Regex 是一個 Swift 正則表達式類庫。

示例代碼：

//創(chuàng)建
// Use `Regex.init(_:)` to build a regex from a static pattern

let greeting = Regex("hello (world|universe)")

// Use `Regex.init(string:)` to construct a regex from dynamic data, and
// gracefully handle invalid input

var validations: [String: Regex]

for (name, pattern) in config.loadValidations() {
  do {
    validations[name] = try Regex(string: pattern)
  } catch {
    print("error building validation \(name): \(error)")
  }
}


//匹配
if greeting.matches("hello universe!") {
  print("wow, you're friendly!")
}