gdb/testsuite/gdb.cp/pass-by-ref.cc

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2007-2019 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 class Obj {
  19 public:
  20   Obj ();
  21   Obj (const Obj &);
  22   ~Obj ();
  23   int var[2];
  24 };
  25
  26 int foo (Obj arg)
  27 {
  28   return arg.var[0] + arg.var[1];
  29 }
  30
  31 Obj::Obj ()
  32 {
  33   var[0] = 1;
  34   var[1] = 2;
  35 }
  36
  37 Obj::Obj (const Obj &obj)
  38 {
  39   var[0] = obj.var[0];
  40   var[1] = obj.var[1];
  41 }
  42
  43 Obj::~Obj ()
  44 {
  45
  46 }
  47
  48 struct Derived : public Obj
  49 {
  50   int other;
  51 };
  52
  53 int blap (Derived arg)
  54 {
  55   return foo (arg);
  56 }
  57
  58 struct Container
  59 {
  60   Obj obj;
  61 };
  62
  63 int blip (Container arg)
  64 {
  65   return foo (arg.obj);
  66 }
  67
  68 Obj global_obj;
  69 Derived global_derived;
  70 Container global_container;
  71
  72 int
  73 main ()
  74 {
  75   int bar = foo (global_obj);
  76   blap (global_derived);
  77   blip (global_container);
  78   return bar;
  79 }