private static void Consume(IEnumerator <Token> tokens, Token.ETokenTypes expected)
{
if (!tokens.MoveNext())
{
throw new ParseException(string.Format("End of program when expecting '{0}'", expected));
}
if (tokens.Current.TokenType != expected)
{
throw new ParseException(string.Format("Found token '{0}' when expecting '{1}'", tokens.Current, expected));
}
}
private bool TryConsume(Token.ETokenTypes expected)
{
return(_tokenEnumerator.HasNext && _tokenEnumerator.Next.TokenType == expected && _tokenEnumerator.MoveNext());
}
