🚀 go-pugleaf

In article <4iat2h$pk5@clarknet.clark.net>, gusty@clark.net (Harlan
Messinger) wrote:

: scott douglass (sdouglas@armltd.co.uk) wrote:
: : Hello all,
: : 
: : Given a class type with only a no-argument contstrutor:
: : 
: : struct T { T(); /* ... */ };  // assume no other ctors
: : 
: : Is there any way to define an extern const object of class T?
:[...]
: You'll declare
: 
:         extern const T t2;
: 
: in the header file, but define
: 
:         const T t2;
: 
: as a global non-static object in the one source file in which you want it
: to reside. 

Thanks.  As you mention and Geert-Jan Giezeman pointed out in private
e-mail, the key here is that the definition can be accomplished by having
both and extern declaration and a definition the same translation unit:

extern const T t;  // declaration
const T t;  // definition, still extern

You can't do it in one declaration but it's not hard after all.
    --scott
---
[ comp.std.c++ is moderated.  To submit articles: try just posting with      ]
[ your news-reader.  If that fails, use mailto:std-c++@ncar.ucar.edu         ]
[ FAQ:      http://reality.sgi.com/employees/austern_mti/std-c++/faq.html    ]
[ Policy:   http://reality.sgi.com/employees/austern_mti/std-c++/policy.html ]
[ Comments? mailto:std-c++-request@ncar.ucar.edu                             ]