managing objects derived from the same base class using a container
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thanks, that helps.
You are welcome. I also think @Mircea-Neacsu's advice about
unique_ptris well worth taking. -
You are welcome. I also think @Mircea-Neacsu's advice about
unique_ptris well worth taking.pointers from a library, that`s a topic that`s a bit too advanced or complicated for my present day understanding.
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pointers from a library, that`s a topic that`s a bit too advanced or complicated for my present day understanding.
If you can handle raw pointers, then C++ smart pointers should be easy to understand. Google for C++ unique_pointer tutorial and read through a few of the returned hits. It's fairly straight forward, and in general new C++ development should use the smart pointers instead of using raw (e.g. new/delete).
Keep Calm and Carry On
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pointers from a library, that`s a topic that`s a bit too advanced or complicated for my present day understanding.
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If you can handle raw pointers, then C++ smart pointers should be easy to understand. Google for C++ unique_pointer tutorial and read through a few of the returned hits. It's fairly straight forward, and in general new C++ development should use the smart pointers instead of using raw (e.g. new/delete).
Keep Calm and Carry On
The problem is I hate complicated syntax. Containers are already complicated syntax for me, combine that with another object (pointer) from a library and it becomes unintelligible mess. I will use a complicated feature when I really need to use it and there is no other way around it. Usually I need to use a feature a couple months before I can move on to something more complicated.
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Richard you really think so?
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Richard you really think so?
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ok, it was a joke
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Yes, except for: 1. Why are you using an array size reference in your instantiations? All you should need is:
derivedclass * Derived1 = new derivedclass();
2. Your container is defined to use
somebaseclass *types, so your calls topush_backshould be:AllObject->push_back((somebaseclass*)Derived1);
or better still, using proper C++ casts:
AllObject->push_back(reinterpret_cast(Derived1));
I guess converting the object(pointer) back to it`s original form when time comes to use it somewhere works the same
derivedclass * DerClpointer1 = (derivedclass *)AllObjects->at(0);
Is there a way to check is the conversion is valid? like if an object is of a certain type. For instance how do I convert all objects to their derived state type in a for loop?
for(int i =0; i< AllObjects->size();i++ )
{
// if AllObjects->at(i) is of type derivedclass covert to derivedclass
} -
I guess converting the object(pointer) back to it`s original form when time comes to use it somewhere works the same
derivedclass * DerClpointer1 = (derivedclass *)AllObjects->at(0);
Is there a way to check is the conversion is valid? like if an object is of a certain type. For instance how do I convert all objects to their derived state type in a for loop?
for(int i =0; i< AllObjects->size();i++ )
{
// if AllObjects->at(i) is of type derivedclass covert to derivedclass
}