12 Overloading [over]

12.3 Overload resolution [over.match]

12.3.3 Best viable function [over.match.best]

12.3.3.1 Implicit conversion sequences [over.best.ics]

12.3.3.1.3 Ellipsis conversion sequences [over.ics.ellipsis]

An ellipsis conversion sequence occurs when an argument in a function call is matched with the ellipsis parameter specification of the function called (see [expr.call]).