Message 56
Re: 15-721: scan.o in libwithout.a?
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Date: Sat, 06 Oct 2001 19:53:00 -0400
From: Spiros Papadimitriou <spapadim+@cs.cmu.edu>
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To: Bartosz Przydatek <bartosz@cs.cmu.edu>
Cc: bb+academic.cs.15-721@andrew.cmu.edu
Subject: Re: 15-721: scan.o in libwithout.a?
References: <Pine.LNX.3.95L.1011006182731.10321A-100000@ux10.sp.cs.cmu.edu>
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Yes, that is right... I mentioned this in a previous email--in more
detail, the suggested workaround is for you to do sth like:
class HeapFile {
friend class MyScan;
// ...
};
class MyScan : public Scan {
// Implement public methods, completely
// shadowing(and ignoring) Scan
// ...
}
Scan *HeapFile::openScan (Status &s) {
MyScan *rval = new MyScan (...);
// ...
return rval;
}
If scan.o wasn't in there, you'd actually have to declare all private
members in Scan in your class (and to add more you'd have to
modify the declaration of class Scan {...} so...). It is ugly, but... :-)
Hope this helps!
Spiros
Bartosz Przydatek wrote:
>Hi!
>
>Apparently, the library libwithout.a contains also object code
>for the Scan class (scan.o), which seems to disturb the linker,
>since it conflicts with our implementation of Scan-methods.
>How should we proceed with it?
>
>Thanx,
>
>- Bartosz.
>
>