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

28 lines
575 B
Rust

// This assumes the packed and non-packed structs are different sizes.
// the error points to the start of the file, not the line with the
// transmute
//@ error-pattern: cannot transmute between types of different sizes, or dependently-sized types
use std::mem;
#[repr(packed)]
struct Foo<T,S> {
bar: T,
baz: S
}
struct Oof<T, S> {
rab: T,
zab: S
}
fn main() {
let foo = Foo { bar: [1u8, 2, 3, 4, 5], baz: 10i32 };
unsafe {
let oof: Oof<[u8; 5], i32> = mem::transmute(foo);
println!("{:?} {:?}", &oof.rab[..], oof.zab);
}
}