ext-boost/boost/range/detail/any_iterator_interface.hpp

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2014-12-07 19:44:55 +00:00
// Boost.Range library
//
// Copyright Neil Groves 2010. Use, modification and
// distribution is subject to 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)
//
// For more information, see http://www.boost.org/libs/range/
//
#ifndef BOOST_RANGE_DETAIL_ANY_ITERATOR_INTERFACE_HPP_INCLUDED
#define BOOST_RANGE_DETAIL_ANY_ITERATOR_INTERFACE_HPP_INCLUDED
#include <boost/range/detail/any_iterator_buffer.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/type_traits/is_reference.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_reference.hpp>
namespace boost
{
namespace range_detail
{
template<class T>
struct const_reference_type_generator
{
typedef typename mpl::if_<
typename is_reference<T>::type,
typename add_const<
typename remove_reference<T>::type
>::type&,
T
>::type type;
};
template<class T>
struct mutable_reference_type_generator
{
typedef typename mpl::if_<
typename mpl::and_<
typename is_const<T>::type,
typename mpl::not_<typename is_reference<T>::type>::type
>::type,
T,
typename add_reference<T>::type
>::type type;
};
template<
class Reference
, class Buffer
>
struct any_incrementable_iterator_interface
{
typedef typename mutable_reference_type_generator<
Reference
>::type reference;
typedef typename const_reference_type_generator<
Reference
>::type const_reference;
typedef typename remove_const<
typename remove_reference<Reference>::type
>::type reference_as_value_type;
typedef Buffer buffer_type;
virtual ~any_incrementable_iterator_interface() {}
virtual any_incrementable_iterator_interface*
clone(buffer_type& buffer) const = 0;
virtual any_incrementable_iterator_interface<const_reference, Buffer>*
clone_const_ref(buffer_type& buffer) const = 0;
virtual any_incrementable_iterator_interface<reference_as_value_type, Buffer>*
clone_reference_as_value(buffer_type& buffer) const = 0;
virtual void increment() = 0;
};
template<
class Reference
, class Buffer
>
struct any_single_pass_iterator_interface
: any_incrementable_iterator_interface<Reference, Buffer>
{
typedef typename any_incrementable_iterator_interface<Reference, Buffer>::reference reference;
typedef typename any_incrementable_iterator_interface<Reference, Buffer>::const_reference const_reference;
typedef typename any_incrementable_iterator_interface<Reference, Buffer>::buffer_type buffer_type;
typedef typename any_incrementable_iterator_interface<Reference, Buffer>::reference_as_value_type reference_as_value_type;
virtual any_single_pass_iterator_interface*
clone(buffer_type& buffer) const = 0;
virtual any_single_pass_iterator_interface<const_reference, Buffer>*
clone_const_ref(buffer_type& buffer) const = 0;
virtual any_single_pass_iterator_interface<reference_as_value_type, Buffer>*
clone_reference_as_value(buffer_type& buffer) const = 0;
virtual reference dereference() const = 0;
virtual bool equal(const any_single_pass_iterator_interface& other) const = 0;
};
template<
class Reference
, class Buffer
>
struct any_forward_iterator_interface
: any_single_pass_iterator_interface<Reference, Buffer>
{
typedef typename any_single_pass_iterator_interface<Reference, Buffer>::reference reference;
typedef typename any_single_pass_iterator_interface<Reference, Buffer>::const_reference const_reference;
typedef typename any_single_pass_iterator_interface<Reference, Buffer>::buffer_type buffer_type;
typedef typename any_single_pass_iterator_interface<Reference, Buffer>::reference_as_value_type reference_as_value_type;
virtual any_forward_iterator_interface*
clone(buffer_type& buffer) const = 0;
virtual any_forward_iterator_interface<const_reference, Buffer>*
clone_const_ref(buffer_type& buffer) const = 0;
virtual any_forward_iterator_interface<reference_as_value_type, Buffer>*
clone_reference_as_value(buffer_type& buffer) const = 0;
};
template<
class Reference
, class Buffer
>
struct any_bidirectional_iterator_interface
: any_forward_iterator_interface<Reference, Buffer>
{
typedef typename any_forward_iterator_interface<Reference, Buffer>::reference reference;
typedef typename any_forward_iterator_interface<Reference, Buffer>::const_reference const_reference;
typedef typename any_forward_iterator_interface<Reference, Buffer>::buffer_type buffer_type;
typedef typename any_forward_iterator_interface<Reference, Buffer>::reference_as_value_type reference_as_value_type;
virtual any_bidirectional_iterator_interface*
clone(buffer_type& buffer) const = 0;
virtual any_bidirectional_iterator_interface<const_reference, Buffer>*
clone_const_ref(buffer_type& buffer) const = 0;
virtual any_bidirectional_iterator_interface<reference_as_value_type, Buffer>*
clone_reference_as_value(buffer_type& buffer) const = 0;
virtual void decrement() = 0;
};
template<
class Reference
, class Difference
, class Buffer
>
struct any_random_access_iterator_interface
: any_bidirectional_iterator_interface<
Reference
, Buffer
>
{
typedef typename any_bidirectional_iterator_interface<Reference, Buffer>::reference reference;
typedef typename any_bidirectional_iterator_interface<Reference, Buffer>::const_reference const_reference;
typedef typename any_bidirectional_iterator_interface<Reference, Buffer>::buffer_type buffer_type;
typedef typename any_bidirectional_iterator_interface<Reference, Buffer>::reference_as_value_type reference_as_value_type;
typedef Difference difference_type;
virtual any_random_access_iterator_interface*
clone(buffer_type& buffer) const = 0;
virtual any_random_access_iterator_interface<const_reference, Difference, Buffer>*
clone_const_ref(buffer_type& buffer) const = 0;
virtual any_random_access_iterator_interface<reference_as_value_type, Difference, Buffer>*
clone_reference_as_value(buffer_type& buffer) const = 0;
virtual void advance(Difference offset) = 0;
virtual Difference distance_to(const any_random_access_iterator_interface& other) const = 0;
};
template<
class Traversal
, class Reference
, class Difference
, class Buffer
>
struct any_iterator_interface_type_generator;
template<
class Reference
, class Difference
, class Buffer
>
struct any_iterator_interface_type_generator<
incrementable_traversal_tag
, Reference
, Difference
, Buffer
>
{
typedef any_incrementable_iterator_interface<Reference, Buffer> type;
};
template<
class Reference
, class Difference
, class Buffer
>
struct any_iterator_interface_type_generator<
single_pass_traversal_tag
, Reference
, Difference
, Buffer
>
{
typedef any_single_pass_iterator_interface<Reference, Buffer> type;
};
template<
class Reference
, class Difference
, class Buffer
>
struct any_iterator_interface_type_generator<
forward_traversal_tag
, Reference
, Difference
, Buffer
>
{
typedef any_forward_iterator_interface<Reference, Buffer> type;
};
template<
class Reference
, class Difference
, class Buffer
>
struct any_iterator_interface_type_generator<
bidirectional_traversal_tag
, Reference
, Difference
, Buffer
>
{
typedef any_bidirectional_iterator_interface<Reference, Buffer> type;
};
template<
class Reference
, class Difference
, class Buffer
>
struct any_iterator_interface_type_generator<
random_access_traversal_tag
, Reference
, Difference
, Buffer
>
{
typedef any_random_access_iterator_interface<
Reference
, Difference
, Buffer
> type;
};
} // namespace range_detail
} // namespace boost
#endif // include guard