1// RUN: %clang_cc1 -std=c++11 -verify %s
2
3typedef int (*fp)(int);
4int surrogate(int);
5
6struct X {
7  X() = default;  // expected-note{{candidate constructor not viable: requires 0 arguments, but 1 was provided}}
8  X(const X&) = default;  // expected-note{{candidate constructor not viable: no known conversion from 'bool' to 'const X' for 1st argument}}
9  X(bool b) __attribute__((enable_if(b, "chosen when 'b' is true")));  // expected-note{{candidate disabled: chosen when 'b' is true}}
10
11  void f(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero")));
12  void f(int n) __attribute__((enable_if(n == 1, "chosen when 'n' is one")));  // expected-note{{member declaration nearly matches}} expected-note{{candidate disabled: chosen when 'n' is one}}
13
14  static void s(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero")));  // expected-note2{{candidate disabled: chosen when 'n' is zero}}
15
16  void conflict(int n) __attribute__((enable_if(n+n == 10, "chosen when 'n' is five")));  // expected-note{{candidate function}}
17  void conflict(int n) __attribute__((enable_if(n*2 == 10, "chosen when 'n' is five")));  // expected-note{{candidate function}}
18
19  operator long() __attribute__((enable_if(true, "chosen on your platform")));
20  operator int() __attribute__((enable_if(false, "chosen on other platform")));
21
22  operator fp() __attribute__((enable_if(false, "never enabled"))) { return surrogate; }  // expected-note{{conversion candidate of type 'int (*)(int)'}}  // FIXME: the message is not displayed
23};
24
25void X::f(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero")))  // expected-note{{member declaration nearly matches}} expected-note{{candidate disabled: chosen when 'n' is zero}}
26{
27}
28
29void X::f(int n) __attribute__((enable_if(n == 2, "chosen when 'n' is two")))  // expected-error{{out-of-line definition of 'f' does not match any declaration in 'X'}} expected-note{{candidate disabled: chosen when 'n' is two}}
30{
31}
32
33X x1(true);
34X x2(false); // expected-error{{no matching constructor for initialization of 'X'}}
35
36__attribute__((deprecated)) constexpr int old() { return 0; }  // expected-note2{{'old' has been explicitly marked deprecated here}}
37void deprec1(int i) __attribute__((enable_if(old() == 0, "chosen when old() is zero")));  // expected-warning{{'old' is deprecated}}
38void deprec2(int i) __attribute__((enable_if(old() == 0, "chosen when old() is zero")));  // expected-warning{{'old' is deprecated}}
39
40void overloaded(int);
41void overloaded(long);
42
43struct Nothing { };
44template<typename T> void typedep(T t) __attribute__((enable_if(t, "")));  // expected-note{{candidate disabled:}}  expected-error{{value of type 'Nothing' is not contextually convertible to 'bool'}}
45template<int N> void valuedep() __attribute__((enable_if(N == 1, "")));
46
47// FIXME: we skip potential constant expression evaluation on value dependent
48// enable-if expressions
49int not_constexpr();
50template<int N> void valuedep() __attribute__((enable_if(N == not_constexpr(), "")));
51
52template <typename T> void instantiationdep() __attribute__((enable_if(sizeof(sizeof(T)) != 0, "")));
53
54void test() {
55  X x;
56  x.f(0);
57  x.f(1);
58  x.f(2);  // no error, suppressed by erroneous out-of-line definition
59  x.f(3);  // expected-error{{no matching member function for call to 'f'}}
60
61  x.s(0);
62  x.s(1);  // expected-error{{no matching member function for call to 's'}}
63
64  X::s(0);
65  X::s(1);  // expected-error{{no matching member function for call to 's'}}
66
67  x.conflict(5);  // expected-error{{call to member function 'conflict' is ambiguous}}
68
69  deprec2(0);
70
71  overloaded(x);
72
73  int i = x(1);  // expected-error{{no matching function for call to object of type 'X'}}
74
75  Nothing n;
76  typedep(0);  // expected-error{{no matching function for call to 'typedep'}}
77  typedep(1);
78  typedep(n);  // expected-note{{in instantiation of function template specialization 'typedep<Nothing>' requested here}}
79}
80