Path: news.daimi.aau.dk!glad
From: Benny Amorsen <amorsen@peseta.daimi.aau.dk>
Newsgroups: comp.lang.beta
Subject: Re: Fragment system
Date: 13 Jun 1996 13:57:21 +0200
Organization: DAIMI, Computer Science Dept. at Aarhus University
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References: <y03pw767b5w.fsf@iota.iesd.auc.dk>
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>>>>> "JC" == Joern Heideman Christiansen <jonne@iesd.auc.dk> writes:

[..]
JC>   A : (# bRef : ^B; ... #)
JC>   B : (# aRef : ^A; ... #)
[..]
JC>   In A's file: INCLUDE 'bFile';
JC>   In B's file: INCLUDE 'aFile';

JC> which can't be done....

JC> The only solution I have managed to find so far is to include both
JC> classes in the same file, which is not desirable in this case.

---------------
start:
ORIGIN  '~beta/basiclib/current/betaenv';
INCLUDE 'a';
--program: Descriptor --
(# C: ^A;
   D: ^B #)

a:
ORIGIN '~beta/basiclib/current/betaenv';
BODY 'abody';
--lib: Attributes --
A: (# private: @<<SLOT Aprivate: Descriptor>> #);

abody:
ORIGIN 'a';
INCLUDE 'b';
-- Aprivate: Descriptor --
(# Bref: ^B #)

b:
ORIGIN '~beta/basiclib/current/betaenv';
BODY 'bbody';
--lib: Attributes --
B: (# private: @<<SLOT Bprivate: Descriptor>> #);

bbody:
ORIGIN 'b';
INCLUDE 'a';
-- Bprivate: Descriptor --
(# Bref: ^A #)
---------------

Det her kan compile... Det er ikke sikkert det er en løsning til dit
problem, men jeg har oplevet, at det gør den slags problemer
mindre. Altså flyt den gensidige afhængighed ud i
implementationsfiler, så den enes implementation afhænger af den
andens interface.

Det er ikke perfekt, men det hjælper.


Benny

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