Subj : [Q] How to correctly implement 'resolve' for a class..
To   : netscape.public.mozilla.jseng
From : "t o b e" <Toby.Bradshaw@oregan.net>
Date : Wed Oct 08 2003 04:27 pm

I'm looking at using the resolve fn in a class def. to implement 'lazy'
properties in a JS scriptable C++ app I'm writing.

Basically.. I have a set of properties (which are themselves objects) many
of which may not be needed by a script and most of which are expensive to
create so rather than instantiating them all when I create the global object
I'm creating a blank global and using resolve to instantiate them (with
DefineObject) in the global when they're actually accessed.

The pseudo-code for my resolve is thus:

fn resolve(cx, parent, id):

    if id is an object I know about:

        DefineObject(etc)
        return JS_TRUE

    return JS_FALSE

This form causes problems when InitStandardClasses is called on the global
object. My resolve fn gets asked to resolve properties with ids such as
'Function', 'Object' which I don't know about so I return FALSE at which
point the init bails and everything comes tumbling down  (my own init code
bails if InitStandardClasses bails, logically enough I thought). If I
blindly return TRUE for everything I'm asked to resolve, whether I actually
define a property or not, InitStandardClasses succeeds and I can carry on
just fine.

So. what are these properties 'Function', 'Object' etc I'm being asked to
resolve supposed to represent, what should I return for them and what's the
right way to do all this ??

Thanks in anticipation...

t o b e

.