[libcxx-commits] [libcxx] Optimize __assign_with_sentinel in std::vector (PR #113852)

[Peng Liu via libcxx-commits]

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@@ -48,6 +48,76 @@ void BM_Assignment(benchmark::State& st, Container) {
   }
 }
 
+// Wrap any Iterator into an input iterator
+template <typename Iterator>
+class InputIterator {
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winner245 wrote:

Exactly. This `InputIterator` wrapper class ensures that `vector::assign(_InputIterator, _InputIterator)` invokes `__assign_with_sentinel`, not `__assign_with_size`. 

https://github.com/llvm/llvm-project/pull/113852