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

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 1998-2018 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 references overload tests for GDB, based on overload.cc.  */
  19
  20 #include <stddef.h>
  21 #include <utility>
  22
  23 class foo;
  24
  25 typedef foo &foo_lval_ref;
  26 typedef foo &&foo_rval_ref;
  27
  28 class foo
  29 {
  30 public:
  31   foo ();
  32   foo (foo_lval_ref);
  33   foo (foo_rval_ref);
  34   ~foo ();
  35
  36   int overload1arg (foo_lval_ref);
  37   int overload1arg (foo_rval_ref);
  38 };
  39
  40 void
  41 marker1 ()
  42 {
  43 }
  44
  45 static int
  46 f (int &x)
  47 {
  48   return 1;
  49 }
  50
  51 static int
  52 f (const int &x)
  53 {
  54   return 2;
  55 }
  56
  57 static int
  58 f (int &&x)
  59 {
  60   return 3;
  61 }
  62
  63 int
  64 main ()
  65 {
  66   foo foo_rr_instance1;
  67   foo arg;
  68   int i = 0;
  69   const int ci = 0;
  70
  71   // result = 1 + 2 + 3 + 3 = 9
  72   int result = f (i) + f (ci) + f (0) + f (std::move (i));
  73
  74   marker1 (); // marker1-returns-here
  75   return result;
  76 }
  77
  78 foo::foo  ()                       {}
  79 foo::foo  (foo_lval_ref afoo)      {}
  80 foo::foo  (foo_rval_ref afoo)      {}
  81 foo::~foo ()                       {}
  82
  83 /* Some functions to test overloading by varying one argument type. */
  84
  85 int foo::overload1arg (foo_lval_ref arg)           { return 1; }
  86 int foo::overload1arg (foo_rval_ref arg)           { return 2; }