| // Boost.Range library |
| // |
| // Copyright Neil Groves 2009. |
| // Copyright Thorsten Ottosen 2003-2004. Use, modification and |
| // distribution is subject to 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) |
| // |
| // For more information, see http://www.boost.org/libs/range/ |
| // |
| |
| #ifndef BOOST_RANGE_SUB_RANGE_HPP |
| #define BOOST_RANGE_SUB_RANGE_HPP |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500)) |
| #pragma warning( push ) |
| #pragma warning( disable : 4996 ) |
| #endif |
| |
| #include <boost/detail/workaround.hpp> |
| #include <boost/range/config.hpp> |
| #include <boost/range/iterator_range.hpp> |
| #include <boost/range/value_type.hpp> |
| #include <boost/range/size_type.hpp> |
| #include <boost/range/difference_type.hpp> |
| #include <boost/range/algorithm/equal.hpp> |
| #include <boost/assert.hpp> |
| #include <boost/type_traits/is_reference.hpp> |
| #include <boost/type_traits/remove_reference.hpp> |
| |
| namespace boost |
| { |
| |
| template< class ForwardRange > |
| class sub_range : public iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type > |
| { |
| typedef BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type iterator_t; |
| typedef iterator_range< iterator_t > base; |
| |
| typedef BOOST_DEDUCED_TYPENAME base::impl impl; |
| public: |
| typedef BOOST_DEDUCED_TYPENAME range_value<ForwardRange>::type value_type; |
| typedef BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type iterator; |
| typedef BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type const_iterator; |
| typedef BOOST_DEDUCED_TYPENAME range_difference<ForwardRange>::type difference_type; |
| typedef BOOST_DEDUCED_TYPENAME range_size<ForwardRange>::type size_type; |
| typedef BOOST_DEDUCED_TYPENAME base::reference reference; |
| |
| public: // for return value of front/back |
| typedef BOOST_DEDUCED_TYPENAME |
| boost::mpl::if_< boost::is_reference<reference>, |
| const BOOST_DEDUCED_TYPENAME boost::remove_reference<reference>::type&, |
| reference >::type const_reference; |
| |
| public: |
| sub_range() : base() |
| { } |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500) ) |
| sub_range( const sub_range& r ) |
| : base( static_cast<const base&>( r ) ) |
| { } |
| #endif |
| |
| template< class ForwardRange2 > |
| sub_range( ForwardRange2& r ) : |
| |
| #if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 800 ) |
| base( impl::adl_begin( r ), impl::adl_end( r ) ) |
| #else |
| base( r ) |
| #endif |
| { } |
| |
| template< class ForwardRange2 > |
| sub_range( const ForwardRange2& r ) : |
| |
| #if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 800 ) |
| base( impl::adl_begin( r ), impl::adl_end( r ) ) |
| #else |
| base( r ) |
| #endif |
| { } |
| |
| template< class Iter > |
| sub_range( Iter first, Iter last ) : |
| base( first, last ) |
| { } |
| |
| template< class ForwardRange2 > |
| sub_range& operator=( ForwardRange2& r ) |
| { |
| base::operator=( r ); |
| return *this; |
| } |
| |
| template< class ForwardRange2 > |
| sub_range& operator=( const ForwardRange2& r ) |
| { |
| base::operator=( r ); |
| return *this; |
| } |
| |
| sub_range& operator=( const sub_range& r ) |
| { |
| base::operator=( static_cast<const base&>(r) ); |
| return *this; |
| } |
| |
| public: |
| |
| iterator begin() { return base::begin(); } |
| const_iterator begin() const { return base::begin(); } |
| iterator end() { return base::end(); } |
| const_iterator end() const { return base::end(); } |
| difference_type size() const { return base::size(); } |
| |
| |
| public: // convenience |
| reference front() |
| { |
| return base::front(); |
| } |
| |
| const_reference front() const |
| { |
| return base::front(); |
| } |
| |
| reference back() |
| { |
| return base::back(); |
| } |
| |
| const_reference back() const |
| { |
| return base::back(); |
| } |
| |
| reference operator[]( difference_type sz ) |
| { |
| return base::operator[](sz); |
| } |
| |
| const_reference operator[]( difference_type sz ) const |
| { |
| return base::operator[](sz); |
| } |
| |
| }; |
| |
| template< class ForwardRange, class ForwardRange2 > |
| inline bool operator==( const sub_range<ForwardRange>& l, |
| const sub_range<ForwardRange2>& r ) |
| { |
| return boost::equal( l, r ); |
| } |
| |
| template< class ForwardRange, class ForwardRange2 > |
| inline bool operator!=( const sub_range<ForwardRange>& l, |
| const sub_range<ForwardRange2>& r ) |
| { |
| return !boost::equal( l, r ); |
| } |
| |
| template< class ForwardRange, class ForwardRange2 > |
| inline bool operator<( const sub_range<ForwardRange>& l, |
| const sub_range<ForwardRange2>& r ) |
| { |
| return iterator_range_detail::less_than( l, r ); |
| } |
| |
| |
| } // namespace 'boost' |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500)) |
| #pragma warning( pop ) |
| #endif |
| |
| #endif |
| |