• Home
• com.stripe
• scrooge-shapes_2.11
• 0.1.0
• source code
• GenericInstances.scala

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

com.stripe.scrooge.shapes.GenericInstances.scala Maven / Gradle / Ivy

package com.stripe.scrooge.shapes

import scala.language.experimental.macros
import shapeless.{Annotations, Default, DefaultSymbolicLabelling, Generic, HNil}

trait GenericInstances {
  implicit def deriveGeneric[A]: Generic[A] = macro GenericMacros.materializeGeneric[A]
  implicit def deriveDefaultSymbolicLabelling[A]: DefaultSymbolicLabelling[A] =
    macro GenericMacros.materializeDefaultSymbolicLabelling[A]

  /**
   * Derive an empty default case class values type class instance.
   *
   * @note We do not currently provide the default values from the Scrooge
   * struct definitions. This could be supported in a future release, but is
   * non-trivial and not necessary for any of our current use cases.
   */
  implicit def deriveDefault[A]: Default[A] = macro GenericMacros.materializeDefault[A]

  /**
   * Derive an empty annotations type class instance.
   *
   * @note We do not currently support annotation values for Scrooge struct
   * definitions.
   */
  implicit def deriveAnnotations[A, T]: Annotations.Aux[A, T, HNil] =
    macro GenericMacros.materializeAnnotations[A, T]
}