1 // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++11
2 
3 enum E2 { };
4 
5 struct A {
6   operator E2&(); // expected-note 3 {{candidate function}}
7 };
8 
9 struct B {
10   operator E2&(); // expected-note 3 {{candidate function}}
11 };
12 
13 struct C : B, A {
14 };
15 
16 void test(C c) {
17   const E2 &e2 = c; // expected-error {{reference initialization of type 'const E2 &' with initializer of type 'C' is ambiguous}}
18 }
19 
20 void foo(const E2 &);// expected-note{{passing argument to parameter here}}
21 
22 const E2 & re(C c) {
23     foo(c); // expected-error {{reference initialization of type 'const E2 &' with initializer of type 'C' is ambiguous}}
24 
25     return c; // expected-error {{reference initialization of type 'const E2 &' with initializer of type 'C' is ambiguous}}
26 }
27 
28 namespace CWG2352 {
29   void f(const int * const &) = delete;
30   void f(int *);
31 
32   void g(int * &);
33   void g(const int *) = delete;
34 
35   void h1(int *const * const &);
36   void h1(const int *const *) = delete;
37   void h2(const int *const * const &) = delete;
38   void h2(int *const *);
39 
40   void test() {
41     int *x;
42     // Under CWG2352, this became ambiguous. We order by qualification
43     // conversion even when comparing a reference binding to a
44     // non-reference-binding.
45     f(x);
46     g(x);
47     h1(&x);
48     h2(&x);
49   }
50 }
51