gcc/testsuite/gcc.dg/cast-qual-1.c

   1 /* Incorrect `cast discards `const'' warnings.  There should be warnings
   2    in bad_cast and bad_assign; bad_assign gets the correct warning, but
   3    good_cast may get the warning instead of bad_cast.
   4    gcc 2.7.2.3 passes, egcs-1.1.2 and egcs-ss-19990428 fail.
   5    http://gcc.gnu.org/ml/gcc-bugs/1998-08/msg00645.html */
   6 /* { dg-do compile } */
   7 /* { dg-options "-Wcast-qual" } */
   8 void
   9 good_cast(const void *bar)
  10 {
  11   (char *const *)bar; /* { dg-bogus "cast discards" "discarding `const' warning" } */
  12 }
  13
  14 void
  15 bad_cast(const void *bar)
  16 {
  17   (const char **)bar; /* { dg-warning "cast discards" "discarding `const' warning" } */
  18 }
  19
  20 void
  21 good_assign(const void *bar)
  22 {
  23   char *const *foo = bar; /* { dg-bogus "initialization discards" "discarding `const' warning" } */
  24 }
  25
  26 void
  27 bad_assign(const void *bar)
  28 {
  29   const char **foo = bar; /* { dg-warning "initialization discards" "discarding `const' warning" } */
  30 }