author | jjkang |
Wed, 23 Jun 2010 16:56:47 +0800 | |
changeset 590 | 360bd6b35136 |
parent 0 | 044383f39525 |
permissions | -rw-r--r-- |
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// interator.hpp workarounds for non-conforming standard libraries ---------// |
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// (C) Copyright Beman Dawes 2000. Distributed under the Boost |
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// Software License, Version 1.0. (See accompanying file |
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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// See http://www.boost.org/libs/utility for documentation. |
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// Revision History |
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// 12 Jan 01 added <cstddef> for std::ptrdiff_t (Jens Maurer) |
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// 28 Jun 00 Workarounds to deal with known MSVC bugs (David Abrahams) |
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// 26 Jun 00 Initial version (Jeremy Siek) |
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#ifndef BOOST_ITERATOR_HPP |
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#define BOOST_ITERATOR_HPP |
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#include <iterator> |
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#include <cstddef> // std::ptrdiff_t |
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#include <boost/config.hpp> |
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namespace boost |
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{ |
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# if defined(BOOST_NO_STD_ITERATOR) && !defined(BOOST_MSVC_STD_ITERATOR) |
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template <class Category, class T, |
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class Distance = std::ptrdiff_t, |
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class Pointer = T*, class Reference = T&> |
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struct iterator |
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{ |
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typedef T value_type; |
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typedef Distance difference_type; |
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typedef Pointer pointer; |
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typedef Reference reference; |
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typedef Category iterator_category; |
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}; |
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# else |
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// declare iterator_base in namespace detail to work around MSVC bugs which |
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// prevent derivation from an identically-named class in a different namespace. |
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namespace detail { |
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template <class Category, class T, class Distance, class Pointer, class Reference> |
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# if !defined(BOOST_MSVC_STD_ITERATOR) |
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struct iterator_base : std::iterator<Category, T, Distance, Pointer, Reference> {}; |
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# else |
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struct iterator_base : std::iterator<Category, T, Distance> |
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{ |
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typedef Reference reference; |
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typedef Pointer pointer; |
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typedef Distance difference_type; |
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}; |
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# endif |
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} |
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template <class Category, class T, class Distance = std::ptrdiff_t, |
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class Pointer = T*, class Reference = T&> |
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struct iterator : boost::detail::iterator_base<Category, T, Distance, Pointer, Reference> {}; |
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# endif |
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} // namespace boost |
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#endif // BOOST_ITERATOR_HPP |