The closest thing is the geartapped rhs into an rhs. If you see Ratpoison's videos, that's exactly what it's showing.
(Ground Dash) Jump Slash Shoot Reload Dash Switch Dash Slash Switch Dash Shoot.
Not sure about the order of the "reload dash switch" in the middle.
YouTube - Ratpoison lessons part 6
Several variations of DHS or whatever you want to call it are nearer to the end.