英文:
Golang Regular Expressions - what am I doing incorrectly?
问题
作为一个个人项目，我试图通过将其应用于某些东西来学习Go（lang），我正在编写一个EMCAScript/JavaScript“编译器”；它最初只会允许您包含其他.js文件。
除了功能之外，我正在努力弄清楚regexp包。这是一个似乎不按我所希望的方式工作的代码片段：
// 注意：“lines”是一个字符串数组。
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 {
// ...
}
}
我已经遇到了Go的正则表达式子集，这就是为什么正则表达式不会读取为^\s*include\("([^"]+)"\);的原因。我已经在RegexPal中测试了首选和Go风格的正则表达式，两者都有效。匹配似乎从未发生过；我做错了什么？
值得一提的是，我正在尝试解析的include()语句如下所示：
include（“somefile.js”）;
编辑：值得一提的是，我将代码保留在此处。
英文:
As a personal project, trying to learn Go(lang) by applying it to something, I am writing an EMCAScript/JavaScript "compiler"; all it will (initially) do is allow you to include other .js files.
Functionality aside, I am pulling my hair out trying to figure out the regexp package. Here is the snippet that does not seem to be doing what I want it to:
// 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 {
// ...
}
I have already stumbled across Go's subset of regular expressions, hence why the regex does not read as ^\s*include\("([^"]+)"\);. I have already tested both the preferred, and the Go-style regex, in RegexPal, and both definitely work. The match just never seems to occurr; what am I doing wrong?
For what it's worth, the include() statement I am trying to parse looks like so:
include("somefile.js");
EDIT: For what it's worth, I am keeping the code here.
答案1
得分: 1
这似乎适用于最新的每周版本
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 ""
$
英文:
This seems to work with the latest weekly
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)
}
}
}
Output:
$ 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 ""
$
答案2
得分: 1
尝试将以下行放在程序的开头：
println(runtime.Version())
它应该打印出weekly.2012-03-13或接近该日期的内容。
英文:
Try putting the following line at the start of your program:
println(runtime.Version())
It should print weekly.2012-03-13 or something close to that date.
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