Adding a new variant for autocompletion

[wojciech-kulik]

Hello,

I'm working with Swift language, I would like to achieve some transformation for closures.

Let's say I've got the function:

func foo(value: String, completion: () -> ()) {
    print("test")
}

When I use autocompletion I get:

If I hit enter when closure (() -> ()) is selected I would like it to be transformed into:

any guidance on how I could achieve that would be great.

Should I do it manually in lua overriding <cr> hit in selection mode? Or are there any mechanisms from LuaSnip/nvim-cmp which could make it simpler?

Thanks in advance!

[L3MON4D3]

Hi!

The regular approach to changing the snippet manually like that would be a choiceNode, which means you couldn't use <Cr>, but some other keycombo.

I guess the other issue is intercepting the completion-result from nvim-cmp/lsp.. do you know where the snippet for the function is coming from?

[wojciech-kulik]

I guess it is coming from LSP, because it's based on the function that I declared, but I'm not sure how it works internally.

You mentioned choiceNode, but if it's provided by LSP, can I add somehow a choiceNode?

It sounds like it would be easier to just run transformation on buffer line, regex to find the pattern and gsub to replace it :D

[L3MON4D3]

Ah, okay, then this is a bit tricky:
You'd have to intercept the results from lsp and modify them, I do something like that to solve a pretty similar problem (for c++, add a choiceNode to toggle between () and {}).

But true, manual text-transformations are probablem way more KISS :D

[wojciech-kulik]

Interesting, thank you for the code example :)! I will see which way to go. Thanks for the help! 🍻

[L3MON4D3]

Happy I could help :)