ruby DSL : Can you pass a block to an object

Question

我对 Ruby 还很陌生，只是在探索 DSL。我想知道这在 Ruby 中是否可行，如果可行，该怎么做？

melissa = Player.new
melissa do
  on :turn do
    puts "It's my turn!"
  end

  on :win do
    puts "I win! Hahahaha"
  end
end

如果之前有人问过这个问题，请原谅。我不确定要搜索什么来解决这个问题。搜索 DSL 会产生其他结果。

Answer 1

当然可以。这是一个示例，尝试修改它:

class Player
    def initialize(&block)
        @actions = {}
        instance_eval &block
    end
    def on(action, &block)
        @actions[action] = block
    end
    def act(action)
        @actions[action].call if @actions[action]
    end
end

melissa = Player.new do
  on :turn do
    puts "It's my turn!"
  end

  on :win do
    puts "I win! Hahahaha"
  end
end

melissa.act :turn   #=> It's my turn!