pub struct Borrows<'a, 'tcx> {
    tcx: TyCtxt<'tcx>,
    body: &'a Body<'tcx>,
    borrow_set: &'a BorrowSet<'tcx>,
    borrows_out_of_scope_at_location: FxIndexMap<Location, Vec<BorrowIndex>>,
}
Expand description

Borrows stores the data used in the analyses that track the flow of borrows.

It uniquely identifies every borrow (Rvalue::Ref) by a BorrowIndex, and maps each such index to a BorrowData describing the borrow. These indexes are used for representing the borrows in compact bitvectors.

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§tcx: TyCtxt<'tcx>§body: &'a Body<'tcx>§borrow_set: &'a BorrowSet<'tcx>§borrows_out_of_scope_at_location: FxIndexMap<Location, Vec<BorrowIndex>>

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impl<'a, 'tcx> Borrows<'a, 'tcx>

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pub fn new( tcx: TyCtxt<'tcx>, body: &'a Body<'tcx>, nonlexical_regioncx: &'a RegionInferenceContext<'tcx>, borrow_set: &'a BorrowSet<'tcx> ) -> Self

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pub fn location(&self, idx: BorrowIndex) -> &Location

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fn kill_loans_out_of_scope_at_location( &self, trans: &mut impl GenKill<BorrowIndex>, location: Location )

Add all borrows to the kill set, if those borrows are out of scope at location. That means they went out of a nonlexical scope

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fn kill_borrows_on_place( &self, trans: &mut impl GenKill<BorrowIndex>, place: Place<'tcx> )

Kill any borrows that conflict with place.

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impl<'tcx> AnalysisDomain<'tcx> for Borrows<'_, 'tcx>

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type Domain = BitSet<BorrowIndex>

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

A descriptive name for this analysis. Used only for debugging. Read more
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fn bottom_value(&self, _: &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<'tcx>, _: &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 DebugWithContext<Borrows<'_, '_>> for BorrowIndex

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

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fn fmt_diff_with( &self, old: &Self, ctxt: &C, f: &mut Formatter<'_> ) -> Result<(), Error>

Print the difference between self and old. Read more
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impl<'tcx> GenKillAnalysis<'tcx> for Borrows<'_, 'tcx>

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type Idx = BorrowIndex

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

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

See Analysis::apply_before_statement_effect.
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fn statement_effect( &mut self, trans: &mut impl GenKill<Self::Idx>, stmt: &Statement<'tcx>, location: Location )

See Analysis::apply_statement_effect.
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fn before_terminator_effect( &mut self, trans: &mut impl GenKill<Self::Idx>, _terminator: &Terminator<'tcx>, location: Location )

See Analysis::apply_before_terminator_effect.
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fn terminator_effect<'mir>( &mut self, trans: &mut Self::Domain, terminator: &'mir Terminator<'tcx>, _location: Location ) -> TerminatorEdges<'mir, 'tcx>

See Analysis::apply_terminator_effect.
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fn call_return_effect( &mut self, _trans: &mut impl GenKill<Self::Idx>, _block: BasicBlock, _return_places: CallReturnPlaces<'_, 'tcx> )

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

See Analysis::apply_switch_int_edge_effects.

Auto Trait Implementations§

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impl<'a, 'tcx> !RefUnwindSafe for Borrows<'a, 'tcx>

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impl<'a, 'tcx> !Send for Borrows<'a, 'tcx>

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impl<'a, 'tcx> !Sync for Borrows<'a, 'tcx>

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impl<'a, 'tcx> Unpin for Borrows<'a, 'tcx>

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impl<'a, 'tcx> !UnwindSafe for Borrows<'a, 'tcx>

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere 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, U> TryFrom<U> for Twhere 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 Twhere 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.

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: 80 bytes