See the pre-print and slides here:
http://ashishagarwal.org/2011/10/04/pdf-type-theory/
Basically, the author describes a DSL for describing statistical
distributions, and programming techniques for turning those
descriptions into random number generators. This is something I've
been looking for,
On Wed, Jan 15, 2014 at 5:28 AM, Paul Bennett wrote:
> See the pre-print and slides here:
>
> http://ashishagarwal.org/2011/10/04/pdf-type-theory/
>
> Basically, the author describes a DSL for describing statistical
> distributions, and programming techniques for turning those
&
On Feb 25, 2014 8:08 PM, "Jeffrey Kegler"
wrote:
>
> Do not do either one.
>
I concur.
FWIW, I think my current version of Marpa.tmLanguage does rely on some
whitespace to figure out the highlighting rules, because it's easier to do
the regexes. I'll add it to The Big List Of Stuff To Fix. Oh, a
On Feb 25, 2014 8:25 PM, "Jeffrey Kegler"
wrote:
>
> @Paul: While you're online, I've a question for you. You spoke of a
Python port at one time. Did you have in mind Python 2 or 3? -- jeffrey
>
My preference would be both / either / let-the-user-choose. Since (when I
pick the project back up)
I've had a sleepless night, so I've been tinkering with code.
Among my efforts is the latest MarpaX::SGML at
https://github.com/PWBENNETT/MarpaX-SGML
Forewarning: I tend to do a lot of what Abelson and Sussman refer to
as "programming by wishful thinking". Don't expect this code to run,
and if it
On Wed, Feb 26, 2014 at 12:05 PM, Jeffrey Kegler
wrote:
> Looking at it, I noticed there seems to be no test suite. Test suites are
> worth the trouble.
Test suites for SGML parsing are are _hard_. I've tried getting one
going using "vanilla" Docbook, and I can't quite get my thoughts in
place t
Yesterday, I was approached at work about the possibility of leading a
seminar on Marpa . I feel thrills of excitement and of terror in equal
proportion, but I'm going to start penciling together a few slides and
see how it goes.
I wonder whether any of the luminaries in the field (e.g. Ron, JD, a
By the sound of it, I'll have plenty to draw on, or even just use, for
my lessons (and it's turning into multiple lessons for sure) at work.
This project really has some of the best community members of anything
I've been involved in. You all rock like rockstars!
For the record, my two more-or-le
On Wed, Jun 18, 2014 at 12:01 PM, Jeffrey Kegler
wrote:
> Thanks for doing this. Reading even unfinished presentations is helpful to
> me, because I come to Marpa from the viewpoint of 1970's parsing theory, and
> so what most people need explaining and what does not is very hard for me to
> figu
On Wed, Jun 18, 2014 at 8:01 PM, Jeffrey Kegler
wrote:
> Grune & Jacobs suggest that "::=" be read as "may be replaced by". I'll
> often read it as "produces".
All,
I've taken a number of your suggestions on board (as well as some
other thoughts). The URL for the presentation-in-progress remain
Hi all,
I've started working here https://gist.github.com/PWBENNETT/8435996 on
a practical grammar for the language described here
http://ashishagarwal.org/2011/10/04/pdf-type-theory/
Trouble is, I don't (yet) understand the math in the above paper well
enough to know whether I'm actually on the
On Sun, Jul 20, 2014 at 10:06 AM, Ruslan Shvedov
wrote:
> Hi Paul, here are my 2cents on this, in no particular order
>
> C style #include's — aren't they supposed to be processed before parsing the
> program? The grammar has actions for include's, but I honestly can't see how
> you are going to i
>> In the paper's if X then Y else Z, X seems to be a (bound) variable (not
>> sure if/how they convert it to boolean, perhaps by whether it has PDF or
>> not), while it is a comparison in the grammar.
>
> The name "comparison" is just a notational thing for my convenience.
> Oh, but yes. Yes, inde
On Jul 21, 2014 1:04 AM, "Ruslan Shvedov" wrote:
>
> A couple of nits on the updated grammar:
>
> 1
>
>> Expression ::= Value
>
>
> and, later,
>
>> Value:
>>>
>>> ...
>>>
>>> | Expression action => eval
>>>
>>> ...
>
>
> This alternative looks redundant.
Well, I'm not entirely sure at this point
Well, how about that? I was just going to SWIG the low-level C code,
and build a method-compatible API suite on top. I'll have to check out
this guy's work for sure.
On Sun, Nov 9, 2014 at 9:55 PM, Jeffrey Kegler
wrote:
> [ Warning: family unfriendly repo name ]
>
> If you've been following the I
On Tue, Nov 11, 2014 at 5:09 PM, Ron Savage wrote:
> https://en.wikipedia.org/wiki/OPML
Interesting, and I suspect JD will have things to say.
For me, it's just a sad reminder that my SGML implementation hasn't
been worked on in far too long.
I really need to get into a room with JD, a couple o
On Fri, Nov 20, 2015 at 4:33 PM, Jeffrey Kegler
wrote:
> Kind of nice the way that the colors distinguish G1 and L0 rules.
I haven't played with my TextMate / SublimeText highligher for Marpa
in a long time. I agree it's a nice touch. I'm looking at implementing
the exact same thing right now. P
On Sat, Nov 21, 2015 at 2:09 PM, Paul Bennett wrote:
> I'm looking at implementing the exact same thing right now.
https://gist.github.com/PWBENNETT/0e860d907fc59554f1ce
--
Paul
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On Sat, Nov 21, 2015 at 3:17 PM, Paul Bennett wrote:
> https://gist.github.com/PWBENNETT/0e860d907fc59554f1ce
Ooh, I don't support comments with that. Working on it.
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On Sat, Nov 21, 2015 at 3:35 PM, Paul Bennett wrote:
>
> Ooh, I don't support comments with that. Working on it.
>
Here, and in its semi-proper location instead of as a gist ...
https://github.com/PWBENNETT/MarpaX-SGML/blob/master/Marpa.tmLanguage
--
Paul
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On Sat, Nov 21, 2015 at 3:42 PM, Paul Bennett wrote:
> https://github.com/PWBENNETT/MarpaX-SGML/blob/master/Marpa.tmLanguage
And here it is in action:
https://drive.google.com/file/d/0B21ee_I1WzbwNFlVdXE5T2dMQnM/view?usp=sharing
Apologies for the many emails. I'm growing too accus
Is there such a document?
My specific scenario...
I have a grammar broken up into chunks (corresponding more or less
with similarity of meaning in the official SGML spec) at
https://github.com/PWBENNETT/MarpaX-SGML/tree/master/lib/MarpaX/SGML/Grammar
My specific question...
Within each file, is
On Nov 22, 2015 4:10 PM, "Ron Savage" wrote:
>
> I always try to write the ::= rules top-down, and then list the ~ rules
alphabetically. This has turned out very well, for me at least.
>
Sounds sensible. In my (admittedly gargantuan) grammar linked above, do any
of you have specific examples of w
Work has finally begun in earnest on my log analyzer that I promised
to work on "one day" back when I started to get into Marpa .
There's not much to see yet, aside from one work-in-progress "input
config" file. Input config spec coming soon -- as soon as I've nailed
down what input specs need to
On Oct 15, 2016 13:01, "Jeffrey Kegler"
wrote:
>
> Re #4, why not implement Perl regexes? A full syntax of Perl regexes is
gruesomely complex, and much of it is symptoms rather than features.
Somewhere deep within perldoc there's a howto on making your own \p{} named
properties, which AFAICT are
:discard ~
whitespace ~ [\p{Separator}]+
S ::= H B J
H ::= 'Very' H
| 'Happy'
B ::= 'Birthday,'
J ::= 'Illustrious Idiosyncrat'
| 'Jeffrey'
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I'm writing a tinylang. One of the things the lang needs is a token
"XPath", which parses as per the w3c XPath spec, which is highly different
to the rest of the language spec. I plan to approach it by writing two
grammars. It seems the words for me to grep the pod for are "pause" and
"expect" if I
Any good examples of mixing grammars? In my "main" grammar I have :discard
~ whitespace (etc), but in the XPath spec whitespace seems to be
significant. I'm obviously behind the times ...
I guess I could use "..." around my XPath expressions and treat them as
blind strings handled by the semantics
e Greater Good, so
to speak.
Thanks for your guidance,
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P/PW/PWBENNETT
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