Thank you.
I used a hack to work around my problem, but your solution seems to be
just what I need.
-g.
On Nov 29, 10:41 am, Christian Plesner Hansen
<[EMAIL PROTECTED]> wrote:
> If I understand you correctly your question is: given a function
> object as a callback argument, how do you create an instance of that
> function? You can do something along these lines:
>
> Handle<Value> my_function(const Arguments& args) {
> Handle<Object> arg = args[0];
> if (!arg->IsFunction()) {
> return Undefined();
> // you could also throw an exception here
> }
> Handle<Function> cons = Handle<Function>::Cast(arg);
> return arg->NewInstance();
>
> }
>
> 'F->NewInstance()' is the C++ version of javascript's 'new F()'.
>
> -- Christian
>
> On Tue, Nov 25, 2008 at 1:38 PM, George Moschovitis
>
> <[EMAIL PROTECTED]> wrote:
>
> > Hello everyone,
>
> > since this is my first post on this group, let me start by sending
> > thanks to the V8 developers for releasing this great JavaScript
> > engine. With that out of the way, let's move to my question:
>
> > I have a C++ function that works more or less like this:
>
> > Handle<Value> my_function(const Arguments & args) {
> > HandleScope handle_scope;
> > ..
> > Handle<Object> obj = Object::New();
> > ..
>
> > return obj;
> > }
>
> > This is accessible from JavaScript as myFunction(), ie:
>
> > var obj = myFunction();
>
> > I would like to convert this function to work like this:
>
> > var User = function() {
> > ..
> > };
> > var user = myFunction(User); // should return a User 'instance'
> > instead of a 'plain' Object
>
> > How should I change this line:
>
> > Handle<Object> obj = Object::New();
>
> > to take args[0] into account?
>
> > thanks in advance for your help,
>
> > George.
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