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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998)
originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds
* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
* with significant contributions from:
Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
<HTML>
<HEAD>
<TITLE>Objects</TITLE>
<META NAME="description" CONTENT="Objects">
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<H1><A NAME="SECTION00030000000000000000"> </A><A NAME="69"> </A><A NAME="object"> </A>
<BR>
Objects
</H1>
<P>
<code>object</code> is an abstract base class, from which all objects stored
in the graph must be derived. A synopsis of the ABC is:
<PRE>
class object: public Ptrlist
{
public:
/* serialisation methods */
virtual void lpack(pack_t *buf)=0;
virtual void lunpack(pack_t *buf)=0;
/* virtual "constructors" */
virtual object* lnew() const=0;
virtual object* lcopy() const=0;
virtual ~object() {}
virtual int type() const=0; /* return index into archetype table */
/* partition weightings - redefine in derived type if needed */
virtual idxtype weight() const {return 1;}
virtual idxtype edgeweight(const objref& x) const {return 1;}
};
</PRE>
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<LI><A NAME="tex2html77"
HREF="node6.html">Serialisation methods</A>
<LI><A NAME="tex2html78"
HREF="node7.html">Virtual Constructors</A>
<LI><A NAME="tex2html79"
HREF="node8.html">Run Time Type Identification</A>
<LI><A NAME="tex2html80"
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<BR><HR>
<ADDRESS>
<I>Russell Standish</I>
<BR><I>2007-03-13</I>
</ADDRESS>
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