On 7 November 2011 16:54, Tom Van Cutsem <tomvc...@gmail.com> wrote: > I wrote up an initial (but fairly complete) draft of a proposed refactoring > of the ES5 [[Get]], [[Put]] and [[HasProperty]] algorithms to change the way > in which these algorithms climb the prototype > chain: <http://wiki.ecmascript.org/doku.php?id=strawman:refactoring_put>
Looks good, and as far as I can see from a first read, solves the issues we were discussing so far. But I have a follow-up request. :) Regarding redundant trap calls with proxies there is another, more pervasive problem with the current spec: in lots of places it first calls [[HasProperty]] and then [[Get]]. With proxies, this always implies two trap calls, which seems wasteful. Would it be possible to refactor that, too? Seems more difficult, because we would need to enable [[Get]] (and hence the get trap) to signal lookup failure. (Too bad that we cannot reuse `undefined' for it.) But I think the current situation isn't satisfactory. /Andreas _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
