Question

作为一个个人项目，尝试通过应用它来学习Go（lang），我正在编写一个EMCAScript / JavaScript“编译器”;它（最初）所做的就是允许你包含其他.js文件。

除了功能之外，我正在试图找出regexp包裹。以下是看起来不像我想要的那样的片段：

// Note: "lines" is an array of strings.

var includeRegex, _ = regexp.Compile("^[ \t]*include[(]{1}\"([^\"]+)\"[)]{1};")
for _, line := range lines {
   var isInclude = includeRegex.Match([]byte(line))
   if isInclude {
      var includeFile = includeRegex.FindString(line)
      fmt.Println("INCLUDE", includeFile)
   } else {
      // ...
   }

我已经偶然发现了Go的正则表达式子集，因此正则表达式不能读作^\s*include\("([^"]+)"\);。我已经在RegexPal中测试了首选和Go风格的正则表达式，两者都绝对有效。这场比赛似乎永远不会发生;我做错了什么？

对于它的价值，我试图解析的include()语句看起来像这样：

include("somefile.js");

编辑：对于它的价值，我保留代码here。

Answer 1

这似乎适用于最新的每周

package main

import (
        "fmt"
        "log"
        "regexp"
        "strings"
)

func main() {
        includeRegex, err := regexp.Compile(`^\s*include\("(\\\"|[^"])+"\);`)
        if err != nil {
                log.Fatal(err)
        }

        for _, line := range strings.Split(`
foo
include "abc.def"
include("file.js");
            include "me\"to\""
            include("please\"!\"");
        nothing here          
`, "\n") {
                if includeRegex.Match([]byte(line)) {
                        includeFile := includeRegex.FindString(line)
                        fmt.Println("INCLUDE", includeFile)
                } else {
                        fmt.Printf("no match for \"%s\"\n", line)
                }
        }
}

输出：

$ go build && ./tmp 
no match for ""
no match for "foo"
no match for "include "abc.def""
INCLUDE include("file.js");
no match for "        include "me\"to\"""
INCLUDE       include("please\"!\"");
no match for "  nothing here      "
no match for ""
$

Answer 2

尝试在程序开头添加以下行：

println(runtime.Version())

它应该打印weekly.2012-03-13或接近该日期的东西。

Golang正则表达式 - 我做错了什么？

2 个答案: