summaryrefslogtreecommitdiff
path: root/boost/fusion/adapted/boost_array/array_iterator.hpp
diff options
context:
space:
mode:
Diffstat (limited to 'boost/fusion/adapted/boost_array/array_iterator.hpp')
-rw-r--r--boost/fusion/adapted/boost_array/array_iterator.hpp107
1 files changed, 107 insertions, 0 deletions
diff --git a/boost/fusion/adapted/boost_array/array_iterator.hpp b/boost/fusion/adapted/boost_array/array_iterator.hpp
new file mode 100644
index 0000000000..1246144980
--- /dev/null
+++ b/boost/fusion/adapted/boost_array/array_iterator.hpp
@@ -0,0 +1,107 @@
+/*=============================================================================
+ Copyright (c) 2001-2011 Joel de Guzman
+ Copyright (c) 2005-2006 Dan Marsden
+
+ 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(BOOST_FUSION_ARRAY_ITERATOR_26122005_2250)
+#define BOOST_FUSION_ARRAY_ITERATOR_26122005_2250
+
+#include <cstddef>
+#include <boost/config.hpp>
+#include <boost/mpl/int.hpp>
+#include <boost/mpl/assert.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/minus.hpp>
+#include <boost/type_traits/is_const.hpp>
+#include <boost/fusion/iterator/iterator_facade.hpp>
+
+namespace boost { namespace fusion
+{
+ struct random_access_traversal_tag;
+
+ template <typename Array, int Pos>
+ struct array_iterator
+ : iterator_facade<array_iterator<Array, Pos>, random_access_traversal_tag>
+ {
+ BOOST_MPL_ASSERT_RELATION(Pos, >=, 0);
+ BOOST_MPL_ASSERT_RELATION(Pos, <=, static_cast<int>(Array::static_size));
+
+ typedef mpl::int_<Pos> index;
+ typedef Array array_type;
+
+ array_iterator(Array& a)
+ : array(a) {}
+
+ Array& array;
+
+ template <typename Iterator>
+ struct value_of
+ {
+ typedef typename Iterator::array_type array_type;
+ typedef typename array_type::value_type type;
+ };
+
+ template <typename Iterator>
+ struct deref
+ {
+ typedef typename Iterator::array_type array_type;
+ typedef typename
+ mpl::if_<
+ is_const<array_type>
+ , typename array_type::const_reference
+ , typename array_type::reference
+ >::type
+ type;
+
+ static type
+ call(Iterator const & it)
+ {
+ return it.array[Iterator::index::value];
+ }
+ };
+
+ template <typename Iterator, typename N>
+ struct advance
+ {
+ typedef typename Iterator::index index;
+ typedef typename Iterator::array_type array_type;
+ typedef array_iterator<array_type, index::value + N::value> type;
+
+ static type
+ call(Iterator const& i)
+ {
+ return type(i.array);
+ }
+ };
+
+ template <typename Iterator>
+ struct next : advance<Iterator, mpl::int_<1> > {};
+
+ template <typename Iterator>
+ struct prior : advance<Iterator, mpl::int_<-1> > {};
+
+ template <typename I1, typename I2>
+ struct distance : mpl::minus<typename I2::index, typename I1::index>
+ {
+ typedef typename
+ mpl::minus<
+ typename I2::index, typename I1::index
+ >::type
+ type;
+
+ static type
+ call(I1 const&, I2 const&)
+ {
+ return type();
+ }
+ };
+
+ private:
+
+ array_iterator<Array, Pos>& operator=(array_iterator<Array, Pos> const&);
+ };
+}}
+
+#endif