module Mealy

A Mealy finite state machine.

For usage information please read {file:README.md README}.

Constants

ANY: Wildcard for machine input tokens that match anything.

Public Class Methods

included(klass) click to toggle source

@private Module.included hook. Resets the state transitions for a class

# File lib/mealy/dsl.rb, line 56
def self.included(klass)
  klass.class_eval { @transitions = Hash.new { Hash.new({}) } }
  klass.extend(DSL)
end

Public Instance Methods

emit(token) click to toggle source

emit tokens from the DSL blocks @param token the emitted token

# File lib/mealy.rb, line 19
def emit(token)
  return unless @emit_runner
  @emit_runner.emit(token)
end

execute(enum) click to toggle source

Runs the Mealy machine on the given input. @param enum [Enumerable] the input for the FSM @return the return value of the {Mealy::DSL#finish} block.

# File lib/mealy.rb, line 40
def execute(enum)
  Executer.new(self).run(enum)
end

run(enum, &block) click to toggle source

Runs the Mealy machine on the given input. Outputs a stream of tokens by yielding each emitted token to the given block. @param enum [Enumerable] the input for the FSM @return [Enumerator] if no block is given @yieldparam emit The user token emitted by {#emit}.

# File lib/mealy.rb, line 29
def run(enum, &block)
  return to_enum(:run, enum) unless block_given?

  @emit_runner = Runner.new(self)
  @emit_runner.run(enum, &block)
  @emit_runner = nil
end