DiscordCoreAPI: [vcpkg] Compile error C2593

Hello, I’m a member of Microsoft VCPKG, when I built this port in an internal version of Visual Studio, it failed with following errors:

F:\vcpkg\buildtrees\discordcoreapi\src\8b54cf9-9e5ee11bfa\Source\FoundationEntities.cpp(42): error C2593: 'operator =' is ambiguous
F:\vcpkg\buildtrees\discordcoreapi\src\8b54cf9-9e5ee11bfa\Include\discordcoreapi/Etf.hpp(438): note: could be 'DiscordCoreInternal::EtfSerializer &DiscordCoreInternal::EtfSerializer::=<uint64_t>(_T0) noexcept'
        with
        [
            _T0=uint64_t
        ]

And the same error with gcc/clang.

For us, this is by design. The code is no longer well-formed after P2113R0.

All compilers reject the code (like: ‘S& operator=(C auto&& data) noexcept;’ works):

@RealTimeChris Can we find a solution? 😃