Enum cqrs::Version

pub enum Version {
    Initial,
    Number(EventNumber),
}

An aggregate version.

Variants

Initial

The version of an aggregate that has not had any events applied to it.

Number(EventNumber)

The version of the last event applied to the aggregate.

Methods

impl Version

pub fn new(number: u64) -> Version

Creates a new Version from a number.

The number 0 gets interpreted as being Version::Initial, while any other number is interpreted as the latest event number applied.

pub fn incr(&mut self)

Increments the version number to the next in sequence.

pub fn next_event(self) -> EventNumber

Returns the next event number in the sequence.

pub fn get(self) -> u64

Gets the version number as a raw u64.

pub fn event_number(self) -> Option<EventNumber>

Gets the version number as an EventNumber, returning None if the current verison is Version::Initial.

Trait Implementations

impl From<Version> for Since

fn from(v: Version) -> Since

Performs the conversion.

impl From<Version> for Precondition

fn from(v: Version) -> Precondition

Performs the conversion.

impl From<EventNumber> for Version

fn from(event_number: EventNumber) -> Version

Performs the conversion.

impl PartialEq<Version> for Version

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

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

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

This method tests for !=.

impl Display for Version

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

Formats the value using the given formatter.

impl Hash for Version

fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, 

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl PartialOrd<Version> for Version

fn partial_cmp(&self, other: &Version) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Version) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Version) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Version) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Version) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Version

impl Default for Version

fn default() -> Version

Returns the "default value" for a type.

impl Debug for Version

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

Formats the value using the given formatter.

impl Clone for Version

fn clone(&self) -> Version

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Ord for Version

fn cmp(&self, other: &Version) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl Eq for Version

impl Sub<Version> for Version

type Output = i64

The resulting type after applying the - operator.

fn sub(self, rhs: Version) -> <Version as Sub<Version>>::Output

Performs the - operation.