[libcxx-commits] [libcxx] [libc++] Implement P1901R2: owner_hash and owner_equal for shared_ptr/weak_ptr (PR #210551)

[Hristo Hristov via libcxx-commits]

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@@ -817,6 +823,32 @@ struct owner_less<void>
     typedef void is_transparent;
 };
 
+// class owner_hash:                                                          // C++26
+struct owner_hash
+{
+    template <class _Tp>
+    size_t operator()(shared_ptr<_Tp> const& __p) const noexcept;
+    template <class _Tp>
+    size_t operator()(weak_ptr<_Tp> const& __p) const noexcept;
+
+    typedef void is_transparent;
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Zingam wrote:

The synopsis should be copied from the standard preferably.

https://github.com/llvm/llvm-project/pull/210551