src/test/ui/issues/issue-28936.rs

   1 // compile-pass
   2 pub type Session = i32;
   3 pub struct StreamParser<'a, T> {
   4     _tokens: T,
   5     _session: &'a mut Session,
   6 }
   7
   8 impl<'a, T> StreamParser<'a, T> {
   9     pub fn thing(&mut self) -> bool { true }
  10 }
  11
  12 pub fn parse_stream<T: Iterator<Item=i32>, U, F>(
  13         _session: &mut Session, _tokens: T, _f: F) -> U
  14     where F: Fn(&mut StreamParser<T>) -> U { panic!(); }
  15
  16 pub fn thing(session: &mut Session) {
  17     let mut stream = vec![1, 2, 3].into_iter();
  18
  19     let _b = parse_stream(session,
  20                           stream.by_ref(),
  21                           // replacing the above with the following fixes it
  22                           //&mut stream,
  23                           |p| p.thing());
  24
  25 }
  26
  27 fn main() {}