private ParsecError getSysUnexpected(int i)
{
if (i >= sys_unexpected.Length)
{
return(eof_unexpected);
}
ParsecError r = sys_unexpected[i];
if (r == null)
{
Tok ptok = input[i];
r = ParsecError.raiseSysUnexpected(ptok.Index,
show(ptok.Token));
sys_unexpected[i] = r;
}
return(r);
}
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);
}
//caller should not change input after it is passed in.
internal ParserState(Tok[] input,
int at, string module, PositionMap pmap,
int end_index,
string eof_str, ShowToken show)
: base(at, module, pmap)
{
this.input = input;
this.sys_unexpected = new ParsecError[input.Length];
this.show = show;
this.end_index = end_index;
this.eof_unexpected = ParsecError.raiseSysUnexpected(
end_index, eof_str);
}