整型的相关 bit 操作，如：

rust use erg_bits::BitsOps; use erg_bits::IntoBits; assert_eq!(0u8.bits(0).set(), 0x01); assert_eq!(0u8.bits(1).set(), 0x02); assert_eq!(0u8.bits(4..=7).set(), 0xf0); assert_eq!(0xffu8.bits(4..=7).clr(), 0x0f); assert_eq!(0xffu8.bits(3).revert(), 0xf7); assert_eq!(0xffu8.bits(4..=7).revert(), 0x0f); assert_eq!(0u8.bits(4..=7).write(0x10), 0x0); // 只会写入 value 的相应的 bit 位。低 4 bit 并不会被修改。 assert_eq!(0u8.bits(4..=7).write(0x12), 0x20); assert_eq!(0x12u8.bits(4..=7).read(), 0x1);

在 BitsOps 接口的基础上添加了结构体 bit 字段相关的接口，以及辅助实现的宏：

```rust use ergbits::field::BufferWriter; use ergbits::field::BufferReader; use ergbits::IntoBits; use ergbits::BitsOps;

pub struct FoolData { data: u32, data1: u32, } impl BufferWriter for FoolData{} impl BufferReader for FoolData{}

// bit 字段 1，其余类推 pub struct Flag1; pub struct Flag2; pub struct Flag3; pub struct Flag4; pub struct Flag5; pub struct Flag6;

bits::fields! { FoolData [data] { Flag1 [0..=3, rw, u32], Flag2 [4..=5, rw, u32], Flag3 [6, ro, bool], Flag4 [7, rw, bool], Flag5 [8..=9, rw, bool] { inputconverter: |x| match x { true => 0x1, _ => 0x0 }; outputconverter: |x| match x { 0x1 => true, _ => false } } } FoolData [data1] { Flag6 [0..=3, rw, u32] } } let mut fool = FoolData {data:0x0, data1: 0x0}; fool.write::(0xf); assert_eq!(fool.data, 0xf);

fool.write::(0x3); asserteq!(fool.data, 0b00111111);

// error: the trait FieldWriter<FoolData> is not implemented for Flag3 // fool.write::(true); // Flag3 is not writeable

fool.write::(true); asserteq!(fool.data, 0b10111111);

let flag3 = fool.read::(); assert_eq!(flag3, false);

let flag4 = fool.read::(); assert_eq!(flag4, true);

fool.data = fool.data.bits(8..=9).write(0x2); // set fool.data bits 8..=9 to 0x2 assert_eq!(false, fool.read::()); // bits: 8..=9 equal to 0x2 which is false

fool.write::(true); assert_eq!(0b01, fool.data.bits(8..=9).read());

// bit 位迭代器 for bit in 0x55u8.bits() { print!("{}", bit.is_set()); } ```