internal bool ConsumeOptionalTerm(Terms.Terminal term)
{
ConsumeWhiteSpace();
var tok = term.GetToken(Input, _index);
if (tok == null)
return false;
ConsumeToken(tok);
return true;
}
internal void ConsumeTerm(Terms.Terminal term)
{
ConsumeWhiteSpace();
var tok = term.GetToken(Input, _index);
if (tok == null)
throw UnexpectedText(term.TokenType);
ConsumeToken(tok);
}
internal bool IsNextTerm(Terms.Terminal term)
{
ConsumeWhiteSpace();
return term.GetToken(Input, _index) != null;
}