dolphin/Source/Core/Common/VariantUtil.h

38 lines
709 B
C++

// Copyright 2018 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <variant>
namespace detail
{
template <typename... From>
struct VariantCastProxy
{
const std::variant<From...>& v;
template <typename... To>
operator std::variant<To...>() const
{
return std::visit([](auto&& arg) { return std::variant<To...>{arg}; }, v);
}
};
} // namespace detail
template <typename... From>
auto VariantCast(const std::variant<From...>& v)
{
return detail::VariantCastProxy<From...>{v};
}
template <class... Ts>
struct overloaded : Ts...
{
using Ts::operator()...;
};
template <class... Ts>
overloaded(Ts...) -> overloaded<Ts...>;