Sha256: 1406723ef92be1c37c1afa81d34dfbdf461b140a6ccf949decf507b40cbcf62c
Contents?: true
Size: 885 Bytes
Versions: 26
Compression:
Stored size: 885 Bytes
Contents
# frozen_string_literal: true
# require 'bundler/setup'
# require 'polyphony'
require 'fiber'
class StateMachine < ::Fiber
def initialize(state, rules)
@state = state
@rules = rules
super() { |input| state_loop(input) }
end
attr_reader :state
def state_loop(input)
loop do
@state = apply(input)
input = Fiber.yield(@state)
end
end
def apply(input)
f = @rules[@state][input]
return f.(@state) if f.is_a?(Proc)
raise 'Invalid input'
rescue => e
@state
end
def transition(input)
state = self.resume(input)
# state.is_a?(Exception) ? (raise state) : state
end
end
o = StateMachine.new(
:off,
{
off: { turnon: ->(s) { :on } },
on: { turnoff: ->(s) { :off } }
}
)
loop do
STDOUT << "#{o.state}: "
input = gets.strip.to_sym
# puts " command: #{input.inspect}"
o.transition(input)
end
Version data entries
26 entries across 26 versions & 1 rubygems