Click here to Skip to main content
12,510,224 members (51,021 online)
Click here to Skip to main content
Add your own
alternative version

Tagged as

Stats

12.5K views
66 downloads
4 bookmarked
Posted

Emulation of CRuntimeClass for non-CObject derived classes

, 20 Feb 2010 CPOL
Rate this:
Please Sign up or sign in to vote.
MACROs having advantage of CRuntimeClass for non-CObject derived classes.

Introduction

Let's assume you decided to create a hierarchy of non-CObject derived classes using the CRuntimeClass of MFC libraries (and DECLARE_DYNAMIC IMPLEMENT_DYNAMIC DECLARE_DYNCREATE IMPLEMENT_DYNCREATE as well). It is implied that your base class is named like CXxx (C + class prefix) and all your child classes have names according to the rule: C+ class prefix + kind_name (for example, CXxxCool, CXxxAdvanced, CXxxSuper etc.). You need to have a static function Create(string kind_name) to create objects at runtime and a function GetKind returning a string with a 'kind_name' of the object.

Background

Unlike CRuntimeClass (actually it is a structure), our 'CKindOf...' class exists as MACROs DECLARE_KIND_OF(class_name) and IMPLIMENT_KIND_OF(class_name), and every generated 'KindOf' class corresponds with a given class hierarchy.

DECLARE_KIND_OF(Xyz)

IMPLIMENT_KIND_OF(Xyz)

Using the code

The base class of your hierarchy should use the DECLARE_BASE_DYNCLASS(class_name) and IMPLIMENT_BASE_DYNCLASS(class_name) MACROs.

class CXyz
{

public:
    CXyz();
DECLARE_BASE_DYNCLASS(Xyz)
};

IMPLIMENT_BASE_DYNCLASS(Xyz)
CXyz::CXyz()
{

}

And every child class should use DECLARE_CHILD_DYNCLASS(class_name,kind_name) and IMPLIMENT_CHILD_DYNCLASS(class_name,kind_name,parent_name).

class CXyzCool:public CXyz
{
  DECLARE_CHILD_DYNCLASS(Xyz,Cool)
};

IMPLIMENT_CHILD_DYNCLASS(Xyz,Cool,Base)

class CXyzAdv:public CXyzCool
{
  DECLARE_CHILD_DYNCLASS(Xyz,Adv)
};

IMPLIMENT_CHILD_DYNCLASS(Xyz,Adv,Cool)

If your child class is derived directly from the base class (the second level in the class hierarchy), use the 'Base' keyword as the third argument.

IMPLIMENT_CHILD_DYNCLASS(Xyz,Cool,Base)

And the prefix of the base class otherwise:

IMPLIMENT_CHILD_DYNCLASS(Xyz,Adv,Cool)

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

cyberanarchist
Software Developer (Senior) Elstab
Uzbekistan Uzbekistan
No Biography provided

You may also be interested in...

Pro
Pro

Comments and Discussions

 
GeneralDerived class name for non-CObject derived classes Pin
geoyar23-Feb-10 7:29
membergeoyar23-Feb-10 7:29 
GeneralRe: Derived class name for non-CObject derived classes Pin
Rishat Bekmukhamedov23-Feb-10 19:26
memberRishat Bekmukhamedov23-Feb-10 19:26 
GeneralRe: Derived class name for non-CObject derived classes Pin
geoyar25-Feb-10 4:31
membergeoyar25-Feb-10 4:31 
GeneralRe: Derived class name for non-CObject derived classes Pin
Rishat Bekmukhamedov26-Feb-10 2:02
memberRishat Bekmukhamedov26-Feb-10 2:02 
GeneralSome Explaination Pin
JohnWallis4221-Feb-10 10:11
memberJohnWallis4221-Feb-10 10:11 
GeneralRe: Some Explaination [modified] Pin
Rishat Bekmukhamedov21-Feb-10 16:41
memberRishat Bekmukhamedov21-Feb-10 16:41 
GeneralRe: Some Explaination Pin
JohnWallis4221-Feb-10 17:11
memberJohnWallis4221-Feb-10 17:11 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.160929.1 | Last Updated 21 Feb 2010
Article Copyright 2010 by cyberanarchist
Everything else Copyright © CodeProject, 1999-2016
Layout: fixed | fluid