Steffen Märcker wrote
> I can send you that code.
Awesome. I'll email you. Although, I wonder how relevant this is given your
answers down below. Are there many grammars available in Xtreams syntax to
make this useful? Also, what is the license? Can I add it somewhere on GH
under MIT (with attribu
Dear Sean,
thanks for bringing this up and for the interesting link [1]. I'll have a
look. Meanwhile, I am still on both lists. ;-)
Steffen Märcker wrote
I wrote a PetitParserGenerator that takes the DSL and builds a
PetitParser.
I don't know how I could've missed this gem! I hope Steffen
I rediscovered this thread while pondering an (existential?!) problem:
Why do we keep having to write, and rewrite, and rewrite, ad infinitum,
parsers for well known domains like rfc specs? The parser world in many ways
feels like a modern post-"Tower of Babel". I was really excited about the
rev
Hi,
my current shot is to subclass IdentityDictionary with
NildentityDictionary. The class checks on indexed access whether the key
is nil. If so, storing/retrival uses a singleton Object as key (stored in
instance variable NIL := Object new). I needed to override at least:
>>at:ifAbsen
We will have the same issue porting PP2 to GemStone and look forward to
suggestions.
> On Oct 22, 2018, at 4:40 AM, Steffen Märcker wrote:
>
> Hi Jan,
>
> I am trying to port PP2 to VW and managed to get most of the tests green. =)
> Some of the remaining test failures occur in
>
> PP2Debugg
Hi Jan,
I am trying to port PP2 to VW and managed to get most of the tests green.
=) Some of the remaining test failures occur in
PP2DebuggingStrategy>>cacheIfNeeded:debugResult:
where a result of nil is to be stored in an IdentityDictionary. But in VW
Dictionaries do not accept nil as a k
HI Steffen,
Thanks for the report, number pleases me :)
Speaking of tool for porting, I was recently showed this one, I don't have
any experience with it:
https://github.com/ObjectProfile/Pharo2VW
Speaking of character ranges, there is currently available:
#letter asPParser (to recognize charact
Hi,
I gave PetitParser 2 a try and I am pretty impressed by the results,
please see the updated table below. =) Again, that's pure parsing and
Array-based AST-building. Moving to PP2 was indeed as easy as sending
#asPParser and working around character ranges ($a - $z). Is there a
preferr
Hi, I tried it some more times and things are different now:
- image appeared to lock up (1st)
- no network traffic at all (2nd)
- image unresponsive, loading successful after 2 minutes (3rd)
Call me a fool, but I didn't do anything different. Notably, it succeeded
each time in 7.0. =)
There i
I run PP2 on travis [1], seems Pharo 6.1 loads all configurations, both on
linux and mac. Pharo 5, Pharo 6.0 got broken, why is build configuration so
hard :'( I don't know, how can I support you. I myself had to gave up on
some tools, because I failed to load them.
There is no specific reason to
Kenny
-Original Message-
From: Pharo-users On Behalf Of Steffen
Märcker
Sent: 11 October 2018 16:11
To: pharo-users@lists.pharo.org
Subject: Re: [Pharo-users] [vwnc] Parsing in Smalltalk
I am using MacOS 10.13.6 and the 32bit VM:
Pharo 6.0
Latest update: #60546
... the String in abo
Reading the code of PetitParser, I wonder why PPRepeatingParser
initializes 'max' with SmallInteger maxVal instead of some notion of
infinity, like Float infinity (and PP2RepeatingNode as well). If I
understand the code correctly, PParser>>min: fails if the number of
repetitions exceeds Sma
I am using MacOS 10.13.6 and the 32bit VM:
Pharo 6.0
Latest update: #60546
... the String in about is wrong, it should be 6.1. I installed it via the
launcher as "Official Distribution: Pharo 6.1 - 32Bit (stable)" I just
noticed, that the sources file is missing from vms/private/6521/, too.
Steffen Märcker wrote
> I did the following:
> 1) Download and start Pharo 6.1 stable via the launcher.
> 2b) Attempt to install PP2 via the scripts from GitHub:
> Metacello new
> baseline: 'PetitParser2';
> repository: 'github://kursjan/petitparser2';
> load.
>
Can you give more details? IIRC I have PP2 loaded in several 6.
I did the following:
1) Download and start Pharo 6.1 stable via the launcher.
2a) Attempt to install PetitParser2 via the CatalogBrowser:
"Information
There was an error while trying to install PetitParser2.
Installatio
Steffen Märcker wrote
> 1. PP2 does not load into Pharo 6.1 stable.
Can you give more details? IIRC I have PP2 loaded in several 6.1 images.
-
Cheers,
Sean
--
Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html
Dear Jan,
I just tried to use PP2 but ran into two issues:
1. PP2 does not load into Pharo 6.1 stable.
2. I use #- to create character classes but was not able to find the
equivalent in PP2 yet.
There should be no fundamental issue with porting PP2 to VW. As far as I
know, there is an autom
#memoized is one of the most efficient and hardest optimizations. It cannot
be done efficiently in an automated way. It depends on input. Best way is
to identify repeated invocation of the same parser combinator at the same
position for a typical input, pp2 has a tooling support for this, I wrote a
Hi Doru!
I assume that you tried the original PetitParser. PetitParser2 offers
the possibility to optimize the parser (kind of a compilation), and this
provides a significant speedup:
https://github.com/kursjan/petitparser2
Would you be interested in trying this out?
Yes, I'd like to give
Hi Ben!
Thanks for your report Steffen. Nice to see such comparisons even when a
bit apples & oranges.
Will you be implementing those "additional verification and normalization
steps" ?
It seems they have an exponential or power impact on times.
I certainly will. Meanwhile, I have some more pr
If you have done a PRISM PP parser, maybe you can contribute it to the PP
community.
Thank you.
On Thu, Oct 4, 2018 at 9:47 PM Steffen Märcker wrote:
> I gave Xtreams-Parsing and PetitParser a shot and like to share my
> findings.[*]
>
> The task was to parse the modelling language of the probab
Hi,
Interesting experiment. Thanks for sharing!
I assume that you tried the original PetitParser. PetitParser2 offers the
possibility to optimize the parser (kind of a compilation), and this provides a
significant speedup:
https://github.com/kursjan/petitparser2
Would you be interested in tryi
Am .10.2018, 20:14 Uhr, schrieb Steffen Märcker :
> Dear all,
>
> I have two questions regarding parsing frameworks.
>
> 1) Do you have any insights on the performance of SmaCC VS Xtreams
> Parsing VS PetitParser?
> 2) Has anybody started to port PetitParser 2 from Pharo to VW? Is it
> worth the ef
I gave Xtreams-Parsing and PetitParser a shot and like to share my
findings.[*]
The task was to parse the modelling language of the probabilistic model
checker PRISM. I've written a grammer of about 130 definitions in the
Xtreams DSL, which is close to Bryan Fords syntax. To avoid doing it
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