mirror of https://github.com/rust-lang/rust.git
51 lines
1.5 KiB
Rust
51 lines
1.5 KiB
Rust
#![deny(suspicious_auto_trait_impls)]
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use std::marker::PhantomData;
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struct MayImplementSendOk<T>(T);
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unsafe impl<T: Send> Send for MayImplementSendOk<T> {} // ok
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struct MayImplementSendErr<T>(T);
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unsafe impl<T: Send> Send for MayImplementSendErr<&T> {}
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//~^ ERROR
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//~| WARNING this will change its meaning
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struct ContainsNonSendDirect<T>(*const T);
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unsafe impl<T: Send> Send for ContainsNonSendDirect<&T> {} // ok
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struct ContainsPtr<T>(*const T);
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struct ContainsIndirectNonSend<T>(ContainsPtr<T>);
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unsafe impl<T: Send> Send for ContainsIndirectNonSend<&T> {} // ok
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struct ContainsVec<T>(Vec<T>);
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unsafe impl Send for ContainsVec<i32> {}
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//~^ ERROR
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//~| WARNING this will change its meaning
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struct TwoParams<T, U>(T, U);
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unsafe impl<T: Send, U: Send> Send for TwoParams<T, U> {} // ok
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struct TwoParamsFlipped<T, U>(T, U);
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unsafe impl<T: Send, U: Send> Send for TwoParamsFlipped<U, T> {} // ok
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struct TwoParamsSame<T, U>(T, U);
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unsafe impl<T: Send> Send for TwoParamsSame<T, T> {}
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//~^ ERROR
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//~| WARNING this will change its meaning
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pub struct WithPhantomDataNonSend<T, U>(PhantomData<*const T>, U);
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unsafe impl<T> Send for WithPhantomDataNonSend<T, i8> {} // ok
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pub struct WithPhantomDataSend<T, U>(PhantomData<T>, U);
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unsafe impl<T> Send for WithPhantomDataSend<*const T, i8> {}
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//~^ ERROR
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//~| WARNING this will change its meaning
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pub struct WithLifetime<'a, T>(&'a (), T);
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unsafe impl<T> Send for WithLifetime<'static, T> {} // ok
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unsafe impl<T> Sync for WithLifetime<'static, Vec<T>> {}
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//~^ ERROR
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//~| WARNING this will change its meaning
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fn main() {}
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