ruby - BasicObject 中的 binding.pry

Question

pry 非常适合调试 BasicObject 的子类!

https://github.com/pry/pry说 pry 有:“奇异对象支持(BasicObject 实例...”

但是要怎么做呢？正如所料，BasicObject 不理解绑定(bind)。

 NameError:
   undefined local variable or method `binding' for #<C30Course:0xbefbc0c>

当调用 method_missing 时，将绑定(bind)发送到哪里？

Answer 1

您需要像这样在Kernel 上直接调用binding 方法:

[13] pry(main)> class O < BasicObject
              |   def hi
              |     x = 10
              |     ::Kernel.binding.pry
              |   end  
              | end  
=> nil
[14] pry(main)> O.new.hi

From: (pry) @ line 19 O#hi:

    17: def hi
    18:   x = 10
 => 19:   ::Kernel.binding.pry
    20: end

[1] pry(unknown)> x
=> 10
[2] pry(unknown)> self
=> #<O:0x3fd5310d04f8>