# Struct rustc_mir_dataflow::impls::storage_liveness::MaybeRequiresStorage

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    pub struct MaybeRequiresStorage<'mir, 'tcx> {
        borrowed_locals: ResultsCursor<'mir, 'tcx, MaybeBorrowedLocals>,
    }

Expand description

Dataflow analysis that determines whether each local requires storage at a given location; i.e. whether its storage can go away without being observed.

## Fields§

§`borrowed_locals: ResultsCursor<'mir, 'tcx, MaybeBorrowedLocals>`

## Implementations§

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### impl<'mir, 'tcx> MaybeRequiresStorage<'mir, 'tcx>

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#### pub fn new( borrowed_locals: ResultsCursor<'mir, 'tcx, MaybeBorrowedLocals> ) -> Self

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### impl<'tcx> MaybeRequiresStorage<'_, 'tcx>

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#### fn check_for_move(&mut self, trans: &mut impl GenKill<Local>, loc: Location)

Kill locals that are fully moved and have not been borrowed.

## Trait Implementations§

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### impl<'tcx> AnalysisDomain<'tcx> for MaybeRequiresStorage<'_, 'tcx>

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#### type Domain = BitSet<Local>

The type that holds the dataflow state at any given point in the program.
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#### const NAME: &'static str = "requires_storage"

A descriptive name for this analysis. Used only for debugging. Read more
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#### fn bottom_value(&self, body: &Body<'tcx>) -> Self::Domain

Returns the initial value of the dataflow state upon entry to each basic block.
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#### fn initialize_start_block(&self, body: &Body<'tcx>, on_entry: &mut Self::Domain)

Mutates the initial value of the dataflow state upon entry to the `START_BLOCK`. Read more
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#### type Direction = Forward

The direction of this analysis. Either `Forward` or `Backward`.
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### impl<'tcx> GenKillAnalysis<'tcx> for MaybeRequiresStorage<'_, 'tcx>

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#### type Idx = Local

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#### fn domain_size(&self, body: &Body<'tcx>) -> usize

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#### fn before_statement_effect( &mut self, trans: &mut impl GenKill<Self::Idx>, stmt: &Statement<'tcx>, loc: Location )

See `Analysis::apply_before_statement_effect`. Note how the second arg differs.
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#### fn statement_effect( &mut self, trans: &mut impl GenKill<Self::Idx>, _: &Statement<'tcx>, loc: Location )

See `Analysis::apply_statement_effect`. Note how the second arg differs.
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#### fn before_terminator_effect( &mut self, trans: &mut Self::Domain, terminator: &Terminator<'tcx>, loc: Location )

See `Analysis::apply_before_terminator_effect`.
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#### fn terminator_effect<'t>( &mut self, trans: &mut Self::Domain, terminator: &'t Terminator<'tcx>, loc: Location ) -> TerminatorEdges<'t, 'tcx>

See `Analysis::apply_terminator_effect`.
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#### fn call_return_effect( &mut self, trans: &mut Self::Domain, _block: BasicBlock, return_places: CallReturnPlaces<'_, 'tcx> )

See `Analysis::apply_call_return_effect`.
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#### fn switch_int_edge_effects<G: GenKill<Self::Idx>>( &mut self, _block: BasicBlock, _discr: &Operand<'tcx>, _edge_effects: &mut impl SwitchIntEdgeEffects<G> )

See `Analysis::apply_switch_int_edge_effects`.

## Auto Trait Implementations§

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### impl<'mir, 'tcx> DynSend for MaybeRequiresStorage<'mir, 'tcx>

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### impl<'mir, 'tcx> DynSync for MaybeRequiresStorage<'mir, 'tcx>

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### impl<'mir, 'tcx> Freeze for MaybeRequiresStorage<'mir, 'tcx>

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### impl<'mir, 'tcx> !RefUnwindSafe for MaybeRequiresStorage<'mir, 'tcx>

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### impl<'mir, 'tcx> Send for MaybeRequiresStorage<'mir, 'tcx>

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### impl<'mir, 'tcx> Sync for MaybeRequiresStorage<'mir, 'tcx>

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### impl<'mir, 'tcx> Unpin for MaybeRequiresStorage<'mir, 'tcx>

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### impl<'mir, 'tcx> !UnwindSafe for MaybeRequiresStorage<'mir, '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> Filterable for T

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#### fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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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<P> IntoQueryParam<P> for P

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#### fn into_query_param(self) -> P

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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<'tcx, T> ToPredicate<'tcx, T> for T

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#### fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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

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

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### impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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#### default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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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<'a, T> Captures<'a> for T
where T: ?Sized,

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### impl<T> ErasedDestructor for T
where T: 'static,

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### impl<T> MaybeSendSync for T
where T: Send + Sync,

## 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: 128 bytes