diff -r e1b950c65cb4 -r 837f303aceeb epoc32/include/stdapis/boost/range/iterator_range.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/epoc32/include/stdapis/boost/range/iterator_range.hpp Wed Mar 31 12:33:34 2010 +0100 @@ -0,0 +1,608 @@ +// Boost.Range library +// +// Copyright Thorsten Ottosen & Pavol Droba 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_ITERATOR_RANGE_HPP +#define BOOST_RANGE_ITERATOR_RANGE_HPP + +// From boost/dynamic_bitset.hpp; thanks to Matthias Troyer for Cray X1 patch. +#include // Define __STL_CONFIG_H, if appropriate. +#ifndef BOOST_OLD_IOSTREAMS +# if defined(__STL_CONFIG_H) && \ + !defined (__STL_USE_NEW_IOSTREAMS) && !defined(__crayx1) \ + /**/ +# define BOOST_OLD_IOSTREAMS +# endif +#endif // #ifndef BOOST_OLD_IOSTREAMS + +#include +#include +#include +#include +#include +#include +#include +#include +#ifndef BOOST_OLD_IOSTREAMS +# include +#else +# include +#endif +#include + + +/*! \file + Defines the \c iterator_class and related functions. + \c iterator_range is a simple wrapper of iterator pair idiom. It provides + a rich subset of Container interface. +*/ + + +namespace boost +{ + namespace iterator_range_detail + { + // + // The functions adl_begin and adl_end are implemented in a separate + // class for gcc-2.9x + // + template + struct iterator_range_impl { + template< class ForwardRange > + static IteratorT adl_begin( ForwardRange& r ) + { + return IteratorT( boost::begin( r ) ); + } + + template< class ForwardRange > + static IteratorT adl_end( ForwardRange& r ) + { + return IteratorT( boost::end( r ) ); + } + }; + + template< class Left, class Right > + inline bool equal( const Left& l, const Right& r ) + { + typedef BOOST_DEDUCED_TYPENAME boost::range_size::type sz_type; + + sz_type l_size = boost::size( l ), + r_size = boost::size( r ); + + if( l_size != r_size ) + return false; + + return std::equal( boost::begin(l), boost::end(l), + boost::begin(r) ); + } + + template< class Left, class Right > + inline bool less_than( const Left& l, const Right& r ) + { + return std::lexicographical_compare( boost::begin(l), + boost::end(l), + boost::begin(r), + boost::end(r) ); + } + + struct range_tag { }; + struct const_range_tag { }; + + } + +// iterator range template class -----------------------------------------// + + //! iterator_range class + /*! + An \c iterator_range delimits a range in a sequence by beginning and ending iterators. + An iterator_range can be passed to an algorithm which requires a sequence as an input. + For example, the \c toupper() function may be used most frequently on strings, + but can also be used on iterator_ranges: + + \code + boost::tolower( find( s, "UPPERCASE STRING" ) ); + \endcode + + Many algorithms working with sequences take a pair of iterators, + delimiting a working range, as an arguments. The \c iterator_range class is an + encapsulation of a range identified by a pair of iterators. + It provides a collection interface, + so it is possible to pass an instance to an algorithm requiring a collection as an input. + */ + template + class iterator_range + { + protected: // Used by sub_range + //! implementation class + typedef iterator_range_detail::iterator_range_impl impl; + public: + + //! this type + typedef iterator_range type; + //BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION(value_type); + + //! Encapsulated value type + typedef BOOST_DEDUCED_TYPENAME + iterator_value::type value_type; + + //! Difference type + typedef BOOST_DEDUCED_TYPENAME + iterator_difference::type difference_type; + + //! Size type + typedef std::size_t size_type; // note: must be unsigned + + //! This type + typedef iterator_range this_type; + + //! Refence type + // + // Needed because value-type is the same for + // const and non-const iterators + // + typedef BOOST_DEDUCED_TYPENAME + iterator_reference::type reference; + + //! const_iterator type + /*! + There is no distinction between const_iterator and iterator. + These typedefs are provides to fulfill container interface + */ + typedef IteratorT const_iterator; + //! iterator type + typedef IteratorT iterator; + + iterator_range() : m_Begin( iterator() ), m_End( iterator() ), + singular( true ) + { } +/* +#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) + iterator_range( this_type r ) : + : m_Begin(r.begin()), m_End(r.end()) + { } + + this_type& operator=( this_type r ) + { + m_Begin = r.begin(); + m_End = r.end(); + return *this; + } +#endif +*/ + //! Constructor from a pair of iterators + template< class Iterator > + iterator_range( Iterator Begin, Iterator End ) : + m_Begin(Begin), m_End(End), singular(false) {} + + //! Constructor from a Range + template< class Range > + iterator_range( const Range& r ) : + m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) ), + singular(false) {} + + //! Constructor from a Range + template< class Range > + iterator_range( Range& r ) : + m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) ), + singular(false) {} + + //! Constructor from a Range + template< class Range > + iterator_range( const Range& r, iterator_range_detail::const_range_tag ) : + m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) ), + singular(false) {} + + //! Constructor from a Range + template< class Range > + iterator_range( Range& r, iterator_range_detail::range_tag ) : + m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) ), + singular(false) {} + + #if !BOOST_WORKAROUND(BOOST_MSVC, < 1300) + this_type& operator=( const this_type& r ) + { + m_Begin = r.begin(); + m_End = r.end(); + // + // remark: this need not necessarily be true, but it does no harm + // + singular = r.singular; + return *this; + } + #endif + + template< class Iterator > + iterator_range& operator=( const iterator_range& r ) + { + m_Begin = r.begin(); + m_End = r.end(); + // + // remark: this need not necessarily be true, but it does no harm + // + singular = r.empty(); + return *this; + } + + template< class ForwardRange > + iterator_range& operator=( ForwardRange& r ) + { + m_Begin = impl::adl_begin( r ); + m_End = impl::adl_end( r ); + singular = false; + return *this; + } + + template< class ForwardRange > + iterator_range& operator=( const ForwardRange& r ) + { + m_Begin = impl::adl_begin( r ); + m_End = impl::adl_end( r ); + singular = false; + return *this; + } + + IteratorT begin() const + { + return m_Begin; + } + + IteratorT end() const + { + return m_End; + } + + size_type size() const + { + if( singular ) + return 0; + +#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582)) + return std::distance( m_Begin, m_End ); +#else + return std::distance( m_Begin, m_End ); +#endif + } + + bool empty() const + { + if( singular ) + return true; + + return m_Begin == m_End; + } + +#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) + operator bool() const + { + return !empty(); + } +#else + typedef iterator (iterator_range::*unspecified_bool_type) () const; + operator unspecified_bool_type() const + { + return empty() ? 0: &iterator_range::end; + } +#endif + + bool equal( const iterator_range& r ) const + { + return singular == r.singular && m_Begin == r.m_Begin && m_End == r.m_End; + } + + +#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING + + bool operator==( const iterator_range& r ) const + { + return iterator_range_detail::equal( *this, r ); + } + + bool operator!=( const iterator_range& r ) const + { + return !operator==(r); + } + + bool operator<( const iterator_range& r ) const + { + return iterator_range_detail::less_than( *this, r ); + } + +#endif + + public: // convenience + reference front() const + { + BOOST_ASSERT( !empty() ); + return *m_Begin; + } + + reference back() const + { + BOOST_ASSERT( !empty() ); + IteratorT last( m_End ); + return *--last; + } + + reference operator[]( size_type sz ) const + { + //BOOST_STATIC_ASSERT( is_random_access ); + BOOST_ASSERT( sz < size() ); + return m_Begin[sz]; + } + + iterator_range& advance_begin( difference_type n ) + { + std::advance( m_Begin, n ); + return *this; + } + + iterator_range& advance_end( difference_type n ) + { + std::advance( m_End, n ); + return *this; + } + + private: + // begin and end iterators + IteratorT m_Begin; + IteratorT m_End; + bool singular; + }; + +// iterator range free-standing operators ---------------------------// + +#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING +#else + template< class Iterator > + inline bool empty( const iterator_range& r ) + { + // + // this will preserve the well-defined empty() even + // though 'r' is singular. + // + return r.empty(); + } +#endif + +#ifndef BOOST_OLD_IOSTREAMS + + //! iterator_range output operator + /*! + Output the range to an ostream. Elements are outputed + in a sequence without separators. + */ + template< typename IteratorT, typename Elem, typename Traits > + inline std::basic_ostream& operator<<( + std::basic_ostream& Os, + const iterator_range& r ) + { + std::copy( r.begin(), r.end(), + std::ostream_iterator< BOOST_DEDUCED_TYPENAME + iterator_value::type, + Elem, Traits>(Os) ); + return Os; + } + +#else + + //! iterator_range output operator + /*! + Output the range to an ostream. Elements are outputed + in a sequence without separators. + */ + template< typename IteratorT > + inline std::ostream& operator<<( + std::ostream& Os, + const iterator_range& r ) + { + std::copy( r.begin(), r.end(), std::ostream_iterator(Os)); + return Os; + } + +#endif + + ///////////////////////////////////////////////////////////////////// + // comparison operators + ///////////////////////////////////////////////////////////////////// + + template< class IteratorT, class ForwardRange > + inline bool operator==( const ForwardRange& l, + const iterator_range& r ) + { + return iterator_range_detail::equal( l, r ); + } + + template< class IteratorT, class ForwardRange > + inline bool operator!=( const ForwardRange& l, + const iterator_range& r ) + { + return !iterator_range_detail::equal( l, r ); + } + + template< class IteratorT, class ForwardRange > + inline bool operator<( const ForwardRange& l, + const iterator_range& r ) + { + return iterator_range_detail::less_than( l, r ); + } + +#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING +#else + template< class Iterator1T, class Iterator2T > + inline bool operator==( const iterator_range& l, + const iterator_range& r ) + { + return iterator_range_detail::equal( l, r ); + } + + template< class IteratorT, class ForwardRange > + inline bool operator==( const iterator_range& l, + const ForwardRange& r ) + { + return iterator_range_detail::equal( l, r ); + } + + + template< class Iterator1T, class Iterator2T > + inline bool operator!=( const iterator_range& l, + const iterator_range& r ) + { + return !iterator_range_detail::equal( l, r ); + } + + template< class IteratorT, class ForwardRange > + inline bool operator!=( const iterator_range& l, + const ForwardRange& r ) + { + return !iterator_range_detail::equal( l, r ); + } + + + template< class Iterator1T, class Iterator2T > + inline bool operator<( const iterator_range& l, + const iterator_range& r ) + { + return iterator_range_detail::less_than( l, r ); + } + + template< class IteratorT, class ForwardRange > + inline bool operator<( const iterator_range& l, + const ForwardRange& r ) + { + return iterator_range_detail::less_than( l, r ); + } + +#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING + +// iterator range utilities -----------------------------------------// + + //! iterator_range construct helper + /*! + Construct an \c iterator_range from a pair of iterators + + \param Begin A begin iterator + \param End An end iterator + \return iterator_range object + */ + template< typename IteratorT > + inline iterator_range< IteratorT > + make_iterator_range( IteratorT Begin, IteratorT End ) + { + return iterator_range( Begin, End ); + } + +#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING + + template< typename Range > + inline iterator_range< BOOST_DEDUCED_TYPENAME range_result_iterator::type > + make_iterator_range( Range& r ) + { + return iterator_range< BOOST_DEDUCED_TYPENAME range_result_iterator::type > + ( boost::begin( r ), boost::end( r ) ); + } + +#else + //! iterator_range construct helper + /*! + Construct an \c iterator_range from a \c Range containing the begin + and end iterators. + */ + template< class ForwardRange > + inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator::type > + make_iterator_range( ForwardRange& r ) + { + return iterator_range< BOOST_DEDUCED_TYPENAME range_iterator::type > + ( r, iterator_range_detail::range_tag() ); + } + + template< class ForwardRange > + inline iterator_range< BOOST_DEDUCED_TYPENAME range_const_iterator::type > + make_iterator_range( const ForwardRange& r ) + { + return iterator_range< BOOST_DEDUCED_TYPENAME range_const_iterator::type > + ( r, iterator_range_detail::const_range_tag() ); + } + +#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING + + namespace iterator_range_detail + { + template< class Range > + inline iterator_range< BOOST_DEDUCED_TYPENAME range_result_iterator::type > + make_range_impl( Range& r, + BOOST_DEDUCED_TYPENAME range_difference::type advance_begin, + BOOST_DEDUCED_TYPENAME range_difference::type advance_end ) + { + if( advance_begin == 0 && advance_end == 0 ) + return make_iterator_range( r ); + + BOOST_DEDUCED_TYPENAME range_result_iterator::type + new_begin = boost::begin( r ), + new_end = boost::end( r ); + std::advance( new_begin, advance_begin ); + std::advance( new_end, advance_end ); + return make_iterator_range( new_begin, new_end ); + } + } + +#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING + + template< class Range > + inline iterator_range< BOOST_DEDUCED_TYPENAME range_result_iterator::type > + make_iterator_range( Range& r, + BOOST_DEDUCED_TYPENAME range_difference::type advance_begin, + BOOST_DEDUCED_TYPENAME range_difference::type advance_end ) + { + //BOOST_ASSERT( advance_begin - advance_end <= size(r) && "creating invalid range" ); + return iterator_range_detail::make_range_impl( r, advance_begin, advance_end ); + } + +#else + + template< class Range > + inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator::type > + make_iterator_range( Range& r, + BOOST_DEDUCED_TYPENAME range_difference::type advance_begin, + BOOST_DEDUCED_TYPENAME range_difference::type advance_end ) + { + //BOOST_ASSERT( advance_begin - advance_end <= size(r) && "creating invalid range" ); + return iterator_range_detail::make_range_impl( r, advance_begin, advance_end ); + } + + template< class Range > + inline iterator_range< BOOST_DEDUCED_TYPENAME range_const_iterator::type > + make_iterator_range( const Range& r, + BOOST_DEDUCED_TYPENAME range_difference::type advance_begin, + BOOST_DEDUCED_TYPENAME range_difference::type advance_end ) + { + //BOOST_ASSERT( advance_begin - advance_end <= size(r) && "creating invalid range" ); + return iterator_range_detail::make_range_impl( r, advance_begin, advance_end ); + } + +#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING + + //! copy a range into a sequence + /*! + Construct a new sequence of the specified type from the elements + in the given range + + \param Range An input range + \return New sequence + */ + template< typename SeqT, typename Range > + inline SeqT copy_range( const Range& r ) + { + return SeqT( boost::begin( r ), boost::end( r ) ); + } + +} // namespace 'boost' + +#undef BOOST_OLD_IOSTREAMS + +#endif