[libcxx-commits] [libcxx] [libc++] Make `constexpr std::variant`. Implement P2231R1 (PR #83335)

[Mark de Wever via libcxx-commits]

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@@ -42,26 +42,27 @@ namespace std {
         in_place_index_t<I>, initializer_list<U>, Args&&...);
 
     // 20.7.2.2, destructor
-    ~variant();
+    constexpr ~variant();  // constexpr since c++20
 
     // 20.7.2.3, assignment
     constexpr variant& operator=(const variant&);
     constexpr variant& operator=(variant&&) noexcept(see below);
 
-    template <class T> variant& operator=(T&&) noexcept(see below);
+    template <class T>
+    constexpr variant& operator=(T&&) noexcept(see below); // constexpr since c++20
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mordante wrote:

nit: Can you try to align all `// constexpr since c++20` for all changes?

https://github.com/llvm/llvm-project/pull/83335