Arena in rustc_middle::arena - Rust
Description: API documentation for the Rust `Arena` struct in crate `rustc_middle`.

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## Arena

# Struct Arena

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    pub struct Arena<'tcx> {Show 60 fields
        pub dropless: DroplessArena,
        layout: TypedArena<LayoutData<FieldIdx, VariantIdx>>,
        proxy_coroutine_layout: TypedArena<CoroutineLayout<'tcx>>,
        fn_abi: TypedArena<FnAbi<'tcx, Ty<'tcx>>>,
        adt_def: TypedArena<AdtDefData>,
        steal_thir: TypedArena<Steal<Thir<'tcx>>>,
        steal_mir: TypedArena<Steal<Body<'tcx>>>,
        mir: TypedArena<Body<'tcx>>,
        steal_promoted: TypedArena<Steal<IndexVec<Promoted, Body<'tcx>>>>,
        promoted: TypedArena<IndexVec<Promoted, Body<'tcx>>>,
        typeck_results: TypedArena<TypeckResults<'tcx>>,
        borrowck_result: TypedArena<FxIndexMap<LocalDefId, DefinitionSiteHiddenType<'tcx>>>,
        resolver: TypedArena<Steal<(ResolverAstLowering<'tcx>, Arc<Crate>)>>,
        crate_for_resolver: TypedArena<Steal<(Crate, AttrVec)>>,
        resolutions: TypedArena<ResolverGlobalCtxt>,
        const_allocs: TypedArena<Allocation>,
        region_scope_tree: TypedArena<ScopeTree>,
        mir_keys: TypedArena<DefIdSet>,
        dropck_outlives: TypedArena<Canonical<'tcx, QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>>,
        normalize_canonicalized_projection: TypedArena<Canonical<'tcx, QueryResponse<'tcx, NormalizationResult<'tcx>>>>,
        implied_outlives_bounds: TypedArena<Canonical<'tcx, QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>>,
        dtorck_constraint: TypedArena<DropckConstraint<'tcx>>,
        candidate_step: TypedArena<CandidateStep<'tcx>>,
        autoderef_bad_ty: TypedArena<MethodAutoderefBadTy<'tcx>>,
        query_region_constraints: TypedArena<QueryRegionConstraints<'tcx>>,
        type_op_subtype: TypedArena<Canonical<'tcx, QueryResponse<'tcx, ()>>>,
        type_op_normalize_poly_fn_sig: TypedArena<Canonical<'tcx, QueryResponse<'tcx, PolyFnSig<'tcx>>>>,
        type_op_normalize_fn_sig: TypedArena<Canonical<'tcx, QueryResponse<'tcx, FnSig<'tcx>>>>,
        type_op_normalize_clause: TypedArena<Canonical<'tcx, QueryResponse<'tcx, Clause<'tcx>>>>,
        type_op_normalize_ty: TypedArena<Canonical<'tcx, QueryResponse<'tcx, Ty<'tcx>>>>,
        inspect_probe: TypedArena<Probe<TyCtxt<'tcx>>>,
        effective_visibilities: TypedArena<EffectiveVisibilities>,
        upvars_mentioned: TypedArena<FxIndexMap<HirId, Upvar>>,
        dyn_compatibility_violations: TypedArena<DynCompatibilityViolation>,
        codegen_unit: TypedArena<CodegenUnit<'tcx>>,
        attribute: TypedArena<Attribute>,
        name_set: TypedArena<UnordSet<Symbol>>,
        autodiff_item: TypedArena<AutoDiffItem>,
        ordered_name_set: TypedArena<FxIndexSet<Symbol>>,
        stable_order_of_exportable_impls: TypedArena<FxIndexMap<DefId, usize>>,
        asm_template: TypedArena<InlineAsmTemplatePiece>,
        used_trait_imports: TypedArena<UnordSet<LocalDefId>>,
        is_late_bound_map: TypedArena<FxIndexSet<ItemLocalId>>,
        impl_source: TypedArena<ImplSource<'tcx, ()>>,
        dep_kind_vtable: TypedArena<DepKindVTable<'tcx>>,
        trait_impl_trait_tys: TypedArena<UnordMap<DefId, EarlyBinder<'tcx, Ty<'tcx>>>>,
        external_constraints: TypedArena<ExternalConstraintsData<TyCtxt<'tcx>>>,
        doc_link_resolutions: TypedArena<DocLinkResMap>,
        stripped_cfg_items: TypedArena<StrippedCfgItem>,
        mod_child: TypedArena<ModChild>,
        features: TypedArena<Features>,
        specialization_graph: TypedArena<Graph>,
        crate_inherent_impls: TypedArena<CrateInherentImpls>,
        hir_owner_nodes: TypedArena<OwnerNodes<'tcx>>,
        token_stream: TypedArena<TokenStream>,
        maybe_owner: TypedArena<ProjectedMaybeOwner<'tcx>>,
        owner_info: TypedArena<ProjectedOwnerInfo<'tcx>>,
        parenting: TypedArena<LocalDefIdMap<ItemLocalId>>,
        trait_candidates: TypedArena<ItemLocalMap<&'tcx [TraitCandidate<'tcx>]>>,
        delayed_lints: TypedArena<Steal<DelayedLints>>,
    }

## Fields§

§`dropless: DroplessArena`§`layout: TypedArena<LayoutData<FieldIdx, VariantIdx>>`§`proxy_coroutine_layout: TypedArena<CoroutineLayout<'tcx>>`§`fn_abi: TypedArena<FnAbi<'tcx, Ty<'tcx>>>`§`adt_def: TypedArena<AdtDefData>`§`steal_thir: TypedArena<Steal<Thir<'tcx>>>`§`steal_mir: TypedArena<Steal<Body<'tcx>>>`§`mir: TypedArena<Body<'tcx>>`§`steal_promoted: TypedArena<Steal<IndexVec<Promoted, Body<'tcx>>>>`§`promoted: TypedArena<IndexVec<Promoted, Body<'tcx>>>`§`typeck_results: TypedArena<TypeckResults<'tcx>>`§`borrowck_result: TypedArena<FxIndexMap<LocalDefId, DefinitionSiteHiddenType<'tcx>>>`§`resolver: TypedArena<Steal<(ResolverAstLowering<'tcx>, Arc<Crate>)>>`§`crate_for_resolver: TypedArena<Steal<(Crate, AttrVec)>>`§`resolutions: TypedArena<ResolverGlobalCtxt>`§`const_allocs: TypedArena<Allocation>`§`region_scope_tree: TypedArena<ScopeTree>`§`mir_keys: TypedArena<DefIdSet>`§`dropck_outlives: TypedArena<Canonical<'tcx, QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>>`§`normalize_canonicalized_projection: TypedArena<Canonical<'tcx, QueryResponse<'tcx, NormalizationResult<'tcx>>>>`§`implied_outlives_bounds: TypedArena<Canonical<'tcx, QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>>`§`dtorck_constraint: TypedArena<DropckConstraint<'tcx>>`§`candidate_step: TypedArena<CandidateStep<'tcx>>`§`autoderef_bad_ty: TypedArena<MethodAutoderefBadTy<'tcx>>`§`query_region_constraints: TypedArena<QueryRegionConstraints<'tcx>>`§`type_op_subtype: TypedArena<Canonical<'tcx, QueryResponse<'tcx, ()>>>`§`type_op_normalize_poly_fn_sig: TypedArena<Canonical<'tcx, QueryResponse<'tcx, PolyFnSig<'tcx>>>>`§`type_op_normalize_fn_sig: TypedArena<Canonical<'tcx, QueryResponse<'tcx, FnSig<'tcx>>>>`§`type_op_normalize_clause: TypedArena<Canonical<'tcx, QueryResponse<'tcx, Clause<'tcx>>>>`§`type_op_normalize_ty: TypedArena<Canonical<'tcx, QueryResponse<'tcx, Ty<'tcx>>>>`§`inspect_probe: TypedArena<Probe<TyCtxt<'tcx>>>`§`effective_visibilities: TypedArena<EffectiveVisibilities>`§`upvars_mentioned: TypedArena<FxIndexMap<HirId, Upvar>>`§`dyn_compatibility_violations: TypedArena<DynCompatibilityViolation>`§`codegen_unit: TypedArena<CodegenUnit<'tcx>>`§`attribute: TypedArena<Attribute>`§`name_set: TypedArena<UnordSet<Symbol>>`§`autodiff_item: TypedArena<AutoDiffItem>`§`ordered_name_set: TypedArena<FxIndexSet<Symbol>>`§`stable_order_of_exportable_impls: TypedArena<FxIndexMap<DefId, usize>>`§`asm_template: TypedArena<InlineAsmTemplatePiece>`§`used_trait_imports: TypedArena<UnordSet<LocalDefId>>`§`is_late_bound_map: TypedArena<FxIndexSet<ItemLocalId>>`§`impl_source: TypedArena<ImplSource<'tcx, ()>>`§`dep_kind_vtable: TypedArena<DepKindVTable<'tcx>>`§`trait_impl_trait_tys: TypedArena<UnordMap<DefId, EarlyBinder<'tcx, Ty<'tcx>>>>`§`external_constraints: TypedArena<ExternalConstraintsData<TyCtxt<'tcx>>>`§`doc_link_resolutions: TypedArena<DocLinkResMap>`§`stripped_cfg_items: TypedArena<StrippedCfgItem>`§`mod_child: TypedArena<ModChild>`§`features: TypedArena<Features>`§`specialization_graph: TypedArena<Graph>`§`crate_inherent_impls: TypedArena<CrateInherentImpls>`§`hir_owner_nodes: TypedArena<OwnerNodes<'tcx>>`§`token_stream: TypedArena<TokenStream>`§`maybe_owner: TypedArena<ProjectedMaybeOwner<'tcx>>`§`owner_info: TypedArena<ProjectedOwnerInfo<'tcx>>`§`parenting: TypedArena<LocalDefIdMap<ItemLocalId>>`§`trait_candidates: TypedArena<ItemLocalMap<&'tcx [TraitCandidate<'tcx>]>>`§`delayed_lints: TypedArena<Steal<DelayedLints>>`

## Implementations§

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### impl<'tcx> Arena<'tcx>

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#### pub fn alloc<T: ArenaAllocatable<'tcx, C>, C>(&'tcx self, value: T) -> &mut T

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#### pub fn alloc_slice<T: Copy>(&self, value: &[T]) -> &mut [T]

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#### pub fn alloc_str(&self, string: &str) -> &str

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#### pub fn alloc_from_iter<T: ArenaAllocatable<'tcx, C>, C>( &'tcx self, iter: impl IntoIterator<Item = T>, ) -> &mut [T]

## Trait Implementations§

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### impl<'tcx> Default for Arena<'tcx>

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#### fn default() -> Arena<'tcx>

Returns the “default value” for a type. Read more

## Auto Trait Implementations§

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### impl<'tcx> DynSend for Arena<'tcx>

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### impl<'tcx> !DynSync for Arena<'tcx>

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### impl<'tcx> !Freeze for Arena<'tcx>

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### impl<'tcx> !RefUnwindSafe for Arena<'tcx>

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### impl<'tcx> !Send for Arena<'tcx>

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### impl<'tcx> !Sync for Arena<'tcx>

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### impl<'tcx> Unpin for Arena<'tcx>

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### impl<'tcx> UnsafeUnpin for Arena<'tcx>

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### impl<'tcx> !UnwindSafe for Arena<'tcx>

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment

Alignment of `Self`.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

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#### type Output = R

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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<K> IntoQueryKey<K> for K

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#### fn into_query_key(self) -> K

Argument conversion from `Self` to `K`. This should always be a very cheap conversion, e.g. `LocalDefId::to_def_id`.
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### impl<T> MaybeResult<T> for T

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#### type Error = !

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#### fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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#### fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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### impl<T> Pointable for T

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#### const ALIGN: usize

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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#### fn upcast(self, interner: I) -> U

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### impl<I, T> UpcastFrom<I, T> for T

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#### fn upcast_from(from: T, _tcx: I) -> T

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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<T> ErasedDestructor for T
where T: 'static,

## 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: 2880 bytes