diff options
Diffstat (limited to 'Types/UUID.hs')
| -rw-r--r-- | Types/UUID.hs | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/Types/UUID.hs b/Types/UUID.hs index f7232d0b9..767cd0dfe 100644 --- a/Types/UUID.hs +++ b/Types/UUID.hs @@ -9,13 +9,12 @@ module Types.UUID where -- A UUID is either an arbitrary opaque string, or UUID info may be missing. data UUID = NoUUID | UUID String - deriving (Eq, Ord) + deriving (Eq, Ord, Show) -instance Show UUID where - show (UUID u) = u - show NoUUID = "" +fromUUID :: UUID -> String +fromUUID (UUID u) = u +fromUUID NoUUID = "" -instance Read UUID where - readsPrec _ s - | null s = [(NoUUID, "")] - | otherwise = [(UUID s, "")] +toUUID :: String -> UUID +toUUID [] = NoUUID +toUUID s = UUID s |