On Tue, Mar 19, 2019 at 9:41 AM Darin Dimitrov <darin.dimit...@gmail.com> wrote:
>
> I am trying to associate an internal field with a Local<Function> created 
> from a Local<FunctionTemplate>:
>
> Local<FunctionTemplate> ctorFuncTemplate = FunctionTemplate::New(isolate);
>
> Local<Function> ctorFunc = 
> ctorFuncTemplate->GetFunction(context).ToLocalChecked();
>
> ctorFunc->SetInternalField(0, External::New(isolate, ptr));
>
>
> This fails with "Internal field out of bounds".
>
>
> I am able to properly set the internal field count on object instances 
> created from this function:
>
>
> ctorFuncTemplate->InstanceTemplate()->SetInternalFieldCount(1);
>
>
> But what would be the proper way to set the internal field count for the 
> function instance itself?

It sounds like you should pass the External as the `data` argument to
FunctionTemplate::New().

You'll be able to retrieve it in the callback as
FunctionCallbackInfo<Value>::Data().

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