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

   1 // { dg-do compile { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // 2007-07-10  Paolo Carlini  <pcarlini@suse.de>
   5 //
   6 // Copyright (C) 2007-2024 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 #include <memory>
  24 #include <utility>
  25
  26 template<class T, class A1, class A2>
  27   std::shared_ptr<T>
  28   factory(A1&& a1, A2&& a2)
  29   {
  30     return std::shared_ptr<T>(
  31         new T(std::forward<A1>(a1), // { dg-error "rvalue" }
  32               std::forward<A2>(a2)));
  33   }
  34
  35 struct A
  36 {
  37   A(int&, const double&);
  38 };
  39
  40 void g()
  41 {
  42   std::shared_ptr<A> sp1 = factory<A>(2, 1.414); // { dg-error "required from here" }
  43 }
  44
  45 // Discard a bogus warning showing up with -Wall.
  46 // { dg-prune-output "control reaches end of" }