1 // Boost next_prior.hpp header file ---------------------------------------//
3 // (C) Copyright Boost.org 1999-2003. Permission to copy, use, modify, sell
4 // and distribute this software is granted provided this copyright
5 // notice appears in all copies. This software is provided "as is" without
6 // express or implied warranty, and with no claim as to its suitability for
9 // See http://www.boost.org/libs/utility for documentation.
11 #ifndef BOOST_NEXT_PRIOR_HPP_INCLUDED
12 #define BOOST_NEXT_PRIOR_HPP_INCLUDED
16 // Helper functions for classes like bidirectional iterators not supporting
17 // operator+ and operator-
20 // const std::list<T>::iterator p = get_some_iterator();
21 // const std::list<T>::iterator prev = boost::prior(p);
23 // Contributed by Dave Abrahams
26 inline T next(T x) { return ++x; }
29 inline T prior(T x) { return --x; }
33 #endif // BOOST_NEXT_PRIOR_HPP_INCLUDED