iterator_range: Add an llvm::make_range() helper method.

Convenience wrapper to make dealing with sub-ranges easier. Like the
iterator_range<> itself, if/when this sort of thing gets standards
blessing, it will be replaced by the official version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205987 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/ADT/iterator_range.h b/include/llvm/ADT/iterator_range.h
index 4f2f3218f3104cfc4369e3db368fdfe0148f306f..6735700e046855dbbe5706b901dc345d8b46d7d7 100644 (file)
--- a/include/llvm/ADT/iterator_range.h
+++ b/include/llvm/ADT/iterator_range.h
@@ -40,6 +40,14 @@ public:
   IteratorT begin() const { return begin_iterator; }
   IteratorT end() const { return end_iterator; }
 };
+
+/// \brief Convenience function for iterating over sub-ranges.
+///
+/// This provides a bit of syntactic sugar to make using sub-ranges
+/// in for loops a bit easier. Analogous to std::make_pair().
+template<class T> iterator_range<T> make_range(const T &x, const T &y) {
+  return (iterator_range<T>(x, y));
+}
 }
 
 #endif