[libcxx-commits] [libcxx] [libc++] Flat containers should reject `vector<bool, Alloc>` (PR #224886)

[Hristo Hristov via libcxx-commits]

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@@ -24,6 +24,12 @@ class vector;
 template <class _Allocator>
 class vector<bool, _Allocator>;
 
+template <class _Tp>
+inline constexpr bool __is_vector_bool_v  = false;
+
+template <class _Allocator>
+inline constexpr bool __is_vector_bool_v<vector<bool, _Allocator>> = true;
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Zingam wrote:

Since these aren't used anywhere else right now. I'd go with `#if _LIBCPP_STD_VER >= 23` for now.

https://github.com/llvm/llvm-project/pull/224886