Proposal: expression mode (=)

JongChan Choi jong at chan.moe
Sun Oct 30 14:17:01 UTC 2016


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 <mailto: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 <mailto:olalonde at gmail.com>> wrote:
>> Sounds like the "do expressions" proposal. http://wiki.ecmascript.org/doku.php?id=strawman:do_expressions <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 <javascript:_e(%7B%7D,'cvml','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 <http://www.syskall.com/> <-- connect with me!
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> 
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