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: fold.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
15 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
16 // $Revision: 49267 $
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 
24 namespace boost { namespace mpl {
25 
26 template<
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     >
31 struct 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 
44 BOOST_MPL_AUX_NA_SPEC(3, fold)
45 
46 }}
47 
48 #endif // BOOST_MPL_FOLD_HPP_INCLUDED
49