77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
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// Boost.Range library
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//
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// Copyright Thorsten Ottosen 2003-2004. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// For more information, see http://www.boost.org/libs/range/
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//
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#ifndef BOOST_RANGE_CONST_ITERATOR_HPP
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#define BOOST_RANGE_CONST_ITERATOR_HPP
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <boost/range/config.hpp>
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#include <boost/range/range_fwd.hpp>
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#include <boost/range/detail/extract_optional_type.hpp>
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#include <boost/type_traits/remove_const.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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#include <cstddef>
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#include <utility>
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namespace boost
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{
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//////////////////////////////////////////////////////////////////////////
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// default
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//////////////////////////////////////////////////////////////////////////
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namespace range_detail
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{
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BOOST_RANGE_EXTRACT_OPTIONAL_TYPE( const_iterator )
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template< typename C >
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struct range_const_iterator_helper
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: extract_const_iterator<C>
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{};
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//////////////////////////////////////////////////////////////////////////
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// pair
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//////////////////////////////////////////////////////////////////////////
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template< typename Iterator >
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struct range_const_iterator_helper<std::pair<Iterator,Iterator> >
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{
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typedef Iterator type;
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};
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//////////////////////////////////////////////////////////////////////////
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// array
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//////////////////////////////////////////////////////////////////////////
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template< typename T, std::size_t sz >
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struct range_const_iterator_helper< T[sz] >
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{
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typedef const T* type;
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};
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} // namespace range_detail
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template<typename C, typename Enabler=void>
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struct range_const_iterator
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: range_detail::range_const_iterator_helper<
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BOOST_DEDUCED_TYPENAME remove_reference<C>::type
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>
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{
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};
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} // namespace boost
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#endif
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