private static void Skip(ref ZipContext <T2, C2, T, C> context, out Option <Tuple <T, T2> > next)
{
context.bd.DetectBacktrack();
if (context.needsMove)
{
context.left.skip(ref context.left.context, out context.left.current);
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 <Tuple <T, T2> >(new Tuple <T, T2>(context.left.current.value, context.right.current.value));
}
else
{
next = new Option <Tuple <T, T2> >();
context.bd.Release();
if (context.left.current.isSome)
{
context.left.dispose(ref context.left.context, out context.left.current);
}
else if (context.right.current.isSome)
{
context.right.dispose(ref context.right.context, out context.right.current);
}
}
}
private static void Remove(ref ZipContext <T2, C2, T, C> context, out Option <Tuple <T, T2> > next)
{
context.bd.DetectBacktrack();
context.needsMove = false;
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.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 ZipContext <T2, C2, T, C> context, out Option <Tuple <T, T2> > next)
{
next = new Option <Tuple <T, T2> >();
context.bd.Release();
context.left.dispose(ref context.left.context, out context.left.current);
context.right.dispose(ref context.right.context, out context.right.current);
}
