正则表达式的字符串扩展 简体中文

.package(url:"https://github.com/PerfectSideRepos/Perfect-RegEx.git", from: "3.1.0")

... 
dependencies: ["Regex"]

import Regex

var source = "there is a bloody bad bread on my bed."

let ranges = source.match(pattern: "b[a-z]+d")

// it will figure out the range of `blood`, `bad` `bread` and `bed`
let found:[String] = ranges.map { String(source[$0]) }
print("found", found)


// you can do further operations, such as remove:
source.removeSubrange(ranges[0])

print(source)
// the result should be:
// there is a y bad bread on my bed.

extension String {
	/// test if the string contains certain pattern
 	/// - parameters:
 	///   - pattern: string to recognize
 	/// - return: true for found
  public func contains(pattern: String) -> Bool

  /// find string ranges
  /// - parameters:
  ///   - pattern: string to recognize
  /// - return: a string range array
  public func match(pattern: String) -> [Range<String.Index>]
}