make use of the purescript-read lib instead of FromString class

bower.json

@@ -25,9 +25,13 @@
     "url": "git://github.com/truqu/purescript-indexedDB.git"
   },
   "dependencies": {
-    "purescript-maybe": "^3.0.0",
     "purescript-aff": "^3.1.0",
-    "purescript-datetime": "^3.2.0"
+    "purescript-datetime": "^3.2.0",
+    "purescript-eff": "^3.1.0",
+    "purescript-exceptions": "https://github.com/truqu/purescript-exceptions.git#3.1.0",
+    "purescript-maybe": "^3.0.0",
+    "purescript-prelude": "^3.1.0",
+    "purescript-read": "^1.0.0"
   },
   "devDependencies": {
     "purescript-spec": "^1.0.0",

src/Database/IndexedDB/Core.purs

@@ -8,8 +8,7 @@
 -- | by the API.
 
 module Database.IndexedDB.Core
-  ( class FromString, parse
-  , IDB
+  ( IDB
   , CursorDirection(..)
   , CursorSource(..)
   , Database
@@ -28,6 +27,7 @@ import Prelude                     (class Show)
 
 import Control.Monad.Eff           (kind Effect)
 import Data.Maybe                  (Maybe(..))
+import Data.String.Read            (class Read)
 
 import Database.IndexedDB.IDBKey
 
@@ -109,11 +109,6 @@ foreign import data Transaction :: Type
 foreign import data ValueCursor :: Type
 
 
--- | FromString represents enumerations that can be represented as Strings.
-class FromString a where
-  parse :: String -> Maybe a
-
-
 foreign import _showCursor :: forall cursor. cursor -> String
 instance showKeyCursor :: Show KeyCursor where
   show = _showCursor
@@ -175,8 +170,8 @@ instance showTransactionMode :: Show TransactionMode where
       VersionChange -> "versionchange"
 
 
-instance fromStringCursorDirection :: FromString CursorDirection where
-  parse s =
+instance readCursorDirection :: Read CursorDirection where
+  read s =
     case s of
       "next"       -> Just Next
       "nextunique" -> Just NextUnique
@@ -185,8 +180,8 @@ instance fromStringCursorDirection :: FromString CursorDirection where
       _            -> Nothing
 
 
-instance fromStringTransactionMode :: FromString TransactionMode where
-  parse s =
+instance readTransactionMode :: Read TransactionMode where
+  read s =
     case s of
       "readonly"      -> Just ReadOnly
       "readwrite"     -> Just ReadWrite

src/Database/IndexedDB/IDBCursor.purs

@@ -16,11 +16,12 @@ module Database.IndexedDB.IDBCursor
 import Prelude                            (Unit, ($), (>>>), map)
 
 import Control.Monad.Aff                  (Aff)
+import Data.Foreign                       (Foreign, toForeign, unsafeFromForeign)
 import Data.Function.Uncurried             as Fn
 import Data.Function.Uncurried            (Fn2, Fn3)
 import Data.Maybe                         (Maybe)
 import Data.Nullable                      (Nullable, toNullable)
-import Data.Foreign                       (Foreign, toForeign, unsafeFromForeign)
+import Data.String.Read                   (read)
 
 import Database.IndexedDB.Core
 import Database.IndexedDB.IDBKey.Internal (class IDBKey, Key(..), toKey, extractForeign)
@@ -80,7 +81,7 @@ direction'
   :: KeyCursor
   -> CursorDirection
 direction' =
-  Fn.runFn2 _direction (parse >>> toNullable)
+  Fn.runFn2 _direction (read >>> toNullable)
 
 
 -- | Returns the key of the cursor. Throws a "InvalidStateError" DOMException
@@ -122,7 +123,7 @@ direction
   :: ValueCursor
   -> CursorDirection
 direction =
-  Fn.runFn2 _direction (parse >>> toNullable)
+  Fn.runFn2 _direction (read >>> toNullable)
 
 
 -- | Returns the key of the cursor. Throws a "InvalidStateError" DOMException