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1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 
3 namespace test0 {
4   struct BASE {
5     operator int &(); // expected-note {{candidate function}}
6   };
7   struct BASE1 {
8     operator int &(); // expected-note {{candidate function}}
9   };
10 
11   struct B : public BASE, BASE1 {};
12 
13   extern B f();
14   B b1;
15 
16   void func(const int ci, const char cc); // expected-note {{candidate function}}
17   void func(const char ci, const B b); // expected-note {{candidate function}}
18   void func(const B b, const int ci); // expected-note {{candidate function}}
19 
Test1()20   const int Test1() {
21 
22     func(b1, f()); // expected-error {{call to 'func' is ambiguous}}
23     return f(); // expected-error {{conversion from 'test0::B' to 'const int' is ambiguous}}
24   }
25 
26   // This used to crash when comparing the two operands.
27   void func2(const char cc); // expected-note {{candidate function}}
28   void func2(const int ci); // expected-note {{candidate function}}
Test2()29   void Test2() {
30     func2(b1); // expected-error {{call to 'func2' is ambiguous}}
31   }
32 }
33 
34 namespace test1 {
35   struct E;
36   struct A {
37     A (E&);
38   };
39 
40   struct E {
41     operator A ();
42   };
43 
44   struct C {
45     C (E&);
46   };
47 
48   void f1(A);	// expected-note {{candidate function}}
49   void f1(C);	// expected-note {{candidate function}}
50 
Test2()51   void Test2()
52   {
53     E b;
54     f1(b);  // expected-error {{call to 'f1' is ambiguous}}
55             // ambiguous because b -> C via constructor and
56             // b -> A via constructor or conversion function.
57   }
58 }
59 
60 namespace rdar8876150 {
61   struct A { operator bool(); };
62   struct B : A { };
63   struct C : A { };
64   struct D : B, C { };
65 
f(D d)66   bool f(D d) { return !d; } // expected-error{{ambiguous conversion from derived class 'rdar8876150::D' to base class 'rdar8876150::A':}}
67 }
68