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      1 /* Copyright 2015-2024 Free Software Foundation, Inc.
      2 
      3    This program is free software; you can redistribute it and/or modify
      4    it under the terms of the GNU General Public License as published by
      5    the Free Software Foundation; either version 3 of the License, or
      6    (at your option) any later version.
      7 
      8    This program is distributed in the hope that it will be useful,
      9    but WITHOUT ANY WARRANTY; without even the implied warranty of
     10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     11    GNU General Public License for more details.
     12 
     13    You should have received a copy of the GNU General Public License
     14    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     15 
     16 struct A
     17 {
     18   virtual int doit () { return 1; }
     19   virtual int doit3 () { return -3; }
     20   virtual int doit2 () = 0;
     21 };
     22 
     23 struct B : virtual A
     24 {
     25   int doit () { return 2; }
     26   int doit2 () { return 22; }
     27 };
     28 
     29 struct C : virtual A
     30 {
     31   int doit () { return 3; }
     32   int doit2 () { return 33; }
     33 };
     34 
     35 struct D : B, C
     36 {
     37   int doit () { return 4; }
     38   int doit2 () { return 44; }
     39 };
     40 
     41 int
     42 main ()
     43 {
     44   int var = 1234;
     45   B b;
     46   C c;
     47   D d;
     48   A *ap = &d;
     49 
     50   var = (b.doit () + c.doit () + d.doit () + d.doit3 ()
     51 	 + ap->doit () + ap->doit2 ());	// break here
     52 
     53   return 0;
     54 }
     55