1 files changed, 98 insertions, 0 deletions
diff --git a/libcxx/test/containers/associative/multiset/equal_range.pass.cpp b/libcxx/test/containers/associative/multiset/equal_range.pass.cpp
new file mode 100644
index 00000000000..7abfa9282d3
--- /dev/null
+++ b/libcxx/test/containers/associative/multiset/equal_range.pass.cpp
@@ -0,0 +1,98 @@
+//===----------------------------------------------------------------------===//
+//
+// 适适适适适适适适适适The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <set>
+
+// class multiset
+
+// pair<iterator,iterator>             equal_range(const key_type& k);
+// pair<const_iterator,const_iterator> equal_range(const key_type& k) const;
+
+#include <set>
+#include <cassert>
+
+int main()
+{
+    typedef int V;
+    typedef std::multiset<int> M;
+    {
+        typedef std::pair<M::iterator, M::iterator> R;
+        V ar[] =
+        {
+            5,
+            5,
+            5,
+            7,
+            7,
+            7,
+            9,
+            9,
+            9
+        };
+        M m(ar, ar+sizeof(ar)/sizeof(ar[0]));
+        R r = m.equal_range(4);
+        assert(r.first  == next(m.begin(), 0));
+        assert(r.second == next(m.begin(), 0));
+        r = m.equal_range(5);
+        assert(r.first  == next(m.begin(), 0));
+        assert(r.second == next(m.begin(), 3));
+        r = m.equal_range(6);
+        assert(r.first  == next(m.begin(), 3));
+        assert(r.second == next(m.begin(), 3));
+        r = m.equal_range(7);
+        assert(r.first  == next(m.begin(), 3));
+        assert(r.second == next(m.begin(), 6));
+        r = m.equal_range(8);
+        assert(r.first  == next(m.begin(), 6));
+        assert(r.second == next(m.begin(), 6));
+        r = m.equal_range(9);
+        assert(r.first  == next(m.begin(), 6));
+        assert(r.second == next(m.begin(), 9));
+        r = m.equal_range(10);
+        assert(r.first  == next(m.begin(), 9));
+        assert(r.second == next(m.begin(), 9));
+    }
+    {
+        typedef std::pair<M::const_iterator, M::const_iterator> R;
+        V ar[] =
+        {
+            5,
+            5,
+            5,
+            7,
+            7,
+            7,
+            9,
+            9,
+            9
+        };
+        M m(ar, ar+sizeof(ar)/sizeof(ar[0]));
+        R r = m.equal_range(4);
+        assert(r.first  == next(m.begin(), 0));
+        assert(r.second == next(m.begin(), 0));
+        r = m.equal_range(5);
+        assert(r.first  == next(m.begin(), 0));
+        assert(r.second == next(m.begin(), 3));
+        r = m.equal_range(6);
+        assert(r.first  == next(m.begin(), 3));
+        assert(r.second == next(m.begin(), 3));
+        r = m.equal_range(7);
+        assert(r.first  == next(m.begin(), 3));
+        assert(r.second == next(m.begin(), 6));
+        r = m.equal_range(8);
+        assert(r.first  == next(m.begin(), 6));
+        assert(r.second == next(m.begin(), 6));
+        r = m.equal_range(9);
+        assert(r.first  == next(m.begin(), 6));
+        assert(r.second == next(m.begin(), 9));
+        r = m.equal_range(10);
+        assert(r.first  == next(m.begin(), 9));
+        assert(r.second == next(m.begin(), 9));
+    }
+}