It's not a range of an vector but a range which start/end are defined by vectors. The best thing I can come up with is that such a range defines a path from on

It's not a range of an vector but a range which start/end are defined by vectors. The best thing I can come up with is that such a range defines a path from one tip of a (geomotric) vector to another vector and because vec in rust can have (theoretically) usize elements it's in a usize::MAX dimensional space ;=)