gcc/testsuite/gcc.dg/switch-5.c

   1 /* Test diagnostics for switch statements and labels therein.  Test
   2    with no special options.  */
   3 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   4 /* { dg-do compile } */
   5 /* { dg-options "" } */
   6
   7 void
   8 f (int a, double d, void *p)
   9 {
  10   switch (d) /* { dg-error "switch quantity not an integer" } */
  11     {
  12     }
  13   switch (p) /* { dg-error "switch quantity not an integer" } */
  14     {
  15     }
  16   switch (a)
  17     {
  18     case (void *)0: ; /* { dg-error "pointers are not permitted as case values" } */
  19     }
  20   switch (a)
  21     {
  22     case (double)0: ; /* { dg-error "case label does not reduce to an integer constant" } */
  23     }
  24   switch (a)
  25     {
  26     case (char)0: ;
  27     }
  28   switch (a)
  29     {
  30     case 0 ... 0: ;
  31     }
  32   switch (a)
  33     {
  34     case 0 ... -1: ; /* { dg-warning "empty range specified" } */
  35     }
  36   switch (a)
  37     {
  38     case 0 ... -2: ; /* { dg-warning "empty range specified" } */
  39     }
  40   switch (a)
  41     {
  42     case 0:
  43     default: /* { dg-message "this is the first default label" } */
  44     case 1:
  45     default: ; /* { dg-error "multiple default labels in one switch" } */
  46     }
  47   switch (a)
  48     {
  49     case 0: /* { dg-message "previously used here" } */
  50     case 1:
  51     case 0: ; /* { dg-error "duplicate case value" } */
  52     }
  53  case 1: ; /* { dg-error "case label not within a switch statement" } */
  54  default: ; /* { dg-error "'default' label not within a switch statement" } */
  55    break; /* { dg-error "break statement not within loop or switch" } */
  56    continue; /* { dg-error "continue statement not within a loop" } */
  57    switch (a)
  58      {
  59      case a: ; /* { dg-error "case label does not reduce to an integer constant" } */
  60      }
  61    switch (a)
  62      {
  63      case 0: /* { dg-message "this is the first entry overlapping that value" } */
  64      case -1 ... 1: /* { dg-error "duplicate \\(or overlapping\\) case value" } */
  65      case 2 ... 3: /* { dg-message "previously used here" } */
  66      case 2: /* { dg-error "duplicate case value" } */
  67      case 4 ... 7: /* { dg-message "this is the first entry overlapping that value" } */
  68      case 6 ... 9: ; /* { dg-error "duplicate \\(or overlapping\\) case value" } */
  69      }
  70    switch (a)
  71      {
  72      case 0:
  73        continue; /* { dg-error "continue statement not within a loop" } */
  74      }
  75 }