// Utils
private Token Expect(TokenKind expected)
{
if (tokens.Current.Kind != expected)
{
var message = String.Format("{0}: Expecting {1}, but got {2}", tokens.Current.Span, expected.GetDescription(), tokens.Current);
OnParseError(new SyntacticErrorEventArgs(message));
}
var token = tokens.Current;
tokens.MoveNext();
return(token);
}
