[libcxx-commits] [libcxx] [libc++] Introduce a escape hatch for the changed behavior of map and set search operations (PR #183190)

[Louis Dionne via libcxx-commits]

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@@ -117,6 +117,13 @@ Potentially breaking changes
   first element being returned from ``find`` will be broken, and ``lower_bound`` or ``equal_range`` should be used
   instead.
 
+- The algorithms for ``std::map`` and ``std::set`` lookup operations (``lower_bound``, ``find``, etc) were modified such
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ldionne wrote:

While we did apply the same optimization to `map::find`, I am not able to reproduce the same change in behavior. So I think we might only want to document that the behavior of `lower_bound` and `upper_bound` changed.

https://github.com/llvm/llvm-project/pull/183190