Enum rustc_borrowck::ReadOrWrite

pub(crate) enum ReadOrWrite {
    Read(ReadKind),
    Write(WriteKind),
    Reservation(WriteKind),
    Activation(WriteKind, BorrowIndex),
}

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

Variants

Read(ReadKind)

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

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).

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.

Activation(WriteKind, BorrowIndex)

Trait Implementations

impl Clone for ReadOrWrite

fn clone(&self) -> ReadOrWrite

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ReadOrWrite

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

Formats the value using the given formatter.

impl PartialEq<ReadOrWrite> for ReadOrWrite

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

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

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

This method tests for !=.

impl Copy for ReadOrWrite

impl Eq for ReadOrWrite

impl StructuralEq for ReadOrWrite

impl StructuralPartialEq for ReadOrWrite

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