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/*============================================================================= Copyright (c) 2001-2011 Joel de Guzman Copyright (c) 2005 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) ==============================================================================*/ #if !defined(FUSION_CONS_07172005_0843) #define FUSION_CONS_07172005_0843 #include <boost/fusion/support/config.hpp> #include <boost/fusion/support/void.hpp> #include <boost/fusion/support/detail/enabler.hpp> #include <boost/fusion/container/list/cons_fwd.hpp> #include <boost/fusion/support/detail/access.hpp> #include <boost/fusion/sequence/intrinsic/begin.hpp> #include <boost/fusion/sequence/intrinsic/end.hpp> #include <boost/fusion/iterator/next.hpp> #include <boost/fusion/iterator/deref.hpp> #include <boost/fusion/container/list/nil.hpp> #include <boost/fusion/container/list/cons_iterator.hpp> #include <boost/fusion/container/list/detail/begin_impl.hpp> #include <boost/fusion/container/list/detail/end_impl.hpp> #include <boost/fusion/container/list/detail/at_impl.hpp> #include <boost/fusion/container/list/detail/value_at_impl.hpp> #include <boost/fusion/container/list/detail/empty_impl.hpp> #include <boost/type_traits/is_convertible.hpp> #include <boost/type_traits/is_base_of.hpp> #include <boost/utility/enable_if.hpp> #include <boost/fusion/support/sequence_base.hpp> #include <boost/fusion/support/is_sequence.hpp> #include <boost/mpl/int.hpp> #include <boost/mpl/bool.hpp> #include <boost/mpl/and.hpp> #include <boost/mpl/not.hpp> namespace boost { namespace fusion { struct cons_tag; struct forward_traversal_tag; struct fusion_sequence_tag; template <typename Car, typename Cdr /*= nil_*/> struct cons : sequence_base<cons<Car, Cdr> > { typedef mpl::int_<Cdr::size::value+1> size; typedef cons_tag fusion_tag; typedef fusion_sequence_tag tag; // this gets picked up by MPL typedef mpl::false_ is_view; typedef forward_traversal_tag category; typedef Car car_type; typedef Cdr cdr_type; BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED cons() : car(), cdr() {} BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED explicit cons(typename detail::call_param<Car>::type in_car) : car(in_car), cdr() {} BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED cons( typename detail::call_param<Car>::type in_car , typename detail::call_param<Cdr>::type in_cdr) : car(in_car), cdr(in_cdr) {} template <typename Car2, typename Cdr2> BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED cons(cons<Car2, Cdr2> const& rhs) : car(rhs.car), cdr(rhs.cdr) {} #if BOOST_WORKAROUND(BOOST_GCC, / 100 == 406) && !defined(BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS) // Workaround for `array used as initializer` compile error on gcc 4.6 w/ c++0x. template <typename = void> #endif BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED cons(cons const& rhs) : car(rhs.car), cdr(rhs.cdr) {} template <typename Sequence> BOOST_FUSION_GPU_ENABLED cons( Sequence const& seq , typename boost::enable_if< mpl::and_< traits::is_sequence<Sequence> , mpl::not_<is_base_of<cons, Sequence> > , mpl::not_<is_convertible<Sequence, Car> > > // use copy to car instead , detail::enabler_ >::type = detail::enabler ) : car(*fusion::begin(seq)) , cdr(fusion::next(fusion::begin(seq)), mpl::true_()) {} template <typename Iterator> BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED cons(Iterator const& iter, mpl::true_ /*this_is_an_iterator*/) : car(*iter) , cdr(fusion::next(iter), mpl::true_()) {} template <typename Car2, typename Cdr2> BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED cons& operator=(cons<Car2, Cdr2> const& rhs) { car = rhs.car; cdr = rhs.cdr; return *this; } BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED cons& operator=(cons const& rhs) { car = rhs.car; cdr = rhs.cdr; return *this; } template <typename Sequence> BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED typename boost::enable_if< mpl::and_< traits::is_sequence<Sequence> , mpl::not_<is_convertible<Sequence, Car> > > , cons&>::type operator=(Sequence const& seq) { typedef typename result_of::begin<Sequence const>::type Iterator; Iterator iter = fusion::begin(seq); this->assign_from_iter(iter); return *this; } template <typename Iterator> BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED void assign_from_iter(Iterator const& iter) { car = *iter; cdr.assign_from_iter(fusion::next(iter)); } car_type car; cdr_type cdr; }; }} #endif