pub struct InferCtxtBuilder<'tcx> {
tcx: TyCtxt<'tcx>,
defining_opaque_types: &'tcx RawList<(), LocalDefId>,
considering_regions: bool,
skip_leak_check: bool,
intercrate: bool,
next_trait_solver: bool,
}
Expand description
Used to configure inference contexts before their creation.
Fields§
§tcx: TyCtxt<'tcx>
§defining_opaque_types: &'tcx RawList<(), LocalDefId>
§considering_regions: bool
§skip_leak_check: bool
§intercrate: bool
§next_trait_solver: bool
Implementations§
source§impl<'tcx> InferCtxtBuilder<'tcx>
impl<'tcx> InferCtxtBuilder<'tcx>
sourcepub fn with_opaque_type_inference(
self,
defining_anchor: LocalDefId,
) -> InferCtxtBuilder<'tcx>
pub fn with_opaque_type_inference( self, defining_anchor: LocalDefId, ) -> InferCtxtBuilder<'tcx>
Whenever the InferCtxt
should be able to handle defining uses of opaque types,
you need to call this function. Otherwise the opaque type will be treated opaquely.
It is only meant to be called in two places, for typeck
(via Inherited::build
) and for the inference context used
in mir borrowck.
pub fn with_next_trait_solver( self, next_trait_solver: bool, ) -> InferCtxtBuilder<'tcx>
pub fn intercrate(self, intercrate: bool) -> InferCtxtBuilder<'tcx>
pub fn ignoring_regions(self) -> InferCtxtBuilder<'tcx>
pub fn skip_leak_check(self, skip_leak_check: bool) -> InferCtxtBuilder<'tcx>
sourcepub fn build_with_canonical<T>(
self,
span: Span,
canonical: &Canonical<TyCtxt<'tcx>, T>,
) -> (InferCtxt<'tcx>, T, CanonicalVarValues<TyCtxt<'tcx>>)where
T: TypeFoldable<TyCtxt<'tcx>>,
pub fn build_with_canonical<T>(
self,
span: Span,
canonical: &Canonical<TyCtxt<'tcx>, T>,
) -> (InferCtxt<'tcx>, T, CanonicalVarValues<TyCtxt<'tcx>>)where
T: TypeFoldable<TyCtxt<'tcx>>,
Given a canonical value C
as a starting point, create an
inference context that contains each of the bound values
within instantiated as a fresh variable. The f
closure is
invoked with the new infcx, along with the instantiated value
V
and a instantiation S
. This instantiation S
maps from
the bound values in C
to their instantiated values in V
(in other words, S(C) = V
).
pub fn build(&mut self) -> InferCtxt<'tcx>
Trait Implementations§
source§impl<'tcx> InferCtxtBuilderExt<'tcx> for InferCtxtBuilder<'tcx>
impl<'tcx> InferCtxtBuilderExt<'tcx> for InferCtxtBuilder<'tcx>
source§fn enter_canonical_trait_query<K, R>(
self,
canonical_key: &Canonical<'tcx, K>,
operation: impl FnOnce(&ObligationCtxt<'_, 'tcx>, K) -> Result<R, NoSolution>,
) -> Result<CanonicalQueryResponse<'tcx, R>, NoSolution>where
K: TypeFoldable<TyCtxt<'tcx>>,
R: Debug + TypeFoldable<TyCtxt<'tcx>>,
Canonical<'tcx, QueryResponse<'tcx, R>>: ArenaAllocatable<'tcx>,
fn enter_canonical_trait_query<K, R>(
self,
canonical_key: &Canonical<'tcx, K>,
operation: impl FnOnce(&ObligationCtxt<'_, 'tcx>, K) -> Result<R, NoSolution>,
) -> Result<CanonicalQueryResponse<'tcx, R>, NoSolution>where
K: TypeFoldable<TyCtxt<'tcx>>,
R: Debug + TypeFoldable<TyCtxt<'tcx>>,
Canonical<'tcx, QueryResponse<'tcx, R>>: ArenaAllocatable<'tcx>,
The “main method” for a canonicalized trait query. Given the
canonical key canonical_key
, this method will create a new
inference context, instantiate the key, and run your operation
op
. The operation should yield up a result (of type R
) as
well as a set of trait obligations that must be fully
satisfied. These obligations will be processed and the
canonical result created.
Returns NoSolution
in the event of any error.
(It might be mildly nicer to implement this on TyCtxt
, and
not InferCtxtBuilder
, but that is a bit tricky right now.
In part because we would need a for<'tcx>
sort of
bound for the closure and in part because it is convenient to
have 'tcx
be free on this function so that we can talk about
K: TypeFoldable<TyCtxt<'tcx>>
.)
Auto Trait Implementations§
impl<'tcx> Freeze for InferCtxtBuilder<'tcx>
impl<'tcx> !RefUnwindSafe for InferCtxtBuilder<'tcx>
impl<'tcx> !Send for InferCtxtBuilder<'tcx>
impl<'tcx> !Sync for InferCtxtBuilder<'tcx>
impl<'tcx> Unpin for InferCtxtBuilder<'tcx>
impl<'tcx> !UnwindSafe for InferCtxtBuilder<'tcx>
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
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>
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>
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>
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: 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: 24 bytes