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/*
 * Copyright (c) 2020 Simer JS Plaha ([email protected] - @simerplaha)
 *
 * This file is a part of SwayDB.
 *
 * SwayDB is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * SwayDB is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with SwayDB. If not, see .
 *
 * Additional permission under the GNU Affero GPL version 3 section 7:
 * If you modify this Program or any covered work, only by linking or
 * combining it with separate works, the licensors of this Program grant
 * you additional permission to convey the resulting work.
 */

package swaydb.data.util

private[swaydb] sealed trait TupleOrNone[+L, +R] extends SomeOrNoneCovariant[TupleOrNone[L, R], TupleOrNone.Some[L, R]] {
  override def noneC: TupleOrNone[Nothing, Nothing] = TupleOrNone.None
}

private[swaydb] object TupleOrNone {
  final object None extends TupleOrNone[Nothing, Nothing] {
    override def isNoneC: Boolean = true
    override def getC: Some[Nothing, Nothing] = throw new Exception("Tuple is of type Null")
  }

  case class Some[+L, +R](left: L, right: R) extends TupleOrNone[L, R] {
    override def isNoneC: Boolean = false
    override def getC: Some[L, R] = this
  }
}