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simplify and future-proof `needs_normalization`

This commit is contained in:
lcnr 2024-07-10 14:45:07 +02:00
parent 0fdfb61795
commit e00fd781c9
3 changed files with 10 additions and 13 deletions
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13
compiler/rustc_trait_selection/src/traits/normalize.rs
View File

@ -109,16 +109,13 @@ pub(super) fn needs_normalization<'tcx, T: TypeVisitable<TyCtxt<'tcx>>>(
value: &T,
reveal: Reveal,
) -> bool {
// This mirrors `ty::TypeFlags::HAS_ALIASES` except that we take `Reveal` into account.
let mut flags = ty::TypeFlags::HAS_TY_PROJECTION
| ty::TypeFlags::HAS_TY_WEAK
| ty::TypeFlags::HAS_TY_INHERENT
| ty::TypeFlags::HAS_CT_PROJECTION;
let mut flags = ty::TypeFlags::HAS_ALIAS;
// Opaques are treated as rigid with `Reveal::UserFacing`,
// so we can ignore those.
match reveal {
Reveal::UserFacing => {}
Reveal::All => flags |= ty::TypeFlags::HAS_TY_OPAQUE,
Reveal::UserFacing => flags.remove(ty::TypeFlags::HAS_TY_OPAQUE),
Reveal::All => {}
}
value.has_type_flags(flags)

8
compiler/rustc_type_ir/src/flags.rs
View File

@ -14,7 +14,7 @@ bitflags::bitflags! {
/// Does this have `ConstKind::Param`?
const HAS_CT_PARAM = 1 << 2;
const HAS_PARAM = TypeFlags::HAS_TY_PARAM.bits()
const HAS_PARAM = TypeFlags::HAS_TY_PARAM.bits()
| TypeFlags::HAS_RE_PARAM.bits()
| TypeFlags::HAS_CT_PARAM.bits();
@ -27,7 +27,7 @@ bitflags::bitflags! {
/// Does this have inference variables? Used to determine whether
/// inference is required.
const HAS_INFER = TypeFlags::HAS_TY_INFER.bits()
const HAS_INFER = TypeFlags::HAS_TY_INFER.bits()
| TypeFlags::HAS_RE_INFER.bits()
| TypeFlags::HAS_CT_INFER.bits();
@ -39,7 +39,7 @@ bitflags::bitflags! {
const HAS_CT_PLACEHOLDER = 1 << 8;
/// Does this have placeholders?
const HAS_PLACEHOLDER = TypeFlags::HAS_TY_PLACEHOLDER.bits()
const HAS_PLACEHOLDER = TypeFlags::HAS_TY_PLACEHOLDER.bits()
| TypeFlags::HAS_RE_PLACEHOLDER.bits()
| TypeFlags::HAS_CT_PLACEHOLDER.bits();
@ -81,7 +81,7 @@ bitflags::bitflags! {
/// Does this have `Alias` or `ConstKind::Unevaluated`?
///
/// Rephrased, could this term be normalized further?
const HAS_ALIASES = TypeFlags::HAS_TY_PROJECTION.bits()
const HAS_ALIAS = TypeFlags::HAS_TY_PROJECTION.bits()
| TypeFlags::HAS_TY_WEAK.bits()
| TypeFlags::HAS_TY_OPAQUE.bits()
| TypeFlags::HAS_TY_INHERENT.bits()

2
compiler/rustc_type_ir/src/visit.rs
View File

@ -230,7 +230,7 @@ pub trait TypeVisitableExt<I: Interner>: TypeVisitable<I> {
}
fn has_aliases(&self) -> bool {
self.has_type_flags(TypeFlags::HAS_ALIASES)
self.has_type_flags(TypeFlags::HAS_ALIAS)
}
fn has_inherent_projections(&self) -> bool {