2012/12/12 Kevin Reid <[email protected]> > On Wed, Dec 12, 2012 at 12:35 PM, David Bruant <[email protected]> wrote: > >> I was a bit too strong in my statement, sorry. Let me rephrase: the >> internal [[Target]] can't be changed, but a proxy can emulate changing of >> "fake" target as long as what happens with this "fake" target doesn't >> involve invariant checking. >> That's the reason I was suggesting that WindowProxies could (maybe >> depending on how the object reference was obtained) throw whenever >> invariant checks are involved. >> > > Exactly. So a user-defined switching proxy needs only to: > 1. refuse to commit to any invariant (non-configurable property or > preventExtensions) > 2. even if its switchable-target has an invariant, do not expose that > invariant (i.e. pretend each property is configurable) >
Sorry for arriving late to this thread. The solution that Kevin described is also how I would approach a "retargetable proxy" (i.e. a proxy that can wrap different target objects over time).
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
