-/*
- * Copyright 2017 Facebook, Inc.
- *
- * 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.
- */
-
-#pragma once
-
-namespace folly {
-namespace detail {
-
-template <typename... Ts>
-struct TryTuple {
- template <typename... Ts2>
- static std::tuple<Ts...> unwrap(
- std::tuple<folly::Try<Ts>...>&& o,
- Ts2&&... ts2) {
- static_assert(
- sizeof...(ts2) < std::tuple_size<std::tuple<folly::Try<Ts>...>>::value,
- "Non-templated unwrap should be used instead");
-
- return unwrap(
- std::move(o),
- std::forward<Ts2>(ts2)...,
- std::move(*std::get<sizeof...(ts2)>(o)));
- }
-
- static std::tuple<Ts...> unwrap(
- std::tuple<folly::Try<Ts>...>&& /* o */,
- Ts&&... ts) {
- return std::tuple<Ts...>(std::forward<Ts>(ts)...);
- }
-};
-
-} // namespace detail
-} // namespace folly