// interator.hpp workarounds for non-conforming standard libraries ---------// | |
// (C) Copyright Beman Dawes 2000. Distributed under the Boost | |
// Software License, Version 1.0. (See accompanying file | |
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
// See http://www.boost.org/libs/utility for documentation. | |
// Revision History | |
// 12 Jan 01 added <cstddef> for std::ptrdiff_t (Jens Maurer) | |
// 28 Jun 00 Workarounds to deal with known MSVC bugs (David Abrahams) | |
// 26 Jun 00 Initial version (Jeremy Siek) | |
#ifndef BOOST_ITERATOR_HPP | |
#define BOOST_ITERATOR_HPP | |
#include <iterator> | |
#include <cstddef> // std::ptrdiff_t | |
#include <boost/config.hpp> | |
namespace boost | |
{ | |
# if defined(BOOST_NO_STD_ITERATOR) && !defined(BOOST_MSVC_STD_ITERATOR) | |
template <class Category, class T, | |
class Distance = std::ptrdiff_t, | |
class Pointer = T*, class Reference = T&> | |
struct iterator | |
{ | |
typedef T value_type; | |
typedef Distance difference_type; | |
typedef Pointer pointer; | |
typedef Reference reference; | |
typedef Category iterator_category; | |
}; | |
# else | |
// declare iterator_base in namespace detail to work around MSVC bugs which | |
// prevent derivation from an identically-named class in a different namespace. | |
namespace detail { | |
template <class Category, class T, class Distance, class Pointer, class Reference> | |
# if !defined(BOOST_MSVC_STD_ITERATOR) | |
struct iterator_base : std::iterator<Category, T, Distance, Pointer, Reference> {}; | |
# else | |
struct iterator_base : std::iterator<Category, T, Distance> | |
{ | |
typedef Reference reference; | |
typedef Pointer pointer; | |
typedef Distance difference_type; | |
}; | |
# endif | |
} | |
template <class Category, class T, class Distance = std::ptrdiff_t, | |
class Pointer = T*, class Reference = T&> | |
struct iterator : boost::detail::iterator_base<Category, T, Distance, Pointer, Reference> {}; | |
# endif | |
} // namespace boost | |
#endif // BOOST_ITERATOR_HPP |