management is performed once instead of three times). I suggest that
we do the same in yacc.c.
-** yysyntax_error
-In lalr1.cc we invoke it with the translated lookahead (yytoken), and
-yacc.c uses yychar. I don't see why.
-
** yysyntax_error
The code bw glr.c and yacc.c is really alike, we can certainly factor
some parts.