/////////////////////////////////////////////////////////////////////////////// /// \file push_front.hpp /// Proto callables Fusion push_front // // Copyright 2010 Eric Niebler. 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) #ifndef BOOST_PROTO_FUNCTIONAL_FUSION_PUSH_FRONT_HPP_EAN_11_27_2010 #define BOOST_PROTO_FUNCTIONAL_FUSION_PUSH_FRONT_HPP_EAN_11_27_2010 #include <boost/type_traits/add_const.hpp> #include <boost/type_traits/remove_const.hpp> #include <boost/type_traits/remove_reference.hpp> #include <boost/fusion/include/push_front.hpp> #include <boost/proto/proto_fwd.hpp> namespace boost { namespace proto { namespace functional { /// \brief A PolymorphicFunctionObject type that invokes the /// \c fusion::push_front() algorithm on its argument. /// /// A PolymorphicFunctionObject type that invokes the /// \c fusion::push_front() algorithm on its argument. struct push_front { BOOST_PROTO_CALLABLE() template<typename Sig> struct result; template<typename This, typename Seq, typename T> struct result<This(Seq, T)> : fusion::result_of::push_front< typename boost::add_const<typename boost::remove_reference<Seq>::type>::type , typename boost::remove_const<typename boost::remove_reference<T>::type>::type > {}; template<typename Seq, typename T> typename fusion::result_of::push_front<Seq const, T>::type operator ()(Seq const &seq, T const &t) const { return fusion::push_front(seq, t); } }; }}} #endif