gcc/testsuite/c-c++-common/array-6.c

   1 /* PR c/5597 */
   2 /* { dg-do compile } */
   3 /* { dg-options "" } */
   4
   5 /* Verify that GCC forbids non-static initialization of
   6    flexible array members. */
   7
   8 struct str { int len; char s[]; };
   9
  10 struct str a = { 2, "a" };
  11
  12 void foo()
  13 {
  14   static struct str b = { 2, "b" };
  15   struct str c = { 2, "c" }; /* { dg-error "(non-static)|(near initialization)" } */
  16   struct str d = (struct str) { 2, "d" }; /* { dg-error "(non-static)|(near initialization)" } */
  17   struct str e = (struct str) { d.len, "e" }; /* { dg-error "(non-static)|(initialization)" } */
  18 }
  19
  20 struct str f = { 0, {} };
  21
  22 void bar()
  23 {
  24   static struct str g = { 0, {} };
  25   struct str h = { 0, {} }; /* { dg-error "(non-static)|(near initialization)" } */
  26   struct str i = (struct str) { 0, {} }; /* { dg-error "(non-static)|(near initialization)" } */
  27   struct str j = (struct str) { i.len, {} }; /* { dg-error "(non-static)|(initialization)" } */
  28 }
  29
  30 struct str k = { 0 };
  31
  32 void baz()
  33 {
  34   static struct str l = { 0 };
  35   struct str m = { 0 };
  36   struct str n = (struct str) { 0 };
  37   struct str o = (struct str) { n.len };
  38 }
  39
  40 struct str p = {};
  41
  42 void qux()
  43 {
  44   static struct str q = {};
  45   struct str r = {};
  46   struct str s = (struct str) {};
  47 }