1 files changed, 40 insertions, 0 deletions
diff --git a/libcxx/test/diagnostics/syserr/syserr.errcat/syserr.errcat.nonvirtuals/default_ctor.pass.cpp b/libcxx/test/diagnostics/syserr/syserr.errcat/syserr.errcat.nonvirtuals/default_ctor.pass.cpp
new file mode 100644
index 00000000000..0573ef862ef
--- /dev/null
+++ b/libcxx/test/diagnostics/syserr/syserr.errcat/syserr.errcat.nonvirtuals/default_ctor.pass.cpp
@@ -0,0 +1,40 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <system_error>
+
+// class error_category
+
+// constexpr error_category() noexcept;
+
+#include <system_error>
+#include <type_traits>
+#include <string>
+#include <cassert>
+
+#if _LIBCPP_STD_VER > 11
+
+class test1
+    : public std::error_category
+{
+public:
+    constexpr test1() = default;  // won't compile if error_category() is not constexpr
+    virtual const char* name() const noexcept {return nullptr;}
+    virtual std::string message(int ev) const {return std::string();}
+};
+
+#endif  // _LIBCPP_STD_VER > 11
+
+int main()
+{
+#if _LIBCPP_STD_VER > 11
+    static_assert(std::is_nothrow_default_constructible<test1>::value,
+                                 "error_category() must exist and be noexcept");
+#endif  // _LIBCPP_STD_VER > 11
+}