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[Lucu.git] / Network / HTTP / Lucu / ETag.hs

diff --git a/Network/HTTP/Lucu/ETag.hs b/Network/HTTP/Lucu/ETag.hs
index d4a157fa2eabeb66d133afe1b25c3393a59f2946..b8191a353fd86dd05c325b3d99d872d5a34e3e9b 100644 (file)
--- a/Network/HTTP/Lucu/ETag.hs
+++ b/Network/HTTP/Lucu/ETag.hs
@@ -1,5 +1,8 @@
 {-# LANGUAGE
-    OverloadedStrings
+    DeriveDataTypeable
+  , OverloadedStrings
+  , RecordWildCards
+  , TemplateHaskell
   , UnicodeSyntax
   #-}
 -- |Entity tags
@@ -10,8 +13,8 @@ module Network.HTTP.Lucu.ETag
 
     , strongETag
     , weakETag
-    , eTagP
-    , eTagListP
+    , eTag
+    , eTagList
     )
     where
 import Control.Applicative
@@ -19,7 +22,10 @@ import Control.Monad
 import Data.Ascii (Ascii, AsciiBuilder)
 import qualified Data.Ascii as A
 import Data.Attoparsec.Char8
+import Data.Data
 import Data.Monoid.Unicode
+import Language.Haskell.TH.Syntax
+import Network.HTTP.Lucu.Parser
 import Network.HTTP.Lucu.Parser.Http hiding (token)
 import Network.HTTP.Lucu.Utils
 import Prelude.Unicode
@@ -33,7 +39,15 @@ data ETag = ETag {
       -- |An opaque string. Only characters from 0x20 (sp) to 0x7e (~)
       -- are allowed.
     , etagToken  ∷ !Ascii
-    } deriving (Eq, Show)
+    } deriving (Eq, Show, Data, Typeable)
+
+instance Lift ETag where
+    lift (ETag {..})
+        = [| ETag {
+               etagIsWeak = $(lift etagIsWeak)
+             , etagToken  = $(liftAscii etagToken)
+             }
+           |]
 
 -- |Convert an 'ETag' to an 'AsciiBuilder'.
 printETag ∷ ETag → AsciiBuilder
@@ -52,15 +66,9 @@ printETag et
 parseETag ∷ Ascii → ETag
 {-# INLINEABLE parseETag #-}
 parseETag str
-    = case parseOnly p $ A.toByteString str of
+    = case parseOnly (finishOff eTag) $ A.toByteString str of
         Right et → et
         Left err → error ("unparsable ETag: " ⧺ A.toString str ⧺ ": " ⧺ err)
-    where
-      p ∷ Parser ETag
-      {-# INLINE p #-}
-      p = do et ← eTagP
-             endOfInput
-             return et
 
 -- |This is equivalent to @'ETag' 'False'@. If you want to generate an
 -- ETag from a file, try using
@@ -75,16 +83,16 @@ weakETag ∷ Ascii → ETag
 weakETag = ETag True
 
 -- |'Parser' for an 'ETag'.
-eTagP ∷ Parser ETag
-{-# INLINEABLE eTagP #-}
-eTagP = do isWeak ← option False (string "W/" *> return True)
-           str    ← quotedStr
-           return $ ETag isWeak str
+eTag ∷ Parser ETag
+{-# INLINEABLE eTag #-}
+eTag = do isWeak ← option False (string "W/" *> return True)
+          str    ← quotedStr
+          return $ ETag isWeak str
 
 -- |'Parser' for a list of 'ETag's.
-eTagListP ∷ Parser [ETag]
-{-# INLINEABLE eTagListP #-}
-eTagListP = do xs ← listOf eTagP
-               when (null xs) $
-                   fail "empty list of ETags"
-               return xs
+eTagList ∷ Parser [ETag]
+{-# INLINEABLE eTagList #-}
+eTagList = do xs ← listOf eTag
+              when (null xs) $
+                  fail "empty list of ETags"
+              return xs