Racer VS rust.vim

I recently have decided to switch to it full time, and I've encountered some annoyances while developing in Rust in it. The default rust setup uses eldoc combined with racer, which has been deprecated for a while now, for auto completion and stuff like that.

On the server side, things are better, but RLS is still using racer for completions, which was never quite precise for me, and has a big disclaimer of "use rust-analyzer instead" in the README.

I am using rustaceanvim and rust.vim.

When the file first loads, it uses the syntax defined in the $VIMRUNTIME/syntax/rust.vim file from rust.vim, which is what I want, but after a few seconds (probably once rust-analyzer loads and runs), it changes the highlighting to use different colours (there's probably a better way to describe it, but a video is easier to show). This colour change also happens when I write the file (and rust-analyzer runs again).

Or this https://github.com/rust-lang/rust.vim, it has example with running tests

If you need basic syntax checking on leaving insert mode (without saving file), https://github.com/rust-lang/rust.vim can be used

Seems like there's a tree-sitter solution, but I do want to note that this works out of the box with rust.vim: https://github.com/rust-lang/rust.vim/issues/63. It might be the built-in Rust support is out of date -- using that repo as a plugin would do the trick.

Most of the customizations in the $VIMRUNTIME's rust ftplugin are guarded behind a flag (g:rust_fold, g:rustfmt_autosave,g:rust_recommended_style, etc.) to control enabling and disabling them, but for some reason the navigation mappings are unconditionally defined, with no flag to turn them off... It might be worth going through the issues in https://github.com/rust-lang/rust.vim to see if that ever came up before.

Is having rust.vim necessary if I'm using rust-tools already?

Primeagen has a series, you could also try spacevim or lunarvim( i prefer lunarvim). If you want to read the docs and setup yourself 1. lsp and code completion mentioned in #5. 2. treesitter 3. lsp handles that, you have to install java's lsp, this improves its look. 4. Make your own remaps, some languages have a plugin for this but i can't find one for java, this is the one for rust. 5. Install cmp and one of the snippet engines.

writing rust is the same regardless of which editor you use and using vim is the same regardless of what programming language you are in, so i dont think you need a tutorial neccissarily. ive been using this plugin for rust-specific features https://github.com/rust-lang/rust.vim

As for plugins for Rust development, I’d recommend Conquer of Completion (using the coc-rust-analyser coc plugin), Rust lang’s rust plugin, and the Toml plugin