From:	"Aleksey Kondratyev" <akondra AT no-spam-mv DOT ru>
Newsgroups:	comp.os.msdos.djgpp
Subject:	DJGPP 2.8.0 labels as values problem
Date:	Thu, 4 Jun 1998 11:05:12 +0400
Organization:	Middle Volga Communication service
Lines:	44
Message-ID:	<6l5h74$jio$1@simtel.ru>
NNTP-Posting-Host:	ppp13.usr.mv.ru
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hello DJGPP users,

I have a problem using labels as values gcc extension
in a c++ module. The following sample was compiled
fine by DJGPP 2.7.2.1but 2.8.0 version complains on
"Error: sorry, not implemented: initializer contains
unrecognized tree code".

#include <fstream.h>
#define ADD 0
#define SUB 1
template<class T>
T do_it(T a,T b,int op) {
    static void *oops[]={&&op_add,&&op_sub};
    goto *oops[(const int)op];
    op_add:
      return a+b;
    op_sub:
      return a-b;
}
int main() {
  cout<<do_it(2,2,ADD)<<'\n'<<do_it(2,2,SUB);
  return 0;
}

It is compiled fine without 'templates' but avoiding
of a template in my real module is quite difficult.
Please, suggest something!
E.g., is it be possible to declare labels in g++
beforehand?

----------------------------------------------------------------------
Aleksey Kondratyev
Ph.D. student of Ulyanovsk state University, Russia
http://www.mv.ru/~akondra
E-mail akondra AT mmf DOT univ DOT simbirsk DOT su
           akondra AT no-spam-mv DOT ru
           Remove "no-spam-" when replying

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