55 lines
1.4 KiB
Rust
55 lines
1.4 KiB
Rust
//@ normalize-stderr-test: "pref: Align\([1-8] bytes\)" -> "pref: $$PREF_ALIGN"
|
|
#![crate_type = "lib"]
|
|
#![feature(rustc_attrs)]
|
|
|
|
use std::mem::MaybeUninit;
|
|
|
|
enum HasNiche {
|
|
A,
|
|
B,
|
|
C,
|
|
}
|
|
|
|
// This should result in ScalarPair(Initialized, Union),
|
|
// since the u8 payload will be uninit for `None`.
|
|
#[rustc_layout(debug)]
|
|
pub enum MissingPayloadField { //~ ERROR: layout_of
|
|
Some(u8),
|
|
None
|
|
}
|
|
|
|
// This should result in ScalarPair(Initialized, Initialized),
|
|
// since the u8 field is present in all variants,
|
|
// and hence will always be initialized.
|
|
#[rustc_layout(debug)]
|
|
pub enum CommonPayloadField { //~ ERROR: layout_of
|
|
A(u8),
|
|
B(u8),
|
|
}
|
|
|
|
// This should result in ScalarPair(Initialized, Union),
|
|
// since, though a u8-sized field is present in all variants, it might be uninit.
|
|
#[rustc_layout(debug)]
|
|
pub enum CommonPayloadFieldIsMaybeUninit { //~ ERROR: layout_of
|
|
A(u8),
|
|
B(MaybeUninit<u8>),
|
|
}
|
|
|
|
// This should result in ScalarPair(Initialized, Union),
|
|
// since only the niche field (used for the tag) is guaranteed to be initialized.
|
|
#[rustc_layout(debug)]
|
|
pub enum NicheFirst { //~ ERROR: layout_of
|
|
A(HasNiche, u8),
|
|
B,
|
|
C
|
|
}
|
|
|
|
// This should result in ScalarPair(Union, Initialized),
|
|
// since only the niche field (used for the tag) is guaranteed to be initialized.
|
|
#[rustc_layout(debug)]
|
|
pub enum NicheSecond { //~ ERROR: layout_of
|
|
A(u8, HasNiche),
|
|
B,
|
|
C,
|
|
}
|