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Questions - friend

How to grant friend class access to value of modified member

What is the proper method to grant class access to modified value of private member of different class. Using Friend Class is granting me access to value of private member if provided but won't let me...
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Surfer Boy

c++

function

class

member

friend

Votes: 0

Answers: 2

Latest Answer

It seems you mean something like the following void Bar::Print( Foo &obj ) { std::cout << obj.k << std::endl; std::cout << obj.m_vector[0] << std::endl; } and call...
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Vlad from Moscow

Can a base class and a derived class of that base class have a common friend class which is a friend of both the classes?

I know that a friend class can access the private elements of a class, so I was wondering weather a derived class can use a friend class to access the private members of the base class, if the friend ...
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Pkun

c++

oop

friend

Votes: 0

Answers: 2

Latest Answer

In C++, In order to grant access to private or protected members of a class, we should define a friend class or a function (or a method of another class). Friendship is not inherited. So in order to ...
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Ahmet Erdem

Invoke overridden virtual methods of a derived class without exposing them

I would like to write a function f which invokes two overridden virtual methods, op_1 and op_2, of a derived class in a particular order, without exposing those methods beyond f and the methods' conta...
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Manningham

c++

inheritance

encapsulation

friend

maintainability

Votes: 0

Answers: 1

Latest Answer

Let's start from #3: friend breaks encapsulation and that's why Scott Meyers doesn't suggest it. I also don't suggest it unless you really need it. Eg: CRTP's private contstruct + friend trick to prev...
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Louis Go

how to order the definitions and declaration of class and friend function?

I have a function that is friend of a class. Therefore the function can access all class member. However, I am confused with the order of definition. If the function comes before the class then how do...
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jojo_Aero_smith_the_dummy

c++

friend

Votes: 0

Answers: 1

Latest Answer

Declare CommonUtility::HandleToGraph before the definition of BP_Interface and define it later. namespace CommonUtility { void HandleToGraph(Handle& eR); } class BP_Interface { friend void...
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songyuanyao

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