Go (RE2)

Windows File Path in GO

Matches absolute Windows file paths (e.g., C:\Users\file.txt).

Try it in the GO tester →

Pattern

regexGO
^[A-Za-z]:\\(?:[^\\/:*?"<>|\r\n]+\\)*[^\\/:*?"<>|\r\n]*$

Go (RE2) code

goGo
package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`^[A-Za-z]:\\(?:[^\\/:*?"<>|\r\n]+\\)*[^\\/:*?"<>|\r\n]*$`)
	input := `C:\Users\John\file.txt`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

How the pattern works

`^[A-Za-z]:\\` matches the drive letter and root backslash. `(?:[^\\/:*?"<>|\r\n]+\\)*` matches directory segments. Final segment (the file or folder name) is allowed to be empty.

Examples

Input

C:\Users\John\file.txt

Matches

  • C:\Users\John\file.txt

Input

D:\

Matches

  • D:\

Input

/unix/path

No match

—

Same pattern, other engines

JavaScript / ECMAScript

Supported

See how this pattern looks (and behaves) in JavaScript's built-in RegExp.

Python (re)

Supported

See how this pattern looks (and behaves) in Python's stdlib `re` module.

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