1 /// "Signaling" trait used in impl trait to tag lifetimes that you may 2 /// need to capture but don't really need for other reasons. 3 /// Basically a workaround; see [this comment] for details. 4 /// 5 /// [this comment]: https://github.com/rust-lang/rust/issues/34511#issuecomment-373423999 6 pub trait Captures<'a> {} 7 8 impl<'a, T: ?Sized> Captures<'a> for T {} 9