LocalDateTime

Type name	example
LocalDateTime	2000-12-31T11:21:19

import com.github.gekomad.regexcollection.Validate.validate
import java.time.LocalDateTime    
assert(validate[LocalDateTime]("2000-12-31T11:21:19") == Some("2000-12-31T11:21:19"))

Custom pattern

import com.github.gekomad.regexcollection.Validate.validate
import java.time.LocalDateTime
import com.github.gekomad.regexcollection.Collection.Validator
import java.time.format.DateTimeFormatter

implicit val validator = 
  Validator[LocalDateTime]((a: String) => scala.util.Try(LocalDateTime.parse(a, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.0"))).toOption.map(_ => a))

assert(validate[LocalDateTime]("2000-12-31 11:21:19.0") == Some("2000-12-31 11:21:19.0"))