Le 19/03/2011 01:11, Brendan Eich a écrit : > On Mar 15, 2011, at 6:43 PM, David Bruant wrote: > >> Unfortunately, currently, on FF4, the property descriptor is >> rewritten, but with my comments on the code, you can see what results >> I would expect. But the potential of having my library-specific >> property descriptor format is here. > > Thanks for raising this issue. > > The proxies implementation in Firefox 4 is a prototype of a draft > standard, of course. Between bugs in the spec, future not-quite-bug > changes to the spec (improvements to go beyond the stated goals of > proxies), and bugs in our code, we reserve the right to change it at > any time. Caveat jsdevelopers. Of course, that's the reason why there is a "non-standard" bannier on top of the doc (https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Proxy). Should also be added something saying that the API is subject to change from version to version?
> This is fine and not a problem, IMHO. Our internal uses for security > membranes will of course track our changes to proxies. For the moment, with all the proxy-related discussions, I only see one thing that could change the way you use proxies and this thing is adding the proxy as an argument of every trap: http://wiki.ecmascript.org/doku.php?id=strawman:handler_access_to_proxy I don't know what is your proxy-based code base size and how proxies are used exactly, but this sounds like a difficult issue to handle. > But I wanted to write to assure you that we will make changes that > TC39 thinks are good for future-proofing, as well as intentional > changes and of course bug fixes. Thanks. In several places I talked about FF4 but it was more to relate my experience and give concrete examples of spec consequences. Nonetheless, I knew that the implementation may not currently reflect neither the spec proposal nor the latest discussions and decisions that could have happened. David
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