/* Lists of symbols for Bison
- Copyright (C) 2002, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2005-2007, 2009-2015 Free Software Foundation,
+ Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bison; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef SYMLIST_H_
# define SYMLIST_H_
# include "location.h"
+# include "scan-code.h"
# include "symtab.h"
+# include "named-ref.h"
/* A list of symbols, used during the parsing to store the rules. */
typedef struct symbol_list
{
- /* The symbol. */
- symbol *sym;
+ /**
+ * Whether this node contains a symbol, a semantic type, a \c <*>, or a
+ * \c <>.
+ */
+ enum {
+ SYMLIST_SYMBOL,
+ SYMLIST_TYPE
+ } content_type;
+ union {
+ /**
+ * The symbol or \c NULL iff
+ * <tt>symbol_list::content_type = SYMLIST_SYMBOL</tt>.
+ */
+ symbol *sym;
+ /**
+ * The semantic type iff <tt>symbol_list::content_type = SYMLIST_TYPE</tt>.
+ */
+ semantic_type *sem_type;
+ } content;
location location;
- /* The action is attached to the LHS of a rule. */
- const char *action;
- location action_location;
+ /* Named reference. */
+ named_ref *named_ref;
- /* Whether this symbol's value is used in the current action. */
- bool used;
+ /* Proper location of the symbol, not all the rule */
+ location sym_loc;
+
+ /* If this symbol is the generated lhs for a midrule but this is the rule in
+ whose rhs it appears, MIDRULE = a pointer to that midrule. */
+ struct symbol_list *midrule;
+
+ /* If this symbol is the generated lhs for a midrule and this is that
+ midrule, MIDRULE_PARENT_RULE = a pointer to the rule in whose rhs it
+ appears, and MIDRULE_PARENT_RHS_INDEX = its rhs index (1-origin) in the
+ parent rule. */
+ struct symbol_list *midrule_parent_rule;
+ int midrule_parent_rhs_index;
+
+ /* ---------------------------------------------- */
+ /* Apply to the rule (attached to the LHS only). */
+ /* ---------------------------------------------- */
/* Precedence/associativity. */
symbol *ruleprec;
+
+ /* The action is attached to the LHS of a rule, but action properties for
+ * each RHS are also stored here. */
+ code_props action_props;
+
+ /* The location of the first %empty for this rule, or \a
+ empty_location. */
+ location percent_empty_loc;
+
int dprec;
+ location dprec_location;
int merger;
+ location merger_declaration_location;
/* The list. */
struct symbol_list *next;
} symbol_list;
-/* Create a list containing SYM at LOC. */
-symbol_list *symbol_list_new (symbol *sym, location loc);
+/** Create a list containing \c sym at \c loc. */
+symbol_list *symbol_list_sym_new (symbol *sym, location loc);
+
+/** Create a list containing \c type_name at \c loc. */
+symbol_list *symbol_list_type_new (uniqstr type_name, location loc);
+
+/** Print this list.
-/* Print it. */
-void symbol_list_print (symbol_list *l, FILE *f);
+ \pre For every node \c n in the list, <tt>n->content_type =
+ SYMLIST_SYMBOL</tt>. */
+void symbol_list_syms_print (const symbol_list *l, FILE *f);
-/* Prepend SYM at LOC to the LIST. */
-symbol_list *symbol_list_prepend (symbol_list *l,
- symbol *sym,
- location loc);
+/** Prepend \c node to \c list. */
+symbol_list *symbol_list_prepend (symbol_list *list, symbol_list *node);
-/* Free the LIST, but not the symbols it contains. */
-void symbol_list_free (symbol_list *l);
+/** Append \c node to \c list. */
+symbol_list *symbol_list_append (symbol_list *list, symbol_list *node);
-/* Return its length. */
-unsigned int symbol_list_length (symbol_list *l);
+/** Free \c list, but not the items it contains. */
+void symbol_list_free (symbol_list *list);
-/* Get symbol N in symbol list L. */
+/** Return the length of \c l. */
+int symbol_list_length (symbol_list const *l);
+
+/** Get item \c n in symbol list \c l.
+ ** \pre 0 <= n
+ ** \post res != NULL
+ **/
symbol_list *symbol_list_n_get (symbol_list *l, int n);
/* Get the data type (alternative in the union) of the value for
symbol N in rule RULE. */
-uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
+uniqstr symbol_list_n_type_name_get (symbol_list *l, int n);
+
+/* Check whether the node is a border element of a rule. */
+bool symbol_list_null (symbol_list *node);
-/* The symbol N in symbol list L is USED. */
-void symbol_list_n_used_set (symbol_list *l, int n, bool used);
+/** Set the \c \%destructor or \c \%printer for \c node as \c cprops. */
+void symbol_list_code_props_set (symbol_list *node, code_props_type kind,
+ code_props const *cprops);
#endif /* !SYMLIST_H_ */
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