[Echempp-devel] segment factory

[<ber...@t-...>]

Dear all,

I started the implementation of a SegmentFactory, which can generate
segments given a string defining the type of the segment. This would be 
needed for loading segment information from a file. Here is a 
preliminary status report.
I started with the Loki::Factory template of Alexandrescu. 
Unfortunately, as we can expect, not everything is straightforward, when 
we apply this to Segments.
First of all, the segment classes are templates (D and I are the 
parameters!). This means that the registration of the segment with the 
factory and the definition of the ID string must also be templated. I 
have not yet solved this problem in a fully satisfying way, but I can 
indeed do registration.
A second problem will be that the create member function (which actually 
generates the new object according to the string ID) in our case needs a 
parameter (i.e., the istream from which it can get additional 
information about the object to be built - namely the segment 
parameters). This is not possible in the Loki::Factory implementation.
I'll continue with this.
Regards
Bernd

-- 
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Bernd Speiser
Institut f"ur Organische Chemie
Auf der Morgenstelle 18
D-72076 T"ubingen
Germany
phone: +49-7071-2976205 (office) +49-7071-2976242 (laboratory)
fax:   +49-7071-295518
e-mail: ber...@un...
Internet: http://www.uni-tuebingen.de/speiser
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