Add StrictByteString & LazyByteString type aliases (#378)

.gitignore

@@ -7,3 +7,4 @@ ghc.mk
 cabal.sandbox.config
 .hsenv
 *~
+dist-newstyle/

Data/ByteString.hs

@@ -40,8 +40,9 @@
 
 module Data.ByteString (
 
-        -- * The @ByteString@ type
+        -- * Strict @ByteString@
         ByteString,
+        StrictByteString,
 
         -- * Introducing and eliminating 'ByteString's
         empty,

Data/ByteString/Internal.hs

@@ -32,6 +32,8 @@ module Data.ByteString.Internal (
         , PS -- backwards compatibility shim
         ),
 
+        StrictByteString,
+
         -- * Internal indexing
         findIndexOrLength,
 
@@ -201,6 +203,8 @@ data ByteString = BS {-# UNPACK #-} !(ForeignPtr Word8) -- payload
                      -- ^ @since 0.11.0.0
     deriving (Typeable)
 
+-- | Type synonym for the strict flavour of 'ByteString'.
+type StrictByteString = ByteString
 
 -- |
 -- @'PS' foreignPtr offset length@ represents a 'ByteString' with data

Data/ByteString/Lazy.hs

@@ -49,8 +49,9 @@
 
 module Data.ByteString.Lazy (
 
-        -- * The @ByteString@ type
+        -- * Lazy @ByteString@
         ByteString,
+        LazyByteString,
 
         -- * Introducing and eliminating 'ByteString's
         empty,

Data/ByteString/Lazy/Internal.hs

@@ -24,6 +24,7 @@ module Data.ByteString.Lazy.Internal (
 
         -- * The lazy @ByteString@ type and representation
         ByteString(..),
+        LazyByteString,
         chunk,
         foldrChunks,
         foldlChunks,
@@ -80,6 +81,9 @@ data ByteString = Empty | Chunk {-# UNPACK #-} !S.ByteString ByteString
     deriving (Typeable)
 -- See 'invariant' function later in this module for internal invariants.
 
+-- | Type synonym for the lazy flavour of 'ByteString'.
+type LazyByteString = ByteString
+
 instance Eq  ByteString where
     (==)    = eq