2 * Copyright 2017 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.
22 template <typename... Ts>
24 template <typename... Ts2>
25 static std::tuple<Ts...> unwrap(
26 std::tuple<folly::Try<Ts>...>&& o,
29 sizeof...(ts2) < std::tuple_size<std::tuple<folly::Try<Ts>...>>::value,
30 "Non-templated unwrap should be used instead");
34 std::forward<Ts2>(ts2)...,
35 std::move(*std::get<sizeof...(ts2)>(o)));
38 static std::tuple<Ts...> unwrap(
39 std::tuple<folly::Try<Ts>...>&& /* o */,
41 return std::tuple<Ts...>(std::forward<Ts>(ts)...);