libstdc++-v3/testsuite/20_util/forward/1_neg.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // 2007-07-10  Paolo Carlini  <pcarlini@suse.de>
   4 //
   5 // Copyright (C) 2007-2020 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <memory>
  23 #include <utility>
  24
  25 template<class T, class A1, class A2>
  26   std::shared_ptr<T>
  27   factory(A1&& a1, A2&& a2)
  28   {
  29     return std::shared_ptr<T>(
  30         new T(std::forward<A1>(a1), // { dg-error "rvalue" }
  31               std::forward<A2>(a2)));
  32   }
  33
  34 struct A
  35 {
  36   A(int&, const double&);
  37 };
  38
  39 void g()
  40 {
  41   std::shared_ptr<A> sp1 = factory<A>(2, 1.414); // { dg-error "required from here" }
  42 }
  43
  44 // Discard a bogus warning showing up with -Wall.
  45 // { dg-prune-output "control reaches end of" }