On Sun, May 9, 2010 at 2:52 PM, Gmail Dev <[email protected]> wrote:
> On May 9, 2010, at 10:50 AM, "Mark S. Miller" <[email protected]> wrote: > [...] > > > * Const Functions: > <<http://wiki.ecmascript.org/doku.php?id=strawman:const_functions> > http://wiki.ecmascript.org/doku.php?id=strawman:const_functions> > > > The case with const function expressions is a bit unclear. > > What happens when: > > var f = const g(){ > function g(){}; > }; > > Is f writable in this case but g isn't? > Yes. f is also visible in the containing scope. g is only visible within the function (or would be if it weren't shadowed). > Would executing f throw error due to redeclaration of g? > If I read the ES5 spec correctly, in the following code the declaration of g in the function body shadows the g declared by the function expression rather than redeclaring it. const should likewise shadow rather than error, as implied by the expansion shown on the strawman page. var f = function g(){ function g(){}; }; > > -- > kangax > -- Cheers, --MarkM
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