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.
17 #ifndef FOLLY_EXCEPTIONWRAPPER_H
18 #define FOLLY_EXCEPTIONWRAPPER_H
22 #include "folly/detail/ExceptionWrapper.h"
26 class exception_wrapper {
28 exception_wrapper() : throwfn_(nullptr) { }
30 void throwException() {
32 throwfn_(item_.get());
36 std::exception* get() {
41 std::shared_ptr<std::exception> item_;
42 void (*throwfn_)(void*);
44 template <class T, class... Args>
45 friend exception_wrapper make_exception_wrapper(Args... args);
48 template <class T, class... Args>
49 exception_wrapper make_exception_wrapper(Args... args) {
51 ew.item_ = std::make_shared<T>(std::forward<Args>(args)...);
52 ew.throwfn_ = folly::detail::thrower<T>::doThrow;