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e149ad4f0aSPDX standardizes how source code conveys its copyright and licensing information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX tags are adopted in many large projects, including things like the Linux kernel.
36 lines
686 B
C++
36 lines
686 B
C++
// Copyright 2018 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <variant>
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namespace detail
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{
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template <typename... From>
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struct VariantCastProxy
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{
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const std::variant<From...>& v;
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template <typename... To>
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operator std::variant<To...>() const
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{
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return std::visit([](auto&& arg) { return std::variant<To...>{arg}; }, v);
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}
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};
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} // namespace detail
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template <typename... From>
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auto VariantCast(const std::variant<From...>& v)
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{
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return detail::VariantCastProxy<From...>{v};
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}
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template <class... Ts>
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struct overloaded : Ts...
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{
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using Ts::operator()...;
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};
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template <class... Ts>
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overloaded(Ts...) -> overloaded<Ts...>;
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