2 * Copyright 2015 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <folly/wangle/rx/types.h> // must come first
20 #include <folly/wangle/rx/Observable.h>
21 #include <folly/wangle/rx/Observer.h>
23 namespace folly { namespace wangle {
25 /// Subject interface. A Subject is both an Observable and an Observer. There
26 /// is a default implementation of the Observer methods that just forwards the
27 /// observed events to the Subject's observers.
29 struct Subject : public Observable<T>, public Observer<T> {
30 void onNext(const T& val) override {
31 this->forEachObserver([&](Observer<T>* o){
35 void onError(Error e) override {
36 this->forEachObserver([&](Observer<T>* o){
40 void onCompleted() override {
41 this->forEachObserver([](Observer<T>* o){