/// <summary>
/// identifier-not-typedef-name
/// : T_IDENTIFIER
/// ;
///
/// Fail if the identifier is a typedef name.
/// </summary>
/// <returns></returns>
public static Parserc.Parser <Token.Token, Id> IdentifierNotTypedefName()
{
return(Get <T_IDENTIFIER>()
.Bind(id => Env.IsTypedefName(id.name) ?
Zero <Token.Token, Id>() : Result <Token.Token, Id>(new Id(id))));
}