validation/static_assert.c

   1 _Static_assert(1, "global ok");
   2
   3 struct foo {
   4         _Static_assert(1, "struct ok");
   5 };
   6
   7 void bar(void)
   8 {
   9         _Static_assert(1, " func1 ok");
  10         int i;
  11         i = 0;
  12         _Static_assert(1, " func2 ok");
  13
  14         if (1) {
  15                 _Static_assert(1, " func3 ok");
  16         }
  17 }
  18
  19 _Static_assert(0, "expected assertion failure");
  20
  21 static int f;
  22 _Static_assert(f, "non-constant expression");
  23
  24 static int *p;
  25 _Static_assert(p, "non-integer expression");
  26
  27 _Static_assert(0.1, "float expression");
  28
  29 _Static_assert(!0 == 1, "non-trivial expression");
  30
  31 static char array[4];
  32 _Static_assert(sizeof(array) == 4, "sizeof expression");
  33
  34 static const char non_literal_string[] = "non literal string";
  35 _Static_assert(0, non_literal_string);
  36
  37 _Static_assert(1 / 0, "invalid expression: should not show up?");
  38
  39 struct s {
  40         char arr[16];
  41         _Static_assert(1, "inside struct");
  42 };
  43
  44 union u {
  45         char c;
  46         int  i;
  47         _Static_assert(1, "inside union");
  48 };
  49
  50 _Static_assert(sizeof(struct s) == 16, "sizeof assertion");
  51
  52 _Static_assert(1, );
  53 _Static_assert(, "");
  54 _Static_assert(,);
  55
  56 // C2x's version: without message
  57 _Static_assert(1);
  58 _Static_assert(0);
  59
  60 /*
  61  * check-name: static assertion
  62  *
  63  * check-error-start
  64 static_assert.c:19:16: error: static assertion failed: "expected assertion failure"
  65 static_assert.c:22:16: error: bad constant expression
  66 static_assert.c:25:16: error: bad constant expression
  67 static_assert.c:27:16: error: bad constant expression
  68 static_assert.c:35:19: error: string literal expected for _Static_assert()
  69 static_assert.c:37:18: error: bad constant expression
  70 static_assert.c:52:19: error: string literal expected for _Static_assert()
  71 static_assert.c:53:16: error: Expected constant expression
  72 static_assert.c:54:16: error: Expected constant expression
  73 static_assert.c:54:17: error: string literal expected for _Static_assert()
  74 static_assert.c:58:16: error: static assertion failed
  75  * check-error-end
  76  */