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

   1 // RUN: %clang_cc1 %s -fsyntax-only -Wno-unused-value -Wbad-function-cast -ffixed-point -triple x86_64-unknown-unknown -verify
   2
   3 void vf(void);
   4 int if1(void);
   5 char if2(void);
   6 long if3(void);
   7 float rf1(void);
   8 double rf2(void);
   9 _Complex double cf(void);
  10 enum e { E1 } ef(void);
  11 _Bool bf(void);
  12 char *pf1(void);
  13 int *pf2(void);
  14 _Fract ff1(void);
  15
  16 void
  17 foo(void)
  18 {
  19
  20   /* default, no cast, should always be ok */
  21   ff1();
  22   /* Casts to void types are always OK.  */
  23   (void)vf();
  24   (void)if1();
  25   (void)cf();
  26   (const void)bf();
  27   (void)ff1();
  28   /* Casts to the same type or similar types are OK.  */
  29   (int)if1();
  30   (long)if2();
  31   (char)if3();
  32   (float)rf1();
  33   (long double)rf2();
  34   (_Complex float)cf();
  35   (enum f { F1 })ef();
  36   (_Bool)bf();
  37   (void *)pf1();
  38   (char *)pf2();
  39   (_Fract) ff1();
  40   /* All following casts issue warning */
  41   (float)if1(); /* expected-warning {{cast from function call of type 'int' to non-matching type 'float'}} */
  42   (double)if2(); /* expected-warning {{cast from function call of type 'char' to non-matching type 'double'}} */
  43   (_Bool)if3(); /* expected-warning {{cast from function call of type 'long' to non-matching type '_Bool'}} */
  44   (int)rf1(); /* expected-warning {{cast from function call of type 'float' to non-matching type 'int'}} */
  45   (long)rf2(); /* expected-warning {{cast from function call of type 'double' to non-matching type 'long'}} */
  46   (double)cf(); /* expected-warning {{cast from function call of type '_Complex double' to non-matching type 'double'}} */
  47   (int)ef(); /* expected-warning {{cast from function call of type 'enum e' to non-matching type 'int'}} */
  48   (int)bf(); /* expected-warning {{cast from function call of type '_Bool' to non-matching type 'int'}} */
  49   (__SIZE_TYPE__)pf1(); /* expected-warning {{cast from function call of type 'char *' to non-matching type 'unsigned long'}} */
  50   (__PTRDIFF_TYPE__)pf2(); /* expected-warning {{cast from function call of type 'int *' to non-matching type 'long'}} */
  51   (_Fract) if1();          /* expected-warning{{cast from function call of type 'int' to non-matching type '_Fract'}} */
  52   (int)ff1();              /* expected-warning{{cast from function call of type '_Fract' to non-matching type 'int'}} */
  53 }
  54