c-lineup-assignments is a compiled Lisp function in `cc-align.el'.

(c-lineup-assignments LANGELEM)

Line up the current line after the assignment operator on the first
line in the statement. If there isn't any, return nil to allow
stacking with other line-up functions. If the current line contains
an assignment operator too, try to align it with the first one.

Works with: topmost-intro-cont, statement-cont, arglist-cont,