src/test/ui/dropck/dropck_no_diverge_on_nonregular_2.rs

   1 // Issue 22443: Reject code using non-regular types that would
   2 // otherwise cause dropck to loop infinitely.
   3
   4 use std::marker::PhantomData;
   5
   6 struct Digit<T> {
   7     elem: T
   8 }
   9
  10 struct Node<T:'static> { m: PhantomData<&'static T> }
  11
  12 enum FingerTree<T:'static> {
  13     Single(T),
  14     // Bug report said Digit before Box would infinite loop (versus
  15     // Digit after Box; see dropck_no_diverge_on_nonregular_1).
  16     Deep(
  17         Digit<T>,
  18         Box<FingerTree<Node<T>>>,
  19         )
  20 }
  21
  22 fn main() {
  23     let ft = //~ ERROR overflow while adding drop-check rules for FingerTree
  24         FingerTree::Single(1);
  25 }