Use uncaught_exceptions in C++17

README.md

@@ -4,7 +4,7 @@
 
 ---
 
-**[Try it out on wandbox!](https://wandbox.org/permlink/akDd3tAEwxZtdB2B)**
+**[Try it out on wandbox!](https://wandbox.org/permlink/L8MwjzSSC3fXXrMd)**
 
 ## Summary
 

include/date/date.h

@@ -1080,7 +1080,12 @@ class save_ostream
 public:
     ~save_ostream()
     {
-        if ((this->flags_ & std::ios::unitbuf) && !std::uncaught_exception() &&
+        if ((this->flags_ & std::ios::unitbuf) &&
+#if __cplusplus >= 201703
+                std::uncaught_exceptions() == 0 &&
+#else
+                !std::uncaught_exception() &&
+#endif
                 this->is_.good())
             this->is_.rdbuf()->pubsync();
     }