New Textobj: item in list ","

[gerazov]

Textobj requested

Select item in a list of items separated with , and bound by brackets or newlines, e.g:

a = [1, 2, 3, 4]
b = [
    1, 2, 3, 4
    ]

This is similar to argument, but argument is limited to ().

Inner/Outer Difference

Inner leaves the ,
Outer includes the preceding (following if first item) ,

Vimscript plugin already implementing the textobj

https://github.com/wellle/targets.vim

Filetypes

all

Checklist

• The textobj would be useful to more users than just me.
• There is no lua plugin already implementing the textobj in an adequate manner.
• I read the docs and there is no such textobj already.

[chrisgrieser]

In most languages (e.g., lua), you can use the argument textobj from treesitter-textobjects for that already. If your language does not support that, I think it'd make more sense to make a FR there instead of re-implementing the same textobj again here

[gerazov]

Well not really, or at least as much as I know - the argument object works only for arguments in a function call, i.e. it'll work only if the items are bounded by ( ) and not in the case above.

[chrisgrieser]

as I said, is some languages like in lua, it also works for array elements. If it does not work in your language, it'd therefore make more sense to make a FR there instead of re-implementing the same textobj again here

[gerazov]

Oh you're right - it does work 😅 my bad - I thought I tested it ...

[gerazov]

It would be useful for pure text, e.g.

This is a list of items in: rst, md, txt, text, mail files. 

Here the treesitter solution doesn't work. Also for comments in code scripts that list stuff.

Currently I have it working through https://github.com/wellle/targets.vim, it would nice to have it in a nvim plugin.

[chrisgrieser]

Like a sub-sentence? Hmm. I can see a lot of potential edge cases for this (where does the first element in the list start, what about decimal commas and thousand separators, etc.)

Could you open a new issue for it since it's somewhat different, and also detail how exactly such a text object should behave?