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rubydebuggingproxy-classespry

binding.pry in BasicObject

pry would be great for debugging a subclass of BasicObject !

https://github.com/pry/pry says that pry has: "Exotic object support (BasicObject instances..."

But how to do that? As can be expected a BasicObject does not understand binding.

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

When method_missing is invoked, where to send binding?

Solution

  • You'll need to directly call the binding method on Kernel like this:

    [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>