请问go标准库里面有没有对一个uint32某几个bit更改或者移位的package？

试一试math/bits

我直接混进去汇编的代码

https://www.baidu.com/s?ie=UTF-8&wd=golang%20%E7%A7%BB%E4%BD%8D%E6%93%8D%E4%BD%9C

import ( "log" "unsafe" ) func main() { var src uint32 = 20 var val byte = 0 for i := uintptr(0); i < unsafe.Sizeof(src); i++ { (byte)(unsafe.Pointer(i + uintptr(unsafe.Pointer(&src)))) = val log.Printf("Set %v at %v", val, i+uintptr(unsafe.Pointer(&src))) } log.Println(uintptr(unsafe.Pointer(&src)), src) }

import (
    "log"
    "unsafe"
)
func main() {
    var src uint32 = 20
    var val byte = 0
    for i := uintptr(0); i < unsafe.Sizeof(src); i++ {
        *(*byte)(unsafe.Pointer(i + uintptr(unsafe.Pointer(&src)))) = val
        log.Printf("Set %v at %v", val, i+uintptr(unsafe.Pointer(&src)))
    }
    log.Println(uintptr(unsafe.Pointer(&src)), src)
}

for里面你可以自由发挥，想赋值给哪位就哪位，玩完了重新按uint32读取就是了。