clang/test/Sema/tentative-decls.c

   1 // RUN: %clang_cc1 %s -fsyntax-only -Wprivate-extern -verify
   2
   3 // PR3310
   4 struct a x1; // expected-note 2{{forward declaration of 'struct a'}}
   5 static struct a x2; // expected-warning{{tentative definition of variable with internal linkage has incomplete non-array type 'struct a'}}
   6 struct a x3[10]; // expected-error{{array has incomplete element type 'struct a'}}
   7 struct a {int x;};
   8 static struct a x2_okay;
   9 struct a x3_okay[10];
  10 struct b x4; // expected-error{{tentative definition has type 'struct b' that is never completed}} \
  11             // expected-note{{forward declaration of 'struct b'}}
  12
  13 const int a [1] = {1};
  14 extern const int a[];
  15
  16 extern const int b[];
  17 const int b [1] = {1};
  18
  19 extern const int c[] = {1}; // expected-warning{{'extern' variable has an initializer}}
  20 const int c[];
  21
  22 int i1 = 1; // expected-note {{previous definition is here}}
  23 int i1 = 2; // expected-error {{redefinition of 'i1'}}
  24 int i1;
  25 int i1;
  26 extern int i5; // expected-note {{previous declaration is here}}
  27 static int i5; // expected-error{{static declaration of 'i5' follows non-static declaration}}
  28
  29 static int i2 = 5; // expected-note 1 {{previous definition is here}}
  30 int i2 = 3; // expected-error{{non-static declaration of 'i2' follows static declaration}}
  31
  32 static int i3 = 5;
  33 extern int i3;
  34
  35 // rdar://7703982
  36 __private_extern__ int pExtern; // expected-warning {{use of __private_extern__ on a declaration may not produce external symbol private to the linkage unit and is deprecated}} \
  37 // expected-note {{use __attribute__((visibility("hidden"))) attribute instead}}
  38 int pExtern = 0;
  39
  40 int i4;
  41 int i4;
  42 extern int i4;
  43
  44 int (*pToArray)[];
  45 int (*pToArray)[8];
  46
  47 int redef[10];
  48 int redef[];  // expected-note {{previous definition is here}}
  49 int redef[11]; // expected-error{{redefinition of 'redef'}}
  50
  51 void func(void) {
  52   extern int i6; // expected-note {{previous declaration is here}}
  53   static int i6; // expected-error{{static declaration of 'i6' follows non-static declaration}}
  54 }
  55
  56 void func2(void)
  57 {
  58   extern double *p;
  59   extern double *p;
  60 }
  61
  62 // <rdar://problem/6808352>
  63 static int a0[];
  64 static int b0;
  65
  66 static int a0[] = { 4 };
  67 static int b0 = 5;