1 files changed, 27 insertions, 0 deletions
diff --git a/test/SemaCXX/cxx2a-user-defined-literals.cpp b/test/SemaCXX/cxx2a-user-defined-literals.cpp
new file mode 100644
index 0000000000000..d730eba741a88
--- /dev/null
+++ b/test/SemaCXX/cxx2a-user-defined-literals.cpp
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -std=c++2a %s -include %s -verify
+
+#ifndef INCLUDED
+#define INCLUDED
+
+#pragma clang system_header
+namespace std {
+  namespace chrono {
+    struct day{};
+    struct year{};
+  }
+  constexpr chrono::day operator"" d(unsigned long long d) noexcept;
+  constexpr chrono::year operator"" y(unsigned long long y) noexcept;
+}
+
+#else
+
+using namespace std;
+chrono::day dec_d = 5d;
+chrono::day oct_d = 05d;
+chrono::day bin_d = 0b011d;
+// expected-error@+3{{no viable conversion from 'int' to 'chrono::day'}}
+// expected-note@9{{candidate constructor (the implicit copy constructor)}}
+// expected-note@9{{candidate constructor (the implicit move constructor)}}
+chrono::day hex_d = 0x44d;
+chrono::year y  = 10y;
+#endif