Trait BitstructFromValue

Source

pub unsafe trait BitstructFromValue {
    type StoreType;

    const BIT_WIDTH: u32;

    // Required method
    unsafe fn from_value(value: Self::StoreType) -> Self;
}

Expand description

A trait that must be implemented for non-inline field enum types. 非内联的字段枚举类型必须实现的trait。

It is recommended to use the bitstruct_field_enum macro to generate non-inline field enum types instead of implementing them manually.

推荐使用bitstruct_field_enum宏来生成非内联的字段枚举类型。而不是手动实现。

use bitstructs::{bitstruct_field_enum};
#[bitstruct_field_enum(2)]
pub enum TwoBitEnum {
    Zero = 0,
    One = 1,
    Two = 2,
    Three = 3,
}

§Safety

Must be able to handle all values from 0 to 2.pow(BIT_WIDTH) - 1.
Must implement both BitstructToValue and BitstructFromValue.
The StoreType must be the smallest unsigned integer type that can contain all possible values, which can be one of u8, u16, u32, u64, or u128.
The operations of BitstructFromValue::from_value and BitstructToValue::to_value must be inverse of each other.
The BIT_WIDTH of BitstructFromValue and BitstructToValue must be the same.
必须能处理 0 到 2.pow(BIT_WIDTH) - 1 的所有取值。
必须同时实现BitstructToValue和BitstructFromValue。
StoreType必须是能包含所有可能取值范围的最小的无符号整数类型，可使用u8,u16,u32,u64,u128。
BitstructFromValue::from_value和BitstructToValue::to_value必须是互为逆操作。
BitstructFromValue和BitstructToValue的BIT_WIDTH必须相同。