[libcxx-commits] [libcxx] [libc++] Treat negative counts in copy_n & friends as no-ops (PR #207086)

[Nikolas Klauser via libcxx-commits]

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@@ -63,14 +63,15 @@ _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
 copy_n(_InputIterator __first, _Size __n, _OutputIterator __result) {
   using _IntegralSize       = decltype(std::__convert_to_integral(__n));
   _IntegralSize __converted = __n;
-  if (__converted > 0) {
+  if (__converted < 0) [[__unlikely__]]
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philnik777 wrote:

```suggestion
  if (__converted < 0)
```
Or does this actually make a difference somewhere? Same throughout.

https://github.com/llvm/llvm-project/pull/207086