October 2018 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Pharo2VW (Was:[vwnc] Parsing in Smalltalk)
by Steffen MÃ¤rcker Oct. 24, 2018

Oct. 24, 2018

You're welcome. =) I really like the tool as it makes cross-platform-life a lot easier. I really wish there was a similar tool for the reverse direction, too! Cheers! Steffen Am .10.2018, 22:38 Uhr, schrieb Alexandre Bergel via Pharo-users <pharo-users(a)lists.pharo.org>: > Thanks Steffen for your contribution to Pharo2VW. > We reviewed and accepted your PullRequests. > > Alexandre > >> On Oct 19, 2018, at 6:29 AM, Steffen MÃ¤rcker <merkste(a)web.de> wrote: >> >> Nevermind, I figured it out easily. Must been blind before. >> >> Many thanks to the Iceberg team, the tool works like a charm in 6.1! >> >> >> Am .10.2018, 10:58 Uhr, schrieb Steffen MÃ¤rcker <merkste(a)web.de>: >> <---Schnitt---> >> > >

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Issue decoding source file
by Andrew Black Oct. 23, 2018

Oct. 23, 2018

Iâm getting a walkback while attempting to look at the prior versions of certain methods. It happens on some methods, but not all. I think the the issue may be related to having characters in the method body that are represented as multi-byte sequences in UTF-8. The error is 'Illegal leading byte for utf-8 encodingâ from ZnUTF8Encoder Here are the top few stack frames: ZnUTF8Encoder>>error: ZnUTF8Encoder>>errorIllegalLeadingByte ZnUTF8Encoder>>nextCodePointFromStream: ZnUTF8Encoder(ZnCharacterEncoder)>>nextFromStream: ZnCharacterReadStream>>nextElement ZnCharacterReadStream(ZnEncodedReadStream)>>peek SourceFile>>peek ChunkReadStream(DecoratorStream)>>peek ChunkReadStream>>skipSeparators ChunkReadStream>>basicNextChunk ChunkReadStream>>next SourceFileArray>>readOnlyDo: BlockClosure>>ensure: SourceFileArray>>readOnlyDo: SourceFileArray>>changeRecordsFrom:className:isMeta:do: SourceFileArray>>changeRecordsFrom:className:isMeta: VersionBrowser>>buildChangeList VersionBrowser>>buildBrowser VersionBrowser>>browseVersionsOf: Everything looks reasonable. The underlying ZnBufferedReadStream is at position 2, and the first few bytes are 159 166 34 39 46 or, in hex: 9F A6 22 27 2E That first byte, 9F or 10011111, is not valid as the first byte in a UTF-8 sequence (itâs a valid continuing byte) â which presumably is why ZnUTF8Encoder is complaining. So, why is the VersionBrowser starting to look at that particular place in the source file? VersionBrowser >> buildChangeList looks like this: buildChangeList rgMethod sourcePointer ifNil:[ ^ #() ]. ^ (SourceFiles changeRecordsFrom: rgMethod sourcePointer className: rgMethod instanceSideParentName isMeta: rgMethod isMetaSide) collectWithIndex: [ :c :i | | rg | rg := c asRingDefinition. rg annotationNamed: #versionIndex put: i ] and rgMethod sourcePointer is the value of the sourcePointer attribute in the attributes dictionary in rgMehod. What can be done to fix this? Andrew

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GlorpSQLite on Pharo 7
by Pierce Ng Oct. 23, 2018

Oct. 23, 2018

Hi all, GlorpSQLite now runs on Pharo 7, passing all 891 tests. Load from my repo's pharo7dev branch: Metacello new baseline: 'GlorpSQLite'; repository: 'github://PierceNg/glorp-sqlite3:pharo7dev'; load. Tested on 32- and 64-bit Ubuntu 18.04 with image 5f13ae8. Pierce

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[ANN] Next Pharo Sprint: Oct 26
by Marcus Denker Oct. 22, 2018

Oct. 22, 2018

We will organize a Pharo sprint / Moose dojo Oct 26, starting at 10:00am. (Local Time Paris). Goals of this sprint: â¢ Pharo 7 issues Remote Sprint: Remotely, you can join us on Discord. During the sprint, we synchronize local and remote Pharo sprinters: http://pharo.org/contribute-events Known Local Sprint meetings Lille/France: It will be at the Inria Lille, Building B, third floor (RMoD offices). As the building is not open to the public, please contact us before if you plan to come https://association.pharo.org/event-2973622

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Pharo2VW (Was:[vwnc] Parsing in Smalltalk)
by Steffen MÃ¤rcker Oct. 21, 2018

Oct. 21, 2018

Hi, I tried the tool yesterday and found some hickups. After opening issues on GitHub, I wonder how I can easily contribute a PR there. I imagine there is a straight-forward way with Iceberg now, isn't it? I a sorry if I miss the obvious but I am still not familiar with Pharos comprehensive tool set. Best, Steffen Am .10.2018, 18:06 Uhr, schrieb milton mamani <akevalion(a)gmail.com>: > Hi you can use > > https://github.com/ObjectProfile/Pharo2VW > > Cheers, Milton > > El sÃ¡b., 13 oct. 2018 a las 12:38, Steffen MÃ¤rcker (<merkste(a)web.de>) > escribiÃ³: > >> 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 >> preferred way to do the latter? >> >> Jan mentioned that there might be an automated tool to port stuff to >> VisualWorks. Do you have a name? And again the old question: what is the >> preferred workflow to exchange code between the two dialects? Till now I >> stick to FileOut30. >> >> input Prism Storm Xtreams.PEG PP PP2 >> size parse check check parse cache parse parse optim >> 230kB 0.1s 10s 6s 9s 3s 2s 4s 0.2s >> 544kB 0.2s 90s 20s 20s 7s 5s 9s 0.5s >> 1.1MB 0.4s 392s 46s 34s 13s 8s 15s 1.0s >> 1.4MB 0.8s 1091s 85s 47s 20s 12s 20s 1.3s >> 2.2MB 63s 30s 16s 27s 1.9s >> 2.9MB 81s 44s 20s 34s 2.5s >> 3.8MB 107s 61s 25s 45s 3.1s >> 4.4MB 123s 76s 30s 56s 3.7s >> >> Best, Steffen >> >> >> Am .10.2018, 05:22 Uhr, schrieb Tudor Girba <tudor(a)tudorgirba.com>: >> >> > 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 trying this out? >> > >> > Cheers, >> > Doru >> > >> > >> > >> >> On Oct 4, 2018, at 10:46 PM, Steffen MÃ¤rcker <MerkSte(a)web.de> 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 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 >> >> all again with PetitParser, I wrote a PetitParserGenerator that takes >> >> the DSL and builds a PetitParser. >> >> >> >> The numbers below are just parsing times, no further actions >> involved. >> >> For reference I show the times from PRISM (which uses JavaCC), too -- >> >> although they involve additional verification and normalization steps >> >> on the AST. >> >> >> >> input Prism XP PP >> >> 230kB 14s 9s 2s >> >> 544kB 121s 20s 5s >> >> 1.1MB 421s 34s 8s >> >> 1.4MB 1091s 47s 12s >> >> 2.2MB 63s 16s >> >> 2.9MB 81s 20s >> >> 3.8MB 107s 25s >> >> 4.4MB 123s 30s >> >> >> >> Please note that these times are not representative at all. It's just >> a >> >> single example and I put zero effort in optimization. However, I am >> >> quite satisfied with the results. >> >> >> >> [*] I was already familiar with the DSL of Xtreams-Parsing, which I >> >> like very much. I did not consider SmaCC, as I find PEGs easier to >> use. >> >> >> >> Best, Steffen >> >> >> >> >> >> >> >> Am .10.2018, 20:14 Uhr, schrieb Steffen MÃ¤rcker <merkste(a)web.de>: >> >> >> >>> 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 effort? >> >>> >> >>> Sorry for cross-posting, I thought this might interest both >> >>> communities. >> >>> >> >>> Cheers, Steffen >> > >> > -- >> > www.feenk.com >> > >> > "No matter how many recipes we know, we still value a chef." >> > >> > >> > >> > >> > >> > >> >

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library to chain select:/collect:/ ... via cascade
by Peter Uhnak Oct. 19, 2018

Oct. 19, 2018

Hi, is there some library that will allow me to chain select:/collect:/... via cascade? E.g. #(12 7 'a' nil #(0)) query reject: #isNil; select: #isNumber; collect: #squared; select: #even? The point is to not have to write billion parentheses when building a more complex query. I imagine this would be pretty easy to write, but figured I ask first. Thanks, Peter

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Installing SmaCC
by Dimitris Chloupis Oct. 19, 2018

Oct. 19, 2018

Hey guys I downloaded the latest Pharo 6.1 64bit for Windows and tried to install SmaCC through the catalog browser but it failed I did manage to install it following the instruction in the github repo but I see that I am missing most parser packages. The languages I am interested are Smalltalk (which is included) and C (if possible C++ too) cause I will be creating a new language which will be a cross between C and Smalltalk (very similar to smalltalk syntax but with the addtion of C types and no GC and dynamic typing and also a partial implementation of OOP that is quite diffirent). My goal is compilation of my language to readable C code so the ability to parse also existing C code is needed. Any help is greatly appreciated , thanks :)

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compiling libraries for Pharo on macOS
by Michel Onoff Oct. 18, 2018

Oct. 18, 2018

Hello, I've made some attempts to use the Pharo FFI. I've gone through the documentation [1] and tried some examples. While the documentation is quite clear about using external libraries from Pharo, it lacks details on how to build own libraries to be used from Pharo. Specifically, I'm trying to build on all supported platforms, namely macOS, Windows and Linux. Currently I've got Linux and Windows under control, but I cannot find a systematic way to build on macOS. Here's an example for a library that I can use from a small test program but not from Pharo. Unfortunately, the diagnostic on Pharo is not detailed: it simply reports that it cannot load the module. clang -I <include-path> -O3 -c <source-path> ... clang -dynamiclib <object-files> -o lib<name>.dylib -undefined dynamic_lookup cp lib<name>.dylib <pharo-folder> Is there good documentation about how to correctly build libraries so that they can be used from Pharo? Alternatively, are there details on how Pharo FFI searches for libraries and links them in the Pharo process? Regards MO ---- [1] https://files.pharo.org/books-pdfs/booklet-uFFI/UFFIDRAFT.pdf

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GlorpSQLite Github release management
by Pierce Ng Oct. 18, 2018

Oct. 18, 2018

Hi all, So GlorpSQLite works on Pharo 5 and 6, but not yet on Pharo 7. Currently, I have the following: https://github.com/PierceNg/glorp https://github.com/PierceNg/glorp-sqlite3 Which are forks of these: https://github.com/pharo-rdbms/glorp https://github.com/pharo-rdbms/glorp-sqlite3 I'm thinking to create a release, say, v1.0, for the current known working GlorpSQLite combo for Pharo 5 and 6 in my repos, then, ... create a branch for Pharo 7? Then turn the branch into release v2.0 when ready? I do all of these actions in my repo, and through pull requests to upstream, Git will take care of synchronizing across the forks? Does the above sound workable? Is there a better approach? Pierce, Git noob

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RBParser bug ? (Morphic corruption)
by Dimitris Chloupis Oct. 17, 2018

Oct. 17, 2018

If I do something normal in the Playground like RBParser parseExpression: 'bac' and inspect it , it works fine If I do something like RBParser parseExpression: 'bac->'. Then it displays an error and things really get weird I get redraw problems with Morphic(if I start moving windows around), with windows leaving trailing images behind and Pharo slowing down. Can anyone reproduce my problem ? I can reproduce this behavior in 6.1 32 bit and 64 bit and with other incorrect syntax strings.

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