Re: Objective-C++ Instance Variables

In article <oster-06D6C8.20465203072008@[EMAIL PROTECTED]
>,
 David Phillip Oster <oster@[EMAIL PROTECTED]
> wrote:

> In article <woody-33200E.17164003072008@[EMAIL PROTECTED]
>,
>  William Woody <woody@[EMAIL PROTECTED]
> wrote:

> > Note that this implies that you either #include the C++ header in your

> > Objective C header, or you need to declare the CPPClass in the
Objective 
> > C header as a anonymous C++ class. In either case, this means you can 
> > only #im****t your Objective C header in a .mm file.
> 
> Not So! Remember that in C++ 'struct' is the same as 'class' except in a

> 'struct' all the members default to public.  So, you can forward declare

> in your Obj-C.h file:
> 
> typedef struct CPPClass CPPClass;
> 
> this lets you include your .h file in a .c file just fine.

True 'nuff; however, I always get nervous doing that because at some 
point the C++ compiler will see:


typedef struct CPPClass CPPClass;

....

class CPPClass {
....
};

My fear is that someday some compiler will ***** with the 'struct 
CPPClass'/'class CPPClass' mismatch. Semantically 'struct' == 'class' 
for now, but I've been bit in the past by similar issues where the 
semantics subtly changed over time.


Call me conservative to the point of paranoid about such things... :-)

-- 
William Edward Woody   -   woody@[EMAIL PROTECTED]
 In Motion        -   http://www.chaosinmotion.com

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