1
2#ifndef BOOST_MPL_FOLD_HPP_INCLUDED
3#define BOOST_MPL_FOLD_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2001-2004
6// Copyright David Abrahams 2001-2002
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// $Id$
15// $Date$
16// $Revision$
17
18#include <boost/mpl/begin_end.hpp>
19#include <boost/mpl/O1_size.hpp>
20#include <boost/mpl/aux_/fold_impl.hpp>
21#include <boost/mpl/aux_/na_spec.hpp>
22#include <boost/mpl/aux_/lambda_support.hpp>
23
24namespace boost { namespace mpl {
25
26template<
27 typename BOOST_MPL_AUX_NA_PARAM(Sequence)
28 , typename BOOST_MPL_AUX_NA_PARAM(State)
29 , typename BOOST_MPL_AUX_NA_PARAM(ForwardOp)
30 >
31struct fold
32{
33 typedef typename aux::fold_impl<
34 ::boost::mpl::O1_size<Sequence>::value
35 , typename begin<Sequence>::type
36 , typename end<Sequence>::type
37 , State
38 , ForwardOp
39 >::state type;
40
41 BOOST_MPL_AUX_LAMBDA_SUPPORT(3,fold,(Sequence,State,ForwardOp))
42};
43
44BOOST_MPL_AUX_NA_SPEC(3, fold)
45
46}}
47
48#endif // BOOST_MPL_FOLD_HPP_INCLUDED
49

source code of include/boost/mpl/fold.hpp