Struct rustc_borrowck::type_check::InstantiateOpaqueType

pub(crate) struct InstantiateOpaqueType<'tcx> {
    pub base_universe: Option<UniverseIndex>,
    pub region_constraints: Option<RegionConstraintData<'tcx>>,
    pub obligations: Vec<PredicateObligation<'tcx>>,
}

Runs infcx.instantiate_opaque_types. Unlike other TypeOps, this is not canonicalized - it directly affects the main InferCtxt that we use during MIR borrowchecking.

Fields

base_universe: Option<UniverseIndex>

region_constraints: Option<RegionConstraintData<'tcx>>

obligations: Vec<PredicateObligation<'tcx>>

Trait Implementations

impl<'tcx> Debug for InstantiateOpaqueType<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> ToUniverseInfo<'tcx> for InstantiateOpaqueType<'tcx>

fn to_universe_info(self, base_universe: UniverseIndex) -> UniverseInfo<'tcx>

impl<'tcx> TypeOp<'tcx> for InstantiateOpaqueType<'tcx>

type ErrorInfo = InstantiateOpaqueType<'tcx>

We use this type itself to store the information used when reporting errors. Since this is not a query, we don’t re-run anything during error reporting - we just use the information we saved to help extract an error from the already-existing region constraints in our InferCtxt

type Output = ()

fn fully_perform( self, infcx: &InferCtxt<'tcx>, span: Span ) -> Result<TypeOpOutput<'tcx, Self>, ErrorGuaranteed>

Processes the operation and all resulting obligations, returning the final result along with any region constraints (they will be given over to the NLL region solver).

impl<'tcx> TypeOpInfo<'tcx> for InstantiateOpaqueType<'tcx>

fn fallback_error( &self, tcx: TyCtxt<'tcx>, span: Span ) -> DiagnosticBuilder<'tcx, ErrorGuaranteed>

Returns an error to be reported if rerunning the type op fails to recover the error’s cause.

fn base_universe(&self) -> UniverseIndex

fn nice_error( &self, mbcx: &mut MirBorrowckCtxt<'_, 'tcx>, _cause: ObligationCause<'tcx>, placeholder_region: Region<'tcx>, error_region: Option<Region<'tcx>> ) -> Option<DiagnosticBuilder<'tcx, ErrorGuaranteed>>

fn report_error( &self, mbcx: &mut MirBorrowckCtxt<'_, 'tcx>, placeholder: PlaceholderRegion, error_element: RegionElement, cause: ObligationCause<'tcx> )

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: 104 bytes