1 

     2 #ifndef BOOST_MPL_EMPTY_SEQUENCE_HPP_INCLUDED

     3 #define BOOST_MPL_EMPTY_SEQUENCE_HPP_INCLUDED

     4 

     5 // Copyright Aleksey Gurtovoy 2004

     6 // Copyright Alexander Nasonov 2004

     7 //

     8 // Distributed under the Boost Software License, Version 1.0. 

     9 // (See accompanying file LICENSE_1_0.txt or copy at 

    10 // http://www.boost.org/LICENSE_1_0.txt)

    11 //

    12 // See http://www.boost.org/libs/mpl for documentation.

    13 

    14 // $Source: /cvsroot/boost/boost/boost/mpl/empty_sequence.hpp,v $

    15 // $Date: 2004/11/28 01:53:40 $

    16 // $Revision: 1.2 $

    17 

    18 #include <boost/mpl/size_fwd.hpp>

    19 #include <boost/mpl/int.hpp>

    20 #include <boost/mpl/iterator_tags.hpp>

    21 

    22 namespace boost { namespace mpl {

    23 

    24 struct empty_sequence

    25 {

    26     struct tag; 

    27     struct begin { typedef random_access_iterator_tag category; };    

    28     typedef begin end;

    29 };

    30 

    31 template<>

    32 struct size_impl<empty_sequence::tag>

    33 {

    34     template< typename Sequence > struct apply

    35         : int_<0>

    36     {

    37     };

    38 };

    39 

    40 }}

    41 

    42 #endif // #ifndef BOOST_MPL_EMPTY_SEQUENCE_HPP_INCLUDED