U.11.5 Comments in C Modes

C mode and related modes use a number of variables for controlling comment format.

c-comment-only-line-offset

Extra offset for line which contains only the start of a comment. It can be either an integer or a cons cell of the form (non-anchored-offset . anchored-offset), where non-anchored-offset is the amount of offset given to non-column-zero anchored comment-only lines, and anchored-offset is the amount of offset to give column-zero anchored comment-only lines. Just an integer as value is equivalent to (val . 0).

c-comment-start-regexp

This buffer-local variable specifies how to recognize the start of a comment.

c-hanging-comment-ender-p

If this variable is nil, c-fill-paragraph leaves the comment terminator of a block comment on a line by itself. The default value is t, which puts the comment-end delimiter `*/' at the end of the last line of the comment text.

c-hanging-comment-starter-p

If this variable is nil, c-fill-paragraph leaves the starting delimiter of a block comment on a line by itself. The default value is t, which puts the comment-start delimiter `/*' at the beginning of the first line of the comment text.