InvalidPositive.hs

{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -Wall #-}

-- | The name @invalidPositive@, which targets @Natural@. It names a field or constructor of @InvalidValue@.
module ReOC.Name.InvalidPositive (
  InvalidPositiveLike (..),
) where

import Control.Lens (Optic)
import Numeric.Natural (Natural)

class InvalidPositiveLike p f x x' where
  invalidPositive ::
    Optic p f x x' Natural Natural

-- | Identity
instance (x' ~ Natural) => InvalidPositiveLike p f Natural x' where
  invalidPositive = id