private static void Remove(ref ZipAllContext <T2, C2, T, C> context, out Option <Tuple <Option <T>, Option <T2> > > next)
{
context.bd.DetectBacktrack();
context.needsMove = false;
if (!context.left.current.isSome)
{
// noop
}
else if ((context.removeFlags & ZipRemoveFlags.Left) == ZipRemoveFlags.Left)
{
context.left.remove(ref context.left.context, out context.left.current);
}
else
{
context.left.skip(ref context.left.context, out context.left.current);
}
if (!context.right.current.isSome)
{
// noop
}
else if ((context.removeFlags & ZipRemoveFlags.Right) == ZipRemoveFlags.Right)
{
context.right.remove(ref context.right.context, out context.right.current);
}
else
{
context.right.skip(ref context.right.context, out context.right.current);
}
Skip(ref context, out next);
}
private static void Dispose(ref ZipAllContext <T2, C2, T, C> context, out Option <Tuple <Option <T>, Option <T2> > > next)
{
next = new Option <Tuple <Option <T>, Option <T2> > >();
context.bd.Release();
if (context.left.current.isSome)
{
context.left.dispose(ref context.left.context, out context.left.current);
if (context.right.current.isSome)
{
context.right.dispose(ref context.right.context, out context.right.current);
}
}
else
{
context.right.dispose(ref context.right.context, out context.right.current);
}
}
private static void Skip(ref ZipAllContext <T2, C2, T, C> context, out Option <ValueTuple <Option <T>, Option <T2> > > next)
{
context.bd.DetectBacktrack();
if (context.needsMove)
{
if (context.left.current.isSome)
{
context.left.skip(ref context.left.context, out context.left.current);
if (context.right.current.isSome)
{
context.right.skip(ref context.right.context, out context.right.current);
}
}
else
{
context.right.skip(ref context.right.context, out context.right.current);
}
}
else
{
context.needsMove = true;
}
if (context.left.current.isSome || context.right.current.isSome)
{
next = new Option <ValueTuple <Option <T>, Option <T2> > >(
new ValueTuple <Option <T>, Option <T2> >(context.left.current, context.right.current));
}
else
{
next = new Option <ValueTuple <Option <T>, Option <T2> > >();
}
if (!next.isSome)
{
context.bd.Release();
}
}