From:	johne AT parallax DOT co DOT uk (John Eccleston)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Funky include files
Date:	Tue, 18 Feb 97 08:51:25 GMT
Organization:	Parallax Solutions Ltd
Message-ID:	<856255890.343812@red.parallax.co.uk>
References:	<19970217 DOT 174351 DOT 7567 DOT 2 DOT fwec AT juno DOT com>
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To:	djgpp AT delorie DOT com
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Mark wrote:

>Here's my problem...
>(please don't comment on my programming form, I know it needs work)
>

[Code snipped]

>
>As you can see, these two classes are friends of each other.
>This means that each has a reference to the other within its
>definition.  Before lindef will mean anything to the compiler, 
>the class has to be defined.  So I put lindef in front of vertex.
>
>Now, of course, when the compiler gets to vertex, lindef means
>nothing, so I get an error.  If I switch them, the same thing will
>happen.
>
>What can I do?
>
>Can you make the compiler do more than one pass?
>
>HELP?
>
>TIA
>
>-Fwec
>

Hi Mark,

Try using a forward declaration (before declaring class vertex) thus:

class lindef;

Which will tell the compiler that a definition will follow and should
get around your problem.

Hope this helps

John
  

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