1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
28 #include "constructor.h"
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts;
49 static symbol_attribute current_attr;
50 static gfc_array_spec *current_as;
51 static int colon_seen;
53 /* The current binding label (if any). */
54 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals = 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr *last_initializer;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr *initializer;
74 struct enumerator_history *next;
78 /* Header of enum history chain. */
80 static enumerator_history *enum_history = NULL;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history *max_enum = NULL;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol *gfc_new_block;
90 bool gfc_matching_function;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data = false;
98 gfc_in_match_data (void)
100 return in_match_data;
104 set_in_match_data (bool set_value)
106 in_match_data = set_value;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable *p)
114 gfc_data_variable *q;
119 gfc_free_expr (p->expr);
120 gfc_free_iterator (&p->iter, 0);
121 free_variable (p->list);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value *p)
137 gfc_free_expr (p->expr);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data *p)
153 free_variable (p->var);
154 free_value (p->value);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace *ns)
176 static match var_element (gfc_data_variable *);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable *parent)
184 gfc_data_variable *tail, var;
187 m = var_element (&var);
188 if (m == MATCH_ERROR)
193 tail = gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES)
203 m = gfc_match_iterator (&parent->iter, 1);
206 if (m == MATCH_ERROR)
209 m = var_element (&var);
210 if (m == MATCH_ERROR)
215 tail->next = gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES)
226 gfc_syntax_error (ST_DATA);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable *new_var)
240 memset (new_var, 0, sizeof (gfc_data_variable));
242 if (gfc_match_char ('(') == MATCH_YES)
243 return var_list (new_var);
245 m = gfc_match_variable (&new_var->expr, 0);
249 sym = new_var->expr->symtree->n.sym;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym, gfc_current_ns,
253 false, gfc_current_locus) == FAILURE)
256 if (!sym->attr.function && gfc_current_ns->parent
257 && gfc_current_ns->parent == sym->ns)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym->name);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym->attr.in_common
266 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym->name) == FAILURE)
271 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data *d)
283 gfc_data_variable var, *tail, *new_var;
290 m = var_element (&var);
293 if (m == MATCH_ERROR)
296 new_var = gfc_get_data_variable ();
302 tail->next = new_var;
306 if (gfc_match_char ('/') == MATCH_YES)
308 if (gfc_match_char (',') != MATCH_YES)
315 gfc_syntax_error (ST_DATA);
316 gfc_free_data_all (gfc_current_ns);
322 match_data_constant (gfc_expr **result)
324 char name[GFC_MAX_SYMBOL_LEN + 1];
330 m = gfc_match_literal_constant (&expr, 1);
337 if (m == MATCH_ERROR)
340 m = gfc_match_null (result);
344 old_loc = gfc_current_locus;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m = gfc_match_rvalue (result);
349 if (m == MATCH_ERROR)
352 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
354 if (gfc_simplify_expr (*result, 0) == FAILURE)
359 gfc_current_locus = old_loc;
361 m = gfc_match_name (name);
365 if (gfc_find_symbol (name, NULL, 1, &sym))
369 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym->attr.flavor == FL_DERIVED)
376 return gfc_match_structure_constructor (sym, result, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym->value->expr_type == EXPR_ARRAY)
381 gfc_current_locus = old_loc;
383 m = gfc_match_init_expr (result);
384 if (m == MATCH_ERROR)
389 if (gfc_simplify_expr (*result, 0) == FAILURE)
392 if ((*result)->expr_type == EXPR_CONSTANT)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name);
402 *result = gfc_copy_expr (sym->value);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data *data)
413 gfc_data_value *new_val, *tail;
421 m = match_data_constant (&expr);
424 if (m == MATCH_ERROR)
427 new_val = gfc_get_data_value ();
428 mpz_init (new_val->repeat);
431 data->value = new_val;
433 tail->next = new_val;
437 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
440 mpz_set_ui (tail->repeat, 1);
444 if (expr->ts.type == BT_INTEGER)
445 mpz_set (tail->repeat, expr->value.integer);
446 gfc_free_expr (expr);
448 m = match_data_constant (&tail->expr);
451 if (m == MATCH_ERROR)
455 if (gfc_match_char ('/') == MATCH_YES)
457 if (gfc_match_char (',') == MATCH_NO)
464 gfc_syntax_error (ST_DATA);
465 gfc_free_data_all (gfc_current_ns);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name, NULL, 0, &st);
484 newdata = gfc_get_data ();
485 newdata->var = gfc_get_data_variable ();
486 newdata->var->expr = gfc_get_variable_expr (st);
487 newdata->where = gfc_current_locus;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m = top_val_list (newdata);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
511 /* Chain in namespace list of DATA initializers. */
512 newdata->next = gfc_current_ns->data;
513 gfc_current_ns->data = newdata;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data = gfc_get_data ();
535 new_data->where = gfc_current_locus;
537 m = top_var_list (new_data);
541 m = top_val_list (new_data);
545 new_data->next = gfc_current_ns->data;
546 gfc_current_ns->data = new_data;
548 if (gfc_match_eos () == MATCH_YES)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data);
571 /************************ Declaration statements *********************/
574 /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */
577 merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy)
581 if (to->rank == 0 && from->rank > 0)
583 to->rank = from->rank;
584 to->type = from->type;
585 to->cray_pointee = from->cray_pointee;
586 to->cp_was_assumed = from->cp_was_assumed;
588 for (i = 0; i < to->corank; i++)
590 to->lower[from->rank + i] = to->lower[i];
591 to->upper[from->rank + i] = to->upper[i];
593 for (i = 0; i < from->rank; i++)
597 to->lower[i] = gfc_copy_expr (from->lower[i]);
598 to->upper[i] = gfc_copy_expr (from->upper[i]);
602 to->lower[i] = from->lower[i];
603 to->upper[i] = from->upper[i];
607 else if (to->corank == 0 && from->corank > 0)
609 to->corank = from->corank;
610 to->cotype = from->cotype;
612 for (i = 0; i < from->corank; i++)
616 to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]);
617 to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]);
621 to->lower[to->rank + i] = from->lower[i];
622 to->upper[to->rank + i] = from->upper[i];
629 /* Match an intent specification. Since this can only happen after an
630 INTENT word, a legal intent-spec must follow. */
633 match_intent_spec (void)
636 if (gfc_match (" ( in out )") == MATCH_YES)
638 if (gfc_match (" ( in )") == MATCH_YES)
640 if (gfc_match (" ( out )") == MATCH_YES)
643 gfc_error ("Bad INTENT specification at %C");
644 return INTENT_UNKNOWN;
648 /* Matches a character length specification, which is either a
649 specification expression or a '*'. */
652 char_len_param_value (gfc_expr **expr)
656 if (gfc_match_char ('*') == MATCH_YES)
662 m = gfc_match_expr (expr);
665 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
668 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
670 if ((*expr)->value.function.actual
671 && (*expr)->value.function.actual->expr->symtree)
674 e = (*expr)->value.function.actual->expr;
675 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
676 && e->expr_type == EXPR_VARIABLE)
678 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
680 if (e->symtree->n.sym->ts.type == BT_CHARACTER
681 && e->symtree->n.sym->ts.u.cl
682 && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN)
690 gfc_error ("Conflict in attributes of function argument at %C");
695 /* A character length is a '*' followed by a literal integer or a
696 char_len_param_value in parenthesis. */
699 match_char_length (gfc_expr **expr)
704 m = gfc_match_char ('*');
708 m = gfc_match_small_literal_int (&length, NULL);
709 if (m == MATCH_ERROR)
714 if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
715 "Old-style character length at %C") == FAILURE)
717 *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length);
721 if (gfc_match_char ('(') == MATCH_NO)
724 m = char_len_param_value (expr);
725 if (m != MATCH_YES && gfc_matching_function)
731 if (m == MATCH_ERROR)
736 if (gfc_match_char (')') == MATCH_NO)
738 gfc_free_expr (*expr);
746 gfc_error ("Syntax error in character length specification at %C");
751 /* Special subroutine for finding a symbol. Check if the name is found
752 in the current name space. If not, and we're compiling a function or
753 subroutine and the parent compilation unit is an interface, then check
754 to see if the name we've been given is the name of the interface
755 (located in another namespace). */
758 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
764 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
767 *result = st ? st->n.sym : NULL;
771 if (gfc_current_state () != COMP_SUBROUTINE
772 && gfc_current_state () != COMP_FUNCTION)
775 s = gfc_state_stack->previous;
779 if (s->state != COMP_INTERFACE)
782 goto end; /* Nameless interface. */
784 if (strcmp (name, s->sym->name) == 0)
795 /* Special subroutine for getting a symbol node associated with a
796 procedure name, used in SUBROUTINE and FUNCTION statements. The
797 symbol is created in the parent using with symtree node in the
798 child unit pointing to the symbol. If the current namespace has no
799 parent, then the symbol is just created in the current unit. */
802 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
808 /* Module functions have to be left in their own namespace because
809 they have potentially (almost certainly!) already been referenced.
810 In this sense, they are rather like external functions. This is
811 fixed up in resolve.c(resolve_entries), where the symbol name-
812 space is set to point to the master function, so that the fake
813 result mechanism can work. */
814 if (module_fcn_entry)
816 /* Present if entry is declared to be a module procedure. */
817 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
820 rc = gfc_get_symbol (name, NULL, result);
821 else if (!gfc_get_symbol (name, NULL, &sym) && sym
822 && (*result)->ts.type == BT_UNKNOWN
823 && sym->attr.flavor == FL_UNKNOWN)
824 /* Pick up the typespec for the entry, if declared in the function
825 body. Note that this symbol is FL_UNKNOWN because it will
826 only have appeared in a type declaration. The local symtree
827 is set to point to the module symbol and a unique symtree
828 to the local version. This latter ensures a correct clearing
831 /* If the ENTRY proceeds its specification, we need to ensure
832 that this does not raise a "has no IMPLICIT type" error. */
833 if (sym->ts.type == BT_UNKNOWN)
834 sym->attr.untyped = 1;
836 (*result)->ts = sym->ts;
838 /* Put the symbol in the procedure namespace so that, should
839 the ENTRY precede its specification, the specification
841 (*result)->ns = gfc_current_ns;
843 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
845 st = gfc_get_unique_symtree (gfc_current_ns);
850 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
856 gfc_current_ns->refs++;
858 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
860 /* Trap another encompassed procedure with the same name. All
861 these conditions are necessary to avoid picking up an entry
862 whose name clashes with that of the encompassing procedure;
863 this is handled using gsymbols to register unique,globally
865 if (sym->attr.flavor != 0
866 && sym->attr.proc != 0
867 && (sym->attr.subroutine || sym->attr.function)
868 && sym->attr.if_source != IFSRC_UNKNOWN)
869 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
870 name, &sym->declared_at);
872 /* Trap a procedure with a name the same as interface in the
873 encompassing scope. */
874 if (sym->attr.generic != 0
875 && (sym->attr.subroutine || sym->attr.function)
876 && !sym->attr.mod_proc)
877 gfc_error_now ("Name '%s' at %C is already defined"
878 " as a generic interface at %L",
879 name, &sym->declared_at);
881 /* Trap declarations of attributes in encompassing scope. The
882 signature for this is that ts.kind is set. Legitimate
883 references only set ts.type. */
884 if (sym->ts.kind != 0
885 && !sym->attr.implicit_type
886 && sym->attr.proc == 0
887 && gfc_current_ns->parent != NULL
888 && sym->attr.access == 0
889 && !module_fcn_entry)
890 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
891 "and must not have attributes declared at %L",
892 name, &sym->declared_at);
895 if (gfc_current_ns->parent == NULL || *result == NULL)
898 /* Module function entries will already have a symtree in
899 the current namespace but will need one at module level. */
900 if (module_fcn_entry)
902 /* Present if entry is declared to be a module procedure. */
903 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
905 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
908 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
913 /* See if the procedure should be a module procedure. */
915 if (((sym->ns->proc_name != NULL
916 && sym->ns->proc_name->attr.flavor == FL_MODULE
917 && sym->attr.proc != PROC_MODULE)
918 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
919 && gfc_add_procedure (&sym->attr, PROC_MODULE,
920 sym->name, NULL) == FAILURE)
927 /* Verify that the given symbol representing a parameter is C
928 interoperable, by checking to see if it was marked as such after
929 its declaration. If the given symbol is not interoperable, a
930 warning is reported, thus removing the need to return the status to
931 the calling function. The standard does not require the user use
932 one of the iso_c_binding named constants to declare an
933 interoperable parameter, but we can't be sure if the param is C
934 interop or not if the user doesn't. For example, integer(4) may be
935 legal Fortran, but doesn't have meaning in C. It may interop with
936 a number of the C types, which causes a problem because the
937 compiler can't know which one. This code is almost certainly not
938 portable, and the user will get what they deserve if the C type
939 across platforms isn't always interoperable with integer(4). If
940 the user had used something like integer(c_int) or integer(c_long),
941 the compiler could have automatically handled the varying sizes
945 verify_c_interop_param (gfc_symbol *sym)
947 int is_c_interop = 0;
948 gfc_try retval = SUCCESS;
950 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
951 Don't repeat the checks here. */
952 if (sym->attr.implicit_type)
955 /* For subroutines or functions that are passed to a BIND(C) procedure,
956 they're interoperable if they're BIND(C) and their params are all
958 if (sym->attr.flavor == FL_PROCEDURE)
960 if (sym->attr.is_bind_c == 0)
962 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
963 "attribute to be C interoperable", sym->name,
964 &(sym->declared_at));
970 if (sym->attr.is_c_interop == 1)
971 /* We've already checked this procedure; don't check it again. */
974 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
979 /* See if we've stored a reference to a procedure that owns sym. */
980 if (sym->ns != NULL && sym->ns->proc_name != NULL)
982 if (sym->ns->proc_name->attr.is_bind_c == 1)
985 (verify_c_interop (&(sym->ts))
988 if (is_c_interop != 1)
990 /* Make personalized messages to give better feedback. */
991 if (sym->ts.type == BT_DERIVED)
992 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
993 " procedure '%s' but is not C interoperable "
994 "because derived type '%s' is not C interoperable",
995 sym->name, &(sym->declared_at),
996 sym->ns->proc_name->name,
997 sym->ts.u.derived->name);
999 gfc_warning ("Variable '%s' at %L is a parameter to the "
1000 "BIND(C) procedure '%s' but may not be C "
1002 sym->name, &(sym->declared_at),
1003 sym->ns->proc_name->name);
1006 /* Character strings are only C interoperable if they have a
1008 if (sym->ts.type == BT_CHARACTER)
1010 gfc_charlen *cl = sym->ts.u.cl;
1011 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
1012 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
1014 gfc_error ("Character argument '%s' at %L "
1015 "must be length 1 because "
1016 "procedure '%s' is BIND(C)",
1017 sym->name, &sym->declared_at,
1018 sym->ns->proc_name->name);
1023 /* We have to make sure that any param to a bind(c) routine does
1024 not have the allocatable, pointer, or optional attributes,
1025 according to J3/04-007, section 5.1. */
1026 if (sym->attr.allocatable == 1)
1028 gfc_error ("Variable '%s' at %L cannot have the "
1029 "ALLOCATABLE attribute because procedure '%s'"
1030 " is BIND(C)", sym->name, &(sym->declared_at),
1031 sym->ns->proc_name->name);
1035 if (sym->attr.pointer == 1)
1037 gfc_error ("Variable '%s' at %L cannot have the "
1038 "POINTER attribute because procedure '%s'"
1039 " is BIND(C)", sym->name, &(sym->declared_at),
1040 sym->ns->proc_name->name);
1044 if (sym->attr.optional == 1)
1046 gfc_error ("Variable '%s' at %L cannot have the "
1047 "OPTIONAL attribute because procedure '%s'"
1048 " is BIND(C)", sym->name, &(sym->declared_at),
1049 sym->ns->proc_name->name);
1053 /* Make sure that if it has the dimension attribute, that it is
1054 either assumed size or explicit shape. */
1055 if (sym->as != NULL)
1057 if (sym->as->type == AS_ASSUMED_SHAPE)
1059 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1060 "argument to the procedure '%s' at %L because "
1061 "the procedure is BIND(C)", sym->name,
1062 &(sym->declared_at), sym->ns->proc_name->name,
1063 &(sym->ns->proc_name->declared_at));
1067 if (sym->as->type == AS_DEFERRED)
1069 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1070 "argument to the procedure '%s' at %L because "
1071 "the procedure is BIND(C)", sym->name,
1072 &(sym->declared_at), sym->ns->proc_name->name,
1073 &(sym->ns->proc_name->declared_at));
1085 /* Function called by variable_decl() that adds a name to the symbol table. */
1088 build_sym (const char *name, gfc_charlen *cl,
1089 gfc_array_spec **as, locus *var_locus)
1091 symbol_attribute attr;
1094 if (gfc_get_symbol (name, NULL, &sym))
1097 /* Start updating the symbol table. Add basic type attribute if present. */
1098 if (current_ts.type != BT_UNKNOWN
1099 && (sym->attr.implicit_type == 0
1100 || !gfc_compare_types (&sym->ts, ¤t_ts))
1101 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1104 if (sym->ts.type == BT_CHARACTER)
1107 /* Add dimension attribute if present. */
1108 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1112 /* Add attribute to symbol. The copy is so that we can reset the
1113 dimension attribute. */
1114 attr = current_attr;
1116 attr.codimension = 0;
1118 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1121 /* Finish any work that may need to be done for the binding label,
1122 if it's a bind(c). The bind(c) attr is found before the symbol
1123 is made, and before the symbol name (for data decls), so the
1124 current_ts is holding the binding label, or nothing if the
1125 name= attr wasn't given. Therefore, test here if we're dealing
1126 with a bind(c) and make sure the binding label is set correctly. */
1127 if (sym->attr.is_bind_c == 1)
1129 if (sym->binding_label[0] == '\0')
1131 /* Set the binding label and verify that if a NAME= was specified
1132 then only one identifier was in the entity-decl-list. */
1133 if (set_binding_label (sym->binding_label, sym->name,
1134 num_idents_on_line) == FAILURE)
1139 /* See if we know we're in a common block, and if it's a bind(c)
1140 common then we need to make sure we're an interoperable type. */
1141 if (sym->attr.in_common == 1)
1143 /* Test the common block object. */
1144 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1145 && sym->ts.is_c_interop != 1)
1147 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1148 "must be declared with a C interoperable "
1149 "kind since common block '%s' is BIND(C)",
1150 sym->name, sym->common_block->name,
1151 sym->common_block->name);
1156 sym->attr.implied_index = 0;
1158 if (sym->ts.type == BT_CLASS
1159 && (sym->attr.class_ok = sym->attr.dummy || sym->attr.pointer
1160 || sym->attr.allocatable))
1161 gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false);
1167 /* Set character constant to the given length. The constant will be padded or
1168 truncated. If we're inside an array constructor without a typespec, we
1169 additionally check that all elements have the same length; check_len -1
1170 means no checking. */
1173 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1178 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1179 gcc_assert (expr->ts.type == BT_CHARACTER);
1181 slen = expr->value.character.length;
1184 s = gfc_get_wide_string (len + 1);
1185 memcpy (s, expr->value.character.string,
1186 MIN (len, slen) * sizeof (gfc_char_t));
1188 gfc_wide_memset (&s[slen], ' ', len - slen);
1190 if (gfc_option.warn_character_truncation && slen > len)
1191 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1192 "(%d/%d)", &expr->where, slen, len);
1194 /* Apply the standard by 'hand' otherwise it gets cleared for
1196 if (check_len != -1 && slen != check_len
1197 && !(gfc_option.allow_std & GFC_STD_GNU))
1198 gfc_error_now ("The CHARACTER elements of the array constructor "
1199 "at %L must have the same length (%d/%d)",
1200 &expr->where, slen, check_len);
1203 gfc_free (expr->value.character.string);
1204 expr->value.character.string = s;
1205 expr->value.character.length = len;
1210 /* Function to create and update the enumerator history
1211 using the information passed as arguments.
1212 Pointer "max_enum" is also updated, to point to
1213 enum history node containing largest initializer.
1215 SYM points to the symbol node of enumerator.
1216 INIT points to its enumerator value. */
1219 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1221 enumerator_history *new_enum_history;
1222 gcc_assert (sym != NULL && init != NULL);
1224 new_enum_history = XCNEW (enumerator_history);
1226 new_enum_history->sym = sym;
1227 new_enum_history->initializer = init;
1228 new_enum_history->next = NULL;
1230 if (enum_history == NULL)
1232 enum_history = new_enum_history;
1233 max_enum = enum_history;
1237 new_enum_history->next = enum_history;
1238 enum_history = new_enum_history;
1240 if (mpz_cmp (max_enum->initializer->value.integer,
1241 new_enum_history->initializer->value.integer) < 0)
1242 max_enum = new_enum_history;
1247 /* Function to free enum kind history. */
1250 gfc_free_enum_history (void)
1252 enumerator_history *current = enum_history;
1253 enumerator_history *next;
1255 while (current != NULL)
1257 next = current->next;
1262 enum_history = NULL;
1266 /* Function called by variable_decl() that adds an initialization
1267 expression to a symbol. */
1270 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1272 symbol_attribute attr;
1277 if (find_special (name, &sym, false))
1282 /* If this symbol is confirming an implicit parameter type,
1283 then an initialization expression is not allowed. */
1284 if (attr.flavor == FL_PARAMETER
1285 && sym->value != NULL
1288 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1295 /* An initializer is required for PARAMETER declarations. */
1296 if (attr.flavor == FL_PARAMETER)
1298 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1304 /* If a variable appears in a DATA block, it cannot have an
1308 gfc_error ("Variable '%s' at %C with an initializer already "
1309 "appears in a DATA statement", sym->name);
1313 /* Check if the assignment can happen. This has to be put off
1314 until later for a derived type variable. */
1315 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1316 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1317 && gfc_check_assign_symbol (sym, init) == FAILURE)
1320 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1321 && init->ts.type == BT_CHARACTER)
1323 /* Update symbol character length according initializer. */
1324 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1327 if (sym->ts.u.cl->length == NULL)
1330 /* If there are multiple CHARACTER variables declared on the
1331 same line, we don't want them to share the same length. */
1332 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1334 if (sym->attr.flavor == FL_PARAMETER)
1336 if (init->expr_type == EXPR_CONSTANT)
1338 clen = init->value.character.length;
1339 sym->ts.u.cl->length
1340 = gfc_get_int_expr (gfc_default_integer_kind,
1343 else if (init->expr_type == EXPR_ARRAY)
1346 c = gfc_constructor_first (init->value.constructor);
1347 clen = c->expr->value.character.length;
1348 sym->ts.u.cl->length
1349 = gfc_get_int_expr (gfc_default_integer_kind,
1352 else if (init->ts.u.cl && init->ts.u.cl->length)
1353 sym->ts.u.cl->length =
1354 gfc_copy_expr (sym->value->ts.u.cl->length);
1357 /* Update initializer character length according symbol. */
1358 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1360 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1362 if (init->expr_type == EXPR_CONSTANT)
1363 gfc_set_constant_character_len (len, init, -1);
1364 else if (init->expr_type == EXPR_ARRAY)
1368 /* Build a new charlen to prevent simplification from
1369 deleting the length before it is resolved. */
1370 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1371 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1373 for (c = gfc_constructor_first (init->value.constructor);
1374 c; c = gfc_constructor_next (c))
1375 gfc_set_constant_character_len (len, c->expr, -1);
1380 /* Need to check if the expression we initialized this
1381 to was one of the iso_c_binding named constants. If so,
1382 and we're a parameter (constant), let it be iso_c.
1384 integer(c_int), parameter :: my_int = c_int
1385 integer(my_int) :: my_int_2
1386 If we mark my_int as iso_c (since we can see it's value
1387 is equal to one of the named constants), then my_int_2
1388 will be considered C interoperable. */
1389 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1391 sym->ts.is_iso_c |= init->ts.is_iso_c;
1392 sym->ts.is_c_interop |= init->ts.is_c_interop;
1393 /* attr bits needed for module files. */
1394 sym->attr.is_iso_c |= init->ts.is_iso_c;
1395 sym->attr.is_c_interop |= init->ts.is_c_interop;
1396 if (init->ts.is_iso_c)
1397 sym->ts.f90_type = init->ts.f90_type;
1400 /* Add initializer. Make sure we keep the ranks sane. */
1401 if (sym->attr.dimension && init->rank == 0)
1406 if (sym->attr.flavor == FL_PARAMETER
1407 && init->expr_type == EXPR_CONSTANT
1408 && spec_size (sym->as, &size) == SUCCESS
1409 && mpz_cmp_si (size, 0) > 0)
1411 array = gfc_get_array_expr (init->ts.type, init->ts.kind,
1413 for (n = 0; n < (int)mpz_get_si (size); n++)
1414 gfc_constructor_append_expr (&array->value.constructor,
1417 : gfc_copy_expr (init),
1420 array->shape = gfc_get_shape (sym->as->rank);
1421 for (n = 0; n < sym->as->rank; n++)
1422 spec_dimen_size (sym->as, n, &array->shape[n]);
1427 init->rank = sym->as->rank;
1431 if (sym->attr.save == SAVE_NONE)
1432 sym->attr.save = SAVE_IMPLICIT;
1440 /* Function called by variable_decl() that adds a name to a structure
1444 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1445 gfc_array_spec **as)
1448 gfc_try t = SUCCESS;
1450 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1451 constructing, it must have the pointer attribute. */
1452 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1453 && current_ts.u.derived == gfc_current_block ()
1454 && current_attr.pointer == 0)
1456 gfc_error ("Component at %C must have the POINTER attribute");
1460 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1462 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1464 gfc_error ("Array component of structure at %C must have explicit "
1465 "or deferred shape");
1470 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1474 if (c->ts.type == BT_CHARACTER)
1476 c->attr = current_attr;
1478 c->initializer = *init;
1485 c->attr.codimension = 1;
1487 c->attr.dimension = 1;
1491 /* Should this ever get more complicated, combine with similar section
1492 in add_init_expr_to_sym into a separate function. */
1493 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1494 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1498 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1499 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1500 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1502 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1504 if (c->initializer->expr_type == EXPR_CONSTANT)
1505 gfc_set_constant_character_len (len, c->initializer, -1);
1506 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1507 c->initializer->ts.u.cl->length->value.integer))
1509 gfc_constructor *ctor;
1510 ctor = gfc_constructor_first (c->initializer->value.constructor);
1515 bool has_ts = (c->initializer->ts.u.cl
1516 && c->initializer->ts.u.cl->length_from_typespec);
1518 /* Remember the length of the first element for checking
1519 that all elements *in the constructor* have the same
1520 length. This need not be the length of the LHS! */
1521 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1522 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1523 first_len = ctor->expr->value.character.length;
1525 for ( ; ctor; ctor = gfc_constructor_next (ctor))
1526 if (ctor->expr->expr_type == EXPR_CONSTANT)
1528 gfc_set_constant_character_len (len, ctor->expr,
1529 has_ts ? -1 : first_len);
1530 ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length);
1536 /* Check array components. */
1537 if (!c->attr.dimension)
1540 if (c->attr.pointer)
1542 if (c->as->type != AS_DEFERRED)
1544 gfc_error ("Pointer array component of structure at %C must have a "
1549 else if (c->attr.allocatable)
1551 if (c->as->type != AS_DEFERRED)
1553 gfc_error ("Allocatable component of structure at %C must have a "
1560 if (c->as->type != AS_EXPLICIT)
1562 gfc_error ("Array component of structure at %C must have an "
1569 if (c->ts.type == BT_CLASS)
1570 gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true);
1576 /* Match a 'NULL()', and possibly take care of some side effects. */
1579 gfc_match_null (gfc_expr **result)
1584 m = gfc_match (" null ( )");
1588 /* The NULL symbol now has to be/become an intrinsic function. */
1589 if (gfc_get_symbol ("null", NULL, &sym))
1591 gfc_error ("NULL() initialization at %C is ambiguous");
1595 gfc_intrinsic_symbol (sym);
1597 if (sym->attr.proc != PROC_INTRINSIC
1598 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1599 sym->name, NULL) == FAILURE
1600 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1603 *result = gfc_get_null_expr (&gfc_current_locus);
1609 /* Match a variable name with an optional initializer. When this
1610 subroutine is called, a variable is expected to be parsed next.
1611 Depending on what is happening at the moment, updates either the
1612 symbol table or the current interface. */
1615 variable_decl (int elem)
1617 char name[GFC_MAX_SYMBOL_LEN + 1];
1618 gfc_expr *initializer, *char_len;
1620 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1631 /* When we get here, we've just matched a list of attributes and
1632 maybe a type and a double colon. The next thing we expect to see
1633 is the name of the symbol. */
1634 m = gfc_match_name (name);
1638 var_locus = gfc_current_locus;
1640 /* Now we could see the optional array spec. or character length. */
1641 m = gfc_match_array_spec (&as, true, true);
1642 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1643 cp_as = gfc_copy_array_spec (as);
1644 else if (m == MATCH_ERROR)
1648 as = gfc_copy_array_spec (current_as);
1649 else if (current_as)
1650 merge_array_spec (current_as, as, true);
1655 if (current_ts.type == BT_CHARACTER)
1657 switch (match_char_length (&char_len))
1660 cl = gfc_new_charlen (gfc_current_ns, NULL);
1662 cl->length = char_len;
1665 /* Non-constant lengths need to be copied after the first
1666 element. Also copy assumed lengths. */
1669 && (current_ts.u.cl->length == NULL
1670 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1672 cl = gfc_new_charlen (gfc_current_ns, NULL);
1673 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1676 cl = current_ts.u.cl;
1685 /* If this symbol has already shown up in a Cray Pointer declaration,
1686 then we want to set the type & bail out. */
1687 if (gfc_option.flag_cray_pointer)
1689 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1690 if (sym != NULL && sym->attr.cray_pointee)
1692 sym->ts.type = current_ts.type;
1693 sym->ts.kind = current_ts.kind;
1695 sym->ts.u.derived = current_ts.u.derived;
1696 sym->ts.is_c_interop = current_ts.is_c_interop;
1697 sym->ts.is_iso_c = current_ts.is_iso_c;
1700 /* Check to see if we have an array specification. */
1703 if (sym->as != NULL)
1705 gfc_error ("Duplicate array spec for Cray pointee at %C");
1706 gfc_free_array_spec (cp_as);
1712 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1713 gfc_internal_error ("Couldn't set pointee array spec.");
1715 /* Fix the array spec. */
1716 m = gfc_mod_pointee_as (sym->as);
1717 if (m == MATCH_ERROR)
1725 gfc_free_array_spec (cp_as);
1729 /* Procedure pointer as function result. */
1730 if (gfc_current_state () == COMP_FUNCTION
1731 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1732 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1733 strcpy (name, "ppr@");
1735 if (gfc_current_state () == COMP_FUNCTION
1736 && strcmp (name, gfc_current_block ()->name) == 0
1737 && gfc_current_block ()->result
1738 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1739 strcpy (name, "ppr@");
1741 /* OK, we've successfully matched the declaration. Now put the
1742 symbol in the current namespace, because it might be used in the
1743 optional initialization expression for this symbol, e.g. this is
1746 integer, parameter :: i = huge(i)
1748 This is only true for parameters or variables of a basic type.
1749 For components of derived types, it is not true, so we don't
1750 create a symbol for those yet. If we fail to create the symbol,
1752 if (gfc_current_state () != COMP_DERIVED
1753 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1759 /* An interface body specifies all of the procedure's
1760 characteristics and these shall be consistent with those
1761 specified in the procedure definition, except that the interface
1762 may specify a procedure that is not pure if the procedure is
1763 defined to be pure(12.3.2). */
1764 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1765 && gfc_current_ns->proc_name
1766 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1767 && current_ts.u.derived->ns != gfc_current_ns)
1770 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1771 if (!(current_ts.u.derived->attr.imported
1773 && st->n.sym == current_ts.u.derived)
1774 && !gfc_current_ns->has_import_set)
1776 gfc_error ("the type of '%s' at %C has not been declared within the "
1783 /* In functions that have a RESULT variable defined, the function
1784 name always refers to function calls. Therefore, the name is
1785 not allowed to appear in specification statements. */
1786 if (gfc_current_state () == COMP_FUNCTION
1787 && gfc_current_block () != NULL
1788 && gfc_current_block ()->result != NULL
1789 && gfc_current_block ()->result != gfc_current_block ()
1790 && strcmp (gfc_current_block ()->name, name) == 0)
1792 gfc_error ("Function name '%s' not allowed at %C", name);
1797 /* We allow old-style initializations of the form
1798 integer i /2/, j(4) /3*3, 1/
1799 (if no colon has been seen). These are different from data
1800 statements in that initializers are only allowed to apply to the
1801 variable immediately preceding, i.e.
1803 is not allowed. Therefore we have to do some work manually, that
1804 could otherwise be left to the matchers for DATA statements. */
1806 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1808 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1809 "initialization at %C") == FAILURE)
1812 return match_old_style_init (name);
1815 /* The double colon must be present in order to have initializers.
1816 Otherwise the statement is ambiguous with an assignment statement. */
1819 if (gfc_match (" =>") == MATCH_YES)
1821 if (!current_attr.pointer)
1823 gfc_error ("Initialization at %C isn't for a pointer variable");
1828 m = gfc_match_null (&initializer);
1831 gfc_error ("Pointer initialization requires a NULL() at %C");
1835 if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED)
1837 gfc_error ("Initialization of pointer at %C is not allowed in "
1838 "a PURE procedure");
1846 else if (gfc_match_char ('=') == MATCH_YES)
1848 if (current_attr.pointer)
1850 gfc_error ("Pointer initialization at %C requires '=>', "
1856 m = gfc_match_init_expr (&initializer);
1859 gfc_error ("Expected an initialization expression at %C");
1863 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)
1864 && gfc_state_stack->state != COMP_DERIVED)
1866 gfc_error ("Initialization of variable at %C is not allowed in "
1867 "a PURE procedure");
1876 if (initializer != NULL && current_attr.allocatable
1877 && gfc_current_state () == COMP_DERIVED)
1879 gfc_error ("Initialization of allocatable component at %C is not "
1885 /* Add the initializer. Note that it is fine if initializer is
1886 NULL here, because we sometimes also need to check if a
1887 declaration *must* have an initialization expression. */
1888 if (gfc_current_state () != COMP_DERIVED)
1889 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1892 if (current_ts.type == BT_DERIVED
1893 && !current_attr.pointer && !initializer)
1894 initializer = gfc_default_initializer (¤t_ts);
1895 t = build_struct (name, cl, &initializer, &as);
1898 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1901 /* Free stuff up and return. */
1902 gfc_free_expr (initializer);
1903 gfc_free_array_spec (as);
1909 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1910 This assumes that the byte size is equal to the kind number for
1911 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1914 gfc_match_old_kind_spec (gfc_typespec *ts)
1919 if (gfc_match_char ('*') != MATCH_YES)
1922 m = gfc_match_small_literal_int (&ts->kind, NULL);
1926 original_kind = ts->kind;
1928 /* Massage the kind numbers for complex types. */
1929 if (ts->type == BT_COMPLEX)
1933 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1934 gfc_basic_typename (ts->type), original_kind);
1940 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1942 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1943 gfc_basic_typename (ts->type), original_kind);
1947 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1948 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1955 /* Match a kind specification. Since kinds are generally optional, we
1956 usually return MATCH_NO if something goes wrong. If a "kind="
1957 string is found, then we know we have an error. */
1960 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1972 where = loc = gfc_current_locus;
1977 if (gfc_match_char ('(') == MATCH_NO)
1980 /* Also gobbles optional text. */
1981 if (gfc_match (" kind = ") == MATCH_YES)
1984 loc = gfc_current_locus;
1987 n = gfc_match_init_expr (&e);
1991 if (gfc_matching_function)
1993 /* The function kind expression might include use associated or
1994 imported parameters and try again after the specification
1996 if (gfc_match_char (')') != MATCH_YES)
1998 gfc_error ("Missing right parenthesis at %C");
2004 gfc_undo_symbols ();
2009 /* ....or else, the match is real. */
2011 gfc_error ("Expected initialization expression at %C");
2019 gfc_error ("Expected scalar initialization expression at %C");
2024 msg = gfc_extract_int (e, &ts->kind);
2033 /* Before throwing away the expression, let's see if we had a
2034 C interoperable kind (and store the fact). */
2035 if (e->ts.is_c_interop == 1)
2037 /* Mark this as c interoperable if being declared with one
2038 of the named constants from iso_c_binding. */
2039 ts->is_c_interop = e->ts.is_iso_c;
2040 ts->f90_type = e->ts.f90_type;
2046 /* Ignore errors to this point, if we've gotten here. This means
2047 we ignore the m=MATCH_ERROR from above. */
2048 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
2050 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2051 gfc_basic_typename (ts->type));
2052 gfc_current_locus = where;
2056 /* Warn if, e.g., c_int is used for a REAL variable, but not
2057 if, e.g., c_double is used for COMPLEX as the standard
2058 explicitly says that the kind type parameter for complex and real
2059 variable is the same, i.e. c_float == c_float_complex. */
2060 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2061 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2062 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2063 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2064 "is %s", gfc_basic_typename (ts->f90_type), &where,
2065 gfc_basic_typename (ts->type));
2067 gfc_gobble_whitespace ();
2068 if ((c = gfc_next_ascii_char ()) != ')'
2069 && (ts->type != BT_CHARACTER || c != ','))
2071 if (ts->type == BT_CHARACTER)
2072 gfc_error ("Missing right parenthesis or comma at %C");
2074 gfc_error ("Missing right parenthesis at %C");
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;
2095 match_char_kind (int * kind, int * is_iso_c)
2104 where = gfc_current_locus;
2106 n = gfc_match_init_expr (&e);
2108 if (n != MATCH_YES && gfc_matching_function)
2110 /* The expression might include use-associated or imported
2111 parameters and try again after the specification
2114 gfc_undo_symbols ();
2119 gfc_error ("Expected initialization expression at %C");
2125 gfc_error ("Expected scalar initialization expression at %C");
2130 msg = gfc_extract_int (e, kind);
2131 *is_iso_c = e->ts.is_iso_c;
2141 /* Ignore errors to this point, if we've gotten here. This means
2142 we ignore the m=MATCH_ERROR from above. */
2143 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2145 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2149 /* All tests passed. */
2152 if (m == MATCH_ERROR)
2153 gfc_current_locus = where;
2155 /* Return what we know from the test(s). */
2160 gfc_current_locus = where;
2165 /* Match the various kind/length specifications in a CHARACTER
2166 declaration. We don't return MATCH_NO. */
2169 gfc_match_char_spec (gfc_typespec *ts)
2171 int kind, seen_length, is_iso_c;
2181 /* Try the old-style specification first. */
2182 old_char_selector = 0;
2184 m = match_char_length (&len);
2188 old_char_selector = 1;
2193 m = gfc_match_char ('(');
2196 m = MATCH_YES; /* Character without length is a single char. */
2200 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2201 if (gfc_match (" kind =") == MATCH_YES)
2203 m = match_char_kind (&kind, &is_iso_c);
2205 if (m == MATCH_ERROR)
2210 if (gfc_match (" , len =") == MATCH_NO)
2213 m = char_len_param_value (&len);
2216 if (m == MATCH_ERROR)
2223 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2224 if (gfc_match (" len =") == MATCH_YES)
2226 m = char_len_param_value (&len);
2229 if (m == MATCH_ERROR)
2233 if (gfc_match_char (')') == MATCH_YES)
2236 if (gfc_match (" , kind =") != MATCH_YES)
2239 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2245 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2246 m = char_len_param_value (&len);
2249 if (m == MATCH_ERROR)
2253 m = gfc_match_char (')');
2257 if (gfc_match_char (',') != MATCH_YES)
2260 gfc_match (" kind ="); /* Gobble optional text. */
2262 m = match_char_kind (&kind, &is_iso_c);
2263 if (m == MATCH_ERROR)
2269 /* Require a right-paren at this point. */
2270 m = gfc_match_char (')');
2275 gfc_error ("Syntax error in CHARACTER declaration at %C");
2277 gfc_free_expr (len);
2281 /* Deal with character functions after USE and IMPORT statements. */
2282 if (gfc_matching_function)
2284 gfc_free_expr (len);
2285 gfc_undo_symbols ();
2291 gfc_free_expr (len);
2295 /* Do some final massaging of the length values. */
2296 cl = gfc_new_charlen (gfc_current_ns, NULL);
2298 if (seen_length == 0)
2299 cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
2304 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2306 /* We have to know if it was a c interoperable kind so we can
2307 do accurate type checking of bind(c) procs, etc. */
2309 /* Mark this as c interoperable if being declared with one
2310 of the named constants from iso_c_binding. */
2311 ts->is_c_interop = is_iso_c;
2312 else if (len != NULL)
2313 /* Here, we might have parsed something such as: character(c_char)
2314 In this case, the parsing code above grabs the c_char when
2315 looking for the length (line 1690, roughly). it's the last
2316 testcase for parsing the kind params of a character variable.
2317 However, it's not actually the length. this seems like it
2319 To see if the user used a C interop kind, test the expr
2320 of the so called length, and see if it's C interoperable. */
2321 ts->is_c_interop = len->ts.is_iso_c;
2327 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2328 structure to the matched specification. This is necessary for FUNCTION and
2329 IMPLICIT statements.
2331 If implicit_flag is nonzero, then we don't check for the optional
2332 kind specification. Not doing so is needed for matching an IMPLICIT
2333 statement correctly. */
2336 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2338 char name[GFC_MAX_SYMBOL_LEN + 1];
2342 bool seen_deferred_kind, matched_type;
2344 /* A belt and braces check that the typespec is correctly being treated
2345 as a deferred characteristic association. */
2346 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2347 && (gfc_current_block ()->result->ts.kind == -1)
2348 && (ts->kind == -1);
2350 if (seen_deferred_kind)
2353 /* Clear the current binding label, in case one is given. */
2354 curr_binding_label[0] = '\0';
2356 if (gfc_match (" byte") == MATCH_YES)
2358 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2362 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2364 gfc_error ("BYTE type used at %C "
2365 "is not available on the target machine");
2369 ts->type = BT_INTEGER;
2375 m = gfc_match (" type ( %n", name);
2376 matched_type = (m == MATCH_YES);
2378 if ((matched_type && strcmp ("integer", name) == 0)
2379 || (!matched_type && gfc_match (" integer") == MATCH_YES))
2381 ts->type = BT_INTEGER;
2382 ts->kind = gfc_default_integer_kind;
2386 if ((matched_type && strcmp ("character", name) == 0)
2387 || (!matched_type && gfc_match (" character") == MATCH_YES))
2390 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2391 "intrinsic-type-spec at %C") == FAILURE)
2394 ts->type = BT_CHARACTER;
2395 if (implicit_flag == 0)
2396 m = gfc_match_char_spec (ts);
2400 if (matched_type && m == MATCH_YES && gfc_match_char (')') != MATCH_YES)
2406 if ((matched_type && strcmp ("real", name) == 0)
2407 || (!matched_type && gfc_match (" real") == MATCH_YES))
2410 ts->kind = gfc_default_real_kind;
2415 && (strcmp ("doubleprecision", name) == 0
2416 || (strcmp ("double", name) == 0
2417 && gfc_match (" precision") == MATCH_YES)))
2418 || (!matched_type && gfc_match (" double precision") == MATCH_YES))
2421 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2422 "intrinsic-type-spec at %C") == FAILURE)
2424 if (matched_type && gfc_match_char (')') != MATCH_YES)
2428 ts->kind = gfc_default_double_kind;
2432 if ((matched_type && strcmp ("complex", name) == 0)
2433 || (!matched_type && gfc_match (" complex") == MATCH_YES))
2435 ts->type = BT_COMPLEX;
2436 ts->kind = gfc_default_complex_kind;
2441 && (strcmp ("doublecomplex", name) == 0
2442 || (strcmp ("double", name) == 0
2443 && gfc_match (" complex") == MATCH_YES)))
2444 || (!matched_type && gfc_match (" double complex") == MATCH_YES))
2446 if (gfc_notify_std (GFC_STD_GNU, "Extension: DOUBLE COMPLEX at %C")
2451 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2452 "intrinsic-type-spec at %C") == FAILURE)
2455 if (matched_type && gfc_match_char (')') != MATCH_YES)
2458 ts->type = BT_COMPLEX;
2459 ts->kind = gfc_default_double_kind;
2463 if ((matched_type && strcmp ("logical", name) == 0)
2464 || (!matched_type && gfc_match (" logical") == MATCH_YES))
2466 ts->type = BT_LOGICAL;
2467 ts->kind = gfc_default_logical_kind;
2472 m = gfc_match_char (')');
2475 ts->type = BT_DERIVED;
2478 m = gfc_match (" class ( %n )", name);
2481 ts->type = BT_CLASS;
2483 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2488 /* Defer association of the derived type until the end of the
2489 specification block. However, if the derived type can be
2490 found, add it to the typespec. */
2491 if (gfc_matching_function)
2493 ts->u.derived = NULL;
2494 if (gfc_current_state () != COMP_INTERFACE
2495 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2496 ts->u.derived = sym;
2500 /* Search for the name but allow the components to be defined later. If
2501 type = -1, this typespec has been seen in a function declaration but
2502 the type could not be accessed at that point. */
2504 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2506 gfc_error ("Type name '%s' at %C is ambiguous", name);
2509 else if (ts->kind == -1)
2511 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2512 || gfc_current_ns->has_import_set;
2513 if (gfc_find_symbol (name, NULL, iface, &sym))
2515 gfc_error ("Type name '%s' at %C is ambiguous", name);
2524 if (sym->attr.flavor != FL_DERIVED
2525 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2528 gfc_set_sym_referenced (sym);
2529 ts->u.derived = sym;
2535 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2536 "intrinsic-type-spec at %C") == FAILURE)
2539 /* For all types except double, derived and character, look for an
2540 optional kind specifier. MATCH_NO is actually OK at this point. */
2541 if (implicit_flag == 1)
2543 if (matched_type && gfc_match_char (')') != MATCH_YES)
2549 if (gfc_current_form == FORM_FREE)
2551 c = gfc_peek_ascii_char ();
2552 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2553 && c != ':' && c != ',')
2555 if (matched_type && c == ')')
2557 gfc_next_ascii_char ();
2564 m = gfc_match_kind_spec (ts, false);
2565 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2566 m = gfc_match_old_kind_spec (ts);
2568 if (matched_type && gfc_match_char (')') != MATCH_YES)
2571 /* Defer association of the KIND expression of function results
2572 until after USE and IMPORT statements. */
2573 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2574 || gfc_matching_function)
2578 m = MATCH_YES; /* No kind specifier found. */
2584 /* Match an IMPLICIT NONE statement. Actually, this statement is
2585 already matched in parse.c, or we would not end up here in the
2586 first place. So the only thing we need to check, is if there is
2587 trailing garbage. If not, the match is successful. */
2590 gfc_match_implicit_none (void)
2592 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2596 /* Match the letter range(s) of an IMPLICIT statement. */
2599 match_implicit_range (void)
2605 cur_loc = gfc_current_locus;
2607 gfc_gobble_whitespace ();
2608 c = gfc_next_ascii_char ();
2611 gfc_error ("Missing character range in IMPLICIT at %C");
2618 gfc_gobble_whitespace ();
2619 c1 = gfc_next_ascii_char ();
2623 gfc_gobble_whitespace ();
2624 c = gfc_next_ascii_char ();
2629 inner = 0; /* Fall through. */
2636 gfc_gobble_whitespace ();
2637 c2 = gfc_next_ascii_char ();
2641 gfc_gobble_whitespace ();
2642 c = gfc_next_ascii_char ();
2644 if ((c != ',') && (c != ')'))
2657 gfc_error ("Letters must be in alphabetic order in "
2658 "IMPLICIT statement at %C");
2662 /* See if we can add the newly matched range to the pending
2663 implicits from this IMPLICIT statement. We do not check for
2664 conflicts with whatever earlier IMPLICIT statements may have
2665 set. This is done when we've successfully finished matching
2667 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2674 gfc_syntax_error (ST_IMPLICIT);
2676 gfc_current_locus = cur_loc;
2681 /* Match an IMPLICIT statement, storing the types for
2682 gfc_set_implicit() if the statement is accepted by the parser.
2683 There is a strange looking, but legal syntactic construction
2684 possible. It looks like:
2686 IMPLICIT INTEGER (a-b) (c-d)
2688 This is legal if "a-b" is a constant expression that happens to
2689 equal one of the legal kinds for integers. The real problem
2690 happens with an implicit specification that looks like:
2692 IMPLICIT INTEGER (a-b)
2694 In this case, a typespec matcher that is "greedy" (as most of the
2695 matchers are) gobbles the character range as a kindspec, leaving
2696 nothing left. We therefore have to go a bit more slowly in the
2697 matching process by inhibiting the kindspec checking during
2698 typespec matching and checking for a kind later. */
2701 gfc_match_implicit (void)
2710 /* We don't allow empty implicit statements. */
2711 if (gfc_match_eos () == MATCH_YES)
2713 gfc_error ("Empty IMPLICIT statement at %C");
2719 /* First cleanup. */
2720 gfc_clear_new_implicit ();
2722 /* A basic type is mandatory here. */
2723 m = gfc_match_decl_type_spec (&ts, 1);
2724 if (m == MATCH_ERROR)
2729 cur_loc = gfc_current_locus;
2730 m = match_implicit_range ();
2734 /* We may have <TYPE> (<RANGE>). */
2735 gfc_gobble_whitespace ();
2736 c = gfc_next_ascii_char ();
2737 if ((c == '\n') || (c == ','))
2739 /* Check for CHARACTER with no length parameter. */
2740 if (ts.type == BT_CHARACTER && !ts.u.cl)
2742 ts.kind = gfc_default_character_kind;
2743 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2744 ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind,
2748 /* Record the Successful match. */
2749 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2754 gfc_current_locus = cur_loc;
2757 /* Discard the (incorrectly) matched range. */
2758 gfc_clear_new_implicit ();
2760 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2761 if (ts.type == BT_CHARACTER)
2762 m = gfc_match_char_spec (&ts);
2765 m = gfc_match_kind_spec (&ts, false);
2768 m = gfc_match_old_kind_spec (&ts);
2769 if (m == MATCH_ERROR)
2775 if (m == MATCH_ERROR)
2778 m = match_implicit_range ();
2779 if (m == MATCH_ERROR)
2784 gfc_gobble_whitespace ();
2785 c = gfc_next_ascii_char ();
2786 if ((c != '\n') && (c != ','))
2789 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2797 gfc_syntax_error (ST_IMPLICIT);
2805 gfc_match_import (void)
2807 char name[GFC_MAX_SYMBOL_LEN + 1];
2812 if (gfc_current_ns->proc_name == NULL
2813 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2815 gfc_error ("IMPORT statement at %C only permitted in "
2816 "an INTERFACE body");
2820 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2824 if (gfc_match_eos () == MATCH_YES)
2826 /* All host variables should be imported. */
2827 gfc_current_ns->has_import_set = 1;
2831 if (gfc_match (" ::") == MATCH_YES)
2833 if (gfc_match_eos () == MATCH_YES)
2835 gfc_error ("Expecting list of named entities at %C");
2842 m = gfc_match (" %n", name);
2846 if (gfc_current_ns->parent != NULL
2847 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2849 gfc_error ("Type name '%s' at %C is ambiguous", name);
2852 else if (gfc_current_ns->proc_name->ns->parent != NULL
2853 && gfc_find_symbol (name,
2854 gfc_current_ns->proc_name->ns->parent,
2857 gfc_error ("Type name '%s' at %C is ambiguous", name);
2863 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2864 "at %C - does not exist.", name);
2868 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2870 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2875 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2878 sym->attr.imported = 1;
2890 if (gfc_match_eos () == MATCH_YES)
2892 if (gfc_match_char (',') != MATCH_YES)
2899 gfc_error ("Syntax error in IMPORT statement at %C");
2904 /* A minimal implementation of gfc_match without whitespace, escape
2905 characters or variable arguments. Returns true if the next
2906 characters match the TARGET template exactly. */
2909 match_string_p (const char *target)
2913 for (p = target; *p; p++)
2914 if ((char) gfc_next_ascii_char () != *p)
2919 /* Matches an attribute specification including array specs. If
2920 successful, leaves the variables current_attr and current_as
2921 holding the specification. Also sets the colon_seen variable for
2922 later use by matchers associated with initializations.
2924 This subroutine is a little tricky in the sense that we don't know
2925 if we really have an attr-spec until we hit the double colon.
2926 Until that time, we can only return MATCH_NO. This forces us to
2927 check for duplicate specification at this level. */
2930 match_attr_spec (void)
2932 /* Modifiers that can exist in a type statement. */
2934 { GFC_DECL_BEGIN = 0,
2935 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2936 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2937 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2938 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2939 DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS,
2940 DECL_NONE, GFC_DECL_END /* Sentinel */
2944 /* GFC_DECL_END is the sentinel, index starts at 0. */
2945 #define NUM_DECL GFC_DECL_END
2947 locus start, seen_at[NUM_DECL];
2954 gfc_clear_attr (¤t_attr);
2955 start = gfc_current_locus;
2960 /* See if we get all of the keywords up to the final double colon. */
2961 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2969 gfc_gobble_whitespace ();
2971 ch = gfc_next_ascii_char ();
2974 /* This is the successful exit condition for the loop. */
2975 if (gfc_next_ascii_char () == ':')
2980 gfc_gobble_whitespace ();
2981 switch (gfc_peek_ascii_char ())
2984 gfc_next_ascii_char ();
2985 switch (gfc_next_ascii_char ())
2988 if (match_string_p ("locatable"))
2990 /* Matched "allocatable". */
2991 d = DECL_ALLOCATABLE;
2996 if (match_string_p ("ynchronous"))
2998 /* Matched "asynchronous". */
2999 d = DECL_ASYNCHRONOUS;
3006 /* Try and match the bind(c). */
3007 m = gfc_match_bind_c (NULL, true);
3010 else if (m == MATCH_ERROR)
3015 gfc_next_ascii_char ();
3016 if ('o' != gfc_next_ascii_char ())
3018 switch (gfc_next_ascii_char ())
3021 if (match_string_p ("imension"))
3023 d = DECL_CODIMENSION;
3027 if (match_string_p ("tiguous"))
3029 d = DECL_CONTIGUOUS;
3036 if (match_string_p ("dimension"))
3041 if (match_string_p ("external"))
3046 if (match_string_p ("int"))
3048 ch = gfc_next_ascii_char ();
3051 if (match_string_p ("nt"))
3053 /* Matched "intent". */
3054 /* TODO: Call match_intent_spec from here. */
3055 if (gfc_match (" ( in out )") == MATCH_YES)
3057 else if (gfc_match (" ( in )") == MATCH_YES)
3059 else if (gfc_match (" ( out )") == MATCH_YES)
3065 if (match_string_p ("insic"))
3067 /* Matched "intrinsic". */
3075 if (match_string_p ("optional"))
3080 gfc_next_ascii_char ();
3081 switch (gfc_next_ascii_char ())
3084 if (match_string_p ("rameter"))
3086 /* Matched "parameter". */
3092 if (match_string_p ("inter"))
3094 /* Matched "pointer". */
3100 ch = gfc_next_ascii_char ();
3103 if (match_string_p ("vate"))
3105 /* Matched "private". */
3111 if (match_string_p ("tected"))
3113 /* Matched "protected". */
3120 if (match_string_p ("blic"))
3122 /* Matched "public". */
3130 if (match_string_p ("save"))
3135 if (match_string_p ("target"))
3140 gfc_next_ascii_char ();
3141 ch = gfc_next_ascii_char ();
3144 if (match_string_p ("lue"))
3146 /* Matched "value". */
3152 if (match_string_p ("latile"))
3154 /* Matched "volatile". */
3162 /* No double colon and no recognizable decl_type, so assume that
3163 we've been looking at something else the whole time. */
3170 /* Check to make sure any parens are paired up correctly. */
3171 if (gfc_match_parens () == MATCH_ERROR)
3178 seen_at[d] = gfc_current_locus;
3180 if (d == DECL_DIMENSION || d == DECL_CODIMENSION)
3182 gfc_array_spec *as = NULL;
3184 m = gfc_match_array_spec (&as, d == DECL_DIMENSION,
3185 d == DECL_CODIMENSION);
3187 if (current_as == NULL)
3189 else if (m == MATCH_YES)
3191 merge_array_spec (as, current_as, false);
3197 if (d == DECL_CODIMENSION)
3198 gfc_error ("Missing codimension specification at %C");
3200 gfc_error ("Missing dimension specification at %C");
3204 if (m == MATCH_ERROR)
3209 /* Since we've seen a double colon, we have to be looking at an
3210 attr-spec. This means that we can now issue errors. */
3211 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3216 case DECL_ALLOCATABLE:
3217 attr = "ALLOCATABLE";
3219 case DECL_ASYNCHRONOUS:
3220 attr = "ASYNCHRONOUS";
3222 case DECL_CODIMENSION:
3223 attr = "CODIMENSION";
3225 case DECL_CONTIGUOUS:
3226 attr = "CONTIGUOUS";
3228 case DECL_DIMENSION:
3235 attr = "INTENT (IN)";
3238 attr = "INTENT (OUT)";
3241 attr = "INTENT (IN OUT)";
3243 case DECL_INTRINSIC:
3249 case DECL_PARAMETER:
3255 case DECL_PROTECTED:
3270 case DECL_IS_BIND_C:
3280 attr = NULL; /* This shouldn't happen. */
3283 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3288 /* Now that we've dealt with duplicate attributes, add the attributes
3289 to the current attribute. */
3290 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3295 if (gfc_current_state () == COMP_DERIVED
3296 && d != DECL_DIMENSION && d != DECL_CODIMENSION
3297 && d != DECL_POINTER && d != DECL_PRIVATE
3298 && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE)
3300 if (d == DECL_ALLOCATABLE)
3302 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3303 "attribute at %C in a TYPE definition")
3312 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3319 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3320 && gfc_current_state () != COMP_MODULE)
3322 if (d == DECL_PRIVATE)
3326 if (gfc_current_state () == COMP_DERIVED
3327 && gfc_state_stack->previous
3328 && gfc_state_stack->previous->state == COMP_MODULE)
3330 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3331 "at %L in a TYPE definition", attr,
3341 gfc_error ("%s attribute at %L is not allowed outside of the "
3342 "specification part of a module", attr, &seen_at[d]);
3350 case DECL_ALLOCATABLE:
3351 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3354 case DECL_ASYNCHRONOUS:
3355 if (gfc_notify_std (GFC_STD_F2003,
3356 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3360 t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]);
3363 case DECL_CODIMENSION:
3364 t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]);
3367 case DECL_CONTIGUOUS:
3368 if (gfc_notify_std (GFC_STD_F2008,
3369 "Fortran 2008: CONTIGUOUS attribute at %C")
3373 t = gfc_add_contiguous (¤t_attr, NULL, &seen_at[d]);
3376 case DECL_DIMENSION:
3377 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3381 t = gfc_add_external (¤t_attr, &seen_at[d]);
3385 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3389 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3393 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3396 case DECL_INTRINSIC:
3397 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3401 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3404 case DECL_PARAMETER:
3405 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3409 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3412 case DECL_PROTECTED:
3413 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3415 gfc_error ("PROTECTED at %C only allowed in specification "
3416 "part of a module");
3421 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3426 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3430 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3435 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3440 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3444 t = gfc_add_target (¤t_attr, &seen_at[d]);
3447 case DECL_IS_BIND_C:
3448 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3452 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3457 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3461 if (gfc_notify_std (GFC_STD_F2003,
3462 "Fortran 2003: VOLATILE attribute at %C")
3466 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3470 gfc_internal_error ("match_attr_spec(): Bad attribute");
3484 gfc_current_locus = start;
3485 gfc_free_array_spec (current_as);
3491 /* Set the binding label, dest_label, either with the binding label
3492 stored in the given gfc_typespec, ts, or if none was provided, it
3493 will be the symbol name in all lower case, as required by the draft
3494 (J3/04-007, section 15.4.1). If a binding label was given and
3495 there is more than one argument (num_idents), it is an error. */
3498 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3500 if (num_idents > 1 && has_name_equals)
3502 gfc_error ("Multiple identifiers provided with "
3503 "single NAME= specifier at %C");
3507 if (curr_binding_label[0] != '\0')
3509 /* Binding label given; store in temp holder til have sym. */
3510 strcpy (dest_label, curr_binding_label);
3514 /* No binding label given, and the NAME= specifier did not exist,
3515 which means there was no NAME="". */
3516 if (sym_name != NULL && has_name_equals == 0)
3517 strcpy (dest_label, sym_name);
3524 /* Set the status of the given common block as being BIND(C) or not,
3525 depending on the given parameter, is_bind_c. */
3528 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3530 com_block->is_bind_c = is_bind_c;
3535 /* Verify that the given gfc_typespec is for a C interoperable type. */
3538 verify_c_interop (gfc_typespec *ts)
3540 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3541 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3542 else if (ts->is_c_interop != 1)
3549 /* Verify that the variables of a given common block, which has been
3550 defined with the attribute specifier bind(c), to be of a C
3551 interoperable type. Errors will be reported here, if
3555 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3557 gfc_symbol *curr_sym = NULL;
3558 gfc_try retval = SUCCESS;
3560 curr_sym = com_block->head;
3562 /* Make sure we have at least one symbol. */
3563 if (curr_sym == NULL)
3566 /* Here we know we have a symbol, so we'll execute this loop
3570 /* The second to last param, 1, says this is in a common block. */
3571 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3572 curr_sym = curr_sym->common_next;
3573 } while (curr_sym != NULL);
3579 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3580 an appropriate error message is reported. */
3583 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3584 int is_in_common, gfc_common_head *com_block)
3586 bool bind_c_function = false;
3587 gfc_try retval = SUCCESS;
3589 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3590 bind_c_function = true;
3592 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3594 tmp_sym = tmp_sym->result;
3595 /* Make sure it wasn't an implicitly typed result. */
3596 if (tmp_sym->attr.implicit_type)
3598 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3599 "%L may not be C interoperable", tmp_sym->name,
3600 &tmp_sym->declared_at);
3601 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3602 /* Mark it as C interoperable to prevent duplicate warnings. */
3603 tmp_sym->ts.is_c_interop = 1;
3604 tmp_sym->attr.is_c_interop = 1;
3608 /* Here, we know we have the bind(c) attribute, so if we have
3609 enough type info, then verify that it's a C interop kind.
3610 The info could be in the symbol already, or possibly still in
3611 the given ts (current_ts), so look in both. */
3612 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3614 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3616 /* See if we're dealing with a sym in a common block or not. */
3617 if (is_in_common == 1)
3619 gfc_warning ("Variable '%s' in common block '%s' at %L "
3620 "may not be a C interoperable "
3621 "kind though common block '%s' is BIND(C)",
3622 tmp_sym->name, com_block->name,
3623 &(tmp_sym->declared_at), com_block->name);
3627 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3628 gfc_error ("Type declaration '%s' at %L is not C "
3629 "interoperable but it is BIND(C)",
3630 tmp_sym->name, &(tmp_sym->declared_at));
3632 gfc_warning ("Variable '%s' at %L "
3633 "may not be a C interoperable "
3634 "kind but it is bind(c)",
3635 tmp_sym->name, &(tmp_sym->declared_at));
3639 /* Variables declared w/in a common block can't be bind(c)
3640 since there's no way for C to see these variables, so there's
3641 semantically no reason for the attribute. */
3642 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3644 gfc_error ("Variable '%s' in common block '%s' at "
3645 "%L cannot be declared with BIND(C) "
3646 "since it is not a global",
3647 tmp_sym->name, com_block->name,
3648 &(tmp_sym->declared_at));
3652 /* Scalar variables that are bind(c) can not have the pointer
3653 or allocatable attributes. */
3654 if (tmp_sym->attr.is_bind_c == 1)
3656 if (tmp_sym->attr.pointer == 1)
3658 gfc_error ("Variable '%s' at %L cannot have both the "
3659 "POINTER and BIND(C) attributes",
3660 tmp_sym->name, &(tmp_sym->declared_at));
3664 if (tmp_sym->attr.allocatable == 1)
3666 gfc_error ("Variable '%s' at %L cannot have both the "
3667 "ALLOCATABLE and BIND(C) attributes",
3668 tmp_sym->name, &(tmp_sym->declared_at));
3674 /* If it is a BIND(C) function, make sure the return value is a
3675 scalar value. The previous tests in this function made sure
3676 the type is interoperable. */
3677 if (bind_c_function && tmp_sym->as != NULL)
3678 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3679 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3681 /* BIND(C) functions can not return a character string. */
3682 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3683 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3684 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3685 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3686 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3687 "be a character string", tmp_sym->name,
3688 &(tmp_sym->declared_at));
3691 /* See if the symbol has been marked as private. If it has, make sure
3692 there is no binding label and warn the user if there is one. */
3693 if (tmp_sym->attr.access == ACCESS_PRIVATE
3694 && tmp_sym->binding_label[0] != '\0')
3695 /* Use gfc_warning_now because we won't say that the symbol fails
3696 just because of this. */
3697 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3698 "given the binding label '%s'", tmp_sym->name,
3699 &(tmp_sym->declared_at), tmp_sym->binding_label);
3705 /* Set the appropriate fields for a symbol that's been declared as
3706 BIND(C) (the is_bind_c flag and the binding label), and verify that
3707 the type is C interoperable. Errors are reported by the functions
3708 used to set/test these fields. */
3711 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3713 gfc_try retval = SUCCESS;
3715 /* TODO: Do we need to make sure the vars aren't marked private? */
3717 /* Set the is_bind_c bit in symbol_attribute. */
3718 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3720 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3721 num_idents) != SUCCESS)
3728 /* Set the fields marking the given common block as BIND(C), including
3729 a binding label, and report any errors encountered. */
3732 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3734 gfc_try retval = SUCCESS;
3736 /* destLabel, common name, typespec (which may have binding label). */
3737 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3741 /* Set the given common block (com_block) to being bind(c) (1). */
3742 set_com_block_bind_c (com_block, 1);
3748 /* Retrieve the list of one or more identifiers that the given bind(c)
3749 attribute applies to. */
3752 get_bind_c_idents (void)
3754 char name[GFC_MAX_SYMBOL_LEN + 1];
3756 gfc_symbol *tmp_sym = NULL;
3758 gfc_common_head *com_block = NULL;
3760 if (gfc_match_name (name) == MATCH_YES)
3762 found_id = MATCH_YES;
3763 gfc_get_ha_symbol (name, &tmp_sym);
3765 else if (match_common_name (name) == MATCH_YES)
3767 found_id = MATCH_YES;
3768 com_block = gfc_get_common (name, 0);
3772 gfc_error ("Need either entity or common block name for "
3773 "attribute specification statement at %C");
3777 /* Save the current identifier and look for more. */
3780 /* Increment the number of identifiers found for this spec stmt. */
3783 /* Make sure we have a sym or com block, and verify that it can
3784 be bind(c). Set the appropriate field(s) and look for more
3786 if (tmp_sym != NULL || com_block != NULL)
3788 if (tmp_sym != NULL)
3790 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3796 if (set_verify_bind_c_com_block(com_block, num_idents)
3801 /* Look to see if we have another identifier. */
3803 if (gfc_match_eos () == MATCH_YES)
3804 found_id = MATCH_NO;
3805 else if (gfc_match_char (',') != MATCH_YES)
3806 found_id = MATCH_NO;
3807 else if (gfc_match_name (name) == MATCH_YES)
3809 found_id = MATCH_YES;
3810 gfc_get_ha_symbol (name, &tmp_sym);
3812 else if (match_common_name (name) == MATCH_YES)
3814 found_id = MATCH_YES;
3815 com_block = gfc_get_common (name, 0);
3819 gfc_error ("Missing entity or common block name for "
3820 "attribute specification statement at %C");
3826 gfc_internal_error ("Missing symbol");
3828 } while (found_id == MATCH_YES);
3830 /* if we get here we were successful */
3835 /* Try and match a BIND(C) attribute specification statement. */
3838 gfc_match_bind_c_stmt (void)
3840 match found_match = MATCH_NO;
3845 /* This may not be necessary. */
3847 /* Clear the temporary binding label holder. */
3848 curr_binding_label[0] = '\0';
3850 /* Look for the bind(c). */
3851 found_match = gfc_match_bind_c (NULL, true);
3853 if (found_match == MATCH_YES)
3855 /* Look for the :: now, but it is not required. */
3858 /* Get the identifier(s) that needs to be updated. This may need to
3859 change to hand the flag(s) for the attr specified so all identifiers
3860 found can have all appropriate parts updated (assuming that the same
3861 spec stmt can have multiple attrs, such as both bind(c) and
3863 if (get_bind_c_idents () != SUCCESS)
3864 /* Error message should have printed already. */
3872 /* Match a data declaration statement. */
3875 gfc_match_data_decl (void)
3881 num_idents_on_line = 0;
3883 m = gfc_match_decl_type_spec (¤t_ts, 0);
3887 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3888 && gfc_current_state () != COMP_DERIVED)
3890 sym = gfc_use_derived (current_ts.u.derived);
3898 current_ts.u.derived = sym;
3901 m = match_attr_spec ();
3902 if (m == MATCH_ERROR)
3908 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3909 && current_ts.u.derived->components == NULL
3910 && !current_ts.u.derived->attr.zero_comp)
3913 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3916 gfc_find_symbol (current_ts.u.derived->name,
3917 current_ts.u.derived->ns->parent, 1, &sym);
3919 /* Any symbol that we find had better be a type definition
3920 which has its components defined. */
3921 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3922 && (current_ts.u.derived->components != NULL
3923 || current_ts.u.derived->attr.zero_comp))
3926 /* Now we have an error, which we signal, and then fix up
3927 because the knock-on is plain and simple confusing. */
3928 gfc_error_now ("Derived type at %C has not been previously defined "
3929 "and so cannot appear in a derived type definition");
3930 current_attr.pointer = 1;
3935 /* If we have an old-style character declaration, and no new-style
3936 attribute specifications, then there a comma is optional between
3937 the type specification and the variable list. */
3938 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3939 gfc_match_char (',');
3941 /* Give the types/attributes to symbols that follow. Give the element
3942 a number so that repeat character length expressions can be copied. */
3946 num_idents_on_line++;
3947 m = variable_decl (elem++);
3948 if (m == MATCH_ERROR)
3953 if (gfc_match_eos () == MATCH_YES)
3955 if (gfc_match_char (',') != MATCH_YES)
3959 if (gfc_error_flag_test () == 0)
3960 gfc_error ("Syntax error in data declaration at %C");
3963 gfc_free_data_all (gfc_current_ns);
3966 gfc_free_array_spec (current_as);
3972 /* Match a prefix associated with a function or subroutine
3973 declaration. If the typespec pointer is nonnull, then a typespec
3974 can be matched. Note that if nothing matches, MATCH_YES is
3975 returned (the null string was matched). */
3978 gfc_match_prefix (gfc_typespec *ts)
3982 gfc_clear_attr (¤t_attr);
3985 gcc_assert (!gfc_matching_prefix);
3986 gfc_matching_prefix = true;
3989 if (!seen_type && ts != NULL
3990 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3991 && gfc_match_space () == MATCH_YES)
3998 if (gfc_match ("elemental% ") == MATCH_YES)
4000 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
4006 if (gfc_match ("pure% ") == MATCH_YES)
4008 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
4014 if (gfc_match ("recursive% ") == MATCH_YES)
4016 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
4022 /* At this point, the next item is not a prefix. */
4023 gcc_assert (gfc_matching_prefix);
4024 gfc_matching_prefix = false;
4028 gcc_assert (gfc_matching_prefix);
4029 gfc_matching_prefix = false;
4034 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
4037 copy_prefix (symbol_attribute *dest, locus *where)
4039 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
4042 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
4045 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
4052 /* Match a formal argument list. */
4055 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
4057 gfc_formal_arglist *head, *tail, *p, *q;
4058 char name[GFC_MAX_SYMBOL_LEN + 1];
4064 if (gfc_match_char ('(') != MATCH_YES)
4071 if (gfc_match_char (')') == MATCH_YES)
4076 if (gfc_match_char ('*') == MATCH_YES)
4080 m = gfc_match_name (name);
4084 if (gfc_get_symbol (name, NULL, &sym))
4088 p = gfc_get_formal_arglist ();
4100 /* We don't add the VARIABLE flavor because the name could be a
4101 dummy procedure. We don't apply these attributes to formal
4102 arguments of statement functions. */
4103 if (sym != NULL && !st_flag
4104 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
4105 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
4111 /* The name of a program unit can be in a different namespace,
4112 so check for it explicitly. After the statement is accepted,
4113 the name is checked for especially in gfc_get_symbol(). */
4114 if (gfc_new_block != NULL && sym != NULL
4115 && strcmp (sym->name, gfc_new_block->name) == 0)
4117 gfc_error ("Name '%s' at %C is the name of the procedure",
4123 if (gfc_match_char (')') == MATCH_YES)
4126 m = gfc_match_char (',');
4129 gfc_error ("Unexpected junk in formal argument list at %C");
4135 /* Check for duplicate symbols in the formal argument list. */
4138 for (p = head; p->next; p = p->next)
4143 for (q = p->next; q; q = q->next)
4144 if (p->sym == q->sym)
4146 gfc_error ("Duplicate symbol '%s' in formal argument list "
4147 "at %C", p->sym->name);
4155 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
4165 gfc_free_formal_arglist (head);
4170 /* Match a RESULT specification following a function declaration or
4171 ENTRY statement. Also matches the end-of-statement. */
4174 match_result (gfc_symbol *function, gfc_symbol **result)
4176 char name[GFC_MAX_SYMBOL_LEN + 1];
4180 if (gfc_match (" result (") != MATCH_YES)
4183 m = gfc_match_name (name);
4187 /* Get the right paren, and that's it because there could be the
4188 bind(c) attribute after the result clause. */
4189 if (gfc_match_char(')') != MATCH_YES)
4191 /* TODO: should report the missing right paren here. */
4195 if (strcmp (function->name, name) == 0)
4197 gfc_error ("RESULT variable at %C must be different than function name");
4201 if (gfc_get_symbol (name, NULL, &r))
4204 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4213 /* Match a function suffix, which could be a combination of a result
4214 clause and BIND(C), either one, or neither. The draft does not
4215 require them to come in a specific order. */
4218 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4220 match is_bind_c; /* Found bind(c). */
4221 match is_result; /* Found result clause. */
4222 match found_match; /* Status of whether we've found a good match. */
4223 char peek_char; /* Character we're going to peek at. */
4224 bool allow_binding_name;
4226 /* Initialize to having found nothing. */
4227 found_match = MATCH_NO;
4228 is_bind_c = MATCH_NO;
4229 is_result = MATCH_NO;
4231 /* Get the next char to narrow between result and bind(c). */
4232 gfc_gobble_whitespace ();
4233 peek_char = gfc_peek_ascii_char ();
4235 /* C binding names are not allowed for internal procedures. */
4236 if (gfc_current_state () == COMP_CONTAINS
4237 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4238 allow_binding_name = false;
4240 allow_binding_name = true;
4245 /* Look for result clause. */
4246 is_result = match_result (sym, result);
4247 if (is_result == MATCH_YES)
4249 /* Now see if there is a bind(c) after it. */
4250 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4251 /* We've found the result clause and possibly bind(c). */
4252 found_match = MATCH_YES;
4255 /* This should only be MATCH_ERROR. */
4256 found_match = is_result;
4259 /* Look for bind(c) first. */
4260 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4261 if (is_bind_c == MATCH_YES)
4263 /* Now see if a result clause followed it. */
4264 is_result = match_result (sym, result);
4265 found_match = MATCH_YES;
4269 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4270 found_match = MATCH_ERROR;
4274 gfc_error ("Unexpected junk after function declaration at %C");
4275 found_match = MATCH_ERROR;
4279 if (is_bind_c == MATCH_YES)
4281 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4282 if (gfc_current_state () == COMP_CONTAINS
4283 && sym->ns->proc_name->attr.flavor != FL_MODULE
4284 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4285 "at %L may not be specified for an internal "
4286 "procedure", &gfc_current_locus)
4290 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4299 /* Procedure pointer return value without RESULT statement:
4300 Add "hidden" result variable named "ppr@". */
4303 add_hidden_procptr_result (gfc_symbol *sym)
4307 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4310 /* First usage case: PROCEDURE and EXTERNAL statements. */
4311 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4312 && strcmp (gfc_current_block ()->name, sym->name) == 0
4313 && sym->attr.external;
4314 /* Second usage case: INTERFACE statements. */
4315 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4316 && gfc_state_stack->previous->state == COMP_FUNCTION
4317 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4323 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4327 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4328 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4329 st2->n.sym = stree->n.sym;
4331 sym->result = stree->n.sym;
4333 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4334 sym->result->attr.pointer = sym->attr.pointer;
4335 sym->result->attr.external = sym->attr.external;
4336 sym->result->attr.referenced = sym->attr.referenced;
4337 sym->result->ts = sym->ts;
4338 sym->attr.proc_pointer = 0;
4339 sym->attr.pointer = 0;
4340 sym->attr.external = 0;
4341 if (sym->result->attr.external && sym->result->attr.pointer)
4343 sym->result->attr.pointer = 0;
4344 sym->result->attr.proc_pointer = 1;
4347 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4349 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4350 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4351 && sym->result && sym->result != sym && sym->result->attr.external
4352 && sym == gfc_current_ns->proc_name
4353 && sym == sym->result->ns->proc_name
4354 && strcmp ("ppr@", sym->result->name) == 0)
4356 sym->result->attr.proc_pointer = 1;
4357 sym->attr.pointer = 0;
4365 /* Match the interface for a PROCEDURE declaration,
4366 including brackets (R1212). */
4369 match_procedure_interface (gfc_symbol **proc_if)
4373 locus old_loc, entry_loc;
4374 gfc_namespace *old_ns = gfc_current_ns;
4375 char name[GFC_MAX_SYMBOL_LEN + 1];
4377 old_loc = entry_loc = gfc_current_locus;
4378 gfc_clear_ts (¤t_ts);
4380 if (gfc_match (" (") != MATCH_YES)
4382 gfc_current_locus = entry_loc;
4386 /* Get the type spec. for the procedure interface. */
4387 old_loc = gfc_current_locus;
4388 m = gfc_match_decl_type_spec (¤t_ts, 0);
4389 gfc_gobble_whitespace ();
4390 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4393 if (m == MATCH_ERROR)
4396 /* Procedure interface is itself a procedure. */
4397 gfc_current_locus = old_loc;
4398 m = gfc_match_name (name);
4400 /* First look to see if it is already accessible in the current
4401 namespace because it is use associated or contained. */
4403 if (gfc_find_sym_tree (name, NULL, 0, &st))
4406 /* If it is still not found, then try the parent namespace, if it
4407 exists and create the symbol there if it is still not found. */
4408 if (gfc_current_ns->parent)
4409 gfc_current_ns = gfc_current_ns->parent;
4410 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4413 gfc_current_ns = old_ns;
4414 *proc_if = st->n.sym;
4416 /* Various interface checks. */
4420 /* Resolve interface if possible. That way, attr.procedure is only set
4421 if it is declared by a later procedure-declaration-stmt, which is
4422 invalid per C1212. */
4423 while ((*proc_if)->ts.interface)
4424 *proc_if = (*proc_if)->ts.interface;
4426 if ((*proc_if)->generic)
4428 gfc_error ("Interface '%s' at %C may not be generic",
4432 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4434 gfc_error ("Interface '%s' at %C may not be a statement function",
4438 /* Handle intrinsic procedures. */
4439 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4440 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4441 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4442 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4443 (*proc_if)->attr.intrinsic = 1;
4444 if ((*proc_if)->attr.intrinsic
4445 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4447 gfc_error ("Intrinsic procedure '%s' not allowed "
4448 "in PROCEDURE statement at %C", (*proc_if)->name);
4454 if (gfc_match (" )") != MATCH_YES)
4456 gfc_current_locus = entry_loc;
4464 /* Match a PROCEDURE declaration (R1211). */
4467 match_procedure_decl (void)
4470 gfc_symbol *sym, *proc_if = NULL;
4472 gfc_expr *initializer = NULL;
4474 /* Parse interface (with brackets). */
4475 m = match_procedure_interface (&proc_if);
4479 /* Parse attributes (with colons). */
4480 m = match_attr_spec();
4481 if (m == MATCH_ERROR)
4484 /* Get procedure symbols. */
4487 m = gfc_match_symbol (&sym, 0);
4490 else if (m == MATCH_ERROR)
4493 /* Add current_attr to the symbol attributes. */
4494 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4497 if (sym->attr.is_bind_c)
4499 /* Check for C1218. */
4500 if (!proc_if || !proc_if->attr.is_bind_c)
4502 gfc_error ("BIND(C) attribute at %C requires "
4503 "an interface with BIND(C)");
4506 /* Check for C1217. */
4507 if (has_name_equals && sym->attr.pointer)
4509 gfc_error ("BIND(C) procedure with NAME may not have "
4510 "POINTER attribute at %C");
4513 if (has_name_equals && sym->attr.dummy)
4515 gfc_error ("Dummy procedure at %C may not have "
4516 "BIND(C) attribute with NAME");
4519 /* Set binding label for BIND(C). */
4520 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4524 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4527 if (add_hidden_procptr_result (sym) == SUCCESS)
4530 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4533 /* Set interface. */
4534 if (proc_if != NULL)
4536 if (sym->ts.type != BT_UNKNOWN)
4538 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4539 sym->name, &gfc_current_locus,
4540 gfc_basic_typename (sym->ts.type));
4543 sym->ts.interface = proc_if;
4544 sym->attr.untyped = 1;
4545 sym->attr.if_source = IFSRC_IFBODY;
4547 else if (current_ts.type != BT_UNKNOWN)
4549 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4551 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4552 sym->ts.interface->ts = current_ts;
4553 sym->ts.interface->attr.function = 1;
4554 sym->attr.function = sym->ts.interface->attr.function;
4555 sym->attr.if_source = IFSRC_UNKNOWN;
4558 if (gfc_match (" =>") == MATCH_YES)
4560 if (!current_attr.pointer)
4562 gfc_error ("Initialization at %C isn't for a pointer variable");
4567 m = gfc_match_null (&initializer);
4570 gfc_error ("Pointer initialization requires a NULL() at %C");
4574 if (gfc_pure (NULL))
4576 gfc_error ("Initialization of pointer at %C is not allowed in "
4577 "a PURE procedure");
4584 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4590 gfc_set_sym_referenced (sym);
4592 if (gfc_match_eos () == MATCH_YES)
4594 if (gfc_match_char (',') != MATCH_YES)
4599 gfc_error ("Syntax error in PROCEDURE statement at %C");
4603 /* Free stuff up and return. */
4604 gfc_free_expr (initializer);
4610 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4613 /* Match a procedure pointer component declaration (R445). */
4616 match_ppc_decl (void)
4619 gfc_symbol *proc_if = NULL;
4623 gfc_expr *initializer = NULL;
4624 gfc_typebound_proc* tb;
4625 char name[GFC_MAX_SYMBOL_LEN + 1];
4627 /* Parse interface (with brackets). */
4628 m = match_procedure_interface (&proc_if);
4632 /* Parse attributes. */
4633 tb = XCNEW (gfc_typebound_proc);
4634 tb->where = gfc_current_locus;
4635 m = match_binding_attributes (tb, false, true);
4636 if (m == MATCH_ERROR)
4639 gfc_clear_attr (¤t_attr);
4640 current_attr.procedure = 1;
4641 current_attr.proc_pointer = 1;
4642 current_attr.access = tb->access;
4643 current_attr.flavor = FL_PROCEDURE;
4645 /* Match the colons (required). */
4646 if (gfc_match (" ::") != MATCH_YES)
4648 gfc_error ("Expected '::' after binding-attributes at %C");
4652 /* Check for C450. */
4653 if (!tb->nopass && proc_if == NULL)
4655 gfc_error("NOPASS or explicit interface required at %C");
4659 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4660 "component at %C") == FAILURE)
4663 /* Match PPC names. */
4667 m = gfc_match_name (name);
4670 else if (m == MATCH_ERROR)
4673 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4676 /* Add current_attr to the symbol attributes. */
4677 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4680 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4683 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4688 /* Set interface. */
4689 if (proc_if != NULL)
4691 c->ts.interface = proc_if;
4692 c->attr.untyped = 1;
4693 c->attr.if_source = IFSRC_IFBODY;
4695 else if (ts.type != BT_UNKNOWN)
4698 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4699 c->ts.interface->ts = ts;
4700 c->ts.interface->attr.function = 1;
4701 c->attr.function = c->ts.interface->attr.function;
4702 c->attr.if_source = IFSRC_UNKNOWN;
4705 if (gfc_match (" =>") == MATCH_YES)
4707 m = gfc_match_null (&initializer);
4710 gfc_error ("Pointer initialization requires a NULL() at %C");
4713 if (gfc_pure (NULL))
4715 gfc_error ("Initialization of pointer at %C is not allowed in "
4716 "a PURE procedure");
4721 gfc_free_expr (initializer);
4724 c->initializer = initializer;
4727 if (gfc_match_eos () == MATCH_YES)
4729 if (gfc_match_char (',') != MATCH_YES)
4734 gfc_error ("Syntax error in procedure pointer component at %C");
4739 /* Match a PROCEDURE declaration inside an interface (R1206). */
4742 match_procedure_in_interface (void)
4746 char name[GFC_MAX_SYMBOL_LEN + 1];
4748 if (current_interface.type == INTERFACE_NAMELESS
4749 || current_interface.type == INTERFACE_ABSTRACT)
4751 gfc_error ("PROCEDURE at %C must be in a generic interface");
4757 m = gfc_match_name (name);
4760 else if (m == MATCH_ERROR)
4762 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4765 if (gfc_add_interface (sym) == FAILURE)
4768 if (gfc_match_eos () == MATCH_YES)
4770 if (gfc_match_char (',') != MATCH_YES)
4777 gfc_error ("Syntax error in PROCEDURE statement at %C");
4782 /* General matcher for PROCEDURE declarations. */
4784 static match match_procedure_in_type (void);
4787 gfc_match_procedure (void)
4791 switch (gfc_current_state ())
4796 case COMP_SUBROUTINE:
4798 m = match_procedure_decl ();
4800 case COMP_INTERFACE:
4801 m = match_procedure_in_interface ();
4804 m = match_ppc_decl ();
4806 case COMP_DERIVED_CONTAINS:
4807 m = match_procedure_in_type ();
4816 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4824 /* Warn if a matched procedure has the same name as an intrinsic; this is
4825 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4826 parser-state-stack to find out whether we're in a module. */
4829 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4833 in_module = (gfc_state_stack->previous
4834 && gfc_state_stack->previous->state == COMP_MODULE);
4836 gfc_warn_intrinsic_shadow (sym, in_module, func);
4840 /* Match a function declaration. */
4843 gfc_match_function_decl (void)
4845 char name[GFC_MAX_SYMBOL_LEN + 1];
4846 gfc_symbol *sym, *result;
4850 match found_match; /* Status returned by match func. */
4852 if (gfc_current_state () != COMP_NONE
4853 && gfc_current_state () != COMP_INTERFACE
4854 && gfc_current_state () != COMP_CONTAINS)
4857 gfc_clear_ts (¤t_ts);
4859 old_loc = gfc_current_locus;
4861 m = gfc_match_prefix (¤t_ts);
4864 gfc_current_locus = old_loc;
4868 if (gfc_match ("function% %n", name) != MATCH_YES)
4870 gfc_current_locus = old_loc;
4873 if (get_proc_name (name, &sym, false))
4876 if (add_hidden_procptr_result (sym) == SUCCESS)
4879 gfc_new_block = sym;
4881 m = gfc_match_formal_arglist (sym, 0, 0);
4884 gfc_error ("Expected formal argument list in function "
4885 "definition at %C");
4889 else if (m == MATCH_ERROR)
4894 /* According to the draft, the bind(c) and result clause can
4895 come in either order after the formal_arg_list (i.e., either
4896 can be first, both can exist together or by themselves or neither
4897 one). Therefore, the match_result can't match the end of the
4898 string, and check for the bind(c) or result clause in either order. */
4899 found_match = gfc_match_eos ();
4901 /* Make sure that it isn't already declared as BIND(C). If it is, it
4902 must have been marked BIND(C) with a BIND(C) attribute and that is
4903 not allowed for procedures. */
4904 if (sym->attr.is_bind_c == 1)
4906 sym->attr.is_bind_c = 0;
4907 if (sym->old_symbol != NULL)
4908 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4909 "variables or common blocks",
4910 &(sym->old_symbol->declared_at));
4912 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4913 "variables or common blocks", &gfc_current_locus);
4916 if (found_match != MATCH_YES)
4918 /* If we haven't found the end-of-statement, look for a suffix. */
4919 suffix_match = gfc_match_suffix (sym, &result);
4920 if (suffix_match == MATCH_YES)
4921 /* Need to get the eos now. */
4922 found_match = gfc_match_eos ();
4924 found_match = suffix_match;
4927 if(found_match != MATCH_YES)
4931 /* Make changes to the symbol. */
4934 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4937 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4938 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4941 /* Delay matching the function characteristics until after the
4942 specification block by signalling kind=-1. */
4943 sym->declared_at = old_loc;
4944 if (current_ts.type != BT_UNKNOWN)
4945 current_ts.kind = -1;
4947 current_ts.kind = 0;
4951 if (current_ts.type != BT_UNKNOWN
4952 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4958 if (current_ts.type != BT_UNKNOWN
4959 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4962 sym->result = result;
4965 /* Warn if this procedure has the same name as an intrinsic. */
4966 warn_intrinsic_shadow (sym, true);
4972 gfc_current_locus = old_loc;
4977 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4978 pass the name of the entry, rather than the gfc_current_block name, and
4979 to return false upon finding an existing global entry. */
4982 add_global_entry (const char *name, int sub)
4985 enum gfc_symbol_type type;
4987 s = gfc_get_gsymbol(name);
4988 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4991 || (s->type != GSYM_UNKNOWN
4992 && s->type != type))
4993 gfc_global_used(s, NULL);
4997 s->where = gfc_current_locus;
4999 s->ns = gfc_current_ns;
5006 /* Match an ENTRY statement. */
5009 gfc_match_entry (void)
5014 char name[GFC_MAX_SYMBOL_LEN + 1];
5015 gfc_compile_state state;
5019 bool module_procedure;
5023 m = gfc_match_name (name);
5027 if (gfc_notify_std (GFC_STD_F2008_OBS, "Fortran 2008 obsolescent feature: "
5028 "ENTRY statement at %C") == FAILURE)
5031 state = gfc_current_state ();
5032 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
5037 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
5040 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
5042 case COMP_BLOCK_DATA:
5043 gfc_error ("ENTRY statement at %C cannot appear within "
5046 case COMP_INTERFACE:
5047 gfc_error ("ENTRY statement at %C cannot appear within "
5051 gfc_error ("ENTRY statement at %C cannot appear within "
5052 "a DERIVED TYPE block");
5055 gfc_error ("ENTRY statement at %C cannot appear within "
5056 "an IF-THEN block");
5059 gfc_error ("ENTRY statement at %C cannot appear within "
5063 gfc_error ("ENTRY statement at %C cannot appear within "
5067 gfc_error ("ENTRY statement at %C cannot appear within "
5071 gfc_error ("ENTRY statement at %C cannot appear within "
5075 gfc_error ("ENTRY statement at %C cannot appear within "
5076 "a contained subprogram");
5079 gfc_internal_error ("gfc_match_entry(): Bad state");
5084 module_procedure = gfc_current_ns->parent != NULL
5085 && gfc_current_ns->parent->proc_name
5086 && gfc_current_ns->parent->proc_name->attr.flavor
5089 if (gfc_current_ns->parent != NULL
5090 && gfc_current_ns->parent->proc_name
5091 && !module_procedure)
5093 gfc_error("ENTRY statement at %C cannot appear in a "
5094 "contained procedure");
5098 /* Module function entries need special care in get_proc_name
5099 because previous references within the function will have
5100 created symbols attached to the current namespace. */
5101 if (get_proc_name (name, &entry,
5102 gfc_current_ns->parent != NULL
5103 && module_procedure))
5106 proc = gfc_current_block ();
5108 /* Make sure that it isn't already declared as BIND(C). If it is, it
5109 must have been marked BIND(C) with a BIND(C) attribute and that is
5110 not allowed for procedures. */
5111 if (entry->attr.is_bind_c == 1)
5113 entry->attr.is_bind_c = 0;
5114 if (entry->old_symbol != NULL)
5115 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5116 "variables or common blocks",
5117 &(entry->old_symbol->declared_at));
5119 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5120 "variables or common blocks", &gfc_current_locus);
5123 /* Check what next non-whitespace character is so we can tell if there
5124 is the required parens if we have a BIND(C). */
5125 gfc_gobble_whitespace ();
5126 peek_char = gfc_peek_ascii_char ();
5128 if (state == COMP_SUBROUTINE)
5130 /* An entry in a subroutine. */
5131 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
5134 m = gfc_match_formal_arglist (entry, 0, 1);
5138 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5139 never be an internal procedure. */
5140 is_bind_c = gfc_match_bind_c (entry, true);
5141 if (is_bind_c == MATCH_ERROR)
5143 if (is_bind_c == MATCH_YES)
5145 if (peek_char != '(')
5147 gfc_error ("Missing required parentheses before BIND(C) at %C");
5150 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
5155 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5156 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
5161 /* An entry in a function.
5162 We need to take special care because writing
5167 ENTRY f() RESULT (r)
5169 ENTRY f RESULT (r). */
5170 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
5173 old_loc = gfc_current_locus;
5174 if (gfc_match_eos () == MATCH_YES)
5176 gfc_current_locus = old_loc;
5177 /* Match the empty argument list, and add the interface to
5179 m = gfc_match_formal_arglist (entry, 0, 1);
5182 m = gfc_match_formal_arglist (entry, 0, 0);
5189 if (gfc_match_eos () == MATCH_YES)
5191 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5192 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5195 entry->result = entry;
5199 m = gfc_match_suffix (entry, &result);
5201 gfc_syntax_error (ST_ENTRY);
5207 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5208 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5209 || gfc_add_function (&entry->attr, result->name, NULL)
5212 entry->result = result;
5216 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5217 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5219 entry->result = entry;
5224 if (gfc_match_eos () != MATCH_YES)
5226 gfc_syntax_error (ST_ENTRY);
5230 entry->attr.recursive = proc->attr.recursive;
5231 entry->attr.elemental = proc->attr.elemental;
5232 entry->attr.pure = proc->attr.pure;
5234 el = gfc_get_entry_list ();
5236 el->next = gfc_current_ns->entries;
5237 gfc_current_ns->entries = el;
5239 el->id = el->next->id + 1;
5243 new_st.op = EXEC_ENTRY;
5244 new_st.ext.entry = el;
5250 /* Match a subroutine statement, including optional prefixes. */
5253 gfc_match_subroutine (void)
5255 char name[GFC_MAX_SYMBOL_LEN + 1];
5260 bool allow_binding_name;
5262 if (gfc_current_state () != COMP_NONE
5263 && gfc_current_state () != COMP_INTERFACE
5264 && gfc_current_state () != COMP_CONTAINS)
5267 m = gfc_match_prefix (NULL);
5271 m = gfc_match ("subroutine% %n", name);
5275 if (get_proc_name (name, &sym, false))
5278 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5279 the symbol existed before. */
5280 sym->declared_at = gfc_current_locus;
5282 if (add_hidden_procptr_result (sym) == SUCCESS)
5285 gfc_new_block = sym;
5287 /* Check what next non-whitespace character is so we can tell if there
5288 is the required parens if we have a BIND(C). */
5289 gfc_gobble_whitespace ();
5290 peek_char = gfc_peek_ascii_char ();
5292 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5295 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5298 /* Make sure that it isn't already declared as BIND(C). If it is, it
5299 must have been marked BIND(C) with a BIND(C) attribute and that is
5300 not allowed for procedures. */
5301 if (sym->attr.is_bind_c == 1)
5303 sym->attr.is_bind_c = 0;
5304 if (sym->old_symbol != NULL)
5305 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5306 "variables or common blocks",
5307 &(sym->old_symbol->declared_at));
5309 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5310 "variables or common blocks", &gfc_current_locus);
5313 /* C binding names are not allowed for internal procedures. */
5314 if (gfc_current_state () == COMP_CONTAINS
5315 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5316 allow_binding_name = false;
5318 allow_binding_name = true;
5320 /* Here, we are just checking if it has the bind(c) attribute, and if
5321 so, then we need to make sure it's all correct. If it doesn't,
5322 we still need to continue matching the rest of the subroutine line. */
5323 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5324 if (is_bind_c == MATCH_ERROR)
5326 /* There was an attempt at the bind(c), but it was wrong. An
5327 error message should have been printed w/in the gfc_match_bind_c
5328 so here we'll just return the MATCH_ERROR. */
5332 if (is_bind_c == MATCH_YES)
5334 /* The following is allowed in the Fortran 2008 draft. */
5335 if (gfc_current_state () == COMP_CONTAINS
5336 && sym->ns->proc_name->attr.flavor != FL_MODULE
5337 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5338 "at %L may not be specified for an internal "
5339 "procedure", &gfc_current_locus)
5343 if (peek_char != '(')
5345 gfc_error ("Missing required parentheses before BIND(C) at %C");
5348 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5353 if (gfc_match_eos () != MATCH_YES)
5355 gfc_syntax_error (ST_SUBROUTINE);
5359 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5362 /* Warn if it has the same name as an intrinsic. */
5363 warn_intrinsic_shadow (sym, false);
5369 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5370 given, and set the binding label in either the given symbol (if not
5371 NULL), or in the current_ts. The symbol may be NULL because we may
5372 encounter the BIND(C) before the declaration itself. Return
5373 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5374 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5375 or MATCH_YES if the specifier was correct and the binding label and
5376 bind(c) fields were set correctly for the given symbol or the
5377 current_ts. If allow_binding_name is false, no binding name may be
5381 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5383 /* binding label, if exists */
5384 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5388 /* Initialize the flag that specifies whether we encountered a NAME=
5389 specifier or not. */
5390 has_name_equals = 0;
5392 /* Init the first char to nil so we can catch if we don't have
5393 the label (name attr) or the symbol name yet. */
5394 binding_label[0] = '\0';
5396 /* This much we have to be able to match, in this order, if
5397 there is a bind(c) label. */
5398 if (gfc_match (" bind ( c ") != MATCH_YES)
5401 /* Now see if there is a binding label, or if we've reached the
5402 end of the bind(c) attribute without one. */
5403 if (gfc_match_char (',') == MATCH_YES)
5405 if (gfc_match (" name = ") != MATCH_YES)
5407 gfc_error ("Syntax error in NAME= specifier for binding label "
5409 /* should give an error message here */
5413 has_name_equals = 1;
5415 /* Get the opening quote. */
5416 double_quote = MATCH_YES;
5417 single_quote = MATCH_YES;
5418 double_quote = gfc_match_char ('"');
5419 if (double_quote != MATCH_YES)
5420 single_quote = gfc_match_char ('\'');
5421 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5423 gfc_error ("Syntax error in NAME= specifier for binding label "
5428 /* Grab the binding label, using functions that will not lower
5429 case the names automatically. */
5430 if (gfc_match_name_C (binding_label) != MATCH_YES)
5433 /* Get the closing quotation. */
5434 if (double_quote == MATCH_YES)
5436 if (gfc_match_char ('"') != MATCH_YES)
5438 gfc_error ("Missing closing quote '\"' for binding label at %C");
5439 /* User started string with '"' so looked to match it. */
5445 if (gfc_match_char ('\'') != MATCH_YES)
5447 gfc_error ("Missing closing quote '\'' for binding label at %C");
5448 /* User started string with "'" char. */
5454 /* Get the required right paren. */
5455 if (gfc_match_char (')') != MATCH_YES)
5457 gfc_error ("Missing closing paren for binding label at %C");
5461 if (has_name_equals && !allow_binding_name)
5463 gfc_error ("No binding name is allowed in BIND(C) at %C");
5467 if (has_name_equals && sym != NULL && sym->attr.dummy)
5469 gfc_error ("For dummy procedure %s, no binding name is "
5470 "allowed in BIND(C) at %C", sym->name);
5475 /* Save the binding label to the symbol. If sym is null, we're
5476 probably matching the typespec attributes of a declaration and
5477 haven't gotten the name yet, and therefore, no symbol yet. */
5478 if (binding_label[0] != '\0')
5482 strcpy (sym->binding_label, binding_label);
5485 strcpy (curr_binding_label, binding_label);
5487 else if (allow_binding_name)
5489 /* No binding label, but if symbol isn't null, we
5490 can set the label for it here.
5491 If name="" or allow_binding_name is false, no C binding name is
5493 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5494 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5497 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5498 && current_interface.type == INTERFACE_ABSTRACT)
5500 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5508 /* Return nonzero if we're currently compiling a contained procedure. */
5511 contained_procedure (void)
5513 gfc_state_data *s = gfc_state_stack;
5515 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5516 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5522 /* Set the kind of each enumerator. The kind is selected such that it is
5523 interoperable with the corresponding C enumeration type, making
5524 sure that -fshort-enums is honored. */
5529 enumerator_history *current_history = NULL;
5533 if (max_enum == NULL || enum_history == NULL)
5536 if (!flag_short_enums)
5542 kind = gfc_integer_kinds[i++].kind;
5544 while (kind < gfc_c_int_kind
5545 && gfc_check_integer_range (max_enum->initializer->value.integer,
5548 current_history = enum_history;
5549 while (current_history != NULL)
5551 current_history->sym->ts.kind = kind;
5552 current_history = current_history->next;
5557 /* Match any of the various end-block statements. Returns the type of
5558 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5559 and END BLOCK statements cannot be replaced by a single END statement. */
5562 gfc_match_end (gfc_statement *st)
5564 char name[GFC_MAX_SYMBOL_LEN + 1];
5565 gfc_compile_state state;
5567 const char *block_name;
5572 old_loc = gfc_current_locus;
5573 if (gfc_match ("end") != MATCH_YES)
5576 state = gfc_current_state ();
5577 block_name = gfc_current_block () == NULL
5578 ? NULL : gfc_current_block ()->name;
5582 case COMP_ASSOCIATE:
5584 if (!strcmp (block_name, "block@"))
5589 case COMP_DERIVED_CONTAINS:
5590 state = gfc_state_stack->previous->state;
5591 block_name = gfc_state_stack->previous->sym == NULL
5592 ? NULL : gfc_state_stack->previous->sym->name;
5603 *st = ST_END_PROGRAM;
5604 target = " program";
5608 case COMP_SUBROUTINE:
5609 *st = ST_END_SUBROUTINE;
5610 target = " subroutine";
5611 eos_ok = !contained_procedure ();
5615 *st = ST_END_FUNCTION;
5616 target = " function";
5617 eos_ok = !contained_procedure ();
5620 case COMP_BLOCK_DATA:
5621 *st = ST_END_BLOCK_DATA;
5622 target = " block data";
5627 *st = ST_END_MODULE;
5632 case COMP_INTERFACE:
5633 *st = ST_END_INTERFACE;
5634 target = " interface";
5639 case COMP_DERIVED_CONTAINS:
5645 case COMP_ASSOCIATE:
5646 *st = ST_END_ASSOCIATE;
5647 target = " associate";
5670 *st = ST_END_CRITICAL;
5671 target = " critical";
5676 case COMP_SELECT_TYPE:
5677 *st = ST_END_SELECT;
5683 *st = ST_END_FORALL;
5698 last_initializer = NULL;
5700 gfc_free_enum_history ();
5704 gfc_error ("Unexpected END statement at %C");
5708 if (gfc_match_eos () == MATCH_YES)
5710 if (!eos_ok && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION))
5712 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: END statement "
5713 "instead of %s statement at %L",
5714 gfc_ascii_statement (*st), &old_loc) == FAILURE)
5719 /* We would have required END [something]. */
5720 gfc_error ("%s statement expected at %L",
5721 gfc_ascii_statement (*st), &old_loc);
5728 /* Verify that we've got the sort of end-block that we're expecting. */
5729 if (gfc_match (target) != MATCH_YES)
5731 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5735 /* If we're at the end, make sure a block name wasn't required. */
5736 if (gfc_match_eos () == MATCH_YES)
5739 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5740 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK
5741 && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL)
5747 gfc_error ("Expected block name of '%s' in %s statement at %C",
5748 block_name, gfc_ascii_statement (*st));
5753 /* END INTERFACE has a special handler for its several possible endings. */
5754 if (*st == ST_END_INTERFACE)
5755 return gfc_match_end_interface ();
5757 /* We haven't hit the end of statement, so what is left must be an
5759 m = gfc_match_space ();
5761 m = gfc_match_name (name);
5764 gfc_error ("Expected terminating name at %C");
5768 if (block_name == NULL)
5771 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5773 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5774 gfc_ascii_statement (*st));
5777 /* Procedure pointer as function result. */
5778 else if (strcmp (block_name, "ppr@") == 0
5779 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5781 gfc_error ("Expected label '%s' for %s statement at %C",
5782 gfc_current_block ()->ns->proc_name->name,
5783 gfc_ascii_statement (*st));
5787 if (gfc_match_eos () == MATCH_YES)
5791 gfc_syntax_error (*st);
5794 gfc_current_locus = old_loc;
5800 /***************** Attribute declaration statements ****************/
5802 /* Set the attribute of a single variable. */
5807 char name[GFC_MAX_SYMBOL_LEN + 1];
5815 m = gfc_match_name (name);
5819 if (find_special (name, &sym, false))
5822 var_locus = gfc_current_locus;
5824 /* Deal with possible array specification for certain attributes. */
5825 if (current_attr.dimension
5826 || current_attr.codimension
5827 || current_attr.allocatable
5828 || current_attr.pointer
5829 || current_attr.target)
5831 m = gfc_match_array_spec (&as, !current_attr.codimension,
5832 !current_attr.dimension
5833 && !current_attr.pointer
5834 && !current_attr.target);
5835 if (m == MATCH_ERROR)
5838 if (current_attr.dimension && m == MATCH_NO)
5840 gfc_error ("Missing array specification at %L in DIMENSION "
5841 "statement", &var_locus);
5846 if (current_attr.dimension && sym->value)
5848 gfc_error ("Dimensions specified for %s at %L after its "
5849 "initialisation", sym->name, &var_locus);
5854 if (current_attr.codimension && m == MATCH_NO)
5856 gfc_error ("Missing array specification at %L in CODIMENSION "
5857 "statement", &var_locus);
5862 if ((current_attr.allocatable || current_attr.pointer)
5863 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5865 gfc_error ("Array specification must be deferred at %L", &var_locus);
5871 /* Update symbol table. DIMENSION attribute is set in
5872 gfc_set_array_spec(). For CLASS variables, this must be applied
5873 to the first component, or '$data' field. */
5874 if (sym->ts.type == BT_CLASS && sym->ts.u.derived->attr.is_class)
5876 if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr,&var_locus)
5885 if (current_attr.dimension == 0 && current_attr.codimension == 0
5886 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5893 if (sym->ts.type == BT_CLASS && !sym->attr.class_ok
5894 && (sym->attr.class_ok = sym->attr.class_ok || current_attr.allocatable
5895 || current_attr.pointer))
5896 gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false);
5898 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5904 if (sym->attr.cray_pointee && sym->as != NULL)
5906 /* Fix the array spec. */
5907 m = gfc_mod_pointee_as (sym->as);
5908 if (m == MATCH_ERROR)
5912 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5918 if ((current_attr.external || current_attr.intrinsic)
5919 && sym->attr.flavor != FL_PROCEDURE
5920 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5926 add_hidden_procptr_result (sym);
5931 gfc_free_array_spec (as);
5936 /* Generic attribute declaration subroutine. Used for attributes that
5937 just have a list of names. */
5944 /* Gobble the optional double colon, by simply ignoring the result
5954 if (gfc_match_eos () == MATCH_YES)
5960 if (gfc_match_char (',') != MATCH_YES)
5962 gfc_error ("Unexpected character in variable list at %C");
5972 /* This routine matches Cray Pointer declarations of the form:
5973 pointer ( <pointer>, <pointee> )
5975 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5976 The pointer, if already declared, should be an integer. Otherwise, we
5977 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5978 be either a scalar, or an array declaration. No space is allocated for
5979 the pointee. For the statement
5980 pointer (ipt, ar(10))
5981 any subsequent uses of ar will be translated (in C-notation) as
5982 ar(i) => ((<type> *) ipt)(i)
5983 After gimplification, pointee variable will disappear in the code. */
5986 cray_pointer_decl (void)
5989 gfc_array_spec *as = NULL;
5990 gfc_symbol *cptr; /* Pointer symbol. */
5991 gfc_symbol *cpte; /* Pointee symbol. */
5997 if (gfc_match_char ('(') != MATCH_YES)
5999 gfc_error ("Expected '(' at %C");
6003 /* Match pointer. */
6004 var_locus = gfc_current_locus;
6005 gfc_clear_attr (¤t_attr);
6006 gfc_add_cray_pointer (¤t_attr, &var_locus);
6007 current_ts.type = BT_INTEGER;
6008 current_ts.kind = gfc_index_integer_kind;
6010 m = gfc_match_symbol (&cptr, 0);
6013 gfc_error ("Expected variable name at %C");
6017 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
6020 gfc_set_sym_referenced (cptr);
6022 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
6024 cptr->ts.type = BT_INTEGER;
6025 cptr->ts.kind = gfc_index_integer_kind;
6027 else if (cptr->ts.type != BT_INTEGER)
6029 gfc_error ("Cray pointer at %C must be an integer");
6032 else if (cptr->ts.kind < gfc_index_integer_kind)
6033 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
6034 " memory addresses require %d bytes",
6035 cptr->ts.kind, gfc_index_integer_kind);
6037 if (gfc_match_char (',') != MATCH_YES)
6039 gfc_error ("Expected \",\" at %C");
6043 /* Match Pointee. */
6044 var_locus = gfc_current_locus;
6045 gfc_clear_attr (¤t_attr);
6046 gfc_add_cray_pointee (¤t_attr, &var_locus);
6047 current_ts.type = BT_UNKNOWN;
6048 current_ts.kind = 0;
6050 m = gfc_match_symbol (&cpte, 0);
6053 gfc_error ("Expected variable name at %C");
6057 /* Check for an optional array spec. */
6058 m = gfc_match_array_spec (&as, true, false);
6059 if (m == MATCH_ERROR)
6061 gfc_free_array_spec (as);
6064 else if (m == MATCH_NO)
6066 gfc_free_array_spec (as);
6070 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
6073 gfc_set_sym_referenced (cpte);
6075 if (cpte->as == NULL)
6077 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
6078 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6080 else if (as != NULL)
6082 gfc_error ("Duplicate array spec for Cray pointee at %C");
6083 gfc_free_array_spec (as);
6089 if (cpte->as != NULL)
6091 /* Fix array spec. */
6092 m = gfc_mod_pointee_as (cpte->as);
6093 if (m == MATCH_ERROR)
6097 /* Point the Pointee at the Pointer. */
6098 cpte->cp_pointer = cptr;
6100 if (gfc_match_char (')') != MATCH_YES)
6102 gfc_error ("Expected \")\" at %C");
6105 m = gfc_match_char (',');
6107 done = true; /* Stop searching for more declarations. */
6111 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
6112 || gfc_match_eos () != MATCH_YES)
6114 gfc_error ("Expected \",\" or end of statement at %C");
6122 gfc_match_external (void)
6125 gfc_clear_attr (¤t_attr);
6126 current_attr.external = 1;
6128 return attr_decl ();
6133 gfc_match_intent (void)
6137 /* This is not allowed within a BLOCK construct! */
6138 if (gfc_current_state () == COMP_BLOCK)
6140 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6144 intent = match_intent_spec ();
6145 if (intent == INTENT_UNKNOWN)
6148 gfc_clear_attr (¤t_attr);
6149 current_attr.intent = intent;
6151 return attr_decl ();
6156 gfc_match_intrinsic (void)
6159 gfc_clear_attr (¤t_attr);
6160 current_attr.intrinsic = 1;
6162 return attr_decl ();
6167 gfc_match_optional (void)
6169 /* This is not allowed within a BLOCK construct! */
6170 if (gfc_current_state () == COMP_BLOCK)
6172 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6176 gfc_clear_attr (¤t_attr);
6177 current_attr.optional = 1;
6179 return attr_decl ();
6184 gfc_match_pointer (void)
6186 gfc_gobble_whitespace ();
6187 if (gfc_peek_ascii_char () == '(')
6189 if (!gfc_option.flag_cray_pointer)
6191 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6195 return cray_pointer_decl ();
6199 gfc_clear_attr (¤t_attr);
6200 current_attr.pointer = 1;
6202 return attr_decl ();
6208 gfc_match_allocatable (void)
6210 gfc_clear_attr (¤t_attr);
6211 current_attr.allocatable = 1;
6213 return attr_decl ();
6218 gfc_match_codimension (void)
6220 gfc_clear_attr (¤t_attr);
6221 current_attr.codimension = 1;
6223 return attr_decl ();
6228 gfc_match_contiguous (void)
6230 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CONTIGUOUS statement at %C")
6234 gfc_clear_attr (¤t_attr);
6235 current_attr.contiguous = 1;
6237 return attr_decl ();
6242 gfc_match_dimension (void)
6244 gfc_clear_attr (¤t_attr);
6245 current_attr.dimension = 1;
6247 return attr_decl ();
6252 gfc_match_target (void)
6254 gfc_clear_attr (¤t_attr);
6255 current_attr.target = 1;
6257 return attr_decl ();
6261 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6265 access_attr_decl (gfc_statement st)
6267 char name[GFC_MAX_SYMBOL_LEN + 1];
6268 interface_type type;
6271 gfc_intrinsic_op op;
6274 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6279 m = gfc_match_generic_spec (&type, name, &op);
6282 if (m == MATCH_ERROR)
6287 case INTERFACE_NAMELESS:
6288 case INTERFACE_ABSTRACT:
6291 case INTERFACE_GENERIC:
6292 if (gfc_get_symbol (name, NULL, &sym))
6295 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6296 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6297 sym->name, NULL) == FAILURE)
6302 case INTERFACE_INTRINSIC_OP:
6303 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6305 gfc_current_ns->operator_access[op] =
6306 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6310 gfc_error ("Access specification of the %s operator at %C has "
6311 "already been specified", gfc_op2string (op));
6317 case INTERFACE_USER_OP:
6318 uop = gfc_get_uop (name);
6320 if (uop->access == ACCESS_UNKNOWN)
6322 uop->access = (st == ST_PUBLIC)
6323 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6327 gfc_error ("Access specification of the .%s. operator at %C "
6328 "has already been specified", sym->name);
6335 if (gfc_match_char (',') == MATCH_NO)
6339 if (gfc_match_eos () != MATCH_YES)
6344 gfc_syntax_error (st);
6352 gfc_match_protected (void)
6357 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6359 gfc_error ("PROTECTED at %C only allowed in specification "
6360 "part of a module");
6365 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6369 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6374 if (gfc_match_eos () == MATCH_YES)
6379 m = gfc_match_symbol (&sym, 0);
6383 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6396 if (gfc_match_eos () == MATCH_YES)
6398 if (gfc_match_char (',') != MATCH_YES)
6405 gfc_error ("Syntax error in PROTECTED statement at %C");
6410 /* The PRIVATE statement is a bit weird in that it can be an attribute
6411 declaration, but also works as a standalone statement inside of a
6412 type declaration or a module. */
6415 gfc_match_private (gfc_statement *st)
6418 if (gfc_match ("private") != MATCH_YES)
6421 if (gfc_current_state () != COMP_MODULE
6422 && !(gfc_current_state () == COMP_DERIVED
6423 && gfc_state_stack->previous
6424 && gfc_state_stack->previous->state == COMP_MODULE)
6425 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6426 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6427 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6429 gfc_error ("PRIVATE statement at %C is only allowed in the "
6430 "specification part of a module");
6434 if (gfc_current_state () == COMP_DERIVED)
6436 if (gfc_match_eos () == MATCH_YES)
6442 gfc_syntax_error (ST_PRIVATE);
6446 if (gfc_match_eos () == MATCH_YES)
6453 return access_attr_decl (ST_PRIVATE);
6458 gfc_match_public (gfc_statement *st)
6461 if (gfc_match ("public") != MATCH_YES)
6464 if (gfc_current_state () != COMP_MODULE)
6466 gfc_error ("PUBLIC statement at %C is only allowed in the "
6467 "specification part of a module");
6471 if (gfc_match_eos () == MATCH_YES)
6478 return access_attr_decl (ST_PUBLIC);
6482 /* Workhorse for gfc_match_parameter. */
6492 m = gfc_match_symbol (&sym, 0);
6494 gfc_error ("Expected variable name at %C in PARAMETER statement");
6499 if (gfc_match_char ('=') == MATCH_NO)
6501 gfc_error ("Expected = sign in PARAMETER statement at %C");
6505 m = gfc_match_init_expr (&init);
6507 gfc_error ("Expected expression at %C in PARAMETER statement");
6511 if (sym->ts.type == BT_UNKNOWN
6512 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6518 if (gfc_check_assign_symbol (sym, init) == FAILURE
6519 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6527 gfc_error ("Initializing already initialized variable at %C");
6532 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6533 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6536 gfc_free_expr (init);
6541 /* Match a parameter statement, with the weird syntax that these have. */
6544 gfc_match_parameter (void)
6548 if (gfc_match_char ('(') == MATCH_NO)
6557 if (gfc_match (" )%t") == MATCH_YES)
6560 if (gfc_match_char (',') != MATCH_YES)
6562 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6572 /* Save statements have a special syntax. */
6575 gfc_match_save (void)
6577 char n[GFC_MAX_SYMBOL_LEN+1];
6582 if (gfc_match_eos () == MATCH_YES)
6584 if (gfc_current_ns->seen_save)
6586 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6587 "follows previous SAVE statement")
6592 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6596 if (gfc_current_ns->save_all)
6598 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6599 "blanket SAVE statement")
6608 m = gfc_match_symbol (&sym, 0);
6612 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6624 m = gfc_match (" / %n /", &n);
6625 if (m == MATCH_ERROR)
6630 c = gfc_get_common (n, 0);
6633 gfc_current_ns->seen_save = 1;
6636 if (gfc_match_eos () == MATCH_YES)
6638 if (gfc_match_char (',') != MATCH_YES)
6645 gfc_error ("Syntax error in SAVE statement at %C");
6651 gfc_match_value (void)
6656 /* This is not allowed within a BLOCK construct! */
6657 if (gfc_current_state () == COMP_BLOCK)
6659 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6663 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6667 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6672 if (gfc_match_eos () == MATCH_YES)
6677 m = gfc_match_symbol (&sym, 0);
6681 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6694 if (gfc_match_eos () == MATCH_YES)
6696 if (gfc_match_char (',') != MATCH_YES)
6703 gfc_error ("Syntax error in VALUE statement at %C");
6709 gfc_match_volatile (void)
6714 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6718 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6723 if (gfc_match_eos () == MATCH_YES)
6728 /* VOLATILE is special because it can be added to host-associated
6729 symbols locally. Except for coarrays. */
6730 m = gfc_match_symbol (&sym, 1);
6734 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
6735 for variable in a BLOCK which is defined outside of the BLOCK. */
6736 if (sym->ns != gfc_current_ns && sym->attr.codimension)
6738 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
6739 "%C, which is use-/host-associated", sym->name);
6742 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6755 if (gfc_match_eos () == MATCH_YES)
6757 if (gfc_match_char (',') != MATCH_YES)
6764 gfc_error ("Syntax error in VOLATILE statement at %C");
6770 gfc_match_asynchronous (void)
6775 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C")
6779 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6784 if (gfc_match_eos () == MATCH_YES)
6789 /* ASYNCHRONOUS is special because it can be added to host-associated
6791 m = gfc_match_symbol (&sym, 1);
6795 if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)
6808 if (gfc_match_eos () == MATCH_YES)
6810 if (gfc_match_char (',') != MATCH_YES)
6817 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6822 /* Match a module procedure statement. Note that we have to modify
6823 symbols in the parent's namespace because the current one was there
6824 to receive symbols that are in an interface's formal argument list. */
6827 gfc_match_modproc (void)
6829 char name[GFC_MAX_SYMBOL_LEN + 1];
6832 gfc_namespace *module_ns;
6833 gfc_interface *old_interface_head, *interface;
6835 if (gfc_state_stack->state != COMP_INTERFACE
6836 || gfc_state_stack->previous == NULL
6837 || current_interface.type == INTERFACE_NAMELESS
6838 || current_interface.type == INTERFACE_ABSTRACT)
6840 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6845 module_ns = gfc_current_ns->parent;
6846 for (; module_ns; module_ns = module_ns->parent)
6847 if (module_ns->proc_name->attr.flavor == FL_MODULE
6848 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6849 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6850 && !module_ns->proc_name->attr.contained))
6853 if (module_ns == NULL)
6856 /* Store the current state of the interface. We will need it if we
6857 end up with a syntax error and need to recover. */
6858 old_interface_head = gfc_current_interface_head ();
6862 locus old_locus = gfc_current_locus;
6865 m = gfc_match_name (name);
6871 /* Check for syntax error before starting to add symbols to the
6872 current namespace. */
6873 if (gfc_match_eos () == MATCH_YES)
6875 if (!last && gfc_match_char (',') != MATCH_YES)
6878 /* Now we're sure the syntax is valid, we process this item
6880 if (gfc_get_symbol (name, module_ns, &sym))
6883 if (sym->attr.intrinsic)
6885 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6886 "PROCEDURE", &old_locus);
6890 if (sym->attr.proc != PROC_MODULE
6891 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6892 sym->name, NULL) == FAILURE)
6895 if (gfc_add_interface (sym) == FAILURE)
6898 sym->attr.mod_proc = 1;
6899 sym->declared_at = old_locus;
6908 /* Restore the previous state of the interface. */
6909 interface = gfc_current_interface_head ();
6910 gfc_set_current_interface_head (old_interface_head);
6912 /* Free the new interfaces. */
6913 while (interface != old_interface_head)
6915 gfc_interface *i = interface->next;
6916 gfc_free (interface);
6920 /* And issue a syntax error. */
6921 gfc_syntax_error (ST_MODULE_PROC);
6926 /* Check a derived type that is being extended. */
6928 check_extended_derived_type (char *name)
6930 gfc_symbol *extended;
6932 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6934 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6940 gfc_error ("No such symbol in TYPE definition at %C");
6944 if (extended->attr.flavor != FL_DERIVED)
6946 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6947 "derived type", name);
6951 if (extended->attr.is_bind_c)
6953 gfc_error ("'%s' cannot be extended at %C because it "
6954 "is BIND(C)", extended->name);
6958 if (extended->attr.sequence)
6960 gfc_error ("'%s' cannot be extended at %C because it "
6961 "is a SEQUENCE type", extended->name);
6969 /* Match the optional attribute specifiers for a type declaration.
6970 Return MATCH_ERROR if an error is encountered in one of the handled
6971 attributes (public, private, bind(c)), MATCH_NO if what's found is
6972 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6973 checking on attribute conflicts needs to be done. */
6976 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6978 /* See if the derived type is marked as private. */
6979 if (gfc_match (" , private") == MATCH_YES)
6981 if (gfc_current_state () != COMP_MODULE)
6983 gfc_error ("Derived type at %C can only be PRIVATE in the "
6984 "specification part of a module");
6988 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6991 else if (gfc_match (" , public") == MATCH_YES)
6993 if (gfc_current_state () != COMP_MODULE)
6995 gfc_error ("Derived type at %C can only be PUBLIC in the "
6996 "specification part of a module");
7000 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
7003 else if (gfc_match (" , bind ( c )") == MATCH_YES)
7005 /* If the type is defined to be bind(c) it then needs to make
7006 sure that all fields are interoperable. This will
7007 need to be a semantic check on the finished derived type.
7008 See 15.2.3 (lines 9-12) of F2003 draft. */
7009 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
7012 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
7014 else if (gfc_match (" , abstract") == MATCH_YES)
7016 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
7020 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
7023 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
7025 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
7031 /* If we get here, something matched. */
7036 /* Assign a hash value for a derived type. The algorithm is that of
7037 SDBM. The hashed string is '[module_name #] derived_name'. */
7039 hash_value (gfc_symbol *sym)
7041 unsigned int hash = 0;
7045 /* Hash of the module or procedure name. */
7046 if (sym->module != NULL)
7048 else if (sym->ns && sym->ns->proc_name
7049 && sym->ns->proc_name->attr.flavor == FL_MODULE)
7050 c = sym->ns->proc_name->name;
7057 for (i = 0; i < len; i++, c++)
7058 hash = (hash << 6) + (hash << 16) - hash + (*c);
7060 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
7061 hash = (hash << 6) + (hash << 16) - hash + '#';
7064 /* Hash of the derived type name. */
7065 len = strlen (sym->name);
7067 for (i = 0; i < len; i++, c++)
7068 hash = (hash << 6) + (hash << 16) - hash + (*c);
7070 /* Return the hash but take the modulus for the sake of module read,
7071 even though this slightly increases the chance of collision. */
7072 return (hash % 100000000);
7076 /* Match the beginning of a derived type declaration. If a type name
7077 was the result of a function, then it is possible to have a symbol
7078 already to be known as a derived type yet have no components. */
7081 gfc_match_derived_decl (void)
7083 char name[GFC_MAX_SYMBOL_LEN + 1];
7084 char parent[GFC_MAX_SYMBOL_LEN + 1];
7085 symbol_attribute attr;
7087 gfc_symbol *extended;
7089 match is_type_attr_spec = MATCH_NO;
7090 bool seen_attr = false;
7092 if (gfc_current_state () == COMP_DERIVED)
7097 gfc_clear_attr (&attr);
7102 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
7103 if (is_type_attr_spec == MATCH_ERROR)
7105 if (is_type_attr_spec == MATCH_YES)
7107 } while (is_type_attr_spec == MATCH_YES);
7109 /* Deal with derived type extensions. The extension attribute has
7110 been added to 'attr' but now the parent type must be found and
7113 extended = check_extended_derived_type (parent);
7115 if (parent[0] && !extended)
7118 if (gfc_match (" ::") != MATCH_YES && seen_attr)
7120 gfc_error ("Expected :: in TYPE definition at %C");
7124 m = gfc_match (" %n%t", name);
7128 /* Make sure the name is not the name of an intrinsic type. */
7129 if (gfc_is_intrinsic_typename (name))
7131 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7136 if (gfc_get_symbol (name, NULL, &sym))
7139 if (sym->ts.type != BT_UNKNOWN)
7141 gfc_error ("Derived type name '%s' at %C already has a basic type "
7142 "of %s", sym->name, gfc_typename (&sym->ts));
7146 /* The symbol may already have the derived attribute without the
7147 components. The ways this can happen is via a function
7148 definition, an INTRINSIC statement or a subtype in another
7149 derived type that is a pointer. The first part of the AND clause
7150 is true if the symbol is not the return value of a function. */
7151 if (sym->attr.flavor != FL_DERIVED
7152 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
7155 if (sym->components != NULL || sym->attr.zero_comp)
7157 gfc_error ("Derived type definition of '%s' at %C has already been "
7158 "defined", sym->name);
7162 if (attr.access != ACCESS_UNKNOWN
7163 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
7166 /* See if the derived type was labeled as bind(c). */
7167 if (attr.is_bind_c != 0)
7168 sym->attr.is_bind_c = attr.is_bind_c;
7170 /* Construct the f2k_derived namespace if it is not yet there. */
7171 if (!sym->f2k_derived)
7172 sym->f2k_derived = gfc_get_namespace (NULL, 0);
7174 if (extended && !sym->components)
7179 /* Add the extended derived type as the first component. */
7180 gfc_add_component (sym, parent, &p);
7182 gfc_set_sym_referenced (extended);
7184 p->ts.type = BT_DERIVED;
7185 p->ts.u.derived = extended;
7186 p->initializer = gfc_default_initializer (&p->ts);
7188 /* Set extension level. */
7189 if (extended->attr.extension == 255)
7191 /* Since the extension field is 8 bit wide, we can only have
7192 up to 255 extension levels. */
7193 gfc_error ("Maximum extension level reached with type '%s' at %L",
7194 extended->name, &extended->declared_at);
7197 sym->attr.extension = extended->attr.extension + 1;
7199 /* Provide the links between the extended type and its extension. */
7200 if (!extended->f2k_derived)
7201 extended->f2k_derived = gfc_get_namespace (NULL, 0);
7202 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
7206 if (!sym->hash_value)
7207 /* Set the hash for the compound name for this type. */
7208 sym->hash_value = hash_value (sym);
7210 /* Take over the ABSTRACT attribute. */
7211 sym->attr.abstract = attr.abstract;
7213 gfc_new_block = sym;
7219 /* Cray Pointees can be declared as:
7220 pointer (ipt, a (n,m,...,*)) */
7223 gfc_mod_pointee_as (gfc_array_spec *as)
7225 as->cray_pointee = true; /* This will be useful to know later. */
7226 if (as->type == AS_ASSUMED_SIZE)
7227 as->cp_was_assumed = true;
7228 else if (as->type == AS_ASSUMED_SHAPE)
7230 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7237 /* Match the enum definition statement, here we are trying to match
7238 the first line of enum definition statement.
7239 Returns MATCH_YES if match is found. */
7242 gfc_match_enum (void)
7246 m = gfc_match_eos ();
7250 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
7258 /* Returns an initializer whose value is one higher than the value of the
7259 LAST_INITIALIZER argument. If the argument is NULL, the
7260 initializers value will be set to zero. The initializer's kind
7261 will be set to gfc_c_int_kind.
7263 If -fshort-enums is given, the appropriate kind will be selected
7264 later after all enumerators have been parsed. A warning is issued
7265 here if an initializer exceeds gfc_c_int_kind. */
7268 enum_initializer (gfc_expr *last_initializer, locus where)
7271 result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where);
7273 mpz_init (result->value.integer);
7275 if (last_initializer != NULL)
7277 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
7278 result->where = last_initializer->where;
7280 if (gfc_check_integer_range (result->value.integer,
7281 gfc_c_int_kind) != ARITH_OK)
7283 gfc_error ("Enumerator exceeds the C integer type at %C");
7289 /* Control comes here, if it's the very first enumerator and no
7290 initializer has been given. It will be initialized to zero. */
7291 mpz_set_si (result->value.integer, 0);
7298 /* Match a variable name with an optional initializer. When this
7299 subroutine is called, a variable is expected to be parsed next.
7300 Depending on what is happening at the moment, updates either the
7301 symbol table or the current interface. */
7304 enumerator_decl (void)
7306 char name[GFC_MAX_SYMBOL_LEN + 1];
7307 gfc_expr *initializer;
7308 gfc_array_spec *as = NULL;
7316 old_locus = gfc_current_locus;
7318 /* When we get here, we've just matched a list of attributes and
7319 maybe a type and a double colon. The next thing we expect to see
7320 is the name of the symbol. */
7321 m = gfc_match_name (name);
7325 var_locus = gfc_current_locus;
7327 /* OK, we've successfully matched the declaration. Now put the
7328 symbol in the current namespace. If we fail to create the symbol,
7330 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7336 /* The double colon must be present in order to have initializers.
7337 Otherwise the statement is ambiguous with an assignment statement. */
7340 if (gfc_match_char ('=') == MATCH_YES)
7342 m = gfc_match_init_expr (&initializer);
7345 gfc_error ("Expected an initialization expression at %C");
7354 /* If we do not have an initializer, the initialization value of the
7355 previous enumerator (stored in last_initializer) is incremented
7356 by 1 and is used to initialize the current enumerator. */
7357 if (initializer == NULL)
7358 initializer = enum_initializer (last_initializer, old_locus);
7360 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7362 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7368 /* Store this current initializer, for the next enumerator variable
7369 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7370 use last_initializer below. */
7371 last_initializer = initializer;
7372 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7374 /* Maintain enumerator history. */
7375 gfc_find_symbol (name, NULL, 0, &sym);
7376 create_enum_history (sym, last_initializer);
7378 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7381 /* Free stuff up and return. */
7382 gfc_free_expr (initializer);
7388 /* Match the enumerator definition statement. */
7391 gfc_match_enumerator_def (void)
7396 gfc_clear_ts (¤t_ts);
7398 m = gfc_match (" enumerator");
7402 m = gfc_match (" :: ");
7403 if (m == MATCH_ERROR)
7406 colon_seen = (m == MATCH_YES);
7408 if (gfc_current_state () != COMP_ENUM)
7410 gfc_error ("ENUM definition statement expected before %C");
7411 gfc_free_enum_history ();
7415 (¤t_ts)->type = BT_INTEGER;
7416 (¤t_ts)->kind = gfc_c_int_kind;
7418 gfc_clear_attr (¤t_attr);
7419 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7428 m = enumerator_decl ();
7429 if (m == MATCH_ERROR)
7431 gfc_free_enum_history ();
7437 if (gfc_match_eos () == MATCH_YES)
7439 if (gfc_match_char (',') != MATCH_YES)
7443 if (gfc_current_state () == COMP_ENUM)
7445 gfc_free_enum_history ();
7446 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7451 gfc_free_array_spec (current_as);
7458 /* Match binding attributes. */
7461 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7463 bool found_passing = false;
7464 bool seen_ptr = false;
7465 match m = MATCH_YES;
7467 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7468 this case the defaults are in there. */
7469 ba->access = ACCESS_UNKNOWN;
7470 ba->pass_arg = NULL;
7471 ba->pass_arg_num = 0;
7473 ba->non_overridable = 0;
7477 /* If we find a comma, we believe there are binding attributes. */
7478 m = gfc_match_char (',');
7484 /* Access specifier. */
7486 m = gfc_match (" public");
7487 if (m == MATCH_ERROR)
7491 if (ba->access != ACCESS_UNKNOWN)
7493 gfc_error ("Duplicate access-specifier at %C");
7497 ba->access = ACCESS_PUBLIC;
7501 m = gfc_match (" private");
7502 if (m == MATCH_ERROR)
7506 if (ba->access != ACCESS_UNKNOWN)
7508 gfc_error ("Duplicate access-specifier at %C");
7512 ba->access = ACCESS_PRIVATE;
7516 /* If inside GENERIC, the following is not allowed. */
7521 m = gfc_match (" nopass");
7522 if (m == MATCH_ERROR)
7528 gfc_error ("Binding attributes already specify passing,"
7529 " illegal NOPASS at %C");
7533 found_passing = true;
7538 /* PASS possibly including argument. */
7539 m = gfc_match (" pass");
7540 if (m == MATCH_ERROR)
7544 char arg[GFC_MAX_SYMBOL_LEN + 1];
7548 gfc_error ("Binding attributes already specify passing,"
7549 " illegal PASS at %C");
7553 m = gfc_match (" ( %n )", arg);
7554 if (m == MATCH_ERROR)
7557 ba->pass_arg = gfc_get_string (arg);
7558 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7560 found_passing = true;
7568 m = gfc_match (" pointer");
7569 if (m == MATCH_ERROR)
7575 gfc_error ("Duplicate POINTER attribute at %C");
7585 /* NON_OVERRIDABLE flag. */
7586 m = gfc_match (" non_overridable");
7587 if (m == MATCH_ERROR)
7591 if (ba->non_overridable)
7593 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7597 ba->non_overridable = 1;
7601 /* DEFERRED flag. */
7602 m = gfc_match (" deferred");
7603 if (m == MATCH_ERROR)
7609 gfc_error ("Duplicate DEFERRED at %C");
7620 /* Nothing matching found. */
7622 gfc_error ("Expected access-specifier at %C");
7624 gfc_error ("Expected binding attribute at %C");
7627 while (gfc_match_char (',') == MATCH_YES);
7629 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7630 if (ba->non_overridable && ba->deferred)
7632 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7639 if (ba->access == ACCESS_UNKNOWN)
7640 ba->access = gfc_typebound_default_access;
7642 if (ppc && !seen_ptr)
7644 gfc_error ("POINTER attribute is required for procedure pointer component"
7656 /* Match a PROCEDURE specific binding inside a derived type. */
7659 match_procedure_in_type (void)
7661 char name[GFC_MAX_SYMBOL_LEN + 1];
7662 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7663 char* target = NULL, *ifc = NULL;
7664 gfc_typebound_proc tb;
7673 /* Check current state. */
7674 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7675 block = gfc_state_stack->previous->sym;
7678 /* Try to match PROCEDURE(interface). */
7679 if (gfc_match (" (") == MATCH_YES)
7681 m = gfc_match_name (target_buf);
7682 if (m == MATCH_ERROR)
7686 gfc_error ("Interface-name expected after '(' at %C");
7690 if (gfc_match (" )") != MATCH_YES)
7692 gfc_error ("')' expected at %C");
7699 /* Construct the data structure. */
7700 memset (&tb, 0, sizeof (tb));
7701 tb.where = gfc_current_locus;
7703 /* Match binding attributes. */
7704 m = match_binding_attributes (&tb, false, false);
7705 if (m == MATCH_ERROR)
7707 seen_attrs = (m == MATCH_YES);
7709 /* Check that attribute DEFERRED is given if an interface is specified. */
7710 if (tb.deferred && !ifc)
7712 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7715 if (ifc && !tb.deferred)
7717 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7721 /* Match the colons. */
7722 m = gfc_match (" ::");
7723 if (m == MATCH_ERROR)
7725 seen_colons = (m == MATCH_YES);
7726 if (seen_attrs && !seen_colons)
7728 gfc_error ("Expected '::' after binding-attributes at %C");
7732 /* Match the binding names. */
7735 m = gfc_match_name (name);
7736 if (m == MATCH_ERROR)
7740 gfc_error ("Expected binding name at %C");
7744 if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list"
7745 " at %C") == FAILURE)
7748 /* Try to match the '=> target', if it's there. */
7750 m = gfc_match (" =>");
7751 if (m == MATCH_ERROR)
7757 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7763 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7768 m = gfc_match_name (target_buf);
7769 if (m == MATCH_ERROR)
7773 gfc_error ("Expected binding target after '=>' at %C");
7776 target = target_buf;
7779 /* If no target was found, it has the same name as the binding. */
7783 /* Get the namespace to insert the symbols into. */
7784 ns = block->f2k_derived;
7787 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7788 if (tb.deferred && !block->attr.abstract)
7790 gfc_error ("Type '%s' containing DEFERRED binding at %C "
7791 "is not ABSTRACT", block->name);
7795 /* See if we already have a binding with this name in the symtree which
7796 would be an error. If a GENERIC already targetted this binding, it may
7797 be already there but then typebound is still NULL. */
7798 stree = gfc_find_symtree (ns->tb_sym_root, name);
7799 if (stree && stree->n.tb)
7801 gfc_error ("There is already a procedure with binding name '%s' for "
7802 "the derived type '%s' at %C", name, block->name);
7806 /* Insert it and set attributes. */
7810 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7813 stree->n.tb = gfc_get_typebound_proc (&tb);
7815 if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific,
7818 gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym);
7820 if (gfc_match_eos () == MATCH_YES)
7822 if (gfc_match_char (',') != MATCH_YES)
7827 gfc_error ("Syntax error in PROCEDURE statement at %C");
7832 /* Match a GENERIC procedure binding inside a derived type. */
7835 gfc_match_generic (void)
7837 char name[GFC_MAX_SYMBOL_LEN + 1];
7838 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7840 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7841 gfc_typebound_proc* tb;
7843 interface_type op_type;
7844 gfc_intrinsic_op op;
7847 /* Check current state. */
7848 if (gfc_current_state () == COMP_DERIVED)
7850 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7853 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7855 block = gfc_state_stack->previous->sym;
7856 ns = block->f2k_derived;
7857 gcc_assert (block && ns);
7859 memset (&tbattr, 0, sizeof (tbattr));
7860 tbattr.where = gfc_current_locus;
7862 /* See if we get an access-specifier. */
7863 m = match_binding_attributes (&tbattr, true, false);
7864 if (m == MATCH_ERROR)
7867 /* Now the colons, those are required. */
7868 if (gfc_match (" ::") != MATCH_YES)
7870 gfc_error ("Expected '::' at %C");
7874 /* Match the binding name; depending on type (operator / generic) format
7875 it for future error messages into bind_name. */
7877 m = gfc_match_generic_spec (&op_type, name, &op);
7878 if (m == MATCH_ERROR)
7882 gfc_error ("Expected generic name or operator descriptor at %C");
7888 case INTERFACE_GENERIC:
7889 snprintf (bind_name, sizeof (bind_name), "%s", name);
7892 case INTERFACE_USER_OP:
7893 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7896 case INTERFACE_INTRINSIC_OP:
7897 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7898 gfc_op2string (op));
7905 /* Match the required =>. */
7906 if (gfc_match (" =>") != MATCH_YES)
7908 gfc_error ("Expected '=>' at %C");
7912 /* Try to find existing GENERIC binding with this name / for this operator;
7913 if there is something, check that it is another GENERIC and then extend
7914 it rather than building a new node. Otherwise, create it and put it
7915 at the right position. */
7919 case INTERFACE_USER_OP:
7920 case INTERFACE_GENERIC:
7922 const bool is_op = (op_type == INTERFACE_USER_OP);
7925 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7937 case INTERFACE_INTRINSIC_OP:
7947 if (!tb->is_generic)
7949 gcc_assert (op_type == INTERFACE_GENERIC);
7950 gfc_error ("There's already a non-generic procedure with binding name"
7951 " '%s' for the derived type '%s' at %C",
7952 bind_name, block->name);
7956 if (tb->access != tbattr.access)
7958 gfc_error ("Binding at %C must have the same access as already"
7959 " defined binding '%s'", bind_name);
7965 tb = gfc_get_typebound_proc (NULL);
7966 tb->where = gfc_current_locus;
7967 tb->access = tbattr.access;
7969 tb->u.generic = NULL;
7973 case INTERFACE_GENERIC:
7974 case INTERFACE_USER_OP:
7976 const bool is_op = (op_type == INTERFACE_USER_OP);
7979 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7987 case INTERFACE_INTRINSIC_OP:
7996 /* Now, match all following names as specific targets. */
7999 gfc_symtree* target_st;
8000 gfc_tbp_generic* target;
8002 m = gfc_match_name (name);
8003 if (m == MATCH_ERROR)
8007 gfc_error ("Expected specific binding name at %C");
8011 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
8013 /* See if this is a duplicate specification. */
8014 for (target = tb->u.generic; target; target = target->next)
8015 if (target_st == target->specific_st)
8017 gfc_error ("'%s' already defined as specific binding for the"
8018 " generic '%s' at %C", name, bind_name);
8022 target = gfc_get_tbp_generic ();
8023 target->specific_st = target_st;
8024 target->specific = NULL;
8025 target->next = tb->u.generic;
8026 tb->u.generic = target;
8028 while (gfc_match (" ,") == MATCH_YES);
8030 /* Here should be the end. */
8031 if (gfc_match_eos () != MATCH_YES)
8033 gfc_error ("Junk after GENERIC binding at %C");
8044 /* Match a FINAL declaration inside a derived type. */
8047 gfc_match_final_decl (void)
8049 char name[GFC_MAX_SYMBOL_LEN + 1];
8052 gfc_namespace* module_ns;
8056 if (gfc_current_form == FORM_FREE)
8058 char c = gfc_peek_ascii_char ();
8059 if (!gfc_is_whitespace (c) && c != ':')
8063 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
8065 if (gfc_current_form == FORM_FIXED)
8068 gfc_error ("FINAL declaration at %C must be inside a derived type "
8069 "CONTAINS section");
8073 block = gfc_state_stack->previous->sym;
8076 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
8077 || gfc_state_stack->previous->previous->state != COMP_MODULE)
8079 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8080 " specification part of a MODULE");
8084 module_ns = gfc_current_ns;
8085 gcc_assert (module_ns);
8086 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
8088 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8089 if (gfc_match (" ::") == MATCH_ERROR)
8092 /* Match the sequence of procedure names. */
8099 if (first && gfc_match_eos () == MATCH_YES)
8101 gfc_error ("Empty FINAL at %C");
8105 m = gfc_match_name (name);
8108 gfc_error ("Expected module procedure name at %C");
8111 else if (m != MATCH_YES)
8114 if (gfc_match_eos () == MATCH_YES)
8116 if (!last && gfc_match_char (',') != MATCH_YES)
8118 gfc_error ("Expected ',' at %C");
8122 if (gfc_get_symbol (name, module_ns, &sym))
8124 gfc_error ("Unknown procedure name \"%s\" at %C", name);
8128 /* Mark the symbol as module procedure. */
8129 if (sym->attr.proc != PROC_MODULE
8130 && gfc_add_procedure (&sym->attr, PROC_MODULE,
8131 sym->name, NULL) == FAILURE)
8134 /* Check if we already have this symbol in the list, this is an error. */
8135 for (f = block->f2k_derived->finalizers; f; f = f->next)
8136 if (f->proc_sym == sym)
8138 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8143 /* Add this symbol to the list of finalizers. */
8144 gcc_assert (block->f2k_derived);
8146 f = XCNEW (gfc_finalizer);
8148 f->proc_tree = NULL;
8149 f->where = gfc_current_locus;
8150 f->next = block->f2k_derived->finalizers;
8151 block->f2k_derived->finalizers = f;
8161 const ext_attr_t ext_attr_list[] = {
8162 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
8163 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
8164 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
8165 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
8166 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
8167 { NULL, EXT_ATTR_LAST, NULL }
8170 /* Match a !GCC$ ATTRIBUTES statement of the form:
8171 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8172 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8174 TODO: We should support all GCC attributes using the same syntax for
8175 the attribute list, i.e. the list in C
8176 __attributes(( attribute-list ))
8178 !GCC$ ATTRIBUTES attribute-list ::
8179 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8182 As there is absolutely no risk of confusion, we should never return
8185 gfc_match_gcc_attributes (void)
8187 symbol_attribute attr;
8188 char name[GFC_MAX_SYMBOL_LEN + 1];
8193 gfc_clear_attr (&attr);
8198 if (gfc_match_name (name) != MATCH_YES)
8201 for (id = 0; id < EXT_ATTR_LAST; id++)
8202 if (strcmp (name, ext_attr_list[id].name) == 0)
8205 if (id == EXT_ATTR_LAST)
8207 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8211 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
8215 gfc_gobble_whitespace ();
8216 ch = gfc_next_ascii_char ();
8219 /* This is the successful exit condition for the loop. */
8220 if (gfc_next_ascii_char () == ':')
8230 if (gfc_match_eos () == MATCH_YES)
8235 m = gfc_match_name (name);
8239 if (find_special (name, &sym, true))
8242 sym->attr.ext_attr |= attr.ext_attr;
8244 if (gfc_match_eos () == MATCH_YES)
8247 if (gfc_match_char (',') != MATCH_YES)
8254 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");