cpp/chrono/time point/operator inc dec

Modifies the point in time represents by one tick of the.

If is a member variable holding the duration (i.e., time since epoch) of this  object, @1@ Equivalent to @2@ Equivalent to @3@ Equivalent to @4@ Equivalent to

Parameters
(none)

Return value
@1,3@ a reference to this after modification @2,4@ a copy of the made before modification