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and subject line Bug#290729: graphviz: Nice class diagram doesn't display
template-based classess
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From: Janek Kozicki <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: graphviz: Nice class diagram doesn't display template-based classess
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Date: Sun, 16 Jan 2005 11:01:43 +0100
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Package: graphviz
Version: 1.16-1
Severity: important
First of all - graphviz is really great package, together with kdevelop
it makes all the developing work a lot easier.
I rate this bug important, because purpose of graphviz is to display
class diagrams. And not displaying some parts of whole class hierarchy
is .. um - important bug ;)
Ok, so a class that inherits from template class is quietly ignored, and
not displayed on the diagram. At least I should expect some warning.
Concrete example:
// file Singleton.hpp
template <class T>
class Singleton
{
public:
static T& instance()
{
static T obj;
return obj;
}
protected:
Singleton() {};
~Singleton() {};
private:
Singleton(const Singleton&);
Singleton& operator=(const Singleton&);
};
// file Factory.hpp
class Factory : public Singleton< Factory >
{
/* ... */
}
////
Singleton is a well known C++ design pattern, by the way ;) And really
useful. So ignoring class derived from it can be sometimes really
confusing, as I'm looking onto the diagram and can't find some of my
classes.
How to handle that? Each template instatination is a separate type.
Three possible solutions I see. Suppose I have also another
class Omega : public Singleton<Omega>; then:
1.
Singleton<Omega> Singleton<Factory>
| |
Omega Factory
The base class Singleton<Factory> is different than base class
Singleton<Omega>
2.
Singleton
/ \ --------- (*)
/ \
Singleton<Omega> Singleton<Factory>
| |
Omega Factory
(*) those lines could be dotted to indicate relationship other than just
inheritance. In fact this is a "template instatination" relationship
3.
Singleton
/ \
/ \ --- same here - dotted lines would be better
| |
Omega Factory
Personally I'd prefer solutions 1. or 2. Maybe there are other
solutions, I can't think of now :))
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.4.26
Locale: LANG=pl_PL, LC_CTYPE=pl_PL (charmap=ISO-8859-2)
Versions of packages graphviz depends on:
ii libc6 2.3.2.ds1-20 GNU C Library: Shared libraries an
ii libexpat1 1.95.8-1 XML parsing C library - runtime li
ii libfontconfig1 2.2.3-4 generic font configuration library
ii libfreetype6 2.1.7-2.3 FreeType 2 font engine, shared lib
ii libice6 4.3.0.dfsg.1-10 Inter-Client Exchange library
ii libjpeg62 6b-9 The Independent JPEG Group's JPEG
ii libpng12-0 1.2.8rel-1 PNG library - runtime
ii libsm6 4.3.0.dfsg.1-10 X Window System Session Management
ii libx11-6 4.3.0.dfsg.1-10 X Window System protocol client li
ii libxaw7 4.3.0.dfsg.1-10 X Athena widget set library
ii libxext6 4.3.0.dfsg.1-10 X Window System miscellaneous exte
ii libxmu6 4.3.0.dfsg.1-10 X Window System miscellaneous util
ii libxpm4 4.3.0.dfsg.1-10 X pixmap library
ii libxt6 4.3.0.dfsg.1-10 X Toolkit Intrinsics
ii tcl8.4 8.4.9-1 Tcl (the Tool Command Language) v8
ii tk8.4 8.4.9-1 Tk toolkit for Tcl and X11, v8.4 -
ii xlibs 4.3.0.dfsg.1-10 X Keyboard Extension (XKB) configu
ii zlib1g 1:1.2.2-3 compression library - runtime
-- no debconf information
---------------------------------------
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Date: Tue, 1 Feb 2005 14:00:12 -0700
From: Stephen M Moraco <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Cc: Janek Kozicki <[EMAIL PROTECTED]>
Subject: Re: Bug#290729: graphviz: Nice class diagram doesn't display
template-based classess
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Janek,
The graphviz tool does not scan your sourcecode. You must be using
another tool which scans your source code and then invokes graphviz
to generate the graphs.
I believe the problem exists in the scanner, not in graphviz.
Please file this against the tool which is scanning your source-code.
Regards,
Stephen
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