Enum NumEncoding 

#[non_exhaustive]
pub enum NumEncoding {
    Fixed,
    Leb128,
    ProtobufWasteful,
    ProtobufZigzag,
}

Controls the encoding of a numerical value. For instance, controls whether the numbers are compressed through a var-int format or if the entire length of their value is encoded.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Fixed

The value’s bits are encoded as-is according to the Endianness.

Leb128

The value’s bits are encoded according to the ULEB128 (Little Endian Base 128) standard if unsigned, or LEB128 standard if signed.
As the name suggests, the bytes are encoded in little endian order, ignoring the Endianness.

ProtobufWasteful

The value’s bits are encoded according to Protobuf’s varint encoding, where unsigned values are encoded in the same way as Leb128, and signed values are encoded as a reinterpret-cast of the bits to unsigned, possibly wasting all the var-int length to encode the leading 1s.
This encoding method is not ideal to encode negative numbers and is provided merely for compatibility concerns.
The bytes are encoded in little endian order, ignoring the Endianness.

ProtobufZigzag

The value’s bits are encoded according to Protobuf’s varint encoding, where unsigned values are encoded in the same way as Leb128, and signed values are encoded as an unsigned value with its least significant bit carrying the sign.
The bytes are encoded in little endian order, ignoring the Endianness.

Implementations

impl NumEncoding

pub const fn borrowable(&self) -> bool

Determines whether a slice encoded with this encoding can be directly borrowed.

Currently only returns true with the Fixed variant

Trait Implementations

impl Clone for NumEncoding

fn clone(&self) -> NumEncoding

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NumEncoding

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

Formats the value using the given formatter.

impl Default for NumEncoding

fn default() -> NumEncoding

Returns the “default value” for a type.

impl Display for NumEncoding

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

Formats the value using the given formatter.

impl Hash for NumEncoding

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 PartialEq for NumEncoding

fn eq(&self, other: &NumEncoding) -> 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 Copy for NumEncoding

impl Eq for NumEncoding

impl StructuralPartialEq for NumEncoding