- Pharo-users - lists.pharo.org

Re: [Pharo-users] SmaCC: First steps

by kilon alios

"Ok. I made sure the help was up to date with the current SmaCC; the online tutorial may differ a bit (GUI, some of the class creation commands)." Yes I am not complaining about your effort. I am just new with parsing and everything looks alien to me :D I am mostly following your documentation inside pharo but I dont mind reading anything available. "Scanners divide the input stream in tokens with regular expressions." ok so regular expressions are used, good I am familiar with them because already used them to parse pharo messages to python method calls. At least I know something useful :) "If you give new classes, it will create them. If you give existing classes, it will reuse them." Ok so creating classes for parser an scanner is only optional. That mean that those classes can do some extra work that is not defined with the SmaCC syntax. "This is the issue I told you about in Pharo 4. The fix is waiting for review before integration (https://pharo.fogbugz.com/default.asp?14730)" Ah yes now I remember, I could review it I am a member of pharo fogbuz but I am clueless of how it works and what it affects so maybe I am not a good reviewer in this case. "With the PythonParser, you get a visitor generated, so you can subclass it and visit the ast produced by the parser and generate the relevant OrderedCollections." Roger so that means I will have to take a deep look into PythonParser class and try to figure things out. "It means or." I assumed so , but I wanted to make sure. "I don't have any at hand: I teach that at the moment, so I'm not delegating to a tutorial for my students ;)" I was not aware that you are a teacher and that you teach SmaCC , cool. So I think I will try to put more effort to reading the tutorial and experimenting with Pharo 3 till Pharo 4 is fixed. "The way it is set should support you well for doing what you want, so keep doing it :)" Great if you say I can do this , this is already great news for me. The effort is not a problem , no pain no gain. I will be back with more questions.

Jan. 28, 2015

Re: [Pharo-users] SmaCC: First steps

by kilon alios

Yes I am aware of PettitParser but the one thing that made me very interested into SmaCC is that it already supports Python syntax parsing , though I think is for Python 2 but if its 2.7 it wont be much issue for me that use Python 3.4 syntax. >From a first look it looks PettitParser easier to use but Thiery told me SmaCC is also fairly easy and personally I dont care so much I only want something that gets the job done as fast as possible. Having an existing python parser certainly makes things faster for me. But yes I have played around with pettitparser and I really liked it. On Wed, Jan 28, 2015 at 4:22 PM, Johan Fabry <jfabry(a)dcc.uchile.cl> wrote: > Hi Kilon, > > I think itâs better that you take a look at PetitParser (e.g. > http://www.themoosebook.org/book/internals/petit-parser ) I have found > PetitParser more user friendly than SmaCC. > > > On Jan 28, 2015, at 14:53, kilon alios <kilon.alios(a)gmail.com> wrote: > > Ok I have read a few times of the tutorial of Smacc in here > http://www.refactoryworkers.com/SmaCC/ASTs.html > > and I am also following the help tool documentation inside pharo for SmaCC > and I have to say I am very confused. Please bare with me because I am > extremely noob when it comes to parsing, this is my first effort. > > Now the way I understand it so far, is that SmaCC uses a syntax similar to > regex expressions to define parsers and scanners. Scanners evaluate a > string to see that it contains a valid form and parser divide to parts > named as "tokens" and help in the creating of ASTs which are basically > hierarchy tree containing the syntax elements of a language. > > Now in order to make SmaCC work I need to use the SmaCC tool that comes > with pharo . The smacc tool takes two inputs a scanner and a parser class. > Does that mean I need to create that parser and scanner class ? I thought > since I define the syntax that those things would be generated by the tool. > > What I need to define exactly ? > > Why when I select the PythonScanner2 and PythonParser2 and click then > Compile LR it gives a MNU receiver of method is nil ? > > I am using latest Pharo 4 image. > > My goal is to parse python types to similar pharo objects. I get those > python types as strings and my main focus in lists, dictionaries and tuples > . The tricky part is that one can contain the other inside in every > imagined way. > > The way I understand it I will need something called "transformations" to > convert those python types to OrderedCollections, Arrays etc and anything > would make more sense for a pharo coder. > > Additionally what is the meaning of the vertibal bar ? --> | > eg. > | Number > > Are there any other tutorials that can help a beginner like me to > understand these concepts ? > > I am not looking for someone to give me the solution to the plate, I would > love to learn and understand parsing because I am very interested into > making Pharo easy to mix with Python code and allow Pharo to use Python > libraries without the user having to learn or code Python :) > > As you may imagine this is a crucial ingredient for my project Ephestos > which tries to use Pharo to script Blender by either replacing or > cooperating with blender python. So learning a good way to parse pharo code > to python code and vice versa is extremely important for me. > > > > > ---> Save our in-boxes! http://emailcharter.org <--- > > Johan Fabry - http://pleiad.cl/~jfabry > PLEIAD lab - Computer Science Department (DCC) - University of Chile > >

Jan. 28, 2015

Re: [Pharo-users] SmaCC: First steps

by Thierry Goubier

2015-01-28 14:53 GMT+01:00 kilon alios <kilon.alios(a)gmail.com>: > Ok I have read a few times of the tutorial of Smacc in here > http://www.refactoryworkers.com/SmaCC/ASTs.html > > and I am also following the help tool documentation inside pharo for SmaCC > and I have to say I am very confused. Please bare with me because I am > extremely noob when it comes to parsing, this is my first effort. > Ok. I made sure the help was up to date with the current SmaCC; the online tutorial may differ a bit (GUI, some of the class creation commands). > > Now the way I understand it so far, is that SmaCC uses a syntax similar to > regex expressions to define parsers and scanners. Scanners evaluate a > string to see that it contains a valid form and parser divide to parts > named as "tokens" and help in the creating of ASTs which are basically > hierarchy tree containing the syntax elements of a language. > Scanners divide the input stream in tokens with regular expressions. Parsers builds (sort of: at least they follow the steps) a tree (a parse tree) out of the tokens, parse tree which is reduced and simplified as an AST. And the AST represent the structure of the source code (as per the language definition in the grammar) > > Now in order to make SmaCC work I need to use the SmaCC tool that comes > with pharo . The smacc tool takes two inputs a scanner and a parser class. > Does that mean I need to create that parser and scanner class ? I thought > since I define the syntax that those things would be generated by the tool. > If you give new classes, it will create them. If you give existing classes, it will reuse them. > What I need to define exactly ? > > Why when I select the PythonScanner2 and PythonParser2 and click then > Compile LR it gives a MNU receiver of method is nil ? > This is the issue I told you about in Pharo 4. The fix is waiting for review before integration (https://pharo.fogbugz.com/default.asp?14730) > > I am using latest Pharo 4 image. > > My goal is to parse python types to similar pharo objects. I get those > python types as strings and my main focus in lists, dictionaries and tuples > . The tricky part is that one can contain the other inside in every > imagined way. > > The way I understand it I will need something called "transformations" to > convert those python types to OrderedCollections, Arrays etc and anything > would make more sense for a pharo coder. > With the PythonParser, you get a visitor generated, so you can subclass it and visit the ast produced by the parser and generate the relevant OrderedCollections. > > Additionally what is the meaning of the vertibal bar ? --> | > eg. > | Number > It means or. For example, Atom: | Number ; Would mean that Atom is either empty or a number. > > Are there any other tutorials that can help a beginner like me to > understand these concepts ? > I don't have any at hand: I teach that at the moment, so I'm not delegating to a tutorial for my students ;) > > I am not looking for someone to give me the solution to the plate, I would > love to learn and understand parsing because I am very interested into > making Pharo easy to mix with Python code and allow Pharo to use Python > libraries without the user having to learn or code Python :) > > As you may imagine this is a crucial ingredient for my project Ephestos > which tries to use Pharo to script Blender by either replacing or > cooperating with blender python. So learning a good way to parse pharo code > to python code and vice versa is extremely important for me. > The way it is set should support you well for doing what you want, so keep doing it :) Thierry

Jan. 28, 2015

Re: [Pharo-users] SmaCC: First steps

by Johan Fabry

Hi Kilon, I think itâs better that you take a look at PetitParser (e.g. http://www.themoosebook.org/book/internals/petit-parser <http://www.themoosebook.org/book/internals/petit-parser> ) I have found PetitParser more user friendly than SmaCC. > On Jan 28, 2015, at 14:53, kilon alios <kilon.alios(a)gmail.com> wrote: > > Ok I have read a few times of the tutorial of Smacc in here http://www.refactoryworkers.com/SmaCC/ASTs.html <http://www.refactoryworkers.com/SmaCC/ASTs.html> > > and I am also following the help tool documentation inside pharo for SmaCC and I have to say I am very confused. Please bare with me because I am extremely noob when it comes to parsing, this is my first effort. > > Now the way I understand it so far, is that SmaCC uses a syntax similar to regex expressions to define parsers and scanners. Scanners evaluate a string to see that it contains a valid form and parser divide to parts named as "tokens" and help in the creating of ASTs which are basically hierarchy tree containing the syntax elements of a language. > > Now in order to make SmaCC work I need to use the SmaCC tool that comes with pharo . The smacc tool takes two inputs a scanner and a parser class. Does that mean I need to create that parser and scanner class ? I thought since I define the syntax that those things would be generated by the tool. > > What I need to define exactly ? > > Why when I select the PythonScanner2 and PythonParser2 and click then Compile LR it gives a MNU receiver of method is nil ? > > I am using latest Pharo 4 image. > > My goal is to parse python types to similar pharo objects. I get those python types as strings and my main focus in lists, dictionaries and tuples . The tricky part is that one can contain the other inside in every imagined way. > > The way I understand it I will need something called "transformations" to convert those python types to OrderedCollections, Arrays etc and anything would make more sense for a pharo coder. > > Additionally what is the meaning of the vertibal bar ? --> | > eg. > | Number > > Are there any other tutorials that can help a beginner like me to understand these concepts ? > > I am not looking for someone to give me the solution to the plate, I would love to learn and understand parsing because I am very interested into making Pharo easy to mix with Python code and allow Pharo to use Python libraries without the user having to learn or code Python :) > > As you may imagine this is a crucial ingredient for my project Ephestos which tries to use Pharo to script Blender by either replacing or cooperating with blender python. So learning a good way to parse pharo code to python code and vice versa is extremely important for me. ---> Save our in-boxes! http://emailcharter.org <--- Johan Fabry - http://pleiad.cl/~jfabry PLEIAD lab - Computer Science Department (DCC) - University of Chile

Jan. 28, 2015

SmaCC: First steps

by kilon alios

Ok I have read a few times of the tutorial of Smacc in here http://www.refactoryworkers.com/SmaCC/ASTs.html and I am also following the help tool documentation inside pharo for SmaCC and I have to say I am very confused. Please bare with me because I am extremely noob when it comes to parsing, this is my first effort. Now the way I understand it so far, is that SmaCC uses a syntax similar to regex expressions to define parsers and scanners. Scanners evaluate a string to see that it contains a valid form and parser divide to parts named as "tokens" and help in the creating of ASTs which are basically hierarchy tree containing the syntax elements of a language. Now in order to make SmaCC work I need to use the SmaCC tool that comes with pharo . The smacc tool takes two inputs a scanner and a parser class. Does that mean I need to create that parser and scanner class ? I thought since I define the syntax that those things would be generated by the tool. What I need to define exactly ? Why when I select the PythonScanner2 and PythonParser2 and click then Compile LR it gives a MNU receiver of method is nil ? I am using latest Pharo 4 image. My goal is to parse python types to similar pharo objects. I get those python types as strings and my main focus in lists, dictionaries and tuples . The tricky part is that one can contain the other inside in every imagined way. The way I understand it I will need something called "transformations" to convert those python types to OrderedCollections, Arrays etc and anything would make more sense for a pharo coder. Additionally what is the meaning of the vertibal bar ? --> | eg. | Number Are there any other tutorials that can help a beginner like me to understand these concepts ? I am not looking for someone to give me the solution to the plate, I would love to learn and understand parsing because I am very interested into making Pharo easy to mix with Python code and allow Pharo to use Python libraries without the user having to learn or code Python :) As you may imagine this is a crucial ingredient for my project Ephestos which tries to use Pharo to script Blender by either replacing or cooperating with blender python. So learning a good way to parse pharo code to python code and vice versa is extremely important for me.

Jan. 28, 2015

Building 3D shapes in Roassal with interaction. Unexpected behaviour?

by Nicolas Lusa

Hello everyone, It has been a while since I started working with Woden and Roassal and I recently figured out that something is behaving unexpectedly (at least from my point of view). Assume we create 3 shapes (all the same kind) with Roassal (i.e. 3 RWPyramid) and we associate an eventListener to see when someone click on the object. In such case we change the color of the shape. Here is the code: v := RWView new. e := (RWPyramid new) element. e on: RWMouseButtonDown do: [ :ev | ev element shape color: WDColor blue. ev element changed. ]. v add: e. g := (RWPyramid new) element. g on: RWMouseButtonDown do: [ :ev | ev element shape color: WDColor green. ev element changed. ]. g translateBy:(WDVector3 newX: 4.0 y: 0.0 z: 0.0). v add: g . f := (RWPyramid new) element. f on: RWMouseButtonDown do: [ :ev | ev element shape color: WDColor red. ev element changed. ]. f translateBy:(WDVector3 newX: 2.0 y: 0.0 z: 0.0). v add: f. v addInteraction: RWMouseKeyControl. v camera position: (WDVector3 x: 0.0 y: 0.0 z: 3.0). v open. So far, so good. But now, let's try to change some objects type, (i.e. let's put a Pyramid a Cube and a Cylinder). Here is the code: v := RWView new. e := (RWPyramid new) element. e on: RWMouseButtonDown do: [ :ev | ev element shape color: WDColor blue. ev element changed. ]. v add: e. g := (RWCube new) element. g on: RWMouseButtonDown do: [ :ev | ev element shape color: WDColor green. ev element changed. ]. g translateBy:(WDVector3 newX: 4.0 y: 0.0 z: 0.0). v add: g . f := (RWCylinder new) element. f on: RWMouseButtonDown do: [ :ev | ev element shape color: WDColor red. ev element changed. ]. f translateBy:(WDVector3 newX: 2.0 y: 0.0 z: 0.0). v add: f. v addInteraction: RWMouseKeyControl. v camera position: (WDVector3 x: 0.0 y: 0.0 z: 3.0). v open. Now if you try this, and you'll try to click on the Pyramid, you will see that the cube is the one that gets to change color but not the Pyramid. Same if you click on the Cylinder. I think the code that I wrote is correct, but I might be wrong. Does anyone know what is the problem due? Cheers, Nicolas

Jan. 28, 2015

HTTP Token Based authentication server?

by Esteban A. Maringolo

Is it there any implementation for token based authentication over HTTP? I know there is a OAuth client, but do we have an OAuth server? I'm migrating the authentication of our mobile apps from standard HTTP digest (user/pass base64 encoded) to token based auth, and could find very useful to have something already done to use or to build on top of. Regards! Esteban A. Maringolo

Jan. 28, 2015

Re: [Pharo-users] Supporting Start up around Pharo

by Sebastian Sastre

<3 Awesome initiative! Looking forward to see what comes from this! > On Jan 28, 2015, at 8:51 AM, stepharo <stepharo(a)free.fr> wrote: > > Hi guys > > if you are considering to create a start up around Pharo, we could find one year financial support > if this is serious and that you would like to come to work around Lille or France. > > Stef >

Jan. 28, 2015

Supporting Start up around Pharo

by stepharo

Hi guys if you are considering to create a start up around Pharo, we could find one year financial support if this is serious and that you would like to come to work around Lille or France. Stef

Jan. 28, 2015

Re: [Pharo-users] Pharo Sound of Silence

by Ignacio Sniechowski

Sean, Could please indicate me how I have to do to play a mp3 inside Pharo? I loaded FMOD from your repo, but I don't know if I have to install something else, or where the mp3 file has to be or what class use. I'm running Pharo 3 and 4 under Win 8.1 Thanks in advance! best Nacho *Lic. Ignacio Sniechowski, MBA* *Prosavic SRL* *Tel: (011) 4542-6714* On Wed, Jan 28, 2015 at 6:12 AM, Xavier MESSNER <xmessner(a)gmail.com> wrote: > Sean P. DeNigris wrote > > > > Evan Donahue wrote > >> I'm trying to get sounds working in Pharo > > If it helps, I started a minimal wrapper of the cross-platform FMOD > > library at http://smalltalkhub.com/#!/~SeanDeNigris/FMOD . I did enough > to > > play mp3s. > > Really great ! i will try this on my linux box, thanks ! > > Xavier. > > > > -- > View this message in context: > http://forum.world.st/Pharo-Sound-of-Silence-tp4801562p4802113.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

Jan. 28, 2015