Struct InferOk

Source

pub struct InferOk<'tcx, T> {
    pub value: T,
    pub obligations: PredicateObligations<'tcx>,
}

Expand description

InferOk<'tcx, ()> is used a lot. It may seem like a useless wrapper around PredicateObligations<'tcx>, but it has one important property: because InferOk is marked with #[must_use], if you have a method InferCtxt::f that returns InferResult<'tcx, ()> and you call it with infcx.f()?; you’ll get a warning about the obligations being discarded without use, which is probably unintentional and has been a source of bugs in the past.

Fields§

§value: T§obligations: PredicateObligations<'tcx>

Struct InferOkCopy item path

Fields§

Implementations§

impl<'tcx, T> InferOk<'tcx, T>

pub fn into_value_registering_obligations<E: 'tcx>( self, infcx: &InferCtxt<'tcx>, fulfill_cx: &mut dyn TraitEngine<'tcx, E>, ) -> T

impl<'tcx> InferOk<'tcx, ()>

pub fn into_obligations(self) -> PredicateObligations<'tcx>

Trait Implementations§

impl<'tcx, T: Debug> Debug for InferOk<'tcx, T>

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

Auto Trait Implementations§

impl<'tcx, T> DynSend for InferOk<'tcx, T>where T: DynSend,

impl<'tcx, T> DynSync for InferOk<'tcx, T>where T: DynSync,

impl<'tcx, T> Freeze for InferOk<'tcx, T>where T: Freeze,

impl<'tcx, T> !RefUnwindSafe for InferOk<'tcx, T>

impl<'tcx, T> Send for InferOk<'tcx, T>where T: Send,

impl<'tcx, T> Sync for InferOk<'tcx, T>where T: Sync,

impl<'tcx, T> Unpin for InferOk<'tcx, T>where T: Unpin,

impl<'tcx, T> !UnwindSafe for InferOk<'tcx, T>

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<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<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

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<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<I, T, U> Upcast<I, U> for Twhere U: UpcastFrom<I, T>,

fn upcast(self, interner: I) -> U

impl<I, T> UpcastFrom<I, T> for T

fn upcast_from(from: T, _tcx: I) -> T

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>,

fn with_current_subscriber(self) -> WithDispatch<Self>

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

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

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

Layout§

Struct InferOk

impl<'tcx, T> DynSend for InferOk<'tcx, T>
where T: DynSend,

impl<'tcx, T> DynSync for InferOk<'tcx, T>
where T: DynSync,

impl<'tcx, T> Freeze for InferOk<'tcx, T>
where T: Freeze,

impl<'tcx, T> Send for InferOk<'tcx, T>
where T: Send,

impl<'tcx, T> Sync for InferOk<'tcx, T>
where T: Sync,

impl<'tcx, T> Unpin for InferOk<'tcx, T>
where T: Unpin,

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

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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

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

impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, 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,