1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 
3 int outer1; // expected-note{{previous definition is here}}
4 extern int outer2; // expected-note{{previous declaration is here}}
5 int outer4;
6 int outer4; // expected-note{{previous definition is here}}
7 int outer5;
8 int outer6(float); // expected-note{{previous definition is here}}
9 int outer7(float);
10 
outer_test()11 void outer_test() {
12   extern float outer1; // expected-error{{redeclaration of 'outer1' with a different type}}
13   extern float outer2; // expected-error{{redeclaration of 'outer2' with a different type}}
14   extern float outer3; // expected-note{{previous declaration is here}}
15   double outer4;
16   extern int outer5; // expected-note{{previous declaration is here}}
17   extern int outer6; // expected-error{{redefinition of 'outer6' as different kind of symbol}}
18   int outer7;
19   extern int outer8; // expected-note{{previous definition is here}}
20   extern int outer9;
21   {
22     extern int outer9; // expected-note{{previous declaration is here}}
23   }
24 }
25 
26 int outer3; // expected-error{{redefinition of 'outer3' with a different type}}
27 float outer4; // expected-error{{redefinition of 'outer4' with a different type}}
28 float outer5;  // expected-error{{redefinition of 'outer5' with a different type}}
29 int outer8(int); // expected-error{{redefinition of 'outer8' as different kind of symbol}}
30 float outer9; // expected-error{{redefinition of 'outer9' with a different type}}
31 
32 extern int outer13; // expected-note{{previous declaration is here}}
outer_shadowing_test()33 void outer_shadowing_test() {
34   extern int outer10;
35   extern int outer11; // expected-note{{previous declaration is here}}
36   extern int outer12; // expected-note{{previous declaration is here}}
37   {
38     float outer10;
39     float outer11;
40     float outer12;
41     {
42       extern int outer10; // okay
43       extern float outer11; // expected-error{{redeclaration of 'outer11' with a different type}}
44       static double outer12;
45       {
46         extern float outer12; // expected-error{{redeclaration of 'outer12' with a different type}}
47         extern float outer13; // expected-error{{redeclaration of 'outer13' with a different type}}
48       }
49     }
50   }
51 }
52 
g18(void)53 void g18(void) { // expected-note{{'g18' declared here}}
54   extern int g19;
55 }
56 int *p=&g19; // expected-error{{use of undeclared identifier 'g19'}} \
57              // expected-warning{{incompatible pointer types}}
58 
59 // PR3645
60 static int a;
61 extern int a; // expected-note {{previous declaration is here}}
62 int a;	// expected-error {{non-static declaration of 'a' follows static declaration}}
63 
f(int x)64 void f(int x) { // expected-note {{previous definition is here}}
65   extern int x; // expected-error {{extern declaration of 'x' follows non-extern declaration}}
66 }
67 
68 extern int b[];
g20()69 void g20() { extern int b[3]; } // expected-note{{previous declaration is here}}
g21()70 void g21() { extern int b[4]; } // expected-error{{redeclaration of 'b' with a different type: 'int [4]' vs 'int [3]'}}
71