shithub: MicroHs

ref: 8a409d5543426756b38b50a32c96465b56ca2e37
dir: /lib/Data/Constraint.hs/

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-- Copyright 2023 Lennart Augustsson
-- See LICENSE file for full license.
module Data.Constraint(module Data.Constraint) where
import Primitives  -- for (->)
import Text.Show

-- A very, very minimal version of the constraints package

data Dict (c :: Constraint) = c => Dict

instance forall (c :: Constraint) . Show (Dict c) where
  showsPrec _ Dict = showString "Dict"

withDict :: forall (c :: Constraint) r . Dict c -> (c => r) -> r
withDict Dict r = r