coc-ccls VS nvim-cmp

I just did a fresh reinstall of CoC, on a newer version of Neovim. I'm now seeing something I hadn't seen before, which CoC calls "inlay hints". They look like this:

As recommended by michaelsbradley below, I installed https://github.com/nim-lang/langserver. I'm using coc.nvim (https://github.com/neoclide/coc.nvim) so I followed the instructions here from nim langserver https://github.com/nim-lang/langserver#vimneovim and seems to be working well!

Actually, I'm maintaining coc-perl (https://github.com/bmeneg/coc-perl), which enables the use of Perl LSP extension for vcode on vim/neovim using the CoC (https://github.com/neoclide/coc.nvim) backend. But it's completely on top of Perl::LanguageServer.

For vim specifically, I've been using coc.nvim, which works pretty well for my needs, and I know its quite popular. Another fairly popular one is YouCompleteMe, which I had taken a look at for some other languages; but ended up just using coc as I can't justify using YCM once a year (if that) -- too much "headache" for not a lot of use, you know?

Plug 'https://github.com/neoclide/coc.nvim' " Auto Completion

I do think VSCode is a great tool and I recommend it frequently to people, but I still want to set the record straight here. Yes, vim is obviously limited in the sense that as a CLI app it doesn't draw it's own PDF or HTML windows, that's fair. But it can remote control your favorite PDF viewer or browser for roughly the same functionality. I'm currently writing my thesis using vimtex and it's quite smooth. And all the other stuff you mention is implemented quite competently by various plugins like vim-fugitive, coc.nvim, vimspector and copilot.vim.

Sounds like you want vim-which-key and coc.nvim.

Another option is to just download https://github.com/neoclide/coc.nvim Which is basically a one stop shop for completion, and it's pretty fast, it just uses nodejs instead of built in nvim lua functions.

coc.nvim

dont over copy and paste example .vimrc, keep it simple and grow tooling as you use. for linting and code completion : https://github.com/neoclide/coc.nvim (easy to add languages)

vim.api.nvim_set_hl(0, "PmenuSel", { bg = c.background_light, fg = "NONE" }) vim.api.nvim_set_hl(0, "Pmenu", { fg = c.foreground, bg = c.background_light }) vim.api.nvim_set_hl(0, "CmpItemAbbrDeprecated", { fg = c.foreground_light, bg = "NONE", strikethrough = true }) vim.api.nvim_set_hl(0, "CmpItemAbbrMatch", { fg = c.blue , bg = "NONE", bold = true }) vim.api.nvim_set_hl(0, "CmpItemAbbrMatchFuzzy", { fg = c.blue, bg = "NONE", bold = true }) vim.api.nvim_set_hl(0, "CmpItemMenu", { fg = c.purple, bg = "NONE", italic = true }) vim.api.nvim_set_hl(0, "CmpItemKindField", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindProperty", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindEvent", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindText", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindEnum", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindKeyword", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindConstant", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindConstructor", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindReference", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindFunction", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindStruct", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindClass", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindModule", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindOperator", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindVariable", { fg = c.foreground }) vim.api.nvim_set_hl(0, "CmpItemKindFile", { fg = c.foreground }) vim.api.nvim_set_hl(0, "CmpItemKindUnit", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindSnippet", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindFolder", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindMethod", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindValue", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindEnumMember", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindInterface", { fg = c.aqua }) vim.api.nvim_set_hl(0, "CmpItemKindColor", { fg = c.aqua }) vim.api.nvim_set_hl(0, "CmpItemKindTypeParameter", { fg = c.aqua }) -- https://github.com/hrsh7th/nvim-cmp/pull/1689 vim.api.nvim_set_hl(0, 'FloatBorder', { fg = c.background_light, bg = c.background_light })

Doing a fast scan on the commit history this is probably related to https://github.com/hrsh7th/nvim-cmp/pull/1689 . Hope it helps.

https://github.com/hrsh7th/nvim-cmp This is an autocompletion engine https://github.com/nvim-treesitter/nvim-treesitter This allows NeoVim to install parsing scripts so NeoVim can do things like code highlighting. https://github.com/williamboman/mason.nvim Not strictly necessary, but allows you to access a repo of LSP, install them, and configure them for without you actively messing about in config files. https://github.com/neovim/nvim-lspconfig Also not strictly necessary, but vastly simplifies LSP setup. https://github.com/williamboman/mason-lspconfig.nvim This lets the above two plugins talk to each other more easily.

Edit: Solved I only had to do this

toggling sources by Treesitter context

But today I'm a different person, and I'm sure that this is the right decision. I already gave a spiel on the cmp PR, but lemme copy-paste my response for those that weren't following the issue or don't check their GitHub notifications:

EDIT: I was able to reproduce the issue with a simplified nvim-cmp init.vim - posted here: https://github.com/hrsh7th/nvim-cmp/issues/1728

You need to add nvim-cmp and cmp-nvim-lsp

one thing that always annoyed me is how the autocomplete window behaves. when the space below your current line isn't sufficient it just teleports above the line. i know you can set a custom menu direction but i'd much rather have it pop up in a consistent place that is below the current line. the other behavior i dislike is the sizing. it's as big as the longest function in the list which can make the window enormous, to the point where there's almost no place left for the docs window. there aren't really any docs in the example below but i imagine with the little space that is left it'll get troublesome for more verbose docs such as with rust. i'd like to somehow tell nvim-cmp to always pop up below the current line, no matter how long the list is and possibly limit the horizontal size. is that at all possible? i've looked through the nvim-cmp wiki but haven't found an adequate solution. does this go beyond nvim-cmp?

Update: This isn't currently supported by nvim-cmp (and in fact it has been a feature request for a bit) and so I did my best and opened a PR that implements it :)