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package jaskell.expression

import scala.util.Try

/**
 * TODO
 *
 * @author mars
 * @version 1.0.0
 * @since 2020/06/02 21:35
 */
class Sub(l: Expression, r: Expression) extends Binary(l, r) {

  override def eval(env: Env): Try[Double] = for {
    lv <- left eval env
    rv <- right eval env
  } yield {
    lv - rv
  }

  override def priority: Int = 1
}