Composable effects

This is an experiment with composable effects and effectful programs. It's basically algebraic effects and handlers, using generators as the underlying implementation of continuations.

Try it

node -r babel-register ./examples/delay

node -r babel-register ./examples/async-problem/index ./examples/async-problem/input

Highlights

• Separation of effect interfaces and implementations: program with interfaces, supply effect implementations when running programs.
• Composable effects: create new effects from existing ones.
• Composable programs: yield * can be used to compose effectful programs.
• Asynchronous effects with cancelation.

Inspiration

• Koka
• Eff
• Scala Effekt
• Creed's coroutine implementation