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C++ Derived Class Override Return Type


C++ Derived Class Override Return Type

By : user2186623
Date : November 25 2020, 04:01 AM
With these it helps You cannot.
The static type of an expression cannot depend on the dynamic type of an object. Take for instance:
code :
auto f(Node& n) { return n.eval(); }


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Abstract base class for derived classes with functions that have a return type of the derived class

Abstract base class for derived classes with functions that have a return type of the derived class


By : Bethie
Date : March 29 2020, 07:55 AM
Any of those help When a virtual function returns a pointer or reference to a class, a class which inherits from the base class and overrides the function is allowed to change the return type to a pointer or reference to a class which is derived from the original return type.
You can't return base by value as it is abstract so you can't actually create one by itself.
C# : Override a property and return a derived type

C# : Override a property and return a derived type


By : Hadas David
Date : March 29 2020, 07:55 AM
wish helps you Let's say I have a class A with the property "Details" that return an instance of class B. , Maybe you can try generics, something like this:
code :
public class A<T> where T : B
{
    public T Details { get; set; }
}

public class Aext : A<Bext>
{
}

public class B
{

}

public class Bext : B
{

}
C# Possible to override a return type on derived classes?

C# Possible to override a return type on derived classes?


By : Ilkay Bülbül
Date : March 29 2020, 07:55 AM
wish help you to fix your issue , Short answer is no.
Think of it, how will you use it later?
code :
base b = new derivedc ()
class base<T>{
    ....
    public virtual T name();
    ....
}

class deriveda : base<string>{
    ....
    public override string name();
    ....
}

class derivedb : base<string>{
    ....
    public override string name();
    ....
}

class derivedc : base<foo>{
    ....
    public override foo name();
    ....
}
How to override method with derived return type in C#?

How to override method with derived return type in C#?


By : Mahil Arasan
Date : March 29 2020, 07:55 AM
To fix this issue I want to override a virtual method with a derived class type. What's the current best way to do this? So far I've found two approaches: , You could make the base class generic:
When called on a derived class, have a generic method defined in base class return derived class type in Java

When called on a derived class, have a generic method defined in base class return derived class type in Java


By : noe041
Date : March 29 2020, 07:55 AM
around this issue You will just need to type cast it to the Generic type T in the RootEntity.save() method.
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