1 files changed, 25 insertions, 0 deletions
diff --git a/libcxx/test/std/input.output/iostreams.base/ios/iostate.flags/bool.pass.cpp b/libcxx/test/std/input.output/iostreams.base/ios/iostate.flags/bool.pass.cpp
new file mode 100644
index 00000000000..0de889e549c
--- /dev/null
+++ b/libcxx/test/std/input.output/iostreams.base/ios/iostate.flags/bool.pass.cpp
@@ -0,0 +1,25 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <ios>
+
+// template <class charT, class traits> class basic_ios
+
+// operator unspecified-bool-type() const;
+
+#include <ios>
+#include <cassert>
+
+int main()
+{
+    std::ios ios(0);
+    assert(static_cast<bool>(ios) == !ios.fail());
+    ios.setstate(std::ios::failbit);
+    assert(static_cast<bool>(ios) == !ios.fail());
+}