1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 struct X {
3   X();
4   X(int);
5 };
6 
7 X operator+(X, X);
8 X operator-(X, X) { X x; return x; }
9 
10 struct Y {
11   Y operator-() const;
12   void operator()(int x = 17) const;
13   int operator[](int);
14 
15   static int operator+(Y, Y); // expected-error{{overloaded 'operator+' cannot be a static member function}}
16 };
17 
18 
19 void f(X x) {
20   x = operator+(x, x);
21 }
22 
23 X operator+(int, float); // expected-error{{overloaded 'operator+' must have at least one parameter of class or enumeration type}}
24 
25 X operator*(X, X = 5); // expected-error{{parameter of overloaded 'operator*' cannot have a default argument}}
26 
27 X operator/(X, X, ...); // expected-error{{overloaded 'operator/' cannot be variadic}}
28 
29 X operator%(Y); // expected-error{{overloaded 'operator%' must be a binary operator (has 1 parameter)}}
30 
31 void operator()(Y&, int, int); // expected-error{{overloaded 'operator()' must be a non-static member function}}
32 
33 typedef int INT;
34 typedef float FLOAT;
35 Y& operator++(Y&);
36 Y operator++(Y&, INT);
37 X operator++(X&, FLOAT); // expected-error{{parameter of overloaded post-increment operator must have type 'int' (not 'FLOAT' (aka 'float'))}}
38 
39 int operator+; // expected-error{{'operator+' cannot be the name of a variable or data member}}
40 
41 namespace PR6238 {
42   static struct {
43     void operator()();
44   } plus;
45 }
46 
47 struct PR10839 {
48   operator int; // expected-error{{'operator int' cannot be the name of a variable or data member}}
49   int operator+; // expected-error{{'operator+' cannot be the name of a variable or data member}}
50 };
51 
52 namespace PR14120 {
53   struct A {
54     static void operator()(int& i) { ++i; } // expected-error{{overloaded 'operator()' cannot be a static member function}}
55   };
56   void f() {
57     int i = 0;
58     A()(i);
59   }
60 }
61