CObject Class

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4.50/5 (6 votes)

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C++

MFC

Why is CObject the base class for the majority of MFC classes?

Posted 12-Jul-10 22:09pm

Pryabu

Updated 13-Jul-10 6:17am

Nish Nishant

v2

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4 solutions

Solution 3

What difference does it make *-why* CObject is the ultimate base class. It simply is, and there's nothing you can do about it.

Posted 13-Jul-10 1:50am

#realJSOP

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CPallini · Accepted Answer · 2010-07-12T22:31:00

Solution 1

What is the point of your question?
Are you asking about the usefulness of a single rooted classes hierarchy?
Are you asking if CObject fits well as MFC root class?
Or are you worried about "CObject" as root class name?
:)

Posted 12-Jul-10 22:31pm

CPallini

Comments

Nish Nishant 13-Jul-10 12:15pm

Reason for my vote of 5
Good answer, and worth a 5!

Aescleal · Accepted Answer · 2010-07-12T23:45:00

Simple answer - it's not.

The answer to "why did Microsoft think it was a good idea in MFC to derive (almost) everything from CObject?" is probably that they thought it was a good idea at the time.

Back in 1991 the C++ implementation they had to play with was a pretty unsophisticated C++ compiler (no templates, namespaces and exceptions) and some of the features of CObject were really to overcome the lack of features and lack of experience of using C++. This includes things like dynamic creation and base class pointer collection classes.

Cheers,

Ash

Eugen Podsypalnikov · Accepted Answer · 2010-07-14T05:16:00

Solution 4

From CObject Class (MFC)[^] on MSDN:

CObject provides basic services, including:
- Serialization support
- Run-time class information
- Object diagnostic output
- Compatibility with collection classes

...it could be venerated :)

Posted 14-Jul-10 5:16am

Eugen Podsypalnikov

Updated 14-Jul-10 5:22am

v2