source: downloads/boost_1_34_1/boost/range/detail/size.hpp @ 56

// Boost.Range library
//
//  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_DETAIL_SIZE_HPP
#define BOOST_RANGE_DETAIL_SIZE_HPP

#include <boost/config.hpp> // BOOST_MSVC
#include <boost/detail/workaround.hpp>
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
# include <boost/range/detail/vc6/size.hpp>
#else
# include <boost/range/detail/implementation_help.hpp>
# include <boost/range/detail/size_type.hpp>
# include <boost/range/detail/common.hpp>
# if BOOST_WORKAROUND(BOOST_MSVC, == 1300)
#  include <boost/range/detail/remove_extent.hpp>
# endif
# include <iterator>

namespace boost 
{
    namespace range_detail
    {
        template< typename T >
        struct range_size_;

        //////////////////////////////////////////////////////////////////////
        // default
        //////////////////////////////////////////////////////////////////////
        
        template<>
        struct range_size_<std_container_>
        {
            template< typename C >
            static BOOST_RANGE_DEDUCED_TYPENAME C::size_type fun( const C& c )
            {
                return c.size();
            };
        };
                    
        //////////////////////////////////////////////////////////////////////
        // pair
        //////////////////////////////////////////////////////////////////////
        
        template<>
        struct range_size_<std_pair_>
        {
            template< typename P >
            static BOOST_RANGE_DEDUCED_TYPENAME range_size<P>::type 
            fun( const P& p )
            {
                return std::distance( p.first, p.second );
            }
        };
 
        //////////////////////////////////////////////////////////////////////
        // array
        //////////////////////////////////////////////////////////////////////
        
        template<>
        struct range_size_<array_>
        {
        #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
            template< typename T, std::size_t sz >
            static std::size_t fun( T BOOST_RANGE_ARRAY_REF()[sz] )
            {
                return sz;
            }
        #else
            template<typename T>
            static std::size_t fun(T& t)
            {
                return remove_extent<T>::size;
            }
        #endif
        };
        
        template<>
        struct range_size_<char_array_>
        {
            template< typename T, std::size_t sz >
            static std::size_t fun( T BOOST_RANGE_ARRAY_REF()[sz] )
            {
                return boost::range_detail::array_size( boost_range_array );
            }
        };
        
        template<>
        struct range_size_<wchar_t_array_>
        {
            template< typename T, std::size_t sz >
            static std::size_t fun( T BOOST_RANGE_ARRAY_REF()[sz] )
            {
                return boost::range_detail::array_size( boost_range_array );
            }
        };

        //////////////////////////////////////////////////////////////////////
        // string
        //////////////////////////////////////////////////////////////////////

        template<>
        struct range_size_<char_ptr_>
        {
            static std::size_t fun( const char* s )
            {
                return boost::range_detail::str_size( s );
            }
        };

        template<>
        struct range_size_<const_char_ptr_>
        {
            static std::size_t fun( const char* s )
            {
                return boost::range_detail::str_size( s );
            }
        };
        
        template<>
        struct range_size_<wchar_t_ptr_>
        {
            static std::size_t fun( const wchar_t* s )
            {
                return boost::range_detail::str_size( s );
            }
        };

        template<>
        struct range_size_<const_wchar_t_ptr_>
        {
            static std::size_t fun( const wchar_t* s )
            {
                return boost::range_detail::str_size( s );
            }
        };
  
    } // namespace 'range_detail'
    

    template< typename C >
    BOOST_RANGE_DEDUCED_TYPENAME range_size<C>::type 
    size( const C& c )
    {
        return range_detail::range_size_<  BOOST_RANGE_DEDUCED_TYPENAME range_detail::range<C>::type >::fun( c );
    }
    
} // namespace 'boost'

# endif
#endif