[libcxx-commits] [libcxx] [libc++] Remove initializer_list specific optimization in __tree (PR #169413)

[Louis Dionne via libcxx-commits]

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@@ -1015,7 +1015,8 @@ public:
 #    endif
 
   _LIBCPP_HIDE_FROM_ABI map& operator=(initializer_list<value_type> __il) {
-    __tree_.__assign_unique(__il.begin(), __il.end());
+    clear();
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ldionne wrote:

It seems you're right. Neither https://eel.is/c++draft/container.requirements#container.reqmts-66 nor any of the referenced clauses specify something. So that must be the basic exception safety guarantee.

https://github.com/llvm/llvm-project/pull/169413