bjoernager/rust
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make no-variant types a dedicated Variants variant

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This commit is contained in:
Ralf Jung 2024-12-01 17:33:01 +01:00
parent 21de42bf8d
commit e023590de4
53 changed files with 246 additions and 495 deletions
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8
compiler/rustc_ty_utils/src/layout/invariant.rs
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@ -242,15 +242,15 @@ pub(super) fn layout_sanity_check<'tcx>(cx: &LayoutCx<'tcx>, layout: &TyAndLayou
check_layout_abi(cx, layout);
match &layout.variants {
Variants::Single { index: None } => {
Variants::Empty => {
assert!(layout.is_uninhabited());
}
Variants::Single { index: Some(idx) } => {
Variants::Single { index } => {
if let Some(variants) = layout.ty.variant_range(tcx) {
assert!(variants.contains(idx));
assert!(variants.contains(index));
} else {
// Types without variants use `0` as dummy variant index.
assert!(idx.as_u32() == 0);
assert!(index.as_u32() == 0);
}
}
Variants::Multiple { variants, tag, tag_encoding, .. } => {