Fix bug such that the first pushed token's value and location are

[bison.git] / src / symlist.h

diff --git a/src/symlist.h b/src/symlist.h
index a2272608c1b90e4dfb231e96da2ba1674a333dce..8bb7e8970f103462b408b45b65f5307c75c5bad9 100644 (file)
--- a/src/symlist.h
+++ b/src/symlist.h
@@ -1,6 +1,6 @@
 /* Lists of symbols for Bison
 
 /* Lists of symbols for Bison
 

-   Copyright (C) 2002, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -28,8 +28,20 @@
 /* A list of symbols, used during the parsing to store the rules.  */
 typedef struct symbol_list
 {
 /* 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,
+    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
   location location;
 
   /* If this symbol is the generated lhs for a midrule but this is the rule in


@@ -47,7 +59,7 @@ typedef struct symbol_list
   const char *action;
   location action_location;
 
   const char *action;
   location action_location;
 

-  /* Whether this symbol's value is used in the current action. */
+  /* Whether this symbol's value is used in the current action.  */

   bool used;
 
   /* Precedence/associativity.  */
   bool used;
 
   /* Precedence/associativity.  */


@@ -61,31 +73,48 @@ typedef struct symbol_list
 } symbol_list;
 
 
 } 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);

 
 

-/* Print it.  */
-void symbol_list_print (const symbol_list *l, FILE *f);
+/** 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 *l,
-                                 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.  */
-void symbol_list_free (symbol_list *l);
+/** Print this list.

 
 

-/* Return its length. */
-unsigned int symbol_list_length (const symbol_list *l);
+  \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);

 
 

-/* Get symbol N in symbol list L.  */
+/** 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.  */
 uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
 
 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);
 

-/* The symbol N in symbol list L is USED.  */
+/** 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);
 
 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_ */
 #endif /* !SYMLIST_H_ */