gcc/testsuite/gdc.test/fail_compilation/issue20704.d

   1 /* TEST_OUTPUT:
   2 ---
   3 fail_compilation/issue20704.d(17): Error: cannot create default argument for `ref` / `out` parameter from constant `0`
   4 fail_compilation/issue20704.d(28): Error: template instance `issue20704.f2!int` error instantiating
   5 fail_compilation/issue20704.d(19): Error: cannot create default argument for `ref` / `out` parameter from constant `0`
   6 fail_compilation/issue20704.d(30): Error: template instance `issue20704.f4!int` error instantiating
   7 fail_compilation/issue20704.d(17): Error: cannot create default argument for `ref` / `out` parameter from expression `S(0)` because it is not an lvalue
   8 fail_compilation/issue20704.d(36): Error: template instance `issue20704.f2!(S)` error instantiating
   9 fail_compilation/issue20704.d(17): Error: cannot create default argument for `ref` / `out` parameter from expression `null` because it is not an lvalue
  10 fail_compilation/issue20704.d(38): Error: template instance `issue20704.f2!(C)` error instantiating
  11 ---
  12 */
  13
  14 // https://issues.dlang.org/show_bug.cgi?id=20704
  15
  16 void f1(T)(const auto ref T arg = T.init) {}
  17 void f2(T)(const      ref T arg = T.init) {}
  18 void f3(T)(const auto ref T arg = 0) {}
  19 void f4(T)(const      ref T arg = 0) {}
  20
  21 struct S { int _; }
  22 class C { int _; }
  23
  24 void main ()
  25 {
  26     int i;
  27     f1!int(i);
  28     f2!int(i);
  29     f3!int(i);
  30     f4!int(i);
  31     f1!int();
  32     f2!int();
  33     f3!int();
  34     f4!int();
  35     f1!S();
  36     f2!S();
  37     f1!C();
  38     f2!C();
  39 }