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https://github.com/rust-lang/rust
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20 lines
463 B
Rust
20 lines
463 B
Rust
//@ compile-flags: -Znext-solver
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//@ check-pass
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// Makes sure we don't prepopulate the MIR typeck of `define`
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// with `Foo<T, U> = T`, but instead, `Foo<B, A> = B`, so that
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// the param-env predicates actually apply.
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#![feature(type_alias_impl_trait)]
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type Foo<T: Send, U> = impl NeedsSend<T>;
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trait NeedsSend<T> {}
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impl<T: Send> NeedsSend<T> for T {}
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fn define<A, B: Send>(a: A, b: B, _: Foo<B, A>) {
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let y: Option<Foo<B, A>> = Some(b);
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}
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fn main() {}
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