[libcxx-commits] [libcxx] [libc++] Refactor swap_ranges dispatching (PR #173384)

[Louis Dionne via libcxx-commits]

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@@ -728,6 +728,157 @@ struct __specialized_algorithm<_Algorithm::__copy,
   }
 };
 
+template <class _Cl, class _Cr>
+struct __specialized_algorithm<_Algorithm::__swap_ranges,
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ldionne wrote:

I would like us to add a libc++ specific test for `vector<bool>` that ensures that `__specialized_algorithm<Foo, std::vector<bool>::iterator, ...>::__has_algorithm` is true. Otherwise, at the moment I believe all of our tests would pass if we made a typo in e.g. the `__iterator_pair` specialization below, or forgot to add `__has_algorithm = true`.

https://github.com/llvm/llvm-project/pull/173384