Trait RawAccess

pub trait RawAccess: Clone {
    type Changes: ChangeSet;

    // Required methods
    fn snapshot(&self) -> &dyn Snapshot;
    fn changes(&self, address: &ResolvedAddress) -> Self::Changes;
}

Allows to read data from the database. The data consists of a snapshot and changes relative to this snapshot. Depending on the implementation, the changes can be empty, immutable or mutable.

This trait is rarely needs to be used directly; Access is a more high-level trait encompassing access to database. In particular, using snapshot() method to convert the implementation into &dyn Snapshot is logically incorrect, because the snapshot may not reflect the most recent state of RawAccess.

Required Associated Types

type Changes: ChangeSet

Type of the changes() that will be applied to the database.

Required Methods

fn snapshot(&self) -> &dyn Snapshot

Reference to a Snapshot. This is the base relative to which the changes are defined.

fn changes(&self, address: &ResolvedAddress) -> Self::Changes

Returns changes related to specific address compared to the snapshot().

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl RawAccess for &Box<dyn Snapshot>

type Changes = ()

fn snapshot(&self) -> &dyn Snapshot

fn changes(&self, _address: &ResolvedAddress) -> Self::Changes

impl RawAccess for Rc<Fork>

type Changes = ChangesMut<'static>

fn snapshot(&self) -> &dyn Snapshot

fn changes(&self, address: &ResolvedAddress) -> Self::Changes

impl RawAccess for Rc<dyn Snapshot>

type Changes = ()

fn snapshot(&self) -> &dyn Snapshot

fn changes(&self, _address: &ResolvedAddress) -> Self::Changes

impl RawAccess for Arc<dyn Snapshot>

type Changes = ()

fn snapshot(&self) -> &dyn Snapshot

fn changes(&self, _address: &ResolvedAddress) -> Self::Changes

Implementors

impl RawAccess for &Patch

type Changes = ()

impl RawAccess for &dyn Snapshot

type Changes = ()

impl RawAccess for OwnedReadonlyFork

type Changes = ChangesRef<'static>

impl<'a> RawAccess for &'a Fork

type Changes = ChangesMut<'a>

impl<'a> RawAccess for GenericRawAccess<'a>

type Changes = GenericChanges<'a>

impl<'a> RawAccess for ReadonlyFork<'a>

type Changes = ChangesRef<'a>