gcc/testsuite/gdc.test/fail_compilation/test14238.d

   1 /* REQUIRED_ARGS: -preview=dip1000
   2    TEST_OUTPUT:
   3 ---
   4 fail_compilation/test14238.d(20): Error: scope parameter `fn` may not be returned
   5 fail_compilation/test14238.d(28): Error: escaping reference to stack allocated value returned by `&baz`
   6 ---
   7 */
   8 // https://issues.dlang.org/show_bug.cgi?id=14238
   9
  10 @safe:
  11
  12 alias Fn = ref int delegate() return;
  13
  14 ref int foo(return scope Fn fn)
  15 {
  16     return fn(); // Ok
  17 }
  18
  19 ref int foo2(scope Fn fn) {
  20     return fn(); // Error
  21 }
  22
  23 ref int bar() {
  24     int x;
  25     ref int baz() {
  26             return x;
  27     }
  28     return foo(&baz);
  29 }