gcc/testsuite/g++.dg/ext/case-range2.C

   1 // { dg-do compile }
   2 // Tests if case ranges (a GNU extension) correctly emit messages
   3 // about overlapping ranges.
   4 // { dg-options "" }
   5
   6 const int low = -2;
   7 const int high = 15;
   8
   9 template <typename T>
  10 T f2 (T i)
  11 {
  12   switch (i)
  13   {
  14     case low ... high : return i + 1;  // { dg-message "previously" }
  15     case 5 : return i + 2;             // { dg-error "duplicate" }
  16     default : return 0;
  17   }
  18 }
  19
  20 int f (int i)
  21 {
  22   switch (i) {
  23     case 1 ... 10: return i + 1;       // { dg-message "first entry" }
  24     case 3 ... 5 : return i + 3;       // { dg-error "duplicate" }
  25     default: return f2 (i);            // { dg-message "required" }
  26   }
  27 }