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Fx

Fx#

If you use Cats Effect and write tagless final code, and look for a generic way to construct F[A], Fx can help you.

import effectie.cats._
trait Something[F[_]] {  def get[A](a: => A): F[A]}
object Something {  def apply[F[_]: Something]: Something[F] =    implicitly[Something[F]]
  implicit def something[F[_]: Fx]: Something[F] =    new SomethingF[F]
  final class SomethingF[F[_]: Fx]    extends Something[F] {
    def get[A](a: => A): F[A] =      Fx[F].effectOf(a)  }}
import cats.effect._
val get1 = Something[IO].get(1)// get1: IO[Int] = Delay(thunk = <function0>)
get1.unsafeRunSync()// res1: Int = 1

If you feel it's too cumbersome to repeat Fx[F].effectOf(), consider using Effectful

Effectful#

If you're sick of repeating Fx[F].effectOf() and looking for more convenient ways?, use Effectful instead.

import effectie.cats.Effectful._import effectie.cats._
trait Something[F[_]] {  def get[A](a: => A): F[A]}
object Something {  def apply[F[_]: Something]: Something[F] =    implicitly[Something[F]]
  implicit def something[F[_]: Fx]: Something[F] =    new SomethingF[F]
  final class SomethingF[F[_]: Fx]    extends Something[F] {
    def get[A](a: => A): F[A] =      effectOf(a)      // No more Fx[F].effectOf(a)  }}
import cats.effect._
val get1 = Something[IO].get(1)// get1: IO[Int] = Delay(thunk = <function0>)
get1.unsafeRunSync()// res3: Int = 1