gcc/testsuite/gcc.dg/Wstring-literal-comparison-1.c

   1 /* PR c/7776 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wstring-literal-comparison" } */
   4
   5 int test1(char *ptr)
   6 {
   7   return ptr == "foo";  /* { dg-warning "comparison with string" } */
   8 }
   9
  10 int test2()
  11 {
  12   return "foo" != (const char*)0;
  13 }
  14
  15 int test3()
  16 {
  17   return "foo" == (const char*)0;
  18 }
  19
  20 int test4()
  21 {
  22   return (const char*)0 != "foo";
  23 }
  24
  25 int test5()
  26 {
  27   return (const char*)0 == "foo";
  28 }
  29