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Please Help: Objective-C++ / C++ mix and public inheritance
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Please Help: Objective-C++ / C++ mix and public inheritance


  • Subject: Please Help: Objective-C++ / C++ mix and public inheritance
  • From: Jesse Thompson <email@hidden>
  • Date: Sun, 4 Jul 2004 17:34:01 -0700

I'm a CS student and am currently taking a computer graphics course.
Our term project can be written in C or C++, but I've chosen C++
because I *need* to be able to create objects. I've decided to write a
GUI front-end in Cocoa / Objective-C++, and my professor said that
that would be fine as long as the GUI is the only thing written in
Objective-C++.

Okay, don't want to waste anymore of your time so I'll get right into
it. For some odd reason, inheritance in my C++ classes works just
fine, as long as I don't try to inherit anything protected. For
example:

class A {
public:
A();
protected:
int blah;
};

class B : public A {
public:
B( blah = 1; }
};

Now this works just fine if I don't #include the cocoa libraries from
within main.mm, but I *have* to #import <Cocoa/Cocoa.h> for return
NSApplicationMain(argc, ( const char **)argv); to work. Is this a bug
in Cocoa / Objective-C++, or is there something I"m missing. Also, in
referring to the above example, if <blah> is public, then it works
just fine... Can't seem to figure it out.

Thanks for your help and time.
Jesse Thompson
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