Adding Effect#noop back, it's just too convenient

jnape · jnape · commit c0752977a98a · 2019-05-13T17:46:21.000-05:00
diff --git a/src/main/java/com/jnape/palatable/lambda/functions/Effect.java b/src/main/java/com/jnape/palatable/lambda/functions/Effect.java
@@ -10,6 +10,7 @@
 
 import static com.jnape.palatable.lambda.adt.Unit.UNIT;
 import static com.jnape.palatable.lambda.functions.builtin.fn1.Constantly.constantly;
+import static com.jnape.palatable.lambda.functions.specialized.SideEffect.NOOP;
 import static com.jnape.palatable.lambda.io.IO.io;
 
 /**
@@ -90,6 +91,16 @@ static Effect<Unit> effect(SideEffect sideEffect) {
         return effect(constantly(io(sideEffect)));
     }
 
+    /**
+     * Create an {@link Effect} that accepts an input and does nothing;
+     *
+     * @return the noop {@link Effect}
+     */
+    @SuppressWarnings("unused")
+    static <A> Effect<A> noop() {
+        return effect(NOOP).contraMap(constantly(UNIT));
+    }
+
     /**
      * Create an {@link Effect} from an {@link Fn1} that yields an {@link IO}.
      *
diff --git a/src/main/java/com/jnape/palatable/lambda/functions/specialized/SideEffect.java b/src/main/java/com/jnape/palatable/lambda/functions/specialized/SideEffect.java
@@ -17,7 +17,7 @@ public interface SideEffect {
     /**
      * A no-op {@link SideEffect}
      */
-    @SuppressWarnings("unused") SideEffect NOOP = () -> {};
+    SideEffect NOOP = () -> {};
 
     @SuppressWarnings("NonAsciiCharacters")
     void Ω() throws Throwable;
