Re: Circular ".h" files

[Norberto Eiji Nawa]

Hello Doug,

I found this in the Apple's Objective C documentation
(http://developer.apple.com/techpubs/macosxserver/ObjectiveC/index.html):

"PREPROCESSOR DIRECTIVES

  The preprocessor understands these new notations:
  

Notation and Definition

  #import

       
     Imports a header file. This directive is identical to #include,
except that it won't include the same file more than once."

So using "#import <myheader.h>" instead of "#include <myheader.h>"
should avoid circular references.

Hope it is a useful piece of information.

Eiji

donalson> In C++ there is a way to avoid the problems with circular ".h" file
donalson> references by using
donalson> #ifndef LISTMEMBER_H
donalson> #define LISTMEMBER_H
donalson> //contents of .h file here
donalson> #endif
donalson> Is there any similar method in ObjC?
donalson> Cheers,
donalson>    D3

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