20 lines
710 B
Rust
20 lines
710 B
Rust
trait Deserialize<'de> {}
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trait DeserializeOwned: for<'de> Deserialize<'de> {}
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impl<T> DeserializeOwned for T where T: for<'de> Deserialize<'de> {}
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// Based on this impl, `&'static str` only implements Deserialize<'static>.
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// It does not implement for<'de> Deserialize<'de>.
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impl<'de: 'a, 'a> Deserialize<'de> for &'a str {}
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fn main() {
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// Then why does it implement DeserializeOwned? This compiles.
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fn assert_deserialize_owned<T: DeserializeOwned>() {}
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assert_deserialize_owned::<&'static str>();
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//~^ ERROR not general enough
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// It correctly does not implement for<'de> Deserialize<'de>.
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//fn assert_hrtb<T: for<'de> Deserialize<'de>>() {}
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//assert_hrtb::<&'static str>();
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}
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