':' is optional in parsing ISO format (not strictly ISO though)

Author: ondrap

src/Data/Thyme/Format/DateFast.hs

@@ -11,7 +11,7 @@ module Data.Thyme.Format.DateFast (
 import           Control.Applicative
 #endif
 import           Control.Lens        (from, view)
-import           Control.Monad       (unless, void)
+import           Control.Monad       (unless, when, void)
 import qualified Data.ByteString     as BS
 import           Data.Int            (Int64)
 import           Data.List           (foldl1')
@@ -71,7 +71,9 @@ parseNumber4 = do -- Specialized version for 2 digits
 toffset :: Scanner Int64
 toffset = do
   hours <- parseNumber2
-  S.char8 ':'
+  -- optional ':'
+  colon <- S.lookAheadChar8
+  when (colon == Just ':') (S.char8 ':')
   minutes <- parseNumber2
   return $ fromIntegral $ hours * 3600 + minutes * 60
 {-# INLINE toffset #-}

thyme.cabal

@@ -105,6 +105,7 @@ library
         vector-th-unbox >= 0.2.1.0,
         vector-space >= 0.8,
         scanner
+    build-tools: hsc2hs
     if os(windows)
         build-depends: Win32
     if os(darwin) || os(freebsd)