X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/e39214489e3fb6a8c9b2859673c049eab3898f35..2e7944cbb21e10c130192f733abc1af5cd8b6eb7:/src/symlist.h

diff --git a/src/symlist.h b/src/symlist.h
index c88c0cae..8bb7e897 100644
--- a/src/symlist.h
+++ b/src/symlist.h
@@ -1,6 +1,6 @@
 /* Lists of symbols for Bison
 
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -16,8 +16,8 @@
 
    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.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 #ifndef SYMLIST_H_
 # define SYMLIST_H_
@@ -25,38 +25,96 @@
 # include "location.h"
 # include "symtab.h"
 
+/* A list of symbols, used during the parsing to store the rules.  */
 typedef struct symbol_list
 {
-  struct symbol_list *next;
-  symbol *sym;
+  /**
+   * 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>node_type = SYMLIST_SYMBOL</tt>.  */
+    symbol *sym;
+    /** The semantic type iff <tt>node_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. */
   const char *action;
   location action_location;
 
+  /* Whether this symbol's value is used in the current action.  */
+  bool used;
+
+  /* Precedence/associativity.  */
   symbol *ruleprec;
   int dprec;
   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);
 
-/* Prepend SYM at LOC to the LIST.  */
-symbol_list *symbol_list_prepend (symbol_list *list,
-				  symbol *sym,
-				  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);
 
-/* Free the LIST, but not the symbols it contains.  */
+/** 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 its length. */
-unsigned int symbol_list_length (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.  */
-uniqstr symbol_list_n_type_name_get (symbol_list *rp, location loc, int n);
+uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
+
+/** The item \c n in symbol list \c l is \c used.  */
+void symbol_list_n_used_set (symbol_list *l, int n, bool used);
+
+/** Set the \c \%destructor for \c node as \c destructor at \c loc.  */
+void symbol_list_destructor_set (symbol_list *node, const char *destructor,
+                                 location loc);
+
+/** Set the \c \%printer for \c node as \c printer at \c loc.  */
+void symbol_list_printer_set (symbol_list *node, const char *printer,
+                              location loc);
 
 #endif /* !SYMLIST_H_ */