Returns the last element of a non-empty and finite iterable.Given a non-empty and finite iterable xs with a linearization of [x1, ..., xN], back(xs) is equal to xN. Equivalently, back(xs) must be equivalent to at_c<N-1>(xs), and that regardless of the value category of xs (back must respect the reference semantics of at). More...
Louis Dionne 2013-2016 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
