l i n u x - u s e r s - g r o u p - o f - d a v i s
Next Meeting:
July 7: Social gathering
Next Installfest:
Latest News:
Jun. 14: June LUGOD meeting cancelled
Page last updated:
2006 Feb 06 08:55

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] grokking g++ errors
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] grokking g++ errors

On Thu 02 Feb 06,  1:12 PM, Micah J. Cowan <micah@cowan.name> said:
> On Thu, Feb 02, 2006 at 02:59:35PM -0500, Peter Jay Salzman wrote:
> > On Thu 02 Feb 06, 10:21 AM, Jeff Newmiller <jdnewmil@dcn.davis.ca.us> said:
> > > 
> > > You didn't ask for assistance in actually troubleshooting this problem, but
> > > templates traditionally must be defined before they are instantiated in the
> > > source.  It is possible that newer compilers can handle definition after
> > > instantiation, but I don't know how they do it.
> > 
> > Sorry for being so dense, but I'm just now starting to try to really learn
> > function and class templates.
> > 
> > Do you mean that the template function definition must be seen before the
> > any calls to the function is made (I assume that's the instantiation)?
> > 
> > I guess what I'm asking is -- is the template function's prototype not
> > enough?  The actual definition must be seen before any calls to the function
> > are made?
> IIRC this should not be true (though I'll point out that in your sample
> code, no such prototype has been provided);

it was a code snipppet -- the prototypes were in an include file that i
didn't show!   :)

> Realize that defining a function /template/ does not define any
> function, only a template.  That's what /instantiating/ the template
> does. It makes it easy on the compiler if the function template's
> definition is in scope at the time you implicitly or explicitly
> instantiate it, and some compilers may require this, though the C++
> stnadard does not (only that it's in the same "translation unit"
> somewhere).
that's definitely a good way of putting it -- thanks!  i'll keep that in

vox-tech mailing list

LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
Appahost Applications
For a significant contribution towards our projector, and a generous donation to allow us to continue meeting at the Davis Library.