gcc/testsuite/gcc.dg/Wparentheses-9.c

   1 /* Test operation of -Wparentheses.  Warnings for ambiguous else.  */
   2 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
   3
   4 /* { dg-do compile } */
   5 /* { dg-options "-Wparentheses" } */
   6
   7 int foo (int);
   8
   9 int a, b, c;
  10
  11 int
  12 bar (void)
  13 {
  14   if (a)
  15     foo (0);
  16   if (b)
  17     foo (1);
  18   else
  19     foo (2);
  20   if (c) /* { dg-warning "ambiguous" "correct warning" } */
  21     if (a)
  22       foo (3);
  23     else
  24       foo (4);
  25   if (a)
  26     if (c)
  27       foo (5);
  28   if (a)
  29     if (b) /* { dg-warning "ambiguous" "correct warning" } */
  30       if (c)
  31         foo (6);
  32       else
  33         foo (7);
  34   if (a) /* { dg-warning "ambiguous" "correct warning" } */
  35     if (b)
  36       if (c)
  37         foo (8);
  38       else
  39         foo (9);
  40     else
  41       foo (10);
  42   if (a)
  43     if (b)
  44       if (c)
  45         foo (11);
  46       else
  47         foo (12);
  48     else
  49       foo (13);
  50   else
  51     foo (14);
  52   if (a) {
  53     if (b)
  54       if (c)
  55         foo (15);
  56       else
  57         foo (16);
  58     else
  59       foo (17);
  60   }
  61 }