iterator derived from constiterator or not?

From: Alexander Stippler (stip_at_mathematik.uni-ulm.de)
Date: 12/30/03 

Date: Tue, 30 Dec 2003 21:53:21 +0100

Hello,

some projects define their iterator classes by deriving the non-const
iterator from const-iterator. Most projects don't. Does anything speak
against deriving or is it just a matter of taste?

regards,
        alex