Wouldn't waiting for es7 make this a breaking change? On Dec 3, 2013 4:46 PM, "Brendan Eich" <[email protected]> wrote:
> I mailed Arv and he kindly offered to draft and champion a bite-sized > strawman for ES7, to support if/while/switch(let). Yay! > > /be > > Waldemar Horwat <mailto:[email protected]> >> December 3, 2013 2:55 AM >> >> >> I frequently use the C++ equivalent of this. Haven't proposed it as part >> of the scoping upgrades just to keep things small, but I don't have any >> good reason not to do something like this either. It kind of falls in the >> same bucket as &&=, ||=, and ^^. >> >> Waldemar >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >> Nick Krempel <mailto:[email protected]> >> November 29, 2013 5:29 PM >> Couldn't find anything on this in the archives, but is there a proposal >> for: >> >> if (let var = expr) { >> // var in scope >> } >> else { >> // var in scope >> } >> // var out of scope >> >> i.e. shorthand for: >> >> { >> let var = expr; >> if (var) { >> // ... >> } >> else { >> // ... >> } >> } >> >> Also: >> >> switch (let var = expr) { >> case foo: >> // var in scope >> default: >> // var in scope >> } >> // var out of scope >> >> ...which has a similar expansion. >> >> Similarly for "while" and "do...while": this would bring everything in >> line with the current "for" / "for in" / "for of". >> >> This also matches what C++ allows, with the exception of "do...while" (in >> our case, it seems acceptable to allow "do...while" too - the value would >> simply be "undefined" on the first iteration). >> >> ("const" should also be OK in place of "let", at least for "if" and >> "switch".) >> >> Nick >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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