File: safety-trait-impl.rs

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rustc 1.85.0%2Bdfsg3-1
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// Check that unsafe traits require unsafe impls and that inherent
// impls cannot be unsafe.

trait SafeTrait {
    fn foo(&self) { }
}

unsafe trait UnsafeTrait {
    fn foo(&self) { }
}

unsafe impl UnsafeTrait for u8 { } // OK

impl UnsafeTrait for u16 { } //~ ERROR requires an `unsafe impl` declaration

unsafe impl SafeTrait for u32 { } //~ ERROR the trait `SafeTrait` is not unsafe

fn main() { }