moved decodeUTF8 into helpers section

ChangeLog.md

@@ -2,3 +2,4 @@
 
 ## Unreleased changes
 - changed the types of encodeCSV and encodeRawCSV to make them more generic
+- slight re-structuring of documentation

src/Data/CSV/Sip.hs

@@ -52,8 +52,9 @@ module Data.CSV.Sip (
   labelFields,
   decodeRows,
   decodeRawRows,
-  decodeUTF8,
   toBytes,
+  -- * Helper Functions
+  decodeUTF8,
 ) where
 
 import Conduit
@@ -211,12 +212,6 @@ decodeRows = decodeRawRows .| mapC (map $ fromMaybe "" . decodeUTF8)
 decodeRawRows :: Monad m => ConduitT BS.ByteString [BS.ByteString] m ()
 decodeRawRows = toBytes .| evalStateT decodeLoop newDecodeState
 
--- | decode a raw ByteString into Text (if possible)
-decodeUTF8 :: BS.ByteString -> Maybe T.Text
-decodeUTF8 bs = case decodeUtf8' bs of
-  Left _    -> Nothing
-  Right txt -> Just txt
-
 -- | convert a stream to ByteStrings to a stream of bytes
 toBytes :: Monad m => ConduitT BS.ByteString Word8 m ()
 toBytes = await >>= \case
@@ -226,6 +221,12 @@ toBytes = await >>= \case
     toBytes
   Nothing -> return ()
 
+-- | decode a raw ByteString into Text (if possible)
+decodeUTF8 :: BS.ByteString -> Maybe T.Text
+decodeUTF8 bs = case decodeUtf8' bs of
+  Left _    -> Nothing
+  Right txt -> Just txt
+
 -- Internal
 
 data DecodeState = DecodeState

test/Data/CSV/SipSpec.hs

@@ -40,8 +40,8 @@ spec = describe "Data.CSV.Sip" $ do
   labelFieldsSpec
   decodeRowsSpec
   decodeRawRowsSpec
-  decodeUTF8Spec
   toBytesSpec
+  decodeUTF8Spec
 
 encodeCSVSpec :: Spec
 encodeCSVSpec = describe "encodeCSV" $ do
@@ -327,6 +327,14 @@ decodeRawRowsSpec = describe "decodeRawRows" $ mapM_
       , ["baz", "quux"]
       ]
 
+toBytesSpec :: Spec
+toBytesSpec = describe "toBytes" $ let
+  input    = ["ab", "cd"]
+  expected = map (fromIntegral . ord) "abcd"
+  in it ("should be " ++ show expected) $ do
+    result <- runConduit $ sourceList input .| toBytes .| consume
+    result `shouldBe` expected
+
 decodeUTF8Spec :: Spec
 decodeUTF8Spec = describe "decodeUTF8" $ mapM_
   ( \(label, input, expected) -> context label $
@@ -341,12 +349,4 @@ decodeUTF8Spec = describe "decodeUTF8" $ mapM_
   , ( "blank",        "",         Just ""      )
   ]
 
-toBytesSpec :: Spec
-toBytesSpec = describe "toBytes" $ let
-  input    = ["ab", "cd"]
-  expected = map (fromIntegral . ord) "abcd"
-  in it ("should be " ++ show expected) $ do
-    result <- runConduit $ sourceList input .| toBytes .| consume
-    result `shouldBe` expected
-
 --jl