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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/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/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/utility/enable_if.hpp>
#include <boost/fusion/support/sequence_base.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/or.hpp>
namespace boost { namespace fusion
{
struct void_;
struct cons_tag;
struct forward_traversal_tag;
struct fusion_sequence_tag;
struct nil : sequence_base<nil>
{
typedef mpl::int_<0> 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 void_ car_type;
typedef void_ cdr_type;
nil() {}
template <typename Iterator>
nil(Iterator const& /*iter*/, mpl::true_ /*this_is_an_iterator*/)
{}
template <typename Iterator>
void assign_from_iter(Iterator const& /*iter*/)
{
}
};
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;
cons()
: car(), cdr() {}
explicit cons(typename detail::call_param<Car>::type in_car)
: car(in_car), cdr() {}
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>
cons(cons<Car2, Cdr2> const& rhs)
: car(rhs.car), cdr(rhs.cdr) {}
cons(cons const& rhs)
: car(rhs.car), cdr(rhs.cdr) {}
template <typename Sequence>
cons(
Sequence const& seq
, typename boost::disable_if<
mpl::or_<
is_convertible<Sequence, cons> // use copy ctor instead
, is_convertible<Sequence, Car> // use copy to car instead
>
>::type* /*dummy*/ = 0
)
: car(*fusion::begin(seq))
, cdr(fusion::next(fusion::begin(seq)), mpl::true_()) {}
template <typename Iterator>
cons(Iterator const& iter, mpl::true_ /*this_is_an_iterator*/)
: car(*iter)
, cdr(fusion::next(iter), mpl::true_()) {}
template <typename Car2, typename Cdr2>
cons& operator=(cons<Car2, Cdr2> const& rhs)
{
car = rhs.car;
cdr = rhs.cdr;
return *this;
}
cons& operator=(cons const& rhs)
{
car = rhs.car;
cdr = rhs.cdr;
return *this;
}
template <typename Sequence>
typename boost::disable_if<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>
void assign_from_iter(Iterator const& iter)
{
car = *iter;
cdr.assign_from_iter(fusion::next(iter));
}
car_type car;
cdr_type cdr;
};
}}
#endif
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Swift