/*============================================================================= | |
Copyright (c) 2005 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_ITERATOR_07172005_0849) | |
#define FUSION_CONS_ITERATOR_07172005_0849 | |
#include <boost/type_traits/add_const.hpp> | |
#include <boost/fusion/support/iterator_base.hpp> | |
#include <boost/fusion/container/list/detail/deref_impl.hpp> | |
#include <boost/fusion/container/list/detail/next_impl.hpp> | |
#include <boost/fusion/container/list/detail/value_of_impl.hpp> | |
#include <boost/fusion/container/list/detail/equal_to_impl.hpp> | |
#include <boost/fusion/container/list/list_fwd.hpp> | |
namespace boost { namespace fusion | |
{ | |
struct nil; | |
struct cons_iterator_tag; | |
struct forward_traversal_tag; | |
template <typename Cons> | |
struct cons_iterator_identity; | |
template <typename Cons = nil> | |
struct cons_iterator : iterator_base<cons_iterator<Cons> > | |
{ | |
typedef cons_iterator_tag fusion_tag; | |
typedef forward_traversal_tag category; | |
typedef Cons cons_type; | |
typedef cons_iterator_identity< | |
typename add_const<Cons>::type> | |
identity; | |
explicit cons_iterator(cons_type& in_cons) | |
: cons(in_cons) {} | |
cons_type& cons; | |
private: | |
// silence MSVC warning C4512: assignment operator could not be generated | |
cons_iterator& operator= (cons_iterator const&); | |
}; | |
struct nil_iterator : iterator_base<nil_iterator> | |
{ | |
typedef forward_traversal_tag category; | |
typedef cons_iterator_tag fusion_tag; | |
typedef nil cons_type; | |
typedef cons_iterator_identity< | |
add_const<nil>::type> | |
identity; | |
nil_iterator() {} | |
explicit nil_iterator(nil const&) {} | |
}; | |
template <> | |
struct cons_iterator<nil> : nil_iterator | |
{ | |
cons_iterator() {} | |
explicit cons_iterator(nil const&) {} | |
}; | |
template <> | |
struct cons_iterator<nil const> : nil_iterator | |
{ | |
cons_iterator() {} | |
explicit cons_iterator(nil const&) {} | |
}; | |
template <> | |
struct cons_iterator<list<> > : nil_iterator | |
{ | |
cons_iterator() {} | |
explicit cons_iterator(nil const&) {} | |
}; | |
template <> | |
struct cons_iterator<list<> const> : nil_iterator | |
{ | |
cons_iterator() {} | |
explicit cons_iterator(nil const&) {} | |
}; | |
}} | |
#endif |