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Date: Wed, 10 Oct 2012 11:41:01 +0100
Subject: Re: Generating C++ code
From: andrea crotti <andrea.crott...@gmail.com>
To: Jean-Michel Pichavant <jeanmic...@sequans.com>
Cc: python-l...@python.org
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2012/10/10 Jean-Michel Pichavant <jeanmic...@sequans.com>:
> Well, the C++ code will end up running on a MIPS on a SOC, unfortunately,=
 python is not an option here.
> The xml to C++ makes a lot of sense, because only a small part of the cod=
e is generated that way (everything related to log & fatal events). Everyth=
ing else is written directly in C++.
>
> To answer Andrea's question, the files are regenerated for every compilat=
ion (well, unless the xml didn't change, but the xml is highly subject to c=
hanges, that's actually its purpose)
>
> Currently we already have a python script that translate this xml file to=
 C++, but it's done in a way that is difficult to maintain. Basically, when=
 parsing the xml file, it writes the generated C++ code. Something like:
> if 'blabla' in xml:
>   h_file.write("#define blabla 55", append=3D"top")
>   c_file.write("someglobal =3D blabla", append=3D"bottom")
>
> This is working, but the python code is quite difficult to maintain, ther=
e's a lot of escaping going on, it's almost impossible to see the structure=
 of the c files unless generating one and hopping it's successful. It's als=
o quite difficult to insert code exactly where you want, because you do not=
 know the order in which the xml trees are defined then parsed.
>
> I was just wondering if a template engine would help. Maybe not.
>
> JM
> --
> http://mail.python.org/mailman/listinfo/python-list


I think it depends on what you're writing from the XML, are you
generating just constants (like the #define) or also new classes for
example?

If it's just constants why don't you do a generation from XML -> ini
or something similar and then parse it in the C++ properly, then it
would be very easy to do?

You could also parse the XML in the first place but probably that's
harder given your requirements, but I don't think that an ini file
would be a problem, or would it?