bug#26750: [PATCH] add missing keywords to js-mode

[Jimmy Yuen Ho Wong <wyuenho@gmail.com>]

Technically, "async", "await" and "yield" can also be identifiers.
"async" should only be highlighted if it's followed by a function, arrow
function or a method. "await" should only be highlighted if it's inside
an async function, async arrow function or an async method. "yield"
should only be highlighted inside a generator function/arrow function
and method. But for all intends and purposes, you can put "await" and
"yield" into the list of keywords or you'll have to write a full blown
parser and AST in order to traverse back and forth. That's how Chrome
devtools does it anyway. Only "async", "as", "of" and "from" need
special handling.


On 28/04/2018 22:08, Noam Postavsky wrote:
> forcemerge 26750 31306
> quit
>
> Ruslan Bekenev <furyinbox@gmail.com> writes:
>
>> Hi. It is my first contribution. 
>> I hope everything is correct with this PATCH and submission itself. 
>> In this patch added two missed keywords to `js--keyword-re` which are `as` and `of`. 
>> `async` and `await` are already there. 
> Hi, sorry your patch was overlooked for so long.  Unfortunately, I think
> just adding keywords to js--keyword-re will not quite do the right
> thing, based on https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31306#5:
>
>     Specially, "as" and "from" should only be highlighted in an import
>     statement. "of" should only be highlighted in a for statement. Any other
>     occurrances of "as", "from" and "of" should not be highlighted as they
>     are legal identifiers outside of import and for statements respectively.
>
>