SCARY/N2913 iterator support between the multi and non-multi versions of the associative and unordered containers. I beleive lack of support for this was accidentally recently introduced (by me) and this is fixing a regression. This time tests are put in to prevent such a regression in the future.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@191692 91177308-0d34-0410-b5e6-96231b3b80d8

test/containers/unord/unord.multimap/scary.pass.cpp

@@ -0,0 +1,24 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <unordered_map>
+
+// class unordered_map class unordered_multimap
+
+// Extension:  SCARY/N2913 iterator compatibility between unordered_map and unordered_multimap
+
+#include <unordered_map>
+
+int main()
+{
+    typedef std::unordered_map<int, int> M1;
+    typedef std::unordered_multimap<int, int> M2;
+    M2::iterator i;
+    M1::iterator j = i;
+}