1 files changed, 34 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/ambiguous-builtin-unary-operator.cpp b/clang/test/SemaCXX/ambiguous-builtin-unary-operator.cpp
new file mode 100644
index 0000000..6e96e03
--- /dev/null
+++ b/clang/test/SemaCXX/ambiguous-builtin-unary-operator.cpp
@@ -0,0 +1,34 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++11
+
+struct A {
+  operator int&();
+  operator long*& ();
+};
+
+struct B {
+  operator long&();
+  operator int*& ();
+};
+
+struct C : B, A { };
+
+void test(C c) {
+  ++c; // expected-error {{use of overloaded operator '++' is ambiguous}}\
+       // expected-note {{built-in candidate operator++(int &)}} \
+       // expected-note {{built-in candidate operator++(long &)}} \
+       // expected-note {{built-in candidate operator++(long *&)}} \
+       // expected-note {{built-in candidate operator++(int *&)}}
+}
+
+struct A1 { operator volatile int&(); };
+
+struct B1 { operator volatile long&(); };
+
+struct C1 : B1, A1 { };
+
+void test(C1 c) {
+  ++c;	// expected-error {{use of overloaded operator '++' is ambiguous}} \
+	// expected-note {{built-in candidate operator++(volatile int &)}} \
+	// expected-note {{built-in candidate operator++(volatile long &)}}
+}
+