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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
// Adapted from donated nonius code.
#ifndef CATCH_CONSTRUCTOR_HPP_INCLUDED
#define CATCH_CONSTRUCTOR_HPP_INCLUDED
#include <catch2/internal/catch_move_and_forward.hpp>
#include <type_traits>
namespace Catch {
namespace Benchmark {
namespace Detail {
template <typename T, bool Destruct>
struct alignas(alignof(T)) ObjectStorage
{
ObjectStorage() = default;
ObjectStorage(const ObjectStorage& other)
{
new(&data) T(other.stored_object());
}
ObjectStorage(ObjectStorage&& other)
{
new(data) T(CATCH_MOVE(other.stored_object()));
}
~ObjectStorage() { destruct_on_exit<T>(); }
template <typename... Args>
void construct(Args&&... args)
{
new (data) T(CATCH_FORWARD(args)...);
}
template <bool AllowManualDestruction = !Destruct>
std::enable_if_t<AllowManualDestruction> destruct()
{
stored_object().~T();
}
private:
// If this is a constructor benchmark, destruct the underlying object
template <typename U>
void destruct_on_exit(std::enable_if_t<Destruct, U>* = nullptr) { destruct<true>(); }
// Otherwise, don't
template <typename U>
void destruct_on_exit(std::enable_if_t<!Destruct, U>* = nullptr) { }
#if defined( __GNUC__ ) && __GNUC__ <= 6
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wstrict-aliasing"
#endif
T& stored_object() { return *reinterpret_cast<T*>( data ); }
T const& stored_object() const {
return *reinterpret_cast<T const*>( data );
}
#if defined( __GNUC__ ) && __GNUC__ <= 6
# pragma GCC diagnostic pop
#endif
alignas( alignof(T) ) unsigned char data[sizeof( T )]{};
};
} // namespace Detail
template <typename T>
using storage_for = Detail::ObjectStorage<T, true>;
template <typename T>
using destructable_object = Detail::ObjectStorage<T, false>;
} // namespace Benchmark
} // namespace Catch
#endif // CATCH_CONSTRUCTOR_HPP_INCLUDED
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