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abstracted: forget your instance methods

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package io.travisbrown.abstracted.internal

import scala.reflect.ClassTag

private[abstracted] trait MacrosCompat {
  type Context = scala.reflect.macros.Context

  def resultType(c: Context)(tpe: c.Type)(implicit
    /**
     * See SI-5143 for discussion of why we need this class tag.
     */
    tag: ClassTag[c.universe.MethodType]
  ): c.Type = {
    import c.universe.MethodType

    tpe match {
      case MethodType(_, res) => resultType(c)(res)
      case other => other
    }
  }

  def implicitViews(c: Context)(source: c.Type)(implicit
    /**
     * See SI-5143 for discussion of why we need this class tag.
     */
    tag: ClassTag[c.universe.TypeRef]
  ): List[c.Tree] = {
    import c.universe.{ EmptyTree, TypeRef }

    c.enclosingImplicits.collect {
      case (TypeRef(_, _, _ :: target :: _), _) =>
        c.inferImplicitView(EmptyTree, source, target)
    }.filterNot(_.isEmpty)
  }
}