Add idT, the identity monad transformer

typelevel · Oct 27, 2015 · b4cb771 · b4cb771
1 parent 1671a8d
commit b4cb771
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/core/src/main/scala/cats/data/package.scala b/core/src/main/scala/cats/data/package.scala
@@ -34,6 +34,11 @@ package object data {
       }
   }
 
+  type IdT[M[_], A] = M[A]
+  object IdT {
+    def apply[M[_], A](ma: M[A]): IdT[M, A] = ma
+  }
+
   type ReaderT[F[_], A, B] = Kleisli[F, A, B]
   val ReaderT = Kleisli