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class Vector
{
    float x;
    float y;
 
public:
    Vector(float x, float y) : x(x), y(y) {}
    Vector& operator = (const Vector& v) { x = v.x; y = v.y; return *this; }
    //Vector(Vector&&) = default;
};
 
 
class Rect
{
public:
    union {
        struct {
            Vector p1, p2;
        } ;
 
        struct {
            float p1x, p1y, p2x, p2y;
        } ;
    } ;
 
 
    Rect() : p1(0, 0), p2(0, 0) {} 
    Rect(Vector& p1,  Vector& p2) : p1(p1), p2(p2) {}
 
    Rect& operator=(const Rect& other) {
        p1 = other.p1 ; 
        p2 = other.p2 ;
        return *this ;
    }
 
    /*Rect(const Rect&) = default;
    Rect& operator=(const Rect&) = default;
    Rect& operator=(Rect&&) = default;
    Rect(Rect&&) = default;*/
};
 
 
int main()
{
    Rect test = Rect();
    test = Rect();
    return 0;
}

prog.cpp:18:20: error: member 'Vector Rect::<anonymous union>::<anonymous struct>::p1' with constructor not allowed in anonymous aggregate
             Vector p1, p2;
                    ^
prog.cpp:18:20: error: member 'Vector Rect::<anonymous union>::<anonymous struct>::p1' with copy assignment operator not allowed in anonymous aggregate
prog.cpp:18:24: error: member 'Vector Rect::<anonymous union>::<anonymous struct>::p2' with constructor not allowed in anonymous aggregate
             Vector p1, p2;
                        ^
prog.cpp:18:24: error: member 'Vector Rect::<anonymous union>::<anonymous struct>::p2' with copy assignment operator not allowed in anonymous aggregate

Standard output is empty