gcc/testsuite/gdc.test/fail_compilation/fail13577.d

   1 // https://issues.dlang.org/show_bug.cgi?id=13577
   2
   3 /*
   4 TEST_OUTPUT:
   5 ---
   6 fail_compilation/fail13577.d(27): Error: cannot implicilty convert range element of type `int[]` to variable `x` of type `immutable(int[])`
   7 ---
   8 */
   9
  10 struct Tuple(Types...)
  11 {
  12     Types items;
  13     alias items this;
  14 }
  15
  16 struct Range(T)
  17 {
  18     T[] arr;
  19     alias ElemType = Tuple!(int, T);
  20     ElemType front() { return typeof(return)(0, arr[0]); }
  21     bool empty() { return false; }
  22     void popFront() {}
  23 }
  24
  25 void main()
  26 {
  27     foreach (immutable i, immutable x; Range!(int[])()) {} // Error
  28 }