rust/src/test/ui/lint/packed_reference.rs

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#![deny(packed_references)]
#[repr(packed)]
pub struct Good {
data: &'static u32,
data2: [&'static u32; 2],
aligned: [u8; 32],
}
fn main() {
unsafe {
let good = Good { data: &0, data2: [&0, &0], aligned: [0; 32] };
let _ = &good.data; //~ ERROR reference to packed field
let _ = &good.data2[0]; //~ ERROR reference to packed field
let _ = &*good.data; // ok, behind a pointer
let _ = &good.aligned; // ok, has align 1
let _ = &good.aligned[2]; // ok, has align 1
}
}