In a C++ callback, one argument is a function and I want to get the
Local<Function> handle of it. With an earlier version of V8, this worked.
Local<Function> function = Local<Function>::Cast(args[0]->ToObject());
Now, I tried to directly cast the argument like I've seen it in an example.
This is my whole C++ callback.
void callback(const FunctionCallbackInfo<Value> &args)
> {
> Isolate* isolate = args.GetIsolate();
> HandleScope scope(isolate);
> if (args.Length() < 1 || !args[0]->IsFunction()) {
>
> isolate->ThrowException(Exception::TypeError(String::NewFromUtf8(isolate,
> "first argument must be a function")));
> return;
> }
> Local<Function> function = Local<Function>::Cast(args[0]); // error is
> at this line
// ...
}
However, I get the following compile error.
1> v8/v8.h(5571): error C2248: 'v8::HandleScope::CreateHandle' : cannot
> access protected member declared in class 'v8::HandleScope'
> 1> v8/v8.h(837) : see declaration of 'v8::HandleScope::CreateHandle'
> 1> v8/v8.h(817) : see declaration of 'v8::HandleScope'
> 1> v8/v8.h(5566) : while compiling class template member function
> 'v8::Handle<v8::Function> v8::Handle<v8::Function>::New(v8::Isolate *,T *)'
> 1> with
> 1> [
> 1> T=v8::Function
> 1> ]
> 1> v8/v8.h(311) : see reference to function template instantiation
> 'v8::Handle<v8::Function> v8::Handle<v8::Function>::New(v8::Isolate *,T *)'
> being compiled
> 1> with
> 1> [
> 1> T=v8::Function
> 1> ]
> 1> v8/v8.h(354) : see reference to class template instantiation
> 'v8::Handle<v8::Function>' being compiled
> 1> source.cpp(48) : see reference to class template instantiation
> 'v8::Local<v8::Function>' being compiled
How can I cast a callback argument to Local<Function>?
--
--
v8-users mailing list
[email protected]
http://groups.google.com/group/v8-users
---
You received this message because you are subscribed to the Google Groups
"v8-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
