Struct WfCheckingCtxt

pub(super) struct WfCheckingCtxt<'a, 'tcx> {
    pub(super) ocx: ObligationCtxt<'a, 'tcx, FulfillmentError<'tcx>>,
    span: Span,
    body_def_id: LocalDefId,
    param_env: ParamEnv<'tcx>,
}

Fields

ocx: ObligationCtxt<'a, 'tcx, FulfillmentError<'tcx>>

span: Span

body_def_id: LocalDefId

param_env: ParamEnv<'tcx>

Implementations

impl<'tcx> WfCheckingCtxt<'_, 'tcx>

fn tcx(&self) -> TyCtxt<'tcx>

fn normalize<T>(&self, span: Span, loc: Option<WellFormedLoc>, value: T) -> T

where T: TypeFoldable<TyCtxt<'tcx>>,

fn register_wf_obligation( &self, span: Span, loc: Option<WellFormedLoc>, arg: GenericArg<'tcx>, )

impl<'tcx> WfCheckingCtxt<'_, 'tcx>

fn check_false_global_bounds(&mut self)

Feature gates RFC 2056 – trivial bounds, checking for global bounds that aren’t true.

Methods from Deref<Target = ObligationCtxt<'a, 'tcx, FulfillmentError<'tcx>>>

pub fn register_obligation(&self, obligation: Obligation<'tcx, Predicate<'tcx>>)

pub fn register_obligations( &self, obligations: impl IntoIterator<Item = Obligation<'tcx, Predicate<'tcx>>>, )

pub fn register_infer_ok_obligations<T>(&self, infer_ok: InferOk<'tcx, T>) -> T

pub fn register_bound( &self, cause: ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, ty: Ty<'tcx>, def_id: DefId, )

Requires that ty must implement the trait with def_id in the given environment. This trait must not have any type parameters (except for Self).

pub fn normalize<T>( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, value: T, ) -> T

where T: TypeFoldable<TyCtxt<'tcx>>,

pub fn eq<T>( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, expected: T, actual: T, ) -> Result<(), TypeError<TyCtxt<'tcx>>>

where T: ToTrace<'tcx>,

pub fn eq_trace<T>( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, trace: TypeTrace<'tcx>, expected: T, actual: T, ) -> Result<(), TypeError<TyCtxt<'tcx>>>

where T: Relate<TyCtxt<'tcx>>,

pub fn sub<T>( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, expected: T, actual: T, ) -> Result<(), TypeError<TyCtxt<'tcx>>>

where T: ToTrace<'tcx>,

Checks whether expected is a subtype of actual: expected <: actual.

pub fn relate<T>( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, variance: Variance, expected: T, actual: T, ) -> Result<(), TypeError<TyCtxt<'tcx>>>

where T: ToTrace<'tcx>,

pub fn sup<T>( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, expected: T, actual: T, ) -> Result<(), TypeError<TyCtxt<'tcx>>>

where T: ToTrace<'tcx>,

Checks whether expected is a supertype of actual: expected :> actual.

pub fn select_where_possible(&self) -> Vec<E>

pub fn select_all_or_error(&self) -> Vec<E>

pub fn assumed_wf_types_and_report_errors( &self, param_env: ParamEnv<'tcx>, def_id: LocalDefId, ) -> Result<IndexSet<Ty<'tcx>, BuildHasherDefault<FxHasher>>, ErrorGuaranteed>

pub fn make_canonicalized_query_response<T>( &self, inference_vars: CanonicalVarValues<TyCtxt<'tcx>>, answer: T, ) -> Result<&'tcx Canonical<TyCtxt<'tcx>, QueryResponse<'tcx, T>>, NoSolution>

where T: Debug + TypeFoldable<TyCtxt<'tcx>>, Canonical<TyCtxt<'tcx>, QueryResponse<'tcx, T>>: ArenaAllocatable<'tcx>,

pub fn assumed_wf_types( &self, param_env: ParamEnv<'tcx>, def_id: LocalDefId, ) -> Result<IndexSet<Ty<'tcx>, BuildHasherDefault<FxHasher>>, Vec<E>>

pub fn deeply_normalize<T>( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, value: T, ) -> Result<T, Vec<E>>

where T: TypeFoldable<TyCtxt<'tcx>>,

pub fn structurally_normalize( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, value: Ty<'tcx>, ) -> Result<Ty<'tcx>, Vec<E>>

pub fn structurally_normalize_const( &self, cause: &ObligationCause<'tcx>, param_env: ParamEnv<'tcx>, value: Const<'tcx>, ) -> Result<Const<'tcx>, Vec<E>>

Trait Implementations

impl<'a, 'tcx> Deref for WfCheckingCtxt<'a, 'tcx>

type Target = ObligationCtxt<'a, 'tcx, FulfillmentError<'tcx>>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

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: 56 bytes