Re: Help wanted - getting started writing an interpretter

  "Joachim Durchholz" <joachim_d@gmx.de> writes:
>You still have to write semantic actions on yacc, I don't think any tool
>will help you with that.


There are a number of attribute grammar and parse tree processor
generator tools. Most of them come with their own scanner and parser
generator, but Ox works with lex and yacc, and we use it in our
compiler course. Unfortunately, it is no longer supported by the
author, and its license prevents maintainence by other people (that's
in line with lex/yacc, but unfortunately there is no flex/bison
variant of ox).


>However, the following might help you with writing the bytecode
>interpreter:
>http://www.complang.tuwien.ac.at/anton/vmgen/
>Vmgen will take C code and a bit of metainformation for each
>instruction, and generate a VM for you. (At least that's what I
>understood from the docs, I haven't used it yet.)


Currently vmgen supports only threaded code (i.e., each virtual
machine opcode takes a machine word, not a byte). So if you want to
use bytecode for size reasons, vmgen needs some changes. Contact me
if you are interested and prepared to serve as testbed for these
changes.


- anton
--
M. Anton Ertl Some things have to be seen to be believed
anton@mips.complang.tuwien.ac.at Most things have to be believed to be seen
http://www.complang.tuwien.ac.at/anton/home.html

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