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Added function for upgrading Word8 isomorphisms to work with ByteString ... #42

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Added function for upgrading Word8 isomorphisms to work with ByteString ... #42

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11 changes: 11 additions & 0 deletions src/Pipes/ByteString.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -129,6 +129,9 @@ module Pipes.ByteString (
, lines
, words

-- * Utilities
, pipeIso

-- * Re-exports
-- $reexports
, module Data.ByteString
Expand Down Expand Up @@ -988,6 +991,14 @@ words = Data.Profunctor.dimap _words (fmap _unwords)
_unwords = PG.intercalates (yield $ BS.singleton $ fromIntegral $ ord ' ')
{-# INLINABLE words #-}

-- | Upgrade a 'Word8' isomorphism to work with 'ByteString' 'Producer's
pipeIso
:: Monad m
=> Iso' Word8 Word8
-> Iso' (Proxy x' x () ByteString m r) (Proxy x' x () ByteString m r)
pipeIso = PP.mapIso $ (<-<) . map
{-# INLINABLE pipeIso #-}

{- $parse
The following parsing utilities are single-byte analogs of the ones found
in @pipes-parse@.
Expand Down