Introduce coroutine-related API into built-ins

core/builtins/src/kotlin/Coroutines.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package kotlin.coroutines
+
+/**
+ * Interface representing a continuation after a suspension point that returns value of type `P`
+ */
+interface Continuation<in P> {
+    /**
+     * Resumes the execution of the corresponding coroutine passing `data` as the return value of the last suspension point
+     */
+    fun resume(data: P)
+
+    /**
+     * Resumes the execution of the corresponding coroutine so that the `exception` is re-thrown right after the
+     * last suspension point
+     */
+    fun resumeWithException(exception: Throwable)
+}