On Fri, Aug 10, 2012 at 4:11 PM, Allen Wirfs-Brock <[email protected]>wrote:
> > Neither ES5 or ES5.1 does a "own" check for either global var or function > declarations. See 10.5 step 5.c/8.b each of which calls HasBinding > 10.2.1.2.1 which does a [[HasProperty]] which, if necessary, looks up the > [[Prototype]] chain. > > The change made in ES5.1 (renumbered existing ES5 10.5 step 5.e as 5.f and > inserted a new step 5.e + substeps related to dealing with function > declarations that over-wrote accessor properties (both own or inherited) of > the global object as well function declarations that tried to redefined > non-configurable global object properties. This change was motivated by > https://bugzilla.mozilla.org/show_bug.cgi?id=577325 and the es-discuss > thread referenced in that bug. > > Note that the ES5.1 change only related to function declarations. ES5.1 > did not make any changes to the specified semantics of global var > declarations. > I just reviewed test262 and there aren't any tests that are specifically dedicated, however there is a ticket filed here: https://bugs.ecmascript.org/show_bug.cgi?id=315 Rick
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
