No, that paraphrases “no TCP, everything behaves like in normal functions”. That is, it describes how return, break, continue currently work in functions.
[[[Sent from a mobile device. Please forgive brevity and typos.]]] Dr. Axel Rauschmayer [email protected] Home: http://rauschma.de Blog: http://2ality.com On 01.04.2012, at 10:40, Dmitry Soshnikov <[email protected]> wrote: > > On Apr 1, 2012, at 1:22 AM, Axel Rauschmayer wrote: > >>> On Apr 1, 2012, at 12:34 AM, Axel Rauschmayer wrote: >>> >>>>>> Ah, good. But one can use the above (pseudo-)desugaring to predict the >>>>>> behavior of arrow functions, right? That is, there is no observable >>>>>> difference. >>>>> >>>>> There is, again, the difference in terms of delegation to the target's >>>>> [[Construct]] in case of a bound function, see the spec ("bound" per ES5, >>>>> of course, since, as Brendan notices, it's not just a syntactic sugar, >>>>> but a new special type of functions). >>>> >>>> OK. Ignoring [[Construct]] and .prototype, any other differences? >>> >>> Well, "ES5-bounds" also do not have `prototype' property, but delegate to >>> the target's `prototype'. However, yes, there is the (main) difference in >>> respect of supporting TCP (if I understand correctly, since had no time to >>> follow the complete thread) -- return and break/continue jumps to the >>> parent frame instead of working with the function itself. >> >> Arrow functions do not adhere to TCP. Everything you need to know is here: >> http://wiki.ecmascript.org/doku.php?id=strawman:arrow_function_syntax > > Yes, thanks I've read it. But probably I misunderstood the description, but > what then is the following mean? > > "... bind return in the Block body case so it returns from the immediately > enclosing arrow function, and preclude breakand continue from referencing > statements outside the immediately enclosing arrow function." > > Isn't it for supporting TCP? (sorry if it was already discussed and explained > before, that's said, unfortunately hadn't time to join earlier) > > Dmitry
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