gcc/testsuite/c-c++-common/Wcast-function-type.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wcast-function-type" } */
   3
   4 int f(long);
   5
   6 typedef int (f1)(long);
   7 typedef int (f2)(void*);
   8 #ifdef __cplusplus
   9 typedef int (f3)(...);
  10 typedef void (f4)(...);
  11 #else
  12 typedef int (f3)();
  13 typedef void (f4)();
  14 #endif
  15 typedef void (f5)(void);
  16
  17 f1 *a;
  18 f2 *b;
  19 f3 *c;
  20 f4 *d;
  21 f5 *e;
  22
  23 void
  24 foo (void)
  25 {
  26   a = (f1 *) f; /* { dg-bogus   "incompatible function types" } */
  27   b = (f2 *) f; /* { dg-warning "incompatible function types" } */
  28   c = (f3 *) f; /* { dg-bogus   "incompatible function types" } */
  29   d = (f4 *) f; /* { dg-warning "incompatible function types" } */
  30   e = (f5 *) f; /* { dg-bogus   "incompatible function types" } */
  31 }