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//@ 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;
}
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