Is there way to import go functions with receiver?

[eaglexiang]

I'd like to implementate and import a go-code lib, but I found no property or method of v8.CallbackArgs to get method caller.

In other words, I can get function args with v8.CallbackArgs.Args or v8.CallbackArgs.Arg(int), but I cannot get receiver(sometimes called caller), which is usually used like below:

$("test").each(f);

If I implementate $ in golang, that's easy, how can I implementate the each method? or how can I get value of caller $("test) in a standard v8-style callback function?

func each(args v8.CallbackArgs)(*v8.Value, error) {
    // how can I get value of $("test") here?
}

[eaglexiang]

In a go-based JS runtime I used before called otto, I can use method like:

func each(call otto.FunctionCall) otto.Value {
    this := call.This // this is caller
}

[augustoroman]

Unfortunately it's not possible with the current code, but it doesn't look too hard to add.

• Basically you want to add This *Value to v8.CallbackArgs here: https://github.com/augustoroman/v8/blob/master/v8.go#L39-L48
• Then add a new this C.ValueTuple parameter to go_callback_handler here: https://github.com/augustoroman/v8/blob/master/v8.go#L39-L48
• That parameter would need to be passed from the c++ code here: https://github.com/augustoroman/v8/blob/master/v8.go#L39-L48
• And you would construct that parameter using args.This() from the FunctionCallbackInfo class passed in (ref: https://v8docs.nodesource.com/node-4.8/dd/d0d/classv8_1_1_function_callback_info.html), similar to how each arg is converted to a ValueTuple here: https://github.com/augustoroman/v8/blob/master/v8_c_bridge.cc#L292