38 lines
770 B
Rust
38 lines
770 B
Rust
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// check-pass
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// Related to crater regressions on #118553
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pub trait Debug {}
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pub trait Service {
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type Input;
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type Output;
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type Error;
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}
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pub struct ServiceChain<P, S> {
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prev: P,
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service: S,
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}
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impl<P: Service, S: Service<Input = P::Output>> Service for ServiceChain<P, S>
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where
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P::Error: 'static,
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S::Error: 'static,
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{
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type Input = P::Input;
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type Output = S::Output;
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type Error = ();
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}
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pub struct ServiceChainBuilder<P: Service, S: Service<Input = P::Output>> {
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chain: ServiceChain<P, S>,
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}
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impl<P: Service, S: Service<Input = P::Output>> ServiceChainBuilder<P, S> {
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pub fn next<NS: Service<Input = S::Output>>(
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self,
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) -> ServiceChainBuilder<ServiceChain<P, S>, NS> {
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panic!();
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}
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}
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fn main() {}
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