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e197b10b96
VisitVariant allows one to use a generic lambda to visit a boost::variant. This is necessary because boost::visit_variant requires the visitor type to provide a return type.
34 lines
847 B
C++
34 lines
847 B
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2016 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#pragma once
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#include <boost/variant.hpp>
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namespace Dynarmic {
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namespace Common {
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namespace detail {
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template <typename ReturnT, typename Lambda>
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struct VariantVisitor : boost::static_visitor<ReturnT>, Lambda {
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VariantVisitor(Lambda&& lambda)
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: Lambda(std::move(lambda))
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{}
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using Lambda::operator();
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};
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} // namespace detail
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template<typename ReturnT, typename Variant, typename Lambda>
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inline ReturnT VisitVariant(Variant&& variant, Lambda&& lambda) {
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return boost::apply_visitor(detail::VariantVisitor<ReturnT, Lambda>(std::move(lambda)), variant);
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}
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} // namespace Common
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} // namespace Dynarmic
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