May 2017 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Morphic or forking bug?

by horrido

Thanks, Hilaire. I had high hopes for your suggestion. But after testing a few times, Pharo crashed again. So the step protocol doesn't solve the problem, either. HilaireFernandes wrote > Alternatively use the step protocol of the Morph class. I think it is > documented in the Pharo by example book. > > Hilaire > > > Le 31/05/2017 Ã 17:00, Denis Kudriashov a Ã©crit : >> Hi Horrido. >> >> Morphic is not thread safe library. Users should not update morphs >> state directly from background processes. Use #defer: message to >> update morphs in such cases. >> Try following loop: >> >> [ [ true ] whileTrue: [ UIManager default defer: [ a contents: 0 >> asString]. delay wait ] fork >> >> > > -- > Dr. Geo > http://drgeo.eu -- View this message in context: http://forum.world.st/Morphic-or-forking-bug-tp4948727p4948774.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

May 31, 2017

Re: [Pharo-users] ANTLR4 to SmaCC

by Henrique Rocha

Thierry Goubier wrote > LL(*) brings itself to entirely different hacks to play with the tokens > and lexical analysis that LR() grammars, and most of the hard work on > parsers is in that area. > > I haven't looked if the reversed recursion in ANTLR is hard to convert. I agree. But I have seem some tricks and tips to convert one kind to the other. It seems like a lot of the work can be automated. Thierry Goubier wrote > Write a ANTLRv4 grammar syntax grammar in SmaCC would do the trick. Unfortunately, I dont have the skills or the knowledge in SmaCC to write this in SmaCC. I tried and failed (so many times) to convert a specific language to SmaCC and I got nowhere (I cant even imagine to do a more generic syntax grammar such as ANTLR). That is why I am asking for help if anyone else has done something like that. Thanks and best regards, - Henrique -- View this message in context: http://forum.world.st/ANTLR4-to-SmaCC-tp4948738p4948771.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

May 31, 2017

Re: [Pharo-users] Morphic or forking bug?

by Hilaire

Alternatively use the step protocol of the Morph class. I think it is documented in the Pharo by example book. Hilaire Le 31/05/2017 Ã 17:00, Denis Kudriashov a Ã©crit : > Hi Horrido. > > Morphic is not thread safe library. Users should not update morphs > state directly from background processes. Use #defer: message to > update morphs in such cases. > Try following loop: > > [ [ true ] whileTrue: [ UIManager default defer: [ a contents: 0 > asString]. delay wait ] fork > > -- Dr. Geo http://drgeo.eu

May 31, 2017

Re: [Pharo-users] ANTLR4 to SmaCC

by Thierry Goubier

Hi Henrique, Le 31/05/2017 Ã 17:03, Henrique Rocha a Ã©crit : > Hello, > > I was trying to convert a ANTLR4 grammar specification to SmaCC. After many > unsuccessful tries that made me question my sanity I wondered: maybe someone > has a solution. Grammar conversion is something that can be automated. Sort of. LL(*) brings itself to entirely different hacks to play with the tokens and lexical analysis that LR() grammars, and most of the hard work on parsers is in that area. I haven't looked if the reversed recursion in ANTLR is hard to convert. The use of the + * ? [ ] symbols is nice because it hides effectively on which side the recursion happens (left recursion in LR, right recursion in ANTLR) > My question is if anyone has done something to convert an ANTLR4 grammar to > a SmaCC grammar? Write a ANTLRv4 grammar syntax grammar in SmaCC would do the trick. Apart from semantic actions of course. Regards, Thierry > Thanks and farewell, > > - Henrique > > > > -- > View this message in context: http://forum.world.st/ANTLR4-to-SmaCC-tp4948738.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

May 31, 2017

Re: [Pharo-users] anotations like <todo> etc.

by Esteban Lorenzano

> On 31 May 2017, at 19:19, Petr Fischer <petr.fischer(a)me.com> wrote: > > Hello, in Pharo 6.0, there is new annotations/pragmas like "<todo>â. thatâs Pavelâs intromission :) in fact it should be self flag: #todo. the pragma is less intromission with code, but it has to be put in a specific place. Esteban > > Is there any doc about this? How can I browse all "todos", how can I browse all possible annotations etc.? > > Thanks! pf >

May 31, 2017

Re: [Pharo-users] anotations like <todo> etc.

by Sven Van Caekenberghe

Open Spotter, type 'todo', scroll to the bottom, under Pragmas, click, a GT inspector opens on all usages Or type 'todo #p' .. > On 31 May 2017, at 19:19, Petr Fischer <petr.fischer(a)me.com> wrote: > > Hello, in Pharo 6.0, there is new annotations/pragmas like "<todo>". > > Is there any doc about this? How can I browse all "todos", how can I browse all possible annotations etc.? > > Thanks! pf >

May 31, 2017

Re: [Pharo-users] Morphic or forking bug?

by horrido

I tried *UIManager default defer:* but I still got an intermittent crash. Good suggestion, though. Maybe it's not related to Morphic not being thread-safe? Denis Kudriashov wrote > Hi Horrido. > > Morphic is not thread safe library. Users should not update morphs state > directly from background processes. Use #defer: message to update morphs > in > such cases. > Try following loop: > > [ [ true ] whileTrue: [ UIManager default defer: [ a contents: 0 > asString]. delay wait ] fork > > > > 2017-05-31 16:23 GMT+02:00 horrido < > horrido.hobbies@ > >: > >> I have a puzzling bug. I've narrowed the scenario down to this code: >> >> CrankyÂ»initA >> a := ((StringMorph contents: '####') color: Color white) position: >> (0@0 >> ). >> m addMorph: a >> >> CrankyÂ»initialize >> f := Form fromFileNamed: 'hot_air_balloon_mysticmorning.jpg'. >> m := ImageMorph new. >> m form: f. >> self initA. >> m openInWindowLabeled: 'Cranky'. >> delay := (Delay forSeconds: 5). >> [ [ true ] whileTrue: [ a contents: 0 asString. delay wait ] fork >> >> I can run this application for hours and hours with no problem. However, >> if >> I run it for a while and then close the application and then save/exit >> the >> image, the next time I start the image, there is some likelihood it will >> crash dump. The probability is something like 5-10%. >> >> Interestingly, if I remove the statement... >> >> a contents: 0 asString. >> >> from the infinite loop, I've not been able to replicate the crash. Is >> there >> something wrong with the way I'm updating the contents of the >> StringMorph? >> >> >> >> -- >> View this message in context: http://forum.world.st/Morphic- >> or-forking-bug-tp4948727.html >> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >> >> -- View this message in context: http://forum.world.st/Morphic-or-forking-bug-tp4948727p4948753.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

May 31, 2017

anotations like <todo> etc.

by Petr Fischer

Hello, in Pharo 6.0, there is new annotations/pragmas like "<todo>". Is there any doc about this? How can I browse all "todos", how can I browse all possible annotations etc.? Thanks! pf

May 31, 2017

Re: [Pharo-users] Porting Transducers to Pharo

by Peter Uhnak

You can also give a try to use SIF (Smalltalk Interchange Format) https://github.com/peteruhnak/sif There is parcel file in VW subfolder, and docs here: https://github.com/peteruhnak/sif/blob/master/docs.md I've used it about year ago for some small code exchanges; but of course you will have some issues with regards to namespaces, but it is doable. If you decide to try it please let me know if it work/didn't work for you (so I can update the github page). Peter On Wed, May 31, 2017 at 04:32:53PM +0200, Steffen MÃ¤rcker wrote: > Thanks for the encouraging response! First question: Which is the > recommended (friction free) way to exchange code between VW and Pharo? > > Cheers! > Steffen > > Am .05.2017, 16:22 Uhr, schrieb Alexandre Bergel <alexandre.bergel(a)me.com>: > > >I second Sven. This is very exciting! > > > >Let us know when you have something ready to be tested. > > > >Alexandre > > >

May 31, 2017

Re: [Pharo-users] Porting Transducers to Pharo

by Alexandre Bergel

If I remember correctly, there is a parcel in VisualWorks to export a file out (Squeak format). @Milton, can you give a hand to Steffen? Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On May 31, 2017, at 10:32 AM, Steffen MÃ¤rcker <merkste(a)web.de> wrote: > > Thanks for the encouraging response! First question: Which is the recommended (friction free) way to exchange code between VW and Pharo? > > Cheers! > Steffen > > Am .05.2017, 16:22 Uhr, schrieb Alexandre Bergel <alexandre.bergel(a)me.com>: > >> I second Sven. This is very exciting! >> >> Let us know when you have something ready to be tested. >> >> Alexandre > > >

May 31, 2017