[rustc.git] / src / test / ui / rfc1445 / allow-hide-behind-direct-unsafe-ptr-embedded.rs

// Test explores how `#[structral_match]` behaves in tandem with
// `*const` and `*mut` pointers.

// run-pass

struct NoDerive(i32);

// This impl makes NoDerive irreflexive
// (which doesn't matter here because `<*const T>::eq` won't recur on `T`).
impl PartialEq for NoDerive { fn eq(&self, _: &Self) -> bool { false } }

impl Eq for NoDerive { }

#[derive(PartialEq, Eq)]
struct WrapEmbedded(*const NoDerive);

const WRAP_UNSAFE_EMBEDDED: WrapEmbedded = WrapEmbedded(std::ptr::null());

fn main() {
    match WRAP_UNSAFE_EMBEDDED {
        WRAP_UNSAFE_EMBEDDED => { println!("WRAP_UNSAFE_EMBEDDED correctly matched itself"); }
        _ => { panic!("WRAP_UNSAFE_EMBEDDED did not match itself"); }
    }
}
Commit	Line	Data
416331ca XL	1	// Test explores how `#[structral_match]` behaves in tandem with
	2	// `const` and `mut` pointers.
	3
	4	// run-pass
	5
	6	struct NoDerive(i32);
	7
	8	// This impl makes NoDerive irreflexive
	9	// (which doesn't matter here because `<*const T>::eq` won't recur on `T`).
	10	impl PartialEq for NoDerive { fn eq(&self, _: &Self) -> bool { false } }
	11
	12	impl Eq for NoDerive { }
	13
	14	#[derive(PartialEq, Eq)]
	15	struct WrapEmbedded(*const NoDerive);
	16
	17	const WRAP_UNSAFE_EMBEDDED: WrapEmbedded = WrapEmbedded(std::ptr::null());
	18
	19	fn main() {
	20	match WRAP_UNSAFE_EMBEDDED {
	21	WRAP_UNSAFE_EMBEDDED => { println!("WRAP_UNSAFE_EMBEDDED correctly matched itself"); }
	22	_ => { panic!("WRAP_UNSAFE_EMBEDDED did not match itself"); }
	23	}
	24	}