[libcxx-commits] [libcxx] [libc++] Fix {deque, vector}::append_range assuming too much about the types (PR #162438)

[Louis Dionne via libcxx-commits]

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@@ -489,7 +490,21 @@ class vector {
 #if _LIBCPP_STD_VER >= 23
   template <_ContainerCompatibleRange<_Tp> _Range>
   _LIBCPP_HIDE_FROM_ABI constexpr void append_range(_Range&& __range) {
-    insert_range(end(), std::forward<_Range>(__range));
+    if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) {
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ldionne wrote:

Do we have any tests with a sized input range? If not, can we add one?

https://github.com/llvm/llvm-project/pull/162438