1 files changed, 60 insertions, 0 deletions
diff --git a/test/std/utilities/template.bitset/bitset.members/flip_one.pass.cpp b/test/std/utilities/template.bitset/bitset.members/flip_one.pass.cpp
new file mode 100644
index 0000000000000..3e09b202097d8
--- /dev/null
+++ b/test/std/utilities/template.bitset/bitset.members/flip_one.pass.cpp
@@ -0,0 +1,60 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// test bitset<N>& flip(size_t pos);
+
+#include <bitset>
+#include <cstdlib>
+#include <cassert>
+
+#pragma clang diagnostic ignored "-Wtautological-compare"
+
+template <std::size_t N>
+std::bitset<N>
+make_bitset()
+{
+    std::bitset<N> v;
+    for (std::size_t i = 0; i < N; ++i)
+        v[i] = static_cast<bool>(std::rand() & 1);
+    return v;
+}
+
+template <std::size_t N>
+void test_flip_one()
+{
+    std::bitset<N> v = make_bitset<N>();
+    try
+    {
+        v.flip(50);
+        bool b = v[50];
+        if (50 >= v.size())
+            assert(false);
+        assert(v[50] == b);
+        v.flip(50);
+        assert(v[50] != b);
+        v.flip(50);
+        assert(v[50] == b);
+    }
+    catch (std::out_of_range&)
+    {
+    }
+}
+
+int main()
+{
+    test_flip_one<0>();
+    test_flip_one<1>();
+    test_flip_one<31>();
+    test_flip_one<32>();
+    test_flip_one<33>();
+    test_flip_one<63>();
+    test_flip_one<64>();
+    test_flip_one<65>();
+    test_flip_one<1000>();
+}