Rust

Let's setup Emacs for Rust development, shall we ?

Also note that Spacemacs has a Rust layer.

rust-mode

rust-mode (in MELPA) offers:

• syntax highlighted,
• code formatting, optionally automatic,
• Imenu support,
• navigation by semantics (go to the beginning or end of the current defun), (see also helm-swoop, helm-ag, tags,…)
• playpen helpers (send the selected code to play.rust-lang.org),
• …

In Debian testing and unstable you can also install it with apt install elpa-rust-mode (but the MELPA way is prefered).

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Code formatting with rustfmv

Formatting is also provided by this mode. If you want auto formatting everytime you save a buffer, put this in your Init File:

(setq rust-format-on-save t)

On-the-fly syntax checking: Flycheck-rust

See flycheck-rust (on MELPA). See Flycheck.

Emacs-racer

See emacs-racer (also in MELPA) for documentation and screencasts. It provides:

• code completion of variables, functions and modules (not macros yet due to a racer limitation) (see also company-mode)
• jump to definition (bound to M-.)
• describe functions and types,

Run Cargo tasks

cargo.el ("cargo" in MELPA) gives us a set of key combinations to perform Cargo tasks within our Rust projects.

See also Compilation.

Debugging

Use the built-in gbd and use rust-gdb to launch gdb with the Rust-specific pretty-printers enabled.

Protip: set breakpoints with "break file:line" instead of "rbreak" which can give an "unmatched quote" error.