ar will be translated (in C-notation) as
5432 ar(i) => ((<type> *) ipt)(i)
5433 After gimplification, pointee variable will disappear in the code. */
5436 cray_pointer_decl (void)
5440 gfc_symbol *cptr; /* Pointer symbol. */
5441 gfc_symbol *cpte; /* Pointee symbol. */
5447 if (gfc_match_char ('(') != MATCH_YES)
5449 gfc_error ("Expected '(' at %C");
5453 /* Match pointer. */
5454 var_locus = gfc_current_locus;
5455 gfc_clear_attr (¤t_attr);
5456 gfc_add_cray_pointer (¤t_attr, &var_locus);
5457 current_ts.type = BT_INTEGER;
5458 current_ts.kind = gfc_index_integer_kind;
5460 m = gfc_match_symbol (&cptr, 0);
5463 gfc_error ("Expected variable name at %C");
5467 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5470 gfc_set_sym_referenced (cptr);
5472 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5474 cptr->ts.type = BT_INTEGER;
5475 cptr->ts.kind = gfc_index_integer_kind;
5477 else if (cptr->ts.type != BT_INTEGER)
5479 gfc_error ("Cray pointer at %C must be an integer");
5482 else if (cptr->ts.kind < gfc_index_integer_kind)
5483 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5484 " memory addresses require %d bytes",
5485 cptr->ts.kind, gfc_index_integer_kind);
5487 if (gfc_match_char (',') != MATCH_YES)
5489 gfc_error ("Expected \",\" at %C");
5493 /* Match Pointee. */
5494 var_locus = gfc_current_locus;
5495 gfc_clear_attr (¤t_attr);
5496 gfc_add_cray_pointee (¤t_attr, &var_locus);
5497 current_ts.type = BT_UNKNOWN;
5498 current_ts.kind = 0;
5500 m = gfc_match_symbol (&cpte, 0);
5503 gfc_error ("Expected variable name at %C");
5507 /* Check for an optional array spec. */
5508 m = gfc_match_array_spec (&as);
5509 if (m == MATCH_ERROR)
5511 gfc_free_array_spec (as);
5514 else if (m == MATCH_NO)
5516 gfc_free_array_spec (as);
5520 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5523 gfc_set_sym_referenced (cpte);
5525 if (cpte->as == NULL)
5527 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5528 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5530 else if (as != NULL)
5532 gfc_error ("Duplicate array spec for Cray pointee at %C");
5533 gfc_free_array_spec (as);
5539 if (cpte->as != NULL)
5541 /* Fix array spec. */
5542 m = gfc_mod_pointee_as (cpte->as);
5543 if (m == MATCH_ERROR)
5547 /* Point the Pointee at the Pointer. */
5548 cpte->cp_pointer = cptr;
5550 if (gfc_match_char (')') != MATCH_YES)
5552 gfc_error ("Expected \")\" at %C");
5555 m = gfc_match_char (',');
5557 done = true; /* Stop searching for more declarations. */
5561 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5562 || gfc_match_eos () != MATCH_YES)
5564 gfc_error ("Expected \",\" or end of statement at %C");
5572 gfc_match_external (void)
5575 gfc_clear_attr (¤t_attr);
5576 current_attr.external = 1;
5578 return attr_decl ();
5583 gfc_match_intent (void)
5587 intent = match_intent_spec ();
5588 if (intent == INTENT_UNKNOWN)
5591 gfc_clear_attr (¤t_attr);
5592 current_attr.intent = intent;
5594 return attr_decl ();
5599 gfc_match_intrinsic (void)
5602 gfc_clear_attr (¤t_attr);
5603 current_attr.intrinsic = 1;
5605 return attr_decl ();
5610 gfc_match_optional (void)
5613 gfc_clear_attr (¤t_attr);
5614 current_attr.optional = 1;
5616 return attr_decl ();
5621 gfc_match_pointer (void)
5623 gfc_gobble_whitespace ();
5624 if (gfc_peek_ascii_char () == '(')
5626 if (!gfc_option.flag_cray_pointer)
5628 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
5632 return cray_pointer_decl ();
5636 gfc_clear_attr (¤t_attr);
5637 current_attr.pointer = 1;
5639 return attr_decl ();
5645 gfc_match_allocatable (void)
5647 gfc_clear_attr (¤t_attr);
5648 current_attr.allocatable = 1;
5650 return attr_decl ();
5655 gfc_match_dimension (void)
5657 gfc_clear_attr (¤t_attr);
5658 current_attr.dimension = 1;
5660 return attr_decl ();
5665 gfc_match_target (void)
5667 gfc_clear_attr (¤t_attr);
5668 current_attr.target = 1;
5670 return attr_decl ();
5674 /* Match the list of entities being specified in a PUBLIC or PRIVATE
5678 access_attr_decl (gfc_statement st)
5680 char name[GFC_MAX_SYMBOL_LEN + 1];
5681 interface_type type;
5684 gfc_intrinsic_op op;
5687 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5692 m = gfc_match_generic_spec (&type, name, &op);
5695 if (m == MATCH_ERROR)
5700 case INTERFACE_NAMELESS:
5701 case INTERFACE_ABSTRACT:
5704 case INTERFACE_GENERIC:
5705 if (gfc_get_symbol (name, NULL, &sym))
5708 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
5709 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
5710 sym->name, NULL) == FAILURE)
5715 case INTERFACE_INTRINSIC_OP:
5716 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
5718 gfc_current_ns->operator_access[op] =
5719 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5723 gfc_error ("Access specification of the %s operator at %C has "
5724 "already been specified", gfc_op2string (op));
5730 case INTERFACE_USER_OP:
5731 uop = gfc_get_uop (name);
5733 if (uop->access == ACCESS_UNKNOWN)
5735 uop->access = (st == ST_PUBLIC)
5736 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
5740 gfc_error ("Access specification of the .%s. operator at %C "
5741 "has already been specified", sym->name);
5748 if (gfc_match_char (',') == MATCH_NO)
5752 if (gfc_match_eos () != MATCH_YES)
5757 gfc_syntax_error (st);
5765 gfc_match_protected (void)
5770 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
5772 gfc_error ("PROTECTED at %C only allowed in specification "
5773 "part of a module");
5778 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
5782 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
5787 if (gfc_match_eos () == MATCH_YES)
5792 m = gfc_match_symbol (&sym, 0);
5796 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
5809 if (gfc_match_eos () == MATCH_YES)
5811 if (gfc_match_char (',') != MATCH_YES)
5818 gfc_error ("Syntax error in PROTECTED statement at %C");
5823 /* The PRIVATE statement is a bit weird in that it can be an attribute
5824 declaration, but also works as a standalone statement inside of a
5825 type declaration or a module. */
5828 gfc_match_private (gfc_statement *st)
5831 if (gfc_match ("private") != MATCH_YES)
5834 if (gfc_current_state () != COMP_MODULE
5835 && !(gfc_current_state () == COMP_DERIVED
5836 && gfc_state_stack->previous
5837 && gfc_state_stack->previous->state == COMP_MODULE)
5838 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
5839 && gfc_state_stack->previous && gfc_state_stack->previous->previous
5840 && gfc_state_stack->previous->previous->state == COMP_MODULE))
5842 gfc_error ("PRIVATE statement at %C is only allowed in the "
5843 "specification part of a module");
5847 if (gfc_current_state () == COMP_DERIVED)
5849 if (gfc_match_eos () == MATCH_YES)
5855 gfc_syntax_error (ST_PRIVATE);
5859 if (gfc_match_eos () == MATCH_YES)
5866 return access_attr_decl (ST_PRIVATE);
5871 gfc_match_public (gfc_statement *st)
5874 if (gfc_match ("public") != MATCH_YES)
5877 if (gfc_current_state () != COMP_MODULE)
5879 gfc_error ("PUBLIC statement at %C is only allowed in the "
5880 "specification part of a module");
5884 if (gfc_match_eos () == MATCH_YES)
5891 return access_attr_decl (ST_PUBLIC);
5895 /* Workhorse for gfc_match_parameter. */
5904 m = gfc_match_symbol (&sym, 0);
5906 gfc_error ("Expected variable name at %C in PARAMETER statement");
5911 if (gfc_match_char ('=') == MATCH_NO)
5913 gfc_error ("Expected = sign in PARAMETER statement at %C");
5917 m = gfc_match_init_expr (&init);
5919 gfc_error ("Expected expression at %C in PARAMETER statement");
5923 if (sym->ts.type == BT_UNKNOWN
5924 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
5930 if (gfc_check_assign_symbol (sym, init) == FAILURE
5931 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
5939 gfc_error ("Initializing already initialized variable at %C");
5944 if (sym->ts.type == BT_CHARACTER
5945 && sym->ts.cl != NULL
5946 && sym->ts.cl->length != NULL
5947 && sym->ts.cl->length->expr_type == EXPR_CONSTANT
5948 && init->expr_type == EXPR_CONSTANT
5949 && init->ts.type == BT_CHARACTER)
5950 gfc_set_constant_character_len (
5951 mpz_get_si (sym->ts.cl->length->value.integer), init, -1);
5952 else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL
5953 && sym->ts.cl->length == NULL)
5956 if (init->expr_type == EXPR_CONSTANT)
5958 clen = init->value.character.length;
5959 sym->ts.cl->length = gfc_int_expr (clen);
5961 else if (init->expr_type == EXPR_ARRAY)
5963 gfc_expr *p = init->value.constructor->expr;
5964 clen = p->value.character.length;
5965 sym->ts.cl->length = gfc_int_expr (clen);
5967 else if (init->ts.cl && init->ts.cl->length)
5968 sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length);
5975 gfc_free_expr (init);
5980 /* Match a parameter statement, with the weird syntax that these have. */
5983 gfc_match_parameter (void)
5987 if (gfc_match_char ('(') == MATCH_NO)
5996 if (gfc_match (" )%t") == MATCH_YES)
5999 if (gfc_match_char (',') != MATCH_YES)
6001 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6011 /* Save statements have a special syntax. */
6014 gfc_match_save (void)
6016 char n[GFC_MAX_SYMBOL_LEN+1];
6021 if (gfc_match_eos () == MATCH_YES)
6023 if (gfc_current_ns->seen_save)
6025 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6026 "follows previous SAVE statement")
6031 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6035 if (gfc_current_ns->save_all)
6037 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6038 "blanket SAVE statement")
6047 m = gfc_match_symbol (&sym, 0);
6051 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6063 m = gfc_match (" / %n /", &n);
6064 if (m == MATCH_ERROR)
6069 c = gfc_get_common (n, 0);
6072 gfc_current_ns->seen_save = 1;
6075 if (gfc_match_eos () == MATCH_YES)
6077 if (gfc_match_char (',') != MATCH_YES)
6084 gfc_error ("Syntax error in SAVE statement at %C");
6090 gfc_match_value (void)
6095 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6099 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6104 if (gfc_match_eos () == MATCH_YES)
6109 m = gfc_match_symbol (&sym, 0);
6113 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6126 if (gfc_match_eos () == MATCH_YES)
6128 if (gfc_match_char (',') != MATCH_YES)
6135 gfc_error ("Syntax error in VALUE statement at %C");
6141 gfc_match_volatile (void)
6146 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6150 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6155 if (gfc_match_eos () == MATCH_YES)
6160 /* VOLATILE is special because it can be added to host-associated
6162 m = gfc_match_symbol (&sym, 1);
6166 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6179 if (gfc_match_eos () == MATCH_YES)
6181 if (gfc_match_char (',') != MATCH_YES)
6188 gfc_error ("Syntax error in VOLATILE statement at %C");
6193 /* Match a module procedure statement. Note that we have to modify
6194 symbols in the parent's namespace because the current one was there
6195 to receive symbols that are in an interface's formal argument list. */
6198 gfc_match_modproc (void)
6200 char name[GFC_MAX_SYMBOL_LEN + 1];
6203 gfc_namespace *module_ns;
6204 gfc_interface *old_interface_head, *interface;
6206 if (gfc_state_stack->state != COMP_INTERFACE
6207 || gfc_state_stack->previous == NULL
6208 || current_interface.type == INTERFACE_NAMELESS
6209 || current_interface.type == INTERFACE_ABSTRACT)
6211 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6216 module_ns = gfc_current_ns->parent;
6217 for (; module_ns; module_ns = module_ns->parent)
6218 if (module_ns->proc_name->attr.flavor == FL_MODULE)
6221 if (module_ns == NULL)
6224 /* Store the current state of the interface. We will need it if we
6225 end up with a syntax error and need to recover. */
6226 old_interface_head = gfc_current_interface_head ();
6232 m = gfc_match_name (name);
6238 /* Check for syntax error before starting to add symbols to the
6239 current namespace. */
6240 if (gfc_match_eos () == MATCH_YES)
6242 if (!last && gfc_match_char (',') != MATCH_YES)
6245 /* Now we're sure the syntax is valid, we process this item
6247 if (gfc_get_symbol (name, module_ns, &sym))
6250 if (sym->attr.proc != PROC_MODULE
6251 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6252 sym->name, NULL) == FAILURE)
6255 if (gfc_add_interface (sym) == FAILURE)
6258 sym->attr.mod_proc = 1;
6267 /* Restore the previous state of the interface. */
6268 interface = gfc_current_interface_head ();
6269 gfc_set_current_interface_head (old_interface_head);
6271 /* Free the new interfaces. */
6272 while (interface != old_interface_head)
6274 gfc_interface *i = interface->next;
6275 gfc_free (interface);
6279 /* And issue a syntax error. */
6280 gfc_syntax_error (ST_MODULE_PROC);
6285 /* Check a derived type that is being extended. */
6287 check_extended_derived_type (char *name)
6289 gfc_symbol *extended;
6291 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6293 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6299 gfc_error ("No such symbol in TYPE definition at %C");
6303 if (extended->attr.flavor != FL_DERIVED)
6305 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6306 "derived type", name);
6310 if (extended->attr.is_bind_c)
6312 gfc_error ("'%s' cannot be extended at %C because it "
6313 "is BIND(C)", extended->name);
6317 if (extended->attr.sequence)
6319 gfc_error ("'%s' cannot be extended at %C because it "
6320 "is a SEQUENCE type", extended->name);
6328 /* Match the optional attribute specifiers for a type declaration.
6329 Return MATCH_ERROR if an error is encountered in one of the handled
6330 attributes (public, private, bind(c)), MATCH_NO if what's found is
6331 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6332 checking on attribute conflicts needs to be done. */
6335 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6337 /* See if the derived type is marked as private. */
6338 if (gfc_match (" , private") == MATCH_YES)
6340 if (gfc_current_state () != COMP_MODULE)
6342 gfc_error ("Derived type at %C can only be PRIVATE in the "
6343 "specification part of a module");
6347 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6350 else if (gfc_match (" , public") == MATCH_YES)
6352 if (gfc_current_state () != COMP_MODULE)
6354 gfc_error ("Derived type at %C can only be PUBLIC in the "
6355 "specification part of a module");
6359 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6362 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6364 /* If the type is defined to be bind(c) it then needs to make
6365 sure that all fields are interoperable. This will
6366 need to be a semantic check on the finished derived type.
6367 See 15.2.3 (lines 9-12) of F2003 draft. */
6368 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6371 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6373 else if (gfc_match (" , abstract") == MATCH_YES)
6375 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6379 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6382 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6384 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6390 /* If we get here, something matched. */
6395 /* Match the beginning of a derived type declaration. If a type name
6396 was the result of a function, then it is possible to have a symbol
6397 already to be known as a derived type yet have no components. */
6400 gfc_match_derived_decl (void)
6402 char name[GFC_MAX_SYMBOL_LEN + 1];
6403 char parent[GFC_MAX_SYMBOL_LEN + 1];
6404 symbol_attribute attr;
6406 gfc_symbol *extended;
6408 match is_type_attr_spec = MATCH_NO;
6409 bool seen_attr = false;
6411 if (gfc_current_state () == COMP_DERIVED)
6416 gfc_clear_attr (&attr);
6421 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6422 if (is_type_attr_spec == MATCH_ERROR)
6424 if (is_type_attr_spec == MATCH_YES)
6426 } while (is_type_attr_spec == MATCH_YES);
6428 /* Deal with derived type extensions. The extension attribute has
6429 been added to 'attr' but now the parent type must be found and
6432 extended = check_extended_derived_type (parent);
6434 if (parent[0] && !extended)
6437 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6439 gfc_error ("Expected :: in TYPE definition at %C");
6443 m = gfc_match (" %n%t", name);
6447 /* Make sure the name is not the name of an intrinsic type. */
6448 if (gfc_is_intrinsic_typename (name))
6450 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
6455 if (gfc_get_symbol (name, NULL, &sym))
6458 if (sym->ts.type != BT_UNKNOWN)
6460 gfc_error ("Derived type name '%s' at %C already has a basic type "
6461 "of %s", sym->name, gfc_typename (&sym->ts));
6465 /* The symbol may already have the derived attribute without the
6466 components. The ways this can happen is via a function
6467 definition, an INTRINSIC statement or a subtype in another
6468 derived type that is a pointer. The first part of the AND clause
6469 is true if the symbol is not the return value of a function. */
6470 if (sym->attr.flavor != FL_DERIVED
6471 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
6474 if (sym->components != NULL || sym->attr.zero_comp)
6476 gfc_error ("Derived type definition of '%s' at %C has already been "
6477 "defined", sym->name);
6481 if (attr.access != ACCESS_UNKNOWN
6482 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
6485 /* See if the derived type was labeled as bind(c). */
6486 if (attr.is_bind_c != 0)
6487 sym->attr.is_bind_c = attr.is_bind_c;
6489 /* Construct the f2k_derived namespace if it is not yet there. */
6490 if (!sym->f2k_derived)
6491 sym->f2k_derived = gfc_get_namespace (NULL, 0);
6493 if (extended && !sym->components)
6498 /* Add the extended derived type as the first component. */
6499 gfc_add_component (sym, parent, &p);
6500 sym->attr.extension = attr.extension;
6502 gfc_set_sym_referenced (extended);
6504 p->ts.type = BT_DERIVED;
6505 p->ts.derived = extended;
6506 p->initializer = gfc_default_initializer (&p->ts);
6508 /* Provide the links between the extended type and its extension. */
6509 if (!extended->f2k_derived)
6510 extended->f2k_derived = gfc_get_namespace (NULL, 0);
6511 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
6515 /* Take over the ABSTRACT attribute. */
6516 sym->attr.abstract = attr.abstract;
6518 gfc_new_block = sym;
6524 /* Cray Pointees can be declared as:
6525 pointer (ipt, a (n,m,...,*))
6526 By default, this is treated as an AS_ASSUMED_SIZE array. We'll
6527 cheat and set a constant bound of 1 for the last dimension, if this
6528 is the case. Since there is no bounds-checking for Cray Pointees,
6529 this will be okay. */
6532 gfc_mod_pointee_as (gfc_array_spec *as)
6534 as->cray_pointee = true; /* This will be useful to know later. */
6535 if (as->type == AS_ASSUMED_SIZE)
6537 as->type = AS_EXPLICIT;
6538 as->upper[as->rank - 1] = gfc_int_expr (1);
6539 as->cp_was_assumed = true;
6541 else if (as->type == AS_ASSUMED_SHAPE)
6543 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
6550 /* Match the enum definition statement, here we are trying to match
6551 the first line of enum definition statement.
6552 Returns MATCH_YES if match is found. */
6555 gfc_match_enum (void)
6559 m = gfc_match_eos ();
6563 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
6571 /* Match a variable name with an optional initializer. When this
6572 subroutine is called, a variable is expected to be parsed next.
6573 Depending on what is happening at the moment, updates either the
6574 symbol table or the current interface. */
6577 enumerator_decl (void)
6579 char name[GFC_MAX_SYMBOL_LEN + 1];
6580 gfc_expr *initializer;
6581 gfc_array_spec *as = NULL;
6589 old_locus = gfc_current_locus;
6591 /* When we get here, we've just matched a list of attributes and
6592 maybe a type and a double colon. The next thing we expect to see
6593 is the name of the symbol. */
6594 m = gfc_match_name (name);
6598 var_locus = gfc_current_locus;
6600 /* OK, we've successfully matched the declaration. Now put the
6601 symbol in the current namespace. If we fail to create the symbol,
6603 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
6609 /* The double colon must be present in order to have initializers.
6610 Otherwise the statement is ambiguous with an assignment statement. */
6613 if (gfc_match_char ('=') == MATCH_YES)
6615 m = gfc_match_init_expr (&initializer);
6618 gfc_error ("Expected an initialization expression at %C");
6627 /* If we do not have an initializer, the initialization value of the
6628 previous enumerator (stored in last_initializer) is incremented
6629 by 1 and is used to initialize the current enumerator. */
6630 if (initializer == NULL)
6631 initializer = gfc_enum_initializer (last_initializer, old_locus);
6633 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
6635 gfc_error("ENUMERATOR %L not initialized with integer expression",
6638 gfc_free_enum_history ();
6642 /* Store this current initializer, for the next enumerator variable
6643 to be parsed. add_init_expr_to_sym() zeros initializer, so we
6644 use last_initializer below. */
6645 last_initializer = initializer;
6646 t = add_init_expr_to_sym (name, &initializer, &var_locus);
6648 /* Maintain enumerator history. */
6649 gfc_find_symbol (name, NULL, 0, &sym);
6650 create_enum_history (sym, last_initializer);
6652 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6655 /* Free stuff up and return. */
6656 gfc_free_expr (initializer);
6662 /* Match the enumerator definition statement. */
6665 gfc_match_enumerator_def (void)
6670 gfc_clear_ts (¤t_ts);
6672 m = gfc_match (" enumerator");
6676 m = gfc_match (" :: ");
6677 if (m == MATCH_ERROR)
6680 colon_seen = (m == MATCH_YES);
6682 if (gfc_current_state () != COMP_ENUM)
6684 gfc_error ("ENUM definition statement expected before %C");
6685 gfc_free_enum_history ();
6689 (¤t_ts)->type = BT_INTEGER;
6690 (¤t_ts)->kind = gfc_c_int_kind;
6692 gfc_clear_attr (¤t_attr);
6693 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
6702 m = enumerator_decl ();
6703 if (m == MATCH_ERROR)
6708 if (gfc_match_eos () == MATCH_YES)
6710 if (gfc_match_char (',') != MATCH_YES)
6714 if (gfc_current_state () == COMP_ENUM)
6716 gfc_free_enum_history ();
6717 gfc_error ("Syntax error in ENUMERATOR definition at %C");
6722 gfc_free_array_spec (current_as);
6729 /* Match binding attributes. */
6732 match_binding_attributes (gfc_typebound_proc* ba, bool generic)
6734 bool found_passing = false;
6737 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
6738 this case the defaults are in there. */
6739 ba->access = ACCESS_UNKNOWN;
6740 ba->pass_arg = NULL;
6741 ba->pass_arg_num = 0;
6743 ba->non_overridable = 0;
6746 /* If we find a comma, we believe there are binding attributes. */
6747 if (gfc_match_char (',') == MATCH_NO)
6749 ba->access = gfc_typebound_default_access;
6755 /* Access specifier. */
6757 m = gfc_match (" public");
6758 if (m == MATCH_ERROR)
6762 if (ba->access != ACCESS_UNKNOWN)
6764 gfc_error ("Duplicate access-specifier at %C");
6768 ba->access = ACCESS_PUBLIC;
6772 m = gfc_match (" private");
6773 if (m == MATCH_ERROR)
6777 if (ba->access != ACCESS_UNKNOWN)
6779 gfc_error ("Duplicate access-specifier at %C");
6783 ba->access = ACCESS_PRIVATE;
6787 /* If inside GENERIC, the following is not allowed. */
6792 m = gfc_match (" nopass");
6793 if (m == MATCH_ERROR)
6799 gfc_error ("Binding attributes already specify passing,"
6800 " illegal NOPASS at %C");
6804 found_passing = true;
6809 /* NON_OVERRIDABLE flag. */
6810 m = gfc_match (" non_overridable");
6811 if (m == MATCH_ERROR)
6815 if (ba->non_overridable)
6817 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
6821 ba->non_overridable = 1;
6825 /* DEFERRED flag. */
6826 m = gfc_match (" deferred");
6827 if (m == MATCH_ERROR)
6833 gfc_error ("Duplicate DEFERRED at %C");
6841 /* PASS possibly including argument. */
6842 m = gfc_match (" pass");
6843 if (m == MATCH_ERROR)
6847 char arg[GFC_MAX_SYMBOL_LEN + 1];
6851 gfc_error ("Binding attributes already specify passing,"
6852 " illegal PASS at %C");
6856 m = gfc_match (" ( %n )", arg);
6857 if (m == MATCH_ERROR)
6860 ba->pass_arg = xstrdup (arg);
6861 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
6863 found_passing = true;
6870 /* Nothing matching found. */
6872 gfc_error ("Expected access-specifier at %C");
6874 gfc_error ("Expected binding attribute at %C");
6877 while (gfc_match_char (',') == MATCH_YES);
6879 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
6880 if (ba->non_overridable && ba->deferred)
6882 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
6886 if (ba->access == ACCESS_UNKNOWN)
6887 ba->access = gfc_typebound_default_access;
6892 gfc_free (ba->pass_arg);
6897 /* Match a PROCEDURE specific binding inside a derived type. */
6900 match_procedure_in_type (void)
6902 char name[GFC_MAX_SYMBOL_LEN + 1];
6903 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
6904 char* target = NULL;
6905 gfc_typebound_proc* tb;
6913 /* Check current state. */
6914 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
6915 block = gfc_state_stack->previous->sym;
6918 /* Try to match PROCEDURE(interface). */
6919 if (gfc_match (" (") == MATCH_YES)
6921 m = gfc_match_name (target_buf);
6922 if (m == MATCH_ERROR)
6926 gfc_error ("Interface-name expected after '(' at %C");
6930 if (gfc_match (" )") != MATCH_YES)
6932 gfc_error ("')' expected at %C");
6936 target = target_buf;
6939 /* Construct the data structure. */
6940 tb = gfc_get_typebound_proc ();
6941 tb->where = gfc_current_locus;
6944 /* Match binding attributes. */
6945 m = match_binding_attributes (tb, false);
6946 if (m == MATCH_ERROR)
6948 seen_attrs = (m == MATCH_YES);
6950 /* Check that attribute DEFERRED is given iff an interface is specified, which
6951 means target != NULL. */
6952 if (tb->deferred && !target)
6954 gfc_error ("Interface must be specified for DEFERRED binding at %C");
6957 if (target && !tb->deferred)
6959 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
6963 /* Match the colons. */
6964 m = gfc_match (" ::");
6965 if (m == MATCH_ERROR)
6967 seen_colons = (m == MATCH_YES);
6968 if (seen_attrs && !seen_colons)
6970 gfc_error ("Expected '::' after binding-attributes at %C");
6974 /* Match the binding name. */
6975 m = gfc_match_name (name);
6976 if (m == MATCH_ERROR)
6980 gfc_error ("Expected binding name at %C");
6984 /* Try to match the '=> target', if it's there. */
6985 m = gfc_match (" =>");
6986 if (m == MATCH_ERROR)
6992 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
6998 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7003 m = gfc_match_name (target_buf);
7004 if (m == MATCH_ERROR)
7008 gfc_error ("Expected binding target after '=>' at %C");
7011 target = target_buf;
7014 /* Now we should have the end. */
7015 m = gfc_match_eos ();
7016 if (m == MATCH_ERROR)
7020 gfc_error ("Junk after PROCEDURE declaration at %C");
7024 /* If no target was found, it has the same name as the binding. */
7028 /* Get the namespace to insert the symbols into. */
7029 ns = block->f2k_derived;
7032 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7033 if (tb->deferred && !block->attr.abstract)
7035 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7040 /* See if we already have a binding with this name in the symtree which would
7041 be an error. If a GENERIC already targetted this binding, it may be
7042 already there but then typebound is still NULL. */
7043 stree = gfc_find_symtree (ns->sym_root, name);
7044 if (stree && stree->typebound)
7046 gfc_error ("There's already a procedure with binding name '%s' for the"
7047 " derived type '%s' at %C", name, block->name);
7051 /* Insert it and set attributes. */
7052 if (gfc_get_sym_tree (name, ns, &stree))
7054 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific))
7056 gfc_set_sym_referenced (tb->u.specific->n.sym);
7057 stree->typebound = tb;
7063 /* Match a GENERIC procedure binding inside a derived type. */
7066 gfc_match_generic (void)
7068 char name[GFC_MAX_SYMBOL_LEN + 1];
7070 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7071 gfc_typebound_proc* tb;
7076 /* Check current state. */
7077 if (gfc_current_state () == COMP_DERIVED)
7079 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7082 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7084 block = gfc_state_stack->previous->sym;
7085 ns = block->f2k_derived;
7086 gcc_assert (block && ns);
7088 /* See if we get an access-specifier. */
7089 m = match_binding_attributes (&tbattr, true);
7090 if (m == MATCH_ERROR)
7093 /* Now the colons, those are required. */
7094 if (gfc_match (" ::") != MATCH_YES)
7096 gfc_error ("Expected '::' at %C");
7100 /* The binding name and =>. */
7101 m = gfc_match (" %n =>", name);
7102 if (m == MATCH_ERROR)
7106 gfc_error ("Expected generic name at %C");
7110 /* If there's already something with this name, check that it is another
7111 GENERIC and then extend that rather than build a new node. */
7112 st = gfc_find_symtree (ns->sym_root, name);
7115 if (!st->typebound || !st->typebound->is_generic)
7117 gfc_error ("There's already a non-generic procedure with binding name"
7118 " '%s' for the derived type '%s' at %C",
7124 if (tb->access != tbattr.access)
7126 gfc_error ("Binding at %C must have the same access as already"
7127 " defined binding '%s'", name);
7133 if (gfc_get_sym_tree (name, ns, &st))
7136 st->typebound = tb = gfc_get_typebound_proc ();
7137 tb->where = gfc_current_locus;
7138 tb->access = tbattr.access;
7140 tb->u.generic = NULL;
7143 /* Now, match all following names as specific targets. */
7146 gfc_symtree* target_st;
7147 gfc_tbp_generic* target;
7149 m = gfc_match_name (name);
7150 if (m == MATCH_ERROR)
7154 gfc_error ("Expected specific binding name at %C");
7158 if (gfc_get_sym_tree (name, ns, &target_st))
7161 /* See if this is a duplicate specification. */
7162 for (target = tb->u.generic; target; target = target->next)
7163 if (target_st == target->specific_st)
7165 gfc_error ("'%s' already defined as specific binding for the"
7166 " generic '%s' at %C", name, st->n.sym->name);
7170 gfc_set_sym_referenced (target_st->n.sym);
7172 target = gfc_get_tbp_generic ();
7173 target->specific_st = target_st;
7174 target->specific = NULL;
7175 target->next = tb->u.generic;
7176 tb->u.generic = target;
7178 while (gfc_match (" ,") == MATCH_YES);
7180 /* Here should be the end. */
7181 if (gfc_match_eos () != MATCH_YES)
7183 gfc_error ("Junk after GENERIC binding at %C");
7194 /* Match a FINAL declaration inside a derived type. */
7197 gfc_match_final_decl (void)
7199 char name[GFC_MAX_SYMBOL_LEN + 1];
7202 gfc_namespace* module_ns;
7206 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7208 gfc_error ("FINAL declaration at %C must be inside a derived type "
7209 "CONTAINS section");
7213 block = gfc_state_stack->previous->sym;
7216 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7217 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7219 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7220 " specification part of a MODULE");
7224 module_ns = gfc_current_ns;
7225 gcc_assert (module_ns);
7226 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7228 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7229 if (gfc_match (" ::") == MATCH_ERROR)
7232 /* Match the sequence of procedure names. */
7239 if (first && gfc_match_eos () == MATCH_YES)
7241 gfc_error ("Empty FINAL at %C");
7245 m = gfc_match_name (name);
7248 gfc_error ("Expected module procedure name at %C");
7251 else if (m != MATCH_YES)
7254 if (gfc_match_eos () == MATCH_YES)
7256 if (!last && gfc_match_char (',') != MATCH_YES)
7258 gfc_error ("Expected ',' at %C");
7262 if (gfc_get_symbol (name, module_ns, &sym))
7264 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7268 /* Mark the symbol as module procedure. */
7269 if (sym->attr.proc != PROC_MODULE
7270 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7271 sym->name, NULL) == FAILURE)
7274 /* Check if we already have this symbol in the list, this is an error. */
7275 for (f = block->f2k_derived->finalizers; f; f = f->next)
7276 if (f->proc_sym == sym)
7278 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
7283 /* Add this symbol to the list of finalizers. */
7284 gcc_assert (block->f2k_derived);
7286 f = XCNEW (gfc_finalizer);
7288 f->proc_tree = NULL;
7289 f->where = gfc_current_locus;
7290 f->next = block->f2k_derived->finalizers;
7291 block->f2k_derived->finalizers = f;