Replace vim.tbl_add_reverse_lookup (deprecated in neovim v0.10)

[cttttt]

Problem

After rebuilding neovim from from master (specifically, 06135cc21571b2707121e31176f544a0e0901e1d), I'm noticing the following deprecation warning on startup:

vim.tbl_add_reverse_lookup is deprecated. :help deprecated
stack traceback:
        vim/shared.lua: in function 'tbl_add_reverse_lookup'
        ...nvim/lazy/bufferline.nvim/lua/bufferline/diagnostics.lua:10: in main chunk
        [C]: in function 'require'
        ...are/nvim/lazy/bufferline.nvim/lua/bufferline/buffers.lua:8: in main chunk
        [C]: in function 'require'
        .../share/nvim/lazy/bufferline.nvim/lua/bufferline/lazy.lua:11: in function '__index'
        ...local/share/nvim/lazy/bufferline.nvim/lua/bufferline.lua:56: in function <...local/share/nvim/lazy/bufferline.nvim/lua/buffer
line.lua:54>

Looking at neovim's deprecation help page, this function was deprecated as of neovim 0.10 and will not be replaced when it's removed.

How does this fix?

By crudely reimplementing tbl_add_reverse_lookup and using it in your diagnostics module.

Reviewer notes

I didn't take a super close look at the actual use of this reversed table (if you really need to have forward and also reverse mappings in the table). I simply reimplemented what is now missing from the vim module. If you don't need the mirrored mappings, utils.tbl_reverse_lookup() would suffice.

Version

neovim/neovim 06135cc21571b2707121e31176f544a0e0901e1d:

NVIM v0.11.0-dev-6+g06135cc21
Build type: RelWithDebInfo
LuaJIT 2.1.1713484068

[tan-wei]

Great!

[akinsho]

Thanks