[libcxx-commits] [libcxx] [libc++][NFC] Use `if constexpr` instead of SFINAE to simplify shared_ptr (PR #113495)

[Louis Dionne via libcxx-commits]

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@@ -252,45 +252,34 @@ template <class _Tp, class _Alloc>
 struct __shared_ptr_emplace : __shared_weak_count {
   using __value_type = __remove_cv_t<_Tp>;
 
-  template <class... _Args,
-            class _Allocator                                                                         = _Alloc,
-            __enable_if_t<is_same<typename _Allocator::value_type, __for_overwrite_tag>::value, int> = 0>
+  template <class... _Args>
   _LIBCPP_HIDE_FROM_ABI explicit __shared_ptr_emplace(_Alloc __a, _Args&&...) : __storage_(std::move(__a)) {
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ldionne wrote:

Thanks, I revived this patch from an old local branch I had and went a bit fast.

https://github.com/llvm/llvm-project/pull/113495