copy vs assign
Still a little fuzzy on this:
I know a new object can be initialized to an existing one using
myclass objectB(objectA);
But is it correct that an already existing object can NOT be (re)assigned to another already existing object using:
objectA(objectC);
instead of the normal assignment:
objectA = objectC;
Just checking.
I know a new object can be initialized to an existing one using
myclass objectB(objectA);
But is it correct that an already existing object can NOT be (re)assigned to another already existing object using:
objectA(objectC);
instead of the normal assignment:
objectA = objectC;
Just checking.
Correct.
Calls myclass's copy constructor. Since a constructor can't be called on an object after it's already been constructed -- the only time you can do this is when you create the object.
Instead,
The only tricky part is this:
This actually calls the copy ctor on B and not the assignment operator (even though it's using the assignment operator!).
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Calls myclass's copy constructor. Since a constructor can't be called on an object after it's already been constructed -- the only time you can do this is when you create the object.
Instead,
B = A; calls the assignment operator which can be called any time after an object has been constructed.The only tricky part is this:
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This actually calls the copy ctor on B and not the assignment operator (even though it's using the assignment operator!).
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