boost/mpl/fold.hpp

0001
0002 #ifndef BOOST_MPL_FOLD_HPP_INCLUDED
0003 #define BOOST_MPL_FOLD_HPP_INCLUDED
0004
0005 // Copyright Aleksey Gurtovoy 2001-2004
0006 // Copyright David Abrahams 2001-2002
0007 //
0008 // Distributed under the Boost Software License, Version 1.0.
0009 // (See accompanying file LICENSE_1_0.txt or copy at
0010 // http://www.boost.org/LICENSE_1_0.txt)
0011 //
0012 // See http://www.boost.org/libs/mpl for documentation.
0013
0014 // $Id$
0015 // $Date$
0016 // $Revision$
0017
0018 #include <boost/mpl/begin_end.hpp>
0019 #include <boost/mpl/O1_size.hpp>
0020 #include <boost/mpl/aux_/fold_impl.hpp>
0021 #include <boost/mpl/aux_/na_spec.hpp>
0022 #include <boost/mpl/aux_/lambda_support.hpp>
0023
0024 namespace boost { namespace mpl {
0025
0026 template<
0027       typename BOOST_MPL_AUX_NA_PARAM(Sequence)
0028     , typename BOOST_MPL_AUX_NA_PARAM(State)
0029     , typename BOOST_MPL_AUX_NA_PARAM(ForwardOp)
0030     >
0031 struct fold
0032 {
0033     typedef typename aux::fold_impl<
0034           ::boost::mpl::O1_size<Sequence>::value
0035         , typename begin<Sequence>::type
0036         , typename end<Sequence>::type
0037         , State
0038         , ForwardOp
0039         >::state type;
0040
0041     BOOST_MPL_AUX_LAMBDA_SUPPORT(3,fold,(Sequence,State,ForwardOp))
0042 };
0043
0044 BOOST_MPL_AUX_NA_SPEC(3, fold)
0045
0046 }}
0047
0048 #endif // BOOST_MPL_FOLD_HPP_INCLUDED