Enum rustc_middle::ty::ClauseKind

pub enum ClauseKind<'tcx> {
    Trait(TraitPredicate<'tcx>),
    RegionOutlives(RegionOutlivesPredicate<'tcx>),
    TypeOutlives(TypeOutlivesPredicate<'tcx>),
    Projection(ProjectionPredicate<'tcx>),
    ConstArgHasType(Const<'tcx>, Ty<'tcx>),
    WellFormed(GenericArg<'tcx>),
    ConstEvaluatable(Const<'tcx>),
}

A clause is something that can appear in where bounds or be inferred by implied bounds.

Variants

Trait(TraitPredicate<'tcx>)

Corresponds to where Foo: Bar<A, B, C>. Foo here would be the Self type of the trait reference and A, B, and C would be the type parameters.

RegionOutlives(RegionOutlivesPredicate<'tcx>)

where 'a: 'b

TypeOutlives(TypeOutlivesPredicate<'tcx>)

where T: 'a

Projection(ProjectionPredicate<'tcx>)

where <T as TraitRef>::Name == X, approximately. See the ProjectionPredicate struct for details.

ConstArgHasType(Const<'tcx>, Ty<'tcx>)

Ensures that a const generic argument to a parameter const N: u8 is of type u8.

WellFormed(GenericArg<'tcx>)

No syntax: T well-formed.

ConstEvaluatable(Const<'tcx>)

Constant initializer must evaluate successfully.

Trait Implementations

impl<'tcx> Clone for ClauseKind<'tcx>

fn clone(&self) -> ClauseKind<'tcx>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for ClauseKind<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for ClauseKind<'tcx>

fn decode(__decoder: &mut __D) -> Self

impl<'tcx> Display for ClauseKind<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for ClauseKind<'tcx>

fn encode(&self, __encoder: &mut __E)

impl<'tcx> EraseType for ClauseKind<'tcx>

type Result = [u8; 32]

impl<'tcx> Hash for ClauseKind<'tcx>

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<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for ClauseKind<'tcx>

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher )

impl<'tcx, '__lifted> Lift<'__lifted> for ClauseKind<'tcx>

type Lifted = ClauseKind<'__lifted>

fn lift_to_tcx(self, __tcx: TyCtxt<'__lifted>) -> Option<ClauseKind<'__lifted>>

impl ParameterizedOverTcx for ClauseKind<'static>

type Value<'tcx> = ClauseKind<'tcx>

impl<'tcx> PartialEq<ClauseKind<'tcx>> for ClauseKind<'tcx>

fn eq(&self, other: &ClauseKind<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl<'tcx, P: PrettyPrinter<'tcx>> Print<'tcx, P> for ClauseKind<'tcx>

type Output = P

type Error = Error

fn print(&self, cx: P) -> Result<Self::Output, Self::Error>

impl<'tcx> ToPredicate<'tcx, Clause<'tcx>> for ClauseKind<'tcx>

fn to_predicate(self, tcx: TyCtxt<'tcx>) -> Clause<'tcx>

impl<'tcx> ToPredicate<'tcx, Predicate<'tcx>> for ClauseKind<'tcx>

fn to_predicate(self, tcx: TyCtxt<'tcx>) -> Predicate<'tcx>

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ClauseKind<'tcx>

fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( 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>(self, folder: &mut F) -> Selfwhere F: TypeFolder<I>,

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

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ClauseKind<'tcx>

fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V ) -> ControlFlow<__V::BreakTy>

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

impl<'tcx> Copy for ClauseKind<'tcx>

impl<'tcx> Eq for ClauseKind<'tcx>

impl<'tcx> StructuralEq for ClauseKind<'tcx>

impl<'tcx> StructuralPartialEq for ClauseKind<'tcx>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

• Trait: 24 bytes
• RegionOutlives: 16 bytes
• TypeOutlives: 16 bytes
• Projection: 24 bytes
• ConstArgHasType: 16 bytes
• WellFormed: 8 bytes
• ConstEvaluatable: 8 bytes