Struct rustc_const_eval::interpret::stack::LocalState

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pub struct LocalState<'tcx, Prov: Provenance = CtfeProvenance> {
    value: LocalValue<Prov>,
    layout: Cell<Option<TyAndLayout<'tcx>>>,
}
Expand description

State of a local variable including a memoized layout

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§value: LocalValue<Prov>§layout: Cell<Option<TyAndLayout<'tcx>>>

Don’t modify if Some, this is only used to prevent computing the layout twice. Avoids computing the layout of locals that are never actually initialized.

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impl<'tcx, Prov: Provenance> LocalState<'tcx, Prov>

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pub fn make_live_uninit(&mut self)

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pub fn as_mplace_or_imm( &self, ) -> Option<Either<(Pointer<Option<Prov>>, MemPlaceMeta<Prov>), Immediate<Prov>>>

This is a hack because Miri needs a way to visit all the provenance in a LocalState without having a layout or TyCtxt available, and we want to keep the Operand type private.

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pub(super) fn access(&self) -> InterpResult<'tcx, &Operand<Prov>>

Read the local’s value or error if the local is not yet live or not live anymore.

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pub(super) fn access_mut(&mut self) -> InterpResult<'tcx, &mut Operand<Prov>>

Overwrite the local. If the local can be overwritten in place, return a reference to do so; otherwise return the MemPlace to consult instead.

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impl<'tcx, Prov: Provenance> LocalState<'tcx, Prov>

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pub(super) fn print( &self, allocs: &mut Vec<Option<AllocId>>, fmt: &mut Formatter<'_>, ) -> Result

Trait Implementations§

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impl<'tcx, Prov: Clone + Provenance> Clone for LocalState<'tcx, Prov>

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fn clone(&self) -> LocalState<'tcx, Prov>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<Prov: Provenance> Debug for LocalState<'_, Prov>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'tcx, Prov = CtfeProvenance> !Freeze for LocalState<'tcx, Prov>

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impl<'tcx, Prov = CtfeProvenance> !RefUnwindSafe for LocalState<'tcx, Prov>

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impl<'tcx, Prov> Send for LocalState<'tcx, Prov>
where Prov: Send,

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impl<'tcx, Prov = CtfeProvenance> !Sync for LocalState<'tcx, Prov>

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impl<'tcx, Prov> Unpin for LocalState<'tcx, Prov>
where Prov: Unpin,

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impl<'tcx, Prov = CtfeProvenance> !UnwindSafe for LocalState<'tcx, Prov>

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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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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

Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.