2 * Copyright 2014 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.
18 #include <gtest/gtest.h>
20 #include <folly/wangle/Future.h>
21 #include <folly/wangle/Executor.h>
23 using namespace folly::wangle;
25 using namespace testing;
27 typedef unique_ptr<int> A;
31 using EnableIfFuture = typename std::enable_if<isFuture<T>::value>::type;
34 using EnableUnlessFuture = typename std::enable_if<!isFuture<T>::value>::type;
37 Future<T> someFuture() {
38 return makeFuture(T());
41 template <class Ret, class... Params, typename = void>
42 Ret aFunction(Params...);
44 template <class Ret, class... Params>
45 typename std::enable_if<isFuture<Ret>::value, Ret>::type
46 aFunction(Params...) {
47 typedef typename Ret::value_type T;
48 return makeFuture(T());
51 template <class Ret, class... Params>
52 typename std::enable_if<!isFuture<Ret>::value, Ret>::type
53 aFunction(Params...) {
57 template <class Ret, class... Params>
58 std::function<Ret(Params...)>
60 typename std::enable_if<!isFuture<Ret>::value, bool>::type = false) {
61 return [](Params...) -> Ret { return Ret(); };
64 template <class Ret, class... Params>
65 std::function<Ret(Params...)>
66 aStdFunction(typename std::enable_if<isFuture<Ret>::value, bool>::type = true) {
67 typedef typename Ret::value_type T;
68 return [](Params...) -> Future<T> { return makeFuture(T()); };
74 template <class Ret, class... Params>
75 static Ret aStaticMethod(Params...);
77 template <class Ret, class... Params>
79 typename std::enable_if<!isFuture<Ret>::value, Ret>::type
80 aStaticMethod(Params...) {
84 template <class Ret, class... Params>
86 typename std::enable_if<isFuture<Ret>::value, Ret>::type
87 aStaticMethod(Params...) {
88 typedef typename Ret::value_type T;
89 return makeFuture(T());
92 template <class Ret, class... Params>
93 Ret aMethod(Params...);
95 template <class Ret, class... Params>
96 typename std::enable_if<!isFuture<Ret>::value, Ret>::type
101 template <class Ret, class... Params>
102 typename std::enable_if<isFuture<Ret>::value, Ret>::type
104 typedef typename Ret::value_type T;
105 return makeFuture(T());