mirror of https://github.com/rust-lang/rust
23 lines
468 B
Rust
23 lines
468 B
Rust
//@ edition:2021
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#![feature(type_alias_impl_trait)]
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struct CallMe;
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type ReturnType<'a> = impl std::future::Future<Output = u32> + 'a;
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type FnType = impl Fn(&u32) -> ReturnType;
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impl std::ops::Deref for CallMe {
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type Target = FnType;
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fn deref(&self) -> &Self::Target {
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fn inner(val: &u32) -> ReturnType {
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async move { *val * 2 }
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}
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&inner //~ ERROR: expected generic lifetime parameter, found `'_`
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}
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}
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fn main() {}
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