Proposal: expression mode (=)

Yad Smood y.s.inside at gmail.com
Sun Oct 30 14:45:07 UTC 2016


I think `label: ’value'` is not a legal statement I think, so you actually
can distinguish them.


On Sun, Oct 30, 2016 at 10:17 PM JongChan Choi <jong at chan.moe> wrote:

> ambiguous case
>
> ```
> let x = {
> // statements here? label: ’value' };
> ```
>
> 2016. 10. 30., 오후 5:54, JongChan Choi <jong at chan.moe> 작성:
>
>
> OMG sweet! I love it.
> then how it’ll be formed when mixed with labeled statement?
>
> 2016. 10. 30., 오후 3:15, Yongxu Ren <renyongxu at gmail.com> 작성:
>
> Yes, it does the exact same thing.
> I think using = and operators is a bit cleaner than 'do'.
> However, The biggest advantage for this feature is you can write
> functional code without extra syntax.
> Allowing block to return value will allow you to write concise code like
> in ocaml Haskell or scala.
>
> On Sunday, October 30, 2016, Olivier Lalonde <olalonde at gmail.com> wrote:
>
> Sounds like the "do expressions" proposal.
> http://wiki.ecmascript.org/doku.php?id=strawman:do_expressions
>
> On Sat, Oct 29, 2016 at 5:32 PM, Yongxu Ren <renyongxu at gmail.com> wrote:
>
> potentially, this syntax can be extended to functions
> ```
> function f() ={stat}
> // is equivalent to
> function f() {return stat}
>
>
> let f = () => ={stat}
> // are equivalent to
> let f = () => stat
> ```
>
> it can also be applied to `try...catch`.... and more, such as
>
> ```
> // pattern matching
> match(expr) {
>   pattern1:={
>     //block
>   }
>   pattern2:={
>     //block
>   }
>   pattern3:={
>     //block
>   }
> }
>
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> --
> - Oli
>
> Oli Lalonde
> http://www.syskall.com <-- connect with me!
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