gcc/testsuite/gcc.dg/c23-empty-init-2.c

   1 /* Test C23 support for empty initializers: invalid use cases.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c23 -pedantic-errors" } */
   4
   5 /* Empty initialization is invalid for arrays of unknown size.  This is
   6    diagnosed via the diagnostic for zero-size arrays.  */
   7 int x[] = {}; /* { dg-error "zero or negative size array" } */
   8
   9 void
  10 f (int a)
  11 {
  12   int x1[] = {}; /* { dg-error "zero or negative size array" } */
  13   int x2[][a] = {}; /* { dg-error "zero or negative size array" } */
  14   /* Nonempty VLA initializers are still invalid.  */
  15   int x3[a] = { 0 }; /* { dg-error "variable-sized object may not be initialized except with an empty initializer" } */
  16   /* Variable-size compound literals are still invalid.  */
  17   (void) (int [a]) {}; /* { dg-error "compound literal has variable size" } */
  18 }