internal override void TryAlt(ref Worker wr, int i, Cont <X> xK, Else xE)
{
var pk = xE.pk;
if (0 == Pick.Claim(pk))
{
Alt <X> xA;
try {
xA = Do(Randomizer.Next(ref wr.RandomLo, ref wr.RandomHi));
Pick.Unclaim(pk);
} catch (Exception e) {
Pick.PickClaimedAndSetNacks(ref wr, i, pk);
xA = new AltFail <X>(e);
}
xA.TryAlt(ref wr, i, xK, xE);
}
}
internal override void TryAlt(ref Worker wr, int i, Cont <X> xK, Else xE)
{
var pk = xE.pk;
var nk = Pick.ClaimAndAddNack(pk, i);
if (null != nk)
{
Alt <X> xA;
try {
xA = Do(nk);
Pick.Unclaim(pk);
} catch (Exception e) {
Pick.PickClaimedAndSetNacks(ref wr, i, pk);
xA = new AltFail <X>(e);
}
xA.TryAlt(ref wr, i, xK, new WithNackElse(nk, xE));
}
}