从[]个字节中删除C样式的注释

Question

all. I'm trying to write a wrapper for a particular type of config file, which is JSON encoded. Unfortunately, this file contains C-style comments, (// and /* */,) and these cause errors in json.Unmarshal. Is there a way force Unmarshal to ignore these comments, or otherwise remove them easily?

I'm looking into regexp now, but I'm hoping there's an elegant solution that I, as a beginner in Go, might not be able to come up with in the course of a few minutes.

Answer 1

You'll have to strip out the comments, as the JSON specification does not allow comments. A regular expression can do the job.

package main

import (
    "fmt"
    "regexp"
)

var bytes = []byte(`// this is a line comment
this is outside the comments
/* this
   is
   a
   multi-line
   comment */`)

func main() {
    re := regexp.MustCompile("(?s)//.*?
|/\\*.*?\\*/")
    newBytes := re.ReplaceAll(bytes, nil)
    fmt.Println(string(newBytes))
}