private TokenWord ExpectWord(Token token)
{
if (!(token is TokenWord)) {
throw new ParserException(
string.Format("Unexpected {0} at ({1}:{2})",
token.GetType().Name,
token.Line,
token.Column)
);
}
return token as TokenWord;
}
private Token ExpectIndexOrString(Token token)
{
if (!((token is TokenIndex) || (token is TokenString))) {
throw new ParserException(
string.Format("Unexpected {0} at ({1}:{2})",
token.GetType().Name,
token.Line,
token.Column)
);
}
return token;
}