the default constructor of union cannot be referenced -- it is a deleted function

[Putarda]

I don't understand where I'm wrong at my code O.o.

class Object {

private:

std::string name;

Shape shape;//union

public:

Object() = default;

Object(std::string object_name, Rectangle object_rectangle) {
//error
name = object_name;

shape.rectangle = object_rectangle;

}

};

[SakurasouBusters]

Can you show us the Shape structure? Rectangle structure will also do.

[Putarda]

union Shape {

Shape_Type type;

Rectangle rectangle;

Circle circle;

};

class Rectangle {

private:

sf::RectangleShape rectangleshape;

public:

Rectangle() = default;

Rectangle(float width, float height) : rectangleshape(sf::RectangleShape(sf::Vector2f(width, height))) {}

void setPosition(float position_x, float position_y) {

rectangleshape.setPosition(position_x, position_y);

}

void setAngle(float angle) {

rectangleshape.setRotation(angle);

}

sf::RectangleShape* getRectangleShape() {

return &rectangleshape;
}

Position getPosition() {

return Position(rectangleshape.getPosition().x, rectangleshape.getPosition().y);
}

};

[SakurasouBusters]

Why do you use Union structure?
If anything, you should use virtual inheritance.
http://www.cplusplus.com/doc/tutorial/polymorphism/

[Putarda]

Well how do you think i can call .setPosition from Rectangle/Circle from Object instance?

[SakurasouBusters]

You can just use struct Shape and it will work. Just one more variable to determine which type of structure you should use.

const int SHAPE_UNDEFINED = 0;
const int RECTANGLE_TYPE = 1;
const int CIRCLE_TYPE = 2;

struct Shape
{
    Shape() {shapeType = SHAPE_UNDEFINED;}

    Shape_Type type;
    Rectangle rectangle;
    Circle circle;

    int shapeType;
};

And...

Object(std::string object_name, Rectangle object_rectangle)
{
    name = object_name;
    shape.rectangle = object_rectangle;
    shape.shapeType = RECTANGLE_TYPE;
}

There are definitely some other ways to do it. For example, you can make use of class inheritance.

[Putarda]

I was trying to make it with inheritance. But I was having a big problem. How do I call from Object Rectangle's setPosition function.

If Object is Base class and Rectangle and Circle are Derived classes.

[SakurasouBusters]

If Object is Base class and Rectangle and Circle are Derived classes.

You have to use virtual inheritance if that's the case.