public override Value Next()
{
using var popper = new RegionPopper(region, "for-generator");
popper.Push();
if (blockGenerating)
{
parameters.SetValues(sourceValue, index);
var value = blockGenerator.Next();
if (!value.IsNil)
{
index++;
return(value);
}
blockGenerating = false;
}
sourceValue = sourceGenerator.Next();
if (sourceValue.IsNil)
{
return(sourceValue);
}
blockGenerator.Reset();
index++;
blockGenerating = true;
return(Values.Ignore.IgnoreValue);
}
public override Value Next()
{
using var outerPopper = new ObjectRegionPopper(objectRegion, "object-region");
outerPopper.Push();
using var innerPopper = new SharedRegionPopper(region, sharedRegion, "lambda-generator");
innerPopper.Push();
var next = block.Next();
more = !next.IsNil;
return(next);
}
protected IMaybe <Value> evaluateGenerator(INSGenerator generator, int i)
{
_currentGenerator = generator.Some();
generator.Region = Region;
generator.Reset();
var returnValue = generator.Next();
if (returnValue.IsNil)
{
_currentGenerator = none <INSGenerator>();
return(none <Value>());
}
index = i + 1;
return(block.evaluateReturn(returnValue).Some());
}
public override Value Next()
{
using var popper = new RegionPopper(region, "while-generator");
popper.Push();
if (index++ < MAX_LOOP && (!checkPredicate || predicate()))
{
var next = blockGenerator.Next();
checkPredicate = false;
if (next.IsNil)
{
next = IgnoreValue;
Reset();
}
return(next);
}
return(NilValue);
}