RE: [GD-General] Overhead of RTTI

[Grills, J. <jg...@so...>]

I think it's a good general rule.  I never said it was an absolute, mind
you, just a general rule.  My experience with game programmers is that MI is
most often misused.  Sure, it has appropriate applications, but I'd bet at
least 90% of the MI use in our game is ill-founded.

Actually, it's funny that you mention templates.  We are seriously debating
a rule about templated classes in headers requiring lead permissions as
well.  They substantially increase build times, dependencies, and a host of
other evil problems.  In fact, we just ran into a problem where MSVC 6's PDB
format is limited to 64mb, and one of our largest applications will no
longer link with full debugging information because of it.  I've done some
analysis of the PDB contents, and about 27mb of that are text strings
containing symbol names with "_STL" in them.  Unless compiler/linker support
for templates improves significantly, I really think that one day in the
future, we'll look back on C++, templates and the STL and say, "What in the
hell were we thinking?!?".

And yes, we have a large team of 13 programmers.

j

-----Original Message-----
From: Noel Llopis [mailto:ll...@co...]
Sent: Tuesday, December 24, 2002 8:04 AM
To: gam...@li...
Subject: Re: [GD-General] Overhead of RTTI



On Tue, 24 Dec 2002 05:54:49 -0800
"Grills, Jeff" <jg...@so...> wrote:

> And, as a general rule, multiple inheritance is evil and should be
avoided.

Whoa! Talk about an overblown general statement!

I would say that multiple inheritance definitely has its place, in
particular inheritance of abstract interfaces.

> In fact, we've recently put a rule in place where any use of multiple
> inheritance requires a lead programmer's permission before submitting to
> source control.

Do you have similar rules about using templates? What about classes
that exceed 1000 lines of code? Both of those situations seem more
potentially dangerous to me than using multiple inheritance. Just
curious.

Of course, on the other hand, in a large team it might be a good idea if
before checking in any new classes or adding any new dependencies
between classes a lead programmer approves it first, but that's a
separate discussion.


--Noel
ll...@co...



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