[ROS2 Foxy] rclcpp_action “no match for ‘operator=’ (operand types are“

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已于 2024-03-05 08:18:36 修改 · 1.9k 阅读

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于 2024-03-05 00:22:21 首次发布

--- stderr: learning_action_cpp
/userdata/dev_ws/src/ros2_21_tutorials/learning_action_cpp/src/action_move_client.cpp: In member function ‘void MoveCircleActionClient::send_goal(bool)’:
/userdata/dev_ws/src/ros2_21_tutorials/learning_action_cpp/src/action_move_client.cpp:48:84: error: no match for ‘operator=’ (operand types are ‘rclcpp_action::Client<learning_interface::action::MoveCircle>::GoalResponseCallback’ {aka ‘std::function<void(std::shared_future<std::shared_ptr<rclcpp_action::ClientGoalHandle<learning_interface::action::MoveCircle> > >)>’} and ‘std::_Bind_helper<false, void (MoveCircleActionClient::*)(std::shared_ptr<rclcpp_action::ClientGoalHandle<learning_interface::action::MoveCircle> >), MoveCircleActionClient*, const std::_Placeholder<1>&>::type’ {aka ‘std::_Bind<void (MoveCircleActionClient::*(MoveCircleActionClient*, std::_Placeholder<1>))(std::shared_ptr<rclcpp_action::ClientGoalHandle<learning_interface::action::MoveCircle> >)>’})
48 | std::bind(&MoveCircleActionClient::goal_response_callback, this, _1);
| ^
In file included from /usr/include/c++/9/future:48,
from /opt/ros/foxy/include/rclcpp/executors.hpp:18,
from /opt/ros/foxy/include/rclcpp/rclcpp.hpp:146,
from /userdata/dev_ws/src/ros2_21_tutorials/learning_action_cpp/src/action_move_client.cpp:8:
/usr/include/c++/9/bits/std_function.h:462:7: note: candidate: ‘std::function<_Res(_ArgTypes ...)>& std::function<_Res(_ArgTypes ...)>::operator=(const std::function<_Res(_ArgTypes ...)>&) [with _Res = void; _ArgTypes = {std::shared_future<std::shared_ptr<rclcpp_action::ClientGoalHandle<learning_interface::action::MoveCircle> > >}]’
462 | operator=(const function& __x)
| ^~~~~~~~
/usr/include/c++/9/bits/std_function.h:462:33: note: no known conversion for argument 1 from ‘std::_Bind_helper<false, void (MoveCircleActionClient:

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