CODEWITHSUNDEEP
c++objective-ccocoaimportinclude
toto_tata
toto_tata

Reputation: 15392

What is the C++ equivalent of Objective C "@class MyClassName"?

In the headers of my Objective-C classes, I use @class MyClassName to be able to use the MyClassName object in a defined class.

In Objective-C, there's a difference between @class MyClassName and #import MyClassName.h?

Does such a difference exist in C++?

The C++ equivalent of #import "MyClassName.h" is #include "MyClassName.h".

What is the C++ equivalent of Objective-C @class MyClassName ?

Upvotes: 3

Views: 822

Answers (3)

Saurabh Passolia
Saurabh Passolia

Reputation: 8109

The C++ equivalent of #import "MyClassName.h" is not #include "MyClassName.h"

"#import" also prevent cyclic inclusion of files for which in c++ we normally do 

#ifdef __abc.h__
#define __abc.h__

//actual code


#endif

Upvotes: 1

havexz
havexz

Reputation: 9590

yes there is such distinction in C++ too. In C++ it is called forward declaration. You forward declare a class like:

class ClassName;

Just to add extra info, forward declaration is used when you are using a class before it is declared. The compiler will be bit lenient and wont throw error but it still need the full class declaration later.

Upvotes: 1

Vladimir
Vladimir

Reputation: 170819

Forward declaration in c++ looks similar - just remove '@' from obj-c variant:

class MyClassName;

Upvotes: 8

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