Rust code completion for neovim

rust_code_completion_for_neovim.md

Rust code completion for neovim

Using vim-racer and racer.

racer

1. Install racer

   cargo install racer

2. Fetch the Rust sourcecode

   rustup component add rust-src

3. Set the RUST_SRC_PATH

   export RUST_SRC_PATH="$(rustc --print sysroot)/lib/rustlib/src/rust/src"

4. Test on the command line

   racer complete std::io::B

vim-racer

1. Add to vim-plug

   Plug 'racer-rust/vim-racer'

2. Add g:racer_cmd to init.vim

   set hidden
   let g:racer_cmd = "/path/to/racer/bin"
   

3. To show the complete function definition (e.g. its arguments and return type)

   let g:racer_experimental_completer = 1
   

4. GoTo definations

   au FileType rust nmap gd <Plug>(rust-def)
   au FileType rust nmap gs <Plug>(rust-def-split)
   au FileType rust nmap gx <Plug>(rust-def-vertical)
   au FileType rust nmap <leader>gd <Plug>(rust-doc)