Function zeroizing_dyn_trait

zeroize/tests/zeroize.rs:266–304

()

// expected.
#[test]
fn zeroizing_dyn_trait() {
    trait TestTrait: Zeroize {
        fn data(&self) -> &[u8];
    }

    struct TestStruct {
        data: [u8; 4],
    }

    impl Zeroize for TestStruct {
        fn zeroize(&mut self) {
            self.data.zeroize();
        }
    }

    impl Drop for TestStruct {
        fn drop(&mut self) {
            self.zeroize();
        }
    }

    impl TestTrait for TestStruct {
        fn data(&self) -> &[u8] {
            &self.data
        }
    }

    let mut b: Box<Zeroizing<dyn TestTrait>> =
        Box::new(Zeroizing::new(TestStruct { data: [1, 2, 3, 4] }));

    unsafe {
        ptr::drop_in_place(&raw mut *b);
    }

    let inner: &Zeroizing<dyn TestTrait> = &b;
    let inner: &dyn TestTrait = core::ops::Deref::deref(inner);

    assert_eq!(inner.data(), &[0, 0, 0, 0]);
}