pub trait FromBytes: Sized {
    type Bytes: NumBytes + ?Sized;

    // Required methods
    fn from_be_bytes(bytes: &Self::Bytes) -> Self;
    fn from_le_bytes(bytes: &Self::Bytes) -> Self;

    // Provided method
    fn from_ne_bytes(bytes: &Self::Bytes) -> Self { ... }
}

Required Associated Types§

Required Methods§

source

fn from_be_bytes(bytes: &Self::Bytes) -> Self

Create a number from its representation as a byte array in big endian.

Examples
use num_traits::FromBytes;

let value: u32 = FromBytes::from_be_bytes(&[0x12, 0x34, 0x56, 0x78]);
assert_eq!(value, 0x12345678);
source

fn from_le_bytes(bytes: &Self::Bytes) -> Self

Create a number from its representation as a byte array in little endian.

Examples
use num_traits::FromBytes;

let value: u32 = FromBytes::from_le_bytes(&[0x78, 0x56, 0x34, 0x12]);
assert_eq!(value, 0x12345678);

Provided Methods§

source

fn from_ne_bytes(bytes: &Self::Bytes) -> Self

Create a number from its memory representation as a byte array in native endianness.

As the target platform’s native endianness is used, portable code likely wants to use from_be_bytes or from_le_bytes, as appropriate instead.

Examples
use num_traits::FromBytes;

#[cfg(target_endian = "big")]
let bytes = [0x12, 0x34, 0x56, 0x78];

#[cfg(target_endian = "little")]
let bytes = [0x78, 0x56, 0x34, 0x12];

let value: u32 = FromBytes::from_ne_bytes(&bytes);
assert_eq!(value, 0x12345678)

Implementations on Foreign Types§

source§

impl FromBytes for u128

source§

impl FromBytes for i128

source§

impl FromBytes for usize

source§

impl FromBytes for u64

source§

impl FromBytes for u16

source§

impl FromBytes for isize

source§

impl FromBytes for f64

source§

impl FromBytes for u8

§

type Bytes = [u8; 1]

source§

fn from_be_bytes(bytes: &<u8 as FromBytes>::Bytes) -> u8

source§

fn from_le_bytes(bytes: &<u8 as FromBytes>::Bytes) -> u8

source§

fn from_ne_bytes(bytes: &<u8 as FromBytes>::Bytes) -> u8

source§

impl FromBytes for i8

§

type Bytes = [u8; 1]

source§

fn from_be_bytes(bytes: &<i8 as FromBytes>::Bytes) -> i8

source§

fn from_le_bytes(bytes: &<i8 as FromBytes>::Bytes) -> i8

source§

fn from_ne_bytes(bytes: &<i8 as FromBytes>::Bytes) -> i8

source§

impl FromBytes for i16

source§

impl FromBytes for f32

source§

impl FromBytes for i64

source§

impl FromBytes for i32

source§

impl FromBytes for u32

source§

impl FromBytes for BigUint

source§

impl FromBytes for BigInt

Implementors§