trait Parsers

Parsers.scala

trait Parsers {
  type Elem
  type Input = Reader[Elem]

  sealed abstract class ParseResult[+T] {
    ...
  }
  case class Success[+T](result: T, override val next: Input) extends ParseResult[T] {
    ...
  }
  sealed abstract class NoSuccess(val msg: String, override val next: Input) extends ParseResult[Nothing] {
    ...
  }
  case class Failure(override val msg: String, override val next: Input) extends NoSuccess(msg, next) {
    ...
  }
  case class Error(override val msg: String, override val next: Input) extends NoSuccess(msg, next) {
    ...
  }

  def Parser[T](f: Input => ParseResult[T]): Parser[T] = ...

  abstract class Parser[+T] extends (Input => ParseResult[T]) {
    ...
  }
}