Add missing testcase from r224388.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224401 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CXX/drs/dr16xx.cpp b/test/CXX/drs/dr16xx.cpp
new file mode 100644 (file)
index 0000000..62040f1
--- /dev/null
+++ b/test/CXX/drs/dr16xx.cpp
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++1z -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
+
+#if __cplusplus < 201103L
+// expected-no-diagnostics
+#endif
+
+namespace dr1684 { // dr1684: 3.6
+#if __cplusplus >= 201103L
+  struct NonLiteral { // expected-note {{because}}
+    NonLiteral();
+    constexpr int f() { return 0; } // expected-warning 0-1{{will not be implicitly 'const'}}
+  };
+  constexpr int f(NonLiteral &) { return 0; }
+  constexpr int f(NonLiteral) { return 0; } // expected-error {{not a literal type}}
+#endif
+}