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