blob: 7a0915d2984bd4f7109ed8335fc70a14868c8369 (
plain)
1
2
3
4
5
6
7
8
9
|
{-# LANGUAGE TypeFamilies, DataKinds #-}
module ExpandTFs where
-- from https://mail.haskell.org/pipermail/ghc-devs/2020-November/019366.html,
-- where it is requested to expand (Foo Int) in the error message
type family Foo a where Foo Int = String
type family Bar a :: Maybe (Foo Int) where Bar a = '()
|
