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From:	afn24681 AT afn DOT org (Joseph B. Ottinger)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Template support
Date:	12 Oct 1995 10:39:39 GMT
Lines:	42
References:	<45arp8$e48 AT concorde DOT ctp DOT com>
Nntp-Posting-Host:	freenet4.afn.org
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway:	from newsgroup comp.os.msdos.djgpp

Patrick Draper (pdrap AT ctp DOT com) wrote:
: Hi,

: I'm running DJGPP version 1.12 maint3 with gcc 2.6.3 and I have written a
: small linked list class that uses templates.
: The class compiles just fine, but when I try to link it with a test
: program, the linker can't find any symbols that are in the linked list
: class.
: Is there a special trick to get everything to link? Does the version of
: DJGPP that I have support templates? Will the beta version of DJGPP support
: templates better?

Did you define the list members externaly to the class? I had trouble 
doing the exact same thing under V2.. and Watcom C/C++ 10.0, too. Moving 
the template methods to the class definition straightened things up.

: BTW, if anyone wants the class, they can have it for free. I looked around
: on the WWW for quite a while for public domain code, but everything is
: shareware! So, I wrote a simple one myself, and I intend to make it totally
: public domain.

Bravo! I'm trying to do the same for a graphics library, that uses a 
planar architecture, so the graphics programmer doesn't have to concern 
himself with whether an image is foreground/background or not. (i.e., 
there are four planes; 0 is farthest back, so it's appropriate for 
background images; 3 is farthest up, so it's appropriate for status 
displays and scores, etc.) Along with the library there's a C++ 
fixed-point class, single-linked lists (no need for doubly-linked lists 
yet), and I'm working on adding red-black b-tree support so 3d z-ordering 
will be wasy to support (although red-black trees are handy to have 
around ANYWAY).

BTW, if anyone's interested in this, e-mail me; I can send you the 
current version (unnumbered as of yet; too many holes still!) It uses 
DJGPP V2 beta 3; it comes with three demo programs so far; needs image 
blitting routines and polygon draws and fills. (Any takers? :)

It's using VGA Mode 13h, quite passe, but I'd have to write a smart 
routine to go to Mode X and I'm not ready for it yet. Four things at a 
time, please! :)

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