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{-# LANGUAGE CPP #-}
#if !MIN_VERSION_base(4,5,0)
# error This module doesn't provide compat-shims for versions prior to base-4.5
#endif
-- | Bridge impedance mismatch of different @base@ versions back till @base-4.5@ (GHC 7.4.2)
module CompatPrelude
( ($>)
, isSymbolChar
) where
#if MIN_VERSION_base(4,7,0)
import Data.Functor ( ($>) )
#else
import Data.Functor ( (<$) )
#endif
#if MIN_VERSION_base(4,9,0)
import Text.Read.Lex (isSymbolChar)
#else
import Data.Char (GeneralCategory(..), generalCategory)
#endif
#if !MIN_VERSION_base(4,7,0)
infixl 4 $>
-- | Flipped version of '<$'.
--
-- @since 4.7.0.0
($>) :: Functor f => f a -> b -> f b
($>) = flip (<$)
#endif
#if !MIN_VERSION_base(4,9,0)
-- inlined from base-4.10.0.0
isSymbolChar :: Char -> Bool
isSymbolChar c = not (isPuncChar c) && case generalCategory c of
MathSymbol -> True
CurrencySymbol -> True
ModifierSymbol -> True
OtherSymbol -> True
DashPunctuation -> True
OtherPunctuation -> c `notElem` "'\""
ConnectorPunctuation -> c /= '_'
_ -> False
where
-- | The @special@ character class as defined in the Haskell Report.
isPuncChar :: Char -> Bool
isPuncChar = (`elem` (",;()[]{}`" :: String))
#endif
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