sbt/tasks/Node.scala

/* sbt -- Simple Build Tool
 * Copyright 2010 Mark Harrah
 */
package sbt

import Types._

/** Represents a task node in a format understood by the task evaluation engine Execute.
*
* @tparam A the task type constructor
* @tparam T the type computed by this node */
trait Node[A[_], T]
{
	type K[L[x]]
	val in: K[A]
	val alist: AList[K]

	/** Computes the result of this task given the results from the inputs. */
	def work(inputs: K[Result]): Either[A[T], T]
}