internal override bool apply(ParseContext ctxt, ref Tok result, ref AbstractParsecError err)
{
int original_step = ctxt.getStep();
int original_at = ctxt.getAt();
S tmp = default(S);
if (!scanner.parse(ctxt, ref tmp, ref err))
{
return(false);
}
int cur = ctxt.getAt();
int len = cur - original_at;
object tok = tn(ctxt.getSource(), original_at, len);
//The java version uses null to indicate a failure. It doesn't not seem to be used though. So we keep it simple.
result = new Tok(original_at, len, tok);
ctxt.setStep(original_step + 1);
return(true);
}
