1 

     2 #ifndef BOOST_MPL_AUX_FOLD_OP_HPP_INCLUDED

     3 #define BOOST_MPL_AUX_FOLD_OP_HPP_INCLUDED

     4 

     5 // Copyright Aleksey Gurtovoy 2001-2004

     6 //

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

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

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

    10 //

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

    12 

    13 // $Source: /cvsroot/boost/boost/boost/mpl/aux_/fold_op.hpp,v $

    14 // $Date: 2004/09/02 15:40:43 $

    15 // $Revision: 1.4 $

    16 

    17 #include <boost/mpl/apply.hpp>

    18 

    19 namespace boost { namespace mpl { namespace aux {

    20 

    21 // hand-written version is more efficient than bind/lambda expression

    22 template< typename Op >

    23 struct fold_op

    24 {

    25     template< typename T1, typename T2 > struct apply

    26     {

    27         typedef typename apply2<

    28               Op

    29             , T1

    30             , typename T2::type

    31             >::type type;

    32     };

    33 };

    34 

    35 }}}

    36 

    37 #endif // BOOST_MPL_AUX_FOLD_OP_HPP_INCLUDED