internal override void Walk(EmitContext ec)
{
if (ec.Emitting)
{
ec.EmitRArray(alen);
}
int i = 0;
for (RNode n = this; n != null;)
{
if (n is RNArray)
{
if (n.head != null)
{
if (ec.Emitting)
{
ec.EmitDup();
ec.EmitInt(i);
}
n.head.Walk(ec);
if (ec.Emitting)
{
ec.EmitRArraySet();
}
}
n = n.next;
i++;
}
else
{
// n.Walk(ec);
// break;
throw new NotSupportedException("bug: array has tail of type " + n.GetType().Name);
}
}
}
internal override void Walk(EmitContext ec)
{
// Linear scan of linked list for O(1) stack space
for (RNode n = this; n != null;)
{
if (n is RNBlock)
{
RNode current = n.head;
current.Walk(ec);
n = n.next;
if (ec.Emitting && n != null)
{
// Discard previous result, block returns last value generated
ec.EmitDiscard();
}
}
else
{
throw new NotSupportedException("bug: not supported block tail: " + n.GetType().Name);
}
}
}