gcc/testsuite/gcc.dg/Wchar-subscripts-1.c

   1 /* Test -Wchar-subscripts.  */
   2 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   3 /* { dg-do compile } */
   4 /* { dg-options "-Wchar-subscripts" } */
   5
   6 extern int a[];
   7 int *p;
   8 char c;
   9 signed char sc;
  10 unsigned char uc;
  11
  12 void
  13 f (void)
  14 {
  15   a[sc];
  16   a[uc];
  17   sc[a];
  18   uc[a];
  19   p[sc];
  20   p[uc];
  21   sc[p];
  22   uc[p];
  23   a[c]; /* { dg-warning "warning: array subscript has type 'char'" } */
  24   p[c]; /* { dg-warning "warning: array subscript has type 'char'" } */
  25   /* -Wchar-subscripts does not warn if the char is not syntactically
  26       the subscript.  */
  27   c[a];
  28   c[p];
  29 }