1 files changed, 49 insertions, 0 deletions
diff --git a/test/std/utilities/template.bitset/bitset.members/index_const.pass.cpp b/test/std/utilities/template.bitset/bitset.members/index_const.pass.cpp
new file mode 100644
index 000000000000..e3c28c693576
--- /dev/null
+++ b/test/std/utilities/template.bitset/bitset.members/index_const.pass.cpp
@@ -0,0 +1,49 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 constexpr bool operator[](size_t pos) const;
+
+#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_index_const()
+{
+    const std::bitset<N> v1 = make_bitset<N>();
+    if (N > 0)
+    {
+        assert(v1[N/2] == v1.test(N/2));
+    }
+}
+
+int main()
+{
+    test_index_const<0>();
+    test_index_const<1>();
+    test_index_const<31>();
+    test_index_const<32>();
+    test_index_const<33>();
+    test_index_const<63>();
+    test_index_const<64>();
+    test_index_const<65>();
+    test_index_const<1000>();
+}