Re: Issue 5336: Remove downcasting methods from Grob_array and Grob_info (issue 344010043 by address@hidden)

[nine . fierce . ballads]

To summarize, the principle I advocate is to establish early what kind
of object you are dealing with, and once you have paid for that
information, retain it as long as you can.  In LilyPond it seems I often
see the opposite: casts in the lowest depths of the code.

Regards,
Dan

https://codereview.appspot.com/344010043/