On Fri, Feb 3, 2012 at 7:26 PM, Allen Wirfs-Brock <al...@wirfs-brock.com> wrote: > On Feb 3, 2012, at 4:26 PM, Jason Orendorff wrote: >> On 2/3/12 6:13 PM, Allen Wirfs-Brock wrote: >>> But I also have to validly (and hopefully reasonably) specify exactly what >>> happens for the unrealistic use cases. There is a problem with your >>> desugaring in that the evaluation of INIT isn't scoped correctly relative >>> to V. >> Hmmm. I don't see the problem yet. I think it's scoped the way I intended >> it: INIT is evaluated in the enclosing environment; V isn't in scope. > > Under the scoping rules TC39 has agreed to, the initializer of a let/const is > always shadowed by the binding it is initializing[...]
That rule doesn't make sense in this context. There should be either one V for the whole loop, or one V per iteration. Having both seems perverse. Again, one can focus on parallels between "for(let V=E;;)" and "let V=E;" or on parallels between "for(let V=E;;)" and "for (let V of E)". I find the latter more important because experience and evidence suggest that that is what will affect users in practice. -j _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
