src/llvm/tools/clang/test/Sema/warn-bad-function-cast.c

   1 // RUN: %clang_cc1 %s -fsyntax-only -Wno-unused-value -Wbad-function-cast -triple x86_64-unknown-unknown -verify
   2 // rdar://9103192
   3
   4 void vf(void);
   5 int if1(void);
   6 char if2(void);
   7 long if3(void);
   8 float rf1(void);
   9 double rf2(void);
  10 _Complex double cf(void);
  11 enum e { E1 } ef(void);
  12 _Bool bf(void);
  13 char *pf1(void);
  14 int *pf2(void);
  15
  16 void
  17 foo(void)
  18 {
  19   /* Casts to void types are always OK.  */
  20   (void)vf();
  21   (void)if1();
  22   (void)cf();
  23   (const void)bf();
  24   /* Casts to the same type or similar types are OK.  */
  25   (int)if1();
  26   (long)if2();
  27   (char)if3();
  28   (float)rf1();
  29   (long double)rf2();
  30   (_Complex float)cf();
  31   (enum f { F1 })ef();
  32   (_Bool)bf();
  33   (void *)pf1();
  34   (char *)pf2();
  35   /* All following casts issue warning */
  36   (float)if1(); /* expected-warning {{cast from function call of type 'int' to non-matching type 'float'}} */
  37   (double)if2(); /* expected-warning {{cast from function call of type 'char' to non-matching type 'double'}} */
  38   (_Bool)if3(); /* expected-warning {{cast from function call of type 'long' to non-matching type '_Bool'}} */
  39   (int)rf1(); /* expected-warning {{cast from function call of type 'float' to non-matching type 'int'}} */
  40   (long)rf2(); /* expected-warning {{cast from function call of type 'double' to non-matching type 'long'}} */
  41   (double)cf(); /* expected-warning {{cast from function call of type '_Complex double' to non-matching type 'double'}} */
  42   (int)ef(); /* expected-warning {{cast from function call of type 'enum e' to non-matching type 'int'}} */
  43   (int)bf(); /* expected-warning {{cast from function call of type '_Bool' to non-matching type 'int'}} */
  44   (__SIZE_TYPE__)pf1(); /* expected-warning {{cast from function call of type 'char *' to non-matching type 'unsigned long'}} */
  45   (__PTRDIFF_TYPE__)pf2(); /* expected-warning {{cast from function call of type 'int *' to non-matching type 'long'}} */
  46 }
  47