DevX Tips Bank: Virtual Functions

Calling a Virtual Method from a Non-Virtual Method

How can you tell which f2() will be invoked:

Pure Virtual Functions Declared as Private in C++ Classes

How can a pure virtual function be private? Will the derived class be able to override it? …

Using a Function Call as an Lvalue

Learn how to use a function call as an Lvalue.

Visual Inheritance with C#

Microsoft VS.NET provides design-time support for form inheritance. A derived form can be …

When to Use Virtual Functions

This tip demonstrates how to use virtual functions when you override a base method.

Qualified Calls

A function call such as the ...

Inlining Virtual Member Functions

Generally, compilers can't inline a virtual function call if the it's resolved …

Virtual and Non-Virtual

Why would a call to a virtual function execute slower than a call to a non-virtual …

Calling a Virtual Member Function From a Constructor

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To Virtual Or Not To Virtual?

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The Importance of Virtual Destructors

Some classes in the Standard Library do not have a virtual destructor or virtual member …

Preventing Program's Crash due to a Pure Virtual Function's Call

A pure function should never be invoked. However, a buggy program or a buggy compiler …

Converting a Virtual Member Function to a Pure Virtual One in a Derived Class

In general, a derived class that inherits a pure virtual member function from its …

Accessing a C++ Object in C Code: Support for Virtual Member Functions

In the case of virtual functions, an additional member is inserted into the class: a …

Simulating Virtual Constructors

A constructor may not be declared virtual. The easiest way to simulate virtual …