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CC Mode Manual

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A. Frequently Asked Questions

Q. How do I re-indent the whole file?

A. Visit the file and hit C-x h to mark the whole buffer. Then hit C-M-\.

Q. How do I re-indent the entire function? C-M-x doesn't work.

A. C-M-x is reserved for future Emacs use. To re-indent the entire function hit C-c C-q.

Q. How do I re-indent the current block?

A. First move to the brace which opens the block with C-M-u, then re-indent that expression with C-M-q.

Q. Why doesn't the RET key indent the new line?

A. Emacs' convention is that RET just adds a newline, and that C-j adds a newline and indents it. You can make RET do this too by adding this to your c-mode-common-hook:
 
(define-key c-mode-base-map "\C-m" 'c-context-line-break)

This is a very common question. If you want this to be the default behavior, don't lobby me, lobby RMS! :-)

Q. I put (c-set-offset 'substatement-open 0) in my `.emacs' file but I get an error saying that c-set-offset's function definition is void.

A. This means that CC Mode wasn't loaded into your Emacs session by the time the c-set-offset call was reached, most likely because CC Mode is being autoloaded. Instead of putting the c-set-offset line in your top-level `.emacs' file, put it in your c-mode-common-hook, or simply modify c-offsets-alist directly:
 
(setq c-offsets-alist '((substatement-open . 0)))

Q. How do I make strings, comments, keywords, and other constructs appear in different colors, or in bold face, etc.?

A. "Syntax Colorization" is a standard Emacs feature, controlled by font-lock-mode. CC Mode does not contain font-lock definitions for any of its supported languages.

Q. M-a and M-e used to move over entire balanced brace lists, but now they move into blocks. How do I get the old behavior back?

A. Use C-M-f and C-M-b to move over balanced brace blocks. Use M-a and M-e to move by statements, which will also move into blocks.

Q. Whenever I try to indent a line or type an "electric" key such as ;, {, or }, I get an error that look like this: Invalid function: (macro . #[.... What gives?

A. This is a common error when CC Mode hasn't been compiled correctly, especially under Emacs 19.34(39). If you are using the standalone CC Mode distribution, try recompiling it according to the instructions in the `README' file.


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