pub struct InferOk<'tcx, T> {
pub value: T,
pub obligations: Vec<PredicateObligation<'tcx>>,
}
Expand description
InferOk<'tcx, ()>
is used a lot. It may seem like a useless wrapper
around Vec<PredicateObligation<'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: Vec<PredicateObligation<'tcx>>
Implementations§
source§impl<'tcx, T> InferOk<'tcx, T>
impl<'tcx, T> InferOk<'tcx, T>
sourcepub fn into_value_registering_obligations<E: 'tcx>(
self,
infcx: &InferCtxt<'tcx>,
fulfill_cx: &mut dyn TraitEngine<'tcx, E>,
) -> T
pub fn into_value_registering_obligations<E: 'tcx>( self, infcx: &InferCtxt<'tcx>, fulfill_cx: &mut dyn TraitEngine<'tcx, E>, ) -> T
Extracts value
, registering any obligations into fulfill_cx
.
source§impl<'tcx> InferOk<'tcx, ()>
impl<'tcx> InferOk<'tcx, ()>
pub fn into_obligations(self) -> Vec<PredicateObligation<'tcx>>
Trait Implementations§
Auto Trait Implementations§
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>
impl<'tcx, T> !Sync for InferOk<'tcx, T>
impl<'tcx, T> Unpin for InferOk<'tcx, T>where
T: Unpin,
impl<'tcx, T> !UnwindSafe for InferOk<'tcx, T>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
Creates a filterable data provider with the given name for debugging. Read more
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
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 T
Layout§
Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.