rust/tests/ui/union/union-transmute.rs
2024-02-16 20:02:50 +00:00

26 lines
467 B
Rust

//@ run-pass
union U {
a: (u8, u8),
b: u16,
}
union W {
a: u32,
b: f32,
}
fn main() {
unsafe {
let mut u = U { a: (1, 1) };
assert_eq!(u.b, (1 << 8) + 1);
u.b = (2 << 8) + 2;
assert_eq!(u.a, (2, 2));
let mut w = W { a: 0b0_11111111_00000000000000000000000 };
assert_eq!(w.b, f32::INFINITY);
w.b = f32::NEG_INFINITY;
assert_eq!(w.a, 0b1_11111111_00000000000000000000000);
}
}