namespace llvm {
+template <typename Range>
+struct range_traits {
+ typedef typename Range::difference_type difference_type;
+};
+
/// \brief A range adaptor for a pair of iterators.
///
/// This just wraps two iterators into a range-compatible interface. Nothing
IteratorT begin_iterator, end_iterator;
public:
+ // FIXME: We should be using iterator_traits to determine the
+ // difference_type, but most of our iterators do not expose anything like it.
+ typedef int difference_type;
+
iterator_range() {}
iterator_range(IteratorT begin_iterator, IteratorT end_iterator)
: begin_iterator(std::move(begin_iterator)),
IteratorT end() const { return end_iterator; }
};
+/// \brief Determine the distance between the end() and begin() iterators of
+/// a range. Analogous to std::distance().
+template <class Range>\r
+typename range_traits<Range>::difference_type distance(Range R) {\r
+ return std::distance(R.begin(), R.end());\r
+}
+
+/// \brief Copies members of a range into the output iterator provided.
+/// Analogous to std::copy.
+template <class Range, class OutputIterator>
+OutputIterator copy(Range In, OutputIterator Result) {
+ return std::copy(In.begin(), In.end(), Result);
+}
}
#endif