Enum 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.

Implementations

impl Version

pub fn new(number: u64) -> Self

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 Clone for Version

fn clone(&self) -> Version

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Version

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

Formats the value using the given formatter.

impl Default for Version

fn default() -> Self

Returns the “default value” for a type.

impl Display for Version

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

Formats the value using the given formatter.

impl From<EventNumber> for Version

fn from(event_number: EventNumber) -> Self

Converts to this type from the input type.

impl From<Version> for Precondition

fn from(v: Version) -> Self

Converts to this type from the input type.

impl From<Version> for Since

fn from(v: Version) -> Self

Converts to this type from the input type.

impl Hash for Version

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

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Version

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd 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: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Sub for Version

type Output = i64

The resulting type after applying the - operator.

fn sub(self, rhs: Version) -> Self::Output

Performs the - operation.

impl Copy for Version

impl Eq for Version

impl StructuralPartialEq for Version