[lld] [clang] [llvm] [compiler-rt] [openmp] [lldb] [clang-tools-extra] [flang] [libc] [libcxx] [libc++][variant] P2637R3: Member `visit` (`std::variant`) (PR #76447)

[Mark de Wever via cfe-commits]

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@@ -1130,6 +1137,19 @@ using __best_match_t = typename invoke_result_t<_MakeOverloads<_Types...>, _Tp,
 
 } // namespace __variant_detail
 
+template < class _Visitor, class... _Vs, typename = void_t<decltype(std::__as_variant(std::declval<_Vs>()))...> >
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mordante wrote:

Clang-format needs to be compatible with C++03, but this is C++17 so we can remove some spaces.
```suggestion
template <class _Visitor, class... _Vs, typename = void_t<decltype(std::__as_variant(std::declval<_Vs>()))...>>
```

https://github.com/llvm/llvm-project/pull/76447