pub(crate) enum ReadOrWrite {
    Read(ReadKind),
    Write(WriteKind),
    Reservation(WriteKind),
    Activation(WriteKindBorrowIndex),
}
Expand description

Kind of access to a value: read or write (For informational purposes only)

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Read(ReadKind)

From the RFC: “A read means that the existing data may be read, but will not be changed.”

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Write(WriteKind)

From the RFC: “A write means that the data may be mutated to new values or otherwise invalidated (for example, it could be de-initialized, as in a move operation).

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Reservation(WriteKind)

For two-phase borrows, we distinguish a reservation (which is treated like a Read) from an activation (which is treated like a write), and each of those is furthermore distinguished from Reads/Writes above.

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Activation(WriteKindBorrowIndex)

Trait Implementations§

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impl Clone for ReadOrWrite

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fn clone(&self) -> ReadOrWrite

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 Debug for ReadOrWrite

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

Formats the value using the given formatter. Read more
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impl PartialEq<ReadOrWrite> for ReadOrWrite

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for ReadOrWrite

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impl Eq for ReadOrWrite

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impl StructuralEq for ReadOrWrite

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impl StructuralPartialEq for ReadOrWrite

Auto Trait Implementations§

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: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes

Size for each variant:

  • Read: 1 byte
  • Write: 1 byte
  • Reservation: 1 byte
  • Activation: 7 bytes