From 59d9cfa96dcd407308c6eaf5f8dc3ae612d117a3 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Fri, 9 Sep 2016 21:21:22 -0400
Subject: [PATCH] Update the availability of floor, ceil, round

---
 date.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/date.h b/date.h
index 45253f4..fb66308 100644
--- a/date.h
+++ b/date.h
@@ -964,7 +964,7 @@ trunc(const std::chrono::duration<Rep, Period>& d)
 }
 
 // VS Update 2 provides floor, ceil, round, abs in chrono.
-#if !defined(_MSC_FULL_VER) || _MSC_FULL_VER < 190023918
+#if (defined(_MSC_FULL_VER) && _MSC_FULL_VER < 190023918) || __cplusplus <= 201402
 
 // round down
 template <class To, class Rep, class Period>
@@ -1061,14 +1061,14 @@ ceil(const std::chrono::time_point<Clock, FromDuration>& tp)
     return time_point<Clock, To>{ceil<To>(tp.time_since_epoch())};
 }
 
-#else  // !defined(_MSC_FULL_VER) || _MSC_FULL_VER < 190023918
+#else  // (defined(_MSC_FULL_VER) && _MSC_FULL_VER < 190023918) || __cplusplus <= 201402
 
 using std::chrono::floor;
 using std::chrono::ceil;
 using std::chrono::round;
 using std::chrono::abs;
 
-#endif  // !defined(_MSC_FULL_VER) || _MSC_FULL_VER < 190023918
+#endif  // (defined(_MSC_FULL_VER) && _MSC_FULL_VER < 190023918) || __cplusplus <= 201402
 
 // trunc towards zero
 template <class To, class Clock, class FromDuration>