【Emacs】C言語を書くときの設定

こんな感じ．

(add-hook 'c-mode-hook #'eglot-ensure)
(add-hook 'c-mode-common-hook
          #'(lambda ()
              (c-set-style "GNU")
              (setq c-basic-offset 4) ;; width of indent
              (setq fill-column 80)
              (setq-default auto-fill-mode t)))

;; https://emacs.stackexchange.com/questions/48500/how-to-clang-format-the-current-buffer-on-save
(defun clang-format-save-hook-for-this-buffer ()
  "Create a buffer local save hook."
  (add-hook 'before-save-hook
            (lambda ()
              (when (locate-dominating-file "." ".clang-format")
                (clang-format-buffer))
              ;; Continue to save.
              nil)
            nil
            ;; Buffer local hook.
            t))

;; Run this for each mode you want to use the hook.
(add-hook 'c-mode-hook (lambda () (clang-format-save-hook-for-this-buffer)))

clangdを動かす設定はこちらの記事にて．

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