Re: eieio, pretty printing, and edebug

[Eric Ludlam <eric@siege-engine.com>]

On 10/28/2014 12:44 PM, Stefan Monnier wrote:
>> Line 895 in eieio.el, were it not commented out, would fix this by
>> having edebug print using the object-print generic, not prin1. I eval'ed
>> the line and tried it, and it seemed to work fine.
>
>> How come it's currently commented out? Can I open a bug for this?
>
> `defalias' is clearly not right, since it hijacks the function.  But if
> we change it to advice-add, I think it'd be OK to enable this
> edebug help.
>
> I think it would also be good to add hooks to the native printing system
> so that such tweaks can be done more reliably.  Ideally, these same
> hooks could be used for things like desktop and savehist to replace
> markers or other "non-printable" objects with alternative output.

Hi,

Related to debugging EIEIO classes, the `data-debug.el' extension which 
is a part of Emacs includes a nice way to browse large data structures. 
  In it, data-debug-eval-expression is something I've bound to M-: for 
myself.  It shows the short version of the eval'd expression when it is 
short, and goes into a browser type buffer when it is particularly large.

Eric