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Struct std::mem::Assume

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pub struct Assume {
 pub alignment: bool,
 pub lifetimes: bool,
 pub validity: bool,
 pub visibility: bool,
}
🔬 This is a nightly-only experimental API. (transmutability #99571)
Expand description

What transmutation safety conditions shall the compiler assume that you are checking?

Fields

alignment: bool
🔬 This is a nightly-only experimental API. (transmutability #99571)

When true, the compiler assumes that you are ensuring (either dynamically or statically) that destination referents do not have stricter alignment requirements than source referents.

lifetimes: bool
🔬 This is a nightly-only experimental API. (transmutability #99571)

When true, the compiler assume that you are ensuring that lifetimes are not extended in a manner that violates Rust’s memory model.

validity: bool
🔬 This is a nightly-only experimental API. (transmutability #99571)

When true, the compiler assumes that you are ensuring that the source type is actually a valid instance of the destination type.

visibility: bool
🔬 This is a nightly-only experimental API. (transmutability #99571)

When true, the compiler assumes that you have ensured that it is safe for you to violate the type and field privacy of the destination type (and sometimes of the source type, too).

Trait Implementations

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impl Clone for Assume

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fn clone(&self) -> Assume

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 Debug for Assume

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

Formats the value using the given formatter. Read more

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impl PartialEq<Assume> for Assume

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fn eq(&self, other: &Assume) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

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fn ne(&self, other: &Assume) -> bool

This method tests for !=.

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impl Copy for Assume

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impl Eq for Assume

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impl StructuralEq for Assume

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impl StructuralPartialEq for Assume

Auto Trait Implementations

impl RefUnwindSafe for Assume

impl Send for Assume

impl Sync for Assume

impl Unpin for Assume

impl UnwindSafe for Assume

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,

const: unstable · source

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,

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 T where
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 T where
T: Clone,

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>,

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 T where
U: TryFrom<T>,

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.

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