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https://github.com/rust-lang/rust
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20 lines
474 B
Rust
20 lines
474 B
Rust
// run-rustfix
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#[derive(Clone)]
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struct Wrapper<T>(T);
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struct OnlyCopyIfDisplay<T>(std::marker::PhantomData<T>);
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impl<T: std::fmt::Display> Clone for OnlyCopyIfDisplay<T> {
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fn clone(&self) -> Self {
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OnlyCopyIfDisplay(std::marker::PhantomData)
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}
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}
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impl<T: std::fmt::Display> Copy for OnlyCopyIfDisplay<T> {}
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impl<S: std::fmt::Display> Copy for Wrapper<OnlyCopyIfDisplay<S>> {}
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//~^ ERROR the trait `Copy` cannot be implemented for this type
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fn main() {}
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