Struct SequenceGenerator 

pub struct SequenceGenerator;

Generates monotonically increasing i64 values. Note that only values >= 0 will be returned such that any negative value can be assumed to be invalid.

Provides implementations of:

• Generator - returns increasing i64 values.
• GeneratorWithInvalid - returns an invalid, as an ID, i64 value.
• GeneratorFromStr - ensures validity of a string representation as an i64 ID.
• GeneratorFromSeed - initializes the generator with a known seed value.

Trait Implementations

impl Clone for SequenceGenerator

fn clone(&self) -> SequenceGenerator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SequenceGenerator

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

Formats the value using the given formatter.

impl Default for SequenceGenerator

fn default() -> SequenceGenerator

Returns the “default value” for a type.

impl Generator<i64> for SequenceGenerator

fn next_id(&self) -> i64

Generate a new ID, this may be an entirely random value, or as the name implies the next in some logical sequence.

impl GeneratorFromSeed<i64> for SequenceGenerator

fn new(seed: i64) -> Self

Create a new generator with the provided value as a seed. If the value for seed is invalid as an ID this function will panic.

impl GeneratorFromStr<i64> for SequenceGenerator

fn is_valid_value(s: &str) -> bool

Is the value s valid as an ID?

impl GeneratorWithInvalid<i64> for SequenceGenerator

fn invalid_id() -> i64

where Self: Sized,

Return a unique value that is not valid as an ID.