1 // RUN: %clang_cc1 -Wno-int-to-pointer-cast -fsyntax-only -verify -pedantic-errors %s
2 // RUN: %clang_cc1 -Wno-int-to-pointer-cast -fsyntax-only -verify -pedantic-errors -std=gnu++98 %s
3 // RUN: %clang_cc1 -Wno-int-to-pointer-cast -fsyntax-only -verify -pedantic-errors -std=gnu++11 %s
4 // RUN: %clang_cc1 -Wno-int-to-pointer-cast -fsyntax-only -verify -pedantic-errors -x objective-c++ %s
5 
6 void f() {
7   int a;
8   struct S { int m; };
9   typedef S *T;
10 
11   // Expressions.
12   T(a)->m = 7;
13   int(a)++; // expected-error {{assignment to cast is illegal}}
14   __extension__ int(a)++; // expected-error {{assignment to cast is illegal}}
15   __typeof(int)(a,5)<<a; // expected-error {{excess elements in scalar initializer}} expected-warning {{expression result unused}}
16   void(a), ++a;
17   if (int(a)+1) {}
18   for (int(a)+1;;) {} // expected-warning {{expression result unused}}
19   a = sizeof(int()+1);
20   a = sizeof(int(1));
21   typeof(int()+1) a2; // expected-error {{extension used}}
22   (int(1)); // expected-warning {{expression result unused}}
23 
24   // type-id
25   (int())1; // expected-error {{C-style cast from 'int' to 'int ()' is not allowed}}
26 
27   // Declarations.
28   int fd(T(a)); // expected-warning {{disambiguated as a function declaration}} expected-note{{add a pair of parentheses}}
29   T(*d)(int(p)); // expected-note {{previous}}
30   typedef T td(int(p));
31   extern T tp(int(p));
32   T d3(); // expected-warning {{empty parentheses interpreted as a function declaration}} expected-note {{replace parentheses with an initializer}}
33   T d3v(void);
34   typedef T d3t();
35   extern T f3();
36   __typeof(*T()) f4(); // expected-warning {{empty parentheses interpreted as a function declaration}} expected-note {{replace parentheses with an initializer}}
37   typedef void *V;
38   __typeof(*V()) f5(); // expected-error {{ISO C++ does not allow indirection on operand of type 'V' (aka 'void *')}}
39   T multi1,
40     multi2(); // expected-warning {{empty parentheses interpreted as a function declaration}} expected-note {{replace parentheses with an initializer}}
41   T(d)[5]; // expected-error {{redefinition of 'd'}}
42   typeof(int[])(f) = { 1, 2 }; // expected-error {{extension used}}
43   void(b)(int);
44   int(d2) __attribute__(());
45   if (int(a)=1) {}
46   int(d3(int()));
47 }
48 
49 struct RAII {
50   RAII();
51   RAII(int);
52   ~RAII();
53 };
54 
55 struct NotRAII {
56   NotRAII();
57   NotRAII(int);
58 };
59 
60 void func();
61 void func2(short);
62 namespace N {
63   struct S;
64   int n;
65 
66   void emptyParens() {
67     RAII raii(); // expected-warning {{function declaration}} expected-note {{remove parentheses to declare a variable}}
68     int a, b, c, d, e, // expected-note {{change this ',' to a ';' to call 'func'}}
69     func(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
70 
71     S s(); // expected-warning {{function declaration}}
72 #if __cplusplus >= 201103L
73     // expected-note@-2 {{replace parentheses with an initializer to declare a variable}}
74 #endif
75   }
76   void nonEmptyParens() {
77     int f = 0, // g = 0; expected-note {{change this ',' to a ';' to call 'func2'}}
78     func2(short(f)); // expected-warning {{function declaration}} expected-note {{add a pair of parentheses}}
79 
80     RAII(n); // expected-warning {{parentheses were disambiguated as redundant parentheses around declaration of variable named 'n'}}
81     // expected-note@-1 {{add a variable name to declare a 'RAII' initialized with 'n'}}
82     // expected-note@-2 {{add enclosing parentheses to perform a function-style cast}}
83     // expected-note@-3 {{remove parentheses to silence this warning}}
84 
85     RAII(undeclared1);
86 #pragma clang diagnostic push
87 #pragma clang diagnostic warning "-Wredundant-parens"
88     RAII(undeclared2); // expected-warning {{redundant parentheses surrounding declarator}}
89 #pragma clang diagnostic pop
90 
91     {
92       NotRAII(n); // expected-warning {{parentheses were disambiguated as redundant parentheses around declaration of variable named 'n'}}
93       // expected-note@-1 {{add enclosing parentheses to perform a function-style cast}}
94       // expected-note@-2 {{remove parentheses to silence this warning}}
95     }
96   }
97 }
98 
99 class C { };
100 void fn(int(C)) { } // void fn(int(*fp)(C c)) { } expected-note{{candidate function}}
101                     // not: void fn(int C);
102 int g(C);
103 
104 void foo() {
105   fn(1); // expected-error {{no matching function}}
106   fn(g); // OK
107 }
108 
109 namespace PR11874 {
110 void foo(); // expected-note 3 {{class 'foo' is hidden by a non-type declaration of 'foo' here}}
111 class foo {};
112 class bar {
113   bar() {
114     const foo* f1 = 0; // expected-error {{must use 'class' tag to refer to type 'foo' in this scope}}
115     foo* f2 = 0; // expected-error {{must use 'class' tag to refer to type 'foo' in this scope}}
116     foo f3; // expected-error {{must use 'class' tag to refer to type 'foo' in this scope}}
117   }
118 };
119 
120 int baz; // expected-note 2 {{class 'baz' is hidden by a non-type declaration of 'baz' here}}
121 class baz {};
122 void fizbin() {
123   const baz* b1 = 0; // expected-error {{must use 'class' tag to refer to type 'baz' in this scope}}
124   baz* b2; // expected-error {{use of undeclared identifier 'b2'}}
125   baz b3; // expected-error {{must use 'class' tag to refer to type 'baz' in this scope}}
126 }
127 }
128 
129 namespace TemporaryFromFunctionCall {
130   struct A {
131     A(int);
132   };
133   int f();
134   int g(int);
135   namespace N {
136     void x() {
137       // FIXME: For the first and second of these (but not the third), we
138       // should produce a vexing-parse warning.
139       A(f());
140       A(g(int()));
141       A(g(int));
142     }
143   }
144 }
145