26 lines
477 B
Rust
26 lines
477 B
Rust
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// check-pass
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use std::future::Future;
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pub trait Service {
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type Response;
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type Future: Future<Output = Self::Response>;
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}
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pub trait A1: Service<Response = i32> {}
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pub trait A2: Service<Future = Box<dyn Future<Output = i32>>> + A1 {
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fn foo(&self) {}
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}
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pub trait B1: Service<Future = Box<dyn Future<Output = i32>>> {}
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pub trait B2: Service<Response = i32> + B1 {
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fn foo(&self) {}
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}
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fn main() {
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let x: &dyn A2 = todo!();
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let x: &dyn B2 = todo!();
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}
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