Implement P0505: 'Wording for GB 50'

llvm-svn: 291028

1 files changed, 17 insertions, 0 deletions

diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.arithmetic/op_times=.pass.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.arithmetic/op_times=.pass.cpp
index b97534a3615..0f76788c00e 100644
--- a/libcxx/test/std/utilities/time/time.duration/time.duration.arithmetic/op_times=.pass.cpp
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.arithmetic/op_times=.pass.cpp
@@ -16,9 +16,26 @@
 #include <chrono>
 #include <cassert>
 
+#include "test_macros.h"
+
+#if TEST_STD_VER > 14
+constexpr bool test_constexpr()
+{
+    std::chrono::seconds s(3);
+    s *= 5;
+    return s.count() == 15;
+}
+#endif
+
 int main()
 {
+    {
     std::chrono::nanoseconds ns(3);
     ns *= 5;
     assert(ns.count() == 15);
+    }
+    
+#if TEST_STD_VER > 14
+    static_assert(test_constexpr(), "");
+#endif
 }