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From: | Rob Vermaas |
Subject: | Re: Octave compiler |
Date: | Mon, 27 Sep 2004 14:19:17 +0200 |
User-agent: | Mozilla Thunderbird 0.7.3 (X11/20040830) |
Hi,Sorry for the late response, but I've been quite busy in the meanwhile, as I found some of your remarks a good excuse to do some cleaning up and rewriting of the code of the compiler.
You are right that nearly all builtin function work. So mainly builtin functions that depend on the interpreter related things do not work completely.What are the problems you face when supporting built-in functions? The code for those functions already exists, so shouldn't you be able to link to liboctinterp/liboctave and have nearly all of them work?
I have followed your advise on writing a tree_walker implementation. It is nearly finished and works well.I looked at the parser, and it seems you have adapted Octave's lexer and parser. I think this is a good idea, as it makes little sense to develop a separate parser from scratch. However, the code in Octave is likely to change, so if you fork your own version, you are likely to have a maintenance problem in the future. Would you like to help introduce changes to Octave's parser so that it would be easier to generate what you need without having to rewrite the actions part of the paresr? It migth be possible to do that now, without any changes to Octave, by writing a new new class based on Octave's tree_walker class (in src/pt-walk.h) that can take Octave's tree representation of the input and emit whatever you need for your front end. That way, any changes to Octave's language in the parser/lexer would require fewer changes to your code.
As I changed to using more of the internals of Octave, these lists have become redundant, therefore it is not necessary for us to generate them.The front end appears to have a list of built-in functions and variables. How do you generate this list? Would you like to contribute or help write patches to Octave's build system so that you can generate this information automatically for new versions of Octave?
greetings, Rob Vermaas
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