Function cloneUnique

runtime/3rdparty/jsoncpp/jsoncpp.cpp:2688–2696

namespace Json
{
template <typename T> static std::unique_ptr<T> cloneUnique(const std::unique_ptr<T> &p)
{
  std::unique_ptr<T> r;
  if (p)
  {
    r = std::unique_ptr<T>(new T(*p));
  }
  return r;
}

// This is a walkaround to avoid the static initialization of Value::null.
// kNull must be word-aligned to avoid crashing on ARM.  We use an alignment of