Hi,
The current proxy_spec [1], for the Object.preventExtensions built-in,
suggests to read the result of the preventExtensions trap as a boolean
and throw if falsy.
From the developer perspective, this doesn't really add anything since
it's already possible to throw from within the trap (and that's probably
more explicit and clearer than returning false). This was pretty much
agreed on in another recent thread (end of [2], then [3][4][5]).
Is it possible to remove this part? In the end, the trap return value
would be just ignored.
David
[1]
http://wiki.ecmascript.org/doku.php?id=harmony:proxies_spec#changes_to_es5_built-in_functions
[2] https://mail.mozilla.org/pipermail/es-discuss/2013-January/027999.html
[3] https://mail.mozilla.org/pipermail/es-discuss/2013-January/028000.html
[4] https://mail.mozilla.org/pipermail/es-discuss/2013-January/028001.html
[5] https://mail.mozilla.org/pipermail/es-discuss/2013-January/028122.html
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