[已解决]关于C++类的继承与重写

闪亮的马路

像下面MoveGroupInterface继承了MoveGroupInterfaceImpl，但是public中对MoveGroupInterfaceImpl的操作是什么意思？我理解的重写不是应该是方法吗，整个类也可以这样操作吗？

class MoveGroupInterface::MoveGroupInterfaceImpl
{
public:
  MoveGroupInterfaceImpl(const Options& opt, const std::shared_ptr<tf2_ros::Buffer>& tf_buffer,
                         const ros::WallDuration& wait_for_servers)
    : opt_(opt), node_handle_(opt.node_handle_), tf_buffer_(tf_buffer)
  {
   

    joint_model_group_ = getRobotModel()->getJointModelGroup(opt.group_name_);

    joint_state_target_.reset(new moveit::core::RobotState(getRobotModel()));
    joint_state_target_->setToDefaultValues();
    active_target_ = JOINT;
    can_look_ = false;
    can_replan_ = false;
    replan_delay_ = 2.0;
    goal_joint_tolerance_ = 1e-4;
    goal_position_tolerance_ = 1e-4;     // 0.1 mm
    goal_orientation_tolerance_ = 1e-3;  // ~0.1 deg
    allowed_planning_time_ = 5.0;
    num_planning_attempts_ = 1;
    node_handle_.param<double>("robot_description_planning/joint_limits/default_velocity_scaling_factor",
                               max_velocity_scaling_factor_, 0.1);
    node_handle_.param<double>("robot_description_planning/joint_limits/default_acceleration_scaling_factor",
                               max_acceleration_scaling_factor_, 0.1);
    initializing_constraints_ = false;

    if (joint_model_group_->isChain())
      end_effector_link_ = joint_model_group_->getLinkModelNames().back();
    pose_reference_frame_ = getRobotModel()->getModelFrame();

    trajectory_event_publisher_ = node_handle_.advertise<std_msgs::String>(
        trajectory_execution_manager::TrajectoryExecutionManager::EXECUTION_EVENT_TOPIC, 1, false);
    attached_object_publisher_ = node_handle_.advertise<moveit_msgs::AttachedCollisionObject>(
        planning_scene_monitor::PlanningSceneMonitor::DEFAULT_ATTACHED_COLLISION_OBJECT_TOPIC, 1, false);

    current_state_monitor_ = getSharedStateMonitor(robot_model_, tf_buffer_, node_handle_);

    ROS_INFO_STREAM_NAMED(LOGNAME, "Ready to take commands for planning group " << opt.group_name_ << ".");
  }

最佳答案

月排行榜 / 总排行榜

xieglt

2020-10-16 15:16:04

单冒号表示继承

1. 
   
2. class b
   
3. {
   
4. }
   
5. class a : public b
   
6. {
   
7. }
   

复制代码

双冒号表示作用域,表示 class b 是 class a 的内部类

1. 
   
2. class a
   
3. {
   
4. public:
   
5.         a(){}
   
6.         ~a(){}
   
7. public:
   
8.         class b;
   
9. private:
   
10.         int m_a;
    
11. };
    
12. 
    
13. class a::b
    
14. {
    
15. public:
    
16.         b(){};
    
17.         ~b(){};
    
18. private:
    
19.        
    
20. };
    

复制代码

跳转到最佳答案楼层

xieglt

单冒号表示继承

1. 
   
2. class b
   
3. {
   
4. }
   
5. class a : public b
   
6. {
   
7. }
   

复制代码

双冒号表示作用域,表示 class b 是 class a 的内部类

1. 
   
2. class a
   
3. {
   
4. public:
   
5.         a(){}
   
6.         ~a(){}
   
7. public:
   
8.         class b;
   
9. private:
   
10.         int m_a;
    
11. };
    
12. 
    
13. class a::b
    
14. {
    
15. public:
    
16.         b(){};
    
17.         ~b(){};
    
18. private:
    
19.        
    
20. };
    

复制代码