c-context-open-line
c-context-open-line is an interactive compiled Lisp function in `cc-cmds.el
'.
(c-context-open-line)
Insert a line break suitable to the context and leave point before it.
This is the `c-context-line-break' equivalent to `open-line', which is
normally bound to C-o. See `c-context-line-break' for the details.