1 files changed, 44 insertions, 0 deletions
diff --git a/test/std/iterators/iterator.primitives/iterator.operations/prev.pass.cpp b/test/std/iterators/iterator.primitives/iterator.operations/prev.pass.cpp
new file mode 100644
index 000000000000..0641706c928b
--- /dev/null
+++ b/test/std/iterators/iterator.primitives/iterator.operations/prev.pass.cpp
@@ -0,0 +1,44 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <iterator>
+
+// template <BidirectionalIterator Iter>
+//   Iter prev(Iter x, Iter::difference_type n = 1);
+
+#include <iterator>
+#include <cassert>
+
+#include "test_iterators.h"
+
+template <class It>
+void
+test(It i, typename std::iterator_traits<It>::difference_type n, It x)
+{
+    assert(std::prev(i, n) == x);
+}
+
+template <class It>
+void
+test(It i, It x)
+{
+    assert(std::prev(i) == x);
+}
+
+int main()
+{
+    const char* s = "1234567890";
+    test(bidirectional_iterator<const char*>(s+10), 10, bidirectional_iterator<const char*>(s));
+    test(random_access_iterator<const char*>(s+10), 10, random_access_iterator<const char*>(s));
+    test(s+10, 10, s);
+
+    test(bidirectional_iterator<const char*>(s+1), bidirectional_iterator<const char*>(s));
+    test(random_access_iterator<const char*>(s+1), random_access_iterator<const char*>(s));
+    test(s+1, s);
+}