X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/56c47203421107ee019a20f3b56cfb967ad75bd2..31f8b787c0f6c29b2684a400eaa6300b7a7b7448:/src/symlist.h

diff --git a/src/symlist.h b/src/symlist.h
index b41540ba..c5df78ce 100644
--- a/src/symlist.h
+++ b/src/symlist.h
@@ -1,60 +1,119 @@
 /* Lists of symbols for Bison
-   Copyright (C) 2002  Free Software Foundation, Inc.
+
+   Copyright (C) 2002, 2005, 2006, 2007, 2009, 2010 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., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef SYMLIST_H_
 # define SYMLIST_H_
 
-# include "symtab.h"
 # include "location.h"
+# include "scan-code.h"
+# include "symtab.h"
 
-typedef struct symbol_list_s
+/* A list of symbols, used during the parsing to store the rules.  */
+typedef struct symbol_list
 {
-  struct symbol_list_s *next;
-  symbol_t *sym;
-  location_t location;
-
-  /* The action is attached to the LHS of a rule. */
-  const char *action;
-  location_t action_location;
-
-  symbol_t *ruleprec;
-} symbol_list_t;
-
-
-/* Create a list containing SYMBOL at LOCATION.  */
-symbol_list_t *symbol_list_new PARAMS ((symbol_t *sym, location_t location));
-
-
-/* Prepend SYMBOL at LOCATION to the LIST.  */
-symbol_list_t * symbol_list_prepend PARAMS ((symbol_list_t *list,
-					     symbol_t *symbol,
-					     location_t location));
-
-
-/* Free the LIST, but not the symbols it contains.  */
-void symbol_list_free PARAMS ((symbol_list_t *list));
-
+  /**
+   * Whether this node contains a symbol, a semantic type, a \c <*>, or a
+   * \c <>.
+   */
+  enum {
+    SYMLIST_SYMBOL, SYMLIST_TYPE,
+    SYMLIST_DEFAULT_TAGGED, SYMLIST_DEFAULT_TAGLESS
+  } 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>.
+     */
+    uniqstr type_name;
+  } content;
+  location location;
+
+  /* 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;
+
+  /* The action is attached to the LHS of a rule, but action properties for
+   * each RHS are also stored here.  */
+  code_props action_props;
+
+  /* Precedence/associativity.  */
+  symbol *ruleprec;
+  int dprec;
+  int merger;
+  location merger_declaration_location;
+
+  /* The list.  */
+  struct symbol_list *next;
+} symbol_list;
+
+
+/** 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);
+
+/** Create a list containing a \c <*> at \c loc.  */
+symbol_list *symbol_list_default_tagged_new (location loc);
+/** Create a list containing a \c <> at \c loc.  */
+symbol_list *symbol_list_default_tagless_new (location loc);
+
+/** Print this list.
+
+  \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 \c node to \c list.  */
+symbol_list *symbol_list_prepend (symbol_list *list, symbol_list *node);
+
+/** Free \c list, but not the items it contains.  */
+void symbol_list_free (symbol_list *list);
+
+/** Return the length of \c l. */
+int symbol_list_length (symbol_list const *l);
+
+/** Get item \c n in symbol list \c l.  */
+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.  */
-char *symbol_list_n_type_name_get PARAMS ((symbol_list_t *rule,
-					   location_t location, int n));
+uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
+
+/** Set the \c \%destructor for \c node as \c code at \c loc.  */
+void symbol_list_destructor_set (symbol_list *node, char const *code,
+                                 location loc);
+
+/** Set the \c \%printer for \c node as \c code at \c loc.  */
+void symbol_list_printer_set (symbol_list *node, char const *code,
+                              location loc);
 
 #endif /* !SYMLIST_H_ */