imgtools/imglib/boostlibrary/boost/range/sub_range.hpp
author lorewang
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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_SUB_RANGE_HPP
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#define BOOST_RANGE_SUB_RANGE_HPP
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#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500)) 
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    #pragma warning( push )
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    #pragma warning( disable : 4996 )
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#endif
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#include <boost/detail/workaround.hpp>
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#include <boost/range/config.hpp>
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#include <boost/range/iterator_range.hpp>
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#include <boost/range/value_type.hpp>
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#include <boost/range/size_type.hpp>
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#include <boost/range/difference_type.hpp>
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#include <boost/assert.hpp>
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#include <boost/type_traits/is_reference.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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namespace boost
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{
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    template< class ForwardRange > 
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    class sub_range : public iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type > 
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    {
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        typedef BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type iterator_t;
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        typedef iterator_range< iterator_t  > base;
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        typedef BOOST_DEDUCED_TYPENAME base::impl impl;
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    public:
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        typedef BOOST_DEDUCED_TYPENAME range_value<ForwardRange>::type            value_type;
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        typedef BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type         iterator;
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        typedef BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type   const_iterator;
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        typedef BOOST_DEDUCED_TYPENAME range_difference<ForwardRange>::type       difference_type;
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        typedef BOOST_DEDUCED_TYPENAME range_size<ForwardRange>::type             size_type;
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        typedef BOOST_DEDUCED_TYPENAME base::reference                            reference;
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    public: // for return value of front/back
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        typedef BOOST_DEDUCED_TYPENAME 
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                boost::mpl::if_< boost::is_reference<reference>,
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                                 const BOOST_DEDUCED_TYPENAME boost::remove_reference<reference>::type&, 
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                                 reference >::type const_reference;
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    public:
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        sub_range() : base() 
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        { }
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#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500) ) 
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        sub_range( const sub_range& r ) 
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            : base( static_cast<const base&>( r ) )  
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        { }  
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#endif
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        template< class ForwardRange2 >
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        sub_range( ForwardRange2& r ) : 
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#if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 800 )
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            base( impl::adl_begin( r ), impl::adl_end( r ) )
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#else
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            base( r )
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#endif        
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        { }
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        template< class ForwardRange2 >
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        sub_range( const ForwardRange2& r ) : 
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#if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 800 )
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            base( impl::adl_begin( r ), impl::adl_end( r ) )
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#else
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            base( r )
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#endif                
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        { }
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        template< class Iter >
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        sub_range( Iter first, Iter last ) :
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            base( first, last )
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        { }
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        template< class ForwardRange2 >
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        sub_range& operator=( ForwardRange2& r )
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        {
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            base::operator=( r );
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            return *this;
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        }
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        template< class ForwardRange2 >
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        sub_range& operator=( const ForwardRange2& r )
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        {
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            base::operator=( r );
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            return *this;
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        }   
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        sub_range& operator=( const sub_range& r )
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        {
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            base::operator=( static_cast<const base&>(r) );
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            return *this;            
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        }
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    public:
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        iterator        begin()          { return base::begin(); }
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        const_iterator  begin() const    { return base::begin(); }
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        iterator        end()            { return base::end();   }
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        const_iterator  end() const      { return base::end();   }
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        difference_type size() const     { return base::size();  }   
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    public: // convenience
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        reference front()
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        {
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            return base::front();
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        }
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        const_reference front() const
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        {
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            return base::front();
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        }
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        reference back()
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        {
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            return base::back();
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        }
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        const_reference back() const
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        {
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            return base::back();
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        }
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        reference operator[]( difference_type sz )
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        {
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            return base::operator[](sz);
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        }
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        const_reference operator[]( difference_type sz ) const
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        {
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            return base::operator[](sz);
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        }
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    };
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    template< class ForwardRange, class ForwardRange2 >
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    inline bool operator==( const sub_range<ForwardRange>& l,
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                            const sub_range<ForwardRange2>& r )
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    {
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        return iterator_range_detail::equal( l, r );
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    }
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    template< class ForwardRange, class ForwardRange2 >
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    inline bool operator!=( const sub_range<ForwardRange>& l,
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                            const sub_range<ForwardRange2>& r )
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    {
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        return !iterator_range_detail::equal( l, r );
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    }
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    template< class ForwardRange, class ForwardRange2 >
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    inline bool operator<( const sub_range<ForwardRange>& l,
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                           const sub_range<ForwardRange2>& r )
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    {
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        return iterator_range_detail::less_than( l, r );
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    }
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} // namespace 'boost'
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#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500)) 
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    #pragma warning( pop )
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#endif
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#endif
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