Struct rustc_middle::ty::trait_def::TraitDef

source ·

pub struct TraitDef {
    pub def_id: DefId,
    pub unsafety: Unsafety,
    pub paren_sugar: bool,
    pub has_auto_impl: bool,
    pub is_marker: bool,
    pub is_coinductive: bool,
    pub skip_array_during_method_dispatch: bool,
    pub specialization_kind: TraitSpecializationKind,
    pub must_implement_one_of: Option<Box<[Ident]>>,
    pub implement_via_object: bool,
    pub deny_explicit_impl: bool,
}

Expand description

A trait’s definition with type information.

Fields§

§def_id: DefId§unsafety: Unsafety§paren_sugar: bool

If true, then this trait had the #[rustc_paren_sugar] attribute, indicating that it should be used with Foo() sugar. This is a temporary thing – eventually any trait will be usable with the sugar (or without it).

§has_auto_impl: bool§is_marker: bool

If true, then this trait has the #[marker] attribute, indicating that all its associated items have defaults that cannot be overridden, and thus impls of it are allowed to overlap.

§is_coinductive: bool

If true, then this trait has to #[rustc_coinductive] attribute or is an auto trait. This indicates that trait solver cycles involving an X: ThisTrait goal are accepted.

In the future all traits should be coinductive, but we need a better formal understanding of what exactly that means and should probably also have already switched to the new trait solver.

§skip_array_during_method_dispatch: bool

If true, then this trait has the #[rustc_skip_array_during_method_dispatch] attribute, indicating that editions before 2021 should not consider this trait during method dispatch if the receiver is an array.

§specialization_kind: TraitSpecializationKind

Used to determine whether the standard library is allowed to specialize on this trait.

§must_implement_one_of: Option<Box<[Ident]>>

List of functions from #[rustc_must_implement_one_of] attribute one of which must be implemented.

§implement_via_object: bool

Whether to add a builtin dyn Trait: Trait implementation. This is enabled for all traits except ones marked with #[rustc_deny_explicit_impl(implement_via_object = false)].

§deny_explicit_impl: bool

Whether a trait is fully built-in, and any implementation is disallowed. This only applies to built-in traits, and is marked via #[rustc_deny_explicit_impl(implement_via_object = ...)].

Struct rustc_middle::ty::trait_def::TraitDef

Fields§

Implementations§

impl<'tcx> TraitDef

pub fn ancestors( &self, tcx: TyCtxt<'tcx>, of_impl: DefId ) -> Result<Ancestors<'tcx>, ErrorGuaranteed>

Trait Implementations§

impl Debug for TraitDef

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

impl<__D: SpanDecoder> Decodable<__D> for TraitDef

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

impl<__E: SpanEncoder> Encodable<__E> for TraitDef

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

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for TraitDef

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

impl ParameterizedOverTcx for TraitDef

type Value<'tcx> = TraitDef

Auto Trait Implementations§

impl DynSend for TraitDef

impl DynSync for TraitDef

impl Freeze for TraitDef

impl RefUnwindSafe for TraitDef

impl Send for TraitDef

impl Sync for TraitDef

impl Unpin for TraitDef

impl UnwindSafe for TraitDef

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment = _

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T, R> CollectAndApply<T, R> for T

fn collect_and_apply<I, F>(iter: I, f: F) -> Rwhere I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

type Output = R

impl<Tcx, T> DepNodeParams<Tcx> for Twhere Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

default fn fingerprint_style() -> FingerprintStyle

default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint

default fn to_debug_str(&self, _: Tcx) -> String

default fn recover(_: Tcx, _: &DepNode) -> Option<T>

impl<T> Filterable for T

fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

fn in_current_span(self) -> Instrumented<Self>

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<P> IntoQueryParam<P> for P

fn into_query_param(self) -> P

impl<T> MaybeResult<T> for T

type Error = !

fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

impl<T> Pointable for T

const ALIGN: usize = _

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T> Same for T

type Output = T

impl<'tcx, T> ToPredicate<'tcx, T> for T

fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

fn vzip(self) -> V

impl<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

impl<D: SpanDecoder> Decodable<D> for TraitDef

fn decode(decoder: &mut D) -> Self

impl<E: SpanEncoder> Encodable<E> for TraitDef

fn encode(&self, encoder: &mut E)

impl<'ctx> HashStable<StableHashingContext<'ctx>> for TraitDef

fn hash_stable( &self, hcx: &mut StableHashingContext<'ctx>, __hasher: &mut StableHasher )

impl<T> Any for T
where T: 'static + ?Sized,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

impl<Tcx, T> DepNodeParams<Tcx> for T
where Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

impl<T, U> Into<U> for T
where U: From<T>,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

impl<'a, T> Captures<'a> for T
where T: ?Sized,

impl<T> ErasedDestructor for T
where T: 'static,

impl<T> MaybeSendSync for T
where T: Send + Sync,