clang/test/Sema/incomplete-decl.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify=c,expected %s
   2 // RUN: %clang_cc1 -x c++ -fsyntax-only -verify=cxx,expected %s
   3
   4
   5
   6 struct foo; // c-note 5 {{forward declaration of 'struct foo'}} \
   7                cxx-note 3 {{forward declaration of 'foo'}}
   8
   9 void b;  // expected-error {{variable has incomplete type 'void'}}
  10 struct foo f; // c-error {{tentative definition has type 'struct foo' that is never completed}} \
  11                  cxx-error {{variable has incomplete type 'struct foo'}}
  12
  13 static void c; // expected-error {{variable has incomplete type 'void'}}
  14 static struct foo g;  // c-warning {{tentative definition of variable with internal linkage has incomplete non-array type 'struct foo'}} \
  15                          c-error {{tentative definition has type 'struct foo' that is never completed}} \
  16                          cxx-error {{variable has incomplete type 'struct foo'}}
  17
  18 extern void d; // cxx-error {{variable has incomplete type 'void'}}
  19 extern struct foo e;
  20
  21 int ary[]; // c-warning {{tentative array definition assumed to have one element}} \
  22               cxx-error {{definition of variable with array type needs an explicit size or an initializer}}
  23 struct foo bary[]; // c-error {{array has incomplete element type 'struct foo'}} \
  24                       cxx-error {{definition of variable with array type needs an explicit size or an initializer}}
  25
  26 void func(void) {
  27   int ary[]; // expected-error {{definition of variable with array type needs an explicit size or an initializer}}
  28   void b; // expected-error {{variable has incomplete type 'void'}}
  29   struct foo f; // expected-error {{variable has incomplete type 'struct foo'}}
  30 }
  31
  32 int h[]; // c-warning {{tentative array definition assumed to have one element}} \
  33             cxx-error {{definition of variable with array type needs an explicit size or an initializer}}
  34 int (*i)[] = &h+1; // c-error {{arithmetic on a pointer to an incomplete type 'int[]'}}
  35
  36 struct bar j = {1}; // expected-error {{variable has incomplete type 'struct bar'}} \
  37                        c-note {{forward declaration of 'struct bar'}} \
  38                        cxx-note 2 {{forward declaration of 'bar'}}
  39
  40 struct bar k; // cxx-error {{variable has incomplete type 'struct bar'}}
  41 struct bar { int a; };
  42
  43 struct x y; //c-note 2 {{forward declaration of 'struct x'}} \
  44               cxx-error {{variable has incomplete type 'struct x'}} \
  45               cxx-note {{forward declaration of 'x'}}
  46 void foo() {
  47   (void)(1 ? y : y); // c-error 2 {{incomplete type 'struct x' where a complete type is required}}
  48 }
  49 struct x{
  50   int a;
  51 };