doc: fix deprecation warnings from ToObject() in addons.md

oyyd · oyyd · commit 301b4a870f3d · 2018-10-10T15:17:27.000+08:00
These code snippets are also used in addon tests.
diff --git a/doc/api/addons.md b/doc/api/addons.md
@@ -589,16 +589,19 @@ namespace demo {
 
 using v8::FunctionCallbackInfo;
 using v8::Isolate;
+using v8::Context;
 using v8::Local;
 using v8::Object;
 using v8::String;
 using v8::Value;
 
 void CreateObject(const FunctionCallbackInfo<Value>& args) {
   Isolate* isolate = args.GetIsolate();
+  Local<Context> context = isolate->GetCurrentContext();
 
   Local<Object> obj = Object::New(isolate);
-  obj->Set(String::NewFromUtf8(isolate, "msg"), args[0]->ToString(isolate));
+  obj->Set(String::NewFromUtf8(isolate, "msg"),
+    args[0]->ToString(context).ToLocalChecked());
 
   args.GetReturnValue().Set(obj);
 }
@@ -1080,6 +1083,7 @@ namespace demo {
 
 using v8::FunctionCallbackInfo;
 using v8::Isolate;
+using v8::Context;
 using v8::Local;
 using v8::Number;
 using v8::Object;
@@ -1092,11 +1096,12 @@ void CreateObject(const FunctionCallbackInfo<Value>& args) {
 
 void Add(const FunctionCallbackInfo<Value>& args) {
   Isolate* isolate = args.GetIsolate();
+  Local<Context> context = isolate->GetCurrentContext();
 
   MyObject* obj1 = node::ObjectWrap::Unwrap<MyObject>(
-      args[0]->ToObject(isolate));
+      args[0]->ToObject(context).ToLocalChecked());
   MyObject* obj2 = node::ObjectWrap::Unwrap<MyObject>(
-      args[1]->ToObject(isolate));
+      args[1]->ToObject(context).ToLocalChecked());
 
   double sum = obj1->value() + obj2->value();
   args.GetReturnValue().Set(Number::New(isolate, sum));
