[libcxx-commits] [libcxx] [libc++] Implement `std::function_ref` (PR #186692)

[Louis Dionne via libcxx-commits]

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@@ -73,6 +73,13 @@ void test_iterator_sentinel() {
     assert(s.size() == 1);
     assert(s.data() == std::data(arr));
   }
+
+  {
+    std::span s{std::begin(arr), std::cw<3>};
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ldionne wrote:

Why is this part of this PR?

https://github.com/llvm/llvm-project/pull/186692