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• IsCaseClass.scala

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org.specs2.matcher.describe.IsCaseClass.scala Maven / Gradle / Ivy

package org.specs2.matcher.describe

import org.specs2.reflect.MacroContext._

/** proof that a type T is a case class */
final class IsCaseClass[T]

object IsCaseClass {

  def checkCaseClassMacro[T : ctx.WeakTypeTag](ctx: Context): ctx.Expr[IsCaseClass[T]] = {
    val T = ctx.weakTypeOf[T]
    if (!T.typeSymbol.isClass || !T.typeSymbol.asClass.isCaseClass)
      ctx.error(ctx.enclosingPosition, s"$T does not have case modifier")

    import ctx.universe._
    ctx.Expr[IsCaseClass[T]](q"new _root_.org.specs2.matcher.describe.IsCaseClass[$T]")
  }

  implicit def checkCaseClass[T]: IsCaseClass[T] =
    macro checkCaseClassMacro[T]

}