I need to be able to write JS callable methods in C++ that have an
undefined return type at call-time, e.g.
var regval= some_component.QueryValue() which would return either an
integer, a string or an array of strings.
My understanding is that this is possible using variants, and that
variants are currently not supported by either XPCOM or XPConnect. My
problem is that the calls must be transparent to caller (callee side
complications are OK as long as no low-level hand-marshalling is needed) so just
wrapping everything around with objects is not a real option.
Is there any way (no matter how ugly) to achieve this without affecting
the JS side of things? Reading older threads and looking at bugzilla bug
44675 gives me the impression that at some point this was possible to do,
but nsVariant is not currently included in XPConnect. What is the status of this
patch (read: is it usable in mozilla 0.9.1 and why)
I'd be glad to work on any portion of XPConnect or XPIDL that would lead
to providing such functionality.
