| // run-pass |
| |
| pub trait Stream { |
| type Item; |
| type Error; |
| } |
| |
| pub trait ParseError<I> { |
| type Output; |
| } |
| |
| impl ParseError<char> for u32 { |
| type Output = (); |
| } |
| |
| impl Stream for () { |
| type Item = char; |
| type Error = u32; |
| } |
| |
| pub struct Lex<'a, I> |
| where I: Stream, |
| I::Error: ParseError<char>, |
| <<I as Stream>::Error as ParseError<char>>::Output: 'a |
| { |
| x: &'a <I::Error as ParseError<char>>::Output |
| } |
| |
| pub struct Reserved<'a, I> where |
| I: Stream<Item=char> + 'a, |
| I::Error: ParseError<I::Item>, |
| <<I as Stream>::Error as ParseError<char>>::Output: 'a |
| |
| { |
| x: Lex<'a, I> |
| } |
| |
| fn main() { |
| let r: Reserved<()> = Reserved { |
| x: Lex { |
| x: &() |
| } |
| }; |
| |
| let _v = r.x.x; |
| } |