dolphin/Source/Core/Common/Compat/in_place.h

// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

// MPark.Variant
//
// Copyright Michael Park, 2015-2017
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)

#include <cstddef>

namespace mpark
{
struct in_place_t
{
  explicit in_place_t() = default;
};

template <std::size_t I>
struct in_place_index_t
{
  explicit in_place_index_t() = default;
};

template <typename T>
struct in_place_type_t
{
  explicit in_place_type_t() = default;
};

#ifdef MPARK_VARIABLE_TEMPLATES
constexpr in_place_t in_place{};

template <std::size_t I>
constexpr in_place_index_t<I> in_place_index{};

template <typename T>
constexpr in_place_type_t<T> in_place_type{};
#endif

}  // namespace mpark