From c4bc2c9ba6dfededf879a22ebf827ad2e4b485ed Mon Sep 17 00:00:00 2001
From: Denis Zharkov <denis.zharkov@jetbrains.com>
Date: Fri, 27 Nov 2015 21:06:19 +0300
Subject: [PATCH] J2K Renderer: convert and make contravariant

---
 .../src/org/jetbrains/kotlin/renderer/Renderer.kt   | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/core/descriptors/src/org/jetbrains/kotlin/renderer/Renderer.kt b/core/descriptors/src/org/jetbrains/kotlin/renderer/Renderer.kt
index e0efa96a459..222bad1ef21 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/renderer/Renderer.kt
+++ b/core/descriptors/src/org/jetbrains/kotlin/renderer/Renderer.kt
@@ -14,11 +14,12 @@
  * limitations under the License.
  */
 
-package org.jetbrains.kotlin.renderer;
+package org.jetbrains.kotlin.renderer
 
-import org.jetbrains.annotations.NotNull;
-
-public interface Renderer<O> {
-    @NotNull
-    String render(@NotNull O object);
+public interface Renderer<in O> {
+    fun render(obj: O): String
+}
+
+fun <O> Renderer(block: (O) -> String) = object : Renderer<O> {
+    override fun render(obj: O) = block(obj)
 }