kantan.xpath.scalaz.package.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of kantan.xpath-scalaz_2.10 Show documentation

scalaz

There is a newer version: 0.2.0

Show newest version

/*
 * Copyright 2016 Nicolas Rinaudo
 *
 * 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 kantan.xpath

import _root_.scalaz._
import kantan.codecs.scalaz.ScalazInstances

package object scalaz extends ScalazInstances {
  // - Equal instances for errors --------------------------------------------------------------------------------------
  // -------------------------------------------------------------------------------------------------------------------
  implicit val compileErrorEq: Equal[CompileError] = Equal.equalA[CompileError]
  implicit val readErrorEq: Equal[ReadError] = Equal.equalA[ReadError]
  implicit val decodeErrorEq: Equal[DecodeError] = Equal.equalA[DecodeError]
  implicit val parseErrorEq: Equal[ParseError] = Equal.equalA[ParseError]



  // - Misc. instances -------------------------------------------------------------------------------------------------
  // -------------------------------------------------------------------------------------------------------------------
  /** `Contravariant` instance for `XmlSource`. */
  implicit val xmlSource = new Contravariant[XmlSource] {
    override def contramap[A, B](fa: XmlSource[A])(f: B ⇒ A) = fa.contramap(f)
  }

  implicit val queryMonad: Monad[Query] = new Monad[Query] {
    override def point[A](a: ⇒ A) = Query(_ ⇒ a)
    override def bind[A, B](fa: Query[A])(f: (A) => Query[B]) = fa.flatMap(f)
    override def map[A, B](fa: Query[A])(f: A => B) = fa.map(f)
    }
}