41 lines
858 B
Haskell
41 lines
858 B
Haskell
{-# LANGUAGE BangPatterns #-}
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{-# LANGUAGE DeriveDataTypeable #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE RebindableSyntax #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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-- |
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-- Module : Basement.Compat.IsList
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-- License : BSD-style
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-- Maintainer : Vincent Hanquez <vincent@snarc.org>
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-- Stability : experimental
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-- Portability : portable
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--
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-- compat friendly version of IsList
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE CPP #-}
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module Basement.Compat.IsList
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( IsList(..)
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) where
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#if MIN_VERSION_base(4,7,0)
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import GHC.Exts
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#else
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import qualified Prelude
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class IsList l where
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type Item l
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fromList :: [Item l] -> l
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toList :: l -> [Item l]
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fromListN :: Prelude.Int -> [Item l] -> l
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fromListN _ = fromList
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instance IsList [a] where
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type Item [a] = a
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fromList = Prelude.id
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toList = Prelude.id
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#endif
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