| |
| #ifndef BOOST_MPL_SWITCH_HPP_INCLUDED |
| #define BOOST_MPL_SWITCH_HPP_INCLUDED |
| |
| // Copyright Aleksey Gurtovoy 2003-2004 |
| // |
| // Distributed under the Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // See http://www.boost.org/libs/mpl for documentation. |
| |
| // $Id: switch.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
| // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
| // $Revision: 49267 $ |
| |
| #include <boost/mpl/find_if.hpp> |
| #include <boost/mpl/deref.hpp> |
| #include <boost/mpl/lambda.hpp> |
| #include <boost/mpl/apply.hpp> |
| #include <boost/mpl/pair.hpp> |
| #include <boost/mpl/aux_/na_spec.hpp> |
| #include <boost/mpl/aux_/lambda_support.hpp> |
| |
| namespace boost { namespace mpl { |
| |
| template< |
| typename BOOST_MPL_AUX_NA_PARAM(Body) |
| , typename BOOST_MPL_AUX_NA_PARAM(T) |
| > |
| struct switch_ |
| { |
| typedef typename find_if< |
| Body |
| , apply1< lambda< first<_1> >, T > |
| >::type iter_; |
| |
| typedef typename deref<iter_>::type pair_; |
| typedef typename lambda< typename second<pair_>::type >::type f_; |
| typedef typename apply1<f_,T>::type type; |
| |
| BOOST_MPL_AUX_LAMBDA_SUPPORT(2,switch_,(Body,T)) |
| }; |
| |
| BOOST_MPL_AUX_NA_SPEC(2, switch_) |
| |
| }} |
| |
| #endif // BOOST_MPL_SWITCH_HPP_INCLUDED |