Squeak-dev September 2007

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157 discussions

Public Relations Team question
by Chris Cunnington 14 Sep '07

14 Sep '07

Stephane Ducasse and his team have completed a new book on Squeak. It's open source as a pdf with the option of ordering a copy from Lulu. I think this is news, and that a press release should be created and added to the Media section of Squeak.org. And then we can submit this as a news story to Slashdot. Does anybody have an objection to this? Chris Cunnington PR Team Leader

10 15

Exception handling
by C. David Shaffer 14 Sep '07

14 Sep '07

"Here are some musings on exception handling and a method I'm playing with. I'd appreciate the eyes of someone more versed in this. ensure block runs after handler block has returned (but this is not a resumable error)" [ [1/0] ensure: [Transcript show: 'ensure'; cr] ] on: Error do: [:ex | Transcript show: 'handler'; cr] "produces: handler ensure" "...makes sense for Notifications since we might 'ex resume: someValue'" [ [Notification signal: 'yes'] ensure: [Transcript show: 'ensure'; cr]. ] on: Notification do: [:ex | Transcript show: 'handler'; cr] "what if we retry the block? works as expected...ensure block runs before block retried." retried := false. [ [1/0] ensure: [Transcript show: 'ensure'; cr] ] on: Error do: [:ex | Transcript show: 'handler'; cr. retried ifFalse: [retried := true. ex retry]] "produces handler ensure handler ensure" "OK...consistency is nice but what if our handler really doesn't plan or can't resume an exception. I propose:" [ [1/0] ensure: [Transcript show: 'ensure'; cr] ] on: Error unwindAndDo: [:ex | Transcript show: 'handler'; cr. retried ifFalse: [retried := true. ex retry]] "which produces ensure handler The on:unwindAndDo: semantics are important if the handler needs to access a resource protected by a mutex and used in the protected block. So:" mutex := Semaphore forMutualExclusion. [ mutex critical: [Error signal: 'I am bad'] ] on: Error unwindAndDo: [mutex critical: [Transcript show: 'handler'; cr]] " produces handler rather than deadlocking as it would with on:do: Here is a hackish implementation: BlockContext>>on: exception unwindAndDo: handler ^self on: exception do: [:ex | (ex instVarNamed: #signalContext) unwindTo: (ex instVarNamed: #handlerContext). handler value] I'm driving without a map here...does anyone else find this to be a useful exception handling pattern? Has this been hashed over before? Is the above code horribly evil (besides the obvious intrusion of instVarNamed:)? " David

2 2

Getting double semi as sequencer harvested.
by Jerome Peace 14 Sep '07

14 Sep '07

Hi Vassili I started the following report on mantis and uploaded the second of your code offerings. See: http://bugs.squeak.org/view.php?id=6649 0006649: [RFE] [Code] Request ";;" (double semi) be added to language as a "then" sequencer. To complete the report to the havestable stage following things IMO need to happen. The code has to be slimmed down to just the double-semi. The token may want to be renamed way from pipe to something closer to the "and then..." or "and next..." meaning. There should be at least some simple tests written to prove double semi works as intended. It would be great if you looked in on the report and wonderful if you followed thru with your initial effort and helped get this ready for harvesting. I started to send you a "reminder" directly from the report but I wasn't absolutely sure that "vassili" and you were one and the same. Cheers. Yours in curiosity and service, --Jerome Peace ____________________________________________________________________________________ Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545469

34 152

Syntax error when attempting to load FFI-md.12.mcz into Squeak3.9-final-7067 image
by tim Rowledge 14 Sep '07

14 Sep '07

I'm attempting to do some updating of VMMaker. It seemed obvious to start from the nominally stable current image, which would appear to be Squeak3.9-final-7067. This does not include the FFI package (though the class categories are in the brower) so I looked in the list of repositories mentioned in the MC Browser and found source.squeakfoundation.org/39a -> FFI-md.12.mcz. On attempting to load it, I get a syntax error within FFITester class>ffiPrintString: because the compiler does not like the cdecl pragma. I'm guessing (purely guessing at this stage) that this might be because the relvent compiler changes have not been installed at this point. At which point did I go wrong? Choice of image? Repository? Package? Side of bed to get out of? tim -- tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim Variables won't; constants aren't.

3 3

Re: Fear and loathing of the "perification" of Smalltalk
by Peter William Lount 13 Sep '07

13 Sep '07

Paolo Bonzini wrote: > Jason Johnson wrote: >> On 9/13/07, Paolo Bonzini <paolo.bonzini(a)lu.unisi.ch> wrote: >>> Evolution does not mean perlification; on the contrary, if Randal >>> Schwartz is in this mailing >>> list we might have something to learn from him and Perl. >>> >>> Paolo >> >> Perl isn't really relevant anymore. The only thing it has every >> really had to teach is what not to do. > > Ruby is as much Perl as it is Smalltalk. > > Paolo > Hi, I most certainly am open to learning from Randal Schwartz or Larry Wall (the inventor of Perl) anytime that they are willing to teach or simply converse. While I don't like twisted syntax it obviously works for the Perl people (and many others). I'm certainly open to learning even from you Paolo. ;--) I only picked on Perl for coining the pejorative "perlification" since it's pretty bad and I know it a bit better than other languages, and I've already written some articles about it. Oops a quick google search finds that I didn't coin the phrase, as others beat me to it, so there must be something to it after all out in the wider culture. It's good to know that it's not just Smalltalkers who are averse to Perl. At least APL went out full hog and introduced it's own symbols, some if not all drawn from Math. That's also what Mathematical has done. Oh well, they can have their cryptic zoos all they want. Smalltalk's big idea is messaging based upon unary, binary and keyword syntax. It's best to maximize the potential out of that paradigm before adding crufty goo. That is, in my humble view as someone who's used Smalltalk professionally for 23+ years now. Cheers, Peter

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[ANN][Squeak-dev Image] Version sq3.9-7067dev07.09.1
by Damien Cassou 13 Sep '07

13 Sep '07

Squeak-dev image is an image made for squeak developers. More information is available at: http://damien.cassou.free.fr/squeak-dev.html Changes in this version: --------------------------- - DynamicProtocols has been updated with bug fixes and less annoying progress bars. They should also be faster now because I deactivated the Required protocol per default. - eCompletion fixed a bug. - OminBrowser has been updated to contain a lot of bug fixes. - SUnit and SUnitGUI are now the ones of Keith Hodges. - The Universe now points to each SqueakMap entry. Contained packages: ------------------------ This image contains the following packages: AST version 150 AutomaticMethodCategorizer version 0.24 AutomaticMethodCategorizerServices version 0.2 ClassSelectorSets version 1 DynamicProtocols version 0.67 eCompletion version 0.88 eCompletion-Traits version 0.1 eCompletionOmniBrowser version 0.4 Installer version 1.0.130 OmniBrowser version 0.388 OmniBrowser-Full version 0.25 OmniBrowser-Morphic version 0.34 OmniBrowser-Refactory version 0.33 OmniBrowser-Standard version 0.303 OmniBrowser-SUnitIntegration version 0.5 OmniBrowser-TraitsIntegration version 0.28.1 Refactoring Engine version 37 RoelTyper version 0.60 ScriptManager version 0.6 Shout version 3.15-tween.70 ShoutWorkspace version 1-tween.1 SmaCC runtime version 13 Squeak dev packages version 0.14 SUnit version 0.33 SUnit-improved version 4.0 SUnitGUI-improved version 4.0 Universes version 36 Universes OmniBrowser version 0.32 YAXO version 9 Updating the image: ------------------------- You are not obliged to download a new image if you don't want. You can always update your image. To upgrade your already existing squeak-dev image: 1) World menu->open...->Package Universe Browser 2) Update list from network 3) Select all upgrades 4) Install selection 5) Execute: 'DEVImageCreator default install' (all windows will be closed) Prepared packages: -------------------------- There are a lot of packages prepared for you in this image. They are not loaded in the image, but they can be easily. - Open Package Universe Browser (world->open...->Package Universe Browser). - Click on "Update list from network" - Wait a few seconds - Select your packages - Install them -- Damien Cassou

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Float>>nan
by Mathieu Suen 13 Sep '07

13 Sep '07

Hi, I have a strange bug: Float nan = Float nan -> false It seem that the primitive for Float>>= is broken. Mth

10 15

SmaCC generating empty class categories
by Simon Guest 12 Sep '07

12 Sep '07

I've just started playing with SmaCC, and while I'm quite impressed overall, I did hit this annoyance. The auto-generated classes have a class category of '', i.e. empty string. I suspect this isn't really allowed. It certainly stops the Whisker browser from working. (But is that a bug in Whisker or SmaCC?) When I moved the generated classes to my own category, it left an empty category behind, still called '', and still breaking Whisker. To fix this, I clicked reorganize in the category list in a browser, and then deleted the single line ('') in the lower pane which corresponded to this duff category. (Is this what reorganize is for?) I'm left wondering what to report as broken, and where. (Are all components of Squeak tracked on Mantis?) cheers, Simon

2 1

Re: [Q] Someone have the Tamaris pdf file ?
by Alain Plantec 12 Sep '07

12 Sep '07

El 9/6/07 6:44 PM, "Alain Plantec" <Alain.Plantec(a)univ-brest.fr> escribió: >> hi Edgar, >> here it is. >> I will make it available for everybody in tamaris web site. >> alain > >Alain >Very, very thanks. >By the way, the last I found is Tamaris-3c.sar and run well on 3.10. >I think is some old .sar the .pdf is inside , is correct ? >Remember to put Tamaris into Universes, as now is the default and not >SqueakMap. > >Continue the super job ! >Edgar Hi again Edgar and thanks for your support. The last package is 3d.sar. It has the pdf doc inside. it is available from squeak map. From Universes, it is also available, choose Development category and then Tamaris. Tamaris.pdf is only distributed from the .sar archive. alain

1 0

Simulation Package Eveline
by Frank Urbach 12 Sep '07

12 Sep '07

Hi list, does anybody knows where the simulation package from Matej Kosik eveline is gone. I didn't found this on squeakmap or on squeaksource and the page from matej kosik isn't available any longer. regards, Frank

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