Struct rustc_hir_typeck::upvar::InferBorrowKind

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struct InferBorrowKind<'tcx> {
    closure_def_id: LocalDefId,
    capture_information: Vec<(Place<'tcx>, CaptureInfo)>,
    fake_reads: Vec<(Place<'tcx>, FakeReadCause, HirId)>,
}

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§closure_def_id: LocalDefId§capture_information: Vec<(Place<'tcx>, CaptureInfo)>

For each Place that is captured by the closure, we track the minimal kind of access we need (ref, ref mut, move, etc) and the expression that resulted in such access.

Consider closure where s.str1 is captured via an ImmutableBorrow and s.str2 via a MutableBorrow

struct SomeStruct { str1: String, str2: String };

// Assume that the HirId for the variable definition is `V1`
let mut s = SomeStruct { str1: format!("s1"), str2: format!("s2") };

let fix_s = |new_s2| {
    // Assume that the HirId for the expression `s.str1` is `E1`
    println!("Updating SomeStruct with str1={0}", s.str1);
    // Assume that the HirId for the expression `*s.str2` is `E2`
    s.str2 = new_s2;
};

For closure fix_s, (at a high level) the map contains

Place { V1, [ProjectionKind::Field(Index=0, Variant=0)] } : CaptureKind { E1, ImmutableBorrow }
Place { V1, [ProjectionKind::Field(Index=1, Variant=0)] } : CaptureKind { E2, MutableBorrow }
§fake_reads: Vec<(Place<'tcx>, FakeReadCause, HirId)>

Trait Implementations§

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impl<'tcx> Delegate<'tcx> for InferBorrowKind<'tcx>

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fn fake_read( &mut self, place: &PlaceWithHirId<'tcx>, cause: FakeReadCause, diag_expr_id: HirId )

The place should be a fake read because of specified cause.
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fn consume(&mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)

The value found at place is moved, depending on mode. Where diag_expr_id is the id used for diagnostics for place. Read more
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fn borrow( &mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId, bk: BorrowKind )

The value found at place is being borrowed with kind bk. diag_expr_id is the id used for diagnostics (see consume for more details).
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fn mutate(&mut self, assignee_place: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)

The path at assignee_place is being assigned to. diag_expr_id is the id used for diagnostics (see consume for more details).
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fn copy(&mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)

The value found at place is being copied. diag_expr_id is the id used for diagnostics (see consume for more details).
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fn bind(&mut self, binding_place: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)

The path at binding_place is a binding that is being initialized. Read more

Auto Trait Implementations§

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impl<'tcx> DynSend for InferBorrowKind<'tcx>

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impl<'tcx> DynSync for InferBorrowKind<'tcx>

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impl<'tcx> Freeze for InferBorrowKind<'tcx>

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impl<'tcx> !RefUnwindSafe for InferBorrowKind<'tcx>

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impl<'tcx> Send for InferBorrowKind<'tcx>

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impl<'tcx> Sync for InferBorrowKind<'tcx>

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impl<'tcx> Unpin for InferBorrowKind<'tcx>

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impl<'tcx> !UnwindSafe for InferBorrowKind<'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<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<P> IntoQueryParam<P> for 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<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<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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where S: Into<Dispatch>,

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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: 56 bytes