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#![feature(extern_types)]
use std::mem::offset_of;
struct Alpha {
x: u8,
y: u16,
z: [u8],
}
trait Trait {}
struct Beta {
x: u8,
y: u16,
z: dyn Trait,
}
extern {
type Extern;
}
struct Gamma {
x: u8,
y: u16,
z: Extern,
}
struct Delta<T: ?Sized> {
x: u8,
y: u16,
z: T,
}
fn main() {
offset_of!(Alpha, z); //~ ERROR the size for values of type
offset_of!(Beta, z); //~ ERROR the size for values of type
offset_of!(Gamma, z); //~ ERROR the size for values of type
offset_of!((u8, dyn Trait), 0); // ok
offset_of!((u8, dyn Trait), 1); //~ ERROR the size for values of type
}
fn delta() {
offset_of!(Delta<Alpha>, z); //~ ERROR the size for values of type
offset_of!(Delta<Extern>, z); //~ ERROR the size for values of type
offset_of!(Delta<dyn Trait>, z); //~ ERROR the size for values of type
}
fn generic_with_maybe_sized<T: ?Sized>() -> usize {
offset_of!(Delta<T>, z) //~ ERROR the size for values of type
}
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