ceph/src/boost/libs/tr1/include/boost/tr1/detail/functor2iterator.hpp

   1 //  (C) Copyright John Maddock 2005.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_TR1_FUNCTOR_IT_HPP_INCLUDED
   7 #  define BOOST_TR1_FUNCTOR_IT_HPP_INCLUDED
   8
   9 # include <boost/iterator/iterator_facade.hpp>
  10
  11 namespace boost{ namespace tr1_details{
  12
  13 template <class Func, class R>
  14 struct functor2iterator : boost::iterator_facade<functor2iterator<Func,R>, const R, std::input_iterator_tag>
  15 {
  16    functor2iterator() : m_func(0){}
  17    functor2iterator(Func& f)
  18       : m_func(&f)
  19    {
  20       m_val = (*m_func)();
  21    }
  22    const R& dereference()const
  23    { return m_val; }
  24    void increment(){ m_val = (*m_func)(); }
  25    bool equal(const functor2iterator&)const
  26    { return false; }
  27 private:
  28    Func* m_func;
  29    R m_val;
  30 };
  31
  32 } }
  33
  34 #endif