Introduce a single top-level test() function

Author: winner245

libcxx/test/std/algorithms/alg.modifying.operations/alg.swap/swap_ranges.pass.cpp

@@ -18,6 +18,7 @@
 #include <cassert>
 #include <memory>
 #include <utility>
+#include <__type_traits/is_constant_evaluated.h>
 
 #include "test_macros.h"
 #include "test_iterators.h"
@@ -67,12 +68,6 @@ struct TestUniquePtr {
     }
   };
 };
-
-// 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() {
-  types::for_each(types::forward_iterator_list<std::unique_ptr<int>*>(), TestUniquePtr());
-  return true;
-}
 #endif
 
 TEST_CONSTEXPR_CXX20 bool test_simple_cases() {
@@ -104,20 +99,25 @@ TEST_CONSTEXPR_CXX20 bool test_simple_cases() {
 TEST_CONSTEXPR_CXX20 bool test() {
   test_simple_cases();
   types::for_each(types::forward_iterator_list<int*>(), TestPtr());
+
+  if (std::__libcpp_is_constant_evaluated()) {
+#if TEST_STD_VER >= 23
+    types::for_each(types::forward_iterator_list<std::unique_ptr<int>*>(), TestUniquePtr());
+#endif
+  } else {
+#if TEST_STD_VER >= 11
+    types::for_each(types::forward_iterator_list<std::unique_ptr<int>*>(), TestUniquePtr());
+#endif
+  }
+
   return true;
 }
 
 int main(int, char**) {
   test();
-#if TEST_STD_VER >= 11
-  test_unique_ptr();
-#endif
 #if TEST_STD_VER >= 20
   static_assert(test());
 #endif
-#if TEST_STD_VER >= 23
-  static_assert(test_unique_ptr());
-#endif
 
   return 0;
 }