32 lines
609 B
Rust
32 lines
609 B
Rust
// Check that when we test the supertrait we ensure consistent use of
|
|
// lifetime parameters. In this case, implementing T2<'a,'b> requires
|
|
// an impl of T1<'a>, but we have an impl of T1<'b>.
|
|
|
|
trait T1<'x> {
|
|
fn x(&self) -> &'x isize;
|
|
}
|
|
|
|
trait T2<'x, 'y> : T1<'x> {
|
|
fn y(&self) -> &'y isize;
|
|
}
|
|
|
|
struct S<'a, 'b> {
|
|
a: &'a isize,
|
|
b: &'b isize
|
|
}
|
|
|
|
impl<'a,'b> T1<'b> for S<'a, 'b> {
|
|
fn x(&self) -> &'b isize {
|
|
self.b
|
|
}
|
|
}
|
|
|
|
impl<'a,'b> T2<'a, 'b> for S<'a, 'b> { //~ ERROR cannot infer an appropriate lifetime
|
|
fn y(&self) -> &'b isize {
|
|
self.b
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
}
|