From 23b1f007fe2f0eae33333286785560693d5f6eb3 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Sun, 25 Nov 2018 14:38:54 -0500
Subject: [PATCH] Patch for VS-2017 compatiblity

---
 include/date/tz.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/date/tz.h b/include/date/tz.h
index 49e4320..8c96d91 100644
--- a/include/date/tz.h
+++ b/include/date/tz.h
@@ -357,6 +357,7 @@ public:
     explicit zoned_time(TimeZonePtr z);
 
 #if HAS_STRING_VIEW
+#  if !defined(_MSC_VER) || (_MSC_VER > 1900)
     template <class T = TimeZonePtr,
               class = typename std::enable_if
               <
@@ -366,9 +367,10 @@ public:
                       decltype(zoned_traits<T>::locate_zone(std::string_view()))
                   >::value
               >::type>
+#  endif
         explicit zoned_time(std::string_view name);
 #else
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
+#  if !defined(_MSC_VER) || (_MSC_VER > 1900)
     template <class T = TimeZonePtr,
               class = typename std::enable_if
               <
@@ -378,7 +380,7 @@ public:
                       decltype(zoned_traits<T>::locate_zone(std::string()))
                   >::value
               >::type>
-#endif
+#  endif
         explicit zoned_time(const std::string& name);
 #endif
 
@@ -1376,7 +1378,9 @@ zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z)
 #if HAS_STRING_VIEW
 
 template <class Duration, class TimeZonePtr>
+#  if !defined(_MSC_VER) || (_MSC_VER > 1900)
 template <class, class>
+#  endif
 inline
 zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name)
     : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name))
@@ -1385,9 +1389,9 @@ zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name)
 #else  // !HAS_STRING_VIEW
 
 template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
+#  if !defined(_MSC_VER) || (_MSC_VER > 1900)
 template <class T, class>
-#endif
+#  endif
 inline
 zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name)
     : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name))