用于定义方法的 Ruby 钩子? [英] Ruby hook for method defined?

问题描述

我一直在谷歌上搜索这个问题，但没有找到答案，这让我觉得答案是否定的，但我想我会在这里问，以防万一有人确切知道.

I've been googling around for this and haven't been able to find an answer, which makes me think the answer is no, but I figured I'd ask here in case anyone knows for sure.

Ruby 是否有一个钩子来定义方法(即在模块或类上)?

Does Ruby have a hook for when methods are defined (ie on a module or class)?

如果没有，是否有人对 main 对象的实现足够熟悉，知道在顶级定义时它是如何将方法复制到 Object 的?

If not, is anyone familiar enough with the implementation of the main object to know how exactly it copies methods to Object when they're defined at the top level?

对这个真的很好奇.感谢您提供任何信息:)

Really curious about this. Thanks for any info :)

推荐答案

确实如此.Module#method_Added https://ruby-doc.org/core-2.2.2/Module.html#method-i-method_ added

module Thing
  def self.method_added(method_name)
    puts "Thing added #{method_name}"
  end
  def self.a_class_method; end
  def do_something; end
end

class Person
  def self.method_added(method_name)
    puts "I added #{method_name}"
  end
  attr_accessor :name 
end

Thing
Person.new 

# Thing added do_something
# I added name
# I added name=

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