bug#68054: [PATCH] Add tree-sitter indent rule for lexical decls in js/typescript

[Dmitry Gutov <dmitry@gutov.dev>]

On 26/04/2024 01:48, Noah Peart wrote:
> Ok, I can make a patch for option 3 (the same as js-mode) instead. It's
> implementation is the simplest also.  Would that work?

I'd be okay with it, yes, thank you. If only because it's good to have 
similar defaults in both modes, and evolve them together until one is 
deprecated.

FTR, the option more in line with my previous explanation would be 
option 3, I think. Rhere's no real need to implement it right now, I 
guess, but for illustration:

const a =
         (x: string): string => {
           return x + x;
         },
       bbb =
         {
           "x": 0
         },
       cccc =
         1,
       ddddd = 0;

const bbb =
       {
         "x": 0
       }, a = (x: string): string => {
         return x + x;
       },
       bbb = {
         "x": 0
       },
       cccc = 1,
       ddddd = 0;

js-mode also has by necessity the below exceptions: when the first 
variable's value starts on the same line, and it's multiline (usually 
that means that the same line ends with a {), then its indentation level 
goes back to the statement, not to the "const" keyword:

const a = (x: string): string => {
   return x + x;
}

var bbb = {
   "x": 0
}

This is basically to support the non-multivar declarations better. 
js-ts-mode now has the exact same indentation; these cases might come up 
when you change how the first two cases indent, however.