[libcxx-commits] [libcxx] [libc++][test] Refactor tests for ranges::swap_range algorithms (PR #121138)

[Louis Dionne via libcxx-commits]

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@@ -51,72 +47,115 @@ auto can_swap_test(...) -> std::false_type;
 
 template <class Tp>
 constexpr bool can_swap() {
-    return std::is_same<decltype(can_swap_test<Tp>(0)), void>::value;
+  return std::is_same<decltype(can_swap_test<Tp>(0)), void>::value;
 }
 #endif
 
-#if TEST_STD_VER > 17
-constexpr bool test_swap_constexpr()
-{
+#if TEST_STD_VER >= 11
+// This test is constexpr only since C++23 because constexpr std::unique_ptr is only available since C++23
+TEST_CONSTEXPR_CXX23 bool test_unique_ptr() {
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ldionne wrote:

You can actually inline this into `test` below and use the `IS_CONSTANT_EVALUATED` trick to only run that part of the function when it can be run. That will simplify your `main()`.

https://github.com/llvm/llvm-project/pull/121138