clang/test/Sema/warn-cast-function-type.c

   1 // RUN: %clang_cc1 -x c %s -fsyntax-only -Wcast-function-type -triple x86_64-- -verify
   2
   3 int x(long);
   4
   5 typedef int (f1)(long);
   6 typedef int (f2)(void*);
   7 typedef int (f3)();
   8 typedef void (f4)();
   9 typedef void (f5)(void);
  10 typedef int (f6)(long, int);
  11 typedef int (f7)(long,...);
  12
  13 f1 *a;
  14 f2 *b;
  15 f3 *c;
  16 f4 *d;
  17 f5 *e;
  18 f6 *f;
  19 f7 *g;
  20
  21 void foo(void) {
  22   a = (f1 *)x;
  23   b = (f2 *)x; /* expected-warning {{cast from 'int (*)(long)' to 'f2 *' (aka 'int (*)(void *)') converts to incompatible function type}} */
  24   c = (f3 *)x;
  25   d = (f4 *)x; /* expected-warning {{cast from 'int (*)(long)' to 'f4 *' (aka 'void (*)()') converts to incompatible function type}} */
  26   e = (f5 *)x;
  27   f = (f6 *)x; /* expected-warning {{cast from 'int (*)(long)' to 'f6 *' (aka 'int (*)(long, int)') converts to incompatible function type}} */
  28   g = (f7 *)x;
  29 }