src/test/ui/associated-types/associated-types-normalize-in-bounds.rs

   1 // run-pass
   2 #![allow(unused_variables)]
   3 // Test that we normalize associated types that appear in bounds; if
   4 // we didn't, the call to `self.split2()` fails to type check.
   5
   6 // pretty-expanded FIXME #23616
   7
   8 use std::marker::PhantomData;
   9
  10 struct Splits<'a, T, P>(PhantomData<(&'a(),T,P)>);
  11 struct SplitsN<I>(PhantomData<I>);
  12
  13 trait SliceExt2 {
  14     type Item;
  15
  16     fn split2<'a, P>(&'a self, pred: P) -> Splits<'a, Self::Item, P>
  17         where P: FnMut(&Self::Item) -> bool;
  18     fn splitn2<'a, P>(&'a self, n: usize, pred: P) -> SplitsN<Splits<'a, Self::Item, P>>
  19         where P: FnMut(&Self::Item) -> bool;
  20 }
  21
  22 impl<T> SliceExt2 for [T] {
  23     type Item = T;
  24
  25     fn split2<P>(&self, pred: P) -> Splits<T, P> where P: FnMut(&T) -> bool {
  26         loop {}
  27     }
  28
  29     fn splitn2<P>(&self, n: usize, pred: P) -> SplitsN<Splits<T, P>> where P: FnMut(&T) -> bool {
  30         self.split2(pred);
  31         loop {}
  32     }
  33 }
  34
  35 fn main() { }