private void ThrowParseException(LookAheadSet set)
{
ArrayList list = new ArrayList();
// Read tokens until mismatch
while (set.IsNext(this, 1))
{
set = set.CreateNextSet(NextToken().Id);
}
// Find next token descriptions
var initials = set.GetInitialTokens();
for (int i = 0; i < initials.Length; i++)
{
list.Add(GetTokenDescription(initials[i]));
}
// Create exception
var token = NextToken();
throw new ParseException(ParseException.ErrorType.UNEXPECTED_TOKEN,
token.ToShortString(),
list,
token.StartLine,
token.StartColumn);
}
private bool IsNext(ProductionPatternAlternative alt)
{
LookAheadSet set = alt.LookAhead;
if (set == null)
{
return(false);
}
else
{
return(set.IsNext(this));
}
}
private bool IsNext(ProductionPattern pattern)
{
LookAheadSet set = pattern.LookAhead;
if (set == null)
{
return(false);
}
else
{
return(set.IsNext(this));
}
}
private bool IsNext(ProductionPatternElement elem)
{
LookAheadSet set = elem.LookAhead;
if (set != null)
{
return(set.IsNext(this));
}
else if (elem.IsToken())
{
return(elem.IsMatch(PeekToken(0)));
}
else
{
return(IsNext(GetPattern(elem.Id)));
}
}
