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>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

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

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

Formats the value using the given formatter.

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

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

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

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

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

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

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

Feeds this value into the given Hasher.

pub 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>

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

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

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

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

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

This method tests for !=.

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

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

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

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

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

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

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

pub 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.

pub 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).

pub fn has_escaping_bound_vars(&self) -> bool

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

pub fn has_projections(&self) -> bool

pub fn has_opaque_types(&self) -> bool

pub fn references_error(&self) -> bool

pub fn has_param_types_or_consts(&self) -> bool

pub fn has_infer_regions(&self) -> bool

pub fn has_infer_types(&self) -> bool

pub fn has_infer_types_or_consts(&self) -> bool

pub fn needs_infer(&self) -> bool

pub fn has_placeholders(&self) -> bool

pub fn needs_subst(&self) -> bool

pub 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.

pub fn has_erased_regions(&self) -> bool

pub fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

pub 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.

pub fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

pub 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.