Trait Key 

pub trait Key:
    Copy
    + Default
    + Ord
    + 'static {
    // Required methods
    fn split<C: Chunk>(self) -> (Self, u32);
    fn merge<C: Chunk>(self, bit: u32) -> Self;
}

键

Required Methods

fn split<C: Chunk>(self) -> (Self, u32)

拆开键的高、低位

低位必须小于 C::BITS：

let key = 114514;
let (_, lo) = key.split::<u64>();
assert!(lo < u64::BITS);

原先大小如何，拆开后依然不变：

let k1 = 114514;
let k2 = 1919810;
assert_eq!(k1.cmp(&k2), k1.split::<u64>().cmp(&k2.split::<u64>()));

fn merge<C: Chunk>(self, bit: u32) -> Self

合并键的高、低位

怎么拆的就怎么合并回去：

let key = 114514;
let (hi, lo) = key.split::<u64>();
assert_eq!(key, hi.merge::<u64>(lo));

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Key for i8

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for i16

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for i32

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for i64

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for i128

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for isize

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for u8

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for u16

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for u32

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for u64

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for u128

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

impl Key for usize

fn merge<C: Chunk>(self, bit: u32) -> Self

fn split<C: Chunk>(self) -> (Self, u32)

Implementors