Lambda

void SceneGame::SortObjects()
{
    auto sorterRaw = []( ObjectPtr it1, ObjectPtr it2 ) -> bool
                     {
                        auto obj1 = static_cast< DepthObject* >( it1.get() );
                        auto obj2 = static_cast< DepthObject* >( it2.get() );

                        if ( obj1->GetDepth() == obj2->GetDepth() )
                        {
                            return false;
                        }

                        return obj1->GetDepth() > obj2->GetDepth();
                     };

    using namespace std::placeholders;
    auto sorter = std::bind( sorterRaw, _1, _2 );

    std::sort( objects.begin(), objects.end(), sorter );
}