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

   1 /+
   2 TEST_OUTPUT:
   3 ---
   4 fail_compilation/must_use.d(15): Error: ignored value of `@mustuse` type `must_use.S`; prepend a `cast(void)` if intentional
   5 ---
   6 +/
   7 import core.attribute;
   8
   9 @mustuse struct S {}
  10
  11 S fun() { return S(); }
  12
  13 void test()
  14 {
  15     fun();
  16 }