Struct rustc_hir_typeck::inherited::Inherited

pub struct Inherited<'tcx> {
    pub(crate) infcx: InferCtxt<'tcx>,
    pub(crate) typeck_results: RefCell<TypeckResults<'tcx>>,
    pub(crate) locals: RefCell<HirIdMap<LocalTy<'tcx>>>,
    pub(crate) fulfillment_cx: RefCell<Box<dyn TraitEngine<'tcx>>>,
    pub(crate) deferred_sized_obligations: RefCell<Vec<(Ty<'tcx>, Span, ObligationCauseCode<'tcx>)>>,
    pub(crate) deferred_call_resolutions: RefCell<LocalDefIdMap<Vec<DeferredCallResolution<'tcx>>>>,
    pub(crate) deferred_cast_checks: RefCell<Vec<CastCheck<'tcx>>>,
    pub(crate) deferred_transmute_checks: RefCell<Vec<(Ty<'tcx>, Ty<'tcx>, HirId)>>,
    pub(crate) deferred_asm_checks: RefCell<Vec<(&'tcx InlineAsm<'tcx>, HirId)>>,
    pub(crate) deferred_generator_interiors: RefCell<Vec<(BodyId, Ty<'tcx>, GeneratorKind)>>,
    pub(crate) body_id: Option<BodyId>,
    pub(crate) diverging_type_vars: RefCell<FxHashSet<Ty<'tcx>>>,
}

Closures defined within the function. For example:

fn foo() {
    bar(move|| { ... })
}

Here, the function foo() and the closure passed to bar() will each have their own FnCtxt, but they will share the inherited fields.

Fields

infcx: InferCtxt<'tcx>

typeck_results: RefCell<TypeckResults<'tcx>>

locals: RefCell<HirIdMap<LocalTy<'tcx>>>

fulfillment_cx: RefCell<Box<dyn TraitEngine<'tcx>>>

deferred_sized_obligations: RefCell<Vec<(Ty<'tcx>, Span, ObligationCauseCode<'tcx>)>>

Some additional Sized obligations badly affect type inference. These obligations are added in a later stage of typeck. Removing these may also cause additional complications, see #101066.

deferred_call_resolutions: RefCell<LocalDefIdMap<Vec<DeferredCallResolution<'tcx>>>>

When we process a call like c() where c is a closure type, we may not have decided yet whether c is a Fn, FnMut, or FnOnce closure. In that case, we defer full resolution of the call until upvar inference can kick in and make the decision. We keep these deferred resolutions grouped by the def-id of the closure, so that once we decide, we can easily go back and process them.

deferred_cast_checks: RefCell<Vec<CastCheck<'tcx>>>

deferred_transmute_checks: RefCell<Vec<(Ty<'tcx>, Ty<'tcx>, HirId)>>

deferred_asm_checks: RefCell<Vec<(&'tcx InlineAsm<'tcx>, HirId)>>

deferred_generator_interiors: RefCell<Vec<(BodyId, Ty<'tcx>, GeneratorKind)>>

body_id: Option<BodyId>

diverging_type_vars: RefCell<FxHashSet<Ty<'tcx>>>

Whenever we introduce an adjustment from ! into a type variable, we record that type variable here. This is later used to inform fallback. See the fallback module for details.

Implementations

impl<'tcx> Inherited<'tcx>

pub fn build(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> InheritedBuilder<'tcx>

impl<'tcx> Inherited<'tcx>

fn new(
    infcx: InferCtxt<'tcx>,
    def_id: LocalDefId,
    typeck_results: RefCell<TypeckResults<'tcx>>
) -> Self

pub(crate) fn register_predicate(&self, obligation: PredicateObligation<'tcx>)

pub(crate) fn register_predicates<I>(&self, obligations: I)where
    I: IntoIterator<Item = PredicateObligation<'tcx>>,

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

Trait Implementations

impl<'tcx> Deref for Inherited<'tcx>

type Target = InferCtxt<'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: 1752 bytes