[libcxx-commits] [libcxx] [libc++] Optimize ranges::copy{, _n} for vector<bool>::iterator (PR #121013)

[Louis Dionne via libcxx-commits]

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@@ -59,6 +60,29 @@ struct TestInIters {
   }
 };
 
+template <std::size_t N>
+struct TestBitIter {
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ldionne wrote:

Let's write this as a simple function. The reason why `TestInIters` was written as a struct is just that we had to pass it to another function and lambdas are not available in some language modes, but this is clearer written as a function.

https://github.com/llvm/llvm-project/pull/121013