gcc/testsuite/gdc.test/fail_compilation/ice12174.d

   1 /*
   2 TEST_OUTPUT:
   3 ---
   4 fail_compilation/ice12174.d(12): Error: no property `sum` for `[1, 2, 3]` of type `int[]`
   5 fail_compilation/ice12174.d(20): Error: CTFE failed because of previous errors in `this`
   6 fail_compilation/ice12174.d(13):        called from here: `filter([1, 2, 3])`
   7 ---
   8 */
   9
  10 void main()
  11 {
  12     enum foo3 = (int n) => [1,2,3].sum;
  13     enum bar3 = [1,2,3].filter!(n => n % foo3(n) == 0);
  14 }
  15
  16 template filter(alias pred)
  17 {
  18     auto filter(Range)(Range rs)
  19     {
  20         return FilterResult!(pred, Range)(rs);
  21     }
  22 }
  23
  24 private struct FilterResult(alias pred, R)
  25 {
  26     R _input;
  27
  28     this(R r)
  29     {
  30         _input = r;
  31         while (_input.length && !pred(_input[0]))
  32         {
  33             _input = _input[1..$];
  34         }
  35     }
  36
  37     @property bool empty() { return _input.length == 0; }
  38
  39     @property auto ref front()
  40     {
  41         return _input[0];
  42     }
  43
  44     void popFront()
  45     {
  46         do
  47         {
  48             _input = _input[1..$];
  49         } while (_input.length && !pred(_input[0]));
  50     }
  51 }