Type Alias Selection

pub type Selection<'tcx> = ImplSource<'tcx, PredicateObligation<'tcx>>;

Aliased Type

enum Selection<'tcx> {
    UserDefined(ImplSourceUserDefinedData<'tcx, Obligation<'tcx, Predicate<'tcx>>>),
    Param(ThinVec<Obligation<'tcx, Predicate<'tcx>>>),
    Builtin(BuiltinImplSource, ThinVec<Obligation<'tcx, Predicate<'tcx>>>),
}

Variants

UserDefined(ImplSourceUserDefinedData<'tcx, Obligation<'tcx, Predicate<'tcx>>>)

ImplSource identifying a particular impl.

Param(ThinVec<Obligation<'tcx, Predicate<'tcx>>>)

Successful resolution to an obligation provided by the caller for some type parameter. The Vec<N> represents the obligations incurred from normalizing the where-clause (if any).

Builtin(BuiltinImplSource, ThinVec<Obligation<'tcx, Predicate<'tcx>>>)

Successful resolution for a builtin impl.

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:

• UserDefined: 24 bytes
• Param: 8 bytes
• Builtin: 24 bytes

Implementations

impl<'tcx, N> ImplSource<'tcx, N>

pub fn nested_obligations(self) -> ThinVec<N>

pub fn borrow_nested_obligations(&self) -> &[N]

pub fn borrow_nested_obligations_mut(&mut self) -> &mut [N]

pub fn map<M, F>(self, f: F) -> ImplSource<'tcx, M>

where F: FnMut(N) -> M,

Trait Implementations

impl<'tcx, N> Clone for ImplSource<'tcx, N>

where N: Clone,

fn clone(&self) -> ImplSource<'tcx, N>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx, N> Debug for ImplSource<'tcx, N>

where N: Debug,

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

Formats the value using the given formatter.

impl<'tcx, N, __D> Decodable<__D> for ImplSource<'tcx, N>

where __D: TyDecoder<I = TyCtxt<'tcx>>, ImplSourceUserDefinedData<'tcx, N>: Decodable<__D>, ThinVec<N>: Decodable<__D>,

fn decode(__decoder: &mut __D) -> ImplSource<'tcx, N>

impl<'tcx, N, __E> Encodable<__E> for ImplSource<'tcx, N>

where __E: TyEncoder<I = TyCtxt<'tcx>>, ImplSourceUserDefinedData<'tcx, N>: Encodable<__E>, ThinVec<N>: Encodable<__E>,

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

impl<'tcx, '__ctx, N> HashStable<StableHashingContext<'__ctx>> for ImplSource<'tcx, N>

where N: HashStable<StableHashingContext<'__ctx>>,

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher<SipHasher128>, )

impl<'tcx, N> PartialEq for ImplSource<'tcx, N>

where N: PartialEq,

fn eq(&self, other: &ImplSource<'tcx, N>) -> 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<'tcx, N> TypeFoldable<TyCtxt<'tcx>> for ImplSource<'tcx, N>

where N: TypeFoldable<TyCtxt<'tcx>>,

fn try_fold_with<__F>( self, __folder: &mut __F, ) -> Result<ImplSource<'tcx, N>, <__F as FallibleTypeFolder<TyCtxt<'tcx>>>::Error>

where __F: FallibleTypeFolder<TyCtxt<'tcx>>,

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) -> Self

where 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, N> TypeVisitable<TyCtxt<'tcx>> for ImplSource<'tcx, N>

where N: TypeVisitable<TyCtxt<'tcx>>,

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

where __V: TypeVisitor<TyCtxt<'tcx>>,

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

impl<'tcx, N> Eq for ImplSource<'tcx, N>

where N: Eq,

impl<'tcx, N> StructuralPartialEq for ImplSource<'tcx, N>