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