Subj : Re: request for new feature in spidermonkey (or workaround)
To   : Brann Joly
From : Igor Bukanov
Date : Mon May 10 2004 05:52 pm

Brann Joly wrote:
> Hi,
> 
> In the getter protoype, there is an extra parameter "tinyid" enabling the
> getter function to know which member of the object was requested.
> 
> I can't find any way to do the same things with methods (i'd like
> spidermonkey to call the c++ function associated with the js method with an
> extra parameter containing kind of tinyid identifying the called method.
> 
> The reason why i want to do that is that i want to make available to
> javascript some objects i don't know about at compile time (since i cant
> create the wrappers at compile time, i would need to create'em at runtime,
> but it doesn't seem to be possible in c++)
> 
> The member functions of the c++ objects are called via a message system, so
> with the extra parameter i'm asking for, i would be able to determine the
> message id to send, according to the tiny id provided by spidermonkey

In JS you call the member function foo.bar() in the following ways:

foo.bar_alias = foo.bar;
foo.bar_alias();

or

var x = for.bar;
x.call(foo);

So you can not rely on the fact that your function would be called 
through the same member!

Why not to use the function name instead?

Regards, Igor

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