Golang八进制字符吕转utf-8编码的中文

package main

import (
    "fmt"
    "regexp"
    "strconv"
)

// 转换8进制utf-8字符串到中文
// eg: `\346\200\241` -> 怡
func convertOctonaryUtf8(in string) string {
    s := []byte(in)
    reg := regexp.MustCompile(`\\[0-7]{3}`)

    out := reg.ReplaceAllFunc(s,
        func(b []byte) []byte {
            i, _ := strconv.ParseInt(string(b[1:]), 8, 0)
            return []byte{byte(i)}
        })
    return string(out)
}

func main() {
    s1 := "\346\200\241" // 字面量
    s2 := `\346\200\241` // 原始字符串

    fmt.Println("s1 =", s1)
    fmt.Println("s2 =", s2)

    // 转化 s2
    s3 := convertOctonaryUtf8(s2)
    fmt.Println("s3 =", s3)
}