lazy-regex.kt

package voice.bookOverview.views

import voice.bookOverview.views.RegexType.Email

enum class RegexType(
  // language=RegExp
  internal val regex: String
) {
  Email(".*?"),
  Name("(.*)")
}

private val regexCache = mutableMapOf<RegexType, Regex>()

operator fun Regex.Companion.get(type: RegexType): Regex {
  return regexCache.getOrPut(type) {
    type.regex.toRegex()
  }
}

fun main() {
  Regex[Email].findAll("mail@sth.de")
}