Purely functional streams, implemented with algebraic effects and handlers.
- ⚗️ 🔬 🧪 𝑷𝑹𝑶𝑻𝑶𝑻𝒀𝑷𝑬 🚧 WIP 🚧
- Uses Scala 3.
- Uses Turbolift as effect system.
- Inspired by Stream from Unison language.
Runnable with scala-cli.
Important
Turbolift requires Java 11 or newer.
//> using scala "3.3.5"
//> using dep "io.github.marcinzh::beam-core:0.12.0"
//> using dep "io.github.marcinzh::turbolift-bindless:0.112.0"
package examples
import turbolift.!!
import turbolift.effects.Console
import turbolift.bindless._
import beam._
/** Stuttering Fibonacci sequence: when the number is even, emit it twice. */
@main def ex01_sourceEffect =
val stream: Stream[Long, Any] =
Source: fx =>
def loop(a: Long, b: Long): Unit !! fx.type =
`do`:
fx.emit(a).!
if a % 2 == 0 then fx.emit(a).!
loop(b, a + b).!
loop(1, 1)
stream
.take(20)
.foreachEff(i => Console.println(i.toString))
.handleWith(Console.handler)
.runIOSee also examples folder.