Seeking advice re. implementing an interpreter in RPython
Hi Folks I'm probably in the wrong place, so I'll make this quick : ) I am working on an experimental programming language, and am considering building the next prototype of the interpreter in RPython. I just wanted to ask which mailing-list is the best one to join for help and advice on this topic? Thanks Tom
Hi Tom, On Thu, Jun 17, 2010 at 09:21:53AM +0100, Tom Locke wrote:
I'm probably in the wrong place, so I'll make this quick : )
You are not :-) Welcome. Feel free to ask here about RPython. You can also join #pypy on irc.freenode.net. A bientot, Armin.
Thanks for the welcome, and how nice it is to find a project on a European time-zone, and not have to wait for those sleepy Americans to wake up : ) By way of an introduction, did any of you guys notice "Logix" a few years back? On-the-fly syntax extension and lisp-ish macros for Python. I'm the guy that did that. Now abandoned sadly. I am building what you might call a macro language or a template language for code-generation. It is up and running in prototype form, but way too slow. I must confess to having jumped ship - I am mainly a Ruby guy these days, and the prototype is in Ruby. But RPython is interesting enough to perhaps bring me back - for this project at least - so congratulations for that. Amazing project. OK, to get down to business - I'll be starting with the parser. I notice there is a packrat parser in the rlib directory. If that is in a working state I'll be a happy man, as my existing grammar is for a Ruby packrat parser (Treetop). I am guessing that the 'r' in 'rlib' means RPython? Which I'm hoping means the packrat parser might be reasonably fast? Any pointers to getting started with the packrat parser (or some other if you don't advise that) much appreciated! Tom
Hi Tom, On 06/17/2010 11:19 AM, Tom Locke wrote:
Thanks for the welcome, and how nice it is to find a project on a European time-zone, and not have to wait for those sleepy Americans to wake up : ) By way of an introduction, did any of you guys notice "Logix" a few years back? On-the-fly syntax extension and lisp-ish macros for Python. I'm the guy that did that. Now abandoned sadly.
I am building what you might call a macro language or a template language for code-generation. It is up and running in prototype form, but way too slow.
I must confess to having jumped ship - I am mainly a Ruby guy these days, and the prototype is in Ruby. But RPython is interesting enough to perhaps bring me back - for this project at least - so congratulations for that. Amazing project.
OK, to get down to business - I'll be starting with the parser.
In general the PyPy attitude is that parsers are totally uninteresting.
I notice there is a packrat parser in the rlib directory. If that is in a working state I'll be a happy man, as my existing grammar is for a Ruby packrat parser (Treetop). I am guessing that the 'r' in 'rlib' means RPython?
Yes, that's correct.
Which I'm hoping means the packrat parser might be reasonably fast?
As I am wrote the stuff in the rlib/parsing directory I guess I should answer that. There are actually two different packrat-parsing approaches in the parsing directory. Both of them are not particularly polished or particularly fast. They might still be useful for you, but you have to try and see.
Any pointers to getting started with the packrat parser (or some other if you don't advise that) much appreciated!
There is this: http://codespeak.net/pypy/dist/pypy/doc/rlib.html#parsing Apart from that, you probably have to look at the code or the tests in rlib/parsing. Cheers, Carl Friedrich
On Thu, Jun 17, 2010 at 13:40 +0200, Carl Friedrich Bolz wrote:
On 06/17/2010 11:19 AM, Tom Locke wrote:
OK, to get down to business - I'll be starting with the parser.
In general the PyPy attitude is that parsers are totally uninteresting.
Luckily from time to time we have people who care, though. holger
On 06/17/2010 01:46 PM, holger krekel wrote:
On Thu, Jun 17, 2010 at 13:40 +0200, Carl Friedrich Bolz wrote:
On 06/17/2010 11:19 AM, Tom Locke wrote:
OK, to get down to business - I'll be starting with the parser.
In general the PyPy attitude is that parsers are totally uninteresting.
Luckily from time to time we have people who care, though.
Yes, luckily. Occasionally I am even one of them :-). Carl Friedrich
participants (4)
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Armin Rigo -
Carl Friedrich Bolz -
holger krekel -
Tom Locke