gcc/testsuite/gcc.dg/c99-bool-2.c

   1 /* Test for _Bool bit-fields.  After TC2, the width of a _Bool
   2    bit-field must not extend the width (number of sign and value bits)
   3    of _Bool, which is implementation-defined but is 1 unless the
   4    implementation defines representations for values greater than 1 in
   5    type _Bool and allows for _Bool objects to have such types, which
   6    GCC does not.  */
   7 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   8 /* { dg-do compile } */
   9 /* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
  10
  11 struct foo
  12 {
  13   _Bool b : 2; /* { dg-error "width" } */
  14 };