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@paf31
paf31 / Main.hs
Last active September 5, 2018 03:54
A simple type checker with Rank N types
module Main where
import Data.Maybe (fromMaybe)
import Control.Applicative
import Control.Arrow (first)
import Control.Monad (ap)
import Debug.Trace
@NicolasT
NicolasT / lens.ml
Created November 30, 2013 00:39
Encoding "van Laarhoven" lenses in OCaml
module type Functor = sig
type 'a t
val map : ('a -> 'b) -> 'a t -> 'b t
end
module type Lens = sig
type a
type b
module Make(F : Functor) : sig

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