{-# OPTIONS_GHC -XModalTypes -fflatten -funsafe-skolemize -dcore-lint -XScopedTypeVariables -fsimpleopt-before-flatten #-} module Demo (demo) where {- demo const mult = <{ \y -> ~~mult (~~mult y y) (~~mult y y) }> -} {- demo const mult = <{ \y -> ~~mult (~~mult (~~mult y y) (~~mult y y)) (~~mult (~~mult y y) (~~mult y y)) }> -} {- demo const mult = <{ \y -> ~~(foo 4) }> where foo 0 = const (12::Int) foo n = <{ let bar = ~~(foo (n-1)) in ~~mult bar bar }> -} {- demo const mult = <{ \y -> ~~(foo 3) }> where foo 0 = const (12::Int) foo n = <{ let recurs = ~~(foo (n-1)) in ~~mult recurs recurs }> -} demo const mult = <{ \y -> let foo = ~~mult (~~mult foo (~~mult y foo)) y in foo }> {- demo const mult = <{ \y -> ~~(foo 2 <{y}>) }> where foo 0 y = const (12::Int) foo n y = <{ let recurs = ~~(foo (n-1) y) in ~~mult recurs recurs }> -} -- demo const mult = <{ \(y::Int) -> ~~mult y ~~(const 12) }> -- demo' n = <{ ~~mult ~~(demo' (n-1)) ~~(demo' (n-1)) }> -- golden {- demo const mult = <{ \y -> let twelve = ~~mult twelve y in twelve }> -} {- demo const mult = <{ \y -> let y = ~~(const 4) in ~~mult (~~mult y y) (~~mult y y) }> -} {- demo const mult = <{ \(y::Int) -> let four = ~~mult four ~~(const 4) -- twelve = {- {- ~~mult four -} ~~(const 12) -} four in four }> -} demo :: forall c . (Int -> <{Int}>@c) -> <{Int -> Int -> Int}>@c -> <{Int -> Int}>@c {- demo const mult = <{ let twelve = ~~(const (12::Int)) in let four = ~~(const (4::Int)) in ~~mult four twelve }> -} {- demo const mult = demo' 3 where demo' 0 = const 12 demo' 1 = const 12 demo' n = <{ ~~mult ~~(demo' (n-1)) ~~(demo' (n-2)) }> -} -- BUG --demo const mult = <{ \y -> ~~(demo' 0) }> -- where -- demo' 0 = const 4 -- demo' n = const 4