1// RUN: %clang_cc1 -fsyntax-only -verify %s
2// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
3// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
4
5struct ConvToBool {
6  operator bool() const;
7};
8
9struct ConvToInt {
10  operator int();
11};
12
13struct ExplicitConvToBool {
14  explicit operator bool();
15#if __cplusplus <= 199711L // C++03 or earlier modes
16  // expected-warning@-2{{explicit conversion functions are a C++11 extension}}
17#endif
18};
19
20void test_conv_to_bool(ConvToBool ctb, ConvToInt cti, ExplicitConvToBool ecb) {
21  if (ctb) { }
22  if (cti) { }
23  if (ecb) { }
24  for (; ctb; ) { }
25  for (; cti; ) { }
26  for (; ecb; ) { }
27  while (ctb) { };
28  while (cti) { }
29  while (ecb) { }
30  do { } while (ctb);
31  do { } while (cti);
32  do { } while (ecb);
33
34  if (!ctb) { }
35  if (!cti) { }
36  if (!ecb) { }
37
38  bool b1 = !ecb;
39  if (ctb && ecb) { }
40  bool b2 = ctb && ecb;
41  if (ctb || ecb) { }
42  bool b3 = ctb || ecb;
43}
44
45void accepts_bool(bool) { } // expected-note{{candidate function}}
46
47struct ExplicitConvToRef {
48  explicit operator int&();
49#if (__cplusplus <= 199711L) // C++03 or earlier modes
50  // expected-warning@-2{{explicit conversion functions are a C++11 extension}}
51#endif
52};
53
54void test_explicit_bool(ExplicitConvToBool ecb) {
55  bool b1(ecb); // okay
56  bool b2 = ecb; // expected-error{{no viable conversion from 'ExplicitConvToBool' to 'bool'}}
57  accepts_bool(ecb); // expected-error{{no matching function for call to}}
58}
59
60void test_explicit_conv_to_ref(ExplicitConvToRef ecr) {
61  int& i1 = ecr; // expected-error{{non-const lvalue reference to type 'int' cannot bind to a value of unrelated type 'ExplicitConvToRef'}}
62  int& i2(ecr); // okay
63}
64
65struct A { };
66struct B { };
67struct C {
68  explicit operator A&();
69#if __cplusplus <= 199711L // C++03 or earlier modes
70// expected-warning@-2{{explicit conversion functions are a C++11 extension}}
71#endif
72  operator B&(); // expected-note{{candidate}}
73};
74
75void test_copy_init_conversions(C c) {
76  A &a = c; // expected-error{{no viable conversion from 'C' to 'A'}}
77  B &b = c; // okay
78}
79