ceph/src/boost/libs/mpl/include/boost/mpl/aux_/fold_op.hpp

   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 // $Id$
  14 // $Date$
  15 // $Revision$
  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