update

node_modules/nan/nan_define_own_property_helper.h

@@ -0,0 +1,29 @@
+/*********************************************************************
+ * NAN - Native Abstractions for Node.js
+ *
+ * Copyright (c) 2018 NAN contributors
+ *
+ * MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
+ ********************************************************************/
+
+#ifndef NAN_DEFINE_OWN_PROPERTY_HELPER_H_
+#define NAN_DEFINE_OWN_PROPERTY_HELPER_H_
+
+namespace imp {
+
+inline Maybe<bool> DefineOwnPropertyHelper(
+    v8::PropertyAttribute current
+  , v8::Handle<v8::Object> obj
+  , v8::Handle<v8::String> key
+  , v8::Handle<v8::Value> value
+  , v8::PropertyAttribute attribs = v8::None) {
+  return !(current & v8::DontDelete) ||                     // configurable OR
+                  (!(current & v8::ReadOnly) &&             // writable AND
+                   !((attribs ^ current) & ~v8::ReadOnly))  // same excluding RO
+             ? Just<bool>(obj->ForceSet(key, value, attribs))
+             : Nothing<bool>();
+}
+
+}  // end of namespace imp
+
+#endif  // NAN_DEFINE_OWN_PROPERTY_HELPER_H_