author | lorewang |
Thu, 11 Nov 2010 13:49:10 +0800 | |
changeset 679 | 85cca48b4293 |
parent 0 | 044383f39525 |
permissions | -rw-r--r-- |
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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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137 |
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138 |
reference operator[]( difference_type sz ) |
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{ |
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return base::operator[](sz); |
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141 |
} |
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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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147 |
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}; |
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149 |
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150 |
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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156 |
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157 |
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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163 |
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164 |
template< class ForwardRange, class ForwardRange2 > |
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inline bool operator<( const sub_range<ForwardRange>& l, |
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166 |
const sub_range<ForwardRange2>& r ) |
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167 |
{ |
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return iterator_range_detail::less_than( l, r ); |
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169 |
} |
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170 |
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171 |
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172 |
} // namespace 'boost' |
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173 |
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#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500)) |
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#pragma warning( pop ) |
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176 |
#endif |
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177 |
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178 |
#endif |
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179 |