[rustc.git] / src / test / ui / issues / issue-17263.rs

// check-pass

#![feature(box_syntax)]

struct Foo { a: isize, b: isize }

fn main() {
    let mut x: Box<_> = box Foo { a: 1, b: 2 };
    let (a, b) = (&mut x.a, &mut x.b);

    let mut foo: Box<_> = box Foo { a: 1, b: 2 };
    let (c, d) = (&mut foo.a, &foo.b);

    // We explicitly use the references created above to illustrate that the
    // borrow checker is accepting this code *not* because of artificially
    // short lifetimes, but rather because it understands that all the
    // references are of disjoint parts of memory.
    use_imm(d);
    use_mut(c);
    use_mut(b);
    use_mut(a);
}

fn use_mut<T>(_: &mut T) { }
fn use_imm<T>(_: &T) { }
Commit	Line	Data
d9bb1a4e	1	// check-pass
1a4d82fc	2
48663c56	3	#![feature(box_syntax)]
1a4d82fc JJ	4
1a4d82fc JJ	5	struct Foo { a: isize, b: isize }
48663c56 XL	6
48663c56 XL	7	fn main() {
c34b1796	8	let mut x: Box<_> = box Foo { a: 1, b: 2 };
1a4d82fc	9	let (a, b) = (&mut x.a, &mut x.b);
1a4d82fc	10
c34b1796	11	let mut foo: Box<_> = box Foo { a: 1, b: 2 };
1a4d82fc	12	let (c, d) = (&mut foo.a, &foo.b);
a1dfa0c6	13
48663c56 XL	14	// We explicitly use the references created above to illustrate that the
48663c56 XL	15	// borrow checker is accepting this code not because of artificially
a1dfa0c6 XL	16	// short lifetimes, but rather because it understands that all the
	17	// references are of disjoint parts of memory.
	18	use_imm(d);
	19	use_mut(c);
	20	use_mut(b);
	21	use_mut(a);
1a4d82fc	22	}
a1dfa0c6 XL	23
	24	fn use_mut<T>(_: &mut T) { }
	25	fn use_imm<T>(_: &T) { }