ceph/src/boost/libs/container/example/doc_emplace.cpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2009-2013. Distributed under the Boost
   4 // Software License, Version 1.0. (See accompanying file
   5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org/libs/container for documentation.
   8 //
   9 //////////////////////////////////////////////////////////////////////////////
  10
  11 //[doc_emplace
  12 #include <boost/container/list.hpp>
  13 #include <cassert>
  14
  15 //Non-copyable and non-movable class
  16 class non_copy_movable
  17 {
  18    non_copy_movable(const non_copy_movable &);
  19    non_copy_movable& operator=(const non_copy_movable &);
  20
  21    public:
  22    non_copy_movable(int = 0) {}
  23 };
  24
  25 int main ()
  26 {
  27    using namespace boost::container;
  28
  29    //Store non-copyable and non-movable objects in a list
  30    list<non_copy_movable> l;
  31    non_copy_movable ncm;
  32
  33    //A new element will be built calling non_copy_movable(int) constructor
  34    l.emplace(l.begin(), 0);
  35    assert(l.size() == 1);
  36
  37    //A new element will be value initialized
  38    l.emplace(l.begin());
  39    assert(l.size() == 2);
  40    return 0;
  41 }
  42 //]