shved
/ run_state.rb
Created
February 17, 2019 10:25
— forked from flash-gordon/run_state.rb
This shows that implementation of state effects doesn't require mutation. This example uses recursion that can be optimized after enabling TCO
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| require 'fiber' | |
| class RunState | |
| def call(fiber, state = {}, *xs) | |
| result = fiber.resume(*xs) | |
| if fiber.alive? | |
| op, *args = result | |
| case op | |
| when :read |