mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-29 18:23:49 +00:00
20 lines
710 B
Rust
20 lines
710 B
Rust
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() {
|
|
// Then why does it implement DeserializeOwned? This compiles.
|
|
fn assert_deserialize_owned<T: DeserializeOwned>() {}
|
|
assert_deserialize_owned::<&'static str>();
|
|
//~^ ERROR not general enough
|
|
|
|
// It correctly does not implement for<'de> Deserialize<'de>.
|
|
//fn assert_hrtb<T: for<'de> Deserialize<'de>>() {}
|
|
//assert_hrtb::<&'static str>();
|
|
}
|