Xref: utzoo comp.lang.c++:10304 comp.std.c++:408
Path: utzoo!attcan!uunet!munnari.oz.au!comp.vuw.ac.nz!actrix!Bruce.Hoult
From: Bruce.Hoult@actrix.co.nz (Bruce Hoult)
Newsgroups: comp.lang.c++,comp.std.c++
Subject: Re: const is not object-oriented
Message-ID: <1990Nov10.184521.2872@actrix.co.nz>
Date: 10 Nov 90 18:45:21 GMT
References: <1990Nov9.181408.23110@odin.corp.sgi.com>
Organization: Actrix Public Access UNIX, Wellington, New Zealand
Lines: 6
Comment-To: linton@sgi.com

>If you implement this caching strategy, you can no longer make sum
>a const member function!
 
I think this is a clear case of the programmer knowing better than the
compiler and being justified in using a cast of "this" to IntVector* in
sum() at the point at which sum_is_valid is changed.