* data/c.m4 (b4_token_enum): Always define the enum of tokens,

even if empty.
* data/lalrl1.cc, data/glr.cc (parser::token_type): New.
* doc/bison.texinfo (Calc++ Scanner): Use it.

data/glr.cc

@@ -312,6 +312,8 @@ b4_syncline([@oline@], [@ofile@])
     {
       ]b4_token_enums(b4_tokens)[
     };
+    /// Token type.
+    typedef token::yytokentype token_type;
 
     /// Build a parser object.
     ]b4_parser_class_name[ (]b4_parse_param_decl[);