sbt.internal.util.appmacro.MixedBuilder.scala Maven / Gradle / Ivy

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Util module for sbt

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package sbt.internal.util
package appmacro

import scala.reflect._
import macros._

/**
 * A builder that uses `TupleN` as the representation for small numbers of inputs (up to `TupleNBuilder.MaxInputs`)
 * and `KList` for larger numbers of inputs. This builder cannot handle fewer than 2 inputs.
 */
object MixedBuilder extends TupleBuilder {
  def make(c: Context)(mt: c.Type, inputs: Inputs[c.universe.type]): BuilderResult[c.type] =
    {
      val delegate = if (inputs.size > TupleNBuilder.MaxInputs) KListBuilder else TupleNBuilder
      delegate.make(c)(mt, inputs)
    }
}