Struct SeqMarked 

pub struct SeqMarked<D = Vec<u8>> { /* private fields */ }

Sequence-numbered marked value.

Ordered by sequence number first, then tombstone > normal.

use seqmarked::SeqMarked;

let v1 = SeqMarked::new_normal(1, "data");
let v2 = SeqMarked::<&str>::new_tombstone(2);
assert!(v1 < v2);

Implementations

impl<D> SeqMarked<D>

pub fn new_normal(seq: u64, data: D) -> Self

Creates normal value with sequence number.

pub fn new_tombstone(seq: u64) -> Self

Creates tombstone with sequence number.

pub fn is_normal(&self) -> bool

Returns true if this is normal data.

pub fn is_tombstone(&self) -> bool

Returns true if this is a tombstone.

pub fn map<U>(self, f: impl FnOnce(D) -> U) -> SeqMarked<U>

Transforms data D to U while preserving sequence and tombstone state.

Example

use seqmarked::SeqMarked;

let a = SeqMarked::new_normal(1, "data");
let b = a.map(|x| x.len());
assert_eq!(b.data_ref(), Some(&4));

pub fn as_ref(&self) -> SeqMarked<&D>

Creates reference to the data.

pub fn order_key(&self) -> SeqMarked<()>

Returns ordering key (sequence + tombstone state only).

pub fn seq(&self) -> u64

Returns the sequence number.

pub fn data_ref(&self) -> Option<&D>

Returns reference to data if normal, None if tombstone.

pub fn into_data(self) -> Option<D>

Consumes and returns data if normal, None if tombstone.

pub fn display_with_debug(&self) -> impl Display + '_

where D: Debug,

Returns formatter for display using Debug trait.

Trait Implementations

impl<D: Clone> Clone for SeqMarked<D>

fn clone(&self) -> SeqMarked<D>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<D: Debug> Debug for SeqMarked<D>

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

Formats the value using the given formatter.

impl<D: Ord> Ord for SeqMarked<D>

fn cmp(&self, other: &SeqMarked<D>) -> 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<D: PartialEq> PartialEq for SeqMarked<D>

fn eq(&self, other: &SeqMarked<D>) -> 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<D: PartialOrd> PartialOrd for SeqMarked<D>

fn partial_cmp(&self, other: &SeqMarked<D>) -> 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<D: Eq> Eq for SeqMarked<D>

impl<D> StructuralPartialEq for SeqMarked<D>