String and implicit sharing

[TomNow99]

Hi,

I would like to know, if I use implicit sharing every time.

So I have 3 classes:

class A {
public:
   QString getCurrentString() {
      return currentString;
   }
   void setCurrentString(QString str) {
      currentString = str;
   }
private:
   QString currentString;
}


class B {
public:
   B(A *a) {
      currentA = a;
   }
   void createString() {
      QString someString = "some Text";
      currentA->setCurrentString(someString);
   }
private:
   A *currentA;
}


class C {
public:
   C(A *a) {
      currentA = a;
   }
   void useString() {
      QString str = currentA->getCurrentString();
      // here some use for example otherClass->useString(str);
   }
private:
   A *currentA;
}

I have only one object of class C and I give that object C to constructor A and B. Next I create string in class B ( createString method ) and in other place I use that string in class C ( useString() ). And my question: I create that string only in one place and in other places I only implicit sharing it? Of course I don't change string. I don't want other deep copies.

[Christian Ehrlicher]

As long as you don't access the object via a non-const function there is only one QString instance with '"some Text"'.