.13.e3.source-code.solve.scala Maven / Gradle / Ivy

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/*
   Copyright 2010 Aaron J. Radke

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
package cc.drx.exp
import cc.drx._

/***experimental*/
object Solve {
  trait Hole 
  case object ? extends Hole
  case object X extends Hole

  trait Solve{
    def unapply(res:Double):Option[Double]

    //TODO try using pattern matching is a much clearer mechanism
    def ===(res:Double):Double = unapply(res).get
  }

  implicit class RichDouble(x:Double) {
    def **(hole:Hole):Log = Log(x)
    def *(hole:Hole):Mul = Mul(x)
    def ===(solve:Solve):Double = solve === x
  }
  implicit class RichInt(x:Int) extends RichDouble(x.toDouble)
  implicit class RichLong(x:Long) extends RichDouble(x.toDouble)

  case class Log(base:Double) extends Solve{
    def unapply(res:Double):Option[Double] = Some(res.log(base))
  }
  case class Mul(base:Double) extends Solve{
    def unapply(res:Double):Option[Double] = Some(res/base)
  }
}