Add currentStack, and define currentRule in terms of it
Add currentStack, and define currentRule in terms of it

ndmitchell/shake,nh2/shake,ndmitchell/shake,nh2/shake,ndmitchell/shake,nh2/shake,ndmitchell/shake,nh2/shake,nh2/shake,ndmitchell/shake,ndmitchell/shake