1 2 #ifndef BOOST_MPL_AS_SEQUENCE_HPP_INCLUDED 3 #define BOOST_MPL_AS_SEQUENCE_HPP_INCLUDED 4 5 // Copyright Aleksey Gurtovoy 2002-2004 6 // 7 // Distributed under the Boost Software License, Version 1.0. 8 // (See accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 // 11 // See http://www.boost.org/libs/mpl for documentation. 12 13 // $Id$ 14 // $Date$ 15 // $Revision$ 16 17 #include <boost/mpl/is_sequence.hpp> 18 #include <boost/mpl/single_view.hpp> 19 #include <boost/mpl/if.hpp> 20 #include <boost/mpl/aux_/na_spec.hpp> 21 #include <boost/mpl/aux_/lambda_support.hpp> 22 23 namespace boost { namespace mpl { 24 25 template< 26 typename BOOST_MPL_AUX_NA_PARAM(T) 27 > 28 struct as_sequence 29 : if_< is_sequence<T>, T, single_view<T> > 30 { 31 BOOST_MPL_AUX_LAMBDA_SUPPORT(1,as_sequence,(T)) 32 }; 33 34 BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, as_sequence) 35 36 }} 37 38 #endif // BOOST_MPL_AS_SEQUENCE_HPP_INCLUDED 39