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support const_iterator_cast: reverse_iterator

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bolero-MURAKAMI 2014-01-05 22:57:41 +09:00
parent cd72873c3a
commit a43b9f3faa
1 changed files with 22 additions and 0 deletions
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22
sprout/iterator/reverse_iterator.hpp
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@ -14,7 +14,9 @@
#include <sprout/iterator/next.hpp> #include <sprout/iterator/next.hpp>
#include <sprout/iterator/prev.hpp> #include <sprout/iterator/prev.hpp>
#include <sprout/iterator/distance.hpp> #include <sprout/iterator/distance.hpp>
#include <sprout/iterator/const_iterator_cast.hpp>
#include <sprout/utility/swap.hpp> #include <sprout/utility/swap.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout { namespace sprout {
// //
@ -200,6 +202,26 @@ namespace sprout {
iterator_prev(sprout::reverse_iterator<Iterator> const& it) { iterator_prev(sprout::reverse_iterator<Iterator> const& it) {
return it.prev(); return it.prev();
} }
//
// is_const_iterator_cast_convertible
//
template<typename FromIterator, typename ToIterator>
struct is_const_iterator_cast_convertible<sprout::reverse_iterator<FromIterator>, sprout::reverse_iterator<ToIterator> >
: public sprout::is_const_iterator_cast_convertible<FromIterator, ToIterator>
{};
//
// const_iterator_conversion
//
template<
typename T,
typename Iterator,
typename sprout::enabler_if<sprout::is_const_iterator_cast_convertible<sprout::reverse_iterator<Iterator>, T>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR T
const_iterator_conversion(sprout::reverse_iterator<Iterator> const& it) {
return T(sprout::const_iterator_cast<typename T::iterator_type>(it.base()));
}
} // namespace sprout } // namespace sprout
#endif // #ifndef SPROUT_ITERATOR_REVERSE_ITERATOR_HPP #endif // #ifndef SPROUT_ITERATOR_REVERSE_ITERATOR_HPP