gcc/testsuite/gcc.dg/format/miss-5.c

   1 /* Test warnings for missing format attributes on function pointers.  */
   2 /* Origin: Kaveh Ghazi <ghazi@caip.rutgers.edu> */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=gnu99 -Wmissing-format-attribute" } */
   5
   6 #define DONT_GNU_PROTOTYPE
   7 #include "format.h"
   8
   9 typedef void (*noattr_t) (const char *, ...);
  10 typedef noattr_t __attribute__ ((__format__(gnu_attr___printf__, 1, 2))) attr_t;
  11
  12 typedef void (*vnoattr_t) (const char *, va_list);
  13 typedef vnoattr_t __attribute__ ((__format__(gnu_attr___printf__, 1, 0))) vattr_t;
  14
  15 noattr_t
  16 foo1 (noattr_t na, attr_t a, int i)
  17 {
  18   if (i)
  19     return na;
  20   else
  21     return a; /* { dg-warning "candidate" "return type warning" } */
  22 }
  23
  24 attr_t
  25 foo2 (noattr_t na, attr_t a, int i)
  26 {
  27   if (i)
  28     return na;
  29   else
  30     return a;
  31 }
  32
  33 vnoattr_t
  34 foo3 (vnoattr_t vna, vattr_t va, int i)
  35 {
  36   if (i)
  37     return vna;
  38   else
  39     return va; /* { dg-warning "candidate" "return type warning" } */
  40 }
  41
  42 vattr_t
  43 foo4 (vnoattr_t vna, vattr_t va, int i)
  44 {
  45   if (i)
  46     return vna;
  47   else
  48     return va;
  49 }