39 lines
648 B
Rust
39 lines
648 B
Rust
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// check-pass
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// compile-flags: -Ztrait-solver=next
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// Issue 96750
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use std::marker::PhantomData;
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trait AsyncFn<Arg> {
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type Output;
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}
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trait RequestFamily {
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type Type<'a>;
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}
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trait Service {}
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struct MyFn;
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impl AsyncFn<String> for MyFn {
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type Output = ();
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}
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impl RequestFamily for String {
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type Type<'a> = String;
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}
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struct ServiceFromAsyncFn<F, Req>(F, PhantomData<Req>);
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impl<F, Req, O> Service for ServiceFromAsyncFn<F, Req>
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where
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Req: RequestFamily,
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F: AsyncFn<Req>,
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F: for<'a> AsyncFn<Req::Type<'a>, Output = O>,
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{
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}
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fn assert_service() -> impl Service {
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ServiceFromAsyncFn(MyFn, PhantomData)
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}
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fn main() {}
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