gcc/testsuite/gcc.dg/gnu23-attrs-1.c

   1 /* Test C23 attribute syntax.  Test GNU attributes appertain to
   2    appropriate constructs.  */
   3 /* { dg-do compile } */
   4 /* { dg-require-alias "" } */
   5 /* { dg-options "-std=gnu23" } */
   6
   7 void f (void) {};
   8
   9 [[gnu::alias("f")]] void g (void); /* { dg-error "only weak" "" { target *-*-darwin* } } */
  10
  11 void [[gnu::alias("f")]] h (void); /* { dg-warning "does not apply to types" } */
  12
  13 struct [[gnu::packed]] s { int a; char b; };
  14 _Static_assert (sizeof (struct s) == (sizeof (int) + sizeof (char)));
  15
  16 int
  17 f2 (void)
  18 {
  19   [[gnu::deprecated]] int a = 1;
  20   return a; /* { dg-warning "deprecated" } */
  21 }
  22
  23 int
  24 f3 (void)
  25 {
  26   int a [[gnu::deprecated]] = 1;
  27   return a; /* { dg-warning "deprecated" } */
  28 }
  29
  30 struct s2 { [[gnu::deprecated]] int a; int b [[gnu::deprecated]]; } x;
  31
  32 int
  33 f4 (void)
  34 {
  35   return x.a; /* { dg-warning "deprecated" } */
  36 }
  37
  38 int
  39 f5 (void)
  40 {
  41   return x.b; /* { dg-warning "deprecated" } */
  42 }
  43
  44 enum e { E1 [[gnu::deprecated]] };
  45
  46 enum e
  47 f6 (void)
  48 {
  49   return E1; /* { dg-warning "deprecated" } */
  50 }
  51
  52 int
  53 f7 ([[gnu::deprecated]] int y)
  54 {
  55   return y; /* { dg-warning "deprecated" } */
  56 }
  57
  58 union [[gnu::deprecated]] u { int x; };
  59
  60 void
  61 f8 (void)
  62 {
  63   union u var; /* { dg-warning "deprecated" } */
  64 }
  65
  66 enum [[gnu::deprecated]] edep { E2 };
  67
  68 void
  69 f9 (void)
  70 {
  71   enum edep var; /* { dg-warning "deprecated" } */
  72 }