matching2.swift

import RegexBuilder

let regex = Regex {
    "Hi, WWDC"
    Repeat(.digit, count: 2)
    "!"
}

let input = "Hi, WWDC21! Hi, WWDC22! Hi Hello"

let firstMatch: Regex.Match? = input.firstMatch(of: regex)
print("First Matched: \(firstMatch?.output)")
// First Matched: Optional("Hi, WWDC21!")

let wholeMatch: Regex.Match? = input.wholeMatch(of: regex)
print("Whole Matched: \(wholeMatch?.output)")
// Whole Matched: nil

let matches: [Regex.Match] = input.matches(of: regex)
print("Matched: \(matches.map { $0.output })")
// Matched: ["Hi, WWDC21!", "Hi, WWDC22!"]