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Common: Add variant utilities

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This commit is contained in:
MerryMage 2018-10-15 21:00:44 +01:00
parent cb576bf382
commit 2dce7e6e21
2 changed files with 27 additions and 0 deletions
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1
Source/Core/Common/Common.vcxproj
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@ -159,6 +159,7 @@
<ClInclude Include="TraversalClient.h" /> <ClInclude Include="TraversalClient.h" />
<ClInclude Include="TraversalProto.h" /> <ClInclude Include="TraversalProto.h" />
<ClInclude Include="UPnP.h" /> <ClInclude Include="UPnP.h" />
<ClInclude Include="VariantUtil.h" />
<ClInclude Include="Version.h" /> <ClInclude Include="Version.h" />
<ClInclude Include="WorkQueueThread.h" /> <ClInclude Include="WorkQueueThread.h" />
<ClInclude Include="x64ABI.h" /> <ClInclude Include="x64ABI.h" />

26
Source/Core/Common/VariantUtil.h Normal file
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@ -0,0 +1,26 @@
// Copyright 2018 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#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};
}