Struct exonum::helpers::Round

pub struct Round(pub u32);

Consensus round index.

Methods

impl Round

pub fn zero() -> Self

Returns zero value of the round.

Examples

use exonum::helpers::Round;

let round = Round::zero();
assert_eq!(0, round.0);

pub fn first() -> Self

Returns first value of the round.

Examples

use exonum::helpers::Round;

let round = Round::first();
assert_eq!(1, round.0);

pub fn next(&self) -> Self

Returns next value of the round.

Examples

use exonum::helpers::Round;

let round = Round(20);
let next_round = round.next();
assert_eq!(21, next_round.0);

pub fn previous(&self) -> Self

Returns previous value of the round.

Panics

Panics if self.0 is equal to zero.

Examples

use exonum::helpers::Round;

let round = Round(10);
let previous_round = round.previous();
assert_eq!(9, previous_round.0);

pub fn increment(&mut self)

Increments the round value.

Examples

use exonum::helpers::Round;

let mut round = Round::zero();
round.increment();
assert_eq!(1, round.0);

pub fn decrement(&mut self)

Decrements the round value.

Panics

Panics if self.0 is equal to zero.

Examples

use exonum::helpers::Round;

let mut round = Round(20);
round.decrement();
assert_eq!(19, round.0);

pub fn iter_to(&self, to: Round) -> RoundRangeIter

Returns the iterator over rounds in the range from self to to - 1.

Examples

use exonum::helpers::Round;

let round = Round::zero();
let mut iter = round.iter_to(Round(2));
assert_eq!(Some(Round(0)), iter.next());
assert_eq!(Some(Round(1)), iter.next());
assert_eq!(None, iter.next());

Trait Implementations

impl ExonumJson for Round

fn deserialize_field<B: WriteBufferWrapper>(
    value: &Value,
    buffer: &mut B,
    from: Offset,
    to: Offset
) -> Result<(), Box<Error>>

write deserialized field in buffer on place.

fn serialize_field(&self) -> Result<Value, Box<Error + Send + Sync>>

serialize field as json::Value

impl<'a> Field<'a> for Round

fn field_size() -> Offset

Field's header size

unsafe fn read(buffer: &'a [u8], from: Offset, to: Offset) -> Round

Read Field from buffer, with given position, beware of memory unsafety, you should check Field before read.

fn write(&self, buffer: &mut Vec<u8>, from: Offset, to: Offset)

Write Field to buffer, in given position write doesn't lead to memory unsafety.

fn check(
    _: &'a [u8],
    from: CheckedOffset,
    to: CheckedOffset,
    latest_segment: CheckedOffset
) -> Result

Checks if data in the buffer could be deserialized. Returns an index of latest data seen.

impl Debug for Round

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Copy for Round

impl Clone for Round

fn clone(&self) -> Round

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for Round

fn eq(&self, __arg_0: &Round) -> bool

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

fn ne(&self, __arg_0: &Round) -> bool

This method tests for !=.

impl Eq for Round

impl PartialOrd for Round

fn partial_cmp(&self, __arg_0: &Round) -> Option<Ordering>

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

fn lt(&self, __arg_0: &Round) -> bool

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

fn le(&self, __arg_0: &Round) -> bool

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

fn gt(&self, __arg_0: &Round) -> bool

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

fn ge(&self, __arg_0: &Round) -> bool

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

impl Ord for Round

fn cmp(&self, __arg_0: &Round) -> 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.

impl Hash for Round

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

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 Display for Round

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

Formats the value using the given formatter.

impl From<Round> for u32

fn from(val: Round) -> Self

Performs the conversion.

impl From<Round> for u64

fn from(val: Round) -> Self

Performs the conversion.

impl CryptoHash for Round

fn hash(&self) -> Hash

Returns a hash of the value.

impl StorageValue for Round

Important traits for Vec<u8>

impl Write for Vec<u8>

fn into_bytes(self) -> Vec<u8>

Serialize a value into a vector of bytes.

fn from_bytes(value: Cow<[u8]>) -> Self

Deserialize a value from bytes.