gdb/testsuite/gdb.cp/rvalue-ref-params.cc

   1 /* This test script is part of GDB, the GNU debugger.
   2
   3    Copyright 2006-2021 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 /* Rvalue reference parameter tests, based on ref-params.cc.  */
  19
  20 #include <utility>
  21
  22 struct Parent
  23 {
  24   Parent (int id0) : id (id0) { }
  25   int id;
  26 };
  27
  28 struct Child : public Parent
  29 {
  30   Child (int id0) : Parent (id0) { }
  31 };
  32
  33 int
  34 f1 (Parent &&R)
  35 {
  36   return R.id;                  /* Set breakpoint marker3 here.  */
  37 }
  38
  39 int
  40 f2 (Child &&C)
  41 {
  42   return f1 (std::move (C));                 /* Set breakpoint marker2 here.  */
  43 }
  44
  45 int
  46 f3 (int &&var_i)
  47 {
  48   return var_i + 1;
  49 }
  50
  51 int
  52 f4 (float &&var_f)
  53 {
  54   return static_cast <int> (var_f);
  55 }
  56
  57 struct OtherParent
  58 {
  59   OtherParent (int other_id0) : other_id (other_id0) { }
  60   int other_id;
  61 };
  62
  63 struct MultiChild : public Parent, OtherParent
  64 {
  65   MultiChild (int id0) : Parent (id0), OtherParent (id0 * 2) { }
  66 };
  67
  68 int
  69 mf1 (OtherParent &&R)
  70 {
  71   return R.other_id;
  72 }
  73
  74 int
  75 mf2 (MultiChild &&C)
  76 {
  77   return mf1 (std::move (C));
  78 }
  79
  80 /* These are used from within GDB.  */
  81 int global_int = 7;
  82 float global_float = 3.5f;
  83
  84 int
  85 main ()
  86 {
  87   Child Q(40);
  88   Child &QR = Q;
  89
  90   /* Set breakpoint marker1 here.  */
  91
  92   f1 (Child (41));
  93   f2 (Child (42));
  94
  95   MultiChild MQ (53);
  96   MultiChild &MQR = MQ;
  97
  98   mf2 (std::move (MQ));                 /* Set breakpoint MQ here.  */
  99
 100   (void) f3 (-1);
 101   (void) f4 (3.5);
 102
 103   return 0;
 104 }