Open-sourcing our emacs c-mode style rules.

2024-03-22 13:11:43 +08:00 · 2008-12-17 20:22:40 +00:00 · 2008-12-17 20:22:40 +00:00 · 219b1a61fd
commit 219b1a61fd
parent b87a3025fc
1 changed files with 108 additions and 0 deletions
--- a/google-c-style.el
+++ b/google-c-style.el
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+;;; google-c-style.el --- Google's C/C++ style for c-mode
+
+;; Keywords: c, tools
+
+;; google-c-style.el is Copyright (C) 2008 Google Inc. All Rights Reserved.
+;;
+;; It is free software; you can redistribute it and/or modify it under the
+;; terms of either:
+;;
+;; a) the GNU General Public License as published by the Free Software
+;; Foundation; either version 1, or (at your option) any later version, or
+;;
+;; b) the "Artistic License".
+
+;;; Commentary:
+
+;; Provides the google C/C++ coding style. You may wish to add
+;; `google-set-c-style' to your `c-mode-common-hook' after requiring this
+;; file. For example:
+;;
+;;    (add-hook 'c-mode-common-hook 'google-set-c-style)
+;;
+;; If you want the RETURN key to go to the next line and space over
+;; to the right place, add this to your .emacs right after the load-file:
+;;
+;;    (add-hook 'c-mode-common-hook 'google-make-newline-indent)
+
+;;; Code:
+
+(defconst google-c-style
+  `((c-recognize-knr-p . nil)
+    (c-enable-xemacs-performance-kludge-p . t) ; speed up indentation in XEmacs
+    (c-basic-offset . 2)
+    (indent-tabs-mode . nil)
+    (c-comment-only-line-offset . 0)
+    (c-hanging-braces-alist . ((defun-open after)
+                               (defun-close before after)
+                               (class-open after)
+                               (class-close before after)
+                               (namespace-open after)
+                               (inline-open after)
+                               (inline-close before after)
+                               (block-open after)
+                               (block-close . c-snug-do-while)
+                               (extern-lang-open after)
+                               (extern-lang-close after)
+                               (statement-case-open after)
+                               (substatement-open after)))
+    (c-hanging-colons-alist . ((case-label)
+                               (label after)
+                               (access-label after)
+                               (member-init-intro before)
+                               (inher-intro)))
+    (c-hanging-semi&comma-criteria
+     . (c-semi&comma-no-newlines-for-oneline-inliners
+        c-semi&comma-inside-parenlist
+        c-semi&comma-no-newlines-before-nonblanks))
+    (c-indent-comments-syntactically-p . nil)
+    (comment-column . 40)
+    (c-cleanup-list . (brace-else-brace
+                       brace-elseif-brace
+                       brace-catch-brace
+                       empty-defun-braces
+                       defun-close-semi
+                       list-close-comma
+                       scope-operator))
+    (c-offsets-alist . ((arglist-intro . ++)
+                        (func-decl-cont . ++)
+                        (member-init-intro . ++)
+                        (inher-intro . ++)
+                        (comment-intro . 0)
+                        (arglist-close . c-lineup-arglist)
+                        (topmost-intro . 0)
+                        (block-open . 0)
+                        (inline-open . 0)
+                        (substatement-open . 0)
+                        (statement-cont
+                         .
+                         (,(when (fboundp 'c-no-indent-after-java-annotations)
+                             'c-no-indent-after-java-annotations)
+                          ,(when (fboundp 'c-lineup-assignments)
+                             'c-lineup-assignments)
+                          ++))
+                        (label . /)
+                        (case-label . +)
+                        (statement-case-open . +)
+                        (statement-case-intro . +) ; case w/o {
+                        (access-label . /)
+                        (innamespace . 0))))
+  "Google C/C++ Programming Style")
+
+(defun google-set-c-style ()
+  "Set the current buffer's c-style to Google C/C++ Programming
+  Style. Meant to be added to `c-mode-common-hook'."
+  (interactive)
+  (make-local-variable 'c-tab-always-indent)
+  (setq c-tab-always-indent t)
+  (c-add-style "Google" google-c-style t))
+
+(defun google-make-newline-indent ()
+  "Sets up preferred newline behavior. Not set by default. Meant
+  to be added to `c-mode-common-hook'."
+  (interactive)
+  (define-key c-mode-base-map "\C-m" 'newline-and-indent)
+  (define-key c-mode-base-map [ret] 'newline-and-indent))
+
+(provide 'google-c-style)
+;;; google-c-style.el ends here