| //@ run-pass | |
| pub trait Parser { | |
| type Input; | |
| } | |
| pub struct Iter<P: Parser>(#[allow(dead_code)] P, P::Input); | |
| #[allow(dead_code)] | |
| pub struct Map<P, F>(P, F); | |
| impl<P, F> Parser for Map<P, F> where F: FnMut(P) { | |
| type Input = u8; | |
| } | |
| trait AstId { type Untyped; } | |
| impl AstId for u32 { type Untyped = u32; } | |
| fn record_type<Id: AstId>(i: Id::Untyped) -> u8 { | |
| Iter(Map(i, |_: Id::Untyped| {}), 42).1 | |
| } | |
| pub fn main() { | |
| assert_eq!(record_type::<u32>(3), 42); | |
| } |