34 lines
662 B
Rust
34 lines
662 B
Rust
//@ run-pass
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//@ check-run-results
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#![feature(trait_upcasting)]
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// Test for <https://github.com/rust-lang/rust/issues/135315>.
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trait Supertrait<T> {
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fn _print_numbers(&self, mem: &[usize; 100]) {
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println!("{mem:?}");
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}
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}
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impl<T> Supertrait<T> for () {}
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trait Identity {
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type Selff;
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}
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impl<Selff> Identity for Selff {
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type Selff = Selff;
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}
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trait Middle<T>: Supertrait<()> + Supertrait<T> {
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fn say_hello(&self, _: &usize) {
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println!("Hello!");
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}
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}
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impl<T> Middle<T> for () {}
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trait Trait: Middle<<() as Identity>::Selff> {}
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impl Trait for () {}
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fn main() {
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(&() as &dyn Trait as &dyn Middle<()>).say_hello(&0);
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}
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