[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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@@ -63,6 +64,7 @@ __for_each_n(_InputIterator __first, _Size __orig_n, _Func&& __f, _Proj& __proj)
 template <class _InputIterator, class _Size, class _Func>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _InputIterator
 for_each_n(_InputIterator __first, _Size __orig_n, _Func __f) {
+  _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__orig_n >= 0, "for_each_n requires a non-negative count");
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philnik777 wrote:

Should there be an LWG issue about this inconsistency?

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