What is the difference between the two boost::adaptors functions sliced and copied? Looking at the code, one can see that copied uses sliced, but I am not sure if there is a subtle difference. Maybe it could be explained in the docs. Moreover, the docs say that sliced returns "make_range(rng, n, m)", but I could not find the documentation for make_range (and only found a function with this name in the range_detail namespace, but which does not correspond). Thanks!