{-# 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