mirror of https://github.com/rust-lang/rust
26 lines
658 B
Rust
26 lines
658 B
Rust
// Test that impl trait does not allow creating recursive types that are
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// otherwise forbidden. Even when there's an opaque type in another crate
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// hiding this.
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fn id<T>(t: T) -> impl Sized { t }
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fn recursive_id() -> impl Sized { //~ ERROR cannot resolve opaque type
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id(recursive_id2())
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}
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fn recursive_id2() -> impl Sized { //~ ERROR cannot resolve opaque type
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id(recursive_id())
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}
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fn wrap<T>(t: T) -> impl Sized { (t,) }
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fn recursive_wrap() -> impl Sized { //~ ERROR cannot resolve opaque type
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wrap(recursive_wrap2())
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}
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fn recursive_wrap2() -> impl Sized { //~ ERROR cannot resolve opaque type
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wrap(recursive_wrap())
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}
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fn main() {}
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