gcc/testsuite/gdc.dg/pr96156b.d

   1 @safe unittest
   2 {
   3     struct CustomString
   4     {
   5     @safe:
   6         string _impl;
   7         @property bool empty() const { return !_impl.length; }
   8     }
   9
  10     CustomString find(CustomString a, CustomString b)
  11     {
  12         return CustomString.init;
  13     }
  14
  15     auto r = find(CustomString("a"), CustomString("b"));
  16     assert(r.empty);
  17 }