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[SVN r20853]
This commit is contained in:
Dave Abrahams
2003-11-19 04:25:17 +00:00
parent cd37eb3bfb
commit 62b70f57a9
11 changed files with 369 additions and 232 deletions
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include/boost/iterator/counting_iterator.hpp
+21 -19
View File
@@ -15,7 +15,7 @@
namespace boost {
template <class Incrementable, class Category, class Difference> class counting_iterator;
template <class Incrementable, class Traversal, class Difference> class counting_iterator;
namespace detail
{
@@ -67,35 +67,37 @@ namespace detail
};
BOOST_STATIC_ASSERT(is_numeric<int>::value);
template <class Incrementable, class Category, class Difference>
template <class Incrementable, class Traversal, class Difference>
struct counting_iterator_base
{
typedef typename mpl::apply_if<
is_same<Category, use_default>
typedef typename detail::ia_dflt_help<
Traversal
, mpl::apply_if<
is_numeric<Incrementable>
, mpl::identity<std::random_access_iterator_tag>
, BOOST_ITERATOR_CATEGORY<Incrementable>
, mpl::identity<random_access_traversal_tag>
, iterator_traversal<Incrementable>
>
, mpl::identity<Category>
>::type category;
>::type traversal;
typedef typename mpl::apply_if<
is_same<Difference, use_default>
typedef typename detail::ia_dflt_help<
Difference
, mpl::apply_if<
is_numeric<Incrementable>
, numeric_difference<Incrementable>
, iterator_difference<Incrementable>
>
, mpl::identity<Difference>
>::type difference;
typedef iterator_adaptor<
counting_iterator<Incrementable, Category, Difference> // self
, Incrementable // Base
, Incrementable // value_type
, category
, Incrementable const& // reference
counting_iterator<Incrementable, Traversal, Difference> // self
, Incrementable // Base
, Incrementable // Value
# ifndef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
const // MSVC won't strip this. Instead we enable Thomas'
// criterion (see boost/iterator/detail/facade_iterator_category.hpp)
# endif
, traversal
, Incrementable const& // reference
, difference
> type;
};
@@ -128,11 +130,11 @@ namespace detail
};
}
template <class Incrementable, class Category = use_default, class Difference = use_default>
template <class Incrementable, class Traversal = use_default, class Difference = use_default>
class counting_iterator
: public detail::counting_iterator_base<Incrementable, Category, Difference>::type
: public detail::counting_iterator_base<Incrementable, Traversal, Difference>::type
{
typedef typename detail::counting_iterator_base<Incrementable, Category, Difference>::type super_t;
typedef typename detail::counting_iterator_base<Incrementable, Traversal, Difference>::type super_t;
friend class iterator_core_access;
public: