public override bool TryMatchCurrent(LexerBuilder lexer)
{
var prev = lexer.Previous;
var first = lexer.Current;
// check for keywords
if (lexer.IsDelimiter(prev, true) && char.IsLetter(first))
{
// can be a keyword...
var sb = new StringBuilder();
sb.Append(lexer.Current);
while (!lexer.EndOfInput && char.IsLetter(lexer.PeekNext()))
{
sb.Append(lexer.Current);
}
if (keywords.Contains(sb.ToString()))
{
if (!lexer.EndOfInput)
{
lexer.RollbackBy(1);
}
lexer.Commit();
return(true);
}
return(false);
}
else
{
return(false);
}
}
