20 lines
316 B
Rust
20 lines
316 B
Rust
// check-pass
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// compile-flags: -Znext-solver
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#![feature(trait_upcasting)]
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pub trait A {}
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pub trait B: A {}
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pub trait Mirror {
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type Assoc: ?Sized;
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}
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impl<T: ?Sized> Mirror for T {
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type Assoc = T;
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}
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pub fn foo<'a>(x: &'a <dyn B + 'static as Mirror>::Assoc) -> &'a (dyn A + 'static) {
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x
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}
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fn main() {}
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