Squeak-dev June 2004

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[FIX] NewParagraph-moveBy
by Lic. Edgar J. De Cleene 28 Jul '04

28 Jul '04

So, seems my lucky day and I solved my own problems. Send in case is useful to others. Edgar

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[FIX]Unused Temps sometimes not removed
by Andrew Tween 28 Jul '04

28 Jul '04

Unused temps are not removed when saving a method if they are immediately preceded, or followed, by the | character. This changeset modifies Parser>>removeUnusedTemps so that rather than checking that each temp name found in the temp list is surrounded by separators, it checks that the temp is surrounded by non-alphaNumerics. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.693 / Virus Database: 454 - Release Date: 01/06/2004

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a little sugestion about squeak aesthetics
by Cancerbero 19 Jul '04

19 Jul '04

Hello. I'm new on this list and I don't know if i have right to make this suggestion about squeak, particularly squeak aesthetics. In my unix version the window (at a window manager level[1]) of squeak has the title "Squak3.7b-5868-truco.image" (I don't know if this happen in other OSs, too). For me, something like "Squeak 3.7beta 5868" or better: "The Squeak Objects Environment" would be better. ¿Can squeak control such things? Thanks [1] -- i'm using WindowMaker. -- Sebastián Gurin (Cancerbero) cancerbero_sgxARROBAusers.sourceforge.net http://www.geocities.com/cancerbero_sgx Nuestro amo juega al esclavo de esta tierra que es una herida que se abre todos los días a pura muerte, a todo gramo. - Violencia es mentir.

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[bug] stack overflow crashes Squeak.
by Michael van der Gulik 06 Jul '04

06 Jul '04

Hi all. If you make a naive class that calls itself: Forkbomb>>forkbomb ^ self forkbomb. Squeak 3.5 on Debian linux will eventually crash, leaving a huge stack dump in the terminal. Okay; it's really my fault for making such a stupid class, but I'm playing around with proxied objects, message sends etc and it's happening quite often while I'm debugging. Is there a way to limit the invocation stack to a sane level of deepness, after which a process/thread (whichever is Squeak terminology) gets suspended and an error thrown? Same probably applies to number of processes made by a thread. mikevdg.

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I want to run the interperter within squeak 3.6 or 3.7
by stéphane ducasse 03 Jul '04

03 Jul '04

Hi for the presentation I will do at RMLL I want to show that you can execute the VM inside itself. Nathanael told me that this was not working in 3.7. So I'm working with 3.6. I loaded VMMaker 3.7b5 I prepared a 3.6 image in MVC Then I executed (InterpreterSimulator new openOn: '/Volumes/Data/Users/ducasse/Workspace/FirstCircle/SqDemoes/Squeak3.6 -5424-basic/Squeak3.6-5424-basic-mvc.image') test But I get an error. I do not know where to find a version of VMMkaer for 3.6. I looked ont he site of tim but without success. Stef

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Squeak Source to VW
by Marco Paga 03 Jul '04

03 Jul '04

Hi. Does anybody know a good way to port my classes from squeak to visual works. I tried to simply file in .st files, and searched the web. I found a project ( http://cvstproj.sourceforge.net/ ) that seems to be dead. Regards Marco

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DateTime's and LargeIntegers
by Ross Boylan 02 Jul '04

02 Jul '04

I'm looking for ways to speed up my application, which has gotten intolerably slow. It spends a lot of its time doing operations on DateAndTime objects, which are basically Brent Pinkney's implementation of the ANSI standard for squeak. However, I see he has made some changes since the version I got. See http://minnow.cc.gatech.edu/squeak/1871 I notice that this class doesn't seem to have made it into the mainline image (3.6), though there is a TimeStamp class there. Aside from the fact that it has a different vocabulary, it doesn't have any associated concept of durations (e.g., a week), which I also need. There is at least one obvious functional difference: DateAndTime knows its offset from UTC, while TimeStamp doesn't. Not a must have feature for me. (However, I see some Mar 2004 messages with fixes, that sort of give the impression it is in the main update stream...?) My first question is if anyone could fill me in on the history of Date/Times and Durations in the image. I recall a couple of years ago there was some discussion of this, but I don't know how it turned out. In particular, there are issues of functionality, ANSI compatibility, and, as I've just discovered, speed. (DateAndTime generally converts stuff to a large integer and then operates; TimeStamp does not, at least in the < operator, which is eating a lot of my time). I also recall there was another change set being bandied about that introduced ANSI compatibility into the image. That had a different Date/Time implementation. Details at http://minnow.cc.gatech.edu/squeak/2384 Second, I see some discussion of LargeInteger plugins. That might make my operations go much faster. Are those builtin by default? I don't see anything in /usr/lib/squeak, even for the 3.6 Debianized vm that I got, I think, from Ned Konz. Would such a plugin help? How do I get or build it? How do I know if I'm already using it? To give you a sense of why I care, here are some timings in the profiler as I add a single task to my tasklist: The first column is time in seconds (not ms) 43 LargeNegativeInteger>>quo: 21 SmallInteger>>* 18 LargePositiveInteger>>asFloat 14 LargePositiveInteger>>+ That's a total of 68% of total execution time right there. Overall, the operations spends 64% of its time in the main morphic loop, within which 19% operations on DateAndTime or Durations 36% evaluating a sort block, within which 35% (i.e., almost all) operations on DateAndTime Obviously, waiting over a minute to add a task is far from user friendly! (Athlon 800Mhz). There is also the possibility of making it do fewer of these operations to begin with, but if there's a quick way to get a speed up that would be great.

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Magma counseling
by Ramiro Diaz Trepat 02 Jul '04

02 Jul '04

Does anybody have a more detailed guide or code examples on using Magma than what is on the main Squeak Swiki? I am running into problems, at a very eary stage, and I am almost sure that these problems are caused because of my meager knowledge on how to use the framework. For example, all the collections held as attributes by classes that you intend to persist should be MagmaCollections? How does the fact of using Magma affect the code and development process? What are the most important things to keep in mind? -- Ramiro Díaz Trepat http://neosmt.com

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strange monticello message when installing SmallWiki
by Martin Kuball 01 Jul '04

01 Jul '04

Hi! Installed SmallWiki from SM into a fresh 5967 image. Somewhere in between I got the following message: Warning: prerequisite specified version 1.2 of Named process but version 1.2 is currently registered on SqueakMap. Incompatibilities might exist and cause problems. If we need 1.2 and 1.2 is available (?) what is the problem? I got a similar message for another package and one error (method not understood). I had to restart the install two times. But I think SmallWiki is working now. Martin

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Monticello bug; #class and #== optimalizations
by Pavel Křivánek 01 Jul '04

01 Jul '04

Hi all, Monticello has a problem with this class construction: ProtoObject subclass: #MyClass instanceVariableNames: 'object' classVariableNames: '' poolDictionaries: '' category: 'MyClasses. MyClass superclass: nil It forgets the last line with superclass specification. I'm using it for proxy objects. Instances of MyClass have one variable to store a real receiver of messages. MyClass resends messages using doesNotUnderstand mechanism. doesNotUnderstand: aMessage ^ aMessage sendTo: object. It works well but there is one problem - Squeak uses optimalization of some message calls. For example, message #class is never called, because Squeak uses special bytecode 199 (bytecodePrimClass). Real class of proxy object is returned instead of receiver class. Message #isVariable returns wrong value for arrays, large integers etc. So I have made a variable subclass of MyClass and I use it for proxy object of variable receivers. It works well too. I used this proxy objects for a dictionary and its instance variables including tally. This variable stores a size of dictionary. When Squeak makes a copy of dictionary array, he sends tally like a parameter in constructor of new array, but primitive method fails. VM wants an integer instance strictly. Any ideas? Pavel

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