获取* uint8指向字符串中第一个字符的指针

Question

I am trying to port a hash function from C to Go using unsafe.Pointer. I need to get the pointer to the first character of the key string.

I tried &(hello[0]) and &hello[0] and failed.

Answer 1

In golang string it's a massive of bytes, need convert string to rune

package main

import (
    "fmt"
)

func test(r *rune) {
    *r = rune('L')
}

func main() {
    s := []rune("Hello")
    fmt.Println(string(s))
    fmt.Println(&s[0])
    test(&s[0])
    fmt.Println(string(s))
}

Example playground golang