Struct bonsaidb::core::ordered_varint::Signed

pub struct Signed(_);

A signed integer value.

This type encodes values in the range -2.pow(123)..2.pow(123) by using the first 5 bits to denote a signed byte length. This length ranges from -15..=15. The number of bytes read is always absolute, but the sign of the length is used to determine the overall sign of the encoded value. The remaining 3 bits of the first byte and any additional bytes are then used to store the integer in big-endian encoding.

Trait Implementations

impl Clone for Signed

pub fn clone(&self) -> Signed

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Signed

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

Formats the value using the given formatter.

impl From<i128> for Signed

pub fn from(value: i128) -> Signed

Performs the conversion.

impl From<i16> for Signed

pub fn from(value: i16) -> Signed

Performs the conversion.

impl From<i32> for Signed

pub fn from(value: i32) -> Signed

Performs the conversion.

impl From<i64> for Signed

pub fn from(value: i64) -> Signed

Performs the conversion.

impl From<i8> for Signed

pub fn from(value: i8) -> Signed

Performs the conversion.

impl Hash for Signed

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

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<'a> Key<'a> for Signed

pub fn from_ord_bytes(
    bytes: &'a [u8]
) -> Result<Signed, <Signed as KeyEncoding<'a, Signed>>::Error>

Deserialize a sequence of bytes previously encoded with KeyEncoding::as_ord_bytes.

pub fn first_value() -> Result<Signed, NextValueError>

Return the first value in sequence for this type. Not all types implement this.

pub fn next_value(&self) -> Result<Signed, NextValueError>

Return the next value in sequence for this type. Not all types implement this. Instead of wrapping/overflowing, None should be returned.

impl<'a> KeyEncoding<'a, Signed> for Signed

type Error = Error

The error type that can be produced by either serialization or deserialization.

pub const LENGTH: Option<usize>

The size of the key, if constant. If this type doesn’t produce the same number of bytes for each value, this should be None.

pub fn as_ord_bytes(
    &self
) -> Result<Cow<'a, [u8]>, <Signed as KeyEncoding<'a, Signed>>::Error>

Convert self into a Cow<[u8]> containing bytes that are able to be compared via memcmp in a way that is comptaible with its own Ord implementation.

impl Ord for Signed

pub fn cmp(&self, other: &Signed) -> 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.

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

Restrict a value to a certain interval.

impl PartialEq<Signed> for Signed

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

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

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

This method tests for !=.

impl PartialOrd<Signed> for Signed

pub fn partial_cmp(&self, other: &Signed) -> Option<Ordering>

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

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

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

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

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

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

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

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

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

impl Variable for Signed

pub fn encode_variable<W>(&self, output: &mut W) -> Result<usize, Error> where
    W: Write, 

Encodes self into destination, returning the number of bytes written upon success.

pub fn decode_variable<R>(input: R) -> Result<Signed, Error> where
    R: Read, 

Decodes a variable length value from source.

fn to_variable_vec(&self) -> Result<Vec<u8, Global>, Error>

Encodes self into a new Vec<u8>.

impl Copy for Signed

impl Eq for Signed

impl StructuralEq for Signed

impl StructuralPartialEq for Signed