How can a lexer decide a token to be "get", "IdentifierName" or "Identifier" ?

[Rick Waldron]

On Tue, Feb 5, 2013 at 3:19 AM, gaz Heyes <gazheyes at gmail.com> wrote:

> On 4 February 2013 23:44, Brendan Eich <brendan at mozilla.com> wrote:
>
>> What's confusing?
>>
>
> The fact that you can have an object property without a colon and a
> function without a function keyword.
>

ES6 concise methods will make this the norm:

let o = {
  meaning() {
    return 42;
  }
};

o.meaning(); // 42



> Then a property descriptor uses a completely new syntax to define the same
> thing. Why?
> Object.defineProperty(window,'x',{set:alert});
> x=1;
>


What part is "new syntax"? Property descriptors are just object literal
syntax—did you mean "different syntax"?



>
> To me this seems hacked together.
>
>
>> ({'get'x(){return 123;}}).x
>>>
>>
>> That's not legal ES5.
>>
>
> Some engines support it though and I'm pretty sure Firefox did at some
> point.
>

I think Brendan was referring to the quotes, ie. 'get'. Remove those for
legal syntax:

({ get x() { return 123; } }).x


Rick
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