I wonder if Qi can express GADTs to allow proof of balance properties, as in this Haskell example: https://github.com/yairchu/red-black-tree/blob/master/RedBla

I wonder if Qi can express GADTs to allow proof of balance properties, as in this Haskell example: https://github.com/yairchu/red-black-tree/blob/master/RedBlackTree.hs https://github.com/yairchu/red-black-tree/blob/master/RedBla...