clang/test/Sema/var-redecl.c

   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
  11 void outer_test(void) {
  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}}
  33 void outer_shadowing_test(void) {
  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
  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
  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[];
  69 void g20(void) { extern int b[3]; } // expected-note{{previous declaration is here}}
  70 void g21(void) { extern int b[4]; } // expected-error{{redeclaration of 'b' with a different type: 'int[4]' vs 'int[3]'}}