The following reply was made to PR libstdc++/10783; it has been noted by GNATS.

From: Paolo Carlini <pcarlini@unitus.it>
To: gcc-prs@gcc.gnu.org,  Sylvain.Pion@mpi-sb.mpg.de,  ncm@cantrip.org, 
 gcc-bugs@gcc.gnu.org,  gcc-gnats@gcc.gnu.org,  nobody@gcc.gnu.org
Cc:  
Subject: Re: libstdc++/10783: std::vector::reverse_iterator  could be smaller
Date: Sun, 18 May 2003 21:35:50 +0200

 Well, on second thought, and giving justice to the clear
 explanation in V&J, in their §16.2.2 it is clearly stated
 that the EBCO has no equivalent for data members: this is
 reasonable considering that it would create problems with
 the representation of pointers to members.
 
 Therefore reverse_iterator is expected to have the same
 size of its iterator empty base (thanks to EBCO) + the size
 of its member current, that is two times the size of a
 plain iterator.
 
 Do you agree?
 
 Paolo.
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10783