General rust configuration for emacs

elisp/rust-setup.el

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+; Activate cargo minor-mode on rust-mode start
+(add-hook 'rust-mode-hook 'cargo-minor-mode)
+
+;; Activate racer on rust-mode start
+(add-hook 'rust-mode-hook #'racer-mode)
+(add-hook 'racer-mode-hook #'eldoc-mode)
+
+;; Code completion
+(add-hook 'racer-mode-hook #'company-mode)
+(require 'rust-mode)
+(define-key rust-mode-map (kbd "TAB") #'company-indent-or-complete-common)
+(setq company-tooltip-align-annotations t)