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 #include <boost/container/detail/config_begin.hpp>
  11 #include <boost/container/detail/workaround.hpp>
  12 //[doc_emplace
  13 #include <boost/container/list.hpp>
  14 #include <cassert>
  15
  16 //Non-copyable and non-movable class
  17 class non_copy_movable
  18 {
  19    non_copy_movable(const non_copy_movable &);
  20    non_copy_movable& operator=(const non_copy_movable &);
  21
  22    public:
  23    non_copy_movable(int = 0) {}
  24 };
  25
  26 int main ()
  27 {
  28    using namespace boost::container;
  29
  30    //Store non-copyable and non-movable objects in a list
  31    list<non_copy_movable> l;
  32    non_copy_movable ncm;
  33
  34    //A new element will be built calling non_copy_movable(int) contructor
  35    l.emplace(l.begin(), 0);
  36    assert(l.size() == 1);
  37
  38    //A new element will be value initialized
  39    l.emplace(l.begin());
  40    assert(l.size() == 2);
  41    return 0;
  42 }
  43 //]
  44 #include <boost/container/detail/config_end.hpp>