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1 \r
2 #ifndef BOOST_MPL_FOLD_HPP_INCLUDED\r
3 #define BOOST_MPL_FOLD_HPP_INCLUDED\r
4 \r
5 // Copyright Aleksey Gurtovoy 2001-2004\r
6 // Copyright David Abrahams 2001-2002\r
7 //\r
8 // Distributed under the Boost Software License, Version 1.0. \r
9 // (See accompanying file LICENSE_1_0.txt or copy at \r
10 // http://www.boost.org/LICENSE_1_0.txt)\r
11 //\r
12 // See http://www.boost.org/libs/mpl for documentation.\r
13 \r
14 // $Id: fold.hpp 49267 2008-10-11 06:19:02Z agurtovoy $\r
15 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $\r
16 // $Revision: 49267 $\r
17 \r
18 #include <boost/mpl/begin_end.hpp>\r
19 #include <boost/mpl/O1_size.hpp>\r
20 #include <boost/mpl/aux_/fold_impl.hpp>\r
21 #include <boost/mpl/aux_/na_spec.hpp>\r
22 #include <boost/mpl/aux_/lambda_support.hpp>\r
23 \r
24 namespace boost { namespace mpl {\r
25 \r
26 template<\r
27       typename BOOST_MPL_AUX_NA_PARAM(Sequence)\r
28     , typename BOOST_MPL_AUX_NA_PARAM(State)\r
29     , typename BOOST_MPL_AUX_NA_PARAM(ForwardOp)\r
30     >\r
31 struct fold\r
32 {\r
33     typedef typename aux::fold_impl<\r
34           ::boost::mpl::O1_size<Sequence>::value\r
35         , typename begin<Sequence>::type\r
36         , typename end<Sequence>::type\r
37         , State\r
38         , ForwardOp\r
39         >::state type;\r
40 \r
41     BOOST_MPL_AUX_LAMBDA_SUPPORT(3,fold,(Sequence,State,ForwardOp))\r
42 };\r
43 \r
44 BOOST_MPL_AUX_NA_SPEC(3, fold)\r
45 \r
46 }}\r
47 \r
48 #endif // BOOST_MPL_FOLD_HPP_INCLUDED\r