1 files changed, 52 insertions, 0 deletions
diff --git a/test/SemaCXX/ambig-user-defined-conversions.cpp b/test/SemaCXX/ambig-user-defined-conversions.cpp
new file mode 100644
index 0000000000000..94598f0e8ef2f
--- /dev/null
+++ b/test/SemaCXX/ambig-user-defined-conversions.cpp
@@ -0,0 +1,52 @@
+// RUN: clang-cc -fsyntax-only -verify %s
+
+// Test1
+struct BASE { 
+  operator int &(); // expected-note {{candidate function}}
+}; 
+struct BASE1 { 
+  operator int &(); // expected-note {{candidate function}}
+}; 
+
+struct B : public BASE, BASE1 { 
+
+}; 
+
+extern B f(); 
+
+B b1;
+void func(const int ci, const char cc); // expected-note {{candidate function}}
+void func(const char ci, const B b); // expected-note {{candidate function}}
+void func(const B b, const int ci); // expected-note {{candidate function}}
+
+const int Test1() {
+  func(b1, f()); // expected-error {{call to 'func' is ambiguous}}
+  return f(); // expected-error {{conversion from 'struct B' to 'int const' is ambiguous}}
+}
+
+
+// Test2
+struct E;
+struct A { 
+  A (E&); 
+};
+
+struct E { 
+  operator A (); 
+};
+
+struct C { 
+  C (E&);  
+};
+
+void f1(A);	// expected-note {{candidate function}}
+void f1(C);	// expected-note {{candidate function}}
+
+void Test2()
+{
+	E b;
+	f1(b);  // expected-error {{call to 'f1' is ambiguous}}	
+                // ambiguous because b -> C via constructor and
+                // b → A via constructor or conversion function.
+}
+