Squeak-dev March 2004

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179 participants
629 discussions

[BUG][3.6] Resignalling an exception
by Avi Bryant 11 May '04

11 May '04

Try the following line of code in both 3.5 and 3.6: [1/0] on: Error do: [:e | e signal] In 3.5, when the debugger comes up, the top context is the send to #/. In 3.6, it is the handler block, with the send to #/ several frames down. Which is correct? I personally much prefer the 3.5 behavior. Another symptom of what I think is the same bug: [1/0. self inform: 'inner'] on: Error do: [:e | e defaultAction. self inform: 'outer']. Try this code. When the notifier pops up, click Proceed. In 3.5, you will see 'inner'. In 3.6, you will see 'outer'. Again, I would prefer the 3.5 behavior here. Does anyone know what exactly has changed, and how easy it is to fix?

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Re: [BUG][FIX]FileDirectory>directoryExists: a bit silly
by Bob Arning 29 Apr '04

29 Apr '04

On Sun, 3 Aug 2003 23:15:05 +0000 (GMT) tim(a)sumeru.stanford.edu wrote: >I'm fairly sure that >+++++++ >directoryExists: filenameOrPath > "Answer true if a directory of the given name exists. The given name >may be either a full path name or a local directory within this >directory." > "FileDirectory default directoryExists: FileDirectory default pathName" > > ^(FileDirectory default directoryNamed: filenameOrPath ) exists >++++++++++++++ >would actually be correct Umm... maybe you meant +++++++ directoryExists: filenameOrPath "Answer true if a directory of the given name exists. The given name may be either a full path name or a local directory within this directory." "FileDirectory default directoryExists: FileDirectory default pathName" ^(self directoryNamed: filenameOrPath ) exists ++++++++++++++ Cheers, Bob

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[ENH][VM][TEST] Adler32 crc primitive
by Andreas Raab 29 Apr '04

29 Apr '04

Looks like we need this ... at this point we're spending nearly half of the overall time for ZLibStream's compression/decompression in crc computations. The attached primitive should fix the problem and the tests should make sure it actually works :-)

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[BUG]FileDirectory & ServerDirectory cannot agree on assureExistenceOfPAth: or assurePathExists:
by Tim Rowledge 29 Apr '04

29 Apr '04

In 3.7-5607 - FileDirectory>assureExistence uses #assureExistenceOfPath: ServerDirectory>assureExistence uses #assurePathExists: The two methods are very nearly identical in fact and appear identical in intent. Perhaps the caretakers might like to agree on just one method? tim -- Tim Rowledge, tim(a)sumeru.stanford.edu, http://sumeru.stanford.edu/tim Strange OpCodes: CPM: Change Programmer's Mind

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[FIX][KCP][3.6a] IfUnhandledError-nk
by ned＠bike-nomad.com 29 Apr '04

29 Apr '04

from preamble: "Change Set: IfUnhandledError-nk Date: 27 June 2003 Author: Ned Konz This changeset: - edits all callers of BlockContext>>ifError: to use something else, usually #ifUnhandledError: - adds BlockContext>>ifUnhandledError: (see below) - marks BlockContext>>ifError: as deprecated - edits all callers of Semaphore>>critical:ifError: to use something else. - marks Semaphore>>critical:ifError: as deprecated - edits most callers of on: Error do: [ ... ] to use something else, mostly #ifUnhandledError: - restores the behavior of removing step messages from the WorldState step list when the step messages have an error (the 'start stepping again' debug menu choice will restart them) I wrote #ifUnhandledError:, which allows enclosing scopes to handle exceptions. This behaves exactly the same as #ifError:, except that: - if there is an outer exception handler, that handler gets to handle the exception instead, and - there is now a one-argument form as well as the 0 and 2 argument forms that gets passed the exception itself. "!

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[FIX] LinkHighlightClipFix-nk
by ned＠squeakland.org 27 Apr '04

27 Apr '04

"Change Set: LinkHighlightClipFix-nk Date: 8 March 2004 Author: Ned Konz Text links whose bounds extend past the visible bounds of their TextMorphs were not clipping their highlight boundaries when clicked. This CS fixes that problem. "

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MySql driver broken in 3.6g
by ar 23 Apr '04

23 Apr '04

the MySql driver 1.10 appears to be broken in 3.6g, due to the changes in Socket and SimpleClientSocket. (SimpleClientSocket was renamed to OldSimpleClientSocket and Socket was renamed to OldSocket). Simply changing the MySql driver to use the old classes is not sufficient because then SocketStream breaks. There may be more to it but that's as far as I got. Is this a known problem or has it been fixed already?

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Article about Squeak in German computer periodical ct'
by Lothar Schenk 23 Apr '04

23 Apr '04

The latest issue (7/2004) of one of Germany's most read personal computer periodicals CT' contains an article about Squeak by authors Marcus Denker and Markus Gaelli. It's a general introduction to the system, which relates a bit of the Smalltalk history and draws heavily on etoys for illustration. Apparently, it is meant as an appetizer, because the forecast on the back page for the next issue mentions a Smalltalk programming tutorial course and promises to have an (unspecified) development environment on the accompanying CD (I'd bet that's Squeak, though). Keep on the good work, M&M. :) Cheers, Lothar

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Proposal for implementing services in squeak, need feedback
by Romain Robbes 17 Apr '04

17 Apr '04

Hi all, While trying to dissociate the RB's ui, in order to use it for other browsers, like OmniBrowser and Whisker, I have come up with a more general Service design (and a part of the implementation), that I'd like to share with you, to know if you agree with it, or have propositions to enhance it. The goal is to have a registry of services, classified by categories, and usable by menus, buttons, keystrokes (linking with the KeyMapper should be possible), and a kind of commandline like Vim's one or Emacs' minibuffer (won't you emacs freaks like to type : M-x extract-method ?;-))) Categories should mainly be used by menus, to display relevant actions, otherwise services could be triggered by the commandline or by shortcuts from nearly anywhere (M-x close-window, Alt-w c ...). Categories of services registered could be : -World Menu services -Open/Help/Appearance/Windows/... Menu services (subcategories of the world menu) -Class services -Methods services -Text Selection services -Refactoring services, as subcategories of the Class/Methods and Text Selection services -Browser's button bar services. This way adding services to the system could be much easier. This could permit other services as : - Typing services, using the RefactoryTyper - BrowseUnit services for my case, .... I've also looked at the FileList services, and I think I have a more general solution. So here would be the way to define a service ExtractMethodRefactoring >> service : "answer a service using the current code selection to extract it" ^ Service new label: 'Extract method'; description: 'Extracts the current code selection, in a new method using the necessary parameters, replacing the selection with a self message send.' action: [:class :selector :selection | (self extract: selection from: selector in: class) execute] These would be the default parameters to provide, optional one includes : condition: [:selectionNode | selectionNode isMessage] Precondition for the service to execute/ to be displayed in a menu. shortLabel: 'extract' shorter label for a button / label is for a menu/ or for the command name answerDo: [:answer | self inform: 'extraction was succesfull'] if the service user wants to use the result of the service Now you must be wondering how to fetch the parameters to fill the blocks used. The idea would be to use a Requestor object, using the #requestor: message, which wil act as an interface between the service user and the service : For each of the arguments needed by the service (for the refactoring service, these would be : selectionNode, and then class, selector, selection), a method is triggered in the Requestor : requestSelectionNode, requestClass, requestSelector, requestSelection. The Requestor base class handles them in a default way, asking the users for the parameters, via FillInTheBlanks at the moment, and is able to handle unknow requests in a default way. The requestor can them be subclassed to handle particular queries, i.e BrowserRequestor >> requestClass ^ myBrowser selectedClassOrMetaclass BrowserRequestor >> requestSelector ^ myBrowser selectedMessageName BrowserRequestor >> requestSelection ^ myBrowser selectionInterval FileRequestor >> requestFileName WindowRequestor >> requestSystemWindow ^ myWindow Requestor >> requestSystemWindow "pop up a window list and ask the user for a window" The service would be used by an object by finding them, querying the Service class for available services or service categories, giving the services the object's requestor, and displaying them. What do you think of this (If you read this far that is) ? So far I have implemented Services and their displaying as menu and buttons, Some requestor classes and methods, tested them with various services (The ExtractMethodRefactoring works with the basic requestor and the browser requestor for example, asking the user for parameters in one case, fetching them in the current browsed method for the other), and I am implementing services categories and the service registry. Remaining works includes referencing a lot of services (senders/implementors, the world menu ...) but the refactorings are working with a previous version of the stuff, so they won't be hard to include. Thanks for any feedback, Romain

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Re: How are Block Closures?
by Chris Muller 15 Apr '04

15 Apr '04

> I hope to find more time now, but I fear that it will be another month > or so till > I can put some real time into this again. Fantastic, thank you Marcus! I had asked about this a couple of years ago, and Tim Rowledge indicated that his 'New CompiledMethod' stuff was planned to be part of it. http://lists.squeakfoundation.org/pipermail/squeak-dev/2002-February/035684… I sincerely hope this is still this case as it breaks wide open two great things; easier serialization/materialization of CompiledMethods and, hopefully, faster reflection. Is the new CompiledMethod planned? Thanks..

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