# Struct rustc_const_eval::interpret::Allocation

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    pub struct Allocation<Prov = CtfeProvenance, Extra = (), Bytes = Box<[u8]>>where
        Prov: Provenance,{
        bytes: Bytes,
        provenance: ProvenanceMap<Prov>,
        init_mask: InitMask,
        pub align: Align,
        pub mutability: Mutability,
        pub extra: Extra,
    }

Expand description

This type represents an Allocation in the Miri/CTFE core engine.

Its public API is rather low-level, working directly with allocation offsets and a custom error type to account for the lack of an AllocId on this level. The Miri/CTFE core engine `memory` module provides higher-level access.

## Fields§

§`bytes: Bytes`§`provenance: ProvenanceMap<Prov>`§`init_mask: InitMask`§`align: Align`

The alignment of the allocation to detect unaligned reads. (`Align` guarantees that this is a power of two.)

§`mutability: Mutability`

`true` if the allocation is mutable. Also used by codegen to determine if a static should be put into mutable memory, which happens for `static mut` and `static` with interior mutability.

§`extra: Extra`

Extra state for the machine.

## Auto Trait Implementations§

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### impl<Prov, Extra, Bytes> RefUnwindSafe for Allocation<Prov, Extra, Bytes>
where Bytes: RefUnwindSafe, Extra: RefUnwindSafe, Prov: RefUnwindSafe,

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### impl<Prov, Extra, Bytes> Send for Allocation<Prov, Extra, Bytes>
where Bytes: Send, Extra: Send, Prov: Send,

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### impl<Prov, Extra, Bytes> Sync for Allocation<Prov, Extra, Bytes>
where Bytes: Sync, Extra: Sync, Prov: Sync,

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### impl<Prov, Extra, Bytes> Unpin for Allocation<Prov, Extra, Bytes>
where Bytes: Unpin, Extra: Unpin, Prov: Unpin,

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### impl<Prov, Extra, Bytes> UnwindSafe for Allocation<Prov, Extra, Bytes>
where Bytes: UnwindSafe, Extra: UnwindSafe, Prov: UnwindSafe,

## Blanket Implementations§

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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> 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 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> 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.

## 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.