mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-18 03:25:55 +00:00
25 lines
877 B
Rust
25 lines
877 B
Rust
// Regression test for #54302.
|
|
//
|
|
// We were incorrectly using the "evaluation cache" (which ignored
|
|
// region results) to conclude that `&'static str: Deserialize`, even
|
|
// though it would require that `for<'de> 'de: 'static`, which is
|
|
// clearly false.
|
|
|
|
trait Deserialize<'de> {}
|
|
|
|
trait DeserializeOwned: for<'de> Deserialize<'de> {}
|
|
impl<T> DeserializeOwned for T where T: for<'de> Deserialize<'de> {}
|
|
|
|
// Based on this impl, `&'static str` only implements Deserialize<'static>.
|
|
// It does not implement for<'de> Deserialize<'de>.
|
|
impl<'de: 'a, 'a> Deserialize<'de> for &'a str {}
|
|
|
|
fn main() {
|
|
fn assert_deserialize_owned<T: DeserializeOwned>() {}
|
|
assert_deserialize_owned::<&'static str>(); //~ ERROR
|
|
|
|
// It correctly does not implement for<'de> Deserialize<'de>.
|
|
// fn assert_hrtb<T: for<'de> Deserialize<'de>>() {}
|
|
// assert_hrtb::<&'static str>();
|
|
}
|