Returns a value that is offset the specified distance from this value.
The distance to advance this value.
A value that is offset from this value by
advanced(by:) method in generic code to offset a value by a specified distance. If you’re working directly with numeric values, use the addition operator (
+) instead of this method.
For a value
x, a distance
n, and a value
y = x.advanced(by: n),
x.distance(to: y) == n.