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)
1160 sym->attr.class_ok = (sym->attr.dummy
1161 || sym->attr.pointer
1162 || sym->attr.allocatable) ? 1 : 0;
1163 gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false);
1170 /* Set character constant to the given length. The constant will be padded or
1171 truncated. If we're inside an array constructor without a typespec, we
1172 additionally check that all elements have the same length; check_len -1
1173 means no checking. */
1176 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1181 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1182 gcc_assert (expr->ts.type == BT_CHARACTER);
1184 slen = expr->value.character.length;
1187 s = gfc_get_wide_string (len + 1);
1188 memcpy (s, expr->value.character.string,
1189 MIN (len, slen) * sizeof (gfc_char_t));
1191 gfc_wide_memset (&s[slen], ' ', len - slen);
1193 if (gfc_option.warn_character_truncation && slen > len)
1194 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1195 "(%d/%d)", &expr->where, slen, len);
1197 /* Apply the standard by 'hand' otherwise it gets cleared for
1199 if (check_len != -1 && slen != check_len
1200 && !(gfc_option.allow_std & GFC_STD_GNU))
1201 gfc_error_now ("The CHARACTER elements of the array constructor "
1202 "at %L must have the same length (%d/%d)",
1203 &expr->where, slen, check_len);
1206 gfc_free (expr->value.character.string);
1207 expr->value.character.string = s;
1208 expr->value.character.length = len;
1213 /* Function to create and update the enumerator history
1214 using the information passed as arguments.
1215 Pointer "max_enum" is also updated, to point to
1216 enum history node containing largest initializer.
1218 SYM points to the symbol node of enumerator.
1219 INIT points to its enumerator value. */
1222 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1224 enumerator_history *new_enum_history;
1225 gcc_assert (sym != NULL && init != NULL);
1227 new_enum_history = XCNEW (enumerator_history);
1229 new_enum_history->sym = sym;
1230 new_enum_history->initializer = init;
1231 new_enum_history->next = NULL;
1233 if (enum_history == NULL)
1235 enum_history = new_enum_history;
1236 max_enum = enum_history;
1240 new_enum_history->next = enum_history;
1241 enum_history = new_enum_history;
1243 if (mpz_cmp (max_enum->initializer->value.integer,
1244 new_enum_history->initializer->value.integer) < 0)
1245 max_enum = new_enum_history;
1250 /* Function to free enum kind history. */
1253 gfc_free_enum_history (void)
1255 enumerator_history *current = enum_history;
1256 enumerator_history *next;
1258 while (current != NULL)
1260 next = current->next;
1265 enum_history = NULL;
1269 /* Function called by variable_decl() that adds an initialization
1270 expression to a symbol. */
1273 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1275 symbol_attribute attr;
1280 if (find_special (name, &sym, false))
1285 /* If this symbol is confirming an implicit parameter type,
1286 then an initialization expression is not allowed. */
1287 if (attr.flavor == FL_PARAMETER
1288 && sym->value != NULL
1291 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1298 /* An initializer is required for PARAMETER declarations. */
1299 if (attr.flavor == FL_PARAMETER)
1301 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1307 /* If a variable appears in a DATA block, it cannot have an
1311 gfc_error ("Variable '%s' at %C with an initializer already "
1312 "appears in a DATA statement", sym->name);
1316 /* Check if the assignment can happen. This has to be put off
1317 until later for a derived type variable. */
1318 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1319 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1320 && gfc_check_assign_symbol (sym, init) == FAILURE)
1323 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1324 && init->ts.type == BT_CHARACTER)
1326 /* Update symbol character length according initializer. */
1327 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1330 if (sym->ts.u.cl->length == NULL)
1333 /* If there are multiple CHARACTER variables declared on the
1334 same line, we don't want them to share the same length. */
1335 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1337 if (sym->attr.flavor == FL_PARAMETER)
1339 if (init->expr_type == EXPR_CONSTANT)
1341 clen = init->value.character.length;
1342 sym->ts.u.cl->length
1343 = gfc_get_int_expr (gfc_default_integer_kind,
1346 else if (init->expr_type == EXPR_ARRAY)
1349 c = gfc_constructor_first (init->value.constructor);
1350 clen = c->expr->value.character.length;
1351 sym->ts.u.cl->length
1352 = gfc_get_int_expr (gfc_default_integer_kind,
1355 else if (init->ts.u.cl && init->ts.u.cl->length)
1356 sym->ts.u.cl->length =
1357 gfc_copy_expr (sym->value->ts.u.cl->length);
1360 /* Update initializer character length according symbol. */
1361 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1363 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1365 if (init->expr_type == EXPR_CONSTANT)
1366 gfc_set_constant_character_len (len, init, -1);
1367 else if (init->expr_type == EXPR_ARRAY)
1371 /* Build a new charlen to prevent simplification from
1372 deleting the length before it is resolved. */
1373 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1374 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1376 for (c = gfc_constructor_first (init->value.constructor);
1377 c; c = gfc_constructor_next (c))
1378 gfc_set_constant_character_len (len, c->expr, -1);
1383 /* Need to check if the expression we initialized this
1384 to was one of the iso_c_binding named constants. If so,
1385 and we're a parameter (constant), let it be iso_c.
1387 integer(c_int), parameter :: my_int = c_int
1388 integer(my_int) :: my_int_2
1389 If we mark my_int as iso_c (since we can see it's value
1390 is equal to one of the named constants), then my_int_2
1391 will be considered C interoperable. */
1392 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1394 sym->ts.is_iso_c |= init->ts.is_iso_c;
1395 sym->ts.is_c_interop |= init->ts.is_c_interop;
1396 /* attr bits needed for module files. */
1397 sym->attr.is_iso_c |= init->ts.is_iso_c;
1398 sym->attr.is_c_interop |= init->ts.is_c_interop;
1399 if (init->ts.is_iso_c)
1400 sym->ts.f90_type = init->ts.f90_type;
1403 /* Add initializer. Make sure we keep the ranks sane. */
1404 if (sym->attr.dimension && init->rank == 0)
1409 if (sym->attr.flavor == FL_PARAMETER
1410 && init->expr_type == EXPR_CONSTANT
1411 && spec_size (sym->as, &size) == SUCCESS
1412 && mpz_cmp_si (size, 0) > 0)
1414 array = gfc_get_array_expr (init->ts.type, init->ts.kind,
1416 for (n = 0; n < (int)mpz_get_si (size); n++)
1417 gfc_constructor_append_expr (&array->value.constructor,
1420 : gfc_copy_expr (init),
1423 array->shape = gfc_get_shape (sym->as->rank);
1424 for (n = 0; n < sym->as->rank; n++)
1425 spec_dimen_size (sym->as, n, &array->shape[n]);
1430 init->rank = sym->as->rank;
1434 if (sym->attr.save == SAVE_NONE)
1435 sym->attr.save = SAVE_IMPLICIT;
1443 /* Function called by variable_decl() that adds a name to a structure
1447 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1448 gfc_array_spec **as)
1451 gfc_try t = SUCCESS;
1453 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1454 constructing, it must have the pointer attribute. */
1455 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1456 && current_ts.u.derived == gfc_current_block ()
1457 && current_attr.pointer == 0)
1459 gfc_error ("Component at %C must have the POINTER attribute");
1463 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1465 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1467 gfc_error ("Array component of structure at %C must have explicit "
1468 "or deferred shape");
1473 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1477 if (c->ts.type == BT_CHARACTER)
1479 c->attr = current_attr;
1481 c->initializer = *init;
1488 c->attr.codimension = 1;
1490 c->attr.dimension = 1;
1494 /* Should this ever get more complicated, combine with similar section
1495 in add_init_expr_to_sym into a separate function. */
1496 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1497 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1501 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1502 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1503 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1505 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1507 if (c->initializer->expr_type == EXPR_CONSTANT)
1508 gfc_set_constant_character_len (len, c->initializer, -1);
1509 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1510 c->initializer->ts.u.cl->length->value.integer))
1512 gfc_constructor *ctor;
1513 ctor = gfc_constructor_first (c->initializer->value.constructor);
1518 bool has_ts = (c->initializer->ts.u.cl
1519 && c->initializer->ts.u.cl->length_from_typespec);
1521 /* Remember the length of the first element for checking
1522 that all elements *in the constructor* have the same
1523 length. This need not be the length of the LHS! */
1524 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1525 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1526 first_len = ctor->expr->value.character.length;
1528 for ( ; ctor; ctor = gfc_constructor_next (ctor))
1529 if (ctor->expr->expr_type == EXPR_CONSTANT)
1531 gfc_set_constant_character_len (len, ctor->expr,
1532 has_ts ? -1 : first_len);
1533 ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length);
1539 /* Check array components. */
1540 if (!c->attr.dimension)
1543 if (c->attr.pointer)
1545 if (c->as->type != AS_DEFERRED)
1547 gfc_error ("Pointer array component of structure at %C must have a "
1552 else if (c->attr.allocatable)
1554 if (c->as->type != AS_DEFERRED)
1556 gfc_error ("Allocatable component of structure at %C must have a "
1563 if (c->as->type != AS_EXPLICIT)
1565 gfc_error ("Array component of structure at %C must have an "
1572 if (c->ts.type == BT_CLASS)
1573 gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true);
1579 /* Match a 'NULL()', and possibly take care of some side effects. */
1582 gfc_match_null (gfc_expr **result)
1587 m = gfc_match (" null ( )");
1591 /* The NULL symbol now has to be/become an intrinsic function. */
1592 if (gfc_get_symbol ("null", NULL, &sym))
1594 gfc_error ("NULL() initialization at %C is ambiguous");
1598 gfc_intrinsic_symbol (sym);
1600 if (sym->attr.proc != PROC_INTRINSIC
1601 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1602 sym->name, NULL) == FAILURE
1603 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1606 *result = gfc_get_null_expr (&gfc_current_locus);
1612 /* Match a variable name with an optional initializer. When this
1613 subroutine is called, a variable is expected to be parsed next.
1614 Depending on what is happening at the moment, updates either the
1615 symbol table or the current interface. */
1618 variable_decl (int elem)
1620 char name[GFC_MAX_SYMBOL_LEN + 1];
1621 gfc_expr *initializer, *char_len;
1623 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1634 /* When we get here, we've just matched a list of attributes and
1635 maybe a type and a double colon. The next thing we expect to see
1636 is the name of the symbol. */
1637 m = gfc_match_name (name);
1641 var_locus = gfc_current_locus;
1643 /* Now we could see the optional array spec. or character length. */
1644 m = gfc_match_array_spec (&as, true, true);
1645 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1646 cp_as = gfc_copy_array_spec (as);
1647 else if (m == MATCH_ERROR)
1651 as = gfc_copy_array_spec (current_as);
1652 else if (current_as)
1653 merge_array_spec (current_as, as, true);
1658 if (current_ts.type == BT_CHARACTER)
1660 switch (match_char_length (&char_len))
1663 cl = gfc_new_charlen (gfc_current_ns, NULL);
1665 cl->length = char_len;
1668 /* Non-constant lengths need to be copied after the first
1669 element. Also copy assumed lengths. */
1672 && (current_ts.u.cl->length == NULL
1673 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1675 cl = gfc_new_charlen (gfc_current_ns, NULL);
1676 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1679 cl = current_ts.u.cl;
1688 /* If this symbol has already shown up in a Cray Pointer declaration,
1689 then we want to set the type & bail out. */
1690 if (gfc_option.flag_cray_pointer)
1692 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1693 if (sym != NULL && sym->attr.cray_pointee)
1695 sym->ts.type = current_ts.type;
1696 sym->ts.kind = current_ts.kind;
1698 sym->ts.u.derived = current_ts.u.derived;
1699 sym->ts.is_c_interop = current_ts.is_c_interop;
1700 sym->ts.is_iso_c = current_ts.is_iso_c;
1703 /* Check to see if we have an array specification. */
1706 if (sym->as != NULL)
1708 gfc_error ("Duplicate array spec for Cray pointee at %C");
1709 gfc_free_array_spec (cp_as);
1715 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1716 gfc_internal_error ("Couldn't set pointee array spec.");
1718 /* Fix the array spec. */
1719 m = gfc_mod_pointee_as (sym->as);
1720 if (m == MATCH_ERROR)
1728 gfc_free_array_spec (cp_as);
1732 /* Procedure pointer as function result. */
1733 if (gfc_current_state () == COMP_FUNCTION
1734 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1735 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1736 strcpy (name, "ppr@");
1738 if (gfc_current_state () == COMP_FUNCTION
1739 && strcmp (name, gfc_current_block ()->name) == 0
1740 && gfc_current_block ()->result
1741 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1742 strcpy (name, "ppr@");
1744 /* OK, we've successfully matched the declaration. Now put the
1745 symbol in the current namespace, because it might be used in the
1746 optional initialization expression for this symbol, e.g. this is
1749 integer, parameter :: i = huge(i)
1751 This is only true for parameters or variables of a basic type.
1752 For components of derived types, it is not true, so we don't
1753 create a symbol for those yet. If we fail to create the symbol,
1755 if (gfc_current_state () != COMP_DERIVED
1756 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1762 /* An interface body specifies all of the procedure's
1763 characteristics and these shall be consistent with those
1764 specified in the procedure definition, except that the interface
1765 may specify a procedure that is not pure if the procedure is
1766 defined to be pure(12.3.2). */
1767 if (current_ts.type == BT_DERIVED
1768 && gfc_current_ns->proc_name
1769 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1770 && current_ts.u.derived->ns != gfc_current_ns)
1773 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1774 if (!(current_ts.u.derived->attr.imported
1776 && st->n.sym == current_ts.u.derived)
1777 && !gfc_current_ns->has_import_set)
1779 gfc_error ("the type of '%s' at %C has not been declared within the "
1786 /* In functions that have a RESULT variable defined, the function
1787 name always refers to function calls. Therefore, the name is
1788 not allowed to appear in specification statements. */
1789 if (gfc_current_state () == COMP_FUNCTION
1790 && gfc_current_block () != NULL
1791 && gfc_current_block ()->result != NULL
1792 && gfc_current_block ()->result != gfc_current_block ()
1793 && strcmp (gfc_current_block ()->name, name) == 0)
1795 gfc_error ("Function name '%s' not allowed at %C", name);
1800 /* We allow old-style initializations of the form
1801 integer i /2/, j(4) /3*3, 1/
1802 (if no colon has been seen). These are different from data
1803 statements in that initializers are only allowed to apply to the
1804 variable immediately preceding, i.e.
1806 is not allowed. Therefore we have to do some work manually, that
1807 could otherwise be left to the matchers for DATA statements. */
1809 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1811 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1812 "initialization at %C") == FAILURE)
1815 return match_old_style_init (name);
1818 /* The double colon must be present in order to have initializers.
1819 Otherwise the statement is ambiguous with an assignment statement. */
1822 if (gfc_match (" =>") == MATCH_YES)
1824 if (!current_attr.pointer)
1826 gfc_error ("Initialization at %C isn't for a pointer variable");
1831 m = gfc_match_null (&initializer);
1834 gfc_error ("Pointer initialization requires a NULL() at %C");
1838 if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED)
1840 gfc_error ("Initialization of pointer at %C is not allowed in "
1841 "a PURE procedure");
1849 else if (gfc_match_char ('=') == MATCH_YES)
1851 if (current_attr.pointer)
1853 gfc_error ("Pointer initialization at %C requires '=>', "
1859 m = gfc_match_init_expr (&initializer);
1862 gfc_error ("Expected an initialization expression at %C");
1866 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)
1867 && gfc_state_stack->state != COMP_DERIVED)
1869 gfc_error ("Initialization of variable at %C is not allowed in "
1870 "a PURE procedure");
1879 if (initializer != NULL && current_attr.allocatable
1880 && gfc_current_state () == COMP_DERIVED)
1882 gfc_error ("Initialization of allocatable component at %C is not "
1888 /* Add the initializer. Note that it is fine if initializer is
1889 NULL here, because we sometimes also need to check if a
1890 declaration *must* have an initialization expression. */
1891 if (gfc_current_state () != COMP_DERIVED)
1892 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1895 if (current_ts.type == BT_DERIVED
1896 && !current_attr.pointer && !initializer)
1897 initializer = gfc_default_initializer (¤t_ts);
1898 t = build_struct (name, cl, &initializer, &as);
1901 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1904 /* Free stuff up and return. */
1905 gfc_free_expr (initializer);
1906 gfc_free_array_spec (as);
1912 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1913 This assumes that the byte size is equal to the kind number for
1914 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1917 gfc_match_old_kind_spec (gfc_typespec *ts)
1922 if (gfc_match_char ('*') != MATCH_YES)
1925 m = gfc_match_small_literal_int (&ts->kind, NULL);
1929 original_kind = ts->kind;
1931 /* Massage the kind numbers for complex types. */
1932 if (ts->type == BT_COMPLEX)
1936 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1937 gfc_basic_typename (ts->type), original_kind);
1943 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1945 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1946 gfc_basic_typename (ts->type), original_kind);
1950 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1951 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1958 /* Match a kind specification. Since kinds are generally optional, we
1959 usually return MATCH_NO if something goes wrong. If a "kind="
1960 string is found, then we know we have an error. */
1963 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1975 where = loc = gfc_current_locus;
1980 if (gfc_match_char ('(') == MATCH_NO)
1983 /* Also gobbles optional text. */
1984 if (gfc_match (" kind = ") == MATCH_YES)
1987 loc = gfc_current_locus;
1990 n = gfc_match_init_expr (&e);
1994 if (gfc_matching_function)
1996 /* The function kind expression might include use associated or
1997 imported parameters and try again after the specification
1999 if (gfc_match_char (')') != MATCH_YES)
2001 gfc_error ("Missing right parenthesis at %C");
2007 gfc_undo_symbols ();
2012 /* ....or else, the match is real. */
2014 gfc_error ("Expected initialization expression at %C");
2022 gfc_error ("Expected scalar initialization expression at %C");
2027 msg = gfc_extract_int (e, &ts->kind);
2036 /* Before throwing away the expression, let's see if we had a
2037 C interoperable kind (and store the fact). */
2038 if (e->ts.is_c_interop == 1)
2040 /* Mark this as c interoperable if being declared with one
2041 of the named constants from iso_c_binding. */
2042 ts->is_c_interop = e->ts.is_iso_c;
2043 ts->f90_type = e->ts.f90_type;
2049 /* Ignore errors to this point, if we've gotten here. This means
2050 we ignore the m=MATCH_ERROR from above. */
2051 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
2053 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2054 gfc_basic_typename (ts->type));
2055 gfc_current_locus = where;
2059 /* Warn if, e.g., c_int is used for a REAL variable, but not
2060 if, e.g., c_double is used for COMPLEX as the standard
2061 explicitly says that the kind type parameter for complex and real
2062 variable is the same, i.e. c_float == c_float_complex. */
2063 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2064 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2065 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2066 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2067 "is %s", gfc_basic_typename (ts->f90_type), &where,
2068 gfc_basic_typename (ts->type));
2070 gfc_gobble_whitespace ();
2071 if ((c = gfc_next_ascii_char ()) != ')'
2072 && (ts->type != BT_CHARACTER || c != ','))
2074 if (ts->type == BT_CHARACTER)
2075 gfc_error ("Missing right parenthesis or comma at %C");
2077 gfc_error ("Missing right parenthesis at %C");
2081 /* All tests passed. */
2084 if(m == MATCH_ERROR)
2085 gfc_current_locus = where;
2087 /* Return what we know from the test(s). */
2092 gfc_current_locus = where;
2098 match_char_kind (int * kind, int * is_iso_c)
2107 where = gfc_current_locus;
2109 n = gfc_match_init_expr (&e);
2111 if (n != MATCH_YES && gfc_matching_function)
2113 /* The expression might include use-associated or imported
2114 parameters and try again after the specification
2117 gfc_undo_symbols ();
2122 gfc_error ("Expected initialization expression at %C");
2128 gfc_error ("Expected scalar initialization expression at %C");
2133 msg = gfc_extract_int (e, kind);
2134 *is_iso_c = e->ts.is_iso_c;
2144 /* Ignore errors to this point, if we've gotten here. This means
2145 we ignore the m=MATCH_ERROR from above. */
2146 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2148 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2152 /* All tests passed. */
2155 if (m == MATCH_ERROR)
2156 gfc_current_locus = where;
2158 /* Return what we know from the test(s). */
2163 gfc_current_locus = where;
2168 /* Match the various kind/length specifications in a CHARACTER
2169 declaration. We don't return MATCH_NO. */
2172 gfc_match_char_spec (gfc_typespec *ts)
2174 int kind, seen_length, is_iso_c;
2184 /* Try the old-style specification first. */
2185 old_char_selector = 0;
2187 m = match_char_length (&len);
2191 old_char_selector = 1;
2196 m = gfc_match_char ('(');
2199 m = MATCH_YES; /* Character without length is a single char. */
2203 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2204 if (gfc_match (" kind =") == MATCH_YES)
2206 m = match_char_kind (&kind, &is_iso_c);
2208 if (m == MATCH_ERROR)
2213 if (gfc_match (" , len =") == MATCH_NO)
2216 m = char_len_param_value (&len);
2219 if (m == MATCH_ERROR)
2226 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2227 if (gfc_match (" len =") == MATCH_YES)
2229 m = char_len_param_value (&len);
2232 if (m == MATCH_ERROR)
2236 if (gfc_match_char (')') == MATCH_YES)
2239 if (gfc_match (" , kind =") != MATCH_YES)
2242 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2248 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2249 m = char_len_param_value (&len);
2252 if (m == MATCH_ERROR)
2256 m = gfc_match_char (')');
2260 if (gfc_match_char (',') != MATCH_YES)
2263 gfc_match (" kind ="); /* Gobble optional text. */
2265 m = match_char_kind (&kind, &is_iso_c);
2266 if (m == MATCH_ERROR)
2272 /* Require a right-paren at this point. */
2273 m = gfc_match_char (')');
2278 gfc_error ("Syntax error in CHARACTER declaration at %C");
2280 gfc_free_expr (len);
2284 /* Deal with character functions after USE and IMPORT statements. */
2285 if (gfc_matching_function)
2287 gfc_free_expr (len);
2288 gfc_undo_symbols ();
2294 gfc_free_expr (len);
2298 /* Do some final massaging of the length values. */
2299 cl = gfc_new_charlen (gfc_current_ns, NULL);
2301 if (seen_length == 0)
2302 cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
2307 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2309 /* We have to know if it was a c interoperable kind so we can
2310 do accurate type checking of bind(c) procs, etc. */
2312 /* Mark this as c interoperable if being declared with one
2313 of the named constants from iso_c_binding. */
2314 ts->is_c_interop = is_iso_c;
2315 else if (len != NULL)
2316 /* Here, we might have parsed something such as: character(c_char)
2317 In this case, the parsing code above grabs the c_char when
2318 looking for the length (line 1690, roughly). it's the last
2319 testcase for parsing the kind params of a character variable.
2320 However, it's not actually the length. this seems like it
2322 To see if the user used a C interop kind, test the expr
2323 of the so called length, and see if it's C interoperable. */
2324 ts->is_c_interop = len->ts.is_iso_c;
2330 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2331 structure to the matched specification. This is necessary for FUNCTION and
2332 IMPLICIT statements.
2334 If implicit_flag is nonzero, then we don't check for the optional
2335 kind specification. Not doing so is needed for matching an IMPLICIT
2336 statement correctly. */
2339 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2341 char name[GFC_MAX_SYMBOL_LEN + 1];
2345 bool seen_deferred_kind;
2347 /* A belt and braces check that the typespec is correctly being treated
2348 as a deferred characteristic association. */
2349 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2350 && (gfc_current_block ()->result->ts.kind == -1)
2351 && (ts->kind == -1);
2353 if (seen_deferred_kind)
2356 /* Clear the current binding label, in case one is given. */
2357 curr_binding_label[0] = '\0';
2359 if (gfc_match (" byte") == MATCH_YES)
2361 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2365 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2367 gfc_error ("BYTE type used at %C "
2368 "is not available on the target machine");
2372 ts->type = BT_INTEGER;
2377 if (gfc_match (" integer") == MATCH_YES)
2379 ts->type = BT_INTEGER;
2380 ts->kind = gfc_default_integer_kind;
2384 if (gfc_match (" character") == MATCH_YES)
2386 ts->type = BT_CHARACTER;
2387 if (implicit_flag == 0)
2388 return gfc_match_char_spec (ts);
2393 if (gfc_match (" real") == MATCH_YES)
2396 ts->kind = gfc_default_real_kind;
2400 if (gfc_match (" double precision") == MATCH_YES)
2403 ts->kind = gfc_default_double_kind;
2407 if (gfc_match (" complex") == MATCH_YES)
2409 ts->type = BT_COMPLEX;
2410 ts->kind = gfc_default_complex_kind;
2414 if (gfc_match (" double complex") == MATCH_YES)
2416 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2417 "conform to the Fortran 95 standard") == FAILURE)
2420 ts->type = BT_COMPLEX;
2421 ts->kind = gfc_default_double_kind;
2425 if (gfc_match (" logical") == MATCH_YES)
2427 ts->type = BT_LOGICAL;
2428 ts->kind = gfc_default_logical_kind;
2432 m = gfc_match (" type ( %n )", name);
2434 ts->type = BT_DERIVED;
2437 m = gfc_match (" class ( %n )", name);
2440 ts->type = BT_CLASS;
2442 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2447 /* Defer association of the derived type until the end of the
2448 specification block. However, if the derived type can be
2449 found, add it to the typespec. */
2450 if (gfc_matching_function)
2452 ts->u.derived = NULL;
2453 if (gfc_current_state () != COMP_INTERFACE
2454 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2455 ts->u.derived = sym;
2459 /* Search for the name but allow the components to be defined later. If
2460 type = -1, this typespec has been seen in a function declaration but
2461 the type could not be accessed at that point. */
2463 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2465 gfc_error ("Type name '%s' at %C is ambiguous", name);
2468 else if (ts->kind == -1)
2470 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2471 || gfc_current_ns->has_import_set;
2472 if (gfc_find_symbol (name, NULL, iface, &sym))
2474 gfc_error ("Type name '%s' at %C is ambiguous", name);
2483 if (sym->attr.flavor != FL_DERIVED
2484 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2487 gfc_set_sym_referenced (sym);
2488 ts->u.derived = sym;
2493 /* For all types except double, derived and character, look for an
2494 optional kind specifier. MATCH_NO is actually OK at this point. */
2495 if (implicit_flag == 1)
2498 if (gfc_current_form == FORM_FREE)
2500 c = gfc_peek_ascii_char ();
2501 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2502 && c != ':' && c != ',')
2506 m = gfc_match_kind_spec (ts, false);
2507 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2508 m = gfc_match_old_kind_spec (ts);
2510 /* Defer association of the KIND expression of function results
2511 until after USE and IMPORT statements. */
2512 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2513 || gfc_matching_function)
2517 m = MATCH_YES; /* No kind specifier found. */
2523 /* Match an IMPLICIT NONE statement. Actually, this statement is
2524 already matched in parse.c, or we would not end up here in the
2525 first place. So the only thing we need to check, is if there is
2526 trailing garbage. If not, the match is successful. */
2529 gfc_match_implicit_none (void)
2531 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2535 /* Match the letter range(s) of an IMPLICIT statement. */
2538 match_implicit_range (void)
2544 cur_loc = gfc_current_locus;
2546 gfc_gobble_whitespace ();
2547 c = gfc_next_ascii_char ();
2550 gfc_error ("Missing character range in IMPLICIT at %C");
2557 gfc_gobble_whitespace ();
2558 c1 = gfc_next_ascii_char ();
2562 gfc_gobble_whitespace ();
2563 c = gfc_next_ascii_char ();
2568 inner = 0; /* Fall through. */
2575 gfc_gobble_whitespace ();
2576 c2 = gfc_next_ascii_char ();
2580 gfc_gobble_whitespace ();
2581 c = gfc_next_ascii_char ();
2583 if ((c != ',') && (c != ')'))
2596 gfc_error ("Letters must be in alphabetic order in "
2597 "IMPLICIT statement at %C");
2601 /* See if we can add the newly matched range to the pending
2602 implicits from this IMPLICIT statement. We do not check for
2603 conflicts with whatever earlier IMPLICIT statements may have
2604 set. This is done when we've successfully finished matching
2606 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2613 gfc_syntax_error (ST_IMPLICIT);
2615 gfc_current_locus = cur_loc;
2620 /* Match an IMPLICIT statement, storing the types for
2621 gfc_set_implicit() if the statement is accepted by the parser.
2622 There is a strange looking, but legal syntactic construction
2623 possible. It looks like:
2625 IMPLICIT INTEGER (a-b) (c-d)
2627 This is legal if "a-b" is a constant expression that happens to
2628 equal one of the legal kinds for integers. The real problem
2629 happens with an implicit specification that looks like:
2631 IMPLICIT INTEGER (a-b)
2633 In this case, a typespec matcher that is "greedy" (as most of the
2634 matchers are) gobbles the character range as a kindspec, leaving
2635 nothing left. We therefore have to go a bit more slowly in the
2636 matching process by inhibiting the kindspec checking during
2637 typespec matching and checking for a kind later. */
2640 gfc_match_implicit (void)
2649 /* We don't allow empty implicit statements. */
2650 if (gfc_match_eos () == MATCH_YES)
2652 gfc_error ("Empty IMPLICIT statement at %C");
2658 /* First cleanup. */
2659 gfc_clear_new_implicit ();
2661 /* A basic type is mandatory here. */
2662 m = gfc_match_decl_type_spec (&ts, 1);
2663 if (m == MATCH_ERROR)
2668 cur_loc = gfc_current_locus;
2669 m = match_implicit_range ();
2673 /* We may have <TYPE> (<RANGE>). */
2674 gfc_gobble_whitespace ();
2675 c = gfc_next_ascii_char ();
2676 if ((c == '\n') || (c == ','))
2678 /* Check for CHARACTER with no length parameter. */
2679 if (ts.type == BT_CHARACTER && !ts.u.cl)
2681 ts.kind = gfc_default_character_kind;
2682 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2683 ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind,
2687 /* Record the Successful match. */
2688 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2693 gfc_current_locus = cur_loc;
2696 /* Discard the (incorrectly) matched range. */
2697 gfc_clear_new_implicit ();
2699 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2700 if (ts.type == BT_CHARACTER)
2701 m = gfc_match_char_spec (&ts);
2704 m = gfc_match_kind_spec (&ts, false);
2707 m = gfc_match_old_kind_spec (&ts);
2708 if (m == MATCH_ERROR)
2714 if (m == MATCH_ERROR)
2717 m = match_implicit_range ();
2718 if (m == MATCH_ERROR)
2723 gfc_gobble_whitespace ();
2724 c = gfc_next_ascii_char ();
2725 if ((c != '\n') && (c != ','))
2728 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2736 gfc_syntax_error (ST_IMPLICIT);
2744 gfc_match_import (void)
2746 char name[GFC_MAX_SYMBOL_LEN + 1];
2751 if (gfc_current_ns->proc_name == NULL
2752 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2754 gfc_error ("IMPORT statement at %C only permitted in "
2755 "an INTERFACE body");
2759 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2763 if (gfc_match_eos () == MATCH_YES)
2765 /* All host variables should be imported. */
2766 gfc_current_ns->has_import_set = 1;
2770 if (gfc_match (" ::") == MATCH_YES)
2772 if (gfc_match_eos () == MATCH_YES)
2774 gfc_error ("Expecting list of named entities at %C");
2781 m = gfc_match (" %n", name);
2785 if (gfc_current_ns->parent != NULL
2786 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2788 gfc_error ("Type name '%s' at %C is ambiguous", name);
2791 else if (gfc_current_ns->proc_name->ns->parent != NULL
2792 && gfc_find_symbol (name,
2793 gfc_current_ns->proc_name->ns->parent,
2796 gfc_error ("Type name '%s' at %C is ambiguous", name);
2802 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2803 "at %C - does not exist.", name);
2807 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2809 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2814 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2817 sym->attr.imported = 1;
2829 if (gfc_match_eos () == MATCH_YES)
2831 if (gfc_match_char (',') != MATCH_YES)
2838 gfc_error ("Syntax error in IMPORT statement at %C");
2843 /* A minimal implementation of gfc_match without whitespace, escape
2844 characters or variable arguments. Returns true if the next
2845 characters match the TARGET template exactly. */
2848 match_string_p (const char *target)
2852 for (p = target; *p; p++)
2853 if ((char) gfc_next_ascii_char () != *p)
2858 /* Matches an attribute specification including array specs. If
2859 successful, leaves the variables current_attr and current_as
2860 holding the specification. Also sets the colon_seen variable for
2861 later use by matchers associated with initializations.
2863 This subroutine is a little tricky in the sense that we don't know
2864 if we really have an attr-spec until we hit the double colon.
2865 Until that time, we can only return MATCH_NO. This forces us to
2866 check for duplicate specification at this level. */
2869 match_attr_spec (void)
2871 /* Modifiers that can exist in a type statement. */
2873 { GFC_DECL_BEGIN = 0,
2874 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2875 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2876 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2877 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2878 DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_NONE,
2879 GFC_DECL_END /* Sentinel */
2883 /* GFC_DECL_END is the sentinel, index starts at 0. */
2884 #define NUM_DECL GFC_DECL_END
2886 locus start, seen_at[NUM_DECL];
2893 gfc_clear_attr (¤t_attr);
2894 start = gfc_current_locus;
2899 /* See if we get all of the keywords up to the final double colon. */
2900 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2908 gfc_gobble_whitespace ();
2910 ch = gfc_next_ascii_char ();
2913 /* This is the successful exit condition for the loop. */
2914 if (gfc_next_ascii_char () == ':')
2919 gfc_gobble_whitespace ();
2920 switch (gfc_peek_ascii_char ())
2923 gfc_next_ascii_char ();
2924 switch (gfc_next_ascii_char ())
2927 if (match_string_p ("locatable"))
2929 /* Matched "allocatable". */
2930 d = DECL_ALLOCATABLE;
2935 if (match_string_p ("ynchronous"))
2937 /* Matched "asynchronous". */
2938 d = DECL_ASYNCHRONOUS;
2944 /* Try and match the bind(c). */
2945 m = gfc_match_bind_c (NULL, true);
2948 else if (m == MATCH_ERROR)
2953 if (match_string_p ("codimension"))
2954 d = DECL_CODIMENSION;
2958 if (match_string_p ("dimension"))
2963 if (match_string_p ("external"))
2968 if (match_string_p ("int"))
2970 ch = gfc_next_ascii_char ();
2973 if (match_string_p ("nt"))
2975 /* Matched "intent". */
2976 /* TODO: Call match_intent_spec from here. */
2977 if (gfc_match (" ( in out )") == MATCH_YES)
2979 else if (gfc_match (" ( in )") == MATCH_YES)
2981 else if (gfc_match (" ( out )") == MATCH_YES)
2987 if (match_string_p ("insic"))
2989 /* Matched "intrinsic". */
2997 if (match_string_p ("optional"))
3002 gfc_next_ascii_char ();
3003 switch (gfc_next_ascii_char ())
3006 if (match_string_p ("rameter"))
3008 /* Matched "parameter". */
3014 if (match_string_p ("inter"))
3016 /* Matched "pointer". */
3022 ch = gfc_next_ascii_char ();
3025 if (match_string_p ("vate"))
3027 /* Matched "private". */
3033 if (match_string_p ("tected"))
3035 /* Matched "protected". */
3042 if (match_string_p ("blic"))
3044 /* Matched "public". */
3052 if (match_string_p ("save"))
3057 if (match_string_p ("target"))
3062 gfc_next_ascii_char ();
3063 ch = gfc_next_ascii_char ();
3066 if (match_string_p ("lue"))
3068 /* Matched "value". */
3074 if (match_string_p ("latile"))
3076 /* Matched "volatile". */
3084 /* No double colon and no recognizable decl_type, so assume that
3085 we've been looking at something else the whole time. */
3092 /* Check to make sure any parens are paired up correctly. */
3093 if (gfc_match_parens () == MATCH_ERROR)
3100 seen_at[d] = gfc_current_locus;
3102 if (d == DECL_DIMENSION || d == DECL_CODIMENSION)
3104 m = gfc_match_array_spec (¤t_as, true, false);
3108 if (d == DECL_CODIMENSION)
3109 gfc_error ("Missing codimension specification at %C");
3111 gfc_error ("Missing dimension specification at %C");
3115 if (m == MATCH_ERROR)
3119 if (d == DECL_CODIMENSION)
3121 m = gfc_match_array_spec (¤t_as, false, true);
3125 gfc_error ("Missing codimension specification at %C");
3129 if (m == MATCH_ERROR)
3134 /* Since we've seen a double colon, we have to be looking at an
3135 attr-spec. This means that we can now issue errors. */
3136 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3141 case DECL_ALLOCATABLE:
3142 attr = "ALLOCATABLE";
3144 case DECL_ASYNCHRONOUS:
3145 attr = "ASYNCHRONOUS";
3147 case DECL_CODIMENSION:
3148 attr = "CODIMENSION";
3150 case DECL_DIMENSION:
3157 attr = "INTENT (IN)";
3160 attr = "INTENT (OUT)";
3163 attr = "INTENT (IN OUT)";
3165 case DECL_INTRINSIC:
3171 case DECL_PARAMETER:
3177 case DECL_PROTECTED:
3192 case DECL_IS_BIND_C:
3202 attr = NULL; /* This shouldn't happen. */
3205 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3210 /* Now that we've dealt with duplicate attributes, add the attributes
3211 to the current attribute. */
3212 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3217 if (gfc_current_state () == COMP_DERIVED
3218 && d != DECL_DIMENSION && d != DECL_CODIMENSION
3219 && d != DECL_POINTER && d != DECL_PRIVATE
3220 && d != DECL_PUBLIC && d != DECL_NONE)
3222 if (d == DECL_ALLOCATABLE)
3224 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3225 "attribute at %C in a TYPE definition")
3234 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3241 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3242 && gfc_current_state () != COMP_MODULE)
3244 if (d == DECL_PRIVATE)
3248 if (gfc_current_state () == COMP_DERIVED
3249 && gfc_state_stack->previous
3250 && gfc_state_stack->previous->state == COMP_MODULE)
3252 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3253 "at %L in a TYPE definition", attr,
3263 gfc_error ("%s attribute at %L is not allowed outside of the "
3264 "specification part of a module", attr, &seen_at[d]);
3272 case DECL_ALLOCATABLE:
3273 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3276 case DECL_ASYNCHRONOUS:
3277 if (gfc_notify_std (GFC_STD_F2003,
3278 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3282 t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]);
3285 case DECL_CODIMENSION:
3286 t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]);
3289 case DECL_DIMENSION:
3290 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3294 t = gfc_add_external (¤t_attr, &seen_at[d]);
3298 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3302 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3306 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3309 case DECL_INTRINSIC:
3310 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3314 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3317 case DECL_PARAMETER:
3318 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3322 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3325 case DECL_PROTECTED:
3326 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3328 gfc_error ("PROTECTED at %C only allowed in specification "
3329 "part of a module");
3334 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3339 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3343 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3348 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3353 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3357 t = gfc_add_target (¤t_attr, &seen_at[d]);
3360 case DECL_IS_BIND_C:
3361 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3365 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3370 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3374 if (gfc_notify_std (GFC_STD_F2003,
3375 "Fortran 2003: VOLATILE attribute at %C")
3379 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3383 gfc_internal_error ("match_attr_spec(): Bad attribute");
3397 gfc_current_locus = start;
3398 gfc_free_array_spec (current_as);
3404 /* Set the binding label, dest_label, either with the binding label
3405 stored in the given gfc_typespec, ts, or if none was provided, it
3406 will be the symbol name in all lower case, as required by the draft
3407 (J3/04-007, section 15.4.1). If a binding label was given and
3408 there is more than one argument (num_idents), it is an error. */
3411 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3413 if (num_idents > 1 && has_name_equals)
3415 gfc_error ("Multiple identifiers provided with "
3416 "single NAME= specifier at %C");
3420 if (curr_binding_label[0] != '\0')
3422 /* Binding label given; store in temp holder til have sym. */
3423 strcpy (dest_label, curr_binding_label);
3427 /* No binding label given, and the NAME= specifier did not exist,
3428 which means there was no NAME="". */
3429 if (sym_name != NULL && has_name_equals == 0)
3430 strcpy (dest_label, sym_name);
3437 /* Set the status of the given common block as being BIND(C) or not,
3438 depending on the given parameter, is_bind_c. */
3441 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3443 com_block->is_bind_c = is_bind_c;
3448 /* Verify that the given gfc_typespec is for a C interoperable type. */
3451 verify_c_interop (gfc_typespec *ts)
3453 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3454 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3455 else if (ts->is_c_interop != 1)
3462 /* Verify that the variables of a given common block, which has been
3463 defined with the attribute specifier bind(c), to be of a C
3464 interoperable type. Errors will be reported here, if
3468 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3470 gfc_symbol *curr_sym = NULL;
3471 gfc_try retval = SUCCESS;
3473 curr_sym = com_block->head;
3475 /* Make sure we have at least one symbol. */
3476 if (curr_sym == NULL)
3479 /* Here we know we have a symbol, so we'll execute this loop
3483 /* The second to last param, 1, says this is in a common block. */
3484 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3485 curr_sym = curr_sym->common_next;
3486 } while (curr_sym != NULL);
3492 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3493 an appropriate error message is reported. */
3496 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3497 int is_in_common, gfc_common_head *com_block)
3499 bool bind_c_function = false;
3500 gfc_try retval = SUCCESS;
3502 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3503 bind_c_function = true;
3505 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3507 tmp_sym = tmp_sym->result;
3508 /* Make sure it wasn't an implicitly typed result. */
3509 if (tmp_sym->attr.implicit_type)
3511 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3512 "%L may not be C interoperable", tmp_sym->name,
3513 &tmp_sym->declared_at);
3514 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3515 /* Mark it as C interoperable to prevent duplicate warnings. */
3516 tmp_sym->ts.is_c_interop = 1;
3517 tmp_sym->attr.is_c_interop = 1;
3521 /* Here, we know we have the bind(c) attribute, so if we have
3522 enough type info, then verify that it's a C interop kind.
3523 The info could be in the symbol already, or possibly still in
3524 the given ts (current_ts), so look in both. */
3525 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3527 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3529 /* See if we're dealing with a sym in a common block or not. */
3530 if (is_in_common == 1)
3532 gfc_warning ("Variable '%s' in common block '%s' at %L "
3533 "may not be a C interoperable "
3534 "kind though common block '%s' is BIND(C)",
3535 tmp_sym->name, com_block->name,
3536 &(tmp_sym->declared_at), com_block->name);
3540 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3541 gfc_error ("Type declaration '%s' at %L is not C "
3542 "interoperable but it is BIND(C)",
3543 tmp_sym->name, &(tmp_sym->declared_at));
3545 gfc_warning ("Variable '%s' at %L "
3546 "may not be a C interoperable "
3547 "kind but it is bind(c)",
3548 tmp_sym->name, &(tmp_sym->declared_at));
3552 /* Variables declared w/in a common block can't be bind(c)
3553 since there's no way for C to see these variables, so there's
3554 semantically no reason for the attribute. */
3555 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3557 gfc_error ("Variable '%s' in common block '%s' at "
3558 "%L cannot be declared with BIND(C) "
3559 "since it is not a global",
3560 tmp_sym->name, com_block->name,
3561 &(tmp_sym->declared_at));
3565 /* Scalar variables that are bind(c) can not have the pointer
3566 or allocatable attributes. */
3567 if (tmp_sym->attr.is_bind_c == 1)
3569 if (tmp_sym->attr.pointer == 1)
3571 gfc_error ("Variable '%s' at %L cannot have both the "
3572 "POINTER and BIND(C) attributes",
3573 tmp_sym->name, &(tmp_sym->declared_at));
3577 if (tmp_sym->attr.allocatable == 1)
3579 gfc_error ("Variable '%s' at %L cannot have both the "
3580 "ALLOCATABLE and BIND(C) attributes",
3581 tmp_sym->name, &(tmp_sym->declared_at));
3587 /* If it is a BIND(C) function, make sure the return value is a
3588 scalar value. The previous tests in this function made sure
3589 the type is interoperable. */
3590 if (bind_c_function && tmp_sym->as != NULL)
3591 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3592 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3594 /* BIND(C) functions can not return a character string. */
3595 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3596 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3597 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3598 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3599 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3600 "be a character string", tmp_sym->name,
3601 &(tmp_sym->declared_at));
3604 /* See if the symbol has been marked as private. If it has, make sure
3605 there is no binding label and warn the user if there is one. */
3606 if (tmp_sym->attr.access == ACCESS_PRIVATE
3607 && tmp_sym->binding_label[0] != '\0')
3608 /* Use gfc_warning_now because we won't say that the symbol fails
3609 just because of this. */
3610 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3611 "given the binding label '%s'", tmp_sym->name,
3612 &(tmp_sym->declared_at), tmp_sym->binding_label);
3618 /* Set the appropriate fields for a symbol that's been declared as
3619 BIND(C) (the is_bind_c flag and the binding label), and verify that
3620 the type is C interoperable. Errors are reported by the functions
3621 used to set/test these fields. */
3624 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3626 gfc_try retval = SUCCESS;
3628 /* TODO: Do we need to make sure the vars aren't marked private? */
3630 /* Set the is_bind_c bit in symbol_attribute. */
3631 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3633 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3634 num_idents) != SUCCESS)
3641 /* Set the fields marking the given common block as BIND(C), including
3642 a binding label, and report any errors encountered. */
3645 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3647 gfc_try retval = SUCCESS;
3649 /* destLabel, common name, typespec (which may have binding label). */
3650 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3654 /* Set the given common block (com_block) to being bind(c) (1). */
3655 set_com_block_bind_c (com_block, 1);
3661 /* Retrieve the list of one or more identifiers that the given bind(c)
3662 attribute applies to. */
3665 get_bind_c_idents (void)
3667 char name[GFC_MAX_SYMBOL_LEN + 1];
3669 gfc_symbol *tmp_sym = NULL;
3671 gfc_common_head *com_block = NULL;
3673 if (gfc_match_name (name) == MATCH_YES)
3675 found_id = MATCH_YES;
3676 gfc_get_ha_symbol (name, &tmp_sym);
3678 else if (match_common_name (name) == MATCH_YES)
3680 found_id = MATCH_YES;
3681 com_block = gfc_get_common (name, 0);
3685 gfc_error ("Need either entity or common block name for "
3686 "attribute specification statement at %C");
3690 /* Save the current identifier and look for more. */
3693 /* Increment the number of identifiers found for this spec stmt. */
3696 /* Make sure we have a sym or com block, and verify that it can
3697 be bind(c). Set the appropriate field(s) and look for more
3699 if (tmp_sym != NULL || com_block != NULL)
3701 if (tmp_sym != NULL)
3703 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3709 if (set_verify_bind_c_com_block(com_block, num_idents)
3714 /* Look to see if we have another identifier. */
3716 if (gfc_match_eos () == MATCH_YES)
3717 found_id = MATCH_NO;
3718 else if (gfc_match_char (',') != MATCH_YES)
3719 found_id = MATCH_NO;
3720 else if (gfc_match_name (name) == MATCH_YES)
3722 found_id = MATCH_YES;
3723 gfc_get_ha_symbol (name, &tmp_sym);
3725 else if (match_common_name (name) == MATCH_YES)
3727 found_id = MATCH_YES;
3728 com_block = gfc_get_common (name, 0);
3732 gfc_error ("Missing entity or common block name for "
3733 "attribute specification statement at %C");
3739 gfc_internal_error ("Missing symbol");
3741 } while (found_id == MATCH_YES);
3743 /* if we get here we were successful */
3748 /* Try and match a BIND(C) attribute specification statement. */
3751 gfc_match_bind_c_stmt (void)
3753 match found_match = MATCH_NO;
3758 /* This may not be necessary. */
3760 /* Clear the temporary binding label holder. */
3761 curr_binding_label[0] = '\0';
3763 /* Look for the bind(c). */
3764 found_match = gfc_match_bind_c (NULL, true);
3766 if (found_match == MATCH_YES)
3768 /* Look for the :: now, but it is not required. */
3771 /* Get the identifier(s) that needs to be updated. This may need to
3772 change to hand the flag(s) for the attr specified so all identifiers
3773 found can have all appropriate parts updated (assuming that the same
3774 spec stmt can have multiple attrs, such as both bind(c) and
3776 if (get_bind_c_idents () != SUCCESS)
3777 /* Error message should have printed already. */
3785 /* Match a data declaration statement. */
3788 gfc_match_data_decl (void)
3794 num_idents_on_line = 0;
3796 m = gfc_match_decl_type_spec (¤t_ts, 0);
3800 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3801 && gfc_current_state () != COMP_DERIVED)
3803 sym = gfc_use_derived (current_ts.u.derived);
3811 current_ts.u.derived = sym;
3814 m = match_attr_spec ();
3815 if (m == MATCH_ERROR)
3821 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3822 && current_ts.u.derived->components == NULL
3823 && !current_ts.u.derived->attr.zero_comp)
3826 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3829 gfc_find_symbol (current_ts.u.derived->name,
3830 current_ts.u.derived->ns->parent, 1, &sym);
3832 /* Any symbol that we find had better be a type definition
3833 which has its components defined. */
3834 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3835 && (current_ts.u.derived->components != NULL
3836 || current_ts.u.derived->attr.zero_comp))
3839 /* Now we have an error, which we signal, and then fix up
3840 because the knock-on is plain and simple confusing. */
3841 gfc_error_now ("Derived type at %C has not been previously defined "
3842 "and so cannot appear in a derived type definition");
3843 current_attr.pointer = 1;
3848 /* If we have an old-style character declaration, and no new-style
3849 attribute specifications, then there a comma is optional between
3850 the type specification and the variable list. */
3851 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3852 gfc_match_char (',');
3854 /* Give the types/attributes to symbols that follow. Give the element
3855 a number so that repeat character length expressions can be copied. */
3859 num_idents_on_line++;
3860 m = variable_decl (elem++);
3861 if (m == MATCH_ERROR)
3866 if (gfc_match_eos () == MATCH_YES)
3868 if (gfc_match_char (',') != MATCH_YES)
3872 if (gfc_error_flag_test () == 0)
3873 gfc_error ("Syntax error in data declaration at %C");
3876 gfc_free_data_all (gfc_current_ns);
3879 gfc_free_array_spec (current_as);
3885 /* Match a prefix associated with a function or subroutine
3886 declaration. If the typespec pointer is nonnull, then a typespec
3887 can be matched. Note that if nothing matches, MATCH_YES is
3888 returned (the null string was matched). */
3891 gfc_match_prefix (gfc_typespec *ts)
3895 gfc_clear_attr (¤t_attr);
3898 gcc_assert (!gfc_matching_prefix);
3899 gfc_matching_prefix = true;
3902 if (!seen_type && ts != NULL
3903 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3904 && gfc_match_space () == MATCH_YES)
3911 if (gfc_match ("elemental% ") == MATCH_YES)
3913 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3919 if (gfc_match ("pure% ") == MATCH_YES)
3921 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3927 if (gfc_match ("recursive% ") == MATCH_YES)
3929 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3935 /* At this point, the next item is not a prefix. */
3936 gcc_assert (gfc_matching_prefix);
3937 gfc_matching_prefix = false;
3941 gcc_assert (gfc_matching_prefix);
3942 gfc_matching_prefix = false;
3947 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3950 copy_prefix (symbol_attribute *dest, locus *where)
3952 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3955 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3958 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3965 /* Match a formal argument list. */
3968 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3970 gfc_formal_arglist *head, *tail, *p, *q;
3971 char name[GFC_MAX_SYMBOL_LEN + 1];
3977 if (gfc_match_char ('(') != MATCH_YES)
3984 if (gfc_match_char (')') == MATCH_YES)
3989 if (gfc_match_char ('*') == MATCH_YES)
3993 m = gfc_match_name (name);
3997 if (gfc_get_symbol (name, NULL, &sym))
4001 p = gfc_get_formal_arglist ();
4013 /* We don't add the VARIABLE flavor because the name could be a
4014 dummy procedure. We don't apply these attributes to formal
4015 arguments of statement functions. */
4016 if (sym != NULL && !st_flag
4017 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
4018 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
4024 /* The name of a program unit can be in a different namespace,
4025 so check for it explicitly. After the statement is accepted,
4026 the name is checked for especially in gfc_get_symbol(). */
4027 if (gfc_new_block != NULL && sym != NULL
4028 && strcmp (sym->name, gfc_new_block->name) == 0)
4030 gfc_error ("Name '%s' at %C is the name of the procedure",
4036 if (gfc_match_char (')') == MATCH_YES)
4039 m = gfc_match_char (',');
4042 gfc_error ("Unexpected junk in formal argument list at %C");
4048 /* Check for duplicate symbols in the formal argument list. */
4051 for (p = head; p->next; p = p->next)
4056 for (q = p->next; q; q = q->next)
4057 if (p->sym == q->sym)
4059 gfc_error ("Duplicate symbol '%s' in formal argument list "
4060 "at %C", p->sym->name);
4068 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
4078 gfc_free_formal_arglist (head);
4083 /* Match a RESULT specification following a function declaration or
4084 ENTRY statement. Also matches the end-of-statement. */
4087 match_result (gfc_symbol *function, gfc_symbol **result)
4089 char name[GFC_MAX_SYMBOL_LEN + 1];
4093 if (gfc_match (" result (") != MATCH_YES)
4096 m = gfc_match_name (name);
4100 /* Get the right paren, and that's it because there could be the
4101 bind(c) attribute after the result clause. */
4102 if (gfc_match_char(')') != MATCH_YES)
4104 /* TODO: should report the missing right paren here. */
4108 if (strcmp (function->name, name) == 0)
4110 gfc_error ("RESULT variable at %C must be different than function name");
4114 if (gfc_get_symbol (name, NULL, &r))
4117 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4126 /* Match a function suffix, which could be a combination of a result
4127 clause and BIND(C), either one, or neither. The draft does not
4128 require them to come in a specific order. */
4131 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4133 match is_bind_c; /* Found bind(c). */
4134 match is_result; /* Found result clause. */
4135 match found_match; /* Status of whether we've found a good match. */
4136 char peek_char; /* Character we're going to peek at. */
4137 bool allow_binding_name;
4139 /* Initialize to having found nothing. */
4140 found_match = MATCH_NO;
4141 is_bind_c = MATCH_NO;
4142 is_result = MATCH_NO;
4144 /* Get the next char to narrow between result and bind(c). */
4145 gfc_gobble_whitespace ();
4146 peek_char = gfc_peek_ascii_char ();
4148 /* C binding names are not allowed for internal procedures. */
4149 if (gfc_current_state () == COMP_CONTAINS
4150 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4151 allow_binding_name = false;
4153 allow_binding_name = true;
4158 /* Look for result clause. */
4159 is_result = match_result (sym, result);
4160 if (is_result == MATCH_YES)
4162 /* Now see if there is a bind(c) after it. */
4163 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4164 /* We've found the result clause and possibly bind(c). */
4165 found_match = MATCH_YES;
4168 /* This should only be MATCH_ERROR. */
4169 found_match = is_result;
4172 /* Look for bind(c) first. */
4173 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4174 if (is_bind_c == MATCH_YES)
4176 /* Now see if a result clause followed it. */
4177 is_result = match_result (sym, result);
4178 found_match = MATCH_YES;
4182 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4183 found_match = MATCH_ERROR;
4187 gfc_error ("Unexpected junk after function declaration at %C");
4188 found_match = MATCH_ERROR;
4192 if (is_bind_c == MATCH_YES)
4194 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4195 if (gfc_current_state () == COMP_CONTAINS
4196 && sym->ns->proc_name->attr.flavor != FL_MODULE
4197 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4198 "at %L may not be specified for an internal "
4199 "procedure", &gfc_current_locus)
4203 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4212 /* Procedure pointer return value without RESULT statement:
4213 Add "hidden" result variable named "ppr@". */
4216 add_hidden_procptr_result (gfc_symbol *sym)
4220 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4223 /* First usage case: PROCEDURE and EXTERNAL statements. */
4224 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4225 && strcmp (gfc_current_block ()->name, sym->name) == 0
4226 && sym->attr.external;
4227 /* Second usage case: INTERFACE statements. */
4228 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4229 && gfc_state_stack->previous->state == COMP_FUNCTION
4230 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4236 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4240 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4241 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4242 st2->n.sym = stree->n.sym;
4244 sym->result = stree->n.sym;
4246 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4247 sym->result->attr.pointer = sym->attr.pointer;
4248 sym->result->attr.external = sym->attr.external;
4249 sym->result->attr.referenced = sym->attr.referenced;
4250 sym->result->ts = sym->ts;
4251 sym->attr.proc_pointer = 0;
4252 sym->attr.pointer = 0;
4253 sym->attr.external = 0;
4254 if (sym->result->attr.external && sym->result->attr.pointer)
4256 sym->result->attr.pointer = 0;
4257 sym->result->attr.proc_pointer = 1;
4260 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4262 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4263 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4264 && sym->result && sym->result != sym && sym->result->attr.external
4265 && sym == gfc_current_ns->proc_name
4266 && sym == sym->result->ns->proc_name
4267 && strcmp ("ppr@", sym->result->name) == 0)
4269 sym->result->attr.proc_pointer = 1;
4270 sym->attr.pointer = 0;
4278 /* Match the interface for a PROCEDURE declaration,
4279 including brackets (R1212). */
4282 match_procedure_interface (gfc_symbol **proc_if)
4286 locus old_loc, entry_loc;
4287 gfc_namespace *old_ns = gfc_current_ns;
4288 char name[GFC_MAX_SYMBOL_LEN + 1];
4290 old_loc = entry_loc = gfc_current_locus;
4291 gfc_clear_ts (¤t_ts);
4293 if (gfc_match (" (") != MATCH_YES)
4295 gfc_current_locus = entry_loc;
4299 /* Get the type spec. for the procedure interface. */
4300 old_loc = gfc_current_locus;
4301 m = gfc_match_decl_type_spec (¤t_ts, 0);
4302 gfc_gobble_whitespace ();
4303 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4306 if (m == MATCH_ERROR)
4309 /* Procedure interface is itself a procedure. */
4310 gfc_current_locus = old_loc;
4311 m = gfc_match_name (name);
4313 /* First look to see if it is already accessible in the current
4314 namespace because it is use associated or contained. */
4316 if (gfc_find_sym_tree (name, NULL, 0, &st))
4319 /* If it is still not found, then try the parent namespace, if it
4320 exists and create the symbol there if it is still not found. */
4321 if (gfc_current_ns->parent)
4322 gfc_current_ns = gfc_current_ns->parent;
4323 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4326 gfc_current_ns = old_ns;
4327 *proc_if = st->n.sym;
4329 /* Various interface checks. */
4333 /* Resolve interface if possible. That way, attr.procedure is only set
4334 if it is declared by a later procedure-declaration-stmt, which is
4335 invalid per C1212. */
4336 while ((*proc_if)->ts.interface)
4337 *proc_if = (*proc_if)->ts.interface;
4339 if ((*proc_if)->generic)
4341 gfc_error ("Interface '%s' at %C may not be generic",
4345 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4347 gfc_error ("Interface '%s' at %C may not be a statement function",
4351 /* Handle intrinsic procedures. */
4352 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4353 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4354 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4355 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4356 (*proc_if)->attr.intrinsic = 1;
4357 if ((*proc_if)->attr.intrinsic
4358 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4360 gfc_error ("Intrinsic procedure '%s' not allowed "
4361 "in PROCEDURE statement at %C", (*proc_if)->name);
4367 if (gfc_match (" )") != MATCH_YES)
4369 gfc_current_locus = entry_loc;
4377 /* Match a PROCEDURE declaration (R1211). */
4380 match_procedure_decl (void)
4383 gfc_symbol *sym, *proc_if = NULL;
4385 gfc_expr *initializer = NULL;
4387 /* Parse interface (with brackets). */
4388 m = match_procedure_interface (&proc_if);
4392 /* Parse attributes (with colons). */
4393 m = match_attr_spec();
4394 if (m == MATCH_ERROR)
4397 /* Get procedure symbols. */
4400 m = gfc_match_symbol (&sym, 0);
4403 else if (m == MATCH_ERROR)
4406 /* Add current_attr to the symbol attributes. */
4407 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4410 if (sym->attr.is_bind_c)
4412 /* Check for C1218. */
4413 if (!proc_if || !proc_if->attr.is_bind_c)
4415 gfc_error ("BIND(C) attribute at %C requires "
4416 "an interface with BIND(C)");
4419 /* Check for C1217. */
4420 if (has_name_equals && sym->attr.pointer)
4422 gfc_error ("BIND(C) procedure with NAME may not have "
4423 "POINTER attribute at %C");
4426 if (has_name_equals && sym->attr.dummy)
4428 gfc_error ("Dummy procedure at %C may not have "
4429 "BIND(C) attribute with NAME");
4432 /* Set binding label for BIND(C). */
4433 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4437 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4440 if (add_hidden_procptr_result (sym) == SUCCESS)
4443 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4446 /* Set interface. */
4447 if (proc_if != NULL)
4449 if (sym->ts.type != BT_UNKNOWN)
4451 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4452 sym->name, &gfc_current_locus,
4453 gfc_basic_typename (sym->ts.type));
4456 sym->ts.interface = proc_if;
4457 sym->attr.untyped = 1;
4458 sym->attr.if_source = IFSRC_IFBODY;
4460 else if (current_ts.type != BT_UNKNOWN)
4462 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4464 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4465 sym->ts.interface->ts = current_ts;
4466 sym->ts.interface->attr.function = 1;
4467 sym->attr.function = sym->ts.interface->attr.function;
4468 sym->attr.if_source = IFSRC_UNKNOWN;
4471 if (gfc_match (" =>") == MATCH_YES)
4473 if (!current_attr.pointer)
4475 gfc_error ("Initialization at %C isn't for a pointer variable");
4480 m = gfc_match_null (&initializer);
4483 gfc_error ("Pointer initialization requires a NULL() at %C");
4487 if (gfc_pure (NULL))
4489 gfc_error ("Initialization of pointer at %C is not allowed in "
4490 "a PURE procedure");
4497 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4503 gfc_set_sym_referenced (sym);
4505 if (gfc_match_eos () == MATCH_YES)
4507 if (gfc_match_char (',') != MATCH_YES)
4512 gfc_error ("Syntax error in PROCEDURE statement at %C");
4516 /* Free stuff up and return. */
4517 gfc_free_expr (initializer);
4523 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4526 /* Match a procedure pointer component declaration (R445). */
4529 match_ppc_decl (void)
4532 gfc_symbol *proc_if = NULL;
4536 gfc_expr *initializer = NULL;
4537 gfc_typebound_proc* tb;
4538 char name[GFC_MAX_SYMBOL_LEN + 1];
4540 /* Parse interface (with brackets). */
4541 m = match_procedure_interface (&proc_if);
4545 /* Parse attributes. */
4546 tb = XCNEW (gfc_typebound_proc);
4547 tb->where = gfc_current_locus;
4548 m = match_binding_attributes (tb, false, true);
4549 if (m == MATCH_ERROR)
4552 gfc_clear_attr (¤t_attr);
4553 current_attr.procedure = 1;
4554 current_attr.proc_pointer = 1;
4555 current_attr.access = tb->access;
4556 current_attr.flavor = FL_PROCEDURE;
4558 /* Match the colons (required). */
4559 if (gfc_match (" ::") != MATCH_YES)
4561 gfc_error ("Expected '::' after binding-attributes at %C");
4565 /* Check for C450. */
4566 if (!tb->nopass && proc_if == NULL)
4568 gfc_error("NOPASS or explicit interface required at %C");
4572 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4573 "component at %C") == FAILURE)
4576 /* Match PPC names. */
4580 m = gfc_match_name (name);
4583 else if (m == MATCH_ERROR)
4586 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4589 /* Add current_attr to the symbol attributes. */
4590 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4593 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4596 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4601 /* Set interface. */
4602 if (proc_if != NULL)
4604 c->ts.interface = proc_if;
4605 c->attr.untyped = 1;
4606 c->attr.if_source = IFSRC_IFBODY;
4608 else if (ts.type != BT_UNKNOWN)
4611 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4612 c->ts.interface->ts = ts;
4613 c->ts.interface->attr.function = 1;
4614 c->attr.function = c->ts.interface->attr.function;
4615 c->attr.if_source = IFSRC_UNKNOWN;
4618 if (gfc_match (" =>") == MATCH_YES)
4620 m = gfc_match_null (&initializer);
4623 gfc_error ("Pointer initialization requires a NULL() at %C");
4626 if (gfc_pure (NULL))
4628 gfc_error ("Initialization of pointer at %C is not allowed in "
4629 "a PURE procedure");
4634 gfc_free_expr (initializer);
4637 c->initializer = initializer;
4640 if (gfc_match_eos () == MATCH_YES)
4642 if (gfc_match_char (',') != MATCH_YES)
4647 gfc_error ("Syntax error in procedure pointer component at %C");
4652 /* Match a PROCEDURE declaration inside an interface (R1206). */
4655 match_procedure_in_interface (void)
4659 char name[GFC_MAX_SYMBOL_LEN + 1];
4661 if (current_interface.type == INTERFACE_NAMELESS
4662 || current_interface.type == INTERFACE_ABSTRACT)
4664 gfc_error ("PROCEDURE at %C must be in a generic interface");
4670 m = gfc_match_name (name);
4673 else if (m == MATCH_ERROR)
4675 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4678 if (gfc_add_interface (sym) == FAILURE)
4681 if (gfc_match_eos () == MATCH_YES)
4683 if (gfc_match_char (',') != MATCH_YES)
4690 gfc_error ("Syntax error in PROCEDURE statement at %C");
4695 /* General matcher for PROCEDURE declarations. */
4697 static match match_procedure_in_type (void);
4700 gfc_match_procedure (void)
4704 switch (gfc_current_state ())
4709 case COMP_SUBROUTINE:
4711 m = match_procedure_decl ();
4713 case COMP_INTERFACE:
4714 m = match_procedure_in_interface ();
4717 m = match_ppc_decl ();
4719 case COMP_DERIVED_CONTAINS:
4720 m = match_procedure_in_type ();
4729 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4737 /* Warn if a matched procedure has the same name as an intrinsic; this is
4738 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4739 parser-state-stack to find out whether we're in a module. */
4742 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4746 in_module = (gfc_state_stack->previous
4747 && gfc_state_stack->previous->state == COMP_MODULE);
4749 gfc_warn_intrinsic_shadow (sym, in_module, func);
4753 /* Match a function declaration. */
4756 gfc_match_function_decl (void)
4758 char name[GFC_MAX_SYMBOL_LEN + 1];
4759 gfc_symbol *sym, *result;
4763 match found_match; /* Status returned by match func. */
4765 if (gfc_current_state () != COMP_NONE
4766 && gfc_current_state () != COMP_INTERFACE
4767 && gfc_current_state () != COMP_CONTAINS)
4770 gfc_clear_ts (¤t_ts);
4772 old_loc = gfc_current_locus;
4774 m = gfc_match_prefix (¤t_ts);
4777 gfc_current_locus = old_loc;
4781 if (gfc_match ("function% %n", name) != MATCH_YES)
4783 gfc_current_locus = old_loc;
4786 if (get_proc_name (name, &sym, false))
4789 if (add_hidden_procptr_result (sym) == SUCCESS)
4792 gfc_new_block = sym;
4794 m = gfc_match_formal_arglist (sym, 0, 0);
4797 gfc_error ("Expected formal argument list in function "
4798 "definition at %C");
4802 else if (m == MATCH_ERROR)
4807 /* According to the draft, the bind(c) and result clause can
4808 come in either order after the formal_arg_list (i.e., either
4809 can be first, both can exist together or by themselves or neither
4810 one). Therefore, the match_result can't match the end of the
4811 string, and check for the bind(c) or result clause in either order. */
4812 found_match = gfc_match_eos ();
4814 /* Make sure that it isn't already declared as BIND(C). If it is, it
4815 must have been marked BIND(C) with a BIND(C) attribute and that is
4816 not allowed for procedures. */
4817 if (sym->attr.is_bind_c == 1)
4819 sym->attr.is_bind_c = 0;
4820 if (sym->old_symbol != NULL)
4821 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4822 "variables or common blocks",
4823 &(sym->old_symbol->declared_at));
4825 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4826 "variables or common blocks", &gfc_current_locus);
4829 if (found_match != MATCH_YES)
4831 /* If we haven't found the end-of-statement, look for a suffix. */
4832 suffix_match = gfc_match_suffix (sym, &result);
4833 if (suffix_match == MATCH_YES)
4834 /* Need to get the eos now. */
4835 found_match = gfc_match_eos ();
4837 found_match = suffix_match;
4840 if(found_match != MATCH_YES)
4844 /* Make changes to the symbol. */
4847 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4850 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4851 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4854 /* Delay matching the function characteristics until after the
4855 specification block by signalling kind=-1. */
4856 sym->declared_at = old_loc;
4857 if (current_ts.type != BT_UNKNOWN)
4858 current_ts.kind = -1;
4860 current_ts.kind = 0;
4864 if (current_ts.type != BT_UNKNOWN
4865 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4871 if (current_ts.type != BT_UNKNOWN
4872 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4875 sym->result = result;
4878 /* Warn if this procedure has the same name as an intrinsic. */
4879 warn_intrinsic_shadow (sym, true);
4885 gfc_current_locus = old_loc;
4890 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4891 pass the name of the entry, rather than the gfc_current_block name, and
4892 to return false upon finding an existing global entry. */
4895 add_global_entry (const char *name, int sub)
4898 enum gfc_symbol_type type;
4900 s = gfc_get_gsymbol(name);
4901 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4904 || (s->type != GSYM_UNKNOWN
4905 && s->type != type))
4906 gfc_global_used(s, NULL);
4910 s->where = gfc_current_locus;
4912 s->ns = gfc_current_ns;
4919 /* Match an ENTRY statement. */
4922 gfc_match_entry (void)
4927 char name[GFC_MAX_SYMBOL_LEN + 1];
4928 gfc_compile_state state;
4932 bool module_procedure;
4936 m = gfc_match_name (name);
4940 state = gfc_current_state ();
4941 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4946 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4949 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4951 case COMP_BLOCK_DATA:
4952 gfc_error ("ENTRY statement at %C cannot appear within "
4955 case COMP_INTERFACE:
4956 gfc_error ("ENTRY statement at %C cannot appear within "
4960 gfc_error ("ENTRY statement at %C cannot appear within "
4961 "a DERIVED TYPE block");
4964 gfc_error ("ENTRY statement at %C cannot appear within "
4965 "an IF-THEN block");
4968 gfc_error ("ENTRY statement at %C cannot appear within "
4972 gfc_error ("ENTRY statement at %C cannot appear within "
4976 gfc_error ("ENTRY statement at %C cannot appear within "
4980 gfc_error ("ENTRY statement at %C cannot appear within "
4984 gfc_error ("ENTRY statement at %C cannot appear within "
4985 "a contained subprogram");
4988 gfc_internal_error ("gfc_match_entry(): Bad state");
4993 module_procedure = gfc_current_ns->parent != NULL
4994 && gfc_current_ns->parent->proc_name
4995 && gfc_current_ns->parent->proc_name->attr.flavor
4998 if (gfc_current_ns->parent != NULL
4999 && gfc_current_ns->parent->proc_name
5000 && !module_procedure)
5002 gfc_error("ENTRY statement at %C cannot appear in a "
5003 "contained procedure");
5007 /* Module function entries need special care in get_proc_name
5008 because previous references within the function will have
5009 created symbols attached to the current namespace. */
5010 if (get_proc_name (name, &entry,
5011 gfc_current_ns->parent != NULL
5012 && module_procedure))
5015 proc = gfc_current_block ();
5017 /* Make sure that it isn't already declared as BIND(C). If it is, it
5018 must have been marked BIND(C) with a BIND(C) attribute and that is
5019 not allowed for procedures. */
5020 if (entry->attr.is_bind_c == 1)
5022 entry->attr.is_bind_c = 0;
5023 if (entry->old_symbol != NULL)
5024 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5025 "variables or common blocks",
5026 &(entry->old_symbol->declared_at));
5028 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5029 "variables or common blocks", &gfc_current_locus);
5032 /* Check what next non-whitespace character is so we can tell if there
5033 is the required parens if we have a BIND(C). */
5034 gfc_gobble_whitespace ();
5035 peek_char = gfc_peek_ascii_char ();
5037 if (state == COMP_SUBROUTINE)
5039 /* An entry in a subroutine. */
5040 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
5043 m = gfc_match_formal_arglist (entry, 0, 1);
5047 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5048 never be an internal procedure. */
5049 is_bind_c = gfc_match_bind_c (entry, true);
5050 if (is_bind_c == MATCH_ERROR)
5052 if (is_bind_c == MATCH_YES)
5054 if (peek_char != '(')
5056 gfc_error ("Missing required parentheses before BIND(C) at %C");
5059 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
5064 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5065 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
5070 /* An entry in a function.
5071 We need to take special care because writing
5076 ENTRY f() RESULT (r)
5078 ENTRY f RESULT (r). */
5079 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
5082 old_loc = gfc_current_locus;
5083 if (gfc_match_eos () == MATCH_YES)
5085 gfc_current_locus = old_loc;
5086 /* Match the empty argument list, and add the interface to
5088 m = gfc_match_formal_arglist (entry, 0, 1);
5091 m = gfc_match_formal_arglist (entry, 0, 0);
5098 if (gfc_match_eos () == MATCH_YES)
5100 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5101 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5104 entry->result = entry;
5108 m = gfc_match_suffix (entry, &result);
5110 gfc_syntax_error (ST_ENTRY);
5116 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5117 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5118 || gfc_add_function (&entry->attr, result->name, NULL)
5121 entry->result = result;
5125 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5126 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5128 entry->result = entry;
5133 if (gfc_match_eos () != MATCH_YES)
5135 gfc_syntax_error (ST_ENTRY);
5139 entry->attr.recursive = proc->attr.recursive;
5140 entry->attr.elemental = proc->attr.elemental;
5141 entry->attr.pure = proc->attr.pure;
5143 el = gfc_get_entry_list ();
5145 el->next = gfc_current_ns->entries;
5146 gfc_current_ns->entries = el;
5148 el->id = el->next->id + 1;
5152 new_st.op = EXEC_ENTRY;
5153 new_st.ext.entry = el;
5159 /* Match a subroutine statement, including optional prefixes. */
5162 gfc_match_subroutine (void)
5164 char name[GFC_MAX_SYMBOL_LEN + 1];
5169 bool allow_binding_name;
5171 if (gfc_current_state () != COMP_NONE
5172 && gfc_current_state () != COMP_INTERFACE
5173 && gfc_current_state () != COMP_CONTAINS)
5176 m = gfc_match_prefix (NULL);
5180 m = gfc_match ("subroutine% %n", name);
5184 if (get_proc_name (name, &sym, false))
5187 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5188 the symbol existed before. */
5189 sym->declared_at = gfc_current_locus;
5191 if (add_hidden_procptr_result (sym) == SUCCESS)
5194 gfc_new_block = sym;
5196 /* Check what next non-whitespace character is so we can tell if there
5197 is the required parens if we have a BIND(C). */
5198 gfc_gobble_whitespace ();
5199 peek_char = gfc_peek_ascii_char ();
5201 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5204 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5207 /* Make sure that it isn't already declared as BIND(C). If it is, it
5208 must have been marked BIND(C) with a BIND(C) attribute and that is
5209 not allowed for procedures. */
5210 if (sym->attr.is_bind_c == 1)
5212 sym->attr.is_bind_c = 0;
5213 if (sym->old_symbol != NULL)
5214 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5215 "variables or common blocks",
5216 &(sym->old_symbol->declared_at));
5218 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5219 "variables or common blocks", &gfc_current_locus);
5222 /* C binding names are not allowed for internal procedures. */
5223 if (gfc_current_state () == COMP_CONTAINS
5224 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5225 allow_binding_name = false;
5227 allow_binding_name = true;
5229 /* Here, we are just checking if it has the bind(c) attribute, and if
5230 so, then we need to make sure it's all correct. If it doesn't,
5231 we still need to continue matching the rest of the subroutine line. */
5232 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5233 if (is_bind_c == MATCH_ERROR)
5235 /* There was an attempt at the bind(c), but it was wrong. An
5236 error message should have been printed w/in the gfc_match_bind_c
5237 so here we'll just return the MATCH_ERROR. */
5241 if (is_bind_c == MATCH_YES)
5243 /* The following is allowed in the Fortran 2008 draft. */
5244 if (gfc_current_state () == COMP_CONTAINS
5245 && sym->ns->proc_name->attr.flavor != FL_MODULE
5246 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5247 "at %L may not be specified for an internal "
5248 "procedure", &gfc_current_locus)
5252 if (peek_char != '(')
5254 gfc_error ("Missing required parentheses before BIND(C) at %C");
5257 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5262 if (gfc_match_eos () != MATCH_YES)
5264 gfc_syntax_error (ST_SUBROUTINE);
5268 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5271 /* Warn if it has the same name as an intrinsic. */
5272 warn_intrinsic_shadow (sym, false);
5278 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5279 given, and set the binding label in either the given symbol (if not
5280 NULL), or in the current_ts. The symbol may be NULL because we may
5281 encounter the BIND(C) before the declaration itself. Return
5282 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5283 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5284 or MATCH_YES if the specifier was correct and the binding label and
5285 bind(c) fields were set correctly for the given symbol or the
5286 current_ts. If allow_binding_name is false, no binding name may be
5290 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5292 /* binding label, if exists */
5293 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5297 /* Initialize the flag that specifies whether we encountered a NAME=
5298 specifier or not. */
5299 has_name_equals = 0;
5301 /* Init the first char to nil so we can catch if we don't have
5302 the label (name attr) or the symbol name yet. */
5303 binding_label[0] = '\0';
5305 /* This much we have to be able to match, in this order, if
5306 there is a bind(c) label. */
5307 if (gfc_match (" bind ( c ") != MATCH_YES)
5310 /* Now see if there is a binding label, or if we've reached the
5311 end of the bind(c) attribute without one. */
5312 if (gfc_match_char (',') == MATCH_YES)
5314 if (gfc_match (" name = ") != MATCH_YES)
5316 gfc_error ("Syntax error in NAME= specifier for binding label "
5318 /* should give an error message here */
5322 has_name_equals = 1;
5324 /* Get the opening quote. */
5325 double_quote = MATCH_YES;
5326 single_quote = MATCH_YES;
5327 double_quote = gfc_match_char ('"');
5328 if (double_quote != MATCH_YES)
5329 single_quote = gfc_match_char ('\'');
5330 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5332 gfc_error ("Syntax error in NAME= specifier for binding label "
5337 /* Grab the binding label, using functions that will not lower
5338 case the names automatically. */
5339 if (gfc_match_name_C (binding_label) != MATCH_YES)
5342 /* Get the closing quotation. */
5343 if (double_quote == MATCH_YES)
5345 if (gfc_match_char ('"') != MATCH_YES)
5347 gfc_error ("Missing closing quote '\"' for binding label at %C");
5348 /* User started string with '"' so looked to match it. */
5354 if (gfc_match_char ('\'') != MATCH_YES)
5356 gfc_error ("Missing closing quote '\'' for binding label at %C");
5357 /* User started string with "'" char. */
5363 /* Get the required right paren. */
5364 if (gfc_match_char (')') != MATCH_YES)
5366 gfc_error ("Missing closing paren for binding label at %C");
5370 if (has_name_equals && !allow_binding_name)
5372 gfc_error ("No binding name is allowed in BIND(C) at %C");
5376 if (has_name_equals && sym != NULL && sym->attr.dummy)
5378 gfc_error ("For dummy procedure %s, no binding name is "
5379 "allowed in BIND(C) at %C", sym->name);
5384 /* Save the binding label to the symbol. If sym is null, we're
5385 probably matching the typespec attributes of a declaration and
5386 haven't gotten the name yet, and therefore, no symbol yet. */
5387 if (binding_label[0] != '\0')
5391 strcpy (sym->binding_label, binding_label);
5394 strcpy (curr_binding_label, binding_label);
5396 else if (allow_binding_name)
5398 /* No binding label, but if symbol isn't null, we
5399 can set the label for it here.
5400 If name="" or allow_binding_name is false, no C binding name is
5402 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5403 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5406 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5407 && current_interface.type == INTERFACE_ABSTRACT)
5409 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5417 /* Return nonzero if we're currently compiling a contained procedure. */
5420 contained_procedure (void)
5422 gfc_state_data *s = gfc_state_stack;
5424 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5425 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5431 /* Set the kind of each enumerator. The kind is selected such that it is
5432 interoperable with the corresponding C enumeration type, making
5433 sure that -fshort-enums is honored. */
5438 enumerator_history *current_history = NULL;
5442 if (max_enum == NULL || enum_history == NULL)
5445 if (!flag_short_enums)
5451 kind = gfc_integer_kinds[i++].kind;
5453 while (kind < gfc_c_int_kind
5454 && gfc_check_integer_range (max_enum->initializer->value.integer,
5457 current_history = enum_history;
5458 while (current_history != NULL)
5460 current_history->sym->ts.kind = kind;
5461 current_history = current_history->next;
5466 /* Match any of the various end-block statements. Returns the type of
5467 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5468 and END BLOCK statements cannot be replaced by a single END statement. */
5471 gfc_match_end (gfc_statement *st)
5473 char name[GFC_MAX_SYMBOL_LEN + 1];
5474 gfc_compile_state state;
5476 const char *block_name;
5481 old_loc = gfc_current_locus;
5482 if (gfc_match ("end") != MATCH_YES)
5485 state = gfc_current_state ();
5486 block_name = gfc_current_block () == NULL
5487 ? NULL : gfc_current_block ()->name;
5489 if (state == COMP_BLOCK && !strcmp (block_name, "block@"))
5492 if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS)
5494 state = gfc_state_stack->previous->state;
5495 block_name = gfc_state_stack->previous->sym == NULL
5496 ? NULL : gfc_state_stack->previous->sym->name;
5503 *st = ST_END_PROGRAM;
5504 target = " program";
5508 case COMP_SUBROUTINE:
5509 *st = ST_END_SUBROUTINE;
5510 target = " subroutine";
5511 eos_ok = !contained_procedure ();
5515 *st = ST_END_FUNCTION;
5516 target = " function";
5517 eos_ok = !contained_procedure ();
5520 case COMP_BLOCK_DATA:
5521 *st = ST_END_BLOCK_DATA;
5522 target = " block data";
5527 *st = ST_END_MODULE;
5532 case COMP_INTERFACE:
5533 *st = ST_END_INTERFACE;
5534 target = " interface";
5539 case COMP_DERIVED_CONTAINS:
5564 *st = ST_END_CRITICAL;
5565 target = " critical";
5570 case COMP_SELECT_TYPE:
5571 *st = ST_END_SELECT;
5577 *st = ST_END_FORALL;
5592 last_initializer = NULL;
5594 gfc_free_enum_history ();
5598 gfc_error ("Unexpected END statement at %C");
5602 if (gfc_match_eos () == MATCH_YES)
5606 /* We would have required END [something]. */
5607 gfc_error ("%s statement expected at %L",
5608 gfc_ascii_statement (*st), &old_loc);
5615 /* Verify that we've got the sort of end-block that we're expecting. */
5616 if (gfc_match (target) != MATCH_YES)
5618 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5622 /* If we're at the end, make sure a block name wasn't required. */
5623 if (gfc_match_eos () == MATCH_YES)
5626 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5627 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK
5628 && *st != ST_END_CRITICAL)
5634 gfc_error ("Expected block name of '%s' in %s statement at %C",
5635 block_name, gfc_ascii_statement (*st));
5640 /* END INTERFACE has a special handler for its several possible endings. */
5641 if (*st == ST_END_INTERFACE)
5642 return gfc_match_end_interface ();
5644 /* We haven't hit the end of statement, so what is left must be an
5646 m = gfc_match_space ();
5648 m = gfc_match_name (name);
5651 gfc_error ("Expected terminating name at %C");
5655 if (block_name == NULL)
5658 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5660 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5661 gfc_ascii_statement (*st));
5664 /* Procedure pointer as function result. */
5665 else if (strcmp (block_name, "ppr@") == 0
5666 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5668 gfc_error ("Expected label '%s' for %s statement at %C",
5669 gfc_current_block ()->ns->proc_name->name,
5670 gfc_ascii_statement (*st));
5674 if (gfc_match_eos () == MATCH_YES)
5678 gfc_syntax_error (*st);
5681 gfc_current_locus = old_loc;
5687 /***************** Attribute declaration statements ****************/
5689 /* Set the attribute of a single variable. */
5694 char name[GFC_MAX_SYMBOL_LEN + 1];
5702 m = gfc_match_name (name);
5706 if (find_special (name, &sym, false))
5709 var_locus = gfc_current_locus;
5711 /* Deal with possible array specification for certain attributes. */
5712 if (current_attr.dimension
5713 || current_attr.codimension
5714 || current_attr.allocatable
5715 || current_attr.pointer
5716 || current_attr.target)
5718 m = gfc_match_array_spec (&as, !current_attr.codimension,
5719 !current_attr.dimension
5720 && !current_attr.pointer
5721 && !current_attr.target);
5722 if (m == MATCH_ERROR)
5725 if (current_attr.dimension && m == MATCH_NO)
5727 gfc_error ("Missing array specification at %L in DIMENSION "
5728 "statement", &var_locus);
5733 if (current_attr.dimension && sym->value)
5735 gfc_error ("Dimensions specified for %s at %L after its "
5736 "initialisation", sym->name, &var_locus);
5741 if (current_attr.codimension && m == MATCH_NO)
5743 gfc_error ("Missing array specification at %L in CODIMENSION "
5744 "statement", &var_locus);
5749 if ((current_attr.allocatable || current_attr.pointer)
5750 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5752 gfc_error ("Array specification must be deferred at %L", &var_locus);
5758 /* Update symbol table. DIMENSION attribute is set in
5759 gfc_set_array_spec(). For CLASS variables, this must be applied
5760 to the first component, or '$data' field. */
5761 if (sym->ts.type == BT_CLASS && sym->ts.u.derived)
5763 gfc_component *comp;
5764 comp = gfc_find_component (sym->ts.u.derived, "$data", true, true);
5765 if (comp == NULL || gfc_copy_attr (&comp->attr, ¤t_attr,
5766 &var_locus) == FAILURE)
5771 sym->attr.class_ok = (sym->attr.class_ok
5772 || current_attr.allocatable
5773 || current_attr.pointer);
5777 if (current_attr.dimension == 0 && current_attr.codimension == 0
5778 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5785 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5791 if (sym->attr.cray_pointee && sym->as != NULL)
5793 /* Fix the array spec. */
5794 m = gfc_mod_pointee_as (sym->as);
5795 if (m == MATCH_ERROR)
5799 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5805 if ((current_attr.external || current_attr.intrinsic)
5806 && sym->attr.flavor != FL_PROCEDURE
5807 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5813 add_hidden_procptr_result (sym);
5818 gfc_free_array_spec (as);
5823 /* Generic attribute declaration subroutine. Used for attributes that
5824 just have a list of names. */
5831 /* Gobble the optional double colon, by simply ignoring the result
5841 if (gfc_match_eos () == MATCH_YES)
5847 if (gfc_match_char (',') != MATCH_YES)
5849 gfc_error ("Unexpected character in variable list at %C");
5859 /* This routine matches Cray Pointer declarations of the form:
5860 pointer ( <pointer>, <pointee> )
5862 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5863 The pointer, if already declared, should be an integer. Otherwise, we
5864 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5865 be either a scalar, or an array declaration. No space is allocated for
5866 the pointee. For the statement
5867 pointer (ipt, ar(10))
5868 any subsequent uses of ar will be translated (in C-notation) as
5869 ar(i) => ((<type> *) ipt)(i)
5870 After gimplification, pointee variable will disappear in the code. */
5873 cray_pointer_decl (void)
5876 gfc_array_spec *as = NULL;
5877 gfc_symbol *cptr; /* Pointer symbol. */
5878 gfc_symbol *cpte; /* Pointee symbol. */
5884 if (gfc_match_char ('(') != MATCH_YES)
5886 gfc_error ("Expected '(' at %C");
5890 /* Match pointer. */
5891 var_locus = gfc_current_locus;
5892 gfc_clear_attr (¤t_attr);
5893 gfc_add_cray_pointer (¤t_attr, &var_locus);
5894 current_ts.type = BT_INTEGER;
5895 current_ts.kind = gfc_index_integer_kind;
5897 m = gfc_match_symbol (&cptr, 0);
5900 gfc_error ("Expected variable name at %C");
5904 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5907 gfc_set_sym_referenced (cptr);
5909 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5911 cptr->ts.type = BT_INTEGER;
5912 cptr->ts.kind = gfc_index_integer_kind;
5914 else if (cptr->ts.type != BT_INTEGER)
5916 gfc_error ("Cray pointer at %C must be an integer");
5919 else if (cptr->ts.kind < gfc_index_integer_kind)
5920 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5921 " memory addresses require %d bytes",
5922 cptr->ts.kind, gfc_index_integer_kind);
5924 if (gfc_match_char (',') != MATCH_YES)
5926 gfc_error ("Expected \",\" at %C");
5930 /* Match Pointee. */
5931 var_locus = gfc_current_locus;
5932 gfc_clear_attr (¤t_attr);
5933 gfc_add_cray_pointee (¤t_attr, &var_locus);
5934 current_ts.type = BT_UNKNOWN;
5935 current_ts.kind = 0;
5937 m = gfc_match_symbol (&cpte, 0);
5940 gfc_error ("Expected variable name at %C");
5944 /* Check for an optional array spec. */
5945 m = gfc_match_array_spec (&as, true, false);
5946 if (m == MATCH_ERROR)
5948 gfc_free_array_spec (as);
5951 else if (m == MATCH_NO)
5953 gfc_free_array_spec (as);
5957 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5960 gfc_set_sym_referenced (cpte);
5962 if (cpte->as == NULL)
5964 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5965 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5967 else if (as != NULL)
5969 gfc_error ("Duplicate array spec for Cray pointee at %C");
5970 gfc_free_array_spec (as);
5976 if (cpte->as != NULL)
5978 /* Fix array spec. */
5979 m = gfc_mod_pointee_as (cpte->as);
5980 if (m == MATCH_ERROR)
5984 /* Point the Pointee at the Pointer. */
5985 cpte->cp_pointer = cptr;
5987 if (gfc_match_char (')') != MATCH_YES)
5989 gfc_error ("Expected \")\" at %C");
5992 m = gfc_match_char (',');
5994 done = true; /* Stop searching for more declarations. */
5998 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
5999 || gfc_match_eos () != MATCH_YES)
6001 gfc_error ("Expected \",\" or end of statement at %C");
6009 gfc_match_external (void)
6012 gfc_clear_attr (¤t_attr);
6013 current_attr.external = 1;
6015 return attr_decl ();
6020 gfc_match_intent (void)
6024 /* This is not allowed within a BLOCK construct! */
6025 if (gfc_current_state () == COMP_BLOCK)
6027 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6031 intent = match_intent_spec ();
6032 if (intent == INTENT_UNKNOWN)
6035 gfc_clear_attr (¤t_attr);
6036 current_attr.intent = intent;
6038 return attr_decl ();
6043 gfc_match_intrinsic (void)
6046 gfc_clear_attr (¤t_attr);
6047 current_attr.intrinsic = 1;
6049 return attr_decl ();
6054 gfc_match_optional (void)
6056 /* This is not allowed within a BLOCK construct! */
6057 if (gfc_current_state () == COMP_BLOCK)
6059 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6063 gfc_clear_attr (¤t_attr);
6064 current_attr.optional = 1;
6066 return attr_decl ();
6071 gfc_match_pointer (void)
6073 gfc_gobble_whitespace ();
6074 if (gfc_peek_ascii_char () == '(')
6076 if (!gfc_option.flag_cray_pointer)
6078 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6082 return cray_pointer_decl ();
6086 gfc_clear_attr (¤t_attr);
6087 current_attr.pointer = 1;
6089 return attr_decl ();
6095 gfc_match_allocatable (void)
6097 gfc_clear_attr (¤t_attr);
6098 current_attr.allocatable = 1;
6100 return attr_decl ();
6105 gfc_match_codimension (void)
6107 gfc_clear_attr (¤t_attr);
6108 current_attr.codimension = 1;
6110 return attr_decl ();
6115 gfc_match_dimension (void)
6117 gfc_clear_attr (¤t_attr);
6118 current_attr.dimension = 1;
6120 return attr_decl ();
6125 gfc_match_target (void)
6127 gfc_clear_attr (¤t_attr);
6128 current_attr.target = 1;
6130 return attr_decl ();
6134 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6138 access_attr_decl (gfc_statement st)
6140 char name[GFC_MAX_SYMBOL_LEN + 1];
6141 interface_type type;
6144 gfc_intrinsic_op op;
6147 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6152 m = gfc_match_generic_spec (&type, name, &op);
6155 if (m == MATCH_ERROR)
6160 case INTERFACE_NAMELESS:
6161 case INTERFACE_ABSTRACT:
6164 case INTERFACE_GENERIC:
6165 if (gfc_get_symbol (name, NULL, &sym))
6168 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6169 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6170 sym->name, NULL) == FAILURE)
6175 case INTERFACE_INTRINSIC_OP:
6176 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6178 gfc_current_ns->operator_access[op] =
6179 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6183 gfc_error ("Access specification of the %s operator at %C has "
6184 "already been specified", gfc_op2string (op));
6190 case INTERFACE_USER_OP:
6191 uop = gfc_get_uop (name);
6193 if (uop->access == ACCESS_UNKNOWN)
6195 uop->access = (st == ST_PUBLIC)
6196 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6200 gfc_error ("Access specification of the .%s. operator at %C "
6201 "has already been specified", sym->name);
6208 if (gfc_match_char (',') == MATCH_NO)
6212 if (gfc_match_eos () != MATCH_YES)
6217 gfc_syntax_error (st);
6225 gfc_match_protected (void)
6230 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6232 gfc_error ("PROTECTED at %C only allowed in specification "
6233 "part of a module");
6238 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6242 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6247 if (gfc_match_eos () == MATCH_YES)
6252 m = gfc_match_symbol (&sym, 0);
6256 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6269 if (gfc_match_eos () == MATCH_YES)
6271 if (gfc_match_char (',') != MATCH_YES)
6278 gfc_error ("Syntax error in PROTECTED statement at %C");
6283 /* The PRIVATE statement is a bit weird in that it can be an attribute
6284 declaration, but also works as a standalone statement inside of a
6285 type declaration or a module. */
6288 gfc_match_private (gfc_statement *st)
6291 if (gfc_match ("private") != MATCH_YES)
6294 if (gfc_current_state () != COMP_MODULE
6295 && !(gfc_current_state () == COMP_DERIVED
6296 && gfc_state_stack->previous
6297 && gfc_state_stack->previous->state == COMP_MODULE)
6298 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6299 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6300 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6302 gfc_error ("PRIVATE statement at %C is only allowed in the "
6303 "specification part of a module");
6307 if (gfc_current_state () == COMP_DERIVED)
6309 if (gfc_match_eos () == MATCH_YES)
6315 gfc_syntax_error (ST_PRIVATE);
6319 if (gfc_match_eos () == MATCH_YES)
6326 return access_attr_decl (ST_PRIVATE);
6331 gfc_match_public (gfc_statement *st)
6334 if (gfc_match ("public") != MATCH_YES)
6337 if (gfc_current_state () != COMP_MODULE)
6339 gfc_error ("PUBLIC statement at %C is only allowed in the "
6340 "specification part of a module");
6344 if (gfc_match_eos () == MATCH_YES)
6351 return access_attr_decl (ST_PUBLIC);
6355 /* Workhorse for gfc_match_parameter. */
6365 m = gfc_match_symbol (&sym, 0);
6367 gfc_error ("Expected variable name at %C in PARAMETER statement");
6372 if (gfc_match_char ('=') == MATCH_NO)
6374 gfc_error ("Expected = sign in PARAMETER statement at %C");
6378 m = gfc_match_init_expr (&init);
6380 gfc_error ("Expected expression at %C in PARAMETER statement");
6384 if (sym->ts.type == BT_UNKNOWN
6385 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6391 if (gfc_check_assign_symbol (sym, init) == FAILURE
6392 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6400 gfc_error ("Initializing already initialized variable at %C");
6405 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6406 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6409 gfc_free_expr (init);
6414 /* Match a parameter statement, with the weird syntax that these have. */
6417 gfc_match_parameter (void)
6421 if (gfc_match_char ('(') == MATCH_NO)
6430 if (gfc_match (" )%t") == MATCH_YES)
6433 if (gfc_match_char (',') != MATCH_YES)
6435 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6445 /* Save statements have a special syntax. */
6448 gfc_match_save (void)
6450 char n[GFC_MAX_SYMBOL_LEN+1];
6455 if (gfc_match_eos () == MATCH_YES)
6457 if (gfc_current_ns->seen_save)
6459 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6460 "follows previous SAVE statement")
6465 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6469 if (gfc_current_ns->save_all)
6471 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6472 "blanket SAVE statement")
6481 m = gfc_match_symbol (&sym, 0);
6485 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6497 m = gfc_match (" / %n /", &n);
6498 if (m == MATCH_ERROR)
6503 c = gfc_get_common (n, 0);
6506 gfc_current_ns->seen_save = 1;
6509 if (gfc_match_eos () == MATCH_YES)
6511 if (gfc_match_char (',') != MATCH_YES)
6518 gfc_error ("Syntax error in SAVE statement at %C");
6524 gfc_match_value (void)
6529 /* This is not allowed within a BLOCK construct! */
6530 if (gfc_current_state () == COMP_BLOCK)
6532 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6536 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6540 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6545 if (gfc_match_eos () == MATCH_YES)
6550 m = gfc_match_symbol (&sym, 0);
6554 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6567 if (gfc_match_eos () == MATCH_YES)
6569 if (gfc_match_char (',') != MATCH_YES)
6576 gfc_error ("Syntax error in VALUE statement at %C");
6582 gfc_match_volatile (void)
6587 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6591 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6596 if (gfc_match_eos () == MATCH_YES)
6601 /* VOLATILE is special because it can be added to host-associated
6602 symbols locally. Except for coarrays. */
6603 m = gfc_match_symbol (&sym, 1);
6607 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
6608 for variable in a BLOCK which is defined outside of the BLOCK. */
6609 if (sym->ns != gfc_current_ns && sym->attr.codimension)
6611 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
6612 "%C, which is use-/host-associated", sym->name);
6615 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6628 if (gfc_match_eos () == MATCH_YES)
6630 if (gfc_match_char (',') != MATCH_YES)
6637 gfc_error ("Syntax error in VOLATILE statement at %C");
6643 gfc_match_asynchronous (void)
6648 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C")
6652 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6657 if (gfc_match_eos () == MATCH_YES)
6662 /* ASYNCHRONOUS is special because it can be added to host-associated
6664 m = gfc_match_symbol (&sym, 1);
6668 if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)
6681 if (gfc_match_eos () == MATCH_YES)
6683 if (gfc_match_char (',') != MATCH_YES)
6690 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6695 /* Match a module procedure statement. Note that we have to modify
6696 symbols in the parent's namespace because the current one was there
6697 to receive symbols that are in an interface's formal argument list. */
6700 gfc_match_modproc (void)
6702 char name[GFC_MAX_SYMBOL_LEN + 1];
6705 gfc_namespace *module_ns;
6706 gfc_interface *old_interface_head, *interface;
6708 if (gfc_state_stack->state != COMP_INTERFACE
6709 || gfc_state_stack->previous == NULL
6710 || current_interface.type == INTERFACE_NAMELESS
6711 || current_interface.type == INTERFACE_ABSTRACT)
6713 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6718 module_ns = gfc_current_ns->parent;
6719 for (; module_ns; module_ns = module_ns->parent)
6720 if (module_ns->proc_name->attr.flavor == FL_MODULE
6721 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6722 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6723 && !module_ns->proc_name->attr.contained))
6726 if (module_ns == NULL)
6729 /* Store the current state of the interface. We will need it if we
6730 end up with a syntax error and need to recover. */
6731 old_interface_head = gfc_current_interface_head ();
6735 locus old_locus = gfc_current_locus;
6738 m = gfc_match_name (name);
6744 /* Check for syntax error before starting to add symbols to the
6745 current namespace. */
6746 if (gfc_match_eos () == MATCH_YES)
6748 if (!last && gfc_match_char (',') != MATCH_YES)
6751 /* Now we're sure the syntax is valid, we process this item
6753 if (gfc_get_symbol (name, module_ns, &sym))
6756 if (sym->attr.intrinsic)
6758 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6759 "PROCEDURE", &old_locus);
6763 if (sym->attr.proc != PROC_MODULE
6764 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6765 sym->name, NULL) == FAILURE)
6768 if (gfc_add_interface (sym) == FAILURE)
6771 sym->attr.mod_proc = 1;
6772 sym->declared_at = old_locus;
6781 /* Restore the previous state of the interface. */
6782 interface = gfc_current_interface_head ();
6783 gfc_set_current_interface_head (old_interface_head);
6785 /* Free the new interfaces. */
6786 while (interface != old_interface_head)
6788 gfc_interface *i = interface->next;
6789 gfc_free (interface);
6793 /* And issue a syntax error. */
6794 gfc_syntax_error (ST_MODULE_PROC);
6799 /* Check a derived type that is being extended. */
6801 check_extended_derived_type (char *name)
6803 gfc_symbol *extended;
6805 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6807 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6813 gfc_error ("No such symbol in TYPE definition at %C");
6817 if (extended->attr.flavor != FL_DERIVED)
6819 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6820 "derived type", name);
6824 if (extended->attr.is_bind_c)
6826 gfc_error ("'%s' cannot be extended at %C because it "
6827 "is BIND(C)", extended->name);
6831 if (extended->attr.sequence)
6833 gfc_error ("'%s' cannot be extended at %C because it "
6834 "is a SEQUENCE type", extended->name);
6842 /* Match the optional attribute specifiers for a type declaration.
6843 Return MATCH_ERROR if an error is encountered in one of the handled
6844 attributes (public, private, bind(c)), MATCH_NO if what's found is
6845 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6846 checking on attribute conflicts needs to be done. */
6849 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6851 /* See if the derived type is marked as private. */
6852 if (gfc_match (" , private") == MATCH_YES)
6854 if (gfc_current_state () != COMP_MODULE)
6856 gfc_error ("Derived type at %C can only be PRIVATE in the "
6857 "specification part of a module");
6861 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6864 else if (gfc_match (" , public") == MATCH_YES)
6866 if (gfc_current_state () != COMP_MODULE)
6868 gfc_error ("Derived type at %C can only be PUBLIC in the "
6869 "specification part of a module");
6873 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6876 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6878 /* If the type is defined to be bind(c) it then needs to make
6879 sure that all fields are interoperable. This will
6880 need to be a semantic check on the finished derived type.
6881 See 15.2.3 (lines 9-12) of F2003 draft. */
6882 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6885 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6887 else if (gfc_match (" , abstract") == MATCH_YES)
6889 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6893 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6896 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6898 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6904 /* If we get here, something matched. */
6909 /* Assign a hash value for a derived type. The algorithm is that of
6910 SDBM. The hashed string is '[module_name #] derived_name'. */
6912 hash_value (gfc_symbol *sym)
6914 unsigned int hash = 0;
6918 /* Hash of the module or procedure name. */
6919 if (sym->module != NULL)
6921 else if (sym->ns && sym->ns->proc_name
6922 && sym->ns->proc_name->attr.flavor == FL_MODULE)
6923 c = sym->ns->proc_name->name;
6930 for (i = 0; i < len; i++, c++)
6931 hash = (hash << 6) + (hash << 16) - hash + (*c);
6933 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
6934 hash = (hash << 6) + (hash << 16) - hash + '#';
6937 /* Hash of the derived type name. */
6938 len = strlen (sym->name);
6940 for (i = 0; i < len; i++, c++)
6941 hash = (hash << 6) + (hash << 16) - hash + (*c);
6943 /* Return the hash but take the modulus for the sake of module read,
6944 even though this slightly increases the chance of collision. */
6945 return (hash % 100000000);
6949 /* Match the beginning of a derived type declaration. If a type name
6950 was the result of a function, then it is possible to have a symbol
6951 already to be known as a derived type yet have no components. */
6954 gfc_match_derived_decl (void)
6956 char name[GFC_MAX_SYMBOL_LEN + 1];
6957 char parent[GFC_MAX_SYMBOL_LEN + 1];
6958 symbol_attribute attr;
6960 gfc_symbol *extended;
6962 match is_type_attr_spec = MATCH_NO;
6963 bool seen_attr = false;
6965 if (gfc_current_state () == COMP_DERIVED)
6970 gfc_clear_attr (&attr);
6975 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6976 if (is_type_attr_spec == MATCH_ERROR)
6978 if (is_type_attr_spec == MATCH_YES)
6980 } while (is_type_attr_spec == MATCH_YES);
6982 /* Deal with derived type extensions. The extension attribute has
6983 been added to 'attr' but now the parent type must be found and
6986 extended = check_extended_derived_type (parent);
6988 if (parent[0] && !extended)
6991 if (gfc_match (" ::") != MATCH_YES && seen_attr)
6993 gfc_error ("Expected :: in TYPE definition at %C");
6997 m = gfc_match (" %n%t", name);
7001 /* Make sure the name is not the name of an intrinsic type. */
7002 if (gfc_is_intrinsic_typename (name))
7004 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7009 if (gfc_get_symbol (name, NULL, &sym))
7012 if (sym->ts.type != BT_UNKNOWN)
7014 gfc_error ("Derived type name '%s' at %C already has a basic type "
7015 "of %s", sym->name, gfc_typename (&sym->ts));
7019 /* The symbol may already have the derived attribute without the
7020 components. The ways this can happen is via a function
7021 definition, an INTRINSIC statement or a subtype in another
7022 derived type that is a pointer. The first part of the AND clause
7023 is true if the symbol is not the return value of a function. */
7024 if (sym->attr.flavor != FL_DERIVED
7025 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
7028 if (sym->components != NULL || sym->attr.zero_comp)
7030 gfc_error ("Derived type definition of '%s' at %C has already been "
7031 "defined", sym->name);
7035 if (attr.access != ACCESS_UNKNOWN
7036 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
7039 /* See if the derived type was labeled as bind(c). */
7040 if (attr.is_bind_c != 0)
7041 sym->attr.is_bind_c = attr.is_bind_c;
7043 /* Construct the f2k_derived namespace if it is not yet there. */
7044 if (!sym->f2k_derived)
7045 sym->f2k_derived = gfc_get_namespace (NULL, 0);
7047 if (extended && !sym->components)
7052 /* Add the extended derived type as the first component. */
7053 gfc_add_component (sym, parent, &p);
7055 gfc_set_sym_referenced (extended);
7057 p->ts.type = BT_DERIVED;
7058 p->ts.u.derived = extended;
7059 p->initializer = gfc_default_initializer (&p->ts);
7061 /* Set extension level. */
7062 if (extended->attr.extension == 255)
7064 /* Since the extension field is 8 bit wide, we can only have
7065 up to 255 extension levels. */
7066 gfc_error ("Maximum extension level reached with type '%s' at %L",
7067 extended->name, &extended->declared_at);
7070 sym->attr.extension = extended->attr.extension + 1;
7072 /* Provide the links between the extended type and its extension. */
7073 if (!extended->f2k_derived)
7074 extended->f2k_derived = gfc_get_namespace (NULL, 0);
7075 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
7079 if (!sym->hash_value)
7080 /* Set the hash for the compound name for this type. */
7081 sym->hash_value = hash_value (sym);
7083 /* Take over the ABSTRACT attribute. */
7084 sym->attr.abstract = attr.abstract;
7086 gfc_new_block = sym;
7092 /* Cray Pointees can be declared as:
7093 pointer (ipt, a (n,m,...,*)) */
7096 gfc_mod_pointee_as (gfc_array_spec *as)
7098 as->cray_pointee = true; /* This will be useful to know later. */
7099 if (as->type == AS_ASSUMED_SIZE)
7100 as->cp_was_assumed = true;
7101 else if (as->type == AS_ASSUMED_SHAPE)
7103 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7110 /* Match the enum definition statement, here we are trying to match
7111 the first line of enum definition statement.
7112 Returns MATCH_YES if match is found. */
7115 gfc_match_enum (void)
7119 m = gfc_match_eos ();
7123 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
7131 /* Returns an initializer whose value is one higher than the value of the
7132 LAST_INITIALIZER argument. If the argument is NULL, the
7133 initializers value will be set to zero. The initializer's kind
7134 will be set to gfc_c_int_kind.
7136 If -fshort-enums is given, the appropriate kind will be selected
7137 later after all enumerators have been parsed. A warning is issued
7138 here if an initializer exceeds gfc_c_int_kind. */
7141 enum_initializer (gfc_expr *last_initializer, locus where)
7144 result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where);
7146 mpz_init (result->value.integer);
7148 if (last_initializer != NULL)
7150 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
7151 result->where = last_initializer->where;
7153 if (gfc_check_integer_range (result->value.integer,
7154 gfc_c_int_kind) != ARITH_OK)
7156 gfc_error ("Enumerator exceeds the C integer type at %C");
7162 /* Control comes here, if it's the very first enumerator and no
7163 initializer has been given. It will be initialized to zero. */
7164 mpz_set_si (result->value.integer, 0);
7171 /* Match a variable name with an optional initializer. When this
7172 subroutine is called, a variable is expected to be parsed next.
7173 Depending on what is happening at the moment, updates either the
7174 symbol table or the current interface. */
7177 enumerator_decl (void)
7179 char name[GFC_MAX_SYMBOL_LEN + 1];
7180 gfc_expr *initializer;
7181 gfc_array_spec *as = NULL;
7189 old_locus = gfc_current_locus;
7191 /* When we get here, we've just matched a list of attributes and
7192 maybe a type and a double colon. The next thing we expect to see
7193 is the name of the symbol. */
7194 m = gfc_match_name (name);
7198 var_locus = gfc_current_locus;
7200 /* OK, we've successfully matched the declaration. Now put the
7201 symbol in the current namespace. If we fail to create the symbol,
7203 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7209 /* The double colon must be present in order to have initializers.
7210 Otherwise the statement is ambiguous with an assignment statement. */
7213 if (gfc_match_char ('=') == MATCH_YES)
7215 m = gfc_match_init_expr (&initializer);
7218 gfc_error ("Expected an initialization expression at %C");
7227 /* If we do not have an initializer, the initialization value of the
7228 previous enumerator (stored in last_initializer) is incremented
7229 by 1 and is used to initialize the current enumerator. */
7230 if (initializer == NULL)
7231 initializer = enum_initializer (last_initializer, old_locus);
7233 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7235 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7241 /* Store this current initializer, for the next enumerator variable
7242 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7243 use last_initializer below. */
7244 last_initializer = initializer;
7245 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7247 /* Maintain enumerator history. */
7248 gfc_find_symbol (name, NULL, 0, &sym);
7249 create_enum_history (sym, last_initializer);
7251 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7254 /* Free stuff up and return. */
7255 gfc_free_expr (initializer);
7261 /* Match the enumerator definition statement. */
7264 gfc_match_enumerator_def (void)
7269 gfc_clear_ts (¤t_ts);
7271 m = gfc_match (" enumerator");
7275 m = gfc_match (" :: ");
7276 if (m == MATCH_ERROR)
7279 colon_seen = (m == MATCH_YES);
7281 if (gfc_current_state () != COMP_ENUM)
7283 gfc_error ("ENUM definition statement expected before %C");
7284 gfc_free_enum_history ();
7288 (¤t_ts)->type = BT_INTEGER;
7289 (¤t_ts)->kind = gfc_c_int_kind;
7291 gfc_clear_attr (¤t_attr);
7292 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7301 m = enumerator_decl ();
7302 if (m == MATCH_ERROR)
7304 gfc_free_enum_history ();
7310 if (gfc_match_eos () == MATCH_YES)
7312 if (gfc_match_char (',') != MATCH_YES)
7316 if (gfc_current_state () == COMP_ENUM)
7318 gfc_free_enum_history ();
7319 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7324 gfc_free_array_spec (current_as);
7331 /* Match binding attributes. */
7334 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7336 bool found_passing = false;
7337 bool seen_ptr = false;
7338 match m = MATCH_YES;
7340 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7341 this case the defaults are in there. */
7342 ba->access = ACCESS_UNKNOWN;
7343 ba->pass_arg = NULL;
7344 ba->pass_arg_num = 0;
7346 ba->non_overridable = 0;
7350 /* If we find a comma, we believe there are binding attributes. */
7351 m = gfc_match_char (',');
7357 /* Access specifier. */
7359 m = gfc_match (" public");
7360 if (m == MATCH_ERROR)
7364 if (ba->access != ACCESS_UNKNOWN)
7366 gfc_error ("Duplicate access-specifier at %C");
7370 ba->access = ACCESS_PUBLIC;
7374 m = gfc_match (" private");
7375 if (m == MATCH_ERROR)
7379 if (ba->access != ACCESS_UNKNOWN)
7381 gfc_error ("Duplicate access-specifier at %C");
7385 ba->access = ACCESS_PRIVATE;
7389 /* If inside GENERIC, the following is not allowed. */
7394 m = gfc_match (" nopass");
7395 if (m == MATCH_ERROR)
7401 gfc_error ("Binding attributes already specify passing,"
7402 " illegal NOPASS at %C");
7406 found_passing = true;
7411 /* PASS possibly including argument. */
7412 m = gfc_match (" pass");
7413 if (m == MATCH_ERROR)
7417 char arg[GFC_MAX_SYMBOL_LEN + 1];
7421 gfc_error ("Binding attributes already specify passing,"
7422 " illegal PASS at %C");
7426 m = gfc_match (" ( %n )", arg);
7427 if (m == MATCH_ERROR)
7430 ba->pass_arg = gfc_get_string (arg);
7431 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7433 found_passing = true;
7441 m = gfc_match (" pointer");
7442 if (m == MATCH_ERROR)
7448 gfc_error ("Duplicate POINTER attribute at %C");
7458 /* NON_OVERRIDABLE flag. */
7459 m = gfc_match (" non_overridable");
7460 if (m == MATCH_ERROR)
7464 if (ba->non_overridable)
7466 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7470 ba->non_overridable = 1;
7474 /* DEFERRED flag. */
7475 m = gfc_match (" deferred");
7476 if (m == MATCH_ERROR)
7482 gfc_error ("Duplicate DEFERRED at %C");
7493 /* Nothing matching found. */
7495 gfc_error ("Expected access-specifier at %C");
7497 gfc_error ("Expected binding attribute at %C");
7500 while (gfc_match_char (',') == MATCH_YES);
7502 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7503 if (ba->non_overridable && ba->deferred)
7505 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7512 if (ba->access == ACCESS_UNKNOWN)
7513 ba->access = gfc_typebound_default_access;
7515 if (ppc && !seen_ptr)
7517 gfc_error ("POINTER attribute is required for procedure pointer component"
7529 /* Match a PROCEDURE specific binding inside a derived type. */
7532 match_procedure_in_type (void)
7534 char name[GFC_MAX_SYMBOL_LEN + 1];
7535 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7536 char* target = NULL;
7537 gfc_typebound_proc* tb;
7545 /* Check current state. */
7546 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7547 block = gfc_state_stack->previous->sym;
7550 /* Try to match PROCEDURE(interface). */
7551 if (gfc_match (" (") == MATCH_YES)
7553 m = gfc_match_name (target_buf);
7554 if (m == MATCH_ERROR)
7558 gfc_error ("Interface-name expected after '(' at %C");
7562 if (gfc_match (" )") != MATCH_YES)
7564 gfc_error ("')' expected at %C");
7568 target = target_buf;
7571 /* Construct the data structure. */
7572 tb = gfc_get_typebound_proc ();
7573 tb->where = gfc_current_locus;
7576 /* Match binding attributes. */
7577 m = match_binding_attributes (tb, false, false);
7578 if (m == MATCH_ERROR)
7580 seen_attrs = (m == MATCH_YES);
7582 /* Check that attribute DEFERRED is given iff an interface is specified, which
7583 means target != NULL. */
7584 if (tb->deferred && !target)
7586 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7589 if (target && !tb->deferred)
7591 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7595 /* Match the colons. */
7596 m = gfc_match (" ::");
7597 if (m == MATCH_ERROR)
7599 seen_colons = (m == MATCH_YES);
7600 if (seen_attrs && !seen_colons)
7602 gfc_error ("Expected '::' after binding-attributes at %C");
7606 /* Match the binding name. */
7607 m = gfc_match_name (name);
7608 if (m == MATCH_ERROR)
7612 gfc_error ("Expected binding name at %C");
7616 /* Try to match the '=> target', if it's there. */
7617 m = gfc_match (" =>");
7618 if (m == MATCH_ERROR)
7624 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7630 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7635 m = gfc_match_name (target_buf);
7636 if (m == MATCH_ERROR)
7640 gfc_error ("Expected binding target after '=>' at %C");
7643 target = target_buf;
7646 /* Now we should have the end. */
7647 m = gfc_match_eos ();
7648 if (m == MATCH_ERROR)
7652 gfc_error ("Junk after PROCEDURE declaration at %C");
7656 /* If no target was found, it has the same name as the binding. */
7660 /* Get the namespace to insert the symbols into. */
7661 ns = block->f2k_derived;
7664 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7665 if (tb->deferred && !block->attr.abstract)
7667 gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT",
7672 /* See if we already have a binding with this name in the symtree which would
7673 be an error. If a GENERIC already targetted this binding, it may be
7674 already there but then typebound is still NULL. */
7675 stree = gfc_find_symtree (ns->tb_sym_root, name);
7676 if (stree && stree->n.tb)
7678 gfc_error ("There's already a procedure with binding name '%s' for the"
7679 " derived type '%s' at %C", name, block->name);
7683 /* Insert it and set attributes. */
7687 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7692 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7694 gfc_set_sym_referenced (tb->u.specific->n.sym);
7700 /* Match a GENERIC procedure binding inside a derived type. */
7703 gfc_match_generic (void)
7705 char name[GFC_MAX_SYMBOL_LEN + 1];
7706 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7708 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7709 gfc_typebound_proc* tb;
7711 interface_type op_type;
7712 gfc_intrinsic_op op;
7715 /* Check current state. */
7716 if (gfc_current_state () == COMP_DERIVED)
7718 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7721 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7723 block = gfc_state_stack->previous->sym;
7724 ns = block->f2k_derived;
7725 gcc_assert (block && ns);
7727 /* See if we get an access-specifier. */
7728 m = match_binding_attributes (&tbattr, true, false);
7729 if (m == MATCH_ERROR)
7732 /* Now the colons, those are required. */
7733 if (gfc_match (" ::") != MATCH_YES)
7735 gfc_error ("Expected '::' at %C");
7739 /* Match the binding name; depending on type (operator / generic) format
7740 it for future error messages into bind_name. */
7742 m = gfc_match_generic_spec (&op_type, name, &op);
7743 if (m == MATCH_ERROR)
7747 gfc_error ("Expected generic name or operator descriptor at %C");
7753 case INTERFACE_GENERIC:
7754 snprintf (bind_name, sizeof (bind_name), "%s", name);
7757 case INTERFACE_USER_OP:
7758 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7761 case INTERFACE_INTRINSIC_OP:
7762 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7763 gfc_op2string (op));
7770 /* Match the required =>. */
7771 if (gfc_match (" =>") != MATCH_YES)
7773 gfc_error ("Expected '=>' at %C");
7777 /* Try to find existing GENERIC binding with this name / for this operator;
7778 if there is something, check that it is another GENERIC and then extend
7779 it rather than building a new node. Otherwise, create it and put it
7780 at the right position. */
7784 case INTERFACE_USER_OP:
7785 case INTERFACE_GENERIC:
7787 const bool is_op = (op_type == INTERFACE_USER_OP);
7790 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7802 case INTERFACE_INTRINSIC_OP:
7812 if (!tb->is_generic)
7814 gcc_assert (op_type == INTERFACE_GENERIC);
7815 gfc_error ("There's already a non-generic procedure with binding name"
7816 " '%s' for the derived type '%s' at %C",
7817 bind_name, block->name);
7821 if (tb->access != tbattr.access)
7823 gfc_error ("Binding at %C must have the same access as already"
7824 " defined binding '%s'", bind_name);
7830 tb = gfc_get_typebound_proc ();
7831 tb->where = gfc_current_locus;
7832 tb->access = tbattr.access;
7834 tb->u.generic = NULL;
7838 case INTERFACE_GENERIC:
7839 case INTERFACE_USER_OP:
7841 const bool is_op = (op_type == INTERFACE_USER_OP);
7844 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7852 case INTERFACE_INTRINSIC_OP:
7861 /* Now, match all following names as specific targets. */
7864 gfc_symtree* target_st;
7865 gfc_tbp_generic* target;
7867 m = gfc_match_name (name);
7868 if (m == MATCH_ERROR)
7872 gfc_error ("Expected specific binding name at %C");
7876 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7878 /* See if this is a duplicate specification. */
7879 for (target = tb->u.generic; target; target = target->next)
7880 if (target_st == target->specific_st)
7882 gfc_error ("'%s' already defined as specific binding for the"
7883 " generic '%s' at %C", name, bind_name);
7887 target = gfc_get_tbp_generic ();
7888 target->specific_st = target_st;
7889 target->specific = NULL;
7890 target->next = tb->u.generic;
7891 tb->u.generic = target;
7893 while (gfc_match (" ,") == MATCH_YES);
7895 /* Here should be the end. */
7896 if (gfc_match_eos () != MATCH_YES)
7898 gfc_error ("Junk after GENERIC binding at %C");
7909 /* Match a FINAL declaration inside a derived type. */
7912 gfc_match_final_decl (void)
7914 char name[GFC_MAX_SYMBOL_LEN + 1];
7917 gfc_namespace* module_ns;
7921 if (gfc_current_form == FORM_FREE)
7923 char c = gfc_peek_ascii_char ();
7924 if (!gfc_is_whitespace (c) && c != ':')
7928 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7930 if (gfc_current_form == FORM_FIXED)
7933 gfc_error ("FINAL declaration at %C must be inside a derived type "
7934 "CONTAINS section");
7938 block = gfc_state_stack->previous->sym;
7941 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7942 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7944 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7945 " specification part of a MODULE");
7949 module_ns = gfc_current_ns;
7950 gcc_assert (module_ns);
7951 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7953 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7954 if (gfc_match (" ::") == MATCH_ERROR)
7957 /* Match the sequence of procedure names. */
7964 if (first && gfc_match_eos () == MATCH_YES)
7966 gfc_error ("Empty FINAL at %C");
7970 m = gfc_match_name (name);
7973 gfc_error ("Expected module procedure name at %C");
7976 else if (m != MATCH_YES)
7979 if (gfc_match_eos () == MATCH_YES)
7981 if (!last && gfc_match_char (',') != MATCH_YES)
7983 gfc_error ("Expected ',' at %C");
7987 if (gfc_get_symbol (name, module_ns, &sym))
7989 gfc_error ("Unknown procedure name \"%s\" at %C", name);
7993 /* Mark the symbol as module procedure. */
7994 if (sym->attr.proc != PROC_MODULE
7995 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7996 sym->name, NULL) == FAILURE)
7999 /* Check if we already have this symbol in the list, this is an error. */
8000 for (f = block->f2k_derived->finalizers; f; f = f->next)
8001 if (f->proc_sym == sym)
8003 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8008 /* Add this symbol to the list of finalizers. */
8009 gcc_assert (block->f2k_derived);
8011 f = XCNEW (gfc_finalizer);
8013 f->proc_tree = NULL;
8014 f->where = gfc_current_locus;
8015 f->next = block->f2k_derived->finalizers;
8016 block->f2k_derived->finalizers = f;
8026 const ext_attr_t ext_attr_list[] = {
8027 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
8028 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
8029 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
8030 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
8031 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
8032 { NULL, EXT_ATTR_LAST, NULL }
8035 /* Match a !GCC$ ATTRIBUTES statement of the form:
8036 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8037 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8039 TODO: We should support all GCC attributes using the same syntax for
8040 the attribute list, i.e. the list in C
8041 __attributes(( attribute-list ))
8043 !GCC$ ATTRIBUTES attribute-list ::
8044 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8047 As there is absolutely no risk of confusion, we should never return
8050 gfc_match_gcc_attributes (void)
8052 symbol_attribute attr;
8053 char name[GFC_MAX_SYMBOL_LEN + 1];
8058 gfc_clear_attr (&attr);
8063 if (gfc_match_name (name) != MATCH_YES)
8066 for (id = 0; id < EXT_ATTR_LAST; id++)
8067 if (strcmp (name, ext_attr_list[id].name) == 0)
8070 if (id == EXT_ATTR_LAST)
8072 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8076 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
8080 gfc_gobble_whitespace ();
8081 ch = gfc_next_ascii_char ();
8084 /* This is the successful exit condition for the loop. */
8085 if (gfc_next_ascii_char () == ':')
8095 if (gfc_match_eos () == MATCH_YES)
8100 m = gfc_match_name (name);
8104 if (find_special (name, &sym, true))
8107 sym->attr.ext_attr |= attr.ext_attr;
8109 if (gfc_match_eos () == MATCH_YES)
8112 if (gfc_match_char (',') != MATCH_YES)
8119 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");