Support for LSP Snippets

[nathanblair]

There are a couple issues floating around GitHub for the different LSP clients for vim/nvim, their completion engines, and various snippet integration engines.

An issue does not seem to be filed with asyncomplete.vim yet for this support (correct me and close this if I'm wrong!) so I wanted to start that thread.

For any that are unaware, it appears that clangd broadcasts support for c++ snippets and those broadcasts appropriately show up in the omni popup menu.

I can navigate through those "completion" options that are sourced as "snippets" from clangd, but I can't invoke the snippet.

Now, maybe this isn't a job for the completion engine? Should this fall onto a snippet engine instead? If that's the case, I feel it may be time to write a vim-lsp-snippet project for that very reason, as LSP snippets (I don't think) don't belong in the hands of something like UltiSnips/neosnippet/etc. Or at least, if they do, this vim-lsp/asyncomplete.vim/etc. toolset would be best not to rely on them for fear of "getting more than you bargained for". But I am not familiar with snippet engines in general so I could be very wrong about this.

Nonetheless, there's my two cents. Is expanding LSP snippets something the asyncomplete project feels it should handle? Should that fall into the hands of something like UltiSnips? Should another tool for this vim-lsp chain be added explicitly for LSP snippet expansion?

P.S. I apologize for this being mildly incoherent. I'm up way past my bedtime and far too tired to be very coherent ATM 😆

[prabirshrestha]

By default vim-lsp never exposes snippet support as client capabilities so servers shouldn't be sending it.

Snippets is quite a big project so I don't see it happening anytime soon in asyncomplete or vim-lsp since I'm still working on making those awesome 😄 .

I think it is still easy to make a patch to make it easily work with neosnippet using user_data https://github.com/Shougo/neosnippet.vim/blob/f7755084699db69ce9ff51c87baf8e639b7e543a/autoload/neosnippet/mappings.vim#L166-L175.

Utils snips also supports similar syntax so it should be possible.

[nathanblair]

I totally understand. Your work has been nothing short of fantastic and I'll be keeping a close eye on its progression.

I did find neoclide/coc.nvim

It looks like it has LSP snippet support. I haven't had the chance to download and build it yet to test it but I'll report on how successful I was.

Thanks for the reply though. Consider this issue resolved, unless you consider it worth it to keep around as a TODO of implementing LSP Snippet support?

[prabirshrestha]

WIP but you can see some initial PR at prabirshrestha/vim-lsp#247

[prabirshrestha]

Please give prabirshrestha/vim-lsp#306 a try and let us know if it satisfies your need.