rust.vim VS Iron

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 It might be the built-in Rust support is out of date -- using that repo as a plugin would do the trick.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

I've written many things using Iron and it's been fine. It's not particularly developed any more but I am not aware of any major outstanding issues.

I don't miss the time when we basically only had Iron

iron

There're many web framework in rust, such as SergioBenitez/Rocket , actix/actix-web ,poem-web/poem , iron/iron . How do I chiose, anyone suggestion？

I'm not sure which definition of backend you are thinking of here. In case you simply mean "server side", here are a couple of libraries that might be of use: iron - been a while since I used it, used it for a couple smaller projects rocket (nightly only) - no personal experience, but a lot of people seem to like it diesel - a bit complex to wrap your head around, but once you get the idea it's really nice. Definitely check out the examples.

it's taken by a web framework https://github.com/iron/iron

Your comment touches on a few misconceptions I see a lot.

Firstly, `reqwest` exposes both an async and a synchronous API, allowing the developer to choose which one to use. They are largely interchangeable code-wise. [1]

Secondarily, and more broadly, async is possible to opt out of. You must understand that most web and network related libraries will be async by default for performance, because people who write in Rust and people who write web servers typically care greatly about performance. This is the intersection of those two groups. That being said, there are options outside of that ecosystem. [2]

If you truly want to use an asynchronous library without migrating your application to run entirely on an async runtime like tokio, you can run it inside of a synchronous function without much trouble. I've put together a playground link for you. [3]

1. https://docs.rs/reqwest/0.11.2/reqwest/blocking/index.html

2. Iron: https://github.com/iron/iron

There are several web frameworks for Rust: Rocket, Actix, Warp, Iron - but only Actix has released a stable 1.0 release, and there has been considerable controversy over how it uses unsafe Rust.