Struct rustc_middle::ty::context::GeneratorInteriorTypeCause

pub struct GeneratorInteriorTypeCause<'tcx> {
    pub ty: Ty<'tcx>,
    pub span: Span,
    pub scope_span: Option<Span>,
    pub yield_span: Span,
    pub expr: Option<HirId>,
}

Whenever a value may be live across a generator yield, the type of that value winds up in the GeneratorInteriorTypeCause struct. This struct adds additional information about such captured types that can be useful for diagnostics. In particular, it stores the span that caused a given type to be recorded, along with the scope that enclosed the value (which can be used to find the await that the value is live across).

For example:

async move {
    let x: T = expr;
    foo.await
    ...
}

Here, we would store the type T, the span of the value x, the “scope-span” for the scope that contains x, the expr T evaluated from, and the span of foo.await.

Fields

ty: Ty<'tcx>

Type of the captured binding.

span: Span

Span of the binding that was captured.

scope_span: Option<Span>

Span of the scope of the captured binding.

yield_span: Span

Span of .await or yield expression.

expr: Option<HirId>

Expr which the type evaluated from.

Trait Implementations

impl<'tcx> Clone for GeneratorInteriorTypeCause<'tcx>

fn clone(&self) -> GeneratorInteriorTypeCause<'tcx>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Debug for GeneratorInteriorTypeCause<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for GeneratorInteriorTypeCause<'tcx>

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for GeneratorInteriorTypeCause<'tcx>

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<'tcx> Hash for GeneratorInteriorTypeCause<'tcx>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for GeneratorInteriorTypeCause<'tcx>

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<'tcx> PartialEq<GeneratorInteriorTypeCause<'tcx>> for GeneratorInteriorTypeCause<'tcx>

fn eq(&self, other: &GeneratorInteriorTypeCause<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &GeneratorInteriorTypeCause<'tcx>) -> bool

This method tests for !=.

impl<'tcx> TypeFoldable<'tcx> for GeneratorInteriorTypeCause<'tcx>

fn super_fold_with<__F: TypeFolder<'tcx>>(self, __folder: &mut __F) -> Self

fn super_visit_with<__F: TypeVisitor<'tcx>>(
    &self,
    __folder: &mut __F
) -> ControlFlow<__F::BreakTy>

fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self

fn visit_with<V: TypeVisitor<'tcx>>(
    &self,
    visitor: &mut V
) -> ControlFlow<V::BreakTy>

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free.

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this self has any regions that escape binder (and hence are not bound by it).

fn has_escaping_bound_vars(&self) -> bool

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_projections(&self) -> bool

fn has_opaque_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types_or_consts(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_infer_types_or_consts(&self) -> bool

fn needs_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn needs_subst(&self) -> bool

fn has_free_regions(&self) -> bool

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

fn is_global(&self) -> bool

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching.

fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.

impl<'tcx> Eq for GeneratorInteriorTypeCause<'tcx>

impl<'tcx> StructuralEq for GeneratorInteriorTypeCause<'tcx>

impl<'tcx> StructuralPartialEq for GeneratorInteriorTypeCause<'tcx>