Add Date::New overload for a std::chrono::system_clock::time_point

Author: cacharle

napi-inl.h

@@ -20,6 +20,9 @@
 #endif  // NAPI_HAS_THREADS
 #include <type_traits>
 #include <utility>
+#if __cplusplus >= 201103L
+#include <chrono>
+#endif
 
 #if defined(__clang__) || defined(__GNUC__)
 #define NAPI_NO_SANITIZE_VPTR __attribute__((no_sanitize("vptr")))
@@ -1199,6 +1202,15 @@ inline Date Date::New(napi_env env, double val) {
   return Date(env, value);
 }
 
+#if __cplusplus >= 201103L
+inline Date Date::New(napi_env env, std::chrono::system_clock::time_point tp) {
+  using namespace std::chrono;
+  auto ms = static_cast<double>(
+      duration_cast<milliseconds>(tp.time_since_epoch()).count());
+  return Date::New(env, ms);
+}
+#endif
+
 inline void Date::CheckCast(napi_env env, napi_value value) {
   NAPI_CHECK(value != nullptr, "Date::CheckCast", "empty value");
 

napi.h

@@ -685,6 +685,12 @@ class Date : public Value {
                   double value   ///< Number value
   );
 
+  /// Creates a new Date value from a std::chrono::system_clock::time_point.
+  static Date New(
+      napi_env env,                             ///< Node-API environment
+      std::chrono::system_clock::time_point tp  ///< Time point value
+  );
+
   static void CheckCast(napi_env env, napi_value value);
 
   Date();  ///< Creates a new _empty_ Date instance.