id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
44	build support for membranes	Brian Warner		"The sealer/unsealer code should also be usable to make it easy to create
Membranes (which are like a revokable forwarder, but every reference you pass
through it is also wrapped in a revokable forwarder, so that the users of the
interface don't have to refrain from passing their own references).

Something with an API like:

{{{
 wrapfunc = RevocableForwarder()
 d = tub.makeMembrane(orig, wrapfunc)
 # then later..
 wrapfunc.revoke()
}}}

I'm thinking that {{{wrapfunc}}} will be called for each Referenceable or
RemoteReference (ooh, interesting to think about the difference there..) that
passes through, and it is expected to return a new reference for each one.
{{{RovocableForwarder.__call__}}} would provide this.

This would also provide for things like:

{{{
 wrapfunc = LoggingForwarder(logfunc)
 wrapfunc = ArgumentAddingForwarder(owner=""bob"")
}}}

{{{makeMembrane}}} would be implemented with a special serialize/unserialize
pair, in which the unslicer table uses the wrapper function to handle
my-reference sequences.
"	enhancement	new	major	undecided	unknown	0.2.4