Boost C++ Libraries

Clamp algorithm.

Marshall Clow

Suggested by olafvdspek in https://svn.boost.org/trac/boost/ticket/3215

namespace boost {
  namespace algorithm {
    template<typename T, typename Pred>
      T const & clamp(T const &,
                      typename boost::mpl::identity< T >::type const &,
                      typename boost::mpl::identity< T >::type const &, Pred);
    template<typename T>
      T const & clamp(const T &,
                      typename boost::mpl::identity< T >::type const &,
                      typename boost::mpl::identity< T >::type const &);
    template<typename InputIterator, typename OutputIterator>
      OutputIterator
      clamp_range(InputIterator first, InputIterator last, OutputIterator out,
                  typename std::iterator_traits< InputIterator >::value_type const & lo,
                  typename std::iterator_traits< InputIterator >::value_type const & hi);
    template<typename Range, typename OutputIterator>
      boost::disable_if_c< boost::is_same< Range, OutputIterator >::value, OutputIterator >::type
      clamp_range(const Range &, OutputIterator,
                  typename std::iterator_traits< typename boost::range_iterator< const Range >::type >::value_type const &,
                  typename std::iterator_traits< typename boost::range_iterator< const Range >::type >::value_type const &);
    template<typename InputIterator, typename OutputIterator, typename Pred>
      OutputIterator
      clamp_range(InputIterator first, InputIterator last, OutputIterator out,
                  typename std::iterator_traits< InputIterator >::value_type const & lo,
                  typename std::iterator_traits< InputIterator >::value_type const & hi,
                  Pred p);
    template<typename Range, typename OutputIterator, typename Pred>
      boost::disable_if_c< boost::is_same< Range, OutputIterator >::value, OutputIterator >::type
      clamp_range(const Range &, OutputIterator,
                  typename std::iterator_traits< typename boost::range_iterator< const Range >::type >::value_type const &,
                  typename std::iterator_traits< typename boost::range_iterator< const Range >::type >::value_type const &,
                  Pred);
  }
}