WhisperCom/include/internal/benchmark/catch_constructor.hpp
Dominik Meyer 9266232d41 Squashed 'libs/Catch2/' content from commit a05a54ec
git-subtree-dir: libs/Catch2
git-subtree-split: a05a54ec25d2854b27afd38afa605fa6e3a36430
2021-08-19 17:00:44 +02:00

80 lines
2.5 KiB
C++

/*
* Created by Joachim on 16/04/2019.
* Adapted from donated nonius code.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
// Constructor and destructor helpers
#ifndef TWOBLUECUBES_CATCH_CONSTRUCTOR_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_CONSTRUCTOR_HPP_INCLUDED
#include <type_traits>
namespace Catch {
namespace Benchmark {
namespace Detail {
template <typename T, bool Destruct>
struct ObjectStorage
{
using TStorage = typename std::aligned_storage<sizeof(T), std::alignment_of<T>::value>::type;
ObjectStorage() : data() {}
ObjectStorage(const ObjectStorage& other)
{
new(&data) T(other.stored_object());
}
ObjectStorage(ObjectStorage&& other)
{
new(&data) T(std::move(other.stored_object()));
}
~ObjectStorage() { destruct_on_exit<T>(); }
template <typename... Args>
void construct(Args&&... args)
{
new (&data) T(std::forward<Args>(args)...);
}
template <bool AllowManualDestruction = !Destruct>
typename std::enable_if<AllowManualDestruction>::type destruct()
{
stored_object().~T();
}
private:
// If this is a constructor benchmark, destruct the underlying object
template <typename U>
void destruct_on_exit(typename std::enable_if<Destruct, U>::type* = 0) { destruct<true>(); }
// Otherwise, don't
template <typename U>
void destruct_on_exit(typename std::enable_if<!Destruct, U>::type* = 0) { }
T& stored_object() {
return *static_cast<T*>(static_cast<void*>(&data));
}
T const& stored_object() const {
return *static_cast<T*>(static_cast<void*>(&data));
}
TStorage data;
};
}
template <typename T>
using storage_for = Detail::ObjectStorage<T, true>;
template <typename T>
using destructable_object = Detail::ObjectStorage<T, false>;
}
}
#endif // TWOBLUECUBES_CATCH_CONSTRUCTOR_HPP_INCLUDED