86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2015 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef TEMPLATE_H
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#define TEMPLATE_H
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#include "nghttp2_config.h"
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#include <memory>
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#include <array>
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#include <functional>
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namespace nghttp2 {
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template <typename T, typename... U>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(U &&... u) {
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return std::unique_ptr<T>(new T(std::forward<U>(u)...));
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}
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template <typename T>
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typename std::enable_if<std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(size_t size) {
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return std::unique_ptr<T>(new typename std::remove_extent<T>::type[size]());
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}
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template <typename T, typename... Rest>
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std::array<T, sizeof...(Rest)+1> make_array(T &&t, Rest &&... rest) {
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return std::array<T, sizeof...(Rest)+1>{
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{std::forward<T>(t), std::forward<Rest>(rest)...}};
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}
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template <typename T, size_t N> constexpr size_t array_size(T (&)[N]) {
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return N;
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}
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template <typename T, size_t N> constexpr size_t str_size(T (&)[N]) {
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return N - 1;
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}
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// inspired by <http://blog.korfuri.fr/post/go-defer-in-cpp/>, but our
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// template can take functions returning other than void.
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template <typename F, typename... T> struct Defer {
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Defer(F &&f, T &&... t)
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: f(std::bind(std::forward<F>(f), std::forward<T>(t)...)) {}
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Defer(Defer &&o) : f(std::move(o.f)) {}
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~Defer() { f(); }
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using ResultType = typename std::result_of<
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typename std::decay<F>::type(typename std::decay<T>::type...)>::type;
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std::function<ResultType()> f;
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};
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template <typename F, typename... T> Defer<F, T...> defer(F &&f, T &&... t) {
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return Defer<F, T...>(std::forward<F>(f), std::forward<T>(t)...);
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}
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template <typename T, typename F> bool test_flags(T t, F flags) {
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return (t & flags) == flags;
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}
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} // namespace nghttp2
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#endif // TEMPLATE_H
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