2 // This is a regression test for something that only came up while
3 // attempting to bootstrap librustc_ast; it is adapted from
4 // `rustc_ast::ext::tt::generic_extension`.
11 pub fn m(&self) -> &'b u8 { self.f }
20 impl<'d> M for P<'d> {
21 fn n(&self) -> u8 { *self.g }
24 fn extension<'e>(x: &'e E<'e>) -> Box<dyn M+'e> {
26 let p = P { g: x.m() };
27 return Box::new(p) as Box<dyn M+'e>;
33 let o = extension(&w);
34 assert_eq!(o.n(), 10);