Trait ToStableHashKey

pub trait ToStableHashKey<HCX> {
    type KeyType: Ord + Sized + HashStable<HCX>;

    // Required method
    fn to_stable_hash_key(&self, hcx: &HCX) -> Self::KeyType;
}

Implement this for types that can be turned into stable keys like, for example, for DefId that can be converted to a DefPathHash. This is used for bringing maps into a predictable order before hashing them.

Required Associated Types

type KeyType: Ord + Sized + HashStable<HCX>

Required Methods

fn to_stable_hash_key(&self, hcx: &HCX) -> Self::KeyType

Implementations on Foreign Types

impl<HCX> ToStableHashKey<HCX> for String

type KeyType = String

fn to_stable_hash_key(&self, _: &HCX) -> Self::KeyType

impl<HCX, T1: ToStableHashKey<HCX>, T2: ToStableHashKey<HCX>> ToStableHashKey<HCX> for (T1, T2)

type KeyType = (<T1 as ToStableHashKey<HCX>>::KeyType, <T2 as ToStableHashKey<HCX>>::KeyType)

fn to_stable_hash_key(&self, hcx: &HCX) -> Self::KeyType

Implementors

impl<CTX: HashStableContext> ToStableHashKey<CTX> for Namespace

impl<CTX: HashStableContext> ToStableHashKey<CTX> for OwnerId

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for BodyId

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for ForeignItemId

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for ImplItemId

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for ItemId

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for TraitItemId

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for HirId

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for ItemLocalId

impl<HCX> ToStableHashKey<HCX> for LintId

impl<HCX: HashStableContext> ToStableHashKey<HCX> for LintExpectationId

impl ToStableHashKey<StableHashingContext<'_>> for MonoItem<'_>

impl ToStableHashKey<StableHashingContext<'_>> for CodegenUnit<'_>

impl<'a> ToStableHashKey<StableHashingContext<'a>> for Scope

impl<'a, 'tcx, H, T> ToStableHashKey<StableHashingContext<'a>> for &'tcx RawList<H, T>

where T: HashStable<StableHashingContext<'a>>,

impl<HCX> ToStableHashKey<HCX> for WorkProductId

impl<HCX: HashStableContext> ToStableHashKey<HCX> for OutputType

impl<CTX> ToStableHashKey<CTX> for Symbol

impl<CTX: HashStableContext> ToStableHashKey<CTX> for CrateNum

impl<CTX: HashStableContext> ToStableHashKey<CTX> for DefId

impl<CTX: HashStableContext> ToStableHashKey<CTX> for DefPathHash

impl<CTX: HashStableContext> ToStableHashKey<CTX> for LocalDefId

impl<HCX: Clone, DefId: HashStable<HCX>> ToStableHashKey<HCX> for SimplifiedType<DefId>