From:	Adam Maj <Adam DOT Maj AT ifj DOT edu DOT pl>
Newsgroups:	comp.os.msdos.djgpp
Subject:	problem using "templates"
Date:	Thu, 30 Dec 1999 12:23:07 +0100
Organization:	Niewodniczanski Institute of Nuclear Physics, Krakow
Lines:	42
Message-ID:	<386B409A.2432FDEE@ifj.edu.pl>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Hi,

I have serious problem, connected with using " templates" in DJGPP. I
cannot use objects "static", because this leads to errors.
Here is small example of program "TEST. CC", that is causing errors:

      #include <iostream.h>
      template <class ccc> class my_class {
      public :
      static char* str;
      };
      template <class ccc> char* my_class<ccc>::str="abc";
      main() {
      cerr << my_class<int>::str << endl;
      }


Here is announcement of error (from window "Message Window" in RHIDE) :
  Compiling: test.cc
  no errors
  Creating: test.exe
  Error: test.o: In function `main':
  test.cc(1) Error: undefined reference to `my_class<int>::str'
  There were some errors

If we will exchange declaration of variable type of variable " str"
from" char*" into" int" program will work (and compile oneself)  well.
But I think that use of type" int" : is the only exception, when it is
possible to use static variable in "template". In remaining situations
program does not compile oneself, or works incorrect  (when I use type"
long long int" program work, but returns unsuitable value of variable
"str").

How can I fix this bug ? Maybe there is (or will be) new version of GNU
(or DJGPP) ?
I am using version 202
If You can help, please answer.

Thanks a lot
                                        Rafal Maj

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