/*
 Copyright 2016-present The Material Motion Authors. All Rights Reserved.

 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.
 */

import Foundation

extension MotionObservableConvertible {

  /**
   Emit a constant value each time this operator receives a value.
   */
  public func rewriteTo<U>(_ value: U) -> MotionObservable<U> {
    return _map(#function, args: [value]) { _ in value }
  }

  /**
   Emit a constant value each time this operator receives a value.
   */
  public func rewriteTo<O: MotionObservableConvertible>(_ value: O) -> MotionObservable<O.T> {
    return _map(#function, args: [value]) { _ in value._read()! }
  }
}

/*
 Copyright 2016-present The Material Motion Authors. All Rights Reserved.

 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.
 */

import Foundation

extension MotionObservableConvertible {

  /**
   Emit a constant value each time this operator receives a value.
   */
  public func rewriteTo<U>(_ value: U) -> MotionObservable<U> {
    return _map(#function, args: [value]) { _ in value }
  }
}

--- 
+++ 
@@ -24,4 +24,11 @@
   public func rewriteTo<U>(_ value: U) -> MotionObservable<U> {
     return _map(#function, args: [value]) { _ in value }
   }
+
+  /**
+   Emit a constant value each time this operator receives a value.
+   */
+  public func rewriteTo<O: MotionObservableConvertible>(_ value: O) -> MotionObservable<O.T> {
+    return _map(#function, args: [value]) { _ in value._read()! }
+  }
 }
Add rewrite operator that accepts an observable.

Reviewers: O2 Material Motion, O4 Material Apple platform reviewers, #material_motion, chuga

Reviewed By: O4 Material Apple platform reviewers, chuga

Tags: #material_motion

Differential Revision: http://codereview.cc/D2896
