Struct Predicate

pub struct Predicate<'db>(/* private fields */);

Implementations

impl Predicate<'static>

pub fn ingredient<Db>(db: &Db) -> &IngredientImpl<Self>

where Db: ?Sized + Database,

impl<'db> Predicate<'db>

pub fn new_<Db_, T0: Lookup<InternedWrapperNoDebug<WithCachedTypeInfo<Binder<'db, PredicateKind<'db>>>>> + Hash>( db: &'db Db_, kind_: T0, ) -> Self

where Db_: ?Sized + Database, InternedWrapperNoDebug<WithCachedTypeInfo<Binder<'db, PredicateKind<'db>>>>: HashEqLike<T0>,

pub fn default_debug_fmt(this: Self, f: &mut Formatter<'_>) -> Result

Default debug formatting for this struct (may be useful if you define your own Debug impl)

impl<'db> Predicate<'db>

pub fn new( interner: DbInterner<'db>, kind: Binder<'db, PredicateKind<'db>>, ) -> Self

pub fn inner(&self) -> &WithCachedTypeInfo<Binder<'db, PredicateKind<'db>>>

pub fn flip_polarity(self) -> Option<Predicate<'db>>

Flips the polarity of a Predicate.

Given T: Trait predicate it returns T: !Trait and given T: !Trait returns T: Trait.

pub fn as_trait_clause(self) -> Option<PolyTraitPredicate<'db>>

impl<'db> Predicate<'db>

pub fn expect_clause(self) -> Clause<'db>

Assert that the predicate is a clause.

Trait Implementations

impl<'db> AsId for Predicate<'db>

fn as_id(&self) -> Id

impl<'db> ChalkToNextSolver<'db, Predicate<'db>> for Goal<Interner>

fn to_nextsolver(&self, interner: DbInterner<'db>) -> Predicate<'db>

impl<'db> Clone for Predicate<'db>

fn clone(&self) -> Predicate<'db>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Configuration for Predicate<'static>

const LOCATION: Location

const DEBUG_NAME: &'static str = "Predicate"

type Fields<'a> = (InternedWrapperNoDebug<WithCachedTypeInfo<Binder<DbInterner<'a>, PredicateKind<DbInterner<'a>>>>>,)

The fields of the struct being interned.

type Struct<'db> = Predicate<'db>

The end user struct

const REVISIONS: NonZero<usize> = _

impl<'db> Debug for Predicate<'db>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'db> Elaboratable<DbInterner<'db>> for Predicate<'db>

fn predicate(&self) -> <DbInterner<'db> as Interner>::Predicate

fn child(&self, clause: <DbInterner<'db> as Interner>::Clause) -> Self

fn child_with_derived_cause( &self, clause: <DbInterner<'db> as Interner>::Clause, _span: <DbInterner<'db> as Interner>::Span, _parent_trait_pred: Binder<DbInterner<'db>, TraitPredicate<DbInterner<'db>>>, _index: usize, ) -> Self

impl<'db> Flags for Predicate<'db>

fn flags(&self) -> TypeFlags

fn outer_exclusive_binder(&self) -> DebruijnIndex

impl<'db> FromId for Predicate<'db>

fn from_id(id: Id) -> Self

impl<'db> Hash for Predicate<'db>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'db> IntoKind for Predicate<'db>

type Kind = Binder<DbInterner<'db>, PredicateKind<DbInterner<'db>>>

fn kind(self) -> Self::Kind

impl<'db> PartialEq for Predicate<'db>

fn eq(&self, other: &Predicate<'db>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'db> Predicate<DbInterner<'db>> for Predicate<'db>

fn allow_normalization(self) -> bool

Whether this projection can be soundly normalized.

Wf predicates must not be normalized, as normalization can remove required bounds which would cause us to unsoundly accept some programs. See #91068.

fn as_clause(self) -> Option<<DbInterner<'db> as Interner>::Clause>

fn as_normalizes_to(self) -> Option<Binder<I, NormalizesTo<I>>>

impl<'db> SalsaStructInDb for Predicate<'db>

type MemoIngredientMap = MemoIngredientSingletonIndex

fn lookup_or_create_ingredient_index(aux: &Zalsa) -> IngredientIndices

Lookup or create ingredient indices.

fn cast(id: Id, type_id: TypeId) -> Option<Self>

Plumbing to support nested salsa supertypes.

impl<'db> TypeFoldable<DbInterner<'db>> for Predicate<'db>

fn try_fold_with<F: FallibleTypeFolder<DbInterner<'db>>>( self, folder: &mut F, ) -> Result<Self, F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F: TypeFolder<DbInterner<'db>>>(self, folder: &mut F) -> Self

The entry point for folding. To fold a value t with a folder f call: t.fold_with(f).

impl<'db> TypeSuperFoldable<DbInterner<'db>> for Predicate<'db>

fn try_super_fold_with<F: FallibleTypeFolder<DbInterner<'db>>>( self, folder: &mut F, ) -> Result<Self, F::Error>

Provides a default fold for a recursive type of interest. This should only be called within TypeFolder methods, when a non-custom traversal is desired for the value of the type of interest passed to that method. For example, in MyFolder::try_fold_ty(ty), it is valid to call ty.try_super_fold_with(self), but any other folding should be done with xyz.try_fold_with(self).

fn super_fold_with<F: TypeFolder<DbInterner<'db>>>(self, folder: &mut F) -> Self

A convenient alternative to try_super_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_super_fold_with.

impl<'db> TypeSuperVisitable<DbInterner<'db>> for Predicate<'db>

fn super_visit_with<V: TypeVisitor<DbInterner<'db>>>( &self, visitor: &mut V, ) -> V::Result

Provides a default visit for a recursive type of interest. This should only be called within TypeVisitor methods, when a non-custom traversal is desired for the value of the type of interest passed to that method. For example, in MyVisitor::visit_ty(ty), it is valid to call ty.super_visit_with(self), but any other visiting should be done with xyz.visit_with(self).

impl<'db> TypeVisitable<DbInterner<'db>> for Predicate<'db>

fn visit_with<V: TypeVisitor<DbInterner<'db>>>( &self, visitor: &mut V, ) -> V::Result

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

impl<'db> UpcastFrom<DbInterner<'db>, Binder<DbInterner<'db>, ClauseKind<DbInterner<'db>>>> for Predicate<'db>

fn upcast_from( from: Binder<DbInterner<'db>, ClauseKind<DbInterner<'db>>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, Binder<DbInterner<'db>, PredicateKind<DbInterner<'db>>>> for Predicate<'db>

fn upcast_from( from: Binder<DbInterner<'db>, PredicateKind<DbInterner<'db>>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, Binder<DbInterner<'db>, ProjectionPredicate<DbInterner<'db>>>> for Predicate<'db>

fn upcast_from( from: Binder<'db, ProjectionPredicate<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, Binder<DbInterner<'db>, TraitPredicate<DbInterner<'db>>>> for Predicate<'db>

fn upcast_from( from: Binder<'db, TraitPredicate<DbInterner<'db>>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, Binder<DbInterner<'db>, TraitRef<DbInterner<'db>>>> for Predicate<'db>

fn upcast_from( from: Binder<DbInterner<'db>, TraitRef<DbInterner<'db>>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, Clause<'db>> for Predicate<'db>

fn upcast_from(from: Clause<'db>, _interner: DbInterner<'db>) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, ClauseKind<DbInterner<'db>>> for Predicate<'db>

fn upcast_from( from: ClauseKind<DbInterner<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, NormalizesTo<DbInterner<'db>>> for Predicate<'db>

fn upcast_from( from: NormalizesTo<DbInterner<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, OutlivesPredicate<DbInterner<'db>, Region<'db>>> for Predicate<'db>

fn upcast_from( from: OutlivesPredicate<DbInterner<'db>, Region<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, OutlivesPredicate<DbInterner<'db>, Ty<'db>>> for Predicate<'db>

fn upcast_from( from: OutlivesPredicate<DbInterner<'db>, Ty<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, PredicateKind<DbInterner<'db>>> for Predicate<'db>

fn upcast_from( from: PredicateKind<DbInterner<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, ProjectionPredicate<DbInterner<'db>>> for Predicate<'db>

fn upcast_from( from: ProjectionPredicate<'db>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, TraitPredicate<DbInterner<'db>>> for Predicate<'db>

fn upcast_from( from: TraitPredicate<DbInterner<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> UpcastFrom<DbInterner<'db>, TraitRef<DbInterner<'db>>> for Predicate<'db>

fn upcast_from( from: TraitRef<DbInterner<'db>>, interner: DbInterner<'db>, ) -> Self

impl<'db> Update for Predicate<'db>

unsafe fn maybe_update(old_pointer: *mut Self, new_value: Self) -> bool

Returns

impl<'db> Copy for Predicate<'db>

impl<'db> Eq for Predicate<'db>

impl<'db> Send for Predicate<'db>

impl<'db> StructuralPartialEq for Predicate<'db>

impl<'db> Sync for Predicate<'db>