关于c 11:C纯虚错误 | 珊瑚贝

C++ pure virtual error

我正在尝试从抽象类继承，但出现以下错误：

In file included from /usr/include/c++/5/vector:64:0,
from /usr/include/boost/format.hpp:17,
from /usr/include/boost/math/policies/error_handling.hpp:31,
from /usr/include/boost/math/special_functions/round.hpp:14,
from /opt/ros/kinetic/include/ros/time.h:58,
from /opt/ros/kinetic/include/ros/ros.h:38,
from /home/gil/catkin_ws/src/manager/include/Tasks/Task.h:4,
from /home/gil/catkin_ws/src/manager/src/Tasks/Task.cpp:1:
/usr/include/c++/5/bits/stl_vector.h:713:7: error: invalid abstract
parameter type a€?manager::Taska€?
resize(size_type __new_size, value_type __x = value_type())

—

/home/gil/catkin_ws/src/manager/include/Tasks/Task.h:11:16: note:
virtual void manager::Task::Execute() virtual void Execute() = 0;
^ In file included from /usr/include/c++/5/vector:64:0,
from /usr/include/boost/format.hpp:17,
from /usr/include/boost/math/policies/error_handling.hpp:31,
from /usr/include/boost/math/special_functions/round.hpp:14,
from /opt/ros/kinetic/include/ros/time.h:58,
from /opt/ros/kinetic/include/ros/ros.h:38,
from /home/gil/catkin_ws/src/manager/include/Tasks/Task.h:4,
from /home/gil/catkin_ws/src/manager/include/Tasks/RootTask.h:10,
from /home/gil/catkin_ws/src/manager/src/Tasks/RootTask.cpp:8:
/usr/include/c++/5/bits/stl_vector.h:713:7: error: invalid abstract
parameter type a€?manager::Taska€?
resize(size_type __new_size, value_type __x = value_type())

—

manager/CMakeFiles/manager.dir/build.make:110: recipe for target
‘manager/CMakeFiles/manager.dir/src/Tasks/Task.cpp.o’ failed make[2]:
* [manager/CMakeFiles/manager.dir/src/Tasks/Task.cpp.o] Error 1 make[2]: * Waiting for unfinished jobs….
manager/CMakeFiles/manager.dir/build.make:158: recipe for target
‘manager/CMakeFiles/manager.dir/src/Tasks/RootTask.cpp.o’ failed
make[2]: *** [manager/CMakeFiles/manager.dir/src/Tasks/RootTask.cpp.o]
Error 1 In file included from /usr/include/c++/5/vector:64:0,
from /usr/include/boost/format.hpp:17,
from /usr/include/boost/math/policies/error_handling.hpp:31,
from /usr/include/boost/math/special_functions/round.hpp:14,
from /opt/ros/kinetic/include/ros/time.h:58,
from /opt/ros/kinetic/include/ros/ros.h:38,
from /home/gil/catkin_ws/src/manager/src/indoor_mission_action_server.cpp:9:
/usr/include/c++/5/bits/stl_vector.h:713:7: error: invalid abstract
parameter type a€?manager::Taska€?
resize(size_type __new_size, value_type __x = value_type())

不知道我错过了什么……
这是我的 H 和 CPP 文件：

RootTask.cpp

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#include”Tasks/RootTask.h”
namespace manager {
RootTask::RootTask(std::string name) {
mTaskName = name;
}
RootTask::~RootTask() {}
RootTask::RootTask() {}

void RootTask::Execute() {}

void RootTask::setTaskSeqByName() {}
std::string RootTask::GetTaskName() {
return mTaskName;
}
}

RootTask.h

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#include”Tasks/Task.h”
namespace manager {
class RootTask: public Task {
public:

RootTask();
RootTask(std::string name);~RootTask();

void Execute();
void setTaskSeqByName();
std::string GetTaskName();
};
}

任务.cpp

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#include”Tasks/Task.h”
#include < iostream >

namespace manager {
void Task::Stop() {}
void Task::Pause() {}
void Task::OnError() {}
std::string Task::GetTaskName() {}
void Task::setTaskSeqByName() {}
}

任务.h

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#pragma once

#include < iostream >
#include”ros/ros.h”

namespace manager {
class Task {
public:
virtual void Execute() = 0;
virtual void setTaskSeqByName();
virtual void Stop();
virtual void Pause();
virtual void OnError();
virtual std::string GetTaskName();

protected:
std::string mTaskName;
std::vector < Task > mTaskSequence;
};
}

感谢您的帮助。

在 Task 你有一个成员

1	std::vector < Task > mTaskSequence;

你不能拥有它，因为 Task 是一个抽象类，你不能创建它的实例。您需要使用像

这样的指针类型

1	std::vector<std::unique_ptr<Task>> mTaskSequence;

@NathanOliver 的回答指出了如何修复编译器错误。

我想指出，让 Task 包含指向其他 Task 的指针列表似乎是一个可能的设计缺陷。

您可能需要考虑将其移至处理 Tasks 序列的更高级别的类。

C++ pure virtual error

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