Defining type alias ErrorsOrT to use liftM on EitherT instances without using a type lambda

gistfile1.txt

scala> import scalaz.syntax.id._ // for .right
import scalaz.syntax.id._

scala> import scalaz.EitherT
import scalaz.EitherT

scala> import scalaz.NonEmptyList
import scalaz.NonEmptyList

scala> import scala.concurrent.Future
import scala.concurrent.Future

scala> import scalaz.syntax.monad._ // for liftM
import scalaz.syntax.monad._

scala> import scalaz.contrib.std.scalaFuture._ // typeclass instances for Scala Future
import scalaz.contrib.std.scalaFuture._

scala> import ExecutionContext.Implicits.global // implicit execution context...you probably want a better one for real-world
import ExecutionContext.Implicits.global

scala> type ErrorsOrT[M[+_], +A] = EitherT[M, NonEmptyList[String], A] // String could be your error type of choice
defined type alias ErrorsOrT

scala> :paste
// Entering paste mode (ctrl-D to finish)

for {
  thing1 <- EitherT(Future.successful(1.right))
  thing2 <- Future.successful(2).liftM[ErrorsOrT]
} yield thing1 + thing2

// Exiting paste mode, now interpreting.

res7: scalaz.EitherT[scala.concurrent.Future,scalaz.NonEmptyList[String],Int] = scalaz.EitherTFunctions$$anon$11@45d1a86c

Lifting to Future[Error \/ A] to EitherT[Future, Error, A] can be accomplished with EitherT.eitherT().