[libcxx-commits] [libcxx] [libc++] Optimize ranges::for_each for iterating over __trees (PR #164405)

[Louis Dionne via libcxx-commits]

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@@ -944,6 +948,21 @@ template <class _Key, class _Allocator, class = enable_if_t<__is_allocator_v<_Al
 set(initializer_list<_Key>, _Allocator) -> set<_Key, less<_Key>, _Allocator>;
 #  endif
 
+#  if _LIBCPP_STD_VER >= 14
+template <class _Alg, class _Key, class _Compare, class _Allocator>
+struct __specialized_algorithm<_Alg, set<_Key, _Compare, _Allocator>> {
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ldionne wrote:

I have a bad feeling about forwarding to tree generically for any algorithm. Seems like something that could bite us in the future if we're not careful. But since I can't articulate a concrete concern, not requesting any change.

https://github.com/llvm/llvm-project/pull/164405