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Override an abstract class of a base class with template


Override an abstract class of a base class with template

By : user2948312
Date : November 14 2020, 04:48 PM
wish help you to fix your issue Simply specify the actual type for the generic base class, i.e something like:
code :
public class Derived : Base<MyType>
{
    protected override MyType Foo()
    {
        // some implementation that returns an instance of type MyType
    }
}
public class Derived<T> : Base<T>
{
    protected override T Foo()
    {
        // some implementation that returns an instance of type T
    }
}


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given abstract base class X, how to create another template class D<T> where T is the type of the class deriving f

given abstract base class X, how to create another template class D<T> where T is the type of the class deriving f


By : user3118932
Date : March 29 2020, 07:55 AM
I wish did fix the issue. As has been mentioned, it is not possible to build your template as is.
I do not see any issue with passing additional parameters, though I would perhaps pack them into a single structure, for ease of manipulation.
code :
class Message {};
template <typename T> class MessageShim<T>: public Message {};
class Message1: public MessageShim<Message1> {};
In C# override modifier is mandatory in derive class for virtual/abstract methods of base class

In C# override modifier is mandatory in derive class for virtual/abstract methods of base class


By : Thiago Lopes
Date : March 29 2020, 07:55 AM
I wish did fix the issue.
I want to know if the base class has defined some methods virtual, then is it mandatory to override them in derive class?
code :
Squares s3 = new Squares();
s3.Color();
C# Template method override in concrete class from abstract base class

C# Template method override in concrete class from abstract base class


By : user3373648
Date : March 29 2020, 07:55 AM
wish helps you You appear to be trying to provide an implementation for one specific type argument. You can't do that, and it doesn't make sense - it's not clear what would happen if the caller passed in a different type argument, e.g.
code :
Base b = new MyClass2();
b.doSomething<int>(10);
abstract class Base<T>
{
  public abstract string ToString(T t);
  public void DoSomething(T t)
  {
    string myValue = ToString(t);
    ...
  }
}

class MyClass : Base<MyObj>
{
  public override string ToString(MyObj o)
  {
     return o.Name;
  }
}

class MyClass2 : Base<MyObj2>
{
  public override string ToString(MyObj2 o)
  {
     return o.Value;
  }
}
Derived Class of Abstract Base Class does not correctly override Base pure virtual method

Derived Class of Abstract Base Class does not correctly override Base pure virtual method


By : user2638380
Date : March 29 2020, 07:55 AM
I wish this help you The signatures don't match so you don't override anything. Look up the override keyword to get your compiler to help you diagnose errors like this.
code :
add(const Foo<T>* rhs)
add(const Doo<T>* rhs)
Can abstract class be override in derived class without implementing in base class

Can abstract class be override in derived class without implementing in base class


By : Airul Fmy
Date : March 29 2020, 07:55 AM
With these it helps You would need to mark class B as an abstract class as well if it's not going to implement all of the abstract members of its base class. Then, just override as normal in class C.
Example:
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