libstdc++-v3/testsuite/23_containers/forward_list/cons/11.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2012-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 23.3.4.2 forward_list construction [forwardlist.cons]
  21
  22 #include <forward_list>
  23
  24 bool fail = false;
  25
  26 struct A
  27 {
  28   A() = default;
  29   A(const A&) { if (fail) throw fail; }
  30 };
  31
  32 void test01()
  33 {
  34   typedef std::forward_list<A> list;
  35
  36   list l(2);
  37   A from[2];
  38   fail = true;
  39   // Check existing elements are assigned to, instead of creating new ones.
  40   // This is QoI, not required by the standard.
  41   l.assign(from, from+2);
  42   l.assign(2, from[0]);
  43 }
  44
  45 int main()
  46 {
  47   test01();
  48 }