Robot Builder Generating Code with Errors in it

Technical C/C++
1

I generated this code in Robot builder and then imported it into eclipse and hit build. The Code had errors in the robot.h file and the motor.h file (motor.h is in the subsystem folder as the only system I am currently trying to test)

robot.h:

// RobotBuilder Version: 1.5
//
// This file was generated by RobotBuilder. It contains sections of
// code that are automatically generated and assigned by robotbuilder.
// These sections will be updated in the future when you export to
// C++ from RobotBuilder. Do not put any code or make any change in
// the blocks indicating autogenerated code or it will be lost on an
// update. Deleting the comments indicating the section will prevent
// it from being updated in the future.


#ifndef _ROBOT_H
#define _ROBOT_H

#include "WPILib.h"
#include "Commands/Command.h"
#include "RobotMap.h"
#include "LiveWindow/LiveWindow.h"

// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=INCLUDES
#include "Commands/AutonomousCommand.h"
#include "Subsystems/motor.h"

// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=INCLUDES
#include "OI.h"

class Robot : public IterativeRobot {
public:
	Command *autonomousCommand;
	static OI *oi;
	LiveWindow *lw;
	// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DECLARATIONS
	static motor* motor;
	// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DECLARATIONS
	virtual void RobotInit();
	virtual void DisabledInit();
	virtual void DisabledPeriodic();
	virtual void AutonomousInit();
	virtual void AutonomousPeriodic();
	virtual void TeleopInit();
	virtual void TeleopPeriodic();
	virtual void TestPeriodic();
};
#endif

In line 33:


static motor* motor;

I get the error message: declaration of ‘motor* Robot::motor’ -fpermissive]

motor.h:


// RobotBuilder Version: 1.5
//
// This file was generated by RobotBuilder. It contains sections of
// code that are automatically generated and assigned by robotbuilder.
// These sections will be updated in the future when you export to
// C++ from RobotBuilder. Do not put any code or make any change in
// the blocks indicating autogenerated code or it will be lost on an
// update. Deleting the comments indicating the section will prevent
// it from being updated in the future.


#ifndef MOTOR_H
#define MOTOR_H
#include "Commands/Subsystem.h"
#include "WPILib.h"

/**
 *
 *
 * @author ExampleAuthor
 */
class motor: public Subsystem {
private:
	// It's desirable that everything possible under private except
	// for methods that implement subsystem capabilities
public:
	// BEGIN AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DECLARATIONS
	SpeedController* talon;
	// END AUTOGENERATED CODE, SOURCE=ROBOTBUILDER ID=DECLARATIONS
	motor();
	void InitDefaultCommand();
};

#endif

In line 22:


class motor: public Subsystem {

I get the error message: changes meaning of ‘motor’ from ‘class motor’ -fpermissive]

I can tell that these errors are related and that if I resolve one it will probably resolve the other as well but I do not understand what is wrong and do not know what to do. Any help is appreciated.

2

RobotBuilder was designed with the naming conventions delineated here: https://wpilib.screenstepslive.com/s/4485/m/13810/l/145323-c-conventions-for-objects-methods-and-variables#!prettyPhoto

In particular, since your motor class is lower case rather then first letter upper case, it’s trying to declare an instance variable with the same name as the class. Delete the motor.cpp and .h and change your subystem name to Motor and clean and rebuilt and it should work.

In general, motor is probably not a good subsystem name. It should be tied to something unique and memorable piece of your robot, like DriveTrain, Arm, Stacker, or something like that. More ideas here: http://wpilib.screenstepslive.com/s/4485/m/13810/l/241892-what-is-command-based-programming

3

Thank you that fixed it.

4