Directory.hs

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

{- | The name @directory@, targeting 'FilePath': a directory that something is about.

Any value of the target type has the name, as the identity.

@since 0.2.0.0
-}
module Document.Build.Name.Directory (
  DirectoryLike (..),
) where

import Control.Lens (Optic)

{- | A field or a constructor named @directory@.

@since 0.2.0.0
-}
class DirectoryLike p f x x' where
  directory ::
    Optic p f x x' FilePath FilePath

{- | Identity

@since 0.2.0.0
-}
instance (x' ~ FilePath) => DirectoryLike p f FilePath x' where
  directory =
    id
  {-# INLINE directory #-}