Enum miri::Immediate

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pub enum Immediate<Prov = CtfeProvenance>
where
    Prov: Provenance,
{
    Scalar(Scalar<Prov>),
    ScalarPair(Scalar<Prov>, Scalar<Prov>),
    Uninit,
}
Expand description

An Immediate represents a single immediate self-contained Rust value.

For optimization of a few very common cases, there is also a representation for a pair of primitive values (ScalarPair). It allows Miri to avoid making allocations for checked binary operations and wide pointers. This idea was taken from rustc’s codegen. In particular, thanks to ScalarPair, arithmetic operations and casts can be entirely defined on Immediate, and do not have to work with a Place.

Variants§

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Scalar(Scalar<Prov>)

A single scalar value (must have initialized Scalar ABI).

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ScalarPair(Scalar<Prov>, Scalar<Prov>)

A pair of two scalar value (must have ScalarPair ABI where both fields are Scalar::Initialized).

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Uninit

A value of fully uninitialized memory. Can have arbitrary size and layout, but must be sized.

Trait Implementations§

Auto Trait Implementations§

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impl<Prov> RefUnwindSafe for Immediate<Prov>
where Prov: RefUnwindSafe,

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impl<Prov> Send for Immediate<Prov>
where Prov: Send,

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impl<Prov> Sync for Immediate<Prov>
where Prov: Sync,

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impl<Prov> Unpin for Immediate<Prov>
where Prov: Unpin,

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impl<Prov> UnwindSafe for Immediate<Prov>
where 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> 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<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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.