pub struct LocalState<'tcx, Prov: Provenance = AllocId> {
    pub value: LocalValue<Prov>,
    pub 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

Implementations§

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

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pub 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 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.

Note: This may only be invoked from the Machine::access_local_mut hook and not from anywhere else. You may be invalidating machine invariants if you do!

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
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx, Prov: Debug + Provenance> Debug for LocalState<'tcx, 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 = AllocId> !RefUnwindSafe for LocalState<'tcx, Prov>

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impl<'tcx, Prov = AllocId> !Send for LocalState<'tcx, Prov>

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

Blanket Implementations§

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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,

const: unstable · source§

fn borrow(&self) -> &T

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

const: unstable · source§

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

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere
    U: From<T>,

const: unstable · source§

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> ToOwned for Twhere
    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 Twhere
    U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

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.