c-langelem-col is a compiled Lisp function in `cc-defs.el'.

(c-langelem-col LANGELEM &optional PRESERVE-POINT)

Return the column of the anchor position in LANGELEM.
Also move the point to that position unless PRESERVE-POINT is non-nil.

LANGELEM is either a cons cell on the "old" form given as the first
argument to lineup functions or a syntactic element on the "new"
form as used in `c-syntactic-element'.