gcc/testsuite/gdc.test/fail_compilation/fail22118.d

   1 // https://issues.dlang.org/show_bug.cgi?id=22118
   2
   3 /*
   4 TEST_OUTPUT:
   5 ---
   6 fail_compilation/fail22118.d(33): Error: cannot modify `this.v.a` in `const` function
   7 ---
   8 */
   9
  10 struct NeedsInit
  11 {
  12     int n;
  13     @disable this();
  14 }
  15
  16 union U
  17 {
  18     NeedsInit a;
  19 }
  20
  21 struct V
  22 {
  23     NeedsInit a;
  24 }
  25
  26 struct S
  27 {
  28     U u;
  29     V v;
  30     this(const NeedsInit arg) const
  31     {
  32         u.a = arg;   // this should compile
  33         v.a = arg;   // this should not
  34     }
  35 }