ruby - 如何确定定义方法的类？

Question

我想动态确定当前方法定义的类。

这是我正在尝试做的静态示例:

class A
  def foo
    puts "I was defined in A"
  end
end

class B < A
  def foo
    puts "I was defined in B"
    super
  end
end

A.new.foo
# I was defined in A

B.new.foo
# I was defined in B
# I was defined in A  <- this is the tricky one

如何用动态表达式替换上面字符串中的A和B？

显然，#{self.class} 不起作用。 (它会为 B 打印两次 I was defined in B)

我怀疑答案是“你不能”，但也许我忽略了一些东西。

Answer 1

这个呢？

class A
  def foo
    puts "I was defined in #{Module.nesting.first}"
  end
end

class B < A
  def foo
    puts "I was defined in #{Module.nesting.first}"
    super
  end
end

根据 WandMaker 的建议进行了更正。