Struct Ulid 

pub struct Ulid(/* private fields */);

Ulid A Candid-safe wrapper around ulid::Ulid.

Implementations

impl Ulid

pub const fn nil() -> Self

pub const fn from_bytes(bytes: [u8; 16]) -> Self

pub const fn from_parts(timestamp_ms: u64, random: u128) -> Self

pub fn from_string(s: &str) -> Result<Self, DecodeError>

pub fn increment(&self) -> Option<Self>

Methods from Deref<Target = WrappedUlid>

pub const TIME_BITS: u8 = 48u8

pub const RAND_BITS: u8 = 80u8

pub fn timestamp_ms(&self) -> u64

Gets the timestamp section of this ulid

Example

use std::time::{SystemTime, Duration};
use ulid::Ulid;

let dt = SystemTime::now();
let ulid = Ulid::from_datetime(dt);

assert_eq!(u128::from(ulid.timestamp_ms()), dt.duration_since(SystemTime::UNIX_EPOCH).unwrap_or(Duration::ZERO).as_millis());

pub fn random(&self) -> u128

Gets the random section of this ulid

Example

use ulid::Ulid;

let text = "01D39ZY06FGSCTVN4T2V9PKHFZ";
let ulid = Ulid::from_string(text).unwrap();
let ulid_next = ulid.increment().unwrap();

assert_eq!(ulid.random() + 1, ulid_next.random());

pub fn to_str<'buf>( &self, buf: &'buf mut [u8], ) -> Result<&'buf mut str, EncodeError>

👎Deprecated since 1.2.0: Use the infallible array_to_str instead.

Creates a Crockford Base32 encoded string that represents this Ulid

Example

use ulid::Ulid;

let text = "01D39ZY06FGSCTVN4T2V9PKHFZ";
let ulid = Ulid::from_string(text).unwrap();

let mut buf = [0; ulid::ULID_LEN];
let new_text = ulid.to_str(&mut buf).unwrap();

assert_eq!(new_text, text);

pub fn array_to_str<'buf>(&self, buf: &'buf mut [u8; 26]) -> &'buf mut str

Creates a Crockford Base32 encoded string that represents this Ulid

Example

use ulid::Ulid;

let text = "01D39ZY06FGSCTVN4T2V9PKHFZ";
let ulid = Ulid::from_string(text).unwrap();

let mut buf = [0; ulid::ULID_LEN];
let new_text = ulid.array_to_str(&mut buf);

assert_eq!(new_text, text);

pub fn is_nil(&self) -> bool

Test if the Ulid is nil

Example

use ulid::Ulid;

let ulid = Ulid::new();
assert!(!ulid.is_nil());

let nil = Ulid::nil();
assert!(nil.is_nil());

pub fn increment(&self) -> Option<Ulid>

Increment the random number, make sure that the ts millis stays the same

pub fn to_bytes(&self) -> [u8; 16]

Returns the bytes of the Ulid in big-endian order.

Example

use ulid::Ulid;

let text = "7ZZZZZZZZZZZZZZZZZZZZZZZZZ";
let ulid = Ulid::from_string(text).unwrap();

assert_eq!(ulid.to_bytes(), [0xFF; 16]);

Trait Implementations

impl CandidType for Ulid

fn _ty() -> Type

fn idl_serialize<S>(&self, serializer: S) -> Result<(), S::Error>

where S: Serializer,

fn ty() -> Type

fn id() -> TypeId

impl Clone for Ulid

fn clone(&self) -> Ulid

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ulid

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

Formats the value using the given formatter.

impl Deref for Ulid

type Target = Ulid

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for Ulid

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<'de> Deserialize<'de> for Ulid

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Ulid

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

Formats the value using the given formatter.

impl From<Ulid> for Ulid

fn from(u: WrappedUlid) -> Self

Converts to this type from the input type.

impl From<Ulid> for Ulid

fn from(u: Ulid) -> Self

Converts to this type from the input type.

impl FromStr for Ulid

type Err = <Ulid as FromStr>::Err

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Ulid

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 Ulid

fn cmp(&self, other: &Ulid) -> 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 Ulid

fn eq(&self, other: &Ulid) -> 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 Ulid

fn partial_cmp(&self, other: &Ulid) -> 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 Serialize for Ulid

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Ulid

impl Eq for Ulid

impl StructuralPartialEq for Ulid